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/*
* Single source autogenerated distributable for Duktape 1.5.1.
*
* Git commit 2cc76e9ff1f64869e1146ad7317d8cbe33bbd27e (v1.5.1).
* Git branch HEAD.
*
* See Duktape AUTHORS.rst and LICENSE.txt for copyright and
* licensing information.
*/
/* LICENSE.txt */
/*
* ===============
* Duktape license
* ===============
*
* (http://opensource.org/licenses/MIT)
*
* Copyright (c) 2013-2016 by Duktape authors (see AUTHORS.rst)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/* AUTHORS.rst */
/*
* ===============
* Duktape authors
* ===============
*
* Copyright
* =========
*
* Duktape copyrights are held by its authors. Each author has a copyright
* to their contribution, and agrees to irrevocably license the contribution
* under the Duktape ``LICENSE.txt``.
*
* Authors
* =======
*
* Please include an e-mail address, a link to your GitHub profile, or something
* similar to allow your contribution to be identified accurately.
*
* The following people have contributed code, website contents, or Wiki contents,
* and agreed to irrevocably license their contributions under the Duktape
* ``LICENSE.txt`` (in order of appearance):
*
* * Sami Vaarala <sami.vaarala@iki.fi>
* * Niki Dobrev
* * Andreas \u00d6man <andreas@lonelycoder.com>
* * L\u00e1szl\u00f3 Lang\u00f3 <llango.u-szeged@partner.samsung.com>
* * Legimet <legimet.calc@gmail.com>
* * Karl Skomski <karl@skomski.com>
* * Bruce Pascoe <fatcerberus1@gmail.com>
* * Ren\u00e9 Hollander <rene@rene8888.at>
* * Julien Hamaide (https://github.com/crazyjul)
* * Sebastian G\u00f6tte (https://github.com/jaseg)
*
* Other contributions
* ===================
*
* The following people have contributed something other than code (e.g. reported
* bugs, provided ideas, etc; roughly in order of appearance):
*
* * Greg Burns
* * Anthony Rabine
* * Carlos Costa
* * Aur\u00e9lien Bouilland
* * Preet Desai (Pris Matic)
* * judofyr (http://www.reddit.com/user/judofyr)
* * Jason Woofenden
* * Micha\u0142 Przyby\u015b
* * Anthony Howe
* * Conrad Pankoff
* * Jim Schimpf
* * Rajaran Gaunker (https://github.com/zimbabao)
* * Andreas \u00d6man
* * Doug Sanden
* * Josh Engebretson (https://github.com/JoshEngebretson)
* * Remo Eichenberger (https://github.com/remoe)
* * Mamod Mehyar (https://github.com/mamod)
* * David Demelier (https://github.com/markand)
* * Tim Caswell (https://github.com/creationix)
* * Mitchell Blank Jr (https://github.com/mitchblank)
* * https://github.com/yushli
* * Seo Sanghyeon (https://github.com/sanxiyn)
* * Han ChoongWoo (https://github.com/tunz)
* * Joshua Peek (https://github.com/josh)
* * Bruce E. Pascoe (https://github.com/fatcerberus)
* * https://github.com/Kelledin
* * https://github.com/sstruchtrup
* * Michael Drake (https://github.com/tlsa)
* * https://github.com/chris-y
* * Laurent Zubiaur (https://github.com/lzubiaur)
* * Ole Andr\u00e9 Vadla Ravn\u00e5s (https://github.com/oleavr)
*
* If you are accidentally missing from this list, send me an e-mail
* (``sami.vaarala@iki.fi``) and I'll fix the omission.
*/
#line 1 "duk_internal.h"
/*
* Top-level include file to be used for all (internal) source files.
*
* Source files should not include individual header files, as they
* have not been designed to be individually included.
*/
#ifndef DUK_INTERNAL_H_INCLUDED
#define DUK_INTERNAL_H_INCLUDED
/*
* The 'duktape.h' header provides the public API, but also handles all
* compiler and platform specific feature detection, Duktape feature
* resolution, inclusion of system headers, etc. These have been merged
* because the public API is also dependent on e.g. detecting appropriate
* C types which is quite platform/compiler specific especially for a non-C99
* build. The public API is also dependent on the resolved feature set.
*
* Some actions taken by the merged header (such as including system headers)
* are not appropriate for building a user application. The define
* DUK_COMPILING_DUKTAPE allows the merged header to skip/include some
* sections depending on what is being built.
*/
#define DUK_COMPILING_DUKTAPE
#include "duktape.h"
/*
* User declarations, e.g. prototypes for user functions used by Duktape
* macros. Concretely, if DUK_USE_PANIC_HANDLER is used and the macro
* value calls a user function, it needs to be declared for Duktape
* compilation to avoid warnings.
*/
DUK_USE_USER_DECLARE()
/*
* Duktape includes (other than duk_features.h)
*
* The header files expect to be included in an order which satisfies header
* dependencies correctly (the headers themselves don't include any other
* includes). Forward declarations are used to break circular struct/typedef
* dependencies.
*/
#line 1 "duk_replacements.h"
#ifndef DUK_REPLACEMENTS_H_INCLUDED
#define DUK_REPLACEMENTS_H_INCLUDED
#if !defined(DUK_SINGLE_FILE)
#if defined(DUK_USE_COMPUTED_INFINITY)
DUK_INTERNAL_DECL double duk_computed_infinity;
#endif
#if defined(DUK_USE_COMPUTED_NAN)
DUK_INTERNAL_DECL double duk_computed_nan;
#endif
#if defined(DUK_USE_REPL_FPCLASSIFY)
DUK_INTERNAL_DECL int duk_repl_fpclassify(double x);
#endif
#if defined(DUK_USE_REPL_SIGNBIT)
DUK_INTERNAL_DECL int duk_repl_signbit(double x);
#endif
#if defined(DUK_USE_REPL_ISFINITE)
DUK_INTERNAL_DECL int duk_repl_isfinite(double x);
#endif
#if defined(DUK_USE_REPL_ISNAN)
DUK_INTERNAL_DECL int duk_repl_isnan(double x);
#endif
#if defined(DUK_USE_REPL_ISINF)
DUK_INTERNAL_DECL int duk_repl_isinf(double x);
#endif
#endif /* !DUK_SINGLE_FILE */
#endif /* DUK_REPLACEMENTS_H_INCLUDED */
#line 1 "duk_jmpbuf.h"
/*
* Wrapper for jmp_buf.
*
* This is used because jmp_buf is an array type for backward compatibility.
* Wrapping jmp_buf in a struct makes pointer references, sizeof, etc,
* behave more intuitively.
*
* http://en.wikipedia.org/wiki/Setjmp.h#Member_types
*/
#ifndef DUK_JMPBUF_H_INCLUDED
#define DUK_JMPBUF_H_INCLUDED
#if defined(DUK_USE_CPP_EXCEPTIONS)
struct duk_jmpbuf {
duk_small_int_t dummy; /* unused */
};
#else
struct duk_jmpbuf {
DUK_JMPBUF_TYPE jb;
};
#endif
#endif /* DUK_JMPBUF_H_INCLUDED */
#line 1 "duk_exception.h"
/*
* Exception for Duktape internal throws when C++ exceptions are used
* for long control transfers.
*
* Doesn't inherit from any exception base class to minimize the chance
* that user code would accidentally catch this exception.
*/
#ifndef DUK_EXCEPTION_H_INCLUDED
#define DUK_EXCEPTION_H_INCLUDED
#if defined(DUK_USE_CPP_EXCEPTIONS)
class duk_internal_exception {
/* intentionally empty */
};
#endif
#endif /* DUK_EXCEPTION_H_INCLUDED */
#line 1 "duk_forwdecl.h"
/*
* Forward declarations for all Duktape structures.
*/
#ifndef DUK_FORWDECL_H_INCLUDED
#define DUK_FORWDECL_H_INCLUDED
/*
* Forward declarations
*/
#if defined(DUK_USE_CPP_EXCEPTIONS)
class duk_internal_exception;
#else
struct duk_jmpbuf;
#endif
/* duk_tval intentionally skipped */
struct duk_heaphdr;
struct duk_heaphdr_string;
struct duk_hstring;
struct duk_hstring_external;
struct duk_hobject;
struct duk_hcompiledfunction;
struct duk_hnativefunction;
struct duk_hthread;
struct duk_hbufferobject;
struct duk_hbuffer;
struct duk_hbuffer_fixed;
struct duk_hbuffer_dynamic;
struct duk_hbuffer_external;
struct duk_propaccessor;
union duk_propvalue;
struct duk_propdesc;
struct duk_heap;
struct duk_breakpoint;
struct duk_activation;
struct duk_catcher;
struct duk_strcache;
struct duk_ljstate;
struct duk_strtab_entry;
#ifdef DUK_USE_DEBUG
struct duk_fixedbuffer;
#endif
struct duk_bitdecoder_ctx;
struct duk_bitencoder_ctx;
struct duk_bufwriter_ctx;
struct duk_token;
struct duk_re_token;
struct duk_lexer_point;
struct duk_lexer_ctx;
struct duk_lexer_codepoint;
struct duk_compiler_instr;
struct duk_compiler_func;
struct duk_compiler_ctx;
struct duk_re_matcher_ctx;
struct duk_re_compiler_ctx;
#if defined(DUK_USE_CPP_EXCEPTIONS)
/* no typedef */
#else
typedef struct duk_jmpbuf duk_jmpbuf;
#endif
/* duk_tval intentionally skipped */
typedef struct duk_heaphdr duk_heaphdr;
typedef struct duk_heaphdr_string duk_heaphdr_string;
typedef struct duk_hstring duk_hstring;
typedef struct duk_hstring_external duk_hstring_external;
typedef struct duk_hobject duk_hobject;
typedef struct duk_hcompiledfunction duk_hcompiledfunction;
typedef struct duk_hnativefunction duk_hnativefunction;
typedef struct duk_hbufferobject duk_hbufferobject;
typedef struct duk_hthread duk_hthread;
typedef struct duk_hbuffer duk_hbuffer;
typedef struct duk_hbuffer_fixed duk_hbuffer_fixed;
typedef struct duk_hbuffer_dynamic duk_hbuffer_dynamic;
typedef struct duk_hbuffer_external duk_hbuffer_external;
typedef struct duk_propaccessor duk_propaccessor;
typedef union duk_propvalue duk_propvalue;
typedef struct duk_propdesc duk_propdesc;
typedef struct duk_heap duk_heap;
typedef struct duk_breakpoint duk_breakpoint;
typedef struct duk_activation duk_activation;
typedef struct duk_catcher duk_catcher;
typedef struct duk_strcache duk_strcache;
typedef struct duk_ljstate duk_ljstate;
typedef struct duk_strtab_entry duk_strtab_entry;
#ifdef DUK_USE_DEBUG
typedef struct duk_fixedbuffer duk_fixedbuffer;
#endif
typedef struct duk_bitdecoder_ctx duk_bitdecoder_ctx;
typedef struct duk_bitencoder_ctx duk_bitencoder_ctx;
typedef struct duk_bufwriter_ctx duk_bufwriter_ctx;
typedef struct duk_token duk_token;
typedef struct duk_re_token duk_re_token;
typedef struct duk_lexer_point duk_lexer_point;
typedef struct duk_lexer_ctx duk_lexer_ctx;
typedef struct duk_lexer_codepoint duk_lexer_codepoint;
typedef struct duk_compiler_instr duk_compiler_instr;
typedef struct duk_compiler_func duk_compiler_func;
typedef struct duk_compiler_ctx duk_compiler_ctx;
typedef struct duk_re_matcher_ctx duk_re_matcher_ctx;
typedef struct duk_re_compiler_ctx duk_re_compiler_ctx;
#endif /* DUK_FORWDECL_H_INCLUDED */
#line 1 "duk_tval.h"
/*
* Tagged type definition (duk_tval) and accessor macros.
*
* Access all fields through the accessor macros, as the representation
* is quite tricky.
*
* There are two packed type alternatives: an 8-byte representation
* based on an IEEE double (preferred for compactness), and a 12-byte
* representation (portability). The latter is needed also in e.g.
* 64-bit environments (it usually pads to 16 bytes per value).
*
* Selecting the tagged type format involves many trade-offs (memory
* use, size and performance of generated code, portability, etc),
* see doc/types.rst for a detailed discussion (especially of how the
* IEEE double format is used to pack tagged values).
*
* NB: because macro arguments are often expressions, macros should
* avoid evaluating their argument more than once.
*/
#ifndef DUK_TVAL_H_INCLUDED
#define DUK_TVAL_H_INCLUDED
/* sanity */
#if !defined(DUK_USE_DOUBLE_LE) && !defined(DUK_USE_DOUBLE_ME) && !defined(DUK_USE_DOUBLE_BE)
#error unsupported: cannot determine byte order variant
#endif
#if defined(DUK_USE_PACKED_TVAL)
/* ======================================================================== */
/*
* Packed 8-byte representation
*/
/* use duk_double_union as duk_tval directly */
typedef union duk_double_union duk_tval;
/* tags */
#define DUK_TAG_NORMALIZED_NAN 0x7ff8UL /* the NaN variant we use */
/* avoid tag 0xfff0, no risk of confusion with negative infinity */
#if defined(DUK_USE_FASTINT)
#define DUK_TAG_FASTINT 0xfff1UL /* embed: integer value */
#endif
#define DUK_TAG_UNUSED 0xfff2UL /* marker; not actual tagged value */
#define DUK_TAG_UNDEFINED 0xfff3UL /* embed: nothing */
#define DUK_TAG_NULL 0xfff4UL /* embed: nothing */
#define DUK_TAG_BOOLEAN 0xfff5UL /* embed: 0 or 1 (false or true) */
/* DUK_TAG_NUMBER would logically go here, but it has multiple 'tags' */
#define DUK_TAG_POINTER 0xfff6UL /* embed: void ptr */
#define DUK_TAG_LIGHTFUNC 0xfff7UL /* embed: func ptr */
#define DUK_TAG_STRING 0xfff8UL /* embed: duk_hstring ptr */
#define DUK_TAG_OBJECT 0xfff9UL /* embed: duk_hobject ptr */
#define DUK_TAG_BUFFER 0xfffaUL /* embed: duk_hbuffer ptr */
/* for convenience */
#define DUK_XTAG_BOOLEAN_FALSE 0xfff50000UL
#define DUK_XTAG_BOOLEAN_TRUE 0xfff50001UL
/* two casts to avoid gcc warning: "warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]" */
#if defined(DUK_USE_64BIT_OPS)
#if defined(DUK_USE_DOUBLE_ME)
#define DUK__TVAL_SET_TAGGEDPOINTER(v,h,tag) do { \
(v)->ull[DUK_DBL_IDX_ULL0] = (((duk_uint64_t) (tag)) << 16) | (((duk_uint64_t) (duk_uint32_t) (h)) << 32); \
} while (0)
#else
#define DUK__TVAL_SET_TAGGEDPOINTER(v,h,tag) do { \
(v)->ull[DUK_DBL_IDX_ULL0] = (((duk_uint64_t) (tag)) << 48) | ((duk_uint64_t) (duk_uint32_t) (h)); \
} while (0)
#endif
#else /* DUK_USE_64BIT_OPS */
#define DUK__TVAL_SET_TAGGEDPOINTER(v,h,tag) do { \
(v)->ui[DUK_DBL_IDX_UI0] = ((duk_uint32_t) (tag)) << 16; \
(v)->ui[DUK_DBL_IDX_UI1] = (duk_uint32_t) (h); \
} while (0)
#endif /* DUK_USE_64BIT_OPS */
#if defined(DUK_USE_64BIT_OPS)
/* Double casting for pointer to avoid gcc warning (cast from pointer to integer of different size) */
#if defined(DUK_USE_DOUBLE_ME)
#define DUK__TVAL_SET_LIGHTFUNC(v,fp,flags) do { \
(v)->ull[DUK_DBL_IDX_ULL0] = (((duk_uint64_t) DUK_TAG_LIGHTFUNC) << 16) | \
((duk_uint64_t) (flags)) | \
(((duk_uint64_t) (duk_uint32_t) (fp)) << 32); \
} while (0)
#else
#define DUK__TVAL_SET_LIGHTFUNC(v,fp,flags) do { \
(v)->ull[DUK_DBL_IDX_ULL0] = (((duk_uint64_t) DUK_TAG_LIGHTFUNC) << 48) | \
(((duk_uint64_t) (flags)) << 32) | \
((duk_uint64_t) (duk_uint32_t) (fp)); \
} while (0)
#endif
#else /* DUK_USE_64BIT_OPS */
#define DUK__TVAL_SET_LIGHTFUNC(v,fp,flags) do { \
(v)->ui[DUK_DBL_IDX_UI0] = (((duk_uint32_t) DUK_TAG_LIGHTFUNC) << 16) | ((duk_uint32_t) (flags)); \
(v)->ui[DUK_DBL_IDX_UI1] = (duk_uint32_t) (fp); \
} while (0)
#endif /* DUK_USE_64BIT_OPS */
#if defined(DUK_USE_FASTINT)
/* Note: masking is done for 'i' to deal with negative numbers correctly */
#if defined(DUK_USE_DOUBLE_ME)
#define DUK__TVAL_SET_FASTINT(v,i) do { \
(v)->ui[DUK_DBL_IDX_UI0] = ((duk_uint32_t) DUK_TAG_FASTINT) << 16 | (((duk_uint32_t) ((i) >> 32)) & 0x0000ffffUL); \
(v)->ui[DUK_DBL_IDX_UI1] = (duk_uint32_t) (i); \
} while (0)
#define DUK__TVAL_SET_FASTINT_U32(v,i) do { \
(v)->ui[DUK_DBL_IDX_UI0] = ((duk_uint32_t) DUK_TAG_FASTINT) << 16; \
(v)->ui[DUK_DBL_IDX_UI1] = (duk_uint32_t) (i); \
} while (0)
#else
#define DUK__TVAL_SET_FASTINT(v,i) do { \
(v)->ull[DUK_DBL_IDX_ULL0] = (((duk_uint64_t) DUK_TAG_FASTINT) << 48) | (((duk_uint64_t) (i)) & 0x0000ffffffffffffULL); \
} while (0)
#define DUK__TVAL_SET_FASTINT_U32(v,i) do { \
(v)->ull[DUK_DBL_IDX_ULL0] = (((duk_uint64_t) DUK_TAG_FASTINT) << 48) | (duk_uint64_t) (i); \
} while (0)
#endif
#define DUK__TVAL_SET_FASTINT_I32(v,i) do { \
duk_int64_t duk__tmp = (duk_int64_t) (i); \
DUK_TVAL_SET_FASTINT((v), duk__tmp); \
} while (0)
/* XXX: clumsy sign extend and masking of 16 topmost bits */
#if defined(DUK_USE_DOUBLE_ME)
#define DUK__TVAL_GET_FASTINT(v) (((duk_int64_t) ((((duk_uint64_t) (v)->ui[DUK_DBL_IDX_UI0]) << 32) | ((duk_uint64_t) (v)->ui[DUK_DBL_IDX_UI1]))) << 16 >> 16)
#else
#define DUK__TVAL_GET_FASTINT(v) ((((duk_int64_t) (v)->ull[DUK_DBL_IDX_ULL0]) << 16) >> 16)
#endif
#define DUK__TVAL_GET_FASTINT_U32(v) ((v)->ui[DUK_DBL_IDX_UI1])
#define DUK__TVAL_GET_FASTINT_I32(v) ((duk_int32_t) (v)->ui[DUK_DBL_IDX_UI1])
#endif /* DUK_USE_FASTINT */
#define DUK_TVAL_SET_UNDEFINED(v) do { \
(v)->us[DUK_DBL_IDX_US0] = (duk_uint16_t) DUK_TAG_UNDEFINED; \
} while (0)
#define DUK_TVAL_SET_UNUSED(v) do { \
(v)->us[DUK_DBL_IDX_US0] = (duk_uint16_t) DUK_TAG_UNUSED; \
} while (0)
#define DUK_TVAL_SET_NULL(v) do { \
(v)->us[DUK_DBL_IDX_US0] = (duk_uint16_t) DUK_TAG_NULL; \
} while (0)
#define DUK_TVAL_SET_BOOLEAN(v,val) DUK_DBLUNION_SET_HIGH32((v), (((duk_uint32_t) DUK_TAG_BOOLEAN) << 16) | ((duk_uint32_t) (val)))
#define DUK_TVAL_SET_NAN(v) DUK_DBLUNION_SET_NAN_FULL((v))
/* Assumes that caller has normalized NaNs, otherwise trouble ahead. */
#if defined(DUK_USE_FASTINT)
#define DUK_TVAL_SET_DOUBLE(v,d) do { \
duk_double_t duk__dblval; \
duk__dblval = (d); \
DUK_ASSERT_DOUBLE_IS_NORMALIZED(duk__dblval); \
DUK_DBLUNION_SET_DOUBLE((v), duk__dblval); \
} while (0)
#define DUK_TVAL_SET_FASTINT(v,i) DUK__TVAL_SET_FASTINT((v), (i))
#define DUK_TVAL_SET_FASTINT_I32(v,i) DUK__TVAL_SET_FASTINT_I32((v), (i))
#define DUK_TVAL_SET_FASTINT_U32(v,i) DUK__TVAL_SET_FASTINT_U32((v), (i))
#define DUK_TVAL_SET_NUMBER_CHKFAST(v,d) duk_tval_set_number_chkfast((v), (d))
#define DUK_TVAL_SET_NUMBER(v,d) DUK_TVAL_SET_DOUBLE((v), (d))
#define DUK_TVAL_CHKFAST_INPLACE(v) do { \
duk_tval *duk__tv; \
duk_double_t duk__d; \
duk__tv = (v); \
if (DUK_TVAL_IS_DOUBLE(duk__tv)) { \
duk__d = DUK_TVAL_GET_DOUBLE(duk__tv); \
DUK_TVAL_SET_NUMBER_CHKFAST(duk__tv, duk__d); \
} \
} while (0)
#else
#define DUK_TVAL_SET_DOUBLE(v,d) do { \
duk_double_t duk__dblval; \
duk__dblval = (d); \
DUK_ASSERT_DOUBLE_IS_NORMALIZED(duk__dblval); \
DUK_DBLUNION_SET_DOUBLE((v), duk__dblval); \
} while (0)
#define DUK_TVAL_SET_FASTINT(v,i) DUK_TVAL_SET_DOUBLE((v), (duk_double_t) (i)) /* XXX: fast int-to-double */
#define DUK_TVAL_SET_FASTINT_I32(v,i) DUK_TVAL_SET_DOUBLE((v), (duk_double_t) (i))
#define DUK_TVAL_SET_FASTINT_U32(v,i) DUK_TVAL_SET_DOUBLE((v), (duk_double_t) (i))
#define DUK_TVAL_SET_NUMBER_CHKFAST(v,d) DUK_TVAL_SET_DOUBLE((v), (d))
#define DUK_TVAL_SET_NUMBER(v,d) DUK_TVAL_SET_DOUBLE((v), (d))
#define DUK_TVAL_CHKFAST_INPLACE(v) do { } while (0)
#endif
#define DUK_TVAL_SET_LIGHTFUNC(v,fp,flags) DUK__TVAL_SET_LIGHTFUNC((v), (fp), (flags))
#define DUK_TVAL_SET_STRING(v,h) DUK__TVAL_SET_TAGGEDPOINTER((v), (h), DUK_TAG_STRING)
#define DUK_TVAL_SET_OBJECT(v,h) DUK__TVAL_SET_TAGGEDPOINTER((v), (h), DUK_TAG_OBJECT)
#define DUK_TVAL_SET_BUFFER(v,h) DUK__TVAL_SET_TAGGEDPOINTER((v), (h), DUK_TAG_BUFFER)
#define DUK_TVAL_SET_POINTER(v,p) DUK__TVAL_SET_TAGGEDPOINTER((v), (p), DUK_TAG_POINTER)
#define DUK_TVAL_SET_TVAL(v,x) do { *(v) = *(x); } while (0)
/* getters */
#define DUK_TVAL_GET_BOOLEAN(v) ((int) (v)->us[DUK_DBL_IDX_US1])
#if defined(DUK_USE_FASTINT)
#define DUK_TVAL_GET_DOUBLE(v) ((v)->d)
#define DUK_TVAL_GET_FASTINT(v) DUK__TVAL_GET_FASTINT((v))
#define DUK_TVAL_GET_FASTINT_U32(v) DUK__TVAL_GET_FASTINT_U32((v))
#define DUK_TVAL_GET_FASTINT_I32(v) DUK__TVAL_GET_FASTINT_I32((v))
#define DUK_TVAL_GET_NUMBER(v) duk_tval_get_number_packed((v))
#else
#define DUK_TVAL_GET_NUMBER(v) ((v)->d)
#define DUK_TVAL_GET_DOUBLE(v) ((v)->d)
#endif
#define DUK_TVAL_GET_LIGHTFUNC(v,out_fp,out_flags) do { \
(out_flags) = (v)->ui[DUK_DBL_IDX_UI0] & 0xffffUL; \
(out_fp) = (duk_c_function) (v)->ui[DUK_DBL_IDX_UI1]; \
} while (0)
#define DUK_TVAL_GET_LIGHTFUNC_FUNCPTR(v) ((duk_c_function) ((v)->ui[DUK_DBL_IDX_UI1]))
#define DUK_TVAL_GET_LIGHTFUNC_FLAGS(v) (((int) (v)->ui[DUK_DBL_IDX_UI0]) & 0xffffUL)
#define DUK_TVAL_GET_STRING(v) ((duk_hstring *) (v)->vp[DUK_DBL_IDX_VP1])
#define DUK_TVAL_GET_OBJECT(v) ((duk_hobject *) (v)->vp[DUK_DBL_IDX_VP1])
#define DUK_TVAL_GET_BUFFER(v) ((duk_hbuffer *) (v)->vp[DUK_DBL_IDX_VP1])
#define DUK_TVAL_GET_POINTER(v) ((void *) (v)->vp[DUK_DBL_IDX_VP1])
#define DUK_TVAL_GET_HEAPHDR(v) ((duk_heaphdr *) (v)->vp[DUK_DBL_IDX_VP1])
/* decoding */
#define DUK_TVAL_GET_TAG(v) ((duk_small_uint_t) (v)->us[DUK_DBL_IDX_US0])
#define DUK_TVAL_IS_UNDEFINED(v) (DUK_TVAL_GET_TAG((v)) == DUK_TAG_UNDEFINED)
#define DUK_TVAL_IS_UNUSED(v) (DUK_TVAL_GET_TAG((v)) == DUK_TAG_UNUSED)
#define DUK_TVAL_IS_NULL(v) (DUK_TVAL_GET_TAG((v)) == DUK_TAG_NULL)
#define DUK_TVAL_IS_BOOLEAN(v) (DUK_TVAL_GET_TAG((v)) == DUK_TAG_BOOLEAN)
#define DUK_TVAL_IS_BOOLEAN_TRUE(v) ((v)->ui[DUK_DBL_IDX_UI0] == DUK_XTAG_BOOLEAN_TRUE)
#define DUK_TVAL_IS_BOOLEAN_FALSE(v) ((v)->ui[DUK_DBL_IDX_UI0] == DUK_XTAG_BOOLEAN_FALSE)
#define DUK_TVAL_IS_LIGHTFUNC(v) (DUK_TVAL_GET_TAG((v)) == DUK_TAG_LIGHTFUNC)
#define DUK_TVAL_IS_STRING(v) (DUK_TVAL_GET_TAG((v)) == DUK_TAG_STRING)
#define DUK_TVAL_IS_OBJECT(v) (DUK_TVAL_GET_TAG((v)) == DUK_TAG_OBJECT)
#define DUK_TVAL_IS_BUFFER(v) (DUK_TVAL_GET_TAG((v)) == DUK_TAG_BUFFER)
#define DUK_TVAL_IS_POINTER(v) (DUK_TVAL_GET_TAG((v)) == DUK_TAG_POINTER)
#if defined(DUK_USE_FASTINT)
/* 0xfff0 is -Infinity */
#define DUK_TVAL_IS_DOUBLE(v) (DUK_TVAL_GET_TAG((v)) <= 0xfff0UL)
#define DUK_TVAL_IS_FASTINT(v) (DUK_TVAL_GET_TAG((v)) == DUK_TAG_FASTINT)
#define DUK_TVAL_IS_NUMBER(v) (DUK_TVAL_GET_TAG((v)) <= 0xfff1UL)
#else
#define DUK_TVAL_IS_NUMBER(v) (DUK_TVAL_GET_TAG((v)) <= 0xfff0UL)
#define DUK_TVAL_IS_DOUBLE(v) DUK_TVAL_IS_NUMBER((v))
#endif
/* This is performance critical because it appears in every DECREF. */
#define DUK_TVAL_IS_HEAP_ALLOCATED(v) (DUK_TVAL_GET_TAG((v)) >= DUK_TAG_STRING)
#if defined(DUK_USE_FASTINT)
DUK_INTERNAL_DECL duk_double_t duk_tval_get_number_packed(duk_tval *tv);
#endif
#else /* DUK_USE_PACKED_TVAL */
/* ======================================================================== */
/*
* Portable 12-byte representation
*/
/* Note: not initializing all bytes is normally not an issue: Duktape won't
* read or use the uninitialized bytes so valgrind won't issue warnings.
* In some special cases a harmless valgrind warning may be issued though.
* For example, the DumpHeap debugger command writes out a compiled function's
* 'data' area as is, including any uninitialized bytes, which causes a
* valgrind warning.
*/
typedef struct duk_tval_struct duk_tval;
struct duk_tval_struct {
duk_small_uint_t t;
duk_small_uint_t v_extra;
union {
duk_double_t d;
duk_small_int_t i;
#if defined(DUK_USE_FASTINT)
duk_int64_t fi; /* if present, forces 16-byte duk_tval */
#endif
void *voidptr;
duk_hstring *hstring;
duk_hobject *hobject;
duk_hcompiledfunction *hcompiledfunction;
duk_hnativefunction *hnativefunction;
duk_hthread *hthread;
duk_hbuffer *hbuffer;
duk_heaphdr *heaphdr;
duk_c_function lightfunc;
} v;
};
#define DUK__TAG_NUMBER 0 /* not exposed */
#if defined(DUK_USE_FASTINT)
#define DUK_TAG_FASTINT 1
#endif
#define DUK_TAG_UNDEFINED 2
#define DUK_TAG_NULL 3
#define DUK_TAG_BOOLEAN 4
#define DUK_TAG_POINTER 5
#define DUK_TAG_LIGHTFUNC 6
#define DUK_TAG_UNUSED 7 /* marker; not actual tagged type */
#define DUK_TAG_STRING 8 /* first heap allocated, match bit boundary */
#define DUK_TAG_OBJECT 9
#define DUK_TAG_BUFFER 10
/* DUK__TAG_NUMBER is intentionally first, as it is the default clause in code
* to support the 8-byte representation. Further, it is a non-heap-allocated
* type so it should come before DUK_TAG_STRING. Finally, it should not break
* the tag value ranges covered by case-clauses in a switch-case.
*/
/* setters */
#define DUK_TVAL_SET_UNDEFINED(tv) do { \
(tv)->t = DUK_TAG_UNDEFINED; \
} while (0)
#define DUK_TVAL_SET_UNUSED(tv) do { \
(tv)->t = DUK_TAG_UNUSED; \
} while (0)
#define DUK_TVAL_SET_NULL(tv) do { \
(tv)->t = DUK_TAG_NULL; \
} while (0)
#define DUK_TVAL_SET_BOOLEAN(tv,val) do { \
(tv)->t = DUK_TAG_BOOLEAN; \
(tv)->v.i = (val); \
} while (0)
#if defined(DUK_USE_FASTINT)
#define DUK_TVAL_SET_DOUBLE(tv,val) do { \
(tv)->t = DUK__TAG_NUMBER; \
(tv)->v.d = (val); \
} while (0)
#define DUK_TVAL_SET_FASTINT(tv,val) do { \
(tv)->t = DUK_TAG_FASTINT; \
(tv)->v.fi = (val); \
} while (0)
#define DUK_TVAL_SET_FASTINT_U32(tv,val) do { \
(tv)->t = DUK_TAG_FASTINT; \
(tv)->v.fi = (duk_int64_t) (val); \
} while (0)
#define DUK_TVAL_SET_FASTINT_I32(tv,val) do { \
(tv)->t = DUK_TAG_FASTINT; \
(tv)->v.fi = (duk_int64_t) (val); \
} while (0)
#define DUK_TVAL_SET_NUMBER_CHKFAST(tv,d) \
duk_tval_set_number_chkfast((tv), (d))
#define DUK_TVAL_SET_NUMBER(tv,val) \
DUK_TVAL_SET_DOUBLE((tv), (val))
#define DUK_TVAL_CHKFAST_INPLACE(v) do { \
duk_tval *duk__tv; \
duk_double_t duk__d; \
duk__tv = (v); \
if (DUK_TVAL_IS_DOUBLE(duk__tv)) { \
duk__d = DUK_TVAL_GET_DOUBLE(duk__tv); \
DUK_TVAL_SET_NUMBER_CHKFAST(duk__tv, duk__d); \
} \
} while (0)
#else
#define DUK_TVAL_SET_DOUBLE(tv,d) \
DUK_TVAL_SET_NUMBER((tv), (d))
#define DUK_TVAL_SET_FASTINT(tv,val) \
DUK_TVAL_SET_NUMBER((tv), (duk_double_t) (val)) /* XXX: fast int-to-double */
#define DUK_TVAL_SET_FASTINT_U32(tv,val) \
DUK_TVAL_SET_NUMBER((tv), (duk_double_t) (val))
#define DUK_TVAL_SET_FASTINT_I32(tv,val) \
DUK_TVAL_SET_NUMBER((tv), (duk_double_t) (val))
#define DUK_TVAL_SET_NUMBER(tv,val) do { \
(tv)->t = DUK__TAG_NUMBER; \
(tv)->v.d = (val); \
} while (0)
#define DUK_TVAL_SET_NUMBER_CHKFAST(tv,d) \
DUK_TVAL_SET_NUMBER((tv), (d))
#define DUK_TVAL_CHKFAST_INPLACE(v) do { } while (0)
#endif /* DUK_USE_FASTINT */
#define DUK_TVAL_SET_POINTER(tv,hptr) do { \
(tv)->t = DUK_TAG_POINTER; \
(tv)->v.voidptr = (hptr); \
} while (0)
#define DUK_TVAL_SET_LIGHTFUNC(tv,fp,flags) do { \
(tv)->t = DUK_TAG_LIGHTFUNC; \
(tv)->v_extra = (flags); \
(tv)->v.lightfunc = (duk_c_function) (fp); \
} while (0)
#define DUK_TVAL_SET_STRING(tv,hptr) do { \
(tv)->t = DUK_TAG_STRING; \
(tv)->v.hstring = (hptr); \
} while (0)
#define DUK_TVAL_SET_OBJECT(tv,hptr) do { \
(tv)->t = DUK_TAG_OBJECT; \
(tv)->v.hobject = (hptr); \
} while (0)
#define DUK_TVAL_SET_BUFFER(tv,hptr) do { \
(tv)->t = DUK_TAG_BUFFER; \
(tv)->v.hbuffer = (hptr); \
} while (0)
#define DUK_TVAL_SET_NAN(tv) do { \
/* in non-packed representation we don't care about which NaN is used */ \
(tv)->t = DUK__TAG_NUMBER; \
(tv)->v.d = DUK_DOUBLE_NAN; \
} while (0)
#define DUK_TVAL_SET_TVAL(v,x) do { *(v) = *(x); } while (0)
/* getters */
#define DUK_TVAL_GET_BOOLEAN(tv) ((tv)->v.i)
#if defined(DUK_USE_FASTINT)
#define DUK_TVAL_GET_DOUBLE(tv) ((tv)->v.d)
#define DUK_TVAL_GET_FASTINT(tv) ((tv)->v.fi)
#define DUK_TVAL_GET_FASTINT_U32(tv) ((duk_uint32_t) ((tv)->v.fi))
#define DUK_TVAL_GET_FASTINT_I32(tv) ((duk_int32_t) ((tv)->v.fi))
#if 0
#define DUK_TVAL_GET_NUMBER(tv) (DUK_TVAL_IS_FASTINT((tv)) ? \
(duk_double_t) DUK_TVAL_GET_FASTINT((tv)) : \
DUK_TVAL_GET_DOUBLE((tv)))
#define DUK_TVAL_GET_NUMBER(tv) duk_tval_get_number_unpacked((tv))
#else
/* This seems reasonable overall. */
#define DUK_TVAL_GET_NUMBER(tv) (DUK_TVAL_IS_FASTINT((tv)) ? \
duk_tval_get_number_unpacked_fastint((tv)) : \
DUK_TVAL_GET_DOUBLE((tv)))
#endif
#else
#define DUK_TVAL_GET_NUMBER(tv) ((tv)->v.d)
#define DUK_TVAL_GET_DOUBLE(tv) ((tv)->v.d)
#endif /* DUK_USE_FASTINT */
#define DUK_TVAL_GET_POINTER(tv) ((tv)->v.voidptr)
#define DUK_TVAL_GET_LIGHTFUNC(tv,out_fp,out_flags) do { \
(out_flags) = (duk_uint32_t) (tv)->v_extra; \
(out_fp) = (tv)->v.lightfunc; \
} while (0)
#define DUK_TVAL_GET_LIGHTFUNC_FUNCPTR(tv) ((tv)->v.lightfunc)
#define DUK_TVAL_GET_LIGHTFUNC_FLAGS(tv) ((duk_uint32_t) ((tv)->v_extra))
#define DUK_TVAL_GET_STRING(tv) ((tv)->v.hstring)
#define DUK_TVAL_GET_OBJECT(tv) ((tv)->v.hobject)
#define DUK_TVAL_GET_BUFFER(tv) ((tv)->v.hbuffer)
#define DUK_TVAL_GET_HEAPHDR(tv) ((tv)->v.heaphdr)
/* decoding */
#define DUK_TVAL_GET_TAG(tv) ((tv)->t)
#define DUK_TVAL_IS_UNDEFINED(tv) ((tv)->t == DUK_TAG_UNDEFINED)
#define DUK_TVAL_IS_UNUSED(tv) ((tv)->t == DUK_TAG_UNUSED)
#define DUK_TVAL_IS_NULL(tv) ((tv)->t == DUK_TAG_NULL)
#define DUK_TVAL_IS_BOOLEAN(tv) ((tv)->t == DUK_TAG_BOOLEAN)
#define DUK_TVAL_IS_BOOLEAN_TRUE(tv) (((tv)->t == DUK_TAG_BOOLEAN) && ((tv)->v.i != 0))
#define DUK_TVAL_IS_BOOLEAN_FALSE(tv) (((tv)->t == DUK_TAG_BOOLEAN) && ((tv)->v.i == 0))
#if defined(DUK_USE_FASTINT)
#define DUK_TVAL_IS_DOUBLE(tv) ((tv)->t == DUK__TAG_NUMBER)
#define DUK_TVAL_IS_FASTINT(tv) ((tv)->t == DUK_TAG_FASTINT)
#define DUK_TVAL_IS_NUMBER(tv) ((tv)->t == DUK__TAG_NUMBER || \
(tv)->t == DUK_TAG_FASTINT)
#else
#define DUK_TVAL_IS_NUMBER(tv) ((tv)->t == DUK__TAG_NUMBER)
#define DUK_TVAL_IS_DOUBLE(v) DUK_TVAL_IS_NUMBER((v))
#endif /* DUK_USE_FASTINT */
#define DUK_TVAL_IS_POINTER(tv) ((tv)->t == DUK_TAG_POINTER)
#define DUK_TVAL_IS_LIGHTFUNC(tv) ((tv)->t == DUK_TAG_LIGHTFUNC)
#define DUK_TVAL_IS_STRING(tv) ((tv)->t == DUK_TAG_STRING)
#define DUK_TVAL_IS_OBJECT(tv) ((tv)->t == DUK_TAG_OBJECT)
#define DUK_TVAL_IS_BUFFER(tv) ((tv)->t == DUK_TAG_BUFFER)
/* This is performance critical because it's needed for every DECREF.
* Take advantage of the fact that the first heap allocated tag is 8,
* so that bit 3 is set for all heap allocated tags (and never set for
* non-heap-allocated tags).
*/
#if 0
#define DUK_TVAL_IS_HEAP_ALLOCATED(tv) ((tv)->t >= DUK_TAG_STRING)
#endif
#define DUK_TVAL_IS_HEAP_ALLOCATED(tv) ((tv)->t & 0x08)
#if defined(DUK_USE_FASTINT)
#if 0
DUK_INTERNAL_DECL duk_double_t duk_tval_get_number_unpacked(duk_tval *tv);
#endif
DUK_INTERNAL_DECL duk_double_t duk_tval_get_number_unpacked_fastint(duk_tval *tv);
#endif
#endif /* DUK_USE_PACKED_TVAL */
/*
* Convenience (independent of representation)
*/
#define DUK_TVAL_SET_BOOLEAN_TRUE(v) DUK_TVAL_SET_BOOLEAN(v, 1)
#define DUK_TVAL_SET_BOOLEAN_FALSE(v) DUK_TVAL_SET_BOOLEAN(v, 0)
/* Lightfunc flags packing and unpacking. */
/* Sign extend: 0x0000##00 -> 0x##000000 -> sign extend to 0xssssss## */
#define DUK_LFUNC_FLAGS_GET_MAGIC(lf_flags) \
((((duk_int32_t) (lf_flags)) << 16) >> 24)
#define DUK_LFUNC_FLAGS_GET_LENGTH(lf_flags) \
(((lf_flags) >> 4) & 0x0f)
#define DUK_LFUNC_FLAGS_GET_NARGS(lf_flags) \
((lf_flags) & 0x0f)
#define DUK_LFUNC_FLAGS_PACK(magic,length,nargs) \
(((magic) & 0xff) << 8) | ((length) << 4) | (nargs)
#define DUK_LFUNC_NARGS_VARARGS 0x0f /* varargs marker */
#define DUK_LFUNC_NARGS_MIN 0x00
#define DUK_LFUNC_NARGS_MAX 0x0e /* max, excl. varargs marker */
#define DUK_LFUNC_LENGTH_MIN 0x00
#define DUK_LFUNC_LENGTH_MAX 0x0f
#define DUK_LFUNC_MAGIC_MIN (-0x80)
#define DUK_LFUNC_MAGIC_MAX 0x7f
/* fastint constants etc */
#if defined(DUK_USE_FASTINT)
#define DUK_FASTINT_MIN (-0x800000000000LL)
#define DUK_FASTINT_MAX 0x7fffffffffffLL
#define DUK_FASTINT_BITS 48
DUK_INTERNAL_DECL void duk_tval_set_number_chkfast(duk_tval *tv, duk_double_t x);
#endif
#endif /* DUK_TVAL_H_INCLUDED */
#line 1 "duk_builtins.h"
/*
* Automatically generated by genbuiltins.py, do not edit!
*/
#ifndef DUK_BUILTINS_H_INCLUDED
#define DUK_BUILTINS_H_INCLUDED
#if defined(DUK_USE_ROM_STRINGS)
#error ROM support not enabled, rerun make_dist.py with --rom-support
#else /* DUK_USE_ROM_STRINGS */
#define DUK_STRIDX_UC_UNDEFINED 0 /* 'Undefined' */
#define DUK_HEAP_STRING_UC_UNDEFINED(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_UNDEFINED)
#define DUK_HTHREAD_STRING_UC_UNDEFINED(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_UNDEFINED)
#define DUK_STRIDX_UC_NULL 1 /* 'Null' */
#define DUK_HEAP_STRING_UC_NULL(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_NULL)
#define DUK_HTHREAD_STRING_UC_NULL(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_NULL)
#define DUK_STRIDX_UC_ARGUMENTS 2 /* 'Arguments' */
#define DUK_HEAP_STRING_UC_ARGUMENTS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_ARGUMENTS)
#define DUK_HTHREAD_STRING_UC_ARGUMENTS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_ARGUMENTS)
#define DUK_STRIDX_UC_OBJECT 3 /* 'Object' */
#define DUK_HEAP_STRING_UC_OBJECT(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_OBJECT)
#define DUK_HTHREAD_STRING_UC_OBJECT(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_OBJECT)
#define DUK_STRIDX_UC_FUNCTION 4 /* 'Function' */
#define DUK_HEAP_STRING_UC_FUNCTION(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_FUNCTION)
#define DUK_HTHREAD_STRING_UC_FUNCTION(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_FUNCTION)
#define DUK_STRIDX_ARRAY 5 /* 'Array' */
#define DUK_HEAP_STRING_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ARRAY)
#define DUK_HTHREAD_STRING_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ARRAY)
#define DUK_STRIDX_UC_STRING 6 /* 'String' */
#define DUK_HEAP_STRING_UC_STRING(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_STRING)
#define DUK_HTHREAD_STRING_UC_STRING(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_STRING)
#define DUK_STRIDX_UC_BOOLEAN 7 /* 'Boolean' */
#define DUK_HEAP_STRING_UC_BOOLEAN(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_BOOLEAN)
#define DUK_HTHREAD_STRING_UC_BOOLEAN(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_BOOLEAN)
#define DUK_STRIDX_UC_NUMBER 8 /* 'Number' */
#define DUK_HEAP_STRING_UC_NUMBER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_NUMBER)
#define DUK_HTHREAD_STRING_UC_NUMBER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_NUMBER)
#define DUK_STRIDX_DATE 9 /* 'Date' */
#define DUK_HEAP_STRING_DATE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DATE)
#define DUK_HTHREAD_STRING_DATE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DATE)
#define DUK_STRIDX_REG_EXP 10 /* 'RegExp' */
#define DUK_HEAP_STRING_REG_EXP(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_REG_EXP)
#define DUK_HTHREAD_STRING_REG_EXP(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_REG_EXP)
#define DUK_STRIDX_UC_ERROR 11 /* 'Error' */
#define DUK_HEAP_STRING_UC_ERROR(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_ERROR)
#define DUK_HTHREAD_STRING_UC_ERROR(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_ERROR)
#define DUK_STRIDX_MATH 12 /* 'Math' */
#define DUK_HEAP_STRING_MATH(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_MATH)
#define DUK_HTHREAD_STRING_MATH(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_MATH)
#define DUK_STRIDX_JSON 13 /* 'JSON' */
#define DUK_HEAP_STRING_JSON(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JSON)
#define DUK_HTHREAD_STRING_JSON(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JSON)
#define DUK_STRIDX_EMPTY_STRING 14 /* '' */
#define DUK_HEAP_STRING_EMPTY_STRING(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_EMPTY_STRING)
#define DUK_HTHREAD_STRING_EMPTY_STRING(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_EMPTY_STRING)
#define DUK_STRIDX_ARRAY_BUFFER 15 /* 'ArrayBuffer' */
#define DUK_HEAP_STRING_ARRAY_BUFFER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ARRAY_BUFFER)
#define DUK_HTHREAD_STRING_ARRAY_BUFFER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ARRAY_BUFFER)
#define DUK_STRIDX_DATA_VIEW 16 /* 'DataView' */
#define DUK_HEAP_STRING_DATA_VIEW(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DATA_VIEW)
#define DUK_HTHREAD_STRING_DATA_VIEW(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DATA_VIEW)
#define DUK_STRIDX_INT8_ARRAY 17 /* 'Int8Array' */
#define DUK_HEAP_STRING_INT8_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT8_ARRAY)
#define DUK_HTHREAD_STRING_INT8_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT8_ARRAY)
#define DUK_STRIDX_UINT8_ARRAY 18 /* 'Uint8Array' */
#define DUK_HEAP_STRING_UINT8_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UINT8_ARRAY)
#define DUK_HTHREAD_STRING_UINT8_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UINT8_ARRAY)
#define DUK_STRIDX_UINT8_CLAMPED_ARRAY 19 /* 'Uint8ClampedArray' */
#define DUK_HEAP_STRING_UINT8_CLAMPED_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UINT8_CLAMPED_ARRAY)
#define DUK_HTHREAD_STRING_UINT8_CLAMPED_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UINT8_CLAMPED_ARRAY)
#define DUK_STRIDX_INT16_ARRAY 20 /* 'Int16Array' */
#define DUK_HEAP_STRING_INT16_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT16_ARRAY)
#define DUK_HTHREAD_STRING_INT16_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT16_ARRAY)
#define DUK_STRIDX_UINT16_ARRAY 21 /* 'Uint16Array' */
#define DUK_HEAP_STRING_UINT16_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UINT16_ARRAY)
#define DUK_HTHREAD_STRING_UINT16_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UINT16_ARRAY)
#define DUK_STRIDX_INT32_ARRAY 22 /* 'Int32Array' */
#define DUK_HEAP_STRING_INT32_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT32_ARRAY)
#define DUK_HTHREAD_STRING_INT32_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT32_ARRAY)
#define DUK_STRIDX_UINT32_ARRAY 23 /* 'Uint32Array' */
#define DUK_HEAP_STRING_UINT32_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UINT32_ARRAY)
#define DUK_HTHREAD_STRING_UINT32_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UINT32_ARRAY)
#define DUK_STRIDX_FLOAT32_ARRAY 24 /* 'Float32Array' */
#define DUK_HEAP_STRING_FLOAT32_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_FLOAT32_ARRAY)
#define DUK_HTHREAD_STRING_FLOAT32_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_FLOAT32_ARRAY)
#define DUK_STRIDX_FLOAT64_ARRAY 25 /* 'Float64Array' */
#define DUK_HEAP_STRING_FLOAT64_ARRAY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_FLOAT64_ARRAY)
#define DUK_HTHREAD_STRING_FLOAT64_ARRAY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_FLOAT64_ARRAY)
#define DUK_STRIDX_GLOBAL 26 /* 'global' */
#define DUK_HEAP_STRING_GLOBAL(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_GLOBAL)
#define DUK_HTHREAD_STRING_GLOBAL(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_GLOBAL)
#define DUK_STRIDX_OBJ_ENV 27 /* 'ObjEnv' */
#define DUK_HEAP_STRING_OBJ_ENV(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_OBJ_ENV)
#define DUK_HTHREAD_STRING_OBJ_ENV(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_OBJ_ENV)
#define DUK_STRIDX_DEC_ENV 28 /* 'DecEnv' */
#define DUK_HEAP_STRING_DEC_ENV(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DEC_ENV)
#define DUK_HTHREAD_STRING_DEC_ENV(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DEC_ENV)
#define DUK_STRIDX_UC_BUFFER 29 /* 'Buffer' */
#define DUK_HEAP_STRING_UC_BUFFER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_BUFFER)
#define DUK_HTHREAD_STRING_UC_BUFFER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_BUFFER)
#define DUK_STRIDX_UC_POINTER 30 /* 'Pointer' */
#define DUK_HEAP_STRING_UC_POINTER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_POINTER)
#define DUK_HTHREAD_STRING_UC_POINTER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_POINTER)
#define DUK_STRIDX_UC_THREAD 31 /* 'Thread' */
#define DUK_HEAP_STRING_UC_THREAD(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_UC_THREAD)
#define DUK_HTHREAD_STRING_UC_THREAD(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_UC_THREAD)
#define DUK_STRIDX_EVAL 32 /* 'eval' */
#define DUK_HEAP_STRING_EVAL(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_EVAL)
#define DUK_HTHREAD_STRING_EVAL(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_EVAL)
#define DUK_STRIDX_DEFINE_PROPERTY 33 /* 'defineProperty' */
#define DUK_HEAP_STRING_DEFINE_PROPERTY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DEFINE_PROPERTY)
#define DUK_HTHREAD_STRING_DEFINE_PROPERTY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DEFINE_PROPERTY)
#define DUK_STRIDX_VALUE 34 /* 'value' */
#define DUK_HEAP_STRING_VALUE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_VALUE)
#define DUK_HTHREAD_STRING_VALUE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_VALUE)
#define DUK_STRIDX_WRITABLE 35 /* 'writable' */
#define DUK_HEAP_STRING_WRITABLE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_WRITABLE)
#define DUK_HTHREAD_STRING_WRITABLE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_WRITABLE)
#define DUK_STRIDX_CONFIGURABLE 36 /* 'configurable' */
#define DUK_HEAP_STRING_CONFIGURABLE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CONFIGURABLE)
#define DUK_HTHREAD_STRING_CONFIGURABLE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CONFIGURABLE)
#define DUK_STRIDX_ENUMERABLE 37 /* 'enumerable' */
#define DUK_HEAP_STRING_ENUMERABLE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ENUMERABLE)
#define DUK_HTHREAD_STRING_ENUMERABLE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ENUMERABLE)
#define DUK_STRIDX_JOIN 38 /* 'join' */
#define DUK_HEAP_STRING_JOIN(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JOIN)
#define DUK_HTHREAD_STRING_JOIN(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JOIN)
#define DUK_STRIDX_TO_LOCALE_STRING 39 /* 'toLocaleString' */
#define DUK_HEAP_STRING_TO_LOCALE_STRING(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TO_LOCALE_STRING)
#define DUK_HTHREAD_STRING_TO_LOCALE_STRING(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TO_LOCALE_STRING)
#define DUK_STRIDX_VALUE_OF 40 /* 'valueOf' */
#define DUK_HEAP_STRING_VALUE_OF(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_VALUE_OF)
#define DUK_HTHREAD_STRING_VALUE_OF(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_VALUE_OF)
#define DUK_STRIDX_TO_UTC_STRING 41 /* 'toUTCString' */
#define DUK_HEAP_STRING_TO_UTC_STRING(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TO_UTC_STRING)
#define DUK_HTHREAD_STRING_TO_UTC_STRING(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TO_UTC_STRING)
#define DUK_STRIDX_TO_ISO_STRING 42 /* 'toISOString' */
#define DUK_HEAP_STRING_TO_ISO_STRING(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TO_ISO_STRING)
#define DUK_HTHREAD_STRING_TO_ISO_STRING(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TO_ISO_STRING)
#define DUK_STRIDX_TO_GMT_STRING 43 /* 'toGMTString' */
#define DUK_HEAP_STRING_TO_GMT_STRING(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TO_GMT_STRING)
#define DUK_HTHREAD_STRING_TO_GMT_STRING(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TO_GMT_STRING)
#define DUK_STRIDX_SOURCE 44 /* 'source' */
#define DUK_HEAP_STRING_SOURCE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_SOURCE)
#define DUK_HTHREAD_STRING_SOURCE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_SOURCE)
#define DUK_STRIDX_IGNORE_CASE 45 /* 'ignoreCase' */
#define DUK_HEAP_STRING_IGNORE_CASE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_IGNORE_CASE)
#define DUK_HTHREAD_STRING_IGNORE_CASE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_IGNORE_CASE)
#define DUK_STRIDX_MULTILINE 46 /* 'multiline' */
#define DUK_HEAP_STRING_MULTILINE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_MULTILINE)
#define DUK_HTHREAD_STRING_MULTILINE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_MULTILINE)
#define DUK_STRIDX_LAST_INDEX 47 /* 'lastIndex' */
#define DUK_HEAP_STRING_LAST_INDEX(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LAST_INDEX)
#define DUK_HTHREAD_STRING_LAST_INDEX(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LAST_INDEX)
#define DUK_STRIDX_ESCAPED_EMPTY_REGEXP 48 /* '(?:)' */
#define DUK_HEAP_STRING_ESCAPED_EMPTY_REGEXP(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ESCAPED_EMPTY_REGEXP)
#define DUK_HTHREAD_STRING_ESCAPED_EMPTY_REGEXP(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ESCAPED_EMPTY_REGEXP)
#define DUK_STRIDX_INDEX 49 /* 'index' */
#define DUK_HEAP_STRING_INDEX(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INDEX)
#define DUK_HTHREAD_STRING_INDEX(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INDEX)
#define DUK_STRIDX_PROTOTYPE 50 /* 'prototype' */
#define DUK_HEAP_STRING_PROTOTYPE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_PROTOTYPE)
#define DUK_HTHREAD_STRING_PROTOTYPE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_PROTOTYPE)
#define DUK_STRIDX_CONSTRUCTOR 51 /* 'constructor' */
#define DUK_HEAP_STRING_CONSTRUCTOR(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CONSTRUCTOR)
#define DUK_HTHREAD_STRING_CONSTRUCTOR(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CONSTRUCTOR)
#define DUK_STRIDX_MESSAGE 52 /* 'message' */
#define DUK_HEAP_STRING_MESSAGE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_MESSAGE)
#define DUK_HTHREAD_STRING_MESSAGE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_MESSAGE)
#define DUK_STRIDX_LC_BOOLEAN 53 /* 'boolean' */
#define DUK_HEAP_STRING_LC_BOOLEAN(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_BOOLEAN)
#define DUK_HTHREAD_STRING_LC_BOOLEAN(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_BOOLEAN)
#define DUK_STRIDX_LC_NUMBER 54 /* 'number' */
#define DUK_HEAP_STRING_LC_NUMBER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_NUMBER)
#define DUK_HTHREAD_STRING_LC_NUMBER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_NUMBER)
#define DUK_STRIDX_LC_STRING 55 /* 'string' */
#define DUK_HEAP_STRING_LC_STRING(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_STRING)
#define DUK_HTHREAD_STRING_LC_STRING(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_STRING)
#define DUK_STRIDX_LC_OBJECT 56 /* 'object' */
#define DUK_HEAP_STRING_LC_OBJECT(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_OBJECT)
#define DUK_HTHREAD_STRING_LC_OBJECT(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_OBJECT)
#define DUK_STRIDX_LC_UNDEFINED 57 /* 'undefined' */
#define DUK_HEAP_STRING_LC_UNDEFINED(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_UNDEFINED)
#define DUK_HTHREAD_STRING_LC_UNDEFINED(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_UNDEFINED)
#define DUK_STRIDX_NAN 58 /* 'NaN' */
#define DUK_HEAP_STRING_NAN(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_NAN)
#define DUK_HTHREAD_STRING_NAN(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_NAN)
#define DUK_STRIDX_INFINITY 59 /* 'Infinity' */
#define DUK_HEAP_STRING_INFINITY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INFINITY)
#define DUK_HTHREAD_STRING_INFINITY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INFINITY)
#define DUK_STRIDX_MINUS_INFINITY 60 /* '-Infinity' */
#define DUK_HEAP_STRING_MINUS_INFINITY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_MINUS_INFINITY)
#define DUK_HTHREAD_STRING_MINUS_INFINITY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_MINUS_INFINITY)
#define DUK_STRIDX_MINUS_ZERO 61 /* '-0' */
#define DUK_HEAP_STRING_MINUS_ZERO(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_MINUS_ZERO)
#define DUK_HTHREAD_STRING_MINUS_ZERO(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_MINUS_ZERO)
#define DUK_STRIDX_COMMA 62 /* ',' */
#define DUK_HEAP_STRING_COMMA(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_COMMA)
#define DUK_HTHREAD_STRING_COMMA(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_COMMA)
#define DUK_STRIDX_SPACE 63 /* ' ' */
#define DUK_HEAP_STRING_SPACE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_SPACE)
#define DUK_HTHREAD_STRING_SPACE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_SPACE)
#define DUK_STRIDX_NEWLINE_4SPACE 64 /* '\n ' */
#define DUK_HEAP_STRING_NEWLINE_4SPACE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_NEWLINE_4SPACE)
#define DUK_HTHREAD_STRING_NEWLINE_4SPACE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_NEWLINE_4SPACE)
#define DUK_STRIDX_BRACKETED_ELLIPSIS 65 /* '[...]' */
#define DUK_HEAP_STRING_BRACKETED_ELLIPSIS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_BRACKETED_ELLIPSIS)
#define DUK_HTHREAD_STRING_BRACKETED_ELLIPSIS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_BRACKETED_ELLIPSIS)
#define DUK_STRIDX_INVALID_DATE 66 /* 'Invalid Date' */
#define DUK_HEAP_STRING_INVALID_DATE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INVALID_DATE)
#define DUK_HTHREAD_STRING_INVALID_DATE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INVALID_DATE)
#define DUK_STRIDX_LC_ARGUMENTS 67 /* 'arguments' */
#define DUK_HEAP_STRING_LC_ARGUMENTS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_ARGUMENTS)
#define DUK_HTHREAD_STRING_LC_ARGUMENTS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_ARGUMENTS)
#define DUK_STRIDX_CALLEE 68 /* 'callee' */
#define DUK_HEAP_STRING_CALLEE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CALLEE)
#define DUK_HTHREAD_STRING_CALLEE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CALLEE)
#define DUK_STRIDX_CALLER 69 /* 'caller' */
#define DUK_HEAP_STRING_CALLER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CALLER)
#define DUK_HTHREAD_STRING_CALLER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CALLER)
#define DUK_STRIDX_HAS 70 /* 'has' */
#define DUK_HEAP_STRING_HAS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_HAS)
#define DUK_HTHREAD_STRING_HAS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_HAS)
#define DUK_STRIDX_GET 71 /* 'get' */
#define DUK_HEAP_STRING_GET(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_GET)
#define DUK_HTHREAD_STRING_GET(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_GET)
#define DUK_STRIDX_DELETE_PROPERTY 72 /* 'deleteProperty' */
#define DUK_HEAP_STRING_DELETE_PROPERTY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DELETE_PROPERTY)
#define DUK_HTHREAD_STRING_DELETE_PROPERTY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DELETE_PROPERTY)
#define DUK_STRIDX_ENUMERATE 73 /* 'enumerate' */
#define DUK_HEAP_STRING_ENUMERATE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ENUMERATE)
#define DUK_HTHREAD_STRING_ENUMERATE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ENUMERATE)
#define DUK_STRIDX_OWN_KEYS 74 /* 'ownKeys' */
#define DUK_HEAP_STRING_OWN_KEYS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_OWN_KEYS)
#define DUK_HTHREAD_STRING_OWN_KEYS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_OWN_KEYS)
#define DUK_STRIDX_SET_PROTOTYPE_OF 75 /* 'setPrototypeOf' */
#define DUK_HEAP_STRING_SET_PROTOTYPE_OF(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_SET_PROTOTYPE_OF)
#define DUK_HTHREAD_STRING_SET_PROTOTYPE_OF(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_SET_PROTOTYPE_OF)
#define DUK_STRIDX___PROTO__ 76 /* '__proto__' */
#define DUK_HEAP_STRING___PROTO__(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX___PROTO__)
#define DUK_HTHREAD_STRING___PROTO__(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX___PROTO__)
#define DUK_STRIDX_REQUIRE 77 /* 'require' */
#define DUK_HEAP_STRING_REQUIRE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_REQUIRE)
#define DUK_HTHREAD_STRING_REQUIRE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_REQUIRE)
#define DUK_STRIDX_ID 78 /* 'id' */
#define DUK_HEAP_STRING_ID(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ID)
#define DUK_HTHREAD_STRING_ID(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ID)
#define DUK_STRIDX_EXPORTS 79 /* 'exports' */
#define DUK_HEAP_STRING_EXPORTS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_EXPORTS)
#define DUK_HTHREAD_STRING_EXPORTS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_EXPORTS)
#define DUK_STRIDX_FILENAME 80 /* 'filename' */
#define DUK_HEAP_STRING_FILENAME(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_FILENAME)
#define DUK_HTHREAD_STRING_FILENAME(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_FILENAME)
#define DUK_STRIDX_TO_STRING 81 /* 'toString' */
#define DUK_HEAP_STRING_TO_STRING(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TO_STRING)
#define DUK_HTHREAD_STRING_TO_STRING(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TO_STRING)
#define DUK_STRIDX_TO_JSON 82 /* 'toJSON' */
#define DUK_HEAP_STRING_TO_JSON(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TO_JSON)
#define DUK_HTHREAD_STRING_TO_JSON(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TO_JSON)
#define DUK_STRIDX_TYPE 83 /* 'type' */
#define DUK_HEAP_STRING_TYPE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TYPE)
#define DUK_HTHREAD_STRING_TYPE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TYPE)
#define DUK_STRIDX_DATA 84 /* 'data' */
#define DUK_HEAP_STRING_DATA(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DATA)
#define DUK_HTHREAD_STRING_DATA(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DATA)
#define DUK_STRIDX_LENGTH 85 /* 'length' */
#define DUK_HEAP_STRING_LENGTH(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LENGTH)
#define DUK_HTHREAD_STRING_LENGTH(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LENGTH)
#define DUK_STRIDX_BYTE_LENGTH 86 /* 'byteLength' */
#define DUK_HEAP_STRING_BYTE_LENGTH(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_BYTE_LENGTH)
#define DUK_HTHREAD_STRING_BYTE_LENGTH(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_BYTE_LENGTH)
#define DUK_STRIDX_BYTE_OFFSET 87 /* 'byteOffset' */
#define DUK_HEAP_STRING_BYTE_OFFSET(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_BYTE_OFFSET)
#define DUK_HTHREAD_STRING_BYTE_OFFSET(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_BYTE_OFFSET)
#define DUK_STRIDX_BYTES_PER_ELEMENT 88 /* 'BYTES_PER_ELEMENT' */
#define DUK_HEAP_STRING_BYTES_PER_ELEMENT(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_BYTES_PER_ELEMENT)
#define DUK_HTHREAD_STRING_BYTES_PER_ELEMENT(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_BYTES_PER_ELEMENT)
#define DUK_STRIDX_SET 89 /* 'set' */
#define DUK_HEAP_STRING_SET(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_SET)
#define DUK_HTHREAD_STRING_SET(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_SET)
#define DUK_STRIDX_STACK 90 /* 'stack' */
#define DUK_HEAP_STRING_STACK(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_STACK)
#define DUK_HTHREAD_STRING_STACK(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_STACK)
#define DUK_STRIDX_PC 91 /* 'pc' */
#define DUK_HEAP_STRING_PC(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_PC)
#define DUK_HTHREAD_STRING_PC(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_PC)
#define DUK_STRIDX_LINE_NUMBER 92 /* 'lineNumber' */
#define DUK_HEAP_STRING_LINE_NUMBER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LINE_NUMBER)
#define DUK_HTHREAD_STRING_LINE_NUMBER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LINE_NUMBER)
#define DUK_STRIDX_INT_TRACEDATA 93 /* '\xffTracedata' */
#define DUK_HEAP_STRING_INT_TRACEDATA(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_TRACEDATA)
#define DUK_HTHREAD_STRING_INT_TRACEDATA(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_TRACEDATA)
#define DUK_STRIDX_NAME 94 /* 'name' */
#define DUK_HEAP_STRING_NAME(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_NAME)
#define DUK_HTHREAD_STRING_NAME(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_NAME)
#define DUK_STRIDX_FILE_NAME 95 /* 'fileName' */
#define DUK_HEAP_STRING_FILE_NAME(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_FILE_NAME)
#define DUK_HTHREAD_STRING_FILE_NAME(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_FILE_NAME)
#define DUK_STRIDX_LC_BUFFER 96 /* 'buffer' */
#define DUK_HEAP_STRING_LC_BUFFER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_BUFFER)
#define DUK_HTHREAD_STRING_LC_BUFFER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_BUFFER)
#define DUK_STRIDX_LC_POINTER 97 /* 'pointer' */
#define DUK_HEAP_STRING_LC_POINTER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_POINTER)
#define DUK_HTHREAD_STRING_LC_POINTER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_POINTER)
#define DUK_STRIDX_INT_VALUE 98 /* '\xffValue' */
#define DUK_HEAP_STRING_INT_VALUE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_VALUE)
#define DUK_HTHREAD_STRING_INT_VALUE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_VALUE)
#define DUK_STRIDX_INT_NEXT 99 /* '\xffNext' */
#define DUK_HEAP_STRING_INT_NEXT(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_NEXT)
#define DUK_HTHREAD_STRING_INT_NEXT(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_NEXT)
#define DUK_STRIDX_INT_BYTECODE 100 /* '\xffBytecode' */
#define DUK_HEAP_STRING_INT_BYTECODE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_BYTECODE)
#define DUK_HTHREAD_STRING_INT_BYTECODE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_BYTECODE)
#define DUK_STRIDX_INT_FORMALS 101 /* '\xffFormals' */
#define DUK_HEAP_STRING_INT_FORMALS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_FORMALS)
#define DUK_HTHREAD_STRING_INT_FORMALS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_FORMALS)
#define DUK_STRIDX_INT_VARMAP 102 /* '\xffVarmap' */
#define DUK_HEAP_STRING_INT_VARMAP(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_VARMAP)
#define DUK_HTHREAD_STRING_INT_VARMAP(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_VARMAP)
#define DUK_STRIDX_INT_LEXENV 103 /* '\xffLexenv' */
#define DUK_HEAP_STRING_INT_LEXENV(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_LEXENV)
#define DUK_HTHREAD_STRING_INT_LEXENV(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_LEXENV)
#define DUK_STRIDX_INT_VARENV 104 /* '\xffVarenv' */
#define DUK_HEAP_STRING_INT_VARENV(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_VARENV)
#define DUK_HTHREAD_STRING_INT_VARENV(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_VARENV)
#define DUK_STRIDX_INT_SOURCE 105 /* '\xffSource' */
#define DUK_HEAP_STRING_INT_SOURCE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_SOURCE)
#define DUK_HTHREAD_STRING_INT_SOURCE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_SOURCE)
#define DUK_STRIDX_INT_PC2LINE 106 /* '\xffPc2line' */
#define DUK_HEAP_STRING_INT_PC2LINE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_PC2LINE)
#define DUK_HTHREAD_STRING_INT_PC2LINE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_PC2LINE)
#define DUK_STRIDX_INT_ARGS 107 /* '\xffArgs' */
#define DUK_HEAP_STRING_INT_ARGS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_ARGS)
#define DUK_HTHREAD_STRING_INT_ARGS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_ARGS)
#define DUK_STRIDX_INT_MAP 108 /* '\xffMap' */
#define DUK_HEAP_STRING_INT_MAP(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_MAP)
#define DUK_HTHREAD_STRING_INT_MAP(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_MAP)
#define DUK_STRIDX_INT_FINALIZER 109 /* '\xffFinalizer' */
#define DUK_HEAP_STRING_INT_FINALIZER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_FINALIZER)
#define DUK_HTHREAD_STRING_INT_FINALIZER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_FINALIZER)
#define DUK_STRIDX_INT_HANDLER 110 /* '\xffHandler' */
#define DUK_HEAP_STRING_INT_HANDLER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_HANDLER)
#define DUK_HTHREAD_STRING_INT_HANDLER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_HANDLER)
#define DUK_STRIDX_INT_CALLEE 111 /* '\xffCallee' */
#define DUK_HEAP_STRING_INT_CALLEE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_CALLEE)
#define DUK_HTHREAD_STRING_INT_CALLEE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_CALLEE)
#define DUK_STRIDX_INT_THREAD 112 /* '\xffThread' */
#define DUK_HEAP_STRING_INT_THREAD(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_THREAD)
#define DUK_HTHREAD_STRING_INT_THREAD(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_THREAD)
#define DUK_STRIDX_INT_REGBASE 113 /* '\xffRegbase' */
#define DUK_HEAP_STRING_INT_REGBASE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_REGBASE)
#define DUK_HTHREAD_STRING_INT_REGBASE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_REGBASE)
#define DUK_STRIDX_INT_TARGET 114 /* '\xffTarget' */
#define DUK_HEAP_STRING_INT_TARGET(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_TARGET)
#define DUK_HTHREAD_STRING_INT_TARGET(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_TARGET)
#define DUK_STRIDX_INT_THIS 115 /* '\xffThis' */
#define DUK_HEAP_STRING_INT_THIS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INT_THIS)
#define DUK_HTHREAD_STRING_INT_THIS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INT_THIS)
#define DUK_STRIDX_COMPILE 116 /* 'compile' */
#define DUK_HEAP_STRING_COMPILE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_COMPILE)
#define DUK_HTHREAD_STRING_COMPILE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_COMPILE)
#define DUK_STRIDX_INPUT 117 /* 'input' */
#define DUK_HEAP_STRING_INPUT(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INPUT)
#define DUK_HTHREAD_STRING_INPUT(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INPUT)
#define DUK_STRIDX_ERR_CREATE 118 /* 'errCreate' */
#define DUK_HEAP_STRING_ERR_CREATE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ERR_CREATE)
#define DUK_HTHREAD_STRING_ERR_CREATE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ERR_CREATE)
#define DUK_STRIDX_ERR_THROW 119 /* 'errThrow' */
#define DUK_HEAP_STRING_ERR_THROW(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ERR_THROW)
#define DUK_HTHREAD_STRING_ERR_THROW(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ERR_THROW)
#define DUK_STRIDX_MOD_SEARCH 120 /* 'modSearch' */
#define DUK_HEAP_STRING_MOD_SEARCH(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_MOD_SEARCH)
#define DUK_HTHREAD_STRING_MOD_SEARCH(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_MOD_SEARCH)
#define DUK_STRIDX_MOD_LOADED 121 /* 'modLoaded' */
#define DUK_HEAP_STRING_MOD_LOADED(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_MOD_LOADED)
#define DUK_HTHREAD_STRING_MOD_LOADED(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_MOD_LOADED)
#define DUK_STRIDX_ENV 122 /* 'env' */
#define DUK_HEAP_STRING_ENV(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ENV)
#define DUK_HTHREAD_STRING_ENV(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ENV)
#define DUK_STRIDX_HEX 123 /* 'hex' */
#define DUK_HEAP_STRING_HEX(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_HEX)
#define DUK_HTHREAD_STRING_HEX(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_HEX)
#define DUK_STRIDX_BASE64 124 /* 'base64' */
#define DUK_HEAP_STRING_BASE64(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_BASE64)
#define DUK_HTHREAD_STRING_BASE64(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_BASE64)
#define DUK_STRIDX_JX 125 /* 'jx' */
#define DUK_HEAP_STRING_JX(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JX)
#define DUK_HTHREAD_STRING_JX(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JX)
#define DUK_STRIDX_JC 126 /* 'jc' */
#define DUK_HEAP_STRING_JC(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JC)
#define DUK_HTHREAD_STRING_JC(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JC)
#define DUK_STRIDX_RESUME 127 /* 'resume' */
#define DUK_HEAP_STRING_RESUME(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_RESUME)
#define DUK_HTHREAD_STRING_RESUME(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_RESUME)
#define DUK_STRIDX_FMT 128 /* 'fmt' */
#define DUK_HEAP_STRING_FMT(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_FMT)
#define DUK_HTHREAD_STRING_FMT(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_FMT)
#define DUK_STRIDX_RAW 129 /* 'raw' */
#define DUK_HEAP_STRING_RAW(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_RAW)
#define DUK_HTHREAD_STRING_RAW(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_RAW)
#define DUK_STRIDX_LC_TRACE 130 /* 'trace' */
#define DUK_HEAP_STRING_LC_TRACE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_TRACE)
#define DUK_HTHREAD_STRING_LC_TRACE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_TRACE)
#define DUK_STRIDX_LC_DEBUG 131 /* 'debug' */
#define DUK_HEAP_STRING_LC_DEBUG(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_DEBUG)
#define DUK_HTHREAD_STRING_LC_DEBUG(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_DEBUG)
#define DUK_STRIDX_LC_INFO 132 /* 'info' */
#define DUK_HEAP_STRING_LC_INFO(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_INFO)
#define DUK_HTHREAD_STRING_LC_INFO(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_INFO)
#define DUK_STRIDX_LC_WARN 133 /* 'warn' */
#define DUK_HEAP_STRING_LC_WARN(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_WARN)
#define DUK_HTHREAD_STRING_LC_WARN(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_WARN)
#define DUK_STRIDX_LC_ERROR 134 /* 'error' */
#define DUK_HEAP_STRING_LC_ERROR(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_ERROR)
#define DUK_HTHREAD_STRING_LC_ERROR(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_ERROR)
#define DUK_STRIDX_LC_FATAL 135 /* 'fatal' */
#define DUK_HEAP_STRING_LC_FATAL(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_FATAL)
#define DUK_HTHREAD_STRING_LC_FATAL(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_FATAL)
#define DUK_STRIDX_LC_N 136 /* 'n' */
#define DUK_HEAP_STRING_LC_N(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_N)
#define DUK_HTHREAD_STRING_LC_N(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_N)
#define DUK_STRIDX_LC_L 137 /* 'l' */
#define DUK_HEAP_STRING_LC_L(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_L)
#define DUK_HTHREAD_STRING_LC_L(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_L)
#define DUK_STRIDX_CLOG 138 /* 'clog' */
#define DUK_HEAP_STRING_CLOG(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CLOG)
#define DUK_HTHREAD_STRING_CLOG(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CLOG)
#define DUK_STRIDX_TO_LOG_STRING 139 /* 'toLogString' */
#define DUK_HEAP_STRING_TO_LOG_STRING(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TO_LOG_STRING)
#define DUK_HTHREAD_STRING_TO_LOG_STRING(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TO_LOG_STRING)
#define DUK_STRIDX_JSON_EXT_UNDEFINED 140 /* '{"_undef":true}' */
#define DUK_HEAP_STRING_JSON_EXT_UNDEFINED(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JSON_EXT_UNDEFINED)
#define DUK_HTHREAD_STRING_JSON_EXT_UNDEFINED(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JSON_EXT_UNDEFINED)
#define DUK_STRIDX_JSON_EXT_NAN 141 /* '{"_nan":true}' */
#define DUK_HEAP_STRING_JSON_EXT_NAN(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JSON_EXT_NAN)
#define DUK_HTHREAD_STRING_JSON_EXT_NAN(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JSON_EXT_NAN)
#define DUK_STRIDX_JSON_EXT_POSINF 142 /* '{"_inf":true}' */
#define DUK_HEAP_STRING_JSON_EXT_POSINF(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JSON_EXT_POSINF)
#define DUK_HTHREAD_STRING_JSON_EXT_POSINF(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JSON_EXT_POSINF)
#define DUK_STRIDX_JSON_EXT_NEGINF 143 /* '{"_ninf":true}' */
#define DUK_HEAP_STRING_JSON_EXT_NEGINF(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JSON_EXT_NEGINF)
#define DUK_HTHREAD_STRING_JSON_EXT_NEGINF(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JSON_EXT_NEGINF)
#define DUK_STRIDX_JSON_EXT_FUNCTION1 144 /* '{"_func":true}' */
#define DUK_HEAP_STRING_JSON_EXT_FUNCTION1(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JSON_EXT_FUNCTION1)
#define DUK_HTHREAD_STRING_JSON_EXT_FUNCTION1(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JSON_EXT_FUNCTION1)
#define DUK_STRIDX_JSON_EXT_FUNCTION2 145 /* '{_func:true}' */
#define DUK_HEAP_STRING_JSON_EXT_FUNCTION2(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_JSON_EXT_FUNCTION2)
#define DUK_HTHREAD_STRING_JSON_EXT_FUNCTION2(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_JSON_EXT_FUNCTION2)
#define DUK_STRIDX_BREAK 146 /* 'break' */
#define DUK_HEAP_STRING_BREAK(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_BREAK)
#define DUK_HTHREAD_STRING_BREAK(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_BREAK)
#define DUK_STRIDX_CASE 147 /* 'case' */
#define DUK_HEAP_STRING_CASE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CASE)
#define DUK_HTHREAD_STRING_CASE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CASE)
#define DUK_STRIDX_CATCH 148 /* 'catch' */
#define DUK_HEAP_STRING_CATCH(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CATCH)
#define DUK_HTHREAD_STRING_CATCH(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CATCH)
#define DUK_STRIDX_CONTINUE 149 /* 'continue' */
#define DUK_HEAP_STRING_CONTINUE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CONTINUE)
#define DUK_HTHREAD_STRING_CONTINUE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CONTINUE)
#define DUK_STRIDX_DEBUGGER 150 /* 'debugger' */
#define DUK_HEAP_STRING_DEBUGGER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DEBUGGER)
#define DUK_HTHREAD_STRING_DEBUGGER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DEBUGGER)
#define DUK_STRIDX_DEFAULT 151 /* 'default' */
#define DUK_HEAP_STRING_DEFAULT(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DEFAULT)
#define DUK_HTHREAD_STRING_DEFAULT(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DEFAULT)
#define DUK_STRIDX_DELETE 152 /* 'delete' */
#define DUK_HEAP_STRING_DELETE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DELETE)
#define DUK_HTHREAD_STRING_DELETE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DELETE)
#define DUK_STRIDX_DO 153 /* 'do' */
#define DUK_HEAP_STRING_DO(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_DO)
#define DUK_HTHREAD_STRING_DO(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_DO)
#define DUK_STRIDX_ELSE 154 /* 'else' */
#define DUK_HEAP_STRING_ELSE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ELSE)
#define DUK_HTHREAD_STRING_ELSE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ELSE)
#define DUK_STRIDX_FINALLY 155 /* 'finally' */
#define DUK_HEAP_STRING_FINALLY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_FINALLY)
#define DUK_HTHREAD_STRING_FINALLY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_FINALLY)
#define DUK_STRIDX_FOR 156 /* 'for' */
#define DUK_HEAP_STRING_FOR(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_FOR)
#define DUK_HTHREAD_STRING_FOR(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_FOR)
#define DUK_STRIDX_LC_FUNCTION 157 /* 'function' */
#define DUK_HEAP_STRING_LC_FUNCTION(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_FUNCTION)
#define DUK_HTHREAD_STRING_LC_FUNCTION(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_FUNCTION)
#define DUK_STRIDX_IF 158 /* 'if' */
#define DUK_HEAP_STRING_IF(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_IF)
#define DUK_HTHREAD_STRING_IF(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_IF)
#define DUK_STRIDX_IN 159 /* 'in' */
#define DUK_HEAP_STRING_IN(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_IN)
#define DUK_HTHREAD_STRING_IN(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_IN)
#define DUK_STRIDX_INSTANCEOF 160 /* 'instanceof' */
#define DUK_HEAP_STRING_INSTANCEOF(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INSTANCEOF)
#define DUK_HTHREAD_STRING_INSTANCEOF(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INSTANCEOF)
#define DUK_STRIDX_NEW 161 /* 'new' */
#define DUK_HEAP_STRING_NEW(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_NEW)
#define DUK_HTHREAD_STRING_NEW(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_NEW)
#define DUK_STRIDX_RETURN 162 /* 'return' */
#define DUK_HEAP_STRING_RETURN(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_RETURN)
#define DUK_HTHREAD_STRING_RETURN(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_RETURN)
#define DUK_STRIDX_SWITCH 163 /* 'switch' */
#define DUK_HEAP_STRING_SWITCH(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_SWITCH)
#define DUK_HTHREAD_STRING_SWITCH(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_SWITCH)
#define DUK_STRIDX_THIS 164 /* 'this' */
#define DUK_HEAP_STRING_THIS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_THIS)
#define DUK_HTHREAD_STRING_THIS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_THIS)
#define DUK_STRIDX_THROW 165 /* 'throw' */
#define DUK_HEAP_STRING_THROW(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_THROW)
#define DUK_HTHREAD_STRING_THROW(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_THROW)
#define DUK_STRIDX_TRY 166 /* 'try' */
#define DUK_HEAP_STRING_TRY(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TRY)
#define DUK_HTHREAD_STRING_TRY(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TRY)
#define DUK_STRIDX_TYPEOF 167 /* 'typeof' */
#define DUK_HEAP_STRING_TYPEOF(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TYPEOF)
#define DUK_HTHREAD_STRING_TYPEOF(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TYPEOF)
#define DUK_STRIDX_VAR 168 /* 'var' */
#define DUK_HEAP_STRING_VAR(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_VAR)
#define DUK_HTHREAD_STRING_VAR(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_VAR)
#define DUK_STRIDX_CONST 169 /* 'const' */
#define DUK_HEAP_STRING_CONST(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CONST)
#define DUK_HTHREAD_STRING_CONST(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CONST)
#define DUK_STRIDX_VOID 170 /* 'void' */
#define DUK_HEAP_STRING_VOID(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_VOID)
#define DUK_HTHREAD_STRING_VOID(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_VOID)
#define DUK_STRIDX_WHILE 171 /* 'while' */
#define DUK_HEAP_STRING_WHILE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_WHILE)
#define DUK_HTHREAD_STRING_WHILE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_WHILE)
#define DUK_STRIDX_WITH 172 /* 'with' */
#define DUK_HEAP_STRING_WITH(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_WITH)
#define DUK_HTHREAD_STRING_WITH(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_WITH)
#define DUK_STRIDX_CLASS 173 /* 'class' */
#define DUK_HEAP_STRING_CLASS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_CLASS)
#define DUK_HTHREAD_STRING_CLASS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_CLASS)
#define DUK_STRIDX_ENUM 174 /* 'enum' */
#define DUK_HEAP_STRING_ENUM(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_ENUM)
#define DUK_HTHREAD_STRING_ENUM(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_ENUM)
#define DUK_STRIDX_EXPORT 175 /* 'export' */
#define DUK_HEAP_STRING_EXPORT(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_EXPORT)
#define DUK_HTHREAD_STRING_EXPORT(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_EXPORT)
#define DUK_STRIDX_EXTENDS 176 /* 'extends' */
#define DUK_HEAP_STRING_EXTENDS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_EXTENDS)
#define DUK_HTHREAD_STRING_EXTENDS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_EXTENDS)
#define DUK_STRIDX_IMPORT 177 /* 'import' */
#define DUK_HEAP_STRING_IMPORT(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_IMPORT)
#define DUK_HTHREAD_STRING_IMPORT(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_IMPORT)
#define DUK_STRIDX_SUPER 178 /* 'super' */
#define DUK_HEAP_STRING_SUPER(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_SUPER)
#define DUK_HTHREAD_STRING_SUPER(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_SUPER)
#define DUK_STRIDX_LC_NULL 179 /* 'null' */
#define DUK_HEAP_STRING_LC_NULL(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LC_NULL)
#define DUK_HTHREAD_STRING_LC_NULL(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LC_NULL)
#define DUK_STRIDX_TRUE 180 /* 'true' */
#define DUK_HEAP_STRING_TRUE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_TRUE)
#define DUK_HTHREAD_STRING_TRUE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_TRUE)
#define DUK_STRIDX_FALSE 181 /* 'false' */
#define DUK_HEAP_STRING_FALSE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_FALSE)
#define DUK_HTHREAD_STRING_FALSE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_FALSE)
#define DUK_STRIDX_IMPLEMENTS 182 /* 'implements' */
#define DUK_HEAP_STRING_IMPLEMENTS(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_IMPLEMENTS)
#define DUK_HTHREAD_STRING_IMPLEMENTS(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_IMPLEMENTS)
#define DUK_STRIDX_INTERFACE 183 /* 'interface' */
#define DUK_HEAP_STRING_INTERFACE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_INTERFACE)
#define DUK_HTHREAD_STRING_INTERFACE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_INTERFACE)
#define DUK_STRIDX_LET 184 /* 'let' */
#define DUK_HEAP_STRING_LET(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_LET)
#define DUK_HTHREAD_STRING_LET(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_LET)
#define DUK_STRIDX_PACKAGE 185 /* 'package' */
#define DUK_HEAP_STRING_PACKAGE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_PACKAGE)
#define DUK_HTHREAD_STRING_PACKAGE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_PACKAGE)
#define DUK_STRIDX_PRIVATE 186 /* 'private' */
#define DUK_HEAP_STRING_PRIVATE(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_PRIVATE)
#define DUK_HTHREAD_STRING_PRIVATE(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_PRIVATE)
#define DUK_STRIDX_PROTECTED 187 /* 'protected' */
#define DUK_HEAP_STRING_PROTECTED(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_PROTECTED)
#define DUK_HTHREAD_STRING_PROTECTED(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_PROTECTED)
#define DUK_STRIDX_PUBLIC 188 /* 'public' */
#define DUK_HEAP_STRING_PUBLIC(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_PUBLIC)
#define DUK_HTHREAD_STRING_PUBLIC(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_PUBLIC)
#define DUK_STRIDX_STATIC 189 /* 'static' */
#define DUK_HEAP_STRING_STATIC(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_STATIC)
#define DUK_HTHREAD_STRING_STATIC(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_STATIC)
#define DUK_STRIDX_YIELD 190 /* 'yield' */
#define DUK_HEAP_STRING_YIELD(heap) DUK_HEAP_GET_STRING((heap),DUK_STRIDX_YIELD)
#define DUK_HTHREAD_STRING_YIELD(thr) DUK_HTHREAD_GET_STRING((thr),DUK_STRIDX_YIELD)
#define DUK_HEAP_NUM_STRINGS 191
#define DUK_STRIDX_START_RESERVED 146
#define DUK_STRIDX_START_STRICT_RESERVED 182
#define DUK_STRIDX_END_RESERVED 191 /* exclusive endpoint */
/* To convert a heap stridx to a token number, subtract
* DUK_STRIDX_START_RESERVED and add DUK_TOK_START_RESERVED.
*/
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL const duk_uint8_t duk_strings_data[1049];
#endif /* !DUK_SINGLE_FILE */
#define DUK_STRDATA_MAX_STRLEN 17
#define DUK_STRDATA_DATA_LENGTH 1049
#endif /* DUK_USE_ROM_STRINGS */
#if defined(DUK_USE_ROM_OBJECTS)
#error ROM support not enabled, rerun make_dist.py with --rom-support
#else
DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_function_constructor(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_function_prototype(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_array_constructor(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_string_constructor(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_boolean_constructor(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_number_constructor(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_date_constructor(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_regexp_constructor(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_error_constructor_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_type_error_thrower(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_proxy_constructor(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_thread_constructor(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_buffer_constructor(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_pointer_constructor(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_logger_constructor(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_arraybuffer_constructor(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_dataview_constructor(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_typedarray_constructor(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_constructor(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_eval(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_parse_int(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_parse_float(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_is_nan(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_is_finite(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_decode_uri(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_decode_uri_component(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_encode_uri(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_encode_uri_component(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_escape(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_unescape(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_print_helper(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_global_object_require(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_object_getprototype_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_object_setprototype_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_get_own_property_descriptor(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_keys_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_create(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_define_property(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_define_properties(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_seal_freeze_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_prevent_extensions(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_is_sealed_frozen_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_object_constructor_is_extensible(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_object_prototype_to_string(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_object_prototype_to_locale_string(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_object_prototype_value_of(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_object_prototype_has_own_property(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_object_prototype_is_prototype_of(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_object_prototype_property_is_enumerable(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_function_prototype_to_string(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_function_prototype_apply(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_function_prototype_call(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_function_prototype_bind(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_array_constructor_is_array(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_to_string(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_join_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_concat(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_pop(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_push(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_reverse(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_shift(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_slice(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_sort(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_splice(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_unshift(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_indexof_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_iter_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_array_prototype_reduce_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_string_constructor_from_char_code(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_to_string(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_char_at(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_char_code_at(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_concat(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_indexof_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_locale_compare(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_match(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_replace(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_search(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_slice(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_split(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_substring(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_caseconv_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_trim(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_string_prototype_substr(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_boolean_prototype_tostring_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_number_prototype_to_string(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_number_prototype_to_locale_string(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_number_prototype_value_of(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_number_prototype_to_fixed(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_number_prototype_to_exponential(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_number_prototype_to_precision(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_date_constructor_parse(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_date_constructor_utc(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_date_constructor_now(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_date_prototype_tostring_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_date_prototype_to_json(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_date_prototype_value_of(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_date_prototype_get_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_date_prototype_get_timezone_offset(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_date_prototype_set_time(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_date_prototype_set_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_regexp_prototype_exec(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_regexp_prototype_test(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_regexp_prototype_to_string(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_error_prototype_stack_getter(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_error_prototype_stack_setter(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_error_prototype_filename_getter(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_error_prototype_filename_setter(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_error_prototype_linenumber_getter(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_error_prototype_linenumber_setter(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_error_prototype_to_string(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_math_object_onearg_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_math_object_twoarg_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_math_object_max(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_math_object_min(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_math_object_random(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_json_object_parse(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_json_object_stringify(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_duktape_object_info(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_duktape_object_act(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_duktape_object_gc(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_duktape_object_fin(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_duktape_object_enc(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_duktape_object_dec(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_duktape_object_compact(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_thread_yield(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_thread_resume(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_thread_current(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_buffer_prototype_tostring_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_pointer_prototype_tostring_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_logger_prototype_fmt(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_logger_prototype_raw(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_logger_prototype_log_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_arraybuffer_isview(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_buffer_slice_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_buffer_readfield(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_buffer_writefield(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_typedarray_set(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_concat(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_is_encoding(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_is_buffer(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_byte_length(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_buffer_compare_shared(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_tostring(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_tojson(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_fill(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_copy(duk_context *ctx);
DUK_INTERNAL_DECL duk_ret_t duk_bi_nodejs_buffer_write(duk_context *ctx);
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL const duk_c_function duk_bi_native_functions[149];
#endif /* !DUK_SINGLE_FILE */
#if defined(DUK_USE_BUILTIN_INITJS)
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL const duk_uint8_t duk_initjs_data[187];
#endif /* !DUK_SINGLE_FILE */
#define DUK_BUILTIN_INITJS_DATA_LENGTH 187
#endif /* DUK_USE_BUILTIN_INITJS */
#define DUK_BIDX_GLOBAL 0
#define DUK_BIDX_GLOBAL_ENV 1
#define DUK_BIDX_OBJECT_CONSTRUCTOR 2
#define DUK_BIDX_OBJECT_PROTOTYPE 3
#define DUK_BIDX_FUNCTION_CONSTRUCTOR 4
#define DUK_BIDX_FUNCTION_PROTOTYPE 5
#define DUK_BIDX_ARRAY_CONSTRUCTOR 6
#define DUK_BIDX_ARRAY_PROTOTYPE 7
#define DUK_BIDX_STRING_CONSTRUCTOR 8
#define DUK_BIDX_STRING_PROTOTYPE 9
#define DUK_BIDX_BOOLEAN_CONSTRUCTOR 10
#define DUK_BIDX_BOOLEAN_PROTOTYPE 11
#define DUK_BIDX_NUMBER_CONSTRUCTOR 12
#define DUK_BIDX_NUMBER_PROTOTYPE 13
#define DUK_BIDX_DATE_CONSTRUCTOR 14
#define DUK_BIDX_DATE_PROTOTYPE 15
#define DUK_BIDX_REGEXP_CONSTRUCTOR 16
#define DUK_BIDX_REGEXP_PROTOTYPE 17
#define DUK_BIDX_ERROR_CONSTRUCTOR 18
#define DUK_BIDX_ERROR_PROTOTYPE 19
#define DUK_BIDX_EVAL_ERROR_CONSTRUCTOR 20
#define DUK_BIDX_EVAL_ERROR_PROTOTYPE 21
#define DUK_BIDX_RANGE_ERROR_CONSTRUCTOR 22
#define DUK_BIDX_RANGE_ERROR_PROTOTYPE 23
#define DUK_BIDX_REFERENCE_ERROR_CONSTRUCTOR 24
#define DUK_BIDX_REFERENCE_ERROR_PROTOTYPE 25
#define DUK_BIDX_SYNTAX_ERROR_CONSTRUCTOR 26
#define DUK_BIDX_SYNTAX_ERROR_PROTOTYPE 27
#define DUK_BIDX_TYPE_ERROR_CONSTRUCTOR 28
#define DUK_BIDX_TYPE_ERROR_PROTOTYPE 29
#define DUK_BIDX_URI_ERROR_CONSTRUCTOR 30
#define DUK_BIDX_URI_ERROR_PROTOTYPE 31
#define DUK_BIDX_MATH 32
#define DUK_BIDX_JSON 33
#define DUK_BIDX_TYPE_ERROR_THROWER 34
#define DUK_BIDX_PROXY_CONSTRUCTOR 35
#define DUK_BIDX_DUKTAPE 36
#define DUK_BIDX_THREAD_CONSTRUCTOR 37
#define DUK_BIDX_THREAD_PROTOTYPE 38
#define DUK_BIDX_BUFFER_CONSTRUCTOR 39
#define DUK_BIDX_BUFFER_PROTOTYPE 40
#define DUK_BIDX_POINTER_CONSTRUCTOR 41
#define DUK_BIDX_POINTER_PROTOTYPE 42
#define DUK_BIDX_LOGGER_CONSTRUCTOR 43
#define DUK_BIDX_LOGGER_PROTOTYPE 44
#define DUK_BIDX_DOUBLE_ERROR 45
#define DUK_BIDX_ARRAYBUFFER_CONSTRUCTOR 46
#define DUK_BIDX_ARRAYBUFFER_PROTOTYPE 47
#define DUK_BIDX_DATAVIEW_CONSTRUCTOR 48
#define DUK_BIDX_DATAVIEW_PROTOTYPE 49
#define DUK_BIDX_TYPEDARRAY_PROTOTYPE 50
#define DUK_BIDX_INT8ARRAY_CONSTRUCTOR 51
#define DUK_BIDX_INT8ARRAY_PROTOTYPE 52
#define DUK_BIDX_UINT8ARRAY_CONSTRUCTOR 53
#define DUK_BIDX_UINT8ARRAY_PROTOTYPE 54
#define DUK_BIDX_UINT8CLAMPEDARRAY_CONSTRUCTOR 55
#define DUK_BIDX_UINT8CLAMPEDARRAY_PROTOTYPE 56
#define DUK_BIDX_INT16ARRAY_CONSTRUCTOR 57
#define DUK_BIDX_INT16ARRAY_PROTOTYPE 58
#define DUK_BIDX_UINT16ARRAY_CONSTRUCTOR 59
#define DUK_BIDX_UINT16ARRAY_PROTOTYPE 60
#define DUK_BIDX_INT32ARRAY_CONSTRUCTOR 61
#define DUK_BIDX_INT32ARRAY_PROTOTYPE 62
#define DUK_BIDX_UINT32ARRAY_CONSTRUCTOR 63
#define DUK_BIDX_UINT32ARRAY_PROTOTYPE 64
#define DUK_BIDX_FLOAT32ARRAY_CONSTRUCTOR 65
#define DUK_BIDX_FLOAT32ARRAY_PROTOTYPE 66
#define DUK_BIDX_FLOAT64ARRAY_CONSTRUCTOR 67
#define DUK_BIDX_FLOAT64ARRAY_PROTOTYPE 68
#define DUK_BIDX_NODEJS_BUFFER_CONSTRUCTOR 69
#define DUK_BIDX_NODEJS_BUFFER_PROTOTYPE 70
#define DUK_NUM_BUILTINS 71
#define DUK_NUM_BIDX_BUILTINS 71
#define DUK_NUM_ALL_BUILTINS 71
#if defined(DUK_USE_DOUBLE_LE)
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL const duk_uint8_t duk_builtins_data[3833];
#endif /* !DUK_SINGLE_FILE */
#define DUK_BUILTINS_DATA_LENGTH 3833
#elif defined(DUK_USE_DOUBLE_BE)
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL const duk_uint8_t duk_builtins_data[3833];
#endif /* !DUK_SINGLE_FILE */
#define DUK_BUILTINS_DATA_LENGTH 3833
#elif defined(DUK_USE_DOUBLE_ME)
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL const duk_uint8_t duk_builtins_data[3833];
#endif /* !DUK_SINGLE_FILE */
#define DUK_BUILTINS_DATA_LENGTH 3833
#else
#error invalid endianness defines
#endif
#endif /* DUK_USE_ROM_OBJECTS */
#endif /* DUK_BUILTINS_H_INCLUDED */
#line 52 "duk_internal.h"
#line 1 "duk_util.h"
/*
* Utilities
*/
#ifndef DUK_UTIL_H_INCLUDED
#define DUK_UTIL_H_INCLUDED
#define DUK_UTIL_MIN_HASH_PRIME 17 /* must match genhashsizes.py */
#define DUK_UTIL_GET_HASH_PROBE_STEP(hash) (duk_util_probe_steps[(hash) & 0x1f])
/*
* Endian conversion
*/
#if defined(DUK_USE_INTEGER_LE)
#define DUK_HTON32(x) DUK_BSWAP32((x))
#define DUK_NTOH32(x) DUK_BSWAP32((x))
#define DUK_HTON16(x) DUK_BSWAP16((x))
#define DUK_NTOH16(x) DUK_BSWAP16((x))
#elif defined(DUK_USE_INTEGER_BE)
#define DUK_HTON32(x) (x)
#define DUK_NTOH32(x) (x)
#define DUK_HTON16(x) (x)
#define DUK_NTOH16(x) (x)
#else
#error internal error, endianness defines broken
#endif
/*
* Bitstream decoder
*/
struct duk_bitdecoder_ctx {
const duk_uint8_t *data;
duk_size_t offset;
duk_size_t length;
duk_uint32_t currval;
duk_small_int_t currbits;
};
/*
* Bitstream encoder
*/
struct duk_bitencoder_ctx {
duk_uint8_t *data;
duk_size_t offset;
duk_size_t length;
duk_uint32_t currval;
duk_small_int_t currbits;
duk_small_int_t truncated;
};
/*
* Raw write/read macros for big endian, unaligned basic values.
* Caller ensures there's enough space. The macros update the pointer
* argument automatically on resizes. The idiom seems a bit odd, but
* leads to compact code.
*/
#define DUK_RAW_WRITE_U8(ptr,val) do { \
*(ptr)++ = (duk_uint8_t) (val); \
} while (0)
#define DUK_RAW_WRITE_U16_BE(ptr,val) duk_raw_write_u16_be(&(ptr), (duk_uint16_t) (val))
#define DUK_RAW_WRITE_U32_BE(ptr,val) duk_raw_write_u32_be(&(ptr), (duk_uint32_t) (val))
#define DUK_RAW_WRITE_DOUBLE_BE(ptr,val) duk_raw_write_double_be(&(ptr), (duk_double_t) (val))
#define DUK_RAW_WRITE_XUTF8(ptr,val) do { \
/* 'ptr' is evaluated both as LHS and RHS. */ \
duk_uint8_t *duk__ptr; \
duk_small_int_t duk__len; \
duk__ptr = (duk_uint8_t *) (ptr); \
duk__len = duk_unicode_encode_xutf8((duk_ucodepoint_t) (val), duk__ptr); \
duk__ptr += duk__len; \
(ptr) = duk__ptr; \
} while (0)
#define DUK_RAW_WRITE_CESU8(ptr,val) do { \
/* 'ptr' is evaluated both as LHS and RHS. */ \
duk_uint8_t *duk__ptr; \
duk_small_int_t duk__len; \
duk__ptr = (duk_uint8_t *) (ptr); \
duk__len = duk_unicode_encode_cesu8((duk_ucodepoint_t) (val), duk__ptr); \
duk__ptr += duk__len; \
(ptr) = duk__ptr; \
} while (0)
#define DUK_RAW_READ_U8(ptr) ((duk_uint8_t) (*(ptr)++))
#define DUK_RAW_READ_U16_BE(ptr) duk_raw_read_u16_be(&(ptr));
#define DUK_RAW_READ_U32_BE(ptr) duk_raw_read_u32_be(&(ptr));
#define DUK_RAW_READ_DOUBLE_BE(ptr) duk_raw_read_double_be(&(ptr));
/*
* Buffer writer (dynamic buffer only)
*
* Helper for writing to a dynamic buffer with a concept of a "spare" area
* to reduce resizes. You can ensure there is enough space beforehand and
* then write for a while without further checks, relying on a stable data
* pointer. Spare handling is automatic so call sites only indicate how
* much data they need right now.
*
* There are several ways to write using bufwriter. The best approach
* depends mainly on how much performance matters over code footprint.
* The key issues are (1) ensuring there is space and (2) keeping the
* pointers consistent. Fast code should ensure space for multiple writes
* with one ensure call. Fastest inner loop code can temporarily borrow
* the 'p' pointer but must write it back eventually.
*
* Be careful to ensure all macro arguments (other than static pointers like
* 'thr' and 'bw_ctx') are evaluated exactly once, using temporaries if
* necessary (if that's not possible, there should be a note near the macro).
* Buffer write arguments often contain arithmetic etc so this is
* particularly important here.
*/
/* XXX: Migrate bufwriter and other read/write helpers to its own header? */
struct duk_bufwriter_ctx {
duk_uint8_t *p;
duk_uint8_t *p_base;
duk_uint8_t *p_limit;
duk_hbuffer_dynamic *buf;
};
#define DUK_BW_SPARE_ADD 64
#define DUK_BW_SPARE_SHIFT 4 /* 2^4 -> 1/16 = 6.25% spare */
/* Initialization and finalization (compaction), converting to other types. */
#define DUK_BW_INIT_PUSHBUF(thr,bw_ctx,sz) do { \
duk_bw_init_pushbuf((thr), (bw_ctx), (sz)); \
} while (0)
#define DUK_BW_INIT_WITHBUF(thr,bw_ctx,buf) do { \
duk_bw_init((thr), (bw_ctx), (buf)); \
} while (0)
#define DUK_BW_COMPACT(thr,bw_ctx) do { \
/* Make underlying buffer compact to match DUK_BW_GET_SIZE(). */ \
duk_bw_compact((thr), (bw_ctx)); \
} while (0)
#define DUK_BW_PUSH_AS_STRING(thr,bw_ctx) do { \
duk_push_lstring((duk_context *) (thr), \
(const char *) (bw_ctx)->p_base, \
(duk_size_t) ((bw_ctx)->p - (bw_ctx)->p_base)); \
} while (0)
/* Pointers may be NULL for a while when 'buf' size is zero and before any
* ENSURE calls have been made. Once an ENSURE has been made, the pointers
* are required to be non-NULL so that it's always valid to use memcpy() and
* memmove(), even for zero size.
*/
#define DUK_BW_ASSERT_VALID_EXPR(thr,bw_ctx) \
DUK_ASSERT_EXPR((bw_ctx) != NULL && \
(bw_ctx)->buf != NULL && \
((DUK_HBUFFER_DYNAMIC_GET_SIZE((bw_ctx)->buf) == 0) || \
((bw_ctx)->p != NULL && \
(bw_ctx)->p_base != NULL && \
(bw_ctx)->p_limit != NULL && \
(bw_ctx)->p_limit >= (bw_ctx)->p_base && \
(bw_ctx)->p >= (bw_ctx)->p_base && \
(bw_ctx)->p <= (bw_ctx)->p_limit)))
#define DUK_BW_ASSERT_VALID(thr,bw_ctx) do { \
DUK_BW_ASSERT_VALID_EXPR((thr), (bw_ctx)); \
} while (0)
/* Working with the pointer and current size. */
#define DUK_BW_GET_PTR(thr,bw_ctx) \
((bw_ctx)->p)
#define DUK_BW_SET_PTR(thr,bw_ctx,ptr) do { \
(bw_ctx)->p = (ptr); \
} while (0)
#define DUK_BW_ADD_PTR(thr,bw_ctx,delta) do { \
(bw_ctx)->p += (delta); \
} while (0)
#define DUK_BW_GET_BASEPTR(thr,bw_ctx) \
((bw_ctx)->p_base)
#define DUK_BW_GET_LIMITPTR(thr,bw_ctx) \
((bw_ctx)->p_limit)
#define DUK_BW_GET_SIZE(thr,bw_ctx) \
((duk_size_t) ((bw_ctx)->p - (bw_ctx)->p_base))
#define DUK_BW_SET_SIZE(thr,bw_ctx,sz) do { \
DUK_ASSERT((duk_size_t) (sz) <= (duk_size_t) ((bw_ctx)->p - (bw_ctx)->p_base)); \
(bw_ctx)->p = (bw_ctx)->p_base + (sz); \
} while (0)
#define DUK_BW_RESET_SIZE(thr,bw_ctx) do { \
/* Reset to zero size, keep current limit. */ \
(bw_ctx)->p = (bw_ctx)->p_base; \
} while (0)
#define DUK_BW_GET_BUFFER(thr,bw_ctx) \
((bw_ctx)->buf)
/* Ensuring (reserving) space. */
#define DUK_BW_ENSURE(thr,bw_ctx,sz) do { \
duk_size_t duk__sz, duk__space; \
DUK_BW_ASSERT_VALID((thr), (bw_ctx)); \
duk__sz = (sz); \
duk__space = (duk_size_t) ((bw_ctx)->p_limit - (bw_ctx)->p); \
if (duk__space < duk__sz) { \
(void) duk_bw_resize((thr), (bw_ctx), duk__sz); \
} \
} while (0)
/* NOTE: Multiple evaluation of 'ptr' in this macro. */
/* XXX: Rework to use an always-inline function? */
#define DUK_BW_ENSURE_RAW(thr,bw_ctx,sz,ptr) \
(((duk_size_t) ((bw_ctx)->p_limit - (ptr)) >= (sz)) ? \
(ptr) : \
((bw_ctx)->p = (ptr), duk_bw_resize((thr),(bw_ctx),(sz))))
#define DUK_BW_ENSURE_GETPTR(thr,bw_ctx,sz) \
DUK_BW_ENSURE_RAW((thr), (bw_ctx), (sz), (bw_ctx)->p)
#define DUK_BW_ASSERT_SPACE_EXPR(thr,bw_ctx,sz) \
(DUK_BW_ASSERT_VALID_EXPR((thr), (bw_ctx)), \
DUK_ASSERT_EXPR((duk_size_t) ((bw_ctx)->p_limit - (bw_ctx)->p) >= (duk_size_t) (sz)))
#define DUK_BW_ASSERT_SPACE(thr,bw_ctx,sz) do { \
DUK_BW_ASSERT_SPACE_EXPR((thr), (bw_ctx), (sz)); \
} while (0)
/* Miscellaneous. */
#define DUK_BW_SETPTR_AND_COMPACT(thr,bw_ctx,ptr) do { \
(bw_ctx)->p = (ptr); \
duk_bw_compact((thr), (bw_ctx)); \
} while (0)
/* Fast write calls which assume you control the spare beforehand.
* Multibyte write variants exist and use a temporary write pointer
* because byte writes alias with anything: with a stored pointer
* explicit pointer load/stores get generated (e.g. gcc -Os).
*/
#define DUK_BW_WRITE_RAW_U8(thr,bw_ctx,val) do { \
DUK_BW_ASSERT_SPACE((thr), (bw_ctx), 1); \
*(bw_ctx)->p++ = (duk_uint8_t) (val); \
} while (0)
#define DUK_BW_WRITE_RAW_U8_2(thr,bw_ctx,val1,val2) do { \
duk_uint8_t *duk__p; \
DUK_BW_ASSERT_SPACE((thr), (bw_ctx), 2); \
duk__p = (bw_ctx)->p; \
*duk__p++ = (duk_uint8_t) (val1); \
*duk__p++ = (duk_uint8_t) (val2); \
(bw_ctx)->p = duk__p; \
} while (0)
#define DUK_BW_WRITE_RAW_U8_3(thr,bw_ctx,val1,val2,val3) do { \
duk_uint8_t *duk__p; \
DUK_BW_ASSERT_SPACE((thr), (bw_ctx), 3); \
duk__p = (bw_ctx)->p; \
*duk__p++ = (duk_uint8_t) (val1); \
*duk__p++ = (duk_uint8_t) (val2); \
*duk__p++ = (duk_uint8_t) (val3); \
(bw_ctx)->p = duk__p; \
} while (0)
#define DUK_BW_WRITE_RAW_U8_4(thr,bw_ctx,val1,val2,val3,val4) do { \
duk_uint8_t *duk__p; \
DUK_BW_ASSERT_SPACE((thr), (bw_ctx), 4); \
duk__p = (bw_ctx)->p; \
*duk__p++ = (duk_uint8_t) (val1); \
*duk__p++ = (duk_uint8_t) (val2); \
*duk__p++ = (duk_uint8_t) (val3); \
*duk__p++ = (duk_uint8_t) (val4); \
(bw_ctx)->p = duk__p; \
} while (0)
#define DUK_BW_WRITE_RAW_U8_5(thr,bw_ctx,val1,val2,val3,val4,val5) do { \
duk_uint8_t *duk__p; \
DUK_BW_ASSERT_SPACE((thr), (bw_ctx), 5); \
duk__p = (bw_ctx)->p; \
*duk__p++ = (duk_uint8_t) (val1); \
*duk__p++ = (duk_uint8_t) (val2); \
*duk__p++ = (duk_uint8_t) (val3); \
*duk__p++ = (duk_uint8_t) (val4); \
*duk__p++ = (duk_uint8_t) (val5); \
(bw_ctx)->p = duk__p; \
} while (0)
#define DUK_BW_WRITE_RAW_U8_6(thr,bw_ctx,val1,val2,val3,val4,val5,val6) do { \
duk_uint8_t *duk__p; \
DUK_BW_ASSERT_SPACE((thr), (bw_ctx), 6); \
duk__p = (bw_ctx)->p; \
*duk__p++ = (duk_uint8_t) (val1); \
*duk__p++ = (duk_uint8_t) (val2); \
*duk__p++ = (duk_uint8_t) (val3); \
*duk__p++ = (duk_uint8_t) (val4); \
*duk__p++ = (duk_uint8_t) (val5); \
*duk__p++ = (duk_uint8_t) (val6); \
(bw_ctx)->p = duk__p; \
} while (0)
#define DUK_BW_WRITE_RAW_XUTF8(thr,bw_ctx,cp) do { \
duk_ucodepoint_t duk__cp; \
duk_small_int_t duk__enc_len; \
duk__cp = (cp); \
DUK_BW_ASSERT_SPACE((thr), (bw_ctx), duk_unicode_get_xutf8_length(duk__cp)); \
duk__enc_len = duk_unicode_encode_xutf8(duk__cp, (bw_ctx)->p); \
(bw_ctx)->p += duk__enc_len; \
} while (0)
#define DUK_BW_WRITE_RAW_CESU8(thr,bw_ctx,cp) do { \
duk_ucodepoint_t duk__cp; \
duk_small_int_t duk__enc_len; \
duk__cp = (duk_ucodepoint_t) (cp); \
DUK_BW_ASSERT_SPACE((thr), (bw_ctx), duk_unicode_get_cesu8_length(duk__cp)); \
duk__enc_len = duk_unicode_encode_cesu8(duk__cp, (bw_ctx)->p); \
(bw_ctx)->p += duk__enc_len; \
} while (0)
/* XXX: add temporary duk__p pointer here too; sharing */
#define DUK_BW_WRITE_RAW_BYTES(thr,bw_ctx,valptr,valsz) do { \
const void *duk__valptr; \
duk_size_t duk__valsz; \
duk__valptr = (const void *) (valptr); \
duk__valsz = (duk_size_t) (valsz); \
DUK_MEMCPY((void *) ((bw_ctx)->p), duk__valptr, duk__valsz); \
(bw_ctx)->p += duk__valsz; \
} while (0)
#define DUK_BW_WRITE_RAW_CSTRING(thr,bw_ctx,val) do { \
const duk_uint8_t *duk__val; \
duk_size_t duk__val_len; \
duk__val = (const duk_uint8_t *) (val); \
duk__val_len = DUK_STRLEN((const char *) duk__val); \
DUK_MEMCPY((void *) ((bw_ctx)->p), (const void *) duk__val, duk__val_len); \
(bw_ctx)->p += duk__val_len; \
} while (0)
#define DUK_BW_WRITE_RAW_HSTRING(thr,bw_ctx,val) do { \
duk_size_t duk__val_len; \
duk__val_len = DUK_HSTRING_GET_BYTELEN((val)); \
DUK_MEMCPY((void *) ((bw_ctx)->p), (const void *) DUK_HSTRING_GET_DATA((val)), duk__val_len); \
(bw_ctx)->p += duk__val_len; \
} while (0)
#define DUK_BW_WRITE_RAW_HBUFFER(thr,bw_ctx,val) do { \
duk_size_t duk__val_len; \
duk__val_len = DUK_HBUFFER_GET_SIZE((val)); \
DUK_MEMCPY((void *) ((bw_ctx)->p), (const void *) DUK_HBUFFER_GET_DATA_PTR((thr)->heap, (val)), duk__val_len); \
(bw_ctx)->p += duk__val_len; \
} while (0)
#define DUK_BW_WRITE_RAW_HBUFFER_FIXED(thr,bw_ctx,val) do { \
duk_size_t duk__val_len; \
duk__val_len = DUK_HBUFFER_FIXED_GET_SIZE((val)); \
DUK_MEMCPY((void *) ((bw_ctx)->p), (const void *) DUK_HBUFFER_FIXED_GET_DATA_PTR((thr)->heap, (val)), duk__val_len); \
(bw_ctx)->p += duk__val_len; \
} while (0)
#define DUK_BW_WRITE_RAW_HBUFFER_DYNAMIC(thr,bw_ctx,val) do { \
duk_size_t duk__val_len; \
duk__val_len = DUK_HBUFFER_DYNAMIC_GET_SIZE((val)); \
DUK_MEMCPY((void *) ((bw_ctx)->p), (const void *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR((thr)->heap, (val)), duk__val_len); \
(bw_ctx)->p += duk__val_len; \
} while (0)
/* Append bytes from a slice already in the buffer. */
#define DUK_BW_WRITE_RAW_SLICE(thr,bw,dst_off,dst_len) \
duk_bw_write_raw_slice((thr), (bw), (dst_off), (dst_len))
/* Insert bytes in the middle of the buffer from an external buffer. */
#define DUK_BW_INSERT_RAW_BYTES(thr,bw,dst_off,buf,len) \
duk_bw_insert_raw_bytes((thr), (bw), (dst_off), (buf), (len))
/* Insert bytes in the middle of the buffer from a slice already
* in the buffer. Source offset is interpreted "before" the operation.
*/
#define DUK_BW_INSERT_RAW_SLICE(thr,bw,dst_off,src_off,len) \
duk_bw_insert_raw_slice((thr), (bw), (dst_off), (src_off), (len))
/* Insert a reserved area somewhere in the buffer; caller fills it.
* Evaluates to a (duk_uint_t *) pointing to the start of the reserved
* area for convenience.
*/
#define DUK_BW_INSERT_RAW_AREA(thr,bw,off,len) \
duk_bw_insert_raw_area((thr), (bw), (off), (len))
/* Remove a slice from inside buffer. */
#define DUK_BW_REMOVE_RAW_SLICE(thr,bw,off,len) \
duk_bw_remove_raw_slice((thr), (bw), (off), (len))
/* Safe write calls which will ensure space first. */
#define DUK_BW_WRITE_ENSURE_U8(thr,bw_ctx,val) do { \
DUK_BW_ENSURE((thr), (bw_ctx), 1); \
DUK_BW_WRITE_RAW_U8((thr), (bw_ctx), (val)); \
} while (0)
#define DUK_BW_WRITE_ENSURE_U8_2(thr,bw_ctx,val1,val2) do { \
DUK_BW_ENSURE((thr), (bw_ctx), 2); \
DUK_BW_WRITE_RAW_U8_2((thr), (bw_ctx), (val1), (val2)); \
} while (0)
#define DUK_BW_WRITE_ENSURE_U8_3(thr,bw_ctx,val1,val2,val3) do { \
DUK_BW_ENSURE((thr), (bw_ctx), 3); \
DUK_BW_WRITE_RAW_U8_3((thr), (bw_ctx), (val1), (val2), (val3)); \
} while (0)
#define DUK_BW_WRITE_ENSURE_U8_4(thr,bw_ctx,val1,val2,val3,val4) do { \
DUK_BW_ENSURE((thr), (bw_ctx), 4); \
DUK_BW_WRITE_RAW_U8_4((thr), (bw_ctx), (val1), (val2), (val3), (val4)); \
} while (0)
#define DUK_BW_WRITE_ENSURE_U8_5(thr,bw_ctx,val1,val2,val3,val4,val5) do { \
DUK_BW_ENSURE((thr), (bw_ctx), 5); \
DUK_BW_WRITE_RAW_U8_5((thr), (bw_ctx), (val1), (val2), (val3), (val4), (val5)); \
} while (0)
#define DUK_BW_WRITE_ENSURE_U8_6(thr,bw_ctx,val1,val2,val3,val4,val5,val6) do { \
DUK_BW_ENSURE((thr), (bw_ctx), 6); \
DUK_BW_WRITE_RAW_U8_6((thr), (bw_ctx), (val1), (val2), (val3), (val4), (val5), (val6)); \
} while (0)
#define DUK_BW_WRITE_ENSURE_XUTF8(thr,bw_ctx,cp) do { \
DUK_BW_ENSURE((thr), (bw_ctx), DUK_UNICODE_MAX_XUTF8_LENGTH); \
DUK_BW_WRITE_RAW_XUTF8((thr), (bw_ctx), (cp)); \
} while (0)
#define DUK_BW_WRITE_ENSURE_CESU8(thr,bw_ctx,cp) do { \
DUK_BW_ENSURE((thr), (bw_ctx), DUK_UNICODE_MAX_CESU8_LENGTH); \
DUK_BW_WRITE_RAW_CESU8((thr), (bw_ctx), (cp)); \
} while (0)
/* XXX: add temporary duk__p pointer here too; sharing */
#define DUK_BW_WRITE_ENSURE_BYTES(thr,bw_ctx,valptr,valsz) do { \
const void *duk__valptr; \
duk_size_t duk__valsz; \
duk__valptr = (const void *) (valptr); \
duk__valsz = (duk_size_t) (valsz); \
DUK_BW_ENSURE((thr), (bw_ctx), duk__valsz); \
DUK_MEMCPY((void *) ((bw_ctx)->p), duk__valptr, duk__valsz); \
(bw_ctx)->p += duk__valsz; \
} while (0)
#define DUK_BW_WRITE_ENSURE_CSTRING(thr,bw_ctx,val) do { \
const duk_uint8_t *duk__val; \
duk_size_t duk__val_len; \
duk__val = (const duk_uint8_t *) (val); \
duk__val_len = DUK_STRLEN((const char *) duk__val); \
DUK_BW_ENSURE((thr), (bw_ctx), duk__val_len); \
DUK_MEMCPY((void *) ((bw_ctx)->p), (const void *) duk__val, duk__val_len); \
(bw_ctx)->p += duk__val_len; \
} while (0)
#define DUK_BW_WRITE_ENSURE_HSTRING(thr,bw_ctx,val) do { \
duk_size_t duk__val_len; \
duk__val_len = DUK_HSTRING_GET_BYTELEN((val)); \
DUK_BW_ENSURE((thr), (bw_ctx), duk__val_len); \
DUK_MEMCPY((void *) ((bw_ctx)->p), (const void *) DUK_HSTRING_GET_DATA((val)), duk__val_len); \
(bw_ctx)->p += duk__val_len; \
} while (0)
#define DUK_BW_WRITE_ENSURE_HBUFFER(thr,bw_ctx,val) do { \
duk_size_t duk__val_len; \
duk__val_len = DUK_HBUFFER_GET_SIZE((val)); \
DUK_BW_ENSURE((thr), (bw_ctx), duk__val_len); \
DUK_MEMCPY((void *) ((bw_ctx)->p), (const void *) DUK_HBUFFER_GET_DATA_PTR((thr)->heap, (val)), duk__val_len); \
(bw_ctx)->p += duk__val_len; \
} while (0)
#define DUK_BW_WRITE_ENSURE_HBUFFER_FIXED(thr,bw_ctx,val) do { \
duk_size_t duk__val_len; \
duk__val_len = DUK_HBUFFER_FIXED_GET_SIZE((val)); \
DUK_BW_ENSURE((thr), (bw_ctx), duk__val_len); \
DUK_MEMCPY((void *) ((bw_ctx)->p), (const void *) DUK_HBUFFER_FIXED_GET_DATA_PTR((thr)->heap, (val)), duk__val_len); \
(bw_ctx)->p += duk__val_len; \
} while (0)
#define DUK_BW_WRITE_ENSURE_HBUFFER_DYNAMIC(thr,bw_ctx,val) do { \
duk_size_t duk__val_len; \
duk__val_len = DUK_HBUFFER_DYNAMIC_GET_SIZE((val)); \
DUK_BW_ENSURE((thr), (bw_ctx), duk__val_len); \
DUK_MEMCPY((void *) ((bw_ctx)->p), (const void *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR((thr)->heap, (val)), duk__val_len); \
(bw_ctx)->p += duk__val_len; \
} while (0)
#define DUK_BW_WRITE_ENSURE_SLICE(thr,bw,dst_off,dst_len) \
duk_bw_write_ensure_slice((thr), (bw), (dst_off), (dst_len))
#define DUK_BW_INSERT_ENSURE_BYTES(thr,bw,dst_off,buf,len) \
duk_bw_insert_ensure_bytes((thr), (bw), (dst_off), (buf), (len))
#define DUK_BW_INSERT_ENSURE_SLICE(thr,bw,dst_off,src_off,len) \
duk_bw_insert_ensure_slice((thr), (bw), (dst_off), (src_off), (len))
#define DUK_BW_INSERT_ENSURE_AREA(thr,bw,off,len) \
/* Evaluates to (duk_uint8_t *) pointing to start of area. */ \
duk_bw_insert_ensure_area((thr), (bw), (off), (len))
#define DUK_BW_REMOVE_ENSURE_SLICE(thr,bw,off,len) \
/* No difference between raw/ensure because the buffer shrinks. */ \
DUK_BW_REMOVE_RAW_SLICE((thr), (bw), (off), (len))
/*
* Externs and prototypes
*/
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL const duk_uint8_t duk_lc_digits[36];
DUK_INTERNAL_DECL const duk_uint8_t duk_uc_nybbles[16];
DUK_INTERNAL_DECL const duk_int8_t duk_hex_dectab[256];
#if defined(DUK_USE_HEX_FASTPATH)
DUK_INTERNAL_DECL const duk_int16_t duk_hex_dectab_shift4[256];
DUK_INTERNAL_DECL const duk_uint16_t duk_hex_enctab[256];
#endif
#if defined(DUK_USE_BASE64_FASTPATH)
DUK_INTERNAL_DECL const duk_uint8_t duk_base64_enctab[64];
DUK_INTERNAL_DECL const duk_int8_t duk_base64_dectab[256];
#endif
#endif /* !DUK_SINGLE_FILE */
/* Note: assumes that duk_util_probe_steps size is 32 */
#if defined(DUK_USE_HOBJECT_HASH_PART) || defined(DUK_USE_STRTAB_PROBE)
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL duk_uint8_t duk_util_probe_steps[32];
#endif /* !DUK_SINGLE_FILE */
#endif
#if defined(DUK_USE_STRHASH_DENSE)
DUK_INTERNAL_DECL duk_uint32_t duk_util_hashbytes(const duk_uint8_t *data, duk_size_t len, duk_uint32_t seed);
#endif
#if defined(DUK_USE_HOBJECT_HASH_PART) || defined(DUK_USE_STRTAB_PROBE)
DUK_INTERNAL_DECL duk_uint32_t duk_util_get_hash_prime(duk_uint32_t size);
#endif
DUK_INTERNAL_DECL duk_int32_t duk_bd_decode(duk_bitdecoder_ctx *ctx, duk_small_int_t bits);
DUK_INTERNAL_DECL duk_small_int_t duk_bd_decode_flag(duk_bitdecoder_ctx *ctx);
DUK_INTERNAL_DECL duk_int32_t duk_bd_decode_flagged(duk_bitdecoder_ctx *ctx, duk_small_int_t bits, duk_int32_t def_value);
DUK_INTERNAL_DECL void duk_be_encode(duk_bitencoder_ctx *ctx, duk_uint32_t data, duk_small_int_t bits);
DUK_INTERNAL_DECL void duk_be_finish(duk_bitencoder_ctx *ctx);
DUK_INTERNAL_DECL duk_uint32_t duk_util_tinyrandom_get_bits(duk_hthread *thr, duk_small_int_t n);
DUK_INTERNAL_DECL duk_double_t duk_util_tinyrandom_get_double(duk_hthread *thr);
DUK_INTERNAL_DECL void duk_bw_init(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx, duk_hbuffer_dynamic *h_buf);
DUK_INTERNAL_DECL void duk_bw_init_pushbuf(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx, duk_size_t buf_size);
DUK_INTERNAL_DECL duk_uint8_t *duk_bw_resize(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx, duk_size_t sz);
DUK_INTERNAL_DECL void duk_bw_compact(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx);
DUK_INTERNAL_DECL void duk_bw_write_raw_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t src_off, duk_size_t len);
DUK_INTERNAL_DECL void duk_bw_write_ensure_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t src_off, duk_size_t len);
DUK_INTERNAL_DECL void duk_bw_insert_raw_bytes(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t dst_off, const duk_uint8_t *buf, duk_size_t len);
DUK_INTERNAL_DECL void duk_bw_insert_ensure_bytes(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t dst_off, const duk_uint8_t *buf, duk_size_t len);
DUK_INTERNAL_DECL void duk_bw_insert_raw_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t dst_off, duk_size_t src_off, duk_size_t len);
DUK_INTERNAL_DECL void duk_bw_insert_ensure_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t dst_off, duk_size_t src_off, duk_size_t len);
DUK_INTERNAL_DECL duk_uint8_t *duk_bw_insert_raw_area(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t off, duk_size_t len);
DUK_INTERNAL_DECL duk_uint8_t *duk_bw_insert_ensure_area(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t off, duk_size_t len);
DUK_INTERNAL_DECL void duk_bw_remove_raw_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t off, duk_size_t len);
/* No duk_bw_remove_ensure_slice(), functionality would be identical. */
DUK_INTERNAL_DECL duk_uint16_t duk_raw_read_u16_be(duk_uint8_t **p);
DUK_INTERNAL_DECL duk_uint32_t duk_raw_read_u32_be(duk_uint8_t **p);
DUK_INTERNAL_DECL duk_double_t duk_raw_read_double_be(duk_uint8_t **p);
DUK_INTERNAL_DECL void duk_raw_write_u16_be(duk_uint8_t **p, duk_uint16_t val);
DUK_INTERNAL_DECL void duk_raw_write_u32_be(duk_uint8_t **p, duk_uint32_t val);
DUK_INTERNAL_DECL void duk_raw_write_double_be(duk_uint8_t **p, duk_double_t val);
#if defined(DUK_USE_DEBUGGER_SUPPORT) /* For now only needed by the debugger. */
DUK_INTERNAL void duk_byteswap_bytes(duk_uint8_t *p, duk_small_uint_t len);
#endif
#endif /* DUK_UTIL_H_INCLUDED */
#line 1 "duk_strings.h"
/*
* Shared error messages: declarations and macros
*
* Error messages are accessed through macros with fine-grained, explicit
* error message distinctions. Concrete error messages are selected by the
* macros and multiple macros can map to the same concrete string to save
* on code footprint. This allows flexible footprint/verbosity tuning with
* minimal code impact. There are a few limitations to this approach:
* (1) switching between plain messages and format strings doesn't work
* conveniently, and (2) conditional strings are a bit awkward to handle.
*
* Because format strings behave differently in the call site (they need to
* be followed by format arguments), they have a special prefix (DUK_STR_FMT_
* and duk_str_fmt_).
*
* On some compilers using explicit shared strings is preferable; on others
* it may be better to use straight literals because the compiler will combine
* them anyway, and such strings won't end up unnecessarily in a symbol table.
*/
#ifndef DUK_ERRMSG_H_INCLUDED
#define DUK_ERRMSG_H_INCLUDED
#define DUK_STR_INTERNAL_ERROR duk_str_internal_error
#define DUK_STR_INVALID_COUNT duk_str_invalid_count
#define DUK_STR_INVALID_CALL_ARGS duk_str_invalid_call_args
#define DUK_STR_NOT_CONSTRUCTABLE duk_str_not_constructable
#define DUK_STR_NOT_CALLABLE duk_str_not_callable
#define DUK_STR_NOT_EXTENSIBLE duk_str_not_extensible
#define DUK_STR_NOT_WRITABLE duk_str_not_writable
#define DUK_STR_NOT_CONFIGURABLE duk_str_not_configurable
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL const char *duk_str_internal_error;
DUK_INTERNAL_DECL const char *duk_str_invalid_count;
DUK_INTERNAL_DECL const char *duk_str_invalid_call_args;
DUK_INTERNAL_DECL const char *duk_str_not_constructable;
DUK_INTERNAL_DECL const char *duk_str_not_callable;
DUK_INTERNAL_DECL const char *duk_str_not_extensible;
DUK_INTERNAL_DECL const char *duk_str_not_writable;
DUK_INTERNAL_DECL const char *duk_str_not_configurable;
#endif /* !DUK_SINGLE_FILE */
#define DUK_STR_INVALID_CONTEXT duk_str_invalid_context
#define DUK_STR_INVALID_INDEX duk_str_invalid_call_args
#define DUK_STR_PUSH_BEYOND_ALLOC_STACK duk_str_push_beyond_alloc_stack
#define DUK_STR_NOT_UNDEFINED duk_str_unexpected_type
#define DUK_STR_NOT_NULL duk_str_unexpected_type
#define DUK_STR_NOT_BOOLEAN duk_str_unexpected_type
#define DUK_STR_NOT_NUMBER duk_str_unexpected_type
#define DUK_STR_NOT_STRING duk_str_unexpected_type
#define DUK_STR_NOT_OBJECT duk_str_unexpected_type
#define DUK_STR_NOT_POINTER duk_str_unexpected_type
#define DUK_STR_NOT_BUFFER duk_str_not_buffer /* still in use with verbose messages */
#define DUK_STR_UNEXPECTED_TYPE duk_str_unexpected_type
#define DUK_STR_NOT_THREAD duk_str_unexpected_type
#define DUK_STR_NOT_COMPILEDFUNCTION duk_str_unexpected_type
#define DUK_STR_NOT_NATIVEFUNCTION duk_str_unexpected_type
#define DUK_STR_NOT_C_FUNCTION duk_str_unexpected_type
#define DUK_STR_NOT_FUNCTION duk_str_unexpected_type
#define DUK_STR_NOT_REGEXP duk_str_unexpected_type
#define DUK_STR_DEFAULTVALUE_COERCE_FAILED duk_str_defaultvalue_coerce_failed
#define DUK_STR_NUMBER_OUTSIDE_RANGE duk_str_number_outside_range
#define DUK_STR_NOT_OBJECT_COERCIBLE duk_str_not_object_coercible
#define DUK_STR_STRING_TOO_LONG duk_str_string_too_long
#define DUK_STR_BUFFER_TOO_LONG duk_str_buffer_too_long
#define DUK_STR_SPRINTF_TOO_LONG duk_str_sprintf_too_long
#define DUK_STR_ALLOC_FAILED duk_str_alloc_failed
#define DUK_STR_POP_TOO_MANY duk_str_pop_too_many
#define DUK_STR_WRONG_BUFFER_TYPE duk_str_wrong_buffer_type
#define DUK_STR_ENCODE_FAILED duk_str_encode_failed
#define DUK_STR_DECODE_FAILED duk_str_decode_failed
#define DUK_STR_NO_SOURCECODE duk_str_no_sourcecode
#define DUK_STR_CONCAT_RESULT_TOO_LONG duk_str_concat_result_too_long
#define DUK_STR_UNIMPLEMENTED duk_str_unimplemented
#define DUK_STR_UNSUPPORTED duk_str_unsupported
#define DUK_STR_ARRAY_LENGTH_OVER_2G duk_str_array_length_over_2g
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL const char *duk_str_invalid_context;
DUK_INTERNAL_DECL const char *duk_str_push_beyond_alloc_stack;
DUK_INTERNAL_DECL const char *duk_str_not_buffer;
DUK_INTERNAL_DECL const char *duk_str_unexpected_type;
DUK_INTERNAL_DECL const char *duk_str_defaultvalue_coerce_failed;
DUK_INTERNAL_DECL const char *duk_str_number_outside_range;
DUK_INTERNAL_DECL const char *duk_str_not_object_coercible;
DUK_INTERNAL_DECL const char *duk_str_string_too_long;
DUK_INTERNAL_DECL const char *duk_str_buffer_too_long;
DUK_INTERNAL_DECL const char *duk_str_sprintf_too_long;
DUK_INTERNAL_DECL const char *duk_str_alloc_failed;
DUK_INTERNAL_DECL const char *duk_str_pop_too_many;
DUK_INTERNAL_DECL const char *duk_str_wrong_buffer_type;
DUK_INTERNAL_DECL const char *duk_str_encode_failed;
DUK_INTERNAL_DECL const char *duk_str_decode_failed;
DUK_INTERNAL_DECL const char *duk_str_no_sourcecode;
DUK_INTERNAL_DECL const char *duk_str_concat_result_too_long;
DUK_INTERNAL_DECL const char *duk_str_unimplemented;
DUK_INTERNAL_DECL const char *duk_str_unsupported;
DUK_INTERNAL_DECL const char *duk_str_array_length_over_2g;
#endif /* !DUK_SINGLE_FILE */
#define DUK_STR_FMT_PTR duk_str_fmt_ptr
#define DUK_STR_FMT_INVALID_JSON duk_str_fmt_invalid_json
#define DUK_STR_JSONDEC_RECLIMIT duk_str_jsondec_reclimit
#define DUK_STR_JSONENC_RECLIMIT duk_str_jsonenc_reclimit
#define DUK_STR_CYCLIC_INPUT duk_str_cyclic_input
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL const char *duk_str_fmt_ptr;
DUK_INTERNAL_DECL const char *duk_str_fmt_invalid_json;
DUK_INTERNAL_DECL const char *duk_str_jsondec_reclimit;
DUK_INTERNAL_DECL const char *duk_str_jsonenc_reclimit;
DUK_INTERNAL_DECL const char *duk_str_cyclic_input;
#endif /* !DUK_SINGLE_FILE */
#define DUK_STR_PROXY_REVOKED duk_str_proxy_revoked
#define DUK_STR_INVALID_BASE duk_str_invalid_base
#define DUK_STR_STRICT_CALLER_READ duk_str_strict_caller_read
#define DUK_STR_PROXY_REJECTED duk_str_proxy_rejected
#define DUK_STR_INVALID_ARRAY_LENGTH duk_str_invalid_array_length
#define DUK_STR_ARRAY_LENGTH_WRITE_FAILED duk_str_array_length_write_failed
#define DUK_STR_ARRAY_LENGTH_NOT_WRITABLE duk_str_array_length_not_writable
#define DUK_STR_SETTER_UNDEFINED duk_str_setter_undefined
#define DUK_STR_REDEFINE_VIRT_PROP duk_str_redefine_virt_prop
#define DUK_STR_INVALID_DESCRIPTOR duk_str_invalid_descriptor
#define DUK_STR_PROPERTY_IS_VIRTUAL duk_str_property_is_virtual
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL const char *duk_str_proxy_revoked;
DUK_INTERNAL_DECL const char *duk_str_invalid_base;
DUK_INTERNAL_DECL const char *duk_str_strict_caller_read;
DUK_INTERNAL_DECL const char *duk_str_proxy_rejected;
DUK_INTERNAL_DECL const char *duk_str_invalid_array_length;
DUK_INTERNAL_DECL const char *duk_str_array_length_write_failed;
DUK_INTERNAL_DECL const char *duk_str_array_length_not_writable;
DUK_INTERNAL_DECL const char *duk_str_setter_undefined;
DUK_INTERNAL_DECL const char *duk_str_redefine_virt_prop;
DUK_INTERNAL_DECL const char *duk_str_invalid_descriptor;
DUK_INTERNAL_DECL const char *duk_str_property_is_virtual;
#endif /* !DUK_SINGLE_FILE */
#define DUK_STR_PARSE_ERROR duk_str_parse_error
#define DUK_STR_DUPLICATE_LABEL duk_str_duplicate_label
#define DUK_STR_INVALID_LABEL duk_str_invalid_label
#define DUK_STR_INVALID_ARRAY_LITERAL duk_str_invalid_array_literal
#define DUK_STR_INVALID_OBJECT_LITERAL duk_str_invalid_object_literal
#define DUK_STR_INVALID_VAR_DECLARATION duk_str_invalid_var_declaration
#define DUK_STR_CANNOT_DELETE_IDENTIFIER duk_str_cannot_delete_identifier
#define DUK_STR_INVALID_EXPRESSION duk_str_invalid_expression
#define DUK_STR_INVALID_LVALUE duk_str_invalid_lvalue
#define DUK_STR_EXPECTED_IDENTIFIER duk_str_expected_identifier
#define DUK_STR_EMPTY_EXPR_NOT_ALLOWED duk_str_empty_expr_not_allowed
#define DUK_STR_INVALID_FOR duk_str_invalid_for
#define DUK_STR_INVALID_SWITCH duk_str_invalid_switch
#define DUK_STR_INVALID_BREAK_CONT_LABEL duk_str_invalid_break_cont_label
#define DUK_STR_INVALID_RETURN duk_str_invalid_return
#define DUK_STR_INVALID_TRY duk_str_invalid_try
#define DUK_STR_INVALID_THROW duk_str_invalid_throw
#define DUK_STR_WITH_IN_STRICT_MODE duk_str_with_in_strict_mode
#define DUK_STR_FUNC_STMT_NOT_ALLOWED duk_str_func_stmt_not_allowed
#define DUK_STR_UNTERMINATED_STMT duk_str_unterminated_stmt
#define DUK_STR_INVALID_ARG_NAME duk_str_invalid_arg_name
#define DUK_STR_INVALID_FUNC_NAME duk_str_invalid_func_name
#define DUK_STR_INVALID_GETSET_NAME duk_str_invalid_getset_name
#define DUK_STR_FUNC_NAME_REQUIRED duk_str_func_name_required
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL const char *duk_str_parse_error;
DUK_INTERNAL_DECL const char *duk_str_duplicate_label;
DUK_INTERNAL_DECL const char *duk_str_invalid_label;
DUK_INTERNAL_DECL const char *duk_str_invalid_array_literal;
DUK_INTERNAL_DECL const char *duk_str_invalid_object_literal;
DUK_INTERNAL_DECL const char *duk_str_invalid_var_declaration;
DUK_INTERNAL_DECL const char *duk_str_cannot_delete_identifier;
DUK_INTERNAL_DECL const char *duk_str_invalid_expression;
DUK_INTERNAL_DECL const char *duk_str_invalid_lvalue;
DUK_INTERNAL_DECL const char *duk_str_expected_identifier;
DUK_INTERNAL_DECL const char *duk_str_empty_expr_not_allowed;
DUK_INTERNAL_DECL const char *duk_str_invalid_for;
DUK_INTERNAL_DECL const char *duk_str_invalid_switch;
DUK_INTERNAL_DECL const char *duk_str_invalid_break_cont_label;
DUK_INTERNAL_DECL const char *duk_str_invalid_return;
DUK_INTERNAL_DECL const char *duk_str_invalid_try;
DUK_INTERNAL_DECL const char *duk_str_invalid_throw;
DUK_INTERNAL_DECL const char *duk_str_with_in_strict_mode;
DUK_INTERNAL_DECL const char *duk_str_func_stmt_not_allowed;
DUK_INTERNAL_DECL const char *duk_str_unterminated_stmt;
DUK_INTERNAL_DECL const char *duk_str_invalid_arg_name;
DUK_INTERNAL_DECL const char *duk_str_invalid_func_name;
DUK_INTERNAL_DECL const char *duk_str_invalid_getset_name;
DUK_INTERNAL_DECL const char *duk_str_func_name_required;
#endif /* !DUK_SINGLE_FILE */
#define DUK_STR_INVALID_QUANTIFIER_NO_ATOM duk_str_invalid_quantifier_no_atom
#define DUK_STR_INVALID_QUANTIFIER_VALUES duk_str_invalid_quantifier_values
#define DUK_STR_QUANTIFIER_TOO_MANY_COPIES duk_str_quantifier_too_many_copies
#define DUK_STR_UNEXPECTED_CLOSING_PAREN duk_str_unexpected_closing_paren
#define DUK_STR_UNEXPECTED_END_OF_PATTERN duk_str_unexpected_end_of_pattern
#define DUK_STR_UNEXPECTED_REGEXP_TOKEN duk_str_unexpected_regexp_token
#define DUK_STR_INVALID_REGEXP_FLAGS duk_str_invalid_regexp_flags
#define DUK_STR_INVALID_BACKREFS duk_str_invalid_backrefs
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL const char *duk_str_invalid_quantifier_no_atom;
DUK_INTERNAL_DECL const char *duk_str_invalid_quantifier_values;
DUK_INTERNAL_DECL const char *duk_str_quantifier_too_many_copies;
DUK_INTERNAL_DECL const char *duk_str_unexpected_closing_paren;
DUK_INTERNAL_DECL const char *duk_str_unexpected_end_of_pattern;
DUK_INTERNAL_DECL const char *duk_str_unexpected_regexp_token;
DUK_INTERNAL_DECL const char *duk_str_invalid_regexp_flags;
DUK_INTERNAL_DECL const char *duk_str_invalid_backrefs;
#endif /* !DUK_SINGLE_FILE */
#define DUK_STR_VALSTACK_LIMIT duk_str_valstack_limit
#define DUK_STR_CALLSTACK_LIMIT duk_str_callstack_limit
#define DUK_STR_CATCHSTACK_LIMIT duk_str_catchstack_limit
#define DUK_STR_PROTOTYPE_CHAIN_LIMIT duk_str_prototype_chain_limit
#define DUK_STR_BOUND_CHAIN_LIMIT duk_str_bound_chain_limit
#define DUK_STR_C_CALLSTACK_LIMIT duk_str_c_callstack_limit
#define DUK_STR_COMPILER_RECURSION_LIMIT duk_str_compiler_recursion_limit
#define DUK_STR_BYTECODE_LIMIT duk_str_bytecode_limit
#define DUK_STR_REG_LIMIT duk_str_reg_limit
#define DUK_STR_TEMP_LIMIT duk_str_temp_limit
#define DUK_STR_CONST_LIMIT duk_str_const_limit
#define DUK_STR_FUNC_LIMIT duk_str_func_limit
#define DUK_STR_REGEXP_COMPILER_RECURSION_LIMIT duk_str_regexp_compiler_recursion_limit
#define DUK_STR_REGEXP_EXECUTOR_RECURSION_LIMIT duk_str_regexp_executor_recursion_limit
#define DUK_STR_REGEXP_EXECUTOR_STEP_LIMIT duk_str_regexp_executor_step_limit
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL const char *duk_str_valstack_limit;
DUK_INTERNAL_DECL const char *duk_str_callstack_limit;
DUK_INTERNAL_DECL const char *duk_str_catchstack_limit;
DUK_INTERNAL_DECL const char *duk_str_prototype_chain_limit;
DUK_INTERNAL_DECL const char *duk_str_bound_chain_limit;
DUK_INTERNAL_DECL const char *duk_str_c_callstack_limit;
DUK_INTERNAL_DECL const char *duk_str_compiler_recursion_limit;
DUK_INTERNAL_DECL const char *duk_str_bytecode_limit;
DUK_INTERNAL_DECL const char *duk_str_reg_limit;
DUK_INTERNAL_DECL const char *duk_str_temp_limit;
DUK_INTERNAL_DECL const char *duk_str_const_limit;
DUK_INTERNAL_DECL const char *duk_str_func_limit;
DUK_INTERNAL_DECL const char *duk_str_regexp_compiler_recursion_limit;
DUK_INTERNAL_DECL const char *duk_str_regexp_executor_recursion_limit;
DUK_INTERNAL_DECL const char *duk_str_regexp_executor_step_limit;
#endif /* !DUK_SINGLE_FILE */
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL const char *duk_str_anon;
#endif /* !DUK_SINGLE_FILE */
#endif /* DUK_ERRMSG_H_INCLUDED */
#line 1 "duk_js_bytecode.h"
/*
* Ecmascript bytecode
*/
#ifndef DUK_JS_BYTECODE_H_INCLUDED
#define DUK_JS_BYTECODE_H_INCLUDED
/*
* Logical instruction layout
* ==========================
*
* !3!3!2!2!2!2!2!2!2!2!2!2!1!1!1!1!1!1!1!1!1!1! ! ! ! ! ! ! ! ! ! !
* !1!0!9!8!7!6!5!4!3!2!1!0!9!8!7!6!5!4!3!2!1!0!9!8!7!6!5!4!3!2!1!0!
* +---------------------------------------------------+-----------+
* ! C ! B ! A ! OP !
* +---------------------------------------------------+-----------+
*
* OP (6 bits): opcode (DUK_OP_*), access should be fastest
* A (8 bits): typically a target register number
* B (9 bits): typically first source register/constant number
* C (9 bits): typically second source register/constant number
*
* Some instructions combine BC or ABC together for larger parameter values.
* Signed integers (e.g. jump offsets) are encoded as unsigned, with an opcode
* specific bias. B and C may denote a register or a constant, see
* DUK_BC_ISREG() and DUK_BC_ISCONST().
*
* Note: macro naming is a bit misleading, e.g. "ABC" in macro name but
* the field layout is logically "CBA".
*/
typedef duk_uint32_t duk_instr_t;
#define DUK_DEC_OP(x) ((x) & 0x3fUL)
#define DUK_DEC_A(x) (((x) >> 6) & 0xffUL)
#define DUK_DEC_B(x) (((x) >> 14) & 0x1ffUL)
#define DUK_DEC_C(x) (((x) >> 23) & 0x1ffUL)
#define DUK_DEC_BC(x) (((x) >> 14) & 0x3ffffUL)
#define DUK_DEC_ABC(x) (((x) >> 6) & 0x3ffffffUL)
#define DUK_ENC_OP(op) ((duk_instr_t) (op))
#define DUK_ENC_OP_ABC(op,abc) ((duk_instr_t) ( \
(((duk_instr_t) (abc)) << 6) | \
((duk_instr_t) (op)) \
))
#define DUK_ENC_OP_A_BC(op,a,bc) ((duk_instr_t) ( \
(((duk_instr_t) (bc)) << 14) | \
(((duk_instr_t) (a)) << 6) | \
((duk_instr_t) (op)) \
))
#define DUK_ENC_OP_A_B_C(op,a,b,c) ((duk_instr_t) ( \
(((duk_instr_t) (c)) << 23) | \
(((duk_instr_t) (b)) << 14) | \
(((duk_instr_t) (a)) << 6) | \
((duk_instr_t) (op)) \
))
#define DUK_ENC_OP_A_B(op,a,b) DUK_ENC_OP_A_B_C(op,a,b,0)
#define DUK_ENC_OP_A(op,a) DUK_ENC_OP_A_B_C(op,a,0,0)
/* Constants should be signed so that signed arithmetic involving them
* won't cause values to be coerced accidentally to unsigned.
*/
#define DUK_BC_OP_MIN 0
#define DUK_BC_OP_MAX 0x3fL
#define DUK_BC_A_MIN 0
#define DUK_BC_A_MAX 0xffL
#define DUK_BC_B_MIN 0
#define DUK_BC_B_MAX 0x1ffL
#define DUK_BC_C_MIN 0
#define DUK_BC_C_MAX 0x1ffL
#define DUK_BC_BC_MIN 0
#define DUK_BC_BC_MAX 0x3ffffL
#define DUK_BC_ABC_MIN 0
#define DUK_BC_ABC_MAX 0x3ffffffL
#define DUK_BC_EXTRAOP_MIN DUK_BC_A_MIN
#define DUK_BC_EXTRAOP_MAX DUK_BC_A_MAX
#define DUK_OP_LDREG 0
#define DUK_OP_STREG 1
#define DUK_OP_LDCONST 2
#define DUK_OP_LDINT 3
#define DUK_OP_LDINTX 4
#define DUK_OP_MPUTOBJ 5
#define DUK_OP_MPUTOBJI 6
#define DUK_OP_MPUTARR 7
#define DUK_OP_MPUTARRI 8
#define DUK_OP_NEW 9
#define DUK_OP_NEWI 10
#define DUK_OP_REGEXP 11
#define DUK_OP_CSREG 12
#define DUK_OP_CSREGI 13
#define DUK_OP_GETVAR 14
#define DUK_OP_PUTVAR 15
#define DUK_OP_DECLVAR 16
#define DUK_OP_DELVAR 17
#define DUK_OP_CSVAR 18
#define DUK_OP_CSVARI 19
#define DUK_OP_CLOSURE 20
#define DUK_OP_GETPROP 21
#define DUK_OP_PUTPROP 22
#define DUK_OP_DELPROP 23
#define DUK_OP_CSPROP 24
#define DUK_OP_CSPROPI 25
#define DUK_OP_ADD 26
#define DUK_OP_SUB 27
#define DUK_OP_MUL 28
#define DUK_OP_DIV 29
#define DUK_OP_MOD 30
#define DUK_OP_BAND 31
#define DUK_OP_BOR 32
#define DUK_OP_BXOR 33
#define DUK_OP_BASL 34
#define DUK_OP_BLSR 35
#define DUK_OP_BASR 36
#define DUK_OP_EQ 37
#define DUK_OP_NEQ 38
#define DUK_OP_SEQ 39
#define DUK_OP_SNEQ 40
#define DUK_OP_GT 41
#define DUK_OP_GE 42
#define DUK_OP_LT 43
#define DUK_OP_LE 44
#define DUK_OP_IF 45
#define DUK_OP_JUMP 46
#define DUK_OP_RETURN 47
#define DUK_OP_CALL 48
#define DUK_OP_CALLI 49
#define DUK_OP_TRYCATCH 50
#define DUK_OP_EXTRA 51
#define DUK_OP_PREINCR 52 /* pre/post opcode values have constraints, */
#define DUK_OP_PREDECR 53 /* see duk_js_executor.c */
#define DUK_OP_POSTINCR 54
#define DUK_OP_POSTDECR 55
#define DUK_OP_PREINCV 56
#define DUK_OP_PREDECV 57
#define DUK_OP_POSTINCV 58
#define DUK_OP_POSTDECV 59
#define DUK_OP_PREINCP 60
#define DUK_OP_PREDECP 61
#define DUK_OP_POSTINCP 62
#define DUK_OP_POSTDECP 63
#define DUK_OP_NONE 64 /* dummy value used as marker */
/* DUK_OP_EXTRA, sub-operation in A */
#define DUK_EXTRAOP_NOP 0
#define DUK_EXTRAOP_INVALID 1
#define DUK_EXTRAOP_LDTHIS 2
#define DUK_EXTRAOP_LDUNDEF 3
#define DUK_EXTRAOP_LDNULL 4
#define DUK_EXTRAOP_LDTRUE 5
#define DUK_EXTRAOP_LDFALSE 6
#define DUK_EXTRAOP_NEWOBJ 7
#define DUK_EXTRAOP_NEWARR 8
#define DUK_EXTRAOP_SETALEN 9
#define DUK_EXTRAOP_TYPEOF 10
#define DUK_EXTRAOP_TYPEOFID 11
#define DUK_EXTRAOP_INITENUM 12
#define DUK_EXTRAOP_NEXTENUM 13
#define DUK_EXTRAOP_INITSET 14
#define DUK_EXTRAOP_INITSETI 15
#define DUK_EXTRAOP_INITGET 16
#define DUK_EXTRAOP_INITGETI 17
#define DUK_EXTRAOP_ENDTRY 18
#define DUK_EXTRAOP_ENDCATCH 19
#define DUK_EXTRAOP_ENDFIN 20
#define DUK_EXTRAOP_THROW 21
#define DUK_EXTRAOP_INVLHS 22
#define DUK_EXTRAOP_UNM 23
#define DUK_EXTRAOP_UNP 24
#define DUK_EXTRAOP_DEBUGGER 25
#define DUK_EXTRAOP_BREAK 26
#define DUK_EXTRAOP_CONTINUE 27
#define DUK_EXTRAOP_BNOT 28
#define DUK_EXTRAOP_LNOT 29
#define DUK_EXTRAOP_INSTOF 30
#define DUK_EXTRAOP_IN 31
#define DUK_EXTRAOP_LABEL 32
#define DUK_EXTRAOP_ENDLABEL 33
/* DUK_OP_CALL flags in A */
#define DUK_BC_CALL_FLAG_TAILCALL (1 << 0)
#define DUK_BC_CALL_FLAG_EVALCALL (1 << 1)
/* DUK_OP_TRYCATCH flags in A */
#define DUK_BC_TRYCATCH_FLAG_HAVE_CATCH (1 << 0)
#define DUK_BC_TRYCATCH_FLAG_HAVE_FINALLY (1 << 1)
#define DUK_BC_TRYCATCH_FLAG_CATCH_BINDING (1 << 2)
#define DUK_BC_TRYCATCH_FLAG_WITH_BINDING (1 << 3)
/* DUK_OP_RETURN flags in A */
#define DUK_BC_RETURN_FLAG_HAVE_RETVAL (1 << 0)
/* DUK_OP_DECLVAR flags in A; bottom bits are reserved for propdesc flags (DUK_PROPDESC_FLAG_XXX) */
#define DUK_BC_DECLVAR_FLAG_UNDEF_VALUE (1 << 4) /* use 'undefined' for value automatically */
#define DUK_BC_DECLVAR_FLAG_FUNC_DECL (1 << 5) /* function declaration */
/* misc constants and helper macros */
#define DUK_BC_REGLIMIT 256 /* if B/C is >= this value, refers to a const */
#define DUK_BC_ISREG(x) ((x) < DUK_BC_REGLIMIT)
#define DUK_BC_ISCONST(x) ((x) >= DUK_BC_REGLIMIT)
#define DUK_BC_LDINT_BIAS (1L << 17)
#define DUK_BC_LDINTX_SHIFT 18
#define DUK_BC_JUMP_BIAS (1L << 25)
#endif /* DUK_JS_BYTECODE_H_INCLUDED */
#line 1 "duk_lexer.h"
/*
* Lexer defines.
*/
#ifndef DUK_LEXER_H_INCLUDED
#define DUK_LEXER_H_INCLUDED
typedef void (*duk_re_range_callback)(void *user, duk_codepoint_t r1, duk_codepoint_t r2, duk_bool_t direct);
/*
* A token is interpreted as any possible production of InputElementDiv
* and InputElementRegExp, see E5 Section 7 in its entirety. Note that
* the E5 "Token" production does not cover all actual tokens of the
* language (which is explicitly stated in the specification, Section 7.5).
* Null and boolean literals are defined as part of both ReservedWord
* (E5 Section 7.6.1) and Literal (E5 Section 7.8) productions. Here,
* null and boolean values have literal tokens, and are not reserved
* words.
*
* Decimal literal negative/positive sign is -not- part of DUK_TOK_NUMBER.
* The number tokens always have a non-negative value. The unary minus
* operator in "-1.0" is optimized during compilation to yield a single
* negative constant.
*
* Token numbering is free except that reserved words are required to be
* in a continuous range and in a particular order. See genstrings.py.
*/
#define DUK_LEXER_INITCTX(ctx) duk_lexer_initctx((ctx))
#define DUK_LEXER_SETPOINT(ctx,pt) duk_lexer_setpoint((ctx), (pt))
#define DUK_LEXER_GETPOINT(ctx,pt) do { (pt)->offset = (ctx)->window[0].offset; \
(pt)->line = (ctx)->window[0].line; } while (0)
/* currently 6 characters of lookup are actually needed (duk_lexer.c) */
#define DUK_LEXER_WINDOW_SIZE 6
#if defined(DUK_USE_LEXER_SLIDING_WINDOW)
#define DUK_LEXER_BUFFER_SIZE 64
#endif
#define DUK_TOK_MINVAL 0
/* returned after EOF (infinite amount) */
#define DUK_TOK_EOF 0
/* identifier names (E5 Section 7.6) */
#define DUK_TOK_IDENTIFIER 1
/* reserved words: keywords */
#define DUK_TOK_START_RESERVED 2
#define DUK_TOK_BREAK 2
#define DUK_TOK_CASE 3
#define DUK_TOK_CATCH 4
#define DUK_TOK_CONTINUE 5
#define DUK_TOK_DEBUGGER 6
#define DUK_TOK_DEFAULT 7
#define DUK_TOK_DELETE 8
#define DUK_TOK_DO 9
#define DUK_TOK_ELSE 10
#define DUK_TOK_FINALLY 11
#define DUK_TOK_FOR 12
#define DUK_TOK_FUNCTION 13
#define DUK_TOK_IF 14
#define DUK_TOK_IN 15
#define DUK_TOK_INSTANCEOF 16
#define DUK_TOK_NEW 17
#define DUK_TOK_RETURN 18
#define DUK_TOK_SWITCH 19
#define DUK_TOK_THIS 20
#define DUK_TOK_THROW 21
#define DUK_TOK_TRY 22
#define DUK_TOK_TYPEOF 23
#define DUK_TOK_VAR 24
#define DUK_TOK_CONST 25
#define DUK_TOK_VOID 26
#define DUK_TOK_WHILE 27
#define DUK_TOK_WITH 28
/* reserved words: future reserved words */
#define DUK_TOK_CLASS 29
#define DUK_TOK_ENUM 30
#define DUK_TOK_EXPORT 31
#define DUK_TOK_EXTENDS 32
#define DUK_TOK_IMPORT 33
#define DUK_TOK_SUPER 34
/* "null", "true", and "false" are always reserved words.
* Note that "get" and "set" are not!
*/
#define DUK_TOK_NULL 35
#define DUK_TOK_TRUE 36
#define DUK_TOK_FALSE 37
/* reserved words: additional future reserved words in strict mode */
#define DUK_TOK_START_STRICT_RESERVED 38 /* inclusive */
#define DUK_TOK_IMPLEMENTS 38
#define DUK_TOK_INTERFACE 39
#define DUK_TOK_LET 40
#define DUK_TOK_PACKAGE 41
#define DUK_TOK_PRIVATE 42
#define DUK_TOK_PROTECTED 43
#define DUK_TOK_PUBLIC 44
#define DUK_TOK_STATIC 45
#define DUK_TOK_YIELD 46
#define DUK_TOK_END_RESERVED 47 /* exclusive */
/* "get" and "set" are tokens but NOT ReservedWords. They are currently
* parsed and identifiers and these defines are actually now unused.
*/
#define DUK_TOK_GET 47
#define DUK_TOK_SET 48
/* punctuators (unlike the spec, also includes "/" and "/=") */
#define DUK_TOK_LCURLY 49
#define DUK_TOK_RCURLY 50
#define DUK_TOK_LBRACKET 51
#define DUK_TOK_RBRACKET 52
#define DUK_TOK_LPAREN 53
#define DUK_TOK_RPAREN 54
#define DUK_TOK_PERIOD 55
#define DUK_TOK_SEMICOLON 56
#define DUK_TOK_COMMA 57
#define DUK_TOK_LT 58
#define DUK_TOK_GT 59
#define DUK_TOK_LE 60
#define DUK_TOK_GE 61
#define DUK_TOK_EQ 62
#define DUK_TOK_NEQ 63
#define DUK_TOK_SEQ 64
#define DUK_TOK_SNEQ 65
#define DUK_TOK_ADD 66
#define DUK_TOK_SUB 67
#define DUK_TOK_MUL 68
#define DUK_TOK_DIV 69
#define DUK_TOK_MOD 70
#define DUK_TOK_INCREMENT 71
#define DUK_TOK_DECREMENT 72
#define DUK_TOK_ALSHIFT 73 /* named "arithmetic" because result is signed */
#define DUK_TOK_ARSHIFT 74
#define DUK_TOK_RSHIFT 75
#define DUK_TOK_BAND 76
#define DUK_TOK_BOR 77
#define DUK_TOK_BXOR 78
#define DUK_TOK_LNOT 79
#define DUK_TOK_BNOT 80
#define DUK_TOK_LAND 81
#define DUK_TOK_LOR 82
#define DUK_TOK_QUESTION 83
#define DUK_TOK_COLON 84
#define DUK_TOK_EQUALSIGN 85
#define DUK_TOK_ADD_EQ 86
#define DUK_TOK_SUB_EQ 87
#define DUK_TOK_MUL_EQ 88
#define DUK_TOK_DIV_EQ 89
#define DUK_TOK_MOD_EQ 90
#define DUK_TOK_ALSHIFT_EQ 91
#define DUK_TOK_ARSHIFT_EQ 92
#define DUK_TOK_RSHIFT_EQ 93
#define DUK_TOK_BAND_EQ 94
#define DUK_TOK_BOR_EQ 95
#define DUK_TOK_BXOR_EQ 96
/* literals (E5 Section 7.8), except null, true, false, which are treated
* like reserved words (above).
*/
#define DUK_TOK_NUMBER 97
#define DUK_TOK_STRING 98
#define DUK_TOK_REGEXP 99
#define DUK_TOK_MAXVAL 99 /* inclusive */
/* Convert heap string index to a token (reserved words) */
#define DUK_STRIDX_TO_TOK(x) ((x) - DUK_STRIDX_START_RESERVED + DUK_TOK_START_RESERVED)
/* Sanity check */
#if (DUK_TOK_MAXVAL > 255)
#error DUK_TOK_MAXVAL too large, code assumes it fits into 8 bits
#endif
/* Sanity checks for string and token defines */
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_BREAK) != DUK_TOK_BREAK)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_CASE) != DUK_TOK_CASE)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_CATCH) != DUK_TOK_CATCH)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_CONTINUE) != DUK_TOK_CONTINUE)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_DEBUGGER) != DUK_TOK_DEBUGGER)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_DEFAULT) != DUK_TOK_DEFAULT)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_DELETE) != DUK_TOK_DELETE)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_DO) != DUK_TOK_DO)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_ELSE) != DUK_TOK_ELSE)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_FINALLY) != DUK_TOK_FINALLY)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_FOR) != DUK_TOK_FOR)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_LC_FUNCTION) != DUK_TOK_FUNCTION)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_IF) != DUK_TOK_IF)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_IN) != DUK_TOK_IN)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_INSTANCEOF) != DUK_TOK_INSTANCEOF)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_NEW) != DUK_TOK_NEW)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_RETURN) != DUK_TOK_RETURN)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_SWITCH) != DUK_TOK_SWITCH)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_THIS) != DUK_TOK_THIS)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_THROW) != DUK_TOK_THROW)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_TRY) != DUK_TOK_TRY)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_TYPEOF) != DUK_TOK_TYPEOF)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_VAR) != DUK_TOK_VAR)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_VOID) != DUK_TOK_VOID)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_WHILE) != DUK_TOK_WHILE)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_WITH) != DUK_TOK_WITH)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_CLASS) != DUK_TOK_CLASS)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_CONST) != DUK_TOK_CONST)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_ENUM) != DUK_TOK_ENUM)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_EXPORT) != DUK_TOK_EXPORT)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_EXTENDS) != DUK_TOK_EXTENDS)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_IMPORT) != DUK_TOK_IMPORT)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_SUPER) != DUK_TOK_SUPER)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_LC_NULL) != DUK_TOK_NULL)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_TRUE) != DUK_TOK_TRUE)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_FALSE) != DUK_TOK_FALSE)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_IMPLEMENTS) != DUK_TOK_IMPLEMENTS)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_INTERFACE) != DUK_TOK_INTERFACE)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_LET) != DUK_TOK_LET)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_PACKAGE) != DUK_TOK_PACKAGE)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_PRIVATE) != DUK_TOK_PRIVATE)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_PROTECTED) != DUK_TOK_PROTECTED)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_PUBLIC) != DUK_TOK_PUBLIC)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_STATIC) != DUK_TOK_STATIC)
#error mismatch in token defines
#endif
#if (DUK_STRIDX_TO_TOK(DUK_STRIDX_YIELD) != DUK_TOK_YIELD)
#error mismatch in token defines
#endif
/* Regexp tokens */
#define DUK_RETOK_EOF 0
#define DUK_RETOK_DISJUNCTION 1
#define DUK_RETOK_QUANTIFIER 2
#define DUK_RETOK_ASSERT_START 3
#define DUK_RETOK_ASSERT_END 4
#define DUK_RETOK_ASSERT_WORD_BOUNDARY 5
#define DUK_RETOK_ASSERT_NOT_WORD_BOUNDARY 6
#define DUK_RETOK_ASSERT_START_POS_LOOKAHEAD 7
#define DUK_RETOK_ASSERT_START_NEG_LOOKAHEAD 8
#define DUK_RETOK_ATOM_PERIOD 9
#define DUK_RETOK_ATOM_CHAR 10
#define DUK_RETOK_ATOM_DIGIT 11
#define DUK_RETOK_ATOM_NOT_DIGIT 12
#define DUK_RETOK_ATOM_WHITE 13
#define DUK_RETOK_ATOM_NOT_WHITE 14
#define DUK_RETOK_ATOM_WORD_CHAR 15
#define DUK_RETOK_ATOM_NOT_WORD_CHAR 16
#define DUK_RETOK_ATOM_BACKREFERENCE 17
#define DUK_RETOK_ATOM_START_CAPTURE_GROUP 18
#define DUK_RETOK_ATOM_START_NONCAPTURE_GROUP 19
#define DUK_RETOK_ATOM_START_CHARCLASS 20
#define DUK_RETOK_ATOM_START_CHARCLASS_INVERTED 21
#define DUK_RETOK_ATOM_END_GROUP 22
/* Constants for duk_lexer_ctx.buf. */
#define DUK_LEXER_TEMP_BUF_LIMIT 256
/* A token value. Can be memcpy()'d, but note that slot1/slot2 values are on the valstack.
* Some fields (like num, str1, str2) are only valid for specific token types and may have
* stale values otherwise.
*/
struct duk_token {
duk_small_int_t t; /* token type (with reserved word identification) */
duk_small_int_t t_nores; /* token type (with reserved words as DUK_TOK_IDENTIFER) */
duk_double_t num; /* numeric value of token */
duk_hstring *str1; /* string 1 of token (borrowed, stored to ctx->slot1_idx) */
duk_hstring *str2; /* string 2 of token (borrowed, stored to ctx->slot2_idx) */
duk_size_t start_offset; /* start byte offset of token in lexer input */
duk_int_t start_line; /* start line of token (first char) */
duk_int_t num_escapes; /* number of escapes and line continuations (for directive prologue) */
duk_bool_t lineterm; /* token was preceded by a lineterm */
duk_bool_t allow_auto_semi; /* token allows automatic semicolon insertion (eof or preceded by newline) */
};
#define DUK_RE_QUANTIFIER_INFINITE ((duk_uint32_t) 0xffffffffUL)
/* A regexp token value. */
struct duk_re_token {
duk_small_int_t t; /* token type */
duk_small_int_t greedy;
duk_uint_fast32_t num; /* numeric value (character, count) */
duk_uint_fast32_t qmin;
duk_uint_fast32_t qmax;
};
/* A structure for 'snapshotting' a point for rewinding */
struct duk_lexer_point {
duk_size_t offset;
duk_int_t line;
};
/* Lexer codepoint with additional info like offset/line number */
struct duk_lexer_codepoint {
duk_codepoint_t codepoint;
duk_size_t offset;
duk_int_t line;
};
/* Lexer context. Same context is used for Ecmascript and Regexp parsing. */
struct duk_lexer_ctx {
#if defined(DUK_USE_LEXER_SLIDING_WINDOW)
duk_lexer_codepoint *window; /* unicode code points, window[0] is always next, points to 'buffer' */
duk_lexer_codepoint buffer[DUK_LEXER_BUFFER_SIZE];
#else
duk_lexer_codepoint window[DUK_LEXER_WINDOW_SIZE]; /* unicode code points, window[0] is always next */
#endif
duk_hthread *thr; /* thread; minimizes argument passing */
const duk_uint8_t *input; /* input string (may be a user pointer) */
duk_size_t input_length; /* input byte length */
duk_size_t input_offset; /* input offset for window leading edge (not window[0]) */
duk_int_t input_line; /* input linenumber at input_offset (not window[0]), init to 1 */
duk_idx_t slot1_idx; /* valstack slot for 1st token value */
duk_idx_t slot2_idx; /* valstack slot for 2nd token value */
duk_idx_t buf_idx; /* valstack slot for temp buffer */
duk_hbuffer_dynamic *buf; /* temp accumulation buffer */
duk_bufwriter_ctx bw; /* bufwriter for temp accumulation */
duk_int_t token_count; /* number of tokens parsed */
duk_int_t token_limit; /* maximum token count before error (sanity backstop) */
};
/*
* Prototypes
*/
DUK_INTERNAL_DECL void duk_lexer_initctx(duk_lexer_ctx *lex_ctx);
DUK_INTERNAL_DECL void duk_lexer_setpoint(duk_lexer_ctx *lex_ctx, duk_lexer_point *pt);
DUK_INTERNAL_DECL
void duk_lexer_parse_js_input_element(duk_lexer_ctx *lex_ctx,
duk_token *out_token,
duk_bool_t strict_mode,
duk_bool_t regexp_mode);
#ifdef DUK_USE_REGEXP_SUPPORT
DUK_INTERNAL_DECL void duk_lexer_parse_re_token(duk_lexer_ctx *lex_ctx, duk_re_token *out_token);
DUK_INTERNAL_DECL void duk_lexer_parse_re_ranges(duk_lexer_ctx *lex_ctx, duk_re_range_callback gen_range, void *userdata);
#endif /* DUK_USE_REGEXP_SUPPORT */
#endif /* DUK_LEXER_H_INCLUDED */
#line 1 "duk_js_compiler.h"
/*
* Ecmascript compiler.
*/
#ifndef DUK_JS_COMPILER_H_INCLUDED
#define DUK_JS_COMPILER_H_INCLUDED
/* ecmascript compiler limits */
#define DUK_COMPILER_TOKEN_LIMIT 100000000L /* 1e8: protects against deeply nested inner functions */
/* maximum loopcount for peephole optimization */
#define DUK_COMPILER_PEEPHOLE_MAXITER 3
/* maximum bytecode length in instructions */
#define DUK_COMPILER_MAX_BYTECODE_LENGTH (256L * 1024L * 1024L) /* 1 GB */
/*
* Compiler intermediate values
*
* Intermediate values describe either plain values (e.g. strings or
* numbers) or binary operations which have not yet been coerced into
* either a left-hand-side or right-hand-side role (e.g. object property).
*/
#define DUK_IVAL_NONE 0 /* no value */
#define DUK_IVAL_PLAIN 1 /* register, constant, or value */
#define DUK_IVAL_ARITH 2 /* binary arithmetic; DUK_OP_ADD, DUK_OP_EQ, other binary ops */
#define DUK_IVAL_ARITH_EXTRAOP 3 /* binary arithmetic using extraops; DUK_EXTRAOP_INSTOF etc */
#define DUK_IVAL_PROP 4 /* property access */
#define DUK_IVAL_VAR 5 /* variable access */
#define DUK_ISPEC_NONE 0 /* no value */
#define DUK_ISPEC_VALUE 1 /* value resides in 'valstack_idx' */
#define DUK_ISPEC_REGCONST 2 /* value resides in a register or constant */
/* bit mask which indicates that a regconst is a constant instead of a register */
#define DUK_JS_CONST_MARKER 0x80000000UL
/* type to represent a reg/const reference during compilation */
typedef duk_uint32_t duk_regconst_t;
/* type to represent a straight register reference, with <0 indicating none */
typedef duk_int32_t duk_reg_t;
typedef struct {
duk_small_uint_t t; /* DUK_ISPEC_XXX */
duk_regconst_t regconst;
duk_idx_t valstack_idx; /* always set; points to a reserved valstack slot */
} duk_ispec;
typedef struct {
/*
* PLAIN: x1
* ARITH: x1 <op> x2
* PROP: x1.x2
* VAR: x1 (name)
*/
/* XXX: can be optimized for smaller footprint esp. on 32-bit environments */
duk_small_uint_t t; /* DUK_IVAL_XXX */
duk_small_uint_t op; /* bytecode opcode (or extraop) for binary ops */
duk_ispec x1;
duk_ispec x2;
} duk_ivalue;
/*
* Bytecode instruction representation during compilation
*
* Contains the actual instruction and (optionally) debug info.
*/
struct duk_compiler_instr {
duk_instr_t ins;
#if defined(DUK_USE_PC2LINE)
duk_uint32_t line;
#endif
};
/*
* Compiler state
*/
#define DUK_LABEL_FLAG_ALLOW_BREAK (1 << 0)
#define DUK_LABEL_FLAG_ALLOW_CONTINUE (1 << 1)
#define DUK_DECL_TYPE_VAR 0
#define DUK_DECL_TYPE_FUNC 1
/* XXX: optimize to 16 bytes */
typedef struct {
duk_small_uint_t flags;
duk_int_t label_id; /* numeric label_id (-1 reserved as marker) */
duk_hstring *h_label; /* borrowed label name */
duk_int_t catch_depth; /* catch depth at point of definition */
duk_int_t pc_label; /* pc of label statement:
* pc+1: break jump site
* pc+2: continue jump site
*/
/* Fast jumps (which avoid longjmp) jump directly to the jump sites
* which are always known even while the iteration/switch statement
* is still being parsed. A final peephole pass "straightens out"
* the jumps.
*/
} duk_labelinfo;
/* Compiling state of one function, eventually converted to duk_hcompiledfunction */
struct duk_compiler_func {
/* These pointers are at the start of the struct so that they pack
* nicely. Mixing pointers and integer values is bad on some
* platforms (e.g. if int is 32 bits and pointers are 64 bits).
*/
duk_bufwriter_ctx bw_code; /* bufwriter for code */
duk_hstring *h_name; /* function name (borrowed reference), ends up in _name */
/* h_code: held in bw_code */
duk_hobject *h_consts; /* array */
duk_hobject *h_funcs; /* array of function templates: [func1, offset1, line1, func2, offset2, line2]
* offset/line points to closing brace to allow skipping on pass 2
*/
duk_hobject *h_decls; /* array of declarations: [ name1, val1, name2, val2, ... ]
* valN = (typeN) | (fnum << 8), where fnum is inner func number (0 for vars)
* record function and variable declarations in pass 1
*/
duk_hobject *h_labelnames; /* array of active label names */
duk_hbuffer_dynamic *h_labelinfos; /* C array of duk_labelinfo */
duk_hobject *h_argnames; /* array of formal argument names (-> _Formals) */
duk_hobject *h_varmap; /* variable map for pass 2 (identifier -> register number or null (unmapped)) */
/* value stack indices for tracking objects */
/* code_idx: not needed */
duk_idx_t consts_idx;
duk_idx_t funcs_idx;
duk_idx_t decls_idx;
duk_idx_t labelnames_idx;
duk_idx_t labelinfos_idx;
duk_idx_t argnames_idx;
duk_idx_t varmap_idx;
/* temp reg handling */
duk_reg_t temp_first; /* first register that is a temporary (below: variables) */
duk_reg_t temp_next; /* next temporary register to allocate */
duk_reg_t temp_max; /* highest value of temp_reg (temp_max - 1 is highest used reg) */
/* shuffle registers if large number of regs/consts */
duk_reg_t shuffle1;
duk_reg_t shuffle2;
duk_reg_t shuffle3;
/* stats for current expression being parsed */
duk_int_t nud_count;
duk_int_t led_count;
duk_int_t paren_level; /* parenthesis count, 0 = top level */
duk_bool_t expr_lhs; /* expression is left-hand-side compatible */
duk_bool_t allow_in; /* current paren level allows 'in' token */
/* misc */
duk_int_t stmt_next; /* statement id allocation (running counter) */
duk_int_t label_next; /* label id allocation (running counter) */
duk_int_t catch_depth; /* catch stack depth */
duk_int_t with_depth; /* with stack depth (affects identifier lookups) */
duk_int_t fnum_next; /* inner function numbering */
duk_int_t num_formals; /* number of formal arguments */
duk_reg_t reg_stmt_value; /* register for writing value of 'non-empty' statements (global or eval code), -1 is marker */
#if defined(DUK_USE_DEBUGGER_SUPPORT)
duk_int_t min_line; /* XXX: typing (duk_hcompiledfunction has duk_uint32_t) */
duk_int_t max_line;
#endif
/* status booleans */
duk_bool_t is_function; /* is an actual function (not global/eval code) */
duk_bool_t is_eval; /* is eval code */
duk_bool_t is_global; /* is global code */
duk_bool_t is_setget; /* is a setter/getter */
duk_bool_t is_decl; /* is a function declaration (as opposed to function expression) */
duk_bool_t is_strict; /* function is strict */
duk_bool_t is_notail; /* function must not be tail called */
duk_bool_t in_directive_prologue; /* parsing in "directive prologue", recognize directives */
duk_bool_t in_scanning; /* parsing in "scanning" phase (first pass) */
duk_bool_t may_direct_eval; /* function may call direct eval */
duk_bool_t id_access_arguments; /* function refers to 'arguments' identifier */
duk_bool_t id_access_slow; /* function makes one or more slow path accesses */
duk_bool_t is_arguments_shadowed; /* argument/function declaration shadows 'arguments' */
duk_bool_t needs_shuffle; /* function needs shuffle registers */
duk_bool_t reject_regexp_in_adv; /* reject RegExp literal on next advance() call; needed for handling IdentifierName productions */
};
struct duk_compiler_ctx {
duk_hthread *thr;
/* filename being compiled (ends up in functions' '_filename' property) */
duk_hstring *h_filename; /* borrowed reference */
/* lexing (tokenization) state (contains two valstack slot indices) */
duk_lexer_ctx lex;
/* current and previous token for parsing */
duk_token prev_token;
duk_token curr_token;
duk_idx_t tok11_idx; /* curr_token slot1 (matches 'lex' slot1_idx) */
duk_idx_t tok12_idx; /* curr_token slot2 (matches 'lex' slot2_idx) */
duk_idx_t tok21_idx; /* prev_token slot1 */
duk_idx_t tok22_idx; /* prev_token slot2 */
/* recursion limit */
duk_int_t recursion_depth;
duk_int_t recursion_limit;
/* code emission temporary */
duk_int_t emit_jumpslot_pc;
/* current function being compiled (embedded instead of pointer for more compact access) */
duk_compiler_func curr_func;
};
/*
* Prototypes
*/
#define DUK_JS_COMPILE_FLAG_EVAL (1 << 0) /* source is eval code (not global) */
#define DUK_JS_COMPILE_FLAG_STRICT (1 << 1) /* strict outer context */
#define DUK_JS_COMPILE_FLAG_FUNCEXPR (1 << 2) /* source is a function expression (used for Function constructor) */
DUK_INTERNAL_DECL void duk_js_compile(duk_hthread *thr, const duk_uint8_t *src_buffer, duk_size_t src_length, duk_small_uint_t flags);
#endif /* DUK_JS_COMPILER_H_INCLUDED */
#line 1 "duk_regexp.h"
/*
* Regular expression structs, constants, and bytecode defines.
*/
#ifndef DUK_REGEXP_H_INCLUDED
#define DUK_REGEXP_H_INCLUDED
/* maximum bytecode copies for {n,m} quantifiers */
#define DUK_RE_MAX_ATOM_COPIES 1000
/* regexp compilation limits */
#define DUK_RE_COMPILE_TOKEN_LIMIT 100000000L /* 1e8 */
/* regexp execution limits */
#define DUK_RE_EXECUTE_STEPS_LIMIT 1000000000L /* 1e9 */
/* regexp opcodes */
#define DUK_REOP_MATCH 1
#define DUK_REOP_CHAR 2
#define DUK_REOP_PERIOD 3
#define DUK_REOP_RANGES 4
#define DUK_REOP_INVRANGES 5
#define DUK_REOP_JUMP 6
#define DUK_REOP_SPLIT1 7
#define DUK_REOP_SPLIT2 8
#define DUK_REOP_SQMINIMAL 9
#define DUK_REOP_SQGREEDY 10
#define DUK_REOP_SAVE 11
#define DUK_REOP_WIPERANGE 12
#define DUK_REOP_LOOKPOS 13
#define DUK_REOP_LOOKNEG 14
#define DUK_REOP_BACKREFERENCE 15
#define DUK_REOP_ASSERT_START 16
#define DUK_REOP_ASSERT_END 17
#define DUK_REOP_ASSERT_WORD_BOUNDARY 18
#define DUK_REOP_ASSERT_NOT_WORD_BOUNDARY 19
/* flags */
#define DUK_RE_FLAG_GLOBAL (1 << 0)
#define DUK_RE_FLAG_IGNORE_CASE (1 << 1)
#define DUK_RE_FLAG_MULTILINE (1 << 2)
struct duk_re_matcher_ctx {
duk_hthread *thr;
duk_uint32_t re_flags;
const duk_uint8_t *input;
const duk_uint8_t *input_end;
const duk_uint8_t *bytecode;
const duk_uint8_t *bytecode_end;
const duk_uint8_t **saved; /* allocated from valstack (fixed buffer) */
duk_uint32_t nsaved;
duk_uint32_t recursion_depth;
duk_uint32_t recursion_limit;
duk_uint32_t steps_count;
duk_uint32_t steps_limit;
};
struct duk_re_compiler_ctx {
duk_hthread *thr;
duk_uint32_t re_flags;
duk_lexer_ctx lex;
duk_re_token curr_token;
duk_bufwriter_ctx bw;
duk_uint32_t captures; /* highest capture number emitted so far (used as: ++captures) */
duk_uint32_t highest_backref;
duk_uint32_t recursion_depth;
duk_uint32_t recursion_limit;
duk_uint32_t nranges; /* internal temporary value, used for char classes */
};
/*
* Prototypes
*/
DUK_INTERNAL_DECL void duk_regexp_compile(duk_hthread *thr);
DUK_INTERNAL_DECL void duk_regexp_create_instance(duk_hthread *thr);
DUK_INTERNAL_DECL void duk_regexp_match(duk_hthread *thr);
DUK_INTERNAL_DECL void duk_regexp_match_force_global(duk_hthread *thr); /* hacky helper for String.prototype.split() */
#endif /* DUK_REGEXP_H_INCLUDED */
#line 1 "duk_heaphdr.h"
/*
* Heap header definition and assorted macros, including ref counting.
* Access all fields through the accessor macros.
*/
#ifndef DUK_HEAPHDR_H_INCLUDED
#define DUK_HEAPHDR_H_INCLUDED
/*
* Common heap header
*
* All heap objects share the same flags and refcount fields. Objects other
* than strings also need to have a single or double linked list pointers
* for insertion into the "heap allocated" list. Strings are held in the
* heap-wide string table so they don't need link pointers.
*
* Technically, 'h_refcount' must be wide enough to guarantee that it cannot
* wrap (otherwise objects might be freed incorrectly after wrapping). This
* means essentially that the refcount field must be as wide as data pointers.
* On 64-bit platforms this means that the refcount needs to be 64 bits even
* if an 'int' is 32 bits. This is a bit unfortunate, and compromising on
* this might be reasonable in the future.
*
* Heap header size on 32-bit platforms: 8 bytes without reference counting,
* 16 bytes with reference counting.
*/
struct duk_heaphdr {
duk_uint32_t h_flags;
#if defined(DUK_USE_REFERENCE_COUNTING)
#if defined(DUK_USE_REFCOUNT16)
duk_uint16_t h_refcount16;
#else
duk_size_t h_refcount;
#endif
#endif
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t h_next16;
#else
duk_heaphdr *h_next;
#endif
#if defined(DUK_USE_DOUBLE_LINKED_HEAP)
/* refcounting requires direct heap frees, which in turn requires a dual linked heap */
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t h_prev16;
#else
duk_heaphdr *h_prev;
#endif
#endif
/* When DUK_USE_HEAPPTR16 (and DUK_USE_REFCOUNT16) is in use, the
* struct won't align nicely to 4 bytes. This 16-bit extra field
* is added to make the alignment clean; the field can be used by
* heap objects when 16-bit packing is used. This field is now
* conditional to DUK_USE_HEAPPTR16 only, but it is intended to be
* used with DUK_USE_REFCOUNT16 and DUK_USE_DOUBLE_LINKED_HEAP;
* this only matter to low memory environments anyway.
*/
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t h_extra16;
#endif
};
struct duk_heaphdr_string {
/* 16 bits would be enough for shared heaphdr flags and duk_hstring
* flags. The initial parts of duk_heaphdr_string and duk_heaphdr
* must match so changing the flags field size here would be quite
* awkward. However, to minimize struct size, we can pack at least
* 16 bits of duk_hstring data into the flags field.
*/
duk_uint32_t h_flags;
#if defined(DUK_USE_REFERENCE_COUNTING)
#if defined(DUK_USE_REFCOUNT16)
duk_uint16_t h_refcount16;
duk_uint16_t h_strextra16; /* round out to 8 bytes */
#else
duk_size_t h_refcount;
#endif
#endif
};
#define DUK_HEAPHDR_FLAGS_TYPE_MASK 0x00000003UL
#define DUK_HEAPHDR_FLAGS_FLAG_MASK (~DUK_HEAPHDR_FLAGS_TYPE_MASK)
/* 2 bits for heap type */
#define DUK_HEAPHDR_FLAGS_HEAP_START 2 /* 5 heap flags */
#define DUK_HEAPHDR_FLAGS_USER_START 7 /* 25 user flags */
#define DUK_HEAPHDR_HEAP_FLAG_NUMBER(n) (DUK_HEAPHDR_FLAGS_HEAP_START + (n))
#define DUK_HEAPHDR_USER_FLAG_NUMBER(n) (DUK_HEAPHDR_FLAGS_USER_START + (n))
#define DUK_HEAPHDR_HEAP_FLAG(n) (1UL << (DUK_HEAPHDR_FLAGS_HEAP_START + (n)))
#define DUK_HEAPHDR_USER_FLAG(n) (1UL << (DUK_HEAPHDR_FLAGS_USER_START + (n)))
#define DUK_HEAPHDR_FLAG_REACHABLE DUK_HEAPHDR_HEAP_FLAG(0) /* mark-and-sweep: reachable */
#define DUK_HEAPHDR_FLAG_TEMPROOT DUK_HEAPHDR_HEAP_FLAG(1) /* mark-and-sweep: children not processed */
#define DUK_HEAPHDR_FLAG_FINALIZABLE DUK_HEAPHDR_HEAP_FLAG(2) /* mark-and-sweep: finalizable (on current pass) */
#define DUK_HEAPHDR_FLAG_FINALIZED DUK_HEAPHDR_HEAP_FLAG(3) /* mark-and-sweep: finalized (on previous pass) */
#define DUK_HEAPHDR_FLAG_READONLY DUK_HEAPHDR_HEAP_FLAG(4) /* read-only object, in code section */
#define DUK_HTYPE_MIN 1
#define DUK_HTYPE_STRING 1
#define DUK_HTYPE_OBJECT 2
#define DUK_HTYPE_BUFFER 3
#define DUK_HTYPE_MAX 3
#if defined(DUK_USE_HEAPPTR16)
#define DUK_HEAPHDR_GET_NEXT(heap,h) \
((duk_heaphdr *) DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, (h)->h_next16))
#define DUK_HEAPHDR_SET_NEXT(heap,h,val) do { \
(h)->h_next16 = DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (void *) val); \
} while (0)
#else
#define DUK_HEAPHDR_GET_NEXT(heap,h) ((h)->h_next)
#define DUK_HEAPHDR_SET_NEXT(heap,h,val) do { \
(h)->h_next = (val); \
} while (0)
#endif
#if defined(DUK_USE_DOUBLE_LINKED_HEAP)
#if defined(DUK_USE_HEAPPTR16)
#define DUK_HEAPHDR_GET_PREV(heap,h) \
((duk_heaphdr *) DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, (h)->h_prev16))
#define DUK_HEAPHDR_SET_PREV(heap,h,val) do { \
(h)->h_prev16 = DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (void *) (val)); \
} while (0)
#else
#define DUK_HEAPHDR_GET_PREV(heap,h) ((h)->h_prev)
#define DUK_HEAPHDR_SET_PREV(heap,h,val) do { \
(h)->h_prev = (val); \
} while (0)
#endif
#endif
#if defined(DUK_USE_REFERENCE_COUNTING)
#if defined(DUK_USE_REFCOUNT16)
#define DUK_HEAPHDR_GET_REFCOUNT(h) ((h)->h_refcount16)
#define DUK_HEAPHDR_SET_REFCOUNT(h,val) do { \
(h)->h_refcount16 = (val); \
} while (0)
#define DUK_HEAPHDR_PREINC_REFCOUNT(h) (++(h)->h_refcount16) /* result: updated refcount */
#define DUK_HEAPHDR_PREDEC_REFCOUNT(h) (--(h)->h_refcount16) /* result: updated refcount */
#else
#define DUK_HEAPHDR_GET_REFCOUNT(h) ((h)->h_refcount)
#define DUK_HEAPHDR_SET_REFCOUNT(h,val) do { \
(h)->h_refcount = (val); \
} while (0)
#define DUK_HEAPHDR_PREINC_REFCOUNT(h) (++(h)->h_refcount) /* result: updated refcount */
#define DUK_HEAPHDR_PREDEC_REFCOUNT(h) (--(h)->h_refcount) /* result: updated refcount */
#endif
#else
/* refcount macros not defined without refcounting, caller must #ifdef now */
#endif /* DUK_USE_REFERENCE_COUNTING */
/*
* Note: type is treated as a field separate from flags, so some masking is
* involved in the macros below.
*/
#define DUK_HEAPHDR_GET_FLAGS_RAW(h) ((h)->h_flags)
#define DUK_HEAPHDR_GET_FLAGS(h) ((h)->h_flags & DUK_HEAPHDR_FLAGS_FLAG_MASK)
#define DUK_HEAPHDR_SET_FLAGS(h,val) do { \
(h)->h_flags = ((h)->h_flags & ~(DUK_HEAPHDR_FLAGS_FLAG_MASK)) | (val); \
} while (0)
#define DUK_HEAPHDR_GET_TYPE(h) ((h)->h_flags & DUK_HEAPHDR_FLAGS_TYPE_MASK)
#define DUK_HEAPHDR_SET_TYPE(h,val) do { \
(h)->h_flags = ((h)->h_flags & ~(DUK_HEAPHDR_FLAGS_TYPE_MASK)) | (val); \
} while (0)
#define DUK_HEAPHDR_HTYPE_VALID(h) ( \
DUK_HEAPHDR_GET_TYPE((h)) >= DUK_HTYPE_MIN && \
DUK_HEAPHDR_GET_TYPE((h)) <= DUK_HTYPE_MAX \
)
#define DUK_HEAPHDR_SET_TYPE_AND_FLAGS(h,tval,fval) do { \
(h)->h_flags = ((tval) & DUK_HEAPHDR_FLAGS_TYPE_MASK) | \
((fval) & DUK_HEAPHDR_FLAGS_FLAG_MASK); \
} while (0)
#define DUK_HEAPHDR_SET_FLAG_BITS(h,bits) do { \
DUK_ASSERT(((bits) & ~(DUK_HEAPHDR_FLAGS_FLAG_MASK)) == 0); \
(h)->h_flags |= (bits); \
} while (0)
#define DUK_HEAPHDR_CLEAR_FLAG_BITS(h,bits) do { \
DUK_ASSERT(((bits) & ~(DUK_HEAPHDR_FLAGS_FLAG_MASK)) == 0); \
(h)->h_flags &= ~((bits)); \
} while (0)
#define DUK_HEAPHDR_CHECK_FLAG_BITS(h,bits) (((h)->h_flags & (bits)) != 0)
#define DUK_HEAPHDR_SET_REACHABLE(h) DUK_HEAPHDR_SET_FLAG_BITS((h),DUK_HEAPHDR_FLAG_REACHABLE)
#define DUK_HEAPHDR_CLEAR_REACHABLE(h) DUK_HEAPHDR_CLEAR_FLAG_BITS((h),DUK_HEAPHDR_FLAG_REACHABLE)
#define DUK_HEAPHDR_HAS_REACHABLE(h) DUK_HEAPHDR_CHECK_FLAG_BITS((h),DUK_HEAPHDR_FLAG_REACHABLE)
#define DUK_HEAPHDR_SET_TEMPROOT(h) DUK_HEAPHDR_SET_FLAG_BITS((h),DUK_HEAPHDR_FLAG_TEMPROOT)
#define DUK_HEAPHDR_CLEAR_TEMPROOT(h) DUK_HEAPHDR_CLEAR_FLAG_BITS((h),DUK_HEAPHDR_FLAG_TEMPROOT)
#define DUK_HEAPHDR_HAS_TEMPROOT(h) DUK_HEAPHDR_CHECK_FLAG_BITS((h),DUK_HEAPHDR_FLAG_TEMPROOT)
#define DUK_HEAPHDR_SET_FINALIZABLE(h) DUK_HEAPHDR_SET_FLAG_BITS((h),DUK_HEAPHDR_FLAG_FINALIZABLE)
#define DUK_HEAPHDR_CLEAR_FINALIZABLE(h) DUK_HEAPHDR_CLEAR_FLAG_BITS((h),DUK_HEAPHDR_FLAG_FINALIZABLE)
#define DUK_HEAPHDR_HAS_FINALIZABLE(h) DUK_HEAPHDR_CHECK_FLAG_BITS((h),DUK_HEAPHDR_FLAG_FINALIZABLE)
#define DUK_HEAPHDR_SET_FINALIZED(h) DUK_HEAPHDR_SET_FLAG_BITS((h),DUK_HEAPHDR_FLAG_FINALIZED)
#define DUK_HEAPHDR_CLEAR_FINALIZED(h) DUK_HEAPHDR_CLEAR_FLAG_BITS((h),DUK_HEAPHDR_FLAG_FINALIZED)
#define DUK_HEAPHDR_HAS_FINALIZED(h) DUK_HEAPHDR_CHECK_FLAG_BITS((h),DUK_HEAPHDR_FLAG_FINALIZED)
#define DUK_HEAPHDR_SET_READONLY(h) DUK_HEAPHDR_SET_FLAG_BITS((h),DUK_HEAPHDR_FLAG_READONLY)
#define DUK_HEAPHDR_CLEAR_READONLY(h) DUK_HEAPHDR_CLEAR_FLAG_BITS((h),DUK_HEAPHDR_FLAG_READONLY)
#define DUK_HEAPHDR_HAS_READONLY(h) DUK_HEAPHDR_CHECK_FLAG_BITS((h),DUK_HEAPHDR_FLAG_READONLY)
/* get or set a range of flags; m=first bit number, n=number of bits */
#define DUK_HEAPHDR_GET_FLAG_RANGE(h,m,n) (((h)->h_flags >> (m)) & ((1UL << (n)) - 1UL))
#define DUK_HEAPHDR_SET_FLAG_RANGE(h,m,n,v) do { \
(h)->h_flags = \
((h)->h_flags & (~(((1 << (n)) - 1) << (m)))) \
| ((v) << (m)); \
} while (0)
/* init pointer fields to null */
#if defined(DUK_USE_DOUBLE_LINKED_HEAP)
#define DUK_HEAPHDR_INIT_NULLS(h) do { \
DUK_HEAPHDR_SET_NEXT((h), (void *) NULL); \
DUK_HEAPHDR_SET_PREV((h), (void *) NULL); \
} while (0)
#else
#define DUK_HEAPHDR_INIT_NULLS(h) do { \
DUK_HEAPHDR_SET_NEXT((h), (void *) NULL); \
} while (0)
#endif
#define DUK_HEAPHDR_STRING_INIT_NULLS(h) /* currently nop */
/*
* Assert helpers
*/
/* Check that prev/next links are consistent: if e.g. h->prev is != NULL,
* h->prev->next should point back to h.
*/
#if defined(DUK_USE_DOUBLE_LINKED_HEAP) && defined(DUK_USE_ASSERTIONS)
#define DUK_ASSERT_HEAPHDR_LINKS(heap,h) do { \
if ((h) != NULL) { \
duk_heaphdr *h__prev, *h__next; \
h__prev = DUK_HEAPHDR_GET_PREV((heap), (h)); \
h__next = DUK_HEAPHDR_GET_NEXT((heap), (h)); \
DUK_ASSERT(h__prev == NULL || (DUK_HEAPHDR_GET_NEXT((heap), h__prev) == (h))); \
DUK_ASSERT(h__next == NULL || (DUK_HEAPHDR_GET_PREV((heap), h__next) == (h))); \
} \
} while (0)
#else
#define DUK_ASSERT_HEAPHDR_LINKS(heap,h) do {} while (0)
#endif
/*
* Reference counting helper macros. The macros take a thread argument
* and must thus always be executed in a specific thread context. The
* thread argument is needed for features like finalization. Currently
* it is not required for INCREF, but it is included just in case.
*
* Note that 'raw' macros such as DUK_HEAPHDR_GET_REFCOUNT() are not
* defined without DUK_USE_REFERENCE_COUNTING, so caller must #ifdef
* around them.
*/
#if defined(DUK_USE_REFERENCE_COUNTING)
#if defined(DUK_USE_ROM_OBJECTS)
/* With ROM objects "needs refcount update" is true when the value is
* heap allocated and is not a ROM object.
*/
/* XXX: double evaluation for 'tv' argument. */
#define DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv) \
(DUK_TVAL_IS_HEAP_ALLOCATED((tv)) && !DUK_HEAPHDR_HAS_READONLY(DUK_TVAL_GET_HEAPHDR((tv))))
#define DUK_HEAPHDR_NEEDS_REFCOUNT_UPDATE(h) (!DUK_HEAPHDR_HAS_READONLY((h)))
#else /* DUK_USE_ROM_OBJECTS */
/* Without ROM objects "needs refcount update" == is heap allocated. */
#define DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv) DUK_TVAL_IS_HEAP_ALLOCATED((tv))
#define DUK_HEAPHDR_NEEDS_REFCOUNT_UPDATE(h) 1
#endif /* DUK_USE_ROM_OBJECTS */
/* Fast variants, inline refcount operations except for refzero handling.
* Can be used explicitly when speed is always more important than size.
* For a good compiler and a single file build, these are basically the
* same as a forced inline.
*/
#define DUK_TVAL_INCREF_FAST(thr,tv) do { \
duk_tval *duk__tv = (tv); \
DUK_ASSERT(duk__tv != NULL); \
if (DUK_TVAL_NEEDS_REFCOUNT_UPDATE(duk__tv)) { \
duk_heaphdr *duk__h = DUK_TVAL_GET_HEAPHDR(duk__tv); \
DUK_ASSERT(duk__h != NULL); \
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(duk__h)); \
DUK_HEAPHDR_PREINC_REFCOUNT(duk__h); \
} \
} while (0)
#define DUK_TVAL_DECREF_FAST(thr,tv) do { \
duk_tval *duk__tv = (tv); \
DUK_ASSERT(duk__tv != NULL); \
if (DUK_TVAL_NEEDS_REFCOUNT_UPDATE(duk__tv)) { \
duk_heaphdr *duk__h = DUK_TVAL_GET_HEAPHDR(duk__tv); \
DUK_ASSERT(duk__h != NULL); \
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(duk__h)); \
DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(duk__h) > 0); \
if (DUK_HEAPHDR_PREDEC_REFCOUNT(duk__h) == 0) { \
duk_heaphdr_refzero((thr), duk__h); \
} \
} \
} while (0)
#define DUK_HEAPHDR_INCREF_FAST(thr,h) do { \
duk_heaphdr *duk__h = (duk_heaphdr *) (h); \
DUK_ASSERT(duk__h != NULL); \
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(duk__h)); \
if (DUK_HEAPHDR_NEEDS_REFCOUNT_UPDATE(duk__h)) { \
DUK_HEAPHDR_PREINC_REFCOUNT(duk__h); \
} \
} while (0)
#define DUK_HEAPHDR_DECREF_FAST(thr,h) do { \
duk_heaphdr *duk__h = (duk_heaphdr *) (h); \
DUK_ASSERT(duk__h != NULL); \
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(duk__h)); \
DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(duk__h) > 0); \
if (DUK_HEAPHDR_NEEDS_REFCOUNT_UPDATE(duk__h)) { \
if (DUK_HEAPHDR_PREDEC_REFCOUNT(duk__h) == 0) { \
duk_heaphdr_refzero((thr), duk__h); \
} \
} \
} while (0)
/* Slow variants, call to a helper to reduce code size.
* Can be used explicitly when size is always more important than speed.
*/
#define DUK_TVAL_INCREF_SLOW(thr,tv) do { \
duk_tval_incref((tv)); \
} while (0)
#define DUK_TVAL_DECREF_SLOW(thr,tv) do { \
duk_tval_decref((thr), (tv)); \
} while (0)
#define DUK_HEAPHDR_INCREF_SLOW(thr,h) do { \
duk_heaphdr_incref((duk_heaphdr *) (h)); \
} while (0)
#define DUK_HEAPHDR_DECREF_SLOW(thr,h) do { \
duk_heaphdr_decref((thr), (duk_heaphdr *) (h)); \
} while (0)
/* Default variants. Selection depends on speed/size preference.
* Concretely: with gcc 4.8.1 -Os x64 the difference in final binary
* is about +1kB for _FAST variants.
*/
#if defined(DUK_USE_FAST_REFCOUNT_DEFAULT)
#define DUK_TVAL_INCREF(thr,tv) DUK_TVAL_INCREF_FAST((thr),(tv))
#define DUK_TVAL_DECREF(thr,tv) DUK_TVAL_DECREF_FAST((thr),(tv))
#define DUK_HEAPHDR_INCREF(thr,h) DUK_HEAPHDR_INCREF_FAST((thr),(h))
#define DUK_HEAPHDR_DECREF(thr,h) DUK_HEAPHDR_DECREF_FAST((thr),(h))
#else
#define DUK_TVAL_INCREF(thr,tv) DUK_TVAL_INCREF_SLOW((thr),(tv))
#define DUK_TVAL_DECREF(thr,tv) DUK_TVAL_DECREF_SLOW((thr),(tv))
#define DUK_HEAPHDR_INCREF(thr,h) DUK_HEAPHDR_INCREF_SLOW((thr),(h))
#define DUK_HEAPHDR_DECREF(thr,h) DUK_HEAPHDR_DECREF_SLOW((thr),(h))
#endif
/* Casting convenience. */
#define DUK_HSTRING_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) (h))
#define DUK_HSTRING_DECREF(thr,h) DUK_HEAPHDR_DECREF((thr),(duk_heaphdr *) (h))
#define DUK_HOBJECT_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) (h))
#define DUK_HOBJECT_DECREF(thr,h) DUK_HEAPHDR_DECREF((thr),(duk_heaphdr *) (h))
#define DUK_HBUFFER_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) (h))
#define DUK_HBUFFER_DECREF(thr,h) DUK_HEAPHDR_DECREF((thr),(duk_heaphdr *) (h))
#define DUK_HCOMPILEDFUNCTION_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) &(h)->obj)
#define DUK_HCOMPILEDFUNCTION_DECREF(thr,h) DUK_HEAPHDR_DECREF((thr),(duk_heaphdr *) &(h)->obj)
#define DUK_HNATIVEFUNCTION_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) &(h)->obj)
#define DUK_HNATIVEFUNCTION_DECREF(thr,h) DUK_HEAPHDR_DECREF((thr),(duk_heaphdr *) &(h)->obj)
#define DUK_HBUFFEROBJECT_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) &(h)->obj)
#define DUK_HBUFFEROBJECT_DECREF(thr,h) DUK_HEAPHDR_DECREF((thr),(duk_heaphdr *) &(h)->obj)
#define DUK_HTHREAD_INCREF(thr,h) DUK_HEAPHDR_INCREF((thr),(duk_heaphdr *) &(h)->obj)
#define DUK_HTHREAD_DECREF(thr,h) DUK_HEAPHDR_DECREF((thr),(duk_heaphdr *) &(h)->obj)
/* Convenience for some situations; the above macros don't allow NULLs
* for performance reasons.
*/
#define DUK_HOBJECT_INCREF_ALLOWNULL(thr,h) do { \
if ((h) != NULL) { \
DUK_HEAPHDR_INCREF((thr), (duk_heaphdr *) (h)); \
} \
} while (0)
#define DUK_HOBJECT_DECREF_ALLOWNULL(thr,h) do { \
if ((h) != NULL) { \
DUK_HEAPHDR_DECREF((thr), (duk_heaphdr *) (h)); \
} \
} while (0)
/*
* Macros to set a duk_tval and update refcount of the target (decref the
* old value and incref the new value if necessary). This is both performance
* and footprint critical; any changes made should be measured for size/speed.
*/
#define DUK_TVAL_SET_UNDEFINED_UPDREF_ALT0(thr,tvptr_dst) do { \
duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \
DUK_TVAL_SET_UNDEFINED(tv__dst); \
DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \
} while (0)
#define DUK_TVAL_SET_UNUSED_UPDREF_ALT0(thr,tvptr_dst) do { \
duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \
DUK_TVAL_SET_UNUSED(tv__dst); \
DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \
} while (0)
#define DUK_TVAL_SET_NULL_UPDREF_ALT0(thr,tvptr_dst) do { \
duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \
DUK_TVAL_SET_NULL(tv__dst); \
DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \
} while (0)
#define DUK_TVAL_SET_BOOLEAN_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \
DUK_TVAL_SET_BOOLEAN(tv__dst, (newval)); \
DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \
} while (0)
#define DUK_TVAL_SET_NUMBER_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \
DUK_TVAL_SET_NUMBER(tv__dst, (newval)); \
DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \
} while (0)
#define DUK_TVAL_SET_NUMBER_CHKFAST_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \
DUK_TVAL_SET_NUMBER_CHKFAST(tv__dst, (newval)); \
DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \
} while (0)
#define DUK_TVAL_SET_DOUBLE_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \
DUK_TVAL_SET_DOUBLE(tv__dst, (newval)); \
DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \
} while (0)
#define DUK_TVAL_SET_NAN_UPDREF_ALT0(thr,tvptr_dst) do { \
duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \
DUK_TVAL_SET_NAN(tv__dst); \
DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \
} while (0)
#if defined(DUK_USE_FASTINT)
#define DUK_TVAL_SET_FASTINT_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \
DUK_TVAL_SET_FASTINT(tv__dst, (newval)); \
DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \
} while (0)
#define DUK_TVAL_SET_FASTINT_I32_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \
DUK_TVAL_SET_FASTINT_I32(tv__dst, (newval)); \
DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \
} while (0)
#define DUK_TVAL_SET_FASTINT_U32_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \
DUK_TVAL_SET_FASTINT_U32(tv__dst, (newval)); \
DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \
} while (0)
#else
#define DUK_TVAL_SET_DOUBLE_CAST_UPDREF(thr,tvptr_dst,newval) \
DUK_TVAL_SET_DOUBLE_UPDREF((thr), (tvptr_dst), (duk_double_t) (newval))
#endif /* DUK_USE_FASTINT */
#define DUK_TVAL_SET_LIGHTFUNC_UPDREF_ALT0(thr,tvptr_dst,lf_v,lf_fp,lf_flags) do { \
duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \
DUK_TVAL_SET_LIGHTFUNC(tv__dst, (lf_v), (lf_fp), (lf_flags)); \
DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \
} while (0)
#define DUK_TVAL_SET_STRING_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \
DUK_TVAL_SET_STRING(tv__dst, (newval)); \
DUK_HSTRING_INCREF((thr), (newval)); \
DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \
} while (0)
#define DUK_TVAL_SET_OBJECT_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \
DUK_TVAL_SET_OBJECT(tv__dst, (newval)); \
DUK_HOBJECT_INCREF((thr), (newval)); \
DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \
} while (0)
#define DUK_TVAL_SET_BUFFER_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \
DUK_TVAL_SET_BUFFER(tv__dst, (newval)); \
DUK_HBUFFER_INCREF((thr), (newval)); \
DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \
} while (0)
#define DUK_TVAL_SET_POINTER_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; duk_tval tv__tmp; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \
DUK_TVAL_SET_POINTER(tv__dst, (newval)); \
DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \
} while (0)
/* DUK_TVAL_SET_TVAL_UPDREF() is used a lot in executor, property lookups,
* etc, so it's very important for performance. Measure when changing.
*
* NOTE: the source and destination duk_tval pointers may be the same, and
* the macros MUST deal with that correctly.
*/
/* Original idiom used, minimal code size. */
#define DUK_TVAL_SET_TVAL_UPDREF_ALT0(thr,tvptr_dst,tvptr_src) do { \
duk_tval *tv__dst, *tv__src; duk_tval tv__tmp; \
tv__dst = (tvptr_dst); tv__src = (tvptr_src); \
DUK_TVAL_SET_TVAL(&tv__tmp, tv__dst); \
DUK_TVAL_SET_TVAL(tv__dst, tv__src); \
DUK_TVAL_INCREF((thr), tv__src); \
DUK_TVAL_DECREF((thr), &tv__tmp); /* side effects */ \
} while (0)
/* Faster alternative: avoid making a temporary copy of tvptr_dst and use
* fast incref/decref macros.
*/
#define DUK_TVAL_SET_TVAL_UPDREF_ALT1(thr,tvptr_dst,tvptr_src) do { \
duk_tval *tv__dst, *tv__src; duk_heaphdr *h__obj; \
tv__dst = (tvptr_dst); tv__src = (tvptr_src); \
DUK_TVAL_INCREF_FAST((thr), tv__src); \
if (DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv__dst)) { \
h__obj = DUK_TVAL_GET_HEAPHDR(tv__dst); \
DUK_ASSERT(h__obj != NULL); \
DUK_TVAL_SET_TVAL(tv__dst, tv__src); \
DUK_HEAPHDR_DECREF_FAST((thr), h__obj); /* side effects */ \
} else { \
DUK_TVAL_SET_TVAL(tv__dst, tv__src); \
} \
} while (0)
/* XXX: no optimized variants yet */
#define DUK_TVAL_SET_UNDEFINED_UPDREF DUK_TVAL_SET_UNDEFINED_UPDREF_ALT0
#define DUK_TVAL_SET_UNUSED_UPDREF DUK_TVAL_SET_UNUSED_UPDREF_ALT0
#define DUK_TVAL_SET_NULL_UPDREF DUK_TVAL_SET_NULL_UPDREF_ALT0
#define DUK_TVAL_SET_BOOLEAN_UPDREF DUK_TVAL_SET_BOOLEAN_UPDREF_ALT0
#define DUK_TVAL_SET_NUMBER_UPDREF DUK_TVAL_SET_NUMBER_UPDREF_ALT0
#define DUK_TVAL_SET_NUMBER_CHKFAST_UPDREF DUK_TVAL_SET_NUMBER_CHKFAST_UPDREF_ALT0
#define DUK_TVAL_SET_DOUBLE_UPDREF DUK_TVAL_SET_DOUBLE_UPDREF_ALT0
#define DUK_TVAL_SET_NAN_UPDREF DUK_TVAL_SET_NAN_UPDREF_ALT0
#if defined(DUK_USE_FASTINT)
#define DUK_TVAL_SET_FASTINT_UPDREF DUK_TVAL_SET_FASTINT_UPDREF_ALT0
#define DUK_TVAL_SET_FASTINT_I32_UPDREF DUK_TVAL_SET_FASTINT_I32_UPDREF_ALT0
#define DUK_TVAL_SET_FASTINT_U32_UPDREF DUK_TVAL_SET_FASTINT_U32_UPDREF_ALT0
#else
#define DUK_TVAL_SET_FASTINT_UPDREF DUK_TVAL_SET_DOUBLE_CAST_UPDREF /* XXX: fast int-to-double */
#define DUK_TVAL_SET_FASTINT_I32_UPDREF DUK_TVAL_SET_DOUBLE_CAST_UPDREF
#define DUK_TVAL_SET_FASTINT_U32_UPDREF DUK_TVAL_SET_DOUBLE_CAST_UPDREF
#endif /* DUK_USE_FASTINT */
#define DUK_TVAL_SET_LIGHTFUNC_UPDREF DUK_TVAL_SET_LIGHTFUNC_UPDREF_ALT0
#define DUK_TVAL_SET_STRING_UPDREF DUK_TVAL_SET_STRING_UPDREF_ALT0
#define DUK_TVAL_SET_OBJECT_UPDREF DUK_TVAL_SET_OBJECT_UPDREF_ALT0
#define DUK_TVAL_SET_BUFFER_UPDREF DUK_TVAL_SET_BUFFER_UPDREF_ALT0
#define DUK_TVAL_SET_POINTER_UPDREF DUK_TVAL_SET_POINTER_UPDREF_ALT0
#if defined(DUK_USE_FAST_REFCOUNT_DEFAULT)
/* Optimized for speed. */
#define DUK_TVAL_SET_TVAL_UPDREF DUK_TVAL_SET_TVAL_UPDREF_ALT1
#define DUK_TVAL_SET_TVAL_UPDREF_FAST DUK_TVAL_SET_TVAL_UPDREF_ALT1
#define DUK_TVAL_SET_TVAL_UPDREF_SLOW DUK_TVAL_SET_TVAL_UPDREF_ALT0
#else
/* Optimized for size. */
#define DUK_TVAL_SET_TVAL_UPDREF DUK_TVAL_SET_TVAL_UPDREF_ALT0
#define DUK_TVAL_SET_TVAL_UPDREF_FAST DUK_TVAL_SET_TVAL_UPDREF_ALT0
#define DUK_TVAL_SET_TVAL_UPDREF_SLOW DUK_TVAL_SET_TVAL_UPDREF_ALT0
#endif
#else /* DUK_USE_REFERENCE_COUNTING */
#define DUK_TVAL_INCREF_FAST(thr,v) do {} while (0) /* nop */
#define DUK_TVAL_DECREF_FAST(thr,v) do {} while (0) /* nop */
#define DUK_TVAL_INCREF_SLOW(thr,v) do {} while (0) /* nop */
#define DUK_TVAL_DECREF_SLOW(thr,v) do {} while (0) /* nop */
#define DUK_TVAL_INCREF(thr,v) do {} while (0) /* nop */
#define DUK_TVAL_DECREF(thr,v) do {} while (0) /* nop */
#define DUK_HEAPHDR_INCREF_FAST(thr,h) do {} while (0) /* nop */
#define DUK_HEAPHDR_DECREF_FAST(thr,h) do {} while (0) /* nop */
#define DUK_HEAPHDR_INCREF_SLOW(thr,h) do {} while (0) /* nop */
#define DUK_HEAPHDR_DECREF_SLOW(thr,h) do {} while (0) /* nop */
#define DUK_HEAPHDR_INCREF(thr,h) do {} while (0) /* nop */
#define DUK_HEAPHDR_DECREF(thr,h) do {} while (0) /* nop */
#define DUK_HSTRING_INCREF(thr,h) do {} while (0) /* nop */
#define DUK_HSTRING_DECREF(thr,h) do {} while (0) /* nop */
#define DUK_HOBJECT_INCREF(thr,h) do {} while (0) /* nop */
#define DUK_HOBJECT_DECREF(thr,h) do {} while (0) /* nop */
#define DUK_HBUFFER_INCREF(thr,h) do {} while (0) /* nop */
#define DUK_HBUFFER_DECREF(thr,h) do {} while (0) /* nop */
#define DUK_HCOMPILEDFUNCTION_INCREF(thr,h) do {} while (0) /* nop */
#define DUK_HCOMPILEDFUNCTION_DECREF(thr,h) do {} while (0) /* nop */
#define DUK_HNATIVEFUNCTION_INCREF(thr,h) do {} while (0) /* nop */
#define DUK_HNATIVEFUNCTION_DECREF(thr,h) do {} while (0) /* nop */
#define DUK_HBUFFEROBJECT_INCREF(thr,h) do {} while (0) /* nop */
#define DUK_HBUFFEROBJECT_DECREF(thr,h) do {} while (0) /* nop */
#define DUK_HTHREAD_INCREF(thr,h) do {} while (0) /* nop */
#define DUK_HTHREAD_DECREF(thr,h) do {} while (0) /* nop */
#define DUK_HOBJECT_INCREF_ALLOWNULL(thr,h) do {} while (0) /* nop */
#define DUK_HOBJECT_DECREF_ALLOWNULL(thr,h) do {} while (0) /* nop */
#define DUK_TVAL_SET_UNDEFINED_UPDREF_ALT0(thr,tvptr_dst) do { \
duk_tval *tv__dst; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_UNDEFINED(tv__dst); \
DUK_UNREF((thr)); \
} while (0)
#define DUK_TVAL_SET_UNUSED_UPDREF_ALT0(thr,tvptr_dst) do { \
duk_tval *tv__dst; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_UNUSED(tv__dst); \
DUK_UNREF((thr)); \
} while (0)
#define DUK_TVAL_SET_NULL_UPDREF_ALT0(thr,tvptr_dst) do { \
duk_tval *tv__dst; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_NULL(tv__dst); \
DUK_UNREF((thr)); \
} while (0)
#define DUK_TVAL_SET_BOOLEAN_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_BOOLEAN(tv__dst, (newval)); \
DUK_UNREF((thr)); \
} while (0)
#define DUK_TVAL_SET_NUMBER_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_NUMBER(tv__dst, (newval)); \
DUK_UNREF((thr)); \
} while (0)
#define DUK_TVAL_SET_NUMBER_CHKFAST_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_NUMBER_CHKFAST(tv__dst, (newval)); \
DUK_UNREF((thr)); \
} while (0)
#define DUK_TVAL_SET_DOUBLE_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_DOUBLE(tv__dst, (newval)); \
DUK_UNREF((thr)); \
} while (0)
#define DUK_TVAL_SET_NAN_UPDREF_ALT0(thr,tvptr_dst) do { \
duk_tval *tv__dst; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_NAN(tv__dst); \
DUK_UNREF((thr)); \
} while (0)
#if defined(DUK_USE_FASTINT)
#define DUK_TVAL_SET_FASTINT_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_FASTINT(tv__dst, (newval)); \
DUK_UNREF((thr)); \
} while (0)
#define DUK_TVAL_SET_FASTINT_I32_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_FASTINT_I32(tv__dst, (newval)); \
DUK_UNREF((thr)); \
} while (0)
#define DUK_TVAL_SET_FASTINT_U32_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_FASTINT_U32(tv__dst, (newval)); \
DUK_UNREF((thr)); \
} while (0)
#else
#define DUK_TVAL_SET_DOUBLE_CAST_UPDREF(thr,tvptr_dst,newval) \
DUK_TVAL_SET_DOUBLE_UPDREF((thr), (tvptr_dst), (duk_double_t) (newval))
#endif /* DUK_USE_FASTINT */
#define DUK_TVAL_SET_LIGHTFUNC_UPDREF_ALT0(thr,tvptr_dst,lf_v,lf_fp,lf_flags) do { \
duk_tval *tv__dst; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_LIGHTFUNC(tv__dst, (lf_v), (lf_fp), (lf_flags)); \
DUK_UNREF((thr)); \
} while (0)
#define DUK_TVAL_SET_STRING_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_STRING(tv__dst, (newval)); \
DUK_UNREF((thr)); \
} while (0)
#define DUK_TVAL_SET_OBJECT_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_OBJECT(tv__dst, (newval)); \
DUK_UNREF((thr)); \
} while (0)
#define DUK_TVAL_SET_BUFFER_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_BUFFER(tv__dst, (newval)); \
DUK_UNREF((thr)); \
} while (0)
#define DUK_TVAL_SET_POINTER_UPDREF_ALT0(thr,tvptr_dst,newval) do { \
duk_tval *tv__dst; tv__dst = (tvptr_dst); \
DUK_TVAL_SET_POINTER(tv__dst, (newval)); \
DUK_UNREF((thr)); \
} while (0)
#define DUK_TVAL_SET_TVAL_UPDREF_ALT0(thr,tvptr_dst,tvptr_src) do { \
duk_tval *tv__dst, *tv__src; \
tv__dst = (tvptr_dst); tv__src = (tvptr_src); \
DUK_TVAL_SET_TVAL(tv__dst, tv__src); \
DUK_UNREF((thr)); \
} while (0)
#define DUK_TVAL_SET_UNDEFINED_UPDREF DUK_TVAL_SET_UNDEFINED_UPDREF_ALT0
#define DUK_TVAL_SET_UNUSED_UPDREF DUK_TVAL_SET_UNUSED_UPDREF_ALT0
#define DUK_TVAL_SET_NULL_UPDREF DUK_TVAL_SET_NULL_UPDREF_ALT0
#define DUK_TVAL_SET_BOOLEAN_UPDREF DUK_TVAL_SET_BOOLEAN_UPDREF_ALT0
#define DUK_TVAL_SET_NUMBER_UPDREF DUK_TVAL_SET_NUMBER_UPDREF_ALT0
#define DUK_TVAL_SET_NUMBER_CHKFAST_UPDREF DUK_TVAL_SET_NUMBER_CHKFAST_UPDREF_ALT0
#define DUK_TVAL_SET_DOUBLE_UPDREF DUK_TVAL_SET_DOUBLE_UPDREF_ALT0
#define DUK_TVAL_SET_NAN_UPDREF DUK_TVAL_SET_NAN_UPDREF_ALT0
#if defined(DUK_USE_FASTINT)
#define DUK_TVAL_SET_FASTINT_UPDREF DUK_TVAL_SET_FASTINT_UPDREF_ALT0
#define DUK_TVAL_SET_FASTINT_I32_UPDREF DUK_TVAL_SET_FASTINT_I32_UPDREF_ALT0
#define DUK_TVAL_SET_FASTINT_U32_UPDREF DUK_TVAL_SET_FASTINT_U32_UPDREF_ALT0
#else
#define DUK_TVAL_SET_FASTINT_UPDREF DUK_TVAL_SET_DOUBLE_CAST_UPDREF /* XXX: fast-int-to-double */
#define DUK_TVAL_SET_FASTINT_I32_UPDREF DUK_TVAL_SET_DOUBLE_CAST_UPDREF
#define DUK_TVAL_SET_FASTINT_U32_UPDREF DUK_TVAL_SET_DOUBLE_CAST_UPDREF
#endif /* DUK_USE_FASTINT */
#define DUK_TVAL_SET_LIGHTFUNC_UPDREF DUK_TVAL_SET_LIGHTFUNC_UPDREF_ALT0
#define DUK_TVAL_SET_STRING_UPDREF DUK_TVAL_SET_STRING_UPDREF_ALT0
#define DUK_TVAL_SET_OBJECT_UPDREF DUK_TVAL_SET_OBJECT_UPDREF_ALT0
#define DUK_TVAL_SET_BUFFER_UPDREF DUK_TVAL_SET_BUFFER_UPDREF_ALT0
#define DUK_TVAL_SET_POINTER_UPDREF DUK_TVAL_SET_POINTER_UPDREF_ALT0
#define DUK_TVAL_SET_TVAL_UPDREF DUK_TVAL_SET_TVAL_UPDREF_ALT0
#define DUK_TVAL_SET_TVAL_UPDREF_FAST DUK_TVAL_SET_TVAL_UPDREF_ALT0
#define DUK_TVAL_SET_TVAL_UPDREF_SLOW DUK_TVAL_SET_TVAL_UPDREF_ALT0
#endif /* DUK_USE_REFERENCE_COUNTING */
#endif /* DUK_HEAPHDR_H_INCLUDED */
#line 1 "duk_api_internal.h"
/*
* Internal API calls which have (stack and other) semantics similar
* to the public API.
*/
#ifndef DUK_API_INTERNAL_H_INCLUDED
#define DUK_API_INTERNAL_H_INCLUDED
/* duk_push_sprintf constants */
#define DUK_PUSH_SPRINTF_INITIAL_SIZE 256L
#define DUK_PUSH_SPRINTF_SANITY_LIMIT (1L * 1024L * 1024L * 1024L)
/* Flag ORed to err_code to indicate __FILE__ / __LINE__ is not
* blamed as source of error for error fileName / lineNumber.
*/
#define DUK_ERRCODE_FLAG_NOBLAME_FILELINE (1L << 24)
/* Valstack resize flags */
#define DUK_VSRESIZE_FLAG_SHRINK (1 << 0)
#define DUK_VSRESIZE_FLAG_COMPACT (1 << 1)
#define DUK_VSRESIZE_FLAG_THROW (1 << 2)
/* Current convention is to use duk_size_t for value stack sizes and global indices,
* and duk_idx_t for local frame indices.
*/
DUK_INTERNAL_DECL
duk_bool_t duk_valstack_resize_raw(duk_context *ctx,
duk_size_t min_new_size,
duk_small_uint_t flags);
#if defined(DUK_USE_VERBOSE_ERRORS) && defined(DUK_USE_PARANOID_ERRORS)
DUK_INTERNAL_DECL const char *duk_get_type_name(duk_context *ctx, duk_idx_t index);
#endif
DUK_INTERNAL_DECL duk_tval *duk_get_tval(duk_context *ctx, duk_idx_t index);
DUK_INTERNAL_DECL duk_tval *duk_require_tval(duk_context *ctx, duk_idx_t index);
DUK_INTERNAL_DECL void duk_push_tval(duk_context *ctx, duk_tval *tv);
/* Push the current 'this' binding; throw TypeError if binding is not object
* coercible (CheckObjectCoercible).
*/
DUK_INTERNAL_DECL void duk_push_this_check_object_coercible(duk_context *ctx);
/* duk_push_this() + CheckObjectCoercible() + duk_to_object() */
DUK_INTERNAL_DECL duk_hobject *duk_push_this_coercible_to_object(duk_context *ctx);
/* duk_push_this() + CheckObjectCoercible() + duk_to_string() */
DUK_INTERNAL_DECL duk_hstring *duk_push_this_coercible_to_string(duk_context *ctx);
/* Get a borrowed duk_tval pointer to the current 'this' binding. Caller must
* make sure there's an active callstack entry. Note that the returned pointer
* is unstable with regards to side effects.
*/
DUK_INTERNAL_DECL duk_tval *duk_get_borrowed_this_tval(duk_context *ctx);
/* XXX: add fastint support? */
#define duk_push_u64(ctx,val) \
duk_push_number((ctx), (duk_double_t) (val))
#define duk_push_i64(ctx,val) \
duk_push_number((ctx), (duk_double_t) (val))
/* duk_push_(u)int() is guaranteed to support at least (un)signed 32-bit range */
#define duk_push_u32(ctx,val) \
duk_push_uint((ctx), (duk_uint_t) (val))
#define duk_push_i32(ctx,val) \
duk_push_int((ctx), (duk_int_t) (val))
/* sometimes stack and array indices need to go on the stack */
#define duk_push_idx(ctx,val) \
duk_push_int((ctx), (duk_int_t) (val))
#define duk_push_uarridx(ctx,val) \
duk_push_uint((ctx), (duk_uint_t) (val))
#define duk_push_size_t(ctx,val) \
duk_push_uint((ctx), (duk_uint_t) (val)) /* XXX: assumed to fit for now */
DUK_INTERNAL_DECL duk_hstring *duk_get_hstring(duk_context *ctx, duk_idx_t index);
DUK_INTERNAL_DECL duk_hobject *duk_get_hobject(duk_context *ctx, duk_idx_t index);
DUK_INTERNAL_DECL duk_hbuffer *duk_get_hbuffer(duk_context *ctx, duk_idx_t index);
DUK_INTERNAL_DECL duk_hthread *duk_get_hthread(duk_context *ctx, duk_idx_t index);
DUK_INTERNAL_DECL duk_hcompiledfunction *duk_get_hcompiledfunction(duk_context *ctx, duk_idx_t index);
DUK_INTERNAL_DECL duk_hnativefunction *duk_get_hnativefunction(duk_context *ctx, duk_idx_t index);
DUK_INTERNAL_DECL duk_hobject *duk_get_hobject_with_class(duk_context *ctx, duk_idx_t index, duk_small_uint_t classnum);
#if 0 /* This would be pointless: unexpected type and lightfunc would both return NULL */
DUK_INTERNAL_DECL duk_hobject *duk_get_hobject_or_lfunc(duk_context *ctx, duk_idx_t index);
#endif
DUK_INTERNAL_DECL duk_hobject *duk_get_hobject_or_lfunc_coerce(duk_context *ctx, duk_idx_t index);
#if 0 /*unused*/
DUK_INTERNAL_DECL void *duk_get_voidptr(duk_context *ctx, duk_idx_t index);
#endif
DUK_INTERNAL_DECL duk_hstring *duk_to_hstring(duk_context *ctx, duk_idx_t index);
#if defined(DUK_USE_DEBUGGER_SUPPORT) /* only needed by debugger for now */
DUK_INTERNAL_DECL duk_hstring *duk_safe_to_hstring(duk_context *ctx, duk_idx_t index);
#endif
DUK_INTERNAL_DECL void duk_to_object_class_string_top(duk_context *ctx);
#if !defined(DUK_USE_PARANOID_ERRORS)
DUK_INTERNAL_DECL void duk_push_hobject_class_string(duk_context *ctx, duk_hobject *h);
#endif
DUK_INTERNAL_DECL duk_int_t duk_to_int_clamped_raw(duk_context *ctx, duk_idx_t index, duk_int_t minval, duk_int_t maxval, duk_bool_t *out_clamped); /* out_clamped=NULL, RangeError if outside range */
DUK_INTERNAL_DECL duk_int_t duk_to_int_clamped(duk_context *ctx, duk_idx_t index, duk_int_t minval, duk_int_t maxval);
DUK_INTERNAL_DECL duk_int_t duk_to_int_check_range(duk_context *ctx, duk_idx_t index, duk_int_t minval, duk_int_t maxval);
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL_DECL duk_uint8_t duk_to_uint8clamped(duk_context *ctx, duk_idx_t index);
#endif
DUK_INTERNAL_DECL duk_hstring *duk_require_hstring(duk_context *ctx, duk_idx_t index);
DUK_INTERNAL_DECL duk_hobject *duk_require_hobject(duk_context *ctx, duk_idx_t index);
DUK_INTERNAL_DECL duk_hbuffer *duk_require_hbuffer(duk_context *ctx, duk_idx_t index);
DUK_INTERNAL_DECL duk_hthread *duk_require_hthread(duk_context *ctx, duk_idx_t index);
DUK_INTERNAL_DECL duk_hcompiledfunction *duk_require_hcompiledfunction(duk_context *ctx, duk_idx_t index);
DUK_INTERNAL_DECL duk_hnativefunction *duk_require_hnativefunction(duk_context *ctx, duk_idx_t index);
DUK_INTERNAL_DECL duk_hobject *duk_require_hobject_with_class(duk_context *ctx, duk_idx_t index, duk_small_uint_t classnum);
DUK_INTERNAL_DECL duk_hobject *duk_require_hobject_or_lfunc(duk_context *ctx, duk_idx_t index);
DUK_INTERNAL_DECL duk_hobject *duk_require_hobject_or_lfunc_coerce(duk_context *ctx, duk_idx_t index);
DUK_INTERNAL_DECL void duk_push_hstring(duk_context *ctx, duk_hstring *h);
DUK_INTERNAL_DECL void duk_push_hstring_stridx(duk_context *ctx, duk_small_int_t stridx);
DUK_INTERNAL_DECL void duk_push_hobject(duk_context *ctx, duk_hobject *h);
DUK_INTERNAL_DECL void duk_push_hbuffer(duk_context *ctx, duk_hbuffer *h);
#define duk_push_hthread(ctx,h) \
duk_push_hobject((ctx), (duk_hobject *) (h))
#define duk_push_hcompiledfunction(ctx,h) \
duk_push_hobject((ctx), (duk_hobject *) (h))
#define duk_push_hnativefunction(ctx,h) \
duk_push_hobject((ctx), (duk_hobject *) (h))
DUK_INTERNAL_DECL void duk_push_hobject_bidx(duk_context *ctx, duk_small_int_t builtin_idx);
DUK_INTERNAL_DECL duk_idx_t duk_push_object_helper(duk_context *ctx, duk_uint_t hobject_flags_and_class, duk_small_int_t prototype_bidx);
DUK_INTERNAL_DECL duk_idx_t duk_push_object_helper_proto(duk_context *ctx, duk_uint_t hobject_flags_and_class, duk_hobject *proto);
DUK_INTERNAL_DECL duk_idx_t duk_push_object_internal(duk_context *ctx);
DUK_INTERNAL_DECL duk_idx_t duk_push_compiledfunction(duk_context *ctx);
DUK_INTERNAL_DECL void duk_push_c_function_noexotic(duk_context *ctx, duk_c_function func, duk_int_t nargs);
DUK_INTERNAL_DECL void duk_push_c_function_noconstruct_noexotic(duk_context *ctx, duk_c_function func, duk_int_t nargs);
DUK_INTERNAL_DECL void duk_push_string_funcptr(duk_context *ctx, duk_uint8_t *ptr, duk_size_t sz);
DUK_INTERNAL_DECL void duk_push_lightfunc_name(duk_context *ctx, duk_tval *tv);
DUK_INTERNAL_DECL void duk_push_lightfunc_tostring(duk_context *ctx, duk_tval *tv);
DUK_INTERNAL_DECL duk_hbufferobject *duk_push_bufferobject_raw(duk_context *ctx, duk_uint_t hobject_flags_and_class, duk_small_int_t prototype_bidx);
#if !defined(DUK_USE_PARANOID_ERRORS)
DUK_INTERNAL_DECL const char *duk_push_string_readable(duk_context *ctx, duk_idx_t index);
DUK_INTERNAL_DECL const char *duk_push_string_tval_readable(duk_context *ctx, duk_tval *tv);
#endif
DUK_INTERNAL_DECL duk_bool_t duk_get_prop_stridx(duk_context *ctx, duk_idx_t obj_index, duk_small_int_t stridx); /* [] -> [val] */
DUK_INTERNAL_DECL duk_bool_t duk_put_prop_stridx(duk_context *ctx, duk_idx_t obj_index, duk_small_int_t stridx); /* [val] -> [] */
DUK_INTERNAL_DECL duk_bool_t duk_del_prop_stridx(duk_context *ctx, duk_idx_t obj_index, duk_small_int_t stridx); /* [] -> [] */
DUK_INTERNAL_DECL duk_bool_t duk_has_prop_stridx(duk_context *ctx, duk_idx_t obj_index, duk_small_int_t stridx); /* [] -> [] */
DUK_INTERNAL_DECL duk_bool_t duk_get_prop_stridx_boolean(duk_context *ctx, duk_idx_t obj_index, duk_small_int_t stridx, duk_bool_t *out_has_prop); /* [] -> [] */
DUK_INTERNAL_DECL void duk_xdef_prop(duk_context *ctx, duk_idx_t obj_index, duk_small_uint_t desc_flags); /* [key val] -> [] */
DUK_INTERNAL_DECL void duk_xdef_prop_index(duk_context *ctx, duk_idx_t obj_index, duk_uarridx_t arr_index, duk_small_uint_t desc_flags); /* [val] -> [] */
DUK_INTERNAL_DECL void duk_xdef_prop_stridx(duk_context *ctx, duk_idx_t obj_index, duk_small_int_t stridx, duk_small_uint_t desc_flags); /* [val] -> [] */
DUK_INTERNAL_DECL void duk_xdef_prop_stridx_builtin(duk_context *ctx, duk_idx_t obj_index, duk_small_int_t stridx, duk_small_int_t builtin_idx, duk_small_uint_t desc_flags); /* [] -> [] */
DUK_INTERNAL_DECL void duk_xdef_prop_stridx_thrower(duk_context *ctx, duk_idx_t obj_index, duk_small_int_t stridx, duk_small_uint_t desc_flags); /* [] -> [] */
/* These are macros for now, but could be separate functions to reduce code
* footprint (check call site count before refactoring).
*/
#define duk_xdef_prop_wec(ctx,obj_index) \
duk_xdef_prop((ctx), (obj_index), DUK_PROPDESC_FLAGS_WEC)
#define duk_xdef_prop_index_wec(ctx,obj_index,arr_index) \
duk_xdef_prop_index((ctx), (obj_index), (arr_index), DUK_PROPDESC_FLAGS_WEC)
#define duk_xdef_prop_stridx_wec(ctx,obj_index,stridx) \
duk_xdef_prop_stridx((ctx), (obj_index), (stridx), DUK_PROPDESC_FLAGS_WEC)
/* Set object 'length'. */
DUK_INTERNAL_DECL void duk_set_length(duk_context *ctx, duk_idx_t index, duk_size_t length);
/* Raw internal valstack access macros: access is unsafe so call site
* must have a guarantee that the index is valid. When that is the case,
* using these macro results in faster and smaller code than duk_get_tval().
* Both 'ctx' and 'idx' are evaluted multiple times, but only for asserts.
*/
#define DUK_ASSERT_VALID_NEGIDX(ctx,idx) \
(DUK_ASSERT_EXPR((idx) < 0), DUK_ASSERT_EXPR(duk_is_valid_index((ctx), (idx))))
#define DUK_ASSERT_VALID_POSIDX(ctx,idx) \
(DUK_ASSERT_EXPR((idx) >= 0), DUK_ASSERT_EXPR(duk_is_valid_index((ctx), (idx))))
#define DUK_GET_TVAL_NEGIDX(ctx,idx) \
(DUK_ASSERT_VALID_NEGIDX((ctx),(idx)), ((duk_hthread *) (ctx))->valstack_top + (idx))
#define DUK_GET_TVAL_POSIDX(ctx,idx) \
(DUK_ASSERT_VALID_POSIDX((ctx),(idx)), ((duk_hthread *) (ctx))->valstack_bottom + (idx))
#define DUK_GET_HOBJECT_NEGIDX(ctx,idx) \
(DUK_ASSERT_VALID_NEGIDX((ctx),(idx)), DUK_TVAL_GET_OBJECT(((duk_hthread *) (ctx))->valstack_top + (idx)))
#define DUK_GET_HOBJECT_POSIDX(ctx,idx) \
(DUK_ASSERT_VALID_POSIDX((ctx),(idx)), DUK_TVAL_GET_OBJECT(((duk_hthread *) (ctx))->valstack_bottom + (idx)))
#endif /* DUK_API_INTERNAL_H_INCLUDED */
#line 1 "duk_hstring.h"
/*
* Heap string representation.
*
* Strings are byte sequences ordinarily stored in extended UTF-8 format,
* allowing values larger than the official UTF-8 range (used internally)
* and also allowing UTF-8 encoding of surrogate pairs (CESU-8 format).
* Strings may also be invalid UTF-8 altogether which is the case e.g. with
* strings used as internal property names and raw buffers converted to
* strings. In such cases the 'clen' field contains an inaccurate value.
*
* Ecmascript requires support for 32-bit long strings. However, since each
* 16-bit codepoint can take 3 bytes in CESU-8, this representation can only
* support about 1.4G codepoint long strings in extreme cases. This is not
* really a practical issue.
*/
#ifndef DUK_HSTRING_H_INCLUDED
#define DUK_HSTRING_H_INCLUDED
/* Impose a maximum string length for now. Restricted artificially to
* ensure adding a heap header length won't overflow size_t. The limit
* should be synchronized with DUK_HBUFFER_MAX_BYTELEN.
*
* E5.1 makes provisions to support strings longer than 4G characters.
* This limit should be eliminated on 64-bit platforms (and increased
* closer to maximum support on 32-bit platforms).
*/
#if defined(DUK_USE_STRLEN16)
#define DUK_HSTRING_MAX_BYTELEN (0x0000ffffUL)
#else
#define DUK_HSTRING_MAX_BYTELEN (0x7fffffffUL)
#endif
/* XXX: could add flags for "is valid CESU-8" (Ecmascript compatible strings),
* "is valid UTF-8", "is valid extended UTF-8" (internal strings are not,
* regexp bytecode is), and "contains non-BMP characters". These are not
* needed right now.
*/
#define DUK_HSTRING_FLAG_ASCII DUK_HEAPHDR_USER_FLAG(0) /* string is ASCII, clen == blen */
#define DUK_HSTRING_FLAG_ARRIDX DUK_HEAPHDR_USER_FLAG(1) /* string is a valid array index */
#define DUK_HSTRING_FLAG_INTERNAL DUK_HEAPHDR_USER_FLAG(2) /* string is internal */
#define DUK_HSTRING_FLAG_RESERVED_WORD DUK_HEAPHDR_USER_FLAG(3) /* string is a reserved word (non-strict) */
#define DUK_HSTRING_FLAG_STRICT_RESERVED_WORD DUK_HEAPHDR_USER_FLAG(4) /* string is a reserved word (strict) */
#define DUK_HSTRING_FLAG_EVAL_OR_ARGUMENTS DUK_HEAPHDR_USER_FLAG(5) /* string is 'eval' or 'arguments' */
#define DUK_HSTRING_FLAG_EXTDATA DUK_HEAPHDR_USER_FLAG(6) /* string data is external (duk_hstring_external) */
#define DUK_HSTRING_HAS_ASCII(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_ASCII)
#define DUK_HSTRING_HAS_ARRIDX(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_ARRIDX)
#define DUK_HSTRING_HAS_INTERNAL(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_INTERNAL)
#define DUK_HSTRING_HAS_RESERVED_WORD(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_RESERVED_WORD)
#define DUK_HSTRING_HAS_STRICT_RESERVED_WORD(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_STRICT_RESERVED_WORD)
#define DUK_HSTRING_HAS_EVAL_OR_ARGUMENTS(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_EVAL_OR_ARGUMENTS)
#define DUK_HSTRING_HAS_EXTDATA(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_EXTDATA)
#define DUK_HSTRING_SET_ASCII(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_ASCII)
#define DUK_HSTRING_SET_ARRIDX(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_ARRIDX)
#define DUK_HSTRING_SET_INTERNAL(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_INTERNAL)
#define DUK_HSTRING_SET_RESERVED_WORD(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_RESERVED_WORD)
#define DUK_HSTRING_SET_STRICT_RESERVED_WORD(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_STRICT_RESERVED_WORD)
#define DUK_HSTRING_SET_EVAL_OR_ARGUMENTS(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_EVAL_OR_ARGUMENTS)
#define DUK_HSTRING_SET_EXTDATA(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_EXTDATA)
#define DUK_HSTRING_CLEAR_ASCII(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_ASCII)
#define DUK_HSTRING_CLEAR_ARRIDX(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_ARRIDX)
#define DUK_HSTRING_CLEAR_INTERNAL(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_INTERNAL)
#define DUK_HSTRING_CLEAR_RESERVED_WORD(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_RESERVED_WORD)
#define DUK_HSTRING_CLEAR_STRICT_RESERVED_WORD(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_STRICT_RESERVED_WORD)
#define DUK_HSTRING_CLEAR_EVAL_OR_ARGUMENTS(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_EVAL_OR_ARGUMENTS)
#define DUK_HSTRING_CLEAR_EXTDATA(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HSTRING_FLAG_EXTDATA)
#if 0 /* Slightly smaller code without explicit flag, but explicit flag
* is very useful when 'clen' is dropped.
*/
#define DUK_HSTRING_IS_ASCII(x) (DUK_HSTRING_GET_BYTELEN((x)) == DUK_HSTRING_GET_CHARLEN((x)))
#endif
#define DUK_HSTRING_IS_ASCII(x) DUK_HSTRING_HAS_ASCII((x))
#define DUK_HSTRING_IS_EMPTY(x) (DUK_HSTRING_GET_BYTELEN((x)) == 0)
#if defined(DUK_USE_STRHASH16)
#define DUK_HSTRING_GET_HASH(x) ((x)->hdr.h_flags >> 16)
#define DUK_HSTRING_SET_HASH(x,v) do { \
(x)->hdr.h_flags = ((x)->hdr.h_flags & 0x0000ffffUL) | ((v) << 16); \
} while (0)
#else
#define DUK_HSTRING_GET_HASH(x) ((x)->hash)
#define DUK_HSTRING_SET_HASH(x,v) do { \
(x)->hash = (v); \
} while (0)
#endif
#if defined(DUK_USE_STRLEN16)
#define DUK_HSTRING_GET_BYTELEN(x) ((x)->hdr.h_strextra16)
#define DUK_HSTRING_SET_BYTELEN(x,v) do { \
(x)->hdr.h_strextra16 = (v); \
} while (0)
#if defined(DUK_USE_HSTRING_CLEN)
#define DUK_HSTRING_GET_CHARLEN(x) ((x)->clen16)
#define DUK_HSTRING_SET_CHARLEN(x,v) do { \
(x)->clen16 = (v); \
} while (0)
#else
#define DUK_HSTRING_GET_CHARLEN(x) duk_hstring_get_charlen((x))
#define DUK_HSTRING_SET_CHARLEN(x,v) do { \
DUK_ASSERT(0); /* should never be called */ \
} while (0)
#endif
#else
#define DUK_HSTRING_GET_BYTELEN(x) ((x)->blen)
#define DUK_HSTRING_SET_BYTELEN(x,v) do { \
(x)->blen = (v); \
} while (0)
#define DUK_HSTRING_GET_CHARLEN(x) ((x)->clen)
#define DUK_HSTRING_SET_CHARLEN(x,v) do { \
(x)->clen = (v); \
} while (0)
#endif
#if defined(DUK_USE_HSTRING_EXTDATA)
#define DUK_HSTRING_GET_EXTDATA(x) \
((x)->extdata)
#define DUK_HSTRING_GET_DATA(x) \
(DUK_HSTRING_HAS_EXTDATA((x)) ? \
DUK_HSTRING_GET_EXTDATA((const duk_hstring_external *) (x)) : ((const duk_uint8_t *) ((x) + 1)))
#else
#define DUK_HSTRING_GET_DATA(x) \
((const duk_uint8_t *) ((x) + 1))
#endif
#define DUK_HSTRING_GET_DATA_END(x) \
(DUK_HSTRING_GET_DATA((x)) + (x)->blen)
/* marker value; in E5 2^32-1 is not a valid array index (2^32-2 is highest valid) */
#define DUK_HSTRING_NO_ARRAY_INDEX (0xffffffffUL)
/* get array index related to string (or return DUK_HSTRING_NO_ARRAY_INDEX);
* avoids helper call if string has no array index value.
*/
#define DUK_HSTRING_GET_ARRIDX_FAST(h) \
(DUK_HSTRING_HAS_ARRIDX((h)) ? duk_js_to_arrayindex_string_helper((h)) : DUK_HSTRING_NO_ARRAY_INDEX)
/* slower but more compact variant */
#define DUK_HSTRING_GET_ARRIDX_SLOW(h) \
(duk_js_to_arrayindex_string_helper((h)))
/*
* Misc
*/
struct duk_hstring {
/* Smaller heaphdr than for other objects, because strings are held
* in string intern table which requires no link pointers. Much of
* the 32-bit flags field is unused by flags, so we can stuff a 16-bit
* field in there.
*/
duk_heaphdr_string hdr;
/* Note: we could try to stuff a partial hash (e.g. 16 bits) into the
* shared heap header. Good hashing needs more hash bits though.
*/
/* string hash */
#if defined(DUK_USE_STRHASH16)
/* If 16-bit hash is in use, stuff it into duk_heaphdr_string flags. */
#else
duk_uint32_t hash;
#endif
/* length in bytes (not counting NUL term) */
#if defined(DUK_USE_STRLEN16)
/* placed in duk_heaphdr_string */
#else
duk_uint32_t blen;
#endif
/* length in codepoints (must be E5 compatible) */
#if defined(DUK_USE_STRLEN16)
#if defined(DUK_USE_HSTRING_CLEN)
duk_uint16_t clen16;
#else
/* computed live */
#endif
#else
duk_uint32_t clen;
#endif
/*
* String value of 'blen+1' bytes follows (+1 for NUL termination
* convenience for C API). No alignment needs to be guaranteed
* for strings, but fields above should guarantee alignment-by-4
* (but not alignment-by-8).
*/
};
/* The external string struct is defined even when the feature is inactive. */
struct duk_hstring_external {
duk_hstring str;
/*
* For an external string, the NUL-terminated string data is stored
* externally. The user must guarantee that data behind this pointer
* doesn't change while it's used.
*/
const duk_uint8_t *extdata;
};
/*
* Prototypes
*/
DUK_INTERNAL_DECL duk_ucodepoint_t duk_hstring_char_code_at_raw(duk_hthread *thr, duk_hstring *h, duk_uint_t pos);
#if !defined(DUK_USE_HSTRING_CLEN)
DUK_INTERNAL_DECL duk_size_t duk_hstring_get_charlen(duk_hstring *h);
#endif
#endif /* DUK_HSTRING_H_INCLUDED */
#line 1 "duk_hobject.h"
/*
* Heap object representation.
*
* Heap objects are used for Ecmascript objects, arrays, and functions,
* but also for internal control like declarative and object environment
* records. Compiled functions, native functions, and threads are also
* objects but with an extended C struct.
*
* Objects provide the required Ecmascript semantics and exotic behaviors
* especially for property access.
*
* Properties are stored in three conceptual parts:
*
* 1. A linear 'entry part' contains ordered key-value-attributes triples
* and is the main method of string properties.
*
* 2. An optional linear 'array part' is used for array objects to store a
* (dense) range of [0,N[ array indexed entries with default attributes
* (writable, enumerable, configurable). If the array part would become
* sparse or non-default attributes are required, the array part is
* abandoned and moved to the 'entry part'.
*
* 3. An optional 'hash part' is used to optimize lookups of the entry
* part; it is used only for objects with sufficiently many properties
* and can be abandoned without loss of information.
*
* These three conceptual parts are stored in a single memory allocated area.
* This minimizes memory allocation overhead but also means that all three
* parts are resized together, and makes property access a bit complicated.
*/
#ifndef DUK_HOBJECT_H_INCLUDED
#define DUK_HOBJECT_H_INCLUDED
/* Object flag. There are currently 26 flag bits available. Make sure
* this stays in sync with debugger object inspection code.
*/
#define DUK_HOBJECT_FLAG_EXTENSIBLE DUK_HEAPHDR_USER_FLAG(0) /* object is extensible */
#define DUK_HOBJECT_FLAG_CONSTRUCTABLE DUK_HEAPHDR_USER_FLAG(1) /* object is constructable */
#define DUK_HOBJECT_FLAG_BOUND DUK_HEAPHDR_USER_FLAG(2) /* object established using Function.prototype.bind() */
#define DUK_HOBJECT_FLAG_COMPILEDFUNCTION DUK_HEAPHDR_USER_FLAG(4) /* object is a compiled function (duk_hcompiledfunction) */
#define DUK_HOBJECT_FLAG_NATIVEFUNCTION DUK_HEAPHDR_USER_FLAG(5) /* object is a native function (duk_hnativefunction) */
#define DUK_HOBJECT_FLAG_BUFFEROBJECT DUK_HEAPHDR_USER_FLAG(6) /* object is a buffer object (duk_hbufferobject) (always exotic) */
#define DUK_HOBJECT_FLAG_THREAD DUK_HEAPHDR_USER_FLAG(7) /* object is a thread (duk_hthread) */
#define DUK_HOBJECT_FLAG_ARRAY_PART DUK_HEAPHDR_USER_FLAG(8) /* object has an array part (a_size may still be 0) */
#define DUK_HOBJECT_FLAG_STRICT DUK_HEAPHDR_USER_FLAG(9) /* function: function object is strict */
#define DUK_HOBJECT_FLAG_NOTAIL DUK_HEAPHDR_USER_FLAG(10) /* function: function must not be tail called */
#define DUK_HOBJECT_FLAG_NEWENV DUK_HEAPHDR_USER_FLAG(11) /* function: create new environment when called (see duk_hcompiledfunction) */
#define DUK_HOBJECT_FLAG_NAMEBINDING DUK_HEAPHDR_USER_FLAG(12) /* function: create binding for func name (function templates only, used for named function expressions) */
#define DUK_HOBJECT_FLAG_CREATEARGS DUK_HEAPHDR_USER_FLAG(13) /* function: create an arguments object on function call */
#define DUK_HOBJECT_FLAG_ENVRECCLOSED DUK_HEAPHDR_USER_FLAG(14) /* envrec: (declarative) record is closed */
#define DUK_HOBJECT_FLAG_EXOTIC_ARRAY DUK_HEAPHDR_USER_FLAG(15) /* 'Array' object, array length and index exotic behavior */
#define DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ DUK_HEAPHDR_USER_FLAG(16) /* 'String' object, array index exotic behavior */
#define DUK_HOBJECT_FLAG_EXOTIC_ARGUMENTS DUK_HEAPHDR_USER_FLAG(17) /* 'Arguments' object and has arguments exotic behavior (non-strict callee) */
#define DUK_HOBJECT_FLAG_EXOTIC_DUKFUNC DUK_HEAPHDR_USER_FLAG(18) /* Duktape/C (nativefunction) object, exotic 'length' */
#define DUK_HOBJECT_FLAG_EXOTIC_PROXYOBJ DUK_HEAPHDR_USER_FLAG(19) /* 'Proxy' object */
#define DUK_HOBJECT_FLAG_CLASS_BASE DUK_HEAPHDR_USER_FLAG_NUMBER(20)
#define DUK_HOBJECT_FLAG_CLASS_BITS 5
#define DUK_HOBJECT_GET_CLASS_NUMBER(h) \
DUK_HEAPHDR_GET_FLAG_RANGE(&(h)->hdr, DUK_HOBJECT_FLAG_CLASS_BASE, DUK_HOBJECT_FLAG_CLASS_BITS)
#define DUK_HOBJECT_SET_CLASS_NUMBER(h,v) \
DUK_HEAPHDR_SET_FLAG_RANGE(&(h)->hdr, DUK_HOBJECT_FLAG_CLASS_BASE, DUK_HOBJECT_FLAG_CLASS_BITS, (v))
#define DUK_HOBJECT_GET_CLASS_MASK(h) \
(1UL << DUK_HEAPHDR_GET_FLAG_RANGE(&(h)->hdr, DUK_HOBJECT_FLAG_CLASS_BASE, DUK_HOBJECT_FLAG_CLASS_BITS))
/* Macro for creating flag initializer from a class number.
* Unsigned type cast is needed to avoid warnings about coercing
* a signed integer to an unsigned one; the largest class values
* have the highest bit (bit 31) set which causes this.
*/
#define DUK_HOBJECT_CLASS_AS_FLAGS(v) (((duk_uint_t) (v)) << DUK_HOBJECT_FLAG_CLASS_BASE)
/* E5 Section 8.6.2 + custom classes */
#define DUK_HOBJECT_CLASS_UNUSED 0
#define DUK_HOBJECT_CLASS_ARGUMENTS 1
#define DUK_HOBJECT_CLASS_ARRAY 2
#define DUK_HOBJECT_CLASS_BOOLEAN 3
#define DUK_HOBJECT_CLASS_DATE 4
#define DUK_HOBJECT_CLASS_ERROR 5
#define DUK_HOBJECT_CLASS_FUNCTION 6
#define DUK_HOBJECT_CLASS_JSON 7
#define DUK_HOBJECT_CLASS_MATH 8
#define DUK_HOBJECT_CLASS_NUMBER 9
#define DUK_HOBJECT_CLASS_OBJECT 10
#define DUK_HOBJECT_CLASS_REGEXP 11
#define DUK_HOBJECT_CLASS_STRING 12
#define DUK_HOBJECT_CLASS_GLOBAL 13
#define DUK_HOBJECT_CLASS_OBJENV 14 /* custom */
#define DUK_HOBJECT_CLASS_DECENV 15 /* custom */
#define DUK_HOBJECT_CLASS_BUFFER 16 /* custom; implies DUK_HOBJECT_IS_BUFFEROBJECT */
#define DUK_HOBJECT_CLASS_POINTER 17 /* custom */
#define DUK_HOBJECT_CLASS_THREAD 18 /* custom; implies DUK_HOBJECT_IS_THREAD */
#define DUK_HOBJECT_CLASS_ARRAYBUFFER 19 /* implies DUK_HOBJECT_IS_BUFFEROBJECT */
#define DUK_HOBJECT_CLASS_DATAVIEW 20
#define DUK_HOBJECT_CLASS_INT8ARRAY 21
#define DUK_HOBJECT_CLASS_UINT8ARRAY 22
#define DUK_HOBJECT_CLASS_UINT8CLAMPEDARRAY 23
#define DUK_HOBJECT_CLASS_INT16ARRAY 24
#define DUK_HOBJECT_CLASS_UINT16ARRAY 25
#define DUK_HOBJECT_CLASS_INT32ARRAY 26
#define DUK_HOBJECT_CLASS_UINT32ARRAY 27
#define DUK_HOBJECT_CLASS_FLOAT32ARRAY 28
#define DUK_HOBJECT_CLASS_FLOAT64ARRAY 29
#define DUK_HOBJECT_CLASS_MAX 29
/* class masks */
#define DUK_HOBJECT_CMASK_ALL ((1UL << (DUK_HOBJECT_CLASS_MAX + 1)) - 1UL)
#define DUK_HOBJECT_CMASK_UNUSED (1UL << DUK_HOBJECT_CLASS_UNUSED)
#define DUK_HOBJECT_CMASK_ARGUMENTS (1UL << DUK_HOBJECT_CLASS_ARGUMENTS)
#define DUK_HOBJECT_CMASK_ARRAY (1UL << DUK_HOBJECT_CLASS_ARRAY)
#define DUK_HOBJECT_CMASK_BOOLEAN (1UL << DUK_HOBJECT_CLASS_BOOLEAN)
#define DUK_HOBJECT_CMASK_DATE (1UL << DUK_HOBJECT_CLASS_DATE)
#define DUK_HOBJECT_CMASK_ERROR (1UL << DUK_HOBJECT_CLASS_ERROR)
#define DUK_HOBJECT_CMASK_FUNCTION (1UL << DUK_HOBJECT_CLASS_FUNCTION)
#define DUK_HOBJECT_CMASK_JSON (1UL << DUK_HOBJECT_CLASS_JSON)
#define DUK_HOBJECT_CMASK_MATH (1UL << DUK_HOBJECT_CLASS_MATH)
#define DUK_HOBJECT_CMASK_NUMBER (1UL << DUK_HOBJECT_CLASS_NUMBER)
#define DUK_HOBJECT_CMASK_OBJECT (1UL << DUK_HOBJECT_CLASS_OBJECT)
#define DUK_HOBJECT_CMASK_REGEXP (1UL << DUK_HOBJECT_CLASS_REGEXP)
#define DUK_HOBJECT_CMASK_STRING (1UL << DUK_HOBJECT_CLASS_STRING)
#define DUK_HOBJECT_CMASK_GLOBAL (1UL << DUK_HOBJECT_CLASS_GLOBAL)
#define DUK_HOBJECT_CMASK_OBJENV (1UL << DUK_HOBJECT_CLASS_OBJENV)
#define DUK_HOBJECT_CMASK_DECENV (1UL << DUK_HOBJECT_CLASS_DECENV)
#define DUK_HOBJECT_CMASK_BUFFER (1UL << DUK_HOBJECT_CLASS_BUFFER)
#define DUK_HOBJECT_CMASK_POINTER (1UL << DUK_HOBJECT_CLASS_POINTER)
#define DUK_HOBJECT_CMASK_THREAD (1UL << DUK_HOBJECT_CLASS_THREAD)
#define DUK_HOBJECT_CMASK_ARRAYBUFFER (1UL << DUK_HOBJECT_CLASS_ARRAYBUFFER)
#define DUK_HOBJECT_CMASK_DATAVIEW (1UL << DUK_HOBJECT_CLASS_DATAVIEW)
#define DUK_HOBJECT_CMASK_INT8ARRAY (1UL << DUK_HOBJECT_CLASS_INT8ARRAY)
#define DUK_HOBJECT_CMASK_UINT8ARRAY (1UL << DUK_HOBJECT_CLASS_UINT8ARRAY)
#define DUK_HOBJECT_CMASK_UINT8CLAMPEDARRAY (1UL << DUK_HOBJECT_CLASS_UINT8CLAMPEDARRAY)
#define DUK_HOBJECT_CMASK_INT16ARRAY (1UL << DUK_HOBJECT_CLASS_INT16ARRAY)
#define DUK_HOBJECT_CMASK_UINT16ARRAY (1UL << DUK_HOBJECT_CLASS_UINT16ARRAY)
#define DUK_HOBJECT_CMASK_INT32ARRAY (1UL << DUK_HOBJECT_CLASS_INT32ARRAY)
#define DUK_HOBJECT_CMASK_UINT32ARRAY (1UL << DUK_HOBJECT_CLASS_UINT32ARRAY)
#define DUK_HOBJECT_CMASK_FLOAT32ARRAY (1UL << DUK_HOBJECT_CLASS_FLOAT32ARRAY)
#define DUK_HOBJECT_CMASK_FLOAT64ARRAY (1UL << DUK_HOBJECT_CLASS_FLOAT64ARRAY)
#define DUK_HOBJECT_CMASK_ALL_BUFFEROBJECTS \
(DUK_HOBJECT_CMASK_BUFFER | \
DUK_HOBJECT_CMASK_ARRAYBUFFER | \
DUK_HOBJECT_CMASK_DATAVIEW | \
DUK_HOBJECT_CMASK_INT8ARRAY | \
DUK_HOBJECT_CMASK_UINT8ARRAY | \
DUK_HOBJECT_CMASK_UINT8CLAMPEDARRAY | \
DUK_HOBJECT_CMASK_INT16ARRAY | \
DUK_HOBJECT_CMASK_UINT16ARRAY | \
DUK_HOBJECT_CMASK_INT32ARRAY | \
DUK_HOBJECT_CMASK_UINT32ARRAY | \
DUK_HOBJECT_CMASK_FLOAT32ARRAY | \
DUK_HOBJECT_CMASK_FLOAT64ARRAY)
#define DUK_HOBJECT_IS_OBJENV(h) (DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_OBJENV)
#define DUK_HOBJECT_IS_DECENV(h) (DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_DECENV)
#define DUK_HOBJECT_IS_ENV(h) (DUK_HOBJECT_IS_OBJENV((h)) || DUK_HOBJECT_IS_DECENV((h)))
#define DUK_HOBJECT_IS_ARRAY(h) (DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_ARRAY)
#define DUK_HOBJECT_IS_COMPILEDFUNCTION(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_COMPILEDFUNCTION)
#define DUK_HOBJECT_IS_NATIVEFUNCTION(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NATIVEFUNCTION)
#define DUK_HOBJECT_IS_BUFFEROBJECT(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_BUFFEROBJECT)
#define DUK_HOBJECT_IS_THREAD(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_THREAD)
#define DUK_HOBJECT_IS_NONBOUND_FUNCTION(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, \
DUK_HOBJECT_FLAG_COMPILEDFUNCTION | \
DUK_HOBJECT_FLAG_NATIVEFUNCTION)
#define DUK_HOBJECT_IS_FUNCTION(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, \
DUK_HOBJECT_FLAG_BOUND | \
DUK_HOBJECT_FLAG_COMPILEDFUNCTION | \
DUK_HOBJECT_FLAG_NATIVEFUNCTION)
#define DUK_HOBJECT_IS_CALLABLE(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, \
DUK_HOBJECT_FLAG_BOUND | \
DUK_HOBJECT_FLAG_COMPILEDFUNCTION | \
DUK_HOBJECT_FLAG_NATIVEFUNCTION)
/* object has any exotic behavior(s) */
#define DUK_HOBJECT_EXOTIC_BEHAVIOR_FLAGS (DUK_HOBJECT_FLAG_EXOTIC_ARRAY | \
DUK_HOBJECT_FLAG_EXOTIC_ARGUMENTS | \
DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ | \
DUK_HOBJECT_FLAG_EXOTIC_DUKFUNC | \
DUK_HOBJECT_FLAG_BUFFEROBJECT | \
DUK_HOBJECT_FLAG_EXOTIC_PROXYOBJ)
#define DUK_HOBJECT_HAS_EXOTIC_BEHAVIOR(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_EXOTIC_BEHAVIOR_FLAGS)
#define DUK_HOBJECT_HAS_EXTENSIBLE(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXTENSIBLE)
#define DUK_HOBJECT_HAS_CONSTRUCTABLE(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_CONSTRUCTABLE)
#define DUK_HOBJECT_HAS_BOUND(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_BOUND)
#define DUK_HOBJECT_HAS_COMPILEDFUNCTION(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_COMPILEDFUNCTION)
#define DUK_HOBJECT_HAS_NATIVEFUNCTION(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NATIVEFUNCTION)
#define DUK_HOBJECT_HAS_BUFFEROBJECT(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_BUFFEROBJECT)
#define DUK_HOBJECT_HAS_THREAD(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_THREAD)
#define DUK_HOBJECT_HAS_ARRAY_PART(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_ARRAY_PART)
#define DUK_HOBJECT_HAS_STRICT(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_STRICT)
#define DUK_HOBJECT_HAS_NOTAIL(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NOTAIL)
#define DUK_HOBJECT_HAS_NEWENV(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NEWENV)
#define DUK_HOBJECT_HAS_NAMEBINDING(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NAMEBINDING)
#define DUK_HOBJECT_HAS_CREATEARGS(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_CREATEARGS)
#define DUK_HOBJECT_HAS_ENVRECCLOSED(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_ENVRECCLOSED)
#define DUK_HOBJECT_HAS_EXOTIC_ARRAY(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_ARRAY)
#define DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ)
#define DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_ARGUMENTS)
#define DUK_HOBJECT_HAS_EXOTIC_DUKFUNC(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_DUKFUNC)
#define DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(h) DUK_HEAPHDR_CHECK_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_PROXYOBJ)
#define DUK_HOBJECT_SET_EXTENSIBLE(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXTENSIBLE)
#define DUK_HOBJECT_SET_CONSTRUCTABLE(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_CONSTRUCTABLE)
#define DUK_HOBJECT_SET_BOUND(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_BOUND)
#define DUK_HOBJECT_SET_COMPILEDFUNCTION(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_COMPILEDFUNCTION)
#define DUK_HOBJECT_SET_NATIVEFUNCTION(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NATIVEFUNCTION)
#define DUK_HOBJECT_SET_BUFFEROBJECT(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_BUFFEROBJECT)
#define DUK_HOBJECT_SET_THREAD(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_THREAD)
#define DUK_HOBJECT_SET_ARRAY_PART(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_ARRAY_PART)
#define DUK_HOBJECT_SET_STRICT(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_STRICT)
#define DUK_HOBJECT_SET_NOTAIL(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NOTAIL)
#define DUK_HOBJECT_SET_NEWENV(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NEWENV)
#define DUK_HOBJECT_SET_NAMEBINDING(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NAMEBINDING)
#define DUK_HOBJECT_SET_CREATEARGS(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_CREATEARGS)
#define DUK_HOBJECT_SET_ENVRECCLOSED(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_ENVRECCLOSED)
#define DUK_HOBJECT_SET_EXOTIC_ARRAY(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_ARRAY)
#define DUK_HOBJECT_SET_EXOTIC_STRINGOBJ(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ)
#define DUK_HOBJECT_SET_EXOTIC_ARGUMENTS(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_ARGUMENTS)
#define DUK_HOBJECT_SET_EXOTIC_DUKFUNC(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_DUKFUNC)
#define DUK_HOBJECT_SET_EXOTIC_PROXYOBJ(h) DUK_HEAPHDR_SET_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_PROXYOBJ)
#define DUK_HOBJECT_CLEAR_EXTENSIBLE(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXTENSIBLE)
#define DUK_HOBJECT_CLEAR_CONSTRUCTABLE(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_CONSTRUCTABLE)
#define DUK_HOBJECT_CLEAR_BOUND(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_BOUND)
#define DUK_HOBJECT_CLEAR_COMPILEDFUNCTION(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_COMPILEDFUNCTION)
#define DUK_HOBJECT_CLEAR_NATIVEFUNCTION(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NATIVEFUNCTION)
#define DUK_HOBJECT_CLEAR_BUFFEROBJECT(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_BUFFEROBJECT)
#define DUK_HOBJECT_CLEAR_THREAD(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_THREAD)
#define DUK_HOBJECT_CLEAR_ARRAY_PART(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_ARRAY_PART)
#define DUK_HOBJECT_CLEAR_STRICT(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_STRICT)
#define DUK_HOBJECT_CLEAR_NOTAIL(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NOTAIL)
#define DUK_HOBJECT_CLEAR_NEWENV(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NEWENV)
#define DUK_HOBJECT_CLEAR_NAMEBINDING(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_NAMEBINDING)
#define DUK_HOBJECT_CLEAR_CREATEARGS(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_CREATEARGS)
#define DUK_HOBJECT_CLEAR_ENVRECCLOSED(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_ENVRECCLOSED)
#define DUK_HOBJECT_CLEAR_EXOTIC_ARRAY(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_ARRAY)
#define DUK_HOBJECT_CLEAR_EXOTIC_STRINGOBJ(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ)
#define DUK_HOBJECT_CLEAR_EXOTIC_ARGUMENTS(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_ARGUMENTS)
#define DUK_HOBJECT_CLEAR_EXOTIC_DUKFUNC(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_DUKFUNC)
#define DUK_HOBJECT_CLEAR_EXOTIC_PROXYOBJ(h) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(h)->hdr, DUK_HOBJECT_FLAG_EXOTIC_PROXYOBJ)
/* flags used for property attributes in duk_propdesc and packed flags */
#define DUK_PROPDESC_FLAG_WRITABLE (1 << 0) /* E5 Section 8.6.1 */
#define DUK_PROPDESC_FLAG_ENUMERABLE (1 << 1) /* E5 Section 8.6.1 */
#define DUK_PROPDESC_FLAG_CONFIGURABLE (1 << 2) /* E5 Section 8.6.1 */
#define DUK_PROPDESC_FLAG_ACCESSOR (1 << 3) /* accessor */
#define DUK_PROPDESC_FLAG_VIRTUAL (1 << 4) /* property is virtual: used in duk_propdesc, never stored
* (used by e.g. buffer virtual properties)
*/
#define DUK_PROPDESC_FLAGS_MASK (DUK_PROPDESC_FLAG_WRITABLE | \
DUK_PROPDESC_FLAG_ENUMERABLE | \
DUK_PROPDESC_FLAG_CONFIGURABLE | \
DUK_PROPDESC_FLAG_ACCESSOR)
/* additional flags which are passed in the same flags argument as property
* flags but are not stored in object properties.
*/
#define DUK_PROPDESC_FLAG_NO_OVERWRITE (1 << 4) /* internal define property: skip write silently if exists */
/* convenience */
#define DUK_PROPDESC_FLAGS_NONE 0
#define DUK_PROPDESC_FLAGS_W (DUK_PROPDESC_FLAG_WRITABLE)
#define DUK_PROPDESC_FLAGS_E (DUK_PROPDESC_FLAG_ENUMERABLE)
#define DUK_PROPDESC_FLAGS_C (DUK_PROPDESC_FLAG_CONFIGURABLE)
#define DUK_PROPDESC_FLAGS_WE (DUK_PROPDESC_FLAG_WRITABLE | DUK_PROPDESC_FLAG_ENUMERABLE)
#define DUK_PROPDESC_FLAGS_WC (DUK_PROPDESC_FLAG_WRITABLE | DUK_PROPDESC_FLAG_CONFIGURABLE)
#define DUK_PROPDESC_FLAGS_EC (DUK_PROPDESC_FLAG_ENUMERABLE | DUK_PROPDESC_FLAG_CONFIGURABLE)
#define DUK_PROPDESC_FLAGS_WEC (DUK_PROPDESC_FLAG_WRITABLE | \
DUK_PROPDESC_FLAG_ENUMERABLE | \
DUK_PROPDESC_FLAG_CONFIGURABLE)
/* flags for duk_hobject_get_own_propdesc() and variants */
#define DUK_GETDESC_FLAG_PUSH_VALUE (1 << 0) /* push value to stack */
#define DUK_GETDESC_FLAG_IGNORE_PROTOLOOP (1 << 1) /* don't throw for prototype loop */
/*
* Macro for object validity check
*
* Assert for currently guaranteed relations between flags, for instance.
*/
#define DUK_ASSERT_HOBJECT_VALID(h) do { \
DUK_ASSERT((h) != NULL); \
DUK_ASSERT(!DUK_HOBJECT_IS_CALLABLE((h)) || \
DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_FUNCTION); \
DUK_ASSERT(!DUK_HOBJECT_IS_BUFFEROBJECT((h)) || \
(DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_BUFFER || \
DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_ARRAYBUFFER || \
DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_DATAVIEW || \
DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_INT8ARRAY || \
DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_UINT8ARRAY || \
DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_UINT8CLAMPEDARRAY || \
DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_INT16ARRAY || \
DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_UINT16ARRAY || \
DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_INT32ARRAY || \
DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_UINT32ARRAY || \
DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_FLOAT32ARRAY || \
DUK_HOBJECT_GET_CLASS_NUMBER((h)) == DUK_HOBJECT_CLASS_FLOAT64ARRAY)); \
} while (0)
/*
* Macros to access the 'props' allocation.
*/
#if defined(DUK_USE_HEAPPTR16)
#define DUK_HOBJECT_GET_PROPS(heap,h) \
((duk_uint8_t *) DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, ((duk_heaphdr *) (h))->h_extra16))
#define DUK_HOBJECT_SET_PROPS(heap,h,x) do { \
((duk_heaphdr *) (h))->h_extra16 = DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (void *) (x)); \
} while (0)
#else
#define DUK_HOBJECT_GET_PROPS(heap,h) \
((h)->props)
#define DUK_HOBJECT_SET_PROPS(heap,h,x) do { \
(h)->props = (duk_uint8_t *) (x); \
} while (0)
#endif
#if defined(DUK_USE_HOBJECT_LAYOUT_1)
/* LAYOUT 1 */
#define DUK_HOBJECT_E_GET_KEY_BASE(heap,h) \
((duk_hstring **) (void *) ( \
DUK_HOBJECT_GET_PROPS((heap), (h)) \
))
#define DUK_HOBJECT_E_GET_VALUE_BASE(heap,h) \
((duk_propvalue *) (void *) ( \
DUK_HOBJECT_GET_PROPS((heap), (h)) + \
DUK_HOBJECT_GET_ESIZE((h)) * sizeof(duk_hstring *) \
))
#define DUK_HOBJECT_E_GET_FLAGS_BASE(heap,h) \
((duk_uint8_t *) (void *) ( \
DUK_HOBJECT_GET_PROPS((heap), (h)) + DUK_HOBJECT_GET_ESIZE((h)) * (sizeof(duk_hstring *) + sizeof(duk_propvalue)) \
))
#define DUK_HOBJECT_A_GET_BASE(heap,h) \
((duk_tval *) (void *) ( \
DUK_HOBJECT_GET_PROPS((heap), (h)) + \
DUK_HOBJECT_GET_ESIZE((h)) * (sizeof(duk_hstring *) + sizeof(duk_propvalue) + sizeof(duk_uint8_t)) \
))
#define DUK_HOBJECT_H_GET_BASE(heap,h) \
((duk_uint32_t *) (void *) ( \
DUK_HOBJECT_GET_PROPS((heap), (h)) + \
DUK_HOBJECT_GET_ESIZE((h)) * (sizeof(duk_hstring *) + sizeof(duk_propvalue) + sizeof(duk_uint8_t)) + \
DUK_HOBJECT_GET_ASIZE((h)) * sizeof(duk_tval) \
))
#define DUK_HOBJECT_P_COMPUTE_SIZE(n_ent,n_arr,n_hash) \
( \
(n_ent) * (sizeof(duk_hstring *) + sizeof(duk_propvalue) + sizeof(duk_uint8_t)) + \
(n_arr) * sizeof(duk_tval) + \
(n_hash) * sizeof(duk_uint32_t) \
)
#define DUK_HOBJECT_P_SET_REALLOC_PTRS(p_base,set_e_k,set_e_pv,set_e_f,set_a,set_h,n_ent,n_arr,n_hash) do { \
(set_e_k) = (duk_hstring **) (void *) (p_base); \
(set_e_pv) = (duk_propvalue *) (void *) ((set_e_k) + (n_ent)); \
(set_e_f) = (duk_uint8_t *) (void *) ((set_e_pv) + (n_ent)); \
(set_a) = (duk_tval *) (void *) ((set_e_f) + (n_ent)); \
(set_h) = (duk_uint32_t *) (void *) ((set_a) + (n_arr)); \
} while (0)
#elif defined(DUK_USE_HOBJECT_LAYOUT_2)
/* LAYOUT 2 */
#if (DUK_USE_ALIGN_BY == 4)
#define DUK_HOBJECT_E_FLAG_PADDING(e_sz) ((4 - (e_sz)) & 0x03)
#elif (DUK_USE_ALIGN_BY == 8)
#define DUK_HOBJECT_E_FLAG_PADDING(e_sz) ((8 - (e_sz)) & 0x07)
#elif (DUK_USE_ALIGN_BY == 1)
#define DUK_HOBJECT_E_FLAG_PADDING(e_sz) 0
#else
#error invalid DUK_USE_ALIGN_BY
#endif
#define DUK_HOBJECT_E_GET_KEY_BASE(heap,h) \
((duk_hstring **) (void *) ( \
DUK_HOBJECT_GET_PROPS((heap), (h)) + \
DUK_HOBJECT_GET_ESIZE((h)) * sizeof(duk_propvalue) \
))
#define DUK_HOBJECT_E_GET_VALUE_BASE(heap,h) \
((duk_propvalue *) (void *) ( \
DUK_HOBJECT_GET_PROPS((heap), (h)) \
))
#define DUK_HOBJECT_E_GET_FLAGS_BASE(heap,h) \
((duk_uint8_t *) (void *) ( \
DUK_HOBJECT_GET_PROPS((heap), (h)) + DUK_HOBJECT_GET_ESIZE((h)) * (sizeof(duk_hstring *) + sizeof(duk_propvalue)) \
))
#define DUK_HOBJECT_A_GET_BASE(heap,h) \
((duk_tval *) (void *) ( \
DUK_HOBJECT_GET_PROPS((heap), (h)) + \
DUK_HOBJECT_GET_ESIZE((h)) * (sizeof(duk_hstring *) + sizeof(duk_propvalue) + sizeof(duk_uint8_t)) + \
DUK_HOBJECT_E_FLAG_PADDING(DUK_HOBJECT_GET_ESIZE((h))) \
))
#define DUK_HOBJECT_H_GET_BASE(heap,h) \
((duk_uint32_t *) (void *) ( \
DUK_HOBJECT_GET_PROPS((heap), (h)) + \
DUK_HOBJECT_GET_ESIZE((h)) * (sizeof(duk_hstring *) + sizeof(duk_propvalue) + sizeof(duk_uint8_t)) + \
DUK_HOBJECT_E_FLAG_PADDING(DUK_HOBJECT_GET_ESIZE((h))) + \
DUK_HOBJECT_GET_ASIZE((h)) * sizeof(duk_tval) \
))
#define DUK_HOBJECT_P_COMPUTE_SIZE(n_ent,n_arr,n_hash) \
( \
(n_ent) * (sizeof(duk_hstring *) + sizeof(duk_propvalue) + sizeof(duk_uint8_t)) + \
DUK_HOBJECT_E_FLAG_PADDING((n_ent)) + \
(n_arr) * sizeof(duk_tval) + \
(n_hash) * sizeof(duk_uint32_t) \
)
#define DUK_HOBJECT_P_SET_REALLOC_PTRS(p_base,set_e_k,set_e_pv,set_e_f,set_a,set_h,n_ent,n_arr,n_hash) do { \
(set_e_pv) = (duk_propvalue *) (void *) (p_base); \
(set_e_k) = (duk_hstring **) (void *) ((set_e_pv) + (n_ent)); \
(set_e_f) = (duk_uint8_t *) (void *) ((set_e_k) + (n_ent)); \
(set_a) = (duk_tval *) (void *) (((duk_uint8_t *) (set_e_f)) + \
sizeof(duk_uint8_t) * (n_ent) + \
DUK_HOBJECT_E_FLAG_PADDING((n_ent))); \
(set_h) = (duk_uint32_t *) (void *) ((set_a) + (n_arr)); \
} while (0)
#elif defined(DUK_USE_HOBJECT_LAYOUT_3)
/* LAYOUT 3 */
#define DUK_HOBJECT_E_GET_KEY_BASE(heap,h) \
((duk_hstring **) (void *) ( \
DUK_HOBJECT_GET_PROPS((heap), (h)) + \
DUK_HOBJECT_GET_ESIZE((h)) * sizeof(duk_propvalue) + \
DUK_HOBJECT_GET_ASIZE((h)) * sizeof(duk_tval) \
))
#define DUK_HOBJECT_E_GET_VALUE_BASE(heap,h) \
((duk_propvalue *) (void *) ( \
DUK_HOBJECT_GET_PROPS((heap), (h)) \
))
#define DUK_HOBJECT_E_GET_FLAGS_BASE(heap,h) \
((duk_uint8_t *) (void *) ( \
DUK_HOBJECT_GET_PROPS((heap), (h)) + \
DUK_HOBJECT_GET_ESIZE((h)) * (sizeof(duk_propvalue) + sizeof(duk_hstring *)) + \
DUK_HOBJECT_GET_ASIZE((h)) * sizeof(duk_tval) + \
DUK_HOBJECT_GET_HSIZE((h)) * sizeof(duk_uint32_t) \
))
#define DUK_HOBJECT_A_GET_BASE(heap,h) \
((duk_tval *) (void *) ( \
DUK_HOBJECT_GET_PROPS((heap), (h)) + \
DUK_HOBJECT_GET_ESIZE((h)) * sizeof(duk_propvalue) \
))
#define DUK_HOBJECT_H_GET_BASE(heap,h) \
((duk_uint32_t *) (void *) ( \
DUK_HOBJECT_GET_PROPS((heap), (h)) + \
DUK_HOBJECT_GET_ESIZE((h)) * (sizeof(duk_propvalue) + sizeof(duk_hstring *)) + \
DUK_HOBJECT_GET_ASIZE((h)) * sizeof(duk_tval) \
))
#define DUK_HOBJECT_P_COMPUTE_SIZE(n_ent,n_arr,n_hash) \
( \
(n_ent) * (sizeof(duk_propvalue) + sizeof(duk_hstring *) + sizeof(duk_uint8_t)) + \
(n_arr) * sizeof(duk_tval) + \
(n_hash) * sizeof(duk_uint32_t) \
)
#define DUK_HOBJECT_P_SET_REALLOC_PTRS(p_base,set_e_k,set_e_pv,set_e_f,set_a,set_h,n_ent,n_arr,n_hash) do { \
(set_e_pv) = (duk_propvalue *) (void *) (p_base); \
(set_a) = (duk_tval *) (void *) ((set_e_pv) + (n_ent)); \
(set_e_k) = (duk_hstring **) (void *) ((set_a) + (n_arr)); \
(set_h) = (duk_uint32_t *) (void *) ((set_e_k) + (n_ent)); \
(set_e_f) = (duk_uint8_t *) (void *) ((set_h) + (n_hash)); \
} while (0)
#else
#error invalid hobject layout defines
#endif /* hobject property layout */
#define DUK_HOBJECT_P_ALLOC_SIZE(h) \
DUK_HOBJECT_P_COMPUTE_SIZE(DUK_HOBJECT_GET_ESIZE((h)), DUK_HOBJECT_GET_ASIZE((h)), DUK_HOBJECT_GET_HSIZE((h)))
#define DUK_HOBJECT_E_GET_KEY(heap,h,i) (DUK_HOBJECT_E_GET_KEY_BASE((heap), (h))[(i)])
#define DUK_HOBJECT_E_GET_KEY_PTR(heap,h,i) (&DUK_HOBJECT_E_GET_KEY_BASE((heap), (h))[(i)])
#define DUK_HOBJECT_E_GET_VALUE(heap,h,i) (DUK_HOBJECT_E_GET_VALUE_BASE((heap), (h))[(i)])
#define DUK_HOBJECT_E_GET_VALUE_PTR(heap,h,i) (&DUK_HOBJECT_E_GET_VALUE_BASE((heap), (h))[(i)])
#define DUK_HOBJECT_E_GET_VALUE_TVAL(heap,h,i) (DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)).v)
#define DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(heap,h,i) (&DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)).v)
#define DUK_HOBJECT_E_GET_VALUE_GETTER(heap,h,i) (DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)).a.get)
#define DUK_HOBJECT_E_GET_VALUE_GETTER_PTR(heap,h,i) (&DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)).a.get)
#define DUK_HOBJECT_E_GET_VALUE_SETTER(heap,h,i) (DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)).a.set)
#define DUK_HOBJECT_E_GET_VALUE_SETTER_PTR(heap,h,i) (&DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)).a.set)
#define DUK_HOBJECT_E_GET_FLAGS(heap,h,i) (DUK_HOBJECT_E_GET_FLAGS_BASE((heap), (h))[(i)])
#define DUK_HOBJECT_E_GET_FLAGS_PTR(heap,h,i) (&DUK_HOBJECT_E_GET_FLAGS_BASE((heap), (h))[(i)])
#define DUK_HOBJECT_A_GET_VALUE(heap,h,i) (DUK_HOBJECT_A_GET_BASE((heap), (h))[(i)])
#define DUK_HOBJECT_A_GET_VALUE_PTR(heap,h,i) (&DUK_HOBJECT_A_GET_BASE((heap), (h))[(i)])
#define DUK_HOBJECT_H_GET_INDEX(heap,h,i) (DUK_HOBJECT_H_GET_BASE((heap), (h))[(i)])
#define DUK_HOBJECT_H_GET_INDEX_PTR(heap,h,i) (&DUK_HOBJECT_H_GET_BASE((heap), (h))[(i)])
#define DUK_HOBJECT_E_SET_KEY(heap,h,i,k) do { \
DUK_HOBJECT_E_GET_KEY((heap), (h), (i)) = (k); \
} while (0)
#define DUK_HOBJECT_E_SET_VALUE(heap,h,i,v) do { \
DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)) = (v); \
} while (0)
#define DUK_HOBJECT_E_SET_VALUE_TVAL(heap,h,i,v) do { \
DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)).v = (v); \
} while (0)
#define DUK_HOBJECT_E_SET_VALUE_GETTER(heap,h,i,v) do { \
DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)).a.get = (v); \
} while (0)
#define DUK_HOBJECT_E_SET_VALUE_SETTER(heap,h,i,v) do { \
DUK_HOBJECT_E_GET_VALUE((heap), (h), (i)).a.set = (v); \
} while (0)
#define DUK_HOBJECT_E_SET_FLAGS(heap,h,i,f) do { \
DUK_HOBJECT_E_GET_FLAGS((heap), (h), (i)) = (duk_uint8_t) (f); \
} while (0)
#define DUK_HOBJECT_A_SET_VALUE(heap,h,i,v) do { \
DUK_HOBJECT_A_GET_VALUE((heap), (h), (i)) = (v); \
} while (0)
#define DUK_HOBJECT_A_SET_VALUE_TVAL(heap,h,i,v) \
DUK_HOBJECT_A_SET_VALUE((heap), (h), (i), (v)) /* alias for above */
#define DUK_HOBJECT_H_SET_INDEX(heap,h,i,v) do { \
DUK_HOBJECT_H_GET_INDEX((heap), (h), (i)) = (v); \
} while (0)
#define DUK_HOBJECT_E_SET_FLAG_BITS(heap,h,i,mask) do { \
DUK_HOBJECT_E_GET_FLAGS_BASE((heap), (h))[(i)] |= (mask); \
} while (0)
#define DUK_HOBJECT_E_CLEAR_FLAG_BITS(heap,h,i,mask) do { \
DUK_HOBJECT_E_GET_FLAGS_BASE((heap), (h))[(i)] &= ~(mask); \
} while (0)
#define DUK_HOBJECT_E_SLOT_IS_WRITABLE(heap,h,i) ((DUK_HOBJECT_E_GET_FLAGS((heap), (h), (i)) & DUK_PROPDESC_FLAG_WRITABLE) != 0)
#define DUK_HOBJECT_E_SLOT_IS_ENUMERABLE(heap,h,i) ((DUK_HOBJECT_E_GET_FLAGS((heap), (h), (i)) & DUK_PROPDESC_FLAG_ENUMERABLE) != 0)
#define DUK_HOBJECT_E_SLOT_IS_CONFIGURABLE(heap,h,i) ((DUK_HOBJECT_E_GET_FLAGS((heap), (h), (i)) & DUK_PROPDESC_FLAG_CONFIGURABLE) != 0)
#define DUK_HOBJECT_E_SLOT_IS_ACCESSOR(heap,h,i) ((DUK_HOBJECT_E_GET_FLAGS((heap), (h), (i)) & DUK_PROPDESC_FLAG_ACCESSOR) != 0)
#define DUK_HOBJECT_E_SLOT_SET_WRITABLE(heap,h,i) DUK_HOBJECT_E_SET_FLAG_BITS((heap), (h), (i),DUK_PROPDESC_FLAG_WRITABLE)
#define DUK_HOBJECT_E_SLOT_SET_ENUMERABLE(heap,h,i) DUK_HOBJECT_E_SET_FLAG_BITS((heap), (h), (i),DUK_PROPDESC_FLAG_ENUMERABLE)
#define DUK_HOBJECT_E_SLOT_SET_CONFIGURABLE(heap,h,i) DUK_HOBJECT_E_SET_FLAG_BITS((heap), (h), (i),DUK_PROPDESC_FLAG_CONFIGURABLE)
#define DUK_HOBJECT_E_SLOT_SET_ACCESSOR(heap,h,i) DUK_HOBJECT_E_SET_FLAG_BITS((heap), (h), (i),DUK_PROPDESC_FLAG_ACCESSOR)
#define DUK_HOBJECT_E_SLOT_CLEAR_WRITABLE(heap,h,i) DUK_HOBJECT_E_CLEAR_FLAG_BITS((heap), (h), (i),DUK_PROPDESC_FLAG_WRITABLE)
#define DUK_HOBJECT_E_SLOT_CLEAR_ENUMERABLE(heap,h,i) DUK_HOBJECT_E_CLEAR_FLAG_BITS((heap), (h), (i),DUK_PROPDESC_FLAG_ENUMERABLE)
#define DUK_HOBJECT_E_SLOT_CLEAR_CONFIGURABLE(heap,h,i) DUK_HOBJECT_E_CLEAR_FLAG_BITS((heap), (h), (i),DUK_PROPDESC_FLAG_CONFIGURABLE)
#define DUK_HOBJECT_E_SLOT_CLEAR_ACCESSOR(heap,h,i) DUK_HOBJECT_E_CLEAR_FLAG_BITS((heap), (h), (i),DUK_PROPDESC_FLAG_ACCESSOR)
#define DUK_PROPDESC_IS_WRITABLE(p) (((p)->flags & DUK_PROPDESC_FLAG_WRITABLE) != 0)
#define DUK_PROPDESC_IS_ENUMERABLE(p) (((p)->flags & DUK_PROPDESC_FLAG_ENUMERABLE) != 0)
#define DUK_PROPDESC_IS_CONFIGURABLE(p) (((p)->flags & DUK_PROPDESC_FLAG_CONFIGURABLE) != 0)
#define DUK_PROPDESC_IS_ACCESSOR(p) (((p)->flags & DUK_PROPDESC_FLAG_ACCESSOR) != 0)
#define DUK_HOBJECT_HASHIDX_UNUSED 0xffffffffUL
#define DUK_HOBJECT_HASHIDX_DELETED 0xfffffffeUL
/*
* Macros for accessing size fields
*/
#if defined(DUK_USE_OBJSIZES16)
#define DUK_HOBJECT_GET_ESIZE(h) ((h)->e_size16)
#define DUK_HOBJECT_SET_ESIZE(h,v) do { (h)->e_size16 = (v); } while (0)
#define DUK_HOBJECT_GET_ENEXT(h) ((h)->e_next16)
#define DUK_HOBJECT_SET_ENEXT(h,v) do { (h)->e_next16 = (v); } while (0)
#define DUK_HOBJECT_POSTINC_ENEXT(h) ((h)->e_next16++)
#define DUK_HOBJECT_GET_ASIZE(h) ((h)->a_size16)
#define DUK_HOBJECT_SET_ASIZE(h,v) do { (h)->a_size16 = (v); } while (0)
#if defined(DUK_USE_HOBJECT_HASH_PART)
#define DUK_HOBJECT_GET_HSIZE(h) ((h)->h_size16)
#define DUK_HOBJECT_SET_HSIZE(h,v) do { (h)->h_size16 = (v); } while (0)
#else
#define DUK_HOBJECT_GET_HSIZE(h) 0
#define DUK_HOBJECT_SET_HSIZE(h,v) do { DUK_ASSERT((v) == 0); } while (0)
#endif
#else
#define DUK_HOBJECT_GET_ESIZE(h) ((h)->e_size)
#define DUK_HOBJECT_SET_ESIZE(h,v) do { (h)->e_size = (v); } while (0)
#define DUK_HOBJECT_GET_ENEXT(h) ((h)->e_next)
#define DUK_HOBJECT_SET_ENEXT(h,v) do { (h)->e_next = (v); } while (0)
#define DUK_HOBJECT_POSTINC_ENEXT(h) ((h)->e_next++)
#define DUK_HOBJECT_GET_ASIZE(h) ((h)->a_size)
#define DUK_HOBJECT_SET_ASIZE(h,v) do { (h)->a_size = (v); } while (0)
#if defined(DUK_USE_HOBJECT_HASH_PART)
#define DUK_HOBJECT_GET_HSIZE(h) ((h)->h_size)
#define DUK_HOBJECT_SET_HSIZE(h,v) do { (h)->h_size = (v); } while (0)
#else
#define DUK_HOBJECT_GET_HSIZE(h) 0
#define DUK_HOBJECT_SET_HSIZE(h,v) do { DUK_ASSERT((v) == 0); } while (0)
#endif
#endif
/*
* Misc
*/
/* Maximum prototype traversal depth. Sanity limit which handles e.g.
* prototype loops (even complex ones like 1->2->3->4->2->3->4->2->3->4).
*/
#define DUK_HOBJECT_PROTOTYPE_CHAIN_SANITY 10000L
/* Maximum traversal depth for "bound function" chains. */
#define DUK_HOBJECT_BOUND_CHAIN_SANITY 10000L
/*
* Ecmascript [[Class]]
*/
/* range check not necessary because all 4-bit values are mapped */
#define DUK_HOBJECT_CLASS_NUMBER_TO_STRIDX(n) duk_class_number_to_stridx[(n)]
#define DUK_HOBJECT_GET_CLASS_STRING(heap,h) \
DUK_HEAP_GET_STRING( \
(heap), \
DUK_HOBJECT_CLASS_NUMBER_TO_STRIDX(DUK_HOBJECT_GET_CLASS_NUMBER((h))) \
)
/*
* Macros for property handling
*/
#if defined(DUK_USE_HEAPPTR16)
#define DUK_HOBJECT_GET_PROTOTYPE(heap,h) \
((duk_hobject *) DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, (h)->prototype16))
#define DUK_HOBJECT_SET_PROTOTYPE(heap,h,x) do { \
(h)->prototype16 = DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (void *) (x)); \
} while (0)
#else
#define DUK_HOBJECT_GET_PROTOTYPE(heap,h) \
((h)->prototype)
#define DUK_HOBJECT_SET_PROTOTYPE(heap,h,x) do { \
(h)->prototype = (x); \
} while (0)
#endif
/* note: this updates refcounts */
#define DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr,h,p) duk_hobject_set_prototype_updref((thr), (h), (p))
/*
* Resizing and hash behavior
*/
/* Sanity limit on max number of properties (allocated, not necessarily used).
* This is somewhat arbitrary, but if we're close to 2**32 properties some
* algorithms will fail (e.g. hash size selection, next prime selection).
* Also, we use negative array/entry table indices to indicate 'not found',
* so anything above 0x80000000 will cause trouble now.
*/
#if defined(DUK_USE_OBJSIZES16)
#define DUK_HOBJECT_MAX_PROPERTIES 0x0000ffffUL
#else
#define DUK_HOBJECT_MAX_PROPERTIES 0x7fffffffUL /* 2**31-1 ~= 2G properties */
#endif
/* higher value conserves memory; also note that linear scan is cache friendly */
#define DUK_HOBJECT_E_USE_HASH_LIMIT 32
/* hash size relative to entries size: for value X, approx. hash_prime(e_size + e_size / X) */
#define DUK_HOBJECT_H_SIZE_DIVISOR 4 /* hash size approx. 1.25 times entries size */
/* if new_size < L * old_size, resize without abandon check; L = 3-bit fixed point, e.g. 9 -> 9/8 = 112.5% */
#define DUK_HOBJECT_A_FAST_RESIZE_LIMIT 9 /* 112.5%, i.e. new size less than 12.5% higher -> fast resize */
/* if density < L, abandon array part, L = 3-bit fixed point, e.g. 2 -> 2/8 = 25% */
/* limit is quite low: one array entry is 8 bytes, one normal entry is 4+1+8+4 = 17 bytes (with hash entry) */
#define DUK_HOBJECT_A_ABANDON_LIMIT 2 /* 25%, i.e. less than 25% used -> abandon */
/* internal align target for props allocation, must be 2*n for some n */
#if (DUK_USE_ALIGN_BY == 4)
#define DUK_HOBJECT_ALIGN_TARGET 4
#elif (DUK_USE_ALIGN_BY == 8)
#define DUK_HOBJECT_ALIGN_TARGET 8
#elif (DUK_USE_ALIGN_BY == 1)
#define DUK_HOBJECT_ALIGN_TARGET 1
#else
#error invalid DUK_USE_ALIGN_BY
#endif
/* controls for minimum entry part growth */
#define DUK_HOBJECT_E_MIN_GROW_ADD 16
#define DUK_HOBJECT_E_MIN_GROW_DIVISOR 8 /* 2^3 -> 1/8 = 12.5% min growth */
/* controls for minimum array part growth */
#define DUK_HOBJECT_A_MIN_GROW_ADD 16
#define DUK_HOBJECT_A_MIN_GROW_DIVISOR 8 /* 2^3 -> 1/8 = 12.5% min growth */
/* probe sequence */
#define DUK_HOBJECT_HASH_INITIAL(hash,h_size) ((hash) % (h_size))
#define DUK_HOBJECT_HASH_PROBE_STEP(hash) DUK_UTIL_GET_HASH_PROBE_STEP((hash))
/*
* PC-to-line constants
*/
#define DUK_PC2LINE_SKIP 64
/* maximum length for a SKIP-1 diffstream: 35 bits per entry, rounded up to bytes */
#define DUK_PC2LINE_MAX_DIFF_LENGTH (((DUK_PC2LINE_SKIP - 1) * 35 + 7) / 8)
/*
* Struct defs
*/
struct duk_propaccessor {
duk_hobject *get;
duk_hobject *set;
};
union duk_propvalue {
/* The get/set pointers could be 16-bit pointer compressed but it
* would make no difference on 32-bit platforms because duk_tval is
* 8 bytes or more anyway.
*/
duk_tval v;
duk_propaccessor a;
};
struct duk_propdesc {
/* read-only values 'lifted' for ease of use */
duk_small_int_t flags;
duk_hobject *get;
duk_hobject *set;
/* for updating (all are set to < 0 for virtual properties) */
duk_int_t e_idx; /* prop index in 'entry part', < 0 if not there */
duk_int_t h_idx; /* prop index in 'hash part', < 0 if not there */
duk_int_t a_idx; /* prop index in 'array part', < 0 if not there */
};
struct duk_hobject {
duk_heaphdr hdr;
/*
* 'props' contains {key,value,flags} entries, optional array entries, and
* an optional hash lookup table for non-array entries in a single 'sliced'
* allocation. There are several layout options, which differ slightly in
* generated code size/speed and alignment/padding; duk_features.h selects
* the layout used.
*
* Layout 1 (DUK_USE_HOBJECT_LAYOUT_1):
*
* e_size * sizeof(duk_hstring *) bytes of entry keys (e_next gc reachable)
* e_size * sizeof(duk_propvalue) bytes of entry values (e_next gc reachable)
* e_size * sizeof(duk_uint8_t) bytes of entry flags (e_next gc reachable)
* a_size * sizeof(duk_tval) bytes of (opt) array values (plain only) (all gc reachable)
* h_size * sizeof(duk_uint32_t) bytes of (opt) hash indexes to entries (e_size),
* 0xffffffffUL = unused, 0xfffffffeUL = deleted
*
* Layout 2 (DUK_USE_HOBJECT_LAYOUT_2):
*
* e_size * sizeof(duk_propvalue) bytes of entry values (e_next gc reachable)
* e_size * sizeof(duk_hstring *) bytes of entry keys (e_next gc reachable)
* e_size * sizeof(duk_uint8_t) + pad bytes of entry flags (e_next gc reachable)
* a_size * sizeof(duk_tval) bytes of (opt) array values (plain only) (all gc reachable)
* h_size * sizeof(duk_uint32_t) bytes of (opt) hash indexes to entries (e_size),
* 0xffffffffUL = unused, 0xfffffffeUL = deleted
*
* Layout 3 (DUK_USE_HOBJECT_LAYOUT_3):
*
* e_size * sizeof(duk_propvalue) bytes of entry values (e_next gc reachable)
* a_size * sizeof(duk_tval) bytes of (opt) array values (plain only) (all gc reachable)
* e_size * sizeof(duk_hstring *) bytes of entry keys (e_next gc reachable)
* h_size * sizeof(duk_uint32_t) bytes of (opt) hash indexes to entries (e_size),
* 0xffffffffUL = unused, 0xfffffffeUL = deleted
* e_size * sizeof(duk_uint8_t) bytes of entry flags (e_next gc reachable)
*
* In layout 1, the 'e_next' count is rounded to 4 or 8 on platforms
* requiring 4 or 8 byte alignment. This ensures proper alignment
* for the entries, at the cost of memory footprint. However, it's
* probably preferable to use another layout on such platforms instead.
*
* In layout 2, the key and value parts are swapped to avoid padding
* the key array on platforms requiring alignment by 8. The flags part
* is padded to get alignment for array entries. The 'e_next' count does
* not need to be rounded as in layout 1.
*
* In layout 3, entry values and array values are always aligned properly,
* and assuming pointers are at most 8 bytes, so are the entry keys. Hash
* indices will be properly aligned (assuming pointers are at least 4 bytes).
* Finally, flags don't need additional alignment. This layout provides
* compact allocations without padding (even on platforms with alignment
* requirements) at the cost of a bit slower lookups.
*
* Objects with few keys don't have a hash index; keys are looked up linearly,
* which is cache efficient because the keys are consecutive. Larger objects
* have a hash index part which contains integer indexes to the entries part.
*
* A single allocation reduces memory allocation overhead but requires more
* work when any part needs to be resized. A sliced allocation for entries
* makes linear key matching faster on most platforms (more locality) and
* skimps on flags size (which would be followed by 3 bytes of padding in
* most architectures if entries were placed in a struct).
*
* 'props' also contains internal properties distinguished with a non-BMP
* prefix. Often used properties should be placed early in 'props' whenever
* possible to make accessing them as fast a possible.
*/
#if defined(DUK_USE_HEAPPTR16)
/* Located in duk_heaphdr h_extra16. Subclasses of duk_hobject (like
* duk_hcompiledfunction) are not free to use h_extra16 for this reason.
*/
#else
duk_uint8_t *props;
#endif
/* prototype: the only internal property lifted outside 'e' as it is so central */
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t prototype16;
#else
duk_hobject *prototype;
#endif
#if defined(DUK_USE_OBJSIZES16)
duk_uint16_t e_size16;
duk_uint16_t e_next16;
duk_uint16_t a_size16;
#if defined(DUK_USE_HOBJECT_HASH_PART)
duk_uint16_t h_size16;
#endif
#else
duk_uint32_t e_size; /* entry part size */
duk_uint32_t e_next; /* index for next new key ([0,e_next[ are gc reachable) */
duk_uint32_t a_size; /* array part size (entirely gc reachable) */
#if defined(DUK_USE_HOBJECT_HASH_PART)
duk_uint32_t h_size; /* hash part size or 0 if unused */
#endif
#endif
};
/*
* Exposed data
*/
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL duk_uint8_t duk_class_number_to_stridx[32];
#endif /* !DUK_SINGLE_FILE */
/*
* Prototypes
*/
/* alloc and init */
DUK_INTERNAL_DECL duk_hobject *duk_hobject_alloc(duk_heap *heap, duk_uint_t hobject_flags);
#if 0 /* unused */
DUK_INTERNAL_DECL duk_hobject *duk_hobject_alloc_checked(duk_hthread *thr, duk_uint_t hobject_flags);
#endif
DUK_INTERNAL_DECL duk_hcompiledfunction *duk_hcompiledfunction_alloc(duk_heap *heap, duk_uint_t hobject_flags);
DUK_INTERNAL_DECL duk_hnativefunction *duk_hnativefunction_alloc(duk_heap *heap, duk_uint_t hobject_flags);
DUK_INTERNAL duk_hbufferobject *duk_hbufferobject_alloc(duk_heap *heap, duk_uint_t hobject_flags);
DUK_INTERNAL_DECL duk_hthread *duk_hthread_alloc(duk_heap *heap, duk_uint_t hobject_flags);
/* low-level property functions */
DUK_INTERNAL_DECL void duk_hobject_find_existing_entry(duk_heap *heap, duk_hobject *obj, duk_hstring *key, duk_int_t *e_idx, duk_int_t *h_idx);
DUK_INTERNAL_DECL duk_tval *duk_hobject_find_existing_entry_tval_ptr(duk_heap *heap, duk_hobject *obj, duk_hstring *key);
DUK_INTERNAL_DECL duk_tval *duk_hobject_find_existing_entry_tval_ptr_and_attrs(duk_heap *heap, duk_hobject *obj, duk_hstring *key, duk_int_t *out_attrs);
DUK_INTERNAL_DECL duk_tval *duk_hobject_find_existing_array_entry_tval_ptr(duk_heap *heap, duk_hobject *obj, duk_uarridx_t i);
DUK_INTERNAL_DECL duk_bool_t duk_hobject_get_own_propdesc(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *out_desc, duk_small_uint_t flags);
/* XXX: when optimizing for guaranteed property slots, use a guaranteed
* slot for internal value; this call can then access it directly.
*/
#define duk_hobject_get_internal_value_tval_ptr(heap,obj) \
duk_hobject_find_existing_entry_tval_ptr((heap), (obj), DUK_HEAP_STRING_INT_VALUE((heap)))
/* core property functions */
DUK_INTERNAL_DECL duk_bool_t duk_hobject_getprop(duk_hthread *thr, duk_tval *tv_obj, duk_tval *tv_key);
DUK_INTERNAL_DECL duk_bool_t duk_hobject_putprop(duk_hthread *thr, duk_tval *tv_obj, duk_tval *tv_key, duk_tval *tv_val, duk_bool_t throw_flag);
DUK_INTERNAL_DECL duk_bool_t duk_hobject_delprop(duk_hthread *thr, duk_tval *tv_obj, duk_tval *tv_key, duk_bool_t throw_flag);
DUK_INTERNAL_DECL duk_bool_t duk_hobject_hasprop(duk_hthread *thr, duk_tval *tv_obj, duk_tval *tv_key);
/* internal property functions */
#define DUK_DELPROP_FLAG_THROW (1 << 0)
#define DUK_DELPROP_FLAG_FORCE (1 << 1)
DUK_INTERNAL_DECL duk_bool_t duk_hobject_delprop_raw(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_small_uint_t flags);
DUK_INTERNAL_DECL duk_bool_t duk_hobject_hasprop_raw(duk_hthread *thr, duk_hobject *obj, duk_hstring *key);
DUK_INTERNAL_DECL void duk_hobject_define_property_internal(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_small_uint_t flags);
DUK_INTERNAL_DECL void duk_hobject_define_property_internal_arridx(duk_hthread *thr, duk_hobject *obj, duk_uarridx_t arr_idx, duk_small_uint_t flags);
DUK_INTERNAL_DECL void duk_hobject_define_accessor_internal(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_hobject *getter, duk_hobject *setter, duk_small_uint_t propflags);
DUK_INTERNAL_DECL void duk_hobject_set_length(duk_hthread *thr, duk_hobject *obj, duk_uint32_t length); /* XXX: duk_uarridx_t? */
DUK_INTERNAL_DECL void duk_hobject_set_length_zero(duk_hthread *thr, duk_hobject *obj);
DUK_INTERNAL_DECL duk_uint32_t duk_hobject_get_length(duk_hthread *thr, duk_hobject *obj); /* XXX: duk_uarridx_t? */
/* helpers for defineProperty() and defineProperties() */
DUK_INTERNAL_DECL
void duk_hobject_prepare_property_descriptor(duk_context *ctx,
duk_idx_t idx_in,
duk_uint_t *out_defprop_flags,
duk_idx_t *out_idx_value,
duk_hobject **out_getter,
duk_hobject **out_setter);
DUK_INTERNAL_DECL
void duk_hobject_define_property_helper(duk_context *ctx,
duk_uint_t defprop_flags,
duk_hobject *obj,
duk_hstring *key,
duk_idx_t idx_value,
duk_hobject *get,
duk_hobject *set);
/* Object built-in methods */
DUK_INTERNAL_DECL duk_ret_t duk_hobject_object_get_own_property_descriptor(duk_context *ctx);
DUK_INTERNAL_DECL void duk_hobject_object_seal_freeze_helper(duk_hthread *thr, duk_hobject *obj, duk_bool_t is_freeze);
DUK_INTERNAL_DECL duk_bool_t duk_hobject_object_is_sealed_frozen_helper(duk_hthread *thr, duk_hobject *obj, duk_bool_t is_frozen);
DUK_INTERNAL_DECL duk_bool_t duk_hobject_object_ownprop_helper(duk_context *ctx, duk_small_uint_t required_desc_flags);
/* internal properties */
DUK_INTERNAL_DECL duk_bool_t duk_hobject_get_internal_value(duk_heap *heap, duk_hobject *obj, duk_tval *tv);
DUK_INTERNAL_DECL duk_hstring *duk_hobject_get_internal_value_string(duk_heap *heap, duk_hobject *obj);
/* hobject management functions */
DUK_INTERNAL_DECL void duk_hobject_compact_props(duk_hthread *thr, duk_hobject *obj);
/* ES6 proxy */
#if defined(DUK_USE_ES6_PROXY)
DUK_INTERNAL_DECL duk_bool_t duk_hobject_proxy_check(duk_hthread *thr, duk_hobject *obj, duk_hobject **out_target, duk_hobject **out_handler);
DUK_INTERNAL_DECL duk_hobject *duk_hobject_resolve_proxy_target(duk_hthread *thr, duk_hobject *obj);
#endif
/* enumeration */
DUK_INTERNAL_DECL void duk_hobject_enumerator_create(duk_context *ctx, duk_small_uint_t enum_flags);
DUK_INTERNAL_DECL duk_ret_t duk_hobject_get_enumerated_keys(duk_context *ctx, duk_small_uint_t enum_flags);
DUK_INTERNAL_DECL duk_bool_t duk_hobject_enumerator_next(duk_context *ctx, duk_bool_t get_value);
/* macros */
DUK_INTERNAL_DECL void duk_hobject_set_prototype_updref(duk_hthread *thr, duk_hobject *h, duk_hobject *p);
/* finalization */
DUK_INTERNAL_DECL void duk_hobject_run_finalizer(duk_hthread *thr, duk_hobject *obj);
/* pc2line */
#if defined(DUK_USE_PC2LINE)
DUK_INTERNAL_DECL void duk_hobject_pc2line_pack(duk_hthread *thr, duk_compiler_instr *instrs, duk_uint_fast32_t length);
DUK_INTERNAL_DECL duk_uint_fast32_t duk_hobject_pc2line_query(duk_context *ctx, duk_idx_t idx_func, duk_uint_fast32_t pc);
#endif
/* misc */
DUK_INTERNAL_DECL duk_bool_t duk_hobject_prototype_chain_contains(duk_hthread *thr, duk_hobject *h, duk_hobject *p, duk_bool_t ignore_loop);
#endif /* DUK_HOBJECT_H_INCLUDED */
#line 1 "duk_hcompiledfunction.h"
/*
* Heap compiled function (Ecmascript function) representation.
*
* There is a single data buffer containing the Ecmascript function's
* bytecode, constants, and inner functions.
*/
#ifndef DUK_HCOMPILEDFUNCTION_H_INCLUDED
#define DUK_HCOMPILEDFUNCTION_H_INCLUDED
/*
* Field accessor macros
*/
/* XXX: casts could be improved, especially for GET/SET DATA */
#if defined(DUK_USE_HEAPPTR16)
#define DUK_HCOMPILEDFUNCTION_GET_DATA(heap,h) \
((duk_hbuffer_fixed *) (void *) DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, (h)->data16))
#define DUK_HCOMPILEDFUNCTION_SET_DATA(heap,h,v) do { \
(h)->data16 = DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (void *) (v)); \
} while (0)
#define DUK_HCOMPILEDFUNCTION_GET_FUNCS(heap,h) \
((duk_hobject **) (void *) (DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, (h)->funcs16)))
#define DUK_HCOMPILEDFUNCTION_SET_FUNCS(heap,h,v) do { \
(h)->funcs16 = DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (void *) (v)); \
} while (0)
#define DUK_HCOMPILEDFUNCTION_GET_BYTECODE(heap,h) \
((duk_instr_t *) (void *) (DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, (h)->bytecode16)))
#define DUK_HCOMPILEDFUNCTION_SET_BYTECODE(heap,h,v) do { \
(h)->bytecode16 = DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (void *) (v)); \
} while (0)
#else
#define DUK_HCOMPILEDFUNCTION_GET_DATA(heap,h) \
((duk_hbuffer_fixed *) (void *) (h)->data)
#define DUK_HCOMPILEDFUNCTION_SET_DATA(heap,h,v) do { \
(h)->data = (duk_hbuffer *) (v); \
} while (0)
#define DUK_HCOMPILEDFUNCTION_GET_FUNCS(heap,h) \
((h)->funcs)
#define DUK_HCOMPILEDFUNCTION_SET_FUNCS(heap,h,v) do { \
(h)->funcs = (v); \
} while (0)
#define DUK_HCOMPILEDFUNCTION_GET_BYTECODE(heap,h) \
((h)->bytecode)
#define DUK_HCOMPILEDFUNCTION_SET_BYTECODE(heap,h,v) do { \
(h)->bytecode = (v); \
} while (0)
#endif
/*
* Accessor macros for function specific data areas
*/
/* Note: assumes 'data' is always a fixed buffer */
#define DUK_HCOMPILEDFUNCTION_GET_BUFFER_BASE(heap,h) \
DUK_HBUFFER_FIXED_GET_DATA_PTR((heap), DUK_HCOMPILEDFUNCTION_GET_DATA((heap), (h)))
#define DUK_HCOMPILEDFUNCTION_GET_CONSTS_BASE(heap,h) \
((duk_tval *) (void *) DUK_HCOMPILEDFUNCTION_GET_BUFFER_BASE((heap), (h)))
#define DUK_HCOMPILEDFUNCTION_GET_FUNCS_BASE(heap,h) \
DUK_HCOMPILEDFUNCTION_GET_FUNCS((heap), (h))
#define DUK_HCOMPILEDFUNCTION_GET_CODE_BASE(heap,h) \
DUK_HCOMPILEDFUNCTION_GET_BYTECODE((heap), (h))
#define DUK_HCOMPILEDFUNCTION_GET_CONSTS_END(heap,h) \
((duk_tval *) (void *) DUK_HCOMPILEDFUNCTION_GET_FUNCS((heap), (h)))
#define DUK_HCOMPILEDFUNCTION_GET_FUNCS_END(heap,h) \
((duk_hobject **) (void *) DUK_HCOMPILEDFUNCTION_GET_BYTECODE((heap), (h)))
/* XXX: double evaluation of DUK_HCOMPILEDFUNCTION_GET_DATA() */
#define DUK_HCOMPILEDFUNCTION_GET_CODE_END(heap,h) \
((duk_instr_t *) (void *) (DUK_HBUFFER_FIXED_GET_DATA_PTR((heap), DUK_HCOMPILEDFUNCTION_GET_DATA((heap), (h))) + \
DUK_HBUFFER_GET_SIZE((duk_hbuffer *) DUK_HCOMPILEDFUNCTION_GET_DATA((heap), h))))
#define DUK_HCOMPILEDFUNCTION_GET_CONSTS_SIZE(heap,h) \
( \
(duk_size_t) \
( \
((const duk_uint8_t *) DUK_HCOMPILEDFUNCTION_GET_CONSTS_END((heap), (h))) - \
((const duk_uint8_t *) DUK_HCOMPILEDFUNCTION_GET_CONSTS_BASE((heap), (h))) \
) \
)
#define DUK_HCOMPILEDFUNCTION_GET_FUNCS_SIZE(heap,h) \
( \
(duk_size_t) \
( \
((const duk_uint8_t *) DUK_HCOMPILEDFUNCTION_GET_FUNCS_END((heap), (h))) - \
((const duk_uint8_t *) DUK_HCOMPILEDFUNCTION_GET_FUNCS_BASE((heap), (h))) \
) \
)
#define DUK_HCOMPILEDFUNCTION_GET_CODE_SIZE(heap,h) \
( \
(duk_size_t) \
( \
((const duk_uint8_t *) DUK_HCOMPILEDFUNCTION_GET_CODE_END((heap),(h))) - \
((const duk_uint8_t *) DUK_HCOMPILEDFUNCTION_GET_CODE_BASE((heap),(h))) \
) \
)
#define DUK_HCOMPILEDFUNCTION_GET_CONSTS_COUNT(heap,h) \
((duk_size_t) (DUK_HCOMPILEDFUNCTION_GET_CONSTS_SIZE((heap), (h)) / sizeof(duk_tval)))
#define DUK_HCOMPILEDFUNCTION_GET_FUNCS_COUNT(heap,h) \
((duk_size_t) (DUK_HCOMPILEDFUNCTION_GET_FUNCS_SIZE((heap), (h)) / sizeof(duk_hobject *)))
#define DUK_HCOMPILEDFUNCTION_GET_CODE_COUNT(heap,h) \
((duk_size_t) (DUK_HCOMPILEDFUNCTION_GET_CODE_SIZE((heap), (h)) / sizeof(duk_instr_t)))
/*
* Main struct
*/
struct duk_hcompiledfunction {
/* shared object part */
duk_hobject obj;
/*
* Pointers to function data area for faster access. Function
* data is a buffer shared between all closures of the same
* "template" function. The data buffer is always fixed (non-
* dynamic, hence stable), with a layout as follows:
*
* constants (duk_tval)
* inner functions (duk_hobject *)
* bytecode (duk_instr_t)
*
* Note: bytecode end address can be computed from 'data' buffer
* size. It is not strictly necessary functionally, assuming
* bytecode never jumps outside its allocated area. However,
* it's a safety/robustness feature for avoiding the chance of
* executing random data as bytecode due to a compiler error.
*
* Note: values in the data buffer must be incref'd (they will
* be decref'd on release) for every compiledfunction referring
* to the 'data' element.
*/
/* Data area, fixed allocation, stable data ptrs. */
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t data16;
#else
duk_hbuffer *data;
#endif
/* No need for constants pointer (= same as data).
*
* When using 16-bit packing alignment to 4 is nice. 'funcs' will be
* 4-byte aligned because 'constants' are duk_tvals. For now the
* inner function pointers are not compressed, so that 'bytecode' will
* also be 4-byte aligned.
*/
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t funcs16;
duk_uint16_t bytecode16;
#else
duk_hobject **funcs;
duk_instr_t *bytecode;
#endif
/*
* 'nregs' registers are allocated on function entry, at most 'nargs'
* are initialized to arguments, and the rest to undefined. Arguments
* above 'nregs' are not mapped to registers. All registers in the
* active stack range must be initialized because they are GC reachable.
* 'nargs' is needed so that if the function is given more than 'nargs'
* arguments, the additional arguments do not 'clobber' registers
* beyond 'nregs' which must be consistently initialized to undefined.
*
* Usually there is no need to know which registers are mapped to
* local variables. Registers may be allocated to variable in any
* way (even including gaps). However, a register-variable mapping
* must be the same for the duration of the function execution and
* the register cannot be used for anything else.
*
* When looking up variables by name, the '_Varmap' map is used.
* When an activation closes, registers mapped to arguments are
* copied into the environment record based on the same map. The
* reverse map (from register to variable) is not currently needed
* at run time, except for debugging, so it is not maintained.
*/
duk_uint16_t nregs; /* regs to allocate */
duk_uint16_t nargs; /* number of arguments allocated to regs */
/*
* Additional control information is placed into the object itself
* as internal properties to avoid unnecessary fields for the
* majority of functions. The compiler tries to omit internal
* control fields when possible.
*
* Function templates:
*
* {
* name: "func", // declaration, named function expressions
* fileName: <debug info for creating nice errors>
* _Varmap: { "arg1": 0, "arg2": 1, "varname": 2 },
* _Formals: [ "arg1", "arg2" ],
* _Source: "function func(arg1, arg2) { ... }",
* _Pc2line: <debug info for pc-to-line mapping>,
* }
*
* Function instances:
*
* {
* length: 2,
* prototype: { constructor: <func> },
* caller: <thrower>,
* arguments: <thrower>,
* name: "func", // declaration, named function expressions
* fileName: <debug info for creating nice errors>
* _Varmap: { "arg1": 0, "arg2": 1, "varname": 2 },
* _Formals: [ "arg1", "arg2" ],
* _Source: "function func(arg1, arg2) { ... }",
* _Pc2line: <debug info for pc-to-line mapping>,
* _Varenv: <variable environment of closure>,
* _Lexenv: <lexical environment of closure (if differs from _Varenv)>
* }
*
* More detailed description of these properties can be found
* in the documentation.
*/
#if defined(DUK_USE_DEBUGGER_SUPPORT)
/* Line number range for function. Needed during debugging to
* determine active breakpoints.
*/
duk_uint32_t start_line;
duk_uint32_t end_line;
#endif
};
#endif /* DUK_HCOMPILEDFUNCTION_H_INCLUDED */
#line 1 "duk_hnativefunction.h"
/*
* Heap native function representation.
*/
#ifndef DUK_HNATIVEFUNCTION_H_INCLUDED
#define DUK_HNATIVEFUNCTION_H_INCLUDED
#define DUK_HNATIVEFUNCTION_NARGS_VARARGS ((duk_int16_t) -1)
#define DUK_HNATIVEFUNCTION_NARGS_MAX ((duk_int16_t) 0x7fff)
struct duk_hnativefunction {
/* shared object part */
duk_hobject obj;
duk_c_function func;
duk_int16_t nargs;
duk_int16_t magic;
/* The 'magic' field allows an opaque 16-bit field to be accessed by the
* Duktape/C function. This allows, for instance, the same native function
* to be used for a set of very similar functions, with the 'magic' field
* providing the necessary non-argument flags / values to guide the behavior
* of the native function. The value is signed on purpose: it is easier to
* convert a signed value to unsigned (simply AND with 0xffff) than vice
* versa.
*
* Note: cannot place nargs/magic into the heaphdr flags, because
* duk_hobject takes almost all flags already (and needs the spare).
*/
};
#endif /* DUK_HNATIVEFUNCTION_H_INCLUDED */
#line 1 "duk_hbufferobject.h"
/*
* Heap Buffer object representation. Used for all Buffer variants.
*/
#ifndef DUK_HBUFFEROBJECT_H_INCLUDED
#define DUK_HBUFFEROBJECT_H_INCLUDED
/* All element accessors are host endian now (driven by TypedArray spec). */
#define DUK_HBUFFEROBJECT_ELEM_UINT8 0
#define DUK_HBUFFEROBJECT_ELEM_UINT8CLAMPED 1
#define DUK_HBUFFEROBJECT_ELEM_INT8 2
#define DUK_HBUFFEROBJECT_ELEM_UINT16 3
#define DUK_HBUFFEROBJECT_ELEM_INT16 4
#define DUK_HBUFFEROBJECT_ELEM_UINT32 5
#define DUK_HBUFFEROBJECT_ELEM_INT32 6
#define DUK_HBUFFEROBJECT_ELEM_FLOAT32 7
#define DUK_HBUFFEROBJECT_ELEM_FLOAT64 8
#define DUK_HBUFFEROBJECT_ELEM_MAX 8
#define DUK_ASSERT_HBUFFEROBJECT_VALID(h) do { \
DUK_ASSERT((h) != NULL); \
DUK_ASSERT((h)->shift <= 3); \
DUK_ASSERT((h)->elem_type <= DUK_HBUFFEROBJECT_ELEM_MAX); \
DUK_ASSERT(((h)->shift == 0 && (h)->elem_type == DUK_HBUFFEROBJECT_ELEM_UINT8) || \
((h)->shift == 0 && (h)->elem_type == DUK_HBUFFEROBJECT_ELEM_UINT8CLAMPED) || \
((h)->shift == 0 && (h)->elem_type == DUK_HBUFFEROBJECT_ELEM_INT8) || \
((h)->shift == 1 && (h)->elem_type == DUK_HBUFFEROBJECT_ELEM_UINT16) || \
((h)->shift == 1 && (h)->elem_type == DUK_HBUFFEROBJECT_ELEM_INT16) || \
((h)->shift == 2 && (h)->elem_type == DUK_HBUFFEROBJECT_ELEM_UINT32) || \
((h)->shift == 2 && (h)->elem_type == DUK_HBUFFEROBJECT_ELEM_INT32) || \
((h)->shift == 2 && (h)->elem_type == DUK_HBUFFEROBJECT_ELEM_FLOAT32) || \
((h)->shift == 3 && (h)->elem_type == DUK_HBUFFEROBJECT_ELEM_FLOAT64)); \
DUK_ASSERT((h)->is_view == 0 || (h)->is_view == 1); \
DUK_ASSERT(DUK_HOBJECT_IS_BUFFEROBJECT((duk_hobject *) (h))); \
if ((h)->buf == NULL) { \
DUK_ASSERT((h)->offset == 0); \
DUK_ASSERT((h)->length == 0); \
} else { \
/* No assertions for offset or length; in particular, \
* it's OK for length to be longer than underlying \
* buffer. Just ensure they don't wrap when added. \
*/ \
DUK_ASSERT((h)->offset + (h)->length >= (h)->offset); \
} \
} while (0)
/* Get the current data pointer (caller must ensure buf != NULL) as a
* duk_uint8_t ptr.
*/
#define DUK_HBUFFEROBJECT_GET_SLICE_BASE(heap,h) \
(DUK_ASSERT_EXPR((h) != NULL), DUK_ASSERT_EXPR((h)->buf != NULL), \
(((duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR((heap), (h)->buf)) + (h)->offset))
/* True if slice is full, i.e. offset is zero and length covers the entire
* buffer. This status may change independently of the duk_hbufferobject if
* the underlying buffer is dynamic and changes without the hbufferobject
* being changed.
*/
#define DUK_HBUFFEROBJECT_FULL_SLICE(h) \
(DUK_ASSERT_EXPR((h) != NULL), DUK_ASSERT_EXPR((h)->buf != NULL), \
((h)->offset == 0 && (h)->length == DUK_HBUFFER_GET_SIZE((h)->buf)))
/* Validate that the whole slice [0,length[ is contained in the underlying
* buffer. Caller must ensure 'buf' != NULL.
*/
#define DUK_HBUFFEROBJECT_VALID_SLICE(h) \
(DUK_ASSERT_EXPR((h) != NULL), DUK_ASSERT_EXPR((h)->buf != NULL), \
((h)->offset + (h)->length <= DUK_HBUFFER_GET_SIZE((h)->buf)))
/* Validate byte read/write for virtual 'offset', i.e. check that the
* offset, taking into account h->offset, is within the underlying
* buffer size. This is a safety check which is needed to ensure
* that even a misconfigured duk_hbufferobject never causes memory
* unsafe behavior (e.g. if an underlying dynamic buffer changes
* after being setup). Caller must ensure 'buf' != NULL.
*/
#define DUK_HBUFFEROBJECT_VALID_BYTEOFFSET_INCL(h,off) \
(DUK_ASSERT_EXPR((h) != NULL), DUK_ASSERT_EXPR((h)->buf != NULL), \
((h)->offset + (off) < DUK_HBUFFER_GET_SIZE((h)->buf)))
#define DUK_HBUFFEROBJECT_VALID_BYTEOFFSET_EXCL(h,off) \
(DUK_ASSERT_EXPR((h) != NULL), DUK_ASSERT_EXPR((h)->buf != NULL), \
((h)->offset + (off) <= DUK_HBUFFER_GET_SIZE((h)->buf)))
/* Clamp an input byte length (already assumed to be within the nominal
* duk_hbufferobject 'length') to the current dynamic buffer limits to
* yield a byte length limit that's safe for memory accesses. This value
* can be invalidated by any side effect because it may trigger a user
* callback that resizes the underlying buffer.
*/
#define DUK_HBUFFEROBJECT_CLAMP_BYTELENGTH(h,len) \
(DUK_ASSERT_EXPR((h) != NULL), \
duk_hbufferobject_clamp_bytelength((h), (len)))
struct duk_hbufferobject {
/* Shared object part. */
duk_hobject obj;
/* Underlying buffer (refcounted), may be NULL. */
duk_hbuffer *buf;
/* Slice and accessor information.
*
* Because the underlying buffer may be dynamic, these may be
* invalidated by the buffer being modified so that both offset
* and length should be validated before every access. Behavior
* when the underlying buffer has changed doesn't need to be clean:
* virtual 'length' doesn't need to be affected, reads can return
* zero/NaN, and writes can be ignored.
*
* Note that a data pointer cannot be precomputed because 'buf' may
* be dynamic and its pointer unstable.
*/
duk_uint_t offset; /* byte offset to buf */
duk_uint_t length; /* byte index limit for element access, exclusive */
duk_uint8_t shift; /* element size shift:
* 0 = u8/i8
* 1 = u16/i16
* 2 = u32/i32/float
* 3 = double
*/
duk_uint8_t elem_type; /* element type */
duk_uint8_t is_view;
};
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL_DECL duk_uint_t duk_hbufferobject_clamp_bytelength(duk_hbufferobject *h_bufobj, duk_uint_t len);
#endif
DUK_INTERNAL_DECL void duk_hbufferobject_push_validated_read(duk_context *ctx, duk_hbufferobject *h_bufobj, duk_uint8_t *p, duk_small_uint_t elem_size);
DUK_INTERNAL_DECL void duk_hbufferobject_validated_write(duk_context *ctx, duk_hbufferobject *h_bufobj, duk_uint8_t *p, duk_small_uint_t elem_size);
#endif /* DUK_HBUFFEROBJECT_H_INCLUDED */
#line 1 "duk_hthread.h"
/*
* Heap thread object representation.
*
* duk_hthread is also the 'context' (duk_context) for exposed APIs
* which mostly operate on the topmost frame of the value stack.
*/
#ifndef DUK_HTHREAD_H_INCLUDED
#define DUK_HTHREAD_H_INCLUDED
/*
* Stack constants
*/
#define DUK_VALSTACK_GROW_STEP 128 /* roughly 1 kiB */
#define DUK_VALSTACK_SHRINK_THRESHOLD 256 /* roughly 2 kiB */
#define DUK_VALSTACK_SHRINK_SPARE 64 /* roughly 0.5 kiB */
#define DUK_VALSTACK_INITIAL_SIZE 128 /* roughly 1.0 kiB -> but rounds up to DUK_VALSTACK_GROW_STEP in practice */
#define DUK_VALSTACK_INTERNAL_EXTRA 64 /* internal extra elements assumed on function entry,
* always added to user-defined 'extra' for e.g. the
* duk_check_stack() call.
*/
#define DUK_VALSTACK_API_ENTRY_MINIMUM DUK_API_ENTRY_STACK
/* number of elements guaranteed to be user accessible
* (in addition to call arguments) on Duktape/C function entry.
*/
/* Note: DUK_VALSTACK_INITIAL_SIZE must be >= DUK_VALSTACK_API_ENTRY_MINIMUM
* + DUK_VALSTACK_INTERNAL_EXTRA so that the initial stack conforms to spare
* requirements.
*/
#define DUK_VALSTACK_DEFAULT_MAX 1000000L
#define DUK_CALLSTACK_GROW_STEP 8 /* roughly 256 bytes */
#define DUK_CALLSTACK_SHRINK_THRESHOLD 16 /* roughly 512 bytes */
#define DUK_CALLSTACK_SHRINK_SPARE 8 /* roughly 256 bytes */
#define DUK_CALLSTACK_INITIAL_SIZE 8
#define DUK_CALLSTACK_DEFAULT_MAX 10000L
#define DUK_CATCHSTACK_GROW_STEP 4 /* roughly 64 bytes */
#define DUK_CATCHSTACK_SHRINK_THRESHOLD 8 /* roughly 128 bytes */
#define DUK_CATCHSTACK_SHRINK_SPARE 4 /* roughly 64 bytes */
#define DUK_CATCHSTACK_INITIAL_SIZE 4
#define DUK_CATCHSTACK_DEFAULT_MAX 10000L
/*
* Activation defines
*/
#define DUK_ACT_FLAG_STRICT (1 << 0) /* function executes in strict mode */
#define DUK_ACT_FLAG_TAILCALLED (1 << 1) /* activation has tail called one or more times */
#define DUK_ACT_FLAG_CONSTRUCT (1 << 2) /* function executes as a constructor (called via "new") */
#define DUK_ACT_FLAG_PREVENT_YIELD (1 << 3) /* activation prevents yield (native call or "new") */
#define DUK_ACT_FLAG_DIRECT_EVAL (1 << 4) /* activation is a direct eval call */
#define DUK_ACT_FLAG_BREAKPOINT_ACTIVE (1 << 5) /* activation has active breakpoint(s) */
#define DUK_ACT_GET_FUNC(act) ((act)->func)
/*
* Flags for __FILE__ / __LINE__ registered into tracedata
*/
#define DUK_TB_FLAG_NOBLAME_FILELINE (1 << 0) /* don't report __FILE__ / __LINE__ as fileName/lineNumber */
/*
* Catcher defines
*/
/* flags field: LLLLLLFT, L = label (24 bits), F = flags (4 bits), T = type (4 bits) */
#define DUK_CAT_TYPE_MASK 0x0000000fUL
#define DUK_CAT_TYPE_BITS 4
#define DUK_CAT_LABEL_MASK 0xffffff00UL
#define DUK_CAT_LABEL_BITS 24
#define DUK_CAT_LABEL_SHIFT 8
#define DUK_CAT_FLAG_CATCH_ENABLED (1 << 4) /* catch part will catch */
#define DUK_CAT_FLAG_FINALLY_ENABLED (1 << 5) /* finally part will catch */
#define DUK_CAT_FLAG_CATCH_BINDING_ENABLED (1 << 6) /* request to create catch binding */
#define DUK_CAT_FLAG_LEXENV_ACTIVE (1 << 7) /* catch or with binding is currently active */
#define DUK_CAT_TYPE_UNKNOWN 0
#define DUK_CAT_TYPE_TCF 1
#define DUK_CAT_TYPE_LABEL 2
#define DUK_CAT_GET_TYPE(c) ((c)->flags & DUK_CAT_TYPE_MASK)
#define DUK_CAT_GET_LABEL(c) (((c)->flags & DUK_CAT_LABEL_MASK) >> DUK_CAT_LABEL_SHIFT)
#define DUK_CAT_HAS_CATCH_ENABLED(c) ((c)->flags & DUK_CAT_FLAG_CATCH_ENABLED)
#define DUK_CAT_HAS_FINALLY_ENABLED(c) ((c)->flags & DUK_CAT_FLAG_FINALLY_ENABLED)
#define DUK_CAT_HAS_CATCH_BINDING_ENABLED(c) ((c)->flags & DUK_CAT_FLAG_CATCH_BINDING_ENABLED)
#define DUK_CAT_HAS_LEXENV_ACTIVE(c) ((c)->flags & DUK_CAT_FLAG_LEXENV_ACTIVE)
#define DUK_CAT_SET_CATCH_ENABLED(c) do { \
(c)->flags |= DUK_CAT_FLAG_CATCH_ENABLED; \
} while (0)
#define DUK_CAT_SET_FINALLY_ENABLED(c) do { \
(c)->flags |= DUK_CAT_FLAG_FINALLY_ENABLED; \
} while (0)
#define DUK_CAT_SET_CATCH_BINDING_ENABLED(c) do { \
(c)->flags |= DUK_CAT_FLAG_CATCH_BINDING_ENABLED; \
} while (0)
#define DUK_CAT_SET_LEXENV_ACTIVE(c) do { \
(c)->flags |= DUK_CAT_FLAG_LEXENV_ACTIVE; \
} while (0)
#define DUK_CAT_CLEAR_CATCH_ENABLED(c) do { \
(c)->flags &= ~DUK_CAT_FLAG_CATCH_ENABLED; \
} while (0)
#define DUK_CAT_CLEAR_FINALLY_ENABLED(c) do { \
(c)->flags &= ~DUK_CAT_FLAG_FINALLY_ENABLED; \
} while (0)
#define DUK_CAT_CLEAR_CATCH_BINDING_ENABLED(c) do { \
(c)->flags &= ~DUK_CAT_FLAG_CATCH_BINDING_ENABLED; \
} while (0)
#define DUK_CAT_CLEAR_LEXENV_ACTIVE(c) do { \
(c)->flags &= ~DUK_CAT_FLAG_LEXENV_ACTIVE; \
} while (0)
/*
* Thread defines
*/
#if defined(DUK_USE_ROM_STRINGS)
#define DUK_HTHREAD_GET_STRING(thr,idx) \
((duk_hstring *) DUK_LOSE_CONST(duk_rom_strings_stridx[(idx)]))
#else /* DUK_USE_ROM_STRINGS */
#if defined(DUK_USE_HEAPPTR16)
#define DUK_HTHREAD_GET_STRING(thr,idx) \
((duk_hstring *) DUK_USE_HEAPPTR_DEC16((thr)->heap->heap_udata, (thr)->strs16[(idx)]))
#else
#define DUK_HTHREAD_GET_STRING(thr,idx) \
((thr)->strs[(idx)])
#endif
#endif /* DUK_USE_ROM_STRINGS */
#define DUK_HTHREAD_GET_CURRENT_ACTIVATION(thr) (&(thr)->callstack[(thr)->callstack_top - 1])
/* values for the state field */
#define DUK_HTHREAD_STATE_INACTIVE 1 /* thread not currently running */
#define DUK_HTHREAD_STATE_RUNNING 2 /* thread currently running (only one at a time) */
#define DUK_HTHREAD_STATE_RESUMED 3 /* thread resumed another thread (active but not running) */
#define DUK_HTHREAD_STATE_YIELDED 4 /* thread has yielded */
#define DUK_HTHREAD_STATE_TERMINATED 5 /* thread has terminated */
/* Executor interrupt default interval when nothing else requires a
* smaller value. The default interval must be small enough to allow
* for reasonable execution timeout checking but large enough to keep
* impact on execution performance low.
*/
#if defined(DUK_USE_INTERRUPT_COUNTER)
#define DUK_HTHREAD_INTCTR_DEFAULT (256L * 1024L)
#endif
/*
* Assert context is valid: non-NULL pointer, fields look sane.
*
* This is used by public API call entrypoints to catch invalid 'ctx' pointers
* as early as possible; invalid 'ctx' pointers cause very odd and difficult to
* diagnose behavior so it's worth checking even when the check is not 100%.
*/
#if defined(DUK_USE_PREFER_SIZE)
#define DUK_ASSERT_CTX_VSSIZE(ctx) /*nop*/
#else
#define DUK_ASSERT_CTX_VSSIZE(ctx) \
DUK_ASSERT((duk_size_t) (((duk_hthread *) (ctx))->valstack_end - ((duk_hthread *) (ctx))->valstack) == \
((duk_hthread *) (ctx))->valstack_size)
#endif
#define DUK_ASSERT_CTX_VALID(ctx) do { \
DUK_ASSERT((ctx) != NULL); \
DUK_ASSERT(DUK_HEAPHDR_GET_TYPE((duk_heaphdr *) (ctx)) == DUK_HTYPE_OBJECT); \
DUK_ASSERT(DUK_HOBJECT_IS_THREAD((duk_hobject *) (ctx))); \
DUK_ASSERT(((duk_hthread *) (ctx))->unused1 == 0); \
DUK_ASSERT(((duk_hthread *) (ctx))->unused2 == 0); \
DUK_ASSERT(((duk_hthread *) (ctx))->valstack != NULL); \
DUK_ASSERT(((duk_hthread *) (ctx))->valstack_end >= ((duk_hthread *) (ctx))->valstack); \
DUK_ASSERT(((duk_hthread *) (ctx))->valstack_top >= ((duk_hthread *) (ctx))->valstack); \
DUK_ASSERT(((duk_hthread *) (ctx))->valstack_top >= ((duk_hthread *) (ctx))->valstack_bottom); \
DUK_ASSERT(((duk_hthread *) (ctx))->valstack_end >= ((duk_hthread *) (ctx))->valstack_top); \
DUK_ASSERT_CTX_VSSIZE((ctx)); \
} while (0)
/*
* Struct defines
*/
/* XXX: for a memory-code tradeoff, remove 'func' and make it's access either a function
* or a macro. This would make the activation 32 bytes long on 32-bit platforms again.
*/
/* Note: it's nice if size is 2^N (at least for 32-bit platforms). */
struct duk_activation {
duk_tval tv_func; /* borrowed: full duk_tval for function being executed; for lightfuncs */
duk_hobject *func; /* borrowed: function being executed; for bound function calls, this is the final, real function, NULL for lightfuncs */
duk_hobject *var_env; /* current variable environment (may be NULL if delayed) */
duk_hobject *lex_env; /* current lexical environment (may be NULL if delayed) */
#ifdef DUK_USE_NONSTD_FUNC_CALLER_PROPERTY
/* Previous value of 'func' caller, restored when unwound. Only in use
* when 'func' is non-strict.
*/
duk_hobject *prev_caller;
#endif
duk_instr_t *curr_pc; /* next instruction to execute (points to 'func' bytecode, stable pointer), NULL for native calls */
#if defined(DUK_USE_DEBUGGER_SUPPORT)
duk_uint32_t prev_line; /* needed for stepping */
#endif
duk_small_uint_t flags;
/* idx_bottom and idx_retval are only used for book-keeping of
* Ecmascript-initiated calls, to allow returning to an Ecmascript
* function properly. They are duk_size_t to match the convention
* that value stack sizes are duk_size_t and local frame indices
* are duk_idx_t.
*/
/* Bottom of valstack for this activation, used to reset
* valstack_bottom on return; index is absolute. Note:
* idx_top not needed because top is set to 'nregs' always
* when returning to an Ecmascript activation.
*/
duk_size_t idx_bottom;
/* Return value when returning to this activation (points to caller
* reg, not callee reg); index is absolute (only set if activation is
* not topmost).
*
* Note: idx_bottom is always set, while idx_retval is only applicable
* for activations below the topmost one. Currently idx_retval for
* the topmost activation is considered garbage (and it not initialized
* on entry or cleared on return; may contain previous or garbage
* values).
*/
duk_size_t idx_retval;
/* Current 'this' binding is the value just below idx_bottom.
* Previously, 'this' binding was handled with an index to the
* (calling) valstack. This works for everything except tail
* calls, which must not "cumulate" valstack temps.
*/
};
/* Note: it's nice if size is 2^N (not 4x4 = 16 bytes on 32 bit) */
struct duk_catcher {
duk_hstring *h_varname; /* borrowed reference to catch variable name (or NULL if none) */
/* (reference is valid as long activation exists) */
duk_instr_t *pc_base; /* resume execution from pc_base or pc_base+1 (points to 'func' bytecode, stable pointer) */
duk_size_t callstack_index; /* callstack index of related activation */
duk_size_t idx_base; /* idx_base and idx_base+1 get completion value and type */
duk_uint32_t flags; /* type and control flags, label number */
};
struct duk_hthread {
/* Shared object part */
duk_hobject obj;
/* Pointer to bytecode executor's 'curr_pc' variable. Used to copy
* the current PC back into the topmost activation when activation
* state is about to change (or "syncing" is otherwise needed). This
* is rather awkward but important for performance, see execution.rst.
*/
duk_instr_t **ptr_curr_pc;
/* Backpointers. */
duk_heap *heap;
/* Current strictness flag: affects API calls. */
duk_uint8_t strict;
/* Thread state. */
duk_uint8_t state;
duk_uint8_t unused1;
duk_uint8_t unused2;
/* Sanity limits for stack sizes. */
duk_size_t valstack_max;
duk_size_t callstack_max;
duk_size_t catchstack_max;
/* XXX: Valstack, callstack, and catchstack are currently assumed
* to have non-NULL pointers. Relaxing this would not lead to big
* benefits (except perhaps for terminated threads).
*/
/* Value stack: these are expressed as pointers for faster stack manipulation.
* [valstack,valstack_top[ is GC-reachable, [valstack_top,valstack_end[ is
* not GC-reachable but kept initialized as 'undefined'.
*/
duk_tval *valstack; /* start of valstack allocation */
duk_tval *valstack_end; /* end of valstack allocation (exclusive) */
duk_tval *valstack_bottom; /* bottom of current frame */
duk_tval *valstack_top; /* top of current frame (exclusive) */
#if !defined(DUK_USE_PREFER_SIZE)
duk_size_t valstack_size; /* cached: valstack_end - valstack (in entries, not bytes) */
#endif
/* Call stack. [0,callstack_top[ is GC reachable. */
duk_activation *callstack;
duk_size_t callstack_size; /* allocation size */
duk_size_t callstack_top; /* next to use, highest used is top - 1 */
duk_size_t callstack_preventcount; /* number of activation records in callstack preventing a yield */
/* Catch stack. [0,catchstack_top[ is GC reachable. */
duk_catcher *catchstack;
duk_size_t catchstack_size; /* allocation size */
duk_size_t catchstack_top; /* next to use, highest used is top - 1 */
/* Yield/resume book-keeping. */
duk_hthread *resumer; /* who resumed us (if any) */
/* Current compiler state (if any), used for augmenting SyntaxErrors. */
duk_compiler_ctx *compile_ctx;
#if defined(DUK_USE_INTERRUPT_COUNTER)
/* Interrupt counter for triggering a slow path check for execution
* timeout, debugger interaction such as breakpoints, etc. The value
* is valid for the current running thread, and both the init and
* counter values are copied whenever a thread switch occurs. It's
* important for the counter to be conveniently accessible for the
* bytecode executor inner loop for performance reasons.
*/
duk_int_t interrupt_counter; /* countdown state */
duk_int_t interrupt_init; /* start value for current countdown */
#endif
/* Builtin-objects; may or may not be shared with other threads,
* threads existing in different "compartments" will have different
* built-ins. Must be stored on a per-thread basis because there
* is no intermediate structure for a thread group / compartment.
* This takes quite a lot of space, currently 43x4 = 172 bytes on
* 32-bit platforms.
*
* In some cases the builtins array could be ROM based, but it's
* sometimes edited (e.g. for sandboxing) so it's better to keep
* this array in RAM.
*/
duk_hobject *builtins[DUK_NUM_BUILTINS];
/* Convenience copies from heap/vm for faster access. */
#if defined(DUK_USE_ROM_STRINGS)
/* No field needed when strings are in ROM. */
#else
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t *strs16;
#else
duk_hstring **strs;
#endif
#endif
};
/*
* Prototypes
*/
DUK_INTERNAL_DECL void duk_hthread_copy_builtin_objects(duk_hthread *thr_from, duk_hthread *thr_to);
DUK_INTERNAL_DECL void duk_hthread_create_builtin_objects(duk_hthread *thr);
DUK_INTERNAL_DECL duk_bool_t duk_hthread_init_stacks(duk_heap *heap, duk_hthread *thr);
DUK_INTERNAL_DECL void duk_hthread_terminate(duk_hthread *thr);
DUK_INTERNAL_DECL void duk_hthread_callstack_grow(duk_hthread *thr);
DUK_INTERNAL_DECL void duk_hthread_callstack_shrink_check(duk_hthread *thr);
DUK_INTERNAL_DECL void duk_hthread_callstack_unwind(duk_hthread *thr, duk_size_t new_top);
DUK_INTERNAL_DECL void duk_hthread_catchstack_grow(duk_hthread *thr);
DUK_INTERNAL_DECL void duk_hthread_catchstack_shrink_check(duk_hthread *thr);
DUK_INTERNAL_DECL void duk_hthread_catchstack_unwind(duk_hthread *thr, duk_size_t new_top);
DUK_INTERNAL_DECL duk_activation *duk_hthread_get_current_activation(duk_hthread *thr);
DUK_INTERNAL_DECL void *duk_hthread_get_valstack_ptr(duk_heap *heap, void *ud); /* indirect allocs */
DUK_INTERNAL_DECL void *duk_hthread_get_callstack_ptr(duk_heap *heap, void *ud); /* indirect allocs */
DUK_INTERNAL_DECL void *duk_hthread_get_catchstack_ptr(duk_heap *heap, void *ud); /* indirect allocs */
#if defined(DUK_USE_DEBUGGER_SUPPORT)
DUK_INTERNAL_DECL duk_uint_fast32_t duk_hthread_get_act_curr_pc(duk_hthread *thr, duk_activation *act);
#endif
DUK_INTERNAL_DECL duk_uint_fast32_t duk_hthread_get_act_prev_pc(duk_hthread *thr, duk_activation *act);
DUK_INTERNAL_DECL void duk_hthread_sync_currpc(duk_hthread *thr);
DUK_INTERNAL_DECL void duk_hthread_sync_and_null_currpc(duk_hthread *thr);
#endif /* DUK_HTHREAD_H_INCLUDED */
#line 1 "duk_hbuffer.h"
/*
* Heap buffer representation.
*
* Heap allocated user data buffer which is either:
*
* 1. A fixed size buffer (data follows header statically)
* 2. A dynamic size buffer (data pointer follows header)
*
* The data pointer for a variable size buffer of zero size may be NULL.
*/
#ifndef DUK_HBUFFER_H_INCLUDED
#define DUK_HBUFFER_H_INCLUDED
/*
* Flags
*
* Fixed buffer: 0
* Dynamic buffer: DUK_HBUFFER_FLAG_DYNAMIC
* External buffer: DUK_HBUFFER_FLAG_DYNAMIC | DUK_HBUFFER_FLAG_EXTERNAL
*/
#define DUK_HBUFFER_FLAG_DYNAMIC DUK_HEAPHDR_USER_FLAG(0) /* buffer is behind a pointer, dynamic or external */
#define DUK_HBUFFER_FLAG_EXTERNAL DUK_HEAPHDR_USER_FLAG(1) /* buffer pointer is to an externally allocated buffer */
#define DUK_HBUFFER_HAS_DYNAMIC(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HBUFFER_FLAG_DYNAMIC)
#define DUK_HBUFFER_HAS_EXTERNAL(x) DUK_HEAPHDR_CHECK_FLAG_BITS(&(x)->hdr, DUK_HBUFFER_FLAG_EXTERNAL)
#define DUK_HBUFFER_SET_DYNAMIC(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HBUFFER_FLAG_DYNAMIC)
#define DUK_HBUFFER_SET_EXTERNAL(x) DUK_HEAPHDR_SET_FLAG_BITS(&(x)->hdr, DUK_HBUFFER_FLAG_EXTERNAL)
#define DUK_HBUFFER_CLEAR_DYNAMIC(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HBUFFER_FLAG_DYNAMIC)
#define DUK_HBUFFER_CLEAR_EXTERNAL(x) DUK_HEAPHDR_CLEAR_FLAG_BITS(&(x)->hdr, DUK_HBUFFER_FLAG_EXTERNAL)
/*
* Misc defines
*/
/* Impose a maximum buffer length for now. Restricted artificially to
* ensure resize computations or adding a heap header length won't
* overflow size_t and that a signed duk_int_t can hold a buffer
* length. The limit should be synchronized with DUK_HSTRING_MAX_BYTELEN.
*/
#if defined(DUK_USE_BUFLEN16)
#define DUK_HBUFFER_MAX_BYTELEN (0x0000ffffUL)
#else
/* Intentionally not 0x7fffffffUL; at least JSON code expects that
* 2*len + 2 fits in 32 bits.
*/
#define DUK_HBUFFER_MAX_BYTELEN (0x7ffffffeUL)
#endif
/*
* Field access
*/
/* Get/set the current user visible size, without accounting for a dynamic
* buffer's "spare" (= usable size).
*/
#if defined(DUK_USE_BUFLEN16)
/* size stored in duk_heaphdr unused flag bits */
#define DUK_HBUFFER_GET_SIZE(x) ((x)->hdr.h_flags >> 16)
#define DUK_HBUFFER_SET_SIZE(x,v) do { \
duk_size_t duk__v; \
duk__v = (v); \
DUK_ASSERT(duk__v <= 0xffffUL); \
(x)->hdr.h_flags = ((x)->hdr.h_flags & 0x0000ffffUL) | (((duk_uint32_t) duk__v) << 16); \
} while (0)
#define DUK_HBUFFER_ADD_SIZE(x,dv) do { \
(x)->hdr.h_flags += ((dv) << 16); \
} while (0)
#define DUK_HBUFFER_SUB_SIZE(x,dv) do { \
(x)->hdr.h_flags -= ((dv) << 16); \
} while (0)
#else
#define DUK_HBUFFER_GET_SIZE(x) (((duk_hbuffer *) (x))->size)
#define DUK_HBUFFER_SET_SIZE(x,v) do { \
((duk_hbuffer *) (x))->size = (v); \
} while (0)
#define DUK_HBUFFER_ADD_SIZE(x,dv) do { \
(x)->size += (dv); \
} while (0)
#define DUK_HBUFFER_SUB_SIZE(x,dv) do { \
(x)->size -= (dv); \
} while (0)
#endif
#define DUK_HBUFFER_FIXED_GET_SIZE(x) DUK_HBUFFER_GET_SIZE((duk_hbuffer *) (x))
#define DUK_HBUFFER_FIXED_SET_SIZE(x,v) DUK_HBUFFER_SET_SIZE((duk_hbuffer *) (x))
#define DUK_HBUFFER_DYNAMIC_GET_SIZE(x) DUK_HBUFFER_GET_SIZE((duk_hbuffer *) (x))
#define DUK_HBUFFER_DYNAMIC_SET_SIZE(x,v) DUK_HBUFFER_SET_SIZE((duk_hbuffer *) (x), (v))
#define DUK_HBUFFER_DYNAMIC_ADD_SIZE(x,dv) DUK_HBUFFER_ADD_SIZE((duk_hbuffer *) (x), (dv))
#define DUK_HBUFFER_DYNAMIC_SUB_SIZE(x,dv) DUK_HBUFFER_SUB_SIZE((duk_hbuffer *) (x), (dv))
#define DUK_HBUFFER_EXTERNAL_GET_SIZE(x) DUK_HBUFFER_GET_SIZE((duk_hbuffer *) (x))
#define DUK_HBUFFER_EXTERNAL_SET_SIZE(x,v) DUK_HBUFFER_SET_SIZE((duk_hbuffer *) (x), (v))
#define DUK_HBUFFER_FIXED_GET_DATA_PTR(heap,x) ((duk_uint8_t *) (((duk_hbuffer_fixed *) (x)) + 1))
#if defined(DUK_USE_HEAPPTR16)
#define DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(heap,x) \
((void *) DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, ((duk_heaphdr *) (x))->h_extra16))
#define DUK_HBUFFER_DYNAMIC_SET_DATA_PTR(heap,x,v) do { \
((duk_heaphdr *) (x))->h_extra16 = DUK_USE_HEAPPTR_ENC16((heap)->heap_udata, (void *) (v)); \
} while (0)
#define DUK_HBUFFER_DYNAMIC_SET_DATA_PTR_NULL(heap,x) do { \
((duk_heaphdr *) (x))->h_extra16 = 0; /* assume 0 <=> NULL */ \
} while (0)
#else
#define DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(heap,x) ((x)->curr_alloc)
#define DUK_HBUFFER_DYNAMIC_SET_DATA_PTR(heap,x,v) do { \
(x)->curr_alloc = (void *) (v); \
} while (0)
#define DUK_HBUFFER_DYNAMIC_SET_DATA_PTR_NULL(heap,x) do { \
(x)->curr_alloc = (void *) NULL; \
} while (0)
#endif
/* No pointer compression because pointer is potentially outside of
* Duktape heap.
*/
#if defined(DUK_USE_HEAPPTR16)
#define DUK_HBUFFER_EXTERNAL_GET_DATA_PTR(heap,x) \
((void *) (x)->curr_alloc)
#define DUK_HBUFFER_EXTERNAL_SET_DATA_PTR(heap,x,v) do { \
(x)->curr_alloc = (void *) (v); \
} while (0)
#define DUK_HBUFFER_EXTERNAL_SET_DATA_PTR_NULL(heap,x) do { \
(x)->curr_alloc = (void *) NULL; \
} while (0)
#else
#define DUK_HBUFFER_EXTERNAL_GET_DATA_PTR(heap,x) \
((void *) (x)->curr_alloc)
#define DUK_HBUFFER_EXTERNAL_SET_DATA_PTR(heap,x,v) do { \
(x)->curr_alloc = (void *) (v); \
} while (0)
#define DUK_HBUFFER_EXTERNAL_SET_DATA_PTR_NULL(heap,x) do { \
(x)->curr_alloc = (void *) NULL; \
} while (0)
#endif
/* Get a pointer to the current buffer contents (matching current allocation
* size). May be NULL for zero size dynamic/external buffer.
*/
#if defined(DUK_USE_HEAPPTR16)
#define DUK_HBUFFER_GET_DATA_PTR(heap,x) ( \
DUK_HBUFFER_HAS_DYNAMIC((x)) ? \
( \
DUK_HBUFFER_HAS_EXTERNAL((x)) ? \
DUK_HBUFFER_EXTERNAL_GET_DATA_PTR((heap), (duk_hbuffer_external *) (x)) : \
DUK_HBUFFER_DYNAMIC_GET_DATA_PTR((heap), (duk_hbuffer_dynamic *) (x)) \
) : \
DUK_HBUFFER_FIXED_GET_DATA_PTR((heap), (duk_hbuffer_fixed *) (x)) \
)
#else
/* Without heap pointer compression duk_hbuffer_dynamic and duk_hbuffer_external
* have the same layout so checking for fixed vs. dynamic (or external) is enough.
*/
#define DUK_HBUFFER_GET_DATA_PTR(heap,x) ( \
DUK_HBUFFER_HAS_DYNAMIC((x)) ? \
DUK_HBUFFER_DYNAMIC_GET_DATA_PTR((heap), (duk_hbuffer_dynamic *) (x)) : \
DUK_HBUFFER_FIXED_GET_DATA_PTR((heap), (duk_hbuffer_fixed *) (x)) \
)
#endif
/*
* Structs
*/
/* Shared prefix for all buffer types. */
struct duk_hbuffer {
duk_heaphdr hdr;
/* It's not strictly necessary to track the current size, but
* it is useful for writing robust native code.
*/
/* Current size (not counting a dynamic buffer's "spare"). */
#if defined(DUK_USE_BUFLEN16)
/* Stored in duk_heaphdr unused flags. */
#else
duk_size_t size;
#endif
/*
* Data following the header depends on the DUK_HBUFFER_FLAG_DYNAMIC
* flag.
*
* If the flag is clear (the buffer is a fixed size one), the buffer
* data follows the header directly, consisting of 'size' bytes.
*
* If the flag is set, the actual buffer is allocated separately, and
* a few control fields follow the header. Specifically:
*
* - a "void *" pointing to the current allocation
* - a duk_size_t indicating the full allocated size (always >= 'size')
*
* If DUK_HBUFFER_FLAG_EXTERNAL is set, the buffer has been allocated
* by user code, so that Duktape won't be able to resize it and won't
* free it. This allows buffers to point to e.g. an externally
* allocated structure such as a frame buffer.
*
* Unlike strings, no terminator byte (NUL) is guaranteed after the
* data. This would be convenient, but would pad aligned user buffers
* unnecessarily upwards in size. For instance, if user code requested
* a 64-byte dynamic buffer, 65 bytes would actually be allocated which
* would then potentially round upwards to perhaps 68 or 72 bytes.
*/
};
/* Fixed buffer; data follows struct, with proper alignment guaranteed by
* struct size.
*/
#if (DUK_USE_ALIGN_BY == 8) && defined(DUK_USE_PACK_MSVC_PRAGMA)
#pragma pack(push, 8)
#endif
struct duk_hbuffer_fixed {
/* A union is used here as a portable struct size / alignment trick:
* by adding a 32-bit or a 64-bit (unused) union member, the size of
* the struct is effectively forced to be a multiple of 4 or 8 bytes
* (respectively) without increasing the size of the struct unless
* necessary.
*/
union {
struct {
duk_heaphdr hdr;
#if defined(DUK_USE_BUFLEN16)
/* Stored in duk_heaphdr unused flags. */
#else
duk_size_t size;
#endif
} s;
#if (DUK_USE_ALIGN_BY == 4)
duk_uint32_t dummy_for_align4;
#elif (DUK_USE_ALIGN_BY == 8)
duk_double_t dummy_for_align8;
#elif (DUK_USE_ALIGN_BY == 1)
/* no extra padding */
#else
#error invalid DUK_USE_ALIGN_BY
#endif
} u;
/*
* Data follows the struct header. The struct size is padded by the
* compiler based on the struct members. This guarantees that the
* buffer data will be aligned-by-4 but not necessarily aligned-by-8.
*
* On platforms where alignment does not matter, the struct padding
* could be removed (if there is any). On platforms where alignment
* by 8 is required, the struct size must be forced to be a multiple
* of 8 by some means. Without it, some user code may break, and also
* Duktape itself breaks (e.g. the compiler stores duk_tvals in a
* dynamic buffer).
*/
}
#if (DUK_USE_ALIGN_BY == 8) && defined(DUK_USE_PACK_GCC_ATTR)
__attribute__ ((aligned (8)))
#elif (DUK_USE_ALIGN_BY == 8) && defined(DUK_USE_PACK_CLANG_ATTR)
__attribute__ ((aligned (8)))
#endif
;
#if (DUK_USE_ALIGN_BY == 8) && defined(DUK_USE_PACK_MSVC_PRAGMA)
#pragma pack(pop)
#endif
/* Dynamic buffer with 'curr_alloc' pointing to a dynamic area allocated using
* heap allocation primitives. Also used for external buffers when low memory
* options are not used.
*/
struct duk_hbuffer_dynamic {
duk_heaphdr hdr;
#if defined(DUK_USE_BUFLEN16)
/* Stored in duk_heaphdr unused flags. */
#else
duk_size_t size;
#endif
#if defined(DUK_USE_HEAPPTR16)
/* Stored in duk_heaphdr h_extra16. */
#else
void *curr_alloc; /* may be NULL if alloc_size == 0 */
#endif
/*
* Allocation size for 'curr_alloc' is alloc_size. There is no
* automatic NUL terminator for buffers (see above for rationale).
*
* 'curr_alloc' is explicitly allocated with heap allocation
* primitives and will thus always have alignment suitable for
* e.g. duk_tval and an IEEE double.
*/
};
/* External buffer with 'curr_alloc' managed by user code and pointing to an
* arbitrary address. When heap pointer compression is not used, this struct
* has the same layout as duk_hbuffer_dynamic.
*/
struct duk_hbuffer_external {
duk_heaphdr hdr;
#if defined(DUK_USE_BUFLEN16)
/* Stored in duk_heaphdr unused flags. */
#else
duk_size_t size;
#endif
/* Cannot be compressed as a heap pointer because may point to
* an arbitrary address.
*/
void *curr_alloc; /* may be NULL if alloc_size == 0 */
};
/*
* Prototypes
*/
DUK_INTERNAL_DECL duk_hbuffer *duk_hbuffer_alloc(duk_heap *heap, duk_size_t size, duk_small_uint_t flags, void **out_bufdata);
DUK_INTERNAL_DECL void *duk_hbuffer_get_dynalloc_ptr(duk_heap *heap, void *ud); /* indirect allocs */
/* dynamic buffer ops */
DUK_INTERNAL_DECL void duk_hbuffer_resize(duk_hthread *thr, duk_hbuffer_dynamic *buf, duk_size_t new_size);
DUK_INTERNAL_DECL void duk_hbuffer_reset(duk_hthread *thr, duk_hbuffer_dynamic *buf);
#endif /* DUK_HBUFFER_H_INCLUDED */
#line 1 "duk_heap.h"
/*
* Heap structure.
*
* Heap contains allocated heap objects, interned strings, and built-in
* strings for one or more threads.
*/
#ifndef DUK_HEAP_H_INCLUDED
#define DUK_HEAP_H_INCLUDED
/* alloc function typedefs in duktape.h */
/*
* Heap flags
*/
#define DUK_HEAP_FLAG_MARKANDSWEEP_RUNNING (1 << 0) /* mark-and-sweep is currently running */
#define DUK_HEAP_FLAG_MARKANDSWEEP_RECLIMIT_REACHED (1 << 1) /* mark-and-sweep marking reached a recursion limit and must use multi-pass marking */
#define DUK_HEAP_FLAG_REFZERO_FREE_RUNNING (1 << 2) /* refcount code is processing refzero list */
#define DUK_HEAP_FLAG_ERRHANDLER_RUNNING (1 << 3) /* an error handler (user callback to augment/replace error) is running */
#define DUK_HEAP_FLAG_INTERRUPT_RUNNING (1 << 4) /* executor interrupt running (used to avoid nested interrupts) */
#define DUK_HEAP_FLAG_FINALIZER_NORESCUE (1 << 5) /* heap destruction ongoing, finalizer rescue no longer possible */
#define DUK__HEAP_HAS_FLAGS(heap,bits) ((heap)->flags & (bits))
#define DUK__HEAP_SET_FLAGS(heap,bits) do { \
(heap)->flags |= (bits); \
} while (0)
#define DUK__HEAP_CLEAR_FLAGS(heap,bits) do { \
(heap)->flags &= ~(bits); \
} while (0)
#define DUK_HEAP_HAS_MARKANDSWEEP_RUNNING(heap) DUK__HEAP_HAS_FLAGS((heap), DUK_HEAP_FLAG_MARKANDSWEEP_RUNNING)
#define DUK_HEAP_HAS_MARKANDSWEEP_RECLIMIT_REACHED(heap) DUK__HEAP_HAS_FLAGS((heap), DUK_HEAP_FLAG_MARKANDSWEEP_RECLIMIT_REACHED)
#define DUK_HEAP_HAS_REFZERO_FREE_RUNNING(heap) DUK__HEAP_HAS_FLAGS((heap), DUK_HEAP_FLAG_REFZERO_FREE_RUNNING)
#define DUK_HEAP_HAS_ERRHANDLER_RUNNING(heap) DUK__HEAP_HAS_FLAGS((heap), DUK_HEAP_FLAG_ERRHANDLER_RUNNING)
#define DUK_HEAP_HAS_INTERRUPT_RUNNING(heap) DUK__HEAP_HAS_FLAGS((heap), DUK_HEAP_FLAG_INTERRUPT_RUNNING)
#define DUK_HEAP_HAS_FINALIZER_NORESCUE(heap) DUK__HEAP_HAS_FLAGS((heap), DUK_HEAP_FLAG_FINALIZER_NORESCUE)
#define DUK_HEAP_SET_MARKANDSWEEP_RUNNING(heap) DUK__HEAP_SET_FLAGS((heap), DUK_HEAP_FLAG_MARKANDSWEEP_RUNNING)
#define DUK_HEAP_SET_MARKANDSWEEP_RECLIMIT_REACHED(heap) DUK__HEAP_SET_FLAGS((heap), DUK_HEAP_FLAG_MARKANDSWEEP_RECLIMIT_REACHED)
#define DUK_HEAP_SET_REFZERO_FREE_RUNNING(heap) DUK__HEAP_SET_FLAGS((heap), DUK_HEAP_FLAG_REFZERO_FREE_RUNNING)
#define DUK_HEAP_SET_ERRHANDLER_RUNNING(heap) DUK__HEAP_SET_FLAGS((heap), DUK_HEAP_FLAG_ERRHANDLER_RUNNING)
#define DUK_HEAP_SET_INTERRUPT_RUNNING(heap) DUK__HEAP_SET_FLAGS((heap), DUK_HEAP_FLAG_INTERRUPT_RUNNING)
#define DUK_HEAP_SET_FINALIZER_NORESCUE(heap) DUK__HEAP_SET_FLAGS((heap), DUK_HEAP_FLAG_FINALIZER_NORESCUE)
#define DUK_HEAP_CLEAR_MARKANDSWEEP_RUNNING(heap) DUK__HEAP_CLEAR_FLAGS((heap), DUK_HEAP_FLAG_MARKANDSWEEP_RUNNING)
#define DUK_HEAP_CLEAR_MARKANDSWEEP_RECLIMIT_REACHED(heap) DUK__HEAP_CLEAR_FLAGS((heap), DUK_HEAP_FLAG_MARKANDSWEEP_RECLIMIT_REACHED)
#define DUK_HEAP_CLEAR_REFZERO_FREE_RUNNING(heap) DUK__HEAP_CLEAR_FLAGS((heap), DUK_HEAP_FLAG_REFZERO_FREE_RUNNING)
#define DUK_HEAP_CLEAR_ERRHANDLER_RUNNING(heap) DUK__HEAP_CLEAR_FLAGS((heap), DUK_HEAP_FLAG_ERRHANDLER_RUNNING)
#define DUK_HEAP_CLEAR_INTERRUPT_RUNNING(heap) DUK__HEAP_CLEAR_FLAGS((heap), DUK_HEAP_FLAG_INTERRUPT_RUNNING)
#define DUK_HEAP_CLEAR_FINALIZER_NORESCUE(heap) DUK__HEAP_CLEAR_FLAGS((heap), DUK_HEAP_FLAG_FINALIZER_NORESCUE)
/*
* Longjmp types, also double as identifying continuation type for a rethrow (in 'finally')
*/
#define DUK_LJ_TYPE_UNKNOWN 0 /* unused */
#define DUK_LJ_TYPE_THROW 1 /* value1 -> error object */
#define DUK_LJ_TYPE_YIELD 2 /* value1 -> yield value, iserror -> error / normal */
#define DUK_LJ_TYPE_RESUME 3 /* value1 -> resume value, value2 -> resumee thread, iserror -> error/normal */
#define DUK_LJ_TYPE_BREAK 4 /* value1 -> label number, pseudo-type to indicate a break continuation (for ENDFIN) */
#define DUK_LJ_TYPE_CONTINUE 5 /* value1 -> label number, pseudo-type to indicate a continue continuation (for ENDFIN) */
#define DUK_LJ_TYPE_RETURN 6 /* value1 -> return value, pseudo-type to indicate a return continuation (for ENDFIN) */
#define DUK_LJ_TYPE_NORMAL 7 /* no value, pseudo-type to indicate a normal continuation (for ENDFIN) */
/*
* Mark-and-sweep flags
*
* These are separate from heap level flags now but could be merged.
* The heap structure only contains a 'base mark-and-sweep flags'
* field and the GC caller can impose further flags.
*/
#define DUK_MS_FLAG_EMERGENCY (1 << 0) /* emergency mode: try extra hard */
#define DUK_MS_FLAG_NO_STRINGTABLE_RESIZE (1 << 1) /* don't resize stringtable (but may sweep it); needed during stringtable resize */
#define DUK_MS_FLAG_NO_OBJECT_COMPACTION (1 << 2) /* don't compact objects; needed during object property allocation resize */
#define DUK_MS_FLAG_NO_FINALIZERS (1 << 3) /* don't run finalizers; leave finalizable objects in finalize_list for next round */
#define DUK_MS_FLAG_SKIP_FINALIZERS (1 << 4) /* don't run finalizers; queue finalizable objects back to heap_allocated */
/*
* Thread switching
*
* To switch heap->curr_thread, use the macro below so that interrupt counters
* get updated correctly. The macro allows a NULL target thread because that
* happens e.g. in call handling.
*/
#if defined(DUK_USE_INTERRUPT_COUNTER)
#define DUK_HEAP_SWITCH_THREAD(heap,newthr) duk_heap_switch_thread((heap), (newthr))
#else
#define DUK_HEAP_SWITCH_THREAD(heap,newthr) do { \
(heap)->curr_thread = (newthr); \
} while (0)
#endif
/*
* Other heap related defines
*/
/* Mark-and-sweep interval is relative to combined count of objects and
* strings kept in the heap during the latest mark-and-sweep pass.
* Fixed point .8 multiplier and .0 adder. Trigger count (interval) is
* decreased by each (re)allocation attempt (regardless of size), and each
* refzero processed object.
*
* 'SKIP' indicates how many (re)allocations to wait until a retry if
* GC is skipped because there is no thread do it with yet (happens
* only during init phases).
*/
#if defined(DUK_USE_MARK_AND_SWEEP)
#if defined(DUK_USE_REFERENCE_COUNTING)
#define DUK_HEAP_MARK_AND_SWEEP_TRIGGER_MULT 12800L /* 50x heap size */
#define DUK_HEAP_MARK_AND_SWEEP_TRIGGER_ADD 1024L
#define DUK_HEAP_MARK_AND_SWEEP_TRIGGER_SKIP 256L
#else
#define DUK_HEAP_MARK_AND_SWEEP_TRIGGER_MULT 256L /* 1x heap size */
#define DUK_HEAP_MARK_AND_SWEEP_TRIGGER_ADD 1024L
#define DUK_HEAP_MARK_AND_SWEEP_TRIGGER_SKIP 256L
#endif
#endif
/* Stringcache is used for speeding up char-offset-to-byte-offset
* translations for non-ASCII strings.
*/
#define DUK_HEAP_STRCACHE_SIZE 4
#define DUK_HEAP_STRINGCACHE_NOCACHE_LIMIT 16 /* strings up to the this length are not cached */
/* helper to insert a (non-string) heap object into heap allocated list */
#define DUK_HEAP_INSERT_INTO_HEAP_ALLOCATED(heap,hdr) duk_heap_insert_into_heap_allocated((heap),(hdr))
/*
* Stringtable
*/
/* initial stringtable size, must be prime and higher than DUK_UTIL_MIN_HASH_PRIME */
#define DUK_STRTAB_INITIAL_SIZE 17
/* indicates a deleted string; any fixed non-NULL, non-hstring pointer works */
#define DUK_STRTAB_DELETED_MARKER(heap) ((duk_hstring *) heap)
/* resizing parameters */
#define DUK_STRTAB_MIN_FREE_DIVISOR 4 /* load factor max 75% */
#define DUK_STRTAB_MIN_USED_DIVISOR 4 /* load factor min 25% */
#define DUK_STRTAB_GROW_ST_SIZE(n) ((n) + (n)) /* used entries + approx 100% -> reset load to 50% */
#define DUK_STRTAB_U32_MAX_STRLEN 10 /* 4'294'967'295 */
#define DUK_STRTAB_HIGHEST_32BIT_PRIME 0xfffffffbUL
/* probe sequence (open addressing) */
#define DUK_STRTAB_HASH_INITIAL(hash,h_size) ((hash) % (h_size))
#define DUK_STRTAB_HASH_PROBE_STEP(hash) DUK_UTIL_GET_HASH_PROBE_STEP((hash))
/* fixed top level hashtable size (separate chaining) */
#define DUK_STRTAB_CHAIN_SIZE DUK_USE_STRTAB_CHAIN_SIZE
/*
* Built-in strings
*/
/* heap string indices are autogenerated in duk_strings.h */
#if defined(DUK_USE_ROM_STRINGS)
#define DUK_HEAP_GET_STRING(heap,idx) \
((duk_hstring *) DUK_LOSE_CONST(duk_rom_strings_stridx[(idx)]))
#else /* DUK_USE_ROM_STRINGS */
#if defined(DUK_USE_HEAPPTR16)
#define DUK_HEAP_GET_STRING(heap,idx) \
((duk_hstring *) DUK_USE_HEAPPTR_DEC16((heap)->heap_udata, (heap)->strs16[(idx)]))
#else
#define DUK_HEAP_GET_STRING(heap,idx) \
((heap)->strs[(idx)])
#endif
#endif /* DUK_USE_ROM_STRINGS */
/*
* Raw memory calls: relative to heap, but no GC interaction
*/
#define DUK_ALLOC_RAW(heap,size) \
((heap)->alloc_func((heap)->heap_udata, (size)))
#define DUK_REALLOC_RAW(heap,ptr,newsize) \
((heap)->realloc_func((heap)->heap_udata, (void *) (ptr), (newsize)))
#define DUK_FREE_RAW(heap,ptr) \
((heap)->free_func((heap)->heap_udata, (void *) (ptr)))
/*
* Memory calls: relative to heap, GC interaction, but no error throwing.
*
* XXX: Currently a mark-and-sweep triggered by memory allocation will run
* using the heap->heap_thread. This thread is also used for running
* mark-and-sweep finalization; this is not ideal because it breaks the
* isolation between multiple global environments.
*
* Notes:
*
* - DUK_FREE() is required to ignore NULL and any other possible return
* value of a zero-sized alloc/realloc (same as ANSI C free()).
*
* - There is no DUK_REALLOC_ZEROED because we don't assume to know the
* old size. Caller must zero the reallocated memory.
*
* - DUK_REALLOC_INDIRECT() must be used when a mark-and-sweep triggered
* by an allocation failure might invalidate the original 'ptr', thus
* causing a realloc retry to use an invalid pointer. Example: we're
* reallocating the value stack and a finalizer resizes the same value
* stack during mark-and-sweep. The indirect variant requests for the
* current location of the pointer being reallocated using a callback
* right before every realloc attempt; this circuitous approach is used
* to avoid strict aliasing issues in a more straightforward indirect
* pointer (void **) approach. Note: the pointer in the storage
* location is read but is NOT updated; the caller must do that.
*/
/* callback for indirect reallocs, request for current pointer */
typedef void *(*duk_mem_getptr)(duk_heap *heap, void *ud);
#define DUK_ALLOC(heap,size) duk_heap_mem_alloc((heap), (size))
#define DUK_ALLOC_ZEROED(heap,size) duk_heap_mem_alloc_zeroed((heap), (size))
#define DUK_REALLOC(heap,ptr,newsize) duk_heap_mem_realloc((heap), (ptr), (newsize))
#define DUK_REALLOC_INDIRECT(heap,cb,ud,newsize) duk_heap_mem_realloc_indirect((heap), (cb), (ud), (newsize))
#define DUK_FREE(heap,ptr) duk_heap_mem_free((heap), (ptr))
/*
* Memory constants
*/
#define DUK_HEAP_ALLOC_FAIL_MARKANDSWEEP_LIMIT 5 /* Retry allocation after mark-and-sweep for this
* many times. A single mark-and-sweep round is
* not guaranteed to free all unreferenced memory
* because of finalization (in fact, ANY number of
* rounds is strictly not enough).
*/
#define DUK_HEAP_ALLOC_FAIL_MARKANDSWEEP_EMERGENCY_LIMIT 3 /* Starting from this round, use emergency mode
* for mark-and-sweep.
*/
/*
* Debugger support
*/
/* Maximum number of breakpoints. Only breakpoints that are set are
* consulted so increasing this has no performance impact.
*/
#define DUK_HEAP_MAX_BREAKPOINTS 16
/* Opcode interval for a Date-based status/peek rate limit check. Only
* relevant when debugger is attached. Requesting a timestamp may be a
* slow operation on some platforms so this shouldn't be too low. On the
* other hand a high value makes Duktape react to a pause request slowly.
*/
#define DUK_HEAP_DBG_RATELIMIT_OPCODES 4000
/* Milliseconds between status notify and transport peeks. */
#define DUK_HEAP_DBG_RATELIMIT_MILLISECS 200
/* Step types */
#define DUK_STEP_TYPE_NONE 0
#define DUK_STEP_TYPE_INTO 1
#define DUK_STEP_TYPE_OVER 2
#define DUK_STEP_TYPE_OUT 3
struct duk_breakpoint {
duk_hstring *filename;
duk_uint32_t line;
};
#if defined(DUK_USE_DEBUGGER_SUPPORT)
#define DUK_HEAP_IS_DEBUGGER_ATTACHED(heap) ((heap)->dbg_read_cb != NULL)
#define DUK_HEAP_CLEAR_STEP_STATE(heap) do { \
(heap)->dbg_step_type = DUK_STEP_TYPE_NONE; \
(heap)->dbg_step_thread = NULL; \
(heap)->dbg_step_csindex = 0; \
(heap)->dbg_step_startline = 0; \
} while (0)
#define DUK_HEAP_SET_PAUSED(heap) do { \
(heap)->dbg_paused = 1; \
(heap)->dbg_state_dirty = 1; \
DUK_HEAP_CLEAR_STEP_STATE((heap)); \
} while (0)
#define DUK_HEAP_CLEAR_PAUSED(heap) do { \
(heap)->dbg_paused = 0; \
(heap)->dbg_state_dirty = 1; \
DUK_HEAP_CLEAR_STEP_STATE((heap)); \
} while (0)
#define DUK_HEAP_IS_PAUSED(heap) ((heap)->dbg_paused)
#endif /* DUK_USE_DEBUGGER_SUPPORT */
/*
* String cache should ideally be at duk_hthread level, but that would
* cause string finalization to slow down relative to the number of
* threads; string finalization must check the string cache for "weak"
* references to the string being finalized to avoid dead pointers.
*
* Thus, string caches are now at the heap level now.
*/
struct duk_strcache {
duk_hstring *h;
duk_uint32_t bidx;
duk_uint32_t cidx;
};
/*
* Longjmp state, contains the information needed to perform a longjmp.
* Longjmp related values are written to value1, value2, and iserror.
*/
struct duk_ljstate {
duk_jmpbuf *jmpbuf_ptr; /* current setjmp() catchpoint */
duk_small_uint_t type; /* longjmp type */
duk_bool_t iserror; /* isError flag for yield */
duk_tval value1; /* 1st related value (type specific) */
duk_tval value2; /* 2nd related value (type specific) */
};
/*
* Stringtable entry for fixed size stringtable
*/
struct duk_strtab_entry {
#if defined(DUK_USE_HEAPPTR16)
/* A 16-bit listlen makes sense with 16-bit heap pointers: there
* won't be space for 64k strings anyway.
*/
duk_uint16_t listlen; /* if 0, 'str16' used, if > 0, 'strlist16' used */
union {
duk_uint16_t strlist16;
duk_uint16_t str16;
} u;
#else
duk_size_t listlen; /* if 0, 'str' used, if > 0, 'strlist' used */
union {
duk_hstring **strlist;
duk_hstring *str;
} u;
#endif
};
/*
* Main heap structure
*/
struct duk_heap {
duk_small_uint_t flags;
/* Allocator functions. */
duk_alloc_function alloc_func;
duk_realloc_function realloc_func;
duk_free_function free_func;
/* Heap udata, used for allocator functions but also for other heap
* level callbacks like pointer compression, etc.
*/
void *heap_udata;
/* Precomputed pointers when using 16-bit heap pointer packing. */
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t heapptr_null16;
duk_uint16_t heapptr_deleted16;
#endif
/* Fatal error handling, called e.g. when a longjmp() is needed but
* lj.jmpbuf_ptr is NULL. fatal_func must never return; it's not
* declared as "noreturn" because doing that for typedefs is a bit
* challenging portability-wise.
*/
duk_fatal_function fatal_func;
/* allocated heap objects */
duk_heaphdr *heap_allocated;
/* work list for objects whose refcounts are zero but which have not been
* "finalized"; avoids recursive C calls when refcounts go to zero in a
* chain of objects.
*/
#if defined(DUK_USE_REFERENCE_COUNTING)
duk_heaphdr *refzero_list;
duk_heaphdr *refzero_list_tail;
#endif
#if defined(DUK_USE_MARK_AND_SWEEP)
/* mark-and-sweep control */
#if defined(DUK_USE_VOLUNTARY_GC)
duk_int_t mark_and_sweep_trigger_counter;
#endif
duk_int_t mark_and_sweep_recursion_depth;
/* mark-and-sweep flags automatically active (used for critical sections) */
duk_small_uint_t mark_and_sweep_base_flags;
/* work list for objects to be finalized (by mark-and-sweep) */
duk_heaphdr *finalize_list;
#endif
/* longjmp state */
duk_ljstate lj;
/* marker for detecting internal "double faults", see duk_error_throw.c */
duk_bool_t handling_error;
/* heap thread, used internally and for finalization */
duk_hthread *heap_thread;
/* current thread */
duk_hthread *curr_thread; /* currently running thread */
/* heap level "stash" object (e.g., various reachability roots) */
duk_hobject *heap_object;
/* duk_handle_call / duk_handle_safe_call recursion depth limiting */
duk_int_t call_recursion_depth;
duk_int_t call_recursion_limit;
/* mix-in value for computing string hashes; should be reasonably unpredictable */
duk_uint32_t hash_seed;
/* rnd_state for duk_util_tinyrandom.c */
duk_uint32_t rnd_state;
/* For manual debugging: instruction count based on executor and
* interrupt counter book-keeping. Inspect debug logs to see how
* they match up.
*/
#if defined(DUK_USE_INTERRUPT_COUNTER) && defined(DUK_USE_DEBUG)
duk_int_t inst_count_exec;
duk_int_t inst_count_interrupt;
#endif
/* debugger */
#if defined(DUK_USE_DEBUGGER_SUPPORT)
/* callbacks and udata; dbg_read_cb != NULL is used to indicate attached state */
duk_debug_read_function dbg_read_cb; /* required, NULL implies detached */
duk_debug_write_function dbg_write_cb; /* required */
duk_debug_peek_function dbg_peek_cb;
duk_debug_read_flush_function dbg_read_flush_cb;
duk_debug_write_flush_function dbg_write_flush_cb;
duk_debug_request_function dbg_request_cb;
duk_debug_detached_function dbg_detached_cb;
void *dbg_udata;
/* debugger state, only relevant when attached */
duk_bool_t dbg_processing; /* currently processing messages or breakpoints: don't enter message processing recursively (e.g. no breakpoints when processing debugger eval) */
duk_bool_t dbg_paused; /* currently paused: talk with debug client until step/resume */
duk_bool_t dbg_state_dirty; /* resend state next time executor is about to run */
duk_bool_t dbg_force_restart; /* force executor restart to recheck breakpoints; used to handle function returns (see GH-303) */
duk_bool_t dbg_detaching; /* debugger detaching; used to avoid calling detach handler recursively */
duk_small_uint_t dbg_step_type; /* step type: none, step into, step over, step out */
duk_hthread *dbg_step_thread; /* borrowed; NULL if no step state (NULLed in unwind) */
duk_size_t dbg_step_csindex; /* callstack index */
duk_uint32_t dbg_step_startline; /* starting line number */
duk_breakpoint dbg_breakpoints[DUK_HEAP_MAX_BREAKPOINTS]; /* breakpoints: [0,breakpoint_count[ gc reachable */
duk_small_uint_t dbg_breakpoint_count;
duk_breakpoint *dbg_breakpoints_active[DUK_HEAP_MAX_BREAKPOINTS + 1]; /* currently active breakpoints: NULL term, borrowed pointers */
/* XXX: make active breakpoints actual copies instead of pointers? */
/* These are for rate limiting Status notifications and transport peeking. */
duk_uint32_t dbg_exec_counter; /* cumulative opcode execution count (overflows are OK) */
duk_uint32_t dbg_last_counter; /* value of dbg_exec_counter when we last did a Date-based check */
duk_double_t dbg_last_time; /* time when status/peek was last done (Date-based rate limit) */
/* Used to support single-byte stream lookahead. */
duk_bool_t dbg_have_next_byte;
duk_uint8_t dbg_next_byte;
#endif
/* string intern table (weak refs) */
#if defined(DUK_USE_STRTAB_PROBE)
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t *strtable16;
#else
duk_hstring **strtable;
#endif
duk_uint32_t st_size; /* alloc size in elements */
duk_uint32_t st_used; /* used elements (includes DELETED) */
#endif
/* XXX: static alloc is OK until separate chaining stringtable
* resizing is implemented.
*/
#if defined(DUK_USE_STRTAB_CHAIN)
duk_strtab_entry strtable[DUK_STRTAB_CHAIN_SIZE];
#endif
/* string access cache (codepoint offset -> byte offset) for fast string
* character looping; 'weak' reference which needs special handling in GC.
*/
duk_strcache strcache[DUK_HEAP_STRCACHE_SIZE];
/* built-in strings */
#if defined(DUK_USE_ROM_STRINGS)
/* No field needed when strings are in ROM. */
#else
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t strs16[DUK_HEAP_NUM_STRINGS];
#else
duk_hstring *strs[DUK_HEAP_NUM_STRINGS];
#endif
#endif
};
/*
* Prototypes
*/
DUK_INTERNAL_DECL
duk_heap *duk_heap_alloc(duk_alloc_function alloc_func,
duk_realloc_function realloc_func,
duk_free_function free_func,
void *heap_udata,
duk_fatal_function fatal_func);
DUK_INTERNAL_DECL void duk_heap_free(duk_heap *heap);
DUK_INTERNAL_DECL void duk_free_hobject_inner(duk_heap *heap, duk_hobject *h);
DUK_INTERNAL_DECL void duk_free_hbuffer_inner(duk_heap *heap, duk_hbuffer *h);
DUK_INTERNAL_DECL void duk_free_hstring_inner(duk_heap *heap, duk_hstring *h);
DUK_INTERNAL_DECL void duk_heap_free_heaphdr_raw(duk_heap *heap, duk_heaphdr *hdr);
DUK_INTERNAL_DECL void duk_heap_insert_into_heap_allocated(duk_heap *heap, duk_heaphdr *hdr);
#if defined(DUK_USE_DOUBLE_LINKED_HEAP) && defined(DUK_USE_REFERENCE_COUNTING)
DUK_INTERNAL_DECL void duk_heap_remove_any_from_heap_allocated(duk_heap *heap, duk_heaphdr *hdr);
#endif
#if defined(DUK_USE_INTERRUPT_COUNTER)
DUK_INTERNAL_DECL void duk_heap_switch_thread(duk_heap *heap, duk_hthread *new_thr);
#endif
#if 0 /*unused*/
DUK_INTERNAL_DECL duk_hstring *duk_heap_string_lookup(duk_heap *heap, const duk_uint8_t *str, duk_uint32_t blen);
#endif
DUK_INTERNAL_DECL duk_hstring *duk_heap_string_intern(duk_heap *heap, const duk_uint8_t *str, duk_uint32_t blen);
DUK_INTERNAL_DECL duk_hstring *duk_heap_string_intern_checked(duk_hthread *thr, const duk_uint8_t *str, duk_uint32_t len);
#if 0 /*unused*/
DUK_INTERNAL_DECL duk_hstring *duk_heap_string_lookup_u32(duk_heap *heap, duk_uint32_t val);
#endif
DUK_INTERNAL_DECL duk_hstring *duk_heap_string_intern_u32(duk_heap *heap, duk_uint32_t val);
DUK_INTERNAL_DECL duk_hstring *duk_heap_string_intern_u32_checked(duk_hthread *thr, duk_uint32_t val);
#if defined(DUK_USE_REFERENCE_COUNTING)
DUK_INTERNAL_DECL void duk_heap_string_remove(duk_heap *heap, duk_hstring *h);
#endif
#if defined(DUK_USE_MARK_AND_SWEEP) && defined(DUK_USE_MS_STRINGTABLE_RESIZE)
DUK_INTERNAL_DECL void duk_heap_force_strtab_resize(duk_heap *heap);
#endif
DUK_INTERNAL void duk_heap_free_strtab(duk_heap *heap);
#if defined(DUK_USE_DEBUG)
DUK_INTERNAL void duk_heap_dump_strtab(duk_heap *heap);
#endif
DUK_INTERNAL_DECL void duk_heap_strcache_string_remove(duk_heap *heap, duk_hstring *h);
DUK_INTERNAL_DECL duk_uint_fast32_t duk_heap_strcache_offset_char2byte(duk_hthread *thr, duk_hstring *h, duk_uint_fast32_t char_offset);
#if defined(DUK_USE_PROVIDE_DEFAULT_ALLOC_FUNCTIONS)
DUK_INTERNAL_DECL void *duk_default_alloc_function(void *udata, duk_size_t size);
DUK_INTERNAL_DECL void *duk_default_realloc_function(void *udata, void *ptr, duk_size_t newsize);
DUK_INTERNAL_DECL void duk_default_free_function(void *udata, void *ptr);
#endif
DUK_INTERNAL_DECL void *duk_heap_mem_alloc(duk_heap *heap, duk_size_t size);
DUK_INTERNAL_DECL void *duk_heap_mem_alloc_zeroed(duk_heap *heap, duk_size_t size);
DUK_INTERNAL_DECL void *duk_heap_mem_realloc(duk_heap *heap, void *ptr, duk_size_t newsize);
DUK_INTERNAL_DECL void *duk_heap_mem_realloc_indirect(duk_heap *heap, duk_mem_getptr cb, void *ud, duk_size_t newsize);
DUK_INTERNAL_DECL void duk_heap_mem_free(duk_heap *heap, void *ptr);
#ifdef DUK_USE_REFERENCE_COUNTING
#if !defined(DUK_USE_FAST_REFCOUNT_DEFAULT)
DUK_INTERNAL_DECL void duk_tval_incref(duk_tval *tv);
#endif
#if 0 /* unused */
DUK_INTERNAL_DECL void duk_tval_incref_allownull(duk_tval *tv);
#endif
DUK_INTERNAL_DECL void duk_tval_decref(duk_hthread *thr, duk_tval *tv);
#if 0 /* unused */
DUK_INTERNAL_DECL void duk_tval_decref_allownull(duk_hthread *thr, duk_tval *tv);
#endif
#if !defined(DUK_USE_FAST_REFCOUNT_DEFAULT)
DUK_INTERNAL_DECL void duk_heaphdr_incref(duk_heaphdr *h);
#endif
#if 0 /* unused */
DUK_INTERNAL_DECL void duk_heaphdr_incref_allownull(duk_heaphdr *h);
#endif
DUK_INTERNAL_DECL void duk_heaphdr_decref(duk_hthread *thr, duk_heaphdr *h);
DUK_INTERNAL_DECL void duk_heaphdr_decref_allownull(duk_hthread *thr, duk_heaphdr *h);
DUK_INTERNAL_DECL void duk_heaphdr_refzero(duk_hthread *thr, duk_heaphdr *h);
DUK_INTERNAL_DECL void duk_heaphdr_refcount_finalize(duk_hthread *thr, duk_heaphdr *hdr);
#else
/* no refcounting */
#endif
#if defined(DUK_USE_MARK_AND_SWEEP)
DUK_INTERNAL_DECL duk_bool_t duk_heap_mark_and_sweep(duk_heap *heap, duk_small_uint_t flags);
#endif
DUK_INTERNAL_DECL duk_uint32_t duk_heap_hashstring(duk_heap *heap, const duk_uint8_t *str, duk_size_t len);
#endif /* DUK_HEAP_H_INCLUDED */
#line 1 "duk_debugger.h"
#ifndef DUK_DEBUGGER_H_INCLUDED
#define DUK_DEBUGGER_H_INCLUDED
/* Debugger protocol version is defined in the public API header. */
/* Initial bytes for markers. */
#define DUK_DBG_IB_EOM 0x00
#define DUK_DBG_IB_REQUEST 0x01
#define DUK_DBG_IB_REPLY 0x02
#define DUK_DBG_IB_ERROR 0x03
#define DUK_DBG_IB_NOTIFY 0x04
/* Other initial bytes. */
#define DUK_DBG_IB_INT4 0x10
#define DUK_DBG_IB_STR4 0x11
#define DUK_DBG_IB_STR2 0x12
#define DUK_DBG_IB_BUF4 0x13
#define DUK_DBG_IB_BUF2 0x14
#define DUK_DBG_IB_UNUSED 0x15
#define DUK_DBG_IB_UNDEFINED 0x16
#define DUK_DBG_IB_NULL 0x17
#define DUK_DBG_IB_TRUE 0x18
#define DUK_DBG_IB_FALSE 0x19
#define DUK_DBG_IB_NUMBER 0x1a
#define DUK_DBG_IB_OBJECT 0x1b
#define DUK_DBG_IB_POINTER 0x1c
#define DUK_DBG_IB_LIGHTFUNC 0x1d
#define DUK_DBG_IB_HEAPPTR 0x1e
/* The short string/integer initial bytes starting from 0x60 don't have
* defines now.
*/
/* Error codes. */
#define DUK_DBG_ERR_UNKNOWN 0x00
#define DUK_DBG_ERR_UNSUPPORTED 0x01
#define DUK_DBG_ERR_TOOMANY 0x02
#define DUK_DBG_ERR_NOTFOUND 0x03
#define DUK_DBG_ERR_APPLICATION 0x04
/* Commands and notifys initiated by Duktape. */
#define DUK_DBG_CMD_STATUS 0x01
#define DUK_DBG_CMD_PRINT 0x02
#define DUK_DBG_CMD_ALERT 0x03
#define DUK_DBG_CMD_LOG 0x04
#define DUK_DBG_CMD_THROW 0x05
#define DUK_DBG_CMD_DETACHING 0x06
#define DUK_DBG_CMD_APPNOTIFY 0x07
/* Commands initiated by debug client. */
#define DUK_DBG_CMD_BASICINFO 0x10
#define DUK_DBG_CMD_TRIGGERSTATUS 0x11
#define DUK_DBG_CMD_PAUSE 0x12
#define DUK_DBG_CMD_RESUME 0x13
#define DUK_DBG_CMD_STEPINTO 0x14
#define DUK_DBG_CMD_STEPOVER 0x15
#define DUK_DBG_CMD_STEPOUT 0x16
#define DUK_DBG_CMD_LISTBREAK 0x17
#define DUK_DBG_CMD_ADDBREAK 0x18
#define DUK_DBG_CMD_DELBREAK 0x19
#define DUK_DBG_CMD_GETVAR 0x1a
#define DUK_DBG_CMD_PUTVAR 0x1b
#define DUK_DBG_CMD_GETCALLSTACK 0x1c
#define DUK_DBG_CMD_GETLOCALS 0x1d
#define DUK_DBG_CMD_EVAL 0x1e
#define DUK_DBG_CMD_DETACH 0x1f
#define DUK_DBG_CMD_DUMPHEAP 0x20
#define DUK_DBG_CMD_GETBYTECODE 0x21
#define DUK_DBG_CMD_APPREQUEST 0x22
#define DUK_DBG_CMD_GETHEAPOBJINFO 0x23
#define DUK_DBG_CMD_GETOBJPROPDESC 0x24
#define DUK_DBG_CMD_GETOBJPROPDESCRANGE 0x25
/* The low 8 bits map directly to duk_hobject.h DUK_PROPDESC_FLAG_xxx.
* The remaining flags are specific to the debugger.
*/
#define DUK_DBG_PROPFLAG_INTERNAL (1 << 8)
#if defined(DUK_USE_DEBUGGER_SUPPORT)
DUK_INTERNAL_DECL void duk_debug_do_detach(duk_heap *heap);
DUK_INTERNAL_DECL duk_bool_t duk_debug_read_peek(duk_hthread *thr);
DUK_INTERNAL_DECL void duk_debug_write_flush(duk_hthread *thr);
DUK_INTERNAL_DECL void duk_debug_skip_bytes(duk_hthread *thr, duk_size_t length);
DUK_INTERNAL_DECL void duk_debug_skip_byte(duk_hthread *thr);
DUK_INTERNAL_DECL void duk_debug_read_bytes(duk_hthread *thr, duk_uint8_t *data, duk_size_t length);
DUK_INTERNAL_DECL duk_uint8_t duk_debug_read_byte(duk_hthread *thr);
DUK_INTERNAL_DECL duk_int32_t duk_debug_read_int(duk_hthread *thr);
DUK_INTERNAL_DECL duk_hstring *duk_debug_read_hstring(duk_hthread *thr);
/* XXX: exposed duk_debug_read_pointer */
/* XXX: exposed duk_debug_read_buffer */
/* XXX: exposed duk_debug_read_hbuffer */
#if 0
DUK_INTERNAL_DECL duk_heaphdr *duk_debug_read_heapptr(duk_hthread *thr);
#endif
#if defined(DUK_USE_DEBUGGER_INSPECT)
DUK_INTERNAL_DECL duk_heaphdr *duk_debug_read_any_ptr(duk_hthread *thr);
#endif
DUK_INTERNAL_DECL duk_tval *duk_debug_read_tval(duk_hthread *thr);
DUK_INTERNAL_DECL void duk_debug_write_bytes(duk_hthread *thr, const duk_uint8_t *data, duk_size_t length);
DUK_INTERNAL_DECL void duk_debug_write_byte(duk_hthread *thr, duk_uint8_t x);
DUK_INTERNAL_DECL void duk_debug_write_unused(duk_hthread *thr);
DUK_INTERNAL_DECL void duk_debug_write_undefined(duk_hthread *thr);
#if defined(DUK_USE_DEBUGGER_INSPECT)
DUK_INTERNAL_DECL void duk_debug_write_null(duk_hthread *thr);
#endif
DUK_INTERNAL_DECL void duk_debug_write_boolean(duk_hthread *thr, duk_uint_t val);
DUK_INTERNAL_DECL void duk_debug_write_int(duk_hthread *thr, duk_int32_t x);
DUK_INTERNAL_DECL void duk_debug_write_uint(duk_hthread *thr, duk_uint32_t x);
DUK_INTERNAL_DECL void duk_debug_write_string(duk_hthread *thr, const char *data, duk_size_t length);
DUK_INTERNAL_DECL void duk_debug_write_cstring(duk_hthread *thr, const char *data);
DUK_INTERNAL_DECL void duk_debug_write_hstring(duk_hthread *thr, duk_hstring *h);
DUK_INTERNAL_DECL void duk_debug_write_buffer(duk_hthread *thr, const char *data, duk_size_t length);
DUK_INTERNAL_DECL void duk_debug_write_hbuffer(duk_hthread *thr, duk_hbuffer *h);
DUK_INTERNAL_DECL void duk_debug_write_pointer(duk_hthread *thr, void *ptr);
#if defined(DUK_USE_DEBUGGER_DUMPHEAP) || defined(DUK_USE_DEBUGGER_INSPECT)
DUK_INTERNAL_DECL void duk_debug_write_heapptr(duk_hthread *thr, duk_heaphdr *h);
#endif
DUK_INTERNAL_DECL void duk_debug_write_hobject(duk_hthread *thr, duk_hobject *obj);
DUK_INTERNAL_DECL void duk_debug_write_tval(duk_hthread *thr, duk_tval *tv);
#if 0 /* unused */
DUK_INTERNAL_DECL void duk_debug_write_request(duk_hthread *thr, duk_small_uint_t command);
#endif
DUK_INTERNAL_DECL void duk_debug_write_reply(duk_hthread *thr);
DUK_INTERNAL_DECL void duk_debug_write_error_eom(duk_hthread *thr, duk_small_uint_t err_code, const char *msg);
DUK_INTERNAL_DECL void duk_debug_write_notify(duk_hthread *thr, duk_small_uint_t command);
DUK_INTERNAL_DECL void duk_debug_write_eom(duk_hthread *thr);
DUK_INTERNAL_DECL duk_uint_fast32_t duk_debug_curr_line(duk_hthread *thr);
DUK_INTERNAL_DECL void duk_debug_send_status(duk_hthread *thr);
#if defined(DUK_USE_DEBUGGER_THROW_NOTIFY)
DUK_INTERNAL_DECL void duk_debug_send_throw(duk_hthread *thr, duk_bool_t fatal);
#endif
DUK_INTERNAL_DECL void duk_debug_halt_execution(duk_hthread *thr, duk_bool_t use_prev_pc);
DUK_INTERNAL_DECL duk_bool_t duk_debug_process_messages(duk_hthread *thr, duk_bool_t no_block);
DUK_INTERNAL_DECL duk_small_int_t duk_debug_add_breakpoint(duk_hthread *thr, duk_hstring *filename, duk_uint32_t line);
DUK_INTERNAL_DECL duk_bool_t duk_debug_remove_breakpoint(duk_hthread *thr, duk_small_uint_t breakpoint_index);
#endif
#endif /* DUK_DEBUGGER_H_INCLUDED */
#line 1 "duk_debug.h"
/*
* Debugging macros, DUK_DPRINT() and its variants in particular.
*
* DUK_DPRINT() allows formatted debug prints, and supports standard
* and Duktape specific formatters. See duk_debug_vsnprintf.c for details.
*
* DUK_D(x), DUK_DD(x), and DUK_DDD(x) are used together with log macros
* for technical reasons. They are concretely used to hide 'x' from the
* compiler when the corresponding log level is disabled. This allows
* clean builds on non-C99 compilers, at the cost of more verbose code.
* Examples:
*
* DUK_D(DUK_DPRINT("foo"));
* DUK_DD(DUK_DDPRINT("foo"));
* DUK_DDD(DUK_DDDPRINT("foo"));
*
* This approach is preferable to the old "double parentheses" hack because
* double parentheses make the C99 solution worse: __FILE__ and __LINE__ can
* no longer be added transparently without going through globals, which
* works poorly with threading.
*/
#ifndef DUK_DEBUG_H_INCLUDED
#define DUK_DEBUG_H_INCLUDED
#ifdef DUK_USE_DEBUG
#if defined(DUK_USE_DPRINT)
#define DUK_D(x) x
#else
#define DUK_D(x) do { } while (0) /* omit */
#endif
#if defined(DUK_USE_DDPRINT)
#define DUK_DD(x) x
#else
#define DUK_DD(x) do { } while (0) /* omit */
#endif
#if defined(DUK_USE_DDDPRINT)
#define DUK_DDD(x) x
#else
#define DUK_DDD(x) do { } while (0) /* omit */
#endif
/*
* Exposed debug macros: debugging enabled
*/
#define DUK_LEVEL_DEBUG 1
#define DUK_LEVEL_DDEBUG 2
#define DUK_LEVEL_DDDEBUG 3
#ifdef DUK_USE_VARIADIC_MACROS
/* Note: combining __FILE__, __LINE__, and __func__ into fmt would be
* possible compile time, but waste some space with shared function names.
*/
#define DUK__DEBUG_LOG(lev,...) duk_debug_log((duk_small_int_t) (lev), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO, DUK_FUNC_MACRO, __VA_ARGS__);
#define DUK_DPRINT(...) DUK__DEBUG_LOG(DUK_LEVEL_DEBUG, __VA_ARGS__)
#ifdef DUK_USE_DDPRINT
#define DUK_DDPRINT(...) DUK__DEBUG_LOG(DUK_LEVEL_DDEBUG, __VA_ARGS__)
#else
#define DUK_DDPRINT(...)
#endif
#ifdef DUK_USE_DDDPRINT
#define DUK_DDDPRINT(...) DUK__DEBUG_LOG(DUK_LEVEL_DDDEBUG, __VA_ARGS__)
#else
#define DUK_DDDPRINT(...)
#endif
#else /* DUK_USE_VARIADIC_MACROS */
#define DUK__DEBUG_STASH(lev) \
(void) DUK_SNPRINTF(duk_debug_file_stash, DUK_DEBUG_STASH_SIZE, "%s", (const char *) DUK_FILE_MACRO), \
duk_debug_file_stash[DUK_DEBUG_STASH_SIZE - 1] = (char) 0; \
(void) DUK_SNPRINTF(duk_debug_line_stash, DUK_DEBUG_STASH_SIZE, "%ld", (long) DUK_LINE_MACRO), \
duk_debug_line_stash[DUK_DEBUG_STASH_SIZE - 1] = (char) 0; \
(void) DUK_SNPRINTF(duk_debug_func_stash, DUK_DEBUG_STASH_SIZE, "%s", (const char *) DUK_FUNC_MACRO), \
duk_debug_func_stash[DUK_DEBUG_STASH_SIZE - 1] = (char) 0; \
(void) (duk_debug_level_stash = (lev))
/* Without variadic macros resort to comma expression trickery to handle debug
* prints. This generates a lot of harmless warnings. These hacks are not
* needed normally because DUK_D() and friends will hide the entire debug log
* statement from the compiler.
*/
#ifdef DUK_USE_DPRINT
#define DUK_DPRINT DUK__DEBUG_STASH(DUK_LEVEL_DEBUG), (void) duk_debug_log /* args go here in parens */
#else
#define DUK_DPRINT 0 && /* args go here as a comma expression in parens */
#endif
#ifdef DUK_USE_DDPRINT
#define DUK_DDPRINT DUK__DEBUG_STASH(DUK_LEVEL_DDEBUG), (void) duk_debug_log /* args go here in parens */
#else
#define DUK_DDPRINT 0 && /* args */
#endif
#ifdef DUK_USE_DDDPRINT
#define DUK_DDDPRINT DUK__DEBUG_STASH(DUK_LEVEL_DDDEBUG), (void) duk_debug_log /* args go here in parens */
#else
#define DUK_DDDPRINT 0 && /* args */
#endif
#endif /* DUK_USE_VARIADIC_MACROS */
#else /* DUK_USE_DEBUG */
/*
* Exposed debug macros: debugging disabled
*/
#define DUK_D(x) do { } while (0) /* omit */
#define DUK_DD(x) do { } while (0) /* omit */
#define DUK_DDD(x) do { } while (0) /* omit */
#ifdef DUK_USE_VARIADIC_MACROS
#define DUK_DPRINT(...)
#define DUK_DDPRINT(...)
#define DUK_DDDPRINT(...)
#else /* DUK_USE_VARIADIC_MACROS */
#define DUK_DPRINT 0 && /* args go here as a comma expression in parens */
#define DUK_DDPRINT 0 && /* args */
#define DUK_DDDPRINT 0 && /* args */
#endif /* DUK_USE_VARIADIC_MACROS */
#endif /* DUK_USE_DEBUG */
/*
* Structs
*/
#ifdef DUK_USE_DEBUG
struct duk_fixedbuffer {
duk_uint8_t *buffer;
duk_size_t length;
duk_size_t offset;
duk_bool_t truncated;
};
#endif
/*
* Prototypes
*/
#ifdef DUK_USE_DEBUG
DUK_INTERNAL_DECL duk_int_t duk_debug_vsnprintf(char *str, duk_size_t size, const char *format, va_list ap);
#if 0 /*unused*/
DUK_INTERNAL_DECL duk_int_t duk_debug_snprintf(char *str, duk_size_t size, const char *format, ...);
#endif
DUK_INTERNAL_DECL void duk_debug_format_funcptr(char *buf, duk_size_t buf_size, duk_uint8_t *fptr, duk_size_t fptr_size);
#ifdef DUK_USE_VARIADIC_MACROS
DUK_INTERNAL_DECL void duk_debug_log(duk_small_int_t level, const char *file, duk_int_t line, const char *func, const char *fmt, ...);
#else /* DUK_USE_VARIADIC_MACROS */
/* parameter passing, not thread safe */
#define DUK_DEBUG_STASH_SIZE 128
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL char duk_debug_file_stash[DUK_DEBUG_STASH_SIZE];
DUK_INTERNAL_DECL char duk_debug_line_stash[DUK_DEBUG_STASH_SIZE];
DUK_INTERNAL_DECL char duk_debug_func_stash[DUK_DEBUG_STASH_SIZE];
DUK_INTERNAL_DECL duk_small_int_t duk_debug_level_stash;
#endif
DUK_INTERNAL_DECL void duk_debug_log(const char *fmt, ...);
#endif /* DUK_USE_VARIADIC_MACROS */
DUK_INTERNAL_DECL void duk_fb_put_bytes(duk_fixedbuffer *fb, const duk_uint8_t *buffer, duk_size_t length);
DUK_INTERNAL_DECL void duk_fb_put_byte(duk_fixedbuffer *fb, duk_uint8_t x);
DUK_INTERNAL_DECL void duk_fb_put_cstring(duk_fixedbuffer *fb, const char *x);
DUK_INTERNAL_DECL void duk_fb_sprintf(duk_fixedbuffer *fb, const char *fmt, ...);
DUK_INTERNAL_DECL void duk_fb_put_funcptr(duk_fixedbuffer *fb, duk_uint8_t *fptr, duk_size_t fptr_size);
DUK_INTERNAL_DECL duk_bool_t duk_fb_is_full(duk_fixedbuffer *fb);
#endif /* DUK_USE_DEBUG */
#endif /* DUK_DEBUG_H_INCLUDED */
#line 1 "duk_error.h"
/*
* Error handling macros, assertion macro, error codes.
*
* There are three level of 'errors':
*
* 1. Ordinary errors, relative to a thread, cause a longjmp, catchable.
* 2. Fatal errors, relative to a heap, cause fatal handler to be called.
* 3. Panic errors, unrelated to a heap and cause a process exit.
*
* Panics are used by the default fatal error handler and by debug code
* such as assertions. By providing a proper fatal error handler, user
* code can avoid panics in non-debug builds.
*/
#ifndef DUK_ERROR_H_INCLUDED
#define DUK_ERROR_H_INCLUDED
/*
* Error codes: defined in duktape.h
*
* Error codes are used as a shorthand to throw exceptions from inside
* the implementation. The appropriate Ecmascript object is constructed
* based on the code. Ecmascript code throws objects directly. The error
* codes are defined in the public API header because they are also used
* by calling code.
*/
/*
* Normal error
*
* Normal error is thrown with a longjmp() through the current setjmp()
* catchpoint record in the duk_heap. The 'curr_thread' of the duk_heap
* identifies the throwing thread.
*
* Error formatting is usually unnecessary. The error macros provide a
* zero argument version (no formatting) and separate macros for small
* argument counts. Variadic macros are not used to avoid portability
* issues and avoid the need for stash-based workarounds when they're not
* available. Vararg calls are avoided for non-formatted error calls
* because vararg call sites are larger than normal, and there are a lot
* of call sites with no formatting.
*
* Note that special formatting provided by debug macros is NOT available.
*
* The _RAW variants allow the caller to specify file and line. This makes
* it easier to write checked calls which want to use the call site of the
* checked function, not the error macro call inside the checked function.
*/
#if defined(DUK_USE_VERBOSE_ERRORS)
/* Because there are quite many call sites, pack error code (require at most
* 8-bit) into a single argument.
*/
#define DUK_ERROR(thr,err,msg) do { \
duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) DUK_LINE_MACRO; \
DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \
duk_err_handle_error((thr), DUK_FILE_MACRO, (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (msg)); \
} while (0)
#define DUK_ERROR_RAW(thr,file,line,err,msg) do { \
duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) (line); \
DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \
duk_err_handle_error((thr), (file), (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (msg)); \
} while (0)
#define DUK_ERROR_FMT1(thr,err,fmt,arg1) do { \
duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) DUK_LINE_MACRO; \
DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \
duk_err_handle_error_fmt((thr), DUK_FILE_MACRO, (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (fmt), (arg1)); \
} while (0)
#define DUK_ERROR_RAW_FMT1(thr,file,line,err,fmt,arg1) do { \
duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) (line); \
DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \
duk_err_handle_error_fmt((thr), (file), (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (fmt), (arg1)); \
} while (0)
#define DUK_ERROR_FMT2(thr,err,fmt,arg1,arg2) do { \
duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) DUK_LINE_MACRO; \
DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \
duk_err_handle_error_fmt((thr), DUK_FILE_MACRO, (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (fmt), (arg1), (arg2)); \
} while (0)
#define DUK_ERROR_RAW_FMT2(thr,file,line,err,fmt,arg1,arg2) do { \
duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) (line); \
DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \
duk_err_handle_error_fmt((thr), (file), (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (fmt), (arg1), (arg2)); \
} while (0)
#define DUK_ERROR_FMT3(thr,err,fmt,arg1,arg2,arg3) do { \
duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) DUK_LINE_MACRO; \
DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \
duk_err_handle_error_fmt((thr), DUK_FILE_MACRO, (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (fmt), (arg1), (arg2), (arg3)); \
} while (0)
#define DUK_ERROR_RAW_FMT3(thr,file,line,err,fmt,arg1,arg2,arg3) do { \
duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) (line); \
DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \
duk_err_handle_error_fmt((thr), (file), (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (fmt), (arg1), (arg2), (arg3)); \
} while (0)
#define DUK_ERROR_FMT4(thr,err,fmt,arg1,arg2,arg3,arg4) do { \
duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) DUK_LINE_MACRO; \
DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \
duk_err_handle_error_fmt((thr), DUK_FILE_MACRO, (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (fmt), (arg1), (arg2), (arg3), (arg4)); \
} while (0)
#define DUK_ERROR_RAW_FMT4(thr,file,line,err,fmt,arg1,arg2,arg3,arg4) do { \
duk_errcode_t duk__err = (err); duk_int_t duk__line = (duk_int_t) (line); \
DUK_ASSERT(duk__err >= 0 && duk__err <= 0xff); DUK_ASSERT(duk__line >= 0 && duk__line <= 0x00ffffffL); \
duk_err_handle_error_fmt((thr), (file), (((duk_uint_t) duk__err) << 24) | ((duk_uint_t) duk__line), (fmt), (arg1), (arg2), (arg3), (arg4)); \
} while (0)
#else /* DUK_USE_VERBOSE_ERRORS */
#define DUK_ERROR(thr,err,msg) duk_err_handle_error((thr), (err))
#define DUK_ERROR_RAW(thr,file,line,err,msg) duk_err_handle_error((thr), (err))
#define DUK_ERROR_FMT1(thr,err,fmt,arg1) DUK_ERROR((thr),(err),(fmt))
#define DUK_ERROR_RAW_FMT1(thr,file,line,err,fmt,arg1) DUK_ERROR_RAW((thr),(file),(line),(err),(fmt))
#define DUK_ERROR_FMT2(thr,err,fmt,arg1,arg2) DUK_ERROR((thr),(err),(fmt))
#define DUK_ERROR_RAW_FMT2(thr,file,line,err,fmt,arg1,arg2) DUK_ERROR_RAW((thr),(file),(line),(err),(fmt))
#define DUK_ERROR_FMT3(thr,err,fmt,arg1,arg2,arg3) DUK_ERROR((thr),(err),(fmt))
#define DUK_ERROR_RAW_FMT3(thr,file,line,err,fmt,arg1,arg2,arg3) DUK_ERROR_RAW((thr),(file),(line),(err),(fmt))
#define DUK_ERROR_FMT4(thr,err,fmt,arg1,arg2,arg3,arg4) DUK_ERROR((thr),(err),(fmt))
#define DUK_ERROR_RAW_FMT4(thr,file,line,err,fmt,arg1,arg2,arg3,arg4) DUK_ERROR_RAW((thr),(file),(line),(err),(fmt))
#endif /* DUK_USE_VERBOSE_ERRORS */
/*
* Fatal error
*
* There are no fatal error macros at the moment. There are so few call
* sites that the fatal error handler is called directly.
*/
/*
* Panic error
*
* Panic errors are not relative to either a heap or a thread, and cause
* DUK_PANIC() macro to be invoked. Unless a user provides DUK_USE_PANIC_HANDLER,
* DUK_PANIC() calls a helper which prints out the error and causes a process
* exit.
*
* The user can override the macro to provide custom handling. A macro is
* used to allow the user to have inline panic handling if desired (without
* causing a potentially risky function call).
*
* Panics are only used in debug code such as assertions, and by the default
* fatal error handler.
*/
#if defined(DUK_USE_PANIC_HANDLER)
/* already defined, good */
#define DUK_PANIC(code,msg) DUK_USE_PANIC_HANDLER((code),(msg))
#else
#define DUK_PANIC(code,msg) duk_default_panic_handler((code),(msg))
#endif /* DUK_USE_PANIC_HANDLER */
/*
* Assert macro: failure causes panic.
*/
#if defined(DUK_USE_ASSERTIONS)
/* the message should be a compile time constant without formatting (less risk);
* we don't care about assertion text size because they're not used in production
* builds.
*/
#define DUK_ASSERT(x) do { \
if (!(x)) { \
DUK_PANIC(DUK_ERR_ASSERTION_ERROR, \
"assertion failed: " #x \
" (" DUK_FILE_MACRO ":" DUK_MACRO_STRINGIFY(DUK_LINE_MACRO) ")"); \
} \
} while (0)
/* Assertion compatible inside a comma expression, evaluates to void.
* Currently not compatible with DUK_USE_PANIC_HANDLER() which may have
* a statement block.
*/
#if defined(DUK_USE_PANIC_HANDLER)
/* XXX: resolve macro definition issue or call through a helper function? */
#define DUK_ASSERT_EXPR(x) ((void) 0)
#else
#define DUK_ASSERT_EXPR(x) \
((void) ((x) ? 0 : (DUK_PANIC(DUK_ERR_ASSERTION_ERROR, \
"assertion failed: " #x \
" (" DUK_FILE_MACRO ":" DUK_MACRO_STRINGIFY(DUK_LINE_MACRO) ")"), 0)))
#endif
#else /* DUK_USE_ASSERTIONS */
#define DUK_ASSERT(x) do { /* assertion omitted */ } while (0)
#define DUK_ASSERT_EXPR(x) ((void) 0)
#endif /* DUK_USE_ASSERTIONS */
/* this variant is used when an assert would generate a compile warning by
* being always true (e.g. >= 0 comparison for an unsigned value
*/
#define DUK_ASSERT_DISABLE(x) do { /* assertion disabled */ } while (0)
/*
* Assertion helpers
*/
#if defined(DUK_USE_ASSERTIONS) && defined(DUK_USE_REFERENCE_COUNTING)
#define DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR(h) do { \
DUK_ASSERT((h) == NULL || DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) (h)) > 0); \
} while (0)
#define DUK_ASSERT_REFCOUNT_NONZERO_TVAL(tv) do { \
if ((tv) != NULL && DUK_TVAL_IS_HEAP_ALLOCATED((tv))) { \
DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(DUK_TVAL_GET_HEAPHDR((tv))) > 0); \
} \
} while (0)
#else
#define DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR(h) /* no refcount check */
#define DUK_ASSERT_REFCOUNT_NONZERO_TVAL(tv) /* no refcount check */
#endif
#define DUK_ASSERT_TOP(ctx,n) DUK_ASSERT((duk_idx_t) duk_get_top((ctx)) == (duk_idx_t) (n))
#if defined(DUK_USE_ASSERTIONS) && defined(DUK_USE_PACKED_TVAL)
#define DUK_ASSERT_DOUBLE_IS_NORMALIZED(dval) do { \
duk_double_union duk__assert_tmp_du; \
duk__assert_tmp_du.d = (dval); \
DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&duk__assert_tmp_du)); \
} while (0)
#else
#define DUK_ASSERT_DOUBLE_IS_NORMALIZED(dval) /* nop */
#endif
/*
* Helper for valstack space
*
* Caller of DUK_ASSERT_VALSTACK_SPACE() estimates the number of free stack entries
* required for its own use, and any child calls which are not (a) Duktape API calls
* or (b) Duktape calls which involve extending the valstack (e.g. getter call).
*/
#define DUK_VALSTACK_ASSERT_EXTRA 5 /* this is added to checks to allow for Duktape
* API calls in addition to function's own use
*/
#if defined(DUK_USE_ASSERTIONS)
#define DUK_ASSERT_VALSTACK_SPACE(thr,n) do { \
DUK_ASSERT((thr) != NULL); \
DUK_ASSERT((thr)->valstack_end - (thr)->valstack_top >= (n) + DUK_VALSTACK_ASSERT_EXTRA); \
} while (0)
#else
#define DUK_ASSERT_VALSTACK_SPACE(thr,n) /* no valstack space check */
#endif
/*
* Error throwing helpers
*
* The goal is to provide verbose and configurable error messages. Call
* sites should be clean in source code and compile to a small footprint.
* Small footprint is also useful for performance because small cold paths
* reduce code cache pressure. Adding macros here only makes sense if there
* are enough call sites to get concrete benefits.
*/
#if defined(DUK_USE_VERBOSE_ERRORS)
/* Verbose errors with key/value summaries (non-paranoid) or without key/value
* summaries (paranoid, for some security sensitive environments), the paranoid
* vs. non-paranoid distinction affects only a few specific errors.
*/
#if defined(DUK_USE_PARANOID_ERRORS)
#define DUK_ERROR_REQUIRE_TYPE_INDEX(thr,index,expectname,lowmemstr) do { \
duk_err_require_type_index((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO, (index), (expectname)); \
} while (0)
#else /* DUK_USE_PARANOID_ERRORS */
#define DUK_ERROR_REQUIRE_TYPE_INDEX(thr,index,expectname,lowmemstr) do { \
duk_err_require_type_index((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO, (index), (expectname)); \
} while (0)
#endif /* DUK_USE_PARANOID_ERRORS */
#define DUK_ERROR_UNIMPLEMENTED(thr,msg) do { \
DUK_ERROR((thr), DUK_ERR_UNIMPLEMENTED_ERROR, (msg)); \
} while (0)
#define DUK_ERROR_UNIMPLEMENTED_DEFMSG(thr) do { \
duk_err_unimplemented_defmsg((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO); \
} while (0)
#define DUK_ERROR_UNSUPPORTED(thr,msg) do { \
DUK_ERROR((thr), DUK_ERR_UNSUPPORTED_ERROR, (msg)); \
} while (0)
#if !defined(DUK_USE_BYTECODE_DUMP_SUPPORT)
#define DUK_ERROR_UNSUPPORTED_DEFMSG(thr) do { \
duk_err_unsupported_defmsg((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO); \
} while (0)
#endif
#define DUK_ERROR_INTERNAL(thr,msg) do { \
duk_err_internal((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO, (msg)); \
} while (0)
#define DUK_ERROR_INTERNAL_DEFMSG(thr) do { \
duk_err_internal_defmsg((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO); \
} while (0)
#define DUK_ERROR_ALLOC(thr,msg) do { \
duk_err_alloc((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO, (msg)); \
} while (0)
#define DUK_ERROR_ALLOC_DEFMSG(thr) do { \
DUK_ERROR_ALLOC((thr), DUK_STR_ALLOC_FAILED); \
} while (0)
/* DUK_ERR_ASSERTION_ERROR: no macros needed */
#define DUK_ERROR_API_INDEX(thr,index) do { \
duk_err_api_index((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO, (index)); \
} while (0)
#define DUK_ERROR_API(thr,msg) do { \
duk_err_api((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO, (msg)); \
} while (0)
/* DUK_ERR_UNCAUGHT_ERROR: no macros needed */
/* DUK_ERR_ERROR: no macros needed */
/* DUK_ERR_EVAL: no macros needed */
#define DUK_ERROR_RANGE(thr,msg) do { \
duk_err_range((thr), DUK_FILE_MACRO, (duk_int_t) DUK_LINE_MACRO, (msg)); \
} while (0)
/* DUK_ERR_REFERENCE_ERROR: no macros needed */
#define DUK_ERROR_SYNTAX(thr,msg) do { \
DUK_ERROR((thr), DUK_ERR_SYNTAX_ERROR, (msg)); \
} while (0)
#define DUK_ERROR_TYPE(thr,msg) do { \
DUK_ERROR((thr), DUK_ERR_TYPE_ERROR, (msg)); \
} while (0)
/* DUK_ERR_URI_ERROR: no macros needed */
#else /* DUK_USE_VERBOSE_ERRORS */
/* Non-verbose errors for low memory targets: no file, line, or message. */
#define DUK_ERROR_REQUIRE_TYPE_INDEX(thr,index,expectname,lowmemstr) do { \
duk_err_type((thr)); \
} while (0)
#define DUK_ERROR_UNIMPLEMENTED(thr,msg) do { \
duk_err_unimplemented((thr)); \
} while (0)
#define DUK_ERROR_UNIMPLEMENTED_DEFMSG(thr) do { \
duk_err_unimplemented((thr)); \
} while (0)
#define DUK_ERROR_UNSUPPORTED(thr,msg) do { \
duk_err_unsupported((thr)); \
} while (0)
#define DUK_ERROR_UNSUPPORTED_DEFMSG(thr) do { \
duk_err_unsupported((thr)); \
} while (0)
#define DUK_ERROR_INTERNAL(thr,msg) do { \
duk_err_internal((thr)); \
} while (0)
#define DUK_ERROR_INTERNAL_DEFMSG(thr) do { \
duk_err_internal((thr)); \
} while (0)
#define DUK_ERROR_ALLOC(thr,msg) do { \
duk_err_alloc((thr)); \
} while (0)
#define DUK_ERROR_ALLOC_DEFMSG(thr) do { \
duk_err_alloc((thr)); \
} while (0)
#define DUK_ERROR_API_INDEX(thr,index) do { \
duk_err_api((thr)); \
} while (0)
#define DUK_ERROR_API(thr,msg) do { \
duk_err_api((thr)); \
} while (0)
#define DUK_ERROR_RANGE(thr,msg) do { \
duk_err_range((thr)); \
} while (0)
#define DUK_ERROR_SYNTAX(thr,msg) do { \
duk_err_syntax((thr)); \
} while (0)
#define DUK_ERROR_TYPE(thr,msg) do { \
duk_err_type((thr)); \
} while (0)
#endif /* DUK_USE_VERBOSE_ERRORS */
/*
* Prototypes
*/
#if defined(DUK_USE_VERBOSE_ERRORS)
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_handle_error(duk_hthread *thr, const char *filename, duk_uint_t line_and_code, const char *msg));
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_handle_error_fmt(duk_hthread *thr, const char *filename, duk_uint_t line_and_code, const char *fmt, ...));
#else /* DUK_USE_VERBOSE_ERRORS */
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_handle_error(duk_hthread *thr, duk_errcode_t code));
#endif /* DUK_USE_VERBOSE_ERRORS */
#if defined(DUK_USE_VERBOSE_ERRORS)
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_create_and_throw(duk_hthread *thr, duk_errcode_t code, const char *msg, const char *filename, duk_int_t line));
#else
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_create_and_throw(duk_hthread *thr, duk_errcode_t code));
#endif
DUK_NORETURN(DUK_INTERNAL_DECL void duk_error_throw_from_negative_rc(duk_hthread *thr, duk_ret_t rc));
#if defined(DUK_USE_AUGMENT_ERROR_CREATE)
DUK_INTERNAL_DECL void duk_err_augment_error_create(duk_hthread *thr, duk_hthread *thr_callstack, const char *filename, duk_int_t line, duk_bool_t noblame_fileline);
#endif
#if defined(DUK_USE_AUGMENT_ERROR_THROW)
DUK_INTERNAL_DECL void duk_err_augment_error_throw(duk_hthread *thr);
#endif
#if defined(DUK_USE_VERBOSE_ERRORS)
#if defined(DUK_USE_PARANOID_ERRORS)
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_require_type_index(duk_hthread *thr, const char *filename, duk_int_t linenumber, duk_idx_t index, const char *expect_name));
#else
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_require_type_index(duk_hthread *thr, const char *filename, duk_int_t linenumber, duk_idx_t index, const char *expect_name));
#endif
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_api_index(duk_hthread *thr, const char *filename, duk_int_t linenumber, duk_idx_t index));
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_api(duk_hthread *thr, const char *filename, duk_int_t linenumber, const char *message));
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_range(duk_hthread *thr, const char *filename, duk_int_t linenumber, const char *message));
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_unimplemented_defmsg(duk_hthread *thr, const char *filename, duk_int_t linenumber));
#if !defined(DUK_USE_BYTECODE_DUMP_SUPPORT)
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_unsupported_defmsg(duk_hthread *thr, const char *filename, duk_int_t linenumber));
#endif
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_internal_defmsg(duk_hthread *thr, const char *filename, duk_int_t linenumber));
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_internal(duk_hthread *thr, const char *filename, duk_int_t linenumber, const char *message));
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_alloc(duk_hthread *thr, const char *filename, duk_int_t linenumber, const char *message));
#else /* DUK_VERBOSE_ERRORS */
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_range(duk_hthread *thr));
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_syntax(duk_hthread *thr));
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_type(duk_hthread *thr));
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_api(duk_hthread *thr));
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_unimplemented(duk_hthread *thr));
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_unsupported(duk_hthread *thr));
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_internal(duk_hthread *thr));
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_alloc(duk_hthread *thr));
#endif /* DUK_VERBOSE_ERRORS */
DUK_NORETURN(DUK_INTERNAL_DECL void duk_err_longjmp(duk_hthread *thr));
DUK_NORETURN(DUK_INTERNAL_DECL void duk_default_fatal_handler(duk_context *ctx, duk_errcode_t code, const char *msg));
#if !defined(DUK_USE_PANIC_HANDLER)
DUK_NORETURN(DUK_INTERNAL_DECL void duk_default_panic_handler(duk_errcode_t code, const char *msg));
#endif
DUK_INTERNAL_DECL void duk_err_setup_heap_ljstate(duk_hthread *thr, duk_small_int_t lj_type);
DUK_INTERNAL_DECL duk_hobject *duk_error_prototype_from_code(duk_hthread *thr, duk_errcode_t err_code);
#endif /* DUK_ERROR_H_INCLUDED */
#line 1 "duk_unicode.h"
/*
* Unicode helpers
*/
#ifndef DUK_UNICODE_H_INCLUDED
#define DUK_UNICODE_H_INCLUDED
/*
* UTF-8 / XUTF-8 / CESU-8 constants
*/
#define DUK_UNICODE_MAX_XUTF8_LENGTH 7 /* up to 36 bit codepoints */
#define DUK_UNICODE_MAX_XUTF8_BMP_LENGTH 3 /* all codepoints up to U+FFFF */
#define DUK_UNICODE_MAX_CESU8_LENGTH 6 /* all codepoints up to U+10FFFF */
#define DUK_UNICODE_MAX_CESU8_BMP_LENGTH 3 /* all codepoints up to U+FFFF */
/*
* Useful Unicode codepoints
*
* Integer constants must be signed to avoid unexpected coercions
* in comparisons.
*/
#define DUK_UNICODE_CP_ZWNJ 0x200cL /* zero-width non-joiner */
#define DUK_UNICODE_CP_ZWJ 0x200dL /* zero-width joiner */
#define DUK_UNICODE_CP_REPLACEMENT_CHARACTER 0xfffdL /* http://en.wikipedia.org/wiki/Replacement_character#Replacement_character */
/*
* ASCII character constants
*
* C character literals like 'x' have a platform specific value and do
* not match ASCII (UTF-8) values on e.g. EBCDIC platforms. So, use
* these (admittedly awkward) constants instead. These constants must
* also have signed values to avoid unexpected coercions in comparisons.
*
* http://en.wikipedia.org/wiki/ASCII
*/
#define DUK_ASC_NUL 0x00
#define DUK_ASC_SOH 0x01
#define DUK_ASC_STX 0x02
#define DUK_ASC_ETX 0x03
#define DUK_ASC_EOT 0x04
#define DUK_ASC_ENQ 0x05
#define DUK_ASC_ACK 0x06
#define DUK_ASC_BEL 0x07
#define DUK_ASC_BS 0x08
#define DUK_ASC_HT 0x09
#define DUK_ASC_LF 0x0a
#define DUK_ASC_VT 0x0b
#define DUK_ASC_FF 0x0c
#define DUK_ASC_CR 0x0d
#define DUK_ASC_SO 0x0e
#define DUK_ASC_SI 0x0f
#define DUK_ASC_DLE 0x10
#define DUK_ASC_DC1 0x11
#define DUK_ASC_DC2 0x12
#define DUK_ASC_DC3 0x13
#define DUK_ASC_DC4 0x14
#define DUK_ASC_NAK 0x15
#define DUK_ASC_SYN 0x16
#define DUK_ASC_ETB 0x17
#define DUK_ASC_CAN 0x18
#define DUK_ASC_EM 0x19
#define DUK_ASC_SUB 0x1a
#define DUK_ASC_ESC 0x1b
#define DUK_ASC_FS 0x1c
#define DUK_ASC_GS 0x1d
#define DUK_ASC_RS 0x1e
#define DUK_ASC_US 0x1f
#define DUK_ASC_SPACE 0x20
#define DUK_ASC_EXCLAMATION 0x21
#define DUK_ASC_DOUBLEQUOTE 0x22
#define DUK_ASC_HASH 0x23
#define DUK_ASC_DOLLAR 0x24
#define DUK_ASC_PERCENT 0x25
#define DUK_ASC_AMP 0x26
#define DUK_ASC_SINGLEQUOTE 0x27
#define DUK_ASC_LPAREN 0x28
#define DUK_ASC_RPAREN 0x29
#define DUK_ASC_STAR 0x2a
#define DUK_ASC_PLUS 0x2b
#define DUK_ASC_COMMA 0x2c
#define DUK_ASC_MINUS 0x2d
#define DUK_ASC_PERIOD 0x2e
#define DUK_ASC_SLASH 0x2f
#define DUK_ASC_0 0x30
#define DUK_ASC_1 0x31
#define DUK_ASC_2 0x32
#define DUK_ASC_3 0x33
#define DUK_ASC_4 0x34
#define DUK_ASC_5 0x35
#define DUK_ASC_6 0x36
#define DUK_ASC_7 0x37
#define DUK_ASC_8 0x38
#define DUK_ASC_9 0x39
#define DUK_ASC_COLON 0x3a
#define DUK_ASC_SEMICOLON 0x3b
#define DUK_ASC_LANGLE 0x3c
#define DUK_ASC_EQUALS 0x3d
#define DUK_ASC_RANGLE 0x3e
#define DUK_ASC_QUESTION 0x3f
#define DUK_ASC_ATSIGN 0x40
#define DUK_ASC_UC_A 0x41
#define DUK_ASC_UC_B 0x42
#define DUK_ASC_UC_C 0x43
#define DUK_ASC_UC_D 0x44
#define DUK_ASC_UC_E 0x45
#define DUK_ASC_UC_F 0x46
#define DUK_ASC_UC_G 0x47
#define DUK_ASC_UC_H 0x48
#define DUK_ASC_UC_I 0x49
#define DUK_ASC_UC_J 0x4a
#define DUK_ASC_UC_K 0x4b
#define DUK_ASC_UC_L 0x4c
#define DUK_ASC_UC_M 0x4d
#define DUK_ASC_UC_N 0x4e
#define DUK_ASC_UC_O 0x4f
#define DUK_ASC_UC_P 0x50
#define DUK_ASC_UC_Q 0x51
#define DUK_ASC_UC_R 0x52
#define DUK_ASC_UC_S 0x53
#define DUK_ASC_UC_T 0x54
#define DUK_ASC_UC_U 0x55
#define DUK_ASC_UC_V 0x56
#define DUK_ASC_UC_W 0x57
#define DUK_ASC_UC_X 0x58
#define DUK_ASC_UC_Y 0x59
#define DUK_ASC_UC_Z 0x5a
#define DUK_ASC_LBRACKET 0x5b
#define DUK_ASC_BACKSLASH 0x5c
#define DUK_ASC_RBRACKET 0x5d
#define DUK_ASC_CARET 0x5e
#define DUK_ASC_UNDERSCORE 0x5f
#define DUK_ASC_GRAVE 0x60
#define DUK_ASC_LC_A 0x61
#define DUK_ASC_LC_B 0x62
#define DUK_ASC_LC_C 0x63
#define DUK_ASC_LC_D 0x64
#define DUK_ASC_LC_E 0x65
#define DUK_ASC_LC_F 0x66
#define DUK_ASC_LC_G 0x67
#define DUK_ASC_LC_H 0x68
#define DUK_ASC_LC_I 0x69
#define DUK_ASC_LC_J 0x6a
#define DUK_ASC_LC_K 0x6b
#define DUK_ASC_LC_L 0x6c
#define DUK_ASC_LC_M 0x6d
#define DUK_ASC_LC_N 0x6e
#define DUK_ASC_LC_O 0x6f
#define DUK_ASC_LC_P 0x70
#define DUK_ASC_LC_Q 0x71
#define DUK_ASC_LC_R 0x72
#define DUK_ASC_LC_S 0x73
#define DUK_ASC_LC_T 0x74
#define DUK_ASC_LC_U 0x75
#define DUK_ASC_LC_V 0x76
#define DUK_ASC_LC_W 0x77
#define DUK_ASC_LC_X 0x78
#define DUK_ASC_LC_Y 0x79
#define DUK_ASC_LC_Z 0x7a
#define DUK_ASC_LCURLY 0x7b
#define DUK_ASC_PIPE 0x7c
#define DUK_ASC_RCURLY 0x7d
#define DUK_ASC_TILDE 0x7e
#define DUK_ASC_DEL 0x7f
/*
* Unicode tables
*/
#ifdef DUK_USE_SOURCE_NONBMP
/*
* Automatically generated by extract_chars.py, do not edit!
*/
extern const duk_uint8_t duk_unicode_ids_noa[791];
#else
/*
* Automatically generated by extract_chars.py, do not edit!
*/
extern const duk_uint8_t duk_unicode_ids_noabmp[611];
#endif
#ifdef DUK_USE_SOURCE_NONBMP
/*
* Automatically generated by extract_chars.py, do not edit!
*/
extern const duk_uint8_t duk_unicode_ids_m_let_noa[42];
#else
/*
* Automatically generated by extract_chars.py, do not edit!
*/
extern const duk_uint8_t duk_unicode_ids_m_let_noabmp[24];
#endif
#ifdef DUK_USE_SOURCE_NONBMP
/*
* Automatically generated by extract_chars.py, do not edit!
*/
extern const duk_uint8_t duk_unicode_idp_m_ids_noa[397];
#else
/*
* Automatically generated by extract_chars.py, do not edit!
*/
extern const duk_uint8_t duk_unicode_idp_m_ids_noabmp[348];
#endif
/*
* Automatically generated by extract_caseconv.py, do not edit!
*/
extern const duk_uint8_t duk_unicode_caseconv_uc[1288];
extern const duk_uint8_t duk_unicode_caseconv_lc[616];
#if defined(DUK_USE_REGEXP_CANON_WORKAROUND)
/*
* Automatically generated by extract_caseconv.py, do not edit!
*/
extern const duk_uint16_t duk_unicode_re_canon_lookup[65536];
#endif
/*
* Extern
*/
/* duk_unicode_support.c */
#if !defined(DUK_SINGLE_FILE)
DUK_INTERNAL_DECL const duk_uint8_t duk_unicode_xutf8_markers[7];
DUK_INTERNAL_DECL const duk_uint16_t duk_unicode_re_ranges_digit[2];
DUK_INTERNAL_DECL const duk_uint16_t duk_unicode_re_ranges_white[22];
DUK_INTERNAL_DECL const duk_uint16_t duk_unicode_re_ranges_wordchar[8];
DUK_INTERNAL_DECL const duk_uint16_t duk_unicode_re_ranges_not_digit[4];
DUK_INTERNAL_DECL const duk_uint16_t duk_unicode_re_ranges_not_white[24];
DUK_INTERNAL_DECL const duk_uint16_t duk_unicode_re_ranges_not_wordchar[10];
DUK_INTERNAL_DECL const duk_int8_t duk_is_idchar_tab[128];
#endif /* !DUK_SINGLE_FILE */
/*
* Prototypes
*/
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_get_xutf8_length(duk_ucodepoint_t cp);
#if defined(DUK_USE_ASSERTIONS)
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_get_cesu8_length(duk_ucodepoint_t cp);
#endif
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_encode_xutf8(duk_ucodepoint_t cp, duk_uint8_t *out);
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_encode_cesu8(duk_ucodepoint_t cp, duk_uint8_t *out);
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_decode_xutf8(duk_hthread *thr, const duk_uint8_t **ptr, const duk_uint8_t *ptr_start, const duk_uint8_t *ptr_end, duk_ucodepoint_t *out_cp);
DUK_INTERNAL_DECL duk_ucodepoint_t duk_unicode_decode_xutf8_checked(duk_hthread *thr, const duk_uint8_t **ptr, const duk_uint8_t *ptr_start, const duk_uint8_t *ptr_end);
DUK_INTERNAL_DECL duk_size_t duk_unicode_unvalidated_utf8_length(const duk_uint8_t *data, duk_size_t blen);
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_is_whitespace(duk_codepoint_t cp);
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_is_line_terminator(duk_codepoint_t cp);
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_is_identifier_start(duk_codepoint_t cp);
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_is_identifier_part(duk_codepoint_t cp);
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_is_letter(duk_codepoint_t cp);
DUK_INTERNAL_DECL void duk_unicode_case_convert_string(duk_hthread *thr, duk_bool_t uppercase);
DUK_INTERNAL_DECL duk_codepoint_t duk_unicode_re_canonicalize_char(duk_hthread *thr, duk_codepoint_t cp);
DUK_INTERNAL_DECL duk_small_int_t duk_unicode_re_is_wordchar(duk_codepoint_t cp);
#endif /* DUK_UNICODE_H_INCLUDED */
#line 1 "duk_json.h"
/*
* Defines for JSON, especially duk_bi_json.c.
*/
#ifndef DUK_JSON_H_INCLUDED
#define DUK_JSON_H_INCLUDED
/* Encoding/decoding flags */
#define DUK_JSON_FLAG_ASCII_ONLY (1 << 0) /* escape any non-ASCII characters */
#define DUK_JSON_FLAG_AVOID_KEY_QUOTES (1 << 1) /* avoid key quotes when key is an ASCII Identifier */
#define DUK_JSON_FLAG_EXT_CUSTOM (1 << 2) /* extended types: custom encoding */
#define DUK_JSON_FLAG_EXT_COMPATIBLE (1 << 3) /* extended types: compatible encoding */
/* How much stack to require on entry to object/array encode */
#define DUK_JSON_ENC_REQSTACK 32
/* How much stack to require on entry to object/array decode */
#define DUK_JSON_DEC_REQSTACK 32
/* How large a loop detection stack to use */
#define DUK_JSON_ENC_LOOPARRAY 64
/* Encoding state. Heap object references are all borrowed. */
typedef struct {
duk_hthread *thr;
duk_bufwriter_ctx bw; /* output bufwriter */
duk_hobject *h_replacer; /* replacer function */
duk_hstring *h_gap; /* gap (if empty string, NULL) */
duk_idx_t idx_proplist; /* explicit PropertyList */
duk_idx_t idx_loop; /* valstack index of loop detection object */
duk_small_uint_t flags;
duk_small_uint_t flag_ascii_only;
duk_small_uint_t flag_avoid_key_quotes;
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
duk_small_uint_t flag_ext_custom;
duk_small_uint_t flag_ext_compatible;
duk_small_uint_t flag_ext_custom_or_compatible;
#endif
duk_int_t recursion_depth;
duk_int_t recursion_limit;
duk_uint_t mask_for_undefined; /* type bit mask: types which certainly produce 'undefined' */
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
duk_small_uint_t stridx_custom_undefined;
duk_small_uint_t stridx_custom_nan;
duk_small_uint_t stridx_custom_neginf;
duk_small_uint_t stridx_custom_posinf;
duk_small_uint_t stridx_custom_function;
#endif
duk_hobject *visiting[DUK_JSON_ENC_LOOPARRAY]; /* indexed by recursion_depth */
} duk_json_enc_ctx;
typedef struct {
duk_hthread *thr;
const duk_uint8_t *p;
const duk_uint8_t *p_start;
const duk_uint8_t *p_end;
duk_idx_t idx_reviver;
duk_small_uint_t flags;
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
duk_small_uint_t flag_ext_custom;
duk_small_uint_t flag_ext_compatible;
duk_small_uint_t flag_ext_custom_or_compatible;
#endif
duk_int_t recursion_depth;
duk_int_t recursion_limit;
} duk_json_dec_ctx;
#endif /* DUK_JSON_H_INCLUDED */
#line 1 "duk_js.h"
/*
* Ecmascript execution, support primitives.
*/
#ifndef DUK_JS_H_INCLUDED
#define DUK_JS_H_INCLUDED
/* Flags for call handling. */
#define DUK_CALL_FLAG_IGNORE_RECLIMIT (1 << 0) /* duk_handle_call_xxx: call ignores C recursion limit (for errhandler calls) */
#define DUK_CALL_FLAG_CONSTRUCTOR_CALL (1 << 1) /* duk_handle_call_xxx: constructor call (i.e. called as 'new Foo()') */
#define DUK_CALL_FLAG_IS_RESUME (1 << 2) /* duk_handle_ecma_call_setup: setup for a resume() */
#define DUK_CALL_FLAG_IS_TAILCALL (1 << 3) /* duk_handle_ecma_call_setup: setup for a tail call */
#define DUK_CALL_FLAG_DIRECT_EVAL (1 << 4) /* call is a direct eval call */
/* Flags for duk_js_equals_helper(). */
#define DUK_EQUALS_FLAG_SAMEVALUE (1 << 0) /* use SameValue instead of non-strict equality */
#define DUK_EQUALS_FLAG_STRICT (1 << 1) /* use strict equality instead of non-strict equality */
/* Flags for duk_js_compare_helper(). */
#define DUK_COMPARE_FLAG_EVAL_LEFT_FIRST (1 << 0) /* eval left argument first */
#define DUK_COMPARE_FLAG_NEGATE (1 << 1) /* negate result */
/* conversions, coercions, comparison, etc */
DUK_INTERNAL_DECL duk_bool_t duk_js_toboolean(duk_tval *tv);
DUK_INTERNAL_DECL duk_double_t duk_js_tonumber(duk_hthread *thr, duk_tval *tv);
DUK_INTERNAL_DECL duk_double_t duk_js_tointeger_number(duk_double_t x);
DUK_INTERNAL_DECL duk_double_t duk_js_tointeger(duk_hthread *thr, duk_tval *tv);
DUK_INTERNAL_DECL duk_uint32_t duk_js_touint32(duk_hthread *thr, duk_tval *tv);
DUK_INTERNAL_DECL duk_int32_t duk_js_toint32(duk_hthread *thr, duk_tval *tv);
DUK_INTERNAL_DECL duk_uint16_t duk_js_touint16(duk_hthread *thr, duk_tval *tv);
DUK_INTERNAL_DECL duk_small_int_t duk_js_to_arrayindex_raw_string(const duk_uint8_t *str, duk_uint32_t blen, duk_uarridx_t *out_idx);
DUK_INTERNAL_DECL duk_uarridx_t duk_js_to_arrayindex_string_helper(duk_hstring *h);
DUK_INTERNAL_DECL duk_bool_t duk_js_equals_helper(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y, duk_small_int_t flags);
DUK_INTERNAL_DECL duk_small_int_t duk_js_data_compare(const duk_uint8_t *buf1, const duk_uint8_t *buf2, duk_size_t len1, duk_size_t len2);
DUK_INTERNAL_DECL duk_small_int_t duk_js_string_compare(duk_hstring *h1, duk_hstring *h2);
#if 0 /* unused */
DUK_INTERNAL_DECL duk_small_int_t duk_js_buffer_compare(duk_heap *heap, duk_hbuffer *h1, duk_hbuffer *h2);
#endif
DUK_INTERNAL_DECL duk_bool_t duk_js_compare_helper(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y, duk_small_int_t flags);
DUK_INTERNAL_DECL duk_bool_t duk_js_instanceof(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y);
DUK_INTERNAL_DECL duk_bool_t duk_js_in(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y);
DUK_INTERNAL_DECL duk_hstring *duk_js_typeof(duk_hthread *thr, duk_tval *tv_x);
#define duk_js_equals(thr,tv_x,tv_y) \
duk_js_equals_helper((thr), (tv_x), (tv_y), 0)
#define duk_js_strict_equals(tv_x,tv_y) \
duk_js_equals_helper(NULL, (tv_x), (tv_y), DUK_EQUALS_FLAG_STRICT)
#define duk_js_samevalue(tv_x,tv_y) \
duk_js_equals_helper(NULL, (tv_x), (tv_y), DUK_EQUALS_FLAG_SAMEVALUE)
/* E5 Sections 11.8.1, 11.8.5; x < y */
#define duk_js_lessthan(thr,tv_x,tv_y) \
duk_js_compare_helper((thr), (tv_x), (tv_Y), DUK_COMPARE_FLAG_EVAL_LEFT_FIRST)
/* E5 Sections 11.8.2, 11.8.5; x > y --> y < x */
#define duk_js_greaterthan(thr,tv_x,tv_y) \
duk_js_compare_helper((thr), (tv_y), (tv_x), 0)
/* E5 Sections 11.8.3, 11.8.5; x <= y --> not (x > y) --> not (y < x) */
#define duk_js_lessthanorequal(thr,tv_x,tv_y) \
duk_js_compare_helper((thr), (tv_y), (tv_x), DUK_COMPARE_FLAG_NEGATE)
/* E5 Sections 11.8.4, 11.8.5; x >= y --> not (x < y) */
#define duk_js_greaterthanorequal(thr,tv_x,tv_y) \
duk_js_compare_helper((thr), (tv_x), (tv_y), DUK_COMPARE_FLAG_EVAL_LEFT_FIRST | DUK_COMPARE_FLAG_NEGATE)
/* identifiers and environment handling */
#if 0 /*unused*/
DUK_INTERNAL duk_bool_t duk_js_hasvar_envrec(duk_hthread *thr, duk_hobject *env, duk_hstring *name);
#endif
DUK_INTERNAL_DECL duk_bool_t duk_js_getvar_envrec(duk_hthread *thr, duk_hobject *env, duk_hstring *name, duk_bool_t throw_flag);
DUK_INTERNAL_DECL duk_bool_t duk_js_getvar_activation(duk_hthread *thr, duk_activation *act, duk_hstring *name, duk_bool_t throw_flag);
DUK_INTERNAL_DECL void duk_js_putvar_envrec(duk_hthread *thr, duk_hobject *env, duk_hstring *name, duk_tval *val, duk_bool_t strict);
DUK_INTERNAL_DECL void duk_js_putvar_activation(duk_hthread *thr, duk_activation *act, duk_hstring *name, duk_tval *val, duk_bool_t strict);
#if 0 /*unused*/
DUK_INTERNAL_DECL duk_bool_t duk_js_delvar_envrec(duk_hthread *thr, duk_hobject *env, duk_hstring *name);
#endif
DUK_INTERNAL_DECL duk_bool_t duk_js_delvar_activation(duk_hthread *thr, duk_activation *act, duk_hstring *name);
DUK_INTERNAL_DECL duk_bool_t duk_js_declvar_activation(duk_hthread *thr, duk_activation *act, duk_hstring *name, duk_tval *val, duk_small_int_t prop_flags, duk_bool_t is_func_decl);
DUK_INTERNAL_DECL void duk_js_init_activation_environment_records_delayed(duk_hthread *thr, duk_activation *act);
DUK_INTERNAL_DECL void duk_js_close_environment_record(duk_hthread *thr, duk_hobject *env, duk_hobject *func, duk_size_t regbase);
DUK_INTERNAL_DECL duk_hobject *duk_create_activation_environment_record(duk_hthread *thr, duk_hobject *func, duk_size_t idx_bottom);
DUK_INTERNAL_DECL
void duk_js_push_closure(duk_hthread *thr,
duk_hcompiledfunction *fun_temp,
duk_hobject *outer_var_env,
duk_hobject *outer_lex_env,
duk_bool_t add_auto_proto);
/* call handling */
DUK_INTERNAL_DECL duk_int_t duk_handle_call_protected(duk_hthread *thr, duk_idx_t num_stack_args, duk_small_uint_t call_flags);
DUK_INTERNAL_DECL void duk_handle_call_unprotected(duk_hthread *thr, duk_idx_t num_stack_args, duk_small_uint_t call_flags);
DUK_INTERNAL_DECL duk_int_t duk_handle_safe_call(duk_hthread *thr, duk_safe_call_function func, duk_idx_t num_stack_args, duk_idx_t num_stack_res);
DUK_INTERNAL_DECL duk_bool_t duk_handle_ecma_call_setup(duk_hthread *thr, duk_idx_t num_stack_args, duk_small_uint_t call_flags);
/* bytecode execution */
DUK_INTERNAL_DECL void duk_js_execute_bytecode(duk_hthread *exec_thr);
#endif /* DUK_JS_H_INCLUDED */
#line 1 "duk_numconv.h"
#ifndef DUK_NUMCONV_H_INCLUDED
#define DUK_NUMCONV_H_INCLUDED
/*
* Number-to-string conversion. The semantics of these is very tightly
* bound with the Ecmascript semantics required for call sites.
*/
/* Output a specified number of digits instead of using the shortest
* form. Used for toPrecision() and toFixed().
*/
#define DUK_N2S_FLAG_FIXED_FORMAT (1 << 0)
/* Force exponential format. Used for toExponential(). */
#define DUK_N2S_FLAG_FORCE_EXP (1 << 1)
/* If number would need zero padding (for whole number part), use
* exponential format instead. E.g. if input number is 12300, 3
* digits are generated ("123"), output "1.23e+4" instead of "12300".
* Used for toPrecision().
*/
#define DUK_N2S_FLAG_NO_ZERO_PAD (1 << 2)
/* Digit count indicates number of fractions (i.e. an absolute
* digit index instead of a relative one). Used together with
* DUK_N2S_FLAG_FIXED_FORMAT for toFixed().
*/
#define DUK_N2S_FLAG_FRACTION_DIGITS (1 << 3)
/*
* String-to-number conversion
*/
/* Maximum exponent value when parsing numbers. This is not strictly
* compliant as there should be no upper limit, but as we parse the
* exponent without a bigint, impose some limit.
*/
#define DUK_S2N_MAX_EXPONENT 1000000000
/* Trim white space (= allow leading and trailing whitespace) */
#define DUK_S2N_FLAG_TRIM_WHITE (1 << 0)
/* Allow exponent */
#define DUK_S2N_FLAG_ALLOW_EXP (1 << 1)
/* Allow trailing garbage (e.g. treat "123foo" as "123) */
#define DUK_S2N_FLAG_ALLOW_GARBAGE (1 << 2)
/* Allow leading plus sign */
#define DUK_S2N_FLAG_ALLOW_PLUS (1 << 3)
/* Allow leading minus sign */
#define DUK_S2N_FLAG_ALLOW_MINUS (1 << 4)
/* Allow 'Infinity' */
#define DUK_S2N_FLAG_ALLOW_INF (1 << 5)
/* Allow fraction part */
#define DUK_S2N_FLAG_ALLOW_FRAC (1 << 6)
/* Allow naked fraction (e.g. ".123") */
#define DUK_S2N_FLAG_ALLOW_NAKED_FRAC (1 << 7)
/* Allow empty fraction (e.g. "123.") */
#define DUK_S2N_FLAG_ALLOW_EMPTY_FRAC (1 << 8)
/* Allow empty string to be interpreted as 0 */
#define DUK_S2N_FLAG_ALLOW_EMPTY_AS_ZERO (1 << 9)
/* Allow leading zeroes (e.g. "0123" -> "123") */
#define DUK_S2N_FLAG_ALLOW_LEADING_ZERO (1 << 10)
/* Allow automatic detection of hex base ("0x" or "0X" prefix),
* overrides radix argument and forces integer mode.
*/
#define DUK_S2N_FLAG_ALLOW_AUTO_HEX_INT (1 << 11)
/* Allow automatic detection of octal base, overrides radix
* argument and forces integer mode.
*/
#define DUK_S2N_FLAG_ALLOW_AUTO_OCT_INT (1 << 12)
/*
* Prototypes
*/
DUK_INTERNAL_DECL void duk_numconv_stringify(duk_context *ctx, duk_small_int_t radix, duk_small_int_t digits, duk_small_uint_t flags);
DUK_INTERNAL_DECL void duk_numconv_parse(duk_context *ctx, duk_small_int_t radix, duk_small_uint_t flags);
#endif /* DUK_NUMCONV_H_INCLUDED */
#line 1 "duk_bi_protos.h"
/*
* Prototypes for built-in functions not automatically covered by the
* header declarations emitted by genbuiltins.py.
*/
#ifndef DUK_BUILTIN_PROTOS_H_INCLUDED
#define DUK_BUILTIN_PROTOS_H_INCLUDED
/* Buffer size needed for duk_bi_date_format_timeval().
* Accurate value is 32 + 1 for NUL termination:
* >>> len('+123456-01-23T12:34:56.123+12:34')
* 32
* Include additional space to be safe.
*/
#define DUK_BI_DATE_ISO8601_BUFSIZE 48
/* Maximum length of CommonJS module identifier to resolve. Length includes
* both current module ID, requested (possibly relative) module ID, and a
* slash in between.
*/
#define DUK_BI_COMMONJS_MODULE_ID_LIMIT 256
/* Helpers exposed for internal use */
DUK_INTERNAL_DECL void duk_bi_date_timeval_to_parts(duk_double_t d, duk_int_t *parts, duk_double_t *dparts, duk_small_uint_t flags);
DUK_INTERNAL_DECL duk_double_t duk_bi_date_get_timeval_from_dparts(duk_double_t *dparts, duk_small_uint_t flags);
DUK_INTERNAL_DECL void duk_bi_date_format_timeval(duk_double_t timeval, duk_uint8_t *out_buf);
DUK_INTERNAL_DECL duk_bool_t duk_bi_date_is_leap_year(duk_int_t year);
DUK_INTERNAL_DECL duk_bool_t duk_bi_date_timeval_in_valid_range(duk_double_t x);
DUK_INTERNAL_DECL duk_bool_t duk_bi_date_year_in_valid_range(duk_double_t year);
DUK_INTERNAL_DECL duk_bool_t duk_bi_date_timeval_in_leeway_range(duk_double_t x);
/* Built-in providers */
#if defined(DUK_USE_DATE_NOW_GETTIMEOFDAY)
DUK_INTERNAL_DECL duk_double_t duk_bi_date_get_now_gettimeofday(duk_context *ctx);
#endif
#if defined(DUK_USE_DATE_NOW_TIME)
DUK_INTERNAL_DECL duk_double_t duk_bi_date_get_now_time(duk_context *ctx);
#endif
#if defined(DUK_USE_DATE_NOW_WINDOWS)
DUK_INTERNAL_DECL duk_double_t duk_bi_date_get_now_windows(duk_context *ctx);
#endif
#if defined(DUK_USE_DATE_TZO_GMTIME_R) || defined(DUK_USE_DATE_TZO_GMTIME)
DUK_INTERNAL_DECL duk_int_t duk_bi_date_get_local_tzoffset_gmtime(duk_double_t d);
#endif
#if defined(DUK_USE_DATE_TZO_WINDOWS)
DUK_INTERNAL_DECL duk_int_t duk_bi_date_get_local_tzoffset_windows(duk_double_t d);
#endif
#if defined(DUK_USE_DATE_PRS_STRPTIME)
DUK_INTERNAL_DECL duk_bool_t duk_bi_date_parse_string_strptime(duk_context *ctx, const char *str);
#endif
#if defined(DUK_USE_DATE_PRS_GETDATE)
DUK_INTERNAL_DECL duk_bool_t duk_bi_date_parse_string_getdate(duk_context *ctx, const char *str);
#endif
#if defined(DUK_USE_DATE_FMT_STRFTIME)
DUK_INTERNAL_DECL duk_bool_t duk_bi_date_format_parts_strftime(duk_context *ctx, duk_int_t *parts, duk_int_t tzoffset, duk_small_uint_t flags);
#endif
DUK_INTERNAL_DECL
void duk_bi_json_parse_helper(duk_context *ctx,
duk_idx_t idx_value,
duk_idx_t idx_reviver,
duk_small_uint_t flags);
DUK_INTERNAL_DECL
void duk_bi_json_stringify_helper(duk_context *ctx,
duk_idx_t idx_value,
duk_idx_t idx_replacer,
duk_idx_t idx_space,
duk_small_uint_t flags);
#endif /* DUK_BUILTIN_PROTOS_H_INCLUDED */
#line 1 "duk_selftest.h"
/*
* Selftest code
*/
#ifndef DUK_SELFTEST_H_INCLUDED
#define DUK_SELFTEST_H_INCLUDED
#if defined(DUK_USE_SELF_TESTS)
DUK_INTERNAL_DECL void duk_selftest_run_tests(void);
#endif
#endif /* DUK_SELFTEST_H_INCLUDED */
#line 78 "duk_internal.h"
#endif /* DUK_INTERNAL_H_INCLUDED */
#line 1 "duk_replacements.c"
/*
* Replacements for missing platform functions.
*
* Unlike the originals, fpclassify() and signbit() replacements don't
* work on any floating point types, only doubles. The C typing here
* mimics the standard prototypes.
*/
/* include removed: duk_internal.h */
#if defined(DUK_USE_COMPUTED_NAN)
DUK_INTERNAL double duk_computed_nan;
#endif
#if defined(DUK_USE_COMPUTED_INFINITY)
DUK_INTERNAL double duk_computed_infinity;
#endif
#if defined(DUK_USE_REPL_FPCLASSIFY)
DUK_INTERNAL int duk_repl_fpclassify(double x) {
duk_double_union u;
duk_uint_fast16_t expt;
duk_small_int_t mzero;
u.d = x;
expt = (duk_uint_fast16_t) (u.us[DUK_DBL_IDX_US0] & 0x7ff0UL);
if (expt > 0x0000UL && expt < 0x7ff0UL) {
/* expt values [0x001,0x7fe] = normal */
return DUK_FP_NORMAL;
}
mzero = (u.ui[DUK_DBL_IDX_UI1] == 0 && (u.ui[DUK_DBL_IDX_UI0] & 0x000fffffUL) == 0);
if (expt == 0x0000UL) {
/* expt 0x000 is zero/subnormal */
if (mzero) {
return DUK_FP_ZERO;
} else {
return DUK_FP_SUBNORMAL;
}
} else {
/* expt 0xfff is infinite/nan */
if (mzero) {
return DUK_FP_INFINITE;
} else {
return DUK_FP_NAN;
}
}
}
#endif
#if defined(DUK_USE_REPL_SIGNBIT)
DUK_INTERNAL int duk_repl_signbit(double x) {
duk_double_union u;
u.d = x;
return (int) (u.uc[DUK_DBL_IDX_UC0] & 0x80UL);
}
#endif
#if defined(DUK_USE_REPL_ISFINITE)
DUK_INTERNAL int duk_repl_isfinite(double x) {
int c = DUK_FPCLASSIFY(x);
if (c == DUK_FP_NAN || c == DUK_FP_INFINITE) {
return 0;
} else {
return 1;
}
}
#endif
#if defined(DUK_USE_REPL_ISNAN)
DUK_INTERNAL int duk_repl_isnan(double x) {
int c = DUK_FPCLASSIFY(x);
return (c == DUK_FP_NAN);
}
#endif
#if defined(DUK_USE_REPL_ISINF)
DUK_INTERNAL int duk_repl_isinf(double x) {
int c = DUK_FPCLASSIFY(x);
return (c == DUK_FP_INFINITE);
}
#endif
#line 1 "duk_strings.c"
/*
* Shared error message strings
*
* To minimize code footprint, try to share error messages inside Duktape
* code. Modern compilers will do this automatically anyway, this is mostly
* for older compilers.
*/
/* include removed: duk_internal.h */
/* Mostly API and built-in method related */
DUK_INTERNAL const char *duk_str_internal_error = "internal error";
DUK_INTERNAL const char *duk_str_invalid_count = "invalid count";
DUK_INTERNAL const char *duk_str_invalid_call_args = "invalid call args";
DUK_INTERNAL const char *duk_str_not_constructable = "not constructable";
DUK_INTERNAL const char *duk_str_not_callable = "not callable";
DUK_INTERNAL const char *duk_str_not_extensible = "not extensible";
DUK_INTERNAL const char *duk_str_not_writable = "not writable";
DUK_INTERNAL const char *duk_str_not_configurable = "not configurable";
DUK_INTERNAL const char *duk_str_invalid_context = "invalid context";
DUK_INTERNAL const char *duk_str_push_beyond_alloc_stack = "attempt to push beyond currently allocated stack";
DUK_INTERNAL const char *duk_str_not_buffer = "not buffer"; /* still in use with verbose messages */
DUK_INTERNAL const char *duk_str_unexpected_type = "unexpected type";
DUK_INTERNAL const char *duk_str_defaultvalue_coerce_failed = "[[DefaultValue]] coerce failed";
DUK_INTERNAL const char *duk_str_number_outside_range = "number outside range";
DUK_INTERNAL const char *duk_str_not_object_coercible = "not object coercible";
DUK_INTERNAL const char *duk_str_string_too_long = "string too long";
DUK_INTERNAL const char *duk_str_buffer_too_long = "buffer too long";
DUK_INTERNAL const char *duk_str_sprintf_too_long = "sprintf message too long";
DUK_INTERNAL const char *duk_str_alloc_failed = "alloc failed";
DUK_INTERNAL const char *duk_str_pop_too_many = "attempt to pop too many entries";
DUK_INTERNAL const char *duk_str_wrong_buffer_type = "wrong buffer type";
DUK_INTERNAL const char *duk_str_encode_failed = "encode failed";
DUK_INTERNAL const char *duk_str_decode_failed = "decode failed";
DUK_INTERNAL const char *duk_str_no_sourcecode = "no sourcecode";
DUK_INTERNAL const char *duk_str_concat_result_too_long = "concat result too long";
DUK_INTERNAL const char *duk_str_unimplemented = "unimplemented";
DUK_INTERNAL const char *duk_str_unsupported = "unsupported";
DUK_INTERNAL const char *duk_str_array_length_over_2g = "array length over 2G";
/* JSON */
DUK_INTERNAL const char *duk_str_fmt_ptr = "%p";
DUK_INTERNAL const char *duk_str_fmt_invalid_json = "invalid json (at offset %ld)";
DUK_INTERNAL const char *duk_str_jsondec_reclimit = "json decode recursion limit";
DUK_INTERNAL const char *duk_str_jsonenc_reclimit = "json encode recursion limit";
DUK_INTERNAL const char *duk_str_cyclic_input = "cyclic input";
/* Object property access */
DUK_INTERNAL const char *duk_str_proxy_revoked = "proxy revoked";
DUK_INTERNAL const char *duk_str_invalid_base = "invalid base value";
DUK_INTERNAL const char *duk_str_strict_caller_read = "attempt to read strict 'caller'";
DUK_INTERNAL const char *duk_str_proxy_rejected = "proxy rejected";
DUK_INTERNAL const char *duk_str_invalid_array_length = "invalid array length";
DUK_INTERNAL const char *duk_str_array_length_write_failed = "array length write failed";
DUK_INTERNAL const char *duk_str_array_length_not_writable = "array length non-writable";
DUK_INTERNAL const char *duk_str_setter_undefined = "setter undefined";
DUK_INTERNAL const char *duk_str_redefine_virt_prop = "attempt to redefine virtual property";
DUK_INTERNAL const char *duk_str_invalid_descriptor = "invalid descriptor";
DUK_INTERNAL const char *duk_str_property_is_virtual = "property is virtual";
/* Compiler */
DUK_INTERNAL const char *duk_str_parse_error = "parse error";
DUK_INTERNAL const char *duk_str_duplicate_label = "duplicate label";
DUK_INTERNAL const char *duk_str_invalid_label = "invalid label";
DUK_INTERNAL const char *duk_str_invalid_array_literal = "invalid array literal";
DUK_INTERNAL const char *duk_str_invalid_object_literal = "invalid object literal";
DUK_INTERNAL const char *duk_str_invalid_var_declaration = "invalid variable declaration";
DUK_INTERNAL const char *duk_str_cannot_delete_identifier = "cannot delete identifier";
DUK_INTERNAL const char *duk_str_invalid_expression = "invalid expression";
DUK_INTERNAL const char *duk_str_invalid_lvalue = "invalid lvalue";
DUK_INTERNAL const char *duk_str_expected_identifier = "expected identifier";
DUK_INTERNAL const char *duk_str_empty_expr_not_allowed = "empty expression not allowed";
DUK_INTERNAL const char *duk_str_invalid_for = "invalid for statement";
DUK_INTERNAL const char *duk_str_invalid_switch = "invalid switch statement";
DUK_INTERNAL const char *duk_str_invalid_break_cont_label = "invalid break/continue label";
DUK_INTERNAL const char *duk_str_invalid_return = "invalid return";
DUK_INTERNAL const char *duk_str_invalid_try = "invalid try";
DUK_INTERNAL const char *duk_str_invalid_throw = "invalid throw";
DUK_INTERNAL const char *duk_str_with_in_strict_mode = "with in strict mode";
DUK_INTERNAL const char *duk_str_func_stmt_not_allowed = "function statement not allowed";
DUK_INTERNAL const char *duk_str_unterminated_stmt = "unterminated statement";
DUK_INTERNAL const char *duk_str_invalid_arg_name = "invalid argument name";
DUK_INTERNAL const char *duk_str_invalid_func_name = "invalid function name";
DUK_INTERNAL const char *duk_str_invalid_getset_name = "invalid getter/setter name";
DUK_INTERNAL const char *duk_str_func_name_required = "function name required";
/* Regexp */
DUK_INTERNAL const char *duk_str_invalid_quantifier_no_atom = "quantifier without preceding atom";
DUK_INTERNAL const char *duk_str_invalid_quantifier_values = "quantifier values invalid (qmin > qmax)";
DUK_INTERNAL const char *duk_str_quantifier_too_many_copies = "quantifier expansion requires too many atom copies";
DUK_INTERNAL const char *duk_str_unexpected_closing_paren = "unexpected closing parenthesis";
DUK_INTERNAL const char *duk_str_unexpected_end_of_pattern = "unexpected end of pattern";
DUK_INTERNAL const char *duk_str_unexpected_regexp_token = "unexpected token in regexp";
DUK_INTERNAL const char *duk_str_invalid_regexp_flags = "invalid regexp flags";
DUK_INTERNAL const char *duk_str_invalid_backrefs = "invalid backreference(s)";
/* Limits */
DUK_INTERNAL const char *duk_str_valstack_limit = "valstack limit";
DUK_INTERNAL const char *duk_str_callstack_limit = "callstack limit";
DUK_INTERNAL const char *duk_str_catchstack_limit = "catchstack limit";
DUK_INTERNAL const char *duk_str_prototype_chain_limit = "prototype chain limit";
DUK_INTERNAL const char *duk_str_bound_chain_limit = "function call bound chain limit";
DUK_INTERNAL const char *duk_str_c_callstack_limit = "C call stack depth limit";
DUK_INTERNAL const char *duk_str_compiler_recursion_limit = "compiler recursion limit";
DUK_INTERNAL const char *duk_str_bytecode_limit = "bytecode limit";
DUK_INTERNAL const char *duk_str_reg_limit = "register limit";
DUK_INTERNAL const char *duk_str_temp_limit = "temp limit";
DUK_INTERNAL const char *duk_str_const_limit = "const limit";
DUK_INTERNAL const char *duk_str_func_limit = "function limit";
DUK_INTERNAL const char *duk_str_regexp_compiler_recursion_limit = "regexp compiler recursion limit";
DUK_INTERNAL const char *duk_str_regexp_executor_recursion_limit = "regexp executor recursion limit";
DUK_INTERNAL const char *duk_str_regexp_executor_step_limit = "regexp step limit";
/* Misc */
#line 1 "duk_debug_macros.c"
/*
* Debugging macro calls.
*/
/* include removed: duk_internal.h */
#ifdef DUK_USE_DEBUG
/*
* Debugging enabled
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#define DUK__DEBUG_BUFSIZE DUK_USE_DEBUG_BUFSIZE
DUK_LOCAL char duk__debug_buf[DUK__DEBUG_BUFSIZE];
DUK_LOCAL const char *duk__get_level_string(duk_small_int_t level) {
switch ((int) level) {
case DUK_LEVEL_DEBUG:
return "D";
case DUK_LEVEL_DDEBUG:
return "DD";
case DUK_LEVEL_DDDEBUG:
return "DDD";
}
return "???";
}
#ifdef DUK_USE_DPRINT_COLORS
/* http://en.wikipedia.org/wiki/ANSI_escape_code */
#define DUK__TERM_REVERSE "\x1b[7m"
#define DUK__TERM_BRIGHT "\x1b[1m"
#define DUK__TERM_RESET "\x1b[0m"
#define DUK__TERM_BLUE "\x1b[34m"
#define DUK__TERM_RED "\x1b[31m"
DUK_LOCAL const char *duk__get_term_1(duk_small_int_t level) {
DUK_UNREF(level);
return (const char *) DUK__TERM_RED;
}
DUK_LOCAL const char *duk__get_term_2(duk_small_int_t level) {
switch ((int) level) {
case DUK_LEVEL_DEBUG:
return (const char *) (DUK__TERM_RESET DUK__TERM_BRIGHT);
case DUK_LEVEL_DDEBUG:
return (const char *) (DUK__TERM_RESET);
case DUK_LEVEL_DDDEBUG:
return (const char *) (DUK__TERM_RESET DUK__TERM_BLUE);
}
return (const char *) DUK__TERM_RESET;
}
DUK_LOCAL const char *duk__get_term_3(duk_small_int_t level) {
DUK_UNREF(level);
return (const char *) DUK__TERM_RESET;
}
#else
DUK_LOCAL const char *duk__get_term_1(duk_small_int_t level) {
DUK_UNREF(level);
return (const char *) "";
}
DUK_LOCAL const char *duk__get_term_2(duk_small_int_t level) {
DUK_UNREF(level);
return (const char *) "";
}
DUK_LOCAL const char *duk__get_term_3(duk_small_int_t level) {
DUK_UNREF(level);
return (const char *) "";
}
#endif /* DUK_USE_DPRINT_COLORS */
#ifdef DUK_USE_VARIADIC_MACROS
DUK_INTERNAL void duk_debug_log(duk_small_int_t level, const char *file, duk_int_t line, const char *func, const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
DUK_MEMZERO((void *) duk__debug_buf, (size_t) DUK__DEBUG_BUFSIZE);
duk_debug_vsnprintf(duk__debug_buf, DUK__DEBUG_BUFSIZE - 1, fmt, ap);
DUK_FPRINTF(DUK_STDERR, "%s[%s] %s:%ld (%s):%s %s%s\n",
(const char *) duk__get_term_1(level),
(const char *) duk__get_level_string(level),
(const char *) file,
(long) line,
(const char *) func,
(const char *) duk__get_term_2(level),
(const char *) duk__debug_buf,
(const char *) duk__get_term_3(level));
DUK_FFLUSH(DUK_STDERR);
va_end(ap);
}
#else /* DUK_USE_VARIADIC_MACROS */
DUK_INTERNAL char duk_debug_file_stash[DUK_DEBUG_STASH_SIZE];
DUK_INTERNAL char duk_debug_line_stash[DUK_DEBUG_STASH_SIZE];
DUK_INTERNAL char duk_debug_func_stash[DUK_DEBUG_STASH_SIZE];
DUK_INTERNAL duk_small_int_t duk_debug_level_stash;
DUK_INTERNAL void duk_debug_log(const char *fmt, ...) {
va_list ap;
duk_small_int_t level = duk_debug_level_stash;
va_start(ap, fmt);
DUK_MEMZERO((void *) duk__debug_buf, (size_t) DUK__DEBUG_BUFSIZE);
duk_debug_vsnprintf(duk__debug_buf, DUK__DEBUG_BUFSIZE - 1, fmt, ap);
DUK_FPRINTF(DUK_STDERR, "%s[%s] %s:%s (%s):%s %s%s\n",
(const char *) duk__get_term_1(level),
(const char *) duk__get_level_string(duk_debug_level_stash),
(const char *) duk_debug_file_stash,
(const char *) duk_debug_line_stash,
(const char *) duk_debug_func_stash,
(const char *) duk__get_term_2(level),
(const char *) duk__debug_buf,
(const char *) duk__get_term_3(level));
DUK_FFLUSH(DUK_STDERR);
va_end(ap);
}
#endif /* DUK_USE_VARIADIC_MACROS */
#else /* DUK_USE_DEBUG */
/*
* Debugging disabled
*/
#endif /* DUK_USE_DEBUG */
#line 1 "duk_builtins.c"
/*
* Automatically generated by genbuiltins.py, do not edit!
*/
/* include removed: duk_internal.h */
#if defined(DUK_USE_ROM_STRINGS)
#error ROM support not enabled, rerun make_dist.py with --rom-support
#else /* DUK_USE_ROM_STRINGS */
DUK_INTERNAL const duk_uint8_t duk_strings_data[1049] = {
79,104,209,144,168,105,6,78,182,139,90,122,8,154,140,35,103,35,117,193,73,
5,52,116,180,104,166,135,52,189,4,98,12,27,178,156,80,211,31,161,115,150,
64,52,221,109,24,18,68,157,24,38,67,118,36,55,73,119,151,164,140,93,18,117,
128,153,201,228,201,205,2,250,8,196,24,232,104,82,146,40,232,193,48,118,
168,37,147,212,54,127,113,208,70,32,194,187,68,54,127,113,208,70,32,196,
123,68,54,127,113,209,44,12,121,7,208,70,32,194,186,134,207,236,126,219,
160,140,65,133,246,136,108,254,199,237,186,8,196,24,87,80,217,253,159,217,
116,17,136,48,190,209,13,159,217,253,151,65,24,131,12,233,86,224,79,236,
254,203,160,140,65,134,116,171,112,39,246,223,105,208,70,32,193,140,183,4,
11,55,92,20,244,141,169,186,50,11,164,109,77,208,208,165,36,79,215,185,13,
153,34,110,204,241,32,6,66,84,11,112,200,84,52,157,124,92,242,70,120,45,64,
186,17,22,138,38,0,172,140,19,154,84,26,145,0,86,69,17,180,97,34,0,172,132,
75,144,215,77,221,91,132,5,147,178,156,80,211,30,160,93,9,215,21,115,119,
169,49,75,211,138,26,101,205,222,68,157,47,78,40,105,151,55,120,204,156,
189,56,161,166,52,157,72,136,138,65,154,232,147,162,4,136,150,81,115,66,
208,210,37,96,148,250,134,140,151,39,212,125,255,221,125,73,80,209,146,233,
124,93,55,79,15,34,196,230,202,113,160,166,232,157,132,148,128,98,28,46,
114,200,6,153,180,96,73,19,74,113,67,76,103,5,36,20,211,70,140,133,67,72,
49,245,160,235,81,212,52,168,106,39,132,253,111,80,210,161,168,158,5,245,
191,96,31,172,15,208,23,226,190,131,232,62,131,232,11,251,127,93,245,223,
93,251,172,234,27,80,45,3,250,14,140,19,34,65,19,81,132,108,228,97,1,107,
33,12,32,45,100,136,206,9,12,196,155,134,69,146,100,235,226,231,146,51,194,
72,218,48,145,4,200,119,89,189,81,49,39,72,147,235,226,233,186,120,121,58,
226,167,90,124,93,55,107,71,137,33,68,68,130,64,206,75,189,209,156,144,84,
44,141,3,8,137,187,178,156,80,211,26,110,242,100,230,146,120,121,8,48,76,6,
89,26,105,157,65,196,201,213,145,166,153,212,28,76,157,113,75,34,78,62,14,
38,73,105,228,142,136,178,48,141,152,228,73,150,83,0,148,39,137,75,67,73,
214,209,129,36,85,190,206,32,17,6,9,128,141,3,8,130,161,100,235,64,194,24,
52,41,73,19,189,200,108,201,19,111,181,2,232,66,239,173,37,230,157,244,56,
153,4,225,145,27,233,93,22,1,114,62,251,80,69,128,121,247,213,146,228,109,
79,190,212,17,35,106,125,246,78,164,68,68,111,175,23,217,45,13,33,119,208,
68,210,38,250,192,61,91,233,80,208,45,25,36,81,190,156,13,26,201,19,239,
162,2,214,66,31,125,153,226,64,13,27,236,72,96,130,68,62,251,48,68,196,153,
119,217,157,18,56,156,199,161,100,42,26,250,77,36,140,122,40,144,19,34,9,
24,246,103,139,172,150,56,125,145,1,17,29,44,112,250,183,0,100,24,200,218,
140,228,185,130,9,19,237,190,208,73,184,146,35,68,146,163,8,50,178,99,136,
44,89,196,2,33,70,64,208,196,67,74,226,88,17,105,73,24,186,37,40,38,5,133,
161,89,4,183,25,115,119,86,227,118,83,138,26,103,255,223,209,106,141,25,11,
244,95,117,56,208,159,250,223,251,250,45,52,13,250,47,186,156,104,79,253,
111,253,253,22,144,210,253,23,221,78,52,39,254,187,254,254,139,77,67,75,
244,95,117,56,208,159,250,239,251,250,45,22,141,23,209,125,212,227,66,127,
235,63,239,69,163,69,247,83,141,9,255,165,12,72,5,16,64,145,10,32,76,71,64,
156,217,161,180,34,6,64,208,198,36,78,50,20,20,92,204,50,44,147,32,134,226,
17,114,33,202,134,129,107,192,202,232,160,180,104,166,135,52,72,40,144,213,
33,178,152,26,34,56,163,105,44,104,146,116,139,77,43,34,98,57,38,116,72,
179,60,93,97,206,56,52,240,242,56,163,168,34,81,57,178,153,42,228,12,182,
58,22,66,89,19,57,68,176,74,68,35,104,195,18,239,116,102,114,94,100,104,
228,100,49,238,140,203,42,60,145,35,104,181,146,113,161,10,80,46,68,82,24,
245,145,132,108,228,148,54,100,137,64,34,13,100,153,222,1,40,6,33,223,20,
84,19,34,95,23,76,130,153,6,103,208,43,64,141,41,130,104,17,112,130,44,96,
};
#endif /* DUK_USE_ROM_STRINGS */
#if defined(DUK_USE_ROM_OBJECTS)
#error ROM support not enabled, rerun make_dist.py with --rom-support
#else /* DUK_USE_ROM_OBJECTS */
/* native functions: 149 */
DUK_INTERNAL const duk_c_function duk_bi_native_functions[149] = {
duk_bi_array_constructor,
duk_bi_array_constructor_is_array,
duk_bi_array_prototype_concat,
duk_bi_array_prototype_indexof_shared,
duk_bi_array_prototype_iter_shared,
duk_bi_array_prototype_join_shared,
duk_bi_array_prototype_pop,
duk_bi_array_prototype_push,
duk_bi_array_prototype_reduce_shared,
duk_bi_array_prototype_reverse,
duk_bi_array_prototype_shift,
duk_bi_array_prototype_slice,
duk_bi_array_prototype_sort,
duk_bi_array_prototype_splice,
duk_bi_array_prototype_to_string,
duk_bi_array_prototype_unshift,
duk_bi_arraybuffer_constructor,
duk_bi_arraybuffer_isview,
duk_bi_boolean_constructor,
duk_bi_boolean_prototype_tostring_shared,
duk_bi_buffer_compare_shared,
duk_bi_buffer_constructor,
duk_bi_buffer_prototype_tostring_shared,
duk_bi_buffer_readfield,
duk_bi_buffer_slice_shared,
duk_bi_buffer_writefield,
duk_bi_dataview_constructor,
duk_bi_date_constructor,
duk_bi_date_constructor_now,
duk_bi_date_constructor_parse,
duk_bi_date_constructor_utc,
duk_bi_date_prototype_get_shared,
duk_bi_date_prototype_get_timezone_offset,
duk_bi_date_prototype_set_shared,
duk_bi_date_prototype_set_time,
duk_bi_date_prototype_to_json,
duk_bi_date_prototype_tostring_shared,
duk_bi_date_prototype_value_of,
duk_bi_duktape_object_act,
duk_bi_duktape_object_compact,
duk_bi_duktape_object_dec,
duk_bi_duktape_object_enc,
duk_bi_duktape_object_fin,
duk_bi_duktape_object_gc,
duk_bi_duktape_object_info,
duk_bi_error_constructor_shared,
duk_bi_error_prototype_filename_getter,
duk_bi_error_prototype_filename_setter,
duk_bi_error_prototype_linenumber_getter,
duk_bi_error_prototype_linenumber_setter,
duk_bi_error_prototype_stack_getter,
duk_bi_error_prototype_stack_setter,
duk_bi_error_prototype_to_string,
duk_bi_function_constructor,
duk_bi_function_prototype,
duk_bi_function_prototype_apply,
duk_bi_function_prototype_bind,
duk_bi_function_prototype_call,
duk_bi_function_prototype_to_string,
duk_bi_global_object_decode_uri,
duk_bi_global_object_decode_uri_component,
duk_bi_global_object_encode_uri,
duk_bi_global_object_encode_uri_component,
duk_bi_global_object_escape,
duk_bi_global_object_eval,
duk_bi_global_object_is_finite,
duk_bi_global_object_is_nan,
duk_bi_global_object_parse_float,
duk_bi_global_object_parse_int,
duk_bi_global_object_print_helper,
duk_bi_global_object_require,
duk_bi_global_object_unescape,
duk_bi_json_object_parse,
duk_bi_json_object_stringify,
duk_bi_logger_constructor,
duk_bi_logger_prototype_fmt,
duk_bi_logger_prototype_log_shared,
duk_bi_logger_prototype_raw,
duk_bi_math_object_max,
duk_bi_math_object_min,
duk_bi_math_object_onearg_shared,
duk_bi_math_object_random,
duk_bi_math_object_twoarg_shared,
duk_bi_nodejs_buffer_byte_length,
duk_bi_nodejs_buffer_concat,
duk_bi_nodejs_buffer_constructor,
duk_bi_nodejs_buffer_copy,
duk_bi_nodejs_buffer_fill,
duk_bi_nodejs_buffer_is_buffer,
duk_bi_nodejs_buffer_is_encoding,
duk_bi_nodejs_buffer_tojson,
duk_bi_nodejs_buffer_tostring,
duk_bi_nodejs_buffer_write,
duk_bi_number_constructor,
duk_bi_number_prototype_to_exponential,
duk_bi_number_prototype_to_fixed,
duk_bi_number_prototype_to_locale_string,
duk_bi_number_prototype_to_precision,
duk_bi_number_prototype_to_string,
duk_bi_number_prototype_value_of,
duk_bi_object_constructor,
duk_bi_object_constructor_create,
duk_bi_object_constructor_define_properties,
duk_bi_object_constructor_define_property,
duk_bi_object_constructor_get_own_property_descriptor,
duk_bi_object_constructor_is_extensible,
duk_bi_object_constructor_is_sealed_frozen_shared,
duk_bi_object_constructor_keys_shared,
duk_bi_object_constructor_prevent_extensions,
duk_bi_object_constructor_seal_freeze_shared,
duk_bi_object_getprototype_shared,
duk_bi_object_prototype_has_own_property,
duk_bi_object_prototype_is_prototype_of,
duk_bi_object_prototype_property_is_enumerable,
duk_bi_object_prototype_to_locale_string,
duk_bi_object_prototype_to_string,
duk_bi_object_prototype_value_of,
duk_bi_object_setprototype_shared,
duk_bi_pointer_constructor,
duk_bi_pointer_prototype_tostring_shared,
duk_bi_proxy_constructor,
duk_bi_regexp_constructor,
duk_bi_regexp_prototype_exec,
duk_bi_regexp_prototype_test,
duk_bi_regexp_prototype_to_string,
duk_bi_string_constructor,
duk_bi_string_constructor_from_char_code,
duk_bi_string_prototype_caseconv_shared,
duk_bi_string_prototype_char_at,
duk_bi_string_prototype_char_code_at,
duk_bi_string_prototype_concat,
duk_bi_string_prototype_indexof_shared,
duk_bi_string_prototype_locale_compare,
duk_bi_string_prototype_match,
duk_bi_string_prototype_replace,
duk_bi_string_prototype_search,
duk_bi_string_prototype_slice,
duk_bi_string_prototype_split,
duk_bi_string_prototype_substr,
duk_bi_string_prototype_substring,
duk_bi_string_prototype_to_string,
duk_bi_string_prototype_trim,
duk_bi_thread_constructor,
duk_bi_thread_current,
duk_bi_thread_resume,
duk_bi_thread_yield,
duk_bi_type_error_thrower,
duk_bi_typedarray_constructor,
duk_bi_typedarray_set,
};
#if defined(DUK_USE_BUILTIN_INITJS)
DUK_INTERNAL const duk_uint8_t duk_initjs_data[187] = {
40,102,117,110,99,116,105,111,110,40,100,44,97,41,123,102,117,110,99,116,
105,111,110,32,98,40,97,44,98,44,99,41,123,79,98,106,101,99,116,46,100,101,
102,105,110,101,80,114,111,112,101,114,116,121,40,97,44,98,44,123,118,97,
108,117,101,58,99,44,119,114,105,116,97,98,108,101,58,33,48,44,101,110,117,
109,101,114,97,98,108,101,58,33,49,44,99,111,110,102,105,103,117,114,97,98,
108,101,58,33,48,125,41,125,98,40,97,46,76,111,103,103,101,114,44,34,99,
108,111,103,34,44,110,101,119,32,97,46,76,111,103,103,101,114,40,34,67,34,
41,41,59,98,40,97,44,34,109,111,100,76,111,97,100,101,100,34,44,123,125,41,
125,41,40,116,104,105,115,44,68,117,107,116,97,112,101,41,59,10,0,
};
#endif /* DUK_USE_BUILTIN_INITJS */
#if defined(DUK_USE_DOUBLE_LE)
DUK_INTERNAL const duk_uint8_t duk_builtins_data[3833] = {
105,195,75,32,3,148,52,154,248,9,26,13,128,112,105,0,240,22,20,26,95,124,6,
152,52,137,0,120,99,74,239,129,18,70,241,191,2,98,13,79,32,42,88,210,90,2,
240,1,50,141,37,168,76,94,216,118,69,229,203,127,44,0,84,163,73,106,21,75,
14,236,249,98,242,229,191,150,0,46,81,164,181,14,165,151,54,94,89,119,99,
203,23,151,45,252,176,1,146,141,37,168,93,63,59,186,97,241,23,151,45,252,
176,1,178,141,37,168,77,79,60,50,197,229,203,127,44,0,116,163,73,106,17,86,
148,152,188,185,111,229,128,15,148,129,198,137,36,58,166,142,91,251,212,
243,195,44,94,92,183,242,13,79,8,45,14,91,252,121,148,52,199,120,63,72,105,
21,240,118,128,210,237,224,245,17,165,43,224,211,55,231,207,151,148,161,70,
145,0,31,40,107,26,2,18,138,26,228,192,142,0,16,161,174,76,9,74,26,228,192,
158,0,8,161,174,76,10,96,2,42,26,228,192,174,0,26,161,174,76,11,96,3,74,26,
228,192,190,0,44,161,174,76,12,96,3,202,26,228,192,206,0,70,161,169,84,14,
202,3,255,254,32,234,0,0,0,0,0,0,7,195,248,119,0,0,0,0,0,0,3,193,252,57,
136,1,152,32,16,194,0,166,24,6,49,0,57,138,2,12,96,18,99,128,163,32,5,153,
40,76,94,216,118,69,229,203,127,35,41,10,165,135,118,124,177,121,114,223,
200,203,67,169,101,205,151,150,93,216,242,197,229,203,127,35,49,11,167,231,
119,76,62,34,242,229,191,145,154,132,212,243,195,44,94,92,183,242,51,144,
138,180,164,197,229,203,127,35,60,6,26,0,52,208,193,226,117,215,211,15,12,
166,146,11,67,150,255,30,77,24,58,113,64,243,92,8,27,0,68,217,130,70,212,
19,54,224,161,185,5,77,216,44,111,65,115,126,12,28,16,100,225,156,16,32,18,
17,195,15,46,121,100,238,232,136,136,87,12,60,185,229,141,179,126,30,136,
100,130,233,231,59,12,228,34,66,52,243,141,167,118,158,153,80,73,9,201,151,
30,252,153,106,210,146,118,72,150,76,184,247,228,203,86,148,152,123,246,
240,223,187,46,238,135,132,132,229,221,143,126,76,181,105,73,61,36,75,46,
236,123,242,101,171,74,76,61,251,120,111,221,151,119,67,226,65,178,243,199,
135,134,83,242,66,58,238,203,207,30,30,25,81,201,5,225,203,78,238,136,163,
208,92,59,50,242,232,138,62,0,2,38,163,19,255,255,224,142,80,192,0,20,31,
240,14,135,103,203,210,135,45,253,55,244,243,195,44,252,205,197,0,1,18,221,
82,0,3,24,207,151,164,254,251,168,114,223,195,47,46,158,98,101,231,143,150,
158,29,55,242,104,68,79,62,94,147,251,238,161,203,127,12,188,186,121,157,
135,110,94,109,100,131,99,229,151,15,76,172,168,8,89,217,16,201,151,54,157,
217,104,114,223,195,47,46,154,114,243,102,68,19,158,92,59,27,73,6,205,203,
46,95,89,91,74,0,3,17,225,203,47,108,187,186,69,241,211,46,238,122,119,238,
230,216,72,70,158,116,242,225,217,151,35,81,33,26,121,198,229,191,214,93,
205,69,0,1,134,105,231,23,199,76,187,185,233,197,179,43,73,32,154,242,249,
230,214,80,0,31,255,193,2,38,103,110,117,24,81,115,0,78,228,0,161,208,16,
237,24,121,207,239,186,135,45,252,50,242,233,229,188,144,221,60,232,114,
223,211,127,79,60,50,207,204,224,72,167,14,91,248,101,229,211,204,158,113,
119,117,219,151,150,28,91,50,184,144,40,95,224,0,15,248,64,4,20,78,129,5,
195,195,134,207,38,232,130,99,195,179,97,201,244,19,22,157,217,14,15,130,
135,254,0,48,125,60,224,242,229,135,200,9,1,255,12,2,162,136,112,2,112,80,
128,0,193,177,239,221,143,15,64,35,224,152,20,144,62,27,248,3,2,9,195,175,
61,0,231,208,126,89,123,101,229,207,40,72,32,188,244,105,205,208,40,16,94,
123,52,227,202,22,136,39,61,252,186,6,18,13,207,134,205,56,242,134,175,65,
250,238,231,163,78,110,129,231,208,125,59,178,101,241,63,48,25,248,0,12,47,
102,30,125,36,238,201,151,196,252,192,103,255,255,240,92,189,178,242,242,8,
105,4,231,191,110,80,67,80,0,24,62,109,252,162,225,199,160,16,212,0,10,7,
183,15,0,67,80,0,56,54,109,59,58,101,228,8,106,0,9,6,229,151,39,92,121,66,
15,192,0,97,124,178,228,235,143,45,45,57,244,116,8,63,255,255,10,39,248,0,
195,51,114,223,182,30,140,60,161,239,201,149,248,248,31,241,0,140,80,129,
202,10,49,128,10,35,1,6,199,163,15,40,61,32,9,10,199,163,15,40,123,242,101,
131,210,4,144,108,123,247,99,195,210,8,250,15,167,118,76,190,39,230,131,52,
133,236,195,207,164,157,217,50,248,159,154,12,212,0,6,27,179,126,60,59,50,
195,223,183,134,30,89,97,9,5,219,135,166,61,16,164,131,242,203,195,102,28,
121,97,145,6,231,151,15,44,122,33,201,5,231,179,78,60,177,8,130,243,225,
179,79,72,148,66,121,245,197,207,167,45,59,179,197,162,23,211,124,205,253,
242,242,135,135,158,87,240,68,122,111,153,191,30,29,153,102,111,239,151,
148,60,60,242,191,130,23,211,125,94,28,50,242,135,135,158,87,240,128,0,196,
122,111,153,191,30,29,153,106,240,225,151,148,60,60,242,191,132,0,6,9,211,
150,157,177,160,131,115,235,139,159,78,81,72,10,47,248,0,3,254,40,17,138,
48,66,136,152,64,0,66,129,48,5,27,252,88,76,216,54,47,214,131,50,172,88,31,
255,255,255,255,255,253,239,240,153,178,103,95,173,6,101,88,176,0,64,0,0,0,
0,0,0,3,168,0,0,0,0,0,0,31,15,241,26,19,233,201,169,38,180,91,242,103,70,
147,58,77,75,48,0,0,0,0,0,0,60,31,226,51,162,199,131,82,77,104,183,228,206,
141,38,116,154,150,96,0,0,0,0,0,0,120,127,128,15,248,192,70,40,0,0,0,0,0,0,
0,0,3,10,44,68,9,216,8,20,49,130,15,211,124,109,62,50,228,95,36,55,166,248,
190,56,111,221,151,119,77,56,118,47,18,23,211,125,14,89,113,233,231,167,
126,230,18,5,31,252,0,224,188,48,242,231,148,116,144,58,181,33,143,127,64,
247,111,238,56,0,127,199,2,49,72,0,0,0,0,0,0,248,127,180,81,36,4,51,166,
248,152,122,101,167,211,150,157,217,201,2,0,3,12,233,190,166,157,185,105,
244,229,167,118,114,64,128,1,4,228,129,0,3,137,116,223,51,126,60,59,50,196,
195,211,45,62,156,180,238,206,72,16,0,72,151,77,243,55,227,195,179,45,77,
59,114,211,233,203,78,236,228,129,0,5,10,73,2,0,12,21,18,4,0,28,82,35,32,
80,74,8,62,124,189,42,105,219,148,148,16,188,249,122,70,235,179,101,156,
184,121,15,132,0,34,29,159,47,74,181,33,198,235,179,101,156,184,121,15,132,
0,38,17,159,47,73,187,247,116,208,62,16,0,168,94,124,189,42,212,135,55,126,
238,154,7,194,0,23,7,207,151,164,76,61,50,143,132,0,50,21,159,47,74,181,33,
196,195,211,40,248,64,3,96,217,242,244,137,135,200,248,64,3,161,57,242,244,
171,82,28,76,62,71,194,0,31,8,207,151,164,141,253,121,115,31,8,0,132,47,62,
94,149,106,67,145,191,175,46,99,225,0,17,133,103,203,210,110,157,221,122,
101,230,62,16,1,40,110,124,189,42,212,135,55,78,238,189,50,243,31,8,0,156,
43,62,94,148,242,227,223,187,39,49,240,128,10,67,115,229,233,86,164,58,121,
113,239,221,147,152,248,64,5,97,249,242,244,155,167,102,205,60,242,227,223,
187,39,49,240,128,11,68,179,229,233,86,164,57,186,118,108,211,207,46,61,
251,178,115,31,8,0,188,71,62,94,149,52,237,203,235,126,236,179,243,102,231,
151,161,0,32,252,242,244,169,167,110,82,34,67,249,229,233,55,78,205,154,
121,229,199,191,118,78,100,37,0,24,137,115,203,210,173,72,115,116,236,217,
167,158,92,123,247,100,230,66,80,1,152,87,60,189,41,229,199,191,118,78,100,
43,224,3,80,222,121,122,85,169,14,158,92,123,247,100,230,66,190,0,55,10,
231,151,164,221,59,186,244,203,204,133,252,0,114,27,207,47,74,181,33,205,
211,187,175,76,188,200,95,192,7,97,28,242,244,145,191,175,46,100,51,224,3,
208,190,121,122,85,169,14,70,254,188,185,144,207,128,15,193,249,229,233,19,
15,76,164,37,0,32,133,115,203,210,173,72,113,48,244,202,66,80,2,24,71,60,
189,38,239,221,211,65,10,248,1,20,47,158,94,149,106,67,155,191,119,77,4,43,
224,4,112,190,121,122,70,235,179,101,156,184,121,16,191,128,18,67,185,229,
233,86,164,56,221,118,108,179,151,15,34,23,240,2,88,62,124,189,44,229,195,
200,124,32,4,208,126,121,122,89,203,135,145,9,64,9,194,145,254,0,0,255,144,
24,100,130,14,0,16,176,2,192,129,11,33,12,1,168,193,108,96,186,48,95,32,0,
0,0,0,0,0,0,0,56,38,95,25,113,189,18,9,211,47,62,143,100,20,95,0,20,159,
240,0,7,252,144,162,241,2,195,66,7,11,89,204,140,197,252,229,197,226,230,
115,3,16,69,19,64,5,43,252,0,9,255,40,16,188,33,49,123,97,217,23,151,45,
252,131,66,7,0,20,191,240,0,39,252,176,66,240,133,82,195,187,62,88,188,185,
111,228,26,16,56,0,166,127,128,1,63,230,2,23,132,58,150,92,217,121,101,221,
143,44,94,92,183,242,13,8,28,0,83,127,192,0,159,243,65,11,194,23,79,206,
238,152,124,69,229,203,127,32,208,129,192,5,59,252,0,9,255,56,16,188,33,53,
60,240,203,23,151,45,252,131,66,7,0,20,255,240,0,39,252,240,66,240,132,85,
165,38,47,46,91,249,6,132,14,0,31,255,228,64,98,192,105,87,20,139,10,191,5,
64,130,76,156,197,132,1,101,91,91,187,22,176,36,8,28,201,204,160,119,156,
253,127,33,23,115,31,193,102,79,142,202,44,15,232,34,182,84,113,95,115,248,
52,201,241,216,176,139,0,59,148,152,85,239,47,108,254,5,66,76,1,130,212,69,
79,178,16,148,8,61,58,52,170,49,190,202,6,105,219,251,52,245,7,49,252,22,
157,26,85,25,64,205,59,127,102,158,160,246,63,74,7,135,23,53,2,65,48,227,
223,205,64,160,0,48,76,60,244,238,80,40,0,20,19,15,76,59,148,10,0,7,5,195,
211,14,230,74,72,130,99,203,167,98,129,64,1,32,120,247,243,80,40,0,44,15,
47,142,10,5,0,6,130,230,217,191,127,37,2,128,3,192,246,111,206,160,80,0,
136,30,220,62,19,151,160,123,116,238,79,94,129,240,223,221,73,32,0,48,110,
88,119,100,223,181,68,16,94,91,250,238,200,160,80,0,152,31,61,59,148,10,0,
21,4,231,199,151,69,2,128,5,192,250,97,220,160,80,0,192,127,255,128,20,23,
134,30,92,242,164,34,19,207,167,45,59,179,233,205,229,37,129,127,255,0,0,
191,255,128,0,63,255,197,131,246,203,203,158,157,251,160,0,0,0,0,64,65,98,
32,3,166,156,30,53,32,249,165,131,76,223,159,62,94,70,172,114,16,176,144,
60,56,250,19,18,5,159,25,89,32,121,180,238,42,30,129,229,221,140,164,122,7,
147,46,50,129,232,62,61,251,120,97,199,208,156,129,83,127,0,50,250,69,3,
252,131,32,248,250,242,229,151,119,72,240,3,254,148,0,2,168,254,0,0,255,
167,0,33,68,88,32,0,33,64,176,2,170,254,0,0,255,169,0,33,69,220,32,0,33,67,
184,2,172,254,0,0,255,171,8,137,144,0,0,0,0,0,0,0,128,68,73,4,195,187,126,
226,8,4,178,16,41,164,32,147,7,136,52,193,240,0,18,17,48,124,0,8,133,76,31,
0,3,33,147,7,192,1,8,116,193,240,0,82,127,255,132,47,65,11,137,191,174,45,
153,98,242,229,191,144,105,4,95,47,46,91,249,32,211,185,6,94,92,183,242,65,
163,14,236,155,52,238,206,0,85,255,192,6,13,167,157,109,57,123,136,144,31,
245,192,3,5,231,179,78,60,163,9,0,2,10,199,248,0,3,254,192,4,32,249,242,
244,147,187,163,129,116,128,24,66,51,229,233,87,78,238,142,5,210,0,65,8,
207,151,164,157,221,24,182,23,72,1,140,39,62,94,149,116,238,232,197,176,
186,64,8,97,25,242,244,147,187,163,54,66,233,0,50,132,231,203,210,174,157,
221,25,178,23,72,1,20,43,62,94,145,182,111,195,209,155,33,116,128,17,194,
179,229,233,27,102,252,61,27,52,23,72,1,36,31,158,94,146,119,116,112,50,
208,3,8,71,60,189,42,233,221,209,192,203,64,8,33,28,242,244,147,187,163,22,
195,45,0,49,132,243,203,210,174,157,221,24,182,25,104,1,12,35,158,94,146,
119,116,102,200,101,160,6,80,158,121,122,85,211,187,163,54,67,45,0,34,133,
115,203,210,54,205,248,122,51,100,50,208,2,56,87,60,189,35,108,223,135,163,
102,131,45,0,36,7,255,248,1,11,50,136,132,115,235,139,15,46,88,124,140,36,
0,4,43,79,224,139,16,0,0,0,0,0,0,60,15,192,101,253,152,0,5,109,252,17,98,0,
0,0,0,0,0,7,129,248,12,191,181,0,0,174,63,130,44,64,0,0,0,0,0,0,240,63,1,
151,246,224,0,21,215,240,69,136,0,0,0,0,0,0,0,8,0,50,254,228,0,2,188,254,8,
177,0,0,0,0,0,0,0,1,0,6,95,221,128,0,87,223,193,22,32,0,0,0,0,0,0,8,32,0,
203,251,208,0,11,3,248,34,196,0,0,0,0,0,0,1,4,0,25,127,126,0,1,97,127,4,88,
128,0,0,0,0,0,0,32,128,3,47,240,64,0,44,79,224,139,16,0,0,0,0,0,0,8,16,0,
101,254,24,0,5,141,252,1,96,216,247,238,199,135,162,162,33,90,121,197,221,
143,126,77,59,179,172,146,17,167,156,46,185,179,101,228,176,65,89,77,16,
124,123,246,240,195,203,40,162,64,0,193,255,138,5,144,158,89,112,228,171,
39,119,71,2,232,132,114,203,135,36,157,221,28,11,164,0,66,25,203,46,28,149,
100,238,232,197,180,200,162,233,0,1,134,114,203,135,37,89,59,186,49,109,10,
40,186,64,2,97,124,178,225,201,39,119,70,45,166,69,23,72,0,140,47,150,92,
57,36,238,232,197,180,40,162,233,0,25,134,114,203,135,37,89,59,186,51,101,
50,40,186,64,0,161,156,178,225,201,86,78,238,140,217,66,138,46,144,0,168,
95,44,184,114,73,221,209,155,41,145,69,210,0,37,11,229,151,14,73,59,186,51,
101,10,40,186,64,6,161,124,178,225,201,27,102,252,61,38,69,23,72,0,28,47,
150,92,57,35,108,223,135,164,40,162,233,0,11,134,114,203,135,36,77,253,113,
108,203,50,40,186,64,1,33,156,178,225,201,19,127,92,91,50,194,138,46,144,0,
200,87,44,184,114,85,147,187,164,200,162,237,0,5,133,114,203,135,37,89,59,
186,66,138,46,208,0,216,79,44,184,114,73,221,210,100,81,118,128,10,194,121,
101,195,146,78,238,144,162,139,180,0,118,21,223,150,158,153,106,201,221,
209,192,203,33,61,249,105,233,150,78,238,142,6,90,0,33,13,239,203,79,76,
181,100,238,232,197,180,200,163,45,0,1,134,247,229,167,166,90,178,119,116,
98,218,20,81,150,128,4,195,59,242,211,211,44,157,221,24,182,153,20,101,160,
2,48,206,252,180,244,203,39,119,70,45,161,69,25,104,0,204,55,191,45,61,50,
213,147,187,163,54,83,34,140,180,0,10,27,223,150,158,153,106,201,221,209,
155,40,81,70,90,0,21,12,239,203,79,76,178,119,116,102,202,100,81,150,128,9,
67,59,242,211,211,44,157,221,25,178,133,20,101,160,3,80,206,252,180,244,
203,27,102,252,61,38,69,25,104,0,28,51,191,45,61,50,198,217,191,15,72,81,
70,90,0,23,13,239,203,79,76,177,55,245,197,179,44,200,163,45,0,4,134,247,
229,167,166,88,155,250,226,217,150,20,81,150,128,6,66,251,242,211,211,45,
89,59,186,76,138,51,16,0,88,95,126,90,122,101,171,39,119,72,81,70,98,0,27,
10,239,203,79,76,178,119,116,153,20,102,32,2,176,174,252,180,244,203,39,
119,72,81,70,98,0,58,40,173,176,82,90,4,19,54,157,155,21,217,6,203,199,174,
29,156,197,9,7,199,191,111,12,60,178,138,20,0,6,9,143,127,15,42,208,130,
243,217,167,30,81,132,65,123,242,211,211,42,228,0,
};
#elif defined(DUK_USE_DOUBLE_BE)
DUK_INTERNAL const duk_uint8_t duk_builtins_data[3833] = {
105,195,75,32,3,148,52,154,248,9,26,13,128,112,105,0,240,22,20,26,95,124,6,
152,52,137,0,120,99,74,239,129,18,70,241,191,2,98,13,79,32,42,88,210,90,2,
240,1,50,141,37,168,76,94,216,118,69,229,203,127,44,0,84,163,73,106,21,75,
14,236,249,98,242,229,191,150,0,46,81,164,181,14,165,151,54,94,89,119,99,
203,23,151,45,252,176,1,146,141,37,168,93,63,59,186,97,241,23,151,45,252,
176,1,178,141,37,168,77,79,60,50,197,229,203,127,44,0,116,163,73,106,17,86,
148,152,188,185,111,229,128,15,148,129,198,137,36,58,166,142,91,251,212,
243,195,44,94,92,183,242,13,79,8,45,14,91,252,121,148,52,199,120,63,72,105,
21,240,118,128,210,237,224,245,17,165,43,224,211,55,231,207,151,148,161,70,
145,0,31,40,107,26,2,18,138,26,228,192,142,0,16,161,174,76,9,74,26,228,192,
158,0,8,161,174,76,10,96,2,42,26,228,192,174,0,26,161,174,76,11,96,3,74,26,
228,192,190,0,44,161,174,76,12,96,3,202,26,228,192,206,0,70,161,169,84,14,
202,3,255,254,32,234,3,255,192,0,0,0,0,0,0,119,1,255,192,0,0,0,0,0,0,57,
136,1,152,32,16,194,0,166,24,6,49,0,57,138,2,12,96,18,99,128,163,32,5,153,
40,76,94,216,118,69,229,203,127,35,41,10,165,135,118,124,177,121,114,223,
200,203,67,169,101,205,151,150,93,216,242,197,229,203,127,35,49,11,167,231,
119,76,62,34,242,229,191,145,154,132,212,243,195,44,94,92,183,242,51,144,
138,180,164,197,229,203,127,35,60,6,26,0,52,208,193,226,117,215,211,15,12,
166,146,11,67,150,255,30,77,24,58,113,64,243,92,8,27,0,68,217,130,70,212,
19,54,224,161,185,5,77,216,44,111,65,115,126,12,28,16,100,225,156,16,32,18,
17,195,15,46,121,100,238,232,136,136,87,12,60,185,229,141,179,126,30,136,
100,130,233,231,59,12,228,34,66,52,243,141,167,118,158,153,80,73,9,201,151,
30,252,153,106,210,146,118,72,150,76,184,247,228,203,86,148,152,123,246,
240,223,187,46,238,135,132,132,229,221,143,126,76,181,105,73,61,36,75,46,
236,123,242,101,171,74,76,61,251,120,111,221,151,119,67,226,65,178,243,199,
135,134,83,242,66,58,238,203,207,30,30,25,81,201,5,225,203,78,238,136,163,
208,92,59,50,242,232,138,62,0,2,38,163,19,255,255,224,142,80,192,0,20,31,
240,14,135,103,203,210,135,45,253,55,244,243,195,44,252,205,197,0,1,18,221,
82,0,3,24,207,151,164,254,251,168,114,223,195,47,46,158,98,101,231,143,150,
158,29,55,242,104,68,79,62,94,147,251,238,161,203,127,12,188,186,121,157,
135,110,94,109,100,131,99,229,151,15,76,172,168,8,89,217,16,201,151,54,157,
217,104,114,223,195,47,46,154,114,243,102,68,19,158,92,59,27,73,6,205,203,
46,95,89,91,74,0,3,17,225,203,47,108,187,186,69,241,211,46,238,122,119,238,
230,216,72,70,158,116,242,225,217,151,35,81,33,26,121,198,229,191,214,93,
205,69,0,1,134,105,231,23,199,76,187,185,233,197,179,43,73,32,154,242,249,
230,214,80,0,31,255,193,2,38,103,110,117,24,81,115,0,78,228,0,161,208,16,
237,24,121,207,239,186,135,45,252,50,242,233,229,188,144,221,60,232,114,
223,211,127,79,60,50,207,204,224,72,167,14,91,248,101,229,211,204,158,113,
119,117,219,151,150,28,91,50,184,144,40,95,224,0,15,248,64,4,20,78,129,5,
195,195,134,207,38,232,130,99,195,179,97,201,244,19,22,157,217,14,15,130,
135,254,0,48,125,60,224,242,229,135,200,9,1,255,12,2,162,136,112,2,112,80,
128,0,193,177,239,221,143,15,64,35,224,152,20,144,62,27,248,3,2,9,195,175,
61,0,231,208,126,89,123,101,229,207,40,72,32,188,244,105,205,208,40,16,94,
123,52,227,202,22,136,39,61,252,186,6,18,13,207,134,205,56,242,134,175,65,
250,238,231,163,78,110,129,231,208,125,59,178,101,241,63,48,25,248,0,12,47,
102,30,125,36,238,201,151,196,252,192,103,255,255,240,92,189,178,242,242,8,
105,4,231,191,110,80,67,80,0,24,62,109,252,162,225,199,160,16,212,0,10,7,
183,15,0,67,80,0,56,54,109,59,58,101,228,8,106,0,9,6,229,151,39,92,121,66,
15,192,0,97,124,178,228,235,143,45,45,57,244,116,8,63,255,255,10,39,248,0,
195,51,114,223,182,30,140,60,161,239,201,149,248,248,31,241,0,140,80,129,
202,10,49,128,10,35,1,6,199,163,15,40,61,32,9,10,199,163,15,40,123,242,101,
131,210,4,144,108,123,247,99,195,210,8,250,15,167,118,76,190,39,230,131,52,
133,236,195,207,164,157,217,50,248,159,154,12,212,0,6,27,179,126,60,59,50,
195,223,183,134,30,89,97,9,5,219,135,166,61,16,164,131,242,203,195,102,28,
121,97,145,6,231,151,15,44,122,33,201,5,231,179,78,60,177,8,130,243,225,
179,79,72,148,66,121,245,197,207,167,45,59,179,197,162,23,211,124,205,253,
242,242,135,135,158,87,240,68,122,111,153,191,30,29,153,102,111,239,151,
148,60,60,242,191,130,23,211,125,94,28,50,242,135,135,158,87,240,128,0,196,
122,111,153,191,30,29,153,106,240,225,151,148,60,60,242,191,132,0,6,9,211,
150,157,177,160,131,115,235,139,159,78,81,72,10,47,248,0,3,254,40,17,138,
48,66,136,152,64,0,66,129,48,5,27,252,88,76,216,54,47,214,131,50,172,88,15,
253,255,255,255,255,255,255,240,153,178,103,95,173,6,101,88,176,0,0,0,0,0,
0,0,0,67,168,15,255,0,0,0,0,0,0,17,26,19,233,201,169,38,180,91,242,103,70,
147,58,77,75,48,31,252,0,0,0,0,0,0,34,51,162,199,131,82,77,104,183,228,206,
141,38,116,154,150,96,127,248,0,0,0,0,0,0,0,15,248,192,70,40,0,0,0,0,0,0,0,
0,3,10,44,68,9,216,8,20,49,130,15,211,124,109,62,50,228,95,36,55,166,248,
190,56,111,221,151,119,77,56,118,47,18,23,211,125,14,89,113,233,231,167,
126,230,18,5,31,252,0,224,188,48,242,231,148,116,144,58,181,33,143,127,64,
247,111,238,56,0,127,199,2,49,72,127,248,0,0,0,0,0,0,180,81,36,4,51,166,
248,152,122,101,167,211,150,157,217,201,2,0,3,12,233,190,166,157,185,105,
244,229,167,118,114,64,128,1,4,228,129,0,3,137,116,223,51,126,60,59,50,196,
195,211,45,62,156,180,238,206,72,16,0,72,151,77,243,55,227,195,179,45,77,
59,114,211,233,203,78,236,228,129,0,5,10,73,2,0,12,21,18,4,0,28,82,35,32,
80,74,8,62,124,189,42,105,219,148,148,16,188,249,122,70,235,179,101,156,
184,121,15,132,0,34,29,159,47,74,181,33,198,235,179,101,156,184,121,15,132,
0,38,17,159,47,73,187,247,116,208,62,16,0,168,94,124,189,42,212,135,55,126,
238,154,7,194,0,23,7,207,151,164,76,61,50,143,132,0,50,21,159,47,74,181,33,
196,195,211,40,248,64,3,96,217,242,244,137,135,200,248,64,3,161,57,242,244,
171,82,28,76,62,71,194,0,31,8,207,151,164,141,253,121,115,31,8,0,132,47,62,
94,149,106,67,145,191,175,46,99,225,0,17,133,103,203,210,110,157,221,122,
101,230,62,16,1,40,110,124,189,42,212,135,55,78,238,189,50,243,31,8,0,156,
43,62,94,148,242,227,223,187,39,49,240,128,10,67,115,229,233,86,164,58,121,
113,239,221,147,152,248,64,5,97,249,242,244,155,167,102,205,60,242,227,223,
187,39,49,240,128,11,68,179,229,233,86,164,57,186,118,108,211,207,46,61,
251,178,115,31,8,0,188,71,62,94,149,52,237,203,235,126,236,179,243,102,231,
151,161,0,32,252,242,244,169,167,110,82,34,67,249,229,233,55,78,205,154,
121,229,199,191,118,78,100,37,0,24,137,115,203,210,173,72,115,116,236,217,
167,158,92,123,247,100,230,66,80,1,152,87,60,189,41,229,199,191,118,78,100,
43,224,3,80,222,121,122,85,169,14,158,92,123,247,100,230,66,190,0,55,10,
231,151,164,221,59,186,244,203,204,133,252,0,114,27,207,47,74,181,33,205,
211,187,175,76,188,200,95,192,7,97,28,242,244,145,191,175,46,100,51,224,3,
208,190,121,122,85,169,14,70,254,188,185,144,207,128,15,193,249,229,233,19,
15,76,164,37,0,32,133,115,203,210,173,72,113,48,244,202,66,80,2,24,71,60,
189,38,239,221,211,65,10,248,1,20,47,158,94,149,106,67,155,191,119,77,4,43,
224,4,112,190,121,122,70,235,179,101,156,184,121,16,191,128,18,67,185,229,
233,86,164,56,221,118,108,179,151,15,34,23,240,2,88,62,124,189,44,229,195,
200,124,32,4,208,126,121,122,89,203,135,145,9,64,9,194,145,254,0,0,255,144,
24,100,130,14,0,16,176,2,192,129,11,33,12,1,168,193,108,96,186,48,95,32,0,
0,0,0,0,0,0,0,56,38,95,25,113,189,18,9,211,47,62,143,100,20,95,0,20,159,
240,0,7,252,144,162,241,2,195,66,7,11,89,204,140,197,252,229,197,226,230,
115,3,16,69,19,64,5,43,252,0,9,255,40,16,188,33,49,123,97,217,23,151,45,
252,131,66,7,0,20,191,240,0,39,252,176,66,240,133,82,195,187,62,88,188,185,
111,228,26,16,56,0,166,127,128,1,63,230,2,23,132,58,150,92,217,121,101,221,
143,44,94,92,183,242,13,8,28,0,83,127,192,0,159,243,65,11,194,23,79,206,
238,152,124,69,229,203,127,32,208,129,192,5,59,252,0,9,255,56,16,188,33,53,
60,240,203,23,151,45,252,131,66,7,0,20,255,240,0,39,252,240,66,240,132,85,
165,38,47,46,91,249,6,132,14,0,31,255,228,64,98,192,64,5,191,10,139,20,87,
105,130,76,156,197,132,4,0,38,187,27,187,85,81,104,28,201,204,160,31,243,
23,33,127,125,28,247,193,102,79,142,202,44,3,255,113,84,118,82,184,47,232,
52,201,241,216,176,139,0,255,111,45,236,84,155,148,58,5,66,76,4,0,146,31,
181,68,66,209,136,61,58,52,170,49,190,202,1,255,53,4,243,51,249,222,108,22,
157,26,85,25,64,63,246,160,158,102,127,59,205,74,7,135,23,53,2,65,48,227,
223,205,64,160,0,48,76,60,244,238,80,40,0,20,19,15,76,59,148,10,0,7,5,195,
211,14,230,74,72,130,99,203,167,98,129,64,1,32,120,247,243,80,40,0,44,15,
47,142,10,5,0,6,130,230,217,191,127,37,2,128,3,192,246,111,206,160,80,0,
136,30,220,62,19,151,160,123,116,238,79,94,129,240,223,221,73,32,0,48,110,
88,119,100,223,181,68,16,94,91,250,238,200,160,80,0,152,31,61,59,148,10,0,
21,4,231,199,151,69,2,128,5,192,250,97,220,160,80,0,192,127,255,128,20,23,
134,30,92,242,164,34,19,207,167,45,59,179,233,205,229,37,129,127,255,0,0,
191,255,128,0,63,255,197,131,246,203,203,158,157,251,160,32,98,65,64,0,0,0,
0,3,166,156,30,53,32,249,165,131,76,223,159,62,94,70,172,114,16,176,144,60,
56,250,19,18,5,159,25,89,32,121,180,238,42,30,129,229,221,140,164,122,7,
147,46,50,129,232,62,61,251,120,97,199,208,156,129,83,127,0,50,250,69,3,
252,131,32,248,250,242,229,151,119,72,240,3,254,148,0,2,168,254,0,0,255,
167,0,33,68,88,32,0,33,64,176,2,170,254,0,0,255,169,0,33,69,220,32,0,33,67,
184,2,172,254,0,0,255,171,8,137,144,128,0,0,0,0,0,0,0,68,73,4,195,187,126,
226,8,4,178,16,41,164,32,147,7,136,52,193,240,0,18,17,48,124,0,8,133,76,31,
0,3,33,147,7,192,1,8,116,193,240,0,82,127,255,132,47,65,11,137,191,174,45,
153,98,242,229,191,144,105,4,95,47,46,91,249,32,211,185,6,94,92,183,242,65,
163,14,236,155,52,238,206,0,85,255,192,6,13,167,157,109,57,123,136,144,31,
245,192,3,5,231,179,78,60,163,9,0,2,10,199,248,0,3,254,192,4,32,249,242,
244,147,187,163,129,116,128,24,66,51,229,233,87,78,238,142,5,210,0,65,8,
207,151,164,157,221,24,182,23,72,1,140,39,62,94,149,116,238,232,197,176,
186,64,8,97,25,242,244,147,187,163,54,66,233,0,50,132,231,203,210,174,157,
221,25,178,23,72,1,20,43,62,94,145,182,111,195,209,155,33,116,128,17,194,
179,229,233,27,102,252,61,27,52,23,72,1,36,31,158,94,146,119,116,112,50,
208,3,8,71,60,189,42,233,221,209,192,203,64,8,33,28,242,244,147,187,163,22,
195,45,0,49,132,243,203,210,174,157,221,24,182,25,104,1,12,35,158,94,146,
119,116,102,200,101,160,6,80,158,121,122,85,211,187,163,54,67,45,0,34,133,
115,203,210,54,205,248,122,51,100,50,208,2,56,87,60,189,35,108,223,135,163,
102,131,45,0,36,7,255,248,1,11,50,136,132,115,235,139,15,46,88,124,140,36,
0,4,43,79,224,139,16,15,252,0,0,0,0,0,0,0,101,253,152,0,5,109,252,17,98,1,
255,128,0,0,0,0,0,0,12,191,181,0,0,174,63,130,44,64,63,240,0,0,0,0,0,0,1,
151,246,224,0,21,215,240,69,136,8,0,0,0,0,0,0,0,0,50,254,228,0,2,188,254,8,
177,1,0,0,0,0,0,0,0,0,6,95,221,128,0,87,223,193,22,32,32,8,0,0,0,0,0,0,0,
203,251,208,0,11,3,248,34,196,4,1,0,0,0,0,0,0,0,25,127,126,0,1,97,127,4,88,
128,128,32,0,0,0,0,0,0,3,47,240,64,0,44,79,224,139,16,16,8,0,0,0,0,0,0,0,
101,254,24,0,5,141,252,1,96,216,247,238,199,135,162,162,33,90,121,197,221,
143,126,77,59,179,172,146,17,167,156,46,185,179,101,228,176,65,89,77,16,
124,123,246,240,195,203,40,162,64,0,193,255,138,5,144,158,89,112,228,171,
39,119,71,2,232,132,114,203,135,36,157,221,28,11,164,0,66,25,203,46,28,149,
100,238,232,197,180,200,162,233,0,1,134,114,203,135,37,89,59,186,49,109,10,
40,186,64,2,97,124,178,225,201,39,119,70,45,166,69,23,72,0,140,47,150,92,
57,36,238,232,197,180,40,162,233,0,25,134,114,203,135,37,89,59,186,51,101,
50,40,186,64,0,161,156,178,225,201,86,78,238,140,217,66,138,46,144,0,168,
95,44,184,114,73,221,209,155,41,145,69,210,0,37,11,229,151,14,73,59,186,51,
101,10,40,186,64,6,161,124,178,225,201,27,102,252,61,38,69,23,72,0,28,47,
150,92,57,35,108,223,135,164,40,162,233,0,11,134,114,203,135,36,77,253,113,
108,203,50,40,186,64,1,33,156,178,225,201,19,127,92,91,50,194,138,46,144,0,
200,87,44,184,114,85,147,187,164,200,162,237,0,5,133,114,203,135,37,89,59,
186,66,138,46,208,0,216,79,44,184,114,73,221,210,100,81,118,128,10,194,121,
101,195,146,78,238,144,162,139,180,0,118,21,223,150,158,153,106,201,221,
209,192,203,33,61,249,105,233,150,78,238,142,6,90,0,33,13,239,203,79,76,
181,100,238,232,197,180,200,163,45,0,1,134,247,229,167,166,90,178,119,116,
98,218,20,81,150,128,4,195,59,242,211,211,44,157,221,24,182,153,20,101,160,
2,48,206,252,180,244,203,39,119,70,45,161,69,25,104,0,204,55,191,45,61,50,
213,147,187,163,54,83,34,140,180,0,10,27,223,150,158,153,106,201,221,209,
155,40,81,70,90,0,21,12,239,203,79,76,178,119,116,102,202,100,81,150,128,9,
67,59,242,211,211,44,157,221,25,178,133,20,101,160,3,80,206,252,180,244,
203,27,102,252,61,38,69,25,104,0,28,51,191,45,61,50,198,217,191,15,72,81,
70,90,0,23,13,239,203,79,76,177,55,245,197,179,44,200,163,45,0,4,134,247,
229,167,166,88,155,250,226,217,150,20,81,150,128,6,66,251,242,211,211,45,
89,59,186,76,138,51,16,0,88,95,126,90,122,101,171,39,119,72,81,70,98,0,27,
10,239,203,79,76,178,119,116,153,20,102,32,2,176,174,252,180,244,203,39,
119,72,81,70,98,0,58,40,173,176,82,90,4,19,54,157,155,21,217,6,203,199,174,
29,156,197,9,7,199,191,111,12,60,178,138,20,0,6,9,143,127,15,42,208,130,
243,217,167,30,81,132,65,123,242,211,211,42,228,0,
};
#elif defined(DUK_USE_DOUBLE_ME)
DUK_INTERNAL const duk_uint8_t duk_builtins_data[3833] = {
105,195,75,32,3,148,52,154,248,9,26,13,128,112,105,0,240,22,20,26,95,124,6,
152,52,137,0,120,99,74,239,129,18,70,241,191,2,98,13,79,32,42,88,210,90,2,
240,1,50,141,37,168,76,94,216,118,69,229,203,127,44,0,84,163,73,106,21,75,
14,236,249,98,242,229,191,150,0,46,81,164,181,14,165,151,54,94,89,119,99,
203,23,151,45,252,176,1,146,141,37,168,93,63,59,186,97,241,23,151,45,252,
176,1,178,141,37,168,77,79,60,50,197,229,203,127,44,0,116,163,73,106,17,86,
148,152,188,185,111,229,128,15,148,129,198,137,36,58,166,142,91,251,212,
243,195,44,94,92,183,242,13,79,8,45,14,91,252,121,148,52,199,120,63,72,105,
21,240,118,128,210,237,224,245,17,165,43,224,211,55,231,207,151,148,161,70,
145,0,31,40,107,26,2,18,138,26,228,192,142,0,16,161,174,76,9,74,26,228,192,
158,0,8,161,174,76,10,96,2,42,26,228,192,174,0,26,161,174,76,11,96,3,74,26,
228,192,190,0,44,161,174,76,12,96,3,202,26,228,192,206,0,70,161,169,84,14,
202,3,255,254,32,234,0,0,7,195,248,0,0,0,0,119,0,0,3,193,252,0,0,0,0,57,
136,1,152,32,16,194,0,166,24,6,49,0,57,138,2,12,96,18,99,128,163,32,5,153,
40,76,94,216,118,69,229,203,127,35,41,10,165,135,118,124,177,121,114,223,
200,203,67,169,101,205,151,150,93,216,242,197,229,203,127,35,49,11,167,231,
119,76,62,34,242,229,191,145,154,132,212,243,195,44,94,92,183,242,51,144,
138,180,164,197,229,203,127,35,60,6,26,0,52,208,193,226,117,215,211,15,12,
166,146,11,67,150,255,30,77,24,58,113,64,243,92,8,27,0,68,217,130,70,212,
19,54,224,161,185,5,77,216,44,111,65,115,126,12,28,16,100,225,156,16,32,18,
17,195,15,46,121,100,238,232,136,136,87,12,60,185,229,141,179,126,30,136,
100,130,233,231,59,12,228,34,66,52,243,141,167,118,158,153,80,73,9,201,151,
30,252,153,106,210,146,118,72,150,76,184,247,228,203,86,148,152,123,246,
240,223,187,46,238,135,132,132,229,221,143,126,76,181,105,73,61,36,75,46,
236,123,242,101,171,74,76,61,251,120,111,221,151,119,67,226,65,178,243,199,
135,134,83,242,66,58,238,203,207,30,30,25,81,201,5,225,203,78,238,136,163,
208,92,59,50,242,232,138,62,0,2,38,163,19,255,255,224,142,80,192,0,20,31,
240,14,135,103,203,210,135,45,253,55,244,243,195,44,252,205,197,0,1,18,221,
82,0,3,24,207,151,164,254,251,168,114,223,195,47,46,158,98,101,231,143,150,
158,29,55,242,104,68,79,62,94,147,251,238,161,203,127,12,188,186,121,157,
135,110,94,109,100,131,99,229,151,15,76,172,168,8,89,217,16,201,151,54,157,
217,104,114,223,195,47,46,154,114,243,102,68,19,158,92,59,27,73,6,205,203,
46,95,89,91,74,0,3,17,225,203,47,108,187,186,69,241,211,46,238,122,119,238,
230,216,72,70,158,116,242,225,217,151,35,81,33,26,121,198,229,191,214,93,
205,69,0,1,134,105,231,23,199,76,187,185,233,197,179,43,73,32,154,242,249,
230,214,80,0,31,255,193,2,38,103,110,117,24,81,115,0,78,228,0,161,208,16,
237,24,121,207,239,186,135,45,252,50,242,233,229,188,144,221,60,232,114,
223,211,127,79,60,50,207,204,224,72,167,14,91,248,101,229,211,204,158,113,
119,117,219,151,150,28,91,50,184,144,40,95,224,0,15,248,64,4,20,78,129,5,
195,195,134,207,38,232,130,99,195,179,97,201,244,19,22,157,217,14,15,130,
135,254,0,48,125,60,224,242,229,135,200,9,1,255,12,2,162,136,112,2,112,80,
128,0,193,177,239,221,143,15,64,35,224,152,20,144,62,27,248,3,2,9,195,175,
61,0,231,208,126,89,123,101,229,207,40,72,32,188,244,105,205,208,40,16,94,
123,52,227,202,22,136,39,61,252,186,6,18,13,207,134,205,56,242,134,175,65,
250,238,231,163,78,110,129,231,208,125,59,178,101,241,63,48,25,248,0,12,47,
102,30,125,36,238,201,151,196,252,192,103,255,255,240,92,189,178,242,242,8,
105,4,231,191,110,80,67,80,0,24,62,109,252,162,225,199,160,16,212,0,10,7,
183,15,0,67,80,0,56,54,109,59,58,101,228,8,106,0,9,6,229,151,39,92,121,66,
15,192,0,97,124,178,228,235,143,45,45,57,244,116,8,63,255,255,10,39,248,0,
195,51,114,223,182,30,140,60,161,239,201,149,248,248,31,241,0,140,80,129,
202,10,49,128,10,35,1,6,199,163,15,40,61,32,9,10,199,163,15,40,123,242,101,
131,210,4,144,108,123,247,99,195,210,8,250,15,167,118,76,190,39,230,131,52,
133,236,195,207,164,157,217,50,248,159,154,12,212,0,6,27,179,126,60,59,50,
195,223,183,134,30,89,97,9,5,219,135,166,61,16,164,131,242,203,195,102,28,
121,97,145,6,231,151,15,44,122,33,201,5,231,179,78,60,177,8,130,243,225,
179,79,72,148,66,121,245,197,207,167,45,59,179,197,162,23,211,124,205,253,
242,242,135,135,158,87,240,68,122,111,153,191,30,29,153,102,111,239,151,
148,60,60,242,191,130,23,211,125,94,28,50,242,135,135,158,87,240,128,0,196,
122,111,153,191,30,29,153,106,240,225,151,148,60,60,242,191,132,0,6,9,211,
150,157,177,160,131,115,235,139,159,78,81,72,10,47,248,0,3,254,40,17,138,
48,66,136,152,64,0,66,129,48,5,27,252,88,76,216,54,47,214,131,50,172,88,31,
255,253,239,255,255,255,255,240,153,178,103,95,173,6,101,88,176,0,0,0,0,0,
64,0,0,3,168,0,0,31,15,224,0,0,0,17,26,19,233,201,169,38,180,91,242,103,70,
147,58,77,75,48,0,0,60,31,192,0,0,0,34,51,162,199,131,82,77,104,183,228,
206,141,38,116,154,150,96,0,0,120,127,128,0,0,0,0,15,248,192,70,40,0,0,0,0,
0,0,0,0,3,10,44,68,9,216,8,20,49,130,15,211,124,109,62,50,228,95,36,55,166,
248,190,56,111,221,151,119,77,56,118,47,18,23,211,125,14,89,113,233,231,
167,126,230,18,5,31,252,0,224,188,48,242,231,148,116,144,58,181,33,143,127,
64,247,111,238,56,0,127,199,2,49,72,0,0,248,127,0,0,0,0,180,81,36,4,51,166,
248,152,122,101,167,211,150,157,217,201,2,0,3,12,233,190,166,157,185,105,
244,229,167,118,114,64,128,1,4,228,129,0,3,137,116,223,51,126,60,59,50,196,
195,211,45,62,156,180,238,206,72,16,0,72,151,77,243,55,227,195,179,45,77,
59,114,211,233,203,78,236,228,129,0,5,10,73,2,0,12,21,18,4,0,28,82,35,32,
80,74,8,62,124,189,42,105,219,148,148,16,188,249,122,70,235,179,101,156,
184,121,15,132,0,34,29,159,47,74,181,33,198,235,179,101,156,184,121,15,132,
0,38,17,159,47,73,187,247,116,208,62,16,0,168,94,124,189,42,212,135,55,126,
238,154,7,194,0,23,7,207,151,164,76,61,50,143,132,0,50,21,159,47,74,181,33,
196,195,211,40,248,64,3,96,217,242,244,137,135,200,248,64,3,161,57,242,244,
171,82,28,76,62,71,194,0,31,8,207,151,164,141,253,121,115,31,8,0,132,47,62,
94,149,106,67,145,191,175,46,99,225,0,17,133,103,203,210,110,157,221,122,
101,230,62,16,1,40,110,124,189,42,212,135,55,78,238,189,50,243,31,8,0,156,
43,62,94,148,242,227,223,187,39,49,240,128,10,67,115,229,233,86,164,58,121,
113,239,221,147,152,248,64,5,97,249,242,244,155,167,102,205,60,242,227,223,
187,39,49,240,128,11,68,179,229,233,86,164,57,186,118,108,211,207,46,61,
251,178,115,31,8,0,188,71,62,94,149,52,237,203,235,126,236,179,243,102,231,
151,161,0,32,252,242,244,169,167,110,82,34,67,249,229,233,55,78,205,154,
121,229,199,191,118,78,100,37,0,24,137,115,203,210,173,72,115,116,236,217,
167,158,92,123,247,100,230,66,80,1,152,87,60,189,41,229,199,191,118,78,100,
43,224,3,80,222,121,122,85,169,14,158,92,123,247,100,230,66,190,0,55,10,
231,151,164,221,59,186,244,203,204,133,252,0,114,27,207,47,74,181,33,205,
211,187,175,76,188,200,95,192,7,97,28,242,244,145,191,175,46,100,51,224,3,
208,190,121,122,85,169,14,70,254,188,185,144,207,128,15,193,249,229,233,19,
15,76,164,37,0,32,133,115,203,210,173,72,113,48,244,202,66,80,2,24,71,60,
189,38,239,221,211,65,10,248,1,20,47,158,94,149,106,67,155,191,119,77,4,43,
224,4,112,190,121,122,70,235,179,101,156,184,121,16,191,128,18,67,185,229,
233,86,164,56,221,118,108,179,151,15,34,23,240,2,88,62,124,189,44,229,195,
200,124,32,4,208,126,121,122,89,203,135,145,9,64,9,194,145,254,0,0,255,144,
24,100,130,14,0,16,176,2,192,129,11,33,12,1,168,193,108,96,186,48,95,32,0,
0,0,0,0,0,0,0,56,38,95,25,113,189,18,9,211,47,62,143,100,20,95,0,20,159,
240,0,7,252,144,162,241,2,195,66,7,11,89,204,140,197,252,229,197,226,230,
115,3,16,69,19,64,5,43,252,0,9,255,40,16,188,33,49,123,97,217,23,151,45,
252,131,66,7,0,20,191,240,0,39,252,176,66,240,133,82,195,187,62,88,188,185,
111,228,26,16,56,0,166,127,128,1,63,230,2,23,132,58,150,92,217,121,101,221,
143,44,94,92,183,242,13,8,28,0,83,127,192,0,159,243,65,11,194,23,79,206,
238,152,124,69,229,203,127,32,208,129,192,5,59,252,0,9,255,56,16,188,33,53,
60,240,203,23,151,45,252,131,66,7,0,20,255,240,0,39,252,240,66,240,132,85,
165,38,47,46,91,249,6,132,14,0,31,255,228,64,98,192,10,191,5,64,105,87,20,
139,130,76,156,197,132,11,22,176,36,1,101,91,91,184,28,201,204,160,33,23,
115,31,247,156,253,127,65,102,79,142,202,44,4,113,95,115,255,232,34,182,88,
52,201,241,216,176,139,1,239,47,108,252,59,148,152,86,5,66,76,15,178,16,
148,1,130,212,69,72,61,58,52,170,49,190,202,4,245,7,49,254,105,219,251,52,
22,157,26,85,25,64,158,160,246,63,205,59,127,102,74,7,135,23,53,2,65,48,
227,223,205,64,160,0,48,76,60,244,238,80,40,0,20,19,15,76,59,148,10,0,7,5,
195,211,14,230,74,72,130,99,203,167,98,129,64,1,32,120,247,243,80,40,0,44,
15,47,142,10,5,0,6,130,230,217,191,127,37,2,128,3,192,246,111,206,160,80,0,
136,30,220,62,19,151,160,123,116,238,79,94,129,240,223,221,73,32,0,48,110,
88,119,100,223,181,68,16,94,91,250,238,200,160,80,0,152,31,61,59,148,10,0,
21,4,231,199,151,69,2,128,5,192,250,97,220,160,80,0,192,127,255,128,20,23,
134,30,92,242,164,34,19,207,167,45,59,179,233,205,229,37,129,127,255,0,0,
191,255,128,0,63,255,197,131,246,203,203,158,157,251,160,64,65,98,32,0,0,0,
0,3,166,156,30,53,32,249,165,131,76,223,159,62,94,70,172,114,16,176,144,60,
56,250,19,18,5,159,25,89,32,121,180,238,42,30,129,229,221,140,164,122,7,
147,46,50,129,232,62,61,251,120,97,199,208,156,129,83,127,0,50,250,69,3,
252,131,32,248,250,242,229,151,119,72,240,3,254,148,0,2,168,254,0,0,255,
167,0,33,68,88,32,0,33,64,176,2,170,254,0,0,255,169,0,33,69,220,32,0,33,67,
184,2,172,254,0,0,255,171,8,137,144,0,0,0,128,0,0,0,0,68,73,4,195,187,126,
226,8,4,178,16,41,164,32,147,7,136,52,193,240,0,18,17,48,124,0,8,133,76,31,
0,3,33,147,7,192,1,8,116,193,240,0,82,127,255,132,47,65,11,137,191,174,45,
153,98,242,229,191,144,105,4,95,47,46,91,249,32,211,185,6,94,92,183,242,65,
163,14,236,155,52,238,206,0,85,255,192,6,13,167,157,109,57,123,136,144,31,
245,192,3,5,231,179,78,60,163,9,0,2,10,199,248,0,3,254,192,4,32,249,242,
244,147,187,163,129,116,128,24,66,51,229,233,87,78,238,142,5,210,0,65,8,
207,151,164,157,221,24,182,23,72,1,140,39,62,94,149,116,238,232,197,176,
186,64,8,97,25,242,244,147,187,163,54,66,233,0,50,132,231,203,210,174,157,
221,25,178,23,72,1,20,43,62,94,145,182,111,195,209,155,33,116,128,17,194,
179,229,233,27,102,252,61,27,52,23,72,1,36,31,158,94,146,119,116,112,50,
208,3,8,71,60,189,42,233,221,209,192,203,64,8,33,28,242,244,147,187,163,22,
195,45,0,49,132,243,203,210,174,157,221,24,182,25,104,1,12,35,158,94,146,
119,116,102,200,101,160,6,80,158,121,122,85,211,187,163,54,67,45,0,34,133,
115,203,210,54,205,248,122,51,100,50,208,2,56,87,60,189,35,108,223,135,163,
102,131,45,0,36,7,255,248,1,11,50,136,132,115,235,139,15,46,88,124,140,36,
0,4,43,79,224,139,16,0,0,60,15,192,0,0,0,0,101,253,152,0,5,109,252,17,98,0,
0,7,129,248,0,0,0,0,12,191,181,0,0,174,63,130,44,64,0,0,240,63,0,0,0,0,1,
151,246,224,0,21,215,240,69,136,0,0,0,8,0,0,0,0,0,50,254,228,0,2,188,254,8,
177,0,0,0,1,0,0,0,0,0,6,95,221,128,0,87,223,193,22,32,0,0,8,32,0,0,0,0,0,
203,251,208,0,11,3,248,34,196,0,0,1,4,0,0,0,0,0,25,127,126,0,1,97,127,4,88,
128,0,0,32,128,0,0,0,0,3,47,240,64,0,44,79,224,139,16,0,0,8,16,0,0,0,0,0,
101,254,24,0,5,141,252,1,96,216,247,238,199,135,162,162,33,90,121,197,221,
143,126,77,59,179,172,146,17,167,156,46,185,179,101,228,176,65,89,77,16,
124,123,246,240,195,203,40,162,64,0,193,255,138,5,144,158,89,112,228,171,
39,119,71,2,232,132,114,203,135,36,157,221,28,11,164,0,66,25,203,46,28,149,
100,238,232,197,180,200,162,233,0,1,134,114,203,135,37,89,59,186,49,109,10,
40,186,64,2,97,124,178,225,201,39,119,70,45,166,69,23,72,0,140,47,150,92,
57,36,238,232,197,180,40,162,233,0,25,134,114,203,135,37,89,59,186,51,101,
50,40,186,64,0,161,156,178,225,201,86,78,238,140,217,66,138,46,144,0,168,
95,44,184,114,73,221,209,155,41,145,69,210,0,37,11,229,151,14,73,59,186,51,
101,10,40,186,64,6,161,124,178,225,201,27,102,252,61,38,69,23,72,0,28,47,
150,92,57,35,108,223,135,164,40,162,233,0,11,134,114,203,135,36,77,253,113,
108,203,50,40,186,64,1,33,156,178,225,201,19,127,92,91,50,194,138,46,144,0,
200,87,44,184,114,85,147,187,164,200,162,237,0,5,133,114,203,135,37,89,59,
186,66,138,46,208,0,216,79,44,184,114,73,221,210,100,81,118,128,10,194,121,
101,195,146,78,238,144,162,139,180,0,118,21,223,150,158,153,106,201,221,
209,192,203,33,61,249,105,233,150,78,238,142,6,90,0,33,13,239,203,79,76,
181,100,238,232,197,180,200,163,45,0,1,134,247,229,167,166,90,178,119,116,
98,218,20,81,150,128,4,195,59,242,211,211,44,157,221,24,182,153,20,101,160,
2,48,206,252,180,244,203,39,119,70,45,161,69,25,104,0,204,55,191,45,61,50,
213,147,187,163,54,83,34,140,180,0,10,27,223,150,158,153,106,201,221,209,
155,40,81,70,90,0,21,12,239,203,79,76,178,119,116,102,202,100,81,150,128,9,
67,59,242,211,211,44,157,221,25,178,133,20,101,160,3,80,206,252,180,244,
203,27,102,252,61,38,69,25,104,0,28,51,191,45,61,50,198,217,191,15,72,81,
70,90,0,23,13,239,203,79,76,177,55,245,197,179,44,200,163,45,0,4,134,247,
229,167,166,88,155,250,226,217,150,20,81,150,128,6,66,251,242,211,211,45,
89,59,186,76,138,51,16,0,88,95,126,90,122,101,171,39,119,72,81,70,98,0,27,
10,239,203,79,76,178,119,116,153,20,102,32,2,176,174,252,180,244,203,39,
119,72,81,70,98,0,58,40,173,176,82,90,4,19,54,157,155,21,217,6,203,199,174,
29,156,197,9,7,199,191,111,12,60,178,138,20,0,6,9,143,127,15,42,208,130,
243,217,167,30,81,132,65,123,242,211,211,42,228,0,
};
#else
#error invalid endianness defines
#endif
#endif /* DUK_USE_ROM_OBJECTS */
#line 1 "duk_error_macros.c"
/*
* Error, fatal, and panic handling.
*/
/* include removed: duk_internal.h */
#define DUK__ERRFMT_BUFSIZE 256 /* size for formatting buffers */
#if defined(DUK_USE_VERBOSE_ERRORS)
DUK_INTERNAL void duk_err_handle_error_fmt(duk_hthread *thr, const char *filename, duk_uint_t line_and_code, const char *fmt, ...) {
va_list ap;
char msg[DUK__ERRFMT_BUFSIZE];
va_start(ap, fmt);
(void) DUK_VSNPRINTF(msg, sizeof(msg), fmt, ap);
msg[sizeof(msg) - 1] = (char) 0;
duk_err_create_and_throw(thr, (duk_errcode_t) (line_and_code >> 24), msg, filename, (duk_int_t) (line_and_code & 0x00ffffffL));
va_end(ap); /* dead code, but ensures portability (see Linux man page notes) */
}
DUK_INTERNAL void duk_err_handle_error(duk_hthread *thr, const char *filename, duk_uint_t line_and_code, const char *msg) {
duk_err_create_and_throw(thr, (duk_errcode_t) (line_and_code >> 24), msg, filename, (duk_int_t) (line_and_code & 0x00ffffffL));
}
#else /* DUK_USE_VERBOSE_ERRORS */
DUK_INTERNAL void duk_err_handle_error(duk_hthread *thr, duk_errcode_t code) {
duk_err_create_and_throw(thr, code);
}
#endif /* DUK_USE_VERBOSE_ERRORS */
/*
* Error throwing helpers
*/
#if defined(DUK_USE_VERBOSE_ERRORS)
#if defined(DUK_USE_PARANOID_ERRORS)
DUK_INTERNAL void duk_err_require_type_index(duk_hthread *thr, const char *filename, duk_int_t linenumber, duk_idx_t index, const char *expect_name) {
DUK_ERROR_RAW_FMT3(thr, filename, linenumber, DUK_ERR_TYPE_ERROR, "%s required, found %s (stack index %ld)",
expect_name, duk_get_type_name((duk_context *) thr, index), (long) index);
}
#else
DUK_INTERNAL void duk_err_require_type_index(duk_hthread *thr, const char *filename, duk_int_t linenumber, duk_idx_t index, const char *expect_name) {
DUK_ERROR_RAW_FMT3(thr, filename, linenumber, DUK_ERR_TYPE_ERROR, "%s required, found %s (stack index %ld)",
expect_name, duk_push_string_readable((duk_context *) thr, index), (long) index);
}
#endif
DUK_INTERNAL void duk_err_range(duk_hthread *thr, const char *filename, duk_int_t linenumber, const char *message) {
DUK_ERROR_RAW(thr, filename, linenumber, DUK_ERR_RANGE_ERROR, message);
}
DUK_INTERNAL void duk_err_api_index(duk_hthread *thr, const char *filename, duk_int_t linenumber, duk_idx_t index) {
DUK_ERROR_RAW_FMT1(thr, filename, linenumber, DUK_ERR_API_ERROR, "invalid stack index %ld", (long) (index));
}
DUK_INTERNAL void duk_err_api(duk_hthread *thr, const char *filename, duk_int_t linenumber, const char *message) {
DUK_ERROR_RAW(thr, filename, linenumber, DUK_ERR_API_ERROR, message);
}
DUK_INTERNAL void duk_err_unimplemented_defmsg(duk_hthread *thr, const char *filename, duk_int_t linenumber) {
DUK_ERROR_RAW(thr, filename, linenumber, DUK_ERR_UNIMPLEMENTED_ERROR, DUK_STR_UNIMPLEMENTED);
}
#if !defined(DUK_USE_BYTECODE_DUMP_SUPPORT)
DUK_INTERNAL void duk_err_unsupported_defmsg(duk_hthread *thr, const char *filename, duk_int_t linenumber) {
DUK_ERROR_RAW(thr, filename, linenumber, DUK_ERR_UNSUPPORTED_ERROR, DUK_STR_UNSUPPORTED);
}
#endif
DUK_INTERNAL void duk_err_internal_defmsg(duk_hthread *thr, const char *filename, duk_int_t linenumber) {
DUK_ERROR_RAW(thr, filename, linenumber, DUK_ERR_INTERNAL_ERROR, DUK_STR_INTERNAL_ERROR);
}
DUK_INTERNAL void duk_err_internal(duk_hthread *thr, const char *filename, duk_int_t linenumber, const char *message) {
DUK_ERROR_RAW(thr, filename, linenumber, DUK_ERR_INTERNAL_ERROR, message);
}
DUK_INTERNAL void duk_err_alloc(duk_hthread *thr, const char *filename, duk_int_t linenumber, const char *message) {
DUK_ERROR_RAW(thr, filename, linenumber, DUK_ERR_ALLOC_ERROR, message);
}
#else
/* The file/line arguments are NULL and 0, they're ignored by DUK_ERROR_RAW()
* when non-verbose errors are used.
*/
DUK_INTERNAL void duk_err_type(duk_hthread *thr) {
DUK_ERROR_RAW(thr, NULL, 0, DUK_ERR_TYPE_ERROR, NULL);
}
DUK_INTERNAL void duk_err_api(duk_hthread *thr) {
DUK_ERROR_RAW(thr, NULL, 0, DUK_ERR_API_ERROR, NULL);
}
DUK_INTERNAL void duk_err_range(duk_hthread *thr) {
DUK_ERROR_RAW(thr, NULL, 0, DUK_ERR_RANGE_ERROR, NULL);
}
DUK_INTERNAL void duk_err_syntax(duk_hthread *thr) {
DUK_ERROR_RAW(thr, NULL, 0, DUK_ERR_SYNTAX_ERROR, NULL);
}
DUK_INTERNAL void duk_err_unimplemented(duk_hthread *thr) {
DUK_ERROR_RAW(thr, NULL, 0, DUK_ERR_UNIMPLEMENTED_ERROR, NULL);
}
DUK_INTERNAL void duk_err_unsupported(duk_hthread *thr) {
DUK_ERROR_RAW(thr, NULL, 0, DUK_ERR_UNSUPPORTED_ERROR, NULL);
}
DUK_INTERNAL void duk_err_internal(duk_hthread *thr) {
DUK_ERROR_RAW(thr, NULL, 0, DUK_ERR_INTERNAL_ERROR, NULL);
}
DUK_INTERNAL void duk_err_alloc(duk_hthread *thr) {
DUK_ERROR_RAW(thr, NULL, thr, DUK_ERR_ALLOC_ERROR, NULL);
}
#endif
/*
* Default fatal error handler
*/
DUK_INTERNAL void duk_default_fatal_handler(duk_context *ctx, duk_errcode_t code, const char *msg) {
DUK_UNREF(ctx);
#if defined(DUK_USE_FILE_IO)
DUK_FPRINTF(DUK_STDERR, "FATAL %ld: %s\n", (long) code, (const char *) (msg ? msg : "null"));
DUK_FFLUSH(DUK_STDERR);
#else
/* omit print */
#endif
DUK_D(DUK_DPRINT("default fatal handler called, code %ld -> calling DUK_PANIC()", (long) code));
DUK_PANIC(code, msg);
DUK_UNREACHABLE();
}
/*
* Default panic handler
*/
#if !defined(DUK_USE_PANIC_HANDLER)
DUK_INTERNAL void duk_default_panic_handler(duk_errcode_t code, const char *msg) {
#if defined(DUK_USE_FILE_IO)
DUK_FPRINTF(DUK_STDERR, "PANIC %ld: %s ("
#if defined(DUK_USE_PANIC_ABORT)
"calling abort"
#elif defined(DUK_USE_PANIC_EXIT)
"calling exit"
#elif defined(DUK_USE_PANIC_SEGFAULT)
"segfaulting on purpose"
#else
#error no DUK_USE_PANIC_xxx macro defined
#endif
")\n", (long) code, (const char *) (msg ? msg : "null"));
DUK_FFLUSH(DUK_STDERR);
#else
/* omit print */
DUK_UNREF(code);
DUK_UNREF(msg);
#endif
#if defined(DUK_USE_PANIC_ABORT)
DUK_ABORT();
#elif defined(DUK_USE_PANIC_EXIT)
DUK_EXIT(-1);
#elif defined(DUK_USE_PANIC_SEGFAULT)
/* exit() afterwards to satisfy "noreturn" */
DUK_CAUSE_SEGFAULT(); /* SCANBUILD: "Dereference of null pointer", normal */
DUK_EXIT(-1);
#else
#error no DUK_USE_PANIC_xxx macro defined
#endif
DUK_UNREACHABLE();
}
#endif /* !DUK_USE_PANIC_HANDLER */
#undef DUK__ERRFMT_BUFSIZE
#line 1 "duk_unicode_support.c"
/*
* Various Unicode help functions for character classification predicates,
* case conversion, decoding, etc.
*/
/* include removed: duk_internal.h */
/*
* Fast path tables
*/
#if defined(DUK_USE_IDCHAR_FASTPATH)
DUK_INTERNAL const duk_int8_t duk_is_idchar_tab[128] = {
/* 0: not IdentifierStart or IdentifierPart
* 1: IdentifierStart and IdentifierPart
* -1: IdentifierPart only
*/
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00...0x0f */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10...0x1f */
0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20...0x2f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, /* 0x30...0x3f */
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x40...0x4f */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, /* 0x50...0x5f */
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x60...0x6f */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 /* 0x70...0x7f */
};
#endif
/*
* XUTF-8 and CESU-8 encoding/decoding
*/
DUK_INTERNAL duk_small_int_t duk_unicode_get_xutf8_length(duk_ucodepoint_t cp) {
duk_uint_fast32_t x = (duk_uint_fast32_t) cp;
if (x < 0x80UL) {
/* 7 bits */
return 1;
} else if (x < 0x800UL) {
/* 11 bits */
return 2;
} else if (x < 0x10000UL) {
/* 16 bits */
return 3;
} else if (x < 0x200000UL) {
/* 21 bits */
return 4;
} else if (x < 0x4000000UL) {
/* 26 bits */
return 5;
} else if (x < (duk_ucodepoint_t) 0x80000000UL) {
/* 31 bits */
return 6;
} else {
/* 36 bits */
return 7;
}
}
#if defined(DUK_USE_ASSERTIONS)
DUK_INTERNAL duk_small_int_t duk_unicode_get_cesu8_length(duk_ucodepoint_t cp) {
duk_uint_fast32_t x = (duk_uint_fast32_t) cp;
if (x < 0x80UL) {
/* 7 bits */
return 1;
} else if (x < 0x800UL) {
/* 11 bits */
return 2;
} else if (x < 0x10000UL) {
/* 16 bits */
return 3;
} else {
/* Encoded as surrogate pair, each encoding to 3 bytes for
* 6 bytes total. Codepoints above U+10FFFF encode as 6 bytes
* too, see duk_unicode_encode_cesu8().
*/
return 3 + 3;
}
}
#endif /* DUK_USE_ASSERTIONS */
DUK_INTERNAL const duk_uint8_t duk_unicode_xutf8_markers[7] = {
0x00, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe
};
/* Encode to extended UTF-8; 'out' must have space for at least
* DUK_UNICODE_MAX_XUTF8_LENGTH bytes. Allows encoding of any
* 32-bit (unsigned) codepoint.
*/
DUK_INTERNAL duk_small_int_t duk_unicode_encode_xutf8(duk_ucodepoint_t cp, duk_uint8_t *out) {
duk_uint_fast32_t x = (duk_uint_fast32_t) cp;
duk_small_int_t len;
duk_uint8_t marker;
duk_small_int_t i;
len = duk_unicode_get_xutf8_length(cp);
DUK_ASSERT(len > 0);
marker = duk_unicode_xutf8_markers[len - 1]; /* 64-bit OK because always >= 0 */
i = len;
DUK_ASSERT(i > 0);
do {
i--;
if (i > 0) {
out[i] = (duk_uint8_t) (0x80 + (x & 0x3f));
x >>= 6;
} else {
/* Note: masking of 'x' is not necessary because of
* range check and shifting -> no bits overlapping
* the marker should be set.
*/
out[0] = (duk_uint8_t) (marker + x);
}
} while (i > 0);
return len;
}
/* Encode to CESU-8; 'out' must have space for at least
* DUK_UNICODE_MAX_CESU8_LENGTH bytes; codepoints above U+10FFFF
* will encode to garbage but won't overwrite the output buffer.
*/
DUK_INTERNAL duk_small_int_t duk_unicode_encode_cesu8(duk_ucodepoint_t cp, duk_uint8_t *out) {
duk_uint_fast32_t x = (duk_uint_fast32_t) cp;
duk_small_int_t len;
if (x < 0x80UL) {
out[0] = (duk_uint8_t) x;
len = 1;
} else if (x < 0x800UL) {
out[0] = (duk_uint8_t) (0xc0 + ((x >> 6) & 0x1f));
out[1] = (duk_uint8_t) (0x80 + (x & 0x3f));
len = 2;
} else if (x < 0x10000UL) {
/* surrogate pairs get encoded here */
out[0] = (duk_uint8_t) (0xe0 + ((x >> 12) & 0x0f));
out[1] = (duk_uint8_t) (0x80 + ((x >> 6) & 0x3f));
out[2] = (duk_uint8_t) (0x80 + (x & 0x3f));
len = 3;
} else {
/*
* Unicode codepoints above U+FFFF are encoded as surrogate
* pairs here. This ensures that all CESU-8 codepoints are
* 16-bit values as expected in Ecmascript. The surrogate
* pairs always get a 3-byte encoding (each) in CESU-8.
* See: http://en.wikipedia.org/wiki/Surrogate_pair
*
* 20-bit codepoint, 10 bits (A and B) per surrogate pair:
*
* x = 0b00000000 0000AAAA AAAAAABB BBBBBBBB
* sp1 = 0b110110AA AAAAAAAA (0xd800 + ((x >> 10) & 0x3ff))
* sp2 = 0b110111BB BBBBBBBB (0xdc00 + (x & 0x3ff))
*
* Encoded into CESU-8:
*
* sp1 -> 0b11101101 (0xe0 + ((sp1 >> 12) & 0x0f))
* -> 0b1010AAAA (0x80 + ((sp1 >> 6) & 0x3f))
* -> 0b10AAAAAA (0x80 + (sp1 & 0x3f))
* sp2 -> 0b11101101 (0xe0 + ((sp2 >> 12) & 0x0f))
* -> 0b1011BBBB (0x80 + ((sp2 >> 6) & 0x3f))
* -> 0b10BBBBBB (0x80 + (sp2 & 0x3f))
*
* Note that 0x10000 must be subtracted first. The code below
* avoids the sp1, sp2 temporaries which saves around 20 bytes
* of code.
*/
x -= 0x10000UL;
out[0] = (duk_uint8_t) (0xed);
out[1] = (duk_uint8_t) (0xa0 + ((x >> 16) & 0x0f));
out[2] = (duk_uint8_t) (0x80 + ((x >> 10) & 0x3f));
out[3] = (duk_uint8_t) (0xed);
out[4] = (duk_uint8_t) (0xb0 + ((x >> 6) & 0x0f));
out[5] = (duk_uint8_t) (0x80 + (x & 0x3f));
len = 6;
}
return len;
}
/* Decode helper. Return zero on error. */
DUK_INTERNAL duk_small_int_t duk_unicode_decode_xutf8(duk_hthread *thr, const duk_uint8_t **ptr, const duk_uint8_t *ptr_start, const duk_uint8_t *ptr_end, duk_ucodepoint_t *out_cp) {
const duk_uint8_t *p;
duk_uint32_t res;
duk_uint_fast8_t ch;
duk_small_int_t n;
DUK_UNREF(thr);
p = *ptr;
if (p < ptr_start || p >= ptr_end) {
goto fail;
}
/*
* UTF-8 decoder which accepts longer than standard byte sequences.
* This allows full 32-bit code points to be used.
*/
ch = (duk_uint_fast8_t) (*p++);
if (ch < 0x80) {
/* 0xxx xxxx [7 bits] */
res = (duk_uint32_t) (ch & 0x7f);
n = 0;
} else if (ch < 0xc0) {
/* 10xx xxxx -> invalid */
goto fail;
} else if (ch < 0xe0) {
/* 110x xxxx 10xx xxxx [11 bits] */
res = (duk_uint32_t) (ch & 0x1f);
n = 1;
} else if (ch < 0xf0) {
/* 1110 xxxx 10xx xxxx 10xx xxxx [16 bits] */
res = (duk_uint32_t) (ch & 0x0f);
n = 2;
} else if (ch < 0xf8) {
/* 1111 0xxx 10xx xxxx 10xx xxxx 10xx xxxx [21 bits] */
res = (duk_uint32_t) (ch & 0x07);
n = 3;
} else if (ch < 0xfc) {
/* 1111 10xx 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx [26 bits] */
res = (duk_uint32_t) (ch & 0x03);
n = 4;
} else if (ch < 0xfe) {
/* 1111 110x 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx [31 bits] */
res = (duk_uint32_t) (ch & 0x01);
n = 5;
} else if (ch < 0xff) {
/* 1111 1110 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx [36 bits] */
res = (duk_uint32_t) (0);
n = 6;
} else {
/* 8-byte format could be:
* 1111 1111 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx 10xx xxxx [41 bits]
*
* However, this format would not have a zero bit following the
* leading one bits and would not allow 0xFF to be used as an
* "invalid xutf-8" marker for internal keys. Further, 8-byte
* encodings (up to 41 bit code points) are not currently needed.
*/
goto fail;
}
DUK_ASSERT(p >= ptr_start); /* verified at beginning */
if (p + n > ptr_end) {
/* check pointer at end */
goto fail;
}
while (n > 0) {
DUK_ASSERT(p >= ptr_start && p < ptr_end);
res = res << 6;
res += (duk_uint32_t) ((*p++) & 0x3f);
n--;
}
*ptr = p;
*out_cp = res;
return 1;
fail:
return 0;
}
/* used by e.g. duk_regexp_executor.c, string built-ins */
DUK_INTERNAL duk_ucodepoint_t duk_unicode_decode_xutf8_checked(duk_hthread *thr, const duk_uint8_t **ptr, const duk_uint8_t *ptr_start, const duk_uint8_t *ptr_end) {
duk_ucodepoint_t cp;
if (duk_unicode_decode_xutf8(thr, ptr, ptr_start, ptr_end, &cp)) {
return cp;
}
DUK_ERROR_INTERNAL(thr, "utf-8 decode failed"); /* XXX: 'internal error' is a bit of a misnomer */
DUK_UNREACHABLE();
return 0;
}
/* Compute (extended) utf-8 length without codepoint encoding validation,
* used for string interning.
*
* NOTE: This algorithm is performance critical, more so than string hashing
* in some cases. It is needed when interning a string and needs to scan
* every byte of the string with no skipping. Having an ASCII fast path
* is useful if possible in the algorithm. The current algorithms were
* chosen from several variants, based on x64 gcc -O2 testing. See:
* https://github.com/svaarala/duktape/pull/422
*
* NOTE: must match src/dukutil.py:duk_unicode_unvalidated_utf8_length().
*/
#if defined(DUK_USE_PREFER_SIZE)
/* Small variant; roughly 150 bytes smaller than the fast variant. */
DUK_INTERNAL duk_size_t duk_unicode_unvalidated_utf8_length(const duk_uint8_t *data, duk_size_t blen) {
const duk_uint8_t *p;
const duk_uint8_t *p_end;
duk_size_t ncont;
duk_size_t clen;
p = data;
p_end = data + blen;
ncont = 0;
while (p != p_end) {
duk_uint8_t x;
x = *p++;
if (DUK_UNLIKELY(x >= 0x80 && x <= 0xbf)) {
ncont++;
}
}
DUK_ASSERT(ncont <= blen);
clen = blen - ncont;
DUK_ASSERT(clen <= blen);
return clen;
}
#else /* DUK_USE_PREFER_SIZE */
/* This seems like a good overall approach. Fast path for ASCII in 4 byte
* blocks.
*/
DUK_INTERNAL duk_size_t duk_unicode_unvalidated_utf8_length(const duk_uint8_t *data, duk_size_t blen) {
const duk_uint8_t *p;
const duk_uint8_t *p_end;
const duk_uint32_t *p32_end;
const duk_uint32_t *p32;
duk_size_t ncont;
duk_size_t clen;
ncont = 0; /* number of continuation (non-initial) bytes in [0x80,0xbf] */
p = data;
p_end = data + blen;
if (blen < 16) {
goto skip_fastpath;
}
/* Align 'p' to 4; the input data may have arbitrary alignment.
* End of string check not needed because blen >= 16.
*/
while (((duk_size_t) (const void *) p) & 0x03U) {
duk_uint8_t x;
x = *p++;
if (DUK_UNLIKELY(x >= 0x80 && x <= 0xbf)) {
ncont++;
}
}
/* Full, aligned 4-byte reads. */
p32_end = (const duk_uint32_t *) (const void *) (p + ((duk_size_t) (p_end - p) & (duk_size_t) (~0x03)));
p32 = (const duk_uint32_t *) (const void *) p;
while (p32 != (const duk_uint32_t *) p32_end) {
duk_uint32_t x;
x = *p32++;
if (DUK_LIKELY((x & 0x80808080UL) == 0)) {
; /* ASCII fast path */
} else {
/* Flip highest bit of each byte which changes
* the bit pattern 10xxxxxx into 00xxxxxx which
* allows an easy bit mask test.
*/
x ^= 0x80808080UL;
if (DUK_UNLIKELY(!(x & 0xc0000000UL))) {
ncont++;
}
if (DUK_UNLIKELY(!(x & 0x00c00000UL))) {
ncont++;
}
if (DUK_UNLIKELY(!(x & 0x0000c000UL))) {
ncont++;
}
if (DUK_UNLIKELY(!(x & 0x000000c0UL))) {
ncont++;
}
}
}
p = (const duk_uint8_t *) p32;
/* Fall through to handle the rest. */
skip_fastpath:
while (p != p_end) {
duk_uint8_t x;
x = *p++;
if (DUK_UNLIKELY(x >= 0x80 && x <= 0xbf)) {
ncont++;
}
}
DUK_ASSERT(ncont <= blen);
clen = blen - ncont;
DUK_ASSERT(clen <= blen);
return clen;
}
#endif /* DUK_USE_PREFER_SIZE */
/*
* Unicode range matcher
*
* Matches a codepoint against a packed bitstream of character ranges.
* Used for slow path Unicode matching.
*/
/* Must match src/extract_chars.py, generate_match_table3(). */
DUK_LOCAL duk_uint32_t duk__uni_decode_value(duk_bitdecoder_ctx *bd_ctx) {
duk_uint32_t t;
t = (duk_uint32_t) duk_bd_decode(bd_ctx, 4);
if (t <= 0x0eU) {
return t;
}
t = (duk_uint32_t) duk_bd_decode(bd_ctx, 8);
if (t <= 0xfdU) {
return t + 0x0f;
}
if (t == 0xfeU) {
t = (duk_uint32_t) duk_bd_decode(bd_ctx, 12);
return t + 0x0fU + 0xfeU;
} else {
t = (duk_uint32_t) duk_bd_decode(bd_ctx, 24);
return t + 0x0fU + 0xfeU + 0x1000UL;
}
}
DUK_LOCAL duk_small_int_t duk__uni_range_match(const duk_uint8_t *unitab, duk_size_t unilen, duk_codepoint_t cp) {
duk_bitdecoder_ctx bd_ctx;
duk_codepoint_t prev_re;
DUK_MEMZERO(&bd_ctx, sizeof(bd_ctx));
bd_ctx.data = (const duk_uint8_t *) unitab;
bd_ctx.length = (duk_size_t) unilen;
prev_re = 0;
for (;;) {
duk_codepoint_t r1, r2;
r1 = (duk_codepoint_t) duk__uni_decode_value(&bd_ctx);
if (r1 == 0) {
break;
}
r2 = (duk_codepoint_t) duk__uni_decode_value(&bd_ctx);
r1 = prev_re + r1;
r2 = r1 + r2;
prev_re = r2;
/* [r1,r2] is the range */
DUK_DDD(DUK_DDDPRINT("duk__uni_range_match: cp=%06lx range=[0x%06lx,0x%06lx]",
(unsigned long) cp, (unsigned long) r1, (unsigned long) r2));
if (cp >= r1 && cp <= r2) {
return 1;
}
}
return 0;
}
/*
* "WhiteSpace" production check.
*/
DUK_INTERNAL duk_small_int_t duk_unicode_is_whitespace(duk_codepoint_t cp) {
/*
* E5 Section 7.2 specifies six characters specifically as
* white space:
*
* 0009;<control>;Cc;0;S;;;;;N;CHARACTER TABULATION;;;;
* 000B;<control>;Cc;0;S;;;;;N;LINE TABULATION;;;;
* 000C;<control>;Cc;0;WS;;;;;N;FORM FEED (FF);;;;
* 0020;SPACE;Zs;0;WS;;;;;N;;;;;
* 00A0;NO-BREAK SPACE;Zs;0;CS;<noBreak> 0020;;;;N;NON-BREAKING SPACE;;;;
* FEFF;ZERO WIDTH NO-BREAK SPACE;Cf;0;BN;;;;;N;BYTE ORDER MARK;;;;
*
* It also specifies any Unicode category 'Zs' characters as white
* space. These can be extracted with the "src/extract_chars.py" script.
* Current result:
*
* RAW OUTPUT:
* ===========
* 0020;SPACE;Zs;0;WS;;;;;N;;;;;
* 00A0;NO-BREAK SPACE;Zs;0;CS;<noBreak> 0020;;;;N;NON-BREAKING SPACE;;;;
* 1680;OGHAM SPACE MARK;Zs;0;WS;;;;;N;;;;;
* 180E;MONGOLIAN VOWEL SEPARATOR;Zs;0;WS;;;;;N;;;;;
* 2000;EN QUAD;Zs;0;WS;2002;;;;N;;;;;
* 2001;EM QUAD;Zs;0;WS;2003;;;;N;;;;;
* 2002;EN SPACE;Zs;0;WS;<compat> 0020;;;;N;;;;;
* 2003;EM SPACE;Zs;0;WS;<compat> 0020;;;;N;;;;;
* 2004;THREE-PER-EM SPACE;Zs;0;WS;<compat> 0020;;;;N;;;;;
* 2005;FOUR-PER-EM SPACE;Zs;0;WS;<compat> 0020;;;;N;;;;;
* 2006;SIX-PER-EM SPACE;Zs;0;WS;<compat> 0020;;;;N;;;;;
* 2007;FIGURE SPACE;Zs;0;WS;<noBreak> 0020;;;;N;;;;;
* 2008;PUNCTUATION SPACE;Zs;0;WS;<compat> 0020;;;;N;;;;;
* 2009;THIN SPACE;Zs;0;WS;<compat> 0020;;;;N;;;;;
* 200A;HAIR SPACE;Zs;0;WS;<compat> 0020;;;;N;;;;;
* 202F;NARROW NO-BREAK SPACE;Zs;0;CS;<noBreak> 0020;;;;N;;;;;
* 205F;MEDIUM MATHEMATICAL SPACE;Zs;0;WS;<compat> 0020;;;;N;;;;;
* 3000;IDEOGRAPHIC SPACE;Zs;0;WS;<wide> 0020;;;;N;;;;;
*
* RANGES:
* =======
* 0x0020
* 0x00a0
* 0x1680
* 0x180e
* 0x2000 ... 0x200a
* 0x202f
* 0x205f
* 0x3000
*
* A manual decoder (below) is probably most compact for this.
*/
duk_uint_fast8_t lo;
duk_uint_fast32_t hi;
/* cp == -1 (EOF) never matches and causes return value 0 */
lo = (duk_uint_fast8_t) (cp & 0xff);
hi = (duk_uint_fast32_t) (cp >> 8); /* does not fit into an uchar */
if (hi == 0x0000UL) {
if (lo == 0x09U || lo == 0x0bU || lo == 0x0cU ||
lo == 0x20U || lo == 0xa0U) {
return 1;
}
} else if (hi == 0x0020UL) {
if (lo <= 0x0aU || lo == 0x2fU || lo == 0x5fU) {
return 1;
}
} else if (cp == 0x1680L || cp == 0x180eL || cp == 0x3000L ||
cp == 0xfeffL) {
return 1;
}
return 0;
}
/*
* "LineTerminator" production check.
*/
DUK_INTERNAL duk_small_int_t duk_unicode_is_line_terminator(duk_codepoint_t cp) {
/*
* E5 Section 7.3
*
* A LineTerminatorSequence essentially merges <CR> <LF> sequences
* into a single line terminator. This must be handled by the caller.
*/
if (cp == 0x000aL || cp == 0x000dL || cp == 0x2028L ||
cp == 0x2029L) {
return 1;
}
return 0;
}
/*
* "IdentifierStart" production check.
*/
DUK_INTERNAL duk_small_int_t duk_unicode_is_identifier_start(duk_codepoint_t cp) {
/*
* E5 Section 7.6:
*
* IdentifierStart:
* UnicodeLetter
* $
* _
* \ UnicodeEscapeSequence
*
* IdentifierStart production has one multi-character production:
*
* \ UnicodeEscapeSequence
*
* The '\' character is -not- matched by this function. Rather, the caller
* should decode the escape and then call this function to check whether the
* decoded character is acceptable (see discussion in E5 Section 7.6).
*
* The "UnicodeLetter" alternative of the production allows letters
* from various Unicode categories. These can be extracted with the
* "src/extract_chars.py" script.
*
* Because the result has hundreds of Unicode codepoint ranges, matching
* for any values >= 0x80 are done using a very slow range-by-range scan
* and a packed range format.
*
* The ASCII portion (codepoints 0x00 ... 0x7f) is fast-pathed below because
* it matters the most. The ASCII related ranges of IdentifierStart are:
*
* 0x0041 ... 0x005a ['A' ... 'Z']
* 0x0061 ... 0x007a ['a' ... 'z']
* 0x0024 ['$']
* 0x005f ['_']
*/
/* ASCII (and EOF) fast path -- quick accept and reject */
if (cp <= 0x7fL) {
#if defined(DUK_USE_IDCHAR_FASTPATH)
return (cp >= 0) && (duk_is_idchar_tab[cp] > 0);
#else
if ((cp >= 'a' && cp <= 'z') ||
(cp >= 'A' && cp <= 'Z') ||
cp == '_' || cp == '$') {
return 1;
}
return 0;
#endif
}
/* Non-ASCII slow path (range-by-range linear comparison), very slow */
#ifdef DUK_USE_SOURCE_NONBMP
if (duk__uni_range_match(duk_unicode_ids_noa,
(duk_size_t) sizeof(duk_unicode_ids_noa),
(duk_codepoint_t) cp)) {
return 1;
}
return 0;
#else
if (cp < 0x10000L) {
if (duk__uni_range_match(duk_unicode_ids_noabmp,
sizeof(duk_unicode_ids_noabmp),
(duk_codepoint_t) cp)) {
return 1;
}
return 0;
} else {
/* without explicit non-BMP support, assume non-BMP characters
* are always accepted as identifier characters.
*/
return 1;
}
#endif
}
/*
* "IdentifierPart" production check.
*/
DUK_INTERNAL duk_small_int_t duk_unicode_is_identifier_part(duk_codepoint_t cp) {
/*
* E5 Section 7.6:
*
* IdentifierPart:
* IdentifierStart
* UnicodeCombiningMark
* UnicodeDigit
* UnicodeConnectorPunctuation
* <ZWNJ> [U+200C]
* <ZWJ> [U+200D]
*
* IdentifierPart production has one multi-character production
* as part of its IdentifierStart alternative. The '\' character
* of an escape sequence is not matched here, see discussion in
* duk_unicode_is_identifier_start().
*
* To match non-ASCII characters (codepoints >= 0x80), a very slow
* linear range-by-range scan is used. The codepoint is first compared
* to the IdentifierStart ranges, and if it doesn't match, then to a
* set consisting of code points in IdentifierPart but not in
* IdentifierStart. This is done to keep the unicode range data small,
* at the expense of speed.
*
* The ASCII fast path consists of:
*
* 0x0030 ... 0x0039 ['0' ... '9', UnicodeDigit]
* 0x0041 ... 0x005a ['A' ... 'Z', IdentifierStart]
* 0x0061 ... 0x007a ['a' ... 'z', IdentifierStart]
* 0x0024 ['$', IdentifierStart]
* 0x005f ['_', IdentifierStart and
* UnicodeConnectorPunctuation]
*
* UnicodeCombiningMark has no code points <= 0x7f.
*
* The matching code reuses the "identifier start" tables, and then
* consults a separate range set for characters in "identifier part"
* but not in "identifier start". These can be extracted with the
* "src/extract_chars.py" script.
*
* UnicodeCombiningMark -> categories Mn, Mc
* UnicodeDigit -> categories Nd
* UnicodeConnectorPunctuation -> categories Pc
*/
/* ASCII (and EOF) fast path -- quick accept and reject */
if (cp <= 0x7fL) {
#if defined(DUK_USE_IDCHAR_FASTPATH)
return (cp >= 0) && (duk_is_idchar_tab[cp] != 0);
#else
if ((cp >= 'a' && cp <= 'z') ||
(cp >= 'A' && cp <= 'Z') ||
(cp >= '0' && cp <= '9') ||
cp == '_' || cp == '$') {
return 1;
}
return 0;
#endif
}
/* Non-ASCII slow path (range-by-range linear comparison), very slow */
#ifdef DUK_USE_SOURCE_NONBMP
if (duk__uni_range_match(duk_unicode_ids_noa,
sizeof(duk_unicode_ids_noa),
(duk_codepoint_t) cp) ||
duk__uni_range_match(duk_unicode_idp_m_ids_noa,
sizeof(duk_unicode_idp_m_ids_noa),
(duk_codepoint_t) cp)) {
return 1;
}
return 0;
#else
if (cp < 0x10000L) {
if (duk__uni_range_match(duk_unicode_ids_noabmp,
sizeof(duk_unicode_ids_noabmp),
(duk_codepoint_t) cp) ||
duk__uni_range_match(duk_unicode_idp_m_ids_noabmp,
sizeof(duk_unicode_idp_m_ids_noabmp),
(duk_codepoint_t) cp)) {
return 1;
}
return 0;
} else {
/* without explicit non-BMP support, assume non-BMP characters
* are always accepted as identifier characters.
*/
return 1;
}
#endif
}
/*
* Unicode letter check.
*/
DUK_INTERNAL duk_small_int_t duk_unicode_is_letter(duk_codepoint_t cp) {
/*
* Unicode letter is now taken to be the categories:
*
* Lu, Ll, Lt, Lm, Lo
*
* (Not sure if this is exactly correct.)
*
* The ASCII fast path consists of:
*
* 0x0041 ... 0x005a ['A' ... 'Z']
* 0x0061 ... 0x007a ['a' ... 'z']
*/
/* ASCII (and EOF) fast path -- quick accept and reject */
if (cp <= 0x7fL) {
if ((cp >= 'a' && cp <= 'z') ||
(cp >= 'A' && cp <= 'Z')) {
return 1;
}
return 0;
}
/* Non-ASCII slow path (range-by-range linear comparison), very slow */
#ifdef DUK_USE_SOURCE_NONBMP
if (duk__uni_range_match(duk_unicode_ids_noa,
sizeof(duk_unicode_ids_noa),
(duk_codepoint_t) cp) &&
!duk__uni_range_match(duk_unicode_ids_m_let_noa,
sizeof(duk_unicode_ids_m_let_noa),
(duk_codepoint_t) cp)) {
return 1;
}
return 0;
#else
if (cp < 0x10000L) {
if (duk__uni_range_match(duk_unicode_ids_noabmp,
sizeof(duk_unicode_ids_noabmp),
(duk_codepoint_t) cp) &&
!duk__uni_range_match(duk_unicode_ids_m_let_noabmp,
sizeof(duk_unicode_ids_m_let_noabmp),
(duk_codepoint_t) cp)) {
return 1;
}
return 0;
} else {
/* without explicit non-BMP support, assume non-BMP characters
* are always accepted as letters.
*/
return 1;
}
#endif
}
/*
* Complex case conversion helper which decodes a bit-packed conversion
* control stream generated by unicode/extract_caseconv.py. The conversion
* is very slow because it runs through the conversion data in a linear
* fashion to save space (which is why ASCII characters have a special
* fast path before arriving here).
*
* The particular bit counts etc have been determined experimentally to
* be small but still sufficient, and must match the Python script
* (src/extract_caseconv.py).
*
* The return value is the case converted codepoint or -1 if the conversion
* results in multiple characters (this is useful for regexp Canonicalization
* operation). If 'buf' is not NULL, the result codepoint(s) are also
* appended to the hbuffer.
*
* Context and locale specific rules must be checked before consulting
* this function.
*/
DUK_LOCAL
duk_codepoint_t duk__slow_case_conversion(duk_hthread *thr,
duk_bufwriter_ctx *bw,
duk_codepoint_t cp,
duk_bitdecoder_ctx *bd_ctx) {
duk_small_int_t skip = 0;
duk_small_int_t n;
duk_small_int_t t;
duk_small_int_t count;
duk_codepoint_t tmp_cp;
duk_codepoint_t start_i;
duk_codepoint_t start_o;
DUK_UNREF(thr);
DUK_ASSERT(bd_ctx != NULL);
DUK_DDD(DUK_DDDPRINT("slow case conversion for codepoint: %ld", (long) cp));
/* range conversion with a "skip" */
DUK_DDD(DUK_DDDPRINT("checking ranges"));
for (;;) {
skip++;
n = (duk_small_int_t) duk_bd_decode(bd_ctx, 6);
if (n == 0x3f) {
/* end marker */
break;
}
DUK_DDD(DUK_DDDPRINT("skip=%ld, n=%ld", (long) skip, (long) n));
while (n--) {
start_i = (duk_codepoint_t) duk_bd_decode(bd_ctx, 16);
start_o = (duk_codepoint_t) duk_bd_decode(bd_ctx, 16);
count = (duk_small_int_t) duk_bd_decode(bd_ctx, 7);
DUK_DDD(DUK_DDDPRINT("range: start_i=%ld, start_o=%ld, count=%ld, skip=%ld",
(long) start_i, (long) start_o, (long) count, (long) skip));
if (cp >= start_i) {
tmp_cp = cp - start_i; /* always >= 0 */
if (tmp_cp < (duk_codepoint_t) count * (duk_codepoint_t) skip &&
(tmp_cp % (duk_codepoint_t) skip) == 0) {
DUK_DDD(DUK_DDDPRINT("range matches input codepoint"));
cp = start_o + tmp_cp;
goto single;
}
}
}
}
/* 1:1 conversion */
n = (duk_small_int_t) duk_bd_decode(bd_ctx, 6);
DUK_DDD(DUK_DDDPRINT("checking 1:1 conversions (count %ld)", (long) n));
while (n--) {
start_i = (duk_codepoint_t) duk_bd_decode(bd_ctx, 16);
start_o = (duk_codepoint_t) duk_bd_decode(bd_ctx, 16);
DUK_DDD(DUK_DDDPRINT("1:1 conversion %ld -> %ld", (long) start_i, (long) start_o));
if (cp == start_i) {
DUK_DDD(DUK_DDDPRINT("1:1 matches input codepoint"));
cp = start_o;
goto single;
}
}
/* complex, multicharacter conversion */
n = (duk_small_int_t) duk_bd_decode(bd_ctx, 7);
DUK_DDD(DUK_DDDPRINT("checking 1:n conversions (count %ld)", (long) n));
while (n--) {
start_i = (duk_codepoint_t) duk_bd_decode(bd_ctx, 16);
t = (duk_small_int_t) duk_bd_decode(bd_ctx, 2);
DUK_DDD(DUK_DDDPRINT("1:n conversion %ld -> %ld chars", (long) start_i, (long) t));
if (cp == start_i) {
DUK_DDD(DUK_DDDPRINT("1:n matches input codepoint"));
if (bw != NULL) {
while (t--) {
tmp_cp = (duk_codepoint_t) duk_bd_decode(bd_ctx, 16);
DUK_BW_WRITE_RAW_XUTF8(thr, bw, (duk_ucodepoint_t) tmp_cp);
}
}
return -1;
} else {
while (t--) {
(void) duk_bd_decode(bd_ctx, 16);
}
}
}
/* default: no change */
DUK_DDD(DUK_DDDPRINT("no rule matches, output is same as input"));
/* fall through */
single:
if (bw != NULL) {
DUK_BW_WRITE_RAW_XUTF8(thr, bw, (duk_ucodepoint_t) cp);
}
return cp;
}
/*
* Case conversion helper, with context/local sensitivity.
* For proper case conversion, one needs to know the character
* and the preceding and following characters, as well as
* locale/language.
*/
/* XXX: add 'language' argument when locale/language sensitive rule
* support added.
*/
DUK_LOCAL
duk_codepoint_t duk__case_transform_helper(duk_hthread *thr,
duk_bufwriter_ctx *bw,
duk_codepoint_t cp,
duk_codepoint_t prev,
duk_codepoint_t next,
duk_bool_t uppercase) {
duk_bitdecoder_ctx bd_ctx;
/* fast path for ASCII */
if (cp < 0x80L) {
/* XXX: there are language sensitive rules for the ASCII range.
* If/when language/locale support is implemented, they need to
* be implemented here for the fast path. There are no context
* sensitive rules for ASCII range.
*/
if (uppercase) {
if (cp >= 'a' && cp <= 'z') {
cp = cp - 'a' + 'A';
}
} else {
if (cp >= 'A' && cp <= 'Z') {
cp = cp - 'A' + 'a';
}
}
if (bw != NULL) {
DUK_BW_WRITE_RAW_U8(thr, bw, (duk_uint8_t) cp);
}
return cp;
}
/* context and locale specific rules which cannot currently be represented
* in the caseconv bitstream: hardcoded rules in C
*/
if (uppercase) {
/* XXX: turkish / azeri */
} else {
/*
* Final sigma context specific rule. This is a rather tricky
* rule and this handling is probably not 100% correct now.
* The rule is not locale/language specific so it is supported.
*/
if (cp == 0x03a3L && /* U+03A3 = GREEK CAPITAL LETTER SIGMA */
duk_unicode_is_letter(prev) && /* prev exists and is not a letter */
!duk_unicode_is_letter(next)) { /* next does not exist or next is not a letter */
/* Capital sigma occurred at "end of word", lowercase to
* U+03C2 = GREEK SMALL LETTER FINAL SIGMA. Otherwise
* fall through and let the normal rules lowercase it to
* U+03C3 = GREEK SMALL LETTER SIGMA.
*/
cp = 0x03c2L;
goto singlechar;
}
/* XXX: lithuanian not implemented */
/* XXX: lithuanian, explicit dot rules */
/* XXX: turkish / azeri, lowercase rules */
}
/* 1:1 or special conversions, but not locale/context specific: script generated rules */
DUK_MEMZERO(&bd_ctx, sizeof(bd_ctx));
if (uppercase) {
bd_ctx.data = (const duk_uint8_t *) duk_unicode_caseconv_uc;
bd_ctx.length = (duk_size_t) sizeof(duk_unicode_caseconv_uc);
} else {
bd_ctx.data = (const duk_uint8_t *) duk_unicode_caseconv_lc;
bd_ctx.length = (duk_size_t) sizeof(duk_unicode_caseconv_lc);
}
return duk__slow_case_conversion(thr, bw, cp, &bd_ctx);
singlechar:
if (bw != NULL) {
DUK_BW_WRITE_RAW_XUTF8(thr, bw, (duk_ucodepoint_t) cp);
}
return cp;
/* unused now, not needed until Turkish/Azeri */
#if 0
nochar:
return -1;
#endif
}
/*
* Replace valstack top with case converted version.
*/
DUK_INTERNAL void duk_unicode_case_convert_string(duk_hthread *thr, duk_small_int_t uppercase) {
duk_context *ctx = (duk_context *) thr;
duk_hstring *h_input;
duk_bufwriter_ctx bw_alloc;
duk_bufwriter_ctx *bw;
const duk_uint8_t *p, *p_start, *p_end;
duk_codepoint_t prev, curr, next;
h_input = duk_require_hstring(ctx, -1);
DUK_ASSERT(h_input != NULL);
bw = &bw_alloc;
DUK_BW_INIT_PUSHBUF(thr, bw, DUK_HSTRING_GET_BYTELEN(h_input));
/* [ ... input buffer ] */
p_start = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_input);
p_end = p_start + DUK_HSTRING_GET_BYTELEN(h_input);
p = p_start;
prev = -1; DUK_UNREF(prev);
curr = -1;
next = -1;
for (;;) {
prev = curr;
curr = next;
next = -1;
if (p < p_end) {
next = (int) duk_unicode_decode_xutf8_checked(thr, &p, p_start, p_end);
} else {
/* end of input and last char has been processed */
if (curr < 0) {
break;
}
}
/* on first round, skip */
if (curr >= 0) {
/* XXX: could add a fast path to process chunks of input codepoints,
* but relative benefit would be quite small.
*/
/* Ensure space for maximum multi-character result; estimate is overkill. */
DUK_BW_ENSURE(thr, bw, 8 * DUK_UNICODE_MAX_XUTF8_LENGTH);
duk__case_transform_helper(thr,
bw,
(duk_codepoint_t) curr,
prev,
next,
uppercase);
}
}
DUK_BW_COMPACT(thr, bw);
duk_to_string(ctx, -1); /* invalidates h_buf pointer */
duk_remove(ctx, -2);
}
#ifdef DUK_USE_REGEXP_SUPPORT
/*
* Canonicalize() abstract operation needed for canonicalization of individual
* codepoints during regexp compilation and execution, see E5 Section 15.10.2.8.
* Note that codepoints are canonicalized one character at a time, so no context
* specific rules can apply. Locale specific rules can apply, though.
*/
DUK_INTERNAL duk_codepoint_t duk_unicode_re_canonicalize_char(duk_hthread *thr, duk_codepoint_t cp) {
#if defined(DUK_USE_REGEXP_CANON_WORKAROUND)
/* Fast canonicalization lookup at the cost of 128kB footprint. */
DUK_ASSERT(cp >= 0);
DUK_UNREF(thr);
if (DUK_LIKELY(cp < 0x10000L)) {
return (duk_codepoint_t) duk_unicode_re_canon_lookup[cp];
}
return cp;
#else /* DUK_USE_REGEXP_CANON_WORKAROUND */
duk_codepoint_t y;
y = duk__case_transform_helper(thr,
NULL, /* NULL is allowed, no output */
cp, /* curr char */
-1, /* prev char */
-1, /* next char */
1); /* uppercase */
if ((y < 0) || (cp >= 0x80 && y < 0x80)) {
/* multiple codepoint conversion or non-ASCII mapped to ASCII
* --> leave as is.
*/
return cp;
}
return y;
#endif /* DUK_USE_REGEXP_CANON_WORKAROUND */
}
/*
* E5 Section 15.10.2.6 "IsWordChar" abstract operation. Assume
* x < 0 for characters read outside the string.
*/
DUK_INTERNAL duk_small_int_t duk_unicode_re_is_wordchar(duk_codepoint_t x) {
/*
* Note: the description in E5 Section 15.10.2.6 has a typo, it
* contains 'A' twice and lacks 'a'; the intent is [0-9a-zA-Z_].
*/
if ((x >= '0' && x <= '9') ||
(x >= 'a' && x <= 'z') ||
(x >= 'A' && x <= 'Z') ||
(x == '_')) {
return 1;
}
return 0;
}
/*
* Regexp range tables
*/
/* exposed because lexer needs these too */
DUK_INTERNAL const duk_uint16_t duk_unicode_re_ranges_digit[2] = {
(duk_uint16_t) 0x0030UL, (duk_uint16_t) 0x0039UL,
};
DUK_INTERNAL const duk_uint16_t duk_unicode_re_ranges_white[22] = {
(duk_uint16_t) 0x0009UL, (duk_uint16_t) 0x000DUL,
(duk_uint16_t) 0x0020UL, (duk_uint16_t) 0x0020UL,
(duk_uint16_t) 0x00A0UL, (duk_uint16_t) 0x00A0UL,
(duk_uint16_t) 0x1680UL, (duk_uint16_t) 0x1680UL,
(duk_uint16_t) 0x180EUL, (duk_uint16_t) 0x180EUL,
(duk_uint16_t) 0x2000UL, (duk_uint16_t) 0x200AUL,
(duk_uint16_t) 0x2028UL, (duk_uint16_t) 0x2029UL,
(duk_uint16_t) 0x202FUL, (duk_uint16_t) 0x202FUL,
(duk_uint16_t) 0x205FUL, (duk_uint16_t) 0x205FUL,
(duk_uint16_t) 0x3000UL, (duk_uint16_t) 0x3000UL,
(duk_uint16_t) 0xFEFFUL, (duk_uint16_t) 0xFEFFUL,
};
DUK_INTERNAL const duk_uint16_t duk_unicode_re_ranges_wordchar[8] = {
(duk_uint16_t) 0x0030UL, (duk_uint16_t) 0x0039UL,
(duk_uint16_t) 0x0041UL, (duk_uint16_t) 0x005AUL,
(duk_uint16_t) 0x005FUL, (duk_uint16_t) 0x005FUL,
(duk_uint16_t) 0x0061UL, (duk_uint16_t) 0x007AUL,
};
DUK_INTERNAL const duk_uint16_t duk_unicode_re_ranges_not_digit[4] = {
(duk_uint16_t) 0x0000UL, (duk_uint16_t) 0x002FUL,
(duk_uint16_t) 0x003AUL, (duk_uint16_t) 0xFFFFUL,
};
DUK_INTERNAL const duk_uint16_t duk_unicode_re_ranges_not_white[24] = {
(duk_uint16_t) 0x0000UL, (duk_uint16_t) 0x0008UL,
(duk_uint16_t) 0x000EUL, (duk_uint16_t) 0x001FUL,
(duk_uint16_t) 0x0021UL, (duk_uint16_t) 0x009FUL,
(duk_uint16_t) 0x00A1UL, (duk_uint16_t) 0x167FUL,
(duk_uint16_t) 0x1681UL, (duk_uint16_t) 0x180DUL,
(duk_uint16_t) 0x180FUL, (duk_uint16_t) 0x1FFFUL,
(duk_uint16_t) 0x200BUL, (duk_uint16_t) 0x2027UL,
(duk_uint16_t) 0x202AUL, (duk_uint16_t) 0x202EUL,
(duk_uint16_t) 0x2030UL, (duk_uint16_t) 0x205EUL,
(duk_uint16_t) 0x2060UL, (duk_uint16_t) 0x2FFFUL,
(duk_uint16_t) 0x3001UL, (duk_uint16_t) 0xFEFEUL,
(duk_uint16_t) 0xFF00UL, (duk_uint16_t) 0xFFFFUL,
};
DUK_INTERNAL const duk_uint16_t duk_unicode_re_ranges_not_wordchar[10] = {
(duk_uint16_t) 0x0000UL, (duk_uint16_t) 0x002FUL,
(duk_uint16_t) 0x003AUL, (duk_uint16_t) 0x0040UL,
(duk_uint16_t) 0x005BUL, (duk_uint16_t) 0x005EUL,
(duk_uint16_t) 0x0060UL, (duk_uint16_t) 0x0060UL,
(duk_uint16_t) 0x007BUL, (duk_uint16_t) 0xFFFFUL,
};
#endif /* DUK_USE_REGEXP_SUPPORT */
#line 1 "duk_util_misc.c"
/*
* Misc util stuff
*/
/* include removed: duk_internal.h */
/*
* Lowercase digits for radix values 2 to 36. Also doubles as lowercase
* hex nybble table.
*/
DUK_INTERNAL const duk_uint8_t duk_lc_digits[36] = {
DUK_ASC_0, DUK_ASC_1, DUK_ASC_2, DUK_ASC_3,
DUK_ASC_4, DUK_ASC_5, DUK_ASC_6, DUK_ASC_7,
DUK_ASC_8, DUK_ASC_9, DUK_ASC_LC_A, DUK_ASC_LC_B,
DUK_ASC_LC_C, DUK_ASC_LC_D, DUK_ASC_LC_E, DUK_ASC_LC_F,
DUK_ASC_LC_G, DUK_ASC_LC_H, DUK_ASC_LC_I, DUK_ASC_LC_J,
DUK_ASC_LC_K, DUK_ASC_LC_L, DUK_ASC_LC_M, DUK_ASC_LC_N,
DUK_ASC_LC_O, DUK_ASC_LC_P, DUK_ASC_LC_Q, DUK_ASC_LC_R,
DUK_ASC_LC_S, DUK_ASC_LC_T, DUK_ASC_LC_U, DUK_ASC_LC_V,
DUK_ASC_LC_W, DUK_ASC_LC_X, DUK_ASC_LC_Y, DUK_ASC_LC_Z
};
DUK_INTERNAL const duk_uint8_t duk_uc_nybbles[16] = {
DUK_ASC_0, DUK_ASC_1, DUK_ASC_2, DUK_ASC_3,
DUK_ASC_4, DUK_ASC_5, DUK_ASC_6, DUK_ASC_7,
DUK_ASC_8, DUK_ASC_9, DUK_ASC_UC_A, DUK_ASC_UC_B,
DUK_ASC_UC_C, DUK_ASC_UC_D, DUK_ASC_UC_E, DUK_ASC_UC_F
};
/*
* Table for hex decoding ASCII hex digits
*/
DUK_INTERNAL const duk_int8_t duk_hex_dectab[256] = {
/* -1 if invalid */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x00-0x0f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x10-0x1f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x20-0x2f */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1, /* 0x30-0x3f */
-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x40-0x4f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x50-0x5f */
-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x60-0x6f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x70-0x7f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x80-0x8f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x90-0x9f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xa0-0xaf */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xb0-0xbf */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xc0-0xcf */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xd0-0xdf */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xe0-0xef */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 /* 0xf0-0xff */
};
#if defined(DUK_USE_HEX_FASTPATH)
/* Preshifted << 4. Must use 16-bit entry to allow negative value signaling. */
DUK_INTERNAL const duk_int16_t duk_hex_dectab_shift4[256] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x00-0x0f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x10-0x1f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x20-0x2f */
0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70, 0x80, 0x90, -1, -1, -1, -1, -1, -1, /* 0x30-0x3f */
-1, 0xa0, 0xb0, 0xc0, 0xd0, 0xe0, 0xf0, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x40-0x4f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x50-0x5f */
-1, 0xa0, 0xb0, 0xc0, 0xd0, 0xe0, 0xf0, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x60-0x6f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x70-0x7f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x80-0x8f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x90-0x9f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xa0-0xaf */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xb0-0xbf */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xc0-0xcf */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xd0-0xdf */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xe0-0xef */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 /* 0xf0-0xff */
};
#endif
/*
* Table for hex encoding bytes
*/
#if defined(DUK_USE_HEX_FASTPATH)
/* Lookup to encode one byte directly into 2 characters:
*
* def genhextab(bswap):
* for i in xrange(256):
* t = chr(i).encode('hex')
* if bswap:
* t = t[1] + t[0]
* print('0x' + t.encode('hex') + 'U')
* print('big endian'); genhextab(False)
* print('little endian'); genhextab(True)
*/
DUK_INTERNAL const duk_uint16_t duk_hex_enctab[256] = {
#if defined(DUK_USE_INTEGER_BE)
0x3030U, 0x3031U, 0x3032U, 0x3033U, 0x3034U, 0x3035U, 0x3036U, 0x3037U,
0x3038U, 0x3039U, 0x3061U, 0x3062U, 0x3063U, 0x3064U, 0x3065U, 0x3066U,
0x3130U, 0x3131U, 0x3132U, 0x3133U, 0x3134U, 0x3135U, 0x3136U, 0x3137U,
0x3138U, 0x3139U, 0x3161U, 0x3162U, 0x3163U, 0x3164U, 0x3165U, 0x3166U,
0x3230U, 0x3231U, 0x3232U, 0x3233U, 0x3234U, 0x3235U, 0x3236U, 0x3237U,
0x3238U, 0x3239U, 0x3261U, 0x3262U, 0x3263U, 0x3264U, 0x3265U, 0x3266U,
0x3330U, 0x3331U, 0x3332U, 0x3333U, 0x3334U, 0x3335U, 0x3336U, 0x3337U,
0x3338U, 0x3339U, 0x3361U, 0x3362U, 0x3363U, 0x3364U, 0x3365U, 0x3366U,
0x3430U, 0x3431U, 0x3432U, 0x3433U, 0x3434U, 0x3435U, 0x3436U, 0x3437U,
0x3438U, 0x3439U, 0x3461U, 0x3462U, 0x3463U, 0x3464U, 0x3465U, 0x3466U,
0x3530U, 0x3531U, 0x3532U, 0x3533U, 0x3534U, 0x3535U, 0x3536U, 0x3537U,
0x3538U, 0x3539U, 0x3561U, 0x3562U, 0x3563U, 0x3564U, 0x3565U, 0x3566U,
0x3630U, 0x3631U, 0x3632U, 0x3633U, 0x3634U, 0x3635U, 0x3636U, 0x3637U,
0x3638U, 0x3639U, 0x3661U, 0x3662U, 0x3663U, 0x3664U, 0x3665U, 0x3666U,
0x3730U, 0x3731U, 0x3732U, 0x3733U, 0x3734U, 0x3735U, 0x3736U, 0x3737U,
0x3738U, 0x3739U, 0x3761U, 0x3762U, 0x3763U, 0x3764U, 0x3765U, 0x3766U,
0x3830U, 0x3831U, 0x3832U, 0x3833U, 0x3834U, 0x3835U, 0x3836U, 0x3837U,
0x3838U, 0x3839U, 0x3861U, 0x3862U, 0x3863U, 0x3864U, 0x3865U, 0x3866U,
0x3930U, 0x3931U, 0x3932U, 0x3933U, 0x3934U, 0x3935U, 0x3936U, 0x3937U,
0x3938U, 0x3939U, 0x3961U, 0x3962U, 0x3963U, 0x3964U, 0x3965U, 0x3966U,
0x6130U, 0x6131U, 0x6132U, 0x6133U, 0x6134U, 0x6135U, 0x6136U, 0x6137U,
0x6138U, 0x6139U, 0x6161U, 0x6162U, 0x6163U, 0x6164U, 0x6165U, 0x6166U,
0x6230U, 0x6231U, 0x6232U, 0x6233U, 0x6234U, 0x6235U, 0x6236U, 0x6237U,
0x6238U, 0x6239U, 0x6261U, 0x6262U, 0x6263U, 0x6264U, 0x6265U, 0x6266U,
0x6330U, 0x6331U, 0x6332U, 0x6333U, 0x6334U, 0x6335U, 0x6336U, 0x6337U,
0x6338U, 0x6339U, 0x6361U, 0x6362U, 0x6363U, 0x6364U, 0x6365U, 0x6366U,
0x6430U, 0x6431U, 0x6432U, 0x6433U, 0x6434U, 0x6435U, 0x6436U, 0x6437U,
0x6438U, 0x6439U, 0x6461U, 0x6462U, 0x6463U, 0x6464U, 0x6465U, 0x6466U,
0x6530U, 0x6531U, 0x6532U, 0x6533U, 0x6534U, 0x6535U, 0x6536U, 0x6537U,
0x6538U, 0x6539U, 0x6561U, 0x6562U, 0x6563U, 0x6564U, 0x6565U, 0x6566U,
0x6630U, 0x6631U, 0x6632U, 0x6633U, 0x6634U, 0x6635U, 0x6636U, 0x6637U,
0x6638U, 0x6639U, 0x6661U, 0x6662U, 0x6663U, 0x6664U, 0x6665U, 0x6666U
#else /* DUK_USE_INTEGER_BE */
0x3030U, 0x3130U, 0x3230U, 0x3330U, 0x3430U, 0x3530U, 0x3630U, 0x3730U,
0x3830U, 0x3930U, 0x6130U, 0x6230U, 0x6330U, 0x6430U, 0x6530U, 0x6630U,
0x3031U, 0x3131U, 0x3231U, 0x3331U, 0x3431U, 0x3531U, 0x3631U, 0x3731U,
0x3831U, 0x3931U, 0x6131U, 0x6231U, 0x6331U, 0x6431U, 0x6531U, 0x6631U,
0x3032U, 0x3132U, 0x3232U, 0x3332U, 0x3432U, 0x3532U, 0x3632U, 0x3732U,
0x3832U, 0x3932U, 0x6132U, 0x6232U, 0x6332U, 0x6432U, 0x6532U, 0x6632U,
0x3033U, 0x3133U, 0x3233U, 0x3333U, 0x3433U, 0x3533U, 0x3633U, 0x3733U,
0x3833U, 0x3933U, 0x6133U, 0x6233U, 0x6333U, 0x6433U, 0x6533U, 0x6633U,
0x3034U, 0x3134U, 0x3234U, 0x3334U, 0x3434U, 0x3534U, 0x3634U, 0x3734U,
0x3834U, 0x3934U, 0x6134U, 0x6234U, 0x6334U, 0x6434U, 0x6534U, 0x6634U,
0x3035U, 0x3135U, 0x3235U, 0x3335U, 0x3435U, 0x3535U, 0x3635U, 0x3735U,
0x3835U, 0x3935U, 0x6135U, 0x6235U, 0x6335U, 0x6435U, 0x6535U, 0x6635U,
0x3036U, 0x3136U, 0x3236U, 0x3336U, 0x3436U, 0x3536U, 0x3636U, 0x3736U,
0x3836U, 0x3936U, 0x6136U, 0x6236U, 0x6336U, 0x6436U, 0x6536U, 0x6636U,
0x3037U, 0x3137U, 0x3237U, 0x3337U, 0x3437U, 0x3537U, 0x3637U, 0x3737U,
0x3837U, 0x3937U, 0x6137U, 0x6237U, 0x6337U, 0x6437U, 0x6537U, 0x6637U,
0x3038U, 0x3138U, 0x3238U, 0x3338U, 0x3438U, 0x3538U, 0x3638U, 0x3738U,
0x3838U, 0x3938U, 0x6138U, 0x6238U, 0x6338U, 0x6438U, 0x6538U, 0x6638U,
0x3039U, 0x3139U, 0x3239U, 0x3339U, 0x3439U, 0x3539U, 0x3639U, 0x3739U,
0x3839U, 0x3939U, 0x6139U, 0x6239U, 0x6339U, 0x6439U, 0x6539U, 0x6639U,
0x3061U, 0x3161U, 0x3261U, 0x3361U, 0x3461U, 0x3561U, 0x3661U, 0x3761U,
0x3861U, 0x3961U, 0x6161U, 0x6261U, 0x6361U, 0x6461U, 0x6561U, 0x6661U,
0x3062U, 0x3162U, 0x3262U, 0x3362U, 0x3462U, 0x3562U, 0x3662U, 0x3762U,
0x3862U, 0x3962U, 0x6162U, 0x6262U, 0x6362U, 0x6462U, 0x6562U, 0x6662U,
0x3063U, 0x3163U, 0x3263U, 0x3363U, 0x3463U, 0x3563U, 0x3663U, 0x3763U,
0x3863U, 0x3963U, 0x6163U, 0x6263U, 0x6363U, 0x6463U, 0x6563U, 0x6663U,
0x3064U, 0x3164U, 0x3264U, 0x3364U, 0x3464U, 0x3564U, 0x3664U, 0x3764U,
0x3864U, 0x3964U, 0x6164U, 0x6264U, 0x6364U, 0x6464U, 0x6564U, 0x6664U,
0x3065U, 0x3165U, 0x3265U, 0x3365U, 0x3465U, 0x3565U, 0x3665U, 0x3765U,
0x3865U, 0x3965U, 0x6165U, 0x6265U, 0x6365U, 0x6465U, 0x6565U, 0x6665U,
0x3066U, 0x3166U, 0x3266U, 0x3366U, 0x3466U, 0x3566U, 0x3666U, 0x3766U,
0x3866U, 0x3966U, 0x6166U, 0x6266U, 0x6366U, 0x6466U, 0x6566U, 0x6666U
#endif /* DUK_USE_INTEGER_BE */
};
#endif /* DUK_USE_HEX_FASTPATH */
/*
* Table for base-64 encoding
*/
#if defined(DUK_USE_BASE64_FASTPATH)
DUK_INTERNAL const duk_uint8_t duk_base64_enctab[64] = {
0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, /* A...P */
0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, /* Q...f */
0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, /* g...v */
0x77, 0x78, 0x79, 0x7a, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x2b, 0x2f /* w.../ */
};
#endif /* DUK_USE_BASE64_FASTPATH */
/*
* Table for base-64 decoding
*/
#if defined(DUK_USE_BASE64_FASTPATH)
DUK_INTERNAL const duk_int8_t duk_base64_dectab[256] = {
/* -1 = error, -2 = allowed whitespace, -3 = padding ('='), 0...63 decoded bytes */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -2, -2, -1, -1, -2, -1, -1, /* 0x00...0x0f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x10...0x1f */
-2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, /* 0x20...0x2f */
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -3, -1, -1, /* 0x30...0x3f */
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, /* 0x40...0x4f */
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, /* 0x50...0x5f */
-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, /* 0x60...0x6f */
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1, /* 0x70...0x7f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x80...0x8f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x90...0x9f */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xa0...0xaf */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xb0...0xbf */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xc0...0xcf */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xd0...0xdf */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xe0...0xef */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 /* 0xf0...0xff */
};
#endif /* DUK_USE_BASE64_FASTPATH */
/*
* Arbitrary byteswap for potentially unaligned values
*
* Used to byteswap pointers e.g. in debugger code.
*/
#if defined(DUK_USE_DEBUGGER_SUPPORT) /* For now only needed by the debugger. */
DUK_INTERNAL void duk_byteswap_bytes(duk_uint8_t *p, duk_small_uint_t len) {
duk_uint8_t tmp;
duk_uint8_t *q = p + len - 1;
while (p - q < 0) {
tmp = *p;
*p = *q;
*q = tmp;
p++;
q--;
}
}
#endif
#line 1 "duk_util_hashprime.c"
/*
* Round a number upwards to a prime (not usually the nearest one).
*
* Uses a table of successive 32-bit primes whose ratio is roughly
* constant. This keeps the relative upwards 'rounding error' bounded
* and the data size small. A simple 'predict-correct' compression is
* used to compress primes to one byte per prime. See genhashsizes.py
* for details.
*
* The minimum prime returned here must be coordinated with the possible
* probe sequence steps in duk_hobject and duk_heap stringtable.
*/
/* include removed: duk_internal.h */
/* Awkward inclusion condition: drop out of compilation if not needed by any
* call site: object hash part or probing stringtable.
*/
#if defined(DUK_USE_HOBJECT_HASH_PART) || defined(DUK_USE_STRTAB_PROBE)
/* hash size ratio goal, must match genhashsizes.py */
#define DUK__HASH_SIZE_RATIO 1177 /* floor(1.15 * (1 << 10)) */
/* prediction corrections for prime list (see genhashsizes.py) */
DUK_LOCAL const duk_int8_t duk__hash_size_corrections[] = {
17, /* minimum prime */
4, 3, 4, 1, 4, 1, 1, 2, 2, 2, 2, 1, 6, 6, 9, 5, 1, 2, 2, 5, 1, 3, 3, 3,
5, 4, 4, 2, 4, 8, 3, 4, 23, 2, 4, 7, 8, 11, 2, 12, 15, 10, 1, 1, 5, 1, 5,
8, 9, 17, 14, 10, 7, 5, 2, 46, 21, 1, 9, 9, 4, 4, 10, 23, 36, 6, 20, 29,
18, 6, 19, 21, 16, 11, 5, 5, 48, 9, 1, 39, 14, 8, 4, 29, 9, 1, 15, 48, 12,
22, 6, 15, 27, 4, 2, 17, 28, 8, 9, 4, 5, 8, 3, 3, 8, 37, 11, 15, 8, 30,
43, 6, 33, 41, 5, 20, 32, 41, 38, 24, 77, 14, 19, 11, 4, 35, 18, 19, 41,
10, 23, 16, 9, 2,
-1
};
/* probe steps (see genhashsizes.py), currently assumed to be 32 entries long
* (DUK_UTIL_GET_HASH_PROBE_STEP macro).
*/
DUK_INTERNAL duk_uint8_t duk_util_probe_steps[32] = {
2, 3, 5, 7, 11, 13, 19, 31, 41, 47, 59, 67, 73, 79, 89, 101, 103, 107,
109, 127, 137, 139, 149, 157, 163, 167, 173, 181, 191, 193, 197, 199
};
DUK_INTERNAL duk_uint32_t duk_util_get_hash_prime(duk_uint32_t size) {
const duk_int8_t *p = duk__hash_size_corrections;
duk_uint32_t curr;
curr = (duk_uint32_t) *p++;
for (;;) {
duk_small_int_t t = (duk_small_int_t) *p++;
if (t < 0) {
/* may happen if size is very close to 2^32-1 */
break;
}
/* prediction: portable variant using doubles if 64-bit values not available */
#ifdef DUK_USE_64BIT_OPS
curr = (duk_uint32_t) ((((duk_uint64_t) curr) * ((duk_uint64_t) DUK__HASH_SIZE_RATIO)) >> 10);
#else
/* 32-bit x 11-bit = 43-bit, fits accurately into a double */
curr = (duk_uint32_t) DUK_FLOOR(((double) curr) * ((double) DUK__HASH_SIZE_RATIO) / 1024.0);
#endif
/* correction */
curr += t;
DUK_DDD(DUK_DDDPRINT("size=%ld, curr=%ld", (long) size, (long) curr));
if (curr >= size) {
return curr;
}
}
return 0;
}
#endif /* DUK_USE_HOBJECT_HASH_PART || DUK_USE_STRTAB_PROBE */
#line 1 "duk_hobject_class.c"
/*
* Hobject Ecmascript [[Class]].
*/
/* include removed: duk_internal.h */
#if (DUK_STRIDX_UC_ARGUMENTS > 255)
#error constant too large
#endif
#if (DUK_STRIDX_ARRAY > 255)
#error constant too large
#endif
#if (DUK_STRIDX_UC_BOOLEAN > 255)
#error constant too large
#endif
#if (DUK_STRIDX_DATE > 255)
#error constant too large
#endif
#if (DUK_STRIDX_UC_ERROR > 255)
#error constant too large
#endif
#if (DUK_STRIDX_UC_FUNCTION > 255)
#error constant too large
#endif
#if (DUK_STRIDX_JSON > 255)
#error constant too large
#endif
#if (DUK_STRIDX_MATH > 255)
#error constant too large
#endif
#if (DUK_STRIDX_UC_NUMBER > 255)
#error constant too large
#endif
#if (DUK_STRIDX_UC_OBJECT > 255)
#error constant too large
#endif
#if (DUK_STRIDX_REG_EXP > 255)
#error constant too large
#endif
#if (DUK_STRIDX_UC_STRING > 255)
#error constant too large
#endif
#if (DUK_STRIDX_GLOBAL > 255)
#error constant too large
#endif
#if (DUK_STRIDX_OBJ_ENV > 255)
#error constant too large
#endif
#if (DUK_STRIDX_DEC_ENV > 255)
#error constant too large
#endif
#if (DUK_STRIDX_UC_BUFFER > 255)
#error constant too large
#endif
#if (DUK_STRIDX_UC_POINTER > 255)
#error constant too large
#endif
#if (DUK_STRIDX_UC_THREAD > 255)
#error constant too large
#endif
#if (DUK_STRIDX_ARRAY_BUFFER > 255)
#error constant too large
#endif
#if (DUK_STRIDX_DATA_VIEW > 255)
#error constant too large
#endif
#if (DUK_STRIDX_INT8_ARRAY > 255)
#error constant too large
#endif
#if (DUK_STRIDX_UINT8_ARRAY > 255)
#error constant too large
#endif
#if (DUK_STRIDX_UINT8_CLAMPED_ARRAY > 255)
#error constant too large
#endif
#if (DUK_STRIDX_INT16_ARRAY > 255)
#error constant too large
#endif
#if (DUK_STRIDX_UINT16_ARRAY > 255)
#error constant too large
#endif
#if (DUK_STRIDX_INT32_ARRAY > 255)
#error constant too large
#endif
#if (DUK_STRIDX_UINT32_ARRAY > 255)
#error constant too large
#endif
#if (DUK_STRIDX_FLOAT32_ARRAY > 255)
#error constant too large
#endif
#if (DUK_STRIDX_FLOAT64_ARRAY > 255)
#error constant too large
#endif
#if (DUK_STRIDX_EMPTY_STRING > 255)
#error constant too large
#endif
/* Note: assumes that these string indexes are 8-bit, genstrings.py must ensure that */
DUK_INTERNAL duk_uint8_t duk_class_number_to_stridx[32] = {
DUK_STRIDX_EMPTY_STRING, /* UNUSED, intentionally empty */
DUK_STRIDX_UC_ARGUMENTS,
DUK_STRIDX_ARRAY,
DUK_STRIDX_UC_BOOLEAN,
DUK_STRIDX_DATE,
DUK_STRIDX_UC_ERROR,
DUK_STRIDX_UC_FUNCTION,
DUK_STRIDX_JSON,
DUK_STRIDX_MATH,
DUK_STRIDX_UC_NUMBER,
DUK_STRIDX_UC_OBJECT,
DUK_STRIDX_REG_EXP,
DUK_STRIDX_UC_STRING,
DUK_STRIDX_GLOBAL,
DUK_STRIDX_OBJ_ENV,
DUK_STRIDX_DEC_ENV,
DUK_STRIDX_UC_BUFFER,
DUK_STRIDX_UC_POINTER,
DUK_STRIDX_UC_THREAD,
DUK_STRIDX_ARRAY_BUFFER,
DUK_STRIDX_DATA_VIEW,
DUK_STRIDX_INT8_ARRAY,
DUK_STRIDX_UINT8_ARRAY,
DUK_STRIDX_UINT8_CLAMPED_ARRAY,
DUK_STRIDX_INT16_ARRAY,
DUK_STRIDX_UINT16_ARRAY,
DUK_STRIDX_INT32_ARRAY,
DUK_STRIDX_UINT32_ARRAY,
DUK_STRIDX_FLOAT32_ARRAY,
DUK_STRIDX_FLOAT64_ARRAY,
DUK_STRIDX_EMPTY_STRING, /* UNUSED, intentionally empty */
DUK_STRIDX_EMPTY_STRING, /* UNUSED, intentionally empty */
};
#line 1 "duk_alloc_default.c"
/*
* Default allocation functions.
*
* Assumes behavior such as malloc allowing zero size, yielding
* a NULL or a unique pointer which is a no-op for free.
*/
/* include removed: duk_internal.h */
#if defined(DUK_USE_PROVIDE_DEFAULT_ALLOC_FUNCTIONS)
DUK_INTERNAL void *duk_default_alloc_function(void *udata, duk_size_t size) {
void *res;
DUK_UNREF(udata);
res = DUK_ANSI_MALLOC(size);
DUK_DDD(DUK_DDDPRINT("default alloc function: %lu -> %p",
(unsigned long) size, (void *) res));
return res;
}
DUK_INTERNAL void *duk_default_realloc_function(void *udata, void *ptr, duk_size_t newsize) {
void *res;
DUK_UNREF(udata);
res = DUK_ANSI_REALLOC(ptr, newsize);
DUK_DDD(DUK_DDDPRINT("default realloc function: %p %lu -> %p",
(void *) ptr, (unsigned long) newsize, (void *) res));
return res;
}
DUK_INTERNAL void duk_default_free_function(void *udata, void *ptr) {
DUK_DDD(DUK_DDDPRINT("default free function: %p", (void *) ptr));
DUK_UNREF(udata);
DUK_ANSI_FREE(ptr);
}
#endif /* DUK_USE_PROVIDE_DEFAULT_ALLOC_FUNCTIONS */
#line 1 "duk_api_buffer.c"
/*
* Buffer
*/
/* include removed: duk_internal.h */
DUK_EXTERNAL void *duk_resize_buffer(duk_context *ctx, duk_idx_t index, duk_size_t new_size) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hbuffer_dynamic *h;
DUK_ASSERT_CTX_VALID(ctx);
h = (duk_hbuffer_dynamic *) duk_require_hbuffer(ctx, index);
DUK_ASSERT(h != NULL);
if (!(DUK_HBUFFER_HAS_DYNAMIC(h) && !DUK_HBUFFER_HAS_EXTERNAL(h))) {
DUK_ERROR_TYPE(thr, DUK_STR_WRONG_BUFFER_TYPE);
}
/* maximum size check is handled by callee */
duk_hbuffer_resize(thr, h, new_size);
return DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, h);
}
DUK_EXTERNAL void *duk_steal_buffer(duk_context *ctx, duk_idx_t index, duk_size_t *out_size) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hbuffer_dynamic *h;
void *ptr;
duk_size_t sz;
DUK_ASSERT(ctx != NULL);
h = (duk_hbuffer_dynamic *) duk_require_hbuffer(ctx, index);
DUK_ASSERT(h != NULL);
if (!(DUK_HBUFFER_HAS_DYNAMIC(h) && !DUK_HBUFFER_HAS_EXTERNAL(h))) {
DUK_ERROR_TYPE(thr, DUK_STR_WRONG_BUFFER_TYPE);
}
/* Forget the previous allocation, setting size to 0 and alloc to
* NULL. Caller is responsible for freeing the previous allocation.
* Getting the allocation and clearing it is done in the same API
* call to avoid any chance of a realloc.
*/
ptr = DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, h);
sz = DUK_HBUFFER_DYNAMIC_GET_SIZE(h);
if (out_size) {
*out_size = sz;
}
DUK_HBUFFER_DYNAMIC_SET_DATA_PTR_NULL(thr->heap, h);
DUK_HBUFFER_DYNAMIC_SET_SIZE(h, 0);
return ptr;
}
DUK_EXTERNAL void duk_config_buffer(duk_context *ctx, duk_idx_t index, void *ptr, duk_size_t len) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hbuffer_external *h;
DUK_ASSERT(ctx != NULL);
h = (duk_hbuffer_external *) duk_require_hbuffer(ctx, index);
DUK_ASSERT(h != NULL);
if (!DUK_HBUFFER_HAS_EXTERNAL(h)) {
DUK_ERROR_TYPE(thr, DUK_STR_WRONG_BUFFER_TYPE);
}
DUK_ASSERT(DUK_HBUFFER_HAS_DYNAMIC(h));
DUK_HBUFFER_EXTERNAL_SET_DATA_PTR(thr->heap, h, ptr);
DUK_HBUFFER_EXTERNAL_SET_SIZE(h, len);
}
#line 1 "duk_api_bytecode.c"
/*
* Bytecode dump/load
*
* The bytecode load primitive is more important performance-wise than the
* dump primitive.
*
* Unlike most Duktape API calls, bytecode dump/load is not guaranteed to be
* memory safe for invalid arguments - caller beware! There's little point
* in trying to achieve memory safety unless bytecode instructions are also
* validated which is not easy to do with indirect register references etc.
*/
/* include removed: duk_internal.h */
#if defined(DUK_USE_BYTECODE_DUMP_SUPPORT)
#define DUK__SER_MARKER 0xff
#define DUK__SER_VERSION 0x00
#define DUK__SER_STRING 0x00
#define DUK__SER_NUMBER 0x01
#define DUK__BYTECODE_INITIAL_ALLOC 256
/*
* Dump/load helpers, xxx_raw() helpers do no buffer checks
*/
DUK_LOCAL duk_uint8_t *duk__load_string_raw(duk_context *ctx, duk_uint8_t *p) {
duk_uint32_t len;
len = DUK_RAW_READ_U32_BE(p);
duk_push_lstring(ctx, (const char *) p, len);
p += len;
return p;
}
DUK_LOCAL duk_uint8_t *duk__load_buffer_raw(duk_context *ctx, duk_uint8_t *p) {
duk_uint32_t len;
duk_uint8_t *buf;
len = DUK_RAW_READ_U32_BE(p);
buf = (duk_uint8_t *) duk_push_fixed_buffer(ctx, (duk_size_t) len);
DUK_ASSERT(buf != NULL);
DUK_MEMCPY((void *) buf, (const void *) p, (size_t) len);
p += len;
return p;
}
DUK_LOCAL duk_uint8_t *duk__dump_hstring_raw(duk_uint8_t *p, duk_hstring *h) {
duk_size_t len;
duk_uint32_t tmp32;
DUK_ASSERT(h != NULL);
len = DUK_HSTRING_GET_BYTELEN(h);
DUK_ASSERT(len <= 0xffffffffUL); /* string limits */
tmp32 = (duk_uint32_t) len;
DUK_RAW_WRITE_U32_BE(p, tmp32);
DUK_MEMCPY((void *) p,
(const void *) DUK_HSTRING_GET_DATA(h),
len);
p += len;
return p;
}
DUK_LOCAL duk_uint8_t *duk__dump_hbuffer_raw(duk_hthread *thr, duk_uint8_t *p, duk_hbuffer *h) {
duk_size_t len;
duk_uint32_t tmp32;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(h != NULL);
DUK_UNREF(thr);
len = DUK_HBUFFER_GET_SIZE(h);
DUK_ASSERT(len <= 0xffffffffUL); /* buffer limits */
tmp32 = (duk_uint32_t) len;
DUK_RAW_WRITE_U32_BE(p, tmp32);
DUK_MEMCPY((void *) p,
(const void *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h),
len);
p += len;
return p;
}
DUK_LOCAL duk_uint8_t *duk__dump_string_prop(duk_hthread *thr, duk_uint8_t *p, duk_bufwriter_ctx *bw_ctx, duk_hobject *func, duk_small_uint_t stridx) {
duk_hstring *h_str;
duk_tval *tv;
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, (duk_hobject *) func, DUK_HTHREAD_GET_STRING(thr, stridx));
if (tv != NULL && DUK_TVAL_IS_STRING(tv)) {
h_str = DUK_TVAL_GET_STRING(tv);
DUK_ASSERT(h_str != NULL);
} else {
h_str = DUK_HTHREAD_STRING_EMPTY_STRING(thr);
DUK_ASSERT(h_str != NULL);
}
DUK_ASSERT(DUK_HSTRING_MAX_BYTELEN <= 0x7fffffffUL); /* ensures no overflow */
p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4 + DUK_HSTRING_GET_BYTELEN(h_str), p);
p = duk__dump_hstring_raw(p, h_str);
return p;
}
DUK_LOCAL duk_uint8_t *duk__dump_buffer_prop(duk_hthread *thr, duk_uint8_t *p, duk_bufwriter_ctx *bw_ctx, duk_hobject *func, duk_small_uint_t stridx) {
duk_tval *tv;
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, (duk_hobject *) func, DUK_HTHREAD_GET_STRING(thr, stridx));
if (tv != NULL && DUK_TVAL_IS_BUFFER(tv)) {
duk_hbuffer *h_buf;
h_buf = DUK_TVAL_GET_BUFFER(tv);
DUK_ASSERT(h_buf != NULL);
DUK_ASSERT(DUK_HBUFFER_MAX_BYTELEN <= 0x7fffffffUL); /* ensures no overflow */
p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4 + DUK_HBUFFER_GET_SIZE(h_buf), p);
p = duk__dump_hbuffer_raw(thr, p, h_buf);
} else {
p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4, p);
DUK_RAW_WRITE_U32_BE(p, 0);
}
return p;
}
DUK_LOCAL duk_uint8_t *duk__dump_uint32_prop(duk_hthread *thr, duk_uint8_t *p, duk_bufwriter_ctx *bw_ctx, duk_hobject *func, duk_small_uint_t stridx, duk_uint32_t def_value) {
duk_tval *tv;
duk_uint32_t val;
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, (duk_hobject *) func, DUK_HTHREAD_GET_STRING(thr, stridx));
if (tv != NULL && DUK_TVAL_IS_NUMBER(tv)) {
val = (duk_uint32_t) DUK_TVAL_GET_NUMBER(tv);
} else {
val = def_value;
}
p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4, p);
DUK_RAW_WRITE_U32_BE(p, val);
return p;
}
DUK_LOCAL duk_uint8_t *duk__dump_varmap(duk_hthread *thr, duk_uint8_t *p, duk_bufwriter_ctx *bw_ctx, duk_hobject *func) {
duk_tval *tv;
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, (duk_hobject *) func, DUK_HTHREAD_STRING_INT_VARMAP(thr));
if (tv != NULL && DUK_TVAL_IS_OBJECT(tv)) {
duk_hobject *h;
duk_uint_fast32_t i;
h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
/* We know _Varmap only has own properties so walk property
* table directly. We also know _Varmap is dense and all
* values are numbers; assert for these. GC and finalizers
* shouldn't affect _Varmap so side effects should be fine.
*/
for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(h); i++) {
duk_hstring *key;
duk_tval *tv_val;
duk_uint32_t val;
key = DUK_HOBJECT_E_GET_KEY(thr->heap, h, i);
DUK_ASSERT(key != NULL); /* _Varmap is dense */
DUK_ASSERT(!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, h, i));
tv_val = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, h, i);
DUK_ASSERT(tv_val != NULL);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_val)); /* known to be number; in fact an integer */
#if defined(DUK_USE_FASTINT)
DUK_ASSERT(DUK_TVAL_IS_FASTINT(tv_val));
DUK_ASSERT(DUK_TVAL_GET_FASTINT(tv_val) == (duk_int64_t) DUK_TVAL_GET_FASTINT_U32(tv_val)); /* known to be 32-bit */
val = DUK_TVAL_GET_FASTINT_U32(tv_val);
#else
val = (duk_uint32_t) DUK_TVAL_GET_NUMBER(tv_val);
#endif
DUK_ASSERT(DUK_HSTRING_MAX_BYTELEN <= 0x7fffffffUL); /* ensures no overflow */
p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4 + DUK_HSTRING_GET_BYTELEN(key) + 4, p);
p = duk__dump_hstring_raw(p, key);
DUK_RAW_WRITE_U32_BE(p, val);
}
}
p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4, p);
DUK_RAW_WRITE_U32_BE(p, 0); /* end of _Varmap */
return p;
}
DUK_LOCAL duk_uint8_t *duk__dump_formals(duk_hthread *thr, duk_uint8_t *p, duk_bufwriter_ctx *bw_ctx, duk_hobject *func) {
duk_tval *tv;
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, (duk_hobject *) func, DUK_HTHREAD_STRING_INT_FORMALS(thr));
if (tv != NULL && DUK_TVAL_IS_OBJECT(tv)) {
duk_hobject *h;
duk_uint_fast32_t i;
h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
/* We know _Formals is dense and all entries will be in the
* array part. GC and finalizers shouldn't affect _Formals
* so side effects should be fine.
*/
for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ASIZE(h); i++) {
duk_tval *tv_val;
duk_hstring *varname;
tv_val = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, h, i);
DUK_ASSERT(tv_val != NULL);
if (DUK_TVAL_IS_STRING(tv_val)) {
/* Array is dense and contains only strings, but ASIZE may
* be larger than used part and there are UNUSED entries.
*/
varname = DUK_TVAL_GET_STRING(tv_val);
DUK_ASSERT(varname != NULL);
DUK_ASSERT(DUK_HSTRING_MAX_BYTELEN <= 0x7fffffffUL); /* ensures no overflow */
p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4 + DUK_HSTRING_GET_BYTELEN(varname), p);
p = duk__dump_hstring_raw(p, varname);
}
}
}
p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4, p);
DUK_RAW_WRITE_U32_BE(p, 0); /* end of _Formals */
return p;
}
static duk_uint8_t *duk__dump_func(duk_context *ctx, duk_hcompiledfunction *func, duk_bufwriter_ctx *bw_ctx, duk_uint8_t *p) {
duk_hthread *thr;
duk_tval *tv, *tv_end;
duk_instr_t *ins, *ins_end;
duk_hobject **fn, **fn_end;
duk_hstring *h_str;
duk_uint32_t count_instr;
duk_uint32_t tmp32;
duk_uint16_t tmp16;
duk_double_t d;
thr = (duk_hthread *) ctx;
DUK_UNREF(ctx);
DUK_UNREF(thr);
DUK_DD(DUK_DDPRINT("dumping function %p to %p: "
"consts=[%p,%p[ (%ld bytes, %ld items), "
"funcs=[%p,%p[ (%ld bytes, %ld items), "
"code=[%p,%p[ (%ld bytes, %ld items)",
(void *) func,
(void *) p,
(void *) DUK_HCOMPILEDFUNCTION_GET_CONSTS_BASE(thr->heap, func),
(void *) DUK_HCOMPILEDFUNCTION_GET_CONSTS_END(thr->heap, func),
(long) DUK_HCOMPILEDFUNCTION_GET_CONSTS_SIZE(thr->heap, func),
(long) DUK_HCOMPILEDFUNCTION_GET_CONSTS_COUNT(thr->heap, func),
(void *) DUK_HCOMPILEDFUNCTION_GET_FUNCS_BASE(thr->heap, func),
(void *) DUK_HCOMPILEDFUNCTION_GET_FUNCS_END(thr->heap, func),
(long) DUK_HCOMPILEDFUNCTION_GET_FUNCS_SIZE(thr->heap, func),
(long) DUK_HCOMPILEDFUNCTION_GET_FUNCS_COUNT(thr->heap, func),
(void *) DUK_HCOMPILEDFUNCTION_GET_CODE_BASE(thr->heap, func),
(void *) DUK_HCOMPILEDFUNCTION_GET_CODE_END(thr->heap, func),
(long) DUK_HCOMPILEDFUNCTION_GET_CODE_SIZE(thr->heap, func),
(long) DUK_HCOMPILEDFUNCTION_GET_CODE_COUNT(thr->heap, func)));
DUK_ASSERT(DUK_USE_ESBC_MAX_BYTES <= 0x7fffffffUL); /* ensures no overflow */
count_instr = (duk_uint32_t) DUK_HCOMPILEDFUNCTION_GET_CODE_COUNT(thr->heap, func);
p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 3 * 4 + 2 * 2 + 3 * 4 + count_instr * 4, p);
/* Fixed header info. */
tmp32 = count_instr;
DUK_RAW_WRITE_U32_BE(p, tmp32);
tmp32 = (duk_uint32_t) DUK_HCOMPILEDFUNCTION_GET_CONSTS_COUNT(thr->heap, func);
DUK_RAW_WRITE_U32_BE(p, tmp32);
tmp32 = (duk_uint32_t) DUK_HCOMPILEDFUNCTION_GET_FUNCS_COUNT(thr->heap, func);
DUK_RAW_WRITE_U32_BE(p, tmp32);
tmp16 = func->nregs;
DUK_RAW_WRITE_U16_BE(p, tmp16);
tmp16 = func->nargs;
DUK_RAW_WRITE_U16_BE(p, tmp16);
#if defined(DUK_USE_DEBUGGER_SUPPORT)
tmp32 = func->start_line;
DUK_RAW_WRITE_U32_BE(p, tmp32);
tmp32 = func->end_line;
DUK_RAW_WRITE_U32_BE(p, tmp32);
#else
DUK_RAW_WRITE_U32_BE(p, 0);
DUK_RAW_WRITE_U32_BE(p, 0);
#endif
tmp32 = ((duk_heaphdr *) func)->h_flags & DUK_HEAPHDR_FLAGS_FLAG_MASK;
DUK_RAW_WRITE_U32_BE(p, tmp32);
/* Bytecode instructions: endian conversion needed unless
* platform is big endian.
*/
ins = DUK_HCOMPILEDFUNCTION_GET_CODE_BASE(thr->heap, func);
ins_end = DUK_HCOMPILEDFUNCTION_GET_CODE_END(thr->heap, func);
DUK_ASSERT((duk_size_t) (ins_end - ins) == (duk_size_t) count_instr);
#if defined(DUK_USE_INTEGER_BE)
DUK_MEMCPY((void *) p, (const void *) ins, (size_t) (ins_end - ins));
p += (size_t) (ins_end - ins);
#else
while (ins != ins_end) {
tmp32 = (duk_uint32_t) (*ins);
DUK_RAW_WRITE_U32_BE(p, tmp32);
ins++;
}
#endif
/* Constants: variable size encoding. */
tv = DUK_HCOMPILEDFUNCTION_GET_CONSTS_BASE(thr->heap, func);
tv_end = DUK_HCOMPILEDFUNCTION_GET_CONSTS_END(thr->heap, func);
while (tv != tv_end) {
/* constants are strings or numbers now */
DUK_ASSERT(DUK_TVAL_IS_STRING(tv) ||
DUK_TVAL_IS_NUMBER(tv));
if (DUK_TVAL_IS_STRING(tv)) {
h_str = DUK_TVAL_GET_STRING(tv);
DUK_ASSERT(h_str != NULL);
DUK_ASSERT(DUK_HSTRING_MAX_BYTELEN <= 0x7fffffffUL); /* ensures no overflow */
p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 1 + 4 + DUK_HSTRING_GET_BYTELEN(h_str), p),
*p++ = DUK__SER_STRING;
p = duk__dump_hstring_raw(p, h_str);
} else {
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 1 + 8, p);
*p++ = DUK__SER_NUMBER;
d = DUK_TVAL_GET_NUMBER(tv);
DUK_RAW_WRITE_DOUBLE_BE(p, d);
}
tv++;
}
/* Inner functions recursively. */
fn = (duk_hobject **) DUK_HCOMPILEDFUNCTION_GET_FUNCS_BASE(thr->heap, func);
fn_end = (duk_hobject **) DUK_HCOMPILEDFUNCTION_GET_FUNCS_END(thr->heap, func);
while (fn != fn_end) {
/* XXX: This causes recursion up to inner function depth
* which is normally not an issue, e.g. mark-and-sweep uses
* a recursion limiter to avoid C stack issues. Avoiding
* this would mean some sort of a work list or just refusing
* to serialize deep functions.
*/
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION(*fn));
p = duk__dump_func(ctx, (duk_hcompiledfunction *) *fn, bw_ctx, p);
fn++;
}
/* Object extra properties.
*
* There are some difference between function templates and functions.
* For example, function templates don't have .length and nargs is
* normally used to instantiate the functions.
*/
p = duk__dump_uint32_prop(thr, p, bw_ctx, (duk_hobject *) func, DUK_STRIDX_LENGTH, (duk_uint32_t) func->nargs);
p = duk__dump_string_prop(thr, p, bw_ctx, (duk_hobject *) func, DUK_STRIDX_NAME);
p = duk__dump_string_prop(thr, p, bw_ctx, (duk_hobject *) func, DUK_STRIDX_FILE_NAME);
p = duk__dump_buffer_prop(thr, p, bw_ctx, (duk_hobject *) func, DUK_STRIDX_INT_PC2LINE);
p = duk__dump_varmap(thr, p, bw_ctx, (duk_hobject *) func);
p = duk__dump_formals(thr, p, bw_ctx, (duk_hobject *) func);
DUK_DD(DUK_DDPRINT("serialized function %p -> final pointer %p", (void *) func, (void *) p));
return p;
}
/* Load a function from bytecode. The function object returned here must
* match what is created by duk_js_push_closure() with respect to its flags,
* properties, etc.
*
* NOTE: there are intentionally no input buffer length / bound checks.
* Adding them would be easy but wouldn't ensure memory safety as untrusted
* or broken bytecode is unsafe during execution unless the opcodes themselves
* are validated (which is quite complex, especially for indirect opcodes).
*/
#define DUK__ASSERT_LEFT(n) do { \
DUK_ASSERT((duk_size_t) (p_end - p) >= (duk_size_t) (n)); \
} while (0)
static duk_uint8_t *duk__load_func(duk_context *ctx, duk_uint8_t *p, duk_uint8_t *p_end) {
duk_hthread *thr;
duk_hcompiledfunction *h_fun;
duk_hbuffer *h_data;
duk_size_t data_size;
duk_uint32_t count_instr, count_const, count_funcs;
duk_uint32_t n;
duk_uint32_t tmp32;
duk_small_uint_t const_type;
duk_uint8_t *fun_data;
duk_uint8_t *q;
duk_idx_t idx_base;
duk_tval *tv1;
duk_uarridx_t arr_idx;
/* XXX: There's some overlap with duk_js_closure() here, but
* seems difficult to share code. Ensure that the final function
* looks the same as created by duk_js_closure().
*/
DUK_ASSERT(ctx != NULL);
thr = (duk_hthread *) ctx;
DUK_DD(DUK_DDPRINT("loading function, p=%p, p_end=%p", (void *) p, (void *) p_end));
DUK__ASSERT_LEFT(3 * 4);
count_instr = DUK_RAW_READ_U32_BE(p);
count_const = DUK_RAW_READ_U32_BE(p);
count_funcs = DUK_RAW_READ_U32_BE(p);
data_size = sizeof(duk_tval) * count_const +
sizeof(duk_hobject *) * count_funcs +
sizeof(duk_instr_t) * count_instr;
DUK_DD(DUK_DDPRINT("instr=%ld, const=%ld, funcs=%ld, data_size=%ld",
(long) count_instr, (long) count_const,
(long) count_const, (long) data_size));
/* Value stack is used to ensure reachability of constants and
* inner functions being loaded. Require enough space to handle
* large functions correctly.
*/
duk_require_stack(ctx, 2 + count_const + count_funcs);
idx_base = duk_get_top(ctx);
/* Push function object, init flags etc. This must match
* duk_js_push_closure() quite carefully.
*/
duk_push_compiledfunction(ctx);
h_fun = duk_get_hcompiledfunction(ctx, -1);
DUK_ASSERT(h_fun != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION((duk_hobject *) h_fun));
DUK_ASSERT(DUK_HCOMPILEDFUNCTION_GET_DATA(thr->heap, h_fun) == NULL);
DUK_ASSERT(DUK_HCOMPILEDFUNCTION_GET_FUNCS(thr->heap, h_fun) == NULL);
DUK_ASSERT(DUK_HCOMPILEDFUNCTION_GET_BYTECODE(thr->heap, h_fun) == NULL);
h_fun->nregs = DUK_RAW_READ_U16_BE(p);
h_fun->nargs = DUK_RAW_READ_U16_BE(p);
#if defined(DUK_USE_DEBUGGER_SUPPORT)
h_fun->start_line = DUK_RAW_READ_U32_BE(p);
h_fun->end_line = DUK_RAW_READ_U32_BE(p);
#else
p += 8; /* skip line info */
#endif
/* duk_hcompiledfunction flags; quite version specific */
tmp32 = DUK_RAW_READ_U32_BE(p);
DUK_HEAPHDR_SET_FLAGS((duk_heaphdr *) h_fun, tmp32);
/* standard prototype */
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, &h_fun->obj, thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]);
/* assert just a few critical flags */
DUK_ASSERT(DUK_HEAPHDR_GET_TYPE((duk_heaphdr *) h_fun) == DUK_HTYPE_OBJECT);
DUK_ASSERT(!DUK_HOBJECT_HAS_BOUND(&h_fun->obj));
DUK_ASSERT(DUK_HOBJECT_HAS_COMPILEDFUNCTION(&h_fun->obj));
DUK_ASSERT(!DUK_HOBJECT_HAS_NATIVEFUNCTION(&h_fun->obj));
DUK_ASSERT(!DUK_HOBJECT_HAS_THREAD(&h_fun->obj));
DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARRAY(&h_fun->obj));
DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(&h_fun->obj));
DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(&h_fun->obj));
/* Create function 'data' buffer but don't attach it yet. */
fun_data = (duk_uint8_t *) duk_push_fixed_buffer(ctx, data_size);
DUK_ASSERT(fun_data != NULL);
/* Load bytecode instructions. */
DUK_ASSERT(sizeof(duk_instr_t) == 4);
DUK__ASSERT_LEFT(count_instr * sizeof(duk_instr_t));
#if defined(DUK_USE_INTEGER_BE)
q = fun_data + sizeof(duk_tval) * count_const + sizeof(duk_hobject *) * count_funcs;
DUK_MEMCPY((void *) q,
(const void *) p,
sizeof(duk_instr_t) * count_instr);
p += sizeof(duk_instr_t) * count_instr;
#else
q = fun_data + sizeof(duk_tval) * count_const + sizeof(duk_hobject *) * count_funcs;
for (n = count_instr; n > 0; n--) {
*((duk_instr_t *) (void *) q) = DUK_RAW_READ_U32_BE(p);
q += sizeof(duk_instr_t);
}
#endif
/* Load constants onto value stack but don't yet copy to buffer. */
for (n = count_const; n > 0; n--) {
DUK__ASSERT_LEFT(1);
const_type = DUK_RAW_READ_U8(p);
switch (const_type) {
case DUK__SER_STRING: {
p = duk__load_string_raw(ctx, p);
break;
}
case DUK__SER_NUMBER: {
/* Important to do a fastint check so that constants are
* properly read back as fastints.
*/
duk_tval tv_tmp;
duk_double_t val;
DUK__ASSERT_LEFT(8);
val = DUK_RAW_READ_DOUBLE_BE(p);
DUK_TVAL_SET_NUMBER_CHKFAST(&tv_tmp, val);
duk_push_tval(ctx, &tv_tmp);
break;
}
default: {
goto format_error;
}
}
}
/* Load inner functions to value stack, but don't yet copy to buffer. */
for (n = count_funcs; n > 0; n--) {
p = duk__load_func(ctx, p, p_end);
if (p == NULL) {
goto format_error;
}
}
/* With constants and inner functions on value stack, we can now
* atomically finish the function 'data' buffer, bump refcounts,
* etc.
*
* Here we take advantage of the value stack being just a duk_tval
* array: we can just memcpy() the constants as long as we incref
* them afterwards.
*/
h_data = (duk_hbuffer *) duk_get_hbuffer(ctx, idx_base + 1);
DUK_ASSERT(h_data != NULL);
DUK_ASSERT(!DUK_HBUFFER_HAS_DYNAMIC(h_data));
DUK_HCOMPILEDFUNCTION_SET_DATA(thr->heap, h_fun, h_data);
DUK_HBUFFER_INCREF(thr, h_data);
tv1 = duk_get_tval(ctx, idx_base + 2); /* may be NULL if no constants or inner funcs */
DUK_ASSERT((count_const == 0 && count_funcs == 0) || tv1 != NULL);
q = fun_data;
if (count_const > 0) {
/* Explicit zero size check to avoid NULL 'tv1'. */
DUK_MEMCPY((void *) q, (const void *) tv1, sizeof(duk_tval) * count_const);
for (n = count_const; n > 0; n--) {
DUK_TVAL_INCREF_FAST(thr, (duk_tval *) (void *) q); /* no side effects */
q += sizeof(duk_tval);
}
tv1 += count_const;
}
DUK_HCOMPILEDFUNCTION_SET_FUNCS(thr->heap, h_fun, (duk_hobject **) (void *) q);
for (n = count_funcs; n > 0; n--) {
duk_hobject *h_obj;
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv1));
h_obj = DUK_TVAL_GET_OBJECT(tv1);
DUK_ASSERT(h_obj != NULL);
tv1++;
DUK_HOBJECT_INCREF(thr, h_obj);
*((duk_hobject **) (void *) q) = h_obj;
q += sizeof(duk_hobject *);
}
DUK_HCOMPILEDFUNCTION_SET_BYTECODE(thr->heap, h_fun, (duk_instr_t *) (void *) q);
/* The function object is now reachable and refcounts are fine,
* so we can pop off all the temporaries.
*/
DUK_DDD(DUK_DDDPRINT("function is reachable, reset top; func: %!iT", duk_get_tval(ctx, idx_base)));
duk_set_top(ctx, idx_base + 1);
/* Setup function properties. */
tmp32 = DUK_RAW_READ_U32_BE(p);
duk_push_u32(ctx, tmp32);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_NONE);
p = duk__load_string_raw(ctx, p);
if (DUK_HOBJECT_HAS_NAMEBINDING((duk_hobject *) h_fun)) {
/* Original function instance/template had NAMEBINDING.
* Must create a lexical environment on loading to allow
* recursive functions like 'function foo() { foo(); }'.
*/
duk_hobject *proto;
proto = thr->builtins[DUK_BIDX_GLOBAL_ENV];
(void) duk_push_object_helper_proto(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_DECENV),
proto);
duk_dup(ctx, -2); /* -> [ func funcname env funcname ] */
duk_dup(ctx, idx_base); /* -> [ func funcname env funcname func ] */
duk_xdef_prop(ctx, -3, DUK_PROPDESC_FLAGS_NONE); /* -> [ func funcname env ] */
duk_xdef_prop_stridx(ctx, idx_base, DUK_STRIDX_INT_LEXENV, DUK_PROPDESC_FLAGS_WC);
/* since closure has NEWENV, never define DUK_STRIDX_INT_VARENV, as it
* will be ignored anyway
*/
}
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_NONE);
p = duk__load_string_raw(ctx, p);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_FILE_NAME, DUK_PROPDESC_FLAGS_WC);
duk_push_object(ctx);
duk_dup(ctx, -2);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_CONSTRUCTOR, DUK_PROPDESC_FLAGS_WC); /* func.prototype.constructor = func */
duk_compact(ctx, -1);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_PROTOTYPE, DUK_PROPDESC_FLAGS_W);
p = duk__load_buffer_raw(ctx, p);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_PC2LINE, DUK_PROPDESC_FLAGS_WC);
duk_push_object(ctx); /* _Varmap */
for (;;) {
/* XXX: awkward */
p = duk__load_string_raw(ctx, p);
if (duk_get_length(ctx, -1) == 0) {
duk_pop(ctx);
break;
}
tmp32 = DUK_RAW_READ_U32_BE(p);
duk_push_u32(ctx, tmp32);
duk_put_prop(ctx, -3);
}
duk_compact(ctx, -1);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_VARMAP, DUK_PROPDESC_FLAGS_NONE);
duk_push_array(ctx); /* _Formals */
for (arr_idx = 0; ; arr_idx++) {
/* XXX: awkward */
p = duk__load_string_raw(ctx, p);
if (duk_get_length(ctx, -1) == 0) {
duk_pop(ctx);
break;
}
duk_put_prop_index(ctx, -2, arr_idx);
}
duk_compact(ctx, -1);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_FORMALS, DUK_PROPDESC_FLAGS_NONE);
/* Return with final function pushed on stack top. */
DUK_DD(DUK_DDPRINT("final loaded function: %!iT", duk_get_tval(ctx, -1)));
DUK_ASSERT_TOP(ctx, idx_base + 1);
return p;
format_error:
return NULL;
}
DUK_EXTERNAL void duk_dump_function(duk_context *ctx) {
duk_hthread *thr;
duk_hcompiledfunction *func;
duk_bufwriter_ctx bw_ctx_alloc;
duk_bufwriter_ctx *bw_ctx = &bw_ctx_alloc;
duk_uint8_t *p;
DUK_ASSERT(ctx != NULL);
thr = (duk_hthread *) ctx;
/* Bound functions don't have all properties so we'd either need to
* lookup the non-bound target function or reject bound functions.
* For now, bound functions are rejected.
*/
func = duk_require_hcompiledfunction(ctx, -1);
DUK_ASSERT(func != NULL);
DUK_ASSERT(!DUK_HOBJECT_HAS_BOUND(&func->obj));
/* Estimating the result size beforehand would be costly, so
* start with a reasonable size and extend as needed.
*/
DUK_BW_INIT_PUSHBUF(thr, bw_ctx, DUK__BYTECODE_INITIAL_ALLOC);
p = DUK_BW_GET_PTR(thr, bw_ctx);
*p++ = DUK__SER_MARKER;
*p++ = DUK__SER_VERSION;
p = duk__dump_func(ctx, func, bw_ctx, p);
DUK_BW_SET_PTR(thr, bw_ctx, p);
DUK_BW_COMPACT(thr, bw_ctx);
DUK_DD(DUK_DDPRINT("serialized result: %!T", duk_get_tval(ctx, -1)));
duk_remove(ctx, -2); /* [ ... func buf ] -> [ ... buf ] */
}
DUK_EXTERNAL void duk_load_function(duk_context *ctx) {
duk_hthread *thr;
duk_uint8_t *p_buf, *p, *p_end;
duk_size_t sz;
DUK_ASSERT(ctx != NULL);
thr = (duk_hthread *) ctx;
DUK_UNREF(ctx);
p_buf = (duk_uint8_t *) duk_require_buffer(ctx, -1, &sz);
DUK_ASSERT(p_buf != NULL);
/* The caller is responsible for being sure that bytecode being loaded
* is valid and trusted. Invalid bytecode can cause memory unsafe
* behavior directly during loading or later during bytecode execution
* (instruction validation would be quite complex to implement).
*
* This signature check is the only sanity check for detecting
* accidental invalid inputs. The initial 0xFF byte ensures no
* ordinary string will be accepted by accident.
*/
p = p_buf;
p_end = p_buf + sz;
if (sz < 2 || p[0] != DUK__SER_MARKER || p[1] != DUK__SER_VERSION) {
goto format_error;
}
p += 2;
p = duk__load_func(ctx, p, p_end);
if (p == NULL) {
goto format_error;
}
duk_remove(ctx, -2); /* [ ... buf func ] -> [ ... func ] */
return;
format_error:
DUK_ERROR_TYPE(thr, DUK_STR_DECODE_FAILED);
}
#undef DUK__SER_MARKER
#undef DUK__SER_VERSION
#undef DUK__SER_STRING
#undef DUK__SER_NUMBER
#undef DUK__BYTECODE_INITIAL_ALLOC
#else /* DUK_USE_BYTECODE_DUMP_SUPPORT */
DUK_EXTERNAL void duk_dump_function(duk_context *ctx) {
DUK_ERROR_UNSUPPORTED_DEFMSG((duk_hthread *) ctx);
}
DUK_EXTERNAL void duk_load_function(duk_context *ctx) {
DUK_ERROR_UNSUPPORTED_DEFMSG((duk_hthread *) ctx);
}
#endif /* DUK_USE_BYTECODE_DUMP_SUPPORT */
#line 1 "duk_api_call.c"
/*
* Calls.
*
* Protected variants should avoid ever throwing an error.
*/
/* include removed: duk_internal.h */
/* Prepare value stack for a method call through an object property.
* May currently throw an error e.g. when getting the property.
*/
DUK_LOCAL void duk__call_prop_prep_stack(duk_context *ctx, duk_idx_t normalized_obj_index, duk_idx_t nargs) {
DUK_ASSERT_CTX_VALID(ctx);
DUK_DDD(DUK_DDDPRINT("duk__call_prop_prep_stack, normalized_obj_index=%ld, nargs=%ld, stacktop=%ld",
(long) normalized_obj_index, (long) nargs, (long) duk_get_top(ctx)));
/* [... key arg1 ... argN] */
/* duplicate key */
duk_dup(ctx, -nargs - 1); /* Note: -nargs alone would fail for nargs == 0, this is OK */
duk_get_prop(ctx, normalized_obj_index);
DUK_DDD(DUK_DDDPRINT("func: %!T", (duk_tval *) duk_get_tval(ctx, -1)));
/* [... key arg1 ... argN func] */
duk_replace(ctx, -nargs - 2);
/* [... func arg1 ... argN] */
duk_dup(ctx, normalized_obj_index);
duk_insert(ctx, -nargs - 1);
/* [... func this arg1 ... argN] */
}
DUK_EXTERNAL void duk_call(duk_context *ctx, duk_idx_t nargs) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_small_uint_t call_flags;
duk_idx_t idx_func;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr != NULL);
idx_func = duk_get_top(ctx) - nargs - 1;
if (idx_func < 0 || nargs < 0) {
/* note that we can't reliably pop anything here */
DUK_ERROR_API(thr, DUK_STR_INVALID_CALL_ARGS);
}
/* XXX: awkward; we assume there is space for this, overwrite
* directly instead?
*/
duk_push_undefined(ctx);
duk_insert(ctx, idx_func + 1);
call_flags = 0; /* not protected, respect reclimit, not constructor */
duk_handle_call_unprotected(thr, /* thread */
nargs, /* num_stack_args */
call_flags); /* call_flags */
}
DUK_EXTERNAL void duk_call_method(duk_context *ctx, duk_idx_t nargs) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_small_uint_t call_flags;
duk_idx_t idx_func;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr != NULL);
idx_func = duk_get_top(ctx) - nargs - 2; /* must work for nargs <= 0 */
if (idx_func < 0 || nargs < 0) {
/* note that we can't reliably pop anything here */
DUK_ERROR_API(thr, DUK_STR_INVALID_CALL_ARGS);
}
call_flags = 0; /* not protected, respect reclimit, not constructor */
duk_handle_call_unprotected(thr, /* thread */
nargs, /* num_stack_args */
call_flags); /* call_flags */
}
DUK_EXTERNAL void duk_call_prop(duk_context *ctx, duk_idx_t obj_index, duk_idx_t nargs) {
/*
* XXX: if duk_handle_call() took values through indices, this could be
* made much more sensible. However, duk_handle_call() needs to fudge
* the 'this' and 'func' values to handle bound function chains, which
* is now done "in-place", so this is not a trivial change.
*/
DUK_ASSERT_CTX_VALID(ctx);
obj_index = duk_require_normalize_index(ctx, obj_index); /* make absolute */
duk__call_prop_prep_stack(ctx, obj_index, nargs);
duk_call_method(ctx, nargs);
}
DUK_EXTERNAL duk_int_t duk_pcall(duk_context *ctx, duk_idx_t nargs) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_small_uint_t call_flags;
duk_idx_t idx_func;
duk_int_t rc;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr != NULL);
idx_func = duk_get_top(ctx) - nargs - 1; /* must work for nargs <= 0 */
if (idx_func < 0 || nargs < 0) {
/* We can't reliably pop anything here because the stack input
* shape is incorrect. So we throw an error; if the caller has
* no catch point for this, a fatal error will occur. Another
* alternative would be to just return an error. But then the
* stack would be in an unknown state which might cause some
* very hard to diagnose problems later on. Also note that even
* if we did not throw an error here, the underlying call handler
* might STILL throw an out-of-memory error or some other internal
* fatal error.
*/
DUK_ERROR_API(thr, DUK_STR_INVALID_CALL_ARGS);
return DUK_EXEC_ERROR; /* unreachable */
}
/* awkward; we assume there is space for this */
duk_push_undefined(ctx);
duk_insert(ctx, idx_func + 1);
call_flags = 0; /* respect reclimit, not constructor */
rc = duk_handle_call_protected(thr, /* thread */
nargs, /* num_stack_args */
call_flags); /* call_flags */
return rc;
}
DUK_EXTERNAL duk_int_t duk_pcall_method(duk_context *ctx, duk_idx_t nargs) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_small_uint_t call_flags;
duk_idx_t idx_func;
duk_int_t rc;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr != NULL);
idx_func = duk_get_top(ctx) - nargs - 2; /* must work for nargs <= 0 */
if (idx_func < 0 || nargs < 0) {
/* See comments in duk_pcall(). */
DUK_ERROR_API(thr, DUK_STR_INVALID_CALL_ARGS);
return DUK_EXEC_ERROR; /* unreachable */
}
call_flags = 0; /* respect reclimit, not constructor */
rc = duk_handle_call_protected(thr, /* thread */
nargs, /* num_stack_args */
call_flags); /* call_flags */
return rc;
}
DUK_LOCAL duk_ret_t duk__pcall_prop_raw(duk_context *ctx) {
duk_idx_t obj_index;
duk_idx_t nargs;
/* Get the original arguments. Note that obj_index may be a relative
* index so the stack must have the same top when we use it.
*/
DUK_ASSERT_CTX_VALID(ctx);
obj_index = (duk_idx_t) duk_get_int(ctx, -2);
nargs = (duk_idx_t) duk_get_int(ctx, -1);
duk_pop_2(ctx);
obj_index = duk_require_normalize_index(ctx, obj_index); /* make absolute */
duk__call_prop_prep_stack(ctx, obj_index, nargs);
duk_call_method(ctx, nargs);
return 1;
}
DUK_EXTERNAL duk_int_t duk_pcall_prop(duk_context *ctx, duk_idx_t obj_index, duk_idx_t nargs) {
/*
* Must be careful to catch errors related to value stack manipulation
* and property lookup, not just the call itself.
*/
DUK_ASSERT_CTX_VALID(ctx);
duk_push_idx(ctx, obj_index);
duk_push_idx(ctx, nargs);
/* Inputs: explicit arguments (nargs), +1 for key, +2 for obj_index/nargs passing.
* If the value stack does not contain enough args, an error is thrown; this matches
* behavior of the other protected call API functions.
*/
return duk_safe_call(ctx, duk__pcall_prop_raw, nargs + 1 + 2 /*nargs*/, 1 /*nrets*/);
}
DUK_EXTERNAL duk_int_t duk_safe_call(duk_context *ctx, duk_safe_call_function func, duk_idx_t nargs, duk_idx_t nrets) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_int_t rc;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr != NULL);
if (duk_get_top(ctx) < nargs || nrets < 0) {
/* See comments in duk_pcall(). */
DUK_ERROR_API(thr, DUK_STR_INVALID_CALL_ARGS);
return DUK_EXEC_ERROR; /* unreachable */
}
rc = duk_handle_safe_call(thr, /* thread */
func, /* func */
nargs, /* num_stack_args */
nrets); /* num_stack_res */
return rc;
}
DUK_EXTERNAL void duk_new(duk_context *ctx, duk_idx_t nargs) {
/*
* There are two [[Construct]] operations in the specification:
*
* - E5 Section 13.2.2: for Function objects
* - E5 Section 15.3.4.5.2: for "bound" Function objects
*
* The chain of bound functions is resolved in Section 15.3.4.5.2,
* with arguments "piling up" until the [[Construct]] internal
* method is called on the final, actual Function object. Note
* that the "prototype" property is looked up *only* from the
* final object, *before* calling the constructor.
*
* Currently we follow the bound function chain here to get the
* "prototype" property value from the final, non-bound function.
* However, we let duk_handle_call() handle the argument "piling"
* when the constructor is called. The bound function chain is
* thus now processed twice.
*
* When constructing new Array instances, an unnecessary object is
* created and discarded now: the standard [[Construct]] creates an
* object, and calls the Array constructor. The Array constructor
* returns an Array instance, which is used as the result value for
* the "new" operation; the object created before the Array constructor
* call is discarded.
*
* This would be easy to fix, e.g. by knowing that the Array constructor
* will always create a replacement object and skip creating the fallback
* object in that case.
*
* Note: functions called via "new" need to know they are called as a
* constructor. For instance, built-in constructors behave differently
* depending on how they are called.
*/
/* XXX: merge this with duk_js_call.c, as this function implements
* core semantics (or perhaps merge the two files altogether).
*/
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *proto;
duk_hobject *cons;
duk_hobject *fallback;
duk_idx_t idx_cons;
duk_small_uint_t call_flags;
DUK_ASSERT_CTX_VALID(ctx);
/* [... constructor arg1 ... argN] */
idx_cons = duk_require_normalize_index(ctx, -nargs - 1);
DUK_DDD(DUK_DDDPRINT("top=%ld, nargs=%ld, idx_cons=%ld",
(long) duk_get_top(ctx), (long) nargs, (long) idx_cons));
/* XXX: code duplication */
/*
* Figure out the final, non-bound constructor, to get "prototype"
* property.
*/
duk_dup(ctx, idx_cons);
for (;;) {
duk_tval *tv;
tv = DUK_GET_TVAL_NEGIDX(ctx, -1);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_OBJECT(tv)) {
cons = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(cons != NULL);
if (!DUK_HOBJECT_IS_CALLABLE(cons) || !DUK_HOBJECT_HAS_CONSTRUCTABLE(cons)) {
/* Checking callability of the immediate target
* is important, same for constructability.
* Checking it for functions down the bound
* function chain is not strictly necessary
* because .bind() should normally reject them.
* But it's good to check anyway because it's
* technically possible to edit the bound function
* chain via internal keys.
*/
goto not_constructable;
}
if (!DUK_HOBJECT_HAS_BOUND(cons)) {
break;
}
} else if (DUK_TVAL_IS_LIGHTFUNC(tv)) {
/* Lightfuncs cannot be bound. */
break;
} else {
/* Anything else is not constructable. */
goto not_constructable;
}
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_TARGET); /* -> [... cons target] */
duk_remove(ctx, -2); /* -> [... target] */
}
DUK_ASSERT(duk_is_callable(ctx, -1));
DUK_ASSERT(duk_is_lightfunc(ctx, -1) ||
(duk_get_hobject(ctx, -1) != NULL && !DUK_HOBJECT_HAS_BOUND(duk_get_hobject(ctx, -1))));
/* [... constructor arg1 ... argN final_cons] */
/*
* Create "fallback" object to be used as the object instance,
* unless the constructor returns a replacement value.
* Its internal prototype needs to be set based on "prototype"
* property of the constructor.
*/
duk_push_object(ctx); /* class Object, extensible */
/* [... constructor arg1 ... argN final_cons fallback] */
duk_get_prop_stridx(ctx, -2, DUK_STRIDX_PROTOTYPE);
proto = duk_get_hobject(ctx, -1);
if (!proto) {
DUK_DDD(DUK_DDDPRINT("constructor has no 'prototype' property, or value not an object "
"-> leave standard Object prototype as fallback prototype"));
} else {
DUK_DDD(DUK_DDDPRINT("constructor has 'prototype' property with object value "
"-> set fallback prototype to that value: %!iO", (duk_heaphdr *) proto));
fallback = duk_get_hobject(ctx, -2);
DUK_ASSERT(fallback != NULL);
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, fallback, proto);
}
duk_pop(ctx);
/* [... constructor arg1 ... argN final_cons fallback] */
/*
* Manipulate callstack for the call.
*/
duk_dup_top(ctx);
duk_insert(ctx, idx_cons + 1); /* use fallback as 'this' value */
duk_insert(ctx, idx_cons); /* also stash it before constructor,
* in case we need it (as the fallback value)
*/
duk_pop(ctx); /* pop final_cons */
/* [... fallback constructor fallback(this) arg1 ... argN];
* Note: idx_cons points to first 'fallback', not 'constructor'.
*/
DUK_DDD(DUK_DDDPRINT("before call, idx_cons+1 (constructor) -> %!T, idx_cons+2 (fallback/this) -> %!T, "
"nargs=%ld, top=%ld",
(duk_tval *) duk_get_tval(ctx, idx_cons + 1),
(duk_tval *) duk_get_tval(ctx, idx_cons + 2),
(long) nargs,
(long) duk_get_top(ctx)));
/*
* Call the constructor function (called in "constructor mode").
*/
call_flags = DUK_CALL_FLAG_CONSTRUCTOR_CALL; /* not protected, respect reclimit, is a constructor call */
duk_handle_call_unprotected(thr, /* thread */
nargs, /* num_stack_args */
call_flags); /* call_flags */
/* [... fallback retval] */
DUK_DDD(DUK_DDDPRINT("constructor call finished, fallback=%!iT, retval=%!iT",
(duk_tval *) duk_get_tval(ctx, -2),
(duk_tval *) duk_get_tval(ctx, -1)));
/*
* Determine whether to use the constructor return value as the created
* object instance or not.
*/
if (duk_is_object(ctx, -1)) {
duk_remove(ctx, -2);
} else {
duk_pop(ctx);
}
/*
* Augment created errors upon creation (not when they are thrown or
* rethrown). __FILE__ and __LINE__ are not desirable here; the call
* stack reflects the caller which is correct.
*/
#ifdef DUK_USE_AUGMENT_ERROR_CREATE
duk_hthread_sync_currpc(thr);
duk_err_augment_error_create(thr, thr, NULL, 0, 1 /*noblame_fileline*/);
#endif
/* [... retval] */
return;
not_constructable:
DUK_ERROR_TYPE(thr, DUK_STR_NOT_CONSTRUCTABLE);
}
DUK_LOCAL duk_ret_t duk__pnew_helper(duk_context *ctx) {
duk_uint_t nargs;
nargs = duk_to_uint(ctx, -1);
duk_pop(ctx);
duk_new(ctx, nargs);
return 1;
}
DUK_EXTERNAL duk_int_t duk_pnew(duk_context *ctx, duk_idx_t nargs) {
duk_int_t rc;
DUK_ASSERT_CTX_VALID(ctx);
/* For now, just use duk_safe_call() to wrap duk_new(). We can't
* simply use a protected duk_handle_call() because there's post
* processing which might throw. It should be possible to ensure
* the post processing never throws (except in internal errors and
* out of memory etc which are always allowed) and then remove this
* wrapper.
*/
duk_push_uint(ctx, nargs);
rc = duk_safe_call(ctx, duk__pnew_helper, nargs + 2 /*nargs*/, 1 /*nrets*/);
return rc;
}
DUK_EXTERNAL duk_bool_t duk_is_constructor_call(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_activation *act;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr != NULL);
DUK_ASSERT_DISABLE(thr->callstack_top >= 0);
act = duk_hthread_get_current_activation(thr);
DUK_ASSERT(act != NULL); /* because callstack_top > 0 */
return ((act->flags & DUK_ACT_FLAG_CONSTRUCT) != 0 ? 1 : 0);
}
DUK_EXTERNAL duk_bool_t duk_is_strict_call(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_activation *act;
/* For user code this could just return 1 (strict) always
* because all Duktape/C functions are considered strict,
* and strict is also the default when nothing is running.
* However, Duktape may call this function internally when
* the current activation is an Ecmascript function, so
* this cannot be replaced by a 'return 1' without fixing
* the internal call sites.
*/
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr != NULL);
DUK_ASSERT_DISABLE(thr->callstack_top >= 0);
act = duk_hthread_get_current_activation(thr);
if (act == NULL) {
/* Strict by default. */
return 1;
}
return ((act->flags & DUK_ACT_FLAG_STRICT) != 0 ? 1 : 0);
}
/*
* Duktape/C function magic
*/
DUK_EXTERNAL duk_int_t duk_get_current_magic(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_activation *act;
duk_hobject *func;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr != NULL);
DUK_ASSERT_DISABLE(thr->callstack_top >= 0);
act = duk_hthread_get_current_activation(thr);
if (act) {
func = DUK_ACT_GET_FUNC(act);
if (!func) {
duk_tval *tv = &act->tv_func;
duk_small_uint_t lf_flags;
lf_flags = DUK_TVAL_GET_LIGHTFUNC_FLAGS(tv);
return (duk_int_t) DUK_LFUNC_FLAGS_GET_MAGIC(lf_flags);
}
DUK_ASSERT(func != NULL);
if (DUK_HOBJECT_IS_NATIVEFUNCTION(func)) {
duk_hnativefunction *nf = (duk_hnativefunction *) func;
return (duk_int_t) nf->magic;
}
}
return 0;
}
DUK_EXTERNAL duk_int_t duk_get_magic(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
duk_hobject *h;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_require_tval(ctx, index);
if (DUK_TVAL_IS_OBJECT(tv)) {
h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
if (!DUK_HOBJECT_HAS_NATIVEFUNCTION(h)) {
goto type_error;
}
return (duk_int_t) ((duk_hnativefunction *) h)->magic;
} else if (DUK_TVAL_IS_LIGHTFUNC(tv)) {
duk_small_uint_t lf_flags = DUK_TVAL_GET_LIGHTFUNC_FLAGS(tv);
return (duk_int_t) DUK_LFUNC_FLAGS_GET_MAGIC(lf_flags);
}
/* fall through */
type_error:
DUK_ERROR_TYPE(thr, DUK_STR_UNEXPECTED_TYPE);
return 0;
}
DUK_EXTERNAL void duk_set_magic(duk_context *ctx, duk_idx_t index, duk_int_t magic) {
duk_hnativefunction *nf;
DUK_ASSERT_CTX_VALID(ctx);
nf = duk_require_hnativefunction(ctx, index);
DUK_ASSERT(nf != NULL);
nf->magic = (duk_int16_t) magic;
}
#line 1 "duk_api_codec.c"
/*
* Encoding and decoding basic formats: hex, base64.
*
* These are in-place operations which may allow an optimized implementation.
*
* Base-64: https://tools.ietf.org/html/rfc4648#section-4
*/
/* include removed: duk_internal.h */
/* Shared handling for encode/decode argument. Fast path handling for
* buffer and string values because they're the most common. In particular,
* avoid creating a temporary string or buffer when possible.
*/
DUK_LOCAL const duk_uint8_t *duk__prep_codec_arg(duk_context *ctx, duk_idx_t index, duk_size_t *out_len) {
DUK_ASSERT(duk_is_valid_index(ctx, index)); /* checked by caller */
if (duk_is_buffer(ctx, index)) {
return (const duk_uint8_t *) duk_get_buffer(ctx, index, out_len);
} else {
return (const duk_uint8_t *) duk_to_lstring(ctx, index, out_len);
}
}
#if defined(DUK_USE_BASE64_FASTPATH)
DUK_LOCAL void duk__base64_encode_helper(const duk_uint8_t *src, duk_size_t srclen, duk_uint8_t *dst) {
duk_uint_t t;
duk_size_t n_full, n_full3, n_final;
const duk_uint8_t *src_end_fast;
n_full = srclen / 3; /* full 3-byte -> 4-char conversions */
n_full3 = n_full * 3;
n_final = srclen - n_full3;
DUK_ASSERT_DISABLE(n_final >= 0);
DUK_ASSERT(n_final <= 2);
src_end_fast = src + n_full3;
while (DUK_UNLIKELY(src != src_end_fast)) {
t = (duk_uint_t) (*src++);
t = (t << 8) + (duk_uint_t) (*src++);
t = (t << 8) + (duk_uint_t) (*src++);
*dst++ = duk_base64_enctab[t >> 18];
*dst++ = duk_base64_enctab[(t >> 12) & 0x3f];
*dst++ = duk_base64_enctab[(t >> 6) & 0x3f];
*dst++ = duk_base64_enctab[t & 0x3f];
#if 0 /* Tested: not faster on x64 */
/* aaaaaabb bbbbcccc ccdddddd */
dst[0] = duk_base64_enctab[(src[0] >> 2) & 0x3f];
dst[1] = duk_base64_enctab[((src[0] << 4) & 0x30) | ((src[1] >> 4) & 0x0f)];
dst[2] = duk_base64_enctab[((src[1] << 2) & 0x3f) | ((src[2] >> 6) & 0x03)];
dst[3] = duk_base64_enctab[src[2] & 0x3f];
src += 3; dst += 4;
#endif
}
switch (n_final) {
/* case 0: nop */
case 1: {
/* XX== */
t = (duk_uint_t) (*src++);
*dst++ = duk_base64_enctab[t >> 2]; /* XXXXXX-- */
*dst++ = duk_base64_enctab[(t << 4) & 0x3f]; /* ------XX */
*dst++ = DUK_ASC_EQUALS;
*dst++ = DUK_ASC_EQUALS;
break;
}
case 2: {
/* XXX= */
t = (duk_uint_t) (*src++);
t = (t << 8) + (duk_uint_t) (*src++);
*dst++ = duk_base64_enctab[t >> 10]; /* XXXXXX-- -------- */
*dst++ = duk_base64_enctab[(t >> 4) & 0x3f]; /* ------XX XXXX---- */
*dst++ = duk_base64_enctab[(t << 2) & 0x3f]; /* -------- ----XXXX */
*dst++ = DUK_ASC_EQUALS;
break;
}
}
}
#else /* DUK_USE_BASE64_FASTPATH */
DUK_LOCAL void duk__base64_encode_helper(const duk_uint8_t *src, duk_size_t srclen, duk_uint8_t *dst) {
duk_small_uint_t i, snip;
duk_uint_t t;
duk_uint_fast8_t x, y;
const duk_uint8_t *src_end;
src_end = src + srclen;
while (src < src_end) {
/* read 3 bytes into 't', padded by zero */
snip = 4;
t = 0;
for (i = 0; i < 3; i++) {
t = t << 8;
if (src >= src_end) {
snip--;
} else {
t += (duk_uint_t) (*src++);
}
}
/*
* Missing bytes snip base64 example
* 0 4 XXXX
* 1 3 XXX=
* 2 2 XX==
*/
DUK_ASSERT(snip >= 2 && snip <= 4);
for (i = 0; i < 4; i++) {
x = (duk_uint_fast8_t) ((t >> 18) & 0x3f);
t = t << 6;
/* A straightforward 64-byte lookup would be faster
* and cleaner, but this is shorter.
*/
if (i >= snip) {
y = '=';
} else if (x <= 25) {
y = x + 'A';
} else if (x <= 51) {
y = x - 26 + 'a';
} else if (x <= 61) {
y = x - 52 + '0';
} else if (x == 62) {
y = '+';
} else {
y = '/';
}
*dst++ = (duk_uint8_t) y;
}
}
}
#endif /* DUK_USE_BASE64_FASTPATH */
#if defined(DUK_USE_BASE64_FASTPATH)
DUK_LOCAL duk_bool_t duk__base64_decode_helper(const duk_uint8_t *src, duk_size_t srclen, duk_uint8_t *dst, duk_uint8_t **out_dst_final) {
duk_int_t x;
duk_int_t t;
duk_small_uint_t n_equal;
duk_small_uint_t n_chars;
const duk_uint8_t *src_end;
const duk_uint8_t *src_end_safe;
src_end = src + srclen;
src_end_safe = src_end - 4; /* if 'src < src_end_safe', safe to read 4 bytes */
/* Innermost fast path processes 4 valid base-64 characters at a time
* but bails out on whitespace, padding chars ('=') and invalid chars.
* Once the slow path segment has been processed, we return to the
* inner fast path again. This handles e.g. base64 with newlines
* reasonably well because the majority of a line is in the fast path.
*/
for (;;) {
/* Fast path, handle units with just actual encoding characters. */
while (src <= src_end_safe) {
/* The lookup byte is intentionally sign extended to (at least)
* 32 bits and then ORed. This ensures that is at least 1 byte
* is negative, the highest bit of 't' will be set at the end
* and we don't need to check every byte.
*/
DUK_DDD(DUK_DDDPRINT("fast loop: src=%p, src_end_safe=%p, src_end=%p",
(const void *) src, (const void *) src_end_safe, (const void *) src_end));
t = (duk_int_t) duk_base64_dectab[*src++];
t = (t << 6) | (duk_int_t) duk_base64_dectab[*src++];
t = (t << 6) | (duk_int_t) duk_base64_dectab[*src++];
t = (t << 6) | (duk_int_t) duk_base64_dectab[*src++];
if (DUK_UNLIKELY(t < 0)) {
DUK_DDD(DUK_DDDPRINT("fast loop unit was not clean, process one slow path unit"));
src -= 4;
break;
}
DUK_ASSERT(t <= 0xffffffL);
DUK_ASSERT((t >> 24) == 0);
*dst++ = (duk_uint8_t) (t >> 16);
*dst++ = (duk_uint8_t) ((t >> 8) & 0xff);
*dst++ = (duk_uint8_t) (t & 0xff);
}
/* Handle one slow path unit (or finish if we're done). */
n_equal = 0;
n_chars = 0;
t = 0;
for (;;) {
DUK_DDD(DUK_DDDPRINT("slow loop: src=%p, src_end=%p, n_chars=%ld, n_equal=%ld, t=%ld",
(const void *) src, (const void *) src_end, (long) n_chars, (long) n_equal, (long) t));
if (DUK_UNLIKELY(src >= src_end)) {
goto done; /* two level break */
}
x = duk_base64_dectab[*src++];
if (DUK_UNLIKELY(x < 0)) {
if (x == -2) {
continue; /* allowed ascii whitespace */
} else if (x == -3) {
n_equal++;
t <<= 6;
} else {
DUK_ASSERT(x == -1);
goto error;
}
} else {
DUK_ASSERT(x >= 0 && x <= 63);
if (n_equal > 0) {
/* Don't allow actual chars after equal sign. */
goto error;
}
t = (t << 6) + x;
}
if (DUK_UNLIKELY(n_chars == 3)) {
/* Emit 3 bytes and backtrack if there was padding. There's
* always space for the whole 3 bytes so no check needed.
*/
DUK_ASSERT(t <= 0xffffffL);
DUK_ASSERT((t >> 24) == 0);
*dst++ = (duk_uint8_t) (t >> 16);
*dst++ = (duk_uint8_t) ((t >> 8) & 0xff);
*dst++ = (duk_uint8_t) (t & 0xff);
if (DUK_UNLIKELY(n_equal > 0)) {
DUK_ASSERT(n_equal <= 4);
/* There may be whitespace between the equal signs. */
if (n_equal == 1) {
/* XXX= */
dst -= 1;
} else if (n_equal == 2) {
/* XX== */
dst -= 2;
} else {
goto error; /* invalid padding */
}
/* Continue parsing after padding, allows concatenated,
* padded base64.
*/
}
break; /* back to fast loop */
} else {
n_chars++;
}
}
}
done:
DUK_DDD(DUK_DDDPRINT("done; src=%p, src_end=%p, n_chars=%ld",
(const void *) src, (const void *) src_end, (long) n_chars));
DUK_ASSERT(src == src_end);
if (n_chars != 0) {
/* Here we'd have the option of decoding unpadded base64
* (e.g. "xxxxyy" instead of "xxxxyy==". Currently not
* accepted.
*/
goto error;
}
*out_dst_final = dst;
return 1;
error:
return 0;
}
#else /* DUK_USE_BASE64_FASTPATH */
DUK_LOCAL duk_bool_t duk__base64_decode_helper(const duk_uint8_t *src, duk_size_t srclen, duk_uint8_t *dst, duk_uint8_t **out_dst_final) {
duk_uint_t t;
duk_uint_fast8_t x, y;
duk_small_uint_t group_idx;
duk_small_uint_t n_equal;
const duk_uint8_t *src_end;
src_end = src + srclen;
t = 0;
group_idx = 0;
n_equal = 0;
while (src < src_end) {
x = *src++;
if (x >= 'A' && x <= 'Z') {
y = x - 'A' + 0;
} else if (x >= 'a' && x <= 'z') {
y = x - 'a' + 26;
} else if (x >= '0' && x <= '9') {
y = x - '0' + 52;
} else if (x == '+') {
y = 62;
} else if (x == '/') {
y = 63;
} else if (x == '=') {
/* We don't check the zero padding bytes here right now
* (that they're actually zero). This seems to be common
* behavior for base-64 decoders.
*/
n_equal++;
t <<= 6; /* shift in zeroes */
goto skip_add;
} else if (x == 0x09 || x == 0x0a || x == 0x0d || x == 0x20) {
/* allow basic ASCII whitespace */
continue;
} else {
goto error;
}
if (n_equal > 0) {
/* Don't allow mixed padding and actual chars. */
goto error;
}
t = (t << 6) + y;
skip_add:
if (group_idx == 3) {
/* output 3 bytes from 't' */
*dst++ = (duk_uint8_t) ((t >> 16) & 0xff);
*dst++ = (duk_uint8_t) ((t >> 8) & 0xff);
*dst++ = (duk_uint8_t) (t & 0xff);
if (DUK_UNLIKELY(n_equal > 0)) {
/* Backtrack. */
DUK_ASSERT(n_equal <= 4);
if (n_equal == 1) {
dst -= 1;
} else if (n_equal == 2) {
dst -= 2;
} else {
goto error; /* invalid padding */
}
/* Here we can choose either to end parsing and ignore
* whatever follows, or to continue parsing in case
* multiple (possibly padded) base64 strings have been
* concatenated. Currently, keep on parsing.
*/
n_equal = 0;
}
t = 0;
group_idx = 0;
} else {
group_idx++;
}
}
if (group_idx != 0) {
/* Here we'd have the option of decoding unpadded base64
* (e.g. "xxxxyy" instead of "xxxxyy==". Currently not
* accepted.
*/
goto error;
}
*out_dst_final = dst;
return 1;
error:
return 0;
}
#endif /* DUK_USE_BASE64_FASTPATH */
DUK_EXTERNAL const char *duk_base64_encode(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
const duk_uint8_t *src;
duk_size_t srclen;
duk_size_t dstlen;
duk_uint8_t *dst;
const char *ret;
DUK_ASSERT_CTX_VALID(ctx);
/* XXX: optimize for string inputs: no need to coerce to a buffer
* which makes a copy of the input.
*/
index = duk_require_normalize_index(ctx, index);
src = duk__prep_codec_arg(ctx, index, &srclen);
/* Note: for srclen=0, src may be NULL */
/* Computation must not wrap; this limit works for 32-bit size_t:
* >>> srclen = 3221225469
* >>> '%x' % ((srclen + 2) / 3 * 4)
* 'fffffffc'
*/
if (srclen > 3221225469UL) {
goto type_error;
}
dstlen = (srclen + 2) / 3 * 4;
dst = (duk_uint8_t *) duk_push_fixed_buffer(ctx, dstlen);
duk__base64_encode_helper((const duk_uint8_t *) src, srclen, dst);
ret = duk_to_string(ctx, -1);
duk_replace(ctx, index);
return ret;
type_error:
DUK_ERROR_TYPE(thr, DUK_STR_ENCODE_FAILED);
return NULL; /* never here */
}
DUK_EXTERNAL void duk_base64_decode(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
const duk_uint8_t *src;
duk_size_t srclen;
duk_size_t dstlen;
duk_uint8_t *dst;
duk_uint8_t *dst_final;
duk_bool_t retval;
DUK_ASSERT_CTX_VALID(ctx);
/* XXX: optimize for buffer inputs: no need to coerce to a string
* which causes an unnecessary interning.
*/
index = duk_require_normalize_index(ctx, index);
src = duk__prep_codec_arg(ctx, index, &srclen);
/* Computation must not wrap, only srclen + 3 is at risk of
* wrapping because after that the number gets smaller.
* This limit works for 32-bit size_t:
* 0x100000000 - 3 - 1 = 4294967292
*/
if (srclen > 4294967292UL) {
goto type_error;
}
dstlen = (srclen + 3) / 4 * 3; /* upper limit, assuming no whitespace etc */
dst = (duk_uint8_t *) duk_push_dynamic_buffer(ctx, dstlen);
/* Note: for dstlen=0, dst may be NULL */
retval = duk__base64_decode_helper((const duk_uint8_t *) src, srclen, dst, &dst_final);
if (!retval) {
goto type_error;
}
/* XXX: convert to fixed buffer? */
(void) duk_resize_buffer(ctx, -1, (duk_size_t) (dst_final - dst));
duk_replace(ctx, index);
return;
type_error:
DUK_ERROR_TYPE(thr, DUK_STR_DECODE_FAILED);
}
DUK_EXTERNAL const char *duk_hex_encode(duk_context *ctx, duk_idx_t index) {
const duk_uint8_t *inp;
duk_size_t len;
duk_size_t i;
duk_uint8_t *buf;
const char *ret;
#if defined(DUK_USE_HEX_FASTPATH)
duk_size_t len_safe;
duk_uint16_t *p16;
#endif
DUK_ASSERT_CTX_VALID(ctx);
index = duk_require_normalize_index(ctx, index);
inp = duk__prep_codec_arg(ctx, index, &len);
DUK_ASSERT(inp != NULL || len == 0);
/* Fixed buffer, no zeroing because we'll fill all the data. */
buf = (duk_uint8_t *) duk_push_buffer_raw(ctx, len * 2, DUK_BUF_FLAG_NOZERO /*flags*/);
DUK_ASSERT(buf != NULL);
#if defined(DUK_USE_HEX_FASTPATH)
DUK_ASSERT((((duk_size_t) buf) & 0x01U) == 0); /* pointer is aligned, guaranteed for fixed buffer */
p16 = (duk_uint16_t *) (void *) buf;
len_safe = len & ~0x03U;
for (i = 0; i < len_safe; i += 4) {
p16[0] = duk_hex_enctab[inp[i]];
p16[1] = duk_hex_enctab[inp[i + 1]];
p16[2] = duk_hex_enctab[inp[i + 2]];
p16[3] = duk_hex_enctab[inp[i + 3]];
p16 += 4;
}
for (; i < len; i++) {
*p16++ = duk_hex_enctab[inp[i]];
}
#else /* DUK_USE_HEX_FASTPATH */
for (i = 0; i < len; i++) {
duk_small_uint_t t;
t = (duk_small_uint_t) inp[i];
buf[i*2 + 0] = duk_lc_digits[t >> 4];
buf[i*2 + 1] = duk_lc_digits[t & 0x0f];
}
#endif /* DUK_USE_HEX_FASTPATH */
/* XXX: Using a string return value forces a string intern which is
* not always necessary. As a rough performance measure, hex encode
* time for tests/perf/test-hex-encode.js dropped from ~35s to ~15s
* without string coercion. Change to returning a buffer and let the
* caller coerce to string if necessary?
*/
ret = duk_to_string(ctx, -1);
duk_replace(ctx, index);
return ret;
}
DUK_EXTERNAL void duk_hex_decode(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
const duk_uint8_t *inp;
duk_size_t len;
duk_size_t i;
duk_int_t t;
duk_uint8_t *buf;
#if defined(DUK_USE_HEX_FASTPATH)
duk_int_t chk;
duk_uint8_t *p;
duk_size_t len_safe;
#endif
DUK_ASSERT_CTX_VALID(ctx);
index = duk_require_normalize_index(ctx, index);
inp = duk__prep_codec_arg(ctx, index, &len);
DUK_ASSERT(inp != NULL || len == 0);
if (len & 0x01) {
goto type_error;
}
/* Fixed buffer, no zeroing because we'll fill all the data. */
buf = (duk_uint8_t *) duk_push_buffer_raw(ctx, len / 2, DUK_BUF_FLAG_NOZERO /*flags*/);
DUK_ASSERT(buf != NULL);
#if defined(DUK_USE_HEX_FASTPATH)
p = buf;
len_safe = len & ~0x07U;
for (i = 0; i < len_safe; i += 8) {
t = ((duk_int_t) duk_hex_dectab_shift4[inp[i]]) |
((duk_int_t) duk_hex_dectab[inp[i + 1]]);
chk = t;
p[0] = (duk_uint8_t) t;
t = ((duk_int_t) duk_hex_dectab_shift4[inp[i + 2]]) |
((duk_int_t) duk_hex_dectab[inp[i + 3]]);
chk |= t;
p[1] = (duk_uint8_t) t;
t = ((duk_int_t) duk_hex_dectab_shift4[inp[i + 4]]) |
((duk_int_t) duk_hex_dectab[inp[i + 5]]);
chk |= t;
p[2] = (duk_uint8_t) t;
t = ((duk_int_t) duk_hex_dectab_shift4[inp[i + 6]]) |
((duk_int_t) duk_hex_dectab[inp[i + 7]]);
chk |= t;
p[3] = (duk_uint8_t) t;
p += 4;
/* Check if any lookup above had a negative result. */
if (DUK_UNLIKELY(chk < 0)) {
goto type_error;
}
}
for (; i < len; i += 2) {
t = (((duk_int_t) duk_hex_dectab[inp[i]]) << 4) |
((duk_int_t) duk_hex_dectab[inp[i + 1]]);
if (DUK_UNLIKELY(t < 0)) {
goto type_error;
}
*p++ = (duk_uint8_t) t;
}
#else /* DUK_USE_HEX_FASTPATH */
for (i = 0; i < len; i += 2) {
/* For invalid characters the value -1 gets extended to
* at least 16 bits. If either nybble is invalid, the
* resulting 't' will be < 0.
*/
t = (((duk_int_t) duk_hex_dectab[inp[i]]) << 4) |
((duk_int_t) duk_hex_dectab[inp[i + 1]]);
if (DUK_UNLIKELY(t < 0)) {
goto type_error;
}
buf[i >> 1] = (duk_uint8_t) t;
}
#endif /* DUK_USE_HEX_FASTPATH */
duk_replace(ctx, index);
return;
type_error:
DUK_ERROR_TYPE(thr, DUK_STR_DECODE_FAILED);
}
DUK_EXTERNAL const char *duk_json_encode(duk_context *ctx, duk_idx_t index) {
#ifdef DUK_USE_ASSERTIONS
duk_idx_t top_at_entry;
#endif
const char *ret;
DUK_ASSERT_CTX_VALID(ctx);
#ifdef DUK_USE_ASSERTIONS
top_at_entry = duk_get_top(ctx);
#endif
index = duk_require_normalize_index(ctx, index);
duk_bi_json_stringify_helper(ctx,
index /*idx_value*/,
DUK_INVALID_INDEX /*idx_replacer*/,
DUK_INVALID_INDEX /*idx_space*/,
0 /*flags*/);
DUK_ASSERT(duk_is_string(ctx, -1));
duk_replace(ctx, index);
ret = duk_get_string(ctx, index);
DUK_ASSERT(duk_get_top(ctx) == top_at_entry);
return ret;
}
DUK_EXTERNAL void duk_json_decode(duk_context *ctx, duk_idx_t index) {
#ifdef DUK_USE_ASSERTIONS
duk_idx_t top_at_entry;
#endif
DUK_ASSERT_CTX_VALID(ctx);
#ifdef DUK_USE_ASSERTIONS
top_at_entry = duk_get_top(ctx);
#endif
index = duk_require_normalize_index(ctx, index);
duk_bi_json_parse_helper(ctx,
index /*idx_value*/,
DUK_INVALID_INDEX /*idx_reviver*/,
0 /*flags*/);
duk_replace(ctx, index);
DUK_ASSERT(duk_get_top(ctx) == top_at_entry);
}
#line 1 "duk_api_compile.c"
/*
* Compilation and evaluation
*/
/* include removed: duk_internal.h */
typedef struct duk__compile_raw_args duk__compile_raw_args;
struct duk__compile_raw_args {
duk_size_t src_length; /* should be first on 64-bit platforms */
const duk_uint8_t *src_buffer;
duk_uint_t flags;
};
/* Eval is just a wrapper now. */
DUK_EXTERNAL duk_int_t duk_eval_raw(duk_context *ctx, const char *src_buffer, duk_size_t src_length, duk_uint_t flags) {
duk_uint_t comp_flags;
duk_int_t rc;
DUK_ASSERT_CTX_VALID(ctx);
/* Note: strictness is *not* inherited from the current Duktape/C.
* This would be confusing because the current strictness state
* depends on whether we're running inside a Duktape/C activation
* (= strict mode) or outside of any activation (= non-strict mode).
* See tests/api/test-eval-strictness.c for more discussion.
*/
/* [ ... source? filename? ] (depends on flags) */
comp_flags = flags;
comp_flags |= DUK_COMPILE_EVAL;
rc = duk_compile_raw(ctx, src_buffer, src_length, comp_flags); /* may be safe, or non-safe depending on flags */
/* [ ... closure/error ] */
if (rc != DUK_EXEC_SUCCESS) {
rc = DUK_EXEC_ERROR;
goto got_rc;
}
duk_push_global_object(ctx); /* explicit 'this' binding, see GH-164 */
if (flags & DUK_COMPILE_SAFE) {
rc = duk_pcall_method(ctx, 0);
} else {
duk_call_method(ctx, 0);
rc = DUK_EXEC_SUCCESS;
}
/* [ ... result/error ] */
got_rc:
if (flags & DUK_COMPILE_NORESULT) {
duk_pop(ctx);
}
return rc;
}
/* Helper which can be called both directly and with duk_safe_call(). */
DUK_LOCAL duk_ret_t duk__do_compile(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk__compile_raw_args *comp_args;
duk_uint_t flags;
duk_small_uint_t comp_flags;
duk_hcompiledfunction *h_templ;
DUK_ASSERT_CTX_VALID(ctx);
/* Note: strictness is not inherited from the current Duktape/C
* context. Otherwise it would not be possible to compile
* non-strict code inside a Duktape/C activation (which is
* always strict now). See tests/api/test-eval-strictness.c
* for discussion.
*/
/* [ ... source? filename? &comp_args ] (depends on flags) */
comp_args = (duk__compile_raw_args *) duk_require_pointer(ctx, -1);
flags = comp_args->flags;
duk_pop(ctx);
/* [ ... source? filename? ] */
if (flags & DUK_COMPILE_NOFILENAME) {
/* Automatic filename: 'eval' or 'input'. */
duk_push_hstring_stridx(ctx, (flags & DUK_COMPILE_EVAL) ? DUK_STRIDX_EVAL : DUK_STRIDX_INPUT);
}
/* [ ... source? filename ] */
if (!comp_args->src_buffer) {
duk_hstring *h_sourcecode;
h_sourcecode = duk_get_hstring(ctx, -2);
if ((flags & DUK_COMPILE_NOSOURCE) || /* args incorrect */
(h_sourcecode == NULL)) { /* e.g. duk_push_string_file_raw() pushed undefined */
/* XXX: when this error is caused by a nonexistent
* file given to duk_peval_file() or similar, the
* error message is not the best possible.
*/
DUK_ERROR_API(thr, DUK_STR_NO_SOURCECODE);
}
DUK_ASSERT(h_sourcecode != NULL);
comp_args->src_buffer = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_sourcecode);
comp_args->src_length = (duk_size_t) DUK_HSTRING_GET_BYTELEN(h_sourcecode);
}
DUK_ASSERT(comp_args->src_buffer != NULL);
/* XXX: unnecessary translation of flags */
comp_flags = 0;
if (flags & DUK_COMPILE_EVAL) {
comp_flags |= DUK_JS_COMPILE_FLAG_EVAL;
}
if (flags & DUK_COMPILE_FUNCTION) {
comp_flags |= DUK_JS_COMPILE_FLAG_EVAL |
DUK_JS_COMPILE_FLAG_FUNCEXPR;
}
if (flags & DUK_COMPILE_STRICT) {
comp_flags |= DUK_JS_COMPILE_FLAG_STRICT;
}
/* [ ... source? filename ] */
duk_js_compile(thr, comp_args->src_buffer, comp_args->src_length, comp_flags);
/* [ ... source? func_template ] */
if (flags & DUK_COMPILE_NOSOURCE) {
;
} else {
duk_remove(ctx, -2);
}
/* [ ... func_template ] */
h_templ = (duk_hcompiledfunction *) duk_get_hobject(ctx, -1);
DUK_ASSERT(h_templ != NULL);
duk_js_push_closure(thr,
h_templ,
thr->builtins[DUK_BIDX_GLOBAL_ENV],
thr->builtins[DUK_BIDX_GLOBAL_ENV],
1 /*add_auto_proto*/);
duk_remove(ctx, -2); /* -> [ ... closure ] */
/* [ ... closure ] */
return 1;
}
DUK_EXTERNAL duk_int_t duk_compile_raw(duk_context *ctx, const char *src_buffer, duk_size_t src_length, duk_uint_t flags) {
duk__compile_raw_args comp_args_alloc;
duk__compile_raw_args *comp_args = &comp_args_alloc;
DUK_ASSERT_CTX_VALID(ctx);
if ((flags & DUK_COMPILE_STRLEN) && (src_buffer != NULL)) {
/* String length is computed here to avoid multiple evaluation
* of a macro argument in the calling side.
*/
src_length = DUK_STRLEN(src_buffer);
}
comp_args->src_buffer = (const duk_uint8_t *) src_buffer;
comp_args->src_length = src_length;
comp_args->flags = flags;
duk_push_pointer(ctx, (void *) comp_args);
/* [ ... source? filename? &comp_args ] (depends on flags) */
if (flags & DUK_COMPILE_SAFE) {
duk_int_t rc;
duk_int_t nargs;
duk_int_t nrets = 1;
/* Arguments can be: [ source? filename? &comp_args] so that
* nargs is 1 to 3. Call site encodes the correct nargs count
* directly into flags.
*/
nargs = flags & 0x07;
DUK_ASSERT(nargs == (1 +
((flags & DUK_COMPILE_NOSOURCE) ? 0 : 1) +
((flags & DUK_COMPILE_NOFILENAME) ? 0 : 1)));
rc = duk_safe_call(ctx, duk__do_compile, nargs, nrets);
/* [ ... closure ] */
return rc;
}
(void) duk__do_compile(ctx);
/* [ ... closure ] */
return DUK_EXEC_SUCCESS;
}
#line 1 "duk_api_debug.c"
/*
* Debugging related API calls
*/
/* include removed: duk_internal.h */
DUK_EXTERNAL void duk_push_context_dump(duk_context *ctx) {
duk_idx_t idx;
duk_idx_t top;
DUK_ASSERT_CTX_VALID(ctx);
/* We don't duk_require_stack() here now, but rely on the caller having
* enough space.
*/
top = duk_get_top(ctx);
duk_push_array(ctx);
for (idx = 0; idx < top; idx++) {
duk_dup(ctx, idx);
duk_put_prop_index(ctx, -2, idx);
}
/* XXX: conversion errors should not propagate outwards.
* Perhaps values need to be coerced individually?
*/
duk_bi_json_stringify_helper(ctx,
duk_get_top_index(ctx), /*idx_value*/
DUK_INVALID_INDEX, /*idx_replacer*/
DUK_INVALID_INDEX, /*idx_space*/
DUK_JSON_FLAG_EXT_CUSTOM |
DUK_JSON_FLAG_ASCII_ONLY |
DUK_JSON_FLAG_AVOID_KEY_QUOTES /*flags*/);
duk_push_sprintf(ctx, "ctx: top=%ld, stack=%s", (long) top, (const char *) duk_safe_to_string(ctx, -1));
duk_replace(ctx, -3); /* [ ... arr jsonx(arr) res ] -> [ ... res jsonx(arr) ] */
duk_pop(ctx);
DUK_ASSERT(duk_is_string(ctx, -1));
}
#if defined(DUK_USE_DEBUGGER_SUPPORT)
DUK_EXTERNAL void duk_debugger_attach_custom(duk_context *ctx,
duk_debug_read_function read_cb,
duk_debug_write_function write_cb,
duk_debug_peek_function peek_cb,
duk_debug_read_flush_function read_flush_cb,
duk_debug_write_flush_function write_flush_cb,
duk_debug_request_function request_cb,
duk_debug_detached_function detached_cb,
void *udata) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_heap *heap;
const char *str;
duk_size_t len;
/* XXX: should there be an error or an automatic detach if
* already attached?
*/
DUK_D(DUK_DPRINT("application called duk_debugger_attach()"));
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(read_cb != NULL);
DUK_ASSERT(write_cb != NULL);
/* Other callbacks are optional. */
heap = thr->heap;
heap->dbg_read_cb = read_cb;
heap->dbg_write_cb = write_cb;
heap->dbg_peek_cb = peek_cb;
heap->dbg_read_flush_cb = read_flush_cb;
heap->dbg_write_flush_cb = write_flush_cb;
heap->dbg_request_cb = request_cb;
heap->dbg_detached_cb = detached_cb;
heap->dbg_udata = udata;
heap->dbg_have_next_byte = 0;
/* Start in paused state. */
heap->dbg_processing = 0;
heap->dbg_paused = 1;
heap->dbg_state_dirty = 1;
heap->dbg_force_restart = 0;
heap->dbg_step_type = 0;
heap->dbg_step_thread = NULL;
heap->dbg_step_csindex = 0;
heap->dbg_step_startline = 0;
heap->dbg_exec_counter = 0;
heap->dbg_last_counter = 0;
heap->dbg_last_time = 0.0;
/* Send version identification and flush right afterwards. Note that
* we must write raw, unframed bytes here.
*/
duk_push_sprintf(ctx, "%ld %ld %s %s\n",
(long) DUK_DEBUG_PROTOCOL_VERSION,
(long) DUK_VERSION,
(const char *) DUK_GIT_DESCRIBE,
(const char *) DUK_USE_TARGET_INFO);
str = duk_get_lstring(ctx, -1, &len);
DUK_ASSERT(str != NULL);
duk_debug_write_bytes(thr, (const duk_uint8_t *) str, len);
duk_debug_write_flush(thr);
duk_pop(ctx);
}
DUK_EXTERNAL void duk_debugger_detach(duk_context *ctx) {
duk_hthread *thr;
DUK_D(DUK_DPRINT("application called duk_debugger_detach()"));
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
/* Can be called multiple times with no harm. */
duk_debug_do_detach(thr->heap);
}
DUK_EXTERNAL void duk_debugger_cooperate(duk_context *ctx) {
duk_hthread *thr;
duk_bool_t processed_messages;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
if (!DUK_HEAP_IS_DEBUGGER_ATTACHED(thr->heap)) {
return;
}
if (thr->callstack_top > 0 || thr->heap->dbg_processing) {
/* Calling duk_debugger_cooperate() while Duktape is being
* called into is not supported. This is not a 100% check
* but prevents any damage in most cases.
*/
return;
}
processed_messages = duk_debug_process_messages(thr, 1 /*no_block*/);
DUK_UNREF(processed_messages);
}
DUK_EXTERNAL duk_bool_t duk_debugger_notify(duk_context *ctx, duk_idx_t nvalues) {
duk_hthread *thr;
duk_idx_t top;
duk_idx_t idx;
duk_bool_t ret = 0;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_D(DUK_DPRINT("application called duk_debugger_notify() with nvalues=%ld", (long) nvalues));
top = duk_get_top(ctx);
if (top < nvalues) {
DUK_ERROR_API(thr, "not enough stack values for notify");
return ret; /* unreachable */
}
if (DUK_HEAP_IS_DEBUGGER_ATTACHED(thr->heap)) {
duk_debug_write_notify(thr, DUK_DBG_CMD_APPNOTIFY);
for (idx = top - nvalues; idx < top; idx++) {
duk_tval *tv = DUK_GET_TVAL_POSIDX(ctx, idx);
duk_debug_write_tval(thr, tv);
}
duk_debug_write_eom(thr);
/* Return non-zero (true) if we have a good reason to believe
* the notify was delivered; if we're still attached at least
* a transport error was not indicated by the transport write
* callback. This is not a 100% guarantee of course.
*/
if (DUK_HEAP_IS_DEBUGGER_ATTACHED(thr->heap)) {
ret = 1;
}
}
duk_pop_n(ctx, nvalues);
return ret;
}
DUK_EXTERNAL void duk_debugger_pause(duk_context *ctx) {
duk_hthread *thr;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_D(DUK_DPRINT("application called duk_debugger_pause()"));
/* Treat like a debugger statement: ignore when not attached. */
if (DUK_HEAP_IS_DEBUGGER_ATTACHED(thr->heap)) {
DUK_HEAP_SET_PAUSED(thr->heap);
/* Pause on the next opcode executed. This is always safe to do even
* inside the debugger message loop: the interrupt counter will be reset
* to its proper value when the message loop exits.
*/
thr->interrupt_init = 1;
thr->interrupt_counter = 0;
}
}
#else /* DUK_USE_DEBUGGER_SUPPORT */
DUK_EXTERNAL void duk_debugger_attach_custom(duk_context *ctx,
duk_debug_read_function read_cb,
duk_debug_write_function write_cb,
duk_debug_peek_function peek_cb,
duk_debug_read_flush_function read_flush_cb,
duk_debug_write_flush_function write_flush_cb,
duk_debug_request_function request_cb,
duk_debug_detached_function detached_cb,
void *udata) {
DUK_ASSERT_CTX_VALID(ctx);
DUK_UNREF(read_cb);
DUK_UNREF(write_cb);
DUK_UNREF(peek_cb);
DUK_UNREF(read_flush_cb);
DUK_UNREF(write_flush_cb);
DUK_UNREF(request_cb);
DUK_UNREF(detached_cb);
DUK_UNREF(udata);
DUK_ERROR_API((duk_hthread *) ctx, "no debugger support");
}
DUK_EXTERNAL void duk_debugger_detach(duk_context *ctx) {
DUK_ASSERT_CTX_VALID(ctx);
DUK_ERROR_API((duk_hthread *) ctx, "no debugger support");
}
DUK_EXTERNAL void duk_debugger_cooperate(duk_context *ctx) {
/* nop */
DUK_ASSERT_CTX_VALID(ctx);
DUK_UNREF(ctx);
}
DUK_EXTERNAL duk_bool_t duk_debugger_notify(duk_context *ctx, duk_idx_t nvalues) {
duk_idx_t top;
DUK_ASSERT_CTX_VALID(ctx);
top = duk_get_top(ctx);
if (top < nvalues) {
DUK_ERROR_API((duk_hthread *) ctx, "not enough stack values for notify");
return 0; /* unreachable */
}
/* No debugger support, just pop values. */
duk_pop_n(ctx, nvalues);
return 0;
}
DUK_EXTERNAL void duk_debugger_pause(duk_context *ctx) {
/* Treat like debugger statement: nop */
DUK_ASSERT_CTX_VALID(ctx);
DUK_UNREF(ctx);
}
#endif /* DUK_USE_DEBUGGER_SUPPORT */
#line 1 "duk_api_heap.c"
/*
* Heap creation and destruction
*/
/* include removed: duk_internal.h */
DUK_EXTERNAL
duk_context *duk_create_heap(duk_alloc_function alloc_func,
duk_realloc_function realloc_func,
duk_free_function free_func,
void *heap_udata,
duk_fatal_function fatal_handler) {
duk_heap *heap = NULL;
duk_context *ctx;
/* Assume that either all memory funcs are NULL or non-NULL, mixed
* cases will now be unsafe.
*/
/* XXX: just assert non-NULL values here and make caller arguments
* do the defaulting to the default implementations (smaller code)?
*/
if (!alloc_func) {
DUK_ASSERT(realloc_func == NULL);
DUK_ASSERT(free_func == NULL);
#if defined(DUK_USE_PROVIDE_DEFAULT_ALLOC_FUNCTIONS)
alloc_func = duk_default_alloc_function;
realloc_func = duk_default_realloc_function;
free_func = duk_default_free_function;
#else
DUK_D(DUK_DPRINT("no allocation functions given and no default providers"));
return NULL;
#endif
} else {
DUK_ASSERT(realloc_func != NULL);
DUK_ASSERT(free_func != NULL);
}
if (!fatal_handler) {
fatal_handler = duk_default_fatal_handler;
}
DUK_ASSERT(alloc_func != NULL);
DUK_ASSERT(realloc_func != NULL);
DUK_ASSERT(free_func != NULL);
DUK_ASSERT(fatal_handler != NULL);
heap = duk_heap_alloc(alloc_func, realloc_func, free_func, heap_udata, fatal_handler);
if (!heap) {
return NULL;
}
ctx = (duk_context *) heap->heap_thread;
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(((duk_hthread *) ctx)->heap != NULL);
return ctx;
}
DUK_EXTERNAL void duk_destroy_heap(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_heap *heap;
if (!ctx) {
return;
}
heap = thr->heap;
DUK_ASSERT(heap != NULL);
duk_heap_free(heap);
}
/* XXX: better place for this */
DUK_EXTERNAL void duk_set_global_object(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h_glob;
duk_hobject *h_prev_glob;
duk_hobject *h_env;
duk_hobject *h_prev_env;
DUK_D(DUK_DPRINT("replace global object with: %!T", duk_get_tval(ctx, -1)));
h_glob = duk_require_hobject(ctx, -1);
DUK_ASSERT(h_glob != NULL);
/*
* Replace global object.
*/
h_prev_glob = thr->builtins[DUK_BIDX_GLOBAL];
DUK_UNREF(h_prev_glob);
thr->builtins[DUK_BIDX_GLOBAL] = h_glob;
DUK_HOBJECT_INCREF(thr, h_glob);
DUK_HOBJECT_DECREF_ALLOWNULL(thr, h_prev_glob); /* side effects, in theory (referenced by global env) */
/*
* Replace lexical environment for global scope
*
* Create a new object environment for the global lexical scope.
* We can't just reset the _Target property of the current one,
* because the lexical scope is shared by other threads with the
* same (initial) built-ins.
*/
(void) duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJENV),
-1); /* no prototype, updated below */
duk_dup(ctx, -2);
duk_dup(ctx, -3);
/* [ ... new_glob new_env new_glob new_glob ] */
duk_xdef_prop_stridx(thr, -3, DUK_STRIDX_INT_TARGET, DUK_PROPDESC_FLAGS_NONE);
duk_xdef_prop_stridx(thr, -2, DUK_STRIDX_INT_THIS, DUK_PROPDESC_FLAGS_NONE);
/* [ ... new_glob new_env ] */
h_env = duk_get_hobject(ctx, -1);
DUK_ASSERT(h_env != NULL);
h_prev_env = thr->builtins[DUK_BIDX_GLOBAL_ENV];
thr->builtins[DUK_BIDX_GLOBAL_ENV] = h_env;
DUK_HOBJECT_INCREF(thr, h_env);
DUK_HOBJECT_DECREF_ALLOWNULL(thr, h_prev_env); /* side effects */
DUK_UNREF(h_env); /* without refcounts */
DUK_UNREF(h_prev_env);
/* [ ... new_glob new_env ] */
duk_pop_2(ctx);
/* [ ... ] */
}
#line 1 "duk_api_logging.c"
/*
* Logging
*
* Current logging primitive is a sprintf-style log which is convenient
* for most C code. Another useful primitive would be to log N arguments
* from value stack (like the Ecmascript binding does).
*/
/* include removed: duk_internal.h */
DUK_EXTERNAL void duk_log_va(duk_context *ctx, duk_int_t level, const char *fmt, va_list ap) {
/* stridx_logfunc[] must be static to allow initializer with old compilers like BCC */
static const duk_uint16_t stridx_logfunc[6] = {
DUK_STRIDX_LC_TRACE, DUK_STRIDX_LC_DEBUG, DUK_STRIDX_LC_INFO,
DUK_STRIDX_LC_WARN, DUK_STRIDX_LC_ERROR, DUK_STRIDX_LC_FATAL
};
DUK_ASSERT_CTX_VALID(ctx);
if (level < 0) {
level = 0;
} else if (level > (int) (sizeof(stridx_logfunc) / sizeof(duk_uint16_t)) - 1) {
level = (int) (sizeof(stridx_logfunc) / sizeof(duk_uint16_t)) - 1;
}
duk_push_hobject_bidx(ctx, DUK_BIDX_LOGGER_CONSTRUCTOR);
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_CLOG);
duk_get_prop_stridx(ctx, -1, stridx_logfunc[level]);
duk_dup(ctx, -2);
/* [ ... Logger clog logfunc clog ] */
duk_push_vsprintf(ctx, fmt, ap);
/* [ ... Logger clog logfunc clog(=this) msg ] */
duk_call_method(ctx, 1 /*nargs*/);
/* [ ... Logger clog res ] */
duk_pop_3(ctx);
}
DUK_EXTERNAL void duk_log(duk_context *ctx, duk_int_t level, const char *fmt, ...) {
va_list ap;
DUK_ASSERT_CTX_VALID(ctx);
va_start(ap, fmt);
duk_log_va(ctx, level, fmt, ap);
va_end(ap);
}
#line 1 "duk_api_memory.c"
/*
* Memory calls.
*/
/* include removed: duk_internal.h */
DUK_EXTERNAL void *duk_alloc_raw(duk_context *ctx, duk_size_t size) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT_CTX_VALID(ctx);
return DUK_ALLOC_RAW(thr->heap, size);
}
DUK_EXTERNAL void duk_free_raw(duk_context *ctx, void *ptr) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT_CTX_VALID(ctx);
DUK_FREE_RAW(thr->heap, ptr);
}
DUK_EXTERNAL void *duk_realloc_raw(duk_context *ctx, void *ptr, duk_size_t size) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT_CTX_VALID(ctx);
return DUK_REALLOC_RAW(thr->heap, ptr, size);
}
DUK_EXTERNAL void *duk_alloc(duk_context *ctx, duk_size_t size) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT_CTX_VALID(ctx);
return DUK_ALLOC(thr->heap, size);
}
DUK_EXTERNAL void duk_free(duk_context *ctx, void *ptr) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT_CTX_VALID(ctx);
DUK_FREE(thr->heap, ptr);
}
DUK_EXTERNAL void *duk_realloc(duk_context *ctx, void *ptr, duk_size_t size) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT_CTX_VALID(ctx);
/*
* Note: since this is an exposed API call, there should be
* no way a mark-and-sweep could have a side effect on the
* memory allocation behind 'ptr'; the pointer should never
* be something that Duktape wants to change.
*
* Thus, no need to use DUK_REALLOC_INDIRECT (and we don't
* have the storage location here anyway).
*/
return DUK_REALLOC(thr->heap, ptr, size);
}
DUK_EXTERNAL void duk_get_memory_functions(duk_context *ctx, duk_memory_functions *out_funcs) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_heap *heap;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(out_funcs != NULL);
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
heap = thr->heap;
out_funcs->alloc_func = heap->alloc_func;
out_funcs->realloc_func = heap->realloc_func;
out_funcs->free_func = heap->free_func;
out_funcs->udata = heap->heap_udata;
}
DUK_EXTERNAL void duk_gc(duk_context *ctx, duk_uint_t flags) {
#ifdef DUK_USE_MARK_AND_SWEEP
duk_hthread *thr = (duk_hthread *) ctx;
duk_heap *heap;
DUK_UNREF(flags);
/* NULL accepted */
if (!ctx) {
return;
}
DUK_ASSERT_CTX_VALID(ctx);
heap = thr->heap;
DUK_ASSERT(heap != NULL);
DUK_D(DUK_DPRINT("mark-and-sweep requested by application"));
duk_heap_mark_and_sweep(heap, 0);
#else
DUK_D(DUK_DPRINT("mark-and-sweep requested by application but mark-and-sweep not enabled, ignoring"));
DUK_UNREF(ctx);
DUK_UNREF(flags);
#endif
}
#line 1 "duk_api_object.c"
/*
* Object handling: property access and other support functions.
*/
/* include removed: duk_internal.h */
/*
* Property handling
*
* The API exposes only the most common property handling functions.
* The caller can invoke Ecmascript built-ins for full control (e.g.
* defineProperty, getOwnPropertyDescriptor).
*/
DUK_EXTERNAL duk_bool_t duk_get_prop(duk_context *ctx, duk_idx_t obj_index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv_obj;
duk_tval *tv_key;
duk_bool_t rc;
DUK_ASSERT_CTX_VALID(ctx);
/* Note: copying tv_obj and tv_key to locals to shield against a valstack
* resize is not necessary for a property get right now.
*/
tv_obj = duk_require_tval(ctx, obj_index);
tv_key = duk_require_tval(ctx, -1);
rc = duk_hobject_getprop(thr, tv_obj, tv_key);
DUK_ASSERT(rc == 0 || rc == 1);
/* a value is left on stack regardless of rc */
duk_remove(ctx, -2); /* remove key */
return rc; /* 1 if property found, 0 otherwise */
}
DUK_EXTERNAL duk_bool_t duk_get_prop_string(duk_context *ctx, duk_idx_t obj_index, const char *key) {
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(key != NULL);
obj_index = duk_require_normalize_index(ctx, obj_index);
duk_push_string(ctx, key);
return duk_get_prop(ctx, obj_index);
}
DUK_EXTERNAL duk_bool_t duk_get_prop_index(duk_context *ctx, duk_idx_t obj_index, duk_uarridx_t arr_index) {
DUK_ASSERT_CTX_VALID(ctx);
obj_index = duk_require_normalize_index(ctx, obj_index);
duk_push_uarridx(ctx, arr_index);
return duk_get_prop(ctx, obj_index);
}
DUK_INTERNAL duk_bool_t duk_get_prop_stridx(duk_context *ctx, duk_idx_t obj_index, duk_small_int_t stridx) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT_DISABLE(stridx >= 0);
DUK_ASSERT(stridx < DUK_HEAP_NUM_STRINGS);
DUK_UNREF(thr);
obj_index = duk_require_normalize_index(ctx, obj_index);
duk_push_hstring(ctx, DUK_HTHREAD_GET_STRING(thr, stridx));
return duk_get_prop(ctx, obj_index);
}
DUK_INTERNAL duk_bool_t duk_get_prop_stridx_boolean(duk_context *ctx, duk_idx_t obj_index, duk_small_int_t stridx, duk_bool_t *out_has_prop) {
duk_bool_t rc;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT_DISABLE(stridx >= 0);
DUK_ASSERT(stridx < DUK_HEAP_NUM_STRINGS);
rc = duk_get_prop_stridx(ctx, obj_index, stridx);
if (out_has_prop) {
*out_has_prop = rc;
}
rc = duk_to_boolean(ctx, -1);
DUK_ASSERT(rc == 0 || rc == 1);
duk_pop(ctx);
return rc;
}
DUK_EXTERNAL duk_bool_t duk_put_prop(duk_context *ctx, duk_idx_t obj_index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv_obj;
duk_tval *tv_key;
duk_tval *tv_val;
duk_small_int_t throw_flag;
duk_bool_t rc;
DUK_ASSERT_CTX_VALID(ctx);
/* Note: copying tv_obj and tv_key to locals to shield against a valstack
* resize is not necessary for a property put right now (putprop protects
* against it internally).
*/
tv_obj = duk_require_tval(ctx, obj_index);
tv_key = duk_require_tval(ctx, -2);
tv_val = duk_require_tval(ctx, -1);
throw_flag = duk_is_strict_call(ctx);
rc = duk_hobject_putprop(thr, tv_obj, tv_key, tv_val, throw_flag);
DUK_ASSERT(rc == 0 || rc == 1);
duk_pop_2(ctx); /* remove key and value */
return rc; /* 1 if property found, 0 otherwise */
}
DUK_EXTERNAL duk_bool_t duk_put_prop_string(duk_context *ctx, duk_idx_t obj_index, const char *key) {
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(key != NULL);
obj_index = duk_require_normalize_index(ctx, obj_index);
duk_push_string(ctx, key);
duk_swap_top(ctx, -2); /* [val key] -> [key val] */
return duk_put_prop(ctx, obj_index);
}
DUK_EXTERNAL duk_bool_t duk_put_prop_index(duk_context *ctx, duk_idx_t obj_index, duk_uarridx_t arr_index) {
DUK_ASSERT_CTX_VALID(ctx);
obj_index = duk_require_normalize_index(ctx, obj_index);
duk_push_uarridx(ctx, arr_index);
duk_swap_top(ctx, -2); /* [val key] -> [key val] */
return duk_put_prop(ctx, obj_index);
}
DUK_INTERNAL duk_bool_t duk_put_prop_stridx(duk_context *ctx, duk_idx_t obj_index, duk_small_int_t stridx) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT_DISABLE(stridx >= 0);
DUK_ASSERT(stridx < DUK_HEAP_NUM_STRINGS);
DUK_UNREF(thr);
obj_index = duk_require_normalize_index(ctx, obj_index);
duk_push_hstring(ctx, DUK_HTHREAD_GET_STRING(thr, stridx));
duk_swap_top(ctx, -2); /* [val key] -> [key val] */
return duk_put_prop(ctx, obj_index);
}
DUK_EXTERNAL duk_bool_t duk_del_prop(duk_context *ctx, duk_idx_t obj_index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv_obj;
duk_tval *tv_key;
duk_small_int_t throw_flag;
duk_bool_t rc;
DUK_ASSERT_CTX_VALID(ctx);
/* Note: copying tv_obj and tv_key to locals to shield against a valstack
* resize is not necessary for a property delete right now.
*/
tv_obj = duk_require_tval(ctx, obj_index);
tv_key = duk_require_tval(ctx, -1);
throw_flag = duk_is_strict_call(ctx);
rc = duk_hobject_delprop(thr, tv_obj, tv_key, throw_flag);
DUK_ASSERT(rc == 0 || rc == 1);
duk_pop(ctx); /* remove key */
return rc;
}
DUK_EXTERNAL duk_bool_t duk_del_prop_string(duk_context *ctx, duk_idx_t obj_index, const char *key) {
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(key != NULL);
obj_index = duk_require_normalize_index(ctx, obj_index);
duk_push_string(ctx, key);
return duk_del_prop(ctx, obj_index);
}
DUK_EXTERNAL duk_bool_t duk_del_prop_index(duk_context *ctx, duk_idx_t obj_index, duk_uarridx_t arr_index) {
DUK_ASSERT_CTX_VALID(ctx);
obj_index = duk_require_normalize_index(ctx, obj_index);
duk_push_uarridx(ctx, arr_index);
return duk_del_prop(ctx, obj_index);
}
DUK_INTERNAL duk_bool_t duk_del_prop_stridx(duk_context *ctx, duk_idx_t obj_index, duk_small_int_t stridx) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT_DISABLE(stridx >= 0);
DUK_ASSERT(stridx < DUK_HEAP_NUM_STRINGS);
DUK_UNREF(thr);
obj_index = duk_require_normalize_index(ctx, obj_index);
duk_push_hstring(ctx, DUK_HTHREAD_GET_STRING(thr, stridx));
return duk_del_prop(ctx, obj_index);
}
DUK_EXTERNAL duk_bool_t duk_has_prop(duk_context *ctx, duk_idx_t obj_index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv_obj;
duk_tval *tv_key;
duk_bool_t rc;
DUK_ASSERT_CTX_VALID(ctx);
/* Note: copying tv_obj and tv_key to locals to shield against a valstack
* resize is not necessary for a property existence check right now.
*/
tv_obj = duk_require_tval(ctx, obj_index);
tv_key = duk_require_tval(ctx, -1);
rc = duk_hobject_hasprop(thr, tv_obj, tv_key);
DUK_ASSERT(rc == 0 || rc == 1);
duk_pop(ctx); /* remove key */
return rc; /* 1 if property found, 0 otherwise */
}
DUK_EXTERNAL duk_bool_t duk_has_prop_string(duk_context *ctx, duk_idx_t obj_index, const char *key) {
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(key != NULL);
obj_index = duk_require_normalize_index(ctx, obj_index);
duk_push_string(ctx, key);
return duk_has_prop(ctx, obj_index);
}
DUK_EXTERNAL duk_bool_t duk_has_prop_index(duk_context *ctx, duk_idx_t obj_index, duk_uarridx_t arr_index) {
DUK_ASSERT_CTX_VALID(ctx);
obj_index = duk_require_normalize_index(ctx, obj_index);
duk_push_uarridx(ctx, arr_index);
return duk_has_prop(ctx, obj_index);
}
DUK_INTERNAL duk_bool_t duk_has_prop_stridx(duk_context *ctx, duk_idx_t obj_index, duk_small_int_t stridx) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT_DISABLE(stridx >= 0);
DUK_ASSERT(stridx < DUK_HEAP_NUM_STRINGS);
DUK_UNREF(thr);
obj_index = duk_require_normalize_index(ctx, obj_index);
duk_push_hstring(ctx, DUK_HTHREAD_GET_STRING(thr, stridx));
return duk_has_prop(ctx, obj_index);
}
/* Define own property without inheritance looks and such. This differs from
* [[DefineOwnProperty]] because special behaviors (like Array 'length') are
* not invoked by this method. The caller must be careful to invoke any such
* behaviors if necessary.
*/
DUK_INTERNAL void duk_xdef_prop(duk_context *ctx, duk_idx_t obj_index, duk_small_uint_t desc_flags) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *obj;
duk_hstring *key;
DUK_ASSERT_CTX_VALID(ctx);
obj = duk_require_hobject(ctx, obj_index);
DUK_ASSERT(obj != NULL);
key = duk_to_hstring(ctx, -2);
DUK_ASSERT(key != NULL);
DUK_ASSERT(duk_require_tval(ctx, -1) != NULL);
duk_hobject_define_property_internal(thr, obj, key, desc_flags);
duk_pop(ctx); /* pop key */
}
DUK_INTERNAL void duk_xdef_prop_index(duk_context *ctx, duk_idx_t obj_index, duk_uarridx_t arr_index, duk_small_uint_t desc_flags) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *obj;
DUK_ASSERT_CTX_VALID(ctx);
obj = duk_require_hobject(ctx, obj_index);
DUK_ASSERT(obj != NULL);
duk_hobject_define_property_internal_arridx(thr, obj, arr_index, desc_flags);
/* value popped by call */
}
DUK_INTERNAL void duk_xdef_prop_stridx(duk_context *ctx, duk_idx_t obj_index, duk_small_int_t stridx, duk_small_uint_t desc_flags) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *obj;
duk_hstring *key;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT_DISABLE(stridx >= 0);
DUK_ASSERT(stridx < DUK_HEAP_NUM_STRINGS);
obj = duk_require_hobject(ctx, obj_index);
DUK_ASSERT(obj != NULL);
key = DUK_HTHREAD_GET_STRING(thr, stridx);
DUK_ASSERT(key != NULL);
DUK_ASSERT(duk_require_tval(ctx, -1) != NULL);
duk_hobject_define_property_internal(thr, obj, key, desc_flags);
/* value popped by call */
}
DUK_INTERNAL void duk_xdef_prop_stridx_builtin(duk_context *ctx, duk_idx_t obj_index, duk_small_int_t stridx, duk_small_int_t builtin_idx, duk_small_uint_t desc_flags) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *obj;
duk_hstring *key;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT_DISABLE(stridx >= 0);
DUK_ASSERT(stridx < DUK_HEAP_NUM_STRINGS);
DUK_ASSERT_DISABLE(builtin_idx >= 0);
DUK_ASSERT(builtin_idx < DUK_NUM_BUILTINS);
obj = duk_require_hobject(ctx, obj_index);
DUK_ASSERT(obj != NULL);
key = DUK_HTHREAD_GET_STRING(thr, stridx);
DUK_ASSERT(key != NULL);
duk_push_hobject(ctx, thr->builtins[builtin_idx]);
duk_hobject_define_property_internal(thr, obj, key, desc_flags);
/* value popped by call */
}
/* This is a rare property helper; it sets the global thrower (E5 Section 13.2.3)
* setter/getter into an object property. This is needed by the 'arguments'
* object creation code, function instance creation code, and Function.prototype.bind().
*/
DUK_INTERNAL void duk_xdef_prop_stridx_thrower(duk_context *ctx, duk_idx_t obj_index, duk_small_int_t stridx, duk_small_uint_t desc_flags) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *obj = duk_require_hobject(ctx, obj_index);
duk_hobject *thrower = thr->builtins[DUK_BIDX_TYPE_ERROR_THROWER];
duk_hobject_define_accessor_internal(thr, obj, DUK_HTHREAD_GET_STRING(thr, stridx), thrower, thrower, desc_flags);
}
/* Object.defineProperty() equivalent C binding. */
DUK_EXTERNAL void duk_def_prop(duk_context *ctx, duk_idx_t obj_index, duk_uint_t flags) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_idx_t idx_base;
duk_hobject *obj;
duk_hstring *key;
duk_idx_t idx_value;
duk_hobject *get;
duk_hobject *set;
duk_uint_t is_data_desc;
duk_uint_t is_acc_desc;
DUK_ASSERT_CTX_VALID(ctx);
obj = duk_require_hobject(ctx, obj_index);
is_data_desc = flags & (DUK_DEFPROP_HAVE_VALUE | DUK_DEFPROP_HAVE_WRITABLE);
is_acc_desc = flags & (DUK_DEFPROP_HAVE_GETTER | DUK_DEFPROP_HAVE_SETTER);
if (is_data_desc && is_acc_desc) {
/* "Have" flags must not be conflicting so that they would
* apply to both a plain property and an accessor at the same
* time.
*/
goto fail_invalid_desc;
}
idx_base = duk_get_top_index(ctx);
if (flags & DUK_DEFPROP_HAVE_SETTER) {
duk_require_type_mask(ctx, idx_base, DUK_TYPE_MASK_UNDEFINED |
DUK_TYPE_MASK_OBJECT |
DUK_TYPE_MASK_LIGHTFUNC);
set = duk_get_hobject_or_lfunc_coerce(ctx, idx_base);
if (set != NULL && !DUK_HOBJECT_IS_CALLABLE(set)) {
goto fail_not_callable;
}
idx_base--;
} else {
set = NULL;
}
if (flags & DUK_DEFPROP_HAVE_GETTER) {
duk_require_type_mask(ctx, idx_base, DUK_TYPE_MASK_UNDEFINED |
DUK_TYPE_MASK_OBJECT |
DUK_TYPE_MASK_LIGHTFUNC);
get = duk_get_hobject_or_lfunc_coerce(ctx, idx_base);
if (get != NULL && !DUK_HOBJECT_IS_CALLABLE(get)) {
goto fail_not_callable;
}
idx_base--;
} else {
get = NULL;
}
if (flags & DUK_DEFPROP_HAVE_VALUE) {
idx_value = idx_base;
idx_base--;
} else {
idx_value = (duk_idx_t) -1;
}
key = duk_require_hstring(ctx, idx_base);
duk_require_valid_index(ctx, idx_base);
duk_hobject_define_property_helper(ctx,
flags /*defprop_flags*/,
obj,
key,
idx_value,
get,
set);
/* Clean up stack */
duk_set_top(ctx, idx_base);
/* [ ... obj ... ] */
return;
fail_invalid_desc:
DUK_ERROR_TYPE(thr, DUK_STR_INVALID_DESCRIPTOR);
return;
fail_not_callable:
DUK_ERROR_TYPE(thr, DUK_STR_NOT_CALLABLE);
return;
}
/*
* Object related
*
* Note: seal() and freeze() are accessible through Ecmascript bindings,
* and are not exposed through the API.
*/
DUK_EXTERNAL void duk_compact(duk_context *ctx, duk_idx_t obj_index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *obj;
DUK_ASSERT_CTX_VALID(ctx);
obj = duk_get_hobject(ctx, obj_index);
if (obj) {
/* Note: this may fail, caller should protect the call if necessary */
duk_hobject_compact_props(thr, obj);
}
}
/* XXX: the duk_hobject_enum.c stack APIs should be reworked */
DUK_EXTERNAL void duk_enum(duk_context *ctx, duk_idx_t obj_index, duk_uint_t enum_flags) {
DUK_ASSERT_CTX_VALID(ctx);
duk_dup(ctx, obj_index);
duk_require_hobject_or_lfunc_coerce(ctx, -1);
duk_hobject_enumerator_create(ctx, enum_flags); /* [target] -> [enum] */
}
DUK_EXTERNAL duk_bool_t duk_next(duk_context *ctx, duk_idx_t enum_index, duk_bool_t get_value) {
DUK_ASSERT_CTX_VALID(ctx);
duk_require_hobject(ctx, enum_index);
duk_dup(ctx, enum_index);
return duk_hobject_enumerator_next(ctx, get_value);
}
/*
* Helpers for writing multiple properties
*/
DUK_EXTERNAL void duk_put_function_list(duk_context *ctx, duk_idx_t obj_index, const duk_function_list_entry *funcs) {
const duk_function_list_entry *ent = funcs;
DUK_ASSERT_CTX_VALID(ctx);
obj_index = duk_require_normalize_index(ctx, obj_index);
if (ent != NULL) {
while (ent->key != NULL) {
duk_push_c_function(ctx, ent->value, ent->nargs);
duk_put_prop_string(ctx, obj_index, ent->key);
ent++;
}
}
}
DUK_EXTERNAL void duk_put_number_list(duk_context *ctx, duk_idx_t obj_index, const duk_number_list_entry *numbers) {
const duk_number_list_entry *ent = numbers;
DUK_ASSERT_CTX_VALID(ctx);
obj_index = duk_require_normalize_index(ctx, obj_index);
if (ent != NULL) {
while (ent->key != NULL) {
duk_push_number(ctx, ent->value);
duk_put_prop_string(ctx, obj_index, ent->key);
ent++;
}
}
}
/*
* Shortcut for accessing global object properties
*/
DUK_EXTERNAL duk_bool_t duk_get_global_string(duk_context *ctx, const char *key) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_bool_t ret;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL] != NULL);
/* XXX: direct implementation */
duk_push_hobject(ctx, thr->builtins[DUK_BIDX_GLOBAL]);
ret = duk_get_prop_string(ctx, -1, key);
duk_remove(ctx, -2);
return ret;
}
DUK_EXTERNAL duk_bool_t duk_put_global_string(duk_context *ctx, const char *key) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_bool_t ret;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL] != NULL);
/* XXX: direct implementation */
duk_push_hobject(ctx, thr->builtins[DUK_BIDX_GLOBAL]);
duk_insert(ctx, -2);
ret = duk_put_prop_string(ctx, -2, key); /* [ ... global val ] -> [ ... global ] */
duk_pop(ctx);
return ret;
}
/*
* Object prototype
*/
DUK_EXTERNAL void duk_get_prototype(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *obj;
duk_hobject *proto;
DUK_ASSERT_CTX_VALID(ctx);
DUK_UNREF(thr);
obj = duk_require_hobject(ctx, index);
DUK_ASSERT(obj != NULL);
/* XXX: shared helper for duk_push_hobject_or_undefined()? */
proto = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, obj);
if (proto) {
duk_push_hobject(ctx, proto);
} else {
duk_push_undefined(ctx);
}
}
DUK_EXTERNAL void duk_set_prototype(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *obj;
duk_hobject *proto;
DUK_ASSERT_CTX_VALID(ctx);
obj = duk_require_hobject(ctx, index);
DUK_ASSERT(obj != NULL);
duk_require_type_mask(ctx, -1, DUK_TYPE_MASK_UNDEFINED |
DUK_TYPE_MASK_OBJECT);
proto = duk_get_hobject(ctx, -1);
/* proto can also be NULL here (allowed explicitly) */
#if defined(DUK_USE_ROM_OBJECTS)
if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)) {
DUK_ERROR_TYPE(thr, DUK_STR_NOT_CONFIGURABLE); /* XXX: "read only object"? */
return;
}
#endif
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, obj, proto);
duk_pop(ctx);
}
/*
* Object finalizer
*/
/* XXX: these could be implemented as macros calling an internal function
* directly.
* XXX: same issue as with Duktape.fin: there's no way to delete the property
* now (just set it to undefined).
*/
DUK_EXTERNAL void duk_get_finalizer(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
duk_get_prop_stridx(ctx, index, DUK_STRIDX_INT_FINALIZER);
}
DUK_EXTERNAL void duk_set_finalizer(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
duk_put_prop_stridx(ctx, index, DUK_STRIDX_INT_FINALIZER);
}
#line 1 "duk_api_stack.c"
/*
* API calls related to general value stack manipulation: resizing the value
* stack, pushing and popping values, type checking and reading values,
* coercing values, etc.
*
* Also contains internal functions (such as duk_get_tval()), defined
* in duk_api_internal.h, with semantics similar to the public API.
*/
/* XXX: repetition of stack pre-checks -> helper or macro or inline */
/* XXX: shared api error strings, and perhaps even throw code for rare cases? */
/* include removed: duk_internal.h */
/*
* Forward declarations
*/
DUK_LOCAL_DECL duk_idx_t duk__push_c_function_raw(duk_context *ctx, duk_c_function func, duk_idx_t nargs, duk_uint_t flags);
/*
* Global state for working around missing variadic macros
*/
#ifndef DUK_USE_VARIADIC_MACROS
DUK_EXTERNAL const char *duk_api_global_filename = NULL;
DUK_EXTERNAL duk_int_t duk_api_global_line = 0;
#endif
/*
* Misc helpers
*/
/* Check that there's room to push one value. */
#if defined(DUK_USE_VALSTACK_UNSAFE)
/* Faster but value stack overruns are memory unsafe. */
#define DUK__CHECK_SPACE() do { \
DUK_ASSERT(!(thr->valstack_top >= thr->valstack_end)); \
} while (0)
#else
#define DUK__CHECK_SPACE() do { \
if (DUK_UNLIKELY(thr->valstack_top >= thr->valstack_end)) { \
DUK_ERROR_API(thr, DUK_STR_PUSH_BEYOND_ALLOC_STACK); \
} \
} while (0)
#endif
DUK_LOCAL_DECL duk_heaphdr *duk__get_tagged_heaphdr_raw(duk_context *ctx, duk_idx_t index, duk_uint_t tag);
DUK_LOCAL duk_int_t duk__api_coerce_d2i(duk_context *ctx, duk_idx_t index, duk_bool_t require) {
duk_hthread *thr;
duk_tval *tv;
duk_small_int_t c;
duk_double_t d;
thr = (duk_hthread *) ctx;
tv = duk_get_tval(ctx, index);
if (tv == NULL) {
goto error_notnumber;
}
/*
* Special cases like NaN and +/- Infinity are handled explicitly
* because a plain C coercion from double to int handles these cases
* in undesirable ways. For instance, NaN may coerce to INT_MIN
* (not zero), and INT_MAX + 1 may coerce to INT_MIN (not INT_MAX).
*
* This double-to-int coercion differs from ToInteger() because it
* has a finite range (ToInteger() allows e.g. +/- Infinity). It
* also differs from ToInt32() because the INT_MIN/INT_MAX clamping
* depends on the size of the int type on the platform. In particular,
* on platforms with a 64-bit int type, the full range is allowed.
*/
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv)) {
duk_int64_t t = DUK_TVAL_GET_FASTINT(tv);
#if (DUK_INT_MAX <= 0x7fffffffL)
/* Clamping only necessary for 32-bit ints. */
if (t < DUK_INT_MIN) {
t = DUK_INT_MIN;
} else if (t > DUK_INT_MAX) {
t = DUK_INT_MAX;
}
#endif
return (duk_int_t) t;
}
#endif
if (DUK_TVAL_IS_NUMBER(tv)) {
d = DUK_TVAL_GET_NUMBER(tv);
c = (duk_small_int_t) DUK_FPCLASSIFY(d);
if (c == DUK_FP_NAN) {
return 0;
} else if (d < (duk_double_t) DUK_INT_MIN) {
/* covers -Infinity */
return DUK_INT_MIN;
} else if (d > (duk_double_t) DUK_INT_MAX) {
/* covers +Infinity */
return DUK_INT_MAX;
} else {
/* coerce towards zero */
return (duk_int_t) d;
}
}
error_notnumber:
if (require) {
DUK_ERROR_REQUIRE_TYPE_INDEX(thr, index, "number", DUK_STR_NOT_NUMBER);
/* not reachable */
}
return 0;
}
DUK_LOCAL duk_uint_t duk__api_coerce_d2ui(duk_context *ctx, duk_idx_t index, duk_bool_t require) {
duk_hthread *thr;
duk_tval *tv;
duk_small_int_t c;
duk_double_t d;
/* Same as above but for unsigned int range. */
thr = (duk_hthread *) ctx;
tv = duk_get_tval(ctx, index);
if (tv == NULL) {
goto error_notnumber;
}
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv)) {
duk_int64_t t = DUK_TVAL_GET_FASTINT(tv);
if (t < 0) {
t = 0;
}
#if (DUK_UINT_MAX <= 0xffffffffUL)
/* Clamping only necessary for 32-bit ints. */
else if (t > DUK_UINT_MAX) {
t = DUK_UINT_MAX;
}
#endif
return (duk_uint_t) t;
}
#endif
if (DUK_TVAL_IS_NUMBER(tv)) {
d = DUK_TVAL_GET_NUMBER(tv);
c = (duk_small_int_t) DUK_FPCLASSIFY(d);
if (c == DUK_FP_NAN) {
return 0;
} else if (d < 0.0) {
/* covers -Infinity */
return (duk_uint_t) 0;
} else if (d > (duk_double_t) DUK_UINT_MAX) {
/* covers +Infinity */
return (duk_uint_t) DUK_UINT_MAX;
} else {
/* coerce towards zero */
return (duk_uint_t) d;
}
}
error_notnumber:
if (require) {
DUK_ERROR_REQUIRE_TYPE_INDEX(thr, index, "number", DUK_STR_NOT_NUMBER);
/* not reachable */
}
return 0;
}
/*
* Stack index validation/normalization and getting a stack duk_tval ptr.
*
* These are called by many API entrypoints so the implementations must be
* fast and "inlined".
*
* There's some repetition because of this; keep the functions in sync.
*/
DUK_EXTERNAL duk_idx_t duk_normalize_index(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_uidx_t vs_size;
duk_uidx_t uindex;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(DUK_INVALID_INDEX < 0);
/* Care must be taken to avoid pointer wrapping in the index
* validation. For instance, on a 32-bit platform with 8-byte
* duk_tval the index 0x20000000UL would wrap the memory space
* once.
*/
/* Assume value stack sizes (in elements) fits into duk_idx_t. */
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
vs_size = (duk_uidx_t) (thr->valstack_top - thr->valstack_bottom);
DUK_ASSERT_DISABLE(vs_size >= 0); /* unsigned */
if (index < 0) {
uindex = vs_size + (duk_uidx_t) index;
} else {
/* since index non-negative */
DUK_ASSERT(index != DUK_INVALID_INDEX);
uindex = (duk_uidx_t) index;
}
/* DUK_INVALID_INDEX won't be accepted as a valid index. */
DUK_ASSERT(vs_size + (duk_uidx_t) DUK_INVALID_INDEX >= vs_size);
if (DUK_LIKELY(uindex < vs_size)) {
return (duk_idx_t) uindex;
}
return DUK_INVALID_INDEX;
}
DUK_EXTERNAL duk_idx_t duk_require_normalize_index(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_uidx_t vs_size;
duk_uidx_t uindex;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(DUK_INVALID_INDEX < 0);
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
vs_size = (duk_uidx_t) (thr->valstack_top - thr->valstack_bottom);
DUK_ASSERT_DISABLE(vs_size >= 0); /* unsigned */
if (index < 0) {
uindex = vs_size + (duk_uidx_t) index;
} else {
DUK_ASSERT(index != DUK_INVALID_INDEX);
uindex = (duk_uidx_t) index;
}
/* DUK_INVALID_INDEX won't be accepted as a valid index. */
DUK_ASSERT(vs_size + (duk_uidx_t) DUK_INVALID_INDEX >= vs_size);
if (DUK_LIKELY(uindex < vs_size)) {
return (duk_idx_t) uindex;
}
DUK_ERROR_API_INDEX(thr, index);
return 0; /* unreachable */
}
DUK_INTERNAL duk_tval *duk_get_tval(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_uidx_t vs_size;
duk_uidx_t uindex;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(DUK_INVALID_INDEX < 0);
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
vs_size = (duk_uidx_t) (thr->valstack_top - thr->valstack_bottom);
DUK_ASSERT_DISABLE(vs_size >= 0); /* unsigned */
if (index < 0) {
uindex = vs_size + (duk_uidx_t) index;
} else {
DUK_ASSERT(index != DUK_INVALID_INDEX);
uindex = (duk_uidx_t) index;
}
/* DUK_INVALID_INDEX won't be accepted as a valid index. */
DUK_ASSERT(vs_size + (duk_uidx_t) DUK_INVALID_INDEX >= vs_size);
if (DUK_LIKELY(uindex < vs_size)) {
return thr->valstack_bottom + uindex;
}
return NULL;
}
DUK_INTERNAL duk_tval *duk_require_tval(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_uidx_t vs_size;
duk_uidx_t uindex;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(DUK_INVALID_INDEX < 0);
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
vs_size = (duk_uidx_t) (thr->valstack_top - thr->valstack_bottom);
DUK_ASSERT_DISABLE(vs_size >= 0); /* unsigned */
/* Use unsigned arithmetic to optimize comparison. */
if (index < 0) {
uindex = vs_size + (duk_uidx_t) index;
} else {
DUK_ASSERT(index != DUK_INVALID_INDEX);
uindex = (duk_uidx_t) index;
}
/* DUK_INVALID_INDEX won't be accepted as a valid index. */
DUK_ASSERT(vs_size + (duk_uidx_t) DUK_INVALID_INDEX >= vs_size);
if (DUK_LIKELY(uindex < vs_size)) {
return thr->valstack_bottom + uindex;
}
DUK_ERROR_API_INDEX(thr, index);
return NULL;
}
/* Non-critical. */
DUK_EXTERNAL duk_bool_t duk_is_valid_index(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(DUK_INVALID_INDEX < 0);
return (duk_normalize_index(ctx, index) >= 0);
}
/* Non-critical. */
DUK_EXTERNAL void duk_require_valid_index(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(DUK_INVALID_INDEX < 0);
if (duk_normalize_index(ctx, index) < 0) {
DUK_ERROR_API_INDEX(thr, index);
return; /* unreachable */
}
}
/*
* Value stack top handling
*/
DUK_EXTERNAL duk_idx_t duk_get_top(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT_CTX_VALID(ctx);
return (duk_idx_t) (thr->valstack_top - thr->valstack_bottom);
}
/* Set stack top within currently allocated range, but don't reallocate.
* This is performance critical especially for call handling, so whenever
* changing, profile and look at generated code.
*/
DUK_EXTERNAL void duk_set_top(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_uidx_t vs_size;
duk_uidx_t vs_limit;
duk_uidx_t uindex;
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(DUK_INVALID_INDEX < 0);
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
DUK_ASSERT(thr->valstack_end >= thr->valstack_bottom);
vs_size = (duk_uidx_t) (thr->valstack_top - thr->valstack_bottom);
vs_limit = (duk_uidx_t) (thr->valstack_end - thr->valstack_bottom);
if (index < 0) {
/* Negative indices are always within allocated stack but
* must not go below zero index.
*/
uindex = vs_size + (duk_uidx_t) index;
} else {
/* Positive index can be higher than valstack top but must
* not go above allocated stack (equality is OK).
*/
uindex = (duk_uidx_t) index;
}
/* DUK_INVALID_INDEX won't be accepted as a valid index. */
DUK_ASSERT(vs_size + (duk_uidx_t) DUK_INVALID_INDEX >= vs_size);
DUK_ASSERT(vs_size + (duk_uidx_t) DUK_INVALID_INDEX >= vs_limit);
#if defined(DUK_USE_VALSTACK_UNSAFE)
DUK_ASSERT(uindex <= vs_limit);
DUK_UNREF(vs_limit);
#else
if (DUK_UNLIKELY(uindex > vs_limit)) {
DUK_ERROR_API_INDEX(thr, index);
return; /* unreachable */
}
#endif
DUK_ASSERT(uindex <= vs_limit);
/* Handle change in value stack top. Respect value stack
* initialization policy: 'undefined' above top. Note that
* DECREF may cause a side effect that reallocates valstack,
* so must relookup after DECREF.
*/
if (uindex >= vs_size) {
/* Stack size increases or stays the same. */
#if defined(DUK_USE_ASSERTIONS)
duk_uidx_t count;
count = uindex - vs_size;
while (count != 0) {
count--;
tv = thr->valstack_top + count;
DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(tv));
}
#endif
thr->valstack_top = thr->valstack_bottom + uindex;
} else {
/* Stack size decreases. */
#if defined(DUK_USE_REFERENCE_COUNTING)
duk_uidx_t count;
count = vs_size - uindex;
DUK_ASSERT(count > 0);
while (count > 0) {
count--;
tv = --thr->valstack_top; /* tv -> value just before prev top value; must relookup */
DUK_ASSERT(tv >= thr->valstack_bottom);
DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv); /* side effects */
}
#else /* DUK_USE_REFERENCE_COUNTING */
duk_uidx_t count;
duk_tval *tv_end;
count = vs_size - uindex;
tv = thr->valstack_top;
tv_end = tv - count;
DUK_ASSERT(tv > tv_end);
do {
tv--;
DUK_TVAL_SET_UNDEFINED(tv);
} while (tv != tv_end);
thr->valstack_top = tv_end;
#endif /* DUK_USE_REFERENCE_COUNTING */
}
}
DUK_EXTERNAL duk_idx_t duk_get_top_index(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_idx_t ret;
DUK_ASSERT_CTX_VALID(ctx);
ret = ((duk_idx_t) (thr->valstack_top - thr->valstack_bottom)) - 1;
if (DUK_UNLIKELY(ret < 0)) {
/* Return invalid index; if caller uses this without checking
* in another API call, the index won't map to a valid stack
* entry.
*/
return DUK_INVALID_INDEX;
}
return ret;
}
DUK_EXTERNAL duk_idx_t duk_require_top_index(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_idx_t ret;
DUK_ASSERT_CTX_VALID(ctx);
ret = ((duk_idx_t) (thr->valstack_top - thr->valstack_bottom)) - 1;
if (DUK_UNLIKELY(ret < 0)) {
DUK_ERROR_API_INDEX(thr, -1);
return 0; /* unreachable */
}
return ret;
}
/*
* Value stack resizing.
*
* This resizing happens above the current "top": the value stack can be
* grown or shrunk, but the "top" is not affected. The value stack cannot
* be resized to a size below the current "top".
*
* The low level reallocation primitive must carefully recompute all value
* stack pointers, and must also work if ALL pointers are NULL. The resize
* is quite tricky because the valstack realloc may cause a mark-and-sweep,
* which may run finalizers. Running finalizers may resize the valstack
* recursively (the same value stack we're working on). So, after realloc
* returns, we know that the valstack "top" should still be the same (there
* should not be live values above the "top"), but its underlying size and
* pointer may have changed.
*/
/* XXX: perhaps refactor this to allow caller to specify some parameters, or
* at least a 'compact' flag which skips any spare or round-up .. useful for
* emergency gc.
*/
DUK_LOCAL duk_bool_t duk__resize_valstack(duk_context *ctx, duk_size_t new_size) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_ptrdiff_t old_bottom_offset;
duk_ptrdiff_t old_top_offset;
duk_ptrdiff_t old_end_offset_post;
#ifdef DUK_USE_DEBUG
duk_ptrdiff_t old_end_offset_pre;
duk_tval *old_valstack_pre;
duk_tval *old_valstack_post;
#endif
duk_tval *new_valstack;
duk_size_t new_alloc_size;
duk_tval *p;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->valstack_bottom >= thr->valstack);
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
DUK_ASSERT(thr->valstack_end >= thr->valstack_top);
DUK_ASSERT((duk_size_t) (thr->valstack_top - thr->valstack) <= new_size); /* can't resize below 'top' */
DUK_ASSERT(new_size <= thr->valstack_max); /* valstack limit caller has check, prevents wrapping */
DUK_ASSERT(new_size <= DUK_SIZE_MAX / sizeof(duk_tval)); /* specific assert for wrapping */
/* get pointer offsets for tweaking below */
old_bottom_offset = (((duk_uint8_t *) thr->valstack_bottom) - ((duk_uint8_t *) thr->valstack));
old_top_offset = (((duk_uint8_t *) thr->valstack_top) - ((duk_uint8_t *) thr->valstack));
#ifdef DUK_USE_DEBUG
old_end_offset_pre = (((duk_uint8_t *) thr->valstack_end) - ((duk_uint8_t *) thr->valstack)); /* not very useful, used for debugging */
old_valstack_pre = thr->valstack;
#endif
/* Allocate a new valstack.
*
* Note: cannot use a plain DUK_REALLOC() because a mark-and-sweep may
* invalidate the original thr->valstack base pointer inside the realloc
* process. See doc/memory-management.rst.
*/
new_alloc_size = sizeof(duk_tval) * new_size;
new_valstack = (duk_tval *) DUK_REALLOC_INDIRECT(thr->heap, duk_hthread_get_valstack_ptr, (void *) thr, new_alloc_size);
if (!new_valstack) {
/* Because new_size != 0, if condition doesn't need to be
* (new_valstack != NULL || new_size == 0).
*/
DUK_ASSERT(new_size != 0);
DUK_D(DUK_DPRINT("failed to resize valstack to %lu entries (%lu bytes)",
(unsigned long) new_size, (unsigned long) new_alloc_size));
return 0;
}
/* Note: the realloc may have triggered a mark-and-sweep which may
* have resized our valstack internally. However, the mark-and-sweep
* MUST NOT leave the stack bottom/top in a different state. Particular
* assumptions and facts:
*
* - The thr->valstack pointer may be different after realloc,
* and the offset between thr->valstack_end <-> thr->valstack
* may have changed.
* - The offset between thr->valstack_bottom <-> thr->valstack
* and thr->valstack_top <-> thr->valstack MUST NOT have changed,
* because mark-and-sweep must adhere to a strict stack policy.
* In other words, logical bottom and top MUST NOT have changed.
* - All values above the top are unreachable but are initialized
* to UNDEFINED, up to the post-realloc valstack_end.
* - 'old_end_offset' must be computed after realloc to be correct.
*/
DUK_ASSERT((((duk_uint8_t *) thr->valstack_bottom) - ((duk_uint8_t *) thr->valstack)) == old_bottom_offset);
DUK_ASSERT((((duk_uint8_t *) thr->valstack_top) - ((duk_uint8_t *) thr->valstack)) == old_top_offset);
/* success, fixup pointers */
old_end_offset_post = (((duk_uint8_t *) thr->valstack_end) - ((duk_uint8_t *) thr->valstack)); /* must be computed after realloc */
#ifdef DUK_USE_DEBUG
old_valstack_post = thr->valstack;
#endif
thr->valstack = new_valstack;
thr->valstack_end = new_valstack + new_size;
#if !defined(DUK_USE_PREFER_SIZE)
thr->valstack_size = new_size;
#endif
thr->valstack_bottom = (duk_tval *) (void *) ((duk_uint8_t *) new_valstack + old_bottom_offset);
thr->valstack_top = (duk_tval *) (void *) ((duk_uint8_t *) new_valstack + old_top_offset);
DUK_ASSERT(thr->valstack_bottom >= thr->valstack);
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
DUK_ASSERT(thr->valstack_end >= thr->valstack_top);
/* useful for debugging */
#ifdef DUK_USE_DEBUG
if (old_end_offset_pre != old_end_offset_post) {
DUK_D(DUK_DPRINT("valstack was resized during valstack_resize(), probably by mark-and-sweep; "
"end offset changed: %lu -> %lu",
(unsigned long) old_end_offset_pre,
(unsigned long) old_end_offset_post));
}
if (old_valstack_pre != old_valstack_post) {
DUK_D(DUK_DPRINT("valstack pointer changed during valstack_resize(), probably by mark-and-sweep: %p -> %p",
(void *) old_valstack_pre,
(void *) old_valstack_post));
}
#endif
DUK_DD(DUK_DDPRINT("resized valstack to %lu elements (%lu bytes), bottom=%ld, top=%ld, "
"new pointers: start=%p end=%p bottom=%p top=%p",
(unsigned long) new_size, (unsigned long) new_alloc_size,
(long) (thr->valstack_bottom - thr->valstack),
(long) (thr->valstack_top - thr->valstack),
(void *) thr->valstack, (void *) thr->valstack_end,
(void *) thr->valstack_bottom, (void *) thr->valstack_top));
/* Init newly allocated slots (only). */
p = (duk_tval *) (void *) ((duk_uint8_t *) thr->valstack + old_end_offset_post);
while (p < thr->valstack_end) {
/* Never executed if new size is smaller. */
DUK_TVAL_SET_UNDEFINED(p);
p++;
}
/* Assert for value stack initialization policy. */
#if defined(DUK_USE_ASSERTIONS)
p = thr->valstack_top;
while (p < thr->valstack_end) {
DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(p));
p++;
}
#endif
return 1;
}
DUK_INTERNAL
duk_bool_t duk_valstack_resize_raw(duk_context *ctx,
duk_size_t min_new_size,
duk_small_uint_t flags) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_size_t old_size;
duk_size_t new_size;
duk_bool_t is_shrink = 0;
duk_small_uint_t shrink_flag = (flags & DUK_VSRESIZE_FLAG_SHRINK);
duk_small_uint_t compact_flag = (flags & DUK_VSRESIZE_FLAG_COMPACT);
duk_small_uint_t throw_flag = (flags & DUK_VSRESIZE_FLAG_THROW);
DUK_DDD(DUK_DDDPRINT("check valstack resize: min_new_size=%lu, curr_size=%ld, curr_top=%ld, "
"curr_bottom=%ld, shrink=%d, compact=%d, throw=%d",
(unsigned long) min_new_size,
(long) (thr->valstack_end - thr->valstack),
(long) (thr->valstack_top - thr->valstack),
(long) (thr->valstack_bottom - thr->valstack),
(int) shrink_flag, (int) compact_flag, (int) throw_flag));
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->valstack_bottom >= thr->valstack);
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
DUK_ASSERT(thr->valstack_end >= thr->valstack_top);
#if defined(DUK_USE_PREFER_SIZE)
old_size = (duk_size_t) (thr->valstack_end - thr->valstack);
#else
DUK_ASSERT((duk_size_t) (thr->valstack_end - thr->valstack) == thr->valstack_size);
old_size = thr->valstack_size;
#endif
if (min_new_size <= old_size) {
is_shrink = 1;
if (!shrink_flag ||
old_size - min_new_size < DUK_VALSTACK_SHRINK_THRESHOLD) {
DUK_DDD(DUK_DDDPRINT("no need to grow or shrink valstack"));
return 1;
}
}
new_size = min_new_size;
if (!compact_flag) {
if (is_shrink) {
/* shrink case; leave some spare */
new_size += DUK_VALSTACK_SHRINK_SPARE;
}
/* round up roughly to next 'grow step' */
new_size = (new_size / DUK_VALSTACK_GROW_STEP + 1) * DUK_VALSTACK_GROW_STEP;
}
DUK_DD(DUK_DDPRINT("want to %s valstack: %lu -> %lu elements (min_new_size %lu)",
(const char *) (new_size > old_size ? "grow" : "shrink"),
(unsigned long) old_size, (unsigned long) new_size,
(unsigned long) min_new_size));
if (new_size > thr->valstack_max) {
/* Note: may be triggered even if minimal new_size would not reach the limit,
* plan limit accordingly (taking DUK_VALSTACK_GROW_STEP into account).
*/
if (throw_flag) {
DUK_ERROR_RANGE(thr, DUK_STR_VALSTACK_LIMIT);
} else {
return 0;
}
}
/*
* When resizing the valstack, a mark-and-sweep may be triggered for
* the allocation of the new valstack. If the mark-and-sweep needs
* to use our thread for something, it may cause *the same valstack*
* to be resized recursively. This happens e.g. when mark-and-sweep
* finalizers are called. This is taken into account carefully in
* duk__resize_valstack().
*
* 'new_size' is known to be <= valstack_max, which ensures that
* size_t and pointer arithmetic won't wrap in duk__resize_valstack().
*/
if (!duk__resize_valstack(ctx, new_size)) {
if (is_shrink) {
DUK_DD(DUK_DDPRINT("valstack resize failed, but is a shrink, ignore"));
return 1;
}
DUK_DD(DUK_DDPRINT("valstack resize failed"));
if (throw_flag) {
DUK_ERROR_ALLOC_DEFMSG(thr);
} else {
return 0;
}
}
DUK_DDD(DUK_DDDPRINT("valstack resize successful"));
return 1;
}
DUK_EXTERNAL duk_bool_t duk_check_stack(duk_context *ctx, duk_idx_t extra) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_size_t min_new_size;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr != NULL);
if (DUK_UNLIKELY(extra < 0)) {
/* Clamping to zero makes the API more robust to calling code
* calculation errors.
*/
extra = 0;
}
min_new_size = (thr->valstack_top - thr->valstack) + extra + DUK_VALSTACK_INTERNAL_EXTRA;
return duk_valstack_resize_raw(ctx,
min_new_size, /* min_new_size */
0 /* no shrink */ | /* flags */
0 /* no compact */ |
0 /* no throw */);
}
DUK_EXTERNAL void duk_require_stack(duk_context *ctx, duk_idx_t extra) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_size_t min_new_size;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr != NULL);
if (DUK_UNLIKELY(extra < 0)) {
/* Clamping to zero makes the API more robust to calling code
* calculation errors.
*/
extra = 0;
}
min_new_size = (thr->valstack_top - thr->valstack) + extra + DUK_VALSTACK_INTERNAL_EXTRA;
(void) duk_valstack_resize_raw(ctx,
min_new_size, /* min_new_size */
0 /* no shrink */ | /* flags */
0 /* no compact */ |
DUK_VSRESIZE_FLAG_THROW);
}
DUK_EXTERNAL duk_bool_t duk_check_stack_top(duk_context *ctx, duk_idx_t top) {
duk_size_t min_new_size;
DUK_ASSERT_CTX_VALID(ctx);
if (DUK_UNLIKELY(top < 0)) {
/* Clamping to zero makes the API more robust to calling code
* calculation errors.
*/
top = 0;
}
min_new_size = top + DUK_VALSTACK_INTERNAL_EXTRA;
return duk_valstack_resize_raw(ctx,
min_new_size, /* min_new_size */
0 /* no shrink */ | /* flags */
0 /* no compact */ |
0 /* no throw */);
}
DUK_EXTERNAL void duk_require_stack_top(duk_context *ctx, duk_idx_t top) {
duk_size_t min_new_size;
DUK_ASSERT_CTX_VALID(ctx);
if (DUK_UNLIKELY(top < 0)) {
/* Clamping to zero makes the API more robust to calling code
* calculation errors.
*/
top = 0;
}
min_new_size = top + DUK_VALSTACK_INTERNAL_EXTRA;
(void) duk_valstack_resize_raw(ctx,
min_new_size, /* min_new_size */
0 /* no shrink */ | /* flags */
0 /* no compact */ |
DUK_VSRESIZE_FLAG_THROW);
}
/*
* Basic stack manipulation: swap, dup, insert, replace, etc
*/
DUK_EXTERNAL void duk_swap(duk_context *ctx, duk_idx_t index1, duk_idx_t index2) {
duk_tval *tv1;
duk_tval *tv2;
duk_tval tv_tmp;
DUK_ASSERT_CTX_VALID(ctx);
tv1 = duk_require_tval(ctx, index1);
DUK_ASSERT(tv1 != NULL);
tv2 = duk_require_tval(ctx, index2);
DUK_ASSERT(tv2 != NULL);
/* If tv1==tv2 this is a NOP, no check is needed */
DUK_TVAL_SET_TVAL(&tv_tmp, tv1);
DUK_TVAL_SET_TVAL(tv1, tv2);
DUK_TVAL_SET_TVAL(tv2, &tv_tmp);
}
DUK_EXTERNAL void duk_swap_top(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
duk_swap(ctx, index, -1);
}
DUK_EXTERNAL void duk_dup(duk_context *ctx, duk_idx_t from_index) {
duk_hthread *thr;
duk_tval *tv_from;
duk_tval *tv_to;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK__CHECK_SPACE();
tv_from = duk_require_tval(ctx, from_index);
tv_to = thr->valstack_top++;
DUK_ASSERT(tv_from != NULL);
DUK_ASSERT(tv_to != NULL);
DUK_TVAL_SET_TVAL(tv_to, tv_from);
DUK_TVAL_INCREF(thr, tv_to); /* no side effects */
}
DUK_EXTERNAL void duk_dup_top(duk_context *ctx) {
duk_hthread *thr;
duk_tval *tv_from;
duk_tval *tv_to;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK__CHECK_SPACE();
if (thr->valstack_top - thr->valstack_bottom <= 0) {
DUK_ERROR_API_INDEX(thr, -1);
return; /* unreachable */
}
tv_from = thr->valstack_top - 1;
tv_to = thr->valstack_top++;
DUK_ASSERT(tv_from != NULL);
DUK_ASSERT(tv_to != NULL);
DUK_TVAL_SET_TVAL(tv_to, tv_from);
DUK_TVAL_INCREF(thr, tv_to); /* no side effects */
}
DUK_EXTERNAL void duk_insert(duk_context *ctx, duk_idx_t to_index) {
duk_tval *p;
duk_tval *q;
duk_tval tv_tmp;
duk_size_t nbytes;
DUK_ASSERT_CTX_VALID(ctx);
p = duk_require_tval(ctx, to_index);
DUK_ASSERT(p != NULL);
q = duk_require_tval(ctx, -1);
DUK_ASSERT(q != NULL);
DUK_ASSERT(q >= p);
/* nbytes
* <--------->
* [ ... | p | x | x | q ]
* => [ ... | q | p | x | x ]
*/
nbytes = (duk_size_t) (((duk_uint8_t *) q) - ((duk_uint8_t *) p)); /* Note: 'q' is top-1 */
DUK_DDD(DUK_DDDPRINT("duk_insert: to_index=%ld, p=%p, q=%p, nbytes=%lu",
(long) to_index, (void *) p, (void *) q, (unsigned long) nbytes));
/* No net refcount changes. */
if (nbytes > 0) {
DUK_TVAL_SET_TVAL(&tv_tmp, q);
DUK_ASSERT(nbytes > 0);
DUK_MEMMOVE((void *) (p + 1), (const void *) p, (size_t) nbytes);
DUK_TVAL_SET_TVAL(p, &tv_tmp);
} else {
/* nop: insert top to top */
DUK_ASSERT(nbytes == 0);
DUK_ASSERT(p == q);
}
}
DUK_EXTERNAL void duk_replace(duk_context *ctx, duk_idx_t to_index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv1;
duk_tval *tv2;
duk_tval tv_tmp;
DUK_ASSERT_CTX_VALID(ctx);
tv1 = duk_require_tval(ctx, -1);
DUK_ASSERT(tv1 != NULL);
tv2 = duk_require_tval(ctx, to_index);
DUK_ASSERT(tv2 != NULL);
/* For tv1 == tv2, both pointing to stack top, the end result
* is same as duk_pop(ctx).
*/
DUK_TVAL_SET_TVAL(&tv_tmp, tv2);
DUK_TVAL_SET_TVAL(tv2, tv1);
DUK_TVAL_SET_UNDEFINED(tv1);
thr->valstack_top--;
DUK_TVAL_DECREF(thr, &tv_tmp); /* side effects */
}
DUK_EXTERNAL void duk_copy(duk_context *ctx, duk_idx_t from_index, duk_idx_t to_index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv1;
duk_tval *tv2;
DUK_ASSERT_CTX_VALID(ctx);
DUK_UNREF(thr); /* w/o refcounting */
tv1 = duk_require_tval(ctx, from_index);
DUK_ASSERT(tv1 != NULL);
tv2 = duk_require_tval(ctx, to_index);
DUK_ASSERT(tv2 != NULL);
/* For tv1 == tv2, this is a no-op (no explicit check needed). */
DUK_TVAL_SET_TVAL_UPDREF(thr, tv2, tv1); /* side effects */
}
DUK_EXTERNAL void duk_remove(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *p;
duk_tval *q;
#ifdef DUK_USE_REFERENCE_COUNTING
duk_tval tv_tmp;
#endif
duk_size_t nbytes;
DUK_ASSERT_CTX_VALID(ctx);
p = duk_require_tval(ctx, index);
DUK_ASSERT(p != NULL);
q = duk_require_tval(ctx, -1);
DUK_ASSERT(q != NULL);
DUK_ASSERT(q >= p);
/* nbytes zero size case
* <--------->
* [ ... | p | x | x | q ] [ ... | p==q ]
* => [ ... | x | x | q ] [ ... ]
*/
#ifdef DUK_USE_REFERENCE_COUNTING
/* use a temp: decref only when valstack reachable values are correct */
DUK_TVAL_SET_TVAL(&tv_tmp, p);
#endif
nbytes = (duk_size_t) (((duk_uint8_t *) q) - ((duk_uint8_t *) p)); /* Note: 'q' is top-1 */
DUK_MEMMOVE((void *) p, (const void *) (p + 1), (size_t) nbytes); /* zero size not an issue: pointers are valid */
DUK_TVAL_SET_UNDEFINED(q);
thr->valstack_top--;
#ifdef DUK_USE_REFERENCE_COUNTING
DUK_TVAL_DECREF(thr, &tv_tmp); /* side effects */
#endif
}
/*
* Stack slice primitives
*/
DUK_EXTERNAL void duk_xcopymove_raw(duk_context *to_ctx, duk_context *from_ctx, duk_idx_t count, duk_bool_t is_copy) {
duk_hthread *to_thr = (duk_hthread *) to_ctx;
duk_hthread *from_thr = (duk_hthread *) from_ctx;
void *src;
duk_size_t nbytes;
duk_tval *p;
duk_tval *q;
/* XXX: several pointer comparison issues here */
DUK_ASSERT_CTX_VALID(to_ctx);
DUK_ASSERT_CTX_VALID(from_ctx);
DUK_ASSERT(to_ctx != NULL);
DUK_ASSERT(from_ctx != NULL);
if (to_ctx == from_ctx) {
DUK_ERROR_API(to_thr, DUK_STR_INVALID_CONTEXT);
return;
}
if ((count < 0) ||
(count > (duk_idx_t) to_thr->valstack_max)) {
/* Maximum value check ensures 'nbytes' won't wrap below. */
DUK_ERROR_API(to_thr, DUK_STR_INVALID_COUNT);
return;
}
nbytes = sizeof(duk_tval) * count;
if (nbytes == 0) {
return;
}
DUK_ASSERT(to_thr->valstack_top <= to_thr->valstack_end);
if ((duk_size_t) ((duk_uint8_t *) to_thr->valstack_end - (duk_uint8_t *) to_thr->valstack_top) < nbytes) {
DUK_ERROR_API(to_thr, DUK_STR_PUSH_BEYOND_ALLOC_STACK);
}
src = (void *) ((duk_uint8_t *) from_thr->valstack_top - nbytes);
if (src < (void *) from_thr->valstack_bottom) {
DUK_ERROR_API(to_thr, DUK_STR_INVALID_COUNT);
}
/* copy values (no overlap even if to_ctx == from_ctx; that's not
* allowed now anyway)
*/
DUK_ASSERT(nbytes > 0);
DUK_MEMCPY((void *) to_thr->valstack_top, (const void *) src, (size_t) nbytes);
p = to_thr->valstack_top;
to_thr->valstack_top = (duk_tval *) (void *) (((duk_uint8_t *) p) + nbytes);
if (is_copy) {
/* Incref copies, keep originals. */
q = to_thr->valstack_top;
while (p < q) {
DUK_TVAL_INCREF(to_thr, p); /* no side effects */
p++;
}
} else {
/* No net refcount change. */
p = from_thr->valstack_top;
q = (duk_tval *) (void *) (((duk_uint8_t *) p) - nbytes);
from_thr->valstack_top = q;
while (p > q) {
p--;
DUK_TVAL_SET_UNDEFINED(p);
/* XXX: fast primitive to set a bunch of values to UNDEFINED */
}
}
}
/*
* Get/require
*/
DUK_EXTERNAL void duk_require_undefined(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (tv && DUK_TVAL_IS_UNDEFINED(tv)) {
return;
}
DUK_ERROR_REQUIRE_TYPE_INDEX(thr, index, "undefined", DUK_STR_NOT_UNDEFINED);
return; /* not reachable */
}
DUK_EXTERNAL void duk_require_null(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (tv && DUK_TVAL_IS_NULL(tv)) {
return;
}
DUK_ERROR_REQUIRE_TYPE_INDEX(thr, index, "null", DUK_STR_NOT_NULL);
return; /* not reachable */
}
DUK_EXTERNAL duk_bool_t duk_get_boolean(duk_context *ctx, duk_idx_t index) {
duk_bool_t ret = 0; /* default: false */
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (tv && DUK_TVAL_IS_BOOLEAN(tv)) {
ret = DUK_TVAL_GET_BOOLEAN(tv);
}
DUK_ASSERT(ret == 0 || ret == 1);
return ret;
}
DUK_EXTERNAL duk_bool_t duk_require_boolean(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (tv && DUK_TVAL_IS_BOOLEAN(tv)) {
duk_bool_t ret = DUK_TVAL_GET_BOOLEAN(tv);
DUK_ASSERT(ret == 0 || ret == 1);
return ret;
}
DUK_ERROR_REQUIRE_TYPE_INDEX(thr, index, "boolean", DUK_STR_NOT_BOOLEAN);
return 0; /* not reachable */
}
DUK_EXTERNAL duk_double_t duk_get_number(duk_context *ctx, duk_idx_t index) {
duk_double_union ret;
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
ret.d = DUK_DOUBLE_NAN; /* default: NaN */
tv = duk_get_tval(ctx, index);
if (tv && DUK_TVAL_IS_NUMBER(tv)) {
ret.d = DUK_TVAL_GET_NUMBER(tv);
}
/*
* Number should already be in NaN-normalized form, but let's
* normalize anyway.
*/
DUK_DBLUNION_NORMALIZE_NAN_CHECK(&ret);
return ret.d;
}
DUK_EXTERNAL duk_double_t duk_require_number(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (tv && DUK_TVAL_IS_NUMBER(tv)) {
duk_double_union ret;
ret.d = DUK_TVAL_GET_NUMBER(tv);
/*
* Number should already be in NaN-normalized form,
* but let's normalize anyway.
*/
DUK_DBLUNION_NORMALIZE_NAN_CHECK(&ret);
return ret.d;
}
DUK_ERROR_REQUIRE_TYPE_INDEX(thr, index, "number", DUK_STR_NOT_NUMBER);
return DUK_DOUBLE_NAN; /* not reachable */
}
DUK_EXTERNAL duk_int_t duk_get_int(duk_context *ctx, duk_idx_t index) {
/* Custom coercion for API */
DUK_ASSERT_CTX_VALID(ctx);
return (duk_int_t) duk__api_coerce_d2i(ctx, index, 0 /*require*/);
}
DUK_EXTERNAL duk_uint_t duk_get_uint(duk_context *ctx, duk_idx_t index) {
/* Custom coercion for API */
DUK_ASSERT_CTX_VALID(ctx);
return (duk_uint_t) duk__api_coerce_d2ui(ctx, index, 0 /*require*/);
}
DUK_EXTERNAL duk_int_t duk_require_int(duk_context *ctx, duk_idx_t index) {
/* Custom coercion for API */
DUK_ASSERT_CTX_VALID(ctx);
return (duk_int_t) duk__api_coerce_d2i(ctx, index, 1 /*require*/);
}
DUK_EXTERNAL duk_uint_t duk_require_uint(duk_context *ctx, duk_idx_t index) {
/* Custom coercion for API */
DUK_ASSERT_CTX_VALID(ctx);
return (duk_uint_t) duk__api_coerce_d2ui(ctx, index, 1 /*require*/);
}
DUK_EXTERNAL const char *duk_get_lstring(duk_context *ctx, duk_idx_t index, duk_size_t *out_len) {
const char *ret;
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
/* default: NULL, length 0 */
ret = NULL;
if (out_len) {
*out_len = 0;
}
tv = duk_get_tval(ctx, index);
if (tv && DUK_TVAL_IS_STRING(tv)) {
/* Here we rely on duk_hstring instances always being zero
* terminated even if the actual string is not.
*/
duk_hstring *h = DUK_TVAL_GET_STRING(tv);
DUK_ASSERT(h != NULL);
ret = (const char *) DUK_HSTRING_GET_DATA(h);
if (out_len) {
*out_len = DUK_HSTRING_GET_BYTELEN(h);
}
}
return ret;
}
DUK_EXTERNAL const char *duk_require_lstring(duk_context *ctx, duk_idx_t index, duk_size_t *out_len) {
duk_hthread *thr = (duk_hthread *) ctx;
const char *ret;
DUK_ASSERT_CTX_VALID(ctx);
/* Note: this check relies on the fact that even a zero-size string
* has a non-NULL pointer.
*/
ret = duk_get_lstring(ctx, index, out_len);
if (ret) {
return ret;
}
DUK_ERROR_REQUIRE_TYPE_INDEX(thr, index, "string", DUK_STR_NOT_STRING);
return NULL; /* not reachable */
}
DUK_EXTERNAL const char *duk_get_string(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
return duk_get_lstring(ctx, index, NULL);
}
DUK_EXTERNAL const char *duk_require_string(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
return duk_require_lstring(ctx, index, NULL);
}
DUK_EXTERNAL void *duk_get_pointer(duk_context *ctx, duk_idx_t index) {
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (tv && DUK_TVAL_IS_POINTER(tv)) {
void *p = DUK_TVAL_GET_POINTER(tv); /* may be NULL */
return (void *) p;
}
return NULL;
}
DUK_EXTERNAL void *duk_require_pointer(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
/* Note: here we must be wary of the fact that a pointer may be
* valid and be a NULL.
*/
tv = duk_get_tval(ctx, index);
if (tv && DUK_TVAL_IS_POINTER(tv)) {
void *p = DUK_TVAL_GET_POINTER(tv); /* may be NULL */
return (void *) p;
}
DUK_ERROR_REQUIRE_TYPE_INDEX(thr, index, "pointer", DUK_STR_NOT_POINTER);
return NULL; /* not reachable */
}
#if 0 /*unused*/
DUK_INTERNAL void *duk_get_voidptr(duk_context *ctx, duk_idx_t index) {
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (tv && DUK_TVAL_IS_HEAP_ALLOCATED(tv)) {
duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv);
DUK_ASSERT(h != NULL);
return (void *) h;
}
return NULL;
}
#endif
DUK_LOCAL void *duk__get_buffer_helper(duk_context *ctx, duk_idx_t index, duk_size_t *out_size, duk_bool_t throw_flag) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
DUK_UNREF(thr);
if (out_size != NULL) {
*out_size = 0;
}
tv = duk_get_tval(ctx, index);
if (tv && DUK_TVAL_IS_BUFFER(tv)) {
duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv);
DUK_ASSERT(h != NULL);
if (out_size) {
*out_size = DUK_HBUFFER_GET_SIZE(h);
}
return (void *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h); /* may be NULL (but only if size is 0) */
}
if (throw_flag) {
DUK_ERROR_REQUIRE_TYPE_INDEX(thr, index, "buffer", DUK_STR_NOT_BUFFER);
}
return NULL;
}
DUK_EXTERNAL void *duk_get_buffer(duk_context *ctx, duk_idx_t index, duk_size_t *out_size) {
return duk__get_buffer_helper(ctx, index, out_size, 0 /*throw_flag*/);
}
DUK_EXTERNAL void *duk_require_buffer(duk_context *ctx, duk_idx_t index, duk_size_t *out_size) {
return duk__get_buffer_helper(ctx, index, out_size, 1 /*throw_flag*/);
}
DUK_LOCAL void *duk__get_buffer_data_helper(duk_context *ctx, duk_idx_t index, duk_size_t *out_size, duk_bool_t throw_flag) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
DUK_UNREF(thr);
if (out_size != NULL) {
*out_size = 0;
}
tv = duk_get_tval(ctx, index);
if (tv == NULL) {
goto fail;
}
if (DUK_TVAL_IS_BUFFER(tv)) {
duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv);
DUK_ASSERT(h != NULL);
if (out_size) {
*out_size = DUK_HBUFFER_GET_SIZE(h);
}
return (void *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h); /* may be NULL (but only if size is 0) */
} else if (DUK_TVAL_IS_OBJECT(tv)) {
duk_hobject *h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
if (DUK_HOBJECT_IS_BUFFEROBJECT(h)) {
/* XXX: this is probably a useful shared helper: for a
* duk_hbufferobject, get a validated buffer pointer/length.
*/
duk_hbufferobject *h_bufobj = (duk_hbufferobject *) h;
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
if (h_bufobj->buf != NULL &&
DUK_HBUFFEROBJECT_VALID_SLICE(h_bufobj)) {
duk_uint8_t *p;
p = (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_bufobj->buf);
if (out_size != NULL) {
*out_size = (duk_size_t) h_bufobj->length;
}
return (void *) (p + h_bufobj->offset);
}
/* if slice not fully valid, treat as error */
}
}
fail:
if (throw_flag) {
DUK_ERROR_REQUIRE_TYPE_INDEX(thr, index, "buffer", DUK_STR_NOT_BUFFER);
}
return NULL;
}
DUK_EXTERNAL void *duk_get_buffer_data(duk_context *ctx, duk_idx_t index, duk_size_t *out_size) {
return duk__get_buffer_data_helper(ctx, index, out_size, 0 /*throw_flag*/);
}
DUK_EXTERNAL void *duk_require_buffer_data(duk_context *ctx, duk_idx_t index, duk_size_t *out_size) {
return duk__get_buffer_data_helper(ctx, index, out_size, 1 /*throw_flag*/);
}
/* Raw helper for getting a value from the stack, checking its tag.
* The tag cannot be a number because numbers don't have an internal
* tag in the packed representation.
*/
DUK_LOCAL duk_heaphdr *duk__get_tagged_heaphdr_raw(duk_context *ctx, duk_idx_t index, duk_uint_t tag) {
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (tv && (DUK_TVAL_GET_TAG(tv) == tag)) {
duk_heaphdr *ret;
ret = DUK_TVAL_GET_HEAPHDR(tv);
DUK_ASSERT(ret != NULL); /* tagged null pointers should never occur */
return ret;
}
return (duk_heaphdr *) NULL;
}
DUK_INTERNAL duk_hstring *duk_get_hstring(duk_context *ctx, duk_idx_t index) {
return (duk_hstring *) duk__get_tagged_heaphdr_raw(ctx, index, DUK_TAG_STRING);
}
DUK_INTERNAL duk_hstring *duk_require_hstring(duk_context *ctx, duk_idx_t index) {
duk_heaphdr *h;
h = duk__get_tagged_heaphdr_raw(ctx, index, DUK_TAG_STRING);
if (h == NULL) {
DUK_ERROR_REQUIRE_TYPE_INDEX(ctx, index, "string", DUK_STR_NOT_STRING);
}
return (duk_hstring *) h;
}
DUK_INTERNAL duk_hobject *duk_get_hobject(duk_context *ctx, duk_idx_t index) {
return (duk_hobject *) duk__get_tagged_heaphdr_raw(ctx, index, DUK_TAG_OBJECT);
}
DUK_INTERNAL duk_hobject *duk_require_hobject(duk_context *ctx, duk_idx_t index) {
duk_heaphdr *h;
h = duk__get_tagged_heaphdr_raw(ctx, index, DUK_TAG_OBJECT);
if (h == NULL) {
DUK_ERROR_REQUIRE_TYPE_INDEX(ctx, index, "object", DUK_STR_NOT_OBJECT);
}
return (duk_hobject *) h;
}
DUK_INTERNAL duk_hbuffer *duk_get_hbuffer(duk_context *ctx, duk_idx_t index) {
return (duk_hbuffer *) duk__get_tagged_heaphdr_raw(ctx, index, DUK_TAG_BUFFER);
}
DUK_INTERNAL duk_hbuffer *duk_require_hbuffer(duk_context *ctx, duk_idx_t index) {
duk_heaphdr *h;
h = duk__get_tagged_heaphdr_raw(ctx, index, DUK_TAG_BUFFER);
if (h == NULL) {
DUK_ERROR_REQUIRE_TYPE_INDEX(ctx, index, "buffer", DUK_STR_NOT_BUFFER);
}
return (duk_hbuffer *) h;
}
DUK_INTERNAL duk_hthread *duk_get_hthread(duk_context *ctx, duk_idx_t index) {
duk_hobject *h = (duk_hobject *) duk__get_tagged_heaphdr_raw(ctx, index, DUK_TAG_OBJECT);
if (h != NULL && !DUK_HOBJECT_IS_THREAD(h)) {
h = NULL;
}
return (duk_hthread *) h;
}
DUK_INTERNAL duk_hthread *duk_require_hthread(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h = (duk_hobject *) duk__get_tagged_heaphdr_raw(ctx, index, DUK_TAG_OBJECT);
if (!(h != NULL && DUK_HOBJECT_IS_THREAD(h))) {
DUK_ERROR_REQUIRE_TYPE_INDEX(thr, index, "thread", DUK_STR_NOT_THREAD);
}
return (duk_hthread *) h;
}
DUK_INTERNAL duk_hcompiledfunction *duk_get_hcompiledfunction(duk_context *ctx, duk_idx_t index) {
duk_hobject *h = (duk_hobject *) duk__get_tagged_heaphdr_raw(ctx, index, DUK_TAG_OBJECT);
if (h != NULL && !DUK_HOBJECT_IS_COMPILEDFUNCTION(h)) {
h = NULL;
}
return (duk_hcompiledfunction *) h;
}
DUK_INTERNAL duk_hcompiledfunction *duk_require_hcompiledfunction(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h = (duk_hobject *) duk__get_tagged_heaphdr_raw(ctx, index, DUK_TAG_OBJECT);
if (!(h != NULL && DUK_HOBJECT_IS_COMPILEDFUNCTION(h))) {
DUK_ERROR_REQUIRE_TYPE_INDEX(thr, index, "compiledfunction", DUK_STR_NOT_COMPILEDFUNCTION);
}
return (duk_hcompiledfunction *) h;
}
DUK_INTERNAL duk_hnativefunction *duk_get_hnativefunction(duk_context *ctx, duk_idx_t index) {
duk_hobject *h = (duk_hobject *) duk__get_tagged_heaphdr_raw(ctx, index, DUK_TAG_OBJECT);
if (h != NULL && !DUK_HOBJECT_IS_NATIVEFUNCTION(h)) {
h = NULL;
}
return (duk_hnativefunction *) h;
}
DUK_INTERNAL duk_hnativefunction *duk_require_hnativefunction(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h = (duk_hobject *) duk__get_tagged_heaphdr_raw(ctx, index, DUK_TAG_OBJECT);
if (!(h != NULL && DUK_HOBJECT_IS_NATIVEFUNCTION(h))) {
DUK_ERROR_REQUIRE_TYPE_INDEX(thr, index, "nativefunction", DUK_STR_NOT_NATIVEFUNCTION);
}
return (duk_hnativefunction *) h;
}
DUK_EXTERNAL duk_c_function duk_get_c_function(duk_context *ctx, duk_idx_t index) {
duk_tval *tv;
duk_hobject *h;
duk_hnativefunction *f;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (!tv) {
return NULL;
}
if (!DUK_TVAL_IS_OBJECT(tv)) {
return NULL;
}
h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
if (!DUK_HOBJECT_IS_NATIVEFUNCTION(h)) {
return NULL;
}
DUK_ASSERT(DUK_HOBJECT_HAS_NATIVEFUNCTION(h));
f = (duk_hnativefunction *) h;
return f->func;
}
DUK_EXTERNAL duk_c_function duk_require_c_function(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_c_function ret;
DUK_ASSERT_CTX_VALID(ctx);
ret = duk_get_c_function(ctx, index);
if (!ret) {
DUK_ERROR_REQUIRE_TYPE_INDEX(thr, index, "nativefunction", DUK_STR_NOT_NATIVEFUNCTION);
}
return ret;
}
DUK_EXTERNAL void duk_require_function(duk_context *ctx, duk_idx_t index) {
if (!duk_is_function(ctx, index)) {
DUK_ERROR_REQUIRE_TYPE_INDEX((duk_hthread *) ctx, index, "function", DUK_STR_NOT_FUNCTION);
}
}
DUK_EXTERNAL duk_context *duk_get_context(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
return (duk_context *) duk_get_hthread(ctx, index);
}
DUK_EXTERNAL duk_context *duk_require_context(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
return (duk_context *) duk_require_hthread(ctx, index);
}
DUK_EXTERNAL void *duk_get_heapptr(duk_context *ctx, duk_idx_t index) {
duk_tval *tv;
void *ret;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (tv && DUK_TVAL_IS_HEAP_ALLOCATED(tv)) {
ret = (void *) DUK_TVAL_GET_HEAPHDR(tv);
DUK_ASSERT(ret != NULL);
return ret;
}
return (void *) NULL;
}
DUK_EXTERNAL void *duk_require_heapptr(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
void *ret;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_require_tval(ctx, index);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_HEAP_ALLOCATED(tv)) {
ret = (void *) DUK_TVAL_GET_HEAPHDR(tv);
DUK_ASSERT(ret != NULL);
return ret;
}
DUK_ERROR_REQUIRE_TYPE_INDEX(thr, index, "heapobject", DUK_STR_UNEXPECTED_TYPE);
return (void *) NULL; /* not reachable */
}
#if 0
/* This would be pointless: we'd return NULL for both lightfuncs and
* unexpected types.
*/
DUK_INTERNAL duk_hobject *duk_get_hobject_or_lfunc(duk_context *ctx, duk_idx_t index) {
}
#endif
/* Useful for internal call sites where we either expect an object (function)
* or a lightfunc. Accepts an object (returned as is) or a lightfunc (coerced
* to an object). Return value is NULL if value is neither an object nor a
* lightfunc.
*/
DUK_INTERNAL duk_hobject *duk_get_hobject_or_lfunc_coerce(duk_context *ctx, duk_idx_t index) {
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_require_tval(ctx, index);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_OBJECT(tv)) {
return DUK_TVAL_GET_OBJECT(tv);
} else if (DUK_TVAL_IS_LIGHTFUNC(tv)) {
duk_to_object(ctx, index);
return duk_require_hobject(ctx, index);
}
return NULL;
}
/* Useful for internal call sites where we either expect an object (function)
* or a lightfunc. Returns NULL for a lightfunc.
*/
DUK_INTERNAL duk_hobject *duk_require_hobject_or_lfunc(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_require_tval(ctx, index);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_OBJECT(tv)) {
return DUK_TVAL_GET_OBJECT(tv);
} else if (DUK_TVAL_IS_LIGHTFUNC(tv)) {
return NULL;
}
DUK_ERROR_REQUIRE_TYPE_INDEX(thr, index, "object", DUK_STR_NOT_OBJECT);
return NULL; /* not reachable */
}
/* Useful for internal call sites where we either expect an object (function)
* or a lightfunc. Accepts an object (returned as is) or a lightfunc (coerced
* to an object). Return value is never NULL.
*/
DUK_INTERNAL duk_hobject *duk_require_hobject_or_lfunc_coerce(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_require_tval(ctx, index);
if (DUK_TVAL_IS_OBJECT(tv)) {
return DUK_TVAL_GET_OBJECT(tv);
} else if (DUK_TVAL_IS_LIGHTFUNC(tv)) {
duk_to_object(ctx, index);
return duk_require_hobject(ctx, index);
}
DUK_ERROR_REQUIRE_TYPE_INDEX(thr, index, "object", DUK_STR_NOT_OBJECT);
return NULL; /* not reachable */
}
DUK_INTERNAL duk_hobject *duk_get_hobject_with_class(duk_context *ctx, duk_idx_t index, duk_small_uint_t classnum) {
duk_hobject *h;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT_DISABLE(classnum >= 0); /* unsigned */
DUK_ASSERT(classnum <= DUK_HOBJECT_CLASS_MAX);
h = (duk_hobject *) duk__get_tagged_heaphdr_raw(ctx, index, DUK_TAG_OBJECT);
if (h != NULL && DUK_HOBJECT_GET_CLASS_NUMBER(h) != classnum) {
h = NULL;
}
return h;
}
DUK_INTERNAL duk_hobject *duk_require_hobject_with_class(duk_context *ctx, duk_idx_t index, duk_small_uint_t classnum) {
duk_hthread *thr;
duk_hobject *h;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT_DISABLE(classnum >= 0); /* unsigned */
DUK_ASSERT(classnum <= DUK_HOBJECT_CLASS_MAX);
thr = (duk_hthread *) ctx;
h = (duk_hobject *) duk__get_tagged_heaphdr_raw(ctx, index, DUK_TAG_OBJECT);
if (!(h != NULL && DUK_HOBJECT_GET_CLASS_NUMBER(h) == classnum)) {
duk_hstring *h_class;
h_class = DUK_HTHREAD_GET_STRING(thr, DUK_HOBJECT_CLASS_NUMBER_TO_STRIDX(classnum));
DUK_UNREF(h_class);
DUK_ERROR_REQUIRE_TYPE_INDEX(thr, index, (const char *) DUK_HSTRING_GET_DATA(h_class), DUK_STR_UNEXPECTED_TYPE);
}
return h;
}
DUK_EXTERNAL duk_size_t duk_get_length(duk_context *ctx, duk_idx_t index) {
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (!tv) {
return 0;
}
switch (DUK_TVAL_GET_TAG(tv)) {
case DUK_TAG_UNDEFINED:
case DUK_TAG_NULL:
case DUK_TAG_BOOLEAN:
case DUK_TAG_POINTER:
return 0;
case DUK_TAG_STRING: {
duk_hstring *h = DUK_TVAL_GET_STRING(tv);
DUK_ASSERT(h != NULL);
return (duk_size_t) DUK_HSTRING_GET_CHARLEN(h);
}
case DUK_TAG_OBJECT: {
duk_hobject *h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
return (duk_size_t) duk_hobject_get_length((duk_hthread *) ctx, h);
}
case DUK_TAG_BUFFER: {
duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv);
DUK_ASSERT(h != NULL);
return (duk_size_t) DUK_HBUFFER_GET_SIZE(h);
}
case DUK_TAG_LIGHTFUNC: {
duk_small_uint_t lf_flags;
lf_flags = DUK_TVAL_GET_LIGHTFUNC_FLAGS(tv);
return (duk_size_t) DUK_LFUNC_FLAGS_GET_LENGTH(lf_flags);
}
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT:
#endif
default:
/* number */
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
return 0;
}
DUK_UNREACHABLE();
}
DUK_INTERNAL void duk_set_length(duk_context *ctx, duk_idx_t index, duk_size_t length) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h;
DUK_ASSERT_CTX_VALID(ctx);
h = duk_get_hobject(ctx, index);
if (!h) {
return;
}
duk_hobject_set_length(thr, h, (duk_uint32_t) length); /* XXX: typing */
}
/*
* Conversions and coercions
*
* The conversion/coercions are in-place operations on the value stack.
* Some operations are implemented here directly, while others call a
* helper in duk_js_ops.c after validating arguments.
*/
/* E5 Section 8.12.8 */
DUK_LOCAL duk_bool_t duk__defaultvalue_coerce_attempt(duk_context *ctx, duk_idx_t index, duk_small_int_t func_stridx) {
if (duk_get_prop_stridx(ctx, index, func_stridx)) {
/* [ ... func ] */
if (duk_is_callable(ctx, -1)) {
duk_dup(ctx, index); /* -> [ ... func this ] */
duk_call_method(ctx, 0); /* -> [ ... retval ] */
if (duk_is_primitive(ctx, -1)) {
duk_replace(ctx, index);
return 1;
}
/* [ ... retval ]; popped below */
}
}
duk_pop(ctx); /* [ ... func/retval ] -> [ ... ] */
return 0;
}
DUK_EXTERNAL void duk_to_defaultvalue(duk_context *ctx, duk_idx_t index, duk_int_t hint) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *obj;
/* inline initializer for coercers[] is not allowed by old compilers like BCC */
duk_small_int_t coercers[2];
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr != NULL);
coercers[0] = DUK_STRIDX_VALUE_OF;
coercers[1] = DUK_STRIDX_TO_STRING;
index = duk_require_normalize_index(ctx, index);
obj = duk_require_hobject_or_lfunc(ctx, index);
if (hint == DUK_HINT_NONE) {
if (obj != NULL && DUK_HOBJECT_GET_CLASS_NUMBER(obj) == DUK_HOBJECT_CLASS_DATE) {
hint = DUK_HINT_STRING;
} else {
hint = DUK_HINT_NUMBER;
}
}
if (hint == DUK_HINT_STRING) {
coercers[0] = DUK_STRIDX_TO_STRING;
coercers[1] = DUK_STRIDX_VALUE_OF;
}
if (duk__defaultvalue_coerce_attempt(ctx, index, coercers[0])) {
return;
}
if (duk__defaultvalue_coerce_attempt(ctx, index, coercers[1])) {
return;
}
DUK_ERROR_TYPE(thr, DUK_STR_DEFAULTVALUE_COERCE_FAILED);
}
DUK_EXTERNAL void duk_to_undefined(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
DUK_UNREF(thr);
tv = duk_require_tval(ctx, index);
DUK_ASSERT(tv != NULL);
DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv); /* side effects */
}
DUK_EXTERNAL void duk_to_null(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
DUK_UNREF(thr);
tv = duk_require_tval(ctx, index);
DUK_ASSERT(tv != NULL);
DUK_TVAL_SET_NULL_UPDREF(thr, tv); /* side effects */
}
/* E5 Section 9.1 */
DUK_EXTERNAL void duk_to_primitive(duk_context *ctx, duk_idx_t index, duk_int_t hint) {
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(hint == DUK_HINT_NONE || hint == DUK_HINT_NUMBER || hint == DUK_HINT_STRING);
index = duk_require_normalize_index(ctx, index);
if (!duk_check_type_mask(ctx, index, DUK_TYPE_MASK_OBJECT |
DUK_TYPE_MASK_LIGHTFUNC)) {
/* everything except object stay as is */
return;
}
duk_to_defaultvalue(ctx, index, hint);
}
/* E5 Section 9.2 */
DUK_EXTERNAL duk_bool_t duk_to_boolean(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
duk_bool_t val;
DUK_ASSERT_CTX_VALID(ctx);
DUK_UNREF(thr);
index = duk_require_normalize_index(ctx, index);
tv = duk_require_tval(ctx, index);
DUK_ASSERT(tv != NULL);
val = duk_js_toboolean(tv);
DUK_ASSERT(val == 0 || val == 1);
/* Note: no need to re-lookup tv, conversion is side effect free */
DUK_ASSERT(tv != NULL);
DUK_TVAL_SET_BOOLEAN_UPDREF(thr, tv, val); /* side effects */
return val;
}
DUK_EXTERNAL duk_double_t duk_to_number(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
duk_double_t d;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_require_tval(ctx, index);
DUK_ASSERT(tv != NULL);
/* XXX: fastint? */
d = duk_js_tonumber(thr, tv);
/* Note: need to re-lookup because ToNumber() may have side effects */
tv = duk_require_tval(ctx, index);
DUK_TVAL_SET_NUMBER_UPDREF(thr, tv, d); /* side effects */
return d;
}
/* XXX: combine all the integer conversions: they share everything
* but the helper function for coercion.
*/
typedef duk_double_t (*duk__toint_coercer)(duk_hthread *thr, duk_tval *tv);
DUK_LOCAL duk_double_t duk__to_int_uint_helper(duk_context *ctx, duk_idx_t index, duk__toint_coercer coerce_func) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
duk_double_t d;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_require_tval(ctx, index);
DUK_ASSERT(tv != NULL);
d = coerce_func(thr, tv);
/* XXX: fastint? */
/* Relookup in case coerce_func() has side effects, e.g. ends up coercing an object */
tv = duk_require_tval(ctx, index);
DUK_TVAL_SET_NUMBER_UPDREF(thr, tv, d); /* side effects */
return d;
}
DUK_EXTERNAL duk_int_t duk_to_int(duk_context *ctx, duk_idx_t index) {
/* Value coercion (in stack): ToInteger(), E5 Section 9.4
* API return value coercion: custom
*/
DUK_ASSERT_CTX_VALID(ctx);
(void) duk__to_int_uint_helper(ctx, index, duk_js_tointeger);
return (duk_int_t) duk__api_coerce_d2i(ctx, index, 0 /*require*/);
}
DUK_EXTERNAL duk_uint_t duk_to_uint(duk_context *ctx, duk_idx_t index) {
/* Value coercion (in stack): ToInteger(), E5 Section 9.4
* API return value coercion: custom
*/
DUK_ASSERT_CTX_VALID(ctx);
(void) duk__to_int_uint_helper(ctx, index, duk_js_tointeger);
return (duk_uint_t) duk__api_coerce_d2ui(ctx, index, 0 /*require*/);
}
DUK_EXTERNAL duk_int32_t duk_to_int32(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
duk_int32_t ret;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_require_tval(ctx, index);
DUK_ASSERT(tv != NULL);
ret = duk_js_toint32(thr, tv);
/* Relookup in case coerce_func() has side effects, e.g. ends up coercing an object */
tv = duk_require_tval(ctx, index);
DUK_TVAL_SET_FASTINT_I32_UPDREF(thr, tv, ret); /* side effects */
return ret;
}
DUK_EXTERNAL duk_uint32_t duk_to_uint32(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
duk_uint32_t ret;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_require_tval(ctx, index);
DUK_ASSERT(tv != NULL);
ret = duk_js_touint32(thr, tv);
/* Relookup in case coerce_func() has side effects, e.g. ends up coercing an object */
tv = duk_require_tval(ctx, index);
DUK_TVAL_SET_FASTINT_U32_UPDREF(thr, tv, ret); /* side effects */
return ret;
}
DUK_EXTERNAL duk_uint16_t duk_to_uint16(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
duk_uint16_t ret;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_require_tval(ctx, index);
DUK_ASSERT(tv != NULL);
ret = duk_js_touint16(thr, tv);
/* Relookup in case coerce_func() has side effects, e.g. ends up coercing an object */
tv = duk_require_tval(ctx, index);
DUK_TVAL_SET_FASTINT_U32_UPDREF(thr, tv, ret); /* side effects */
return ret;
}
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
/* Special coercion for Uint8ClampedArray. */
DUK_INTERNAL duk_uint8_t duk_to_uint8clamped(duk_context *ctx, duk_idx_t index) {
duk_double_t d;
duk_double_t t;
duk_uint8_t ret;
/* XXX: Simplify this algorithm, should be possible to come up with
* a shorter and faster algorithm by inspecting IEEE representation
* directly.
*/
d = duk_to_number(ctx, index);
if (d <= 0.0) {
return 0;
} else if (d >= 255) {
return 255;
} else if (DUK_ISNAN(d)) {
/* Avoid NaN-to-integer coercion as it is compiler specific. */
return 0;
}
t = d - DUK_FLOOR(d);
if (t == 0.5) {
/* Exact halfway, round to even. */
ret = (duk_uint8_t) d;
ret = (ret + 1) & 0xfe; /* Example: d=3.5, t=0.5 -> ret = (3 + 1) & 0xfe = 4 & 0xfe = 4
* Example: d=4.5, t=0.5 -> ret = (4 + 1) & 0xfe = 5 & 0xfe = 4
*/
} else {
/* Not halfway, round to nearest. */
ret = (duk_uint8_t) (d + 0.5);
}
return ret;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_EXTERNAL const char *duk_to_lstring(duk_context *ctx, duk_idx_t index, duk_size_t *out_len) {
DUK_ASSERT_CTX_VALID(ctx);
(void) duk_to_string(ctx, index);
return duk_require_lstring(ctx, index, out_len);
}
DUK_LOCAL duk_ret_t duk__safe_to_string_raw(duk_context *ctx) {
DUK_ASSERT_CTX_VALID(ctx);
duk_to_string(ctx, -1);
return 1;
}
DUK_EXTERNAL const char *duk_safe_to_lstring(duk_context *ctx, duk_idx_t index, duk_size_t *out_len) {
DUK_ASSERT_CTX_VALID(ctx);
index = duk_require_normalize_index(ctx, index);
/* We intentionally ignore the duk_safe_call() return value and only
* check the output type. This way we don't also need to check that
* the returned value is indeed a string in the success case.
*/
duk_dup(ctx, index);
(void) duk_safe_call(ctx, duk__safe_to_string_raw, 1 /*nargs*/, 1 /*nrets*/);
if (!duk_is_string(ctx, -1)) {
/* Error: try coercing error to string once. */
(void) duk_safe_call(ctx, duk__safe_to_string_raw, 1 /*nargs*/, 1 /*nrets*/);
if (!duk_is_string(ctx, -1)) {
/* Double error */
duk_pop(ctx);
duk_push_hstring_stridx(ctx, DUK_STRIDX_UC_ERROR);
} else {
;
}
} else {
;
}
DUK_ASSERT(duk_is_string(ctx, -1));
DUK_ASSERT(duk_get_string(ctx, -1) != NULL);
duk_replace(ctx, index);
return duk_get_lstring(ctx, index, out_len);
}
#if defined(DUK_USE_DEBUGGER_SUPPORT) /* only needed by debugger for now */
DUK_INTERNAL duk_hstring *duk_safe_to_hstring(duk_context *ctx, duk_idx_t index) {
(void) duk_safe_to_string(ctx, index);
DUK_ASSERT(duk_is_string(ctx, index));
DUK_ASSERT(duk_get_hstring(ctx, index) != NULL);
return duk_get_hstring(ctx, index);
}
#endif
/* Coerce top into Object.prototype.toString() output. */
DUK_INTERNAL void duk_to_object_class_string_top(duk_context *ctx) {
duk_hthread *thr;
duk_uint_t typemask;
duk_hstring *h_strclass;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
typemask = duk_get_type_mask(ctx, -1);
if (typemask & DUK_TYPE_MASK_UNDEFINED) {
h_strclass = DUK_HTHREAD_STRING_UC_UNDEFINED(thr);
} else if (typemask & DUK_TYPE_MASK_NULL) {
h_strclass = DUK_HTHREAD_STRING_UC_NULL(thr);
} else {
duk_hobject *h_obj;
duk_to_object(ctx, -1);
h_obj = duk_get_hobject(ctx, -1);
DUK_ASSERT(h_obj != NULL);
h_strclass = DUK_HOBJECT_GET_CLASS_STRING(thr->heap, h_obj);
}
DUK_ASSERT(h_strclass != NULL);
duk_pop(ctx);
duk_push_sprintf(ctx, "[object %s]", (const char *) DUK_HSTRING_GET_DATA(h_strclass));
}
#if !defined(DUK_USE_PARANOID_ERRORS)
DUK_INTERNAL void duk_push_hobject_class_string(duk_context *ctx, duk_hobject *h) {
duk_hthread *thr;
duk_hstring *h_strclass;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(h != NULL);
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
h_strclass = DUK_HOBJECT_GET_CLASS_STRING(thr->heap, h);
DUK_ASSERT(h_strclass != NULL);
duk_push_sprintf(ctx, "[object %s]", (const char *) DUK_HSTRING_GET_DATA(h_strclass));
}
#endif /* !DUK_USE_PARANOID_ERRORS */
/* XXX: other variants like uint, u32 etc */
DUK_INTERNAL duk_int_t duk_to_int_clamped_raw(duk_context *ctx, duk_idx_t index, duk_int_t minval, duk_int_t maxval, duk_bool_t *out_clamped) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
duk_tval tv_tmp;
duk_double_t d, dmin, dmax;
duk_int_t res;
duk_bool_t clamped = 0;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_require_tval(ctx, index);
DUK_ASSERT(tv != NULL);
d = duk_js_tointeger(thr, tv); /* E5 Section 9.4, ToInteger() */
dmin = (duk_double_t) minval;
dmax = (duk_double_t) maxval;
if (d < dmin) {
clamped = 1;
res = minval;
d = dmin;
} else if (d > dmax) {
clamped = 1;
res = maxval;
d = dmax;
} else {
res = (duk_int_t) d;
}
DUK_UNREF(d); /* SCANBUILD: with suitable dmin/dmax limits 'd' is unused */
/* 'd' and 'res' agree here */
/* Relookup in case duk_js_tointeger() ends up e.g. coercing an object. */
tv = duk_get_tval(ctx, index);
DUK_ASSERT(tv != NULL); /* not popped by side effect */
DUK_TVAL_SET_TVAL(&tv_tmp, tv);
#if defined(DUK_USE_FASTINT)
#if (DUK_INT_MAX <= 0x7fffffffL)
DUK_TVAL_SET_FASTINT_I32(tv, res);
#else
/* Clamping needed if duk_int_t is 64 bits. */
if (res >= DUK_FASTINT_MIN && res <= DUK_FASTINT_MAX) {
DUK_TVAL_SET_FASTINT(tv, res);
} else {
DUK_TVAL_SET_NUMBER(tv, d);
}
#endif
#else
DUK_TVAL_SET_NUMBER(tv, d); /* no need to incref */
#endif
DUK_TVAL_DECREF(thr, &tv_tmp); /* side effects */
if (out_clamped) {
*out_clamped = clamped;
} else {
/* coerced value is updated to value stack even when RangeError thrown */
if (clamped) {
DUK_ERROR_RANGE(thr, DUK_STR_NUMBER_OUTSIDE_RANGE);
}
}
return res;
}
DUK_INTERNAL duk_int_t duk_to_int_clamped(duk_context *ctx, duk_idx_t index, duk_idx_t minval, duk_idx_t maxval) {
duk_bool_t dummy;
return duk_to_int_clamped_raw(ctx, index, minval, maxval, &dummy);
}
DUK_INTERNAL duk_int_t duk_to_int_check_range(duk_context *ctx, duk_idx_t index, duk_int_t minval, duk_int_t maxval) {
return duk_to_int_clamped_raw(ctx, index, minval, maxval, NULL); /* out_clamped==NULL -> RangeError if outside range */
}
DUK_EXTERNAL const char *duk_to_string(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
DUK_UNREF(thr);
index = duk_require_normalize_index(ctx, index);
tv = duk_require_tval(ctx, index);
DUK_ASSERT(tv != NULL);
switch (DUK_TVAL_GET_TAG(tv)) {
case DUK_TAG_UNDEFINED: {
duk_push_hstring_stridx(ctx, DUK_STRIDX_LC_UNDEFINED);
break;
}
case DUK_TAG_NULL: {
duk_push_hstring_stridx(ctx, DUK_STRIDX_LC_NULL);
break;
}
case DUK_TAG_BOOLEAN: {
if (DUK_TVAL_GET_BOOLEAN(tv)) {
duk_push_hstring_stridx(ctx, DUK_STRIDX_TRUE);
} else {
duk_push_hstring_stridx(ctx, DUK_STRIDX_FALSE);
}
break;
}
case DUK_TAG_STRING: {
/* nop */
goto skip_replace;
}
case DUK_TAG_OBJECT: {
duk_to_primitive(ctx, index, DUK_HINT_STRING);
return duk_to_string(ctx, index); /* Note: recursive call */
}
case DUK_TAG_BUFFER: {
duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv);
/* Note: this allows creation of internal strings. */
DUK_ASSERT(h != NULL);
duk_push_lstring(ctx,
(const char *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h),
(duk_size_t) DUK_HBUFFER_GET_SIZE(h));
break;
}
case DUK_TAG_POINTER: {
void *ptr = DUK_TVAL_GET_POINTER(tv);
if (ptr != NULL) {
duk_push_sprintf(ctx, DUK_STR_FMT_PTR, (void *) ptr);
} else {
/* Represent a null pointer as 'null' to be consistent with
* the JX format variant. Native '%p' format for a NULL
* pointer may be e.g. '(nil)'.
*/
duk_push_hstring_stridx(ctx, DUK_STRIDX_LC_NULL);
}
break;
}
case DUK_TAG_LIGHTFUNC: {
/* Should match Function.prototype.toString() */
duk_push_lightfunc_tostring(ctx, tv);
break;
}
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT:
#endif
default: {
/* number */
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
duk_push_tval(ctx, tv);
duk_numconv_stringify(ctx,
10 /*radix*/,
0 /*precision:shortest*/,
0 /*force_exponential*/);
break;
}
}
duk_replace(ctx, index);
skip_replace:
return duk_require_string(ctx, index);
}
DUK_INTERNAL duk_hstring *duk_to_hstring(duk_context *ctx, duk_idx_t index) {
duk_hstring *ret;
DUK_ASSERT_CTX_VALID(ctx);
duk_to_string(ctx, index);
ret = duk_get_hstring(ctx, index);
DUK_ASSERT(ret != NULL);
return ret;
}
DUK_EXTERNAL void *duk_to_buffer_raw(duk_context *ctx, duk_idx_t index, duk_size_t *out_size, duk_uint_t mode) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hbuffer *h_buf;
const duk_uint8_t *src_data;
duk_size_t src_size;
duk_uint8_t *dst_data;
DUK_ASSERT_CTX_VALID(ctx);
DUK_UNREF(thr);
index = duk_require_normalize_index(ctx, index);
h_buf = duk_get_hbuffer(ctx, index);
if (h_buf != NULL) {
/* Buffer is kept as is, with the fixed/dynamic nature of the
* buffer only changed if requested. An external buffer
* is converted into a non-external dynamic buffer in a
* duk_to_dynamic_buffer() call.
*/
duk_uint_t tmp;
duk_uint8_t *tmp_ptr;
tmp_ptr = (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_buf);
src_data = (const duk_uint8_t *) tmp_ptr;
src_size = DUK_HBUFFER_GET_SIZE(h_buf);
tmp = (DUK_HBUFFER_HAS_DYNAMIC(h_buf) ? DUK_BUF_MODE_DYNAMIC : DUK_BUF_MODE_FIXED);
if ((tmp == mode && !DUK_HBUFFER_HAS_EXTERNAL(h_buf)) ||
mode == DUK_BUF_MODE_DONTCARE) {
/* Note: src_data may be NULL if input is a zero-size
* dynamic buffer.
*/
dst_data = tmp_ptr;
goto skip_copy;
}
} else {
/* Non-buffer value is first ToString() coerced, then converted
* to a buffer (fixed buffer is used unless a dynamic buffer is
* explicitly requested).
*/
src_data = (const duk_uint8_t *) duk_to_lstring(ctx, index, &src_size);
}
dst_data = (duk_uint8_t *) duk_push_buffer(ctx, src_size, (mode == DUK_BUF_MODE_DYNAMIC) /*dynamic*/);
if (DUK_LIKELY(src_size > 0)) {
/* When src_size == 0, src_data may be NULL (if source
* buffer is dynamic), and dst_data may be NULL (if
* target buffer is dynamic). Avoid zero-size memcpy()
* with an invalid pointer.
*/
DUK_MEMCPY((void *) dst_data, (const void *) src_data, (size_t) src_size);
}
duk_replace(ctx, index);
skip_copy:
if (out_size) {
*out_size = src_size;
}
return dst_data;
}
DUK_EXTERNAL void *duk_to_pointer(duk_context *ctx, duk_idx_t index) {
duk_tval *tv;
void *res;
DUK_ASSERT_CTX_VALID(ctx);
index = duk_require_normalize_index(ctx, index);
tv = duk_require_tval(ctx, index);
DUK_ASSERT(tv != NULL);
switch (DUK_TVAL_GET_TAG(tv)) {
case DUK_TAG_UNDEFINED:
case DUK_TAG_NULL:
case DUK_TAG_BOOLEAN:
res = NULL;
break;
case DUK_TAG_POINTER:
res = DUK_TVAL_GET_POINTER(tv);
break;
case DUK_TAG_STRING:
case DUK_TAG_OBJECT:
case DUK_TAG_BUFFER:
/* Heap allocated: return heap pointer which is NOT useful
* for the caller, except for debugging.
*/
res = (void *) DUK_TVAL_GET_HEAPHDR(tv);
break;
case DUK_TAG_LIGHTFUNC:
/* Function pointers do not always cast correctly to void *
* (depends on memory and segmentation model for instance),
* so they coerce to NULL.
*/
res = NULL;
break;
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT:
#endif
default:
/* number */
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
res = NULL;
break;
}
duk_push_pointer(ctx, res);
duk_replace(ctx, index);
return res;
}
DUK_EXTERNAL void duk_to_object(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
duk_uint_t flags = 0; /* shared flags for a subset of types */
duk_small_int_t proto = 0;
DUK_ASSERT_CTX_VALID(ctx);
index = duk_require_normalize_index(ctx, index);
tv = duk_require_tval(ctx, index);
DUK_ASSERT(tv != NULL);
switch (DUK_TVAL_GET_TAG(tv)) {
case DUK_TAG_UNDEFINED:
case DUK_TAG_NULL: {
DUK_ERROR_TYPE(thr, DUK_STR_NOT_OBJECT_COERCIBLE);
break;
}
case DUK_TAG_BOOLEAN: {
flags = DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_BOOLEAN);
proto = DUK_BIDX_BOOLEAN_PROTOTYPE;
goto create_object;
}
case DUK_TAG_STRING: {
flags = DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_STRING);
proto = DUK_BIDX_STRING_PROTOTYPE;
goto create_object;
}
case DUK_TAG_OBJECT: {
/* nop */
break;
}
case DUK_TAG_BUFFER: {
/* A plain buffer coerces to a Duktape.Buffer because it's the
* object counterpart of the plain buffer value. But it might
* still make more sense to produce an ArrayBuffer here?
*/
duk_hbufferobject *h_bufobj;
duk_hbuffer *h_val;
h_val = DUK_TVAL_GET_BUFFER(tv);
DUK_ASSERT(h_val != NULL);
h_bufobj = duk_push_bufferobject_raw(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_BUFFEROBJECT |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_BUFFER),
DUK_BIDX_BUFFER_PROTOTYPE);
DUK_ASSERT(h_bufobj != NULL);
DUK_ASSERT(DUK_HOBJECT_HAS_EXTENSIBLE((duk_hobject *) h_bufobj));
DUK_ASSERT(DUK_HOBJECT_IS_BUFFEROBJECT((duk_hobject *) h_bufobj));
h_bufobj->buf = h_val;
DUK_HBUFFER_INCREF(thr, h_val);
DUK_ASSERT(h_bufobj->offset == 0);
h_bufobj->length = (duk_uint_t) DUK_HBUFFER_GET_SIZE(h_val);
DUK_ASSERT(h_bufobj->shift == 0);
DUK_ASSERT(h_bufobj->elem_type == DUK_HBUFFEROBJECT_ELEM_UINT8);
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
goto replace_value;
}
case DUK_TAG_POINTER: {
flags = DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_POINTER);
proto = DUK_BIDX_POINTER_PROTOTYPE;
goto create_object;
}
case DUK_TAG_LIGHTFUNC: {
/* Lightfunc coerces to a Function instance with concrete
* properties. Since 'length' is virtual for Duktape/C
* functions, don't need to define that.
*
* The result is made extensible to mimic what happens to
* strings:
* > Object.isExtensible(Object('foo'))
* true
*/
duk_small_uint_t lf_flags;
duk_idx_t nargs;
duk_small_uint_t lf_len;
duk_c_function func;
duk_hnativefunction *nf;
DUK_TVAL_GET_LIGHTFUNC(tv, func, lf_flags);
nargs = (duk_idx_t) DUK_LFUNC_FLAGS_GET_NARGS(lf_flags);
if (nargs == DUK_LFUNC_NARGS_VARARGS) {
nargs = (duk_idx_t) DUK_VARARGS;
}
flags = DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_CONSTRUCTABLE |
DUK_HOBJECT_FLAG_NATIVEFUNCTION |
DUK_HOBJECT_FLAG_NEWENV |
DUK_HOBJECT_FLAG_STRICT |
DUK_HOBJECT_FLAG_NOTAIL |
/* DUK_HOBJECT_FLAG_EXOTIC_DUKFUNC: omitted here intentionally */
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_FUNCTION);
(void) duk__push_c_function_raw(ctx, func, nargs, flags);
lf_len = DUK_LFUNC_FLAGS_GET_LENGTH(lf_flags);
if ((duk_idx_t) lf_len != nargs) {
/* Explicit length is only needed if it differs from 'nargs'. */
duk_push_int(ctx, (duk_int_t) lf_len);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_NONE);
}
duk_push_lightfunc_name(ctx, tv);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_NONE);
nf = duk_get_hnativefunction(ctx, -1);
DUK_ASSERT(nf != NULL);
nf->magic = (duk_int16_t) DUK_LFUNC_FLAGS_GET_MAGIC(lf_flags);
/* Enable DUKFUNC exotic behavior once properties are set up. */
DUK_HOBJECT_SET_EXOTIC_DUKFUNC((duk_hobject *) nf);
goto replace_value;
}
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT:
#endif
default: {
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
flags = DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_NUMBER);
proto = DUK_BIDX_NUMBER_PROTOTYPE;
goto create_object;
}
}
return;
create_object:
(void) duk_push_object_helper(ctx, flags, proto);
/* Note: Boolean prototype's internal value property is not writable,
* but duk_xdef_prop_stridx() disregards the write protection. Boolean
* instances are immutable.
*
* String and buffer special behaviors are already enabled which is not
* ideal, but a write to the internal value is not affected by them.
*/
duk_dup(ctx, index);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE);
replace_value:
duk_replace(ctx, index);
}
/*
* Type checking
*/
DUK_LOCAL duk_bool_t duk__tag_check(duk_context *ctx, duk_idx_t index, duk_small_uint_t tag) {
duk_tval *tv;
tv = duk_get_tval(ctx, index);
if (!tv) {
return 0;
}
return (DUK_TVAL_GET_TAG(tv) == tag);
}
DUK_LOCAL duk_bool_t duk__obj_flag_any_default_false(duk_context *ctx, duk_idx_t index, duk_uint_t flag_mask) {
duk_hobject *obj;
DUK_ASSERT_CTX_VALID(ctx);
obj = duk_get_hobject(ctx, index);
if (obj) {
return (DUK_HEAPHDR_CHECK_FLAG_BITS((duk_heaphdr *) obj, flag_mask) ? 1 : 0);
}
return 0;
}
DUK_EXTERNAL duk_int_t duk_get_type(duk_context *ctx, duk_idx_t index) {
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (!tv) {
return DUK_TYPE_NONE;
}
switch (DUK_TVAL_GET_TAG(tv)) {
case DUK_TAG_UNDEFINED:
return DUK_TYPE_UNDEFINED;
case DUK_TAG_NULL:
return DUK_TYPE_NULL;
case DUK_TAG_BOOLEAN:
return DUK_TYPE_BOOLEAN;
case DUK_TAG_STRING:
return DUK_TYPE_STRING;
case DUK_TAG_OBJECT:
return DUK_TYPE_OBJECT;
case DUK_TAG_BUFFER:
return DUK_TYPE_BUFFER;
case DUK_TAG_POINTER:
return DUK_TYPE_POINTER;
case DUK_TAG_LIGHTFUNC:
return DUK_TYPE_LIGHTFUNC;
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT:
#endif
default:
/* Note: number has no explicit tag (in 8-byte representation) */
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
return DUK_TYPE_NUMBER;
}
DUK_UNREACHABLE();
}
#if defined(DUK_USE_VERBOSE_ERRORS) && defined(DUK_USE_PARANOID_ERRORS)
DUK_LOCAL const char *duk__type_names[] = {
"none",
"undefined",
"null",
"boolean",
"number",
"string",
"object",
"buffer",
"pointer",
"lightfunc"
};
DUK_INTERNAL const char *duk_get_type_name(duk_context *ctx, duk_idx_t index) {
duk_int_t type_tag;
type_tag = duk_get_type(ctx, index);
DUK_ASSERT(type_tag >= DUK_TYPE_MIN && type_tag <= DUK_TYPE_MAX);
DUK_ASSERT(DUK_TYPE_MIN == 0 && sizeof(duk__type_names) / sizeof(const char *) == DUK_TYPE_MAX + 1);
return duk__type_names[type_tag];
}
#endif
DUK_EXTERNAL duk_bool_t duk_check_type(duk_context *ctx, duk_idx_t index, duk_int_t type) {
DUK_ASSERT_CTX_VALID(ctx);
return (duk_get_type(ctx, index) == type) ? 1 : 0;
}
DUK_EXTERNAL duk_uint_t duk_get_type_mask(duk_context *ctx, duk_idx_t index) {
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (!tv) {
return DUK_TYPE_MASK_NONE;
}
switch (DUK_TVAL_GET_TAG(tv)) {
case DUK_TAG_UNDEFINED:
return DUK_TYPE_MASK_UNDEFINED;
case DUK_TAG_NULL:
return DUK_TYPE_MASK_NULL;
case DUK_TAG_BOOLEAN:
return DUK_TYPE_MASK_BOOLEAN;
case DUK_TAG_STRING:
return DUK_TYPE_MASK_STRING;
case DUK_TAG_OBJECT:
return DUK_TYPE_MASK_OBJECT;
case DUK_TAG_BUFFER:
return DUK_TYPE_MASK_BUFFER;
case DUK_TAG_POINTER:
return DUK_TYPE_MASK_POINTER;
case DUK_TAG_LIGHTFUNC:
return DUK_TYPE_MASK_LIGHTFUNC;
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT:
#endif
default:
/* Note: number has no explicit tag (in 8-byte representation) */
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
return DUK_TYPE_MASK_NUMBER;
}
DUK_UNREACHABLE();
}
DUK_EXTERNAL duk_bool_t duk_check_type_mask(duk_context *ctx, duk_idx_t index, duk_uint_t mask) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT_CTX_VALID(ctx);
if (duk_get_type_mask(ctx, index) & mask) {
return 1;
}
if (mask & DUK_TYPE_MASK_THROW) {
DUK_ERROR_TYPE(thr, DUK_STR_UNEXPECTED_TYPE);
DUK_UNREACHABLE();
}
return 0;
}
DUK_EXTERNAL duk_bool_t duk_is_undefined(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
return duk__tag_check(ctx, index, DUK_TAG_UNDEFINED);
}
DUK_EXTERNAL duk_bool_t duk_is_null(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
return duk__tag_check(ctx, index, DUK_TAG_NULL);
}
DUK_EXTERNAL duk_bool_t duk_is_null_or_undefined(duk_context *ctx, duk_idx_t index) {
duk_tval *tv;
duk_small_uint_t tag;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (!tv) {
return 0;
}
tag = DUK_TVAL_GET_TAG(tv);
return (tag == DUK_TAG_UNDEFINED) || (tag == DUK_TAG_NULL);
}
DUK_EXTERNAL duk_bool_t duk_is_boolean(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
return duk__tag_check(ctx, index, DUK_TAG_BOOLEAN);
}
DUK_EXTERNAL duk_bool_t duk_is_number(duk_context *ctx, duk_idx_t index) {
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
/*
* Number is special because it doesn't have a specific
* tag in the 8-byte representation.
*/
/* XXX: shorter version for 12-byte representation? */
tv = duk_get_tval(ctx, index);
if (!tv) {
return 0;
}
return DUK_TVAL_IS_NUMBER(tv);
}
DUK_EXTERNAL duk_bool_t duk_is_nan(duk_context *ctx, duk_idx_t index) {
/* XXX: This will now return false for non-numbers, even though they would
* coerce to NaN (as a general rule). In particular, duk_get_number()
* returns a NaN for non-numbers, so should this function also return
* true for non-numbers?
*/
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (!tv || !DUK_TVAL_IS_NUMBER(tv)) {
return 0;
}
return DUK_ISNAN(DUK_TVAL_GET_NUMBER(tv));
}
DUK_EXTERNAL duk_bool_t duk_is_string(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
return duk__tag_check(ctx, index, DUK_TAG_STRING);
}
DUK_EXTERNAL duk_bool_t duk_is_object(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
return duk__tag_check(ctx, index, DUK_TAG_OBJECT);
}
DUK_EXTERNAL duk_bool_t duk_is_buffer(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
return duk__tag_check(ctx, index, DUK_TAG_BUFFER);
}
DUK_EXTERNAL duk_bool_t duk_is_pointer(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
return duk__tag_check(ctx, index, DUK_TAG_POINTER);
}
DUK_EXTERNAL duk_bool_t duk_is_lightfunc(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
return duk__tag_check(ctx, index, DUK_TAG_LIGHTFUNC);
}
DUK_EXTERNAL duk_bool_t duk_is_array(duk_context *ctx, duk_idx_t index) {
duk_hobject *obj;
DUK_ASSERT_CTX_VALID(ctx);
obj = duk_get_hobject(ctx, index);
if (obj) {
return (DUK_HOBJECT_GET_CLASS_NUMBER(obj) == DUK_HOBJECT_CLASS_ARRAY ? 1 : 0);
}
return 0;
}
DUK_EXTERNAL duk_bool_t duk_is_function(duk_context *ctx, duk_idx_t index) {
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (tv && DUK_TVAL_IS_LIGHTFUNC(tv)) {
return 1;
}
return duk__obj_flag_any_default_false(ctx,
index,
DUK_HOBJECT_FLAG_COMPILEDFUNCTION |
DUK_HOBJECT_FLAG_NATIVEFUNCTION |
DUK_HOBJECT_FLAG_BOUND);
}
DUK_EXTERNAL duk_bool_t duk_is_c_function(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
return duk__obj_flag_any_default_false(ctx,
index,
DUK_HOBJECT_FLAG_NATIVEFUNCTION);
}
DUK_EXTERNAL duk_bool_t duk_is_ecmascript_function(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
return duk__obj_flag_any_default_false(ctx,
index,
DUK_HOBJECT_FLAG_COMPILEDFUNCTION);
}
DUK_EXTERNAL duk_bool_t duk_is_bound_function(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
return duk__obj_flag_any_default_false(ctx,
index,
DUK_HOBJECT_FLAG_BOUND);
}
DUK_EXTERNAL duk_bool_t duk_is_thread(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
return duk__obj_flag_any_default_false(ctx,
index,
DUK_HOBJECT_FLAG_THREAD);
}
DUK_EXTERNAL duk_bool_t duk_is_fixed_buffer(duk_context *ctx, duk_idx_t index) {
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (tv && DUK_TVAL_IS_BUFFER(tv)) {
duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv);
DUK_ASSERT(h != NULL);
return (DUK_HBUFFER_HAS_DYNAMIC(h) ? 0 : 1);
}
return 0;
}
DUK_EXTERNAL duk_bool_t duk_is_dynamic_buffer(duk_context *ctx, duk_idx_t index) {
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (tv && DUK_TVAL_IS_BUFFER(tv)) {
duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv);
DUK_ASSERT(h != NULL);
return (DUK_HBUFFER_HAS_DYNAMIC(h) && !DUK_HBUFFER_HAS_EXTERNAL(h) ? 1 : 0);
}
return 0;
}
DUK_EXTERNAL duk_bool_t duk_is_external_buffer(duk_context *ctx, duk_idx_t index) {
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
tv = duk_get_tval(ctx, index);
if (tv && DUK_TVAL_IS_BUFFER(tv)) {
duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv);
DUK_ASSERT(h != NULL);
return (DUK_HBUFFER_HAS_DYNAMIC(h) && DUK_HBUFFER_HAS_EXTERNAL(h) ? 1 : 0);
}
return 0;
}
DUK_EXTERNAL duk_errcode_t duk_get_error_code(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h;
duk_uint_t sanity;
DUK_ASSERT_CTX_VALID(ctx);
h = duk_get_hobject(ctx, index);
sanity = DUK_HOBJECT_PROTOTYPE_CHAIN_SANITY;
do {
if (!h) {
return DUK_ERR_NONE;
}
if (h == thr->builtins[DUK_BIDX_EVAL_ERROR_PROTOTYPE]) {
return DUK_ERR_EVAL_ERROR;
}
if (h == thr->builtins[DUK_BIDX_RANGE_ERROR_PROTOTYPE]) {
return DUK_ERR_RANGE_ERROR;
}
if (h == thr->builtins[DUK_BIDX_REFERENCE_ERROR_PROTOTYPE]) {
return DUK_ERR_REFERENCE_ERROR;
}
if (h == thr->builtins[DUK_BIDX_SYNTAX_ERROR_PROTOTYPE]) {
return DUK_ERR_SYNTAX_ERROR;
}
if (h == thr->builtins[DUK_BIDX_TYPE_ERROR_PROTOTYPE]) {
return DUK_ERR_TYPE_ERROR;
}
if (h == thr->builtins[DUK_BIDX_URI_ERROR_PROTOTYPE]) {
return DUK_ERR_URI_ERROR;
}
if (h == thr->builtins[DUK_BIDX_ERROR_PROTOTYPE]) {
return DUK_ERR_ERROR;
}
h = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h);
} while (--sanity > 0);
return DUK_ERR_NONE;
}
/*
* Pushers
*/
DUK_INTERNAL void duk_push_tval(duk_context *ctx, duk_tval *tv) {
duk_hthread *thr;
duk_tval *tv_slot;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(tv != NULL);
thr = (duk_hthread *) ctx;
DUK__CHECK_SPACE();
tv_slot = thr->valstack_top++;
DUK_TVAL_SET_TVAL(tv_slot, tv);
DUK_TVAL_INCREF(thr, tv); /* no side effects */
}
DUK_EXTERNAL void duk_push_undefined(duk_context *ctx) {
duk_hthread *thr;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK__CHECK_SPACE();
/* Because value stack init policy is 'undefined above top',
* we don't need to write, just assert.
*/
thr->valstack_top++;
DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(thr->valstack_top - 1));
}
DUK_EXTERNAL void duk_push_null(duk_context *ctx) {
duk_hthread *thr;
duk_tval *tv_slot;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK__CHECK_SPACE();
tv_slot = thr->valstack_top++;
DUK_TVAL_SET_NULL(tv_slot);
}
DUK_EXTERNAL void duk_push_boolean(duk_context *ctx, duk_bool_t val) {
duk_hthread *thr;
duk_tval *tv_slot;
duk_small_int_t b;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK__CHECK_SPACE();
b = (val ? 1 : 0); /* ensure value is 1 or 0 (not other non-zero) */
tv_slot = thr->valstack_top++;
DUK_TVAL_SET_BOOLEAN(tv_slot, b);
}
DUK_EXTERNAL void duk_push_true(duk_context *ctx) {
duk_hthread *thr;
duk_tval *tv_slot;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK__CHECK_SPACE();
tv_slot = thr->valstack_top++;
DUK_TVAL_SET_BOOLEAN_TRUE(tv_slot);
}
DUK_EXTERNAL void duk_push_false(duk_context *ctx) {
duk_hthread *thr;
duk_tval *tv_slot;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK__CHECK_SPACE();
tv_slot = thr->valstack_top++;
DUK_TVAL_SET_BOOLEAN_FALSE(tv_slot);
}
/* normalize NaN which may not match our canonical internal NaN */
DUK_EXTERNAL void duk_push_number(duk_context *ctx, duk_double_t val) {
duk_hthread *thr;
duk_tval *tv_slot;
duk_double_union du;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK__CHECK_SPACE();
du.d = val;
DUK_DBLUNION_NORMALIZE_NAN_CHECK(&du);
tv_slot = thr->valstack_top++;
DUK_TVAL_SET_NUMBER(tv_slot, du.d);
}
DUK_EXTERNAL void duk_push_int(duk_context *ctx, duk_int_t val) {
#if defined(DUK_USE_FASTINT)
duk_hthread *thr;
duk_tval *tv_slot;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK__CHECK_SPACE();
tv_slot = thr->valstack_top++;
#if DUK_INT_MAX <= 0x7fffffffL
DUK_TVAL_SET_FASTINT_I32(tv_slot, (duk_int32_t) val);
#else
if (val >= DUK_FASTINT_MIN && val <= DUK_FASTINT_MAX) {
DUK_TVAL_SET_FASTINT(tv_slot, (duk_int64_t) val);
} else {
duk_double_t = (duk_double_t) val;
DUK_TVAL_SET_NUMBER(tv_slot, d);
}
#endif
#else /* DUK_USE_FASTINT */
duk_hthread *thr;
duk_tval *tv_slot;
duk_double_t d;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK__CHECK_SPACE();
d = (duk_double_t) val;
tv_slot = thr->valstack_top++;
DUK_TVAL_SET_NUMBER(tv_slot, d);
#endif /* DUK_USE_FASTINT */
}
DUK_EXTERNAL void duk_push_uint(duk_context *ctx, duk_uint_t val) {
#if defined(DUK_USE_FASTINT)
duk_hthread *thr;
duk_tval *tv_slot;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK__CHECK_SPACE();
tv_slot = thr->valstack_top++;
#if DUK_UINT_MAX <= 0xffffffffUL
DUK_TVAL_SET_FASTINT_U32(tv_slot, (duk_uint32_t) val);
#else
if (val <= DUK_FASTINT_MAX) { /* val is unsigned so >= 0 */
/* XXX: take advantage of val being unsigned, no need to mask */
DUK_TVAL_SET_FASTINT(tv_slot, (duk_int64_t) val);
} else {
duk_double_t = (duk_double_t) val;
DUK_TVAL_SET_NUMBER(tv_slot, d);
}
#endif
#else /* DUK_USE_FASTINT */
duk_hthread *thr;
duk_tval *tv_slot;
duk_double_t d;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK__CHECK_SPACE();
d = (duk_double_t) val;
tv_slot = thr->valstack_top++;
DUK_TVAL_SET_NUMBER(tv_slot, d);
#endif /* DUK_USE_FASTINT */
}
DUK_EXTERNAL void duk_push_nan(duk_context *ctx) {
duk_hthread *thr;
duk_tval *tv_slot;
duk_double_union du;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK__CHECK_SPACE();
DUK_DBLUNION_SET_NAN(&du);
DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&du));
tv_slot = thr->valstack_top++;
DUK_TVAL_SET_NUMBER(tv_slot, du.d);
}
DUK_EXTERNAL const char *duk_push_lstring(duk_context *ctx, const char *str, duk_size_t len) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hstring *h;
duk_tval *tv_slot;
DUK_ASSERT_CTX_VALID(ctx);
/* check stack before interning (avoid hanging temp) */
if (thr->valstack_top >= thr->valstack_end) {
DUK_ERROR_API(thr, DUK_STR_PUSH_BEYOND_ALLOC_STACK);
}
/* NULL with zero length represents an empty string; NULL with higher
* length is also now trated like an empty string although it is
* a bit dubious. This is unlike duk_push_string() which pushes a
* 'null' if the input string is a NULL.
*/
if (!str) {
len = 0;
}
/* Check for maximum string length */
if (len > DUK_HSTRING_MAX_BYTELEN) {
DUK_ERROR_RANGE(thr, DUK_STR_STRING_TOO_LONG);
}
h = duk_heap_string_intern_checked(thr, (const duk_uint8_t *) str, (duk_uint32_t) len);
DUK_ASSERT(h != NULL);
tv_slot = thr->valstack_top++;
DUK_TVAL_SET_STRING(tv_slot, h);
DUK_HSTRING_INCREF(thr, h); /* no side effects */
return (const char *) DUK_HSTRING_GET_DATA(h);
}
DUK_EXTERNAL const char *duk_push_string(duk_context *ctx, const char *str) {
DUK_ASSERT_CTX_VALID(ctx);
if (str) {
return duk_push_lstring(ctx, str, DUK_STRLEN(str));
} else {
duk_push_null(ctx);
return NULL;
}
}
#ifdef DUK_USE_FILE_IO
/* This is a bit clunky because it is ANSI C portable. Should perhaps
* relocate to another file because this is potentially platform
* dependent.
*/
DUK_EXTERNAL const char *duk_push_string_file_raw(duk_context *ctx, const char *path, duk_uint_t flags) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_file *f = NULL;
char *buf;
long sz; /* ANSI C typing */
DUK_ASSERT_CTX_VALID(ctx);
if (!path) {
goto fail;
}
f = DUK_FOPEN(path, "rb");
if (!f) {
goto fail;
}
if (DUK_FSEEK(f, 0, SEEK_END) < 0) {
goto fail;
}
sz = DUK_FTELL(f);
if (sz < 0) {
goto fail;
}
if (DUK_FSEEK(f, 0, SEEK_SET) < 0) {
goto fail;
}
buf = (char *) duk_push_fixed_buffer(ctx, (duk_size_t) sz);
DUK_ASSERT(buf != NULL);
if ((duk_size_t) DUK_FREAD(buf, 1, (size_t) sz, f) != (duk_size_t) sz) {
goto fail;
}
(void) DUK_FCLOSE(f); /* ignore fclose() error */
f = NULL;
return duk_to_string(ctx, -1);
fail:
if (f) {
DUK_FCLOSE(f);
}
if (flags != 0) {
DUK_ASSERT(flags == DUK_STRING_PUSH_SAFE); /* only flag now */
duk_push_undefined(ctx);
} else {
/* XXX: string not shared because it is conditional */
DUK_ERROR_TYPE(thr, "read file error");
}
return NULL;
}
#else
DUK_EXTERNAL const char *duk_push_string_file_raw(duk_context *ctx, const char *path, duk_uint_t flags) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT_CTX_VALID(ctx);
DUK_UNREF(path);
if (flags != 0) {
DUK_ASSERT(flags == DUK_STRING_PUSH_SAFE); /* only flag now */
duk_push_undefined(ctx);
} else {
/* XXX: string not shared because it is conditional */
DUK_ERROR_UNSUPPORTED(thr, "file I/O disabled");
}
return NULL;
}
#endif /* DUK_USE_FILE_IO */
DUK_EXTERNAL void duk_push_pointer(duk_context *ctx, void *val) {
duk_hthread *thr;
duk_tval *tv_slot;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK__CHECK_SPACE();
tv_slot = thr->valstack_top++;
DUK_TVAL_SET_POINTER(tv_slot, val);
}
DUK_LOCAL void duk__push_this_helper(duk_context *ctx, duk_small_uint_t check_object_coercible) {
duk_hthread *thr;
duk_tval *tv_slot;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT_DISABLE(thr->callstack_top >= 0); /* avoid warning (unsigned) */
thr = (duk_hthread *) ctx;
DUK_ASSERT(thr->callstack_top <= thr->callstack_size);
DUK__CHECK_SPACE();
DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(thr->valstack_top)); /* because of valstack init policy */
tv_slot = thr->valstack_top++;
if (DUK_UNLIKELY(thr->callstack_top == 0)) {
if (check_object_coercible) {
goto type_error;
}
/* 'undefined' already on stack top */
} else {
duk_tval *tv;
/* 'this' binding is just before current activation's bottom */
DUK_ASSERT(thr->valstack_bottom > thr->valstack);
tv = thr->valstack_bottom - 1;
if (check_object_coercible &&
(DUK_TVAL_IS_UNDEFINED(tv) || DUK_TVAL_IS_NULL(tv))) {
/* XXX: better macro for DUK_TVAL_IS_UNDEFINED_OR_NULL(tv) */
goto type_error;
}
DUK_TVAL_SET_TVAL(tv_slot, tv);
DUK_TVAL_INCREF(thr, tv);
}
return;
type_error:
DUK_ERROR_TYPE(thr, DUK_STR_NOT_OBJECT_COERCIBLE);
}
DUK_EXTERNAL void duk_push_this(duk_context *ctx) {
DUK_ASSERT_CTX_VALID(ctx);
duk__push_this_helper(ctx, 0 /*check_object_coercible*/);
}
DUK_INTERNAL void duk_push_this_check_object_coercible(duk_context *ctx) {
DUK_ASSERT_CTX_VALID(ctx);
duk__push_this_helper(ctx, 1 /*check_object_coercible*/);
}
DUK_INTERNAL duk_hobject *duk_push_this_coercible_to_object(duk_context *ctx) {
duk_hobject *h;
DUK_ASSERT_CTX_VALID(ctx);
duk__push_this_helper(ctx, 1 /*check_object_coercible*/);
duk_to_object(ctx, -1);
h = duk_get_hobject(ctx, -1);
DUK_ASSERT(h != NULL);
return h;
}
DUK_INTERNAL duk_hstring *duk_push_this_coercible_to_string(duk_context *ctx) {
duk_hstring *h;
DUK_ASSERT_CTX_VALID(ctx);
duk__push_this_helper(ctx, 1 /*check_object_coercible*/);
duk_to_string(ctx, -1);
h = duk_get_hstring(ctx, -1);
DUK_ASSERT(h != NULL);
return h;
}
DUK_INTERNAL duk_tval *duk_get_borrowed_this_tval(duk_context *ctx) {
duk_hthread *thr;
DUK_ASSERT(ctx != NULL);
thr = (duk_hthread *) ctx;
DUK_ASSERT(thr->callstack_top > 0); /* caller required to know */
DUK_ASSERT(thr->valstack_bottom > thr->valstack); /* consequence of above */
DUK_ASSERT(thr->valstack_bottom - 1 >= thr->valstack); /* 'this' binding exists */
return thr->valstack_bottom - 1;
}
DUK_EXTERNAL void duk_push_current_function(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_activation *act;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr != NULL);
DUK_ASSERT_DISABLE(thr->callstack_top >= 0);
DUK_ASSERT(thr->callstack_top <= thr->callstack_size);
act = duk_hthread_get_current_activation(thr);
if (act) {
duk_push_tval(ctx, &act->tv_func);
} else {
duk_push_undefined(ctx);
}
}
DUK_EXTERNAL void duk_push_current_thread(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr != NULL);
if (thr->heap->curr_thread) {
duk_push_hobject(ctx, (duk_hobject *) thr->heap->curr_thread);
} else {
duk_push_undefined(ctx);
}
}
DUK_EXTERNAL void duk_push_global_object(duk_context *ctx) {
DUK_ASSERT_CTX_VALID(ctx);
duk_push_hobject_bidx(ctx, DUK_BIDX_GLOBAL);
}
/* XXX: size optimize */
DUK_LOCAL void duk__push_stash(duk_context *ctx) {
DUK_ASSERT_CTX_VALID(ctx);
if (!duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_VALUE)) {
DUK_DDD(DUK_DDDPRINT("creating heap/global/thread stash on first use"));
duk_pop(ctx);
duk_push_object_internal(ctx);
duk_dup_top(ctx);
duk_xdef_prop_stridx(ctx, -3, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_C); /* [ ... parent stash stash ] -> [ ... parent stash ] */
}
duk_remove(ctx, -2);
}
DUK_EXTERNAL void duk_push_heap_stash(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_heap *heap;
DUK_ASSERT_CTX_VALID(ctx);
heap = thr->heap;
DUK_ASSERT(heap->heap_object != NULL);
duk_push_hobject(ctx, heap->heap_object);
duk__push_stash(ctx);
}
DUK_EXTERNAL void duk_push_global_stash(duk_context *ctx) {
DUK_ASSERT_CTX_VALID(ctx);
duk_push_global_object(ctx);
duk__push_stash(ctx);
}
DUK_EXTERNAL void duk_push_thread_stash(duk_context *ctx, duk_context *target_ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT_CTX_VALID(ctx);
if (!target_ctx) {
DUK_ERROR_API(thr, DUK_STR_INVALID_CALL_ARGS);
return; /* not reached */
}
duk_push_hobject(ctx, (duk_hobject *) target_ctx);
duk__push_stash(ctx);
}
/* XXX: duk_ssize_t would be useful here */
DUK_LOCAL duk_int_t duk__try_push_vsprintf(duk_context *ctx, void *buf, duk_size_t sz, const char *fmt, va_list ap) {
duk_int_t len;
DUK_ASSERT_CTX_VALID(ctx);
DUK_UNREF(ctx);
/* NUL terminator handling doesn't matter here */
len = DUK_VSNPRINTF((char *) buf, sz, fmt, ap);
if (len < (duk_int_t) sz) {
/* Return value of 'sz' or more indicates output was (potentially)
* truncated.
*/
return (duk_int_t) len;
}
return -1;
}
DUK_EXTERNAL const char *duk_push_vsprintf(duk_context *ctx, const char *fmt, va_list ap) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_uint8_t stack_buf[DUK_PUSH_SPRINTF_INITIAL_SIZE];
duk_size_t sz = DUK_PUSH_SPRINTF_INITIAL_SIZE;
duk_bool_t pushed_buf = 0;
void *buf;
duk_int_t len; /* XXX: duk_ssize_t */
const char *res;
DUK_ASSERT_CTX_VALID(ctx);
/* special handling of fmt==NULL */
if (!fmt) {
duk_hstring *h_str;
duk_push_hstring_stridx(ctx, DUK_STRIDX_EMPTY_STRING);
h_str = DUK_HTHREAD_STRING_EMPTY_STRING(thr); /* rely on interning, must be this string */
return (const char *) DUK_HSTRING_GET_DATA(h_str);
}
/* initial estimate based on format string */
sz = DUK_STRLEN(fmt) + 16; /* format plus something to avoid just missing */
if (sz < DUK_PUSH_SPRINTF_INITIAL_SIZE) {
sz = DUK_PUSH_SPRINTF_INITIAL_SIZE;
}
DUK_ASSERT(sz > 0);
/* Try to make do with a stack buffer to avoid allocating a temporary buffer.
* This works 99% of the time which is quite nice.
*/
for (;;) {
va_list ap_copy; /* copied so that 'ap' can be reused */
if (sz <= sizeof(stack_buf)) {
buf = stack_buf;
} else if (!pushed_buf) {
pushed_buf = 1;
buf = duk_push_dynamic_buffer(ctx, sz);
} else {
buf = duk_resize_buffer(ctx, -1, sz);
}
DUK_ASSERT(buf != NULL);
DUK_VA_COPY(ap_copy, ap);
len = duk__try_push_vsprintf(ctx, buf, sz, fmt, ap_copy);
va_end(ap_copy);
if (len >= 0) {
break;
}
/* failed, resize and try again */
sz = sz * 2;
if (sz >= DUK_PUSH_SPRINTF_SANITY_LIMIT) {
DUK_ERROR_API(thr, DUK_STR_SPRINTF_TOO_LONG);
}
}
/* Cannot use duk_to_string() on the buffer because it is usually
* larger than 'len'. Also, 'buf' is usually a stack buffer.
*/
res = duk_push_lstring(ctx, (const char *) buf, (duk_size_t) len); /* [ buf? res ] */
if (pushed_buf) {
duk_remove(ctx, -2);
}
return res;
}
DUK_EXTERNAL const char *duk_push_sprintf(duk_context *ctx, const char *fmt, ...) {
va_list ap;
const char *ret;
DUK_ASSERT_CTX_VALID(ctx);
/* allow fmt==NULL */
va_start(ap, fmt);
ret = duk_push_vsprintf(ctx, fmt, ap);
va_end(ap);
return ret;
}
DUK_INTERNAL duk_idx_t duk_push_object_helper(duk_context *ctx, duk_uint_t hobject_flags_and_class, duk_small_int_t prototype_bidx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv_slot;
duk_hobject *h;
duk_idx_t ret;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(prototype_bidx == -1 ||
(prototype_bidx >= 0 && prototype_bidx < DUK_NUM_BUILTINS));
/* check stack first */
if (thr->valstack_top >= thr->valstack_end) {
DUK_ERROR_API(thr, DUK_STR_PUSH_BEYOND_ALLOC_STACK);
}
h = duk_hobject_alloc(thr->heap, hobject_flags_and_class);
if (!h) {
DUK_ERROR_ALLOC_DEFMSG(thr);
}
DUK_DDD(DUK_DDDPRINT("created object with flags: 0x%08lx", (unsigned long) h->hdr.h_flags));
tv_slot = thr->valstack_top;
DUK_TVAL_SET_OBJECT(tv_slot, h);
DUK_HOBJECT_INCREF(thr, h); /* no side effects */
ret = (duk_idx_t) (thr->valstack_top - thr->valstack_bottom);
thr->valstack_top++;
/* object is now reachable */
if (prototype_bidx >= 0) {
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, h, thr->builtins[prototype_bidx]);
} else {
DUK_ASSERT(prototype_bidx == -1);
DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h) == NULL);
}
return ret;
}
DUK_INTERNAL duk_idx_t duk_push_object_helper_proto(duk_context *ctx, duk_uint_t hobject_flags_and_class, duk_hobject *proto) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_idx_t ret;
duk_hobject *h;
DUK_ASSERT_CTX_VALID(ctx);
ret = duk_push_object_helper(ctx, hobject_flags_and_class, -1);
h = duk_get_hobject(ctx, -1);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h) == NULL);
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, h, proto);
return ret;
}
DUK_EXTERNAL duk_idx_t duk_push_object(duk_context *ctx) {
DUK_ASSERT_CTX_VALID(ctx);
return duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT),
DUK_BIDX_OBJECT_PROTOTYPE);
}
DUK_EXTERNAL duk_idx_t duk_push_array(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *obj;
duk_idx_t ret;
DUK_ASSERT_CTX_VALID(ctx);
ret = duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_ARRAY_PART |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_ARRAY),
DUK_BIDX_ARRAY_PROTOTYPE);
obj = duk_require_hobject(ctx, ret);
/*
* An array must have a 'length' property (E5 Section 15.4.5.2).
* The special array behavior flag must only be enabled once the
* length property has been added.
*
* The internal property must be a number (and preferably a
* fastint if fastint support is enabled).
*/
duk_push_int(ctx, 0);
#if defined(DUK_USE_FASTINT)
DUK_ASSERT(DUK_TVAL_IS_FASTINT(duk_require_tval(ctx, -1)));
#endif
duk_hobject_define_property_internal(thr,
obj,
DUK_HTHREAD_STRING_LENGTH(thr),
DUK_PROPDESC_FLAGS_W);
DUK_HOBJECT_SET_EXOTIC_ARRAY(obj);
return ret;
}
DUK_EXTERNAL duk_idx_t duk_push_thread_raw(duk_context *ctx, duk_uint_t flags) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hthread *obj;
duk_idx_t ret;
duk_tval *tv_slot;
DUK_ASSERT_CTX_VALID(ctx);
/* check stack first */
if (thr->valstack_top >= thr->valstack_end) {
DUK_ERROR_API(thr, DUK_STR_PUSH_BEYOND_ALLOC_STACK);
}
obj = duk_hthread_alloc(thr->heap,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_THREAD |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_THREAD));
if (!obj) {
DUK_ERROR_ALLOC_DEFMSG(thr);
}
obj->state = DUK_HTHREAD_STATE_INACTIVE;
#if defined(DUK_USE_ROM_STRINGS)
/* Nothing to initialize, strs[] is in ROM. */
#else
#if defined(DUK_USE_HEAPPTR16)
obj->strs16 = thr->strs16;
#else
obj->strs = thr->strs;
#endif
#endif
DUK_DDD(DUK_DDDPRINT("created thread object with flags: 0x%08lx", (unsigned long) obj->obj.hdr.h_flags));
/* make the new thread reachable */
tv_slot = thr->valstack_top;
DUK_TVAL_SET_OBJECT(tv_slot, (duk_hobject *) obj);
DUK_HTHREAD_INCREF(thr, obj);
ret = (duk_idx_t) (thr->valstack_top - thr->valstack_bottom);
thr->valstack_top++;
/* important to do this *after* pushing, to make the thread reachable for gc */
if (!duk_hthread_init_stacks(thr->heap, obj)) {
DUK_ERROR_ALLOC_DEFMSG(thr);
}
/* initialize built-ins - either by copying or creating new ones */
if (flags & DUK_THREAD_NEW_GLOBAL_ENV) {
duk_hthread_create_builtin_objects(obj);
} else {
duk_hthread_copy_builtin_objects(thr, obj);
}
/* default prototype (Note: 'obj' must be reachable) */
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, (duk_hobject *) obj, obj->builtins[DUK_BIDX_THREAD_PROTOTYPE]);
/* Initial stack size satisfies the stack spare constraints so there
* is no need to require stack here.
*/
DUK_ASSERT(DUK_VALSTACK_INITIAL_SIZE >=
DUK_VALSTACK_API_ENTRY_MINIMUM + DUK_VALSTACK_INTERNAL_EXTRA);
return ret;
}
DUK_INTERNAL duk_idx_t duk_push_compiledfunction(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hcompiledfunction *obj;
duk_idx_t ret;
duk_tval *tv_slot;
DUK_ASSERT_CTX_VALID(ctx);
/* check stack first */
if (thr->valstack_top >= thr->valstack_end) {
DUK_ERROR_API(thr, DUK_STR_PUSH_BEYOND_ALLOC_STACK);
}
/* Template functions are not strictly constructable (they don't
* have a "prototype" property for instance), so leave the
* DUK_HOBJECT_FLAG_CONSRUCTABLE flag cleared here.
*/
obj = duk_hcompiledfunction_alloc(thr->heap,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_COMPILEDFUNCTION |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_FUNCTION));
if (!obj) {
DUK_ERROR_ALLOC_DEFMSG(thr);
}
DUK_DDD(DUK_DDDPRINT("created compiled function object with flags: 0x%08lx", (unsigned long) obj->obj.hdr.h_flags));
tv_slot = thr->valstack_top;
DUK_TVAL_SET_OBJECT(tv_slot, (duk_hobject *) obj);
DUK_HOBJECT_INCREF(thr, obj);
ret = (duk_idx_t) (thr->valstack_top - thr->valstack_bottom);
thr->valstack_top++;
/* default prototype (Note: 'obj' must be reachable) */
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, (duk_hobject *) obj, thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]);
return ret;
}
DUK_LOCAL duk_idx_t duk__push_c_function_raw(duk_context *ctx, duk_c_function func, duk_idx_t nargs, duk_uint_t flags) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hnativefunction *obj;
duk_idx_t ret;
duk_tval *tv_slot;
duk_int16_t func_nargs;
DUK_ASSERT_CTX_VALID(ctx);
/* check stack first */
if (thr->valstack_top >= thr->valstack_end) {
DUK_ERROR_API(thr, DUK_STR_PUSH_BEYOND_ALLOC_STACK);
}
if (func == NULL) {
goto api_error;
}
if (nargs >= 0 && nargs < DUK_HNATIVEFUNCTION_NARGS_MAX) {
func_nargs = (duk_int16_t) nargs;
} else if (nargs == DUK_VARARGS) {
func_nargs = DUK_HNATIVEFUNCTION_NARGS_VARARGS;
} else {
goto api_error;
}
obj = duk_hnativefunction_alloc(thr->heap, flags);
if (!obj) {
DUK_ERROR_ALLOC_DEFMSG(thr);
}
obj->func = func;
obj->nargs = func_nargs;
DUK_DDD(DUK_DDDPRINT("created native function object with flags: 0x%08lx, nargs=%ld",
(unsigned long) obj->obj.hdr.h_flags, (long) obj->nargs));
tv_slot = thr->valstack_top;
DUK_TVAL_SET_OBJECT(tv_slot, (duk_hobject *) obj);
DUK_HOBJECT_INCREF(thr, obj);
ret = (duk_idx_t) (thr->valstack_top - thr->valstack_bottom);
thr->valstack_top++;
/* default prototype (Note: 'obj' must be reachable) */
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, (duk_hobject *) obj, thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]);
return ret;
api_error:
DUK_ERROR_API(thr, DUK_STR_INVALID_CALL_ARGS);
return 0; /* not reached */
}
DUK_EXTERNAL duk_idx_t duk_push_c_function(duk_context *ctx, duk_c_function func, duk_int_t nargs) {
duk_uint_t flags;
DUK_ASSERT_CTX_VALID(ctx);
flags = DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_CONSTRUCTABLE |
DUK_HOBJECT_FLAG_NATIVEFUNCTION |
DUK_HOBJECT_FLAG_NEWENV |
DUK_HOBJECT_FLAG_STRICT |
DUK_HOBJECT_FLAG_NOTAIL |
DUK_HOBJECT_FLAG_EXOTIC_DUKFUNC |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_FUNCTION);
return duk__push_c_function_raw(ctx, func, nargs, flags);
}
DUK_INTERNAL void duk_push_c_function_noexotic(duk_context *ctx, duk_c_function func, duk_int_t nargs) {
duk_uint_t flags;
DUK_ASSERT_CTX_VALID(ctx);
flags = DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_CONSTRUCTABLE |
DUK_HOBJECT_FLAG_NATIVEFUNCTION |
DUK_HOBJECT_FLAG_NEWENV |
DUK_HOBJECT_FLAG_STRICT |
DUK_HOBJECT_FLAG_NOTAIL |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_FUNCTION);
(void) duk__push_c_function_raw(ctx, func, nargs, flags);
}
DUK_INTERNAL void duk_push_c_function_noconstruct_noexotic(duk_context *ctx, duk_c_function func, duk_int_t nargs) {
duk_uint_t flags;
DUK_ASSERT_CTX_VALID(ctx);
flags = DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_NATIVEFUNCTION |
DUK_HOBJECT_FLAG_NEWENV |
DUK_HOBJECT_FLAG_STRICT |
DUK_HOBJECT_FLAG_NOTAIL |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_FUNCTION);
(void) duk__push_c_function_raw(ctx, func, nargs, flags);
}
DUK_EXTERNAL duk_idx_t duk_push_c_lightfunc(duk_context *ctx, duk_c_function func, duk_idx_t nargs, duk_idx_t length, duk_int_t magic) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval tv_tmp;
duk_small_uint_t lf_flags;
DUK_ASSERT_CTX_VALID(ctx);
/* check stack first */
if (thr->valstack_top >= thr->valstack_end) {
DUK_ERROR_API(thr, DUK_STR_PUSH_BEYOND_ALLOC_STACK);
}
if (nargs >= DUK_LFUNC_NARGS_MIN && nargs <= DUK_LFUNC_NARGS_MAX) {
/* as is */
} else if (nargs == DUK_VARARGS) {
nargs = DUK_LFUNC_NARGS_VARARGS;
} else {
goto api_error;
}
if (!(length >= DUK_LFUNC_LENGTH_MIN && length <= DUK_LFUNC_LENGTH_MAX)) {
goto api_error;
}
if (!(magic >= DUK_LFUNC_MAGIC_MIN && magic <= DUK_LFUNC_MAGIC_MAX)) {
goto api_error;
}
lf_flags = DUK_LFUNC_FLAGS_PACK(magic, length, nargs);
DUK_TVAL_SET_LIGHTFUNC(&tv_tmp, func, lf_flags);
duk_push_tval(ctx, &tv_tmp); /* XXX: direct valstack write */
DUK_ASSERT(thr->valstack_top != thr->valstack_bottom);
return ((duk_idx_t) (thr->valstack_top - thr->valstack_bottom)) - 1;
api_error:
DUK_ERROR_API(thr, DUK_STR_INVALID_CALL_ARGS);
return 0; /* not reached */
}
DUK_INTERNAL duk_hbufferobject *duk_push_bufferobject_raw(duk_context *ctx, duk_uint_t hobject_flags_and_class, duk_small_int_t prototype_bidx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hbufferobject *obj;
duk_tval *tv_slot;
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(prototype_bidx >= 0);
/* check stack first */
if (thr->valstack_top >= thr->valstack_end) {
DUK_ERROR_API(thr, DUK_STR_PUSH_BEYOND_ALLOC_STACK);
}
obj = duk_hbufferobject_alloc(thr->heap, hobject_flags_and_class);
if (!obj) {
DUK_ERROR_ALLOC_DEFMSG(thr);
}
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, (duk_hobject *) obj, thr->builtins[prototype_bidx]);
DUK_ASSERT_HBUFFEROBJECT_VALID(obj);
tv_slot = thr->valstack_top;
DUK_TVAL_SET_OBJECT(tv_slot, (duk_hobject *) obj);
DUK_HOBJECT_INCREF(thr, obj);
thr->valstack_top++;
return obj;
}
/* XXX: There's quite a bit of overlap with buffer creation handling in
* duk_bi_buffer.c. Look for overlap and refactor.
*/
#define DUK__PACK_ARGS(classnum,protobidx,elemtype,elemshift,isview) \
(((classnum) << 24) | ((protobidx) << 16) | ((elemtype) << 8) | ((elemshift) << 4) | (isview))
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
static const duk_uint32_t duk__bufobj_flags_lookup[] = {
DUK__PACK_ARGS(DUK_HOBJECT_CLASS_BUFFER, DUK_BIDX_BUFFER_PROTOTYPE, DUK_HBUFFEROBJECT_ELEM_UINT8, 0, 0), /* DUK_BUFOBJ_DUKTAPE_BUFFER */
DUK__PACK_ARGS(DUK_HOBJECT_CLASS_BUFFER, DUK_BIDX_NODEJS_BUFFER_PROTOTYPE, DUK_HBUFFEROBJECT_ELEM_UINT8, 0, 0), /* DUK_BUFOBJ_NODEJS_BUFFER */
DUK__PACK_ARGS(DUK_HOBJECT_CLASS_ARRAYBUFFER, DUK_BIDX_ARRAYBUFFER_PROTOTYPE, DUK_HBUFFEROBJECT_ELEM_UINT8, 0, 0), /* DUK_BUFOBJ_ARRAYBUFFER */
DUK__PACK_ARGS(DUK_HOBJECT_CLASS_DATAVIEW, DUK_BIDX_DATAVIEW_PROTOTYPE, DUK_HBUFFEROBJECT_ELEM_UINT8, 0, 1), /* DUK_BUFOBJ_DATAVIEW */
DUK__PACK_ARGS(DUK_HOBJECT_CLASS_INT8ARRAY, DUK_BIDX_INT8ARRAY_PROTOTYPE, DUK_HBUFFEROBJECT_ELEM_INT8, 0, 1), /* DUK_BUFOBJ_INT8ARRAY */
DUK__PACK_ARGS(DUK_HOBJECT_CLASS_UINT8ARRAY, DUK_BIDX_UINT8ARRAY_PROTOTYPE, DUK_HBUFFEROBJECT_ELEM_UINT8, 0, 1), /* DUK_BUFOBJ_UINT8ARRAY */
DUK__PACK_ARGS(DUK_HOBJECT_CLASS_UINT8CLAMPEDARRAY, DUK_BIDX_UINT8CLAMPEDARRAY_PROTOTYPE, DUK_HBUFFEROBJECT_ELEM_UINT8CLAMPED, 0, 1), /* DUK_BUFOBJ_UINT8CLAMPEDARRAY */
DUK__PACK_ARGS(DUK_HOBJECT_CLASS_INT16ARRAY, DUK_BIDX_INT16ARRAY_PROTOTYPE, DUK_HBUFFEROBJECT_ELEM_INT16, 1, 1), /* DUK_BUFOBJ_INT16ARRAY */
DUK__PACK_ARGS(DUK_HOBJECT_CLASS_UINT16ARRAY, DUK_BIDX_UINT16ARRAY_PROTOTYPE, DUK_HBUFFEROBJECT_ELEM_UINT16, 1, 1), /* DUK_BUFOBJ_UINT16ARRAY */
DUK__PACK_ARGS(DUK_HOBJECT_CLASS_INT32ARRAY, DUK_BIDX_INT32ARRAY_PROTOTYPE, DUK_HBUFFEROBJECT_ELEM_INT32, 2, 1), /* DUK_BUFOBJ_INT32ARRAY */
DUK__PACK_ARGS(DUK_HOBJECT_CLASS_UINT32ARRAY, DUK_BIDX_UINT32ARRAY_PROTOTYPE, DUK_HBUFFEROBJECT_ELEM_UINT32, 2, 1), /* DUK_BUFOBJ_UINT32ARRAY */
DUK__PACK_ARGS(DUK_HOBJECT_CLASS_FLOAT32ARRAY, DUK_BIDX_FLOAT32ARRAY_PROTOTYPE, DUK_HBUFFEROBJECT_ELEM_FLOAT32, 2, 1), /* DUK_BUFOBJ_FLOAT32ARRAY */
DUK__PACK_ARGS(DUK_HOBJECT_CLASS_FLOAT64ARRAY, DUK_BIDX_FLOAT64ARRAY_PROTOTYPE, DUK_HBUFFEROBJECT_ELEM_FLOAT64, 3, 1) /* DUK_BUFOBJ_FLOAT64ARRAY */
};
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
/* Only allow Duktape.Buffer when support disabled. */
static const duk_uint32_t duk__bufobj_flags_lookup[] = {
DUK__PACK_ARGS(DUK_HOBJECT_CLASS_BUFFER, DUK_BIDX_BUFFER_PROTOTYPE, DUK_HBUFFEROBJECT_ELEM_UINT8, 0, 0) /* DUK_BUFOBJ_DUKTAPE_BUFFER */
};
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
#undef DUK__PACK_ARGS
DUK_EXTERNAL void duk_push_buffer_object(duk_context *ctx, duk_idx_t idx_buffer, duk_size_t byte_offset, duk_size_t byte_length, duk_uint_t flags) {
duk_hthread *thr;
duk_hbufferobject *h_bufobj;
duk_hbuffer *h_val;
duk_uint32_t tmp;
duk_uint_t classnum;
duk_uint_t protobidx;
duk_uint_t lookupidx;
duk_uint_t uint_offset, uint_length, uint_added;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
/* The underlying types for offset/length in duk_hbufferobject is
* duk_uint_t; make sure argument values fit and that offset + length
* does not wrap.
*/
uint_offset = (duk_uint_t) byte_offset;
uint_length = (duk_uint_t) byte_length;
if (sizeof(duk_size_t) != sizeof(duk_uint_t)) {
if ((duk_size_t) uint_offset != byte_offset || (duk_size_t) uint_length != byte_length) {
goto range_error;
}
}
uint_added = uint_offset + uint_length;
if (uint_added < uint_offset) {
goto range_error;
}
DUK_ASSERT(uint_added >= uint_offset && uint_added >= uint_length);
DUK_ASSERT_DISABLE(flags >= 0); /* flags is unsigned */
lookupidx = flags & 0x0f; /* 4 low bits */
if (lookupidx >= sizeof(duk__bufobj_flags_lookup) / sizeof(duk_uint32_t)) {
goto arg_error;
}
tmp = duk__bufobj_flags_lookup[lookupidx];
classnum = tmp >> 24;
protobidx = (tmp >> 16) & 0xff;
h_val = duk_require_hbuffer(ctx, idx_buffer);
DUK_ASSERT(h_val != NULL);
h_bufobj = duk_push_bufferobject_raw(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_BUFFEROBJECT |
DUK_HOBJECT_CLASS_AS_FLAGS(classnum),
protobidx);
DUK_ASSERT(h_bufobj != NULL);
h_bufobj->buf = h_val;
DUK_HBUFFER_INCREF(thr, h_val);
h_bufobj->offset = uint_offset;
h_bufobj->length = uint_length;
h_bufobj->shift = (tmp >> 4) & 0x0f;
h_bufobj->elem_type = (tmp >> 8) & 0xff;
h_bufobj->is_view = tmp & 0x0f;
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
/* TypedArray views need an automatic ArrayBuffer which must be
* provided as .buffer property of the view. Just create a new
* ArrayBuffer sharing the same underlying buffer.
*/
if (flags & DUK_BUFOBJ_CREATE_ARRBUF) {
h_bufobj = duk_push_bufferobject_raw(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_BUFFEROBJECT |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_ARRAYBUFFER),
DUK_BIDX_ARRAYBUFFER_PROTOTYPE);
DUK_ASSERT(h_bufobj != NULL);
h_bufobj->buf = h_val;
DUK_HBUFFER_INCREF(thr, h_val);
h_bufobj->offset = uint_offset;
h_bufobj->length = uint_length;
DUK_ASSERT(h_bufobj->shift == 0);
h_bufobj->elem_type = DUK_HBUFFEROBJECT_ELEM_UINT8;
DUK_ASSERT(h_bufobj->is_view == 0);
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_LC_BUFFER, DUK_PROPDESC_FLAGS_NONE);
duk_compact(ctx, -1);
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
return;
range_error:
DUK_ERROR_RANGE(thr, DUK_STR_INVALID_CALL_ARGS);
return; /* not reached */
arg_error:
DUK_ERROR_TYPE(thr, DUK_STR_INVALID_CALL_ARGS);
return; /* not reached */
}
DUK_EXTERNAL duk_idx_t duk_push_error_object_va_raw(duk_context *ctx, duk_errcode_t err_code, const char *filename, duk_int_t line, const char *fmt, va_list ap) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_idx_t ret;
duk_hobject *proto;
#ifdef DUK_USE_AUGMENT_ERROR_CREATE
duk_bool_t noblame_fileline;
#endif
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr != NULL);
DUK_UNREF(filename);
DUK_UNREF(line);
/* Error code also packs a tracedata related flag. */
#ifdef DUK_USE_AUGMENT_ERROR_CREATE
noblame_fileline = err_code & DUK_ERRCODE_FLAG_NOBLAME_FILELINE;
#endif
err_code = err_code & (~DUK_ERRCODE_FLAG_NOBLAME_FILELINE);
/* error gets its 'name' from the prototype */
proto = duk_error_prototype_from_code(thr, err_code);
ret = duk_push_object_helper_proto(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_ERROR),
proto);
/* ... and its 'message' from an instance property */
if (fmt) {
duk_push_vsprintf(ctx, fmt, ap);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_MESSAGE, DUK_PROPDESC_FLAGS_WC);
} else {
/* If no explicit message given, put error code into message field
* (as a number). This is not fully in keeping with the Ecmascript
* error model because messages are supposed to be strings (Error
* constructors use ToString() on their argument). However, it's
* probably more useful than having a separate 'code' property.
*/
duk_push_int(ctx, err_code);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_MESSAGE, DUK_PROPDESC_FLAGS_WC);
}
/* XXX: .code = err_code disabled, not sure if useful */
/* Creation time error augmentation */
#ifdef DUK_USE_AUGMENT_ERROR_CREATE
/* filename may be NULL in which case file/line is not recorded */
duk_err_augment_error_create(thr, thr, filename, line, noblame_fileline); /* may throw an error */
#endif
return ret;
}
DUK_EXTERNAL duk_idx_t duk_push_error_object_raw(duk_context *ctx, duk_errcode_t err_code, const char *filename, duk_int_t line, const char *fmt, ...) {
va_list ap;
duk_idx_t ret;
DUK_ASSERT_CTX_VALID(ctx);
va_start(ap, fmt);
ret = duk_push_error_object_va_raw(ctx, err_code, filename, line, fmt, ap);
va_end(ap);
return ret;
}
#if !defined(DUK_USE_VARIADIC_MACROS)
DUK_EXTERNAL duk_idx_t duk_push_error_object_stash(duk_context *ctx, duk_errcode_t err_code, const char *fmt, ...) {
const char *filename = duk_api_global_filename;
duk_int_t line = duk_api_global_line;
va_list ap;
duk_idx_t ret;
DUK_ASSERT_CTX_VALID(ctx);
duk_api_global_filename = NULL;
duk_api_global_line = 0;
va_start(ap, fmt);
ret = duk_push_error_object_va_raw(ctx, err_code, filename, line, fmt, ap);
va_end(ap);
return ret;
}
#endif /* DUK_USE_VARIADIC_MACROS */
DUK_EXTERNAL void *duk_push_buffer_raw(duk_context *ctx, duk_size_t size, duk_small_uint_t flags) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv_slot;
duk_hbuffer *h;
void *buf_data;
DUK_ASSERT_CTX_VALID(ctx);
/* check stack first */
if (thr->valstack_top >= thr->valstack_end) {
DUK_ERROR_API(thr, DUK_STR_PUSH_BEYOND_ALLOC_STACK);
}
/* Check for maximum buffer length. */
if (size > DUK_HBUFFER_MAX_BYTELEN) {
DUK_ERROR_RANGE(thr, DUK_STR_BUFFER_TOO_LONG);
}
h = duk_hbuffer_alloc(thr->heap, size, flags, &buf_data);
if (!h) {
DUK_ERROR_ALLOC_DEFMSG(thr);
}
tv_slot = thr->valstack_top;
DUK_TVAL_SET_BUFFER(tv_slot, h);
DUK_HBUFFER_INCREF(thr, h);
thr->valstack_top++;
return (void *) buf_data;
}
DUK_EXTERNAL duk_idx_t duk_push_heapptr(duk_context *ctx, void *ptr) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_idx_t ret;
DUK_ASSERT_CTX_VALID(ctx);
ret = (duk_idx_t) (thr->valstack_top - thr->valstack_bottom);
if (ptr == NULL) {
goto push_undefined;
}
switch ((int) DUK_HEAPHDR_GET_TYPE((duk_heaphdr *) ptr)) {
case DUK_HTYPE_STRING:
duk_push_hstring(ctx, (duk_hstring *) ptr);
break;
case DUK_HTYPE_OBJECT:
duk_push_hobject(ctx, (duk_hobject *) ptr);
break;
case DUK_HTYPE_BUFFER:
duk_push_hbuffer(ctx, (duk_hbuffer *) ptr);
break;
default:
goto push_undefined;
}
return ret;
push_undefined:
duk_push_undefined(ctx);
return ret;
}
DUK_INTERNAL duk_idx_t duk_push_object_internal(duk_context *ctx) {
return duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT),
-1); /* no prototype */
}
DUK_INTERNAL void duk_push_hstring(duk_context *ctx, duk_hstring *h) {
duk_tval tv;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(h != NULL);
DUK_TVAL_SET_STRING(&tv, h);
duk_push_tval(ctx, &tv);
}
DUK_INTERNAL void duk_push_hstring_stridx(duk_context *ctx, duk_small_int_t stridx) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
DUK_ASSERT(stridx >= 0 && stridx < DUK_HEAP_NUM_STRINGS);
duk_push_hstring(ctx, DUK_HTHREAD_GET_STRING(thr, stridx));
}
DUK_INTERNAL void duk_push_hobject(duk_context *ctx, duk_hobject *h) {
duk_tval tv;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(h != NULL);
DUK_TVAL_SET_OBJECT(&tv, h);
duk_push_tval(ctx, &tv);
}
DUK_INTERNAL void duk_push_hbuffer(duk_context *ctx, duk_hbuffer *h) {
duk_tval tv;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(h != NULL);
DUK_TVAL_SET_BUFFER(&tv, h);
duk_push_tval(ctx, &tv);
}
DUK_INTERNAL void duk_push_hobject_bidx(duk_context *ctx, duk_small_int_t builtin_idx) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr != NULL);
DUK_ASSERT(builtin_idx >= 0 && builtin_idx < DUK_NUM_BUILTINS);
DUK_ASSERT(thr->builtins[builtin_idx] != NULL);
duk_push_hobject(ctx, thr->builtins[builtin_idx]);
}
/*
* Poppers
*/
DUK_EXTERNAL void duk_pop_n(duk_context *ctx, duk_idx_t count) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
if (DUK_UNLIKELY(count < 0)) {
DUK_ERROR_API(thr, DUK_STR_INVALID_COUNT);
return;
}
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
if (DUK_UNLIKELY((duk_size_t) (thr->valstack_top - thr->valstack_bottom) < (duk_size_t) count)) {
DUK_ERROR_API(thr, DUK_STR_POP_TOO_MANY);
}
/*
* Must be very careful here, every DECREF may cause reallocation
* of our valstack.
*/
/* XXX: inlined DECREF macro would be nice here: no NULL check,
* refzero queueing but no refzero algorithm run (= no pointer
* instability), inline code.
*/
/* XXX: optimize loops */
#if defined(DUK_USE_REFERENCE_COUNTING)
while (count > 0) {
count--;
tv = --thr->valstack_top; /* tv points to element just below prev top */
DUK_ASSERT(tv >= thr->valstack_bottom);
DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv); /* side effects */
}
#else
tv = thr->valstack_top;
while (count > 0) {
count--;
tv--;
DUK_ASSERT(tv >= thr->valstack_bottom);
DUK_TVAL_SET_UNDEFINED(tv);
}
thr->valstack_top = tv;
#endif
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
}
/* Popping one element is called so often that when footprint is not an issue,
* compile a specialized function for it.
*/
#if defined(DUK_USE_PREFER_SIZE)
DUK_EXTERNAL void duk_pop(duk_context *ctx) {
DUK_ASSERT_CTX_VALID(ctx);
duk_pop_n(ctx, 1);
}
#else
DUK_EXTERNAL void duk_pop(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
if (DUK_UNLIKELY(thr->valstack_top == thr->valstack_bottom)) {
DUK_ERROR_API(thr, DUK_STR_POP_TOO_MANY);
}
tv = --thr->valstack_top; /* tv points to element just below prev top */
DUK_ASSERT(tv >= thr->valstack_bottom);
#ifdef DUK_USE_REFERENCE_COUNTING
DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv); /* side effects */
#else
DUK_TVAL_SET_UNDEFINED(tv);
#endif
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
}
#endif /* !DUK_USE_PREFER_SIZE */
DUK_EXTERNAL void duk_pop_2(duk_context *ctx) {
DUK_ASSERT_CTX_VALID(ctx);
duk_pop_n(ctx, 2);
}
DUK_EXTERNAL void duk_pop_3(duk_context *ctx) {
DUK_ASSERT_CTX_VALID(ctx);
duk_pop_n(ctx, 3);
}
/*
* Error throwing
*/
DUK_EXTERNAL void duk_throw(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT(thr->valstack_bottom >= thr->valstack);
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
DUK_ASSERT(thr->valstack_end >= thr->valstack_top);
if (thr->valstack_top == thr->valstack_bottom) {
DUK_ERROR_API(thr, DUK_STR_INVALID_CALL_ARGS);
}
/* Errors are augmented when they are created, not when they are
* thrown or re-thrown. The current error handler, however, runs
* just before an error is thrown.
*/
/* Sync so that augmentation sees up-to-date activations, NULL
* thr->ptr_curr_pc so that it's not used if side effects occur
* in augmentation or longjmp handling.
*/
duk_hthread_sync_and_null_currpc(thr);
#if defined(DUK_USE_AUGMENT_ERROR_THROW)
DUK_DDD(DUK_DDDPRINT("THROW ERROR (API): %!dT (before throw augment)", (duk_tval *) duk_get_tval(ctx, -1)));
duk_err_augment_error_throw(thr);
#endif
DUK_DDD(DUK_DDDPRINT("THROW ERROR (API): %!dT (after throw augment)", (duk_tval *) duk_get_tval(ctx, -1)));
duk_err_setup_heap_ljstate(thr, DUK_LJ_TYPE_THROW);
/* thr->heap->lj.jmpbuf_ptr is checked by duk_err_longjmp() so we don't
* need to check that here. If the value is NULL, a panic occurs because
* we can't return.
*/
duk_err_longjmp(thr);
DUK_UNREACHABLE();
}
DUK_EXTERNAL void duk_fatal(duk_context *ctx, duk_errcode_t err_code, const char *err_msg) {
duk_hthread *thr = (duk_hthread *) ctx;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(thr->heap->fatal_func != NULL);
DUK_D(DUK_DPRINT("fatal error occurred, code %ld, message %s",
(long) err_code, (const char *) err_msg));
/* fatal_func should be noreturn, but noreturn declarations on function
* pointers has a very spotty support apparently so it's not currently
* done.
*/
thr->heap->fatal_func(ctx, err_code, err_msg);
DUK_PANIC(DUK_ERR_API_ERROR, "fatal handler returned");
}
DUK_EXTERNAL void duk_error_va_raw(duk_context *ctx, duk_errcode_t err_code, const char *filename, duk_int_t line, const char *fmt, va_list ap) {
DUK_ASSERT_CTX_VALID(ctx);
duk_push_error_object_va_raw(ctx, err_code, filename, line, fmt, ap);
duk_throw(ctx);
}
DUK_EXTERNAL void duk_error_raw(duk_context *ctx, duk_errcode_t err_code, const char *filename, duk_int_t line, const char *fmt, ...) {
va_list ap;
DUK_ASSERT_CTX_VALID(ctx);
va_start(ap, fmt);
duk_push_error_object_va_raw(ctx, err_code, filename, line, fmt, ap);
va_end(ap);
duk_throw(ctx);
}
#if !defined(DUK_USE_VARIADIC_MACROS)
DUK_EXTERNAL void duk_error_stash(duk_context *ctx, duk_errcode_t err_code, const char *fmt, ...) {
const char *filename;
duk_int_t line;
va_list ap;
DUK_ASSERT_CTX_VALID(ctx);
filename = duk_api_global_filename;
line = duk_api_global_line;
duk_api_global_filename = NULL;
duk_api_global_line = 0;
va_start(ap, fmt);
duk_push_error_object_va_raw(ctx, err_code, filename, line, fmt, ap);
va_end(ap);
duk_throw(ctx);
}
#endif /* DUK_USE_VARIADIC_MACROS */
/*
* Comparison
*/
DUK_EXTERNAL duk_bool_t duk_equals(duk_context *ctx, duk_idx_t index1, duk_idx_t index2) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv1, *tv2;
DUK_ASSERT_CTX_VALID(ctx);
tv1 = duk_get_tval(ctx, index1);
tv2 = duk_get_tval(ctx, index2);
if ((tv1 == NULL) || (tv2 == NULL)) {
return 0;
}
/* Coercion may be needed, the helper handles that by pushing the
* tagged values to the stack.
*/
return duk_js_equals(thr, tv1, tv2);
}
DUK_EXTERNAL duk_bool_t duk_strict_equals(duk_context *ctx, duk_idx_t index1, duk_idx_t index2) {
duk_tval *tv1, *tv2;
DUK_ASSERT_CTX_VALID(ctx);
tv1 = duk_get_tval(ctx, index1);
tv2 = duk_get_tval(ctx, index2);
if ((tv1 == NULL) || (tv2 == NULL)) {
return 0;
}
/* No coercions or other side effects, so safe */
return duk_js_strict_equals(tv1, tv2);
}
/*
* instanceof
*/
DUK_EXTERNAL duk_bool_t duk_instanceof(duk_context *ctx, duk_idx_t index1, duk_idx_t index2) {
duk_tval *tv1, *tv2;
DUK_ASSERT_CTX_VALID(ctx);
/* Index validation is strict, which differs from duk_equals().
* The strict behavior mimics how instanceof itself works, e.g.
* it is a TypeError if rval is not a -callable- object. It would
* be somewhat inconsistent if rval would be allowed to be
* non-existent without a TypeError.
*/
tv1 = duk_require_tval(ctx, index1);
DUK_ASSERT(tv1 != NULL);
tv2 = duk_require_tval(ctx, index2);
DUK_ASSERT(tv2 != NULL);
return duk_js_instanceof((duk_hthread *) ctx, tv1, tv2);
}
/*
* Lightfunc
*/
DUK_INTERNAL void duk_push_lightfunc_name(duk_context *ctx, duk_tval *tv) {
duk_c_function func;
DUK_ASSERT(DUK_TVAL_IS_LIGHTFUNC(tv));
/* Lightfunc name, includes Duktape/C native function pointer, which
* can often be used to locate the function from a symbol table.
* The name also includes the 16-bit duk_tval flags field because it
* includes the magic value. Because a single native function often
* provides different functionality depending on the magic value, it
* seems reasonably to include it in the name.
*
* On the other hand, a complicated name increases string table
* pressure in low memory environments (but only when function name
* is accessed).
*/
func = DUK_TVAL_GET_LIGHTFUNC_FUNCPTR(tv);
duk_push_sprintf(ctx, "light_");
duk_push_string_funcptr(ctx, (duk_uint8_t *) &func, sizeof(func));
duk_push_sprintf(ctx, "_%04x", (unsigned int) DUK_TVAL_GET_LIGHTFUNC_FLAGS(tv));
duk_concat(ctx, 3);
}
DUK_INTERNAL void duk_push_lightfunc_tostring(duk_context *ctx, duk_tval *tv) {
DUK_ASSERT(DUK_TVAL_IS_LIGHTFUNC(tv));
duk_push_string(ctx, "function ");
duk_push_lightfunc_name(ctx, tv);
duk_push_string(ctx, "() {\"light\"}");
duk_concat(ctx, 3);
}
/*
* Function pointers
*
* Printing function pointers is non-portable, so we do that by hex printing
* bytes from memory.
*/
DUK_INTERNAL void duk_push_string_funcptr(duk_context *ctx, duk_uint8_t *ptr, duk_size_t sz) {
duk_uint8_t buf[32 * 2];
duk_uint8_t *p, *q;
duk_small_uint_t i;
duk_small_uint_t t;
DUK_ASSERT(sz <= 32); /* sanity limit for function pointer size */
p = buf;
#if defined(DUK_USE_INTEGER_LE)
q = ptr + sz;
#else
q = ptr;
#endif
for (i = 0; i < sz; i++) {
#if defined(DUK_USE_INTEGER_LE)
t = *(--q);
#else
t = *(q++);
#endif
*p++ = duk_lc_digits[t >> 4];
*p++ = duk_lc_digits[t & 0x0f];
}
duk_push_lstring(ctx, (const char *) buf, sz * 2);
}
#if !defined(DUK_USE_PARANOID_ERRORS)
/*
* Push readable string summarizing duk_tval. The operation is side effect
* free and will only throw from internal errors (e.g. out of memory).
* This is used by e.g. property access code to summarize a key/base safely,
* and is not intended to be fast (but small and safe).
*/
#define DUK__READABLE_STRING_MAXCHARS 32
/* String sanitizer which escapes ASCII control characters and a few other
* ASCII characters, passes Unicode as is, and replaces invalid UTF-8 with
* question marks. No errors are thrown for any input string, except in out
* of memory situations.
*/
DUK_LOCAL void duk__push_hstring_readable_unicode(duk_context *ctx, duk_hstring *h_input) {
duk_hthread *thr;
const duk_uint8_t *p, *p_start, *p_end;
duk_uint8_t buf[DUK_UNICODE_MAX_XUTF8_LENGTH * DUK__READABLE_STRING_MAXCHARS +
2 /*quotes*/ + 3 /*periods*/];
duk_uint8_t *q;
duk_ucodepoint_t cp;
duk_small_uint_t nchars;
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(h_input != NULL);
thr = (duk_hthread *) ctx;
p_start = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_input);
p_end = p_start + DUK_HSTRING_GET_BYTELEN(h_input);
p = p_start;
q = buf;
nchars = 0;
*q++ = (duk_uint8_t) DUK_ASC_SINGLEQUOTE;
for (;;) {
if (p >= p_end) {
break;
}
if (nchars == DUK__READABLE_STRING_MAXCHARS) {
*q++ = (duk_uint8_t) DUK_ASC_PERIOD;
*q++ = (duk_uint8_t) DUK_ASC_PERIOD;
*q++ = (duk_uint8_t) DUK_ASC_PERIOD;
break;
}
if (duk_unicode_decode_xutf8(thr, &p, p_start, p_end, &cp)) {
if (cp < 0x20 || cp == 0x7f || cp == DUK_ASC_SINGLEQUOTE || cp == DUK_ASC_BACKSLASH) {
DUK_ASSERT(DUK_UNICODE_MAX_XUTF8_LENGTH >= 4); /* estimate is valid */
DUK_ASSERT((cp >> 4) <= 0x0f);
*q++ = (duk_uint8_t) DUK_ASC_BACKSLASH;
*q++ = (duk_uint8_t) DUK_ASC_LC_X;
*q++ = (duk_uint8_t) duk_lc_digits[cp >> 4];
*q++ = (duk_uint8_t) duk_lc_digits[cp & 0x0f];
} else {
q += duk_unicode_encode_xutf8(cp, q);
}
} else {
p++; /* advance manually */
*q++ = (duk_uint8_t) DUK_ASC_QUESTION;
}
nchars++;
}
*q++ = (duk_uint8_t) DUK_ASC_SINGLEQUOTE;
duk_push_lstring(ctx, (const char *) buf, (duk_size_t) (q - buf));
}
DUK_INTERNAL const char *duk_push_string_tval_readable(duk_context *ctx, duk_tval *tv) {
duk_hthread *thr;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
if (tv == NULL) {
duk_push_string(ctx, "none");
} else {
switch (DUK_TVAL_GET_TAG(tv)) {
case DUK_TAG_STRING: {
duk__push_hstring_readable_unicode(ctx, DUK_TVAL_GET_STRING(tv));
break;
}
case DUK_TAG_OBJECT: {
duk_hobject *h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
duk_push_hobject_class_string(ctx, h);
break;
}
case DUK_TAG_BUFFER: {
/* XXX: Hex encoded, length limited buffer summary here? */
duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv);
DUK_ASSERT(h != NULL);
duk_push_sprintf(ctx, "[buffer:%ld]", (long) DUK_HBUFFER_GET_SIZE(h));
break;
}
case DUK_TAG_POINTER: {
/* Surround with parentheses like in JX, ensures NULL pointer
* is distinguishable from null value ("(null)" vs "null").
*/
duk_push_tval(ctx, tv);
duk_push_sprintf(ctx, "(%s)", duk_to_string(ctx, -1));
duk_remove(ctx, -2);
break;
}
default: {
duk_push_tval(ctx, tv);
break;
}
}
}
return duk_to_string(ctx, -1);
}
DUK_INTERNAL const char *duk_push_string_readable(duk_context *ctx, duk_idx_t index) {
DUK_ASSERT_CTX_VALID(ctx);
return duk_push_string_tval_readable(ctx, duk_get_tval(ctx, index));
}
#endif /* !DUK_USE_PARANOID_ERRORS */
#undef DUK__CHECK_SPACE
#undef DUK__PACK_ARGS
#undef DUK__READABLE_STRING_MAXCHARS
#line 1 "duk_api_string.c"
/*
* String manipulation
*/
/* include removed: duk_internal.h */
DUK_LOCAL void duk__concat_and_join_helper(duk_context *ctx, duk_idx_t count_in, duk_bool_t is_join) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_uint_t count;
duk_uint_t i;
duk_size_t idx;
duk_size_t len;
duk_hstring *h;
duk_uint8_t *buf;
DUK_ASSERT_CTX_VALID(ctx);
if (DUK_UNLIKELY(count_in <= 0)) {
if (count_in < 0) {
DUK_ERROR_API(thr, DUK_STR_INVALID_COUNT);
return;
}
DUK_ASSERT(count_in == 0);
duk_push_hstring_stridx(ctx, DUK_STRIDX_EMPTY_STRING);
return;
}
count = (duk_uint_t) count_in;
if (is_join) {
duk_size_t t1, t2, limit;
h = duk_to_hstring(ctx, -((duk_idx_t) count) - 1);
DUK_ASSERT(h != NULL);
/* A bit tricky overflow test, see doc/code-issues.rst. */
t1 = (duk_size_t) DUK_HSTRING_GET_BYTELEN(h);
t2 = (duk_size_t) (count - 1);
limit = (duk_size_t) DUK_HSTRING_MAX_BYTELEN;
if (DUK_UNLIKELY(t2 != 0 && t1 > limit / t2)) {
/* Combined size of separators already overflows */
goto error_overflow;
}
len = (duk_size_t) (t1 * t2);
} else {
len = (duk_size_t) 0;
}
for (i = count; i >= 1; i--) {
duk_size_t new_len;
duk_to_string(ctx, -((duk_idx_t) i));
h = duk_require_hstring(ctx, -((duk_idx_t) i));
new_len = len + (duk_size_t) DUK_HSTRING_GET_BYTELEN(h);
/* Impose a string maximum length, need to handle overflow
* correctly.
*/
if (new_len < len || /* wrapped */
new_len > (duk_size_t) DUK_HSTRING_MAX_BYTELEN) {
goto error_overflow;
}
len = new_len;
}
DUK_DDD(DUK_DDDPRINT("join/concat %lu strings, total length %lu bytes",
(unsigned long) count, (unsigned long) len));
/* use stack allocated buffer to ensure reachability in errors (e.g. intern error) */
buf = (duk_uint8_t *) duk_push_fixed_buffer(ctx, len);
DUK_ASSERT(buf != NULL);
/* [... (sep) str1 str2 ... strN buf] */
idx = 0;
for (i = count; i >= 1; i--) {
if (is_join && i != count) {
h = duk_require_hstring(ctx, -((duk_idx_t) count) - 2); /* extra -1 for buffer */
DUK_MEMCPY(buf + idx, DUK_HSTRING_GET_DATA(h), DUK_HSTRING_GET_BYTELEN(h));
idx += DUK_HSTRING_GET_BYTELEN(h);
}
h = duk_require_hstring(ctx, -((duk_idx_t) i) - 1); /* extra -1 for buffer */
DUK_MEMCPY(buf + idx, DUK_HSTRING_GET_DATA(h), DUK_HSTRING_GET_BYTELEN(h));
idx += DUK_HSTRING_GET_BYTELEN(h);
}
DUK_ASSERT(idx == len);
/* [... (sep) str1 str2 ... strN buf] */
/* get rid of the strings early to minimize memory use before intern */
if (is_join) {
duk_replace(ctx, -((duk_idx_t) count) - 2); /* overwrite sep */
duk_pop_n(ctx, count);
} else {
duk_replace(ctx, -((duk_idx_t) count) - 1); /* overwrite str1 */
duk_pop_n(ctx, count-1);
}
/* [... buf] */
(void) duk_to_string(ctx, -1);
/* [... res] */
return;
error_overflow:
DUK_ERROR_RANGE(thr, DUK_STR_CONCAT_RESULT_TOO_LONG);
}
DUK_EXTERNAL void duk_concat(duk_context *ctx, duk_idx_t count) {
DUK_ASSERT_CTX_VALID(ctx);
duk__concat_and_join_helper(ctx, count, 0 /*is_join*/);
}
DUK_EXTERNAL void duk_join(duk_context *ctx, duk_idx_t count) {
DUK_ASSERT_CTX_VALID(ctx);
duk__concat_and_join_helper(ctx, count, 1 /*is_join*/);
}
/* XXX: could map/decode be unified with duk_unicode_support.c code?
* Case conversion needs also the character surroundings though.
*/
DUK_EXTERNAL void duk_decode_string(duk_context *ctx, duk_idx_t index, duk_decode_char_function callback, void *udata) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hstring *h_input;
const duk_uint8_t *p, *p_start, *p_end;
duk_codepoint_t cp;
DUK_ASSERT_CTX_VALID(ctx);
h_input = duk_require_hstring(ctx, index);
DUK_ASSERT(h_input != NULL);
p_start = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_input);
p_end = p_start + DUK_HSTRING_GET_BYTELEN(h_input);
p = p_start;
for (;;) {
if (p >= p_end) {
break;
}
cp = (int) duk_unicode_decode_xutf8_checked(thr, &p, p_start, p_end);
callback(udata, cp);
}
}
DUK_EXTERNAL void duk_map_string(duk_context *ctx, duk_idx_t index, duk_map_char_function callback, void *udata) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hstring *h_input;
duk_bufwriter_ctx bw_alloc;
duk_bufwriter_ctx *bw;
const duk_uint8_t *p, *p_start, *p_end;
duk_codepoint_t cp;
DUK_ASSERT_CTX_VALID(ctx);
index = duk_normalize_index(ctx, index);
h_input = duk_require_hstring(ctx, index);
DUK_ASSERT(h_input != NULL);
bw = &bw_alloc;
DUK_BW_INIT_PUSHBUF(thr, bw, DUK_HSTRING_GET_BYTELEN(h_input)); /* reasonable output estimate */
p_start = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_input);
p_end = p_start + DUK_HSTRING_GET_BYTELEN(h_input);
p = p_start;
for (;;) {
/* XXX: could write output in chunks with fewer ensure calls,
* but relative benefit would be small here.
*/
if (p >= p_end) {
break;
}
cp = (int) duk_unicode_decode_xutf8_checked(thr, &p, p_start, p_end);
cp = callback(udata, cp);
DUK_BW_WRITE_ENSURE_XUTF8(thr, bw, cp);
}
DUK_BW_COMPACT(thr, bw);
duk_to_string(ctx, -1);
duk_replace(ctx, index);
}
DUK_EXTERNAL void duk_substring(duk_context *ctx, duk_idx_t index, duk_size_t start_offset, duk_size_t end_offset) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hstring *h;
duk_hstring *res;
duk_size_t start_byte_offset;
duk_size_t end_byte_offset;
DUK_ASSERT_CTX_VALID(ctx);
index = duk_require_normalize_index(ctx, index);
h = duk_require_hstring(ctx, index);
DUK_ASSERT(h != NULL);
if (end_offset >= DUK_HSTRING_GET_CHARLEN(h)) {
end_offset = DUK_HSTRING_GET_CHARLEN(h);
}
if (start_offset > end_offset) {
start_offset = end_offset;
}
DUK_ASSERT_DISABLE(start_offset >= 0);
DUK_ASSERT(start_offset <= end_offset && start_offset <= DUK_HSTRING_GET_CHARLEN(h));
DUK_ASSERT_DISABLE(end_offset >= 0);
DUK_ASSERT(end_offset >= start_offset && end_offset <= DUK_HSTRING_GET_CHARLEN(h));
/* guaranteed by string limits */
DUK_ASSERT(start_offset <= DUK_UINT32_MAX);
DUK_ASSERT(end_offset <= DUK_UINT32_MAX);
start_byte_offset = (duk_size_t) duk_heap_strcache_offset_char2byte(thr, h, (duk_uint_fast32_t) start_offset);
end_byte_offset = (duk_size_t) duk_heap_strcache_offset_char2byte(thr, h, (duk_uint_fast32_t) end_offset);
DUK_ASSERT(end_byte_offset >= start_byte_offset);
DUK_ASSERT(end_byte_offset - start_byte_offset <= DUK_UINT32_MAX); /* guaranteed by string limits */
/* no size check is necessary */
res = duk_heap_string_intern_checked(thr,
DUK_HSTRING_GET_DATA(h) + start_byte_offset,
(duk_uint32_t) (end_byte_offset - start_byte_offset));
duk_push_hstring(ctx, res);
duk_replace(ctx, index);
}
/* XXX: this is quite clunky. Add Unicode helpers to scan backwards and
* forwards with a callback to process codepoints?
*/
DUK_EXTERNAL void duk_trim(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hstring *h;
const duk_uint8_t *p, *p_start, *p_end, *p_tmp1, *p_tmp2; /* pointers for scanning */
const duk_uint8_t *q_start, *q_end; /* start (incl) and end (excl) of trimmed part */
duk_codepoint_t cp;
DUK_ASSERT_CTX_VALID(ctx);
index = duk_require_normalize_index(ctx, index);
h = duk_require_hstring(ctx, index);
DUK_ASSERT(h != NULL);
p_start = DUK_HSTRING_GET_DATA(h);
p_end = p_start + DUK_HSTRING_GET_BYTELEN(h);
p = p_start;
while (p < p_end) {
p_tmp1 = p;
cp = (duk_codepoint_t) duk_unicode_decode_xutf8_checked(thr, &p_tmp1, p_start, p_end);
if (!(duk_unicode_is_whitespace(cp) || duk_unicode_is_line_terminator(cp))) {
break;
}
p = p_tmp1;
}
q_start = p;
if (p == p_end) {
/* entire string is whitespace */
q_end = p;
goto scan_done;
}
p = p_end;
while (p > p_start) {
p_tmp1 = p;
while (p > p_start) {
p--;
if (((*p) & 0xc0) != 0x80) {
break;
}
}
p_tmp2 = p;
cp = (duk_codepoint_t) duk_unicode_decode_xutf8_checked(thr, &p_tmp2, p_start, p_end);
if (!(duk_unicode_is_whitespace(cp) || duk_unicode_is_line_terminator(cp))) {
p = p_tmp1;
break;
}
}
q_end = p;
scan_done:
/* This may happen when forward and backward scanning disagree
* (possible for non-extended-UTF-8 strings).
*/
if (q_end < q_start) {
q_end = q_start;
}
DUK_ASSERT(q_start >= p_start && q_start <= p_end);
DUK_ASSERT(q_end >= p_start && q_end <= p_end);
DUK_ASSERT(q_end >= q_start);
DUK_DDD(DUK_DDDPRINT("trim: p_start=%p, p_end=%p, q_start=%p, q_end=%p",
(const void *) p_start, (const void *) p_end,
(const void *) q_start, (const void *) q_end));
if (q_start == p_start && q_end == p_end) {
DUK_DDD(DUK_DDDPRINT("nothing was trimmed: avoid interning (hashing etc)"));
return;
}
duk_push_lstring(ctx, (const char *) q_start, (duk_size_t) (q_end - q_start));
duk_replace(ctx, index);
}
DUK_EXTERNAL duk_codepoint_t duk_char_code_at(duk_context *ctx, duk_idx_t index, duk_size_t char_offset) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hstring *h;
duk_ucodepoint_t cp;
DUK_ASSERT_CTX_VALID(ctx);
h = duk_require_hstring(ctx, index);
DUK_ASSERT(h != NULL);
DUK_ASSERT_DISABLE(char_offset >= 0); /* always true, arg is unsigned */
if (char_offset >= DUK_HSTRING_GET_CHARLEN(h)) {
return 0;
}
DUK_ASSERT(char_offset <= DUK_UINT_MAX); /* guaranteed by string limits */
cp = duk_hstring_char_code_at_raw(thr, h, (duk_uint_t) char_offset);
return (duk_codepoint_t) cp;
}
#line 1 "duk_api_var.c"
/*
* Variable access
*/
/* include removed: duk_internal.h */
DUK_EXTERNAL void duk_get_var(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_activation *act;
duk_hstring *h_varname;
duk_small_int_t throw_flag = 1; /* always throw ReferenceError for unresolvable */
DUK_ASSERT_CTX_VALID(ctx);
h_varname = duk_require_hstring(ctx, -1); /* XXX: tostring? */
DUK_ASSERT(h_varname != NULL);
act = duk_hthread_get_current_activation(thr);
if (act) {
(void) duk_js_getvar_activation(thr, act, h_varname, throw_flag); /* -> [ ... varname val this ] */
} else {
/* Outside any activation -> look up from global. */
DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL_ENV] != NULL);
(void) duk_js_getvar_envrec(thr, thr->builtins[DUK_BIDX_GLOBAL_ENV], h_varname, throw_flag);
}
/* [ ... varname val this ] (because throw_flag == 1, always resolved) */
duk_pop(ctx);
duk_remove(ctx, -2);
/* [ ... val ] */
/* Return value would be pointless: because throw_flag==1, we always
* throw if the identifier doesn't resolve.
*/
return;
}
DUK_EXTERNAL void duk_put_var(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_activation *act;
duk_hstring *h_varname;
duk_tval *tv_val;
duk_small_int_t throw_flag;
DUK_ASSERT_CTX_VALID(ctx);
h_varname = duk_require_hstring(ctx, -2); /* XXX: tostring? */
DUK_ASSERT(h_varname != NULL);
tv_val = duk_require_tval(ctx, -1);
throw_flag = duk_is_strict_call(ctx);
act = duk_hthread_get_current_activation(thr);
if (act) {
duk_js_putvar_activation(thr, act, h_varname, tv_val, throw_flag); /* -> [ ... varname val this ] */
} else {
/* Outside any activation -> put to global. */
DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL_ENV] != NULL);
duk_js_putvar_envrec(thr, thr->builtins[DUK_BIDX_GLOBAL_ENV], h_varname, tv_val, throw_flag);
}
/* [ ... varname val ] */
duk_pop_2(ctx);
/* [ ... ] */
return;
}
DUK_EXTERNAL duk_bool_t duk_del_var(duk_context *ctx) {
DUK_ASSERT_CTX_VALID(ctx);
DUK_ERROR_UNIMPLEMENTED_DEFMSG((duk_hthread *) ctx);
return 0;
}
DUK_EXTERNAL duk_bool_t duk_has_var(duk_context *ctx) {
DUK_ASSERT_CTX_VALID(ctx);
DUK_ERROR_UNIMPLEMENTED_DEFMSG((duk_hthread *) ctx);
return 0;
}
#line 1 "duk_bi_array.c"
/*
* Array built-ins
*
* Note that most Array built-ins are intentionally generic and work even
* when the 'this' binding is not an Array instance. To ensure this,
* Array algorithms do not assume "magical" Array behavior for the "length"
* property, for instance.
*
* XXX: the "Throw" flag should be set for (almost?) all [[Put]] and
* [[Delete]] operations, but it's currently false throughout. Go through
* all put/delete cases and check throw flag use. Need a new API primitive
* which allows throws flag to be specified.
*
* XXX: array lengths above 2G won't work reliably. There are many places
* where one needs a full signed 32-bit range ([-0xffffffff, 0xffffffff],
* i.e. -33- bits). Although array 'length' cannot be written to be outside
* the unsigned 32-bit range (E5.1 Section 15.4.5.1 throws a RangeError if so)
* some intermediate values may be above 0xffffffff and this may not be always
* correctly handled now (duk_uint32_t is not enough for all algorithms).
*
* For instance, push() can legitimately write entries beyond length 0xffffffff
* and cause a RangeError only at the end. To do this properly, the current
* push() implementation tracks the array index using a 'double' instead of a
* duk_uint32_t (which is somewhat awkward). See test-bi-array-push-maxlen.js.
*
* On using "put" vs. "def" prop
* =============================
*
* Code below must be careful to use the appropriate primitive as it matters
* for compliance. When using "put" there may be inherited properties in
* Array.prototype which cause side effects when values are written. When
* using "define" there are no such side effects, and many test262 test cases
* check for this (for real world code, such side effects are very rare).
* Both "put" and "define" are used in the E5.1 specification; as a rule,
* "put" is used when modifying an existing array (or a non-array 'this'
* binding) and "define" for setting values into a fresh result array.
*
* Also note that Array instance 'length' should be writable, but not
* enumerable and definitely not configurable: even Duktape code internally
* assumes that an Array instance will always have a 'length' property.
* Preventing deletion of the property is critical.
*/
/* include removed: duk_internal.h */
/* Perform an intermediate join when this many elements have been pushed
* on the value stack.
*/
#define DUK__ARRAY_MID_JOIN_LIMIT 4096
/* Shared entry code for many Array built-ins. Note that length is left
* on stack (it could be popped, but that's not necessary).
*/
DUK_LOCAL duk_uint32_t duk__push_this_obj_len_u32(duk_context *ctx) {
duk_uint32_t len;
(void) duk_push_this_coercible_to_object(ctx);
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_LENGTH);
len = duk_to_uint32(ctx, -1);
/* -> [ ... ToObject(this) ToUint32(length) ] */
return len;
}
DUK_LOCAL duk_uint32_t duk__push_this_obj_len_u32_limited(duk_context *ctx) {
/* Range limited to [0, 0x7fffffff] range, i.e. range that can be
* represented with duk_int32_t. Use this when the method doesn't
* handle the full 32-bit unsigned range correctly.
*/
duk_uint32_t ret = duk__push_this_obj_len_u32(ctx);
if (DUK_UNLIKELY(ret >= 0x80000000UL)) {
DUK_ERROR_RANGE((duk_hthread *) ctx, DUK_STR_ARRAY_LENGTH_OVER_2G);
}
return ret;
}
/*
* Constructor
*/
DUK_INTERNAL duk_ret_t duk_bi_array_constructor(duk_context *ctx) {
duk_idx_t nargs;
duk_double_t d;
duk_uint32_t len;
duk_idx_t i;
nargs = duk_get_top(ctx);
duk_push_array(ctx);
if (nargs == 1 && duk_is_number(ctx, 0)) {
/* XXX: expensive check (also shared elsewhere - so add a shared internal API call?) */
d = duk_get_number(ctx, 0);
len = duk_to_uint32(ctx, 0);
if (((duk_double_t) len) != d) {
return DUK_RET_RANGE_ERROR;
}
/* XXX: if 'len' is low, may want to ensure array part is kept:
* the caller is likely to want a dense array.
*/
duk_push_u32(ctx, len);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_W); /* [ ToUint32(len) array ToUint32(len) ] -> [ ToUint32(len) array ] */
return 1;
}
/* XXX: optimize by creating array into correct size directly, and
* operating on the array part directly; values can be memcpy()'d from
* value stack directly as long as refcounts are increased.
*/
for (i = 0; i < nargs; i++) {
duk_dup(ctx, i);
duk_xdef_prop_index_wec(ctx, -2, (duk_uarridx_t) i);
}
duk_push_u32(ctx, (duk_uint32_t) nargs);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_W);
return 1;
}
/*
* isArray()
*/
DUK_INTERNAL duk_ret_t duk_bi_array_constructor_is_array(duk_context *ctx) {
duk_hobject *h;
h = duk_get_hobject_with_class(ctx, 0, DUK_HOBJECT_CLASS_ARRAY);
duk_push_boolean(ctx, (h != NULL));
return 1;
}
/*
* toString()
*/
DUK_INTERNAL duk_ret_t duk_bi_array_prototype_to_string(duk_context *ctx) {
(void) duk_push_this_coercible_to_object(ctx);
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_JOIN);
/* [ ... this func ] */
if (!duk_is_callable(ctx, -1)) {
/* Fall back to the initial (original) Object.toString(). We don't
* currently have pointers to the built-in functions, only the top
* level global objects (like "Array") so this is now done in a bit
* of a hacky manner. It would be cleaner to push the (original)
* function and use duk_call_method().
*/
/* XXX: 'this' will be ToObject() coerced twice, which is incorrect
* but should have no visible side effects.
*/
DUK_DDD(DUK_DDDPRINT("this.join is not callable, fall back to (original) Object.toString"));
duk_set_top(ctx, 0);
return duk_bi_object_prototype_to_string(ctx); /* has access to 'this' binding */
}
/* [ ... this func ] */
duk_insert(ctx, -2);
/* [ ... func this ] */
DUK_DDD(DUK_DDDPRINT("calling: func=%!iT, this=%!iT",
(duk_tval *) duk_get_tval(ctx, -2),
(duk_tval *) duk_get_tval(ctx, -1)));
duk_call_method(ctx, 0);
return 1;
}
/*
* concat()
*/
DUK_INTERNAL duk_ret_t duk_bi_array_prototype_concat(duk_context *ctx) {
duk_idx_t i, n;
duk_uarridx_t idx, idx_last;
duk_uarridx_t j, len;
duk_hobject *h;
/* XXX: the insert here is a bit expensive if there are a lot of items.
* It could also be special cased in the outermost for loop quite easily
* (as the element is dup()'d anyway).
*/
(void) duk_push_this_coercible_to_object(ctx);
duk_insert(ctx, 0);
n = duk_get_top(ctx);
duk_push_array(ctx); /* -> [ ToObject(this) item1 ... itemN arr ] */
/* NOTE: The Array special behaviors are NOT invoked by duk_xdef_prop_index()
* (which differs from the official algorithm). If no error is thrown, this
* doesn't matter as the length is updated at the end. However, if an error
* is thrown, the length will be unset. That shouldn't matter because the
* caller won't get a reference to the intermediate value.
*/
idx = 0;
idx_last = 0;
for (i = 0; i < n; i++) {
DUK_ASSERT_TOP(ctx, n + 1);
/* [ ToObject(this) item1 ... itemN arr ] */
duk_dup(ctx, i);
h = duk_get_hobject_with_class(ctx, -1, DUK_HOBJECT_CLASS_ARRAY);
if (!h) {
duk_xdef_prop_index_wec(ctx, -2, idx++);
idx_last = idx;
continue;
}
/* [ ToObject(this) item1 ... itemN arr item(i) ] */
/* XXX: an array can have length higher than 32 bits; this is not handled
* correctly now.
*/
len = (duk_uarridx_t) duk_get_length(ctx, -1);
for (j = 0; j < len; j++) {
if (duk_get_prop_index(ctx, -1, j)) {
/* [ ToObject(this) item1 ... itemN arr item(i) item(i)[j] ] */
duk_xdef_prop_index_wec(ctx, -3, idx++);
idx_last = idx;
} else {
idx++;
duk_pop(ctx);
#if defined(DUK_USE_NONSTD_ARRAY_CONCAT_TRAILER)
/* According to E5.1 Section 15.4.4.4 nonexistent trailing
* elements do not affect 'length' of the result. Test262
* and other engines disagree, so update idx_last here too.
*/
idx_last = idx;
#else
/* Strict standard behavior, ignore trailing elements for
* result 'length'.
*/
#endif
}
}
duk_pop(ctx);
}
/* The E5.1 Section 15.4.4.4 algorithm doesn't set the length explicitly
* in the end, but because we're operating with an internal value which
* is known to be an array, this should be equivalent.
*/
duk_push_uarridx(ctx, idx_last);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_W);
DUK_ASSERT_TOP(ctx, n + 1);
return 1;
}
/*
* join(), toLocaleString()
*
* Note: checking valstack is necessary, but only in the per-element loop.
*
* Note: the trivial approach of pushing all the elements on the value stack
* and then calling duk_join() fails when the array contains a large number
* of elements. This problem can't be offloaded to duk_join() because the
* elements to join must be handled here and have special handling. Current
* approach is to do intermediate joins with very large number of elements.
* There is no fancy handling; the prefix gets re-joined multiple times.
*/
DUK_INTERNAL duk_ret_t duk_bi_array_prototype_join_shared(duk_context *ctx) {
duk_uint32_t len, count;
duk_uint32_t idx;
duk_small_int_t to_locale_string = duk_get_current_magic(ctx);
duk_idx_t valstack_required;
/* For join(), nargs is 1. For toLocaleString(), nargs is 0 and
* setting the top essentially pushes an undefined to the stack,
* thus defaulting to a comma separator.
*/
duk_set_top(ctx, 1);
if (duk_is_undefined(ctx, 0)) {
duk_pop(ctx);
duk_push_hstring_stridx(ctx, DUK_STRIDX_COMMA);
} else {
duk_to_string(ctx, 0);
}
len = duk__push_this_obj_len_u32(ctx);
/* [ sep ToObject(this) len ] */
DUK_DDD(DUK_DDDPRINT("sep=%!T, this=%!T, len=%lu",
(duk_tval *) duk_get_tval(ctx, 0),
(duk_tval *) duk_get_tval(ctx, 1),
(unsigned long) len));
/* The extra (+4) is tight. */
valstack_required = (len >= DUK__ARRAY_MID_JOIN_LIMIT ?
DUK__ARRAY_MID_JOIN_LIMIT : len) + 4;
duk_require_stack(ctx, valstack_required);
duk_dup(ctx, 0);
/* [ sep ToObject(this) len sep ] */
count = 0;
idx = 0;
for (;;) {
if (count >= DUK__ARRAY_MID_JOIN_LIMIT || /* intermediate join to avoid valstack overflow */
idx >= len) { /* end of loop (careful with len==0) */
/* [ sep ToObject(this) len sep str0 ... str(count-1) ] */
DUK_DDD(DUK_DDDPRINT("mid/final join, count=%ld, idx=%ld, len=%ld",
(long) count, (long) idx, (long) len));
duk_join(ctx, (duk_idx_t) count); /* -> [ sep ToObject(this) len str ] */
duk_dup(ctx, 0); /* -> [ sep ToObject(this) len str sep ] */
duk_insert(ctx, -2); /* -> [ sep ToObject(this) len sep str ] */
count = 1;
}
if (idx >= len) {
/* if true, the stack already contains the final result */
break;
}
duk_get_prop_index(ctx, 1, (duk_uarridx_t) idx);
if (duk_is_null_or_undefined(ctx, -1)) {
duk_pop(ctx);
duk_push_hstring_stridx(ctx, DUK_STRIDX_EMPTY_STRING);
} else {
if (to_locale_string) {
duk_to_object(ctx, -1);
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_TO_LOCALE_STRING);
duk_insert(ctx, -2); /* -> [ ... toLocaleString ToObject(val) ] */
duk_call_method(ctx, 0);
duk_to_string(ctx, -1);
} else {
duk_to_string(ctx, -1);
}
}
count++;
idx++;
}
/* [ sep ToObject(this) len sep result ] */
return 1;
}
/*
* pop(), push()
*/
DUK_INTERNAL duk_ret_t duk_bi_array_prototype_pop(duk_context *ctx) {
duk_uint32_t len;
duk_uint32_t idx;
DUK_ASSERT_TOP(ctx, 0);
len = duk__push_this_obj_len_u32(ctx);
if (len == 0) {
duk_push_int(ctx, 0);
duk_put_prop_stridx(ctx, 0, DUK_STRIDX_LENGTH);
return 0;
}
idx = len - 1;
duk_get_prop_index(ctx, 0, (duk_uarridx_t) idx);
duk_del_prop_index(ctx, 0, (duk_uarridx_t) idx);
duk_push_u32(ctx, idx);
duk_put_prop_stridx(ctx, 0, DUK_STRIDX_LENGTH);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_array_prototype_push(duk_context *ctx) {
/* Note: 'this' is not necessarily an Array object. The push()
* algorithm is supposed to work for other kinds of objects too,
* so the algorithm has e.g. an explicit update for the 'length'
* property which is normally "magical" in arrays.
*/
duk_uint32_t len;
duk_idx_t i, n;
n = duk_get_top(ctx);
len = duk__push_this_obj_len_u32(ctx);
/* [ arg1 ... argN obj length ] */
/* Technically Array.prototype.push() can create an Array with length
* longer than 2^32-1, i.e. outside the 32-bit range. The final length
* is *not* wrapped to 32 bits in the specification.
*
* This implementation tracks length with a uint32 because it's much
* more practical.
*
* See: test-bi-array-push-maxlen.js.
*/
if (len + (duk_uint32_t) n < len) {
DUK_D(DUK_DPRINT("Array.prototype.push() would go beyond 32-bit length, throw"));
return DUK_RET_RANGE_ERROR;
}
for (i = 0; i < n; i++) {
duk_dup(ctx, i);
duk_put_prop_index(ctx, -3, len + i);
}
len += n;
duk_push_u32(ctx, len);
duk_dup_top(ctx);
duk_put_prop_stridx(ctx, -4, DUK_STRIDX_LENGTH);
/* [ arg1 ... argN obj length new_length ] */
return 1;
}
/*
* sort()
*
* Currently qsort with random pivot. This is now really, really slow,
* because there is no fast path for array parts.
*
* Signed indices are used because qsort() leaves and degenerate cases
* may use a negative offset.
*/
DUK_LOCAL duk_small_int_t duk__array_sort_compare(duk_context *ctx, duk_int_t idx1, duk_int_t idx2) {
duk_bool_t have1, have2;
duk_bool_t undef1, undef2;
duk_small_int_t ret;
duk_idx_t idx_obj = 1; /* fixed offsets in valstack */
duk_idx_t idx_fn = 0;
duk_hstring *h1, *h2;
/* Fast exit if indices are identical. This is valid for a non-existent property,
* for an undefined value, and almost always for ToString() coerced comparison of
* arbitrary values (corner cases where this is not the case include e.g. a an
* object with varying ToString() coercion).
*
* The specification does not prohibit "caching" of values read from the array, so
* assuming equality for comparing an index with itself falls into the category of
* "caching".
*
* Also, compareFn may be inconsistent, so skipping a call to compareFn here may
* have an effect on the final result. The specification does not require any
* specific behavior for inconsistent compare functions, so again, this fast path
* is OK.
*/
if (idx1 == idx2) {
DUK_DDD(DUK_DDDPRINT("duk__array_sort_compare: idx1=%ld, idx2=%ld -> indices identical, quick exit",
(long) idx1, (long) idx2));
return 0;
}
have1 = duk_get_prop_index(ctx, idx_obj, (duk_uarridx_t) idx1);
have2 = duk_get_prop_index(ctx, idx_obj, (duk_uarridx_t) idx2);
DUK_DDD(DUK_DDDPRINT("duk__array_sort_compare: idx1=%ld, idx2=%ld, have1=%ld, have2=%ld, val1=%!T, val2=%!T",
(long) idx1, (long) idx2, (long) have1, (long) have2,
(duk_tval *) duk_get_tval(ctx, -2), (duk_tval *) duk_get_tval(ctx, -1)));
if (have1) {
if (have2) {
;
} else {
ret = -1;
goto pop_ret;
}
} else {
if (have2) {
ret = 1;
goto pop_ret;
} else {
ret = 0;
goto pop_ret;
}
}
undef1 = duk_is_undefined(ctx, -2);
undef2 = duk_is_undefined(ctx, -1);
if (undef1) {
if (undef2) {
ret = 0;
goto pop_ret;
} else {
ret = 1;
goto pop_ret;
}
} else {
if (undef2) {
ret = -1;
goto pop_ret;
} else {
;
}
}
if (!duk_is_undefined(ctx, idx_fn)) {
duk_double_t d;
/* no need to check callable; duk_call() will do that */
duk_dup(ctx, idx_fn); /* -> [ ... x y fn ] */
duk_insert(ctx, -3); /* -> [ ... fn x y ] */
duk_call(ctx, 2); /* -> [ ... res ] */
/* The specification is a bit vague what to do if the return
* value is not a number. Other implementations seem to
* tolerate non-numbers but e.g. V8 won't apparently do a
* ToNumber().
*/
/* XXX: best behavior for real world compatibility? */
d = duk_to_number(ctx, -1);
if (d < 0.0) {
ret = -1;
} else if (d > 0.0) {
ret = 1;
} else {
ret = 0;
}
duk_pop(ctx);
DUK_DDD(DUK_DDDPRINT("-> result %ld (from comparefn, after coercion)", (long) ret));
return ret;
}
/* string compare is the default (a bit oddly) */
h1 = duk_to_hstring(ctx, -2);
h2 = duk_to_hstring(ctx, -1);
DUK_ASSERT(h1 != NULL);
DUK_ASSERT(h2 != NULL);
ret = duk_js_string_compare(h1, h2); /* retval is directly usable */
goto pop_ret;
pop_ret:
duk_pop_2(ctx);
DUK_DDD(DUK_DDDPRINT("-> result %ld", (long) ret));
return ret;
}
DUK_LOCAL void duk__array_sort_swap(duk_context *ctx, duk_int_t l, duk_int_t r) {
duk_bool_t have_l, have_r;
duk_idx_t idx_obj = 1; /* fixed offset in valstack */
if (l == r) {
return;
}
/* swap elements; deal with non-existent elements correctly */
have_l = duk_get_prop_index(ctx, idx_obj, (duk_uarridx_t) l);
have_r = duk_get_prop_index(ctx, idx_obj, (duk_uarridx_t) r);
if (have_r) {
/* right exists, [[Put]] regardless whether or not left exists */
duk_put_prop_index(ctx, idx_obj, (duk_uarridx_t) l);
} else {
duk_del_prop_index(ctx, idx_obj, (duk_uarridx_t) l);
duk_pop(ctx);
}
if (have_l) {
duk_put_prop_index(ctx, idx_obj, (duk_uarridx_t) r);
} else {
duk_del_prop_index(ctx, idx_obj, (duk_uarridx_t) r);
duk_pop(ctx);
}
}
#if defined(DUK_USE_DDDPRINT)
/* Debug print which visualizes the qsort partitioning process. */
DUK_LOCAL void duk__debuglog_qsort_state(duk_context *ctx, duk_int_t lo, duk_int_t hi, duk_int_t pivot) {
char buf[4096];
char *ptr = buf;
duk_int_t i, n;
n = (duk_int_t) duk_get_length(ctx, 1);
if (n > 4000) {
n = 4000;
}
*ptr++ = '[';
for (i = 0; i < n; i++) {
if (i == pivot) {
*ptr++ = '|';
} else if (i == lo) {
*ptr++ = '<';
} else if (i == hi) {
*ptr++ = '>';
} else if (i >= lo && i <= hi) {
*ptr++ = '-';
} else {
*ptr++ = ' ';
}
}
*ptr++ = ']';
*ptr++ = '\0';
DUK_DDD(DUK_DDDPRINT("%s (lo=%ld, hi=%ld, pivot=%ld)",
(const char *) buf, (long) lo, (long) hi, (long) pivot));
}
#endif
DUK_LOCAL void duk__array_qsort(duk_context *ctx, duk_int_t lo, duk_int_t hi) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_int_t p, l, r;
/* The lo/hi indices may be crossed and hi < 0 is possible at entry. */
DUK_DDD(DUK_DDDPRINT("duk__array_qsort: lo=%ld, hi=%ld, obj=%!T",
(long) lo, (long) hi, (duk_tval *) duk_get_tval(ctx, 1)));
DUK_ASSERT_TOP(ctx, 3);
/* In some cases it may be that lo > hi, or hi < 0; these
* degenerate cases happen e.g. for empty arrays, and in
* recursion leaves.
*/
/* trivial cases */
if (hi - lo < 1) {
DUK_DDD(DUK_DDDPRINT("degenerate case, return immediately"));
return;
}
DUK_ASSERT(hi > lo);
DUK_ASSERT(hi - lo + 1 >= 2);
/* randomized pivot selection */
p = lo + (duk_util_tinyrandom_get_bits(thr, 30) % (hi - lo + 1)); /* rnd in [lo,hi] */
DUK_ASSERT(p >= lo && p <= hi);
DUK_DDD(DUK_DDDPRINT("lo=%ld, hi=%ld, chose pivot p=%ld",
(long) lo, (long) hi, (long) p));
/* move pivot out of the way */
duk__array_sort_swap(ctx, p, lo);
p = lo;
DUK_DDD(DUK_DDDPRINT("pivot moved out of the way: %!T", (duk_tval *) duk_get_tval(ctx, 1)));
l = lo + 1;
r = hi;
for (;;) {
/* find elements to swap */
for (;;) {
DUK_DDD(DUK_DDDPRINT("left scan: l=%ld, r=%ld, p=%ld",
(long) l, (long) r, (long) p));
if (l >= hi) {
break;
}
if (duk__array_sort_compare(ctx, l, p) >= 0) { /* !(l < p) */
break;
}
l++;
}
for (;;) {
DUK_DDD(DUK_DDDPRINT("right scan: l=%ld, r=%ld, p=%ld",
(long) l, (long) r, (long) p));
if (r <= lo) {
break;
}
if (duk__array_sort_compare(ctx, p, r) >= 0) { /* !(p < r) */
break;
}
r--;
}
if (l >= r) {
goto done;
}
DUK_ASSERT(l < r);
DUK_DDD(DUK_DDDPRINT("swap %ld and %ld", (long) l, (long) r));
duk__array_sort_swap(ctx, l, r);
DUK_DDD(DUK_DDDPRINT("after swap: %!T", (duk_tval *) duk_get_tval(ctx, 1)));
l++;
r--;
}
done:
/* Note that 'l' and 'r' may cross, i.e. r < l */
DUK_ASSERT(l >= lo && l <= hi);
DUK_ASSERT(r >= lo && r <= hi);
/* XXX: there's no explicit recursion bound here now. For the average
* qsort recursion depth O(log n) that's not really necessary: e.g. for
* 2**32 recursion depth would be about 32 which is OK. However, qsort
* worst case recursion depth is O(n) which may be a problem.
*/
/* move pivot to its final place */
DUK_DDD(DUK_DDDPRINT("before final pivot swap: %!T", (duk_tval *) duk_get_tval(ctx, 1)));
duk__array_sort_swap(ctx, lo, r);
#if defined(DUK_USE_DDDPRINT)
duk__debuglog_qsort_state(ctx, lo, hi, r);
#endif
DUK_DDD(DUK_DDDPRINT("recurse: pivot=%ld, obj=%!T", (long) r, (duk_tval *) duk_get_tval(ctx, 1)));
duk__array_qsort(ctx, lo, r - 1);
duk__array_qsort(ctx, r + 1, hi);
}
DUK_INTERNAL duk_ret_t duk_bi_array_prototype_sort(duk_context *ctx) {
duk_uint32_t len;
/* XXX: len >= 0x80000000 won't work below because a signed type
* is needed by qsort.
*/
len = duk__push_this_obj_len_u32_limited(ctx);
/* stack[0] = compareFn
* stack[1] = ToObject(this)
* stack[2] = ToUint32(length)
*/
if (len > 0) {
/* avoid degenerate cases, so that (len - 1) won't underflow */
duk__array_qsort(ctx, (duk_int_t) 0, (duk_int_t) (len - 1));
}
DUK_ASSERT_TOP(ctx, 3);
duk_pop(ctx);
return 1; /* return ToObject(this) */
}
/*
* splice()
*/
/* XXX: this compiles to over 500 bytes now, even without special handling
* for an array part. Uses signed ints so does not handle full array range correctly.
*/
/* XXX: can shift() / unshift() use the same helper?
* shift() is (close to?) <--> splice(0, 1)
* unshift is (close to?) <--> splice(0, 0, [items])?
*/
DUK_INTERNAL duk_ret_t duk_bi_array_prototype_splice(duk_context *ctx) {
duk_idx_t nargs;
duk_uint32_t len;
duk_bool_t have_delcount;
duk_int_t item_count;
duk_int_t act_start;
duk_int_t del_count;
duk_int_t i, n;
DUK_UNREF(have_delcount);
nargs = duk_get_top(ctx);
if (nargs < 2) {
duk_set_top(ctx, 2);
nargs = 2;
have_delcount = 0;
} else {
have_delcount = 1;
}
/* XXX: len >= 0x80000000 won't work below because we need to be
* able to represent -len.
*/
len = duk__push_this_obj_len_u32_limited(ctx);
act_start = duk_to_int_clamped(ctx, 0, -((duk_int_t) len), (duk_int_t) len);
if (act_start < 0) {
act_start = len + act_start;
}
DUK_ASSERT(act_start >= 0 && act_start <= (duk_int_t) len);
#ifdef DUK_USE_NONSTD_ARRAY_SPLICE_DELCOUNT
if (have_delcount) {
#endif
del_count = duk_to_int_clamped(ctx, 1, 0, len - act_start);
#ifdef DUK_USE_NONSTD_ARRAY_SPLICE_DELCOUNT
} else {
/* E5.1 standard behavior when deleteCount is not given would be
* to treat it just like if 'undefined' was given, which coerces
* ultimately to 0. Real world behavior is to splice to the end
* of array, see test-bi-array-proto-splice-no-delcount.js.
*/
del_count = len - act_start;
}
#endif
DUK_ASSERT(nargs >= 2);
item_count = (duk_int_t) (nargs - 2);
DUK_ASSERT(del_count >= 0 && del_count <= (duk_int_t) len - act_start);
DUK_ASSERT(del_count + act_start <= (duk_int_t) len);
/* For now, restrict result array into 32-bit length range. */
if (((duk_double_t) len) - ((duk_double_t) del_count) + ((duk_double_t) item_count) > (duk_double_t) DUK_UINT32_MAX) {
DUK_D(DUK_DPRINT("Array.prototype.splice() would go beyond 32-bit length, throw"));
return DUK_RET_RANGE_ERROR;
}
duk_push_array(ctx);
/* stack[0] = start
* stack[1] = deleteCount
* stack[2...nargs-1] = items
* stack[nargs] = ToObject(this) -3
* stack[nargs+1] = ToUint32(length) -2
* stack[nargs+2] = result array -1
*/
DUK_ASSERT_TOP(ctx, nargs + 3);
/* Step 9: copy elements-to-be-deleted into the result array */
for (i = 0; i < del_count; i++) {
if (duk_get_prop_index(ctx, -3, (duk_uarridx_t) (act_start + i))) {
duk_xdef_prop_index_wec(ctx, -2, i); /* throw flag irrelevant (false in std alg) */
} else {
duk_pop(ctx);
}
}
duk_push_u32(ctx, (duk_uint32_t) del_count);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_W);
/* Steps 12 and 13: reorganize elements to make room for itemCount elements */
if (item_count < del_count) {
/* [ A B C D E F G H ] rel_index = 2, del_count 3, item count 1
* -> [ A B F G H ] (conceptual intermediate step)
* -> [ A B . F G H ] (placeholder marked)
* [ A B C F G H ] (actual result at this point, C will be replaced)
*/
DUK_ASSERT_TOP(ctx, nargs + 3);
n = len - del_count;
for (i = act_start; i < n; i++) {
if (duk_get_prop_index(ctx, -3, (duk_uarridx_t) (i + del_count))) {
duk_put_prop_index(ctx, -4, (duk_uarridx_t) (i + item_count));
} else {
duk_pop(ctx);
duk_del_prop_index(ctx, -3, (duk_uarridx_t) (i + item_count));
}
}
DUK_ASSERT_TOP(ctx, nargs + 3);
/* loop iterator init and limit changed from standard algorithm */
n = len - del_count + item_count;
for (i = len - 1; i >= n; i--) {
duk_del_prop_index(ctx, -3, (duk_uarridx_t) i);
}
DUK_ASSERT_TOP(ctx, nargs + 3);
} else if (item_count > del_count) {
/* [ A B C D E F G H ] rel_index = 2, del_count 3, item count 4
* -> [ A B F G H ] (conceptual intermediate step)
* -> [ A B . . . . F G H ] (placeholder marked)
* [ A B C D E F F G H ] (actual result at this point)
*/
DUK_ASSERT_TOP(ctx, nargs + 3);
/* loop iterator init and limit changed from standard algorithm */
for (i = len - del_count - 1; i >= act_start; i--) {
if (duk_get_prop_index(ctx, -3, (duk_uarridx_t) (i + del_count))) {
duk_put_prop_index(ctx, -4, (duk_uarridx_t) (i + item_count));
} else {
duk_pop(ctx);
duk_del_prop_index(ctx, -3, (duk_uarridx_t) (i + item_count));
}
}
DUK_ASSERT_TOP(ctx, nargs + 3);
} else {
/* [ A B C D E F G H ] rel_index = 2, del_count 3, item count 3
* -> [ A B F G H ] (conceptual intermediate step)
* -> [ A B . . . F G H ] (placeholder marked)
* [ A B C D E F G H ] (actual result at this point)
*/
}
DUK_ASSERT_TOP(ctx, nargs + 3);
/* Step 15: insert itemCount elements into the hole made above */
for (i = 0; i < item_count; i++) {
duk_dup(ctx, i + 2); /* args start at index 2 */
duk_put_prop_index(ctx, -4, (duk_uarridx_t) (act_start + i));
}
/* Step 16: update length; note that the final length may be above 32 bit range
* (but we checked above that this isn't the case here)
*/
duk_push_u32(ctx, len - del_count + item_count);
duk_put_prop_stridx(ctx, -4, DUK_STRIDX_LENGTH);
/* result array is already at the top of stack */
DUK_ASSERT_TOP(ctx, nargs + 3);
return 1;
}
/*
* reverse()
*/
DUK_INTERNAL duk_ret_t duk_bi_array_prototype_reverse(duk_context *ctx) {
duk_uint32_t len;
duk_uint32_t middle;
duk_uint32_t lower, upper;
duk_bool_t have_lower, have_upper;
len = duk__push_this_obj_len_u32(ctx);
middle = len / 2;
/* If len <= 1, middle will be 0 and for-loop bails out
* immediately (0 < 0 -> false).
*/
for (lower = 0; lower < middle; lower++) {
DUK_ASSERT(len >= 2);
DUK_ASSERT_TOP(ctx, 2);
DUK_ASSERT(len >= lower + 1);
upper = len - lower - 1;
have_lower = duk_get_prop_index(ctx, -2, (duk_uarridx_t) lower);
have_upper = duk_get_prop_index(ctx, -3, (duk_uarridx_t) upper);
/* [ ToObject(this) ToUint32(length) lowerValue upperValue ] */
if (have_upper) {
duk_put_prop_index(ctx, -4, (duk_uarridx_t) lower);
} else {
duk_del_prop_index(ctx, -4, (duk_uarridx_t) lower);
duk_pop(ctx);
}
if (have_lower) {
duk_put_prop_index(ctx, -3, (duk_uarridx_t) upper);
} else {
duk_del_prop_index(ctx, -3, (duk_uarridx_t) upper);
duk_pop(ctx);
}
DUK_ASSERT_TOP(ctx, 2);
}
DUK_ASSERT_TOP(ctx, 2);
duk_pop(ctx); /* -> [ ToObject(this) ] */
return 1;
}
/*
* slice()
*/
DUK_INTERNAL duk_ret_t duk_bi_array_prototype_slice(duk_context *ctx) {
duk_uint32_t len;
duk_int_t start, end;
duk_int_t i;
duk_uarridx_t idx;
duk_uint32_t res_length = 0;
/* XXX: len >= 0x80000000 won't work below because we need to be
* able to represent -len.
*/
len = duk__push_this_obj_len_u32_limited(ctx);
duk_push_array(ctx);
/* stack[0] = start
* stack[1] = end
* stack[2] = ToObject(this)
* stack[3] = ToUint32(length)
* stack[4] = result array
*/
start = duk_to_int_clamped(ctx, 0, -((duk_int_t) len), (duk_int_t) len);
if (start < 0) {
start = len + start;
}
/* XXX: could duk_is_undefined() provide defaulting undefined to 'len'
* (the upper limit)?
*/
if (duk_is_undefined(ctx, 1)) {
end = len;
} else {
end = duk_to_int_clamped(ctx, 1, -((duk_int_t) len), (duk_int_t) len);
if (end < 0) {
end = len + end;
}
}
DUK_ASSERT(start >= 0 && (duk_uint32_t) start <= len);
DUK_ASSERT(end >= 0 && (duk_uint32_t) end <= len);
idx = 0;
for (i = start; i < end; i++) {
DUK_ASSERT_TOP(ctx, 5);
if (duk_get_prop_index(ctx, 2, (duk_uarridx_t) i)) {
duk_xdef_prop_index_wec(ctx, 4, idx);
res_length = idx + 1;
} else {
duk_pop(ctx);
}
idx++;
DUK_ASSERT_TOP(ctx, 5);
}
duk_push_u32(ctx, res_length);
duk_xdef_prop_stridx(ctx, 4, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_W);
DUK_ASSERT_TOP(ctx, 5);
return 1;
}
/*
* shift()
*/
DUK_INTERNAL duk_ret_t duk_bi_array_prototype_shift(duk_context *ctx) {
duk_uint32_t len;
duk_uint32_t i;
len = duk__push_this_obj_len_u32(ctx);
if (len == 0) {
duk_push_int(ctx, 0);
duk_put_prop_stridx(ctx, 0, DUK_STRIDX_LENGTH);
return 0;
}
duk_get_prop_index(ctx, 0, 0);
/* stack[0] = object (this)
* stack[1] = ToUint32(length)
* stack[2] = elem at index 0 (retval)
*/
for (i = 1; i < len; i++) {
DUK_ASSERT_TOP(ctx, 3);
if (duk_get_prop_index(ctx, 0, (duk_uarridx_t) i)) {
/* fromPresent = true */
duk_put_prop_index(ctx, 0, (duk_uarridx_t) (i - 1));
} else {
/* fromPresent = false */
duk_del_prop_index(ctx, 0, (duk_uarridx_t) (i - 1));
duk_pop(ctx);
}
}
duk_del_prop_index(ctx, 0, (duk_uarridx_t) (len - 1));
duk_push_u32(ctx, (duk_uint32_t) (len - 1));
duk_put_prop_stridx(ctx, 0, DUK_STRIDX_LENGTH);
DUK_ASSERT_TOP(ctx, 3);
return 1;
}
/*
* unshift()
*/
DUK_INTERNAL duk_ret_t duk_bi_array_prototype_unshift(duk_context *ctx) {
duk_idx_t nargs;
duk_uint32_t len;
duk_uint32_t i;
nargs = duk_get_top(ctx);
len = duk__push_this_obj_len_u32(ctx);
/* stack[0...nargs-1] = unshift args (vararg)
* stack[nargs] = ToObject(this)
* stack[nargs+1] = ToUint32(length)
*/
DUK_ASSERT_TOP(ctx, nargs + 2);
/* Note: unshift() may operate on indices above unsigned 32-bit range
* and the final length may be >= 2**32. However, we restrict the
* final result to 32-bit range for practicality.
*/
if (len + (duk_uint32_t) nargs < len) {
DUK_D(DUK_DPRINT("Array.prototype.unshift() would go beyond 32-bit length, throw"));
return DUK_RET_RANGE_ERROR;
}
i = len;
while (i > 0) {
DUK_ASSERT_TOP(ctx, nargs + 2);
i--;
/* k+argCount-1; note that may be above 32-bit range */
if (duk_get_prop_index(ctx, -2, (duk_uarridx_t) i)) {
/* fromPresent = true */
/* [ ... ToObject(this) ToUint32(length) val ] */
duk_put_prop_index(ctx, -3, (duk_uarridx_t) (i + nargs)); /* -> [ ... ToObject(this) ToUint32(length) ] */
} else {
/* fromPresent = false */
/* [ ... ToObject(this) ToUint32(length) val ] */
duk_pop(ctx);
duk_del_prop_index(ctx, -2, (duk_uarridx_t) (i + nargs)); /* -> [ ... ToObject(this) ToUint32(length) ] */
}
DUK_ASSERT_TOP(ctx, nargs + 2);
}
for (i = 0; i < (duk_uint32_t) nargs; i++) {
DUK_ASSERT_TOP(ctx, nargs + 2);
duk_dup(ctx, i); /* -> [ ... ToObject(this) ToUint32(length) arg[i] ] */
duk_put_prop_index(ctx, -3, (duk_uarridx_t) i);
DUK_ASSERT_TOP(ctx, nargs + 2);
}
DUK_ASSERT_TOP(ctx, nargs + 2);
duk_push_u32(ctx, len + nargs);
duk_dup_top(ctx); /* -> [ ... ToObject(this) ToUint32(length) final_len final_len ] */
duk_put_prop_stridx(ctx, -4, DUK_STRIDX_LENGTH);
return 1;
}
/*
* indexOf(), lastIndexOf()
*/
DUK_INTERNAL duk_ret_t duk_bi_array_prototype_indexof_shared(duk_context *ctx) {
duk_idx_t nargs;
duk_int_t i, len;
duk_int_t from_index;
duk_small_int_t idx_step = duk_get_current_magic(ctx); /* idx_step is +1 for indexOf, -1 for lastIndexOf */
/* lastIndexOf() needs to be a vararg function because we must distinguish
* between an undefined fromIndex and a "not given" fromIndex; indexOf() is
* made vararg for symmetry although it doesn't strictly need to be.
*/
nargs = duk_get_top(ctx);
duk_set_top(ctx, 2);
/* XXX: must be able to represent -len */
len = (duk_int_t) duk__push_this_obj_len_u32_limited(ctx);
if (len == 0) {
goto not_found;
}
/* Index clamping is a bit tricky, we must ensure that we'll only iterate
* through elements that exist and that the specific requirements from E5.1
* Sections 15.4.4.14 and 15.4.4.15 are fulfilled; especially:
*
* - indexOf: clamp to [-len,len], negative handling -> [0,len],
* if clamped result is len, for-loop bails out immediately
*
* - lastIndexOf: clamp to [-len-1, len-1], negative handling -> [-1, len-1],
* if clamped result is -1, for-loop bails out immediately
*
* If fromIndex is not given, ToInteger(undefined) = 0, which is correct
* for indexOf() but incorrect for lastIndexOf(). Hence special handling,
* and why lastIndexOf() needs to be a vararg function.
*/
if (nargs >= 2) {
/* indexOf: clamp fromIndex to [-len, len]
* (if fromIndex == len, for-loop terminates directly)
*
* lastIndexOf: clamp fromIndex to [-len - 1, len - 1]
* (if clamped to -len-1 -> fromIndex becomes -1, terminates for-loop directly)
*/
from_index = duk_to_int_clamped(ctx,
1,
(idx_step > 0 ? -len : -len - 1),
(idx_step > 0 ? len : len - 1));
if (from_index < 0) {
/* for lastIndexOf, result may be -1 (mark immediate termination) */
from_index = len + from_index;
}
} else {
/* for indexOf, ToInteger(undefined) would be 0, i.e. correct, but
* handle both indexOf and lastIndexOf specially here.
*/
if (idx_step > 0) {
from_index = 0;
} else {
from_index = len - 1;
}
}
/* stack[0] = searchElement
* stack[1] = fromIndex
* stack[2] = object
* stack[3] = length (not needed, but not popped above)
*/
for (i = from_index; i >= 0 && i < len; i += idx_step) {
DUK_ASSERT_TOP(ctx, 4);
if (duk_get_prop_index(ctx, 2, (duk_uarridx_t) i)) {
DUK_ASSERT_TOP(ctx, 5);
if (duk_strict_equals(ctx, 0, 4)) {
duk_push_int(ctx, i);
return 1;
}
}
duk_pop(ctx);
}
not_found:
duk_push_int(ctx, -1);
return 1;
}
/*
* every(), some(), forEach(), map(), filter()
*/
#define DUK__ITER_EVERY 0
#define DUK__ITER_SOME 1
#define DUK__ITER_FOREACH 2
#define DUK__ITER_MAP 3
#define DUK__ITER_FILTER 4
/* XXX: This helper is a bit awkward because the handling for the different iteration
* callers is quite different. This now compiles to a bit less than 500 bytes, so with
* 5 callers the net result is about 100 bytes / caller.
*/
DUK_INTERNAL duk_ret_t duk_bi_array_prototype_iter_shared(duk_context *ctx) {
duk_uint32_t len;
duk_uint32_t i;
duk_uarridx_t k;
duk_bool_t bval;
duk_small_int_t iter_type = duk_get_current_magic(ctx);
duk_uint32_t res_length = 0;
/* each call this helper serves has nargs==2 */
DUK_ASSERT_TOP(ctx, 2);
len = duk__push_this_obj_len_u32(ctx);
duk_require_callable(ctx, 0);
/* if thisArg not supplied, behave as if undefined was supplied */
if (iter_type == DUK__ITER_MAP || iter_type == DUK__ITER_FILTER) {
duk_push_array(ctx);
} else {
duk_push_undefined(ctx);
}
/* stack[0] = callback
* stack[1] = thisArg
* stack[2] = object
* stack[3] = ToUint32(length) (unused, but avoid unnecessary pop)
* stack[4] = result array (or undefined)
*/
k = 0; /* result index for filter() */
for (i = 0; i < len; i++) {
DUK_ASSERT_TOP(ctx, 5);
if (!duk_get_prop_index(ctx, 2, (duk_uarridx_t) i)) {
#if defined(DUK_USE_NONSTD_ARRAY_MAP_TRAILER)
/* Real world behavior for map(): trailing non-existent
* elements don't invoke the user callback, but are still
* counted towards result 'length'.
*/
if (iter_type == DUK__ITER_MAP) {
res_length = i + 1;
}
#else
/* Standard behavior for map(): trailing non-existent
* elements don't invoke the user callback and are not
* counted towards result 'length'.
*/
#endif
duk_pop(ctx);
continue;
}
/* The original value needs to be preserved for filter(), hence
* this funny order. We can't re-get the value because of side
* effects.
*/
duk_dup(ctx, 0);
duk_dup(ctx, 1);
duk_dup(ctx, -3);
duk_push_u32(ctx, i);
duk_dup(ctx, 2); /* [ ... val callback thisArg val i obj ] */
duk_call_method(ctx, 3); /* -> [ ... val retval ] */
switch (iter_type) {
case DUK__ITER_EVERY:
bval = duk_to_boolean(ctx, -1);
if (!bval) {
/* stack top contains 'false' */
return 1;
}
break;
case DUK__ITER_SOME:
bval = duk_to_boolean(ctx, -1);
if (bval) {
/* stack top contains 'true' */
return 1;
}
break;
case DUK__ITER_FOREACH:
/* nop */
break;
case DUK__ITER_MAP:
duk_dup(ctx, -1);
duk_xdef_prop_index_wec(ctx, 4, (duk_uarridx_t) i); /* retval to result[i] */
res_length = i + 1;
break;
case DUK__ITER_FILTER:
bval = duk_to_boolean(ctx, -1);
if (bval) {
duk_dup(ctx, -2); /* orig value */
duk_xdef_prop_index_wec(ctx, 4, (duk_uarridx_t) k);
k++;
res_length = k;
}
break;
default:
DUK_UNREACHABLE();
break;
}
duk_pop_2(ctx);
DUK_ASSERT_TOP(ctx, 5);
}
switch (iter_type) {
case DUK__ITER_EVERY:
duk_push_true(ctx);
break;
case DUK__ITER_SOME:
duk_push_false(ctx);
break;
case DUK__ITER_FOREACH:
duk_push_undefined(ctx);
break;
case DUK__ITER_MAP:
case DUK__ITER_FILTER:
DUK_ASSERT_TOP(ctx, 5);
DUK_ASSERT(duk_is_array(ctx, -1)); /* topmost element is the result array already */
duk_push_u32(ctx, res_length);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_W);
break;
default:
DUK_UNREACHABLE();
break;
}
return 1;
}
/*
* reduce(), reduceRight()
*/
DUK_INTERNAL duk_ret_t duk_bi_array_prototype_reduce_shared(duk_context *ctx) {
duk_idx_t nargs;
duk_bool_t have_acc;
duk_uint32_t i, len;
duk_small_int_t idx_step = duk_get_current_magic(ctx); /* idx_step is +1 for reduce, -1 for reduceRight */
/* We're a varargs function because we need to detect whether
* initialValue was given or not.
*/
nargs = duk_get_top(ctx);
DUK_DDD(DUK_DDDPRINT("nargs=%ld", (long) nargs));
duk_set_top(ctx, 2);
len = duk__push_this_obj_len_u32(ctx);
if (!duk_is_callable(ctx, 0)) {
goto type_error;
}
/* stack[0] = callback fn
* stack[1] = initialValue
* stack[2] = object (coerced this)
* stack[3] = length (not needed, but not popped above)
* stack[4] = accumulator
*/
have_acc = 0;
if (nargs >= 2) {
duk_dup(ctx, 1);
have_acc = 1;
}
DUK_DDD(DUK_DDDPRINT("have_acc=%ld, acc=%!T",
(long) have_acc, (duk_tval *) duk_get_tval(ctx, 3)));
/* For len == 0, i is initialized to len - 1 which underflows.
* The condition (i < len) will then exit the for-loop on the
* first round which is correct. Similarly, loop termination
* happens by i underflowing.
*/
for (i = (idx_step >= 0 ? 0 : len - 1);
i < len; /* i >= 0 would always be true */
i += idx_step) {
DUK_DDD(DUK_DDDPRINT("i=%ld, len=%ld, have_acc=%ld, top=%ld, acc=%!T",
(long) i, (long) len, (long) have_acc,
(long) duk_get_top(ctx),
(duk_tval *) duk_get_tval(ctx, 4)));
DUK_ASSERT((have_acc && duk_get_top(ctx) == 5) ||
(!have_acc && duk_get_top(ctx) == 4));
if (!duk_has_prop_index(ctx, 2, (duk_uarridx_t) i)) {
continue;
}
if (!have_acc) {
DUK_ASSERT_TOP(ctx, 4);
duk_get_prop_index(ctx, 2, (duk_uarridx_t) i);
have_acc = 1;
DUK_ASSERT_TOP(ctx, 5);
} else {
DUK_ASSERT_TOP(ctx, 5);
duk_dup(ctx, 0);
duk_dup(ctx, 4);
duk_get_prop_index(ctx, 2, (duk_uarridx_t) i);
duk_push_u32(ctx, i);
duk_dup(ctx, 2);
DUK_DDD(DUK_DDDPRINT("calling reduce function: func=%!T, prev=%!T, curr=%!T, idx=%!T, obj=%!T",
(duk_tval *) duk_get_tval(ctx, -5), (duk_tval *) duk_get_tval(ctx, -4),
(duk_tval *) duk_get_tval(ctx, -3), (duk_tval *) duk_get_tval(ctx, -2),
(duk_tval *) duk_get_tval(ctx, -1)));
duk_call(ctx, 4);
DUK_DDD(DUK_DDDPRINT("-> result: %!T", (duk_tval *) duk_get_tval(ctx, -1)));
duk_replace(ctx, 4);
DUK_ASSERT_TOP(ctx, 5);
}
}
if (!have_acc) {
goto type_error;
}
DUK_ASSERT_TOP(ctx, 5);
return 1;
type_error:
return DUK_RET_TYPE_ERROR;
}
#undef DUK__ARRAY_MID_JOIN_LIMIT
#undef DUK__ITER_EVERY
#undef DUK__ITER_SOME
#undef DUK__ITER_FOREACH
#undef DUK__ITER_MAP
#undef DUK__ITER_FILTER
#line 1 "duk_bi_boolean.c"
/*
* Boolean built-ins
*/
/* include removed: duk_internal.h */
/* Shared helper to provide toString() and valueOf(). Checks 'this', gets
* the primitive value to stack top, and optionally coerces with ToString().
*/
DUK_INTERNAL duk_ret_t duk_bi_boolean_prototype_tostring_shared(duk_context *ctx) {
duk_tval *tv;
duk_hobject *h;
duk_small_int_t coerce_tostring = duk_get_current_magic(ctx);
/* XXX: there is room to use a shared helper here, many built-ins
* check the 'this' type, and if it's an object, check its class,
* then get its internal value, etc.
*/
duk_push_this(ctx);
tv = duk_get_tval(ctx, -1);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_BOOLEAN(tv)) {
goto type_ok;
} else if (DUK_TVAL_IS_OBJECT(tv)) {
h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
if (DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_BOOLEAN) {
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_VALUE);
DUK_ASSERT(duk_is_boolean(ctx, -1));
goto type_ok;
}
}
return DUK_RET_TYPE_ERROR;
type_ok:
if (coerce_tostring) {
duk_to_string(ctx, -1);
}
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_boolean_constructor(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h_this;
DUK_UNREF(thr);
duk_to_boolean(ctx, 0);
if (duk_is_constructor_call(ctx)) {
/* XXX: helper; rely on Boolean.prototype as being non-writable, non-configurable */
duk_push_this(ctx);
h_this = duk_get_hobject(ctx, -1);
DUK_ASSERT(h_this != NULL);
DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h_this) == thr->builtins[DUK_BIDX_BOOLEAN_PROTOTYPE]);
DUK_HOBJECT_SET_CLASS_NUMBER(h_this, DUK_HOBJECT_CLASS_BOOLEAN);
duk_dup(ctx, 0); /* -> [ val obj val ] */
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE); /* XXX: proper flags? */
} /* unbalanced stack */
return 1;
}
#line 1 "duk_bi_buffer.c"
/*
* Duktape.Buffer, Node.js Buffer, and Khronos/ES6 TypedArray built-ins
*/
/* include removed: duk_internal.h */
/*
* Misc helpers
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
/* Map DUK_HBUFFEROBJECT_ELEM_xxx to duk_hobject class number.
* Sync with duk_hbufferobject.h and duk_hobject.h.
*/
static const duk_uint8_t duk__buffer_class_from_elemtype[9] = {
DUK_HOBJECT_CLASS_UINT8ARRAY,
DUK_HOBJECT_CLASS_UINT8CLAMPEDARRAY,
DUK_HOBJECT_CLASS_INT8ARRAY,
DUK_HOBJECT_CLASS_UINT16ARRAY,
DUK_HOBJECT_CLASS_INT16ARRAY,
DUK_HOBJECT_CLASS_UINT32ARRAY,
DUK_HOBJECT_CLASS_INT32ARRAY,
DUK_HOBJECT_CLASS_FLOAT32ARRAY,
DUK_HOBJECT_CLASS_FLOAT64ARRAY
};
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
/* Map DUK_HBUFFEROBJECT_ELEM_xxx to prototype object built-in index.
* Sync with duk_hbufferobject.h.
*/
static const duk_uint8_t duk__buffer_proto_from_elemtype[9] = {
DUK_BIDX_UINT8ARRAY_PROTOTYPE,
DUK_BIDX_UINT8CLAMPEDARRAY_PROTOTYPE,
DUK_BIDX_INT8ARRAY_PROTOTYPE,
DUK_BIDX_UINT16ARRAY_PROTOTYPE,
DUK_BIDX_INT16ARRAY_PROTOTYPE,
DUK_BIDX_UINT32ARRAY_PROTOTYPE,
DUK_BIDX_INT32ARRAY_PROTOTYPE,
DUK_BIDX_FLOAT32ARRAY_PROTOTYPE,
DUK_BIDX_FLOAT64ARRAY_PROTOTYPE
};
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
/* Map DUK__FLX_xxx to byte size.
*/
static const duk_uint8_t duk__buffer_nbytes_from_fldtype[6] = {
1, /* DUK__FLD_8BIT */
2, /* DUK__FLD_16BIT */
4, /* DUK__FLD_32BIT */
4, /* DUK__FLD_FLOAT */
8, /* DUK__FLD_DOUBLE */
0 /* DUK__FLD_VARINT; not relevant here */
};
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
/* Bitfield for each DUK_HBUFFEROBJECT_ELEM_xxx indicating which element types
* are compatible with a blind byte copy for the TypedArray set() method (also
* used for TypedArray constructor). Array index is target buffer elem type,
* bitfield indicates compatible source types. The types must have same byte
* size and they must be coercion compatible.
*/
static duk_uint16_t duk__buffer_elemtype_copy_compatible[9] = {
/* xxx -> DUK_HBUFFEROBJECT_ELEM_UINT8 */
(1U << DUK_HBUFFEROBJECT_ELEM_UINT8) |
(1U << DUK_HBUFFEROBJECT_ELEM_UINT8CLAMPED) |
(1U << DUK_HBUFFEROBJECT_ELEM_INT8),
/* xxx -> DUK_HBUFFEROBJECT_ELEM_UINT8CLAMPED
* Note: INT8 is -not- copy compatible, e.g. -1 would coerce to 0x00.
*/
(1U << DUK_HBUFFEROBJECT_ELEM_UINT8) |
(1U << DUK_HBUFFEROBJECT_ELEM_UINT8CLAMPED),
/* xxx -> DUK_HBUFFEROBJECT_ELEM_INT8 */
(1U << DUK_HBUFFEROBJECT_ELEM_UINT8) |
(1U << DUK_HBUFFEROBJECT_ELEM_UINT8CLAMPED) |
(1U << DUK_HBUFFEROBJECT_ELEM_INT8),
/* xxx -> DUK_HBUFFEROBJECT_ELEM_UINT16 */
(1U << DUK_HBUFFEROBJECT_ELEM_UINT16) |
(1U << DUK_HBUFFEROBJECT_ELEM_INT16),
/* xxx -> DUK_HBUFFEROBJECT_ELEM_INT16 */
(1U << DUK_HBUFFEROBJECT_ELEM_UINT16) |
(1U << DUK_HBUFFEROBJECT_ELEM_INT16),
/* xxx -> DUK_HBUFFEROBJECT_ELEM_UINT32 */
(1U << DUK_HBUFFEROBJECT_ELEM_UINT32) |
(1U << DUK_HBUFFEROBJECT_ELEM_INT32),
/* xxx -> DUK_HBUFFEROBJECT_ELEM_INT32 */
(1U << DUK_HBUFFEROBJECT_ELEM_UINT32) |
(1U << DUK_HBUFFEROBJECT_ELEM_INT32),
/* xxx -> DUK_HBUFFEROBJECT_ELEM_FLOAT32 */
(1U << DUK_HBUFFEROBJECT_ELEM_FLOAT32),
/* xxx -> DUK_HBUFFEROBJECT_ELEM_FLOAT64 */
(1U << DUK_HBUFFEROBJECT_ELEM_FLOAT64)
};
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
/* Shared helper. */
DUK_LOCAL duk_hbufferobject *duk__getrequire_bufobj_this(duk_context *ctx, duk_bool_t throw_flag) {
duk_hthread *thr;
duk_tval *tv;
duk_hbufferobject *h_this;
DUK_ASSERT(ctx != NULL);
thr = (duk_hthread *) ctx;
tv = duk_get_borrowed_this_tval(ctx);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_OBJECT(tv)) {
h_this = (duk_hbufferobject *) DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h_this != NULL);
if (DUK_HOBJECT_IS_BUFFEROBJECT((duk_hobject *) h_this)) {
DUK_ASSERT_HBUFFEROBJECT_VALID(h_this);
return h_this;
}
}
if (throw_flag) {
DUK_ERROR_TYPE(thr, DUK_STR_NOT_BUFFER);
}
return NULL;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
/* Check that 'this' is a duk_hbufferobject and return a pointer to it. */
DUK_LOCAL duk_hbufferobject *duk__get_bufobj_this(duk_context *ctx) {
return duk__getrequire_bufobj_this(ctx, 0);
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
/* Check that 'this' is a duk_hbufferobject and return a pointer to it
* (NULL if not).
*/
DUK_LOCAL duk_hbufferobject *duk__require_bufobj_this(duk_context *ctx) {
return duk__getrequire_bufobj_this(ctx, 1);
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
/* Check that value is a duk_hbufferobject and return a pointer to it. */
DUK_LOCAL duk_hbufferobject *duk__require_bufobj_value(duk_context *ctx, duk_idx_t index) {
duk_hthread *thr;
duk_tval *tv;
duk_hbufferobject *h_obj;
thr = (duk_hthread *) ctx;
/* Don't accept relative indices now. */
DUK_ASSERT(index >= 0);
tv = duk_require_tval(ctx, index);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_OBJECT(tv)) {
h_obj = (duk_hbufferobject *) DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h_obj != NULL);
if (DUK_HOBJECT_IS_BUFFEROBJECT((duk_hobject *) h_obj)) {
DUK_ASSERT_HBUFFEROBJECT_VALID(h_obj);
return h_obj;
}
}
DUK_ERROR_TYPE(thr, DUK_STR_NOT_BUFFER);
return NULL; /* not reachable */
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_LOCAL void duk__set_bufobj_buffer(duk_context *ctx, duk_hbufferobject *h_bufobj, duk_hbuffer *h_val) {
duk_hthread *thr;
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(h_bufobj != NULL);
DUK_ASSERT(h_bufobj->buf == NULL); /* no need to decref */
DUK_ASSERT(h_val != NULL);
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
h_bufobj->buf = h_val;
DUK_HBUFFER_INCREF(thr, h_val);
h_bufobj->length = (duk_uint_t) DUK_HBUFFER_GET_SIZE(h_val);
DUK_ASSERT(h_bufobj->shift == 0);
DUK_ASSERT(h_bufobj->elem_type == DUK_HBUFFEROBJECT_ELEM_UINT8);
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
}
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_LOCAL duk_hbufferobject *duk__push_arraybuffer_with_length(duk_context *ctx, duk_uint_t len) {
duk_hbuffer *h_val;
duk_hbufferobject *h_bufobj;
(void) duk_push_fixed_buffer(ctx, (duk_size_t) len);
h_val = (duk_hbuffer *) duk_get_hbuffer(ctx, -1);
DUK_ASSERT(h_val != NULL);
h_bufobj = duk_push_bufferobject_raw(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_BUFFEROBJECT |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_ARRAYBUFFER),
DUK_BIDX_ARRAYBUFFER_PROTOTYPE);
DUK_ASSERT(h_bufobj != NULL);
duk__set_bufobj_buffer(ctx, h_bufobj, h_val);
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
return h_bufobj;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
/* Shared offset/length coercion helper. */
DUK_LOCAL void duk__resolve_offset_opt_length(duk_context *ctx,
duk_hbufferobject *h_bufarg,
duk_idx_t idx_offset,
duk_idx_t idx_length,
duk_uint_t *out_offset,
duk_uint_t *out_length,
duk_bool_t throw_flag) {
duk_hthread *thr;
duk_int_t offset_signed;
duk_int_t length_signed;
duk_uint_t offset;
duk_uint_t length;
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
offset_signed = duk_to_int(ctx, idx_offset);
if (offset_signed < 0) {
goto fail_range;
}
offset = (duk_uint_t) offset_signed;
if (offset > h_bufarg->length) {
goto fail_range;
}
DUK_ASSERT_DISABLE(offset >= 0); /* unsigned */
DUK_ASSERT(offset <= h_bufarg->length);
if (duk_is_undefined(ctx, idx_length)) {
DUK_ASSERT(h_bufarg->length >= offset);
length = h_bufarg->length - offset; /* >= 0 */
} else {
length_signed = duk_to_int(ctx, idx_length);
if (length_signed < 0) {
goto fail_range;
}
length = (duk_uint_t) length_signed;
DUK_ASSERT(h_bufarg->length >= offset);
if (length > h_bufarg->length - offset) {
/* Unlike for negative arguments, some call sites
* want length to be clamped if it's positive.
*/
if (throw_flag) {
goto fail_range;
} else {
length = h_bufarg->length - offset;
}
}
}
DUK_ASSERT_DISABLE(length >= 0); /* unsigned */
DUK_ASSERT(offset + length <= h_bufarg->length);
*out_offset = offset;
*out_length = length;
return;
fail_range:
DUK_ERROR_RANGE(thr, DUK_STR_INVALID_CALL_ARGS);
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
/* Shared lenient buffer length clamping helper. No negative indices, no
* element/byte shifting.
*/
DUK_LOCAL void duk__clamp_startend_nonegidx_noshift(duk_context *ctx,
duk_hbufferobject *h_bufobj,
duk_idx_t idx_start,
duk_idx_t idx_end,
duk_int_t *out_start_offset,
duk_int_t *out_end_offset) {
duk_int_t buffer_length;
duk_int_t start_offset;
duk_int_t end_offset;
DUK_ASSERT(out_start_offset != NULL);
DUK_ASSERT(out_end_offset != NULL);
buffer_length = (duk_int_t) h_bufobj->length;
/* undefined coerces to zero which is correct */
start_offset = duk_to_int_clamped(ctx, idx_start, 0, buffer_length);
if (duk_is_undefined(ctx, idx_end)) {
end_offset = buffer_length;
} else {
end_offset = duk_to_int_clamped(ctx, idx_end, start_offset, buffer_length);
}
DUK_ASSERT(start_offset >= 0);
DUK_ASSERT(start_offset <= buffer_length);
DUK_ASSERT(end_offset >= 0);
DUK_ASSERT(end_offset <= buffer_length);
DUK_ASSERT(start_offset <= end_offset);
*out_start_offset = start_offset;
*out_end_offset = end_offset;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
/* Shared lenient buffer length clamping helper. Indices are treated as
* element indices (though output values are byte offsets) which only
* really matters for TypedArray views as other buffer object have a zero
* shift. Negative indices are counted from end of input slice; crossed
* indices are clamped to zero length; and final indices are clamped
* against input slice. Used for e.g. ArrayBuffer slice().
*/
DUK_LOCAL void duk__clamp_startend_negidx_shifted(duk_context *ctx,
duk_hbufferobject *h_bufobj,
duk_idx_t idx_start,
duk_idx_t idx_end,
duk_int_t *out_start_offset,
duk_int_t *out_end_offset) {
duk_int_t buffer_length;
duk_int_t start_offset;
duk_int_t end_offset;
DUK_ASSERT(out_start_offset != NULL);
DUK_ASSERT(out_end_offset != NULL);
buffer_length = (duk_int_t) h_bufobj->length;
buffer_length >>= h_bufobj->shift; /* as elements */
/* Resolve start/end offset as element indices first; arguments
* at idx_start/idx_end are element offsets. Working with element
* indices first also avoids potential for wrapping.
*/
start_offset = duk_to_int(ctx, idx_start);
if (start_offset < 0) {
start_offset = buffer_length + start_offset;
}
if (duk_is_undefined(ctx, idx_end)) {
end_offset = buffer_length;
} else {
end_offset = duk_to_int(ctx, idx_end);
if (end_offset < 0) {
end_offset = buffer_length + end_offset;
}
}
/* Note: start_offset/end_offset can still be < 0 here. */
if (start_offset < 0) {
start_offset = 0;
} else if (start_offset > buffer_length) {
start_offset = buffer_length;
}
if (end_offset < start_offset) {
end_offset = start_offset;
} else if (end_offset > buffer_length) {
end_offset = buffer_length;
}
DUK_ASSERT(start_offset >= 0);
DUK_ASSERT(start_offset <= buffer_length);
DUK_ASSERT(end_offset >= 0);
DUK_ASSERT(end_offset <= buffer_length);
DUK_ASSERT(start_offset <= end_offset);
/* Convert indices to byte offsets. */
start_offset <<= h_bufobj->shift;
end_offset <<= h_bufobj->shift;
*out_start_offset = start_offset;
*out_end_offset = end_offset;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
/*
* Indexed read/write helpers (also used from outside this file)
*/
DUK_INTERNAL void duk_hbufferobject_push_validated_read(duk_context *ctx, duk_hbufferobject *h_bufobj, duk_uint8_t *p, duk_small_uint_t elem_size) {
duk_double_union du;
DUK_MEMCPY((void *) du.uc, (const void *) p, (size_t) elem_size);
switch (h_bufobj->elem_type) {
case DUK_HBUFFEROBJECT_ELEM_UINT8:
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
case DUK_HBUFFEROBJECT_ELEM_UINT8CLAMPED:
#endif
duk_push_uint(ctx, (duk_uint_t) du.uc[0]);
break;
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
/* These are not needed when only Duktape.Buffer is supported. */
case DUK_HBUFFEROBJECT_ELEM_INT8:
duk_push_int(ctx, (duk_int_t) (duk_int8_t) du.uc[0]);
break;
case DUK_HBUFFEROBJECT_ELEM_UINT16:
duk_push_uint(ctx, (duk_uint_t) du.us[0]);
break;
case DUK_HBUFFEROBJECT_ELEM_INT16:
duk_push_int(ctx, (duk_int_t) (duk_int16_t) du.us[0]);
break;
case DUK_HBUFFEROBJECT_ELEM_UINT32:
duk_push_uint(ctx, (duk_uint_t) du.ui[0]);
break;
case DUK_HBUFFEROBJECT_ELEM_INT32:
duk_push_int(ctx, (duk_int_t) (duk_int32_t) du.ui[0]);
break;
case DUK_HBUFFEROBJECT_ELEM_FLOAT32:
duk_push_number(ctx, (duk_double_t) du.f[0]);
break;
case DUK_HBUFFEROBJECT_ELEM_FLOAT64:
duk_push_number(ctx, (duk_double_t) du.d);
break;
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
default:
DUK_UNREACHABLE();
}
}
DUK_INTERNAL void duk_hbufferobject_validated_write(duk_context *ctx, duk_hbufferobject *h_bufobj, duk_uint8_t *p, duk_small_uint_t elem_size) {
duk_double_union du;
/* NOTE! Caller must ensure that any side effects from the
* coercions below are safe. If that cannot be guaranteed
* (which is normally the case), caller must coerce the
* argument using duk_to_number() before any pointer
* validations; the result of duk_to_number() always coerces
* without side effects here.
*/
switch (h_bufobj->elem_type) {
case DUK_HBUFFEROBJECT_ELEM_UINT8:
du.uc[0] = (duk_uint8_t) duk_to_uint32(ctx, -1);
break;
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
/* These are not needed when only Duktape.Buffer is supported. */
case DUK_HBUFFEROBJECT_ELEM_UINT8CLAMPED:
du.uc[0] = (duk_uint8_t) duk_to_uint8clamped(ctx, -1);
break;
case DUK_HBUFFEROBJECT_ELEM_INT8:
du.uc[0] = (duk_uint8_t) duk_to_int32(ctx, -1);
break;
case DUK_HBUFFEROBJECT_ELEM_UINT16:
du.us[0] = (duk_uint16_t) duk_to_uint32(ctx, -1);
break;
case DUK_HBUFFEROBJECT_ELEM_INT16:
du.us[0] = (duk_uint16_t) duk_to_int32(ctx, -1);
break;
case DUK_HBUFFEROBJECT_ELEM_UINT32:
du.ui[0] = (duk_uint32_t) duk_to_uint32(ctx, -1);
break;
case DUK_HBUFFEROBJECT_ELEM_INT32:
du.ui[0] = (duk_uint32_t) duk_to_int32(ctx, -1);
break;
case DUK_HBUFFEROBJECT_ELEM_FLOAT32:
du.f[0] = (duk_float_t) duk_to_number(ctx, -1);
break;
case DUK_HBUFFEROBJECT_ELEM_FLOAT64:
du.d = (duk_double_t) duk_to_number(ctx, -1);
break;
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
default:
DUK_UNREACHABLE();
}
DUK_MEMCPY((void *) p, (const void *) du.uc, (size_t) elem_size);
}
/*
* Duktape.Buffer: constructor
*/
DUK_INTERNAL duk_ret_t duk_bi_buffer_constructor(duk_context *ctx) {
duk_hthread *thr;
duk_size_t buf_size;
duk_small_int_t buf_dynamic;
duk_uint8_t *buf_data;
const duk_uint8_t *src_data;
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
/*
* Constructor arguments are currently somewhat compatible with
* (keep it that way if possible):
*
* http://nodejs.org/api/buffer.html
*
* Note that the ToBuffer() coercion (duk_to_buffer()) does NOT match
* the constructor behavior.
*/
buf_dynamic = duk_get_boolean(ctx, 1); /* default to false */
switch (duk_get_type(ctx, 0)) {
case DUK_TYPE_NUMBER: {
/* new buffer of specified size */
buf_size = (duk_size_t) duk_to_int(ctx, 0);
(void) duk_push_buffer(ctx, buf_size, buf_dynamic);
break;
}
case DUK_TYPE_BUFFER: {
/* return input buffer, converted to a Duktape.Buffer object
* if called as a constructor (no change if called as a
* function).
*/
duk_set_top(ctx, 1);
break;
}
case DUK_TYPE_STRING: {
/* new buffer with string contents */
src_data = (const duk_uint8_t *) duk_get_lstring(ctx, 0, &buf_size);
DUK_ASSERT(src_data != NULL); /* even for zero-length string */
buf_data = (duk_uint8_t *) duk_push_buffer(ctx, buf_size, buf_dynamic);
DUK_MEMCPY((void *) buf_data, (const void *) src_data, (size_t) buf_size);
break;
}
case DUK_TYPE_OBJECT: {
/* For all duk_hbufferobjects, get the plain buffer inside
* without making a copy. This is compatible with Duktape 1.2
* but means that a slice/view information is ignored and the
* full underlying buffer is returned.
*
* If called as a constructor, a new Duktape.Buffer object
* pointing to the same plain buffer is created below.
*/
duk_hbufferobject *h_bufobj;
h_bufobj = (duk_hbufferobject *) duk_get_hobject(ctx, 0);
DUK_ASSERT(h_bufobj != NULL);
if (!DUK_HOBJECT_IS_BUFFEROBJECT((duk_hobject *) h_bufobj)) {
return DUK_RET_TYPE_ERROR;
}
if (h_bufobj->buf == NULL) {
return DUK_RET_TYPE_ERROR;
}
duk_push_hbuffer(ctx, h_bufobj->buf);
break;
}
case DUK_TYPE_NONE:
default: {
return DUK_RET_TYPE_ERROR;
}
}
DUK_ASSERT(duk_is_buffer(ctx, -1));
/* stack is unbalanced, but: [ <something> buf ] */
if (duk_is_constructor_call(ctx)) {
duk_hbufferobject *h_bufobj;
duk_hbuffer *h_val;
h_val = duk_get_hbuffer(ctx, -1);
DUK_ASSERT(h_val != NULL);
h_bufobj = duk_push_bufferobject_raw(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_BUFFEROBJECT |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_BUFFER),
DUK_BIDX_BUFFER_PROTOTYPE);
DUK_ASSERT(h_bufobj != NULL);
duk__set_bufobj_buffer(ctx, h_bufobj, h_val);
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
}
/* Note: unbalanced stack on purpose */
return 1;
}
/*
* Node.js Buffer: constructor
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_constructor(duk_context *ctx) {
/* Internal class is Object: Object.prototype.toString.call(new Buffer(0))
* prints "[object Object]".
*/
duk_int_t len;
duk_int_t i;
duk_hbuffer *h_buf;
duk_hbufferobject *h_bufobj;
duk_size_t buf_size;
switch (duk_get_type(ctx, 0)) {
case DUK_TYPE_BUFFER: {
/* Custom behavior: plain buffer is used as internal buffer
* without making a copy (matches Duktape.Buffer).
*/
duk_set_top(ctx, 1); /* -> [ buffer ] */
break;
}
case DUK_TYPE_NUMBER: {
len = duk_to_int_clamped(ctx, 0, 0, DUK_INT_MAX);
(void) duk_push_fixed_buffer(ctx, (duk_size_t) len);
break;
}
case DUK_TYPE_OBJECT: {
duk_uint8_t *buf;
(void) duk_get_prop_string(ctx, 0, "length");
len = duk_to_int_clamped(ctx, -1, 0, DUK_INT_MAX);
duk_pop(ctx);
buf = (duk_uint8_t *) duk_push_fixed_buffer(ctx, (duk_size_t) len);
for (i = 0; i < len; i++) {
/* XXX: fast path for array arguments? */
duk_get_prop_index(ctx, 0, (duk_uarridx_t) i);
buf[i] = (duk_uint8_t) (duk_to_uint32(ctx, -1) & 0xffU);
duk_pop(ctx);
}
break;
}
case DUK_TYPE_STRING: {
/* ignore encoding for now */
duk_dup(ctx, 0);
(void) duk_to_buffer(ctx, -1, &buf_size);
break;
}
default:
return DUK_RET_TYPE_ERROR;
}
DUK_ASSERT(duk_is_buffer(ctx, -1));
h_buf = duk_get_hbuffer(ctx, -1);
DUK_ASSERT(h_buf != NULL);
h_bufobj = duk_push_bufferobject_raw(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_BUFFEROBJECT |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_BUFFER),
DUK_BIDX_NODEJS_BUFFER_PROTOTYPE);
DUK_ASSERT(h_bufobj != NULL);
h_bufobj->buf = h_buf;
DUK_HBUFFER_INCREF(thr, h_buf);
DUK_ASSERT(h_bufobj->offset == 0);
h_bufobj->length = (duk_int_t) DUK_HBUFFER_GET_SIZE(h_buf);
DUK_ASSERT(h_bufobj->elem_type == DUK_HBUFFEROBJECT_ELEM_UINT8);
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
return 1;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_constructor(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
/*
* ArrayBuffer, DataView, and TypedArray constructors
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_ret_t duk_bi_arraybuffer_constructor(duk_context *ctx) {
duk_hthread *thr;
duk_hbufferobject *h_bufobj;
duk_hbuffer *h_val;
DUK_ASSERT_CTX_VALID(ctx);
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
/* XXX: function flag to make this automatic? */
if (!duk_is_constructor_call(ctx)) {
return DUK_RET_TYPE_ERROR;
}
if (duk_is_buffer(ctx, 0)) {
/* Custom behavior: plain buffer is used as internal buffer
* without making a copy (matches Duktape.Buffer).
*/
h_val = duk_get_hbuffer(ctx, 0);
DUK_ASSERT(h_val != NULL);
/* XXX: accept any duk_hbufferobject type as an input also? */
} else {
duk_int_t len;
len = duk_to_int(ctx, 0);
if (len < 0) {
goto fail_length;
}
(void) duk_push_fixed_buffer(ctx, (duk_size_t) len);
h_val = (duk_hbuffer *) duk_get_hbuffer(ctx, -1);
DUK_ASSERT(h_val != NULL);
#if !defined(DUK_USE_ZERO_BUFFER_DATA)
/* Khronos/ES6 requires zeroing even when DUK_USE_ZERO_BUFFER_DATA
* is not set.
*/
DUK_ASSERT(!DUK_HBUFFER_HAS_DYNAMIC((duk_hbuffer *) h_val));
DUK_MEMZERO((void *) DUK_HBUFFER_FIXED_GET_DATA_PTR(thr->heap, h_val), (duk_size_t) len);
#endif
}
h_bufobj = duk_push_bufferobject_raw(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_BUFFEROBJECT |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_ARRAYBUFFER),
DUK_BIDX_ARRAYBUFFER_PROTOTYPE);
DUK_ASSERT(h_bufobj != NULL);
duk__set_bufobj_buffer(ctx, h_bufobj, h_val);
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
return 1;
fail_length:
return DUK_RET_RANGE_ERROR;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_arraybuffer_constructor(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
/* Format of magic, bits:
* 0...1: elem size shift (0-3)
* 2...5: elem type (DUK_HBUFFEROBJECT_ELEM_xxx)
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_ret_t duk_bi_typedarray_constructor(duk_context *ctx) {
duk_hthread *thr;
duk_tval *tv;
duk_hobject *h_obj;
duk_hbufferobject *h_bufobj = NULL;
duk_hbufferobject *h_bufarr = NULL;
duk_hbufferobject *h_bufarg = NULL;
duk_hbuffer *h_val;
duk_small_uint_t magic;
duk_small_uint_t shift;
duk_small_uint_t elem_type;
duk_small_uint_t elem_size;
duk_small_uint_t class_num;
duk_small_uint_t proto_bidx;
duk_uint_t align_mask;
duk_uint_t elem_length;
duk_int_t elem_length_signed;
duk_uint_t byte_length;
duk_small_uint_t copy_mode;
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
/* XXX: function flag to make this automatic? */
if (!duk_is_constructor_call(ctx)) {
return DUK_RET_TYPE_ERROR;
}
/* We could fit built-in index into magic but that'd make the magic
* number dependent on built-in numbering (genbuiltins.py doesn't
* handle that yet). So map both class and prototype from the
* element type.
*/
magic = duk_get_current_magic(ctx);
shift = magic & 0x03; /* bits 0...1: shift */
elem_type = (magic >> 2) & 0x0f; /* bits 2...5: type */
elem_size = 1 << shift;
align_mask = elem_size - 1;
DUK_ASSERT(elem_type < sizeof(duk__buffer_proto_from_elemtype) / sizeof(duk_uint8_t));
proto_bidx = duk__buffer_proto_from_elemtype[elem_type];
DUK_ASSERT(proto_bidx < DUK_NUM_BUILTINS);
DUK_ASSERT(elem_type < sizeof(duk__buffer_class_from_elemtype) / sizeof(duk_uint8_t));
class_num = duk__buffer_class_from_elemtype[elem_type];
DUK_DD(DUK_DDPRINT("typedarray constructor, magic=%d, shift=%d, elem_type=%d, "
"elem_size=%d, proto_bidx=%d, class_num=%d",
(int) magic, (int) shift, (int) elem_type, (int) elem_size,
(int) proto_bidx, (int) class_num));
/* Argument variants. When the argument is an ArrayBuffer a view to
* the same buffer is created; otherwise a new ArrayBuffer is always
* created.
*/
tv = duk_get_tval(ctx, 0);
DUK_ASSERT(tv != NULL); /* arg count */
if (DUK_TVAL_IS_OBJECT(tv)) {
h_obj = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h_obj != NULL);
if (DUK_HOBJECT_GET_CLASS_NUMBER(h_obj) == DUK_HOBJECT_CLASS_ARRAYBUFFER) {
/* ArrayBuffer: unlike any other argument variant, create
* a view into the existing buffer.
*/
duk_int_t byte_offset_signed;
duk_uint_t byte_offset;
h_bufarg = (duk_hbufferobject *) h_obj;
byte_offset_signed = duk_to_int(ctx, 1);
if (byte_offset_signed < 0) {
goto fail_arguments;
}
byte_offset = (duk_uint_t) byte_offset_signed;
if (byte_offset > h_bufarg->length ||
(byte_offset & align_mask) != 0) {
/* Must be >= 0 and multiple of element size. */
goto fail_arguments;
}
if (duk_is_undefined(ctx, 2)) {
DUK_ASSERT(h_bufarg->length >= byte_offset);
byte_length = h_bufarg->length - byte_offset;
if ((byte_length & align_mask) != 0) {
/* Must be element size multiple from
* start offset to end of buffer.
*/
goto fail_arguments;
}
elem_length = (byte_length >> shift);
} else {
elem_length_signed = duk_to_int(ctx, 2);
if (elem_length_signed < 0) {
goto fail_arguments;
}
elem_length = (duk_uint_t) elem_length_signed;
byte_length = elem_length << shift;
if ((byte_length >> shift) != elem_length) {
/* Byte length would overflow. */
/* XXX: easier check with less code? */
goto fail_arguments;
}
DUK_ASSERT(h_bufarg->length >= byte_offset);
if (byte_length > h_bufarg->length - byte_offset) {
/* Not enough data. */
goto fail_arguments;
}
}
DUK_UNREF(elem_length);
DUK_ASSERT_DISABLE(byte_offset >= 0);
DUK_ASSERT(byte_offset <= h_bufarg->length);
DUK_ASSERT_DISABLE(byte_length >= 0);
DUK_ASSERT(byte_offset + byte_length <= h_bufarg->length);
DUK_ASSERT((elem_length << shift) == byte_length);
h_bufobj = duk_push_bufferobject_raw(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_BUFFEROBJECT |
DUK_HOBJECT_CLASS_AS_FLAGS(class_num),
proto_bidx);
h_val = h_bufarg->buf;
if (h_val == NULL) {
return DUK_RET_TYPE_ERROR;
}
h_bufobj->buf = h_val;
DUK_HBUFFER_INCREF(thr, h_val);
h_bufobj->offset = h_bufarg->offset + byte_offset;
h_bufobj->length = byte_length;
h_bufobj->shift = (duk_uint8_t) shift;
h_bufobj->elem_type = (duk_uint8_t) elem_type;
h_bufobj->is_view = 1;
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
/* Set .buffer to the argument ArrayBuffer. */
duk_dup(ctx, 0);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_LC_BUFFER, DUK_PROPDESC_FLAGS_NONE);
duk_compact(ctx, -1);
return 1;
} else if (DUK_HOBJECT_IS_BUFFEROBJECT(h_obj)) {
/* TypedArray (or other non-ArrayBuffer duk_hbufferobject).
* Conceptually same behavior as for an Array-like argument,
* with a few fast paths.
*/
h_bufarg = (duk_hbufferobject *) h_obj;
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufarg);
elem_length_signed = (duk_int_t) (h_bufarg->length >> h_bufarg->shift);
if (h_bufarg->buf == NULL) {
return DUK_RET_TYPE_ERROR;
}
/* Select copy mode. Must take into account element
* compatibility and validity of the underlying source
* buffer.
*/
DUK_DDD(DUK_DDDPRINT("selecting copy mode for bufobj arg, "
"src byte_length=%ld, src shift=%d, "
"src/dst elem_length=%ld; "
"dst shift=%d -> dst byte_length=%ld",
(long) h_bufarg->length, (int) h_bufarg->shift,
(long) elem_length_signed, (int) shift,
(long) (elem_length_signed << shift)));
copy_mode = 2; /* default is explicit index read/write copy */
DUK_ASSERT(elem_type < sizeof(duk__buffer_elemtype_copy_compatible) / sizeof(duk_uint16_t));
if (DUK_HBUFFEROBJECT_VALID_SLICE(h_bufarg)) {
if ((duk__buffer_elemtype_copy_compatible[elem_type] & (1 << h_bufarg->elem_type)) != 0) {
DUK_DDD(DUK_DDDPRINT("source/target are copy compatible, memcpy"));
DUK_ASSERT(shift == h_bufarg->shift); /* byte sizes will match */
copy_mode = 0;
} else {
DUK_DDD(DUK_DDDPRINT("source/target not copy compatible but valid, fast copy"));
copy_mode = 1;
}
}
} else {
/* Array or Array-like */
elem_length_signed = (duk_int_t) duk_get_length(ctx, 0);
copy_mode = 2;
}
} else if (DUK_TVAL_IS_BUFFER(tv)) {
/* Accept plain buffer values like array initializers
* (new in Duktape 1.4.0).
*/
duk_hbuffer *h_srcbuf;
h_srcbuf = DUK_TVAL_GET_BUFFER(tv);
elem_length_signed = (duk_int_t) DUK_HBUFFER_GET_SIZE(h_srcbuf);
copy_mode = 2; /* XXX: could add fast path for u8 compatible views */
} else {
/* Non-object argument is simply int coerced, matches
* V8 behavior (except for "null", which we coerce to
* 0 but V8 TypeErrors).
*/
elem_length_signed = duk_to_int(ctx, 0);
copy_mode = 3;
}
if (elem_length_signed < 0) {
goto fail_arguments;
}
elem_length = (duk_uint_t) elem_length_signed;
byte_length = (duk_uint_t) (elem_length << shift);
if ((byte_length >> shift) != elem_length) {
/* Byte length would overflow. */
/* XXX: easier check with less code? */
goto fail_arguments;
}
DUK_DDD(DUK_DDDPRINT("elem_length=%ld, byte_length=%ld",
(long) elem_length, (long) byte_length));
/* ArrayBuffer argument is handled specially above; the rest of the
* argument variants are handled by shared code below.
*/
/* Push a new ArrayBuffer (becomes view .buffer) */
h_bufarr = duk__push_arraybuffer_with_length(ctx, byte_length);
DUK_ASSERT(h_bufarr != NULL);
h_val = h_bufarr->buf;
DUK_ASSERT(h_val != NULL);
/* Push the resulting view object and attach the ArrayBuffer. */
h_bufobj = duk_push_bufferobject_raw(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_BUFFEROBJECT |
DUK_HOBJECT_CLASS_AS_FLAGS(class_num),
proto_bidx);
h_bufobj->buf = h_val;
DUK_HBUFFER_INCREF(thr, h_val);
DUK_ASSERT(h_bufobj->offset == 0);
h_bufobj->length = byte_length;
h_bufobj->shift = (duk_uint8_t) shift;
h_bufobj->elem_type = (duk_uint8_t) elem_type;
h_bufobj->is_view = 1;
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
/* Set .buffer */
duk_dup(ctx, -2);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_LC_BUFFER, DUK_PROPDESC_FLAGS_NONE);
duk_compact(ctx, -1);
/* Copy values, the copy method depends on the arguments.
*
* Copy mode decision may depend on the validity of the underlying
* buffer of the source argument; there must be no harmful side effects
* from there to here for copy_mode to still be valid.
*/
DUK_DDD(DUK_DDDPRINT("copy mode: %d", (int) copy_mode));
switch (copy_mode) {
case 0: {
/* Use byte copy. */
duk_uint8_t *p_src;
duk_uint8_t *p_dst;
DUK_ASSERT(h_bufobj != NULL);
DUK_ASSERT(h_bufobj->buf != NULL);
DUK_ASSERT(DUK_HBUFFEROBJECT_VALID_SLICE(h_bufobj));
DUK_ASSERT(h_bufarg != NULL);
DUK_ASSERT(h_bufarg->buf != NULL);
DUK_ASSERT(DUK_HBUFFEROBJECT_VALID_SLICE(h_bufarg));
p_dst = DUK_HBUFFEROBJECT_GET_SLICE_BASE(thr->heap, h_bufobj);
p_src = DUK_HBUFFEROBJECT_GET_SLICE_BASE(thr->heap, h_bufarg);
DUK_DDD(DUK_DDDPRINT("using memcpy: p_src=%p, p_dst=%p, byte_length=%ld",
(void *) p_src, (void *) p_dst, (long) byte_length));
DUK_MEMCPY((void *) p_dst, (const void *) p_src, (size_t) byte_length);
break;
}
case 1: {
/* Copy values through direct validated reads and writes. */
duk_small_uint_t src_elem_size;
duk_small_uint_t dst_elem_size;
duk_uint8_t *p_src;
duk_uint8_t *p_src_end;
duk_uint8_t *p_dst;
DUK_ASSERT(h_bufobj != NULL);
DUK_ASSERT(h_bufobj->buf != NULL);
DUK_ASSERT(DUK_HBUFFEROBJECT_VALID_SLICE(h_bufobj));
DUK_ASSERT(h_bufarg != NULL);
DUK_ASSERT(h_bufarg->buf != NULL);
DUK_ASSERT(DUK_HBUFFEROBJECT_VALID_SLICE(h_bufarg));
src_elem_size = 1 << h_bufarg->shift;
dst_elem_size = elem_size;
p_src = DUK_HBUFFEROBJECT_GET_SLICE_BASE(thr->heap, h_bufarg);
p_dst = DUK_HBUFFEROBJECT_GET_SLICE_BASE(thr->heap, h_bufobj);
p_src_end = p_src + h_bufarg->length;
DUK_DDD(DUK_DDDPRINT("using fast copy: p_src=%p, p_src_end=%p, p_dst=%p, "
"src_elem_size=%d, dst_elem_size=%d",
(void *) p_src, (void *) p_src_end, (void *) p_dst,
(int) src_elem_size, (int) dst_elem_size));
while (p_src != p_src_end) {
DUK_DDD(DUK_DDDPRINT("fast path per element copy loop: "
"p_src=%p, p_src_end=%p, p_dst=%p",
(void *) p_src, (void *) p_src_end, (void *) p_dst));
/* A validated read() is always a number, so it's write coercion
* is always side effect free an won't invalidate pointers etc.
*/
duk_hbufferobject_push_validated_read(ctx, h_bufarg, p_src, src_elem_size);
duk_hbufferobject_validated_write(ctx, h_bufobj, p_dst, dst_elem_size);
duk_pop(ctx);
p_src += src_elem_size;
p_dst += dst_elem_size;
}
break;
}
case 2: {
/* Copy values by index reads and writes. Let virtual
* property handling take care of coercion.
*/
duk_uint_t i;
DUK_DDD(DUK_DDDPRINT("using slow copy"));
for (i = 0; i < elem_length; i++) {
duk_get_prop_index(ctx, 0, (duk_uarridx_t) i);
duk_put_prop_index(ctx, -2, (duk_uarridx_t) i);
}
break;
}
default:
case 3: {
/* No copy, leave zero bytes in the buffer. There's no
* ambiguity with Float32/Float64 because zero bytes also
* represent 0.0.
*/
#if !defined(DUK_USE_ZERO_BUFFER_DATA)
/* Khronos/ES6 requires zeroing even when DUK_USE_ZERO_BUFFER_DATA
* is not set.
*/
DUK_ASSERT(!DUK_HBUFFER_HAS_DYNAMIC((duk_hbuffer *) h_val));
DUK_MEMZERO((void *) DUK_HBUFFER_FIXED_GET_DATA_PTR(thr->heap, h_val), (duk_size_t) byte_length);
#endif
DUK_DDD(DUK_DDDPRINT("using no copy"));
break;
}
}
return 1;
fail_arguments:
return DUK_RET_RANGE_ERROR;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_typedarray_constructor(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_ret_t duk_bi_dataview_constructor(duk_context *ctx) {
duk_hbufferobject *h_bufarg;
duk_hbufferobject *h_bufobj;
duk_hbuffer *h_val;
duk_uint_t offset;
duk_uint_t length;
/* XXX: function flag to make this automatic? */
if (!duk_is_constructor_call(ctx)) {
return DUK_RET_TYPE_ERROR;
}
h_bufarg = duk__require_bufobj_value(ctx, 0);
DUK_ASSERT(h_bufarg != NULL);
duk__resolve_offset_opt_length(ctx, h_bufarg, 1, 2, &offset, &length, 1 /*throw_flag*/);
DUK_ASSERT(offset <= h_bufarg->length);
DUK_ASSERT(offset + length <= h_bufarg->length);
h_bufobj = duk_push_bufferobject_raw(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_BUFFEROBJECT |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_DATAVIEW),
DUK_BIDX_DATAVIEW_PROTOTYPE);
h_val = h_bufarg->buf;
if (h_val == NULL) {
return DUK_RET_TYPE_ERROR;
}
h_bufobj->buf = h_val;
DUK_HBUFFER_INCREF(thr, h_val);
h_bufobj->offset = h_bufarg->offset + offset;
h_bufobj->length = length;
DUK_ASSERT(h_bufobj->shift == 0);
DUK_ASSERT(h_bufobj->elem_type == DUK_HBUFFEROBJECT_ELEM_UINT8);
h_bufobj->is_view = 1;
/* The DataView .buffer property is ordinarily set to the argument
* which is an ArrayBuffer. We accept any duk_hbufferobject as
* an argument and .buffer will be set to the argument regardless
* of what it is. This may be a bit confusing if the argument
* is e.g. a DataView or another TypedArray view.
*
* XXX: Copy .buffer property from a DataView/TypedArray argument?
* Create a fresh ArrayBuffer for Duktape.Buffer and Node.js Buffer
* arguments? See: test-bug-dataview-buffer-prop.js.
*/
duk_dup(ctx, 0);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_LC_BUFFER, DUK_PROPDESC_FLAGS_NONE);
duk_compact(ctx, -1);
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
return 1;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_dataview_constructor(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
/*
* ArrayBuffer.isView()
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_ret_t duk_bi_arraybuffer_isview(duk_context *ctx) {
duk_hobject *h_obj;
duk_bool_t ret = 0;
h_obj = duk_get_hobject(ctx, 0);
if (h_obj != NULL && DUK_HOBJECT_IS_BUFFEROBJECT(h_obj)) {
ret = ((duk_hbufferobject *) h_obj)->is_view;
}
duk_push_boolean(ctx, ret);
return 1;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_arraybuffer_isview(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
/*
* Node.js Buffer: toString([encoding], [start], [end])
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_tostring(duk_context *ctx) {
duk_hthread *thr;
duk_hbufferobject *h_this;
duk_int_t start_offset, end_offset;
duk_uint8_t *buf_slice;
duk_size_t slice_length;
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
h_this = duk__get_bufobj_this(ctx);
if (h_this == NULL) {
/* XXX: happens e.g. when evaluating: String(Buffer.prototype). */
duk_push_string(ctx, "[object Object]");
return 1;
}
DUK_ASSERT_HBUFFEROBJECT_VALID(h_this);
/* ignore encoding for now */
duk__clamp_startend_nonegidx_noshift(ctx, h_this, 1 /*idx_start*/, 2 /*idx_end*/, &start_offset, &end_offset);
slice_length = (duk_size_t) (end_offset - start_offset);
buf_slice = (duk_uint8_t *) duk_push_fixed_buffer(ctx, slice_length);
DUK_ASSERT(buf_slice != NULL);
if (h_this->buf == NULL) {
goto type_error;
}
if (DUK_HBUFFEROBJECT_VALID_BYTEOFFSET_EXCL(h_this, start_offset + slice_length)) {
DUK_MEMCPY((void *) buf_slice,
(const void *) (DUK_HBUFFEROBJECT_GET_SLICE_BASE(thr->heap, h_this) + start_offset),
(size_t) slice_length);
} else {
/* not covered, return all zeroes */
;
}
duk_to_string(ctx, -1);
return 1;
type_error:
return DUK_RET_TYPE_ERROR;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_tostring(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
/*
* Duktape.Buffer: toString(), valueOf()
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_ret_t duk_bi_buffer_prototype_tostring_shared(duk_context *ctx) {
duk_hthread *thr;
duk_tval *tv;
duk_small_int_t to_string = duk_get_current_magic(ctx);
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
tv = duk_get_borrowed_this_tval(ctx);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_BUFFER(tv)) {
duk_hbuffer *h_buf;
h_buf = DUK_TVAL_GET_BUFFER(tv);
DUK_ASSERT(h_buf != NULL);
duk_push_hbuffer(ctx, h_buf);
} else if (DUK_TVAL_IS_OBJECT(tv)) {
duk_hobject *h;
duk_hbufferobject *h_bufobj;
/* Accept any duk_hbufferobject, though we're only normally
* called for Duktape.Buffer values.
*/
h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
if (!DUK_HOBJECT_IS_BUFFEROBJECT(h)) {
DUK_DD(DUK_DDPRINT("toString/valueOf() called for a non-bufferobject object"));
goto type_error;
}
h_bufobj = (duk_hbufferobject *) h;
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
if (h_bufobj->buf == NULL) {
DUK_DD(DUK_DDPRINT("toString/valueOf() called for a bufferobject with NULL buf"));
goto type_error;
}
duk_push_hbuffer(ctx, h_bufobj->buf);
} else {
goto type_error;
}
if (to_string) {
duk_to_string(ctx, -1);
}
return 1;
type_error:
return DUK_RET_TYPE_ERROR;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_buffer_prototype_tostring_shared(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
/*
* Node.js Buffer.prototype: toJSON()
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_tojson(duk_context *ctx) {
duk_hthread *thr;
duk_hbufferobject *h_this;
duk_uint8_t *buf;
duk_uint_t i;
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
h_this = duk__require_bufobj_this(ctx);
DUK_ASSERT(h_this != NULL);
if (h_this->buf == NULL || !DUK_HBUFFEROBJECT_VALID_SLICE(h_this)) {
/* Serialize uncovered backing buffer as a null; doesn't
* really matter as long we're memory safe.
*/
duk_push_null(ctx);
return 1;
}
duk_push_object(ctx);
duk_push_hstring_stridx(ctx, DUK_STRIDX_UC_BUFFER);
duk_put_prop_stridx(ctx, -2, DUK_STRIDX_TYPE);
duk_push_array(ctx);
for (i = 0; i < h_this->length; i++) {
/* XXX: regetting the pointer may be overkill - we're writing
* to a side-effect free array here.
*/
DUK_ASSERT(h_this->buf != NULL);
buf = DUK_HBUFFEROBJECT_GET_SLICE_BASE(thr->heap, h_this);
duk_push_uint(ctx, (duk_uint_t) buf[i]);
duk_put_prop_index(ctx, -2, (duk_idx_t) i);
}
duk_put_prop_stridx(ctx, -2, DUK_STRIDX_DATA);
return 1;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_tojson(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
/*
* Node.js Buffer.prototype.equals()
* Node.js Buffer.prototype.compare()
* Node.js Buffer.compare()
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_ret_t duk_bi_buffer_compare_shared(duk_context *ctx) {
duk_hthread *thr;
duk_small_uint_t magic;
duk_hbufferobject *h_bufarg1;
duk_hbufferobject *h_bufarg2;
duk_small_int_t comp_res;
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
magic = duk_get_current_magic(ctx);
if (magic & 0x02) {
/* Static call style. */
h_bufarg1 = duk__require_bufobj_value(ctx, 0);
h_bufarg2 = duk__require_bufobj_value(ctx, 1);
} else {
h_bufarg1 = duk__require_bufobj_this(ctx);
h_bufarg2 = duk__require_bufobj_value(ctx, 0);
}
DUK_ASSERT(h_bufarg1 != NULL);
DUK_ASSERT(h_bufarg2 != NULL);
/* We want to compare the slice/view areas of the arguments.
* If either slice/view is invalid (underlying buffer is shorter)
* ensure equals() is false, but otherwise the only thing that
* matters is to be memory safe.
*/
if (DUK_HBUFFEROBJECT_VALID_SLICE(h_bufarg1) &&
DUK_HBUFFEROBJECT_VALID_SLICE(h_bufarg2)) {
comp_res = duk_js_data_compare((const duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_bufarg1->buf) + h_bufarg1->offset,
(const duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_bufarg2->buf) + h_bufarg2->offset,
(duk_size_t) h_bufarg1->length,
(duk_size_t) h_bufarg2->length);
} else {
comp_res = -1; /* either nonzero value is ok */
}
if (magic & 0x01) {
/* compare: similar to string comparison but for buffer data. */
duk_push_int(ctx, comp_res);
} else {
/* equals */
duk_push_boolean(ctx, (comp_res == 0));
}
return 1;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_buffer_compare_shared(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
/*
* Node.js Buffer.prototype.fill()
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_fill(duk_context *ctx) {
duk_hthread *thr;
duk_hbufferobject *h_this;
const duk_uint8_t *fill_str_ptr;
duk_size_t fill_str_len;
duk_uint8_t fill_value;
duk_int_t fill_offset;
duk_int_t fill_end;
duk_size_t fill_length;
duk_uint8_t *p;
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
h_this = duk__require_bufobj_this(ctx);
DUK_ASSERT(h_this != NULL);
if (h_this->buf == NULL) {
return DUK_RET_TYPE_ERROR;
}
/* [ value offset end ] */
if (duk_is_string(ctx, 0)) {
fill_str_ptr = (const duk_uint8_t *) duk_get_lstring(ctx, 0, &fill_str_len);
DUK_ASSERT(fill_str_ptr != NULL);
} else {
fill_value = (duk_uint8_t) duk_to_uint32(ctx, 0);
fill_str_ptr = (const duk_uint8_t *) &fill_value;
fill_str_len = 1;
}
/* Fill offset handling is more lenient than in Node.js. */
duk__clamp_startend_nonegidx_noshift(ctx, h_this, 1 /*idx_start*/, 2 /*idx_end*/, &fill_offset, &fill_end);
DUK_DDD(DUK_DDDPRINT("fill: fill_value=%02x, fill_offset=%ld, fill_end=%ld, view length=%ld",
(unsigned int) fill_value, (long) fill_offset, (long) fill_end, (long) h_this->length));
DUK_ASSERT(fill_end - fill_offset >= 0);
DUK_ASSERT(h_this->buf != NULL);
p = (DUK_HBUFFEROBJECT_GET_SLICE_BASE(thr->heap, h_this) + fill_offset);
fill_length = (duk_size_t) (fill_end - fill_offset);
if (fill_str_len == 1) {
/* Handle single character fills as memset() even when
* the fill data comes from a one-char argument.
*/
DUK_MEMSET((void *) p, (int) fill_str_ptr[0], (size_t) fill_length);
} else if (fill_str_len > 1) {
duk_size_t i, n, t;
for (i = 0, n = (fill_end - fill_offset), t = 0; i < n; i++) {
p[i] = fill_str_ptr[t++];
if (t >= fill_str_len) {
t = 0;
}
}
} else {
DUK_DDD(DUK_DDDPRINT("zero size fill pattern, ignore silently"));
}
/* Return the Buffer to allow chaining: b.fill(0x11).fill(0x22, 3, 5).toString() */
duk_push_this(ctx);
return 1;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_fill(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
/*
* Node.js Buffer.prototype.write(string, [offset], [length], [encoding])
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_write(duk_context *ctx) {
duk_hthread *thr;
duk_hbufferobject *h_this;
duk_uint_t offset;
duk_uint_t length;
const duk_uint8_t *str_data;
duk_size_t str_len;
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
h_this = duk__require_bufobj_this(ctx);
DUK_ASSERT(h_this != NULL);
/* Argument must be a string, e.g. a buffer is not allowed. */
str_data = (const duk_uint8_t *) duk_require_lstring(ctx, 0, &str_len);
duk__resolve_offset_opt_length(ctx, h_this, 1, 2, &offset, &length, 0 /*throw_flag*/);
DUK_ASSERT(offset <= h_this->length);
DUK_ASSERT(offset + length <= h_this->length);
/* XXX: encoding is ignored now. */
if (length > str_len) {
length = (duk_uint_t) str_len;
}
if (DUK_HBUFFEROBJECT_VALID_SLICE(h_this)) {
/* Cannot overlap. */
DUK_MEMCPY((void *) (DUK_HBUFFEROBJECT_GET_SLICE_BASE(thr->heap, h_this) + offset),
(const void *) str_data,
(size_t) length);
} else {
DUK_DDD(DUK_DDDPRINT("write() target buffer is not covered, silent ignore"));
}
duk_push_uint(ctx, length);
return 1;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_write(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
/*
* Node.js Buffer.prototype.copy()
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_copy(duk_context *ctx) {
duk_hthread *thr;
duk_hbufferobject *h_this;
duk_hbufferobject *h_bufarg;
duk_int_t source_length;
duk_int_t target_length;
duk_int_t target_start, source_start, source_end;
duk_uint_t target_ustart, source_ustart, source_uend;
duk_uint_t copy_size = 0;
/* [ targetBuffer targetStart sourceStart sourceEnd ] */
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
h_this = duk__require_bufobj_this(ctx);
h_bufarg = duk__require_bufobj_value(ctx, 0);
DUK_ASSERT(h_this != NULL);
DUK_ASSERT(h_bufarg != NULL);
source_length = (duk_int_t) h_this->length;
target_length = (duk_int_t) h_bufarg->length;
target_start = duk_to_int(ctx, 1);
source_start = duk_to_int(ctx, 2);
if (duk_is_undefined(ctx, 3)) {
source_end = source_length;
} else {
source_end = duk_to_int(ctx, 3);
}
DUK_DDD(DUK_DDDPRINT("checking copy args: target_start=%ld, target_length=%ld, "
"source_start=%ld, source_end=%ld, source_length=%ld",
(long) target_start, (long) h_bufarg->length,
(long) source_start, (long) source_end, (long) source_length));
/* This behavior mostly mimics Node.js now. */
if (source_start < 0 || source_end < 0 || target_start < 0) {
/* Negative offsets cause a RangeError. */
goto fail_bounds;
}
source_ustart = (duk_uint_t) source_start;
source_uend = (duk_uint_t) source_end;
target_ustart = (duk_uint_t) target_start;
if (source_ustart >= source_uend || /* crossed offsets or zero size */
source_ustart >= (duk_uint_t) source_length || /* source out-of-bounds (but positive) */
target_ustart >= (duk_uint_t) target_length) { /* target out-of-bounds (but positive) */
goto silent_ignore;
}
if (source_uend >= (duk_uint_t) source_length) {
/* Source end clamped silently to available length. */
source_uend = source_length;
}
copy_size = source_uend - source_ustart;
if (target_ustart + copy_size > (duk_uint_t) target_length) {
/* Clamp to target's end if too long.
*
* NOTE: there's no overflow possibility in the comparison;
* both target_ustart and copy_size are >= 0 and based on
* values in duk_int_t range. Adding them as duk_uint_t
* values is then guaranteed not to overflow.
*/
DUK_ASSERT(target_ustart + copy_size >= target_ustart); /* no overflow */
DUK_ASSERT(target_ustart + copy_size >= copy_size); /* no overflow */
copy_size = (duk_uint_t) target_length - target_ustart;
}
DUK_DDD(DUK_DDDPRINT("making copy: target_ustart=%lu source_ustart=%lu copy_size=%lu",
(unsigned long) target_ustart, (unsigned long) source_ustart,
(unsigned long) copy_size));
DUK_ASSERT(copy_size >= 1);
DUK_ASSERT(source_ustart <= (duk_uint_t) source_length);
DUK_ASSERT(source_ustart + copy_size <= (duk_uint_t) source_length);
DUK_ASSERT(target_ustart <= (duk_uint_t) target_length);
DUK_ASSERT(target_ustart + copy_size <= (duk_uint_t) target_length);
/* Ensure copy is covered by underlying buffers. */
DUK_ASSERT(h_bufarg->buf != NULL); /* length check */
DUK_ASSERT(h_this->buf != NULL); /* length check */
if (DUK_HBUFFEROBJECT_VALID_BYTEOFFSET_EXCL(h_bufarg, target_ustart + copy_size) &&
DUK_HBUFFEROBJECT_VALID_BYTEOFFSET_EXCL(h_this, source_ustart + copy_size)) {
/* Must use memmove() because copy area may overlap (source and target
* buffer may be the same, or from different slices.
*/
DUK_MEMMOVE((void *) (DUK_HBUFFEROBJECT_GET_SLICE_BASE(thr->heap, h_bufarg) + target_ustart),
(const void *) (DUK_HBUFFEROBJECT_GET_SLICE_BASE(thr->heap, h_this) + source_ustart),
(size_t) copy_size);
} else {
DUK_DDD(DUK_DDDPRINT("buffer copy not covered by underlying buffer(s), ignoring"));
}
silent_ignore:
/* Return value is like write(), number of bytes written.
* The return value matters because of code like:
* "off += buf.copy(...)".
*/
duk_push_uint(ctx, copy_size);
return 1;
fail_bounds:
return DUK_RET_RANGE_ERROR;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_copy(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
/*
* TypedArray.prototype.set()
*
* TypedArray set() is pretty interesting to implement because:
*
* - The source argument may be a plain array or a typedarray. If the
* source is a TypedArray, values are decoded and re-encoded into the
* target (not as a plain byte copy). This may happen even when the
* element byte size is the same, e.g. integer values may be re-encoded
* into floats.
*
* - Source and target may refer to the same underlying buffer, so that
* the set() operation may overlap. The specification requires that this
* must work as if a copy was made before the operation. Note that this
* is NOT a simple memmove() situation because the source and target
* byte sizes may be different -- e.g. a 4-byte source (Int8Array) may
* expand to a 16-byte target (Uint32Array) so that the target overlaps
* the source both from beginning and the end (unlike in typical memmove).
*
* - Even if 'buf' pointers of the source and target differ, there's no
* guarantee that their memory areas don't overlap. This may be the
* case with external buffers.
*
* Even so, it is nice to optimize for the common case:
*
* - Source and target separate buffers or non-overlapping.
*
* - Source and target have a compatible type so that a plain byte copy
* is possible. Note that while e.g. uint8 and int8 are compatible
* (coercion one way or another doesn't change the byte representation),
* e.g. int8 and uint8clamped are NOT compatible when writing int8
* values into uint8clamped typedarray (-1 would clamp to 0 for instance).
*
* See test-bi-typedarray-proto-set.js.
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_ret_t duk_bi_typedarray_set(duk_context *ctx) {
duk_hthread *thr;
duk_hbufferobject *h_this;
duk_hobject *h_obj;
duk_uarridx_t i, n;
duk_int_t offset_signed;
duk_uint_t offset_elems;
duk_uint_t offset_bytes;
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
h_this = duk__require_bufobj_this(ctx);
DUK_ASSERT(h_this != NULL);
DUK_ASSERT_HBUFFEROBJECT_VALID(h_this);
if (h_this->buf == NULL) {
DUK_DDD(DUK_DDDPRINT("source neutered, skip copy"));
return 0;
}
h_obj = duk_require_hobject(ctx, 0);
DUK_ASSERT(h_obj != NULL);
/* XXX: V8 throws a TypeError for negative values. Would it
* be more useful to interpret negative offsets here from the
* end of the buffer too?
*/
offset_signed = duk_to_int(ctx, 1);
if (offset_signed < 0) {
return DUK_RET_TYPE_ERROR;
}
offset_elems = (duk_uint_t) offset_signed;
offset_bytes = offset_elems << h_this->shift;
if ((offset_bytes >> h_this->shift) != offset_elems) {
/* Byte length would overflow. */
/* XXX: easier check with less code? */
return DUK_RET_RANGE_ERROR;
}
if (offset_bytes > h_this->length) {
/* Equality may be OK but >length not. Checking
* this explicitly avoids some overflow cases
* below.
*/
return DUK_RET_RANGE_ERROR;
}
DUK_ASSERT(offset_bytes <= h_this->length);
/* Fast path: source is a TypedArray (or any bufferobject). */
if (DUK_HOBJECT_IS_BUFFEROBJECT(h_obj)) {
duk_hbufferobject *h_bufarg;
duk_uint16_t comp_mask;
duk_small_int_t no_overlap = 0;
duk_uint_t src_length;
duk_uint_t dst_length;
duk_uint_t dst_length_elems;
duk_uint8_t *p_src_base;
duk_uint8_t *p_src_end;
duk_uint8_t *p_src;
duk_uint8_t *p_dst_base;
duk_uint8_t *p_dst;
duk_small_uint_t src_elem_size;
duk_small_uint_t dst_elem_size;
h_bufarg = (duk_hbufferobject *) h_obj;
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufarg);
if (h_bufarg->buf == NULL) {
DUK_DDD(DUK_DDDPRINT("target neutered, skip copy"));
return 0;
}
/* Nominal size check. */
src_length = h_bufarg->length; /* bytes in source */
dst_length_elems = (src_length >> h_bufarg->shift); /* elems in source and dest */
dst_length = dst_length_elems << h_this->shift; /* bytes in dest */
if ((dst_length >> h_this->shift) != dst_length_elems) {
/* Byte length would overflow. */
/* XXX: easier check with less code? */
return DUK_RET_RANGE_ERROR;
}
DUK_DDD(DUK_DDDPRINT("nominal size check: src_length=%ld, dst_length=%ld",
(long) src_length, (long) dst_length));
DUK_ASSERT(offset_bytes <= h_this->length);
if (dst_length > h_this->length - offset_bytes) {
/* Overflow not an issue because subtraction is used on the right
* side and guaranteed to be >= 0.
*/
DUK_DDD(DUK_DDDPRINT("copy exceeds target buffer nominal length"));
return DUK_RET_RANGE_ERROR;
}
if (!DUK_HBUFFEROBJECT_VALID_BYTEOFFSET_EXCL(h_this, offset_bytes + dst_length)) {
DUK_DDD(DUK_DDDPRINT("copy not covered by underlying target buffer, ignore"));
return 0;
}
p_src_base = DUK_HBUFFEROBJECT_GET_SLICE_BASE(thr->heap, h_bufarg);
p_dst_base = DUK_HBUFFEROBJECT_GET_SLICE_BASE(thr->heap, h_this) + offset_bytes;
/* Check actual underlying buffers for validity and that they
* cover the copy. No side effects are allowed after the check
* so that the validity status doesn't change.
*/
if (!DUK_HBUFFEROBJECT_VALID_SLICE(h_this) ||
!DUK_HBUFFEROBJECT_VALID_SLICE(h_bufarg)) {
/* The condition could be more narrow and check for the
* copy area only, but there's no need for fine grained
* behavior when the underlying buffer is misconfigured.
*/
DUK_DDD(DUK_DDDPRINT("source and/or target not covered by underlying buffer, skip copy"));
return 0;
}
/* We want to do a straight memory copy if possible: this is
* an important operation because .set() is the TypedArray
* way to copy chunks of memory. However, because set()
* conceptually works in terms of elements, not all views are
* compatible with direct byte copying.
*
* If we do manage a direct copy, the "overlap issue" handled
* below can just be solved using memmove() because the source
* and destination element sizes are necessarily equal.
*/
DUK_ASSERT(h_this->elem_type < sizeof(duk__buffer_elemtype_copy_compatible) / sizeof(duk_uint16_t));
comp_mask = duk__buffer_elemtype_copy_compatible[h_this->elem_type];
if (comp_mask & (1 << h_bufarg->elem_type)) {
DUK_ASSERT(src_length == dst_length);
DUK_DDD(DUK_DDDPRINT("fast path: able to use memmove() because views are compatible"));
DUK_MEMMOVE((void *) p_dst_base, (const void *) p_src_base, (size_t) dst_length);
return 0;
}
DUK_DDD(DUK_DDDPRINT("fast path: views are not compatible with a byte copy, copy by item"));
/* We want to avoid making a copy to process set() but that's
* not always possible: the source and the target may overlap
* and because element sizes are different, the overlap cannot
* always be handled with a memmove() or choosing the copy
* direction in a certain way. For example, if source type is
* uint8 and target type is uint32, the target area may exceed
* the source area from both ends!
*
* Note that because external buffers may point to the same
* memory areas, we must ultimately make this check using
* pointers.
*
* NOTE: careful with side effects: any side effect may cause
* a buffer resize (or external buffer pointer/length update)!
*/
DUK_DDD(DUK_DDDPRINT("overlap check: p_src_base=%p, src_length=%ld, "
"p_dst_base=%p, dst_length=%ld",
(void *) p_src_base, (long) src_length,
(void *) p_dst_base, (long) dst_length));
if (p_src_base >= p_dst_base + dst_length || /* source starts after dest ends */
p_src_base + src_length <= p_dst_base) { /* source ends before dest starts */
no_overlap = 1;
}
if (!no_overlap) {
/* There's overlap: the desired end result is that
* conceptually a copy is made to avoid "trampling"
* of source data by destination writes. We make
* an actual temporary copy to handle this case.
*/
duk_uint8_t *p_src_copy;
DUK_DDD(DUK_DDDPRINT("there is overlap, make a copy of the source"));
p_src_copy = (duk_uint8_t *) duk_push_fixed_buffer(ctx, src_length);
DUK_ASSERT(p_src_copy != NULL);
DUK_MEMCPY((void *) p_src_copy, (const void *) p_src_base, (size_t) src_length);
p_src_base = p_src_copy; /* use p_src_base from now on */
}
/* Value stack intentionally mixed size here. */
DUK_DDD(DUK_DDDPRINT("after overlap check: p_src_base=%p, src_length=%ld, "
"p_dst_base=%p, dst_length=%ld, valstack top=%ld",
(void *) p_src_base, (long) src_length,
(void *) p_dst_base, (long) dst_length,
(long) duk_get_top(ctx)));
/* Ready to make the copy. We must proceed element by element
* and must avoid any side effects that might cause the buffer
* validity check above to become invalid.
*
* Although we work through the value stack here, only plain
* numbers are handled which should be side effect safe.
*/
src_elem_size = 1 << h_bufarg->shift;
dst_elem_size = 1 << h_this->shift;
p_src = p_src_base;
p_dst = p_dst_base;
p_src_end = p_src_base + src_length;
while (p_src != p_src_end) {
DUK_DDD(DUK_DDDPRINT("fast path per element copy loop: "
"p_src=%p, p_src_end=%p, p_dst=%p",
(void *) p_src, (void *) p_src_end, (void *) p_dst));
/* A validated read() is always a number, so it's write coercion
* is always side effect free an won't invalidate pointers etc.
*/
duk_hbufferobject_push_validated_read(ctx, h_bufarg, p_src, src_elem_size);
duk_hbufferobject_validated_write(ctx, h_this, p_dst, dst_elem_size);
duk_pop(ctx);
p_src += src_elem_size;
p_dst += dst_elem_size;
}
return 0;
} else {
/* Slow path: quite slow, but we save space by using the property code
* to write coerce target values. We don't need to worry about overlap
* here because the source is not a TypedArray.
*
* We could use the bufferobject write coercion helper but since the
* property read may have arbitrary side effects, full validity checks
* would be needed for every element anyway.
*/
n = (duk_uarridx_t) duk_get_length(ctx, 0);
DUK_ASSERT(offset_bytes <= h_this->length);
if ((n << h_this->shift) > h_this->length - offset_bytes) {
/* Overflow not an issue because subtraction is used on the right
* side and guaranteed to be >= 0.
*/
DUK_DDD(DUK_DDDPRINT("copy exceeds target buffer nominal length"));
return DUK_RET_RANGE_ERROR;
}
/* There's no need to check for buffer validity status for the
* target here: the property access code will do that for each
* element. Moreover, if we did check the validity here, side
* effects from reading the source argument might invalidate
* the results anyway.
*/
DUK_ASSERT_TOP(ctx, 2);
duk_push_this(ctx);
for (i = 0; i < n; i++) {
duk_get_prop_index(ctx, 0, i);
duk_put_prop_index(ctx, 2, offset_elems + i);
}
}
return 0;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_typedarray_set(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
/*
* Node.js Buffer.prototype.slice([start], [end])
* ArrayBuffer.prototype.slice(begin, [end])
* TypedArray.prototype.slice(begin, [end])
*
* The API calls are almost identical; negative indices are counted from end
* of buffer, and final indices are clamped (allowing crossed indices). Main
* differences:
*
* - Copy/view behavior; Node.js .slice() and TypedArray .subarray() create
* views, ArrayBuffer .slice() creates a copy
*
* - Resulting object has a different class and prototype depending on the
* call (or 'this' argument)
*
* - TypedArray .subarray() arguments are element indices, not byte offsets
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_ret_t duk_bi_buffer_slice_shared(duk_context *ctx) {
duk_hthread *thr;
duk_small_int_t magic;
duk_small_uint_t res_class_num;
duk_hobject *res_proto;
duk_hbufferobject *h_this;
duk_hbufferobject *h_bufobj;
duk_hbuffer *h_val;
duk_int_t start_offset, end_offset;
duk_uint_t slice_length;
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
/* [ start end ] */
magic = duk_get_current_magic(ctx);
h_this = duk__require_bufobj_this(ctx);
/* Slice offsets are element (not byte) offsets, which only matters
* for TypedArray views, Node.js Buffer and ArrayBuffer have shift
* zero so byte and element offsets are the same. Negative indices
* are counted from end of slice, crossed indices are allowed (and
* result in zero length result), and final values are clamped
* against the current slice. There's intentionally no check
* against the underlying buffer here.
*/
duk__clamp_startend_negidx_shifted(ctx, h_this, 0 /*idx_start*/, 1 /*idx_end*/, &start_offset, &end_offset);
DUK_ASSERT(end_offset >= start_offset);
slice_length = (duk_uint_t) (end_offset - start_offset);
/* The resulting buffer object gets the same class and prototype as
* the buffer in 'this', e.g. if the input is a Node.js Buffer the
* result is a Node.js Buffer; if the input is a Float32Array, the
* result is a Float32Array.
*
* For the class number this seems correct. The internal prototype
* is not so clear: if 'this' is a bufferobject with a non-standard
* prototype object, that value gets copied over into the result
* (instead of using the standard prototype for that object type).
*/
res_class_num = DUK_HOBJECT_GET_CLASS_NUMBER((duk_hobject *) h_this);
h_bufobj = duk_push_bufferobject_raw(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_BUFFEROBJECT |
DUK_HOBJECT_CLASS_AS_FLAGS(res_class_num),
DUK_BIDX_OBJECT_PROTOTYPE); /* replaced */
DUK_ASSERT(h_bufobj != NULL);
res_proto = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, (duk_hobject *) h_this); /* may be NULL */
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, (duk_hobject *) h_bufobj, res_proto);
h_bufobj->length = slice_length;
h_bufobj->shift = h_this->shift; /* inherit */
h_bufobj->elem_type = h_this->elem_type; /* inherit */
h_bufobj->is_view = magic & 0x01;
DUK_ASSERT(h_bufobj->is_view == 0 || h_bufobj->is_view == 1);
h_val = h_this->buf;
if (h_val == NULL) {
return DUK_RET_TYPE_ERROR;
}
if (magic & 0x02) {
/* non-zero: make copy */
duk_uint8_t *p_copy;
duk_size_t copy_length;
p_copy = (duk_uint8_t *) duk_push_fixed_buffer(ctx, (duk_size_t) slice_length);
DUK_ASSERT(p_copy != NULL);
/* Copy slice, respecting underlying buffer limits; remainder
* is left as zero.
*/
copy_length = DUK_HBUFFEROBJECT_CLAMP_BYTELENGTH(h_this, slice_length);
DUK_MEMCPY((void *) p_copy,
(const void *) (DUK_HBUFFEROBJECT_GET_SLICE_BASE(thr->heap, h_this) + start_offset),
copy_length);
h_val = duk_get_hbuffer(ctx, -1);
DUK_ASSERT(h_val != NULL);
h_bufobj->buf = h_val;
DUK_HBUFFER_INCREF(thr, h_val);
DUK_ASSERT(h_bufobj->offset == 0);
duk_pop(ctx); /* reachable so pop OK */
} else {
h_bufobj->buf = h_val;
DUK_HBUFFER_INCREF(thr, h_val);
h_bufobj->offset = (duk_uint_t) (h_this->offset + start_offset);
/* Copy the .buffer property, needed for TypedArray.prototype.subarray().
*
* XXX: limit copy only for TypedArray classes specifically?
*/
duk_push_this(ctx);
if (duk_get_prop_stridx(ctx, -1, DUK_STRIDX_LC_BUFFER)) {
duk_xdef_prop_stridx(ctx, -3, DUK_STRIDX_LC_BUFFER, DUK_PROPDESC_FLAGS_NONE);
duk_pop(ctx);
} else {
duk_pop_2(ctx);
}
}
/* unbalanced stack on purpose */
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
return 1;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_buffer_slice_shared(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
/*
* Node.js Buffer.isEncoding()
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_is_encoding(duk_context *ctx) {
const char *encoding;
/* only accept lowercase 'utf8' now. */
encoding = duk_to_string(ctx, 0);
DUK_ASSERT(duk_is_string(ctx, 0)); /* guaranteed by duk_to_string() */
duk_push_boolean(ctx, DUK_STRCMP(encoding, "utf8") == 0);
return 1;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_is_encoding(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
/*
* Node.js Buffer.isBuffer()
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_is_buffer(duk_context *ctx) {
duk_hthread *thr;
duk_tval *tv;
duk_hobject *h;
duk_hobject *h_proto;
duk_bool_t ret = 0;
thr = (duk_hthread *) ctx;
DUK_ASSERT(duk_get_top(ctx) >= 1); /* nargs */
tv = duk_get_tval(ctx, 0);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_OBJECT(tv)) {
h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
h_proto = thr->builtins[DUK_BIDX_NODEJS_BUFFER_PROTOTYPE];
DUK_ASSERT(h_proto != NULL);
h = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h);
if (h) {
ret = duk_hobject_prototype_chain_contains(thr, h, h_proto, 0 /*ignore_loop*/);
}
}
duk_push_boolean(ctx, ret);
return 1;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_is_buffer(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
/*
* Node.js Buffer.byteLength()
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_byte_length(duk_context *ctx) {
const char *str;
duk_size_t len;
/* At the moment Buffer(<str>) will just use the string bytes as
* is (ignoring encoding), so we return the string length here
* unconditionally.
*/
str = duk_to_lstring(ctx, 0, &len);
DUK_UNREF(str);
duk_push_size_t(ctx, len);
return 1;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_byte_length(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
/*
* Node.js Buffer.concat()
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_concat(duk_context *ctx) {
duk_hthread *thr;
duk_hobject *h_arg;
duk_int_t total_length = 0;
duk_hbufferobject *h_bufobj;
duk_hbufferobject *h_bufres;
duk_hbuffer *h_val;
duk_uint_t i, n;
duk_uint8_t *p;
duk_size_t space_left;
duk_size_t copy_size;
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
/* Node.js accepts only actual Arrays. */
h_arg = duk_require_hobject(ctx, 0);
if (DUK_HOBJECT_GET_CLASS_NUMBER(h_arg) != DUK_HOBJECT_CLASS_ARRAY) {
return DUK_RET_TYPE_ERROR;
}
/* Compute result length and validate argument buffers. */
n = (duk_uint_t) duk_get_length(ctx, 0);
for (i = 0; i < n; i++) {
/* Neutered checks not necessary here: neutered buffers have
* zero 'length' so we'll effectively skip them.
*/
DUK_ASSERT_TOP(ctx, 2); /* [ array totalLength ] */
duk_get_prop_index(ctx, 0, (duk_uarridx_t) i); /* -> [ array totalLength buf ] */
h_bufobj = duk__require_bufobj_value(ctx, 2);
DUK_ASSERT(h_bufobj != NULL);
total_length += h_bufobj->length;
duk_pop(ctx);
}
if (n == 1) {
/* For the case n==1 Node.js doesn't seem to type check
* the sole member but we do it before returning it.
* For this case only the original buffer object is
* returned (not a copy).
*/
duk_get_prop_index(ctx, 0, 0);
return 1;
}
/* User totalLength overrides a computed length, but we'll check
* every copy in the copy loop. Note that duk_to_uint() can
* technically have arbitrary side effects so we need to recheck
* the buffers in the copy loop.
*/
if (!duk_is_undefined(ctx, 1) && n > 0) {
/* For n == 0, Node.js ignores totalLength argument and
* returns a zero length buffer.
*/
total_length = duk_to_int(ctx, 1);
}
if (total_length < 0) {
return DUK_RET_RANGE_ERROR;
}
h_bufres = duk_push_bufferobject_raw(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_BUFFEROBJECT |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_BUFFER),
DUK_BIDX_NODEJS_BUFFER_PROTOTYPE);
DUK_ASSERT(h_bufres != NULL);
p = (duk_uint8_t *) duk_push_fixed_buffer(ctx, total_length);
DUK_ASSERT(p != NULL);
space_left = total_length;
for (i = 0; i < n; i++) {
DUK_ASSERT_TOP(ctx, 4); /* [ array totalLength bufres buf ] */
duk_get_prop_index(ctx, 0, (duk_uarridx_t) i);
h_bufobj = duk__require_bufobj_value(ctx, 4);
DUK_ASSERT(h_bufobj != NULL);
copy_size = h_bufobj->length;
if (copy_size > space_left) {
copy_size = space_left;
}
if (h_bufobj->buf != NULL &&
DUK_HBUFFEROBJECT_VALID_SLICE(h_bufobj)) {
DUK_MEMCPY((void *) p,
(const void *) DUK_HBUFFEROBJECT_GET_SLICE_BASE(thr->heap, h_bufobj),
copy_size);
} else {
/* Just skip, leaving zeroes in the result. */
;
}
p += copy_size;
space_left -= copy_size;
duk_pop(ctx);
}
h_val = duk_get_hbuffer(ctx, -1);
DUK_ASSERT(h_val != NULL);
duk__set_bufobj_buffer(ctx, h_bufres, h_val);
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufres);
duk_pop(ctx); /* pop plain buffer, now reachable through h_bufres */
return 1; /* return h_bufres */
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_nodejs_buffer_concat(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
/*
* Shared readfield and writefield methods
*
* The readfield/writefield methods need support for endianness and field
* types. All offsets are byte based so no offset shifting is needed.
*/
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
/* Format of magic, bits:
* 0...1: field type; 0=uint8, 1=uint16, 2=uint32, 3=float, 4=double, 5=unused, 6=unused, 7=unused
* 3: endianness: 0=little, 1=big
* 4: signed: 1=yes, 0=no
* 5: typedarray: 1=yes, 0=no
*/
#define DUK__FLD_8BIT 0
#define DUK__FLD_16BIT 1
#define DUK__FLD_32BIT 2
#define DUK__FLD_FLOAT 3
#define DUK__FLD_DOUBLE 4
#define DUK__FLD_VARINT 5
#define DUK__FLD_BIGENDIAN (1 << 3)
#define DUK__FLD_SIGNED (1 << 4)
#define DUK__FLD_TYPEDARRAY (1 << 5)
/* XXX: split into separate functions for each field type? */
DUK_INTERNAL duk_ret_t duk_bi_buffer_readfield(duk_context *ctx) {
duk_hthread *thr;
duk_small_int_t magic = (duk_small_int_t) duk_get_current_magic(ctx);
duk_small_int_t magic_ftype;
duk_small_int_t magic_bigendian;
duk_small_int_t magic_signed;
duk_small_int_t magic_typedarray;
duk_small_int_t endswap;
duk_hbufferobject *h_this;
duk_bool_t no_assert;
duk_int_t offset_signed;
duk_uint_t offset;
duk_uint_t buffer_length;
duk_uint_t check_length;
duk_uint8_t *buf;
duk_double_union du;
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
magic_ftype = magic & 0x0007;
magic_bigendian = magic & 0x0008;
magic_signed = magic & 0x0010;
magic_typedarray = magic & 0x0020;
h_this = duk__require_bufobj_this(ctx);
DUK_ASSERT(h_this != NULL);
buffer_length = h_this->length;
/* [ offset noAssert ], when ftype != DUK__FLD_VARINT */
/* [ offset fieldByteLength noAssert ], when ftype == DUK__FLD_VARINT */
/* [ offset littleEndian ], when DUK__FLD_TYPEDARRAY (regardless of ftype) */
/* Handle TypedArray vs. Node.js Buffer arg differences */
if (magic_typedarray) {
no_assert = 0;
#if defined(DUK_USE_INTEGER_LE)
endswap = !duk_to_boolean(ctx, 1); /* 1=little endian */
#else
endswap = duk_to_boolean(ctx, 1); /* 1=little endian */
#endif
} else {
no_assert = duk_to_boolean(ctx, (magic_ftype == DUK__FLD_VARINT) ? 2 : 1);
#if defined(DUK_USE_INTEGER_LE)
endswap = magic_bigendian;
#else
endswap = !magic_bigendian;
#endif
}
/* Offset is coerced first to signed integer range and then to unsigned.
* This ensures we can add a small byte length (1-8) to the offset in
* bound checks and not wrap.
*/
offset_signed = duk_to_int(ctx, 0);
offset = (duk_uint_t) offset_signed;
if (offset_signed < 0) {
goto fail_bounds;
}
DUK_DDD(DUK_DDDPRINT("readfield, buffer_length=%ld, offset=%ld, no_assert=%d, "
"magic=%04x, magic_fieldtype=%d, magic_bigendian=%d, magic_signed=%d, "
"endswap=%d",
(long) buffer_length, (long) offset, (int) no_assert,
(unsigned int) magic, (int) magic_ftype, (int) (magic_bigendian >> 3),
(int) (magic_signed >> 4), (int) endswap));
/* Update 'buffer_length' to be the effective, safe limit which
* takes into account the underlying buffer. This value will be
* potentially invalidated by any side effect.
*/
check_length = DUK_HBUFFEROBJECT_CLAMP_BYTELENGTH(h_this, buffer_length);
DUK_DDD(DUK_DDDPRINT("buffer_length=%ld, check_length=%ld",
(long) buffer_length, (long) check_length));
if (h_this->buf) {
buf = DUK_HBUFFEROBJECT_GET_SLICE_BASE(thr->heap, h_this);
} else {
/* Neutered. We could go into the switch-case safely with
* buf == NULL because check_length == 0. To avoid scanbuild
* warnings, fail directly instead.
*/
DUK_ASSERT(check_length == 0);
goto fail_neutered;
}
DUK_ASSERT(buf != NULL);
switch (magic_ftype) {
case DUK__FLD_8BIT: {
duk_uint8_t tmp;
if (offset + 1U > check_length) {
goto fail_bounds;
}
tmp = buf[offset];
if (magic_signed) {
duk_push_int(ctx, (duk_int_t) ((duk_int8_t) tmp));
} else {
duk_push_uint(ctx, (duk_uint_t) tmp);
}
break;
}
case DUK__FLD_16BIT: {
duk_uint16_t tmp;
if (offset + 2U > check_length) {
goto fail_bounds;
}
DUK_MEMCPY((void *) du.uc, (const void *) (buf + offset), 2);
tmp = du.us[0];
if (endswap) {
tmp = DUK_BSWAP16(tmp);
}
if (magic_signed) {
duk_push_int(ctx, (duk_int_t) ((duk_int16_t) tmp));
} else {
duk_push_uint(ctx, (duk_uint_t) tmp);
}
break;
}
case DUK__FLD_32BIT: {
duk_uint32_t tmp;
if (offset + 4U > check_length) {
goto fail_bounds;
}
DUK_MEMCPY((void *) du.uc, (const void *) (buf + offset), 4);
tmp = du.ui[0];
if (endswap) {
tmp = DUK_BSWAP32(tmp);
}
if (magic_signed) {
duk_push_int(ctx, (duk_int_t) ((duk_int32_t) tmp));
} else {
duk_push_uint(ctx, (duk_uint_t) tmp);
}
break;
}
case DUK__FLD_FLOAT: {
duk_uint32_t tmp;
if (offset + 4U > check_length) {
goto fail_bounds;
}
DUK_MEMCPY((void *) du.uc, (const void *) (buf + offset), 4);
if (endswap) {
tmp = du.ui[0];
tmp = DUK_BSWAP32(tmp);
du.ui[0] = tmp;
}
duk_push_number(ctx, (duk_double_t) du.f[0]);
break;
}
case DUK__FLD_DOUBLE: {
if (offset + 8U > check_length) {
goto fail_bounds;
}
DUK_MEMCPY((void *) du.uc, (const void *) (buf + offset), 8);
if (endswap) {
DUK_DBLUNION_BSWAP64(&du);
}
duk_push_number(ctx, (duk_double_t) du.d);
break;
}
case DUK__FLD_VARINT: {
/* Node.js Buffer variable width integer field. We don't really
* care about speed here, so aim for shortest algorithm.
*/
duk_int_t field_bytelen;
duk_int_t i, i_step, i_end;
#if defined(DUK_USE_64BIT_OPS)
duk_int64_t tmp;
duk_small_uint_t shift_tmp;
#else
duk_double_t tmp;
duk_small_int_t highbyte;
#endif
const duk_uint8_t *p;
field_bytelen = duk_get_int(ctx, 1); /* avoid side effects! */
if (field_bytelen < 1 || field_bytelen > 6) {
goto fail_field_length;
}
if (offset + (duk_uint_t) field_bytelen > check_length) {
goto fail_bounds;
}
p = (const duk_uint8_t *) (buf + offset);
/* Slow gathering of value using either 64-bit arithmetic
* or IEEE doubles if 64-bit types not available. Handling
* of negative numbers is a bit non-obvious in both cases.
*/
if (magic_bigendian) {
/* Gather in big endian */
i = 0;
i_step = 1;
i_end = field_bytelen; /* one i_step over */
} else {
/* Gather in little endian */
i = field_bytelen - 1;
i_step = -1;
i_end = -1; /* one i_step over */
}
#if defined(DUK_USE_64BIT_OPS)
tmp = 0;
do {
DUK_ASSERT(i >= 0 && i < field_bytelen);
tmp = (tmp << 8) + (duk_int64_t) p[i];
i += i_step;
} while (i != i_end);
if (magic_signed) {
/* Shift to sign extend. */
shift_tmp = 64 - (field_bytelen * 8);
tmp = (tmp << shift_tmp) >> shift_tmp;
}
duk_push_i64(ctx, tmp);
#else
highbyte = p[i];
if (magic_signed && (highbyte & 0x80) != 0) {
/* 0xff => 255 - 256 = -1; 0x80 => 128 - 256 = -128 */
tmp = (duk_double_t) (highbyte - 256);
} else {
tmp = (duk_double_t) highbyte;
}
for (;;) {
i += i_step;
if (i == i_end) {
break;
}
DUK_ASSERT(i >= 0 && i < field_bytelen);
tmp = (tmp * 256.0) + (duk_double_t) p[i];
}
duk_push_number(ctx, tmp);
#endif
break;
}
default: { /* should never happen but default here */
goto fail_bounds;
}
}
return 1;
fail_neutered:
fail_field_length:
fail_bounds:
if (no_assert) {
/* Node.js return value for noAssert out-of-bounds reads is
* usually (but not always) NaN. Return NaN consistently.
*/
duk_push_nan(ctx);
return 1;
}
return DUK_RET_RANGE_ERROR;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_buffer_readfield(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
/* XXX: split into separate functions for each field type? */
DUK_INTERNAL duk_ret_t duk_bi_buffer_writefield(duk_context *ctx) {
duk_hthread *thr;
duk_small_int_t magic = (duk_small_int_t) duk_get_current_magic(ctx);
duk_small_int_t magic_ftype;
duk_small_int_t magic_bigendian;
duk_small_int_t magic_signed;
duk_small_int_t magic_typedarray;
duk_small_int_t endswap;
duk_hbufferobject *h_this;
duk_bool_t no_assert;
duk_int_t offset_signed;
duk_uint_t offset;
duk_uint_t buffer_length;
duk_uint_t check_length;
duk_uint8_t *buf;
duk_double_union du;
duk_int_t nbytes = 0;
thr = (duk_hthread *) ctx;
DUK_UNREF(thr);
magic_ftype = magic & 0x0007;
magic_bigendian = magic & 0x0008;
magic_signed = magic & 0x0010;
magic_typedarray = magic & 0x0020;
DUK_UNREF(magic_signed);
h_this = duk__require_bufobj_this(ctx);
DUK_ASSERT(h_this != NULL);
buffer_length = h_this->length;
/* [ value offset noAssert ], when ftype != DUK__FLD_VARINT */
/* [ value offset fieldByteLength noAssert ], when ftype == DUK__FLD_VARINT */
/* [ offset value littleEndian ], when DUK__FLD_TYPEDARRAY (regardless of ftype) */
/* Handle TypedArray vs. Node.js Buffer arg differences */
if (magic_typedarray) {
no_assert = 0;
#if defined(DUK_USE_INTEGER_LE)
endswap = !duk_to_boolean(ctx, 2); /* 1=little endian */
#else
endswap = duk_to_boolean(ctx, 2); /* 1=little endian */
#endif
duk_swap(ctx, 0, 1); /* offset/value order different from Node.js */
} else {
no_assert = duk_to_boolean(ctx, (magic_ftype == DUK__FLD_VARINT) ? 3 : 2);
#if defined(DUK_USE_INTEGER_LE)
endswap = magic_bigendian;
#else
endswap = !magic_bigendian;
#endif
}
/* Offset is coerced first to signed integer range and then to unsigned.
* This ensures we can add a small byte length (1-8) to the offset in
* bound checks and not wrap.
*/
offset_signed = duk_to_int(ctx, 1);
offset = (duk_uint_t) offset_signed;
/* We need 'nbytes' even for a failed offset; return value must be
* (offset + nbytes) even when write fails due to invalid offset.
*/
if (magic_ftype != DUK__FLD_VARINT) {
DUK_ASSERT(magic_ftype >= 0 && magic_ftype < (duk_small_int_t) (sizeof(duk__buffer_nbytes_from_fldtype) / sizeof(duk_uint8_t)));
nbytes = duk__buffer_nbytes_from_fldtype[magic_ftype];
} else {
nbytes = duk_get_int(ctx, 2);
if (nbytes < 1 || nbytes > 6) {
goto fail_field_length;
}
}
DUK_ASSERT(nbytes >= 1 && nbytes <= 8);
/* Now we can check offset validity. */
if (offset_signed < 0) {
goto fail_bounds;
}
DUK_DDD(DUK_DDDPRINT("writefield, value=%!T, buffer_length=%ld, offset=%ld, no_assert=%d, "
"magic=%04x, magic_fieldtype=%d, magic_bigendian=%d, magic_signed=%d, "
"endswap=%d",
duk_get_tval(ctx, 0), (long) buffer_length, (long) offset, (int) no_assert,
(unsigned int) magic, (int) magic_ftype, (int) (magic_bigendian >> 3),
(int) (magic_signed >> 4), (int) endswap));
/* Coerce value to a number before computing check_length, so that
* the field type specific coercion below can't have side effects
* that would invalidate check_length.
*/
duk_to_number(ctx, 0);
/* Update 'buffer_length' to be the effective, safe limit which
* takes into account the underlying buffer. This value will be
* potentially invalidated by any side effect.
*/
check_length = DUK_HBUFFEROBJECT_CLAMP_BYTELENGTH(h_this, buffer_length);
DUK_DDD(DUK_DDDPRINT("buffer_length=%ld, check_length=%ld",
(long) buffer_length, (long) check_length));
if (h_this->buf) {
buf = DUK_HBUFFEROBJECT_GET_SLICE_BASE(thr->heap, h_this);
} else {
/* Neutered. We could go into the switch-case safely with
* buf == NULL because check_length == 0. To avoid scanbuild
* warnings, fail directly instead.
*/
DUK_ASSERT(check_length == 0);
goto fail_neutered;
}
DUK_ASSERT(buf != NULL);
switch (magic_ftype) {
case DUK__FLD_8BIT: {
if (offset + 1U > check_length) {
goto fail_bounds;
}
/* sign doesn't matter when writing */
buf[offset] = (duk_uint8_t) duk_to_uint32(ctx, 0);
break;
}
case DUK__FLD_16BIT: {
duk_uint16_t tmp;
if (offset + 2U > check_length) {
goto fail_bounds;
}
tmp = (duk_uint16_t) duk_to_uint32(ctx, 0);
if (endswap) {
tmp = DUK_BSWAP16(tmp);
}
du.us[0] = tmp;
/* sign doesn't matter when writing */
DUK_MEMCPY((void *) (buf + offset), (const void *) du.uc, 2);
break;
}
case DUK__FLD_32BIT: {
duk_uint32_t tmp;
if (offset + 4U > check_length) {
goto fail_bounds;
}
tmp = (duk_uint32_t) duk_to_uint32(ctx, 0);
if (endswap) {
tmp = DUK_BSWAP32(tmp);
}
du.ui[0] = tmp;
/* sign doesn't matter when writing */
DUK_MEMCPY((void *) (buf + offset), (const void *) du.uc, 4);
break;
}
case DUK__FLD_FLOAT: {
duk_uint32_t tmp;
if (offset + 4U > check_length) {
goto fail_bounds;
}
du.f[0] = (duk_float_t) duk_to_number(ctx, 0);
if (endswap) {
tmp = du.ui[0];
tmp = DUK_BSWAP32(tmp);
du.ui[0] = tmp;
}
/* sign doesn't matter when writing */
DUK_MEMCPY((void *) (buf + offset), (const void *) du.uc, 4);
break;
}
case DUK__FLD_DOUBLE: {
if (offset + 8U > check_length) {
goto fail_bounds;
}
du.d = (duk_double_t) duk_to_number(ctx, 0);
if (endswap) {
DUK_DBLUNION_BSWAP64(&du);
}
/* sign doesn't matter when writing */
DUK_MEMCPY((void *) (buf + offset), (const void *) du.uc, 8);
break;
}
case DUK__FLD_VARINT: {
/* Node.js Buffer variable width integer field. We don't really
* care about speed here, so aim for shortest algorithm.
*/
duk_int_t field_bytelen;
duk_int_t i, i_step, i_end;
#if defined(DUK_USE_64BIT_OPS)
duk_int64_t tmp;
#else
duk_double_t tmp;
#endif
duk_uint8_t *p;
field_bytelen = (duk_int_t) nbytes;
if (offset + (duk_uint_t) field_bytelen > check_length) {
goto fail_bounds;
}
/* Slow writing of value using either 64-bit arithmetic
* or IEEE doubles if 64-bit types not available. There's
* no special sign handling when writing varints.
*/
if (magic_bigendian) {
/* Write in big endian */
i = field_bytelen; /* one i_step added at top of loop */
i_step = -1;
i_end = 0;
} else {
/* Write in little endian */
i = -1; /* one i_step added at top of loop */
i_step = 1;
i_end = field_bytelen - 1;
}
/* XXX: The duk_to_number() cast followed by integer coercion
* is platform specific so NaN, +/- Infinity, and out-of-bounds
* values result in platform specific output now.
* See: test-bi-nodejs-buffer-proto-varint-special.js
*/
#if defined(DUK_USE_64BIT_OPS)
tmp = (duk_int64_t) duk_to_number(ctx, 0);
p = (duk_uint8_t *) (buf + offset);
do {
i += i_step;
DUK_ASSERT(i >= 0 && i < field_bytelen);
p[i] = (duk_uint8_t) (tmp & 0xff);
tmp = tmp >> 8; /* unnecessary shift for last byte */
} while (i != i_end);
#else
tmp = duk_to_number(ctx, 0);
p = (duk_uint8_t *) (buf + offset);
do {
i += i_step;
tmp = DUK_FLOOR(tmp);
DUK_ASSERT(i >= 0 && i < field_bytelen);
p[i] = (duk_uint8_t) (DUK_FMOD(tmp, 256.0));
tmp = tmp / 256.0; /* unnecessary div for last byte */
} while (i != i_end);
#endif
break;
}
default: { /* should never happen but default here */
goto fail_bounds;
}
}
/* Node.js Buffer: return offset + #bytes written (i.e. next
* write offset).
*/
if (magic_typedarray) {
/* For TypedArrays 'undefined' return value is specified
* by ES6 (matches V8).
*/
return 0;
}
duk_push_uint(ctx, offset + nbytes);
return 1;
fail_neutered:
fail_field_length:
fail_bounds:
if (no_assert) {
/* Node.js return value for failed writes is offset + #bytes
* that would have been written.
*/
/* XXX: for negative input offsets, 'offset' will be a large
* positive value so the result here is confusing.
*/
if (magic_typedarray) {
return 0;
}
duk_push_uint(ctx, offset + nbytes);
return 1;
}
return DUK_RET_RANGE_ERROR;
}
#else /* DUK_USE_BUFFEROBJECT_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_buffer_writefield(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
#undef DUK__FLD_8BIT
#undef DUK__FLD_16BIT
#undef DUK__FLD_32BIT
#undef DUK__FLD_FLOAT
#undef DUK__FLD_DOUBLE
#undef DUK__FLD_VARINT
#undef DUK__FLD_BIGENDIAN
#undef DUK__FLD_SIGNED
#undef DUK__FLD_TYPEDARRAY
#line 1 "duk_bi_date.c"
/*
* Date built-ins
*
* Unlike most built-ins, Date has some platform dependencies for getting
* UTC time, converting between UTC and local time, and parsing and
* formatting time values. These are all abstracted behind DUK_USE_xxx
* config options. There are built-in platform specific providers for
* POSIX and Windows, but external providers can also be used.
*
* See doc/datetime.rst.
*
*/
/* include removed: duk_internal.h */
/*
* Forward declarations
*/
DUK_LOCAL_DECL duk_double_t duk__push_this_get_timeval_tzoffset(duk_context *ctx, duk_small_uint_t flags, duk_int_t *out_tzoffset);
DUK_LOCAL_DECL duk_double_t duk__push_this_get_timeval(duk_context *ctx, duk_small_uint_t flags);
DUK_LOCAL_DECL void duk__twodigit_year_fixup(duk_context *ctx, duk_idx_t idx_val);
DUK_LOCAL_DECL duk_ret_t duk__set_this_timeval_from_dparts(duk_context *ctx, duk_double_t *dparts, duk_small_uint_t flags);
/*
* Other file level defines
*/
/* Debug macro to print all parts and dparts (used manually because of debug level). */
#define DUK__DPRINT_PARTS_AND_DPARTS(parts,dparts) do { \
DUK_D(DUK_DPRINT("parts: %ld %ld %ld %ld %ld %ld %ld %ld, dparts: %lf %lf %lf %lf %lf %lf %lf %lf", \
(long) (parts)[0], (long) (parts)[1], \
(long) (parts)[2], (long) (parts)[3], \
(long) (parts)[4], (long) (parts)[5], \
(long) (parts)[6], (long) (parts)[7], \
(double) (dparts)[0], (double) (dparts)[1], \
(double) (dparts)[2], (double) (dparts)[3], \
(double) (dparts)[4], (double) (dparts)[5], \
(double) (dparts)[6], (double) (dparts)[7])); \
} while (0)
#define DUK__DPRINT_PARTS(parts) do { \
DUK_D(DUK_DPRINT("parts: %ld %ld %ld %ld %ld %ld %ld %ld", \
(long) (parts)[0], (long) (parts)[1], \
(long) (parts)[2], (long) (parts)[3], \
(long) (parts)[4], (long) (parts)[5], \
(long) (parts)[6], (long) (parts)[7])); \
} while (0)
#define DUK__DPRINT_DPARTS(dparts) do { \
DUK_D(DUK_DPRINT("dparts: %lf %lf %lf %lf %lf %lf %lf %lf", \
(double) (dparts)[0], (double) (dparts)[1], \
(double) (dparts)[2], (double) (dparts)[3], \
(double) (dparts)[4], (double) (dparts)[5], \
(double) (dparts)[6], (double) (dparts)[7])); \
} while (0)
/* Equivalent year for DST calculations outside [1970,2038[ range, see
* E5 Section 15.9.1.8. Equivalent year has the same leap-year-ness and
* starts with the same weekday on Jan 1.
* https://bugzilla.mozilla.org/show_bug.cgi?id=351066
*/
#define DUK__YEAR(x) ((duk_uint8_t) ((x) - 1970))
DUK_LOCAL duk_uint8_t duk__date_equivyear[14] = {
#if 1
/* This is based on V8 EquivalentYear() algorithm (see src/genequivyear.py):
* http://code.google.com/p/v8/source/browse/trunk/src/date.h#146
*/
/* non-leap year: sunday, monday, ... */
DUK__YEAR(2023), DUK__YEAR(2035), DUK__YEAR(2019), DUK__YEAR(2031),
DUK__YEAR(2015), DUK__YEAR(2027), DUK__YEAR(2011),
/* leap year: sunday, monday, ... */
DUK__YEAR(2012), DUK__YEAR(2024), DUK__YEAR(2008), DUK__YEAR(2020),
DUK__YEAR(2032), DUK__YEAR(2016), DUK__YEAR(2028)
#endif
#if 0
/* This is based on Rhino EquivalentYear() algorithm:
* https://github.com/mozilla/rhino/blob/f99cc11d616f0cdda2c42bde72b3484df6182947/src/org/mozilla/javascript/NativeDate.java
*/
/* non-leap year: sunday, monday, ... */
DUK__YEAR(1978), DUK__YEAR(1973), DUK__YEAR(1985), DUK__YEAR(1986),
DUK__YEAR(1981), DUK__YEAR(1971), DUK__YEAR(1977),
/* leap year: sunday, monday, ... */
DUK__YEAR(1984), DUK__YEAR(1996), DUK__YEAR(1980), DUK__YEAR(1992),
DUK__YEAR(1976), DUK__YEAR(1988), DUK__YEAR(1972)
#endif
};
#undef DUK__YEAR
/*
* ISO 8601 subset parser.
*/
/* Parser part count. */
#define DUK__NUM_ISO8601_PARSER_PARTS 9
/* Parser part indices. */
#define DUK__PI_YEAR 0
#define DUK__PI_MONTH 1
#define DUK__PI_DAY 2
#define DUK__PI_HOUR 3
#define DUK__PI_MINUTE 4
#define DUK__PI_SECOND 5
#define DUK__PI_MILLISECOND 6
#define DUK__PI_TZHOUR 7
#define DUK__PI_TZMINUTE 8
/* Parser part masks. */
#define DUK__PM_YEAR (1 << DUK__PI_YEAR)
#define DUK__PM_MONTH (1 << DUK__PI_MONTH)
#define DUK__PM_DAY (1 << DUK__PI_DAY)
#define DUK__PM_HOUR (1 << DUK__PI_HOUR)
#define DUK__PM_MINUTE (1 << DUK__PI_MINUTE)
#define DUK__PM_SECOND (1 << DUK__PI_SECOND)
#define DUK__PM_MILLISECOND (1 << DUK__PI_MILLISECOND)
#define DUK__PM_TZHOUR (1 << DUK__PI_TZHOUR)
#define DUK__PM_TZMINUTE (1 << DUK__PI_TZMINUTE)
/* Parser separator indices. */
#define DUK__SI_PLUS 0
#define DUK__SI_MINUS 1
#define DUK__SI_T 2
#define DUK__SI_SPACE 3
#define DUK__SI_COLON 4
#define DUK__SI_PERIOD 5
#define DUK__SI_Z 6
#define DUK__SI_NUL 7
/* Parser separator masks. */
#define DUK__SM_PLUS (1 << DUK__SI_PLUS)
#define DUK__SM_MINUS (1 << DUK__SI_MINUS)
#define DUK__SM_T (1 << DUK__SI_T)
#define DUK__SM_SPACE (1 << DUK__SI_SPACE)
#define DUK__SM_COLON (1 << DUK__SI_COLON)
#define DUK__SM_PERIOD (1 << DUK__SI_PERIOD)
#define DUK__SM_Z (1 << DUK__SI_Z)
#define DUK__SM_NUL (1 << DUK__SI_NUL)
/* Rule control flags. */
#define DUK__CF_NEG (1 << 0) /* continue matching, set neg_tzoffset flag */
#define DUK__CF_ACCEPT (1 << 1) /* accept string */
#define DUK__CF_ACCEPT_NUL (1 << 2) /* accept string if next char is NUL (otherwise reject) */
#define DUK__PACK_RULE(partmask,sepmask,nextpart,flags) \
((duk_uint32_t) (partmask) + \
(((duk_uint32_t) (sepmask)) << 9) + \
(((duk_uint32_t) (nextpart)) << 17) + \
(((duk_uint32_t) (flags)) << 21))
#define DUK__UNPACK_RULE(rule,var_nextidx,var_flags) do { \
(var_nextidx) = (duk_small_uint_t) (((rule) >> 17) & 0x0f); \
(var_flags) = (duk_small_uint_t) ((rule) >> 21); \
} while (0)
#define DUK__RULE_MASK_PART_SEP 0x1ffffUL
/* Matching separator index is used in the control table */
DUK_LOCAL const duk_uint8_t duk__parse_iso8601_seps[] = {
DUK_ASC_PLUS /*0*/, DUK_ASC_MINUS /*1*/, DUK_ASC_UC_T /*2*/, DUK_ASC_SPACE /*3*/,
DUK_ASC_COLON /*4*/, DUK_ASC_PERIOD /*5*/, DUK_ASC_UC_Z /*6*/, DUK_ASC_NUL /*7*/
};
/* Rule table: first matching rule is used to determine what to do next. */
DUK_LOCAL const duk_uint32_t duk__parse_iso8601_control[] = {
DUK__PACK_RULE(DUK__PM_YEAR, DUK__SM_MINUS, DUK__PI_MONTH, 0),
DUK__PACK_RULE(DUK__PM_MONTH, DUK__SM_MINUS, DUK__PI_DAY, 0),
DUK__PACK_RULE(DUK__PM_YEAR | DUK__PM_MONTH | DUK__PM_DAY, DUK__SM_T | DUK__SM_SPACE, DUK__PI_HOUR, 0),
DUK__PACK_RULE(DUK__PM_HOUR, DUK__SM_COLON, DUK__PI_MINUTE, 0),
DUK__PACK_RULE(DUK__PM_MINUTE, DUK__SM_COLON, DUK__PI_SECOND, 0),
DUK__PACK_RULE(DUK__PM_SECOND, DUK__SM_PERIOD, DUK__PI_MILLISECOND, 0),
DUK__PACK_RULE(DUK__PM_TZHOUR, DUK__SM_COLON, DUK__PI_TZMINUTE, 0),
DUK__PACK_RULE(DUK__PM_YEAR | DUK__PM_MONTH | DUK__PM_DAY | DUK__PM_HOUR /*Note1*/ | DUK__PM_MINUTE | DUK__PM_SECOND | DUK__PM_MILLISECOND, DUK__SM_PLUS, DUK__PI_TZHOUR, 0),
DUK__PACK_RULE(DUK__PM_YEAR | DUK__PM_MONTH | DUK__PM_DAY | DUK__PM_HOUR /*Note1*/ | DUK__PM_MINUTE | DUK__PM_SECOND | DUK__PM_MILLISECOND, DUK__SM_MINUS, DUK__PI_TZHOUR, DUK__CF_NEG),
DUK__PACK_RULE(DUK__PM_YEAR | DUK__PM_MONTH | DUK__PM_DAY | DUK__PM_HOUR /*Note1*/ | DUK__PM_MINUTE | DUK__PM_SECOND | DUK__PM_MILLISECOND, DUK__SM_Z, 0, DUK__CF_ACCEPT_NUL),
DUK__PACK_RULE(DUK__PM_YEAR | DUK__PM_MONTH | DUK__PM_DAY | DUK__PM_HOUR /*Note1*/ | DUK__PM_MINUTE | DUK__PM_SECOND | DUK__PM_MILLISECOND | DUK__PM_TZHOUR /*Note2*/ | DUK__PM_TZMINUTE, DUK__SM_NUL, 0, DUK__CF_ACCEPT)
/* Note1: the specification doesn't require matching a time form with
* just hours ("HH"), but we accept it here, e.g. "2012-01-02T12Z".
*
* Note2: the specification doesn't require matching a timezone offset
* with just hours ("HH"), but accept it here, e.g. "2012-01-02T03:04:05+02"
*/
};
DUK_LOCAL duk_bool_t duk__parse_string_iso8601_subset(duk_context *ctx, const char *str) {
duk_int_t parts[DUK__NUM_ISO8601_PARSER_PARTS];
duk_double_t dparts[DUK_DATE_IDX_NUM_PARTS];
duk_double_t d;
const duk_uint8_t *p;
duk_small_uint_t part_idx = 0;
duk_int_t accum = 0;
duk_small_uint_t ndigits = 0;
duk_bool_t neg_year = 0;
duk_bool_t neg_tzoffset = 0;
duk_uint_fast8_t ch;
duk_small_uint_t i;
/* During parsing, month and day are one-based; set defaults here. */
DUK_MEMZERO(parts, sizeof(parts));
DUK_ASSERT(parts[DUK_DATE_IDX_YEAR] == 0); /* don't care value, year is mandatory */
parts[DUK_DATE_IDX_MONTH] = 1;
parts[DUK_DATE_IDX_DAY] = 1;
/* Special handling for year sign. */
p = (const duk_uint8_t *) str;
ch = p[0];
if (ch == DUK_ASC_PLUS) {
p++;
} else if (ch == DUK_ASC_MINUS) {
neg_year = 1;
p++;
}
for (;;) {
ch = *p++;
DUK_DDD(DUK_DDDPRINT("parsing, part_idx=%ld, char=%ld ('%c')",
(long) part_idx, (long) ch,
(int) ((ch >= 0x20 && ch <= 0x7e) ? ch : DUK_ASC_QUESTION)));
if (ch >= DUK_ASC_0 && ch <= DUK_ASC_9) {
if (ndigits >= 9) {
DUK_DDD(DUK_DDDPRINT("too many digits -> reject"));
goto reject;
}
if (part_idx == DUK__PI_MILLISECOND /*msec*/ && ndigits >= 3) {
/* ignore millisecond fractions after 3 */
} else {
accum = accum * 10 + ((duk_int_t) ch) - ((duk_int_t) DUK_ASC_0) + 0x00;
ndigits++;
}
} else {
duk_uint_fast32_t match_val;
duk_small_int_t sep_idx;
if (ndigits <= 0) {
goto reject;
}
if (part_idx == DUK__PI_MILLISECOND) {
/* complete the millisecond field */
while (ndigits < 3) {
accum *= 10;
ndigits++;
}
}
parts[part_idx] = accum;
DUK_DDD(DUK_DDDPRINT("wrote part %ld -> value %ld", (long) part_idx, (long) accum));
accum = 0;
ndigits = 0;
for (i = 0; i < (duk_small_uint_t) (sizeof(duk__parse_iso8601_seps) / sizeof(duk_uint8_t)); i++) {
if (duk__parse_iso8601_seps[i] == ch) {
break;
}
}
if (i == (duk_small_uint_t) (sizeof(duk__parse_iso8601_seps) / sizeof(duk_uint8_t))) {
DUK_DDD(DUK_DDDPRINT("separator character doesn't match -> reject"));
goto reject;
}
sep_idx = i;
match_val = (1UL << part_idx) + (1UL << (sep_idx + 9)); /* match against rule part/sep bits */
for (i = 0; i < (duk_small_uint_t) (sizeof(duk__parse_iso8601_control) / sizeof(duk_uint32_t)); i++) {
duk_uint_fast32_t rule = duk__parse_iso8601_control[i];
duk_small_uint_t nextpart;
duk_small_uint_t cflags;
DUK_DDD(DUK_DDDPRINT("part_idx=%ld, sep_idx=%ld, match_val=0x%08lx, considering rule=0x%08lx",
(long) part_idx, (long) sep_idx,
(unsigned long) match_val, (unsigned long) rule));
if ((rule & match_val) != match_val) {
continue;
}
DUK__UNPACK_RULE(rule, nextpart, cflags);
DUK_DDD(DUK_DDDPRINT("rule match -> part_idx=%ld, sep_idx=%ld, match_val=0x%08lx, "
"rule=0x%08lx -> nextpart=%ld, cflags=0x%02lx",
(long) part_idx, (long) sep_idx,
(unsigned long) match_val, (unsigned long) rule,
(long) nextpart, (unsigned long) cflags));
if (cflags & DUK__CF_NEG) {
neg_tzoffset = 1;
}
if (cflags & DUK__CF_ACCEPT) {
goto accept;
}
if (cflags & DUK__CF_ACCEPT_NUL) {
DUK_ASSERT(*(p - 1) != (char) 0);
if (*p == DUK_ASC_NUL) {
goto accept;
}
goto reject;
}
part_idx = nextpart;
break;
} /* rule match */
if (i == (duk_small_uint_t) (sizeof(duk__parse_iso8601_control) / sizeof(duk_uint32_t))) {
DUK_DDD(DUK_DDDPRINT("no rule matches -> reject"));
goto reject;
}
if (ch == 0) {
/* This shouldn't be necessary, but check just in case
* to avoid any chance of overruns.
*/
DUK_DDD(DUK_DDDPRINT("NUL after rule matching (should not happen) -> reject"));
goto reject;
}
} /* if-digit-else-ctrl */
} /* char loop */
/* We should never exit the loop above. */
DUK_UNREACHABLE();
reject:
DUK_DDD(DUK_DDDPRINT("reject"));
return 0;
accept:
DUK_DDD(DUK_DDDPRINT("accept"));
/* Apply timezone offset to get the main parts in UTC */
if (neg_year) {
parts[DUK__PI_YEAR] = -parts[DUK__PI_YEAR];
}
if (neg_tzoffset) {
parts[DUK__PI_HOUR] += parts[DUK__PI_TZHOUR];
parts[DUK__PI_MINUTE] += parts[DUK__PI_TZMINUTE];
} else {
parts[DUK__PI_HOUR] -= parts[DUK__PI_TZHOUR];
parts[DUK__PI_MINUTE] -= parts[DUK__PI_TZMINUTE];
}
parts[DUK__PI_MONTH] -= 1; /* zero-based month */
parts[DUK__PI_DAY] -= 1; /* zero-based day */
/* Use double parts, they tolerate unnormalized time.
*
* Note: DUK_DATE_IDX_WEEKDAY is initialized with a bogus value (DUK__PI_TZHOUR)
* on purpose. It won't be actually used by duk_bi_date_get_timeval_from_dparts(),
* but will make the value initialized just in case, and avoid any
* potential for Valgrind issues.
*/
for (i = 0; i < DUK_DATE_IDX_NUM_PARTS; i++) {
DUK_DDD(DUK_DDDPRINT("part[%ld] = %ld", (long) i, (long) parts[i]));
dparts[i] = parts[i];
}
d = duk_bi_date_get_timeval_from_dparts(dparts, 0 /*flags*/);
duk_push_number(ctx, d);
return 1;
}
/*
* Date/time parsing helper.
*
* Parse a datetime string into a time value. We must first try to parse
* the input according to the standard format in E5.1 Section 15.9.1.15.
* If that fails, we can try to parse using custom parsing, which can
* either be platform neutral (custom code) or platform specific (using
* existing platform API calls).
*
* Note in particular that we must parse whatever toString(), toUTCString(),
* and toISOString() can produce; see E5.1 Section 15.9.4.2.
*
* Returns 1 to allow tail calling.
*
* There is much room for improvement here with respect to supporting
* alternative datetime formats. For instance, V8 parses '2012-01-01' as
* UTC and '2012/01/01' as local time.
*/
DUK_LOCAL duk_ret_t duk__parse_string(duk_context *ctx, const char *str) {
/* XXX: there is a small risk here: because the ISO 8601 parser is
* very loose, it may end up parsing some datetime values which
* would be better parsed with a platform specific parser.
*/
DUK_ASSERT(str != NULL);
DUK_DDD(DUK_DDDPRINT("parse datetime from string '%s'", (const char *) str));
if (duk__parse_string_iso8601_subset(ctx, str) != 0) {
return 1;
}
#if defined(DUK_USE_DATE_PARSE_STRING)
/* Contract, either:
* - Push value on stack and return 1
* - Don't push anything on stack and return 0
*/
if (DUK_USE_DATE_PARSE_STRING(ctx, str) != 0) {
return 1;
}
#else
/* No platform-specific parsing, this is not an error. */
#endif
duk_push_nan(ctx);
return 1;
}
/*
* Calendar helpers
*
* Some helpers are used for getters and can operate on normalized values
* which can be represented with 32-bit signed integers. Other helpers are
* needed by setters and operate on un-normalized double values, must watch
* out for non-finite numbers etc.
*/
DUK_LOCAL duk_uint8_t duk__days_in_month[12] = {
(duk_uint8_t) 31, (duk_uint8_t) 28, (duk_uint8_t) 31, (duk_uint8_t) 30,
(duk_uint8_t) 31, (duk_uint8_t) 30, (duk_uint8_t) 31, (duk_uint8_t) 31,
(duk_uint8_t) 30, (duk_uint8_t) 31, (duk_uint8_t) 30, (duk_uint8_t) 31
};
/* Maximum iteration count for computing UTC-to-local time offset when
* creating an Ecmascript time value from local parts.
*/
#define DUK__LOCAL_TZOFFSET_MAXITER 4
/* Because 'day since epoch' can be negative and is used to compute weekday
* using a modulo operation, add this multiple of 7 to avoid negative values
* when year is below 1970 epoch. Ecmascript time values are restricted to
* +/- 100 million days from epoch, so this adder fits nicely into 32 bits.
* Round to a multiple of 7 (= floor(100000000 / 7) * 7) and add margin.
*/
#define DUK__WEEKDAY_MOD_ADDER (20000000 * 7) /* 0x08583b00 */
DUK_INTERNAL duk_bool_t duk_bi_date_is_leap_year(duk_int_t year) {
if ((year % 4) != 0) {
return 0;
}
if ((year % 100) != 0) {
return 1;
}
if ((year % 400) != 0) {
return 0;
}
return 1;
}
DUK_INTERNAL duk_bool_t duk_bi_date_timeval_in_valid_range(duk_double_t x) {
return (x >= -DUK_DATE_MSEC_100M_DAYS && x <= DUK_DATE_MSEC_100M_DAYS);
}
DUK_INTERNAL duk_bool_t duk_bi_date_timeval_in_leeway_range(duk_double_t x) {
return (x >= -DUK_DATE_MSEC_100M_DAYS_LEEWAY && x <= DUK_DATE_MSEC_100M_DAYS_LEEWAY);
}
DUK_INTERNAL duk_bool_t duk_bi_date_year_in_valid_range(duk_double_t x) {
return (x >= DUK_DATE_MIN_ECMA_YEAR && x <= DUK_DATE_MAX_ECMA_YEAR);
}
DUK_LOCAL duk_double_t duk__timeclip(duk_double_t x) {
if (!DUK_ISFINITE(x)) {
return DUK_DOUBLE_NAN;
}
if (!duk_bi_date_timeval_in_valid_range(x)) {
return DUK_DOUBLE_NAN;
}
x = duk_js_tointeger_number(x);
/* Here we'd have the option to normalize -0 to +0. */
return x;
}
/* Integer division which floors also negative values correctly. */
DUK_LOCAL duk_int_t duk__div_floor(duk_int_t a, duk_int_t b) {
DUK_ASSERT(b > 0);
if (a >= 0) {
return a / b;
} else {
/* e.g. a = -4, b = 5 --> -4 - 5 + 1 / 5 --> -8 / 5 --> -1
* a = -5, b = 5 --> -5 - 5 + 1 / 5 --> -9 / 5 --> -1
* a = -6, b = 5 --> -6 - 5 + 1 / 5 --> -10 / 5 --> -2
*/
return (a - b + 1) / b;
}
}
/* Compute day number of the first day of a given year. */
DUK_LOCAL duk_int_t duk__day_from_year(duk_int_t year) {
/* Note: in integer arithmetic, (x / 4) is same as floor(x / 4) for non-negative
* values, but is incorrect for negative ones.
*/
return 365 * (year - 1970)
+ duk__div_floor(year - 1969, 4)
- duk__div_floor(year - 1901, 100)
+ duk__div_floor(year - 1601, 400);
}
/* Given a day number, determine year and day-within-year. */
DUK_LOCAL duk_int_t duk__year_from_day(duk_int_t day, duk_small_int_t *out_day_within_year) {
duk_int_t year;
duk_int_t diff_days;
/* estimate year upwards (towards positive infinity), then back down;
* two iterations should be enough
*/
if (day >= 0) {
year = 1970 + day / 365;
} else {
year = 1970 + day / 366;
}
for (;;) {
diff_days = duk__day_from_year(year) - day;
DUK_DDD(DUK_DDDPRINT("year=%ld day=%ld, diff_days=%ld", (long) year, (long) day, (long) diff_days));
if (diff_days <= 0) {
DUK_ASSERT(-diff_days < 366); /* fits into duk_small_int_t */
*out_day_within_year = -diff_days;
DUK_DDD(DUK_DDDPRINT("--> year=%ld, day-within-year=%ld",
(long) year, (long) *out_day_within_year));
DUK_ASSERT(*out_day_within_year >= 0);
DUK_ASSERT(*out_day_within_year < (duk_bi_date_is_leap_year(year) ? 366 : 365));
return year;
}
/* Note: this is very tricky; we must never 'overshoot' the
* correction downwards.
*/
year -= 1 + (diff_days - 1) / 366; /* conservative */
}
}
/* Given a (year, month, day-within-month) triple, compute day number.
* The input triple is un-normalized and may contain non-finite values.
*/
DUK_LOCAL duk_double_t duk__make_day(duk_double_t year, duk_double_t month, duk_double_t day) {
duk_int_t day_num;
duk_bool_t is_leap;
duk_small_int_t i, n;
/* Assume that year, month, day are all coerced to whole numbers.
* They may also be NaN or infinity, in which case this function
* must return NaN or infinity to ensure time value becomes NaN.
* If 'day' is NaN, the final return will end up returning a NaN,
* so it doesn't need to be checked here.
*/
if (!DUK_ISFINITE(year) || !DUK_ISFINITE(month)) {
return DUK_DOUBLE_NAN;
}
year += DUK_FLOOR(month / 12.0);
month = DUK_FMOD(month, 12.0);
if (month < 0.0) {
/* handle negative values */
month += 12.0;
}
/* The algorithm in E5.1 Section 15.9.1.12 normalizes month, but
* does not normalize the day-of-month (nor check whether or not
* it is finite) because it's not necessary for finding the day
* number which matches the (year,month) pair.
*
* We assume that duk__day_from_year() is exact here.
*
* Without an explicit infinity / NaN check in the beginning,
* day_num would be a bogus integer here.
*
* It's possible for 'year' to be out of integer range here.
* If so, we need to return NaN without integer overflow.
* This fixes test-bug-setyear-overflow.js.
*/
if (!duk_bi_date_year_in_valid_range(year)) {
DUK_DD(DUK_DDPRINT("year not in ecmascript valid range, avoid integer overflow: %lf", (double) year));
return DUK_DOUBLE_NAN;
}
day_num = duk__day_from_year((duk_int_t) year);
is_leap = duk_bi_date_is_leap_year((duk_int_t) year);
n = (duk_small_int_t) month;
for (i = 0; i < n; i++) {
day_num += duk__days_in_month[i];
if (i == 1 && is_leap) {
day_num++;
}
}
/* If 'day' is NaN, returns NaN. */
return (duk_double_t) day_num + day;
}
/* Split time value into parts. The time value is assumed to be an internal
* one, i.e. finite, no fractions. Possible local time adjustment has already
* been applied when reading the time value.
*/
DUK_INTERNAL void duk_bi_date_timeval_to_parts(duk_double_t d, duk_int_t *parts, duk_double_t *dparts, duk_small_uint_t flags) {
duk_double_t d1, d2;
duk_int_t t1, t2;
duk_int_t day_since_epoch;
duk_int_t year; /* does not fit into 16 bits */
duk_small_int_t day_in_year;
duk_small_int_t month;
duk_small_int_t day;
duk_small_int_t dim;
duk_int_t jan1_since_epoch;
duk_small_int_t jan1_weekday;
duk_int_t equiv_year;
duk_small_uint_t i;
duk_bool_t is_leap;
duk_small_int_t arridx;
DUK_ASSERT(DUK_ISFINITE(d)); /* caller checks */
DUK_ASSERT(DUK_FLOOR(d) == d); /* no fractions in internal time */
/* The timevalue must be in valid Ecmascript range, but since a local
* time offset can be applied, we need to allow a +/- 24h leeway to
* the value. In other words, although the UTC time is within the
* Ecmascript range, the local part values can be just outside of it.
*/
DUK_UNREF(duk_bi_date_timeval_in_leeway_range);
DUK_ASSERT(duk_bi_date_timeval_in_leeway_range(d));
/* these computations are guaranteed to be exact for the valid
* E5 time value range, assuming milliseconds without fractions.
*/
d1 = (duk_double_t) DUK_FMOD(d, (double) DUK_DATE_MSEC_DAY);
if (d1 < 0.0) {
/* deal with negative values */
d1 += (duk_double_t) DUK_DATE_MSEC_DAY;
}
d2 = DUK_FLOOR((double) (d / (duk_double_t) DUK_DATE_MSEC_DAY));
DUK_ASSERT(d2 * ((duk_double_t) DUK_DATE_MSEC_DAY) + d1 == d);
/* now expected to fit into a 32-bit integer */
t1 = (duk_int_t) d1;
t2 = (duk_int_t) d2;
day_since_epoch = t2;
DUK_ASSERT((duk_double_t) t1 == d1);
DUK_ASSERT((duk_double_t) t2 == d2);
/* t1 = milliseconds within day (fits 32 bit)
* t2 = day number from epoch (fits 32 bit, may be negative)
*/
parts[DUK_DATE_IDX_MILLISECOND] = t1 % 1000; t1 /= 1000;
parts[DUK_DATE_IDX_SECOND] = t1 % 60; t1 /= 60;
parts[DUK_DATE_IDX_MINUTE] = t1 % 60; t1 /= 60;
parts[DUK_DATE_IDX_HOUR] = t1;
DUK_ASSERT(parts[DUK_DATE_IDX_MILLISECOND] >= 0 && parts[DUK_DATE_IDX_MILLISECOND] <= 999);
DUK_ASSERT(parts[DUK_DATE_IDX_SECOND] >= 0 && parts[DUK_DATE_IDX_SECOND] <= 59);
DUK_ASSERT(parts[DUK_DATE_IDX_MINUTE] >= 0 && parts[DUK_DATE_IDX_MINUTE] <= 59);
DUK_ASSERT(parts[DUK_DATE_IDX_HOUR] >= 0 && parts[DUK_DATE_IDX_HOUR] <= 23);
DUK_DDD(DUK_DDDPRINT("d=%lf, d1=%lf, d2=%lf, t1=%ld, t2=%ld, parts: hour=%ld min=%ld sec=%ld msec=%ld",
(double) d, (double) d1, (double) d2, (long) t1, (long) t2,
(long) parts[DUK_DATE_IDX_HOUR],
(long) parts[DUK_DATE_IDX_MINUTE],
(long) parts[DUK_DATE_IDX_SECOND],
(long) parts[DUK_DATE_IDX_MILLISECOND]));
/* This assert depends on the input parts representing time inside
* the Ecmascript range.
*/
DUK_ASSERT(t2 + DUK__WEEKDAY_MOD_ADDER >= 0);
parts[DUK_DATE_IDX_WEEKDAY] = (t2 + 4 + DUK__WEEKDAY_MOD_ADDER) % 7; /* E5.1 Section 15.9.1.6 */
DUK_ASSERT(parts[DUK_DATE_IDX_WEEKDAY] >= 0 && parts[DUK_DATE_IDX_WEEKDAY] <= 6);
year = duk__year_from_day(t2, &day_in_year);
day = day_in_year;
is_leap = duk_bi_date_is_leap_year(year);
for (month = 0; month < 12; month++) {
dim = duk__days_in_month[month];
if (month == 1 && is_leap) {
dim++;
}
DUK_DDD(DUK_DDDPRINT("month=%ld, dim=%ld, day=%ld",
(long) month, (long) dim, (long) day));
if (day < dim) {
break;
}
day -= dim;
}
DUK_DDD(DUK_DDDPRINT("final month=%ld", (long) month));
DUK_ASSERT(month >= 0 && month <= 11);
DUK_ASSERT(day >= 0 && day <= 31);
/* Equivalent year mapping, used to avoid DST trouble when platform
* may fail to provide reasonable DST answers for dates outside the
* ordinary range (e.g. 1970-2038). An equivalent year has the same
* leap-year-ness as the original year and begins on the same weekday
* (Jan 1).
*
* The year 2038 is avoided because there seem to be problems with it
* on some platforms. The year 1970 is also avoided as there were
* practical problems with it; an equivalent year is used for it too,
* which breaks some DST computations for 1970 right now, see e.g.
* test-bi-date-tzoffset-brute-fi.js.
*/
if ((flags & DUK_DATE_FLAG_EQUIVYEAR) && (year < 1971 || year > 2037)) {
DUK_ASSERT(is_leap == 0 || is_leap == 1);
jan1_since_epoch = day_since_epoch - day_in_year; /* day number for Jan 1 since epoch */
DUK_ASSERT(jan1_since_epoch + DUK__WEEKDAY_MOD_ADDER >= 0);
jan1_weekday = (jan1_since_epoch + 4 + DUK__WEEKDAY_MOD_ADDER) % 7; /* E5.1 Section 15.9.1.6 */
DUK_ASSERT(jan1_weekday >= 0 && jan1_weekday <= 6);
arridx = jan1_weekday;
if (is_leap) {
arridx += 7;
}
DUK_ASSERT(arridx >= 0 && arridx < (duk_small_int_t) (sizeof(duk__date_equivyear) / sizeof(duk_uint8_t)));
equiv_year = (duk_int_t) duk__date_equivyear[arridx] + 1970;
year = equiv_year;
DUK_DDD(DUK_DDDPRINT("equiv year mapping, year=%ld, day_in_year=%ld, day_since_epoch=%ld, "
"jan1_since_epoch=%ld, jan1_weekday=%ld -> equiv year %ld",
(long) year, (long) day_in_year, (long) day_since_epoch,
(long) jan1_since_epoch, (long) jan1_weekday, (long) equiv_year));
}
parts[DUK_DATE_IDX_YEAR] = year;
parts[DUK_DATE_IDX_MONTH] = month;
parts[DUK_DATE_IDX_DAY] = day;
if (flags & DUK_DATE_FLAG_ONEBASED) {
parts[DUK_DATE_IDX_MONTH]++; /* zero-based -> one-based */
parts[DUK_DATE_IDX_DAY]++; /* -""- */
}
if (dparts != NULL) {
for (i = 0; i < DUK_DATE_IDX_NUM_PARTS; i++) {
dparts[i] = (duk_double_t) parts[i];
}
}
}
/* Compute time value from (double) parts. The parts can be either UTC
* or local time; if local, they need to be (conceptually) converted into
* UTC time. The parts may represent valid or invalid time, and may be
* wildly out of range (but may cancel each other and still come out in
* the valid Date range).
*/
DUK_INTERNAL duk_double_t duk_bi_date_get_timeval_from_dparts(duk_double_t *dparts, duk_small_uint_t flags) {
#if defined(DUK_USE_PARANOID_DATE_COMPUTATION)
/* See comments below on MakeTime why these are volatile. */
volatile duk_double_t tmp_time;
volatile duk_double_t tmp_day;
volatile duk_double_t d;
#else
duk_double_t tmp_time;
duk_double_t tmp_day;
duk_double_t d;
#endif
duk_small_uint_t i;
duk_int_t tzoff, tzoffprev1, tzoffprev2;
/* Expects 'this' at top of stack on entry. */
/* Coerce all finite parts with ToInteger(). ToInteger() must not
* be called for NaN/Infinity because it will convert e.g. NaN to
* zero. If ToInteger() has already been called, this has no side
* effects and is idempotent.
*
* Don't read dparts[DUK_DATE_IDX_WEEKDAY]; it will cause Valgrind
* issues if the value is uninitialized.
*/
for (i = 0; i <= DUK_DATE_IDX_MILLISECOND; i++) {
/* SCANBUILD: scan-build complains here about assigned value
* being garbage or undefined. This is correct but operating
* on undefined values has no ill effect and is ignored by the
* caller in the case where this happens.
*/
d = dparts[i];
if (DUK_ISFINITE(d)) {
dparts[i] = duk_js_tointeger_number(d);
}
}
/* Use explicit steps in computation to try to ensure that
* computation happens with intermediate results coerced to
* double values (instead of using something more accurate).
* E.g. E5.1 Section 15.9.1.11 requires use of IEEE 754
* rules (= Ecmascript '+' and '*' operators).
*
* Without 'volatile' even this approach fails on some platform
* and compiler combinations. For instance, gcc 4.8.1 on Ubuntu
* 64-bit, with -m32 and without -std=c99, test-bi-date-canceling.js
* would fail because of some optimizations when computing tmp_time
* (MakeTime below). Adding 'volatile' to tmp_time solved this
* particular problem (annoyingly, also adding debug prints or
* running the executable under valgrind hides it).
*/
/* MakeTime */
tmp_time = 0.0;
tmp_time += dparts[DUK_DATE_IDX_HOUR] * ((duk_double_t) DUK_DATE_MSEC_HOUR);
tmp_time += dparts[DUK_DATE_IDX_MINUTE] * ((duk_double_t) DUK_DATE_MSEC_MINUTE);
tmp_time += dparts[DUK_DATE_IDX_SECOND] * ((duk_double_t) DUK_DATE_MSEC_SECOND);
tmp_time += dparts[DUK_DATE_IDX_MILLISECOND];
/* MakeDay */
tmp_day = duk__make_day(dparts[DUK_DATE_IDX_YEAR], dparts[DUK_DATE_IDX_MONTH], dparts[DUK_DATE_IDX_DAY]);
/* MakeDate */
d = tmp_day * ((duk_double_t) DUK_DATE_MSEC_DAY) + tmp_time;
DUK_DDD(DUK_DDDPRINT("time=%lf day=%lf --> timeval=%lf",
(double) tmp_time, (double) tmp_day, (double) d));
/* Optional UTC conversion. */
if (flags & DUK_DATE_FLAG_LOCALTIME) {
/* DUK_USE_DATE_GET_LOCAL_TZOFFSET() needs to be called with a
* time value computed from UTC parts. At this point we only
* have 'd' which is a time value computed from local parts, so
* it is off by the UTC-to-local time offset which we don't know
* yet. The current solution for computing the UTC-to-local
* time offset is to iterate a few times and detect a fixed
* point or a two-cycle loop (or a sanity iteration limit),
* see test-bi-date-local-parts.js and test-bi-date-tzoffset-basic-fi.js.
*
* E5.1 Section 15.9.1.9:
* UTC(t) = t - LocalTZA - DaylightSavingTA(t - LocalTZA)
*
* For NaN/inf, DUK_USE_DATE_GET_LOCAL_TZOFFSET() returns 0.
*/
#if 0
/* Old solution: don't iterate, incorrect */
tzoff = DUK_USE_DATE_GET_LOCAL_TZOFFSET(d);
DUK_DDD(DUK_DDDPRINT("tzoffset w/o iteration, tzoff=%ld", (long) tzoff));
d -= tzoff * 1000L;
DUK_UNREF(tzoffprev1);
DUK_UNREF(tzoffprev2);
#endif
/* Iteration solution */
tzoff = 0;
tzoffprev1 = 999999999L; /* invalid value which never matches */
for (i = 0; i < DUK__LOCAL_TZOFFSET_MAXITER; i++) {
tzoffprev2 = tzoffprev1;
tzoffprev1 = tzoff;
tzoff = DUK_USE_DATE_GET_LOCAL_TZOFFSET(d - tzoff * 1000L);
DUK_DDD(DUK_DDDPRINT("tzoffset iteration, i=%d, tzoff=%ld, tzoffprev1=%ld tzoffprev2=%ld",
(int) i, (long) tzoff, (long) tzoffprev1, (long) tzoffprev2));
if (tzoff == tzoffprev1) {
DUK_DDD(DUK_DDDPRINT("tzoffset iteration finished, i=%d, tzoff=%ld, tzoffprev1=%ld, tzoffprev2=%ld",
(int) i, (long) tzoff, (long) tzoffprev1, (long) tzoffprev2));
break;
} else if (tzoff == tzoffprev2) {
/* Two value cycle, see e.g. test-bi-date-tzoffset-basic-fi.js.
* In these cases, favor a higher tzoffset to get a consistent
* result which is independent of iteration count. Not sure if
* this is a generically correct solution.
*/
DUK_DDD(DUK_DDDPRINT("tzoffset iteration two-value cycle, i=%d, tzoff=%ld, tzoffprev1=%ld, tzoffprev2=%ld",
(int) i, (long) tzoff, (long) tzoffprev1, (long) tzoffprev2));
if (tzoffprev1 > tzoff) {
tzoff = tzoffprev1;
}
break;
}
}
DUK_DDD(DUK_DDDPRINT("tzoffset iteration, tzoff=%ld", (long) tzoff));
d -= tzoff * 1000L;
}
/* TimeClip(), which also handles Infinity -> NaN conversion */
d = duk__timeclip(d);
return d;
}
/*
* API oriented helpers
*/
/* Push 'this' binding, check that it is a Date object; then push the
* internal time value. At the end, stack is: [ ... this timeval ].
* Returns the time value. Local time adjustment is done if requested.
*/
DUK_LOCAL duk_double_t duk__push_this_get_timeval_tzoffset(duk_context *ctx, duk_small_uint_t flags, duk_int_t *out_tzoffset) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h;
duk_double_t d;
duk_int_t tzoffset = 0;
duk_push_this(ctx);
h = duk_get_hobject(ctx, -1); /* XXX: getter with class check, useful in built-ins */
if (h == NULL || DUK_HOBJECT_GET_CLASS_NUMBER(h) != DUK_HOBJECT_CLASS_DATE) {
DUK_ERROR_TYPE(thr, "expected Date");
}
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_VALUE);
d = duk_to_number(ctx, -1);
duk_pop(ctx);
if (DUK_ISNAN(d)) {
if (flags & DUK_DATE_FLAG_NAN_TO_ZERO) {
d = 0.0;
}
if (flags & DUK_DATE_FLAG_NAN_TO_RANGE_ERROR) {
DUK_ERROR_RANGE(thr, "Invalid Date");
}
}
/* if no NaN handling flag, may still be NaN here, but not Inf */
DUK_ASSERT(!DUK_ISINF(d));
if (flags & DUK_DATE_FLAG_LOCALTIME) {
/* Note: DST adjustment is determined using UTC time.
* If 'd' is NaN, tzoffset will be 0.
*/
tzoffset = DUK_USE_DATE_GET_LOCAL_TZOFFSET(d); /* seconds */
d += tzoffset * 1000L;
}
if (out_tzoffset) {
*out_tzoffset = tzoffset;
}
/* [ ... this ] */
return d;
}
DUK_LOCAL duk_double_t duk__push_this_get_timeval(duk_context *ctx, duk_small_uint_t flags) {
return duk__push_this_get_timeval_tzoffset(ctx, flags, NULL);
}
/* Set timeval to 'this' from dparts, push the new time value onto the
* value stack and return 1 (caller can then tail call us). Expects
* the value stack to contain 'this' on the stack top.
*/
DUK_LOCAL duk_ret_t duk__set_this_timeval_from_dparts(duk_context *ctx, duk_double_t *dparts, duk_small_uint_t flags) {
duk_double_t d;
/* [ ... this ] */
d = duk_bi_date_get_timeval_from_dparts(dparts, flags);
duk_push_number(ctx, d); /* -> [ ... this timeval_new ] */
duk_dup_top(ctx); /* -> [ ... this timeval_new timeval_new ] */
duk_put_prop_stridx(ctx, -3, DUK_STRIDX_INT_VALUE);
/* stack top: new time value, return 1 to allow tail calls */
return 1;
}
/* 'out_buf' must be at least DUK_BI_DATE_ISO8601_BUFSIZE long. */
DUK_LOCAL void duk__format_parts_iso8601(duk_int_t *parts, duk_int_t tzoffset, duk_small_uint_t flags, duk_uint8_t *out_buf) {
char yearstr[8]; /* "-123456\0" */
char tzstr[8]; /* "+11:22\0" */
char sep = (flags & DUK_DATE_FLAG_SEP_T) ? DUK_ASC_UC_T : DUK_ASC_SPACE;
DUK_ASSERT(parts[DUK_DATE_IDX_MONTH] >= 1 && parts[DUK_DATE_IDX_MONTH] <= 12);
DUK_ASSERT(parts[DUK_DATE_IDX_DAY] >= 1 && parts[DUK_DATE_IDX_DAY] <= 31);
DUK_ASSERT(parts[DUK_DATE_IDX_YEAR] >= -999999 && parts[DUK_DATE_IDX_YEAR] <= 999999);
/* Note: %06d for positive value, %07d for negative value to include
* sign and 6 digits.
*/
DUK_SNPRINTF(yearstr,
sizeof(yearstr),
(parts[DUK_DATE_IDX_YEAR] >= 0 && parts[DUK_DATE_IDX_YEAR] <= 9999) ? "%04ld" :
((parts[DUK_DATE_IDX_YEAR] >= 0) ? "+%06ld" : "%07ld"),
(long) parts[DUK_DATE_IDX_YEAR]);
yearstr[sizeof(yearstr) - 1] = (char) 0;
if (flags & DUK_DATE_FLAG_LOCALTIME) {
/* tzoffset seconds are dropped; 16 bits suffice for
* time offset in minutes
*/
if (tzoffset >= 0) {
duk_small_int_t tmp = tzoffset / 60;
DUK_SNPRINTF(tzstr, sizeof(tzstr), "+%02d:%02d", (int) (tmp / 60), (int) (tmp % 60));
} else {
duk_small_int_t tmp = -tzoffset / 60;
DUK_SNPRINTF(tzstr, sizeof(tzstr), "-%02d:%02d", (int) (tmp / 60), (int) (tmp % 60));
}
tzstr[sizeof(tzstr) - 1] = (char) 0;
} else {
tzstr[0] = DUK_ASC_UC_Z;
tzstr[1] = (char) 0;
}
/* Unlike year, the other parts fit into 16 bits so %d format
* is portable.
*/
if ((flags & DUK_DATE_FLAG_TOSTRING_DATE) && (flags & DUK_DATE_FLAG_TOSTRING_TIME)) {
DUK_SPRINTF((char *) out_buf, "%s-%02d-%02d%c%02d:%02d:%02d.%03d%s",
(const char *) yearstr, (int) parts[DUK_DATE_IDX_MONTH], (int) parts[DUK_DATE_IDX_DAY], (int) sep,
(int) parts[DUK_DATE_IDX_HOUR], (int) parts[DUK_DATE_IDX_MINUTE],
(int) parts[DUK_DATE_IDX_SECOND], (int) parts[DUK_DATE_IDX_MILLISECOND], (const char *) tzstr);
} else if (flags & DUK_DATE_FLAG_TOSTRING_DATE) {
DUK_SPRINTF((char *) out_buf, "%s-%02d-%02d",
(const char *) yearstr, (int) parts[DUK_DATE_IDX_MONTH], (int) parts[DUK_DATE_IDX_DAY]);
} else {
DUK_ASSERT(flags & DUK_DATE_FLAG_TOSTRING_TIME);
DUK_SPRINTF((char *) out_buf, "%02d:%02d:%02d.%03d%s",
(int) parts[DUK_DATE_IDX_HOUR], (int) parts[DUK_DATE_IDX_MINUTE],
(int) parts[DUK_DATE_IDX_SECOND], (int) parts[DUK_DATE_IDX_MILLISECOND],
(const char *) tzstr);
}
}
/* Helper for string conversion calls: check 'this' binding, get the
* internal time value, and format date and/or time in a few formats.
* Return value allows tail calls.
*/
DUK_LOCAL duk_ret_t duk__to_string_helper(duk_context *ctx, duk_small_uint_t flags) {
duk_double_t d;
duk_int_t parts[DUK_DATE_IDX_NUM_PARTS];
duk_int_t tzoffset; /* seconds, doesn't fit into 16 bits */
duk_bool_t rc;
duk_uint8_t buf[DUK_BI_DATE_ISO8601_BUFSIZE];
DUK_UNREF(rc); /* unreferenced with some options */
d = duk__push_this_get_timeval_tzoffset(ctx, flags, &tzoffset);
if (DUK_ISNAN(d)) {
duk_push_hstring_stridx(ctx, DUK_STRIDX_INVALID_DATE);
return 1;
}
DUK_ASSERT(DUK_ISFINITE(d));
/* formatters always get one-based month/day-of-month */
duk_bi_date_timeval_to_parts(d, parts, NULL, DUK_DATE_FLAG_ONEBASED);
DUK_ASSERT(parts[DUK_DATE_IDX_MONTH] >= 1 && parts[DUK_DATE_IDX_MONTH] <= 12);
DUK_ASSERT(parts[DUK_DATE_IDX_DAY] >= 1 && parts[DUK_DATE_IDX_DAY] <= 31);
if (flags & DUK_DATE_FLAG_TOSTRING_LOCALE) {
/* try locale specific formatter; if it refuses to format the
* string, fall back to an ISO 8601 formatted value in local
* time.
*/
#if defined(DUK_USE_DATE_FORMAT_STRING)
/* Contract, either:
* - Push string to value stack and return 1
* - Don't push anything and return 0
*/
rc = DUK_USE_DATE_FORMAT_STRING(ctx, parts, tzoffset, flags);
if (rc != 0) {
return 1;
}
#else
/* No locale specific formatter; this is OK, we fall back
* to ISO 8601.
*/
#endif
}
/* Different calling convention than above used because the helper
* is shared.
*/
duk__format_parts_iso8601(parts, tzoffset, flags, buf);
duk_push_string(ctx, (const char *) buf);
return 1;
}
/* Helper for component getter calls: check 'this' binding, get the
* internal time value, split it into parts (either as UTC time or
* local time), push a specified component as a return value to the
* value stack and return 1 (caller can then tail call us).
*/
DUK_LOCAL duk_ret_t duk__get_part_helper(duk_context *ctx, duk_small_uint_t flags_and_idx) {
duk_double_t d;
duk_int_t parts[DUK_DATE_IDX_NUM_PARTS];
duk_small_uint_t idx_part = (duk_small_uint_t) (flags_and_idx >> DUK_DATE_FLAG_VALUE_SHIFT); /* unpack args */
DUK_ASSERT_DISABLE(idx_part >= 0); /* unsigned */
DUK_ASSERT(idx_part < DUK_DATE_IDX_NUM_PARTS);
d = duk__push_this_get_timeval(ctx, flags_and_idx);
if (DUK_ISNAN(d)) {
duk_push_nan(ctx);
return 1;
}
DUK_ASSERT(DUK_ISFINITE(d));
duk_bi_date_timeval_to_parts(d, parts, NULL, flags_and_idx); /* no need to mask idx portion */
/* Setter APIs detect special year numbers (0...99) and apply a +1900
* only in certain cases. The legacy getYear() getter applies -1900
* unconditionally.
*/
duk_push_int(ctx, (flags_and_idx & DUK_DATE_FLAG_SUB1900) ? parts[idx_part] - 1900 : parts[idx_part]);
return 1;
}
/* Helper for component setter calls: check 'this' binding, get the
* internal time value, split it into parts (either as UTC time or
* local time), modify one or more components as specified, recompute
* the time value, set it as the internal value. Finally, push the
* new time value as a return value to the value stack and return 1
* (caller can then tail call us).
*/
DUK_LOCAL duk_ret_t duk__set_part_helper(duk_context *ctx, duk_small_uint_t flags_and_maxnargs) {
duk_double_t d;
duk_int_t parts[DUK_DATE_IDX_NUM_PARTS];
duk_double_t dparts[DUK_DATE_IDX_NUM_PARTS];
duk_idx_t nargs;
duk_small_uint_t maxnargs = (duk_small_uint_t) (flags_and_maxnargs >> DUK_DATE_FLAG_VALUE_SHIFT); /* unpack args */
duk_small_uint_t idx_first, idx;
duk_small_uint_t i;
nargs = duk_get_top(ctx);
d = duk__push_this_get_timeval(ctx, flags_and_maxnargs);
DUK_ASSERT(DUK_ISFINITE(d) || DUK_ISNAN(d));
if (DUK_ISFINITE(d)) {
duk_bi_date_timeval_to_parts(d, parts, dparts, flags_and_maxnargs);
} else {
/* NaN timevalue: we need to coerce the arguments, but
* the resulting internal timestamp needs to remain NaN.
* This works but is not pretty: parts and dparts will
* be partially uninitialized, but we only write to them.
*/
}
/*
* Determining which datetime components to overwrite based on
* stack arguments is a bit complicated, but important to factor
* out from setters themselves for compactness.
*
* If DUK_DATE_FLAG_TIMESETTER, maxnargs indicates setter type:
*
* 1 -> millisecond
* 2 -> second, [millisecond]
* 3 -> minute, [second], [millisecond]
* 4 -> hour, [minute], [second], [millisecond]
*
* Else:
*
* 1 -> date
* 2 -> month, [date]
* 3 -> year, [month], [date]
*
* By comparing nargs and maxnargs (and flags) we know which
* components to override. We rely on part index ordering.
*/
if (flags_and_maxnargs & DUK_DATE_FLAG_TIMESETTER) {
DUK_ASSERT(maxnargs >= 1 && maxnargs <= 4);
idx_first = DUK_DATE_IDX_MILLISECOND - (maxnargs - 1);
} else {
DUK_ASSERT(maxnargs >= 1 && maxnargs <= 3);
idx_first = DUK_DATE_IDX_DAY - (maxnargs - 1);
}
DUK_ASSERT_DISABLE(idx_first >= 0); /* unsigned */
DUK_ASSERT(idx_first < DUK_DATE_IDX_NUM_PARTS);
for (i = 0; i < maxnargs; i++) {
if ((duk_idx_t) i >= nargs) {
/* no argument given -> leave components untouched */
break;
}
idx = idx_first + i;
DUK_ASSERT_DISABLE(idx >= 0); /* unsigned */
DUK_ASSERT(idx < DUK_DATE_IDX_NUM_PARTS);
if (idx == DUK_DATE_IDX_YEAR && (flags_and_maxnargs & DUK_DATE_FLAG_YEAR_FIXUP)) {
duk__twodigit_year_fixup(ctx, (duk_idx_t) i);
}
dparts[idx] = duk_to_number(ctx, i);
if (idx == DUK_DATE_IDX_DAY) {
/* Day-of-month is one-based in the API, but zero-based
* internally, so fix here. Note that month is zero-based
* both in the API and internally.
*/
/* SCANBUILD: complains about use of uninitialized values.
* The complaint is correct, but operating in undefined
* values here is intentional in some cases and the caller
* ignores the results.
*/
dparts[idx] -= 1.0;
}
}
/* Leaves new timevalue on stack top and returns 1, which is correct
* for part setters.
*/
if (DUK_ISFINITE(d)) {
return duk__set_this_timeval_from_dparts(ctx, dparts, flags_and_maxnargs);
} else {
/* Internal timevalue is already NaN, so don't touch it. */
duk_push_nan(ctx);
return 1;
}
}
/* Apply ToNumber() to specified index; if ToInteger(val) in [0,99], add
* 1900 and replace value at idx_val.
*/
DUK_LOCAL void duk__twodigit_year_fixup(duk_context *ctx, duk_idx_t idx_val) {
duk_double_t d;
/* XXX: idx_val would fit into 16 bits, but using duk_small_uint_t
* might not generate better code due to casting.
*/
/* E5 Sections 15.9.3.1, B.2.4, B.2.5 */
duk_to_number(ctx, idx_val);
if (duk_is_nan(ctx, idx_val)) {
return;
}
duk_dup(ctx, idx_val);
duk_to_int(ctx, -1);
d = duk_get_number(ctx, -1); /* get as double to handle huge numbers correctly */
if (d >= 0.0 && d <= 99.0) {
d += 1900.0;
duk_push_number(ctx, d);
duk_replace(ctx, idx_val);
}
duk_pop(ctx);
}
/* Set datetime parts from stack arguments, defaulting any missing values.
* Day-of-week is not set; it is not required when setting the time value.
*/
DUK_LOCAL void duk__set_parts_from_args(duk_context *ctx, duk_double_t *dparts, duk_idx_t nargs) {
duk_double_t d;
duk_small_uint_t i;
duk_small_uint_t idx;
/* Causes a ToNumber() coercion, but doesn't break coercion order since
* year is coerced first anyway.
*/
duk__twodigit_year_fixup(ctx, 0);
/* There are at most 7 args, but we use 8 here so that also
* DUK_DATE_IDX_WEEKDAY gets initialized (to zero) to avoid the potential
* for any Valgrind gripes later.
*/
for (i = 0; i < 8; i++) {
/* Note: rely on index ordering */
idx = DUK_DATE_IDX_YEAR + i;
if ((duk_idx_t) i < nargs) {
d = duk_to_number(ctx, (duk_idx_t) i);
if (idx == DUK_DATE_IDX_DAY) {
/* Convert day from one-based to zero-based (internal). This may
* cause the day part to be negative, which is OK.
*/
d -= 1.0;
}
} else {
/* All components default to 0 except day-of-month which defaults
* to 1. However, because our internal day-of-month is zero-based,
* it also defaults to zero here.
*/
d = 0.0;
}
dparts[idx] = d;
}
DUK_DDD(DUK_DDDPRINT("parts from args -> %lf %lf %lf %lf %lf %lf %lf %lf",
(double) dparts[0], (double) dparts[1],
(double) dparts[2], (double) dparts[3],
(double) dparts[4], (double) dparts[5],
(double) dparts[6], (double) dparts[7]));
}
/*
* Helper to format a time value into caller buffer, used by logging.
* 'out_buf' must be at least DUK_BI_DATE_ISO8601_BUFSIZE long.
*/
DUK_INTERNAL void duk_bi_date_format_timeval(duk_double_t timeval, duk_uint8_t *out_buf) {
duk_int_t parts[DUK_DATE_IDX_NUM_PARTS];
duk_bi_date_timeval_to_parts(timeval,
parts,
NULL,
DUK_DATE_FLAG_ONEBASED);
duk__format_parts_iso8601(parts,
0 /*tzoffset*/,
DUK_DATE_FLAG_TOSTRING_DATE |
DUK_DATE_FLAG_TOSTRING_TIME |
DUK_DATE_FLAG_SEP_T /*flags*/,
out_buf);
}
/*
* Indirect magic value lookup for Date methods.
*
* Date methods don't put their control flags into the function magic value
* because they wouldn't fit into a LIGHTFUNC's magic field. Instead, the
* magic value is set to an index pointing to the array of control flags
* below.
*
* This must be kept in strict sync with genbuiltins.py!
*/
static duk_uint16_t duk__date_magics[] = {
/* 0: toString */
DUK_DATE_FLAG_TOSTRING_DATE + DUK_DATE_FLAG_TOSTRING_TIME + DUK_DATE_FLAG_LOCALTIME,
/* 1: toDateString */
DUK_DATE_FLAG_TOSTRING_DATE + DUK_DATE_FLAG_LOCALTIME,
/* 2: toTimeString */
DUK_DATE_FLAG_TOSTRING_TIME + DUK_DATE_FLAG_LOCALTIME,
/* 3: toLocaleString */
DUK_DATE_FLAG_TOSTRING_DATE + DUK_DATE_FLAG_TOSTRING_TIME + DUK_DATE_FLAG_TOSTRING_LOCALE + DUK_DATE_FLAG_LOCALTIME,
/* 4: toLocaleDateString */
DUK_DATE_FLAG_TOSTRING_DATE + DUK_DATE_FLAG_TOSTRING_LOCALE + DUK_DATE_FLAG_LOCALTIME,
/* 5: toLocaleTimeString */
DUK_DATE_FLAG_TOSTRING_TIME + DUK_DATE_FLAG_TOSTRING_LOCALE + DUK_DATE_FLAG_LOCALTIME,
/* 6: toUTCString */
DUK_DATE_FLAG_TOSTRING_DATE + DUK_DATE_FLAG_TOSTRING_TIME,
/* 7: toISOString */
DUK_DATE_FLAG_TOSTRING_DATE + DUK_DATE_FLAG_TOSTRING_TIME + DUK_DATE_FLAG_NAN_TO_RANGE_ERROR + DUK_DATE_FLAG_SEP_T,
/* 8: getFullYear */
DUK_DATE_FLAG_LOCALTIME + (DUK_DATE_IDX_YEAR << DUK_DATE_FLAG_VALUE_SHIFT),
/* 9: getUTCFullYear */
0 + (DUK_DATE_IDX_YEAR << DUK_DATE_FLAG_VALUE_SHIFT),
/* 10: getMonth */
DUK_DATE_FLAG_LOCALTIME + (DUK_DATE_IDX_MONTH << DUK_DATE_FLAG_VALUE_SHIFT),
/* 11: getUTCMonth */
0 + (DUK_DATE_IDX_MONTH << DUK_DATE_FLAG_VALUE_SHIFT),
/* 12: getDate */
DUK_DATE_FLAG_ONEBASED + DUK_DATE_FLAG_LOCALTIME + (DUK_DATE_IDX_DAY << DUK_DATE_FLAG_VALUE_SHIFT),
/* 13: getUTCDate */
DUK_DATE_FLAG_ONEBASED + (DUK_DATE_IDX_DAY << DUK_DATE_FLAG_VALUE_SHIFT),
/* 14: getDay */
DUK_DATE_FLAG_LOCALTIME + (DUK_DATE_IDX_WEEKDAY << DUK_DATE_FLAG_VALUE_SHIFT),
/* 15: getUTCDay */
0 + (DUK_DATE_IDX_WEEKDAY << DUK_DATE_FLAG_VALUE_SHIFT),
/* 16: getHours */
DUK_DATE_FLAG_LOCALTIME + (DUK_DATE_IDX_HOUR << DUK_DATE_FLAG_VALUE_SHIFT),
/* 17: getUTCHours */
0 + (DUK_DATE_IDX_HOUR << DUK_DATE_FLAG_VALUE_SHIFT),
/* 18: getMinutes */
DUK_DATE_FLAG_LOCALTIME + (DUK_DATE_IDX_MINUTE << DUK_DATE_FLAG_VALUE_SHIFT),
/* 19: getUTCMinutes */
0 + (DUK_DATE_IDX_MINUTE << DUK_DATE_FLAG_VALUE_SHIFT),
/* 20: getSeconds */
DUK_DATE_FLAG_LOCALTIME + (DUK_DATE_IDX_SECOND << DUK_DATE_FLAG_VALUE_SHIFT),
/* 21: getUTCSeconds */
0 + (DUK_DATE_IDX_SECOND << DUK_DATE_FLAG_VALUE_SHIFT),
/* 22: getMilliseconds */
DUK_DATE_FLAG_LOCALTIME + (DUK_DATE_IDX_MILLISECOND << DUK_DATE_FLAG_VALUE_SHIFT),
/* 23: getUTCMilliseconds */
0 + (DUK_DATE_IDX_MILLISECOND << DUK_DATE_FLAG_VALUE_SHIFT),
/* 24: setMilliseconds */
DUK_DATE_FLAG_TIMESETTER + DUK_DATE_FLAG_LOCALTIME + (1 << DUK_DATE_FLAG_VALUE_SHIFT),
/* 25: setUTCMilliseconds */
DUK_DATE_FLAG_TIMESETTER + (1 << DUK_DATE_FLAG_VALUE_SHIFT),
/* 26: setSeconds */
DUK_DATE_FLAG_TIMESETTER + DUK_DATE_FLAG_LOCALTIME + (2 << DUK_DATE_FLAG_VALUE_SHIFT),
/* 27: setUTCSeconds */
DUK_DATE_FLAG_TIMESETTER + (2 << DUK_DATE_FLAG_VALUE_SHIFT),
/* 28: setMinutes */
DUK_DATE_FLAG_TIMESETTER + DUK_DATE_FLAG_LOCALTIME + (3 << DUK_DATE_FLAG_VALUE_SHIFT),
/* 29: setUTCMinutes */
DUK_DATE_FLAG_TIMESETTER + (3 << DUK_DATE_FLAG_VALUE_SHIFT),
/* 30: setHours */
DUK_DATE_FLAG_TIMESETTER + DUK_DATE_FLAG_LOCALTIME + (4 << DUK_DATE_FLAG_VALUE_SHIFT),
/* 31: setUTCHours */
DUK_DATE_FLAG_TIMESETTER + (4 << DUK_DATE_FLAG_VALUE_SHIFT),
/* 32: setDate */
DUK_DATE_FLAG_LOCALTIME + (1 << DUK_DATE_FLAG_VALUE_SHIFT),
/* 33: setUTCDate */
0 + (1 << DUK_DATE_FLAG_VALUE_SHIFT),
/* 34: setMonth */
DUK_DATE_FLAG_LOCALTIME + (2 << DUK_DATE_FLAG_VALUE_SHIFT),
/* 35: setUTCMonth */
0 + (2 << DUK_DATE_FLAG_VALUE_SHIFT),
/* 36: setFullYear */
DUK_DATE_FLAG_NAN_TO_ZERO + DUK_DATE_FLAG_LOCALTIME + (3 << DUK_DATE_FLAG_VALUE_SHIFT),
/* 37: setUTCFullYear */
DUK_DATE_FLAG_NAN_TO_ZERO + (3 << DUK_DATE_FLAG_VALUE_SHIFT),
/* 38: getYear */
DUK_DATE_FLAG_LOCALTIME + DUK_DATE_FLAG_SUB1900 + (DUK_DATE_IDX_YEAR << DUK_DATE_FLAG_VALUE_SHIFT),
/* 39: setYear */
DUK_DATE_FLAG_NAN_TO_ZERO + DUK_DATE_FLAG_YEAR_FIXUP + (3 << DUK_DATE_FLAG_VALUE_SHIFT),
};
DUK_LOCAL duk_small_uint_t duk__date_get_indirect_magic(duk_context *ctx) {
duk_small_int_t magicidx = (duk_small_uint_t) duk_get_current_magic(ctx);
DUK_ASSERT(magicidx >= 0 && magicidx < (duk_small_int_t) (sizeof(duk__date_magics) / sizeof(duk_uint16_t)));
return (duk_small_uint_t) duk__date_magics[magicidx];
}
/*
* Constructor calls
*/
DUK_INTERNAL duk_ret_t duk_bi_date_constructor(duk_context *ctx) {
duk_idx_t nargs = duk_get_top(ctx);
duk_bool_t is_cons = duk_is_constructor_call(ctx);
duk_double_t dparts[DUK_DATE_IDX_NUM_PARTS];
duk_double_t d;
DUK_DDD(DUK_DDDPRINT("Date constructor, nargs=%ld, is_cons=%ld", (long) nargs, (long) is_cons));
duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_DATE),
DUK_BIDX_DATE_PROTOTYPE);
/* Unlike most built-ins, the internal [[PrimitiveValue]] of a Date
* is mutable.
*/
if (nargs == 0 || !is_cons) {
d = duk__timeclip(DUK_USE_DATE_GET_NOW(ctx));
duk_push_number(ctx, d);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_W);
if (!is_cons) {
/* called as a normal function: return new Date().toString() */
duk_to_string(ctx, -1);
}
return 1;
} else if (nargs == 1) {
duk_to_primitive(ctx, 0, DUK_HINT_NONE);
if (duk_is_string(ctx, 0)) {
duk__parse_string(ctx, duk_to_string(ctx, 0));
duk_replace(ctx, 0); /* may be NaN */
}
d = duk__timeclip(duk_to_number(ctx, 0));
duk_push_number(ctx, d);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_W);
return 1;
}
duk__set_parts_from_args(ctx, dparts, nargs);
/* Parts are in local time, convert when setting. */
(void) duk__set_this_timeval_from_dparts(ctx, dparts, DUK_DATE_FLAG_LOCALTIME /*flags*/); /* -> [ ... this timeval ] */
duk_pop(ctx); /* -> [ ... this ] */
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_date_constructor_parse(duk_context *ctx) {
return duk__parse_string(ctx, duk_to_string(ctx, 0));
}
DUK_INTERNAL duk_ret_t duk_bi_date_constructor_utc(duk_context *ctx) {
duk_idx_t nargs = duk_get_top(ctx);
duk_double_t dparts[DUK_DATE_IDX_NUM_PARTS];
duk_double_t d;
/* Behavior for nargs < 2 is implementation dependent: currently we'll
* set a NaN time value (matching V8 behavior) in this case.
*/
if (nargs < 2) {
duk_push_nan(ctx);
} else {
duk__set_parts_from_args(ctx, dparts, nargs);
d = duk_bi_date_get_timeval_from_dparts(dparts, 0 /*flags*/);
duk_push_number(ctx, d);
}
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_date_constructor_now(duk_context *ctx) {
duk_double_t d;
d = DUK_USE_DATE_GET_NOW(ctx);
DUK_ASSERT(duk__timeclip(d) == d); /* TimeClip() should never be necessary */
duk_push_number(ctx, d);
return 1;
}
/*
* String/JSON conversions
*
* Human readable conversions are now basically ISO 8601 with a space
* (instead of 'T') as the date/time separator. This is a good baseline
* and is platform independent.
*
* A shared native helper to provide many conversions. Magic value contains
* a set of flags. The helper provides:
*
* toString()
* toDateString()
* toTimeString()
* toLocaleString()
* toLocaleDateString()
* toLocaleTimeString()
* toUTCString()
* toISOString()
*
* Notes:
*
* - Date.prototype.toGMTString() and Date.prototype.toUTCString() are
* required to be the same Ecmascript function object (!), so it is
* omitted from here.
*
* - Date.prototype.toUTCString(): E5.1 specification does not require a
* specific format, but result should be human readable. The
* specification suggests using ISO 8601 format with a space (instead
* of 'T') separator if a more human readable format is not available.
*
* - Date.prototype.toISOString(): unlike other conversion functions,
* toISOString() requires a RangeError for invalid date values.
*/
DUK_INTERNAL duk_ret_t duk_bi_date_prototype_tostring_shared(duk_context *ctx) {
duk_small_uint_t flags = duk__date_get_indirect_magic(ctx);
return duk__to_string_helper(ctx, flags);
}
DUK_INTERNAL duk_ret_t duk_bi_date_prototype_value_of(duk_context *ctx) {
/* This native function is also used for Date.prototype.getTime()
* as their behavior is identical.
*/
duk_double_t d = duk__push_this_get_timeval(ctx, 0 /*flags*/); /* -> [ this ] */
DUK_ASSERT(DUK_ISFINITE(d) || DUK_ISNAN(d));
duk_push_number(ctx, d);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_date_prototype_to_json(duk_context *ctx) {
/* Note: toJSON() is a generic function which works even if 'this'
* is not a Date. The sole argument is ignored.
*/
duk_push_this(ctx);
duk_to_object(ctx, -1);
duk_dup_top(ctx);
duk_to_primitive(ctx, -1, DUK_HINT_NUMBER);
if (duk_is_number(ctx, -1)) {
duk_double_t d = duk_get_number(ctx, -1);
if (!DUK_ISFINITE(d)) {
duk_push_null(ctx);
return 1;
}
}
duk_pop(ctx);
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_TO_ISO_STRING);
duk_dup(ctx, -2); /* -> [ O toIsoString O ] */
duk_call_method(ctx, 0);
return 1;
}
/*
* Getters.
*
* Implementing getters is quite easy. The internal time value is either
* NaN, or represents milliseconds (without fractions) from Jan 1, 1970.
* The internal time value can be converted to integer parts, and each
* part will be normalized and will fit into a 32-bit signed integer.
*
* A shared native helper to provide all getters. Magic value contains
* a set of flags and also packs the date component index argument. The
* helper provides:
*
* getFullYear()
* getUTCFullYear()
* getMonth()
* getUTCMonth()
* getDate()
* getUTCDate()
* getDay()
* getUTCDay()
* getHours()
* getUTCHours()
* getMinutes()
* getUTCMinutes()
* getSeconds()
* getUTCSeconds()
* getMilliseconds()
* getUTCMilliseconds()
* getYear()
*
* Notes:
*
* - Date.prototype.getDate(): 'date' means day-of-month, and is
* zero-based in internal calculations but public API expects it to
* be one-based.
*
* - Date.prototype.getTime() and Date.prototype.valueOf() have identical
* behavior. They have separate function objects, but share the same C
* function (duk_bi_date_prototype_value_of).
*/
DUK_INTERNAL duk_ret_t duk_bi_date_prototype_get_shared(duk_context *ctx) {
duk_small_uint_t flags_and_idx = duk__date_get_indirect_magic(ctx);
return duk__get_part_helper(ctx, flags_and_idx);
}
DUK_INTERNAL duk_ret_t duk_bi_date_prototype_get_timezone_offset(duk_context *ctx) {
/*
* Return (t - LocalTime(t)) in minutes:
*
* t - LocalTime(t) = t - (t + LocalTZA + DaylightSavingTA(t))
* = -(LocalTZA + DaylightSavingTA(t))
*
* where DaylightSavingTA() is checked for time 't'.
*
* Note that the sign of the result is opposite to common usage,
* e.g. for EE(S)T which normally is +2h or +3h from UTC, this
* function returns -120 or -180.
*
*/
duk_double_t d;
duk_int_t tzoffset;
/* Note: DST adjustment is determined using UTC time. */
d = duk__push_this_get_timeval(ctx, 0 /*flags*/);
DUK_ASSERT(DUK_ISFINITE(d) || DUK_ISNAN(d));
if (DUK_ISNAN(d)) {
duk_push_nan(ctx);
} else {
DUK_ASSERT(DUK_ISFINITE(d));
tzoffset = DUK_USE_DATE_GET_LOCAL_TZOFFSET(d);
duk_push_int(ctx, -tzoffset / 60);
}
return 1;
}
/*
* Setters.
*
* Setters are a bit more complicated than getters. Component setters
* break down the current time value into its (normalized) component
* parts, replace one or more components with -unnormalized- new values,
* and the components are then converted back into a time value. As an
* example of using unnormalized values:
*
* var d = new Date(1234567890);
*
* is equivalent to:
*
* var d = new Date(0);
* d.setUTCMilliseconds(1234567890);
*
* A shared native helper to provide almost all setters. Magic value
* contains a set of flags and also packs the "maxnargs" argument. The
* helper provides:
*
* setMilliseconds()
* setUTCMilliseconds()
* setSeconds()
* setUTCSeconds()
* setMinutes()
* setUTCMinutes()
* setHours()
* setUTCHours()
* setDate()
* setUTCDate()
* setMonth()
* setUTCMonth()
* setFullYear()
* setUTCFullYear()
* setYear()
*
* Notes:
*
* - Date.prototype.setYear() (Section B addition): special year check
* is omitted. NaN / Infinity will just flow through and ultimately
* result in a NaN internal time value.
*
* - Date.prototype.setYear() does not have optional arguments for
* setting month and day-in-month (like setFullYear()), but we indicate
* 'maxnargs' to be 3 to get the year written to the correct component
* index in duk__set_part_helper(). The function has nargs == 1, so only
* the year will be set regardless of actual argument count.
*/
DUK_INTERNAL duk_ret_t duk_bi_date_prototype_set_shared(duk_context *ctx) {
duk_small_uint_t flags_and_maxnargs = duk__date_get_indirect_magic(ctx);
return duk__set_part_helper(ctx, flags_and_maxnargs);
}
DUK_INTERNAL duk_ret_t duk_bi_date_prototype_set_time(duk_context *ctx) {
duk_double_t d;
(void) duk__push_this_get_timeval(ctx, 0 /*flags*/); /* -> [ timeval this ] */
d = duk__timeclip(duk_to_number(ctx, 0));
duk_push_number(ctx, d);
duk_dup_top(ctx);
duk_put_prop_stridx(ctx, -3, DUK_STRIDX_INT_VALUE); /* -> [ timeval this timeval ] */
return 1;
}
#line 1 "duk_bi_date_unix.c"
/*
* Unix-like Date providers
*
* Generally useful Unix / POSIX / ANSI Date providers.
*/
/* include removed: duk_internal.h */
/* The necessary #includes are in place in duk_config.h. */
/* Buffer sizes for some UNIX calls. Larger than strictly necessary
* to avoid Valgrind errors.
*/
#define DUK__STRPTIME_BUF_SIZE 64
#define DUK__STRFTIME_BUF_SIZE 64
#if defined(DUK_USE_DATE_NOW_GETTIMEOFDAY)
/* Get current Ecmascript time (= UNIX/Posix time, but in milliseconds). */
DUK_INTERNAL duk_double_t duk_bi_date_get_now_gettimeofday(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
struct timeval tv;
duk_double_t d;
if (gettimeofday(&tv, NULL) != 0) {
DUK_ERROR_INTERNAL_DEFMSG(thr);
}
d = ((duk_double_t) tv.tv_sec) * 1000.0 +
((duk_double_t) (tv.tv_usec / 1000));
DUK_ASSERT(DUK_FLOOR(d) == d); /* no fractions */
return d;
}
#endif /* DUK_USE_DATE_NOW_GETTIMEOFDAY */
#if defined(DUK_USE_DATE_NOW_TIME)
/* Not a very good provider: only full seconds are available. */
DUK_INTERNAL duk_double_t duk_bi_date_get_now_time(duk_context *ctx) {
time_t t;
DUK_UNREF(ctx);
t = time(NULL);
return ((duk_double_t) t) * 1000.0;
}
#endif /* DUK_USE_DATE_NOW_TIME */
#if defined(DUK_USE_DATE_TZO_GMTIME) || defined(DUK_USE_DATE_TZO_GMTIME_R)
/* Get local time offset (in seconds) for a certain (UTC) instant 'd'. */
DUK_INTERNAL duk_int_t duk_bi_date_get_local_tzoffset_gmtime(duk_double_t d) {
time_t t, t1, t2;
duk_int_t parts[DUK_DATE_IDX_NUM_PARTS];
duk_double_t dparts[DUK_DATE_IDX_NUM_PARTS];
struct tm tms[2];
#ifdef DUK_USE_DATE_TZO_GMTIME
struct tm *tm_ptr;
#endif
/* For NaN/inf, the return value doesn't matter. */
if (!DUK_ISFINITE(d)) {
return 0;
}
/* If not within Ecmascript range, some integer time calculations
* won't work correctly (and some asserts will fail), so bail out
* if so. This fixes test-bug-date-insane-setyear.js. There is
* a +/- 24h leeway in this range check to avoid a test262 corner
* case documented in test-bug-date-timeval-edges.js.
*/
if (!duk_bi_date_timeval_in_leeway_range(d)) {
DUK_DD(DUK_DDPRINT("timeval not within valid range, skip tzoffset computation to avoid integer overflows"));
return 0;
}
/*
* This is a bit tricky to implement portably. The result depends
* on the timestamp (specifically, DST depends on the timestamp).
* If e.g. UNIX APIs are used, they'll have portability issues with
* very small and very large years.
*
* Current approach:
*
* - Stay within portable UNIX limits by using equivalent year mapping.
* Avoid year 1970 and 2038 as some conversions start to fail, at
* least on some platforms. Avoiding 1970 means that there are
* currently DST discrepancies for 1970.
*
* - Create a UTC and local time breakdowns from 't'. Then create
* a time_t using gmtime() and localtime() and compute the time
* difference between the two.
*
* Equivalent year mapping (E5 Section 15.9.1.8):
*
* If the host environment provides functionality for determining
* daylight saving time, the implementation of ECMAScript is free
* to map the year in question to an equivalent year (same
* leap-year-ness and same starting week day for the year) for which
* the host environment provides daylight saving time information.
* The only restriction is that all equivalent years should produce
* the same result.
*
* This approach is quite reasonable but not entirely correct, e.g.
* the specification also states (E5 Section 15.9.1.8):
*
* The implementation of ECMAScript should not try to determine
* whether the exact time was subject to daylight saving time, but
* just whether daylight saving time would have been in effect if
* the _current daylight saving time algorithm_ had been used at the
* time. This avoids complications such as taking into account the
* years that the locale observed daylight saving time year round.
*
* Since we rely on the platform APIs for conversions between local
* time and UTC, we can't guarantee the above. Rather, if the platform
* has historical DST rules they will be applied. This seems to be the
* general preferred direction in Ecmascript standardization (or at least
* implementations) anyway, and even the equivalent year mapping should
* be disabled if the platform is known to handle DST properly for the
* full Ecmascript range.
*
* The following has useful discussion and links:
*
* https://bugzilla.mozilla.org/show_bug.cgi?id=351066
*/
duk_bi_date_timeval_to_parts(d, parts, dparts, DUK_DATE_FLAG_EQUIVYEAR /*flags*/);
DUK_ASSERT(parts[DUK_DATE_IDX_YEAR] >= 1970 && parts[DUK_DATE_IDX_YEAR] <= 2038);
d = duk_bi_date_get_timeval_from_dparts(dparts, 0 /*flags*/);
DUK_ASSERT(d >= 0 && d < 2147483648.0 * 1000.0); /* unsigned 31-bit range */
t = (time_t) (d / 1000.0);
DUK_DDD(DUK_DDDPRINT("timeval: %lf -> time_t %ld", (double) d, (long) t));
DUK_MEMZERO((void *) tms, sizeof(struct tm) * 2);
#if defined(DUK_USE_DATE_TZO_GMTIME_R)
(void) gmtime_r(&t, &tms[0]);
(void) localtime_r(&t, &tms[1]);
#elif defined(DUK_USE_DATE_TZO_GMTIME)
tm_ptr = gmtime(&t);
DUK_MEMCPY((void *) &tms[0], tm_ptr, sizeof(struct tm));
tm_ptr = localtime(&t);
DUK_MEMCPY((void *) &tms[1], tm_ptr, sizeof(struct tm));
#else
#error internal error
#endif
DUK_DDD(DUK_DDDPRINT("gmtime result: tm={sec:%ld,min:%ld,hour:%ld,mday:%ld,mon:%ld,year:%ld,"
"wday:%ld,yday:%ld,isdst:%ld}",
(long) tms[0].tm_sec, (long) tms[0].tm_min, (long) tms[0].tm_hour,
(long) tms[0].tm_mday, (long) tms[0].tm_mon, (long) tms[0].tm_year,
(long) tms[0].tm_wday, (long) tms[0].tm_yday, (long) tms[0].tm_isdst));
DUK_DDD(DUK_DDDPRINT("localtime result: tm={sec:%ld,min:%ld,hour:%ld,mday:%ld,mon:%ld,year:%ld,"
"wday:%ld,yday:%ld,isdst:%ld}",
(long) tms[1].tm_sec, (long) tms[1].tm_min, (long) tms[1].tm_hour,
(long) tms[1].tm_mday, (long) tms[1].tm_mon, (long) tms[1].tm_year,
(long) tms[1].tm_wday, (long) tms[1].tm_yday, (long) tms[1].tm_isdst));
/* tm_isdst is both an input and an output to mktime(), use 0 to
* avoid DST handling in mktime():
* - https://github.com/svaarala/duktape/issues/406
* - http://stackoverflow.com/questions/8558919/mktime-and-tm-isdst
*/
tms[0].tm_isdst = 0;
tms[1].tm_isdst = 0;
t1 = mktime(&tms[0]); /* UTC */
t2 = mktime(&tms[1]); /* local */
if (t1 == (time_t) -1 || t2 == (time_t) -1) {
/* This check used to be for (t < 0) but on some platforms
* time_t is unsigned and apparently the proper way to detect
* an mktime() error return is the cast above. See e.g.:
* http://pubs.opengroup.org/onlinepubs/009695299/functions/mktime.html
*/
goto error;
}
DUK_DDD(DUK_DDDPRINT("t1=%ld (utc), t2=%ld (local)", (long) t1, (long) t2));
/* Compute final offset in seconds, positive if local time ahead of
* UTC (returned value is UTC-to-local offset).
*
* difftime() returns a double, so coercion to int generates quite
* a lot of code. Direct subtraction is not portable, however.
* XXX: allow direct subtraction on known platforms.
*/
#if 0
return (duk_int_t) (t2 - t1);
#endif
return (duk_int_t) difftime(t2, t1);
error:
/* XXX: return something more useful, so that caller can throw? */
DUK_D(DUK_DPRINT("mktime() failed, d=%lf", (double) d));
return 0;
}
#endif /* DUK_USE_DATE_TZO_GMTIME */
#if defined(DUK_USE_DATE_PRS_STRPTIME)
DUK_INTERNAL duk_bool_t duk_bi_date_parse_string_strptime(duk_context *ctx, const char *str) {
struct tm tm;
time_t t;
char buf[DUK__STRPTIME_BUF_SIZE];
/* copy to buffer with spare to avoid Valgrind gripes from strptime */
DUK_ASSERT(str != NULL);
DUK_MEMZERO(buf, sizeof(buf)); /* valgrind whine without this */
DUK_SNPRINTF(buf, sizeof(buf), "%s", (const char *) str);
buf[sizeof(buf) - 1] = (char) 0;
DUK_DDD(DUK_DDDPRINT("parsing: '%s'", (const char *) buf));
DUK_MEMZERO(&tm, sizeof(tm));
if (strptime((const char *) buf, "%c", &tm) != NULL) {
DUK_DDD(DUK_DDDPRINT("before mktime: tm={sec:%ld,min:%ld,hour:%ld,mday:%ld,mon:%ld,year:%ld,"
"wday:%ld,yday:%ld,isdst:%ld}",
(long) tm.tm_sec, (long) tm.tm_min, (long) tm.tm_hour,
(long) tm.tm_mday, (long) tm.tm_mon, (long) tm.tm_year,
(long) tm.tm_wday, (long) tm.tm_yday, (long) tm.tm_isdst));
tm.tm_isdst = -1; /* negative: dst info not available */
t = mktime(&tm);
DUK_DDD(DUK_DDDPRINT("mktime() -> %ld", (long) t));
if (t >= 0) {
duk_push_number(ctx, ((duk_double_t) t) * 1000.0);
return 1;
}
}
return 0;
}
#endif /* DUK_USE_DATE_PRS_STRPTIME */
#if defined(DUK_USE_DATE_PRS_GETDATE)
DUK_INTERNAL duk_bool_t duk_bi_date_parse_string_getdate(duk_context *ctx, const char *str) {
struct tm tm;
duk_small_int_t rc;
time_t t;
/* For this to work, DATEMSK must be set, so this is not very
* convenient for an embeddable interpreter.
*/
DUK_MEMZERO(&tm, sizeof(struct tm));
rc = (duk_small_int_t) getdate_r(str, &tm);
DUK_DDD(DUK_DDDPRINT("getdate_r() -> %ld", (long) rc));
if (rc == 0) {
t = mktime(&tm);
DUK_DDD(DUK_DDDPRINT("mktime() -> %ld", (long) t));
if (t >= 0) {
duk_push_number(ctx, (duk_double_t) t);
return 1;
}
}
return 0;
}
#endif /* DUK_USE_DATE_PRS_GETDATE */
#if defined(DUK_USE_DATE_FMT_STRFTIME)
DUK_INTERNAL duk_bool_t duk_bi_date_format_parts_strftime(duk_context *ctx, duk_int_t *parts, duk_int_t tzoffset, duk_small_uint_t flags) {
char buf[DUK__STRFTIME_BUF_SIZE];
struct tm tm;
const char *fmt;
DUK_UNREF(tzoffset);
/* If the platform doesn't support the entire Ecmascript range, we need
* to return 0 so that the caller can fall back to the default formatter.
*
* For now, assume that if time_t is 8 bytes or more, the whole Ecmascript
* range is supported. For smaller time_t values (4 bytes in practice),
* assumes that the signed 32-bit range is supported.
*
* XXX: detect this more correctly per platform. The size of time_t is
* probably not an accurate guarantee of strftime() supporting or not
* supporting a large time range (the full Ecmascript range).
*/
if (sizeof(time_t) < 8 &&
(parts[DUK_DATE_IDX_YEAR] < 1970 || parts[DUK_DATE_IDX_YEAR] > 2037)) {
/* be paranoid for 32-bit time values (even avoiding negative ones) */
return 0;
}
DUK_MEMZERO(&tm, sizeof(tm));
tm.tm_sec = parts[DUK_DATE_IDX_SECOND];
tm.tm_min = parts[DUK_DATE_IDX_MINUTE];
tm.tm_hour = parts[DUK_DATE_IDX_HOUR];
tm.tm_mday = parts[DUK_DATE_IDX_DAY]; /* already one-based */
tm.tm_mon = parts[DUK_DATE_IDX_MONTH] - 1; /* one-based -> zero-based */
tm.tm_year = parts[DUK_DATE_IDX_YEAR] - 1900;
tm.tm_wday = parts[DUK_DATE_IDX_WEEKDAY];
tm.tm_isdst = 0;
DUK_MEMZERO(buf, sizeof(buf));
if ((flags & DUK_DATE_FLAG_TOSTRING_DATE) && (flags & DUK_DATE_FLAG_TOSTRING_TIME)) {
fmt = "%c";
} else if (flags & DUK_DATE_FLAG_TOSTRING_DATE) {
fmt = "%x";
} else {
DUK_ASSERT(flags & DUK_DATE_FLAG_TOSTRING_TIME);
fmt = "%X";
}
(void) strftime(buf, sizeof(buf) - 1, fmt, &tm);
DUK_ASSERT(buf[sizeof(buf) - 1] == 0);
duk_push_string(ctx, buf);
return 1;
}
#endif /* DUK_USE_DATE_FMT_STRFTIME */
#undef DUK__STRPTIME_BUF_SIZE
#undef DUK__STRFTIME_BUF_SIZE
#line 1 "duk_bi_date_windows.c"
/*
* Windows Date providers
*
* Platform specific links:
*
* - http://msdn.microsoft.com/en-us/library/windows/desktop/ms725473(v=vs.85).aspx
*/
/* include removed: duk_internal.h */
/* The necessary #includes are in place in duk_config.h. */
#if defined(DUK_USE_DATE_NOW_WINDOWS) || defined(DUK_USE_DATE_TZO_WINDOWS)
/* Shared Windows helpers. */
DUK_LOCAL void duk__convert_systime_to_ularge(const SYSTEMTIME *st, ULARGE_INTEGER *res) {
FILETIME ft;
if (SystemTimeToFileTime(st, &ft) == 0) {
DUK_D(DUK_DPRINT("SystemTimeToFileTime() failed, returning 0"));
res->QuadPart = 0;
} else {
res->LowPart = ft.dwLowDateTime;
res->HighPart = ft.dwHighDateTime;
}
}
DUK_LOCAL void duk__set_systime_jan1970(SYSTEMTIME *st) {
DUK_MEMZERO((void *) st, sizeof(*st));
st->wYear = 1970;
st->wMonth = 1;
st->wDayOfWeek = 4; /* not sure whether or not needed; Thursday */
st->wDay = 1;
DUK_ASSERT(st->wHour == 0);
DUK_ASSERT(st->wMinute == 0);
DUK_ASSERT(st->wSecond == 0);
DUK_ASSERT(st->wMilliseconds == 0);
}
#endif /* defined(DUK_USE_DATE_NOW_WINDOWS) || defined(DUK_USE_DATE_TZO_WINDOWS) */
#ifdef DUK_USE_DATE_NOW_WINDOWS
DUK_INTERNAL duk_double_t duk_bi_date_get_now_windows(duk_context *ctx) {
/* Suggested step-by-step method from documentation of RtlTimeToSecondsSince1970:
* http://msdn.microsoft.com/en-us/library/windows/desktop/ms724928(v=vs.85).aspx
*/
SYSTEMTIME st1, st2;
ULARGE_INTEGER tmp1, tmp2;
DUK_UNREF(ctx);
GetSystemTime(&st1);
duk__convert_systime_to_ularge((const SYSTEMTIME *) &st1, &tmp1);
duk__set_systime_jan1970(&st2);
duk__convert_systime_to_ularge((const SYSTEMTIME *) &st2, &tmp2);
/* Difference is in 100ns units, convert to milliseconds w/o fractions */
return (duk_double_t) ((tmp1.QuadPart - tmp2.QuadPart) / 10000LL);
}
#endif /* DUK_USE_DATE_NOW_WINDOWS */
#if defined(DUK_USE_DATE_TZO_WINDOWS)
DUK_INTERNAL_DECL duk_int_t duk_bi_date_get_local_tzoffset_windows(duk_double_t d) {
SYSTEMTIME st1;
SYSTEMTIME st2;
SYSTEMTIME st3;
ULARGE_INTEGER tmp1;
ULARGE_INTEGER tmp2;
ULARGE_INTEGER tmp3;
FILETIME ft1;
/* XXX: handling of timestamps outside Windows supported range.
* How does Windows deal with dates before 1600? Does windows
* support all Ecmascript years (like -200000 and +200000)?
* Should equivalent year mapping be used here too? If so, use
* a shared helper (currently integrated into timeval-to-parts).
*/
/* Use the approach described in "Remarks" of FileTimeToLocalFileTime:
* http://msdn.microsoft.com/en-us/library/windows/desktop/ms724277(v=vs.85).aspx
*/
duk__set_systime_jan1970(&st1);
duk__convert_systime_to_ularge((const SYSTEMTIME *) &st1, &tmp1);
tmp2.QuadPart = (ULONGLONG) (d * 10000.0); /* millisec -> 100ns units since jan 1, 1970 */
tmp2.QuadPart += tmp1.QuadPart; /* input 'd' in Windows UTC, 100ns units */
ft1.dwLowDateTime = tmp2.LowPart;
ft1.dwHighDateTime = tmp2.HighPart;
FileTimeToSystemTime((const FILETIME *) &ft1, &st2);
if (SystemTimeToTzSpecificLocalTime((LPTIME_ZONE_INFORMATION) NULL, &st2, &st3) == 0) {
DUK_D(DUK_DPRINT("SystemTimeToTzSpecificLocalTime() failed, return tzoffset 0"));
return 0;
}
duk__convert_systime_to_ularge((const SYSTEMTIME *) &st3, &tmp3);
/* Positive if local time ahead of UTC. */
return (duk_int_t) (((LONGLONG) tmp3.QuadPart - (LONGLONG) tmp2.QuadPart) / 10000000LL); /* seconds */
}
#endif /* DUK_USE_DATE_TZO_WINDOWS */
#line 1 "duk_bi_duktape.c"
/*
* Duktape built-ins
*
* Size optimization note: it might seem that vararg multipurpose functions
* like fin(), enc(), and dec() are not very size optimal, but using a single
* user-visible Ecmascript function saves a lot of run-time footprint; each
* Function instance takes >100 bytes. Using a shared native helper and a
* 'magic' value won't save much if there are multiple Function instances
* anyway.
*/
/* include removed: duk_internal.h */
/* Raw helper to extract internal information / statistics about a value.
* The return values are version specific and must not expose anything
* that would lead to security issues (e.g. exposing compiled function
* 'data' buffer might be an issue). Currently only counts and sizes and
* such are given so there should not be a security impact.
*/
DUK_INTERNAL duk_ret_t duk_bi_duktape_object_info(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv;
duk_heaphdr *h;
duk_int_t i, n;
DUK_UNREF(thr);
/* result array */
duk_push_array(ctx); /* -> [ val arr ] */
/* type tag (public) */
duk_push_int(ctx, duk_get_type(ctx, 0));
/* address */
tv = duk_get_tval(ctx, 0);
DUK_ASSERT(tv != NULL); /* because arg count is 1 */
if (DUK_TVAL_IS_HEAP_ALLOCATED(tv)) {
h = DUK_TVAL_GET_HEAPHDR(tv);
duk_push_pointer(ctx, (void *) h);
} else {
/* internal type tag */
duk_push_int(ctx, (duk_int_t) DUK_TVAL_GET_TAG(tv));
goto done;
}
DUK_ASSERT(h != NULL);
/* refcount */
#ifdef DUK_USE_REFERENCE_COUNTING
duk_push_size_t(ctx, DUK_HEAPHDR_GET_REFCOUNT(h));
#else
duk_push_undefined(ctx);
#endif
/* heaphdr size and additional allocation size, followed by
* type specific stuff (with varying value count)
*/
switch ((duk_small_int_t) DUK_HEAPHDR_GET_TYPE(h)) {
case DUK_HTYPE_STRING: {
duk_hstring *h_str = (duk_hstring *) h;
duk_push_uint(ctx, (duk_uint_t) (sizeof(duk_hstring) + DUK_HSTRING_GET_BYTELEN(h_str) + 1));
break;
}
case DUK_HTYPE_OBJECT: {
duk_hobject *h_obj = (duk_hobject *) h;
duk_small_uint_t hdr_size;
if (DUK_HOBJECT_IS_COMPILEDFUNCTION(h_obj)) {
hdr_size = (duk_small_uint_t) sizeof(duk_hcompiledfunction);
} else if (DUK_HOBJECT_IS_NATIVEFUNCTION(h_obj)) {
hdr_size = (duk_small_uint_t) sizeof(duk_hnativefunction);
} else if (DUK_HOBJECT_IS_THREAD(h_obj)) {
hdr_size = (duk_small_uint_t) sizeof(duk_hthread);
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
} else if (DUK_HOBJECT_IS_BUFFEROBJECT(h_obj)) {
hdr_size = (duk_small_uint_t) sizeof(duk_hbufferobject);
#endif
} else {
hdr_size = (duk_small_uint_t) sizeof(duk_hobject);
}
duk_push_uint(ctx, (duk_uint_t) hdr_size);
duk_push_uint(ctx, (duk_uint_t) DUK_HOBJECT_P_ALLOC_SIZE(h_obj));
duk_push_uint(ctx, (duk_uint_t) DUK_HOBJECT_GET_ESIZE(h_obj));
/* Note: e_next indicates the number of gc-reachable entries
* in the entry part, and also indicates the index where the
* next new property would be inserted. It does *not* indicate
* the number of non-NULL keys present in the object. That
* value could be counted separately but requires a pass through
* the key list.
*/
duk_push_uint(ctx, (duk_uint_t) DUK_HOBJECT_GET_ENEXT(h_obj));
duk_push_uint(ctx, (duk_uint_t) DUK_HOBJECT_GET_ASIZE(h_obj));
duk_push_uint(ctx, (duk_uint_t) DUK_HOBJECT_GET_HSIZE(h_obj));
if (DUK_HOBJECT_IS_COMPILEDFUNCTION(h_obj)) {
duk_hbuffer *h_data = (duk_hbuffer *) DUK_HCOMPILEDFUNCTION_GET_DATA(thr->heap, (duk_hcompiledfunction *) h_obj);
if (h_data) {
duk_push_uint(ctx, (duk_uint_t) DUK_HBUFFER_GET_SIZE(h_data));
} else {
duk_push_uint(ctx, 0);
}
}
break;
}
case DUK_HTYPE_BUFFER: {
duk_hbuffer *h_buf = (duk_hbuffer *) h;
if (DUK_HBUFFER_HAS_DYNAMIC(h_buf)) {
if (DUK_HBUFFER_HAS_EXTERNAL(h_buf)) {
duk_push_uint(ctx, (duk_uint_t) (sizeof(duk_hbuffer_external)));
} else {
/* When alloc_size == 0 the second allocation may not
* actually exist.
*/
duk_push_uint(ctx, (duk_uint_t) (sizeof(duk_hbuffer_dynamic)));
}
duk_push_uint(ctx, (duk_uint_t) (DUK_HBUFFER_GET_SIZE(h_buf)));
} else {
duk_push_uint(ctx, (duk_uint_t) (sizeof(duk_hbuffer_fixed) + DUK_HBUFFER_GET_SIZE(h_buf) + 1));
}
break;
}
}
done:
/* set values into ret array */
/* XXX: primitive to make array from valstack slice */
n = duk_get_top(ctx);
for (i = 2; i < n; i++) {
duk_dup(ctx, i);
duk_put_prop_index(ctx, 1, i - 2);
}
duk_dup(ctx, 1);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_duktape_object_act(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_activation *act;
duk_uint_fast32_t pc;
duk_uint_fast32_t line;
duk_int_t level;
/* -1 = top callstack entry, callstack[callstack_top - 1]
* -callstack_top = bottom callstack entry, callstack[0]
*/
level = duk_to_int(ctx, 0);
if (level >= 0 || -level > (duk_int_t) thr->callstack_top) {
return 0;
}
DUK_ASSERT(level >= -((duk_int_t) thr->callstack_top) && level <= -1);
act = thr->callstack + thr->callstack_top + level;
duk_push_object(ctx);
duk_push_tval(ctx, &act->tv_func);
/* Relevant PC is just before current one because PC is
* post-incremented. This should match what error augment
* code does.
*/
pc = duk_hthread_get_act_prev_pc(thr, act);
duk_push_uint(ctx, (duk_uint_t) pc);
#if defined(DUK_USE_PC2LINE)
line = duk_hobject_pc2line_query(ctx, -2, pc);
#else
line = 0;
#endif
duk_push_uint(ctx, (duk_uint_t) line);
/* Providing access to e.g. act->lex_env would be dangerous: these
* internal structures must never be accessible to the application.
* Duktape relies on them having consistent data, and this consistency
* is only asserted for, not checked for.
*/
/* [ level obj func pc line ] */
/* XXX: version specific array format instead? */
duk_xdef_prop_stridx_wec(ctx, -4, DUK_STRIDX_LINE_NUMBER);
duk_xdef_prop_stridx_wec(ctx, -3, DUK_STRIDX_PC);
duk_xdef_prop_stridx_wec(ctx, -2, DUK_STRIDX_LC_FUNCTION);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_duktape_object_gc(duk_context *ctx) {
#ifdef DUK_USE_MARK_AND_SWEEP
duk_hthread *thr = (duk_hthread *) ctx;
duk_small_uint_t flags;
duk_bool_t rc;
flags = (duk_small_uint_t) duk_get_uint(ctx, 0);
rc = duk_heap_mark_and_sweep(thr->heap, flags);
/* XXX: Not sure what the best return value would be in the API.
* Return a boolean for now. Note that rc == 0 is success (true).
*/
duk_push_boolean(ctx, !rc);
return 1;
#else
DUK_UNREF(ctx);
return 0;
#endif
}
DUK_INTERNAL duk_ret_t duk_bi_duktape_object_fin(duk_context *ctx) {
(void) duk_require_hobject(ctx, 0);
if (duk_get_top(ctx) >= 2) {
/* Set: currently a finalizer is disabled by setting it to
* undefined; this does not remove the property at the moment.
* The value could be type checked to be either a function
* or something else; if something else, the property could
* be deleted.
*/
duk_set_top(ctx, 2);
(void) duk_put_prop_stridx(ctx, 0, DUK_STRIDX_INT_FINALIZER);
return 0;
} else {
/* Get. */
DUK_ASSERT(duk_get_top(ctx) == 1);
duk_get_prop_stridx(ctx, 0, DUK_STRIDX_INT_FINALIZER);
return 1;
}
}
DUK_INTERNAL duk_ret_t duk_bi_duktape_object_enc(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hstring *h_str;
DUK_UNREF(thr);
/* Vararg function: must be careful to check/require arguments.
* The JSON helpers accept invalid indices and treat them like
* non-existent optional parameters.
*/
h_str = duk_require_hstring(ctx, 0);
duk_require_valid_index(ctx, 1);
if (h_str == DUK_HTHREAD_STRING_HEX(thr)) {
duk_set_top(ctx, 2);
duk_hex_encode(ctx, 1);
DUK_ASSERT_TOP(ctx, 2);
} else if (h_str == DUK_HTHREAD_STRING_BASE64(thr)) {
duk_set_top(ctx, 2);
duk_base64_encode(ctx, 1);
DUK_ASSERT_TOP(ctx, 2);
#ifdef DUK_USE_JX
} else if (h_str == DUK_HTHREAD_STRING_JX(thr)) {
duk_bi_json_stringify_helper(ctx,
1 /*idx_value*/,
2 /*idx_replacer*/,
3 /*idx_space*/,
DUK_JSON_FLAG_EXT_CUSTOM |
DUK_JSON_FLAG_ASCII_ONLY |
DUK_JSON_FLAG_AVOID_KEY_QUOTES /*flags*/);
#endif
#ifdef DUK_USE_JC
} else if (h_str == DUK_HTHREAD_STRING_JC(thr)) {
duk_bi_json_stringify_helper(ctx,
1 /*idx_value*/,
2 /*idx_replacer*/,
3 /*idx_space*/,
DUK_JSON_FLAG_EXT_COMPATIBLE |
DUK_JSON_FLAG_ASCII_ONLY /*flags*/);
#endif
} else {
return DUK_RET_TYPE_ERROR;
}
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_duktape_object_dec(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hstring *h_str;
DUK_UNREF(thr);
/* Vararg function: must be careful to check/require arguments.
* The JSON helpers accept invalid indices and treat them like
* non-existent optional parameters.
*/
h_str = duk_require_hstring(ctx, 0);
duk_require_valid_index(ctx, 1);
if (h_str == DUK_HTHREAD_STRING_HEX(thr)) {
duk_set_top(ctx, 2);
duk_hex_decode(ctx, 1);
DUK_ASSERT_TOP(ctx, 2);
} else if (h_str == DUK_HTHREAD_STRING_BASE64(thr)) {
duk_set_top(ctx, 2);
duk_base64_decode(ctx, 1);
DUK_ASSERT_TOP(ctx, 2);
#ifdef DUK_USE_JX
} else if (h_str == DUK_HTHREAD_STRING_JX(thr)) {
duk_bi_json_parse_helper(ctx,
1 /*idx_value*/,
2 /*idx_replacer*/,
DUK_JSON_FLAG_EXT_CUSTOM /*flags*/);
#endif
#ifdef DUK_USE_JC
} else if (h_str == DUK_HTHREAD_STRING_JC(thr)) {
duk_bi_json_parse_helper(ctx,
1 /*idx_value*/,
2 /*idx_replacer*/,
DUK_JSON_FLAG_EXT_COMPATIBLE /*flags*/);
#endif
} else {
return DUK_RET_TYPE_ERROR;
}
return 1;
}
/*
* Compact an object
*/
DUK_INTERNAL duk_ret_t duk_bi_duktape_object_compact(duk_context *ctx) {
DUK_ASSERT_TOP(ctx, 1);
duk_compact(ctx, 0);
return 1; /* return the argument object */
}
#line 1 "duk_bi_error.c"
/*
* Error built-ins
*/
/* include removed: duk_internal.h */
DUK_INTERNAL duk_ret_t duk_bi_error_constructor_shared(duk_context *ctx) {
/* Behavior for constructor and non-constructor call is
* the same except for augmenting the created error. When
* called as a constructor, the caller (duk_new()) will handle
* augmentation; when called as normal function, we need to do
* it here.
*/
duk_hthread *thr = (duk_hthread *) ctx;
duk_small_int_t bidx_prototype = duk_get_current_magic(ctx);
/* same for both error and each subclass like TypeError */
duk_uint_t flags_and_class = DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_ERROR);
DUK_UNREF(thr);
duk_push_object_helper(ctx, flags_and_class, bidx_prototype);
/* If message is undefined, the own property 'message' is not set at
* all to save property space. An empty message is inherited anyway.
*/
if (!duk_is_undefined(ctx, 0)) {
duk_to_string(ctx, 0);
duk_dup(ctx, 0); /* [ message error message ] */
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_MESSAGE, DUK_PROPDESC_FLAGS_WC);
}
/* Augment the error if called as a normal function. __FILE__ and __LINE__
* are not desirable in this case.
*/
#ifdef DUK_USE_AUGMENT_ERROR_CREATE
if (!duk_is_constructor_call(ctx)) {
duk_err_augment_error_create(thr, thr, NULL, 0, 1 /*noblame_fileline*/);
}
#endif
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_error_prototype_to_string(duk_context *ctx) {
/* XXX: optimize with more direct internal access */
duk_push_this(ctx);
(void) duk_require_hobject_or_lfunc_coerce(ctx, -1);
/* [ ... this ] */
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_NAME);
if (duk_is_undefined(ctx, -1)) {
duk_pop(ctx);
duk_push_string(ctx, "Error");
} else {
duk_to_string(ctx, -1);
}
/* [ ... this name ] */
/* XXX: Are steps 6 and 7 in E5 Section 15.11.4.4 duplicated by
* accident or are they actually needed? The first ToString()
* could conceivably return 'undefined'.
*/
duk_get_prop_stridx(ctx, -2, DUK_STRIDX_MESSAGE);
if (duk_is_undefined(ctx, -1)) {
duk_pop(ctx);
duk_push_string(ctx, "");
} else {
duk_to_string(ctx, -1);
}
/* [ ... this name message ] */
if (duk_get_length(ctx, -2) == 0) {
/* name is empty -> return message */
return 1;
}
if (duk_get_length(ctx, -1) == 0) {
/* message is empty -> return name */
duk_pop(ctx);
return 1;
}
duk_push_string(ctx, ": ");
duk_insert(ctx, -2); /* ... name ': ' message */
duk_concat(ctx, 3);
return 1;
}
#if defined(DUK_USE_TRACEBACKS)
/*
* Traceback handling
*
* The unified helper decodes the traceback and produces various requested
* outputs. It should be optimized for size, and may leave garbage on stack,
* only the topmost return value matters. For instance, traceback separator
* and decoded strings are pushed even when looking for filename only.
*
* NOTE: although _Tracedata is an internal property, user code can currently
* write to the array (or replace it with something other than an array).
* The code below must tolerate arbitrary _Tracedata. It can throw errors
* etc, but cannot cause a segfault or memory unsafe behavior.
*/
/* constants arbitrary, chosen for small loads */
#define DUK__OUTPUT_TYPE_TRACEBACK (-1)
#define DUK__OUTPUT_TYPE_FILENAME 0
#define DUK__OUTPUT_TYPE_LINENUMBER 1
DUK_LOCAL duk_ret_t duk__error_getter_helper(duk_context *ctx, duk_small_int_t output_type) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_idx_t idx_td;
duk_small_int_t i; /* traceback depth fits into 16 bits */
duk_small_int_t t; /* stack type fits into 16 bits */
duk_small_int_t count_func = 0; /* traceback depth ensures fits into 16 bits */
const char *str_tailcall = " tailcall";
const char *str_strict = " strict";
const char *str_construct = " construct";
const char *str_prevyield = " preventsyield";
const char *str_directeval = " directeval";
const char *str_empty = "";
DUK_ASSERT_TOP(ctx, 0); /* fixed arg count */
DUK_UNREF(thr);
duk_push_this(ctx);
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_TRACEDATA);
idx_td = duk_get_top_index(ctx);
duk_push_hstring_stridx(ctx, DUK_STRIDX_NEWLINE_4SPACE);
duk_push_this(ctx);
/* [ ... this tracedata sep this ] */
/* XXX: skip null filename? */
if (duk_check_type(ctx, idx_td, DUK_TYPE_OBJECT)) {
/* Current tracedata contains 2 entries per callstack entry. */
for (i = 0; ; i += 2) {
duk_int_t pc;
duk_int_t line;
duk_int_t flags;
duk_double_t d;
const char *funcname;
const char *filename;
duk_hobject *h_func;
duk_hstring *h_name;
duk_require_stack(ctx, 5);
duk_get_prop_index(ctx, idx_td, i);
duk_get_prop_index(ctx, idx_td, i + 1);
d = duk_to_number(ctx, -1);
pc = (duk_int_t) DUK_FMOD(d, DUK_DOUBLE_2TO32);
flags = (duk_int_t) DUK_FLOOR(d / DUK_DOUBLE_2TO32);
t = (duk_small_int_t) duk_get_type(ctx, -2);
if (t == DUK_TYPE_OBJECT || t == DUK_TYPE_LIGHTFUNC) {
/*
* Ecmascript/native function call or lightfunc call
*/
count_func++;
/* [ ... v1(func) v2(pc+flags) ] */
h_func = duk_get_hobject(ctx, -2); /* NULL for lightfunc */
duk_get_prop_stridx(ctx, -2, DUK_STRIDX_NAME);
duk_get_prop_stridx(ctx, -3, DUK_STRIDX_FILE_NAME);
#if defined(DUK_USE_PC2LINE)
line = duk_hobject_pc2line_query(ctx, -4, (duk_uint_fast32_t) pc);
#else
line = 0;
#endif
/* [ ... v1 v2 name filename ] */
/* When looking for .fileName/.lineNumber, blame first
* function which has a .fileName.
*/
if (duk_is_string(ctx, -1)) {
if (output_type == DUK__OUTPUT_TYPE_FILENAME) {
return 1;
} else if (output_type == DUK__OUTPUT_TYPE_LINENUMBER) {
duk_push_int(ctx, line);
return 1;
}
}
/* XXX: Change 'anon' handling here too, to use empty string for anonymous functions? */
/* XXX: Could be improved by coercing to a readable duk_tval (especially string escaping) */
h_name = duk_get_hstring(ctx, -2); /* may be NULL */
funcname = (h_name == NULL || h_name == DUK_HTHREAD_STRING_EMPTY_STRING(thr)) ?
"[anon]" : (const char *) DUK_HSTRING_GET_DATA(h_name);
filename = duk_get_string(ctx, -1);
filename = filename ? filename : "";
DUK_ASSERT(funcname != NULL);
DUK_ASSERT(filename != NULL);
if (h_func == NULL) {
duk_push_sprintf(ctx, "at %s light%s%s%s%s%s",
(const char *) funcname,
(const char *) ((flags & DUK_ACT_FLAG_STRICT) ? str_strict : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_TAILCALLED) ? str_tailcall : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_CONSTRUCT) ? str_construct : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_DIRECT_EVAL) ? str_directeval : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_PREVENT_YIELD) ? str_prevyield : str_empty));
} else if (DUK_HOBJECT_HAS_NATIVEFUNCTION(h_func)) {
duk_push_sprintf(ctx, "at %s (%s) native%s%s%s%s%s",
(const char *) funcname,
(const char *) filename,
(const char *) ((flags & DUK_ACT_FLAG_STRICT) ? str_strict : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_TAILCALLED) ? str_tailcall : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_CONSTRUCT) ? str_construct : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_DIRECT_EVAL) ? str_directeval : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_PREVENT_YIELD) ? str_prevyield : str_empty));
} else {
duk_push_sprintf(ctx, "at %s (%s:%ld)%s%s%s%s%s",
(const char *) funcname,
(const char *) filename,
(long) line,
(const char *) ((flags & DUK_ACT_FLAG_STRICT) ? str_strict : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_TAILCALLED) ? str_tailcall : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_CONSTRUCT) ? str_construct : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_DIRECT_EVAL) ? str_directeval : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_PREVENT_YIELD) ? str_prevyield : str_empty));
}
duk_replace(ctx, -5); /* [ ... v1 v2 name filename str ] -> [ ... str v2 name filename ] */
duk_pop_n(ctx, 3); /* -> [ ... str ] */
} else if (t == DUK_TYPE_STRING) {
/*
* __FILE__ / __LINE__ entry, here 'pc' is line number directly.
* Sometimes __FILE__ / __LINE__ is reported as the source for
* the error (fileName, lineNumber), sometimes not.
*/
/* [ ... v1(filename) v2(line+flags) ] */
/* When looking for .fileName/.lineNumber, blame compilation
* or C call site unless flagged not to do so.
*/
if (!(flags & DUK_TB_FLAG_NOBLAME_FILELINE)) {
if (output_type == DUK__OUTPUT_TYPE_FILENAME) {
duk_pop(ctx);
return 1;
} else if (output_type == DUK__OUTPUT_TYPE_LINENUMBER) {
duk_push_int(ctx, pc);
return 1;
}
}
duk_push_sprintf(ctx, "at [anon] (%s:%ld) internal",
(const char *) duk_get_string(ctx, -2), (long) pc);
duk_replace(ctx, -3); /* [ ... v1 v2 str ] -> [ ... str v2 ] */
duk_pop(ctx); /* -> [ ... str ] */
} else {
/* unknown, ignore */
duk_pop_2(ctx);
break;
}
}
if (count_func >= DUK_USE_TRACEBACK_DEPTH) {
/* Possibly truncated; there is no explicit truncation
* marker so this is the best we can do.
*/
duk_push_hstring_stridx(ctx, DUK_STRIDX_BRACKETED_ELLIPSIS);
}
}
/* [ ... this tracedata sep this str1 ... strN ] */
if (output_type != DUK__OUTPUT_TYPE_TRACEBACK) {
return 0;
} else {
/* The 'this' after 'sep' will get ToString() coerced by
* duk_join() automatically. We don't want to do that
* coercion when providing .fileName or .lineNumber (GH-254).
*/
duk_join(ctx, duk_get_top(ctx) - (idx_td + 2) /*count, not including sep*/);
return 1;
}
}
/* XXX: Output type could be encoded into native function 'magic' value to
* save space. For setters the stridx could be encoded into 'magic'.
*/
DUK_INTERNAL duk_ret_t duk_bi_error_prototype_stack_getter(duk_context *ctx) {
return duk__error_getter_helper(ctx, DUK__OUTPUT_TYPE_TRACEBACK);
}
DUK_INTERNAL duk_ret_t duk_bi_error_prototype_filename_getter(duk_context *ctx) {
return duk__error_getter_helper(ctx, DUK__OUTPUT_TYPE_FILENAME);
}
DUK_INTERNAL duk_ret_t duk_bi_error_prototype_linenumber_getter(duk_context *ctx) {
return duk__error_getter_helper(ctx, DUK__OUTPUT_TYPE_LINENUMBER);
}
#undef DUK__OUTPUT_TYPE_TRACEBACK
#undef DUK__OUTPUT_TYPE_FILENAME
#undef DUK__OUTPUT_TYPE_LINENUMBER
#else /* DUK_USE_TRACEBACKS */
/*
* Traceback handling when tracebacks disabled.
*
* The fileName / lineNumber stubs are now necessary because built-in
* data will include the accessor properties in Error.prototype. If those
* are removed for builds without tracebacks, these can also be removed.
* 'stack' should still be present and produce a ToString() equivalent:
* this is useful for user code which prints a stacktrace and expects to
* see something useful. A normal stacktrace also begins with a ToString()
* of the error so this makes sense.
*/
DUK_INTERNAL duk_ret_t duk_bi_error_prototype_stack_getter(duk_context *ctx) {
/* XXX: remove this native function and map 'stack' accessor
* to the toString() implementation directly.
*/
return duk_bi_error_prototype_to_string(ctx);
}
DUK_INTERNAL duk_ret_t duk_bi_error_prototype_filename_getter(duk_context *ctx) {
DUK_UNREF(ctx);
return 0;
}
DUK_INTERNAL duk_ret_t duk_bi_error_prototype_linenumber_getter(duk_context *ctx) {
DUK_UNREF(ctx);
return 0;
}
#endif /* DUK_USE_TRACEBACKS */
DUK_LOCAL duk_ret_t duk__error_setter_helper(duk_context *ctx, duk_small_uint_t stridx_key) {
/* Attempt to write 'stack', 'fileName', 'lineNumber' works as if
* user code called Object.defineProperty() to create an overriding
* own property. This allows user code to overwrite .fileName etc
* intuitively as e.g. "err.fileName = 'dummy'" as one might expect.
* See https://github.com/svaarala/duktape/issues/387.
*/
DUK_ASSERT_TOP(ctx, 1); /* fixed arg count: value */
duk_push_this(ctx);
duk_push_hstring_stridx(ctx, (duk_small_int_t) stridx_key);
duk_dup(ctx, 0);
/* [ ... obj key value ] */
DUK_DD(DUK_DDPRINT("error setter: %!T %!T %!T",
duk_get_tval(ctx, -3), duk_get_tval(ctx, -2), duk_get_tval(ctx, -1)));
duk_def_prop(ctx, -3, DUK_DEFPROP_HAVE_VALUE |
DUK_DEFPROP_HAVE_WRITABLE | DUK_DEFPROP_WRITABLE |
DUK_DEFPROP_HAVE_ENUMERABLE | /*not enumerable*/
DUK_DEFPROP_HAVE_CONFIGURABLE | DUK_DEFPROP_CONFIGURABLE);
return 0;
}
DUK_INTERNAL duk_ret_t duk_bi_error_prototype_stack_setter(duk_context *ctx) {
return duk__error_setter_helper(ctx, DUK_STRIDX_STACK);
}
DUK_INTERNAL duk_ret_t duk_bi_error_prototype_filename_setter(duk_context *ctx) {
return duk__error_setter_helper(ctx, DUK_STRIDX_FILE_NAME);
}
DUK_INTERNAL duk_ret_t duk_bi_error_prototype_linenumber_setter(duk_context *ctx) {
return duk__error_setter_helper(ctx, DUK_STRIDX_LINE_NUMBER);
}
#line 1 "duk_bi_function.c"
/*
* Function built-ins
*/
/* include removed: duk_internal.h */
DUK_INTERNAL duk_ret_t duk_bi_function_constructor(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hstring *h_sourcecode;
duk_idx_t nargs;
duk_idx_t i;
duk_small_uint_t comp_flags;
duk_hcompiledfunction *func;
duk_hobject *outer_lex_env;
duk_hobject *outer_var_env;
/* normal and constructor calls have identical semantics */
nargs = duk_get_top(ctx);
for (i = 0; i < nargs; i++) {
duk_to_string(ctx, i);
}
if (nargs == 0) {
duk_push_string(ctx, "");
duk_push_string(ctx, "");
} else if (nargs == 1) {
/* XXX: cover this with the generic >1 case? */
duk_push_string(ctx, "");
} else {
duk_insert(ctx, 0); /* [ arg1 ... argN-1 body] -> [body arg1 ... argN-1] */
duk_push_string(ctx, ",");
duk_insert(ctx, 1);
duk_join(ctx, nargs - 1);
}
/* [ body formals ], formals is comma separated list that needs to be parsed */
DUK_ASSERT_TOP(ctx, 2);
/* XXX: this placeholder is not always correct, but use for now.
* It will fail in corner cases; see test-dev-func-cons-args.js.
*/
duk_push_string(ctx, "function(");
duk_dup(ctx, 1);
duk_push_string(ctx, "){");
duk_dup(ctx, 0);
duk_push_string(ctx, "}");
duk_concat(ctx, 5);
/* [ body formals source ] */
DUK_ASSERT_TOP(ctx, 3);
/* strictness is not inherited, intentional */
comp_flags = DUK_JS_COMPILE_FLAG_FUNCEXPR;
duk_push_hstring_stridx(ctx, DUK_STRIDX_COMPILE); /* XXX: copy from caller? */ /* XXX: ignored now */
h_sourcecode = duk_require_hstring(ctx, -2);
duk_js_compile(thr,
(const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_sourcecode),
(duk_size_t) DUK_HSTRING_GET_BYTELEN(h_sourcecode),
comp_flags);
func = (duk_hcompiledfunction *) duk_get_hobject(ctx, -1);
DUK_ASSERT(func != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION((duk_hobject *) func));
/* [ body formals source template ] */
/* only outer_lex_env matters, as functions always get a new
* variable declaration environment.
*/
outer_lex_env = thr->builtins[DUK_BIDX_GLOBAL_ENV];
outer_var_env = thr->builtins[DUK_BIDX_GLOBAL_ENV];
duk_js_push_closure(thr, func, outer_var_env, outer_lex_env, 1 /*add_auto_proto*/);
/* [ body formals source template closure ] */
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_function_prototype(duk_context *ctx) {
/* ignore arguments, return undefined (E5 Section 15.3.4) */
DUK_UNREF(ctx);
return 0;
}
DUK_INTERNAL duk_ret_t duk_bi_function_prototype_to_string(duk_context *ctx) {
duk_tval *tv;
/*
* E5 Section 15.3.4.2 places few requirements on the output of
* this function:
*
* - The result is an implementation dependent representation
* of the function; in particular
*
* - The result must follow the syntax of a FunctionDeclaration.
* In particular, the function must have a name (even in the
* case of an anonymous function or a function with an empty
* name).
*
* - Note in particular that the output does NOT need to compile
* into anything useful.
*/
/* XXX: faster internal way to get this */
duk_push_this(ctx);
tv = duk_get_tval(ctx, -1);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_OBJECT(tv)) {
duk_hobject *obj = DUK_TVAL_GET_OBJECT(tv);
const char *func_name;
/* Function name: missing/undefined is mapped to empty string,
* otherwise coerce to string.
*/
/* XXX: currently no handling for non-allowed identifier characters,
* e.g. a '{' in the function name.
*/
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_NAME);
if (duk_is_undefined(ctx, -1)) {
func_name = "";
} else {
func_name = duk_to_string(ctx, -1);
DUK_ASSERT(func_name != NULL);
}
/* Indicate function type in the function body using a dummy
* directive.
*/
if (DUK_HOBJECT_HAS_COMPILEDFUNCTION(obj)) {
duk_push_sprintf(ctx, "function %s() {\"ecmascript\"}", (const char *) func_name);
} else if (DUK_HOBJECT_HAS_NATIVEFUNCTION(obj)) {
duk_push_sprintf(ctx, "function %s() {\"native\"}", (const char *) func_name);
} else if (DUK_HOBJECT_HAS_BOUND(obj)) {
duk_push_sprintf(ctx, "function %s() {\"bound\"}", (const char *) func_name);
} else {
goto type_error;
}
} else if (DUK_TVAL_IS_LIGHTFUNC(tv)) {
duk_push_lightfunc_tostring(ctx, tv);
} else {
goto type_error;
}
return 1;
type_error:
return DUK_RET_TYPE_ERROR;
}
DUK_INTERNAL duk_ret_t duk_bi_function_prototype_apply(duk_context *ctx) {
duk_idx_t len;
duk_idx_t i;
DUK_ASSERT_TOP(ctx, 2); /* not a vararg function */
duk_push_this(ctx);
if (!duk_is_callable(ctx, -1)) {
DUK_DDD(DUK_DDDPRINT("func is not callable"));
goto type_error;
}
duk_insert(ctx, 0);
DUK_ASSERT_TOP(ctx, 3);
DUK_DDD(DUK_DDDPRINT("func=%!iT, thisArg=%!iT, argArray=%!iT",
(duk_tval *) duk_get_tval(ctx, 0),
(duk_tval *) duk_get_tval(ctx, 1),
(duk_tval *) duk_get_tval(ctx, 2)));
/* [ func thisArg argArray ] */
if (duk_is_null_or_undefined(ctx, 2)) {
DUK_DDD(DUK_DDDPRINT("argArray is null/undefined, no args"));
len = 0;
} else if (!duk_is_object(ctx, 2)) {
goto type_error;
} else {
DUK_DDD(DUK_DDDPRINT("argArray is an object"));
/* XXX: make this an internal helper */
duk_get_prop_stridx(ctx, 2, DUK_STRIDX_LENGTH);
len = (duk_idx_t) duk_to_uint32(ctx, -1); /* ToUint32() coercion required */
duk_pop(ctx);
duk_require_stack(ctx, len);
DUK_DDD(DUK_DDDPRINT("argArray length is %ld", (long) len));
for (i = 0; i < len; i++) {
duk_get_prop_index(ctx, 2, i);
}
}
duk_remove(ctx, 2);
DUK_ASSERT_TOP(ctx, 2 + len);
/* [ func thisArg arg1 ... argN ] */
DUK_DDD(DUK_DDDPRINT("apply, func=%!iT, thisArg=%!iT, len=%ld",
(duk_tval *) duk_get_tval(ctx, 0),
(duk_tval *) duk_get_tval(ctx, 1),
(long) len));
duk_call_method(ctx, len);
return 1;
type_error:
return DUK_RET_TYPE_ERROR;
}
DUK_INTERNAL duk_ret_t duk_bi_function_prototype_call(duk_context *ctx) {
duk_idx_t nargs;
/* Step 1 is not necessary because duk_call_method() will take
* care of it.
*/
/* vararg function, thisArg needs special handling */
nargs = duk_get_top(ctx); /* = 1 + arg count */
if (nargs == 0) {
duk_push_undefined(ctx);
nargs++;
}
DUK_ASSERT(nargs >= 1);
/* [ thisArg arg1 ... argN ] */
duk_push_this(ctx); /* 'func' in the algorithm */
duk_insert(ctx, 0);
/* [ func thisArg arg1 ... argN ] */
DUK_DDD(DUK_DDDPRINT("func=%!iT, thisArg=%!iT, argcount=%ld, top=%ld",
(duk_tval *) duk_get_tval(ctx, 0),
(duk_tval *) duk_get_tval(ctx, 1),
(long) (nargs - 1),
(long) duk_get_top(ctx)));
duk_call_method(ctx, nargs - 1);
return 1;
}
/* XXX: the implementation now assumes "chained" bound functions,
* whereas "collapsed" bound functions (where there is ever only
* one bound function which directly points to a non-bound, final
* function) would require a "collapsing" implementation which
* merges argument lists etc here.
*/
DUK_INTERNAL duk_ret_t duk_bi_function_prototype_bind(duk_context *ctx) {
duk_hobject *h_bound;
duk_hobject *h_target;
duk_idx_t nargs;
duk_idx_t i;
/* vararg function, careful arg handling (e.g. thisArg may not be present) */
nargs = duk_get_top(ctx); /* = 1 + arg count */
if (nargs == 0) {
duk_push_undefined(ctx);
nargs++;
}
DUK_ASSERT(nargs >= 1);
duk_push_this(ctx);
if (!duk_is_callable(ctx, -1)) {
DUK_DDD(DUK_DDDPRINT("func is not callable"));
goto type_error;
}
/* [ thisArg arg1 ... argN func ] (thisArg+args == nargs total) */
DUK_ASSERT_TOP(ctx, nargs + 1);
/* create bound function object */
duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_BOUND |
DUK_HOBJECT_FLAG_CONSTRUCTABLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_FUNCTION),
DUK_BIDX_FUNCTION_PROTOTYPE);
h_bound = duk_get_hobject(ctx, -1);
DUK_ASSERT(h_bound != NULL);
/* [ thisArg arg1 ... argN func boundFunc ] */
duk_dup(ctx, -2); /* func */
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_TARGET, DUK_PROPDESC_FLAGS_NONE);
duk_dup(ctx, 0); /* thisArg */
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_THIS, DUK_PROPDESC_FLAGS_NONE);
duk_push_array(ctx);
/* [ thisArg arg1 ... argN func boundFunc argArray ] */
for (i = 0; i < nargs - 1; i++) {
duk_dup(ctx, 1 + i);
duk_put_prop_index(ctx, -2, i);
}
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_ARGS, DUK_PROPDESC_FLAGS_NONE);
/* [ thisArg arg1 ... argN func boundFunc ] */
/* bound function 'length' property is interesting */
h_target = duk_get_hobject(ctx, -2);
if (h_target == NULL || /* lightfunc */
DUK_HOBJECT_GET_CLASS_NUMBER(h_target) == DUK_HOBJECT_CLASS_FUNCTION) {
/* For lightfuncs, simply read the virtual property. */
duk_int_t tmp;
duk_get_prop_stridx(ctx, -2, DUK_STRIDX_LENGTH);
tmp = duk_to_int(ctx, -1) - (nargs - 1); /* step 15.a */
duk_pop(ctx);
duk_push_int(ctx, (tmp < 0 ? 0 : tmp));
} else {
duk_push_int(ctx, 0);
}
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_NONE); /* attrs in E5 Section 15.3.5.1 */
/* caller and arguments must use the same thrower, [[ThrowTypeError]] */
duk_xdef_prop_stridx_thrower(ctx, -1, DUK_STRIDX_CALLER, DUK_PROPDESC_FLAGS_NONE);
duk_xdef_prop_stridx_thrower(ctx, -1, DUK_STRIDX_LC_ARGUMENTS, DUK_PROPDESC_FLAGS_NONE);
/* these non-standard properties are copied for convenience */
/* XXX: 'copy properties' API call? */
duk_get_prop_stridx(ctx, -2, DUK_STRIDX_NAME);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_WC);
duk_get_prop_stridx(ctx, -2, DUK_STRIDX_FILE_NAME);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_FILE_NAME, DUK_PROPDESC_FLAGS_WC);
/* The 'strict' flag is copied to get the special [[Get]] of E5.1
* Section 15.3.5.4 to apply when a 'caller' value is a strict bound
* function. Not sure if this is correct, because the specification
* is a bit ambiguous on this point but it would make sense.
*/
if (h_target == NULL) {
/* Lightfuncs are always strict. */
DUK_HOBJECT_SET_STRICT(h_bound);
} else if (DUK_HOBJECT_HAS_STRICT(h_target)) {
DUK_HOBJECT_SET_STRICT(h_bound);
}
DUK_DDD(DUK_DDDPRINT("created bound function: %!iT", (duk_tval *) duk_get_tval(ctx, -1)));
return 1;
type_error:
return DUK_RET_TYPE_ERROR;
}
#line 1 "duk_bi_global.c"
/*
* Global object built-ins
*/
/* include removed: duk_internal.h */
/*
* Encoding/decoding helpers
*/
/* XXX: Could add fast path (for each transform callback) with direct byte
* lookups (no shifting) and no explicit check for x < 0x80 before table
* lookup.
*/
/* Macros for creating and checking bitmasks for character encoding.
* Bit number is a bit counterintuitive, but minimizes code size.
*/
#define DUK__MKBITS(a,b,c,d,e,f,g,h) ((duk_uint8_t) ( \
((a) << 0) | ((b) << 1) | ((c) << 2) | ((d) << 3) | \
((e) << 4) | ((f) << 5) | ((g) << 6) | ((h) << 7) \
))
#define DUK__CHECK_BITMASK(table,cp) ((table)[(cp) >> 3] & (1 << ((cp) & 0x07)))
/* E5.1 Section 15.1.3.3: uriReserved + uriUnescaped + '#' */
DUK_LOCAL const duk_uint8_t duk__encode_uriunescaped_table[16] = {
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x00-0x0f */
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x10-0x1f */
DUK__MKBITS(0, 1, 0, 1, 1, 0, 1, 1), DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), /* 0x20-0x2f */
DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 1, 0, 1, 0, 1), /* 0x30-0x3f */
DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), /* 0x40-0x4f */
DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 0, 0, 0, 0, 1), /* 0x50-0x5f */
DUK__MKBITS(0, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), /* 0x60-0x6f */
DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 0, 0, 0, 1, 0), /* 0x70-0x7f */
};
/* E5.1 Section 15.1.3.4: uriUnescaped */
DUK_LOCAL const duk_uint8_t duk__encode_uricomponent_unescaped_table[16] = {
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x00-0x0f */
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x10-0x1f */
DUK__MKBITS(0, 1, 0, 0, 0, 0, 0, 1), DUK__MKBITS(1, 1, 1, 0, 0, 1, 1, 0), /* 0x20-0x2f */
DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 0, 0, 0, 0, 0, 0), /* 0x30-0x3f */
DUK__MKBITS(0, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), /* 0x40-0x4f */
DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 0, 0, 0, 0, 1), /* 0x50-0x5f */
DUK__MKBITS(0, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), /* 0x60-0x6f */
DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 0, 0, 0, 1, 0), /* 0x70-0x7f */
};
/* E5.1 Section 15.1.3.1: uriReserved + '#' */
DUK_LOCAL const duk_uint8_t duk__decode_uri_reserved_table[16] = {
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x00-0x0f */
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x10-0x1f */
DUK__MKBITS(0, 0, 0, 1, 1, 0, 1, 0), DUK__MKBITS(0, 0, 0, 1, 1, 0, 0, 1), /* 0x20-0x2f */
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 1, 1, 0, 1, 0, 1), /* 0x30-0x3f */
DUK__MKBITS(1, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x40-0x4f */
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x50-0x5f */
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x60-0x6f */
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x70-0x7f */
};
/* E5.1 Section 15.1.3.2: empty */
DUK_LOCAL const duk_uint8_t duk__decode_uri_component_reserved_table[16] = {
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x00-0x0f */
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x10-0x1f */
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x20-0x2f */
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x30-0x3f */
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x40-0x4f */
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x50-0x5f */
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x60-0x6f */
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x70-0x7f */
};
#ifdef DUK_USE_SECTION_B
/* E5.1 Section B.2.2, step 7. */
DUK_LOCAL const duk_uint8_t duk__escape_unescaped_table[16] = {
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x00-0x0f */
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), /* 0x10-0x1f */
DUK__MKBITS(0, 0, 0, 0, 0, 0, 0, 0), DUK__MKBITS(0, 0, 1, 1, 0, 1, 1, 1), /* 0x20-0x2f */
DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 0, 0, 0, 0, 0, 0), /* 0x30-0x3f */
DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), /* 0x40-0x4f */
DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 0, 0, 0, 0, 1), /* 0x50-0x5f */
DUK__MKBITS(0, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), /* 0x60-0x6f */
DUK__MKBITS(1, 1, 1, 1, 1, 1, 1, 1), DUK__MKBITS(1, 1, 1, 0, 0, 0, 0, 0) /* 0x70-0x7f */
};
#endif /* DUK_USE_SECTION_B */
#undef DUK__MKBITS
typedef struct {
duk_hthread *thr;
duk_hstring *h_str;
duk_bufwriter_ctx bw;
const duk_uint8_t *p;
const duk_uint8_t *p_start;
const duk_uint8_t *p_end;
} duk__transform_context;
typedef void (*duk__transform_callback)(duk__transform_context *tfm_ctx, const void *udata, duk_codepoint_t cp);
/* XXX: refactor and share with other code */
DUK_LOCAL duk_small_int_t duk__decode_hex_escape(const duk_uint8_t *p, duk_small_int_t n) {
duk_small_int_t ch;
duk_small_int_t t = 0;
while (n > 0) {
t = t * 16;
ch = (duk_small_int_t) duk_hex_dectab[*p++];
if (DUK_LIKELY(ch >= 0)) {
t += ch;
} else {
return -1;
}
n--;
}
return t;
}
DUK_LOCAL int duk__transform_helper(duk_context *ctx, duk__transform_callback callback, const void *udata) {
duk_hthread *thr = (duk_hthread *) ctx;
duk__transform_context tfm_ctx_alloc;
duk__transform_context *tfm_ctx = &tfm_ctx_alloc;
duk_codepoint_t cp;
tfm_ctx->thr = thr;
tfm_ctx->h_str = duk_to_hstring(ctx, 0);
DUK_ASSERT(tfm_ctx->h_str != NULL);
DUK_BW_INIT_PUSHBUF(thr, &tfm_ctx->bw, DUK_HSTRING_GET_BYTELEN(tfm_ctx->h_str)); /* initial size guess */
tfm_ctx->p_start = DUK_HSTRING_GET_DATA(tfm_ctx->h_str);
tfm_ctx->p_end = tfm_ctx->p_start + DUK_HSTRING_GET_BYTELEN(tfm_ctx->h_str);
tfm_ctx->p = tfm_ctx->p_start;
while (tfm_ctx->p < tfm_ctx->p_end) {
cp = (duk_codepoint_t) duk_unicode_decode_xutf8_checked(thr, &tfm_ctx->p, tfm_ctx->p_start, tfm_ctx->p_end);
callback(tfm_ctx, udata, cp);
}
DUK_BW_COMPACT(thr, &tfm_ctx->bw);
duk_to_string(ctx, -1);
return 1;
}
DUK_LOCAL void duk__transform_callback_encode_uri(duk__transform_context *tfm_ctx, const void *udata, duk_codepoint_t cp) {
duk_uint8_t xutf8_buf[DUK_UNICODE_MAX_XUTF8_LENGTH];
duk_small_int_t len;
duk_codepoint_t cp1, cp2;
duk_small_int_t i, t;
const duk_uint8_t *unescaped_table = (const duk_uint8_t *) udata;
/* UTF-8 encoded bytes escaped as %xx%xx%xx... -> 3 * nbytes.
* Codepoint range is restricted so this is a slightly too large
* but doesn't matter.
*/
DUK_BW_ENSURE(tfm_ctx->thr, &tfm_ctx->bw, 3 * DUK_UNICODE_MAX_XUTF8_LENGTH);
if (cp < 0) {
goto uri_error;
} else if ((cp < 0x80L) && DUK__CHECK_BITMASK(unescaped_table, cp)) {
DUK_BW_WRITE_RAW_U8(tfm_ctx->thr, &tfm_ctx->bw, (duk_uint8_t) cp);
return;
} else if (cp >= 0xdc00L && cp <= 0xdfffL) {
goto uri_error;
} else if (cp >= 0xd800L && cp <= 0xdbffL) {
/* Needs lookahead */
if (duk_unicode_decode_xutf8(tfm_ctx->thr, &tfm_ctx->p, tfm_ctx->p_start, tfm_ctx->p_end, (duk_ucodepoint_t *) &cp2) == 0) {
goto uri_error;
}
if (!(cp2 >= 0xdc00L && cp2 <= 0xdfffL)) {
goto uri_error;
}
cp1 = cp;
cp = ((cp1 - 0xd800L) << 10) + (cp2 - 0xdc00L) + 0x10000L;
} else if (cp > 0x10ffffL) {
/* Although we can allow non-BMP characters (they'll decode
* back into surrogate pairs), we don't allow extended UTF-8
* characters; they would encode to URIs which won't decode
* back because of strict UTF-8 checks in URI decoding.
* (However, we could just as well allow them here.)
*/
goto uri_error;
} else {
/* Non-BMP characters within valid UTF-8 range: encode as is.
* They'll decode back into surrogate pairs if the escaped
* output is decoded.
*/
;
}
len = duk_unicode_encode_xutf8((duk_ucodepoint_t) cp, xutf8_buf);
for (i = 0; i < len; i++) {
t = (int) xutf8_buf[i];
DUK_BW_WRITE_RAW_U8_3(tfm_ctx->thr,
&tfm_ctx->bw,
DUK_ASC_PERCENT,
(duk_uint8_t) duk_uc_nybbles[t >> 4],
(duk_uint8_t) duk_uc_nybbles[t & 0x0f]);
}
return;
uri_error:
DUK_ERROR(tfm_ctx->thr, DUK_ERR_URI_ERROR, "invalid input");
}
DUK_LOCAL void duk__transform_callback_decode_uri(duk__transform_context *tfm_ctx, const void *udata, duk_codepoint_t cp) {
const duk_uint8_t *reserved_table = (const duk_uint8_t *) udata;
duk_small_uint_t utf8_blen;
duk_codepoint_t min_cp;
duk_small_int_t t; /* must be signed */
duk_small_uint_t i;
/* Maximum write size: XUTF8 path writes max DUK_UNICODE_MAX_XUTF8_LENGTH,
* percent escape path writes max two times CESU-8 encoded BMP length.
*/
DUK_BW_ENSURE(tfm_ctx->thr,
&tfm_ctx->bw,
(DUK_UNICODE_MAX_XUTF8_LENGTH >= 2 * DUK_UNICODE_MAX_CESU8_BMP_LENGTH ?
DUK_UNICODE_MAX_XUTF8_LENGTH : DUK_UNICODE_MAX_CESU8_BMP_LENGTH));
if (cp == (duk_codepoint_t) '%') {
const duk_uint8_t *p = tfm_ctx->p;
duk_size_t left = (duk_size_t) (tfm_ctx->p_end - p); /* bytes left */
DUK_DDD(DUK_DDDPRINT("percent encoding, left=%ld", (long) left));
if (left < 2) {
goto uri_error;
}
t = duk__decode_hex_escape(p, 2);
DUK_DDD(DUK_DDDPRINT("first byte: %ld", (long) t));
if (t < 0) {
goto uri_error;
}
if (t < 0x80) {
if (DUK__CHECK_BITMASK(reserved_table, t)) {
/* decode '%xx' to '%xx' if decoded char in reserved set */
DUK_ASSERT(tfm_ctx->p - 1 >= tfm_ctx->p_start);
DUK_BW_WRITE_RAW_U8_3(tfm_ctx->thr,
&tfm_ctx->bw,
DUK_ASC_PERCENT,
p[0],
p[1]);
} else {
DUK_BW_WRITE_RAW_U8(tfm_ctx->thr, &tfm_ctx->bw, (duk_uint8_t) t);
}
tfm_ctx->p += 2;
return;
}
/* Decode UTF-8 codepoint from a sequence of hex escapes. The
* first byte of the sequence has been decoded to 't'.
*
* Note that UTF-8 validation must be strict according to the
* specification: E5.1 Section 15.1.3, decode algorithm step
* 4.d.vii.8. URIError from non-shortest encodings is also
* specifically noted in the spec.
*/
DUK_ASSERT(t >= 0x80);
if (t < 0xc0) {
/* continuation byte */
goto uri_error;
} else if (t < 0xe0) {
/* 110x xxxx; 2 bytes */
utf8_blen = 2;
min_cp = 0x80L;
cp = t & 0x1f;
} else if (t < 0xf0) {
/* 1110 xxxx; 3 bytes */
utf8_blen = 3;
min_cp = 0x800L;
cp = t & 0x0f;
} else if (t < 0xf8) {
/* 1111 0xxx; 4 bytes */
utf8_blen = 4;
min_cp = 0x10000L;
cp = t & 0x07;
} else {
/* extended utf-8 not allowed for URIs */
goto uri_error;
}
if (left < utf8_blen * 3 - 1) {
/* '%xx%xx...%xx', p points to char after first '%' */
goto uri_error;
}
p += 3;
for (i = 1; i < utf8_blen; i++) {
/* p points to digit part ('%xy', p points to 'x') */
t = duk__decode_hex_escape(p, 2);
DUK_DDD(DUK_DDDPRINT("i=%ld utf8_blen=%ld cp=%ld t=0x%02lx",
(long) i, (long) utf8_blen, (long) cp, (unsigned long) t));
if (t < 0) {
goto uri_error;
}
if ((t & 0xc0) != 0x80) {
goto uri_error;
}
cp = (cp << 6) + (t & 0x3f);
p += 3;
}
p--; /* p overshoots */
tfm_ctx->p = p;
DUK_DDD(DUK_DDDPRINT("final cp=%ld, min_cp=%ld", (long) cp, (long) min_cp));
if (cp < min_cp || cp > 0x10ffffL || (cp >= 0xd800L && cp <= 0xdfffL)) {
goto uri_error;
}
/* The E5.1 algorithm checks whether or not a decoded codepoint
* is below 0x80 and perhaps may be in the "reserved" set.
* This seems pointless because the single byte UTF-8 case is
* handled separately, and non-shortest encodings are rejected.
* So, 'cp' cannot be below 0x80 here, and thus cannot be in
* the reserved set.
*/
/* utf-8 validation ensures these */
DUK_ASSERT(cp >= 0x80L && cp <= 0x10ffffL);
if (cp >= 0x10000L) {
cp -= 0x10000L;
DUK_ASSERT(cp < 0x100000L);
DUK_BW_WRITE_RAW_XUTF8(tfm_ctx->thr, &tfm_ctx->bw, ((cp >> 10) + 0xd800L));
DUK_BW_WRITE_RAW_XUTF8(tfm_ctx->thr, &tfm_ctx->bw, ((cp & 0x03ffUL) + 0xdc00L));
} else {
DUK_BW_WRITE_RAW_XUTF8(tfm_ctx->thr, &tfm_ctx->bw, cp);
}
} else {
DUK_BW_WRITE_RAW_XUTF8(tfm_ctx->thr, &tfm_ctx->bw, cp);
}
return;
uri_error:
DUK_ERROR(tfm_ctx->thr, DUK_ERR_URI_ERROR, "invalid input");
}
#ifdef DUK_USE_SECTION_B
DUK_LOCAL void duk__transform_callback_escape(duk__transform_context *tfm_ctx, const void *udata, duk_codepoint_t cp) {
DUK_UNREF(udata);
DUK_BW_ENSURE(tfm_ctx->thr, &tfm_ctx->bw, 6);
if (cp < 0) {
goto esc_error;
} else if ((cp < 0x80L) && DUK__CHECK_BITMASK(duk__escape_unescaped_table, cp)) {
DUK_BW_WRITE_RAW_U8(tfm_ctx->thr, &tfm_ctx->bw, (duk_uint8_t) cp);
} else if (cp < 0x100L) {
DUK_BW_WRITE_RAW_U8_3(tfm_ctx->thr,
&tfm_ctx->bw,
(duk_uint8_t) DUK_ASC_PERCENT,
(duk_uint8_t) duk_uc_nybbles[cp >> 4],
(duk_uint8_t) duk_uc_nybbles[cp & 0x0f]);
} else if (cp < 0x10000L) {
DUK_BW_WRITE_RAW_U8_6(tfm_ctx->thr,
&tfm_ctx->bw,
(duk_uint8_t) DUK_ASC_PERCENT,
(duk_uint8_t) DUK_ASC_LC_U,
(duk_uint8_t) duk_uc_nybbles[cp >> 12],
(duk_uint8_t) duk_uc_nybbles[(cp >> 8) & 0x0f],
(duk_uint8_t) duk_uc_nybbles[(cp >> 4) & 0x0f],
(duk_uint8_t) duk_uc_nybbles[cp & 0x0f]);
} else {
/* Characters outside BMP cannot be escape()'d. We could
* encode them as surrogate pairs (for codepoints inside
* valid UTF-8 range, but not extended UTF-8). Because
* escape() and unescape() are legacy functions, we don't.
*/
goto esc_error;
}
return;
esc_error:
DUK_ERROR_TYPE(tfm_ctx->thr, "invalid input");
}
DUK_LOCAL void duk__transform_callback_unescape(duk__transform_context *tfm_ctx, const void *udata, duk_codepoint_t cp) {
duk_small_int_t t;
DUK_UNREF(udata);
if (cp == (duk_codepoint_t) '%') {
const duk_uint8_t *p = tfm_ctx->p;
duk_size_t left = (duk_size_t) (tfm_ctx->p_end - p); /* bytes left */
if (left >= 5 && p[0] == 'u' &&
((t = duk__decode_hex_escape(p + 1, 4)) >= 0)) {
cp = (duk_codepoint_t) t;
tfm_ctx->p += 5;
} else if (left >= 2 &&
((t = duk__decode_hex_escape(p, 2)) >= 0)) {
cp = (duk_codepoint_t) t;
tfm_ctx->p += 2;
}
}
DUK_BW_WRITE_ENSURE_XUTF8(tfm_ctx->thr, &tfm_ctx->bw, cp);
}
#endif /* DUK_USE_SECTION_B */
/*
* Eval
*
* Eval needs to handle both a "direct eval" and an "indirect eval".
* Direct eval handling needs access to the caller's activation so that its
* lexical environment can be accessed. A direct eval is only possible from
* Ecmascript code; an indirect eval call is possible also from C code.
* When an indirect eval call is made from C code, there may not be a
* calling activation at all which needs careful handling.
*/
DUK_INTERNAL duk_ret_t duk_bi_global_object_eval(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hstring *h;
duk_activation *act_caller;
duk_activation *act_eval;
duk_activation *act;
duk_hcompiledfunction *func;
duk_hobject *outer_lex_env;
duk_hobject *outer_var_env;
duk_bool_t this_to_global = 1;
duk_small_uint_t comp_flags;
duk_int_t level = -2;
DUK_ASSERT(duk_get_top(ctx) == 1 || duk_get_top(ctx) == 2); /* 2 when called by debugger */
DUK_ASSERT(thr->callstack_top >= 1); /* at least this function exists */
DUK_ASSERT(((thr->callstack + thr->callstack_top - 1)->flags & DUK_ACT_FLAG_DIRECT_EVAL) == 0 || /* indirect eval */
(thr->callstack_top >= 2)); /* if direct eval, calling activation must exist */
/*
* callstack_top - 1 --> this function
* callstack_top - 2 --> caller (may not exist)
*
* If called directly from C, callstack_top might be 1. If calling
* activation doesn't exist, call must be indirect.
*/
h = duk_get_hstring(ctx, 0);
if (!h) {
return 1; /* return arg as-is */
}
#if defined(DUK_USE_DEBUGGER_SUPPORT)
/* NOTE: level is used only by the debugger and should never be present
* for an Ecmascript eval().
*/
DUK_ASSERT(level == -2); /* by default, use caller's environment */
if (duk_get_top(ctx) >= 2 && duk_is_number(ctx, 1)) {
level = duk_get_int(ctx, 1);
}
DUK_ASSERT(level <= -2); /* This is guaranteed by debugger code. */
#endif
/* [ source ] */
comp_flags = DUK_JS_COMPILE_FLAG_EVAL;
act_eval = thr->callstack + thr->callstack_top - 1; /* this function */
if (thr->callstack_top >= (duk_size_t) -level) {
/* Have a calling activation, check for direct eval (otherwise
* assume indirect eval.
*/
act_caller = thr->callstack + thr->callstack_top + level; /* caller */
if ((act_caller->flags & DUK_ACT_FLAG_STRICT) &&
(act_eval->flags & DUK_ACT_FLAG_DIRECT_EVAL)) {
/* Only direct eval inherits strictness from calling code
* (E5.1 Section 10.1.1).
*/
comp_flags |= DUK_JS_COMPILE_FLAG_STRICT;
}
} else {
DUK_ASSERT((act_eval->flags & DUK_ACT_FLAG_DIRECT_EVAL) == 0);
}
act_caller = NULL; /* avoid dereference after potential callstack realloc */
act_eval = NULL;
duk_push_hstring_stridx(ctx, DUK_STRIDX_INPUT); /* XXX: copy from caller? */
duk_js_compile(thr,
(const duk_uint8_t *) DUK_HSTRING_GET_DATA(h),
(duk_size_t) DUK_HSTRING_GET_BYTELEN(h),
comp_flags);
func = (duk_hcompiledfunction *) duk_get_hobject(ctx, -1);
DUK_ASSERT(func != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION((duk_hobject *) func));
/* [ source template ] */
/* E5 Section 10.4.2 */
DUK_ASSERT(thr->callstack_top >= 1);
act = thr->callstack + thr->callstack_top - 1; /* this function */
if (act->flags & DUK_ACT_FLAG_DIRECT_EVAL) {
DUK_ASSERT(thr->callstack_top >= 2);
act = thr->callstack + thr->callstack_top + level; /* caller */
if (act->lex_env == NULL) {
DUK_ASSERT(act->var_env == NULL);
DUK_DDD(DUK_DDDPRINT("delayed environment initialization"));
/* this may have side effects, so re-lookup act */
duk_js_init_activation_environment_records_delayed(thr, act);
act = thr->callstack + thr->callstack_top + level;
}
DUK_ASSERT(act->lex_env != NULL);
DUK_ASSERT(act->var_env != NULL);
this_to_global = 0;
if (DUK_HOBJECT_HAS_STRICT((duk_hobject *) func)) {
duk_hobject *new_env;
duk_hobject *act_lex_env;
DUK_DDD(DUK_DDDPRINT("direct eval call to a strict function -> "
"var_env and lex_env to a fresh env, "
"this_binding to caller's this_binding"));
act = thr->callstack + thr->callstack_top + level; /* caller */
act_lex_env = act->lex_env;
act = NULL; /* invalidated */
(void) duk_push_object_helper_proto(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_DECENV),
act_lex_env);
new_env = duk_require_hobject(ctx, -1);
DUK_ASSERT(new_env != NULL);
DUK_DDD(DUK_DDDPRINT("new_env allocated: %!iO",
(duk_heaphdr *) new_env));
outer_lex_env = new_env;
outer_var_env = new_env;
duk_insert(ctx, 0); /* stash to bottom of value stack to keep new_env reachable for duration of eval */
/* compiler's responsibility */
DUK_ASSERT(DUK_HOBJECT_HAS_NEWENV((duk_hobject *) func));
} else {
DUK_DDD(DUK_DDDPRINT("direct eval call to a non-strict function -> "
"var_env and lex_env to caller's envs, "
"this_binding to caller's this_binding"));
outer_lex_env = act->lex_env;
outer_var_env = act->var_env;
/* compiler's responsibility */
DUK_ASSERT(!DUK_HOBJECT_HAS_NEWENV((duk_hobject *) func));
}
} else {
DUK_DDD(DUK_DDDPRINT("indirect eval call -> var_env and lex_env to "
"global object, this_binding to global object"));
this_to_global = 1;
outer_lex_env = thr->builtins[DUK_BIDX_GLOBAL_ENV];
outer_var_env = thr->builtins[DUK_BIDX_GLOBAL_ENV];
}
act = NULL;
/* Eval code doesn't need an automatic .prototype object. */
duk_js_push_closure(thr, func, outer_var_env, outer_lex_env, 0 /*add_auto_proto*/);
/* [ source template closure ] */
if (this_to_global) {
DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL] != NULL);
duk_push_hobject_bidx(ctx, DUK_BIDX_GLOBAL);
} else {
duk_tval *tv;
DUK_ASSERT(thr->callstack_top >= 2);
act = thr->callstack + thr->callstack_top + level; /* caller */
tv = thr->valstack + act->idx_bottom - 1; /* this is just beneath bottom */
DUK_ASSERT(tv >= thr->valstack);
duk_push_tval(ctx, tv);
}
DUK_DDD(DUK_DDDPRINT("eval -> lex_env=%!iO, var_env=%!iO, this_binding=%!T",
(duk_heaphdr *) outer_lex_env,
(duk_heaphdr *) outer_var_env,
duk_get_tval(ctx, -1)));
/* [ source template closure this ] */
duk_call_method(ctx, 0);
/* [ source template result ] */
return 1;
}
/*
* Parsing of ints and floats
*/
DUK_INTERNAL duk_ret_t duk_bi_global_object_parse_int(duk_context *ctx) {
duk_int32_t radix;
duk_small_uint_t s2n_flags;
DUK_ASSERT_TOP(ctx, 2);
duk_to_string(ctx, 0);
radix = duk_to_int32(ctx, 1);
s2n_flags = DUK_S2N_FLAG_TRIM_WHITE |
DUK_S2N_FLAG_ALLOW_GARBAGE |
DUK_S2N_FLAG_ALLOW_PLUS |
DUK_S2N_FLAG_ALLOW_MINUS |
DUK_S2N_FLAG_ALLOW_LEADING_ZERO |
DUK_S2N_FLAG_ALLOW_AUTO_HEX_INT;
/* Specification stripPrefix maps to DUK_S2N_FLAG_ALLOW_AUTO_HEX_INT.
*
* Don't autodetect octals (from leading zeroes), require user code to
* provide an explicit radix 8 for parsing octal. See write-up from Mozilla:
* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseInt#ECMAScript_5_Removes_Octal_Interpretation
*/
if (radix != 0) {
if (radix < 2 || radix > 36) {
goto ret_nan;
}
if (radix != 16) {
s2n_flags &= ~DUK_S2N_FLAG_ALLOW_AUTO_HEX_INT;
}
} else {
radix = 10;
}
duk_dup(ctx, 0);
duk_numconv_parse(ctx, radix, s2n_flags);
return 1;
ret_nan:
duk_push_nan(ctx);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_global_object_parse_float(duk_context *ctx) {
duk_small_uint_t s2n_flags;
duk_int32_t radix;
DUK_ASSERT_TOP(ctx, 1);
duk_to_string(ctx, 0);
radix = 10;
/* XXX: check flags */
s2n_flags = DUK_S2N_FLAG_TRIM_WHITE |
DUK_S2N_FLAG_ALLOW_EXP |
DUK_S2N_FLAG_ALLOW_GARBAGE |
DUK_S2N_FLAG_ALLOW_PLUS |
DUK_S2N_FLAG_ALLOW_MINUS |
DUK_S2N_FLAG_ALLOW_INF |
DUK_S2N_FLAG_ALLOW_FRAC |
DUK_S2N_FLAG_ALLOW_NAKED_FRAC |
DUK_S2N_FLAG_ALLOW_EMPTY_FRAC |
DUK_S2N_FLAG_ALLOW_LEADING_ZERO;
duk_numconv_parse(ctx, radix, s2n_flags);
return 1;
}
/*
* Number checkers
*/
DUK_INTERNAL duk_ret_t duk_bi_global_object_is_nan(duk_context *ctx) {
duk_double_t d = duk_to_number(ctx, 0);
duk_push_boolean(ctx, DUK_ISNAN(d));
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_global_object_is_finite(duk_context *ctx) {
duk_double_t d = duk_to_number(ctx, 0);
duk_push_boolean(ctx, DUK_ISFINITE(d));
return 1;
}
/*
* URI handling
*/
DUK_INTERNAL duk_ret_t duk_bi_global_object_decode_uri(duk_context *ctx) {
return duk__transform_helper(ctx, duk__transform_callback_decode_uri, (const void *) duk__decode_uri_reserved_table);
}
DUK_INTERNAL duk_ret_t duk_bi_global_object_decode_uri_component(duk_context *ctx) {
return duk__transform_helper(ctx, duk__transform_callback_decode_uri, (const void *) duk__decode_uri_component_reserved_table);
}
DUK_INTERNAL duk_ret_t duk_bi_global_object_encode_uri(duk_context *ctx) {
return duk__transform_helper(ctx, duk__transform_callback_encode_uri, (const void *) duk__encode_uriunescaped_table);
}
DUK_INTERNAL duk_ret_t duk_bi_global_object_encode_uri_component(duk_context *ctx) {
return duk__transform_helper(ctx, duk__transform_callback_encode_uri, (const void *) duk__encode_uricomponent_unescaped_table);
}
#ifdef DUK_USE_SECTION_B
DUK_INTERNAL duk_ret_t duk_bi_global_object_escape(duk_context *ctx) {
return duk__transform_helper(ctx, duk__transform_callback_escape, (const void *) NULL);
}
DUK_INTERNAL duk_ret_t duk_bi_global_object_unescape(duk_context *ctx) {
return duk__transform_helper(ctx, duk__transform_callback_unescape, (const void *) NULL);
}
#else /* DUK_USE_SECTION_B */
DUK_INTERNAL duk_ret_t duk_bi_global_object_escape(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
DUK_INTERNAL duk_ret_t duk_bi_global_object_unescape(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_SECTION_B */
#if defined(DUK_USE_BROWSER_LIKE) && (defined(DUK_USE_FILE_IO) || defined(DUK_USE_DEBUGGER_SUPPORT))
DUK_INTERNAL duk_ret_t duk_bi_global_object_print_helper(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_int_t magic;
duk_idx_t nargs;
const duk_uint8_t *buf;
duk_size_t sz_buf;
const char nl = (const char) DUK_ASC_LF;
#ifndef DUK_USE_PREFER_SIZE
duk_uint8_t buf_stack[256];
#endif
#ifdef DUK_USE_FILE_IO
duk_file *f_out;
#endif
DUK_UNREF(thr);
magic = duk_get_current_magic(ctx);
DUK_UNREF(magic);
nargs = duk_get_top(ctx);
/* If argument count is 1 and first argument is a buffer, write the buffer
* as raw data into the file without a newline; this allows exact control
* over stdout/stderr without an additional entrypoint (useful for now).
*
* Otherwise current print/alert semantics are to ToString() coerce
* arguments, join them with a single space, and append a newline.
*/
if (nargs == 1 && duk_is_buffer(ctx, 0)) {
buf = (const duk_uint8_t *) duk_get_buffer(ctx, 0, &sz_buf);
DUK_ASSERT(buf != NULL);
} else if (nargs > 0) {
#ifdef DUK_USE_PREFER_SIZE
/* Compact but lots of churn. */
duk_push_hstring_stridx(thr, DUK_STRIDX_SPACE);
duk_insert(ctx, 0);
duk_join(ctx, nargs);
duk_push_string(thr, "\n");
duk_concat(ctx, 2);
buf = (const duk_uint8_t *) duk_get_lstring(ctx, -1, &sz_buf);
DUK_ASSERT(buf != NULL);
#else /* DUK_USE_PREFER_SIZE */
/* Higher footprint, less churn. */
duk_idx_t i;
duk_size_t sz_str;
const duk_uint8_t *p_str;
duk_uint8_t *p;
sz_buf = (duk_size_t) nargs; /* spaces (nargs - 1) + newline */
for (i = 0; i < nargs; i++) {
(void) duk_to_lstring(ctx, i, &sz_str);
sz_buf += sz_str;
}
if (sz_buf <= sizeof(buf_stack)) {
p = (duk_uint8_t *) buf_stack;
} else {
p = (duk_uint8_t *) duk_push_fixed_buffer(ctx, sz_buf);
DUK_ASSERT(p != NULL);
}
buf = (const duk_uint8_t *) p;
for (i = 0; i < nargs; i++) {
p_str = (const duk_uint8_t *) duk_get_lstring(ctx, i, &sz_str);
DUK_ASSERT(p_str != NULL);
DUK_MEMCPY((void *) p, (const void *) p_str, sz_str);
p += sz_str;
*p++ = (duk_uint8_t) (i == nargs - 1 ? DUK_ASC_LF : DUK_ASC_SPACE);
}
DUK_ASSERT((const duk_uint8_t *) p == buf + sz_buf);
#endif /* DUK_USE_PREFER_SIZE */
} else {
buf = (const duk_uint8_t *) &nl;
sz_buf = 1;
}
/* 'buf' contains the string to write, 'sz_buf' contains the length
* (which may be zero).
*/
DUK_ASSERT(buf != NULL);
if (sz_buf == 0) {
return 0;
}
#ifdef DUK_USE_FILE_IO
f_out = (magic ? DUK_STDERR : DUK_STDOUT);
DUK_FWRITE((const void *) buf, 1, (size_t) sz_buf, f_out);
DUK_FFLUSH(f_out);
#endif
#if defined(DUK_USE_DEBUGGER_SUPPORT) && defined(DUK_USE_DEBUGGER_FWD_PRINTALERT)
if (DUK_HEAP_IS_DEBUGGER_ATTACHED(thr->heap)) {
duk_debug_write_notify(thr, magic ? DUK_DBG_CMD_ALERT : DUK_DBG_CMD_PRINT);
duk_debug_write_string(thr, (const char *) buf, sz_buf);
duk_debug_write_eom(thr);
}
#endif
return 0;
}
#elif defined(DUK_USE_BROWSER_LIKE) /* print provider */
DUK_INTERNAL duk_ret_t duk_bi_global_object_print_helper(duk_context *ctx) {
DUK_UNREF(ctx);
return 0;
}
#else /* print provider */
DUK_INTERNAL duk_ret_t duk_bi_global_object_print_helper(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* print provider */
/*
* CommonJS require() and modules support
*/
#if defined(DUK_USE_COMMONJS_MODULES)
DUK_LOCAL void duk__bi_global_resolve_module_id(duk_context *ctx, const char *req_id, const char *mod_id) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_uint8_t buf[DUK_BI_COMMONJS_MODULE_ID_LIMIT];
duk_uint8_t *p;
duk_uint8_t *q;
duk_uint8_t *q_last; /* last component */
duk_int_t int_rc;
DUK_ASSERT(req_id != NULL);
/* mod_id may be NULL */
/*
* A few notes on the algorithm:
*
* - Terms are not allowed to begin with a period unless the term
* is either '.' or '..'. This simplifies implementation (and
* is within CommonJS modules specification).
*
* - There are few output bound checks here. This is on purpose:
* the resolution input is length checked and the output is never
* longer than the input. The resolved output is written directly
* over the input because it's never longer than the input at any
* point in the algorithm.
*
* - Non-ASCII characters are processed as individual bytes and
* need no special treatment. However, U+0000 terminates the
* algorithm; this is not an issue because U+0000 is not a
* desirable term character anyway.
*/
/*
* Set up the resolution input which is the requested ID directly
* (if absolute or no current module path) or with current module
* ID prepended (if relative and current module path exists).
*
* Suppose current module is 'foo/bar' and relative path is './quux'.
* The 'bar' component must be replaced so the initial input here is
* 'foo/bar/.././quux'.
*/
if (mod_id != NULL && req_id[0] == '.') {
int_rc = DUK_SNPRINTF((char *) buf, sizeof(buf), "%s/../%s", mod_id, req_id);
} else {
int_rc = DUK_SNPRINTF((char *) buf, sizeof(buf), "%s", req_id);
}
if (int_rc >= (duk_int_t) sizeof(buf) || int_rc < 0) {
/* Potentially truncated, NUL not guaranteed in any case.
* The (int_rc < 0) case should not occur in practice.
*/
DUK_DD(DUK_DDPRINT("resolve error: temporary working module ID doesn't fit into resolve buffer"));
goto resolve_error;
}
DUK_ASSERT(DUK_STRLEN((const char *) buf) < sizeof(buf)); /* at most sizeof(buf) - 1 */
DUK_DDD(DUK_DDDPRINT("input module id: '%s'", (const char *) buf));
/*
* Resolution loop. At the top of the loop we're expecting a valid
* term: '.', '..', or a non-empty identifier not starting with a period.
*/
p = buf;
q = buf;
for (;;) {
duk_uint_fast8_t c;
/* Here 'p' always points to the start of a term.
*
* We can also unconditionally reset q_last here: if this is
* the last (non-empty) term q_last will have the right value
* on loop exit.
*/
DUK_ASSERT(p >= q); /* output is never longer than input during resolution */
DUK_DDD(DUK_DDDPRINT("resolve loop top: p -> '%s', q=%p, buf=%p",
(const char *) p, (void *) q, (void *) buf));
q_last = q;
c = *p++;
if (DUK_UNLIKELY(c == 0)) {
DUK_DD(DUK_DDPRINT("resolve error: requested ID must end with a non-empty term"));
goto resolve_error;
} else if (DUK_UNLIKELY(c == '.')) {
c = *p++;
if (c == '/') {
/* Term was '.' and is eaten entirely (including dup slashes). */
goto eat_dup_slashes;
}
if (c == '.' && *p == '/') {
/* Term was '..', backtrack resolved name by one component.
* q[-1] = previous slash (or beyond start of buffer)
* q[-2] = last char of previous component (or beyond start of buffer)
*/
p++; /* eat (first) input slash */
DUK_ASSERT(q >= buf);
if (q == buf) {
DUK_DD(DUK_DDPRINT("resolve error: term was '..' but nothing to backtrack"));
goto resolve_error;
}
DUK_ASSERT(*(q - 1) == '/');
q--; /* backtrack to last output slash (dups already eliminated) */
for (;;) {
/* Backtrack to previous slash or start of buffer. */
DUK_ASSERT(q >= buf);
if (q == buf) {
break;
}
if (*(q - 1) == '/') {
break;
}
q--;
}
goto eat_dup_slashes;
}
DUK_DD(DUK_DDPRINT("resolve error: term begins with '.' but is not '.' or '..' (not allowed now)"));
goto resolve_error;
} else if (DUK_UNLIKELY(c == '/')) {
/* e.g. require('/foo'), empty terms not allowed */
DUK_DD(DUK_DDPRINT("resolve error: empty term (not allowed now)"));
goto resolve_error;
} else {
for (;;) {
/* Copy term name until end or '/'. */
*q++ = c;
c = *p++;
if (DUK_UNLIKELY(c == 0)) {
/* This was the last term, and q_last was
* updated to match this term at loop top.
*/
goto loop_done;
} else if (DUK_UNLIKELY(c == '/')) {
*q++ = '/';
break;
} else {
/* write on next loop */
}
}
}
eat_dup_slashes:
for (;;) {
/* eat dup slashes */
c = *p;
if (DUK_LIKELY(c != '/')) {
break;
}
p++;
}
}
loop_done:
/* Output #1: resolved absolute name */
DUK_ASSERT(q >= buf);
duk_push_lstring(ctx, (const char *) buf, (size_t) (q - buf));
/* Output #2: last component name */
DUK_ASSERT(q >= q_last);
DUK_ASSERT(q_last >= buf);
duk_push_lstring(ctx, (const char *) q_last, (size_t) (q - q_last));
DUK_DD(DUK_DDPRINT("after resolving module name: buf=%p, q_last=%p, q=%p",
(void *) buf, (void *) q_last, (void *) q));
return;
resolve_error:
DUK_ERROR_FMT1(thr, DUK_ERR_TYPE_ERROR, "cannot resolve module id: %s", (const char *) req_id);
}
#endif /* DUK_USE_COMMONJS_MODULES */
#if defined(DUK_USE_COMMONJS_MODULES)
/* Stack indices for better readability */
#define DUK__IDX_REQUESTED_ID 0 /* Module id requested */
#define DUK__IDX_REQUIRE 1 /* Current require() function */
#define DUK__IDX_REQUIRE_ID 2 /* The base ID of the current require() function, resolution base */
#define DUK__IDX_RESOLVED_ID 3 /* Resolved, normalized absolute module ID */
#define DUK__IDX_LASTCOMP 4 /* Last component name in resolved path */
#define DUK__IDX_DUKTAPE 5 /* Duktape object */
#define DUK__IDX_MODLOADED 6 /* Duktape.modLoaded[] module cache */
#define DUK__IDX_UNDEFINED 7 /* 'undefined', artifact of lookup */
#define DUK__IDX_FRESH_REQUIRE 8 /* New require() function for module, updated resolution base */
#define DUK__IDX_EXPORTS 9 /* Default exports table */
#define DUK__IDX_MODULE 10 /* Module object containing module.exports, etc */
DUK_INTERNAL duk_ret_t duk_bi_global_object_require(duk_context *ctx) {
const char *str_req_id; /* requested identifier */
const char *str_mod_id; /* require.id of current module */
duk_int_t pcall_rc;
/* NOTE: we try to minimize code size by avoiding unnecessary pops,
* so the stack looks a bit cluttered in this function. DUK_ASSERT_TOP()
* assertions are used to ensure stack configuration is correct at each
* step.
*/
/*
* Resolve module identifier into canonical absolute form.
*/
str_req_id = duk_require_string(ctx, DUK__IDX_REQUESTED_ID);
duk_push_current_function(ctx);
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_ID);
str_mod_id = duk_get_string(ctx, DUK__IDX_REQUIRE_ID); /* ignore non-strings */
DUK_DDD(DUK_DDDPRINT("resolve module id: requested=%!T, currentmodule=%!T",
duk_get_tval(ctx, DUK__IDX_REQUESTED_ID),
duk_get_tval(ctx, DUK__IDX_REQUIRE_ID)));
duk__bi_global_resolve_module_id(ctx, str_req_id, str_mod_id);
str_req_id = NULL;
str_mod_id = NULL;
DUK_DDD(DUK_DDDPRINT("resolved module id: requested=%!T, currentmodule=%!T, result=%!T, lastcomp=%!T",
duk_get_tval(ctx, DUK__IDX_REQUESTED_ID),
duk_get_tval(ctx, DUK__IDX_REQUIRE_ID),
duk_get_tval(ctx, DUK__IDX_RESOLVED_ID),
duk_get_tval(ctx, DUK__IDX_LASTCOMP)));
/* [ requested_id require require.id resolved_id last_comp ] */
DUK_ASSERT_TOP(ctx, DUK__IDX_LASTCOMP + 1);
/*
* Cached module check.
*
* If module has been loaded or its loading has already begun without
* finishing, return the same cached value ('exports'). The value is
* registered when module load starts so that circular references can
* be supported to some extent.
*/
duk_push_hobject_bidx(ctx, DUK_BIDX_DUKTAPE);
duk_get_prop_stridx(ctx, DUK__IDX_DUKTAPE, DUK_STRIDX_MOD_LOADED); /* Duktape.modLoaded */
(void) duk_require_hobject(ctx, DUK__IDX_MODLOADED);
DUK_ASSERT_TOP(ctx, DUK__IDX_MODLOADED + 1);
duk_dup(ctx, DUK__IDX_RESOLVED_ID);
if (duk_get_prop(ctx, DUK__IDX_MODLOADED)) {
/* [ requested_id require require.id resolved_id last_comp Duktape Duktape.modLoaded Duktape.modLoaded[id] ] */
DUK_DD(DUK_DDPRINT("module already loaded: %!T",
duk_get_tval(ctx, DUK__IDX_RESOLVED_ID)));
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_EXPORTS); /* return module.exports */
return 1;
}
DUK_ASSERT_TOP(ctx, DUK__IDX_UNDEFINED + 1);
/* [ requested_id require require.id resolved_id last_comp Duktape Duktape.modLoaded undefined ] */
/*
* Module not loaded (and loading not started previously).
*
* Create a new require() function with 'id' set to resolved ID
* of module being loaded. Also create 'exports' and 'module'
* tables but don't register exports to the loaded table yet.
* We don't want to do that unless the user module search callbacks
* succeeds in finding the module.
*/
DUK_D(DUK_DPRINT("loading module %!T, resolution base %!T, requested ID %!T -> resolved ID %!T, last component %!T",
duk_get_tval(ctx, DUK__IDX_RESOLVED_ID),
duk_get_tval(ctx, DUK__IDX_REQUIRE_ID),
duk_get_tval(ctx, DUK__IDX_REQUESTED_ID),
duk_get_tval(ctx, DUK__IDX_RESOLVED_ID),
duk_get_tval(ctx, DUK__IDX_LASTCOMP)));
/* Fresh require: require.id is left configurable (but not writable)
* so that is not easy to accidentally tweak it, but it can still be
* done with Object.defineProperty().
*
* XXX: require.id could also be just made non-configurable, as there
* is no practical reason to touch it.
*/
duk_push_c_function(ctx, duk_bi_global_object_require, 1 /*nargs*/);
duk_push_hstring_stridx(ctx, DUK_STRIDX_REQUIRE);
duk_xdef_prop_stridx(ctx, DUK__IDX_FRESH_REQUIRE, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_NONE);
duk_dup(ctx, DUK__IDX_RESOLVED_ID);
duk_xdef_prop_stridx(ctx, DUK__IDX_FRESH_REQUIRE, DUK_STRIDX_ID, DUK_PROPDESC_FLAGS_C); /* a fresh require() with require.id = resolved target module id */
/* Module table:
* - module.exports: initial exports table (may be replaced by user)
* - module.id is non-writable and non-configurable, as the CommonJS
* spec suggests this if possible
* - module.filename: not set, defaults to resolved ID if not explicitly
* set by modSearch() (note capitalization, not .fileName, matches Node.js)
* - module.name: not set, defaults to last component of resolved ID if
* not explicitly set by modSearch()
*/
duk_push_object(ctx); /* exports */
duk_push_object(ctx); /* module */
duk_dup(ctx, DUK__IDX_EXPORTS);
duk_xdef_prop_stridx(ctx, DUK__IDX_MODULE, DUK_STRIDX_EXPORTS, DUK_PROPDESC_FLAGS_WC); /* module.exports = exports */
duk_dup(ctx, DUK__IDX_RESOLVED_ID); /* resolved id: require(id) must return this same module */
duk_xdef_prop_stridx(ctx, DUK__IDX_MODULE, DUK_STRIDX_ID, DUK_PROPDESC_FLAGS_NONE); /* module.id = resolved_id */
duk_compact(ctx, DUK__IDX_MODULE); /* module table remains registered to modLoaded, minimize its size */
DUK_ASSERT_TOP(ctx, DUK__IDX_MODULE + 1);
DUK_DD(DUK_DDPRINT("module table created: %!T", duk_get_tval(ctx, DUK__IDX_MODULE)));
/* [ requested_id require require.id resolved_id last_comp Duktape Duktape.modLoaded undefined fresh_require exports module ] */
/* Register the module table early to modLoaded[] so that we can
* support circular references even in modSearch(). If an error
* is thrown, we'll delete the reference.
*/
duk_dup(ctx, DUK__IDX_RESOLVED_ID);
duk_dup(ctx, DUK__IDX_MODULE);
duk_put_prop(ctx, DUK__IDX_MODLOADED); /* Duktape.modLoaded[resolved_id] = module */
/*
* Call user provided module search function and build the wrapped
* module source code (if necessary). The module search function
* can be used to implement pure Ecmacsript, pure C, and mixed
* Ecmascript/C modules.
*
* The module search function can operate on the exports table directly
* (e.g. DLL code can register values to it). It can also return a
* string which is interpreted as module source code (if a non-string
* is returned the module is assumed to be a pure C one). If a module
* cannot be found, an error must be thrown by the user callback.
*
* Because Duktape.modLoaded[] already contains the module being
* loaded, circular references for C modules should also work
* (although expected to be quite rare).
*/
duk_push_string(ctx, "(function(require,exports,module){");
/* Duktape.modSearch(resolved_id, fresh_require, exports, module). */
duk_get_prop_stridx(ctx, DUK__IDX_DUKTAPE, DUK_STRIDX_MOD_SEARCH); /* Duktape.modSearch */
duk_dup(ctx, DUK__IDX_RESOLVED_ID);
duk_dup(ctx, DUK__IDX_FRESH_REQUIRE);
duk_dup(ctx, DUK__IDX_EXPORTS);
duk_dup(ctx, DUK__IDX_MODULE); /* [ ... Duktape.modSearch resolved_id last_comp fresh_require exports module ] */
pcall_rc = duk_pcall(ctx, 4 /*nargs*/); /* -> [ ... source ] */
DUK_ASSERT_TOP(ctx, DUK__IDX_MODULE + 3);
if (pcall_rc != DUK_EXEC_SUCCESS) {
/* Delete entry in Duktape.modLoaded[] and rethrow. */
goto delete_rethrow;
}
/* If user callback did not return source code, module loading
* is finished (user callback initialized exports table directly).
*/
if (!duk_is_string(ctx, -1)) {
/* User callback did not return source code, so module loading
* is finished: just update modLoaded with final module.exports
* and we're done.
*/
goto return_exports;
}
/* Finish the wrapped module source. Force module.filename as the
* function .fileName so it gets set for functions defined within a
* module. This also ensures loggers created within the module get
* the module ID (or overridden filename) as their default logger name.
* (Note capitalization: .filename matches Node.js while .fileName is
* used elsewhere in Duktape.)
*/
duk_push_string(ctx, "})");
duk_concat(ctx, 3);
if (!duk_get_prop_stridx(ctx, DUK__IDX_MODULE, DUK_STRIDX_FILENAME)) {
/* module.filename for .fileName, default to resolved ID if
* not present.
*/
duk_pop(ctx);
duk_dup(ctx, DUK__IDX_RESOLVED_ID);
}
duk_eval_raw(ctx, NULL, 0, DUK_COMPILE_EVAL);
/* Module has now evaluated to a wrapped module function. Force its
* .name to match module.name (defaults to last component of resolved
* ID) so that it is shown in stack traces too. Note that we must not
* introduce an actual name binding into the function scope (which is
* usually the case with a named function) because it would affect the
* scope seen by the module and shadow accesses to globals of the same name.
* This is now done by compiling the function as anonymous and then forcing
* its .name without setting a "has name binding" flag.
*/
duk_push_hstring_stridx(ctx, DUK_STRIDX_NAME);
if (!duk_get_prop_stridx(ctx, DUK__IDX_MODULE, DUK_STRIDX_NAME)) {
/* module.name for .name, default to last component if
* not present.
*/
duk_pop(ctx);
duk_dup(ctx, DUK__IDX_LASTCOMP);
}
duk_def_prop(ctx, -3, DUK_DEFPROP_HAVE_VALUE | DUK_DEFPROP_FORCE);
/*
* Call the wrapped module function.
*
* Use a protected call so that we can update Duktape.modLoaded[resolved_id]
* even if the module throws an error.
*/
/* [ requested_id require require.id resolved_id last_comp Duktape Duktape.modLoaded undefined fresh_require exports module mod_func ] */
DUK_ASSERT_TOP(ctx, DUK__IDX_MODULE + 2);
duk_dup(ctx, DUK__IDX_EXPORTS); /* exports (this binding) */
duk_dup(ctx, DUK__IDX_FRESH_REQUIRE); /* fresh require (argument) */
duk_get_prop_stridx(ctx, DUK__IDX_MODULE, DUK_STRIDX_EXPORTS); /* relookup exports from module.exports in case it was changed by modSearch */
duk_dup(ctx, DUK__IDX_MODULE); /* module (argument) */
DUK_ASSERT_TOP(ctx, DUK__IDX_MODULE + 6);
/* [ requested_id require require.id resolved_id last_comp Duktape Duktape.modLoaded undefined fresh_require exports module mod_func exports fresh_require exports module ] */
pcall_rc = duk_pcall_method(ctx, 3 /*nargs*/);
if (pcall_rc != DUK_EXEC_SUCCESS) {
/* Module loading failed. Node.js will forget the module
* registration so that another require() will try to load
* the module again. Mimic that behavior.
*/
goto delete_rethrow;
}
/* [ requested_id require require.id resolved_id last_comp Duktape Duktape.modLoaded undefined fresh_require exports module result(ignored) ] */
DUK_ASSERT_TOP(ctx, DUK__IDX_MODULE + 2);
/* fall through */
return_exports:
duk_get_prop_stridx(ctx, DUK__IDX_MODULE, DUK_STRIDX_EXPORTS);
duk_compact(ctx, -1); /* compact the exports table */
return 1; /* return module.exports */
delete_rethrow:
duk_dup(ctx, DUK__IDX_RESOLVED_ID);
duk_del_prop(ctx, DUK__IDX_MODLOADED); /* delete Duktape.modLoaded[resolved_id] */
duk_throw(ctx); /* rethrow original error */
return 0; /* not reachable */
}
#undef DUK__IDX_REQUESTED_ID
#undef DUK__IDX_REQUIRE
#undef DUK__IDX_REQUIRE_ID
#undef DUK__IDX_RESOLVED_ID
#undef DUK__IDX_LASTCOMP
#undef DUK__IDX_DUKTAPE
#undef DUK__IDX_MODLOADED
#undef DUK__IDX_UNDEFINED
#undef DUK__IDX_FRESH_REQUIRE
#undef DUK__IDX_EXPORTS
#undef DUK__IDX_MODULE
#else
DUK_INTERNAL duk_ret_t duk_bi_global_object_require(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_COMMONJS_MODULES */
#line 1 "duk_bi_json.c"
/*
* JSON built-ins.
*
* See doc/json.rst.
*
* Codepoints are handled as duk_uint_fast32_t to ensure that the full
* unsigned 32-bit range is supported. This matters to e.g. JX.
*
* Input parsing doesn't do an explicit end-of-input check at all. This is
* safe: input string data is always NUL-terminated (0x00) and valid JSON
* inputs never contain plain NUL characters, so that as long as syntax checks
* are correct, we'll never read past the NUL. This approach reduces code size
* and improves parsing performance, but it's critical that syntax checks are
* indeed correct!
*/
/* include removed: duk_internal.h */
/*
* Local defines and forward declarations.
*/
#define DUK__JSON_DECSTR_BUFSIZE 128
#define DUK__JSON_DECSTR_CHUNKSIZE 64
#define DUK__JSON_ENCSTR_CHUNKSIZE 64
#define DUK__JSON_STRINGIFY_BUFSIZE 128
#define DUK__JSON_MAX_ESC_LEN 10 /* '\Udeadbeef' */
DUK_LOCAL_DECL void duk__dec_syntax_error(duk_json_dec_ctx *js_ctx);
DUK_LOCAL_DECL void duk__dec_eat_white(duk_json_dec_ctx *js_ctx);
DUK_LOCAL_DECL duk_uint8_t duk__dec_peek(duk_json_dec_ctx *js_ctx);
DUK_LOCAL_DECL duk_uint8_t duk__dec_get(duk_json_dec_ctx *js_ctx);
DUK_LOCAL_DECL duk_uint8_t duk__dec_get_nonwhite(duk_json_dec_ctx *js_ctx);
DUK_LOCAL_DECL duk_uint_fast32_t duk__dec_decode_hex_escape(duk_json_dec_ctx *js_ctx, duk_small_uint_t n);
DUK_LOCAL_DECL void duk__dec_req_stridx(duk_json_dec_ctx *js_ctx, duk_small_uint_t stridx);
DUK_LOCAL_DECL void duk__dec_string(duk_json_dec_ctx *js_ctx);
#ifdef DUK_USE_JX
DUK_LOCAL_DECL void duk__dec_plain_string(duk_json_dec_ctx *js_ctx);
DUK_LOCAL_DECL void duk__dec_pointer(duk_json_dec_ctx *js_ctx);
DUK_LOCAL_DECL void duk__dec_buffer(duk_json_dec_ctx *js_ctx);
#endif
DUK_LOCAL_DECL void duk__dec_number(duk_json_dec_ctx *js_ctx);
DUK_LOCAL_DECL void duk__dec_objarr_entry(duk_json_dec_ctx *js_ctx);
DUK_LOCAL_DECL void duk__dec_objarr_exit(duk_json_dec_ctx *js_ctx);
DUK_LOCAL_DECL void duk__dec_object(duk_json_dec_ctx *js_ctx);
DUK_LOCAL_DECL void duk__dec_array(duk_json_dec_ctx *js_ctx);
DUK_LOCAL_DECL void duk__dec_value(duk_json_dec_ctx *js_ctx);
DUK_LOCAL_DECL void duk__dec_reviver_walk(duk_json_dec_ctx *js_ctx);
DUK_LOCAL_DECL void duk__emit_1(duk_json_enc_ctx *js_ctx, duk_uint_fast8_t ch);
DUK_LOCAL_DECL void duk__emit_2(duk_json_enc_ctx *js_ctx, duk_uint_fast8_t ch1, duk_uint_fast8_t ch2);
DUK_LOCAL_DECL void duk__unemit_1(duk_json_enc_ctx *js_ctx);
DUK_LOCAL_DECL void duk__emit_hstring(duk_json_enc_ctx *js_ctx, duk_hstring *h);
#if defined(DUK_USE_FASTINT)
DUK_LOCAL_DECL void duk__emit_cstring(duk_json_enc_ctx *js_ctx, const char *p);
#endif
DUK_LOCAL_DECL void duk__emit_stridx(duk_json_enc_ctx *js_ctx, duk_small_uint_t stridx);
DUK_LOCAL_DECL duk_uint8_t *duk__emit_esc_auto_fast(duk_json_enc_ctx *js_ctx, duk_uint_fast32_t cp, duk_uint8_t *q);
DUK_LOCAL_DECL void duk__enc_key_autoquote(duk_json_enc_ctx *js_ctx, duk_hstring *k);
DUK_LOCAL_DECL void duk__enc_quote_string(duk_json_enc_ctx *js_ctx, duk_hstring *h_str);
DUK_LOCAL_DECL void duk__enc_objarr_entry(duk_json_enc_ctx *js_ctx, duk_idx_t *entry_top);
DUK_LOCAL_DECL void duk__enc_objarr_exit(duk_json_enc_ctx *js_ctx, duk_idx_t *entry_top);
DUK_LOCAL_DECL void duk__enc_object(duk_json_enc_ctx *js_ctx);
DUK_LOCAL_DECL void duk__enc_array(duk_json_enc_ctx *js_ctx);
DUK_LOCAL_DECL duk_bool_t duk__enc_value(duk_json_enc_ctx *js_ctx, duk_idx_t idx_holder);
DUK_LOCAL_DECL duk_bool_t duk__enc_allow_into_proplist(duk_tval *tv);
DUK_LOCAL_DECL void duk__enc_double(duk_json_enc_ctx *js_ctx);
#if defined(DUK_USE_FASTINT)
DUK_LOCAL_DECL void duk__enc_fastint_tval(duk_json_enc_ctx *js_ctx, duk_tval *tv);
#endif
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
DUK_LOCAL_DECL void duk__enc_buffer(duk_json_enc_ctx *js_ctx, duk_hbuffer *h);
DUK_LOCAL_DECL void duk__enc_pointer(duk_json_enc_ctx *js_ctx, void *ptr);
DUK_LOCAL_DECL void duk__enc_bufferobject(duk_json_enc_ctx *js_ctx, duk_hbufferobject *h_bufobj);
#endif
DUK_LOCAL_DECL void duk__enc_newline_indent(duk_json_enc_ctx *js_ctx, duk_int_t depth);
/*
* Helper tables
*/
#if defined(DUK_USE_JSON_QUOTESTRING_FASTPATH)
DUK_LOCAL const duk_uint8_t duk__json_quotestr_lookup[256] = {
/* 0x00 ... 0x7f: as is
* 0x80: escape generically
* 0x81: slow path
* 0xa0 ... 0xff: backslash + one char
*/
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0xe2, 0xf4, 0xee, 0x80, 0xe6, 0xf2, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x20, 0x21, 0xa2, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b, 0xdc, 0x5d, 0x5e, 0x5f,
0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81
};
#else /* DUK_USE_JSON_QUOTESTRING_FASTPATH */
DUK_LOCAL const duk_uint8_t duk__json_quotestr_esc[14] = {
DUK_ASC_NUL, DUK_ASC_NUL, DUK_ASC_NUL, DUK_ASC_NUL,
DUK_ASC_NUL, DUK_ASC_NUL, DUK_ASC_NUL, DUK_ASC_NUL,
DUK_ASC_LC_B, DUK_ASC_LC_T, DUK_ASC_LC_N, DUK_ASC_NUL,
DUK_ASC_LC_F, DUK_ASC_LC_R
};
#endif /* DUK_USE_JSON_QUOTESTRING_FASTPATH */
#if defined(DUK_USE_JSON_DECSTRING_FASTPATH)
DUK_LOCAL const duk_uint8_t duk__json_decstr_lookup[256] = {
/* 0x00: slow path
* other: as is
*/
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x20, 0x21, 0x00, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b, 0x00, 0x5d, 0x5e, 0x5f,
0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff
};
#endif /* DUK_USE_JSON_DECSTRING_FASTPATH */
#if defined(DUK_USE_JSON_EATWHITE_FASTPATH)
DUK_LOCAL const duk_uint8_t duk__json_eatwhite_lookup[256] = {
/* 0x00: finish (non-white)
* 0x01: continue
*/
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
#endif /* DUK_USE_JSON_EATWHITE_FASTPATH */
#if defined(DUK_USE_JSON_DECNUMBER_FASTPATH)
DUK_LOCAL const duk_uint8_t duk__json_decnumber_lookup[256] = {
/* 0x00: finish (not part of number)
* 0x01: continue
*/
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x01, 0x00,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
#endif /* DUK_USE_JSON_DECNUMBER_FASTPATH */
/*
* Parsing implementation.
*
* JSON lexer is now separate from duk_lexer.c because there are numerous
* small differences making it difficult to share the lexer.
*
* The parser here works with raw bytes directly; this works because all
* JSON delimiters are ASCII characters. Invalid xUTF-8 encoded values
* inside strings will be passed on without normalization; this is not a
* compliance concern because compliant inputs will always be valid
* CESU-8 encodings.
*/
DUK_LOCAL void duk__dec_syntax_error(duk_json_dec_ctx *js_ctx) {
/* Shared handler to minimize parser size. Cause will be
* hidden, unfortunately, but we'll have an offset which
* is often quite enough.
*/
DUK_ERROR_FMT1(js_ctx->thr, DUK_ERR_SYNTAX_ERROR, DUK_STR_FMT_INVALID_JSON,
(long) (js_ctx->p - js_ctx->p_start));
}
DUK_LOCAL void duk__dec_eat_white(duk_json_dec_ctx *js_ctx) {
const duk_uint8_t *p;
duk_uint8_t t;
p = js_ctx->p;
for (;;) {
DUK_ASSERT(p <= js_ctx->p_end);
t = *p;
#if defined(DUK_USE_JSON_EATWHITE_FASTPATH)
/* This fast path is pretty marginal in practice.
* XXX: candidate for removal.
*/
DUK_ASSERT(duk__json_eatwhite_lookup[0x00] == 0x00); /* end-of-input breaks */
if (duk__json_eatwhite_lookup[t] == 0) {
break;
}
#else /* DUK_USE_JSON_EATWHITE_FASTPATH */
if (!(t == 0x20 || t == 0x0a || t == 0x0d || t == 0x09)) {
/* NUL also comes here. Comparison order matters, 0x20
* is most common whitespace.
*/
break;
}
#endif /* DUK_USE_JSON_EATWHITE_FASTPATH */
p++;
}
js_ctx->p = p;
}
DUK_LOCAL duk_uint8_t duk__dec_peek(duk_json_dec_ctx *js_ctx) {
DUK_ASSERT(js_ctx->p <= js_ctx->p_end);
return *js_ctx->p;
}
DUK_LOCAL duk_uint8_t duk__dec_get(duk_json_dec_ctx *js_ctx) {
DUK_ASSERT(js_ctx->p <= js_ctx->p_end);
return *js_ctx->p++;
}
DUK_LOCAL duk_uint8_t duk__dec_get_nonwhite(duk_json_dec_ctx *js_ctx) {
duk__dec_eat_white(js_ctx);
return duk__dec_get(js_ctx);
}
/* For JX, expressing the whole unsigned 32-bit range matters. */
DUK_LOCAL duk_uint_fast32_t duk__dec_decode_hex_escape(duk_json_dec_ctx *js_ctx, duk_small_uint_t n) {
duk_small_uint_t i;
duk_uint_fast32_t res = 0;
duk_uint8_t x;
duk_small_int_t t;
for (i = 0; i < n; i++) {
/* XXX: share helper from lexer; duk_lexer.c / hexval(). */
x = duk__dec_get(js_ctx);
DUK_DDD(DUK_DDDPRINT("decode_hex_escape: i=%ld, n=%ld, res=%ld, x=%ld",
(long) i, (long) n, (long) res, (long) x));
/* x == 0x00 (EOF) causes syntax_error */
DUK_ASSERT(duk_hex_dectab[0] == -1);
t = duk_hex_dectab[x & 0xff];
if (DUK_LIKELY(t >= 0)) {
res = (res * 16) + t;
} else {
/* catches EOF and invalid digits */
goto syntax_error;
}
}
DUK_DDD(DUK_DDDPRINT("final hex decoded value: %ld", (long) res));
return res;
syntax_error:
duk__dec_syntax_error(js_ctx);
DUK_UNREACHABLE();
return 0;
}
DUK_LOCAL void duk__dec_req_stridx(duk_json_dec_ctx *js_ctx, duk_small_uint_t stridx) {
duk_hstring *h;
const duk_uint8_t *p;
duk_uint8_t x, y;
/* First character has already been eaten and checked by the caller.
* We can scan until a NUL in stridx string because no built-in strings
* have internal NULs.
*/
DUK_ASSERT_DISABLE(stridx >= 0); /* unsigned */
DUK_ASSERT(stridx < DUK_HEAP_NUM_STRINGS);
h = DUK_HTHREAD_GET_STRING(js_ctx->thr, stridx);
DUK_ASSERT(h != NULL);
p = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h) + 1;
DUK_ASSERT(*(js_ctx->p - 1) == *(p - 1)); /* first character has been matched */
for (;;) {
x = *p;
if (x == 0) {
break;
}
y = duk__dec_get(js_ctx);
if (x != y) {
/* Catches EOF of JSON input. */
goto syntax_error;
}
p++;
}
return;
syntax_error:
duk__dec_syntax_error(js_ctx);
DUK_UNREACHABLE();
}
DUK_LOCAL duk_small_int_t duk__dec_string_escape(duk_json_dec_ctx *js_ctx, duk_uint8_t **ext_p) {
duk_uint_fast32_t cp;
/* EOF (-1) will be cast to an unsigned value first
* and then re-cast for the switch. In any case, it
* will match the default case (syntax error).
*/
cp = (duk_uint_fast32_t) duk__dec_get(js_ctx);
switch ((int) cp) {
case DUK_ASC_BACKSLASH: break;
case DUK_ASC_DOUBLEQUOTE: break;
case DUK_ASC_SLASH: break;
case DUK_ASC_LC_T: cp = 0x09; break;
case DUK_ASC_LC_N: cp = 0x0a; break;
case DUK_ASC_LC_R: cp = 0x0d; break;
case DUK_ASC_LC_F: cp = 0x0c; break;
case DUK_ASC_LC_B: cp = 0x08; break;
case DUK_ASC_LC_U: {
cp = duk__dec_decode_hex_escape(js_ctx, 4);
break;
}
#ifdef DUK_USE_JX
case DUK_ASC_UC_U: {
if (js_ctx->flag_ext_custom) {
cp = duk__dec_decode_hex_escape(js_ctx, 8);
} else {
return 1; /* syntax error */
}
break;
}
case DUK_ASC_LC_X: {
if (js_ctx->flag_ext_custom) {
cp = duk__dec_decode_hex_escape(js_ctx, 2);
} else {
return 1; /* syntax error */
}
break;
}
#endif /* DUK_USE_JX */
default:
/* catches EOF (0x00) */
return 1; /* syntax error */
}
DUK_RAW_WRITE_XUTF8(*ext_p, cp);
return 0;
}
DUK_LOCAL void duk__dec_string(duk_json_dec_ctx *js_ctx) {
duk_hthread *thr = js_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_bufwriter_ctx bw_alloc;
duk_bufwriter_ctx *bw;
duk_uint8_t *q;
/* '"' was eaten by caller */
/* Note that we currently parse -bytes-, not codepoints.
* All non-ASCII extended UTF-8 will encode to bytes >= 0x80,
* so they'll simply pass through (valid UTF-8 or not).
*/
bw = &bw_alloc;
DUK_BW_INIT_PUSHBUF(js_ctx->thr, bw, DUK__JSON_DECSTR_BUFSIZE);
q = DUK_BW_GET_PTR(js_ctx->thr, bw);
#if defined(DUK_USE_JSON_DECSTRING_FASTPATH)
for (;;) {
duk_small_uint_t safe;
duk_uint8_t b, x;
const duk_uint8_t *p;
/* Select a safe loop count where no output checks are
* needed assuming we won't encounter escapes. Input
* bound checks are not necessary as a NUL (guaranteed)
* will cause a SyntaxError before we read out of bounds.
*/
safe = DUK__JSON_DECSTR_CHUNKSIZE;
/* Ensure space for 1:1 output plus one escape. */
q = DUK_BW_ENSURE_RAW(js_ctx->thr, bw, safe + DUK_UNICODE_MAX_XUTF8_LENGTH, q);
p = js_ctx->p; /* temp copy, write back for next loop */
for (;;) {
if (safe == 0) {
js_ctx->p = p;
break;
}
safe--;
/* End of input (NUL) goes through slow path and causes SyntaxError. */
DUK_ASSERT(duk__json_decstr_lookup[0] == 0x00);
b = *p++;
x = (duk_small_int_t) duk__json_decstr_lookup[b];
if (DUK_LIKELY(x != 0)) {
/* Fast path, decode as is. */
*q++ = b;
} else if (b == DUK_ASC_DOUBLEQUOTE) {
js_ctx->p = p;
goto found_quote;
} else if (b == DUK_ASC_BACKSLASH) {
/* We've ensured space for one escaped input; then
* bail out and recheck (this makes escape handling
* quite slow but it's uncommon).
*/
js_ctx->p = p;
if (duk__dec_string_escape(js_ctx, &q) != 0) {
goto syntax_error;
}
break;
} else {
js_ctx->p = p;
goto syntax_error;
}
}
}
found_quote:
#else /* DUK_USE_JSON_DECSTRING_FASTPATH */
for (;;) {
duk_uint8_t x;
q = DUK_BW_ENSURE_RAW(js_ctx->thr, bw, DUK_UNICODE_MAX_XUTF8_LENGTH, q);
x = duk__dec_get(js_ctx);
if (x == DUK_ASC_DOUBLEQUOTE) {
break;
} else if (x == DUK_ASC_BACKSLASH) {
if (duk__dec_string_escape(js_ctx, &q) != 0) {
goto syntax_error;
}
} else if (x < 0x20) {
/* catches EOF (NUL) */
goto syntax_error;
} else {
*q++ = (duk_uint8_t) x;
}
}
#endif /* DUK_USE_JSON_DECSTRING_FASTPATH */
DUK_BW_SETPTR_AND_COMPACT(js_ctx->thr, bw, q);
duk_to_string(ctx, -1);
/* [ ... str ] */
return;
syntax_error:
duk__dec_syntax_error(js_ctx);
DUK_UNREACHABLE();
}
#ifdef DUK_USE_JX
/* Decode a plain string consisting entirely of identifier characters.
* Used to parse plain keys (e.g. "foo: 123").
*/
DUK_LOCAL void duk__dec_plain_string(duk_json_dec_ctx *js_ctx) {
duk_hthread *thr = js_ctx->thr;
duk_context *ctx = (duk_context *) thr;
const duk_uint8_t *p;
duk_small_int_t x;
/* Caller has already eaten the first char so backtrack one byte. */
js_ctx->p--; /* safe */
p = js_ctx->p;
/* Here again we parse bytes, and non-ASCII UTF-8 will cause end of
* parsing (which is correct except if there are non-shortest encodings).
* There is also no need to check explicitly for end of input buffer as
* the input is NUL padded and NUL will exit the parsing loop.
*
* Because no unescaping takes place, we can just scan to the end of the
* plain string and intern from the input buffer.
*/
for (;;) {
x = *p;
/* There is no need to check the first character specially here
* (i.e. reject digits): the caller only accepts valid initial
* characters and won't call us if the first character is a digit.
* This also ensures that the plain string won't be empty.
*/
if (!duk_unicode_is_identifier_part((duk_codepoint_t) x)) {
break;
}
p++;
}
duk_push_lstring(ctx, (const char *) js_ctx->p, (duk_size_t) (p - js_ctx->p));
js_ctx->p = p;
/* [ ... str ] */
}
#endif /* DUK_USE_JX */
#ifdef DUK_USE_JX
DUK_LOCAL void duk__dec_pointer(duk_json_dec_ctx *js_ctx) {
duk_hthread *thr = js_ctx->thr;
duk_context *ctx = (duk_context *) thr;
const duk_uint8_t *p;
duk_small_int_t x;
void *voidptr;
/* Caller has already eaten the first character ('(') which we don't need. */
p = js_ctx->p;
for (;;) {
x = *p;
/* Assume that the native representation never contains a closing
* parenthesis.
*/
if (x == DUK_ASC_RPAREN) {
break;
} else if (x <= 0) {
/* NUL term or -1 (EOF), NUL check would suffice */
goto syntax_error;
}
p++;
}
/* There is no need to NUL delimit the sscanf() call: trailing garbage is
* ignored and there is always a NUL terminator which will force an error
* if no error is encountered before it. It's possible that the scan
* would scan further than between [js_ctx->p,p[ though and we'd advance
* by less than the scanned value.
*
* Because pointers are platform specific, a failure to scan a pointer
* results in a null pointer which is a better placeholder than a missing
* value or an error.
*/
voidptr = NULL;
(void) DUK_SSCANF((const char *) js_ctx->p, DUK_STR_FMT_PTR, &voidptr);
duk_push_pointer(ctx, voidptr);
js_ctx->p = p + 1; /* skip ')' */
/* [ ... ptr ] */
return;
syntax_error:
duk__dec_syntax_error(js_ctx);
DUK_UNREACHABLE();
}
#endif /* DUK_USE_JX */
#ifdef DUK_USE_JX
DUK_LOCAL void duk__dec_buffer(duk_json_dec_ctx *js_ctx) {
duk_hthread *thr = js_ctx->thr;
duk_context *ctx = (duk_context *) thr;
const duk_uint8_t *p;
duk_uint8_t *buf;
duk_size_t src_len;
duk_small_int_t x;
/* Caller has already eaten the first character ('|') which we don't need. */
p = js_ctx->p;
/* XXX: Would be nice to share the fast path loop from duk_hex_decode()
* and avoid creating a temporary buffer. However, there are some
* differences which prevent trivial sharing:
*
* - Pipe char detection
* - EOF detection
* - Unknown length of input and output
*
* The best approach here would be a bufwriter and a reasonaly sized
* safe inner loop (e.g. 64 output bytes at a time).
*/
for (;;) {
x = *p;
/* This loop intentionally does not ensure characters are valid
* ([0-9a-fA-F]) because the hex decode call below will do that.
*/
if (x == DUK_ASC_PIPE) {
break;
} else if (x <= 0) {
/* NUL term or -1 (EOF), NUL check would suffice */
goto syntax_error;
}
p++;
}
src_len = (duk_size_t) (p - js_ctx->p);
buf = (duk_uint8_t *) duk_push_fixed_buffer(ctx, src_len);
DUK_ASSERT(buf != NULL);
DUK_MEMCPY((void *) buf, (const void *) js_ctx->p, src_len);
duk_hex_decode(ctx, -1);
js_ctx->p = p + 1; /* skip '|' */
/* [ ... buf ] */
return;
syntax_error:
duk__dec_syntax_error(js_ctx);
DUK_UNREACHABLE();
}
#endif /* DUK_USE_JX */
/* Parse a number, other than NaN or +/- Infinity */
DUK_LOCAL void duk__dec_number(duk_json_dec_ctx *js_ctx) {
duk_context *ctx = (duk_context *) js_ctx->thr;
const duk_uint8_t *p_start;
const duk_uint8_t *p;
duk_uint8_t x;
duk_small_uint_t s2n_flags;
DUK_DDD(DUK_DDDPRINT("parse_number"));
p_start = js_ctx->p;
/* First pass parse is very lenient (e.g. allows '1.2.3') and extracts a
* string for strict number parsing.
*/
p = js_ctx->p;
for (;;) {
x = *p;
DUK_DDD(DUK_DDDPRINT("parse_number: p_start=%p, p=%p, p_end=%p, x=%ld",
(const void *) p_start, (const void *) p,
(const void *) js_ctx->p_end, (long) x));
#if defined(DUK_USE_JSON_DECNUMBER_FASTPATH)
/* This fast path is pretty marginal in practice.
* XXX: candidate for removal.
*/
DUK_ASSERT(duk__json_decnumber_lookup[0x00] == 0x00); /* end-of-input breaks */
if (duk__json_decnumber_lookup[x] == 0) {
break;
}
#else /* DUK_USE_JSON_DECNUMBER_FASTPATH */
if (!((x >= DUK_ASC_0 && x <= DUK_ASC_9) ||
(x == DUK_ASC_PERIOD || x == DUK_ASC_LC_E ||
x == DUK_ASC_UC_E || x == DUK_ASC_MINUS || x == DUK_ASC_PLUS))) {
/* Plus sign must be accepted for positive exponents
* (e.g. '1.5e+2'). This clause catches NULs.
*/
break;
}
#endif /* DUK_USE_JSON_DECNUMBER_FASTPATH */
p++; /* safe, because matched (NUL causes a break) */
}
js_ctx->p = p;
DUK_ASSERT(js_ctx->p > p_start);
duk_push_lstring(ctx, (const char *) p_start, (duk_size_t) (p - p_start));
s2n_flags = DUK_S2N_FLAG_ALLOW_EXP |
DUK_S2N_FLAG_ALLOW_MINUS | /* but don't allow leading plus */
DUK_S2N_FLAG_ALLOW_FRAC;
DUK_DDD(DUK_DDDPRINT("parse_number: string before parsing: %!T",
(duk_tval *) duk_get_tval(ctx, -1)));
duk_numconv_parse(ctx, 10 /*radix*/, s2n_flags);
if (duk_is_nan(ctx, -1)) {
duk__dec_syntax_error(js_ctx);
}
DUK_ASSERT(duk_is_number(ctx, -1));
DUK_DDD(DUK_DDDPRINT("parse_number: final number: %!T",
(duk_tval *) duk_get_tval(ctx, -1)));
/* [ ... num ] */
}
DUK_LOCAL void duk__dec_objarr_entry(duk_json_dec_ctx *js_ctx) {
duk_context *ctx = (duk_context *) js_ctx->thr;
duk_require_stack(ctx, DUK_JSON_DEC_REQSTACK);
/* c recursion check */
DUK_ASSERT(js_ctx->recursion_depth >= 0);
DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit);
if (js_ctx->recursion_depth >= js_ctx->recursion_limit) {
DUK_ERROR_RANGE((duk_hthread *) ctx, DUK_STR_JSONDEC_RECLIMIT);
}
js_ctx->recursion_depth++;
}
DUK_LOCAL void duk__dec_objarr_exit(duk_json_dec_ctx *js_ctx) {
/* c recursion check */
DUK_ASSERT(js_ctx->recursion_depth > 0);
DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit);
js_ctx->recursion_depth--;
}
DUK_LOCAL void duk__dec_object(duk_json_dec_ctx *js_ctx) {
duk_context *ctx = (duk_context *) js_ctx->thr;
duk_int_t key_count; /* XXX: a "first" flag would suffice */
duk_uint8_t x;
DUK_DDD(DUK_DDDPRINT("parse_object"));
duk__dec_objarr_entry(js_ctx);
duk_push_object(ctx);
/* Initial '{' has been checked and eaten by caller. */
key_count = 0;
for (;;) {
x = duk__dec_get_nonwhite(js_ctx);
DUK_DDD(DUK_DDDPRINT("parse_object: obj=%!T, x=%ld, key_count=%ld",
(duk_tval *) duk_get_tval(ctx, -1),
(long) x, (long) key_count));
/* handle comma and closing brace */
if (x == DUK_ASC_COMMA && key_count > 0) {
/* accept comma, expect new value */
x = duk__dec_get_nonwhite(js_ctx);
} else if (x == DUK_ASC_RCURLY) {
/* eat closing brace */
break;
} else if (key_count == 0) {
/* accept anything, expect first value (EOF will be
* caught by key parsing below.
*/
;
} else {
/* catches EOF (NUL) and initial comma */
goto syntax_error;
}
/* parse key and value */
if (x == DUK_ASC_DOUBLEQUOTE) {
duk__dec_string(js_ctx);
#ifdef DUK_USE_JX
} else if (js_ctx->flag_ext_custom &&
duk_unicode_is_identifier_start((duk_codepoint_t) x)) {
duk__dec_plain_string(js_ctx);
#endif
} else {
goto syntax_error;
}
/* [ ... obj key ] */
x = duk__dec_get_nonwhite(js_ctx);
if (x != DUK_ASC_COLON) {
goto syntax_error;
}
duk__dec_value(js_ctx);
/* [ ... obj key val ] */
duk_xdef_prop_wec(ctx, -3);
/* [ ... obj ] */
key_count++;
}
/* [ ... obj ] */
DUK_DDD(DUK_DDDPRINT("parse_object: final object is %!T",
(duk_tval *) duk_get_tval(ctx, -1)));
duk__dec_objarr_exit(js_ctx);
return;
syntax_error:
duk__dec_syntax_error(js_ctx);
DUK_UNREACHABLE();
}
DUK_LOCAL void duk__dec_array(duk_json_dec_ctx *js_ctx) {
duk_context *ctx = (duk_context *) js_ctx->thr;
duk_uarridx_t arr_idx;
duk_uint8_t x;
DUK_DDD(DUK_DDDPRINT("parse_array"));
duk__dec_objarr_entry(js_ctx);
duk_push_array(ctx);
/* Initial '[' has been checked and eaten by caller. */
arr_idx = 0;
for (;;) {
x = duk__dec_get_nonwhite(js_ctx);
DUK_DDD(DUK_DDDPRINT("parse_array: arr=%!T, x=%ld, arr_idx=%ld",
(duk_tval *) duk_get_tval(ctx, -1),
(long) x, (long) arr_idx));
/* handle comma and closing bracket */
if ((x == DUK_ASC_COMMA) && (arr_idx != 0)) {
/* accept comma, expect new value */
;
} else if (x == DUK_ASC_RBRACKET) {
/* eat closing bracket */
break;
} else if (arr_idx == 0) {
/* accept anything, expect first value (EOF will be
* caught by duk__dec_value() below.
*/
js_ctx->p--; /* backtrack (safe) */
} else {
/* catches EOF (NUL) and initial comma */
goto syntax_error;
}
/* parse value */
duk__dec_value(js_ctx);
/* [ ... arr val ] */
duk_xdef_prop_index_wec(ctx, -2, arr_idx);
arr_idx++;
}
/* Must set 'length' explicitly when using duk_xdef_prop_xxx() to
* set the values.
*/
duk_set_length(ctx, -1, arr_idx);
/* [ ... arr ] */
DUK_DDD(DUK_DDDPRINT("parse_array: final array is %!T",
(duk_tval *) duk_get_tval(ctx, -1)));
duk__dec_objarr_exit(js_ctx);
return;
syntax_error:
duk__dec_syntax_error(js_ctx);
DUK_UNREACHABLE();
}
DUK_LOCAL void duk__dec_value(duk_json_dec_ctx *js_ctx) {
duk_context *ctx = (duk_context *) js_ctx->thr;
duk_uint8_t x;
x = duk__dec_get_nonwhite(js_ctx);
DUK_DDD(DUK_DDDPRINT("parse_value: initial x=%ld", (long) x));
/* Note: duk__dec_req_stridx() backtracks one char */
if (x == DUK_ASC_DOUBLEQUOTE) {
duk__dec_string(js_ctx);
} else if ((x >= DUK_ASC_0 && x <= DUK_ASC_9) || (x == DUK_ASC_MINUS)) {
#ifdef DUK_USE_JX
if (js_ctx->flag_ext_custom && x == DUK_ASC_MINUS && duk__dec_peek(js_ctx) == DUK_ASC_UC_I) {
duk__dec_req_stridx(js_ctx, DUK_STRIDX_MINUS_INFINITY); /* "-Infinity", '-' has been eaten */
duk_push_number(ctx, -DUK_DOUBLE_INFINITY);
} else {
#else
{ /* unconditional block */
#endif
/* We already ate 'x', so backup one byte. */
js_ctx->p--; /* safe */
duk__dec_number(js_ctx);
}
} else if (x == DUK_ASC_LC_T) {
duk__dec_req_stridx(js_ctx, DUK_STRIDX_TRUE);
duk_push_true(ctx);
} else if (x == DUK_ASC_LC_F) {
duk__dec_req_stridx(js_ctx, DUK_STRIDX_FALSE);
duk_push_false(ctx);
} else if (x == DUK_ASC_LC_N) {
duk__dec_req_stridx(js_ctx, DUK_STRIDX_LC_NULL);
duk_push_null(ctx);
#ifdef DUK_USE_JX
} else if (js_ctx->flag_ext_custom && x == DUK_ASC_LC_U) {
duk__dec_req_stridx(js_ctx, DUK_STRIDX_LC_UNDEFINED);
duk_push_undefined(ctx);
} else if (js_ctx->flag_ext_custom && x == DUK_ASC_UC_N) {
duk__dec_req_stridx(js_ctx, DUK_STRIDX_NAN);
duk_push_nan(ctx);
} else if (js_ctx->flag_ext_custom && x == DUK_ASC_UC_I) {
duk__dec_req_stridx(js_ctx, DUK_STRIDX_INFINITY);
duk_push_number(ctx, DUK_DOUBLE_INFINITY);
} else if (js_ctx->flag_ext_custom && x == DUK_ASC_LPAREN) {
duk__dec_pointer(js_ctx);
} else if (js_ctx->flag_ext_custom && x == DUK_ASC_PIPE) {
duk__dec_buffer(js_ctx);
#endif
} else if (x == DUK_ASC_LCURLY) {
duk__dec_object(js_ctx);
} else if (x == DUK_ASC_LBRACKET) {
duk__dec_array(js_ctx);
} else {
/* catches EOF (NUL) */
goto syntax_error;
}
duk__dec_eat_white(js_ctx);
/* [ ... val ] */
return;
syntax_error:
duk__dec_syntax_error(js_ctx);
DUK_UNREACHABLE();
}
/* Recursive value reviver, implements the Walk() algorithm. No C recursion
* check is done here because the initial parsing step will already ensure
* there is a reasonable limit on C recursion depth and hence object depth.
*/
DUK_LOCAL void duk__dec_reviver_walk(duk_json_dec_ctx *js_ctx) {
duk_context *ctx = (duk_context *) js_ctx->thr;
duk_hobject *h;
duk_uarridx_t i, arr_len;
DUK_DDD(DUK_DDDPRINT("walk: top=%ld, holder=%!T, name=%!T",
(long) duk_get_top(ctx),
(duk_tval *) duk_get_tval(ctx, -2),
(duk_tval *) duk_get_tval(ctx, -1)));
duk_dup_top(ctx);
duk_get_prop(ctx, -3); /* -> [ ... holder name val ] */
h = duk_get_hobject(ctx, -1);
if (h != NULL) {
if (DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_ARRAY) {
arr_len = (duk_uarridx_t) duk_get_length(ctx, -1);
for (i = 0; i < arr_len; i++) {
/* [ ... holder name val ] */
DUK_DDD(DUK_DDDPRINT("walk: array, top=%ld, i=%ld, arr_len=%ld, holder=%!T, name=%!T, val=%!T",
(long) duk_get_top(ctx), (long) i, (long) arr_len,
(duk_tval *) duk_get_tval(ctx, -3), (duk_tval *) duk_get_tval(ctx, -2),
(duk_tval *) duk_get_tval(ctx, -1)));
/* XXX: push_uint_string / push_u32_string */
duk_dup_top(ctx);
duk_push_uint(ctx, (duk_uint_t) i);
duk_to_string(ctx, -1); /* -> [ ... holder name val val ToString(i) ] */
duk__dec_reviver_walk(js_ctx); /* -> [ ... holder name val new_elem ] */
if (duk_is_undefined(ctx, -1)) {
duk_pop(ctx);
duk_del_prop_index(ctx, -1, i);
} else {
/* XXX: duk_xdef_prop_index_wec() would be more appropriate
* here but it currently makes some assumptions that might
* not hold (e.g. that previous property is not an accessor).
*/
duk_put_prop_index(ctx, -2, i);
}
}
} else {
/* [ ... holder name val ] */
duk_enum(ctx, -1, DUK_ENUM_OWN_PROPERTIES_ONLY /*flags*/);
while (duk_next(ctx, -1 /*enum_index*/, 0 /*get_value*/)) {
DUK_DDD(DUK_DDDPRINT("walk: object, top=%ld, holder=%!T, name=%!T, val=%!T, enum=%!iT, obj_key=%!T",
(long) duk_get_top(ctx), (duk_tval *) duk_get_tval(ctx, -5),
(duk_tval *) duk_get_tval(ctx, -4), (duk_tval *) duk_get_tval(ctx, -3),
(duk_tval *) duk_get_tval(ctx, -2), (duk_tval *) duk_get_tval(ctx, -1)));
/* [ ... holder name val enum obj_key ] */
duk_dup(ctx, -3);
duk_dup(ctx, -2);
/* [ ... holder name val enum obj_key val obj_key ] */
duk__dec_reviver_walk(js_ctx);
/* [ ... holder name val enum obj_key new_elem ] */
if (duk_is_undefined(ctx, -1)) {
duk_pop(ctx);
duk_del_prop(ctx, -3);
} else {
/* XXX: duk_xdef_prop_index_wec() would be more appropriate
* here but it currently makes some assumptions that might
* not hold (e.g. that previous property is not an accessor).
*
* Using duk_put_prop() works incorrectly with '__proto__'
* if the own property with that name has been deleted. This
* does not happen normally, but a clever reviver can trigger
* that, see complex reviver case in: test-bug-json-parse-__proto__.js.
*/
duk_put_prop(ctx, -4);
}
}
duk_pop(ctx); /* pop enum */
}
}
/* [ ... holder name val ] */
duk_dup(ctx, js_ctx->idx_reviver);
duk_insert(ctx, -4); /* -> [ ... reviver holder name val ] */
duk_call_method(ctx, 2); /* -> [ ... res ] */
DUK_DDD(DUK_DDDPRINT("walk: top=%ld, result=%!T",
(long) duk_get_top(ctx), (duk_tval *) duk_get_tval(ctx, -1)));
}
/*
* Stringify implementation.
*/
#define DUK__EMIT_1(js_ctx,ch) duk__emit_1((js_ctx), (duk_uint_fast8_t) (ch))
#define DUK__EMIT_2(js_ctx,ch1,ch2) duk__emit_2((js_ctx), (duk_uint_fast8_t) (ch1), (duk_uint_fast8_t) (ch2))
#define DUK__EMIT_HSTR(js_ctx,h) duk__emit_hstring((js_ctx), (h))
#if defined(DUK_USE_FASTINT) || defined(DUK_USE_JX) || defined(DUK_USE_JC)
#define DUK__EMIT_CSTR(js_ctx,p) duk__emit_cstring((js_ctx), (p))
#endif
#define DUK__EMIT_STRIDX(js_ctx,i) duk__emit_stridx((js_ctx), (i))
#define DUK__UNEMIT_1(js_ctx) duk__unemit_1((js_ctx))
DUK_LOCAL void duk__emit_1(duk_json_enc_ctx *js_ctx, duk_uint_fast8_t ch) {
DUK_BW_WRITE_ENSURE_U8(js_ctx->thr, &js_ctx->bw, ch);
}
DUK_LOCAL void duk__emit_2(duk_json_enc_ctx *js_ctx, duk_uint_fast8_t ch1, duk_uint_fast8_t ch2) {
DUK_BW_WRITE_ENSURE_U8_2(js_ctx->thr, &js_ctx->bw, ch1, ch2);
}
DUK_LOCAL void duk__emit_hstring(duk_json_enc_ctx *js_ctx, duk_hstring *h) {
DUK_BW_WRITE_ENSURE_HSTRING(js_ctx->thr, &js_ctx->bw, h);
}
#if defined(DUK_USE_FASTINT) || defined(DUK_USE_JX) || defined(DUK_USE_JC)
DUK_LOCAL void duk__emit_cstring(duk_json_enc_ctx *js_ctx, const char *str) {
DUK_BW_WRITE_ENSURE_CSTRING(js_ctx->thr, &js_ctx->bw, str);
}
#endif
DUK_LOCAL void duk__emit_stridx(duk_json_enc_ctx *js_ctx, duk_small_uint_t stridx) {
duk_hstring *h;
DUK_ASSERT_DISABLE(stridx >= 0); /* unsigned */
DUK_ASSERT(stridx < DUK_HEAP_NUM_STRINGS);
h = DUK_HTHREAD_GET_STRING(js_ctx->thr, stridx);
DUK_ASSERT(h != NULL);
DUK_BW_WRITE_ENSURE_HSTRING(js_ctx->thr, &js_ctx->bw, h);
}
DUK_LOCAL void duk__unemit_1(duk_json_enc_ctx *js_ctx) {
DUK_ASSERT(DUK_BW_GET_SIZE(js_ctx->thr, &js_ctx->bw) >= 1);
DUK_BW_ADD_PTR(js_ctx->thr, &js_ctx->bw, -1);
}
#define DUK__MKESC(nybbles,esc1,esc2) \
(((duk_uint_fast32_t) (nybbles)) << 16) | \
(((duk_uint_fast32_t) (esc1)) << 8) | \
((duk_uint_fast32_t) (esc2))
DUK_LOCAL duk_uint8_t *duk__emit_esc_auto_fast(duk_json_enc_ctx *js_ctx, duk_uint_fast32_t cp, duk_uint8_t *q) {
duk_uint_fast32_t tmp;
duk_small_uint_t dig;
DUK_UNREF(js_ctx);
/* Caller ensures space for at least DUK__JSON_MAX_ESC_LEN. */
/* Select appropriate escape format automatically, and set 'tmp' to a
* value encoding both the escape format character and the nybble count:
*
* (nybble_count << 16) | (escape_char1) | (escape_char2)
*/
#ifdef DUK_USE_JX
if (DUK_LIKELY(cp < 0x100UL)) {
if (DUK_UNLIKELY(js_ctx->flag_ext_custom)) {
tmp = DUK__MKESC(2, DUK_ASC_BACKSLASH, DUK_ASC_LC_X);
} else {
tmp = DUK__MKESC(4, DUK_ASC_BACKSLASH, DUK_ASC_LC_U);
}
} else
#endif
if (DUK_LIKELY(cp < 0x10000UL)) {
tmp = DUK__MKESC(4, DUK_ASC_BACKSLASH, DUK_ASC_LC_U);
} else {
#ifdef DUK_USE_JX
if (DUK_LIKELY(js_ctx->flag_ext_custom)) {
tmp = DUK__MKESC(8, DUK_ASC_BACKSLASH, DUK_ASC_UC_U);
} else
#endif
{
/* In compatible mode and standard JSON mode, output
* something useful for non-BMP characters. This won't
* roundtrip but will still be more or less readable and
* more useful than an error.
*/
tmp = DUK__MKESC(8, DUK_ASC_UC_U, DUK_ASC_PLUS);
}
}
*q++ = (duk_uint8_t) ((tmp >> 8) & 0xff);
*q++ = (duk_uint8_t) (tmp & 0xff);
tmp = tmp >> 16;
while (tmp > 0) {
tmp--;
dig = (duk_small_uint_t) ((cp >> (4 * tmp)) & 0x0f);
*q++ = duk_lc_digits[dig];
}
return q;
}
DUK_LOCAL void duk__enc_key_autoquote(duk_json_enc_ctx *js_ctx, duk_hstring *k) {
const duk_int8_t *p, *p_start, *p_end; /* Note: intentionally signed. */
duk_size_t k_len;
duk_codepoint_t cp;
DUK_ASSERT(k != NULL);
/* Accept ASCII strings which conform to identifier requirements
* as being emitted without key quotes. Since we only accept ASCII
* there's no need for actual decoding: 'p' is intentionally signed
* so that bytes >= 0x80 extend to negative values and are rejected
* as invalid identifier codepoints.
*/
if (js_ctx->flag_avoid_key_quotes) {
k_len = DUK_HSTRING_GET_BYTELEN(k);
p_start = (const duk_int8_t *) DUK_HSTRING_GET_DATA(k);
p_end = p_start + k_len;
p = p_start;
if (p == p_end) {
/* Zero length string is not accepted without quotes */
goto quote_normally;
}
cp = (duk_codepoint_t) (*p++);
if (DUK_UNLIKELY(!duk_unicode_is_identifier_start(cp))) {
goto quote_normally;
}
while (p < p_end) {
cp = (duk_codepoint_t) (*p++);
if (DUK_UNLIKELY(!duk_unicode_is_identifier_part(cp))) {
goto quote_normally;
}
}
/* This seems faster than emitting bytes one at a time and
* then potentially rewinding.
*/
DUK__EMIT_HSTR(js_ctx, k);
return;
}
quote_normally:
duk__enc_quote_string(js_ctx, k);
}
/* The Quote(value) operation: quote a string.
*
* Stack policy: [ ] -> [ ].
*/
DUK_LOCAL void duk__enc_quote_string(duk_json_enc_ctx *js_ctx, duk_hstring *h_str) {
duk_hthread *thr = js_ctx->thr;
const duk_uint8_t *p, *p_start, *p_end, *p_now, *p_tmp;
duk_uint8_t *q;
duk_ucodepoint_t cp; /* typed for duk_unicode_decode_xutf8() */
DUK_DDD(DUK_DDDPRINT("duk__enc_quote_string: h_str=%!O", (duk_heaphdr *) h_str));
DUK_ASSERT(h_str != NULL);
p_start = DUK_HSTRING_GET_DATA(h_str);
p_end = p_start + DUK_HSTRING_GET_BYTELEN(h_str);
p = p_start;
DUK__EMIT_1(js_ctx, DUK_ASC_DOUBLEQUOTE);
/* Encode string in small chunks, estimating the maximum expansion so that
* there's no need to ensure space while processing the chunk.
*/
while (p < p_end) {
duk_size_t left, now, space;
left = (duk_size_t) (p_end - p);
now = (left > DUK__JSON_ENCSTR_CHUNKSIZE ?
DUK__JSON_ENCSTR_CHUNKSIZE : left);
/* Maximum expansion per input byte is 6:
* - invalid UTF-8 byte causes "\uXXXX" to be emitted (6/1 = 6).
* - 2-byte UTF-8 encodes as "\uXXXX" (6/2 = 3).
* - 4-byte UTF-8 encodes as "\Uxxxxxxxx" (10/4 = 2.5).
*/
space = now * 6;
q = DUK_BW_ENSURE_GETPTR(thr, &js_ctx->bw, space);
p_now = p + now;
while (p < p_now) {
#if defined(DUK_USE_JSON_QUOTESTRING_FASTPATH)
duk_uint8_t b;
b = duk__json_quotestr_lookup[*p++];
if (DUK_LIKELY(b < 0x80)) {
/* Most input bytes go through here. */
*q++ = b;
} else if (b >= 0xa0) {
*q++ = DUK_ASC_BACKSLASH;
*q++ = (duk_uint8_t) (b - 0x80);
} else if (b == 0x80) {
cp = (duk_ucodepoint_t) (*(p - 1));
q = duk__emit_esc_auto_fast(js_ctx, cp, q);
} else if (b == 0x7f && js_ctx->flag_ascii_only) {
/* 0x7F is special */
DUK_ASSERT(b == 0x81);
cp = (duk_ucodepoint_t) 0x7f;
q = duk__emit_esc_auto_fast(js_ctx, cp, q);
} else {
DUK_ASSERT(b == 0x81);
p--;
/* slow path is shared */
#else /* DUK_USE_JSON_QUOTESTRING_FASTPATH */
cp = *p;
if (DUK_LIKELY(cp <= 0x7f)) {
/* ascii fast path: avoid decoding utf-8 */
p++;
if (cp == 0x22 || cp == 0x5c) {
/* double quote or backslash */
*q++ = DUK_ASC_BACKSLASH;
*q++ = (duk_uint8_t) cp;
} else if (cp < 0x20) {
duk_uint_fast8_t esc_char;
/* This approach is a bit shorter than a straight
* if-else-ladder and also a bit faster.
*/
if (cp < (sizeof(duk__json_quotestr_esc) / sizeof(duk_uint8_t)) &&
(esc_char = duk__json_quotestr_esc[cp]) != 0) {
*q++ = DUK_ASC_BACKSLASH;
*q++ = (duk_uint8_t) esc_char;
} else {
q = duk__emit_esc_auto_fast(js_ctx, cp, q);
}
} else if (cp == 0x7f && js_ctx->flag_ascii_only) {
q = duk__emit_esc_auto_fast(js_ctx, cp, q);
} else {
/* any other printable -> as is */
*q++ = (duk_uint8_t) cp;
}
} else {
/* slow path is shared */
#endif /* DUK_USE_JSON_QUOTESTRING_FASTPATH */
/* slow path decode */
/* If XUTF-8 decoding fails, treat the offending byte as a codepoint directly
* and go forward one byte. This is of course very lossy, but allows some kind
* of output to be produced even for internal strings which don't conform to
* XUTF-8. All standard Ecmascript strings are always CESU-8, so this behavior
* does not violate the Ecmascript specification. The behavior is applied to
* all modes, including Ecmascript standard JSON. Because the current XUTF-8
* decoding is not very strict, this behavior only really affects initial bytes
* and truncated codepoints.
*
* Another alternative would be to scan forwards to start of next codepoint
* (or end of input) and emit just one replacement codepoint.
*/
p_tmp = p;
if (!duk_unicode_decode_xutf8(thr, &p, p_start, p_end, &cp)) {
/* Decode failed. */
cp = *p_tmp;
p = p_tmp + 1;
}
#ifdef DUK_USE_NONSTD_JSON_ESC_U2028_U2029
if (js_ctx->flag_ascii_only || cp == 0x2028 || cp == 0x2029) {
#else
if (js_ctx->flag_ascii_only) {
#endif
q = duk__emit_esc_auto_fast(js_ctx, cp, q);
} else {
/* as is */
DUK_RAW_WRITE_XUTF8(q, cp);
}
}
}
DUK_BW_SET_PTR(thr, &js_ctx->bw, q);
}
DUK__EMIT_1(js_ctx, DUK_ASC_DOUBLEQUOTE);
}
/* Encode a double (checked by caller) from stack top. Stack top may be
* replaced by serialized string but is not popped (caller does that).
*/
DUK_LOCAL void duk__enc_double(duk_json_enc_ctx *js_ctx) {
duk_hthread *thr;
duk_context *ctx;
duk_tval *tv;
duk_double_t d;
duk_small_int_t c;
duk_small_int_t s;
duk_small_uint_t stridx;
duk_small_uint_t n2s_flags;
duk_hstring *h_str;
DUK_ASSERT(js_ctx != NULL);
thr = js_ctx->thr;
DUK_ASSERT(thr != NULL);
ctx = (duk_context *) thr;
/* Caller must ensure 'tv' is indeed a double and not a fastint! */
tv = DUK_GET_TVAL_NEGIDX(ctx, -1);
DUK_ASSERT(DUK_TVAL_IS_DOUBLE(tv));
d = DUK_TVAL_GET_DOUBLE(tv);
c = (duk_small_int_t) DUK_FPCLASSIFY(d);
s = (duk_small_int_t) DUK_SIGNBIT(d);
DUK_UNREF(s);
if (DUK_LIKELY(!(c == DUK_FP_INFINITE || c == DUK_FP_NAN))) {
DUK_ASSERT(DUK_ISFINITE(d));
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
/* Negative zero needs special handling in JX/JC because
* it would otherwise serialize to '0', not '-0'.
*/
if (DUK_UNLIKELY(c == DUK_FP_ZERO && s != 0 &&
(js_ctx->flag_ext_custom_or_compatible))) {
duk_push_hstring_stridx(ctx, DUK_STRIDX_MINUS_ZERO); /* '-0' */
} else
#endif /* DUK_USE_JX || DUK_USE_JC */
{
n2s_flags = 0;
/* [ ... number ] -> [ ... string ] */
duk_numconv_stringify(ctx, 10 /*radix*/, 0 /*digits*/, n2s_flags);
}
h_str = duk_to_hstring(ctx, -1);
DUK_ASSERT(h_str != NULL);
DUK__EMIT_HSTR(js_ctx, h_str);
return;
}
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
if (!(js_ctx->flags & (DUK_JSON_FLAG_EXT_CUSTOM |
DUK_JSON_FLAG_EXT_COMPATIBLE))) {
stridx = DUK_STRIDX_LC_NULL;
} else if (c == DUK_FP_NAN) {
stridx = js_ctx->stridx_custom_nan;
} else if (s == 0) {
stridx = js_ctx->stridx_custom_posinf;
} else {
stridx = js_ctx->stridx_custom_neginf;
}
#else
stridx = DUK_STRIDX_LC_NULL;
#endif
DUK__EMIT_STRIDX(js_ctx, stridx);
}
#if defined(DUK_USE_FASTINT)
/* Encode a fastint from duk_tval ptr, no value stack effects. */
DUK_LOCAL void duk__enc_fastint_tval(duk_json_enc_ctx *js_ctx, duk_tval *tv) {
duk_int64_t v;
/* Fastint range is signed 48-bit so longest value is -2^47 = -140737488355328
* (16 chars long), longest signed 64-bit value is -2^63 = -9223372036854775808
* (20 chars long). Alloc space for 64-bit range to be safe.
*/
duk_uint8_t buf[20 + 1];
/* Caller must ensure 'tv' is indeed a fastint! */
DUK_ASSERT(DUK_TVAL_IS_FASTINT(tv));
v = DUK_TVAL_GET_FASTINT(tv);
/* XXX: There are no format strings in duk_config.h yet, could add
* one for formatting duk_int64_t. For now, assumes "%lld" and that
* "long long" type exists. Could also rely on C99 directly but that
* won't work for older MSVC.
*/
DUK_SPRINTF((char *) buf, "%lld", (long long) v);
DUK__EMIT_CSTR(js_ctx, (const char *) buf);
}
#endif
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
#if defined(DUK_USE_HEX_FASTPATH)
DUK_LOCAL duk_uint8_t *duk__enc_buffer_data_hex(const duk_uint8_t *src, duk_size_t src_len, duk_uint8_t *dst) {
duk_uint8_t *q;
duk_uint16_t *q16;
duk_small_uint_t x;
duk_size_t i, len_safe;
#if !defined(DUK_USE_UNALIGNED_ACCESSES_POSSIBLE)
duk_bool_t shift_dst;
#endif
/* Unlike in duk_hex_encode() 'dst' is not necessarily aligned by 2.
* For platforms where unaligned accesses are not allowed, shift 'dst'
* ahead by 1 byte to get alignment and then DUK_MEMMOVE() the result
* in place. The faster encoding loop makes up the difference.
* There's always space for one extra byte because a terminator always
* follows the hex data and that's been accounted for by the caller.
*/
#if defined(DUK_USE_UNALIGNED_ACCESSES_POSSIBLE)
q16 = (duk_uint16_t *) (void *) dst;
#else
shift_dst = (duk_bool_t) (((duk_size_t) dst) & 0x01U);
if (shift_dst) {
DUK_DD(DUK_DDPRINT("unaligned accesses not possible, dst not aligned -> step to dst + 1"));
q16 = (duk_uint16_t *) (void *) (dst + 1);
} else {
DUK_DD(DUK_DDPRINT("unaligned accesses not possible, dst is aligned"));
q16 = (duk_uint16_t *) (void *) dst;
}
DUK_ASSERT((((duk_size_t) q16) & 0x01U) == 0);
#endif
len_safe = src_len & ~0x03U;
for (i = 0; i < len_safe; i += 4) {
q16[0] = duk_hex_enctab[src[i]];
q16[1] = duk_hex_enctab[src[i + 1]];
q16[2] = duk_hex_enctab[src[i + 2]];
q16[3] = duk_hex_enctab[src[i + 3]];
q16 += 4;
}
q = (duk_uint8_t *) q16;
#if !defined(DUK_USE_UNALIGNED_ACCESSES_POSSIBLE)
if (shift_dst) {
q--;
DUK_MEMMOVE((void *) dst, (const void *) (dst + 1), 2 * len_safe);
DUK_ASSERT(dst + 2 * len_safe == q);
}
#endif
for (; i < src_len; i++) {
x = src[i];
*q++ = duk_lc_digits[x >> 4];
*q++ = duk_lc_digits[x & 0x0f];
}
return q;
}
#else /* DUK_USE_HEX_FASTPATH */
DUK_LOCAL duk_uint8_t *duk__enc_buffer_data_hex(const duk_uint8_t *src, duk_size_t src_len, duk_uint8_t *dst) {
const duk_uint8_t *p;
const duk_uint8_t *p_end;
duk_uint8_t *q;
duk_small_uint_t x;
p = src;
p_end = src + src_len;
q = dst;
while (p != p_end) {
x = *p++;
*q++ = duk_lc_digits[x >> 4];
*q++ = duk_lc_digits[x & 0x0f];
}
return q;
}
#endif /* DUK_USE_HEX_FASTPATH */
DUK_LOCAL void duk__enc_buffer_data(duk_json_enc_ctx *js_ctx, duk_uint8_t *buf_data, duk_size_t buf_len) {
duk_hthread *thr;
duk_uint8_t *q;
duk_size_t space;
thr = js_ctx->thr;
DUK_ASSERT(js_ctx->flag_ext_custom || js_ctx->flag_ext_compatible); /* caller checks */
DUK_ASSERT(js_ctx->flag_ext_custom_or_compatible);
/* Buffer values are encoded in (lowercase) hex to make the
* binary data readable. Base64 or similar would be more
* compact but less readable, and the point of JX/JC
* variants is to be as useful to a programmer as possible.
*/
/* The #ifdef clutter here needs to handle the three cases:
* (1) JX+JC, (2) JX only, (3) JC only.
*/
/* Note: space must cater for both JX and JC. */
space = 9 + buf_len * 2 + 2;
DUK_ASSERT(DUK_HBUFFER_MAX_BYTELEN <= 0x7ffffffeUL);
DUK_ASSERT((space - 2) / 2 >= buf_len); /* overflow not possible, buffer limits */
q = DUK_BW_ENSURE_GETPTR(thr, &js_ctx->bw, space);
#if defined(DUK_USE_JX) && defined(DUK_USE_JC)
if (js_ctx->flag_ext_custom)
#endif
#if defined(DUK_USE_JX)
{
*q++ = DUK_ASC_PIPE;
q = duk__enc_buffer_data_hex(buf_data, buf_len, q);
*q++ = DUK_ASC_PIPE;
}
#endif
#if defined(DUK_USE_JX) && defined(DUK_USE_JC)
else
#endif
#if defined(DUK_USE_JC)
{
DUK_ASSERT(js_ctx->flag_ext_compatible);
DUK_MEMCPY((void *) q, (const void *) "{\"_buf\":\"", 9); /* len: 9 */
q += 9;
q = duk__enc_buffer_data_hex(buf_data, buf_len, q);
*q++ = DUK_ASC_DOUBLEQUOTE;
*q++ = DUK_ASC_RCURLY;
}
#endif
DUK_BW_SET_PTR(thr, &js_ctx->bw, q);
}
DUK_LOCAL void duk__enc_buffer(duk_json_enc_ctx *js_ctx, duk_hbuffer *h) {
duk__enc_buffer_data(js_ctx,
(duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(js_ctx->thr->heap, h),
(duk_size_t) DUK_HBUFFER_GET_SIZE(h));
}
#endif /* DUK_USE_JX || DUK_USE_JC */
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
DUK_LOCAL void duk__enc_pointer(duk_json_enc_ctx *js_ctx, void *ptr) {
char buf[64]; /* XXX: how to figure correct size? */
const char *fmt;
DUK_ASSERT(js_ctx->flag_ext_custom || js_ctx->flag_ext_compatible); /* caller checks */
DUK_ASSERT(js_ctx->flag_ext_custom_or_compatible);
DUK_MEMZERO(buf, sizeof(buf));
/* The #ifdef clutter here needs to handle the three cases:
* (1) JX+JC, (2) JX only, (3) JC only.
*/
#if defined(DUK_USE_JX) && defined(DUK_USE_JC)
if (js_ctx->flag_ext_custom)
#endif
#if defined(DUK_USE_JX)
{
fmt = ptr ? "(%p)" : "(null)";
}
#endif
#if defined(DUK_USE_JX) && defined(DUK_USE_JC)
else
#endif
#if defined(DUK_USE_JC)
{
DUK_ASSERT(js_ctx->flag_ext_compatible);
fmt = ptr ? "{\"_ptr\":\"%p\"}" : "{\"_ptr\":\"null\"}";
}
#endif
/* When ptr == NULL, the format argument is unused. */
DUK_SNPRINTF(buf, sizeof(buf) - 1, fmt, ptr); /* must not truncate */
DUK__EMIT_CSTR(js_ctx, buf);
}
#endif /* DUK_USE_JX || DUK_USE_JC */
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
DUK_LOCAL void duk__enc_bufferobject(duk_json_enc_ctx *js_ctx, duk_hbufferobject *h_bufobj) {
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
if (h_bufobj->buf == NULL || !DUK_HBUFFEROBJECT_VALID_SLICE(h_bufobj)) {
DUK__EMIT_STRIDX(js_ctx, DUK_STRIDX_LC_NULL);
} else {
/* Handle both full and partial slice (as long as covered). */
duk__enc_buffer_data(js_ctx,
(duk_uint8_t *) DUK_HBUFFEROBJECT_GET_SLICE_BASE(js_ctx->thr->heap, h_bufobj),
(duk_size_t) h_bufobj->length);
}
}
#endif /* DUK_USE_JX || DUK_USE_JC */
/* Indent helper. Calling code relies on js_ctx->recursion_depth also being
* directly related to indent depth.
*/
#if defined(DUK_USE_PREFER_SIZE)
DUK_LOCAL void duk__enc_newline_indent(duk_json_enc_ctx *js_ctx, duk_int_t depth) {
DUK_ASSERT(js_ctx->h_gap != NULL);
DUK_ASSERT(DUK_HSTRING_GET_BYTELEN(js_ctx->h_gap) > 0); /* caller guarantees */
DUK__EMIT_1(js_ctx, 0x0a);
while (depth-- > 0) {
DUK__EMIT_HSTR(js_ctx, js_ctx->h_gap);
}
}
#else /* DUK_USE_PREFER_SIZE */
DUK_LOCAL void duk__enc_newline_indent(duk_json_enc_ctx *js_ctx, duk_int_t depth) {
const duk_uint8_t *gap_data;
duk_size_t gap_len;
duk_size_t avail_bytes; /* bytes of indent available for copying */
duk_size_t need_bytes; /* bytes of indent still needed */
duk_uint8_t *p_start;
duk_uint8_t *p;
DUK_ASSERT(js_ctx->h_gap != NULL);
DUK_ASSERT(DUK_HSTRING_GET_BYTELEN(js_ctx->h_gap) > 0); /* caller guarantees */
DUK__EMIT_1(js_ctx, 0x0a);
if (DUK_UNLIKELY(depth == 0)) {
return;
}
/* To handle deeper indents efficiently, make use of copies we've
* already emitted. In effect we can emit a sequence of 1, 2, 4,
* 8, etc copies, and then finish the last run. Byte counters
* avoid multiply with gap_len on every loop.
*/
gap_data = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(js_ctx->h_gap);
gap_len = (duk_size_t) DUK_HSTRING_GET_BYTELEN(js_ctx->h_gap);
DUK_ASSERT(gap_len > 0);
need_bytes = gap_len * depth;
p = DUK_BW_ENSURE_GETPTR(js_ctx->thr, &js_ctx->bw, need_bytes);
p_start = p;
DUK_MEMCPY((void *) p, (const void *) gap_data, (size_t) gap_len);
p += gap_len;
avail_bytes = gap_len;
DUK_ASSERT(need_bytes >= gap_len);
need_bytes -= gap_len;
while (need_bytes >= avail_bytes) {
DUK_MEMCPY((void *) p, (const void *) p_start, (size_t) avail_bytes);
p += avail_bytes;
need_bytes -= avail_bytes;
avail_bytes <<= 1;
}
DUK_ASSERT(need_bytes < avail_bytes); /* need_bytes may be zero */
DUK_MEMCPY((void *) p, (const void *) p_start, (size_t) need_bytes);
p += need_bytes;
/*avail_bytes += need_bytes*/
DUK_BW_SET_PTR(js_ctx->thr, &js_ctx->bw, p);
}
#endif /* DUK_USE_PREFER_SIZE */
/* Shared entry handling for object/array serialization. */
DUK_LOCAL void duk__enc_objarr_entry(duk_json_enc_ctx *js_ctx, duk_idx_t *entry_top) {
duk_context *ctx = (duk_context *) js_ctx->thr;
duk_hobject *h_target;
duk_uint_fast32_t i, n;
*entry_top = duk_get_top(ctx);
duk_require_stack(ctx, DUK_JSON_ENC_REQSTACK);
/* Loop check using a hybrid approach: a fixed-size visited[] array
* with overflow in a loop check object.
*/
h_target = duk_get_hobject(ctx, -1); /* object or array */
DUK_ASSERT(h_target != NULL);
n = js_ctx->recursion_depth;
if (DUK_UNLIKELY(n > DUK_JSON_ENC_LOOPARRAY)) {
n = DUK_JSON_ENC_LOOPARRAY;
}
for (i = 0; i < n; i++) {
if (DUK_UNLIKELY(js_ctx->visiting[i] == h_target)) {
DUK_DD(DUK_DDPRINT("slow path loop detect"));
DUK_ERROR_TYPE((duk_hthread *) ctx, DUK_STR_CYCLIC_INPUT);
}
}
if (js_ctx->recursion_depth < DUK_JSON_ENC_LOOPARRAY) {
js_ctx->visiting[js_ctx->recursion_depth] = h_target;
} else {
duk_push_sprintf(ctx, DUK_STR_FMT_PTR, (void *) h_target);
duk_dup_top(ctx); /* -> [ ... voidp voidp ] */
if (duk_has_prop(ctx, js_ctx->idx_loop)) {
DUK_ERROR_TYPE((duk_hthread *) ctx, DUK_STR_CYCLIC_INPUT);
}
duk_push_true(ctx); /* -> [ ... voidp true ] */
duk_put_prop(ctx, js_ctx->idx_loop); /* -> [ ... ] */
}
/* C recursion check. */
DUK_ASSERT(js_ctx->recursion_depth >= 0);
DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit);
if (js_ctx->recursion_depth >= js_ctx->recursion_limit) {
DUK_ERROR_RANGE((duk_hthread *) ctx, DUK_STR_JSONENC_RECLIMIT);
}
js_ctx->recursion_depth++;
DUK_DDD(DUK_DDDPRINT("shared entry finished: top=%ld, loop=%!T",
(long) duk_get_top(ctx), (duk_tval *) duk_get_tval(ctx, js_ctx->idx_loop)));
}
/* Shared exit handling for object/array serialization. */
DUK_LOCAL void duk__enc_objarr_exit(duk_json_enc_ctx *js_ctx, duk_idx_t *entry_top) {
duk_context *ctx = (duk_context *) js_ctx->thr;
duk_hobject *h_target;
/* C recursion check. */
DUK_ASSERT(js_ctx->recursion_depth > 0);
DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit);
js_ctx->recursion_depth--;
/* Loop check. */
h_target = duk_get_hobject(ctx, *entry_top - 1); /* original target at entry_top - 1 */
DUK_ASSERT(h_target != NULL);
if (js_ctx->recursion_depth < DUK_JSON_ENC_LOOPARRAY) {
/* Previous entry was inside visited[], nothing to do. */
} else {
duk_push_sprintf(ctx, DUK_STR_FMT_PTR, (void *) h_target);
duk_del_prop(ctx, js_ctx->idx_loop); /* -> [ ... ] */
}
/* Restore stack top after unbalanced code paths. */
duk_set_top(ctx, *entry_top);
DUK_DDD(DUK_DDDPRINT("shared entry finished: top=%ld, loop=%!T",
(long) duk_get_top(ctx), (duk_tval *) duk_get_tval(ctx, js_ctx->idx_loop)));
}
/* The JO(value) operation: encode object.
*
* Stack policy: [ object ] -> [ object ].
*/
DUK_LOCAL void duk__enc_object(duk_json_enc_ctx *js_ctx) {
duk_context *ctx = (duk_context *) js_ctx->thr;
duk_hstring *h_key;
duk_idx_t entry_top;
duk_idx_t idx_obj;
duk_idx_t idx_keys;
duk_bool_t emitted;
duk_uarridx_t arr_len, i;
duk_size_t prev_size;
DUK_DDD(DUK_DDDPRINT("duk__enc_object: obj=%!T", (duk_tval *) duk_get_tval(ctx, -1)));
duk__enc_objarr_entry(js_ctx, &entry_top);
idx_obj = entry_top - 1;
if (js_ctx->idx_proplist >= 0) {
idx_keys = js_ctx->idx_proplist;
} else {
/* XXX: would be nice to enumerate an object at specified index */
duk_dup(ctx, idx_obj);
(void) duk_hobject_get_enumerated_keys(ctx, DUK_ENUM_OWN_PROPERTIES_ONLY /*flags*/); /* [ ... target ] -> [ ... target keys ] */
idx_keys = duk_require_normalize_index(ctx, -1);
/* leave stack unbalanced on purpose */
}
DUK_DDD(DUK_DDDPRINT("idx_keys=%ld, h_keys=%!T",
(long) idx_keys, (duk_tval *) duk_get_tval(ctx, idx_keys)));
/* Steps 8-10 have been merged to avoid a "partial" variable. */
DUK__EMIT_1(js_ctx, DUK_ASC_LCURLY);
/* XXX: keys is an internal object with all keys to be processed
* in its (gapless) array part. Because nobody can touch the keys
* object, we could iterate its array part directly (keeping in mind
* that it can be reallocated).
*/
arr_len = (duk_uarridx_t) duk_get_length(ctx, idx_keys);
emitted = 0;
for (i = 0; i < arr_len; i++) {
duk_get_prop_index(ctx, idx_keys, i); /* -> [ ... key ] */
DUK_DDD(DUK_DDDPRINT("object property loop: holder=%!T, key=%!T",
(duk_tval *) duk_get_tval(ctx, idx_obj),
(duk_tval *) duk_get_tval(ctx, -1)));
h_key = duk_get_hstring(ctx, -1);
DUK_ASSERT(h_key != NULL);
prev_size = DUK_BW_GET_SIZE(js_ctx->thr, &js_ctx->bw);
if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) {
duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth);
duk__enc_key_autoquote(js_ctx, h_key);
DUK__EMIT_2(js_ctx, DUK_ASC_COLON, DUK_ASC_SPACE);
} else {
duk__enc_key_autoquote(js_ctx, h_key);
DUK__EMIT_1(js_ctx, DUK_ASC_COLON);
}
/* [ ... key ] */
if (DUK_UNLIKELY(duk__enc_value(js_ctx, idx_obj) == 0)) {
/* Value would yield 'undefined', so skip key altogether.
* Side effects have already happened.
*/
DUK_BW_SET_SIZE(js_ctx->thr, &js_ctx->bw, prev_size);
} else {
DUK__EMIT_1(js_ctx, DUK_ASC_COMMA);
emitted = 1;
}
/* [ ... ] */
}
if (emitted) {
DUK_ASSERT(*((duk_uint8_t *) DUK_BW_GET_PTR(js_ctx->thr, &js_ctx->bw) - 1) == DUK_ASC_COMMA);
DUK__UNEMIT_1(js_ctx); /* eat trailing comma */
if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) {
DUK_ASSERT(js_ctx->recursion_depth >= 1);
duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth - 1);
}
}
DUK__EMIT_1(js_ctx, DUK_ASC_RCURLY);
duk__enc_objarr_exit(js_ctx, &entry_top);
DUK_ASSERT_TOP(ctx, entry_top);
}
/* The JA(value) operation: encode array.
*
* Stack policy: [ array ] -> [ array ].
*/
DUK_LOCAL void duk__enc_array(duk_json_enc_ctx *js_ctx) {
duk_context *ctx = (duk_context *) js_ctx->thr;
duk_idx_t entry_top;
duk_idx_t idx_arr;
duk_bool_t emitted;
duk_uarridx_t i, arr_len;
DUK_DDD(DUK_DDDPRINT("duk__enc_array: array=%!T",
(duk_tval *) duk_get_tval(ctx, -1)));
duk__enc_objarr_entry(js_ctx, &entry_top);
idx_arr = entry_top - 1;
/* Steps 8-10 have been merged to avoid a "partial" variable. */
DUK__EMIT_1(js_ctx, DUK_ASC_LBRACKET);
arr_len = (duk_uarridx_t) duk_get_length(ctx, idx_arr);
emitted = 0;
for (i = 0; i < arr_len; i++) {
DUK_DDD(DUK_DDDPRINT("array entry loop: array=%!T, index=%ld, arr_len=%ld",
(duk_tval *) duk_get_tval(ctx, idx_arr),
(long) i, (long) arr_len));
if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) {
DUK_ASSERT(js_ctx->recursion_depth >= 1);
duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth);
}
/* XXX: duk_push_uint_string() */
duk_push_uint(ctx, (duk_uint_t) i);
duk_to_string(ctx, -1); /* -> [ ... key ] */
/* [ ... key ] */
if (DUK_UNLIKELY(duk__enc_value(js_ctx, idx_arr) == 0)) {
/* Value would normally be omitted, replace with 'null'. */
DUK__EMIT_STRIDX(js_ctx, DUK_STRIDX_LC_NULL);
} else {
;
}
/* [ ... ] */
DUK__EMIT_1(js_ctx, DUK_ASC_COMMA);
emitted = 1;
}
if (emitted) {
DUK_ASSERT(*((duk_uint8_t *) DUK_BW_GET_PTR(js_ctx->thr, &js_ctx->bw) - 1) == DUK_ASC_COMMA);
DUK__UNEMIT_1(js_ctx); /* eat trailing comma */
if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) {
DUK_ASSERT(js_ctx->recursion_depth >= 1);
duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth - 1);
}
}
DUK__EMIT_1(js_ctx, DUK_ASC_RBRACKET);
duk__enc_objarr_exit(js_ctx, &entry_top);
DUK_ASSERT_TOP(ctx, entry_top);
}
/* The Str(key, holder) operation.
*
* Stack policy: [ ... key ] -> [ ... ]
*/
DUK_LOCAL duk_bool_t duk__enc_value(duk_json_enc_ctx *js_ctx, duk_idx_t idx_holder) {
duk_context *ctx = (duk_context *) js_ctx->thr;
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h_tmp;
duk_tval *tv;
duk_tval *tv_holder;
duk_tval *tv_key;
duk_small_int_t c;
DUK_DDD(DUK_DDDPRINT("duk__enc_value: idx_holder=%ld, holder=%!T, key=%!T",
(long) idx_holder, (duk_tval *) duk_get_tval(ctx, idx_holder),
(duk_tval *) duk_get_tval(ctx, -1)));
DUK_UNREF(thr);
tv_holder = DUK_GET_TVAL_POSIDX(ctx, idx_holder);
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv_holder));
tv_key = DUK_GET_TVAL_NEGIDX(ctx, -1);
DUK_ASSERT(DUK_TVAL_IS_STRING(tv_key));
(void) duk_hobject_getprop(thr, tv_holder, tv_key);
/* -> [ ... key val ] */
DUK_DDD(DUK_DDDPRINT("value=%!T", (duk_tval *) duk_get_tval(ctx, -1)));
h_tmp = duk_get_hobject_or_lfunc_coerce(ctx, -1);
if (h_tmp != NULL) {
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_TO_JSON);
h_tmp = duk_get_hobject_or_lfunc_coerce(ctx, -1); /* toJSON() can also be a lightfunc */
if (h_tmp != NULL && DUK_HOBJECT_IS_CALLABLE(h_tmp)) {
DUK_DDD(DUK_DDDPRINT("value is object, has callable toJSON() -> call it"));
/* XXX: duk_dup_unvalidated(ctx, -2) etc. */
duk_dup(ctx, -2); /* -> [ ... key val toJSON val ] */
duk_dup(ctx, -4); /* -> [ ... key val toJSON val key ] */
duk_call_method(ctx, 1); /* -> [ ... key val val' ] */
duk_remove(ctx, -2); /* -> [ ... key val' ] */
} else {
duk_pop(ctx); /* -> [ ... key val ] */
}
}
/* [ ... key val ] */
DUK_DDD(DUK_DDDPRINT("value=%!T", (duk_tval *) duk_get_tval(ctx, -1)));
if (js_ctx->h_replacer) {
/* XXX: Here a "slice copy" would be useful. */
DUK_DDD(DUK_DDDPRINT("replacer is set, call replacer"));
duk_push_hobject(ctx, js_ctx->h_replacer); /* -> [ ... key val replacer ] */
duk_dup(ctx, idx_holder); /* -> [ ... key val replacer holder ] */
duk_dup(ctx, -4); /* -> [ ... key val replacer holder key ] */
duk_dup(ctx, -4); /* -> [ ... key val replacer holder key val ] */
duk_call_method(ctx, 2); /* -> [ ... key val val' ] */
duk_remove(ctx, -2); /* -> [ ... key val' ] */
}
/* [ ... key val ] */
DUK_DDD(DUK_DDDPRINT("value=%!T", (duk_tval *) duk_get_tval(ctx, -1)));
tv = DUK_GET_TVAL_NEGIDX(ctx, -1);
if (DUK_TVAL_IS_OBJECT(tv)) {
duk_hobject *h;
h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
if (DUK_HOBJECT_IS_BUFFEROBJECT(h)) {
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
duk_hbufferobject *h_bufobj;
h_bufobj = (duk_hbufferobject *) h;
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
/* Conceptually we'd extract the plain underlying buffer
* or its slice and then do a type mask check below to
* see if we should reject it. Do the mask check here
* instead to avoid making a copy of the buffer slice.
*/
if (js_ctx->mask_for_undefined & DUK_TYPE_MASK_BUFFER) {
DUK_DDD(DUK_DDDPRINT("-> bufferobject (-> plain buffer) will result in undefined (type mask check)"));
goto pop2_undef;
}
DUK_DDD(DUK_DDDPRINT("-> bufferobject won't result in undefined, encode directly"));
duk__enc_bufferobject(js_ctx, h_bufobj);
goto pop2_emitted;
#else
DUK_DDD(DUK_DDDPRINT("no JX/JC support, bufferobject/buffer will always result in undefined"));
goto pop2_undef;
#endif
} else {
c = (duk_small_int_t) DUK_HOBJECT_GET_CLASS_NUMBER(h);
switch ((int) c) {
case DUK_HOBJECT_CLASS_NUMBER: {
DUK_DDD(DUK_DDDPRINT("value is a Number object -> coerce with ToNumber()"));
duk_to_number(ctx, -1);
/* The coercion potentially invokes user .valueOf() and .toString()
* but can't result in a function value because [[DefaultValue]] would
* reject such a result: test-dev-json-stringify-coercion-1.js.
*/
DUK_ASSERT(!duk_is_callable(ctx, -1));
break;
}
case DUK_HOBJECT_CLASS_STRING: {
DUK_DDD(DUK_DDDPRINT("value is a String object -> coerce with ToString()"));
duk_to_string(ctx, -1);
/* Same coercion behavior as for Number. */
DUK_ASSERT(!duk_is_callable(ctx, -1));
break;
}
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
case DUK_HOBJECT_CLASS_POINTER:
#endif
case DUK_HOBJECT_CLASS_BOOLEAN: {
DUK_DDD(DUK_DDDPRINT("value is a Boolean/Buffer/Pointer object -> get internal value"));
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_VALUE);
duk_remove(ctx, -2);
break;
}
default: {
/* Normal object which doesn't get automatically coerced to a
* primitive value. Functions are checked for specially. The
* primitive value coercions for Number, String, Pointer, and
* Boolean can't result in functions so suffices to check here.
*/
DUK_ASSERT(h != NULL);
if (DUK_HOBJECT_IS_CALLABLE(h)) {
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
if (js_ctx->flags & (DUK_JSON_FLAG_EXT_CUSTOM |
DUK_JSON_FLAG_EXT_COMPATIBLE)) {
/* We only get here when doing non-standard JSON encoding */
DUK_DDD(DUK_DDDPRINT("-> function allowed, serialize to custom format"));
DUK_ASSERT(js_ctx->flag_ext_custom || js_ctx->flag_ext_compatible);
DUK__EMIT_STRIDX(js_ctx, js_ctx->stridx_custom_function);
goto pop2_emitted;
} else {
DUK_DDD(DUK_DDDPRINT("-> will result in undefined (function)"));
goto pop2_undef;
}
#else /* DUK_USE_JX || DUK_USE_JC */
DUK_DDD(DUK_DDDPRINT("-> will result in undefined (function)"));
goto pop2_undef;
#endif /* DUK_USE_JX || DUK_USE_JC */
}
}
} /* end switch */
}
}
/* [ ... key val ] */
DUK_DDD(DUK_DDDPRINT("value=%!T", (duk_tval *) duk_get_tval(ctx, -1)));
if (duk_check_type_mask(ctx, -1, js_ctx->mask_for_undefined)) {
/* will result in undefined */
DUK_DDD(DUK_DDDPRINT("-> will result in undefined (type mask check)"));
goto pop2_undef;
}
tv = DUK_GET_TVAL_NEGIDX(ctx, -1);
switch (DUK_TVAL_GET_TAG(tv)) {
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
/* When JX/JC not in use, the type mask above will avoid this case if needed. */
case DUK_TAG_UNDEFINED: {
DUK__EMIT_STRIDX(js_ctx, js_ctx->stridx_custom_undefined);
break;
}
#endif
case DUK_TAG_NULL: {
DUK__EMIT_STRIDX(js_ctx, DUK_STRIDX_LC_NULL);
break;
}
case DUK_TAG_BOOLEAN: {
DUK__EMIT_STRIDX(js_ctx, DUK_TVAL_GET_BOOLEAN(tv) ?
DUK_STRIDX_TRUE : DUK_STRIDX_FALSE);
break;
}
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
/* When JX/JC not in use, the type mask above will avoid this case if needed. */
case DUK_TAG_POINTER: {
duk__enc_pointer(js_ctx, DUK_TVAL_GET_POINTER(tv));
break;
}
#endif /* DUK_USE_JX || DUK_USE_JC */
case DUK_TAG_STRING: {
duk_hstring *h = DUK_TVAL_GET_STRING(tv);
DUK_ASSERT(h != NULL);
duk__enc_quote_string(js_ctx, h);
break;
}
case DUK_TAG_OBJECT: {
duk_hobject *h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
/* Function values are handled completely above (including
* coercion results):
*/
DUK_ASSERT(!DUK_HOBJECT_IS_CALLABLE(h));
if (DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_ARRAY) {
duk__enc_array(js_ctx);
} else {
duk__enc_object(js_ctx);
}
break;
}
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
/* When JX/JC not in use, the type mask above will avoid this case if needed. */
case DUK_TAG_BUFFER: {
duk__enc_buffer(js_ctx, DUK_TVAL_GET_BUFFER(tv));
break;
}
#endif /* DUK_USE_JX || DUK_USE_JC */
case DUK_TAG_LIGHTFUNC: {
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
/* We only get here when doing non-standard JSON encoding */
DUK_ASSERT(js_ctx->flag_ext_custom || js_ctx->flag_ext_compatible);
DUK__EMIT_STRIDX(js_ctx, js_ctx->stridx_custom_function);
#else
/* Standard JSON omits functions */
DUK_UNREACHABLE();
#endif
break;
}
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT:
/* Number serialization has a significant impact relative to
* other fast path code, so careful fast path for fastints.
*/
duk__enc_fastint_tval(js_ctx, tv);
break;
#endif
default: {
/* number */
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
/* XXX: A fast path for usual integers would be useful when
* fastint support is not enabled.
*/
duk__enc_double(js_ctx);
break;
}
}
pop2_emitted:
duk_pop_2(ctx); /* [ ... key val ] -> [ ... ] */
return 1; /* emitted */
pop2_undef:
duk_pop_2(ctx); /* [ ... key val ] -> [ ... ] */
return 0; /* not emitted */
}
/* E5 Section 15.12.3, main algorithm, step 4.b.ii steps 1-4. */
DUK_LOCAL duk_bool_t duk__enc_allow_into_proplist(duk_tval *tv) {
duk_hobject *h;
duk_small_int_t c;
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_STRING(tv) || DUK_TVAL_IS_NUMBER(tv)) {
return 1;
} else if (DUK_TVAL_IS_OBJECT(tv)) {
h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
c = (duk_small_int_t) DUK_HOBJECT_GET_CLASS_NUMBER(h);
if (c == DUK_HOBJECT_CLASS_STRING || c == DUK_HOBJECT_CLASS_NUMBER) {
return 1;
}
}
return 0;
}
/*
* JSON.stringify() fast path
*
* Otherwise supports full JSON, JX, and JC features, but bails out on any
* possible side effect which might change the value being serialized. The
* fast path can take advantage of the fact that the value being serialized
* is unchanged so that we can walk directly through property tables etc.
*/
#if defined(DUK_USE_JSON_STRINGIFY_FASTPATH)
DUK_LOCAL duk_bool_t duk__json_stringify_fast_value(duk_json_enc_ctx *js_ctx, duk_tval *tv) {
duk_uint_fast32_t i, n;
DUK_DDD(DUK_DDDPRINT("stringify fast: %!T", tv));
DUK_ASSERT(js_ctx != NULL);
DUK_ASSERT(js_ctx->thr != NULL);
#if 0 /* disabled for now */
restart_match:
#endif
DUK_ASSERT(tv != NULL);
switch (DUK_TVAL_GET_TAG(tv)) {
case DUK_TAG_UNDEFINED: {
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
if (js_ctx->flag_ext_custom || js_ctx->flag_ext_compatible) {
DUK__EMIT_STRIDX(js_ctx, js_ctx->stridx_custom_undefined);
break;
} else {
goto emit_undefined;
}
#else
goto emit_undefined;
#endif
}
case DUK_TAG_NULL: {
DUK__EMIT_STRIDX(js_ctx, DUK_STRIDX_LC_NULL);
break;
}
case DUK_TAG_BOOLEAN: {
DUK__EMIT_STRIDX(js_ctx, DUK_TVAL_GET_BOOLEAN(tv) ?
DUK_STRIDX_TRUE : DUK_STRIDX_FALSE);
break;
}
case DUK_TAG_STRING: {
duk_hstring *h;
h = DUK_TVAL_GET_STRING(tv);
DUK_ASSERT(h != NULL);
duk__enc_quote_string(js_ctx, h);
break;
}
case DUK_TAG_OBJECT: {
duk_hobject *obj;
duk_tval *tv_val;
duk_bool_t emitted = 0;
duk_uint32_t c_bit, c_all, c_array, c_unbox, c_undef,
c_func, c_bufobj, c_object;
/* For objects JSON.stringify() only looks for own, enumerable
* properties which is nice for the fast path here.
*
* For arrays JSON.stringify() uses [[Get]] so it will actually
* inherit properties during serialization! This fast path
* supports gappy arrays as long as there's no actual inherited
* property (which might be a getter etc).
*
* Since recursion only happens for objects, we can have both
* recursion and loop checks here. We use a simple, depth-limited
* loop check in the fast path because the object-based tracking
* is very slow (when tested, it accounted for 50% of fast path
* execution time for input data with a lot of small objects!).
*/
/* XXX: for real world code, could just ignore array inheritance
* and only look at array own properties.
*/
/* We rely on a few object flag / class number relationships here,
* assert for them.
*/
obj = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(obj != NULL);
DUK_ASSERT_HOBJECT_VALID(obj);
/* Once recursion depth is increased, exit path must decrease
* it (though it's OK to abort the fast path).
*/
DUK_ASSERT(js_ctx->recursion_depth >= 0);
DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit);
if (js_ctx->recursion_depth >= js_ctx->recursion_limit) {
DUK_DD(DUK_DDPRINT("fast path recursion limit"));
DUK_ERROR_RANGE(js_ctx->thr, DUK_STR_JSONDEC_RECLIMIT);
}
for (i = 0, n = (duk_uint_fast32_t) js_ctx->recursion_depth; i < n; i++) {
if (DUK_UNLIKELY(js_ctx->visiting[i] == obj)) {
DUK_DD(DUK_DDPRINT("fast path loop detect"));
DUK_ERROR_TYPE(js_ctx->thr, DUK_STR_CYCLIC_INPUT);
}
}
/* Guaranteed by recursion_limit setup so we don't have to
* check twice.
*/
DUK_ASSERT(js_ctx->recursion_depth < DUK_JSON_ENC_LOOPARRAY);
js_ctx->visiting[js_ctx->recursion_depth] = obj;
js_ctx->recursion_depth++;
/* If object has a .toJSON() property, we can't be certain
* that it wouldn't mutate any value arbitrarily, so bail
* out of the fast path.
*
* If an object is a Proxy we also can't avoid side effects
* so abandon.
*/
/* XXX: non-callable .toJSON() doesn't need to cause an abort
* but does at the moment, probably not worth fixing.
*/
if (duk_hobject_hasprop_raw(js_ctx->thr, obj, DUK_HTHREAD_STRING_TO_JSON(js_ctx->thr)) ||
DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(obj)) {
DUK_DD(DUK_DDPRINT("object has a .toJSON property or object is a Proxy, abort fast path"));
goto abort_fastpath;
}
/* We could use a switch-case for the class number but it turns out
* a small if-else ladder on class masks is better. The if-ladder
* should be in order of relevancy.
*/
/* XXX: move masks to js_ctx? they don't change during one
* fast path invocation.
*/
DUK_ASSERT(DUK_HOBJECT_CLASS_MAX <= 31);
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
if (js_ctx->flag_ext_custom_or_compatible) {
c_all = DUK_HOBJECT_CMASK_ALL;
c_array = DUK_HOBJECT_CMASK_ARRAY;
c_unbox = DUK_HOBJECT_CMASK_NUMBER |
DUK_HOBJECT_CMASK_STRING |
DUK_HOBJECT_CMASK_BOOLEAN |
DUK_HOBJECT_CMASK_POINTER;
c_func = DUK_HOBJECT_CMASK_FUNCTION;
c_bufobj = DUK_HOBJECT_CMASK_ALL_BUFFEROBJECTS;
c_undef = 0;
c_object = c_all & ~(c_array | c_unbox | c_func | c_bufobj | c_undef);
}
else
#endif
{
c_all = DUK_HOBJECT_CMASK_ALL;
c_array = DUK_HOBJECT_CMASK_ARRAY;
c_unbox = DUK_HOBJECT_CMASK_NUMBER |
DUK_HOBJECT_CMASK_STRING |
DUK_HOBJECT_CMASK_BOOLEAN;
c_func = 0;
c_bufobj = 0;
c_undef = DUK_HOBJECT_CMASK_FUNCTION |
DUK_HOBJECT_CMASK_POINTER |
DUK_HOBJECT_CMASK_ALL_BUFFEROBJECTS;
c_object = c_all & ~(c_array | c_unbox | c_func | c_bufobj | c_undef);
}
c_bit = DUK_HOBJECT_GET_CLASS_MASK(obj);
if (c_bit & c_object) {
/* All other object types. */
DUK__EMIT_1(js_ctx, DUK_ASC_LCURLY);
/* A non-Array object should not have an array part in practice.
* But since it is supported internally (and perhaps used at some
* point), check and abandon if that's the case.
*/
if (DUK_HOBJECT_HAS_ARRAY_PART(obj)) {
DUK_DD(DUK_DDPRINT("non-Array object has array part, abort fast path"));
goto abort_fastpath;
}
for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(obj); i++) {
duk_hstring *k;
duk_size_t prev_size;
k = DUK_HOBJECT_E_GET_KEY(js_ctx->thr->heap, obj, i);
if (!k) {
continue;
}
if (!DUK_HOBJECT_E_SLOT_IS_ENUMERABLE(js_ctx->thr->heap, obj, i)) {
continue;
}
if (DUK_HOBJECT_E_SLOT_IS_ACCESSOR(js_ctx->thr->heap, obj, i)) {
/* Getter might have arbitrary side effects,
* so bail out.
*/
DUK_DD(DUK_DDPRINT("property is an accessor, abort fast path"));
goto abort_fastpath;
}
if (DUK_HSTRING_HAS_INTERNAL(k)) {
continue;
}
tv_val = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(js_ctx->thr->heap, obj, i);
prev_size = DUK_BW_GET_SIZE(js_ctx->thr, &js_ctx->bw);
if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) {
duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth);
duk__enc_key_autoquote(js_ctx, k);
DUK__EMIT_2(js_ctx, DUK_ASC_COLON, DUK_ASC_SPACE);
} else {
duk__enc_key_autoquote(js_ctx, k);
DUK__EMIT_1(js_ctx, DUK_ASC_COLON);
}
if (duk__json_stringify_fast_value(js_ctx, tv_val) == 0) {
DUK_DD(DUK_DDPRINT("prop value not supported, rewind key and colon"));
DUK_BW_SET_SIZE(js_ctx->thr, &js_ctx->bw, prev_size);
} else {
DUK__EMIT_1(js_ctx, DUK_ASC_COMMA);
emitted = 1;
}
}
/* If any non-Array value had enumerable virtual own
* properties, they should be serialized here. Standard
* types don't.
*/
if (emitted) {
DUK_ASSERT(*((duk_uint8_t *) DUK_BW_GET_PTR(js_ctx->thr, &js_ctx->bw) - 1) == DUK_ASC_COMMA);
DUK__UNEMIT_1(js_ctx); /* eat trailing comma */
if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) {
DUK_ASSERT(js_ctx->recursion_depth >= 1);
duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth - 1);
}
}
DUK__EMIT_1(js_ctx, DUK_ASC_RCURLY);
} else if (c_bit & c_array) {
duk_uint_fast32_t arr_len;
duk_uint_fast32_t asize;
DUK__EMIT_1(js_ctx, DUK_ASC_LBRACKET);
/* Assume arrays are dense in the fast path. */
if (!DUK_HOBJECT_HAS_ARRAY_PART(obj)) {
DUK_DD(DUK_DDPRINT("Array object is sparse, abort fast path"));
goto abort_fastpath;
}
arr_len = (duk_uint_fast32_t) duk_hobject_get_length(js_ctx->thr, obj);
asize = (duk_uint_fast32_t) DUK_HOBJECT_GET_ASIZE(obj);
if (arr_len > asize) {
/* Array length is larger than 'asize'. This shouldn't
* happen in practice. Bail out just in case.
*/
DUK_DD(DUK_DDPRINT("arr_len > asize, abort fast path"));
goto abort_fastpath;
}
/* Array part may be larger than 'length'; if so, iterate
* only up to array 'length'.
*/
for (i = 0; i < arr_len; i++) {
DUK_ASSERT(i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ASIZE(obj));
tv_val = DUK_HOBJECT_A_GET_VALUE_PTR(js_ctx->thr->heap, obj, i);
if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) {
duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth);
}
if (DUK_UNLIKELY(DUK_TVAL_IS_UNUSED(tv_val))) {
/* Gap in array; check for inherited property,
* bail out if one exists. This should be enough
* to support gappy arrays for all practical code.
*/
duk_hstring *h_tmp;
duk_bool_t has_inherited;
/* XXX: refactor into an internal helper, pretty awkward */
duk_push_uint((duk_context *) js_ctx->thr, (duk_uint_t) i);
h_tmp = duk_to_hstring((duk_context *) js_ctx->thr, -1);
DUK_ASSERT(h_tmp != NULL);
has_inherited = duk_hobject_hasprop_raw(js_ctx->thr, obj, h_tmp);
duk_pop((duk_context *) js_ctx->thr);
if (has_inherited) {
DUK_D(DUK_DPRINT("gap in array, conflicting inherited property, abort fast path"));
goto abort_fastpath;
}
/* Ordinary gap, undefined encodes to 'null' in
* standard JSON (and no JX/JC support here now).
*/
DUK_D(DUK_DPRINT("gap in array, no conflicting inherited property, remain on fast path"));
DUK__EMIT_STRIDX(js_ctx, DUK_STRIDX_LC_NULL);
} else {
if (duk__json_stringify_fast_value(js_ctx, tv_val) == 0) {
DUK__EMIT_STRIDX(js_ctx, DUK_STRIDX_LC_NULL);
}
}
DUK__EMIT_1(js_ctx, DUK_ASC_COMMA);
emitted = 1;
}
if (emitted) {
DUK_ASSERT(*((duk_uint8_t *) DUK_BW_GET_PTR(js_ctx->thr, &js_ctx->bw) - 1) == DUK_ASC_COMMA);
DUK__UNEMIT_1(js_ctx); /* eat trailing comma */
if (DUK_UNLIKELY(js_ctx->h_gap != NULL)) {
DUK_ASSERT(js_ctx->recursion_depth >= 1);
duk__enc_newline_indent(js_ctx, js_ctx->recursion_depth - 1);
}
}
DUK__EMIT_1(js_ctx, DUK_ASC_RBRACKET);
} else if (c_bit & c_unbox) {
/* Certain boxed types are required to go through
* automatic unboxing. Rely on internal value being
* sane (to avoid infinite recursion).
*/
#if 1
/* The code below is incorrect if .toString() or .valueOf() have
* have been overridden. The correct approach would be to look up
* the method(s) and if they resolve to the built-in function we
* can safely bypass it and look up the internal value directly.
* Unimplemented for now, abort fast path for boxed values.
*/
goto abort_fastpath;
#else /* disabled */
/* Disabled until fixed, see above. */
duk_tval *tv_internal;
DUK_DD(DUK_DDPRINT("auto unboxing in fast path"));
tv_internal = duk_hobject_get_internal_value_tval_ptr(js_ctx->thr->heap, obj);
DUK_ASSERT(tv_internal != NULL);
DUK_ASSERT(DUK_TVAL_IS_STRING(tv_internal) ||
DUK_TVAL_IS_NUMBER(tv_internal) ||
DUK_TVAL_IS_BOOLEAN(tv_internal) ||
DUK_TVAL_IS_POINTER(tv_internal));
tv = tv_internal;
DUK_ASSERT(js_ctx->recursion_depth > 0);
js_ctx->recursion_depth--; /* required to keep recursion depth correct */
goto restart_match;
#endif /* disabled */
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
} else if (c_bit & c_func) {
DUK__EMIT_STRIDX(js_ctx, js_ctx->stridx_custom_function);
} else if (c_bit & c_bufobj) {
duk__enc_bufferobject(js_ctx, (duk_hbufferobject *) obj);
#endif
} else {
DUK_ASSERT((c_bit & c_undef) != 0);
/* Must decrease recursion depth before returning. */
DUK_ASSERT(js_ctx->recursion_depth > 0);
DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit);
js_ctx->recursion_depth--;
goto emit_undefined;
}
DUK_ASSERT(js_ctx->recursion_depth > 0);
DUK_ASSERT(js_ctx->recursion_depth <= js_ctx->recursion_limit);
js_ctx->recursion_depth--;
break;
}
case DUK_TAG_BUFFER: {
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
if (js_ctx->flag_ext_custom_or_compatible) {
duk__enc_buffer(js_ctx, DUK_TVAL_GET_BUFFER(tv));
break;
} else {
goto emit_undefined;
}
#else
goto emit_undefined;
#endif
}
case DUK_TAG_POINTER: {
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
if (js_ctx->flag_ext_custom_or_compatible) {
duk__enc_pointer(js_ctx, DUK_TVAL_GET_POINTER(tv));
break;
} else {
goto emit_undefined;
}
#else
goto emit_undefined;
#endif
}
case DUK_TAG_LIGHTFUNC: {
/* A lightfunc might also inherit a .toJSON() so just bail out. */
/* XXX: Could just lookup .toJSON() and continue in fast path,
* as it would almost never be defined.
*/
DUK_DD(DUK_DDPRINT("value is a lightfunc, abort fast path"));
goto abort_fastpath;
}
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT: {
/* Number serialization has a significant impact relative to
* other fast path code, so careful fast path for fastints.
*/
duk__enc_fastint_tval(js_ctx, tv);
break;
}
#endif
default: {
/* XXX: A fast path for usual integers would be useful when
* fastint support is not enabled.
*/
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
/* XXX: Stack discipline is annoying, could be changed in numconv. */
duk_push_tval((duk_context *) js_ctx->thr, tv);
duk__enc_double(js_ctx);
duk_pop((duk_context *) js_ctx->thr);
#if 0
/* Could also rely on native sprintf(), but it will handle
* values like NaN, Infinity, -0, exponent notation etc in
* a JSON-incompatible way.
*/
duk_double_t d;
char buf[64];
DUK_ASSERT(DUK_TVAL_IS_DOUBLE(tv));
d = DUK_TVAL_GET_DOUBLE(tv);
DUK_SPRINTF(buf, "%lg", d);
DUK__EMIT_CSTR(js_ctx, buf);
#endif
}
}
return 1; /* not undefined */
emit_undefined:
return 0; /* value was undefined/unsupported */
abort_fastpath:
/* Error message doesn't matter: the error is ignored anyway. */
DUK_DD(DUK_DDPRINT("aborting fast path"));
DUK_ERROR_INTERNAL_DEFMSG(js_ctx->thr);
return 0; /* unreachable */
}
DUK_LOCAL duk_ret_t duk__json_stringify_fast(duk_context *ctx) {
duk_json_enc_ctx *js_ctx;
duk_tval *tv;
DUK_ASSERT(ctx != NULL);
tv = DUK_GET_TVAL_NEGIDX(ctx, -2);
DUK_ASSERT(DUK_TVAL_IS_POINTER(tv));
js_ctx = (duk_json_enc_ctx *) DUK_TVAL_GET_POINTER(tv);
DUK_ASSERT(js_ctx != NULL);
tv = DUK_GET_TVAL_NEGIDX(ctx, -1);
if (duk__json_stringify_fast_value(js_ctx, tv) == 0) {
DUK_DD(DUK_DDPRINT("top level value not supported, fail fast path"));
return DUK_RET_ERROR; /* error message doesn't matter, ignored anyway */
}
return 0;
}
#endif /* DUK_USE_JSON_STRINGIFY_FASTPATH */
/*
* Top level wrappers
*/
DUK_INTERNAL
void duk_bi_json_parse_helper(duk_context *ctx,
duk_idx_t idx_value,
duk_idx_t idx_reviver,
duk_small_uint_t flags) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_json_dec_ctx js_ctx_alloc;
duk_json_dec_ctx *js_ctx = &js_ctx_alloc;
duk_hstring *h_text;
#ifdef DUK_USE_ASSERTIONS
duk_idx_t entry_top = duk_get_top(ctx);
#endif
/* negative top-relative indices not allowed now */
DUK_ASSERT(idx_value == DUK_INVALID_INDEX || idx_value >= 0);
DUK_ASSERT(idx_reviver == DUK_INVALID_INDEX || idx_reviver >= 0);
DUK_DDD(DUK_DDDPRINT("JSON parse start: text=%!T, reviver=%!T, flags=0x%08lx, stack_top=%ld",
(duk_tval *) duk_get_tval(ctx, idx_value),
(duk_tval *) duk_get_tval(ctx, idx_reviver),
(unsigned long) flags,
(long) duk_get_top(ctx)));
DUK_MEMZERO(&js_ctx_alloc, sizeof(js_ctx_alloc));
js_ctx->thr = thr;
#ifdef DUK_USE_EXPLICIT_NULL_INIT
/* nothing now */
#endif
js_ctx->recursion_limit = DUK_USE_JSON_DEC_RECLIMIT;
DUK_ASSERT(js_ctx->recursion_depth == 0);
/* Flag handling currently assumes that flags are consistent. This is OK
* because the call sites are now strictly controlled.
*/
js_ctx->flags = flags;
#if defined(DUK_USE_JX)
js_ctx->flag_ext_custom = flags & DUK_JSON_FLAG_EXT_CUSTOM;
#endif
#if defined(DUK_USE_JC)
js_ctx->flag_ext_compatible = flags & DUK_JSON_FLAG_EXT_COMPATIBLE;
#endif
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
js_ctx->flag_ext_custom_or_compatible = flags & (DUK_JSON_FLAG_EXT_CUSTOM | DUK_JSON_FLAG_EXT_COMPATIBLE);
#endif
h_text = duk_to_hstring(ctx, idx_value); /* coerce in-place */
DUK_ASSERT(h_text != NULL);
/* JSON parsing code is allowed to read [p_start,p_end]: p_end is
* valid and points to the string NUL terminator (which is always
* guaranteed for duk_hstrings.
*/
js_ctx->p_start = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_text);
js_ctx->p = js_ctx->p_start;
js_ctx->p_end = ((const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_text)) +
DUK_HSTRING_GET_BYTELEN(h_text);
DUK_ASSERT(*(js_ctx->p_end) == 0x00);
duk__dec_value(js_ctx); /* -> [ ... value ] */
/* Trailing whitespace has been eaten by duk__dec_value(), so if
* we're not at end of input here, it's a SyntaxError.
*/
if (js_ctx->p != js_ctx->p_end) {
duk__dec_syntax_error(js_ctx);
}
if (duk_is_callable(ctx, idx_reviver)) {
DUK_DDD(DUK_DDDPRINT("applying reviver: %!T",
(duk_tval *) duk_get_tval(ctx, idx_reviver)));
js_ctx->idx_reviver = idx_reviver;
duk_push_object(ctx);
duk_dup(ctx, -2); /* -> [ ... val root val ] */
duk_put_prop_stridx(ctx, -2, DUK_STRIDX_EMPTY_STRING); /* default attrs ok */
duk_push_hstring_stridx(ctx, DUK_STRIDX_EMPTY_STRING); /* -> [ ... val root "" ] */
DUK_DDD(DUK_DDDPRINT("start reviver walk, root=%!T, name=%!T",
(duk_tval *) duk_get_tval(ctx, -2),
(duk_tval *) duk_get_tval(ctx, -1)));
duk__dec_reviver_walk(js_ctx); /* [ ... val root "" ] -> [ ... val val' ] */
duk_remove(ctx, -2); /* -> [ ... val' ] */
} else {
DUK_DDD(DUK_DDDPRINT("reviver does not exist or is not callable: %!T",
(duk_tval *) duk_get_tval(ctx, idx_reviver)));
}
/* Final result is at stack top. */
DUK_DDD(DUK_DDDPRINT("JSON parse end: text=%!T, reviver=%!T, flags=0x%08lx, result=%!T, stack_top=%ld",
(duk_tval *) duk_get_tval(ctx, idx_value),
(duk_tval *) duk_get_tval(ctx, idx_reviver),
(unsigned long) flags,
(duk_tval *) duk_get_tval(ctx, -1),
(long) duk_get_top(ctx)));
DUK_ASSERT(duk_get_top(ctx) == entry_top + 1);
}
DUK_INTERNAL
void duk_bi_json_stringify_helper(duk_context *ctx,
duk_idx_t idx_value,
duk_idx_t idx_replacer,
duk_idx_t idx_space,
duk_small_uint_t flags) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_json_enc_ctx js_ctx_alloc;
duk_json_enc_ctx *js_ctx = &js_ctx_alloc;
duk_hobject *h;
duk_idx_t idx_holder;
duk_idx_t entry_top;
/* negative top-relative indices not allowed now */
DUK_ASSERT(idx_value == DUK_INVALID_INDEX || idx_value >= 0);
DUK_ASSERT(idx_replacer == DUK_INVALID_INDEX || idx_replacer >= 0);
DUK_ASSERT(idx_space == DUK_INVALID_INDEX || idx_space >= 0);
DUK_DDD(DUK_DDDPRINT("JSON stringify start: value=%!T, replacer=%!T, space=%!T, flags=0x%08lx, stack_top=%ld",
(duk_tval *) duk_get_tval(ctx, idx_value),
(duk_tval *) duk_get_tval(ctx, idx_replacer),
(duk_tval *) duk_get_tval(ctx, idx_space),
(unsigned long) flags,
(long) duk_get_top(ctx)));
entry_top = duk_get_top(ctx);
/*
* Context init
*/
DUK_MEMZERO(&js_ctx_alloc, sizeof(js_ctx_alloc));
js_ctx->thr = thr;
#ifdef DUK_USE_EXPLICIT_NULL_INIT
js_ctx->h_replacer = NULL;
js_ctx->h_gap = NULL;
#endif
js_ctx->idx_proplist = -1;
/* Flag handling currently assumes that flags are consistent. This is OK
* because the call sites are now strictly controlled.
*/
js_ctx->flags = flags;
js_ctx->flag_ascii_only = flags & DUK_JSON_FLAG_ASCII_ONLY;
js_ctx->flag_avoid_key_quotes = flags & DUK_JSON_FLAG_AVOID_KEY_QUOTES;
#ifdef DUK_USE_JX
js_ctx->flag_ext_custom = flags & DUK_JSON_FLAG_EXT_CUSTOM;
#endif
#ifdef DUK_USE_JC
js_ctx->flag_ext_compatible = flags & DUK_JSON_FLAG_EXT_COMPATIBLE;
#endif
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
js_ctx->flag_ext_custom_or_compatible = flags & (DUK_JSON_FLAG_EXT_CUSTOM | DUK_JSON_FLAG_EXT_COMPATIBLE);
#endif
/* The #ifdef clutter here handles the JX/JC enable/disable
* combinations properly.
*/
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
#if defined(DUK_USE_JX)
if (flags & DUK_JSON_FLAG_EXT_CUSTOM) {
js_ctx->stridx_custom_undefined = DUK_STRIDX_LC_UNDEFINED;
js_ctx->stridx_custom_nan = DUK_STRIDX_NAN;
js_ctx->stridx_custom_neginf = DUK_STRIDX_MINUS_INFINITY;
js_ctx->stridx_custom_posinf = DUK_STRIDX_INFINITY;
js_ctx->stridx_custom_function =
(flags & DUK_JSON_FLAG_AVOID_KEY_QUOTES) ?
DUK_STRIDX_JSON_EXT_FUNCTION2 :
DUK_STRIDX_JSON_EXT_FUNCTION1;
}
#endif /* DUK_USE_JX */
#if defined(DUK_USE_JX) && defined(DUK_USE_JC)
else
#endif /* DUK_USE_JX && DUK_USE_JC */
#if defined(DUK_USE_JC)
if (js_ctx->flags & DUK_JSON_FLAG_EXT_COMPATIBLE) {
js_ctx->stridx_custom_undefined = DUK_STRIDX_JSON_EXT_UNDEFINED;
js_ctx->stridx_custom_nan = DUK_STRIDX_JSON_EXT_NAN;
js_ctx->stridx_custom_neginf = DUK_STRIDX_JSON_EXT_NEGINF;
js_ctx->stridx_custom_posinf = DUK_STRIDX_JSON_EXT_POSINF;
js_ctx->stridx_custom_function = DUK_STRIDX_JSON_EXT_FUNCTION1;
}
#endif /* DUK_USE_JC */
#endif /* DUK_USE_JX || DUK_USE_JC */
#if defined(DUK_USE_JX) || defined(DUK_USE_JC)
if (js_ctx->flags & (DUK_JSON_FLAG_EXT_CUSTOM |
DUK_JSON_FLAG_EXT_COMPATIBLE)) {
DUK_ASSERT(js_ctx->mask_for_undefined == 0); /* already zero */
}
else
#endif /* DUK_USE_JX || DUK_USE_JC */
{
js_ctx->mask_for_undefined = DUK_TYPE_MASK_UNDEFINED |
DUK_TYPE_MASK_POINTER |
DUK_TYPE_MASK_BUFFER |
DUK_TYPE_MASK_LIGHTFUNC;
}
DUK_BW_INIT_PUSHBUF(thr, &js_ctx->bw, DUK__JSON_STRINGIFY_BUFSIZE);
js_ctx->idx_loop = duk_push_object_internal(ctx);
DUK_ASSERT(js_ctx->idx_loop >= 0);
/* [ ... buf loop ] */
/*
* Process replacer/proplist (2nd argument to JSON.stringify)
*/
h = duk_get_hobject(ctx, idx_replacer);
if (h != NULL) {
if (DUK_HOBJECT_IS_CALLABLE(h)) {
js_ctx->h_replacer = h;
} else if (DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_ARRAY) {
/* Here the specification requires correct array index enumeration
* which is a bit tricky for sparse arrays (it is handled by the
* enum setup code). We now enumerate ancestors too, although the
* specification is not very clear on whether that is required.
*/
duk_uarridx_t plist_idx = 0;
duk_small_uint_t enum_flags;
js_ctx->idx_proplist = duk_push_array(ctx); /* XXX: array internal? */
enum_flags = DUK_ENUM_ARRAY_INDICES_ONLY |
DUK_ENUM_SORT_ARRAY_INDICES; /* expensive flag */
duk_enum(ctx, idx_replacer, enum_flags);
while (duk_next(ctx, -1 /*enum_index*/, 1 /*get_value*/)) {
/* [ ... proplist enum_obj key val ] */
if (duk__enc_allow_into_proplist(duk_get_tval(ctx, -1))) {
/* XXX: duplicates should be eliminated here */
DUK_DDD(DUK_DDDPRINT("proplist enum: key=%!T, val=%!T --> accept",
(duk_tval *) duk_get_tval(ctx, -2),
(duk_tval *) duk_get_tval(ctx, -1)));
duk_to_string(ctx, -1); /* extra coercion of strings is OK */
duk_put_prop_index(ctx, -4, plist_idx); /* -> [ ... proplist enum_obj key ] */
plist_idx++;
duk_pop(ctx);
} else {
DUK_DDD(DUK_DDDPRINT("proplist enum: key=%!T, val=%!T --> reject",
(duk_tval *) duk_get_tval(ctx, -2),
(duk_tval *) duk_get_tval(ctx, -1)));
duk_pop_2(ctx);
}
}
duk_pop(ctx); /* pop enum */
/* [ ... proplist ] */
}
}
/* [ ... buf loop (proplist) ] */
/*
* Process space (3rd argument to JSON.stringify)
*/
h = duk_get_hobject(ctx, idx_space);
if (h != NULL) {
int c = DUK_HOBJECT_GET_CLASS_NUMBER(h);
if (c == DUK_HOBJECT_CLASS_NUMBER) {
duk_to_number(ctx, idx_space);
} else if (c == DUK_HOBJECT_CLASS_STRING) {
duk_to_string(ctx, idx_space);
}
}
if (duk_is_number(ctx, idx_space)) {
duk_small_int_t nspace;
/* spaces[] must be static to allow initializer with old compilers like BCC */
static const char spaces[10] = {
DUK_ASC_SPACE, DUK_ASC_SPACE, DUK_ASC_SPACE, DUK_ASC_SPACE,
DUK_ASC_SPACE, DUK_ASC_SPACE, DUK_ASC_SPACE, DUK_ASC_SPACE,
DUK_ASC_SPACE, DUK_ASC_SPACE
}; /* XXX: helper */
/* ToInteger() coercion; NaN -> 0, infinities are clamped to 0 and 10 */
nspace = (duk_small_int_t) duk_to_int_clamped(ctx, idx_space, 0 /*minval*/, 10 /*maxval*/);
DUK_ASSERT(nspace >= 0 && nspace <= 10);
duk_push_lstring(ctx, spaces, (duk_size_t) nspace);
js_ctx->h_gap = duk_get_hstring(ctx, -1);
DUK_ASSERT(js_ctx->h_gap != NULL);
} else if (duk_is_string(ctx, idx_space)) {
/* XXX: substring in-place at idx_place? */
duk_dup(ctx, idx_space);
duk_substring(ctx, -1, 0, 10); /* clamp to 10 chars */
js_ctx->h_gap = duk_get_hstring(ctx, -1);
DUK_ASSERT(js_ctx->h_gap != NULL);
} else {
/* nop */
}
if (js_ctx->h_gap != NULL) {
/* if gap is empty, behave as if not given at all */
if (DUK_HSTRING_GET_CHARLEN(js_ctx->h_gap) == 0) {
js_ctx->h_gap = NULL;
}
}
/* [ ... buf loop (proplist) (gap) ] */
/*
* Fast path: assume no mutation, iterate object property tables
* directly; bail out if that assumption doesn't hold.
*/
#if defined(DUK_USE_JSON_STRINGIFY_FASTPATH)
if (js_ctx->h_replacer == NULL && /* replacer is a mutation risk */
js_ctx->idx_proplist == -1) { /* proplist is very rare */
duk_int_t pcall_rc;
#ifdef DUK_USE_MARK_AND_SWEEP
duk_small_uint_t prev_mark_and_sweep_base_flags;
#endif
DUK_DD(DUK_DDPRINT("try JSON.stringify() fast path"));
/* Use recursion_limit to ensure we don't overwrite js_ctx->visiting[]
* array so we don't need two counter checks in the fast path. The
* slow path has a much larger recursion limit which we'll use if
* necessary.
*/
DUK_ASSERT(DUK_USE_JSON_ENC_RECLIMIT >= DUK_JSON_ENC_LOOPARRAY);
js_ctx->recursion_limit = DUK_JSON_ENC_LOOPARRAY;
DUK_ASSERT(js_ctx->recursion_depth == 0);
/* Execute the fast path in a protected call. If any error is thrown,
* fall back to the slow path. This includes e.g. recursion limit
* because the fast path has a smaller recursion limit (and simpler,
* limited loop detection).
*/
duk_push_pointer(ctx, (void *) js_ctx);
duk_dup(ctx, idx_value);
#if defined(DUK_USE_MARK_AND_SWEEP)
/* Must prevent finalizers which may have arbitrary side effects. */
prev_mark_and_sweep_base_flags = thr->heap->mark_and_sweep_base_flags;
thr->heap->mark_and_sweep_base_flags |=
DUK_MS_FLAG_NO_FINALIZERS | /* avoid attempts to add/remove object keys */
DUK_MS_FLAG_NO_OBJECT_COMPACTION; /* avoid attempt to compact any objects */
#endif
pcall_rc = duk_safe_call(ctx, duk__json_stringify_fast, 2 /*nargs*/, 0 /*nret*/);
#if defined(DUK_USE_MARK_AND_SWEEP)
thr->heap->mark_and_sweep_base_flags = prev_mark_and_sweep_base_flags;
#endif
if (pcall_rc == DUK_EXEC_SUCCESS) {
DUK_DD(DUK_DDPRINT("fast path successful"));
DUK_BW_PUSH_AS_STRING(thr, &js_ctx->bw);
goto replace_finished;
}
/* We come here for actual aborts (like encountering .toJSON())
* but also for recursion/loop errors. Bufwriter size can be
* kept because we'll probably need at least as much as we've
* allocated so far.
*/
DUK_D(DUK_DPRINT("fast path failed, serialize using slow path instead"));
DUK_BW_RESET_SIZE(thr, &js_ctx->bw);
js_ctx->recursion_depth = 0;
}
#endif
/*
* Create wrapper object and serialize
*/
idx_holder = duk_push_object(ctx);
duk_dup(ctx, idx_value);
duk_put_prop_stridx(ctx, -2, DUK_STRIDX_EMPTY_STRING);
DUK_DDD(DUK_DDDPRINT("before: flags=0x%08lx, loop=%!T, replacer=%!O, "
"proplist=%!T, gap=%!O, holder=%!T",
(unsigned long) js_ctx->flags,
(duk_tval *) duk_get_tval(ctx, js_ctx->idx_loop),
(duk_heaphdr *) js_ctx->h_replacer,
(duk_tval *) (js_ctx->idx_proplist >= 0 ? duk_get_tval(ctx, js_ctx->idx_proplist) : NULL),
(duk_heaphdr *) js_ctx->h_gap,
(duk_tval *) duk_get_tval(ctx, -1)));
/* serialize the wrapper with empty string key */
duk_push_hstring_stridx(ctx, DUK_STRIDX_EMPTY_STRING);
/* [ ... buf loop (proplist) (gap) holder "" ] */
js_ctx->recursion_limit = DUK_USE_JSON_ENC_RECLIMIT;
DUK_ASSERT(js_ctx->recursion_depth == 0);
if (DUK_UNLIKELY(duk__enc_value(js_ctx, idx_holder) == 0)) { /* [ ... holder key ] -> [ ... holder ] */
/* Result is undefined. */
duk_push_undefined(ctx);
} else {
/* Convert buffer to result string. */
DUK_BW_PUSH_AS_STRING(thr, &js_ctx->bw);
}
DUK_DDD(DUK_DDDPRINT("after: flags=0x%08lx, loop=%!T, replacer=%!O, "
"proplist=%!T, gap=%!O, holder=%!T",
(unsigned long) js_ctx->flags,
(duk_tval *) duk_get_tval(ctx, js_ctx->idx_loop),
(duk_heaphdr *) js_ctx->h_replacer,
(duk_tval *) (js_ctx->idx_proplist >= 0 ? duk_get_tval(ctx, js_ctx->idx_proplist) : NULL),
(duk_heaphdr *) js_ctx->h_gap,
(duk_tval *) duk_get_tval(ctx, idx_holder)));
/* The stack has a variable shape here, so force it to the
* desired one explicitly.
*/
#if defined(DUK_USE_JSON_STRINGIFY_FASTPATH)
replace_finished:
#endif
duk_replace(ctx, entry_top);
duk_set_top(ctx, entry_top + 1);
DUK_DDD(DUK_DDDPRINT("JSON stringify end: value=%!T, replacer=%!T, space=%!T, "
"flags=0x%08lx, result=%!T, stack_top=%ld",
(duk_tval *) duk_get_tval(ctx, idx_value),
(duk_tval *) duk_get_tval(ctx, idx_replacer),
(duk_tval *) duk_get_tval(ctx, idx_space),
(unsigned long) flags,
(duk_tval *) duk_get_tval(ctx, -1),
(long) duk_get_top(ctx)));
DUK_ASSERT(duk_get_top(ctx) == entry_top + 1);
}
/*
* Entry points
*/
DUK_INTERNAL duk_ret_t duk_bi_json_object_parse(duk_context *ctx) {
duk_bi_json_parse_helper(ctx,
0 /*idx_value*/,
1 /*idx_replacer*/,
0 /*flags*/);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_json_object_stringify(duk_context *ctx) {
duk_bi_json_stringify_helper(ctx,
0 /*idx_value*/,
1 /*idx_replacer*/,
2 /*idx_space*/,
0 /*flags*/);
return 1;
}
#undef DUK__JSON_DECSTR_BUFSIZE
#undef DUK__JSON_DECSTR_CHUNKSIZE
#undef DUK__JSON_ENCSTR_CHUNKSIZE
#undef DUK__JSON_STRINGIFY_BUFSIZE
#undef DUK__JSON_MAX_ESC_LEN
#line 1 "duk_bi_logger.c"
/*
* Logging support
*/
/* include removed: duk_internal.h */
/* 3-letter log level strings */
DUK_LOCAL const duk_uint8_t duk__log_level_strings[] = {
(duk_uint8_t) DUK_ASC_UC_T, (duk_uint8_t) DUK_ASC_UC_R, (duk_uint8_t) DUK_ASC_UC_C,
(duk_uint8_t) DUK_ASC_UC_D, (duk_uint8_t) DUK_ASC_UC_B, (duk_uint8_t) DUK_ASC_UC_G,
(duk_uint8_t) DUK_ASC_UC_I, (duk_uint8_t) DUK_ASC_UC_N, (duk_uint8_t) DUK_ASC_UC_F,
(duk_uint8_t) DUK_ASC_UC_W, (duk_uint8_t) DUK_ASC_UC_R, (duk_uint8_t) DUK_ASC_UC_N,
(duk_uint8_t) DUK_ASC_UC_E, (duk_uint8_t) DUK_ASC_UC_R, (duk_uint8_t) DUK_ASC_UC_R,
(duk_uint8_t) DUK_ASC_UC_F, (duk_uint8_t) DUK_ASC_UC_T, (duk_uint8_t) DUK_ASC_UC_L
};
/* Constructor */
DUK_INTERNAL duk_ret_t duk_bi_logger_constructor(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_idx_t nargs;
/* Calling as a non-constructor is not meaningful. */
if (!duk_is_constructor_call(ctx)) {
return DUK_RET_TYPE_ERROR;
}
nargs = duk_get_top(ctx);
duk_set_top(ctx, 1);
duk_push_this(ctx);
/* [ name this ] */
if (nargs == 0) {
/* Automatic defaulting of logger name from caller. This would
* work poorly with tail calls, but constructor calls are currently
* never tail calls, so tail calls are not an issue now.
*/
if (thr->callstack_top >= 2) {
duk_activation *act_caller = thr->callstack + thr->callstack_top - 2;
duk_hobject *func_caller;
func_caller = DUK_ACT_GET_FUNC(act_caller);
if (func_caller) {
/* Stripping the filename might be a good idea
* ("/foo/bar/quux.js" -> logger name "quux"),
* but now used verbatim.
*/
duk_push_hobject(ctx, func_caller);
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_FILE_NAME);
duk_replace(ctx, 0);
}
}
}
/* the stack is unbalanced here on purpose; we only rely on the
* initial two values: [ name this ].
*/
if (duk_is_string(ctx, 0)) {
duk_dup(ctx, 0);
duk_put_prop_stridx(ctx, 1, DUK_STRIDX_LC_N);
} else {
/* don't set 'n' at all, inherited value is used as name */
}
duk_compact(ctx, 1);
return 0; /* keep default instance */
}
/* Default function to format objects. Tries to use toLogString() but falls
* back to toString(). Any errors are propagated out without catching.
*/
DUK_INTERNAL duk_ret_t duk_bi_logger_prototype_fmt(duk_context *ctx) {
if (duk_get_prop_stridx(ctx, 0, DUK_STRIDX_TO_LOG_STRING)) {
/* [ arg toLogString ] */
duk_dup(ctx, 0);
duk_call_method(ctx, 0);
/* [ arg result ] */
return 1;
}
/* [ arg undefined ] */
duk_pop(ctx);
duk_to_string(ctx, 0);
return 1;
}
/* Default function to write a formatted log line. Writes to stderr,
* appending a newline to the log line.
*
* The argument is a buffer whose visible size contains the log message.
* This function should avoid coercing the buffer to a string to avoid
* string table traffic.
*/
DUK_INTERNAL duk_ret_t duk_bi_logger_prototype_raw(duk_context *ctx) {
const char *data;
duk_size_t data_len;
DUK_UNREF(ctx);
DUK_UNREF(data);
DUK_UNREF(data_len);
#ifdef DUK_USE_FILE_IO
data = (const char *) duk_require_buffer(ctx, 0, &data_len);
DUK_FWRITE((const void *) data, 1, data_len, DUK_STDERR);
DUK_FPUTC((int) '\n', DUK_STDERR);
DUK_FFLUSH(DUK_STDERR);
#else
/* nop */
#endif
return 0;
}
/* Log frontend shared helper, magic value indicates log level. Provides
* frontend functions: trace(), debug(), info(), warn(), error(), fatal().
* This needs to have small footprint, reasonable performance, minimal
* memory churn, etc.
*/
DUK_INTERNAL duk_ret_t duk_bi_logger_prototype_log_shared(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_double_t now;
duk_small_int_t entry_lev = duk_get_current_magic(ctx);
duk_small_int_t logger_lev;
duk_int_t nargs;
duk_int_t i;
duk_size_t tot_len;
const duk_uint8_t *arg_str;
duk_size_t arg_len;
duk_uint8_t *buf, *p;
const duk_uint8_t *q;
duk_uint8_t date_buf[DUK_BI_DATE_ISO8601_BUFSIZE];
duk_size_t date_len;
duk_small_int_t rc;
DUK_ASSERT(entry_lev >= 0 && entry_lev <= 5);
DUK_UNREF(thr);
/* XXX: sanitize to printable (and maybe ASCII) */
/* XXX: better multiline */
/*
* Logger arguments are:
*
* magic: log level (0-5)
* this: logger
* stack: plain log args
*
* We want to minimize memory churn so a two-pass approach
* is used: first pass formats arguments and computes final
* string length, second pass copies strings either into a
* pre-allocated and reused buffer (short messages) or into a
* newly allocated fixed buffer. If the backend function plays
* nice, it won't coerce the buffer to a string (and thus
* intern it).
*/
nargs = duk_get_top(ctx);
/* [ arg1 ... argN this ] */
/*
* Log level check
*/
duk_push_this(ctx);
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_LC_L);
logger_lev = (duk_small_int_t) duk_get_int(ctx, -1);
if (entry_lev < logger_lev) {
return 0;
}
/* log level could be popped but that's not necessary */
now = DUK_USE_DATE_GET_NOW(ctx);
duk_bi_date_format_timeval(now, date_buf);
date_len = DUK_STRLEN((const char *) date_buf);
duk_get_prop_stridx(ctx, -2, DUK_STRIDX_LC_N);
duk_to_string(ctx, -1);
DUK_ASSERT(duk_is_string(ctx, -1));
/* [ arg1 ... argN this loggerLevel loggerName ] */
/*
* Pass 1
*/
/* Line format: <time> <entryLev> <loggerName>: <msg> */
tot_len = 0;
tot_len += 3 + /* separators: space, space, colon */
3 + /* level string */
date_len + /* time */
duk_get_length(ctx, -1); /* loggerName */
for (i = 0; i < nargs; i++) {
/* When formatting an argument to a string, errors may happen from multiple
* causes. In general we want to catch obvious errors like a toLogString()
* throwing an error, but we don't currently try to catch every possible
* error. In particular, internal errors (like out of memory or stack) are
* not caught. Also, we expect Error toString() to not throw an error.
*/
if (duk_is_object(ctx, i)) {
/* duk_pcall_prop() may itself throw an error, but we're content
* in catching the obvious errors (like toLogString() throwing an
* error).
*/
duk_push_hstring_stridx(ctx, DUK_STRIDX_FMT);
duk_dup(ctx, i);
/* [ arg1 ... argN this loggerLevel loggerName 'fmt' arg ] */
/* call: this.fmt(arg) */
rc = duk_pcall_prop(ctx, -5 /*obj_index*/, 1 /*nargs*/);
if (rc) {
/* Keep the error as the result (coercing it might fail below,
* but we don't catch that now).
*/
;
}
duk_replace(ctx, i);
}
(void) duk_to_lstring(ctx, i, &arg_len);
tot_len++; /* sep (even before first one) */
tot_len += arg_len;
}
/*
* Pass 2
*/
/* XXX: There used to be a shared log buffer here, but it was removed
* when dynamic buffer spare was removed. The problem with using
* bufwriter is that, without the spare, the buffer gets passed on
* as an argument to the raw() call so it'd need to be resized
* (reallocated) anyway. If raw() call convention is changed, this
* could be made more efficient.
*/
buf = (duk_uint8_t *) duk_push_fixed_buffer(ctx, tot_len);
DUK_ASSERT(buf != NULL);
p = buf;
DUK_MEMCPY((void *) p, (const void *) date_buf, (size_t) date_len);
p += date_len;
*p++ = (duk_uint8_t) DUK_ASC_SPACE;
q = duk__log_level_strings + (entry_lev * 3);
DUK_MEMCPY((void *) p, (const void *) q, (size_t) 3);
p += 3;
*p++ = (duk_uint8_t) DUK_ASC_SPACE;
arg_str = (const duk_uint8_t *) duk_get_lstring(ctx, -2, &arg_len);
DUK_MEMCPY((void *) p, (const void *) arg_str, (size_t) arg_len);
p += arg_len;
*p++ = (duk_uint8_t) DUK_ASC_COLON;
for (i = 0; i < nargs; i++) {
*p++ = (duk_uint8_t) DUK_ASC_SPACE;
arg_str = (const duk_uint8_t *) duk_get_lstring(ctx, i, &arg_len);
DUK_ASSERT(arg_str != NULL);
DUK_MEMCPY((void *) p, (const void *) arg_str, (size_t) arg_len);
p += arg_len;
}
DUK_ASSERT(buf + tot_len == p);
/* [ arg1 ... argN this loggerLevel loggerName buffer ] */
#if defined(DUK_USE_DEBUGGER_SUPPORT) && defined(DUK_USE_DEBUGGER_FWD_LOGGING)
/* Do debugger forwarding before raw() because the raw() function
* doesn't get the log level right now.
*/
if (DUK_HEAP_IS_DEBUGGER_ATTACHED(thr->heap)) {
const char *log_buf;
duk_size_t sz_buf;
log_buf = (const char *) duk_get_buffer(ctx, -1, &sz_buf);
DUK_ASSERT(log_buf != NULL);
duk_debug_write_notify(thr, DUK_DBG_CMD_LOG);
duk_debug_write_int(thr, (duk_int32_t) entry_lev);
duk_debug_write_string(thr, (const char *) log_buf, sz_buf);
duk_debug_write_eom(thr);
}
#endif
/* Call this.raw(msg); look up through the instance allows user to override
* the raw() function in the instance or in the prototype for maximum
* flexibility.
*/
duk_push_hstring_stridx(ctx, DUK_STRIDX_RAW);
duk_dup(ctx, -2);
/* [ arg1 ... argN this loggerLevel loggerName buffer 'raw' buffer ] */
duk_call_prop(ctx, -6, 1); /* this.raw(buffer) */
return 0;
}
#line 1 "duk_bi_math.c"
/*
* Math built-ins
*/
/* include removed: duk_internal.h */
#if defined(DUK_USE_MATH_BUILTIN)
/*
* Use static helpers which can work with math.h functions matching
* the following signatures. This is not portable if any of these math
* functions is actually a macro.
*
* Typing here is intentionally 'double' wherever values interact with
* the standard library APIs.
*/
typedef double (*duk__one_arg_func)(double);
typedef double (*duk__two_arg_func)(double, double);
DUK_LOCAL duk_ret_t duk__math_minmax(duk_context *ctx, duk_double_t initial, duk__two_arg_func min_max) {
duk_idx_t n = duk_get_top(ctx);
duk_idx_t i;
duk_double_t res = initial;
duk_double_t t;
/*
* Note: fmax() does not match the E5 semantics. E5 requires
* that if -any- input to Math.max() is a NaN, the result is a
* NaN. fmax() will return a NaN only if -both- inputs are NaN.
* Same applies to fmin().
*
* Note: every input value must be coerced with ToNumber(), even
* if we know the result will be a NaN anyway: ToNumber() may have
* side effects for which even order of evaluation matters.
*/
for (i = 0; i < n; i++) {
t = duk_to_number(ctx, i);
if (DUK_FPCLASSIFY(t) == DUK_FP_NAN || DUK_FPCLASSIFY(res) == DUK_FP_NAN) {
/* Note: not normalized, but duk_push_number() will normalize */
res = (duk_double_t) DUK_DOUBLE_NAN;
} else {
res = (duk_double_t) min_max(res, (double) t);
}
}
duk_push_number(ctx, res);
return 1;
}
DUK_LOCAL double duk__fmin_fixed(double x, double y) {
/* fmin() with args -0 and +0 is not guaranteed to return
* -0 as Ecmascript requires.
*/
if (x == 0 && y == 0) {
/* XXX: what's the safest way of creating a negative zero? */
if (DUK_SIGNBIT(x) != 0 || DUK_SIGNBIT(y) != 0) {
return -0.0;
} else {
return +0.0;
}
}
#ifdef DUK_USE_MATH_FMIN
return DUK_FMIN(x, y);
#else
return (x < y ? x : y);
#endif
}
DUK_LOCAL double duk__fmax_fixed(double x, double y) {
/* fmax() with args -0 and +0 is not guaranteed to return
* +0 as Ecmascript requires.
*/
if (x == 0 && y == 0) {
if (DUK_SIGNBIT(x) == 0 || DUK_SIGNBIT(y) == 0) {
return +0.0;
} else {
return -0.0;
}
}
#ifdef DUK_USE_MATH_FMAX
return DUK_FMAX(x, y);
#else
return (x > y ? x : y);
#endif
}
DUK_LOCAL double duk__round_fixed(double x) {
/* Numbers half-way between integers must be rounded towards +Infinity,
* e.g. -3.5 must be rounded to -3 (not -4). When rounded to zero, zero
* sign must be set appropriately. E5.1 Section 15.8.2.15.
*
* Note that ANSI C round() is "round to nearest integer, away from zero",
* which is incorrect for negative values. Here we make do with floor().
*/
duk_small_int_t c = (duk_small_int_t) DUK_FPCLASSIFY(x);
if (c == DUK_FP_NAN || c == DUK_FP_INFINITE || c == DUK_FP_ZERO) {
return x;
}
/*
* x is finite and non-zero
*
* -1.6 -> floor(-1.1) -> -2
* -1.5 -> floor(-1.0) -> -1 (towards +Inf)
* -1.4 -> floor(-0.9) -> -1
* -0.5 -> -0.0 (special case)
* -0.1 -> -0.0 (special case)
* +0.1 -> +0.0 (special case)
* +0.5 -> floor(+1.0) -> 1 (towards +Inf)
* +1.4 -> floor(+1.9) -> 1
* +1.5 -> floor(+2.0) -> 2 (towards +Inf)
* +1.6 -> floor(+2.1) -> 2
*/
if (x >= -0.5 && x < 0.5) {
/* +0.5 is handled by floor, this is on purpose */
if (x < 0.0) {
return -0.0;
} else {
return +0.0;
}
}
return DUK_FLOOR(x + 0.5);
}
DUK_LOCAL double duk__pow_fixed(double x, double y) {
/* The ANSI C pow() semantics differ from Ecmascript.
*
* E.g. when x==1 and y is +/- infinite, the Ecmascript required
* result is NaN, while at least Linux pow() returns 1.
*/
duk_small_int_t cx, cy, sx;
DUK_UNREF(cx);
DUK_UNREF(sx);
cy = (duk_small_int_t) DUK_FPCLASSIFY(y);
if (cy == DUK_FP_NAN) {
goto ret_nan;
}
if (DUK_FABS(x) == 1.0 && cy == DUK_FP_INFINITE) {
goto ret_nan;
}
#if defined(DUK_USE_POW_NETBSD_WORKAROUND)
/* See test-bug-netbsd-math-pow.js: NetBSD 6.0 on x86 (at least) does not
* correctly handle some cases where x=+/-0. Specific fixes to these
* here.
*/
cx = (duk_small_int_t) DUK_FPCLASSIFY(x);
if (cx == DUK_FP_ZERO && y < 0.0) {
sx = (duk_small_int_t) DUK_SIGNBIT(x);
if (sx == 0) {
/* Math.pow(+0,y) should be Infinity when y<0. NetBSD pow()
* returns -Infinity instead when y is <0 and finite. The
* if-clause also catches y == -Infinity (which works even
* without the fix).
*/
return DUK_DOUBLE_INFINITY;
} else {
/* Math.pow(-0,y) where y<0 should be:
* - -Infinity if y<0 and an odd integer
* - Infinity otherwise
* NetBSD pow() returns -Infinity for all finite y<0. The
* if-clause also catches y == -Infinity (which works even
* without the fix).
*/
/* fmod() return value has same sign as input (negative) so
* the result here will be in the range ]-2,0], 1 indicates
* odd. If x is -Infinity, NaN is returned and the odd check
* always concludes "not odd" which results in desired outcome.
*/
double tmp = DUK_FMOD(y, 2);
if (tmp == -1.0) {
return -DUK_DOUBLE_INFINITY;
} else {
/* Not odd, or y == -Infinity */
return DUK_DOUBLE_INFINITY;
}
}
}
#endif
return DUK_POW(x, y);
ret_nan:
return DUK_DOUBLE_NAN;
}
/* Wrappers for calling standard math library methods. These may be required
* on platforms where one or more of the math built-ins are defined as macros
* or inline functions and are thus not suitable to be used as function pointers.
*/
#if defined(DUK_USE_AVOID_PLATFORM_FUNCPTRS)
DUK_LOCAL double duk__fabs(double x) {
return DUK_FABS(x);
}
DUK_LOCAL double duk__acos(double x) {
return DUK_ACOS(x);
}
DUK_LOCAL double duk__asin(double x) {
return DUK_ASIN(x);
}
DUK_LOCAL double duk__atan(double x) {
return DUK_ATAN(x);
}
DUK_LOCAL double duk__ceil(double x) {
return DUK_CEIL(x);
}
DUK_LOCAL double duk__cos(double x) {
return DUK_COS(x);
}
DUK_LOCAL double duk__exp(double x) {
return DUK_EXP(x);
}
DUK_LOCAL double duk__floor(double x) {
return DUK_FLOOR(x);
}
DUK_LOCAL double duk__log(double x) {
return DUK_LOG(x);
}
DUK_LOCAL double duk__sin(double x) {
return DUK_SIN(x);
}
DUK_LOCAL double duk__sqrt(double x) {
return DUK_SQRT(x);
}
DUK_LOCAL double duk__tan(double x) {
return DUK_TAN(x);
}
DUK_LOCAL double duk__atan2(double x, double y) {
return DUK_ATAN2(x, y);
}
#endif /* DUK_USE_AVOID_PLATFORM_FUNCPTRS */
/* order must match constants in genbuiltins.py */
DUK_LOCAL const duk__one_arg_func duk__one_arg_funcs[] = {
#if defined(DUK_USE_AVOID_PLATFORM_FUNCPTRS)
duk__fabs,
duk__acos,
duk__asin,
duk__atan,
duk__ceil,
duk__cos,
duk__exp,
duk__floor,
duk__log,
duk__round_fixed,
duk__sin,
duk__sqrt,
duk__tan
#else
DUK_FABS,
DUK_ACOS,
DUK_ASIN,
DUK_ATAN,
DUK_CEIL,
DUK_COS,
DUK_EXP,
DUK_FLOOR,
DUK_LOG,
duk__round_fixed,
DUK_SIN,
DUK_SQRT,
DUK_TAN
#endif
};
/* order must match constants in genbuiltins.py */
DUK_LOCAL const duk__two_arg_func duk__two_arg_funcs[] = {
#if defined(DUK_USE_AVOID_PLATFORM_FUNCPTRS)
duk__atan2,
duk__pow_fixed
#else
DUK_ATAN2,
duk__pow_fixed
#endif
};
DUK_INTERNAL duk_ret_t duk_bi_math_object_onearg_shared(duk_context *ctx) {
duk_small_int_t fun_idx = duk_get_current_magic(ctx);
duk__one_arg_func fun;
DUK_ASSERT(fun_idx >= 0);
DUK_ASSERT(fun_idx < (duk_small_int_t) (sizeof(duk__one_arg_funcs) / sizeof(duk__one_arg_func)));
fun = duk__one_arg_funcs[fun_idx];
duk_push_number(ctx, (duk_double_t) fun((double) duk_to_number(ctx, 0)));
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_math_object_twoarg_shared(duk_context *ctx) {
duk_small_int_t fun_idx = duk_get_current_magic(ctx);
duk__two_arg_func fun;
DUK_ASSERT(fun_idx >= 0);
DUK_ASSERT(fun_idx < (duk_small_int_t) (sizeof(duk__two_arg_funcs) / sizeof(duk__two_arg_func)));
fun = duk__two_arg_funcs[fun_idx];
duk_push_number(ctx, (duk_double_t) fun((double) duk_to_number(ctx, 0), (double) duk_to_number(ctx, 1)));
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_math_object_max(duk_context *ctx) {
return duk__math_minmax(ctx, -DUK_DOUBLE_INFINITY, duk__fmax_fixed);
}
DUK_INTERNAL duk_ret_t duk_bi_math_object_min(duk_context *ctx) {
return duk__math_minmax(ctx, DUK_DOUBLE_INFINITY, duk__fmin_fixed);
}
DUK_INTERNAL duk_ret_t duk_bi_math_object_random(duk_context *ctx) {
duk_push_number(ctx, (duk_double_t) duk_util_tinyrandom_get_double((duk_hthread *) ctx));
return 1;
}
#else /* DUK_USE_MATH_BUILTIN */
/* A stubbed built-in is useful for e.g. compilation torture testing with BCC. */
DUK_INTERNAL duk_ret_t duk_bi_math_object_onearg_shared(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNIMPLEMENTED_ERROR;
}
DUK_INTERNAL duk_ret_t duk_bi_math_object_twoarg_shared(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNIMPLEMENTED_ERROR;
}
DUK_INTERNAL duk_ret_t duk_bi_math_object_max(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNIMPLEMENTED_ERROR;
}
DUK_INTERNAL duk_ret_t duk_bi_math_object_min(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNIMPLEMENTED_ERROR;
}
DUK_INTERNAL duk_ret_t duk_bi_math_object_random(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNIMPLEMENTED_ERROR;
}
#endif /* DUK_USE_MATH_BUILTIN */
#line 1 "duk_bi_number.c"
/*
* Number built-ins
*/
/* include removed: duk_internal.h */
DUK_LOCAL duk_double_t duk__push_this_number_plain(duk_context *ctx) {
duk_hobject *h;
/* Number built-in accepts a plain number or a Number object (whose
* internal value is operated on). Other types cause TypeError.
*/
duk_push_this(ctx);
if (duk_is_number(ctx, -1)) {
DUK_DDD(DUK_DDDPRINT("plain number value: %!T", (duk_tval *) duk_get_tval(ctx, -1)));
goto done;
}
h = duk_get_hobject(ctx, -1);
if (!h ||
(DUK_HOBJECT_GET_CLASS_NUMBER(h) != DUK_HOBJECT_CLASS_NUMBER)) {
DUK_DDD(DUK_DDDPRINT("unacceptable this value: %!T", (duk_tval *) duk_get_tval(ctx, -1)));
DUK_ERROR_TYPE((duk_hthread *) ctx, "number expected");
}
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_VALUE);
DUK_ASSERT(duk_is_number(ctx, -1));
DUK_DDD(DUK_DDDPRINT("number object: %!T, internal value: %!T",
(duk_tval *) duk_get_tval(ctx, -2), (duk_tval *) duk_get_tval(ctx, -1)));
duk_remove(ctx, -2);
done:
return duk_get_number(ctx, -1);
}
DUK_INTERNAL duk_ret_t duk_bi_number_constructor(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_idx_t nargs;
duk_hobject *h_this;
DUK_UNREF(thr);
/*
* The Number constructor uses ToNumber(arg) for number coercion
* (coercing an undefined argument to NaN). However, if the
* argument is not given at all, +0 must be used instead. To do
* this, a vararg function is used.
*/
nargs = duk_get_top(ctx);
if (nargs == 0) {
duk_push_int(ctx, 0);
}
duk_to_number(ctx, 0);
duk_set_top(ctx, 1);
DUK_ASSERT_TOP(ctx, 1);
if (!duk_is_constructor_call(ctx)) {
return 1;
}
/*
* E5 Section 15.7.2.1 requires that the constructed object
* must have the original Number.prototype as its internal
* prototype. However, since Number.prototype is non-writable
* and non-configurable, this doesn't have to be enforced here:
* The default object (bound to 'this') is OK, though we have
* to change its class.
*
* Internal value set to ToNumber(arg) or +0; if no arg given,
* ToNumber(undefined) = NaN, so special treatment is needed
* (above). String internal value is immutable.
*/
/* XXX: helper */
duk_push_this(ctx);
h_this = duk_get_hobject(ctx, -1);
DUK_ASSERT(h_this != NULL);
DUK_HOBJECT_SET_CLASS_NUMBER(h_this, DUK_HOBJECT_CLASS_NUMBER);
DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h_this) == thr->builtins[DUK_BIDX_NUMBER_PROTOTYPE]);
DUK_ASSERT(DUK_HOBJECT_GET_CLASS_NUMBER(h_this) == DUK_HOBJECT_CLASS_NUMBER);
DUK_ASSERT(DUK_HOBJECT_HAS_EXTENSIBLE(h_this));
duk_dup(ctx, 0); /* -> [ val obj val ] */
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE);
return 0; /* no return value -> don't replace created value */
}
DUK_INTERNAL duk_ret_t duk_bi_number_prototype_value_of(duk_context *ctx) {
(void) duk__push_this_number_plain(ctx);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_number_prototype_to_string(duk_context *ctx) {
duk_small_int_t radix;
duk_small_uint_t n2s_flags;
(void) duk__push_this_number_plain(ctx);
if (duk_is_undefined(ctx, 0)) {
radix = 10;
} else {
radix = (duk_small_int_t) duk_to_int_check_range(ctx, 0, 2, 36);
}
DUK_DDD(DUK_DDDPRINT("radix=%ld", (long) radix));
n2s_flags = 0;
duk_numconv_stringify(ctx,
radix /*radix*/,
0 /*digits*/,
n2s_flags /*flags*/);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_number_prototype_to_locale_string(duk_context *ctx) {
/* XXX: just use toString() for now; permitted although not recommended.
* nargs==1, so radix is passed to toString().
*/
return duk_bi_number_prototype_to_string(ctx);
}
/*
* toFixed(), toExponential(), toPrecision()
*/
/* XXX: shared helper for toFixed(), toExponential(), toPrecision()? */
DUK_INTERNAL duk_ret_t duk_bi_number_prototype_to_fixed(duk_context *ctx) {
duk_small_int_t frac_digits;
duk_double_t d;
duk_small_int_t c;
duk_small_uint_t n2s_flags;
frac_digits = (duk_small_int_t) duk_to_int_check_range(ctx, 0, 0, 20);
d = duk__push_this_number_plain(ctx);
c = (duk_small_int_t) DUK_FPCLASSIFY(d);
if (c == DUK_FP_NAN || c == DUK_FP_INFINITE) {
goto use_to_string;
}
if (d >= 1.0e21 || d <= -1.0e21) {
goto use_to_string;
}
n2s_flags = DUK_N2S_FLAG_FIXED_FORMAT |
DUK_N2S_FLAG_FRACTION_DIGITS;
duk_numconv_stringify(ctx,
10 /*radix*/,
frac_digits /*digits*/,
n2s_flags /*flags*/);
return 1;
use_to_string:
DUK_ASSERT_TOP(ctx, 2);
duk_to_string(ctx, -1);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_number_prototype_to_exponential(duk_context *ctx) {
duk_bool_t frac_undefined;
duk_small_int_t frac_digits;
duk_double_t d;
duk_small_int_t c;
duk_small_uint_t n2s_flags;
d = duk__push_this_number_plain(ctx);
frac_undefined = duk_is_undefined(ctx, 0);
duk_to_int(ctx, 0); /* for side effects */
c = (duk_small_int_t) DUK_FPCLASSIFY(d);
if (c == DUK_FP_NAN || c == DUK_FP_INFINITE) {
goto use_to_string;
}
frac_digits = (duk_small_int_t) duk_to_int_check_range(ctx, 0, 0, 20);
n2s_flags = DUK_N2S_FLAG_FORCE_EXP |
(frac_undefined ? 0 : DUK_N2S_FLAG_FIXED_FORMAT);
duk_numconv_stringify(ctx,
10 /*radix*/,
frac_digits + 1 /*leading digit + fractions*/,
n2s_flags /*flags*/);
return 1;
use_to_string:
DUK_ASSERT_TOP(ctx, 2);
duk_to_string(ctx, -1);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_number_prototype_to_precision(duk_context *ctx) {
/* The specification has quite awkward order of coercion and
* checks for toPrecision(). The operations below are a bit
* reordered, within constraints of observable side effects.
*/
duk_double_t d;
duk_small_int_t prec;
duk_small_int_t c;
duk_small_uint_t n2s_flags;
DUK_ASSERT_TOP(ctx, 1);
d = duk__push_this_number_plain(ctx);
if (duk_is_undefined(ctx, 0)) {
goto use_to_string;
}
DUK_ASSERT_TOP(ctx, 2);
duk_to_int(ctx, 0); /* for side effects */
c = (duk_small_int_t) DUK_FPCLASSIFY(d);
if (c == DUK_FP_NAN || c == DUK_FP_INFINITE) {
goto use_to_string;
}
prec = (duk_small_int_t) duk_to_int_check_range(ctx, 0, 1, 21);
n2s_flags = DUK_N2S_FLAG_FIXED_FORMAT |
DUK_N2S_FLAG_NO_ZERO_PAD;
duk_numconv_stringify(ctx,
10 /*radix*/,
prec /*digits*/,
n2s_flags /*flags*/);
return 1;
use_to_string:
/* Used when precision is undefined; also used for NaN (-> "NaN"),
* and +/- infinity (-> "Infinity", "-Infinity").
*/
DUK_ASSERT_TOP(ctx, 2);
duk_to_string(ctx, -1);
return 1;
}
#line 1 "duk_bi_object.c"
/*
* Object built-ins
*/
/* include removed: duk_internal.h */
DUK_INTERNAL duk_ret_t duk_bi_object_constructor(duk_context *ctx) {
if (!duk_is_constructor_call(ctx) &&
!duk_is_null_or_undefined(ctx, 0)) {
duk_to_object(ctx, 0);
return 1;
}
if (duk_is_object(ctx, 0)) {
return 1;
}
/* Pointer and buffer primitive values are treated like other
* primitives values which have a fully fledged object counterpart:
* promote to an object value. Lightfuncs are coerced with
* ToObject() even they could also be returned as is.
*/
if (duk_check_type_mask(ctx, 0, DUK_TYPE_MASK_STRING |
DUK_TYPE_MASK_BOOLEAN |
DUK_TYPE_MASK_NUMBER |
DUK_TYPE_MASK_POINTER |
DUK_TYPE_MASK_BUFFER |
DUK_TYPE_MASK_LIGHTFUNC)) {
duk_to_object(ctx, 0);
return 1;
}
duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT),
DUK_BIDX_OBJECT_PROTOTYPE);
return 1;
}
/* Shared helper to implement Object.getPrototypeOf and the ES6
* Object.prototype.__proto__ getter.
*
* http://www.ecma-international.org/ecma-262/6.0/index.html#sec-get-object.prototype.__proto__
*/
DUK_INTERNAL duk_ret_t duk_bi_object_getprototype_shared(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h;
duk_hobject *proto;
DUK_UNREF(thr);
/* magic: 0=getter call, 1=Object.getPrototypeOf */
if (duk_get_current_magic(ctx) == 0) {
duk_push_this_coercible_to_object(ctx);
duk_insert(ctx, 0);
}
h = duk_require_hobject_or_lfunc(ctx, 0);
/* h is NULL for lightfunc */
/* XXX: should the API call handle this directly, i.e. attempt
* to duk_push_hobject(ctx, null) would push a null instead?
* (On the other hand 'undefined' would be just as logical, but
* not wanted here.)
*/
if (h == NULL) {
duk_push_hobject_bidx(ctx, DUK_BIDX_FUNCTION_PROTOTYPE);
} else {
proto = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h);
if (proto) {
duk_push_hobject(ctx, proto);
} else {
duk_push_null(ctx);
}
}
return 1;
}
/* Shared helper to implement ES6 Object.setPrototypeOf and
* Object.prototype.__proto__ setter.
*
* http://www.ecma-international.org/ecma-262/6.0/index.html#sec-get-object.prototype.__proto__
* http://www.ecma-international.org/ecma-262/6.0/index.html#sec-object.setprototypeof
*/
DUK_INTERNAL duk_ret_t duk_bi_object_setprototype_shared(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h_obj;
duk_hobject *h_new_proto;
duk_hobject *h_curr;
duk_ret_t ret_success = 1; /* retval for success path */
/* Preliminaries for __proto__ and setPrototypeOf (E6 19.1.2.18 steps 1-4);
* magic: 0=setter call, 1=Object.setPrototypeOf
*/
if (duk_get_current_magic(ctx) == 0) {
duk_push_this_check_object_coercible(ctx);
duk_insert(ctx, 0);
if (!duk_check_type_mask(ctx, 1, DUK_TYPE_MASK_NULL | DUK_TYPE_MASK_OBJECT)) {
return 0;
}
/* __proto__ setter returns 'undefined' on success unlike the
* setPrototypeOf() call which returns the target object.
*/
ret_success = 0;
} else {
duk_require_object_coercible(ctx, 0);
duk_require_type_mask(ctx, 1, DUK_TYPE_MASK_NULL | DUK_TYPE_MASK_OBJECT);
}
h_new_proto = duk_get_hobject(ctx, 1);
/* h_new_proto may be NULL */
if (duk_is_lightfunc(ctx, 0)) {
if (h_new_proto == thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]) {
goto skip;
}
goto fail_nonextensible;
}
h_obj = duk_get_hobject(ctx, 0);
if (!h_obj) {
goto skip;
}
DUK_ASSERT(h_obj != NULL);
/* [[SetPrototypeOf]] standard behavior, E6 9.1.2 */
/* TODO: implement Proxy object support here */
if (h_new_proto == DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h_obj)) {
goto skip;
}
if (!DUK_HOBJECT_HAS_EXTENSIBLE(h_obj)) {
goto fail_nonextensible;
}
for (h_curr = h_new_proto; h_curr != NULL; h_curr = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h_curr)) {
/* Loop prevention */
if (h_curr == h_obj) {
goto fail_loop;
}
}
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, h_obj, h_new_proto);
/* fall thru */
skip:
duk_set_top(ctx, 1);
return ret_success;
fail_nonextensible:
fail_loop:
return DUK_RET_TYPE_ERROR;
}
DUK_INTERNAL duk_ret_t duk_bi_object_constructor_get_own_property_descriptor(duk_context *ctx) {
/* XXX: no need for indirect call */
return duk_hobject_object_get_own_property_descriptor(ctx);
}
DUK_INTERNAL duk_ret_t duk_bi_object_constructor_create(duk_context *ctx) {
duk_tval *tv;
duk_hobject *proto = NULL;
DUK_ASSERT_TOP(ctx, 2);
tv = duk_get_tval(ctx, 0);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_NULL(tv)) {
;
} else if (DUK_TVAL_IS_OBJECT(tv)) {
proto = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(proto != NULL);
} else {
return DUK_RET_TYPE_ERROR;
}
(void) duk_push_object_helper_proto(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT),
proto);
if (!duk_is_undefined(ctx, 1)) {
/* [ O Properties obj ] */
duk_replace(ctx, 0);
/* [ obj Properties ] */
/* Just call the "original" Object.defineProperties() to
* finish up.
*/
return duk_bi_object_constructor_define_properties(ctx);
}
/* [ O Properties obj ] */
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_object_constructor_define_property(duk_context *ctx) {
duk_hobject *obj;
duk_hstring *key;
duk_hobject *get;
duk_hobject *set;
duk_idx_t idx_value;
duk_uint_t defprop_flags;
DUK_ASSERT(ctx != NULL);
DUK_DDD(DUK_DDDPRINT("Object.defineProperty(): ctx=%p obj=%!T key=%!T desc=%!T",
(void *) ctx,
(duk_tval *) duk_get_tval(ctx, 0),
(duk_tval *) duk_get_tval(ctx, 1),
(duk_tval *) duk_get_tval(ctx, 2)));
/* [ obj key desc ] */
/* Lightfuncs are currently supported by coercing to a temporary
* Function object; changes will be allowed (the coerced value is
* extensible) but will be lost.
*/
obj = duk_require_hobject_or_lfunc_coerce(ctx, 0);
(void) duk_to_string(ctx, 1);
key = duk_require_hstring(ctx, 1);
(void) duk_require_hobject(ctx, 2);
DUK_ASSERT(obj != NULL);
DUK_ASSERT(key != NULL);
DUK_ASSERT(duk_get_hobject(ctx, 2) != NULL);
/*
* Validate and convert argument property descriptor (an Ecmascript
* object) into a set of defprop_flags and possibly property value,
* getter, and/or setter values on the value stack.
*
* Lightfunc set/get values are coerced to full Functions.
*/
duk_hobject_prepare_property_descriptor(ctx,
2 /*idx_desc*/,
&defprop_flags,
&idx_value,
&get,
&set);
/*
* Use Object.defineProperty() helper for the actual operation.
*/
duk_hobject_define_property_helper(ctx,
defprop_flags,
obj,
key,
idx_value,
get,
set);
/* Ignore the normalize/validate helper outputs on the value stack,
* they're popped automatically.
*/
/*
* Return target object.
*/
duk_push_hobject(ctx, obj);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_object_constructor_define_properties(duk_context *ctx) {
duk_small_uint_t pass;
duk_uint_t defprop_flags;
duk_hobject *obj;
duk_idx_t idx_value;
duk_hobject *get;
duk_hobject *set;
/* Lightfunc handling by ToObject() coercion. */
obj = duk_require_hobject_or_lfunc_coerce(ctx, 0); /* target */
DUK_ASSERT(obj != NULL);
duk_to_object(ctx, 1); /* properties object */
DUK_DDD(DUK_DDDPRINT("target=%!iT, properties=%!iT",
(duk_tval *) duk_get_tval(ctx, 0),
(duk_tval *) duk_get_tval(ctx, 1)));
/*
* Two pass approach to processing the property descriptors.
* On first pass validate and normalize all descriptors before
* any changes are made to the target object. On second pass
* make the actual modifications to the target object.
*
* Right now we'll just use the same normalize/validate helper
* on both passes, ignoring its outputs on the first pass.
*/
for (pass = 0; pass < 2; pass++) {
duk_set_top(ctx, 2); /* -> [ hobject props ] */
duk_enum(ctx, 1, DUK_ENUM_OWN_PROPERTIES_ONLY /*enum_flags*/);
for (;;) {
duk_hstring *key;
/* [ hobject props enum(props) ] */
duk_set_top(ctx, 3);
if (!duk_next(ctx, 2, 1 /*get_value*/)) {
break;
}
DUK_DDD(DUK_DDDPRINT("-> key=%!iT, desc=%!iT",
(duk_tval *) duk_get_tval(ctx, -2),
(duk_tval *) duk_get_tval(ctx, -1)));
/* [ hobject props enum(props) key desc ] */
duk_hobject_prepare_property_descriptor(ctx,
4 /*idx_desc*/,
&defprop_flags,
&idx_value,
&get,
&set);
/* [ hobject props enum(props) key desc value? getter? setter? ] */
if (pass == 0) {
continue;
}
key = duk_get_hstring(ctx, 3);
DUK_ASSERT(key != NULL);
duk_hobject_define_property_helper(ctx,
defprop_flags,
obj,
key,
idx_value,
get,
set);
}
}
/*
* Return target object
*/
duk_dup(ctx, 0);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_object_constructor_seal_freeze_shared(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h;
duk_bool_t is_freeze;
h = duk_require_hobject_or_lfunc(ctx, 0);
if (!h) {
/* Lightfunc, always success. */
return 1;
}
is_freeze = (duk_bool_t) duk_get_current_magic(ctx);
duk_hobject_object_seal_freeze_helper(thr, h, is_freeze);
/* Sealed and frozen objects cannot gain any more properties,
* so this is a good time to compact them.
*/
duk_hobject_compact_props(thr, h);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_object_constructor_prevent_extensions(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h;
h = duk_require_hobject_or_lfunc(ctx, 0);
if (!h) {
/* Lightfunc, always success. */
return 1;
}
DUK_ASSERT(h != NULL);
DUK_HOBJECT_CLEAR_EXTENSIBLE(h);
/* A non-extensible object cannot gain any more properties,
* so this is a good time to compact.
*/
duk_hobject_compact_props(thr, h);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_object_constructor_is_sealed_frozen_shared(duk_context *ctx) {
duk_hobject *h;
duk_bool_t is_frozen;
duk_bool_t rc;
h = duk_require_hobject_or_lfunc(ctx, 0);
if (!h) {
duk_push_true(ctx); /* frozen and sealed */
} else {
is_frozen = duk_get_current_magic(ctx);
rc = duk_hobject_object_is_sealed_frozen_helper((duk_hthread *) ctx, h, is_frozen /*is_frozen*/);
duk_push_boolean(ctx, rc);
}
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_object_constructor_is_extensible(duk_context *ctx) {
duk_hobject *h;
h = duk_require_hobject_or_lfunc(ctx, 0);
if (!h) {
duk_push_false(ctx);
} else {
duk_push_boolean(ctx, DUK_HOBJECT_HAS_EXTENSIBLE(h));
}
return 1;
}
/* Shared helper for Object.getOwnPropertyNames() and Object.keys().
* Magic: 0=getOwnPropertyNames, 1=Object.keys.
*/
DUK_INTERNAL duk_ret_t duk_bi_object_constructor_keys_shared(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *obj;
#if defined(DUK_USE_ES6_PROXY)
duk_hobject *h_proxy_target;
duk_hobject *h_proxy_handler;
duk_hobject *h_trap_result;
duk_uarridx_t i, len, idx;
#endif
duk_small_uint_t enum_flags;
DUK_ASSERT_TOP(ctx, 1);
DUK_UNREF(thr);
obj = duk_require_hobject_or_lfunc_coerce(ctx, 0);
DUK_ASSERT(obj != NULL);
DUK_UNREF(obj);
#if defined(DUK_USE_ES6_PROXY)
if (DUK_LIKELY(!duk_hobject_proxy_check(thr,
obj,
&h_proxy_target,
&h_proxy_handler))) {
goto skip_proxy;
}
duk_push_hobject(ctx, h_proxy_handler);
if (!duk_get_prop_stridx(ctx, -1, DUK_STRIDX_OWN_KEYS)) {
/* Careful with reachability here: don't pop 'obj' before pushing
* proxy target.
*/
DUK_DDD(DUK_DDDPRINT("no ownKeys trap, get keys of target instead"));
duk_pop_2(ctx);
duk_push_hobject(ctx, h_proxy_target);
duk_replace(ctx, 0);
DUK_ASSERT_TOP(ctx, 1);
goto skip_proxy;
}
/* [ obj handler trap ] */
duk_insert(ctx, -2);
duk_push_hobject(ctx, h_proxy_target); /* -> [ obj trap handler target ] */
duk_call_method(ctx, 1 /*nargs*/); /* -> [ obj trap_result ] */
h_trap_result = duk_require_hobject(ctx, -1);
DUK_UNREF(h_trap_result);
len = (duk_uarridx_t) duk_get_length(ctx, -1);
idx = 0;
duk_push_array(ctx);
for (i = 0; i < len; i++) {
/* [ obj trap_result res_arr ] */
if (duk_get_prop_index(ctx, -2, i) && duk_is_string(ctx, -1)) {
/* XXX: for Object.keys() we should check enumerability of key */
/* [ obj trap_result res_arr propname ] */
duk_put_prop_index(ctx, -2, idx);
idx++;
} else {
duk_pop(ctx);
}
}
/* XXX: missing trap result validation for non-configurable target keys
* (must be present), for non-extensible target all target keys must be
* present and no extra keys can be present.
* http://www.ecma-international.org/ecma-262/6.0/#sec-proxy-object-internal-methods-and-internal-slots-ownpropertykeys
*/
/* XXX: for Object.keys() the [[OwnPropertyKeys]] result (trap result)
* should be filtered so that only enumerable keys remain. Enumerability
* should be checked with [[GetOwnProperty]] on the original object
* (i.e., the proxy in this case). If the proxy has a getOwnPropertyDescriptor
* trap, it should be triggered for every property. If the proxy doesn't have
* the trap, enumerability should be checked against the target object instead.
* We don't do any of this now, so Object.keys() and Object.getOwnPropertyNames()
* return the same result now for proxy traps. We still do clean up the trap
* result, so that Object.keys() and Object.getOwnPropertyNames() will return a
* clean array of strings without gaps.
*/
return 1;
skip_proxy:
#endif /* DUK_USE_ES6_PROXY */
DUK_ASSERT_TOP(ctx, 1);
if (duk_get_current_magic(ctx)) {
/* Object.keys */
enum_flags = DUK_ENUM_OWN_PROPERTIES_ONLY |
DUK_ENUM_NO_PROXY_BEHAVIOR;
} else {
/* Object.getOwnPropertyNames */
enum_flags = DUK_ENUM_INCLUDE_NONENUMERABLE |
DUK_ENUM_OWN_PROPERTIES_ONLY |
DUK_ENUM_NO_PROXY_BEHAVIOR;
}
return duk_hobject_get_enumerated_keys(ctx, enum_flags);
}
DUK_INTERNAL duk_ret_t duk_bi_object_prototype_to_string(duk_context *ctx) {
duk_push_this(ctx);
duk_to_object_class_string_top(ctx);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_object_prototype_to_locale_string(duk_context *ctx) {
DUK_ASSERT_TOP(ctx, 0);
(void) duk_push_this_coercible_to_object(ctx);
duk_get_prop_stridx(ctx, 0, DUK_STRIDX_TO_STRING);
if (!duk_is_callable(ctx, 1)) {
return DUK_RET_TYPE_ERROR;
}
duk_dup(ctx, 0); /* -> [ O toString O ] */
duk_call_method(ctx, 0); /* XXX: call method tail call? */
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_object_prototype_value_of(duk_context *ctx) {
(void) duk_push_this_coercible_to_object(ctx);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_object_prototype_is_prototype_of(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h_v;
duk_hobject *h_obj;
DUK_ASSERT_TOP(ctx, 1);
h_v = duk_get_hobject(ctx, 0);
if (!h_v) {
duk_push_false(ctx); /* XXX: tail call: return duk_push_false(ctx) */
return 1;
}
h_obj = duk_push_this_coercible_to_object(ctx);
DUK_ASSERT(h_obj != NULL);
/* E5.1 Section 15.2.4.6, step 3.a, lookup proto once before compare.
* Prototype loops should cause an error to be thrown.
*/
duk_push_boolean(ctx, duk_hobject_prototype_chain_contains(thr, DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h_v), h_obj, 0 /*ignore_loop*/));
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_object_prototype_has_own_property(duk_context *ctx) {
return duk_hobject_object_ownprop_helper(ctx, 0 /*required_desc_flags*/);
}
DUK_INTERNAL duk_ret_t duk_bi_object_prototype_property_is_enumerable(duk_context *ctx) {
return duk_hobject_object_ownprop_helper(ctx, DUK_PROPDESC_FLAG_ENUMERABLE /*required_desc_flags*/);
}
#line 1 "duk_bi_pointer.c"
/*
* Pointer built-ins
*/
/* include removed: duk_internal.h */
/*
* Constructor
*/
DUK_INTERNAL duk_ret_t duk_bi_pointer_constructor(duk_context *ctx) {
/* XXX: this behavior is quite useless now; it would be nice to be able
* to create pointer values from e.g. numbers or strings. Numbers are
* problematic on 64-bit platforms though. Hex encoded strings?
*/
if (duk_get_top(ctx) == 0) {
duk_push_pointer(ctx, NULL);
} else {
duk_to_pointer(ctx, 0);
}
DUK_ASSERT(duk_is_pointer(ctx, 0));
duk_set_top(ctx, 1);
if (duk_is_constructor_call(ctx)) {
duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_POINTER),
DUK_BIDX_POINTER_PROTOTYPE);
/* Pointer object internal value is immutable */
duk_dup(ctx, 0);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE);
}
/* Note: unbalanced stack on purpose */
return 1;
}
/*
* toString(), valueOf()
*/
DUK_INTERNAL duk_ret_t duk_bi_pointer_prototype_tostring_shared(duk_context *ctx) {
duk_tval *tv;
duk_small_int_t to_string = duk_get_current_magic(ctx);
duk_push_this(ctx);
tv = duk_require_tval(ctx, -1);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_POINTER(tv)) {
/* nop */
} else if (DUK_TVAL_IS_OBJECT(tv)) {
duk_hobject *h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
/* Must be a "pointer object", i.e. class "Pointer" */
if (DUK_HOBJECT_GET_CLASS_NUMBER(h) != DUK_HOBJECT_CLASS_POINTER) {
goto type_error;
}
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_VALUE);
} else {
goto type_error;
}
if (to_string) {
duk_to_string(ctx, -1);
}
return 1;
type_error:
return DUK_RET_TYPE_ERROR;
}
#line 1 "duk_bi_proxy.c"
/*
* Proxy built-in (ES6)
*/
/* include removed: duk_internal.h */
#if defined(DUK_USE_ES6_PROXY)
DUK_INTERNAL duk_ret_t duk_bi_proxy_constructor(duk_context *ctx) {
duk_hobject *h_target;
duk_hobject *h_handler;
if (!duk_is_constructor_call(ctx)) {
return DUK_RET_TYPE_ERROR;
}
/* Reject a proxy object as the target because it would need
* special handler in property lookups. (ES6 has no such restriction)
*/
h_target = duk_require_hobject_or_lfunc_coerce(ctx, 0);
DUK_ASSERT(h_target != NULL);
if (DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(h_target)) {
return DUK_RET_TYPE_ERROR;
}
/* Reject a proxy object as the handler because it would cause
* potentially unbounded recursion. (ES6 has no such restriction)
*/
h_handler = duk_require_hobject_or_lfunc_coerce(ctx, 1);
DUK_ASSERT(h_handler != NULL);
if (DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(h_handler)) {
return DUK_RET_TYPE_ERROR;
}
/* XXX: the returned value is exotic in ES6, but we use a
* simple object here with no prototype. Without a prototype,
* [[DefaultValue]] coercion fails which is abit confusing.
* No callable check/handling in the current Proxy subset.
*/
(void) duk_push_object_helper_proto(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_EXOTIC_PROXYOBJ |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT),
NULL);
DUK_ASSERT_TOP(ctx, 3);
/* Make _Target and _Handler non-configurable and non-writable.
* They can still be forcibly changed by C code (both user and
* Duktape internal), but not by Ecmascript code.
*/
/* Proxy target */
duk_dup(ctx, 0);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_TARGET, DUK_PROPDESC_FLAGS_NONE);
/* Proxy handler */
duk_dup(ctx, 1);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_HANDLER, DUK_PROPDESC_FLAGS_NONE);
return 1; /* replacement handler */
}
#else /* DUK_USE_ES6_PROXY */
DUK_INTERNAL duk_ret_t duk_bi_proxy_constructor(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_ES6_PROXY */
#line 1 "duk_bi_regexp.c"
/*
* RegExp built-ins
*/
/* include removed: duk_internal.h */
#ifdef DUK_USE_REGEXP_SUPPORT
DUK_LOCAL void duk__get_this_regexp(duk_context *ctx) {
duk_hobject *h;
duk_push_this(ctx);
h = duk_require_hobject_with_class(ctx, -1, DUK_HOBJECT_CLASS_REGEXP);
DUK_ASSERT(h != NULL);
DUK_UNREF(h);
duk_insert(ctx, 0); /* prepend regexp to valstack 0 index */
}
/* XXX: much to improve (code size) */
DUK_INTERNAL duk_ret_t duk_bi_regexp_constructor(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h_pattern;
DUK_ASSERT_TOP(ctx, 2);
h_pattern = duk_get_hobject(ctx, 0);
if (!duk_is_constructor_call(ctx) &&
h_pattern != NULL &&
DUK_HOBJECT_GET_CLASS_NUMBER(h_pattern) == DUK_HOBJECT_CLASS_REGEXP &&
duk_is_undefined(ctx, 1)) {
/* Called as a function, pattern has [[Class]] "RegExp" and
* flags is undefined -> return object as is.
*/
duk_dup(ctx, 0);
return 1;
}
/* Else functionality is identical for function call and constructor
* call.
*/
if (h_pattern != NULL &&
DUK_HOBJECT_GET_CLASS_NUMBER(h_pattern) == DUK_HOBJECT_CLASS_REGEXP) {
if (duk_is_undefined(ctx, 1)) {
duk_bool_t flag_g, flag_i, flag_m;
duk_get_prop_stridx(ctx, 0, DUK_STRIDX_SOURCE);
flag_g = duk_get_prop_stridx_boolean(ctx, 0, DUK_STRIDX_GLOBAL, NULL);
flag_i = duk_get_prop_stridx_boolean(ctx, 0, DUK_STRIDX_IGNORE_CASE, NULL);
flag_m = duk_get_prop_stridx_boolean(ctx, 0, DUK_STRIDX_MULTILINE, NULL);
duk_push_sprintf(ctx, "%s%s%s",
(const char *) (flag_g ? "g" : ""),
(const char *) (flag_i ? "i" : ""),
(const char *) (flag_m ? "m" : ""));
/* [ ... pattern flags ] */
} else {
return DUK_RET_TYPE_ERROR;
}
} else {
if (duk_is_undefined(ctx, 0)) {
duk_push_string(ctx, "");
} else {
duk_dup(ctx, 0);
duk_to_string(ctx, -1);
}
if (duk_is_undefined(ctx, 1)) {
duk_push_string(ctx, "");
} else {
duk_dup(ctx, 1);
duk_to_string(ctx, -1);
}
/* [ ... pattern flags ] */
}
DUK_DDD(DUK_DDDPRINT("RegExp constructor/function call, pattern=%!T, flags=%!T",
(duk_tval *) duk_get_tval(ctx, -2), (duk_tval *) duk_get_tval(ctx, -1)));
/* [ ... pattern flags ] */
duk_regexp_compile(thr);
/* [ ... bytecode escaped_source ] */
duk_regexp_create_instance(thr);
/* [ ... RegExp ] */
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_exec(duk_context *ctx) {
duk__get_this_regexp(ctx);
/* [ regexp input ] */
duk_regexp_match((duk_hthread *) ctx);
/* [ result ] */
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_test(duk_context *ctx) {
duk__get_this_regexp(ctx);
/* [ regexp input ] */
/* result object is created and discarded; wasteful but saves code space */
duk_regexp_match((duk_hthread *) ctx);
/* [ result ] */
duk_push_boolean(ctx, (duk_is_null(ctx, -1) ? 0 : 1));
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_to_string(duk_context *ctx) {
duk_hstring *h_bc;
duk_small_int_t re_flags;
#if 0
/* A little tricky string approach to provide the flags string.
* This depends on the specific flag values in duk_regexp.h,
* which needs to be asserted for. In practice this doesn't
* produce more compact code than the easier approach in use.
*/
const char *flag_strings = "gim\0gi\0gm\0g\0";
duk_uint8_t flag_offsets[8] = {
(duk_uint8_t) 3, /* flags: "" */
(duk_uint8_t) 10, /* flags: "g" */
(duk_uint8_t) 5, /* flags: "i" */
(duk_uint8_t) 4, /* flags: "gi" */
(duk_uint8_t) 2, /* flags: "m" */
(duk_uint8_t) 7, /* flags: "gm" */
(duk_uint8_t) 1, /* flags: "im" */
(duk_uint8_t) 0, /* flags: "gim" */
};
DUK_ASSERT(DUK_RE_FLAG_GLOBAL == 1);
DUK_ASSERT(DUK_RE_FLAG_IGNORE_CASE == 2);
DUK_ASSERT(DUK_RE_FLAG_MULTILINE == 4);
#endif
duk__get_this_regexp(ctx);
/* [ regexp ] */
duk_get_prop_stridx(ctx, 0, DUK_STRIDX_SOURCE);
duk_get_prop_stridx(ctx, 0, DUK_STRIDX_INT_BYTECODE);
h_bc = duk_get_hstring(ctx, -1);
DUK_ASSERT(h_bc != NULL);
DUK_ASSERT(DUK_HSTRING_GET_BYTELEN(h_bc) >= 1);
DUK_ASSERT(DUK_HSTRING_GET_CHARLEN(h_bc) >= 1);
DUK_ASSERT(DUK_HSTRING_GET_DATA(h_bc)[0] < 0x80);
re_flags = (duk_small_int_t) DUK_HSTRING_GET_DATA(h_bc)[0];
/* [ regexp source bytecode ] */
#if 1
/* This is a cleaner approach and also produces smaller code than
* the other alternative. Use duk_require_string() for format
* safety (although the source property should always exist).
*/
duk_push_sprintf(ctx, "/%s/%s%s%s",
(const char *) duk_require_string(ctx, -2), /* require to be safe */
(re_flags & DUK_RE_FLAG_GLOBAL) ? "g" : "",
(re_flags & DUK_RE_FLAG_IGNORE_CASE) ? "i" : "",
(re_flags & DUK_RE_FLAG_MULTILINE) ? "m" : "");
#else
/* This should not be necessary because no-one should tamper with the
* regexp bytecode, but is prudent to avoid potential segfaults if that
* were to happen for some reason.
*/
re_flags &= 0x07;
DUK_ASSERT(re_flags >= 0 && re_flags <= 7); /* three flags */
duk_push_sprintf(ctx, "/%s/%s",
(const char *) duk_require_string(ctx, -2),
(const char *) (flag_strings + flag_offsets[re_flags]));
#endif
return 1;
}
#else /* DUK_USE_REGEXP_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_regexp_constructor(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_exec(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_test(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_to_string(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_REGEXP_SUPPORT */
#line 1 "duk_bi_string.c"
/*
* String built-ins
*/
/* XXX: There are several limitations in the current implementation for
* strings with >= 0x80000000UL characters. In some cases one would need
* to be able to represent the range [-0xffffffff,0xffffffff] and so on.
* Generally character and byte length are assumed to fit into signed 32
* bits (< 0x80000000UL). Places with issues are not marked explicitly
* below in all cases, look for signed type usage (duk_int_t etc) for
* offsets/lengths.
*/
/* include removed: duk_internal.h */
/*
* Constructor
*/
DUK_INTERNAL duk_ret_t duk_bi_string_constructor(duk_context *ctx) {
/* String constructor needs to distinguish between an argument not given at all
* vs. given as 'undefined'. We're a vararg function to handle this properly.
*/
if (duk_get_top(ctx) == 0) {
duk_push_hstring_stridx(ctx, DUK_STRIDX_EMPTY_STRING);
} else {
duk_to_string(ctx, 0);
}
DUK_ASSERT(duk_is_string(ctx, 0));
duk_set_top(ctx, 1);
if (duk_is_constructor_call(ctx)) {
duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_STRING),
DUK_BIDX_STRING_PROTOTYPE);
/* String object internal value is immutable */
duk_dup(ctx, 0);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE);
}
/* Note: unbalanced stack on purpose */
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_string_constructor_from_char_code(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_bufwriter_ctx bw_alloc;
duk_bufwriter_ctx *bw;
duk_idx_t i, n;
duk_ucodepoint_t cp;
/* XXX: It would be nice to build the string directly but ToUint16()
* coercion is needed so a generic helper would not be very
* helpful (perhaps coerce the value stack first here and then
* build a string from a duk_tval number sequence in one go?).
*/
n = duk_get_top(ctx);
bw = &bw_alloc;
DUK_BW_INIT_PUSHBUF(thr, bw, n); /* initial estimate for ASCII only codepoints */
for (i = 0; i < n; i++) {
/* XXX: could improve bufwriter handling to write multiple codepoints
* with one ensure call but the relative benefit would be quite small.
*/
#if defined(DUK_USE_NONSTD_STRING_FROMCHARCODE_32BIT)
/* ToUint16() coercion is mandatory in the E5.1 specification, but
* this non-compliant behavior makes more sense because we support
* non-BMP codepoints. Don't use CESU-8 because that'd create
* surrogate pairs.
*/
cp = (duk_ucodepoint_t) duk_to_uint32(ctx, i);
DUK_BW_WRITE_ENSURE_XUTF8(thr, bw, cp);
#else
cp = (duk_ucodepoint_t) duk_to_uint32(ctx, i);
DUK_BW_WRITE_ENSURE_CESU8(thr, bw, cp);
#endif
}
DUK_BW_COMPACT(thr, bw);
duk_to_string(ctx, -1);
return 1;
}
/*
* toString(), valueOf()
*/
DUK_INTERNAL duk_ret_t duk_bi_string_prototype_to_string(duk_context *ctx) {
duk_tval *tv;
duk_push_this(ctx);
tv = duk_require_tval(ctx, -1);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_STRING(tv)) {
/* return as is */
return 1;
} else if (DUK_TVAL_IS_OBJECT(tv)) {
duk_hobject *h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
/* Must be a "string object", i.e. class "String" */
if (DUK_HOBJECT_GET_CLASS_NUMBER(h) != DUK_HOBJECT_CLASS_STRING) {
goto type_error;
}
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_VALUE);
DUK_ASSERT(duk_is_string(ctx, -1));
return 1;
} else {
goto type_error;
}
/* never here, but fall through */
type_error:
return DUK_RET_TYPE_ERROR;
}
/*
* Character and charcode access
*/
DUK_INTERNAL duk_ret_t duk_bi_string_prototype_char_at(duk_context *ctx) {
duk_int_t pos;
/* XXX: faster implementation */
(void) duk_push_this_coercible_to_string(ctx);
pos = duk_to_int(ctx, 0);
duk_substring(ctx, -1, pos, pos + 1);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_string_prototype_char_code_at(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_int_t pos;
duk_hstring *h;
duk_bool_t clamped;
/* XXX: faster implementation */
DUK_DDD(DUK_DDDPRINT("arg=%!T", (duk_tval *) duk_get_tval(ctx, 0)));
h = duk_push_this_coercible_to_string(ctx);
DUK_ASSERT(h != NULL);
pos = duk_to_int_clamped_raw(ctx,
0 /*index*/,
0 /*min(incl)*/,
DUK_HSTRING_GET_CHARLEN(h) - 1 /*max(incl)*/,
&clamped /*out_clamped*/);
if (clamped) {
duk_push_number(ctx, DUK_DOUBLE_NAN);
return 1;
}
duk_push_u32(ctx, (duk_uint32_t) duk_hstring_char_code_at_raw(thr, h, pos));
return 1;
}
/*
* substring(), substr(), slice()
*/
/* XXX: any chance of merging these three similar but still slightly
* different algorithms so that footprint would be reduced?
*/
DUK_INTERNAL duk_ret_t duk_bi_string_prototype_substring(duk_context *ctx) {
duk_hstring *h;
duk_int_t start_pos, end_pos;
duk_int_t len;
h = duk_push_this_coercible_to_string(ctx);
DUK_ASSERT(h != NULL);
len = (duk_int_t) DUK_HSTRING_GET_CHARLEN(h);
/* [ start end str ] */
start_pos = duk_to_int_clamped(ctx, 0, 0, len);
if (duk_is_undefined(ctx, 1)) {
end_pos = len;
} else {
end_pos = duk_to_int_clamped(ctx, 1, 0, len);
}
DUK_ASSERT(start_pos >= 0 && start_pos <= len);
DUK_ASSERT(end_pos >= 0 && end_pos <= len);
if (start_pos > end_pos) {
duk_int_t tmp = start_pos;
start_pos = end_pos;
end_pos = tmp;
}
DUK_ASSERT(end_pos >= start_pos);
duk_substring(ctx, -1, (duk_size_t) start_pos, (duk_size_t) end_pos);
return 1;
}
#ifdef DUK_USE_SECTION_B
DUK_INTERNAL duk_ret_t duk_bi_string_prototype_substr(duk_context *ctx) {
duk_hstring *h;
duk_int_t start_pos, end_pos;
duk_int_t len;
/* Unlike non-obsolete String calls, substr() algorithm in E5.1
* specification will happily coerce undefined and null to strings
* ("undefined" and "null").
*/
duk_push_this(ctx);
h = duk_to_hstring(ctx, -1);
DUK_ASSERT(h != NULL);
len = (duk_int_t) DUK_HSTRING_GET_CHARLEN(h);
/* [ start length str ] */
/* The implementation for computing of start_pos and end_pos differs
* from the standard algorithm, but is intended to result in the exactly
* same behavior. This is not always obvious.
*/
/* combines steps 2 and 5; -len ensures max() not needed for step 5 */
start_pos = duk_to_int_clamped(ctx, 0, -len, len);
if (start_pos < 0) {
start_pos = len + start_pos;
}
DUK_ASSERT(start_pos >= 0 && start_pos <= len);
/* combines steps 3, 6; step 7 is not needed */
if (duk_is_undefined(ctx, 1)) {
end_pos = len;
} else {
DUK_ASSERT(start_pos <= len);
end_pos = start_pos + duk_to_int_clamped(ctx, 1, 0, len - start_pos);
}
DUK_ASSERT(start_pos >= 0 && start_pos <= len);
DUK_ASSERT(end_pos >= 0 && end_pos <= len);
DUK_ASSERT(end_pos >= start_pos);
duk_substring(ctx, -1, (duk_size_t) start_pos, (duk_size_t) end_pos);
return 1;
}
#else /* DUK_USE_SECTION_B */
DUK_INTERNAL duk_ret_t duk_bi_string_prototype_substr(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_SECTION_B */
DUK_INTERNAL duk_ret_t duk_bi_string_prototype_slice(duk_context *ctx) {
duk_hstring *h;
duk_int_t start_pos, end_pos;
duk_int_t len;
h = duk_push_this_coercible_to_string(ctx);
DUK_ASSERT(h != NULL);
len = (duk_int_t) DUK_HSTRING_GET_CHARLEN(h);
/* [ start end str ] */
start_pos = duk_to_int_clamped(ctx, 0, -len, len);
if (start_pos < 0) {
start_pos = len + start_pos;
}
if (duk_is_undefined(ctx, 1)) {
end_pos = len;
} else {
end_pos = duk_to_int_clamped(ctx, 1, -len, len);
if (end_pos < 0) {
end_pos = len + end_pos;
}
}
DUK_ASSERT(start_pos >= 0 && start_pos <= len);
DUK_ASSERT(end_pos >= 0 && end_pos <= len);
if (end_pos < start_pos) {
end_pos = start_pos;
}
DUK_ASSERT(end_pos >= start_pos);
duk_substring(ctx, -1, (duk_size_t) start_pos, (duk_size_t) end_pos);
return 1;
}
/*
* Case conversion
*/
DUK_INTERNAL duk_ret_t duk_bi_string_prototype_caseconv_shared(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_small_int_t uppercase = duk_get_current_magic(ctx);
(void) duk_push_this_coercible_to_string(ctx);
duk_unicode_case_convert_string(thr, (duk_bool_t) uppercase);
return 1;
}
/*
* indexOf() and lastIndexOf()
*/
DUK_INTERNAL duk_ret_t duk_bi_string_prototype_indexof_shared(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hstring *h_this;
duk_hstring *h_search;
duk_int_t clen_this;
duk_int_t cpos;
duk_int_t bpos;
const duk_uint8_t *p_start, *p_end, *p;
const duk_uint8_t *q_start;
duk_int_t q_blen;
duk_uint8_t firstbyte;
duk_uint8_t t;
duk_small_int_t is_lastindexof = duk_get_current_magic(ctx); /* 0=indexOf, 1=lastIndexOf */
h_this = duk_push_this_coercible_to_string(ctx);
DUK_ASSERT(h_this != NULL);
clen_this = (duk_int_t) DUK_HSTRING_GET_CHARLEN(h_this);
h_search = duk_to_hstring(ctx, 0);
DUK_ASSERT(h_search != NULL);
q_start = DUK_HSTRING_GET_DATA(h_search);
q_blen = (duk_int_t) DUK_HSTRING_GET_BYTELEN(h_search);
duk_to_number(ctx, 1);
if (duk_is_nan(ctx, 1) && is_lastindexof) {
/* indexOf: NaN should cause pos to be zero.
* lastIndexOf: NaN should cause pos to be +Infinity
* (and later be clamped to len).
*/
cpos = clen_this;
} else {
cpos = duk_to_int_clamped(ctx, 1, 0, clen_this);
}
/* Empty searchstring always matches; cpos must be clamped here.
* (If q_blen were < 0 due to clamped coercion, it would also be
* caught here.)
*/
if (q_blen <= 0) {
duk_push_int(ctx, cpos);
return 1;
}
DUK_ASSERT(q_blen > 0);
bpos = (duk_int_t) duk_heap_strcache_offset_char2byte(thr, h_this, (duk_uint32_t) cpos);
p_start = DUK_HSTRING_GET_DATA(h_this);
p_end = p_start + DUK_HSTRING_GET_BYTELEN(h_this);
p = p_start + bpos;
/* This loop is optimized for size. For speed, there should be
* two separate loops, and we should ensure that memcmp() can be
* used without an extra "will searchstring fit" check. Doing
* the preconditioning for 'p' and 'p_end' is easy but cpos
* must be updated if 'p' is wound back (backward scanning).
*/
firstbyte = q_start[0]; /* leading byte of match string */
while (p <= p_end && p >= p_start) {
t = *p;
/* For Ecmascript strings, this check can only match for
* initial UTF-8 bytes (not continuation bytes). For other
* strings all bets are off.
*/
if ((t == firstbyte) && ((duk_size_t) (p_end - p) >= (duk_size_t) q_blen)) {
DUK_ASSERT(q_blen > 0); /* no issues with memcmp() zero size, even if broken */
if (DUK_MEMCMP((const void *) p, (const void *) q_start, (size_t) q_blen) == 0) {
duk_push_int(ctx, cpos);
return 1;
}
}
/* track cpos while scanning */
if (is_lastindexof) {
/* when going backwards, we decrement cpos 'early';
* 'p' may point to a continuation byte of the char
* at offset 'cpos', but that's OK because we'll
* backtrack all the way to the initial byte.
*/
if ((t & 0xc0) != 0x80) {
cpos--;
}
p--;
} else {
if ((t & 0xc0) != 0x80) {
cpos++;
}
p++;
}
}
/* Not found. Empty string case is handled specially above. */
duk_push_int(ctx, -1);
return 1;
}
/*
* replace()
*/
/* XXX: the current implementation works but is quite clunky; it compiles
* to almost 1,4kB of x86 code so it needs to be simplified (better approach,
* shared helpers, etc). Some ideas for refactoring:
*
* - a primitive to convert a string into a regexp matcher (reduces matching
* code at the cost of making matching much slower)
* - use replace() as a basic helper for match() and split(), which are both
* much simpler
* - API call to get_prop and to_boolean
*/
DUK_INTERNAL duk_ret_t duk_bi_string_prototype_replace(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hstring *h_input;
duk_hstring *h_match;
duk_hstring *h_search;
duk_hobject *h_re;
duk_bufwriter_ctx bw_alloc;
duk_bufwriter_ctx *bw;
#ifdef DUK_USE_REGEXP_SUPPORT
duk_bool_t is_regexp;
duk_bool_t is_global;
#endif
duk_bool_t is_repl_func;
duk_uint32_t match_start_coff, match_start_boff;
#ifdef DUK_USE_REGEXP_SUPPORT
duk_int_t match_caps;
#endif
duk_uint32_t prev_match_end_boff;
const duk_uint8_t *r_start, *r_end, *r; /* repl string scan */
duk_size_t tmp_sz;
DUK_ASSERT_TOP(ctx, 2);
h_input = duk_push_this_coercible_to_string(ctx);
DUK_ASSERT(h_input != NULL);
bw = &bw_alloc;
DUK_BW_INIT_PUSHBUF(thr, bw, DUK_HSTRING_GET_BYTELEN(h_input)); /* input size is good output starting point */
DUK_ASSERT_TOP(ctx, 4);
/* stack[0] = search value
* stack[1] = replace value
* stack[2] = input string
* stack[3] = result buffer
*/
h_re = duk_get_hobject_with_class(ctx, 0, DUK_HOBJECT_CLASS_REGEXP);
if (h_re) {
#ifdef DUK_USE_REGEXP_SUPPORT
is_regexp = 1;
is_global = duk_get_prop_stridx_boolean(ctx, 0, DUK_STRIDX_GLOBAL, NULL);
if (is_global) {
/* start match from beginning */
duk_push_int(ctx, 0);
duk_put_prop_stridx(ctx, 0, DUK_STRIDX_LAST_INDEX);
}
#else /* DUK_USE_REGEXP_SUPPORT */
return DUK_RET_UNSUPPORTED_ERROR;
#endif /* DUK_USE_REGEXP_SUPPORT */
} else {
duk_to_string(ctx, 0);
#ifdef DUK_USE_REGEXP_SUPPORT
is_regexp = 0;
is_global = 0;
#endif
}
if (duk_is_function(ctx, 1)) {
is_repl_func = 1;
r_start = NULL;
r_end = NULL;
} else {
duk_hstring *h_repl;
is_repl_func = 0;
h_repl = duk_to_hstring(ctx, 1);
DUK_ASSERT(h_repl != NULL);
r_start = DUK_HSTRING_GET_DATA(h_repl);
r_end = r_start + DUK_HSTRING_GET_BYTELEN(h_repl);
}
prev_match_end_boff = 0;
for (;;) {
/*
* If matching with a regexp:
* - non-global RegExp: lastIndex not touched on a match, zeroed
* on a non-match
* - global RegExp: on match, lastIndex will be updated by regexp
* executor to point to next char after the matching part (so that
* characters in the matching part are not matched again)
*
* If matching with a string:
* - always non-global match, find first occurrence
*
* We need:
* - The character offset of start-of-match for the replacer function
* - The byte offsets for start-of-match and end-of-match to implement
* the replacement values $&, $`, and $', and to copy non-matching
* input string portions (including header and trailer) verbatim.
*
* NOTE: the E5.1 specification is a bit vague how the RegExp should
* behave in the replacement process; e.g. is matching done first for
* all matches (in the global RegExp case) before any replacer calls
* are made? See: test-bi-string-proto-replace.js for discussion.
*/
DUK_ASSERT_TOP(ctx, 4);
#ifdef DUK_USE_REGEXP_SUPPORT
if (is_regexp) {
duk_dup(ctx, 0);
duk_dup(ctx, 2);
duk_regexp_match(thr); /* [ ... regexp input ] -> [ res_obj ] */
if (!duk_is_object(ctx, -1)) {
duk_pop(ctx);
break;
}
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INDEX);
DUK_ASSERT(duk_is_number(ctx, -1));
match_start_coff = duk_get_int(ctx, -1);
duk_pop(ctx);
duk_get_prop_index(ctx, -1, 0);
DUK_ASSERT(duk_is_string(ctx, -1));
h_match = duk_get_hstring(ctx, -1);
DUK_ASSERT(h_match != NULL);
duk_pop(ctx); /* h_match is borrowed, remains reachable through match_obj */
if (DUK_HSTRING_GET_BYTELEN(h_match) == 0) {
/* This should be equivalent to match() algorithm step 8.f.iii.2:
* detect an empty match and allow it, but don't allow it twice.
*/
duk_uint32_t last_index;
duk_get_prop_stridx(ctx, 0, DUK_STRIDX_LAST_INDEX);
last_index = (duk_uint32_t) duk_get_uint(ctx, -1);
DUK_DDD(DUK_DDDPRINT("empty match, bump lastIndex: %ld -> %ld",
(long) last_index, (long) (last_index + 1)));
duk_pop(ctx);
duk_push_int(ctx, last_index + 1);
duk_put_prop_stridx(ctx, 0, DUK_STRIDX_LAST_INDEX);
}
DUK_ASSERT(duk_get_length(ctx, -1) <= DUK_INT_MAX); /* string limits */
match_caps = (duk_int_t) duk_get_length(ctx, -1);
} else {
#else /* DUK_USE_REGEXP_SUPPORT */
{ /* unconditionally */
#endif /* DUK_USE_REGEXP_SUPPORT */
const duk_uint8_t *p_start, *p_end, *p; /* input string scan */
const duk_uint8_t *q_start; /* match string */
duk_size_t q_blen;
#ifdef DUK_USE_REGEXP_SUPPORT
DUK_ASSERT(!is_global); /* single match always */
#endif
p_start = DUK_HSTRING_GET_DATA(h_input);
p_end = p_start + DUK_HSTRING_GET_BYTELEN(h_input);
p = p_start;
h_search = duk_get_hstring(ctx, 0);
DUK_ASSERT(h_search != NULL);
q_start = DUK_HSTRING_GET_DATA(h_search);
q_blen = (duk_size_t) DUK_HSTRING_GET_BYTELEN(h_search);
p_end -= q_blen; /* ensure full memcmp() fits in while */
match_start_coff = 0;
while (p <= p_end) {
DUK_ASSERT(p + q_blen <= DUK_HSTRING_GET_DATA(h_input) + DUK_HSTRING_GET_BYTELEN(h_input));
if (DUK_MEMCMP((const void *) p, (const void *) q_start, (size_t) q_blen) == 0) {
duk_dup(ctx, 0);
h_match = duk_get_hstring(ctx, -1);
DUK_ASSERT(h_match != NULL);
#ifdef DUK_USE_REGEXP_SUPPORT
match_caps = 0;
#endif
goto found;
}
/* track utf-8 non-continuation bytes */
if ((p[0] & 0xc0) != 0x80) {
match_start_coff++;
}
p++;
}
/* not found */
break;
}
found:
/* stack[0] = search value
* stack[1] = replace value
* stack[2] = input string
* stack[3] = result buffer
* stack[4] = regexp match OR match string
*/
match_start_boff = duk_heap_strcache_offset_char2byte(thr, h_input, match_start_coff);
tmp_sz = (duk_size_t) (match_start_boff - prev_match_end_boff);
DUK_BW_WRITE_ENSURE_BYTES(thr, bw, DUK_HSTRING_GET_DATA(h_input) + prev_match_end_boff, tmp_sz);
prev_match_end_boff = match_start_boff + DUK_HSTRING_GET_BYTELEN(h_match);
if (is_repl_func) {
duk_idx_t idx_args;
duk_hstring *h_repl;
/* regexp res_obj is at index 4 */
duk_dup(ctx, 1);
idx_args = duk_get_top(ctx);
#ifdef DUK_USE_REGEXP_SUPPORT
if (is_regexp) {
duk_int_t idx;
duk_require_stack(ctx, match_caps + 2);
for (idx = 0; idx < match_caps; idx++) {
/* match followed by capture(s) */
duk_get_prop_index(ctx, 4, idx);
}
} else {
#else /* DUK_USE_REGEXP_SUPPORT */
{ /* unconditionally */
#endif /* DUK_USE_REGEXP_SUPPORT */
/* match == search string, by definition */
duk_dup(ctx, 0);
}
duk_push_int(ctx, match_start_coff);
duk_dup(ctx, 2);
/* [ ... replacer match [captures] match_char_offset input ] */
duk_call(ctx, duk_get_top(ctx) - idx_args);
h_repl = duk_to_hstring(ctx, -1); /* -> [ ... repl_value ] */
DUK_ASSERT(h_repl != NULL);
DUK_BW_WRITE_ENSURE_HSTRING(thr, bw, h_repl);
duk_pop(ctx); /* repl_value */
} else {
r = r_start;
while (r < r_end) {
duk_int_t ch1;
duk_int_t ch2;
#ifdef DUK_USE_REGEXP_SUPPORT
duk_int_t ch3;
#endif
duk_size_t left;
ch1 = *r++;
if (ch1 != DUK_ASC_DOLLAR) {
goto repl_write;
}
left = r_end - r;
if (left <= 0) {
goto repl_write;
}
ch2 = r[0];
switch ((int) ch2) {
case DUK_ASC_DOLLAR: {
ch1 = (1 << 8) + DUK_ASC_DOLLAR;
goto repl_write;
}
case DUK_ASC_AMP: {
DUK_BW_WRITE_ENSURE_HSTRING(thr, bw, h_match);
r++;
continue;
}
case DUK_ASC_GRAVE: {
tmp_sz = (duk_size_t) match_start_boff;
DUK_BW_WRITE_ENSURE_BYTES(thr, bw, DUK_HSTRING_GET_DATA(h_input), tmp_sz);
r++;
continue;
}
case DUK_ASC_SINGLEQUOTE: {
duk_uint32_t match_end_boff;
/* Use match charlen instead of bytelen, just in case the input and
* match codepoint encodings would have different lengths.
*/
match_end_boff = duk_heap_strcache_offset_char2byte(thr,
h_input,
match_start_coff + DUK_HSTRING_GET_CHARLEN(h_match));
tmp_sz = (duk_size_t) (DUK_HSTRING_GET_BYTELEN(h_input) - match_end_boff);
DUK_BW_WRITE_ENSURE_BYTES(thr, bw, DUK_HSTRING_GET_DATA(h_input) + match_end_boff, tmp_sz);
r++;
continue;
}
default: {
#ifdef DUK_USE_REGEXP_SUPPORT
duk_int_t capnum, captmp, capadv;
/* XXX: optional check, match_caps is zero if no regexp,
* so dollar will be interpreted literally anyway.
*/
if (!is_regexp) {
goto repl_write;
}
if (!(ch2 >= DUK_ASC_0 && ch2 <= DUK_ASC_9)) {
goto repl_write;
}
capnum = ch2 - DUK_ASC_0;
capadv = 1;
if (left >= 2) {
ch3 = r[1];
if (ch3 >= DUK_ASC_0 && ch3 <= DUK_ASC_9) {
captmp = capnum * 10 + (ch3 - DUK_ASC_0);
if (captmp < match_caps) {
capnum = captmp;
capadv = 2;
}
}
}
if (capnum > 0 && capnum < match_caps) {
DUK_ASSERT(is_regexp != 0); /* match_caps == 0 without regexps */
/* regexp res_obj is at offset 4 */
duk_get_prop_index(ctx, 4, (duk_uarridx_t) capnum);
if (duk_is_string(ctx, -1)) {
duk_hstring *h_tmp_str;
h_tmp_str = duk_get_hstring(ctx, -1);
DUK_ASSERT(h_tmp_str != NULL);
DUK_BW_WRITE_ENSURE_HSTRING(thr, bw, h_tmp_str);
} else {
/* undefined -> skip (replaced with empty) */
}
duk_pop(ctx);
r += capadv;
continue;
} else {
goto repl_write;
}
#else /* DUK_USE_REGEXP_SUPPORT */
goto repl_write; /* unconditionally */
#endif /* DUK_USE_REGEXP_SUPPORT */
} /* default case */
} /* switch (ch2) */
repl_write:
/* ch1 = (r_increment << 8) + byte */
DUK_BW_WRITE_ENSURE_U8(thr, bw, (duk_uint8_t) (ch1 & 0xff));
r += ch1 >> 8;
} /* while repl */
} /* if (is_repl_func) */
duk_pop(ctx); /* pop regexp res_obj or match string */
#ifdef DUK_USE_REGEXP_SUPPORT
if (!is_global) {
#else
{ /* unconditionally; is_global==0 */
#endif
break;
}
}
/* trailer */
tmp_sz = (duk_size_t) (DUK_HSTRING_GET_BYTELEN(h_input) - prev_match_end_boff);
DUK_BW_WRITE_ENSURE_BYTES(thr, bw, DUK_HSTRING_GET_DATA(h_input) + prev_match_end_boff, tmp_sz);
DUK_ASSERT_TOP(ctx, 4);
DUK_BW_COMPACT(thr, bw);
duk_to_string(ctx, -1);
return 1;
}
/*
* split()
*/
/* XXX: very messy now, but works; clean up, remove unused variables (nomimally
* used so compiler doesn't complain).
*/
DUK_INTERNAL duk_ret_t duk_bi_string_prototype_split(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hstring *h_input;
duk_hstring *h_sep;
duk_uint32_t limit;
duk_uint32_t arr_idx;
#ifdef DUK_USE_REGEXP_SUPPORT
duk_bool_t is_regexp;
#endif
duk_bool_t matched; /* set to 1 if any match exists (needed for empty input special case) */
duk_uint32_t prev_match_end_coff, prev_match_end_boff;
duk_uint32_t match_start_boff, match_start_coff;
duk_uint32_t match_end_boff, match_end_coff;
DUK_UNREF(thr);
h_input = duk_push_this_coercible_to_string(ctx);
DUK_ASSERT(h_input != NULL);
duk_push_array(ctx);
if (duk_is_undefined(ctx, 1)) {
limit = 0xffffffffUL;
} else {
limit = duk_to_uint32(ctx, 1);
}
if (limit == 0) {
return 1;
}
/* If the separator is a RegExp, make a "clone" of it. The specification
* algorithm calls [[Match]] directly for specific indices; we emulate this
* by tweaking lastIndex and using a "force global" variant of duk_regexp_match()
* which will use global-style matching even when the RegExp itself is non-global.
*/
if (duk_is_undefined(ctx, 0)) {
/* The spec algorithm first does "R = ToString(separator)" before checking
* whether separator is undefined. Since this is side effect free, we can
* skip the ToString() here.
*/
duk_dup(ctx, 2);
duk_put_prop_index(ctx, 3, 0);
return 1;
} else if (duk_get_hobject_with_class(ctx, 0, DUK_HOBJECT_CLASS_REGEXP) != NULL) {
#ifdef DUK_USE_REGEXP_SUPPORT
duk_push_hobject_bidx(ctx, DUK_BIDX_REGEXP_CONSTRUCTOR);
duk_dup(ctx, 0);
duk_new(ctx, 1); /* [ ... RegExp val ] -> [ ... res ] */
duk_replace(ctx, 0);
/* lastIndex is initialized to zero by new RegExp() */
is_regexp = 1;
#else
return DUK_RET_UNSUPPORTED_ERROR;
#endif
} else {
duk_to_string(ctx, 0);
#ifdef DUK_USE_REGEXP_SUPPORT
is_regexp = 0;
#endif
}
/* stack[0] = separator (string or regexp)
* stack[1] = limit
* stack[2] = input string
* stack[3] = result array
*/
prev_match_end_boff = 0;
prev_match_end_coff = 0;
arr_idx = 0;
matched = 0;
for (;;) {
/*
* The specification uses RegExp [[Match]] to attempt match at specific
* offsets. We don't have such a primitive, so we use an actual RegExp
* and tweak lastIndex. Since the RegExp may be non-global, we use a
* special variant which forces global-like behavior for matching.
*/
DUK_ASSERT_TOP(ctx, 4);
#ifdef DUK_USE_REGEXP_SUPPORT
if (is_regexp) {
duk_dup(ctx, 0);
duk_dup(ctx, 2);
duk_regexp_match_force_global(thr); /* [ ... regexp input ] -> [ res_obj ] */
if (!duk_is_object(ctx, -1)) {
duk_pop(ctx);
break;
}
matched = 1;
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INDEX);
DUK_ASSERT(duk_is_number(ctx, -1));
match_start_coff = duk_get_int(ctx, -1);
match_start_boff = duk_heap_strcache_offset_char2byte(thr, h_input, match_start_coff);
duk_pop(ctx);
if (match_start_coff == DUK_HSTRING_GET_CHARLEN(h_input)) {
/* don't allow an empty match at the end of the string */
duk_pop(ctx);
break;
}
duk_get_prop_stridx(ctx, 0, DUK_STRIDX_LAST_INDEX);
DUK_ASSERT(duk_is_number(ctx, -1));
match_end_coff = duk_get_int(ctx, -1);
match_end_boff = duk_heap_strcache_offset_char2byte(thr, h_input, match_end_coff);
duk_pop(ctx);
/* empty match -> bump and continue */
if (prev_match_end_boff == match_end_boff) {
duk_push_int(ctx, match_end_coff + 1);
duk_put_prop_stridx(ctx, 0, DUK_STRIDX_LAST_INDEX);
duk_pop(ctx);
continue;
}
} else {
#else /* DUK_USE_REGEXP_SUPPORT */
{ /* unconditionally */
#endif /* DUK_USE_REGEXP_SUPPORT */
const duk_uint8_t *p_start, *p_end, *p; /* input string scan */
const duk_uint8_t *q_start; /* match string */
duk_size_t q_blen, q_clen;
p_start = DUK_HSTRING_GET_DATA(h_input);
p_end = p_start + DUK_HSTRING_GET_BYTELEN(h_input);
p = p_start + prev_match_end_boff;
h_sep = duk_get_hstring(ctx, 0);
DUK_ASSERT(h_sep != NULL);
q_start = DUK_HSTRING_GET_DATA(h_sep);
q_blen = (duk_size_t) DUK_HSTRING_GET_BYTELEN(h_sep);
q_clen = (duk_size_t) DUK_HSTRING_GET_CHARLEN(h_sep);
p_end -= q_blen; /* ensure full memcmp() fits in while */
match_start_coff = prev_match_end_coff;
if (q_blen == 0) {
/* Handle empty separator case: it will always match, and always
* triggers the check in step 13.c.iii initially. Note that we
* must skip to either end of string or start of first codepoint,
* skipping over any continuation bytes!
*
* Don't allow an empty string to match at the end of the input.
*/
matched = 1; /* empty separator can always match */
match_start_coff++;
p++;
while (p < p_end) {
if ((p[0] & 0xc0) != 0x80) {
goto found;
}
p++;
}
goto not_found;
}
DUK_ASSERT(q_blen > 0 && q_clen > 0);
while (p <= p_end) {
DUK_ASSERT(p + q_blen <= DUK_HSTRING_GET_DATA(h_input) + DUK_HSTRING_GET_BYTELEN(h_input));
DUK_ASSERT(q_blen > 0); /* no issues with empty memcmp() */
if (DUK_MEMCMP((const void *) p, (const void *) q_start, (size_t) q_blen) == 0) {
/* never an empty match, so step 13.c.iii can't be triggered */
goto found;
}
/* track utf-8 non-continuation bytes */
if ((p[0] & 0xc0) != 0x80) {
match_start_coff++;
}
p++;
}
not_found:
/* not found */
break;
found:
matched = 1;
match_start_boff = (duk_uint32_t) (p - p_start);
match_end_coff = (duk_uint32_t) (match_start_coff + q_clen); /* constrained by string length */
match_end_boff = (duk_uint32_t) (match_start_boff + q_blen); /* ditto */
/* empty match (may happen with empty separator) -> bump and continue */
if (prev_match_end_boff == match_end_boff) {
prev_match_end_boff++;
prev_match_end_coff++;
continue;
}
} /* if (is_regexp) */
/* stack[0] = separator (string or regexp)
* stack[1] = limit
* stack[2] = input string
* stack[3] = result array
* stack[4] = regexp res_obj (if is_regexp)
*/
DUK_DDD(DUK_DDDPRINT("split; match_start b=%ld,c=%ld, match_end b=%ld,c=%ld, prev_end b=%ld,c=%ld",
(long) match_start_boff, (long) match_start_coff,
(long) match_end_boff, (long) match_end_coff,
(long) prev_match_end_boff, (long) prev_match_end_coff));
duk_push_lstring(ctx,
(const char *) (DUK_HSTRING_GET_DATA(h_input) + prev_match_end_boff),
(duk_size_t) (match_start_boff - prev_match_end_boff));
duk_put_prop_index(ctx, 3, arr_idx);
arr_idx++;
if (arr_idx >= limit) {
goto hit_limit;
}
#ifdef DUK_USE_REGEXP_SUPPORT
if (is_regexp) {
duk_size_t i, len;
len = duk_get_length(ctx, 4);
for (i = 1; i < len; i++) {
DUK_ASSERT(i <= DUK_UARRIDX_MAX); /* cannot have >4G captures */
duk_get_prop_index(ctx, 4, (duk_uarridx_t) i);
duk_put_prop_index(ctx, 3, arr_idx);
arr_idx++;
if (arr_idx >= limit) {
goto hit_limit;
}
}
duk_pop(ctx);
/* lastIndex already set up for next match */
} else {
#else /* DUK_USE_REGEXP_SUPPORT */
{ /* unconditionally */
#endif /* DUK_USE_REGEXP_SUPPORT */
/* no action */
}
prev_match_end_boff = match_end_boff;
prev_match_end_coff = match_end_coff;
continue;
} /* for */
/* Combined step 11 (empty string special case) and 14-15. */
DUK_DDD(DUK_DDDPRINT("split trailer; prev_end b=%ld,c=%ld",
(long) prev_match_end_boff, (long) prev_match_end_coff));
if (DUK_HSTRING_GET_CHARLEN(h_input) > 0 || !matched) {
/* Add trailer if:
* a) non-empty input
* b) empty input and no (zero size) match found (step 11)
*/
duk_push_lstring(ctx,
(const char *) DUK_HSTRING_GET_DATA(h_input) + prev_match_end_boff,
(duk_size_t) (DUK_HSTRING_GET_BYTELEN(h_input) - prev_match_end_boff));
duk_put_prop_index(ctx, 3, arr_idx);
/* No arr_idx update or limit check */
}
return 1;
hit_limit:
#ifdef DUK_USE_REGEXP_SUPPORT
if (is_regexp) {
duk_pop(ctx);
}
#endif
return 1;
}
/*
* Various
*/
#ifdef DUK_USE_REGEXP_SUPPORT
DUK_LOCAL void duk__to_regexp_helper(duk_context *ctx, duk_idx_t index, duk_bool_t force_new) {
duk_hobject *h;
/* Shared helper for match() steps 3-4, search() steps 3-4. */
DUK_ASSERT(index >= 0);
if (force_new) {
goto do_new;
}
h = duk_get_hobject_with_class(ctx, index, DUK_HOBJECT_CLASS_REGEXP);
if (!h) {
goto do_new;
}
return;
do_new:
duk_push_hobject_bidx(ctx, DUK_BIDX_REGEXP_CONSTRUCTOR);
duk_dup(ctx, index);
duk_new(ctx, 1); /* [ ... RegExp val ] -> [ ... res ] */
duk_replace(ctx, index);
}
#endif /* DUK_USE_REGEXP_SUPPORT */
#ifdef DUK_USE_REGEXP_SUPPORT
DUK_INTERNAL duk_ret_t duk_bi_string_prototype_search(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
/* Easiest way to implement the search required by the specification
* is to do a RegExp test() with lastIndex forced to zero. To avoid
* side effects on the argument, "clone" the RegExp if a RegExp was
* given as input.
*
* The global flag of the RegExp should be ignored; setting lastIndex
* to zero (which happens when "cloning" the RegExp) should have an
* equivalent effect.
*/
DUK_ASSERT_TOP(ctx, 1);
(void) duk_push_this_coercible_to_string(ctx); /* at index 1 */
duk__to_regexp_helper(ctx, 0 /*index*/, 1 /*force_new*/);
/* stack[0] = regexp
* stack[1] = string
*/
/* Avoid using RegExp.prototype methods, as they're writable and
* configurable and may have been changed.
*/
duk_dup(ctx, 0);
duk_dup(ctx, 1); /* [ ... re_obj input ] */
duk_regexp_match(thr); /* -> [ ... res_obj ] */
if (!duk_is_object(ctx, -1)) {
duk_push_int(ctx, -1);
return 1;
}
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INDEX);
DUK_ASSERT(duk_is_number(ctx, -1));
return 1;
}
#else /* DUK_USE_REGEXP_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_string_prototype_search(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_REGEXP_SUPPORT */
#ifdef DUK_USE_REGEXP_SUPPORT
DUK_INTERNAL duk_ret_t duk_bi_string_prototype_match(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_bool_t global;
duk_int_t prev_last_index;
duk_int_t this_index;
duk_int_t arr_idx;
DUK_ASSERT_TOP(ctx, 1);
(void) duk_push_this_coercible_to_string(ctx);
duk__to_regexp_helper(ctx, 0 /*index*/, 0 /*force_new*/);
global = duk_get_prop_stridx_boolean(ctx, 0, DUK_STRIDX_GLOBAL, NULL);
DUK_ASSERT_TOP(ctx, 2);
/* stack[0] = regexp
* stack[1] = string
*/
if (!global) {
duk_regexp_match(thr); /* -> [ res_obj ] */
return 1; /* return 'res_obj' */
}
/* Global case is more complex. */
/* [ regexp string ] */
duk_push_int(ctx, 0);
duk_put_prop_stridx(ctx, 0, DUK_STRIDX_LAST_INDEX);
duk_push_array(ctx);
/* [ regexp string res_arr ] */
prev_last_index = 0;
arr_idx = 0;
for (;;) {
DUK_ASSERT_TOP(ctx, 3);
duk_dup(ctx, 0);
duk_dup(ctx, 1);
duk_regexp_match(thr); /* -> [ ... regexp string ] -> [ ... res_obj ] */
if (!duk_is_object(ctx, -1)) {
duk_pop(ctx);
break;
}
duk_get_prop_stridx(ctx, 0, DUK_STRIDX_LAST_INDEX);
DUK_ASSERT(duk_is_number(ctx, -1));
this_index = duk_get_int(ctx, -1);
duk_pop(ctx);
if (this_index == prev_last_index) {
this_index++;
duk_push_int(ctx, this_index);
duk_put_prop_stridx(ctx, 0, DUK_STRIDX_LAST_INDEX);
}
prev_last_index = this_index;
duk_get_prop_index(ctx, -1, 0); /* match string */
duk_put_prop_index(ctx, 2, arr_idx);
arr_idx++;
duk_pop(ctx); /* res_obj */
}
if (arr_idx == 0) {
duk_push_null(ctx);
}
return 1; /* return 'res_arr' or 'null' */
}
#else /* DUK_USE_REGEXP_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_string_prototype_match(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_UNSUPPORTED_ERROR;
}
#endif /* DUK_USE_REGEXP_SUPPORT */
DUK_INTERNAL duk_ret_t duk_bi_string_prototype_concat(duk_context *ctx) {
/* duk_concat() coerces arguments with ToString() in correct order */
(void) duk_push_this_coercible_to_string(ctx);
duk_insert(ctx, 0); /* this is relatively expensive */
duk_concat(ctx, duk_get_top(ctx));
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_string_prototype_trim(duk_context *ctx) {
DUK_ASSERT_TOP(ctx, 0);
(void) duk_push_this_coercible_to_string(ctx);
duk_trim(ctx, 0);
DUK_ASSERT_TOP(ctx, 1);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_string_prototype_locale_compare(duk_context *ctx) {
duk_hstring *h1;
duk_hstring *h2;
duk_size_t h1_len, h2_len, prefix_len;
duk_small_int_t ret = 0;
duk_small_int_t rc;
/* The current implementation of localeCompare() is simply a codepoint
* by codepoint comparison, implemented with a simple string compare
* because UTF-8 should preserve codepoint ordering (assuming valid
* shortest UTF-8 encoding).
*
* The specification requires that the return value must be related
* to the sort order: e.g. negative means that 'this' comes before
* 'that' in sort order. We assume an ascending sort order.
*/
/* XXX: could share code with duk_js_ops.c, duk_js_compare_helper */
h1 = duk_push_this_coercible_to_string(ctx);
DUK_ASSERT(h1 != NULL);
h2 = duk_to_hstring(ctx, 0);
DUK_ASSERT(h2 != NULL);
h1_len = (duk_size_t) DUK_HSTRING_GET_BYTELEN(h1);
h2_len = (duk_size_t) DUK_HSTRING_GET_BYTELEN(h2);
prefix_len = (h1_len <= h2_len ? h1_len : h2_len);
/* Zero size compare not an issue with DUK_MEMCMP. */
rc = (duk_small_int_t) DUK_MEMCMP((const void *) DUK_HSTRING_GET_DATA(h1),
(const void *) DUK_HSTRING_GET_DATA(h2),
(size_t) prefix_len);
if (rc < 0) {
ret = -1;
goto done;
} else if (rc > 0) {
ret = 1;
goto done;
}
/* prefix matches, lengths matter now */
if (h1_len > h2_len) {
ret = 1;
goto done;
} else if (h1_len == h2_len) {
DUK_ASSERT(ret == 0);
goto done;
}
ret = -1;
goto done;
done:
duk_push_int(ctx, (duk_int_t) ret);
return 1;
}
#line 1 "duk_bi_thread.c"
/*
* Thread builtins
*/
/* include removed: duk_internal.h */
/*
* Constructor
*/
DUK_INTERNAL duk_ret_t duk_bi_thread_constructor(duk_context *ctx) {
duk_hthread *new_thr;
duk_hobject *func;
/* XXX: need a duk_require_func_or_lfunc_coerce() */
if (!duk_is_callable(ctx, 0)) {
return DUK_RET_TYPE_ERROR;
}
func = duk_require_hobject_or_lfunc_coerce(ctx, 0);
DUK_ASSERT(func != NULL);
duk_push_thread(ctx);
new_thr = (duk_hthread *) duk_get_hobject(ctx, -1);
DUK_ASSERT(new_thr != NULL);
new_thr->state = DUK_HTHREAD_STATE_INACTIVE;
/* push initial function call to new thread stack; this is
* picked up by resume().
*/
duk_push_hobject((duk_context *) new_thr, func);
return 1; /* return thread */
}
/*
* Resume a thread.
*
* The thread must be in resumable state, either (a) new thread which hasn't
* yet started, or (b) a thread which has previously yielded. This method
* must be called from an Ecmascript function.
*
* Args:
* - thread
* - value
* - isError (defaults to false)
*
* Note: yield and resume handling is currently asymmetric.
*/
DUK_INTERNAL duk_ret_t duk_bi_thread_resume(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hthread *thr_resume;
duk_tval *tv;
duk_hobject *func;
duk_hobject *caller_func;
duk_small_int_t is_error;
DUK_DDD(DUK_DDDPRINT("Duktape.Thread.resume(): thread=%!T, value=%!T, is_error=%!T",
(duk_tval *) duk_get_tval(ctx, 0),
(duk_tval *) duk_get_tval(ctx, 1),
(duk_tval *) duk_get_tval(ctx, 2)));
DUK_ASSERT(thr->state == DUK_HTHREAD_STATE_RUNNING);
DUK_ASSERT(thr->heap->curr_thread == thr);
thr_resume = duk_require_hthread(ctx, 0);
is_error = (duk_small_int_t) duk_to_boolean(ctx, 2);
duk_set_top(ctx, 2);
/* [ thread value ] */
/*
* Thread state and calling context checks
*/
if (thr->callstack_top < 2) {
DUK_DD(DUK_DDPRINT("resume state invalid: callstack should contain at least 2 entries (caller and Duktape.Thread.resume)"));
goto state_error;
}
DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 1) != NULL); /* us */
DUK_ASSERT(DUK_HOBJECT_IS_NATIVEFUNCTION(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 1)));
DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 2) != NULL); /* caller */
caller_func = DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 2);
if (!DUK_HOBJECT_IS_COMPILEDFUNCTION(caller_func)) {
DUK_DD(DUK_DDPRINT("resume state invalid: caller must be Ecmascript code"));
goto state_error;
}
/* Note: there is no requirement that: 'thr->callstack_preventcount == 1'
* like for yield.
*/
if (thr_resume->state != DUK_HTHREAD_STATE_INACTIVE &&
thr_resume->state != DUK_HTHREAD_STATE_YIELDED) {
DUK_DD(DUK_DDPRINT("resume state invalid: target thread must be INACTIVE or YIELDED"));
goto state_error;
}
DUK_ASSERT(thr_resume->state == DUK_HTHREAD_STATE_INACTIVE ||
thr_resume->state == DUK_HTHREAD_STATE_YIELDED);
/* Further state-dependent pre-checks */
if (thr_resume->state == DUK_HTHREAD_STATE_YIELDED) {
/* no pre-checks now, assume a previous yield() has left things in
* tip-top shape (longjmp handler will assert for these).
*/
} else {
DUK_ASSERT(thr_resume->state == DUK_HTHREAD_STATE_INACTIVE);
if ((thr_resume->callstack_top != 0) ||
(thr_resume->valstack_top - thr_resume->valstack != 1)) {
goto state_invalid_initial;
}
tv = &thr_resume->valstack_top[-1];
DUK_ASSERT(tv >= thr_resume->valstack && tv < thr_resume->valstack_top);
if (!DUK_TVAL_IS_OBJECT(tv)) {
goto state_invalid_initial;
}
func = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(func != NULL);
if (!DUK_HOBJECT_IS_COMPILEDFUNCTION(func)) {
/* Note: cannot be a bound function either right now,
* this would be easy to relax though.
*/
goto state_invalid_initial;
}
}
/*
* The error object has been augmented with a traceback and other
* info from its creation point -- usually another thread. The
* error handler is called here right before throwing, but it also
* runs in the resumer's thread. It might be nice to get a traceback
* from the resumee but this is not the case now.
*/
#if defined(DUK_USE_AUGMENT_ERROR_THROW)
if (is_error) {
DUK_ASSERT_TOP(ctx, 2); /* value (error) is at stack top */
duk_err_augment_error_throw(thr); /* in resumer's context */
}
#endif
#ifdef DUK_USE_DEBUG
if (is_error) {
DUK_DDD(DUK_DDDPRINT("RESUME ERROR: thread=%!T, value=%!T",
(duk_tval *) duk_get_tval(ctx, 0),
(duk_tval *) duk_get_tval(ctx, 1)));
} else if (thr_resume->state == DUK_HTHREAD_STATE_YIELDED) {
DUK_DDD(DUK_DDDPRINT("RESUME NORMAL: thread=%!T, value=%!T",
(duk_tval *) duk_get_tval(ctx, 0),
(duk_tval *) duk_get_tval(ctx, 1)));
} else {
DUK_DDD(DUK_DDDPRINT("RESUME INITIAL: thread=%!T, value=%!T",
(duk_tval *) duk_get_tval(ctx, 0),
(duk_tval *) duk_get_tval(ctx, 1)));
}
#endif
thr->heap->lj.type = DUK_LJ_TYPE_RESUME;
/* lj value2: thread */
DUK_ASSERT(thr->valstack_bottom < thr->valstack_top);
DUK_TVAL_SET_TVAL_UPDREF(thr, &thr->heap->lj.value2, &thr->valstack_bottom[0]); /* side effects */
/* lj value1: value */
DUK_ASSERT(thr->valstack_bottom + 1 < thr->valstack_top);
DUK_TVAL_SET_TVAL_UPDREF(thr, &thr->heap->lj.value1, &thr->valstack_bottom[1]); /* side effects */
DUK_TVAL_CHKFAST_INPLACE(&thr->heap->lj.value1);
thr->heap->lj.iserror = is_error;
DUK_ASSERT(thr->heap->lj.jmpbuf_ptr != NULL); /* call is from executor, so we know we have a jmpbuf */
duk_err_longjmp(thr); /* execution resumes in bytecode executor */
return 0; /* never here */
state_invalid_initial:
DUK_ERROR_TYPE(thr, "invalid initial thread state/stack");
return 0; /* never here */
state_error:
DUK_ERROR_TYPE(thr, "invalid state");
return 0; /* never here */
}
/*
* Yield the current thread.
*
* The thread must be in yieldable state: it must have a resumer, and there
* must not be any yield-preventing calls (native calls and constructor calls,
* currently) in the thread's call stack (otherwise a resume would not be
* possible later). This method must be called from an Ecmascript function.
*
* Args:
* - value
* - isError (defaults to false)
*
* Note: yield and resume handling is currently asymmetric.
*/
DUK_INTERNAL duk_ret_t duk_bi_thread_yield(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *caller_func;
duk_small_int_t is_error;
DUK_DDD(DUK_DDDPRINT("Duktape.Thread.yield(): value=%!T, is_error=%!T",
(duk_tval *) duk_get_tval(ctx, 0),
(duk_tval *) duk_get_tval(ctx, 1)));
DUK_ASSERT(thr->state == DUK_HTHREAD_STATE_RUNNING);
DUK_ASSERT(thr->heap->curr_thread == thr);
is_error = (duk_small_int_t) duk_to_boolean(ctx, 1);
duk_set_top(ctx, 1);
/* [ value ] */
/*
* Thread state and calling context checks
*/
if (!thr->resumer) {
DUK_DD(DUK_DDPRINT("yield state invalid: current thread must have a resumer"));
goto state_error;
}
DUK_ASSERT(thr->resumer->state == DUK_HTHREAD_STATE_RESUMED);
if (thr->callstack_top < 2) {
DUK_DD(DUK_DDPRINT("yield state invalid: callstack should contain at least 2 entries (caller and Duktape.Thread.yield)"));
goto state_error;
}
DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 1) != NULL); /* us */
DUK_ASSERT(DUK_HOBJECT_IS_NATIVEFUNCTION(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 1)));
DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 2) != NULL); /* caller */
caller_func = DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 2);
if (!DUK_HOBJECT_IS_COMPILEDFUNCTION(caller_func)) {
DUK_DD(DUK_DDPRINT("yield state invalid: caller must be Ecmascript code"));
goto state_error;
}
DUK_ASSERT(thr->callstack_preventcount >= 1); /* should never be zero, because we (Duktape.Thread.yield) are on the stack */
if (thr->callstack_preventcount != 1) {
/* Note: the only yield-preventing call is Duktape.Thread.yield(), hence check for 1, not 0 */
DUK_DD(DUK_DDPRINT("yield state invalid: there must be no yield-preventing calls in current thread callstack (preventcount is %ld)",
(long) thr->callstack_preventcount));
goto state_error;
}
/*
* The error object has been augmented with a traceback and other
* info from its creation point -- usually the current thread.
* The error handler, however, is called right before throwing
* and runs in the yielder's thread.
*/
#if defined(DUK_USE_AUGMENT_ERROR_THROW)
if (is_error) {
DUK_ASSERT_TOP(ctx, 1); /* value (error) is at stack top */
duk_err_augment_error_throw(thr); /* in yielder's context */
}
#endif
#ifdef DUK_USE_DEBUG
if (is_error) {
DUK_DDD(DUK_DDDPRINT("YIELD ERROR: value=%!T",
(duk_tval *) duk_get_tval(ctx, 0)));
} else {
DUK_DDD(DUK_DDDPRINT("YIELD NORMAL: value=%!T",
(duk_tval *) duk_get_tval(ctx, 0)));
}
#endif
/*
* Process yield
*
* After longjmp(), processing continues in bytecode executor longjmp
* handler, which will e.g. update thr->resumer to NULL.
*/
thr->heap->lj.type = DUK_LJ_TYPE_YIELD;
/* lj value1: value */
DUK_ASSERT(thr->valstack_bottom < thr->valstack_top);
DUK_TVAL_SET_TVAL_UPDREF(thr, &thr->heap->lj.value1, &thr->valstack_bottom[0]); /* side effects */
DUK_TVAL_CHKFAST_INPLACE(&thr->heap->lj.value1);
thr->heap->lj.iserror = is_error;
DUK_ASSERT(thr->heap->lj.jmpbuf_ptr != NULL); /* call is from executor, so we know we have a jmpbuf */
duk_err_longjmp(thr); /* execution resumes in bytecode executor */
return 0; /* never here */
state_error:
DUK_ERROR_TYPE(thr, "invalid state");
return 0; /* never here */
}
DUK_INTERNAL duk_ret_t duk_bi_thread_current(duk_context *ctx) {
duk_push_current_thread(ctx);
return 1;
}
#line 1 "duk_bi_thrower.c"
/*
* Type error thrower, E5 Section 13.2.3.
*/
/* include removed: duk_internal.h */
DUK_INTERNAL duk_ret_t duk_bi_type_error_thrower(duk_context *ctx) {
DUK_UNREF(ctx);
return DUK_RET_TYPE_ERROR;
}
#line 1 "duk_debug_fixedbuffer.c"
/*
* Fixed buffer helper useful for debugging, requires no allocation
* which is critical for debugging.
*/
/* include removed: duk_internal.h */
#ifdef DUK_USE_DEBUG
DUK_INTERNAL void duk_fb_put_bytes(duk_fixedbuffer *fb, const duk_uint8_t *buffer, duk_size_t length) {
duk_size_t avail;
duk_size_t copylen;
avail = (fb->offset >= fb->length ? (duk_size_t) 0 : (duk_size_t) (fb->length - fb->offset));
if (length > avail) {
copylen = avail;
fb->truncated = 1;
} else {
copylen = length;
}
DUK_MEMCPY(fb->buffer + fb->offset, buffer, copylen);
fb->offset += copylen;
}
DUK_INTERNAL void duk_fb_put_byte(duk_fixedbuffer *fb, duk_uint8_t x) {
duk_fb_put_bytes(fb, (const duk_uint8_t *) &x, 1);
}
DUK_INTERNAL void duk_fb_put_cstring(duk_fixedbuffer *fb, const char *x) {
duk_fb_put_bytes(fb, (const duk_uint8_t *) x, (duk_size_t) DUK_STRLEN(x));
}
DUK_INTERNAL void duk_fb_sprintf(duk_fixedbuffer *fb, const char *fmt, ...) {
duk_size_t avail;
va_list ap;
va_start(ap, fmt);
avail = (fb->offset >= fb->length ? (duk_size_t) 0 : (duk_size_t) (fb->length - fb->offset));
if (avail > 0) {
duk_int_t res = (duk_int_t) DUK_VSNPRINTF((char *) (fb->buffer + fb->offset), avail, fmt, ap);
if (res < 0) {
/* error */
} else if ((duk_size_t) res >= avail) {
/* (maybe) truncated */
fb->offset += avail;
if ((duk_size_t) res > avail) {
/* actual chars dropped (not just NUL term) */
fb->truncated = 1;
}
} else {
/* normal */
fb->offset += res;
}
}
va_end(ap);
}
DUK_INTERNAL void duk_fb_put_funcptr(duk_fixedbuffer *fb, duk_uint8_t *fptr, duk_size_t fptr_size) {
char buf[64+1];
duk_debug_format_funcptr(buf, sizeof(buf), fptr, fptr_size);
buf[sizeof(buf) - 1] = (char) 0;
duk_fb_put_cstring(fb, buf);
}
DUK_INTERNAL duk_bool_t duk_fb_is_full(duk_fixedbuffer *fb) {
return (fb->offset >= fb->length);
}
#endif /* DUK_USE_DEBUG */
#line 1 "duk_debug_heap.c"
/*
* Debug dumping of duk_heap.
*/
/* include removed: duk_internal.h */
#ifdef DUK_USE_DEBUG
#if 0 /*unused*/
DUK_LOCAL void duk__sanitize_snippet(char *buf, duk_size_t buf_size, duk_hstring *str) {
duk_size_t i;
duk_size_t nchars;
duk_size_t maxchars;
duk_uint8_t *data;
DUK_MEMZERO(buf, buf_size);
maxchars = (duk_size_t) (buf_size - 1);
data = DUK_HSTRING_GET_DATA(str);
nchars = ((duk_size_t) str->blen < maxchars ? (duk_size_t) str->blen : maxchars);
for (i = 0; i < nchars; i++) {
duk_small_int_t c = (duk_small_int_t) data[i];
if (c < 0x20 || c > 0x7e) {
c = '.';
}
buf[i] = (char) c;
}
}
#endif
#if 0
DUK_LOCAL const char *duk__get_heap_type_string(duk_heaphdr *hdr) {
switch (DUK_HEAPHDR_GET_TYPE(hdr)) {
case DUK_HTYPE_STRING:
return "string";
case DUK_HTYPE_OBJECT:
return "object";
case DUK_HTYPE_BUFFER:
return "buffer";
default:
return "???";
}
}
#endif
#if 0
DUK_LOCAL void duk__dump_indented(duk_heaphdr *obj, int index) {
DUK_UNREF(obj);
DUK_UNREF(index);
DUK_UNREF(duk__get_heap_type_string);
#ifdef DUK_USE_REFERENCE_COUNTING
DUK_D(DUK_DPRINT(" [%ld]: %p %s (flags: 0x%08lx, ref: %ld) -> %!O",
(long) index,
(void *) obj,
(const char *) duk__get_heap_type_string(obj),
(unsigned long) DUK_HEAPHDR_GET_FLAGS(obj),
(long) DUK_HEAPHDR_GET_REFCOUNT(obj),
(duk_heaphdr *) obj));
#else
DUK_D(DUK_DPRINT(" [%ld]: %p %s (flags: 0x%08lx) -> %!O",
(long) index,
(void *) obj,
(const char *) duk__get_heap_type_string(obj),
(unsigned long) DUK_HEAPHDR_GET_FLAGS(obj),
(duk_heaphdr *) obj));
#endif
}
#endif
#if 0 /*unused*/
DUK_LOCAL void duk__dump_heaphdr_list(duk_heap *heap, duk_heaphdr *root, const char *name) {
duk_int_t count;
duk_heaphdr *curr;
DUK_UNREF(heap);
DUK_UNREF(name);
count = 0;
curr = root;
while (curr) {
count++;
curr = DUK_HEAPHDR_GET_NEXT(curr);
}
DUK_D(DUK_DPRINT("%s, %ld objects", (const char *) name, (long) count));
count = 0;
curr = root;
while (curr) {
count++;
duk__dump_indented(curr, count);
curr = DUK_HEAPHDR_GET_NEXT(curr);
}
}
#endif
#if 0 /*unused*/
DUK_LOCAL void duk__dump_stringtable(duk_heap *heap) {
duk_uint_fast32_t i;
char buf[64+1];
DUK_D(DUK_DPRINT("stringtable %p, used %ld, size %ld, load %ld%%",
(void *) heap->strtable,
(long) heap->st_used,
(long) heap->st_size,
(long) (((double) heap->st_used) / ((double) heap->st_size) * 100.0)));
for (i = 0; i < (duk_uint_fast32_t) heap->st_size; i++) {
duk_hstring *e = heap->strtable[i];
if (!e) {
DUK_D(DUK_DPRINT(" [%ld]: NULL", (long) i));
} else if (e == DUK_STRTAB_DELETED_MARKER(heap)) {
DUK_D(DUK_DPRINT(" [%ld]: DELETED", (long) i));
} else {
duk__sanitize_snippet(buf, sizeof(buf), e);
#ifdef DUK_USE_REFERENCE_COUNTING
DUK_D(DUK_DPRINT(" [%ld]: %p (flags: 0x%08lx, ref: %ld) '%s', strhash=0x%08lx, blen=%ld, clen=%ld, "
"arridx=%ld, internal=%ld, reserved_word=%ld, strict_reserved_word=%ld, eval_or_arguments=%ld",
(long) i,
(void *) e,
(unsigned long) DUK_HEAPHDR_GET_FLAGS((duk_heaphdr *) e),
(long) DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) e),
(const char *) buf,
(unsigned long) e->hash,
(long) e->blen,
(long) e->clen,
(long) (DUK_HSTRING_HAS_ARRIDX(e) ? 1 : 0),
(long) (DUK_HSTRING_HAS_INTERNAL(e) ? 1 : 0),
(long) (DUK_HSTRING_HAS_RESERVED_WORD(e) ? 1 : 0),
(long) (DUK_HSTRING_HAS_STRICT_RESERVED_WORD(e) ? 1 : 0),
(long) (DUK_HSTRING_HAS_EVAL_OR_ARGUMENTS(e) ? 1 : 0)));
#else
DUK_D(DUK_DPRINT(" [%ld]: %p (flags: 0x%08lx) '%s', strhash=0x%08lx, blen=%ld, clen=%ld, "
"arridx=%ld, internal=%ld, reserved_word=%ld, strict_reserved_word=%ld, eval_or_arguments=%ld",
(long) i,
(void *) e,
(unsigned long) DUK_HEAPHDR_GET_FLAGS((duk_heaphdr *) e),
(const char *) buf,
(long) e->hash,
(long) e->blen,
(long) e->clen,
(long) (DUK_HSTRING_HAS_ARRIDX(e) ? 1 : 0),
(long) (DUK_HSTRING_HAS_INTERNAL(e) ? 1 : 0),
(long) (DUK_HSTRING_HAS_RESERVED_WORD(e) ? 1 : 0),
(long) (DUK_HSTRING_HAS_STRICT_RESERVED_WORD(e) ? 1 : 0),
(long) (DUK_HSTRING_HAS_EVAL_OR_ARGUMENTS(e) ? 1 : 0)));
#endif
}
}
}
#endif
#if 0 /*unused*/
DUK_LOCAL void duk__dump_strcache(duk_heap *heap) {
duk_uint_fast32_t i;
char buf[64+1];
DUK_D(DUK_DPRINT("stringcache"));
for (i = 0; i < (duk_uint_fast32_t) DUK_HEAP_STRCACHE_SIZE; i++) {
duk_strcache *c = &heap->strcache[i];
if (!c->h) {
DUK_D(DUK_DPRINT(" [%ld]: bidx=%ld, cidx=%ld, str=NULL",
(long) i, (long) c->bidx, (long) c->cidx));
} else {
duk__sanitize_snippet(buf, sizeof(buf), c->h);
DUK_D(DUK_DPRINT(" [%ld]: bidx=%ld cidx=%ld str=%s",
(long) i, (long) c->bidx, (long) c->cidx, (const char *) buf));
}
}
}
#endif
#if 0 /*unused*/
DUK_INTERNAL void duk_debug_dump_heap(duk_heap *heap) {
char buf[64+1];
DUK_D(DUK_DPRINT("=== heap %p ===", (void *) heap));
DUK_D(DUK_DPRINT(" flags: 0x%08lx", (unsigned long) heap->flags));
/* Note: there is no standard formatter for function pointers */
#ifdef DUK_USE_GCC_PRAGMAS
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-pedantic"
#endif
duk_debug_format_funcptr(buf, sizeof(buf), (duk_uint8_t *) &heap->alloc_func, sizeof(heap->alloc_func));
DUK_D(DUK_DPRINT(" alloc_func: %s", (const char *) buf));
duk_debug_format_funcptr(buf, sizeof(buf), (duk_uint8_t *) &heap->realloc_func, sizeof(heap->realloc_func));
DUK_D(DUK_DPRINT(" realloc_func: %s", (const char *) buf));
duk_debug_format_funcptr(buf, sizeof(buf), (duk_uint8_t *) &heap->free_func, sizeof(heap->free_func));
DUK_D(DUK_DPRINT(" free_func: %s", (const char *) buf));
duk_debug_format_funcptr(buf, sizeof(buf), (duk_uint8_t *) &heap->fatal_func, sizeof(heap->fatal_func));
DUK_D(DUK_DPRINT(" fatal_func: %s", (const char *) buf));
#ifdef DUK_USE_GCC_PRAGMAS
#pragma GCC diagnostic pop
#endif
DUK_D(DUK_DPRINT(" heap_udata: %p", (void *) heap->heap_udata));
#ifdef DUK_USE_MARK_AND_SWEEP
#ifdef DUK_USE_VOLUNTARY_GC
DUK_D(DUK_DPRINT(" mark-and-sweep trig counter: %ld", (long) heap->mark_and_sweep_trigger_counter));
#endif
DUK_D(DUK_DPRINT(" mark-and-sweep rec depth: %ld", (long) heap->mark_and_sweep_recursion_depth));
DUK_D(DUK_DPRINT(" mark-and-sweep base flags: 0x%08lx", (unsigned long) heap->mark_and_sweep_base_flags));
#endif
DUK_D(DUK_DPRINT(" lj.jmpbuf_ptr: %p", (void *) heap->lj.jmpbuf_ptr));
DUK_D(DUK_DPRINT(" lj.type: %ld", (long) heap->lj.type));
DUK_D(DUK_DPRINT(" lj.value1: %!T", (duk_tval *) &heap->lj.value1));
DUK_D(DUK_DPRINT(" lj.value2: %!T", (duk_tval *) &heap->lj.value2));
DUK_D(DUK_DPRINT(" lj.iserror: %ld", (long) heap->lj.iserror));
DUK_D(DUK_DPRINT(" handling_error: %ld", (long) heap->handling_error));
DUK_D(DUK_DPRINT(" heap_thread: %!@O", (duk_heaphdr *) heap->heap_thread));
DUK_D(DUK_DPRINT(" curr_thread: %!@O", (duk_heaphdr *) heap->curr_thread));
DUK_D(DUK_DPRINT(" heap_object: %!@O", (duk_heaphdr *) heap->heap_object));
DUK_D(DUK_DPRINT(" call_recursion_depth: %ld", (long) heap->call_recursion_depth));
DUK_D(DUK_DPRINT(" call_recursion_limit: %ld", (long) heap->call_recursion_limit));
DUK_D(DUK_DPRINT(" hash_seed: 0x%08lx", (unsigned long) heap->hash_seed));
DUK_D(DUK_DPRINT(" rnd_state: 0x%08lx", (unsigned long) heap->rnd_state));
duk__dump_strcache(heap);
duk__dump_heaphdr_list(heap, heap->heap_allocated, "heap allocated");
#ifdef DUK_USE_REFERENCE_COUNTING
duk__dump_heaphdr_list(heap, heap->refzero_list, "refcounting refzero list");
#endif
#ifdef DUK_USE_MARK_AND_SWEEP
duk__dump_heaphdr_list(heap, heap->finalize_list, "mark-and-sweep finalize list");
#endif
duk__dump_stringtable(heap);
/* heap->strs: not worth dumping */
}
#endif
#endif /* DUK_USE_DEBUG */
#line 1 "duk_debug_vsnprintf.c"
/*
* Custom formatter for debug printing, allowing Duktape specific data
* structures (such as tagged values and heap objects) to be printed with
* a nice format string. Because debug printing should not affect execution
* state, formatting here must be independent of execution (see implications
* below) and must not allocate memory.
*
* Custom format tags begin with a '%!' to safely distinguish them from
* standard format tags. The following conversions are supported:
*
* %!T tagged value (duk_tval *)
* %!O heap object (duk_heaphdr *)
* %!I decoded bytecode instruction
* %!C bytecode instruction opcode name (arg is long)
*
* Everything is serialized in a JSON-like manner. The default depth is one
* level, internal prototype is not followed, and internal properties are not
* serialized. The following modifiers change this behavior:
*
* @ print pointers
* # print binary representations (where applicable)
* d deep traversal of own properties (not prototype)
* p follow prototype chain (useless without 'd')
* i include internal properties (other than prototype)
* x hexdump buffers
* h heavy formatting
*
* For instance, the following serializes objects recursively, but does not
* follow the prototype chain nor print internal properties: "%!dO".
*
* Notes:
*
* * Standard snprintf return value semantics seem to vary. This
* implementation returns the number of bytes it actually wrote
* (excluding the null terminator). If retval == buffer size,
* output was truncated (except for corner cases).
*
* * Output format is intentionally different from Ecmascript
* formatting requirements, as formatting here serves debugging
* of internals.
*
* * Depth checking (and updating) is done in each type printer
* separately, to allow them to call each other freely.
*
* * Some pathological structures might take ages to print (e.g.
* self recursion with 100 properties pointing to the object
* itself). To guard against these, each printer also checks
* whether the output buffer is full; if so, early exit.
*
* * Reference loops are detected using a loop stack.
*/
/* include removed: duk_internal.h */
#ifdef DUK_USE_DEBUG
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
/* list of conversion specifiers that terminate a format tag;
* this is unfortunately guesswork.
*/
#define DUK__ALLOWED_STANDARD_SPECIFIERS "diouxXeEfFgGaAcsCSpnm"
/* maximum length of standard format tag that we support */
#define DUK__MAX_FORMAT_TAG_LENGTH 32
/* heapobj recursion depth when deep printing is selected */
#define DUK__DEEP_DEPTH_LIMIT 8
/* maximum recursion depth for loop detection stacks */
#define DUK__LOOP_STACK_DEPTH 256
/* must match bytecode defines now; build autogenerate? */
DUK_LOCAL const char *duk__bc_optab[64] = {
"LDREG", "STREG", "LDCONST", "LDINT", "LDINTX", "MPUTOBJ", "MPUTOBJI", "MPUTARR", "MPUTARRI", "NEW",
"NEWI", "REGEXP", "CSREG", "CSREGI", "GETVAR", "PUTVAR", "DECLVAR", "DELVAR", "CSVAR", "CSVARI",
"CLOSURE", "GETPROP", "PUTPROP", "DELPROP", "CSPROP", "CSPROPI", "ADD", "SUB", "MUL", "DIV",
"MOD", "BAND", "BOR", "BXOR", "BASL", "BLSR", "BASR", "EQ", "NEQ", "SEQ",
"SNEQ", "GT", "GE", "LT", "LE", "IF", "JUMP", "RETURN", "CALL", "CALLI",
"TRYCATCH", "EXTRA", "PREINCR", "PREDECR", "POSTINCR", "POSTDECR", "PREINCV", "PREDECV", "POSTINCV", "POSTDECV",
"PREINCP", "PREDECP", "POSTINCP", "POSTDECP"
};
DUK_LOCAL const char *duk__bc_extraoptab[256] = {
"NOP", "INVALID", "LDTHIS", "LDUNDEF", "LDNULL", "LDTRUE", "LDFALSE", "NEWOBJ", "NEWARR", "SETALEN",
"TYPEOF", "TYPEOFID", "INITENUM", "NEXTENUM", "INITSET", "INITSETI", "INITGET", "INITGETI", "ENDTRY", "ENDCATCH",
"ENDFIN", "THROW", "INVLHS", "UNM", "UNP", "DEBUGGER", "BREAK", "CONTINUE", "BNOT", "LNOT",
"INSTOF", "IN", "LABEL", "ENDLABEL", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX", "XXX",
"XXX", "XXX", "XXX", "XXX", "XXX", "XXX"
};
typedef struct duk__dprint_state duk__dprint_state;
struct duk__dprint_state {
duk_fixedbuffer *fb;
/* loop_stack_index could be perhaps be replaced by 'depth', but it's nice
* to not couple these two mechanisms unnecessarily.
*/
duk_hobject *loop_stack[DUK__LOOP_STACK_DEPTH];
duk_int_t loop_stack_index;
duk_int_t loop_stack_limit;
duk_int_t depth;
duk_int_t depth_limit;
duk_bool_t pointer;
duk_bool_t heavy;
duk_bool_t binary;
duk_bool_t follow_proto;
duk_bool_t internal;
duk_bool_t hexdump;
};
/* helpers */
DUK_LOCAL_DECL void duk__print_hstring(duk__dprint_state *st, duk_hstring *k, duk_bool_t quotes);
DUK_LOCAL_DECL void duk__print_hobject(duk__dprint_state *st, duk_hobject *h);
DUK_LOCAL_DECL void duk__print_hbuffer(duk__dprint_state *st, duk_hbuffer *h);
DUK_LOCAL_DECL void duk__print_tval(duk__dprint_state *st, duk_tval *tv);
DUK_LOCAL_DECL void duk__print_instr(duk__dprint_state *st, duk_instr_t ins);
DUK_LOCAL_DECL void duk__print_heaphdr(duk__dprint_state *st, duk_heaphdr *h);
DUK_LOCAL_DECL void duk__print_shared_heaphdr(duk__dprint_state *st, duk_heaphdr *h);
DUK_LOCAL_DECL void duk__print_shared_heaphdr_string(duk__dprint_state *st, duk_heaphdr_string *h);
DUK_LOCAL void duk__print_shared_heaphdr(duk__dprint_state *st, duk_heaphdr *h) {
duk_fixedbuffer *fb = st->fb;
if (st->heavy) {
duk_fb_sprintf(fb, "(%p)", (void *) h);
}
if (!h) {
return;
}
if (st->binary) {
duk_size_t i;
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_LBRACKET);
for (i = 0; i < (duk_size_t) sizeof(*h); i++) {
duk_fb_sprintf(fb, "%02lx", (unsigned long) ((duk_uint8_t *)h)[i]);
}
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_RBRACKET);
}
#ifdef DUK_USE_REFERENCE_COUNTING /* currently implicitly also DUK_USE_DOUBLE_LINKED_HEAP */
if (st->heavy) {
duk_fb_sprintf(fb, "[h_next=%p,h_prev=%p,h_refcount=%lu,h_flags=%08lx,type=%ld,"
"reachable=%ld,temproot=%ld,finalizable=%ld,finalized=%ld]",
(void *) DUK_HEAPHDR_GET_NEXT(NULL, h),
(void *) DUK_HEAPHDR_GET_PREV(NULL, h),
(unsigned long) DUK_HEAPHDR_GET_REFCOUNT(h),
(unsigned long) DUK_HEAPHDR_GET_FLAGS(h),
(long) DUK_HEAPHDR_GET_TYPE(h),
(long) (DUK_HEAPHDR_HAS_REACHABLE(h) ? 1 : 0),
(long) (DUK_HEAPHDR_HAS_TEMPROOT(h) ? 1 : 0),
(long) (DUK_HEAPHDR_HAS_FINALIZABLE(h) ? 1 : 0),
(long) (DUK_HEAPHDR_HAS_FINALIZED(h) ? 1 : 0));
}
#else
if (st->heavy) {
duk_fb_sprintf(fb, "[h_next=%p,h_flags=%08lx,type=%ld,reachable=%ld,temproot=%ld,finalizable=%ld,finalized=%ld]",
(void *) DUK_HEAPHDR_GET_NEXT(NULL, h),
(unsigned long) DUK_HEAPHDR_GET_FLAGS(h),
(long) DUK_HEAPHDR_GET_TYPE(h),
(long) (DUK_HEAPHDR_HAS_REACHABLE(h) ? 1 : 0),
(long) (DUK_HEAPHDR_HAS_TEMPROOT(h) ? 1 : 0),
(long) (DUK_HEAPHDR_HAS_FINALIZABLE(h) ? 1 : 0),
(long) (DUK_HEAPHDR_HAS_FINALIZED(h) ? 1 : 0));
}
#endif
}
DUK_LOCAL void duk__print_shared_heaphdr_string(duk__dprint_state *st, duk_heaphdr_string *h) {
duk_fixedbuffer *fb = st->fb;
if (st->heavy) {
duk_fb_sprintf(fb, "(%p)", (void *) h);
}
if (!h) {
return;
}
if (st->binary) {
duk_size_t i;
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_LBRACKET);
for (i = 0; i < (duk_size_t) sizeof(*h); i++) {
duk_fb_sprintf(fb, "%02lx", (unsigned long) ((duk_uint8_t *)h)[i]);
}
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_RBRACKET);
}
#ifdef DUK_USE_REFERENCE_COUNTING
if (st->heavy) {
duk_fb_sprintf(fb, "[h_refcount=%lu,h_flags=%08lx,type=%ld,reachable=%ld,temproot=%ld,finalizable=%ld,finalized=%ld]",
(unsigned long) DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) h),
(unsigned long) DUK_HEAPHDR_GET_FLAGS((duk_heaphdr *) h),
(long) DUK_HEAPHDR_GET_TYPE((duk_heaphdr *) h),
(long) (DUK_HEAPHDR_HAS_REACHABLE((duk_heaphdr *) h) ? 1 : 0),
(long) (DUK_HEAPHDR_HAS_TEMPROOT((duk_heaphdr *) h) ? 1 : 0),
(long) (DUK_HEAPHDR_HAS_FINALIZABLE((duk_heaphdr *) h) ? 1 : 0),
(long) (DUK_HEAPHDR_HAS_FINALIZED((duk_heaphdr *) h) ? 1 : 0));
}
#else
if (st->heavy) {
duk_fb_sprintf(fb, "[h_flags=%08lx,type=%ld,reachable=%ld,temproot=%ld,finalizable=%ld,finalized=%ld]",
(unsigned long) DUK_HEAPHDR_GET_FLAGS((duk_heaphdr *) h),
(long) DUK_HEAPHDR_GET_TYPE((duk_heaphdr *) h),
(long) (DUK_HEAPHDR_HAS_REACHABLE((duk_heaphdr *) h) ? 1 : 0),
(long) (DUK_HEAPHDR_HAS_TEMPROOT((duk_heaphdr *) h) ? 1 : 0),
(long) (DUK_HEAPHDR_HAS_FINALIZABLE((duk_heaphdr *) h) ? 1 : 0),
(long) (DUK_HEAPHDR_HAS_FINALIZED((duk_heaphdr *) h) ? 1 : 0));
}
#endif
}
DUK_LOCAL void duk__print_hstring(duk__dprint_state *st, duk_hstring *h, duk_bool_t quotes) {
duk_fixedbuffer *fb = st->fb;
const duk_uint8_t *p;
const duk_uint8_t *p_end;
/* terminal type: no depth check */
if (duk_fb_is_full(fb)) {
return;
}
duk__print_shared_heaphdr_string(st, &h->hdr);
if (!h) {
duk_fb_put_cstring(fb, "NULL");
return;
}
p = DUK_HSTRING_GET_DATA(h);
p_end = p + DUK_HSTRING_GET_BYTELEN(h);
if (p_end > p && p[0] == DUK_ASC_UNDERSCORE) {
/* if property key begins with underscore, encode it with
* forced quotes (e.g. "_Foo") to distinguish it from encoded
* internal properties (e.g. \xffBar -> _Bar).
*/
quotes = 1;
}
if (quotes) {
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_DOUBLEQUOTE);
}
while (p < p_end) {
duk_uint8_t ch = *p++;
/* two special escapes: '\' and '"', other printables as is */
if (ch == '\\') {
duk_fb_sprintf(fb, "\\\\");
} else if (ch == '"') {
duk_fb_sprintf(fb, "\\\"");
} else if (ch >= 0x20 && ch <= 0x7e) {
duk_fb_put_byte(fb, ch);
} else if (ch == 0xff && !quotes) {
/* encode \xffBar as _Bar if no quotes are applied, this is for
* readable internal keys.
*/
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_UNDERSCORE);
} else {
duk_fb_sprintf(fb, "\\x%02lx", (unsigned long) ch);
}
}
if (quotes) {
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_DOUBLEQUOTE);
}
#ifdef DUK_USE_REFERENCE_COUNTING
/* XXX: limit to quoted strings only, to save keys from being cluttered? */
duk_fb_sprintf(fb, "/%lu", (unsigned long) DUK_HEAPHDR_GET_REFCOUNT(&h->hdr));
#endif
}
#ifdef DUK__COMMA
#undef DUK__COMMA
#endif
#define DUK__COMMA() do { \
if (first) { \
first = 0; \
} else { \
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_COMMA); \
} \
} while (0)
DUK_LOCAL void duk__print_hobject(duk__dprint_state *st, duk_hobject *h) {
duk_fixedbuffer *fb = st->fb;
duk_uint_fast32_t i;
duk_tval *tv;
duk_hstring *key;
duk_bool_t first = 1;
const char *brace1 = "{";
const char *brace2 = "}";
duk_bool_t pushed_loopstack = 0;
if (duk_fb_is_full(fb)) {
return;
}
duk__print_shared_heaphdr(st, &h->hdr);
if (h && DUK_HOBJECT_HAS_ARRAY_PART(h)) {
brace1 = "[";
brace2 = "]";
}
if (!h) {
duk_fb_put_cstring(fb, "NULL");
goto finished;
}
if (st->depth >= st->depth_limit) {
if (DUK_HOBJECT_IS_COMPILEDFUNCTION(h)) {
duk_fb_sprintf(fb, "%sobject/compiledfunction %p%s", (const char *) brace1, (void *) h, (const char *) brace2);
} else if (DUK_HOBJECT_IS_NATIVEFUNCTION(h)) {
duk_fb_sprintf(fb, "%sobject/nativefunction %p%s", (const char *) brace1, (void *) h, (const char *) brace2);
} else if (DUK_HOBJECT_IS_THREAD(h)) {
duk_fb_sprintf(fb, "%sobject/thread %p%s", (const char *) brace1, (void *) h, (const char *) brace2);
} else {
duk_fb_sprintf(fb, "%sobject %p%s", (const char *) brace1, (void *) h, (const char *) brace2); /* may be NULL */
}
return;
}
for (i = 0; i < (duk_uint_fast32_t) st->loop_stack_index; i++) {
if (st->loop_stack[i] == h) {
duk_fb_sprintf(fb, "%sLOOP:%p%s", (const char *) brace1, (void *) h, (const char *) brace2);
return;
}
}
/* after this, return paths should 'goto finished' for decrement */
st->depth++;
if (st->loop_stack_index >= st->loop_stack_limit) {
duk_fb_sprintf(fb, "%sOUT-OF-LOOP-STACK%s", (const char *) brace1, (const char *) brace2);
goto finished;
}
st->loop_stack[st->loop_stack_index++] = h;
pushed_loopstack = 1;
/*
* Notation: double underscore used for internal properties which are not
* stored in the property allocation (e.g. '__valstack').
*/
duk_fb_put_cstring(fb, brace1);
if (DUK_HOBJECT_GET_PROPS(NULL, h)) {
duk_uint32_t a_limit;
a_limit = DUK_HOBJECT_GET_ASIZE(h);
if (st->internal) {
/* dump all allocated entries, unused entries print as 'unused',
* note that these may extend beyond current 'length' and look
* a bit funny.
*/
} else {
/* leave out trailing 'unused' elements */
while (a_limit > 0) {
tv = DUK_HOBJECT_A_GET_VALUE_PTR(NULL, h, a_limit - 1);
if (!DUK_TVAL_IS_UNUSED(tv)) {
break;
}
a_limit--;
}
}
for (i = 0; i < a_limit; i++) {
tv = DUK_HOBJECT_A_GET_VALUE_PTR(NULL, h, i);
DUK__COMMA();
duk__print_tval(st, tv);
}
for (i = 0; i < DUK_HOBJECT_GET_ENEXT(h); i++) {
key = DUK_HOBJECT_E_GET_KEY(NULL, h, i);
if (!key) {
continue;
}
if (!st->internal &&
DUK_HSTRING_GET_BYTELEN(key) > 0 &&
DUK_HSTRING_GET_DATA(key)[0] == 0xff) {
/* XXX: use DUK_HSTRING_FLAG_INTERNAL? */
continue;
}
DUK__COMMA();
duk__print_hstring(st, key, 0);
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_COLON);
if (DUK_HOBJECT_E_SLOT_IS_ACCESSOR(NULL, h, i)) {
duk_fb_sprintf(fb, "[get:%p,set:%p]",
(void *) DUK_HOBJECT_E_GET_VALUE(NULL, h, i).a.get,
(void *) DUK_HOBJECT_E_GET_VALUE(NULL, h, i).a.set);
} else {
tv = &DUK_HOBJECT_E_GET_VALUE(NULL, h, i).v;
duk__print_tval(st, tv);
}
if (st->heavy) {
duk_fb_sprintf(fb, "<%02lx>", (unsigned long) DUK_HOBJECT_E_GET_FLAGS(NULL, h, i));
}
}
}
if (st->internal) {
if (DUK_HOBJECT_HAS_EXTENSIBLE(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__extensible:true");
} else {
;
}
if (DUK_HOBJECT_HAS_CONSTRUCTABLE(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__constructable:true");
} else {
;
}
if (DUK_HOBJECT_HAS_BOUND(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__bound:true");
} else {
;
}
if (DUK_HOBJECT_HAS_COMPILEDFUNCTION(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__compiledfunction:true");
} else {
;
}
if (DUK_HOBJECT_HAS_NATIVEFUNCTION(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__nativefunction:true");
} else {
;
}
if (DUK_HOBJECT_HAS_THREAD(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__thread:true");
} else {
;
}
if (DUK_HOBJECT_HAS_ARRAY_PART(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__array_part:true");
} else {
;
}
if (DUK_HOBJECT_HAS_STRICT(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__strict:true");
} else {
;
}
if (DUK_HOBJECT_HAS_NEWENV(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__newenv:true");
} else {
;
}
if (DUK_HOBJECT_HAS_NAMEBINDING(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__namebinding:true");
} else {
;
}
if (DUK_HOBJECT_HAS_CREATEARGS(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__createargs:true");
} else {
;
}
if (DUK_HOBJECT_HAS_ENVRECCLOSED(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__envrecclosed:true");
} else {
;
}
if (DUK_HOBJECT_HAS_EXOTIC_ARRAY(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_array:true");
} else {
;
}
if (DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_stringobj:true");
} else {
;
}
if (DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_arguments:true");
} else {
;
}
if (DUK_HOBJECT_HAS_EXOTIC_DUKFUNC(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_dukfunc:true");
} else {
;
}
if (DUK_HOBJECT_IS_BUFFEROBJECT(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_bufferobj:true");
} else {
;
}
if (DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_proxyobj:true");
} else {
;
}
}
if (st->internal && DUK_HOBJECT_IS_COMPILEDFUNCTION(h)) {
duk_hcompiledfunction *f = (duk_hcompiledfunction *) h;
DUK__COMMA(); duk_fb_put_cstring(fb, "__data:");
duk__print_hbuffer(st, (duk_hbuffer *) DUK_HCOMPILEDFUNCTION_GET_DATA(NULL, f));
DUK__COMMA(); duk_fb_sprintf(fb, "__nregs:%ld", (long) f->nregs);
DUK__COMMA(); duk_fb_sprintf(fb, "__nargs:%ld", (long) f->nargs);
#if defined(DUK_USE_DEBUGGER_SUPPORT)
DUK__COMMA(); duk_fb_sprintf(fb, "__start_line:%ld", (long) f->start_line);
DUK__COMMA(); duk_fb_sprintf(fb, "__end_line:%ld", (long) f->end_line);
#endif
DUK__COMMA(); duk_fb_put_cstring(fb, "__data:");
duk__print_hbuffer(st, (duk_hbuffer *) DUK_HCOMPILEDFUNCTION_GET_DATA(NULL, f));
} else if (st->internal && DUK_HOBJECT_IS_NATIVEFUNCTION(h)) {
duk_hnativefunction *f = (duk_hnativefunction *) h;
DUK__COMMA(); duk_fb_sprintf(fb, "__func:");
duk_fb_put_funcptr(fb, (duk_uint8_t *) &f->func, sizeof(f->func));
DUK__COMMA(); duk_fb_sprintf(fb, "__nargs:%ld", (long) f->nargs);
DUK__COMMA(); duk_fb_sprintf(fb, "__magic:%ld", (long) f->magic);
} else if (st->internal && DUK_HOBJECT_IS_BUFFEROBJECT(h)) {
duk_hbufferobject *b = (duk_hbufferobject *) h;
DUK__COMMA(); duk_fb_sprintf(fb, "__buf:");
duk__print_hbuffer(st, (duk_hbuffer *) b->buf);
DUK__COMMA(); duk_fb_sprintf(fb, "__offset:%ld", (long) b->offset);
DUK__COMMA(); duk_fb_sprintf(fb, "__length:%ld", (long) b->length);
DUK__COMMA(); duk_fb_sprintf(fb, "__shift:%ld", (long) b->shift);
DUK__COMMA(); duk_fb_sprintf(fb, "__elemtype:%ld", (long) b->elem_type);
} else if (st->internal && DUK_HOBJECT_IS_THREAD(h)) {
duk_hthread *t = (duk_hthread *) h;
DUK__COMMA(); duk_fb_sprintf(fb, "__strict:%ld", (long) t->strict);
DUK__COMMA(); duk_fb_sprintf(fb, "__state:%ld", (long) t->state);
DUK__COMMA(); duk_fb_sprintf(fb, "__unused1:%ld", (long) t->unused1);
DUK__COMMA(); duk_fb_sprintf(fb, "__unused2:%ld", (long) t->unused2);
DUK__COMMA(); duk_fb_sprintf(fb, "__valstack_max:%ld", (long) t->valstack_max);
DUK__COMMA(); duk_fb_sprintf(fb, "__callstack_max:%ld", (long) t->callstack_max);
DUK__COMMA(); duk_fb_sprintf(fb, "__catchstack_max:%ld", (long) t->catchstack_max);
DUK__COMMA(); duk_fb_sprintf(fb, "__valstack:%p", (void *) t->valstack);
DUK__COMMA(); duk_fb_sprintf(fb, "__valstack_end:%p/%ld", (void *) t->valstack_end, (long) (t->valstack_end - t->valstack));
DUK__COMMA(); duk_fb_sprintf(fb, "__valstack_bottom:%p/%ld", (void *) t->valstack_bottom, (long) (t->valstack_bottom - t->valstack));
DUK__COMMA(); duk_fb_sprintf(fb, "__valstack_top:%p/%ld", (void *) t->valstack_top, (long) (t->valstack_top - t->valstack));
DUK__COMMA(); duk_fb_sprintf(fb, "__catchstack:%p", (void *) t->catchstack);
DUK__COMMA(); duk_fb_sprintf(fb, "__catchstack_size:%ld", (long) t->catchstack_size);
DUK__COMMA(); duk_fb_sprintf(fb, "__catchstack_top:%ld", (long) t->catchstack_top);
DUK__COMMA(); duk_fb_sprintf(fb, "__resumer:"); duk__print_hobject(st, (duk_hobject *) t->resumer);
/* XXX: print built-ins array? */
}
#ifdef DUK_USE_REFERENCE_COUNTING
if (st->internal) {
DUK__COMMA(); duk_fb_sprintf(fb, "__refcount:%lu", (unsigned long) DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) h));
}
#endif
if (st->internal) {
DUK__COMMA(); duk_fb_sprintf(fb, "__class:%ld", (long) DUK_HOBJECT_GET_CLASS_NUMBER(h));
}
DUK__COMMA(); duk_fb_sprintf(fb, "__heapptr:%p", (void *) h); /* own pointer */
/* prototype should be last, for readability */
if (DUK_HOBJECT_GET_PROTOTYPE(NULL, h)) {
if (st->follow_proto) {
DUK__COMMA(); duk_fb_put_cstring(fb, "__prototype:"); duk__print_hobject(st, DUK_HOBJECT_GET_PROTOTYPE(NULL, h));
} else {
DUK__COMMA(); duk_fb_sprintf(fb, "__prototype:%p", (void *) DUK_HOBJECT_GET_PROTOTYPE(NULL, h));
}
}
duk_fb_put_cstring(fb, brace2);
#if defined(DUK_USE_HOBJECT_HASH_PART)
if (st->heavy && DUK_HOBJECT_GET_HSIZE(h) > 0) {
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_LANGLE);
for (i = 0; i < DUK_HOBJECT_GET_HSIZE(h); i++) {
duk_uint_t h_idx = DUK_HOBJECT_H_GET_INDEX(NULL, h, i);
if (i > 0) {
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_COMMA);
}
if (h_idx == DUK_HOBJECT_HASHIDX_UNUSED) {
duk_fb_sprintf(fb, "u");
} else if (h_idx == DUK_HOBJECT_HASHIDX_DELETED) {
duk_fb_sprintf(fb, "d");
} else {
duk_fb_sprintf(fb, "%ld", (long) h_idx);
}
}
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_RANGLE);
}
#endif
finished:
st->depth--;
if (pushed_loopstack) {
st->loop_stack_index--;
st->loop_stack[st->loop_stack_index] = NULL;
}
}
#undef DUK__COMMA
DUK_LOCAL void duk__print_hbuffer(duk__dprint_state *st, duk_hbuffer *h) {
duk_fixedbuffer *fb = st->fb;
duk_size_t i, n;
duk_uint8_t *p;
if (duk_fb_is_full(fb)) {
return;
}
/* terminal type: no depth check */
if (!h) {
duk_fb_put_cstring(fb, "NULL");
return;
}
if (DUK_HBUFFER_HAS_DYNAMIC(h)) {
if (DUK_HBUFFER_HAS_EXTERNAL(h)) {
duk_hbuffer_external *g = (duk_hbuffer_external *) h;
duk_fb_sprintf(fb, "buffer:external:%p:%ld",
(void *) DUK_HBUFFER_EXTERNAL_GET_DATA_PTR(NULL, g),
(long) DUK_HBUFFER_EXTERNAL_GET_SIZE(g));
} else {
duk_hbuffer_dynamic *g = (duk_hbuffer_dynamic *) h;
duk_fb_sprintf(fb, "buffer:dynamic:%p:%ld",
(void *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(NULL, g),
(long) DUK_HBUFFER_DYNAMIC_GET_SIZE(g));
}
} else {
duk_fb_sprintf(fb, "buffer:fixed:%ld", (long) DUK_HBUFFER_GET_SIZE(h));
}
#ifdef DUK_USE_REFERENCE_COUNTING
duk_fb_sprintf(fb, "/%lu", (unsigned long) DUK_HEAPHDR_GET_REFCOUNT(&h->hdr));
#endif
if (st->hexdump) {
duk_fb_sprintf(fb, "=[");
n = DUK_HBUFFER_GET_SIZE(h);
p = (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(NULL, h);
for (i = 0; i < n; i++) {
duk_fb_sprintf(fb, "%02lx", (unsigned long) p[i]);
}
duk_fb_sprintf(fb, "]");
}
}
DUK_LOCAL void duk__print_heaphdr(duk__dprint_state *st, duk_heaphdr *h) {
duk_fixedbuffer *fb = st->fb;
if (duk_fb_is_full(fb)) {
return;
}
if (!h) {
duk_fb_put_cstring(fb, "NULL");
return;
}
switch (DUK_HEAPHDR_GET_TYPE(h)) {
case DUK_HTYPE_STRING:
duk__print_hstring(st, (duk_hstring *) h, 1);
break;
case DUK_HTYPE_OBJECT:
duk__print_hobject(st, (duk_hobject *) h);
break;
case DUK_HTYPE_BUFFER:
duk__print_hbuffer(st, (duk_hbuffer *) h);
break;
default:
duk_fb_sprintf(fb, "[unknown htype %ld]", (long) DUK_HEAPHDR_GET_TYPE(h));
break;
}
}
DUK_LOCAL void duk__print_tval(duk__dprint_state *st, duk_tval *tv) {
duk_fixedbuffer *fb = st->fb;
if (duk_fb_is_full(fb)) {
return;
}
/* depth check is done when printing an actual type */
if (st->heavy) {
duk_fb_sprintf(fb, "(%p)", (void *) tv);
}
if (!tv) {
duk_fb_put_cstring(fb, "NULL");
return;
}
if (st->binary) {
duk_size_t i;
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_LBRACKET);
for (i = 0; i < (duk_size_t) sizeof(*tv); i++) {
duk_fb_sprintf(fb, "%02lx", (unsigned long) ((duk_uint8_t *)tv)[i]);
}
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_RBRACKET);
}
if (st->heavy) {
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_LANGLE);
}
switch (DUK_TVAL_GET_TAG(tv)) {
case DUK_TAG_UNDEFINED: {
duk_fb_put_cstring(fb, "undefined");
break;
}
case DUK_TAG_UNUSED: {
duk_fb_put_cstring(fb, "unused");
break;
}
case DUK_TAG_NULL: {
duk_fb_put_cstring(fb, "null");
break;
}
case DUK_TAG_BOOLEAN: {
duk_fb_put_cstring(fb, DUK_TVAL_GET_BOOLEAN(tv) ? "true" : "false");
break;
}
case DUK_TAG_STRING: {
/* Note: string is a terminal heap object, so no depth check here */
duk__print_hstring(st, DUK_TVAL_GET_STRING(tv), 1);
break;
}
case DUK_TAG_OBJECT: {
duk__print_hobject(st, DUK_TVAL_GET_OBJECT(tv));
break;
}
case DUK_TAG_BUFFER: {
duk__print_hbuffer(st, DUK_TVAL_GET_BUFFER(tv));
break;
}
case DUK_TAG_POINTER: {
duk_fb_sprintf(fb, "pointer:%p", (void *) DUK_TVAL_GET_POINTER(tv));
break;
}
case DUK_TAG_LIGHTFUNC: {
duk_c_function func;
duk_small_uint_t lf_flags;
DUK_TVAL_GET_LIGHTFUNC(tv, func, lf_flags);
duk_fb_sprintf(fb, "lightfunc:");
duk_fb_put_funcptr(fb, (duk_uint8_t *) &func, sizeof(func));
duk_fb_sprintf(fb, ":%04lx", (long) lf_flags);
break;
}
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT:
#endif
default: {
/* IEEE double is approximately 16 decimal digits; print a couple extra */
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
duk_fb_sprintf(fb, "%.18g", (double) DUK_TVAL_GET_NUMBER(tv));
break;
}
}
if (st->heavy) {
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_RANGLE);
}
}
DUK_LOCAL void duk__print_instr(duk__dprint_state *st, duk_instr_t ins) {
duk_fixedbuffer *fb = st->fb;
duk_small_int_t op;
const char *op_name;
const char *extraop_name;
op = (duk_small_int_t) DUK_DEC_OP(ins);
op_name = duk__bc_optab[op];
/* XXX: option to fix opcode length so it lines up nicely */
if (op == DUK_OP_EXTRA) {
extraop_name = duk__bc_extraoptab[DUK_DEC_A(ins)];
duk_fb_sprintf(fb, "%s %ld, %ld",
(const char *) extraop_name, (long) DUK_DEC_B(ins), (long) DUK_DEC_C(ins));
} else if (op == DUK_OP_JUMP) {
duk_int_t diff1 = DUK_DEC_ABC(ins) - DUK_BC_JUMP_BIAS; /* from next pc */
duk_int_t diff2 = diff1 + 1; /* from curr pc */
duk_fb_sprintf(fb, "%s %ld (to pc%c%ld)",
(const char *) op_name, (long) diff1,
(int) (diff2 >= 0 ? '+' : '-'), /* char format: use int */
(long) (diff2 >= 0 ? diff2 : -diff2));
} else {
duk_fb_sprintf(fb, "%s %ld, %ld, %ld",
(const char *) op_name, (long) DUK_DEC_A(ins),
(long) DUK_DEC_B(ins), (long) DUK_DEC_C(ins));
}
}
DUK_LOCAL void duk__print_opcode(duk__dprint_state *st, duk_small_int_t opcode) {
duk_fixedbuffer *fb = st->fb;
if (opcode < DUK_BC_OP_MIN || opcode > DUK_BC_OP_MAX) {
duk_fb_sprintf(fb, "?(%ld)", (long) opcode);
} else {
duk_fb_sprintf(fb, "%s", (const char *) duk__bc_optab[opcode]);
}
}
DUK_INTERNAL duk_int_t duk_debug_vsnprintf(char *str, duk_size_t size, const char *format, va_list ap) {
duk_fixedbuffer fb;
const char *p = format;
const char *p_end = p + DUK_STRLEN(format);
duk_int_t retval;
DUK_MEMZERO(&fb, sizeof(fb));
fb.buffer = (duk_uint8_t *) str;
fb.length = size;
fb.offset = 0;
fb.truncated = 0;
while (p < p_end) {
char ch = *p++;
const char *p_begfmt = NULL;
duk_bool_t got_exclamation = 0;
duk_bool_t got_long = 0; /* %lf, %ld etc */
duk__dprint_state st;
if (ch != DUK_ASC_PERCENT) {
duk_fb_put_byte(&fb, (duk_uint8_t) ch);
continue;
}
/*
* Format tag parsing. Since we don't understand all the
* possible format tags allowed, we just scan for a terminating
* specifier and keep track of relevant modifiers that we do
* understand. See man 3 printf.
*/
DUK_MEMZERO(&st, sizeof(st));
st.fb = &fb;
st.depth = 0;
st.depth_limit = 1;
st.loop_stack_index = 0;
st.loop_stack_limit = DUK__LOOP_STACK_DEPTH;
p_begfmt = p - 1;
while (p < p_end) {
ch = *p++;
if (ch == DUK_ASC_STAR) {
/* unsupported: would consume multiple args */
goto error;
} else if (ch == DUK_ASC_PERCENT) {
duk_fb_put_byte(&fb, (duk_uint8_t) DUK_ASC_PERCENT);
break;
} else if (ch == DUK_ASC_EXCLAMATION) {
got_exclamation = 1;
} else if (!got_exclamation && ch == DUK_ASC_LC_L) {
got_long = 1;
} else if (got_exclamation && ch == DUK_ASC_LC_D) {
st.depth_limit = DUK__DEEP_DEPTH_LIMIT;
} else if (got_exclamation && ch == DUK_ASC_LC_P) {
st.follow_proto = 1;
} else if (got_exclamation && ch == DUK_ASC_LC_I) {
st.internal = 1;
} else if (got_exclamation && ch == DUK_ASC_LC_X) {
st.hexdump = 1;
} else if (got_exclamation && ch == DUK_ASC_LC_H) {
st.heavy = 1;
} else if (got_exclamation && ch == DUK_ASC_ATSIGN) {
st.pointer = 1;
} else if (got_exclamation && ch == DUK_ASC_HASH) {
st.binary = 1;
} else if (got_exclamation && ch == DUK_ASC_UC_T) {
duk_tval *t = va_arg(ap, duk_tval *);
if (st.pointer && !st.heavy) {
duk_fb_sprintf(&fb, "(%p)", (void *) t);
}
duk__print_tval(&st, t);
break;
} else if (got_exclamation && ch == DUK_ASC_UC_O) {
duk_heaphdr *t = va_arg(ap, duk_heaphdr *);
if (st.pointer && !st.heavy) {
duk_fb_sprintf(&fb, "(%p)", (void *) t);
}
duk__print_heaphdr(&st, t);
break;
} else if (got_exclamation && ch == DUK_ASC_UC_I) {
duk_instr_t t = va_arg(ap, duk_instr_t);
duk__print_instr(&st, t);
break;
} else if (got_exclamation && ch == DUK_ASC_UC_C) {
long t = va_arg(ap, long);
duk__print_opcode(&st, (duk_small_int_t) t);
break;
} else if (!got_exclamation && strchr(DUK__ALLOWED_STANDARD_SPECIFIERS, (int) ch)) {
char fmtbuf[DUK__MAX_FORMAT_TAG_LENGTH];
duk_size_t fmtlen;
DUK_ASSERT(p >= p_begfmt);
fmtlen = (duk_size_t) (p - p_begfmt);
if (fmtlen >= sizeof(fmtbuf)) {
/* format is too large, abort */
goto error;
}
DUK_MEMZERO(fmtbuf, sizeof(fmtbuf));
DUK_MEMCPY(fmtbuf, p_begfmt, fmtlen);
/* assume exactly 1 arg, which is why '*' is forbidden; arg size still
* depends on type though.
*/
if (ch == DUK_ASC_LC_F || ch == DUK_ASC_LC_G || ch == DUK_ASC_LC_E) {
/* %f and %lf both consume a 'long' */
double arg = va_arg(ap, double);
duk_fb_sprintf(&fb, fmtbuf, arg);
} else if (ch == DUK_ASC_LC_D && got_long) {
/* %ld */
long arg = va_arg(ap, long);
duk_fb_sprintf(&fb, fmtbuf, arg);
} else if (ch == DUK_ASC_LC_D) {
/* %d; only 16 bits are guaranteed */
int arg = va_arg(ap, int);
duk_fb_sprintf(&fb, fmtbuf, arg);
} else if (ch == DUK_ASC_LC_U && got_long) {
/* %lu */
unsigned long arg = va_arg(ap, unsigned long);
duk_fb_sprintf(&fb, fmtbuf, arg);
} else if (ch == DUK_ASC_LC_U) {
/* %u; only 16 bits are guaranteed */
unsigned int arg = va_arg(ap, unsigned int);
duk_fb_sprintf(&fb, fmtbuf, arg);
} else if (ch == DUK_ASC_LC_X && got_long) {
/* %lx */
unsigned long arg = va_arg(ap, unsigned long);
duk_fb_sprintf(&fb, fmtbuf, arg);
} else if (ch == DUK_ASC_LC_X) {
/* %x; only 16 bits are guaranteed */
unsigned int arg = va_arg(ap, unsigned int);
duk_fb_sprintf(&fb, fmtbuf, arg);
} else if (ch == DUK_ASC_LC_S) {
/* %s */
const char *arg = va_arg(ap, const char *);
if (arg == NULL) {
/* '%s' and NULL is not portable, so special case
* it for debug printing.
*/
duk_fb_sprintf(&fb, "NULL");
} else {
duk_fb_sprintf(&fb, fmtbuf, arg);
}
} else if (ch == DUK_ASC_LC_P) {
/* %p */
void *arg = va_arg(ap, void *);
if (arg == NULL) {
/* '%p' and NULL is portable, but special case it
* anyway to get a standard NULL marker in logs.
*/
duk_fb_sprintf(&fb, "NULL");
} else {
duk_fb_sprintf(&fb, fmtbuf, arg);
}
} else if (ch == DUK_ASC_LC_C) {
/* '%c', passed concretely as int */
int arg = va_arg(ap, int);
duk_fb_sprintf(&fb, fmtbuf, arg);
} else {
/* Should not happen. */
duk_fb_sprintf(&fb, "INVALID-FORMAT(%s)", (const char *) fmtbuf);
}
break;
} else {
/* ignore */
}
}
}
goto done;
error:
duk_fb_put_cstring(&fb, "FMTERR");
/* fall through */
done:
retval = (duk_int_t) fb.offset;
duk_fb_put_byte(&fb, (duk_uint8_t) 0);
/* return total chars written excluding terminator */
return retval;
}
#if 0 /*unused*/
DUK_INTERNAL duk_int_t duk_debug_snprintf(char *str, duk_size_t size, const char *format, ...) {
duk_int_t retval;
va_list ap;
va_start(ap, format);
retval = duk_debug_vsnprintf(str, size, format, ap);
va_end(ap);
return retval;
}
#endif
/* Formatting function pointers is tricky: there is no standard pointer for
* function pointers and the size of a function pointer may depend on the
* specific pointer type. This helper formats a function pointer based on
* its memory layout to get something useful on most platforms.
*/
DUK_INTERNAL void duk_debug_format_funcptr(char *buf, duk_size_t buf_size, duk_uint8_t *fptr, duk_size_t fptr_size) {
duk_size_t i;
duk_uint8_t *p = (duk_uint8_t *) buf;
duk_uint8_t *p_end = (duk_uint8_t *) (buf + buf_size - 1);
DUK_MEMZERO(buf, buf_size);
for (i = 0; i < fptr_size; i++) {
duk_int_t left = (duk_int_t) (p_end - p);
duk_uint8_t ch;
if (left <= 0) {
break;
}
/* Quite approximate but should be useful for little and big endian. */
#ifdef DUK_USE_INTEGER_BE
ch = fptr[i];
#else
ch = fptr[fptr_size - 1 - i];
#endif
p += DUK_SNPRINTF((char *) p, left, "%02lx", (unsigned long) ch);
}
}
#endif /* DUK_USE_DEBUG */
#line 1 "duk_debugger.c"
/*
* Duktape debugger
*/
/* include removed: duk_internal.h */
#if defined(DUK_USE_DEBUGGER_SUPPORT)
/*
* Helper structs
*/
typedef union {
void *p;
duk_uint_t b[1];
/* Use b[] to access the size of the union, which is strictly not
* correct. Can't use fixed size unless there's feature detection
* for pointer byte size.
*/
} duk__ptr_union;
/*
* Detach handling
*/
#define DUK__SET_CONN_BROKEN(thr,reason) do { \
/* For now shared handler is fine. */ \
duk__debug_do_detach1((thr)->heap, (reason)); \
} while (0)
DUK_LOCAL void duk__debug_do_detach1(duk_heap *heap, duk_int_t reason) {
/* Can be called multiple times with no harm. Mark the transport
* bad (dbg_read_cb == NULL) and clear state except for the detached
* callback and the udata field. The detached callback is delayed
* to the message loop so that it can be called between messages;
* this avoids corner cases related to immediate debugger reattach
* inside the detached callback.
*/
if (heap->dbg_detaching) {
DUK_D(DUK_DPRINT("debugger already detaching, ignore detach1"));
return;
}
DUK_D(DUK_DPRINT("debugger transport detaching, marking transport broken"));
heap->dbg_detaching = 1; /* prevent multiple in-progress detaches */
if (heap->dbg_write_cb != NULL) {
duk_hthread *thr;
thr = heap->heap_thread;
DUK_ASSERT(thr != NULL);
duk_debug_write_notify(thr, DUK_DBG_CMD_DETACHING);
duk_debug_write_int(thr, reason);
duk_debug_write_eom(thr);
}
heap->dbg_read_cb = NULL;
heap->dbg_write_cb = NULL;
heap->dbg_peek_cb = NULL;
heap->dbg_read_flush_cb = NULL;
heap->dbg_write_flush_cb = NULL;
heap->dbg_request_cb = NULL;
/* heap->dbg_detached_cb: keep */
/* heap->dbg_udata: keep */
/* heap->dbg_processing: keep on purpose to avoid debugger re-entry in detaching state */
heap->dbg_paused = 0;
heap->dbg_state_dirty = 0;
heap->dbg_force_restart = 0;
heap->dbg_step_type = 0;
heap->dbg_step_thread = NULL;
heap->dbg_step_csindex = 0;
heap->dbg_step_startline = 0;
heap->dbg_have_next_byte = 0;
/* Ensure there are no stale active breakpoint pointers.
* Breakpoint list is currently kept - we could empty it
* here but we'd need to handle refcounts correctly, and
* we'd need a 'thr' reference for that.
*
* XXX: clear breakpoint on either attach or detach?
*/
heap->dbg_breakpoints_active[0] = (duk_breakpoint *) NULL;
}
DUK_LOCAL void duk__debug_do_detach2(duk_heap *heap) {
duk_debug_detached_function detached_cb;
void *detached_udata;
/* Safe to call multiple times. */
detached_cb = heap->dbg_detached_cb;
detached_udata = heap->dbg_udata;
heap->dbg_detached_cb = NULL;
heap->dbg_udata = NULL;
if (detached_cb) {
/* Careful here: state must be wiped before the call
* so that we can cleanly handle a re-attach from
* inside the callback.
*/
DUK_D(DUK_DPRINT("detached during message loop, delayed call to detached_cb"));
detached_cb(detached_udata);
}
heap->dbg_detaching = 0;
}
DUK_INTERNAL void duk_debug_do_detach(duk_heap *heap) {
duk__debug_do_detach1(heap, 0);
duk__debug_do_detach2(heap);
}
/* Called on a read/write error: NULL all callbacks except the detached
* callback so that we never accidentally call them after a read/write
* error has been indicated. This is especially important for the transport
* I/O callbacks to fulfill guaranteed callback semantics.
*/
DUK_LOCAL void duk__debug_null_most_callbacks(duk_hthread *thr) {
duk_heap *heap;
heap = thr->heap;
DUK_D(DUK_DPRINT("transport read/write error, NULL all callbacks expected detached"));
heap->dbg_read_cb = NULL;
heap->dbg_write_cb = NULL; /* this is especially critical to avoid another write call in detach1() */
heap->dbg_peek_cb = NULL;
heap->dbg_read_flush_cb = NULL;
heap->dbg_write_flush_cb = NULL;
heap->dbg_request_cb = NULL;
/* keep heap->dbg_detached_cb */
}
/*
* Debug connection peek and flush primitives
*/
DUK_INTERNAL duk_bool_t duk_debug_read_peek(duk_hthread *thr) {
duk_heap *heap;
DUK_ASSERT(thr != NULL);
heap = thr->heap;
DUK_ASSERT(heap != NULL);
if (heap->dbg_read_cb == NULL) {
DUK_D(DUK_DPRINT("attempt to peek in detached state, return zero (= no data)"));
return 0;
}
if (heap->dbg_peek_cb == NULL) {
DUK_DD(DUK_DDPRINT("no peek callback, return zero (= no data)"));
return 0;
}
return (duk_bool_t) (heap->dbg_peek_cb(heap->dbg_udata) > 0);
}
DUK_INTERNAL void duk_debug_read_flush(duk_hthread *thr) {
duk_heap *heap;
DUK_ASSERT(thr != NULL);
heap = thr->heap;
DUK_ASSERT(heap != NULL);
if (heap->dbg_read_cb == NULL) {
DUK_D(DUK_DPRINT("attempt to read flush in detached state, ignore"));
return;
}
if (heap->dbg_read_flush_cb == NULL) {
DUK_DD(DUK_DDPRINT("no read flush callback, ignore"));
return;
}
heap->dbg_read_flush_cb(heap->dbg_udata);
}
DUK_INTERNAL void duk_debug_write_flush(duk_hthread *thr) {
duk_heap *heap;
DUK_ASSERT(thr != NULL);
heap = thr->heap;
DUK_ASSERT(heap != NULL);
if (heap->dbg_read_cb == NULL) {
DUK_D(DUK_DPRINT("attempt to write flush in detached state, ignore"));
return;
}
if (heap->dbg_write_flush_cb == NULL) {
DUK_DD(DUK_DDPRINT("no write flush callback, ignore"));
return;
}
heap->dbg_write_flush_cb(heap->dbg_udata);
}
/*
* Debug connection skip primitives
*/
/* Skip fully. */
DUK_INTERNAL void duk_debug_skip_bytes(duk_hthread *thr, duk_size_t length) {
duk_uint8_t dummy[64];
duk_size_t now;
DUK_ASSERT(thr != NULL);
while (length > 0) {
now = (length > sizeof(dummy) ? sizeof(dummy) : length);
duk_debug_read_bytes(thr, dummy, now);
length -= now;
}
}
DUK_INTERNAL void duk_debug_skip_byte(duk_hthread *thr) {
DUK_ASSERT(thr != NULL);
(void) duk_debug_read_byte(thr);
}
/*
* Debug connection read primitives
*/
/* Peek ahead in the stream one byte. */
DUK_INTERNAL uint8_t duk_debug_peek_byte(duk_hthread *thr) {
/* It is important not to call this if the last byte read was an EOM.
* Reading ahead in this scenario would cause unnecessary blocking if
* another message is not available.
*/
duk_uint8_t x;
x = duk_debug_read_byte(thr);
thr->heap->dbg_have_next_byte = 1;
thr->heap->dbg_next_byte = x;
return x;
}
/* Read fully. */
DUK_INTERNAL void duk_debug_read_bytes(duk_hthread *thr, duk_uint8_t *data, duk_size_t length) {
duk_heap *heap;
duk_uint8_t *p;
duk_size_t left;
duk_size_t got;
DUK_ASSERT(thr != NULL);
heap = thr->heap;
DUK_ASSERT(heap != NULL);
if (heap->dbg_read_cb == NULL) {
DUK_D(DUK_DPRINT("attempt to read %ld bytes in detached state, return zero data", (long) length));
goto fail;
}
/* NOTE: length may be zero */
p = data;
if (length >= 1 && heap->dbg_have_next_byte) {
heap->dbg_have_next_byte = 0;
*p++ = heap->dbg_next_byte;
}
for (;;) {
left = (duk_size_t) ((data + length) - p);
if (left == 0) {
break;
}
DUK_ASSERT(heap->dbg_read_cb != NULL);
DUK_ASSERT(left >= 1);
#if defined(DUK_USE_DEBUGGER_TRANSPORT_TORTURE)
left = 1;
#endif
got = heap->dbg_read_cb(heap->dbg_udata, (char *) p, left);
if (got == 0 || got > left) {
DUK_D(DUK_DPRINT("connection error during read, return zero data"));
duk__debug_null_most_callbacks(thr); /* avoid calling write callback in detach1() */
DUK__SET_CONN_BROKEN(thr, 1);
goto fail;
}
p += got;
}
return;
fail:
DUK_MEMZERO((void *) data, (size_t) length);
}
DUK_INTERNAL duk_uint8_t duk_debug_read_byte(duk_hthread *thr) {
duk_uint8_t x;
x = 0; /* just in case callback is broken and won't write 'x' */
duk_debug_read_bytes(thr, &x, 1);
return x;
}
DUK_LOCAL duk_uint32_t duk__debug_read_uint32_raw(duk_hthread *thr) {
duk_uint8_t buf[4];
DUK_ASSERT(thr != NULL);
duk_debug_read_bytes(thr, buf, 4);
return ((duk_uint32_t) buf[0] << 24) |
((duk_uint32_t) buf[1] << 16) |
((duk_uint32_t) buf[2] << 8) |
(duk_uint32_t) buf[3];
}
DUK_LOCAL duk_uint32_t duk__debug_read_int32_raw(duk_hthread *thr) {
return (duk_int32_t) duk__debug_read_uint32_raw(thr);
}
DUK_LOCAL duk_uint16_t duk__debug_read_uint16_raw(duk_hthread *thr) {
duk_uint8_t buf[2];
DUK_ASSERT(thr != NULL);
duk_debug_read_bytes(thr, buf, 2);
return ((duk_uint16_t) buf[0] << 8) |
(duk_uint16_t) buf[1];
}
DUK_INTERNAL duk_int32_t duk_debug_read_int(duk_hthread *thr) {
duk_small_uint_t x;
duk_small_uint_t t;
DUK_ASSERT(thr != NULL);
x = duk_debug_read_byte(thr);
if (x >= 0xc0) {
t = duk_debug_read_byte(thr);
return (duk_int32_t) (((x - 0xc0) << 8) + t);
} else if (x >= 0x80) {
return (duk_int32_t) (x - 0x80);
} else if (x == DUK_DBG_IB_INT4) {
return (duk_int32_t) duk__debug_read_uint32_raw(thr);
}
DUK_D(DUK_DPRINT("debug connection error: failed to decode int"));
DUK__SET_CONN_BROKEN(thr, 1);
return 0;
}
DUK_LOCAL duk_hstring *duk__debug_read_hstring_raw(duk_hthread *thr, duk_uint32_t len) {
duk_context *ctx = (duk_context *) thr;
duk_uint8_t buf[31];
duk_uint8_t *p;
if (len <= sizeof(buf)) {
duk_debug_read_bytes(thr, buf, (duk_size_t) len);
duk_push_lstring(ctx, (const char *) buf, (duk_size_t) len);
} else {
p = (duk_uint8_t *) duk_push_fixed_buffer(ctx, (duk_size_t) len);
DUK_ASSERT(p != NULL);
duk_debug_read_bytes(thr, p, (duk_size_t) len);
duk_to_string(ctx, -1);
}
return duk_require_hstring(ctx, -1);
}
DUK_INTERNAL duk_hstring *duk_debug_read_hstring(duk_hthread *thr) {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_t x;
duk_uint32_t len;
DUK_ASSERT(thr != NULL);
x = duk_debug_read_byte(thr);
if (x >= 0x60 && x <= 0x7f) {
/* For short strings, use a fixed temp buffer. */
len = (duk_uint32_t) (x - 0x60);
} else if (x == DUK_DBG_IB_STR2) {
len = (duk_uint32_t) duk__debug_read_uint16_raw(thr);
} else if (x == DUK_DBG_IB_STR4) {
len = (duk_uint32_t) duk__debug_read_uint32_raw(thr);
} else {
goto fail;
}
return duk__debug_read_hstring_raw(thr, len);
fail:
DUK_D(DUK_DPRINT("debug connection error: failed to decode int"));
DUK__SET_CONN_BROKEN(thr, 1);
duk_push_hstring_stridx(thr, DUK_STRIDX_EMPTY_STRING); /* always push some string */
return duk_require_hstring(ctx, -1);
}
DUK_LOCAL duk_hbuffer *duk__debug_read_hbuffer_raw(duk_hthread *thr, duk_uint32_t len) {
duk_context *ctx = (duk_context *) thr;
duk_uint8_t *p;
p = (duk_uint8_t *) duk_push_fixed_buffer(ctx, (duk_size_t) len);
DUK_ASSERT(p != NULL);
duk_debug_read_bytes(thr, p, (duk_size_t) len);
return duk_require_hbuffer(ctx, -1);
}
DUK_LOCAL void *duk__debug_read_pointer_raw(duk_hthread *thr) {
duk_small_uint_t x;
duk__ptr_union pu;
DUK_ASSERT(thr != NULL);
x = duk_debug_read_byte(thr);
if (x != sizeof(pu)) {
goto fail;
}
duk_debug_read_bytes(thr, (duk_uint8_t *) &pu.p, sizeof(pu));
#if defined(DUK_USE_INTEGER_LE)
duk_byteswap_bytes((duk_uint8_t *) pu.b, sizeof(pu));
#endif
return (void *) pu.p;
fail:
DUK_D(DUK_DPRINT("debug connection error: failed to decode pointer"));
DUK__SET_CONN_BROKEN(thr, 1);
return (void *) NULL;
}
DUK_LOCAL duk_double_t duk__debug_read_double_raw(duk_hthread *thr) {
duk_double_union du;
DUK_ASSERT(sizeof(du.uc) == 8);
duk_debug_read_bytes(thr, (duk_uint8_t *) du.uc, sizeof(du.uc));
DUK_DBLUNION_DOUBLE_NTOH(&du);
return du.d;
}
#if 0
DUK_INTERNAL duk_heaphdr *duk_debug_read_heapptr(duk_hthread *thr) {
duk_small_uint_t x;
DUK_ASSERT(thr != NULL);
x = duk_debug_read_byte(thr);
if (x != DUK_DBG_IB_HEAPPTR) {
goto fail;
}
return (duk_heaphdr *) duk__debug_read_pointer_raw(thr);
fail:
DUK_D(DUK_DPRINT("debug connection error: failed to decode heapptr"));
DUK__SET_CONN_BROKEN(thr, 1);
return NULL;
}
#endif
DUK_INTERNAL duk_heaphdr *duk_debug_read_any_ptr(duk_hthread *thr) {
duk_small_uint_t x;
DUK_ASSERT(thr != NULL);
x = duk_debug_read_byte(thr);
switch (x) {
case DUK_DBG_IB_OBJECT:
case DUK_DBG_IB_POINTER:
case DUK_DBG_IB_HEAPPTR:
/* Accept any pointer-like value; for 'object' dvalue, read
* and ignore the class number.
*/
if (x == DUK_DBG_IB_OBJECT) {
duk_debug_skip_byte(thr);
}
break;
default:
goto fail;
}
return (duk_heaphdr *) duk__debug_read_pointer_raw(thr);
fail:
DUK_D(DUK_DPRINT("debug connection error: failed to decode any pointer (object, pointer, heapptr)"));
DUK__SET_CONN_BROKEN(thr, 1);
return NULL;
}
DUK_INTERNAL duk_tval *duk_debug_read_tval(duk_hthread *thr) {
duk_context *ctx = (duk_context *) thr;
duk_uint8_t x;
duk_uint_t t;
duk_uint32_t len;
DUK_ASSERT(thr != NULL);
x = duk_debug_read_byte(thr);
if (x >= 0xc0) {
t = (duk_uint_t) (x - 0xc0);
t = (t << 8) + duk_debug_read_byte(thr);
duk_push_uint(ctx, (duk_uint_t) t);
goto return_ptr;
}
if (x >= 0x80) {
duk_push_uint(ctx, (duk_uint_t) (x - 0x80));
goto return_ptr;
}
if (x >= 0x60) {
len = (duk_uint32_t) (x - 0x60);
duk__debug_read_hstring_raw(thr, len);
goto return_ptr;
}
switch (x) {
case DUK_DBG_IB_INT4: {
duk_int32_t i = duk__debug_read_int32_raw(thr);
duk_push_i32(ctx, i);
break;
}
case DUK_DBG_IB_STR4: {
len = duk__debug_read_uint32_raw(thr);
duk__debug_read_hstring_raw(thr, len);
break;
}
case DUK_DBG_IB_STR2: {
len = duk__debug_read_uint16_raw(thr);
duk__debug_read_hstring_raw(thr, len);
break;
}
case DUK_DBG_IB_BUF4: {
len = duk__debug_read_uint32_raw(thr);
duk__debug_read_hbuffer_raw(thr, len);
break;
}
case DUK_DBG_IB_BUF2: {
len = duk__debug_read_uint16_raw(thr);
duk__debug_read_hbuffer_raw(thr, len);
break;
}
case DUK_DBG_IB_UNDEFINED: {
duk_push_undefined(ctx);
break;
}
case DUK_DBG_IB_NULL: {
duk_push_null(ctx);
break;
}
case DUK_DBG_IB_TRUE: {
duk_push_true(ctx);
break;
}
case DUK_DBG_IB_FALSE: {
duk_push_false(ctx);
break;
}
case DUK_DBG_IB_NUMBER: {
duk_double_t d;
d = duk__debug_read_double_raw(thr);
duk_push_number(ctx, d);
break;
}
case DUK_DBG_IB_OBJECT: {
duk_heaphdr *h;
duk_debug_skip_byte(thr);
h = (duk_heaphdr *) duk__debug_read_pointer_raw(thr);
duk_push_heapptr(thr, (void *) h);
break;
}
case DUK_DBG_IB_POINTER: {
void *ptr;
ptr = duk__debug_read_pointer_raw(thr);
duk_push_pointer(thr, ptr);
break;
}
case DUK_DBG_IB_LIGHTFUNC: {
/* XXX: Not needed for now, so not implemented. Note that
* function pointers may have different size/layout than
* a void pointer.
*/
DUK_D(DUK_DPRINT("reading lightfunc values unimplemented"));
goto fail;
}
case DUK_DBG_IB_HEAPPTR: {
duk_heaphdr *h;
h = (duk_heaphdr *) duk__debug_read_pointer_raw(thr);
duk_push_heapptr(thr, (void *) h);
break;
}
case DUK_DBG_IB_UNUSED: /* unused: not accepted in inbound messages */
default:
goto fail;
}
return_ptr:
return DUK_GET_TVAL_NEGIDX(thr, -1);
fail:
DUK_D(DUK_DPRINT("debug connection error: failed to decode tval"));
DUK__SET_CONN_BROKEN(thr, 1);
return NULL;
}
/*
* Debug connection write primitives
*/
/* Write fully. */
DUK_INTERNAL void duk_debug_write_bytes(duk_hthread *thr, const duk_uint8_t *data, duk_size_t length) {
duk_heap *heap;
const duk_uint8_t *p;
duk_size_t left;
duk_size_t got;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(length == 0 || data != NULL);
heap = thr->heap;
DUK_ASSERT(heap != NULL);
if (heap->dbg_write_cb == NULL) {
DUK_D(DUK_DPRINT("attempt to write %ld bytes in detached state, ignore", (long) length));
return;
}
if (length == 0) {
/* Avoid doing an actual write callback with length == 0,
* because that's reserved for a write flush.
*/
return;
}
DUK_ASSERT(data != NULL);
p = data;
for (;;) {
left = (duk_size_t) ((data + length) - p);
if (left == 0) {
break;
}
DUK_ASSERT(heap->dbg_write_cb != NULL);
DUK_ASSERT(left >= 1);
#if defined(DUK_USE_DEBUGGER_TRANSPORT_TORTURE)
left = 1;
#endif
got = heap->dbg_write_cb(heap->dbg_udata, (const char *) p, left);
if (got == 0 || got > left) {
duk__debug_null_most_callbacks(thr); /* avoid calling write callback in detach1() */
DUK_D(DUK_DPRINT("connection error during write"));
DUK__SET_CONN_BROKEN(thr, 1);
return;
}
p += got;
}
}
DUK_INTERNAL void duk_debug_write_byte(duk_hthread *thr, duk_uint8_t x) {
duk_debug_write_bytes(thr, (const duk_uint8_t *) &x, 1);
}
DUK_INTERNAL void duk_debug_write_unused(duk_hthread *thr) {
duk_debug_write_byte(thr, DUK_DBG_IB_UNUSED);
}
DUK_INTERNAL void duk_debug_write_undefined(duk_hthread *thr) {
duk_debug_write_byte(thr, DUK_DBG_IB_UNDEFINED);
}
#if defined(DUK_USE_DEBUGGER_INSPECT)
DUK_INTERNAL void duk_debug_write_null(duk_hthread *thr) {
duk_debug_write_byte(thr, DUK_DBG_IB_NULL);
}
#endif
DUK_INTERNAL void duk_debug_write_boolean(duk_hthread *thr, duk_uint_t val) {
duk_debug_write_byte(thr, val ? DUK_DBG_IB_TRUE : DUK_DBG_IB_FALSE);
}
/* Write signed 32-bit integer. */
DUK_INTERNAL void duk_debug_write_int(duk_hthread *thr, duk_int32_t x) {
duk_uint8_t buf[5];
duk_size_t len;
DUK_ASSERT(thr != NULL);
if (x >= 0 && x <= 0x3fL) {
buf[0] = (duk_uint8_t) (0x80 + x);
len = 1;
} else if (x >= 0 && x <= 0x3fffL) {
buf[0] = (duk_uint8_t) (0xc0 + (x >> 8));
buf[1] = (duk_uint8_t) (x & 0xff);
len = 2;
} else {
/* Signed integers always map to 4 bytes now. */
buf[0] = (duk_uint8_t) DUK_DBG_IB_INT4;
buf[1] = (duk_uint8_t) ((x >> 24) & 0xff);
buf[2] = (duk_uint8_t) ((x >> 16) & 0xff);
buf[3] = (duk_uint8_t) ((x >> 8) & 0xff);
buf[4] = (duk_uint8_t) (x & 0xff);
len = 5;
}
duk_debug_write_bytes(thr, buf, len);
}
/* Write unsigned 32-bit integer. */
DUK_INTERNAL void duk_debug_write_uint(duk_hthread *thr, duk_uint32_t x) {
/* The debugger protocol doesn't support a plain integer encoding for
* the full 32-bit unsigned range (only 32-bit signed). For now,
* unsigned 32-bit values simply written as signed ones. This is not
* a concrete issue except for 32-bit heaphdr fields. Proper solutions
* would be to (a) write such integers as IEEE doubles or (b) add an
* unsigned 32-bit dvalue.
*/
if (x >= 0x80000000UL) {
DUK_D(DUK_DPRINT("writing unsigned integer 0x%08lx as signed integer",
(long) x));
}
duk_debug_write_int(thr, (duk_int32_t) x);
}
DUK_INTERNAL void duk_debug_write_strbuf(duk_hthread *thr, const char *data, duk_size_t length, duk_uint8_t marker_base) {
duk_uint8_t buf[5];
duk_size_t buflen;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(length == 0 || data != NULL);
if (length <= 0x1fUL && marker_base == DUK_DBG_IB_STR4) {
/* For strings, special form for short lengths. */
buf[0] = (duk_uint8_t) (0x60 + length);
buflen = 1;
} else if (length <= 0xffffUL) {
buf[0] = (duk_uint8_t) (marker_base + 1);
buf[1] = (duk_uint8_t) (length >> 8);
buf[2] = (duk_uint8_t) (length & 0xff);
buflen = 3;
} else {
buf[0] = (duk_uint8_t) marker_base;
buf[1] = (duk_uint8_t) (length >> 24);
buf[2] = (duk_uint8_t) ((length >> 16) & 0xff);
buf[3] = (duk_uint8_t) ((length >> 8) & 0xff);
buf[4] = (duk_uint8_t) (length & 0xff);
buflen = 5;
}
duk_debug_write_bytes(thr, (const duk_uint8_t *) buf, buflen);
duk_debug_write_bytes(thr, (const duk_uint8_t *) data, length);
}
DUK_INTERNAL void duk_debug_write_string(duk_hthread *thr, const char *data, duk_size_t length) {
duk_debug_write_strbuf(thr, data, length, DUK_DBG_IB_STR4);
}
DUK_INTERNAL void duk_debug_write_cstring(duk_hthread *thr, const char *data) {
DUK_ASSERT(thr != NULL);
duk_debug_write_string(thr,
data,
data ? DUK_STRLEN(data) : 0);
}
DUK_INTERNAL void duk_debug_write_hstring(duk_hthread *thr, duk_hstring *h) {
DUK_ASSERT(thr != NULL);
/* XXX: differentiate null pointer from empty string? */
duk_debug_write_string(thr,
(h != NULL ? (const char *) DUK_HSTRING_GET_DATA(h) : NULL),
(h != NULL ? (duk_size_t) DUK_HSTRING_GET_BYTELEN(h) : 0));
}
DUK_LOCAL void duk__debug_write_hstring_safe_top(duk_hthread *thr) {
duk_context *ctx = (duk_context *) thr;
duk_debug_write_hstring(thr, duk_safe_to_hstring(ctx, -1));
}
DUK_INTERNAL void duk_debug_write_buffer(duk_hthread *thr, const char *data, duk_size_t length) {
duk_debug_write_strbuf(thr, data, length, DUK_DBG_IB_BUF4);
}
DUK_INTERNAL void duk_debug_write_hbuffer(duk_hthread *thr, duk_hbuffer *h) {
DUK_ASSERT(thr != NULL);
duk_debug_write_buffer(thr,
(h != NULL ? (const char *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h) : NULL),
(h != NULL ? (duk_size_t) DUK_HBUFFER_GET_SIZE(h) : 0));
}
DUK_LOCAL void duk__debug_write_pointer_raw(duk_hthread *thr, void *ptr, duk_uint8_t ibyte) {
duk_uint8_t buf[2];
duk__ptr_union pu;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(sizeof(ptr) >= 1 && sizeof(ptr) <= 16);
/* ptr may be NULL */
buf[0] = ibyte;
buf[1] = sizeof(pu);
duk_debug_write_bytes(thr, buf, 2);
pu.p = (void *) ptr;
#if defined(DUK_USE_INTEGER_LE)
duk_byteswap_bytes((duk_uint8_t *) pu.b, sizeof(pu));
#endif
duk_debug_write_bytes(thr, (const duk_uint8_t *) &pu.p, (duk_size_t) sizeof(pu));
}
DUK_INTERNAL void duk_debug_write_pointer(duk_hthread *thr, void *ptr) {
duk__debug_write_pointer_raw(thr, ptr, DUK_DBG_IB_POINTER);
}
#if defined(DUK_USE_DEBUGGER_DUMPHEAP) || defined(DUK_USE_DEBUGGER_INSPECT)
DUK_INTERNAL void duk_debug_write_heapptr(duk_hthread *thr, duk_heaphdr *h) {
duk__debug_write_pointer_raw(thr, (void *) h, DUK_DBG_IB_HEAPPTR);
}
#endif /* DUK_USE_DEBUGGER_DUMPHEAP || DUK_USE_DEBUGGER_INSPECT */
DUK_INTERNAL void duk_debug_write_hobject(duk_hthread *thr, duk_hobject *obj) {
duk_uint8_t buf[3];
duk__ptr_union pu;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(sizeof(obj) >= 1 && sizeof(obj) <= 16);
DUK_ASSERT(obj != NULL);
buf[0] = DUK_DBG_IB_OBJECT;
buf[1] = (duk_uint8_t) DUK_HOBJECT_GET_CLASS_NUMBER(obj);
buf[2] = sizeof(pu);
duk_debug_write_bytes(thr, buf, 3);
pu.p = (void *) obj;
#if defined(DUK_USE_INTEGER_LE)
duk_byteswap_bytes((duk_uint8_t *) pu.b, sizeof(pu));
#endif
duk_debug_write_bytes(thr, (const duk_uint8_t *) &pu.p, (duk_size_t) sizeof(pu));
}
DUK_INTERNAL void duk_debug_write_tval(duk_hthread *thr, duk_tval *tv) {
duk_c_function lf_func;
duk_small_uint_t lf_flags;
duk_uint8_t buf[4];
duk_double_union du1;
duk_double_union du2;
duk_int32_t i32;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(tv != NULL);
switch (DUK_TVAL_GET_TAG(tv)) {
case DUK_TAG_UNDEFINED:
duk_debug_write_byte(thr, DUK_DBG_IB_UNDEFINED);
break;
case DUK_TAG_UNUSED:
duk_debug_write_byte(thr, DUK_DBG_IB_UNUSED);
break;
case DUK_TAG_NULL:
duk_debug_write_byte(thr, DUK_DBG_IB_NULL);
break;
case DUK_TAG_BOOLEAN:
DUK_ASSERT(DUK_TVAL_GET_BOOLEAN(tv) == 0 ||
DUK_TVAL_GET_BOOLEAN(tv) == 1);
duk_debug_write_boolean(thr, DUK_TVAL_GET_BOOLEAN(tv));
break;
case DUK_TAG_POINTER:
duk_debug_write_pointer(thr, (void *) DUK_TVAL_GET_POINTER(tv));
break;
case DUK_TAG_LIGHTFUNC:
DUK_TVAL_GET_LIGHTFUNC(tv, lf_func, lf_flags);
buf[0] = DUK_DBG_IB_LIGHTFUNC;
buf[1] = (duk_uint8_t) (lf_flags >> 8);
buf[2] = (duk_uint8_t) (lf_flags & 0xff);
buf[3] = sizeof(lf_func);
duk_debug_write_bytes(thr, buf, 4);
duk_debug_write_bytes(thr, (const duk_uint8_t *) &lf_func, sizeof(lf_func));
break;
case DUK_TAG_STRING:
duk_debug_write_hstring(thr, DUK_TVAL_GET_STRING(tv));
break;
case DUK_TAG_OBJECT:
duk_debug_write_hobject(thr, DUK_TVAL_GET_OBJECT(tv));
break;
case DUK_TAG_BUFFER:
duk_debug_write_hbuffer(thr, DUK_TVAL_GET_BUFFER(tv));
break;
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT:
#endif
default:
/* Numbers are normalized to big (network) endian. We can
* (but are not required) to use integer dvalues when there's
* no loss of precision.
*
* XXX: share check with other code; this check is slow but
* reliable and doesn't require careful exponent/mantissa
* mask tricks as in the fastint downgrade code.
*/
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
du1.d = DUK_TVAL_GET_NUMBER(tv);
i32 = (duk_int32_t) du1.d;
du2.d = (duk_double_t) i32;
DUK_DD(DUK_DDPRINT("i32=%ld du1=%02x%02x%02x%02x%02x%02x%02x%02x "
"du2=%02x%02x%02x%02x%02x%02x%02x%02x",
(long) i32,
(unsigned int) du1.uc[0], (unsigned int) du1.uc[1],
(unsigned int) du1.uc[2], (unsigned int) du1.uc[3],
(unsigned int) du1.uc[4], (unsigned int) du1.uc[5],
(unsigned int) du1.uc[6], (unsigned int) du1.uc[7],
(unsigned int) du2.uc[0], (unsigned int) du2.uc[1],
(unsigned int) du2.uc[2], (unsigned int) du2.uc[3],
(unsigned int) du2.uc[4], (unsigned int) du2.uc[5],
(unsigned int) du2.uc[6], (unsigned int) du2.uc[7]));
if (DUK_MEMCMP((const void *) du1.uc, (const void *) du2.uc, sizeof(du1.uc)) == 0) {
duk_debug_write_int(thr, i32);
} else {
DUK_DBLUNION_DOUBLE_HTON(&du1);
duk_debug_write_byte(thr, DUK_DBG_IB_NUMBER);
duk_debug_write_bytes(thr, (const duk_uint8_t *) du1.uc, sizeof(du1.uc));
}
}
}
#if defined(DUK_USE_DEBUGGER_DUMPHEAP)
/* Variant for writing duk_tvals so that any heap allocated values are
* written out as tagged heap pointers.
*/
DUK_LOCAL void duk__debug_write_tval_heapptr(duk_hthread *thr, duk_tval *tv) {
if (DUK_TVAL_IS_HEAP_ALLOCATED(tv)) {
duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv);
duk_debug_write_heapptr(thr, h);
} else {
duk_debug_write_tval(thr, tv);
}
}
#endif /* DUK_USE_DEBUGGER_DUMPHEAP */
/*
* Debug connection message write helpers
*/
#if 0 /* unused */
DUK_INTERNAL void duk_debug_write_request(duk_hthread *thr, duk_small_uint_t command) {
duk_debug_write_byte(thr, DUK_DBG_IB_REQUEST);
duk_debug_write_int(thr, command);
}
#endif
DUK_INTERNAL void duk_debug_write_reply(duk_hthread *thr) {
duk_debug_write_byte(thr, DUK_DBG_IB_REPLY);
}
DUK_INTERNAL void duk_debug_write_error_eom(duk_hthread *thr, duk_small_uint_t err_code, const char *msg) {
/* Allow NULL 'msg' */
duk_debug_write_byte(thr, DUK_DBG_IB_ERROR);
duk_debug_write_int(thr, (duk_int32_t) err_code);
duk_debug_write_cstring(thr, msg);
duk_debug_write_eom(thr);
}
DUK_INTERNAL void duk_debug_write_notify(duk_hthread *thr, duk_small_uint_t command) {
duk_debug_write_byte(thr, DUK_DBG_IB_NOTIFY);
duk_debug_write_int(thr, command);
}
DUK_INTERNAL void duk_debug_write_eom(duk_hthread *thr) {
duk_debug_write_byte(thr, DUK_DBG_IB_EOM);
/* As an initial implementation, write flush after every EOM (and the
* version identifier). A better implementation would flush only when
* Duktape is finished processing messages so that a flush only happens
* after all outbound messages are finished on that occasion.
*/
duk_debug_write_flush(thr);
}
/*
* Status message and helpers
*/
DUK_INTERNAL duk_uint_fast32_t duk_debug_curr_line(duk_hthread *thr) {
duk_context *ctx = (duk_context *) thr;
duk_activation *act;
duk_uint_fast32_t line;
duk_uint_fast32_t pc;
act = duk_hthread_get_current_activation(thr); /* may be NULL */
if (act == NULL) {
return 0;
}
/* We're conceptually between two opcodes; act->pc indicates the next
* instruction to be executed. This is usually the correct pc/line to
* indicate in Status. (For the 'debugger' statement this now reports
* the pc/line after the debugger statement because the debugger opcode
* has already been executed.)
*/
pc = duk_hthread_get_act_curr_pc(thr, act);
/* XXX: this should be optimized to be a raw query and avoid valstack
* operations if possible.
*/
duk_push_tval(ctx, &act->tv_func);
line = duk_hobject_pc2line_query(ctx, -1, pc);
duk_pop(ctx);
return line;
}
DUK_INTERNAL void duk_debug_send_status(duk_hthread *thr) {
duk_context *ctx = (duk_context *) thr;
duk_activation *act;
duk_debug_write_notify(thr, DUK_DBG_CMD_STATUS);
duk_debug_write_int(thr, thr->heap->dbg_paused);
DUK_ASSERT_DISABLE(thr->callstack_top >= 0); /* unsigned */
if (thr->callstack_top == 0) {
duk_debug_write_undefined(thr);
duk_debug_write_undefined(thr);
duk_debug_write_int(thr, 0);
duk_debug_write_int(thr, 0);
} else {
act = thr->callstack + thr->callstack_top - 1;
duk_push_tval(ctx, &act->tv_func);
duk_get_prop_string(ctx, -1, "fileName");
duk__debug_write_hstring_safe_top(thr);
duk_get_prop_string(ctx, -2, "name");
duk__debug_write_hstring_safe_top(thr);
duk_pop_3(ctx);
/* Report next pc/line to be executed. */
duk_debug_write_uint(thr, (duk_uint32_t) duk_debug_curr_line(thr));
duk_debug_write_uint(thr, (duk_uint32_t) duk_hthread_get_act_curr_pc(thr, act));
}
duk_debug_write_eom(thr);
}
#if defined(DUK_USE_DEBUGGER_THROW_NOTIFY)
DUK_INTERNAL void duk_debug_send_throw(duk_hthread *thr, duk_bool_t fatal) {
/*
* NFY <int: 5> <int: fatal> <str: msg> <str: filename> <int: linenumber> EOM
*/
duk_context *ctx = (duk_context *) thr;
duk_activation *act;
duk_uint32_t pc;
DUK_ASSERT(thr->valstack_top > thr->valstack); /* At least: ... [err] */
duk_debug_write_notify(thr, DUK_DBG_CMD_THROW);
duk_debug_write_int(thr, fatal);
/* Report thrown value to client coerced to string */
duk_dup(ctx, -1);
duk__debug_write_hstring_safe_top(thr);
duk_pop(ctx);
if (duk_is_error(ctx, -1)) {
/* Error instance, use augmented error data directly */
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_FILE_NAME);
duk__debug_write_hstring_safe_top(thr);
duk_get_prop_stridx(ctx, -2, DUK_STRIDX_LINE_NUMBER);
duk_debug_write_uint(thr, duk_get_uint(ctx, -1));
} else {
/* For anything other than an Error instance, we calculate the error
* location directly from the current activation.
*/
act = thr->callstack + thr->callstack_top - 1;
duk_push_tval(ctx, &act->tv_func);
duk_get_prop_string(ctx, -1, "fileName");
duk__debug_write_hstring_safe_top(thr);
pc = duk_hthread_get_act_prev_pc(thr, act);
duk_debug_write_uint(thr, (duk_uint32_t) duk_hobject_pc2line_query(ctx, -2, pc));
}
duk_pop_2(ctx); /* shared pop */
duk_debug_write_eom(thr);
}
#endif /* DUK_USE_DEBUGGER_THROW_NOTIFY */
/*
* Debug message processing
*/
/* Skip dvalue. */
DUK_LOCAL duk_bool_t duk__debug_skip_dvalue(duk_hthread *thr) {
duk_uint8_t x;
duk_uint32_t len;
x = duk_debug_read_byte(thr);
if (x >= 0xc0) {
duk_debug_skip_byte(thr);
return 0;
}
if (x >= 0x80) {
return 0;
}
if (x >= 0x60) {
duk_debug_skip_bytes(thr, x - 0x60);
return 0;
}
switch(x) {
case DUK_DBG_IB_EOM:
return 1; /* Return 1: got EOM */
case DUK_DBG_IB_REQUEST:
case DUK_DBG_IB_REPLY:
case DUK_DBG_IB_ERROR:
case DUK_DBG_IB_NOTIFY:
break;
case DUK_DBG_IB_INT4:
(void) duk__debug_read_uint32_raw(thr);
break;
case DUK_DBG_IB_STR4:
case DUK_DBG_IB_BUF4:
len = duk__debug_read_uint32_raw(thr);
duk_debug_skip_bytes(thr, len);
break;
case DUK_DBG_IB_STR2:
case DUK_DBG_IB_BUF2:
len = duk__debug_read_uint16_raw(thr);
duk_debug_skip_bytes(thr, len);
break;
case DUK_DBG_IB_UNUSED:
case DUK_DBG_IB_UNDEFINED:
case DUK_DBG_IB_NULL:
case DUK_DBG_IB_TRUE:
case DUK_DBG_IB_FALSE:
break;
case DUK_DBG_IB_NUMBER:
duk_debug_skip_bytes(thr, 8);
break;
case DUK_DBG_IB_OBJECT:
duk_debug_skip_byte(thr);
len = duk_debug_read_byte(thr);
duk_debug_skip_bytes(thr, len);
break;
case DUK_DBG_IB_POINTER:
case DUK_DBG_IB_HEAPPTR:
len = duk_debug_read_byte(thr);
duk_debug_skip_bytes(thr, len);
break;
case DUK_DBG_IB_LIGHTFUNC:
duk_debug_skip_bytes(thr, 2);
len = duk_debug_read_byte(thr);
duk_debug_skip_bytes(thr, len);
break;
default:
goto fail;
}
return 0;
fail:
DUK__SET_CONN_BROKEN(thr, 1);
return 1; /* Pretend like we got EOM */
}
/* Skip dvalues to EOM. */
DUK_LOCAL void duk__debug_skip_to_eom(duk_hthread *thr) {
for (;;) {
if (duk__debug_skip_dvalue(thr)) {
break;
}
}
}
/*
* Simple commands
*/
DUK_LOCAL void duk__debug_handle_basic_info(duk_hthread *thr, duk_heap *heap) {
DUK_UNREF(heap);
DUK_D(DUK_DPRINT("debug command Version"));
duk_debug_write_reply(thr);
duk_debug_write_int(thr, DUK_VERSION);
duk_debug_write_cstring(thr, DUK_GIT_DESCRIBE);
duk_debug_write_cstring(thr, DUK_USE_TARGET_INFO);
#if defined(DUK_USE_DOUBLE_LE)
duk_debug_write_int(thr, 1);
#elif defined(DUK_USE_DOUBLE_ME)
duk_debug_write_int(thr, 2);
#elif defined(DUK_USE_DOUBLE_BE)
duk_debug_write_int(thr, 3);
#else
duk_debug_write_int(thr, 0);
#endif
duk_debug_write_int(thr, (duk_int_t) sizeof(void *));
duk_debug_write_eom(thr);
}
DUK_LOCAL void duk__debug_handle_trigger_status(duk_hthread *thr, duk_heap *heap) {
DUK_UNREF(heap);
DUK_D(DUK_DPRINT("debug command TriggerStatus"));
duk_debug_write_reply(thr);
duk_debug_write_eom(thr);
heap->dbg_state_dirty = 1;
}
DUK_LOCAL void duk__debug_handle_pause(duk_hthread *thr, duk_heap *heap) {
DUK_D(DUK_DPRINT("debug command Pause"));
DUK_HEAP_SET_PAUSED(heap);
duk_debug_write_reply(thr);
duk_debug_write_eom(thr);
}
DUK_LOCAL void duk__debug_handle_resume(duk_hthread *thr, duk_heap *heap) {
DUK_D(DUK_DPRINT("debug command Resume"));
DUK_HEAP_CLEAR_PAUSED(heap);
duk_debug_write_reply(thr);
duk_debug_write_eom(thr);
}
DUK_LOCAL void duk__debug_handle_step(duk_hthread *thr, duk_heap *heap, duk_int32_t cmd) {
duk_small_uint_t step_type;
duk_uint_fast32_t line;
DUK_D(DUK_DPRINT("debug command StepInto/StepOver/StepOut: %d", (int) cmd));
if (cmd == DUK_DBG_CMD_STEPINTO) {
step_type = DUK_STEP_TYPE_INTO;
} else if (cmd == DUK_DBG_CMD_STEPOVER) {
step_type = DUK_STEP_TYPE_OVER;
} else {
DUK_ASSERT(cmd == DUK_DBG_CMD_STEPOUT);
step_type = DUK_STEP_TYPE_OUT;
}
line = duk_debug_curr_line(thr);
if (line > 0) {
heap->dbg_paused = 0;
heap->dbg_step_type = step_type;
heap->dbg_step_thread = thr;
heap->dbg_step_csindex = thr->callstack_top - 1;
heap->dbg_step_startline = line;
heap->dbg_state_dirty = 1;
} else {
DUK_D(DUK_DPRINT("cannot determine current line, stepinto/stepover/stepout ignored"));
}
duk_debug_write_reply(thr);
duk_debug_write_eom(thr);
}
DUK_LOCAL void duk__debug_handle_list_break(duk_hthread *thr, duk_heap *heap) {
duk_small_int_t i;
DUK_D(DUK_DPRINT("debug command ListBreak"));
duk_debug_write_reply(thr);
for (i = 0; i < (duk_small_int_t) heap->dbg_breakpoint_count; i++) {
duk_debug_write_hstring(thr, heap->dbg_breakpoints[i].filename);
duk_debug_write_uint(thr, (duk_uint32_t) heap->dbg_breakpoints[i].line);
}
duk_debug_write_eom(thr);
}
DUK_LOCAL void duk__debug_handle_add_break(duk_hthread *thr, duk_heap *heap) {
duk_hstring *filename;
duk_uint32_t linenumber;
duk_small_int_t idx;
DUK_UNREF(heap);
filename = duk_debug_read_hstring(thr);
linenumber = (duk_uint32_t) duk_debug_read_int(thr);
DUK_D(DUK_DPRINT("debug command AddBreak: %!O:%ld", (duk_hobject *) filename, (long) linenumber));
idx = duk_debug_add_breakpoint(thr, filename, linenumber);
if (idx >= 0) {
duk_debug_write_reply(thr);
duk_debug_write_int(thr, (duk_int32_t) idx);
duk_debug_write_eom(thr);
} else {
duk_debug_write_error_eom(thr, DUK_DBG_ERR_TOOMANY, "no space for breakpoint");
}
}
DUK_LOCAL void duk__debug_handle_del_break(duk_hthread *thr, duk_heap *heap) {
duk_small_uint_t idx;
DUK_UNREF(heap);
DUK_D(DUK_DPRINT("debug command DelBreak"));
idx = (duk_small_uint_t) duk_debug_read_int(thr);
if (duk_debug_remove_breakpoint(thr, idx)) {
duk_debug_write_reply(thr);
duk_debug_write_eom(thr);
} else {
duk_debug_write_error_eom(thr, DUK_DBG_ERR_NOTFOUND, "invalid breakpoint index");
}
}
DUK_LOCAL void duk__debug_handle_get_var(duk_hthread *thr, duk_heap *heap) {
duk_context *ctx = (duk_context *) thr;
duk_hstring *str;
duk_bool_t rc;
duk_int32_t level;
DUK_UNREF(heap);
DUK_D(DUK_DPRINT("debug command GetVar"));
str = duk_debug_read_hstring(thr); /* push to stack */
DUK_ASSERT(str != NULL);
if (duk_debug_peek_byte(thr) != DUK_DBG_IB_EOM) {
level = duk_debug_read_int(thr); /* optional callstack level */
if (level >= 0 || -level > (duk_int32_t) thr->callstack_top) {
DUK_D(DUK_DPRINT("invalid callstack level for GetVar"));
duk_debug_write_error_eom(thr, DUK_DBG_ERR_NOTFOUND, "invalid callstack level");
return;
}
} else {
level = -1;
}
if (thr->callstack_top > 0) {
rc = duk_js_getvar_activation(thr,
thr->callstack + thr->callstack_top + level,
str,
0);
} else {
/* No activation, no variable access. Could also pretend
* we're in the global program context and read stuff off
* the global object.
*/
DUK_D(DUK_DPRINT("callstack empty, no activation -> ignore getvar"));
rc = 0;
}
duk_debug_write_reply(thr);
if (rc) {
duk_debug_write_int(thr, 1);
DUK_ASSERT(duk_get_tval(ctx, -2) != NULL);
duk_debug_write_tval(thr, duk_get_tval(ctx, -2));
} else {
duk_debug_write_int(thr, 0);
duk_debug_write_unused(thr);
}
duk_debug_write_eom(thr);
}
DUK_LOCAL void duk__debug_handle_put_var(duk_hthread *thr, duk_heap *heap) {
duk_hstring *str;
duk_tval *tv;
duk_int32_t level;
DUK_UNREF(heap);
DUK_D(DUK_DPRINT("debug command PutVar"));
str = duk_debug_read_hstring(thr); /* push to stack */
DUK_ASSERT(str != NULL);
tv = duk_debug_read_tval(thr);
if (tv == NULL) {
/* detached */
return;
}
if (duk_debug_peek_byte(thr) != DUK_DBG_IB_EOM) {
level = duk_debug_read_int(thr); /* optional callstack level */
if (level >= 0 || -level > (duk_int32_t) thr->callstack_top) {
DUK_D(DUK_DPRINT("invalid callstack level for PutVar"));
duk_debug_write_error_eom(thr, DUK_DBG_ERR_NOTFOUND, "invalid callstack level");
return;
}
} else {
level = -1;
}
if (thr->callstack_top > 0) {
duk_js_putvar_activation(thr,
thr->callstack + thr->callstack_top + level,
str,
tv,
0);
} else {
DUK_D(DUK_DPRINT("callstack empty, no activation -> ignore putvar"));
}
/* XXX: Current putvar implementation doesn't have a success flag,
* add one and send to debug client?
*/
duk_debug_write_reply(thr);
duk_debug_write_eom(thr);
}
DUK_LOCAL void duk__debug_handle_get_call_stack(duk_hthread *thr, duk_heap *heap) {
duk_context *ctx = (duk_context *) thr;
duk_hthread *curr_thr = thr;
duk_activation *curr_act;
duk_uint_fast32_t pc;
duk_uint_fast32_t line;
duk_size_t i;
DUK_ASSERT(thr != NULL);
DUK_UNREF(heap);
duk_debug_write_reply(thr);
while (curr_thr != NULL) {
i = curr_thr->callstack_top;
while (i > 0) {
i--;
curr_act = curr_thr->callstack + i;
/* PC/line semantics here are:
* - For callstack top we're conceptually between two
* opcodes and current PC indicates next line to
* execute, so report that (matches Status).
* - For other activations we're conceptually still
* executing the instruction at PC-1, so report that
* (matches error stacktrace behavior).
* - See: https://github.com/svaarala/duktape/issues/281
*/
/* XXX: optimize to use direct reads, i.e. avoid
* value stack operations.
*/
duk_push_tval(ctx, &curr_act->tv_func);
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_FILE_NAME);
duk__debug_write_hstring_safe_top(thr);
duk_get_prop_stridx(ctx, -2, DUK_STRIDX_NAME);
duk__debug_write_hstring_safe_top(thr);
pc = duk_hthread_get_act_curr_pc(thr, curr_act);
if (i != curr_thr->callstack_top - 1 && pc > 0) {
pc--;
}
line = duk_hobject_pc2line_query(ctx, -3, pc);
duk_debug_write_uint(thr, (duk_uint32_t) line);
duk_debug_write_uint(thr, (duk_uint32_t) pc);
duk_pop_3(ctx);
}
curr_thr = curr_thr->resumer;
}
/* SCANBUILD: warning about 'thr' potentially being NULL here,
* warning is incorrect because thr != NULL always here.
*/
duk_debug_write_eom(thr);
}
DUK_LOCAL void duk__debug_handle_get_locals(duk_hthread *thr, duk_heap *heap) {
duk_context *ctx = (duk_context *) thr;
duk_activation *curr_act;
duk_int32_t level;
duk_hstring *varname;
DUK_UNREF(heap);
if (duk_debug_peek_byte(thr) != DUK_DBG_IB_EOM) {
level = duk_debug_read_int(thr); /* optional callstack level */
if (level >= 0 || -level > (duk_int32_t) thr->callstack_top) {
DUK_D(DUK_DPRINT("invalid callstack level for GetLocals"));
duk_debug_write_error_eom(thr, DUK_DBG_ERR_NOTFOUND, "invalid callstack level");
return;
}
duk_debug_write_reply(thr);
} else {
duk_debug_write_reply(thr);
if (thr->callstack_top == 0) {
goto callstack_empty;
}
level = -1;
}
curr_act = thr->callstack + thr->callstack_top + level;
/* XXX: several nice-to-have improvements here:
* - Use direct reads avoiding value stack operations
* - Avoid triggering getters, indicate getter values to debug client
* - If side effects are possible, add error catching
*/
duk_push_tval(ctx, &curr_act->tv_func);
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_VARMAP);
if (duk_is_object(ctx, -1)) {
duk_enum(ctx, -1, 0 /*enum_flags*/);
while (duk_next(ctx, -1 /*enum_index*/, 0 /*get_value*/)) {
varname = duk_get_hstring(ctx, -1);
DUK_ASSERT(varname != NULL);
duk_js_getvar_activation(thr, curr_act, varname, 0 /*throw_flag*/);
/* [ ... func varmap enum key value this ] */
duk_debug_write_hstring(thr, duk_get_hstring(ctx, -3));
duk_debug_write_tval(thr, duk_get_tval(ctx, -2));
duk_pop_3(ctx); /* -> [ ... func varmap enum ] */
}
} else {
DUK_D(DUK_DPRINT("varmap is not an object in GetLocals, ignore"));
}
callstack_empty:
duk_debug_write_eom(thr);
}
DUK_LOCAL void duk__debug_handle_eval(duk_hthread *thr, duk_heap *heap) {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_t call_flags;
duk_int_t call_ret;
duk_small_int_t eval_err;
duk_int32_t level;
DUK_UNREF(heap);
DUK_D(DUK_DPRINT("debug command Eval"));
/* The eval code is executed within the lexical environment of a specified
* activation. For now, use global object eval() function, with the eval
* considered a 'direct call to eval'.
*
* Callstack level for debug commands only affects scope -- the callstack
* as seen by, e.g. Duktape.act() will be the same regardless.
*/
/* nargs == 2 so we can pass a callstack level to eval(). */
duk_push_c_function(ctx, duk_bi_global_object_eval, 2 /*nargs*/);
duk_push_undefined(ctx); /* 'this' binding shouldn't matter here */
(void) duk_debug_read_hstring(thr);
if (duk_debug_peek_byte(thr) != DUK_DBG_IB_EOM) {
level = duk_debug_read_int(thr); /* optional callstack level */
if (level >= 0 || -level > (duk_int32_t) thr->callstack_top) {
DUK_D(DUK_DPRINT("invalid callstack level for Eval"));
duk_debug_write_error_eom(thr, DUK_DBG_ERR_NOTFOUND, "invalid callstack level");
return;
}
}
else {
level = -1;
}
DUK_ASSERT(level < 0 && -level <= (duk_int32_t) thr->callstack_top);
duk_push_int(ctx, level - 1); /* compensate for eval() call */
/* [ ... eval "eval" eval_input level ] */
call_flags = 0;
if (thr->callstack_top >= (duk_size_t) -level) {
duk_activation *act;
duk_hobject *fun;
act = thr->callstack + thr->callstack_top + level;
fun = DUK_ACT_GET_FUNC(act);
if (fun != NULL && DUK_HOBJECT_IS_COMPILEDFUNCTION(fun)) {
/* Direct eval requires that there's a current
* activation and it is an Ecmascript function.
* When Eval is executed from e.g. cooperate API
* call we'll need to do an indirect eval instead.
*/
call_flags |= DUK_CALL_FLAG_DIRECT_EVAL;
}
}
call_ret = duk_handle_call_protected(thr, 2 /*num_stack_args*/, call_flags);
if (call_ret == DUK_EXEC_SUCCESS) {
eval_err = 0;
/* Use result value as is. */
} else {
/* For errors a string coerced result is most informative
* right now, as the debug client doesn't have the capability
* to traverse the error object.
*/
eval_err = 1;
duk_safe_to_string(ctx, -1);
}
/* [ ... result ] */
duk_debug_write_reply(thr);
duk_debug_write_int(thr, (duk_int32_t) eval_err);
DUK_ASSERT(duk_get_tval(ctx, -1) != NULL);
duk_debug_write_tval(thr, duk_get_tval(ctx, -1));
duk_debug_write_eom(thr);
}
DUK_LOCAL void duk__debug_handle_detach(duk_hthread *thr, duk_heap *heap) {
DUK_UNREF(heap);
DUK_D(DUK_DPRINT("debug command Detach"));
duk_debug_write_reply(thr);
duk_debug_write_eom(thr);
DUK_D(DUK_DPRINT("debug connection detached, mark broken"));
DUK__SET_CONN_BROKEN(thr, 0); /* not an error */
}
DUK_LOCAL void duk__debug_handle_apprequest(duk_hthread *thr, duk_heap *heap) {
duk_context *ctx = (duk_context *) thr;
duk_idx_t old_top;
DUK_D(DUK_DPRINT("debug command AppRequest"));
old_top = duk_get_top(ctx); /* save stack top */
if (heap->dbg_request_cb != NULL) {
duk_idx_t nrets;
duk_idx_t nvalues = 0;
duk_idx_t top, idx;
/* Read tvals from the message and push them onto the valstack,
* then call the request callback to process the request.
*/
while (duk_debug_peek_byte(thr) != DUK_DBG_IB_EOM) {
duk_tval *tv;
if (!duk_check_stack(ctx, 1)) {
DUK_D(DUK_DPRINT("failed to allocate space for request dvalue(s)"));
goto fail;
}
tv = duk_debug_read_tval(thr); /* push to stack */
if (tv == NULL) {
/* detached */
return;
}
nvalues++;
}
DUK_ASSERT(duk_get_top(ctx) == old_top + nvalues);
/* Request callback should push values for reply to client onto valstack */
DUK_D(DUK_DPRINT("calling into AppRequest request_cb with nvalues=%ld, old_top=%ld, top=%ld",
(long) nvalues, (long) old_top, (long) duk_get_top(ctx)));
nrets = heap->dbg_request_cb(ctx, heap->dbg_udata, nvalues);
DUK_D(DUK_DPRINT("returned from AppRequest request_cb; nvalues=%ld -> nrets=%ld, old_top=%ld, top=%ld",
(long) nvalues, (long) nrets, (long) old_top, (long) duk_get_top(ctx)));
if (nrets >= 0) {
DUK_ASSERT(duk_get_top(ctx) >= old_top + nrets);
if (duk_get_top(ctx) < old_top + nrets) {
DUK_D(DUK_DPRINT("AppRequest callback doesn't match value stack configuration, "
"top=%ld < old_top=%ld + nrets=%ld; "
"this might mean it's unsafe to continue!",
(long) duk_get_top(ctx), (long) old_top, (long) nrets));
goto fail;
}
/* Reply with tvals pushed by request callback */
duk_debug_write_byte(thr, DUK_DBG_IB_REPLY);
top = duk_get_top(ctx);
for (idx = top - nrets; idx < top; idx++) {
duk_debug_write_tval(thr, DUK_GET_TVAL_POSIDX(ctx, idx));
}
duk_debug_write_eom(thr);
} else {
DUK_ASSERT(duk_get_top(ctx) >= old_top + 1);
if (duk_get_top(ctx) < old_top + 1) {
DUK_D(DUK_DPRINT("request callback return value doesn't match value stack configuration"));
goto fail;
}
duk_debug_write_error_eom(thr, DUK_DBG_ERR_APPLICATION, duk_get_string(ctx, -1));
}
duk_set_top(ctx, old_top); /* restore stack top */
} else {
DUK_D(DUK_DPRINT("no request callback, treat AppRequest as unsupported"));
duk_debug_write_error_eom(thr, DUK_DBG_ERR_UNSUPPORTED, "AppRequest unsupported by target");
}
return;
fail:
duk_set_top(ctx, old_top); /* restore stack top */
DUK__SET_CONN_BROKEN(thr, 1);
}
/*
* DumpHeap command
*/
#if defined(DUK_USE_DEBUGGER_DUMPHEAP)
/* XXX: this has some overlap with object inspection; remove this and make
* DumpHeap return lists of heapptrs instead?
*/
DUK_LOCAL void duk__debug_dump_heaphdr(duk_hthread *thr, duk_heap *heap, duk_heaphdr *hdr) {
DUK_UNREF(heap);
duk_debug_write_heapptr(thr, hdr);
duk_debug_write_uint(thr, (duk_uint32_t) DUK_HEAPHDR_GET_TYPE(hdr));
duk_debug_write_uint(thr, (duk_uint32_t) DUK_HEAPHDR_GET_FLAGS_RAW(hdr));
#if defined(DUK_USE_REFERENCE_COUNTING)
duk_debug_write_uint(thr, (duk_uint32_t) DUK_HEAPHDR_GET_REFCOUNT(hdr));
#else
duk_debug_write_int(thr, (duk_int32_t) -1);
#endif
switch (DUK_HEAPHDR_GET_TYPE(hdr)) {
case DUK_HTYPE_STRING: {
duk_hstring *h = (duk_hstring *) hdr;
duk_debug_write_uint(thr, (duk_int32_t) DUK_HSTRING_GET_BYTELEN(h));
duk_debug_write_uint(thr, (duk_int32_t) DUK_HSTRING_GET_CHARLEN(h));
duk_debug_write_uint(thr, (duk_int32_t) DUK_HSTRING_GET_HASH(h));
duk_debug_write_hstring(thr, h);
break;
}
case DUK_HTYPE_OBJECT: {
duk_hobject *h = (duk_hobject *) hdr;
duk_hstring *k;
duk_uint_fast32_t i;
duk_debug_write_uint(thr, (duk_uint32_t) DUK_HOBJECT_GET_CLASS_NUMBER(h));
duk_debug_write_heapptr(thr, (duk_heaphdr *) DUK_HOBJECT_GET_PROTOTYPE(heap, h));
duk_debug_write_uint(thr, (duk_uint32_t) DUK_HOBJECT_GET_ESIZE(h));
duk_debug_write_uint(thr, (duk_uint32_t) DUK_HOBJECT_GET_ENEXT(h));
duk_debug_write_uint(thr, (duk_uint32_t) DUK_HOBJECT_GET_ASIZE(h));
duk_debug_write_uint(thr, (duk_uint32_t) DUK_HOBJECT_GET_HSIZE(h));
for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(h); i++) {
duk_debug_write_uint(thr, (duk_uint32_t) DUK_HOBJECT_E_GET_FLAGS(heap, h, i));
k = DUK_HOBJECT_E_GET_KEY(heap, h, i);
duk_debug_write_heapptr(thr, (duk_heaphdr *) k);
if (k == NULL) {
duk_debug_write_int(thr, 0); /* isAccessor */
duk_debug_write_unused(thr);
continue;
}
if (DUK_HOBJECT_E_SLOT_IS_ACCESSOR(heap, h, i)) {
duk_debug_write_int(thr, 1); /* isAccessor */
duk_debug_write_heapptr(thr, (duk_heaphdr *) DUK_HOBJECT_E_GET_VALUE_PTR(heap, h, i)->a.get);
duk_debug_write_heapptr(thr, (duk_heaphdr *) DUK_HOBJECT_E_GET_VALUE_PTR(heap, h, i)->a.set);
} else {
duk_debug_write_int(thr, 0); /* isAccessor */
duk__debug_write_tval_heapptr(thr, &DUK_HOBJECT_E_GET_VALUE_PTR(heap, h, i)->v);
}
}
for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ASIZE(h); i++) {
/* Note: array dump will include elements beyond
* 'length'.
*/
duk__debug_write_tval_heapptr(thr, DUK_HOBJECT_A_GET_VALUE_PTR(heap, h, i));
}
break;
}
case DUK_HTYPE_BUFFER: {
duk_hbuffer *h = (duk_hbuffer *) hdr;
duk_debug_write_uint(thr, (duk_uint32_t) DUK_HBUFFER_GET_SIZE(h));
duk_debug_write_buffer(thr, (const char *) DUK_HBUFFER_GET_DATA_PTR(heap, h), (duk_size_t) DUK_HBUFFER_GET_SIZE(h));
break;
}
default: {
DUK_D(DUK_DPRINT("invalid htype: %d", (int) DUK_HEAPHDR_GET_TYPE(hdr)));
}
}
}
DUK_LOCAL void duk__debug_dump_heap_allocated(duk_hthread *thr, duk_heap *heap) {
duk_heaphdr *hdr;
hdr = heap->heap_allocated;
while (hdr != NULL) {
duk__debug_dump_heaphdr(thr, heap, hdr);
hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr);
}
}
#if defined(DUK_USE_STRTAB_CHAIN)
DUK_LOCAL void duk__debug_dump_strtab_chain(duk_hthread *thr, duk_heap *heap) {
duk_uint_fast32_t i, j;
duk_strtab_entry *e;
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t *lst;
#else
duk_hstring **lst;
#endif
duk_hstring *h;
for (i = 0; i < DUK_STRTAB_CHAIN_SIZE; i++) {
e = heap->strtable + i;
if (e->listlen > 0) {
#if defined(DUK_USE_HEAPPTR16)
lst = (duk_uint16_t *) DUK_USE_HEAPPTR_DEC16(heap->heap_udata, e->u.strlist16);
#else
lst = e->u.strlist;
#endif
DUK_ASSERT(lst != NULL);
for (j = 0; j < e->listlen; j++) {
#if defined(DUK_USE_HEAPPTR16)
h = DUK_USE_HEAPPTR_DEC16(heap->heap_udata, lst[j]);
#else
h = lst[j];
#endif
if (h != NULL) {
duk__debug_dump_heaphdr(thr, heap, (duk_heaphdr *) h);
}
}
} else {
#if defined(DUK_USE_HEAPPTR16)
h = DUK_USE_HEAPPTR_DEC16(heap->heap_udata, e->u.str16);
#else
h = e->u.str;
#endif
if (h != NULL) {
duk__debug_dump_heaphdr(thr, heap, (duk_heaphdr *) h);
}
}
}
}
#endif /* DUK_USE_STRTAB_CHAIN */
#if defined(DUK_USE_STRTAB_PROBE)
DUK_LOCAL void duk__debug_dump_strtab_probe(duk_hthread *thr, duk_heap *heap) {
duk_uint32_t i;
duk_hstring *h;
for (i = 0; i < heap->st_size; i++) {
#if defined(DUK_USE_HEAPPTR16)
h = DUK_USE_HEAPPTR_DEC16(heap->heap_udata, heap->strtable16[i]);
#else
h = heap->strtable[i];
#endif
if (h == NULL || h == DUK_STRTAB_DELETED_MARKER(heap)) {
continue;
}
duk__debug_dump_heaphdr(thr, heap, (duk_heaphdr *) h);
}
}
#endif /* DUK_USE_STRTAB_PROBE */
DUK_LOCAL void duk__debug_handle_dump_heap(duk_hthread *thr, duk_heap *heap) {
DUK_D(DUK_DPRINT("debug command DumpHeap"));
duk_debug_write_reply(thr);
duk__debug_dump_heap_allocated(thr, heap);
#if defined(DUK_USE_STRTAB_CHAIN)
duk__debug_dump_strtab_chain(thr, heap);
#endif
#if defined(DUK_USE_STRTAB_PROBE)
duk__debug_dump_strtab_probe(thr, heap);
#endif
duk_debug_write_eom(thr);
}
#endif /* DUK_USE_DEBUGGER_DUMPHEAP */
DUK_LOCAL void duk__debug_handle_get_bytecode(duk_hthread *thr, duk_heap *heap) {
duk_activation *act;
duk_hcompiledfunction *fun = NULL;
duk_size_t i, n;
duk_tval *tv;
duk_hobject **fn;
duk_int32_t level = -1;
duk_uint8_t ibyte;
DUK_UNREF(heap);
DUK_D(DUK_DPRINT("debug command GetBytecode"));
ibyte = duk_debug_peek_byte(thr);
if (ibyte != DUK_DBG_IB_EOM) {
tv = duk_debug_read_tval(thr);
if (tv == NULL) {
/* detached */
return;
}
if (DUK_TVAL_IS_OBJECT(tv)) {
/* tentative, checked later */
fun = (duk_hcompiledfunction *) DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(fun != NULL);
} else if (DUK_TVAL_IS_NUMBER(tv)) {
level = (duk_int32_t) DUK_TVAL_GET_NUMBER(tv);
} else {
DUK_D(DUK_DPRINT("invalid argument to GetBytecode: %!T", tv));
goto fail_args;
}
}
if (fun == NULL) {
if (level >= 0 || -level > (duk_int32_t) thr->callstack_top) {
DUK_D(DUK_DPRINT("invalid callstack level for GetBytecode"));
goto fail_level;
}
act = thr->callstack + thr->callstack_top + level;
fun = (duk_hcompiledfunction *) DUK_ACT_GET_FUNC(act);
}
if (fun == NULL || !DUK_HOBJECT_IS_COMPILEDFUNCTION((duk_hobject *) fun)) {
DUK_D(DUK_DPRINT("invalid argument to GetBytecode: %!O", fun));
goto fail_args;
}
DUK_ASSERT(fun != NULL && DUK_HOBJECT_IS_COMPILEDFUNCTION((duk_hobject *) fun));
duk_debug_write_reply(thr);
n = DUK_HCOMPILEDFUNCTION_GET_CONSTS_COUNT(heap, fun);
duk_debug_write_int(thr, (duk_int32_t) n);
tv = DUK_HCOMPILEDFUNCTION_GET_CONSTS_BASE(heap, fun);
for (i = 0; i < n; i++) {
duk_debug_write_tval(thr, tv);
tv++;
}
n = DUK_HCOMPILEDFUNCTION_GET_FUNCS_COUNT(heap, fun);
duk_debug_write_int(thr, (duk_int32_t) n);
fn = DUK_HCOMPILEDFUNCTION_GET_FUNCS_BASE(heap, fun);
for (i = 0; i < n; i++) {
duk_debug_write_hobject(thr, *fn);
fn++;
}
duk_debug_write_string(thr,
(const char *) DUK_HCOMPILEDFUNCTION_GET_CODE_BASE(heap, fun),
(duk_size_t) DUK_HCOMPILEDFUNCTION_GET_CODE_SIZE(heap, fun));
duk_debug_write_eom(thr);
return;
fail_args:
duk_debug_write_error_eom(thr, DUK_DBG_ERR_UNKNOWN, "invalid argument");
return;
fail_level:
duk_debug_write_error_eom(thr, DUK_DBG_ERR_NOTFOUND, "invalid callstack level");
return;
}
/*
* Object inspection commands: GetHeapObjInfo, GetObjPropDesc,
* GetObjPropDescRange
*/
#if defined(DUK_USE_DEBUGGER_INSPECT)
#if 0 /* pruned */
DUK_LOCAL const char * const duk__debug_getinfo_heaphdr_keys[] = {
"reachable",
"temproot",
"finalizable",
"finalized",
"readonly"
/* NULL not needed here */
};
DUK_LOCAL duk_uint_t duk__debug_getinfo_heaphdr_masks[] = {
DUK_HEAPHDR_FLAG_REACHABLE,
DUK_HEAPHDR_FLAG_TEMPROOT,
DUK_HEAPHDR_FLAG_FINALIZABLE,
DUK_HEAPHDR_FLAG_FINALIZED,
DUK_HEAPHDR_FLAG_READONLY,
0 /* terminator */
};
#endif
DUK_LOCAL const char * const duk__debug_getinfo_hstring_keys[] = {
#if 0
"arridx",
"internal",
"reserved_word",
"strict_reserved_word",
"eval_or_arguments",
#endif
"extdata"
/* NULL not needed here */
};
DUK_LOCAL duk_uint_t duk__debug_getinfo_hstring_masks[] = {
#if 0
DUK_HSTRING_FLAG_ARRIDX,
DUK_HSTRING_FLAG_INTERNAL,
DUK_HSTRING_FLAG_RESERVED_WORD,
DUK_HSTRING_FLAG_STRICT_RESERVED_WORD,
DUK_HSTRING_FLAG_EVAL_OR_ARGUMENTS,
#endif
DUK_HSTRING_FLAG_EXTDATA,
0 /* terminator */
};
DUK_LOCAL const char * const duk__debug_getinfo_hobject_keys[] = {
"extensible",
"constructable",
"bound",
"compiledfunction",
"nativefunction",
"bufferobject",
"thread",
"array_part",
"strict",
"notail",
"newenv",
"namebinding",
"createargs",
"envrecclosed",
"exotic_array",
"exotic_stringobj",
"exotic_arguments",
"exotic_dukfunc",
"exotic_proxyobj"
/* NULL not needed here */
};
DUK_LOCAL duk_uint_t duk__debug_getinfo_hobject_masks[] = {
DUK_HOBJECT_FLAG_EXTENSIBLE,
DUK_HOBJECT_FLAG_CONSTRUCTABLE,
DUK_HOBJECT_FLAG_BOUND,
DUK_HOBJECT_FLAG_COMPILEDFUNCTION,
DUK_HOBJECT_FLAG_NATIVEFUNCTION,
DUK_HOBJECT_FLAG_BUFFEROBJECT,
DUK_HOBJECT_FLAG_THREAD,
DUK_HOBJECT_FLAG_ARRAY_PART,
DUK_HOBJECT_FLAG_STRICT,
DUK_HOBJECT_FLAG_NOTAIL,
DUK_HOBJECT_FLAG_NEWENV,
DUK_HOBJECT_FLAG_NAMEBINDING,
DUK_HOBJECT_FLAG_CREATEARGS,
DUK_HOBJECT_FLAG_ENVRECCLOSED,
DUK_HOBJECT_FLAG_EXOTIC_ARRAY,
DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ,
DUK_HOBJECT_FLAG_EXOTIC_ARGUMENTS,
DUK_HOBJECT_FLAG_EXOTIC_DUKFUNC,
DUK_HOBJECT_FLAG_EXOTIC_PROXYOBJ,
0 /* terminator */
};
DUK_LOCAL const char * const duk__debug_getinfo_hbuffer_keys[] = {
"dynamic",
"external"
/* NULL not needed here */
};
DUK_LOCAL duk_uint_t duk__debug_getinfo_hbuffer_masks[] = {
DUK_HBUFFER_FLAG_DYNAMIC,
DUK_HBUFFER_FLAG_EXTERNAL,
0 /* terminator */
};
DUK_LOCAL void duk__debug_getinfo_flags_key(duk_hthread *thr, const char *key) {
duk_debug_write_uint(thr, 0);
duk_debug_write_cstring(thr, key);
}
DUK_LOCAL void duk__debug_getinfo_prop_uint(duk_hthread *thr, const char *key, duk_uint_t val) {
duk_debug_write_uint(thr, 0);
duk_debug_write_cstring(thr, key);
duk_debug_write_uint(thr, val);
}
DUK_LOCAL void duk__debug_getinfo_prop_int(duk_hthread *thr, const char *key, duk_int_t val) {
duk_debug_write_uint(thr, 0);
duk_debug_write_cstring(thr, key);
duk_debug_write_int(thr, val);
}
DUK_LOCAL void duk__debug_getinfo_prop_bool(duk_hthread *thr, const char *key, duk_bool_t val) {
duk_debug_write_uint(thr, 0);
duk_debug_write_cstring(thr, key);
duk_debug_write_boolean(thr, val);
}
DUK_LOCAL void duk__debug_getinfo_bitmask(duk_hthread *thr, const char * const * keys, duk_uint_t *masks, duk_uint_t flags) {
const char *key;
duk_uint_t mask;
for (;;) {
mask = *masks++;
if (!mask) {
break;
}
key = *keys++;
DUK_ASSERT(key != NULL);
DUK_DD(DUK_DDPRINT("inspect bitmask: key=%s, mask=0x%08lx, flags=0x%08lx", key, (unsigned long) mask, (unsigned long) flags));
duk__debug_getinfo_prop_bool(thr, key, flags & mask);
}
}
/* Inspect a property using a virtual index into a conceptual property list
* consisting of (1) all array part items from [0,a_size[ (even when above
* .length) and (2) all entry part items from [0,e_next[. Unused slots are
* indicated using dvalue 'unused'.
*/
DUK_LOCAL duk_bool_t duk__debug_getprop_index(duk_hthread *thr, duk_heap *heap, duk_hobject *h_obj, duk_uint_t idx) {
duk_uint_t a_size;
duk_tval *tv;
duk_hstring *h_key;
duk_hobject *h_getset;
duk_uint_t flags;
DUK_UNREF(heap);
a_size = DUK_HOBJECT_GET_ASIZE(h_obj);
if (idx < a_size) {
duk_debug_write_uint(thr, DUK_PROPDESC_FLAGS_WEC);
duk_debug_write_uint(thr, idx);
tv = DUK_HOBJECT_A_GET_VALUE_PTR(heap, h_obj, idx);
duk_debug_write_tval(thr, tv);
return 1;
}
idx -= a_size;
if (idx >= DUK_HOBJECT_GET_ENEXT(h_obj)) {
return 0;
}
h_key = DUK_HOBJECT_E_GET_KEY(heap, h_obj, idx);
if (h_key == NULL) {
duk_debug_write_uint(thr, 0);
duk_debug_write_null(thr);
duk_debug_write_unused(thr);
return 1;
}
flags = DUK_HOBJECT_E_GET_FLAGS(heap, h_obj, idx);
if (DUK_HSTRING_HAS_INTERNAL(h_key)) {
flags |= DUK_DBG_PROPFLAG_INTERNAL;
}
duk_debug_write_uint(thr, flags);
duk_debug_write_hstring(thr, h_key);
if (flags & DUK_PROPDESC_FLAG_ACCESSOR) {
h_getset = DUK_HOBJECT_E_GET_VALUE_GETTER(heap, h_obj, idx);
if (h_getset) {
duk_debug_write_hobject(thr, h_getset);
} else {
duk_debug_write_null(thr);
}
h_getset = DUK_HOBJECT_E_GET_VALUE_SETTER(heap, h_obj, idx);
if (h_getset) {
duk_debug_write_hobject(thr, h_getset);
} else {
duk_debug_write_null(thr);
}
} else {
tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(heap, h_obj, idx);
duk_debug_write_tval(thr, tv);
}
return 1;
}
DUK_LOCAL void duk__debug_handle_get_heap_obj_info(duk_hthread *thr, duk_heap *heap) {
duk_heaphdr *h;
DUK_D(DUK_DPRINT("debug command GetHeapObjInfo"));
DUK_UNREF(heap);
h = duk_debug_read_any_ptr(thr);
if (!h) {
duk_debug_write_error_eom(thr, DUK_DBG_ERR_UNKNOWN, "invalid target");
return;
}
duk_debug_write_reply(thr);
/* As with all inspection code, we rely on the debug client providing
* a valid, non-stale pointer: there's no portable way to safely
* validate the pointer here.
*/
duk__debug_getinfo_flags_key(thr, "heapptr");
duk_debug_write_heapptr(thr, h);
/* XXX: comes out as signed now */
duk__debug_getinfo_prop_uint(thr, "heaphdr_flags", (duk_uint_t) DUK_HEAPHDR_GET_FLAGS(h));
duk__debug_getinfo_prop_uint(thr, "heaphdr_type", (duk_uint_t) DUK_HEAPHDR_GET_TYPE(h));
#if defined(DUK_USE_REFERENCE_COUNTING)
duk__debug_getinfo_prop_uint(thr, "refcount", (duk_uint_t) DUK_HEAPHDR_GET_REFCOUNT(h));
#endif
#if 0 /* pruned */
duk__debug_getinfo_bitmask(thr,
duk__debug_getinfo_heaphdr_keys,
duk__debug_getinfo_heaphdr_masks,
DUK_HEAPHDR_GET_FLAGS_RAW(h));
#endif
switch (DUK_HEAPHDR_GET_TYPE(h)) {
case DUK_HTYPE_STRING: {
duk_hstring *h_str;
h_str = (duk_hstring *) h;
duk__debug_getinfo_bitmask(thr,
duk__debug_getinfo_hstring_keys,
duk__debug_getinfo_hstring_masks,
DUK_HEAPHDR_GET_FLAGS_RAW(h));
duk__debug_getinfo_prop_uint(thr, "bytelen", DUK_HSTRING_GET_BYTELEN(h_str));
duk__debug_getinfo_prop_uint(thr, "charlen", DUK_HSTRING_GET_CHARLEN(h_str));
duk__debug_getinfo_prop_uint(thr, "hash", DUK_HSTRING_GET_HASH(h_str));
duk__debug_getinfo_flags_key(thr, "data");
duk_debug_write_hstring(thr, h_str);
break;
}
case DUK_HTYPE_OBJECT: {
duk_hobject *h_obj;
duk_hobject *h_proto;
h_obj = (duk_hobject *) h;
h_proto = DUK_HOBJECT_GET_PROTOTYPE(heap, h_obj);
/* duk_hobject specific fields. */
duk__debug_getinfo_bitmask(thr,
duk__debug_getinfo_hobject_keys,
duk__debug_getinfo_hobject_masks,
DUK_HEAPHDR_GET_FLAGS_RAW(h));
duk__debug_getinfo_prop_uint(thr, "class_number", DUK_HOBJECT_GET_CLASS_NUMBER(h_obj));
duk__debug_getinfo_flags_key(thr, "class_name");
duk_debug_write_hstring(thr, DUK_HOBJECT_GET_CLASS_STRING(heap, h_obj));
duk__debug_getinfo_flags_key(thr, "prototype");
if (h_proto != NULL) {
duk_debug_write_hobject(thr, h_proto);
} else {
duk_debug_write_null(thr);
}
duk__debug_getinfo_flags_key(thr, "props");
duk_debug_write_pointer(thr, (void *) DUK_HOBJECT_GET_PROPS(heap, h_obj));
duk__debug_getinfo_prop_uint(thr, "e_size", (duk_uint_t) DUK_HOBJECT_GET_ESIZE(h_obj));
duk__debug_getinfo_prop_uint(thr, "e_next", (duk_uint_t) DUK_HOBJECT_GET_ENEXT(h_obj));
duk__debug_getinfo_prop_uint(thr, "a_size", (duk_uint_t) DUK_HOBJECT_GET_ASIZE(h_obj));
duk__debug_getinfo_prop_uint(thr, "h_size", (duk_uint_t) DUK_HOBJECT_GET_HSIZE(h_obj));
/* duk_hnativefunction specific fields. */
if (DUK_HOBJECT_IS_NATIVEFUNCTION(h_obj)) {
duk_hnativefunction *h_fun;
h_fun = (duk_hnativefunction *) h_obj;
duk__debug_getinfo_prop_int(thr, "nargs", h_fun->nargs);
duk__debug_getinfo_prop_int(thr, "magic", h_fun->magic);
duk__debug_getinfo_prop_bool(thr, "varargs", h_fun->magic == DUK_HNATIVEFUNCTION_NARGS_VARARGS);
/* Native function pointer may be different from a void pointer,
* and we serialize it from memory directly now (no byte swapping etc).
*/
duk__debug_getinfo_flags_key(thr, "funcptr");
duk_debug_write_buffer(thr, (const char *) &h_fun->func, sizeof(h_fun->func));
}
if (DUK_HOBJECT_IS_COMPILEDFUNCTION(h_obj)) {
duk_hcompiledfunction *h_fun;
duk_hbuffer *h_buf;
h_fun = (duk_hcompiledfunction *) h_obj;
duk__debug_getinfo_prop_int(thr, "nregs", h_fun->nregs);
duk__debug_getinfo_prop_int(thr, "nargs", h_fun->nargs);
duk__debug_getinfo_prop_uint(thr, "start_line", h_fun->start_line);
duk__debug_getinfo_prop_uint(thr, "end_line", h_fun->end_line);
h_buf = (duk_hbuffer *) DUK_HCOMPILEDFUNCTION_GET_DATA(thr->heap, h_fun);
if (h_buf != NULL) {
duk__debug_getinfo_flags_key(thr, "data");
duk_debug_write_heapptr(thr, (duk_heaphdr *) h_buf);
}
}
if (DUK_HOBJECT_IS_THREAD(h_obj)) {
/* XXX: Currently no inspection of threads, e.g. value stack, call
* stack, catch stack, etc.
*/
duk_hthread *h_thr;
h_thr = (duk_hthread *) h_obj;
DUK_UNREF(h_thr);
}
if (DUK_HOBJECT_IS_BUFFEROBJECT(h_obj)) {
duk_hbufferobject *h_bufobj;
h_bufobj = (duk_hbufferobject *) h_obj;
duk__debug_getinfo_prop_uint(thr, "slice_offset", h_bufobj->offset);
duk__debug_getinfo_prop_uint(thr, "slice_length", h_bufobj->length);
duk__debug_getinfo_prop_uint(thr, "elem_shift", (duk_uint_t) h_bufobj->shift);
duk__debug_getinfo_prop_uint(thr, "elem_type", (duk_uint_t) h_bufobj->elem_type);
duk__debug_getinfo_prop_bool(thr, "is_view", (duk_uint_t) h_bufobj->is_view);
if (h_bufobj->buf != NULL) {
duk__debug_getinfo_flags_key(thr, "buffer");
duk_debug_write_heapptr(thr, (duk_heaphdr *) h_bufobj->buf);
}
}
break;
}
case DUK_HTYPE_BUFFER: {
duk_hbuffer *h_buf;
h_buf = (duk_hbuffer *) h;
duk__debug_getinfo_bitmask(thr,
duk__debug_getinfo_hbuffer_keys,
duk__debug_getinfo_hbuffer_masks,
DUK_HEAPHDR_GET_FLAGS_RAW(h));
duk__debug_getinfo_prop_uint(thr, "size", (duk_uint_t) DUK_HBUFFER_GET_SIZE(h_buf));
duk__debug_getinfo_flags_key(thr, "dataptr");
duk_debug_write_pointer(thr, (void *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_buf));
duk__debug_getinfo_flags_key(thr, "data");
duk_debug_write_hbuffer(thr, h_buf); /* tolerates NULL h_buf */
break;
}
default: {
/* Since we already started writing the reply, just emit nothing. */
DUK_D(DUK_DPRINT("inspect target pointer has invalid heaphdr type"));
}
}
duk_debug_write_eom(thr);
}
DUK_LOCAL void duk__debug_handle_get_obj_prop_desc(duk_hthread *thr, duk_heap *heap) {
duk_heaphdr *h;
duk_hobject *h_obj;
duk_hstring *h_key;
duk_propdesc desc;
DUK_D(DUK_DPRINT("debug command GetObjPropDesc"));
DUK_UNREF(heap);
h = duk_debug_read_any_ptr(thr);
if (!h) {
duk_debug_write_error_eom(thr, DUK_DBG_ERR_UNKNOWN, "invalid target");
return;
}
h_key = duk_debug_read_hstring(thr);
if (h == NULL || DUK_HEAPHDR_GET_TYPE(h) != DUK_HTYPE_OBJECT || h_key == NULL) {
goto fail_args;
}
h_obj = (duk_hobject *) h;
if (duk_hobject_get_own_propdesc(thr, h_obj, h_key, &desc, 0 /*flags*/)) {
duk_int_t virtual_idx;
duk_bool_t rc;
/* To use the shared helper need the virtual index. */
DUK_ASSERT(desc.e_idx >= 0 || desc.a_idx >= 0);
virtual_idx = (desc.a_idx >= 0 ? desc.a_idx :
(duk_int_t) DUK_HOBJECT_GET_ASIZE(h_obj) + desc.e_idx);
duk_debug_write_reply(thr);
rc = duk__debug_getprop_index(thr, heap, h_obj, (duk_uint_t) virtual_idx);
DUK_ASSERT(rc == 1);
DUK_UNREF(rc);
duk_debug_write_eom(thr);
} else {
duk_debug_write_error_eom(thr, DUK_DBG_ERR_NOTFOUND, "not found");
}
return;
fail_args:
duk_debug_write_error_eom(thr, DUK_DBG_ERR_UNKNOWN, "invalid args");
}
DUK_LOCAL void duk__debug_handle_get_obj_prop_desc_range(duk_hthread *thr, duk_heap *heap) {
duk_heaphdr *h;
duk_hobject *h_obj;
duk_uint_t idx, idx_start, idx_end;
DUK_D(DUK_DPRINT("debug command GetObjPropDescRange"));
DUK_UNREF(heap);
h = duk_debug_read_any_ptr(thr);
idx_start = duk_debug_read_int(thr);
idx_end = duk_debug_read_int(thr);
if (h == NULL || DUK_HEAPHDR_GET_TYPE(h) != DUK_HTYPE_OBJECT) {
goto fail_args;
}
h_obj = (duk_hobject *) h;
/* The index range space is conceptually the array part followed by the
* entry part. Unlike normal enumeration all slots are exposed here as
* is and return 'unused' if the slots are not in active use. In particular
* the array part is included for the full a_size regardless of what the
* array .length is.
*/
duk_debug_write_reply(thr);
for (idx = idx_start; idx < idx_end; idx++) {
if (!duk__debug_getprop_index(thr, heap, h_obj, idx)) {
break;
}
}
duk_debug_write_eom(thr);
return;
fail_args:
duk_debug_write_error_eom(thr, DUK_DBG_ERR_UNKNOWN, "invalid args");
}
#endif /* DUK_USE_DEBUGGER_INSPECT */
/*
* Process incoming debug requests
*
* Individual request handlers can push temporaries on the value stack and
* rely on duk__debug_process_message() to restore the value stack top
* automatically.
*/
/* Process one debug message. Automatically restore value stack top to its
* entry value, so that individual message handlers don't need exact value
* stack handling which is convenient.
*/
DUK_LOCAL void duk__debug_process_message(duk_hthread *thr) {
duk_context *ctx = (duk_context *) thr;
duk_heap *heap;
duk_uint8_t x;
duk_int32_t cmd;
duk_idx_t entry_top;
DUK_ASSERT(thr != NULL);
heap = thr->heap;
DUK_ASSERT(heap != NULL);
DUK_UNREF(ctx);
entry_top = duk_get_top(ctx);
x = duk_debug_read_byte(thr);
switch (x) {
case DUK_DBG_IB_REQUEST: {
cmd = duk_debug_read_int(thr);
switch (cmd) {
case DUK_DBG_CMD_BASICINFO: {
duk__debug_handle_basic_info(thr, heap);
break;
}
case DUK_DBG_CMD_TRIGGERSTATUS: {
duk__debug_handle_trigger_status(thr, heap);
break;
}
case DUK_DBG_CMD_PAUSE: {
duk__debug_handle_pause(thr, heap);
break;
}
case DUK_DBG_CMD_RESUME: {
duk__debug_handle_resume(thr, heap);
break;
}
case DUK_DBG_CMD_STEPINTO:
case DUK_DBG_CMD_STEPOVER:
case DUK_DBG_CMD_STEPOUT: {
duk__debug_handle_step(thr, heap, cmd);
break;
}
case DUK_DBG_CMD_LISTBREAK: {
duk__debug_handle_list_break(thr, heap);
break;
}
case DUK_DBG_CMD_ADDBREAK: {
duk__debug_handle_add_break(thr, heap);
break;
}
case DUK_DBG_CMD_DELBREAK: {
duk__debug_handle_del_break(thr, heap);
break;
}
case DUK_DBG_CMD_GETVAR: {
duk__debug_handle_get_var(thr, heap);
break;
}
case DUK_DBG_CMD_PUTVAR: {
duk__debug_handle_put_var(thr, heap);
break;
}
case DUK_DBG_CMD_GETCALLSTACK: {
duk__debug_handle_get_call_stack(thr, heap);
break;
}
case DUK_DBG_CMD_GETLOCALS: {
duk__debug_handle_get_locals(thr, heap);
break;
}
case DUK_DBG_CMD_EVAL: {
duk__debug_handle_eval(thr, heap);
break;
}
case DUK_DBG_CMD_DETACH: {
/* The actual detached_cb call is postponed to message loop so
* we don't need any special precautions here (just skip to EOM
* on the already closed connection).
*/
duk__debug_handle_detach(thr, heap);
break;
}
#if defined(DUK_USE_DEBUGGER_DUMPHEAP)
case DUK_DBG_CMD_DUMPHEAP: {
duk__debug_handle_dump_heap(thr, heap);
break;
}
#endif /* DUK_USE_DEBUGGER_DUMPHEAP */
case DUK_DBG_CMD_GETBYTECODE: {
duk__debug_handle_get_bytecode(thr, heap);
break;
}
case DUK_DBG_CMD_APPREQUEST: {
duk__debug_handle_apprequest(thr, heap);
break;
}
#if defined(DUK_USE_DEBUGGER_INSPECT)
case DUK_DBG_CMD_GETHEAPOBJINFO: {
duk__debug_handle_get_heap_obj_info(thr, heap);
break;
}
case DUK_DBG_CMD_GETOBJPROPDESC: {
duk__debug_handle_get_obj_prop_desc(thr, heap);
break;
}
case DUK_DBG_CMD_GETOBJPROPDESCRANGE: {
duk__debug_handle_get_obj_prop_desc_range(thr, heap);
break;
}
#endif /* DUK_USE_DEBUGGER_INSPECT */
default: {
DUK_D(DUK_DPRINT("debug command unsupported: %d", (int) cmd));
duk_debug_write_error_eom(thr, DUK_DBG_ERR_UNSUPPORTED, "unsupported command");
}
} /* switch cmd */
break;
}
case DUK_DBG_IB_REPLY: {
DUK_D(DUK_DPRINT("debug reply, skipping"));
break;
}
case DUK_DBG_IB_ERROR: {
DUK_D(DUK_DPRINT("debug error, skipping"));
break;
}
case DUK_DBG_IB_NOTIFY: {
DUK_D(DUK_DPRINT("debug notify, skipping"));
break;
}
default: {
DUK_D(DUK_DPRINT("invalid initial byte, drop connection: %d", (int) x));
goto fail;
}
} /* switch initial byte */
DUK_ASSERT(duk_get_top(ctx) >= entry_top);
duk_set_top(ctx, entry_top);
duk__debug_skip_to_eom(thr);
return;
fail:
DUK_ASSERT(duk_get_top(ctx) >= entry_top);
duk_set_top(ctx, entry_top);
DUK__SET_CONN_BROKEN(thr, 1);
return;
}
DUK_LOCAL void duk__check_resend_status(duk_hthread *thr) {
if (thr->heap->dbg_read_cb != NULL && thr->heap->dbg_state_dirty) {
duk_debug_send_status(thr);
thr->heap->dbg_state_dirty = 0;
}
}
DUK_INTERNAL duk_bool_t duk_debug_process_messages(duk_hthread *thr, duk_bool_t no_block) {
duk_context *ctx = (duk_context *) thr;
#if defined(DUK_USE_ASSERTIONS)
duk_idx_t entry_top;
#endif
duk_bool_t retval = 0;
DUK_ASSERT(thr != NULL);
DUK_UNREF(ctx);
DUK_ASSERT(thr->heap != NULL);
#if defined(DUK_USE_ASSERTIONS)
entry_top = duk_get_top(ctx);
#endif
DUK_D(DUK_DPRINT("process debug messages: read_cb=%s, no_block=%ld, detaching=%ld, processing=%ld",
thr->heap->dbg_read_cb ? "not NULL" : "NULL", (long) no_block,
(long) thr->heap->dbg_detaching, (long) thr->heap->dbg_processing));
DUK_DD(DUK_DDPRINT("top at entry: %ld", (long) duk_get_top(ctx)));
/* thr->heap->dbg_detaching may be != 0 if a debugger write outside
* the message loop caused a transport error and detach1() to run.
*/
DUK_ASSERT(thr->heap->dbg_detaching == 0 || thr->heap->dbg_detaching == 1);
DUK_ASSERT(thr->heap->dbg_processing == 0);
thr->heap->dbg_processing = 1;
/* Ensure dirty state causes a Status even if never process any
* messages. This is expected by the bytecode executor when in
* the running state.
*/
duk__check_resend_status(thr);
for (;;) {
/* Process messages until we're no longer paused or we peek
* and see there's nothing to read right now.
*/
DUK_DD(DUK_DDPRINT("top at loop top: %ld", (long) duk_get_top(ctx)));
DUK_ASSERT(thr->heap->dbg_processing == 1);
while (thr->heap->dbg_read_cb == NULL && thr->heap->dbg_detaching) {
/* Detach is pending; can be triggered from outside the
* debugger loop (e.g. Status notify write error) or by
* previous message handling. Call detached callback
* here, in a controlled state, to ensure a possible
* reattach inside the detached_cb is handled correctly.
*
* Recheck for detach in a while loop: an immediate
* reattach involves a call to duk_debugger_attach()
* which writes a debugger handshake line immediately
* inside the API call. If the transport write fails
* for that handshake, we can immediately end up in a
* "transport broken, detaching" case several times here.
* Loop back until we're either cleanly attached or
* fully detached.
*
* NOTE: Reset dbg_processing = 1 forcibly, in case we
* re-attached; duk_debugger_attach() sets dbg_processing
* to 0 at the moment.
*/
DUK_D(DUK_DPRINT("detach pending (dbg_read_cb == NULL, dbg_detaching != 0), call detach2"));
duk__debug_do_detach2(thr->heap);
thr->heap->dbg_processing = 1; /* may be set to 0 by duk_debugger_attach() inside callback */
DUK_D(DUK_DPRINT("after detach2 (and possible reattach): dbg_read_cb=%s, dbg_detaching=%ld",
thr->heap->dbg_read_cb ? "not NULL" : "NULL", (long) thr->heap->dbg_detaching));
}
DUK_ASSERT(thr->heap->dbg_detaching == 0); /* true even with reattach */
DUK_ASSERT(thr->heap->dbg_processing == 1); /* even after a detach and possible reattach */
if (thr->heap->dbg_read_cb == NULL) {
DUK_D(DUK_DPRINT("debug connection broken (and not detaching), stop processing messages"));
break;
}
if (!thr->heap->dbg_paused || no_block) {
if (!duk_debug_read_peek(thr)) {
/* Note: peek cannot currently trigger a detach
* so the dbg_detaching == 0 assert outside the
* loop is correct.
*/
DUK_D(DUK_DPRINT("processing debug message, peek indicated no data, stop processing messages"));
break;
}
DUK_D(DUK_DPRINT("processing debug message, peek indicated there is data, handle it"));
} else {
DUK_D(DUK_DPRINT("paused, process debug message, blocking if necessary"));
}
duk__check_resend_status(thr);
duk__debug_process_message(thr);
duk__check_resend_status(thr);
retval = 1; /* processed one or more messages */
}
DUK_ASSERT(thr->heap->dbg_detaching == 0);
DUK_ASSERT(thr->heap->dbg_processing == 1);
thr->heap->dbg_processing = 0;
/* As an initial implementation, read flush after exiting the message
* loop. If transport is broken, this is a no-op (with debug logs).
*/
duk_debug_read_flush(thr); /* this cannot initiate a detach */
DUK_ASSERT(thr->heap->dbg_detaching == 0);
DUK_DD(DUK_DDPRINT("top at exit: %ld", (long) duk_get_top(ctx)));
#if defined(DUK_USE_ASSERTIONS)
/* Easy to get wrong, so assert for it. */
DUK_ASSERT(entry_top == duk_get_top(ctx));
#endif
return retval;
}
/*
* Halt execution helper
*/
/* Halt execution and enter a debugger message loop until execution is resumed
* by the client. PC for the current activation may be temporarily decremented
* so that the "current" instruction will be shown by the client. This helper
* is callable from anywhere, also outside bytecode executor.
*/
DUK_INTERNAL void duk_debug_halt_execution(duk_hthread *thr, duk_bool_t use_prev_pc) {
duk_activation *act;
duk_hcompiledfunction *fun;
duk_instr_t *old_pc = NULL;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(DUK_HEAP_IS_DEBUGGER_ATTACHED(thr->heap));
DUK_ASSERT(thr->heap->dbg_processing == 0);
DUK_HEAP_SET_PAUSED(thr->heap);
act = duk_hthread_get_current_activation(thr);
/* NOTE: act may be NULL if an error is thrown outside of any activation,
* which may happen in the case of, e.g. syntax errors.
*/
/* Decrement PC if that was requested, this requires a PC sync. */
if (act != NULL) {
duk_hthread_sync_currpc(thr);
old_pc = act->curr_pc;
fun = (duk_hcompiledfunction *) DUK_ACT_GET_FUNC(act);
/* Short circuit if is safe: if act->curr_pc != NULL, 'fun' is
* guaranteed to be a non-NULL Ecmascript function.
*/
DUK_ASSERT(act->curr_pc == NULL ||
(fun != NULL && DUK_HOBJECT_IS_COMPILEDFUNCTION((duk_hobject *) fun)));
if (use_prev_pc &&
act->curr_pc != NULL &&
act->curr_pc > DUK_HCOMPILEDFUNCTION_GET_CODE_BASE(thr->heap, fun)) {
act->curr_pc--;
}
}
/* Process debug messages until we are no longer paused. */
/* NOTE: This is a bit fragile. It's important to ensure that
* duk_debug_process_messages() never throws an error or
* act->curr_pc will never be reset.
*/
thr->heap->dbg_state_dirty = 1;
while (thr->heap->dbg_paused) {
DUK_ASSERT(DUK_HEAP_IS_DEBUGGER_ATTACHED(thr->heap));
DUK_ASSERT(thr->heap->dbg_processing);
duk_debug_process_messages(thr, 0 /*no_block*/);
}
/* XXX: Decrementing and restoring act->curr_pc works now, but if the
* debugger message loop gains the ability to adjust the current PC
* (e.g. a forced jump) restoring the PC here will break. Another
* approach would be to use a state flag for the "decrement 1 from
* topmost activation's PC" and take it into account whenever dealing
* with PC values.
*/
if (act != NULL) {
act->curr_pc = old_pc; /* restore PC */
}
}
/*
* Breakpoint management
*/
DUK_INTERNAL duk_small_int_t duk_debug_add_breakpoint(duk_hthread *thr, duk_hstring *filename, duk_uint32_t line) {
duk_heap *heap;
duk_breakpoint *b;
/* Caller must trigger recomputation of active breakpoint list. To
* ensure stale values are not used if that doesn't happen, clear the
* active breakpoint list here.
*/
DUK_ASSERT(thr != NULL);
DUK_ASSERT(filename != NULL);
heap = thr->heap;
DUK_ASSERT(heap != NULL);
if (heap->dbg_breakpoint_count >= DUK_HEAP_MAX_BREAKPOINTS) {
DUK_D(DUK_DPRINT("failed to add breakpoint for %O:%ld, all breakpoint slots used",
(duk_heaphdr *) filename, (long) line));
return -1;
}
heap->dbg_breakpoints_active[0] = (duk_breakpoint *) NULL;
b = heap->dbg_breakpoints + (heap->dbg_breakpoint_count++);
b->filename = filename;
b->line = line;
DUK_HSTRING_INCREF(thr, filename);
return heap->dbg_breakpoint_count - 1; /* index */
}
DUK_INTERNAL duk_bool_t duk_debug_remove_breakpoint(duk_hthread *thr, duk_small_uint_t breakpoint_index) {
duk_heap *heap;
duk_hstring *h;
duk_breakpoint *b;
duk_size_t move_size;
/* Caller must trigger recomputation of active breakpoint list. To
* ensure stale values are not used if that doesn't happen, clear the
* active breakpoint list here.
*/
DUK_ASSERT(thr != NULL);
heap = thr->heap;
DUK_ASSERT(heap != NULL);
DUK_ASSERT(DUK_HEAP_IS_DEBUGGER_ATTACHED(thr->heap));
DUK_ASSERT_DISABLE(breakpoint_index >= 0); /* unsigned */
if (breakpoint_index >= heap->dbg_breakpoint_count) {
DUK_D(DUK_DPRINT("invalid breakpoint index: %ld", (long) breakpoint_index));
return 0;
}
b = heap->dbg_breakpoints + breakpoint_index;
h = b->filename;
DUK_ASSERT(h != NULL);
move_size = sizeof(duk_breakpoint) * (heap->dbg_breakpoint_count - breakpoint_index - 1);
if (move_size > 0) {
DUK_MEMMOVE((void *) b,
(const void *) (b + 1),
(size_t) move_size);
}
heap->dbg_breakpoint_count--;
heap->dbg_breakpoints_active[0] = (duk_breakpoint *) NULL;
DUK_HSTRING_DECREF(thr, h); /* side effects */
DUK_UNREF(h); /* w/o refcounting */
/* Breakpoint entries above the used area are left as garbage. */
return 1;
}
#undef DUK__SET_CONN_BROKEN
#else /* DUK_USE_DEBUGGER_SUPPORT */
/* No debugger support. */
#endif /* DUK_USE_DEBUGGER_SUPPORT */
#line 1 "duk_error_augment.c"
/*
* Augmenting errors at their creation site and their throw site.
*
* When errors are created, traceback data is added by built-in code
* and a user error handler (if defined) can process or replace the
* error. Similarly, when errors are thrown, a user error handler
* (if defined) can process or replace the error.
*
* Augmentation and other processing at error creation time is nice
* because an error is only created once, but it may be thrown and
* rethrown multiple times. User error handler registered for processing
* an error at its throw site must be careful to handle rethrowing in
* a useful manner.
*
* Error augmentation may throw an internal error (e.g. alloc error).
*
* Ecmascript allows throwing any values, so all values cannot be
* augmented. Currently, the built-in augmentation at error creation
* only augments error values which are Error instances (= have the
* built-in Error.prototype in their prototype chain) and are also
* extensible. User error handlers have no limitations in this respect.
*/
/* include removed: duk_internal.h */
/*
* Helper for calling a user error handler.
*
* 'thr' must be the currently active thread; the error handler is called
* in its context. The valstack of 'thr' must have the error value on
* top, and will be replaced by another error value based on the return
* value of the error handler.
*
* The helper calls duk_handle_call() recursively in protected mode.
* Before that call happens, no longjmps should happen; as a consequence,
* we must assume that the valstack contains enough temporary space for
* arguments and such.
*
* While the error handler runs, any errors thrown will not trigger a
* recursive error handler call (this is implemented using a heap level
* flag which will "follow" through any coroutines resumed inside the
* error handler). If the error handler is not callable or throws an
* error, the resulting error replaces the original error (for Duktape
* internal errors, duk_error_throw.c further substitutes this error with
* a DoubleError which is not ideal). This would be easy to change and
* even signal to the caller.
*
* The user error handler is stored in 'Duktape.errCreate' or
* 'Duktape.errThrow' depending on whether we're augmenting the error at
* creation or throw time. There are several alternatives to this approach,
* see doc/error-objects.rst for discussion.
*
* Note: since further longjmp()s may occur while calling the error handler
* (for many reasons, e.g. a labeled 'break' inside the handler), the
* caller can make no assumptions on the thr->heap->lj state after the
* call (this affects especially duk_error_throw.c). This is not an issue
* as long as the caller writes to the lj state only after the error handler
* finishes.
*/
#if defined(DUK_USE_ERRTHROW) || defined(DUK_USE_ERRCREATE)
DUK_LOCAL void duk__err_augment_user(duk_hthread *thr, duk_small_uint_t stridx_cb) {
duk_context *ctx = (duk_context *) thr;
duk_tval *tv_hnd;
duk_small_uint_t call_flags;
duk_int_t rc;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT_DISABLE(stridx_cb >= 0); /* unsigned */
DUK_ASSERT(stridx_cb < DUK_HEAP_NUM_STRINGS);
if (DUK_HEAP_HAS_ERRHANDLER_RUNNING(thr->heap)) {
DUK_DD(DUK_DDPRINT("recursive call to error handler, ignore"));
return;
}
/*
* Check whether or not we have an error handler.
*
* We must be careful of not triggering an error when looking up the
* property. For instance, if the property is a getter, we don't want
* to call it, only plain values are allowed. The value, if it exists,
* is not checked. If the value is not a function, a TypeError happens
* when it is called and that error replaces the original one.
*/
DUK_ASSERT_VALSTACK_SPACE(thr, 4); /* 3 entries actually needed below */
/* [ ... errval ] */
if (thr->builtins[DUK_BIDX_DUKTAPE] == NULL) {
/* When creating built-ins, some of the built-ins may not be set
* and we want to tolerate that when throwing errors.
*/
DUK_DD(DUK_DDPRINT("error occurred when DUK_BIDX_DUKTAPE is NULL, ignoring"));
return;
}
tv_hnd = duk_hobject_find_existing_entry_tval_ptr(thr->heap,
thr->builtins[DUK_BIDX_DUKTAPE],
DUK_HTHREAD_GET_STRING(thr, stridx_cb));
if (tv_hnd == NULL) {
DUK_DD(DUK_DDPRINT("error handler does not exist or is not a plain value: %!T",
(duk_tval *) tv_hnd));
return;
}
DUK_DDD(DUK_DDDPRINT("error handler dump (callability not checked): %!T",
(duk_tval *) tv_hnd));
duk_push_tval(ctx, tv_hnd);
/* [ ... errval errhandler ] */
duk_insert(ctx, -2); /* -> [ ... errhandler errval ] */
duk_push_undefined(ctx);
duk_insert(ctx, -2); /* -> [ ... errhandler undefined(= this) errval ] */
/* [ ... errhandler undefined errval ] */
/*
* DUK_CALL_FLAG_IGNORE_RECLIMIT causes duk_handle_call() to ignore C
* recursion depth limit (and won't increase it either). This is
* dangerous, but useful because it allows the error handler to run
* even if the original error is caused by C recursion depth limit.
*
* The heap level DUK_HEAP_FLAG_ERRHANDLER_RUNNING is set for the
* duration of the error handler and cleared afterwards. This flag
* prevents the error handler from running recursively. The flag is
* heap level so that the flag properly controls even coroutines
* launched by an error handler. Since the flag is heap level, it is
* critical to restore it correctly.
*
* We ignore errors now: a success return and an error value both
* replace the original error value. (This would be easy to change.)
*/
DUK_ASSERT(!DUK_HEAP_HAS_ERRHANDLER_RUNNING(thr->heap)); /* since no recursive error handler calls */
DUK_HEAP_SET_ERRHANDLER_RUNNING(thr->heap);
call_flags = DUK_CALL_FLAG_IGNORE_RECLIMIT; /* ignore reclimit, not constructor */
rc = duk_handle_call_protected(thr,
1, /* num args */
call_flags); /* call_flags */
DUK_UNREF(rc); /* no need to check now: both success and error are OK */
DUK_ASSERT(DUK_HEAP_HAS_ERRHANDLER_RUNNING(thr->heap));
DUK_HEAP_CLEAR_ERRHANDLER_RUNNING(thr->heap);
/* [ ... errval ] */
}
#endif /* DUK_USE_ERRTHROW || DUK_USE_ERRCREATE */
/*
* Add ._Tracedata to an error on the stack top.
*/
#if defined(DUK_USE_TRACEBACKS)
DUK_LOCAL void duk__add_traceback(duk_hthread *thr, duk_hthread *thr_callstack, const char *c_filename, duk_int_t c_line, duk_bool_t noblame_fileline) {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_t depth;
duk_int_t i, i_min;
duk_uarridx_t arr_idx;
duk_double_t d;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr_callstack != NULL);
DUK_ASSERT(ctx != NULL);
/* [ ... error ] */
/*
* The traceback format is pretty arcane in an attempt to keep it compact
* and cheap to create. It may change arbitrarily from version to version.
* It should be decoded/accessed through version specific accessors only.
*
* See doc/error-objects.rst.
*/
DUK_DDD(DUK_DDDPRINT("adding traceback to object: %!T",
(duk_tval *) duk_get_tval(ctx, -1)));
duk_push_array(ctx); /* XXX: specify array size, as we know it */
arr_idx = 0;
/* Compiler SyntaxErrors (and other errors) come first, and are
* blamed by default (not flagged "noblame").
*/
if (thr->compile_ctx != NULL && thr->compile_ctx->h_filename != NULL) {
duk_push_hstring(ctx, thr->compile_ctx->h_filename);
duk_xdef_prop_index_wec(ctx, -2, arr_idx);
arr_idx++;
duk_push_uint(ctx, (duk_uint_t) thr->compile_ctx->curr_token.start_line); /* (flags<<32) + (line), flags = 0 */
duk_xdef_prop_index_wec(ctx, -2, arr_idx);
arr_idx++;
}
/* Filename/line from C macros (__FILE__, __LINE__) are added as an
* entry with a special format: (string, number). The number contains
* the line and flags.
*/
/* XXX: optimize: allocate an array part to the necessary size (upwards
* estimate) and fill in the values directly into the array part; finally
* update 'length'.
*/
/* XXX: using duk_put_prop_index() would cause obscure error cases when Array.prototype
* has write-protected array index named properties. This was seen as DoubleErrors
* in e.g. some test262 test cases. Using duk_xdef_prop_index() is better but heavier.
* The best fix is to fill in the tracedata directly into the array part. There are
* no side effect concerns if the array part is allocated directly and only INCREFs
* happen after that.
*/
/* [ ... error arr ] */
if (c_filename) {
duk_push_string(ctx, c_filename);
duk_xdef_prop_index_wec(ctx, -2, arr_idx);
arr_idx++;
d = (noblame_fileline ? ((duk_double_t) DUK_TB_FLAG_NOBLAME_FILELINE) * DUK_DOUBLE_2TO32 : 0.0) +
(duk_double_t) c_line;
duk_push_number(ctx, d);
duk_xdef_prop_index_wec(ctx, -2, arr_idx);
arr_idx++;
}
/* traceback depth doesn't take into account the filename/line
* special handling above (intentional)
*/
depth = DUK_USE_TRACEBACK_DEPTH;
i_min = (thr_callstack->callstack_top > (duk_size_t) depth ? (duk_int_t) (thr_callstack->callstack_top - depth) : 0);
DUK_ASSERT(i_min >= 0);
/* [ ... error arr ] */
DUK_ASSERT(thr_callstack->callstack_top <= DUK_INT_MAX); /* callstack limits */
for (i = (duk_int_t) (thr_callstack->callstack_top - 1); i >= i_min; i--) {
duk_uint32_t pc;
/*
* Note: each API operation potentially resizes the callstack,
* so be careful to re-lookup after every operation. Currently
* these is no issue because we don't store a temporary 'act'
* pointer at all. (This would be a non-issue if we operated
* directly on the array part.)
*/
/* [... arr] */
DUK_ASSERT_DISABLE(thr_callstack->callstack[i].pc >= 0); /* unsigned */
/* Add function object. */
duk_push_tval(ctx, &(thr_callstack->callstack + i)->tv_func);
duk_xdef_prop_index_wec(ctx, -2, arr_idx);
arr_idx++;
/* Add a number containing: pc, activation flags.
*
* PC points to next instruction, find offending PC. Note that
* PC == 0 for native code.
*/
pc = duk_hthread_get_act_prev_pc(thr_callstack, thr_callstack->callstack + i);
DUK_ASSERT_DISABLE(pc >= 0); /* unsigned */
DUK_ASSERT((duk_double_t) pc < DUK_DOUBLE_2TO32); /* assume PC is at most 32 bits and non-negative */
d = ((duk_double_t) thr_callstack->callstack[i].flags) * DUK_DOUBLE_2TO32 + (duk_double_t) pc;
duk_push_number(ctx, d); /* -> [... arr num] */
duk_xdef_prop_index_wec(ctx, -2, arr_idx);
arr_idx++;
}
/* XXX: set with duk_hobject_set_length() when tracedata is filled directly */
duk_push_uint(ctx, (duk_uint_t) arr_idx);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_WC);
/* [ ... error arr ] */
duk_xdef_prop_stridx_wec(ctx, -2, DUK_STRIDX_INT_TRACEDATA); /* -> [ ... error ] */
}
#endif /* DUK_USE_TRACEBACKS */
/*
* Add .fileName and .lineNumber to an error on the stack top.
*/
#if !defined(DUK_USE_TRACEBACKS)
DUK_LOCAL void duk__add_fileline(duk_hthread *thr, duk_hthread *thr_callstack, const char *c_filename, duk_int_t c_line, duk_bool_t noblame_fileline) {
duk_context *ctx;
#if defined(DUK_USE_ASSERTIONS)
duk_int_t entry_top;
#endif
ctx = (duk_context *) thr;
#if defined(DUK_USE_ASSERTIONS)
entry_top = duk_get_top(ctx);
#endif
/*
* If tracebacks are disabled, 'fileName' and 'lineNumber' are added
* as plain own properties. Since Error.prototype has accessors of
* the same name, we need to define own properties directly (cannot
* just use e.g. duk_put_prop_stridx). Existing properties are not
* overwritten in case they already exist.
*/
if (thr->compile_ctx != NULL && thr->compile_ctx->h_filename != NULL) {
/* Compiler SyntaxError (or other error) gets the primary blame.
* Currently no flag to prevent blaming.
*/
duk_push_uint(ctx, (duk_uint_t) thr->compile_ctx->curr_token.start_line);
duk_push_hstring(ctx, thr->compile_ctx->h_filename);
} else if (c_filename && !noblame_fileline) {
/* C call site gets blamed next, unless flagged not to do so.
* XXX: file/line is disabled in minimal builds, so disable this
* too when appropriate.
*/
duk_push_int(ctx, c_line);
duk_push_string(ctx, c_filename);
} else {
/* Finally, blame the innermost callstack entry which has a
* .fileName property.
*/
duk_small_uint_t depth;
duk_int_t i, i_min;
duk_uint32_t ecma_line;
depth = DUK_USE_TRACEBACK_DEPTH;
i_min = (thr_callstack->callstack_top > (duk_size_t) depth ? (duk_int_t) (thr_callstack->callstack_top - depth) : 0);
DUK_ASSERT(i_min >= 0);
DUK_ASSERT(thr_callstack->callstack_top <= DUK_INT_MAX); /* callstack limits */
for (i = (duk_int_t) (thr_callstack->callstack_top - 1); i >= i_min; i--) {
duk_activation *act;
duk_hobject *func;
duk_uint32_t pc;
DUK_UNREF(pc);
act = thr_callstack->callstack + i;
DUK_ASSERT(act >= thr_callstack->callstack && act < thr_callstack->callstack + thr_callstack->callstack_size);
func = DUK_ACT_GET_FUNC(act);
if (func == NULL) {
/* Lightfunc, not blamed now. */
continue;
}
/* PC points to next instruction, find offending PC,
* PC == 0 for native code.
*/
pc = duk_hthread_get_act_prev_pc(thr, act); /* thr argument only used for thr->heap, so specific thread doesn't matter */
DUK_ASSERT_DISABLE(pc >= 0); /* unsigned */
DUK_ASSERT((duk_double_t) pc < DUK_DOUBLE_2TO32); /* assume PC is at most 32 bits and non-negative */
act = NULL; /* invalidated by pushes, so get out of the way */
duk_push_hobject(ctx, func);
/* [ ... error func ] */
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_FILE_NAME);
if (!duk_is_string(ctx, -1)) {
duk_pop_2(ctx);
continue;
}
/* [ ... error func fileName ] */
ecma_line = 0;
#if defined(DUK_USE_PC2LINE)
if (DUK_HOBJECT_IS_COMPILEDFUNCTION(func)) {
ecma_line = duk_hobject_pc2line_query(ctx, -2, (duk_uint_fast32_t) pc);
} else {
/* Native function, no relevant lineNumber. */
}
#endif /* DUK_USE_PC2LINE */
duk_push_u32(ctx, ecma_line);
/* [ ... error func fileName lineNumber ] */
duk_replace(ctx, -3);
/* [ ... error lineNumber fileName ] */
goto define_props;
}
/* No activation matches, use undefined for both .fileName and
* .lineNumber (matches what we do with a _Tracedata based
* no-match lookup.
*/
duk_push_undefined(ctx);
duk_push_undefined(ctx);
}
define_props:
/* [ ... error lineNumber fileName ] */
#if defined(DUK_USE_ASSERTIONS)
DUK_ASSERT(duk_get_top(ctx) == entry_top + 2);
#endif
duk_xdef_prop_stridx(ctx, -3, DUK_STRIDX_FILE_NAME, DUK_PROPDESC_FLAGS_WC | DUK_PROPDESC_FLAG_NO_OVERWRITE);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_LINE_NUMBER, DUK_PROPDESC_FLAGS_WC | DUK_PROPDESC_FLAG_NO_OVERWRITE);
}
#endif /* !DUK_USE_TRACEBACKS */
/*
* Add line number to a compiler error.
*/
DUK_LOCAL void duk__add_compiler_error_line(duk_hthread *thr) {
duk_context *ctx;
/* Append a "(line NNN)" to the "message" property of any error
* thrown during compilation. Usually compilation errors are
* SyntaxErrors but they can also be out-of-memory errors and
* the like.
*/
/* [ ... error ] */
ctx = (duk_context *) thr;
DUK_ASSERT(duk_is_object(ctx, -1));
if (!(thr->compile_ctx != NULL && thr->compile_ctx->h_filename != NULL)) {
return;
}
DUK_DDD(DUK_DDDPRINT("compile error, before adding line info: %!T",
(duk_tval *) duk_get_tval(ctx, -1)));
if (duk_get_prop_stridx(ctx, -1, DUK_STRIDX_MESSAGE)) {
duk_push_sprintf(ctx, " (line %ld)", (long) thr->compile_ctx->curr_token.start_line);
duk_concat(ctx, 2);
duk_put_prop_stridx(ctx, -2, DUK_STRIDX_MESSAGE);
} else {
duk_pop(ctx);
}
DUK_DDD(DUK_DDDPRINT("compile error, after adding line info: %!T",
(duk_tval *) duk_get_tval(ctx, -1)));
}
/*
* Augment an error being created using Duktape specific properties
* like _Tracedata or .fileName/.lineNumber.
*/
#if defined(DUK_USE_AUGMENT_ERROR_CREATE)
DUK_LOCAL void duk__err_augment_builtin_create(duk_hthread *thr, duk_hthread *thr_callstack, const char *c_filename, duk_int_t c_line, duk_small_int_t noblame_fileline, duk_hobject *obj) {
duk_context *ctx = (duk_context *) thr;
#if defined(DUK_USE_ASSERTIONS)
duk_int_t entry_top;
#endif
#if defined(DUK_USE_ASSERTIONS)
entry_top = duk_get_top(ctx);
#endif
DUK_ASSERT(obj != NULL);
DUK_UNREF(obj); /* unreferenced w/o tracebacks */
DUK_UNREF(ctx); /* unreferenced w/o asserts */
duk__add_compiler_error_line(thr);
#if defined(DUK_USE_TRACEBACKS)
/* If tracebacks are enabled, the '_Tracedata' property is the only
* thing we need: 'fileName' and 'lineNumber' are virtual properties
* which use '_Tracedata'.
*/
if (duk_hobject_hasprop_raw(thr, obj, DUK_HTHREAD_STRING_INT_TRACEDATA(thr))) {
DUK_DDD(DUK_DDDPRINT("error value already has a '_Tracedata' property, not modifying it"));
} else {
duk__add_traceback(thr, thr_callstack, c_filename, c_line, noblame_fileline);
}
#else
/* Without tracebacks the concrete .fileName and .lineNumber need
* to be added directly.
*/
duk__add_fileline(thr, thr_callstack, c_filename, c_line, noblame_fileline);
#endif
#if defined(DUK_USE_ASSERTIONS)
DUK_ASSERT(duk_get_top(ctx) == entry_top);
#endif
}
#endif /* DUK_USE_AUGMENT_ERROR_CREATE */
/*
* Augment an error at creation time with _Tracedata/fileName/lineNumber
* and allow a user error handler (if defined) to process/replace the error.
* The error to be augmented is at the stack top.
*
* thr: thread containing the error value
* thr_callstack: thread which should be used for generating callstack etc.
* c_filename: C __FILE__ related to the error
* c_line: C __LINE__ related to the error
* noblame_fileline: if true, don't fileName/line as error source, otherwise use traceback
* (needed because user code filename/line are reported but internal ones
* are not)
*
* XXX: rename noblame_fileline to flags field; combine it to some existing
* field (there are only a few call sites so this may not be worth it).
*/
#if defined(DUK_USE_AUGMENT_ERROR_CREATE)
DUK_INTERNAL void duk_err_augment_error_create(duk_hthread *thr, duk_hthread *thr_callstack, const char *c_filename, duk_int_t c_line, duk_bool_t noblame_fileline) {
duk_context *ctx = (duk_context *) thr;
duk_hobject *obj;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr_callstack != NULL);
DUK_ASSERT(ctx != NULL);
/* [ ... error ] */
/*
* Criteria for augmenting:
*
* - augmentation enabled in build (naturally)
* - error value internal prototype chain contains the built-in
* Error prototype object (i.e. 'val instanceof Error')
*
* Additional criteria for built-in augmenting:
*
* - error value is an extensible object
*/
obj = duk_get_hobject(ctx, -1);
if (!obj) {
DUK_DDD(DUK_DDDPRINT("value is not an object, skip both built-in and user augment"));
return;
}
if (!duk_hobject_prototype_chain_contains(thr, obj, thr->builtins[DUK_BIDX_ERROR_PROTOTYPE], 1 /*ignore_loop*/)) {
/* If the value has a prototype loop, it's critical not to
* throw here. Instead, assume the value is not to be
* augmented.
*/
DUK_DDD(DUK_DDDPRINT("value is not an error instance, skip both built-in and user augment"));
return;
}
if (DUK_HOBJECT_HAS_EXTENSIBLE(obj)) {
DUK_DDD(DUK_DDDPRINT("error meets criteria, built-in augment"));
duk__err_augment_builtin_create(thr, thr_callstack, c_filename, c_line, noblame_fileline, obj);
} else {
DUK_DDD(DUK_DDDPRINT("error does not meet criteria, no built-in augment"));
}
/* [ ... error ] */
#if defined(DUK_USE_ERRCREATE)
duk__err_augment_user(thr, DUK_STRIDX_ERR_CREATE);
#endif
}
#endif /* DUK_USE_AUGMENT_ERROR_CREATE */
/*
* Augment an error at throw time; allow a user error handler (if defined)
* to process/replace the error. The error to be augmented is at the
* stack top.
*/
#if defined(DUK_USE_AUGMENT_ERROR_THROW)
DUK_INTERNAL void duk_err_augment_error_throw(duk_hthread *thr) {
#if defined(DUK_USE_ERRTHROW)
duk__err_augment_user(thr, DUK_STRIDX_ERR_THROW);
#endif /* DUK_USE_ERRTHROW */
}
#endif /* DUK_USE_AUGMENT_ERROR_THROW */
#line 1 "duk_error_longjmp.c"
/*
* Do a longjmp call, calling the fatal error handler if no
* catchpoint exists.
*/
/* include removed: duk_internal.h */
DUK_INTERNAL void duk_err_longjmp(duk_hthread *thr) {
DUK_ASSERT(thr != NULL);
DUK_DD(DUK_DDPRINT("longjmp error: type=%d iserror=%d value1=%!T value2=%!T",
(int) thr->heap->lj.type, (int) thr->heap->lj.iserror,
&thr->heap->lj.value1, &thr->heap->lj.value2));
#if !defined(DUK_USE_CPP_EXCEPTIONS)
/* If we don't have a jmpbuf_ptr, there is little we can do
* except panic. The caller's expectation is that we never
* return.
*
* With C++ exceptions we now just propagate an uncaught error
* instead of invoking the fatal error handler. Because there's
* a dummy jmpbuf for C++ exceptions now, this could be changed.
*/
if (!thr->heap->lj.jmpbuf_ptr) {
DUK_D(DUK_DPRINT("uncaught error: type=%d iserror=%d value1=%!T value2=%!T",
(int) thr->heap->lj.type, (int) thr->heap->lj.iserror,
&thr->heap->lj.value1, &thr->heap->lj.value2));
duk_fatal((duk_context *) thr, DUK_ERR_UNCAUGHT_ERROR, "uncaught error");
DUK_UNREACHABLE();
}
#endif /* DUK_USE_CPP_EXCEPTIONS */
#if defined(DUK_USE_CPP_EXCEPTIONS)
{
duk_internal_exception exc; /* dummy */
throw exc;
}
#else /* DUK_USE_CPP_EXCEPTIONS */
DUK_LONGJMP(thr->heap->lj.jmpbuf_ptr->jb);
#endif /* DUK_USE_CPP_EXCEPTIONS */
DUK_UNREACHABLE();
}
#line 1 "duk_error_misc.c"
/*
* Error helpers
*/
/* include removed: duk_internal.h */
/*
* Helper to walk the thread chain and see if there is an active error
* catcher. Protected calls or finally blocks aren't considered catching.
*/
#if defined(DUK_USE_DEBUGGER_SUPPORT) && \
(defined(DUK_USE_DEBUGGER_THROW_NOTIFY) || defined(DUK_USE_DEBUGGER_PAUSE_UNCAUGHT))
DUK_LOCAL duk_bool_t duk__have_active_catcher(duk_hthread *thr) {
/*
* XXX: As noted above, a protected API call won't be counted as a
* catcher. This is usually convenient, e.g. in the case of a top-
* level duk_pcall(), but may not always be desirable. Perhaps add an
* argument to treat them as catchers?
*/
duk_size_t i;
DUK_ASSERT(thr != NULL);
while (thr != NULL) {
for (i = 0; i < thr->catchstack_top; i++) {
duk_catcher *cat = thr->catchstack + i;
if (DUK_CAT_HAS_CATCH_ENABLED(cat)) {
return 1; /* all we need to know */
}
}
thr = thr->resumer;
}
return 0;
}
#endif /* DUK_USE_DEBUGGER_SUPPORT && (DUK_USE_DEBUGGER_THROW_NOTIFY || DUK_USE_DEBUGGER_PAUSE_UNCAUGHT) */
/*
* Get prototype object for an integer error code.
*/
DUK_INTERNAL duk_hobject *duk_error_prototype_from_code(duk_hthread *thr, duk_errcode_t code) {
switch (code) {
case DUK_ERR_EVAL_ERROR:
return thr->builtins[DUK_BIDX_EVAL_ERROR_PROTOTYPE];
case DUK_ERR_RANGE_ERROR:
return thr->builtins[DUK_BIDX_RANGE_ERROR_PROTOTYPE];
case DUK_ERR_REFERENCE_ERROR:
return thr->builtins[DUK_BIDX_REFERENCE_ERROR_PROTOTYPE];
case DUK_ERR_SYNTAX_ERROR:
return thr->builtins[DUK_BIDX_SYNTAX_ERROR_PROTOTYPE];
case DUK_ERR_TYPE_ERROR:
return thr->builtins[DUK_BIDX_TYPE_ERROR_PROTOTYPE];
case DUK_ERR_URI_ERROR:
return thr->builtins[DUK_BIDX_URI_ERROR_PROTOTYPE];
/* XXX: more specific error classes? */
case DUK_ERR_UNIMPLEMENTED_ERROR:
case DUK_ERR_INTERNAL_ERROR:
case DUK_ERR_ALLOC_ERROR:
case DUK_ERR_ASSERTION_ERROR:
case DUK_ERR_API_ERROR:
case DUK_ERR_ERROR:
default:
return thr->builtins[DUK_BIDX_ERROR_PROTOTYPE];
}
}
/*
* Exposed helper for setting up heap longjmp state.
*/
DUK_INTERNAL void duk_err_setup_heap_ljstate(duk_hthread *thr, duk_small_int_t lj_type) {
#if defined(DUK_USE_DEBUGGER_SUPPORT)
/* If something is thrown with the debugger attached and nobody will
* catch it, execution is paused before the longjmp, turning over
* control to the debug client. This allows local state to be examined
* before the stack is unwound. Errors are not intercepted when debug
* message loop is active (e.g. for Eval).
*/
/* XXX: Allow customizing the pause and notify behavior at runtime
* using debugger runtime flags. For now the behavior is fixed using
* config options.
*/
#if defined(DUK_USE_DEBUGGER_THROW_NOTIFY) || defined(DUK_USE_DEBUGGER_PAUSE_UNCAUGHT)
if (DUK_HEAP_IS_DEBUGGER_ATTACHED(thr->heap) &&
!thr->heap->dbg_processing &&
lj_type == DUK_LJ_TYPE_THROW) {
duk_context *ctx = (duk_context *) thr;
duk_bool_t fatal;
duk_hobject *h_obj;
/* Don't intercept a DoubleError, we may have caused the initial double
* fault and attempting to intercept it will cause us to be called
* recursively and exhaust the C stack.
*/
h_obj = duk_get_hobject(ctx, -1);
if (h_obj == thr->builtins[DUK_BIDX_DOUBLE_ERROR]) {
DUK_D(DUK_DPRINT("built-in DoubleError instance thrown, not intercepting"));
goto skip_throw_intercept;
}
DUK_D(DUK_DPRINT("throw with debugger attached, report to client"));
fatal = !duk__have_active_catcher(thr);
#if defined(DUK_USE_DEBUGGER_THROW_NOTIFY)
/* Report it to the debug client */
duk_debug_send_throw(thr, fatal);
#endif
#if defined(DUK_USE_DEBUGGER_PAUSE_UNCAUGHT)
if (fatal) {
DUK_D(DUK_DPRINT("throw will be fatal, halt before longjmp"));
duk_debug_halt_execution(thr, 1 /*use_prev_pc*/);
}
#endif
}
skip_throw_intercept:
#endif /* DUK_USE_DEBUGGER_THROW_NOTIFY || DUK_USE_DEBUGGER_PAUSE_UNCAUGHT */
#endif /* DUK_USE_DEBUGGER_SUPPORT */
thr->heap->lj.type = lj_type;
DUK_ASSERT(thr->valstack_top > thr->valstack);
DUK_TVAL_SET_TVAL_UPDREF(thr, &thr->heap->lj.value1, thr->valstack_top - 1); /* side effects */
duk_pop((duk_context *) thr);
}
#line 1 "duk_error_throw.c"
/*
* Create and throw an Ecmascript error object based on a code and a message.
*
* Used when we throw errors internally. Ecmascript generated error objects
* are created by Ecmascript code, and the throwing is handled by the bytecode
* executor.
*/
/* include removed: duk_internal.h */
/*
* Create and throw an error (originating from Duktape internally)
*
* Push an error object on top of the stack, possibly throw augmenting
* the error, and finally longjmp.
*
* If an error occurs while we're dealing with the current error, we might
* enter an infinite recursion loop. This is prevented by detecting a
* "double fault" through the heap->handling_error flag; the recursion
* then stops at the second level.
*/
#ifdef DUK_USE_VERBOSE_ERRORS
DUK_INTERNAL void duk_err_create_and_throw(duk_hthread *thr, duk_errcode_t code, const char *msg, const char *filename, duk_int_t line) {
#else
DUK_INTERNAL void duk_err_create_and_throw(duk_hthread *thr, duk_errcode_t code) {
#endif
duk_context *ctx = (duk_context *) thr;
duk_bool_t double_error = thr->heap->handling_error;
#ifdef DUK_USE_VERBOSE_ERRORS
DUK_DD(DUK_DDPRINT("duk_err_create_and_throw(): code=%ld, msg=%s, filename=%s, line=%ld",
(long) code, (const char *) msg,
(const char *) filename, (long) line));
#else
DUK_DD(DUK_DDPRINT("duk_err_create_and_throw(): code=%ld", (long) code));
#endif
DUK_ASSERT(thr != NULL);
DUK_ASSERT(ctx != NULL);
thr->heap->handling_error = 1;
if (!double_error) {
/* Allow headroom for calls during error handling (see GH-191).
* We allow space for 10 additional recursions, with one extra
* for, e.g. a print() call at the deepest level.
*/
DUK_ASSERT(thr->callstack_max == DUK_CALLSTACK_DEFAULT_MAX);
thr->callstack_max = DUK_CALLSTACK_DEFAULT_MAX + DUK_CALLSTACK_GROW_STEP + 11;
}
DUK_ASSERT(thr->callstack_max == DUK_CALLSTACK_DEFAULT_MAX + DUK_CALLSTACK_GROW_STEP + 11); /* just making sure */
/* Sync so that augmentation sees up-to-date activations, NULL
* thr->ptr_curr_pc so that it's not used if side effects occur
* in augmentation or longjmp handling.
*/
duk_hthread_sync_and_null_currpc(thr);
/*
* Create and push an error object onto the top of stack.
* If a "double error" occurs, use a fixed error instance
* to avoid further trouble.
*/
/* XXX: if attempt to push beyond allocated valstack, this double fault
* handling fails miserably. We should really write the double error
* directly to thr->heap->lj.value1 and avoid valstack use entirely.
*/
if (double_error) {
if (thr->builtins[DUK_BIDX_DOUBLE_ERROR]) {
DUK_D(DUK_DPRINT("double fault detected -> push built-in fixed 'double error' instance"));
duk_push_hobject_bidx(ctx, DUK_BIDX_DOUBLE_ERROR);
} else {
DUK_D(DUK_DPRINT("double fault detected; there is no built-in fixed 'double error' instance "
"-> push the error code as a number"));
duk_push_int(ctx, (duk_int_t) code);
}
} else {
/* Error object is augmented at its creation here. */
duk_require_stack(ctx, 1);
/* XXX: unnecessary '%s' formatting here, but cannot use
* 'msg' as a format string directly.
*/
#ifdef DUK_USE_VERBOSE_ERRORS
duk_push_error_object_raw(ctx,
code | DUK_ERRCODE_FLAG_NOBLAME_FILELINE,
filename,
line,
"%s",
(const char *) msg);
#else
duk_push_error_object_raw(ctx,
code | DUK_ERRCODE_FLAG_NOBLAME_FILELINE,
NULL,
0,
NULL);
#endif
}
/*
* Augment error (throw time), unless alloc/double error
*/
if (double_error || code == DUK_ERR_ALLOC_ERROR) {
DUK_D(DUK_DPRINT("alloc or double error: skip throw augmenting to avoid further trouble"));
} else {
#if defined(DUK_USE_AUGMENT_ERROR_THROW)
DUK_DDD(DUK_DDDPRINT("THROW ERROR (INTERNAL): %!iT (before throw augment)",
(duk_tval *) duk_get_tval(ctx, -1)));
duk_err_augment_error_throw(thr);
#endif
}
/*
* Finally, longjmp
*/
duk_err_setup_heap_ljstate(thr, DUK_LJ_TYPE_THROW);
thr->callstack_max = DUK_CALLSTACK_DEFAULT_MAX; /* reset callstack limit */
thr->heap->handling_error = 0;
DUK_DDD(DUK_DDDPRINT("THROW ERROR (INTERNAL): %!iT, %!iT (after throw augment)",
(duk_tval *) &thr->heap->lj.value1, (duk_tval *) &thr->heap->lj.value2));
duk_err_longjmp(thr);
DUK_UNREACHABLE();
}
/*
* Helper for C function call negative return values.
*/
DUK_INTERNAL void duk_error_throw_from_negative_rc(duk_hthread *thr, duk_ret_t rc) {
duk_context *ctx = (duk_context *) thr;
const char *msg;
duk_errcode_t code;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(rc < 0);
/* XXX: this generates quite large code - perhaps select the error
* class based on the code and then just use the error 'name'?
*/
/* XXX: shared strings */
code = -rc;
switch (rc) {
case DUK_RET_UNIMPLEMENTED_ERROR: msg = "unimplemented"; break;
case DUK_RET_UNSUPPORTED_ERROR: msg = "unsupported"; break;
case DUK_RET_INTERNAL_ERROR: msg = "internal"; break;
case DUK_RET_ALLOC_ERROR: msg = "alloc"; break;
case DUK_RET_ASSERTION_ERROR: msg = "assertion"; break;
case DUK_RET_API_ERROR: msg = "api"; break;
case DUK_RET_UNCAUGHT_ERROR: msg = "uncaught"; break;
case DUK_RET_ERROR: msg = "error"; break;
case DUK_RET_EVAL_ERROR: msg = "eval"; break;
case DUK_RET_RANGE_ERROR: msg = "range"; break;
case DUK_RET_REFERENCE_ERROR: msg = "reference"; break;
case DUK_RET_SYNTAX_ERROR: msg = "syntax"; break;
case DUK_RET_TYPE_ERROR: msg = "type"; break;
case DUK_RET_URI_ERROR: msg = "uri"; break;
default: msg = "unknown"; break;
}
DUK_ASSERT(msg != NULL);
/*
* The __FILE__ and __LINE__ information is intentionally not used in the
* creation of the error object, as it isn't useful in the tracedata. The
* tracedata still contains the function which returned the negative return
* code, and having the file/line of this function isn't very useful.
*/
duk_error_raw(ctx, code, NULL, 0, "%s error (rc %ld)", (const char *) msg, (long) rc);
DUK_UNREACHABLE();
}
#line 1 "duk_hbuffer_alloc.c"
/*
* duk_hbuffer allocation and freeing.
*/
/* include removed: duk_internal.h */
/* Allocate a new duk_hbuffer of a certain type and return a pointer to it
* (NULL on error). Write buffer data pointer to 'out_bufdata' (only if
* allocation successful).
*/
DUK_INTERNAL duk_hbuffer *duk_hbuffer_alloc(duk_heap *heap, duk_size_t size, duk_small_uint_t flags, void **out_bufdata) {
duk_hbuffer *res = NULL;
duk_size_t header_size;
duk_size_t alloc_size;
DUK_ASSERT(heap != NULL);
DUK_ASSERT(out_bufdata != NULL);
DUK_DDD(DUK_DDDPRINT("allocate hbuffer"));
/* Size sanity check. Should not be necessary because caller is
* required to check this, but we don't want to cause a segfault
* if the size wraps either in duk_size_t computation or when
* storing the size in a 16-bit field.
*/
if (size > DUK_HBUFFER_MAX_BYTELEN) {
DUK_D(DUK_DPRINT("hbuffer alloc failed: size too large: %ld", (long) size));
return NULL; /* no need to write 'out_bufdata' */
}
if (flags & DUK_BUF_FLAG_EXTERNAL) {
header_size = sizeof(duk_hbuffer_external);
alloc_size = sizeof(duk_hbuffer_external);
} else if (flags & DUK_BUF_FLAG_DYNAMIC) {
header_size = sizeof(duk_hbuffer_dynamic);
alloc_size = sizeof(duk_hbuffer_dynamic);
} else {
header_size = sizeof(duk_hbuffer_fixed);
alloc_size = sizeof(duk_hbuffer_fixed) + size;
DUK_ASSERT(alloc_size >= sizeof(duk_hbuffer_fixed)); /* no wrapping */
}
res = (duk_hbuffer *) DUK_ALLOC(heap, alloc_size);
if (!res) {
goto error;
}
/* zero everything unless requested not to do so */
#if defined(DUK_USE_ZERO_BUFFER_DATA)
DUK_MEMZERO((void *) res,
(flags & DUK_BUF_FLAG_NOZERO) ? header_size : alloc_size);
#else
DUK_MEMZERO((void *) res, header_size);
#endif
if (flags & DUK_BUF_FLAG_EXTERNAL) {
duk_hbuffer_external *h;
h = (duk_hbuffer_external *) res;
DUK_UNREF(h);
*out_bufdata = NULL;
#if defined(DUK_USE_EXPLICIT_NULL_INIT)
#if defined(DUK_USE_HEAPPTR16)
/* the compressed pointer is zeroed which maps to NULL, so nothing to do. */
#else
DUK_HBUFFER_EXTERNAL_SET_DATA_PTR(heap, h, NULL);
#endif
#endif
DUK_ASSERT(DUK_HBUFFER_EXTERNAL_GET_DATA_PTR(heap, h) == NULL);
} else if (flags & DUK_BUF_FLAG_DYNAMIC) {
duk_hbuffer_dynamic *h = (duk_hbuffer_dynamic *) res;
void *ptr;
if (size > 0) {
DUK_ASSERT(!(flags & DUK_BUF_FLAG_EXTERNAL)); /* alloc external with size zero */
DUK_DDD(DUK_DDDPRINT("dynamic buffer with nonzero size, alloc actual buffer"));
#ifdef DUK_USE_ZERO_BUFFER_DATA
ptr = DUK_ALLOC_ZEROED(heap, size);
#else
ptr = DUK_ALLOC(heap, size);
#endif
if (!ptr) {
/* Because size > 0, NULL check is correct */
goto error;
}
*out_bufdata = ptr;
DUK_HBUFFER_DYNAMIC_SET_DATA_PTR(heap, h, ptr);
} else {
*out_bufdata = NULL;
#if defined(DUK_USE_EXPLICIT_NULL_INIT)
#if defined(DUK_USE_HEAPPTR16)
/* the compressed pointer is zeroed which maps to NULL, so nothing to do. */
#else
DUK_HBUFFER_DYNAMIC_SET_DATA_PTR(heap, h, NULL);
#endif
#endif
DUK_ASSERT(DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(heap, h) == NULL);
}
} else {
*out_bufdata = (void *) ((duk_hbuffer_fixed *) res + 1);
}
DUK_HBUFFER_SET_SIZE(res, size);
DUK_HEAPHDR_SET_TYPE(&res->hdr, DUK_HTYPE_BUFFER);
if (flags & DUK_BUF_FLAG_DYNAMIC) {
DUK_HBUFFER_SET_DYNAMIC(res);
if (flags & DUK_BUF_FLAG_EXTERNAL) {
DUK_HBUFFER_SET_EXTERNAL(res);
}
} else {
DUK_ASSERT(!(flags & DUK_BUF_FLAG_EXTERNAL));
}
DUK_HEAP_INSERT_INTO_HEAP_ALLOCATED(heap, &res->hdr);
DUK_DDD(DUK_DDDPRINT("allocated hbuffer: %p", (void *) res));
return res;
error:
DUK_DD(DUK_DDPRINT("hbuffer allocation failed"));
DUK_FREE(heap, res);
return NULL; /* no need to write 'out_bufdata' */
}
/* For indirect allocs. */
DUK_INTERNAL void *duk_hbuffer_get_dynalloc_ptr(duk_heap *heap, void *ud) {
duk_hbuffer_dynamic *buf = (duk_hbuffer_dynamic *) ud;
DUK_UNREF(heap);
return (void *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(heap, buf);
}
#line 1 "duk_hbuffer_ops.c"
/*
* duk_hbuffer operations such as resizing and inserting/appending data to
* a dynamic buffer.
*
* Append operations append to the end of the buffer and they are relatively
* efficient: the buffer is grown with a "spare" part relative to the buffer
* size to minimize reallocations. Insert operations need to move existing
* data forward in the buffer with memmove() and are not very efficient.
* They are used e.g. by the regexp compiler to "backpatch" regexp bytecode.
*/
/* include removed: duk_internal.h */
/*
* Resizing
*/
DUK_INTERNAL void duk_hbuffer_resize(duk_hthread *thr, duk_hbuffer_dynamic *buf, duk_size_t new_size) {
void *res;
duk_size_t prev_size;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(buf != NULL);
DUK_ASSERT(DUK_HBUFFER_HAS_DYNAMIC(buf));
DUK_ASSERT(!DUK_HBUFFER_HAS_EXTERNAL(buf));
/*
* Maximum size check
*/
if (new_size > DUK_HBUFFER_MAX_BYTELEN) {
DUK_ERROR_RANGE(thr, "buffer too long");
}
/*
* Note: use indirect realloc variant just in case mark-and-sweep
* (finalizers) might resize this same buffer during garbage
* collection.
*/
res = DUK_REALLOC_INDIRECT(thr->heap, duk_hbuffer_get_dynalloc_ptr, (void *) buf, new_size);
if (res != NULL || new_size == 0) {
/* 'res' may be NULL if new allocation size is 0. */
DUK_DDD(DUK_DDDPRINT("resized dynamic buffer %p:%ld -> %p:%ld",
(void *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, buf),
(long) DUK_HBUFFER_DYNAMIC_GET_SIZE(buf),
(void *) res,
(long) new_size));
/*
* The entire allocated buffer area, regardless of actual used
* size, is kept zeroed in resizes for simplicity. If the buffer
* is grown, zero the new part.
*/
prev_size = DUK_HBUFFER_DYNAMIC_GET_SIZE(buf);
if (new_size > prev_size) {
DUK_ASSERT(new_size - prev_size > 0);
#ifdef DUK_USE_ZERO_BUFFER_DATA
DUK_MEMZERO((void *) ((char *) res + prev_size),
(duk_size_t) (new_size - prev_size));
#endif
}
DUK_HBUFFER_DYNAMIC_SET_SIZE(buf, new_size);
DUK_HBUFFER_DYNAMIC_SET_DATA_PTR(thr->heap, buf, res);
} else {
DUK_ERROR_ALLOC_DEFMSG(thr);
}
DUK_ASSERT(res != NULL || new_size == 0);
}
DUK_INTERNAL void duk_hbuffer_reset(duk_hthread *thr, duk_hbuffer_dynamic *buf) {
DUK_ASSERT(thr != NULL);
DUK_ASSERT(buf != NULL);
DUK_ASSERT(DUK_HBUFFER_HAS_DYNAMIC(buf));
DUK_ASSERT(!DUK_HBUFFER_HAS_EXTERNAL(buf));
duk_hbuffer_resize(thr, buf, 0);
}
/* include removed: duk_internal.h */
#line 2 "duk_hbufferobject_misc.c"
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
DUK_INTERNAL duk_uint_t duk_hbufferobject_clamp_bytelength(duk_hbufferobject *h_bufobj, duk_uint_t len) {
duk_uint_t buf_size;
duk_uint_t buf_avail;
DUK_ASSERT(h_bufobj != NULL);
DUK_ASSERT(h_bufobj->buf != NULL);
buf_size = (duk_uint_t) DUK_HBUFFER_GET_SIZE(h_bufobj->buf);
if (h_bufobj->offset > buf_size) {
/* Slice starting point is beyond current length. */
return 0;
}
buf_avail = buf_size - h_bufobj->offset;
return buf_avail >= len ? len : buf_avail;
}
#endif /* DUK_USE_BUFFEROBJECT_SUPPORT */
#line 1 "duk_heap_alloc.c"
/*
* duk_heap allocation and freeing.
*/
/* include removed: duk_internal.h */
/* Constants for built-in string data depacking. */
#define DUK__BITPACK_LETTER_LIMIT 26
#define DUK__BITPACK_UNDERSCORE 26
#define DUK__BITPACK_FF 27
#define DUK__BITPACK_SWITCH1 29
#define DUK__BITPACK_SWITCH 30
#define DUK__BITPACK_SEVENBIT 31
#if defined(DUK_USE_ROM_STRINGS)
/* Fixed seed value used with ROM strings. */
#define DUK__FIXED_HASH_SEED 0xabcd1234
#endif
/*
* Free a heap object.
*
* Free heap object and its internal (non-heap) pointers. Assumes that
* caller has removed the object from heap allocated list or the string
* intern table, and any weak references (which strings may have) have
* been already dealt with.
*/
DUK_INTERNAL void duk_free_hobject_inner(duk_heap *heap, duk_hobject *h) {
DUK_ASSERT(heap != NULL);
DUK_ASSERT(h != NULL);
DUK_FREE(heap, DUK_HOBJECT_GET_PROPS(heap, h));
if (DUK_HOBJECT_IS_COMPILEDFUNCTION(h)) {
duk_hcompiledfunction *f = (duk_hcompiledfunction *) h;
DUK_UNREF(f);
/* Currently nothing to free; 'data' is a heap object */
} else if (DUK_HOBJECT_IS_NATIVEFUNCTION(h)) {
duk_hnativefunction *f = (duk_hnativefunction *) h;
DUK_UNREF(f);
/* Currently nothing to free */
} else if (DUK_HOBJECT_IS_THREAD(h)) {
duk_hthread *t = (duk_hthread *) h;
DUK_FREE(heap, t->valstack);
DUK_FREE(heap, t->callstack);
DUK_FREE(heap, t->catchstack);
/* Don't free h->resumer because it exists in the heap.
* Callstack entries also contain function pointers which
* are not freed for the same reason.
*/
/* XXX: with 'caller' property the callstack would need
* to be unwound to update the 'caller' properties of
* functions in the callstack.
*/
}
}
DUK_INTERNAL void duk_free_hbuffer_inner(duk_heap *heap, duk_hbuffer *h) {
DUK_ASSERT(heap != NULL);
DUK_ASSERT(h != NULL);
if (DUK_HBUFFER_HAS_DYNAMIC(h) && !DUK_HBUFFER_HAS_EXTERNAL(h)) {
duk_hbuffer_dynamic *g = (duk_hbuffer_dynamic *) h;
DUK_DDD(DUK_DDDPRINT("free dynamic buffer %p", (void *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(heap, g)));
DUK_FREE(heap, DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(heap, g));
}
}
DUK_INTERNAL void duk_free_hstring_inner(duk_heap *heap, duk_hstring *h) {
DUK_ASSERT(heap != NULL);
DUK_ASSERT(h != NULL);
DUK_UNREF(heap);
DUK_UNREF(h);
#if defined(DUK_USE_HSTRING_EXTDATA) && defined(DUK_USE_EXTSTR_FREE)
if (DUK_HSTRING_HAS_EXTDATA(h)) {
DUK_DDD(DUK_DDDPRINT("free extstr: hstring %!O, extdata: %p",
h, DUK_HSTRING_GET_EXTDATA((duk_hstring_external *) h)));
DUK_USE_EXTSTR_FREE(heap->heap_udata, (const void *) DUK_HSTRING_GET_EXTDATA((duk_hstring_external *) h));
}
#endif
}
DUK_INTERNAL void duk_heap_free_heaphdr_raw(duk_heap *heap, duk_heaphdr *hdr) {
DUK_ASSERT(heap);
DUK_ASSERT(hdr);
DUK_DDD(DUK_DDDPRINT("free heaphdr %p, htype %ld", (void *) hdr, (long) DUK_HEAPHDR_GET_TYPE(hdr)));
switch ((int) DUK_HEAPHDR_GET_TYPE(hdr)) {
case DUK_HTYPE_STRING:
duk_free_hstring_inner(heap, (duk_hstring *) hdr);
break;
case DUK_HTYPE_OBJECT:
duk_free_hobject_inner(heap, (duk_hobject *) hdr);
break;
case DUK_HTYPE_BUFFER:
duk_free_hbuffer_inner(heap, (duk_hbuffer *) hdr);
break;
default:
DUK_UNREACHABLE();
}
DUK_FREE(heap, hdr);
}
/*
* Free the heap.
*
* Frees heap-related non-heap-tracked allocations such as the
* string intern table; then frees the heap allocated objects;
* and finally frees the heap structure itself. Reference counts
* and GC markers are ignored (and not updated) in this process,
* and finalizers won't be called.
*
* The heap pointer and heap object pointers must not be used
* after this call.
*/
DUK_LOCAL void duk__free_allocated(duk_heap *heap) {
duk_heaphdr *curr;
duk_heaphdr *next;
curr = heap->heap_allocated;
while (curr) {
/* We don't log or warn about freeing zero refcount objects
* because they may happen with finalizer processing.
*/
DUK_DDD(DUK_DDDPRINT("FINALFREE (allocated): %!iO",
(duk_heaphdr *) curr));
next = DUK_HEAPHDR_GET_NEXT(heap, curr);
duk_heap_free_heaphdr_raw(heap, curr);
curr = next;
}
}
#if defined(DUK_USE_REFERENCE_COUNTING)
DUK_LOCAL void duk__free_refzero_list(duk_heap *heap) {
duk_heaphdr *curr;
duk_heaphdr *next;
curr = heap->refzero_list;
while (curr) {
DUK_DDD(DUK_DDDPRINT("FINALFREE (refzero_list): %!iO",
(duk_heaphdr *) curr));
next = DUK_HEAPHDR_GET_NEXT(heap, curr);
duk_heap_free_heaphdr_raw(heap, curr);
curr = next;
}
}
#endif
#if defined(DUK_USE_MARK_AND_SWEEP)
DUK_LOCAL void duk__free_markandsweep_finalize_list(duk_heap *heap) {
duk_heaphdr *curr;
duk_heaphdr *next;
curr = heap->finalize_list;
while (curr) {
DUK_DDD(DUK_DDDPRINT("FINALFREE (finalize_list): %!iO",
(duk_heaphdr *) curr));
next = DUK_HEAPHDR_GET_NEXT(heap, curr);
duk_heap_free_heaphdr_raw(heap, curr);
curr = next;
}
}
#endif
DUK_LOCAL void duk__free_stringtable(duk_heap *heap) {
/* strings are only tracked by stringtable */
duk_heap_free_strtab(heap);
}
DUK_LOCAL void duk__free_run_finalizers(duk_heap *heap) {
duk_hthread *thr;
duk_heaphdr *curr;
duk_uint_t round_no;
duk_size_t count_all;
duk_size_t count_finalized;
duk_size_t curr_limit;
DUK_ASSERT(heap != NULL);
DUK_ASSERT(heap->heap_thread != NULL);
#if defined(DUK_USE_REFERENCE_COUNTING)
DUK_ASSERT(heap->refzero_list == NULL); /* refzero not running -> must be empty */
#endif
#if defined(DUK_USE_MARK_AND_SWEEP)
DUK_ASSERT(heap->finalize_list == NULL); /* mark-and-sweep not running -> must be empty */
#endif
/* XXX: here again finalizer thread is the heap_thread which needs
* to be coordinated with finalizer thread fixes.
*/
thr = heap->heap_thread;
DUK_ASSERT(thr != NULL);
/* Prevent mark-and-sweep for the pending finalizers, also prevents
* refzero handling from moving objects away from the heap_allocated
* list. (The flag meaning is slightly abused here.)
*/
DUK_ASSERT(!DUK_HEAP_HAS_MARKANDSWEEP_RUNNING(heap));
DUK_HEAP_SET_MARKANDSWEEP_RUNNING(heap);
curr_limit = 0; /* suppress warning, not used */
for (round_no = 0; ; round_no++) {
curr = heap->heap_allocated;
count_all = 0;
count_finalized = 0;
while (curr) {
count_all++;
if (DUK_HEAPHDR_GET_TYPE(curr) == DUK_HTYPE_OBJECT) {
/* Only objects in heap_allocated may have finalizers. Check that
* the object itself has a _Finalizer property (own or inherited)
* so that we don't execute finalizers for e.g. Proxy objects.
*/
DUK_ASSERT(thr != NULL);
DUK_ASSERT(curr != NULL);
if (duk_hobject_hasprop_raw(thr, (duk_hobject *) curr, DUK_HTHREAD_STRING_INT_FINALIZER(thr))) {
if (!DUK_HEAPHDR_HAS_FINALIZED((duk_heaphdr *) curr)) {
DUK_ASSERT(DUK_HEAP_HAS_FINALIZER_NORESCUE(heap)); /* maps to finalizer 2nd argument */
duk_hobject_run_finalizer(thr, (duk_hobject *) curr);
count_finalized++;
}
}
}
curr = DUK_HEAPHDR_GET_NEXT(heap, curr);
}
/* Each round of finalizer execution may spawn new finalizable objects
* which is normal behavior for some applications. Allow multiple
* rounds of finalization, but use a shrinking limit based on the
* first round to detect the case where a runaway finalizer creates
* an unbounded amount of new finalizable objects. Finalizer rescue
* is not supported: the semantics are unclear because most of the
* objects being finalized here are already reachable. The finalizer
* is given a boolean to indicate that rescue is not possible.
*
* See discussion in: https://github.com/svaarala/duktape/pull/473
*/
if (round_no == 0) {
/* Cannot wrap: each object is at least 8 bytes so count is
* at most 1/8 of that.
*/
curr_limit = count_all * 2;
} else {
curr_limit = (curr_limit * 3) / 4; /* Decrease by 25% every round */
}
DUK_D(DUK_DPRINT("finalizer round %ld complete, %ld objects, tried to execute %ld finalizers, current limit is %ld",
(long) round_no, (long) count_all, (long) count_finalized, (long) curr_limit));
if (count_finalized == 0) {
DUK_D(DUK_DPRINT("no more finalizable objects, forced finalization finished"));
break;
}
if (count_finalized >= curr_limit) {
DUK_D(DUK_DPRINT("finalizer count above limit, potentially runaway finalizer; skip remaining finalizers"));
break;
}
}
DUK_ASSERT(DUK_HEAP_HAS_MARKANDSWEEP_RUNNING(heap));
DUK_HEAP_CLEAR_MARKANDSWEEP_RUNNING(heap);
}
DUK_INTERNAL void duk_heap_free(duk_heap *heap) {
DUK_D(DUK_DPRINT("free heap: %p", (void *) heap));
#if defined(DUK_USE_DEBUG)
duk_heap_dump_strtab(heap);
#endif
#if defined(DUK_USE_DEBUGGER_SUPPORT)
/* Detach a debugger if attached (can be called multiple times)
* safely.
*/
/* XXX: Add a flag to reject an attempt to re-attach? Otherwise
* the detached callback may immediately reattach.
*/
duk_debug_do_detach(heap);
#endif
/* Execute finalizers before freeing the heap, even for reachable
* objects, and regardless of whether or not mark-and-sweep is
* enabled. This gives finalizers the chance to free any native
* resources like file handles, allocations made outside Duktape,
* etc. This is quite tricky to get right, so that all finalizer
* guarantees are honored.
*
* XXX: this perhaps requires an execution time limit.
*/
DUK_D(DUK_DPRINT("execute finalizers before freeing heap"));
#if defined(DUK_USE_MARK_AND_SWEEP)
/* Run mark-and-sweep a few times just in case (unreachable object
* finalizers run already here). The last round must rescue objects
* from the previous round without running any more finalizers. This
* ensures rescued objects get their FINALIZED flag cleared so that
* their finalizer is called once more in forced finalization to
* satisfy finalizer guarantees. However, we don't want to run any
* more finalizer because that'd required one more loop, and so on.
*/
DUK_D(DUK_DPRINT("forced gc #1 in heap destruction"));
duk_heap_mark_and_sweep(heap, 0);
DUK_D(DUK_DPRINT("forced gc #2 in heap destruction"));
duk_heap_mark_and_sweep(heap, 0);
DUK_D(DUK_DPRINT("forced gc #3 in heap destruction (don't run finalizers)"));
duk_heap_mark_and_sweep(heap, DUK_MS_FLAG_SKIP_FINALIZERS); /* skip finalizers; queue finalizable objects to heap_allocated */
#endif
DUK_HEAP_SET_FINALIZER_NORESCUE(heap); /* rescue no longer supported */
duk__free_run_finalizers(heap);
/* Note: heap->heap_thread, heap->curr_thread, and heap->heap_object
* are on the heap allocated list.
*/
DUK_D(DUK_DPRINT("freeing heap objects of heap: %p", (void *) heap));
duk__free_allocated(heap);
#if defined(DUK_USE_REFERENCE_COUNTING)
DUK_D(DUK_DPRINT("freeing refzero list of heap: %p", (void *) heap));
duk__free_refzero_list(heap);
#endif
#if defined(DUK_USE_MARK_AND_SWEEP)
DUK_D(DUK_DPRINT("freeing mark-and-sweep finalize list of heap: %p", (void *) heap));
duk__free_markandsweep_finalize_list(heap);
#endif
DUK_D(DUK_DPRINT("freeing string table of heap: %p", (void *) heap));
duk__free_stringtable(heap);
DUK_D(DUK_DPRINT("freeing heap structure: %p", (void *) heap));
heap->free_func(heap->heap_udata, heap);
}
/*
* Allocate a heap.
*
* String table is initialized with built-in strings from genbuiltins.py,
* either by dynamically creating the strings or by referring to ROM strings.
*/
#if defined(DUK_USE_ROM_STRINGS)
DUK_LOCAL duk_bool_t duk__init_heap_strings(duk_heap *heap) {
#if defined(DUK_USE_ASSERTIONS)
duk_small_uint_t i;
#endif
/* With ROM-based strings, heap->strs[] and thr->strs[] are omitted
* so nothing to initialize for strs[].
*/
#if defined(DUK_USE_ASSERTIONS)
for (i = 0; i < sizeof(duk_rom_strings) / sizeof(const duk_hstring *); i++) {
duk_uint32_t hash;
const duk_hstring *h;
h = duk_rom_strings[i];
DUK_ASSERT(h != NULL);
hash = duk_heap_hashstring(heap, (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h), DUK_HSTRING_GET_BYTELEN(h));
DUK_DD(DUK_DDPRINT("duk_rom_strings[%d] -> hash 0x%08lx, computed 0x%08lx",
(int) i, (unsigned long) DUK_HSTRING_GET_HASH(h), (unsigned long) hash));
DUK_ASSERT(hash == (duk_uint32_t) DUK_HSTRING_GET_HASH(h));
}
#endif
return 1;
}
#else /* DUK_USE_ROM_STRINGS */
DUK_LOCAL duk_bool_t duk__init_heap_strings(duk_heap *heap) {
duk_bitdecoder_ctx bd_ctx;
duk_bitdecoder_ctx *bd = &bd_ctx; /* convenience */
duk_small_uint_t i, j;
DUK_MEMZERO(&bd_ctx, sizeof(bd_ctx));
bd->data = (const duk_uint8_t *) duk_strings_data;
bd->length = (duk_size_t) DUK_STRDATA_DATA_LENGTH;
for (i = 0; i < DUK_HEAP_NUM_STRINGS; i++) {
duk_uint8_t tmp[DUK_STRDATA_MAX_STRLEN];
duk_hstring *h;
duk_small_uint_t len;
duk_small_uint_t mode;
duk_small_uint_t t;
len = duk_bd_decode(bd, 5);
mode = 32; /* 0 = uppercase, 32 = lowercase (= 'a' - 'A') */
for (j = 0; j < len; j++) {
t = duk_bd_decode(bd, 5);
if (t < DUK__BITPACK_LETTER_LIMIT) {
t = t + DUK_ASC_UC_A + mode;
} else if (t == DUK__BITPACK_UNDERSCORE) {
t = DUK_ASC_UNDERSCORE;
} else if (t == DUK__BITPACK_FF) {
/* Internal keys are prefixed with 0xFF in the stringtable
* (which makes them invalid UTF-8 on purpose).
*/
t = 0xff;
} else if (t == DUK__BITPACK_SWITCH1) {
t = duk_bd_decode(bd, 5);
DUK_ASSERT_DISABLE(t >= 0); /* unsigned */
DUK_ASSERT(t <= 25);
t = t + DUK_ASC_UC_A + (mode ^ 32);
} else if (t == DUK__BITPACK_SWITCH) {
mode = mode ^ 32;
t = duk_bd_decode(bd, 5);
DUK_ASSERT_DISABLE(t >= 0);
DUK_ASSERT(t <= 25);
t = t + DUK_ASC_UC_A + mode;
} else if (t == DUK__BITPACK_SEVENBIT) {
t = duk_bd_decode(bd, 7);
}
tmp[j] = (duk_uint8_t) t;
}
/* No need to length check string: it will never exceed even
* the 16-bit length maximum.
*/
DUK_ASSERT(len <= 0xffffUL);
DUK_DDD(DUK_DDDPRINT("intern built-in string %ld", (long) i));
h = duk_heap_string_intern(heap, tmp, len);
if (!h) {
goto error;
}
DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) h));
/* Special flags checks. Since these strings are always
* reachable and a string cannot appear twice in the string
* table, there's no need to check/set these flags elsewhere.
* The 'internal' flag is set by string intern code.
*/
if (i == DUK_STRIDX_EVAL || i == DUK_STRIDX_LC_ARGUMENTS) {
DUK_HSTRING_SET_EVAL_OR_ARGUMENTS(h);
}
if (i >= DUK_STRIDX_START_RESERVED && i < DUK_STRIDX_END_RESERVED) {
DUK_HSTRING_SET_RESERVED_WORD(h);
if (i >= DUK_STRIDX_START_STRICT_RESERVED) {
DUK_HSTRING_SET_STRICT_RESERVED_WORD(h);
}
}
DUK_DDD(DUK_DDDPRINT("interned: %!O", (duk_heaphdr *) h));
/* XXX: The incref macro takes a thread pointer but doesn't
* use it right now.
*/
DUK_HSTRING_INCREF(_never_referenced_, h);
#if defined(DUK_USE_HEAPPTR16)
heap->strs16[i] = DUK_USE_HEAPPTR_ENC16(heap->heap_udata, (void *) h);
#else
heap->strs[i] = h;
#endif
}
return 1;
error:
return 0;
}
#endif /* DUK_USE_ROM_STRINGS */
DUK_LOCAL duk_bool_t duk__init_heap_thread(duk_heap *heap) {
duk_hthread *thr;
DUK_DD(DUK_DDPRINT("heap init: alloc heap thread"));
thr = duk_hthread_alloc(heap,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_THREAD |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_THREAD));
if (!thr) {
DUK_D(DUK_DPRINT("failed to alloc heap_thread"));
return 0;
}
thr->state = DUK_HTHREAD_STATE_INACTIVE;
#if defined(DUK_USE_ROM_STRINGS)
/* No strs[] pointer. */
#else /* DUK_USE_ROM_STRINGS */
#if defined(DUK_USE_HEAPPTR16)
thr->strs16 = heap->strs16;
#else
thr->strs = heap->strs;
#endif
#endif /* DUK_USE_ROM_STRINGS */
heap->heap_thread = thr;
DUK_HTHREAD_INCREF(thr, thr); /* Note: first argument not really used */
/* 'thr' is now reachable */
if (!duk_hthread_init_stacks(heap, thr)) {
return 0;
}
/* XXX: this may now fail, and is not handled correctly */
duk_hthread_create_builtin_objects(thr);
/* default prototype (Note: 'thr' must be reachable) */
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, (duk_hobject *) thr, thr->builtins[DUK_BIDX_THREAD_PROTOTYPE]);
return 1;
}
#if defined(DUK_USE_DEBUG)
#define DUK__DUMPSZ(t) do { \
DUK_D(DUK_DPRINT("" #t "=%ld", (long) sizeof(t))); \
} while (0)
/* These is not 100% because format would need to be non-portable "long long".
* Also print out as doubles to catch cases where the "long" type is not wide
* enough; the limits will then not be printed accurately but the magnitude
* will be correct.
*/
#define DUK__DUMPLM_SIGNED_RAW(t,a,b) do { \
DUK_D(DUK_DPRINT(t "=[%ld,%ld]=[%lf,%lf]", \
(long) (a), (long) (b), \
(double) (a), (double) (b))); \
} while (0)
#define DUK__DUMPLM_UNSIGNED_RAW(t,a,b) do { \
DUK_D(DUK_DPRINT(t "=[%lu,%lu]=[%lf,%lf]", \
(unsigned long) (a), (unsigned long) (b), \
(double) (a), (double) (b))); \
} while (0)
#define DUK__DUMPLM_SIGNED(t) do { \
DUK__DUMPLM_SIGNED_RAW("DUK_" #t "_{MIN,MAX}", DUK_##t##_MIN, DUK_##t##_MAX); \
} while (0)
#define DUK__DUMPLM_UNSIGNED(t) do { \
DUK__DUMPLM_UNSIGNED_RAW("DUK_" #t "_{MIN,MAX}", DUK_##t##_MIN, DUK_##t##_MAX); \
} while (0)
DUK_LOCAL void duk__dump_type_sizes(void) {
DUK_D(DUK_DPRINT("sizeof()"));
/* basic platform types */
DUK__DUMPSZ(char);
DUK__DUMPSZ(short);
DUK__DUMPSZ(int);
DUK__DUMPSZ(long);
DUK__DUMPSZ(double);
DUK__DUMPSZ(void *);
DUK__DUMPSZ(size_t);
/* basic types from duk_features.h */
DUK__DUMPSZ(duk_uint8_t);
DUK__DUMPSZ(duk_int8_t);
DUK__DUMPSZ(duk_uint16_t);
DUK__DUMPSZ(duk_int16_t);
DUK__DUMPSZ(duk_uint32_t);
DUK__DUMPSZ(duk_int32_t);
DUK__DUMPSZ(duk_uint64_t);
DUK__DUMPSZ(duk_int64_t);
DUK__DUMPSZ(duk_uint_least8_t);
DUK__DUMPSZ(duk_int_least8_t);
DUK__DUMPSZ(duk_uint_least16_t);
DUK__DUMPSZ(duk_int_least16_t);
DUK__DUMPSZ(duk_uint_least32_t);
DUK__DUMPSZ(duk_int_least32_t);
#if defined(DUK_USE_64BIT_OPS)
DUK__DUMPSZ(duk_uint_least64_t);
DUK__DUMPSZ(duk_int_least64_t);
#endif
DUK__DUMPSZ(duk_uint_fast8_t);
DUK__DUMPSZ(duk_int_fast8_t);
DUK__DUMPSZ(duk_uint_fast16_t);
DUK__DUMPSZ(duk_int_fast16_t);
DUK__DUMPSZ(duk_uint_fast32_t);
DUK__DUMPSZ(duk_int_fast32_t);
#if defined(DUK_USE_64BIT_OPS)
DUK__DUMPSZ(duk_uint_fast64_t);
DUK__DUMPSZ(duk_int_fast64_t);
#endif
DUK__DUMPSZ(duk_uintptr_t);
DUK__DUMPSZ(duk_intptr_t);
DUK__DUMPSZ(duk_uintmax_t);
DUK__DUMPSZ(duk_intmax_t);
DUK__DUMPSZ(duk_double_t);
/* important chosen base types */
DUK__DUMPSZ(duk_int_t);
DUK__DUMPSZ(duk_uint_t);
DUK__DUMPSZ(duk_int_fast_t);
DUK__DUMPSZ(duk_uint_fast_t);
DUK__DUMPSZ(duk_small_int_t);
DUK__DUMPSZ(duk_small_uint_t);
DUK__DUMPSZ(duk_small_int_fast_t);
DUK__DUMPSZ(duk_small_uint_fast_t);
/* some derived types */
DUK__DUMPSZ(duk_codepoint_t);
DUK__DUMPSZ(duk_ucodepoint_t);
DUK__DUMPSZ(duk_idx_t);
DUK__DUMPSZ(duk_errcode_t);
DUK__DUMPSZ(duk_uarridx_t);
/* tval */
DUK__DUMPSZ(duk_double_union);
DUK__DUMPSZ(duk_tval);
/* structs from duk_forwdecl.h */
DUK__DUMPSZ(duk_jmpbuf); /* just one 'int' for C++ exceptions */
DUK__DUMPSZ(duk_heaphdr);
DUK__DUMPSZ(duk_heaphdr_string);
DUK__DUMPSZ(duk_hstring);
DUK__DUMPSZ(duk_hstring_external);
DUK__DUMPSZ(duk_hobject);
DUK__DUMPSZ(duk_hcompiledfunction);
DUK__DUMPSZ(duk_hnativefunction);
DUK__DUMPSZ(duk_hthread);
DUK__DUMPSZ(duk_hbuffer);
DUK__DUMPSZ(duk_hbuffer_fixed);
DUK__DUMPSZ(duk_hbuffer_dynamic);
DUK__DUMPSZ(duk_hbuffer_external);
DUK__DUMPSZ(duk_propaccessor);
DUK__DUMPSZ(duk_propvalue);
DUK__DUMPSZ(duk_propdesc);
DUK__DUMPSZ(duk_heap);
#if defined(DUK_USE_STRTAB_CHAIN)
DUK__DUMPSZ(duk_strtab_entry);
#endif
DUK__DUMPSZ(duk_activation);
DUK__DUMPSZ(duk_catcher);
DUK__DUMPSZ(duk_strcache);
DUK__DUMPSZ(duk_ljstate);
DUK__DUMPSZ(duk_fixedbuffer);
DUK__DUMPSZ(duk_bitdecoder_ctx);
DUK__DUMPSZ(duk_bitencoder_ctx);
DUK__DUMPSZ(duk_token);
DUK__DUMPSZ(duk_re_token);
DUK__DUMPSZ(duk_lexer_point);
DUK__DUMPSZ(duk_lexer_ctx);
DUK__DUMPSZ(duk_compiler_instr);
DUK__DUMPSZ(duk_compiler_func);
DUK__DUMPSZ(duk_compiler_ctx);
DUK__DUMPSZ(duk_re_matcher_ctx);
DUK__DUMPSZ(duk_re_compiler_ctx);
}
DUK_LOCAL void duk__dump_type_limits(void) {
DUK_D(DUK_DPRINT("limits"));
/* basic types */
DUK__DUMPLM_SIGNED(INT8);
DUK__DUMPLM_UNSIGNED(UINT8);
DUK__DUMPLM_SIGNED(INT_FAST8);
DUK__DUMPLM_UNSIGNED(UINT_FAST8);
DUK__DUMPLM_SIGNED(INT_LEAST8);
DUK__DUMPLM_UNSIGNED(UINT_LEAST8);
DUK__DUMPLM_SIGNED(INT16);
DUK__DUMPLM_UNSIGNED(UINT16);
DUK__DUMPLM_SIGNED(INT_FAST16);
DUK__DUMPLM_UNSIGNED(UINT_FAST16);
DUK__DUMPLM_SIGNED(INT_LEAST16);
DUK__DUMPLM_UNSIGNED(UINT_LEAST16);
DUK__DUMPLM_SIGNED(INT32);
DUK__DUMPLM_UNSIGNED(UINT32);
DUK__DUMPLM_SIGNED(INT_FAST32);
DUK__DUMPLM_UNSIGNED(UINT_FAST32);
DUK__DUMPLM_SIGNED(INT_LEAST32);
DUK__DUMPLM_UNSIGNED(UINT_LEAST32);
#if defined(DUK_USE_64BIT_OPS)
DUK__DUMPLM_SIGNED(INT64);
DUK__DUMPLM_UNSIGNED(UINT64);
DUK__DUMPLM_SIGNED(INT_FAST64);
DUK__DUMPLM_UNSIGNED(UINT_FAST64);
DUK__DUMPLM_SIGNED(INT_LEAST64);
DUK__DUMPLM_UNSIGNED(UINT_LEAST64);
#endif
DUK__DUMPLM_SIGNED(INTPTR);
DUK__DUMPLM_UNSIGNED(UINTPTR);
DUK__DUMPLM_SIGNED(INTMAX);
DUK__DUMPLM_UNSIGNED(UINTMAX);
/* derived types */
DUK__DUMPLM_SIGNED(INT);
DUK__DUMPLM_UNSIGNED(UINT);
DUK__DUMPLM_SIGNED(INT_FAST);
DUK__DUMPLM_UNSIGNED(UINT_FAST);
DUK__DUMPLM_SIGNED(SMALL_INT);
DUK__DUMPLM_UNSIGNED(SMALL_UINT);
DUK__DUMPLM_SIGNED(SMALL_INT_FAST);
DUK__DUMPLM_UNSIGNED(SMALL_UINT_FAST);
}
#undef DUK__DUMPSZ
#undef DUK__DUMPLM_SIGNED_RAW
#undef DUK__DUMPLM_UNSIGNED_RAW
#undef DUK__DUMPLM_SIGNED
#undef DUK__DUMPLM_UNSIGNED
DUK_LOCAL void duk__dump_misc_options(void) {
DUK_D(DUK_DPRINT("DUK_VERSION: %ld", (long) DUK_VERSION));
DUK_D(DUK_DPRINT("DUK_GIT_DESCRIBE: %s", DUK_GIT_DESCRIBE));
DUK_D(DUK_DPRINT("OS string: %s", DUK_USE_OS_STRING));
DUK_D(DUK_DPRINT("architecture string: %s", DUK_USE_ARCH_STRING));
DUK_D(DUK_DPRINT("compiler string: %s", DUK_USE_COMPILER_STRING));
#if defined(DUK_USE_PACKED_TVAL)
DUK_D(DUK_DPRINT("DUK_USE_PACKED_TVAL: yes"));
#else
DUK_D(DUK_DPRINT("DUK_USE_PACKED_TVAL: no"));
#endif
#if defined(DUK_USE_VARIADIC_MACROS)
DUK_D(DUK_DPRINT("DUK_USE_VARIADIC_MACROS: yes"));
#else
DUK_D(DUK_DPRINT("DUK_USE_VARIADIC_MACROS: no"));
#endif
#if defined(DUK_USE_INTEGER_LE)
DUK_D(DUK_DPRINT("integer endianness: little"));
#elif defined(DUK_USE_INTEGER_ME)
DUK_D(DUK_DPRINT("integer endianness: mixed"));
#elif defined(DUK_USE_INTEGER_BE)
DUK_D(DUK_DPRINT("integer endianness: big"));
#else
DUK_D(DUK_DPRINT("integer endianness: ???"));
#endif
#if defined(DUK_USE_DOUBLE_LE)
DUK_D(DUK_DPRINT("IEEE double endianness: little"));
#elif defined(DUK_USE_DOUBLE_ME)
DUK_D(DUK_DPRINT("IEEE double endianness: mixed"));
#elif defined(DUK_USE_DOUBLE_BE)
DUK_D(DUK_DPRINT("IEEE double endianness: big"));
#else
DUK_D(DUK_DPRINT("IEEE double endianness: ???"));
#endif
}
#endif /* DUK_USE_DEBUG */
DUK_INTERNAL
duk_heap *duk_heap_alloc(duk_alloc_function alloc_func,
duk_realloc_function realloc_func,
duk_free_function free_func,
void *heap_udata,
duk_fatal_function fatal_func) {
duk_heap *res = NULL;
/* Silence a few global unused warnings here. */
DUK_UNREF(duk_str_unsupported);
DUK_D(DUK_DPRINT("allocate heap"));
/*
* Debug dump type sizes
*/
#if defined(DUK_USE_DEBUG)
duk__dump_misc_options();
duk__dump_type_sizes();
duk__dump_type_limits();
#endif
/*
* If selftests enabled, run them as early as possible
*/
#if defined(DUK_USE_SELF_TESTS)
DUK_D(DUK_DPRINT("running self tests"));
duk_selftest_run_tests();
DUK_D(DUK_DPRINT("self tests passed"));
#endif
/*
* Computed values (e.g. INFINITY)
*/
#if defined(DUK_USE_COMPUTED_NAN)
do {
/* Workaround for some exotic platforms where NAN is missing
* and the expression (0.0 / 0.0) does NOT result in a NaN.
* Such platforms use the global 'duk_computed_nan' which must
* be initialized at runtime. Use 'volatile' to ensure that
* the compiler will actually do the computation and not try
* to do constant folding which might result in the original
* problem.
*/
volatile double dbl1 = 0.0;
volatile double dbl2 = 0.0;
duk_computed_nan = dbl1 / dbl2;
} while (0);
#endif
#if defined(DUK_USE_COMPUTED_INFINITY)
do {
/* Similar workaround for INFINITY. */
volatile double dbl1 = 1.0;
volatile double dbl2 = 0.0;
duk_computed_infinity = dbl1 / dbl2;
} while (0);
#endif
/*
* Allocate heap struct
*
* Use a raw call, all macros expect the heap to be initialized
*/
res = (duk_heap *) alloc_func(heap_udata, sizeof(duk_heap));
if (!res) {
goto error;
}
/*
* Zero the struct, and start initializing roughly in order
*/
DUK_MEMZERO(res, sizeof(*res));
/* explicit NULL inits */
#if defined(DUK_USE_EXPLICIT_NULL_INIT)
res->heap_udata = NULL;
res->heap_allocated = NULL;
#if defined(DUK_USE_REFERENCE_COUNTING)
res->refzero_list = NULL;
res->refzero_list_tail = NULL;
#endif
#if defined(DUK_USE_MARK_AND_SWEEP)
res->finalize_list = NULL;
#endif
res->heap_thread = NULL;
res->curr_thread = NULL;
res->heap_object = NULL;
#if defined(DUK_USE_STRTAB_CHAIN)
/* nothing to NULL */
#elif defined(DUK_USE_STRTAB_PROBE)
#if defined(DUK_USE_HEAPPTR16)
res->strtable16 = (duk_uint16_t *) NULL;
#else
res->strtable = (duk_hstring **) NULL;
#endif
#endif
#if defined(DUK_USE_ROM_STRINGS)
/* no res->strs[] */
#else /* DUK_USE_ROM_STRINGS */
#if defined(DUK_USE_HEAPPTR16)
/* res->strs16[] is zeroed and zero decodes to NULL, so no NULL inits. */
#else
{
duk_small_uint_t i;
for (i = 0; i < DUK_HEAP_NUM_STRINGS; i++) {
res->strs[i] = NULL;
}
}
#endif
#endif /* DUK_USE_ROM_STRINGS */
#if defined(DUK_USE_DEBUGGER_SUPPORT)
res->dbg_read_cb = NULL;
res->dbg_write_cb = NULL;
res->dbg_peek_cb = NULL;
res->dbg_read_flush_cb = NULL;
res->dbg_write_flush_cb = NULL;
res->dbg_request_cb = NULL;
res->dbg_udata = NULL;
res->dbg_step_thread = NULL;
#endif
#endif /* DUK_USE_EXPLICIT_NULL_INIT */
res->alloc_func = alloc_func;
res->realloc_func = realloc_func;
res->free_func = free_func;
res->heap_udata = heap_udata;
res->fatal_func = fatal_func;
#if defined(DUK_USE_HEAPPTR16)
/* XXX: zero assumption */
res->heapptr_null16 = DUK_USE_HEAPPTR_ENC16(res->heap_udata, (void *) NULL);
res->heapptr_deleted16 = DUK_USE_HEAPPTR_ENC16(res->heap_udata, (void *) DUK_STRTAB_DELETED_MARKER(res));
#endif
/* res->mark_and_sweep_trigger_counter == 0 -> now causes immediate GC; which is OK */
res->call_recursion_depth = 0;
res->call_recursion_limit = DUK_USE_NATIVE_CALL_RECLIMIT;
/* XXX: use the pointer as a seed for now: mix in time at least */
/* The casts through duk_intr_pt is to avoid the following GCC warning:
*
* warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
*
* This still generates a /Wp64 warning on VS2010 when compiling for x86.
*/
#if defined(DUK_USE_ROM_STRINGS)
/* XXX: make a common DUK_USE_ option, and allow custom fixed seed? */
DUK_D(DUK_DPRINT("using rom strings, force heap hash_seed to fixed value 0x%08lx", (long) DUK__FIXED_HASH_SEED));
res->hash_seed = (duk_uint32_t) DUK__FIXED_HASH_SEED;
#else /* DUK_USE_ROM_STRINGS */
res->hash_seed = (duk_uint32_t) (duk_intptr_t) res;
res->rnd_state = (duk_uint32_t) (duk_intptr_t) res;
#if !defined(DUK_USE_STRHASH_DENSE)
res->hash_seed ^= 5381; /* Bernstein hash init value is normally 5381; XOR it in in case pointer low bits are 0 */
#endif
#endif /* DUK_USE_ROM_STRINGS */
#if defined(DUK_USE_EXPLICIT_NULL_INIT)
res->lj.jmpbuf_ptr = NULL;
#endif
DUK_ASSERT(res->lj.type == DUK_LJ_TYPE_UNKNOWN); /* zero */
DUK_TVAL_SET_UNDEFINED(&res->lj.value1);
DUK_TVAL_SET_UNDEFINED(&res->lj.value2);
#if (DUK_STRTAB_INITIAL_SIZE < DUK_UTIL_MIN_HASH_PRIME)
#error initial heap stringtable size is defined incorrectly
#endif
/*
* Init stringtable: fixed variant
*/
#if defined(DUK_USE_STRTAB_CHAIN)
DUK_MEMZERO(res->strtable, sizeof(duk_strtab_entry) * DUK_STRTAB_CHAIN_SIZE);
#if defined(DUK_USE_EXPLICIT_NULL_INIT)
{
duk_small_uint_t i;
for (i = 0; i < DUK_STRTAB_CHAIN_SIZE; i++) {
#if defined(DUK_USE_HEAPPTR16)
res->strtable[i].u.str16 = res->heapptr_null16;
#else
res->strtable[i].u.str = NULL;
#endif
}
}
#endif /* DUK_USE_EXPLICIT_NULL_INIT */
#endif /* DUK_USE_STRTAB_CHAIN */
/*
* Init stringtable: probe variant
*/
#if defined(DUK_USE_STRTAB_PROBE)
#if defined(DUK_USE_HEAPPTR16)
res->strtable16 = (duk_uint16_t *) alloc_func(heap_udata, sizeof(duk_uint16_t) * DUK_STRTAB_INITIAL_SIZE);
if (!res->strtable16) {
goto error;
}
#else /* DUK_USE_HEAPPTR16 */
res->strtable = (duk_hstring **) alloc_func(heap_udata, sizeof(duk_hstring *) * DUK_STRTAB_INITIAL_SIZE);
if (!res->strtable) {
goto error;
}
#endif /* DUK_USE_HEAPPTR16 */
res->st_size = DUK_STRTAB_INITIAL_SIZE;
#if defined(DUK_USE_EXPLICIT_NULL_INIT)
{
duk_small_uint_t i;
DUK_ASSERT(res->st_size == DUK_STRTAB_INITIAL_SIZE);
for (i = 0; i < DUK_STRTAB_INITIAL_SIZE; i++) {
#if defined(DUK_USE_HEAPPTR16)
res->strtable16[i] = res->heapptr_null16;
#else
res->strtable[i] = NULL;
#endif
}
}
#else /* DUK_USE_EXPLICIT_NULL_INIT */
#if defined(DUK_USE_HEAPPTR16)
DUK_MEMZERO(res->strtable16, sizeof(duk_uint16_t) * DUK_STRTAB_INITIAL_SIZE);
#else
DUK_MEMZERO(res->strtable, sizeof(duk_hstring *) * DUK_STRTAB_INITIAL_SIZE);
#endif
#endif /* DUK_USE_EXPLICIT_NULL_INIT */
#endif /* DUK_USE_STRTAB_PROBE */
/*
* Init stringcache
*/
#if defined(DUK_USE_EXPLICIT_NULL_INIT)
{
duk_small_uint_t i;
for (i = 0; i < DUK_HEAP_STRCACHE_SIZE; i++) {
res->strcache[i].h = NULL;
}
}
#endif
/* XXX: error handling is incomplete. It would be cleanest if
* there was a setjmp catchpoint, so that all init code could
* freely throw errors. If that were the case, the return code
* passing here could be removed.
*/
/*
* Init built-in strings
*/
DUK_DD(DUK_DDPRINT("HEAP: INIT STRINGS"));
if (!duk__init_heap_strings(res)) {
goto error;
}
/*
* Init the heap thread
*/
DUK_DD(DUK_DDPRINT("HEAP: INIT HEAP THREAD"));
if (!duk__init_heap_thread(res)) {
goto error;
}
/*
* Init the heap object
*/
DUK_DD(DUK_DDPRINT("HEAP: INIT HEAP OBJECT"));
DUK_ASSERT(res->heap_thread != NULL);
res->heap_object = duk_hobject_alloc(res, DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT));
if (!res->heap_object) {
goto error;
}
DUK_HOBJECT_INCREF(res->heap_thread, res->heap_object);
/*
* All done
*/
DUK_D(DUK_DPRINT("allocated heap: %p", (void *) res));
return res;
error:
DUK_D(DUK_DPRINT("heap allocation failed"));
if (res) {
/* assumes that allocated pointers and alloc funcs are valid
* if res exists
*/
DUK_ASSERT(res->alloc_func != NULL);
DUK_ASSERT(res->realloc_func != NULL);
DUK_ASSERT(res->free_func != NULL);
duk_heap_free(res);
}
return NULL;
}
#undef DUK__BITPACK_LETTER_LIMIT
#undef DUK__BITPACK_UNDERSCORE
#undef DUK__BITPACK_FF
#undef DUK__BITPACK_SWITCH1
#undef DUK__BITPACK_SWITCH
#undef DUK__BITPACK_SEVENBIT
#undef DUK__FIXED_HASH_SEED
#line 1 "duk_heap_hashstring.c"
/*
* String hash computation (interning).
*
* String hashing is performance critical because a string hash is computed
* for all new strings which are candidates to be added to the string table.
* However, strings actually added to the string table go through a codepoint
* length calculation which dominates performance because it goes through
* every byte of the input string (but only for strings added).
*
* The string hash algorithm should be fast, but on the other hand provide
* good enough hashes to ensure both string table and object property table
* hash tables work reasonably well (i.e., there aren't too many collisions
* with real world inputs). Unless the hash is cryptographic, it's always
* possible to craft inputs with maximal hash collisions.
*
* NOTE: The hash algorithms must match src/dukutil.py:duk_heap_hashstring()
* for ROM string support!
*/
/* include removed: duk_internal.h */
#if defined(DUK_USE_STRHASH_DENSE)
/* Constants for duk_hashstring(). */
#define DUK__STRHASH_SHORTSTRING 4096L
#define DUK__STRHASH_MEDIUMSTRING (256L * 1024L)
#define DUK__STRHASH_BLOCKSIZE 256L
DUK_INTERNAL duk_uint32_t duk_heap_hashstring(duk_heap *heap, const duk_uint8_t *str, duk_size_t len) {
duk_uint32_t hash;
/* Use Murmurhash2 directly for short strings, and use "block skipping"
* for long strings: hash an initial part and then sample the rest of
* the string with reasonably sized chunks. An initial offset for the
* sampling is computed based on a hash of the initial part of the string;
* this is done to (usually) avoid the case where all long strings have
* certain offset ranges which are never sampled.
*
* Skip should depend on length and bound the total time to roughly
* logarithmic. With current values:
*
* 1M string => 256 * 241 = 61696 bytes (0.06M) of hashing
* 1G string => 256 * 16321 = 4178176 bytes (3.98M) of hashing
*
* XXX: It would be better to compute the skip offset more "smoothly"
* instead of having a few boundary values.
*/
/* note: mixing len into seed improves hashing when skipping */
duk_uint32_t str_seed = heap->hash_seed ^ ((duk_uint32_t) len);
if (len <= DUK__STRHASH_SHORTSTRING) {
hash = duk_util_hashbytes(str, len, str_seed);
} else {
duk_size_t off;
duk_size_t skip;
if (len <= DUK__STRHASH_MEDIUMSTRING) {
skip = (duk_size_t) (16 * DUK__STRHASH_BLOCKSIZE + DUK__STRHASH_BLOCKSIZE);
} else {
skip = (duk_size_t) (256 * DUK__STRHASH_BLOCKSIZE + DUK__STRHASH_BLOCKSIZE);
}
hash = duk_util_hashbytes(str, (duk_size_t) DUK__STRHASH_SHORTSTRING, str_seed);
off = DUK__STRHASH_SHORTSTRING + (skip * (hash % 256)) / 256;
/* XXX: inefficient loop */
while (off < len) {
duk_size_t left = len - off;
duk_size_t now = (duk_size_t) (left > DUK__STRHASH_BLOCKSIZE ? DUK__STRHASH_BLOCKSIZE : left);
hash ^= duk_util_hashbytes(str + off, now, str_seed);
off += skip;
}
}
#if defined(DUK_USE_STRHASH16)
/* Truncate to 16 bits here, so that a computed hash can be compared
* against a hash stored in a 16-bit field.
*/
hash &= 0x0000ffffUL;
#endif
return hash;
}
#undef DUK__STRHASH_SHORTSTRING
#undef DUK__STRHASH_MEDIUMSTRING
#undef DUK__STRHASH_BLOCKSIZE
#else /* DUK_USE_STRHASH_DENSE */
DUK_INTERNAL duk_uint32_t duk_heap_hashstring(duk_heap *heap, const duk_uint8_t *str, duk_size_t len) {
duk_uint32_t hash;
duk_size_t step;
duk_size_t off;
/* Slightly modified "Bernstein hash" from:
*
* http://eternallyconfuzzled.com/tuts/algorithms/jsw_tut_hashing.aspx
*
* Modifications: string skipping and reverse direction similar to
* Lua 5.1.5, and different hash initializer.
*
* The reverse direction ensures last byte it always included in the
* hash which is a good default as changing parts of the string are
* more often in the suffix than in the prefix.
*/
hash = heap->hash_seed ^ ((duk_uint32_t) len); /* Bernstein hash init value is normally 5381 */
step = (len >> DUK_USE_STRHASH_SKIP_SHIFT) + 1;
for (off = len; off >= step; off -= step) {
DUK_ASSERT(off >= 1); /* off >= step, and step >= 1 */
hash = (hash * 33) + str[off - 1];
}
#if defined(DUK_USE_STRHASH16)
/* Truncate to 16 bits here, so that a computed hash can be compared
* against a hash stored in a 16-bit field.
*/
hash &= 0x0000ffffUL;
#endif
return hash;
}
#endif /* DUK_USE_STRHASH_DENSE */
#line 1 "duk_heap_markandsweep.c"
/*
* Mark-and-sweep garbage collection.
*/
/* include removed: duk_internal.h */
#ifdef DUK_USE_MARK_AND_SWEEP
DUK_LOCAL_DECL void duk__mark_heaphdr(duk_heap *heap, duk_heaphdr *h);
DUK_LOCAL_DECL void duk__mark_tval(duk_heap *heap, duk_tval *tv);
/*
* Misc
*/
/* Select a thread for mark-and-sweep use.
*
* XXX: This needs to change later.
*/
DUK_LOCAL duk_hthread *duk__get_temp_hthread(duk_heap *heap) {
if (heap->curr_thread) {
return heap->curr_thread;
}
return heap->heap_thread; /* may be NULL, too */
}
/*
* Marking functions for heap types: mark children recursively
*/
DUK_LOCAL void duk__mark_hstring(duk_heap *heap, duk_hstring *h) {
DUK_UNREF(heap);
DUK_UNREF(h);
DUK_DDD(DUK_DDDPRINT("duk__mark_hstring: %p", (void *) h));
DUK_ASSERT(h);
/* nothing to process */
}
DUK_LOCAL void duk__mark_hobject(duk_heap *heap, duk_hobject *h) {
duk_uint_fast32_t i;
DUK_DDD(DUK_DDDPRINT("duk__mark_hobject: %p", (void *) h));
DUK_ASSERT(h);
/* XXX: use advancing pointers instead of index macros -> faster and smaller? */
for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(h); i++) {
duk_hstring *key = DUK_HOBJECT_E_GET_KEY(heap, h, i);
if (!key) {
continue;
}
duk__mark_heaphdr(heap, (duk_heaphdr *) key);
if (DUK_HOBJECT_E_SLOT_IS_ACCESSOR(heap, h, i)) {
duk__mark_heaphdr(heap, (duk_heaphdr *) DUK_HOBJECT_E_GET_VALUE_PTR(heap, h, i)->a.get);
duk__mark_heaphdr(heap, (duk_heaphdr *) DUK_HOBJECT_E_GET_VALUE_PTR(heap, h, i)->a.set);
} else {
duk__mark_tval(heap, &DUK_HOBJECT_E_GET_VALUE_PTR(heap, h, i)->v);
}
}
for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ASIZE(h); i++) {
duk__mark_tval(heap, DUK_HOBJECT_A_GET_VALUE_PTR(heap, h, i));
}
/* hash part is a 'weak reference' and does not contribute */
duk__mark_heaphdr(heap, (duk_heaphdr *) DUK_HOBJECT_GET_PROTOTYPE(heap, h));
if (DUK_HOBJECT_IS_COMPILEDFUNCTION(h)) {
duk_hcompiledfunction *f = (duk_hcompiledfunction *) h;
duk_tval *tv, *tv_end;
duk_hobject **fn, **fn_end;
/* 'data' is reachable through every compiled function which
* contains a reference.
*/
duk__mark_heaphdr(heap, (duk_heaphdr *) DUK_HCOMPILEDFUNCTION_GET_DATA(heap, f));
tv = DUK_HCOMPILEDFUNCTION_GET_CONSTS_BASE(heap, f);
tv_end = DUK_HCOMPILEDFUNCTION_GET_CONSTS_END(heap, f);
while (tv < tv_end) {
duk__mark_tval(heap, tv);
tv++;
}
fn = DUK_HCOMPILEDFUNCTION_GET_FUNCS_BASE(heap, f);
fn_end = DUK_HCOMPILEDFUNCTION_GET_FUNCS_END(heap, f);
while (fn < fn_end) {
duk__mark_heaphdr(heap, (duk_heaphdr *) *fn);
fn++;
}
} else if (DUK_HOBJECT_IS_NATIVEFUNCTION(h)) {
duk_hnativefunction *f = (duk_hnativefunction *) h;
DUK_UNREF(f);
/* nothing to mark */
} else if (DUK_HOBJECT_IS_BUFFEROBJECT(h)) {
duk_hbufferobject *b = (duk_hbufferobject *) h;
duk__mark_heaphdr(heap, (duk_heaphdr *) b->buf);
} else if (DUK_HOBJECT_IS_THREAD(h)) {
duk_hthread *t = (duk_hthread *) h;
duk_tval *tv;
tv = t->valstack;
while (tv < t->valstack_top) {
duk__mark_tval(heap, tv);
tv++;
}
for (i = 0; i < (duk_uint_fast32_t) t->callstack_top; i++) {
duk_activation *act = t->callstack + i;
duk__mark_heaphdr(heap, (duk_heaphdr *) DUK_ACT_GET_FUNC(act));
duk__mark_heaphdr(heap, (duk_heaphdr *) act->var_env);
duk__mark_heaphdr(heap, (duk_heaphdr *) act->lex_env);
#ifdef DUK_USE_NONSTD_FUNC_CALLER_PROPERTY
duk__mark_heaphdr(heap, (duk_heaphdr *) act->prev_caller);
#endif
}
#if 0 /* nothing now */
for (i = 0; i < (duk_uint_fast32_t) t->catchstack_top; i++) {
duk_catcher *cat = t->catchstack + i;
}
#endif
duk__mark_heaphdr(heap, (duk_heaphdr *) t->resumer);
/* XXX: duk_small_uint_t would be enough for this loop */
for (i = 0; i < DUK_NUM_BUILTINS; i++) {
duk__mark_heaphdr(heap, (duk_heaphdr *) t->builtins[i]);
}
}
}
/* recursion tracking happens here only */
DUK_LOCAL void duk__mark_heaphdr(duk_heap *heap, duk_heaphdr *h) {
DUK_DDD(DUK_DDDPRINT("duk__mark_heaphdr %p, type %ld",
(void *) h,
(h != NULL ? (long) DUK_HEAPHDR_GET_TYPE(h) : (long) -1)));
if (!h) {
return;
}
#if defined(DUK_USE_ROM_OBJECTS)
if (DUK_HEAPHDR_HAS_READONLY(h)) {
DUK_DDD(DUK_DDDPRINT("readonly object %p, skip", (void *) h));
return;
}
#endif
if (DUK_HEAPHDR_HAS_REACHABLE(h)) {
DUK_DDD(DUK_DDDPRINT("already marked reachable, skip"));
return;
}
DUK_HEAPHDR_SET_REACHABLE(h);
if (heap->mark_and_sweep_recursion_depth >= DUK_USE_MARK_AND_SWEEP_RECLIMIT) {
/* log this with a normal debug level because this should be relatively rare */
DUK_D(DUK_DPRINT("mark-and-sweep recursion limit reached, marking as temproot: %p", (void *) h));
DUK_HEAP_SET_MARKANDSWEEP_RECLIMIT_REACHED(heap);
DUK_HEAPHDR_SET_TEMPROOT(h);
return;
}
heap->mark_and_sweep_recursion_depth++;
switch ((int) DUK_HEAPHDR_GET_TYPE(h)) {
case DUK_HTYPE_STRING:
duk__mark_hstring(heap, (duk_hstring *) h);
break;
case DUK_HTYPE_OBJECT:
duk__mark_hobject(heap, (duk_hobject *) h);
break;
case DUK_HTYPE_BUFFER:
/* nothing to mark */
break;
default:
DUK_D(DUK_DPRINT("attempt to mark heaphdr %p with invalid htype %ld", (void *) h, (long) DUK_HEAPHDR_GET_TYPE(h)));
DUK_UNREACHABLE();
}
heap->mark_and_sweep_recursion_depth--;
}
DUK_LOCAL void duk__mark_tval(duk_heap *heap, duk_tval *tv) {
DUK_DDD(DUK_DDDPRINT("duk__mark_tval %p", (void *) tv));
if (!tv) {
return;
}
if (DUK_TVAL_IS_HEAP_ALLOCATED(tv)) {
duk__mark_heaphdr(heap, DUK_TVAL_GET_HEAPHDR(tv));
}
}
/*
* Mark the heap.
*/
DUK_LOCAL void duk__mark_roots_heap(duk_heap *heap) {
duk_small_uint_t i;
DUK_DD(DUK_DDPRINT("duk__mark_roots_heap: %p", (void *) heap));
duk__mark_heaphdr(heap, (duk_heaphdr *) heap->heap_thread);
duk__mark_heaphdr(heap, (duk_heaphdr *) heap->heap_object);
for (i = 0; i < DUK_HEAP_NUM_STRINGS; i++) {
duk_hstring *h = DUK_HEAP_GET_STRING(heap, i);
duk__mark_heaphdr(heap, (duk_heaphdr *) h);
}
duk__mark_tval(heap, &heap->lj.value1);
duk__mark_tval(heap, &heap->lj.value2);
#if defined(DUK_USE_DEBUGGER_SUPPORT)
for (i = 0; i < heap->dbg_breakpoint_count; i++) {
duk__mark_heaphdr(heap, (duk_heaphdr *) heap->dbg_breakpoints[i].filename);
}
#endif
}
/*
* Mark refzero_list objects.
*
* Objects on the refzero_list have no inbound references. They might have
* outbound references to objects that we might free, which would invalidate
* any references held by the refzero objects. A refzero object might also
* be rescued by refcount finalization. Refzero objects are treated as
* reachability roots to ensure they (or anything they point to) are not
* freed in mark-and-sweep.
*/
#ifdef DUK_USE_REFERENCE_COUNTING
DUK_LOCAL void duk__mark_refzero_list(duk_heap *heap) {
duk_heaphdr *hdr;
DUK_DD(DUK_DDPRINT("duk__mark_refzero_list: %p", (void *) heap));
hdr = heap->refzero_list;
while (hdr) {
duk__mark_heaphdr(heap, hdr);
hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr);
}
}
#endif
/*
* Mark unreachable, finalizable objects.
*
* Such objects will be moved aside and their finalizers run later. They have
* to be treated as reachability roots for their properties etc to remain
* allocated. This marking is only done for unreachable values which would
* be swept later (refzero_list is thus excluded).
*
* Objects are first marked FINALIZABLE and only then marked as reachability
* roots; otherwise circular references might be handled inconsistently.
*/
DUK_LOCAL void duk__mark_finalizable(duk_heap *heap) {
duk_hthread *thr;
duk_heaphdr *hdr;
duk_size_t count_finalizable = 0;
DUK_DD(DUK_DDPRINT("duk__mark_finalizable: %p", (void *) heap));
thr = duk__get_temp_hthread(heap);
DUK_ASSERT(thr != NULL);
hdr = heap->heap_allocated;
while (hdr) {
/* A finalizer is looked up from the object and up its prototype chain
* (which allows inherited finalizers). A prototype loop must not cause
* an error to be thrown here; duk_hobject_hasprop_raw() will ignore a
* prototype loop silently and indicate that the property doesn't exist.
*/
if (!DUK_HEAPHDR_HAS_REACHABLE(hdr) &&
DUK_HEAPHDR_GET_TYPE(hdr) == DUK_HTYPE_OBJECT &&
!DUK_HEAPHDR_HAS_FINALIZED(hdr) &&
duk_hobject_hasprop_raw(thr, (duk_hobject *) hdr, DUK_HTHREAD_STRING_INT_FINALIZER(thr))) {
/* heaphdr:
* - is not reachable
* - is an object
* - is not a finalized object
* - has a finalizer
*/
DUK_DD(DUK_DDPRINT("unreachable heap object will be "
"finalized -> mark as finalizable "
"and treat as a reachability root: %p",
(void *) hdr));
DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY(hdr));
DUK_HEAPHDR_SET_FINALIZABLE(hdr);
count_finalizable ++;
}
hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr);
}
if (count_finalizable == 0) {
return;
}
DUK_DD(DUK_DDPRINT("marked %ld heap objects as finalizable, now mark them reachable",
(long) count_finalizable));
hdr = heap->heap_allocated;
while (hdr) {
if (DUK_HEAPHDR_HAS_FINALIZABLE(hdr)) {
duk__mark_heaphdr(heap, hdr);
}
hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr);
}
/* Caller will finish the marking process if we hit a recursion limit. */
}
/*
* Mark objects on finalize_list.
*
*/
DUK_LOCAL void duk__mark_finalize_list(duk_heap *heap) {
duk_heaphdr *hdr;
#ifdef DUK_USE_DEBUG
duk_size_t count_finalize_list = 0;
#endif
DUK_DD(DUK_DDPRINT("duk__mark_finalize_list: %p", (void *) heap));
hdr = heap->finalize_list;
while (hdr) {
duk__mark_heaphdr(heap, hdr);
hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr);
#ifdef DUK_USE_DEBUG
count_finalize_list++;
#endif
}
#ifdef DUK_USE_DEBUG
if (count_finalize_list > 0) {
DUK_D(DUK_DPRINT("marked %ld objects on the finalize_list as reachable (previous finalizer run skipped)",
(long) count_finalize_list));
}
#endif
}
/*
* Fallback marking handler if recursion limit is reached.
*
* Iterates 'temproots' until recursion limit is no longer hit. Note
* that temproots may reside either in heap allocated list or the
* refzero work list. This is a slow scan, but guarantees that we
* finish with a bounded C stack.
*
* Note that nodes may have been marked as temproots before this
* scan begun, OR they may have been marked during the scan (as
* we process nodes recursively also during the scan). This is
* intended behavior.
*/
#ifdef DUK_USE_DEBUG
DUK_LOCAL void duk__handle_temproot(duk_heap *heap, duk_heaphdr *hdr, duk_size_t *count) {
#else
DUK_LOCAL void duk__handle_temproot(duk_heap *heap, duk_heaphdr *hdr) {
#endif
if (!DUK_HEAPHDR_HAS_TEMPROOT(hdr)) {
DUK_DDD(DUK_DDDPRINT("not a temp root: %p", (void *) hdr));
return;
}
DUK_DDD(DUK_DDDPRINT("found a temp root: %p", (void *) hdr));
DUK_HEAPHDR_CLEAR_TEMPROOT(hdr);
DUK_HEAPHDR_CLEAR_REACHABLE(hdr); /* done so that duk__mark_heaphdr() works correctly */
duk__mark_heaphdr(heap, hdr);
#ifdef DUK_USE_DEBUG
(*count)++;
#endif
}
DUK_LOCAL void duk__mark_temproots_by_heap_scan(duk_heap *heap) {
duk_heaphdr *hdr;
#ifdef DUK_USE_DEBUG
duk_size_t count;
#endif
DUK_DD(DUK_DDPRINT("duk__mark_temproots_by_heap_scan: %p", (void *) heap));
while (DUK_HEAP_HAS_MARKANDSWEEP_RECLIMIT_REACHED(heap)) {
DUK_DD(DUK_DDPRINT("recursion limit reached, doing heap scan to continue from temproots"));
#ifdef DUK_USE_DEBUG
count = 0;
#endif
DUK_HEAP_CLEAR_MARKANDSWEEP_RECLIMIT_REACHED(heap);
hdr = heap->heap_allocated;
while (hdr) {
#ifdef DUK_USE_DEBUG
duk__handle_temproot(heap, hdr, &count);
#else
duk__handle_temproot(heap, hdr);
#endif
hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr);
}
/* must also check refzero_list */
#ifdef DUK_USE_REFERENCE_COUNTING
hdr = heap->refzero_list;
while (hdr) {
#ifdef DUK_USE_DEBUG
duk__handle_temproot(heap, hdr, &count);
#else
duk__handle_temproot(heap, hdr);
#endif
hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr);
}
#endif /* DUK_USE_REFERENCE_COUNTING */
#ifdef DUK_USE_DEBUG
DUK_DD(DUK_DDPRINT("temproot mark heap scan processed %ld temp roots", (long) count));
#endif
}
}
/*
* Finalize refcounts for heap elements just about to be freed.
* This must be done for all objects before freeing to avoid any
* stale pointer dereferences.
*
* Note that this must deduce the set of objects to be freed
* identically to duk__sweep_heap().
*/
#ifdef DUK_USE_REFERENCE_COUNTING
DUK_LOCAL void duk__finalize_refcounts(duk_heap *heap) {
duk_hthread *thr;
duk_heaphdr *hdr;
thr = duk__get_temp_hthread(heap);
DUK_ASSERT(thr != NULL);
DUK_DD(DUK_DDPRINT("duk__finalize_refcounts: heap=%p, hthread=%p",
(void *) heap, (void *) thr));
hdr = heap->heap_allocated;
while (hdr) {
if (!DUK_HEAPHDR_HAS_REACHABLE(hdr)) {
/*
* Unreachable object about to be swept. Finalize target refcounts
* (objects which the unreachable object points to) without doing
* refzero processing. Recursive decrefs are also prevented when
* refzero processing is disabled.
*
* Value cannot be a finalizable object, as they have been made
* temporarily reachable for this round.
*/
DUK_DDD(DUK_DDDPRINT("unreachable object, refcount finalize before sweeping: %p", (void *) hdr));
duk_heaphdr_refcount_finalize(thr, hdr);
}
hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr);
}
}
#endif /* DUK_USE_REFERENCE_COUNTING */
/*
* Clear (reachable) flags of refzero work list.
*/
#ifdef DUK_USE_REFERENCE_COUNTING
DUK_LOCAL void duk__clear_refzero_list_flags(duk_heap *heap) {
duk_heaphdr *hdr;
DUK_DD(DUK_DDPRINT("duk__clear_refzero_list_flags: %p", (void *) heap));
hdr = heap->refzero_list;
while (hdr) {
DUK_HEAPHDR_CLEAR_REACHABLE(hdr);
DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZABLE(hdr));
DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZED(hdr));
DUK_ASSERT(!DUK_HEAPHDR_HAS_TEMPROOT(hdr));
hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr);
}
}
#endif /* DUK_USE_REFERENCE_COUNTING */
/*
* Clear (reachable) flags of finalize_list
*
* We could mostly do in the sweep phase when we move objects from the
* heap into the finalize_list. However, if a finalizer run is skipped
* during a mark-and-sweep, the objects on the finalize_list will be marked
* reachable during the next mark-and-sweep. Since they're already on the
* finalize_list, no-one will be clearing their REACHABLE flag so we do it
* here. (This now overlaps with the sweep handling in a harmless way.)
*/
DUK_LOCAL void duk__clear_finalize_list_flags(duk_heap *heap) {
duk_heaphdr *hdr;
DUK_DD(DUK_DDPRINT("duk__clear_finalize_list_flags: %p", (void *) heap));
hdr = heap->finalize_list;
while (hdr) {
DUK_HEAPHDR_CLEAR_REACHABLE(hdr);
DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZABLE(hdr));
DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZED(hdr));
DUK_ASSERT(!DUK_HEAPHDR_HAS_TEMPROOT(hdr));
hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr);
}
}
/*
* Sweep stringtable
*/
#if defined(DUK_USE_STRTAB_CHAIN)
/* XXX: skip count_free w/o debug? */
#if defined(DUK_USE_HEAPPTR16)
DUK_LOCAL void duk__sweep_string_chain16(duk_heap *heap, duk_uint16_t *slot, duk_size_t *count_keep, duk_size_t *count_free) {
duk_uint16_t h16 = *slot;
duk_hstring *h;
duk_uint16_t null16 = heap->heapptr_null16;
if (h16 == null16) {
/* nop */
return;
}
h = (duk_hstring *) DUK_USE_HEAPPTR_DEC16(heap->heap_udata, h16);
DUK_ASSERT(h != NULL);
if (DUK_HEAPHDR_HAS_REACHABLE((duk_heaphdr *) h)) {
DUK_HEAPHDR_CLEAR_REACHABLE((duk_heaphdr *) h);
(*count_keep)++;
} else {
#if defined(DUK_USE_REFERENCE_COUNTING)
DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) h) == 0);
#endif
/* deal with weak references first */
duk_heap_strcache_string_remove(heap, (duk_hstring *) h);
*slot = null16;
/* free inner references (these exist e.g. when external
* strings are enabled)
*/
duk_free_hstring_inner(heap, h);
DUK_FREE(heap, h);
(*count_free)++;
}
}
#else /* DUK_USE_HEAPPTR16 */
DUK_LOCAL void duk__sweep_string_chain(duk_heap *heap, duk_hstring **slot, duk_size_t *count_keep, duk_size_t *count_free) {
duk_hstring *h = *slot;
if (h == NULL) {
/* nop */
return;
}
if (DUK_HEAPHDR_HAS_REACHABLE((duk_heaphdr *) h)) {
DUK_HEAPHDR_CLEAR_REACHABLE((duk_heaphdr *) h);
(*count_keep)++;
} else {
#if defined(DUK_USE_REFERENCE_COUNTING)
DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) h) == 0);
#endif
/* deal with weak references first */
duk_heap_strcache_string_remove(heap, (duk_hstring *) h);
*slot = NULL;
/* free inner references (these exist e.g. when external
* strings are enabled)
*/
duk_free_hstring_inner(heap, h);
DUK_FREE(heap, h);
(*count_free)++;
}
}
#endif /* DUK_USE_HEAPPTR16 */
DUK_LOCAL void duk__sweep_stringtable_chain(duk_heap *heap, duk_size_t *out_count_keep) {
duk_strtab_entry *e;
duk_uint_fast32_t i;
duk_size_t count_free = 0;
duk_size_t count_keep = 0;
duk_size_t j, n;
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t *lst;
#else
duk_hstring **lst;
#endif
DUK_DD(DUK_DDPRINT("duk__sweep_stringtable: %p", (void *) heap));
/* Non-zero refcounts should not happen for unreachable strings,
* because we refcount finalize all unreachable objects which
* should have decreased unreachable string refcounts to zero
* (even for cycles).
*/
for (i = 0; i < DUK_STRTAB_CHAIN_SIZE; i++) {
e = heap->strtable + i;
if (e->listlen == 0) {
#if defined(DUK_USE_HEAPPTR16)
duk__sweep_string_chain16(heap, &e->u.str16, &count_keep, &count_free);
#else
duk__sweep_string_chain(heap, &e->u.str, &count_keep, &count_free);
#endif
} else {
#if defined(DUK_USE_HEAPPTR16)
lst = (duk_uint16_t *) DUK_USE_HEAPPTR_DEC16(heap->heap_udata, e->u.strlist16);
#else
lst = e->u.strlist;
#endif
for (j = 0, n = e->listlen; j < n; j++) {
#if defined(DUK_USE_HEAPPTR16)
duk__sweep_string_chain16(heap, lst + j, &count_keep, &count_free);
#else
duk__sweep_string_chain(heap, lst + j, &count_keep, &count_free);
#endif
}
}
}
DUK_D(DUK_DPRINT("mark-and-sweep sweep stringtable: %ld freed, %ld kept",
(long) count_free, (long) count_keep));
*out_count_keep = count_keep;
}
#endif /* DUK_USE_STRTAB_CHAIN */
#if defined(DUK_USE_STRTAB_PROBE)
DUK_LOCAL void duk__sweep_stringtable_probe(duk_heap *heap, duk_size_t *out_count_keep) {
duk_hstring *h;
duk_uint_fast32_t i;
#ifdef DUK_USE_DEBUG
duk_size_t count_free = 0;
#endif
duk_size_t count_keep = 0;
DUK_DD(DUK_DDPRINT("duk__sweep_stringtable: %p", (void *) heap));
for (i = 0; i < heap->st_size; i++) {
#if defined(DUK_USE_HEAPPTR16)
h = (duk_hstring *) DUK_USE_HEAPPTR_DEC16(heap->heap_udata, heap->strtable16[i]);
#else
h = heap->strtable[i];
#endif
if (h == NULL || h == DUK_STRTAB_DELETED_MARKER(heap)) {
continue;
} else if (DUK_HEAPHDR_HAS_REACHABLE((duk_heaphdr *) h)) {
DUK_HEAPHDR_CLEAR_REACHABLE((duk_heaphdr *) h);
count_keep++;
continue;
}
#ifdef DUK_USE_DEBUG
count_free++;
#endif
#if defined(DUK_USE_REFERENCE_COUNTING)
/* Non-zero refcounts should not happen for unreachable strings,
* because we refcount finalize all unreachable objects which
* should have decreased unreachable string refcounts to zero
* (even for cycles).
*/
DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) h) == 0);
#endif
DUK_DDD(DUK_DDDPRINT("sweep string, not reachable: %p", (void *) h));
/* deal with weak references first */
duk_heap_strcache_string_remove(heap, (duk_hstring *) h);
/* remove the string (mark DELETED), could also call
* duk_heap_string_remove() but that would be slow and
* pointless because we already know the slot.
*/
#if defined(DUK_USE_HEAPPTR16)
heap->strtable16[i] = heap->heapptr_deleted16;
#else
heap->strtable[i] = DUK_STRTAB_DELETED_MARKER(heap);
#endif
/* free inner references (these exist e.g. when external
* strings are enabled)
*/
duk_free_hstring_inner(heap, (duk_hstring *) h);
/* finally free the struct itself */
DUK_FREE(heap, h);
}
#ifdef DUK_USE_DEBUG
DUK_D(DUK_DPRINT("mark-and-sweep sweep stringtable: %ld freed, %ld kept",
(long) count_free, (long) count_keep));
#endif
*out_count_keep = count_keep;
}
#endif /* DUK_USE_STRTAB_PROBE */
/*
* Sweep heap
*/
DUK_LOCAL void duk__sweep_heap(duk_heap *heap, duk_int_t flags, duk_size_t *out_count_keep) {
duk_heaphdr *prev; /* last element that was left in the heap */
duk_heaphdr *curr;
duk_heaphdr *next;
#ifdef DUK_USE_DEBUG
duk_size_t count_free = 0;
duk_size_t count_finalize = 0;
duk_size_t count_rescue = 0;
#endif
duk_size_t count_keep = 0;
DUK_UNREF(flags);
DUK_DD(DUK_DDPRINT("duk__sweep_heap: %p", (void *) heap));
prev = NULL;
curr = heap->heap_allocated;
heap->heap_allocated = NULL;
while (curr) {
/* Strings and ROM objects are never placed on the heap allocated list. */
DUK_ASSERT(DUK_HEAPHDR_GET_TYPE(curr) != DUK_HTYPE_STRING);
DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY(curr));
next = DUK_HEAPHDR_GET_NEXT(heap, curr);
if (DUK_HEAPHDR_HAS_REACHABLE(curr)) {
/*
* Reachable object, keep
*/
DUK_DDD(DUK_DDDPRINT("sweep, reachable: %p", (void *) curr));
if (DUK_HEAPHDR_HAS_FINALIZABLE(curr)) {
/*
* If object has been marked finalizable, move it to the
* "to be finalized" work list. It will be collected on
* the next mark-and-sweep if it is still unreachable
* after running the finalizer.
*/
DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZED(curr));
DUK_ASSERT(DUK_HEAPHDR_GET_TYPE(curr) == DUK_HTYPE_OBJECT);
DUK_DDD(DUK_DDDPRINT("object has finalizer, move to finalization work list: %p", (void *) curr));
#ifdef DUK_USE_DOUBLE_LINKED_HEAP
if (heap->finalize_list) {
DUK_HEAPHDR_SET_PREV(heap, heap->finalize_list, curr);
}
DUK_HEAPHDR_SET_PREV(heap, curr, NULL);
#endif
DUK_HEAPHDR_SET_NEXT(heap, curr, heap->finalize_list);
DUK_ASSERT_HEAPHDR_LINKS(heap, curr);
heap->finalize_list = curr;
#ifdef DUK_USE_DEBUG
count_finalize++;
#endif
} else {
/*
* Object will be kept; queue object back to heap_allocated (to tail)
*/
if (DUK_HEAPHDR_HAS_FINALIZED(curr)) {
/*
* Object's finalizer was executed on last round, and
* object has been happily rescued.
*/
DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZABLE(curr));
DUK_ASSERT(DUK_HEAPHDR_GET_TYPE(curr) == DUK_HTYPE_OBJECT);
DUK_DD(DUK_DDPRINT("object rescued during mark-and-sweep finalization: %p", (void *) curr));
#ifdef DUK_USE_DEBUG
count_rescue++;
#endif
} else {
/*
* Plain, boring reachable object.
*/
DUK_DD(DUK_DDPRINT("keep object: %!iO", curr));
count_keep++;
}
if (!heap->heap_allocated) {
heap->heap_allocated = curr;
}
if (prev) {
DUK_HEAPHDR_SET_NEXT(heap, prev, curr);
}
#ifdef DUK_USE_DOUBLE_LINKED_HEAP
DUK_HEAPHDR_SET_PREV(heap, curr, prev);
#endif
DUK_ASSERT_HEAPHDR_LINKS(heap, prev);
DUK_ASSERT_HEAPHDR_LINKS(heap, curr);
prev = curr;
}
DUK_HEAPHDR_CLEAR_REACHABLE(curr);
DUK_HEAPHDR_CLEAR_FINALIZED(curr);
DUK_HEAPHDR_CLEAR_FINALIZABLE(curr);
DUK_ASSERT(!DUK_HEAPHDR_HAS_REACHABLE(curr));
DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZED(curr));
DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZABLE(curr));
curr = next;
} else {
/*
* Unreachable object, free
*/
DUK_DDD(DUK_DDDPRINT("sweep, not reachable: %p", (void *) curr));
#if defined(DUK_USE_REFERENCE_COUNTING)
/* Non-zero refcounts should not happen because we refcount
* finalize all unreachable objects which should cancel out
* refcounts (even for cycles).
*/
DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(curr) == 0);
#endif
DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZABLE(curr));
if (DUK_HEAPHDR_HAS_FINALIZED(curr)) {
DUK_DDD(DUK_DDDPRINT("finalized object not rescued: %p", (void *) curr));
}
/* Note: object cannot be a finalizable unreachable object, as
* they have been marked temporarily reachable for this round,
* and are handled above.
*/
#ifdef DUK_USE_DEBUG
count_free++;
#endif
/* weak refs should be handled here, but no weak refs for
* any non-string objects exist right now.
*/
/* free object and all auxiliary (non-heap) allocs */
duk_heap_free_heaphdr_raw(heap, curr);
curr = next;
}
}
if (prev) {
DUK_HEAPHDR_SET_NEXT(heap, prev, NULL);
}
DUK_ASSERT_HEAPHDR_LINKS(heap, prev);
#ifdef DUK_USE_DEBUG
DUK_D(DUK_DPRINT("mark-and-sweep sweep objects (non-string): %ld freed, %ld kept, %ld rescued, %ld queued for finalization",
(long) count_free, (long) count_keep, (long) count_rescue, (long) count_finalize));
#endif
*out_count_keep = count_keep;
}
/*
* Run (object) finalizers in the "to be finalized" work list.
*/
DUK_LOCAL void duk__run_object_finalizers(duk_heap *heap, duk_small_uint_t flags) {
duk_heaphdr *curr;
duk_heaphdr *next;
#ifdef DUK_USE_DEBUG
duk_size_t count = 0;
#endif
duk_hthread *thr;
DUK_DD(DUK_DDPRINT("duk__run_object_finalizers: %p", (void *) heap));
thr = duk__get_temp_hthread(heap);
DUK_ASSERT(thr != NULL);
curr = heap->finalize_list;
while (curr) {
DUK_DDD(DUK_DDDPRINT("mark-and-sweep finalize: %p", (void *) curr));
DUK_ASSERT(DUK_HEAPHDR_GET_TYPE(curr) == DUK_HTYPE_OBJECT); /* only objects have finalizers */
DUK_ASSERT(!DUK_HEAPHDR_HAS_REACHABLE(curr)); /* flags have been already cleared */
DUK_ASSERT(!DUK_HEAPHDR_HAS_TEMPROOT(curr));
DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZABLE(curr));
DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZED(curr));
DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY(curr)); /* No finalizers for ROM objects */
if (DUK_LIKELY((flags & DUK_MS_FLAG_SKIP_FINALIZERS) == 0)) {
/* Run the finalizer, duk_hobject_run_finalizer() sets FINALIZED.
* Next mark-and-sweep will collect the object unless it has
* become reachable (i.e. rescued). FINALIZED prevents the
* finalizer from being executed again before that.
*/
duk_hobject_run_finalizer(thr, (duk_hobject *) curr); /* must never longjmp */
DUK_ASSERT(DUK_HEAPHDR_HAS_FINALIZED(curr));
} else {
/* Used during heap destruction: don't actually run finalizers
* because we're heading into forced finalization. Instead,
* queue finalizable objects back to the heap_allocated list.
*/
DUK_D(DUK_DPRINT("skip finalizers flag set, queue object to heap_allocated without finalizing"));
DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZED(curr));
}
/* queue back to heap_allocated */
next = DUK_HEAPHDR_GET_NEXT(heap, curr);
DUK_HEAP_INSERT_INTO_HEAP_ALLOCATED(heap, curr);
curr = next;
#ifdef DUK_USE_DEBUG
count++;
#endif
}
/* finalize_list will always be processed completely */
heap->finalize_list = NULL;
#ifdef DUK_USE_DEBUG
DUK_D(DUK_DPRINT("mark-and-sweep finalize objects: %ld finalizers called", (long) count));
#endif
}
/*
* Object compaction.
*
* Compaction is assumed to never throw an error.
*/
DUK_LOCAL int duk__protected_compact_object(duk_context *ctx) {
/* XXX: for threads, compact value stack, call stack, catch stack? */
duk_hobject *obj = duk_get_hobject(ctx, -1);
DUK_ASSERT(obj != NULL);
duk_hobject_compact_props((duk_hthread *) ctx, obj);
return 0;
}
#ifdef DUK_USE_DEBUG
DUK_LOCAL void duk__compact_object_list(duk_heap *heap, duk_hthread *thr, duk_heaphdr *start, duk_size_t *p_count_check, duk_size_t *p_count_compact, duk_size_t *p_count_bytes_saved) {
#else
DUK_LOCAL void duk__compact_object_list(duk_heap *heap, duk_hthread *thr, duk_heaphdr *start) {
#endif
duk_heaphdr *curr;
#ifdef DUK_USE_DEBUG
duk_size_t old_size, new_size;
#endif
duk_hobject *obj;
DUK_UNREF(heap);
curr = start;
while (curr) {
DUK_DDD(DUK_DDDPRINT("mark-and-sweep compact: %p", (void *) curr));
if (DUK_HEAPHDR_GET_TYPE(curr) != DUK_HTYPE_OBJECT) {
goto next;
}
obj = (duk_hobject *) curr;
#ifdef DUK_USE_DEBUG
old_size = DUK_HOBJECT_P_COMPUTE_SIZE(DUK_HOBJECT_GET_ESIZE(obj),
DUK_HOBJECT_GET_ASIZE(obj),
DUK_HOBJECT_GET_HSIZE(obj));
#endif
DUK_DD(DUK_DDPRINT("compact object: %p", (void *) obj));
duk_push_hobject((duk_context *) thr, obj);
/* XXX: disable error handlers for duration of compaction? */
duk_safe_call((duk_context *) thr, duk__protected_compact_object, 1, 0);
#ifdef DUK_USE_DEBUG
new_size = DUK_HOBJECT_P_COMPUTE_SIZE(DUK_HOBJECT_GET_ESIZE(obj),
DUK_HOBJECT_GET_ASIZE(obj),
DUK_HOBJECT_GET_HSIZE(obj));
#endif
#ifdef DUK_USE_DEBUG
(*p_count_compact)++;
(*p_count_bytes_saved) += (duk_size_t) (old_size - new_size);
#endif
next:
curr = DUK_HEAPHDR_GET_NEXT(heap, curr);
#ifdef DUK_USE_DEBUG
(*p_count_check)++;
#endif
}
}
DUK_LOCAL void duk__compact_objects(duk_heap *heap) {
/* XXX: which lists should participate? to be finalized? */
#ifdef DUK_USE_DEBUG
duk_size_t count_check = 0;
duk_size_t count_compact = 0;
duk_size_t count_bytes_saved = 0;
#endif
duk_hthread *thr;
DUK_DD(DUK_DDPRINT("duk__compact_objects: %p", (void *) heap));
thr = duk__get_temp_hthread(heap);
DUK_ASSERT(thr != NULL);
#ifdef DUK_USE_DEBUG
duk__compact_object_list(heap, thr, heap->heap_allocated, &count_check, &count_compact, &count_bytes_saved);
duk__compact_object_list(heap, thr, heap->finalize_list, &count_check, &count_compact, &count_bytes_saved);
#ifdef DUK_USE_REFERENCE_COUNTING
duk__compact_object_list(heap, thr, heap->refzero_list, &count_check, &count_compact, &count_bytes_saved);
#endif
#else
duk__compact_object_list(heap, thr, heap->heap_allocated);
duk__compact_object_list(heap, thr, heap->finalize_list);
#ifdef DUK_USE_REFERENCE_COUNTING
duk__compact_object_list(heap, thr, heap->refzero_list);
#endif
#endif
#ifdef DUK_USE_DEBUG
DUK_D(DUK_DPRINT("mark-and-sweep compact objects: %ld checked, %ld compaction attempts, %ld bytes saved by compaction",
(long) count_check, (long) count_compact, (long) count_bytes_saved));
#endif
}
/*
* Assertion helpers.
*/
#ifdef DUK_USE_ASSERTIONS
DUK_LOCAL void duk__assert_heaphdr_flags(duk_heap *heap) {
duk_heaphdr *hdr;
hdr = heap->heap_allocated;
while (hdr) {
DUK_ASSERT(!DUK_HEAPHDR_HAS_REACHABLE(hdr));
DUK_ASSERT(!DUK_HEAPHDR_HAS_TEMPROOT(hdr));
DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZABLE(hdr));
/* may have FINALIZED */
hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr);
}
#ifdef DUK_USE_REFERENCE_COUNTING
hdr = heap->refzero_list;
while (hdr) {
DUK_ASSERT(!DUK_HEAPHDR_HAS_REACHABLE(hdr));
DUK_ASSERT(!DUK_HEAPHDR_HAS_TEMPROOT(hdr));
DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZABLE(hdr));
DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZED(hdr));
hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr);
}
#endif /* DUK_USE_REFERENCE_COUNTING */
}
#ifdef DUK_USE_REFERENCE_COUNTING
DUK_LOCAL void duk__assert_valid_refcounts(duk_heap *heap) {
duk_heaphdr *hdr = heap->heap_allocated;
while (hdr) {
if (DUK_HEAPHDR_GET_REFCOUNT(hdr) == 0 &&
DUK_HEAPHDR_HAS_FINALIZED(hdr)) {
/* An object may be in heap_allocated list with a zero
* refcount if it has just been finalized and is waiting
* to be collected by the next cycle.
*/
} else if (DUK_HEAPHDR_GET_REFCOUNT(hdr) == 0) {
/* An object may be in heap_allocated list with a zero
* refcount also if it is a temporary object created by
* a finalizer; because finalization now runs inside
* mark-and-sweep, such objects will not be queued to
* refzero_list and will thus appear here with refcount
* zero.
*/
#if 0 /* this case can no longer occur because refcount is unsigned */
} else if (DUK_HEAPHDR_GET_REFCOUNT(hdr) < 0) {
DUK_D(DUK_DPRINT("invalid refcount: %ld, %p -> %!O",
(hdr != NULL ? (long) DUK_HEAPHDR_GET_REFCOUNT(hdr) : (long) 0),
(void *) hdr, (duk_heaphdr *) hdr));
DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(hdr) > 0);
#endif
}
hdr = DUK_HEAPHDR_GET_NEXT(heap, hdr);
}
}
#endif /* DUK_USE_REFERENCE_COUNTING */
#endif /* DUK_USE_ASSERTIONS */
/*
* Finalizer torture. Do one fake finalizer call which causes side effects
* similar to one or more finalizers on actual objects.
*/
#if defined(DUK_USE_MARKANDSWEEP_FINALIZER_TORTURE)
DUK_LOCAL duk_ret_t duk__markandsweep_fake_finalizer(duk_context *ctx) {
DUK_D(DUK_DPRINT("fake mark-and-sweep torture finalizer executed"));
/* Require a lot of stack to force a value stack grow/shrink.
* Recursive mark-and-sweep is prevented by allocation macros
* so this won't trigger another mark-and-sweep.
*/
duk_require_stack(ctx, 100000);
/* XXX: do something to force a callstack grow/shrink, perhaps
* just a manual forced resize or a forced relocating realloc?
*/
return 0;
}
DUK_LOCAL void duk__markandsweep_torture_finalizer(duk_hthread *thr) {
duk_context *ctx;
duk_int_t rc;
DUK_ASSERT(thr != NULL);
ctx = (duk_context *) thr;
/* Avoid fake finalization when callstack limit has been reached.
* Otherwise a callstack limit error will be created, then refzero'ed.
*/
if (thr->heap->call_recursion_depth >= thr->heap->call_recursion_limit ||
thr->callstack_size + 2 * DUK_CALLSTACK_GROW_STEP >= thr->callstack_max /*approximate*/) {
DUK_D(DUK_DPRINT("call recursion depth reached, avoid fake mark-and-sweep torture finalizer"));
return;
}
/* Run fake finalizer. Avoid creating unnecessary garbage. */
duk_push_c_function(ctx, duk__markandsweep_fake_finalizer, 0 /*nargs*/);
rc = duk_pcall(ctx, 0 /*nargs*/);
DUK_UNREF(rc); /* ignored */
duk_pop(ctx);
}
#endif /* DUK_USE_MARKANDSWEEP_FINALIZER_TORTURE */
/*
* Main mark-and-sweep function.
*
* 'flags' represents the features requested by the caller. The current
* heap->mark_and_sweep_base_flags is ORed automatically into the flags;
* the base flags mask typically prevents certain mark-and-sweep operations
* to avoid trouble.
*/
DUK_INTERNAL duk_bool_t duk_heap_mark_and_sweep(duk_heap *heap, duk_small_uint_t flags) {
duk_hthread *thr;
duk_size_t count_keep_obj;
duk_size_t count_keep_str;
#ifdef DUK_USE_VOLUNTARY_GC
duk_size_t tmp;
#endif
/* XXX: thread selection for mark-and-sweep is currently a hack.
* If we don't have a thread, the entire mark-and-sweep is now
* skipped (although we could just skip finalizations).
*/
/* If thr != NULL, the thr may still be in the middle of
* initialization.
* XXX: Improve the thread viability test.
*/
thr = duk__get_temp_hthread(heap);
if (thr == NULL) {
DUK_D(DUK_DPRINT("gc skipped because we don't have a temp thread"));
/* reset voluntary gc trigger count */
#ifdef DUK_USE_VOLUNTARY_GC
heap->mark_and_sweep_trigger_counter = DUK_HEAP_MARK_AND_SWEEP_TRIGGER_SKIP;
#endif
return 0; /* OK */
}
/* If debugger is paused, garbage collection is disabled by default. */
/* XXX: will need a force flag if garbage collection is triggered
* explicitly during paused state.
*/
#if defined(DUK_USE_DEBUGGER_SUPPORT)
if (DUK_HEAP_IS_PAUSED(heap)) {
/* Checking this here rather that in memory alloc primitives
* reduces checking code there but means a failed allocation
* will go through a few retries before giving up. That's
* fine because this only happens during debugging.
*/
DUK_D(DUK_DPRINT("gc skipped because debugger is paused"));
return 0;
}
#endif
DUK_D(DUK_DPRINT("garbage collect (mark-and-sweep) starting, requested flags: 0x%08lx, effective flags: 0x%08lx",
(unsigned long) flags, (unsigned long) (flags | heap->mark_and_sweep_base_flags)));
flags |= heap->mark_and_sweep_base_flags;
/*
* Assertions before
*/
#ifdef DUK_USE_ASSERTIONS
DUK_ASSERT(!DUK_HEAP_HAS_MARKANDSWEEP_RUNNING(heap));
DUK_ASSERT(!DUK_HEAP_HAS_MARKANDSWEEP_RECLIMIT_REACHED(heap));
DUK_ASSERT(heap->mark_and_sweep_recursion_depth == 0);
duk__assert_heaphdr_flags(heap);
#ifdef DUK_USE_REFERENCE_COUNTING
/* Note: DUK_HEAP_HAS_REFZERO_FREE_RUNNING(heap) may be true; a refcount
* finalizer may trigger a mark-and-sweep.
*/
duk__assert_valid_refcounts(heap);
#endif /* DUK_USE_REFERENCE_COUNTING */
#endif /* DUK_USE_ASSERTIONS */
/*
* Begin
*/
DUK_HEAP_SET_MARKANDSWEEP_RUNNING(heap);
/*
* Mark roots, hoping that recursion limit is not normally hit.
* If recursion limit is hit, run additional reachability rounds
* starting from "temproots" until marking is complete.
*
* Marking happens in two phases: first we mark actual reachability
* roots (and run "temproots" to complete the process). Then we
* check which objects are unreachable and are finalizable; such
* objects are marked as FINALIZABLE and marked as reachability
* (and "temproots" is run again to complete the process).
*
* The heap finalize_list must also be marked as a reachability root.
* There may be objects on the list from a previous round if the
* previous run had finalizer skip flag.
*/
duk__mark_roots_heap(heap); /* main reachability roots */
#ifdef DUK_USE_REFERENCE_COUNTING
duk__mark_refzero_list(heap); /* refzero_list treated as reachability roots */
#endif
duk__mark_temproots_by_heap_scan(heap); /* temproots */
duk__mark_finalizable(heap); /* mark finalizable as reachability roots */
duk__mark_finalize_list(heap); /* mark finalizer work list as reachability roots */
duk__mark_temproots_by_heap_scan(heap); /* temproots */
/*
* Sweep garbage and remove marking flags, and move objects with
* finalizers to the finalizer work list.
*
* Objects to be swept need to get their refcounts finalized before
* they are swept. In other words, their target object refcounts
* need to be decreased. This has to be done before freeing any
* objects to avoid decref'ing dangling pointers (which may happen
* even without bugs, e.g. with reference loops)
*
* Because strings don't point to other heap objects, similar
* finalization is not necessary for strings.
*/
/* XXX: more emergency behavior, e.g. find smaller hash sizes etc */
#ifdef DUK_USE_REFERENCE_COUNTING
duk__finalize_refcounts(heap);
#endif
duk__sweep_heap(heap, flags, &count_keep_obj);
#if defined(DUK_USE_STRTAB_CHAIN)
duk__sweep_stringtable_chain(heap, &count_keep_str);
#elif defined(DUK_USE_STRTAB_PROBE)
duk__sweep_stringtable_probe(heap, &count_keep_str);
#else
#error internal error, invalid strtab options
#endif
#ifdef DUK_USE_REFERENCE_COUNTING
duk__clear_refzero_list_flags(heap);
#endif
duk__clear_finalize_list_flags(heap);
/*
* Object compaction (emergency only).
*
* Object compaction is a separate step after sweeping, as there is
* more free memory for it to work with. Also, currently compaction
* may insert new objects into the heap allocated list and the string
* table which we don't want to do during a sweep (the reachability
* flags of such objects would be incorrect). The objects inserted
* are currently:
*
* - a temporary duk_hbuffer for a new properties allocation
* - if array part is abandoned, string keys are interned
*
* The object insertions go to the front of the list, so they do not
* cause an infinite loop (they are not compacted).
*/
if ((flags & DUK_MS_FLAG_EMERGENCY) &&
!(flags & DUK_MS_FLAG_NO_OBJECT_COMPACTION)) {
duk__compact_objects(heap);
}
/*
* String table resize check.
*
* Note: this may silently (and safely) fail if GC is caused by an
* allocation call in stringtable resize_hash(). Resize_hash()
* will prevent a recursive call to itself by setting the
* DUK_MS_FLAG_NO_STRINGTABLE_RESIZE in heap->mark_and_sweep_base_flags.
*/
/* XXX: stringtable emergency compaction? */
/* XXX: remove this feature entirely? it would only matter for
* emergency GC. Disable for lowest memory builds.
*/
#if defined(DUK_USE_MS_STRINGTABLE_RESIZE)
if (!(flags & DUK_MS_FLAG_NO_STRINGTABLE_RESIZE)) {
DUK_DD(DUK_DDPRINT("resize stringtable: %p", (void *) heap));
duk_heap_force_strtab_resize(heap);
} else {
DUK_D(DUK_DPRINT("stringtable resize skipped because DUK_MS_FLAG_NO_STRINGTABLE_RESIZE is set"));
}
#endif
/*
* Finalize objects in the finalization work list. Finalized
* objects are queued back to heap_allocated with FINALIZED set.
*
* Since finalizers may cause arbitrary side effects, they are
* prevented during string table and object property allocation
* resizing using the DUK_MS_FLAG_NO_FINALIZERS flag in
* heap->mark_and_sweep_base_flags. In this case the objects
* remain in the finalization work list after mark-and-sweep
* exits and they may be finalized on the next pass.
*
* Finalization currently happens inside "MARKANDSWEEP_RUNNING"
* protection (no mark-and-sweep may be triggered by the
* finalizers). As a side effect:
*
* 1) an out-of-memory error inside a finalizer will not
* cause a mark-and-sweep and may cause the finalizer
* to fail unnecessarily
*
* 2) any temporary objects whose refcount decreases to zero
* during finalization will not be put into refzero_list;
* they can only be collected by another mark-and-sweep
*
* This is not optimal, but since the sweep for this phase has
* already happened, this is probably good enough for now.
*/
#if defined(DUK_USE_MARKANDSWEEP_FINALIZER_TORTURE)
/* Cannot simulate individual finalizers because finalize_list only
* contains objects with actual finalizers. But simulate side effects
* from finalization by doing a bogus function call and resizing the
* stacks.
*/
if (flags & DUK_MS_FLAG_NO_FINALIZERS) {
DUK_D(DUK_DPRINT("skip mark-and-sweep torture finalizer, DUK_MS_FLAG_NO_FINALIZERS is set"));
} else if (!(thr->valstack != NULL && thr->callstack != NULL && thr->catchstack != NULL)) {
DUK_D(DUK_DPRINT("skip mark-and-sweep torture finalizer, thread not yet viable"));
} else {
DUK_D(DUK_DPRINT("run mark-and-sweep torture finalizer"));
duk__markandsweep_torture_finalizer(thr);
}
#endif /* DUK_USE_MARKANDSWEEP_FINALIZER_TORTURE */
if (flags & DUK_MS_FLAG_NO_FINALIZERS) {
DUK_D(DUK_DPRINT("finalizer run skipped because DUK_MS_FLAG_NO_FINALIZERS is set"));
} else {
duk__run_object_finalizers(heap, flags);
}
/*
* Finish
*/
DUK_HEAP_CLEAR_MARKANDSWEEP_RUNNING(heap);
/*
* Assertions after
*/
#ifdef DUK_USE_ASSERTIONS
DUK_ASSERT(!DUK_HEAP_HAS_MARKANDSWEEP_RUNNING(heap));
DUK_ASSERT(!DUK_HEAP_HAS_MARKANDSWEEP_RECLIMIT_REACHED(heap));
DUK_ASSERT(heap->mark_and_sweep_recursion_depth == 0);
duk__assert_heaphdr_flags(heap);
#ifdef DUK_USE_REFERENCE_COUNTING
/* Note: DUK_HEAP_HAS_REFZERO_FREE_RUNNING(heap) may be true; a refcount
* finalizer may trigger a mark-and-sweep.
*/
duk__assert_valid_refcounts(heap);
#endif /* DUK_USE_REFERENCE_COUNTING */
#endif /* DUK_USE_ASSERTIONS */
/*
* Reset trigger counter
*/
#ifdef DUK_USE_VOLUNTARY_GC
tmp = (count_keep_obj + count_keep_str) / 256;
heap->mark_and_sweep_trigger_counter = (duk_int_t) (
(tmp * DUK_HEAP_MARK_AND_SWEEP_TRIGGER_MULT) +
DUK_HEAP_MARK_AND_SWEEP_TRIGGER_ADD);
DUK_D(DUK_DPRINT("garbage collect (mark-and-sweep) finished: %ld objects kept, %ld strings kept, trigger reset to %ld",
(long) count_keep_obj, (long) count_keep_str, (long) heap->mark_and_sweep_trigger_counter));
#else
DUK_D(DUK_DPRINT("garbage collect (mark-and-sweep) finished: %ld objects kept, %ld strings kept, no voluntary trigger",
(long) count_keep_obj, (long) count_keep_str));
#endif
return 0; /* OK */
}
#else /* DUK_USE_MARK_AND_SWEEP */
/* no mark-and-sweep gc */
#endif /* DUK_USE_MARK_AND_SWEEP */
#line 1 "duk_heap_memory.c"
/*
* Memory allocation handling.
*/
/* include removed: duk_internal.h */
/*
* Helpers
*
* The fast path checks are done within a macro to ensure "inlining"
* while the slow path actions use a helper (which won't typically be
* inlined in size optimized builds).
*/
#if defined(DUK_USE_MARK_AND_SWEEP) && defined(DUK_USE_VOLUNTARY_GC)
#define DUK__VOLUNTARY_PERIODIC_GC(heap) do { \
(heap)->mark_and_sweep_trigger_counter--; \
if ((heap)->mark_and_sweep_trigger_counter <= 0) { \
duk__run_voluntary_gc(heap); \
} \
} while (0)
DUK_LOCAL void duk__run_voluntary_gc(duk_heap *heap) {
if (DUK_HEAP_HAS_MARKANDSWEEP_RUNNING(heap)) {
DUK_DD(DUK_DDPRINT("mark-and-sweep in progress -> skip voluntary mark-and-sweep now"));
} else {
duk_small_uint_t flags;
duk_bool_t rc;
DUK_D(DUK_DPRINT("triggering voluntary mark-and-sweep"));
flags = 0;
rc = duk_heap_mark_and_sweep(heap, flags);
DUK_UNREF(rc);
}
}
#else
#define DUK__VOLUNTARY_PERIODIC_GC(heap) /* no voluntary gc */
#endif /* DUK_USE_MARK_AND_SWEEP && DUK_USE_VOLUNTARY_GC */
/*
* Allocate memory with garbage collection
*/
#ifdef DUK_USE_MARK_AND_SWEEP
DUK_INTERNAL void *duk_heap_mem_alloc(duk_heap *heap, duk_size_t size) {
void *res;
duk_bool_t rc;
duk_small_int_t i;
DUK_ASSERT(heap != NULL);
DUK_ASSERT_DISABLE(size >= 0);
/*
* Voluntary periodic GC (if enabled)
*/
DUK__VOLUNTARY_PERIODIC_GC(heap);
/*
* First attempt
*/
#ifdef DUK_USE_GC_TORTURE
/* simulate alloc failure on every alloc (except when mark-and-sweep is running) */
if (!DUK_HEAP_HAS_MARKANDSWEEP_RUNNING(heap)) {
DUK_DDD(DUK_DDDPRINT("gc torture enabled, pretend that first alloc attempt fails"));
res = NULL;
DUK_UNREF(res);
goto skip_attempt;
}
#endif
res = heap->alloc_func(heap->heap_udata, size);
if (res || size == 0) {
/* for zero size allocations NULL is allowed */
return res;
}
#ifdef DUK_USE_GC_TORTURE
skip_attempt:
#endif
DUK_D(DUK_DPRINT("first alloc attempt failed, attempt to gc and retry"));
/*
* Avoid a GC if GC is already running. This can happen at a late
* stage in a GC when we try to e.g. resize the stringtable
* or compact objects.
*/
if (DUK_HEAP_HAS_MARKANDSWEEP_RUNNING(heap)) {
DUK_D(DUK_DPRINT("duk_heap_mem_alloc() failed, gc in progress (gc skipped), alloc size %ld", (long) size));
return NULL;
}
/*
* Retry with several GC attempts. Initial attempts are made without
* emergency mode; later attempts use emergency mode which minimizes
* memory allocations forcibly.
*/
for (i = 0; i < DUK_HEAP_ALLOC_FAIL_MARKANDSWEEP_LIMIT; i++) {
duk_small_uint_t flags;
flags = 0;
if (i >= DUK_HEAP_ALLOC_FAIL_MARKANDSWEEP_EMERGENCY_LIMIT - 1) {
flags |= DUK_MS_FLAG_EMERGENCY;
}
rc = duk_heap_mark_and_sweep(heap, flags);
DUK_UNREF(rc);
res = heap->alloc_func(heap->heap_udata, size);
if (res) {
DUK_D(DUK_DPRINT("duk_heap_mem_alloc() succeeded after gc (pass %ld), alloc size %ld",
(long) (i + 1), (long) size));
return res;
}
}
DUK_D(DUK_DPRINT("duk_heap_mem_alloc() failed even after gc, alloc size %ld", (long) size));
return NULL;
}
#else /* DUK_USE_MARK_AND_SWEEP */
/*
* Compared to a direct macro expansion this wrapper saves a few
* instructions because no heap dereferencing is required.
*/
DUK_INTERNAL void *duk_heap_mem_alloc(duk_heap *heap, duk_size_t size) {
DUK_ASSERT(heap != NULL);
DUK_ASSERT_DISABLE(size >= 0);
return heap->alloc_func(heap->heap_udata, size);
}
#endif /* DUK_USE_MARK_AND_SWEEP */
DUK_INTERNAL void *duk_heap_mem_alloc_zeroed(duk_heap *heap, duk_size_t size) {
void *res;
DUK_ASSERT(heap != NULL);
DUK_ASSERT_DISABLE(size >= 0);
res = DUK_ALLOC(heap, size);
if (res) {
/* assume memset with zero size is OK */
DUK_MEMZERO(res, size);
}
return res;
}
/*
* Reallocate memory with garbage collection
*/
#ifdef DUK_USE_MARK_AND_SWEEP
DUK_INTERNAL void *duk_heap_mem_realloc(duk_heap *heap, void *ptr, duk_size_t newsize) {
void *res;
duk_bool_t rc;
duk_small_int_t i;
DUK_ASSERT(heap != NULL);
/* ptr may be NULL */
DUK_ASSERT_DISABLE(newsize >= 0);
/*
* Voluntary periodic GC (if enabled)
*/
DUK__VOLUNTARY_PERIODIC_GC(heap);
/*
* First attempt
*/
#ifdef DUK_USE_GC_TORTURE
/* simulate alloc failure on every realloc (except when mark-and-sweep is running) */
if (!DUK_HEAP_HAS_MARKANDSWEEP_RUNNING(heap)) {
DUK_DDD(DUK_DDDPRINT("gc torture enabled, pretend that first realloc attempt fails"));
res = NULL;
DUK_UNREF(res);
goto skip_attempt;
}
#endif
res = heap->realloc_func(heap->heap_udata, ptr, newsize);
if (res || newsize == 0) {
/* for zero size allocations NULL is allowed */
return res;
}
#ifdef DUK_USE_GC_TORTURE
skip_attempt:
#endif
DUK_D(DUK_DPRINT("first realloc attempt failed, attempt to gc and retry"));
/*
* Avoid a GC if GC is already running. See duk_heap_mem_alloc().
*/
if (DUK_HEAP_HAS_MARKANDSWEEP_RUNNING(heap)) {
DUK_D(DUK_DPRINT("duk_heap_mem_realloc() failed, gc in progress (gc skipped), alloc size %ld", (long) newsize));
return NULL;
}
/*
* Retry with several GC attempts. Initial attempts are made without
* emergency mode; later attempts use emergency mode which minimizes
* memory allocations forcibly.
*/
for (i = 0; i < DUK_HEAP_ALLOC_FAIL_MARKANDSWEEP_LIMIT; i++) {
duk_small_uint_t flags;
flags = 0;
if (i >= DUK_HEAP_ALLOC_FAIL_MARKANDSWEEP_EMERGENCY_LIMIT - 1) {
flags |= DUK_MS_FLAG_EMERGENCY;
}
rc = duk_heap_mark_and_sweep(heap, flags);
DUK_UNREF(rc);
res = heap->realloc_func(heap->heap_udata, ptr, newsize);
if (res || newsize == 0) {
DUK_D(DUK_DPRINT("duk_heap_mem_realloc() succeeded after gc (pass %ld), alloc size %ld",
(long) (i + 1), (long) newsize));
return res;
}
}
DUK_D(DUK_DPRINT("duk_heap_mem_realloc() failed even after gc, alloc size %ld", (long) newsize));
return NULL;
}
#else /* DUK_USE_MARK_AND_SWEEP */
/* saves a few instructions to have this wrapper (see comment on duk_heap_mem_alloc) */
DUK_INTERNAL void *duk_heap_mem_realloc(duk_heap *heap, void *ptr, duk_size_t newsize) {
DUK_ASSERT(heap != NULL);
/* ptr may be NULL */
DUK_ASSERT_DISABLE(newsize >= 0);
return heap->realloc_func(heap->heap_udata, ptr, newsize);
}
#endif /* DUK_USE_MARK_AND_SWEEP */
/*
* Reallocate memory with garbage collection, using a callback to provide
* the current allocated pointer. This variant is used when a mark-and-sweep
* (e.g. finalizers) might change the original pointer.
*/
#ifdef DUK_USE_MARK_AND_SWEEP
DUK_INTERNAL void *duk_heap_mem_realloc_indirect(duk_heap *heap, duk_mem_getptr cb, void *ud, duk_size_t newsize) {
void *res;
duk_bool_t rc;
duk_small_int_t i;
DUK_ASSERT(heap != NULL);
DUK_ASSERT_DISABLE(newsize >= 0);
/*
* Voluntary periodic GC (if enabled)
*/
DUK__VOLUNTARY_PERIODIC_GC(heap);
/*
* First attempt
*/
#ifdef DUK_USE_GC_TORTURE
/* simulate alloc failure on every realloc (except when mark-and-sweep is running) */
if (!DUK_HEAP_HAS_MARKANDSWEEP_RUNNING(heap)) {
DUK_DDD(DUK_DDDPRINT("gc torture enabled, pretend that first indirect realloc attempt fails"));
res = NULL;
DUK_UNREF(res);
goto skip_attempt;
}
#endif
res = heap->realloc_func(heap->heap_udata, cb(heap, ud), newsize);
if (res || newsize == 0) {
/* for zero size allocations NULL is allowed */
return res;
}
#ifdef DUK_USE_GC_TORTURE
skip_attempt:
#endif
DUK_D(DUK_DPRINT("first indirect realloc attempt failed, attempt to gc and retry"));
/*
* Avoid a GC if GC is already running. See duk_heap_mem_alloc().
*/
if (DUK_HEAP_HAS_MARKANDSWEEP_RUNNING(heap)) {
DUK_D(DUK_DPRINT("duk_heap_mem_realloc_indirect() failed, gc in progress (gc skipped), alloc size %ld", (long) newsize));
return NULL;
}
/*
* Retry with several GC attempts. Initial attempts are made without
* emergency mode; later attempts use emergency mode which minimizes
* memory allocations forcibly.
*/
for (i = 0; i < DUK_HEAP_ALLOC_FAIL_MARKANDSWEEP_LIMIT; i++) {
duk_small_uint_t flags;
#ifdef DUK_USE_ASSERTIONS
void *ptr_pre; /* ptr before mark-and-sweep */
void *ptr_post;
#endif
#ifdef DUK_USE_ASSERTIONS
ptr_pre = cb(heap, ud);
#endif
flags = 0;
if (i >= DUK_HEAP_ALLOC_FAIL_MARKANDSWEEP_EMERGENCY_LIMIT - 1) {
flags |= DUK_MS_FLAG_EMERGENCY;
}
rc = duk_heap_mark_and_sweep(heap, flags);
DUK_UNREF(rc);
#ifdef DUK_USE_ASSERTIONS
ptr_post = cb(heap, ud);
if (ptr_pre != ptr_post) {
/* useful for debugging */
DUK_DD(DUK_DDPRINT("note: base pointer changed by mark-and-sweep: %p -> %p",
(void *) ptr_pre, (void *) ptr_post));
}
#endif
/* Note: key issue here is to re-lookup the base pointer on every attempt.
* The pointer being reallocated may change after every mark-and-sweep.
*/
res = heap->realloc_func(heap->heap_udata, cb(heap, ud), newsize);
if (res || newsize == 0) {
DUK_D(DUK_DPRINT("duk_heap_mem_realloc_indirect() succeeded after gc (pass %ld), alloc size %ld",
(long) (i + 1), (long) newsize));
return res;
}
}
DUK_D(DUK_DPRINT("duk_heap_mem_realloc_indirect() failed even after gc, alloc size %ld", (long) newsize));
return NULL;
}
#else /* DUK_USE_MARK_AND_SWEEP */
/* saves a few instructions to have this wrapper (see comment on duk_heap_mem_alloc) */
DUK_INTERNAL void *duk_heap_mem_realloc_indirect(duk_heap *heap, duk_mem_getptr cb, void *ud, duk_size_t newsize) {
return heap->realloc_func(heap->heap_udata, cb(heap, ud), newsize);
}
#endif /* DUK_USE_MARK_AND_SWEEP */
/*
* Free memory
*/
#ifdef DUK_USE_MARK_AND_SWEEP
DUK_INTERNAL void duk_heap_mem_free(duk_heap *heap, void *ptr) {
DUK_ASSERT(heap != NULL);
/* ptr may be NULL */
/* Must behave like a no-op with NULL and any pointer returned from
* malloc/realloc with zero size.
*/
heap->free_func(heap->heap_udata, ptr);
/* Count free operations toward triggering a GC but never actually trigger
* a GC from a free. Otherwise code which frees internal structures would
* need to put in NULLs at every turn to ensure the object is always in
* consistent state for a mark-and-sweep.
*/
#ifdef DUK_USE_VOLUNTARY_GC
heap->mark_and_sweep_trigger_counter--;
#endif
}
#else
/* saves a few instructions to have this wrapper (see comment on duk_heap_mem_alloc) */
DUK_INTERNAL void duk_heap_mem_free(duk_heap *heap, void *ptr) {
DUK_ASSERT(heap != NULL);
/* ptr may be NULL */
/* Note: must behave like a no-op with NULL and any pointer
* returned from malloc/realloc with zero size.
*/
heap->free_func(heap->heap_udata, ptr);
}
#endif
#line 1 "duk_heap_misc.c"
/*
* Support functions for duk_heap.
*/
/* include removed: duk_internal.h */
#if defined(DUK_USE_DOUBLE_LINKED_HEAP) && defined(DUK_USE_REFERENCE_COUNTING)
/* arbitrary remove only works with double linked heap, and is only required by
* reference counting so far.
*/
DUK_INTERNAL void duk_heap_remove_any_from_heap_allocated(duk_heap *heap, duk_heaphdr *hdr) {
DUK_ASSERT(DUK_HEAPHDR_GET_TYPE(hdr) != DUK_HTYPE_STRING);
if (DUK_HEAPHDR_GET_PREV(heap, hdr)) {
DUK_HEAPHDR_SET_NEXT(heap, DUK_HEAPHDR_GET_PREV(heap, hdr), DUK_HEAPHDR_GET_NEXT(heap, hdr));
} else {
heap->heap_allocated = DUK_HEAPHDR_GET_NEXT(heap, hdr);
}
if (DUK_HEAPHDR_GET_NEXT(heap, hdr)) {
DUK_HEAPHDR_SET_PREV(heap, DUK_HEAPHDR_GET_NEXT(heap, hdr), DUK_HEAPHDR_GET_PREV(heap, hdr));
} else {
;
}
/* The prev/next pointers of the removed duk_heaphdr are left as garbage.
* It's up to the caller to ensure they're written before inserting the
* object back.
*/
}
#endif
DUK_INTERNAL void duk_heap_insert_into_heap_allocated(duk_heap *heap, duk_heaphdr *hdr) {
DUK_ASSERT(DUK_HEAPHDR_GET_TYPE(hdr) != DUK_HTYPE_STRING);
#ifdef DUK_USE_DOUBLE_LINKED_HEAP
if (heap->heap_allocated) {
DUK_ASSERT(DUK_HEAPHDR_GET_PREV(heap, heap->heap_allocated) == NULL);
DUK_HEAPHDR_SET_PREV(heap, heap->heap_allocated, hdr);
}
DUK_HEAPHDR_SET_PREV(heap, hdr, NULL);
#endif
DUK_HEAPHDR_SET_NEXT(heap, hdr, heap->heap_allocated);
heap->heap_allocated = hdr;
}
#ifdef DUK_USE_INTERRUPT_COUNTER
DUK_INTERNAL void duk_heap_switch_thread(duk_heap *heap, duk_hthread *new_thr) {
duk_hthread *curr_thr;
DUK_ASSERT(heap != NULL);
if (new_thr != NULL) {
curr_thr = heap->curr_thread;
if (curr_thr == NULL) {
/* For initial entry use default value; zero forces an
* interrupt before executing the first insturction.
*/
DUK_DD(DUK_DDPRINT("switch thread, initial entry, init default interrupt counter"));
new_thr->interrupt_counter = 0;
new_thr->interrupt_init = 0;
} else {
/* Copy interrupt counter/init value state to new thread (if any).
* It's OK for new_thr to be the same as curr_thr.
*/
#if defined(DUK_USE_DEBUG)
if (new_thr != curr_thr) {
DUK_DD(DUK_DDPRINT("switch thread, not initial entry, copy interrupt counter"));
}
#endif
new_thr->interrupt_counter = curr_thr->interrupt_counter;
new_thr->interrupt_init = curr_thr->interrupt_init;
}
} else {
DUK_DD(DUK_DDPRINT("switch thread, new thread is NULL, no interrupt counter changes"));
}
heap->curr_thread = new_thr; /* may be NULL */
}
#endif /* DUK_USE_INTERRUPT_COUNTER */
#line 1 "duk_heap_refcount.c"
/*
* Reference counting implementation.
*/
/* include removed: duk_internal.h */
#ifdef DUK_USE_REFERENCE_COUNTING
#ifndef DUK_USE_DOUBLE_LINKED_HEAP
#error internal error, reference counting requires a double linked heap
#endif
/*
* Misc
*/
DUK_LOCAL void duk__queue_refzero(duk_heap *heap, duk_heaphdr *hdr) {
/* tail insert: don't disturb head in case refzero is running */
if (heap->refzero_list != NULL) {
duk_heaphdr *hdr_prev;
hdr_prev = heap->refzero_list_tail;
DUK_ASSERT(hdr_prev != NULL);
DUK_ASSERT(DUK_HEAPHDR_GET_NEXT(heap, hdr_prev) == NULL);
DUK_HEAPHDR_SET_NEXT(heap, hdr, NULL);
DUK_HEAPHDR_SET_PREV(heap, hdr, hdr_prev);
DUK_HEAPHDR_SET_NEXT(heap, hdr_prev, hdr);
DUK_ASSERT_HEAPHDR_LINKS(heap, hdr);
DUK_ASSERT_HEAPHDR_LINKS(heap, hdr_prev);
heap->refzero_list_tail = hdr;
} else {
DUK_ASSERT(heap->refzero_list_tail == NULL);
DUK_HEAPHDR_SET_NEXT(heap, hdr, NULL);
DUK_HEAPHDR_SET_PREV(heap, hdr, NULL);
DUK_ASSERT_HEAPHDR_LINKS(heap, hdr);
heap->refzero_list = hdr;
heap->refzero_list_tail = hdr;
}
}
/*
* Heap object refcount finalization.
*
* When an object is about to be freed, all other objects it refers to must
* be decref'd. Refcount finalization does NOT free the object or its inner
* allocations (mark-and-sweep shares these helpers), it just manipulates
* the refcounts.
*
* Note that any of the decref's may cause a refcount to drop to zero, BUT
* it will not be processed inline; instead, because refzero is already
* running, the objects will just be queued to refzero list and processed
* later. This eliminates C recursion.
*/
DUK_LOCAL void duk__refcount_finalize_hobject(duk_hthread *thr, duk_hobject *h) {
duk_uint_fast32_t i;
DUK_ASSERT(h);
DUK_ASSERT(DUK_HEAPHDR_GET_TYPE((duk_heaphdr *) h) == DUK_HTYPE_OBJECT);
/* XXX: better to get base and walk forwards? */
for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(h); i++) {
duk_hstring *key = DUK_HOBJECT_E_GET_KEY(thr->heap, h, i);
if (!key) {
continue;
}
duk_heaphdr_decref(thr, (duk_heaphdr *) key);
if (DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, h, i)) {
duk_heaphdr_decref_allownull(thr, (duk_heaphdr *) DUK_HOBJECT_E_GET_VALUE_GETTER(thr->heap, h, i));
duk_heaphdr_decref_allownull(thr, (duk_heaphdr *) DUK_HOBJECT_E_GET_VALUE_SETTER(thr->heap, h, i));
} else {
duk_tval_decref(thr, DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, h, i));
}
}
for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ASIZE(h); i++) {
duk_tval_decref(thr, DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, h, i));
}
/* hash part is a 'weak reference' and does not contribute */
duk_heaphdr_decref_allownull(thr, (duk_heaphdr *) DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h));
if (DUK_HOBJECT_IS_COMPILEDFUNCTION(h)) {
duk_hcompiledfunction *f = (duk_hcompiledfunction *) h;
duk_tval *tv, *tv_end;
duk_hobject **funcs, **funcs_end;
DUK_ASSERT(DUK_HCOMPILEDFUNCTION_GET_DATA(thr->heap, f) != NULL); /* compiled functions must be created 'atomically' */
tv = DUK_HCOMPILEDFUNCTION_GET_CONSTS_BASE(thr->heap, f);
tv_end = DUK_HCOMPILEDFUNCTION_GET_CONSTS_END(thr->heap, f);
while (tv < tv_end) {
duk_tval_decref(thr, tv);
tv++;
}
funcs = DUK_HCOMPILEDFUNCTION_GET_FUNCS_BASE(thr->heap, f);
funcs_end = DUK_HCOMPILEDFUNCTION_GET_FUNCS_END(thr->heap, f);
while (funcs < funcs_end) {
duk_heaphdr_decref(thr, (duk_heaphdr *) *funcs);
funcs++;
}
duk_heaphdr_decref(thr, (duk_heaphdr *) DUK_HCOMPILEDFUNCTION_GET_DATA(thr->heap, f));
} else if (DUK_HOBJECT_IS_NATIVEFUNCTION(h)) {
duk_hnativefunction *f = (duk_hnativefunction *) h;
DUK_UNREF(f);
/* nothing to finalize */
} else if (DUK_HOBJECT_IS_BUFFEROBJECT(h)) {
duk_hbufferobject *b = (duk_hbufferobject *) h;
if (b->buf) {
duk_heaphdr_decref(thr, (duk_heaphdr *) b->buf);
}
} else if (DUK_HOBJECT_IS_THREAD(h)) {
duk_hthread *t = (duk_hthread *) h;
duk_tval *tv;
tv = t->valstack;
while (tv < t->valstack_top) {
duk_tval_decref(thr, tv);
tv++;
}
for (i = 0; i < (duk_uint_fast32_t) t->callstack_top; i++) {
duk_activation *act = t->callstack + i;
duk_heaphdr_decref_allownull(thr, (duk_heaphdr *) DUK_ACT_GET_FUNC(act));
duk_heaphdr_decref_allownull(thr, (duk_heaphdr *) act->var_env);
duk_heaphdr_decref_allownull(thr, (duk_heaphdr *) act->lex_env);
#ifdef DUK_USE_NONSTD_FUNC_CALLER_PROPERTY
duk_heaphdr_decref_allownull(thr, (duk_heaphdr *) act->prev_caller);
#endif
}
#if 0 /* nothing now */
for (i = 0; i < (duk_uint_fast32_t) t->catchstack_top; i++) {
duk_catcher *cat = t->catchstack + i;
}
#endif
for (i = 0; i < DUK_NUM_BUILTINS; i++) {
duk_heaphdr_decref_allownull(thr, (duk_heaphdr *) t->builtins[i]);
}
duk_heaphdr_decref_allownull(thr, (duk_heaphdr *) t->resumer);
}
}
DUK_INTERNAL void duk_heaphdr_refcount_finalize(duk_hthread *thr, duk_heaphdr *hdr) {
DUK_ASSERT(hdr);
switch ((int) DUK_HEAPHDR_GET_TYPE(hdr)) {
case DUK_HTYPE_OBJECT:
duk__refcount_finalize_hobject(thr, (duk_hobject *) hdr);
break;
case DUK_HTYPE_BUFFER:
/* nothing to finalize */
break;
case DUK_HTYPE_STRING:
/* cannot happen: strings are not put into refzero list (they don't even have the next/prev pointers) */
default:
DUK_UNREACHABLE();
}
}
#if defined(DUK_USE_REFZERO_FINALIZER_TORTURE)
DUK_LOCAL duk_ret_t duk__refcount_fake_finalizer(duk_context *ctx) {
DUK_UNREF(ctx);
DUK_D(DUK_DPRINT("fake refcount torture finalizer executed"));
#if 0
DUK_DD(DUK_DDPRINT("fake torture finalizer for: %!T", duk_get_tval(ctx, 0)));
#endif
/* Require a lot of stack to force a value stack grow/shrink. */
duk_require_stack(ctx, 100000);
/* XXX: do something to force a callstack grow/shrink, perhaps
* just a manual forced resize?
*/
return 0;
}
DUK_LOCAL void duk__refcount_run_torture_finalizer(duk_hthread *thr, duk_hobject *obj) {
duk_context *ctx;
duk_int_t rc;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(obj != NULL);
ctx = (duk_context *) thr;
/* Avoid fake finalization for the duk__refcount_fake_finalizer function
* itself, otherwise we're in infinite recursion.
*/
if (DUK_HOBJECT_HAS_NATIVEFUNCTION(obj)) {
if (((duk_hnativefunction *) obj)->func == duk__refcount_fake_finalizer) {
DUK_DD(DUK_DDPRINT("avoid fake torture finalizer for duk__refcount_fake_finalizer itself"));
return;
}
}
/* Avoid fake finalization when callstack limit has been reached.
* Otherwise a callstack limit error will be created, then refzero'ed,
* and we're in an infinite loop.
*/
if (thr->heap->call_recursion_depth >= thr->heap->call_recursion_limit ||
thr->callstack_size + 2 * DUK_CALLSTACK_GROW_STEP >= thr->callstack_max /*approximate*/) {
DUK_D(DUK_DPRINT("call recursion depth reached, avoid fake torture finalizer"));
return;
}
/* Run fake finalizer. Avoid creating new refzero queue entries
* so that we are not forced into a forever loop.
*/
duk_push_c_function(ctx, duk__refcount_fake_finalizer, 1 /*nargs*/);
duk_push_hobject(ctx, obj);
rc = duk_pcall(ctx, 1);
DUK_UNREF(rc); /* ignored */
duk_pop(ctx);
}
#endif /* DUK_USE_REFZERO_FINALIZER_TORTURE */
/*
* Refcount memory freeing loop.
*
* Frees objects in the refzero_pending list until the list becomes
* empty. When an object is freed, its references get decref'd and
* may cause further objects to be queued for freeing.
*
* This could be expanded to allow incremental freeing: just bail out
* early and resume at a future alloc/decref/refzero.
*/
DUK_LOCAL void duk__refzero_free_pending(duk_hthread *thr) {
duk_heaphdr *h1, *h2;
duk_heap *heap;
duk_int_t count = 0;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
heap = thr->heap;
DUK_ASSERT(heap != NULL);
/*
* Detect recursive invocation
*/
if (DUK_HEAP_HAS_REFZERO_FREE_RUNNING(heap)) {
DUK_DDD(DUK_DDDPRINT("refzero free running, skip run"));
return;
}
/*
* Churn refzero_list until empty
*/
DUK_HEAP_SET_REFZERO_FREE_RUNNING(heap);
while (heap->refzero_list) {
duk_hobject *obj;
duk_bool_t rescued = 0;
/*
* Pick an object from the head (don't remove yet).
*/
h1 = heap->refzero_list;
obj = (duk_hobject *) h1;
DUK_DD(DUK_DDPRINT("refzero processing %p: %!O", (void *) h1, (duk_heaphdr *) h1));
DUK_ASSERT(DUK_HEAPHDR_GET_PREV(heap, h1) == NULL);
DUK_ASSERT(DUK_HEAPHDR_GET_TYPE(h1) == DUK_HTYPE_OBJECT); /* currently, always the case */
#if defined(DUK_USE_REFZERO_FINALIZER_TORTURE)
/* Torture option to shake out finalizer side effect issues:
* make a bogus function call for every finalizable object,
* essentially simulating the case where everything has a
* finalizer.
*/
DUK_DD(DUK_DDPRINT("refzero torture enabled, fake finalizer"));
DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(h1) == 0);
DUK_HEAPHDR_PREINC_REFCOUNT(h1); /* bump refcount to prevent refzero during finalizer processing */
duk__refcount_run_torture_finalizer(thr, obj); /* must never longjmp */
DUK_HEAPHDR_PREDEC_REFCOUNT(h1); /* remove artificial bump */
DUK_ASSERT_DISABLE(h1->h_refcount >= 0); /* refcount is unsigned, so always true */
#endif
/*
* Finalizer check.
*
* Note: running a finalizer may have arbitrary side effects, e.g.
* queue more objects on refzero_list (tail), or even trigger a
* mark-and-sweep.
*
* Note: quick reject check should match vast majority of
* objects and must be safe (not throw any errors, ever).
*/
/* An object may have FINALIZED here if it was finalized by mark-and-sweep
* on a previous run and refcount then decreased to zero. We won't run the
* finalizer again here.
*/
/* A finalizer is looked up from the object and up its prototype chain
* (which allows inherited finalizers).
*/
if (duk_hobject_hasprop_raw(thr, obj, DUK_HTHREAD_STRING_INT_FINALIZER(thr))) {
DUK_DDD(DUK_DDDPRINT("object has a finalizer, run it"));
DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(h1) == 0);
DUK_HEAPHDR_PREINC_REFCOUNT(h1); /* bump refcount to prevent refzero during finalizer processing */
duk_hobject_run_finalizer(thr, obj); /* must never longjmp */
DUK_ASSERT(DUK_HEAPHDR_HAS_FINALIZED(h1)); /* duk_hobject_run_finalizer() sets */
DUK_HEAPHDR_PREDEC_REFCOUNT(h1); /* remove artificial bump */
DUK_ASSERT_DISABLE(h1->h_refcount >= 0); /* refcount is unsigned, so always true */
if (DUK_HEAPHDR_GET_REFCOUNT(h1) != 0) {
DUK_DDD(DUK_DDDPRINT("-> object refcount after finalization non-zero, object will be rescued"));
rescued = 1;
} else {
DUK_DDD(DUK_DDDPRINT("-> object refcount still zero after finalization, object will be freed"));
}
}
/* Refzero head is still the same. This is the case even if finalizer
* inserted more refzero objects; they are inserted to the tail.
*/
DUK_ASSERT(h1 == heap->refzero_list);
/*
* Remove the object from the refzero list. This cannot be done
* before a possible finalizer has been executed; the finalizer
* may trigger a mark-and-sweep, and mark-and-sweep must be able
* to traverse a complete refzero_list.
*/
h2 = DUK_HEAPHDR_GET_NEXT(heap, h1);
if (h2) {
DUK_HEAPHDR_SET_PREV(heap, h2, NULL); /* not strictly necessary */
heap->refzero_list = h2;
} else {
heap->refzero_list = NULL;
heap->refzero_list_tail = NULL;
}
/*
* Rescue or free.
*/
if (rescued) {
/* yes -> move back to heap allocated */
DUK_DD(DUK_DDPRINT("object rescued during refcount finalization: %p", (void *) h1));
DUK_ASSERT(!DUK_HEAPHDR_HAS_FINALIZABLE(h1));
DUK_ASSERT(DUK_HEAPHDR_HAS_FINALIZED(h1));
DUK_HEAPHDR_CLEAR_FINALIZED(h1);
h2 = heap->heap_allocated;
DUK_HEAPHDR_SET_PREV(heap, h1, NULL);
if (h2) {
DUK_HEAPHDR_SET_PREV(heap, h2, h1);
}
DUK_HEAPHDR_SET_NEXT(heap, h1, h2);
DUK_ASSERT_HEAPHDR_LINKS(heap, h1);
DUK_ASSERT_HEAPHDR_LINKS(heap, h2);
heap->heap_allocated = h1;
} else {
/* no -> decref members, then free */
duk__refcount_finalize_hobject(thr, obj);
duk_heap_free_heaphdr_raw(heap, h1);
}
count++;
}
DUK_HEAP_CLEAR_REFZERO_FREE_RUNNING(heap);
DUK_DDD(DUK_DDDPRINT("refzero processed %ld objects", (long) count));
/*
* Once the whole refzero cascade has been freed, check for
* a voluntary mark-and-sweep.
*/
#if defined(DUK_USE_MARK_AND_SWEEP) && defined(DUK_USE_VOLUNTARY_GC)
/* 'count' is more or less comparable to normal trigger counter update
* which happens in memory block (re)allocation.
*/
heap->mark_and_sweep_trigger_counter -= count;
if (heap->mark_and_sweep_trigger_counter <= 0) {
duk_bool_t rc;
duk_small_uint_t flags = 0; /* not emergency */
DUK_D(DUK_DPRINT("refcount triggering mark-and-sweep"));
rc = duk_heap_mark_and_sweep(heap, flags);
DUK_UNREF(rc);
DUK_D(DUK_DPRINT("refcount triggered mark-and-sweep => rc %ld", (long) rc));
}
#endif /* DUK_USE_MARK_AND_SWEEP && DUK_USE_VOLUNTARY_GC */
}
/*
* Incref and decref functions.
*
* Decref may trigger immediate refzero handling, which may free and finalize
* an arbitrary number of objects.
*
*/
DUK_INTERNAL void duk_heaphdr_refzero(duk_hthread *thr, duk_heaphdr *h) {
duk_heap *heap;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(h != NULL);
heap = thr->heap;
DUK_DDD(DUK_DDDPRINT("refzero %p: %!O", (void *) h, (duk_heaphdr *) h));
/*
* Refzero handling is skipped entirely if (1) mark-and-sweep is
* running or (2) execution is paused in the debugger. The objects
* are left in the heap, and will be freed by mark-and-sweep or
* eventual heap destruction.
*
* This is necessary during mark-and-sweep because refcounts are also
* updated during the sweep phase (otherwise objects referenced by a
* swept object would have incorrect refcounts) which then calls here.
* This could be avoided by using separate decref macros in
* mark-and-sweep; however, mark-and-sweep also calls finalizers which
* would use the ordinary decref macros anyway and still call this
* function.
*
* This check must be enabled also when mark-and-sweep support has been
* disabled: the flag is also used in heap destruction when running
* finalizers for remaining objects, and the flag prevents objects from
* being moved around in heap linked lists.
*/
/* XXX: ideally this would be just one flag (maybe a derived one) so
* that a single bit test is sufficient to check the condition.
*/
#if defined(DUK_USE_DEBUGGER_SUPPORT)
if (DUK_UNLIKELY(DUK_HEAP_HAS_MARKANDSWEEP_RUNNING(heap) || DUK_HEAP_IS_PAUSED(heap))) {
#else
if (DUK_UNLIKELY(DUK_HEAP_HAS_MARKANDSWEEP_RUNNING(heap))) {
#endif
DUK_DDD(DUK_DDDPRINT("refzero handling suppressed when mark-and-sweep running, object: %p", (void *) h));
return;
}
switch ((duk_small_int_t) DUK_HEAPHDR_GET_TYPE(h)) {
case DUK_HTYPE_STRING:
/*
* Strings have no internal references but do have "weak"
* references in the string cache. Also note that strings
* are not on the heap_allocated list like other heap
* elements.
*/
duk_heap_strcache_string_remove(heap, (duk_hstring *) h);
duk_heap_string_remove(heap, (duk_hstring *) h);
duk_heap_free_heaphdr_raw(heap, h);
break;
case DUK_HTYPE_OBJECT:
/*
* Objects have internal references. Must finalize through
* the "refzero" work list.
*/
duk_heap_remove_any_from_heap_allocated(heap, h);
duk__queue_refzero(heap, h);
duk__refzero_free_pending(thr);
break;
case DUK_HTYPE_BUFFER:
/*
* Buffers have no internal references. However, a dynamic
* buffer has a separate allocation for the buffer. This is
* freed by duk_heap_free_heaphdr_raw().
*/
duk_heap_remove_any_from_heap_allocated(heap, h);
duk_heap_free_heaphdr_raw(heap, h);
break;
default:
DUK_D(DUK_DPRINT("invalid heap type in decref: %ld", (long) DUK_HEAPHDR_GET_TYPE(h)));
DUK_UNREACHABLE();
}
}
#if !defined(DUK_USE_FAST_REFCOUNT_DEFAULT)
DUK_INTERNAL void duk_tval_incref(duk_tval *tv) {
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv)) {
duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT_DISABLE(h->h_refcount >= 0);
DUK_HEAPHDR_PREINC_REFCOUNT(h);
}
}
#endif
#if 0 /* unused */
DUK_INTERNAL void duk_tval_incref_allownull(duk_tval *tv) {
if (tv == NULL) {
return;
}
if (DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv)) {
duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT_DISABLE(h->h_refcount >= 0);
DUK_HEAPHDR_PREINC_REFCOUNT(h);
}
}
#endif
DUK_INTERNAL void duk_tval_decref(duk_hthread *thr, duk_tval *tv) {
DUK_ASSERT(thr != NULL);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv)) {
duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
duk_heaphdr_decref(thr, h);
}
}
#if 0 /* unused */
DUK_INTERNAL void duk_tval_decref_allownull(duk_hthread *thr, duk_tval *tv) {
DUK_ASSERT(thr != NULL);
if (tv == NULL) {
return;
}
if (DUK_TVAL_NEEDS_REFCOUNT_UPDATE(tv)) {
duk_heaphdr *h = DUK_TVAL_GET_HEAPHDR(tv);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
duk_heaphdr_decref(thr, h);
}
}
#endif
#if !defined(DUK_USE_FAST_REFCOUNT_DEFAULT)
DUK_INTERNAL void duk_heaphdr_incref(duk_heaphdr *h) {
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT_DISABLE(DUK_HEAPHDR_GET_REFCOUNT(h) >= 0);
DUK_HEAPHDR_PREINC_REFCOUNT(h);
}
#endif
#if 0 /* unused */
DUK_INTERNAL void duk_heaphdr_incref_allownull(duk_heaphdr *h) {
if (h == NULL) {
return;
}
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT_DISABLE(DUK_HEAPHDR_GET_REFCOUNT(h) >= 0);
DUK_HEAPHDR_PREINC_REFCOUNT(h);
}
#endif
DUK_INTERNAL void duk_heaphdr_decref(duk_hthread *thr, duk_heaphdr *h) {
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(h) >= 1);
#if defined(DUK_USE_ROM_OBJECTS)
if (DUK_HEAPHDR_HAS_READONLY(h)) {
return;
}
#endif
if (DUK_HEAPHDR_PREDEC_REFCOUNT(h) != 0) {
return;
}
duk_heaphdr_refzero(thr, h);
}
DUK_INTERNAL void duk_heaphdr_decref_allownull(duk_hthread *thr, duk_heaphdr *h) {
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
if (h == NULL) {
return;
}
DUK_ASSERT(DUK_HEAPHDR_HTYPE_VALID(h));
#if defined(DUK_USE_ROM_OBJECTS)
if (DUK_HEAPHDR_HAS_READONLY(h)) {
return;
}
#endif
DUK_ASSERT(DUK_HEAPHDR_GET_REFCOUNT(h) >= 1);
if (DUK_HEAPHDR_PREDEC_REFCOUNT(h) != 0) {
return;
}
duk_heaphdr_refzero(thr, h);
}
#else
/* no refcounting */
#endif /* DUK_USE_REFERENCE_COUNTING */
#line 1 "duk_heap_stringcache.c"
/*
* String cache.
*
* Provides a cache to optimize indexed string lookups. The cache keeps
* track of (byte offset, char offset) states for a fixed number of strings.
* Otherwise we'd need to scan from either end of the string, as we store
* strings in (extended) UTF-8.
*/
/* include removed: duk_internal.h */
/*
* Delete references to given hstring from the heap string cache.
*
* String cache references are 'weak': they are not counted towards
* reference counts, nor serve as roots for mark-and-sweep. When an
* object is about to be freed, such references need to be removed.
*/
DUK_INTERNAL void duk_heap_strcache_string_remove(duk_heap *heap, duk_hstring *h) {
duk_small_int_t i;
for (i = 0; i < DUK_HEAP_STRCACHE_SIZE; i++) {
duk_strcache *c = heap->strcache + i;
if (c->h == h) {
DUK_DD(DUK_DDPRINT("deleting weak strcache reference to hstring %p from heap %p",
(void *) h, (void *) heap));
c->h = NULL;
/* XXX: the string shouldn't appear twice, but we now loop to the
* end anyway; if fixed, add a looping assertion to ensure there
* is no duplicate.
*/
}
}
}
/*
* String scanning helpers
*
* All bytes other than UTF-8 continuation bytes ([0x80,0xbf]) are
* considered to contribute a character. This must match how string
* character length is computed.
*/
DUK_LOCAL const duk_uint8_t *duk__scan_forwards(const duk_uint8_t *p, const duk_uint8_t *q, duk_uint_fast32_t n) {
while (n > 0) {
for (;;) {
p++;
if (p >= q) {
return NULL;
}
if ((*p & 0xc0) != 0x80) {
break;
}
}
n--;
}
return p;
}
DUK_LOCAL const duk_uint8_t *duk__scan_backwards(const duk_uint8_t *p, const duk_uint8_t *q, duk_uint_fast32_t n) {
while (n > 0) {
for (;;) {
p--;
if (p < q) {
return NULL;
}
if ((*p & 0xc0) != 0x80) {
break;
}
}
n--;
}
return p;
}
/*
* Convert char offset to byte offset
*
* Avoid using the string cache if possible: for ASCII strings byte and
* char offsets are equal and for short strings direct scanning may be
* better than using the string cache (which may evict a more important
* entry).
*
* Typing now assumes 32-bit string byte/char offsets (duk_uint_fast32_t).
* Better typing might be to use duk_size_t.
*/
DUK_INTERNAL duk_uint_fast32_t duk_heap_strcache_offset_char2byte(duk_hthread *thr, duk_hstring *h, duk_uint_fast32_t char_offset) {
duk_heap *heap;
duk_strcache *sce;
duk_uint_fast32_t byte_offset;
duk_small_int_t i;
duk_bool_t use_cache;
duk_uint_fast32_t dist_start, dist_end, dist_sce;
const duk_uint8_t *p_start;
const duk_uint8_t *p_end;
const duk_uint8_t *p_found;
if (char_offset > DUK_HSTRING_GET_CHARLEN(h)) {
goto error;
}
/*
* For ASCII strings, the answer is simple.
*/
if (DUK_HSTRING_IS_ASCII(h)) {
/* clen == blen -> pure ascii */
return char_offset;
}
/*
* For non-ASCII strings, we need to scan forwards or backwards
* from some starting point. The starting point may be the start
* or end of the string, or some cached midpoint in the string
* cache.
*
* For "short" strings we simply scan without checking or updating
* the cache. For longer strings we check and update the cache as
* necessary, inserting a new cache entry if none exists.
*/
DUK_DDD(DUK_DDDPRINT("non-ascii string %p, char_offset=%ld, clen=%ld, blen=%ld",
(void *) h, (long) char_offset,
(long) DUK_HSTRING_GET_CHARLEN(h),
(long) DUK_HSTRING_GET_BYTELEN(h)));
heap = thr->heap;
sce = NULL;
use_cache = (DUK_HSTRING_GET_CHARLEN(h) > DUK_HEAP_STRINGCACHE_NOCACHE_LIMIT);
if (use_cache) {
#ifdef DUK_USE_DDDPRINT
DUK_DDD(DUK_DDDPRINT("stringcache before char2byte (using cache):"));
for (i = 0; i < DUK_HEAP_STRCACHE_SIZE; i++) {
duk_strcache *c = heap->strcache + i;
DUK_DDD(DUK_DDDPRINT(" [%ld] -> h=%p, cidx=%ld, bidx=%ld",
(long) i, (void *) c->h, (long) c->cidx, (long) c->bidx));
}
#endif
for (i = 0; i < DUK_HEAP_STRCACHE_SIZE; i++) {
duk_strcache *c = heap->strcache + i;
if (c->h == h) {
sce = c;
break;
}
}
}
/*
* Scan from shortest distance:
* - start of string
* - end of string
* - cache entry (if exists)
*/
DUK_ASSERT(DUK_HSTRING_GET_CHARLEN(h) >= char_offset);
dist_start = char_offset;
dist_end = DUK_HSTRING_GET_CHARLEN(h) - char_offset;
dist_sce = 0; DUK_UNREF(dist_sce); /* initialize for debug prints, needed if sce==NULL */
p_start = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h);
p_end = (const duk_uint8_t *) (p_start + DUK_HSTRING_GET_BYTELEN(h));
p_found = NULL;
if (sce) {
if (char_offset >= sce->cidx) {
dist_sce = char_offset - sce->cidx;
if ((dist_sce <= dist_start) && (dist_sce <= dist_end)) {
DUK_DDD(DUK_DDDPRINT("non-ascii string, use_cache=%ld, sce=%p:%ld:%ld, "
"dist_start=%ld, dist_end=%ld, dist_sce=%ld => "
"scan forwards from sce",
(long) use_cache, (void *) (sce ? sce->h : NULL),
(sce ? (long) sce->cidx : (long) -1),
(sce ? (long) sce->bidx : (long) -1),
(long) dist_start, (long) dist_end, (long) dist_sce));
p_found = duk__scan_forwards(p_start + sce->bidx,
p_end,
dist_sce);
goto scan_done;
}
} else {
dist_sce = sce->cidx - char_offset;
if ((dist_sce <= dist_start) && (dist_sce <= dist_end)) {
DUK_DDD(DUK_DDDPRINT("non-ascii string, use_cache=%ld, sce=%p:%ld:%ld, "
"dist_start=%ld, dist_end=%ld, dist_sce=%ld => "
"scan backwards from sce",
(long) use_cache, (void *) (sce ? sce->h : NULL),
(sce ? (long) sce->cidx : (long) -1),
(sce ? (long) sce->bidx : (long) -1),
(long) dist_start, (long) dist_end, (long) dist_sce));
p_found = duk__scan_backwards(p_start + sce->bidx,
p_start,
dist_sce);
goto scan_done;
}
}
}
/* no sce, or sce scan not best */
if (dist_start <= dist_end) {
DUK_DDD(DUK_DDDPRINT("non-ascii string, use_cache=%ld, sce=%p:%ld:%ld, "
"dist_start=%ld, dist_end=%ld, dist_sce=%ld => "
"scan forwards from string start",
(long) use_cache, (void *) (sce ? sce->h : NULL),
(sce ? (long) sce->cidx : (long) -1),
(sce ? (long) sce->bidx : (long) -1),
(long) dist_start, (long) dist_end, (long) dist_sce));
p_found = duk__scan_forwards(p_start,
p_end,
dist_start);
} else {
DUK_DDD(DUK_DDDPRINT("non-ascii string, use_cache=%ld, sce=%p:%ld:%ld, "
"dist_start=%ld, dist_end=%ld, dist_sce=%ld => "
"scan backwards from string end",
(long) use_cache, (void *) (sce ? sce->h : NULL),
(sce ? (long) sce->cidx : (long) -1),
(sce ? (long) sce->bidx : (long) -1),
(long) dist_start, (long) dist_end, (long) dist_sce));
p_found = duk__scan_backwards(p_end,
p_start,
dist_end);
}
scan_done:
if (!p_found) {
/* Scan error: this shouldn't normally happen; it could happen if
* string is not valid UTF-8 data, and clen/blen are not consistent
* with the scanning algorithm.
*/
goto error;
}
DUK_ASSERT(p_found >= p_start);
DUK_ASSERT(p_found <= p_end); /* may be equal */
byte_offset = (duk_uint32_t) (p_found - p_start);
DUK_DDD(DUK_DDDPRINT("-> string %p, cidx %ld -> bidx %ld",
(void *) h, (long) char_offset, (long) byte_offset));
/*
* Update cache entry (allocating if necessary), and move the
* cache entry to the first place (in an "LRU" policy).
*/
if (use_cache) {
/* update entry, allocating if necessary */
if (!sce) {
sce = heap->strcache + DUK_HEAP_STRCACHE_SIZE - 1; /* take last entry */
sce->h = h;
}
DUK_ASSERT(sce != NULL);
sce->bidx = (duk_uint32_t) (p_found - p_start);
sce->cidx = (duk_uint32_t) char_offset;
/* LRU: move our entry to first */
if (sce > &heap->strcache[0]) {
/*
* A C
* B A
* C <- sce ==> B
* D D
*/
duk_strcache tmp;
tmp = *sce;
DUK_MEMMOVE((void *) (&heap->strcache[1]),
(const void *) (&heap->strcache[0]),
(size_t) (((char *) sce) - ((char *) &heap->strcache[0])));
heap->strcache[0] = tmp;
/* 'sce' points to the wrong entry here, but is no longer used */
}
#ifdef DUK_USE_DDDPRINT
DUK_DDD(DUK_DDDPRINT("stringcache after char2byte (using cache):"));
for (i = 0; i < DUK_HEAP_STRCACHE_SIZE; i++) {
duk_strcache *c = heap->strcache + i;
DUK_DDD(DUK_DDDPRINT(" [%ld] -> h=%p, cidx=%ld, bidx=%ld",
(long) i, (void *) c->h, (long) c->cidx, (long) c->bidx));
}
#endif
}
return byte_offset;
error:
DUK_ERROR_INTERNAL_DEFMSG(thr);
return 0;
}
#line 1 "duk_heap_stringtable.c"
/*
* Heap stringtable handling, string interning.
*/
/* include removed: duk_internal.h */
#if defined(DUK_USE_STRTAB_PROBE)
#define DUK__HASH_INITIAL(hash,h_size) DUK_STRTAB_HASH_INITIAL((hash),(h_size))
#define DUK__HASH_PROBE_STEP(hash) DUK_STRTAB_HASH_PROBE_STEP((hash))
#define DUK__DELETED_MARKER(heap) DUK_STRTAB_DELETED_MARKER((heap))
#endif
#if defined(DUK_USE_MARK_AND_SWEEP)
#define DUK__PREVENT_MS_SIDE_EFFECTS(heap) do { \
(heap)->mark_and_sweep_base_flags |= \
DUK_MS_FLAG_NO_STRINGTABLE_RESIZE | /* avoid recursive string table call */ \
DUK_MS_FLAG_NO_FINALIZERS | /* avoid pressure to add/remove strings, invalidation of call data argument, etc. */ \
DUK_MS_FLAG_NO_OBJECT_COMPACTION; /* avoid array abandoning which interns strings */ \
} while (0)
#endif
/*
* Create a hstring and insert into the heap. The created object
* is directly garbage collectable with reference count zero.
*
* The caller must place the interned string into the stringtable
* immediately (without chance of a longjmp); otherwise the string
* is lost.
*/
DUK_LOCAL
duk_hstring *duk__alloc_init_hstring(duk_heap *heap,
const duk_uint8_t *str,
duk_uint32_t blen,
duk_uint32_t strhash,
const duk_uint8_t *extdata) {
duk_hstring *res = NULL;
duk_uint8_t *data;
duk_size_t alloc_size;
duk_uarridx_t dummy;
duk_uint32_t clen;
#if defined(DUK_USE_STRLEN16)
/* If blen <= 0xffffUL, clen is also guaranteed to be <= 0xffffUL. */
if (blen > 0xffffUL) {
DUK_D(DUK_DPRINT("16-bit string blen/clen active and blen over 16 bits, reject intern"));
return NULL;
}
#endif
if (extdata) {
alloc_size = (duk_size_t) sizeof(duk_hstring_external);
res = (duk_hstring *) DUK_ALLOC(heap, alloc_size);
if (!res) {
goto alloc_error;
}
DUK_MEMZERO(res, sizeof(duk_hstring_external));
#if defined(DUK_USE_EXPLICIT_NULL_INIT)
DUK_HEAPHDR_STRING_INIT_NULLS(&res->hdr);
#endif
DUK_HEAPHDR_SET_TYPE_AND_FLAGS(&res->hdr, DUK_HTYPE_STRING, DUK_HSTRING_FLAG_EXTDATA);
((duk_hstring_external *) res)->extdata = extdata;
} else {
/* NUL terminate for convenient C access */
alloc_size = (duk_size_t) (sizeof(duk_hstring) + blen + 1);
res = (duk_hstring *) DUK_ALLOC(heap, alloc_size);
if (!res) {
goto alloc_error;
}
DUK_MEMZERO(res, sizeof(duk_hstring));
#if defined(DUK_USE_EXPLICIT_NULL_INIT)
DUK_HEAPHDR_STRING_INIT_NULLS(&res->hdr);
#endif
DUK_HEAPHDR_SET_TYPE_AND_FLAGS(&res->hdr, DUK_HTYPE_STRING, 0);
data = (duk_uint8_t *) (res + 1);
DUK_MEMCPY(data, str, blen);
data[blen] = (duk_uint8_t) 0;
}
DUK_ASSERT(!DUK_HSTRING_HAS_ARRIDX(res));
if (duk_js_to_arrayindex_raw_string(str, blen, &dummy)) {
DUK_HSTRING_SET_ARRIDX(res);
}
/* All strings beginning with 0xff are treated as "internal",
* even strings interned by the user. This allows user code to
* create internal properties too, and makes behavior consistent
* in case user code happens to use a string also used by Duktape
* (such as string has already been interned and has the 'internal'
* flag set).
*/
DUK_ASSERT(!DUK_HSTRING_HAS_INTERNAL(res));
if (blen > 0 && str[0] == (duk_uint8_t) 0xff) {
DUK_HSTRING_SET_INTERNAL(res);
}
DUK_HSTRING_SET_HASH(res, strhash);
DUK_HSTRING_SET_BYTELEN(res, blen);
clen = (duk_uint32_t) duk_unicode_unvalidated_utf8_length(str, (duk_size_t) blen);
DUK_ASSERT(clen <= blen);
#if defined(DUK_USE_HSTRING_CLEN)
DUK_HSTRING_SET_CHARLEN(res, clen);
#endif
/* Using an explicit 'ASCII' flag has larger footprint (one call site
* only) but is quite useful for the case when there's no explicit
* 'clen' in duk_hstring.
*/
DUK_ASSERT(!DUK_HSTRING_HAS_ASCII(res));
if (clen == blen) {
DUK_HSTRING_SET_ASCII(res);
}
DUK_DDD(DUK_DDDPRINT("interned string, hash=0x%08lx, blen=%ld, clen=%ld, has_arridx=%ld, has_extdata=%ld",
(unsigned long) DUK_HSTRING_GET_HASH(res),
(long) DUK_HSTRING_GET_BYTELEN(res),
(long) DUK_HSTRING_GET_CHARLEN(res),
(long) (DUK_HSTRING_HAS_ARRIDX(res) ? 1 : 0),
(long) (DUK_HSTRING_HAS_EXTDATA(res) ? 1 : 0)));
return res;
alloc_error:
DUK_FREE(heap, res);
return NULL;
}
/*
* String table algorithm: fixed size string table with array chaining
*
* The top level string table has a fixed size, with each slot holding
* either NULL, string pointer, or pointer to a separately allocated
* string pointer list.
*
* This is good for low memory environments using a pool allocator: the
* top level allocation has a fixed size and the pointer lists have quite
* small allocation size, which further matches the typical pool sizes
* needed by objects, strings, property tables, etc.
*/
#if defined(DUK_USE_STRTAB_CHAIN)
#if defined(DUK_USE_HEAPPTR16)
DUK_LOCAL duk_bool_t duk__insert_hstring_chain(duk_heap *heap, duk_hstring *h) {
duk_small_uint_t slotidx;
duk_strtab_entry *e;
duk_uint16_t *lst;
duk_uint16_t *new_lst;
duk_size_t i, n;
duk_uint16_t null16 = heap->heapptr_null16;
duk_uint16_t h16 = DUK_USE_HEAPPTR_ENC16(heap->heap_udata, (void *) h);
DUK_ASSERT(heap != NULL);
DUK_ASSERT(h != NULL);
slotidx = DUK_HSTRING_GET_HASH(h) % DUK_STRTAB_CHAIN_SIZE;
DUK_ASSERT(slotidx < DUK_STRTAB_CHAIN_SIZE);
e = heap->strtable + slotidx;
if (e->listlen == 0) {
if (e->u.str16 == null16) {
e->u.str16 = h16;
} else {
/* Now two entries in the same slot, alloc list */
lst = (duk_uint16_t *) DUK_ALLOC(heap, sizeof(duk_uint16_t) * 2);
if (lst == NULL) {
return 1; /* fail */
}
lst[0] = e->u.str16;
lst[1] = h16;
e->u.strlist16 = DUK_USE_HEAPPTR_ENC16(heap->heap_udata, (void *) lst);
e->listlen = 2;
}
} else {
DUK_ASSERT(e->u.strlist16 != null16);
lst = (duk_uint16_t *) DUK_USE_HEAPPTR_DEC16(heap->heap_udata, e->u.strlist16);
DUK_ASSERT(lst != NULL);
for (i = 0, n = e->listlen; i < n; i++) {
if (lst[i] == null16) {
lst[i] = h16;
return 0;
}
}
if (e->listlen + 1 == 0) {
/* Overflow, relevant mainly when listlen is 16 bits. */
return 1; /* fail */
}
new_lst = (duk_uint16_t *) DUK_REALLOC(heap, lst, sizeof(duk_uint16_t) * (e->listlen + 1));
if (new_lst == NULL) {
return 1; /* fail */
}
new_lst[e->listlen++] = h16;
e->u.strlist16 = DUK_USE_HEAPPTR_ENC16(heap->heap_udata, (void *) new_lst);
}
return 0;
}
#else /* DUK_USE_HEAPPTR16 */
DUK_LOCAL duk_bool_t duk__insert_hstring_chain(duk_heap *heap, duk_hstring *h) {
duk_small_uint_t slotidx;
duk_strtab_entry *e;
duk_hstring **lst;
duk_hstring **new_lst;
duk_size_t i, n;
DUK_ASSERT(heap != NULL);
DUK_ASSERT(h != NULL);
slotidx = DUK_HSTRING_GET_HASH(h) % DUK_STRTAB_CHAIN_SIZE;
DUK_ASSERT(slotidx < DUK_STRTAB_CHAIN_SIZE);
e = heap->strtable + slotidx;
if (e->listlen == 0) {
if (e->u.str == NULL) {
e->u.str = h;
} else {
/* Now two entries in the same slot, alloc list */
lst = (duk_hstring **) DUK_ALLOC(heap, sizeof(duk_hstring *) * 2);
if (lst == NULL) {
return 1; /* fail */
}
lst[0] = e->u.str;
lst[1] = h;
e->u.strlist = lst;
e->listlen = 2;
}
} else {
DUK_ASSERT(e->u.strlist != NULL);
lst = e->u.strlist;
for (i = 0, n = e->listlen; i < n; i++) {
if (lst[i] == NULL) {
lst[i] = h;
return 0;
}
}
if (e->listlen + 1 == 0) {
/* Overflow, relevant mainly when listlen is 16 bits. */
return 1; /* fail */
}
new_lst = (duk_hstring **) DUK_REALLOC(heap, e->u.strlist, sizeof(duk_hstring *) * (e->listlen + 1));
if (new_lst == NULL) {
return 1; /* fail */
}
new_lst[e->listlen++] = h;
e->u.strlist = new_lst;
}
return 0;
}
#endif /* DUK_USE_HEAPPTR16 */
#if defined(DUK_USE_HEAPPTR16)
DUK_LOCAL duk_hstring *duk__find_matching_string_chain(duk_heap *heap, const duk_uint8_t *str, duk_uint32_t blen, duk_uint32_t strhash) {
duk_small_uint_t slotidx;
duk_strtab_entry *e;
duk_uint16_t *lst;
duk_size_t i, n;
duk_uint16_t null16 = heap->heapptr_null16;
DUK_ASSERT(heap != NULL);
slotidx = strhash % DUK_STRTAB_CHAIN_SIZE;
DUK_ASSERT(slotidx < DUK_STRTAB_CHAIN_SIZE);
e = heap->strtable + slotidx;
if (e->listlen == 0) {
if (e->u.str16 != null16) {
duk_hstring *h = (duk_hstring *) DUK_USE_HEAPPTR_DEC16(heap->heap_udata, e->u.str16);
DUK_ASSERT(h != NULL);
if (DUK_HSTRING_GET_BYTELEN(h) == blen &&
DUK_MEMCMP((const void *) str, (const void *) DUK_HSTRING_GET_DATA(h), (size_t) blen) == 0) {
return h;
}
}
} else {
DUK_ASSERT(e->u.strlist16 != null16);
lst = (duk_uint16_t *) DUK_USE_HEAPPTR_DEC16(heap->heap_udata, e->u.strlist16);
DUK_ASSERT(lst != NULL);
for (i = 0, n = e->listlen; i < n; i++) {
if (lst[i] != null16) {
duk_hstring *h = (duk_hstring *) DUK_USE_HEAPPTR_DEC16(heap->heap_udata, lst[i]);
DUK_ASSERT(h != NULL);
if (DUK_HSTRING_GET_BYTELEN(h) == blen &&
DUK_MEMCMP((const void *) str, (const void *) DUK_HSTRING_GET_DATA(h), (size_t) blen) == 0) {
return h;
}
}
}
}
return NULL;
}
#else /* DUK_USE_HEAPPTR16 */
DUK_LOCAL duk_hstring *duk__find_matching_string_chain(duk_heap *heap, const duk_uint8_t *str, duk_uint32_t blen, duk_uint32_t strhash) {
duk_small_uint_t slotidx;
duk_strtab_entry *e;
duk_hstring **lst;
duk_size_t i, n;
DUK_ASSERT(heap != NULL);
slotidx = strhash % DUK_STRTAB_CHAIN_SIZE;
DUK_ASSERT(slotidx < DUK_STRTAB_CHAIN_SIZE);
e = heap->strtable + slotidx;
if (e->listlen == 0) {
if (e->u.str != NULL &&
DUK_HSTRING_GET_BYTELEN(e->u.str) == blen &&
DUK_MEMCMP((const void *) str, (const void *) DUK_HSTRING_GET_DATA(e->u.str), (size_t) blen) == 0) {
return e->u.str;
}
} else {
DUK_ASSERT(e->u.strlist != NULL);
lst = e->u.strlist;
for (i = 0, n = e->listlen; i < n; i++) {
if (lst[i] != NULL &&
DUK_HSTRING_GET_BYTELEN(lst[i]) == blen &&
DUK_MEMCMP((const void *) str, (const void *) DUK_HSTRING_GET_DATA(lst[i]), (size_t) blen) == 0) {
return lst[i];
}
}
}
return NULL;
}
#endif /* DUK_USE_HEAPPTR16 */
#if defined(DUK_USE_HEAPPTR16)
DUK_LOCAL void duk__remove_matching_hstring_chain(duk_heap *heap, duk_hstring *h) {
duk_small_uint_t slotidx;
duk_strtab_entry *e;
duk_uint16_t *lst;
duk_size_t i, n;
duk_uint16_t h16;
duk_uint16_t null16 = heap->heapptr_null16;
DUK_ASSERT(heap != NULL);
DUK_ASSERT(h != NULL);
slotidx = DUK_HSTRING_GET_HASH(h) % DUK_STRTAB_CHAIN_SIZE;
DUK_ASSERT(slotidx < DUK_STRTAB_CHAIN_SIZE);
DUK_ASSERT(h != NULL);
h16 = DUK_USE_HEAPPTR_ENC16(heap->heap_udata, (void *) h);
e = heap->strtable + slotidx;
if (e->listlen == 0) {
if (e->u.str16 == h16) {
e->u.str16 = null16;
return;
}
} else {
DUK_ASSERT(e->u.strlist16 != null16);
lst = (duk_uint16_t *) DUK_USE_HEAPPTR_DEC16(heap->heap_udata, e->u.strlist16);
DUK_ASSERT(lst != NULL);
for (i = 0, n = e->listlen; i < n; i++) {
if (lst[i] == h16) {
lst[i] = null16;
return;
}
}
}
DUK_D(DUK_DPRINT("failed to find string that should be in stringtable"));
DUK_UNREACHABLE();
return;
}
#else /* DUK_USE_HEAPPTR16 */
DUK_LOCAL void duk__remove_matching_hstring_chain(duk_heap *heap, duk_hstring *h) {
duk_small_uint_t slotidx;
duk_strtab_entry *e;
duk_hstring **lst;
duk_size_t i, n;
DUK_ASSERT(heap != NULL);
DUK_ASSERT(h != NULL);
slotidx = DUK_HSTRING_GET_HASH(h) % DUK_STRTAB_CHAIN_SIZE;
DUK_ASSERT(slotidx < DUK_STRTAB_CHAIN_SIZE);
e = heap->strtable + slotidx;
if (e->listlen == 0) {
DUK_ASSERT(h != NULL);
if (e->u.str == h) {
e->u.str = NULL;
return;
}
} else {
DUK_ASSERT(e->u.strlist != NULL);
lst = e->u.strlist;
for (i = 0, n = e->listlen; i < n; i++) {
DUK_ASSERT(h != NULL);
if (lst[i] == h) {
lst[i] = NULL;
return;
}
}
}
DUK_D(DUK_DPRINT("failed to find string that should be in stringtable"));
DUK_UNREACHABLE();
return;
}
#endif /* DUK_USE_HEAPPTR16 */
#if defined(DUK_USE_DEBUG)
DUK_INTERNAL void duk_heap_dump_strtab(duk_heap *heap) {
duk_strtab_entry *e;
duk_small_uint_t i;
duk_size_t j, n, used;
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t *lst;
duk_uint16_t null16 = heap->heapptr_null16;
#else
duk_hstring **lst;
#endif
DUK_ASSERT(heap != NULL);
for (i = 0; i < DUK_STRTAB_CHAIN_SIZE; i++) {
e = heap->strtable + i;
if (e->listlen == 0) {
#if defined(DUK_USE_HEAPPTR16)
DUK_DD(DUK_DDPRINT("[%03d] -> plain %d", (int) i, (int) (e->u.str16 != null16 ? 1 : 0)));
#else
DUK_DD(DUK_DDPRINT("[%03d] -> plain %d", (int) i, (int) (e->u.str ? 1 : 0)));
#endif
} else {
used = 0;
#if defined(DUK_USE_HEAPPTR16)
lst = (duk_uint16_t *) DUK_USE_HEAPPTR_DEC16(heap->heap_udata, e->u.strlist16);
#else
lst = e->u.strlist;
#endif
DUK_ASSERT(lst != NULL);
for (j = 0, n = e->listlen; j < n; j++) {
#if defined(DUK_USE_HEAPPTR16)
if (lst[j] != null16) {
#else
if (lst[j] != NULL) {
#endif
used++;
}
}
DUK_DD(DUK_DDPRINT("[%03d] -> array %d/%d", (int) i, (int) used, (int) e->listlen));
}
}
}
#endif /* DUK_USE_DEBUG */
#endif /* DUK_USE_STRTAB_CHAIN */
/*
* String table algorithm: closed hashing with a probe sequence
*
* This is the default algorithm and works fine for environments with
* minimal memory constraints.
*/
#if defined(DUK_USE_STRTAB_PROBE)
/* Count actually used (non-NULL, non-DELETED) entries. */
DUK_LOCAL duk_int_t duk__count_used_probe(duk_heap *heap) {
duk_int_t res = 0;
duk_uint_fast32_t i, n;
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t null16 = heap->heapptr_null16;
duk_uint16_t deleted16 = heap->heapptr_deleted16;
#endif
n = (duk_uint_fast32_t) heap->st_size;
for (i = 0; i < n; i++) {
#if defined(DUK_USE_HEAPPTR16)
if (heap->strtable16[i] != null16 && heap->strtable16[i] != deleted16) {
#else
if (heap->strtable[i] != NULL && heap->strtable[i] != DUK__DELETED_MARKER(heap)) {
#endif
res++;
}
}
return res;
}
#if defined(DUK_USE_HEAPPTR16)
DUK_LOCAL void duk__insert_hstring_probe(duk_heap *heap, duk_uint16_t *entries16, duk_uint32_t size, duk_uint32_t *p_used, duk_hstring *h) {
#else
DUK_LOCAL void duk__insert_hstring_probe(duk_heap *heap, duk_hstring **entries, duk_uint32_t size, duk_uint32_t *p_used, duk_hstring *h) {
#endif
duk_uint32_t i;
duk_uint32_t step;
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t null16 = heap->heapptr_null16;
duk_uint16_t deleted16 = heap->heapptr_deleted16;
#endif
DUK_ASSERT(size > 0);
i = DUK__HASH_INITIAL(DUK_HSTRING_GET_HASH(h), size);
step = DUK__HASH_PROBE_STEP(DUK_HSTRING_GET_HASH(h));
for (;;) {
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t e16 = entries16[i];
#else
duk_hstring *e = entries[i];
#endif
#if defined(DUK_USE_HEAPPTR16)
/* XXX: could check for e16 == 0 because NULL is guaranteed to
* encode to zero.
*/
if (e16 == null16) {
#else
if (e == NULL) {
#endif
DUK_DDD(DUK_DDDPRINT("insert hit (null): %ld", (long) i));
#if defined(DUK_USE_HEAPPTR16)
entries16[i] = DUK_USE_HEAPPTR_ENC16(heap->heap_udata, (void *) h);
#else
entries[i] = h;
#endif
(*p_used)++;
break;
#if defined(DUK_USE_HEAPPTR16)
} else if (e16 == deleted16) {
#else
} else if (e == DUK__DELETED_MARKER(heap)) {
#endif
/* st_used remains the same, DELETED is counted as used */
DUK_DDD(DUK_DDDPRINT("insert hit (deleted): %ld", (long) i));
#if defined(DUK_USE_HEAPPTR16)
entries16[i] = DUK_USE_HEAPPTR_ENC16(heap->heap_udata, (void *) h);
#else
entries[i] = h;
#endif
break;
}
DUK_DDD(DUK_DDDPRINT("insert miss: %ld", (long) i));
i = (i + step) % size;
/* looping should never happen */
DUK_ASSERT(i != DUK__HASH_INITIAL(DUK_HSTRING_GET_HASH(h), size));
}
}
#if defined(DUK_USE_HEAPPTR16)
DUK_LOCAL duk_hstring *duk__find_matching_string_probe(duk_heap *heap, duk_uint16_t *entries16, duk_uint32_t size, const duk_uint8_t *str, duk_uint32_t blen, duk_uint32_t strhash) {
#else
DUK_LOCAL duk_hstring *duk__find_matching_string_probe(duk_heap *heap, duk_hstring **entries, duk_uint32_t size, const duk_uint8_t *str, duk_uint32_t blen, duk_uint32_t strhash) {
#endif
duk_uint32_t i;
duk_uint32_t step;
DUK_ASSERT(size > 0);
i = DUK__HASH_INITIAL(strhash, size);
step = DUK__HASH_PROBE_STEP(strhash);
for (;;) {
duk_hstring *e;
#if defined(DUK_USE_HEAPPTR16)
e = (duk_hstring *) DUK_USE_HEAPPTR_DEC16(heap->heap_udata, entries16[i]);
#else
e = entries[i];
#endif
if (!e) {
return NULL;
}
if (e != DUK__DELETED_MARKER(heap) && DUK_HSTRING_GET_BYTELEN(e) == blen) {
if (DUK_MEMCMP((const void *) str, (const void *) DUK_HSTRING_GET_DATA(e), (size_t) blen) == 0) {
DUK_DDD(DUK_DDDPRINT("find matching hit: %ld (step %ld, size %ld)",
(long) i, (long) step, (long) size));
return e;
}
}
DUK_DDD(DUK_DDDPRINT("find matching miss: %ld (step %ld, size %ld)",
(long) i, (long) step, (long) size));
i = (i + step) % size;
/* looping should never happen */
DUK_ASSERT(i != DUK__HASH_INITIAL(strhash, size));
}
DUK_UNREACHABLE();
}
#if defined(DUK_USE_HEAPPTR16)
DUK_LOCAL void duk__remove_matching_hstring_probe(duk_heap *heap, duk_uint16_t *entries16, duk_uint32_t size, duk_hstring *h) {
#else
DUK_LOCAL void duk__remove_matching_hstring_probe(duk_heap *heap, duk_hstring **entries, duk_uint32_t size, duk_hstring *h) {
#endif
duk_uint32_t i;
duk_uint32_t step;
duk_uint32_t hash;
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t null16 = heap->heapptr_null16;
duk_uint16_t h16 = DUK_USE_HEAPPTR_ENC16(heap->heap_udata, (void *) h);
#endif
DUK_ASSERT(size > 0);
hash = DUK_HSTRING_GET_HASH(h);
i = DUK__HASH_INITIAL(hash, size);
step = DUK__HASH_PROBE_STEP(hash);
for (;;) {
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t e16 = entries16[i];
#else
duk_hstring *e = entries[i];
#endif
#if defined(DUK_USE_HEAPPTR16)
if (e16 == null16) {
#else
if (!e) {
#endif
DUK_UNREACHABLE();
break;
}
#if defined(DUK_USE_HEAPPTR16)
if (e16 == h16) {
#else
if (e == h) {
#endif
/* st_used remains the same, DELETED is counted as used */
DUK_DDD(DUK_DDDPRINT("free matching hit: %ld", (long) i));
#if defined(DUK_USE_HEAPPTR16)
entries16[i] = heap->heapptr_deleted16;
#else
entries[i] = DUK__DELETED_MARKER(heap);
#endif
break;
}
DUK_DDD(DUK_DDDPRINT("free matching miss: %ld", (long) i));
i = (i + step) % size;
/* looping should never happen */
DUK_ASSERT(i != DUK__HASH_INITIAL(hash, size));
}
}
DUK_LOCAL duk_bool_t duk__resize_strtab_raw_probe(duk_heap *heap, duk_uint32_t new_size) {
#if defined(DUK_USE_DEBUG)
duk_uint32_t old_used = heap->st_used;
#endif
duk_uint32_t old_size = heap->st_size;
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t *old_entries = heap->strtable16;
duk_uint16_t *new_entries = NULL;
#else
duk_hstring **old_entries = heap->strtable;
duk_hstring **new_entries = NULL;
#endif
duk_uint32_t new_used = 0;
duk_uint32_t i;
#if defined(DUK_USE_DEBUG)
DUK_UNREF(old_used); /* unused with some debug level combinations */
#endif
#ifdef DUK_USE_DDDPRINT
DUK_DDD(DUK_DDDPRINT("attempt to resize stringtable: %ld entries, %ld bytes, %ld used, %ld%% load -> %ld entries, %ld bytes, %ld used, %ld%% load",
(long) old_size, (long) (sizeof(duk_hstring *) * old_size), (long) old_used,
(long) (((double) old_used) / ((double) old_size) * 100.0),
(long) new_size, (long) (sizeof(duk_hstring *) * new_size), (long) duk__count_used_probe(heap),
(long) (((double) duk__count_used_probe(heap)) / ((double) new_size) * 100.0)));
#endif
DUK_ASSERT(new_size > (duk_uint32_t) duk__count_used_probe(heap)); /* required for rehash to succeed, equality not that useful */
DUK_ASSERT(old_entries);
/*
* The attempt to allocate may cause a GC. Such a GC must not attempt to resize
* the stringtable (though it can be swept); finalizer execution and object
* compaction must also be postponed to avoid the pressure to add strings to the
* string table. Call site must prevent these.
*/
#if defined(DUK_USE_MARK_AND_SWEEP)
DUK_ASSERT(heap->mark_and_sweep_base_flags & DUK_MS_FLAG_NO_STRINGTABLE_RESIZE);
DUK_ASSERT(heap->mark_and_sweep_base_flags & DUK_MS_FLAG_NO_FINALIZERS);
DUK_ASSERT(heap->mark_and_sweep_base_flags & DUK_MS_FLAG_NO_OBJECT_COMPACTION);
#endif
#if defined(DUK_USE_HEAPPTR16)
new_entries = (duk_uint16_t *) DUK_ALLOC(heap, sizeof(duk_uint16_t) * new_size);
#else
new_entries = (duk_hstring **) DUK_ALLOC(heap, sizeof(duk_hstring *) * new_size);
#endif
if (!new_entries) {
goto resize_error;
}
#if defined(DUK_USE_EXPLICIT_NULL_INIT)
for (i = 0; i < new_size; i++) {
#if defined(DUK_USE_HEAPPTR16)
new_entries[i] = heap->heapptr_null16;
#else
new_entries[i] = NULL;
#endif
}
#else
#if defined(DUK_USE_HEAPPTR16)
/* Relies on NULL encoding to zero. */
DUK_MEMZERO(new_entries, sizeof(duk_uint16_t) * new_size);
#else
DUK_MEMZERO(new_entries, sizeof(duk_hstring *) * new_size);
#endif
#endif
/* Because new_size > duk__count_used_probe(heap), guaranteed to work */
for (i = 0; i < old_size; i++) {
duk_hstring *e;
#if defined(DUK_USE_HEAPPTR16)
e = (duk_hstring *) DUK_USE_HEAPPTR_DEC16(heap->heap_udata, old_entries[i]);
#else
e = old_entries[i];
#endif
if (e == NULL || e == DUK__DELETED_MARKER(heap)) {
continue;
}
/* checking for DUK__DELETED_MARKER is not necessary here, but helper does it now */
duk__insert_hstring_probe(heap, new_entries, new_size, &new_used, e);
}
#ifdef DUK_USE_DDPRINT
DUK_DD(DUK_DDPRINT("resized stringtable: %ld entries, %ld bytes, %ld used, %ld%% load -> %ld entries, %ld bytes, %ld used, %ld%% load",
(long) old_size, (long) (sizeof(duk_hstring *) * old_size), (long) old_used,
(long) (((double) old_used) / ((double) old_size) * 100.0),
(long) new_size, (long) (sizeof(duk_hstring *) * new_size), (long) new_used,
(long) (((double) new_used) / ((double) new_size) * 100.0)));
#endif
#if defined(DUK_USE_HEAPPTR16)
DUK_FREE(heap, heap->strtable16);
heap->strtable16 = new_entries;
#else
DUK_FREE(heap, heap->strtable);
heap->strtable = new_entries;
#endif
heap->st_size = new_size;
heap->st_used = new_used; /* may be less, since DELETED entries are NULLed by rehash */
return 0; /* OK */
resize_error:
DUK_FREE(heap, new_entries);
return 1; /* FAIL */
}
DUK_LOCAL duk_bool_t duk__resize_strtab_probe(duk_heap *heap) {
duk_uint32_t new_size;
duk_bool_t ret;
new_size = (duk_uint32_t) duk__count_used_probe(heap);
if (new_size >= 0x80000000UL) {
new_size = DUK_STRTAB_HIGHEST_32BIT_PRIME;
} else {
new_size = duk_util_get_hash_prime(DUK_STRTAB_GROW_ST_SIZE(new_size));
new_size = duk_util_get_hash_prime(new_size);
}
DUK_ASSERT(new_size > 0);
/* rehash even if old and new sizes are the same to get rid of
* DELETED entries.
*/
ret = duk__resize_strtab_raw_probe(heap, new_size);
return ret;
}
DUK_LOCAL duk_bool_t duk__recheck_strtab_size_probe(duk_heap *heap, duk_uint32_t new_used) {
duk_uint32_t new_free;
duk_uint32_t tmp1;
duk_uint32_t tmp2;
DUK_ASSERT(new_used <= heap->st_size); /* grow by at most one */
new_free = heap->st_size - new_used; /* unsigned intentionally */
/* new_free / size <= 1 / DIV <=> new_free <= size / DIV */
/* new_used / size <= 1 / DIV <=> new_used <= size / DIV */
tmp1 = heap->st_size / DUK_STRTAB_MIN_FREE_DIVISOR;
tmp2 = heap->st_size / DUK_STRTAB_MIN_USED_DIVISOR;
if (new_free <= tmp1 || new_used <= tmp2) {
/* load factor too low or high, count actually used entries and resize */
return duk__resize_strtab_probe(heap);
} else {
return 0; /* OK */
}
}
#if defined(DUK_USE_DEBUG)
DUK_INTERNAL void duk_heap_dump_strtab(duk_heap *heap) {
duk_uint32_t i;
duk_hstring *h;
DUK_ASSERT(heap != NULL);
#if defined(DUK_USE_HEAPPTR16)
DUK_ASSERT(heap->strtable16 != NULL);
#else
DUK_ASSERT(heap->strtable != NULL);
#endif
DUK_UNREF(h);
for (i = 0; i < heap->st_size; i++) {
#if defined(DUK_USE_HEAPPTR16)
h = (duk_hstring *) DUK_USE_HEAPPTR_DEC16(heap->strtable16[i]);
#else
h = heap->strtable[i];
#endif
DUK_DD(DUK_DDPRINT("[%03d] -> %p", (int) i, (void *) h));
}
}
#endif /* DUK_USE_DEBUG */
#endif /* DUK_USE_STRTAB_PROBE */
/*
* Raw intern and lookup
*/
DUK_LOCAL duk_hstring *duk__do_intern(duk_heap *heap, const duk_uint8_t *str, duk_uint32_t blen, duk_uint32_t strhash) {
duk_hstring *res;
const duk_uint8_t *extdata;
#if defined(DUK_USE_MARK_AND_SWEEP)
duk_small_uint_t prev_mark_and_sweep_base_flags;
#endif
/* Prevent any side effects on the string table and the caller provided
* str/blen arguments while interning is in progress. For example, if
* the caller provided str/blen from a dynamic buffer, a finalizer might
* resize that dynamic buffer, invalidating the call arguments.
*/
#if defined(DUK_USE_MARK_AND_SWEEP)
DUK_ASSERT((heap->mark_and_sweep_base_flags & DUK_MS_FLAG_NO_STRINGTABLE_RESIZE) == 0);
prev_mark_and_sweep_base_flags = heap->mark_and_sweep_base_flags;
DUK__PREVENT_MS_SIDE_EFFECTS(heap);
#endif
#if defined(DUK_USE_STRTAB_PROBE)
if (duk__recheck_strtab_size_probe(heap, heap->st_used + 1)) {
goto failed;
}
#endif
/* For manual testing only. */
#if 0
{
duk_size_t i;
DUK_PRINTF("INTERN: \"");
for (i = 0; i < blen; i++) {
duk_uint8_t x = str[i];
if (x >= 0x20 && x <= 0x7e && x != '"' && x != '\\') {
DUK_PRINTF("%c", (int) x); /* char: use int cast */
} else {
DUK_PRINTF("\\x%02lx", (long) x);
}
}
DUK_PRINTF("\"\n");
}
#endif
#if defined(DUK_USE_HSTRING_EXTDATA) && defined(DUK_USE_EXTSTR_INTERN_CHECK)
extdata = (const duk_uint8_t *) DUK_USE_EXTSTR_INTERN_CHECK(heap->heap_udata, (void *) DUK_LOSE_CONST(str), (duk_size_t) blen);
#else
extdata = (const duk_uint8_t *) NULL;
#endif
res = duk__alloc_init_hstring(heap, str, blen, strhash, extdata);
if (!res) {
goto failed;
}
#if defined(DUK_USE_STRTAB_CHAIN)
if (duk__insert_hstring_chain(heap, res)) {
/* failed */
DUK_FREE(heap, res);
goto failed;
}
#elif defined(DUK_USE_STRTAB_PROBE)
/* guaranteed to succeed */
duk__insert_hstring_probe(heap,
#if defined(DUK_USE_HEAPPTR16)
heap->strtable16,
#else
heap->strtable,
#endif
heap->st_size,
&heap->st_used,
res);
#else
#error internal error, invalid strtab options
#endif
/* Note: hstring is in heap but has refcount zero and is not strongly reachable.
* Caller should increase refcount and make the hstring reachable before any
* operations which require allocation (and possible gc).
*/
done:
#if defined(DUK_USE_MARK_AND_SWEEP)
heap->mark_and_sweep_base_flags = prev_mark_and_sweep_base_flags;
#endif
return res;
failed:
res = NULL;
goto done;
}
DUK_LOCAL duk_hstring *duk__do_lookup(duk_heap *heap, const duk_uint8_t *str, duk_uint32_t blen, duk_uint32_t *out_strhash) {
duk_hstring *res;
DUK_ASSERT(out_strhash);
*out_strhash = duk_heap_hashstring(heap, str, (duk_size_t) blen);
#if defined(DUK_USE_ROM_STRINGS)
{
duk_small_uint_t i;
/* XXX: This is VERY inefficient now, and should be e.g. a
* binary search or perfect hash, to be fixed.
*/
for (i = 0; i < (duk_small_uint_t) (sizeof(duk_rom_strings) / sizeof(duk_hstring *)); i++) {
duk_hstring *romstr;
romstr = (duk_hstring *) DUK_LOSE_CONST(duk_rom_strings[i]);
if (blen == DUK_HSTRING_GET_BYTELEN(romstr) &&
DUK_MEMCMP((const void *) str, (const void *) DUK_HSTRING_GET_DATA(romstr), blen) == 0) {
DUK_DD(DUK_DDPRINT("intern check: rom string: %!O, computed hash 0x%08lx, rom hash 0x%08lx",
romstr, (unsigned long) *out_strhash, (unsigned long) DUK_HSTRING_GET_HASH(romstr)));
DUK_ASSERT(*out_strhash == DUK_HSTRING_GET_HASH(romstr));
*out_strhash = DUK_HSTRING_GET_HASH(romstr);
return romstr;
}
}
}
#endif /* DUK_USE_ROM_STRINGS */
#if defined(DUK_USE_STRTAB_CHAIN)
res = duk__find_matching_string_chain(heap, str, blen, *out_strhash);
#elif defined(DUK_USE_STRTAB_PROBE)
res = duk__find_matching_string_probe(heap,
#if defined(DUK_USE_HEAPPTR16)
heap->strtable16,
#else
heap->strtable,
#endif
heap->st_size,
str,
blen,
*out_strhash);
#else
#error internal error, invalid strtab options
#endif
return res;
}
/*
* Exposed calls
*/
#if 0 /*unused*/
DUK_INTERNAL duk_hstring *duk_heap_string_lookup(duk_heap *heap, const duk_uint8_t *str, duk_uint32_t blen) {
duk_uint32_t strhash; /* dummy */
return duk__do_lookup(heap, str, blen, &strhash);
}
#endif
DUK_INTERNAL duk_hstring *duk_heap_string_intern(duk_heap *heap, const duk_uint8_t *str, duk_uint32_t blen) {
duk_hstring *res;
duk_uint32_t strhash;
/* caller is responsible for ensuring this */
DUK_ASSERT(blen <= DUK_HSTRING_MAX_BYTELEN);
res = duk__do_lookup(heap, str, blen, &strhash);
if (res) {
return res;
}
res = duk__do_intern(heap, str, blen, strhash);
return res; /* may be NULL */
}
DUK_INTERNAL duk_hstring *duk_heap_string_intern_checked(duk_hthread *thr, const duk_uint8_t *str, duk_uint32_t blen) {
duk_hstring *res = duk_heap_string_intern(thr->heap, str, blen);
if (!res) {
DUK_ERROR_ALLOC_DEFMSG(thr);
}
return res;
}
#if 0 /*unused*/
DUK_INTERNAL duk_hstring *duk_heap_string_lookup_u32(duk_heap *heap, duk_uint32_t val) {
char buf[DUK_STRTAB_U32_MAX_STRLEN+1];
DUK_SNPRINTF(buf, sizeof(buf), "%lu", (unsigned long) val);
buf[sizeof(buf) - 1] = (char) 0;
DUK_ASSERT(DUK_STRLEN(buf) <= DUK_UINT32_MAX); /* formatted result limited */
return duk_heap_string_lookup(heap, (const duk_uint8_t *) buf, (duk_uint32_t) DUK_STRLEN(buf));
}
#endif
DUK_INTERNAL duk_hstring *duk_heap_string_intern_u32(duk_heap *heap, duk_uint32_t val) {
char buf[DUK_STRTAB_U32_MAX_STRLEN+1];
DUK_SNPRINTF(buf, sizeof(buf), "%lu", (unsigned long) val);
buf[sizeof(buf) - 1] = (char) 0;
DUK_ASSERT(DUK_STRLEN(buf) <= DUK_UINT32_MAX); /* formatted result limited */
return duk_heap_string_intern(heap, (const duk_uint8_t *) buf, (duk_uint32_t) DUK_STRLEN(buf));
}
DUK_INTERNAL duk_hstring *duk_heap_string_intern_u32_checked(duk_hthread *thr, duk_uint32_t val) {
duk_hstring *res = duk_heap_string_intern_u32(thr->heap, val);
if (!res) {
DUK_ERROR_ALLOC_DEFMSG(thr);
}
return res;
}
/* find and remove string from stringtable; caller must free the string itself */
#if defined(DUK_USE_REFERENCE_COUNTING)
DUK_INTERNAL void duk_heap_string_remove(duk_heap *heap, duk_hstring *h) {
DUK_DDD(DUK_DDDPRINT("remove string from stringtable: %!O", (duk_heaphdr *) h));
#if defined(DUK_USE_STRTAB_CHAIN)
duk__remove_matching_hstring_chain(heap, h);
#elif defined(DUK_USE_STRTAB_PROBE)
duk__remove_matching_hstring_probe(heap,
#if defined(DUK_USE_HEAPPTR16)
heap->strtable16,
#else
heap->strtable,
#endif
heap->st_size,
h);
#else
#error internal error, invalid strtab options
#endif
}
#endif
#if defined(DUK_USE_MARK_AND_SWEEP) && defined(DUK_USE_MS_STRINGTABLE_RESIZE)
DUK_INTERNAL void duk_heap_force_strtab_resize(duk_heap *heap) {
duk_small_uint_t prev_mark_and_sweep_base_flags;
/* Force a resize so that DELETED entries are eliminated.
* Another option would be duk__recheck_strtab_size_probe();
* but since that happens on every intern anyway, this whole
* check can now be disabled.
*/
DUK_ASSERT((heap->mark_and_sweep_base_flags & DUK_MS_FLAG_NO_STRINGTABLE_RESIZE) == 0);
prev_mark_and_sweep_base_flags = heap->mark_and_sweep_base_flags;
DUK__PREVENT_MS_SIDE_EFFECTS(heap);
#if defined(DUK_USE_STRTAB_CHAIN)
DUK_UNREF(heap);
#elif defined(DUK_USE_STRTAB_PROBE)
(void) duk__resize_strtab_probe(heap);
#endif
heap->mark_and_sweep_base_flags = prev_mark_and_sweep_base_flags;
}
#endif
#if defined(DUK_USE_STRTAB_CHAIN)
DUK_INTERNAL void duk_heap_free_strtab(duk_heap *heap) {
/* Free strings in the stringtable and any allocations needed
* by the stringtable itself.
*/
duk_uint_fast32_t i, j;
duk_strtab_entry *e;
#if defined(DUK_USE_HEAPPTR16)
duk_uint16_t *lst;
duk_uint16_t null16 = heap->heapptr_null16;
#else
duk_hstring **lst;
#endif
duk_hstring *h;
for (i = 0; i < DUK_STRTAB_CHAIN_SIZE; i++) {
e = heap->strtable + i;
if (e->listlen > 0) {
#if defined(DUK_USE_HEAPPTR16)
lst = (duk_uint16_t *) DUK_USE_HEAPPTR_DEC16(heap->heap_udata, e->u.strlist16);
#else
lst = e->u.strlist;
#endif
DUK_ASSERT(lst != NULL);
for (j = 0; j < e->listlen; j++) {
#if defined(DUK_USE_HEAPPTR16)
h = DUK_USE_HEAPPTR_DEC16(heap->heap_udata, lst[j]);
lst[j] = null16;
#else
h = lst[j];
lst[j] = NULL;
#endif
/* strings may have inner refs (extdata) in some cases */
if (h != NULL) {
duk_free_hstring_inner(heap, h);
DUK_FREE(heap, h);
}
}
#if defined(DUK_USE_HEAPPTR16)
e->u.strlist16 = null16;
#else
e->u.strlist = NULL;
#endif
DUK_FREE(heap, lst);
} else {
#if defined(DUK_USE_HEAPPTR16)
h = DUK_USE_HEAPPTR_DEC16(heap->heap_udata, e->u.str16);
e->u.str16 = null16;
#else
h = e->u.str;
e->u.str = NULL;
#endif
if (h != NULL) {
duk_free_hstring_inner(heap, h);
DUK_FREE(heap, h);
}
}
e->listlen = 0;
}
}
#endif /* DUK_USE_STRTAB_CHAIN */
#if defined(DUK_USE_STRTAB_PROBE)
DUK_INTERNAL void duk_heap_free_strtab(duk_heap *heap) {
duk_uint_fast32_t i;
duk_hstring *h;
#if defined(DUK_USE_HEAPPTR16)
if (heap->strtable16) {
#else
if (heap->strtable) {
#endif
for (i = 0; i < (duk_uint_fast32_t) heap->st_size; i++) {
#if defined(DUK_USE_HEAPPTR16)
h = (duk_hstring *) DUK_USE_HEAPPTR_DEC16(heap->heap_udata, heap->strtable16[i]);
#else
h = heap->strtable[i];
#endif
if (h == NULL || h == DUK_STRTAB_DELETED_MARKER(heap)) {
continue;
}
DUK_ASSERT(h != NULL);
/* strings may have inner refs (extdata) in some cases */
duk_free_hstring_inner(heap, h);
DUK_FREE(heap, h);
#if 0 /* not strictly necessary */
heap->strtable[i] = NULL;
#endif
}
#if defined(DUK_USE_HEAPPTR16)
DUK_FREE(heap, heap->strtable16);
#else
DUK_FREE(heap, heap->strtable);
#endif
#if 0 /* not strictly necessary */
heap->strtable = NULL;
#endif
}
}
#endif /* DUK_USE_STRTAB_PROBE */
/* Undefine local defines */
#undef DUK__HASH_INITIAL
#undef DUK__HASH_PROBE_STEP
#undef DUK__DELETED_MARKER
#line 1 "duk_hobject_alloc.c"
/*
* Hobject allocation.
*
* Provides primitive allocation functions for all object types (plain object,
* compiled function, native function, thread). The object return is not yet
* in "heap allocated" list and has a refcount of zero, so caller must careful.
*/
/* include removed: duk_internal.h */
DUK_LOCAL void duk__init_object_parts(duk_heap *heap, duk_hobject *obj, duk_uint_t hobject_flags) {
#ifdef DUK_USE_EXPLICIT_NULL_INIT
DUK_HOBJECT_SET_PROPS(heap, obj, NULL);
#endif
/* XXX: macro? sets both heaphdr and object flags */
obj->hdr.h_flags = hobject_flags;
DUK_HEAPHDR_SET_TYPE(&obj->hdr, DUK_HTYPE_OBJECT); /* also goes into flags */
#if defined(DUK_USE_HEAPPTR16)
/* Zero encoded pointer is required to match NULL */
DUK_HEAPHDR_SET_NEXT(heap, &obj->hdr, NULL);
#if defined(DUK_USE_DOUBLE_LINKED_HEAP)
DUK_HEAPHDR_SET_PREV(heap, &obj->hdr, NULL);
#endif
#endif
DUK_ASSERT_HEAPHDR_LINKS(heap, &obj->hdr);
DUK_HEAP_INSERT_INTO_HEAP_ALLOCATED(heap, &obj->hdr);
/*
* obj->props is intentionally left as NULL, and duk_hobject_props.c must deal
* with this properly. This is intentional: empty objects consume a minimum
* amount of memory. Further, an initial allocation might fail and cause
* 'obj' to "leak" (require a mark-and-sweep) since it is not reachable yet.
*/
}
/*
* Allocate an duk_hobject.
*
* The allocated object has no allocation for properties; the caller may
* want to force a resize if a desired size is known.
*
* The allocated object has zero reference count and is not reachable.
* The caller MUST make the object reachable and increase its reference
* count before invoking any operation that might require memory allocation.
*/
DUK_INTERNAL duk_hobject *duk_hobject_alloc(duk_heap *heap, duk_uint_t hobject_flags) {
duk_hobject *res;
DUK_ASSERT(heap != NULL);
/* different memory layout, alloc size, and init */
DUK_ASSERT((hobject_flags & DUK_HOBJECT_FLAG_COMPILEDFUNCTION) == 0);
DUK_ASSERT((hobject_flags & DUK_HOBJECT_FLAG_NATIVEFUNCTION) == 0);
DUK_ASSERT((hobject_flags & DUK_HOBJECT_FLAG_THREAD) == 0);
res = (duk_hobject *) DUK_ALLOC(heap, sizeof(duk_hobject));
if (!res) {
return NULL;
}
DUK_MEMZERO(res, sizeof(duk_hobject));
duk__init_object_parts(heap, res, hobject_flags);
return res;
}
DUK_INTERNAL duk_hcompiledfunction *duk_hcompiledfunction_alloc(duk_heap *heap, duk_uint_t hobject_flags) {
duk_hcompiledfunction *res;
res = (duk_hcompiledfunction *) DUK_ALLOC(heap, sizeof(duk_hcompiledfunction));
if (!res) {
return NULL;
}
DUK_MEMZERO(res, sizeof(duk_hcompiledfunction));
duk__init_object_parts(heap, &res->obj, hobject_flags);
#ifdef DUK_USE_EXPLICIT_NULL_INIT
#ifdef DUK_USE_HEAPPTR16
/* NULL pointer is required to encode to zero, so memset is enough. */
#else
res->data = NULL;
res->funcs = NULL;
res->bytecode = NULL;
#endif
#endif
return res;
}
DUK_INTERNAL duk_hnativefunction *duk_hnativefunction_alloc(duk_heap *heap, duk_uint_t hobject_flags) {
duk_hnativefunction *res;
res = (duk_hnativefunction *) DUK_ALLOC(heap, sizeof(duk_hnativefunction));
if (!res) {
return NULL;
}
DUK_MEMZERO(res, sizeof(duk_hnativefunction));
duk__init_object_parts(heap, &res->obj, hobject_flags);
#ifdef DUK_USE_EXPLICIT_NULL_INIT
res->func = NULL;
#endif
return res;
}
DUK_INTERNAL duk_hbufferobject *duk_hbufferobject_alloc(duk_heap *heap, duk_uint_t hobject_flags) {
duk_hbufferobject *res;
res = (duk_hbufferobject *) DUK_ALLOC(heap, sizeof(duk_hbufferobject));
if (!res) {
return NULL;
}
DUK_MEMZERO(res, sizeof(duk_hbufferobject));
duk__init_object_parts(heap, &res->obj, hobject_flags);
#ifdef DUK_USE_EXPLICIT_NULL_INIT
res->buf = NULL;
#endif
DUK_ASSERT_HBUFFEROBJECT_VALID(res);
return res;
}
/*
* Allocate a new thread.
*
* Leaves the built-ins array uninitialized. The caller must either
* initialize a new global context or share existing built-ins from
* another thread.
*/
DUK_INTERNAL duk_hthread *duk_hthread_alloc(duk_heap *heap, duk_uint_t hobject_flags) {
duk_hthread *res;
res = (duk_hthread *) DUK_ALLOC(heap, sizeof(duk_hthread));
if (!res) {
return NULL;
}
DUK_MEMZERO(res, sizeof(duk_hthread));
duk__init_object_parts(heap, &res->obj, hobject_flags);
#ifdef DUK_USE_EXPLICIT_NULL_INIT
res->ptr_curr_pc = NULL;
res->heap = NULL;
res->valstack = NULL;
res->valstack_end = NULL;
res->valstack_bottom = NULL;
res->valstack_top = NULL;
res->callstack = NULL;
res->catchstack = NULL;
res->resumer = NULL;
res->compile_ctx = NULL,
#ifdef DUK_USE_HEAPPTR16
res->strs16 = NULL;
#else
res->strs = NULL;
#endif
{
int i;
for (i = 0; i < DUK_NUM_BUILTINS; i++) {
res->builtins[i] = NULL;
}
}
#endif
/* when nothing is running, API calls are in non-strict mode */
DUK_ASSERT(res->strict == 0);
res->heap = heap;
res->valstack_max = DUK_VALSTACK_DEFAULT_MAX;
res->callstack_max = DUK_CALLSTACK_DEFAULT_MAX;
res->catchstack_max = DUK_CATCHSTACK_DEFAULT_MAX;
return res;
}
#if 0 /* unused now */
DUK_INTERNAL duk_hobject *duk_hobject_alloc_checked(duk_hthread *thr, duk_uint_t hobject_flags) {
duk_hobject *res = duk_hobject_alloc(thr->heap, hobject_flags);
if (!res) {
DUK_ERROR_ALLOC_DEFMSG(thr);
}
return res;
}
#endif
#line 1 "duk_hobject_enum.c"
/*
* Hobject enumeration support.
*
* Creates an internal enumeration state object to be used e.g. with for-in
* enumeration. The state object contains a snapshot of target object keys
* and internal control state for enumeration. Enumerator flags allow caller
* to e.g. request internal/non-enumerable properties, and to enumerate only
* "own" properties.
*
* Also creates the result value for e.g. Object.keys() based on the same
* internal structure.
*
* This snapshot-based enumeration approach is used to simplify enumeration:
* non-snapshot-based approaches are difficult to reconcile with mutating
* the enumeration target, running multiple long-lived enumerators at the
* same time, garbage collection details, etc. The downside is that the
* enumerator object is memory inefficient especially for iterating arrays.
*/
/* include removed: duk_internal.h */
/* XXX: identify enumeration target with an object index (not top of stack) */
/* must match exactly the number of internal properties inserted to enumerator */
#define DUK__ENUM_START_INDEX 2
DUK_LOCAL const duk_uint16_t duk__bufferobject_virtual_props[] = {
DUK_STRIDX_LENGTH,
DUK_STRIDX_BYTE_LENGTH,
DUK_STRIDX_BYTE_OFFSET,
DUK_STRIDX_BYTES_PER_ELEMENT
};
/*
* Helper to sort array index keys. The keys are in the enumeration object
* entry part, starting from DUK__ENUM_START_INDEX, and the entry part is dense.
*
* We use insertion sort because it is simple (leading to compact code,)
* works nicely in-place, and minimizes operations if data is already sorted
* or nearly sorted (which is a very common case here). It also minimizes
* the use of element comparisons in general. This is nice because element
* comparisons here involve re-parsing the string keys into numbers each
* time, which is naturally very expensive.
*
* Note that the entry part values are all "true", e.g.
*
* "1" -> true, "3" -> true, "2" -> true
*
* so it suffices to only work in the key part without exchanging any keys,
* simplifying the sort.
*
* http://en.wikipedia.org/wiki/Insertion_sort
*
* (Compiles to about 160 bytes now as a stand-alone function.)
*/
DUK_LOCAL void duk__sort_array_indices(duk_hthread *thr, duk_hobject *h_obj) {
duk_hstring **keys;
duk_hstring **p_curr, **p_insert, **p_end;
duk_hstring *h_curr;
duk_uarridx_t val_highest, val_curr, val_insert;
DUK_ASSERT(h_obj != NULL);
DUK_ASSERT(DUK_HOBJECT_GET_ENEXT(h_obj) >= 2); /* control props */
DUK_UNREF(thr);
if (DUK_HOBJECT_GET_ENEXT(h_obj) <= 1 + DUK__ENUM_START_INDEX) {
return;
}
keys = DUK_HOBJECT_E_GET_KEY_BASE(thr->heap, h_obj);
p_end = keys + DUK_HOBJECT_GET_ENEXT(h_obj);
keys += DUK__ENUM_START_INDEX;
DUK_DDD(DUK_DDDPRINT("keys=%p, p_end=%p (after skipping enum props)",
(void *) keys, (void *) p_end));
#ifdef DUK_USE_DDDPRINT
{
duk_uint_fast32_t i;
for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(h_obj); i++) {
DUK_DDD(DUK_DDDPRINT("initial: %ld %p -> %!O",
(long) i,
(void *) DUK_HOBJECT_E_GET_KEY_PTR(thr->heap, h_obj, i),
(duk_heaphdr *) DUK_HOBJECT_E_GET_KEY(thr->heap, h_obj, i)));
}
}
#endif
val_highest = DUK_HSTRING_GET_ARRIDX_SLOW(keys[0]);
for (p_curr = keys + 1; p_curr < p_end; p_curr++) {
DUK_ASSERT(*p_curr != NULL);
val_curr = DUK_HSTRING_GET_ARRIDX_SLOW(*p_curr);
if (val_curr >= val_highest) {
DUK_DDD(DUK_DDDPRINT("p_curr=%p, p_end=%p, val_highest=%ld, val_curr=%ld -> "
"already in correct order, next",
(void *) p_curr, (void *) p_end, (long) val_highest, (long) val_curr));
val_highest = val_curr;
continue;
}
DUK_DDD(DUK_DDDPRINT("p_curr=%p, p_end=%p, val_highest=%ld, val_curr=%ld -> "
"needs to be inserted",
(void *) p_curr, (void *) p_end, (long) val_highest, (long) val_curr));
/* Needs to be inserted; scan backwards, since we optimize
* for the case where elements are nearly in order.
*/
p_insert = p_curr - 1;
for (;;) {
val_insert = DUK_HSTRING_GET_ARRIDX_SLOW(*p_insert);
if (val_insert < val_curr) {
DUK_DDD(DUK_DDDPRINT("p_insert=%p, val_insert=%ld, val_curr=%ld -> insert after this",
(void *) p_insert, (long) val_insert, (long) val_curr));
p_insert++;
break;
}
if (p_insert == keys) {
DUK_DDD(DUK_DDDPRINT("p_insert=%p -> out of keys, insert to beginning", (void *) p_insert));
break;
}
DUK_DDD(DUK_DDDPRINT("p_insert=%p, val_insert=%ld, val_curr=%ld -> search backwards",
(void *) p_insert, (long) val_insert, (long) val_curr));
p_insert--;
}
DUK_DDD(DUK_DDDPRINT("final p_insert=%p", (void *) p_insert));
/* .-- p_insert .-- p_curr
* v v
* | ... | insert | ... | curr
*/
h_curr = *p_curr;
DUK_DDD(DUK_DDDPRINT("memmove: dest=%p, src=%p, size=%ld, h_curr=%p",
(void *) (p_insert + 1), (void *) p_insert,
(long) (p_curr - p_insert), (void *) h_curr));
DUK_MEMMOVE((void *) (p_insert + 1),
(const void *) p_insert,
(size_t) ((p_curr - p_insert) * sizeof(duk_hstring *)));
*p_insert = h_curr;
/* keep val_highest */
}
#ifdef DUK_USE_DDDPRINT
{
duk_uint_fast32_t i;
for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(h_obj); i++) {
DUK_DDD(DUK_DDDPRINT("final: %ld %p -> %!O",
(long) i,
(void *) DUK_HOBJECT_E_GET_KEY_PTR(thr->heap, h_obj, i),
(duk_heaphdr *) DUK_HOBJECT_E_GET_KEY(thr->heap, h_obj, i)));
}
}
#endif
}
/*
* Create an internal enumerator object E, which has its keys ordered
* to match desired enumeration ordering. Also initialize internal control
* properties for enumeration.
*
* Note: if an array was used to hold enumeration keys instead, an array
* scan would be needed to eliminate duplicates found in the prototype chain.
*/
DUK_INTERNAL void duk_hobject_enumerator_create(duk_context *ctx, duk_small_uint_t enum_flags) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *enum_target;
duk_hobject *curr;
duk_hobject *res;
#if defined(DUK_USE_ES6_PROXY)
duk_hobject *h_proxy_target;
duk_hobject *h_proxy_handler;
duk_hobject *h_trap_result;
#endif
duk_uint_fast32_t i, len; /* used for array, stack, and entry indices */
DUK_ASSERT(ctx != NULL);
DUK_DDD(DUK_DDDPRINT("create enumerator, stack top: %ld", (long) duk_get_top(ctx)));
enum_target = duk_require_hobject(ctx, -1);
DUK_ASSERT(enum_target != NULL);
duk_push_object_internal(ctx);
res = duk_require_hobject(ctx, -1);
DUK_DDD(DUK_DDDPRINT("created internal object"));
/* [enum_target res] */
/* Target must be stored so that we can recheck whether or not
* keys still exist when we enumerate. This is not done if the
* enumeration result comes from a proxy trap as there is no
* real object to check against.
*/
duk_push_hobject(ctx, enum_target);
duk_put_prop_stridx(ctx, -2, DUK_STRIDX_INT_TARGET);
/* Initialize index so that we skip internal control keys. */
duk_push_int(ctx, DUK__ENUM_START_INDEX);
duk_put_prop_stridx(ctx, -2, DUK_STRIDX_INT_NEXT);
/*
* Proxy object handling
*/
#if defined(DUK_USE_ES6_PROXY)
if (DUK_LIKELY((enum_flags & DUK_ENUM_NO_PROXY_BEHAVIOR) != 0)) {
goto skip_proxy;
}
if (DUK_LIKELY(!duk_hobject_proxy_check(thr,
enum_target,
&h_proxy_target,
&h_proxy_handler))) {
goto skip_proxy;
}
DUK_DDD(DUK_DDDPRINT("proxy enumeration"));
duk_push_hobject(ctx, h_proxy_handler);
if (!duk_get_prop_stridx(ctx, -1, DUK_STRIDX_ENUMERATE)) {
/* No need to replace the 'enum_target' value in stack, only the
* enum_target reference. This also ensures that the original
* enum target is reachable, which keeps the proxy and the proxy
* target reachable. We do need to replace the internal _Target.
*/
DUK_DDD(DUK_DDDPRINT("no enumerate trap, enumerate proxy target instead"));
DUK_DDD(DUK_DDDPRINT("h_proxy_target=%!O", (duk_heaphdr *) h_proxy_target));
enum_target = h_proxy_target;
duk_push_hobject(ctx, enum_target); /* -> [ ... enum_target res handler undefined target ] */
duk_put_prop_stridx(ctx, -4, DUK_STRIDX_INT_TARGET);
duk_pop_2(ctx); /* -> [ ... enum_target res ] */
goto skip_proxy;
}
/* [ ... enum_target res handler trap ] */
duk_insert(ctx, -2);
duk_push_hobject(ctx, h_proxy_target); /* -> [ ... enum_target res trap handler target ] */
duk_call_method(ctx, 1 /*nargs*/); /* -> [ ... enum_target res trap_result ] */
h_trap_result = duk_require_hobject(ctx, -1);
DUK_UNREF(h_trap_result);
/* Copy trap result keys into the enumerator object. */
len = (duk_uint_fast32_t) duk_get_length(ctx, -1);
for (i = 0; i < len; i++) {
/* XXX: not sure what the correct semantic details are here,
* e.g. handling of missing values (gaps), handling of non-array
* trap results, etc.
*
* For keys, we simply skip non-string keys which seems to be
* consistent with how e.g. Object.keys() will process proxy trap
* results (ES6, Section 19.1.2.14).
*/
if (duk_get_prop_index(ctx, -1, i) && duk_is_string(ctx, -1)) {
/* [ ... enum_target res trap_result val ] */
duk_push_true(ctx);
/* [ ... enum_target res trap_result val true ] */
duk_put_prop(ctx, -4);
} else {
duk_pop(ctx);
}
}
/* [ ... enum_target res trap_result ] */
duk_pop(ctx);
duk_remove(ctx, -2);
/* [ ... res ] */
/* The internal _Target property is kept pointing to the original
* enumeration target (the proxy object), so that the enumerator
* 'next' operation can read property values if so requested. The
* fact that the _Target is a proxy disables key existence check
* during enumeration.
*/
DUK_DDD(DUK_DDDPRINT("proxy enumeration, final res: %!O", (duk_heaphdr *) res));
goto compact_and_return;
skip_proxy:
#endif /* DUK_USE_ES6_PROXY */
curr = enum_target;
while (curr) {
/*
* Virtual properties.
*
* String and buffer indices are virtual and always enumerable,
* 'length' is virtual and non-enumerable. Array and arguments
* object props have special behavior but are concrete.
*/
if (DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(curr) ||
DUK_HOBJECT_IS_BUFFEROBJECT(curr)) {
/* String and buffer enumeration behavior is identical now,
* so use shared handler.
*/
if (DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(curr)) {
duk_hstring *h_val;
h_val = duk_hobject_get_internal_value_string(thr->heap, curr);
DUK_ASSERT(h_val != NULL); /* string objects must not created without internal value */
len = (duk_uint_fast32_t) DUK_HSTRING_GET_CHARLEN(h_val);
} else {
duk_hbufferobject *h_bufobj;
DUK_ASSERT(DUK_HOBJECT_IS_BUFFEROBJECT(curr));
h_bufobj = (duk_hbufferobject *) curr;
if (h_bufobj == NULL) {
/* Neutered buffer, zero length seems
* like good behavior here.
*/
len = 0;
} else {
/* There's intentionally no check for
* current underlying buffer length.
*/
len = (duk_uint_fast32_t) (h_bufobj->length >> h_bufobj->shift);
}
}
for (i = 0; i < len; i++) {
duk_hstring *k;
k = duk_heap_string_intern_u32_checked(thr, i);
DUK_ASSERT(k);
duk_push_hstring(ctx, k);
duk_push_true(ctx);
/* [enum_target res key true] */
duk_put_prop(ctx, -3);
/* [enum_target res] */
}
/* 'length' and other virtual properties are not
* enumerable, but are included if non-enumerable
* properties are requested.
*/
if (enum_flags & DUK_ENUM_INCLUDE_NONENUMERABLE) {
duk_uint_fast32_t n;
if (DUK_HOBJECT_IS_BUFFEROBJECT(curr)) {
n = sizeof(duk__bufferobject_virtual_props) / sizeof(duk_uint16_t);
} else {
DUK_ASSERT(DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(curr));
DUK_ASSERT(duk__bufferobject_virtual_props[0] == DUK_STRIDX_LENGTH);
n = 1; /* only 'length' */
}
for (i = 0; i < n; i++) {
duk_push_hstring_stridx(ctx, duk__bufferobject_virtual_props[i]);
duk_push_true(ctx);
duk_put_prop(ctx, -3);
}
}
} else if (DUK_HOBJECT_HAS_EXOTIC_DUKFUNC(curr)) {
if (enum_flags & DUK_ENUM_INCLUDE_NONENUMERABLE) {
duk_push_hstring_stridx(ctx, DUK_STRIDX_LENGTH);
duk_push_true(ctx);
duk_put_prop(ctx, -3);
}
}
/*
* Array part
*
* Note: ordering between array and entry part must match 'abandon array'
* behavior in duk_hobject_props.c: key order after an array is abandoned
* must be the same.
*/
for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ASIZE(curr); i++) {
duk_hstring *k;
duk_tval *tv;
tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, curr, i);
if (DUK_TVAL_IS_UNUSED(tv)) {
continue;
}
k = duk_heap_string_intern_u32_checked(thr, i);
DUK_ASSERT(k);
duk_push_hstring(ctx, k);
duk_push_true(ctx);
/* [enum_target res key true] */
duk_put_prop(ctx, -3);
/* [enum_target res] */
}
/*
* Entries part
*/
for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(curr); i++) {
duk_hstring *k;
k = DUK_HOBJECT_E_GET_KEY(thr->heap, curr, i);
if (!k) {
continue;
}
if (!DUK_HOBJECT_E_SLOT_IS_ENUMERABLE(thr->heap, curr, i) &&
!(enum_flags & DUK_ENUM_INCLUDE_NONENUMERABLE)) {
continue;
}
if (DUK_HSTRING_HAS_INTERNAL(k) &&
!(enum_flags & DUK_ENUM_INCLUDE_INTERNAL)) {
continue;
}
if ((enum_flags & DUK_ENUM_ARRAY_INDICES_ONLY) &&
(DUK_HSTRING_GET_ARRIDX_SLOW(k) == DUK_HSTRING_NO_ARRAY_INDEX)) {
continue;
}
DUK_ASSERT(DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, curr, i) ||
!DUK_TVAL_IS_UNUSED(&DUK_HOBJECT_E_GET_VALUE_PTR(thr->heap, curr, i)->v));
duk_push_hstring(ctx, k);
duk_push_true(ctx);
/* [enum_target res key true] */
duk_put_prop(ctx, -3);
/* [enum_target res] */
}
if (enum_flags & DUK_ENUM_OWN_PROPERTIES_ONLY) {
break;
}
curr = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, curr);
}
/* [enum_target res] */
duk_remove(ctx, -2);
/* [res] */
if ((enum_flags & (DUK_ENUM_ARRAY_INDICES_ONLY | DUK_ENUM_SORT_ARRAY_INDICES)) ==
(DUK_ENUM_ARRAY_INDICES_ONLY | DUK_ENUM_SORT_ARRAY_INDICES)) {
/*
* Some E5/E5.1 algorithms require that array indices are iterated
* in a strictly ascending order. This is the case for e.g.
* Array.prototype.forEach() and JSON.stringify() PropertyList
* handling.
*
* To ensure this property for arrays with an array part (and
* arbitrary objects too, since e.g. forEach() can be applied
* to an array), the caller can request that we sort the keys
* here.
*/
/* XXX: avoid this at least when enum_target is an Array, it has an
* array part, and no ancestor properties were included? Not worth
* it for JSON, but maybe worth it for forEach().
*/
/* XXX: may need a 'length' filter for forEach()
*/
DUK_DDD(DUK_DDDPRINT("sort array indices by caller request"));
duk__sort_array_indices(thr, res);
}
#if defined(DUK_USE_ES6_PROXY)
compact_and_return:
#endif
/* compact; no need to seal because object is internal */
duk_hobject_compact_props(thr, res);
DUK_DDD(DUK_DDDPRINT("created enumerator object: %!iT", (duk_tval *) duk_get_tval(ctx, -1)));
}
/*
* Returns non-zero if a key and/or value was enumerated, and:
*
* [enum] -> [key] (get_value == 0)
* [enum] -> [key value] (get_value == 1)
*
* Returns zero without pushing anything on the stack otherwise.
*/
DUK_INTERNAL duk_bool_t duk_hobject_enumerator_next(duk_context *ctx, duk_bool_t get_value) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *e;
duk_hobject *enum_target;
duk_hstring *res = NULL;
duk_uint_fast32_t idx;
duk_bool_t check_existence;
DUK_ASSERT(ctx != NULL);
/* [... enum] */
e = duk_require_hobject(ctx, -1);
/* XXX use get tval ptr, more efficient */
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_NEXT);
idx = (duk_uint_fast32_t) duk_require_uint(ctx, -1);
duk_pop(ctx);
DUK_DDD(DUK_DDDPRINT("enumeration: index is: %ld", (long) idx));
/* Enumeration keys are checked against the enumeration target (to see
* that they still exist). In the proxy enumeration case _Target will
* be the proxy, and checking key existence against the proxy is not
* required (or sensible, as the keys may be fully virtual).
*/
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_TARGET);
enum_target = duk_require_hobject(ctx, -1);
DUK_ASSERT(enum_target != NULL);
#if defined(DUK_USE_ES6_PROXY)
check_existence = (!DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(enum_target));
#else
check_existence = 1;
#endif
duk_pop(ctx); /* still reachable */
DUK_DDD(DUK_DDDPRINT("getting next enum value, enum_target=%!iO, enumerator=%!iT",
(duk_heaphdr *) enum_target, (duk_tval *) duk_get_tval(ctx, -1)));
/* no array part */
for (;;) {
duk_hstring *k;
if (idx >= DUK_HOBJECT_GET_ENEXT(e)) {
DUK_DDD(DUK_DDDPRINT("enumeration: ran out of elements"));
break;
}
/* we know these because enum objects are internally created */
k = DUK_HOBJECT_E_GET_KEY(thr->heap, e, idx);
DUK_ASSERT(k != NULL);
DUK_ASSERT(!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, e, idx));
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(&DUK_HOBJECT_E_GET_VALUE(thr->heap, e, idx).v));
idx++;
/* recheck that the property still exists */
if (check_existence && !duk_hobject_hasprop_raw(thr, enum_target, k)) {
DUK_DDD(DUK_DDDPRINT("property deleted during enumeration, skip"));
continue;
}
DUK_DDD(DUK_DDDPRINT("enumeration: found element, key: %!O", (duk_heaphdr *) k));
res = k;
break;
}
DUK_DDD(DUK_DDDPRINT("enumeration: updating next index to %ld", (long) idx));
duk_push_u32(ctx, (duk_uint32_t) idx);
duk_put_prop_stridx(ctx, -2, DUK_STRIDX_INT_NEXT);
/* [... enum] */
if (res) {
duk_push_hstring(ctx, res);
if (get_value) {
duk_push_hobject(ctx, enum_target);
duk_dup(ctx, -2); /* -> [... enum key enum_target key] */
duk_get_prop(ctx, -2); /* -> [... enum key enum_target val] */
duk_remove(ctx, -2); /* -> [... enum key val] */
duk_remove(ctx, -3); /* -> [... key val] */
} else {
duk_remove(ctx, -2); /* -> [... key] */
}
return 1;
} else {
duk_pop(ctx); /* -> [...] */
return 0;
}
}
/*
* Get enumerated keys in an Ecmascript array. Matches Object.keys() behavior
* described in E5 Section 15.2.3.14.
*/
DUK_INTERNAL duk_ret_t duk_hobject_get_enumerated_keys(duk_context *ctx, duk_small_uint_t enum_flags) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *e;
duk_uint_fast32_t i;
duk_uint_fast32_t idx;
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(duk_get_hobject(ctx, -1) != NULL);
DUK_UNREF(thr);
/* Create a temporary enumerator to get the (non-duplicated) key list;
* the enumerator state is initialized without being needed, but that
* has little impact.
*/
duk_hobject_enumerator_create(ctx, enum_flags);
duk_push_array(ctx);
/* [enum_target enum res] */
e = duk_require_hobject(ctx, -2);
DUK_ASSERT(e != NULL);
idx = 0;
for (i = DUK__ENUM_START_INDEX; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(e); i++) {
duk_hstring *k;
k = DUK_HOBJECT_E_GET_KEY(thr->heap, e, i);
DUK_ASSERT(k); /* enumerator must have no keys deleted */
/* [enum_target enum res] */
duk_push_hstring(ctx, k);
duk_put_prop_index(ctx, -2, idx);
idx++;
}
/* [enum_target enum res] */
duk_remove(ctx, -2);
/* [enum_target res] */
return 1; /* return 1 to allow callers to tail call */
}
#line 1 "duk_hobject_finalizer.c"
/*
* Run an duk_hobject finalizer. Used for both reference counting
* and mark-and-sweep algorithms. Must never throw an error.
*
* There is no return value. Any return value or error thrown by
* the finalizer is ignored (although errors are debug logged).
*
* Notes:
*
* - The thread used for calling the finalizer is the same as the
* 'thr' argument. This may need to change later.
*
* - The finalizer thread 'top' assertions are there because it is
* critical that strict stack policy is observed (i.e. no cruft
* left on the finalizer stack).
*/
/* include removed: duk_internal.h */
DUK_LOCAL duk_ret_t duk__finalize_helper(duk_context *ctx) {
duk_hthread *thr;
DUK_ASSERT(ctx != NULL);
thr = (duk_hthread *) ctx;
DUK_DDD(DUK_DDDPRINT("protected finalization helper running"));
/* [... obj] */
/* XXX: Finalizer lookup should traverse the prototype chain (to allow
* inherited finalizers) but should not invoke accessors or proxy object
* behavior. At the moment this lookup will invoke proxy behavior, so
* caller must ensure that this function is not called if the target is
* a Proxy.
*/
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_FINALIZER); /* -> [... obj finalizer] */
if (!duk_is_callable(ctx, -1)) {
DUK_DDD(DUK_DDDPRINT("-> no finalizer or finalizer not callable"));
return 0;
}
duk_dup(ctx, -2);
duk_push_boolean(ctx, DUK_HEAP_HAS_FINALIZER_NORESCUE(thr->heap));
DUK_DDD(DUK_DDDPRINT("-> finalizer found, calling finalizer"));
duk_call(ctx, 2); /* [ ... obj finalizer obj heapDestruct ] -> [ ... obj retval ] */
DUK_DDD(DUK_DDDPRINT("finalizer finished successfully"));
return 0;
/* Note: we rely on duk_safe_call() to fix up the stack for the caller,
* so we don't need to pop stuff here. There is no return value;
* caller determines rescued status based on object refcount.
*/
}
DUK_INTERNAL void duk_hobject_run_finalizer(duk_hthread *thr, duk_hobject *obj) {
duk_context *ctx = (duk_context *) thr;
duk_ret_t rc;
#ifdef DUK_USE_ASSERTIONS
duk_idx_t entry_top;
#endif
DUK_DDD(DUK_DDDPRINT("running object finalizer for object: %p", (void *) obj));
DUK_ASSERT(thr != NULL);
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT_VALSTACK_SPACE(thr, 1);
#ifdef DUK_USE_ASSERTIONS
entry_top = duk_get_top(ctx);
#endif
/*
* Get and call the finalizer. All of this must be wrapped
* in a protected call, because even getting the finalizer
* may trigger an error (getter may throw one, for instance).
*/
DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj));
if (DUK_HEAPHDR_HAS_FINALIZED((duk_heaphdr *) obj)) {
DUK_D(DUK_DPRINT("object already finalized, avoid running finalizer twice: %!O", obj));
return;
}
DUK_HEAPHDR_SET_FINALIZED((duk_heaphdr *) obj); /* ensure never re-entered until rescue cycle complete */
if (DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(obj)) {
/* This shouldn't happen; call sites should avoid looking up
* _Finalizer "through" a Proxy, but ignore if we come here
* with a Proxy to avoid finalizer re-entry.
*/
DUK_D(DUK_DPRINT("object is a proxy, skip finalizer call"));
return;
}
/* XXX: use a NULL error handler for the finalizer call? */
DUK_DDD(DUK_DDDPRINT("-> finalizer found, calling wrapped finalize helper"));
duk_push_hobject(ctx, obj); /* this also increases refcount by one */
rc = duk_safe_call(ctx, duk__finalize_helper, 0 /*nargs*/, 1 /*nrets*/); /* -> [... obj retval/error] */
DUK_ASSERT_TOP(ctx, entry_top + 2); /* duk_safe_call discipline */
if (rc != DUK_EXEC_SUCCESS) {
/* Note: we ask for one return value from duk_safe_call to get this
* error debugging here.
*/
DUK_D(DUK_DPRINT("wrapped finalizer call failed for object %p (ignored); error: %!T",
(void *) obj, (duk_tval *) duk_get_tval(ctx, -1)));
}
duk_pop_2(ctx); /* -> [...] */
DUK_ASSERT_TOP(ctx, entry_top);
}
#line 1 "duk_hobject_misc.c"
/*
* Misc support functions
*/
/* include removed: duk_internal.h */
DUK_INTERNAL duk_bool_t duk_hobject_prototype_chain_contains(duk_hthread *thr, duk_hobject *h, duk_hobject *p, duk_bool_t ignore_loop) {
duk_uint_t sanity;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(h != NULL);
/* allow 'p' to be NULL; then the result is always false */
sanity = DUK_HOBJECT_PROTOTYPE_CHAIN_SANITY;
do {
if (h == p) {
return 1;
}
if (sanity-- == 0) {
if (ignore_loop) {
break;
} else {
DUK_ERROR_RANGE(thr, DUK_STR_PROTOTYPE_CHAIN_LIMIT);
}
}
h = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h);
} while (h);
return 0;
}
DUK_INTERNAL void duk_hobject_set_prototype_updref(duk_hthread *thr, duk_hobject *h, duk_hobject *p) {
#ifdef DUK_USE_REFERENCE_COUNTING
duk_hobject *tmp;
DUK_ASSERT(h);
tmp = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h);
DUK_HOBJECT_SET_PROTOTYPE(thr->heap, h, p);
DUK_HOBJECT_INCREF_ALLOWNULL(thr, p); /* avoid problems if p == h->prototype */
DUK_HOBJECT_DECREF_ALLOWNULL(thr, tmp);
#else
DUK_ASSERT(h);
DUK_UNREF(thr);
DUK_HOBJECT_SET_PROTOTYPE(thr->heap, h, p);
#endif
}
#line 1 "duk_hobject_pc2line.c"
/*
* Helpers for creating and querying pc2line debug data, which
* converts a bytecode program counter to a source line number.
*
* The run-time pc2line data is bit-packed, and documented in:
*
* doc/function-objects.rst
*/
/* include removed: duk_internal.h */
#if defined(DUK_USE_PC2LINE)
/* Generate pc2line data for an instruction sequence, leaving a buffer on stack top. */
DUK_INTERNAL void duk_hobject_pc2line_pack(duk_hthread *thr, duk_compiler_instr *instrs, duk_uint_fast32_t length) {
duk_context *ctx = (duk_context *) thr;
duk_hbuffer_dynamic *h_buf;
duk_bitencoder_ctx be_ctx_alloc;
duk_bitencoder_ctx *be_ctx = &be_ctx_alloc;
duk_uint32_t *hdr;
duk_size_t new_size;
duk_uint_fast32_t num_header_entries;
duk_uint_fast32_t curr_offset;
duk_int_fast32_t curr_line, next_line, diff_line;
duk_uint_fast32_t curr_pc;
duk_uint_fast32_t hdr_index;
DUK_ASSERT(length <= DUK_COMPILER_MAX_BYTECODE_LENGTH);
/* XXX: add proper spare handling to dynamic buffer, to minimize
* reallocs; currently there is no spare at all.
*/
num_header_entries = (length + DUK_PC2LINE_SKIP - 1) / DUK_PC2LINE_SKIP;
curr_offset = (duk_uint_fast32_t) (sizeof(duk_uint32_t) + num_header_entries * sizeof(duk_uint32_t) * 2);
duk_push_dynamic_buffer(ctx, (duk_size_t) curr_offset);
h_buf = (duk_hbuffer_dynamic *) duk_get_hbuffer(ctx, -1);
DUK_ASSERT(h_buf != NULL);
DUK_ASSERT(DUK_HBUFFER_HAS_DYNAMIC(h_buf) && !DUK_HBUFFER_HAS_EXTERNAL(h_buf));
hdr = (duk_uint32_t *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, h_buf);
DUK_ASSERT(hdr != NULL);
hdr[0] = (duk_uint32_t) length; /* valid pc range is [0, length[ */
curr_pc = 0U;
while (curr_pc < length) {
new_size = (duk_size_t) (curr_offset + DUK_PC2LINE_MAX_DIFF_LENGTH);
duk_hbuffer_resize(thr, h_buf, new_size);
hdr = (duk_uint32_t *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, h_buf);
DUK_ASSERT(hdr != NULL);
DUK_ASSERT(curr_pc < length);
hdr_index = 1 + (curr_pc / DUK_PC2LINE_SKIP) * 2;
curr_line = (duk_int_fast32_t) instrs[curr_pc].line;
hdr[hdr_index + 0] = (duk_uint32_t) curr_line;
hdr[hdr_index + 1] = (duk_uint32_t) curr_offset;
#if 0
DUK_DDD(DUK_DDDPRINT("hdr[%ld]: pc=%ld line=%ld offset=%ld",
(long) (curr_pc / DUK_PC2LINE_SKIP),
(long) curr_pc,
(long) hdr[hdr_index + 0],
(long) hdr[hdr_index + 1]));
#endif
DUK_MEMZERO(be_ctx, sizeof(*be_ctx));
be_ctx->data = ((duk_uint8_t *) hdr) + curr_offset;
be_ctx->length = (duk_size_t) DUK_PC2LINE_MAX_DIFF_LENGTH;
for (;;) {
curr_pc++;
if ( ((curr_pc % DUK_PC2LINE_SKIP) == 0) || /* end of diff run */
(curr_pc >= length) ) { /* end of bytecode */
break;
}
DUK_ASSERT(curr_pc < length);
next_line = (duk_int32_t) instrs[curr_pc].line;
diff_line = next_line - curr_line;
#if 0
DUK_DDD(DUK_DDDPRINT("curr_line=%ld, next_line=%ld -> diff_line=%ld",
(long) curr_line, (long) next_line, (long) diff_line));
#endif
if (diff_line == 0) {
/* 0 */
duk_be_encode(be_ctx, 0, 1);
} else if (diff_line >= 1 && diff_line <= 4) {
/* 1 0 <2 bits> */
duk_be_encode(be_ctx, (0x02 << 2) + (diff_line - 1), 4);
} else if (diff_line >= -0x80 && diff_line <= 0x7f) {
/* 1 1 0 <8 bits> */
DUK_ASSERT(diff_line + 0x80 >= 0 && diff_line + 0x80 <= 0xff);
duk_be_encode(be_ctx, (0x06 << 8) + (diff_line + 0x80), 11);
} else {
/* 1 1 1 <32 bits>
* Encode in two parts to avoid bitencode 24-bit limitation
*/
duk_be_encode(be_ctx, (0x07 << 16) + ((next_line >> 16) & 0xffffU), 19);
duk_be_encode(be_ctx, next_line & 0xffffU, 16);
}
curr_line = next_line;
}
duk_be_finish(be_ctx);
DUK_ASSERT(!be_ctx->truncated);
/* be_ctx->offset == length of encoded bitstream */
curr_offset += (duk_uint_fast32_t) be_ctx->offset;
}
/* compact */
new_size = (duk_size_t) curr_offset;
duk_hbuffer_resize(thr, h_buf, new_size);
(void) duk_to_fixed_buffer(ctx, -1, NULL);
DUK_DDD(DUK_DDDPRINT("final pc2line data: pc_limit=%ld, length=%ld, %lf bits/opcode --> %!ixT",
(long) length, (long) new_size, (double) new_size * 8.0 / (double) length,
(duk_tval *) duk_get_tval(ctx, -1)));
}
/* PC is unsigned. If caller does PC arithmetic and gets a negative result,
* it will map to a large PC which is out of bounds and causes a zero to be
* returned.
*/
DUK_LOCAL duk_uint_fast32_t duk__hobject_pc2line_query_raw(duk_hthread *thr, duk_hbuffer_fixed *buf, duk_uint_fast32_t pc) {
duk_bitdecoder_ctx bd_ctx_alloc;
duk_bitdecoder_ctx *bd_ctx = &bd_ctx_alloc;
duk_uint32_t *hdr;
duk_uint_fast32_t start_offset;
duk_uint_fast32_t pc_limit;
duk_uint_fast32_t hdr_index;
duk_uint_fast32_t pc_base;
duk_uint_fast32_t n;
duk_uint_fast32_t curr_line;
DUK_ASSERT(buf != NULL);
DUK_ASSERT(!DUK_HBUFFER_HAS_DYNAMIC((duk_hbuffer *) buf) && !DUK_HBUFFER_HAS_EXTERNAL((duk_hbuffer *) buf));
DUK_UNREF(thr);
/*
* Use the index in the header to find the right starting point
*/
hdr_index = pc / DUK_PC2LINE_SKIP;
pc_base = hdr_index * DUK_PC2LINE_SKIP;
n = pc - pc_base;
if (DUK_HBUFFER_FIXED_GET_SIZE(buf) <= sizeof(duk_uint32_t)) {
DUK_DD(DUK_DDPRINT("pc2line lookup failed: buffer is smaller than minimal header"));
goto error;
}
hdr = (duk_uint32_t *) (void *) DUK_HBUFFER_FIXED_GET_DATA_PTR(thr->heap, buf);
pc_limit = hdr[0];
if (pc >= pc_limit) {
/* Note: pc is unsigned and cannot be negative */
DUK_DD(DUK_DDPRINT("pc2line lookup failed: pc out of bounds (pc=%ld, limit=%ld)",
(long) pc, (long) pc_limit));
goto error;
}
curr_line = hdr[1 + hdr_index * 2];
start_offset = hdr[1 + hdr_index * 2 + 1];
if ((duk_size_t) start_offset > DUK_HBUFFER_FIXED_GET_SIZE(buf)) {
DUK_DD(DUK_DDPRINT("pc2line lookup failed: start_offset out of bounds (start_offset=%ld, buffer_size=%ld)",
(long) start_offset, (long) DUK_HBUFFER_GET_SIZE((duk_hbuffer *) buf)));
goto error;
}
/*
* Iterate the bitstream (line diffs) until PC is reached
*/
DUK_MEMZERO(bd_ctx, sizeof(*bd_ctx));
bd_ctx->data = ((duk_uint8_t *) hdr) + start_offset;
bd_ctx->length = (duk_size_t) (DUK_HBUFFER_FIXED_GET_SIZE(buf) - start_offset);
#if 0
DUK_DDD(DUK_DDDPRINT("pc2line lookup: pc=%ld -> hdr_index=%ld, pc_base=%ld, n=%ld, start_offset=%ld",
(long) pc, (long) hdr_index, (long) pc_base, (long) n, (long) start_offset));
#endif
while (n > 0) {
#if 0
DUK_DDD(DUK_DDDPRINT("lookup: n=%ld, curr_line=%ld", (long) n, (long) curr_line));
#endif
if (duk_bd_decode_flag(bd_ctx)) {
if (duk_bd_decode_flag(bd_ctx)) {
if (duk_bd_decode_flag(bd_ctx)) {
/* 1 1 1 <32 bits> */
duk_uint_fast32_t t;
t = duk_bd_decode(bd_ctx, 16); /* workaround: max nbits = 24 now */
t = (t << 16) + duk_bd_decode(bd_ctx, 16);
curr_line = t;
} else {
/* 1 1 0 <8 bits> */
duk_uint_fast32_t t;
t = duk_bd_decode(bd_ctx, 8);
curr_line = curr_line + t - 0x80;
}
} else {
/* 1 0 <2 bits> */
duk_uint_fast32_t t;
t = duk_bd_decode(bd_ctx, 2);
curr_line = curr_line + t + 1;
}
} else {
/* 0: no change */
}
n--;
}
DUK_DDD(DUK_DDDPRINT("pc2line lookup result: pc %ld -> line %ld", (long) pc, (long) curr_line));
return curr_line;
error:
DUK_D(DUK_DPRINT("pc2line conversion failed for pc=%ld", (long) pc));
return 0;
}
DUK_INTERNAL duk_uint_fast32_t duk_hobject_pc2line_query(duk_context *ctx, duk_idx_t idx_func, duk_uint_fast32_t pc) {
duk_hbuffer_fixed *pc2line;
duk_uint_fast32_t line;
/* XXX: now that pc2line is used by the debugger quite heavily in
* checked execution, this should be optimized to avoid value stack
* and perhaps also implement some form of pc2line caching (see
* future work in debugger.rst).
*/
duk_get_prop_stridx(ctx, idx_func, DUK_STRIDX_INT_PC2LINE);
pc2line = (duk_hbuffer_fixed *) duk_get_hbuffer(ctx, -1);
if (pc2line != NULL) {
DUK_ASSERT(!DUK_HBUFFER_HAS_DYNAMIC((duk_hbuffer *) pc2line) && !DUK_HBUFFER_HAS_EXTERNAL((duk_hbuffer *) pc2line));
line = duk__hobject_pc2line_query_raw((duk_hthread *) ctx, pc2line, (duk_uint_fast32_t) pc);
} else {
line = 0;
}
duk_pop(ctx);
return line;
}
#endif /* DUK_USE_PC2LINE */
#line 1 "duk_hobject_props.c"
/*
* Hobject property set/get functionality.
*
* This is very central functionality for size, performance, and compliance.
* It is also rather intricate; see hobject-algorithms.rst for discussion on
* the algorithms and memory-management.rst for discussion on refcounts and
* side effect issues.
*
* Notes:
*
* - It might be tempting to assert "refcount nonzero" for objects
* being operated on, but that's not always correct: objects with
* a zero refcount may be operated on by the refcount implementation
* (finalization) for instance. Hence, no refcount assertions are made.
*
* - Many operations (memory allocation, identifier operations, etc)
* may cause arbitrary side effects (e.g. through GC and finalization).
* These side effects may invalidate duk_tval pointers which point to
* areas subject to reallocation (like value stack). Heap objects
* themselves have stable pointers. Holding heap object pointers or
* duk_tval copies is not problematic with respect to side effects;
* care must be taken when holding and using argument duk_tval pointers.
*
* - If a finalizer is executed, it may operate on the the same object
* we're currently dealing with. For instance, the finalizer might
* delete a certain property which has already been looked up and
* confirmed to exist. Ideally finalizers would be disabled if GC
* happens during property access. At the moment property table realloc
* disables finalizers, and all DECREFs may cause arbitrary changes so
* handle DECREF carefully.
*
* - The order of operations for a DECREF matters. When DECREF is executed,
* the entire object graph must be consistent; note that a refzero may
* lead to a mark-and-sweep through a refcount finalizer.
*/
/*
* XXX: array indices are mostly typed as duk_uint32_t here; duk_uarridx_t
* might be more appropriate.
*/
/*
* XXX: duk_uint_fast32_t should probably be used in many places here.
*/
/* include removed: duk_internal.h */
/*
* Local defines
*/
#define DUK__NO_ARRAY_INDEX DUK_HSTRING_NO_ARRAY_INDEX
/* hash probe sequence */
#define DUK__HASH_INITIAL(hash,h_size) DUK_HOBJECT_HASH_INITIAL((hash),(h_size))
#define DUK__HASH_PROBE_STEP(hash) DUK_HOBJECT_HASH_PROBE_STEP((hash))
/* marker values for hash part */
#define DUK__HASH_UNUSED DUK_HOBJECT_HASHIDX_UNUSED
#define DUK__HASH_DELETED DUK_HOBJECT_HASHIDX_DELETED
/* valstack space that suffices for all local calls, including recursion
* of other than Duktape calls (getters etc)
*/
#define DUK__VALSTACK_SPACE 10
/* valstack space allocated especially for proxy lookup which does a
* recursive property lookup
*/
#define DUK__VALSTACK_PROXY_LOOKUP 20
/*
* Local prototypes
*/
DUK_LOCAL_DECL duk_bool_t duk__check_arguments_map_for_get(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *temp_desc);
DUK_LOCAL_DECL void duk__check_arguments_map_for_put(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *temp_desc, duk_bool_t throw_flag);
DUK_LOCAL_DECL void duk__check_arguments_map_for_delete(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *temp_desc);
DUK_LOCAL_DECL duk_bool_t duk__handle_put_array_length_smaller(duk_hthread *thr, duk_hobject *obj, duk_uint32_t old_len, duk_uint32_t new_len, duk_bool_t force_flag, duk_uint32_t *out_result_len);
DUK_LOCAL_DECL duk_bool_t duk__handle_put_array_length(duk_hthread *thr, duk_hobject *obj);
DUK_LOCAL_DECL duk_bool_t duk__get_propdesc(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *out_desc, duk_small_uint_t flags);
DUK_LOCAL_DECL duk_bool_t duk__get_own_propdesc_raw(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_uint32_t arr_idx, duk_propdesc *out_desc, duk_small_uint_t flags);
DUK_LOCAL duk_uint32_t duk__get_old_array_length(duk_hthread *thr, duk_hobject *obj, duk_propdesc *temp_desc);
/*
* Misc helpers
*/
/* Convert a duk_tval number (caller checks) to a 32-bit index. Returns
* DUK__NO_ARRAY_INDEX if the number is not whole or not a valid array
* index.
*/
/* XXX: for fastints, could use a variant which assumes a double duk_tval
* (and doesn't need to check for fastint again).
*/
DUK_LOCAL duk_uint32_t duk__tval_number_to_arr_idx(duk_tval *tv) {
duk_double_t dbl;
duk_uint32_t idx;
DUK_ASSERT(tv != NULL);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
/* -0 is accepted here as index 0 because ToString(-0) == "0" which is
* in canonical form and thus an array index.
*/
dbl = DUK_TVAL_GET_NUMBER(tv);
idx = (duk_uint32_t) dbl;
if ((duk_double_t) idx == dbl) {
/* Is whole and within 32 bit range. If the value happens to be 0xFFFFFFFF,
* it's not a valid array index but will then match DUK__NO_ARRAY_INDEX.
*/
return idx;
}
return DUK__NO_ARRAY_INDEX;
}
#if defined(DUK_USE_FASTINT)
/* Convert a duk_tval fastint (caller checks) to a 32-bit index. */
DUK_LOCAL duk_uint32_t duk__tval_fastint_to_arr_idx(duk_tval *tv) {
duk_int64_t t;
DUK_ASSERT(tv != NULL);
DUK_ASSERT(DUK_TVAL_IS_FASTINT(tv));
t = DUK_TVAL_GET_FASTINT(tv);
if ((t & ~0xffffffffULL) != 0) {
/* Catches >0x100000000 and negative values. */
return DUK__NO_ARRAY_INDEX;
}
/* If the value happens to be 0xFFFFFFFF, it's not a valid array index
* but will then match DUK__NO_ARRAY_INDEX.
*/
return (duk_uint32_t) t;
}
#endif /* DUK_USE_FASTINT */
/* Push an arbitrary duk_tval to the stack, coerce it to string, and return
* both a duk_hstring pointer and an array index (or DUK__NO_ARRAY_INDEX).
*/
DUK_LOCAL duk_uint32_t duk__push_tval_to_hstring_arr_idx(duk_context *ctx, duk_tval *tv, duk_hstring **out_h) {
duk_uint32_t arr_idx;
duk_hstring *h;
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(tv != NULL);
DUK_ASSERT(out_h != NULL);
duk_push_tval(ctx, tv);
duk_to_string(ctx, -1);
h = duk_get_hstring(ctx, -1);
DUK_ASSERT(h != NULL);
*out_h = h;
arr_idx = DUK_HSTRING_GET_ARRIDX_FAST(h);
return arr_idx;
}
/* String is an own (virtual) property of a lightfunc. */
DUK_LOCAL duk_bool_t duk__key_is_lightfunc_ownprop(duk_hthread *thr, duk_hstring *key) {
DUK_UNREF(thr);
return (key == DUK_HTHREAD_STRING_LENGTH(thr) ||
key == DUK_HTHREAD_STRING_NAME(thr));
}
/*
* Helpers for managing property storage size
*/
/* Get default hash part size for a certain entry part size. */
#if defined(DUK_USE_HOBJECT_HASH_PART)
DUK_LOCAL duk_uint32_t duk__get_default_h_size(duk_uint32_t e_size) {
DUK_ASSERT(e_size <= DUK_HOBJECT_MAX_PROPERTIES);
if (e_size >= DUK_HOBJECT_E_USE_HASH_LIMIT) {
duk_uint32_t res;
/* result: hash_prime(floor(1.2 * e_size)) */
res = duk_util_get_hash_prime(e_size + e_size / DUK_HOBJECT_H_SIZE_DIVISOR);
/* if fails, e_size will be zero = not an issue, except performance-wise */
DUK_ASSERT(res == 0 || res > e_size);
return res;
} else {
return 0;
}
}
#endif /* USE_PROP_HASH_PART */
/* Get minimum entry part growth for a certain size. */
DUK_LOCAL duk_uint32_t duk__get_min_grow_e(duk_uint32_t e_size) {
duk_uint32_t res;
DUK_ASSERT(e_size <= DUK_HOBJECT_MAX_PROPERTIES);
res = (e_size + DUK_HOBJECT_E_MIN_GROW_ADD) / DUK_HOBJECT_E_MIN_GROW_DIVISOR;
DUK_ASSERT(res >= 1); /* important for callers */
return res;
}
/* Get minimum array part growth for a certain size. */
DUK_LOCAL duk_uint32_t duk__get_min_grow_a(duk_uint32_t a_size) {
duk_uint32_t res;
DUK_ASSERT((duk_size_t) a_size <= DUK_HOBJECT_MAX_PROPERTIES);
res = (a_size + DUK_HOBJECT_A_MIN_GROW_ADD) / DUK_HOBJECT_A_MIN_GROW_DIVISOR;
DUK_ASSERT(res >= 1); /* important for callers */
return res;
}
/* Count actually used entry part entries (non-NULL keys). */
DUK_LOCAL duk_uint32_t duk__count_used_e_keys(duk_hthread *thr, duk_hobject *obj) {
duk_uint_fast32_t i;
duk_uint_fast32_t n = 0;
duk_hstring **e;
DUK_ASSERT(obj != NULL);
DUK_UNREF(thr);
e = DUK_HOBJECT_E_GET_KEY_BASE(thr->heap, obj);
for (i = 0; i < DUK_HOBJECT_GET_ENEXT(obj); i++) {
if (*e++) {
n++;
}
}
return (duk_uint32_t) n;
}
/* Count actually used array part entries and array minimum size.
* NOTE: 'out_min_size' can be computed much faster by starting from the
* end and breaking out early when finding first used entry, but this is
* not needed now.
*/
DUK_LOCAL void duk__compute_a_stats(duk_hthread *thr, duk_hobject *obj, duk_uint32_t *out_used, duk_uint32_t *out_min_size) {
duk_uint_fast32_t i;
duk_uint_fast32_t used = 0;
duk_uint_fast32_t highest_idx = (duk_uint_fast32_t) -1; /* see below */
duk_tval *a;
DUK_ASSERT(obj != NULL);
DUK_ASSERT(out_used != NULL);
DUK_ASSERT(out_min_size != NULL);
DUK_UNREF(thr);
a = DUK_HOBJECT_A_GET_BASE(thr->heap, obj);
for (i = 0; i < DUK_HOBJECT_GET_ASIZE(obj); i++) {
duk_tval *tv = a++;
if (!DUK_TVAL_IS_UNUSED(tv)) {
used++;
highest_idx = i;
}
}
/* Initial value for highest_idx is -1 coerced to unsigned. This
* is a bit odd, but (highest_idx + 1) will then wrap to 0 below
* for out_min_size as intended.
*/
*out_used = used;
*out_min_size = highest_idx + 1; /* 0 if no used entries */
}
/* Check array density and indicate whether or not the array part should be abandoned. */
DUK_LOCAL duk_bool_t duk__abandon_array_density_check(duk_uint32_t a_used, duk_uint32_t a_size) {
/*
* Array abandon check; abandon if:
*
* new_used / new_size < limit
* new_used < limit * new_size || limit is 3 bits fixed point
* new_used < limit' / 8 * new_size || *8
* 8*new_used < limit' * new_size || :8
* new_used < limit' * (new_size / 8)
*
* Here, new_used = a_used, new_size = a_size.
*
* Note: some callers use approximate values for a_used and/or a_size
* (e.g. dropping a '+1' term). This doesn't affect the usefulness
* of the check, but may confuse debugging.
*/
return (a_used < DUK_HOBJECT_A_ABANDON_LIMIT * (a_size >> 3));
}
/* Fast check for extending array: check whether or not a slow density check is required. */
DUK_LOCAL duk_bool_t duk__abandon_array_slow_check_required(duk_uint32_t arr_idx, duk_uint32_t old_size) {
/*
* In a fast check we assume old_size equals old_used (i.e., existing
* array is fully dense).
*
* Slow check if:
*
* (new_size - old_size) / old_size > limit
* new_size - old_size > limit * old_size
* new_size > (1 + limit) * old_size || limit' is 3 bits fixed point
* new_size > (1 + (limit' / 8)) * old_size || * 8
* 8 * new_size > (8 + limit') * old_size || : 8
* new_size > (8 + limit') * (old_size / 8)
* new_size > limit'' * (old_size / 8) || limit'' = 9 -> max 25% increase
* arr_idx + 1 > limit'' * (old_size / 8)
*
* This check doesn't work well for small values, so old_size is rounded
* up for the check (and the '+ 1' of arr_idx can be ignored in practice):
*
* arr_idx > limit'' * ((old_size + 7) / 8)
*/
return (arr_idx > DUK_HOBJECT_A_FAST_RESIZE_LIMIT * ((old_size + 7) >> 3));
}
/*
* Proxy helpers
*/
#if defined(DUK_USE_ES6_PROXY)
DUK_INTERNAL duk_bool_t duk_hobject_proxy_check(duk_hthread *thr, duk_hobject *obj, duk_hobject **out_target, duk_hobject **out_handler) {
duk_tval *tv_target;
duk_tval *tv_handler;
duk_hobject *h_target;
duk_hobject *h_handler;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT(out_target != NULL);
DUK_ASSERT(out_handler != NULL);
/* Caller doesn't need to check exotic proxy behavior (but does so for
* some fast paths).
*/
if (DUK_LIKELY(!DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(obj))) {
return 0;
}
tv_handler = duk_hobject_find_existing_entry_tval_ptr(thr->heap, obj, DUK_HTHREAD_STRING_INT_HANDLER(thr));
if (!tv_handler) {
DUK_ERROR_TYPE(thr, DUK_STR_PROXY_REVOKED);
return 0;
}
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv_handler));
h_handler = DUK_TVAL_GET_OBJECT(tv_handler);
DUK_ASSERT(h_handler != NULL);
*out_handler = h_handler;
tv_handler = NULL; /* avoid issues with relocation */
tv_target = duk_hobject_find_existing_entry_tval_ptr(thr->heap, obj, DUK_HTHREAD_STRING_INT_TARGET(thr));
if (!tv_target) {
DUK_ERROR_TYPE(thr, DUK_STR_PROXY_REVOKED);
return 0;
}
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv_target));
h_target = DUK_TVAL_GET_OBJECT(tv_target);
DUK_ASSERT(h_target != NULL);
*out_target = h_target;
tv_target = NULL; /* avoid issues with relocation */
return 1;
}
#endif /* DUK_USE_ES6_PROXY */
/* Get Proxy target object. If the argument is not a Proxy, return it as is.
* If a Proxy is revoked, an error is thrown.
*/
#if defined(DUK_USE_ES6_PROXY)
DUK_INTERNAL duk_hobject *duk_hobject_resolve_proxy_target(duk_hthread *thr, duk_hobject *obj) {
duk_hobject *h_target;
duk_hobject *h_handler;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(obj != NULL);
/* Resolve Proxy targets until Proxy chain ends. No explicit check for
* a Proxy loop: user code cannot create such a loop without tweaking
* internal properties directly.
*/
while (DUK_UNLIKELY(DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(obj))) {
if (duk_hobject_proxy_check(thr, obj, &h_target, &h_handler)) {
DUK_ASSERT(h_target != NULL);
obj = h_target;
} else {
break;
}
}
DUK_ASSERT(obj != NULL);
return obj;
}
#endif /* DUK_USE_ES6_PROXY */
#if defined(DUK_USE_ES6_PROXY)
DUK_LOCAL duk_bool_t duk__proxy_check_prop(duk_hthread *thr, duk_hobject *obj, duk_small_uint_t stridx_trap, duk_tval *tv_key, duk_hobject **out_target) {
duk_context *ctx = (duk_context *) thr;
duk_hobject *h_handler;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT(tv_key != NULL);
DUK_ASSERT(out_target != NULL);
if (!duk_hobject_proxy_check(thr, obj, out_target, &h_handler)) {
return 0;
}
DUK_ASSERT(*out_target != NULL);
DUK_ASSERT(h_handler != NULL);
/* XXX: At the moment Duktape accesses internal keys like _Finalizer using a
* normal property set/get which would allow a proxy handler to interfere with
* such behavior and to get access to internal key strings. This is not a problem
* as such because internal key strings can be created in other ways too (e.g.
* through buffers). The best fix is to change Duktape internal lookups to
* skip proxy behavior. Until that, internal property accesses bypass the
* proxy and are applied to the target (as if the handler did not exist).
* This has some side effects, see test-bi-proxy-internal-keys.js.
*/
if (DUK_TVAL_IS_STRING(tv_key)) {
duk_hstring *h_key = (duk_hstring *) DUK_TVAL_GET_STRING(tv_key);
DUK_ASSERT(h_key != NULL);
if (DUK_HSTRING_HAS_INTERNAL(h_key)) {
DUK_DDD(DUK_DDDPRINT("internal key, skip proxy handler and apply to target"));
return 0;
}
}
/* The handler is looked up with a normal property lookup; it may be an
* accessor or the handler object itself may be a proxy object. If the
* handler is a proxy, we need to extend the valstack as we make a
* recursive proxy check without a function call in between (in fact
* there is no limit to the potential recursion here).
*
* (For sanity, proxy creation rejects another proxy object as either
* the handler or the target at the moment so recursive proxy cases
* are not realized now.)
*/
/* XXX: C recursion limit if proxies are allowed as handler/target values */
duk_require_stack(ctx, DUK__VALSTACK_PROXY_LOOKUP);
duk_push_hobject(ctx, h_handler);
if (duk_get_prop_stridx(ctx, -1, stridx_trap)) {
/* -> [ ... handler trap ] */
duk_insert(ctx, -2); /* -> [ ... trap handler ] */
/* stack prepped for func call: [ ... trap handler ] */
return 1;
} else {
duk_pop_2(ctx);
return 0;
}
}
#endif /* DUK_USE_ES6_PROXY */
/*
* Reallocate property allocation, moving properties to the new allocation.
*
* Includes key compaction, rehashing, and can also optionally abandoning
* the array part, 'migrating' array entries into the beginning of the
* new entry part. Arguments are not validated here, so e.g. new_h_size
* MUST be a valid prime.
*
* There is no support for in-place reallocation or just compacting keys
* without resizing the property allocation. This is intentional to keep
* code size minimal.
*
* The implementation is relatively straightforward, except for the array
* abandonment process. Array abandonment requires that new string keys
* are interned, which may trigger GC. All keys interned so far must be
* reachable for GC at all times; valstack is used for that now.
*
* Also, a GC triggered during this reallocation process must not interfere
* with the object being resized. This is currently controlled by using
* heap->mark_and_sweep_base_flags to indicate that no finalizers will be
* executed (as they can affect ANY object) and no objects are compacted
* (it would suffice to protect this particular object only, though).
*
* Note: a non-checked variant would be nice but is a bit tricky to
* implement for the array abandonment process. It's easy for
* everything else.
*
* Note: because we need to potentially resize the valstack (as part
* of abandoning the array part), any tval pointers to the valstack
* will become invalid after this call.
*/
DUK_LOCAL
void duk__realloc_props(duk_hthread *thr,
duk_hobject *obj,
duk_uint32_t new_e_size,
duk_uint32_t new_a_size,
duk_uint32_t new_h_size,
duk_bool_t abandon_array) {
duk_context *ctx = (duk_context *) thr;
#ifdef DUK_USE_MARK_AND_SWEEP
duk_small_uint_t prev_mark_and_sweep_base_flags;
#endif
duk_uint32_t new_alloc_size;
duk_uint32_t new_e_size_adjusted;
duk_uint8_t *new_p;
duk_hstring **new_e_k;
duk_propvalue *new_e_pv;
duk_uint8_t *new_e_f;
duk_tval *new_a;
duk_uint32_t *new_h;
duk_uint32_t new_e_next;
duk_uint_fast32_t i;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT(!abandon_array || new_a_size == 0); /* if abandon_array, new_a_size must be 0 */
DUK_ASSERT(DUK_HOBJECT_GET_PROPS(thr->heap, obj) != NULL || (DUK_HOBJECT_GET_ESIZE(obj) == 0 && DUK_HOBJECT_GET_ASIZE(obj) == 0));
DUK_ASSERT(new_h_size == 0 || new_h_size >= new_e_size); /* required to guarantee success of rehashing,
* intentionally use unadjusted new_e_size
*/
DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj));
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
/*
* Pre resize assertions.
*/
#ifdef DUK_USE_ASSERTIONS
/* XXX: pre-checks (such as no duplicate keys) */
#endif
/*
* For property layout 1, tweak e_size to ensure that the whole entry
* part (key + val + flags) is a suitable multiple for alignment
* (platform specific).
*
* Property layout 2 does not require this tweaking and is preferred
* on low RAM platforms requiring alignment.
*/
#if defined(DUK_USE_HOBJECT_LAYOUT_2) || defined(DUK_USE_HOBJECT_LAYOUT_3)
DUK_DDD(DUK_DDDPRINT("using layout 2 or 3, no need to pad e_size: %ld", (long) new_e_size));
new_e_size_adjusted = new_e_size;
#elif defined(DUK_USE_HOBJECT_LAYOUT_1) && (DUK_HOBJECT_ALIGN_TARGET == 1)
DUK_DDD(DUK_DDDPRINT("using layout 1, but no need to pad e_size: %ld", (long) new_e_size));
new_e_size_adjusted = new_e_size;
#elif defined(DUK_USE_HOBJECT_LAYOUT_1) && ((DUK_HOBJECT_ALIGN_TARGET == 4) || (DUK_HOBJECT_ALIGN_TARGET == 8))
new_e_size_adjusted = (new_e_size + DUK_HOBJECT_ALIGN_TARGET - 1) & (~(DUK_HOBJECT_ALIGN_TARGET - 1));
DUK_DDD(DUK_DDDPRINT("using layout 1, and alignment target is %ld, adjusted e_size: %ld -> %ld",
(long) DUK_HOBJECT_ALIGN_TARGET, (long) new_e_size, (long) new_e_size_adjusted));
DUK_ASSERT(new_e_size_adjusted >= new_e_size);
#else
#error invalid hobject layout defines
#endif
/*
* Debug logging after adjustment.
*/
DUK_DDD(DUK_DDDPRINT("attempt to resize hobject %p props (%ld -> %ld bytes), from {p=%p,e_size=%ld,e_next=%ld,a_size=%ld,h_size=%ld} to "
"{e_size=%ld,a_size=%ld,h_size=%ld}, abandon_array=%ld, unadjusted new_e_size=%ld",
(void *) obj,
(long) DUK_HOBJECT_P_COMPUTE_SIZE(DUK_HOBJECT_GET_ESIZE(obj),
DUK_HOBJECT_GET_ASIZE(obj),
DUK_HOBJECT_GET_HSIZE(obj)),
(long) DUK_HOBJECT_P_COMPUTE_SIZE(new_e_size_adjusted, new_a_size, new_h_size),
(void *) DUK_HOBJECT_GET_PROPS(thr->heap, obj),
(long) DUK_HOBJECT_GET_ESIZE(obj),
(long) DUK_HOBJECT_GET_ENEXT(obj),
(long) DUK_HOBJECT_GET_ASIZE(obj),
(long) DUK_HOBJECT_GET_HSIZE(obj),
(long) new_e_size_adjusted,
(long) new_a_size,
(long) new_h_size,
(long) abandon_array,
(long) new_e_size));
/*
* Property count check. This is the only point where we ensure that
* we don't get more (allocated) property space that we can handle.
* There aren't hard limits as such, but some algorithms fail (e.g.
* finding next higher prime, selecting hash part size) if we get too
* close to the 4G property limit.
*
* Since this works based on allocation size (not actually used size),
* the limit is a bit approximate but good enough in practice.
*/
if (new_e_size_adjusted + new_a_size > DUK_HOBJECT_MAX_PROPERTIES) {
DUK_ERROR_ALLOC_DEFMSG(thr);
}
/*
* Compute new alloc size and alloc new area.
*
* The new area is allocated as a dynamic buffer and placed into the
* valstack for reachability. The actual buffer is then detached at
* the end.
*
* Note: heap_mark_and_sweep_base_flags are altered here to ensure
* no-one touches this object while we're resizing and rehashing it.
* The flags must be reset on every exit path after it. Finalizers
* and compaction is prevented currently for all objects while it
* would be enough to restrict it only for the current object.
*/
#ifdef DUK_USE_MARK_AND_SWEEP
prev_mark_and_sweep_base_flags = thr->heap->mark_and_sweep_base_flags;
thr->heap->mark_and_sweep_base_flags |=
DUK_MS_FLAG_NO_FINALIZERS | /* avoid attempts to add/remove object keys */
DUK_MS_FLAG_NO_OBJECT_COMPACTION; /* avoid attempt to compact the current object */
#endif
new_alloc_size = DUK_HOBJECT_P_COMPUTE_SIZE(new_e_size_adjusted, new_a_size, new_h_size);
DUK_DDD(DUK_DDDPRINT("new hobject allocation size is %ld", (long) new_alloc_size));
if (new_alloc_size == 0) {
/* for zero size, don't push anything on valstack */
DUK_ASSERT(new_e_size_adjusted == 0);
DUK_ASSERT(new_a_size == 0);
DUK_ASSERT(new_h_size == 0);
new_p = NULL;
} else {
/* This may trigger mark-and-sweep with arbitrary side effects,
* including an attempted resize of the object we're resizing,
* executing a finalizer which may add or remove properties of
* the object we're resizing etc.
*/
/* Note: buffer is dynamic so that we can 'steal' the actual
* allocation later.
*/
new_p = (duk_uint8_t *) duk_push_dynamic_buffer(ctx, new_alloc_size); /* errors out if out of memory */
DUK_ASSERT(new_p != NULL); /* since new_alloc_size > 0 */
}
/* Set up pointers to the new property area: this is hidden behind a macro
* because it is memory layout specific.
*/
DUK_HOBJECT_P_SET_REALLOC_PTRS(new_p, new_e_k, new_e_pv, new_e_f, new_a, new_h,
new_e_size_adjusted, new_a_size, new_h_size);
DUK_UNREF(new_h); /* happens when hash part dropped */
new_e_next = 0;
/* if new_p == NULL, all of these pointers are NULL */
DUK_ASSERT((new_p != NULL) ||
(new_e_k == NULL && new_e_pv == NULL && new_e_f == NULL &&
new_a == NULL && new_h == NULL));
DUK_DDD(DUK_DDDPRINT("new alloc size %ld, new_e_k=%p, new_e_pv=%p, new_e_f=%p, new_a=%p, new_h=%p",
(long) new_alloc_size, (void *) new_e_k, (void *) new_e_pv, (void *) new_e_f,
(void *) new_a, (void *) new_h));
/*
* Migrate array to start of entries if requested.
*
* Note: from an enumeration perspective the order of entry keys matters.
* Array keys should appear wherever they appeared before the array abandon
* operation.
*/
if (abandon_array) {
/*
* Note: assuming new_a_size == 0, and that entry part contains
* no conflicting keys, refcounts do not need to be adjusted for
* the values, as they remain exactly the same.
*
* The keys, however, need to be interned, incref'd, and be
* reachable for GC. Any intern attempt may trigger a GC and
* claim any non-reachable strings, so every key must be reachable
* at all times.
*
* A longjmp must not occur here, as the new_p allocation would
* be freed without these keys being decref'd, hence the messy
* decref handling if intern fails.
*/
DUK_ASSERT(new_a_size == 0);
for (i = 0; i < DUK_HOBJECT_GET_ASIZE(obj); i++) {
duk_tval *tv1;
duk_tval *tv2;
duk_hstring *key;
DUK_ASSERT(DUK_HOBJECT_GET_PROPS(thr->heap, obj) != NULL);
tv1 = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, i);
if (DUK_TVAL_IS_UNUSED(tv1)) {
continue;
}
DUK_ASSERT(new_p != NULL && new_e_k != NULL &&
new_e_pv != NULL && new_e_f != NULL);
/*
* Intern key via the valstack to ensure reachability behaves
* properly. We must avoid longjmp's here so use non-checked
* primitives.
*
* Note: duk_check_stack() potentially reallocs the valstack,
* invalidating any duk_tval pointers to valstack. Callers
* must be careful.
*/
/* never shrinks; auto-adds DUK_VALSTACK_INTERNAL_EXTRA, which is generous */
if (!duk_check_stack(ctx, 1)) {
goto abandon_error;
}
DUK_ASSERT_VALSTACK_SPACE(thr, 1);
key = duk_heap_string_intern_u32(thr->heap, i);
if (!key) {
goto abandon_error;
}
duk_push_hstring(ctx, key); /* keep key reachable for GC etc; guaranteed not to fail */
/* key is now reachable in the valstack */
DUK_HSTRING_INCREF(thr, key); /* second incref for the entry reference */
new_e_k[new_e_next] = key;
tv2 = &new_e_pv[new_e_next].v; /* array entries are all plain values */
DUK_TVAL_SET_TVAL(tv2, tv1);
new_e_f[new_e_next] = DUK_PROPDESC_FLAG_WRITABLE |
DUK_PROPDESC_FLAG_ENUMERABLE |
DUK_PROPDESC_FLAG_CONFIGURABLE;
new_e_next++;
/* Note: new_e_next matches pushed temp key count, and nothing can
* fail above between the push and this point.
*/
}
DUK_DDD(DUK_DDDPRINT("abandon array: pop %ld key temps from valstack", (long) new_e_next));
duk_pop_n(ctx, new_e_next);
}
/*
* Copy keys and values in the entry part (compacting them at the same time).
*/
for (i = 0; i < DUK_HOBJECT_GET_ENEXT(obj); i++) {
duk_hstring *key;
DUK_ASSERT(DUK_HOBJECT_GET_PROPS(thr->heap, obj) != NULL);
key = DUK_HOBJECT_E_GET_KEY(thr->heap, obj, i);
if (!key) {
continue;
}
DUK_ASSERT(new_p != NULL && new_e_k != NULL &&
new_e_pv != NULL && new_e_f != NULL);
new_e_k[new_e_next] = key;
new_e_pv[new_e_next] = DUK_HOBJECT_E_GET_VALUE(thr->heap, obj, i);
new_e_f[new_e_next] = DUK_HOBJECT_E_GET_FLAGS(thr->heap, obj, i);
new_e_next++;
}
/* the entries [new_e_next, new_e_size_adjusted[ are left uninitialized on purpose (ok, not gc reachable) */
/*
* Copy array elements to new array part.
*/
if (new_a_size > DUK_HOBJECT_GET_ASIZE(obj)) {
/* copy existing entries as is */
DUK_ASSERT(new_p != NULL && new_a != NULL);
if (DUK_HOBJECT_GET_ASIZE(obj) > 0) {
/* Avoid zero copy with an invalid pointer. If obj->p is NULL,
* the 'new_a' pointer will be invalid which is not allowed even
* when copy size is zero.
*/
DUK_ASSERT(DUK_HOBJECT_GET_PROPS(thr->heap, obj) != NULL);
DUK_ASSERT(DUK_HOBJECT_GET_ASIZE(obj) > 0);
DUK_MEMCPY((void *) new_a, (void *) DUK_HOBJECT_A_GET_BASE(thr->heap, obj), sizeof(duk_tval) * DUK_HOBJECT_GET_ASIZE(obj));
}
/* fill new entries with -unused- (required, gc reachable) */
for (i = DUK_HOBJECT_GET_ASIZE(obj); i < new_a_size; i++) {
duk_tval *tv = &new_a[i];
DUK_TVAL_SET_UNUSED(tv);
}
} else {
#ifdef DUK_USE_ASSERTIONS
/* caller must have decref'd values above new_a_size (if that is necessary) */
if (!abandon_array) {
for (i = new_a_size; i < DUK_HOBJECT_GET_ASIZE(obj); i++) {
duk_tval *tv;
tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, i);
/* current assertion is quite strong: decref's and set to unused */
DUK_ASSERT(DUK_TVAL_IS_UNUSED(tv));
}
}
#endif
if (new_a_size > 0) {
/* Avoid zero copy with an invalid pointer. If obj->p is NULL,
* the 'new_a' pointer will be invalid which is not allowed even
* when copy size is zero.
*/
DUK_ASSERT(DUK_HOBJECT_GET_PROPS(thr->heap, obj) != NULL);
DUK_ASSERT(new_a_size > 0);
DUK_MEMCPY((void *) new_a, (void *) DUK_HOBJECT_A_GET_BASE(thr->heap, obj), sizeof(duk_tval) * new_a_size);
}
}
/*
* Rebuild the hash part always from scratch (guaranteed to finish).
*
* Any resize of hash part requires rehashing. In addition, by rehashing
* get rid of any elements marked deleted (DUK__HASH_DELETED) which is critical
* to ensuring the hash part never fills up.
*/
#if defined(DUK_USE_HOBJECT_HASH_PART)
if (DUK_UNLIKELY(new_h_size > 0)) {
DUK_ASSERT(new_h != NULL);
/* fill new_h with u32 0xff = UNUSED */
DUK_ASSERT(DUK_HOBJECT_GET_PROPS(thr->heap, obj) != NULL);
DUK_ASSERT(new_h_size > 0);
DUK_MEMSET(new_h, 0xff, sizeof(duk_uint32_t) * new_h_size);
DUK_ASSERT(new_e_next <= new_h_size); /* equality not actually possible */
for (i = 0; i < new_e_next; i++) {
duk_hstring *key = new_e_k[i];
duk_uint32_t j, step;
DUK_ASSERT(key != NULL);
j = DUK__HASH_INITIAL(DUK_HSTRING_GET_HASH(key), new_h_size);
step = DUK__HASH_PROBE_STEP(DUK_HSTRING_GET_HASH(key));
for (;;) {
DUK_ASSERT(new_h[j] != DUK__HASH_DELETED); /* should never happen */
if (new_h[j] == DUK__HASH_UNUSED) {
DUK_DDD(DUK_DDDPRINT("rebuild hit %ld -> %ld", (long) j, (long) i));
new_h[j] = i;
break;
}
DUK_DDD(DUK_DDDPRINT("rebuild miss %ld, step %ld", (long) j, (long) step));
j = (j + step) % new_h_size;
/* guaranteed to finish */
DUK_ASSERT(j != (duk_uint32_t) DUK__HASH_INITIAL(DUK_HSTRING_GET_HASH(key), new_h_size));
}
}
} else {
DUK_DDD(DUK_DDDPRINT("no hash part, no rehash"));
}
#endif /* DUK_USE_HOBJECT_HASH_PART */
/*
* Nice debug log.
*/
DUK_DD(DUK_DDPRINT("resized hobject %p props (%ld -> %ld bytes), from {p=%p,e_size=%ld,e_next=%ld,a_size=%ld,h_size=%ld} to "
"{p=%p,e_size=%ld,e_next=%ld,a_size=%ld,h_size=%ld}, abandon_array=%ld, unadjusted new_e_size=%ld",
(void *) obj,
(long) DUK_HOBJECT_P_COMPUTE_SIZE(DUK_HOBJECT_GET_ESIZE(obj),
DUK_HOBJECT_GET_ASIZE(obj),
DUK_HOBJECT_GET_HSIZE(obj)),
(long) new_alloc_size,
(void *) DUK_HOBJECT_GET_PROPS(thr->heap, obj),
(long) DUK_HOBJECT_GET_ESIZE(obj),
(long) DUK_HOBJECT_GET_ENEXT(obj),
(long) DUK_HOBJECT_GET_ASIZE(obj),
(long) DUK_HOBJECT_GET_HSIZE(obj),
(void *) new_p,
(long) new_e_size_adjusted,
(long) new_e_next,
(long) new_a_size,
(long) new_h_size,
(long) abandon_array,
(long) new_e_size));
/*
* All done, switch properties ('p') allocation to new one.
*/
DUK_FREE(thr->heap, DUK_HOBJECT_GET_PROPS(thr->heap, obj)); /* NULL obj->p is OK */
DUK_HOBJECT_SET_PROPS(thr->heap, obj, new_p);
DUK_HOBJECT_SET_ESIZE(obj, new_e_size_adjusted);
DUK_HOBJECT_SET_ENEXT(obj, new_e_next);
DUK_HOBJECT_SET_ASIZE(obj, new_a_size);
DUK_HOBJECT_SET_HSIZE(obj, new_h_size);
if (new_p) {
/*
* Detach actual buffer from dynamic buffer in valstack, and
* pop it from the stack.
*
* XXX: the buffer object is certainly not reachable at this point,
* so it would be nice to free it forcibly even with only
* mark-and-sweep enabled. Not a big issue though.
*/
(void) duk_steal_buffer(ctx, -1, NULL);
duk_pop(ctx);
} else {
DUK_ASSERT(new_alloc_size == 0);
/* no need to pop, nothing was pushed */
}
/* clear array part flag only after switching */
if (abandon_array) {
DUK_HOBJECT_CLEAR_ARRAY_PART(obj);
}
DUK_DDD(DUK_DDDPRINT("resize result: %!O", (duk_heaphdr *) obj));
#ifdef DUK_USE_MARK_AND_SWEEP
thr->heap->mark_and_sweep_base_flags = prev_mark_and_sweep_base_flags;
#endif
/*
* Post resize assertions.
*/
#ifdef DUK_USE_ASSERTIONS
/* XXX: post-checks (such as no duplicate keys) */
#endif
return;
/*
* Abandon array failed, need to decref keys already inserted
* into the beginning of new_e_k before unwinding valstack.
*/
abandon_error:
DUK_D(DUK_DPRINT("hobject resize failed during abandon array, decref keys"));
i = new_e_next;
while (i > 0) {
i--;
DUK_ASSERT(new_e_k != NULL);
DUK_ASSERT(new_e_k[i] != NULL);
DUK_HSTRING_DECREF(thr, new_e_k[i]); /* side effects */
}
#ifdef DUK_USE_MARK_AND_SWEEP
thr->heap->mark_and_sweep_base_flags = prev_mark_and_sweep_base_flags;
#endif
DUK_ERROR_ALLOC_DEFMSG(thr);
}
/*
* Helpers to resize properties allocation on specific needs.
*/
/* Grow entry part allocation for one additional entry. */
DUK_LOCAL void duk__grow_props_for_new_entry_item(duk_hthread *thr, duk_hobject *obj) {
duk_uint32_t old_e_used; /* actually used, non-NULL entries */
duk_uint32_t new_e_size;
duk_uint32_t new_a_size;
duk_uint32_t new_h_size;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(obj != NULL);
/* Duktape 0.11.0 and prior tried to optimize the resize by not
* counting the number of actually used keys prior to the resize.
* This worked mostly well but also caused weird leak-like behavior
* as in: test-bug-object-prop-alloc-unbounded.js. So, now we count
* the keys explicitly to compute the new entry part size.
*/
old_e_used = duk__count_used_e_keys(thr, obj);
new_e_size = old_e_used + duk__get_min_grow_e(old_e_used);
#if defined(DUK_USE_HOBJECT_HASH_PART)
new_h_size = duk__get_default_h_size(new_e_size);
#else
new_h_size = 0;
#endif
new_a_size = DUK_HOBJECT_GET_ASIZE(obj);
DUK_ASSERT(new_e_size >= old_e_used + 1); /* duk__get_min_grow_e() is always >= 1 */
duk__realloc_props(thr, obj, new_e_size, new_a_size, new_h_size, 0);
}
/* Grow array part for a new highest array index. */
DUK_LOCAL void duk__grow_props_for_array_item(duk_hthread *thr, duk_hobject *obj, duk_uint32_t highest_arr_idx) {
duk_uint32_t new_e_size;
duk_uint32_t new_a_size;
duk_uint32_t new_h_size;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT(highest_arr_idx >= DUK_HOBJECT_GET_ASIZE(obj));
/* minimum new length is highest_arr_idx + 1 */
new_e_size = DUK_HOBJECT_GET_ESIZE(obj);
new_h_size = DUK_HOBJECT_GET_HSIZE(obj);
new_a_size = highest_arr_idx + duk__get_min_grow_a(highest_arr_idx);
DUK_ASSERT(new_a_size >= highest_arr_idx + 1); /* duk__get_min_grow_a() is always >= 1 */
duk__realloc_props(thr, obj, new_e_size, new_a_size, new_h_size, 0);
}
/* Abandon array part, moving array entries into entries part.
* This requires a props resize, which is a heavy operation.
* We also compact the entries part while we're at it, although
* this is not strictly required.
*/
DUK_LOCAL void duk__abandon_array_checked(duk_hthread *thr, duk_hobject *obj) {
duk_uint32_t new_e_size;
duk_uint32_t new_a_size;
duk_uint32_t new_h_size;
duk_uint32_t e_used; /* actually used, non-NULL keys */
duk_uint32_t a_used;
duk_uint32_t a_size;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(obj != NULL);
e_used = duk__count_used_e_keys(thr, obj);
duk__compute_a_stats(thr, obj, &a_used, &a_size);
/*
* Must guarantee all actually used array entries will fit into
* new entry part. Add one growth step to ensure we don't run out
* of space right away.
*/
new_e_size = e_used + a_used;
new_e_size = new_e_size + duk__get_min_grow_e(new_e_size);
new_a_size = 0;
#if defined(DUK_USE_HOBJECT_HASH_PART)
new_h_size = duk__get_default_h_size(new_e_size);
#else
new_h_size = 0;
#endif
DUK_DD(DUK_DDPRINT("abandon array part for hobject %p, "
"array stats before: e_used=%ld, a_used=%ld, a_size=%ld; "
"resize to e_size=%ld, a_size=%ld, h_size=%ld",
(void *) obj, (long) e_used, (long) a_used, (long) a_size,
(long) new_e_size, (long) new_a_size, (long) new_h_size));
duk__realloc_props(thr, obj, new_e_size, new_a_size, new_h_size, 1);
}
/*
* Compact an object. Minimizes allocation size for objects which are
* not likely to be extended. This is useful for internal and non-
* extensible objects, but can also be called for non-extensible objects.
* May abandon the array part if it is computed to be too sparse.
*
* This call is relatively expensive, as it needs to scan both the
* entries and the array part.
*
* The call may fail due to allocation error.
*/
DUK_INTERNAL void duk_hobject_compact_props(duk_hthread *thr, duk_hobject *obj) {
duk_uint32_t e_size; /* currently used -> new size */
duk_uint32_t a_size; /* currently required */
duk_uint32_t a_used; /* actually used */
duk_uint32_t h_size;
duk_bool_t abandon_array;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(obj != NULL);
#if defined(DUK_USE_ROM_OBJECTS)
if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)) {
DUK_DD(DUK_DDPRINT("ignore attempt to compact a rom object"));
return;
}
#endif
e_size = duk__count_used_e_keys(thr, obj);
duk__compute_a_stats(thr, obj, &a_used, &a_size);
DUK_DD(DUK_DDPRINT("compacting hobject, used e keys %ld, used a keys %ld, min a size %ld, "
"resized array density would be: %ld/%ld = %lf",
(long) e_size, (long) a_used, (long) a_size,
(long) a_used, (long) a_size,
(double) a_used / (double) a_size));
if (duk__abandon_array_density_check(a_used, a_size)) {
DUK_DD(DUK_DDPRINT("decided to abandon array during compaction, a_used=%ld, a_size=%ld",
(long) a_used, (long) a_size));
abandon_array = 1;
e_size += a_used;
a_size = 0;
} else {
DUK_DD(DUK_DDPRINT("decided to keep array during compaction"));
abandon_array = 0;
}
#if defined(DUK_USE_HOBJECT_HASH_PART)
if (e_size >= DUK_HOBJECT_E_USE_HASH_LIMIT) {
h_size = duk__get_default_h_size(e_size);
} else {
h_size = 0;
}
#else
h_size = 0;
#endif
DUK_DD(DUK_DDPRINT("compacting hobject -> new e_size %ld, new a_size=%ld, new h_size=%ld, abandon_array=%ld",
(long) e_size, (long) a_size, (long) h_size, (long) abandon_array));
duk__realloc_props(thr, obj, e_size, a_size, h_size, abandon_array);
}
/*
* Find an existing key from entry part either by linear scan or by
* using the hash index (if it exists).
*
* Sets entry index (and possibly the hash index) to output variables,
* which allows the caller to update the entry and hash entries in-place.
* If entry is not found, both values are set to -1. If entry is found
* but there is no hash part, h_idx is set to -1.
*/
DUK_INTERNAL void duk_hobject_find_existing_entry(duk_heap *heap, duk_hobject *obj, duk_hstring *key, duk_int_t *e_idx, duk_int_t *h_idx) {
DUK_ASSERT(obj != NULL);
DUK_ASSERT(key != NULL);
DUK_ASSERT(e_idx != NULL);
DUK_ASSERT(h_idx != NULL);
DUK_UNREF(heap);
if (DUK_LIKELY(DUK_HOBJECT_GET_HSIZE(obj) == 0))
{
/* Linear scan: more likely because most objects are small.
* This is an important fast path.
*
* XXX: this might be worth inlining for property lookups.
*/
duk_uint_fast32_t i;
duk_uint_fast32_t n;
duk_hstring **h_keys_base;
DUK_DDD(DUK_DDDPRINT("duk_hobject_find_existing_entry() using linear scan for lookup"));
h_keys_base = DUK_HOBJECT_E_GET_KEY_BASE(heap, obj);
n = DUK_HOBJECT_GET_ENEXT(obj);
for (i = 0; i < n; i++) {
if (h_keys_base[i] == key) {
*e_idx = i;
*h_idx = -1;
return;
}
}
}
#if defined(DUK_USE_HOBJECT_HASH_PART)
else
{
/* hash lookup */
duk_uint32_t n;
duk_uint32_t i, step;
duk_uint32_t *h_base;
DUK_DDD(DUK_DDDPRINT("duk_hobject_find_existing_entry() using hash part for lookup"));
h_base = DUK_HOBJECT_H_GET_BASE(heap, obj);
n = DUK_HOBJECT_GET_HSIZE(obj);
i = DUK__HASH_INITIAL(DUK_HSTRING_GET_HASH(key), n);
step = DUK__HASH_PROBE_STEP(DUK_HSTRING_GET_HASH(key));
for (;;) {
duk_uint32_t t;
DUK_ASSERT_DISABLE(i >= 0); /* unsigned */
DUK_ASSERT(i < DUK_HOBJECT_GET_HSIZE(obj));
t = h_base[i];
DUK_ASSERT(t == DUK__HASH_UNUSED || t == DUK__HASH_DELETED ||
(t < DUK_HOBJECT_GET_ESIZE(obj))); /* t >= 0 always true, unsigned */
if (t == DUK__HASH_UNUSED) {
break;
} else if (t == DUK__HASH_DELETED) {
DUK_DDD(DUK_DDDPRINT("lookup miss (deleted) i=%ld, t=%ld",
(long) i, (long) t));
} else {
DUK_ASSERT(t < DUK_HOBJECT_GET_ESIZE(obj));
if (DUK_HOBJECT_E_GET_KEY(heap, obj, t) == key) {
DUK_DDD(DUK_DDDPRINT("lookup hit i=%ld, t=%ld -> key %p",
(long) i, (long) t, (void *) key));
*e_idx = t;
*h_idx = i;
return;
}
DUK_DDD(DUK_DDDPRINT("lookup miss i=%ld, t=%ld",
(long) i, (long) t));
}
i = (i + step) % n;
/* guaranteed to finish, as hash is never full */
DUK_ASSERT(i != (duk_uint32_t) DUK__HASH_INITIAL(DUK_HSTRING_GET_HASH(key), n));
}
}
#endif /* DUK_USE_HOBJECT_HASH_PART */
/* not found */
*e_idx = -1;
*h_idx = -1;
}
/* For internal use: get non-accessor entry value */
DUK_INTERNAL duk_tval *duk_hobject_find_existing_entry_tval_ptr(duk_heap *heap, duk_hobject *obj, duk_hstring *key) {
duk_int_t e_idx;
duk_int_t h_idx;
DUK_ASSERT(obj != NULL);
DUK_ASSERT(key != NULL);
DUK_UNREF(heap);
duk_hobject_find_existing_entry(heap, obj, key, &e_idx, &h_idx);
if (e_idx >= 0 && !DUK_HOBJECT_E_SLOT_IS_ACCESSOR(heap, obj, e_idx)) {
return DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(heap, obj, e_idx);
} else {
return NULL;
}
}
/* For internal use: get non-accessor entry value and attributes */
DUK_INTERNAL duk_tval *duk_hobject_find_existing_entry_tval_ptr_and_attrs(duk_heap *heap, duk_hobject *obj, duk_hstring *key, duk_int_t *out_attrs) {
duk_int_t e_idx;
duk_int_t h_idx;
DUK_ASSERT(obj != NULL);
DUK_ASSERT(key != NULL);
DUK_ASSERT(out_attrs != NULL);
DUK_UNREF(heap);
duk_hobject_find_existing_entry(heap, obj, key, &e_idx, &h_idx);
if (e_idx >= 0 && !DUK_HOBJECT_E_SLOT_IS_ACCESSOR(heap, obj, e_idx)) {
*out_attrs = DUK_HOBJECT_E_GET_FLAGS(heap, obj, e_idx);
return DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(heap, obj, e_idx);
} else {
*out_attrs = 0;
return NULL;
}
}
/* For internal use: get array part value */
DUK_INTERNAL duk_tval *duk_hobject_find_existing_array_entry_tval_ptr(duk_heap *heap, duk_hobject *obj, duk_uarridx_t i) {
duk_tval *tv;
DUK_ASSERT(obj != NULL);
DUK_UNREF(heap);
if (!DUK_HOBJECT_HAS_ARRAY_PART(obj)) {
return NULL;
}
if (i >= DUK_HOBJECT_GET_ASIZE(obj)) {
return NULL;
}
tv = DUK_HOBJECT_A_GET_VALUE_PTR(heap, obj, i);
return tv;
}
/*
* Allocate and initialize a new entry, resizing the properties allocation
* if necessary. Returns entry index (e_idx) or throws an error if alloc fails.
*
* Sets the key of the entry (increasing the key's refcount), and updates
* the hash part if it exists. Caller must set value and flags, and update
* the entry value refcount. A decref for the previous value is not necessary.
*/
DUK_LOCAL duk_bool_t duk__alloc_entry_checked(duk_hthread *thr, duk_hobject *obj, duk_hstring *key) {
duk_uint32_t idx;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT(key != NULL);
DUK_ASSERT(DUK_HOBJECT_GET_ENEXT(obj) <= DUK_HOBJECT_GET_ESIZE(obj));
#ifdef DUK_USE_ASSERTIONS
/* key must not already exist in entry part */
{
duk_uint_fast32_t i;
for (i = 0; i < DUK_HOBJECT_GET_ENEXT(obj); i++) {
DUK_ASSERT(DUK_HOBJECT_E_GET_KEY(thr->heap, obj, i) != key);
}
}
#endif
if (DUK_HOBJECT_GET_ENEXT(obj) >= DUK_HOBJECT_GET_ESIZE(obj)) {
/* only need to guarantee 1 more slot, but allocation growth is in chunks */
DUK_DDD(DUK_DDDPRINT("entry part full, allocate space for one more entry"));
duk__grow_props_for_new_entry_item(thr, obj);
}
DUK_ASSERT(DUK_HOBJECT_GET_ENEXT(obj) < DUK_HOBJECT_GET_ESIZE(obj));
idx = DUK_HOBJECT_POSTINC_ENEXT(obj);
/* previous value is assumed to be garbage, so don't touch it */
DUK_HOBJECT_E_SET_KEY(thr->heap, obj, idx, key);
DUK_HSTRING_INCREF(thr, key);
#if defined(DUK_USE_HOBJECT_HASH_PART)
if (DUK_UNLIKELY(DUK_HOBJECT_GET_HSIZE(obj) > 0)) {
duk_uint32_t n;
duk_uint32_t i, step;
duk_uint32_t *h_base = DUK_HOBJECT_H_GET_BASE(thr->heap, obj);
n = DUK_HOBJECT_GET_HSIZE(obj);
i = DUK__HASH_INITIAL(DUK_HSTRING_GET_HASH(key), n);
step = DUK__HASH_PROBE_STEP(DUK_HSTRING_GET_HASH(key));
for (;;) {
duk_uint32_t t = h_base[i];
if (t == DUK__HASH_UNUSED || t == DUK__HASH_DELETED) {
DUK_DDD(DUK_DDDPRINT("duk__alloc_entry_checked() inserted key into hash part, %ld -> %ld",
(long) i, (long) idx));
DUK_ASSERT_DISABLE(i >= 0); /* unsigned */
DUK_ASSERT(i < DUK_HOBJECT_GET_HSIZE(obj));
DUK_ASSERT_DISABLE(idx >= 0);
DUK_ASSERT(idx < DUK_HOBJECT_GET_ESIZE(obj));
h_base[i] = idx;
break;
}
DUK_DDD(DUK_DDDPRINT("duk__alloc_entry_checked() miss %ld", (long) i));
i = (i + step) % n;
/* guaranteed to find an empty slot */
DUK_ASSERT(i != (duk_uint32_t) DUK__HASH_INITIAL(DUK_HSTRING_GET_HASH(key), DUK_HOBJECT_GET_HSIZE(obj)));
}
}
#endif /* DUK_USE_HOBJECT_HASH_PART */
/* Note: we could return the hash index here too, but it's not
* needed right now.
*/
DUK_ASSERT_DISABLE(idx >= 0);
DUK_ASSERT(idx < DUK_HOBJECT_GET_ESIZE(obj));
DUK_ASSERT(idx < DUK_HOBJECT_GET_ENEXT(obj));
return idx;
}
/*
* Object internal value
*
* Returned value is guaranteed to be reachable / incref'd, caller does not need
* to incref OR decref. No proxies or accessors are invoked, no prototype walk.
*/
DUK_INTERNAL duk_bool_t duk_hobject_get_internal_value(duk_heap *heap, duk_hobject *obj, duk_tval *tv_out) {
duk_int_t e_idx;
duk_int_t h_idx;
DUK_ASSERT(heap != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT(tv_out != NULL);
/* always in entry part, no need to look up parents etc */
duk_hobject_find_existing_entry(heap, obj, DUK_HEAP_STRING_INT_VALUE(heap), &e_idx, &h_idx);
if (e_idx >= 0) {
DUK_ASSERT(!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(heap, obj, e_idx));
DUK_TVAL_SET_TVAL(tv_out, DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(heap, obj, e_idx));
return 1;
}
DUK_TVAL_SET_UNDEFINED(tv_out);
return 0;
}
DUK_INTERNAL duk_hstring *duk_hobject_get_internal_value_string(duk_heap *heap, duk_hobject *obj) {
duk_tval tv;
DUK_ASSERT(heap != NULL);
DUK_ASSERT(obj != NULL);
/* This is not strictly necessary, but avoids compiler warnings; e.g.
* gcc won't reliably detect that no uninitialized data is read below.
*/
DUK_MEMZERO((void *) &tv, sizeof(duk_tval));
if (duk_hobject_get_internal_value(heap, obj, &tv)) {
duk_hstring *h;
DUK_ASSERT(DUK_TVAL_IS_STRING(&tv));
h = DUK_TVAL_GET_STRING(&tv);
return h;
}
return NULL;
}
/*
* Arguments handling helpers (argument map mainly).
*
* An arguments object has exotic behavior for some numeric indices.
* Accesses may translate to identifier operations which may have
* arbitrary side effects (potentially invalidating any duk_tval
* pointers).
*/
/* Lookup 'key' from arguments internal 'map', perform a variable lookup
* if mapped, and leave the result on top of stack (and return non-zero).
* Used in E5 Section 10.6 algorithms [[Get]] and [[GetOwnProperty]].
*/
DUK_LOCAL
duk_bool_t duk__lookup_arguments_map(duk_hthread *thr,
duk_hobject *obj,
duk_hstring *key,
duk_propdesc *temp_desc,
duk_hobject **out_map,
duk_hobject **out_varenv) {
duk_context *ctx = (duk_context *) thr;
duk_hobject *map;
duk_hobject *varenv;
duk_bool_t rc;
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
DUK_DDD(DUK_DDDPRINT("arguments map lookup: thr=%p, obj=%p, key=%p, temp_desc=%p "
"(obj -> %!O, key -> %!O)",
(void *) thr, (void *) obj, (void *) key, (void *) temp_desc,
(duk_heaphdr *) obj, (duk_heaphdr *) key));
if (!duk_hobject_get_own_propdesc(thr, obj, DUK_HTHREAD_STRING_INT_MAP(thr), temp_desc, DUK_GETDESC_FLAG_PUSH_VALUE)) {
DUK_DDD(DUK_DDDPRINT("-> no 'map'"));
return 0;
}
map = duk_require_hobject(ctx, -1);
DUK_ASSERT(map != NULL);
duk_pop(ctx); /* map is reachable through obj */
if (!duk_hobject_get_own_propdesc(thr, map, key, temp_desc, DUK_GETDESC_FLAG_PUSH_VALUE)) {
DUK_DDD(DUK_DDDPRINT("-> 'map' exists, but key not in map"));
return 0;
}
/* [... varname] */
DUK_DDD(DUK_DDDPRINT("-> 'map' exists, and contains key, key is mapped to argument/variable binding %!T",
(duk_tval *) duk_get_tval(ctx, -1)));
DUK_ASSERT(duk_is_string(ctx, -1)); /* guaranteed when building arguments */
/* get varenv for varname (callee's declarative lexical environment) */
rc = duk_hobject_get_own_propdesc(thr, obj, DUK_HTHREAD_STRING_INT_VARENV(thr), temp_desc, DUK_GETDESC_FLAG_PUSH_VALUE);
DUK_UNREF(rc);
DUK_ASSERT(rc != 0); /* arguments MUST have an initialized lexical environment reference */
varenv = duk_require_hobject(ctx, -1);
DUK_ASSERT(varenv != NULL);
duk_pop(ctx); /* varenv remains reachable through 'obj' */
DUK_DDD(DUK_DDDPRINT("arguments varenv is: %!dO", (duk_heaphdr *) varenv));
/* success: leave varname in stack */
*out_map = map;
*out_varenv = varenv;
return 1; /* [... varname] */
}
/* Lookup 'key' from arguments internal 'map', and leave replacement value
* on stack top if mapped (and return non-zero).
* Used in E5 Section 10.6 algorithm for [[GetOwnProperty]] (used by [[Get]]).
*/
DUK_LOCAL duk_bool_t duk__check_arguments_map_for_get(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *temp_desc) {
duk_context *ctx = (duk_context *) thr;
duk_hobject *map;
duk_hobject *varenv;
duk_hstring *varname;
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
if (!duk__lookup_arguments_map(thr, obj, key, temp_desc, &map, &varenv)) {
DUK_DDD(DUK_DDDPRINT("arguments: key not mapped, no exotic get behavior"));
return 0;
}
/* [... varname] */
varname = duk_require_hstring(ctx, -1);
DUK_ASSERT(varname != NULL);
duk_pop(ctx); /* varname is still reachable */
DUK_DDD(DUK_DDDPRINT("arguments object automatic getvar for a bound variable; "
"key=%!O, varname=%!O",
(duk_heaphdr *) key,
(duk_heaphdr *) varname));
(void) duk_js_getvar_envrec(thr, varenv, varname, 1 /*throw*/);
/* [... value this_binding] */
duk_pop(ctx);
/* leave result on stack top */
return 1;
}
/* Lookup 'key' from arguments internal 'map', perform a variable write if mapped.
* Used in E5 Section 10.6 algorithm for [[DefineOwnProperty]] (used by [[Put]]).
* Assumes stack top contains 'put' value (which is NOT popped).
*/
DUK_LOCAL void duk__check_arguments_map_for_put(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *temp_desc, duk_bool_t throw_flag) {
duk_context *ctx = (duk_context *) thr;
duk_hobject *map;
duk_hobject *varenv;
duk_hstring *varname;
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
if (!duk__lookup_arguments_map(thr, obj, key, temp_desc, &map, &varenv)) {
DUK_DDD(DUK_DDDPRINT("arguments: key not mapped, no exotic put behavior"));
return;
}
/* [... put_value varname] */
varname = duk_require_hstring(ctx, -1);
DUK_ASSERT(varname != NULL);
duk_pop(ctx); /* varname is still reachable */
DUK_DDD(DUK_DDDPRINT("arguments object automatic putvar for a bound variable; "
"key=%!O, varname=%!O, value=%!T",
(duk_heaphdr *) key,
(duk_heaphdr *) varname,
(duk_tval *) duk_require_tval(ctx, -1)));
/* [... put_value] */
/*
* Note: although arguments object variable mappings are only established
* for non-strict functions (and a call to a non-strict function created
* the arguments object in question), an inner strict function may be doing
* the actual property write. Hence the throw_flag applied here comes from
* the property write call.
*/
duk_js_putvar_envrec(thr, varenv, varname, duk_require_tval(ctx, -1), throw_flag);
/* [... put_value] */
}
/* Lookup 'key' from arguments internal 'map', delete mapping if found.
* Used in E5 Section 10.6 algorithm for [[Delete]]. Note that the
* variable/argument itself (where the map points) is not deleted.
*/
DUK_LOCAL void duk__check_arguments_map_for_delete(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *temp_desc) {
duk_context *ctx = (duk_context *) thr;
duk_hobject *map;
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
if (!duk_hobject_get_own_propdesc(thr, obj, DUK_HTHREAD_STRING_INT_MAP(thr), temp_desc, DUK_GETDESC_FLAG_PUSH_VALUE)) {
DUK_DDD(DUK_DDDPRINT("arguments: key not mapped, no exotic delete behavior"));
return;
}
map = duk_require_hobject(ctx, -1);
DUK_ASSERT(map != NULL);
duk_pop(ctx); /* map is reachable through obj */
DUK_DDD(DUK_DDDPRINT("-> have 'map', delete key %!O from map (if exists)); ignore result",
(duk_heaphdr *) key));
/* Note: no recursion issue, we can trust 'map' to behave */
DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_BEHAVIOR(map));
DUK_DDD(DUK_DDDPRINT("map before deletion: %!O", (duk_heaphdr *) map));
(void) duk_hobject_delprop_raw(thr, map, key, 0); /* ignore result */
DUK_DDD(DUK_DDDPRINT("map after deletion: %!O", (duk_heaphdr *) map));
}
/*
* Ecmascript compliant [[GetOwnProperty]](P), for internal use only.
*
* If property is found:
* - Fills descriptor fields to 'out_desc'
* - If DUK_GETDESC_FLAG_PUSH_VALUE is set, pushes a value related to the
* property onto the stack ('undefined' for accessor properties).
* - Returns non-zero
*
* If property is not found:
* - 'out_desc' is left in untouched state (possibly garbage)
* - Nothing is pushed onto the stack (not even with DUK_GETDESC_FLAG_PUSH_VALUE
* set)
* - Returns zero
*
* Notes:
*
* - Getting a property descriptor may cause an allocation (and hence
* GC) to take place, hence reachability and refcount of all related
* values matter. Reallocation of value stack, properties, etc may
* invalidate many duk_tval pointers (concretely, those which reside
* in memory areas subject to reallocation). However, heap object
* pointers are never affected (heap objects have stable pointers).
*
* - The value of a plain property is always reachable and has a non-zero
* reference count.
*
* - The value of a virtual property is not necessarily reachable from
* elsewhere and may have a refcount of zero. Hence we push it onto
* the valstack for the caller, which ensures it remains reachable
* while it is needed.
*
* - There are no virtual accessor properties. Hence, all getters and
* setters are always related to concretely stored properties, which
* ensures that the get/set functions in the resulting descriptor are
* reachable and have non-zero refcounts. Should there be virtual
* accessor properties later, this would need to change.
*/
DUK_LOCAL duk_bool_t duk__get_own_propdesc_raw(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_uint32_t arr_idx, duk_propdesc *out_desc, duk_small_uint_t flags) {
duk_context *ctx = (duk_context *) thr;
duk_tval *tv;
DUK_DDD(DUK_DDDPRINT("duk_hobject_get_own_propdesc: thr=%p, obj=%p, key=%p, out_desc=%p, flags=%lx, "
"arr_idx=%ld (obj -> %!O, key -> %!O)",
(void *) thr, (void *) obj, (void *) key, (void *) out_desc,
(long) flags, (long) arr_idx,
(duk_heaphdr *) obj, (duk_heaphdr *) key));
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT(key != NULL);
DUK_ASSERT(out_desc != NULL);
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
/* XXX: optimize this filling behavior later */
out_desc->flags = 0;
out_desc->get = NULL;
out_desc->set = NULL;
out_desc->e_idx = -1;
out_desc->h_idx = -1;
out_desc->a_idx = -1;
/*
* Array part
*/
if (DUK_HOBJECT_HAS_ARRAY_PART(obj) && arr_idx != DUK__NO_ARRAY_INDEX) {
if (arr_idx < DUK_HOBJECT_GET_ASIZE(obj)) {
tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, arr_idx);
if (!DUK_TVAL_IS_UNUSED(tv)) {
DUK_DDD(DUK_DDDPRINT("-> found in array part"));
if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) {
duk_push_tval(ctx, tv);
}
/* implicit attributes */
out_desc->flags = DUK_PROPDESC_FLAG_WRITABLE |
DUK_PROPDESC_FLAG_CONFIGURABLE |
DUK_PROPDESC_FLAG_ENUMERABLE;
out_desc->a_idx = arr_idx;
goto prop_found;
}
}
/* assume array part is comprehensive (contains all array indexed elements
* or none of them); hence no need to check the entries part here.
*/
DUK_DDD(DUK_DDDPRINT("-> not found as a concrete property (has array part, "
"should be there if present)"));
goto prop_not_found_concrete;
}
/*
* Entries part
*/
duk_hobject_find_existing_entry(thr->heap, obj, key, &out_desc->e_idx, &out_desc->h_idx);
if (out_desc->e_idx >= 0) {
duk_int_t e_idx = out_desc->e_idx;
out_desc->flags = DUK_HOBJECT_E_GET_FLAGS(thr->heap, obj, e_idx);
if (out_desc->flags & DUK_PROPDESC_FLAG_ACCESSOR) {
DUK_DDD(DUK_DDDPRINT("-> found accessor property in entry part"));
out_desc->get = DUK_HOBJECT_E_GET_VALUE_GETTER(thr->heap, obj, e_idx);
out_desc->set = DUK_HOBJECT_E_GET_VALUE_SETTER(thr->heap, obj, e_idx);
if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) {
/* a dummy undefined value is pushed to make valstack
* behavior uniform for caller
*/
duk_push_undefined(ctx);
}
} else {
DUK_DDD(DUK_DDDPRINT("-> found plain property in entry part"));
tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, e_idx);
if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) {
duk_push_tval(ctx, tv);
}
}
goto prop_found;
}
/*
* Not found as a concrete property, check whether a String object
* virtual property matches.
*/
prop_not_found_concrete:
if (DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(obj)) {
DUK_DDD(DUK_DDDPRINT("string object exotic property get for key: %!O, arr_idx: %ld",
(duk_heaphdr *) key, (long) arr_idx));
if (arr_idx != DUK__NO_ARRAY_INDEX) {
duk_hstring *h_val;
DUK_DDD(DUK_DDDPRINT("array index exists"));
h_val = duk_hobject_get_internal_value_string(thr->heap, obj);
DUK_ASSERT(h_val);
if (arr_idx < DUK_HSTRING_GET_CHARLEN(h_val)) {
DUK_DDD(DUK_DDDPRINT("-> found, array index inside string"));
if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) {
duk_push_hstring(ctx, h_val);
duk_substring(ctx, -1, arr_idx, arr_idx + 1); /* [str] -> [substr] */
}
out_desc->flags = DUK_PROPDESC_FLAG_ENUMERABLE | /* E5 Section 15.5.5.2 */
DUK_PROPDESC_FLAG_VIRTUAL;
DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj));
return 1; /* cannot be e.g. arguments exotic, since exotic 'traits' are mutually exclusive */
} else {
/* index is above internal string length -> property is fully normal */
DUK_DDD(DUK_DDDPRINT("array index outside string -> normal property"));
}
} else if (key == DUK_HTHREAD_STRING_LENGTH(thr)) {
duk_hstring *h_val;
DUK_DDD(DUK_DDDPRINT("-> found, key is 'length', length exotic behavior"));
h_val = duk_hobject_get_internal_value_string(thr->heap, obj);
DUK_ASSERT(h_val != NULL);
if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) {
duk_push_uint(ctx, (duk_uint_t) DUK_HSTRING_GET_CHARLEN(h_val));
}
out_desc->flags = DUK_PROPDESC_FLAG_VIRTUAL; /* E5 Section 15.5.5.1 */
DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj));
return 1; /* cannot be arguments exotic */
}
} else if (DUK_HOBJECT_IS_BUFFEROBJECT(obj)) {
duk_hbufferobject *h_bufobj;
duk_uint_t byte_off;
duk_small_uint_t elem_size;
h_bufobj = (duk_hbufferobject *) obj;
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
DUK_DDD(DUK_DDDPRINT("bufferobject property get for key: %!O, arr_idx: %ld",
(duk_heaphdr *) key, (long) arr_idx));
if (arr_idx != DUK__NO_ARRAY_INDEX) {
DUK_DDD(DUK_DDDPRINT("array index exists"));
/* Careful with wrapping: arr_idx upshift may easily wrap, whereas
* length downshift won't.
*/
if (arr_idx < (h_bufobj->length >> h_bufobj->shift)) {
byte_off = arr_idx << h_bufobj->shift; /* no wrap assuming h_bufobj->length is valid */
elem_size = 1 << h_bufobj->shift;
if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) {
duk_uint8_t *data;
if (h_bufobj->buf != NULL && DUK_HBUFFEROBJECT_VALID_BYTEOFFSET_EXCL(h_bufobj, byte_off + elem_size)) {
data = (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_bufobj->buf) + h_bufobj->offset + byte_off;
duk_hbufferobject_push_validated_read(ctx, h_bufobj, data, elem_size);
} else {
DUK_D(DUK_DPRINT("bufferobject access out of underlying buffer, ignoring (read zero)"));
duk_push_uint(ctx, 0);
}
}
out_desc->flags = DUK_PROPDESC_FLAG_WRITABLE |
DUK_PROPDESC_FLAG_ENUMERABLE |
DUK_PROPDESC_FLAG_VIRTUAL;
DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj));
return 1; /* cannot be e.g. arguments exotic, since exotic 'traits' are mutually exclusive */
} else {
/* index is above internal buffer length -> property is fully normal */
DUK_DDD(DUK_DDDPRINT("array index outside buffer -> normal property"));
}
} else if (key == DUK_HTHREAD_STRING_LENGTH(thr)) {
DUK_DDD(DUK_DDDPRINT("-> found, key is 'length', length exotic behavior"));
if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) {
/* Length in elements: take into account shift, but
* intentionally don't check the underlying buffer here.
*/
duk_push_uint(ctx, h_bufobj->length >> h_bufobj->shift);
}
out_desc->flags = DUK_PROPDESC_FLAG_VIRTUAL;
DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj));
return 1; /* cannot be arguments exotic */
} else if (key == DUK_HTHREAD_STRING_BYTE_LENGTH(thr)) {
/* If neutered must return 0; length is zeroed during
* neutering.
*/
if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) {
duk_push_uint(ctx, h_bufobj->length);
}
out_desc->flags = DUK_PROPDESC_FLAG_VIRTUAL;
return 1; /* cannot be arguments exotic */
} else if (key == DUK_HTHREAD_STRING_BYTE_OFFSET(thr)) {
/* If neutered must return 0; offset is zeroed during
* neutering.
*/
if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) {
duk_push_uint(ctx, h_bufobj->offset);
}
out_desc->flags = DUK_PROPDESC_FLAG_VIRTUAL;
return 1; /* cannot be arguments exotic */
} else if (key == DUK_HTHREAD_STRING_BYTES_PER_ELEMENT(thr)) {
if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) {
duk_push_uint(ctx, 1 << h_bufobj->shift);
}
out_desc->flags = DUK_PROPDESC_FLAG_VIRTUAL;
return 1; /* cannot be arguments exotic */
}
} else if (DUK_HOBJECT_HAS_EXOTIC_DUKFUNC(obj)) {
DUK_DDD(DUK_DDDPRINT("duktape/c object exotic property get for key: %!O, arr_idx: %ld",
(duk_heaphdr *) key, (long) arr_idx));
if (key == DUK_HTHREAD_STRING_LENGTH(thr)) {
DUK_DDD(DUK_DDDPRINT("-> found, key is 'length', length exotic behavior"));
if (flags & DUK_GETDESC_FLAG_PUSH_VALUE) {
duk_int16_t func_nargs = ((duk_hnativefunction *) obj)->nargs;
duk_push_int(ctx, func_nargs == DUK_HNATIVEFUNCTION_NARGS_VARARGS ? 0 : func_nargs);
}
out_desc->flags = DUK_PROPDESC_FLAG_VIRTUAL; /* not enumerable */
DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj));
return 1; /* cannot be arguments exotic */
}
}
/* Array properties have exotic behavior but they are concrete,
* so no special handling here.
*
* Arguments exotic behavior (E5 Section 10.6, [[GetOwnProperty]]
* is only relevant as a post-check implemented below; hence no
* check here.
*/
/*
* Not found as concrete or virtual
*/
DUK_DDD(DUK_DDDPRINT("-> not found (virtual, entry part, or array part)"));
return 0;
/*
* Found
*
* Arguments object has exotic post-processing, see E5 Section 10.6,
* description of [[GetOwnProperty]] variant for arguments.
*/
prop_found:
DUK_DDD(DUK_DDDPRINT("-> property found, checking for arguments exotic post-behavior"));
/* Notes:
* - only numbered indices are relevant, so arr_idx fast reject is good
* (this is valid unless there are more than 4**32-1 arguments).
* - since variable lookup has no side effects, this can be skipped if
* DUK_GETDESC_FLAG_PUSH_VALUE is not set.
*/
if (DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj) &&
arr_idx != DUK__NO_ARRAY_INDEX &&
(flags & DUK_GETDESC_FLAG_PUSH_VALUE)) {
duk_propdesc temp_desc;
/* Magically bound variable cannot be an accessor. However,
* there may be an accessor property (or a plain property) in
* place with magic behavior removed. This happens e.g. when
* a magic property is redefined with defineProperty().
* Cannot assert for "not accessor" here.
*/
/* replaces top of stack with new value if necessary */
DUK_ASSERT((flags & DUK_GETDESC_FLAG_PUSH_VALUE) != 0);
if (duk__check_arguments_map_for_get(thr, obj, key, &temp_desc)) {
DUK_DDD(DUK_DDDPRINT("-> arguments exotic behavior overrides result: %!T -> %!T",
(duk_tval *) duk_get_tval(ctx, -2),
(duk_tval *) duk_get_tval(ctx, -1)));
/* [... old_result result] -> [... result] */
duk_remove(ctx, -2);
}
}
return 1;
}
DUK_INTERNAL duk_bool_t duk_hobject_get_own_propdesc(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *out_desc, duk_small_uint_t flags) {
DUK_ASSERT(thr != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT(key != NULL);
DUK_ASSERT(out_desc != NULL);
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
return duk__get_own_propdesc_raw(thr, obj, key, DUK_HSTRING_GET_ARRIDX_SLOW(key), out_desc, flags);
}
/*
* Ecmascript compliant [[GetProperty]](P), for internal use only.
*
* If property is found:
* - Fills descriptor fields to 'out_desc'
* - If DUK_GETDESC_FLAG_PUSH_VALUE is set, pushes a value related to the
* property onto the stack ('undefined' for accessor properties).
* - Returns non-zero
*
* If property is not found:
* - 'out_desc' is left in untouched state (possibly garbage)
* - Nothing is pushed onto the stack (not even with DUK_GETDESC_FLAG_PUSH_VALUE
* set)
* - Returns zero
*
* May cause arbitrary side effects and invalidate (most) duk_tval
* pointers.
*/
DUK_LOCAL duk_bool_t duk__get_propdesc(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_propdesc *out_desc, duk_small_uint_t flags) {
duk_hobject *curr;
duk_uint32_t arr_idx;
duk_uint_t sanity;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT(key != NULL);
DUK_ASSERT(out_desc != NULL);
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
arr_idx = DUK_HSTRING_GET_ARRIDX_FAST(key);
DUK_DDD(DUK_DDDPRINT("duk__get_propdesc: thr=%p, obj=%p, key=%p, out_desc=%p, flags=%lx, "
"arr_idx=%ld (obj -> %!O, key -> %!O)",
(void *) thr, (void *) obj, (void *) key, (void *) out_desc,
(long) flags, (long) arr_idx,
(duk_heaphdr *) obj, (duk_heaphdr *) key));
curr = obj;
DUK_ASSERT(curr != NULL);
sanity = DUK_HOBJECT_PROTOTYPE_CHAIN_SANITY;
do {
if (duk__get_own_propdesc_raw(thr, curr, key, arr_idx, out_desc, flags)) {
/* stack contains value (if requested), 'out_desc' is set */
return 1;
}
/* not found in 'curr', next in prototype chain; impose max depth */
if (sanity-- == 0) {
if (flags & DUK_GETDESC_FLAG_IGNORE_PROTOLOOP) {
/* treat like property not found */
break;
} else {
DUK_ERROR_RANGE(thr, DUK_STR_PROTOTYPE_CHAIN_LIMIT);
}
}
curr = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, curr);
} while (curr);
/* out_desc is left untouched (possibly garbage), caller must use return
* value to determine whether out_desc can be looked up
*/
return 0;
}
/*
* Shallow fast path checks for accessing array elements with numeric
* indices. The goal is to try to avoid coercing an array index to an
* (interned) string for the most common lookups, in particular, for
* standard Array objects.
*
* Interning is avoided but only for a very narrow set of cases:
* - Object has array part, index is within array allocation, and
* value is not unused (= key exists)
* - Object has no interfering exotic behavior (e.g. arguments or
* string object exotic behaviors interfere, array exotic
* behavior does not).
*
* Current shortcoming: if key does not exist (even if it is within
* the array allocation range) a slow path lookup with interning is
* always required. This can probably be fixed so that there is a
* quick fast path for non-existent elements as well, at least for
* standard Array objects.
*/
DUK_LOCAL duk_tval *duk__getprop_shallow_fastpath_array_tval(duk_hthread *thr, duk_hobject *obj, duk_tval *tv_key) {
duk_tval *tv;
duk_uint32_t idx;
DUK_UNREF(thr);
if (!(DUK_HOBJECT_HAS_ARRAY_PART(obj) &&
!DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj) &&
!DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(obj) &&
!DUK_HOBJECT_IS_BUFFEROBJECT(obj) &&
!DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(obj))) {
/* Must have array part and no conflicting exotic behaviors.
* Doesn't need to have array special behavior, e.g. Arguments
* object has array part.
*/
return NULL;
}
/* Arrays never have other exotic behaviors. */
DUK_DDD(DUK_DDDPRINT("fast path attempt (no exotic string/arguments/buffer "
"behavior, object has array part)"));
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv_key)) {
idx = duk__tval_fastint_to_arr_idx(tv_key);
} else
#endif
if (DUK_TVAL_IS_DOUBLE(tv_key)) {
idx = duk__tval_number_to_arr_idx(tv_key);
} else {
DUK_DDD(DUK_DDDPRINT("key is not a number"));
return NULL;
}
/* If index is not valid, idx will be DUK__NO_ARRAY_INDEX which
* is 0xffffffffUL. We don't need to check for that explicitly
* because 0xffffffffUL will never be inside object 'a_size'.
*/
if (idx >= DUK_HOBJECT_GET_ASIZE(obj)) {
DUK_DDD(DUK_DDDPRINT("key is not an array index or outside array part"));
return NULL;
}
DUK_ASSERT(idx != 0xffffffffUL);
DUK_ASSERT(idx != DUK__NO_ARRAY_INDEX);
/* XXX: for array instances we could take a shortcut here and assume
* Array.prototype doesn't contain an array index property.
*/
DUK_DDD(DUK_DDDPRINT("key is a valid array index and inside array part"));
tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, idx);
if (!DUK_TVAL_IS_UNUSED(tv)) {
DUK_DDD(DUK_DDDPRINT("-> fast path successful"));
return tv;
}
DUK_DDD(DUK_DDDPRINT("fast path attempt failed, fall back to slow path"));
return NULL;
}
DUK_LOCAL duk_bool_t duk__putprop_shallow_fastpath_array_tval(duk_hthread *thr, duk_hobject *obj, duk_tval *tv_key, duk_tval *tv_val, duk_propdesc *temp_desc) {
duk_tval *tv;
duk_uint32_t idx;
duk_uint32_t old_len, new_len;
if (!(DUK_HOBJECT_HAS_EXOTIC_ARRAY(obj) &&
DUK_HOBJECT_HAS_ARRAY_PART(obj) &&
DUK_HOBJECT_HAS_EXTENSIBLE(obj))) {
return 0;
}
DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)); /* caller ensures */
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv_key)) {
idx = duk__tval_fastint_to_arr_idx(tv_key);
} else
#endif
if (DUK_TVAL_IS_DOUBLE(tv_key)) {
idx = duk__tval_number_to_arr_idx(tv_key);
} else {
DUK_DDD(DUK_DDDPRINT("key is not a number"));
return 0;
}
/* If index is not valid, idx will be DUK__NO_ARRAY_INDEX which
* is 0xffffffffUL. We don't need to check for that explicitly
* because 0xffffffffUL will never be inside object 'a_size'.
*/
if (idx >= DUK_HOBJECT_GET_ASIZE(obj)) { /* for resizing of array part, use slow path */
return 0;
}
DUK_ASSERT(idx != 0xffffffffUL);
DUK_ASSERT(idx != DUK__NO_ARRAY_INDEX);
old_len = duk__get_old_array_length(thr, obj, temp_desc);
if (idx >= old_len) {
DUK_DDD(DUK_DDDPRINT("write new array entry requires length update "
"(arr_idx=%ld, old_len=%ld)",
(long) idx, (long) old_len));
if (!(temp_desc->flags & DUK_PROPDESC_FLAG_WRITABLE)) {
DUK_ERROR_TYPE(thr, DUK_STR_NOT_WRITABLE);
return 0; /* not reachable */
}
new_len = idx + 1;
/* No resize has occurred so temp_desc->e_idx is still OK */
tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, temp_desc->e_idx);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
DUK_TVAL_SET_FASTINT_U32(tv, new_len); /* no need for decref/incref because value is a number */
} else {
;
}
tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, idx);
DUK_TVAL_SET_TVAL_UPDREF(thr, tv, tv_val); /* side effects */
DUK_DDD(DUK_DDDPRINT("array fast path success for index %ld", (long) idx));
return 1;
}
/*
* Fast path for bufferobject getprop/putprop
*/
DUK_LOCAL duk_bool_t duk__getprop_fastpath_bufobj_tval(duk_hthread *thr, duk_hobject *obj, duk_tval *tv_key) {
duk_context *ctx;
duk_uint32_t idx;
duk_hbufferobject *h_bufobj;
duk_uint_t byte_off;
duk_small_uint_t elem_size;
duk_uint8_t *data;
ctx = (duk_context *) thr;
if (!DUK_HOBJECT_IS_BUFFEROBJECT(obj)) {
return 0;
}
h_bufobj = (duk_hbufferobject *) obj;
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv_key)) {
idx = duk__tval_fastint_to_arr_idx(tv_key);
} else
#endif
if (DUK_TVAL_IS_DOUBLE(tv_key)) {
idx = duk__tval_number_to_arr_idx(tv_key);
} else {
return 0;
}
/* If index is not valid, idx will be DUK__NO_ARRAY_INDEX which
* is 0xffffffffUL. We don't need to check for that explicitly
* because 0xffffffffUL will never be inside bufferobject length.
*/
/* Careful with wrapping (left shifting idx would be unsafe). */
if (idx >= (h_bufobj->length >> h_bufobj->shift)) {
return 0;
}
DUK_ASSERT(idx != DUK__NO_ARRAY_INDEX);
byte_off = idx << h_bufobj->shift; /* no wrap assuming h_bufobj->length is valid */
elem_size = 1 << h_bufobj->shift;
if (h_bufobj->buf != NULL && DUK_HBUFFEROBJECT_VALID_BYTEOFFSET_EXCL(h_bufobj, byte_off + elem_size)) {
data = (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_bufobj->buf) + h_bufobj->offset + byte_off;
duk_hbufferobject_push_validated_read(ctx, h_bufobj, data, elem_size);
} else {
DUK_D(DUK_DPRINT("bufferobject access out of underlying buffer, ignoring (read zero)"));
duk_push_uint(ctx, 0);
}
return 1;
}
DUK_LOCAL duk_bool_t duk__putprop_fastpath_bufobj_tval(duk_hthread *thr, duk_hobject *obj, duk_tval *tv_key, duk_tval *tv_val) {
duk_context *ctx;
duk_uint32_t idx;
duk_hbufferobject *h_bufobj;
duk_uint_t byte_off;
duk_small_uint_t elem_size;
duk_uint8_t *data;
ctx = (duk_context *) thr;
if (!(DUK_HOBJECT_IS_BUFFEROBJECT(obj) &&
DUK_TVAL_IS_NUMBER(tv_val))) {
return 0;
}
DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)); /* caller ensures; rom objects are never bufferobjects now */
h_bufobj = (duk_hbufferobject *) obj;
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv_key)) {
idx = duk__tval_fastint_to_arr_idx(tv_key);
} else
#endif
if (DUK_TVAL_IS_DOUBLE(tv_key)) {
idx = duk__tval_number_to_arr_idx(tv_key);
} else {
return 0;
}
/* If index is not valid, idx will be DUK__NO_ARRAY_INDEX which
* is 0xffffffffUL. We don't need to check for that explicitly
* because 0xffffffffUL will never be inside bufferobject length.
*/
/* Careful with wrapping (left shifting idx would be unsafe). */
if (idx >= (h_bufobj->length >> h_bufobj->shift)) {
return 0;
}
DUK_ASSERT(idx != DUK__NO_ARRAY_INDEX);
byte_off = idx << h_bufobj->shift; /* no wrap assuming h_bufobj->length is valid */
elem_size = 1 << h_bufobj->shift;
/* Value is required to be a number in the fast path so there
* are no side effects in write coercion.
*/
duk_push_tval(ctx, tv_val);
DUK_ASSERT(duk_is_number(ctx, -1));
if (h_bufobj->buf != NULL && DUK_HBUFFEROBJECT_VALID_BYTEOFFSET_EXCL(h_bufobj, byte_off + elem_size)) {
data = (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_bufobj->buf) + h_bufobj->offset + byte_off;
duk_hbufferobject_validated_write(ctx, h_bufobj, data, elem_size);
} else {
DUK_D(DUK_DPRINT("bufferobject access out of underlying buffer, ignoring (write skipped)"));
}
duk_pop(ctx);
return 1;
}
/*
* GETPROP: Ecmascript property read.
*/
DUK_INTERNAL duk_bool_t duk_hobject_getprop(duk_hthread *thr, duk_tval *tv_obj, duk_tval *tv_key) {
duk_context *ctx = (duk_context *) thr;
duk_tval tv_obj_copy;
duk_tval tv_key_copy;
duk_hobject *curr = NULL;
duk_hstring *key = NULL;
duk_uint32_t arr_idx = DUK__NO_ARRAY_INDEX;
duk_propdesc desc;
duk_uint_t sanity;
DUK_DDD(DUK_DDDPRINT("getprop: thr=%p, obj=%p, key=%p (obj -> %!T, key -> %!T)",
(void *) thr, (void *) tv_obj, (void *) tv_key,
(duk_tval *) tv_obj, (duk_tval *) tv_key));
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(tv_obj != NULL);
DUK_ASSERT(tv_key != NULL);
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
/*
* Make a copy of tv_obj, tv_key, and tv_val to avoid any issues of
* them being invalidated by a valstack resize.
*
* XXX: this is now an overkill for many fast paths. Rework this
* to be faster (although switching to a valstack discipline might
* be a better solution overall).
*/
DUK_TVAL_SET_TVAL(&tv_obj_copy, tv_obj);
DUK_TVAL_SET_TVAL(&tv_key_copy, tv_key);
tv_obj = &tv_obj_copy;
tv_key = &tv_key_copy;
/*
* Coercion and fast path processing
*/
switch (DUK_TVAL_GET_TAG(tv_obj)) {
case DUK_TAG_UNDEFINED:
case DUK_TAG_NULL: {
/* Note: unconditional throw */
DUK_DDD(DUK_DDDPRINT("base object is undefined or null -> reject"));
#if defined(DUK_USE_PARANOID_ERRORS)
DUK_ERROR_TYPE(thr, DUK_STR_INVALID_BASE);
#else
DUK_ERROR_FMT2(thr, DUK_ERR_TYPE_ERROR, "cannot read property %s of %s",
duk_push_string_tval_readable(ctx, tv_key), duk_push_string_tval_readable(ctx, tv_obj));
#endif
return 0;
}
case DUK_TAG_BOOLEAN: {
DUK_DDD(DUK_DDDPRINT("base object is a boolean, start lookup from boolean prototype"));
curr = thr->builtins[DUK_BIDX_BOOLEAN_PROTOTYPE];
break;
}
case DUK_TAG_STRING: {
duk_hstring *h = DUK_TVAL_GET_STRING(tv_obj);
duk_int_t pop_count;
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv_key)) {
arr_idx = duk__tval_fastint_to_arr_idx(tv_key);
DUK_DDD(DUK_DDDPRINT("base object string, key is a fast-path fastint; arr_idx %ld", (long) arr_idx));
pop_count = 0;
} else
#endif
if (DUK_TVAL_IS_NUMBER(tv_key)) {
arr_idx = duk__tval_number_to_arr_idx(tv_key);
DUK_DDD(DUK_DDDPRINT("base object string, key is a fast-path number; arr_idx %ld", (long) arr_idx));
pop_count = 0;
} else {
arr_idx = duk__push_tval_to_hstring_arr_idx(ctx, tv_key, &key);
DUK_ASSERT(key != NULL);
DUK_DDD(DUK_DDDPRINT("base object string, key is a non-fast-path number; after "
"coercion key is %!T, arr_idx %ld",
(duk_tval *) duk_get_tval(ctx, -1), (long) arr_idx));
pop_count = 1;
}
if (arr_idx != DUK__NO_ARRAY_INDEX &&
arr_idx < DUK_HSTRING_GET_CHARLEN(h)) {
duk_pop_n(ctx, pop_count);
duk_push_hstring(ctx, h);
duk_substring(ctx, -1, arr_idx, arr_idx + 1); /* [str] -> [substr] */
DUK_DDD(DUK_DDDPRINT("-> %!T (base is string, key is an index inside string length "
"after coercion -> return char)",
(duk_tval *) duk_get_tval(ctx, -1)));
return 1;
}
if (pop_count == 0) {
/* This is a pretty awkward control flow, but we need to recheck the
* key coercion here.
*/
arr_idx = duk__push_tval_to_hstring_arr_idx(ctx, tv_key, &key);
DUK_ASSERT(key != NULL);
DUK_DDD(DUK_DDDPRINT("base object string, key is a non-fast-path number; after "
"coercion key is %!T, arr_idx %ld",
(duk_tval *) duk_get_tval(ctx, -1), (long) arr_idx));
}
if (key == DUK_HTHREAD_STRING_LENGTH(thr)) {
duk_pop(ctx); /* [key] -> [] */
duk_push_uint(ctx, (duk_uint_t) DUK_HSTRING_GET_CHARLEN(h)); /* [] -> [res] */
DUK_DDD(DUK_DDDPRINT("-> %!T (base is string, key is 'length' after coercion -> "
"return string length)",
(duk_tval *) duk_get_tval(ctx, -1)));
return 1;
}
DUK_DDD(DUK_DDDPRINT("base object is a string, start lookup from string prototype"));
curr = thr->builtins[DUK_BIDX_STRING_PROTOTYPE];
goto lookup; /* avoid double coercion */
}
case DUK_TAG_OBJECT: {
duk_tval *tmp;
curr = DUK_TVAL_GET_OBJECT(tv_obj);
DUK_ASSERT(curr != NULL);
tmp = duk__getprop_shallow_fastpath_array_tval(thr, curr, tv_key);
if (tmp) {
duk_push_tval(ctx, tmp);
DUK_DDD(DUK_DDDPRINT("-> %!T (base is object, key is a number, array part "
"fast path)",
(duk_tval *) duk_get_tval(ctx, -1)));
return 1;
}
if (duk__getprop_fastpath_bufobj_tval(thr, curr, tv_key) != 0) {
/* Read value pushed on stack. */
DUK_DDD(DUK_DDDPRINT("-> %!T (base is bufobj, key is a number, bufferobject "
"fast path)",
(duk_tval *) duk_get_tval(ctx, -1)));
return 1;
}
#if defined(DUK_USE_ES6_PROXY)
if (DUK_UNLIKELY(DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(curr))) {
duk_hobject *h_target;
if (duk__proxy_check_prop(thr, curr, DUK_STRIDX_GET, tv_key, &h_target)) {
/* -> [ ... trap handler ] */
DUK_DDD(DUK_DDDPRINT("-> proxy object 'get' for key %!T", (duk_tval *) tv_key));
duk_push_hobject(ctx, h_target); /* target */
duk_push_tval(ctx, tv_key); /* P */
duk_push_tval(ctx, tv_obj); /* Receiver: Proxy object */
duk_call_method(ctx, 3 /*nargs*/);
/* Target object must be checked for a conflicting
* non-configurable property.
*/
arr_idx = duk__push_tval_to_hstring_arr_idx(ctx, tv_key, &key);
DUK_ASSERT(key != NULL);
if (duk__get_own_propdesc_raw(thr, h_target, key, arr_idx, &desc, DUK_GETDESC_FLAG_PUSH_VALUE)) {
duk_tval *tv_hook = duk_require_tval(ctx, -3); /* value from hook */
duk_tval *tv_targ = duk_require_tval(ctx, -1); /* value from target */
duk_bool_t datadesc_reject;
duk_bool_t accdesc_reject;
DUK_DDD(DUK_DDDPRINT("proxy 'get': target has matching property %!O, check for "
"conflicting property; tv_hook=%!T, tv_targ=%!T, desc.flags=0x%08lx, "
"desc.get=%p, desc.set=%p",
(duk_heaphdr *) key, (duk_tval *) tv_hook, (duk_tval *) tv_targ,
(unsigned long) desc.flags,
(void *) desc.get, (void *) desc.set));
datadesc_reject = !(desc.flags & DUK_PROPDESC_FLAG_ACCESSOR) &&
!(desc.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) &&
!(desc.flags & DUK_PROPDESC_FLAG_WRITABLE) &&
!duk_js_samevalue(tv_hook, tv_targ);
accdesc_reject = (desc.flags & DUK_PROPDESC_FLAG_ACCESSOR) &&
!(desc.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) &&
(desc.get == NULL) &&
!DUK_TVAL_IS_UNDEFINED(tv_hook);
if (datadesc_reject || accdesc_reject) {
DUK_ERROR_TYPE(thr, DUK_STR_PROXY_REJECTED);
}
duk_pop_2(ctx);
} else {
duk_pop(ctx);
}
return 1; /* return value */
}
curr = h_target; /* resume lookup from target */
DUK_TVAL_SET_OBJECT(tv_obj, curr);
}
#endif /* DUK_USE_ES6_PROXY */
if (DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(curr)) {
arr_idx = duk__push_tval_to_hstring_arr_idx(ctx, tv_key, &key);
DUK_ASSERT(key != NULL);
if (duk__check_arguments_map_for_get(thr, curr, key, &desc)) {
DUK_DDD(DUK_DDDPRINT("-> %!T (base is object with arguments exotic behavior, "
"key matches magically bound property -> skip standard "
"Get with replacement value)",
(duk_tval *) duk_get_tval(ctx, -1)));
/* no need for 'caller' post-check, because 'key' must be an array index */
duk_remove(ctx, -2); /* [key result] -> [result] */
return 1;
}
goto lookup; /* avoid double coercion */
}
break;
}
/* Buffer has virtual properties similar to string, but indexed values
* are numbers, not 1-byte buffers/strings which would perform badly.
*/
case DUK_TAG_BUFFER: {
duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv_obj);
duk_int_t pop_count;
/*
* Because buffer values are often looped over, a number fast path
* is important.
*/
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv_key)) {
arr_idx = duk__tval_fastint_to_arr_idx(tv_key);
DUK_DDD(DUK_DDDPRINT("base object buffer, key is a fast-path fastint; arr_idx %ld", (long) arr_idx));
pop_count = 0;
}
else
#endif
if (DUK_TVAL_IS_NUMBER(tv_key)) {
arr_idx = duk__tval_number_to_arr_idx(tv_key);
DUK_DDD(DUK_DDDPRINT("base object buffer, key is a fast-path number; arr_idx %ld", (long) arr_idx));
pop_count = 0;
} else {
arr_idx = duk__push_tval_to_hstring_arr_idx(ctx, tv_key, &key);
DUK_ASSERT(key != NULL);
DUK_DDD(DUK_DDDPRINT("base object buffer, key is a non-fast-path number; after "
"coercion key is %!T, arr_idx %ld",
(duk_tval *) duk_get_tval(ctx, -1), (long) arr_idx));
pop_count = 1;
}
if (arr_idx != DUK__NO_ARRAY_INDEX &&
arr_idx < DUK_HBUFFER_GET_SIZE(h)) {
duk_pop_n(ctx, pop_count);
duk_push_uint(ctx, ((duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h))[arr_idx]);
DUK_DDD(DUK_DDDPRINT("-> %!T (base is buffer, key is an index inside buffer length "
"after coercion -> return byte as number)",
(duk_tval *) duk_get_tval(ctx, -1)));
return 1;
}
if (pop_count == 0) {
/* This is a pretty awkward control flow, but we need to recheck the
* key coercion here.
*/
arr_idx = duk__push_tval_to_hstring_arr_idx(ctx, tv_key, &key);
DUK_ASSERT(key != NULL);
DUK_DDD(DUK_DDDPRINT("base object buffer, key is a non-fast-path number; after "
"coercion key is %!T, arr_idx %ld",
(duk_tval *) duk_get_tval(ctx, -1), (long) arr_idx));
}
if (key == DUK_HTHREAD_STRING_LENGTH(thr) ||
key == DUK_HTHREAD_STRING_BYTE_LENGTH(thr)) {
duk_pop(ctx); /* [key] -> [] */
duk_push_uint(ctx, (duk_uint_t) DUK_HBUFFER_GET_SIZE(h)); /* [] -> [res] */
DUK_DDD(DUK_DDDPRINT("-> %!T (base is buffer, key is 'length' or 'byteLength' "
"after coercion -> return buffer length)",
(duk_tval *) duk_get_tval(ctx, -1)));
return 1;
} else if (key == DUK_HTHREAD_STRING_BYTE_OFFSET(thr)) {
duk_pop(ctx); /* [key] -> [] */
duk_push_uint(ctx, 0); /* [] -> [res] */
DUK_DDD(DUK_DDDPRINT("-> %!T (base is buffer, key is 'byteOffset' after coercion -> "
"return 0 for consistency with Buffer objects)",
(duk_tval *) duk_get_tval(ctx, -1)));
return 1;
} else if (key == DUK_HTHREAD_STRING_BYTES_PER_ELEMENT(thr)) {
duk_pop(ctx); /* [key] -> [] */
duk_push_uint(ctx, 1); /* [] -> [res] */
DUK_DDD(DUK_DDDPRINT("-> %!T (base is buffer, key is 'BYTES_PER_ELEMENT' after coercion -> "
"return 1 for consistency with Buffer objects)",
(duk_tval *) duk_get_tval(ctx, -1)));
return 1;
}
DUK_DDD(DUK_DDDPRINT("base object is a buffer, start lookup from buffer prototype"));
curr = thr->builtins[DUK_BIDX_BUFFER_PROTOTYPE];
goto lookup; /* avoid double coercion */
}
case DUK_TAG_POINTER: {
DUK_DDD(DUK_DDDPRINT("base object is a pointer, start lookup from pointer prototype"));
curr = thr->builtins[DUK_BIDX_POINTER_PROTOTYPE];
break;
}
case DUK_TAG_LIGHTFUNC: {
duk_int_t lf_flags = DUK_TVAL_GET_LIGHTFUNC_FLAGS(tv_obj);
/* Must coerce key: if key is an object, it may coerce to e.g. 'length'. */
arr_idx = duk__push_tval_to_hstring_arr_idx(ctx, tv_key, &key);
if (key == DUK_HTHREAD_STRING_LENGTH(thr)) {
duk_int_t lf_len = DUK_LFUNC_FLAGS_GET_LENGTH(lf_flags);
duk_pop(ctx);
duk_push_int(ctx, lf_len);
return 1;
} else if (key == DUK_HTHREAD_STRING_NAME(thr)) {
duk_pop(ctx);
duk_push_lightfunc_name(ctx, tv_obj);
return 1;
}
DUK_DDD(DUK_DDDPRINT("base object is a lightfunc, start lookup from function prototype"));
curr = thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE];
goto lookup; /* avoid double coercion */
}
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT:
#endif
default: {
/* number */
DUK_DDD(DUK_DDDPRINT("base object is a number, start lookup from number prototype"));
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv_obj));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_obj));
curr = thr->builtins[DUK_BIDX_NUMBER_PROTOTYPE];
break;
}
}
/* key coercion (unless already coerced above) */
DUK_ASSERT(key == NULL);
arr_idx = duk__push_tval_to_hstring_arr_idx(ctx, tv_key, &key);
DUK_ASSERT(key != NULL);
/*
* Property lookup
*/
lookup:
/* [key] (coerced) */
DUK_ASSERT(curr != NULL);
DUK_ASSERT(key != NULL);
sanity = DUK_HOBJECT_PROTOTYPE_CHAIN_SANITY;
do {
if (!duk__get_own_propdesc_raw(thr, curr, key, arr_idx, &desc, DUK_GETDESC_FLAG_PUSH_VALUE)) {
goto next_in_chain;
}
if (desc.get != NULL) {
/* accessor with defined getter */
DUK_ASSERT((desc.flags & DUK_PROPDESC_FLAG_ACCESSOR) != 0);
duk_pop(ctx); /* [key undefined] -> [key] */
duk_push_hobject(ctx, desc.get);
duk_push_tval(ctx, tv_obj); /* note: original, uncoerced base */
#ifdef DUK_USE_NONSTD_GETTER_KEY_ARGUMENT
duk_dup(ctx, -3);
duk_call_method(ctx, 1); /* [key getter this key] -> [key retval] */
#else
duk_call_method(ctx, 0); /* [key getter this] -> [key retval] */
#endif
} else {
/* [key value] or [key undefined] */
/* data property or accessor without getter */
DUK_ASSERT(((desc.flags & DUK_PROPDESC_FLAG_ACCESSOR) == 0) ||
(desc.get == NULL));
/* if accessor without getter, return value is undefined */
DUK_ASSERT(((desc.flags & DUK_PROPDESC_FLAG_ACCESSOR) == 0) ||
duk_is_undefined(ctx, -1));
/* Note: for an accessor without getter, falling through to
* check for "caller" exotic behavior is unnecessary as
* "undefined" will never activate the behavior. But it does
* no harm, so we'll do it anyway.
*/
}
goto found; /* [key result] */
next_in_chain:
/* XXX: option to pretend property doesn't exist if sanity limit is
* hit might be useful.
*/
if (sanity-- == 0) {
DUK_ERROR_RANGE(thr, DUK_STR_PROTOTYPE_CHAIN_LIMIT);
}
curr = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, curr);
} while (curr);
/*
* Not found
*/
duk_to_undefined(ctx, -1); /* [key] -> [undefined] (default value) */
DUK_DDD(DUK_DDDPRINT("-> %!T (not found)", (duk_tval *) duk_get_tval(ctx, -1)));
return 0;
/*
* Found; post-processing (Function and arguments objects)
*/
found:
/* [key result] */
#if !defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY)
/* Special behavior for 'caller' property of (non-bound) function objects
* and non-strict Arguments objects: if 'caller' -value- (!) is a strict
* mode function, throw a TypeError (E5 Sections 15.3.5.4, 10.6).
* Quite interestingly, a non-strict function with no formal arguments
* will get an arguments object -without- special 'caller' behavior!
*
* The E5.1 spec is a bit ambiguous if this special behavior applies when
* a bound function is the base value (not the 'caller' value): Section
* 15.3.4.5 (describing bind()) states that [[Get]] for bound functions
* matches that of Section 15.3.5.4 ([[Get]] for Function instances).
* However, Section 13.3.5.4 has "NOTE: Function objects created using
* Function.prototype.bind use the default [[Get]] internal method."
* The current implementation assumes this means that bound functions
* should not have the special [[Get]] behavior.
*
* The E5.1 spec is also a bit unclear if the TypeError throwing is
* applied if the 'caller' value is a strict bound function. The
* current implementation will throw even for both strict non-bound
* and strict bound functions.
*
* See test-dev-strict-func-as-caller-prop-value.js for quite extensive
* tests.
*
* This exotic behavior is disabled when the non-standard 'caller' property
* is enabled, as it conflicts with the free use of 'caller'.
*/
if (key == DUK_HTHREAD_STRING_CALLER(thr) &&
DUK_TVAL_IS_OBJECT(tv_obj)) {
duk_hobject *orig = DUK_TVAL_GET_OBJECT(tv_obj);
DUK_ASSERT(orig != NULL);
if (DUK_HOBJECT_IS_NONBOUND_FUNCTION(orig) ||
DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(orig)) {
duk_hobject *h;
/* XXX: The TypeError is currently not applied to bound
* functions because the 'strict' flag is not copied by
* bind(). This may or may not be correct, the specification
* only refers to the value being a "strict mode Function
* object" which is ambiguous.
*/
DUK_ASSERT(!DUK_HOBJECT_HAS_BOUND(orig));
h = duk_get_hobject(ctx, -1); /* NULL if not an object */
if (h &&
DUK_HOBJECT_IS_FUNCTION(h) &&
DUK_HOBJECT_HAS_STRICT(h)) {
/* XXX: sufficient to check 'strict', assert for 'is function' */
DUK_ERROR_TYPE(thr, DUK_STR_STRICT_CALLER_READ);
}
}
}
#endif /* !DUK_USE_NONSTD_FUNC_CALLER_PROPERTY */
duk_remove(ctx, -2); /* [key result] -> [result] */
DUK_DDD(DUK_DDDPRINT("-> %!T (found)", (duk_tval *) duk_get_tval(ctx, -1)));
return 1;
}
/*
* HASPROP: Ecmascript property existence check ("in" operator).
*
* Interestingly, the 'in' operator does not do any coercion of
* the target object.
*/
DUK_INTERNAL duk_bool_t duk_hobject_hasprop(duk_hthread *thr, duk_tval *tv_obj, duk_tval *tv_key) {
duk_context *ctx = (duk_context *) thr;
duk_tval tv_key_copy;
duk_hobject *obj;
duk_hstring *key;
duk_uint32_t arr_idx;
duk_bool_t rc;
duk_propdesc desc;
DUK_DDD(DUK_DDDPRINT("hasprop: thr=%p, obj=%p, key=%p (obj -> %!T, key -> %!T)",
(void *) thr, (void *) tv_obj, (void *) tv_key,
(duk_tval *) tv_obj, (duk_tval *) tv_key));
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(tv_obj != NULL);
DUK_ASSERT(tv_key != NULL);
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
DUK_TVAL_SET_TVAL(&tv_key_copy, tv_key);
tv_key = &tv_key_copy;
/*
* The 'in' operator requires an object as its right hand side,
* throwing a TypeError unconditionally if this is not the case.
*
* However, lightfuncs need to behave like fully fledged objects
* here to be maximally transparent, so we need to handle them
* here.
*/
/* XXX: Refactor key coercion so that it's only called once. It can't
* be trivially lifted here because the object must be type checked
* first.
*/
if (DUK_TVAL_IS_OBJECT(tv_obj)) {
obj = DUK_TVAL_GET_OBJECT(tv_obj);
DUK_ASSERT(obj != NULL);
arr_idx = duk__push_tval_to_hstring_arr_idx(ctx, tv_key, &key);
} else if (DUK_TVAL_IS_LIGHTFUNC(tv_obj)) {
arr_idx = duk__push_tval_to_hstring_arr_idx(ctx, tv_key, &key);
if (duk__key_is_lightfunc_ownprop(thr, key)) {
/* FOUND */
rc = 1;
goto pop_and_return;
}
/* If not found, resume existence check from Function.prototype.
* We can just substitute the value in this case; nothing will
* need the original base value (as would be the case with e.g.
* setters/getters.
*/
obj = thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE];
} else {
/* Note: unconditional throw */
DUK_DDD(DUK_DDDPRINT("base object is not an object -> reject"));
DUK_ERROR_TYPE(thr, DUK_STR_INVALID_BASE);
}
/* XXX: fast path for arrays? */
DUK_ASSERT(key != NULL);
DUK_ASSERT(obj != NULL);
DUK_UNREF(arr_idx);
#if defined(DUK_USE_ES6_PROXY)
if (DUK_UNLIKELY(DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(obj))) {
duk_hobject *h_target;
duk_bool_t tmp_bool;
/* XXX: the key in 'key in obj' is string coerced before we're called
* (which is the required behavior in E5/E5.1/E6) so the key is a string
* here already.
*/
if (duk__proxy_check_prop(thr, obj, DUK_STRIDX_HAS, tv_key, &h_target)) {
/* [ ... key trap handler ] */
DUK_DDD(DUK_DDDPRINT("-> proxy object 'has' for key %!T", (duk_tval *) tv_key));
duk_push_hobject(ctx, h_target); /* target */
duk_push_tval(ctx, tv_key); /* P */
duk_call_method(ctx, 2 /*nargs*/);
tmp_bool = duk_to_boolean(ctx, -1);
if (!tmp_bool) {
/* Target object must be checked for a conflicting
* non-configurable property.
*/
if (duk__get_own_propdesc_raw(thr, h_target, key, arr_idx, &desc, 0 /*flags*/)) { /* don't push value */
DUK_DDD(DUK_DDDPRINT("proxy 'has': target has matching property %!O, check for "
"conflicting property; desc.flags=0x%08lx, "
"desc.get=%p, desc.set=%p",
(duk_heaphdr *) key, (unsigned long) desc.flags,
(void *) desc.get, (void *) desc.set));
/* XXX: Extensibility check for target uses IsExtensible(). If we
* implemented the isExtensible trap and didn't reject proxies as
* proxy targets, it should be respected here.
*/
if (!((desc.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) && /* property is configurable and */
DUK_HOBJECT_HAS_EXTENSIBLE(h_target))) { /* ... target is extensible */
DUK_ERROR_TYPE(thr, DUK_STR_PROXY_REJECTED);
}
}
}
duk_pop_2(ctx); /* [ key trap_result ] -> [] */
return tmp_bool;
}
obj = h_target; /* resume check from proxy target */
}
#endif /* DUK_USE_ES6_PROXY */
/* XXX: inline into a prototype walking loop? */
rc = duk__get_propdesc(thr, obj, key, &desc, 0 /*flags*/); /* don't push value */
/* fall through */
pop_and_return:
duk_pop(ctx); /* [ key ] -> [] */
return rc;
}
/*
* HASPROP variant used internally.
*
* This primitive must never throw an error, callers rely on this.
* In particular, don't throw an error for prototype loops; instead,
* pretend like the property doesn't exist if a prototype sanity limit
* is reached.
*
* Does not implement proxy behavior: if applied to a proxy object,
* returns key existence on the proxy object itself.
*/
DUK_INTERNAL duk_bool_t duk_hobject_hasprop_raw(duk_hthread *thr, duk_hobject *obj, duk_hstring *key) {
duk_propdesc dummy;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT(key != NULL);
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
return duk__get_propdesc(thr, obj, key, &dummy, DUK_GETDESC_FLAG_IGNORE_PROTOLOOP); /* don't push value */
}
/*
* Helper: handle Array object 'length' write which automatically
* deletes properties, see E5 Section 15.4.5.1, step 3. This is
* quite tricky to get right.
*
* Used by duk_hobject_putprop().
*/
DUK_LOCAL duk_uint32_t duk__get_old_array_length(duk_hthread *thr, duk_hobject *obj, duk_propdesc *temp_desc) {
duk_bool_t rc;
duk_tval *tv;
duk_uint32_t res;
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
/* This function is only called for objects with array exotic behavior.
* The [[DefineOwnProperty]] algorithm for arrays requires that
* 'length' can never have a value outside the unsigned 32-bit range,
* attempt to write such a value is a RangeError. Here we can thus
* assert for this. When Duktape internals go around the official
* property write interface (doesn't happen often) this assumption is
* easy to accidentally break, so such code must be written carefully.
* See test-bi-array-push-maxlen.js.
*/
rc = duk__get_own_propdesc_raw(thr, obj, DUK_HTHREAD_STRING_LENGTH(thr), DUK__NO_ARRAY_INDEX, temp_desc, 0 /*flags*/); /* don't push value */
DUK_UNREF(rc);
DUK_ASSERT(rc != 0); /* arrays MUST have a 'length' property */
DUK_ASSERT(temp_desc->e_idx >= 0);
tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, temp_desc->e_idx);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); /* array 'length' is always a number, as we coerce it */
DUK_ASSERT(DUK_TVAL_GET_NUMBER(tv) >= 0.0);
DUK_ASSERT(DUK_TVAL_GET_NUMBER(tv) <= (double) 0xffffffffUL);
DUK_ASSERT((duk_double_t) (duk_uint32_t) DUK_TVAL_GET_NUMBER(tv) == DUK_TVAL_GET_NUMBER(tv));
#if defined(DUK_USE_FASTINT)
/* Downgrade checks are not made everywhere, so 'length' is not always
* a fastint (it is a number though). This can be removed once length
* is always guaranteed to be a fastint.
*/
DUK_ASSERT(DUK_TVAL_IS_FASTINT(tv) || DUK_TVAL_IS_DOUBLE(tv));
if (DUK_TVAL_IS_FASTINT(tv)) {
res = (duk_uint32_t) DUK_TVAL_GET_FASTINT_U32(tv);
} else {
res = (duk_uint32_t) DUK_TVAL_GET_DOUBLE(tv);
}
#else
res = (duk_uint32_t) DUK_TVAL_GET_NUMBER(tv);
#endif /* DUK_USE_FASTINT */
return res;
}
DUK_LOCAL duk_uint32_t duk__to_new_array_length_checked(duk_hthread *thr) {
duk_context *ctx = (duk_context *) thr;
duk_uint32_t res;
duk_double_t d;
/* Input value should be on stack top and will be coerced and
* popped. Refuse to update an Array's 'length' to a value
* outside the 32-bit range. Negative zero is accepted as zero.
*/
/* XXX: fastint */
d = duk_to_number(ctx, -1);
res = (duk_uint32_t) d;
if ((duk_double_t) res != d) {
DUK_ERROR_RANGE(thr, DUK_STR_INVALID_ARRAY_LENGTH);
}
duk_pop(ctx);
return res;
}
/* Delete elements required by a smaller length, taking into account
* potentially non-configurable elements. Returns non-zero if all
* elements could be deleted, and zero if all or some elements could
* not be deleted. Also writes final "target length" to 'out_result_len'.
* This is the length value that should go into the 'length' property
* (must be set by the caller). Never throws an error.
*/
DUK_LOCAL
duk_bool_t duk__handle_put_array_length_smaller(duk_hthread *thr,
duk_hobject *obj,
duk_uint32_t old_len,
duk_uint32_t new_len,
duk_bool_t force_flag,
duk_uint32_t *out_result_len) {
duk_uint32_t target_len;
duk_uint_fast32_t i;
duk_uint32_t arr_idx;
duk_hstring *key;
duk_tval *tv;
duk_bool_t rc;
DUK_DDD(DUK_DDDPRINT("new array length smaller than old (%ld -> %ld), "
"probably need to remove elements",
(long) old_len, (long) new_len));
/*
* New length is smaller than old length, need to delete properties above
* the new length.
*
* If array part exists, this is straightforward: array entries cannot
* be non-configurable so this is guaranteed to work.
*
* If array part does not exist, array-indexed values are scattered
* in the entry part, and some may not be configurable (preventing length
* from becoming lower than their index + 1). To handle the algorithm
* in E5 Section 15.4.5.1, step l correctly, we scan the entire property
* set twice.
*/
DUK_ASSERT(thr != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT(new_len < old_len);
DUK_ASSERT(out_result_len != NULL);
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
if (DUK_HOBJECT_HAS_ARRAY_PART(obj)) {
/*
* All defined array-indexed properties are in the array part
* (we assume the array part is comprehensive), and all array
* entries are writable, configurable, and enumerable. Thus,
* nothing can prevent array entries from being deleted.
*/
DUK_DDD(DUK_DDDPRINT("have array part, easy case"));
if (old_len < DUK_HOBJECT_GET_ASIZE(obj)) {
/* XXX: assertion that entries >= old_len are already unused */
i = old_len;
} else {
i = DUK_HOBJECT_GET_ASIZE(obj);
}
DUK_ASSERT(i <= DUK_HOBJECT_GET_ASIZE(obj));
while (i > new_len) {
i--;
tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, i);
DUK_TVAL_SET_UNUSED_UPDREF(thr, tv); /* side effects */
}
*out_result_len = new_len;
return 1;
} else {
/*
* Entries part is a bit more complex
*/
/* Stage 1: find highest preventing non-configurable entry (if any).
* When forcing, ignore non-configurability.
*/
DUK_DDD(DUK_DDDPRINT("no array part, slow case"));
DUK_DDD(DUK_DDDPRINT("array length write, no array part, stage 1: find target_len "
"(highest preventing non-configurable entry (if any))"));
target_len = new_len;
if (force_flag) {
DUK_DDD(DUK_DDDPRINT("array length write, no array part; force flag -> skip stage 1"));
goto skip_stage1;
}
for (i = 0; i < DUK_HOBJECT_GET_ENEXT(obj); i++) {
key = DUK_HOBJECT_E_GET_KEY(thr->heap, obj, i);
if (!key) {
DUK_DDD(DUK_DDDPRINT("skip entry index %ld: null key", (long) i));
continue;
}
if (!DUK_HSTRING_HAS_ARRIDX(key)) {
DUK_DDD(DUK_DDDPRINT("skip entry index %ld: key not an array index", (long) i));
continue;
}
DUK_ASSERT(DUK_HSTRING_HAS_ARRIDX(key)); /* XXX: macro checks for array index flag, which is unnecessary here */
arr_idx = DUK_HSTRING_GET_ARRIDX_SLOW(key);
DUK_ASSERT(arr_idx != DUK__NO_ARRAY_INDEX);
DUK_ASSERT(arr_idx < old_len); /* consistency requires this */
if (arr_idx < new_len) {
DUK_DDD(DUK_DDDPRINT("skip entry index %ld: key is array index %ld, below new_len",
(long) i, (long) arr_idx));
continue;
}
if (DUK_HOBJECT_E_SLOT_IS_CONFIGURABLE(thr->heap, obj, i)) {
DUK_DDD(DUK_DDDPRINT("skip entry index %ld: key is a relevant array index %ld, but configurable",
(long) i, (long) arr_idx));
continue;
}
/* relevant array index is non-configurable, blocks write */
if (arr_idx >= target_len) {
DUK_DDD(DUK_DDDPRINT("entry at index %ld has arr_idx %ld, is not configurable, "
"update target_len %ld -> %ld",
(long) i, (long) arr_idx, (long) target_len,
(long) (arr_idx + 1)));
target_len = arr_idx + 1;
}
}
skip_stage1:
/* stage 2: delete configurable entries above target length */
DUK_DDD(DUK_DDDPRINT("old_len=%ld, new_len=%ld, target_len=%ld",
(long) old_len, (long) new_len, (long) target_len));
DUK_DDD(DUK_DDDPRINT("array length write, no array part, stage 2: remove "
"entries >= target_len"));
for (i = 0; i < DUK_HOBJECT_GET_ENEXT(obj); i++) {
key = DUK_HOBJECT_E_GET_KEY(thr->heap, obj, i);
if (!key) {
DUK_DDD(DUK_DDDPRINT("skip entry index %ld: null key", (long) i));
continue;
}
if (!DUK_HSTRING_HAS_ARRIDX(key)) {
DUK_DDD(DUK_DDDPRINT("skip entry index %ld: key not an array index", (long) i));
continue;
}
DUK_ASSERT(DUK_HSTRING_HAS_ARRIDX(key)); /* XXX: macro checks for array index flag, which is unnecessary here */
arr_idx = DUK_HSTRING_GET_ARRIDX_SLOW(key);
DUK_ASSERT(arr_idx != DUK__NO_ARRAY_INDEX);
DUK_ASSERT(arr_idx < old_len); /* consistency requires this */
if (arr_idx < target_len) {
DUK_DDD(DUK_DDDPRINT("skip entry index %ld: key is array index %ld, below target_len",
(long) i, (long) arr_idx));
continue;
}
DUK_ASSERT(force_flag || DUK_HOBJECT_E_SLOT_IS_CONFIGURABLE(thr->heap, obj, i)); /* stage 1 guarantees */
DUK_DDD(DUK_DDDPRINT("delete entry index %ld: key is array index %ld",
(long) i, (long) arr_idx));
/*
* Slow delete, but we don't care as we're already in a very slow path.
* The delete always succeeds: key has no exotic behavior, property
* is configurable, and no resize occurs.
*/
rc = duk_hobject_delprop_raw(thr, obj, key, force_flag ? DUK_DELPROP_FLAG_FORCE : 0);
DUK_UNREF(rc);
DUK_ASSERT(rc != 0);
}
/* stage 3: update length (done by caller), decide return code */
DUK_DDD(DUK_DDDPRINT("array length write, no array part, stage 3: update length (done by caller)"));
*out_result_len = target_len;
if (target_len == new_len) {
DUK_DDD(DUK_DDDPRINT("target_len matches new_len, return success"));
return 1;
}
DUK_DDD(DUK_DDDPRINT("target_len does not match new_len (some entry prevented "
"full length adjustment), return error"));
return 0;
}
DUK_UNREACHABLE();
}
/* XXX: is valstack top best place for argument? */
DUK_LOCAL duk_bool_t duk__handle_put_array_length(duk_hthread *thr, duk_hobject *obj) {
duk_context *ctx = (duk_context *) thr;
duk_propdesc desc;
duk_uint32_t old_len;
duk_uint32_t new_len;
duk_uint32_t result_len;
duk_tval *tv;
duk_bool_t rc;
DUK_DDD(DUK_DDDPRINT("handling a put operation to array 'length' exotic property, "
"new val: %!T",
(duk_tval *) duk_get_tval(ctx, -1)));
DUK_ASSERT(thr != NULL);
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
DUK_ASSERT(duk_is_valid_index(ctx, -1));
/*
* Get old and new length
*/
old_len = duk__get_old_array_length(thr, obj, &desc);
duk_dup(ctx, -1); /* [in_val in_val] */
new_len = duk__to_new_array_length_checked(thr); /* -> [in_val] */
DUK_DDD(DUK_DDDPRINT("old_len=%ld, new_len=%ld", (long) old_len, (long) new_len));
/*
* Writability check
*/
if (!(desc.flags & DUK_PROPDESC_FLAG_WRITABLE)) {
DUK_DDD(DUK_DDDPRINT("length is not writable, fail"));
return 0;
}
/*
* New length not lower than old length => no changes needed
* (not even array allocation).
*/
if (new_len >= old_len) {
DUK_DDD(DUK_DDDPRINT("new length is higher than old length, just update length, no deletions"));
DUK_ASSERT(desc.e_idx >= 0);
DUK_ASSERT(!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, obj, desc.e_idx));
tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, desc.e_idx);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
/* no decref needed for a number */
DUK_TVAL_SET_FASTINT_U32(tv, new_len);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
return 1;
}
DUK_DDD(DUK_DDDPRINT("new length is lower than old length, probably must delete entries"));
/*
* New length lower than old length => delete elements, then
* update length.
*
* Note: even though a bunch of elements have been deleted, the 'desc' is
* still valid as properties haven't been resized (and entries compacted).
*/
rc = duk__handle_put_array_length_smaller(thr, obj, old_len, new_len, 0 /*force_flag*/, &result_len);
DUK_ASSERT(result_len >= new_len && result_len <= old_len);
DUK_ASSERT(desc.e_idx >= 0);
DUK_ASSERT(!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, obj, desc.e_idx));
tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, desc.e_idx);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
/* no decref needed for a number */
DUK_TVAL_SET_FASTINT_U32(tv, result_len);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
/* XXX: shrink array allocation or entries compaction here? */
return rc;
}
/*
* PUTPROP: Ecmascript property write.
*
* Unlike Ecmascript primitive which returns nothing, returns 1 to indicate
* success and 0 to indicate failure (assuming throw is not set).
*
* This is an extremely tricky function. Some examples:
*
* * Currently a decref may trigger a GC, which may compact an object's
* property allocation. Consequently, any entry indices (e_idx) will
* be potentially invalidated by a decref.
*
* * Exotic behaviors (strings, arrays, arguments object) require,
* among other things:
*
* - Preprocessing before and postprocessing after an actual property
* write. For example, array index write requires pre-checking the
* array 'length' property for access control, and may require an
* array 'length' update after the actual write has succeeded (but
* not if it fails).
*
* - Deletion of multiple entries, as a result of array 'length' write.
*
* * Input values are taken as pointers which may point to the valstack.
* If valstack is resized because of the put (this may happen at least
* when the array part is abandoned), the pointers can be invalidated.
* (We currently make a copy of all of the input values to avoid issues.)
*/
DUK_INTERNAL duk_bool_t duk_hobject_putprop(duk_hthread *thr, duk_tval *tv_obj, duk_tval *tv_key, duk_tval *tv_val, duk_bool_t throw_flag) {
duk_context *ctx = (duk_context *) thr;
duk_tval tv_obj_copy;
duk_tval tv_key_copy;
duk_tval tv_val_copy;
duk_hobject *orig = NULL; /* NULL if tv_obj is primitive */
duk_hobject *curr;
duk_hstring *key = NULL;
duk_propdesc desc;
duk_tval *tv;
duk_uint32_t arr_idx;
duk_bool_t rc;
duk_int_t e_idx;
duk_uint_t sanity;
duk_uint32_t new_array_length = 0; /* 0 = no update */
DUK_DDD(DUK_DDDPRINT("putprop: thr=%p, obj=%p, key=%p, val=%p, throw=%ld "
"(obj -> %!T, key -> %!T, val -> %!T)",
(void *) thr, (void *) tv_obj, (void *) tv_key, (void *) tv_val,
(long) throw_flag, (duk_tval *) tv_obj, (duk_tval *) tv_key, (duk_tval *) tv_val));
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(tv_obj != NULL);
DUK_ASSERT(tv_key != NULL);
DUK_ASSERT(tv_val != NULL);
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
/*
* Make a copy of tv_obj, tv_key, and tv_val to avoid any issues of
* them being invalidated by a valstack resize.
*
* XXX: this is an overkill for some paths, so optimize this later
* (or maybe switch to a stack arguments model entirely).
*/
DUK_TVAL_SET_TVAL(&tv_obj_copy, tv_obj);
DUK_TVAL_SET_TVAL(&tv_key_copy, tv_key);
DUK_TVAL_SET_TVAL(&tv_val_copy, tv_val);
tv_obj = &tv_obj_copy;
tv_key = &tv_key_copy;
tv_val = &tv_val_copy;
/*
* Coercion and fast path processing.
*/
switch (DUK_TVAL_GET_TAG(tv_obj)) {
case DUK_TAG_UNDEFINED:
case DUK_TAG_NULL: {
/* Note: unconditional throw */
DUK_DDD(DUK_DDDPRINT("base object is undefined or null -> reject (object=%!iT)",
(duk_tval *) tv_obj));
#if defined(DUK_USE_PARANOID_ERRORS)
DUK_ERROR_TYPE(thr, DUK_STR_INVALID_BASE);
#else
DUK_ERROR_FMT2(thr, DUK_ERR_TYPE_ERROR, "cannot write property %s of %s",
duk_push_string_tval_readable(ctx, tv_key), duk_push_string_tval_readable(ctx, tv_obj));
#endif
return 0;
}
case DUK_TAG_BOOLEAN: {
DUK_DDD(DUK_DDDPRINT("base object is a boolean, start lookup from boolean prototype"));
curr = thr->builtins[DUK_BIDX_BOOLEAN_PROTOTYPE];
break;
}
case DUK_TAG_STRING: {
duk_hstring *h = DUK_TVAL_GET_STRING(tv_obj);
/*
* Note: currently no fast path for array index writes.
* They won't be possible anyway as strings are immutable.
*/
DUK_ASSERT(key == NULL);
arr_idx = duk__push_tval_to_hstring_arr_idx(ctx, tv_key, &key);
DUK_ASSERT(key != NULL);
if (key == DUK_HTHREAD_STRING_LENGTH(thr)) {
goto fail_not_writable;
}
if (arr_idx != DUK__NO_ARRAY_INDEX &&
arr_idx < DUK_HSTRING_GET_CHARLEN(h)) {
goto fail_not_writable;
}
DUK_DDD(DUK_DDDPRINT("base object is a string, start lookup from string prototype"));
curr = thr->builtins[DUK_BIDX_STRING_PROTOTYPE];
goto lookup; /* avoid double coercion */
}
case DUK_TAG_OBJECT: {
orig = DUK_TVAL_GET_OBJECT(tv_obj);
DUK_ASSERT(orig != NULL);
#if defined(DUK_USE_ROM_OBJECTS)
/* With this check in place fast paths won't need read-only
* object checks. This is technically incorrect if there are
* setters that cause no writes to ROM objects, but current
* built-ins don't have such setters.
*/
if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) orig)) {
DUK_DD(DUK_DDPRINT("attempt to putprop on read-only target object"));
goto fail_not_writable_no_pop; /* Must avoid duk_pop() in exit path */
}
#endif
/* The fast path for array property put is not fully compliant:
* If one places conflicting number-indexed properties into
* Array.prototype (for example, a non-writable Array.prototype[7])
* the fast path will incorrectly ignore them.
*
* This fast path could be made compliant by falling through
* to the slow path if the previous value was UNUSED. This would
* also remove the need to check for extensibility. Right now a
* non-extensible array is slower than an extensible one as far
* as writes are concerned.
*
* The fast path behavior is documented in more detail here:
* tests/ecmascript/test-misc-array-fast-write.js
*/
if (duk__putprop_shallow_fastpath_array_tval(thr, orig, tv_key, tv_val, &desc) != 0) {
DUK_DDD(DUK_DDDPRINT("array fast path success"));
return 1;
}
if (duk__putprop_fastpath_bufobj_tval(thr, orig, tv_key, tv_val) != 0) {
DUK_DDD(DUK_DDDPRINT("base is bufobj, key is a number, bufferobject fast path"));
return 1;
}
#if defined(DUK_USE_ES6_PROXY)
if (DUK_UNLIKELY(DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(orig))) {
duk_hobject *h_target;
duk_bool_t tmp_bool;
if (duk__proxy_check_prop(thr, orig, DUK_STRIDX_SET, tv_key, &h_target)) {
/* -> [ ... trap handler ] */
DUK_DDD(DUK_DDDPRINT("-> proxy object 'set' for key %!T", (duk_tval *) tv_key));
duk_push_hobject(ctx, h_target); /* target */
duk_push_tval(ctx, tv_key); /* P */
duk_push_tval(ctx, tv_val); /* V */
duk_push_tval(ctx, tv_obj); /* Receiver: Proxy object */
duk_call_method(ctx, 4 /*nargs*/);
tmp_bool = duk_to_boolean(ctx, -1);
duk_pop(ctx);
if (!tmp_bool) {
goto fail_proxy_rejected;
}
/* Target object must be checked for a conflicting
* non-configurable property.
*/
arr_idx = duk__push_tval_to_hstring_arr_idx(ctx, tv_key, &key);
DUK_ASSERT(key != NULL);
if (duk__get_own_propdesc_raw(thr, h_target, key, arr_idx, &desc, DUK_GETDESC_FLAG_PUSH_VALUE)) {
duk_tval *tv_targ = duk_require_tval(ctx, -1);
duk_bool_t datadesc_reject;
duk_bool_t accdesc_reject;
DUK_DDD(DUK_DDDPRINT("proxy 'set': target has matching property %!O, check for "
"conflicting property; tv_val=%!T, tv_targ=%!T, desc.flags=0x%08lx, "
"desc.get=%p, desc.set=%p",
(duk_heaphdr *) key, (duk_tval *) tv_val, (duk_tval *) tv_targ,
(unsigned long) desc.flags,
(void *) desc.get, (void *) desc.set));
datadesc_reject = !(desc.flags & DUK_PROPDESC_FLAG_ACCESSOR) &&
!(desc.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) &&
!(desc.flags & DUK_PROPDESC_FLAG_WRITABLE) &&
!duk_js_samevalue(tv_val, tv_targ);
accdesc_reject = (desc.flags & DUK_PROPDESC_FLAG_ACCESSOR) &&
!(desc.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) &&
(desc.set == NULL);
if (datadesc_reject || accdesc_reject) {
DUK_ERROR_TYPE(thr, DUK_STR_PROXY_REJECTED);
}
duk_pop_2(ctx);
} else {
duk_pop(ctx);
}
return 1; /* success */
}
orig = h_target; /* resume write to target */
DUK_TVAL_SET_OBJECT(tv_obj, orig);
}
#endif /* DUK_USE_ES6_PROXY */
curr = orig;
break;
}
case DUK_TAG_BUFFER: {
duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv_obj);
duk_int_t pop_count = 0;
/*
* Because buffer values may be looped over and read/written
* from, an array index fast path is important.
*/
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv_key)) {
arr_idx = duk__tval_fastint_to_arr_idx(tv_key);
DUK_DDD(DUK_DDDPRINT("base object buffer, key is a fast-path fastint; arr_idx %ld", (long) arr_idx));
pop_count = 0;
} else
#endif
if (DUK_TVAL_IS_NUMBER(tv_key)) {
arr_idx = duk__tval_number_to_arr_idx(tv_key);
DUK_DDD(DUK_DDDPRINT("base object buffer, key is a fast-path number; arr_idx %ld", (long) arr_idx));
pop_count = 0;
} else {
arr_idx = duk__push_tval_to_hstring_arr_idx(ctx, tv_key, &key);
DUK_ASSERT(key != NULL);
DUK_DDD(DUK_DDDPRINT("base object buffer, key is a non-fast-path number; after "
"coercion key is %!T, arr_idx %ld",
(duk_tval *) duk_get_tval(ctx, -1), (long) arr_idx));
pop_count = 1;
}
if (arr_idx != DUK__NO_ARRAY_INDEX &&
arr_idx < DUK_HBUFFER_GET_SIZE(h)) {
duk_uint8_t *data;
DUK_DDD(DUK_DDDPRINT("writing to buffer data at index %ld", (long) arr_idx));
data = (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h);
/* XXX: duk_to_int() ensures we'll get 8 lowest bits as
* as input is within duk_int_t range (capped outside it).
*/
#if defined(DUK_USE_FASTINT)
/* Buffer writes are often integers. */
if (DUK_TVAL_IS_FASTINT(tv_val)) {
data[arr_idx] = (duk_uint8_t) DUK_TVAL_GET_FASTINT_U32(tv_val);
}
else
#endif
{
duk_push_tval(ctx, tv_val);
data[arr_idx] = (duk_uint8_t) duk_to_uint32(ctx, -1);
pop_count++;
}
duk_pop_n(ctx, pop_count);
DUK_DDD(DUK_DDDPRINT("result: success (buffer data write)"));
return 1;
}
if (pop_count == 0) {
/* This is a pretty awkward control flow, but we need to recheck the
* key coercion here.
*/
arr_idx = duk__push_tval_to_hstring_arr_idx(ctx, tv_key, &key);
DUK_ASSERT(key != NULL);
DUK_DDD(DUK_DDDPRINT("base object buffer, key is a non-fast-path number; after "
"coercion key is %!T, arr_idx %ld",
(duk_tval *) duk_get_tval(ctx, -1), (long) arr_idx));
}
if (key == DUK_HTHREAD_STRING_LENGTH(thr) ||
key == DUK_HTHREAD_STRING_BYTE_LENGTH(thr) ||
key == DUK_HTHREAD_STRING_BYTE_OFFSET(thr) ||
key == DUK_HTHREAD_STRING_BYTES_PER_ELEMENT(thr)) {
goto fail_not_writable;
}
DUK_DDD(DUK_DDDPRINT("base object is a buffer, start lookup from buffer prototype"));
curr = thr->builtins[DUK_BIDX_BUFFER_PROTOTYPE];
goto lookup; /* avoid double coercion */
}
case DUK_TAG_POINTER: {
DUK_DDD(DUK_DDDPRINT("base object is a pointer, start lookup from pointer prototype"));
curr = thr->builtins[DUK_BIDX_POINTER_PROTOTYPE];
break;
}
case DUK_TAG_LIGHTFUNC: {
/* All lightfunc own properties are non-writable and the lightfunc
* is considered non-extensible. However, the write may be captured
* by an inherited setter which means we can't stop the lookup here.
*/
arr_idx = duk__push_tval_to_hstring_arr_idx(ctx, tv_key, &key);
if (duk__key_is_lightfunc_ownprop(thr, key)) {
goto fail_not_writable;
}
DUK_DDD(DUK_DDDPRINT("base object is a lightfunc, start lookup from function prototype"));
curr = thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE];
goto lookup; /* avoid double coercion */
}
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT:
#endif
default: {
/* number */
DUK_DDD(DUK_DDDPRINT("base object is a number, start lookup from number prototype"));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_obj));
curr = thr->builtins[DUK_BIDX_NUMBER_PROTOTYPE];
break;
}
}
DUK_ASSERT(key == NULL);
arr_idx = duk__push_tval_to_hstring_arr_idx(ctx, tv_key, &key);
DUK_ASSERT(key != NULL);
lookup:
/*
* Check whether the property already exists in the prototype chain.
* Note that the actual write goes into the original base object
* (except if an accessor property captures the write).
*/
/* [key] */
DUK_ASSERT(curr != NULL);
sanity = DUK_HOBJECT_PROTOTYPE_CHAIN_SANITY;
do {
if (!duk__get_own_propdesc_raw(thr, curr, key, arr_idx, &desc, 0 /*flags*/)) { /* don't push value */
goto next_in_chain;
}
if (desc.flags & DUK_PROPDESC_FLAG_ACCESSOR) {
/*
* Found existing accessor property (own or inherited).
* Call setter with 'this' set to orig, and value as the only argument.
* Setter calls are OK even for ROM objects.
*
* Note: no exotic arguments object behavior, because [[Put]] never
* calls [[DefineOwnProperty]] (E5 Section 8.12.5, step 5.b).
*/
duk_hobject *setter;
DUK_DD(DUK_DDPRINT("put to an own or inherited accessor, calling setter"));
setter = DUK_HOBJECT_E_GET_VALUE_SETTER(thr->heap, curr, desc.e_idx);
if (!setter) {
goto fail_no_setter;
}
duk_push_hobject(ctx, setter);
duk_push_tval(ctx, tv_obj); /* note: original, uncoerced base */
duk_push_tval(ctx, tv_val); /* [key setter this val] */
#ifdef DUK_USE_NONSTD_SETTER_KEY_ARGUMENT
duk_dup(ctx, -4);
duk_call_method(ctx, 2); /* [key setter this val key] -> [key retval] */
#else
duk_call_method(ctx, 1); /* [key setter this val] -> [key retval] */
#endif
duk_pop(ctx); /* ignore retval -> [key] */
goto success_no_arguments_exotic;
}
if (orig == NULL) {
/*
* Found existing own or inherited plain property, but original
* base is a primitive value.
*/
DUK_DD(DUK_DDPRINT("attempt to create a new property in a primitive base object"));
goto fail_base_primitive;
}
if (curr != orig) {
/*
* Found existing inherited plain property.
* Do an access control check, and if OK, write
* new property to 'orig'.
*/
if (!DUK_HOBJECT_HAS_EXTENSIBLE(orig)) {
DUK_DD(DUK_DDPRINT("found existing inherited plain property, but original object is not extensible"));
goto fail_not_extensible;
}
if (!(desc.flags & DUK_PROPDESC_FLAG_WRITABLE)) {
DUK_DD(DUK_DDPRINT("found existing inherited plain property, original object is extensible, but inherited property is not writable"));
goto fail_not_writable;
}
DUK_DD(DUK_DDPRINT("put to new property, object extensible, inherited property found and is writable"));
goto create_new;
} else {
/*
* Found existing own (non-inherited) plain property.
* Do an access control check and update in place.
*/
if (!(desc.flags & DUK_PROPDESC_FLAG_WRITABLE)) {
DUK_DD(DUK_DDPRINT("found existing own (non-inherited) plain property, but property is not writable"));
goto fail_not_writable;
}
if (desc.flags & DUK_PROPDESC_FLAG_VIRTUAL) {
DUK_DD(DUK_DDPRINT("found existing own (non-inherited) virtual property, property is writable"));
if (DUK_HOBJECT_IS_BUFFEROBJECT(curr)) {
duk_hbufferobject *h_bufobj;
duk_uint_t byte_off;
duk_small_uint_t elem_size;
h_bufobj = (duk_hbufferobject *) curr;
DUK_ASSERT_HBUFFEROBJECT_VALID(h_bufobj);
DUK_DD(DUK_DDPRINT("writable virtual property is in buffer object"));
/* Careful with wrapping: arr_idx upshift may easily wrap, whereas
* length downshift won't.
*/
if (arr_idx < (h_bufobj->length >> h_bufobj->shift)) {
duk_uint8_t *data;
DUK_DDD(DUK_DDDPRINT("writing to buffer data at index %ld", (long) arr_idx));
DUK_ASSERT(arr_idx != DUK__NO_ARRAY_INDEX); /* index/length check guarantees */
byte_off = arr_idx << h_bufobj->shift; /* no wrap assuming h_bufobj->length is valid */
elem_size = 1 << h_bufobj->shift;
/* Coerce to number before validating pointers etc so that the
* number coercions in duk_hbufferobject_validated_write() are
* guaranteed to be side effect free and not invalidate the
* pointer checks we do here.
*/
duk_push_tval(ctx, tv_val);
duk_to_number(ctx, -1);
if (h_bufobj->buf != NULL && DUK_HBUFFEROBJECT_VALID_BYTEOFFSET_EXCL(h_bufobj, byte_off + elem_size)) {
data = (duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_bufobj->buf) + h_bufobj->offset + byte_off;
duk_hbufferobject_validated_write(ctx, h_bufobj, data, elem_size);
} else {
DUK_D(DUK_DPRINT("bufferobject access out of underlying buffer, ignoring (write skipped)"));
}
duk_pop(ctx);
goto success_no_arguments_exotic;
}
}
goto fail_internal; /* should not happen */
}
DUK_DD(DUK_DDPRINT("put to existing own plain property, property is writable"));
goto update_old;
}
DUK_UNREACHABLE();
next_in_chain:
/* XXX: option to pretend property doesn't exist if sanity limit is
* hit might be useful.
*/
if (sanity-- == 0) {
DUK_ERROR_RANGE(thr, DUK_STR_PROTOTYPE_CHAIN_LIMIT);
}
curr = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, curr);
} while (curr);
/*
* Property not found in prototype chain.
*/
DUK_DDD(DUK_DDDPRINT("property not found in prototype chain"));
if (orig == NULL) {
DUK_DD(DUK_DDPRINT("attempt to create a new property in a primitive base object"));
goto fail_base_primitive;
}
if (!DUK_HOBJECT_HAS_EXTENSIBLE(orig)) {
DUK_DD(DUK_DDPRINT("put to a new property (not found in prototype chain), but original object not extensible"));
goto fail_not_extensible;
}
goto create_new;
update_old:
/*
* Update an existing property of the base object.
*/
/* [key] */
DUK_DDD(DUK_DDDPRINT("update an existing property of the original object"));
DUK_ASSERT(orig != NULL);
#if defined(DUK_USE_ROM_OBJECTS)
/* This should not happen because DUK_TAG_OBJECT case checks
* for this already, but check just in case.
*/
if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) orig)) {
goto fail_not_writable;
}
#endif
/* Although there are writable virtual properties (e.g. plain buffer
* and buffer object number indices), they are handled before we come
* here.
*/
DUK_ASSERT((desc.flags & DUK_PROPDESC_FLAG_VIRTUAL) == 0);
DUK_ASSERT(desc.a_idx >= 0 || desc.e_idx >= 0);
if (DUK_HOBJECT_HAS_EXOTIC_ARRAY(orig) &&
key == DUK_HTHREAD_STRING_LENGTH(thr)) {
/*
* Write to 'length' of an array is a very complex case
* handled in a helper which updates both the array elements
* and writes the new 'length'. The write may result in an
* unconditional RangeError or a partial write (indicated
* by a return code).
*
* Note: the helper has an unnecessary writability check
* for 'length', we already know it is writable.
*/
DUK_DDD(DUK_DDDPRINT("writing existing 'length' property to array exotic, invoke complex helper"));
/* XXX: the helper currently assumes stack top contains new
* 'length' value and the whole calling convention is not very
* compatible with what we need.
*/
duk_push_tval(ctx, tv_val); /* [key val] */
rc = duk__handle_put_array_length(thr, orig);
duk_pop(ctx); /* [key val] -> [key] */
if (!rc) {
goto fail_array_length_partial;
}
/* key is 'length', cannot match argument exotic behavior */
goto success_no_arguments_exotic;
}
if (desc.e_idx >= 0) {
tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, orig, desc.e_idx);
DUK_DDD(DUK_DDDPRINT("previous entry value: %!iT", (duk_tval *) tv));
DUK_TVAL_SET_TVAL_UPDREF(thr, tv, tv_val); /* side effects */
/* don't touch property attributes or hash part */
DUK_DD(DUK_DDPRINT("put to an existing entry at index %ld -> new value %!iT",
(long) desc.e_idx, (duk_tval *) tv));
} else {
/* Note: array entries are always writable, so the writability check
* above is pointless for them. The check could be avoided with some
* refactoring but is probably not worth it.
*/
DUK_ASSERT(desc.a_idx >= 0);
tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, orig, desc.a_idx);
DUK_DDD(DUK_DDDPRINT("previous array value: %!iT", (duk_tval *) tv));
DUK_TVAL_SET_TVAL_UPDREF(thr, tv, tv_val); /* side effects */
DUK_DD(DUK_DDPRINT("put to an existing array entry at index %ld -> new value %!iT",
(long) desc.a_idx, (duk_tval *) tv));
}
/* Regardless of whether property is found in entry or array part,
* it may have arguments exotic behavior (array indices may reside
* in entry part for abandoned / non-existent array parts).
*/
goto success_with_arguments_exotic;
create_new:
/*
* Create a new property in the original object.
*
* Exotic properties need to be reconsidered here from a write
* perspective (not just property attributes perspective).
* However, the property does not exist in the object already,
* so this limits the kind of exotic properties that apply.
*/
/* [key] */
DUK_DDD(DUK_DDDPRINT("create new property to original object"));
DUK_ASSERT(orig != NULL);
#if defined(DUK_USE_ROM_OBJECTS)
/* This should not happen because DUK_TAG_OBJECT case checks
* for this already, but check just in case.
*/
if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) orig)) {
goto fail_not_writable;
}
#endif
/* Not possible because array object 'length' is present
* from its creation and cannot be deleted, and is thus
* caught as an existing property above.
*/
DUK_ASSERT(!(DUK_HOBJECT_HAS_EXOTIC_ARRAY(orig) &&
key == DUK_HTHREAD_STRING_LENGTH(thr)));
if (DUK_HOBJECT_HAS_EXOTIC_ARRAY(orig) &&
arr_idx != DUK__NO_ARRAY_INDEX) {
/* automatic length update */
duk_uint32_t old_len;
old_len = duk__get_old_array_length(thr, orig, &desc);
if (arr_idx >= old_len) {
DUK_DDD(DUK_DDDPRINT("write new array entry requires length update "
"(arr_idx=%ld, old_len=%ld)",
(long) arr_idx, (long) old_len));
if (!(desc.flags & DUK_PROPDESC_FLAG_WRITABLE)) {
DUK_DD(DUK_DDPRINT("attempt to extend array, but array 'length' is not writable"));
goto fail_not_writable;
}
/* Note: actual update happens once write has been completed
* without error below. The write should always succeed
* from a specification viewpoint, but we may e.g. run out
* of memory. It's safer in this order.
*/
DUK_ASSERT(arr_idx != 0xffffffffUL);
new_array_length = arr_idx + 1; /* flag for later write */
} else {
DUK_DDD(DUK_DDDPRINT("write new array entry does not require length update "
"(arr_idx=%ld, old_len=%ld)",
(long) arr_idx, (long) old_len));
}
}
/* write_to_array_part: */
/*
* Write to array part?
*
* Note: array abandonding requires a property resize which uses
* 'rechecks' valstack for temporaries and may cause any existing
* valstack pointers to be invalidated. To protect against this,
* tv_obj, tv_key, and tv_val are copies of the original inputs.
*/
if (arr_idx != DUK__NO_ARRAY_INDEX &&
DUK_HOBJECT_HAS_ARRAY_PART(orig)) {
if (arr_idx < DUK_HOBJECT_GET_ASIZE(orig)) {
goto no_array_growth;
}
/*
* Array needs to grow, but we don't want it becoming too sparse.
* If it were to become sparse, abandon array part, moving all
* array entries into the entries part (for good).
*
* Since we don't keep track of actual density (used vs. size) of
* the array part, we need to estimate somehow. The check is made
* in two parts:
*
* - Check whether the resize need is small compared to the
* current size (relatively); if so, resize without further
* checking (essentially we assume that the original part is
* "dense" so that the result would be dense enough).
*
* - Otherwise, compute the resize using an actual density
* measurement based on counting the used array entries.
*/
DUK_DDD(DUK_DDDPRINT("write to new array requires array resize, decide whether to do a "
"fast resize without abandon check (arr_idx=%ld, old_size=%ld)",
(long) arr_idx, (long) DUK_HOBJECT_GET_ASIZE(orig)));
if (duk__abandon_array_slow_check_required(arr_idx, DUK_HOBJECT_GET_ASIZE(orig))) {
duk_uint32_t old_used;
duk_uint32_t old_size;
DUK_DDD(DUK_DDDPRINT("=> fast check is NOT OK, do slow check for array abandon"));
duk__compute_a_stats(thr, orig, &old_used, &old_size);
DUK_DDD(DUK_DDDPRINT("abandon check, array stats: old_used=%ld, old_size=%ld, arr_idx=%ld",
(long) old_used, (long) old_size, (long) arr_idx));
/* Note: intentionally use approximations to shave a few instructions:
* a_used = old_used (accurate: old_used + 1)
* a_size = arr_idx (accurate: arr_idx + 1)
*/
if (duk__abandon_array_density_check(old_used, arr_idx)) {
DUK_DD(DUK_DDPRINT("write to new array entry beyond current length, "
"decided to abandon array part (would become too sparse)"));
/* abandoning requires a props allocation resize and
* 'rechecks' the valstack, invalidating any existing
* valstack value pointers!
*/
duk__abandon_array_checked(thr, orig);
DUK_ASSERT(!DUK_HOBJECT_HAS_ARRAY_PART(orig));
goto write_to_entry_part;
}
DUK_DDD(DUK_DDDPRINT("=> decided to keep array part"));
} else {
DUK_DDD(DUK_DDDPRINT("=> fast resize is OK"));
}
DUK_DD(DUK_DDPRINT("write to new array entry beyond current length, "
"decided to extend current allocation"));
duk__grow_props_for_array_item(thr, orig, arr_idx);
no_array_growth:
/* Note: assume array part is comprehensive, so that either
* the write goes to the array part, or we've abandoned the
* array above (and will not come here).
*/
DUK_ASSERT(DUK_HOBJECT_HAS_ARRAY_PART(orig));
DUK_ASSERT(arr_idx < DUK_HOBJECT_GET_ASIZE(orig));
tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, orig, arr_idx);
/* prev value must be unused, no decref */
DUK_ASSERT(DUK_TVAL_IS_UNUSED(tv));
DUK_TVAL_SET_TVAL(tv, tv_val);
DUK_TVAL_INCREF(thr, tv);
DUK_DD(DUK_DDPRINT("put to new array entry: %ld -> %!T",
(long) arr_idx, (duk_tval *) tv));
/* Note: array part values are [[Writable]], [[Enumerable]],
* and [[Configurable]] which matches the required attributes
* here.
*/
goto entry_updated;
}
write_to_entry_part:
/*
* Write to entry part
*/
/* entry allocation updates hash part and increases the key
* refcount; may need a props allocation resize but doesn't
* 'recheck' the valstack.
*/
e_idx = duk__alloc_entry_checked(thr, orig, key);
DUK_ASSERT(e_idx >= 0);
tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, orig, e_idx);
/* prev value can be garbage, no decref */
DUK_TVAL_SET_TVAL(tv, tv_val);
DUK_TVAL_INCREF(thr, tv);
DUK_HOBJECT_E_SET_FLAGS(thr->heap, orig, e_idx, DUK_PROPDESC_FLAGS_WEC);
goto entry_updated;
entry_updated:
/*
* Possible pending array length update, which must only be done
* if the actual entry write succeeded.
*/
if (new_array_length > 0) {
/*
* Note: zero works as a "no update" marker because the new length
* can never be zero after a new property is written.
*
* Note: must re-lookup because calls above (e.g. duk__alloc_entry_checked())
* may realloc and compact properties and hence change e_idx.
*/
DUK_DDD(DUK_DDDPRINT("write successful, pending array length update to: %ld",
(long) new_array_length));
rc = duk__get_own_propdesc_raw(thr, orig, DUK_HTHREAD_STRING_LENGTH(thr), DUK__NO_ARRAY_INDEX, &desc, 0 /*flags*/); /* don't push value */
DUK_UNREF(rc);
DUK_ASSERT(rc != 0);
DUK_ASSERT(desc.e_idx >= 0);
tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, orig, desc.e_idx);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
/* no need for decref/incref because value is a number */
DUK_TVAL_SET_FASTINT_U32(tv, new_array_length);
}
/*
* Arguments exotic behavior not possible for new properties: all
* magically bound properties are initially present in the arguments
* object, and if they are deleted, the binding is also removed from
* parameter map.
*/
goto success_no_arguments_exotic;
success_with_arguments_exotic:
/*
* Arguments objects have exotic [[DefineOwnProperty]] which updates
* the internal 'map' of arguments for writes to currently mapped
* arguments. More conretely, writes to mapped arguments generate
* a write to a bound variable.
*
* The [[Put]] algorithm invokes [[DefineOwnProperty]] for existing
* data properties and new properties, but not for existing accessors.
* Hence, in E5 Section 10.6 ([[DefinedOwnProperty]] algorithm), we
* have a Desc with 'Value' (and possibly other properties too), and
* we end up in step 5.b.i.
*/
if (arr_idx != DUK__NO_ARRAY_INDEX &&
DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(orig)) {
/* Note: only numbered indices are relevant, so arr_idx fast reject
* is good (this is valid unless there are more than 4**32-1 arguments).
*/
DUK_DDD(DUK_DDDPRINT("putprop successful, arguments exotic behavior needed"));
/* Note: we can reuse 'desc' here */
/* XXX: top of stack must contain value, which helper doesn't touch,
* rework to use tv_val directly?
*/
duk_push_tval(ctx, tv_val);
(void) duk__check_arguments_map_for_put(thr, orig, key, &desc, throw_flag);
duk_pop(ctx);
}
/* fall thru */
success_no_arguments_exotic:
/* shared exit path now */
DUK_DDD(DUK_DDDPRINT("result: success"));
duk_pop(ctx); /* remove key */
return 1;
#if defined(DUK_USE_ES6_PROXY)
fail_proxy_rejected:
DUK_DDD(DUK_DDDPRINT("result: error, proxy rejects"));
if (throw_flag) {
DUK_ERROR_TYPE(thr, DUK_STR_PROXY_REJECTED);
}
/* Note: no key on stack */
return 0;
#endif
fail_base_primitive:
DUK_DDD(DUK_DDDPRINT("result: error, base primitive"));
if (throw_flag) {
#if defined(DUK_USE_PARANOID_ERRORS)
DUK_ERROR_TYPE(thr, DUK_STR_INVALID_BASE);
#else
DUK_ERROR_FMT2(thr, DUK_ERR_TYPE_ERROR, "cannot write property %s of %s",
duk_push_string_tval_readable(ctx, tv_key), duk_push_string_tval_readable(ctx, tv_obj));
#endif
}
duk_pop(ctx); /* remove key */
return 0;
fail_not_extensible:
DUK_DDD(DUK_DDDPRINT("result: error, not extensible"));
if (throw_flag) {
DUK_ERROR_TYPE(thr, DUK_STR_NOT_EXTENSIBLE);
}
duk_pop(ctx); /* remove key */
return 0;
fail_not_writable:
DUK_DDD(DUK_DDDPRINT("result: error, not writable"));
if (throw_flag) {
DUK_ERROR_TYPE(thr, DUK_STR_NOT_WRITABLE);
}
duk_pop(ctx); /* remove key */
return 0;
#if defined(DUK_USE_ROM_OBJECTS)
fail_not_writable_no_pop:
DUK_DDD(DUK_DDDPRINT("result: error, not writable"));
if (throw_flag) {
DUK_ERROR_TYPE(thr, DUK_STR_NOT_WRITABLE);
}
return 0;
#endif
fail_array_length_partial:
DUK_DDD(DUK_DDDPRINT("result: error, array length write only partially successful"));
if (throw_flag) {
DUK_ERROR_TYPE(thr, DUK_STR_ARRAY_LENGTH_WRITE_FAILED);
}
duk_pop(ctx); /* remove key */
return 0;
fail_no_setter:
DUK_DDD(DUK_DDDPRINT("result: error, accessor property without setter"));
if (throw_flag) {
DUK_ERROR_TYPE(thr, DUK_STR_SETTER_UNDEFINED);
}
duk_pop(ctx); /* remove key */
return 0;
fail_internal:
DUK_DDD(DUK_DDDPRINT("result: error, internal"));
if (throw_flag) {
DUK_ERROR_INTERNAL_DEFMSG(thr);
}
duk_pop(ctx); /* remove key */
return 0;
}
/*
* Ecmascript compliant [[Delete]](P, Throw).
*/
DUK_INTERNAL duk_bool_t duk_hobject_delprop_raw(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_small_uint_t flags) {
duk_propdesc desc;
duk_tval *tv;
duk_uint32_t arr_idx;
duk_bool_t throw_flag;
duk_bool_t force_flag;
throw_flag = (flags & DUK_DELPROP_FLAG_THROW);
force_flag = (flags & DUK_DELPROP_FLAG_FORCE);
DUK_DDD(DUK_DDDPRINT("delprop_raw: thr=%p, obj=%p, key=%p, throw=%ld, force=%ld (obj -> %!O, key -> %!O)",
(void *) thr, (void *) obj, (void *) key, (long) throw_flag, (long) force_flag,
(duk_heaphdr *) obj, (duk_heaphdr *) key));
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT(key != NULL);
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
arr_idx = DUK_HSTRING_GET_ARRIDX_FAST(key);
/* 0 = don't push current value */
if (!duk__get_own_propdesc_raw(thr, obj, key, arr_idx, &desc, 0 /*flags*/)) { /* don't push value */
DUK_DDD(DUK_DDDPRINT("property not found, succeed always"));
goto success;
}
#if defined(DUK_USE_ROM_OBJECTS)
if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)) {
DUK_DD(DUK_DDPRINT("attempt to delprop on read-only target object"));
goto fail_not_configurable;
}
#endif
if ((desc.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) == 0 && !force_flag) {
goto fail_not_configurable;
}
if (desc.a_idx < 0 && desc.e_idx < 0) {
/* Currently there are no deletable virtual properties, but
* with force_flag we might attempt to delete one.
*/
goto fail_virtual;
}
if (desc.a_idx >= 0) {
DUK_ASSERT(desc.e_idx < 0);
tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, desc.a_idx);
DUK_TVAL_SET_UNUSED_UPDREF(thr, tv); /* side effects */
goto success;
} else {
DUK_ASSERT(desc.a_idx < 0);
/* remove hash entry (no decref) */
#if defined(DUK_USE_HOBJECT_HASH_PART)
if (desc.h_idx >= 0) {
duk_uint32_t *h_base = DUK_HOBJECT_H_GET_BASE(thr->heap, obj);
DUK_DDD(DUK_DDDPRINT("removing hash entry at h_idx %ld", (long) desc.h_idx));
DUK_ASSERT(DUK_HOBJECT_GET_HSIZE(obj) > 0);
DUK_ASSERT((duk_uint32_t) desc.h_idx < DUK_HOBJECT_GET_HSIZE(obj));
h_base[desc.h_idx] = DUK__HASH_DELETED;
} else {
DUK_ASSERT(DUK_HOBJECT_GET_HSIZE(obj) == 0);
}
#else
DUK_ASSERT(DUK_HOBJECT_GET_HSIZE(obj) == 0);
#endif
/* remove value */
DUK_DDD(DUK_DDDPRINT("before removing value, e_idx %ld, key %p, key at slot %p",
(long) desc.e_idx, (void *) key, (void *) DUK_HOBJECT_E_GET_KEY(thr->heap, obj, desc.e_idx)));
DUK_DDD(DUK_DDDPRINT("removing value at e_idx %ld", (long) desc.e_idx));
if (DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, obj, desc.e_idx)) {
duk_hobject *tmp;
tmp = DUK_HOBJECT_E_GET_VALUE_GETTER(thr->heap, obj, desc.e_idx);
DUK_HOBJECT_E_SET_VALUE_GETTER(thr->heap, obj, desc.e_idx, NULL);
DUK_UNREF(tmp);
DUK_HOBJECT_DECREF_ALLOWNULL(thr, tmp); /* side effects */
tmp = DUK_HOBJECT_E_GET_VALUE_SETTER(thr->heap, obj, desc.e_idx);
DUK_HOBJECT_E_SET_VALUE_SETTER(thr->heap, obj, desc.e_idx, NULL);
DUK_UNREF(tmp);
DUK_HOBJECT_DECREF_ALLOWNULL(thr, tmp); /* side effects */
} else {
tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, desc.e_idx);
DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv); /* side effects */
}
#if 0
/* Not strictly necessary because if key == NULL, flag MUST be ignored. */
DUK_HOBJECT_E_SET_FLAGS(thr->heap, obj, desc.e_idx, 0);
#endif
/* remove key */
DUK_DDD(DUK_DDDPRINT("before removing key, e_idx %ld, key %p, key at slot %p",
(long) desc.e_idx, (void *) key, (void *) DUK_HOBJECT_E_GET_KEY(thr->heap, obj, desc.e_idx)));
DUK_DDD(DUK_DDDPRINT("removing key at e_idx %ld", (long) desc.e_idx));
DUK_ASSERT(key == DUK_HOBJECT_E_GET_KEY(thr->heap, obj, desc.e_idx));
DUK_HOBJECT_E_SET_KEY(thr->heap, obj, desc.e_idx, NULL);
DUK_HSTRING_DECREF(thr, key); /* side effects */
goto success;
}
DUK_UNREACHABLE();
success:
/*
* Argument exotic [[Delete]] behavior (E5 Section 10.6) is
* a post-check, keeping arguments internal 'map' in sync with
* any successful deletes (note that property does not need to
* exist for delete to 'succeed').
*
* Delete key from 'map'. Since 'map' only contains array index
* keys, we can use arr_idx for a fast skip.
*/
DUK_DDD(DUK_DDDPRINT("delete successful, check for arguments exotic behavior"));
if (arr_idx != DUK__NO_ARRAY_INDEX && DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj)) {
/* Note: only numbered indices are relevant, so arr_idx fast reject
* is good (this is valid unless there are more than 4**32-1 arguments).
*/
DUK_DDD(DUK_DDDPRINT("delete successful, arguments exotic behavior needed"));
/* Note: we can reuse 'desc' here */
(void) duk__check_arguments_map_for_delete(thr, obj, key, &desc);
}
DUK_DDD(DUK_DDDPRINT("delete successful"));
return 1;
fail_virtual:
DUK_DDD(DUK_DDDPRINT("delete failed: property found, force flag, but virtual"));
if (throw_flag) {
DUK_ERROR_TYPE(thr, DUK_STR_PROPERTY_IS_VIRTUAL);
}
return 0;
fail_not_configurable:
DUK_DDD(DUK_DDDPRINT("delete failed: property found, not configurable"));
if (throw_flag) {
DUK_ERROR_TYPE(thr, DUK_STR_NOT_CONFIGURABLE);
}
return 0;
}
/*
* DELPROP: Ecmascript property deletion.
*/
DUK_INTERNAL duk_bool_t duk_hobject_delprop(duk_hthread *thr, duk_tval *tv_obj, duk_tval *tv_key, duk_bool_t throw_flag) {
duk_context *ctx = (duk_context *) thr;
duk_hstring *key = NULL;
#if defined(DUK_USE_ES6_PROXY)
duk_propdesc desc;
#endif
duk_int_t entry_top;
duk_uint32_t arr_idx = DUK__NO_ARRAY_INDEX;
duk_bool_t rc;
DUK_DDD(DUK_DDDPRINT("delprop: thr=%p, obj=%p, key=%p (obj -> %!T, key -> %!T)",
(void *) thr, (void *) tv_obj, (void *) tv_key,
(duk_tval *) tv_obj, (duk_tval *) tv_key));
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(tv_obj != NULL);
DUK_ASSERT(tv_key != NULL);
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
/* Storing the entry top is cheaper here to ensure stack is correct at exit,
* as there are several paths out.
*/
entry_top = duk_get_top(ctx);
if (DUK_TVAL_IS_UNDEFINED(tv_obj) ||
DUK_TVAL_IS_NULL(tv_obj)) {
DUK_DDD(DUK_DDDPRINT("base object is undefined or null -> reject"));
goto fail_invalid_base_uncond;
}
duk_push_tval(ctx, tv_obj);
duk_push_tval(ctx, tv_key);
tv_obj = DUK_GET_TVAL_NEGIDX(ctx, -2);
if (DUK_TVAL_IS_OBJECT(tv_obj)) {
duk_hobject *obj = DUK_TVAL_GET_OBJECT(tv_obj);
DUK_ASSERT(obj != NULL);
#if defined(DUK_USE_ES6_PROXY)
if (DUK_UNLIKELY(DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(obj))) {
duk_hobject *h_target;
duk_bool_t tmp_bool;
/* Note: proxy handling must happen before key is string coerced. */
if (duk__proxy_check_prop(thr, obj, DUK_STRIDX_DELETE_PROPERTY, tv_key, &h_target)) {
/* -> [ ... trap handler ] */
DUK_DDD(DUK_DDDPRINT("-> proxy object 'deleteProperty' for key %!T", (duk_tval *) tv_key));
duk_push_hobject(ctx, h_target); /* target */
duk_push_tval(ctx, tv_key); /* P */
duk_call_method(ctx, 2 /*nargs*/);
tmp_bool = duk_to_boolean(ctx, -1);
duk_pop(ctx);
if (!tmp_bool) {
goto fail_proxy_rejected; /* retval indicates delete failed */
}
/* Target object must be checked for a conflicting
* non-configurable property.
*/
arr_idx = duk__push_tval_to_hstring_arr_idx(ctx, tv_key, &key);
DUK_ASSERT(key != NULL);
if (duk__get_own_propdesc_raw(thr, h_target, key, arr_idx, &desc, 0 /*flags*/)) { /* don't push value */
int desc_reject;
DUK_DDD(DUK_DDDPRINT("proxy 'deleteProperty': target has matching property %!O, check for "
"conflicting property; desc.flags=0x%08lx, "
"desc.get=%p, desc.set=%p",
(duk_heaphdr *) key, (unsigned long) desc.flags,
(void *) desc.get, (void *) desc.set));
desc_reject = !(desc.flags & DUK_PROPDESC_FLAG_CONFIGURABLE);
if (desc_reject) {
/* unconditional */
DUK_ERROR_TYPE(thr, DUK_STR_PROXY_REJECTED);
}
}
rc = 1; /* success */
goto done_rc;
}
obj = h_target; /* resume delete to target */
}
#endif /* DUK_USE_ES6_PROXY */
duk_to_string(ctx, -1);
key = duk_get_hstring(ctx, -1);
DUK_ASSERT(key != NULL);
rc = duk_hobject_delprop_raw(thr, obj, key, throw_flag ? DUK_DELPROP_FLAG_THROW : 0);
goto done_rc;
} else if (DUK_TVAL_IS_STRING(tv_obj)) {
/* XXX: unnecessary string coercion for array indices,
* intentional to keep small.
*/
duk_hstring *h = DUK_TVAL_GET_STRING(tv_obj);
DUK_ASSERT(h != NULL);
duk_to_string(ctx, -1);
key = duk_get_hstring(ctx, -1);
DUK_ASSERT(key != NULL);
if (key == DUK_HTHREAD_STRING_LENGTH(thr)) {
goto fail_not_configurable;
}
arr_idx = DUK_HSTRING_GET_ARRIDX_FAST(key);
if (arr_idx != DUK__NO_ARRAY_INDEX &&
arr_idx < DUK_HSTRING_GET_CHARLEN(h)) {
goto fail_not_configurable;
}
} else if (DUK_TVAL_IS_BUFFER(tv_obj)) {
/* XXX: unnecessary string coercion for array indices,
* intentional to keep small; some overlap with string
* handling.
*/
duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv_obj);
DUK_ASSERT(h != NULL);
duk_to_string(ctx, -1);
key = duk_get_hstring(ctx, -1);
DUK_ASSERT(key != NULL);
if (key == DUK_HTHREAD_STRING_LENGTH(thr)) {
goto fail_not_configurable;
}
arr_idx = DUK_HSTRING_GET_ARRIDX_FAST(key);
if (arr_idx != DUK__NO_ARRAY_INDEX &&
arr_idx < DUK_HBUFFER_GET_SIZE(h)) {
goto fail_not_configurable;
}
} else if (DUK_TVAL_IS_LIGHTFUNC(tv_obj)) {
/* Lightfunc virtual properties are non-configurable, so
* reject if match any of them.
*/
duk_to_string(ctx, -1);
key = duk_get_hstring(ctx, -1);
DUK_ASSERT(key != NULL);
if (duk__key_is_lightfunc_ownprop(thr, key)) {
goto fail_not_configurable;
}
}
/* non-object base, no offending virtual property */
rc = 1;
goto done_rc;
done_rc:
duk_set_top(ctx, entry_top);
return rc;
fail_invalid_base_uncond:
/* Note: unconditional throw */
DUK_ASSERT(duk_get_top(ctx) == entry_top);
#if defined(DUK_USE_PARANOID_ERRORS)
DUK_ERROR_TYPE(thr, DUK_STR_INVALID_BASE);
#else
DUK_ERROR_FMT2(thr, DUK_ERR_TYPE_ERROR, "cannot delete property %s of %s",
duk_push_string_tval_readable(ctx, tv_key), duk_push_string_tval_readable(ctx, tv_obj));
#endif
return 0;
#if defined(DUK_USE_ES6_PROXY)
fail_proxy_rejected:
if (throw_flag) {
DUK_ERROR_TYPE(thr, DUK_STR_PROXY_REJECTED);
}
duk_set_top(ctx, entry_top);
return 0;
#endif
fail_not_configurable:
if (throw_flag) {
DUK_ERROR_TYPE(thr, DUK_STR_NOT_CONFIGURABLE);
}
duk_set_top(ctx, entry_top);
return 0;
}
/*
* Internal helper to define a property with specific flags, ignoring
* normal semantics such as extensibility, write protection etc.
* Overwrites any existing value and attributes unless caller requests
* that value only be updated if it doesn't already exists.
*
* Does not support:
* - virtual properties (error if write attempted)
* - getter/setter properties (error if write attempted)
* - non-default (!= WEC) attributes for array entries (error if attempted)
* - array abandoning: if array part exists, it is always extended
* - array 'length' updating
*
* Stack: [... in_val] -> []
*
* Used for e.g. built-in initialization and environment record
* operations.
*/
DUK_INTERNAL void duk_hobject_define_property_internal(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_small_uint_t flags) {
duk_context *ctx = (duk_context *) thr;
duk_propdesc desc;
duk_uint32_t arr_idx;
duk_int_t e_idx;
duk_tval *tv1 = NULL;
duk_tval *tv2 = NULL;
duk_small_uint_t propflags = flags & DUK_PROPDESC_FLAGS_MASK; /* mask out flags not actually stored */
DUK_DDD(DUK_DDDPRINT("define new property (internal): thr=%p, obj=%!O, key=%!O, flags=0x%02lx, val=%!T",
(void *) thr, (duk_heaphdr *) obj, (duk_heaphdr *) key,
(unsigned long) flags, (duk_tval *) duk_get_tval(ctx, -1)));
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT(key != NULL);
DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj));
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
DUK_ASSERT(duk_is_valid_index(ctx, -1)); /* contains value */
arr_idx = DUK_HSTRING_GET_ARRIDX_SLOW(key);
if (duk__get_own_propdesc_raw(thr, obj, key, arr_idx, &desc, 0 /*flags*/)) { /* don't push value */
if (desc.e_idx >= 0) {
if (flags & DUK_PROPDESC_FLAG_NO_OVERWRITE) {
DUK_DDD(DUK_DDDPRINT("property already exists in the entry part -> skip as requested"));
goto pop_exit;
}
DUK_DDD(DUK_DDDPRINT("property already exists in the entry part -> update value and attributes"));
if (DUK_UNLIKELY(DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, obj, desc.e_idx))) {
DUK_D(DUK_DPRINT("existing property is an accessor, not supported"));
goto error_internal;
}
DUK_HOBJECT_E_SET_FLAGS(thr->heap, obj, desc.e_idx, propflags);
tv1 = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, desc.e_idx);
} else if (desc.a_idx >= 0) {
if (flags & DUK_PROPDESC_FLAG_NO_OVERWRITE) {
DUK_DDD(DUK_DDDPRINT("property already exists in the array part -> skip as requested"));
goto pop_exit;
}
DUK_DDD(DUK_DDDPRINT("property already exists in the array part -> update value (assert attributes)"));
if (propflags != DUK_PROPDESC_FLAGS_WEC) {
DUK_D(DUK_DPRINT("existing property in array part, but propflags not WEC (0x%02lx)",
(unsigned long) propflags));
goto error_internal;
}
tv1 = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, desc.a_idx);
} else {
if (flags & DUK_PROPDESC_FLAG_NO_OVERWRITE) {
DUK_DDD(DUK_DDDPRINT("property already exists but is virtual -> skip as requested"));
goto pop_exit;
}
DUK_DDD(DUK_DDDPRINT("property already exists but is virtual -> failure"));
goto error_virtual;
}
goto write_value;
}
if (DUK_HOBJECT_HAS_ARRAY_PART(obj)) {
if (arr_idx != DUK__NO_ARRAY_INDEX) {
DUK_DDD(DUK_DDDPRINT("property does not exist, object has array part -> possibly extend array part and write value (assert attributes)"));
DUK_ASSERT(propflags == DUK_PROPDESC_FLAGS_WEC);
/* always grow the array, no sparse / abandon support here */
if (arr_idx >= DUK_HOBJECT_GET_ASIZE(obj)) {
duk__grow_props_for_array_item(thr, obj, arr_idx);
}
DUK_ASSERT(arr_idx < DUK_HOBJECT_GET_ASIZE(obj));
tv1 = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, arr_idx);
goto write_value;
}
}
DUK_DDD(DUK_DDDPRINT("property does not exist, object belongs in entry part -> allocate new entry and write value and attributes"));
e_idx = duk__alloc_entry_checked(thr, obj, key); /* increases key refcount */
DUK_ASSERT(e_idx >= 0);
DUK_HOBJECT_E_SET_FLAGS(thr->heap, obj, e_idx, propflags);
tv1 = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, e_idx);
/* new entry: previous value is garbage; set to undefined to share write_value */
DUK_TVAL_SET_UNDEFINED(tv1);
goto write_value;
write_value:
/* tv1 points to value storage */
tv2 = duk_require_tval(ctx, -1); /* late lookup, avoid side effects */
DUK_DDD(DUK_DDDPRINT("writing/updating value: %!T -> %!T",
(duk_tval *) tv1, (duk_tval *) tv2));
DUK_TVAL_SET_TVAL_UPDREF(thr, tv1, tv2); /* side effects */
goto pop_exit;
pop_exit:
duk_pop(ctx); /* remove in_val */
return;
error_internal:
DUK_ERROR_INTERNAL_DEFMSG(thr);
return;
error_virtual:
DUK_ERROR_TYPE(thr, DUK_STR_REDEFINE_VIRT_PROP);
return;
}
/*
* Fast path for defining array indexed values without interning the key.
* This is used by e.g. code for Array prototype and traceback creation so
* must avoid interning.
*/
DUK_INTERNAL void duk_hobject_define_property_internal_arridx(duk_hthread *thr, duk_hobject *obj, duk_uarridx_t arr_idx, duk_small_uint_t flags) {
duk_context *ctx = (duk_context *) thr;
duk_hstring *key;
duk_tval *tv1, *tv2;
DUK_DDD(DUK_DDDPRINT("define new property (internal) arr_idx fast path: thr=%p, obj=%!O, "
"arr_idx=%ld, flags=0x%02lx, val=%!T",
(void *) thr, obj, (long) arr_idx, (unsigned long) flags,
(duk_tval *) duk_get_tval(ctx, -1)));
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj));
if (DUK_HOBJECT_HAS_ARRAY_PART(obj) &&
arr_idx != DUK__NO_ARRAY_INDEX &&
flags == DUK_PROPDESC_FLAGS_WEC) {
DUK_ASSERT((flags & DUK_PROPDESC_FLAG_NO_OVERWRITE) == 0); /* covered by comparison */
DUK_DDD(DUK_DDDPRINT("define property to array part (property may or may not exist yet)"));
/* always grow the array, no sparse / abandon support here */
if (arr_idx >= DUK_HOBJECT_GET_ASIZE(obj)) {
duk__grow_props_for_array_item(thr, obj, arr_idx);
}
DUK_ASSERT(arr_idx < DUK_HOBJECT_GET_ASIZE(obj));
tv1 = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, arr_idx);
tv2 = duk_require_tval(ctx, -1);
DUK_TVAL_SET_TVAL_UPDREF(thr, tv1, tv2); /* side effects */
duk_pop(ctx); /* [ ...val ] -> [ ... ] */
return;
}
DUK_DDD(DUK_DDDPRINT("define property fast path didn't work, use slow path"));
duk_push_uint(ctx, (duk_uint_t) arr_idx);
key = duk_to_hstring(ctx, -1);
DUK_ASSERT(key != NULL);
duk_insert(ctx, -2); /* [ ... val key ] -> [ ... key val ] */
duk_hobject_define_property_internal(thr, obj, key, flags);
duk_pop(ctx); /* [ ... key ] -> [ ... ] */
}
/*
* Internal helper for defining an accessor property, ignoring
* normal semantics such as extensibility, write protection etc.
* Overwrites any existing value and attributes. This is called
* very rarely, so the implementation first sets a value to undefined
* and then changes the entry to an accessor (this is to save code space).
*/
DUK_INTERNAL void duk_hobject_define_accessor_internal(duk_hthread *thr, duk_hobject *obj, duk_hstring *key, duk_hobject *getter, duk_hobject *setter, duk_small_uint_t propflags) {
duk_context *ctx = (duk_context *) thr;
duk_int_t e_idx;
duk_int_t h_idx;
DUK_DDD(DUK_DDDPRINT("define new accessor (internal): thr=%p, obj=%!O, key=%!O, "
"getter=%!O, setter=%!O, flags=0x%02lx",
(void *) thr, (duk_heaphdr *) obj, (duk_heaphdr *) key,
(duk_heaphdr *) getter, (duk_heaphdr *) setter,
(unsigned long) propflags));
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT(key != NULL);
DUK_ASSERT((propflags & ~DUK_PROPDESC_FLAGS_MASK) == 0);
/* setter and/or getter may be NULL */
DUK_ASSERT(!DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj));
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
/* force the property to 'undefined' to create a slot for it */
duk_push_undefined(ctx);
duk_hobject_define_property_internal(thr, obj, key, propflags);
duk_hobject_find_existing_entry(thr->heap, obj, key, &e_idx, &h_idx);
DUK_DDD(DUK_DDDPRINT("accessor slot: e_idx=%ld, h_idx=%ld", (long) e_idx, (long) h_idx));
DUK_ASSERT(e_idx >= 0);
DUK_ASSERT((duk_uint32_t) e_idx < DUK_HOBJECT_GET_ENEXT(obj));
/* no need to decref, as previous value is 'undefined' */
DUK_HOBJECT_E_SLOT_SET_ACCESSOR(thr->heap, obj, e_idx);
DUK_HOBJECT_E_SET_VALUE_GETTER(thr->heap, obj, e_idx, getter);
DUK_HOBJECT_E_SET_VALUE_SETTER(thr->heap, obj, e_idx, setter);
DUK_HOBJECT_INCREF_ALLOWNULL(thr, getter);
DUK_HOBJECT_INCREF_ALLOWNULL(thr, setter);
}
/*
* Internal helpers for managing object 'length'
*/
/* XXX: awkward helpers */
DUK_INTERNAL void duk_hobject_set_length(duk_hthread *thr, duk_hobject *obj, duk_uint32_t length) {
duk_context *ctx = (duk_context *) thr;
duk_push_hobject(ctx, obj);
duk_push_hstring_stridx(ctx, DUK_STRIDX_LENGTH);
duk_push_u32(ctx, length);
(void) duk_hobject_putprop(thr,
DUK_GET_TVAL_NEGIDX(ctx, -3),
DUK_GET_TVAL_NEGIDX(ctx, -2),
DUK_GET_TVAL_NEGIDX(ctx, -1),
0);
duk_pop_n(ctx, 3);
}
DUK_INTERNAL void duk_hobject_set_length_zero(duk_hthread *thr, duk_hobject *obj) {
duk_hobject_set_length(thr, obj, 0);
}
DUK_INTERNAL duk_uint32_t duk_hobject_get_length(duk_hthread *thr, duk_hobject *obj) {
duk_context *ctx = (duk_context *) thr;
duk_double_t val;
duk_push_hobject(ctx, obj);
duk_push_hstring_stridx(ctx, DUK_STRIDX_LENGTH);
(void) duk_hobject_getprop(thr,
DUK_GET_TVAL_NEGIDX(ctx, -2),
DUK_GET_TVAL_NEGIDX(ctx, -1));
val = duk_to_number(ctx, -1);
duk_pop_n(ctx, 3);
if (val >= 0.0 && val < DUK_DOUBLE_2TO32) {
return (duk_uint32_t) val;
}
return 0;
}
/*
* Object.getOwnPropertyDescriptor() (E5 Sections 15.2.3.3, 8.10.4)
*
* This is an actual function call.
*/
DUK_INTERNAL duk_ret_t duk_hobject_object_get_own_property_descriptor(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *obj;
duk_hstring *key;
duk_propdesc pd;
duk_bool_t rc;
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
obj = duk_require_hobject_or_lfunc_coerce(ctx, 0);
(void) duk_to_string(ctx, 1);
key = duk_require_hstring(ctx, 1);
DUK_ASSERT(obj != NULL);
DUK_ASSERT(key != NULL);
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
rc = duk_hobject_get_own_propdesc(thr, obj, key, &pd, DUK_GETDESC_FLAG_PUSH_VALUE);
if (!rc) {
duk_push_undefined(ctx);
/* [obj key undefined] */
return 1;
}
duk_push_object(ctx);
/* [obj key value desc] */
if (DUK_PROPDESC_IS_ACCESSOR(&pd)) {
/* If a setter/getter is missing (undefined), the descriptor must
* still have the property present with the value 'undefined'.
*/
if (pd.get) {
duk_push_hobject(ctx, pd.get);
} else {
duk_push_undefined(ctx);
}
duk_put_prop_stridx(ctx, -2, DUK_STRIDX_GET);
if (pd.set) {
duk_push_hobject(ctx, pd.set);
} else {
duk_push_undefined(ctx);
}
duk_put_prop_stridx(ctx, -2, DUK_STRIDX_SET);
} else {
duk_dup(ctx, -2); /* [obj key value desc value] */
duk_put_prop_stridx(ctx, -2, DUK_STRIDX_VALUE);
duk_push_boolean(ctx, DUK_PROPDESC_IS_WRITABLE(&pd));
duk_put_prop_stridx(ctx, -2, DUK_STRIDX_WRITABLE);
/* [obj key value desc] */
}
duk_push_boolean(ctx, DUK_PROPDESC_IS_ENUMERABLE(&pd));
duk_put_prop_stridx(ctx, -2, DUK_STRIDX_ENUMERABLE);
duk_push_boolean(ctx, DUK_PROPDESC_IS_CONFIGURABLE(&pd));
duk_put_prop_stridx(ctx, -2, DUK_STRIDX_CONFIGURABLE);
/* [obj key value desc] */
return 1;
}
/*
* NormalizePropertyDescriptor() related helper.
*
* Internal helper which validates and normalizes a property descriptor
* represented as an Ecmascript object (e.g. argument to defineProperty()).
* The output of this conversion is a set of defprop_flags and possibly
* some values pushed on the value stack; some subset of: property value,
* getter, setter. Caller must manage stack top carefully because the
* number of values pushed depends on the input property descriptor.
*
* The original descriptor object must not be altered in the process.
*/
/* XXX: very basic optimization -> duk_get_prop_stridx_top */
DUK_INTERNAL
void duk_hobject_prepare_property_descriptor(duk_context *ctx,
duk_idx_t idx_in,
duk_uint_t *out_defprop_flags,
duk_idx_t *out_idx_value,
duk_hobject **out_getter,
duk_hobject **out_setter) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_idx_t idx_value = -1;
duk_hobject *getter = NULL;
duk_hobject *setter = NULL;
duk_bool_t is_data_desc = 0;
duk_bool_t is_acc_desc = 0;
duk_uint_t defprop_flags = 0;
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(out_defprop_flags != NULL);
DUK_ASSERT(out_idx_value != NULL);
DUK_ASSERT(out_getter != NULL);
DUK_ASSERT(out_setter != NULL);
/* Must be an object, otherwise TypeError (E5.1 Section 8.10.5, step 1). */
idx_in = duk_require_normalize_index(ctx, idx_in);
(void) duk_require_hobject(ctx, idx_in);
/* The coercion order must match the ToPropertyDescriptor() algorithm
* so that side effects in coercion happen in the correct order.
* (This order also happens to be compatible with duk_def_prop(),
* although it doesn't matter in practice.)
*/
if (duk_get_prop_stridx(ctx, idx_in, DUK_STRIDX_VALUE)) {
is_data_desc = 1;
defprop_flags |= DUK_DEFPROP_HAVE_VALUE;
idx_value = duk_get_top_index(ctx);
/* Leave 'value' on stack */
} else {
duk_pop(ctx);
}
if (duk_get_prop_stridx(ctx, idx_in, DUK_STRIDX_WRITABLE)) {
is_data_desc = 1;
if (duk_to_boolean(ctx, -1)) {
defprop_flags |= DUK_DEFPROP_HAVE_WRITABLE | DUK_DEFPROP_WRITABLE;
} else {
defprop_flags |= DUK_DEFPROP_HAVE_WRITABLE;
}
}
duk_pop(ctx);
if (duk_get_prop_stridx(ctx, idx_in, DUK_STRIDX_GET)) {
duk_tval *tv = duk_require_tval(ctx, -1);
duk_hobject *h_get;
if (DUK_TVAL_IS_UNDEFINED(tv)) {
/* undefined is accepted */
DUK_ASSERT(getter == NULL);
} else {
/* NOTE: lightfuncs are coerced to full functions because
* lightfuncs don't fit into a property value slot. This
* has some side effects, see test-dev-lightfunc-accessor.js.
*/
h_get = duk_get_hobject_or_lfunc_coerce(ctx, -1);
if (h_get == NULL || !DUK_HOBJECT_IS_CALLABLE(h_get)) {
goto type_error;
}
getter = h_get;
}
is_acc_desc = 1;
defprop_flags |= DUK_DEFPROP_HAVE_GETTER;
/* Leave 'getter' on stack */
} else {
duk_pop(ctx);
}
if (duk_get_prop_stridx(ctx, idx_in, DUK_STRIDX_SET)) {
duk_tval *tv = duk_require_tval(ctx, -1);
duk_hobject *h_set;
if (DUK_TVAL_IS_UNDEFINED(tv)) {
/* undefined is accepted */
DUK_ASSERT(setter == NULL);
} else {
/* NOTE: lightfuncs are coerced to full functions because
* lightfuncs don't fit into a property value slot. This
* has some side effects, see test-dev-lightfunc-accessor.js.
*/
h_set = duk_get_hobject_or_lfunc_coerce(ctx, -1);
if (h_set == NULL || !DUK_HOBJECT_IS_CALLABLE(h_set)) {
goto type_error;
}
setter = h_set;
}
is_acc_desc = 1;
defprop_flags |= DUK_DEFPROP_HAVE_SETTER;
/* Leave 'setter' on stack */
} else {
duk_pop(ctx);
}
if (duk_get_prop_stridx(ctx, idx_in, DUK_STRIDX_ENUMERABLE)) {
if (duk_to_boolean(ctx, -1)) {
defprop_flags |= DUK_DEFPROP_HAVE_ENUMERABLE | DUK_DEFPROP_ENUMERABLE;
} else {
defprop_flags |= DUK_DEFPROP_HAVE_ENUMERABLE;
}
}
duk_pop(ctx);
if (duk_get_prop_stridx(ctx, idx_in, DUK_STRIDX_CONFIGURABLE)) {
if (duk_to_boolean(ctx, -1)) {
defprop_flags |= DUK_DEFPROP_HAVE_CONFIGURABLE | DUK_DEFPROP_CONFIGURABLE;
} else {
defprop_flags |= DUK_DEFPROP_HAVE_CONFIGURABLE;
}
}
duk_pop(ctx);
if (is_data_desc && is_acc_desc) {
goto type_error;
}
*out_defprop_flags = defprop_flags;
*out_idx_value = idx_value;
*out_getter = getter;
*out_setter = setter;
/* [ ... value? getter? setter? ] */
return;
type_error:
DUK_ERROR_TYPE(thr, DUK_STR_INVALID_DESCRIPTOR);
}
/*
* Object.defineProperty() related helper (E5 Section 15.2.3.6)
*
* Inlines all [[DefineOwnProperty]] exotic behaviors.
*
* Note: Ecmascript compliant [[DefineOwnProperty]](P, Desc, Throw) is not
* implemented directly, but Object.defineProperty() serves its purpose.
* We don't need the [[DefineOwnProperty]] internally and we don't have a
* property descriptor with 'missing values' so it's easier to avoid it
* entirely.
*
* Note: this is only called for actual objects, not primitive values.
* This must support virtual properties for full objects (e.g. Strings)
* but not for plain values (e.g. strings). Lightfuncs, even though
* primitive in a sense, are treated like objects and accepted as target
* values.
*/
/* XXX: this is a major target for size optimization */
DUK_INTERNAL
void duk_hobject_define_property_helper(duk_context *ctx,
duk_uint_t defprop_flags,
duk_hobject *obj,
duk_hstring *key,
duk_idx_t idx_value,
duk_hobject *get,
duk_hobject *set) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_uint32_t arr_idx;
duk_tval tv;
duk_bool_t has_enumerable;
duk_bool_t has_configurable;
duk_bool_t has_writable;
duk_bool_t has_value;
duk_bool_t has_get;
duk_bool_t has_set;
duk_bool_t is_enumerable;
duk_bool_t is_configurable;
duk_bool_t is_writable;
duk_bool_t throw_flag;
duk_bool_t force_flag;
duk_small_uint_t new_flags;
duk_propdesc curr;
duk_uint32_t arridx_new_array_length; /* != 0 => post-update for array 'length' (used when key is an array index) */
duk_uint32_t arrlen_old_len;
duk_uint32_t arrlen_new_len;
duk_bool_t pending_write_protect;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT(key != NULL);
/* idx_value may be < 0 (no value), set and get may be NULL */
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
/* All the flags fit in 16 bits, so will fit into duk_bool_t. */
has_writable = (defprop_flags & DUK_DEFPROP_HAVE_WRITABLE);
has_enumerable = (defprop_flags & DUK_DEFPROP_HAVE_ENUMERABLE);
has_configurable = (defprop_flags & DUK_DEFPROP_HAVE_CONFIGURABLE);
has_value = (defprop_flags & DUK_DEFPROP_HAVE_VALUE);
has_get = (defprop_flags & DUK_DEFPROP_HAVE_GETTER);
has_set = (defprop_flags & DUK_DEFPROP_HAVE_SETTER);
is_writable = (defprop_flags & DUK_DEFPROP_WRITABLE);
is_enumerable = (defprop_flags & DUK_DEFPROP_ENUMERABLE);
is_configurable = (defprop_flags & DUK_DEFPROP_CONFIGURABLE);
throw_flag = 1; /* Object.defineProperty() calls [[DefineOwnProperty]] with Throw=true */
force_flag = (defprop_flags & DUK_DEFPROP_FORCE);
arr_idx = DUK_HSTRING_GET_ARRIDX_SLOW(key);
arridx_new_array_length = 0;
pending_write_protect = 0;
arrlen_old_len = 0;
arrlen_new_len = 0;
DUK_DDD(DUK_DDDPRINT("has_enumerable=%ld is_enumerable=%ld "
"has_configurable=%ld is_configurable=%ld "
"has_writable=%ld is_writable=%ld "
"has_value=%ld value=%!T "
"has_get=%ld get=%p=%!O "
"has_set=%ld set=%p=%!O "
"arr_idx=%ld",
(long) has_enumerable, (long) is_enumerable,
(long) has_configurable, (long) is_configurable,
(long) has_writable, (long) is_writable,
(long) has_value, (duk_tval *) (idx_value >= 0 ? duk_get_tval(ctx, idx_value) : NULL),
(long) has_get, (void *) get, (duk_heaphdr *) get,
(long) has_set, (void *) set, (duk_heaphdr *) set,
(long) arr_idx));
/*
* Array exotic behaviors can be implemented at this point. The local variables
* are essentially a 'value copy' of the input descriptor (Desc), which is modified
* by the Array [[DefineOwnProperty]] (E5 Section 15.4.5.1).
*/
if (!DUK_HOBJECT_HAS_EXOTIC_ARRAY(obj)) {
goto skip_array_exotic;
}
if (key == DUK_HTHREAD_STRING_LENGTH(thr)) {
/* E5 Section 15.4.5.1, step 3, steps a - i are implemented here, j - n at the end */
if (!has_value) {
DUK_DDD(DUK_DDDPRINT("exotic array behavior for 'length', but no value in descriptor -> normal behavior"));
goto skip_array_exotic;
}
DUK_DDD(DUK_DDDPRINT("exotic array behavior for 'length', value present in descriptor -> exotic behavior"));
/*
* Get old and new length
*/
/* Note: reuse 'curr' as a temp propdesc */
arrlen_old_len = duk__get_old_array_length(thr, obj, &curr);
duk_dup(ctx, idx_value);
arrlen_new_len = duk__to_new_array_length_checked(thr);
duk_push_u32(ctx, arrlen_new_len);
duk_replace(ctx, idx_value); /* step 3.e: replace 'Desc.[[Value]]' */
DUK_DDD(DUK_DDDPRINT("old_len=%ld, new_len=%ld", (long) arrlen_old_len, (long) arrlen_new_len));
if (arrlen_new_len >= arrlen_old_len) {
/* standard behavior, step 3.f.i */
DUK_DDD(DUK_DDDPRINT("new length is same or higher as previous => standard behavior"));
goto skip_array_exotic;
}
DUK_DDD(DUK_DDDPRINT("new length is smaller than previous => exotic post behavior"));
/* XXX: consolidated algorithm step 15.f -> redundant? */
if (!(curr.flags & DUK_PROPDESC_FLAG_WRITABLE) && !force_flag) {
/* Note: 'curr' refers to 'length' propdesc */
goto fail_not_writable_array_length;
}
/* steps 3.h and 3.i */
if (has_writable && !is_writable) {
DUK_DDD(DUK_DDDPRINT("desc writable is false, force it back to true, and flag pending write protect"));
is_writable = 1;
pending_write_protect = 1;
}
/* remaining actual steps are carried out if standard DefineOwnProperty succeeds */
} else if (arr_idx != DUK__NO_ARRAY_INDEX) {
/* XXX: any chance of unifying this with the 'length' key handling? */
/* E5 Section 15.4.5.1, step 4 */
duk_uint32_t old_len;
/* Note: use 'curr' as a temp propdesc */
old_len = duk__get_old_array_length(thr, obj, &curr);
if (arr_idx >= old_len) {
DUK_DDD(DUK_DDDPRINT("defineProperty requires array length update "
"(arr_idx=%ld, old_len=%ld)",
(long) arr_idx, (long) old_len));
if (!(curr.flags & DUK_PROPDESC_FLAG_WRITABLE)) {
/* Note: 'curr' refers to 'length' propdesc */
goto fail_not_writable_array_length;
}
/* actual update happens once write has been completed without
* error below.
*/
DUK_ASSERT(arr_idx != 0xffffffffUL);
arridx_new_array_length = arr_idx + 1;
} else {
DUK_DDD(DUK_DDDPRINT("defineProperty does not require length update "
"(arr_idx=%ld, old_len=%ld) -> standard behavior",
(long) arr_idx, (long) old_len));
}
}
skip_array_exotic:
/* XXX: There is currently no support for writing buffer object
* indexed elements here. Attempt to do so will succeed and
* write a concrete property into the buffer object. This should
* be fixed at some point but because buffers are a custom feature
* anyway, this is relatively unimportant.
*/
/*
* Actual Object.defineProperty() default algorithm.
*/
/*
* First check whether property exists; if not, simple case. This covers
* steps 1-4.
*/
if (!duk__get_own_propdesc_raw(thr, obj, key, arr_idx, &curr, DUK_GETDESC_FLAG_PUSH_VALUE)) {
DUK_DDD(DUK_DDDPRINT("property does not exist"));
if (!DUK_HOBJECT_HAS_EXTENSIBLE(obj) && !force_flag) {
goto fail_not_extensible;
}
/* XXX: share final setting code for value and flags? difficult because
* refcount code is different. Share entry allocation? But can't allocate
* until array index checked.
*/
/* steps 4.a and 4.b are tricky */
if (has_set || has_get) {
duk_int_t e_idx;
DUK_DDD(DUK_DDDPRINT("create new accessor property"));
DUK_ASSERT(has_set || set == NULL);
DUK_ASSERT(has_get || get == NULL);
DUK_ASSERT(!has_value);
DUK_ASSERT(!has_writable);
new_flags = DUK_PROPDESC_FLAG_ACCESSOR; /* defaults, E5 Section 8.6.1, Table 7 */
if (has_enumerable && is_enumerable) {
new_flags |= DUK_PROPDESC_FLAG_ENUMERABLE;
}
if (has_configurable && is_configurable) {
new_flags |= DUK_PROPDESC_FLAG_CONFIGURABLE;
}
if (arr_idx != DUK__NO_ARRAY_INDEX && DUK_HOBJECT_HAS_ARRAY_PART(obj)) {
DUK_DDD(DUK_DDDPRINT("accessor cannot go to array part, abandon array"));
duk__abandon_array_checked(thr, obj);
}
/* write to entry part */
e_idx = duk__alloc_entry_checked(thr, obj, key);
DUK_ASSERT(e_idx >= 0);
DUK_HOBJECT_E_SET_VALUE_GETTER(thr->heap, obj, e_idx, get);
DUK_HOBJECT_E_SET_VALUE_SETTER(thr->heap, obj, e_idx, set);
DUK_HOBJECT_INCREF_ALLOWNULL(thr, get);
DUK_HOBJECT_INCREF_ALLOWNULL(thr, set);
DUK_HOBJECT_E_SET_FLAGS(thr->heap, obj, e_idx, new_flags);
goto success_exotics;
} else {
duk_int_t e_idx;
duk_tval *tv2;
DUK_DDD(DUK_DDDPRINT("create new data property"));
DUK_ASSERT(!has_set);
DUK_ASSERT(!has_get);
new_flags = 0; /* defaults, E5 Section 8.6.1, Table 7 */
if (has_writable && is_writable) {
new_flags |= DUK_PROPDESC_FLAG_WRITABLE;
}
if (has_enumerable && is_enumerable) {
new_flags |= DUK_PROPDESC_FLAG_ENUMERABLE;
}
if (has_configurable && is_configurable) {
new_flags |= DUK_PROPDESC_FLAG_CONFIGURABLE;
}
if (has_value) {
duk_tval *tv_tmp = duk_require_tval(ctx, idx_value);
DUK_TVAL_SET_TVAL(&tv, tv_tmp);
} else {
DUK_TVAL_SET_UNDEFINED(&tv); /* default value */
}
if (arr_idx != DUK__NO_ARRAY_INDEX && DUK_HOBJECT_HAS_ARRAY_PART(obj)) {
if (new_flags == DUK_PROPDESC_FLAGS_WEC) {
#if 0
DUK_DDD(DUK_DDDPRINT("new data property attributes match array defaults, attempt to write to array part"));
/* may become sparse...*/
#endif
/* XXX: handling for array part missing now; this doesn't affect
* compliance but causes array entry writes using defineProperty()
* to always abandon array part.
*/
}
DUK_DDD(DUK_DDDPRINT("new data property cannot go to array part, abandon array"));
duk__abandon_array_checked(thr, obj);
/* fall through */
}
/* write to entry part */
e_idx = duk__alloc_entry_checked(thr, obj, key);
DUK_ASSERT(e_idx >= 0);
tv2 = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, e_idx);
DUK_TVAL_SET_TVAL(tv2, &tv);
DUK_TVAL_INCREF(thr, tv2);
DUK_HOBJECT_E_SET_FLAGS(thr->heap, obj, e_idx, new_flags);
goto success_exotics;
}
DUK_UNREACHABLE();
}
/* we currently assume virtual properties are not configurable (as none of them are) */
DUK_ASSERT((curr.e_idx >= 0 || curr.a_idx >= 0) || !(curr.flags & DUK_PROPDESC_FLAG_CONFIGURABLE));
/* [obj key desc value get set curr_value] */
/*
* Property already exists. Steps 5-6 detect whether any changes need
* to be made.
*/
if (has_enumerable) {
if (is_enumerable) {
if (!(curr.flags & DUK_PROPDESC_FLAG_ENUMERABLE)) {
goto need_check;
}
} else {
if (curr.flags & DUK_PROPDESC_FLAG_ENUMERABLE) {
goto need_check;
}
}
}
if (has_configurable) {
if (is_configurable) {
if (!(curr.flags & DUK_PROPDESC_FLAG_CONFIGURABLE)) {
goto need_check;
}
} else {
if (curr.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) {
goto need_check;
}
}
}
if (has_value) {
duk_tval *tmp1;
duk_tval *tmp2;
/* attempt to change from accessor to data property */
if (curr.flags & DUK_PROPDESC_FLAG_ACCESSOR) {
goto need_check;
}
tmp1 = duk_require_tval(ctx, -1); /* curr value */
tmp2 = duk_require_tval(ctx, idx_value); /* new value */
if (!duk_js_samevalue(tmp1, tmp2)) {
goto need_check;
}
}
if (has_writable) {
/* attempt to change from accessor to data property */
if (curr.flags & DUK_PROPDESC_FLAG_ACCESSOR) {
goto need_check;
}
if (is_writable) {
if (!(curr.flags & DUK_PROPDESC_FLAG_WRITABLE)) {
goto need_check;
}
} else {
if (curr.flags & DUK_PROPDESC_FLAG_WRITABLE) {
goto need_check;
}
}
}
if (has_set) {
if (curr.flags & DUK_PROPDESC_FLAG_ACCESSOR) {
if (set != curr.set) {
goto need_check;
}
} else {
goto need_check;
}
}
if (has_get) {
if (curr.flags & DUK_PROPDESC_FLAG_ACCESSOR) {
if (get != curr.get) {
goto need_check;
}
} else {
goto need_check;
}
}
/* property exists, either 'desc' is empty, or all values
* match (SameValue)
*/
goto success_no_exotics;
need_check:
/*
* Some change(s) need to be made. Steps 7-11.
*/
/* shared checks for all descriptor types */
if (!(curr.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) && !force_flag) {
if (has_configurable && is_configurable) {
goto fail_not_configurable;
}
if (has_enumerable) {
if (curr.flags & DUK_PROPDESC_FLAG_ENUMERABLE) {
if (!is_enumerable) {
goto fail_not_configurable;
}
} else {
if (is_enumerable) {
goto fail_not_configurable;
}
}
}
}
/* Reject attempt to change virtual properties: not part of the
* standard algorithm, applies currently to e.g. virtual index
* properties of buffer objects (which are virtual but writable).
* (Cannot "force" modification of a virtual property.)
*/
if (curr.flags & DUK_PROPDESC_FLAG_VIRTUAL) {
goto fail_virtual;
}
/* Reject attempt to change a read-only object. */
#if defined(DUK_USE_ROM_OBJECTS)
if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)) {
DUK_DD(DUK_DDPRINT("attempt to define property on read-only target object"));
goto fail_not_configurable;
}
#endif
/* descriptor type specific checks */
if (has_set || has_get) {
/* IsAccessorDescriptor(desc) == true */
DUK_ASSERT(!has_writable);
DUK_ASSERT(!has_value);
if (curr.flags & DUK_PROPDESC_FLAG_ACCESSOR) {
/* curr and desc are accessors */
if (!(curr.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) && !force_flag) {
if (has_set && set != curr.set) {
goto fail_not_configurable;
}
if (has_get && get != curr.get) {
goto fail_not_configurable;
}
}
} else {
duk_bool_t rc;
duk_tval *tv1;
/* curr is data, desc is accessor */
if (!(curr.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) && !force_flag) {
goto fail_not_configurable;
}
DUK_DDD(DUK_DDDPRINT("convert property to accessor property"));
if (curr.a_idx >= 0) {
DUK_DDD(DUK_DDDPRINT("property to convert is stored in an array entry, abandon array and re-lookup"));
duk__abandon_array_checked(thr, obj);
duk_pop(ctx); /* remove old value */
rc = duk__get_own_propdesc_raw(thr, obj, key, arr_idx, &curr, DUK_GETDESC_FLAG_PUSH_VALUE);
DUK_UNREF(rc);
DUK_ASSERT(rc != 0);
DUK_ASSERT(curr.e_idx >= 0 && curr.a_idx < 0);
}
DUK_ASSERT(!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, obj, curr.e_idx));
tv1 = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, curr.e_idx);
/* XXX: just decref */
DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv1); /* side effects */
DUK_HOBJECT_E_SET_VALUE_GETTER(thr->heap, obj, curr.e_idx, NULL);
DUK_HOBJECT_E_SET_VALUE_SETTER(thr->heap, obj, curr.e_idx, NULL);
DUK_HOBJECT_E_SLOT_CLEAR_WRITABLE(thr->heap, obj, curr.e_idx);
DUK_HOBJECT_E_SLOT_SET_ACCESSOR(thr->heap, obj, curr.e_idx);
DUK_DDD(DUK_DDDPRINT("flags after data->accessor conversion: 0x%02lx",
(unsigned long) DUK_HOBJECT_E_GET_FLAGS(thr->heap, obj, curr.e_idx)));
/* re-lookup to update curr.flags
* XXX: would be faster to update directly
*/
duk_pop(ctx); /* remove old value */
rc = duk__get_own_propdesc_raw(thr, obj, key, arr_idx, &curr, DUK_GETDESC_FLAG_PUSH_VALUE);
DUK_UNREF(rc);
DUK_ASSERT(rc != 0);
}
} else if (has_value || has_writable) {
/* IsDataDescriptor(desc) == true */
DUK_ASSERT(!has_set);
DUK_ASSERT(!has_get);
if (curr.flags & DUK_PROPDESC_FLAG_ACCESSOR) {
duk_bool_t rc;
duk_hobject *tmp;
/* curr is accessor, desc is data */
if (!(curr.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) && !force_flag) {
goto fail_not_configurable;
}
/* curr is accessor -> cannot be in array part */
DUK_ASSERT(curr.e_idx >= 0 && curr.a_idx < 0);
DUK_DDD(DUK_DDDPRINT("convert property to data property"));
DUK_ASSERT(DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, obj, curr.e_idx));
tmp = DUK_HOBJECT_E_GET_VALUE_GETTER(thr->heap, obj, curr.e_idx);
DUK_UNREF(tmp);
DUK_HOBJECT_E_SET_VALUE_GETTER(thr->heap, obj, curr.e_idx, NULL);
DUK_HOBJECT_DECREF_ALLOWNULL(thr, tmp); /* side effects */
tmp = DUK_HOBJECT_E_GET_VALUE_SETTER(thr->heap, obj, curr.e_idx);
DUK_UNREF(tmp);
DUK_HOBJECT_E_SET_VALUE_SETTER(thr->heap, obj, curr.e_idx, NULL);
DUK_HOBJECT_DECREF_ALLOWNULL(thr, tmp); /* side effects */
DUK_TVAL_SET_UNDEFINED(DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, curr.e_idx));
DUK_HOBJECT_E_SLOT_CLEAR_WRITABLE(thr->heap, obj, curr.e_idx);
DUK_HOBJECT_E_SLOT_CLEAR_ACCESSOR(thr->heap, obj, curr.e_idx);
DUK_DDD(DUK_DDDPRINT("flags after accessor->data conversion: 0x%02lx",
(unsigned long) DUK_HOBJECT_E_GET_FLAGS(thr->heap, obj, curr.e_idx)));
/* re-lookup to update curr.flags
* XXX: would be faster to update directly
*/
duk_pop(ctx); /* remove old value */
rc = duk__get_own_propdesc_raw(thr, obj, key, arr_idx, &curr, DUK_GETDESC_FLAG_PUSH_VALUE);
DUK_UNREF(rc);
DUK_ASSERT(rc != 0);
} else {
/* curr and desc are data */
if (!(curr.flags & DUK_PROPDESC_FLAG_CONFIGURABLE) && !force_flag) {
if (!(curr.flags & DUK_PROPDESC_FLAG_WRITABLE) && has_writable && is_writable) {
goto fail_not_configurable;
}
/* Note: changing from writable to non-writable is OK */
if (!(curr.flags & DUK_PROPDESC_FLAG_WRITABLE) && has_value) {
duk_tval *tmp1 = duk_require_tval(ctx, -1); /* curr value */
duk_tval *tmp2 = duk_require_tval(ctx, idx_value); /* new value */
if (!duk_js_samevalue(tmp1, tmp2)) {
goto fail_not_configurable;
}
}
}
}
} else {
/* IsGenericDescriptor(desc) == true; this means in practice that 'desc'
* only has [[Enumerable]] or [[Configurable]] flag updates, which are
* allowed at this point.
*/
DUK_ASSERT(!has_value && !has_writable && !has_get && !has_set);
}
/*
* Start doing property attributes updates. Steps 12-13.
*
* Start by computing new attribute flags without writing yet.
* Property type conversion is done above if necessary.
*/
new_flags = curr.flags;
if (has_enumerable) {
if (is_enumerable) {
new_flags |= DUK_PROPDESC_FLAG_ENUMERABLE;
} else {
new_flags &= ~DUK_PROPDESC_FLAG_ENUMERABLE;
}
}
if (has_configurable) {
if (is_configurable) {
new_flags |= DUK_PROPDESC_FLAG_CONFIGURABLE;
} else {
new_flags &= ~DUK_PROPDESC_FLAG_CONFIGURABLE;
}
}
if (has_writable) {
if (is_writable) {
new_flags |= DUK_PROPDESC_FLAG_WRITABLE;
} else {
new_flags &= ~DUK_PROPDESC_FLAG_WRITABLE;
}
}
/* XXX: write protect after flag? -> any chance of handling it here? */
DUK_DDD(DUK_DDDPRINT("new flags that we want to write: 0x%02lx",
(unsigned long) new_flags));
/*
* Check whether we need to abandon an array part (if it exists)
*/
if (curr.a_idx >= 0) {
duk_bool_t rc;
DUK_ASSERT(curr.e_idx < 0);
if (new_flags == DUK_PROPDESC_FLAGS_WEC) {
duk_tval *tv1, *tv2;
DUK_DDD(DUK_DDDPRINT("array index, new property attributes match array defaults, update in-place"));
DUK_ASSERT(curr.flags == DUK_PROPDESC_FLAGS_WEC); /* must have been, since in array part */
DUK_ASSERT(!has_set);
DUK_ASSERT(!has_get);
tv2 = duk_require_tval(ctx, idx_value);
tv1 = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, curr.a_idx);
DUK_TVAL_SET_TVAL_UPDREF(thr, tv1, tv2); /* side effects */
goto success_exotics;
}
DUK_DDD(DUK_DDDPRINT("array index, new property attributes do not match array defaults, abandon array and re-lookup"));
duk__abandon_array_checked(thr, obj);
duk_pop(ctx); /* remove old value */
rc = duk__get_own_propdesc_raw(thr, obj, key, arr_idx, &curr, DUK_GETDESC_FLAG_PUSH_VALUE);
DUK_UNREF(rc);
DUK_ASSERT(rc != 0);
DUK_ASSERT(curr.e_idx >= 0 && curr.a_idx < 0);
}
DUK_DDD(DUK_DDDPRINT("updating existing property in entry part"));
/* array case is handled comprehensively above */
DUK_ASSERT(curr.e_idx >= 0 && curr.a_idx < 0);
DUK_DDD(DUK_DDDPRINT("update existing property attributes"));
DUK_HOBJECT_E_SET_FLAGS(thr->heap, obj, curr.e_idx, new_flags);
if (has_set) {
duk_hobject *tmp;
DUK_DDD(DUK_DDDPRINT("update existing property setter"));
DUK_ASSERT(DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, obj, curr.e_idx));
tmp = DUK_HOBJECT_E_GET_VALUE_SETTER(thr->heap, obj, curr.e_idx);
DUK_UNREF(tmp);
DUK_HOBJECT_E_SET_VALUE_SETTER(thr->heap, obj, curr.e_idx, set);
DUK_HOBJECT_INCREF_ALLOWNULL(thr, set);
DUK_HOBJECT_DECREF_ALLOWNULL(thr, tmp); /* side effects */
}
if (has_get) {
duk_hobject *tmp;
DUK_DDD(DUK_DDDPRINT("update existing property getter"));
DUK_ASSERT(DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, obj, curr.e_idx));
tmp = DUK_HOBJECT_E_GET_VALUE_GETTER(thr->heap, obj, curr.e_idx);
DUK_UNREF(tmp);
DUK_HOBJECT_E_SET_VALUE_GETTER(thr->heap, obj, curr.e_idx, get);
DUK_HOBJECT_INCREF_ALLOWNULL(thr, get);
DUK_HOBJECT_DECREF_ALLOWNULL(thr, tmp); /* side effects */
}
if (has_value) {
duk_tval *tv1, *tv2;
DUK_DDD(DUK_DDDPRINT("update existing property value"));
DUK_ASSERT(!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, obj, curr.e_idx));
tv2 = duk_require_tval(ctx, idx_value);
tv1 = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, curr.e_idx);
DUK_TVAL_SET_TVAL_UPDREF(thr, tv1, tv2); /* side effects */
}
/*
* Standard algorithm succeeded without errors, check for exotic post-behaviors.
*
* Arguments exotic behavior in E5 Section 10.6 occurs after the standard
* [[DefineOwnProperty]] has completed successfully.
*
* Array exotic behavior in E5 Section 15.4.5.1 is implemented partly
* prior to the default [[DefineOwnProperty]], but:
* - for an array index key (e.g. "10") the final 'length' update occurs here
* - for 'length' key the element deletion and 'length' update occurs here
*/
success_exotics:
/* [obj key desc value get set curr_value] */
if (DUK_HOBJECT_HAS_EXOTIC_ARRAY(obj)) {
if (arridx_new_array_length > 0) {
duk_tval *tmp;
duk_bool_t rc;
/*
* Note: zero works as a "no update" marker because the new length
* can never be zero after a new property is written.
*/
/* E5 Section 15.4.5.1, steps 4.e.i - 4.e.ii */
DUK_DDD(DUK_DDDPRINT("defineProperty successful, pending array length update to: %ld",
(long) arridx_new_array_length));
/* Note: reuse 'curr' */
rc = duk__get_own_propdesc_raw(thr, obj, DUK_HTHREAD_STRING_LENGTH(thr), DUK__NO_ARRAY_INDEX, &curr, 0 /*flags*/); /* don't push value */
DUK_UNREF(rc);
DUK_ASSERT(rc != 0);
DUK_ASSERT(curr.e_idx >= 0);
tmp = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, curr.e_idx);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tmp));
/* no need for decref/incref because value is a number */
DUK_TVAL_SET_FASTINT_U32(tmp, arridx_new_array_length);
}
if (key == DUK_HTHREAD_STRING_LENGTH(thr) && arrlen_new_len < arrlen_old_len) {
/*
* E5 Section 15.4.5.1, steps 3.k - 3.n. The order at the end combines
* the error case 3.l.iii and the success case 3.m-3.n.
*
* Note: 'length' is always in entries part, so no array abandon issues for
* 'writable' update.
*/
/* XXX: investigate whether write protect can be handled above, if we
* just update length here while ignoring its protected status
*/
duk_tval *tmp;
duk_uint32_t result_len;
duk_bool_t rc;
DUK_DDD(DUK_DDDPRINT("defineProperty successful, key is 'length', exotic array behavior, "
"doing array element deletion and length update"));
rc = duk__handle_put_array_length_smaller(thr, obj, arrlen_old_len, arrlen_new_len, force_flag, &result_len);
/* update length (curr points to length, and we assume it's still valid) */
DUK_ASSERT(result_len >= arrlen_new_len && result_len <= arrlen_old_len);
DUK_ASSERT(curr.e_idx >= 0);
DUK_ASSERT(!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, obj, curr.e_idx));
tmp = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, obj, curr.e_idx);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tmp));
/* no decref needed for a number */
DUK_TVAL_SET_FASTINT_U32(tmp, result_len);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tmp));
if (pending_write_protect) {
DUK_DDD(DUK_DDDPRINT("setting array length non-writable (pending writability update)"));
DUK_HOBJECT_E_SLOT_CLEAR_WRITABLE(thr->heap, obj, curr.e_idx);
}
/*
* XXX: shrink array allocation or entries compaction here?
*/
if (!rc) {
goto fail_array_length_partial;
}
}
} else if (arr_idx != DUK__NO_ARRAY_INDEX && DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj)) {
duk_hobject *map;
duk_hobject *varenv;
DUK_ASSERT(arridx_new_array_length == 0);
DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARRAY(obj)); /* traits are separate; in particular, arguments not an array */
map = NULL;
varenv = NULL;
if (!duk__lookup_arguments_map(thr, obj, key, &curr, &map, &varenv)) {
goto success_no_exotics;
}
DUK_ASSERT(map != NULL);
DUK_ASSERT(varenv != NULL);
/* [obj key desc value get set curr_value varname] */
if (has_set || has_get) {
/* = IsAccessorDescriptor(Desc) */
DUK_DDD(DUK_DDDPRINT("defineProperty successful, key mapped to arguments 'map' "
"changed to an accessor, delete arguments binding"));
(void) duk_hobject_delprop_raw(thr, map, key, 0); /* ignore result */
} else {
/* Note: this order matters (final value before deleting map entry must be done) */
DUK_DDD(DUK_DDDPRINT("defineProperty successful, key mapped to arguments 'map', "
"check for value update / binding deletion"));
if (has_value) {
duk_hstring *varname;
DUK_DDD(DUK_DDDPRINT("defineProperty successful, key mapped to arguments 'map', "
"update bound value (variable/argument)"));
varname = duk_require_hstring(ctx, -1);
DUK_ASSERT(varname != NULL);
DUK_DDD(DUK_DDDPRINT("arguments object automatic putvar for a bound variable; "
"key=%!O, varname=%!O, value=%!T",
(duk_heaphdr *) key,
(duk_heaphdr *) varname,
(duk_tval *) duk_require_tval(ctx, idx_value)));
/* strict flag for putvar comes from our caller (currently: fixed) */
duk_js_putvar_envrec(thr, varenv, varname, duk_require_tval(ctx, idx_value), throw_flag);
}
if (has_writable && !is_writable) {
DUK_DDD(DUK_DDDPRINT("defineProperty successful, key mapped to arguments 'map', "
"changed to non-writable, delete arguments binding"));
(void) duk_hobject_delprop_raw(thr, map, key, 0); /* ignore result */
}
}
/* 'varname' is in stack in this else branch, leaving an unbalanced stack below,
* but this doesn't matter now.
*/
}
success_no_exotics:
return;
fail_virtual:
DUK_ERROR_TYPE(thr, DUK_STR_PROPERTY_IS_VIRTUAL);
return;
fail_not_writable_array_length:
DUK_ERROR_TYPE(thr, DUK_STR_ARRAY_LENGTH_NOT_WRITABLE);
return;
fail_not_extensible:
DUK_ERROR_TYPE(thr, DUK_STR_NOT_EXTENSIBLE);
return;
fail_not_configurable:
DUK_ERROR_TYPE(thr, DUK_STR_NOT_CONFIGURABLE);
return;
fail_array_length_partial:
DUK_ERROR_TYPE(thr, DUK_STR_ARRAY_LENGTH_WRITE_FAILED);
return;
}
/*
* Object.prototype.hasOwnProperty() and Object.prototype.propertyIsEnumerable().
*/
DUK_INTERNAL duk_bool_t duk_hobject_object_ownprop_helper(duk_context *ctx, duk_small_uint_t required_desc_flags) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hstring *h_v;
duk_hobject *h_obj;
duk_propdesc desc;
duk_bool_t ret;
/* coercion order matters */
h_v = duk_to_hstring(ctx, 0);
DUK_ASSERT(h_v != NULL);
h_obj = duk_push_this_coercible_to_object(ctx);
DUK_ASSERT(h_obj != NULL);
ret = duk_hobject_get_own_propdesc(thr, h_obj, h_v, &desc, 0 /*flags*/); /* don't push value */
duk_push_boolean(ctx, ret && ((desc.flags & required_desc_flags) == required_desc_flags));
return 1;
}
/*
* Object.seal() and Object.freeze() (E5 Sections 15.2.3.8 and 15.2.3.9)
*
* Since the algorithms are similar, a helper provides both functions.
* Freezing is essentially sealing + making plain properties non-writable.
*
* Note: virtual (non-concrete) properties which are non-configurable but
* writable would pose some problems, but such properties do not currently
* exist (all virtual properties are non-configurable and non-writable).
* If they did exist, the non-configurability does NOT prevent them from
* becoming non-writable. However, this change should be recorded somehow
* so that it would turn up (e.g. when getting the property descriptor),
* requiring some additional flags in the object.
*/
DUK_INTERNAL void duk_hobject_object_seal_freeze_helper(duk_hthread *thr, duk_hobject *obj, duk_bool_t is_freeze) {
duk_uint_fast32_t i;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(obj != NULL);
DUK_ASSERT_VALSTACK_SPACE(thr, DUK__VALSTACK_SPACE);
#if defined(DUK_USE_ROM_OBJECTS)
if (DUK_HEAPHDR_HAS_READONLY((duk_heaphdr *) obj)) {
DUK_DD(DUK_DDPRINT("attempt to seal/freeze a readonly object, reject"));
DUK_ERROR_TYPE(thr, DUK_STR_NOT_CONFIGURABLE);
}
#endif
/*
* Abandon array part because all properties must become non-configurable.
* Note that this is now done regardless of whether this is always the case
* (skips check, but performance problem if caller would do this many times
* for the same object; not likely).
*/
duk__abandon_array_checked(thr, obj);
DUK_ASSERT(DUK_HOBJECT_GET_ASIZE(obj) == 0);
for (i = 0; i < DUK_HOBJECT_GET_ENEXT(obj); i++) {
duk_uint8_t *fp;
/* since duk__abandon_array_checked() causes a resize, there should be no gaps in keys */
DUK_ASSERT(DUK_HOBJECT_E_GET_KEY(thr->heap, obj, i) != NULL);
/* avoid multiple computations of flags address; bypasses macros */
fp = DUK_HOBJECT_E_GET_FLAGS_PTR(thr->heap, obj, i);
if (is_freeze && !((*fp) & DUK_PROPDESC_FLAG_ACCESSOR)) {
*fp &= ~(DUK_PROPDESC_FLAG_WRITABLE | DUK_PROPDESC_FLAG_CONFIGURABLE);
} else {
*fp &= ~DUK_PROPDESC_FLAG_CONFIGURABLE;
}
}
DUK_HOBJECT_CLEAR_EXTENSIBLE(obj);
/* no need to compact since we already did that in duk__abandon_array_checked()
* (regardless of whether an array part existed or not.
*/
return;
}
/*
* Object.isSealed() and Object.isFrozen() (E5 Sections 15.2.3.11, 15.2.3.13)
*
* Since the algorithms are similar, a helper provides both functions.
* Freezing is essentially sealing + making plain properties non-writable.
*
* Note: all virtual (non-concrete) properties are currently non-configurable
* and non-writable (and there are no accessor virtual properties), so they don't
* need to be considered here now.
*/
DUK_INTERNAL duk_bool_t duk_hobject_object_is_sealed_frozen_helper(duk_hthread *thr, duk_hobject *obj, duk_bool_t is_frozen) {
duk_uint_fast32_t i;
DUK_ASSERT(obj != NULL);
DUK_UNREF(thr);
/* Note: no allocation pressure, no need to check refcounts etc */
/* must not be extensible */
if (DUK_HOBJECT_HAS_EXTENSIBLE(obj)) {
return 0;
}
/* all virtual properties are non-configurable and non-writable */
/* entry part must not contain any configurable properties, or
* writable properties (if is_frozen).
*/
for (i = 0; i < DUK_HOBJECT_GET_ENEXT(obj); i++) {
duk_small_uint_t flags;
if (!DUK_HOBJECT_E_GET_KEY(thr->heap, obj, i)) {
continue;
}
/* avoid multiple computations of flags address; bypasses macros */
flags = (duk_small_uint_t) DUK_HOBJECT_E_GET_FLAGS(thr->heap, obj, i);
if (flags & DUK_PROPDESC_FLAG_CONFIGURABLE) {
return 0;
}
if (is_frozen &&
!(flags & DUK_PROPDESC_FLAG_ACCESSOR) &&
(flags & DUK_PROPDESC_FLAG_WRITABLE)) {
return 0;
}
}
/* array part must not contain any non-unused properties, as they would
* be configurable and writable.
*/
for (i = 0; i < DUK_HOBJECT_GET_ASIZE(obj); i++) {
duk_tval *tv = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, obj, i);
if (!DUK_TVAL_IS_UNUSED(tv)) {
return 0;
}
}
return 1;
}
/*
* Object.preventExtensions() and Object.isExtensible() (E5 Sections 15.2.3.10, 15.2.3.13)
*
* Not needed, implemented by macros DUK_HOBJECT_{HAS,CLEAR,SET}_EXTENSIBLE
* and the Object built-in bindings.
*/
/* Undefine local defines */
#undef DUK__NO_ARRAY_INDEX
#undef DUK__HASH_INITIAL
#undef DUK__HASH_PROBE_STEP
#undef DUK__HASH_UNUSED
#undef DUK__HASH_DELETED
#undef DUK__VALSTACK_SPACE
#line 1 "duk_hstring_misc.c"
/*
* Misc support functions
*/
/* include removed: duk_internal.h */
DUK_INTERNAL duk_ucodepoint_t duk_hstring_char_code_at_raw(duk_hthread *thr, duk_hstring *h, duk_uint_t pos) {
duk_uint32_t boff;
const duk_uint8_t *p, *p_start, *p_end;
duk_ucodepoint_t cp;
/* Caller must check character offset to be inside the string. */
DUK_ASSERT(thr != NULL);
DUK_ASSERT(h != NULL);
DUK_ASSERT_DISABLE(pos >= 0); /* unsigned */
DUK_ASSERT(pos < (duk_uint_t) DUK_HSTRING_GET_CHARLEN(h));
boff = duk_heap_strcache_offset_char2byte(thr, h, (duk_uint32_t) pos);
DUK_DDD(DUK_DDDPRINT("charCodeAt: pos=%ld -> boff=%ld, str=%!O",
(long) pos, (long) boff, (duk_heaphdr *) h));
DUK_ASSERT_DISABLE(boff >= 0);
DUK_ASSERT(boff < DUK_HSTRING_GET_BYTELEN(h));
p_start = DUK_HSTRING_GET_DATA(h);
p_end = p_start + DUK_HSTRING_GET_BYTELEN(h);
p = p_start + boff;
DUK_DDD(DUK_DDDPRINT("p_start=%p, p_end=%p, p=%p",
(const void *) p_start, (const void *) p_end,
(const void *) p));
/* This may throw an error though not for valid E5 strings. */
cp = duk_unicode_decode_xutf8_checked(thr, &p, p_start, p_end);
return cp;
}
#if !defined(DUK_USE_HSTRING_CLEN)
DUK_INTERNAL duk_size_t duk_hstring_get_charlen(duk_hstring *h) {
if (DUK_HSTRING_HAS_ASCII(h)) {
/* Most practical strings will go here. */
return DUK_HSTRING_GET_BYTELEN(h);
} else {
return duk_unicode_unvalidated_utf8_length(DUK_HSTRING_GET_DATA(h), DUK_HSTRING_GET_BYTELEN(h));
}
}
#endif /* !DUK_USE_HSTRING_CLEN */
#line 1 "duk_hthread_alloc.c"
/*
* duk_hthread allocation and freeing.
*/
/* include removed: duk_internal.h */
/*
* Allocate initial stacks for a thread. Note that 'thr' must be reachable
* as a garbage collection may be triggered by the allocation attempts.
* Returns zero (without leaking memory) if init fails.
*/
DUK_INTERNAL duk_bool_t duk_hthread_init_stacks(duk_heap *heap, duk_hthread *thr) {
duk_size_t alloc_size;
duk_size_t i;
DUK_ASSERT(heap != NULL);
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->valstack == NULL);
DUK_ASSERT(thr->valstack_end == NULL);
DUK_ASSERT(thr->valstack_bottom == NULL);
DUK_ASSERT(thr->valstack_top == NULL);
DUK_ASSERT(thr->callstack == NULL);
DUK_ASSERT(thr->catchstack == NULL);
/* valstack */
alloc_size = sizeof(duk_tval) * DUK_VALSTACK_INITIAL_SIZE;
thr->valstack = (duk_tval *) DUK_ALLOC(heap, alloc_size);
if (!thr->valstack) {
goto fail;
}
DUK_MEMZERO(thr->valstack, alloc_size);
thr->valstack_end = thr->valstack + DUK_VALSTACK_INITIAL_SIZE;
#if !defined(DUK_USE_PREFER_SIZE)
thr->valstack_size = DUK_VALSTACK_INITIAL_SIZE;
#endif
thr->valstack_bottom = thr->valstack;
thr->valstack_top = thr->valstack;
for (i = 0; i < DUK_VALSTACK_INITIAL_SIZE; i++) {
DUK_TVAL_SET_UNDEFINED(&thr->valstack[i]);
}
/* callstack */
alloc_size = sizeof(duk_activation) * DUK_CALLSTACK_INITIAL_SIZE;
thr->callstack = (duk_activation *) DUK_ALLOC(heap, alloc_size);
if (!thr->callstack) {
goto fail;
}
DUK_MEMZERO(thr->callstack, alloc_size);
thr->callstack_size = DUK_CALLSTACK_INITIAL_SIZE;
DUK_ASSERT(thr->callstack_top == 0);
/* catchstack */
alloc_size = sizeof(duk_catcher) * DUK_CATCHSTACK_INITIAL_SIZE;
thr->catchstack = (duk_catcher *) DUK_ALLOC(heap, alloc_size);
if (!thr->catchstack) {
goto fail;
}
DUK_MEMZERO(thr->catchstack, alloc_size);
thr->catchstack_size = DUK_CATCHSTACK_INITIAL_SIZE;
DUK_ASSERT(thr->catchstack_top == 0);
return 1;
fail:
DUK_FREE(heap, thr->valstack);
DUK_FREE(heap, thr->callstack);
DUK_FREE(heap, thr->catchstack);
thr->valstack = NULL;
thr->callstack = NULL;
thr->catchstack = NULL;
return 0;
}
/* For indirect allocs. */
DUK_INTERNAL void *duk_hthread_get_valstack_ptr(duk_heap *heap, void *ud) {
duk_hthread *thr = (duk_hthread *) ud;
DUK_UNREF(heap);
return (void *) thr->valstack;
}
DUK_INTERNAL void *duk_hthread_get_callstack_ptr(duk_heap *heap, void *ud) {
duk_hthread *thr = (duk_hthread *) ud;
DUK_UNREF(heap);
return (void *) thr->callstack;
}
DUK_INTERNAL void *duk_hthread_get_catchstack_ptr(duk_heap *heap, void *ud) {
duk_hthread *thr = (duk_hthread *) ud;
DUK_UNREF(heap);
return (void *) thr->catchstack;
}
#line 1 "duk_hthread_builtins.c"
/*
* Initialize built-in objects. Current thread must have a valstack
* and initialization errors may longjmp, so a setjmp() catch point
* must exist.
*/
/* include removed: duk_internal.h */
/*
* Encoding constants, must match genbuiltins.py
*/
#define DUK__CLASS_BITS 5
#define DUK__BIDX_BITS 7
#define DUK__STRIDX_BITS 9 /* XXX: try to optimize to 8 (would now be possible, <200 used) */
#define DUK__NATIDX_BITS 8
#define DUK__NUM_NORMAL_PROPS_BITS 6
#define DUK__NUM_FUNC_PROPS_BITS 6
#define DUK__PROP_FLAGS_BITS 3
#define DUK__STRING_LENGTH_BITS 8
#define DUK__STRING_CHAR_BITS 7
#define DUK__LENGTH_PROP_BITS 3
#define DUK__NARGS_BITS 3
#define DUK__PROP_TYPE_BITS 3
#define DUK__MAGIC_BITS 16
#define DUK__NARGS_VARARGS_MARKER 0x07
#define DUK__NO_CLASS_MARKER 0x00 /* 0 = DUK_HOBJECT_CLASS_UNUSED */
#define DUK__NO_BIDX_MARKER 0x7f
#define DUK__NO_STRIDX_MARKER 0xff
#define DUK__PROP_TYPE_DOUBLE 0
#define DUK__PROP_TYPE_STRING 1
#define DUK__PROP_TYPE_STRIDX 2
#define DUK__PROP_TYPE_BUILTIN 3
#define DUK__PROP_TYPE_UNDEFINED 4
#define DUK__PROP_TYPE_BOOLEAN_TRUE 5
#define DUK__PROP_TYPE_BOOLEAN_FALSE 6
#define DUK__PROP_TYPE_ACCESSOR 7
/*
* Create built-in objects by parsing an init bitstream generated
* by genbuiltins.py.
*/
#if defined(DUK_USE_ROM_OBJECTS)
#if defined(DUK_USE_ROM_GLOBAL_CLONE) || defined(DUK_USE_ROM_GLOBAL_INHERIT)
DUK_LOCAL void duk__duplicate_ram_global_object(duk_hthread *thr) {
duk_context *ctx;
duk_hobject *h1;
#if defined(DUK_USE_ROM_GLOBAL_CLONE)
duk_hobject *h2;
duk_uint8_t *props;
duk_size_t alloc_size;
#endif
ctx = (duk_context *) thr;
/* XXX: refactor into internal helper, duk_clone_hobject() */
#if defined(DUK_USE_ROM_GLOBAL_INHERIT)
/* Inherit from ROM-based global object: less RAM usage, less transparent. */
duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_GLOBAL),
DUK_BIDX_GLOBAL);
h1 = duk_get_hobject(ctx, -1);
DUK_ASSERT(h1 != NULL);
#elif defined(DUK_USE_ROM_GLOBAL_CLONE)
/* Clone the properties of the ROM-based global object to create a
* fully RAM-based global object. Uses more memory than the inherit
* model but more compliant.
*/
duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_GLOBAL),
DUK_BIDX_OBJECT_PROTOTYPE);
h1 = duk_get_hobject(ctx, -1);
DUK_ASSERT(h1 != NULL);
h2 = thr->builtins[DUK_BIDX_GLOBAL];
DUK_ASSERT(h2 != NULL);
/* Copy the property table verbatim; this handles attributes etc.
* For ROM objects it's not necessary (or possible) to update
* refcounts so leave them as is.
*/
alloc_size = DUK_HOBJECT_P_ALLOC_SIZE(h2);
DUK_ASSERT(alloc_size > 0);
props = DUK_ALLOC(thr->heap, alloc_size);
if (!props) {
DUK_ERROR_ALLOC_DEFMSG(thr);
return;
}
DUK_ASSERT(DUK_HOBJECT_GET_PROPS(thr->heap, h2) != NULL);
DUK_MEMCPY((void *) props, (const void *) DUK_HOBJECT_GET_PROPS(thr->heap, h2), alloc_size);
/* XXX: keep property attributes or tweak them here?
* Properties will now be non-configurable even when they're
* normally configurable for the global object.
*/
DUK_ASSERT(DUK_HOBJECT_GET_PROPS(thr->heap, h1) == NULL);
DUK_HOBJECT_SET_PROPS(thr->heap, h1, props);
DUK_HOBJECT_SET_ESIZE(h1, DUK_HOBJECT_GET_ESIZE(h2));
DUK_HOBJECT_SET_ENEXT(h1, DUK_HOBJECT_GET_ENEXT(h2));
DUK_HOBJECT_SET_ASIZE(h1, DUK_HOBJECT_GET_ASIZE(h2));
DUK_HOBJECT_SET_HSIZE(h1, DUK_HOBJECT_GET_HSIZE(h2));
#else
#error internal error in defines
#endif
duk_hobject_compact_props(thr, h1);
DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL] != NULL);
DUK_ASSERT(!DUK_HEAPHDR_NEEDS_REFCOUNT_UPDATE((duk_heaphdr *) thr->builtins[DUK_BIDX_GLOBAL])); /* no need to decref */
thr->builtins[DUK_BIDX_GLOBAL] = h1;
DUK_HOBJECT_INCREF(thr, h1);
DUK_D(DUK_DPRINT("duplicated global object: %!O", h1));
/* Create a fresh object environment for the global scope. This is
* needed so that the global scope points to the newly created RAM-based
* global object.
*/
duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJENV),
-1); /* no prototype */
h1 = duk_get_hobject(ctx, -1);
DUK_ASSERT(h1 != NULL);
duk_dup(ctx, -2);
duk_dup(ctx, -1); /* -> [ ... new_global new_globalenv new_global new_global ] */
duk_xdef_prop_stridx(thr, -3, DUK_STRIDX_INT_TARGET, DUK_PROPDESC_FLAGS_NONE);
duk_xdef_prop_stridx(thr, -2, DUK_STRIDX_INT_THIS, DUK_PROPDESC_FLAGS_NONE); /* always provideThis=true */
duk_hobject_compact_props(thr, h1);
DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL_ENV] != NULL);
DUK_ASSERT(!DUK_HEAPHDR_NEEDS_REFCOUNT_UPDATE((duk_heaphdr *) thr->builtins[DUK_BIDX_GLOBAL_ENV])); /* no need to decref */
thr->builtins[DUK_BIDX_GLOBAL_ENV] = h1;
DUK_HOBJECT_INCREF(thr, h1);
DUK_D(DUK_DPRINT("duplicated global env: %!O", h1));
duk_pop_2(ctx);
}
#endif /* DUK_USE_ROM_GLOBAL_CLONE || DUK_USE_ROM_GLOBAL_INHERIT */
DUK_INTERNAL void duk_hthread_create_builtin_objects(duk_hthread *thr) {
/* Setup builtins from ROM objects. All heaps/threads will share
* the same readonly objects.
*/
duk_small_uint_t i;
for (i = 0; i < DUK_NUM_BUILTINS; i++) {
duk_hobject *h;
h = (duk_hobject *) DUK_LOSE_CONST(duk_rom_builtins_bidx[i]);
DUK_ASSERT(h != NULL);
thr->builtins[i] = h;
}
#if defined(DUK_USE_ROM_GLOBAL_CLONE) || defined(DUK_USE_ROM_GLOBAL_INHERIT)
/* By default the global object is read-only which is often much
* more of an issue than having read-only built-in objects (like
* RegExp, Date, etc). Use a RAM-based copy of the global object
* and the global environment object for convenience.
*/
duk__duplicate_ram_global_object(thr);
#endif
}
#else /* DUK_USE_ROM_OBJECTS */
DUK_LOCAL void duk__push_stridx(duk_context *ctx, duk_bitdecoder_ctx *bd) {
duk_small_uint_t n;
n = (duk_small_uint_t) duk_bd_decode(bd, DUK__STRIDX_BITS);
DUK_ASSERT_DISABLE(n >= 0); /* unsigned */
DUK_ASSERT(n < DUK_HEAP_NUM_STRINGS);
duk_push_hstring_stridx(ctx, n);
}
DUK_LOCAL void duk__push_string(duk_context *ctx, duk_bitdecoder_ctx *bd) {
duk_small_uint_t n;
duk_small_uint_t i;
duk_uint8_t *p;
n = (duk_small_uint_t) duk_bd_decode(bd, DUK__STRING_LENGTH_BITS);
p = (duk_uint8_t *) duk_push_fixed_buffer(ctx, n);
for (i = 0; i < n; i++) {
*p++ = (duk_uint8_t) duk_bd_decode(bd, DUK__STRING_CHAR_BITS);
}
duk_to_string(ctx, -1);
}
DUK_LOCAL void duk__push_stridx_or_string(duk_context *ctx, duk_bitdecoder_ctx *bd) {
if (duk_bd_decode_flag(bd)) {
duk__push_string(ctx, bd);
} else {
duk__push_stridx(ctx, bd);
}
}
DUK_LOCAL void duk__push_double(duk_context *ctx, duk_bitdecoder_ctx *bd) {
duk_double_union du;
duk_small_uint_t i;
for (i = 0; i < 8; i++) {
/* Encoding endianness must match target memory layout,
* build scripts and genbuiltins.py must ensure this.
*/
du.uc[i] = (duk_uint8_t) duk_bd_decode(bd, 8);
}
duk_push_number(ctx, du.d); /* push operation normalizes NaNs */
}
DUK_INTERNAL void duk_hthread_create_builtin_objects(duk_hthread *thr) {
duk_context *ctx = (duk_context *) thr;
duk_bitdecoder_ctx bd_ctx;
duk_bitdecoder_ctx *bd = &bd_ctx; /* convenience */
duk_hobject *h;
duk_small_uint_t i, j;
DUK_D(DUK_DPRINT("INITBUILTINS BEGIN: DUK_NUM_BUILTINS=%d, DUK_NUM_BUILTINS_ALL=%d", (int) DUK_NUM_BUILTINS, (int) DUK_NUM_ALL_BUILTINS));
DUK_MEMZERO(&bd_ctx, sizeof(bd_ctx));
bd->data = (const duk_uint8_t *) duk_builtins_data;
bd->length = (duk_size_t) DUK_BUILTINS_DATA_LENGTH;
/*
* First create all built-in bare objects on the empty valstack.
*
* Built-ins in the index range [0,DUK_NUM_BUILTINS-1] have value
* stack indices matching their eventual thr->builtins[] index.
*
* Built-ins in the index range [DUK_NUM_BUILTINS,DUK_NUM_ALL_BUILTINS]
* will exist on the value stack during init but won't be placed
* into thr->builtins[]. These are objects referenced in some way
* from thr->builtins[] roots but which don't need to be indexed by
* Duktape through thr->builtins[] (e.g. user custom objects).
*/
duk_require_stack(ctx, DUK_NUM_ALL_BUILTINS);
DUK_DD(DUK_DDPRINT("create empty built-ins"));
DUK_ASSERT_TOP(ctx, 0);
for (i = 0; i < DUK_NUM_ALL_BUILTINS; i++) {
duk_small_uint_t class_num;
duk_small_int_t len = -1; /* must be signed */
class_num = (duk_small_uint_t) duk_bd_decode(bd, DUK__CLASS_BITS);
len = (duk_small_int_t) duk_bd_decode_flagged(bd, DUK__LENGTH_PROP_BITS, (duk_int32_t) -1 /*def_value*/);
if (class_num == DUK_HOBJECT_CLASS_FUNCTION) {
duk_small_uint_t natidx;
duk_int_t c_nargs; /* must hold DUK_VARARGS */
duk_c_function c_func;
duk_int16_t magic;
DUK_DDD(DUK_DDDPRINT("len=%ld", (long) len));
DUK_ASSERT(len >= 0);
natidx = (duk_small_uint_t) duk_bd_decode(bd, DUK__NATIDX_BITS);
c_func = duk_bi_native_functions[natidx];
c_nargs = (duk_small_uint_t) duk_bd_decode_flagged(bd, DUK__NARGS_BITS, len /*def_value*/);
if (c_nargs == DUK__NARGS_VARARGS_MARKER) {
c_nargs = DUK_VARARGS;
}
/* XXX: set magic directly here? (it could share the c_nargs arg) */
duk_push_c_function_noexotic(ctx, c_func, c_nargs);
h = duk_require_hobject(ctx, -1);
DUK_ASSERT(h != NULL);
/* Currently all built-in native functions are strict.
* duk_push_c_function() now sets strict flag, so
* assert for it.
*/
DUK_ASSERT(DUK_HOBJECT_HAS_STRICT(h));
/* XXX: function properties */
/* Built-in 'name' is not writable by default. Function '.name'
* is writable to allow user code to set a '.name' on a native
* function.
*/
duk__push_stridx_or_string(ctx, bd);
duk_xdef_prop_stridx(ctx,
-2,
DUK_STRIDX_NAME,
(i == DUK_BIDX_FUNCTION_PROTOTYPE) ?
DUK_PROPDESC_FLAGS_W : DUK_PROPDESC_FLAGS_NONE);
/* Almost all global level Function objects are constructable
* but not all: Function.prototype is a non-constructable,
* callable Function.
*/
if (duk_bd_decode_flag(bd)) {
DUK_ASSERT(DUK_HOBJECT_HAS_CONSTRUCTABLE(h));
} else {
DUK_HOBJECT_CLEAR_CONSTRUCTABLE(h);
}
/* Cast converts magic to 16-bit signed value */
magic = (duk_int16_t) duk_bd_decode_flagged(bd, DUK__MAGIC_BITS, 0 /*def_value*/);
((duk_hnativefunction *) h)->magic = magic;
} else {
/* XXX: ARRAY_PART for Array prototype? */
duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE,
-1); /* no prototype or class yet */
h = duk_require_hobject(ctx, -1);
DUK_ASSERT(h != NULL);
}
DUK_HOBJECT_SET_CLASS_NUMBER(h, class_num);
if (i < DUK_NUM_BUILTINS) {
thr->builtins[i] = h;
DUK_HOBJECT_INCREF(thr, &h->hdr);
}
if (len >= 0) {
/*
* For top-level objects, 'length' property has the following
* default attributes: non-writable, non-enumerable, non-configurable
* (E5 Section 15).
*
* However, 'length' property for Array.prototype has attributes
* expected of an Array instance which are different: writable,
* non-enumerable, non-configurable (E5 Section 15.4.5.2).
*
* This is currently determined implicitly based on class; there are
* no attribute flags in the init data.
*/
duk_push_int(ctx, len);
duk_xdef_prop_stridx(ctx,
-2,
DUK_STRIDX_LENGTH,
(class_num == DUK_HOBJECT_CLASS_ARRAY ? /* only Array.prototype matches */
DUK_PROPDESC_FLAGS_W : DUK_PROPDESC_FLAGS_NONE));
}
/* enable exotic behaviors last */
if (class_num == DUK_HOBJECT_CLASS_ARRAY) {
DUK_HOBJECT_SET_EXOTIC_ARRAY(h);
}
if (class_num == DUK_HOBJECT_CLASS_STRING) {
DUK_HOBJECT_SET_EXOTIC_STRINGOBJ(h);
}
/* some assertions */
DUK_ASSERT(DUK_HOBJECT_HAS_EXTENSIBLE(h));
/* DUK_HOBJECT_FLAG_CONSTRUCTABLE varies */
DUK_ASSERT(!DUK_HOBJECT_HAS_BOUND(h));
DUK_ASSERT(!DUK_HOBJECT_HAS_COMPILEDFUNCTION(h));
/* DUK_HOBJECT_FLAG_NATIVEFUNCTION varies */
DUK_ASSERT(!DUK_HOBJECT_HAS_THREAD(h));
DUK_ASSERT(!DUK_HOBJECT_HAS_ARRAY_PART(h)); /* currently, even for Array.prototype */
/* DUK_HOBJECT_FLAG_STRICT varies */
DUK_ASSERT(!DUK_HOBJECT_HAS_NATIVEFUNCTION(h) || /* all native functions have NEWENV */
DUK_HOBJECT_HAS_NEWENV(h));
DUK_ASSERT(!DUK_HOBJECT_HAS_NAMEBINDING(h));
DUK_ASSERT(!DUK_HOBJECT_HAS_CREATEARGS(h));
DUK_ASSERT(!DUK_HOBJECT_HAS_ENVRECCLOSED(h));
/* DUK_HOBJECT_FLAG_EXOTIC_ARRAY varies */
/* DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ varies */
DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(h));
DUK_DDD(DUK_DDDPRINT("created built-in %ld, class=%ld, length=%ld", (long) i, (long) class_num, (long) len));
}
/*
* Then decode the builtins init data (see genbuiltins.py) to
* init objects
*/
DUK_DD(DUK_DDPRINT("initialize built-in object properties"));
for (i = 0; i < DUK_NUM_ALL_BUILTINS; i++) {
duk_small_uint_t t;
duk_small_uint_t num;
DUK_DDD(DUK_DDDPRINT("initializing built-in object at index %ld", (long) i));
h = duk_require_hobject(ctx, i);
DUK_ASSERT(h != NULL);
t = (duk_small_uint_t) duk_bd_decode(bd, DUK__BIDX_BITS);
if (t != DUK__NO_BIDX_MARKER) {
DUK_DDD(DUK_DDDPRINT("set internal prototype: built-in %ld", (long) t));
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, h, duk_require_hobject(ctx, t));
}
t = (duk_small_uint_t) duk_bd_decode(bd, DUK__BIDX_BITS);
if (t != DUK__NO_BIDX_MARKER) {
/* 'prototype' property for all built-in objects (which have it) has attributes:
* [[Writable]] = false,
* [[Enumerable]] = false,
* [[Configurable]] = false
*/
DUK_DDD(DUK_DDDPRINT("set external prototype: built-in %ld", (long) t));
duk_xdef_prop_stridx_builtin(ctx, i, DUK_STRIDX_PROTOTYPE, t, DUK_PROPDESC_FLAGS_NONE);
}
t = (duk_small_uint_t) duk_bd_decode(bd, DUK__BIDX_BITS);
if (t != DUK__NO_BIDX_MARKER) {
/* 'constructor' property for all built-in objects (which have it) has attributes:
* [[Writable]] = true,
* [[Enumerable]] = false,
* [[Configurable]] = true
*/
DUK_DDD(DUK_DDDPRINT("set external constructor: built-in %ld", (long) t));
duk_xdef_prop_stridx_builtin(ctx, i, DUK_STRIDX_CONSTRUCTOR, t, DUK_PROPDESC_FLAGS_WC);
}
/* normal valued properties */
num = (duk_small_uint_t) duk_bd_decode(bd, DUK__NUM_NORMAL_PROPS_BITS);
DUK_DDD(DUK_DDDPRINT("built-in object %ld, %ld normal valued properties", (long) i, (long) num));
for (j = 0; j < num; j++) {
duk_small_uint_t prop_flags;
duk__push_stridx_or_string(ctx, bd);
/*
* Property attribute defaults are defined in E5 Section 15 (first
* few pages); there is a default for all properties and a special
* default for 'length' properties. Variation from the defaults is
* signaled using a single flag bit in the bitstream.
*/
if (duk_bd_decode_flag(bd)) {
prop_flags = (duk_small_uint_t) duk_bd_decode(bd, DUK__PROP_FLAGS_BITS);
} else {
prop_flags = DUK_PROPDESC_FLAGS_WC;
}
t = (duk_small_uint_t) duk_bd_decode(bd, DUK__PROP_TYPE_BITS);
DUK_DDD(DUK_DDDPRINT("built-in %ld, normal-valued property %ld, key %!T, flags 0x%02lx, type %ld",
(long) i, (long) j, duk_get_tval(ctx, -1), (unsigned long) prop_flags, (long) t));
switch (t) {
case DUK__PROP_TYPE_DOUBLE: {
duk__push_double(ctx, bd);
break;
}
case DUK__PROP_TYPE_STRING: {
duk__push_string(ctx, bd);
break;
}
case DUK__PROP_TYPE_STRIDX: {
duk__push_stridx(ctx, bd);
break;
}
case DUK__PROP_TYPE_BUILTIN: {
duk_small_uint_t bidx;
bidx = (duk_small_uint_t) duk_bd_decode(bd, DUK__BIDX_BITS);
DUK_ASSERT(bidx != DUK__NO_BIDX_MARKER);
duk_dup(ctx, (duk_idx_t) bidx);
break;
}
case DUK__PROP_TYPE_UNDEFINED: {
duk_push_undefined(ctx);
break;
}
case DUK__PROP_TYPE_BOOLEAN_TRUE: {
duk_push_true(ctx);
break;
}
case DUK__PROP_TYPE_BOOLEAN_FALSE: {
duk_push_false(ctx);
break;
}
case DUK__PROP_TYPE_ACCESSOR: {
duk_small_uint_t natidx_getter = (duk_small_uint_t) duk_bd_decode(bd, DUK__NATIDX_BITS);
duk_small_uint_t natidx_setter = (duk_small_uint_t) duk_bd_decode(bd, DUK__NATIDX_BITS);
duk_c_function c_func_getter;
duk_c_function c_func_setter;
/* XXX: this is a bit awkward because there is no exposed helper
* in the API style, only this internal helper.
*/
DUK_DDD(DUK_DDDPRINT("built-in accessor property: objidx=%ld, key=%!T, getteridx=%ld, setteridx=%ld, flags=0x%04lx",
(long) i, duk_get_tval(ctx, -1), (long) natidx_getter, (long) natidx_setter, (unsigned long) prop_flags));
c_func_getter = duk_bi_native_functions[natidx_getter];
c_func_setter = duk_bi_native_functions[natidx_setter];
duk_push_c_function_noconstruct_noexotic(ctx, c_func_getter, 0); /* always 0 args */
duk_push_c_function_noconstruct_noexotic(ctx, c_func_setter, 1); /* always 1 arg */
/* XXX: magic for getter/setter? use duk_def_prop()? */
DUK_ASSERT((prop_flags & DUK_PROPDESC_FLAG_WRITABLE) == 0); /* genbuiltins.py ensures */
prop_flags |= DUK_PROPDESC_FLAG_ACCESSOR; /* accessor flag not encoded explicitly */
duk_hobject_define_accessor_internal(thr,
duk_require_hobject(ctx, i),
duk_get_hstring(ctx, -3),
duk_require_hobject(ctx, -2),
duk_require_hobject(ctx, -1),
prop_flags);
duk_pop_3(ctx); /* key, getter and setter, now reachable through object */
goto skip_value;
}
default: {
/* exhaustive */
DUK_UNREACHABLE();
}
}
DUK_ASSERT((prop_flags & DUK_PROPDESC_FLAG_ACCESSOR) == 0);
duk_xdef_prop(ctx, i, prop_flags);
skip_value:
continue; /* avoid empty label at the end of a compound statement */
}
/* native function properties */
num = (duk_small_uint_t) duk_bd_decode(bd, DUK__NUM_FUNC_PROPS_BITS);
DUK_DDD(DUK_DDDPRINT("built-in object %ld, %ld function valued properties", (long) i, (long) num));
for (j = 0; j < num; j++) {
duk_hstring *h_key;
duk_small_uint_t natidx;
duk_int_t c_nargs; /* must hold DUK_VARARGS */
duk_small_uint_t c_length;
duk_int16_t magic;
duk_c_function c_func;
duk_hnativefunction *h_func;
#if defined(DUK_USE_LIGHTFUNC_BUILTINS)
duk_small_int_t lightfunc_eligible;
#endif
duk__push_stridx_or_string(ctx, bd);
h_key = duk_get_hstring(ctx, -1);
DUK_ASSERT(h_key != NULL);
DUK_UNREF(h_key);
natidx = (duk_small_uint_t) duk_bd_decode(bd, DUK__NATIDX_BITS);
c_length = (duk_small_uint_t) duk_bd_decode(bd, DUK__LENGTH_PROP_BITS);
c_nargs = (duk_int_t) duk_bd_decode_flagged(bd, DUK__NARGS_BITS, (duk_int32_t) c_length /*def_value*/);
if (c_nargs == DUK__NARGS_VARARGS_MARKER) {
c_nargs = DUK_VARARGS;
}
c_func = duk_bi_native_functions[natidx];
DUK_DDD(DUK_DDDPRINT("built-in %ld, function-valued property %ld, key %!O, natidx %ld, length %ld, nargs %ld",
(long) i, (long) j, (duk_heaphdr *) h_key, (long) natidx, (long) c_length,
(c_nargs == DUK_VARARGS ? (long) -1 : (long) c_nargs)));
/* Cast converts magic to 16-bit signed value */
magic = (duk_int16_t) duk_bd_decode_flagged(bd, DUK__MAGIC_BITS, 0);
#if defined(DUK_USE_LIGHTFUNC_BUILTINS)
lightfunc_eligible =
((c_nargs >= DUK_LFUNC_NARGS_MIN && c_nargs <= DUK_LFUNC_NARGS_MAX) || (c_nargs == DUK_VARARGS)) &&
(c_length <= DUK_LFUNC_LENGTH_MAX) &&
(magic >= DUK_LFUNC_MAGIC_MIN && magic <= DUK_LFUNC_MAGIC_MAX);
if (h_key == DUK_HTHREAD_STRING_EVAL(thr) ||
h_key == DUK_HTHREAD_STRING_YIELD(thr) ||
h_key == DUK_HTHREAD_STRING_RESUME(thr) ||
h_key == DUK_HTHREAD_STRING_REQUIRE(thr)) {
/* These functions have trouble working as lightfuncs.
* Some of them have specific asserts and some may have
* additional properties (e.g. 'require.id' may be written).
*/
DUK_D(DUK_DPRINT("reject as lightfunc: key=%!O, i=%d, j=%d", (duk_heaphdr *) h_key, (int) i, (int) j));
lightfunc_eligible = 0;
}
if (lightfunc_eligible) {
duk_tval tv_lfunc;
duk_small_uint_t lf_nargs = (c_nargs == DUK_VARARGS ? DUK_LFUNC_NARGS_VARARGS : c_nargs);
duk_small_uint_t lf_flags = DUK_LFUNC_FLAGS_PACK(magic, c_length, lf_nargs);
DUK_TVAL_SET_LIGHTFUNC(&tv_lfunc, c_func, lf_flags);
duk_push_tval(ctx, &tv_lfunc);
DUK_D(DUK_DPRINT("built-in function eligible as light function: i=%d, j=%d c_length=%ld, c_nargs=%ld, magic=%ld -> %!iT", (int) i, (int) j, (long) c_length, (long) c_nargs, (long) magic, duk_get_tval(ctx, -1)));
goto lightfunc_skip;
}
DUK_D(DUK_DPRINT("built-in function NOT ELIGIBLE as light function: i=%d, j=%d c_length=%ld, c_nargs=%ld, magic=%ld", (int) i, (int) j, (long) c_length, (long) c_nargs, (long) magic));
#endif /* DUK_USE_LIGHTFUNC_BUILTINS */
/* [ (builtin objects) name ] */
duk_push_c_function_noconstruct_noexotic(ctx, c_func, c_nargs);
h_func = duk_require_hnativefunction(ctx, -1);
DUK_UNREF(h_func);
/* Currently all built-in native functions are strict.
* This doesn't matter for many functions, but e.g.
* String.prototype.charAt (and other string functions)
* rely on being strict so that their 'this' binding is
* not automatically coerced.
*/
DUK_HOBJECT_SET_STRICT((duk_hobject *) h_func);
/* No built-in functions are constructable except the top
* level ones (Number, etc).
*/
DUK_ASSERT(!DUK_HOBJECT_HAS_CONSTRUCTABLE((duk_hobject *) h_func));
/* XXX: any way to avoid decoding magic bit; there are quite
* many function properties and relatively few with magic values.
*/
h_func->magic = magic;
/* [ (builtin objects) name func ] */
duk_push_int(ctx, c_length);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_NONE);
duk_dup(ctx, -2);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_NONE);
/* XXX: other properties of function instances; 'arguments', 'caller'. */
DUK_DD(DUK_DDPRINT("built-in object %ld, function property %ld -> %!T",
(long) i, (long) j, (duk_tval *) duk_get_tval(ctx, -1)));
/* [ (builtin objects) name func ] */
/*
* The default property attributes are correct for all
* function valued properties of built-in objects now.
*/
#if defined(DUK_USE_LIGHTFUNC_BUILTINS)
lightfunc_skip:
#endif
duk_xdef_prop(ctx, i, DUK_PROPDESC_FLAGS_WC);
/* [ (builtin objects) ] */
}
}
/*
* Special post-tweaks, for cases not covered by the init data format.
*
* - Set Date.prototype.toGMTString to Date.prototype.toUTCString.
* toGMTString is required to have the same Function object as
* toUTCString in E5 Section B.2.6. Note that while Smjs respects
* this, V8 does not (the Function objects are distinct).
*
* - Make DoubleError non-extensible.
*
* - Add info about most important effective compile options to Duktape.
*
* - Possibly remove some properties (values or methods) which are not
* desirable with current feature options but are not currently
* conditional in init data.
*/
duk_get_prop_stridx(ctx, DUK_BIDX_DATE_PROTOTYPE, DUK_STRIDX_TO_UTC_STRING);
duk_xdef_prop_stridx(ctx, DUK_BIDX_DATE_PROTOTYPE, DUK_STRIDX_TO_GMT_STRING, DUK_PROPDESC_FLAGS_WC);
h = duk_require_hobject(ctx, DUK_BIDX_DOUBLE_ERROR);
DUK_ASSERT(h != NULL);
DUK_HOBJECT_CLEAR_EXTENSIBLE(h);
#if !defined(DUK_USE_ES6_OBJECT_PROTO_PROPERTY)
DUK_DD(DUK_DDPRINT("delete Object.prototype.__proto__ built-in which is not enabled in features"));
(void) duk_hobject_delprop_raw(thr, thr->builtins[DUK_BIDX_OBJECT_PROTOTYPE], DUK_HTHREAD_STRING___PROTO__(thr), DUK_DELPROP_FLAG_THROW);
#endif
#if !defined(DUK_USE_ES6_OBJECT_SETPROTOTYPEOF)
DUK_DD(DUK_DDPRINT("delete Object.setPrototypeOf built-in which is not enabled in features"));
(void) duk_hobject_delprop_raw(thr, thr->builtins[DUK_BIDX_OBJECT_CONSTRUCTOR], DUK_HTHREAD_STRING_SET_PROTOTYPE_OF(thr), DUK_DELPROP_FLAG_THROW);
#endif
/* XXX: relocate */
duk_push_string(ctx,
/* Endianness indicator */
#if defined(DUK_USE_INTEGER_LE)
"l"
#elif defined(DUK_USE_INTEGER_BE)
"b"
#elif defined(DUK_USE_INTEGER_ME) /* integer mixed endian not really used now */
"m"
#else
"?"
#endif
#if defined(DUK_USE_DOUBLE_LE)
"l"
#elif defined(DUK_USE_DOUBLE_BE)
"b"
#elif defined(DUK_USE_DOUBLE_ME)
"m"
#else
"?"
#endif
" "
/* Packed or unpacked tval */
#if defined(DUK_USE_PACKED_TVAL)
"p"
#else
"u"
#endif
#if defined(DUK_USE_FASTINT)
"f"
#endif
" "
/* Low memory options */
#if defined(DUK_USE_STRTAB_CHAIN)
"c" /* chain */
#elif defined(DUK_USE_STRTAB_PROBE)
"p" /* probe */
#else
"?"
#endif
#if !defined(DUK_USE_HEAPPTR16) && !defined(DUK_DATAPTR16) && !defined(DUK_FUNCPTR16)
"n"
#endif
#if defined(DUK_USE_HEAPPTR16)
"h"
#endif
#if defined(DUK_USE_DATAPTR16)
"d"
#endif
#if defined(DUK_USE_FUNCPTR16)
"f"
#endif
#if defined(DUK_USE_REFCOUNT16)
"R"
#endif
#if defined(DUK_USE_STRHASH16)
"H"
#endif
#if defined(DUK_USE_STRLEN16)
"S"
#endif
#if defined(DUK_USE_BUFLEN16)
"B"
#endif
#if defined(DUK_USE_OBJSIZES16)
"O"
#endif
#if defined(DUK_USE_LIGHTFUNC_BUILTINS)
"L"
#endif
#if defined(DUK_USE_ROM_STRINGS) || defined(DUK_USE_ROM_OBJECTS)
/* XXX: This won't be shown in practice now
* because this code is not run when builtins
* are in ROM.
*/
"Z"
#endif
" "
/* Object property allocation layout */
#if defined(DUK_USE_HOBJECT_LAYOUT_1)
"p1"
#elif defined(DUK_USE_HOBJECT_LAYOUT_2)
"p2"
#elif defined(DUK_USE_HOBJECT_LAYOUT_3)
"p3"
#else
"p?"
#endif
" "
/* Alignment guarantee */
#if (DUK_USE_ALIGN_BY == 4)
"a4"
#elif (DUK_USE_ALIGN_BY == 8)
"a8"
#elif (DUK_USE_ALIGN_BY == 1)
"a1"
#else
#error invalid DUK_USE_ALIGN_BY
#endif
" "
/* Architecture, OS, and compiler strings */
DUK_USE_ARCH_STRING
" "
DUK_USE_OS_STRING
" "
DUK_USE_COMPILER_STRING);
duk_xdef_prop_stridx(ctx, DUK_BIDX_DUKTAPE, DUK_STRIDX_ENV, DUK_PROPDESC_FLAGS_WC);
/*
* InitJS code - Ecmascript code evaluated from a built-in source
* which provides e.g. backward compatibility. User can also provide
* JS code to be evaluated at startup.
*/
#ifdef DUK_USE_BUILTIN_INITJS
/* XXX: compression */
DUK_DD(DUK_DDPRINT("running built-in initjs"));
duk_eval_string(ctx, (const char *) duk_initjs_data); /* initjs data is NUL terminated */
duk_pop(ctx);
#endif /* DUK_USE_BUILTIN_INITJS */
#ifdef DUK_USE_USER_INITJS
/* XXX: compression (as an option) */
DUK_DD(DUK_DDPRINT("running user initjs"));
duk_eval_string_noresult(ctx, (const char *) DUK_USE_USER_INITJS);
#endif /* DUK_USE_USER_INITJS */
/*
* Since built-ins are not often extended, compact them.
*/
DUK_DD(DUK_DDPRINT("compact built-ins"));
for (i = 0; i < DUK_NUM_ALL_BUILTINS; i++) {
duk_hobject_compact_props(thr, duk_require_hobject(ctx, i));
}
DUK_D(DUK_DPRINT("INITBUILTINS END"));
#ifdef DUK_USE_DDPRINT
for (i = 0; i < DUK_NUM_ALL_BUILTINS; i++) {
DUK_DD(DUK_DDPRINT("built-in object %ld after initialization and compacting: %!@iO",
(long) i, (duk_heaphdr *) duk_require_hobject(ctx, i)));
}
#endif
/*
* Pop built-ins from stack: they are now INCREF'd and
* reachable from the builtins[] array or indirectly
* through builtins[].
*/
duk_set_top(ctx, 0);
DUK_ASSERT_TOP(ctx, 0);
}
#endif /* DUK_USE_ROM_OBJECTS */
DUK_INTERNAL void duk_hthread_copy_builtin_objects(duk_hthread *thr_from, duk_hthread *thr_to) {
duk_small_uint_t i;
for (i = 0; i < DUK_NUM_BUILTINS; i++) {
thr_to->builtins[i] = thr_from->builtins[i];
DUK_HOBJECT_INCREF_ALLOWNULL(thr_to, thr_to->builtins[i]); /* side effect free */
}
}
#line 1 "duk_hthread_misc.c"
/*
* Thread support.
*/
/* include removed: duk_internal.h */
DUK_INTERNAL void duk_hthread_terminate(duk_hthread *thr) {
DUK_ASSERT(thr != NULL);
/* Order of unwinding is important */
duk_hthread_catchstack_unwind(thr, 0);
duk_hthread_callstack_unwind(thr, 0); /* side effects, possibly errors */
thr->valstack_bottom = thr->valstack;
duk_set_top((duk_context *) thr, 0); /* unwinds valstack, updating refcounts */
thr->state = DUK_HTHREAD_STATE_TERMINATED;
/* Here we could remove references to built-ins, but it may not be
* worth the effort because built-ins are quite likely to be shared
* with another (unterminated) thread, and terminated threads are also
* usually garbage collected quite quickly. Also, doing DECREFs
* could trigger finalization, which would run on the current thread
* and have access to only some of the built-ins. Garbage collection
* deals with this correctly already.
*/
/* XXX: Shrink the stacks to minimize memory usage? May not
* be worth the effort because terminated threads are usually
* garbage collected quite soon.
*/
}
DUK_INTERNAL duk_activation *duk_hthread_get_current_activation(duk_hthread *thr) {
DUK_ASSERT(thr != NULL);
if (thr->callstack_top > 0) {
return thr->callstack + thr->callstack_top - 1;
} else {
return NULL;
}
}
#if defined(DUK_USE_DEBUGGER_SUPPORT)
DUK_INTERNAL duk_uint_fast32_t duk_hthread_get_act_curr_pc(duk_hthread *thr, duk_activation *act) {
duk_instr_t *bcode;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(act != NULL);
DUK_UNREF(thr);
/* XXX: store 'bcode' pointer to activation for faster lookup? */
if (act->func && DUK_HOBJECT_IS_COMPILEDFUNCTION(act->func)) {
bcode = DUK_HCOMPILEDFUNCTION_GET_CODE_BASE(thr->heap, (duk_hcompiledfunction *) (act->func));
return (duk_uint_fast32_t) (act->curr_pc - bcode);
}
return 0;
}
#endif /* DUK_USE_DEBUGGER_SUPPORT */
DUK_INTERNAL duk_uint_fast32_t duk_hthread_get_act_prev_pc(duk_hthread *thr, duk_activation *act) {
duk_instr_t *bcode;
duk_uint_fast32_t ret;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(act != NULL);
DUK_UNREF(thr);
if (act->func && DUK_HOBJECT_IS_COMPILEDFUNCTION(act->func)) {
bcode = DUK_HCOMPILEDFUNCTION_GET_CODE_BASE(thr->heap, (duk_hcompiledfunction *) (act->func));
ret = (duk_uint_fast32_t) (act->curr_pc - bcode);
if (ret > 0) {
ret--;
}
return ret;
}
return 0;
}
/* Write bytecode executor's curr_pc back to topmost activation (if any). */
DUK_INTERNAL void duk_hthread_sync_currpc(duk_hthread *thr) {
duk_activation *act;
DUK_ASSERT(thr != NULL);
if (thr->ptr_curr_pc != NULL) {
/* ptr_curr_pc != NULL only when bytecode executor is active. */
DUK_ASSERT(thr->callstack_top > 0);
act = thr->callstack + thr->callstack_top - 1;
act->curr_pc = *thr->ptr_curr_pc;
}
}
DUK_INTERNAL void duk_hthread_sync_and_null_currpc(duk_hthread *thr) {
duk_activation *act;
DUK_ASSERT(thr != NULL);
if (thr->ptr_curr_pc != NULL) {
/* ptr_curr_pc != NULL only when bytecode executor is active. */
DUK_ASSERT(thr->callstack_top > 0);
act = thr->callstack + thr->callstack_top - 1;
act->curr_pc = *thr->ptr_curr_pc;
thr->ptr_curr_pc = NULL;
}
}
#line 1 "duk_hthread_stacks.c"
/*
* Manipulation of thread stacks (valstack, callstack, catchstack).
*
* Ideally unwinding of stacks should have no side effects, which would
* then favor separate unwinding and shrink check primitives for each
* stack type. A shrink check may realloc and thus have side effects.
*
* However, currently callstack unwinding itself has side effects, as it
* needs to DECREF multiple objects, close environment records, etc.
* Stacks must thus be unwound in the correct order by the caller.
*
* (XXX: This should be probably reworked so that there is a shared
* unwind primitive which handles all stacks as requested, and knows
* the proper order for unwinding.)
*
* Valstack entries above 'top' are always kept initialized to
* "undefined unused". Callstack and catchstack entries above 'top'
* are not zeroed and are left as garbage.
*
* Value stack handling is mostly a part of the API implementation.
*/
/* include removed: duk_internal.h */
/* check that there is space for at least one new entry */
DUK_INTERNAL void duk_hthread_callstack_grow(duk_hthread *thr) {
duk_activation *new_ptr;
duk_size_t old_size;
duk_size_t new_size;
DUK_ASSERT(thr != NULL);
DUK_ASSERT_DISABLE(thr->callstack_top >= 0); /* avoid warning (unsigned) */
DUK_ASSERT(thr->callstack_size >= thr->callstack_top);
if (thr->callstack_top < thr->callstack_size) {
return;
}
old_size = thr->callstack_size;
new_size = old_size + DUK_CALLSTACK_GROW_STEP;
/* this is a bit approximate (errors out before max is reached); this is OK */
if (new_size >= thr->callstack_max) {
DUK_ERROR_RANGE(thr, DUK_STR_CALLSTACK_LIMIT);
}
DUK_DD(DUK_DDPRINT("growing callstack %ld -> %ld", (long) old_size, (long) new_size));
/*
* Note: must use indirect variant of DUK_REALLOC() because underlying
* pointer may be changed by mark-and-sweep.
*/
DUK_ASSERT(new_size > 0);
new_ptr = (duk_activation *) DUK_REALLOC_INDIRECT(thr->heap, duk_hthread_get_callstack_ptr, (void *) thr, sizeof(duk_activation) * new_size);
if (!new_ptr) {
/* No need for a NULL/zero-size check because new_size > 0) */
DUK_ERROR_ALLOC_DEFMSG(thr);
}
thr->callstack = new_ptr;
thr->callstack_size = new_size;
/* note: any entries above the callstack top are garbage and not zeroed */
}
DUK_INTERNAL void duk_hthread_callstack_shrink_check(duk_hthread *thr) {
duk_size_t new_size;
duk_activation *p;
DUK_ASSERT(thr != NULL);
DUK_ASSERT_DISABLE(thr->callstack_top >= 0); /* avoid warning (unsigned) */
DUK_ASSERT(thr->callstack_size >= thr->callstack_top);
if (thr->callstack_size - thr->callstack_top < DUK_CALLSTACK_SHRINK_THRESHOLD) {
return;
}
new_size = thr->callstack_top + DUK_CALLSTACK_SHRINK_SPARE;
DUK_ASSERT(new_size >= thr->callstack_top);
DUK_DD(DUK_DDPRINT("shrinking callstack %ld -> %ld", (long) thr->callstack_size, (long) new_size));
/*
* Note: must use indirect variant of DUK_REALLOC() because underlying
* pointer may be changed by mark-and-sweep.
*/
/* shrink failure is not fatal */
p = (duk_activation *) DUK_REALLOC_INDIRECT(thr->heap, duk_hthread_get_callstack_ptr, (void *) thr, sizeof(duk_activation) * new_size);
if (p) {
thr->callstack = p;
thr->callstack_size = new_size;
} else {
/* Because new_size != 0, if condition doesn't need to be
* (p != NULL || new_size == 0).
*/
DUK_ASSERT(new_size != 0);
DUK_D(DUK_DPRINT("callstack shrink failed, ignoring"));
}
/* note: any entries above the callstack top are garbage and not zeroed */
}
DUK_INTERNAL void duk_hthread_callstack_unwind(duk_hthread *thr, duk_size_t new_top) {
duk_size_t idx;
DUK_DDD(DUK_DDDPRINT("unwind callstack top of thread %p from %ld to %ld",
(void *) thr,
(thr != NULL ? (long) thr->callstack_top : (long) -1),
(long) new_top));
DUK_ASSERT(thr);
DUK_ASSERT(thr->heap);
DUK_ASSERT_DISABLE(new_top >= 0); /* unsigned */
DUK_ASSERT((duk_size_t) new_top <= thr->callstack_top); /* cannot grow */
/*
* The loop below must avoid issues with potential callstack
* reallocations. A resize (and other side effects) may happen
* e.g. due to finalizer/errhandler calls caused by a refzero or
* mark-and-sweep. Arbitrary finalizers may run, because when
* an environment record is refzero'd, it may refer to arbitrary
* values which also become refzero'd.
*
* So, the pointer 'p' is re-looked-up below whenever a side effect
* might have changed it.
*/
idx = thr->callstack_top;
while (idx > new_top) {
duk_activation *act;
duk_hobject *func;
#ifdef DUK_USE_REFERENCE_COUNTING
duk_hobject *tmp;
#endif
#ifdef DUK_USE_DEBUGGER_SUPPORT
duk_heap *heap;
#endif
idx--;
DUK_ASSERT_DISABLE(idx >= 0); /* unsigned */
DUK_ASSERT((duk_size_t) idx < thr->callstack_size); /* true, despite side effect resizes */
act = thr->callstack + idx;
/* With lightfuncs, act 'func' may be NULL */
#ifdef DUK_USE_NONSTD_FUNC_CALLER_PROPERTY
/*
* Restore 'caller' property for non-strict callee functions.
*/
func = DUK_ACT_GET_FUNC(act);
if (func != NULL && !DUK_HOBJECT_HAS_STRICT(func)) {
duk_tval *tv_caller;
duk_tval tv_tmp;
duk_hobject *h_tmp;
tv_caller = duk_hobject_find_existing_entry_tval_ptr(thr->heap, func, DUK_HTHREAD_STRING_CALLER(thr));
/* The act->prev_caller should only be set if the entry for 'caller'
* exists (as it is only set in that case, and the property is not
* configurable), but handle all the cases anyway.
*/
if (tv_caller) {
DUK_TVAL_SET_TVAL(&tv_tmp, tv_caller);
if (act->prev_caller) {
/* Just transfer the refcount from act->prev_caller to tv_caller,
* so no need for a refcount update. This is the expected case.
*/
DUK_TVAL_SET_OBJECT(tv_caller, act->prev_caller);
act->prev_caller = NULL;
} else {
DUK_TVAL_SET_NULL(tv_caller); /* no incref needed */
DUK_ASSERT(act->prev_caller == NULL);
}
DUK_TVAL_DECREF(thr, &tv_tmp); /* side effects */
} else {
h_tmp = act->prev_caller;
if (h_tmp) {
act->prev_caller = NULL;
DUK_HOBJECT_DECREF(thr, h_tmp); /* side effects */
}
}
act = thr->callstack + idx; /* avoid side effects */
DUK_ASSERT(act->prev_caller == NULL);
}
#endif
/*
* Unwind debugger state. If we unwind while stepping
* (either step over or step into), pause execution.
*/
#if defined(DUK_USE_DEBUGGER_SUPPORT)
heap = thr->heap;
if (heap->dbg_step_thread == thr &&
heap->dbg_step_csindex == idx) {
/* Pause for all step types: step into, step over, step out.
* This is the only place explicitly handling a step out.
*/
DUK_HEAP_SET_PAUSED(heap);
DUK_ASSERT(heap->dbg_step_thread == NULL);
}
#endif
/*
* Close environment record(s) if they exist.
*
* Only variable environments are closed. If lex_env != var_env, it
* cannot currently contain any register bound declarations.
*
* Only environments created for a NEWENV function are closed. If an
* environment is created for e.g. an eval call, it must not be closed.
*/
func = DUK_ACT_GET_FUNC(act);
if (func != NULL && !DUK_HOBJECT_HAS_NEWENV(func)) {
DUK_DDD(DUK_DDDPRINT("skip closing environments, envs not owned by this activation"));
goto skip_env_close;
}
/* func is NULL for lightfunc */
DUK_ASSERT(act->lex_env == act->var_env);
if (act->var_env != NULL) {
DUK_DDD(DUK_DDDPRINT("closing var_env record %p -> %!O",
(void *) act->var_env, (duk_heaphdr *) act->var_env));
duk_js_close_environment_record(thr, act->var_env, func, act->idx_bottom);
act = thr->callstack + idx; /* avoid side effect issues */
}
#if 0
if (act->lex_env != NULL) {
if (act->lex_env == act->var_env) {
/* common case, already closed, so skip */
DUK_DD(DUK_DDPRINT("lex_env and var_env are the same and lex_env "
"already closed -> skip closing lex_env"));
;
} else {
DUK_DD(DUK_DDPRINT("closing lex_env record %p -> %!O",
(void *) act->lex_env, (duk_heaphdr *) act->lex_env));
duk_js_close_environment_record(thr, act->lex_env, DUK_ACT_GET_FUNC(act), act->idx_bottom);
act = thr->callstack + idx; /* avoid side effect issues */
}
}
#endif
DUK_ASSERT((act->lex_env == NULL) ||
((duk_hobject_find_existing_entry_tval_ptr(thr->heap, act->lex_env, DUK_HTHREAD_STRING_INT_CALLEE(thr)) == NULL) &&
(duk_hobject_find_existing_entry_tval_ptr(thr->heap, act->lex_env, DUK_HTHREAD_STRING_INT_VARMAP(thr)) == NULL) &&
(duk_hobject_find_existing_entry_tval_ptr(thr->heap, act->lex_env, DUK_HTHREAD_STRING_INT_THREAD(thr)) == NULL) &&
(duk_hobject_find_existing_entry_tval_ptr(thr->heap, act->lex_env, DUK_HTHREAD_STRING_INT_REGBASE(thr)) == NULL)));
DUK_ASSERT((act->var_env == NULL) ||
((duk_hobject_find_existing_entry_tval_ptr(thr->heap, act->var_env, DUK_HTHREAD_STRING_INT_CALLEE(thr)) == NULL) &&
(duk_hobject_find_existing_entry_tval_ptr(thr->heap, act->var_env, DUK_HTHREAD_STRING_INT_VARMAP(thr)) == NULL) &&
(duk_hobject_find_existing_entry_tval_ptr(thr->heap, act->var_env, DUK_HTHREAD_STRING_INT_THREAD(thr)) == NULL) &&
(duk_hobject_find_existing_entry_tval_ptr(thr->heap, act->var_env, DUK_HTHREAD_STRING_INT_REGBASE(thr)) == NULL)));
skip_env_close:
/*
* Update preventcount
*/
if (act->flags & DUK_ACT_FLAG_PREVENT_YIELD) {
DUK_ASSERT(thr->callstack_preventcount >= 1);
thr->callstack_preventcount--;
}
/*
* Reference count updates
*
* Note: careful manipulation of refcounts. The top is
* not updated yet, so all the activations are reachable
* for mark-and-sweep (which may be triggered by decref).
* However, the pointers are NULL so this is not an issue.
*/
#ifdef DUK_USE_REFERENCE_COUNTING
tmp = act->var_env;
#endif
act->var_env = NULL;
#ifdef DUK_USE_REFERENCE_COUNTING
DUK_HOBJECT_DECREF_ALLOWNULL(thr, tmp);
act = thr->callstack + idx; /* avoid side effect issues */
#endif
#ifdef DUK_USE_REFERENCE_COUNTING
tmp = act->lex_env;
#endif
act->lex_env = NULL;
#ifdef DUK_USE_REFERENCE_COUNTING
DUK_HOBJECT_DECREF_ALLOWNULL(thr, tmp);
act = thr->callstack + idx; /* avoid side effect issues */
#endif
/* Note: this may cause a corner case situation where a finalizer
* may see a currently reachable activation whose 'func' is NULL.
*/
#ifdef DUK_USE_REFERENCE_COUNTING
tmp = DUK_ACT_GET_FUNC(act);
#endif
act->func = NULL;
#ifdef DUK_USE_REFERENCE_COUNTING
DUK_HOBJECT_DECREF_ALLOWNULL(thr, tmp);
act = thr->callstack + idx; /* avoid side effect issues */
DUK_UNREF(act);
#endif
}
thr->callstack_top = new_top;
/*
* We could clear the book-keeping variables for the topmost activation,
* but don't do so now.
*/
#if 0
if (thr->callstack_top > 0) {
duk_activation *act = thr->callstack + thr->callstack_top - 1;
act->idx_retval = 0;
}
#endif
/* Note: any entries above the callstack top are garbage and not zeroed.
* Also topmost activation idx_retval is garbage (not zeroed), and must
* be ignored.
*/
}
DUK_INTERNAL void duk_hthread_catchstack_grow(duk_hthread *thr) {
duk_catcher *new_ptr;
duk_size_t old_size;
duk_size_t new_size;
DUK_ASSERT(thr != NULL);
DUK_ASSERT_DISABLE(thr->catchstack_top); /* avoid warning (unsigned) */
DUK_ASSERT(thr->catchstack_size >= thr->catchstack_top);
if (thr->catchstack_top < thr->catchstack_size) {
return;
}
old_size = thr->catchstack_size;
new_size = old_size + DUK_CATCHSTACK_GROW_STEP;
/* this is a bit approximate (errors out before max is reached); this is OK */
if (new_size >= thr->catchstack_max) {
DUK_ERROR_RANGE(thr, DUK_STR_CATCHSTACK_LIMIT);
}
DUK_DD(DUK_DDPRINT("growing catchstack %ld -> %ld", (long) old_size, (long) new_size));
/*
* Note: must use indirect variant of DUK_REALLOC() because underlying
* pointer may be changed by mark-and-sweep.
*/
DUK_ASSERT(new_size > 0);
new_ptr = (duk_catcher *) DUK_REALLOC_INDIRECT(thr->heap, duk_hthread_get_catchstack_ptr, (void *) thr, sizeof(duk_catcher) * new_size);
if (!new_ptr) {
/* No need for a NULL/zero-size check because new_size > 0) */
DUK_ERROR_ALLOC_DEFMSG(thr);
}
thr->catchstack = new_ptr;
thr->catchstack_size = new_size;
/* note: any entries above the catchstack top are garbage and not zeroed */
}
DUK_INTERNAL void duk_hthread_catchstack_shrink_check(duk_hthread *thr) {
duk_size_t new_size;
duk_catcher *p;
DUK_ASSERT(thr != NULL);
DUK_ASSERT_DISABLE(thr->catchstack_top >= 0); /* avoid warning (unsigned) */
DUK_ASSERT(thr->catchstack_size >= thr->catchstack_top);
if (thr->catchstack_size - thr->catchstack_top < DUK_CATCHSTACK_SHRINK_THRESHOLD) {
return;
}
new_size = thr->catchstack_top + DUK_CATCHSTACK_SHRINK_SPARE;
DUK_ASSERT(new_size >= thr->catchstack_top);
DUK_DD(DUK_DDPRINT("shrinking catchstack %ld -> %ld", (long) thr->catchstack_size, (long) new_size));
/*
* Note: must use indirect variant of DUK_REALLOC() because underlying
* pointer may be changed by mark-and-sweep.
*/
/* shrink failure is not fatal */
p = (duk_catcher *) DUK_REALLOC_INDIRECT(thr->heap, duk_hthread_get_catchstack_ptr, (void *) thr, sizeof(duk_catcher) * new_size);
if (p) {
thr->catchstack = p;
thr->catchstack_size = new_size;
} else {
/* Because new_size != 0, if condition doesn't need to be
* (p != NULL || new_size == 0).
*/
DUK_ASSERT(new_size != 0);
DUK_D(DUK_DPRINT("catchstack shrink failed, ignoring"));
}
/* note: any entries above the catchstack top are garbage and not zeroed */
}
DUK_INTERNAL void duk_hthread_catchstack_unwind(duk_hthread *thr, duk_size_t new_top) {
duk_size_t idx;
DUK_DDD(DUK_DDDPRINT("unwind catchstack top of thread %p from %ld to %ld",
(void *) thr,
(thr != NULL ? (long) thr->catchstack_top : (long) -1),
(long) new_top));
DUK_ASSERT(thr);
DUK_ASSERT(thr->heap);
DUK_ASSERT_DISABLE(new_top >= 0); /* unsigned */
DUK_ASSERT((duk_size_t) new_top <= thr->catchstack_top); /* cannot grow */
/*
* Since there are no references in the catcher structure,
* unwinding is quite simple. The only thing we need to
* look out for is popping a possible lexical environment
* established for an active catch clause.
*/
idx = thr->catchstack_top;
while (idx > new_top) {
duk_catcher *p;
duk_activation *act;
duk_hobject *env;
idx--;
DUK_ASSERT_DISABLE(idx >= 0); /* unsigned */
DUK_ASSERT((duk_size_t) idx < thr->catchstack_size);
p = thr->catchstack + idx;
if (DUK_CAT_HAS_LEXENV_ACTIVE(p)) {
DUK_DDD(DUK_DDDPRINT("unwinding catchstack idx %ld, callstack idx %ld, callstack top %ld: lexical environment active",
(long) idx, (long) p->callstack_index, (long) thr->callstack_top));
/* XXX: Here we have a nasty dependency: the need to manipulate
* the callstack means that catchstack must always be unwound by
* the caller before unwinding the callstack. This should be fixed
* later.
*/
/* Note that multiple catchstack entries may refer to the same
* callstack entry.
*/
act = thr->callstack + p->callstack_index;
DUK_ASSERT(act >= thr->callstack);
DUK_ASSERT(act < thr->callstack + thr->callstack_top);
DUK_DDD(DUK_DDDPRINT("catchstack_index=%ld, callstack_index=%ld, lex_env=%!iO",
(long) idx, (long) p->callstack_index,
(duk_heaphdr *) act->lex_env));
env = act->lex_env; /* current lex_env of the activation (created for catcher) */
DUK_ASSERT(env != NULL); /* must be, since env was created when catcher was created */
act->lex_env = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, env); /* prototype is lex_env before catcher created */
DUK_HOBJECT_DECREF(thr, env);
/* There is no need to decref anything else than 'env': if 'env'
* becomes unreachable, refzero will handle decref'ing its prototype.
*/
}
}
thr->catchstack_top = new_top;
/* note: any entries above the catchstack top are garbage and not zeroed */
}
#line 1 "duk_js_call.c"
/*
* Call handling.
*
* Main functions are:
*
* - duk_handle_call_unprotected(): unprotected call to Ecmascript or
* Duktape/C function
* - duk_handle_call_protected(): protected call to Ecmascript or
* Duktape/C function
* - duk_handle_safe_call(): make a protected C call within current
* activation
* - duk_handle_ecma_call_setup(): Ecmascript-to-Ecmascript calls
* (not always possible), including tail calls and coroutine resume
*
* See 'execution.rst'.
*
* Note: setjmp() and local variables have a nasty interaction,
* see execution.rst; non-volatile locals modified after setjmp()
* call are not guaranteed to keep their value.
*/
/* include removed: duk_internal.h */
/*
* Forward declarations.
*/
DUK_LOCAL void duk__handle_call_inner(duk_hthread *thr,
duk_idx_t num_stack_args,
duk_small_uint_t call_flags,
duk_idx_t idx_func);
DUK_LOCAL void duk__handle_call_error(duk_hthread *thr,
duk_size_t entry_valstack_bottom_index,
duk_size_t entry_valstack_end,
duk_size_t entry_catchstack_top,
duk_size_t entry_callstack_top,
duk_int_t entry_call_recursion_depth,
duk_hthread *entry_curr_thread,
duk_uint_fast8_t entry_thread_state,
duk_instr_t **entry_ptr_curr_pc,
duk_idx_t idx_func,
duk_jmpbuf *old_jmpbuf_ptr);
DUK_LOCAL void duk__handle_safe_call_inner(duk_hthread *thr,
duk_safe_call_function func,
duk_idx_t idx_retbase,
duk_idx_t num_stack_rets,
duk_size_t entry_valstack_bottom_index,
duk_size_t entry_callstack_top,
duk_size_t entry_catchstack_top);
DUK_LOCAL void duk__handle_safe_call_error(duk_hthread *thr,
duk_idx_t idx_retbase,
duk_idx_t num_stack_rets,
duk_size_t entry_valstack_bottom_index,
duk_size_t entry_callstack_top,
duk_size_t entry_catchstack_top,
duk_jmpbuf *old_jmpbuf_ptr);
DUK_LOCAL void duk__handle_safe_call_shared(duk_hthread *thr,
duk_idx_t idx_retbase,
duk_idx_t num_stack_rets,
duk_int_t entry_call_recursion_depth,
duk_hthread *entry_curr_thread,
duk_uint_fast8_t entry_thread_state,
duk_instr_t **entry_ptr_curr_pc);
/*
* Interrupt counter fixup (for development only).
*/
#if defined(DUK_USE_INTERRUPT_COUNTER) && defined(DUK_USE_DEBUG)
DUK_LOCAL void duk__interrupt_fixup(duk_hthread *thr, duk_hthread *entry_curr_thread) {
/* Currently the bytecode executor and executor interrupt
* instruction counts are off because we don't execute the
* interrupt handler when we're about to exit from the initial
* user call into Duktape.
*
* If we were to execute the interrupt handler here, the counts
* would match. You can enable this block manually to check
* that this is the case.
*/
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
#if defined(DUK_USE_INTERRUPT_DEBUG_FIXUP)
if (entry_curr_thread == NULL) {
thr->interrupt_init = thr->interrupt_init - thr->interrupt_counter;
thr->heap->inst_count_interrupt += thr->interrupt_init;
DUK_DD(DUK_DDPRINT("debug test: updated interrupt count on exit to "
"user code, instruction counts: executor=%ld, interrupt=%ld",
(long) thr->heap->inst_count_exec, (long) thr->heap->inst_count_interrupt));
DUK_ASSERT(thr->heap->inst_count_exec == thr->heap->inst_count_interrupt);
}
#else
DUK_UNREF(thr);
DUK_UNREF(entry_curr_thread);
#endif
}
#endif
/*
* Arguments object creation.
*
* Creating arguments objects involves many small details, see E5 Section
* 10.6 for the specific requirements. Much of the arguments object exotic
* behavior is implemented in duk_hobject_props.c, and is enabled by the
* object flag DUK_HOBJECT_FLAG_EXOTIC_ARGUMENTS.
*/
DUK_LOCAL void duk__create_arguments_object(duk_hthread *thr,
duk_hobject *func,
duk_hobject *varenv,
duk_idx_t idx_argbase, /* idx of first argument on stack */
duk_idx_t num_stack_args) { /* num args starting from idx_argbase */
duk_context *ctx = (duk_context *) thr;
duk_hobject *arg; /* 'arguments' */
duk_hobject *formals; /* formals for 'func' (may be NULL if func is a C function) */
duk_idx_t i_arg;
duk_idx_t i_map;
duk_idx_t i_mappednames;
duk_idx_t i_formals;
duk_idx_t i_argbase;
duk_idx_t n_formals;
duk_idx_t idx;
duk_bool_t need_map;
DUK_DDD(DUK_DDDPRINT("creating arguments object for func=%!iO, varenv=%!iO, "
"idx_argbase=%ld, num_stack_args=%ld",
(duk_heaphdr *) func, (duk_heaphdr *) varenv,
(long) idx_argbase, (long) num_stack_args));
DUK_ASSERT(thr != NULL);
DUK_ASSERT(func != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_NONBOUND_FUNCTION(func));
DUK_ASSERT(varenv != NULL);
DUK_ASSERT(idx_argbase >= 0); /* assumed to bottom relative */
DUK_ASSERT(num_stack_args >= 0);
need_map = 0;
i_argbase = idx_argbase;
DUK_ASSERT(i_argbase >= 0);
duk_push_hobject(ctx, func);
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_FORMALS);
formals = duk_get_hobject(ctx, -1);
n_formals = 0;
if (formals) {
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_LENGTH);
n_formals = (duk_idx_t) duk_require_int(ctx, -1);
duk_pop(ctx);
}
duk_remove(ctx, -2); /* leave formals on stack for later use */
i_formals = duk_require_top_index(ctx);
DUK_ASSERT(n_formals >= 0);
DUK_ASSERT(formals != NULL || n_formals == 0);
DUK_DDD(DUK_DDDPRINT("func=%!O, formals=%!O, n_formals=%ld",
(duk_heaphdr *) func, (duk_heaphdr *) formals,
(long) n_formals));
/* [ ... formals ] */
/*
* Create required objects:
* - 'arguments' object: array-like, but not an array
* - 'map' object: internal object, tied to 'arguments'
* - 'mappedNames' object: temporary value used during construction
*/
i_arg = duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_FLAG_ARRAY_PART |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_ARGUMENTS),
DUK_BIDX_OBJECT_PROTOTYPE);
DUK_ASSERT(i_arg >= 0);
arg = duk_require_hobject(ctx, -1);
DUK_ASSERT(arg != NULL);
i_map = duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT),
-1); /* no prototype */
DUK_ASSERT(i_map >= 0);
i_mappednames = duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJECT),
-1); /* no prototype */
DUK_ASSERT(i_mappednames >= 0);
/* [ ... formals arguments map mappedNames ] */
DUK_DDD(DUK_DDDPRINT("created arguments related objects: "
"arguments at index %ld -> %!O "
"map at index %ld -> %!O "
"mappednames at index %ld -> %!O",
(long) i_arg, (duk_heaphdr *) duk_get_hobject(ctx, i_arg),
(long) i_map, (duk_heaphdr *) duk_get_hobject(ctx, i_map),
(long) i_mappednames, (duk_heaphdr *) duk_get_hobject(ctx, i_mappednames)));
/*
* Init arguments properties, map, etc.
*/
duk_push_int(ctx, num_stack_args);
duk_xdef_prop_stridx(ctx, i_arg, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_WC);
/*
* Init argument related properties
*/
/* step 11 */
idx = num_stack_args - 1;
while (idx >= 0) {
DUK_DDD(DUK_DDDPRINT("arg idx %ld, argbase=%ld, argidx=%ld",
(long) idx, (long) i_argbase, (long) (i_argbase + idx)));
DUK_DDD(DUK_DDDPRINT("define arguments[%ld]=arg", (long) idx));
duk_dup(ctx, i_argbase + idx);
duk_xdef_prop_index_wec(ctx, i_arg, (duk_uarridx_t) idx);
DUK_DDD(DUK_DDDPRINT("defined arguments[%ld]=arg", (long) idx));
/* step 11.c is relevant only if non-strict (checked in 11.c.ii) */
if (!DUK_HOBJECT_HAS_STRICT(func) && idx < n_formals) {
DUK_ASSERT(formals != NULL);
DUK_DDD(DUK_DDDPRINT("strict function, index within formals (%ld < %ld)",
(long) idx, (long) n_formals));
duk_get_prop_index(ctx, i_formals, idx);
DUK_ASSERT(duk_is_string(ctx, -1));
duk_dup(ctx, -1); /* [ ... name name ] */
if (!duk_has_prop(ctx, i_mappednames)) {
/* steps 11.c.ii.1 - 11.c.ii.4, but our internal book-keeping
* differs from the reference model
*/
/* [ ... name ] */
need_map = 1;
DUK_DDD(DUK_DDDPRINT("set mappednames[%s]=%ld",
(const char *) duk_get_string(ctx, -1),
(long) idx));
duk_dup(ctx, -1); /* name */
duk_push_uint(ctx, (duk_uint_t) idx); /* index */
duk_to_string(ctx, -1);
duk_xdef_prop_wec(ctx, i_mappednames); /* out of spec, must be configurable */
DUK_DDD(DUK_DDDPRINT("set map[%ld]=%s",
(long) idx,
duk_get_string(ctx, -1)));
duk_dup(ctx, -1); /* name */
duk_xdef_prop_index_wec(ctx, i_map, (duk_uarridx_t) idx); /* out of spec, must be configurable */
} else {
/* duk_has_prop() popped the second 'name' */
}
/* [ ... name ] */
duk_pop(ctx); /* pop 'name' */
}
idx--;
}
DUK_DDD(DUK_DDDPRINT("actual arguments processed"));
/* step 12 */
if (need_map) {
DUK_DDD(DUK_DDDPRINT("adding 'map' and 'varenv' to arguments object"));
/* should never happen for a strict callee */
DUK_ASSERT(!DUK_HOBJECT_HAS_STRICT(func));
duk_dup(ctx, i_map);
duk_xdef_prop_stridx(ctx, i_arg, DUK_STRIDX_INT_MAP, DUK_PROPDESC_FLAGS_NONE); /* out of spec, don't care */
/* The variable environment for magic variable bindings needs to be
* given by the caller and recorded in the arguments object.
*
* See E5 Section 10.6, the creation of setters/getters.
*
* The variable environment also provides access to the callee, so
* an explicit (internal) callee property is not needed.
*/
duk_push_hobject(ctx, varenv);
duk_xdef_prop_stridx(ctx, i_arg, DUK_STRIDX_INT_VARENV, DUK_PROPDESC_FLAGS_NONE); /* out of spec, don't care */
}
/* steps 13-14 */
if (DUK_HOBJECT_HAS_STRICT(func)) {
/* Callee/caller are throwers and are not deletable etc. They
* could be implemented as virtual properties, but currently
* there is no support for virtual properties which are accessors
* (only plain virtual properties). This would not be difficult
* to change in duk_hobject_props, but we can make the throwers
* normal, concrete properties just as easily.
*
* Note that the specification requires that the *same* thrower
* built-in object is used here! See E5 Section 10.6 main
* algoritm, step 14, and Section 13.2.3 which describes the
* thrower. See test case test-arguments-throwers.js.
*/
DUK_DDD(DUK_DDDPRINT("strict function, setting caller/callee to throwers"));
duk_xdef_prop_stridx_thrower(ctx, i_arg, DUK_STRIDX_CALLER, DUK_PROPDESC_FLAGS_NONE);
duk_xdef_prop_stridx_thrower(ctx, i_arg, DUK_STRIDX_CALLEE, DUK_PROPDESC_FLAGS_NONE);
} else {
DUK_DDD(DUK_DDDPRINT("non-strict function, setting callee to actual value"));
duk_push_hobject(ctx, func);
duk_xdef_prop_stridx(ctx, i_arg, DUK_STRIDX_CALLEE, DUK_PROPDESC_FLAGS_WC);
}
/* set exotic behavior only after we're done */
if (need_map) {
/* Exotic behaviors are only enabled for arguments objects
* which have a parameter map (see E5 Section 10.6 main
* algorithm, step 12).
*
* In particular, a non-strict arguments object with no
* mapped formals does *NOT* get exotic behavior, even
* for e.g. "caller" property. This seems counterintuitive
* but seems to be the case.
*/
/* cannot be strict (never mapped variables) */
DUK_ASSERT(!DUK_HOBJECT_HAS_STRICT(func));
DUK_DDD(DUK_DDDPRINT("enabling exotic behavior for arguments object"));
DUK_HOBJECT_SET_EXOTIC_ARGUMENTS(arg);
} else {
DUK_DDD(DUK_DDDPRINT("not enabling exotic behavior for arguments object"));
}
DUK_DDD(DUK_DDDPRINT("final arguments related objects: "
"arguments at index %ld -> %!O "
"map at index %ld -> %!O "
"mappednames at index %ld -> %!O",
(long) i_arg, (duk_heaphdr *) duk_get_hobject(ctx, i_arg),
(long) i_map, (duk_heaphdr *) duk_get_hobject(ctx, i_map),
(long) i_mappednames, (duk_heaphdr *) duk_get_hobject(ctx, i_mappednames)));
/* [ args(n) [crud] formals arguments map mappednames ] */
duk_pop_2(ctx);
duk_remove(ctx, -2);
/* [ args [crud] arguments ] */
}
/* Helper for creating the arguments object and adding it to the env record
* on top of the value stack. This helper has a very strict dependency on
* the shape of the input stack.
*/
DUK_LOCAL void duk__handle_createargs_for_call(duk_hthread *thr,
duk_hobject *func,
duk_hobject *env,
duk_idx_t num_stack_args) {
duk_context *ctx = (duk_context *) thr;
DUK_DDD(DUK_DDDPRINT("creating arguments object for function call"));
DUK_ASSERT(thr != NULL);
DUK_ASSERT(func != NULL);
DUK_ASSERT(env != NULL);
DUK_ASSERT(DUK_HOBJECT_HAS_CREATEARGS(func));
DUK_ASSERT(duk_get_top(ctx) >= num_stack_args + 1);
/* [ ... arg1 ... argN envobj ] */
duk__create_arguments_object(thr,
func,
env,
duk_get_top(ctx) - num_stack_args - 1, /* idx_argbase */
num_stack_args);
/* [ ... arg1 ... argN envobj argobj ] */
duk_xdef_prop_stridx(ctx,
-2,
DUK_STRIDX_LC_ARGUMENTS,
DUK_HOBJECT_HAS_STRICT(func) ? DUK_PROPDESC_FLAGS_E : /* strict: non-deletable, non-writable */
DUK_PROPDESC_FLAGS_WE); /* non-strict: non-deletable, writable */
/* [ ... arg1 ... argN envobj ] */
}
/*
* Helper for handling a "bound function" chain when a call is being made.
*
* Follows the bound function chain until a non-bound function is found.
* Prepends the bound arguments to the value stack (at idx_func + 2),
* updating 'num_stack_args' in the process. The 'this' binding is also
* updated if necessary (at idx_func + 1). Note that for constructor calls
* the 'this' binding is never updated by [[BoundThis]].
*
* XXX: bound function chains could be collapsed at bound function creation
* time so that each bound function would point directly to a non-bound
* function. This would make call time handling much easier.
*/
DUK_LOCAL void duk__handle_bound_chain_for_call(duk_hthread *thr,
duk_idx_t idx_func,
duk_idx_t *p_num_stack_args, /* may be changed by call */
duk_bool_t is_constructor_call) {
duk_context *ctx = (duk_context *) thr;
duk_idx_t num_stack_args;
duk_tval *tv_func;
duk_hobject *func;
duk_uint_t sanity;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(p_num_stack_args != NULL);
/* On entry, item at idx_func is a bound, non-lightweight function,
* but we don't rely on that below.
*/
num_stack_args = *p_num_stack_args;
sanity = DUK_HOBJECT_BOUND_CHAIN_SANITY;
do {
duk_idx_t i, len;
tv_func = duk_require_tval(ctx, idx_func);
DUK_ASSERT(tv_func != NULL);
if (DUK_TVAL_IS_LIGHTFUNC(tv_func)) {
/* Lightweight function: never bound, so terminate. */
break;
} else if (DUK_TVAL_IS_OBJECT(tv_func)) {
func = DUK_TVAL_GET_OBJECT(tv_func);
if (!DUK_HOBJECT_HAS_BOUND(func)) {
/* Normal non-bound function. */
break;
}
} else {
/* Function.prototype.bind() should never let this happen,
* ugly error message is enough.
*/
DUK_ERROR_INTERNAL_DEFMSG(thr);
}
DUK_ASSERT(DUK_TVAL_GET_OBJECT(tv_func) != NULL);
/* XXX: this could be more compact by accessing the internal properties
* directly as own properties (they cannot be inherited, and are not
* externally visible).
*/
DUK_DDD(DUK_DDDPRINT("bound function encountered, ptr=%p, num_stack_args=%ld: %!T",
(void *) DUK_TVAL_GET_OBJECT(tv_func), (long) num_stack_args, tv_func));
/* [ ... func this arg1 ... argN ] */
if (is_constructor_call) {
/* See: tests/ecmascript/test-spec-bound-constructor.js */
DUK_DDD(DUK_DDDPRINT("constructor call: don't update this binding"));
} else {
duk_get_prop_stridx(ctx, idx_func, DUK_STRIDX_INT_THIS);
duk_replace(ctx, idx_func + 1); /* idx_this = idx_func + 1 */
}
/* [ ... func this arg1 ... argN ] */
/* XXX: duk_get_length? */
duk_get_prop_stridx(ctx, idx_func, DUK_STRIDX_INT_ARGS); /* -> [ ... func this arg1 ... argN _Args ] */
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_LENGTH); /* -> [ ... func this arg1 ... argN _Args length ] */
len = (duk_idx_t) duk_require_int(ctx, -1);
duk_pop(ctx);
for (i = 0; i < len; i++) {
/* XXX: very slow - better to bulk allocate a gap, and copy
* from args_array directly (we know it has a compact array
* part, etc).
*/
/* [ ... func this <some bound args> arg1 ... argN _Args ] */
duk_get_prop_index(ctx, -1, i);
duk_insert(ctx, idx_func + 2 + i); /* idx_args = idx_func + 2 */
}
num_stack_args += len; /* must be updated to work properly (e.g. creation of 'arguments') */
duk_pop(ctx);
/* [ ... func this <bound args> arg1 ... argN ] */
duk_get_prop_stridx(ctx, idx_func, DUK_STRIDX_INT_TARGET);
duk_replace(ctx, idx_func); /* replace in stack */
DUK_DDD(DUK_DDDPRINT("bound function handled, num_stack_args=%ld, idx_func=%ld, curr func=%!T",
(long) num_stack_args, (long) idx_func, duk_get_tval(ctx, idx_func)));
} while (--sanity > 0);
if (sanity == 0) {
DUK_ERROR_RANGE(thr, DUK_STR_BOUND_CHAIN_LIMIT);
}
DUK_DDD(DUK_DDDPRINT("final non-bound function is: %!T", duk_get_tval(ctx, idx_func)));
#if defined(DUK_USE_ASSERTIONS)
tv_func = duk_require_tval(ctx, idx_func);
DUK_ASSERT(DUK_TVAL_IS_LIGHTFUNC(tv_func) || DUK_TVAL_IS_OBJECT(tv_func));
if (DUK_TVAL_IS_OBJECT(tv_func)) {
func = DUK_TVAL_GET_OBJECT(tv_func);
DUK_ASSERT(func != NULL);
DUK_ASSERT(!DUK_HOBJECT_HAS_BOUND(func));
DUK_ASSERT(DUK_HOBJECT_HAS_COMPILEDFUNCTION(func) ||
DUK_HOBJECT_HAS_NATIVEFUNCTION(func));
}
#endif
/* write back */
*p_num_stack_args = num_stack_args;
}
/*
* Helper for setting up var_env and lex_env of an activation,
* assuming it does NOT have the DUK_HOBJECT_FLAG_NEWENV flag.
*/
DUK_LOCAL void duk__handle_oldenv_for_call(duk_hthread *thr,
duk_hobject *func,
duk_activation *act) {
duk_tval *tv;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(func != NULL);
DUK_ASSERT(act != NULL);
DUK_ASSERT(!DUK_HOBJECT_HAS_NEWENV(func));
DUK_ASSERT(!DUK_HOBJECT_HAS_CREATEARGS(func));
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, func, DUK_HTHREAD_STRING_INT_LEXENV(thr));
if (tv) {
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv));
DUK_ASSERT(DUK_HOBJECT_IS_ENV(DUK_TVAL_GET_OBJECT(tv)));
act->lex_env = DUK_TVAL_GET_OBJECT(tv);
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, func, DUK_HTHREAD_STRING_INT_VARENV(thr));
if (tv) {
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv));
DUK_ASSERT(DUK_HOBJECT_IS_ENV(DUK_TVAL_GET_OBJECT(tv)));
act->var_env = DUK_TVAL_GET_OBJECT(tv);
} else {
act->var_env = act->lex_env;
}
} else {
act->lex_env = thr->builtins[DUK_BIDX_GLOBAL_ENV];
act->var_env = act->lex_env;
}
DUK_HOBJECT_INCREF_ALLOWNULL(thr, act->lex_env);
DUK_HOBJECT_INCREF_ALLOWNULL(thr, act->var_env);
}
/*
* Helper for updating callee 'caller' property.
*/
#if defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY)
DUK_LOCAL void duk__update_func_caller_prop(duk_hthread *thr, duk_hobject *func) {
duk_tval *tv_caller;
duk_hobject *h_tmp;
duk_activation *act_callee;
duk_activation *act_caller;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(func != NULL);
DUK_ASSERT(!DUK_HOBJECT_HAS_BOUND(func)); /* bound chain resolved */
DUK_ASSERT(thr->callstack_top >= 1);
if (DUK_HOBJECT_HAS_STRICT(func)) {
/* Strict functions don't get their 'caller' updated. */
return;
}
act_callee = thr->callstack + thr->callstack_top - 1;
act_caller = (thr->callstack_top >= 2 ? act_callee - 1 : NULL);
/* XXX: check .caller writability? */
/* Backup 'caller' property and update its value. */
tv_caller = duk_hobject_find_existing_entry_tval_ptr(thr->heap, func, DUK_HTHREAD_STRING_CALLER(thr));
if (tv_caller) {
/* If caller is global/eval code, 'caller' should be set to
* 'null'.
*
* XXX: there is no exotic flag to infer this correctly now.
* The NEWENV flag is used now which works as intended for
* everything (global code, non-strict eval code, and functions)
* except strict eval code. Bound functions are never an issue
* because 'func' has been resolved to a non-bound function.
*/
if (act_caller) {
/* act_caller->func may be NULL in some finalization cases,
* just treat like we don't know the caller.
*/
if (act_caller->func && !DUK_HOBJECT_HAS_NEWENV(act_caller->func)) {
/* Setting to NULL causes 'caller' to be set to
* 'null' as desired.
*/
act_caller = NULL;
}
}
if (DUK_TVAL_IS_OBJECT(tv_caller)) {
h_tmp = DUK_TVAL_GET_OBJECT(tv_caller);
DUK_ASSERT(h_tmp != NULL);
act_callee->prev_caller = h_tmp;
/* Previous value doesn't need refcount changes because its ownership
* is transferred to prev_caller.
*/
if (act_caller) {
DUK_ASSERT(act_caller->func != NULL);
DUK_TVAL_SET_OBJECT(tv_caller, act_caller->func);
DUK_TVAL_INCREF(thr, tv_caller);
} else {
DUK_TVAL_SET_NULL(tv_caller); /* no incref */
}
} else {
/* 'caller' must only take on 'null' or function value */
DUK_ASSERT(!DUK_TVAL_IS_HEAP_ALLOCATED(tv_caller));
DUK_ASSERT(act_callee->prev_caller == NULL);
if (act_caller && act_caller->func) {
/* Tolerate act_caller->func == NULL which happens in
* some finalization cases; treat like unknown caller.
*/
DUK_TVAL_SET_OBJECT(tv_caller, act_caller->func);
DUK_TVAL_INCREF(thr, tv_caller);
} else {
DUK_TVAL_SET_NULL(tv_caller); /* no incref */
}
}
}
}
#endif /* DUK_USE_NONSTD_FUNC_CALLER_PROPERTY */
/*
* Determine the effective 'this' binding and coerce the current value
* on the valstack to the effective one (in-place, at idx_this).
*
* The current this value in the valstack (at idx_this) represents either:
* - the caller's requested 'this' binding; or
* - a 'this' binding accumulated from the bound function chain
*
* The final 'this' binding for the target function may still be
* different, and is determined as described in E5 Section 10.4.3.
*
* For global and eval code (E5 Sections 10.4.1 and 10.4.2), we assume
* that the caller has provided the correct 'this' binding explicitly
* when calling, i.e.:
*
* - global code: this=global object
* - direct eval: this=copy from eval() caller's this binding
* - other eval: this=global object
*
* Note: this function may cause a recursive function call with arbitrary
* side effects, because ToObject() may be called.
*/
DUK_LOCAL void duk__coerce_effective_this_binding(duk_hthread *thr,
duk_hobject *func,
duk_idx_t idx_this) {
duk_context *ctx = (duk_context *) thr;
duk_tval *tv_this;
duk_hobject *obj_global;
if (func == NULL || DUK_HOBJECT_HAS_STRICT(func)) {
/* Lightfuncs are always considered strict. */
DUK_DDD(DUK_DDDPRINT("this binding: strict -> use directly"));
return;
}
/* XXX: byte offset */
tv_this = thr->valstack_bottom + idx_this;
switch (DUK_TVAL_GET_TAG(tv_this)) {
case DUK_TAG_OBJECT:
case DUK_TAG_LIGHTFUNC: /* lightfuncs are treated like objects and not coerced */
DUK_DDD(DUK_DDDPRINT("this binding: non-strict, object -> use directly"));
break;
case DUK_TAG_UNDEFINED:
case DUK_TAG_NULL:
DUK_DDD(DUK_DDDPRINT("this binding: non-strict, undefined/null -> use global object"));
obj_global = thr->builtins[DUK_BIDX_GLOBAL];
/* XXX: avoid this check somehow */
if (DUK_LIKELY(obj_global != NULL)) {
DUK_ASSERT(!DUK_TVAL_IS_HEAP_ALLOCATED(tv_this)); /* no need to decref previous value */
DUK_TVAL_SET_OBJECT(tv_this, obj_global);
DUK_HOBJECT_INCREF(thr, obj_global);
} else {
/* This may only happen if built-ins are being "torn down".
* This behavior is out of specification scope.
*/
DUK_D(DUK_DPRINT("this binding: wanted to use global object, but it is NULL -> using undefined instead"));
DUK_ASSERT(!DUK_TVAL_IS_HEAP_ALLOCATED(tv_this)); /* no need to decref previous value */
DUK_TVAL_SET_UNDEFINED(tv_this); /* nothing to incref */
}
break;
default:
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv_this));
DUK_DDD(DUK_DDDPRINT("this binding: non-strict, not object/undefined/null -> use ToObject(value)"));
duk_to_object(ctx, idx_this); /* may have side effects */
break;
}
}
/*
* Shared helper for non-bound func lookup.
*
* Returns duk_hobject * to the final non-bound function (NULL for lightfunc).
*/
DUK_LOCAL duk_hobject *duk__nonbound_func_lookup(duk_context *ctx,
duk_idx_t idx_func,
duk_idx_t *out_num_stack_args,
duk_tval **out_tv_func,
duk_small_uint_t call_flags) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_tval *tv_func;
duk_hobject *func;
for (;;) {
/* Use loop to minimize code size of relookup after bound function case */
tv_func = DUK_GET_TVAL_POSIDX(ctx, idx_func);
DUK_ASSERT(tv_func != NULL);
if (DUK_TVAL_IS_OBJECT(tv_func)) {
func = DUK_TVAL_GET_OBJECT(tv_func);
if (!DUK_HOBJECT_IS_CALLABLE(func)) {
goto not_callable_error;
}
if (DUK_HOBJECT_HAS_BOUND(func)) {
duk__handle_bound_chain_for_call(thr, idx_func, out_num_stack_args, call_flags & DUK_CALL_FLAG_CONSTRUCTOR_CALL);
/* The final object may be a normal function or a lightfunc.
* We need to re-lookup tv_func because it may have changed
* (also value stack may have been resized). Loop again to
* do that; we're guaranteed not to come here again.
*/
DUK_ASSERT(DUK_TVAL_IS_OBJECT(duk_require_tval(ctx, idx_func)) ||
DUK_TVAL_IS_LIGHTFUNC(duk_require_tval(ctx, idx_func)));
continue;
}
} else if (DUK_TVAL_IS_LIGHTFUNC(tv_func)) {
func = NULL;
} else {
goto not_callable_error;
}
break;
}
DUK_ASSERT((DUK_TVAL_IS_OBJECT(tv_func) && DUK_HOBJECT_IS_CALLABLE(DUK_TVAL_GET_OBJECT(tv_func))) ||
DUK_TVAL_IS_LIGHTFUNC(tv_func));
DUK_ASSERT(func == NULL || !DUK_HOBJECT_HAS_BOUND(func));
DUK_ASSERT(func == NULL || (DUK_HOBJECT_IS_COMPILEDFUNCTION(func) ||
DUK_HOBJECT_IS_NATIVEFUNCTION(func)));
*out_tv_func = tv_func;
return func;
not_callable_error:
DUK_ASSERT(tv_func != NULL);
#if defined(DUK_USE_PARANOID_ERRORS)
DUK_ERROR_TYPE(thr, DUK_STR_NOT_CALLABLE);
#else
DUK_ERROR_FMT1(thr, DUK_ERR_TYPE_ERROR, "%s not callable", duk_push_string_tval_readable(ctx, tv_func));
#endif
DUK_UNREACHABLE();
return NULL; /* never executed */
}
/*
* Value stack resize and stack top adjustment helper.
*
* XXX: This should all be merged to duk_valstack_resize_raw().
*/
DUK_LOCAL void duk__adjust_valstack_and_top(duk_hthread *thr,
duk_idx_t num_stack_args,
duk_idx_t idx_args,
duk_idx_t nregs,
duk_idx_t nargs,
duk_hobject *func) {
duk_context *ctx = (duk_context *) thr;
duk_size_t vs_min_size;
duk_bool_t adjusted_top = 0;
vs_min_size = (thr->valstack_bottom - thr->valstack) + /* bottom of current func */
idx_args; /* bottom of new func */
if (nregs >= 0) {
DUK_ASSERT(nargs >= 0);
DUK_ASSERT(nregs >= nargs);
vs_min_size += nregs;
} else {
/* 'func' wants stack "as is" */
vs_min_size += num_stack_args; /* num entries of new func at entry */
}
if (func == NULL || DUK_HOBJECT_IS_NATIVEFUNCTION(func)) {
vs_min_size += DUK_VALSTACK_API_ENTRY_MINIMUM; /* Duktape/C API guaranteed entries (on top of args) */
}
vs_min_size += DUK_VALSTACK_INTERNAL_EXTRA; /* + spare */
/* XXX: We can't resize the value stack to a size smaller than the
* current top, so the order of the resize and adjusting the stack
* top depends on the current vs. final size of the value stack.
* The operations could be combined to avoid this, but the proper
* fix is to only grow the value stack on a function call, and only
* shrink it (without throwing if the shrink fails) on function
* return.
*/
if (vs_min_size < (duk_size_t) (thr->valstack_top - thr->valstack)) {
DUK_DDD(DUK_DDDPRINT(("final size smaller, set top before resize")));
DUK_ASSERT(nregs >= 0); /* can't happen when keeping current stack size */
duk_set_top(ctx, idx_args + nargs); /* clamp anything above nargs */
duk_set_top(ctx, idx_args + nregs); /* extend with undefined */
adjusted_top = 1;
}
(void) duk_valstack_resize_raw((duk_context *) thr,
vs_min_size,
DUK_VSRESIZE_FLAG_SHRINK | /* flags */
0 /* no compact */ |
DUK_VSRESIZE_FLAG_THROW);
if (!adjusted_top) {
if (nregs >= 0) {
DUK_ASSERT(nregs >= nargs);
duk_set_top(ctx, idx_args + nargs); /* clamp anything above nargs */
duk_set_top(ctx, idx_args + nregs); /* extend with undefined */
}
}
}
/*
* Manipulate value stack so that exactly 'num_stack_rets' return
* values are at 'idx_retbase' in every case, assuming there are
* 'rc' return values on top of stack.
*
* This is a bit tricky, because the called C function operates in
* the same activation record and may have e.g. popped the stack
* empty (below idx_retbase).
*/
DUK_LOCAL void duk__safe_call_adjust_valstack(duk_hthread *thr, duk_idx_t idx_retbase, duk_idx_t num_stack_rets, duk_idx_t num_actual_rets) {
duk_context *ctx = (duk_context *) thr;
duk_idx_t idx_rcbase;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(idx_retbase >= 0);
DUK_ASSERT(num_stack_rets >= 0);
DUK_ASSERT(num_actual_rets >= 0);
idx_rcbase = duk_get_top(ctx) - num_actual_rets; /* base of known return values */
DUK_DDD(DUK_DDDPRINT("adjust valstack after func call: "
"num_stack_rets=%ld, num_actual_rets=%ld, stack_top=%ld, idx_retbase=%ld, idx_rcbase=%ld",
(long) num_stack_rets, (long) num_actual_rets, (long) duk_get_top(ctx),
(long) idx_retbase, (long) idx_rcbase));
DUK_ASSERT(idx_rcbase >= 0); /* caller must check */
/* Ensure space for final configuration (idx_retbase + num_stack_rets)
* and intermediate configurations.
*/
duk_require_stack_top(ctx,
(idx_rcbase > idx_retbase ? idx_rcbase : idx_retbase) +
num_stack_rets);
/* Chop extra retvals away / extend with undefined. */
duk_set_top(ctx, idx_rcbase + num_stack_rets);
if (idx_rcbase >= idx_retbase) {
duk_idx_t count = idx_rcbase - idx_retbase;
duk_idx_t i;
DUK_DDD(DUK_DDDPRINT("elements at/after idx_retbase have enough to cover func retvals "
"(idx_retbase=%ld, idx_rcbase=%ld)", (long) idx_retbase, (long) idx_rcbase));
/* nuke values at idx_retbase to get the first retval (initially
* at idx_rcbase) to idx_retbase
*/
DUK_ASSERT(count >= 0);
for (i = 0; i < count; i++) {
/* XXX: inefficient; block remove primitive */
duk_remove(ctx, idx_retbase);
}
} else {
duk_idx_t count = idx_retbase - idx_rcbase;
duk_idx_t i;
DUK_DDD(DUK_DDDPRINT("not enough elements at/after idx_retbase to cover func retvals "
"(idx_retbase=%ld, idx_rcbase=%ld)", (long) idx_retbase, (long) idx_rcbase));
/* insert 'undefined' values at idx_rcbase to get the
* return values to idx_retbase
*/
DUK_ASSERT(count > 0);
for (i = 0; i < count; i++) {
/* XXX: inefficient; block insert primitive */
duk_push_undefined(ctx);
duk_insert(ctx, idx_rcbase);
}
}
}
/*
* Misc shared helpers.
*/
/* Get valstack index for the func argument or throw if insane stack. */
DUK_LOCAL duk_idx_t duk__get_idx_func(duk_hthread *thr, duk_idx_t num_stack_args) {
duk_size_t off_stack_top;
duk_size_t off_stack_args;
duk_size_t off_stack_all;
duk_idx_t idx_func; /* valstack index of 'func' and retval (relative to entry valstack_bottom) */
/* Argument validation and func/args offset. */
off_stack_top = (duk_size_t) ((duk_uint8_t *) thr->valstack_top - (duk_uint8_t *) thr->valstack_bottom);
off_stack_args = (duk_size_t) ((duk_size_t) num_stack_args * sizeof(duk_tval));
off_stack_all = off_stack_args + 2 * sizeof(duk_tval);
if (DUK_UNLIKELY(off_stack_all > off_stack_top)) {
/* Since stack indices are not reliable, we can't do anything useful
* here. Invoke the existing setjmp catcher, or if it doesn't exist,
* call the fatal error handler.
*/
DUK_ERROR_API(thr, DUK_STR_INVALID_CALL_ARGS);
return 0;
}
idx_func = (duk_idx_t) ((off_stack_top - off_stack_all) / sizeof(duk_tval));
return idx_func;
}
/*
* duk_handle_call_protected() and duk_handle_call_unprotected():
* call into a Duktape/C or an Ecmascript function from any state.
*
* Input stack (thr):
*
* [ func this arg1 ... argN ]
*
* Output stack (thr):
*
* [ retval ] (DUK_EXEC_SUCCESS)
* [ errobj ] (DUK_EXEC_ERROR (normal error), protected call)
*
* Even when executing a protected call an error may be thrown in rare cases
* such as an insane num_stack_args argument. If there is no catchpoint for
* such errors, the fatal error handler is called.
*
* The error handling path should be error free, even for out-of-memory
* errors, to ensure safe sandboxing. (As of Duktape 1.4.0 this is not
* yet the case, see XXX notes below.)
*/
DUK_INTERNAL duk_int_t duk_handle_call_protected(duk_hthread *thr,
duk_idx_t num_stack_args,
duk_small_uint_t call_flags) {
duk_context *ctx;
duk_size_t entry_valstack_bottom_index;
duk_size_t entry_valstack_end;
duk_size_t entry_callstack_top;
duk_size_t entry_catchstack_top;
duk_int_t entry_call_recursion_depth;
duk_hthread *entry_curr_thread;
duk_uint_fast8_t entry_thread_state;
duk_instr_t **entry_ptr_curr_pc;
duk_jmpbuf *old_jmpbuf_ptr = NULL;
duk_jmpbuf our_jmpbuf;
duk_idx_t idx_func; /* valstack index of 'func' and retval (relative to entry valstack_bottom) */
/* XXX: Multiple tv_func lookups are now avoided by making a local
* copy of tv_func. Another approach would be to compute an offset
* for tv_func from valstack bottom and recomputing the tv_func
* pointer quickly as valstack + offset instead of calling duk_get_tval().
*/
ctx = (duk_context *) thr;
DUK_UNREF(ctx);
DUK_ASSERT(thr != NULL);
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(num_stack_args >= 0);
/* XXX: currently NULL allocations are not supported; remove if later allowed */
DUK_ASSERT(thr->valstack != NULL);
DUK_ASSERT(thr->callstack != NULL);
DUK_ASSERT(thr->catchstack != NULL);
/* Argument validation and func/args offset. */
idx_func = duk__get_idx_func(thr, num_stack_args);
/* Preliminaries, required by setjmp() handler. Must be careful not
* to throw an unintended error here.
*/
entry_valstack_bottom_index = (duk_size_t) (thr->valstack_bottom - thr->valstack);
#if defined(DUK_USE_PREFER_SIZE)
entry_valstack_end = (duk_size_t) (thr->valstack_end - thr->valstack);
#else
DUK_ASSERT((duk_size_t) (thr->valstack_end - thr->valstack) == thr->valstack_size);
entry_valstack_end = thr->valstack_size;
#endif
entry_callstack_top = thr->callstack_top;
entry_catchstack_top = thr->catchstack_top;
entry_call_recursion_depth = thr->heap->call_recursion_depth;
entry_curr_thread = thr->heap->curr_thread; /* Note: may be NULL if first call */
entry_thread_state = thr->state;
entry_ptr_curr_pc = thr->ptr_curr_pc; /* may be NULL */
DUK_DD(DUK_DDPRINT("duk_handle_call_protected: thr=%p, num_stack_args=%ld, "
"call_flags=0x%08lx (ignorerec=%ld, constructor=%ld), "
"valstack_top=%ld, idx_func=%ld, idx_args=%ld, rec_depth=%ld/%ld, "
"entry_valstack_bottom_index=%ld, entry_callstack_top=%ld, entry_catchstack_top=%ld, "
"entry_call_recursion_depth=%ld, entry_curr_thread=%p, entry_thread_state=%ld",
(void *) thr,
(long) num_stack_args,
(unsigned long) call_flags,
(long) ((call_flags & DUK_CALL_FLAG_IGNORE_RECLIMIT) != 0 ? 1 : 0),
(long) ((call_flags & DUK_CALL_FLAG_CONSTRUCTOR_CALL) != 0 ? 1 : 0),
(long) duk_get_top(ctx),
(long) idx_func,
(long) (idx_func + 2),
(long) thr->heap->call_recursion_depth,
(long) thr->heap->call_recursion_limit,
(long) entry_valstack_bottom_index,
(long) entry_callstack_top,
(long) entry_catchstack_top,
(long) entry_call_recursion_depth,
(void *) entry_curr_thread,
(long) entry_thread_state));
old_jmpbuf_ptr = thr->heap->lj.jmpbuf_ptr;
thr->heap->lj.jmpbuf_ptr = &our_jmpbuf;
#if defined(DUK_USE_CPP_EXCEPTIONS)
try {
#else
DUK_ASSERT(thr->heap->lj.jmpbuf_ptr == &our_jmpbuf);
if (DUK_SETJMP(our_jmpbuf.jb) == 0) {
#endif
/* Call handling and success path. Success path exit cleans
* up almost all state.
*/
duk__handle_call_inner(thr, num_stack_args, call_flags, idx_func);
/* Success path handles */
DUK_ASSERT(thr->heap->call_recursion_depth == entry_call_recursion_depth);
DUK_ASSERT(thr->ptr_curr_pc == entry_ptr_curr_pc);
/* Longjmp state is kept clean in success path */
DUK_ASSERT(thr->heap->lj.type == DUK_LJ_TYPE_UNKNOWN);
DUK_ASSERT(thr->heap->lj.iserror == 0);
DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(&thr->heap->lj.value1));
DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(&thr->heap->lj.value2));
thr->heap->lj.jmpbuf_ptr = old_jmpbuf_ptr;
return DUK_EXEC_SUCCESS;
#if defined(DUK_USE_CPP_EXCEPTIONS)
} catch (duk_internal_exception &exc) {
#else
} else {
#endif
/* Error; error value is in heap->lj.value1. */
#if defined(DUK_USE_CPP_EXCEPTIONS)
DUK_UNREF(exc);
#endif
duk__handle_call_error(thr,
entry_valstack_bottom_index,
entry_valstack_end,
entry_catchstack_top,
entry_callstack_top,
entry_call_recursion_depth,
entry_curr_thread,
entry_thread_state,
entry_ptr_curr_pc,
idx_func,
old_jmpbuf_ptr);
/* Longjmp state is cleaned up by error handling */
DUK_ASSERT(thr->heap->lj.type == DUK_LJ_TYPE_UNKNOWN);
DUK_ASSERT(thr->heap->lj.iserror == 0);
DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(&thr->heap->lj.value1));
DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(&thr->heap->lj.value2));
return DUK_EXEC_ERROR;
}
#if defined(DUK_USE_CPP_EXCEPTIONS)
catch (std::exception &exc) {
const char *what = exc.what();
if (!what) {
what = "unknown";
}
DUK_D(DUK_DPRINT("unexpected c++ std::exception (perhaps thrown by user code)"));
try {
DUK_ERROR_FMT1(thr, DUK_ERR_API_ERROR, "caught invalid c++ std::exception '%s' (perhaps thrown by user code)", what);
} catch (duk_internal_exception exc) {
DUK_D(DUK_DPRINT("caught api error thrown from unexpected c++ std::exception"));
DUK_UNREF(exc);
duk__handle_call_error(thr,
entry_valstack_bottom_index,
entry_valstack_end,
entry_catchstack_top,
entry_callstack_top,
entry_call_recursion_depth,
entry_curr_thread,
entry_thread_state,
entry_ptr_curr_pc,
idx_func,
old_jmpbuf_ptr);
return DUK_EXEC_ERROR;
}
} catch (...) {
DUK_D(DUK_DPRINT("unexpected c++ exception (perhaps thrown by user code)"));
try {
DUK_ERROR_API(thr, "caught invalid c++ exception (perhaps thrown by user code)");
} catch (duk_internal_exception exc) {
DUK_D(DUK_DPRINT("caught api error thrown from unexpected c++ exception"));
DUK_UNREF(exc);
duk__handle_call_error(thr,
entry_valstack_bottom_index,
entry_valstack_end,
entry_catchstack_top,
entry_callstack_top,
entry_call_recursion_depth,
entry_curr_thread,
entry_thread_state,
entry_ptr_curr_pc,
idx_func,
old_jmpbuf_ptr);
return DUK_EXEC_ERROR;
}
}
#endif
}
DUK_INTERNAL void duk_handle_call_unprotected(duk_hthread *thr,
duk_idx_t num_stack_args,
duk_small_uint_t call_flags) {
duk_idx_t idx_func; /* valstack index of 'func' and retval (relative to entry valstack_bottom) */
/* Argument validation and func/args offset. */
idx_func = duk__get_idx_func(thr, num_stack_args);
duk__handle_call_inner(thr, num_stack_args, call_flags, idx_func);
}
DUK_LOCAL void duk__handle_call_inner(duk_hthread *thr,
duk_idx_t num_stack_args,
duk_small_uint_t call_flags,
duk_idx_t idx_func) {
duk_context *ctx;
duk_size_t entry_valstack_bottom_index;
duk_size_t entry_valstack_end;
duk_size_t entry_callstack_top;
duk_size_t entry_catchstack_top;
duk_int_t entry_call_recursion_depth;
duk_hthread *entry_curr_thread;
duk_uint_fast8_t entry_thread_state;
duk_instr_t **entry_ptr_curr_pc;
duk_idx_t nargs; /* # argument registers target function wants (< 0 => "as is") */
duk_idx_t nregs; /* # total registers target function wants on entry (< 0 => "as is") */
duk_hobject *func; /* 'func' on stack (borrowed reference) */
duk_tval *tv_func; /* duk_tval ptr for 'func' on stack (borrowed reference) or tv_func_copy */
duk_tval tv_func_copy; /* to avoid relookups */
duk_activation *act;
duk_hobject *env;
duk_ret_t rc;
ctx = (duk_context *) thr;
DUK_ASSERT(thr != NULL);
DUK_ASSERT_CTX_VALID(ctx);
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(num_stack_args >= 0);
/* XXX: currently NULL allocations are not supported; remove if later allowed */
DUK_ASSERT(thr->valstack != NULL);
DUK_ASSERT(thr->callstack != NULL);
DUK_ASSERT(thr->catchstack != NULL);
DUK_DD(DUK_DDPRINT("duk__handle_call_inner: num_stack_args=%ld, call_flags=0x%08lx, top=%ld",
(long) num_stack_args, (long) call_flags, (long) duk_get_top(ctx)));
/*
* Store entry state.
*/
entry_valstack_bottom_index = (duk_size_t) (thr->valstack_bottom - thr->valstack);
#if defined(DUK_USE_PREFER_SIZE)
entry_valstack_end = (duk_size_t) (thr->valstack_end - thr->valstack);
#else
DUK_ASSERT((duk_size_t) (thr->valstack_end - thr->valstack) == thr->valstack_size);
entry_valstack_end = thr->valstack_size;
#endif
entry_callstack_top = thr->callstack_top;
entry_catchstack_top = thr->catchstack_top;
entry_call_recursion_depth = thr->heap->call_recursion_depth;
entry_curr_thread = thr->heap->curr_thread; /* Note: may be NULL if first call */
entry_thread_state = thr->state;
entry_ptr_curr_pc = thr->ptr_curr_pc; /* may be NULL */
/* If thr->ptr_curr_pc is set, sync curr_pc to act->pc. Then NULL
* thr->ptr_curr_pc so that it's not accidentally used with an incorrect
* activation when side effects occur.
*/
duk_hthread_sync_and_null_currpc(thr);
DUK_DD(DUK_DDPRINT("duk__handle_call_inner: thr=%p, num_stack_args=%ld, "
"call_flags=0x%08lx (ignorerec=%ld, constructor=%ld), "
"valstack_top=%ld, idx_func=%ld, idx_args=%ld, rec_depth=%ld/%ld, "
"entry_valstack_bottom_index=%ld, entry_callstack_top=%ld, entry_catchstack_top=%ld, "
"entry_call_recursion_depth=%ld, entry_curr_thread=%p, entry_thread_state=%ld",
(void *) thr,
(long) num_stack_args,
(unsigned long) call_flags,
(long) ((call_flags & DUK_CALL_FLAG_IGNORE_RECLIMIT) != 0 ? 1 : 0),
(long) ((call_flags & DUK_CALL_FLAG_CONSTRUCTOR_CALL) != 0 ? 1 : 0),
(long) duk_get_top(ctx),
(long) idx_func,
(long) (idx_func + 2),
(long) thr->heap->call_recursion_depth,
(long) thr->heap->call_recursion_limit,
(long) entry_valstack_bottom_index,
(long) entry_callstack_top,
(long) entry_catchstack_top,
(long) entry_call_recursion_depth,
(void *) entry_curr_thread,
(long) entry_thread_state));
/*
* Thread state check and book-keeping.
*/
if (thr == thr->heap->curr_thread) {
/* same thread */
if (thr->state != DUK_HTHREAD_STATE_RUNNING) {
/* should actually never happen, but check anyway */
goto thread_state_error;
}
} else {
/* different thread */
DUK_ASSERT(thr->heap->curr_thread == NULL ||
thr->heap->curr_thread->state == DUK_HTHREAD_STATE_RUNNING);
if (thr->state != DUK_HTHREAD_STATE_INACTIVE) {
goto thread_state_error;
}
DUK_HEAP_SWITCH_THREAD(thr->heap, thr);
thr->state = DUK_HTHREAD_STATE_RUNNING;
/* Note: multiple threads may be simultaneously in the RUNNING
* state, but not in the same "resume chain".
*/
}
DUK_ASSERT(thr->heap->curr_thread == thr);
DUK_ASSERT(thr->state == DUK_HTHREAD_STATE_RUNNING);
/*
* C call recursion depth check, which provides a reasonable upper
* bound on maximum C stack size (arbitrary C stack growth is only
* possible by recursive handle_call / handle_safe_call calls).
*/
/* XXX: remove DUK_CALL_FLAG_IGNORE_RECLIMIT flag: there's now the
* reclimit bump?
*/
DUK_ASSERT(thr->heap->call_recursion_depth >= 0);
DUK_ASSERT(thr->heap->call_recursion_depth <= thr->heap->call_recursion_limit);
if (call_flags & DUK_CALL_FLAG_IGNORE_RECLIMIT) {
DUK_DD(DUK_DDPRINT("ignoring reclimit for this call (probably an errhandler call)"));
} else {
if (thr->heap->call_recursion_depth >= thr->heap->call_recursion_limit) {
/* XXX: error message is a bit misleading: we reached a recursion
* limit which is also essentially the same as a C callstack limit
* (except perhaps with some relaxed threading assumptions).
*/
DUK_ERROR_RANGE(thr, DUK_STR_C_CALLSTACK_LIMIT);
}
thr->heap->call_recursion_depth++;
}
/*
* Check the function type, handle bound function chains, and prepare
* parameters for the rest of the call handling. Also figure out the
* effective 'this' binding, which replaces the current value at
* idx_func + 1.
*
* If the target function is a 'bound' one, follow the chain of 'bound'
* functions until a non-bound function is found. During this process,
* bound arguments are 'prepended' to existing ones, and the "this"
* binding is overridden. See E5 Section 15.3.4.5.1.
*
* Lightfunc detection happens here too. Note that lightweight functions
* can be wrapped by (non-lightweight) bound functions so we must resolve
* the bound function chain first.
*/
func = duk__nonbound_func_lookup(ctx, idx_func, &num_stack_args, &tv_func, call_flags);
DUK_TVAL_SET_TVAL(&tv_func_copy, tv_func);
tv_func = &tv_func_copy; /* local copy to avoid relookups */
DUK_ASSERT(func == NULL || !DUK_HOBJECT_HAS_BOUND(func));
DUK_ASSERT(func == NULL || (DUK_HOBJECT_IS_COMPILEDFUNCTION(func) ||
DUK_HOBJECT_IS_NATIVEFUNCTION(func)));
duk__coerce_effective_this_binding(thr, func, idx_func + 1);
DUK_DDD(DUK_DDDPRINT("effective 'this' binding is: %!T",
(duk_tval *) duk_get_tval(ctx, idx_func + 1)));
/* [ ... func this arg1 ... argN ] */
/*
* Setup a preliminary activation and figure out nargs/nregs.
*
* Don't touch valstack_bottom or valstack_top yet so that Duktape API
* calls work normally.
*/
duk_hthread_callstack_grow(thr);
if (thr->callstack_top > 0) {
/*
* Update idx_retval of current activation.
*
* Although it might seem this is not necessary (bytecode executor
* does this for Ecmascript-to-Ecmascript calls; other calls are
* handled here), this turns out to be necessary for handling yield
* and resume. For them, an Ecmascript-to-native call happens, and
* the Ecmascript call's idx_retval must be set for things to work.
*/
(thr->callstack + thr->callstack_top - 1)->idx_retval = entry_valstack_bottom_index + idx_func;
}
DUK_ASSERT(thr->callstack_top < thr->callstack_size);
act = thr->callstack + thr->callstack_top;
thr->callstack_top++;
DUK_ASSERT(thr->callstack_top <= thr->callstack_size);
DUK_ASSERT(thr->valstack_top > thr->valstack_bottom); /* at least effective 'this' */
DUK_ASSERT(func == NULL || !DUK_HOBJECT_HAS_BOUND(func));
act->flags = 0;
/* For now all calls except Ecma-to-Ecma calls prevent a yield. */
act->flags |= DUK_ACT_FLAG_PREVENT_YIELD;
if (call_flags & DUK_CALL_FLAG_CONSTRUCTOR_CALL) {
act->flags |= DUK_ACT_FLAG_CONSTRUCT;
}
if (call_flags & DUK_CALL_FLAG_DIRECT_EVAL) {
act->flags |= DUK_ACT_FLAG_DIRECT_EVAL;
}
/* These base values are never used, but if the compiler doesn't know
* that DUK_ERROR() won't return, these are needed to silence warnings.
* On the other hand, scan-build will warn about the values not being
* used, so add a DUK_UNREF.
*/
nargs = 0; DUK_UNREF(nargs);
nregs = 0; DUK_UNREF(nregs);
if (DUK_LIKELY(func != NULL)) {
if (DUK_HOBJECT_HAS_STRICT(func)) {
act->flags |= DUK_ACT_FLAG_STRICT;
}
if (DUK_HOBJECT_IS_COMPILEDFUNCTION(func)) {
nargs = ((duk_hcompiledfunction *) func)->nargs;
nregs = ((duk_hcompiledfunction *) func)->nregs;
DUK_ASSERT(nregs >= nargs);
} else if (DUK_HOBJECT_IS_NATIVEFUNCTION(func)) {
/* Note: nargs (and nregs) may be negative for a native,
* function, which indicates that the function wants the
* input stack "as is" (i.e. handles "vararg" arguments).
*/
nargs = ((duk_hnativefunction *) func)->nargs;
nregs = nargs;
} else {
/* XXX: this should be an assert */
DUK_ERROR_TYPE(thr, DUK_STR_NOT_CALLABLE);
}
} else {
duk_small_uint_t lf_flags;
DUK_ASSERT(DUK_TVAL_IS_LIGHTFUNC(tv_func));
lf_flags = DUK_TVAL_GET_LIGHTFUNC_FLAGS(tv_func);
nargs = DUK_LFUNC_FLAGS_GET_NARGS(lf_flags);
if (nargs == DUK_LFUNC_NARGS_VARARGS) {
nargs = -1; /* vararg */
}
nregs = nargs;
act->flags |= DUK_ACT_FLAG_STRICT;
}
act->func = func; /* NULL for lightfunc */
act->var_env = NULL;
act->lex_env = NULL;
#if defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY)
act->prev_caller = NULL;
#endif
act->curr_pc = NULL;
#if defined(DUK_USE_DEBUGGER_SUPPORT)
act->prev_line = 0;
#endif
act->idx_bottom = entry_valstack_bottom_index + idx_func + 2;
#if 0 /* topmost activation idx_retval is considered garbage, no need to init */
act->idx_retval = 0;
#endif
DUK_TVAL_SET_TVAL(&act->tv_func, tv_func); /* borrowed, no refcount */
/* XXX: remove the preventcount and make yield walk the callstack?
* Or perhaps just use a single flag, not a counter, faster to just
* set and restore?
*/
if (act->flags & DUK_ACT_FLAG_PREVENT_YIELD) {
/* duk_hthread_callstack_unwind() will decrease this on unwind */
thr->callstack_preventcount++;
}
/* XXX: Is this INCREF necessary? 'func' is always a borrowed
* reference reachable through the value stack? If changed, stack
* unwind code also needs to be fixed to match.
*/
DUK_HOBJECT_INCREF_ALLOWNULL(thr, func); /* act->func */
#if defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY)
if (func) {
duk__update_func_caller_prop(thr, func);
}
act = thr->callstack + thr->callstack_top - 1;
#endif
/* [ ... func this arg1 ... argN ] */
/*
* Environment record creation and 'arguments' object creation.
* Named function expression name binding is handled by the
* compiler; the compiled function's parent env will contain
* the (immutable) binding already.
*
* This handling is now identical for C and Ecmascript functions.
* C functions always have the 'NEWENV' flag set, so their
* environment record initialization is delayed (which is good).
*
* Delayed creation (on demand) is handled in duk_js_var.c.
*/
DUK_ASSERT(func == NULL || !DUK_HOBJECT_HAS_BOUND(func)); /* bound function chain has already been resolved */
if (DUK_LIKELY(func != NULL)) {
if (DUK_LIKELY(DUK_HOBJECT_HAS_NEWENV(func))) {
if (DUK_LIKELY(!DUK_HOBJECT_HAS_CREATEARGS(func))) {
/* Use a new environment but there's no 'arguments' object;
* delayed environment initialization. This is the most
* common case.
*/
DUK_ASSERT(act->lex_env == NULL);
DUK_ASSERT(act->var_env == NULL);
} else {
/* Use a new environment and there's an 'arguments' object.
* We need to initialize it right now.
*/
/* third arg: absolute index (to entire valstack) of idx_bottom of new activation */
env = duk_create_activation_environment_record(thr, func, act->idx_bottom);
DUK_ASSERT(env != NULL);
/* [ ... func this arg1 ... argN envobj ] */
DUK_ASSERT(DUK_HOBJECT_HAS_CREATEARGS(func));
duk__handle_createargs_for_call(thr, func, env, num_stack_args);
/* [ ... func this arg1 ... argN envobj ] */
act = thr->callstack + thr->callstack_top - 1;
act->lex_env = env;
act->var_env = env;
DUK_HOBJECT_INCREF(thr, env);
DUK_HOBJECT_INCREF(thr, env); /* XXX: incref by count (2) directly */
duk_pop(ctx);
}
} else {
/* Use existing env (e.g. for non-strict eval); cannot have
* an own 'arguments' object (but can refer to an existing one).
*/
DUK_ASSERT(!DUK_HOBJECT_HAS_CREATEARGS(func));
duk__handle_oldenv_for_call(thr, func, act);
DUK_ASSERT(act->lex_env != NULL);
DUK_ASSERT(act->var_env != NULL);
}
} else {
/* Lightfuncs are always native functions and have "newenv". */
DUK_ASSERT(act->lex_env == NULL);
DUK_ASSERT(act->var_env == NULL);
}
/* [ ... func this arg1 ... argN ] */
/*
* Setup value stack: clamp to 'nargs', fill up to 'nregs'
*
* Value stack may either grow or shrink, depending on the
* number of func registers and the number of actual arguments.
* If nregs >= 0, func wants args clamped to 'nargs'; else it
* wants all args (= 'num_stack_args').
*/
/* XXX: optimize value stack operation */
/* XXX: don't want to shrink allocation here */
duk__adjust_valstack_and_top(thr,
num_stack_args,
idx_func + 2,
nregs,
nargs,
func);
/*
* Determine call type, then finalize activation, shift to
* new value stack bottom, and call the target.
*/
if (func != NULL && DUK_HOBJECT_IS_COMPILEDFUNCTION(func)) {
/*
* Ecmascript call
*/
duk_tval *tv_ret;
duk_tval *tv_funret;
DUK_ASSERT(func != NULL);
DUK_ASSERT(DUK_HOBJECT_HAS_COMPILEDFUNCTION(func));
act->curr_pc = DUK_HCOMPILEDFUNCTION_GET_CODE_BASE(thr->heap, (duk_hcompiledfunction *) func);
thr->valstack_bottom = thr->valstack_bottom + idx_func + 2;
/* keep current valstack_top */
DUK_ASSERT(thr->valstack_bottom >= thr->valstack);
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
DUK_ASSERT(thr->valstack_end >= thr->valstack_top);
/* [ ... func this | arg1 ... argN ] ('this' must precede new bottom) */
/*
* Bytecode executor call.
*
* Execute bytecode, handling any recursive function calls and
* thread resumptions. Returns when execution would return from
* the entry level activation. When the executor returns, a
* single return value is left on the stack top.
*
* The only possible longjmp() is an error (DUK_LJ_TYPE_THROW),
* other types are handled internally by the executor.
*/
/* thr->ptr_curr_pc is set by bytecode executor early on entry */
DUK_ASSERT(thr->ptr_curr_pc == NULL);
DUK_DDD(DUK_DDDPRINT("entering bytecode execution"));
duk_js_execute_bytecode(thr);
DUK_DDD(DUK_DDDPRINT("returned from bytecode execution"));
/* Unwind. */
DUK_ASSERT(thr->catchstack_top >= entry_catchstack_top); /* may need unwind */
DUK_ASSERT(thr->callstack_top == entry_callstack_top + 1);
DUK_ASSERT(thr->callstack_top == entry_callstack_top + 1);
duk_hthread_catchstack_unwind(thr, entry_catchstack_top);
duk_hthread_catchstack_shrink_check(thr);
duk_hthread_callstack_unwind(thr, entry_callstack_top);
duk_hthread_callstack_shrink_check(thr);
thr->valstack_bottom = thr->valstack + entry_valstack_bottom_index;
/* keep current valstack_top */
DUK_ASSERT(thr->valstack_bottom >= thr->valstack);
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
DUK_ASSERT(thr->valstack_end >= thr->valstack_top);
DUK_ASSERT(thr->valstack_top - thr->valstack_bottom >= idx_func + 1);
/* Return value handling. */
/* [ ... func this (crud) retval ] */
tv_ret = thr->valstack_bottom + idx_func;
tv_funret = thr->valstack_top - 1;
#if defined(DUK_USE_FASTINT)
/* Explicit check for fastint downgrade. */
DUK_TVAL_CHKFAST_INPLACE(tv_funret);
#endif
DUK_TVAL_SET_TVAL_UPDREF(thr, tv_ret, tv_funret); /* side effects */
} else {
/*
* Native call.
*/
duk_tval *tv_ret;
duk_tval *tv_funret;
thr->valstack_bottom = thr->valstack_bottom + idx_func + 2;
/* keep current valstack_top */
DUK_ASSERT(thr->valstack_bottom >= thr->valstack);
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
DUK_ASSERT(thr->valstack_end >= thr->valstack_top);
DUK_ASSERT(func == NULL || ((duk_hnativefunction *) func)->func != NULL);
/* [ ... func this | arg1 ... argN ] ('this' must precede new bottom) */
/* For native calls must be NULL so we don't sync back */
DUK_ASSERT(thr->ptr_curr_pc == NULL);
if (func) {
rc = ((duk_hnativefunction *) func)->func((duk_context *) thr);
} else {
duk_c_function funcptr = DUK_TVAL_GET_LIGHTFUNC_FUNCPTR(tv_func);
rc = funcptr((duk_context *) thr);
}
/* Automatic error throwing, retval check. */
if (rc < 0) {
duk_error_throw_from_negative_rc(thr, rc);
DUK_UNREACHABLE();
} else if (rc > 1) {
DUK_ERROR_API(thr, "c function returned invalid rc");
}
DUK_ASSERT(rc == 0 || rc == 1);
/* Unwind. */
DUK_ASSERT(thr->catchstack_top == entry_catchstack_top); /* no need to unwind */
DUK_ASSERT(thr->callstack_top == entry_callstack_top + 1);
duk_hthread_callstack_unwind(thr, entry_callstack_top);
duk_hthread_callstack_shrink_check(thr);
thr->valstack_bottom = thr->valstack + entry_valstack_bottom_index;
/* keep current valstack_top */
DUK_ASSERT(thr->valstack_bottom >= thr->valstack);
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
DUK_ASSERT(thr->valstack_end >= thr->valstack_top);
DUK_ASSERT(thr->valstack_top - thr->valstack_bottom >= idx_func + 1);
/* Return value handling. */
/* XXX: should this happen in the callee's activation or after unwinding? */
tv_ret = thr->valstack_bottom + idx_func;
if (rc == 0) {
DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv_ret); /* side effects */
} else {
/* [ ... func this (crud) retval ] */
tv_funret = thr->valstack_top - 1;
#if defined(DUK_USE_FASTINT)
/* Explicit check for fastint downgrade. */
DUK_TVAL_CHKFAST_INPLACE(tv_funret);
#endif
DUK_TVAL_SET_TVAL_UPDREF(thr, tv_ret, tv_funret); /* side effects */
}
}
duk_set_top(ctx, idx_func + 1); /* XXX: unnecessary, handle in adjust */
/* [ ... retval ] */
/* Ensure there is internal valstack spare before we exit; this may
* throw an alloc error. The same guaranteed size must be available
* as before the call. This is not optimal now: we store the valstack
* allocated size during entry; this value may be higher than the
* minimal guarantee for an application.
*/
/* XXX: we should never shrink here; when we error out later, we'd
* need to potentially grow the value stack in error unwind which could
* cause another error.
*/
(void) duk_valstack_resize_raw((duk_context *) thr,
entry_valstack_end, /* same as during entry */
DUK_VSRESIZE_FLAG_SHRINK | /* flags */
DUK_VSRESIZE_FLAG_COMPACT |
DUK_VSRESIZE_FLAG_THROW);
/* Restore entry thread executor curr_pc stack frame pointer. */
thr->ptr_curr_pc = entry_ptr_curr_pc;
DUK_HEAP_SWITCH_THREAD(thr->heap, entry_curr_thread); /* may be NULL */
thr->state = (duk_uint8_t) entry_thread_state;
DUK_ASSERT((thr->state == DUK_HTHREAD_STATE_INACTIVE && thr->heap->curr_thread == NULL) || /* first call */
(thr->state == DUK_HTHREAD_STATE_INACTIVE && thr->heap->curr_thread != NULL) || /* other call */
(thr->state == DUK_HTHREAD_STATE_RUNNING && thr->heap->curr_thread == thr)); /* current thread */
thr->heap->call_recursion_depth = entry_call_recursion_depth;
/* If the debugger is active we need to force an interrupt so that
* debugger breakpoints are rechecked. This is important for function
* calls caused by side effects (e.g. when doing a DUK_OP_GETPROP), see
* GH-303. Only needed for success path, error path always causes a
* breakpoint recheck in the executor. It would be enough to set this
* only when returning to an Ecmascript activation, but setting the flag
* on every return should have no ill effect.
*/
#if defined(DUK_USE_DEBUGGER_SUPPORT)
if (DUK_HEAP_IS_DEBUGGER_ATTACHED(thr->heap)) {
DUK_DD(DUK_DDPRINT("returning with debugger enabled, force interrupt"));
DUK_ASSERT(thr->interrupt_counter <= thr->interrupt_init);
thr->interrupt_init -= thr->interrupt_counter;
thr->interrupt_counter = 0;
thr->heap->dbg_force_restart = 1;
}
#endif
#if defined(DUK_USE_INTERRUPT_COUNTER) && defined(DUK_USE_DEBUG)
duk__interrupt_fixup(thr, entry_curr_thread);
#endif
return;
thread_state_error:
DUK_ERROR_FMT1(thr, DUK_ERR_TYPE_ERROR, "invalid thread state for call (%ld)", (long) thr->state);
DUK_UNREACHABLE();
return; /* never executed */
}
DUK_LOCAL void duk__handle_call_error(duk_hthread *thr,
duk_size_t entry_valstack_bottom_index,
duk_size_t entry_valstack_end,
duk_size_t entry_catchstack_top,
duk_size_t entry_callstack_top,
duk_int_t entry_call_recursion_depth,
duk_hthread *entry_curr_thread,
duk_uint_fast8_t entry_thread_state,
duk_instr_t **entry_ptr_curr_pc,
duk_idx_t idx_func,
duk_jmpbuf *old_jmpbuf_ptr) {
duk_context *ctx;
duk_tval *tv_ret;
ctx = (duk_context *) thr;
DUK_DDD(DUK_DDDPRINT("error caught during duk__handle_call_inner(): %!T",
(duk_tval *) &thr->heap->lj.value1));
/* Other longjmp types are handled by executor before propagating
* the error here.
*/
DUK_ASSERT(thr->heap->lj.type == DUK_LJ_TYPE_THROW);
DUK_ASSERT(thr->callstack_top >= entry_callstack_top);
DUK_ASSERT(thr->catchstack_top >= entry_catchstack_top);
/* We don't need to sync back thr->ptr_curr_pc here because
* the bytecode executor always has a setjmp catchpoint which
* does that before errors propagate to here.
*/
DUK_ASSERT(thr->ptr_curr_pc == NULL);
/* Restore the previous setjmp catcher so that any error in
* error handling will propagate outwards rather than re-enter
* the same handler. However, the error handling path must be
* designed to be error free so that sandboxing guarantees are
* reliable, see e.g. https://github.com/svaarala/duktape/issues/476.
*/
thr->heap->lj.jmpbuf_ptr = old_jmpbuf_ptr;
/* XXX: callstack unwind may now throw an error when closing
* scopes; this is a sandboxing issue, described in:
* https://github.com/svaarala/duktape/issues/476
*/
duk_hthread_catchstack_unwind(thr, entry_catchstack_top);
duk_hthread_catchstack_shrink_check(thr);
duk_hthread_callstack_unwind(thr, entry_callstack_top);
duk_hthread_callstack_shrink_check(thr);
thr->valstack_bottom = thr->valstack + entry_valstack_bottom_index;
tv_ret = thr->valstack_bottom + idx_func; /* XXX: byte offset? */
DUK_TVAL_SET_TVAL_UPDREF(thr, tv_ret, &thr->heap->lj.value1); /* side effects */
#if defined(DUK_USE_FASTINT)
/* Explicit check for fastint downgrade. */
DUK_TVAL_CHKFAST_INPLACE(tv_ret);
#endif
duk_set_top(ctx, idx_func + 1); /* XXX: could be eliminated with valstack adjust */
/* [ ... errobj ] */
/* Ensure there is internal valstack spare before we exit; this may
* throw an alloc error. The same guaranteed size must be available
* as before the call. This is not optimal now: we store the valstack
* allocated size during entry; this value may be higher than the
* minimal guarantee for an application.
*/
/* XXX: this needs to be reworked so that we never shrink the value
* stack on function entry so that we never need to grow it here.
* Needing to grow here is a sandboxing issue because we need to
* allocate which may cause an error in the error handling path
* and thus propagate an error out of a protected call.
*/
(void) duk_valstack_resize_raw((duk_context *) thr,
entry_valstack_end, /* same as during entry */
DUK_VSRESIZE_FLAG_SHRINK | /* flags */
DUK_VSRESIZE_FLAG_COMPACT |
DUK_VSRESIZE_FLAG_THROW);
/* These are just convenience "wiping" of state. Side effects should
* not be an issue here: thr->heap and thr->heap->lj have a stable
* pointer. Finalizer runs etc capture even out-of-memory errors so
* nothing should throw here.
*/
thr->heap->lj.type = DUK_LJ_TYPE_UNKNOWN;
thr->heap->lj.iserror = 0;
DUK_TVAL_SET_UNDEFINED_UPDREF(thr, &thr->heap->lj.value1); /* side effects */
DUK_TVAL_SET_UNDEFINED_UPDREF(thr, &thr->heap->lj.value2); /* side effects */
/* Restore entry thread executor curr_pc stack frame pointer. */
thr->ptr_curr_pc = entry_ptr_curr_pc;
DUK_HEAP_SWITCH_THREAD(thr->heap, entry_curr_thread); /* may be NULL */
thr->state = (duk_uint8_t) entry_thread_state;
DUK_ASSERT((thr->state == DUK_HTHREAD_STATE_INACTIVE && thr->heap->curr_thread == NULL) || /* first call */
(thr->state == DUK_HTHREAD_STATE_INACTIVE && thr->heap->curr_thread != NULL) || /* other call */
(thr->state == DUK_HTHREAD_STATE_RUNNING && thr->heap->curr_thread == thr)); /* current thread */
thr->heap->call_recursion_depth = entry_call_recursion_depth;
/* If the debugger is active we need to force an interrupt so that
* debugger breakpoints are rechecked. This is important for function
* calls caused by side effects (e.g. when doing a DUK_OP_GETPROP), see
* GH-303. Only needed for success path, error path always causes a
* breakpoint recheck in the executor. It would be enough to set this
* only when returning to an Ecmascript activation, but setting the flag
* on every return should have no ill effect.
*/
#if defined(DUK_USE_DEBUGGER_SUPPORT)
if (DUK_HEAP_IS_DEBUGGER_ATTACHED(thr->heap)) {
DUK_DD(DUK_DDPRINT("returning with debugger enabled, force interrupt"));
DUK_ASSERT(thr->interrupt_counter <= thr->interrupt_init);
thr->interrupt_init -= thr->interrupt_counter;
thr->interrupt_counter = 0;
thr->heap->dbg_force_restart = 1;
}
#endif
#if defined(DUK_USE_INTERRUPT_COUNTER) && defined(DUK_USE_DEBUG)
duk__interrupt_fixup(thr, entry_curr_thread);
#endif
}
/*
* duk_handle_safe_call(): make a "C protected call" within the
* current activation.
*
* The allowed thread states for making a call are the same as for
* duk_handle_call_xxx().
*
* Error handling is similar to duk_handle_call_xxx(); errors may be thrown
* (and result in a fatal error) for insane arguments.
*/
/* XXX: bump preventcount by one for the duration of this call? */
DUK_INTERNAL duk_int_t duk_handle_safe_call(duk_hthread *thr,
duk_safe_call_function func,
duk_idx_t num_stack_args,
duk_idx_t num_stack_rets) {
duk_context *ctx = (duk_context *) thr;
duk_size_t entry_valstack_bottom_index;
duk_size_t entry_callstack_top;
duk_size_t entry_catchstack_top;
duk_int_t entry_call_recursion_depth;
duk_hthread *entry_curr_thread;
duk_uint_fast8_t entry_thread_state;
duk_instr_t **entry_ptr_curr_pc;
duk_jmpbuf *old_jmpbuf_ptr = NULL;
duk_jmpbuf our_jmpbuf;
duk_idx_t idx_retbase;
duk_int_t retval;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(ctx != NULL);
/* Note: careful with indices like '-x'; if 'x' is zero, it refers to bottom */
entry_valstack_bottom_index = (duk_size_t) (thr->valstack_bottom - thr->valstack);
entry_callstack_top = thr->callstack_top;
entry_catchstack_top = thr->catchstack_top;
entry_call_recursion_depth = thr->heap->call_recursion_depth;
entry_curr_thread = thr->heap->curr_thread; /* Note: may be NULL if first call */
entry_thread_state = thr->state;
entry_ptr_curr_pc = thr->ptr_curr_pc; /* may be NULL */
idx_retbase = duk_get_top(ctx) - num_stack_args; /* Note: not a valid stack index if num_stack_args == 0 */
/* Note: cannot portably debug print a function pointer, hence 'func' not printed! */
DUK_DD(DUK_DDPRINT("duk_handle_safe_call: thr=%p, num_stack_args=%ld, num_stack_rets=%ld, "
"valstack_top=%ld, idx_retbase=%ld, rec_depth=%ld/%ld, "
"entry_valstack_bottom_index=%ld, entry_callstack_top=%ld, entry_catchstack_top=%ld, "
"entry_call_recursion_depth=%ld, entry_curr_thread=%p, entry_thread_state=%ld",
(void *) thr,
(long) num_stack_args,
(long) num_stack_rets,
(long) duk_get_top(ctx),
(long) idx_retbase,
(long) thr->heap->call_recursion_depth,
(long) thr->heap->call_recursion_limit,
(long) entry_valstack_bottom_index,
(long) entry_callstack_top,
(long) entry_catchstack_top,
(long) entry_call_recursion_depth,
(void *) entry_curr_thread,
(long) entry_thread_state));
if (idx_retbase < 0) {
/* Since stack indices are not reliable, we can't do anything useful
* here. Invoke the existing setjmp catcher, or if it doesn't exist,
* call the fatal error handler.
*/
DUK_ERROR_API(thr, DUK_STR_INVALID_CALL_ARGS);
}
/* setjmp catchpoint setup */
old_jmpbuf_ptr = thr->heap->lj.jmpbuf_ptr;
thr->heap->lj.jmpbuf_ptr = &our_jmpbuf;
#if defined(DUK_USE_CPP_EXCEPTIONS)
try {
#else
DUK_ASSERT(thr->heap->lj.jmpbuf_ptr == &our_jmpbuf);
if (DUK_SETJMP(our_jmpbuf.jb) == 0) {
/* Success path. */
#endif
DUK_DDD(DUK_DDDPRINT("safe_call setjmp catchpoint setup complete"));
duk__handle_safe_call_inner(thr,
func,
idx_retbase,
num_stack_rets,
entry_valstack_bottom_index,
entry_callstack_top,
entry_catchstack_top);
/* Longjmp state is kept clean in success path */
DUK_ASSERT(thr->heap->lj.type == DUK_LJ_TYPE_UNKNOWN);
DUK_ASSERT(thr->heap->lj.iserror == 0);
DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(&thr->heap->lj.value1));
DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(&thr->heap->lj.value2));
/* Note: either pointer may be NULL (at entry), so don't assert */
thr->heap->lj.jmpbuf_ptr = old_jmpbuf_ptr;
retval = DUK_EXEC_SUCCESS;
#if defined(DUK_USE_CPP_EXCEPTIONS)
} catch (duk_internal_exception &exc) {
DUK_UNREF(exc);
#else
} else {
/* Error path. */
#endif
duk__handle_safe_call_error(thr,
idx_retbase,
num_stack_rets,
entry_valstack_bottom_index,
entry_callstack_top,
entry_catchstack_top,
old_jmpbuf_ptr);
/* Longjmp state is cleaned up by error handling */
DUK_ASSERT(thr->heap->lj.type == DUK_LJ_TYPE_UNKNOWN);
DUK_ASSERT(thr->heap->lj.iserror == 0);
DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(&thr->heap->lj.value1));
DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(&thr->heap->lj.value2));
retval = DUK_EXEC_ERROR;
}
#if defined(DUK_USE_CPP_EXCEPTIONS)
catch (std::exception &exc) {
const char *what = exc.what();
if (!what) {
what = "unknown";
}
DUK_D(DUK_DPRINT("unexpected c++ std::exception (perhaps thrown by user code)"));
try {
DUK_ERROR_FMT1(thr, DUK_ERR_API_ERROR, "caught invalid c++ std::exception '%s' (perhaps thrown by user code)", what);
} catch (duk_internal_exception exc) {
DUK_D(DUK_DPRINT("caught api error thrown from unexpected c++ std::exception"));
DUK_UNREF(exc);
duk__handle_safe_call_error(thr,
idx_retbase,
num_stack_rets,
entry_valstack_bottom_index,
entry_callstack_top,
entry_catchstack_top,
old_jmpbuf_ptr);
retval = DUK_EXEC_ERROR;
}
} catch (...) {
DUK_D(DUK_DPRINT("unexpected c++ exception (perhaps thrown by user code)"));
try {
DUK_ERROR_API(thr, "caught invalid c++ exception (perhaps thrown by user code)");
} catch (duk_internal_exception exc) {
DUK_D(DUK_DPRINT("caught api error thrown from unexpected c++ exception"));
DUK_UNREF(exc);
duk__handle_safe_call_error(thr,
idx_retbase,
num_stack_rets,
entry_valstack_bottom_index,
entry_callstack_top,
entry_catchstack_top,
old_jmpbuf_ptr);
retval = DUK_EXEC_ERROR;
}
}
#endif
DUK_ASSERT(thr->heap->lj.jmpbuf_ptr == old_jmpbuf_ptr); /* success/error path both do this */
duk__handle_safe_call_shared(thr,
idx_retbase,
num_stack_rets,
entry_call_recursion_depth,
entry_curr_thread,
entry_thread_state,
entry_ptr_curr_pc);
return retval;
}
DUK_LOCAL void duk__handle_safe_call_inner(duk_hthread *thr,
duk_safe_call_function func,
duk_idx_t idx_retbase,
duk_idx_t num_stack_rets,
duk_size_t entry_valstack_bottom_index,
duk_size_t entry_callstack_top,
duk_size_t entry_catchstack_top) {
duk_context *ctx;
duk_ret_t rc;
DUK_ASSERT(thr != NULL);
ctx = (duk_context *) thr;
DUK_ASSERT_CTX_VALID(ctx);
DUK_UNREF(entry_valstack_bottom_index);
DUK_UNREF(entry_callstack_top);
DUK_UNREF(entry_catchstack_top);
/*
* Thread state check and book-keeping.
*/
if (thr == thr->heap->curr_thread) {
/* same thread */
if (thr->state != DUK_HTHREAD_STATE_RUNNING) {
/* should actually never happen, but check anyway */
goto thread_state_error;
}
} else {
/* different thread */
DUK_ASSERT(thr->heap->curr_thread == NULL ||
thr->heap->curr_thread->state == DUK_HTHREAD_STATE_RUNNING);
if (thr->state != DUK_HTHREAD_STATE_INACTIVE) {
goto thread_state_error;
}
DUK_HEAP_SWITCH_THREAD(thr->heap, thr);
thr->state = DUK_HTHREAD_STATE_RUNNING;
/* Note: multiple threads may be simultaneously in the RUNNING
* state, but not in the same "resume chain".
*/
}
DUK_ASSERT(thr->heap->curr_thread == thr);
DUK_ASSERT(thr->state == DUK_HTHREAD_STATE_RUNNING);
/*
* Recursion limit check.
*
* Note: there is no need for an "ignore recursion limit" flag
* for duk_handle_safe_call now.
*/
DUK_ASSERT(thr->heap->call_recursion_depth >= 0);
DUK_ASSERT(thr->heap->call_recursion_depth <= thr->heap->call_recursion_limit);
if (thr->heap->call_recursion_depth >= thr->heap->call_recursion_limit) {
/* XXX: error message is a bit misleading: we reached a recursion
* limit which is also essentially the same as a C callstack limit
* (except perhaps with some relaxed threading assumptions).
*/
DUK_ERROR_RANGE(thr, DUK_STR_C_CALLSTACK_LIMIT);
}
thr->heap->call_recursion_depth++;
/*
* Valstack spare check
*/
duk_require_stack(ctx, 0); /* internal spare */
/*
* Make the C call
*/
rc = func(ctx);
DUK_DDD(DUK_DDDPRINT("safe_call, func rc=%ld", (long) rc));
/*
* Valstack manipulation for results.
*/
/* we're running inside the caller's activation, so no change in call/catch stack or valstack bottom */
DUK_ASSERT(thr->callstack_top == entry_callstack_top);
DUK_ASSERT(thr->catchstack_top == entry_catchstack_top);
DUK_ASSERT(thr->valstack_bottom >= thr->valstack);
DUK_ASSERT((duk_size_t) (thr->valstack_bottom - thr->valstack) == entry_valstack_bottom_index);
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
DUK_ASSERT(thr->valstack_end >= thr->valstack_top);
if (rc < 0) {
duk_error_throw_from_negative_rc(thr, rc);
}
DUK_ASSERT(rc >= 0);
if (duk_get_top(ctx) < rc) {
DUK_ERROR_API(thr, "not enough stack values for safe_call rc");
}
DUK_ASSERT(thr->catchstack_top == entry_catchstack_top); /* no need to unwind */
DUK_ASSERT(thr->callstack_top == entry_callstack_top);
duk__safe_call_adjust_valstack(thr, idx_retbase, num_stack_rets, rc);
return;
thread_state_error:
DUK_ERROR_FMT1(thr, DUK_ERR_TYPE_ERROR, "invalid thread state for safe_call (%ld)", (long) thr->state);
DUK_UNREACHABLE();
}
DUK_LOCAL void duk__handle_safe_call_error(duk_hthread *thr,
duk_idx_t idx_retbase,
duk_idx_t num_stack_rets,
duk_size_t entry_valstack_bottom_index,
duk_size_t entry_callstack_top,
duk_size_t entry_catchstack_top,
duk_jmpbuf *old_jmpbuf_ptr) {
duk_context *ctx;
DUK_ASSERT(thr != NULL);
ctx = (duk_context *) thr;
DUK_ASSERT_CTX_VALID(ctx);
/*
* Error during call. The error value is at heap->lj.value1.
*
* The very first thing we do is restore the previous setjmp catcher.
* This means that any error in error handling will propagate outwards
* instead of causing a setjmp() re-entry above.
*/
DUK_DDD(DUK_DDDPRINT("error caught during protected duk_handle_safe_call()"));
/* Other longjmp types are handled by executor before propagating
* the error here.
*/
DUK_ASSERT(thr->heap->lj.type == DUK_LJ_TYPE_THROW);
DUK_ASSERT(thr->callstack_top >= entry_callstack_top);
DUK_ASSERT(thr->catchstack_top >= entry_catchstack_top);
/* Note: either pointer may be NULL (at entry), so don't assert. */
thr->heap->lj.jmpbuf_ptr = old_jmpbuf_ptr;
DUK_ASSERT(thr->catchstack_top >= entry_catchstack_top);
DUK_ASSERT(thr->callstack_top >= entry_callstack_top);
duk_hthread_catchstack_unwind(thr, entry_catchstack_top);
duk_hthread_catchstack_shrink_check(thr);
duk_hthread_callstack_unwind(thr, entry_callstack_top);
duk_hthread_callstack_shrink_check(thr);
thr->valstack_bottom = thr->valstack + entry_valstack_bottom_index;
/* [ ... | (crud) ] */
/* XXX: space in valstack? see discussion in duk_handle_call_xxx(). */
duk_push_tval(ctx, &thr->heap->lj.value1);
/* [ ... | (crud) errobj ] */
DUK_ASSERT(duk_get_top(ctx) >= 1); /* at least errobj must be on stack */
/* check that the valstack has space for the final amount and any
* intermediate space needed; this is unoptimal but should be safe
*/
duk_require_stack_top(ctx, idx_retbase + num_stack_rets); /* final configuration */
duk_require_stack(ctx, num_stack_rets);
duk__safe_call_adjust_valstack(thr, idx_retbase, num_stack_rets, 1); /* 1 = num actual 'return values' */
/* [ ... | ] or [ ... | errobj (M * undefined)] where M = num_stack_rets - 1 */
/* These are just convenience "wiping" of state. Side effects should
* not be an issue here: thr->heap and thr->heap->lj have a stable
* pointer. Finalizer runs etc capture even out-of-memory errors so
* nothing should throw here.
*/
thr->heap->lj.type = DUK_LJ_TYPE_UNKNOWN;
thr->heap->lj.iserror = 0;
DUK_TVAL_SET_UNDEFINED_UPDREF(thr, &thr->heap->lj.value1); /* side effects */
DUK_TVAL_SET_UNDEFINED_UPDREF(thr, &thr->heap->lj.value2); /* side effects */
}
DUK_LOCAL void duk__handle_safe_call_shared(duk_hthread *thr,
duk_idx_t idx_retbase,
duk_idx_t num_stack_rets,
duk_int_t entry_call_recursion_depth,
duk_hthread *entry_curr_thread,
duk_uint_fast8_t entry_thread_state,
duk_instr_t **entry_ptr_curr_pc) {
duk_context *ctx;
DUK_ASSERT(thr != NULL);
ctx = (duk_context *) thr;
DUK_ASSERT_CTX_VALID(ctx);
DUK_UNREF(ctx);
DUK_UNREF(idx_retbase);
DUK_UNREF(num_stack_rets);
/* Restore entry thread executor curr_pc stack frame pointer. */
thr->ptr_curr_pc = entry_ptr_curr_pc;
/* XXX: because we unwind stacks above, thr->heap->curr_thread is at
* risk of pointing to an already freed thread. This was indeed the
* case in test-bug-multithread-valgrind.c, until duk_handle_call()
* was fixed to restore thr->heap->curr_thread before rethrowing an
* uncaught error.
*/
DUK_HEAP_SWITCH_THREAD(thr->heap, entry_curr_thread); /* may be NULL */
thr->state = (duk_uint8_t) entry_thread_state;
DUK_ASSERT((thr->state == DUK_HTHREAD_STATE_INACTIVE && thr->heap->curr_thread == NULL) || /* first call */
(thr->state == DUK_HTHREAD_STATE_INACTIVE && thr->heap->curr_thread != NULL) || /* other call */
(thr->state == DUK_HTHREAD_STATE_RUNNING && thr->heap->curr_thread == thr)); /* current thread */
thr->heap->call_recursion_depth = entry_call_recursion_depth;
/* stack discipline consistency check */
DUK_ASSERT(duk_get_top(ctx) == idx_retbase + num_stack_rets);
/* A debugger forced interrupt check is not needed here, as
* problematic safe calls are not caused by side effects.
*/
#if defined(DUK_USE_INTERRUPT_COUNTER) && defined(DUK_USE_DEBUG)
duk__interrupt_fixup(thr, entry_curr_thread);
#endif
}
/*
* Helper for handling an Ecmascript-to-Ecmascript call or an Ecmascript
* function (initial) Duktape.Thread.resume().
*
* Compared to normal calls handled by duk_handle_call(), there are a
* bunch of differences:
*
* - the call is never protected
* - there is no C recursion depth increase (hence an "ignore recursion
* limit" flag is not applicable)
* - instead of making the call, this helper just performs the thread
* setup and returns; the bytecode executor then restarts execution
* internally
* - ecmascript functions are never 'vararg' functions (they access
* varargs through the 'arguments' object)
*
* The callstack of the target contains an earlier Ecmascript call in case
* of an Ecmascript-to-Ecmascript call (whose idx_retval is updated), or
* is empty in case of an initial Duktape.Thread.resume().
*
* The first thing to do here is to figure out whether an ecma-to-ecma
* call is actually possible. It's not always the case if the target is
* a bound function; the final function may be native. In that case,
* return an error so caller can fall back to a normal call path.
*/
DUK_INTERNAL duk_bool_t duk_handle_ecma_call_setup(duk_hthread *thr,
duk_idx_t num_stack_args,
duk_small_uint_t call_flags) {
duk_context *ctx = (duk_context *) thr;
duk_size_t entry_valstack_bottom_index;
duk_idx_t idx_func; /* valstack index of 'func' and retval (relative to entry valstack_bottom) */
duk_idx_t idx_args; /* valstack index of start of args (arg1) (relative to entry valstack_bottom) */
duk_idx_t nargs; /* # argument registers target function wants (< 0 => never for ecma calls) */
duk_idx_t nregs; /* # total registers target function wants on entry (< 0 => never for ecma calls) */
duk_hobject *func; /* 'func' on stack (borrowed reference) */
duk_tval *tv_func; /* duk_tval ptr for 'func' on stack (borrowed reference) */
duk_activation *act;
duk_hobject *env;
duk_bool_t use_tailcall;
duk_instr_t **entry_ptr_curr_pc;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(!((call_flags & DUK_CALL_FLAG_IS_RESUME) != 0 && (call_flags & DUK_CALL_FLAG_IS_TAILCALL) != 0));
/* XXX: assume these? */
DUK_ASSERT(thr->valstack != NULL);
DUK_ASSERT(thr->callstack != NULL);
DUK_ASSERT(thr->catchstack != NULL);
/* no need to handle thread state book-keeping here */
DUK_ASSERT((call_flags & DUK_CALL_FLAG_IS_RESUME) != 0 ||
(thr->state == DUK_HTHREAD_STATE_RUNNING &&
thr->heap->curr_thread == thr));
/* If thr->ptr_curr_pc is set, sync curr_pc to act->pc. Then NULL
* thr->ptr_curr_pc so that it's not accidentally used with an incorrect
* activation when side effects occur. If we end up not making the
* call we must restore the value.
*/
entry_ptr_curr_pc = thr->ptr_curr_pc;
duk_hthread_sync_and_null_currpc(thr);
/* if a tail call:
* - an Ecmascript activation must be on top of the callstack
* - there cannot be any active catchstack entries
*/
#if defined(DUK_USE_ASSERTIONS)
if (call_flags & DUK_CALL_FLAG_IS_TAILCALL) {
duk_size_t our_callstack_index;
duk_size_t i;
DUK_ASSERT(thr->callstack_top >= 1);
our_callstack_index = thr->callstack_top - 1;
DUK_ASSERT_DISABLE(our_callstack_index >= 0);
DUK_ASSERT(our_callstack_index < thr->callstack_size);
DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack + our_callstack_index) != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION(DUK_ACT_GET_FUNC(thr->callstack + our_callstack_index)));
/* No entry in the catchstack which would actually catch a
* throw can refer to the callstack entry being reused.
* There *can* be catchstack entries referring to the current
* callstack entry as long as they don't catch (e.g. label sites).
*/
for (i = 0; i < thr->catchstack_top; i++) {
DUK_ASSERT(thr->catchstack[i].callstack_index < our_callstack_index || /* refer to callstack entries below current */
DUK_CAT_GET_TYPE(thr->catchstack + i) == DUK_CAT_TYPE_LABEL); /* or a non-catching entry */
}
}
#endif /* DUK_USE_ASSERTIONS */
entry_valstack_bottom_index = (duk_size_t) (thr->valstack_bottom - thr->valstack);
/* XXX: rework */
idx_func = duk_normalize_index(thr, -num_stack_args - 2);
idx_args = idx_func + 2;
DUK_DD(DUK_DDPRINT("handle_ecma_call_setup: thr=%p, "
"num_stack_args=%ld, call_flags=0x%08lx (resume=%ld, tailcall=%ld), "
"idx_func=%ld, idx_args=%ld, entry_valstack_bottom_index=%ld",
(void *) thr,
(long) num_stack_args,
(unsigned long) call_flags,
(long) ((call_flags & DUK_CALL_FLAG_IS_RESUME) != 0 ? 1 : 0),
(long) ((call_flags & DUK_CALL_FLAG_IS_TAILCALL) != 0 ? 1 : 0),
(long) idx_func,
(long) idx_args,
(long) entry_valstack_bottom_index));
if (DUK_UNLIKELY(idx_func < 0 || idx_args < 0)) {
/* XXX: assert? compiler is responsible for this never happening */
DUK_ERROR_API(thr, DUK_STR_INVALID_CALL_ARGS);
}
/*
* Check the function type, handle bound function chains, and prepare
* parameters for the rest of the call handling. Also figure out the
* effective 'this' binding, which replaces the current value at
* idx_func + 1.
*
* If the target function is a 'bound' one, follow the chain of 'bound'
* functions until a non-bound function is found. During this process,
* bound arguments are 'prepended' to existing ones, and the "this"
* binding is overridden. See E5 Section 15.3.4.5.1.
*
* If the final target function cannot be handled by an ecma-to-ecma
* call, return to the caller with a return value indicating this case.
* The bound chain is resolved and the caller can resume with a plain
* function call.
*/
func = duk__nonbound_func_lookup(ctx, idx_func, &num_stack_args, &tv_func, call_flags);
if (func == NULL || !DUK_HOBJECT_IS_COMPILEDFUNCTION(func)) {
DUK_DDD(DUK_DDDPRINT("final target is a lightfunc/nativefunc, cannot do ecma-to-ecma call"));
thr->ptr_curr_pc = entry_ptr_curr_pc;
return 0;
}
/* XXX: tv_func is not actually needed */
DUK_ASSERT(func != NULL);
DUK_ASSERT(!DUK_HOBJECT_HAS_BOUND(func));
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION(func));
duk__coerce_effective_this_binding(thr, func, idx_func + 1);
DUK_DDD(DUK_DDDPRINT("effective 'this' binding is: %!T",
duk_get_tval(ctx, idx_func + 1)));
nargs = ((duk_hcompiledfunction *) func)->nargs;
nregs = ((duk_hcompiledfunction *) func)->nregs;
DUK_ASSERT(nregs >= nargs);
/* [ ... func this arg1 ... argN ] */
/*
* Preliminary activation record and valstack manipulation.
* The concrete actions depend on whether the we're dealing
* with a tail call (reuse an existing activation), a resume,
* or a normal call.
*
* The basic actions, in varying order, are:
*
* - Check stack size for call handling
* - Grow call stack if necessary (non-tail-calls)
* - Update current activation (idx_retval) if necessary
* (non-tail, non-resume calls)
* - Move start of args (idx_args) to valstack bottom
* (tail calls)
*
* Don't touch valstack_bottom or valstack_top yet so that Duktape API
* calls work normally.
*/
/* XXX: some overlapping code; cleanup */
use_tailcall = call_flags & DUK_CALL_FLAG_IS_TAILCALL;
#if !defined(DUK_USE_TAILCALL)
DUK_ASSERT(use_tailcall == 0); /* compiler ensures this */
#endif
if (use_tailcall) {
/* tailcall cannot be flagged to resume calls, and a
* previous frame must exist
*/
DUK_ASSERT(thr->callstack_top >= 1);
DUK_ASSERT((call_flags & DUK_CALL_FLAG_IS_RESUME) == 0);
act = thr->callstack + thr->callstack_top - 1;
if (act->flags & DUK_ACT_FLAG_PREVENT_YIELD) {
/* See: test-bug-tailcall-preventyield-assert.c. */
DUK_DDD(DUK_DDDPRINT("tail call prevented by current activation having DUK_ACT_FLAG_PREVENTYIELD"));
use_tailcall = 0;
} else if (DUK_HOBJECT_HAS_NOTAIL(func)) {
DUK_D(DUK_DPRINT("tail call prevented by function having a notail flag"));
use_tailcall = 0;
}
}
if (use_tailcall) {
duk_tval *tv1, *tv2;
duk_size_t cs_index;
duk_int_t i_stk; /* must be signed for loop structure */
duk_idx_t i_arg;
/*
* Tailcall handling
*
* Although the callstack entry is reused, we need to explicitly unwind
* the current activation (or simulate an unwind). In particular, the
* current activation must be closed, otherwise something like
* test-bug-reduce-judofyr.js results. Also catchstack needs be unwound
* because there may be non-error-catching label entries in valid tail calls.
*/
DUK_DDD(DUK_DDDPRINT("is tail call, reusing activation at callstack top, at index %ld",
(long) (thr->callstack_top - 1)));
/* 'act' already set above */
DUK_ASSERT(!DUK_HOBJECT_HAS_BOUND(func));
DUK_ASSERT(!DUK_HOBJECT_HAS_NATIVEFUNCTION(func));
DUK_ASSERT(DUK_HOBJECT_HAS_COMPILEDFUNCTION(func));
DUK_ASSERT((act->flags & DUK_ACT_FLAG_PREVENT_YIELD) == 0);
/* Unwind catchstack entries referring to the callstack entry we're reusing */
cs_index = thr->callstack_top - 1;
DUK_ASSERT(thr->catchstack_top <= DUK_INT_MAX); /* catchstack limits */
for (i_stk = (duk_int_t) (thr->catchstack_top - 1); i_stk >= 0; i_stk--) {
duk_catcher *cat = thr->catchstack + i_stk;
if (cat->callstack_index != cs_index) {
/* 'i' is the first entry we'll keep */
break;
}
}
duk_hthread_catchstack_unwind(thr, i_stk + 1);
/* Unwind the topmost callstack entry before reusing it */
DUK_ASSERT(thr->callstack_top > 0);
duk_hthread_callstack_unwind(thr, thr->callstack_top - 1);
/* Then reuse the unwound activation; callstack was not shrunk so there is always space */
thr->callstack_top++;
DUK_ASSERT(thr->callstack_top <= thr->callstack_size);
act = thr->callstack + thr->callstack_top - 1;
/* Start filling in the activation */
act->func = func; /* don't want an intermediate exposed state with func == NULL */
#if defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY)
act->prev_caller = NULL;
#endif
DUK_ASSERT(func != NULL);
DUK_ASSERT(DUK_HOBJECT_HAS_COMPILEDFUNCTION(func));
/* don't want an intermediate exposed state with invalid pc */
act->curr_pc = DUK_HCOMPILEDFUNCTION_GET_CODE_BASE(thr->heap, (duk_hcompiledfunction *) func);
#if defined(DUK_USE_DEBUGGER_SUPPORT)
act->prev_line = 0;
#endif
DUK_TVAL_SET_OBJECT(&act->tv_func, func); /* borrowed, no refcount */
#if defined(DUK_USE_REFERENCE_COUNTING)
DUK_HOBJECT_INCREF(thr, func);
act = thr->callstack + thr->callstack_top - 1; /* side effects (currently none though) */
#endif
#if defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY)
#if defined(DUK_USE_TAILCALL)
#error incorrect options: tail calls enabled with function caller property
#endif
/* XXX: this doesn't actually work properly for tail calls, so
* tail calls are disabled when DUK_USE_NONSTD_FUNC_CALLER_PROPERTY
* is in use.
*/
duk__update_func_caller_prop(thr, func);
act = thr->callstack + thr->callstack_top - 1;
#endif
act->flags = (DUK_HOBJECT_HAS_STRICT(func) ?
DUK_ACT_FLAG_STRICT | DUK_ACT_FLAG_TAILCALLED :
DUK_ACT_FLAG_TAILCALLED);
DUK_ASSERT(DUK_ACT_GET_FUNC(act) == func); /* already updated */
DUK_ASSERT(act->var_env == NULL); /* already NULLed (by unwind) */
DUK_ASSERT(act->lex_env == NULL); /* already NULLed (by unwind) */
act->idx_bottom = entry_valstack_bottom_index; /* tail call -> reuse current "frame" */
DUK_ASSERT(nregs >= 0);
#if 0 /* topmost activation idx_retval is considered garbage, no need to init */
act->idx_retval = 0;
#endif
/*
* Manipulate valstack so that args are on the current bottom and the
* previous caller's 'this' binding (which is the value preceding the
* current bottom) is replaced with the new 'this' binding:
*
* [ ... this_old | (crud) func this_new arg1 ... argN ]
* --> [ ... this_new | arg1 ... argN ]
*
* For tail calling to work properly, the valstack bottom must not grow
* here; otherwise crud would accumulate on the valstack.
*/
tv1 = thr->valstack_bottom - 1;
tv2 = thr->valstack_bottom + idx_func + 1;
DUK_ASSERT(tv1 >= thr->valstack && tv1 < thr->valstack_top); /* tv1 is -below- valstack_bottom */
DUK_ASSERT(tv2 >= thr->valstack_bottom && tv2 < thr->valstack_top);
DUK_TVAL_SET_TVAL_UPDREF(thr, tv1, tv2); /* side effects */
for (i_arg = 0; i_arg < idx_args; i_arg++) {
/* XXX: block removal API primitive */
/* Note: 'func' is popped from valstack here, but it is
* already reachable from the activation.
*/
duk_remove(ctx, 0);
}
idx_func = 0; DUK_UNREF(idx_func); /* really 'not applicable' anymore, should not be referenced after this */
idx_args = 0;
/* [ ... this_new | arg1 ... argN ] */
} else {
DUK_DDD(DUK_DDDPRINT("not a tail call, pushing a new activation to callstack, to index %ld",
(long) (thr->callstack_top)));
duk_hthread_callstack_grow(thr);
if (call_flags & DUK_CALL_FLAG_IS_RESUME) {
DUK_DDD(DUK_DDDPRINT("is resume -> no update to current activation (may not even exist)"));
} else {
DUK_DDD(DUK_DDDPRINT("update to current activation idx_retval"));
DUK_ASSERT(thr->callstack_top < thr->callstack_size);
DUK_ASSERT(thr->callstack_top >= 1);
act = thr->callstack + thr->callstack_top - 1;
DUK_ASSERT(DUK_ACT_GET_FUNC(act) != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION(DUK_ACT_GET_FUNC(act)));
act->idx_retval = entry_valstack_bottom_index + idx_func;
}
DUK_ASSERT(thr->callstack_top < thr->callstack_size);
act = thr->callstack + thr->callstack_top;
thr->callstack_top++;
DUK_ASSERT(thr->callstack_top <= thr->callstack_size);
DUK_ASSERT(!DUK_HOBJECT_HAS_BOUND(func));
DUK_ASSERT(!DUK_HOBJECT_HAS_NATIVEFUNCTION(func));
DUK_ASSERT(DUK_HOBJECT_HAS_COMPILEDFUNCTION(func));
act->flags = (DUK_HOBJECT_HAS_STRICT(func) ?
DUK_ACT_FLAG_STRICT :
0);
act->func = func;
act->var_env = NULL;
act->lex_env = NULL;
#if defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY)
act->prev_caller = NULL;
#endif
DUK_ASSERT(func != NULL);
DUK_ASSERT(DUK_HOBJECT_HAS_COMPILEDFUNCTION(func));
act->curr_pc = DUK_HCOMPILEDFUNCTION_GET_CODE_BASE(thr->heap, (duk_hcompiledfunction *) func);
#if defined(DUK_USE_DEBUGGER_SUPPORT)
act->prev_line = 0;
#endif
act->idx_bottom = entry_valstack_bottom_index + idx_args;
DUK_ASSERT(nregs >= 0);
#if 0 /* topmost activation idx_retval is considered garbage, no need to init */
act->idx_retval = 0;
#endif
DUK_TVAL_SET_OBJECT(&act->tv_func, func); /* borrowed, no refcount */
DUK_HOBJECT_INCREF(thr, func); /* act->func */
#if defined(DUK_USE_NONSTD_FUNC_CALLER_PROPERTY)
duk__update_func_caller_prop(thr, func);
act = thr->callstack + thr->callstack_top - 1;
#endif
}
/* [ ... func this arg1 ... argN ] (not tail call)
* [ this | arg1 ... argN ] (tail call)
*
* idx_args updated to match
*/
/*
* Environment record creation and 'arguments' object creation.
* Named function expression name binding is handled by the
* compiler; the compiled function's parent env will contain
* the (immutable) binding already.
*
* Delayed creation (on demand) is handled in duk_js_var.c.
*/
/* XXX: unify handling with native call. */
DUK_ASSERT(!DUK_HOBJECT_HAS_BOUND(func)); /* bound function chain has already been resolved */
if (!DUK_HOBJECT_HAS_NEWENV(func)) {
/* use existing env (e.g. for non-strict eval); cannot have
* an own 'arguments' object (but can refer to the existing one)
*/
duk__handle_oldenv_for_call(thr, func, act);
DUK_ASSERT(act->lex_env != NULL);
DUK_ASSERT(act->var_env != NULL);
goto env_done;
}
DUK_ASSERT(DUK_HOBJECT_HAS_NEWENV(func));
if (!DUK_HOBJECT_HAS_CREATEARGS(func)) {
/* no need to create environment record now; leave as NULL */
DUK_ASSERT(act->lex_env == NULL);
DUK_ASSERT(act->var_env == NULL);
goto env_done;
}
/* third arg: absolute index (to entire valstack) of idx_bottom of new activation */
env = duk_create_activation_environment_record(thr, func, act->idx_bottom);
DUK_ASSERT(env != NULL);
/* [ ... arg1 ... argN envobj ] */
/* original input stack before nargs/nregs handling must be
* intact for 'arguments' object
*/
DUK_ASSERT(DUK_HOBJECT_HAS_CREATEARGS(func));
duk__handle_createargs_for_call(thr, func, env, num_stack_args);
/* [ ... arg1 ... argN envobj ] */
act = thr->callstack + thr->callstack_top - 1;
act->lex_env = env;
act->var_env = env;
DUK_HOBJECT_INCREF(thr, act->lex_env);
DUK_HOBJECT_INCREF(thr, act->var_env);
duk_pop(ctx);
env_done:
/* [ ... arg1 ... argN ] */
/*
* Setup value stack: clamp to 'nargs', fill up to 'nregs'
*/
duk__adjust_valstack_and_top(thr,
num_stack_args,
idx_args,
nregs,
nargs,
func);
/*
* Shift to new valstack_bottom.
*/
thr->valstack_bottom = thr->valstack_bottom + idx_args;
/* keep current valstack_top */
DUK_ASSERT(thr->valstack_bottom >= thr->valstack);
DUK_ASSERT(thr->valstack_top >= thr->valstack_bottom);
DUK_ASSERT(thr->valstack_end >= thr->valstack_top);
/*
* Return to bytecode executor, which will resume execution from
* the topmost activation.
*/
return 1;
}
#line 1 "duk_js_compiler.c"
/*
* Ecmascript compiler.
*
* Parses an input string and generates a function template result.
* Compilation may happen in multiple contexts (global code, eval
* code, function code).
*
* The parser uses a traditional top-down recursive parsing for the
* statement level, and an operator precedence based top-down approach
* for the expression level. The attempt is to minimize the C stack
* depth. Bytecode is generated directly without an intermediate
* representation (tree), at the cost of needing two passes over each
* function.
*
* The top-down recursive parser functions are named "duk__parse_XXX".
*
* Recursion limits are in key functions to prevent arbitrary C recursion:
* function body parsing, statement parsing, and expression parsing.
*
* See doc/compiler.rst for discussion on the design.
*
* A few typing notes:
*
* - duk_regconst_t: unsigned, no marker value for "none"
* - duk_reg_t: signed, < 0 = none
* - PC values: duk_int_t, negative values used as markers
*/
/* include removed: duk_internal.h */
/* if highest bit of a register number is set, it refers to a constant instead */
#define DUK__CONST_MARKER DUK_JS_CONST_MARKER
/* for array and object literals */
#define DUK__MAX_ARRAY_INIT_VALUES 20
#define DUK__MAX_OBJECT_INIT_PAIRS 10
/* XXX: hack, remove when const lookup is not O(n) */
#define DUK__GETCONST_MAX_CONSTS_CHECK 256
/* These limits are based on bytecode limits. Max temps is limited
* by duk_hcompiledfunction nargs/nregs fields being 16 bits.
*/
#define DUK__MAX_CONSTS DUK_BC_BC_MAX
#define DUK__MAX_FUNCS DUK_BC_BC_MAX
#define DUK__MAX_TEMPS 0xffffL
/* Initial bytecode size allocation. */
#define DUK__BC_INITIAL_INSTS 256
#define DUK__RECURSION_INCREASE(comp_ctx,thr) do { \
DUK_DDD(DUK_DDDPRINT("RECURSION INCREASE: %s:%ld", (const char *) DUK_FILE_MACRO, (long) DUK_LINE_MACRO)); \
duk__recursion_increase((comp_ctx)); \
} while (0)
#define DUK__RECURSION_DECREASE(comp_ctx,thr) do { \
DUK_DDD(DUK_DDDPRINT("RECURSION DECREASE: %s:%ld", (const char *) DUK_FILE_MACRO, (long) DUK_LINE_MACRO)); \
duk__recursion_decrease((comp_ctx)); \
} while (0)
/* Value stack slot limits: these are quite approximate right now, and
* because they overlap in control flow, some could be eliminated.
*/
#define DUK__COMPILE_ENTRY_SLOTS 8
#define DUK__FUNCTION_INIT_REQUIRE_SLOTS 16
#define DUK__FUNCTION_BODY_REQUIRE_SLOTS 16
#define DUK__PARSE_STATEMENTS_SLOTS 16
#define DUK__PARSE_EXPR_SLOTS 16
/* Temporary structure used to pass a stack allocated region through
* duk_safe_call().
*/
typedef struct {
duk_small_uint_t flags;
duk_compiler_ctx comp_ctx_alloc;
duk_lexer_point lex_pt_alloc;
} duk__compiler_stkstate;
/*
* Prototypes
*/
/* lexing */
DUK_LOCAL_DECL void duk__advance_helper(duk_compiler_ctx *comp_ctx, duk_small_int_t expect);
DUK_LOCAL_DECL void duk__advance_expect(duk_compiler_ctx *comp_ctx, duk_small_int_t expect);
DUK_LOCAL_DECL void duk__advance(duk_compiler_ctx *ctx);
/* function helpers */
DUK_LOCAL_DECL void duk__init_func_valstack_slots(duk_compiler_ctx *comp_ctx);
DUK_LOCAL_DECL void duk__reset_func_for_pass2(duk_compiler_ctx *comp_ctx);
DUK_LOCAL_DECL void duk__init_varmap_and_prologue_for_pass2(duk_compiler_ctx *comp_ctx, duk_reg_t *out_stmt_value_reg);
DUK_LOCAL_DECL void duk__convert_to_func_template(duk_compiler_ctx *comp_ctx, duk_bool_t force_no_namebind);
DUK_LOCAL_DECL duk_int_t duk__cleanup_varmap(duk_compiler_ctx *comp_ctx);
/* code emission */
DUK_LOCAL_DECL duk_int_t duk__get_current_pc(duk_compiler_ctx *comp_ctx);
DUK_LOCAL_DECL duk_compiler_instr *duk__get_instr_ptr(duk_compiler_ctx *comp_ctx, duk_int_t pc);
DUK_LOCAL_DECL void duk__emit(duk_compiler_ctx *comp_ctx, duk_instr_t ins);
#if 0 /* unused */
DUK_LOCAL_DECL void duk__emit_op_only(duk_compiler_ctx *comp_ctx, duk_small_uint_t op);
#endif
DUK_LOCAL_DECL void duk__emit_a_b_c(duk_compiler_ctx *comp_ctx, duk_small_uint_t op_flags, duk_regconst_t a, duk_regconst_t b, duk_regconst_t c);
DUK_LOCAL_DECL void duk__emit_a_b(duk_compiler_ctx *comp_ctx, duk_small_uint_t op_flags, duk_regconst_t a, duk_regconst_t b);
#if 0 /* unused */
DUK_LOCAL_DECL void duk__emit_a(duk_compiler_ctx *comp_ctx, duk_small_uint_t op_flags, duk_regconst_t a);
#endif
DUK_LOCAL_DECL void duk__emit_a_bc(duk_compiler_ctx *comp_ctx, duk_small_uint_t op_flags, duk_regconst_t a, duk_regconst_t bc);
DUK_LOCAL_DECL void duk__emit_abc(duk_compiler_ctx *comp_ctx, duk_small_uint_t op, duk_regconst_t abc);
DUK_LOCAL_DECL void duk__emit_extraop_b_c(duk_compiler_ctx *comp_ctx, duk_small_uint_t extraop_flags, duk_regconst_t b, duk_regconst_t c);
DUK_LOCAL_DECL void duk__emit_extraop_b(duk_compiler_ctx *comp_ctx, duk_small_uint_t extraop_flags, duk_regconst_t b);
DUK_LOCAL_DECL void duk__emit_extraop_bc(duk_compiler_ctx *comp_ctx, duk_small_uint_t extraop, duk_regconst_t bc);
DUK_LOCAL_DECL void duk__emit_extraop_only(duk_compiler_ctx *comp_ctx, duk_small_uint_t extraop_flags);
DUK_LOCAL_DECL void duk__emit_load_int32(duk_compiler_ctx *comp_ctx, duk_reg_t reg, duk_int32_t val);
DUK_LOCAL_DECL void duk__emit_load_int32_noshuffle(duk_compiler_ctx *comp_ctx, duk_reg_t reg, duk_int32_t val);
DUK_LOCAL_DECL void duk__emit_jump(duk_compiler_ctx *comp_ctx, duk_int_t target_pc);
DUK_LOCAL_DECL duk_int_t duk__emit_jump_empty(duk_compiler_ctx *comp_ctx);
DUK_LOCAL_DECL void duk__insert_jump_entry(duk_compiler_ctx *comp_ctx, duk_int_t jump_pc);
DUK_LOCAL_DECL void duk__patch_jump(duk_compiler_ctx *comp_ctx, duk_int_t jump_pc, duk_int_t target_pc);
DUK_LOCAL_DECL void duk__patch_jump_here(duk_compiler_ctx *comp_ctx, duk_int_t jump_pc);
DUK_LOCAL_DECL void duk__patch_trycatch(duk_compiler_ctx *comp_ctx, duk_int_t ldconst_pc, duk_int_t trycatch_pc, duk_regconst_t reg_catch, duk_regconst_t const_varname, duk_small_uint_t flags);
DUK_LOCAL_DECL void duk__emit_if_false_skip(duk_compiler_ctx *comp_ctx, duk_regconst_t regconst);
DUK_LOCAL_DECL void duk__emit_if_true_skip(duk_compiler_ctx *comp_ctx, duk_regconst_t regconst);
DUK_LOCAL_DECL void duk__emit_invalid(duk_compiler_ctx *comp_ctx);
/* ivalue/ispec helpers */
DUK_LOCAL_DECL void duk__copy_ispec(duk_compiler_ctx *comp_ctx, duk_ispec *src, duk_ispec *dst);
DUK_LOCAL_DECL void duk__copy_ivalue(duk_compiler_ctx *comp_ctx, duk_ivalue *src, duk_ivalue *dst);
DUK_LOCAL_DECL duk_bool_t duk__is_whole_get_int32(duk_double_t x, duk_int32_t *ival);
DUK_LOCAL_DECL duk_reg_t duk__alloctemps(duk_compiler_ctx *comp_ctx, duk_small_int_t num);
DUK_LOCAL_DECL duk_reg_t duk__alloctemp(duk_compiler_ctx *comp_ctx);
DUK_LOCAL_DECL void duk__settemp_checkmax(duk_compiler_ctx *comp_ctx, duk_reg_t temp_next);
DUK_LOCAL_DECL duk_regconst_t duk__getconst(duk_compiler_ctx *comp_ctx);
DUK_LOCAL_DECL
duk_regconst_t duk__ispec_toregconst_raw(duk_compiler_ctx *comp_ctx,
duk_ispec *x,
duk_reg_t forced_reg,
duk_small_uint_t flags);
DUK_LOCAL_DECL void duk__ispec_toforcedreg(duk_compiler_ctx *comp_ctx, duk_ispec *x, duk_reg_t forced_reg);
DUK_LOCAL_DECL void duk__ivalue_toplain_raw(duk_compiler_ctx *comp_ctx, duk_ivalue *x, duk_reg_t forced_reg);
DUK_LOCAL_DECL void duk__ivalue_toplain(duk_compiler_ctx *comp_ctx, duk_ivalue *x);
DUK_LOCAL_DECL void duk__ivalue_toplain_ignore(duk_compiler_ctx *comp_ctx, duk_ivalue *x);
DUK_LOCAL_DECL
duk_regconst_t duk__ivalue_toregconst_raw(duk_compiler_ctx *comp_ctx,
duk_ivalue *x,
duk_reg_t forced_reg,
duk_small_uint_t flags);
DUK_LOCAL_DECL duk_reg_t duk__ivalue_toreg(duk_compiler_ctx *comp_ctx, duk_ivalue *x);
#if 0 /* unused */
DUK_LOCAL_DECL duk_reg_t duk__ivalue_totemp(duk_compiler_ctx *comp_ctx, duk_ivalue *x);
#endif
DUK_LOCAL_DECL void duk__ivalue_toforcedreg(duk_compiler_ctx *comp_ctx, duk_ivalue *x, duk_int_t forced_reg);
DUK_LOCAL_DECL duk_regconst_t duk__ivalue_toregconst(duk_compiler_ctx *comp_ctx, duk_ivalue *x);
DUK_LOCAL_DECL duk_regconst_t duk__ivalue_totempconst(duk_compiler_ctx *comp_ctx, duk_ivalue *x);
/* identifier handling */
DUK_LOCAL_DECL duk_reg_t duk__lookup_active_register_binding(duk_compiler_ctx *comp_ctx);
DUK_LOCAL_DECL duk_bool_t duk__lookup_lhs(duk_compiler_ctx *ctx, duk_reg_t *out_reg_varbind, duk_regconst_t *out_rc_varname);
/* label handling */
DUK_LOCAL_DECL void duk__add_label(duk_compiler_ctx *comp_ctx, duk_hstring *h_label, duk_int_t pc_label, duk_int_t label_id);
DUK_LOCAL_DECL void duk__update_label_flags(duk_compiler_ctx *comp_ctx, duk_int_t label_id, duk_small_uint_t flags);
DUK_LOCAL_DECL void duk__lookup_active_label(duk_compiler_ctx *comp_ctx, duk_hstring *h_label, duk_bool_t is_break, duk_int_t *out_label_id, duk_int_t *out_label_catch_depth, duk_int_t *out_label_pc, duk_bool_t *out_is_closest);
DUK_LOCAL_DECL void duk__reset_labels_to_length(duk_compiler_ctx *comp_ctx, duk_int_t len);
/* top-down expression parser */
DUK_LOCAL_DECL void duk__expr_nud(duk_compiler_ctx *comp_ctx, duk_ivalue *res);
DUK_LOCAL_DECL void duk__expr_led(duk_compiler_ctx *comp_ctx, duk_ivalue *left, duk_ivalue *res);
DUK_LOCAL_DECL duk_small_uint_t duk__expr_lbp(duk_compiler_ctx *comp_ctx);
DUK_LOCAL_DECL duk_bool_t duk__expr_is_empty(duk_compiler_ctx *comp_ctx);
/* exprtop is the top level variant which resets nud/led counts */
DUK_LOCAL_DECL void duk__expr(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags);
DUK_LOCAL_DECL void duk__exprtop(duk_compiler_ctx *ctx, duk_ivalue *res, duk_small_uint_t rbp_flags);
/* convenience helpers */
#if 0 /* unused */
DUK_LOCAL_DECL duk_reg_t duk__expr_toreg(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags);
#endif
#if 0 /* unused */
DUK_LOCAL_DECL duk_reg_t duk__expr_totemp(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags);
#endif
DUK_LOCAL_DECL void duk__expr_toforcedreg(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags, duk_reg_t forced_reg);
DUK_LOCAL_DECL duk_regconst_t duk__expr_toregconst(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags);
#if 0 /* unused */
DUK_LOCAL_DECL duk_regconst_t duk__expr_totempconst(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags);
#endif
DUK_LOCAL_DECL void duk__expr_toplain(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags);
DUK_LOCAL_DECL void duk__expr_toplain_ignore(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags);
DUK_LOCAL_DECL duk_reg_t duk__exprtop_toreg(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags);
#if 0 /* unused */
DUK_LOCAL_DECL duk_reg_t duk__exprtop_totemp(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags);
#endif
DUK_LOCAL_DECL void duk__exprtop_toforcedreg(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags, duk_reg_t forced_reg);
DUK_LOCAL_DECL duk_regconst_t duk__exprtop_toregconst(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags);
#if 0 /* unused */
DUK_LOCAL_DECL void duk__exprtop_toplain_ignore(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags);
#endif
/* expression parsing helpers */
DUK_LOCAL_DECL duk_int_t duk__parse_arguments(duk_compiler_ctx *comp_ctx, duk_ivalue *res);
DUK_LOCAL_DECL void duk__nud_array_literal(duk_compiler_ctx *comp_ctx, duk_ivalue *res);
DUK_LOCAL_DECL void duk__nud_object_literal(duk_compiler_ctx *comp_ctx, duk_ivalue *res);
DUK_LOCAL_DECL duk_bool_t duk__nud_object_literal_key_check(duk_compiler_ctx *comp_ctx, duk_small_uint_t new_key_flags);
/* statement parsing */
DUK_LOCAL_DECL void duk__parse_var_decl(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t expr_flags, duk_reg_t *out_reg_varbind, duk_regconst_t *out_rc_varname);
DUK_LOCAL_DECL void duk__parse_var_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t expr_flags);
DUK_LOCAL_DECL void duk__parse_for_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_int_t pc_label_site);
DUK_LOCAL_DECL void duk__parse_switch_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_int_t pc_label_site);
DUK_LOCAL_DECL void duk__parse_if_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res);
DUK_LOCAL_DECL void duk__parse_do_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_int_t pc_label_site);
DUK_LOCAL_DECL void duk__parse_while_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_int_t pc_label_site);
DUK_LOCAL_DECL void duk__parse_break_or_continue_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res);
DUK_LOCAL_DECL void duk__parse_return_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res);
DUK_LOCAL_DECL void duk__parse_throw_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res);
DUK_LOCAL_DECL void duk__parse_try_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res);
DUK_LOCAL_DECL void duk__parse_with_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res);
DUK_LOCAL_DECL void duk__parse_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_bool_t allow_source_elem);
DUK_LOCAL_DECL duk_int_t duk__stmt_label_site(duk_compiler_ctx *comp_ctx, duk_int_t label_id);
DUK_LOCAL_DECL void duk__parse_stmts(duk_compiler_ctx *comp_ctx, duk_bool_t allow_source_elem, duk_bool_t expect_eof);
DUK_LOCAL_DECL void duk__parse_func_body(duk_compiler_ctx *comp_ctx, duk_bool_t expect_eof, duk_bool_t implicit_return_value, duk_small_int_t expect_token);
DUK_LOCAL_DECL void duk__parse_func_formals(duk_compiler_ctx *comp_ctx);
DUK_LOCAL_DECL void duk__parse_func_like_raw(duk_compiler_ctx *comp_ctx, duk_bool_t is_decl, duk_bool_t is_setget);
DUK_LOCAL_DECL duk_int_t duk__parse_func_like_fnum(duk_compiler_ctx *comp_ctx, duk_bool_t is_decl, duk_bool_t is_setget);
/*
* Parser control values for tokens. The token table is ordered by the
* DUK_TOK_XXX defines.
*
* The binding powers are for lbp() use (i.e. for use in led() context).
* Binding powers are positive for typing convenience, and bits at the
* top should be reserved for flags. Binding power step must be higher
* than 1 so that binding power "lbp - 1" can be used for right associative
* operators. Currently a step of 2 is used (which frees one more bit for
* flags).
*/
/* XXX: actually single step levels would work just fine, clean up */
/* binding power "levels" (see doc/compiler.rst) */
#define DUK__BP_INVALID 0 /* always terminates led() */
#define DUK__BP_EOF 2
#define DUK__BP_CLOSING 4 /* token closes expression, e.g. ')', ']' */
#define DUK__BP_FOR_EXPR DUK__BP_CLOSING /* bp to use when parsing a top level Expression */
#define DUK__BP_COMMA 6
#define DUK__BP_ASSIGNMENT 8
#define DUK__BP_CONDITIONAL 10
#define DUK__BP_LOR 12
#define DUK__BP_LAND 14
#define DUK__BP_BOR 16
#define DUK__BP_BXOR 18
#define DUK__BP_BAND 20
#define DUK__BP_EQUALITY 22
#define DUK__BP_RELATIONAL 24
#define DUK__BP_SHIFT 26
#define DUK__BP_ADDITIVE 28
#define DUK__BP_MULTIPLICATIVE 30
#define DUK__BP_POSTFIX 32
#define DUK__BP_CALL 34
#define DUK__BP_MEMBER 36
#define DUK__TOKEN_LBP_BP_MASK 0x1f
#define DUK__TOKEN_LBP_FLAG_NO_REGEXP (1 << 5) /* regexp literal must not follow this token */
#define DUK__TOKEN_LBP_FLAG_TERMINATES (1 << 6) /* terminates expression; e.g. post-increment/-decrement */
#define DUK__TOKEN_LBP_FLAG_UNUSED (1 << 7) /* spare */
#define DUK__TOKEN_LBP_GET_BP(x) ((duk_small_uint_t) (((x) & DUK__TOKEN_LBP_BP_MASK) * 2))
#define DUK__MK_LBP(bp) ((bp) >> 1) /* bp is assumed to be even */
#define DUK__MK_LBP_FLAGS(bp,flags) (((bp) >> 1) | (flags))
DUK_LOCAL const duk_uint8_t duk__token_lbp[] = {
DUK__MK_LBP(DUK__BP_EOF), /* DUK_TOK_EOF */
DUK__MK_LBP_FLAGS(DUK__BP_INVALID, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_IDENTIFIER */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_BREAK */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_CASE */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_CATCH */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_CONTINUE */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_DEBUGGER */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_DEFAULT */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_DELETE */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_DO */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_ELSE */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_FINALLY */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_FOR */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_FUNCTION */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_IF */
DUK__MK_LBP(DUK__BP_RELATIONAL), /* DUK_TOK_IN */
DUK__MK_LBP(DUK__BP_RELATIONAL), /* DUK_TOK_INSTANCEOF */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_NEW */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_RETURN */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_SWITCH */
DUK__MK_LBP_FLAGS(DUK__BP_INVALID, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_THIS */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_THROW */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_TRY */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_TYPEOF */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_VAR */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_CONST */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_VOID */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_WHILE */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_WITH */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_CLASS */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_ENUM */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_EXPORT */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_EXTENDS */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_IMPORT */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_SUPER */
DUK__MK_LBP_FLAGS(DUK__BP_INVALID, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_NULL */
DUK__MK_LBP_FLAGS(DUK__BP_INVALID, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_TRUE */
DUK__MK_LBP_FLAGS(DUK__BP_INVALID, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_FALSE */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_GET */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_SET */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_IMPLEMENTS */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_INTERFACE */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_LET */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_PACKAGE */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_PRIVATE */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_PROTECTED */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_PUBLIC */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_STATIC */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_YIELD */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_LCURLY */
DUK__MK_LBP_FLAGS(DUK__BP_INVALID, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_RCURLY */
DUK__MK_LBP(DUK__BP_MEMBER), /* DUK_TOK_LBRACKET */
DUK__MK_LBP_FLAGS(DUK__BP_CLOSING, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_RBRACKET */
DUK__MK_LBP(DUK__BP_CALL), /* DUK_TOK_LPAREN */
DUK__MK_LBP_FLAGS(DUK__BP_CLOSING, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_RPAREN */
DUK__MK_LBP(DUK__BP_MEMBER), /* DUK_TOK_PERIOD */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_SEMICOLON */
DUK__MK_LBP(DUK__BP_COMMA), /* DUK_TOK_COMMA */
DUK__MK_LBP(DUK__BP_RELATIONAL), /* DUK_TOK_LT */
DUK__MK_LBP(DUK__BP_RELATIONAL), /* DUK_TOK_GT */
DUK__MK_LBP(DUK__BP_RELATIONAL), /* DUK_TOK_LE */
DUK__MK_LBP(DUK__BP_RELATIONAL), /* DUK_TOK_GE */
DUK__MK_LBP(DUK__BP_EQUALITY), /* DUK_TOK_EQ */
DUK__MK_LBP(DUK__BP_EQUALITY), /* DUK_TOK_NEQ */
DUK__MK_LBP(DUK__BP_EQUALITY), /* DUK_TOK_SEQ */
DUK__MK_LBP(DUK__BP_EQUALITY), /* DUK_TOK_SNEQ */
DUK__MK_LBP(DUK__BP_ADDITIVE), /* DUK_TOK_ADD */
DUK__MK_LBP(DUK__BP_ADDITIVE), /* DUK_TOK_SUB */
DUK__MK_LBP(DUK__BP_MULTIPLICATIVE), /* DUK_TOK_MUL */
DUK__MK_LBP(DUK__BP_MULTIPLICATIVE), /* DUK_TOK_DIV */
DUK__MK_LBP(DUK__BP_MULTIPLICATIVE), /* DUK_TOK_MOD */
DUK__MK_LBP(DUK__BP_POSTFIX), /* DUK_TOK_INCREMENT */
DUK__MK_LBP(DUK__BP_POSTFIX), /* DUK_TOK_DECREMENT */
DUK__MK_LBP(DUK__BP_SHIFT), /* DUK_TOK_ALSHIFT */
DUK__MK_LBP(DUK__BP_SHIFT), /* DUK_TOK_ARSHIFT */
DUK__MK_LBP(DUK__BP_SHIFT), /* DUK_TOK_RSHIFT */
DUK__MK_LBP(DUK__BP_BAND), /* DUK_TOK_BAND */
DUK__MK_LBP(DUK__BP_BOR), /* DUK_TOK_BOR */
DUK__MK_LBP(DUK__BP_BXOR), /* DUK_TOK_BXOR */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_LNOT */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_BNOT */
DUK__MK_LBP(DUK__BP_LAND), /* DUK_TOK_LAND */
DUK__MK_LBP(DUK__BP_LOR), /* DUK_TOK_LOR */
DUK__MK_LBP(DUK__BP_CONDITIONAL), /* DUK_TOK_QUESTION */
DUK__MK_LBP(DUK__BP_INVALID), /* DUK_TOK_COLON */
DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_EQUALSIGN */
DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_ADD_EQ */
DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_SUB_EQ */
DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_MUL_EQ */
DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_DIV_EQ */
DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_MOD_EQ */
DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_ALSHIFT_EQ */
DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_ARSHIFT_EQ */
DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_RSHIFT_EQ */
DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_BAND_EQ */
DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_BOR_EQ */
DUK__MK_LBP(DUK__BP_ASSIGNMENT), /* DUK_TOK_BXOR_EQ */
DUK__MK_LBP_FLAGS(DUK__BP_INVALID, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_NUMBER */
DUK__MK_LBP_FLAGS(DUK__BP_INVALID, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_STRING */
DUK__MK_LBP_FLAGS(DUK__BP_INVALID, DUK__TOKEN_LBP_FLAG_NO_REGEXP), /* DUK_TOK_REGEXP */
};
/*
* Misc helpers
*/
DUK_LOCAL void duk__recursion_increase(duk_compiler_ctx *comp_ctx) {
DUK_ASSERT(comp_ctx != NULL);
DUK_ASSERT(comp_ctx->recursion_depth >= 0);
if (comp_ctx->recursion_depth >= comp_ctx->recursion_limit) {
DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_COMPILER_RECURSION_LIMIT);
}
comp_ctx->recursion_depth++;
}
DUK_LOCAL void duk__recursion_decrease(duk_compiler_ctx *comp_ctx) {
DUK_ASSERT(comp_ctx != NULL);
DUK_ASSERT(comp_ctx->recursion_depth > 0);
comp_ctx->recursion_depth--;
}
DUK_LOCAL duk_bool_t duk__hstring_is_eval_or_arguments(duk_compiler_ctx *comp_ctx, duk_hstring *h) {
DUK_UNREF(comp_ctx);
DUK_ASSERT(h != NULL);
return DUK_HSTRING_HAS_EVAL_OR_ARGUMENTS(h);
}
DUK_LOCAL duk_bool_t duk__hstring_is_eval_or_arguments_in_strict_mode(duk_compiler_ctx *comp_ctx, duk_hstring *h) {
DUK_ASSERT(h != NULL);
return (comp_ctx->curr_func.is_strict &&
DUK_HSTRING_HAS_EVAL_OR_ARGUMENTS(h));
}
/*
* Parser duk__advance() token eating functions
*/
/* XXX: valstack handling is awkward. Add a valstack helper which
* avoids dup():ing; valstack_copy(src, dst)?
*/
DUK_LOCAL void duk__advance_helper(duk_compiler_ctx *comp_ctx, duk_small_int_t expect) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_bool_t regexp;
DUK_ASSERT(comp_ctx->curr_token.t >= 0 && comp_ctx->curr_token.t <= DUK_TOK_MAXVAL); /* MAXVAL is inclusive */
/*
* Use current token to decide whether a RegExp can follow.
*
* We can use either 't' or 't_nores'; the latter would not
* recognize keywords. Some keywords can be followed by a
* RegExp (e.g. "return"), so using 't' is better. This is
* not trivial, see doc/compiler.rst.
*/
regexp = 1;
if (duk__token_lbp[comp_ctx->curr_token.t] & DUK__TOKEN_LBP_FLAG_NO_REGEXP) {
regexp = 0;
}
if (comp_ctx->curr_func.reject_regexp_in_adv) {
comp_ctx->curr_func.reject_regexp_in_adv = 0;
regexp = 0;
}
if (expect >= 0 && comp_ctx->curr_token.t != expect) {
DUK_D(DUK_DPRINT("parse error: expect=%ld, got=%ld",
(long) expect, (long) comp_ctx->curr_token.t));
DUK_ERROR_SYNTAX(thr, DUK_STR_PARSE_ERROR);
}
/* make current token the previous; need to fiddle with valstack "backing store" */
DUK_MEMCPY(&comp_ctx->prev_token, &comp_ctx->curr_token, sizeof(duk_token));
duk_copy(ctx, comp_ctx->tok11_idx, comp_ctx->tok21_idx);
duk_copy(ctx, comp_ctx->tok12_idx, comp_ctx->tok22_idx);
/* parse new token */
duk_lexer_parse_js_input_element(&comp_ctx->lex,
&comp_ctx->curr_token,
comp_ctx->curr_func.is_strict,
regexp);
DUK_DDD(DUK_DDDPRINT("advance: curr: tok=%ld/%ld,%ld,term=%ld,%!T,%!T "
"prev: tok=%ld/%ld,%ld,term=%ld,%!T,%!T",
(long) comp_ctx->curr_token.t,
(long) comp_ctx->curr_token.t_nores,
(long) comp_ctx->curr_token.start_line,
(long) comp_ctx->curr_token.lineterm,
(duk_tval *) duk_get_tval(ctx, comp_ctx->tok11_idx),
(duk_tval *) duk_get_tval(ctx, comp_ctx->tok12_idx),
(long) comp_ctx->prev_token.t,
(long) comp_ctx->prev_token.t_nores,
(long) comp_ctx->prev_token.start_line,
(long) comp_ctx->prev_token.lineterm,
(duk_tval *) duk_get_tval(ctx, comp_ctx->tok21_idx),
(duk_tval *) duk_get_tval(ctx, comp_ctx->tok22_idx)));
}
/* advance, expecting current token to be a specific token; parse next token in regexp context */
DUK_LOCAL void duk__advance_expect(duk_compiler_ctx *comp_ctx, duk_small_int_t expect) {
duk__advance_helper(comp_ctx, expect);
}
/* advance, whatever the current token is; parse next token in regexp context */
DUK_LOCAL void duk__advance(duk_compiler_ctx *comp_ctx) {
duk__advance_helper(comp_ctx, -1);
}
/*
* Helpers for duk_compiler_func.
*/
/* init function state: inits valstack allocations */
DUK_LOCAL void duk__init_func_valstack_slots(duk_compiler_ctx *comp_ctx) {
duk_compiler_func *func = &comp_ctx->curr_func;
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_idx_t entry_top;
entry_top = duk_get_top(ctx);
DUK_MEMZERO(func, sizeof(*func)); /* intentional overlap with earlier memzero */
#ifdef DUK_USE_EXPLICIT_NULL_INIT
func->h_name = NULL;
func->h_consts = NULL;
func->h_funcs = NULL;
func->h_decls = NULL;
func->h_labelnames = NULL;
func->h_labelinfos = NULL;
func->h_argnames = NULL;
func->h_varmap = NULL;
#endif
duk_require_stack(ctx, DUK__FUNCTION_INIT_REQUIRE_SLOTS);
DUK_BW_INIT_PUSHBUF(thr, &func->bw_code, DUK__BC_INITIAL_INSTS * sizeof(duk_compiler_instr));
/* code_idx = entry_top + 0 */
duk_push_array(ctx);
func->consts_idx = entry_top + 1;
func->h_consts = DUK_GET_HOBJECT_POSIDX(ctx, entry_top + 1);
DUK_ASSERT(func->h_consts != NULL);
duk_push_array(ctx);
func->funcs_idx = entry_top + 2;
func->h_funcs = DUK_GET_HOBJECT_POSIDX(ctx, entry_top + 2);
DUK_ASSERT(func->h_funcs != NULL);
DUK_ASSERT(func->fnum_next == 0);
duk_push_array(ctx);
func->decls_idx = entry_top + 3;
func->h_decls = DUK_GET_HOBJECT_POSIDX(ctx, entry_top + 3);
DUK_ASSERT(func->h_decls != NULL);
duk_push_array(ctx);
func->labelnames_idx = entry_top + 4;
func->h_labelnames = DUK_GET_HOBJECT_POSIDX(ctx, entry_top + 4);
DUK_ASSERT(func->h_labelnames != NULL);
duk_push_dynamic_buffer(ctx, 0);
func->labelinfos_idx = entry_top + 5;
func->h_labelinfos = (duk_hbuffer_dynamic *) duk_get_hbuffer(ctx, entry_top + 5);
DUK_ASSERT(func->h_labelinfos != NULL);
DUK_ASSERT(DUK_HBUFFER_HAS_DYNAMIC(func->h_labelinfos) && !DUK_HBUFFER_HAS_EXTERNAL(func->h_labelinfos));
duk_push_array(ctx);
func->argnames_idx = entry_top + 6;
func->h_argnames = DUK_GET_HOBJECT_POSIDX(ctx, entry_top + 6);
DUK_ASSERT(func->h_argnames != NULL);
duk_push_object_internal(ctx);
func->varmap_idx = entry_top + 7;
func->h_varmap = DUK_GET_HOBJECT_POSIDX(ctx, entry_top + 7);
DUK_ASSERT(func->h_varmap != NULL);
}
/* reset function state (prepare for pass 2) */
DUK_LOCAL void duk__reset_func_for_pass2(duk_compiler_ctx *comp_ctx) {
duk_compiler_func *func = &comp_ctx->curr_func;
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
/* reset bytecode buffer but keep current size; pass 2 will
* require same amount or more.
*/
DUK_BW_RESET_SIZE(thr, &func->bw_code);
duk_hobject_set_length_zero(thr, func->h_consts);
/* keep func->h_funcs; inner functions are not reparsed to avoid O(depth^2) parsing */
func->fnum_next = 0;
/* duk_hobject_set_length_zero(thr, func->h_funcs); */
duk_hobject_set_length_zero(thr, func->h_labelnames);
duk_hbuffer_reset(thr, func->h_labelinfos);
/* keep func->h_argnames; it is fixed for all passes */
/* truncated in case pass 3 needed */
duk_push_object_internal(ctx);
duk_replace(ctx, func->varmap_idx);
func->h_varmap = DUK_GET_HOBJECT_POSIDX(ctx, func->varmap_idx);
DUK_ASSERT(func->h_varmap != NULL);
}
/* cleanup varmap from any null entries, compact it, etc; returns number
* of final entries after cleanup.
*/
DUK_LOCAL duk_int_t duk__cleanup_varmap(duk_compiler_ctx *comp_ctx) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_hobject *h_varmap;
duk_hstring *h_key;
duk_tval *tv;
duk_uint32_t i, e_next;
duk_int_t ret;
/* [ ... varmap ] */
h_varmap = DUK_GET_HOBJECT_NEGIDX(ctx, -1);
DUK_ASSERT(h_varmap != NULL);
ret = 0;
e_next = DUK_HOBJECT_GET_ENEXT(h_varmap);
for (i = 0; i < e_next; i++) {
h_key = DUK_HOBJECT_E_GET_KEY(thr->heap, h_varmap, i);
if (!h_key) {
continue;
}
DUK_ASSERT(!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, h_varmap, i));
/* The entries can either be register numbers or 'null' values.
* Thus, no need to DECREF them and get side effects. DECREF'ing
* the keys (strings) can cause memory to be freed but no side
* effects as strings don't have finalizers. This is why we can
* rely on the object properties not changing from underneath us.
*/
tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, h_varmap, i);
if (!DUK_TVAL_IS_NUMBER(tv)) {
DUK_ASSERT(!DUK_TVAL_IS_HEAP_ALLOCATED(tv));
DUK_HOBJECT_E_SET_KEY(thr->heap, h_varmap, i, NULL);
DUK_HSTRING_DECREF(thr, h_key);
/* when key is NULL, value is garbage so no need to set */
} else {
ret++;
}
}
duk_compact(ctx, -1);
return ret;
}
/* convert duk_compiler_func into a function template, leaving the result
* on top of stack.
*/
/* XXX: awkward and bloated asm -- use faster internal accesses */
DUK_LOCAL void duk__convert_to_func_template(duk_compiler_ctx *comp_ctx, duk_bool_t force_no_namebind) {
duk_compiler_func *func = &comp_ctx->curr_func;
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_hcompiledfunction *h_res;
duk_hbuffer_fixed *h_data;
duk_size_t consts_count;
duk_size_t funcs_count;
duk_size_t code_count;
duk_size_t code_size;
duk_size_t data_size;
duk_size_t i;
duk_tval *p_const;
duk_hobject **p_func;
duk_instr_t *p_instr;
duk_compiler_instr *q_instr;
duk_tval *tv;
DUK_DDD(DUK_DDDPRINT("converting duk_compiler_func to function/template"));
/*
* Push result object and init its flags
*/
/* Valstack should suffice here, required on function valstack init */
(void) duk_push_compiledfunction(ctx);
h_res = (duk_hcompiledfunction *) DUK_GET_HOBJECT_NEGIDX(ctx, -1); /* XXX: specific getter */
DUK_ASSERT(h_res != NULL);
if (func->is_function) {
DUK_DDD(DUK_DDDPRINT("function -> set NEWENV"));
DUK_HOBJECT_SET_NEWENV((duk_hobject *) h_res);
if (!func->is_arguments_shadowed) {
/* arguments object would be accessible; note that shadowing
* bindings are arguments or function declarations, neither
* of which are deletable, so this is safe.
*/
if (func->id_access_arguments || func->may_direct_eval) {
DUK_DDD(DUK_DDDPRINT("function may access 'arguments' object directly or "
"indirectly -> set CREATEARGS"));
DUK_HOBJECT_SET_CREATEARGS((duk_hobject *) h_res);
}
}
} else if (func->is_eval && func->is_strict) {
DUK_DDD(DUK_DDDPRINT("strict eval code -> set NEWENV"));
DUK_HOBJECT_SET_NEWENV((duk_hobject *) h_res);
} else {
/* non-strict eval: env is caller's env or global env (direct vs. indirect call)
* global code: env is is global env
*/
DUK_DDD(DUK_DDDPRINT("non-strict eval code or global code -> no NEWENV"));
DUK_ASSERT(!DUK_HOBJECT_HAS_NEWENV((duk_hobject *) h_res));
}
if (func->is_function && !func->is_decl && func->h_name != NULL && !force_no_namebind) {
/* Object literal set/get functions have a name (property
* name) but must not have a lexical name binding, see
* test-bug-getset-func-name.js.
*/
DUK_DDD(DUK_DDDPRINT("function expression with a name -> set NAMEBINDING"));
DUK_HOBJECT_SET_NAMEBINDING((duk_hobject *) h_res);
}
if (func->is_strict) {
DUK_DDD(DUK_DDDPRINT("function is strict -> set STRICT"));
DUK_HOBJECT_SET_STRICT((duk_hobject *) h_res);
}
if (func->is_notail) {
DUK_DDD(DUK_DDDPRINT("function is notail -> set NOTAIL"));
DUK_HOBJECT_SET_NOTAIL((duk_hobject *) h_res);
}
/*
* Build function fixed size 'data' buffer, which contains bytecode,
* constants, and inner function references.
*
* During the building phase 'data' is reachable but incomplete.
* Only incref's occur during building (no refzero or GC happens),
* so the building process is atomic.
*/
consts_count = duk_hobject_get_length(thr, func->h_consts);
funcs_count = duk_hobject_get_length(thr, func->h_funcs) / 3;
code_count = DUK_BW_GET_SIZE(thr, &func->bw_code) / sizeof(duk_compiler_instr);
code_size = code_count * sizeof(duk_instr_t);
data_size = consts_count * sizeof(duk_tval) +
funcs_count * sizeof(duk_hobject *) +
code_size;
DUK_DDD(DUK_DDDPRINT("consts_count=%ld, funcs_count=%ld, code_size=%ld -> "
"data_size=%ld*%ld + %ld*%ld + %ld = %ld",
(long) consts_count, (long) funcs_count, (long) code_size,
(long) consts_count, (long) sizeof(duk_tval),
(long) funcs_count, (long) sizeof(duk_hobject *),
(long) code_size, (long) data_size));
duk_push_fixed_buffer(ctx, data_size);
h_data = (duk_hbuffer_fixed *) duk_get_hbuffer(ctx, -1);
DUK_ASSERT(h_data != NULL);
DUK_HCOMPILEDFUNCTION_SET_DATA(thr->heap, h_res, (duk_hbuffer *) h_data);
DUK_HEAPHDR_INCREF(thr, h_data);
p_const = (duk_tval *) (void *) DUK_HBUFFER_FIXED_GET_DATA_PTR(thr->heap, h_data);
for (i = 0; i < consts_count; i++) {
DUK_ASSERT(i <= DUK_UARRIDX_MAX); /* const limits */
tv = duk_hobject_find_existing_array_entry_tval_ptr(thr->heap, func->h_consts, (duk_uarridx_t) i);
DUK_ASSERT(tv != NULL);
DUK_TVAL_SET_TVAL(p_const, tv);
p_const++;
DUK_TVAL_INCREF(thr, tv); /* may be a string constant */
DUK_DDD(DUK_DDDPRINT("constant: %!T", (duk_tval *) tv));
}
p_func = (duk_hobject **) p_const;
DUK_HCOMPILEDFUNCTION_SET_FUNCS(thr->heap, h_res, p_func);
for (i = 0; i < funcs_count; i++) {
duk_hobject *h;
DUK_ASSERT(i * 3 <= DUK_UARRIDX_MAX); /* func limits */
tv = duk_hobject_find_existing_array_entry_tval_ptr(thr->heap, func->h_funcs, (duk_uarridx_t) (i * 3));
DUK_ASSERT(tv != NULL);
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv));
h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION(h));
*p_func++ = h;
DUK_HOBJECT_INCREF(thr, h);
DUK_DDD(DUK_DDDPRINT("inner function: %p -> %!iO",
(void *) h, (duk_heaphdr *) h));
}
p_instr = (duk_instr_t *) p_func;
DUK_HCOMPILEDFUNCTION_SET_BYTECODE(thr->heap, h_res, p_instr);
/* copy bytecode instructions one at a time */
q_instr = (duk_compiler_instr *) (void *) DUK_BW_GET_BASEPTR(thr, &func->bw_code);
for (i = 0; i < code_count; i++) {
p_instr[i] = q_instr[i].ins;
}
/* Note: 'q_instr' is still used below */
DUK_ASSERT((duk_uint8_t *) (p_instr + code_count) == DUK_HBUFFER_FIXED_GET_DATA_PTR(thr->heap, h_data) + data_size);
duk_pop(ctx); /* 'data' (and everything in it) is reachable through h_res now */
/*
* Init object properties
*
* Properties should be added in decreasing order of access frequency.
* (Not very critical for function templates.)
*/
DUK_DDD(DUK_DDDPRINT("init function properties"));
/* [ ... res ] */
/* _Varmap: omitted if function is guaranteed not to do slow path identifier
* accesses or if it would turn out to be empty of actual register mappings
* after a cleanup. When debugging is enabled, we always need the varmap to
* be able to lookup variables at any point.
*/
#if defined(DUK_USE_DEBUGGER_SUPPORT)
if (1) {
#else
if (func->id_access_slow || /* directly uses slow accesses */
func->may_direct_eval || /* may indirectly slow access through a direct eval */
funcs_count > 0) { /* has inner functions which may slow access (XXX: this can be optimized by looking at the inner functions) */
#endif
duk_int_t num_used;
duk_dup(ctx, func->varmap_idx);
num_used = duk__cleanup_varmap(comp_ctx);
DUK_DDD(DUK_DDDPRINT("cleaned up varmap: %!T (num_used=%ld)",
(duk_tval *) duk_get_tval(ctx, -1), (long) num_used));
if (num_used > 0) {
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_VARMAP, DUK_PROPDESC_FLAGS_NONE);
} else {
DUK_DDD(DUK_DDDPRINT("varmap is empty after cleanup -> no need to add"));
duk_pop(ctx);
}
}
/* _Formals: omitted if function is guaranteed not to need a (non-strict) arguments object */
if (1) {
/* XXX: Add a proper condition. If formals list is omitted, recheck
* handling for 'length' in duk_js_push_closure(); it currently relies
* on _Formals being set. Removal may need to be conditional to debugging
* being enabled/disabled too.
*/
duk_dup(ctx, func->argnames_idx);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_FORMALS, DUK_PROPDESC_FLAGS_NONE);
}
/* name */
if (func->h_name) {
duk_push_hstring(ctx, func->h_name);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_NONE);
}
/* _Source */
#if defined(DUK_USE_NONSTD_FUNC_SOURCE_PROPERTY)
if (0) {
/* XXX: Currently function source code is not stored, as it is not
* required by the standard. Source code should not be stored by
* default (user should enable it explicitly), and the source should
* probably be compressed with a trivial text compressor; average
* compression of 20-30% is quite easy to achieve even with a trivial
* compressor (RLE + backwards lookup).
*
* Debugging needs source code to be useful: sometimes input code is
* not found in files as it may be generated and then eval()'d, given
* by dynamic C code, etc.
*
* Other issues:
*
* - Need tokenizer indices for start and end to substring
* - Always normalize function declaration part?
* - If we keep _Formals, only need to store body
*/
/*
* For global or eval code this is straightforward. For functions
* created with the Function constructor we only get the source for
* the body and must manufacture the "function ..." part.
*
* For instance, for constructed functions (v8):
*
* > a = new Function("foo", "bar", "print(foo)");
* [Function]
* > a.toString()
* 'function anonymous(foo,bar) {\nprint(foo)\n}'
*
* Similarly for e.g. getters (v8):
*
* > x = { get a(foo,bar) { print(foo); } }
* { a: [Getter] }
* > Object.getOwnPropertyDescriptor(x, 'a').get.toString()
* 'function a(foo,bar) { print(foo); }'
*/
#if 0
duk_push_string(ctx, "XXX");
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_SOURCE, DUK_PROPDESC_FLAGS_NONE);
#endif
}
#endif /* DUK_USE_NONSTD_FUNC_SOURCE_PROPERTY */
/* _Pc2line */
#if defined(DUK_USE_PC2LINE)
if (1) {
/*
* Size-optimized pc->line mapping.
*/
DUK_ASSERT(code_count <= DUK_COMPILER_MAX_BYTECODE_LENGTH);
duk_hobject_pc2line_pack(thr, q_instr, (duk_uint_fast32_t) code_count); /* -> pushes fixed buffer */
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_INT_PC2LINE, DUK_PROPDESC_FLAGS_NONE);
/* XXX: if assertions enabled, walk through all valid PCs
* and check line mapping.
*/
}
#endif /* DUK_USE_PC2LINE */
/* fileName */
if (comp_ctx->h_filename) {
/*
* Source filename (or equivalent), for identifying thrown errors.
*/
duk_push_hstring(ctx, comp_ctx->h_filename);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_FILE_NAME, DUK_PROPDESC_FLAGS_NONE);
}
/*
* Init remaining result fields
*
* 'nregs' controls how large a register frame is allocated.
*
* 'nargs' controls how many formal arguments are written to registers:
* r0, ... r(nargs-1). The remaining registers are initialized to
* undefined.
*/
DUK_ASSERT(func->temp_max >= 0);
h_res->nregs = (duk_uint16_t) func->temp_max;
h_res->nargs = (duk_uint16_t) duk_hobject_get_length(thr, func->h_argnames);
DUK_ASSERT(h_res->nregs >= h_res->nargs); /* pass2 allocation handles this */
#if defined(DUK_USE_DEBUGGER_SUPPORT)
h_res->start_line = (duk_uint32_t) func->min_line;
h_res->end_line = (duk_uint32_t) func->max_line;
#endif
DUK_DD(DUK_DDPRINT("converted function: %!ixT",
(duk_tval *) duk_get_tval(ctx, -1)));
/*
* Compact the function template.
*/
duk_compact(ctx, -1);
/*
* Debug dumping
*/
#ifdef DUK_USE_DDDPRINT
{
duk_hcompiledfunction *h;
duk_instr_t *p, *p_start, *p_end;
h = (duk_hcompiledfunction *) duk_get_hobject(ctx, -1);
p_start = (duk_instr_t *) DUK_HCOMPILEDFUNCTION_GET_CODE_BASE(thr->heap, h);
p_end = (duk_instr_t *) DUK_HCOMPILEDFUNCTION_GET_CODE_END(thr->heap, h);
p = p_start;
while (p < p_end) {
DUK_DDD(DUK_DDDPRINT("BC %04ld: %!I ; 0x%08lx op=%ld (%!C) a=%ld b=%ld c=%ld",
(long) (p - p_start),
(duk_instr_t) (*p),
(unsigned long) (*p),
(long) DUK_DEC_OP(*p),
(long) DUK_DEC_OP(*p),
(long) DUK_DEC_A(*p),
(long) DUK_DEC_B(*p),
(long) DUK_DEC_C(*p)));
p++;
}
}
#endif
}
/*
* Code emission helpers
*
* Some emission helpers understand the range of target and source reg/const
* values and automatically emit shuffling code if necessary. This is the
* case when the slot in question (A, B, C) is used in the standard way and
* for opcodes the emission helpers explicitly understand (like DUK_OP_CALL).
*
* The standard way is that:
* - slot A is a target register
* - slot B is a source register/constant
* - slot C is a source register/constant
*
* If a slot is used in a non-standard way the caller must indicate this
* somehow. If a slot is used as a target instead of a source (or vice
* versa), this can be indicated with a flag to trigger proper shuffling
* (e.g. DUK__EMIT_FLAG_B_IS_TARGET). If the value in the slot is not
* register/const related at all, the caller must ensure that the raw value
* fits into the corresponding slot so as to not trigger shuffling. The
* caller must set a "no shuffle" flag to ensure compilation fails if
* shuffling were to be triggered because of an internal error.
*
* For slots B and C the raw slot size is 9 bits but one bit is reserved for
* the reg/const indicator. To use the full 9-bit range for a raw value,
* shuffling must be disabled with the DUK__EMIT_FLAG_NO_SHUFFLE_{B,C} flag.
* Shuffling is only done for A, B, and C slots, not the larger BC or ABC slots.
*
* There is call handling specific understanding in the A-B-C emitter to
* convert call setup and call instructions into indirect ones if necessary.
*/
/* Code emission flags, passed in the 'opcode' field. Opcode + flags
* fit into 16 bits for now, so use duk_small_uint.t.
*/
#define DUK__EMIT_FLAG_NO_SHUFFLE_A (1 << 8)
#define DUK__EMIT_FLAG_NO_SHUFFLE_B (1 << 9)
#define DUK__EMIT_FLAG_NO_SHUFFLE_C (1 << 10)
#define DUK__EMIT_FLAG_A_IS_SOURCE (1 << 11) /* slot A is a source (default: target) */
#define DUK__EMIT_FLAG_B_IS_TARGET (1 << 12) /* slot B is a target (default: source) */
#define DUK__EMIT_FLAG_C_IS_TARGET (1 << 13) /* slot C is a target (default: source) */
#define DUK__EMIT_FLAG_B_IS_TARGETSOURCE (1 << 14) /* slot B is both a target and a source (used by extraops like DUK_EXTRAOP_INSTOF */
#define DUK__EMIT_FLAG_RESERVE_JUMPSLOT (1 << 15) /* reserve a jumpslot after instr before target spilling, used for NEXTENUM */
/* XXX: clarify on when and where DUK__CONST_MARKER is allowed */
/* XXX: opcode specific assertions on when consts are allowed */
/* XXX: macro smaller than call? */
DUK_LOCAL duk_int_t duk__get_current_pc(duk_compiler_ctx *comp_ctx) {
duk_compiler_func *func;
func = &comp_ctx->curr_func;
return (duk_int_t) (DUK_BW_GET_SIZE(comp_ctx->thr, &func->bw_code) / sizeof(duk_compiler_instr));
}
DUK_LOCAL duk_compiler_instr *duk__get_instr_ptr(duk_compiler_ctx *comp_ctx, duk_int_t pc) {
DUK_ASSERT(pc >= 0);
DUK_ASSERT((duk_size_t) pc < (duk_size_t) (DUK_BW_GET_SIZE(comp_ctx->thr, &comp_ctx->curr_func.bw_code) / sizeof(duk_compiler_instr)));
return ((duk_compiler_instr *) (void *) DUK_BW_GET_BASEPTR(comp_ctx->thr, &comp_ctx->curr_func.bw_code)) + pc;
}
/* emit instruction; could return PC but that's not needed in the majority
* of cases.
*/
DUK_LOCAL void duk__emit(duk_compiler_ctx *comp_ctx, duk_instr_t ins) {
#if defined(DUK_USE_PC2LINE)
duk_int_t line;
#endif
duk_compiler_instr *instr;
DUK_DDD(DUK_DDDPRINT("duk__emit: 0x%08lx curr_token.start_line=%ld prev_token.start_line=%ld pc=%ld --> %!I",
(unsigned long) ins,
(long) comp_ctx->curr_token.start_line,
(long) comp_ctx->prev_token.start_line,
(long) duk__get_current_pc(comp_ctx),
(duk_instr_t) ins));
instr = (duk_compiler_instr *) (void *) DUK_BW_ENSURE_GETPTR(comp_ctx->thr, &comp_ctx->curr_func.bw_code, sizeof(duk_compiler_instr));
DUK_BW_ADD_PTR(comp_ctx->thr, &comp_ctx->curr_func.bw_code, sizeof(duk_compiler_instr));
#if defined(DUK_USE_PC2LINE)
/* The line number tracking is a bit inconsistent right now, which
* affects debugger accuracy. Mostly call sites emit opcodes when
* they have parsed a token (say a terminating semicolon) and called
* duk__advance(). In this case the line number of the previous
* token is the most accurate one (except in prologue where
* prev_token.start_line is 0). This is probably not 100% correct
* right now.
*/
/* approximation, close enough */
line = comp_ctx->prev_token.start_line;
if (line == 0) {
line = comp_ctx->curr_token.start_line;
}
#endif
instr->ins = ins;
#if defined(DUK_USE_PC2LINE)
instr->line = line;
#endif
#if defined(DUK_USE_DEBUGGER_SUPPORT)
if (line < comp_ctx->curr_func.min_line) {
comp_ctx->curr_func.min_line = line;
}
if (line > comp_ctx->curr_func.max_line) {
comp_ctx->curr_func.max_line = line;
}
#endif
/* Limit checks for bytecode byte size and line number. */
if (DUK_UNLIKELY(DUK_BW_GET_SIZE(comp_ctx->thr, &comp_ctx->curr_func.bw_code) > DUK_USE_ESBC_MAX_BYTES)) {
goto fail_bc_limit;
}
#if defined(DUK_USE_PC2LINE) && defined(DUK_USE_ESBC_LIMITS)
#if defined(DUK_USE_BUFLEN16)
/* Buffer length is bounded to 0xffff automatically, avoid compile warning. */
if (DUK_UNLIKELY(line > DUK_USE_ESBC_MAX_LINENUMBER)) {
goto fail_bc_limit;
}
#else
if (DUK_UNLIKELY(line > DUK_USE_ESBC_MAX_LINENUMBER)) {
goto fail_bc_limit;
}
#endif
#endif
return;
fail_bc_limit:
DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_BYTECODE_LIMIT);
}
/* Update function min/max line from current token. Needed to improve
* function line range information for debugging, so that e.g. opening
* curly brace is covered by line range even when no opcodes are emitted
* for the line containing the brace.
*/
DUK_LOCAL void duk__update_lineinfo_currtoken(duk_compiler_ctx *comp_ctx) {
#if defined(DUK_USE_DEBUGGER_SUPPORT)
duk_int_t line;
line = comp_ctx->curr_token.start_line;
if (line == 0) {
return;
}
if (line < comp_ctx->curr_func.min_line) {
comp_ctx->curr_func.min_line = line;
}
if (line > comp_ctx->curr_func.max_line) {
comp_ctx->curr_func.max_line = line;
}
#else
DUK_UNREF(comp_ctx);
#endif
}
#if 0 /* unused */
DUK_LOCAL void duk__emit_op_only(duk_compiler_ctx *comp_ctx, duk_small_uint_t op) {
duk__emit(comp_ctx, DUK_ENC_OP_ABC(op, 0));
}
#endif
/* Important main primitive. */
DUK_LOCAL void duk__emit_a_b_c(duk_compiler_ctx *comp_ctx, duk_small_uint_t op_flags, duk_regconst_t a, duk_regconst_t b, duk_regconst_t c) {
duk_instr_t ins = 0;
duk_int_t a_out = -1;
duk_int_t b_out = -1;
duk_int_t c_out = -1;
duk_int_t tmp;
DUK_DDD(DUK_DDDPRINT("emit: op_flags=%04lx, a=%ld, b=%ld, c=%ld",
(unsigned long) op_flags, (long) a, (long) b, (long) c));
/* We could rely on max temp/const checks: if they don't exceed BC
* limit, nothing here can either (just asserts would be enough).
* Currently we check for the limits, which provides additional
* protection against creating invalid bytecode due to compiler
* bugs.
*/
DUK_ASSERT_DISABLE((op_flags & 0xff) >= DUK_BC_OP_MIN); /* unsigned */
DUK_ASSERT((op_flags & 0xff) <= DUK_BC_OP_MAX);
/* Input shuffling happens before the actual operation, while output
* shuffling happens afterwards. Output shuffling decisions are still
* made at the same time to reduce branch clutter; output shuffle decisions
* are recorded into X_out variables.
*/
/* Slot A */
#if defined(DUK_USE_SHUFFLE_TORTURE)
if (a <= DUK_BC_A_MAX && (op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_A)) {
#else
if (a <= DUK_BC_A_MAX) {
#endif
;
} else if (op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_A) {
DUK_D(DUK_DPRINT("out of regs: 'a' (reg) needs shuffling but shuffle prohibited, a: %ld", (long) a));
goto error_outofregs;
} else if (a <= DUK_BC_BC_MAX) {
comp_ctx->curr_func.needs_shuffle = 1;
tmp = comp_ctx->curr_func.shuffle1;
if (op_flags & DUK__EMIT_FLAG_A_IS_SOURCE) {
duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_LDREG, tmp, a));
} else {
duk_small_int_t op = op_flags & 0xff;
if (op == DUK_OP_CSVAR || op == DUK_OP_CSREG || op == DUK_OP_CSPROP) {
/* Special handling for call setup instructions. The target
* is expressed indirectly, but there is no output shuffling.
*/
DUK_ASSERT((op_flags & DUK__EMIT_FLAG_A_IS_SOURCE) == 0);
duk__emit_load_int32_noshuffle(comp_ctx, tmp, a);
DUK_ASSERT(DUK_OP_CSVARI == DUK_OP_CSVAR + 1);
DUK_ASSERT(DUK_OP_CSREGI == DUK_OP_CSREG + 1);
DUK_ASSERT(DUK_OP_CSPROPI == DUK_OP_CSPROP + 1);
op_flags++; /* indirect opcode follows direct */
} else {
/* Output shuffle needed after main operation */
a_out = a;
}
}
a = tmp;
} else {
DUK_D(DUK_DPRINT("out of regs: 'a' (reg) needs shuffling but does not fit into BC, a: %ld", (long) a));
goto error_outofregs;
}
/* Slot B */
if (b & DUK__CONST_MARKER) {
DUK_ASSERT((op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_B) == 0);
DUK_ASSERT((op_flags & DUK__EMIT_FLAG_B_IS_TARGET) == 0);
DUK_ASSERT((op_flags & 0xff) != DUK_OP_CALL);
DUK_ASSERT((op_flags & 0xff) != DUK_OP_NEW);
b = b & ~DUK__CONST_MARKER;
#if defined(DUK_USE_SHUFFLE_TORTURE)
if (0) {
#else
if (b <= 0xff) {
#endif
ins |= DUK_ENC_OP_A_B_C(0, 0, 0x100, 0); /* const flag for B */
} else if (b <= DUK_BC_BC_MAX) {
comp_ctx->curr_func.needs_shuffle = 1;
tmp = comp_ctx->curr_func.shuffle2;
duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_LDCONST, tmp, b));
b = tmp;
} else {
DUK_D(DUK_DPRINT("out of regs: 'b' (const) needs shuffling but does not fit into BC, b: %ld", (long) b));
goto error_outofregs;
}
} else {
#if defined(DUK_USE_SHUFFLE_TORTURE)
if (b <= 0xff && (op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_B)) {
#else
if (b <= 0xff) {
#endif
;
} else if (op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_B) {
if (b > DUK_BC_B_MAX) {
/* Note: 0xff != DUK_BC_B_MAX */
DUK_D(DUK_DPRINT("out of regs: 'b' (reg) needs shuffling but shuffle prohibited, b: %ld", (long) b));
goto error_outofregs;
}
} else if (b <= DUK_BC_BC_MAX) {
comp_ctx->curr_func.needs_shuffle = 1;
tmp = comp_ctx->curr_func.shuffle2;
if (op_flags & DUK__EMIT_FLAG_B_IS_TARGET) {
/* Output shuffle needed after main operation */
b_out = b;
}
if (!(op_flags & DUK__EMIT_FLAG_B_IS_TARGET) || (op_flags & DUK__EMIT_FLAG_B_IS_TARGETSOURCE)) {
duk_small_int_t op = op_flags & 0xff;
if (op == DUK_OP_CALL || op == DUK_OP_NEW ||
op == DUK_OP_MPUTOBJ || op == DUK_OP_MPUTARR) {
/* Special handling for CALL/NEW/MPUTOBJ/MPUTARR shuffling.
* For each, slot B identifies the first register of a range
* of registers, so normal shuffling won't work. Instead,
* an indirect version of the opcode is used.
*/
DUK_ASSERT((op_flags & DUK__EMIT_FLAG_B_IS_TARGET) == 0);
duk__emit_load_int32_noshuffle(comp_ctx, tmp, b);
DUK_ASSERT(DUK_OP_CALLI == DUK_OP_CALL + 1);
DUK_ASSERT(DUK_OP_NEWI == DUK_OP_NEW + 1);
DUK_ASSERT(DUK_OP_MPUTOBJI == DUK_OP_MPUTOBJ + 1);
DUK_ASSERT(DUK_OP_MPUTARRI == DUK_OP_MPUTARR + 1);
op_flags++; /* indirect opcode follows direct */
} else {
duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_LDREG, tmp, b));
}
}
b = tmp;
} else {
DUK_D(DUK_DPRINT("out of regs: 'b' (reg) needs shuffling but does not fit into BC, b: %ld", (long) b));
goto error_outofregs;
}
}
/* Slot C */
if (c & DUK__CONST_MARKER) {
DUK_ASSERT((op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_C) == 0);
DUK_ASSERT((op_flags & DUK__EMIT_FLAG_C_IS_TARGET) == 0);
c = c & ~DUK__CONST_MARKER;
#if defined(DUK_USE_SHUFFLE_TORTURE)
if (0) {
#else
if (c <= 0xff) {
#endif
ins |= DUK_ENC_OP_A_B_C(0, 0, 0, 0x100); /* const flag for C */
} else if (c <= DUK_BC_BC_MAX) {
comp_ctx->curr_func.needs_shuffle = 1;
tmp = comp_ctx->curr_func.shuffle3;
duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_LDCONST, tmp, c));
c = tmp;
} else {
DUK_D(DUK_DPRINT("out of regs: 'c' (const) needs shuffling but does not fit into BC, c: %ld", (long) c));
goto error_outofregs;
}
} else {
#if defined(DUK_USE_SHUFFLE_TORTURE)
if (c <= 0xff && (op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_C)) {
#else
if (c <= 0xff) {
#endif
;
} else if (op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_C) {
if (c > DUK_BC_C_MAX) {
/* Note: 0xff != DUK_BC_C_MAX */
DUK_D(DUK_DPRINT("out of regs: 'c' (reg) needs shuffling but shuffle prohibited, c: %ld", (long) c));
goto error_outofregs;
}
} else if (c <= DUK_BC_BC_MAX) {
comp_ctx->curr_func.needs_shuffle = 1;
tmp = comp_ctx->curr_func.shuffle3;
if (op_flags & DUK__EMIT_FLAG_C_IS_TARGET) {
/* Output shuffle needed after main operation */
c_out = c;
} else {
duk_small_int_t op = op_flags & 0xff;
if (op == DUK_OP_EXTRA &&
(a == DUK_EXTRAOP_INITGET || a == DUK_EXTRAOP_INITSET)) {
/* Special shuffling for INITGET/INITSET, where slot C
* identifies a register pair and cannot be shuffled
* normally. Use an indirect variant instead.
*/
DUK_ASSERT((op_flags & DUK__EMIT_FLAG_C_IS_TARGET) == 0);
duk__emit_load_int32_noshuffle(comp_ctx, tmp, c);
DUK_ASSERT(DUK_EXTRAOP_INITGETI == DUK_EXTRAOP_INITGET + 1);
DUK_ASSERT(DUK_EXTRAOP_INITSETI == DUK_EXTRAOP_INITSET + 1);
a++; /* indirect opcode follows direct */
} else {
duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_LDREG, tmp, c));
}
}
c = tmp;
} else {
DUK_D(DUK_DPRINT("out of regs: 'c' (reg) needs shuffling but does not fit into BC, c: %ld", (long) c));
goto error_outofregs;
}
}
/* Main operation */
DUK_ASSERT_DISABLE(a >= DUK_BC_A_MIN); /* unsigned */
DUK_ASSERT(a <= DUK_BC_A_MAX);
DUK_ASSERT_DISABLE(b >= DUK_BC_B_MIN); /* unsigned */
DUK_ASSERT(b <= DUK_BC_B_MAX);
DUK_ASSERT_DISABLE(c >= DUK_BC_C_MIN); /* unsigned */
DUK_ASSERT(c <= DUK_BC_C_MAX);
ins |= DUK_ENC_OP_A_B_C(op_flags & 0xff, a, b, c);
duk__emit(comp_ctx, ins);
/* NEXTENUM needs a jump slot right after the main instruction.
* When the JUMP is taken, output spilling is not needed so this
* workaround is possible. The jump slot PC is exceptionally
* plumbed through comp_ctx to minimize call sites.
*/
if (op_flags & DUK__EMIT_FLAG_RESERVE_JUMPSLOT) {
comp_ctx->emit_jumpslot_pc = duk__get_current_pc(comp_ctx);
duk__emit_abc(comp_ctx, DUK_OP_JUMP, 0);
}
/* Output shuffling: only one output register is realistically possible.
*
* (Zero would normally be an OK marker value: if the target register
* was zero, it would never be shuffled. But with DUK_USE_SHUFFLE_TORTURE
* this is no longer true, so use -1 as a marker instead.)
*/
if (a_out >= 0) {
DUK_ASSERT(b_out < 0);
DUK_ASSERT(c_out < 0);
duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_STREG, a, a_out));
} else if (b_out >= 0) {
DUK_ASSERT(a_out < 0);
DUK_ASSERT(c_out < 0);
duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_STREG, b, b_out));
} else if (c_out >= 0) {
DUK_ASSERT(b_out < 0);
DUK_ASSERT(c_out < 0);
duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_STREG, c, c_out));
}
return;
error_outofregs:
DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_REG_LIMIT);
}
DUK_LOCAL void duk__emit_a_b(duk_compiler_ctx *comp_ctx, duk_small_uint_t op_flags, duk_regconst_t a, duk_regconst_t b) {
duk__emit_a_b_c(comp_ctx, op_flags | DUK__EMIT_FLAG_NO_SHUFFLE_C, a, b, 0);
}
#if 0 /* unused */
DUK_LOCAL void duk__emit_a(duk_compiler_ctx *comp_ctx, int op_flags, int a) {
duk__emit_a_b_c(comp_ctx, op_flags | DUK__EMIT_FLAG_NO_SHUFFLE_B | DUK__EMIT_FLAG_NO_SHUFFLE_C, a, 0, 0);
}
#endif
DUK_LOCAL void duk__emit_a_bc(duk_compiler_ctx *comp_ctx, duk_small_uint_t op_flags, duk_regconst_t a, duk_regconst_t bc) {
duk_instr_t ins;
duk_int_t tmp;
/* allow caller to give a const number with the DUK__CONST_MARKER */
bc = bc & (~DUK__CONST_MARKER);
DUK_ASSERT_DISABLE((op_flags & 0xff) >= DUK_BC_OP_MIN); /* unsigned */
DUK_ASSERT((op_flags & 0xff) <= DUK_BC_OP_MAX);
DUK_ASSERT_DISABLE(bc >= DUK_BC_BC_MIN); /* unsigned */
DUK_ASSERT(bc <= DUK_BC_BC_MAX);
DUK_ASSERT((bc & DUK__CONST_MARKER) == 0);
if (bc <= DUK_BC_BC_MAX) {
;
} else {
/* No BC shuffling now. */
goto error_outofregs;
}
#if defined(DUK_USE_SHUFFLE_TORTURE)
if (a <= DUK_BC_A_MAX && (op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_A)) {
#else
if (a <= DUK_BC_A_MAX) {
#endif
ins = DUK_ENC_OP_A_BC(op_flags & 0xff, a, bc);
duk__emit(comp_ctx, ins);
} else if (op_flags & DUK__EMIT_FLAG_NO_SHUFFLE_A) {
goto error_outofregs;
} else if (a <= DUK_BC_BC_MAX) {
comp_ctx->curr_func.needs_shuffle = 1;
tmp = comp_ctx->curr_func.shuffle1;
ins = DUK_ENC_OP_A_BC(op_flags & 0xff, tmp, bc);
if (op_flags & DUK__EMIT_FLAG_A_IS_SOURCE) {
duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_LDREG, tmp, a));
duk__emit(comp_ctx, ins);
} else {
duk__emit(comp_ctx, ins);
duk__emit(comp_ctx, DUK_ENC_OP_A_BC(DUK_OP_STREG, tmp, a));
}
} else {
goto error_outofregs;
}
return;
error_outofregs:
DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_REG_LIMIT);
}
DUK_LOCAL void duk__emit_abc(duk_compiler_ctx *comp_ctx, duk_small_uint_t op, duk_regconst_t abc) {
duk_instr_t ins;
DUK_ASSERT_DISABLE(op >= DUK_BC_OP_MIN); /* unsigned */
DUK_ASSERT(op <= DUK_BC_OP_MAX);
DUK_ASSERT_DISABLE(abc >= DUK_BC_ABC_MIN); /* unsigned */
DUK_ASSERT(abc <= DUK_BC_ABC_MAX);
DUK_ASSERT((abc & DUK__CONST_MARKER) == 0);
if (abc <= DUK_BC_ABC_MAX) {
;
} else {
goto error_outofregs;
}
ins = DUK_ENC_OP_ABC(op, abc);
DUK_DDD(DUK_DDDPRINT("duk__emit_abc: 0x%08lx line=%ld pc=%ld op=%ld (%!C) abc=%ld (%!I)",
(unsigned long) ins, (long) comp_ctx->curr_token.start_line,
(long) duk__get_current_pc(comp_ctx), (long) op, (long) op,
(long) abc, (duk_instr_t) ins));
duk__emit(comp_ctx, ins);
return;
error_outofregs:
DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_REG_LIMIT);
}
DUK_LOCAL void duk__emit_extraop_b_c(duk_compiler_ctx *comp_ctx, duk_small_uint_t extraop_flags, duk_regconst_t b, duk_regconst_t c) {
DUK_ASSERT_DISABLE((extraop_flags & 0xff) >= DUK_BC_EXTRAOP_MIN); /* unsigned */
DUK_ASSERT((extraop_flags & 0xff) <= DUK_BC_EXTRAOP_MAX);
/* Setting "no shuffle A" is covered by the assert, but it's needed
* with DUK_USE_SHUFFLE_TORTURE.
*/
duk__emit_a_b_c(comp_ctx,
DUK_OP_EXTRA | DUK__EMIT_FLAG_NO_SHUFFLE_A | (extraop_flags & ~0xff), /* transfer flags */
extraop_flags & 0xff,
b,
c);
}
DUK_LOCAL void duk__emit_extraop_b(duk_compiler_ctx *comp_ctx, duk_small_uint_t extraop_flags, duk_regconst_t b) {
DUK_ASSERT_DISABLE((extraop_flags & 0xff) >= DUK_BC_EXTRAOP_MIN); /* unsigned */
DUK_ASSERT((extraop_flags & 0xff) <= DUK_BC_EXTRAOP_MAX);
/* Setting "no shuffle A" is covered by the assert, but it's needed
* with DUK_USE_SHUFFLE_TORTURE.
*/
duk__emit_a_b_c(comp_ctx,
DUK_OP_EXTRA | DUK__EMIT_FLAG_NO_SHUFFLE_A | (extraop_flags & ~0xff), /* transfer flags */
extraop_flags & 0xff,
b,
0);
}
DUK_LOCAL void duk__emit_extraop_bc(duk_compiler_ctx *comp_ctx, duk_small_uint_t extraop, duk_regconst_t bc) {
DUK_ASSERT_DISABLE(extraop >= DUK_BC_EXTRAOP_MIN); /* unsigned */
DUK_ASSERT(extraop <= DUK_BC_EXTRAOP_MAX);
/* Setting "no shuffle A" is covered by the assert, but it's needed
* with DUK_USE_SHUFFLE_TORTURE.
*/
duk__emit_a_bc(comp_ctx,
DUK_OP_EXTRA | DUK__EMIT_FLAG_NO_SHUFFLE_A,
extraop,
bc);
}
DUK_LOCAL void duk__emit_extraop_only(duk_compiler_ctx *comp_ctx, duk_small_uint_t extraop_flags) {
DUK_ASSERT_DISABLE((extraop_flags & 0xff) >= DUK_BC_EXTRAOP_MIN); /* unsigned */
DUK_ASSERT((extraop_flags & 0xff) <= DUK_BC_EXTRAOP_MAX);
/* Setting "no shuffle A" is covered by the assert, but it's needed
* with DUK_USE_SHUFFLE_TORTURE.
*/
duk__emit_a_b_c(comp_ctx,
DUK_OP_EXTRA | DUK__EMIT_FLAG_NO_SHUFFLE_A | DUK__EMIT_FLAG_NO_SHUFFLE_B |
DUK__EMIT_FLAG_NO_SHUFFLE_C | (extraop_flags & ~0xff), /* transfer flags */
extraop_flags & 0xff,
0,
0);
}
DUK_LOCAL void duk__emit_load_int32_raw(duk_compiler_ctx *comp_ctx, duk_reg_t reg, duk_int32_t val, duk_small_uint_t op_flags) {
/* XXX: Shuffling support could be implemented here so that LDINT+LDINTX
* would only shuffle once (instead of twice). The current code works
* though, and has a smaller compiler footprint.
*/
if ((val >= (duk_int32_t) DUK_BC_BC_MIN - (duk_int32_t) DUK_BC_LDINT_BIAS) &&
(val <= (duk_int32_t) DUK_BC_BC_MAX - (duk_int32_t) DUK_BC_LDINT_BIAS)) {
DUK_DDD(DUK_DDDPRINT("emit LDINT to reg %ld for %ld", (long) reg, (long) val));
duk__emit_a_bc(comp_ctx, DUK_OP_LDINT | op_flags, reg, (duk_regconst_t) (val + (duk_int32_t) DUK_BC_LDINT_BIAS));
} else {
duk_int32_t hi = val >> DUK_BC_LDINTX_SHIFT;
duk_int32_t lo = val & ((((duk_int32_t) 1) << DUK_BC_LDINTX_SHIFT) - 1);
DUK_ASSERT(lo >= 0);
DUK_DDD(DUK_DDDPRINT("emit LDINT+LDINTX to reg %ld for %ld -> hi %ld, lo %ld",
(long) reg, (long) val, (long) hi, (long) lo));
duk__emit_a_bc(comp_ctx, DUK_OP_LDINT | op_flags, reg, (duk_regconst_t) (hi + (duk_int32_t) DUK_BC_LDINT_BIAS));
duk__emit_a_bc(comp_ctx, DUK_OP_LDINTX | op_flags, reg, (duk_regconst_t) lo);
}
}
DUK_LOCAL void duk__emit_load_int32(duk_compiler_ctx *comp_ctx, duk_reg_t reg, duk_int32_t val) {
duk__emit_load_int32_raw(comp_ctx, reg, val, 0 /*op_flags*/);
}
#if defined(DUK_USE_SHUFFLE_TORTURE)
/* Used by duk__emit*() calls so that we don't shuffle the loadints that
* are needed to handle indirect opcodes.
*/
DUK_LOCAL void duk__emit_load_int32_noshuffle(duk_compiler_ctx *comp_ctx, duk_reg_t reg, duk_int32_t val) {
duk__emit_load_int32_raw(comp_ctx, reg, val, DUK__EMIT_FLAG_NO_SHUFFLE_A /*op_flags*/);
}
#else
DUK_LOCAL void duk__emit_load_int32_noshuffle(duk_compiler_ctx *comp_ctx, duk_reg_t reg, duk_int32_t val) {
/* When torture not enabled, can just use the same helper because
* 'reg' won't get spilled.
*/
DUK_ASSERT(reg <= DUK_BC_A_MAX);
duk__emit_load_int32(comp_ctx, reg, val);
}
#endif
DUK_LOCAL void duk__emit_jump(duk_compiler_ctx *comp_ctx, duk_int_t target_pc) {
duk_int_t curr_pc;
duk_int_t offset;
curr_pc = (duk_int_t) (DUK_BW_GET_SIZE(comp_ctx->thr, &comp_ctx->curr_func.bw_code) / sizeof(duk_compiler_instr));
offset = (duk_int_t) target_pc - (duk_int_t) curr_pc - 1;
DUK_ASSERT(offset + DUK_BC_JUMP_BIAS >= DUK_BC_ABC_MIN);
DUK_ASSERT(offset + DUK_BC_JUMP_BIAS <= DUK_BC_ABC_MAX);
duk__emit_abc(comp_ctx, DUK_OP_JUMP, (duk_regconst_t) (offset + DUK_BC_JUMP_BIAS));
}
DUK_LOCAL duk_int_t duk__emit_jump_empty(duk_compiler_ctx *comp_ctx) {
duk_int_t ret;
ret = duk__get_current_pc(comp_ctx); /* useful for patching jumps later */
duk__emit_abc(comp_ctx, DUK_OP_JUMP, 0);
return ret;
}
/* Insert an empty jump in the middle of code emitted earlier. This is
* currently needed for compiling for-in.
*/
DUK_LOCAL void duk__insert_jump_entry(duk_compiler_ctx *comp_ctx, duk_int_t jump_pc) {
#if defined(DUK_USE_PC2LINE)
duk_int_t line;
#endif
duk_compiler_instr *instr;
duk_size_t offset;
offset = jump_pc * sizeof(duk_compiler_instr),
instr = (duk_compiler_instr *) (void *)
DUK_BW_INSERT_ENSURE_AREA(comp_ctx->thr,
&comp_ctx->curr_func.bw_code,
offset,
sizeof(duk_compiler_instr));
#if defined(DUK_USE_PC2LINE)
line = comp_ctx->curr_token.start_line; /* approximation, close enough */
#endif
instr->ins = DUK_ENC_OP_ABC(DUK_OP_JUMP, 0);
#if defined(DUK_USE_PC2LINE)
instr->line = line;
#endif
DUK_BW_ADD_PTR(comp_ctx->thr, &comp_ctx->curr_func.bw_code, sizeof(duk_compiler_instr));
if (DUK_UNLIKELY(DUK_BW_GET_SIZE(comp_ctx->thr, &comp_ctx->curr_func.bw_code) > DUK_USE_ESBC_MAX_BYTES)) {
goto fail_bc_limit;
}
return;
fail_bc_limit:
DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_BYTECODE_LIMIT);
}
/* Does not assume that jump_pc contains a DUK_OP_JUMP previously; this is intentional
* to allow e.g. an INVALID opcode be overwritten with a JUMP (label management uses this).
*/
DUK_LOCAL void duk__patch_jump(duk_compiler_ctx *comp_ctx, duk_int_t jump_pc, duk_int_t target_pc) {
duk_compiler_instr *instr;
duk_int_t offset;
/* allow negative PCs, behave as a no-op */
if (jump_pc < 0) {
DUK_DDD(DUK_DDDPRINT("duk__patch_jump(): nop call, jump_pc=%ld (<0), target_pc=%ld",
(long) jump_pc, (long) target_pc));
return;
}
DUK_ASSERT(jump_pc >= 0);
/* XXX: range assert */
instr = duk__get_instr_ptr(comp_ctx, jump_pc);
DUK_ASSERT(instr != NULL);
/* XXX: range assert */
offset = target_pc - jump_pc - 1;
instr->ins = DUK_ENC_OP_ABC(DUK_OP_JUMP, offset + DUK_BC_JUMP_BIAS);
DUK_DDD(DUK_DDDPRINT("duk__patch_jump(): jump_pc=%ld, target_pc=%ld, offset=%ld",
(long) jump_pc, (long) target_pc, (long) offset));
}
DUK_LOCAL void duk__patch_jump_here(duk_compiler_ctx *comp_ctx, duk_int_t jump_pc) {
duk__patch_jump(comp_ctx, jump_pc, duk__get_current_pc(comp_ctx));
}
DUK_LOCAL void duk__patch_trycatch(duk_compiler_ctx *comp_ctx, duk_int_t ldconst_pc, duk_int_t trycatch_pc, duk_regconst_t reg_catch, duk_regconst_t const_varname, duk_small_uint_t flags) {
duk_compiler_instr *instr;
DUK_ASSERT((reg_catch & DUK__CONST_MARKER) == 0);
instr = duk__get_instr_ptr(comp_ctx, ldconst_pc);
DUK_ASSERT(DUK_DEC_OP(instr->ins) == DUK_OP_LDCONST);
DUK_ASSERT(instr != NULL);
if (const_varname & DUK__CONST_MARKER) {
/* Have a catch variable. */
const_varname = const_varname & (~DUK__CONST_MARKER);
if (reg_catch > DUK_BC_BC_MAX || const_varname > DUK_BC_BC_MAX) {
/* Catch attempts to use out-of-range reg/const. Without this
* check Duktape 0.12.0 could generate invalid code which caused
* an assert failure on execution. This error is triggered e.g.
* for functions with a lot of constants and a try-catch statement.
* Shuffling or opcode semantics change is needed to fix the issue.
* See: test-bug-trycatch-many-constants.js.
*/
DUK_D(DUK_DPRINT("failed to patch trycatch: flags=%ld, reg_catch=%ld, const_varname=%ld (0x%08lx)",
(long) flags, (long) reg_catch, (long) const_varname, (long) const_varname));
DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_REG_LIMIT);
}
instr->ins |= DUK_ENC_OP_A_BC(0, 0, const_varname);
} else {
/* No catch variable, e.g. a try-finally; replace LDCONST with
* NOP to avoid a bogus LDCONST.
*/
instr->ins = DUK_ENC_OP_A(DUK_OP_EXTRA, DUK_EXTRAOP_NOP);
}
instr = duk__get_instr_ptr(comp_ctx, trycatch_pc);
DUK_ASSERT(instr != NULL);
DUK_ASSERT_DISABLE(flags >= DUK_BC_A_MIN);
DUK_ASSERT(flags <= DUK_BC_A_MAX);
instr->ins = DUK_ENC_OP_A_BC(DUK_OP_TRYCATCH, flags, reg_catch);
}
DUK_LOCAL void duk__emit_if_false_skip(duk_compiler_ctx *comp_ctx, duk_regconst_t regconst) {
duk__emit_a_b_c(comp_ctx,
DUK_OP_IF | DUK__EMIT_FLAG_NO_SHUFFLE_A | DUK__EMIT_FLAG_NO_SHUFFLE_C,
0 /*false*/,
regconst,
0 /*unused*/);
}
DUK_LOCAL void duk__emit_if_true_skip(duk_compiler_ctx *comp_ctx, duk_regconst_t regconst) {
duk__emit_a_b_c(comp_ctx,
DUK_OP_IF | DUK__EMIT_FLAG_NO_SHUFFLE_A | DUK__EMIT_FLAG_NO_SHUFFLE_C,
1 /*true*/,
regconst,
0 /*unused*/);
}
DUK_LOCAL void duk__emit_invalid(duk_compiler_ctx *comp_ctx) {
duk__emit_extraop_bc(comp_ctx, DUK_EXTRAOP_INVALID, 0);
}
/*
* Peephole optimizer for finished bytecode.
*
* Does not remove opcodes; currently only straightens out unconditional
* jump chains which are generated by several control structures.
*/
DUK_LOCAL void duk__peephole_optimize_bytecode(duk_compiler_ctx *comp_ctx) {
duk_compiler_instr *bc;
duk_small_uint_t iter;
duk_int_t i, n;
duk_int_t count_opt;
bc = (duk_compiler_instr *) (void *) DUK_BW_GET_BASEPTR(comp_ctx->thr, &comp_ctx->curr_func.bw_code);
#if defined(DUK_USE_BUFLEN16)
/* No need to assert, buffer size maximum is 0xffff. */
#else
DUK_ASSERT((duk_size_t) DUK_BW_GET_SIZE(comp_ctx->thr, &comp_ctx->curr_func.bw_code) / sizeof(duk_compiler_instr) <= (duk_size_t) DUK_INT_MAX); /* bytecode limits */
#endif
n = (duk_int_t) (DUK_BW_GET_SIZE(comp_ctx->thr, &comp_ctx->curr_func.bw_code) / sizeof(duk_compiler_instr));
for (iter = 0; iter < DUK_COMPILER_PEEPHOLE_MAXITER; iter++) {
count_opt = 0;
for (i = 0; i < n; i++) {
duk_instr_t ins;
duk_int_t target_pc1;
duk_int_t target_pc2;
ins = bc[i].ins;
if (DUK_DEC_OP(ins) != DUK_OP_JUMP) {
continue;
}
target_pc1 = i + 1 + DUK_DEC_ABC(ins) - DUK_BC_JUMP_BIAS;
DUK_DDD(DUK_DDDPRINT("consider jump at pc %ld; target_pc=%ld", (long) i, (long) target_pc1));
DUK_ASSERT(target_pc1 >= 0);
DUK_ASSERT(target_pc1 < n);
/* Note: if target_pc1 == i, we'll optimize a jump to itself.
* This does not need to be checked for explicitly; the case
* is rare and max iter breaks us out.
*/
ins = bc[target_pc1].ins;
if (DUK_DEC_OP(ins) != DUK_OP_JUMP) {
continue;
}
target_pc2 = target_pc1 + 1 + DUK_DEC_ABC(ins) - DUK_BC_JUMP_BIAS;
DUK_DDD(DUK_DDDPRINT("optimizing jump at pc %ld; old target is %ld -> new target is %ld",
(long) i, (long) target_pc1, (long) target_pc2));
bc[i].ins = DUK_ENC_OP_ABC(DUK_OP_JUMP, target_pc2 - (i + 1) + DUK_BC_JUMP_BIAS);
count_opt++;
}
DUK_DD(DUK_DDPRINT("optimized %ld jumps on peephole round %ld", (long) count_opt, (long) (iter + 1)));
if (count_opt == 0) {
break;
}
}
}
/*
* Intermediate value helpers
*/
#define DUK__ISREG(comp_ctx,x) (((x) & DUK__CONST_MARKER) == 0)
#define DUK__ISCONST(comp_ctx,x) (((x) & DUK__CONST_MARKER) != 0)
#define DUK__ISTEMP(comp_ctx,x) (DUK__ISREG((comp_ctx), (x)) && (duk_regconst_t) (x) >= (duk_regconst_t) ((comp_ctx)->curr_func.temp_first))
#define DUK__GETTEMP(comp_ctx) ((comp_ctx)->curr_func.temp_next)
#define DUK__SETTEMP(comp_ctx,x) ((comp_ctx)->curr_func.temp_next = (x)) /* dangerous: must only lower (temp_max not updated) */
#define DUK__SETTEMP_CHECKMAX(comp_ctx,x) duk__settemp_checkmax((comp_ctx),(x))
#define DUK__ALLOCTEMP(comp_ctx) duk__alloctemp((comp_ctx))
#define DUK__ALLOCTEMPS(comp_ctx,count) duk__alloctemps((comp_ctx),(count))
/* Flags for intermediate value coercions. A flag for using a forced reg
* is not needed, the forced_reg argument suffices and generates better
* code (it is checked as it is used).
*/
#define DUK__IVAL_FLAG_ALLOW_CONST (1 << 0) /* allow a constant to be returned */
#define DUK__IVAL_FLAG_REQUIRE_TEMP (1 << 1) /* require a (mutable) temporary as a result (or a const if allowed) */
#define DUK__IVAL_FLAG_REQUIRE_SHORT (1 << 2) /* require a short (8-bit) reg/const which fits into bytecode B/C slot */
/* XXX: some code might benefit from DUK__SETTEMP_IFTEMP(ctx,x) */
#if 0 /* enable manually for dumping */
#define DUK__DUMP_ISPEC(compctx,ispec) do { duk__dump_ispec((compctx), (ispec)); } while (0)
#define DUK__DUMP_IVALUE(compctx,ivalue) do { duk__dump_ivalue((compctx), (ivalue)); } while (0)
DUK_LOCAL void duk__dump_ispec(duk_compiler_ctx *comp_ctx, duk_ispec *x) {
DUK_D(DUK_DPRINT("ispec dump: t=%ld regconst=0x%08lx, valstack_idx=%ld, value=%!T",
(long) x->t, (unsigned long) x->regconst, (long) x->valstack_idx,
duk_get_tval((duk_context *) comp_ctx->thr, x->valstack_idx)));
}
DUK_LOCAL void duk__dump_ivalue(duk_compiler_ctx *comp_ctx, duk_ivalue *x) {
DUK_D(DUK_DPRINT("ivalue dump: t=%ld op=%ld "
"x1={t=%ld regconst=0x%08lx valstack_idx=%ld value=%!T} "
"x2={t=%ld regconst=0x%08lx valstack_idx=%ld value=%!T}",
(long) x->t, (long) x->op,
(long) x->x1.t, (unsigned long) x->x1.regconst, (long) x->x1.valstack_idx,
duk_get_tval((duk_context *) comp_ctx->thr, x->x1.valstack_idx),
(long) x->x2.t, (unsigned long) x->x2.regconst, (long) x->x2.valstack_idx,
duk_get_tval((duk_context *) comp_ctx->thr, x->x2.valstack_idx)));
}
#else
#define DUK__DUMP_ISPEC(comp_ctx,x) do {} while (0)
#define DUK__DUMP_IVALUE(comp_ctx,x) do {} while (0)
#endif
DUK_LOCAL void duk__copy_ispec(duk_compiler_ctx *comp_ctx, duk_ispec *src, duk_ispec *dst) {
duk_context *ctx = (duk_context *) comp_ctx->thr;
dst->t = src->t;
dst->regconst = src->regconst;
duk_copy(ctx, src->valstack_idx, dst->valstack_idx);
}
DUK_LOCAL void duk__copy_ivalue(duk_compiler_ctx *comp_ctx, duk_ivalue *src, duk_ivalue *dst) {
duk_context *ctx = (duk_context *) comp_ctx->thr;
dst->t = src->t;
dst->op = src->op;
dst->x1.t = src->x1.t;
dst->x1.regconst = src->x1.regconst;
dst->x2.t = src->x2.t;
dst->x2.regconst = src->x2.regconst;
duk_copy(ctx, src->x1.valstack_idx, dst->x1.valstack_idx);
duk_copy(ctx, src->x2.valstack_idx, dst->x2.valstack_idx);
}
/* XXX: to util */
DUK_LOCAL duk_bool_t duk__is_whole_get_int32(duk_double_t x, duk_int32_t *ival) {
duk_small_int_t c;
duk_int32_t t;
c = DUK_FPCLASSIFY(x);
if (c == DUK_FP_NORMAL || (c == DUK_FP_ZERO && !DUK_SIGNBIT(x))) {
/* Don't allow negative zero as it will cause trouble with
* LDINT+LDINTX. But positive zero is OK.
*/
t = (duk_int32_t) x;
if ((duk_double_t) t == x) {
*ival = t;
return 1;
}
}
return 0;
}
DUK_LOCAL duk_reg_t duk__alloctemps(duk_compiler_ctx *comp_ctx, duk_small_int_t num) {
duk_reg_t res;
res = comp_ctx->curr_func.temp_next;
comp_ctx->curr_func.temp_next += num;
if (comp_ctx->curr_func.temp_next > DUK__MAX_TEMPS) { /* == DUK__MAX_TEMPS is OK */
DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_TEMP_LIMIT);
}
/* maintain highest 'used' temporary, needed to figure out nregs of function */
if (comp_ctx->curr_func.temp_next > comp_ctx->curr_func.temp_max) {
comp_ctx->curr_func.temp_max = comp_ctx->curr_func.temp_next;
}
return res;
}
DUK_LOCAL duk_reg_t duk__alloctemp(duk_compiler_ctx *comp_ctx) {
return duk__alloctemps(comp_ctx, 1);
}
DUK_LOCAL void duk__settemp_checkmax(duk_compiler_ctx *comp_ctx, duk_reg_t temp_next) {
comp_ctx->curr_func.temp_next = temp_next;
if (temp_next > comp_ctx->curr_func.temp_max) {
comp_ctx->curr_func.temp_max = temp_next;
}
}
/* get const for value at valstack top */
DUK_LOCAL duk_regconst_t duk__getconst(duk_compiler_ctx *comp_ctx) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_compiler_func *f = &comp_ctx->curr_func;
duk_tval *tv1;
duk_int_t i, n, n_check;
n = (duk_int_t) duk_get_length(ctx, f->consts_idx);
tv1 = DUK_GET_TVAL_NEGIDX(ctx, -1);
DUK_ASSERT(tv1 != NULL);
#if defined(DUK_USE_FASTINT)
/* Explicit check for fastint downgrade. */
DUK_TVAL_CHKFAST_INPLACE(tv1);
#endif
/* Sanity workaround for handling functions with a large number of
* constants at least somewhat reasonably. Otherwise checking whether
* we already have the constant would grow very slow (as it is O(N^2)).
*/
n_check = (n > DUK__GETCONST_MAX_CONSTS_CHECK ? DUK__GETCONST_MAX_CONSTS_CHECK : n);
for (i = 0; i < n_check; i++) {
duk_tval *tv2 = DUK_HOBJECT_A_GET_VALUE_PTR(thr->heap, f->h_consts, i);
/* Strict equality is NOT enough, because we cannot use the same
* constant for e.g. +0 and -0.
*/
if (duk_js_samevalue(tv1, tv2)) {
DUK_DDD(DUK_DDDPRINT("reused existing constant for %!T -> const index %ld",
(duk_tval *) tv1, (long) i));
duk_pop(ctx);
return (duk_regconst_t) (i | DUK__CONST_MARKER);
}
}
if (n > DUK__MAX_CONSTS) {
DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_CONST_LIMIT);
}
DUK_DDD(DUK_DDDPRINT("allocating new constant for %!T -> const index %ld",
(duk_tval *) tv1, (long) n));
(void) duk_put_prop_index(ctx, f->consts_idx, n); /* invalidates tv1, tv2 */
return (duk_regconst_t) (n | DUK__CONST_MARKER);
}
/* Get the value represented by an duk_ispec to a register or constant.
* The caller can control the result by indicating whether or not:
*
* (1) a constant is allowed (sometimes the caller needs the result to
* be in a register)
*
* (2) a temporary register is required (usually when caller requires
* the register to be safely mutable; normally either a bound
* register or a temporary register are both OK)
*
* (3) a forced register target needs to be used
*
* Bytecode may be emitted to generate the necessary value. The return
* value is either a register or a constant.
*/
DUK_LOCAL
duk_regconst_t duk__ispec_toregconst_raw(duk_compiler_ctx *comp_ctx,
duk_ispec *x,
duk_reg_t forced_reg,
duk_small_uint_t flags) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
DUK_DDD(DUK_DDDPRINT("duk__ispec_toregconst_raw(): x={%ld:%ld:%!T}, "
"forced_reg=%ld, flags 0x%08lx: allow_const=%ld require_temp=%ld require_short=%ld",
(long) x->t,
(long) x->regconst,
(duk_tval *) duk_get_tval(ctx, x->valstack_idx),
(long) forced_reg,
(unsigned long) flags,
(long) ((flags & DUK__IVAL_FLAG_ALLOW_CONST) ? 1 : 0),
(long) ((flags & DUK__IVAL_FLAG_REQUIRE_TEMP) ? 1 : 0),
(long) ((flags & DUK__IVAL_FLAG_REQUIRE_SHORT) ? 1 : 0)));
switch (x->t) {
case DUK_ISPEC_VALUE: {
duk_tval *tv;
tv = DUK_GET_TVAL_POSIDX(ctx, x->valstack_idx);
DUK_ASSERT(tv != NULL);
switch (DUK_TVAL_GET_TAG(tv)) {
case DUK_TAG_UNDEFINED: {
/* Note: although there is no 'undefined' literal, undefined
* values can occur during compilation as a result of e.g.
* the 'void' operator.
*/
duk_reg_t dest = (forced_reg >= 0 ? forced_reg : DUK__ALLOCTEMP(comp_ctx));
duk__emit_extraop_bc(comp_ctx, DUK_EXTRAOP_LDUNDEF, (duk_regconst_t) dest);
return (duk_regconst_t) dest;
}
case DUK_TAG_NULL: {
duk_reg_t dest = (forced_reg >= 0 ? forced_reg : DUK__ALLOCTEMP(comp_ctx));
duk__emit_extraop_bc(comp_ctx, DUK_EXTRAOP_LDNULL, (duk_regconst_t) dest);
return (duk_regconst_t) dest;
}
case DUK_TAG_BOOLEAN: {
duk_reg_t dest = (forced_reg >= 0 ? forced_reg : DUK__ALLOCTEMP(comp_ctx));
duk__emit_extraop_bc(comp_ctx,
(DUK_TVAL_GET_BOOLEAN(tv) ? DUK_EXTRAOP_LDTRUE : DUK_EXTRAOP_LDFALSE),
(duk_regconst_t) dest);
return (duk_regconst_t) dest;
}
case DUK_TAG_POINTER: {
DUK_UNREACHABLE();
break;
}
case DUK_TAG_STRING: {
duk_hstring *h;
duk_reg_t dest;
duk_regconst_t constidx;
h = DUK_TVAL_GET_STRING(tv);
DUK_UNREF(h);
DUK_ASSERT(h != NULL);
#if 0 /* XXX: to be implemented? */
/* Use special opcodes to load short strings */
if (DUK_HSTRING_GET_BYTELEN(h) <= 2) {
/* Encode into a single opcode (18 bits can encode 1-2 bytes + length indicator) */
} else if (DUK_HSTRING_GET_BYTELEN(h) <= 6) {
/* Encode into a double constant (53 bits can encode 6*8 = 48 bits + 3-bit length */
}
#endif
duk_dup(ctx, x->valstack_idx);
constidx = duk__getconst(comp_ctx);
if (flags & DUK__IVAL_FLAG_ALLOW_CONST) {
return constidx;
}
dest = (forced_reg >= 0 ? forced_reg : DUK__ALLOCTEMP(comp_ctx));
duk__emit_a_bc(comp_ctx, DUK_OP_LDCONST, (duk_regconst_t) dest, constidx);
return (duk_regconst_t) dest;
}
case DUK_TAG_OBJECT: {
DUK_UNREACHABLE();
break;
}
case DUK_TAG_BUFFER: {
DUK_UNREACHABLE();
break;
}
case DUK_TAG_LIGHTFUNC: {
DUK_UNREACHABLE();
break;
}
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT:
#endif
default: {
/* number */
duk_reg_t dest;
duk_regconst_t constidx;
duk_double_t dval;
duk_int32_t ival;
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
dval = DUK_TVAL_GET_NUMBER(tv);
if (!(flags & DUK__IVAL_FLAG_ALLOW_CONST)) {
/* A number can be loaded either through a constant, using
* LDINT, or using LDINT+LDINTX. LDINT is always a size win,
* LDINT+LDINTX is not if the constant is used multiple times.
* Currently always prefer LDINT+LDINTX over a double constant.
*/
if (duk__is_whole_get_int32(dval, &ival)) {
dest = (forced_reg >= 0 ? forced_reg : DUK__ALLOCTEMP(comp_ctx));
duk__emit_load_int32(comp_ctx, dest, ival);
return (duk_regconst_t) dest;
}
}
duk_dup(ctx, x->valstack_idx);
constidx = duk__getconst(comp_ctx);
if (flags & DUK__IVAL_FLAG_ALLOW_CONST) {
return constidx;
} else {
dest = (forced_reg >= 0 ? forced_reg : DUK__ALLOCTEMP(comp_ctx));
duk__emit_a_bc(comp_ctx, DUK_OP_LDCONST, (duk_regconst_t) dest, constidx);
return (duk_regconst_t) dest;
}
}
} /* end switch */
}
case DUK_ISPEC_REGCONST: {
if (forced_reg >= 0) {
if (x->regconst & DUK__CONST_MARKER) {
duk__emit_a_bc(comp_ctx, DUK_OP_LDCONST, forced_reg, x->regconst);
} else if (x->regconst != (duk_regconst_t) forced_reg) {
duk__emit_a_bc(comp_ctx, DUK_OP_LDREG, forced_reg, x->regconst);
} else {
; /* already in correct reg */
}
return (duk_regconst_t) forced_reg;
}
DUK_ASSERT(forced_reg < 0);
if (x->regconst & DUK__CONST_MARKER) {
if (!(flags & DUK__IVAL_FLAG_ALLOW_CONST)) {
duk_reg_t dest = DUK__ALLOCTEMP(comp_ctx);
duk__emit_a_bc(comp_ctx, DUK_OP_LDCONST, (duk_regconst_t) dest, x->regconst);
return (duk_regconst_t) dest;
}
return x->regconst;
}
DUK_ASSERT(forced_reg < 0 && !(x->regconst & DUK__CONST_MARKER));
if ((flags & DUK__IVAL_FLAG_REQUIRE_TEMP) && !DUK__ISTEMP(comp_ctx, x->regconst)) {
duk_reg_t dest = DUK__ALLOCTEMP(comp_ctx);
duk__emit_a_bc(comp_ctx, DUK_OP_LDREG, (duk_regconst_t) dest, x->regconst);
return (duk_regconst_t) dest;
}
return x->regconst;
}
default: {
break;
}
}
DUK_ERROR_INTERNAL_DEFMSG(thr);
return 0;
}
DUK_LOCAL void duk__ispec_toforcedreg(duk_compiler_ctx *comp_ctx, duk_ispec *x, duk_reg_t forced_reg) {
DUK_ASSERT(forced_reg >= 0);
(void) duk__ispec_toregconst_raw(comp_ctx, x, forced_reg, 0 /*flags*/);
}
/* Coerce an duk_ivalue to a 'plain' value by generating the necessary
* arithmetic operations, property access, or variable access bytecode.
* The duk_ivalue argument ('x') is converted into a plain value as a
* side effect.
*/
DUK_LOCAL void duk__ivalue_toplain_raw(duk_compiler_ctx *comp_ctx, duk_ivalue *x, duk_reg_t forced_reg) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
DUK_DDD(DUK_DDDPRINT("duk__ivalue_toplain_raw(): x={t=%ld,op=%ld,x1={%ld:%ld:%!T},x2={%ld:%ld:%!T}}, "
"forced_reg=%ld",
(long) x->t, (long) x->op,
(long) x->x1.t, (long) x->x1.regconst,
(duk_tval *) duk_get_tval(ctx, x->x1.valstack_idx),
(long) x->x2.t, (long) x->x2.regconst,
(duk_tval *) duk_get_tval(ctx, x->x2.valstack_idx),
(long) forced_reg));
switch (x->t) {
case DUK_IVAL_PLAIN: {
return;
}
/* XXX: support unary arithmetic ivalues (useful?) */
case DUK_IVAL_ARITH:
case DUK_IVAL_ARITH_EXTRAOP: {
duk_regconst_t arg1;
duk_regconst_t arg2;
duk_reg_t dest;
duk_tval *tv1;
duk_tval *tv2;
DUK_DDD(DUK_DDDPRINT("arith to plain conversion"));
/* inline arithmetic check for constant values */
/* XXX: use the exactly same arithmetic function here as in executor */
if (x->x1.t == DUK_ISPEC_VALUE && x->x2.t == DUK_ISPEC_VALUE && x->t == DUK_IVAL_ARITH) {
tv1 = DUK_GET_TVAL_POSIDX(ctx, x->x1.valstack_idx);
tv2 = DUK_GET_TVAL_POSIDX(ctx, x->x2.valstack_idx);
DUK_ASSERT(tv1 != NULL);
DUK_ASSERT(tv2 != NULL);
DUK_DDD(DUK_DDDPRINT("arith: tv1=%!T, tv2=%!T",
(duk_tval *) tv1,
(duk_tval *) tv2));
if (DUK_TVAL_IS_NUMBER(tv1) && DUK_TVAL_IS_NUMBER(tv2)) {
duk_double_t d1 = DUK_TVAL_GET_NUMBER(tv1);
duk_double_t d2 = DUK_TVAL_GET_NUMBER(tv2);
duk_double_t d3;
duk_bool_t accept = 1;
DUK_DDD(DUK_DDDPRINT("arith inline check: d1=%lf, d2=%lf, op=%ld",
(double) d1, (double) d2, (long) x->op));
switch (x->op) {
case DUK_OP_ADD: d3 = d1 + d2; break;
case DUK_OP_SUB: d3 = d1 - d2; break;
case DUK_OP_MUL: d3 = d1 * d2; break;
case DUK_OP_DIV: d3 = d1 / d2; break;
default: accept = 0; break;
}
if (accept) {
duk_double_union du;
du.d = d3;
DUK_DBLUNION_NORMALIZE_NAN_CHECK(&du);
d3 = du.d;
x->t = DUK_IVAL_PLAIN;
DUK_ASSERT(x->x1.t == DUK_ISPEC_VALUE);
DUK_TVAL_SET_NUMBER(tv1, d3); /* old value is number: no refcount */
return;
}
} else if (x->op == DUK_OP_ADD && DUK_TVAL_IS_STRING(tv1) && DUK_TVAL_IS_STRING(tv2)) {
/* inline string concatenation */
duk_dup(ctx, x->x1.valstack_idx);
duk_dup(ctx, x->x2.valstack_idx);
duk_concat(ctx, 2);
duk_replace(ctx, x->x1.valstack_idx);
x->t = DUK_IVAL_PLAIN;
DUK_ASSERT(x->x1.t == DUK_ISPEC_VALUE);
return;
}
}
arg1 = duk__ispec_toregconst_raw(comp_ctx, &x->x1, -1, DUK__IVAL_FLAG_ALLOW_CONST | DUK__IVAL_FLAG_REQUIRE_SHORT /*flags*/);
arg2 = duk__ispec_toregconst_raw(comp_ctx, &x->x2, -1, DUK__IVAL_FLAG_ALLOW_CONST | DUK__IVAL_FLAG_REQUIRE_SHORT /*flags*/);
/* If forced reg, use it as destination. Otherwise try to
* use either coerced ispec if it is a temporary.
*
* When using extraops, avoid reusing arg2 as dest because that
* would lead to an LDREG shuffle below. We still can't guarantee
* dest != arg2 because we may have a forced_reg.
*/
if (forced_reg >= 0) {
dest = forced_reg;
} else if (DUK__ISTEMP(comp_ctx, arg1)) {
dest = (duk_reg_t) arg1;
} else if (DUK__ISTEMP(comp_ctx, arg2) && x->t != DUK_IVAL_ARITH_EXTRAOP) {
dest = (duk_reg_t) arg2;
} else {
dest = DUK__ALLOCTEMP(comp_ctx);
}
/* Extraop arithmetic opcodes must have destination same as
* first source. If second source matches destination we need
* a temporary register to avoid clobbering the second source.
*
* XXX: change calling code to avoid this situation in most cases.
*/
if (x->t == DUK_IVAL_ARITH_EXTRAOP) {
if (!(DUK__ISREG(comp_ctx, arg1) && (duk_reg_t) arg1 == dest)) {
if (DUK__ISREG(comp_ctx, arg2) && (duk_reg_t) arg2 == dest) {
/* arg2 would be clobbered so reassign it to a temp. */
duk_reg_t tempreg;
tempreg = DUK__ALLOCTEMP(comp_ctx);
duk__emit_a_bc(comp_ctx, DUK_OP_LDREG, tempreg, arg2);
arg2 = tempreg;
}
if (DUK__ISREG(comp_ctx, arg1)) {
duk__emit_a_bc(comp_ctx, DUK_OP_LDREG, dest, arg1);
} else {
DUK_ASSERT(DUK__ISCONST(comp_ctx, arg1));
duk__emit_a_bc(comp_ctx, DUK_OP_LDCONST, dest, arg1);
}
}
/* Note: special DUK__EMIT_FLAG_B_IS_TARGETSOURCE
* used to indicate that B is both a source and a
* target register. When shuffled, it needs to be
* both input and output shuffled.
*/
DUK_ASSERT(DUK__ISREG(comp_ctx, dest));
duk__emit_extraop_b_c(comp_ctx,
x->op | DUK__EMIT_FLAG_B_IS_TARGET |
DUK__EMIT_FLAG_B_IS_TARGETSOURCE,
(duk_regconst_t) dest,
(duk_regconst_t) arg2);
} else {
DUK_ASSERT(DUK__ISREG(comp_ctx, dest));
duk__emit_a_b_c(comp_ctx, x->op, (duk_regconst_t) dest, arg1, arg2);
}
x->t = DUK_IVAL_PLAIN;
x->x1.t = DUK_ISPEC_REGCONST;
x->x1.regconst = (duk_regconst_t) dest;
return;
}
case DUK_IVAL_PROP: {
/* XXX: very similar to DUK_IVAL_ARITH - merge? */
duk_regconst_t arg1;
duk_regconst_t arg2;
duk_reg_t dest;
/* Need a short reg/const, does not have to be a mutable temp. */
arg1 = duk__ispec_toregconst_raw(comp_ctx, &x->x1, -1, DUK__IVAL_FLAG_ALLOW_CONST | DUK__IVAL_FLAG_REQUIRE_SHORT /*flags*/);
arg2 = duk__ispec_toregconst_raw(comp_ctx, &x->x2, -1, DUK__IVAL_FLAG_ALLOW_CONST | DUK__IVAL_FLAG_REQUIRE_SHORT /*flags*/);
/* Pick a destination register. If either base value or key
* happens to be a temp value, reuse it as the destination.
*
* XXX: The temp must be a "mutable" one, i.e. such that no
* other expression is using it anymore. Here this should be
* the case because the value of a property access expression
* is neither the base nor the key, but the lookup result.
*/
if (forced_reg >= 0) {
dest = forced_reg;
} else if (DUK__ISTEMP(comp_ctx, arg1)) {
dest = (duk_reg_t) arg1;
} else if (DUK__ISTEMP(comp_ctx, arg2)) {
dest = (duk_reg_t) arg2;
} else {
dest = DUK__ALLOCTEMP(comp_ctx);
}
duk__emit_a_b_c(comp_ctx, DUK_OP_GETPROP, (duk_regconst_t) dest, arg1, arg2);
x->t = DUK_IVAL_PLAIN;
x->x1.t = DUK_ISPEC_REGCONST;
x->x1.regconst = (duk_regconst_t) dest;
return;
}
case DUK_IVAL_VAR: {
/* x1 must be a string */
duk_reg_t dest;
duk_reg_t reg_varbind;
duk_regconst_t rc_varname;
DUK_ASSERT(x->x1.t == DUK_ISPEC_VALUE);
duk_dup(ctx, x->x1.valstack_idx);
if (duk__lookup_lhs(comp_ctx, &reg_varbind, &rc_varname)) {
x->t = DUK_IVAL_PLAIN;
x->x1.t = DUK_ISPEC_REGCONST;
x->x1.regconst = (duk_regconst_t) reg_varbind;
} else {
dest = (forced_reg >= 0 ? forced_reg : DUK__ALLOCTEMP(comp_ctx));
duk__emit_a_bc(comp_ctx, DUK_OP_GETVAR, (duk_regconst_t) dest, rc_varname);
x->t = DUK_IVAL_PLAIN;
x->x1.t = DUK_ISPEC_REGCONST;
x->x1.regconst = (duk_regconst_t) dest;
}
return;
}
case DUK_IVAL_NONE:
default: {
break;
}
}
DUK_ERROR_INTERNAL_DEFMSG(thr);
return;
}
/* evaluate to plain value, no forced register (temp/bound reg both ok) */
DUK_LOCAL void duk__ivalue_toplain(duk_compiler_ctx *comp_ctx, duk_ivalue *x) {
duk__ivalue_toplain_raw(comp_ctx, x, -1 /*forced_reg*/);
}
/* evaluate to final form (e.g. coerce GETPROP to code), throw away temp */
DUK_LOCAL void duk__ivalue_toplain_ignore(duk_compiler_ctx *comp_ctx, duk_ivalue *x) {
duk_reg_t temp;
/* If duk__ivalue_toplain_raw() allocates a temp, forget it and
* restore next temp state.
*/
temp = DUK__GETTEMP(comp_ctx);
duk__ivalue_toplain_raw(comp_ctx, x, -1 /*forced_reg*/);
DUK__SETTEMP(comp_ctx, temp);
}
/* Coerce an duk_ivalue to a register or constant; result register may
* be a temp or a bound register.
*
* The duk_ivalue argument ('x') is converted into a regconst as a
* side effect.
*/
DUK_LOCAL
duk_regconst_t duk__ivalue_toregconst_raw(duk_compiler_ctx *comp_ctx,
duk_ivalue *x,
duk_reg_t forced_reg,
duk_small_uint_t flags) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_regconst_t reg;
DUK_UNREF(thr);
DUK_UNREF(ctx);
DUK_DDD(DUK_DDDPRINT("duk__ivalue_toregconst_raw(): x={t=%ld,op=%ld,x1={%ld:%ld:%!T},x2={%ld:%ld:%!T}}, "
"forced_reg=%ld, flags 0x%08lx: allow_const=%ld require_temp=%ld require_short=%ld",
(long) x->t, (long) x->op,
(long) x->x1.t, (long) x->x1.regconst,
(duk_tval *) duk_get_tval(ctx, x->x1.valstack_idx),
(long) x->x2.t, (long) x->x2.regconst,
(duk_tval *) duk_get_tval(ctx, x->x2.valstack_idx),
(long) forced_reg,
(unsigned long) flags,
(long) ((flags & DUK__IVAL_FLAG_ALLOW_CONST) ? 1 : 0),
(long) ((flags & DUK__IVAL_FLAG_REQUIRE_TEMP) ? 1 : 0),
(long) ((flags & DUK__IVAL_FLAG_REQUIRE_SHORT) ? 1 : 0)));
/* first coerce to a plain value */
duk__ivalue_toplain_raw(comp_ctx, x, forced_reg);
DUK_ASSERT(x->t == DUK_IVAL_PLAIN);
/* then to a register */
reg = duk__ispec_toregconst_raw(comp_ctx, &x->x1, forced_reg, flags);
x->x1.t = DUK_ISPEC_REGCONST;
x->x1.regconst = reg;
return reg;
}
DUK_LOCAL duk_reg_t duk__ivalue_toreg(duk_compiler_ctx *comp_ctx, duk_ivalue *x) {
return duk__ivalue_toregconst_raw(comp_ctx, x, -1, 0 /*flags*/);
}
#if 0 /* unused */
DUK_LOCAL duk_reg_t duk__ivalue_totemp(duk_compiler_ctx *comp_ctx, duk_ivalue *x) {
return duk__ivalue_toregconst_raw(comp_ctx, x, -1, DUK__IVAL_FLAG_REQUIRE_TEMP /*flags*/);
}
#endif
DUK_LOCAL void duk__ivalue_toforcedreg(duk_compiler_ctx *comp_ctx, duk_ivalue *x, duk_int_t forced_reg) {
DUK_ASSERT(forced_reg >= 0);
(void) duk__ivalue_toregconst_raw(comp_ctx, x, forced_reg, 0 /*flags*/);
}
DUK_LOCAL duk_regconst_t duk__ivalue_toregconst(duk_compiler_ctx *comp_ctx, duk_ivalue *x) {
return duk__ivalue_toregconst_raw(comp_ctx, x, -1, DUK__IVAL_FLAG_ALLOW_CONST /*flags*/);
}
DUK_LOCAL duk_regconst_t duk__ivalue_totempconst(duk_compiler_ctx *comp_ctx, duk_ivalue *x) {
return duk__ivalue_toregconst_raw(comp_ctx, x, -1, DUK__IVAL_FLAG_ALLOW_CONST | DUK__IVAL_FLAG_REQUIRE_TEMP /*flags*/);
}
/* The issues below can be solved with better flags */
/* XXX: many operations actually want toforcedtemp() -- brand new temp? */
/* XXX: need a toplain_ignore() which will only coerce a value to a temp
* register if it might have a side effect. Side-effect free values do not
* need to be coerced.
*/
/*
* Identifier handling
*/
DUK_LOCAL duk_reg_t duk__lookup_active_register_binding(duk_compiler_ctx *comp_ctx) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_hstring *h_varname;
duk_reg_t ret;
DUK_DDD(DUK_DDDPRINT("resolving identifier reference to '%!T'",
(duk_tval *) duk_get_tval(ctx, -1)));
/*
* Special name handling
*/
h_varname = duk_get_hstring(ctx, -1);
DUK_ASSERT(h_varname != NULL);
if (h_varname == DUK_HTHREAD_STRING_LC_ARGUMENTS(thr)) {
DUK_DDD(DUK_DDDPRINT("flagging function as accessing 'arguments'"));
comp_ctx->curr_func.id_access_arguments = 1;
}
/*
* Inside one or more 'with' statements fall back to slow path always.
* (See e.g. test-stmt-with.js.)
*/
if (comp_ctx->curr_func.with_depth > 0) {
DUK_DDD(DUK_DDDPRINT("identifier lookup inside a 'with' -> fall back to slow path"));
goto slow_path;
}
/*
* Any catch bindings ("catch (e)") also affect identifier binding.
*
* Currently, the varmap is modified for the duration of the catch
* clause to ensure any identifier accesses with the catch variable
* name will use slow path.
*/
duk_get_prop(ctx, comp_ctx->curr_func.varmap_idx);
if (duk_is_number(ctx, -1)) {
ret = duk_to_int(ctx, -1);
duk_pop(ctx);
} else {
duk_pop(ctx);
goto slow_path;
}
DUK_DDD(DUK_DDDPRINT("identifier lookup -> reg %ld", (long) ret));
return ret;
slow_path:
DUK_DDD(DUK_DDDPRINT("identifier lookup -> slow path"));
comp_ctx->curr_func.id_access_slow = 1;
return (duk_reg_t) -1;
}
/* Lookup an identifier name in the current varmap, indicating whether the
* identifier is register-bound and if not, allocating a constant for the
* identifier name. Returns 1 if register-bound, 0 otherwise. Caller can
* also check (out_reg_varbind >= 0) to check whether or not identifier is
* register bound. The caller must NOT use out_rc_varname at all unless
* return code is 0 or out_reg_varbind is < 0; this is becuase out_rc_varname
* is unsigned and doesn't have a "unused" / none value.
*/
DUK_LOCAL duk_bool_t duk__lookup_lhs(duk_compiler_ctx *comp_ctx, duk_reg_t *out_reg_varbind, duk_regconst_t *out_rc_varname) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_reg_t reg_varbind;
duk_regconst_t rc_varname;
/* [ ... varname ] */
duk_dup_top(ctx);
reg_varbind = duk__lookup_active_register_binding(comp_ctx);
if (reg_varbind >= 0) {
*out_reg_varbind = reg_varbind;
*out_rc_varname = 0; /* duk_regconst_t is unsigned, so use 0 as dummy value (ignored by caller) */
duk_pop(ctx);
return 1;
} else {
rc_varname = duk__getconst(comp_ctx);
*out_reg_varbind = -1;
*out_rc_varname = rc_varname;
return 0;
}
}
/*
* Label handling
*
* Labels are initially added with flags prohibiting both break and continue.
* When the statement type is finally uncovered (after potentially multiple
* labels), all the labels are updated to allow/prohibit break and continue.
*/
DUK_LOCAL void duk__add_label(duk_compiler_ctx *comp_ctx, duk_hstring *h_label, duk_int_t pc_label, duk_int_t label_id) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_size_t n;
duk_size_t new_size;
duk_uint8_t *p;
duk_labelinfo *li_start, *li;
/* Duplicate (shadowing) labels are not allowed, except for the empty
* labels (which are used as default labels for switch and iteration
* statements).
*
* We could also allow shadowing of non-empty pending labels without any
* other issues than breaking the required label shadowing requirements
* of the E5 specification, see Section 12.12.
*/
p = (duk_uint8_t *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, comp_ctx->curr_func.h_labelinfos);
li_start = (duk_labelinfo *) (void *) p;
li = (duk_labelinfo *) (void *) (p + DUK_HBUFFER_GET_SIZE(comp_ctx->curr_func.h_labelinfos));
n = (duk_size_t) (li - li_start);
while (li > li_start) {
li--;
if (li->h_label == h_label && h_label != DUK_HTHREAD_STRING_EMPTY_STRING(thr)) {
DUK_ERROR_SYNTAX(thr, DUK_STR_DUPLICATE_LABEL);
}
}
duk_push_hstring(ctx, h_label);
DUK_ASSERT(n <= DUK_UARRIDX_MAX); /* label limits */
(void) duk_put_prop_index(ctx, comp_ctx->curr_func.labelnames_idx, (duk_uarridx_t) n);
new_size = (n + 1) * sizeof(duk_labelinfo);
duk_hbuffer_resize(thr, comp_ctx->curr_func.h_labelinfos, new_size);
/* XXX: spare handling, slow now */
/* relookup after possible realloc */
p = (duk_uint8_t *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, comp_ctx->curr_func.h_labelinfos);
li_start = (duk_labelinfo *) (void *) p;
DUK_UNREF(li_start); /* silence scan-build warning */
li = (duk_labelinfo *) (void *) (p + DUK_HBUFFER_GET_SIZE(comp_ctx->curr_func.h_labelinfos));
li--;
/* Labels can be used for iteration statements but also for other statements,
* in particular a label can be used for a block statement. All cases of a
* named label accept a 'break' so that flag is set here. Iteration statements
* also allow 'continue', so that flag is updated when we figure out the
* statement type.
*/
li->flags = DUK_LABEL_FLAG_ALLOW_BREAK;
li->label_id = label_id;
li->h_label = h_label;
li->catch_depth = comp_ctx->curr_func.catch_depth; /* catch depth from current func */
li->pc_label = pc_label;
DUK_DDD(DUK_DDDPRINT("registered label: flags=0x%08lx, id=%ld, name=%!O, catch_depth=%ld, pc_label=%ld",
(unsigned long) li->flags, (long) li->label_id, (duk_heaphdr *) li->h_label,
(long) li->catch_depth, (long) li->pc_label));
}
/* Update all labels with matching label_id. */
DUK_LOCAL void duk__update_label_flags(duk_compiler_ctx *comp_ctx, duk_int_t label_id, duk_small_uint_t flags) {
duk_uint8_t *p;
duk_labelinfo *li_start, *li;
p = (duk_uint8_t *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(comp_ctx->thr->heap, comp_ctx->curr_func.h_labelinfos);
li_start = (duk_labelinfo *) (void *) p;
li = (duk_labelinfo *) (void *) (p + DUK_HBUFFER_GET_SIZE(comp_ctx->curr_func.h_labelinfos));
/* Match labels starting from latest; once label_id no longer matches, we can
* safely exit without checking the rest of the labels (only the topmost labels
* are ever updated).
*/
while (li > li_start) {
li--;
if (li->label_id != label_id) {
break;
}
DUK_DDD(DUK_DDDPRINT("updating (overwriting) label flags for li=%p, label_id=%ld, flags=%ld",
(void *) li, (long) label_id, (long) flags));
li->flags = flags;
}
}
/* Lookup active label information. Break/continue distinction is necessary to handle switch
* statement related labels correctly: a switch will only catch a 'break', not a 'continue'.
*
* An explicit label cannot appear multiple times in the active set, but empty labels (unlabelled
* iteration and switch statements) can. A break will match the closest unlabelled or labelled
* statement. A continue will match the closest unlabelled or labelled iteration statement. It is
* a syntax error if a continue matches a labelled switch statement; because an explicit label cannot
* be duplicated, the continue cannot match any valid label outside the switch.
*
* A side effect of these rules is that a LABEL statement related to a switch should never actually
* catch a continue abrupt completion at run-time. Hence an INVALID opcode can be placed in the
* continue slot of the switch's LABEL statement.
*/
/* XXX: awkward, especially the bunch of separate output values -> output struct? */
DUK_LOCAL void duk__lookup_active_label(duk_compiler_ctx *comp_ctx, duk_hstring *h_label, duk_bool_t is_break, duk_int_t *out_label_id, duk_int_t *out_label_catch_depth, duk_int_t *out_label_pc, duk_bool_t *out_is_closest) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_uint8_t *p;
duk_labelinfo *li_start, *li_end, *li;
duk_bool_t match = 0;
DUK_DDD(DUK_DDDPRINT("looking up active label: label='%!O', is_break=%ld",
(duk_heaphdr *) h_label, (long) is_break));
DUK_UNREF(ctx);
p = (duk_uint8_t *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, comp_ctx->curr_func.h_labelinfos);
li_start = (duk_labelinfo *) (void *) p;
li_end = (duk_labelinfo *) (void *) (p + DUK_HBUFFER_GET_SIZE(comp_ctx->curr_func.h_labelinfos));
li = li_end;
/* Match labels starting from latest label because there can be duplicate empty
* labels in the label set.
*/
while (li > li_start) {
li--;
if (li->h_label != h_label) {
DUK_DDD(DUK_DDDPRINT("labelinfo[%ld] ->'%!O' != %!O",
(long) (li - li_start),
(duk_heaphdr *) li->h_label,
(duk_heaphdr *) h_label));
continue;
}
DUK_DDD(DUK_DDDPRINT("labelinfo[%ld] -> '%!O' label name matches (still need to check type)",
(long) (li - li_start), (duk_heaphdr *) h_label));
/* currently all labels accept a break, so no explicit check for it now */
DUK_ASSERT(li->flags & DUK_LABEL_FLAG_ALLOW_BREAK);
if (is_break) {
/* break matches always */
match = 1;
break;
} else if (li->flags & DUK_LABEL_FLAG_ALLOW_CONTINUE) {
/* iteration statements allow continue */
match = 1;
break;
} else {
/* continue matched this label -- we can only continue if this is the empty
* label, for which duplication is allowed, and thus there is hope of
* finding a match deeper in the label stack.
*/
if (h_label != DUK_HTHREAD_STRING_EMPTY_STRING(thr)) {
DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_LABEL);
} else {
DUK_DDD(DUK_DDDPRINT("continue matched an empty label which does not "
"allow a continue -> continue lookup deeper in label stack"));
}
}
}
/* XXX: match flag is awkward, rework */
if (!match) {
DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_LABEL);
}
DUK_DDD(DUK_DDDPRINT("label match: %!O -> label_id %ld, catch_depth=%ld, pc_label=%ld",
(duk_heaphdr *) h_label, (long) li->label_id,
(long) li->catch_depth, (long) li->pc_label));
*out_label_id = li->label_id;
*out_label_catch_depth = li->catch_depth;
*out_label_pc = li->pc_label;
*out_is_closest = (li == li_end - 1);
}
DUK_LOCAL void duk__reset_labels_to_length(duk_compiler_ctx *comp_ctx, duk_int_t len) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_size_t new_size;
/* XXX: duk_set_length */
new_size = sizeof(duk_labelinfo) * (duk_size_t) len;
duk_push_int(ctx, len);
duk_put_prop_stridx(ctx, comp_ctx->curr_func.labelnames_idx, DUK_STRIDX_LENGTH);
duk_hbuffer_resize(thr, comp_ctx->curr_func.h_labelinfos, new_size);
}
/*
* Expression parsing: duk__expr_nud(), duk__expr_led(), duk__expr_lbp(), and helpers.
*
* - duk__expr_nud(): ("null denotation"): process prev_token as a "start" of an expression (e.g. literal)
* - duk__expr_led(): ("left denotation"): process prev_token in the "middle" of an expression (e.g. operator)
* - duk__expr_lbp(): ("left-binding power"): return left-binding power of curr_token
*/
/* object literal key tracking flags */
#define DUK__OBJ_LIT_KEY_PLAIN (1 << 0) /* key encountered as a plain property */
#define DUK__OBJ_LIT_KEY_GET (1 << 1) /* key encountered as a getter */
#define DUK__OBJ_LIT_KEY_SET (1 << 2) /* key encountered as a setter */
DUK_LOCAL void duk__nud_array_literal(duk_compiler_ctx *comp_ctx, duk_ivalue *res) {
duk_hthread *thr = comp_ctx->thr;
duk_reg_t reg_obj; /* result reg */
duk_reg_t reg_temp; /* temp reg */
duk_reg_t temp_start; /* temp reg value for start of loop */
duk_small_uint_t max_init_values; /* max # of values initialized in one MPUTARR set */
duk_small_uint_t num_values; /* number of values in current MPUTARR set */
duk_uarridx_t curr_idx; /* current (next) array index */
duk_uarridx_t start_idx; /* start array index of current MPUTARR set */
duk_uarridx_t init_idx; /* last array index explicitly initialized, +1 */
duk_bool_t require_comma; /* next loop requires a comma */
/* DUK_TOK_LBRACKET already eaten, current token is right after that */
DUK_ASSERT(comp_ctx->prev_token.t == DUK_TOK_LBRACKET);
max_init_values = DUK__MAX_ARRAY_INIT_VALUES; /* XXX: depend on available temps? */
reg_obj = DUK__ALLOCTEMP(comp_ctx);
duk__emit_extraop_b_c(comp_ctx,
DUK_EXTRAOP_NEWARR | DUK__EMIT_FLAG_B_IS_TARGET,
reg_obj,
0); /* XXX: patch initial size afterwards? */
temp_start = DUK__GETTEMP(comp_ctx);
/*
* Emit initializers in sets of maximum max_init_values.
* Corner cases such as single value initializers do not have
* special handling now.
*
* Elided elements must not be emitted as 'undefined' values,
* because such values would be enumerable (which is incorrect).
* Also note that trailing elisions must be reflected in the
* length of the final array but cause no elements to be actually
* inserted.
*/
curr_idx = 0;
init_idx = 0; /* tracks maximum initialized index + 1 */
start_idx = 0;
require_comma = 0;
for (;;) {
num_values = 0;
DUK__SETTEMP(comp_ctx, temp_start);
if (comp_ctx->curr_token.t == DUK_TOK_RBRACKET) {
break;
}
for (;;) {
if (comp_ctx->curr_token.t == DUK_TOK_RBRACKET) {
/* the outer loop will recheck and exit */
break;
}
/* comma check */
if (require_comma) {
if (comp_ctx->curr_token.t == DUK_TOK_COMMA) {
/* comma after a value, expected */
duk__advance(comp_ctx);
require_comma = 0;
continue;
} else {
goto syntax_error;
}
} else {
if (comp_ctx->curr_token.t == DUK_TOK_COMMA) {
/* elision - flush */
curr_idx++;
duk__advance(comp_ctx);
/* if num_values > 0, MPUTARR emitted by outer loop after break */
break;
}
}
/* else an array initializer element */
/* initial index */
if (num_values == 0) {
start_idx = curr_idx;
reg_temp = DUK__ALLOCTEMP(comp_ctx);
duk__emit_load_int32(comp_ctx, reg_temp, (duk_int32_t) start_idx);
}
reg_temp = DUK__ALLOCTEMP(comp_ctx); /* alloc temp just in case, to update max temp */
DUK__SETTEMP(comp_ctx, reg_temp);
duk__expr_toforcedreg(comp_ctx, res, DUK__BP_COMMA /*rbp_flags*/, reg_temp /*forced_reg*/);
DUK__SETTEMP(comp_ctx, reg_temp + 1);
num_values++;
curr_idx++;
require_comma = 1;
if (num_values >= max_init_values) {
/* MPUTARR emitted by outer loop */
break;
}
}
if (num_values > 0) {
/* - A is a source register (it's not a write target, but used
* to identify the target object) but can be shuffled.
* - B cannot be shuffled normally because it identifies a range
* of registers, the emitter has special handling for this
* (the "no shuffle" flag must not be set).
* - C is a non-register number and cannot be shuffled, but
* never needs to be.
*/
duk__emit_a_b_c(comp_ctx,
DUK_OP_MPUTARR |
DUK__EMIT_FLAG_NO_SHUFFLE_C |
DUK__EMIT_FLAG_A_IS_SOURCE,
(duk_regconst_t) reg_obj,
(duk_regconst_t) temp_start,
(duk_regconst_t) num_values);
init_idx = start_idx + num_values;
/* num_values and temp_start reset at top of outer loop */
}
}
DUK_ASSERT(comp_ctx->curr_token.t == DUK_TOK_RBRACKET);
duk__advance(comp_ctx);
DUK_DDD(DUK_DDDPRINT("array literal done, curridx=%ld, initidx=%ld",
(long) curr_idx, (long) init_idx));
/* trailing elisions? */
if (curr_idx > init_idx) {
/* yes, must set array length explicitly */
DUK_DDD(DUK_DDDPRINT("array literal has trailing elisions which affect its length"));
reg_temp = DUK__ALLOCTEMP(comp_ctx);
duk__emit_load_int32(comp_ctx, reg_temp, (duk_int_t) curr_idx);
duk__emit_extraop_b_c(comp_ctx,
DUK_EXTRAOP_SETALEN,
(duk_regconst_t) reg_obj,
(duk_regconst_t) reg_temp);
}
DUK__SETTEMP(comp_ctx, temp_start);
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_REGCONST;
res->x1.regconst = (duk_regconst_t) reg_obj;
return;
syntax_error:
DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_ARRAY_LITERAL);
}
/* duplicate/invalid key checks; returns 1 if syntax error */
DUK_LOCAL duk_bool_t duk__nud_object_literal_key_check(duk_compiler_ctx *comp_ctx, duk_small_uint_t new_key_flags) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_small_uint_t key_flags;
/* [ ... key_obj key ] */
DUK_ASSERT(duk_is_string(ctx, -1));
/*
* 'key_obj' tracks keys encountered so far by associating an
* integer with flags with already encountered keys. The checks
* below implement E5 Section 11.1.5, step 4 for production:
*
* PropertyNameAndValueList: PropertyNameAndValueList , PropertyAssignment
*/
duk_dup(ctx, -1); /* [ ... key_obj key key ] */
duk_get_prop(ctx, -3); /* [ ... key_obj key val ] */
key_flags = duk_to_int(ctx, -1);
duk_pop(ctx); /* [ ... key_obj key ] */
if (new_key_flags & DUK__OBJ_LIT_KEY_PLAIN) {
if ((key_flags & DUK__OBJ_LIT_KEY_PLAIN) && comp_ctx->curr_func.is_strict) {
/* step 4.a */
DUK_DDD(DUK_DDDPRINT("duplicate key: plain key appears twice in strict mode"));
return 1;
}
if (key_flags & (DUK__OBJ_LIT_KEY_GET | DUK__OBJ_LIT_KEY_SET)) {
/* step 4.c */
DUK_DDD(DUK_DDDPRINT("duplicate key: plain key encountered after setter/getter"));
return 1;
}
} else {
if (key_flags & DUK__OBJ_LIT_KEY_PLAIN) {
/* step 4.b */
DUK_DDD(DUK_DDDPRINT("duplicate key: getter/setter encountered after plain key"));
return 1;
}
if (key_flags & new_key_flags) {
/* step 4.d */
DUK_DDD(DUK_DDDPRINT("duplicate key: getter/setter encountered twice"));
return 1;
}
}
new_key_flags |= key_flags;
DUK_DDD(DUK_DDDPRINT("setting/updating key %!T flags: 0x%08lx -> 0x%08lx",
(duk_tval *) duk_get_tval(ctx, -1),
(unsigned long) key_flags,
(unsigned long) new_key_flags));
duk_dup(ctx, -1);
duk_push_int(ctx, new_key_flags); /* [ ... key_obj key key flags ] */
duk_put_prop(ctx, -4); /* [ ... key_obj key ] */
return 0;
}
DUK_LOCAL void duk__nud_object_literal(duk_compiler_ctx *comp_ctx, duk_ivalue *res) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_reg_t reg_obj; /* result reg */
duk_reg_t reg_key; /* temp reg for key literal */
duk_reg_t reg_temp; /* temp reg */
duk_reg_t temp_start; /* temp reg value for start of loop */
duk_small_uint_t max_init_pairs; /* max # of key-value pairs initialized in one MPUTOBJ set */
duk_small_uint_t num_pairs; /* number of pairs in current MPUTOBJ set */
duk_bool_t first; /* first value: comma must not precede the value */
duk_bool_t is_set, is_get; /* temps */
DUK_ASSERT(comp_ctx->prev_token.t == DUK_TOK_LCURLY);
max_init_pairs = DUK__MAX_OBJECT_INIT_PAIRS; /* XXX: depend on available temps? */
reg_obj = DUK__ALLOCTEMP(comp_ctx);
duk__emit_extraop_b_c(comp_ctx,
DUK_EXTRAOP_NEWOBJ | DUK__EMIT_FLAG_B_IS_TARGET,
reg_obj,
0); /* XXX: patch initial size afterwards? */
temp_start = DUK__GETTEMP(comp_ctx);
/* temp object for tracking / detecting duplicate keys */
duk_push_object(ctx);
/*
* Emit initializers in sets of maximum max_init_pairs keys.
* Setter/getter is handled separately and terminates the
* current set of initializer values. Corner cases such as
* single value initializers do not have special handling now.
*/
first = 1;
for (;;) {
num_pairs = 0;
DUK__SETTEMP(comp_ctx, temp_start);
if (comp_ctx->curr_token.t == DUK_TOK_RCURLY) {
break;
}
for (;;) {
/*
* Three possible element formats:
* 1) PropertyName : AssignmentExpression
* 2) get PropertyName () { FunctionBody }
* 3) set PropertyName ( PropertySetParameterList ) { FunctionBody }
*
* PropertyName can be IdentifierName (includes reserved words), a string
* literal, or a number literal. Note that IdentifierName allows 'get' and
* 'set' too, so we need to look ahead to the next token to distinguish:
*
* { get : 1 }
*
* and
*
* { get foo() { return 1 } }
* { get get() { return 1 } } // 'get' as getter propertyname
*
* Finally, a trailing comma is allowed.
*
* Key name is coerced to string at compile time (and ends up as a
* a string constant) even for numeric keys (e.g. "{1:'foo'}").
* These could be emitted using e.g. LDINT, but that seems hardly
* worth the effort and would increase code size.
*/
DUK_DDD(DUK_DDDPRINT("object literal inner loop, curr_token->t = %ld",
(long) comp_ctx->curr_token.t));
if (comp_ctx->curr_token.t == DUK_TOK_RCURLY) {
/* the outer loop will recheck and exit */
break;
}
if (num_pairs >= max_init_pairs) {
/* MPUTOBJ emitted by outer loop */
break;
}
if (first) {
first = 0;
} else {
if (comp_ctx->curr_token.t != DUK_TOK_COMMA) {
goto syntax_error;
}
duk__advance(comp_ctx);
if (comp_ctx->curr_token.t == DUK_TOK_RCURLY) {
/* trailing comma followed by rcurly */
break;
}
}
/* advance to get one step of lookup */
duk__advance(comp_ctx);
/* NOTE: "get" and "set" are not officially ReservedWords and the lexer
* currently treats them always like ordinary identifiers (DUK_TOK_GET
* and DUK_TOK_SET are unused). They need to be detected based on the
* identifier string content.
*/
is_get = (comp_ctx->prev_token.t == DUK_TOK_IDENTIFIER &&
comp_ctx->prev_token.str1 == DUK_HTHREAD_STRING_GET(thr));
is_set = (comp_ctx->prev_token.t == DUK_TOK_IDENTIFIER &&
comp_ctx->prev_token.str1 == DUK_HTHREAD_STRING_SET(thr));
if ((is_get || is_set) && comp_ctx->curr_token.t != DUK_TOK_COLON) {
/* getter/setter */
duk_int_t fnum;
if (comp_ctx->curr_token.t_nores == DUK_TOK_IDENTIFIER ||
comp_ctx->curr_token.t_nores == DUK_TOK_STRING) {
/* same handling for identifiers and strings */
DUK_ASSERT(comp_ctx->curr_token.str1 != NULL);
duk_push_hstring(ctx, comp_ctx->curr_token.str1);
} else if (comp_ctx->curr_token.t == DUK_TOK_NUMBER) {
duk_push_number(ctx, comp_ctx->curr_token.num);
duk_to_string(ctx, -1);
} else {
goto syntax_error;
}
DUK_ASSERT(duk_is_string(ctx, -1));
if (duk__nud_object_literal_key_check(comp_ctx,
(is_get ? DUK__OBJ_LIT_KEY_GET : DUK__OBJ_LIT_KEY_SET))) {
goto syntax_error;
}
reg_key = duk__getconst(comp_ctx);
if (num_pairs > 0) {
/* - A is a source register (it's not a write target, but used
* to identify the target object) but can be shuffled.
* - B cannot be shuffled normally because it identifies a range
* of registers, the emitter has special handling for this
* (the "no shuffle" flag must not be set).
* - C is a non-register number and cannot be shuffled, but
* never needs to be.
*/
duk__emit_a_b_c(comp_ctx,
DUK_OP_MPUTOBJ |
DUK__EMIT_FLAG_NO_SHUFFLE_C |
DUK__EMIT_FLAG_A_IS_SOURCE,
reg_obj,
temp_start,
num_pairs);
num_pairs = 0;
DUK__SETTEMP(comp_ctx, temp_start);
}
/* curr_token = get/set name */
fnum = duk__parse_func_like_fnum(comp_ctx, 0 /*is_decl*/, 1 /*is_setget*/);
DUK_ASSERT(DUK__GETTEMP(comp_ctx) == temp_start);
reg_temp = DUK__ALLOCTEMP(comp_ctx);
duk__emit_a_bc(comp_ctx,
DUK_OP_LDCONST,
(duk_regconst_t) reg_temp,
(duk_regconst_t) reg_key);
reg_temp = DUK__ALLOCTEMP(comp_ctx);
duk__emit_a_bc(comp_ctx,
DUK_OP_CLOSURE,
(duk_regconst_t) reg_temp,
(duk_regconst_t) fnum);
/* Slot C is used in a non-standard fashion (range of regs),
* emitter code has special handling for it (must not set the
* "no shuffle" flag).
*/
duk__emit_extraop_b_c(comp_ctx,
(is_get ? DUK_EXTRAOP_INITGET : DUK_EXTRAOP_INITSET),
reg_obj,
temp_start); /* temp_start+0 = key, temp_start+1 = closure */
DUK__SETTEMP(comp_ctx, temp_start);
} else {
/* normal key/value */
if (comp_ctx->prev_token.t_nores == DUK_TOK_IDENTIFIER ||
comp_ctx->prev_token.t_nores == DUK_TOK_STRING) {
/* same handling for identifiers and strings */
DUK_ASSERT(comp_ctx->prev_token.str1 != NULL);
duk_push_hstring(ctx, comp_ctx->prev_token.str1);
} else if (comp_ctx->prev_token.t == DUK_TOK_NUMBER) {
duk_push_number(ctx, comp_ctx->prev_token.num);
duk_to_string(ctx, -1);
} else {
goto syntax_error;
}
DUK_ASSERT(duk_is_string(ctx, -1));
if (duk__nud_object_literal_key_check(comp_ctx, DUK__OBJ_LIT_KEY_PLAIN)) {
goto syntax_error;
}
reg_key = duk__getconst(comp_ctx);
reg_temp = DUK__ALLOCTEMP(comp_ctx);
duk__emit_a_bc(comp_ctx,
DUK_OP_LDCONST,
(duk_regconst_t) reg_temp,
(duk_regconst_t) reg_key);
duk__advance_expect(comp_ctx, DUK_TOK_COLON);
reg_temp = DUK__ALLOCTEMP(comp_ctx); /* alloc temp just in case, to update max temp */
DUK__SETTEMP(comp_ctx, reg_temp);
duk__expr_toforcedreg(comp_ctx, res, DUK__BP_COMMA /*rbp_flags*/, reg_temp /*forced_reg*/);
DUK__SETTEMP(comp_ctx, reg_temp + 1);
num_pairs++;
}
}
if (num_pairs > 0) {
/* See MPUTOBJ comments above. */
duk__emit_a_b_c(comp_ctx,
DUK_OP_MPUTOBJ |
DUK__EMIT_FLAG_NO_SHUFFLE_C |
DUK__EMIT_FLAG_A_IS_SOURCE,
reg_obj,
temp_start,
num_pairs);
/* num_pairs and temp_start reset at top of outer loop */
}
}
DUK_ASSERT(comp_ctx->curr_token.t == DUK_TOK_RCURLY);
duk__advance(comp_ctx);
DUK__SETTEMP(comp_ctx, temp_start);
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_REGCONST;
res->x1.regconst = (duk_regconst_t) reg_obj;
DUK_DDD(DUK_DDDPRINT("final tracking object: %!T",
(duk_tval *) duk_get_tval(ctx, -1)));
duk_pop(ctx);
return;
syntax_error:
DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_OBJECT_LITERAL);
}
/* Parse argument list. Arguments are written to temps starting from
* "next temp". Returns number of arguments parsed. Expects left paren
* to be already eaten, and eats the right paren before returning.
*/
DUK_LOCAL duk_int_t duk__parse_arguments(duk_compiler_ctx *comp_ctx, duk_ivalue *res) {
duk_int_t nargs = 0;
duk_reg_t reg_temp;
/* Note: expect that caller has already eaten the left paren */
DUK_DDD(DUK_DDDPRINT("start parsing arguments, prev_token.t=%ld, curr_token.t=%ld",
(long) comp_ctx->prev_token.t, (long) comp_ctx->curr_token.t));
for (;;) {
if (comp_ctx->curr_token.t == DUK_TOK_RPAREN) {
break;
}
if (nargs > 0) {
duk__advance_expect(comp_ctx, DUK_TOK_COMMA);
}
/* We want the argument expression value to go to "next temp"
* without additional moves. That should almost always be the
* case, but we double check after expression parsing.
*
* This is not the cleanest possible approach.
*/
reg_temp = DUK__ALLOCTEMP(comp_ctx); /* bump up "allocated" reg count, just in case */
DUK__SETTEMP(comp_ctx, reg_temp);
/* binding power must be high enough to NOT allow comma expressions directly */
duk__expr_toforcedreg(comp_ctx, res, DUK__BP_COMMA /*rbp_flags*/, reg_temp); /* always allow 'in', coerce to 'tr' just in case */
DUK__SETTEMP(comp_ctx, reg_temp + 1);
nargs++;
DUK_DDD(DUK_DDDPRINT("argument #%ld written into reg %ld", (long) nargs, (long) reg_temp));
}
/* eat the right paren */
duk__advance_expect(comp_ctx, DUK_TOK_RPAREN);
DUK_DDD(DUK_DDDPRINT("end parsing arguments"));
return nargs;
}
DUK_LOCAL duk_bool_t duk__expr_is_empty(duk_compiler_ctx *comp_ctx) {
/* empty expressions can be detected conveniently with nud/led counts */
return (comp_ctx->curr_func.nud_count == 0) &&
(comp_ctx->curr_func.led_count == 0);
}
DUK_LOCAL void duk__expr_nud(duk_compiler_ctx *comp_ctx, duk_ivalue *res) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_token *tk;
duk_reg_t temp_at_entry;
duk_small_int_t tok;
duk_uint32_t args; /* temp variable to pass constants and flags to shared code */
/*
* ctx->prev_token token to process with duk__expr_nud()
* ctx->curr_token updated by caller
*
* Note: the token in the switch below has already been eaten.
*/
temp_at_entry = DUK__GETTEMP(comp_ctx);
comp_ctx->curr_func.nud_count++;
tk = &comp_ctx->prev_token;
tok = tk->t;
res->t = DUK_IVAL_NONE;
DUK_DDD(DUK_DDDPRINT("duk__expr_nud(), prev_token.t=%ld, allow_in=%ld, paren_level=%ld",
(long) tk->t, (long) comp_ctx->curr_func.allow_in, (long) comp_ctx->curr_func.paren_level));
switch (tok) {
/* PRIMARY EXPRESSIONS */
case DUK_TOK_THIS: {
duk_reg_t reg_temp;
reg_temp = DUK__ALLOCTEMP(comp_ctx);
duk__emit_extraop_bc(comp_ctx,
DUK_EXTRAOP_LDTHIS,
(duk_regconst_t) reg_temp);
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_REGCONST;
res->x1.regconst = (duk_regconst_t) reg_temp;
return;
}
case DUK_TOK_IDENTIFIER: {
res->t = DUK_IVAL_VAR;
res->x1.t = DUK_ISPEC_VALUE;
duk_push_hstring(ctx, tk->str1);
duk_replace(ctx, res->x1.valstack_idx);
return;
}
case DUK_TOK_NULL: {
duk_push_null(ctx);
goto plain_value;
}
case DUK_TOK_TRUE: {
duk_push_true(ctx);
goto plain_value;
}
case DUK_TOK_FALSE: {
duk_push_false(ctx);
goto plain_value;
}
case DUK_TOK_NUMBER: {
duk_push_number(ctx, tk->num);
goto plain_value;
}
case DUK_TOK_STRING: {
DUK_ASSERT(tk->str1 != NULL);
duk_push_hstring(ctx, tk->str1);
goto plain_value;
}
case DUK_TOK_REGEXP: {
#ifdef DUK_USE_REGEXP_SUPPORT
duk_reg_t reg_temp;
duk_regconst_t rc_re_bytecode; /* const */
duk_regconst_t rc_re_source; /* const */
DUK_ASSERT(tk->str1 != NULL);
DUK_ASSERT(tk->str2 != NULL);
DUK_DDD(DUK_DDDPRINT("emitting regexp op, str1=%!O, str2=%!O",
(duk_heaphdr *) tk->str1,
(duk_heaphdr *) tk->str2));
reg_temp = DUK__ALLOCTEMP(comp_ctx);
duk_push_hstring(ctx, tk->str1);
duk_push_hstring(ctx, tk->str2);
/* [ ... pattern flags ] */
duk_regexp_compile(thr);
/* [ ... escaped_source bytecode ] */
rc_re_bytecode = duk__getconst(comp_ctx);
rc_re_source = duk__getconst(comp_ctx);
duk__emit_a_b_c(comp_ctx,
DUK_OP_REGEXP,
(duk_regconst_t) reg_temp /*a*/,
rc_re_bytecode /*b*/,
rc_re_source /*c*/);
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_REGCONST;
res->x1.regconst = (duk_regconst_t) reg_temp;
return;
#else /* DUK_USE_REGEXP_SUPPORT */
goto syntax_error;
#endif /* DUK_USE_REGEXP_SUPPORT */
}
case DUK_TOK_LBRACKET: {
DUK_DDD(DUK_DDDPRINT("parsing array literal"));
duk__nud_array_literal(comp_ctx, res);
return;
}
case DUK_TOK_LCURLY: {
DUK_DDD(DUK_DDDPRINT("parsing object literal"));
duk__nud_object_literal(comp_ctx, res);
return;
}
case DUK_TOK_LPAREN: {
duk_bool_t prev_allow_in;
comp_ctx->curr_func.paren_level++;
prev_allow_in = comp_ctx->curr_func.allow_in;
comp_ctx->curr_func.allow_in = 1; /* reset 'allow_in' for parenthesized expression */
duk__expr(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/); /* Expression, terminates at a ')' */
duk__advance_expect(comp_ctx, DUK_TOK_RPAREN);
comp_ctx->curr_func.allow_in = prev_allow_in;
comp_ctx->curr_func.paren_level--;
return;
}
/* MEMBER/NEW/CALL EXPRESSIONS */
case DUK_TOK_NEW: {
/*
* Parsing an expression starting with 'new' is tricky because
* there are multiple possible productions deriving from
* LeftHandSideExpression which begin with 'new'.
*
* We currently resort to one-token lookahead to distinguish the
* cases. Hopefully this is correct. The binding power must be
* such that parsing ends at an LPAREN (CallExpression) but not at
* a PERIOD or LBRACKET (MemberExpression).
*
* See doc/compiler.rst for discussion on the parsing approach,
* and testcases/test-dev-new.js for a bunch of documented tests.
*/
duk_reg_t reg_target;
duk_int_t nargs;
DUK_DDD(DUK_DDDPRINT("begin parsing new expression"));
reg_target = DUK__ALLOCTEMP(comp_ctx);
duk__expr_toforcedreg(comp_ctx, res, DUK__BP_CALL /*rbp_flags*/, reg_target /*forced_reg*/);
DUK__SETTEMP(comp_ctx, reg_target + 1);
if (comp_ctx->curr_token.t == DUK_TOK_LPAREN) {
/* 'new' MemberExpression Arguments */
DUK_DDD(DUK_DDDPRINT("new expression has argument list"));
duk__advance(comp_ctx);
nargs = duk__parse_arguments(comp_ctx, res); /* parse args starting from "next temp", reg_target + 1 */
/* right paren eaten */
} else {
/* 'new' MemberExpression */
DUK_DDD(DUK_DDDPRINT("new expression has no argument list"));
nargs = 0;
}
/* Opcode slot C is used in a non-standard way, so shuffling
* is not allowed.
*/
duk__emit_a_b_c(comp_ctx,
DUK_OP_NEW | DUK__EMIT_FLAG_NO_SHUFFLE_A | DUK__EMIT_FLAG_NO_SHUFFLE_C,
0 /*unused*/,
reg_target /*target*/,
nargs /*num_args*/);
DUK_DDD(DUK_DDDPRINT("end parsing new expression"));
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_REGCONST;
res->x1.regconst = (duk_regconst_t) reg_target;
return;
}
/* FUNCTION EXPRESSIONS */
case DUK_TOK_FUNCTION: {
/* Function expression. Note that any statement beginning with 'function'
* is handled by the statement parser as a function declaration, or a
* non-standard function expression/statement (or a SyntaxError). We only
* handle actual function expressions (occurring inside an expression) here.
*
* O(depth^2) parse count for inner functions is handled by recording a
* lexer offset on the first compilation pass, so that the function can
* be efficiently skipped on the second pass. This is encapsulated into
* duk__parse_func_like_fnum().
*/
duk_reg_t reg_temp;
duk_int_t fnum;
reg_temp = DUK__ALLOCTEMP(comp_ctx);
/* curr_token follows 'function' */
fnum = duk__parse_func_like_fnum(comp_ctx, 0 /*is_decl*/, 0 /*is_setget*/);
DUK_DDD(DUK_DDDPRINT("parsed inner function -> fnum %ld", (long) fnum));
duk__emit_a_bc(comp_ctx,
DUK_OP_CLOSURE,
(duk_regconst_t) reg_temp /*a*/,
(duk_regconst_t) fnum /*bc*/);
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_REGCONST;
res->x1.regconst = (duk_regconst_t) reg_temp;
return;
}
/* UNARY EXPRESSIONS */
case DUK_TOK_DELETE: {
/* Delete semantics are a bit tricky. The description in E5 specification
* is kind of confusing, because it distinguishes between resolvability of
* a reference (which is only known at runtime) seemingly at compile time
* (= SyntaxError throwing).
*/
duk__expr(comp_ctx, res, DUK__BP_MULTIPLICATIVE /*rbp_flags*/); /* UnaryExpression */
if (res->t == DUK_IVAL_VAR) {
/* not allowed in strict mode, regardless of whether resolves;
* in non-strict mode DELVAR handles both non-resolving and
* resolving cases (the specification description is a bit confusing).
*/
duk_reg_t reg_temp;
duk_reg_t reg_varbind;
duk_regconst_t rc_varname;
if (comp_ctx->curr_func.is_strict) {
DUK_ERROR_SYNTAX(thr, DUK_STR_CANNOT_DELETE_IDENTIFIER);
}
DUK__SETTEMP(comp_ctx, temp_at_entry);
reg_temp = DUK__ALLOCTEMP(comp_ctx);
duk_dup(ctx, res->x1.valstack_idx);
if (duk__lookup_lhs(comp_ctx, &reg_varbind, &rc_varname)) {
/* register bound variables are non-configurable -> always false */
duk__emit_extraop_bc(comp_ctx,
DUK_EXTRAOP_LDFALSE,
(duk_regconst_t) reg_temp);
} else {
duk_dup(ctx, res->x1.valstack_idx);
rc_varname = duk__getconst(comp_ctx);
duk__emit_a_b(comp_ctx,
DUK_OP_DELVAR,
(duk_regconst_t) reg_temp,
(duk_regconst_t) rc_varname);
}
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_REGCONST;
res->x1.regconst = (duk_regconst_t) reg_temp;
} else if (res->t == DUK_IVAL_PROP) {
duk_reg_t reg_temp;
duk_reg_t reg_obj;
duk_regconst_t rc_key;
DUK__SETTEMP(comp_ctx, temp_at_entry);
reg_temp = DUK__ALLOCTEMP(comp_ctx);
reg_obj = duk__ispec_toregconst_raw(comp_ctx, &res->x1, -1 /*forced_reg*/, 0 /*flags*/); /* don't allow const */
rc_key = duk__ispec_toregconst_raw(comp_ctx, &res->x2, -1 /*forced_reg*/, DUK__IVAL_FLAG_ALLOW_CONST /*flags*/);
duk__emit_a_b_c(comp_ctx,
DUK_OP_DELPROP,
(duk_regconst_t) reg_temp,
(duk_regconst_t) reg_obj,
rc_key);
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_REGCONST;
res->x1.regconst = (duk_regconst_t) reg_temp;
} else {
/* non-Reference deletion is always 'true', even in strict mode */
duk_push_true(ctx);
goto plain_value;
}
return;
}
case DUK_TOK_VOID: {
duk__expr_toplain_ignore(comp_ctx, res, DUK__BP_MULTIPLICATIVE /*rbp_flags*/); /* UnaryExpression */
duk_push_undefined(ctx);
goto plain_value;
}
case DUK_TOK_TYPEOF: {
/* 'typeof' must handle unresolvable references without throwing
* a ReferenceError (E5 Section 11.4.3). Register mapped values
* will never be unresolvable so special handling is only required
* when an identifier is a "slow path" one.
*/
duk__expr(comp_ctx, res, DUK__BP_MULTIPLICATIVE /*rbp_flags*/); /* UnaryExpression */
if (res->t == DUK_IVAL_VAR) {
duk_reg_t reg_varbind;
duk_regconst_t rc_varname;
duk_reg_t reg_temp;
duk_dup(ctx, res->x1.valstack_idx);
if (!duk__lookup_lhs(comp_ctx, &reg_varbind, &rc_varname)) {
DUK_DDD(DUK_DDDPRINT("typeof for an identifier name which could not be resolved "
"at compile time, need to use special run-time handling"));
reg_temp = DUK__ALLOCTEMP(comp_ctx);
duk__emit_extraop_b_c(comp_ctx,
DUK_EXTRAOP_TYPEOFID | DUK__EMIT_FLAG_B_IS_TARGET,
reg_temp,
rc_varname);
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_REGCONST;
res->x1.regconst = (duk_regconst_t) reg_temp;
return;
}
}
args = (DUK_EXTRAOP_TYPEOF << 8) + 0;
goto unary_extraop;
}
case DUK_TOK_INCREMENT: {
args = (DUK_OP_PREINCR << 8) + 0;
goto preincdec;
}
case DUK_TOK_DECREMENT: {
args = (DUK_OP_PREDECR << 8) + 0;
goto preincdec;
}
case DUK_TOK_ADD: {
/* unary plus */
duk__expr(comp_ctx, res, DUK__BP_MULTIPLICATIVE /*rbp_flags*/); /* UnaryExpression */
if (res->t == DUK_IVAL_PLAIN && res->x1.t == DUK_ISPEC_VALUE &&
duk_is_number(ctx, res->x1.valstack_idx)) {
/* unary plus of a number is identity */
;
return;
}
args = (DUK_EXTRAOP_UNP << 8) + 0;
goto unary_extraop;
}
case DUK_TOK_SUB: {
/* unary minus */
duk__expr(comp_ctx, res, DUK__BP_MULTIPLICATIVE /*rbp_flags*/); /* UnaryExpression */
if (res->t == DUK_IVAL_PLAIN && res->x1.t == DUK_ISPEC_VALUE &&
duk_is_number(ctx, res->x1.valstack_idx)) {
/* this optimization is important to handle negative literals
* (which are not directly provided by the lexical grammar)
*/
duk_tval *tv_num;
duk_double_union du;
tv_num = DUK_GET_TVAL_POSIDX(ctx, res->x1.valstack_idx);
DUK_ASSERT(tv_num != NULL);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_num));
du.d = DUK_TVAL_GET_NUMBER(tv_num);
du.d = -du.d;
DUK_DBLUNION_NORMALIZE_NAN_CHECK(&du);
DUK_TVAL_SET_NUMBER(tv_num, du.d);
return;
}
args = (DUK_EXTRAOP_UNM << 8) + 0;
goto unary_extraop;
}
case DUK_TOK_BNOT: {
duk__expr(comp_ctx, res, DUK__BP_MULTIPLICATIVE /*rbp_flags*/); /* UnaryExpression */
args = (DUK_EXTRAOP_BNOT << 8) + 0;
goto unary_extraop;
}
case DUK_TOK_LNOT: {
duk__expr(comp_ctx, res, DUK__BP_MULTIPLICATIVE /*rbp_flags*/); /* UnaryExpression */
if (res->t == DUK_IVAL_PLAIN && res->x1.t == DUK_ISPEC_VALUE) {
/* Very minimal inlining to handle common idioms '!0' and '!1',
* and also boolean arguments like '!false' and '!true'.
*/
duk_tval *tv_val;
tv_val = DUK_GET_TVAL_POSIDX(ctx, res->x1.valstack_idx);
DUK_ASSERT(tv_val != NULL);
if (DUK_TVAL_IS_NUMBER(tv_val)) {
duk_double_t d;
d = DUK_TVAL_GET_NUMBER(tv_val);
if (d == 0.0) {
/* Matches both +0 and -0 on purpose. */
DUK_DDD(DUK_DDDPRINT("inlined lnot: !0 -> true"));
DUK_TVAL_SET_BOOLEAN_TRUE(tv_val);
return;
} else if (d == 1.0) {
DUK_DDD(DUK_DDDPRINT("inlined lnot: !1 -> false"));
DUK_TVAL_SET_BOOLEAN_FALSE(tv_val);
return;
}
} else if (DUK_TVAL_IS_BOOLEAN(tv_val)) {
duk_small_int_t v;
v = DUK_TVAL_GET_BOOLEAN(tv_val);
DUK_DDD(DUK_DDDPRINT("inlined lnot boolean: %ld", (long) v));
DUK_ASSERT(v == 0 || v == 1);
DUK_TVAL_SET_BOOLEAN(tv_val, v ^ 0x01);
return;
}
}
args = (DUK_EXTRAOP_LNOT << 8) + 0;
goto unary_extraop;
}
} /* end switch */
DUK_ERROR_SYNTAX(thr, DUK_STR_PARSE_ERROR);
return;
unary_extraop:
{
/* Note: must coerce to a (writable) temp register, so that e.g. "!x" where x
* is a reg-mapped variable works correctly (does not mutate the variable register).
*/
duk_reg_t reg_temp;
reg_temp = duk__ivalue_toregconst_raw(comp_ctx, res, -1 /*forced_reg*/, DUK__IVAL_FLAG_REQUIRE_TEMP /*flags*/);
duk__emit_extraop_bc(comp_ctx,
(args >> 8),
(duk_regconst_t) reg_temp);
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_REGCONST;
res->x1.regconst = (duk_regconst_t) reg_temp;
return;
}
preincdec:
{
/* preincrement and predecrement */
duk_reg_t reg_res;
duk_small_uint_t args_op = args >> 8;
/* Specific assumptions for opcode numbering. */
DUK_ASSERT(DUK_OP_PREINCR + 4 == DUK_OP_PREINCV);
DUK_ASSERT(DUK_OP_PREDECR + 4 == DUK_OP_PREDECV);
DUK_ASSERT(DUK_OP_PREINCR + 8 == DUK_OP_PREINCP);
DUK_ASSERT(DUK_OP_PREDECR + 8 == DUK_OP_PREDECP);
reg_res = DUK__ALLOCTEMP(comp_ctx);
duk__expr(comp_ctx, res, DUK__BP_MULTIPLICATIVE /*rbp_flags*/); /* UnaryExpression */
if (res->t == DUK_IVAL_VAR) {
duk_hstring *h_varname;
duk_reg_t reg_varbind;
duk_regconst_t rc_varname;
h_varname = duk_get_hstring(ctx, res->x1.valstack_idx);
DUK_ASSERT(h_varname != NULL);
if (duk__hstring_is_eval_or_arguments_in_strict_mode(comp_ctx, h_varname)) {
goto syntax_error;
}
duk_dup(ctx, res->x1.valstack_idx);
if (duk__lookup_lhs(comp_ctx, &reg_varbind, &rc_varname)) {
duk__emit_a_bc(comp_ctx,
args_op, /* e.g. DUK_OP_PREINCR */
(duk_regconst_t) reg_res,
(duk_regconst_t) reg_varbind);
} else {
duk__emit_a_bc(comp_ctx,
args_op + 4, /* e.g. DUK_OP_PREINCV */
(duk_regconst_t) reg_res,
rc_varname);
}
DUK_DDD(DUK_DDDPRINT("preincdec to '%!O' -> reg_varbind=%ld, rc_varname=%ld",
(duk_heaphdr *) h_varname, (long) reg_varbind, (long) rc_varname));
} else if (res->t == DUK_IVAL_PROP) {
duk_reg_t reg_obj; /* allocate to reg only (not const) */
duk_regconst_t rc_key;
reg_obj = duk__ispec_toregconst_raw(comp_ctx, &res->x1, -1 /*forced_reg*/, 0 /*flags*/); /* don't allow const */
rc_key = duk__ispec_toregconst_raw(comp_ctx, &res->x2, -1 /*forced_reg*/, DUK__IVAL_FLAG_ALLOW_CONST /*flags*/);
duk__emit_a_b_c(comp_ctx,
args_op + 8, /* e.g. DUK_OP_PREINCP */
(duk_regconst_t) reg_res,
(duk_regconst_t) reg_obj,
rc_key);
} else {
/* Technically return value is not needed because INVLHS will
* unconditially throw a ReferenceError. Coercion is necessary
* for proper semantics (consider ToNumber() called for an object).
* Use DUK_EXTRAOP_UNP with a dummy register to get ToNumber().
*/
duk__ivalue_toforcedreg(comp_ctx, res, reg_res);
duk__emit_extraop_bc(comp_ctx,
DUK_EXTRAOP_UNP,
reg_res); /* for side effects, result ignored */
duk__emit_extraop_only(comp_ctx,
DUK_EXTRAOP_INVLHS);
}
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_REGCONST;
res->x1.regconst = (duk_regconst_t) reg_res;
DUK__SETTEMP(comp_ctx, reg_res + 1);
return;
}
plain_value:
{
/* Stack top contains plain value */
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_VALUE;
duk_replace(ctx, res->x1.valstack_idx);
return;
}
syntax_error:
DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_EXPRESSION);
}
/* XXX: add flag to indicate whether caller cares about return value; this
* affects e.g. handling of assignment expressions. This change needs API
* changes elsewhere too.
*/
DUK_LOCAL void duk__expr_led(duk_compiler_ctx *comp_ctx, duk_ivalue *left, duk_ivalue *res) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_token *tk;
duk_small_int_t tok;
duk_uint32_t args; /* temp variable to pass constants and flags to shared code */
/*
* ctx->prev_token token to process with duk__expr_led()
* ctx->curr_token updated by caller
*/
comp_ctx->curr_func.led_count++;
/* The token in the switch has already been eaten here */
tk = &comp_ctx->prev_token;
tok = tk->t;
DUK_DDD(DUK_DDDPRINT("duk__expr_led(), prev_token.t=%ld, allow_in=%ld, paren_level=%ld",
(long) tk->t, (long) comp_ctx->curr_func.allow_in, (long) comp_ctx->curr_func.paren_level));
/* XXX: default priority for infix operators is duk__expr_lbp(tok) -> get it here? */
switch (tok) {
/* PRIMARY EXPRESSIONS */
case DUK_TOK_PERIOD: {
/* Property access expressions are critical for correct LHS ordering,
* see comments in duk__expr()!
*
* A conservative approach would be to use duk__ivalue_totempconst()
* for 'left'. However, allowing a reg-bound variable seems safe here
* and is nice because "foo.bar" is a common expression. If the ivalue
* is used in an expression a GETPROP will occur before any changes to
* the base value can occur. If the ivalue is used as an assignment
* LHS, the assignment code will ensure the base value is safe from
* RHS mutation.
*/
/* XXX: This now coerces an identifier into a GETVAR to a temp, which
* causes an extra LDREG in call setup. It's sufficient to coerce to a
* unary ivalue?
*/
duk__ivalue_toplain(comp_ctx, left);
/* NB: must accept reserved words as property name */
if (comp_ctx->curr_token.t_nores != DUK_TOK_IDENTIFIER) {
DUK_ERROR_SYNTAX(thr, DUK_STR_EXPECTED_IDENTIFIER);
}
res->t = DUK_IVAL_PROP;
duk__copy_ispec(comp_ctx, &left->x1, &res->x1); /* left.x1 -> res.x1 */
DUK_ASSERT(comp_ctx->curr_token.str1 != NULL);
duk_push_hstring(ctx, comp_ctx->curr_token.str1);
duk_replace(ctx, res->x2.valstack_idx);
res->x2.t = DUK_ISPEC_VALUE;
/* special RegExp literal handling after IdentifierName */
comp_ctx->curr_func.reject_regexp_in_adv = 1;
duk__advance(comp_ctx);
return;
}
case DUK_TOK_LBRACKET: {
/* Property access expressions are critical for correct LHS ordering,
* see comments in duk__expr()!
*/
/* XXX: optimize temp reg use */
/* XXX: similar coercion issue as in DUK_TOK_PERIOD */
/* XXX: coerce to regs? it might be better for enumeration use, where the
* same PROP ivalue is used multiple times. Or perhaps coerce PROP further
* there?
*/
/* XXX: for simple cases like x['y'] an unnecessary LDREG is
* emitted for the base value; could avoid it if we knew that
* the key expression is safe (e.g. just a single literal).
*/
/* The 'left' value must not be a register bound variable
* because it may be mutated during the rest of the expression
* and E5.1 Section 11.2.1 specifies the order of evaluation
* so that the base value is evaluated first.
* See: test-bug-nested-prop-mutate.js.
*/
duk__ivalue_totempconst(comp_ctx, left);
duk__expr_toplain(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/); /* Expression, ']' terminates */
duk__advance_expect(comp_ctx, DUK_TOK_RBRACKET);
res->t = DUK_IVAL_PROP;
duk__copy_ispec(comp_ctx, &res->x1, &res->x2); /* res.x1 -> res.x2 */
duk__copy_ispec(comp_ctx, &left->x1, &res->x1); /* left.x1 -> res.x1 */
return;
}
case DUK_TOK_LPAREN: {
/* function call */
duk_reg_t reg_cs = DUK__ALLOCTEMPS(comp_ctx, 2);
duk_int_t nargs;
duk_small_uint_t call_flags = 0;
/*
* XXX: attempt to get the call result to "next temp" whenever
* possible to avoid unnecessary register shuffles.
*
* XXX: CSPROP (and CSREG) can overwrite the call target register, and save one temp,
* if the call target is a temporary register and at the top of the temp reg "stack".
*/
/*
* Setup call: target and 'this' binding. Three cases:
*
* 1. Identifier base (e.g. "foo()")
* 2. Property base (e.g. "foo.bar()")
* 3. Register base (e.g. "foo()()"; i.e. when a return value is a function)
*/
if (left->t == DUK_IVAL_VAR) {
duk_hstring *h_varname;
duk_reg_t reg_varbind;
duk_regconst_t rc_varname;
DUK_DDD(DUK_DDDPRINT("function call with identifier base"));
h_varname = duk_get_hstring(ctx, left->x1.valstack_idx);
DUK_ASSERT(h_varname != NULL);
if (h_varname == DUK_HTHREAD_STRING_EVAL(thr)) {
/* Potential direct eval call detected, flag the CALL
* so that a run-time "direct eval" check is made and
* special behavior may be triggered. Note that this
* does not prevent 'eval' from being register bound.
*/
DUK_DDD(DUK_DDDPRINT("function call with identifier 'eval' "
"-> enabling EVALCALL flag, marking function "
"as may_direct_eval"));
call_flags |= DUK_BC_CALL_FLAG_EVALCALL;
comp_ctx->curr_func.may_direct_eval = 1;
}
duk_dup(ctx, left->x1.valstack_idx);
if (duk__lookup_lhs(comp_ctx, &reg_varbind, &rc_varname)) {
duk__emit_a_b(comp_ctx,
DUK_OP_CSREG,
(duk_regconst_t) (reg_cs + 0),
(duk_regconst_t) reg_varbind);
} else {
duk__emit_a_b(comp_ctx,
DUK_OP_CSVAR,
(duk_regconst_t) (reg_cs + 0),
rc_varname);
}
} else if (left->t == DUK_IVAL_PROP) {
DUK_DDD(DUK_DDDPRINT("function call with property base"));
duk__ispec_toforcedreg(comp_ctx, &left->x1, reg_cs + 0); /* base */
duk__ispec_toforcedreg(comp_ctx, &left->x2, reg_cs + 1); /* key */
duk__emit_a_b_c(comp_ctx,
DUK_OP_CSPROP,
(duk_regconst_t) (reg_cs + 0),
(duk_regconst_t) (reg_cs + 0),
(duk_regconst_t) (reg_cs + 1)); /* in-place setup */
} else {
DUK_DDD(DUK_DDDPRINT("function call with register base"));
duk__ivalue_toforcedreg(comp_ctx, left, reg_cs + 0);
duk__emit_a_b(comp_ctx,
DUK_OP_CSREG,
(duk_regconst_t) (reg_cs + 0),
(duk_regconst_t) (reg_cs + 0)); /* in-place setup */
}
DUK__SETTEMP(comp_ctx, reg_cs + 2);
nargs = duk__parse_arguments(comp_ctx, res); /* parse args starting from "next temp" */
/* Tailcalls are handled by back-patching the TAILCALL flag to the
* already emitted instruction later (in return statement parser).
* Since A and C have a special meaning here, they cannot be "shuffled".
*/
duk__emit_a_b_c(comp_ctx,
DUK_OP_CALL | DUK__EMIT_FLAG_NO_SHUFFLE_A | DUK__EMIT_FLAG_NO_SHUFFLE_C,
(duk_regconst_t) call_flags /*flags*/,
(duk_regconst_t) reg_cs /*basereg*/,
(duk_regconst_t) nargs /*numargs*/);
DUK__SETTEMP(comp_ctx, reg_cs + 1); /* result in csreg */
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_REGCONST;
res->x1.regconst = (duk_regconst_t) reg_cs;
return;
}
/* POSTFIX EXPRESSION */
case DUK_TOK_INCREMENT: {
args = (DUK_OP_POSTINCR << 8) + 0;
goto postincdec;
}
case DUK_TOK_DECREMENT: {
args = (DUK_OP_POSTDECR << 8) + 0;
goto postincdec;
}
/* MULTIPLICATIVE EXPRESSION */
case DUK_TOK_MUL: {
args = (DUK_OP_MUL << 8) + DUK__BP_MULTIPLICATIVE; /* UnaryExpression */
goto binary;
}
case DUK_TOK_DIV: {
args = (DUK_OP_DIV << 8) + DUK__BP_MULTIPLICATIVE; /* UnaryExpression */
goto binary;
}
case DUK_TOK_MOD: {
args = (DUK_OP_MOD << 8) + DUK__BP_MULTIPLICATIVE; /* UnaryExpression */
goto binary;
}
/* ADDITIVE EXPRESSION */
case DUK_TOK_ADD: {
args = (DUK_OP_ADD << 8) + DUK__BP_ADDITIVE; /* MultiplicativeExpression */
goto binary;
}
case DUK_TOK_SUB: {
args = (DUK_OP_SUB << 8) + DUK__BP_ADDITIVE; /* MultiplicativeExpression */
goto binary;
}
/* SHIFT EXPRESSION */
case DUK_TOK_ALSHIFT: {
/* << */
args = (DUK_OP_BASL << 8) + DUK__BP_SHIFT;
goto binary;
}
case DUK_TOK_ARSHIFT: {
/* >> */
args = (DUK_OP_BASR << 8) + DUK__BP_SHIFT;
goto binary;
}
case DUK_TOK_RSHIFT: {
/* >>> */
args = (DUK_OP_BLSR << 8) + DUK__BP_SHIFT;
goto binary;
}
/* RELATIONAL EXPRESSION */
case DUK_TOK_LT: {
/* < */
args = (DUK_OP_LT << 8) + DUK__BP_RELATIONAL;
goto binary;
}
case DUK_TOK_GT: {
args = (DUK_OP_GT << 8) + DUK__BP_RELATIONAL;
goto binary;
}
case DUK_TOK_LE: {
args = (DUK_OP_LE << 8) + DUK__BP_RELATIONAL;
goto binary;
}
case DUK_TOK_GE: {
args = (DUK_OP_GE << 8) + DUK__BP_RELATIONAL;
goto binary;
}
case DUK_TOK_INSTANCEOF: {
args = (1 << 16 /*is_extra*/) + (DUK_EXTRAOP_INSTOF << 8) + DUK__BP_RELATIONAL;
goto binary;
}
case DUK_TOK_IN: {
args = (1 << 16 /*is_extra*/) + (DUK_EXTRAOP_IN << 8) + DUK__BP_RELATIONAL;
goto binary;
}
/* EQUALITY EXPRESSION */
case DUK_TOK_EQ: {
args = (DUK_OP_EQ << 8) + DUK__BP_EQUALITY;
goto binary;
}
case DUK_TOK_NEQ: {
args = (DUK_OP_NEQ << 8) + DUK__BP_EQUALITY;
goto binary;
}
case DUK_TOK_SEQ: {
args = (DUK_OP_SEQ << 8) + DUK__BP_EQUALITY;
goto binary;
}
case DUK_TOK_SNEQ: {
args = (DUK_OP_SNEQ << 8) + DUK__BP_EQUALITY;
goto binary;
}
/* BITWISE EXPRESSIONS */
case DUK_TOK_BAND: {
args = (DUK_OP_BAND << 8) + DUK__BP_BAND;
goto binary;
}
case DUK_TOK_BXOR: {
args = (DUK_OP_BXOR << 8) + DUK__BP_BXOR;
goto binary;
}
case DUK_TOK_BOR: {
args = (DUK_OP_BOR << 8) + DUK__BP_BOR;
goto binary;
}
/* LOGICAL EXPRESSIONS */
case DUK_TOK_LAND: {
/* syntactically left-associative but parsed as right-associative */
args = (1 << 8) + DUK__BP_LAND - 1;
goto binary_logical;
}
case DUK_TOK_LOR: {
/* syntactically left-associative but parsed as right-associative */
args = (0 << 8) + DUK__BP_LOR - 1;
goto binary_logical;
}
/* CONDITIONAL EXPRESSION */
case DUK_TOK_QUESTION: {
/* XXX: common reg allocation need is to reuse a sub-expression's temp reg,
* but only if it really is a temp. Nothing fancy here now.
*/
duk_reg_t reg_temp;
duk_int_t pc_jump1;
duk_int_t pc_jump2;
reg_temp = DUK__ALLOCTEMP(comp_ctx);
duk__ivalue_toforcedreg(comp_ctx, left, reg_temp);
duk__emit_if_true_skip(comp_ctx, reg_temp);
pc_jump1 = duk__emit_jump_empty(comp_ctx); /* jump to false */
duk__expr_toforcedreg(comp_ctx, res, DUK__BP_COMMA /*rbp_flags*/, reg_temp /*forced_reg*/); /* AssignmentExpression */
duk__advance_expect(comp_ctx, DUK_TOK_COLON);
pc_jump2 = duk__emit_jump_empty(comp_ctx); /* jump to end */
duk__patch_jump_here(comp_ctx, pc_jump1);
duk__expr_toforcedreg(comp_ctx, res, DUK__BP_COMMA /*rbp_flags*/, reg_temp /*forced_reg*/); /* AssignmentExpression */
duk__patch_jump_here(comp_ctx, pc_jump2);
DUK__SETTEMP(comp_ctx, reg_temp + 1);
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_REGCONST;
res->x1.regconst = (duk_regconst_t) reg_temp;
return;
}
/* ASSIGNMENT EXPRESSION */
case DUK_TOK_EQUALSIGN: {
/*
* Assignments are right associative, allows e.g.
* a = 5;
* a += b = 9; // same as a += (b = 9)
* -> expression value 14, a = 14, b = 9
*
* Right associativiness is reflected in the BP for recursion,
* "-1" ensures assignment operations are allowed.
*
* XXX: just use DUK__BP_COMMA (i.e. no need for 2-step bp levels)?
*/
args = (DUK_OP_NONE << 8) + DUK__BP_ASSIGNMENT - 1; /* DUK_OP_NONE marks a 'plain' assignment */
goto assign;
}
case DUK_TOK_ADD_EQ: {
/* right associative */
args = (DUK_OP_ADD << 8) + DUK__BP_ASSIGNMENT - 1;
goto assign;
}
case DUK_TOK_SUB_EQ: {
/* right associative */
args = (DUK_OP_SUB << 8) + DUK__BP_ASSIGNMENT - 1;
goto assign;
}
case DUK_TOK_MUL_EQ: {
/* right associative */
args = (DUK_OP_MUL << 8) + DUK__BP_ASSIGNMENT - 1;
goto assign;
}
case DUK_TOK_DIV_EQ: {
/* right associative */
args = (DUK_OP_DIV << 8) + DUK__BP_ASSIGNMENT - 1;
goto assign;
}
case DUK_TOK_MOD_EQ: {
/* right associative */
args = (DUK_OP_MOD << 8) + DUK__BP_ASSIGNMENT - 1;
goto assign;
}
case DUK_TOK_ALSHIFT_EQ: {
/* right associative */
args = (DUK_OP_BASL << 8) + DUK__BP_ASSIGNMENT - 1;
goto assign;
}
case DUK_TOK_ARSHIFT_EQ: {
/* right associative */
args = (DUK_OP_BASR << 8) + DUK__BP_ASSIGNMENT - 1;
goto assign;
}
case DUK_TOK_RSHIFT_EQ: {
/* right associative */
args = (DUK_OP_BLSR << 8) + DUK__BP_ASSIGNMENT - 1;
goto assign;
}
case DUK_TOK_BAND_EQ: {
/* right associative */
args = (DUK_OP_BAND << 8) + DUK__BP_ASSIGNMENT - 1;
goto assign;
}
case DUK_TOK_BOR_EQ: {
/* right associative */
args = (DUK_OP_BOR << 8) + DUK__BP_ASSIGNMENT - 1;
goto assign;
}
case DUK_TOK_BXOR_EQ: {
/* right associative */
args = (DUK_OP_BXOR << 8) + DUK__BP_ASSIGNMENT - 1;
goto assign;
}
/* COMMA */
case DUK_TOK_COMMA: {
/* right associative */
duk__ivalue_toplain_ignore(comp_ctx, left); /* need side effects, not value */
duk__expr_toplain(comp_ctx, res, DUK__BP_COMMA - 1 /*rbp_flags*/);
/* return 'res' (of right part) as our result */
return;
}
default: {
break;
}
}
DUK_D(DUK_DPRINT("parse error: unexpected token: %ld", (long) tok));
DUK_ERROR_SYNTAX(thr, DUK_STR_PARSE_ERROR);
return;
#if 0
/* XXX: shared handling for 'duk__expr_lhs'? */
if (comp_ctx->curr_func.paren_level == 0 && XXX) {
comp_ctx->curr_func.duk__expr_lhs = 0;
}
#endif
binary:
/*
* Shared handling of binary operations
*
* args = (is_extraop << 16) + (opcode << 8) + rbp
*/
{
duk__ivalue_toplain(comp_ctx, left);
duk__expr_toplain(comp_ctx, res, args & 0xff /*rbp_flags*/);
/* combine left->x1 and res->x1 (right->x1, really) -> (left->x1 OP res->x1) */
DUK_ASSERT(left->t == DUK_IVAL_PLAIN);
DUK_ASSERT(res->t == DUK_IVAL_PLAIN);
res->t = (args >> 16) ? DUK_IVAL_ARITH_EXTRAOP : DUK_IVAL_ARITH;
res->op = (args >> 8) & 0xff;
res->x2.t = res->x1.t;
res->x2.regconst = res->x1.regconst;
duk_copy(ctx, res->x1.valstack_idx, res->x2.valstack_idx);
res->x1.t = left->x1.t;
res->x1.regconst = left->x1.regconst;
duk_copy(ctx, left->x1.valstack_idx, res->x1.valstack_idx);
DUK_DDD(DUK_DDDPRINT("binary op, res: t=%ld, x1.t=%ld, x1.regconst=0x%08lx, x2.t=%ld, x2.regconst=0x%08lx",
(long) res->t, (long) res->x1.t, (unsigned long) res->x1.regconst, (long) res->x2.t, (unsigned long) res->x2.regconst));
return;
}
binary_logical:
/*
* Shared handling for logical AND and logical OR.
*
* args = (truthval << 8) + rbp
*
* Truthval determines when to skip right-hand-side.
* For logical AND truthval=1, for logical OR truthval=0.
*
* See doc/compiler.rst for discussion on compiling logical
* AND and OR expressions. The approach here is very simplistic,
* generating extra jumps and multiple evaluations of truth values,
* but generates code on-the-fly with only local back-patching.
*
* Both logical AND and OR are syntactically left-associated.
* However, logical ANDs are compiled as right associative
* expressions, i.e. "A && B && C" as "A && (B && C)", to allow
* skip jumps to skip over the entire tail. Similarly for logical OR.
*/
{
duk_reg_t reg_temp;
duk_int_t pc_jump;
duk_small_uint_t args_truthval = args >> 8;
duk_small_uint_t args_rbp = args & 0xff;
/* XXX: unoptimal use of temps, resetting */
reg_temp = DUK__ALLOCTEMP(comp_ctx);
duk__ivalue_toforcedreg(comp_ctx, left, reg_temp);
duk__emit_a_b(comp_ctx,
DUK_OP_IF | DUK__EMIT_FLAG_NO_SHUFFLE_A,
(duk_regconst_t) args_truthval,
(duk_regconst_t) reg_temp); /* skip jump conditionally */
pc_jump = duk__emit_jump_empty(comp_ctx);
duk__expr_toforcedreg(comp_ctx, res, args_rbp /*rbp_flags*/, reg_temp /*forced_reg*/);
duk__patch_jump_here(comp_ctx, pc_jump);
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_REGCONST;
res->x1.regconst = (duk_regconst_t) reg_temp;
return;
}
assign:
/*
* Shared assignment expression handling
*
* args = (opcode << 8) + rbp
*
* If 'opcode' is DUK_OP_NONE, plain assignment without arithmetic.
* Syntactically valid left-hand-side forms which are not accepted as
* left-hand-side values (e.g. as in "f() = 1") must NOT cause a
* SyntaxError, but rather a run-time ReferenceError.
*
* Assignment expression value is conceptually the LHS/RHS value
* copied into a fresh temporary so that it won't change even if
* LHS/RHS values change (e.g. when they're identifiers). Doing this
* concretely produces inefficient bytecode, so we try to avoid the
* extra temporary for some known-to-be-safe cases. Currently the
* only safe case we detect is a "top level assignment", for example
* "x = y + z;", where the assignment expression value is ignored.
* See: test-dev-assign-expr.js and test-bug-assign-mutate-gh381.js.
*/
{
duk_small_uint_t args_op = args >> 8;
duk_small_uint_t args_rbp = args & 0xff;
duk_bool_t toplevel_assign;
/* XXX: here we need to know if 'left' is left-hand-side compatible.
* That information is no longer available from current expr parsing
* state; it would need to be carried into the 'left' ivalue or by
* some other means.
*/
/* A top-level assignment is e.g. "x = y;". For these it's safe
* to use the RHS as-is as the expression value, even if the RHS
* is a reg-bound identifier. The RHS ('res') is right associative
* so it has consumed all other assignment level operations; the
* only relevant lower binding power construct is comma operator
* which will ignore the expression value provided here.
*/
toplevel_assign = (comp_ctx->curr_func.nud_count == 1 && /* one token before */
comp_ctx->curr_func.led_count == 1); /* one operator (= assign) */
DUK_DDD(DUK_DDDPRINT("assignment: nud_count=%ld, led_count=%ld, toplevel_assign=%ld",
(long) comp_ctx->curr_func.nud_count,
(long) comp_ctx->curr_func.led_count,
(long) toplevel_assign));
if (left->t == DUK_IVAL_VAR) {
duk_hstring *h_varname;
duk_reg_t reg_varbind;
duk_regconst_t rc_varname;
DUK_ASSERT(left->x1.t == DUK_ISPEC_VALUE); /* LHS is already side effect free */
/* Keep the RHS as an unresolved ivalue for now, so it
* can be a plain value or a unary/binary operation here.
* We resolve it before finishing but doing it later allows
* better bytecode in some cases.
*/
duk__expr(comp_ctx, res, args_rbp /*rbp_flags*/);
h_varname = duk_get_hstring(ctx, left->x1.valstack_idx);
DUK_ASSERT(h_varname != NULL);
if (duk__hstring_is_eval_or_arguments_in_strict_mode(comp_ctx, h_varname)) {
/* E5 Section 11.13.1 (and others for other assignments), step 4 */
goto syntax_error_lvalue;
}
duk_dup(ctx, left->x1.valstack_idx);
(void) duk__lookup_lhs(comp_ctx, &reg_varbind, &rc_varname);
if (args_op == DUK_OP_NONE) {
if (toplevel_assign) {
/* Any 'res' will do. */
DUK_DDD(DUK_DDDPRINT("plain assignment, toplevel assign, use as is"));
} else {
/* 'res' must be a plain ivalue, and not register-bound variable. */
DUK_DDD(DUK_DDDPRINT("plain assignment, not toplevel assign, ensure not a reg-bound identifier"));
if (res->t != DUK_IVAL_PLAIN || (res->x1.t == DUK_ISPEC_REGCONST &&
(res->x1.regconst & DUK__CONST_MARKER) == 0 &&
!DUK__ISTEMP(comp_ctx, res->x1.regconst))) {
duk__ivalue_totempconst(comp_ctx, res);
}
}
} else {
duk__ivalue_toregconst(comp_ctx, res);
DUK_ASSERT(res->t == DUK_IVAL_PLAIN && res->x1.t == DUK_ISPEC_REGCONST);
if (reg_varbind >= 0) {
duk_reg_t reg_res;
if (toplevel_assign) {
/* 'reg_varbind' is the operation result and can also
* become the expression value for top level assignments
* such as: "var x; x += y;".
*/
reg_res = reg_varbind;
} else {
/* Not safe to use 'reg_varbind' as assignment expression
* value, so go through a temp.
*/
reg_res = DUK__ALLOCTEMP(comp_ctx);
}
duk__emit_a_b_c(comp_ctx,
args_op,
(duk_regconst_t) reg_res,
(duk_regconst_t) reg_varbind,
res->x1.regconst);
res->x1.regconst = (duk_regconst_t) reg_res;
} else {
/* When LHS is not register bound, always go through a
* temporary. No optimization for top level assignment.
*/
duk_reg_t reg_temp;
reg_temp = DUK__ALLOCTEMP(comp_ctx);
duk__emit_a_bc(comp_ctx,
DUK_OP_GETVAR,
(duk_regconst_t) reg_temp,
rc_varname);
duk__emit_a_b_c(comp_ctx,
args_op,
(duk_regconst_t) reg_temp,
(duk_regconst_t) reg_temp,
res->x1.regconst);
res->x1.regconst = (duk_regconst_t) reg_temp;
}
DUK_ASSERT(res->t == DUK_IVAL_PLAIN && res->x1.t == DUK_ISPEC_REGCONST);
}
/* At this point 'res' holds the potential expression value.
* It can be basically any ivalue here, including a reg-bound
* identifier (if code above deems it safe) or a unary/binary
* operation. Operations must be resolved to a side effect free
* plain value, and the side effects must happen exactly once.
*/
if (reg_varbind >= 0) {
if (res->t != DUK_IVAL_PLAIN) {
/* Resolve 'res' directly into the LHS binding, and use
* that as the expression value if safe. If not safe,
* resolve to a temp/const and copy to LHS.
*/
if (toplevel_assign) {
duk__ivalue_toforcedreg(comp_ctx, res, (duk_int_t) reg_varbind);
} else {
duk__ivalue_totempconst(comp_ctx, res);
duk__copy_ivalue(comp_ctx, res, left); /* use 'left' as a temp */
duk__ivalue_toforcedreg(comp_ctx, left, (duk_int_t) reg_varbind);
}
} else {
/* Use 'res' as the expression value (it's side effect
* free and may be a plain value, a register, or a
* constant) and write it to the LHS binding too.
*/
duk__copy_ivalue(comp_ctx, res, left); /* use 'left' as a temp */
duk__ivalue_toforcedreg(comp_ctx, left, (duk_int_t) reg_varbind);
}
} else {
/* Only a reg fits into 'A' so coerce 'res' into a register
* for PUTVAR.
*
* XXX: here the current A/B/C split is suboptimal: we could
* just use 9 bits for reg_res (and support constants) and 17
* instead of 18 bits for the varname const index.
*/
duk__ivalue_toreg(comp_ctx, res);
duk__emit_a_bc(comp_ctx,
DUK_OP_PUTVAR | DUK__EMIT_FLAG_A_IS_SOURCE,
res->x1.regconst,
rc_varname);
}
/* 'res' contains expression value */
} else if (left->t == DUK_IVAL_PROP) {
/* E5 Section 11.13.1 (and others) step 4 never matches for prop writes -> no check */
duk_reg_t reg_obj;
duk_regconst_t rc_key;
duk_regconst_t rc_res;
duk_reg_t reg_temp;
/* Property access expressions ('a[b]') are critical to correct
* LHS evaluation ordering, see test-dev-assign-eval-order*.js.
* We must make sure that the LHS target slot (base object and
* key) don't change during RHS evaluation. The only concrete
* problem is a register reference to a variable-bound register
* (i.e., non-temp). Require temp regs for both key and base.
*
* Don't allow a constant for the object (even for a number
* etc), as it goes into the 'A' field of the opcode.
*/
reg_obj = duk__ispec_toregconst_raw(comp_ctx,
&left->x1,
-1 /*forced_reg*/,
DUK__IVAL_FLAG_REQUIRE_TEMP /*flags*/);
rc_key = duk__ispec_toregconst_raw(comp_ctx,
&left->x2,
-1 /*forced_reg*/,
DUK__IVAL_FLAG_REQUIRE_TEMP | DUK__IVAL_FLAG_ALLOW_CONST /*flags*/);
/* Evaluate RHS only when LHS is safe. */
duk__expr_toregconst(comp_ctx, res, args_rbp /*rbp_flags*/);
DUK_ASSERT(res->t == DUK_IVAL_PLAIN && res->x1.t == DUK_ISPEC_REGCONST);
if (args_op == DUK_OP_NONE) {
rc_res = res->x1.regconst;
} else {
reg_temp = DUK__ALLOCTEMP(comp_ctx);
duk__emit_a_b_c(comp_ctx,
DUK_OP_GETPROP,
(duk_regconst_t) reg_temp,
(duk_regconst_t) reg_obj,
rc_key);
duk__emit_a_b_c(comp_ctx,
args_op,
(duk_regconst_t) reg_temp,
(duk_regconst_t) reg_temp,
res->x1.regconst);
rc_res = (duk_regconst_t) reg_temp;
}
duk__emit_a_b_c(comp_ctx,
DUK_OP_PUTPROP | DUK__EMIT_FLAG_A_IS_SOURCE,
(duk_regconst_t) reg_obj,
rc_key,
rc_res);
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_REGCONST;
res->x1.regconst = rc_res;
} else {
/* No support for lvalues returned from new or function call expressions.
* However, these must NOT cause compile-time SyntaxErrors, but run-time
* ReferenceErrors. Both left and right sides of the assignment must be
* evaluated before throwing a ReferenceError. For instance:
*
* f() = g();
*
* must result in f() being evaluated, then g() being evaluated, and
* finally, a ReferenceError being thrown. See E5 Section 11.13.1.
*/
duk_regconst_t rc_res;
/* first evaluate LHS fully to ensure all side effects are out */
duk__ivalue_toplain_ignore(comp_ctx, left);
/* then evaluate RHS fully (its value becomes the expression value too) */
rc_res = duk__expr_toregconst(comp_ctx, res, args_rbp /*rbp_flags*/);
duk__emit_extraop_only(comp_ctx,
DUK_EXTRAOP_INVLHS);
/* XXX: this value is irrelevant because of INVLHS? */
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_REGCONST;
res->x1.regconst = rc_res;
}
return;
}
postincdec:
{
/*
* Post-increment/decrement will return the original value as its
* result value. However, even that value will be coerced using
* ToNumber() which is quite awkward. Specific bytecode opcodes
* are used to handle these semantics.
*
* Note that post increment/decrement has a "no LineTerminator here"
* restriction. This is handled by duk__expr_lbp(), which forcibly terminates
* the previous expression if a LineTerminator occurs before '++'/'--'.
*/
duk_reg_t reg_res;
duk_small_uint_t args_op = args >> 8;
/* Specific assumptions for opcode numbering. */
DUK_ASSERT(DUK_OP_POSTINCR + 4 == DUK_OP_POSTINCV);
DUK_ASSERT(DUK_OP_POSTDECR + 4 == DUK_OP_POSTDECV);
DUK_ASSERT(DUK_OP_POSTINCR + 8 == DUK_OP_POSTINCP);
DUK_ASSERT(DUK_OP_POSTDECR + 8 == DUK_OP_POSTDECP);
reg_res = DUK__ALLOCTEMP(comp_ctx);
if (left->t == DUK_IVAL_VAR) {
duk_hstring *h_varname;
duk_reg_t reg_varbind;
duk_regconst_t rc_varname;
h_varname = duk_get_hstring(ctx, left->x1.valstack_idx);
DUK_ASSERT(h_varname != NULL);
if (duk__hstring_is_eval_or_arguments_in_strict_mode(comp_ctx, h_varname)) {
goto syntax_error;
}
duk_dup(ctx, left->x1.valstack_idx);
if (duk__lookup_lhs(comp_ctx, &reg_varbind, &rc_varname)) {
duk__emit_a_bc(comp_ctx,
args_op, /* e.g. DUK_OP_POSTINCR */
(duk_regconst_t) reg_res,
(duk_regconst_t) reg_varbind);
} else {
duk__emit_a_bc(comp_ctx,
args_op + 4, /* e.g. DUK_OP_POSTINCV */
(duk_regconst_t) reg_res,
rc_varname);
}
DUK_DDD(DUK_DDDPRINT("postincdec to '%!O' -> reg_varbind=%ld, rc_varname=%ld",
(duk_heaphdr *) h_varname, (long) reg_varbind, (long) rc_varname));
} else if (left->t == DUK_IVAL_PROP) {
duk_reg_t reg_obj; /* allocate to reg only (not const) */
duk_regconst_t rc_key;
reg_obj = duk__ispec_toregconst_raw(comp_ctx, &left->x1, -1 /*forced_reg*/, 0 /*flags*/); /* don't allow const */
rc_key = duk__ispec_toregconst_raw(comp_ctx, &left->x2, -1 /*forced_reg*/, DUK__IVAL_FLAG_ALLOW_CONST /*flags*/);
duk__emit_a_b_c(comp_ctx,
args_op + 8, /* e.g. DUK_OP_POSTINCP */
(duk_regconst_t) reg_res,
(duk_regconst_t) reg_obj,
rc_key);
} else {
/* Technically return value is not needed because INVLHS will
* unconditially throw a ReferenceError. Coercion is necessary
* for proper semantics (consider ToNumber() called for an object).
* Use DUK_EXTRAOP_UNP with a dummy register to get ToNumber().
*/
duk__ivalue_toforcedreg(comp_ctx, left, reg_res);
duk__emit_extraop_bc(comp_ctx,
DUK_EXTRAOP_UNP,
reg_res); /* for side effects, result ignored */
duk__emit_extraop_only(comp_ctx,
DUK_EXTRAOP_INVLHS);
}
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_REGCONST;
res->x1.regconst = (duk_regconst_t) reg_res;
DUK__SETTEMP(comp_ctx, reg_res + 1);
return;
}
syntax_error:
DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_EXPRESSION);
return;
syntax_error_lvalue:
DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_LVALUE);
return;
}
DUK_LOCAL duk_small_uint_t duk__expr_lbp(duk_compiler_ctx *comp_ctx) {
duk_small_int_t tok = comp_ctx->curr_token.t;
DUK_ASSERT(tok >= DUK_TOK_MINVAL && tok <= DUK_TOK_MAXVAL);
DUK_ASSERT(sizeof(duk__token_lbp) == DUK_TOK_MAXVAL + 1);
/* XXX: integrate support for this into led() instead?
* Similar issue as post-increment/post-decrement.
*/
/* prevent duk__expr_led() by using a binding power less than anything valid */
if (tok == DUK_TOK_IN && !comp_ctx->curr_func.allow_in) {
return 0;
}
if ((tok == DUK_TOK_DECREMENT || tok == DUK_TOK_INCREMENT) &&
(comp_ctx->curr_token.lineterm)) {
/* '++' or '--' in a post-increment/decrement position,
* and a LineTerminator occurs between the operator and
* the preceding expression. Force the previous expr
* to terminate, in effect treating e.g. "a,b\n++" as
* "a,b;++" (= SyntaxError).
*/
return 0;
}
return DUK__TOKEN_LBP_GET_BP(duk__token_lbp[tok]); /* format is bit packed */
}
/*
* Expression parsing.
*
* Upon entry to 'expr' and its variants, 'curr_tok' is assumed to be the
* first token of the expression. Upon exit, 'curr_tok' will be the first
* token not part of the expression (e.g. semicolon terminating an expression
* statement).
*/
#define DUK__EXPR_RBP_MASK 0xff
#define DUK__EXPR_FLAG_REJECT_IN (1 << 8) /* reject 'in' token (used for for-in) */
#define DUK__EXPR_FLAG_ALLOW_EMPTY (1 << 9) /* allow empty expression */
#define DUK__EXPR_FLAG_REQUIRE_INIT (1 << 10) /* require initializer for var/const */
/* main expression parser function */
DUK_LOCAL void duk__expr(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_ivalue tmp_alloc; /* 'res' is used for "left", and 'tmp' for "right" */
duk_ivalue *tmp = &tmp_alloc;
duk_small_uint_t rbp;
DUK__RECURSION_INCREASE(comp_ctx, thr);
duk_require_stack(ctx, DUK__PARSE_EXPR_SLOTS);
/* filter out flags from exprtop rbp_flags here to save space */
rbp = rbp_flags & DUK__EXPR_RBP_MASK;
DUK_DDD(DUK_DDDPRINT("duk__expr(), rbp_flags=%ld, rbp=%ld, allow_in=%ld, paren_level=%ld",
(long) rbp_flags, (long) rbp, (long) comp_ctx->curr_func.allow_in,
(long) comp_ctx->curr_func.paren_level));
DUK_MEMZERO(&tmp_alloc, sizeof(tmp_alloc));
tmp->x1.valstack_idx = duk_get_top(ctx);
tmp->x2.valstack_idx = tmp->x1.valstack_idx + 1;
duk_push_undefined(ctx);
duk_push_undefined(ctx);
/* XXX: where to release temp regs in intermediate expressions?
* e.g. 1+2+3 -> don't inflate temp register count when parsing this.
* that particular expression temp regs can be forced here.
*/
/* XXX: increase ctx->expr_tokens here for every consumed token
* (this would be a nice statistic)?
*/
if (comp_ctx->curr_token.t == DUK_TOK_SEMICOLON || comp_ctx->curr_token.t == DUK_TOK_RPAREN) {
/* XXX: possibly incorrect handling of empty expression */
DUK_DDD(DUK_DDDPRINT("empty expression"));
if (!(rbp_flags & DUK__EXPR_FLAG_ALLOW_EMPTY)) {
DUK_ERROR_SYNTAX(thr, DUK_STR_EMPTY_EXPR_NOT_ALLOWED);
}
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_VALUE;
duk_push_undefined(ctx);
duk_replace(ctx, res->x1.valstack_idx);
goto cleanup;
}
duk__advance(comp_ctx);
duk__expr_nud(comp_ctx, res); /* reuse 'res' as 'left' */
while (rbp < duk__expr_lbp(comp_ctx)) {
duk__advance(comp_ctx);
duk__expr_led(comp_ctx, res, tmp);
duk__copy_ivalue(comp_ctx, tmp, res); /* tmp -> res */
}
cleanup:
/* final result is already in 'res' */
duk_pop_2(ctx);
DUK__RECURSION_DECREASE(comp_ctx, thr);
}
DUK_LOCAL void duk__exprtop(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) {
duk_hthread *thr = comp_ctx->thr;
/* Note: these variables must reside in 'curr_func' instead of the global
* context: when parsing function expressions, expression parsing is nested.
*/
comp_ctx->curr_func.nud_count = 0;
comp_ctx->curr_func.led_count = 0;
comp_ctx->curr_func.paren_level = 0;
comp_ctx->curr_func.expr_lhs = 1;
comp_ctx->curr_func.allow_in = (rbp_flags & DUK__EXPR_FLAG_REJECT_IN ? 0 : 1);
duk__expr(comp_ctx, res, rbp_flags);
if (!(rbp_flags & DUK__EXPR_FLAG_ALLOW_EMPTY) && duk__expr_is_empty(comp_ctx)) {
DUK_ERROR_SYNTAX(thr, DUK_STR_EMPTY_EXPR_NOT_ALLOWED);
}
}
/* A bunch of helpers (for size optimization) that combine duk__expr()/duk__exprtop()
* and result conversions.
*
* Each helper needs at least 2-3 calls to make it worth while to wrap.
*/
#if 0 /* unused */
DUK_LOCAL duk_reg_t duk__expr_toreg(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) {
duk__expr(comp_ctx, res, rbp_flags);
return duk__ivalue_toreg(comp_ctx, res);
}
#endif
#if 0 /* unused */
DUK_LOCAL duk_reg_t duk__expr_totemp(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) {
duk__expr(comp_ctx, res, rbp_flags);
return duk__ivalue_totemp(comp_ctx, res);
}
#endif
DUK_LOCAL void duk__expr_toforcedreg(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags, duk_reg_t forced_reg) {
DUK_ASSERT(forced_reg >= 0);
duk__expr(comp_ctx, res, rbp_flags);
duk__ivalue_toforcedreg(comp_ctx, res, forced_reg);
}
DUK_LOCAL duk_regconst_t duk__expr_toregconst(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) {
duk__expr(comp_ctx, res, rbp_flags);
return duk__ivalue_toregconst(comp_ctx, res);
}
#if 0 /* unused */
DUK_LOCAL duk_regconst_t duk__expr_totempconst(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) {
duk__expr(comp_ctx, res, rbp_flags);
return duk__ivalue_totempconst(comp_ctx, res);
}
#endif
DUK_LOCAL void duk__expr_toplain(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) {
duk__expr(comp_ctx, res, rbp_flags);
duk__ivalue_toplain(comp_ctx, res);
}
DUK_LOCAL void duk__expr_toplain_ignore(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) {
duk__expr(comp_ctx, res, rbp_flags);
duk__ivalue_toplain_ignore(comp_ctx, res);
}
DUK_LOCAL duk_reg_t duk__exprtop_toreg(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) {
duk__exprtop(comp_ctx, res, rbp_flags);
return duk__ivalue_toreg(comp_ctx, res);
}
#if 0 /* unused */
DUK_LOCAL duk_reg_t duk__exprtop_totemp(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) {
duk__exprtop(comp_ctx, res, rbp_flags);
return duk__ivalue_totemp(comp_ctx, res);
}
#endif
DUK_LOCAL void duk__exprtop_toforcedreg(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags, duk_reg_t forced_reg) {
DUK_ASSERT(forced_reg >= 0);
duk__exprtop(comp_ctx, res, rbp_flags);
duk__ivalue_toforcedreg(comp_ctx, res, forced_reg);
}
DUK_LOCAL duk_regconst_t duk__exprtop_toregconst(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t rbp_flags) {
duk__exprtop(comp_ctx, res, rbp_flags);
return duk__ivalue_toregconst(comp_ctx, res);
}
#if 0 /* unused */
DUK_LOCAL void duk__exprtop_toplain_ignore(duk_compiler_ctx *comp_ctx, duk_ivalue *res, int rbp_flags) {
duk__exprtop(comp_ctx, res, rbp_flags);
duk__ivalue_toplain_ignore(comp_ctx, res);
}
#endif
/*
* Parse an individual source element (top level statement) or a statement.
*
* Handles labeled statements automatically (peeling away labels before
* parsing an expression that follows the label(s)).
*
* Upon entry, 'curr_tok' contains the first token of the statement (parsed
* in "allow regexp literal" mode). Upon exit, 'curr_tok' contains the first
* token following the statement (if the statement has a terminator, this is
* the token after the terminator).
*/
#ifdef DUK__HAS_VAL
#undef DUK__HAS_VAL
#endif
#ifdef DUK__HAS_TERM
#undef DUK__HAS_TERM
#endif
#ifdef DUK__ALLOW_AUTO_SEMI_ALWAYS
#undef DUK__ALLOW_AUTO_SEMI_ALWAYS
#endif
#ifdef DUK__STILL_PROLOGUE
#undef DUK__STILL_PROLOGUE
#endif
#ifdef DUK__IS_TERMINAL
#undef DUK__IS_TERMINAL
#endif
#define DUK__HAS_VAL (1 << 0) /* stmt has non-empty value */
#define DUK__HAS_TERM (1 << 1) /* stmt has explicit/implicit semicolon terminator */
#define DUK__ALLOW_AUTO_SEMI_ALWAYS (1 << 2) /* allow automatic semicolon even without lineterm (compatibility) */
#define DUK__STILL_PROLOGUE (1 << 3) /* statement does not terminate directive prologue */
#define DUK__IS_TERMINAL (1 << 4) /* statement is guaranteed to be terminal (control doesn't flow to next statement) */
/* Parse a single variable declaration (e.g. "i" or "i=10"). A leading 'var'
* has already been eaten. These is no return value in 'res', it is used only
* as a temporary.
*
* When called from 'for-in' statement parser, the initializer expression must
* not allow the 'in' token. The caller supply additional expression parsing
* flags (like DUK__EXPR_FLAG_REJECT_IN) in 'expr_flags'.
*
* Finally, out_rc_varname and out_reg_varbind are updated to reflect where
* the identifier is bound:
*
* If register bound: out_reg_varbind >= 0, out_rc_varname == 0 (ignore)
* If not register bound: out_reg_varbind < 0, out_rc_varname >= 0
*
* These allow the caller to use the variable for further assignment, e.g.
* as is done in 'for-in' parsing.
*/
DUK_LOCAL void duk__parse_var_decl(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t expr_flags, duk_reg_t *out_reg_varbind, duk_regconst_t *out_rc_varname) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_hstring *h_varname;
duk_reg_t reg_varbind;
duk_regconst_t rc_varname;
/* assume 'var' has been eaten */
/* Note: Identifier rejects reserved words */
if (comp_ctx->curr_token.t != DUK_TOK_IDENTIFIER) {
goto syntax_error;
}
h_varname = comp_ctx->curr_token.str1;
DUK_ASSERT(h_varname != NULL);
/* strict mode restrictions (E5 Section 12.2.1) */
if (duk__hstring_is_eval_or_arguments_in_strict_mode(comp_ctx, h_varname)) {
goto syntax_error;
}
/* register declarations in first pass */
if (comp_ctx->curr_func.in_scanning) {
duk_uarridx_t n;
DUK_DDD(DUK_DDDPRINT("register variable declaration %!O in pass 1",
(duk_heaphdr *) h_varname));
n = (duk_uarridx_t) duk_get_length(ctx, comp_ctx->curr_func.decls_idx);
duk_push_hstring(ctx, h_varname);
duk_put_prop_index(ctx, comp_ctx->curr_func.decls_idx, n);
duk_push_int(ctx, DUK_DECL_TYPE_VAR + (0 << 8));
duk_put_prop_index(ctx, comp_ctx->curr_func.decls_idx, n + 1);
}
duk_push_hstring(ctx, h_varname); /* push before advancing to keep reachable */
/* register binding lookup is based on varmap (even in first pass) */
duk_dup_top(ctx);
(void) duk__lookup_lhs(comp_ctx, &reg_varbind, &rc_varname);
duk__advance(comp_ctx); /* eat identifier */
if (comp_ctx->curr_token.t == DUK_TOK_EQUALSIGN) {
duk__advance(comp_ctx);
DUK_DDD(DUK_DDDPRINT("vardecl, assign to '%!O' -> reg_varbind=%ld, rc_varname=%ld",
(duk_heaphdr *) h_varname, (long) reg_varbind, (long) rc_varname));
duk__exprtop(comp_ctx, res, DUK__BP_COMMA | expr_flags /*rbp_flags*/); /* AssignmentExpression */
if (reg_varbind >= 0) {
duk__ivalue_toforcedreg(comp_ctx, res, reg_varbind);
} else {
duk_reg_t reg_val;
reg_val = duk__ivalue_toreg(comp_ctx, res);
duk__emit_a_bc(comp_ctx,
DUK_OP_PUTVAR | DUK__EMIT_FLAG_A_IS_SOURCE,
(duk_regconst_t) reg_val,
rc_varname);
}
} else {
if (expr_flags & DUK__EXPR_FLAG_REQUIRE_INIT) {
/* Used for minimal 'const': initializer required. */
goto syntax_error;
}
}
duk_pop(ctx); /* pop varname */
*out_rc_varname = rc_varname;
*out_reg_varbind = reg_varbind;
return;
syntax_error:
DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_VAR_DECLARATION);
}
DUK_LOCAL void duk__parse_var_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_small_uint_t expr_flags) {
duk_reg_t reg_varbind;
duk_regconst_t rc_varname;
duk__advance(comp_ctx); /* eat 'var' */
for (;;) {
/* rc_varname and reg_varbind are ignored here */
duk__parse_var_decl(comp_ctx, res, 0 | expr_flags, &reg_varbind, &rc_varname);
if (comp_ctx->curr_token.t != DUK_TOK_COMMA) {
break;
}
duk__advance(comp_ctx);
}
}
DUK_LOCAL void duk__parse_for_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_int_t pc_label_site) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_int_t pc_v34_lhs; /* start variant 3/4 left-hand-side code (L1 in doc/compiler.rst example) */
duk_reg_t temp_reset; /* knock back "next temp" to this whenever possible */
duk_reg_t reg_temps; /* preallocated temporaries (2) for variants 3 and 4 */
DUK_DDD(DUK_DDDPRINT("start parsing a for/for-in statement"));
/* Two temporaries are preallocated here for variants 3 and 4 which need
* registers which are never clobbered by expressions in the loop
* (concretely: for the enumerator object and the next enumerated value).
* Variants 1 and 2 "release" these temps.
*/
reg_temps = DUK__ALLOCTEMPS(comp_ctx, 2);
temp_reset = DUK__GETTEMP(comp_ctx);
/*
* For/for-in main variants are:
*
* 1. for (ExpressionNoIn_opt; Expression_opt; Expression_opt) Statement
* 2. for (var VariableDeclarationNoIn; Expression_opt; Expression_opt) Statement
* 3. for (LeftHandSideExpression in Expression) Statement
* 4. for (var VariableDeclarationNoIn in Expression) Statement
*
* Parsing these without arbitrary lookahead or backtracking is relatively
* tricky but we manage to do so for now.
*
* See doc/compiler.rst for a detailed discussion of control flow
* issues, evaluation order issues, etc.
*/
duk__advance(comp_ctx); /* eat 'for' */
duk__advance_expect(comp_ctx, DUK_TOK_LPAREN);
DUK_DDD(DUK_DDDPRINT("detecting for/for-in loop variant, pc=%ld", (long) duk__get_current_pc(comp_ctx)));
/* a label site has been emitted by duk__parse_stmt() automatically
* (it will also emit the ENDLABEL).
*/
if (comp_ctx->curr_token.t == DUK_TOK_VAR) {
/*
* Variant 2 or 4
*/
duk_reg_t reg_varbind; /* variable binding register if register-bound (otherwise < 0) */
duk_regconst_t rc_varname; /* variable name reg/const, if variable not register-bound */
duk__advance(comp_ctx); /* eat 'var' */
duk__parse_var_decl(comp_ctx, res, DUK__EXPR_FLAG_REJECT_IN, &reg_varbind, &rc_varname);
DUK__SETTEMP(comp_ctx, temp_reset);
if (comp_ctx->curr_token.t == DUK_TOK_IN) {
/*
* Variant 4
*/
DUK_DDD(DUK_DDDPRINT("detected for variant 4: for (var VariableDeclarationNoIn in Expression) Statement"));
pc_v34_lhs = duk__get_current_pc(comp_ctx); /* jump is inserted here */
if (reg_varbind >= 0) {
duk__emit_a_bc(comp_ctx,
DUK_OP_LDREG,
(duk_regconst_t) reg_varbind,
(duk_regconst_t) (reg_temps + 0));
} else {
duk__emit_a_bc(comp_ctx,
DUK_OP_PUTVAR | DUK__EMIT_FLAG_A_IS_SOURCE,
(duk_regconst_t) (reg_temps + 0),
rc_varname);
}
goto parse_3_or_4;
} else {
/*
* Variant 2
*/
DUK_DDD(DUK_DDDPRINT("detected for variant 2: for (var VariableDeclarationNoIn; Expression_opt; Expression_opt) Statement"));
for (;;) {
/* more initializers */
if (comp_ctx->curr_token.t != DUK_TOK_COMMA) {
break;
}
DUK_DDD(DUK_DDDPRINT("variant 2 has another variable initializer"));
duk__advance(comp_ctx); /* eat comma */
duk__parse_var_decl(comp_ctx, res, DUK__EXPR_FLAG_REJECT_IN, &reg_varbind, &rc_varname);
}
goto parse_1_or_2;
}
} else {
/*
* Variant 1 or 3
*/
pc_v34_lhs = duk__get_current_pc(comp_ctx); /* jump is inserted here (variant 3) */
/* Note that duk__exprtop() here can clobber any reg above current temp_next,
* so any loop variables (e.g. enumerator) must be "preallocated".
*/
/* don't coerce yet to a plain value (variant 3 needs special handling) */
duk__exprtop(comp_ctx, res, DUK__BP_FOR_EXPR | DUK__EXPR_FLAG_REJECT_IN | DUK__EXPR_FLAG_ALLOW_EMPTY /*rbp_flags*/); /* Expression */
if (comp_ctx->curr_token.t == DUK_TOK_IN) {
/*
* Variant 3
*/
/* XXX: need to determine LHS type, and check that it is LHS compatible */
DUK_DDD(DUK_DDDPRINT("detected for variant 3: for (LeftHandSideExpression in Expression) Statement"));
if (duk__expr_is_empty(comp_ctx)) {
goto syntax_error; /* LeftHandSideExpression does not allow empty expression */
}
if (res->t == DUK_IVAL_VAR) {
duk_reg_t reg_varbind;
duk_regconst_t rc_varname;
duk_dup(ctx, res->x1.valstack_idx);
if (duk__lookup_lhs(comp_ctx, &reg_varbind, &rc_varname)) {
duk__emit_a_bc(comp_ctx,
DUK_OP_LDREG,
(duk_regconst_t) reg_varbind,
(duk_regconst_t) (reg_temps + 0));
} else {
duk__emit_a_bc(comp_ctx,
DUK_OP_PUTVAR | DUK__EMIT_FLAG_A_IS_SOURCE,
(duk_regconst_t) (reg_temps + 0),
rc_varname);
}
} else if (res->t == DUK_IVAL_PROP) {
/* Don't allow a constant for the object (even for a number etc), as
* it goes into the 'A' field of the opcode.
*/
duk_reg_t reg_obj;
duk_regconst_t rc_key;
reg_obj = duk__ispec_toregconst_raw(comp_ctx, &res->x1, -1 /*forced_reg*/, 0 /*flags*/); /* don't allow const */
rc_key = duk__ispec_toregconst_raw(comp_ctx, &res->x2, -1 /*forced_reg*/, DUK__IVAL_FLAG_ALLOW_CONST /*flags*/);
duk__emit_a_b_c(comp_ctx,
DUK_OP_PUTPROP | DUK__EMIT_FLAG_A_IS_SOURCE,
(duk_regconst_t) reg_obj,
rc_key,
(duk_regconst_t) (reg_temps + 0));
} else {
duk__ivalue_toplain_ignore(comp_ctx, res); /* just in case */
duk__emit_extraop_only(comp_ctx,
DUK_EXTRAOP_INVLHS);
}
goto parse_3_or_4;
} else {
/*
* Variant 1
*/
DUK_DDD(DUK_DDDPRINT("detected for variant 1: for (ExpressionNoIn_opt; Expression_opt; Expression_opt) Statement"));
duk__ivalue_toplain_ignore(comp_ctx, res);
goto parse_1_or_2;
}
}
parse_1_or_2:
/*
* Parse variant 1 or 2. The first part expression (which differs
* in the variants) has already been parsed and its code emitted.
*
* reg_temps + 0: unused
* reg_temps + 1: unused
*/
{
duk_regconst_t rc_cond;
duk_int_t pc_l1, pc_l2, pc_l3, pc_l4;
duk_int_t pc_jumpto_l3, pc_jumpto_l4;
duk_bool_t expr_c_empty;
DUK_DDD(DUK_DDDPRINT("shared code for parsing variants 1 and 2"));
/* "release" preallocated temps since we won't need them */
temp_reset = reg_temps + 0;
DUK__SETTEMP(comp_ctx, temp_reset);
duk__advance_expect(comp_ctx, DUK_TOK_SEMICOLON);
pc_l1 = duk__get_current_pc(comp_ctx);
duk__exprtop(comp_ctx, res, DUK__BP_FOR_EXPR | DUK__EXPR_FLAG_ALLOW_EMPTY /*rbp_flags*/); /* Expression_opt */
if (duk__expr_is_empty(comp_ctx)) {
/* no need to coerce */
pc_jumpto_l3 = duk__emit_jump_empty(comp_ctx); /* to body */
pc_jumpto_l4 = -1; /* omitted */
} else {
rc_cond = duk__ivalue_toregconst(comp_ctx, res);
duk__emit_if_false_skip(comp_ctx, rc_cond);
pc_jumpto_l3 = duk__emit_jump_empty(comp_ctx); /* to body */
pc_jumpto_l4 = duk__emit_jump_empty(comp_ctx); /* to exit */
}
DUK__SETTEMP(comp_ctx, temp_reset);
duk__advance_expect(comp_ctx, DUK_TOK_SEMICOLON);
pc_l2 = duk__get_current_pc(comp_ctx);
duk__exprtop(comp_ctx, res, DUK__BP_FOR_EXPR | DUK__EXPR_FLAG_ALLOW_EMPTY /*rbp_flags*/); /* Expression_opt */
if (duk__expr_is_empty(comp_ctx)) {
/* no need to coerce */
expr_c_empty = 1;
/* JUMP L1 omitted */
} else {
duk__ivalue_toplain_ignore(comp_ctx, res);
expr_c_empty = 0;
duk__emit_jump(comp_ctx, pc_l1);
}
DUK__SETTEMP(comp_ctx, temp_reset);
duk__advance_expect(comp_ctx, DUK_TOK_RPAREN);
pc_l3 = duk__get_current_pc(comp_ctx);
duk__parse_stmt(comp_ctx, res, 0 /*allow_source_elem*/);
if (expr_c_empty) {
duk__emit_jump(comp_ctx, pc_l1);
} else {
duk__emit_jump(comp_ctx, pc_l2);
}
/* temp reset is not necessary after duk__parse_stmt(), which already does it */
pc_l4 = duk__get_current_pc(comp_ctx);
DUK_DDD(DUK_DDDPRINT("patching jumps: jumpto_l3: %ld->%ld, jumpto_l4: %ld->%ld, "
"break: %ld->%ld, continue: %ld->%ld",
(long) pc_jumpto_l3, (long) pc_l3, (long) pc_jumpto_l4, (long) pc_l4,
(long) (pc_label_site + 1), (long) pc_l4, (long) (pc_label_site + 2), (long) pc_l2));
duk__patch_jump(comp_ctx, pc_jumpto_l3, pc_l3);
duk__patch_jump(comp_ctx, pc_jumpto_l4, pc_l4);
duk__patch_jump(comp_ctx,
pc_label_site + 1,
pc_l4); /* break jump */
duk__patch_jump(comp_ctx,
pc_label_site + 2,
expr_c_empty ? pc_l1 : pc_l2); /* continue jump */
}
goto finished;
parse_3_or_4:
/*
* Parse variant 3 or 4.
*
* For variant 3 (e.g. "for (A in C) D;") the code for A (except the
* final property/variable write) has already been emitted. The first
* instruction of that code is at pc_v34_lhs; a JUMP needs to be inserted
* there to satisfy control flow needs.
*
* For variant 4, if the variable declaration had an initializer
* (e.g. "for (var A = B in C) D;") the code for the assignment
* (B) has already been emitted.
*
* Variables set before entering here:
*
* pc_v34_lhs: insert a "JUMP L2" here (see doc/compiler.rst example).
* reg_temps + 0: iteration target value (written to LHS)
* reg_temps + 1: enumerator object
*/
{
duk_int_t pc_l1, pc_l2, pc_l3, pc_l4, pc_l5;
duk_int_t pc_jumpto_l2, pc_jumpto_l3, pc_jumpto_l4, pc_jumpto_l5;
duk_reg_t reg_target;
DUK_DDD(DUK_DDDPRINT("shared code for parsing variants 3 and 4, pc_v34_lhs=%ld", (long) pc_v34_lhs));
DUK__SETTEMP(comp_ctx, temp_reset);
/* First we need to insert a jump in the middle of previously
* emitted code to get the control flow right. No jumps can
* cross the position where the jump is inserted. See doc/compiler.rst
* for discussion on the intricacies of control flow and side effects
* for variants 3 and 4.
*/
duk__insert_jump_entry(comp_ctx, pc_v34_lhs);
pc_jumpto_l2 = pc_v34_lhs; /* inserted jump */
pc_l1 = pc_v34_lhs + 1; /* +1, right after inserted jump */
/* The code for writing reg_temps + 0 to the left hand side has already
* been emitted.
*/
pc_jumpto_l3 = duk__emit_jump_empty(comp_ctx); /* -> loop body */
duk__advance(comp_ctx); /* eat 'in' */
/* Parse enumeration target and initialize enumerator. For 'null' and 'undefined',
* INITENUM will creates a 'null' enumerator which works like an empty enumerator
* (E5 Section 12.6.4, step 3). Note that INITENUM requires the value to be in a
* register (constant not allowed).
*/
pc_l2 = duk__get_current_pc(comp_ctx);
reg_target = duk__exprtop_toreg(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/); /* Expression */
duk__emit_extraop_b_c(comp_ctx,
DUK_EXTRAOP_INITENUM | DUK__EMIT_FLAG_B_IS_TARGET,
(duk_regconst_t) (reg_temps + 1),
(duk_regconst_t) reg_target);
pc_jumpto_l4 = duk__emit_jump_empty(comp_ctx);
DUK__SETTEMP(comp_ctx, temp_reset);
duk__advance_expect(comp_ctx, DUK_TOK_RPAREN);
pc_l3 = duk__get_current_pc(comp_ctx);
duk__parse_stmt(comp_ctx, res, 0 /*allow_source_elem*/);
/* temp reset is not necessary after duk__parse_stmt(), which already does it */
/* NEXTENUM needs a jump slot right after the main opcode.
* We need the code emitter to reserve the slot: if there's
* target shuffling, the target shuffle opcodes must happen
* after the jump slot (for NEXTENUM the shuffle opcodes are
* not needed if the enum is finished).
*/
pc_l4 = duk__get_current_pc(comp_ctx);
duk__emit_extraop_b_c(comp_ctx,
DUK_EXTRAOP_NEXTENUM | DUK__EMIT_FLAG_B_IS_TARGET | DUK__EMIT_FLAG_RESERVE_JUMPSLOT,
(duk_regconst_t) (reg_temps + 0),
(duk_regconst_t) (reg_temps + 1));
pc_jumpto_l5 = comp_ctx->emit_jumpslot_pc; /* NEXTENUM jump slot: executed when enum finished */
duk__emit_jump(comp_ctx, pc_l1); /* jump to next loop, using reg_v34_iter as iterated value */
pc_l5 = duk__get_current_pc(comp_ctx);
/* XXX: since the enumerator may be a memory expensive object,
* perhaps clear it explicitly here? If so, break jump must
* go through this clearing operation.
*/
DUK_DDD(DUK_DDDPRINT("patching jumps: jumpto_l2: %ld->%ld, jumpto_l3: %ld->%ld, "
"jumpto_l4: %ld->%ld, jumpto_l5: %ld->%ld, "
"break: %ld->%ld, continue: %ld->%ld",
(long) pc_jumpto_l2, (long) pc_l2, (long) pc_jumpto_l3, (long) pc_l3,
(long) pc_jumpto_l4, (long) pc_l4, (long) pc_jumpto_l5, (long) pc_l5,
(long) (pc_label_site + 1), (long) pc_l5, (long) (pc_label_site + 2), (long) pc_l4));
duk__patch_jump(comp_ctx, pc_jumpto_l2, pc_l2);
duk__patch_jump(comp_ctx, pc_jumpto_l3, pc_l3);
duk__patch_jump(comp_ctx, pc_jumpto_l4, pc_l4);
duk__patch_jump(comp_ctx, pc_jumpto_l5, pc_l5);
duk__patch_jump(comp_ctx, pc_label_site + 1, pc_l5); /* break jump */
duk__patch_jump(comp_ctx, pc_label_site + 2, pc_l4); /* continue jump */
}
goto finished;
finished:
DUK_DDD(DUK_DDDPRINT("end parsing a for/for-in statement"));
return;
syntax_error:
DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_FOR);
}
DUK_LOCAL void duk__parse_switch_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_int_t pc_label_site) {
duk_hthread *thr = comp_ctx->thr;
duk_reg_t temp_at_loop;
duk_regconst_t rc_switch; /* reg/const for switch value */
duk_regconst_t rc_case; /* reg/const for case value */
duk_reg_t reg_temp; /* general temp register */
duk_int_t pc_prevcase = -1;
duk_int_t pc_prevstmt = -1;
duk_int_t pc_default = -1; /* -1 == not set, -2 == pending (next statement list) */
/* Note: negative pc values are ignored when patching jumps, so no explicit checks needed */
/*
* Switch is pretty complicated because of several conflicting concerns:
*
* - Want to generate code without an intermediate representation,
* i.e., in one go
*
* - Case selectors are expressions, not values, and may thus e.g. throw
* exceptions (which causes evaluation order concerns)
*
* - Evaluation semantics of case selectors and default clause need to be
* carefully implemented to provide correct behavior even with case value
* side effects
*
* - Fall through case and default clauses; avoiding dead JUMPs if case
* ends with an unconditional jump (a break or a continue)
*
* - The same case value may occur multiple times, but evaluation rules
* only process the first match before switching to a "propagation" mode
* where case values are no longer evaluated
*
* See E5 Section 12.11. Also see doc/compiler.rst for compilation
* discussion.
*/
duk__advance(comp_ctx);
duk__advance_expect(comp_ctx, DUK_TOK_LPAREN);
rc_switch = duk__exprtop_toregconst(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/);
duk__advance_expect(comp_ctx, DUK_TOK_RPAREN);
duk__advance_expect(comp_ctx, DUK_TOK_LCURLY);
DUK_DDD(DUK_DDDPRINT("switch value in register %ld", (long) rc_switch));
temp_at_loop = DUK__GETTEMP(comp_ctx);
for (;;) {
duk_int_t num_stmts;
duk_small_int_t tok;
/* sufficient for keeping temp reg numbers in check */
DUK__SETTEMP(comp_ctx, temp_at_loop);
if (comp_ctx->curr_token.t == DUK_TOK_RCURLY) {
break;
}
/*
* Parse a case or default clause.
*/
if (comp_ctx->curr_token.t == DUK_TOK_CASE) {
/*
* Case clause.
*
* Note: cannot use reg_case as a temp register (for SEQ target)
* because it may be a constant.
*/
duk__patch_jump_here(comp_ctx, pc_prevcase); /* chain jumps for case
* evaluation and checking
*/
duk__advance(comp_ctx);
rc_case = duk__exprtop_toregconst(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/);
duk__advance_expect(comp_ctx, DUK_TOK_COLON);
reg_temp = DUK__ALLOCTEMP(comp_ctx);
duk__emit_a_b_c(comp_ctx,
DUK_OP_SEQ,
(duk_regconst_t) reg_temp,
rc_switch,
rc_case);
duk__emit_if_true_skip(comp_ctx, (duk_regconst_t) reg_temp);
/* jump to next case clause */
pc_prevcase = duk__emit_jump_empty(comp_ctx); /* no match, next case */
/* statements go here (if any) on next loop */
} else if (comp_ctx->curr_token.t == DUK_TOK_DEFAULT) {
/*
* Default clause.
*/
if (pc_default >= 0) {
goto syntax_error;
}
duk__advance(comp_ctx);
duk__advance_expect(comp_ctx, DUK_TOK_COLON);
/* Fix for https://github.com/svaarala/duktape/issues/155:
* If 'default' is first clause (detected by pc_prevcase < 0)
* we need to ensure we stay in the matching chain.
*/
if (pc_prevcase < 0) {
DUK_DD(DUK_DDPRINT("default clause is first, emit prevcase jump"));
pc_prevcase = duk__emit_jump_empty(comp_ctx);
}
/* default clause matches next statement list (if any) */
pc_default = -2;
} else {
/* Code is not accepted before the first case/default clause */
goto syntax_error;
}
/*
* Parse code after the clause. Possible terminators are
* 'case', 'default', and '}'.
*
* Note that there may be no code at all, not even an empty statement,
* between case clauses. This must be handled just like an empty statement
* (omitting seemingly pointless JUMPs), to avoid situations like
* test-bug-case-fallthrough.js.
*/
num_stmts = 0;
if (pc_default == -2) {
pc_default = duk__get_current_pc(comp_ctx);
}
/* Note: this is correct even for default clause statements:
* they participate in 'fall-through' behavior even if the
* default clause is in the middle.
*/
duk__patch_jump_here(comp_ctx, pc_prevstmt); /* chain jumps for 'fall-through'
* after a case matches.
*/
for (;;) {
tok = comp_ctx->curr_token.t;
if (tok == DUK_TOK_CASE || tok == DUK_TOK_DEFAULT ||
tok == DUK_TOK_RCURLY) {
break;
}
num_stmts++;
duk__parse_stmt(comp_ctx, res, 0 /*allow_source_elem*/);
}
/* fall-through jump to next code of next case (backpatched) */
pc_prevstmt = duk__emit_jump_empty(comp_ctx);
/* XXX: would be nice to omit this jump when the jump is not
* reachable, at least in the obvious cases (such as the case
* ending with a 'break'.
*
* Perhaps duk__parse_stmt() could provide some info on whether
* the statement is a "dead end"?
*
* If implemented, just set pc_prevstmt to -1 when not needed.
*/
}
DUK_ASSERT(comp_ctx->curr_token.t == DUK_TOK_RCURLY);
duk__advance(comp_ctx);
/* default case control flow patchup; note that if pc_prevcase < 0
* (i.e. no case clauses), control enters default case automatically.
*/
if (pc_default >= 0) {
/* default case exists: go there if no case matches */
duk__patch_jump(comp_ctx, pc_prevcase, pc_default);
} else {
/* default case does not exist, or no statements present
* after default case: finish case evaluation
*/
duk__patch_jump_here(comp_ctx, pc_prevcase);
}
/* fall-through control flow patchup; note that pc_prevstmt may be
* < 0 (i.e. no case clauses), in which case this is a no-op.
*/
duk__patch_jump_here(comp_ctx, pc_prevstmt);
/* continue jump not patched, an INVALID opcode remains there */
duk__patch_jump_here(comp_ctx, pc_label_site + 1); /* break jump */
/* Note: 'fast' breaks will jump to pc_label_site + 1, which will
* then jump here. The double jump will be eliminated by a
* peephole pass, resulting in an optimal jump here. The label
* site jumps will remain in bytecode and will waste code size.
*/
return;
syntax_error:
DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_SWITCH);
}
DUK_LOCAL void duk__parse_if_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res) {
duk_reg_t temp_reset;
duk_regconst_t rc_cond;
duk_int_t pc_jump_false;
DUK_DDD(DUK_DDDPRINT("begin parsing if statement"));
temp_reset = DUK__GETTEMP(comp_ctx);
duk__advance(comp_ctx); /* eat 'if' */
duk__advance_expect(comp_ctx, DUK_TOK_LPAREN);
rc_cond = duk__exprtop_toregconst(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/);
duk__emit_if_true_skip(comp_ctx, rc_cond);
pc_jump_false = duk__emit_jump_empty(comp_ctx); /* jump to end or else part */
DUK__SETTEMP(comp_ctx, temp_reset);
duk__advance_expect(comp_ctx, DUK_TOK_RPAREN);
duk__parse_stmt(comp_ctx, res, 0 /*allow_source_elem*/);
/* The 'else' ambiguity is resolved by 'else' binding to the innermost
* construct, so greedy matching is correct here.
*/
if (comp_ctx->curr_token.t == DUK_TOK_ELSE) {
duk_int_t pc_jump_end;
DUK_DDD(DUK_DDDPRINT("if has else part"));
duk__advance(comp_ctx);
pc_jump_end = duk__emit_jump_empty(comp_ctx); /* jump from true part to end */
duk__patch_jump_here(comp_ctx, pc_jump_false);
duk__parse_stmt(comp_ctx, res, 0 /*allow_source_elem*/);
duk__patch_jump_here(comp_ctx, pc_jump_end);
} else {
DUK_DDD(DUK_DDDPRINT("if does not have else part"));
duk__patch_jump_here(comp_ctx, pc_jump_false);
}
DUK_DDD(DUK_DDDPRINT("end parsing if statement"));
}
DUK_LOCAL void duk__parse_do_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_int_t pc_label_site) {
duk_regconst_t rc_cond;
duk_int_t pc_start;
DUK_DDD(DUK_DDDPRINT("begin parsing do statement"));
duk__advance(comp_ctx); /* eat 'do' */
pc_start = duk__get_current_pc(comp_ctx);
duk__parse_stmt(comp_ctx, res, 0 /*allow_source_elem*/);
duk__patch_jump_here(comp_ctx, pc_label_site + 2); /* continue jump */
duk__advance_expect(comp_ctx, DUK_TOK_WHILE);
duk__advance_expect(comp_ctx, DUK_TOK_LPAREN);
rc_cond = duk__exprtop_toregconst(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/);
duk__emit_if_false_skip(comp_ctx, rc_cond);
duk__emit_jump(comp_ctx, pc_start);
/* no need to reset temps, as we're finished emitting code */
duk__advance_expect(comp_ctx, DUK_TOK_RPAREN);
duk__patch_jump_here(comp_ctx, pc_label_site + 1); /* break jump */
DUK_DDD(DUK_DDDPRINT("end parsing do statement"));
}
DUK_LOCAL void duk__parse_while_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_int_t pc_label_site) {
duk_reg_t temp_reset;
duk_regconst_t rc_cond;
duk_int_t pc_start;
duk_int_t pc_jump_false;
DUK_DDD(DUK_DDDPRINT("begin parsing while statement"));
temp_reset = DUK__GETTEMP(comp_ctx);
duk__advance(comp_ctx); /* eat 'while' */
duk__advance_expect(comp_ctx, DUK_TOK_LPAREN);
pc_start = duk__get_current_pc(comp_ctx);
duk__patch_jump_here(comp_ctx, pc_label_site + 2); /* continue jump */
rc_cond = duk__exprtop_toregconst(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/);
duk__emit_if_true_skip(comp_ctx, rc_cond);
pc_jump_false = duk__emit_jump_empty(comp_ctx);
DUK__SETTEMP(comp_ctx, temp_reset);
duk__advance_expect(comp_ctx, DUK_TOK_RPAREN);
duk__parse_stmt(comp_ctx, res, 0 /*allow_source_elem*/);
duk__emit_jump(comp_ctx, pc_start);
duk__patch_jump_here(comp_ctx, pc_jump_false);
duk__patch_jump_here(comp_ctx, pc_label_site + 1); /* break jump */
DUK_DDD(DUK_DDDPRINT("end parsing while statement"));
}
DUK_LOCAL void duk__parse_break_or_continue_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res) {
duk_hthread *thr = comp_ctx->thr;
duk_bool_t is_break = (comp_ctx->curr_token.t == DUK_TOK_BREAK);
duk_int_t label_id;
duk_int_t label_catch_depth;
duk_int_t label_pc; /* points to LABEL; pc+1 = jump site for break; pc+2 = jump site for continue */
duk_bool_t label_is_closest;
DUK_UNREF(res);
duk__advance(comp_ctx); /* eat 'break' or 'continue' */
if (comp_ctx->curr_token.t == DUK_TOK_SEMICOLON || /* explicit semi follows */
comp_ctx->curr_token.lineterm || /* automatic semi will be inserted */
comp_ctx->curr_token.allow_auto_semi) { /* automatic semi will be inserted */
/* break/continue without label */
duk__lookup_active_label(comp_ctx, DUK_HTHREAD_STRING_EMPTY_STRING(thr), is_break, &label_id, &label_catch_depth, &label_pc, &label_is_closest);
} else if (comp_ctx->curr_token.t == DUK_TOK_IDENTIFIER) {
/* break/continue with label (label cannot be a reserved word, production is 'Identifier' */
DUK_ASSERT(comp_ctx->curr_token.str1 != NULL);
duk__lookup_active_label(comp_ctx, comp_ctx->curr_token.str1, is_break, &label_id, &label_catch_depth, &label_pc, &label_is_closest);
duk__advance(comp_ctx);
} else {
DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_BREAK_CONT_LABEL);
}
/* Use a fast break/continue when possible. A fast break/continue is
* just a jump to the LABEL break/continue jump slot, which then jumps
* to an appropriate place (for break, going through ENDLABEL correctly).
* The peephole optimizer will optimize the jump to a direct one.
*/
if (label_catch_depth == comp_ctx->curr_func.catch_depth &&
label_is_closest) {
DUK_DDD(DUK_DDDPRINT("break/continue: is_break=%ld, label_id=%ld, label_is_closest=%ld, "
"label_catch_depth=%ld, catch_depth=%ld "
"-> use fast variant (direct jump)",
(long) is_break, (long) label_id, (long) label_is_closest,
(long) label_catch_depth, (long) comp_ctx->curr_func.catch_depth));
duk__emit_jump(comp_ctx, label_pc + (is_break ? 1 : 2));
} else {
DUK_DDD(DUK_DDDPRINT("break/continue: is_break=%ld, label_id=%ld, label_is_closest=%ld, "
"label_catch_depth=%ld, catch_depth=%ld "
"-> use slow variant (longjmp)",
(long) is_break, (long) label_id, (long) label_is_closest,
(long) label_catch_depth, (long) comp_ctx->curr_func.catch_depth));
duk__emit_extraop_bc(comp_ctx,
is_break ? DUK_EXTRAOP_BREAK : DUK_EXTRAOP_CONTINUE,
(duk_regconst_t) label_id);
}
}
DUK_LOCAL void duk__parse_return_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res) {
duk_hthread *thr = comp_ctx->thr;
duk_regconst_t rc_val;
duk_small_uint_t ret_flags;
duk__advance(comp_ctx); /* eat 'return' */
/* A 'return' statement is only allowed inside an actual function body,
* not as part of eval or global code.
*/
if (!comp_ctx->curr_func.is_function) {
DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_RETURN);
}
ret_flags = 0;
if (comp_ctx->curr_token.t == DUK_TOK_SEMICOLON || /* explicit semi follows */
comp_ctx->curr_token.lineterm || /* automatic semi will be inserted */
comp_ctx->curr_token.allow_auto_semi) { /* automatic semi will be inserted */
DUK_DDD(DUK_DDDPRINT("empty return value -> undefined"));
rc_val = 0;
} else {
duk_int_t pc_before_expr;
duk_int_t pc_after_expr;
DUK_DDD(DUK_DDDPRINT("return with a value"));
DUK_UNREF(pc_before_expr);
DUK_UNREF(pc_after_expr);
pc_before_expr = duk__get_current_pc(comp_ctx);
rc_val = duk__exprtop_toregconst(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/);
pc_after_expr = duk__get_current_pc(comp_ctx);
/* Tail call check: if last opcode emitted was CALL(I), and
* the context allows it, change the CALL(I) to a tail call.
* This doesn't guarantee that a tail call will be allowed at
* runtime, so the RETURN must still be emitted. (Duktape
* 0.10.0 avoided this and simulated a RETURN if a tail call
* couldn't be used at runtime; but this didn't work
* correctly with a thread yield/resume, see
* test-bug-tailcall-thread-yield-resume.js for discussion.)
*
* In addition to the last opcode being CALL, we also need to
* be sure that 'rc_val' is the result register of the CALL(I).
* For instance, for the expression 'return 0, (function ()
* { return 1; }), 2' the last opcode emitted is CALL (no
* bytecode is emitted for '2') but 'rc_val' indicates
* constant '2'. Similarly if '2' is replaced by a register
* bound variable, no opcodes are emitted but tail call would
* be incorrect.
*
* This is tricky and easy to get wrong. It would be best to
* track enough expression metadata to check that 'rc_val' came
* from that last CALL instruction. We don't have that metadata
* now, so we check that 'rc_val' is a temporary register result
* (not a constant or a register bound variable). There should
* be no way currently for 'rc_val' to be a temporary for an
* expression following the CALL instruction without emitting
* some opcodes following the CALL. This proxy check is used
* below.
*
* See: test-bug-comma-expr-gh131.js.
*
* The non-standard 'caller' property disables tail calls
* because they pose some special cases which haven't been
* fixed yet.
*/
#if defined(DUK_USE_TAILCALL)
if (comp_ctx->curr_func.catch_depth == 0 && /* no catchers */
pc_after_expr > pc_before_expr) { /* at least one opcode emitted */
duk_compiler_instr *instr;
duk_small_uint_t op;
instr = duk__get_instr_ptr(comp_ctx, pc_after_expr - 1);
DUK_ASSERT(instr != NULL);
op = (duk_small_uint_t) DUK_DEC_OP(instr->ins);
if ((op == DUK_OP_CALL || op == DUK_OP_CALLI) &&
DUK__ISTEMP(comp_ctx, rc_val) /* see above */) {
DUK_DDD(DUK_DDDPRINT("return statement detected a tail call opportunity: "
"catch depth is 0, duk__exprtop() emitted >= 1 instructions, "
"and last instruction is a CALL "
"-> set TAILCALL flag"));
/* Just flip the single bit. */
instr->ins |= DUK_ENC_OP_A_B_C(0, DUK_BC_CALL_FLAG_TAILCALL, 0, 0);
}
}
#endif /* DUK_USE_TAILCALL */
ret_flags = DUK_BC_RETURN_FLAG_HAVE_RETVAL;
}
duk__emit_a_b(comp_ctx,
DUK_OP_RETURN | DUK__EMIT_FLAG_NO_SHUFFLE_A,
(duk_regconst_t) ret_flags /*flags*/,
rc_val /*reg*/);
}
DUK_LOCAL void duk__parse_throw_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res) {
duk_reg_t reg_val;
duk__advance(comp_ctx); /* eat 'throw' */
/* Unlike break/continue, throw statement does not allow an empty value. */
if (comp_ctx->curr_token.lineterm) {
DUK_ERROR_SYNTAX(comp_ctx->thr, DUK_STR_INVALID_THROW);
}
reg_val = duk__exprtop_toreg(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/);
duk__emit_extraop_bc(comp_ctx,
DUK_EXTRAOP_THROW,
(duk_regconst_t) reg_val);
}
DUK_LOCAL void duk__parse_try_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_reg_t reg_catch; /* reg_catch+0 and reg_catch+1 are reserved for TRYCATCH */
duk_regconst_t rc_varname = 0;
duk_small_uint_t trycatch_flags = 0;
duk_int_t pc_ldconst = -1;
duk_int_t pc_trycatch = -1;
duk_int_t pc_catch = -1;
duk_int_t pc_finally = -1;
DUK_UNREF(res);
/*
* See the following documentation for discussion:
*
* doc/execution.rst: control flow details
*
* Try, catch, and finally "parts" are Blocks, not Statements, so
* they must always be delimited by curly braces. This is unlike e.g.
* the if statement, which accepts any Statement. This eliminates any
* questions of matching parts of nested try statements. The Block
* parsing is implemented inline here (instead of calling out).
*
* Finally part has a 'let scoped' variable, which requires a few kinks
* here.
*/
comp_ctx->curr_func.catch_depth++;
duk__advance(comp_ctx); /* eat 'try' */
reg_catch = DUK__ALLOCTEMPS(comp_ctx, 2);
/* The target for this LDCONST may need output shuffling, but we assume
* that 'pc_ldconst' will be the LDCONST that we can patch later. This
* should be the case because there's no input shuffling. (If there's
* no catch clause, this LDCONST will be replaced with a NOP.)
*/
pc_ldconst = duk__get_current_pc(comp_ctx);
duk__emit_a_bc(comp_ctx, DUK_OP_LDCONST, reg_catch, 0 /*patched later*/);
pc_trycatch = duk__get_current_pc(comp_ctx);
duk__emit_invalid(comp_ctx); /* TRYCATCH, cannot emit now (not enough info) */
duk__emit_invalid(comp_ctx); /* jump for 'catch' case */
duk__emit_invalid(comp_ctx); /* jump for 'finally' case or end (if no finally) */
/* try part */
duk__advance_expect(comp_ctx, DUK_TOK_LCURLY);
duk__parse_stmts(comp_ctx, 0 /*allow_source_elem*/, 0 /*expect_eof*/);
/* the DUK_TOK_RCURLY is eaten by duk__parse_stmts() */
duk__emit_extraop_only(comp_ctx,
DUK_EXTRAOP_ENDTRY);
if (comp_ctx->curr_token.t == DUK_TOK_CATCH) {
/*
* The catch variable must be updated to reflect the new allocated
* register for the duration of the catch clause. We need to store
* and restore the original value for the varmap entry (if any).
*/
/*
* Note: currently register bindings must be fixed for the entire
* function. So, even though the catch variable is in a register
* we know, we must use an explicit environment record and slow path
* accesses to read/write the catch binding to make closures created
* within the catch clause work correctly. This restriction should
* be fixable (at least in common cases) later.
*
* See: test-bug-catch-binding-2.js.
*
* XXX: improve to get fast path access to most catch clauses.
*/
duk_hstring *h_var;
duk_int_t varmap_value; /* for storing/restoring the varmap binding for catch variable */
DUK_DDD(DUK_DDDPRINT("stack top at start of catch clause: %ld", (long) duk_get_top(ctx)));
trycatch_flags |= DUK_BC_TRYCATCH_FLAG_HAVE_CATCH;
pc_catch = duk__get_current_pc(comp_ctx);
duk__advance(comp_ctx);
duk__advance_expect(comp_ctx, DUK_TOK_LPAREN);
if (comp_ctx->curr_token.t != DUK_TOK_IDENTIFIER) {
/* Identifier, i.e. don't allow reserved words */
goto syntax_error;
}
h_var = comp_ctx->curr_token.str1;
DUK_ASSERT(h_var != NULL);
duk_push_hstring(ctx, h_var); /* keep in on valstack, use borrowed ref below */
if (comp_ctx->curr_func.is_strict &&
((h_var == DUK_HTHREAD_STRING_EVAL(thr)) ||
(h_var == DUK_HTHREAD_STRING_LC_ARGUMENTS(thr)))) {
DUK_DDD(DUK_DDDPRINT("catch identifier 'eval' or 'arguments' in strict mode -> SyntaxError"));
goto syntax_error;
}
duk_dup_top(ctx);
rc_varname = duk__getconst(comp_ctx);
DUK_DDD(DUK_DDDPRINT("catch clause, rc_varname=0x%08lx (%ld)",
(unsigned long) rc_varname, (long) rc_varname));
duk__advance(comp_ctx);
duk__advance_expect(comp_ctx, DUK_TOK_RPAREN);
duk__advance_expect(comp_ctx, DUK_TOK_LCURLY);
DUK_DDD(DUK_DDDPRINT("varmap before modifying for catch clause: %!iT",
(duk_tval *) duk_get_tval(ctx, comp_ctx->curr_func.varmap_idx)));
duk_dup_top(ctx);
duk_get_prop(ctx, comp_ctx->curr_func.varmap_idx);
if (duk_is_undefined(ctx, -1)) {
varmap_value = -2;
} else if (duk_is_null(ctx, -1)) {
varmap_value = -1;
} else {
DUK_ASSERT(duk_is_number(ctx, -1));
varmap_value = duk_get_int(ctx, -1);
DUK_ASSERT(varmap_value >= 0);
}
duk_pop(ctx);
#if 0
/* It'd be nice to do something like this - but it doesn't
* work for closures created inside the catch clause.
*/
duk_dup_top(ctx);
duk_push_int(ctx, (duk_int_t) (reg_catch + 0));
duk_put_prop(ctx, comp_ctx->curr_func.varmap_idx);
#endif
duk_dup_top(ctx);
duk_push_null(ctx);
duk_put_prop(ctx, comp_ctx->curr_func.varmap_idx);
duk__emit_a_bc(comp_ctx,
DUK_OP_PUTVAR | DUK__EMIT_FLAG_A_IS_SOURCE,
(duk_regconst_t) (reg_catch + 0) /*value*/,
rc_varname /*varname*/);
DUK_DDD(DUK_DDDPRINT("varmap before parsing catch clause: %!iT",
(duk_tval *) duk_get_tval(ctx, comp_ctx->curr_func.varmap_idx)));
duk__parse_stmts(comp_ctx, 0 /*allow_source_elem*/, 0 /*expect_eof*/);
/* the DUK_TOK_RCURLY is eaten by duk__parse_stmts() */
if (varmap_value == -2) {
/* not present */
duk_del_prop(ctx, comp_ctx->curr_func.varmap_idx);
} else {
if (varmap_value == -1) {
duk_push_null(ctx);
} else {
DUK_ASSERT(varmap_value >= 0);
duk_push_int(ctx, varmap_value);
}
duk_put_prop(ctx, comp_ctx->curr_func.varmap_idx);
}
/* varname is popped by above code */
DUK_DDD(DUK_DDDPRINT("varmap after restore catch clause: %!iT",
(duk_tval *) duk_get_tval(ctx, comp_ctx->curr_func.varmap_idx)));
duk__emit_extraop_only(comp_ctx,
DUK_EXTRAOP_ENDCATCH);
/*
* XXX: for now, indicate that an expensive catch binding
* declarative environment is always needed. If we don't
* need it, we don't need the const_varname either.
*/
trycatch_flags |= DUK_BC_TRYCATCH_FLAG_CATCH_BINDING;
DUK_DDD(DUK_DDDPRINT("stack top at end of catch clause: %ld", (long) duk_get_top(ctx)));
}
if (comp_ctx->curr_token.t == DUK_TOK_FINALLY) {
trycatch_flags |= DUK_BC_TRYCATCH_FLAG_HAVE_FINALLY;
pc_finally = duk__get_current_pc(comp_ctx);
duk__advance(comp_ctx);
duk__advance_expect(comp_ctx, DUK_TOK_LCURLY);
duk__parse_stmts(comp_ctx, 0 /*allow_source_elem*/, 0 /*expect_eof*/);
/* the DUK_TOK_RCURLY is eaten by duk__parse_stmts() */
duk__emit_extraop_b(comp_ctx,
DUK_EXTRAOP_ENDFIN,
reg_catch); /* rethrow */
}
if (!(trycatch_flags & DUK_BC_TRYCATCH_FLAG_HAVE_CATCH) &&
!(trycatch_flags & DUK_BC_TRYCATCH_FLAG_HAVE_FINALLY)) {
/* must have catch and/or finally */
goto syntax_error;
}
/* If there's no catch block, rc_varname will be 0 and duk__patch_trycatch()
* will replace the LDCONST with a NOP. For any actual constant (including
* constant 0) the DUK__CONST_MARKER flag will be set in rc_varname.
*/
duk__patch_trycatch(comp_ctx,
pc_ldconst,
pc_trycatch,
reg_catch,
rc_varname,
trycatch_flags);
if (trycatch_flags & DUK_BC_TRYCATCH_FLAG_HAVE_CATCH) {
DUK_ASSERT(pc_catch >= 0);
duk__patch_jump(comp_ctx, pc_trycatch + 1, pc_catch);
}
if (trycatch_flags & DUK_BC_TRYCATCH_FLAG_HAVE_FINALLY) {
DUK_ASSERT(pc_finally >= 0);
duk__patch_jump(comp_ctx, pc_trycatch + 2, pc_finally);
} else {
/* without finally, the second jump slot is used to jump to end of stmt */
duk__patch_jump_here(comp_ctx, pc_trycatch + 2);
}
comp_ctx->curr_func.catch_depth--;
return;
syntax_error:
DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_TRY);
}
DUK_LOCAL void duk__parse_with_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res) {
duk_int_t pc_trycatch;
duk_int_t pc_finished;
duk_reg_t reg_catch;
duk_small_uint_t trycatch_flags;
if (comp_ctx->curr_func.is_strict) {
DUK_ERROR_SYNTAX(comp_ctx->thr, DUK_STR_WITH_IN_STRICT_MODE);
}
comp_ctx->curr_func.catch_depth++;
duk__advance(comp_ctx); /* eat 'with' */
reg_catch = DUK__ALLOCTEMPS(comp_ctx, 2);
duk__advance_expect(comp_ctx, DUK_TOK_LPAREN);
duk__exprtop_toforcedreg(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/, reg_catch);
duk__advance_expect(comp_ctx, DUK_TOK_RPAREN);
pc_trycatch = duk__get_current_pc(comp_ctx);
trycatch_flags = DUK_BC_TRYCATCH_FLAG_WITH_BINDING;
duk__emit_a_bc(comp_ctx,
DUK_OP_TRYCATCH | DUK__EMIT_FLAG_NO_SHUFFLE_A,
(duk_regconst_t) trycatch_flags /*a*/,
(duk_regconst_t) reg_catch /*bc*/);
duk__emit_invalid(comp_ctx); /* catch jump */
duk__emit_invalid(comp_ctx); /* finished jump */
duk__parse_stmt(comp_ctx, res, 0 /*allow_source_elem*/);
duk__emit_extraop_only(comp_ctx,
DUK_EXTRAOP_ENDTRY);
pc_finished = duk__get_current_pc(comp_ctx);
duk__patch_jump(comp_ctx, pc_trycatch + 2, pc_finished);
comp_ctx->curr_func.catch_depth--;
}
DUK_LOCAL duk_int_t duk__stmt_label_site(duk_compiler_ctx *comp_ctx, duk_int_t label_id) {
/* if a site already exists, nop: max one label site per statement */
if (label_id >= 0) {
return label_id;
}
label_id = comp_ctx->curr_func.label_next++;
DUK_DDD(DUK_DDDPRINT("allocated new label id for label site: %ld", (long) label_id));
duk__emit_extraop_bc(comp_ctx,
DUK_EXTRAOP_LABEL,
(duk_regconst_t) label_id);
duk__emit_invalid(comp_ctx);
duk__emit_invalid(comp_ctx);
return label_id;
}
/* Parse a single statement.
*
* Creates a label site (with an empty label) automatically for iteration
* statements. Also "peels off" any label statements for explicit labels.
*/
DUK_LOCAL void duk__parse_stmt(duk_compiler_ctx *comp_ctx, duk_ivalue *res, duk_bool_t allow_source_elem) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_bool_t dir_prol_at_entry; /* directive prologue status at entry */
duk_reg_t temp_at_entry;
duk_uarridx_t labels_len_at_entry;
duk_int_t pc_at_entry; /* assumed to also be PC of "LABEL" */
duk_int_t stmt_id;
duk_small_uint_t stmt_flags = 0;
duk_int_t label_id = -1;
duk_small_uint_t tok;
DUK__RECURSION_INCREASE(comp_ctx, thr);
temp_at_entry = DUK__GETTEMP(comp_ctx);
pc_at_entry = duk__get_current_pc(comp_ctx);
labels_len_at_entry = (duk_uarridx_t) duk_get_length(ctx, comp_ctx->curr_func.labelnames_idx);
stmt_id = comp_ctx->curr_func.stmt_next++;
dir_prol_at_entry = comp_ctx->curr_func.in_directive_prologue;
DUK_UNREF(stmt_id);
DUK_DDD(DUK_DDDPRINT("parsing a statement, stmt_id=%ld, temp_at_entry=%ld, labels_len_at_entry=%ld, "
"is_strict=%ld, in_directive_prologue=%ld, catch_depth=%ld",
(long) stmt_id, (long) temp_at_entry, (long) labels_len_at_entry,
(long) comp_ctx->curr_func.is_strict, (long) comp_ctx->curr_func.in_directive_prologue,
(long) comp_ctx->curr_func.catch_depth));
/* The directive prologue flag is cleared by default so that it is
* unset for any recursive statement parsing. It is only "revived"
* if a directive is detected. (We could also make directives only
* allowed if 'allow_source_elem' was true.)
*/
comp_ctx->curr_func.in_directive_prologue = 0;
retry_parse:
DUK_DDD(DUK_DDDPRINT("try stmt parse, stmt_id=%ld, label_id=%ld, allow_source_elem=%ld, catch_depth=%ld",
(long) stmt_id, (long) label_id, (long) allow_source_elem,
(long) comp_ctx->curr_func.catch_depth));
/*
* Detect iteration statements; if encountered, establish an
* empty label.
*/
tok = comp_ctx->curr_token.t;
if (tok == DUK_TOK_FOR || tok == DUK_TOK_DO || tok == DUK_TOK_WHILE ||
tok == DUK_TOK_SWITCH) {
DUK_DDD(DUK_DDDPRINT("iteration/switch statement -> add empty label"));
label_id = duk__stmt_label_site(comp_ctx, label_id);
duk__add_label(comp_ctx,
DUK_HTHREAD_STRING_EMPTY_STRING(thr),
pc_at_entry /*pc_label*/,
label_id);
}
/*
* Main switch for statement / source element type.
*/
switch (comp_ctx->curr_token.t) {
case DUK_TOK_FUNCTION: {
/*
* Function declaration, function expression, or (non-standard)
* function statement.
*
* The E5 specification only allows function declarations at
* the top level (in "source elements"). An ExpressionStatement
* is explicitly not allowed to begin with a "function" keyword
* (E5 Section 12.4). Hence any non-error semantics for such
* non-top-level statements are non-standard. Duktape semantics
* for function statements are modelled after V8, see
* test-dev-func-decl-outside-top.js.
*/
#if defined(DUK_USE_NONSTD_FUNC_STMT)
/* Lenient: allow function declarations outside top level in
* non-strict mode but reject them in strict mode.
*/
if (allow_source_elem || !comp_ctx->curr_func.is_strict)
#else /* DUK_USE_NONSTD_FUNC_STMT */
/* Strict: never allow function declarations outside top level. */
if (allow_source_elem)
#endif /* DUK_USE_NONSTD_FUNC_STMT */
{
/* FunctionDeclaration: not strictly a statement but handled as such.
*
* O(depth^2) parse count for inner functions is handled by recording a
* lexer offset on the first compilation pass, so that the function can
* be efficiently skipped on the second pass. This is encapsulated into
* duk__parse_func_like_fnum().
*/
duk_int_t fnum;
DUK_DDD(DUK_DDDPRINT("function declaration statement"));
duk__advance(comp_ctx); /* eat 'function' */
fnum = duk__parse_func_like_fnum(comp_ctx, 1 /*is_decl*/, 0 /*is_setget*/);
if (comp_ctx->curr_func.in_scanning) {
duk_uarridx_t n;
duk_hstring *h_funcname;
duk_get_prop_index(ctx, comp_ctx->curr_func.funcs_idx, fnum * 3);
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_NAME); /* -> [ ... func name ] */
h_funcname = duk_get_hstring(ctx, -1);
DUK_ASSERT(h_funcname != NULL);
DUK_DDD(DUK_DDDPRINT("register function declaration %!O in pass 1, fnum %ld",
(duk_heaphdr *) h_funcname, (long) fnum));
n = (duk_uarridx_t) duk_get_length(ctx, comp_ctx->curr_func.decls_idx);
duk_push_hstring(ctx, h_funcname);
duk_put_prop_index(ctx, comp_ctx->curr_func.decls_idx, n);
duk_push_int(ctx, (duk_int_t) (DUK_DECL_TYPE_FUNC + (fnum << 8)));
duk_put_prop_index(ctx, comp_ctx->curr_func.decls_idx, n + 1);
duk_pop_n(ctx, 2);
}
/* no statement value (unlike function expression) */
stmt_flags = 0;
break;
} else {
DUK_ERROR_SYNTAX(thr, DUK_STR_FUNC_STMT_NOT_ALLOWED);
}
break;
}
case DUK_TOK_LCURLY: {
DUK_DDD(DUK_DDDPRINT("block statement"));
duk__advance(comp_ctx);
duk__parse_stmts(comp_ctx, 0 /*allow_source_elem*/, 0 /*expect_eof*/);
/* the DUK_TOK_RCURLY is eaten by duk__parse_stmts() */
if (label_id >= 0) {
duk__patch_jump_here(comp_ctx, pc_at_entry + 1); /* break jump */
}
stmt_flags = 0;
break;
}
case DUK_TOK_CONST: {
DUK_DDD(DUK_DDDPRINT("constant declaration statement"));
duk__parse_var_stmt(comp_ctx, res, DUK__EXPR_FLAG_REQUIRE_INIT /*expr_flags*/);
stmt_flags = DUK__HAS_TERM;
break;
}
case DUK_TOK_VAR: {
DUK_DDD(DUK_DDDPRINT("variable declaration statement"));
duk__parse_var_stmt(comp_ctx, res, 0 /*expr_flags*/);
stmt_flags = DUK__HAS_TERM;
break;
}
case DUK_TOK_SEMICOLON: {
/* empty statement with an explicit semicolon */
DUK_DDD(DUK_DDDPRINT("empty statement"));
stmt_flags = DUK__HAS_TERM;
break;
}
case DUK_TOK_IF: {
DUK_DDD(DUK_DDDPRINT("if statement"));
duk__parse_if_stmt(comp_ctx, res);
if (label_id >= 0) {
duk__patch_jump_here(comp_ctx, pc_at_entry + 1); /* break jump */
}
stmt_flags = 0;
break;
}
case DUK_TOK_DO: {
/*
* Do-while statement is mostly trivial, but there is special
* handling for automatic semicolon handling (triggered by the
* DUK__ALLOW_AUTO_SEMI_ALWAYS) flag related to a bug filed at:
*
* https://bugs.ecmascript.org/show_bug.cgi?id=8
*
* See doc/compiler.rst for details.
*/
DUK_DDD(DUK_DDDPRINT("do statement"));
DUK_ASSERT(label_id >= 0);
duk__update_label_flags(comp_ctx,
label_id,
DUK_LABEL_FLAG_ALLOW_BREAK | DUK_LABEL_FLAG_ALLOW_CONTINUE);
duk__parse_do_stmt(comp_ctx, res, pc_at_entry);
stmt_flags = DUK__HAS_TERM | DUK__ALLOW_AUTO_SEMI_ALWAYS; /* DUK__ALLOW_AUTO_SEMI_ALWAYS workaround */
break;
}
case DUK_TOK_WHILE: {
DUK_DDD(DUK_DDDPRINT("while statement"));
DUK_ASSERT(label_id >= 0);
duk__update_label_flags(comp_ctx,
label_id,
DUK_LABEL_FLAG_ALLOW_BREAK | DUK_LABEL_FLAG_ALLOW_CONTINUE);
duk__parse_while_stmt(comp_ctx, res, pc_at_entry);
stmt_flags = 0;
break;
}
case DUK_TOK_FOR: {
/*
* For/for-in statement is complicated to parse because
* determining the statement type (three-part for vs. a
* for-in) requires potential backtracking.
*
* See the helper for the messy stuff.
*/
DUK_DDD(DUK_DDDPRINT("for/for-in statement"));
DUK_ASSERT(label_id >= 0);
duk__update_label_flags(comp_ctx,
label_id,
DUK_LABEL_FLAG_ALLOW_BREAK | DUK_LABEL_FLAG_ALLOW_CONTINUE);
duk__parse_for_stmt(comp_ctx, res, pc_at_entry);
stmt_flags = 0;
break;
}
case DUK_TOK_CONTINUE:
case DUK_TOK_BREAK: {
DUK_DDD(DUK_DDDPRINT("break/continue statement"));
duk__parse_break_or_continue_stmt(comp_ctx, res);
stmt_flags = DUK__HAS_TERM | DUK__IS_TERMINAL;
break;
}
case DUK_TOK_RETURN: {
DUK_DDD(DUK_DDDPRINT("return statement"));
duk__parse_return_stmt(comp_ctx, res);
stmt_flags = DUK__HAS_TERM | DUK__IS_TERMINAL;
break;
}
case DUK_TOK_WITH: {
DUK_DDD(DUK_DDDPRINT("with statement"));
comp_ctx->curr_func.with_depth++;
duk__parse_with_stmt(comp_ctx, res);
if (label_id >= 0) {
duk__patch_jump_here(comp_ctx, pc_at_entry + 1); /* break jump */
}
comp_ctx->curr_func.with_depth--;
stmt_flags = 0;
break;
}
case DUK_TOK_SWITCH: {
/*
* The switch statement is pretty messy to compile.
* See the helper for details.
*/
DUK_DDD(DUK_DDDPRINT("switch statement"));
DUK_ASSERT(label_id >= 0);
duk__update_label_flags(comp_ctx,
label_id,
DUK_LABEL_FLAG_ALLOW_BREAK); /* don't allow continue */
duk__parse_switch_stmt(comp_ctx, res, pc_at_entry);
stmt_flags = 0;
break;
}
case DUK_TOK_THROW: {
DUK_DDD(DUK_DDDPRINT("throw statement"));
duk__parse_throw_stmt(comp_ctx, res);
stmt_flags = DUK__HAS_TERM | DUK__IS_TERMINAL;
break;
}
case DUK_TOK_TRY: {
DUK_DDD(DUK_DDDPRINT("try statement"));
duk__parse_try_stmt(comp_ctx, res);
stmt_flags = 0;
break;
}
case DUK_TOK_DEBUGGER: {
duk__advance(comp_ctx);
#if defined(DUK_USE_DEBUGGER_SUPPORT)
DUK_DDD(DUK_DDDPRINT("debugger statement: debugging enabled, emit debugger opcode"));
duk__emit_extraop_only(comp_ctx, DUK_EXTRAOP_DEBUGGER);
#else
DUK_DDD(DUK_DDDPRINT("debugger statement: ignored"));
#endif
stmt_flags = DUK__HAS_TERM;
break;
}
default: {
/*
* Else, must be one of:
* - ExpressionStatement, possibly a directive (String)
* - LabelledStatement (Identifier followed by ':')
*
* Expressions beginning with 'function' keyword are covered by a case
* above (such expressions are not allowed in standard E5 anyway).
* Also expressions starting with '{' are interpreted as block
* statements. See E5 Section 12.4.
*
* Directive detection is tricky; see E5 Section 14.1 on directive
* prologue. A directive is an expression statement with a single
* string literal and an explicit or automatic semicolon. Escape
* characters are significant and no parens etc are allowed:
*
* 'use strict'; // valid 'use strict' directive
* 'use\u0020strict'; // valid directive, not a 'use strict' directive
* ('use strict'); // not a valid directive
*
* The expression is determined to consist of a single string literal
* based on duk__expr_nud() and duk__expr_led() call counts. The string literal
* of a 'use strict' directive is determined to lack any escapes based
* num_escapes count from the lexer. Note that other directives may be
* allowed to contain escapes, so a directive with escapes does not
* terminate a directive prologue.
*
* We rely on the fact that the expression parser will not emit any
* code for a single token expression. However, it will generate an
* intermediate value which we will then successfully ignore.
*
* A similar approach is used for labels.
*/
duk_bool_t single_token;
DUK_DDD(DUK_DDDPRINT("expression statement"));
duk__exprtop(comp_ctx, res, DUK__BP_FOR_EXPR /*rbp_flags*/);
single_token = (comp_ctx->curr_func.nud_count == 1 && /* one token */
comp_ctx->curr_func.led_count == 0); /* no operators */
if (single_token &&
comp_ctx->prev_token.t == DUK_TOK_IDENTIFIER &&
comp_ctx->curr_token.t == DUK_TOK_COLON) {
/*
* Detected label
*/
duk_hstring *h_lab;
/* expected ival */
DUK_ASSERT(res->t == DUK_IVAL_VAR);
DUK_ASSERT(res->x1.t == DUK_ISPEC_VALUE);
DUK_ASSERT(DUK_TVAL_IS_STRING(duk_get_tval(ctx, res->x1.valstack_idx)));
h_lab = comp_ctx->prev_token.str1;
DUK_ASSERT(h_lab != NULL);
DUK_DDD(DUK_DDDPRINT("explicit label site for label '%!O'",
(duk_heaphdr *) h_lab));
duk__advance(comp_ctx); /* eat colon */
label_id = duk__stmt_label_site(comp_ctx, label_id);
duk__add_label(comp_ctx,
h_lab,
pc_at_entry /*pc_label*/,
label_id);
/* a statement following a label cannot be a source element
* (a function declaration).
*/
allow_source_elem = 0;
DUK_DDD(DUK_DDDPRINT("label handled, retry statement parsing"));
goto retry_parse;
}
stmt_flags = 0;
if (dir_prol_at_entry && /* still in prologue */
single_token && /* single string token */
comp_ctx->prev_token.t == DUK_TOK_STRING) {
/*
* Detected a directive
*/
duk_hstring *h_dir;
/* expected ival */
DUK_ASSERT(res->t == DUK_IVAL_PLAIN);
DUK_ASSERT(res->x1.t == DUK_ISPEC_VALUE);
DUK_ASSERT(DUK_TVAL_IS_STRING(duk_get_tval(ctx, res->x1.valstack_idx)));
h_dir = comp_ctx->prev_token.str1;
DUK_ASSERT(h_dir != NULL);
DUK_DDD(DUK_DDDPRINT("potential directive: %!O", h_dir));
stmt_flags |= DUK__STILL_PROLOGUE;
/* Note: escaped characters differentiate directives */
if (comp_ctx->prev_token.num_escapes > 0) {
DUK_DDD(DUK_DDDPRINT("directive contains escapes: valid directive "
"but we ignore such directives"));
} else {
/*
* The length comparisons are present to handle
* strings like "use strict\u0000foo" as required.
*/
if (DUK_HSTRING_GET_BYTELEN(h_dir) == 10 &&
DUK_STRNCMP((const char *) DUK_HSTRING_GET_DATA(h_dir), "use strict", 10) == 0) {
#if defined(DUK_USE_STRICT_DECL)
DUK_DDD(DUK_DDDPRINT("use strict directive detected: strict flag %ld -> %ld",
(long) comp_ctx->curr_func.is_strict, (long) 1));
comp_ctx->curr_func.is_strict = 1;
#else
DUK_DDD(DUK_DDDPRINT("use strict detected but strict declarations disabled, ignoring"));
#endif
} else if (DUK_HSTRING_GET_BYTELEN(h_dir) == 14 &&
DUK_STRNCMP((const char *) DUK_HSTRING_GET_DATA(h_dir), "use duk notail", 14) == 0) {
DUK_DDD(DUK_DDDPRINT("use duk notail directive detected: notail flag %ld -> %ld",
(long) comp_ctx->curr_func.is_notail, (long) 1));
comp_ctx->curr_func.is_notail = 1;
} else {
DUK_DD(DUK_DDPRINT("unknown directive: '%!O', ignoring but not terminating "
"directive prologue", (duk_hobject *) h_dir));
}
}
} else {
DUK_DDD(DUK_DDDPRINT("non-directive expression statement or no longer in prologue; "
"prologue terminated if still active"));
}
stmt_flags |= DUK__HAS_VAL | DUK__HAS_TERM;
}
} /* end switch (tok) */
/*
* Statement value handling.
*
* Global code and eval code has an implicit return value
* which comes from the last statement with a value
* (technically a non-"empty" continuation, which is
* different from an empty statement).
*
* Since we don't know whether a later statement will
* override the value of the current statement, we need
* to coerce the statement value to a register allocated
* for implicit return values. In other cases we need
* to coerce the statement value to a plain value to get
* any side effects out (consider e.g. "foo.bar;").
*/
/* XXX: what about statements which leave a half-cooked value in 'res'
* but have no stmt value? Any such statements?
*/
if (stmt_flags & DUK__HAS_VAL) {
duk_reg_t reg_stmt_value = comp_ctx->curr_func.reg_stmt_value;
if (reg_stmt_value >= 0) {
duk__ivalue_toforcedreg(comp_ctx, res, reg_stmt_value);
} else {
duk__ivalue_toplain_ignore(comp_ctx, res);
}
} else {
;
}
/*
* Statement terminator check, including automatic semicolon
* handling. After this step, 'curr_tok' should be the first
* token after a possible statement terminator.
*/
if (stmt_flags & DUK__HAS_TERM) {
if (comp_ctx->curr_token.t == DUK_TOK_SEMICOLON) {
DUK_DDD(DUK_DDDPRINT("explicit semicolon terminates statement"));
duk__advance(comp_ctx);
} else {
if (comp_ctx->curr_token.allow_auto_semi) {
DUK_DDD(DUK_DDDPRINT("automatic semicolon terminates statement"));
} else if (stmt_flags & DUK__ALLOW_AUTO_SEMI_ALWAYS) {
/* XXX: make this lenience dependent on flags or strictness? */
DUK_DDD(DUK_DDDPRINT("automatic semicolon terminates statement (allowed for compatibility "
"even though no lineterm present before next token)"));
} else {
DUK_ERROR_SYNTAX(thr, DUK_STR_UNTERMINATED_STMT);
}
}
} else {
DUK_DDD(DUK_DDDPRINT("statement has no terminator"));
}
/*
* Directive prologue tracking.
*/
if (stmt_flags & DUK__STILL_PROLOGUE) {
DUK_DDD(DUK_DDDPRINT("setting in_directive_prologue"));
comp_ctx->curr_func.in_directive_prologue = 1;
}
/*
* Cleanups (all statement parsing flows through here).
*
* Pop label site and reset labels. Reset 'next temp' to value at
* entry to reuse temps.
*/
if (label_id >= 0) {
duk__emit_extraop_bc(comp_ctx,
DUK_EXTRAOP_ENDLABEL,
(duk_regconst_t) label_id);
}
DUK__SETTEMP(comp_ctx, temp_at_entry);
duk__reset_labels_to_length(comp_ctx, labels_len_at_entry);
/* XXX: return indication of "terminalness" (e.g. a 'throw' is terminal) */
DUK__RECURSION_DECREASE(comp_ctx, thr);
}
#undef DUK__HAS_VAL
#undef DUK__HAS_TERM
#undef DUK__ALLOW_AUTO_SEMI_ALWAYS
/*
* Parse a statement list.
*
* Handles automatic semicolon insertion and implicit return value.
*
* Upon entry, 'curr_tok' should contain the first token of the first
* statement (parsed in the "allow regexp literal" mode). Upon exit,
* 'curr_tok' contains the token following the statement list terminator
* (EOF or closing brace).
*/
DUK_LOCAL void duk__parse_stmts(duk_compiler_ctx *comp_ctx, duk_bool_t allow_source_elem, duk_bool_t expect_eof) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_ivalue res_alloc;
duk_ivalue *res = &res_alloc;
/* Setup state. Initial ivalue is 'undefined'. */
duk_require_stack(ctx, DUK__PARSE_STATEMENTS_SLOTS);
/* XXX: 'res' setup can be moved to function body level; in fact, two 'res'
* intermediate values suffice for parsing of each function. Nesting is needed
* for nested functions (which may occur inside expressions).
*/
DUK_MEMZERO(&res_alloc, sizeof(res_alloc));
res->t = DUK_IVAL_PLAIN;
res->x1.t = DUK_ISPEC_VALUE;
res->x1.valstack_idx = duk_get_top(ctx);
res->x2.valstack_idx = res->x1.valstack_idx + 1;
duk_push_undefined(ctx);
duk_push_undefined(ctx);
/* Parse statements until a closing token (EOF or '}') is found. */
for (;;) {
/* Check whether statement list ends. */
if (expect_eof) {
if (comp_ctx->curr_token.t == DUK_TOK_EOF) {
break;
}
} else {
if (comp_ctx->curr_token.t == DUK_TOK_RCURLY) {
break;
}
}
/* Check statement type based on the first token type.
*
* Note: expression parsing helpers expect 'curr_tok' to
* contain the first token of the expression upon entry.
*/
DUK_DDD(DUK_DDDPRINT("TOKEN %ld (non-whitespace, non-comment)", (long) comp_ctx->curr_token.t));
duk__parse_stmt(comp_ctx, res, allow_source_elem);
}
duk__advance(comp_ctx);
/* Tear down state. */
duk_pop_2(ctx);
}
/*
* Declaration binding instantiation conceptually happens when calling a
* function; for us it essentially means that function prologue. The
* conceptual process is described in E5 Section 10.5.
*
* We need to keep track of all encountered identifiers to (1) create an
* identifier-to-register map ("varmap"); and (2) detect duplicate
* declarations. Identifiers which are not bound to registers still need
* to be tracked for detecting duplicates. Currently such identifiers
* are put into the varmap with a 'null' value, which is later cleaned up.
*
* To support functions with a large number of variable and function
* declarations, registers are not allocated beyond a certain limit;
* after that limit, variables and functions need slow path access.
* Arguments are currently always register bound, which imposes a hard
* (and relatively small) argument count limit.
*
* Some bindings in E5 are not configurable (= deletable) and almost all
* are mutable (writable). Exceptions are:
*
* - The 'arguments' binding, established only if no shadowing argument
* or function declaration exists. We handle 'arguments' creation
* and binding through an explicit slow path environment record.
*
* - The "name" binding for a named function expression. This is also
* handled through an explicit slow path environment record.
*/
/* XXX: add support for variables to not be register bound always, to
* handle cases with a very large number of variables?
*/
DUK_LOCAL void duk__init_varmap_and_prologue_for_pass2(duk_compiler_ctx *comp_ctx, duk_reg_t *out_stmt_value_reg) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_hstring *h_name;
duk_bool_t configurable_bindings;
duk_uarridx_t num_args;
duk_uarridx_t num_decls;
duk_regconst_t rc_name;
duk_small_uint_t declvar_flags;
duk_uarridx_t i;
#ifdef DUK_USE_ASSERTIONS
duk_idx_t entry_top;
#endif
#ifdef DUK_USE_ASSERTIONS
entry_top = duk_get_top(ctx);
#endif
/*
* Preliminaries
*/
configurable_bindings = comp_ctx->curr_func.is_eval;
DUK_DDD(DUK_DDDPRINT("configurable_bindings=%ld", (long) configurable_bindings));
/* varmap is already in comp_ctx->curr_func.varmap_idx */
/*
* Function formal arguments, always bound to registers
* (there's no support for shuffling them now).
*/
num_args = (duk_uarridx_t) duk_get_length(ctx, comp_ctx->curr_func.argnames_idx);
DUK_DDD(DUK_DDDPRINT("num_args=%ld", (long) num_args));
/* XXX: check num_args */
for (i = 0; i < num_args; i++) {
duk_get_prop_index(ctx, comp_ctx->curr_func.argnames_idx, i);
h_name = duk_get_hstring(ctx, -1);
DUK_ASSERT(h_name != NULL);
if (comp_ctx->curr_func.is_strict) {
if (duk__hstring_is_eval_or_arguments(comp_ctx, h_name)) {
DUK_DDD(DUK_DDDPRINT("arg named 'eval' or 'arguments' in strict mode -> SyntaxError"));
goto error_argname;
}
duk_dup_top(ctx);
if (duk_has_prop(ctx, comp_ctx->curr_func.varmap_idx)) {
DUK_DDD(DUK_DDDPRINT("duplicate arg name in strict mode -> SyntaxError"));
goto error_argname;
}
/* Ensure argument name is not a reserved word in current
* (final) strictness. Formal argument parsing may not
* catch reserved names if strictness changes during
* parsing.
*
* We only need to do this in strict mode because non-strict
* keyword are always detected in formal argument parsing.
*/
if (DUK_HSTRING_HAS_STRICT_RESERVED_WORD(h_name)) {
goto error_argname;
}
}
/* overwrite any previous binding of the same name; the effect is
* that last argument of a certain name wins.
*/
/* only functions can have arguments */
DUK_ASSERT(comp_ctx->curr_func.is_function);
duk_push_uarridx(ctx, i); /* -> [ ... name index ] */
duk_put_prop(ctx, comp_ctx->curr_func.varmap_idx); /* -> [ ... ] */
/* no code needs to be emitted, the regs already have values */
}
/* use temp_next for tracking register allocations */
DUK__SETTEMP_CHECKMAX(comp_ctx, (duk_reg_t) num_args);
/*
* After arguments, allocate special registers (like shuffling temps)
*/
if (out_stmt_value_reg) {
*out_stmt_value_reg = DUK__ALLOCTEMP(comp_ctx);
}
if (comp_ctx->curr_func.needs_shuffle) {
duk_reg_t shuffle_base = DUK__ALLOCTEMPS(comp_ctx, 3);
comp_ctx->curr_func.shuffle1 = shuffle_base;
comp_ctx->curr_func.shuffle2 = shuffle_base + 1;
comp_ctx->curr_func.shuffle3 = shuffle_base + 2;
DUK_D(DUK_DPRINT("shuffle registers needed by function, allocated: %ld %ld %ld",
(long) comp_ctx->curr_func.shuffle1,
(long) comp_ctx->curr_func.shuffle2,
(long) comp_ctx->curr_func.shuffle3));
}
if (comp_ctx->curr_func.temp_next > 0x100) {
DUK_D(DUK_DPRINT("not enough 8-bit regs: temp_next=%ld", (long) comp_ctx->curr_func.temp_next));
goto error_outofregs;
}
/*
* Function declarations
*/
num_decls = (duk_uarridx_t) duk_get_length(ctx, comp_ctx->curr_func.decls_idx);
DUK_DDD(DUK_DDDPRINT("num_decls=%ld -> %!T",
(long) num_decls,
(duk_tval *) duk_get_tval(ctx, comp_ctx->curr_func.decls_idx)));
for (i = 0; i < num_decls; i += 2) {
duk_int_t decl_type;
duk_int_t fnum;
duk_get_prop_index(ctx, comp_ctx->curr_func.decls_idx, i + 1); /* decl type */
decl_type = duk_to_int(ctx, -1);
fnum = decl_type >> 8; /* XXX: macros */
decl_type = decl_type & 0xff;
duk_pop(ctx);
if (decl_type != DUK_DECL_TYPE_FUNC) {
continue;
}
duk_get_prop_index(ctx, comp_ctx->curr_func.decls_idx, i); /* decl name */
/* XXX: spilling */
if (comp_ctx->curr_func.is_function) {
duk_reg_t reg_bind;
duk_dup_top(ctx);
if (duk_has_prop(ctx, comp_ctx->curr_func.varmap_idx)) {
/* shadowed; update value */
duk_dup_top(ctx);
duk_get_prop(ctx, comp_ctx->curr_func.varmap_idx);
reg_bind = duk_to_int(ctx, -1); /* [ ... name reg_bind ] */
duk__emit_a_bc(comp_ctx,
DUK_OP_CLOSURE,
(duk_regconst_t) reg_bind,
(duk_regconst_t) fnum);
} else {
/* function: always register bound */
reg_bind = DUK__ALLOCTEMP(comp_ctx);
duk__emit_a_bc(comp_ctx,
DUK_OP_CLOSURE,
(duk_regconst_t) reg_bind,
(duk_regconst_t) fnum);
duk_push_int(ctx, (duk_int_t) reg_bind);
}
} else {
/* Function declaration for global/eval code is emitted even
* for duplicates, because of E5 Section 10.5, step 5.e of
* E5.1 (special behavior for variable bound to global object).
*
* DECLVAR will not re-declare a variable as such, but will
* update the binding value.
*/
duk_reg_t reg_temp = DUK__ALLOCTEMP(comp_ctx);
duk_dup_top(ctx);
rc_name = duk__getconst(comp_ctx);
duk_push_null(ctx);
duk__emit_a_bc(comp_ctx,
DUK_OP_CLOSURE,
(duk_regconst_t) reg_temp,
(duk_regconst_t) fnum);
declvar_flags = DUK_PROPDESC_FLAG_WRITABLE |
DUK_PROPDESC_FLAG_ENUMERABLE |
DUK_BC_DECLVAR_FLAG_FUNC_DECL;
if (configurable_bindings) {
declvar_flags |= DUK_PROPDESC_FLAG_CONFIGURABLE;
}
duk__emit_a_b_c(comp_ctx,
DUK_OP_DECLVAR | DUK__EMIT_FLAG_NO_SHUFFLE_A,
(duk_regconst_t) declvar_flags /*flags*/,
rc_name /*name*/,
(duk_regconst_t) reg_temp /*value*/);
DUK__SETTEMP(comp_ctx, reg_temp); /* forget temp */
}
DUK_DDD(DUK_DDDPRINT("function declaration to varmap: %!T -> %!T",
(duk_tval *) duk_get_tval(ctx, -2),
(duk_tval *) duk_get_tval(ctx, -1)));
duk_put_prop(ctx, comp_ctx->curr_func.varmap_idx); /* [ ... name reg/null ] -> [ ... ] */
}
/*
* 'arguments' binding is special; if a shadowing argument or
* function declaration exists, an arguments object will
* definitely not be needed, regardless of whether the identifier
* 'arguments' is referenced inside the function body.
*/
if (duk_has_prop_stridx(ctx, comp_ctx->curr_func.varmap_idx, DUK_STRIDX_LC_ARGUMENTS)) {
DUK_DDD(DUK_DDDPRINT("'arguments' is shadowed by argument or function declaration "
"-> arguments object creation can be skipped"));
comp_ctx->curr_func.is_arguments_shadowed = 1;
}
/*
* Variable declarations.
*
* Unlike function declarations, variable declaration values don't get
* assigned on entry. If a binding of the same name already exists, just
* ignore it silently.
*/
for (i = 0; i < num_decls; i += 2) {
duk_int_t decl_type;
duk_get_prop_index(ctx, comp_ctx->curr_func.decls_idx, i + 1); /* decl type */
decl_type = duk_to_int(ctx, -1);
decl_type = decl_type & 0xff;
duk_pop(ctx);
if (decl_type != DUK_DECL_TYPE_VAR) {
continue;
}
duk_get_prop_index(ctx, comp_ctx->curr_func.decls_idx, i); /* decl name */
if (duk_has_prop(ctx, comp_ctx->curr_func.varmap_idx)) {
/* shadowed, ignore */
} else {
duk_get_prop_index(ctx, comp_ctx->curr_func.decls_idx, i); /* decl name */
h_name = duk_get_hstring(ctx, -1);
DUK_ASSERT(h_name != NULL);
if (h_name == DUK_HTHREAD_STRING_LC_ARGUMENTS(thr) &&
!comp_ctx->curr_func.is_arguments_shadowed) {
/* E5 Section steps 7-8 */
DUK_DDD(DUK_DDDPRINT("'arguments' not shadowed by a function declaration, "
"but appears as a variable declaration -> treat as "
"a no-op for variable declaration purposes"));
duk_pop(ctx);
continue;
}
/* XXX: spilling */
if (comp_ctx->curr_func.is_function) {
duk_reg_t reg_bind = DUK__ALLOCTEMP(comp_ctx);
/* no need to init reg, it will be undefined on entry */
duk_push_int(ctx, (duk_int_t) reg_bind);
} else {
duk_dup_top(ctx);
rc_name = duk__getconst(comp_ctx);
duk_push_null(ctx);
declvar_flags = DUK_PROPDESC_FLAG_WRITABLE |
DUK_PROPDESC_FLAG_ENUMERABLE |
DUK_BC_DECLVAR_FLAG_UNDEF_VALUE;
if (configurable_bindings) {
declvar_flags |= DUK_PROPDESC_FLAG_CONFIGURABLE;
}
duk__emit_a_b_c(comp_ctx,
DUK_OP_DECLVAR | DUK__EMIT_FLAG_NO_SHUFFLE_A,
(duk_regconst_t) declvar_flags /*flags*/,
rc_name /*name*/,
(duk_regconst_t) 0 /*value*/);
}
duk_put_prop(ctx, comp_ctx->curr_func.varmap_idx); /* [ ... name reg/null ] -> [ ... ] */
}
}
/*
* Wrap up
*/
DUK_DDD(DUK_DDDPRINT("varmap: %!T, is_arguments_shadowed=%ld",
(duk_tval *) duk_get_tval(ctx, comp_ctx->curr_func.varmap_idx),
(long) comp_ctx->curr_func.is_arguments_shadowed));
DUK_ASSERT_TOP(ctx, entry_top);
return;
error_outofregs:
DUK_ERROR_RANGE(thr, DUK_STR_REG_LIMIT);
DUK_UNREACHABLE();
return;
error_argname:
DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_ARG_NAME);
DUK_UNREACHABLE();
return;
}
/*
* Parse a function-body-like expression (FunctionBody or Program
* in E5 grammar) using a two-pass parse. The productions appear
* in the following contexts:
*
* - function expression
* - function statement
* - function declaration
* - getter in object literal
* - setter in object literal
* - global code
* - eval code
* - Function constructor body
*
* This function only parses the statement list of the body; the argument
* list and possible function name must be initialized by the caller.
* For instance, for Function constructor, the argument names are originally
* on the value stack. The parsing of statements ends either at an EOF or
* a closing brace; this is controlled by an input flag.
*
* Note that there are many differences affecting parsing and even code
* generation:
*
* - Global and eval code have an implicit return value generated
* by the last statement; function code does not
*
* - Global code, eval code, and Function constructor body end in
* an EOF, other bodies in a closing brace ('}')
*
* Upon entry, 'curr_tok' is ignored and the function will pull in the
* first token on its own. Upon exit, 'curr_tok' is the terminating
* token (EOF or closing brace).
*/
DUK_LOCAL void duk__parse_func_body(duk_compiler_ctx *comp_ctx, duk_bool_t expect_eof, duk_bool_t implicit_return_value, duk_small_int_t expect_token) {
duk_compiler_func *func;
duk_hthread *thr;
duk_context *ctx;
duk_reg_t reg_stmt_value = -1;
duk_lexer_point lex_pt;
duk_reg_t temp_first;
duk_small_int_t compile_round = 1;
DUK_ASSERT(comp_ctx != NULL);
thr = comp_ctx->thr;
ctx = (duk_context *) thr;
DUK_ASSERT(thr != NULL);
func = &comp_ctx->curr_func;
DUK_ASSERT(func != NULL);
DUK__RECURSION_INCREASE(comp_ctx, thr);
duk_require_stack(ctx, DUK__FUNCTION_BODY_REQUIRE_SLOTS);
/*
* Store lexer position for a later rewind
*/
DUK_LEXER_GETPOINT(&comp_ctx->lex, &lex_pt);
/*
* Program code (global and eval code) has an implicit return value
* from the last statement value (e.g. eval("1; 2+3;") returns 3).
* This is not the case with functions. If implicit statement return
* value is requested, all statements are coerced to a register
* allocated here, and used in the implicit return statement below.
*/
/* XXX: this is pointless here because pass 1 is throw-away */
if (implicit_return_value) {
reg_stmt_value = DUK__ALLOCTEMP(comp_ctx);
/* If an implicit return value is needed by caller, it must be
* initialized to 'undefined' because we don't know whether any
* non-empty (where "empty" is a continuation type, and different
* from an empty statement) statements will be executed.
*
* However, since 1st pass is a throwaway one, no need to emit
* it here.
*/
#if 0
duk__emit_extraop_bc(comp_ctx,
DUK_EXTRAOP_LDUNDEF,
0);
#endif
}
/*
* First pass.
*
* Gather variable/function declarations needed for second pass.
* Code generated is dummy and discarded.
*/
func->in_directive_prologue = 1;
func->in_scanning = 1;
func->may_direct_eval = 0;
func->id_access_arguments = 0;
func->id_access_slow = 0;
func->reg_stmt_value = reg_stmt_value;
#if defined(DUK_USE_DEBUGGER_SUPPORT)
func->min_line = DUK_INT_MAX;
func->max_line = 0;
#endif
/* duk__parse_stmts() expects curr_tok to be set; parse in "allow regexp literal" mode with current strictness */
if (expect_token >= 0) {
/* Eating a left curly; regexp mode is allowed by left curly
* based on duk__token_lbp[] automatically.
*/
DUK_ASSERT(expect_token == DUK_TOK_LCURLY);
duk__update_lineinfo_currtoken(comp_ctx);
duk__advance_expect(comp_ctx, expect_token);
} else {
/* Need to set curr_token.t because lexing regexp mode depends on current
* token type. Zero value causes "allow regexp" mode.
*/
comp_ctx->curr_token.t = 0;
duk__advance(comp_ctx);
}
DUK_DDD(DUK_DDDPRINT("begin 1st pass"));
duk__parse_stmts(comp_ctx,
1, /* allow source elements */
expect_eof); /* expect EOF instead of } */
DUK_DDD(DUK_DDDPRINT("end 1st pass"));
/*
* Second (and possibly third) pass.
*
* Generate actual code. In most cases the need for shuffle
* registers is detected during pass 1, but in some corner cases
* we'll only detect it during pass 2 and a third pass is then
* needed (see GH-115).
*/
for (;;) {
duk_bool_t needs_shuffle_before = comp_ctx->curr_func.needs_shuffle;
compile_round++;
/*
* Rewind lexer.
*
* duk__parse_stmts() expects curr_tok to be set; parse in "allow regexp
* literal" mode with current strictness.
*
* curr_token line number info should be initialized for pass 2 before
* generating prologue, to ensure prologue bytecode gets nice line numbers.
*/
DUK_DDD(DUK_DDDPRINT("rewind lexer"));
DUK_LEXER_SETPOINT(&comp_ctx->lex, &lex_pt);
comp_ctx->curr_token.t = 0; /* this is needed for regexp mode */
comp_ctx->curr_token.start_line = 0; /* needed for line number tracking (becomes prev_token.start_line) */
duk__advance(comp_ctx);
/*
* Reset function state and perform register allocation, which creates
* 'varmap' for second pass. Function prologue for variable declarations,
* binding value initializations etc is emitted as a by-product.
*
* Strict mode restrictions for duplicate and invalid argument
* names are checked here now that we know whether the function
* is actually strict. See: test-dev-strict-mode-boundary.js.
*
* Inner functions are compiled during pass 1 and are not reset.
*/
duk__reset_func_for_pass2(comp_ctx);
func->in_directive_prologue = 1;
func->in_scanning = 0;
/* must be able to emit code, alloc consts, etc. */
duk__init_varmap_and_prologue_for_pass2(comp_ctx,
(implicit_return_value ? &reg_stmt_value : NULL));
func->reg_stmt_value = reg_stmt_value;
temp_first = DUK__GETTEMP(comp_ctx);
func->temp_first = temp_first;
func->temp_next = temp_first;
func->stmt_next = 0;
func->label_next = 0;
/* XXX: init or assert catch depth etc -- all values */
func->id_access_arguments = 0;
func->id_access_slow = 0;
/*
* Check function name validity now that we know strictness.
* This only applies to function declarations and expressions,
* not setter/getter name.
*
* See: test-dev-strict-mode-boundary.js
*/
if (func->is_function && !func->is_setget && func->h_name != NULL) {
if (func->is_strict) {
if (duk__hstring_is_eval_or_arguments(comp_ctx, func->h_name)) {
DUK_DDD(DUK_DDDPRINT("func name is 'eval' or 'arguments' in strict mode"));
goto error_funcname;
}
if (DUK_HSTRING_HAS_STRICT_RESERVED_WORD(func->h_name)) {
DUK_DDD(DUK_DDDPRINT("func name is a reserved word in strict mode"));
goto error_funcname;
}
} else {
if (DUK_HSTRING_HAS_RESERVED_WORD(func->h_name) &&
!DUK_HSTRING_HAS_STRICT_RESERVED_WORD(func->h_name)) {
DUK_DDD(DUK_DDDPRINT("func name is a reserved word in non-strict mode"));
goto error_funcname;
}
}
}
/*
* Second pass parsing.
*/
if (implicit_return_value) {
/* Default implicit return value. */
duk__emit_extraop_bc(comp_ctx,
DUK_EXTRAOP_LDUNDEF,
0);
}
DUK_DDD(DUK_DDDPRINT("begin 2nd pass"));
duk__parse_stmts(comp_ctx,
1, /* allow source elements */
expect_eof); /* expect EOF instead of } */
DUK_DDD(DUK_DDDPRINT("end 2nd pass"));
duk__update_lineinfo_currtoken(comp_ctx);
if (needs_shuffle_before == comp_ctx->curr_func.needs_shuffle) {
/* Shuffle decision not changed. */
break;
}
if (compile_round >= 3) {
/* Should never happen but avoid infinite loop just in case. */
DUK_D(DUK_DPRINT("more than 3 compile passes needed, should never happen"));
DUK_ERROR_INTERNAL_DEFMSG(thr);
}
DUK_D(DUK_DPRINT("need additional round to compile function, round now %d", (int) compile_round));
}
/*
* Emit a final RETURN.
*
* It would be nice to avoid emitting an unnecessary "return" opcode
* if the current PC is not reachable. However, this cannot be reliably
* detected; even if the previous instruction is an unconditional jump,
* there may be a previous jump which jumps to current PC (which is the
* case for iteration and conditional statements, for instance).
*/
/* XXX: request a "last statement is terminal" from duk__parse_stmt() and duk__parse_stmts();
* we could avoid the last RETURN if we could ensure there is no way to get here
* (directly or via a jump)
*/
DUK_ASSERT(comp_ctx->curr_func.catch_depth == 0);
if (reg_stmt_value >= 0) {
duk__emit_a_b(comp_ctx,
DUK_OP_RETURN | DUK__EMIT_FLAG_NO_SHUFFLE_A,
(duk_regconst_t) DUK_BC_RETURN_FLAG_HAVE_RETVAL /*flags*/,
(duk_regconst_t) reg_stmt_value /*reg*/);
} else {
duk__emit_a_b(comp_ctx,
DUK_OP_RETURN | DUK__EMIT_FLAG_NO_SHUFFLE_A,
(duk_regconst_t) 0 /*flags*/,
(duk_regconst_t) 0 /*reg(ignored)*/);
}
/*
* Peephole optimize JUMP chains.
*/
duk__peephole_optimize_bytecode(comp_ctx);
/*
* comp_ctx->curr_func is now ready to be converted into an actual
* function template.
*/
DUK__RECURSION_DECREASE(comp_ctx, thr);
return;
error_funcname:
DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_FUNC_NAME);
}
/*
* Parse a function-like expression:
*
* - function expression
* - function declaration
* - function statement (non-standard)
* - setter/getter
*
* Adds the function to comp_ctx->curr_func function table and returns the
* function number.
*
* On entry, curr_token points to:
*
* - the token after 'function' for function expression/declaration/statement
* - the token after 'set' or 'get' for setter/getter
*/
/* Parse formals. */
DUK_LOCAL void duk__parse_func_formals(duk_compiler_ctx *comp_ctx) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_bool_t first = 1;
duk_uarridx_t n;
for (;;) {
if (comp_ctx->curr_token.t == DUK_TOK_RPAREN) {
break;
}
if (first) {
/* no comma */
first = 0;
} else {
duk__advance_expect(comp_ctx, DUK_TOK_COMMA);
}
/* Note: when parsing a formal list in non-strict context, e.g.
* "implements" is parsed as an identifier. When the function is
* later detected to be strict, the argument list must be rechecked
* against a larger set of reserved words (that of strict mode).
* This is handled by duk__parse_func_body(). Here we recognize
* whatever tokens are considered reserved in current strictness
* (which is not always enough).
*/
if (comp_ctx->curr_token.t != DUK_TOK_IDENTIFIER) {
DUK_ERROR_SYNTAX(thr, "expected identifier");
}
DUK_ASSERT(comp_ctx->curr_token.t == DUK_TOK_IDENTIFIER);
DUK_ASSERT(comp_ctx->curr_token.str1 != NULL);
DUK_DDD(DUK_DDDPRINT("formal argument: %!O",
(duk_heaphdr *) comp_ctx->curr_token.str1));
/* XXX: append primitive */
duk_push_hstring(ctx, comp_ctx->curr_token.str1);
n = (duk_uarridx_t) duk_get_length(ctx, comp_ctx->curr_func.argnames_idx);
duk_put_prop_index(ctx, comp_ctx->curr_func.argnames_idx, n);
duk__advance(comp_ctx); /* eat identifier */
}
}
/* Parse a function-like expression, assuming that 'comp_ctx->curr_func' is
* correctly set up. Assumes that curr_token is just after 'function' (or
* 'set'/'get' etc).
*/
DUK_LOCAL void duk__parse_func_like_raw(duk_compiler_ctx *comp_ctx, duk_bool_t is_decl, duk_bool_t is_setget) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
DUK_ASSERT(comp_ctx->curr_func.num_formals == 0);
DUK_ASSERT(comp_ctx->curr_func.is_function == 1);
DUK_ASSERT(comp_ctx->curr_func.is_eval == 0);
DUK_ASSERT(comp_ctx->curr_func.is_global == 0);
DUK_ASSERT(comp_ctx->curr_func.is_setget == is_setget);
DUK_ASSERT(comp_ctx->curr_func.is_decl == is_decl);
duk__update_lineinfo_currtoken(comp_ctx);
/*
* Function name (if any)
*
* We don't check for prohibited names here, because we don't
* yet know whether the function will be strict. Function body
* parsing handles this retroactively.
*
* For function expressions and declarations function name must
* be an Identifer (excludes reserved words). For setter/getter
* it is a PropertyName which allows reserved words and also
* strings and numbers (e.g. "{ get 1() { ... } }").
*/
if (is_setget) {
/* PropertyName -> IdentifierName | StringLiteral | NumericLiteral */
if (comp_ctx->curr_token.t_nores == DUK_TOK_IDENTIFIER ||
comp_ctx->curr_token.t == DUK_TOK_STRING) {
duk_push_hstring(ctx, comp_ctx->curr_token.str1); /* keep in valstack */
} else if (comp_ctx->curr_token.t == DUK_TOK_NUMBER) {
duk_push_number(ctx, comp_ctx->curr_token.num);
duk_to_string(ctx, -1);
} else {
DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_GETSET_NAME);
}
comp_ctx->curr_func.h_name = duk_get_hstring(ctx, -1); /* borrowed reference */
DUK_ASSERT(comp_ctx->curr_func.h_name != NULL);
duk__advance(comp_ctx);
} else {
/* Function name is an Identifier (not IdentifierName), but we get
* the raw name (not recognizing keywords) here and perform the name
* checks only after pass 1.
*/
if (comp_ctx->curr_token.t_nores == DUK_TOK_IDENTIFIER) {
duk_push_hstring(ctx, comp_ctx->curr_token.str1); /* keep in valstack */
comp_ctx->curr_func.h_name = duk_get_hstring(ctx, -1); /* borrowed reference */
DUK_ASSERT(comp_ctx->curr_func.h_name != NULL);
duk__advance(comp_ctx);
} else {
/* valstack will be unbalanced, which is OK */
DUK_ASSERT(!is_setget);
if (is_decl) {
DUK_ERROR_SYNTAX(thr, DUK_STR_FUNC_NAME_REQUIRED);
}
}
}
DUK_DDD(DUK_DDDPRINT("function name: %!O",
(duk_heaphdr *) comp_ctx->curr_func.h_name));
/*
* Formal argument list
*
* We don't check for prohibited names or for duplicate argument
* names here, becase we don't yet know whether the function will
* be strict. Function body parsing handles this retroactively.
*/
duk__advance_expect(comp_ctx, DUK_TOK_LPAREN);
duk__parse_func_formals(comp_ctx);
DUK_ASSERT(comp_ctx->curr_token.t == DUK_TOK_RPAREN);
duk__advance(comp_ctx);
/*
* Parse function body
*/
duk__parse_func_body(comp_ctx,
0, /* expect_eof */
0, /* implicit_return_value */
DUK_TOK_LCURLY); /* expect_token */
/*
* Convert duk_compiler_func to a function template and add it
* to the parent function table.
*/
duk__convert_to_func_template(comp_ctx, is_setget /*force_no_namebind*/); /* -> [ ... func ] */
}
/* Parse an inner function, adding the function template to the current function's
* function table. Return a function number to be used by the outer function.
*
* Avoiding O(depth^2) inner function parsing is handled here. On the first pass,
* compile and register the function normally into the 'funcs' array, also recording
* a lexer point (offset/line) to the closing brace of the function. On the second
* pass, skip the function and return the same 'fnum' as on the first pass by using
* a running counter.
*
* An unfortunate side effect of this is that when parsing the inner function, almost
* nothing is known of the outer function, i.e. the inner function's scope. We don't
* need that information at the moment, but it would allow some optimizations if it
* were used.
*/
DUK_LOCAL duk_int_t duk__parse_func_like_fnum(duk_compiler_ctx *comp_ctx, duk_bool_t is_decl, duk_bool_t is_setget) {
duk_hthread *thr = comp_ctx->thr;
duk_context *ctx = (duk_context *) thr;
duk_compiler_func old_func;
duk_idx_t entry_top;
duk_int_t fnum;
/*
* On second pass, skip the function.
*/
if (!comp_ctx->curr_func.in_scanning) {
duk_lexer_point lex_pt;
fnum = comp_ctx->curr_func.fnum_next++;
duk_get_prop_index(ctx, comp_ctx->curr_func.funcs_idx, (duk_uarridx_t) (fnum * 3 + 1));
lex_pt.offset = duk_to_int(ctx, -1);
duk_pop(ctx);
duk_get_prop_index(ctx, comp_ctx->curr_func.funcs_idx, (duk_uarridx_t) (fnum * 3 + 2));
lex_pt.line = duk_to_int(ctx, -1);
duk_pop(ctx);
DUK_DDD(DUK_DDDPRINT("second pass of an inner func, skip the function, reparse closing brace; lex offset=%ld, line=%ld",
(long) lex_pt.offset, (long) lex_pt.line));
DUK_LEXER_SETPOINT(&comp_ctx->lex, &lex_pt);
comp_ctx->curr_token.t = 0; /* this is needed for regexp mode */
comp_ctx->curr_token.start_line = 0; /* needed for line number tracking (becomes prev_token.start_line) */
duk__advance(comp_ctx);
duk__advance_expect(comp_ctx, DUK_TOK_RCURLY);
return fnum;
}
/*
* On first pass, perform actual parsing. Remember valstack top on entry
* to restore it later, and switch to using a new function in comp_ctx.
*/
entry_top = duk_get_top(ctx);
DUK_DDD(DUK_DDDPRINT("before func: entry_top=%ld, curr_tok.start_offset=%ld",
(long) entry_top, (long) comp_ctx->curr_token.start_offset));
DUK_MEMCPY(&old_func, &comp_ctx->curr_func, sizeof(duk_compiler_func));
DUK_MEMZERO(&comp_ctx->curr_func, sizeof(duk_compiler_func));
duk__init_func_valstack_slots(comp_ctx);
DUK_ASSERT(comp_ctx->curr_func.num_formals == 0);
/* inherit initial strictness from parent */
comp_ctx->curr_func.is_strict = old_func.is_strict;
DUK_ASSERT(comp_ctx->curr_func.is_notail == 0);
comp_ctx->curr_func.is_function = 1;
DUK_ASSERT(comp_ctx->curr_func.is_eval == 0);
DUK_ASSERT(comp_ctx->curr_func.is_global == 0);
comp_ctx->curr_func.is_setget = is_setget;
comp_ctx->curr_func.is_decl = is_decl;
/*
* Parse inner function
*/
duk__parse_func_like_raw(comp_ctx, is_decl, is_setget); /* pushes function template */
/* prev_token.start_offset points to the closing brace here; when skipping
* we're going to reparse the closing brace to ensure semicolon insertion
* etc work as expected.
*/
DUK_DDD(DUK_DDDPRINT("after func: prev_tok.start_offset=%ld, curr_tok.start_offset=%ld",
(long) comp_ctx->prev_token.start_offset, (long) comp_ctx->curr_token.start_offset));
DUK_ASSERT(comp_ctx->lex.input[comp_ctx->prev_token.start_offset] == (duk_uint8_t) DUK_ASC_RCURLY);
/* XXX: append primitive */
DUK_ASSERT(duk_get_length(ctx, old_func.funcs_idx) == (duk_size_t) (old_func.fnum_next * 3));
fnum = old_func.fnum_next++;
if (fnum > DUK__MAX_FUNCS) {
DUK_ERROR_RANGE(comp_ctx->thr, DUK_STR_FUNC_LIMIT);
}
/* array writes autoincrement length */
(void) duk_put_prop_index(ctx, old_func.funcs_idx, (duk_uarridx_t) (fnum * 3));
duk_push_size_t(ctx, comp_ctx->prev_token.start_offset);
(void) duk_put_prop_index(ctx, old_func.funcs_idx, (duk_uarridx_t) (fnum * 3 + 1));
duk_push_int(ctx, comp_ctx->prev_token.start_line);
(void) duk_put_prop_index(ctx, old_func.funcs_idx, (duk_uarridx_t) (fnum * 3 + 2));
/*
* Cleanup: restore original function, restore valstack state.
*/
DUK_MEMCPY((void *) &comp_ctx->curr_func, (void *) &old_func, sizeof(duk_compiler_func));
duk_set_top(ctx, entry_top);
DUK_ASSERT_TOP(ctx, entry_top);
return fnum;
}
/*
* Compile input string into an executable function template without
* arguments.
*
* The string is parsed as the "Program" production of Ecmascript E5.
* Compilation context can be either global code or eval code (see E5
* Sections 14 and 15.1.2.1).
*
* Input stack: [ ... filename ]
* Output stack: [ ... func_template ]
*/
/* XXX: source code property */
DUK_LOCAL duk_ret_t duk__js_compile_raw(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hstring *h_filename;
duk__compiler_stkstate *comp_stk;
duk_compiler_ctx *comp_ctx;
duk_lexer_point *lex_pt;
duk_compiler_func *func;
duk_idx_t entry_top;
duk_bool_t is_strict;
duk_bool_t is_eval;
duk_bool_t is_funcexpr;
duk_small_uint_t flags;
DUK_ASSERT(thr != NULL);
/*
* Arguments check
*/
entry_top = duk_get_top(ctx);
DUK_ASSERT(entry_top >= 2);
comp_stk = (duk__compiler_stkstate *) duk_require_pointer(ctx, -1);
comp_ctx = &comp_stk->comp_ctx_alloc;
lex_pt = &comp_stk->lex_pt_alloc;
DUK_ASSERT(comp_ctx != NULL);
DUK_ASSERT(lex_pt != NULL);
flags = comp_stk->flags;
is_eval = (flags & DUK_JS_COMPILE_FLAG_EVAL ? 1 : 0);
is_strict = (flags & DUK_JS_COMPILE_FLAG_STRICT ? 1 : 0);
is_funcexpr = (flags & DUK_JS_COMPILE_FLAG_FUNCEXPR ? 1 : 0);
h_filename = duk_get_hstring(ctx, -2); /* may be undefined */
/*
* Init compiler and lexer contexts
*/
func = &comp_ctx->curr_func;
#ifdef DUK_USE_EXPLICIT_NULL_INIT
comp_ctx->thr = NULL;
comp_ctx->h_filename = NULL;
comp_ctx->prev_token.str1 = NULL;
comp_ctx->prev_token.str2 = NULL;
comp_ctx->curr_token.str1 = NULL;
comp_ctx->curr_token.str2 = NULL;
#endif
duk_require_stack(ctx, DUK__COMPILE_ENTRY_SLOTS);
duk_push_dynamic_buffer(ctx, 0); /* entry_top + 0 */
duk_push_undefined(ctx); /* entry_top + 1 */
duk_push_undefined(ctx); /* entry_top + 2 */
duk_push_undefined(ctx); /* entry_top + 3 */
duk_push_undefined(ctx); /* entry_top + 4 */
comp_ctx->thr = thr;
comp_ctx->h_filename = h_filename;
comp_ctx->tok11_idx = entry_top + 1;
comp_ctx->tok12_idx = entry_top + 2;
comp_ctx->tok21_idx = entry_top + 3;
comp_ctx->tok22_idx = entry_top + 4;
comp_ctx->recursion_limit = DUK_USE_COMPILER_RECLIMIT;
/* comp_ctx->lex has been pre-initialized by caller: it has been
* zeroed and input/input_length has been set.
*/
comp_ctx->lex.thr = thr;
/* comp_ctx->lex.input and comp_ctx->lex.input_length filled by caller */
comp_ctx->lex.slot1_idx = comp_ctx->tok11_idx;
comp_ctx->lex.slot2_idx = comp_ctx->tok12_idx;
comp_ctx->lex.buf_idx = entry_top + 0;
comp_ctx->lex.buf = (duk_hbuffer_dynamic *) duk_get_hbuffer(ctx, entry_top + 0);
DUK_ASSERT(comp_ctx->lex.buf != NULL);
DUK_ASSERT(DUK_HBUFFER_HAS_DYNAMIC(comp_ctx->lex.buf) && !DUK_HBUFFER_HAS_EXTERNAL(comp_ctx->lex.buf));
comp_ctx->lex.token_limit = DUK_COMPILER_TOKEN_LIMIT;
lex_pt->offset = 0;
lex_pt->line = 1;
DUK_LEXER_SETPOINT(&comp_ctx->lex, lex_pt); /* fills window */
comp_ctx->curr_token.start_line = 0; /* needed for line number tracking (becomes prev_token.start_line) */
/*
* Initialize function state for a zero-argument function
*/
duk__init_func_valstack_slots(comp_ctx);
DUK_ASSERT(func->num_formals == 0);
if (is_funcexpr) {
/* Name will be filled from function expression, not by caller.
* This case is used by Function constructor and duk_compile()
* API with the DUK_COMPILE_FUNCTION option.
*/
DUK_ASSERT(func->h_name == NULL);
} else {
duk_push_hstring_stridx(ctx, (is_eval ? DUK_STRIDX_EVAL :
DUK_STRIDX_GLOBAL));
func->h_name = duk_get_hstring(ctx, -1);
}
/*
* Parse a function body or a function-like expression, depending
* on flags.
*/
func->is_strict = is_strict;
func->is_setget = 0;
func->is_decl = 0;
if (is_funcexpr) {
func->is_function = 1;
func->is_eval = 0;
func->is_global = 0;
duk__advance(comp_ctx); /* init 'curr_token' */
duk__advance_expect(comp_ctx, DUK_TOK_FUNCTION);
(void) duk__parse_func_like_raw(comp_ctx,
0, /* is_decl */
0); /* is_setget */
} else {
func->is_function = 0;
func->is_eval = is_eval;
func->is_global = !is_eval;
duk__parse_func_body(comp_ctx,
1, /* expect_eof */
1, /* implicit_return_value */
-1); /* expect_token */
}
/*
* Convert duk_compiler_func to a function template
*/
duk__convert_to_func_template(comp_ctx, 0 /*force_no_namebind*/);
/*
* Wrapping duk_safe_call() will mangle the stack, just return stack top
*/
/* [ ... filename (temps) func ] */
return 1;
}
DUK_INTERNAL void duk_js_compile(duk_hthread *thr, const duk_uint8_t *src_buffer, duk_size_t src_length, duk_small_uint_t flags) {
duk_context *ctx = (duk_context *) thr;
duk__compiler_stkstate comp_stk;
duk_compiler_ctx *prev_ctx;
duk_ret_t safe_rc;
/* XXX: this illustrates that a C catchpoint implemented using duk_safe_call()
* is a bit heavy at the moment. The wrapper compiles to ~180 bytes on x64.
* Alternatives would be nice.
*/
DUK_ASSERT(thr != NULL);
DUK_ASSERT(src_buffer != NULL);
/* preinitialize lexer state partially */
DUK_MEMZERO(&comp_stk, sizeof(comp_stk));
comp_stk.flags = flags;
DUK_LEXER_INITCTX(&comp_stk.comp_ctx_alloc.lex);
comp_stk.comp_ctx_alloc.lex.input = src_buffer;
comp_stk.comp_ctx_alloc.lex.input_length = src_length;
duk_push_pointer(ctx, (void *) &comp_stk);
/* [ ... filename &comp_stk ] */
prev_ctx = thr->compile_ctx;
thr->compile_ctx = &comp_stk.comp_ctx_alloc; /* for duk_error_augment.c */
safe_rc = duk_safe_call(ctx, duk__js_compile_raw, 2 /*nargs*/, 1 /*nret*/);
thr->compile_ctx = prev_ctx; /* must restore reliably before returning */
if (safe_rc != DUK_EXEC_SUCCESS) {
duk_throw(ctx);
}
/* [ ... template ] */
}
#line 1 "duk_js_executor.c"
/*
* Ecmascript bytecode executor.
*/
/* include removed: duk_internal.h */
/*
* Local declarations.
*/
DUK_LOCAL_DECL void duk__js_execute_bytecode_inner(duk_hthread *entry_thread, duk_size_t entry_callstack_top);
/*
* Arithmetic, binary, and logical helpers.
*
* Note: there is no opcode for logical AND or logical OR; this is on
* purpose, because the evalution order semantics for them make such
* opcodes pretty pointless: short circuiting means they are most
* comfortably implemented as jumps. However, a logical NOT opcode
* is useful.
*
* Note: careful with duk_tval pointers here: they are potentially
* invalidated by any DECREF and almost any API call. It's still
* preferable to work without making a copy but that's not always
* possible.
*/
DUK_LOCAL duk_double_t duk__compute_mod(duk_double_t d1, duk_double_t d2) {
/*
* Ecmascript modulus ('%') does not match IEEE 754 "remainder"
* operation (implemented by remainder() in C99) but does seem
* to match ANSI C fmod().
*
* Compare E5 Section 11.5.3 and "man fmod".
*/
return (duk_double_t) DUK_FMOD((double) d1, (double) d2);
}
DUK_LOCAL void duk__vm_arith_add(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y, duk_small_uint_fast_t idx_z) {
/*
* Addition operator is different from other arithmetic
* operations in that it also provides string concatenation.
* Hence it is implemented separately.
*
* There is a fast path for number addition. Other cases go
* through potentially multiple coercions as described in the
* E5 specification. It may be possible to reduce the number
* of coercions, but this must be done carefully to preserve
* the exact semantics.
*
* E5 Section 11.6.1.
*
* Custom types also have special behavior implemented here.
*/
duk_context *ctx = (duk_context *) thr;
duk_double_union du;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(tv_x != NULL); /* may be reg or const */
DUK_ASSERT(tv_y != NULL); /* may be reg or const */
DUK_ASSERT_DISABLE(idx_z >= 0); /* unsigned */
DUK_ASSERT((duk_uint_t) idx_z < (duk_uint_t) duk_get_top(ctx));
/*
* Fast paths
*/
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv_x) && DUK_TVAL_IS_FASTINT(tv_y)) {
duk_int64_t v1, v2, v3;
duk_int32_t v3_hi;
duk_tval *tv_z;
/* Input values are signed 48-bit so we can detect overflow
* reliably from high bits or just a comparison.
*/
v1 = DUK_TVAL_GET_FASTINT(tv_x);
v2 = DUK_TVAL_GET_FASTINT(tv_y);
v3 = v1 + v2;
v3_hi = (duk_int32_t) (v3 >> 32);
if (DUK_LIKELY(v3_hi >= -0x8000LL && v3_hi <= 0x7fffLL)) {
tv_z = thr->valstack_bottom + idx_z;
DUK_TVAL_SET_FASTINT_UPDREF(thr, tv_z, v3); /* side effects */
return;
} else {
/* overflow, fall through */
;
}
}
#endif /* DUK_USE_FASTINT */
if (DUK_TVAL_IS_NUMBER(tv_x) && DUK_TVAL_IS_NUMBER(tv_y)) {
duk_tval *tv_z;
du.d = DUK_TVAL_GET_NUMBER(tv_x) + DUK_TVAL_GET_NUMBER(tv_y);
DUK_DBLUNION_NORMALIZE_NAN_CHECK(&du);
DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&du));
tv_z = thr->valstack_bottom + idx_z;
DUK_TVAL_SET_NUMBER_UPDREF(thr, tv_z, du.d); /* side effects */
return;
}
/*
* Slow path: potentially requires function calls for coercion
*/
duk_push_tval(ctx, tv_x);
duk_push_tval(ctx, tv_y);
duk_to_primitive(ctx, -2, DUK_HINT_NONE); /* side effects -> don't use tv_x, tv_y after */
duk_to_primitive(ctx, -1, DUK_HINT_NONE);
/* As a first approximation, buffer values are coerced to strings
* for addition. This means that adding two buffers currently
* results in a string.
*/
if (duk_check_type_mask(ctx, -2, DUK_TYPE_MASK_STRING | DUK_TYPE_MASK_BUFFER) ||
duk_check_type_mask(ctx, -1, DUK_TYPE_MASK_STRING | DUK_TYPE_MASK_BUFFER)) {
duk_to_string(ctx, -2);
duk_to_string(ctx, -1);
duk_concat(ctx, 2); /* [... s1 s2] -> [... s1+s2] */
duk_replace(ctx, (duk_idx_t) idx_z); /* side effects */
} else {
duk_double_t d1, d2;
d1 = duk_to_number(ctx, -2);
d2 = duk_to_number(ctx, -1);
DUK_ASSERT(duk_is_number(ctx, -2));
DUK_ASSERT(duk_is_number(ctx, -1));
DUK_ASSERT_DOUBLE_IS_NORMALIZED(d1);
DUK_ASSERT_DOUBLE_IS_NORMALIZED(d2);
du.d = d1 + d2;
DUK_DBLUNION_NORMALIZE_NAN_CHECK(&du);
DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&du));
duk_pop_2(ctx);
duk_push_number(ctx, du.d);
duk_replace(ctx, (duk_idx_t) idx_z); /* side effects */
}
}
DUK_LOCAL void duk__vm_arith_binary_op(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y, duk_idx_t idx_z, duk_small_uint_fast_t opcode) {
/*
* Arithmetic operations other than '+' have number-only semantics
* and are implemented here. The separate switch-case here means a
* "double dispatch" of the arithmetic opcode, but saves code space.
*
* E5 Sections 11.5, 11.5.1, 11.5.2, 11.5.3, 11.6, 11.6.1, 11.6.2, 11.6.3.
*/
duk_context *ctx = (duk_context *) thr;
duk_tval *tv_z;
duk_double_t d1, d2;
duk_double_union du;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(tv_x != NULL); /* may be reg or const */
DUK_ASSERT(tv_y != NULL); /* may be reg or const */
DUK_ASSERT_DISABLE(idx_z >= 0); /* unsigned */
DUK_ASSERT((duk_uint_t) idx_z < (duk_uint_t) duk_get_top(ctx));
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv_x) && DUK_TVAL_IS_FASTINT(tv_y)) {
duk_int64_t v1, v2, v3;
duk_int32_t v3_hi;
v1 = DUK_TVAL_GET_FASTINT(tv_x);
v2 = DUK_TVAL_GET_FASTINT(tv_y);
switch (opcode) {
case DUK_OP_SUB: {
v3 = v1 - v2;
break;
}
case DUK_OP_MUL: {
/* Must ensure result is 64-bit (no overflow); a
* simple and sufficient fast path is to allow only
* 32-bit inputs. Avoid zero inputs to avoid
* negative zero issues (-1 * 0 = -0, for instance).
*/
if (v1 >= -0x80000000LL && v1 <= 0x7fffffffLL && v1 != 0 &&
v2 >= -0x80000000LL && v2 <= 0x7fffffffLL && v2 != 0) {
v3 = v1 * v2;
} else {
goto skip_fastint;
}
break;
}
case DUK_OP_DIV: {
/* Don't allow a zero divisor. Fast path check by
* "verifying" with multiplication. Also avoid zero
* dividend to avoid negative zero issues (0 / -1 = -0
* for instance).
*/
if (v1 == 0 || v2 == 0) {
goto skip_fastint;
}
v3 = v1 / v2;
if (v3 * v2 != v1) {
goto skip_fastint;
}
break;
}
case DUK_OP_MOD: {
/* Don't allow a zero divisor. Restrict both v1 and
* v2 to positive values to avoid compiler specific
* behavior.
*/
if (v1 < 1 || v2 < 1) {
goto skip_fastint;
}
v3 = v1 % v2;
DUK_ASSERT(v3 >= 0);
DUK_ASSERT(v3 < v2);
DUK_ASSERT(v1 - (v1 / v2) * v2 == v3);
break;
}
default: {
DUK_UNREACHABLE();
goto skip_fastint;
}
}
v3_hi = (duk_int32_t) (v3 >> 32);
if (DUK_LIKELY(v3_hi >= -0x8000LL && v3_hi <= 0x7fffLL)) {
tv_z = thr->valstack_bottom + idx_z;
DUK_TVAL_SET_FASTINT_UPDREF(thr, tv_z, v3); /* side effects */
return;
}
/* fall through if overflow etc */
}
skip_fastint:
#endif /* DUK_USE_FASTINT */
if (DUK_TVAL_IS_NUMBER(tv_x) && DUK_TVAL_IS_NUMBER(tv_y)) {
/* fast path */
d1 = DUK_TVAL_GET_NUMBER(tv_x);
d2 = DUK_TVAL_GET_NUMBER(tv_y);
} else {
duk_push_tval(ctx, tv_x);
duk_push_tval(ctx, tv_y);
d1 = duk_to_number(ctx, -2); /* side effects */
d2 = duk_to_number(ctx, -1);
DUK_ASSERT(duk_is_number(ctx, -2));
DUK_ASSERT(duk_is_number(ctx, -1));
DUK_ASSERT_DOUBLE_IS_NORMALIZED(d1);
DUK_ASSERT_DOUBLE_IS_NORMALIZED(d2);
duk_pop_2(ctx);
}
switch (opcode) {
case DUK_OP_SUB: {
du.d = d1 - d2;
break;
}
case DUK_OP_MUL: {
du.d = d1 * d2;
break;
}
case DUK_OP_DIV: {
du.d = d1 / d2;
break;
}
case DUK_OP_MOD: {
du.d = duk__compute_mod(d1, d2);
break;
}
default: {
DUK_UNREACHABLE();
du.d = DUK_DOUBLE_NAN; /* should not happen */
break;
}
}
/* important to use normalized NaN with 8-byte tagged types */
DUK_DBLUNION_NORMALIZE_NAN_CHECK(&du);
DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&du));
tv_z = thr->valstack_bottom + idx_z;
DUK_TVAL_SET_NUMBER_UPDREF(thr, tv_z, du.d); /* side effects */
}
DUK_LOCAL void duk__vm_bitwise_binary_op(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y, duk_small_uint_fast_t idx_z, duk_small_uint_fast_t opcode) {
/*
* Binary bitwise operations use different coercions (ToInt32, ToUint32)
* depending on the operation. We coerce the arguments first using
* ToInt32(), and then cast to an 32-bit value if necessary. Note that
* such casts must be correct even if there is no native 32-bit type
* (e.g., duk_int32_t and duk_uint32_t are 64-bit).
*
* E5 Sections 11.10, 11.7.1, 11.7.2, 11.7.3
*/
duk_context *ctx = (duk_context *) thr;
duk_tval *tv_z;
duk_int32_t i1, i2, i3;
duk_uint32_t u1, u2, u3;
#if defined(DUK_USE_FASTINT)
duk_int64_t fi3;
#else
duk_double_t d3;
#endif
DUK_ASSERT(thr != NULL);
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(tv_x != NULL); /* may be reg or const */
DUK_ASSERT(tv_y != NULL); /* may be reg or const */
DUK_ASSERT_DISABLE(idx_z >= 0); /* unsigned */
DUK_ASSERT((duk_uint_t) idx_z < (duk_uint_t) duk_get_top(ctx));
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv_x) && DUK_TVAL_IS_FASTINT(tv_y)) {
i1 = (duk_int32_t) DUK_TVAL_GET_FASTINT_I32(tv_x);
i2 = (duk_int32_t) DUK_TVAL_GET_FASTINT_I32(tv_y);
}
else
#endif /* DUK_USE_FASTINT */
{
duk_push_tval(ctx, tv_x);
duk_push_tval(ctx, tv_y);
i1 = duk_to_int32(ctx, -2);
i2 = duk_to_int32(ctx, -1);
duk_pop_2(ctx);
}
switch (opcode) {
case DUK_OP_BAND: {
i3 = i1 & i2;
break;
}
case DUK_OP_BOR: {
i3 = i1 | i2;
break;
}
case DUK_OP_BXOR: {
i3 = i1 ^ i2;
break;
}
case DUK_OP_BASL: {
/* Signed shift, named "arithmetic" (asl) because the result
* is signed, e.g. 4294967295 << 1 -> -2. Note that result
* must be masked.
*/
u2 = ((duk_uint32_t) i2) & 0xffffffffUL;
i3 = i1 << (u2 & 0x1f); /* E5 Section 11.7.1, steps 7 and 8 */
i3 = i3 & ((duk_int32_t) 0xffffffffUL); /* Note: left shift, should mask */
break;
}
case DUK_OP_BASR: {
/* signed shift */
u2 = ((duk_uint32_t) i2) & 0xffffffffUL;
i3 = i1 >> (u2 & 0x1f); /* E5 Section 11.7.2, steps 7 and 8 */
break;
}
case DUK_OP_BLSR: {
/* unsigned shift */
u1 = ((duk_uint32_t) i1) & 0xffffffffUL;
u2 = ((duk_uint32_t) i2) & 0xffffffffUL;
/* special result value handling */
u3 = u1 >> (u2 & 0x1f); /* E5 Section 11.7.2, steps 7 and 8 */
#if defined(DUK_USE_FASTINT)
fi3 = (duk_int64_t) u3;
goto fastint_result_set;
#else
d3 = (duk_double_t) u3;
goto result_set;
#endif
}
default: {
DUK_UNREACHABLE();
i3 = 0; /* should not happen */
break;
}
}
#if defined(DUK_USE_FASTINT)
/* Result is always fastint compatible. */
/* XXX: Set 32-bit result (but must then handle signed and
* unsigned results separately).
*/
fi3 = (duk_int64_t) i3;
fastint_result_set:
tv_z = thr->valstack_bottom + idx_z;
DUK_TVAL_SET_FASTINT_UPDREF(thr, tv_z, fi3); /* side effects */
#else
d3 = (duk_double_t) i3;
result_set:
DUK_ASSERT(!DUK_ISNAN(d3)); /* 'd3' is never NaN, so no need to normalize */
DUK_ASSERT_DOUBLE_IS_NORMALIZED(d3); /* always normalized */
tv_z = thr->valstack_bottom + idx_z;
DUK_TVAL_SET_NUMBER_UPDREF(thr, tv_z, d3); /* side effects */
#endif
}
/* In-place unary operation. */
DUK_LOCAL void duk__vm_arith_unary_op(duk_hthread *thr, duk_tval *tv_x, duk_idx_t idx_x, duk_small_uint_fast_t opcode) {
/*
* Arithmetic operations other than '+' have number-only semantics
* and are implemented here. The separate switch-case here means a
* "double dispatch" of the arithmetic opcode, but saves code space.
*
* E5 Sections 11.5, 11.5.1, 11.5.2, 11.5.3, 11.6, 11.6.1, 11.6.2, 11.6.3.
*/
duk_context *ctx = (duk_context *) thr;
duk_double_t d1;
duk_double_union du;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(opcode == DUK_EXTRAOP_UNM || opcode == DUK_EXTRAOP_UNP);
DUK_ASSERT(tv_x != NULL);
DUK_ASSERT(idx_x >= 0);
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv_x)) {
duk_int64_t v1, v2;
v1 = DUK_TVAL_GET_FASTINT(tv_x);
if (opcode == DUK_EXTRAOP_UNM) {
/* The smallest fastint is no longer 48-bit when
* negated. Positive zero becames negative zero
* (cannot be represented) when negated.
*/
if (DUK_LIKELY(v1 != DUK_FASTINT_MIN && v1 != 0)) {
v2 = -v1;
DUK_TVAL_SET_FASTINT(tv_x, v2); /* no refcount changes */
return;
}
} else {
/* ToNumber() for a fastint is a no-op. */
DUK_ASSERT(opcode == DUK_EXTRAOP_UNP);
return;
}
/* fall through if overflow etc */
}
#endif /* DUK_USE_FASTINT */
if (!DUK_TVAL_IS_NUMBER(tv_x)) {
duk_to_number(ctx, idx_x); /* side effects, perform in-place */
tv_x = DUK_GET_TVAL_POSIDX(ctx, idx_x);
DUK_ASSERT(tv_x != NULL);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_x));
}
d1 = DUK_TVAL_GET_NUMBER(tv_x);
if (opcode == DUK_EXTRAOP_UNM) {
du.d = -d1;
} else {
/* ToNumber() for a double is a no-op. */
DUK_ASSERT(opcode == DUK_EXTRAOP_UNP);
du.d = d1;
}
DUK_DBLUNION_NORMALIZE_NAN_CHECK(&du); /* mandatory if du.d is a NaN */
DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&du));
#if defined(DUK_USE_FASTINT)
/* Unary plus is used to force a fastint check, so must include
* downgrade check.
*/
DUK_TVAL_SET_NUMBER_CHKFAST(tv_x, du.d); /* no refcount changes */
#else
DUK_TVAL_SET_NUMBER(tv_x, du.d); /* no refcount changes */
#endif
}
DUK_LOCAL void duk__vm_bitwise_not(duk_hthread *thr, duk_tval *tv_x, duk_uint_fast_t idx_z) {
/*
* E5 Section 11.4.8
*/
duk_context *ctx = (duk_context *) thr;
duk_tval *tv_z;
duk_int32_t i1, i2;
#if !defined(DUK_USE_FASTINT)
duk_double_t d2;
#endif
DUK_ASSERT(thr != NULL);
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(tv_x != NULL); /* may be reg or const */
DUK_ASSERT_DISABLE(idx_z >= 0);
DUK_ASSERT((duk_uint_t) idx_z < (duk_uint_t) duk_get_top(ctx));
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv_x)) {
i1 = (duk_int32_t) DUK_TVAL_GET_FASTINT_I32(tv_x);
}
else
#endif /* DUK_USE_FASTINT */
{
duk_push_tval(ctx, tv_x);
i1 = duk_to_int32(ctx, -1);
duk_pop(ctx);
}
i2 = ~i1;
#if defined(DUK_USE_FASTINT)
/* Result is always fastint compatible. */
tv_z = thr->valstack_bottom + idx_z;
DUK_TVAL_SET_FASTINT_I32_UPDREF(thr, tv_z, i2); /* side effects */
#else
d2 = (duk_double_t) i2;
DUK_ASSERT(!DUK_ISNAN(d2)); /* 'val' is never NaN, so no need to normalize */
DUK_ASSERT_DOUBLE_IS_NORMALIZED(d2); /* always normalized */
tv_z = thr->valstack_bottom + idx_z;
DUK_TVAL_SET_NUMBER_UPDREF(thr, tv_z, d2); /* side effects */
#endif
}
DUK_LOCAL void duk__vm_logical_not(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_z) {
/*
* E5 Section 11.4.9
*/
duk_bool_t res;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(tv_x != NULL); /* may be reg or const */
DUK_ASSERT(tv_z != NULL); /* reg */
DUK_UNREF(thr); /* w/o refcounts */
/* ToBoolean() does not require any operations with side effects so
* we can do it efficiently. For footprint it would be better to use
* duk_js_toboolean() and then push+replace to the result slot.
*/
res = duk_js_toboolean(tv_x); /* does not modify tv_x */
DUK_ASSERT(res == 0 || res == 1);
res ^= 1;
DUK_TVAL_SET_BOOLEAN_UPDREF(thr, tv_z, res); /* side effects */
}
/*
* Longjmp and other control flow transfer for the bytecode executor.
*
* The longjmp handler can handle all longjmp types: error, yield, and
* resume (pseudotypes are never actually thrown).
*
* Error policy for longjmp: should not ordinarily throw errors; if errors
* occur (e.g. due to out-of-memory) they bubble outwards rather than being
* handled recursively.
*/
#define DUK__LONGJMP_RESTART 0 /* state updated, restart bytecode execution */
#define DUK__LONGJMP_RETHROW 1 /* exit bytecode executor by rethrowing an error to caller */
#define DUK__RETHAND_RESTART 0 /* state updated, restart bytecode execution */
#define DUK__RETHAND_FINISHED 1 /* exit bytecode execution with return value */
/* XXX: optimize reconfig valstack operations so that resize, clamp, and setting
* top are combined into one pass.
*/
/* Reconfigure value stack for return to an Ecmascript function at 'act_idx'. */
DUK_LOCAL void duk__reconfig_valstack_ecma_return(duk_hthread *thr, duk_size_t act_idx) {
duk_activation *act;
duk_hcompiledfunction *h_func;
duk_idx_t clamp_top;
DUK_ASSERT(thr != NULL);
DUK_ASSERT_DISABLE(act_idx >= 0); /* unsigned */
DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack + act_idx) != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION(DUK_ACT_GET_FUNC(thr->callstack + act_idx)));
DUK_ASSERT_DISABLE(thr->callstack[act_idx].idx_retval >= 0); /* unsigned */
/* Clamp so that values at 'clamp_top' and above are wiped and won't
* retain reachable garbage. Then extend to 'nregs' because we're
* returning to an Ecmascript function.
*/
act = thr->callstack + act_idx;
h_func = (duk_hcompiledfunction *) DUK_ACT_GET_FUNC(act);
thr->valstack_bottom = thr->valstack + act->idx_bottom;
DUK_ASSERT(act->idx_retval >= act->idx_bottom);
clamp_top = (duk_idx_t) (act->idx_retval - act->idx_bottom + 1); /* +1 = one retval */
duk_set_top((duk_context *) thr, clamp_top);
act = NULL;
(void) duk_valstack_resize_raw((duk_context *) thr,
(thr->valstack_bottom - thr->valstack) + /* bottom of current func */
h_func->nregs + /* reg count */
DUK_VALSTACK_INTERNAL_EXTRA, /* + spare */
DUK_VSRESIZE_FLAG_SHRINK | /* flags */
0 /* no compact */ |
DUK_VSRESIZE_FLAG_THROW);
duk_set_top((duk_context *) thr, h_func->nregs);
}
DUK_LOCAL void duk__reconfig_valstack_ecma_catcher(duk_hthread *thr, duk_size_t act_idx, duk_size_t cat_idx) {
duk_activation *act;
duk_catcher *cat;
duk_hcompiledfunction *h_func;
duk_idx_t clamp_top;
DUK_ASSERT(thr != NULL);
DUK_ASSERT_DISABLE(act_idx >= 0); /* unsigned */
DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack + act_idx) != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION(DUK_ACT_GET_FUNC(thr->callstack + act_idx)));
DUK_ASSERT_DISABLE(thr->callstack[act_idx].idx_retval >= 0); /* unsigned */
act = thr->callstack + act_idx;
cat = thr->catchstack + cat_idx;
h_func = (duk_hcompiledfunction *) DUK_ACT_GET_FUNC(act);
thr->valstack_bottom = thr->valstack + act->idx_bottom;
DUK_ASSERT(cat->idx_base >= act->idx_bottom);
clamp_top = (duk_idx_t) (cat->idx_base - act->idx_bottom + 2); /* +2 = catcher value, catcher lj_type */
duk_set_top((duk_context *) thr, clamp_top);
act = NULL;
cat = NULL;
(void) duk_valstack_resize_raw((duk_context *) thr,
(thr->valstack_bottom - thr->valstack) + /* bottom of current func */
h_func->nregs + /* reg count */
DUK_VALSTACK_INTERNAL_EXTRA, /* + spare */
DUK_VSRESIZE_FLAG_SHRINK | /* flags */
0 /* no compact */ |
DUK_VSRESIZE_FLAG_THROW);
duk_set_top((duk_context *) thr, h_func->nregs);
}
/* Set catcher regs: idx_base+0 = value, idx_base+1 = lj_type. */
DUK_LOCAL void duk__set_catcher_regs(duk_hthread *thr, duk_size_t cat_idx, duk_tval *tv_val_unstable, duk_small_uint_t lj_type) {
duk_tval *tv1;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(tv_val_unstable != NULL);
tv1 = thr->valstack + thr->catchstack[cat_idx].idx_base;
DUK_ASSERT(tv1 < thr->valstack_top);
DUK_TVAL_SET_TVAL_UPDREF(thr, tv1, tv_val_unstable); /* side effects */
tv1 = thr->valstack + thr->catchstack[cat_idx].idx_base + 1;
DUK_ASSERT(tv1 < thr->valstack_top);
DUK_TVAL_SET_FASTINT_U32_UPDREF(thr, tv1, (duk_uint32_t) lj_type); /* side effects */
}
DUK_LOCAL void duk__handle_catch(duk_hthread *thr, duk_size_t cat_idx, duk_tval *tv_val_unstable, duk_small_uint_t lj_type) {
duk_context *ctx;
duk_activation *act;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(tv_val_unstable != NULL);
ctx = (duk_context *) thr;
duk__set_catcher_regs(thr, cat_idx, tv_val_unstable, lj_type);
duk_hthread_catchstack_unwind(thr, cat_idx + 1);
duk_hthread_callstack_unwind(thr, thr->catchstack[cat_idx].callstack_index + 1);
DUK_ASSERT(thr->callstack_top >= 1);
DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 1) != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 1)));
duk__reconfig_valstack_ecma_catcher(thr, thr->callstack_top - 1, cat_idx);
DUK_ASSERT(thr->callstack_top >= 1);
act = thr->callstack + thr->callstack_top - 1;
act->curr_pc = thr->catchstack[cat_idx].pc_base + 0; /* +0 = catch */
act = NULL;
/*
* If entering a 'catch' block which requires an automatic
* catch variable binding, create the lexical environment.
*
* The binding is mutable (= writable) but not deletable.
* Step 4 for the catch production in E5 Section 12.14;
* no value is given for CreateMutableBinding 'D' argument,
* which implies the binding is not deletable.
*/
if (DUK_CAT_HAS_CATCH_BINDING_ENABLED(&thr->catchstack[cat_idx])) {
duk_hobject *new_env;
duk_hobject *act_lex_env;
DUK_DDD(DUK_DDDPRINT("catcher has an automatic catch binding"));
/* Note: 'act' is dangerous here because it may get invalidate at many
* points, so we re-lookup it multiple times.
*/
DUK_ASSERT(thr->callstack_top >= 1);
act = thr->callstack + thr->callstack_top - 1;
if (act->lex_env == NULL) {
DUK_ASSERT(act->var_env == NULL);
DUK_DDD(DUK_DDDPRINT("delayed environment initialization"));
/* this may have side effects, so re-lookup act */
duk_js_init_activation_environment_records_delayed(thr, act);
act = thr->callstack + thr->callstack_top - 1;
}
DUK_ASSERT(act->lex_env != NULL);
DUK_ASSERT(act->var_env != NULL);
DUK_ASSERT(DUK_ACT_GET_FUNC(act) != NULL);
DUK_UNREF(act); /* unreferenced without assertions */
act = thr->callstack + thr->callstack_top - 1;
act_lex_env = act->lex_env;
act = NULL; /* invalidated */
(void) duk_push_object_helper_proto(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_DECENV),
act_lex_env);
new_env = DUK_GET_HOBJECT_NEGIDX(ctx, -1);
DUK_ASSERT(new_env != NULL);
DUK_DDD(DUK_DDDPRINT("new_env allocated: %!iO", (duk_heaphdr *) new_env));
/* Note: currently the catch binding is handled without a register
* binding because we don't support dynamic register bindings (they
* must be fixed for an entire function). So, there is no need to
* record regbases etc.
*/
DUK_ASSERT(thr->catchstack[cat_idx].h_varname != NULL);
duk_push_hstring(ctx, thr->catchstack[cat_idx].h_varname);
duk_push_tval(ctx, thr->valstack + thr->catchstack[cat_idx].idx_base);
duk_xdef_prop(ctx, -3, DUK_PROPDESC_FLAGS_W); /* writable, not configurable */
act = thr->callstack + thr->callstack_top - 1;
act->lex_env = new_env;
DUK_HOBJECT_INCREF(thr, new_env); /* reachable through activation */
DUK_CAT_SET_LEXENV_ACTIVE(&thr->catchstack[cat_idx]);
duk_pop(ctx);
DUK_DDD(DUK_DDDPRINT("new_env finished: %!iO", (duk_heaphdr *) new_env));
}
DUK_CAT_CLEAR_CATCH_ENABLED(&thr->catchstack[cat_idx]);
}
DUK_LOCAL void duk__handle_finally(duk_hthread *thr, duk_size_t cat_idx, duk_tval *tv_val_unstable, duk_small_uint_t lj_type) {
duk_activation *act;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(tv_val_unstable != NULL);
duk__set_catcher_regs(thr, cat_idx, tv_val_unstable, lj_type);
duk_hthread_catchstack_unwind(thr, cat_idx + 1); /* cat_idx catcher is kept, even for finally */
duk_hthread_callstack_unwind(thr, thr->catchstack[cat_idx].callstack_index + 1);
DUK_ASSERT(thr->callstack_top >= 1);
DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 1) != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 1)));
duk__reconfig_valstack_ecma_catcher(thr, thr->callstack_top - 1, cat_idx);
DUK_ASSERT(thr->callstack_top >= 1);
act = thr->callstack + thr->callstack_top - 1;
act->curr_pc = thr->catchstack[cat_idx].pc_base + 1; /* +1 = finally */
act = NULL;
DUK_CAT_CLEAR_FINALLY_ENABLED(&thr->catchstack[cat_idx]);
}
DUK_LOCAL void duk__handle_label(duk_hthread *thr, duk_size_t cat_idx, duk_small_uint_t lj_type) {
duk_activation *act;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->callstack_top >= 1);
act = thr->callstack + thr->callstack_top - 1;
DUK_ASSERT(DUK_ACT_GET_FUNC(act) != NULL);
DUK_ASSERT(DUK_HOBJECT_HAS_COMPILEDFUNCTION(DUK_ACT_GET_FUNC(act)));
/* +0 = break, +1 = continue */
act->curr_pc = thr->catchstack[cat_idx].pc_base + (lj_type == DUK_LJ_TYPE_CONTINUE ? 1 : 0);
act = NULL; /* invalidated */
duk_hthread_catchstack_unwind(thr, cat_idx + 1); /* keep label catcher */
/* no need to unwind callstack */
/* valstack should not need changes */
#if defined(DUK_USE_ASSERTIONS)
DUK_ASSERT(thr->callstack_top >= 1);
act = thr->callstack + thr->callstack_top - 1;
DUK_ASSERT((duk_size_t) (thr->valstack_top - thr->valstack_bottom) ==
(duk_size_t) ((duk_hcompiledfunction *) DUK_ACT_GET_FUNC(act))->nregs);
#endif
}
/* Called for handling both a longjmp() with type DUK_LJ_TYPE_YIELD and
* when a RETURN opcode terminates a thread and yields to the resumer.
*/
DUK_LOCAL void duk__handle_yield(duk_hthread *thr, duk_hthread *resumer, duk_size_t act_idx, duk_tval *tv_val_unstable) {
duk_tval *tv1;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(resumer != NULL);
DUK_ASSERT(tv_val_unstable != NULL);
DUK_ASSERT(DUK_ACT_GET_FUNC(resumer->callstack + act_idx) != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION(DUK_ACT_GET_FUNC(resumer->callstack + act_idx))); /* resume caller must be an ecmascript func */
tv1 = resumer->valstack + resumer->callstack[act_idx].idx_retval; /* return value from Duktape.Thread.resume() */
DUK_TVAL_SET_TVAL_UPDREF(thr, tv1, tv_val_unstable); /* side effects */
duk_hthread_callstack_unwind(resumer, act_idx + 1); /* unwind to 'resume' caller */
/* no need to unwind catchstack */
duk__reconfig_valstack_ecma_return(resumer, act_idx);
/* caller must change active thread, and set thr->resumer to NULL */
}
DUK_LOCAL
duk_small_uint_t duk__handle_longjmp(duk_hthread *thr,
duk_hthread *entry_thread,
duk_size_t entry_callstack_top) {
duk_size_t entry_callstack_index;
duk_small_uint_t retval = DUK__LONGJMP_RESTART;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(entry_thread != NULL);
DUK_ASSERT(entry_callstack_top > 0); /* guarantees entry_callstack_top - 1 >= 0 */
entry_callstack_index = entry_callstack_top - 1;
/* 'thr' is the current thread, as no-one resumes except us and we
* switch 'thr' in that case.
*/
DUK_ASSERT(thr == thr->heap->curr_thread);
/*
* (Re)try handling the longjmp.
*
* A longjmp handler may convert the longjmp to a different type and
* "virtually" rethrow by goto'ing to 'check_longjmp'. Before the goto,
* the following must be updated:
* - the heap 'lj' state
* - 'thr' must reflect the "throwing" thread
*/
check_longjmp:
DUK_DD(DUK_DDPRINT("handling longjmp: type=%ld, value1=%!T, value2=%!T, iserror=%ld",
(long) thr->heap->lj.type,
(duk_tval *) &thr->heap->lj.value1,
(duk_tval *) &thr->heap->lj.value2,
(long) thr->heap->lj.iserror));
switch (thr->heap->lj.type) {
case DUK_LJ_TYPE_RESUME: {
/*
* Note: lj.value1 is 'value', lj.value2 is 'resumee'.
* This differs from YIELD.
*/
duk_tval *tv;
duk_tval *tv2;
duk_size_t act_idx;
duk_hthread *resumee;
/* duk_bi_duk_object_yield() and duk_bi_duk_object_resume() ensure all of these are met */
DUK_ASSERT(thr->state == DUK_HTHREAD_STATE_RUNNING); /* unchanged by Duktape.Thread.resume() */
DUK_ASSERT(thr->callstack_top >= 2); /* Ecmascript activation + Duktape.Thread.resume() activation */
DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 1) != NULL &&
DUK_HOBJECT_IS_NATIVEFUNCTION(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 1)) &&
((duk_hnativefunction *) DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 1))->func == duk_bi_thread_resume);
DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 2) != NULL &&
DUK_HOBJECT_IS_COMPILEDFUNCTION(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 2))); /* an Ecmascript function */
DUK_ASSERT_DISABLE((thr->callstack + thr->callstack_top - 2)->idx_retval >= 0); /* unsigned */
tv = &thr->heap->lj.value2; /* resumee */
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv));
DUK_ASSERT(DUK_TVAL_GET_OBJECT(tv) != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_THREAD(DUK_TVAL_GET_OBJECT(tv)));
resumee = (duk_hthread *) DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(resumee != NULL);
DUK_ASSERT(resumee->resumer == NULL);
DUK_ASSERT(resumee->state == DUK_HTHREAD_STATE_INACTIVE ||
resumee->state == DUK_HTHREAD_STATE_YIELDED); /* checked by Duktape.Thread.resume() */
DUK_ASSERT(resumee->state != DUK_HTHREAD_STATE_YIELDED ||
resumee->callstack_top >= 2); /* YIELDED: Ecmascript activation + Duktape.Thread.yield() activation */
DUK_ASSERT(resumee->state != DUK_HTHREAD_STATE_YIELDED ||
(DUK_ACT_GET_FUNC(resumee->callstack + resumee->callstack_top - 1) != NULL &&
DUK_HOBJECT_IS_NATIVEFUNCTION(DUK_ACT_GET_FUNC(resumee->callstack + resumee->callstack_top - 1)) &&
((duk_hnativefunction *) DUK_ACT_GET_FUNC(resumee->callstack + resumee->callstack_top - 1))->func == duk_bi_thread_yield));
DUK_ASSERT(resumee->state != DUK_HTHREAD_STATE_YIELDED ||
(DUK_ACT_GET_FUNC(resumee->callstack + resumee->callstack_top - 2) != NULL &&
DUK_HOBJECT_IS_COMPILEDFUNCTION(DUK_ACT_GET_FUNC(resumee->callstack + resumee->callstack_top - 2)))); /* an Ecmascript function */
DUK_ASSERT_DISABLE(resumee->state != DUK_HTHREAD_STATE_YIELDED ||
(resumee->callstack + resumee->callstack_top - 2)->idx_retval >= 0); /* idx_retval unsigned */
DUK_ASSERT(resumee->state != DUK_HTHREAD_STATE_INACTIVE ||
resumee->callstack_top == 0); /* INACTIVE: no activation, single function value on valstack */
DUK_ASSERT(resumee->state != DUK_HTHREAD_STATE_INACTIVE ||
(resumee->valstack_top == resumee->valstack + 1 &&
DUK_TVAL_IS_OBJECT(resumee->valstack_top - 1) &&
DUK_HOBJECT_IS_COMPILEDFUNCTION(DUK_TVAL_GET_OBJECT(resumee->valstack_top - 1))));
if (thr->heap->lj.iserror) {
/*
* Throw the error in the resumed thread's context; the
* error value is pushed onto the resumee valstack.
*
* Note: the callstack of the target may empty in this case
* too (i.e. the target thread has never been resumed). The
* value stack will contain the initial function in that case,
* which we simply ignore.
*/
resumee->resumer = thr;
resumee->state = DUK_HTHREAD_STATE_RUNNING;
thr->state = DUK_HTHREAD_STATE_RESUMED;
DUK_HEAP_SWITCH_THREAD(thr->heap, resumee);
thr = resumee;
thr->heap->lj.type = DUK_LJ_TYPE_THROW;
/* thr->heap->lj.value1 is already the value to throw */
/* thr->heap->lj.value2 is 'thread', will be wiped out at the end */
DUK_ASSERT(thr->heap->lj.iserror); /* already set */
DUK_DD(DUK_DDPRINT("-> resume with an error, converted to a throw in the resumee, propagate"));
goto check_longjmp;
} else if (resumee->state == DUK_HTHREAD_STATE_YIELDED) {
act_idx = resumee->callstack_top - 2; /* Ecmascript function */
DUK_ASSERT_DISABLE(resumee->callstack[act_idx].idx_retval >= 0); /* unsigned */
tv = resumee->valstack + resumee->callstack[act_idx].idx_retval; /* return value from Duktape.Thread.yield() */
DUK_ASSERT(tv >= resumee->valstack && tv < resumee->valstack_top);
tv2 = &thr->heap->lj.value1;
DUK_TVAL_SET_TVAL_UPDREF(thr, tv, tv2); /* side effects */
duk_hthread_callstack_unwind(resumee, act_idx + 1); /* unwind to 'yield' caller */
/* no need to unwind catchstack */
duk__reconfig_valstack_ecma_return(resumee, act_idx);
resumee->resumer = thr;
resumee->state = DUK_HTHREAD_STATE_RUNNING;
thr->state = DUK_HTHREAD_STATE_RESUMED;
DUK_HEAP_SWITCH_THREAD(thr->heap, resumee);
#if 0
thr = resumee; /* not needed, as we exit right away */
#endif
DUK_DD(DUK_DDPRINT("-> resume with a value, restart execution in resumee"));
retval = DUK__LONGJMP_RESTART;
goto wipe_and_return;
} else {
duk_small_uint_t call_flags;
duk_bool_t setup_rc;
/* resumee: [... initial_func] (currently actually: [initial_func]) */
duk_push_undefined((duk_context *) resumee);
tv = &thr->heap->lj.value1;
duk_push_tval((duk_context *) resumee, tv);
/* resumee: [... initial_func undefined(= this) resume_value ] */
call_flags = DUK_CALL_FLAG_IS_RESUME; /* is resume, not a tail call */
setup_rc = duk_handle_ecma_call_setup(resumee,
1, /* num_stack_args */
call_flags); /* call_flags */
if (setup_rc == 0) {
/* Shouldn't happen but check anyway. */
DUK_ERROR_INTERNAL_DEFMSG(thr);
}
resumee->resumer = thr;
resumee->state = DUK_HTHREAD_STATE_RUNNING;
thr->state = DUK_HTHREAD_STATE_RESUMED;
DUK_HEAP_SWITCH_THREAD(thr->heap, resumee);
#if 0
thr = resumee; /* not needed, as we exit right away */
#endif
DUK_DD(DUK_DDPRINT("-> resume with a value, restart execution in resumee"));
retval = DUK__LONGJMP_RESTART;
goto wipe_and_return;
}
DUK_UNREACHABLE();
break; /* never here */
}
case DUK_LJ_TYPE_YIELD: {
/*
* Currently only allowed only if yielding thread has only
* Ecmascript activations (except for the Duktape.Thread.yield()
* call at the callstack top) and none of them constructor
* calls.
*
* This excludes the 'entry' thread which will always have
* a preventcount > 0.
*/
duk_hthread *resumer;
/* duk_bi_duk_object_yield() and duk_bi_duk_object_resume() ensure all of these are met */
DUK_ASSERT(thr != entry_thread); /* Duktape.Thread.yield() should prevent */
DUK_ASSERT(thr->state == DUK_HTHREAD_STATE_RUNNING); /* unchanged from Duktape.Thread.yield() */
DUK_ASSERT(thr->callstack_top >= 2); /* Ecmascript activation + Duktape.Thread.yield() activation */
DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 1) != NULL &&
DUK_HOBJECT_IS_NATIVEFUNCTION(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 1)) &&
((duk_hnativefunction *) DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 1))->func == duk_bi_thread_yield);
DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 2) != NULL &&
DUK_HOBJECT_IS_COMPILEDFUNCTION(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 2))); /* an Ecmascript function */
DUK_ASSERT_DISABLE((thr->callstack + thr->callstack_top - 2)->idx_retval >= 0); /* unsigned */
resumer = thr->resumer;
DUK_ASSERT(resumer != NULL);
DUK_ASSERT(resumer->state == DUK_HTHREAD_STATE_RESUMED); /* written by a previous RESUME handling */
DUK_ASSERT(resumer->callstack_top >= 2); /* Ecmascript activation + Duktape.Thread.resume() activation */
DUK_ASSERT(DUK_ACT_GET_FUNC(resumer->callstack + resumer->callstack_top - 1) != NULL &&
DUK_HOBJECT_IS_NATIVEFUNCTION(DUK_ACT_GET_FUNC(resumer->callstack + resumer->callstack_top - 1)) &&
((duk_hnativefunction *) DUK_ACT_GET_FUNC(resumer->callstack + resumer->callstack_top - 1))->func == duk_bi_thread_resume);
DUK_ASSERT(DUK_ACT_GET_FUNC(resumer->callstack + resumer->callstack_top - 2) != NULL &&
DUK_HOBJECT_IS_COMPILEDFUNCTION(DUK_ACT_GET_FUNC(resumer->callstack + resumer->callstack_top - 2))); /* an Ecmascript function */
DUK_ASSERT_DISABLE((resumer->callstack + resumer->callstack_top - 2)->idx_retval >= 0); /* unsigned */
if (thr->heap->lj.iserror) {
thr->state = DUK_HTHREAD_STATE_YIELDED;
thr->resumer = NULL;
resumer->state = DUK_HTHREAD_STATE_RUNNING;
DUK_HEAP_SWITCH_THREAD(thr->heap, resumer);
thr = resumer;
thr->heap->lj.type = DUK_LJ_TYPE_THROW;
/* lj.value1 is already set */
DUK_ASSERT(thr->heap->lj.iserror); /* already set */
DUK_DD(DUK_DDPRINT("-> yield an error, converted to a throw in the resumer, propagate"));
goto check_longjmp;
} else {
duk__handle_yield(thr, resumer, resumer->callstack_top - 2, &thr->heap->lj.value1);
thr->state = DUK_HTHREAD_STATE_YIELDED;
thr->resumer = NULL;
resumer->state = DUK_HTHREAD_STATE_RUNNING;
DUK_HEAP_SWITCH_THREAD(thr->heap, resumer);
#if 0
thr = resumer; /* not needed, as we exit right away */
#endif
DUK_DD(DUK_DDPRINT("-> yield a value, restart execution in resumer"));
retval = DUK__LONGJMP_RESTART;
goto wipe_and_return;
}
DUK_UNREACHABLE();
break; /* never here */
}
case DUK_LJ_TYPE_THROW: {
/*
* Three possible outcomes:
* * A try or finally catcher is found => resume there.
* (or)
* * The error propagates to the bytecode executor entry
* level (and we're in the entry thread) => rethrow
* with a new longjmp(), after restoring the previous
* catchpoint.
* * The error is not caught in the current thread, so
* the thread finishes with an error. This works like
* a yielded error, except that the thread is finished
* and can no longer be resumed. (There is always a
* resumer in this case.)
*
* Note: until we hit the entry level, there can only be
* Ecmascript activations.
*/
duk_catcher *cat;
duk_hthread *resumer;
cat = thr->catchstack + thr->catchstack_top - 1;
while (cat >= thr->catchstack) {
if (thr == entry_thread &&
cat->callstack_index < entry_callstack_index) {
/* entry level reached */
break;
}
if (DUK_CAT_HAS_CATCH_ENABLED(cat)) {
DUK_ASSERT(DUK_CAT_GET_TYPE(cat) == DUK_CAT_TYPE_TCF);
duk__handle_catch(thr,
cat - thr->catchstack,
&thr->heap->lj.value1,
DUK_LJ_TYPE_THROW);
DUK_DD(DUK_DDPRINT("-> throw caught by a 'catch' clause, restart execution"));
retval = DUK__LONGJMP_RESTART;
goto wipe_and_return;
}
if (DUK_CAT_HAS_FINALLY_ENABLED(cat)) {
DUK_ASSERT(DUK_CAT_GET_TYPE(cat) == DUK_CAT_TYPE_TCF);
DUK_ASSERT(!DUK_CAT_HAS_CATCH_ENABLED(cat));
duk__handle_finally(thr,
cat - thr->catchstack,
&thr->heap->lj.value1,
DUK_LJ_TYPE_THROW);
DUK_DD(DUK_DDPRINT("-> throw caught by a 'finally' clause, restart execution"));
retval = DUK__LONGJMP_RESTART;
goto wipe_and_return;
}
cat--;
}
if (thr == entry_thread) {
/* not caught by anything before entry level; rethrow and let the
* final catcher unwind everything
*/
#if 0
duk_hthread_catchstack_unwind(thr, (cat - thr->catchstack) + 1); /* leave 'cat' as top catcher (also works if catchstack exhausted) */
duk_hthread_callstack_unwind(thr, entry_callstack_index + 1);
#endif
DUK_D(DUK_DPRINT("-> throw propagated up to entry level, rethrow and exit bytecode executor"));
retval = DUK__LONGJMP_RETHROW;
goto just_return;
/* Note: MUST NOT wipe_and_return here, as heap->lj must remain intact */
}
DUK_DD(DUK_DDPRINT("-> throw not caught by current thread, yield error to resumer and recheck longjmp"));
/* not caught by current thread, thread terminates (yield error to resumer);
* note that this may cause a cascade if the resumer terminates with an uncaught
* exception etc (this is OK, but needs careful testing)
*/
DUK_ASSERT(thr->resumer != NULL);
DUK_ASSERT(thr->resumer->callstack_top >= 2); /* Ecmascript activation + Duktape.Thread.resume() activation */
DUK_ASSERT(DUK_ACT_GET_FUNC(thr->resumer->callstack + thr->resumer->callstack_top - 1) != NULL &&
DUK_HOBJECT_IS_NATIVEFUNCTION(DUK_ACT_GET_FUNC(thr->resumer->callstack + thr->resumer->callstack_top - 1)) &&
((duk_hnativefunction *) DUK_ACT_GET_FUNC(thr->resumer->callstack + thr->resumer->callstack_top - 1))->func == duk_bi_thread_resume); /* Duktape.Thread.resume() */
DUK_ASSERT(DUK_ACT_GET_FUNC(thr->resumer->callstack + thr->resumer->callstack_top - 2) != NULL &&
DUK_HOBJECT_IS_COMPILEDFUNCTION(DUK_ACT_GET_FUNC(thr->resumer->callstack + thr->resumer->callstack_top - 2))); /* an Ecmascript function */
resumer = thr->resumer;
/* reset longjmp */
DUK_ASSERT(thr->heap->lj.type == DUK_LJ_TYPE_THROW); /* already set */
/* lj.value1 already set */
duk_hthread_terminate(thr); /* updates thread state, minimizes its allocations */
DUK_ASSERT(thr->state == DUK_HTHREAD_STATE_TERMINATED);
thr->resumer = NULL;
resumer->state = DUK_HTHREAD_STATE_RUNNING;
DUK_HEAP_SWITCH_THREAD(thr->heap, resumer);
thr = resumer;
goto check_longjmp;
}
case DUK_LJ_TYPE_BREAK: /* pseudotypes, not used in actual longjmps */
case DUK_LJ_TYPE_CONTINUE:
case DUK_LJ_TYPE_RETURN:
case DUK_LJ_TYPE_NORMAL:
default: {
/* should never happen, but be robust */
DUK_D(DUK_DPRINT("caught unknown longjmp type %ld, treat as internal error", (long) thr->heap->lj.type));
goto convert_to_internal_error;
}
} /* end switch */
DUK_UNREACHABLE();
wipe_and_return:
/* this is not strictly necessary, but helps debugging */
thr->heap->lj.type = DUK_LJ_TYPE_UNKNOWN;
thr->heap->lj.iserror = 0;
DUK_TVAL_SET_UNDEFINED_UPDREF(thr, &thr->heap->lj.value1); /* side effects */
DUK_TVAL_SET_UNDEFINED_UPDREF(thr, &thr->heap->lj.value2); /* side effects */
just_return:
return retval;
convert_to_internal_error:
/* This could also be thrown internally (set the error, goto check_longjmp),
* but it's better for internal errors to bubble outwards so that we won't
* infinite loop in this catchpoint.
*/
DUK_ERROR_INTERNAL_DEFMSG(thr);
DUK_UNREACHABLE();
return retval;
}
/* Handle a BREAK/CONTINUE opcode. Avoid using longjmp() for BREAK/CONTINUE
* handling because it has a measurable performance impact in ordinary
* environments and an extreme impact in Emscripten (GH-342).
*/
DUK_LOCAL void duk__handle_break_or_continue(duk_hthread *thr,
duk_uint_t label_id,
duk_small_uint_t lj_type) {
duk_catcher *cat;
duk_size_t orig_callstack_index;
DUK_ASSERT(thr != NULL);
/*
* Find a matching label catcher or 'finally' catcher in
* the same function.
*
* A label catcher must always exist and will match unless
* a 'finally' captures the break/continue first. It is the
* compiler's responsibility to ensure that labels are used
* correctly.
*/
/* Note: thr->catchstack_top may be 0, so that cat < thr->catchstack
* initially. This is OK and intended.
*/
cat = thr->catchstack + thr->catchstack_top - 1;
DUK_ASSERT(thr->callstack_top > 0);
orig_callstack_index = thr->callstack_top - 1;
DUK_DDD(DUK_DDDPRINT("handling break/continue with label=%ld, callstack index=%ld",
(long) label_id, (long) cat->callstack_index));
while (cat >= thr->catchstack) {
if (cat->callstack_index != orig_callstack_index) {
break;
}
DUK_DDD(DUK_DDDPRINT("considering catcher %ld: type=%ld label=%ld",
(long) (cat - thr->catchstack),
(long) DUK_CAT_GET_TYPE(cat),
(long) DUK_CAT_GET_LABEL(cat)));
if (DUK_CAT_GET_TYPE(cat) == DUK_CAT_TYPE_TCF &&
DUK_CAT_HAS_FINALLY_ENABLED(cat)) {
duk_size_t cat_idx;
duk_tval tv_tmp;
cat_idx = (duk_size_t) (cat - thr->catchstack); /* get before side effects */
DUK_TVAL_SET_FASTINT_U32(&tv_tmp, (duk_uint32_t) label_id);
duk__handle_finally(thr, cat_idx, &tv_tmp, lj_type);
DUK_DD(DUK_DDPRINT("-> break/continue caught by 'finally', restart execution"));
return;
}
if (DUK_CAT_GET_TYPE(cat) == DUK_CAT_TYPE_LABEL &&
(duk_uint_t) DUK_CAT_GET_LABEL(cat) == label_id) {
duk_size_t cat_idx;
cat_idx = (duk_size_t) (cat - thr->catchstack);
duk__handle_label(thr, cat_idx, lj_type);
DUK_DD(DUK_DDPRINT("-> break/continue caught by a label catcher (in the same function), restart execution"));
return;
}
cat--;
}
/* should never happen, but be robust */
DUK_D(DUK_DPRINT("-> break/continue not caught by anything in the current function (should never happen), throw internal error"));
DUK_ERROR_INTERNAL_DEFMSG(thr);
return;
}
/* Handle a RETURN opcode. Avoid using longjmp() for return handling because
* it has a measurable performance impact in ordinary environments and an extreme
* impact in Emscripten (GH-342). Return value is on value stack top.
*/
DUK_LOCAL duk_small_uint_t duk__handle_return(duk_hthread *thr,
duk_hthread *entry_thread,
duk_size_t entry_callstack_top) {
duk_tval *tv1;
duk_tval *tv2;
duk_hthread *resumer;
duk_catcher *cat;
duk_size_t new_cat_top;
duk_size_t orig_callstack_index;
/* We can directly access value stack here. */
DUK_ASSERT(thr != NULL);
DUK_ASSERT(entry_thread != NULL);
DUK_ASSERT(thr->valstack_top - 1 >= thr->valstack_bottom);
tv1 = thr->valstack_top - 1;
DUK_TVAL_CHKFAST_INPLACE(tv1); /* fastint downgrade check for return values */
/*
* Four possible outcomes:
*
* 1. A 'finally' in the same function catches the 'return'.
* It may continue to propagate when 'finally' is finished,
* or it may be neutralized by 'finally' (both handled by
* ENDFIN).
*
* 2. The return happens at the entry level of the bytecode
* executor, so return from the executor (in C stack).
*
* 3. There is a calling (Ecmascript) activation in the call
* stack => return to it, in the same executor instance.
*
* 4. There is no calling activation, and the thread is
* terminated. There is always a resumer in this case,
* which gets the return value similarly to a 'yield'
* (except that the current thread can no longer be
* resumed).
*/
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->callstack_top >= 1);
DUK_ASSERT(thr->catchstack != NULL);
/* XXX: does not work if thr->catchstack is NULL */
/* XXX: does not work if thr->catchstack is allocated but lowest pointer */
cat = thr->catchstack + thr->catchstack_top - 1; /* may be < thr->catchstack initially */
DUK_ASSERT(thr->callstack_top > 0); /* ensures callstack_top - 1 >= 0 */
orig_callstack_index = thr->callstack_top - 1;
while (cat >= thr->catchstack) {
if (cat->callstack_index != orig_callstack_index) {
break;
}
if (DUK_CAT_GET_TYPE(cat) == DUK_CAT_TYPE_TCF &&
DUK_CAT_HAS_FINALLY_ENABLED(cat)) {
duk_size_t cat_idx;
cat_idx = (duk_size_t) (cat - thr->catchstack); /* get before side effects */
DUK_ASSERT(thr->valstack_top - 1 >= thr->valstack_bottom);
duk__handle_finally(thr, cat_idx, thr->valstack_top - 1, DUK_LJ_TYPE_RETURN);
DUK_DD(DUK_DDPRINT("-> return caught by 'finally', restart execution"));
return DUK__RETHAND_RESTART;
}
cat--;
}
/* If out of catchstack, cat = thr->catchstack - 1;
* new_cat_top will be 0 in that case.
*/
new_cat_top = (duk_size_t) ((cat + 1) - thr->catchstack);
cat = NULL; /* avoid referencing, invalidated */
DUK_DDD(DUK_DDDPRINT("no catcher in catch stack, return to calling activation / yield"));
if (thr == entry_thread &&
thr->callstack_top == entry_callstack_top) {
/* Return to the bytecode executor caller which will unwind stacks.
* Return value is already on the stack top: [ ... retval ].
*/
/* XXX: could unwind catchstack here, so that call handling
* didn't need to do that?
*/
DUK_DDD(DUK_DDDPRINT("-> return propagated up to entry level, exit bytecode executor"));
return DUK__RETHAND_FINISHED;
}
if (thr->callstack_top >= 2) {
/* There is a caller; it MUST be an Ecmascript caller (otherwise it would
* match entry level check)
*/
DUK_DDD(DUK_DDDPRINT("return to Ecmascript caller, idx_retval=%ld, lj_value1=%!T",
(long) (thr->callstack + thr->callstack_top - 2)->idx_retval,
(duk_tval *) &thr->heap->lj.value1));
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 2))); /* must be ecmascript */
tv1 = thr->valstack + (thr->callstack + thr->callstack_top - 2)->idx_retval;
DUK_ASSERT(thr->valstack_top - 1 >= thr->valstack_bottom);
tv2 = thr->valstack_top - 1;
DUK_TVAL_SET_TVAL_UPDREF(thr, tv1, tv2); /* side effects */
DUK_DDD(DUK_DDDPRINT("return value at idx_retval=%ld is %!T",
(long) (thr->callstack + thr->callstack_top - 2)->idx_retval,
(duk_tval *) (thr->valstack + (thr->callstack + thr->callstack_top - 2)->idx_retval)));
duk_hthread_catchstack_unwind(thr, new_cat_top); /* leave 'cat' as top catcher (also works if catchstack exhausted) */
duk_hthread_callstack_unwind(thr, thr->callstack_top - 1);
duk__reconfig_valstack_ecma_return(thr, thr->callstack_top - 1);
DUK_DD(DUK_DDPRINT("-> return not intercepted, restart execution in caller"));
return DUK__RETHAND_RESTART;
}
DUK_DD(DUK_DDPRINT("no calling activation, thread finishes (similar to yield)"));
DUK_ASSERT(thr->resumer != NULL);
DUK_ASSERT(thr->resumer->callstack_top >= 2); /* Ecmascript activation + Duktape.Thread.resume() activation */
DUK_ASSERT(DUK_ACT_GET_FUNC(thr->resumer->callstack + thr->resumer->callstack_top - 1) != NULL &&
DUK_HOBJECT_IS_NATIVEFUNCTION(DUK_ACT_GET_FUNC(thr->resumer->callstack + thr->resumer->callstack_top - 1)) &&
((duk_hnativefunction *) DUK_ACT_GET_FUNC(thr->resumer->callstack + thr->resumer->callstack_top - 1))->func == duk_bi_thread_resume); /* Duktape.Thread.resume() */
DUK_ASSERT(DUK_ACT_GET_FUNC(thr->resumer->callstack + thr->resumer->callstack_top - 2) != NULL &&
DUK_HOBJECT_IS_COMPILEDFUNCTION(DUK_ACT_GET_FUNC(thr->resumer->callstack + thr->resumer->callstack_top - 2))); /* an Ecmascript function */
DUK_ASSERT_DISABLE((thr->resumer->callstack + thr->resumer->callstack_top - 2)->idx_retval >= 0); /* unsigned */
DUK_ASSERT(thr->state == DUK_HTHREAD_STATE_RUNNING);
DUK_ASSERT(thr->resumer->state == DUK_HTHREAD_STATE_RESUMED);
resumer = thr->resumer;
/* Share yield longjmp handler. */
DUK_ASSERT(thr->valstack_top - 1 >= thr->valstack_bottom);
duk__handle_yield(thr, resumer, resumer->callstack_top - 2, thr->valstack_top - 1);
duk_hthread_terminate(thr); /* updates thread state, minimizes its allocations */
DUK_ASSERT(thr->state == DUK_HTHREAD_STATE_TERMINATED);
thr->resumer = NULL;
resumer->state = DUK_HTHREAD_STATE_RUNNING;
DUK_HEAP_SWITCH_THREAD(thr->heap, resumer);
#if 0
thr = resumer; /* not needed */
#endif
DUK_DD(DUK_DDPRINT("-> return not caught, thread terminated; handle like yield, restart execution in resumer"));
return DUK__RETHAND_RESTART;
}
/*
* Executor interrupt handling
*
* The handler is called whenever the interrupt countdown reaches zero
* (or below). The handler must perform whatever checks are activated,
* e.g. check for cumulative step count to impose an execution step
* limit or check for breakpoints or other debugger interaction.
*
* When the actions are done, the handler must reinit the interrupt
* init and counter values. The 'init' value must indicate how many
* bytecode instructions are executed before the next interrupt. The
* counter must interface with the bytecode executor loop. Concretely,
* the new init value is normally one higher than the new counter value.
* For instance, to execute exactly one bytecode instruction the init
* value is set to 1 and the counter to 0. If an error is thrown by the
* interrupt handler, the counters are set to the same value (e.g. both
* to 0 to cause an interrupt when the next bytecode instruction is about
* to be executed after error handling).
*
* Maintaining the init/counter value properly is important for accurate
* behavior. For instance, executor step limit needs a cumulative step
* count which is simply computed as a sum of 'init' values. This must
* work accurately even when single stepping.
*/
#if defined(DUK_USE_INTERRUPT_COUNTER)
#define DUK__INT_NOACTION 0 /* no specific action, resume normal execution */
#define DUK__INT_RESTART 1 /* must "goto restart_execution", e.g. breakpoints changed */
#if defined(DUK_USE_DEBUGGER_SUPPORT)
DUK_LOCAL void duk__interrupt_handle_debugger(duk_hthread *thr, duk_bool_t *out_immediate, duk_small_uint_t *out_interrupt_retval) {
duk_context *ctx;
duk_activation *act;
duk_breakpoint *bp;
duk_breakpoint **bp_active;
duk_uint_fast32_t line = 0;
duk_bool_t process_messages;
duk_bool_t processed_messages = 0;
DUK_ASSERT(thr->heap->dbg_processing == 0); /* don't re-enter e.g. during Eval */
ctx = (duk_context *) thr;
act = thr->callstack + thr->callstack_top - 1;
/* It might seem that replacing 'thr->heap' with just 'heap' below
* might be a good idea, but it increases code size slightly
* (probably due to unnecessary spilling) at least on x64.
*/
/*
* Breakpoint and step state checks
*/
if (act->flags & DUK_ACT_FLAG_BREAKPOINT_ACTIVE ||
(thr->heap->dbg_step_thread == thr &&
thr->heap->dbg_step_csindex == thr->callstack_top - 1)) {
line = duk_debug_curr_line(thr);
if (act->prev_line != line) {
/* Stepped? Step out is handled by callstack unwind. */
if ((thr->heap->dbg_step_type == DUK_STEP_TYPE_INTO ||
thr->heap->dbg_step_type == DUK_STEP_TYPE_OVER) &&
(thr->heap->dbg_step_thread == thr) &&
(thr->heap->dbg_step_csindex == thr->callstack_top - 1) &&
(line != thr->heap->dbg_step_startline)) {
DUK_D(DUK_DPRINT("STEP STATE TRIGGERED PAUSE at line %ld",
(long) line));
DUK_HEAP_SET_PAUSED(thr->heap);
}
/* Check for breakpoints only on line transition.
* Breakpoint is triggered when we enter the target
* line from a different line, and the previous line
* was within the same function.
*
* This condition is tricky: the condition used to be
* that transition to -or across- the breakpoint line
* triggered the breakpoint. This seems intuitively
* better because it handles breakpoints on lines with
* no emitted opcodes; but this leads to the issue
* described in: https://github.com/svaarala/duktape/issues/263.
*/
bp_active = thr->heap->dbg_breakpoints_active;
for (;;) {
bp = *bp_active++;
if (bp == NULL) {
break;
}
DUK_ASSERT(bp->filename != NULL);
if (act->prev_line != bp->line && line == bp->line) {
DUK_D(DUK_DPRINT("BREAKPOINT TRIGGERED at %!O:%ld",
(duk_heaphdr *) bp->filename, (long) bp->line));
DUK_HEAP_SET_PAUSED(thr->heap);
}
}
} else {
;
}
act->prev_line = line;
}
/*
* Rate limit check for sending status update or peeking into
* the debug transport. Both can be expensive operations that
* we don't want to do on every opcode.
*
* Making sure the interval remains reasonable on a wide variety
* of targets and bytecode is difficult without a timestamp, so
* we use a Date-provided timestamp for the rate limit check.
* But since it's also expensive to get a timestamp, a bytecode
* counter is used to rate limit getting timestamps.
*/
process_messages = 0;
if (thr->heap->dbg_state_dirty || thr->heap->dbg_paused || thr->heap->dbg_detaching) {
/* Enter message processing loop for sending Status notifys and
* to finish a pending detach.
*/
process_messages = 1;
}
/* XXX: remove heap->dbg_exec_counter, use heap->inst_count_interrupt instead? */
thr->heap->dbg_exec_counter += thr->interrupt_init;
if (thr->heap->dbg_exec_counter - thr->heap->dbg_last_counter >= DUK_HEAP_DBG_RATELIMIT_OPCODES) {
/* Overflow of the execution counter is fine and doesn't break
* anything here.
*/
duk_double_t now, diff_last;
thr->heap->dbg_last_counter = thr->heap->dbg_exec_counter;
now = DUK_USE_DATE_GET_NOW(ctx);
diff_last = now - thr->heap->dbg_last_time;
if (diff_last < 0.0 || diff_last >= (duk_double_t) DUK_HEAP_DBG_RATELIMIT_MILLISECS) {
/* Negative value checked so that a "time jump" works
* reasonably.
*
* Same interval is now used for status sending and
* peeking.
*/
thr->heap->dbg_last_time = now;
thr->heap->dbg_state_dirty = 1;
process_messages = 1;
}
}
/*
* Process messages and send status if necessary.
*
* If we're paused, we'll block for new messages. If we're not
* paused, we'll process anything we can peek but won't block
* for more. Detach (and re-attach) handling is all localized
* to duk_debug_process_messages() too.
*
* Debugger writes outside the message loop may cause debugger
* detach1 phase to run, after which dbg_read_cb == NULL and
* dbg_detaching != 0. The message loop will finish the detach
* by running detach2 phase, so enter the message loop also when
* detaching.
*/
act = NULL; /* may be changed */
if (process_messages) {
DUK_ASSERT(thr->heap->dbg_processing == 0);
processed_messages = duk_debug_process_messages(thr, 0 /*no_block*/);
DUK_ASSERT(thr->heap->dbg_processing == 0);
}
/* Continue checked execution if there are breakpoints or we're stepping.
* Also use checked execution if paused flag is active - it shouldn't be
* because the debug message loop shouldn't terminate if it was. Step out
* is handled by callstack unwind and doesn't need checked execution.
* Note that debugger may have detached due to error or explicit request
* above, so we must recheck attach status.
*/
if (DUK_HEAP_IS_DEBUGGER_ATTACHED(thr->heap)) {
act = thr->callstack + thr->callstack_top - 1; /* relookup, may have changed */
if (act->flags & DUK_ACT_FLAG_BREAKPOINT_ACTIVE ||
((thr->heap->dbg_step_type == DUK_STEP_TYPE_INTO ||
thr->heap->dbg_step_type == DUK_STEP_TYPE_OVER) &&
thr->heap->dbg_step_thread == thr &&
thr->heap->dbg_step_csindex == thr->callstack_top - 1) ||
thr->heap->dbg_paused) {
*out_immediate = 1;
}
/* If we processed any debug messages breakpoints may have
* changed; restart execution to re-check active breakpoints.
*/
if (processed_messages) {
DUK_D(DUK_DPRINT("processed debug messages, restart execution to recheck possibly changed breakpoints"));
*out_interrupt_retval = DUK__INT_RESTART;
}
} else {
DUK_D(DUK_DPRINT("debugger became detached, resume normal execution"));
}
}
#endif /* DUK_USE_DEBUGGER_SUPPORT */
DUK_LOCAL duk_small_uint_t duk__executor_interrupt(duk_hthread *thr) {
duk_int_t ctr;
duk_activation *act;
duk_hcompiledfunction *fun;
duk_bool_t immediate = 0;
duk_small_uint_t retval;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
DUK_ASSERT(thr->callstack != NULL);
DUK_ASSERT(thr->callstack_top > 0);
#if defined(DUK_USE_DEBUG)
thr->heap->inst_count_interrupt += thr->interrupt_init;
DUK_DD(DUK_DDPRINT("execution interrupt, counter=%ld, init=%ld, "
"instruction counts: executor=%ld, interrupt=%ld",
(long) thr->interrupt_counter, (long) thr->interrupt_init,
(long) thr->heap->inst_count_exec, (long) thr->heap->inst_count_interrupt));
#endif
retval = DUK__INT_NOACTION;
ctr = DUK_HTHREAD_INTCTR_DEFAULT;
/*
* Avoid nested calls. Concretely this happens during debugging, e.g.
* when we eval() an expression.
*
* Also don't interrupt if we're currently doing debug processing
* (which can be initiated outside the bytecode executor) as this
* may cause the debugger to be called recursively. Check required
* for correct operation of throw intercept and other "exotic" halting
* scenarios.
*/
#if defined(DUK_USE_DEBUGGER_SUPPORT)
if (DUK_HEAP_HAS_INTERRUPT_RUNNING(thr->heap) || thr->heap->dbg_processing) {
#else
if (DUK_HEAP_HAS_INTERRUPT_RUNNING(thr->heap)) {
#endif
DUK_DD(DUK_DDPRINT("nested executor interrupt, ignoring"));
/* Set a high interrupt counter; the original executor
* interrupt invocation will rewrite before exiting.
*/
thr->interrupt_init = ctr;
thr->interrupt_counter = ctr - 1;
return DUK__INT_NOACTION;
}
DUK_HEAP_SET_INTERRUPT_RUNNING(thr->heap);
act = thr->callstack + thr->callstack_top - 1;
fun = (duk_hcompiledfunction *) DUK_ACT_GET_FUNC(act);
DUK_ASSERT(DUK_HOBJECT_HAS_COMPILEDFUNCTION((duk_hobject *) fun));
DUK_UNREF(fun);
#if defined(DUK_USE_EXEC_TIMEOUT_CHECK)
/*
* Execution timeout check
*/
if (DUK_USE_EXEC_TIMEOUT_CHECK(thr->heap->heap_udata)) {
/* Keep throwing an error whenever we get here. The unusual values
* are set this way because no instruction is ever executed, we just
* throw an error until all try/catch/finally and other catchpoints
* have been exhausted. Duktape/C code gets control at each protected
* call but whenever it enters back into Duktape the RangeError gets
* raised. User exec timeout check must consistently indicate a timeout
* until we've fully bubbled out of Duktape.
*/
DUK_D(DUK_DPRINT("execution timeout, throwing a RangeError"));
thr->interrupt_init = 0;
thr->interrupt_counter = 0;
DUK_HEAP_CLEAR_INTERRUPT_RUNNING(thr->heap);
DUK_ERROR_RANGE(thr, "execution timeout");
}
#endif /* DUK_USE_EXEC_TIMEOUT_CHECK */
#if defined(DUK_USE_DEBUGGER_SUPPORT)
if (!thr->heap->dbg_processing &&
(thr->heap->dbg_read_cb != NULL || thr->heap->dbg_detaching)) {
/* Avoid recursive re-entry; enter when we're attached or
* detaching (to finish off the pending detach).
*/
duk__interrupt_handle_debugger(thr, &immediate, &retval);
act = thr->callstack + thr->callstack_top - 1; /* relookup if changed */
DUK_UNREF(act); /* 'act' is no longer accessed, scanbuild fix */
}
#endif /* DUK_USE_DEBUGGER_SUPPORT */
/*
* Update the interrupt counter
*/
if (immediate) {
/* Cause an interrupt after executing one instruction. */
ctr = 1;
}
/* The counter value is one less than the init value: init value should
* indicate how many instructions are executed before interrupt. To
* execute 1 instruction (after interrupt handler return), counter must
* be 0.
*/
DUK_ASSERT(ctr >= 1);
thr->interrupt_init = ctr;
thr->interrupt_counter = ctr - 1;
DUK_HEAP_CLEAR_INTERRUPT_RUNNING(thr->heap);
return retval;
}
#endif /* DUK_USE_INTERRUPT_COUNTER */
/*
* Debugger handling for executor restart
*
* Check for breakpoints, stepping, etc, and figure out if we should execute
* in checked or normal mode. Note that we can't do this when an activation
* is created, because breakpoint status (and stepping status) may change
* later, so we must recheck every time we're executing an activation.
* This primitive should be side effect free to avoid changes during check.
*/
#if defined(DUK_USE_DEBUGGER_SUPPORT)
DUK_LOCAL void duk__executor_recheck_debugger(duk_hthread *thr, duk_activation *act, duk_hcompiledfunction *fun) {
duk_heap *heap;
duk_tval *tv_tmp;
duk_hstring *filename;
duk_small_uint_t bp_idx;
duk_breakpoint **bp_active;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(act != NULL);
DUK_ASSERT(fun != NULL);
heap = thr->heap;
bp_active = heap->dbg_breakpoints_active;
act->flags &= ~DUK_ACT_FLAG_BREAKPOINT_ACTIVE;
tv_tmp = duk_hobject_find_existing_entry_tval_ptr(thr->heap, (duk_hobject *) fun, DUK_HTHREAD_STRING_FILE_NAME(thr));
if (tv_tmp && DUK_TVAL_IS_STRING(tv_tmp)) {
filename = DUK_TVAL_GET_STRING(tv_tmp);
/* Figure out all active breakpoints. A breakpoint is
* considered active if the current function's fileName
* matches the breakpoint's fileName, AND there is no
* inner function that has matching line numbers
* (otherwise a breakpoint would be triggered both
* inside and outside of the inner function which would
* be confusing). Example:
*
* function foo() {
* print('foo');
* function bar() { <-. breakpoints in these
* print('bar'); | lines should not affect
* } <-' foo() execution
* bar();
* }
*
* We need a few things that are only available when
* debugger support is enabled: (1) a line range for
* each function, and (2) access to the function
* template to access the inner functions (and their
* line ranges).
*
* It's important to have a narrow match for active
* breakpoints so that we don't enter checked execution
* when that's not necessary. For instance, if we're
* running inside a certain function and there's
* breakpoint outside in (after the call site), we
* don't want to slow down execution of the function.
*/
for (bp_idx = 0; bp_idx < heap->dbg_breakpoint_count; bp_idx++) {
duk_breakpoint *bp = heap->dbg_breakpoints + bp_idx;
duk_hobject **funcs, **funcs_end;
duk_hcompiledfunction *inner_fun;
duk_bool_t bp_match;
if (bp->filename == filename &&
bp->line >= fun->start_line && bp->line <= fun->end_line) {
bp_match = 1;
DUK_DD(DUK_DDPRINT("breakpoint filename and line match: "
"%s:%ld vs. %s (line %ld vs. %ld-%ld)",
DUK_HSTRING_GET_DATA(bp->filename),
(long) bp->line,
DUK_HSTRING_GET_DATA(filename),
(long) bp->line,
(long) fun->start_line,
(long) fun->end_line));
funcs = DUK_HCOMPILEDFUNCTION_GET_FUNCS_BASE(thr->heap, fun);
funcs_end = DUK_HCOMPILEDFUNCTION_GET_FUNCS_END(thr->heap, fun);
while (funcs != funcs_end) {
inner_fun = (duk_hcompiledfunction *) *funcs;
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION((duk_hobject *) inner_fun));
if (bp->line >= inner_fun->start_line && bp->line <= inner_fun->end_line) {
DUK_DD(DUK_DDPRINT("inner function masks ('captures') breakpoint"));
bp_match = 0;
break;
}
funcs++;
}
if (bp_match) {
/* No need to check for size of bp_active list,
* it's always larger than maximum number of
* breakpoints.
*/
act->flags |= DUK_ACT_FLAG_BREAKPOINT_ACTIVE;
*bp_active = heap->dbg_breakpoints + bp_idx;
bp_active++;
}
}
}
}
*bp_active = NULL; /* terminate */
DUK_DD(DUK_DDPRINT("ACTIVE BREAKPOINTS: %ld", (long) (bp_active - thr->heap->dbg_breakpoints_active)));
/* Force pause if we were doing "step into" in another activation. */
if (thr->heap->dbg_step_thread != NULL &&
thr->heap->dbg_step_type == DUK_STEP_TYPE_INTO &&
(thr->heap->dbg_step_thread != thr ||
thr->heap->dbg_step_csindex != thr->callstack_top - 1)) {
DUK_D(DUK_DPRINT("STEP INTO ACTIVE, FORCE PAUSED"));
DUK_HEAP_SET_PAUSED(thr->heap);
}
/* Force interrupt right away if we're paused or in "checked mode".
* Step out is handled by callstack unwind.
*/
if (act->flags & (DUK_ACT_FLAG_BREAKPOINT_ACTIVE) ||
thr->heap->dbg_paused ||
(thr->heap->dbg_step_type != DUK_STEP_TYPE_OUT &&
thr->heap->dbg_step_csindex == thr->callstack_top - 1)) {
/* We'll need to interrupt early so recompute the init
* counter to reflect the number of bytecode instructions
* executed so that step counts for e.g. debugger rate
* limiting are accurate.
*/
DUK_ASSERT(thr->interrupt_counter <= thr->interrupt_init);
thr->interrupt_init = thr->interrupt_init - thr->interrupt_counter;
thr->interrupt_counter = 0;
}
}
#endif /* DUK_USE_DEBUGGER_SUPPORT */
/*
* Ecmascript bytecode executor.
*
* Resume execution for the current thread from its current activation.
* Returns when execution would return from the entry level activation,
* leaving a single return value on top of the stack. Function calls
* and thread resumptions are handled internally. If an error occurs,
* a longjmp() with type DUK_LJ_TYPE_THROW is called on the entry level
* setjmp() jmpbuf.
*
* Ecmascript function calls and coroutine resumptions are handled
* internally (by the outer executor function) without recursive C calls.
* Other function calls are handled using duk_handle_call(), increasing
* C recursion depth.
*
* Abrupt completions (= long control tranfers) are handled either
* directly by reconfiguring relevant stacks and restarting execution,
* or via a longjmp. Longjmp-free handling is preferable for performance
* (especially Emscripten performance), and is used for: break, continue,
* and return.
*
* For more detailed notes, see doc/execution.rst.
*
* Also see doc/code-issues.rst for discussion of setjmp(), longjmp(),
* and volatile.
*/
/* Presence of 'fun' is config based, there's a marginal performance
* difference and the best option is architecture dependent.
*/
#if defined(DUK_USE_EXEC_FUN_LOCAL)
#define DUK__FUN() fun
#else
#define DUK__FUN() ((duk_hcompiledfunction *) DUK_ACT_GET_FUNC((thr)->callstack + (thr)->callstack_top - 1))
#endif
#define DUK__STRICT() (DUK_HOBJECT_HAS_STRICT((duk_hobject *) DUK__FUN()))
/* Reg/const access macros: these are very footprint and performance sensitive
* so modify with care.
*/
#define DUK__REG(x) (*(thr->valstack_bottom + (x)))
#define DUK__REGP(x) (thr->valstack_bottom + (x))
#define DUK__CONST(x) (*(consts + (x)))
#define DUK__CONSTP(x) (consts + (x))
#if 0
#define DUK__REGCONST(x) ((x) < DUK_BC_REGLIMIT ? DUK__REG((x)) : DUK__CONST((x) - DUK_BC_REGLIMIT))
#define DUK__REGCONSTP(x) ((x) < DUK_BC_REGLIMIT ? DUK__REGP((x)) : DUK__CONSTP((x) - DUK_BC_REGLIMIT))
#define DUK__REGCONST(x) *((((x) < DUK_BC_REGLIMIT ? thr->valstack_bottom : consts2) + (x)))
#define DUK__REGCONSTP(x) (((x) < DUK_BC_REGLIMIT ? thr->valstack_bottom : consts2) + (x))
#endif
/* This macro works when a regconst field is 9 bits, [0,0x1ff]. Adding
* DUK_LIKELY/DUK_UNLIKELY increases code footprint and doesn't seem to
* improve performance on x64 (and actually harms performance in some tests).
*/
#define DUK__RCISREG(x) (((x) & 0x100) == 0)
#define DUK__REGCONST(x) (*((DUK__RCISREG((x)) ? thr->valstack_bottom : consts2) + (x)))
#define DUK__REGCONSTP(x) ((DUK__RCISREG((x)) ? thr->valstack_bottom : consts2) + (x))
#ifdef DUK_USE_VERBOSE_EXECUTOR_ERRORS
#define DUK__INTERNAL_ERROR(msg) do { \
DUK_ERROR_INTERNAL(thr, (msg)); \
} while (0)
#else
#define DUK__INTERNAL_ERROR(msg) do { \
goto internal_error; \
} while (0)
#endif
#define DUK__SYNC_CURR_PC() do { \
duk_activation *act; \
act = thr->callstack + thr->callstack_top - 1; \
act->curr_pc = curr_pc; \
} while (0)
#define DUK__SYNC_AND_NULL_CURR_PC() do { \
duk_activation *act; \
act = thr->callstack + thr->callstack_top - 1; \
act->curr_pc = curr_pc; \
thr->ptr_curr_pc = NULL; \
} while (0)
DUK_LOCAL void duk__handle_executor_error(duk_heap *heap,
duk_hthread *entry_thread,
duk_size_t entry_callstack_top,
duk_int_t entry_call_recursion_depth,
duk_jmpbuf *entry_jmpbuf_ptr) {
duk_small_uint_t lj_ret;
/* Longjmp callers are required to sync-and-null thr->ptr_curr_pc
* before longjmp.
*/
DUK_ASSERT(heap->curr_thread != NULL);
DUK_ASSERT(heap->curr_thread->ptr_curr_pc == NULL);
/* XXX: signalling the need to shrink check (only if unwound) */
/* Must be restored here to handle e.g. yields properly. */
heap->call_recursion_depth = entry_call_recursion_depth;
/* Switch to caller's setjmp() catcher so that if an error occurs
* during error handling, it is always propagated outwards instead
* of causing an infinite loop in our own handler.
*/
heap->lj.jmpbuf_ptr = (duk_jmpbuf *) entry_jmpbuf_ptr;
lj_ret = duk__handle_longjmp(heap->curr_thread, entry_thread, entry_callstack_top);
if (lj_ret == DUK__LONGJMP_RESTART) {
/* Restart bytecode execution, possibly with a changed thread. */
;
} else {
/* Rethrow error to calling state. */
DUK_ASSERT(lj_ret == DUK__LONGJMP_RETHROW);
/* Longjmp handling has restored jmpbuf_ptr. */
DUK_ASSERT(heap->lj.jmpbuf_ptr == entry_jmpbuf_ptr);
/* Thread may have changed, e.g. YIELD converted to THROW. */
duk_err_longjmp(heap->curr_thread);
DUK_UNREACHABLE();
}
}
/* Outer executor with setjmp/longjmp handling. */
DUK_INTERNAL void duk_js_execute_bytecode(duk_hthread *exec_thr) {
/* Entry level info. */
duk_hthread *entry_thread;
duk_size_t entry_callstack_top;
duk_int_t entry_call_recursion_depth;
duk_jmpbuf *entry_jmpbuf_ptr;
duk_jmpbuf our_jmpbuf;
duk_heap *heap;
DUK_ASSERT(exec_thr != NULL);
DUK_ASSERT(exec_thr->heap != NULL);
DUK_ASSERT(exec_thr->heap->curr_thread != NULL);
DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR((duk_heaphdr *) exec_thr);
DUK_ASSERT(exec_thr->callstack_top >= 1); /* at least one activation, ours */
DUK_ASSERT(DUK_ACT_GET_FUNC(exec_thr->callstack + exec_thr->callstack_top - 1) != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION(DUK_ACT_GET_FUNC(exec_thr->callstack + exec_thr->callstack_top - 1)));
entry_thread = exec_thr;
heap = entry_thread->heap;
entry_callstack_top = entry_thread->callstack_top;
entry_call_recursion_depth = entry_thread->heap->call_recursion_depth;
entry_jmpbuf_ptr = entry_thread->heap->lj.jmpbuf_ptr;
/*
* Note: we currently assume that the setjmp() catchpoint is
* not re-entrant (longjmp() cannot be called more than once
* for a single setjmp()).
*
* See doc/code-issues.rst for notes on variable assignment
* before and after setjmp().
*/
for (;;) {
heap->lj.jmpbuf_ptr = &our_jmpbuf;
DUK_ASSERT(heap->lj.jmpbuf_ptr != NULL);
#if defined(DUK_USE_CPP_EXCEPTIONS)
try {
#else
DUK_ASSERT(heap->lj.jmpbuf_ptr == &our_jmpbuf);
if (DUK_SETJMP(our_jmpbuf.jb) == 0) {
#endif
/* Execute bytecode until returned or longjmp(). */
duk__js_execute_bytecode_inner(entry_thread, entry_callstack_top);
/* Successful return: restore jmpbuf and return to caller. */
heap->lj.jmpbuf_ptr = entry_jmpbuf_ptr;
return;
#if defined(DUK_USE_CPP_EXCEPTIONS)
} catch (duk_internal_exception &exc) {
#else
} else {
#endif
#if defined(DUK_USE_CPP_EXCEPTIONS)
DUK_UNREF(exc);
#endif
DUK_DDD(DUK_DDDPRINT("longjmp caught by bytecode executor"));
duk__handle_executor_error(heap,
entry_thread,
entry_callstack_top,
entry_call_recursion_depth,
entry_jmpbuf_ptr);
}
#if defined(DUK_USE_CPP_EXCEPTIONS)
catch (std::exception &exc) {
const char *what = exc.what();
if (!what) {
what = "unknown";
}
DUK_D(DUK_DPRINT("unexpected c++ std::exception (perhaps thrown by user code)"));
try {
DUK_ASSERT(heap->curr_thread != NULL);
DUK_ERROR_FMT1(heap->curr_thread, DUK_ERR_API_ERROR, "caught invalid c++ std::exception '%s' (perhaps thrown by user code)", what);
} catch (duk_internal_exception exc) {
DUK_D(DUK_DPRINT("caught api error thrown from unexpected c++ std::exception"));
DUK_UNREF(exc);
duk__handle_executor_error(heap,
entry_thread,
entry_callstack_top,
entry_call_recursion_depth,
entry_jmpbuf_ptr);
}
} catch (...) {
DUK_D(DUK_DPRINT("unexpected c++ exception (perhaps thrown by user code)"));
try {
DUK_ASSERT(heap->curr_thread != NULL);
DUK_ERROR_API(heap->curr_thread, "caught invalid c++ exception (perhaps thrown by user code)");
} catch (duk_internal_exception exc) {
DUK_D(DUK_DPRINT("caught api error thrown from unexpected c++ exception"));
DUK_UNREF(exc);
duk__handle_executor_error(heap,
entry_thread,
entry_callstack_top,
entry_call_recursion_depth,
entry_jmpbuf_ptr);
}
}
#endif
}
DUK_UNREACHABLE();
}
/* Inner executor, performance critical. */
DUK_LOCAL DUK_NOINLINE void duk__js_execute_bytecode_inner(duk_hthread *entry_thread, duk_size_t entry_callstack_top) {
/* Current PC, accessed by other functions through thr->ptr_to_curr_pc.
* Critical for performance. It would be safest to make this volatile,
* but that eliminates performance benefits; aliasing guarantees
* should be enough though.
*/
duk_instr_t *curr_pc; /* bytecode has a stable pointer */
/* Hot variables for interpretation. Critical for performance,
* but must add sparingly to minimize register shuffling.
*/
duk_hthread *thr; /* stable */
duk_tval *consts; /* stable */
duk_tval *consts2; /* stable; precalculated for faster lookups */
duk_uint_fast32_t ins;
/* 'funcs' is quite rarely used, so no local for it */
#if defined(DUK_USE_EXEC_FUN_LOCAL)
duk_hcompiledfunction *fun;
#else
/* 'fun' is quite rarely used, so no local for it */
#endif
#ifdef DUK_USE_INTERRUPT_COUNTER
duk_int_t int_ctr;
#endif
#ifdef DUK_USE_ASSERTIONS
duk_size_t valstack_top_base; /* valstack top, should match before interpreting each op (no leftovers) */
#endif
/*
* Restart execution by reloading thread state.
*
* Note that 'thr' and any thread configuration may have changed,
* so all local variables are suspect and we need to reinitialize.
*
* The number of local variables should be kept to a minimum: if
* the variables are spilled, they will need to be loaded from
* memory anyway.
*
* Any 'goto restart_execution;' code path in opcode dispatch must
* ensure 'curr_pc' is synced back to act->curr_pc before the goto
* takes place.
*
* The interpreter must be very careful with memory pointers, as
* many pointers are not guaranteed to be 'stable' and may be
* reallocated and relocated on-the-fly quite easily (e.g. by a
* memory allocation or a property access).
*
* The following are assumed to have stable pointers:
* - the current thread
* - the current function
* - the bytecode, constant table, inner function table of the
* current function (as they are a part of the function allocation)
*
* The following are assumed to have semi-stable pointers:
* - the current activation entry: stable as long as callstack
* is not changed (reallocated by growing or shrinking), or
* by any garbage collection invocation (through finalizers)
* - Note in particular that ANY DECREF can invalidate the
* activation pointer, so for the most part a fresh lookup
* is required
*
* The following are not assumed to have stable pointers at all:
* - the value stack (registers) of the current thread
* - the catch stack of the current thread
*
* See execution.rst for discussion.
*/
restart_execution:
/* Lookup current thread; use the stable 'entry_thread' for this to
* avoid clobber warnings. Any valid, reachable 'thr' value would be
* fine for this, so using 'entry_thread' is just to silence warnings.
*/
thr = entry_thread->heap->curr_thread;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->callstack_top >= 1);
DUK_ASSERT(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 1) != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION(DUK_ACT_GET_FUNC(thr->callstack + thr->callstack_top - 1)));
thr->ptr_curr_pc = &curr_pc;
/* Relookup and initialize dispatch loop variables. Debugger check. */
{
duk_activation *act;
#if !defined(DUK_USE_EXEC_FUN_LOCAL)
duk_hcompiledfunction *fun;
#endif
/* Assume interrupt init/counter are properly initialized here. */
/* Assume that thr->valstack_bottom has been set-up before getting here. */
act = thr->callstack + thr->callstack_top - 1;
fun = (duk_hcompiledfunction *) DUK_ACT_GET_FUNC(act);
DUK_ASSERT(fun != NULL);
DUK_ASSERT(thr->valstack_top - thr->valstack_bottom == fun->nregs);
consts = DUK_HCOMPILEDFUNCTION_GET_CONSTS_BASE(thr->heap, fun);
DUK_ASSERT(consts != NULL);
consts2 = consts - DUK_BC_REGLIMIT;
#if defined(DUK_USE_DEBUGGER_SUPPORT)
if (DUK_HEAP_IS_DEBUGGER_ATTACHED(thr->heap) && !thr->heap->dbg_processing) {
duk__executor_recheck_debugger(thr, act, fun);
act = thr->callstack + thr->callstack_top - 1; /* relookup after side effects (no side effects currently however) */
}
#endif /* DUK_USE_DEBUGGER_SUPPORT */
#ifdef DUK_USE_ASSERTIONS
valstack_top_base = (duk_size_t) (thr->valstack_top - thr->valstack);
#endif
/* Set up curr_pc for opcode dispatch. */
curr_pc = act->curr_pc;
}
DUK_DD(DUK_DDPRINT("restarting execution, thr %p, act idx %ld, fun %p,"
"consts %p, funcs %p, lev %ld, regbot %ld, regtop %ld, catchstack_top=%ld, "
"preventcount=%ld",
(void *) thr,
(long) (thr->callstack_top - 1),
(void *) DUK__FUN(),
(void *) DUK_HCOMPILEDFUNCTION_GET_CONSTS_BASE(thr->heap, DUK__FUN()),
(void *) DUK_HCOMPILEDFUNCTION_GET_FUNCS_BASE(thr->heap, DUK__FUN()),
(long) (thr->callstack_top - 1),
(long) (thr->valstack_bottom - thr->valstack),
(long) (thr->valstack_top - thr->valstack),
(long) thr->catchstack_top,
(long) thr->callstack_preventcount));
/* Dispatch loop. */
for (;;) {
DUK_ASSERT(thr->callstack_top >= 1);
DUK_ASSERT(thr->valstack_top - thr->valstack_bottom == DUK__FUN()->nregs);
DUK_ASSERT((duk_size_t) (thr->valstack_top - thr->valstack) == valstack_top_base);
/* Executor interrupt counter check, used to implement breakpoints,
* debugging interface, execution timeouts, etc. The counter is heap
* specific but is maintained in the current thread to make the check
* as fast as possible. The counter is copied back to the heap struct
* whenever a thread switch occurs by the DUK_HEAP_SWITCH_THREAD() macro.
*/
#if defined(DUK_USE_INTERRUPT_COUNTER)
int_ctr = thr->interrupt_counter;
if (DUK_LIKELY(int_ctr > 0)) {
thr->interrupt_counter = int_ctr - 1;
} else {
/* Trigger at zero or below */
duk_small_uint_t exec_int_ret;
/* Write curr_pc back for the debugger. */
DUK_ASSERT(thr->callstack_top > 0);
{
duk_activation *act;
act = thr->callstack + thr->callstack_top - 1;
act->curr_pc = (duk_instr_t *) curr_pc;
}
/* Force restart caused by a function return; must recheck
* debugger breakpoints before checking line transitions,
* see GH-303. Restart and then handle interrupt_counter
* zero again.
*/
#if defined(DUK_USE_DEBUGGER_SUPPORT)
if (thr->heap->dbg_force_restart) {
DUK_DD(DUK_DDPRINT("dbg_force_restart flag forced restart execution")); /* GH-303 */
thr->heap->dbg_force_restart = 0;
goto restart_execution;
}
#endif
exec_int_ret = duk__executor_interrupt(thr);
if (exec_int_ret == DUK__INT_RESTART) {
/* curr_pc synced back above */
goto restart_execution;
}
}
#endif /* DUK_USE_INTERRUPT_COUNTER */
#if defined(DUK_USE_INTERRUPT_COUNTER) && defined(DUK_USE_DEBUG)
/* For cross-checking during development: ensure dispatch count
* matches cumulative interrupt counter init value sums.
*/
thr->heap->inst_count_exec++;
#endif
#if defined(DUK_USE_ASSERTIONS) || defined(DUK_USE_DEBUG)
{
duk_activation *act;
act = thr->callstack + thr->callstack_top - 1;
DUK_ASSERT(curr_pc >= DUK_HCOMPILEDFUNCTION_GET_CODE_BASE(thr->heap, DUK__FUN()));
DUK_ASSERT(curr_pc < DUK_HCOMPILEDFUNCTION_GET_CODE_END(thr->heap, DUK__FUN()));
DUK_UNREF(act); /* if debugging disabled */
DUK_DDD(DUK_DDDPRINT("executing bytecode: pc=%ld, ins=0x%08lx, op=%ld, valstack_top=%ld/%ld, nregs=%ld --> %!I",
(long) (curr_pc - DUK_HCOMPILEDFUNCTION_GET_CODE_BASE(thr->heap, DUK__FUN())),
(unsigned long) *curr_pc,
(long) DUK_DEC_OP(*curr_pc),
(long) (thr->valstack_top - thr->valstack),
(long) (thr->valstack_end - thr->valstack),
(long) (DUK__FUN() ? DUK__FUN()->nregs : -1),
(duk_instr_t) *curr_pc));
}
#endif
#if defined(DUK_USE_ASSERTIONS)
/* Quite heavy assert: check valstack policy. Improper
* shuffle instructions can write beyond valstack_top/end
* so this check catches them in the act.
*/
{
duk_tval *tv;
tv = thr->valstack_top;
while (tv != thr->valstack_end) {
DUK_ASSERT(DUK_TVAL_IS_UNDEFINED(tv));
tv++;
}
}
#endif
ins = *curr_pc++;
/* Typing: use duk_small_(u)int_fast_t when decoding small
* opcode fields (op, A, B, C) and duk_(u)int_fast_t when
* decoding larger fields (e.g. BC which is 18 bits). Use
* unsigned variant by default, signed when the value is used
* in signed arithmetic. Using variable names such as 'a', 'b',
* 'c', 'bc', etc makes it easier to spot typing mismatches.
*/
/* XXX: the best typing needs to be validated by perf measurement:
* e.g. using a small type which is the cast to a larger duk_idx_t
* may be slower than declaring the variable as a duk_idx_t in the
* first place.
*/
/* XXX: use macros for the repetitive tval/refcount handling. */
switch ((int) DUK_DEC_OP(ins)) {
/* XXX: switch cast? */
case DUK_OP_LDREG: {
duk_small_uint_fast_t a;
duk_uint_fast_t bc;
duk_tval *tv1, *tv2;
a = DUK_DEC_A(ins); tv1 = DUK__REGP(a);
bc = DUK_DEC_BC(ins); tv2 = DUK__REGP(bc);
DUK_TVAL_SET_TVAL_UPDREF_FAST(thr, tv1, tv2); /* side effects */
break;
}
case DUK_OP_STREG: {
duk_small_uint_fast_t a;
duk_uint_fast_t bc;
duk_tval *tv1, *tv2;
a = DUK_DEC_A(ins); tv1 = DUK__REGP(a);
bc = DUK_DEC_BC(ins); tv2 = DUK__REGP(bc);
DUK_TVAL_SET_TVAL_UPDREF_FAST(thr, tv2, tv1); /* side effects */
break;
}
case DUK_OP_LDCONST: {
duk_small_uint_fast_t a;
duk_uint_fast_t bc;
duk_tval *tv1, *tv2;
a = DUK_DEC_A(ins); tv1 = DUK__REGP(a);
bc = DUK_DEC_BC(ins); tv2 = DUK__CONSTP(bc);
DUK_TVAL_SET_TVAL_UPDREF_FAST(thr, tv1, tv2); /* side effects */
break;
}
case DUK_OP_LDINT: {
duk_small_uint_fast_t a;
duk_int_fast_t bc;
duk_tval *tv1;
#if defined(DUK_USE_FASTINT)
duk_int32_t val;
#else
duk_double_t val;
#endif
#if defined(DUK_USE_FASTINT)
a = DUK_DEC_A(ins); tv1 = DUK__REGP(a);
bc = DUK_DEC_BC(ins); val = (duk_int32_t) (bc - DUK_BC_LDINT_BIAS);
DUK_TVAL_SET_FASTINT_I32_UPDREF(thr, tv1, val); /* side effects */
#else
a = DUK_DEC_A(ins); tv1 = DUK__REGP(a);
bc = DUK_DEC_BC(ins); val = (duk_double_t) (bc - DUK_BC_LDINT_BIAS);
DUK_TVAL_SET_NUMBER_UPDREF(thr, tv1, val); /* side effects */
#endif
break;
}
case DUK_OP_LDINTX: {
duk_small_uint_fast_t a;
duk_tval *tv1;
duk_double_t val;
/* LDINTX is not necessarily in FASTINT range, so
* no fast path for now.
*
* XXX: perhaps restrict LDINTX to fastint range, wider
* range very rarely needed.
*/
a = DUK_DEC_A(ins); tv1 = DUK__REGP(a);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv1));
val = DUK_TVAL_GET_NUMBER(tv1) * ((duk_double_t) (1L << DUK_BC_LDINTX_SHIFT)) +
(duk_double_t) DUK_DEC_BC(ins);
#if defined(DUK_USE_FASTINT)
DUK_TVAL_SET_NUMBER_CHKFAST(tv1, val);
#else
DUK_TVAL_SET_NUMBER(tv1, val);
#endif
break;
}
case DUK_OP_MPUTOBJ:
case DUK_OP_MPUTOBJI: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t a;
duk_tval *tv1;
duk_hobject *obj;
duk_uint_fast_t idx;
duk_small_uint_fast_t count;
/* A -> register of target object
* B -> first register of key/value pair list
* C -> number of key/value pairs
*/
a = DUK_DEC_A(ins); tv1 = DUK__REGP(a);
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv1));
obj = DUK_TVAL_GET_OBJECT(tv1);
idx = (duk_uint_fast_t) DUK_DEC_B(ins);
if (DUK_DEC_OP(ins) == DUK_OP_MPUTOBJI) {
duk_tval *tv_ind = DUK__REGP(idx);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_ind));
idx = (duk_uint_fast_t) DUK_TVAL_GET_NUMBER(tv_ind);
}
count = (duk_small_uint_fast_t) DUK_DEC_C(ins);
#if defined(DUK_USE_EXEC_INDIRECT_BOUND_CHECK)
if (DUK_UNLIKELY(idx + count * 2 > (duk_uint_fast_t) duk_get_top(ctx))) {
/* XXX: use duk_is_valid_index() instead? */
/* XXX: improve check; check against nregs, not against top */
DUK__INTERNAL_ERROR("MPUTOBJ out of bounds");
}
#endif
duk_push_hobject(ctx, obj);
while (count > 0) {
/* XXX: faster initialization (direct access or better primitives) */
duk_push_tval(ctx, DUK__REGP(idx));
DUK_ASSERT(duk_is_string(ctx, -1));
duk_push_tval(ctx, DUK__REGP(idx + 1)); /* -> [... obj key value] */
duk_xdef_prop_wec(ctx, -3); /* -> [... obj] */
count--;
idx += 2;
}
duk_pop(ctx); /* [... obj] -> [...] */
break;
}
case DUK_OP_MPUTARR:
case DUK_OP_MPUTARRI: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t a;
duk_tval *tv1;
duk_hobject *obj;
duk_uint_fast_t idx;
duk_small_uint_fast_t count;
duk_uint32_t arr_idx;
/* A -> register of target object
* B -> first register of value data (start_index, value1, value2, ..., valueN)
* C -> number of key/value pairs (N)
*/
a = DUK_DEC_A(ins); tv1 = DUK__REGP(a);
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv1));
obj = DUK_TVAL_GET_OBJECT(tv1);
DUK_ASSERT(obj != NULL);
idx = (duk_uint_fast_t) DUK_DEC_B(ins);
if (DUK_DEC_OP(ins) == DUK_OP_MPUTARRI) {
duk_tval *tv_ind = DUK__REGP(idx);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_ind));
idx = (duk_uint_fast_t) DUK_TVAL_GET_NUMBER(tv_ind);
}
count = (duk_small_uint_fast_t) DUK_DEC_C(ins);
#if defined(DUK_USE_EXEC_INDIRECT_BOUND_CHECK)
if (idx + count + 1 > (duk_uint_fast_t) duk_get_top(ctx)) {
/* XXX: use duk_is_valid_index() instead? */
/* XXX: improve check; check against nregs, not against top */
DUK__INTERNAL_ERROR("MPUTARR out of bounds");
}
#endif
tv1 = DUK__REGP(idx);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv1));
arr_idx = (duk_uint32_t) DUK_TVAL_GET_NUMBER(tv1);
idx++;
duk_push_hobject(ctx, obj);
while (count > 0) {
/* duk_xdef_prop() will define an own property without any array
* special behaviors. We'll need to set the array length explicitly
* in the end. For arrays with elisions, the compiler will emit an
* explicit SETALEN which will update the length.
*/
/* XXX: because we're dealing with 'own' properties of a fresh array,
* the array initializer should just ensure that the array has a large
* enough array part and write the values directly into array part,
* and finally set 'length' manually in the end (as already happens now).
*/
duk_push_tval(ctx, DUK__REGP(idx)); /* -> [... obj value] */
duk_xdef_prop_index_wec(ctx, -2, arr_idx); /* -> [... obj] */
/* XXX: could use at least one fewer loop counters */
count--;
idx++;
arr_idx++;
}
/* XXX: E5.1 Section 11.1.4 coerces the final length through
* ToUint32() which is odd but happens now as a side effect of
* 'arr_idx' type.
*/
duk_hobject_set_length(thr, obj, (duk_uint32_t) arr_idx);
duk_pop(ctx); /* [... obj] -> [...] */
break;
}
case DUK_OP_NEW:
case DUK_OP_NEWI: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_uint_fast_t idx;
duk_small_uint_fast_t i;
/* A -> unused (reserved for flags, for consistency with DUK_OP_CALL)
* B -> target register and start reg: constructor, arg1, ..., argN
* (for DUK_OP_NEWI, 'b' is indirect)
* C -> num args (N)
*/
/* duk_new() will call the constuctor using duk_handle_call().
* A constructor call prevents a yield from inside the constructor,
* even if the constructor is an Ecmascript function.
*/
/* Don't need to sync curr_pc here; duk_new() will do that
* when it augments the created error.
*/
/* XXX: unnecessary copying of values? Just set 'top' to
* b + c, and let the return handling fix up the stack frame?
*/
idx = (duk_uint_fast_t) DUK_DEC_B(ins);
if (DUK_DEC_OP(ins) == DUK_OP_NEWI) {
duk_tval *tv_ind = DUK__REGP(idx);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_ind));
idx = (duk_uint_fast_t) DUK_TVAL_GET_NUMBER(tv_ind);
}
#if defined(DUK_USE_EXEC_INDIRECT_BOUND_CHECK)
if (idx + c + 1 > (duk_uint_fast_t) duk_get_top(ctx)) {
/* XXX: use duk_is_valid_index() instead? */
/* XXX: improve check; check against nregs, not against top */
DUK__INTERNAL_ERROR("NEW out of bounds");
}
#endif
duk_require_stack(ctx, (duk_idx_t) c);
duk_push_tval(ctx, DUK__REGP(idx));
for (i = 0; i < c; i++) {
duk_push_tval(ctx, DUK__REGP(idx + i + 1));
}
duk_new(ctx, (duk_idx_t) c); /* [... constructor arg1 ... argN] -> [retval] */
DUK_DDD(DUK_DDDPRINT("NEW -> %!iT", (duk_tval *) duk_get_tval(ctx, -1)));
duk_replace(ctx, (duk_idx_t) idx);
/* When debugger is enabled, we need to recheck the activation
* status after returning. This is now handled by call handling
* and heap->dbg_force_restart.
*/
break;
}
case DUK_OP_REGEXP: {
#ifdef DUK_USE_REGEXP_SUPPORT
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
/* A -> target register
* B -> bytecode (also contains flags)
* C -> escaped source
*/
duk_push_tval(ctx, DUK__REGCONSTP(c));
duk_push_tval(ctx, DUK__REGCONSTP(b)); /* -> [ ... escaped_source bytecode ] */
duk_regexp_create_instance(thr); /* -> [ ... regexp_instance ] */
DUK_DDD(DUK_DDDPRINT("regexp instance: %!iT", (duk_tval *) duk_get_tval(ctx, -1)));
duk_replace(ctx, (duk_idx_t) a);
#else
/* The compiler should never emit DUK_OP_REGEXP if there is no
* regexp support.
*/
DUK__INTERNAL_ERROR("no regexp support");
#endif
break;
}
case DUK_OP_CSREG:
case DUK_OP_CSREGI: {
/*
* Assuming a register binds to a variable declared within this
* function (a declarative binding), the 'this' for the call
* setup is always 'undefined'. E5 Section 10.2.1.1.6.
*/
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t b = DUK_DEC_B(ins); /* restricted to regs */
duk_uint_fast_t idx;
/* A -> target register (A, A+1) for call setup
* (for DUK_OP_CSREGI, 'a' is indirect)
* B -> register containing target function (not type checked here)
*/
/* XXX: direct manipulation, or duk_replace_tval() */
/* Note: target registers a and a+1 may overlap with DUK__REGP(b).
* Careful here.
*/
idx = (duk_uint_fast_t) DUK_DEC_A(ins);
if (DUK_DEC_OP(ins) == DUK_OP_CSREGI) {
duk_tval *tv_ind = DUK__REGP(idx);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_ind));
idx = (duk_uint_fast_t) DUK_TVAL_GET_NUMBER(tv_ind);
}
#if defined(DUK_USE_EXEC_INDIRECT_BOUND_CHECK)
if (idx + 2 > (duk_uint_fast_t) duk_get_top(ctx)) {
/* XXX: use duk_is_valid_index() instead? */
/* XXX: improve check; check against nregs, not against top */
DUK__INTERNAL_ERROR("CSREG out of bounds");
}
#endif
duk_push_tval(ctx, DUK__REGP(b));
duk_replace(ctx, (duk_idx_t) idx);
duk_push_undefined(ctx);
duk_replace(ctx, (duk_idx_t) (idx + 1));
break;
}
case DUK_OP_GETVAR: {
duk_context *ctx = (duk_context *) thr;
duk_activation *act;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_uint_fast_t bc = DUK_DEC_BC(ins);
duk_tval *tv1;
duk_hstring *name;
tv1 = DUK__CONSTP(bc);
DUK_ASSERT(DUK_TVAL_IS_STRING(tv1));
name = DUK_TVAL_GET_STRING(tv1);
DUK_ASSERT(name != NULL);
DUK_DDD(DUK_DDDPRINT("GETVAR: '%!O'", (duk_heaphdr *) name));
act = thr->callstack + thr->callstack_top - 1;
(void) duk_js_getvar_activation(thr, act, name, 1 /*throw*/); /* -> [... val this] */
duk_pop(ctx); /* 'this' binding is not needed here */
duk_replace(ctx, (duk_idx_t) a);
break;
}
case DUK_OP_PUTVAR: {
duk_activation *act;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_uint_fast_t bc = DUK_DEC_BC(ins);
duk_tval *tv1;
duk_hstring *name;
tv1 = DUK__CONSTP(bc);
DUK_ASSERT(DUK_TVAL_IS_STRING(tv1));
name = DUK_TVAL_GET_STRING(tv1);
DUK_ASSERT(name != NULL);
/* XXX: putvar takes a duk_tval pointer, which is awkward and
* should be reworked.
*/
tv1 = DUK__REGP(a); /* val */
act = thr->callstack + thr->callstack_top - 1;
duk_js_putvar_activation(thr, act, name, tv1, DUK__STRICT());
break;
}
case DUK_OP_DECLVAR: {
duk_activation *act;
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_tval *tv1;
duk_hstring *name;
duk_small_uint_t prop_flags;
duk_bool_t is_func_decl;
duk_bool_t is_undef_value;
tv1 = DUK__REGCONSTP(b);
DUK_ASSERT(DUK_TVAL_IS_STRING(tv1));
name = DUK_TVAL_GET_STRING(tv1);
DUK_ASSERT(name != NULL);
is_undef_value = ((a & DUK_BC_DECLVAR_FLAG_UNDEF_VALUE) != 0);
is_func_decl = ((a & DUK_BC_DECLVAR_FLAG_FUNC_DECL) != 0);
/* XXX: declvar takes an duk_tval pointer, which is awkward and
* should be reworked.
*/
/* Compiler is responsible for selecting property flags (configurability,
* writability, etc).
*/
prop_flags = a & DUK_PROPDESC_FLAGS_MASK;
if (is_undef_value) {
duk_push_undefined(ctx);
} else {
duk_push_tval(ctx, DUK__REGCONSTP(c));
}
tv1 = DUK_GET_TVAL_NEGIDX(ctx, -1);
act = thr->callstack + thr->callstack_top - 1;
if (duk_js_declvar_activation(thr, act, name, tv1, prop_flags, is_func_decl)) {
/* already declared, must update binding value */
tv1 = DUK_GET_TVAL_NEGIDX(ctx, -1);
duk_js_putvar_activation(thr, act, name, tv1, DUK__STRICT());
}
duk_pop(ctx);
break;
}
case DUK_OP_DELVAR: {
duk_activation *act;
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_tval *tv1;
duk_hstring *name;
duk_bool_t rc;
tv1 = DUK__REGCONSTP(b);
DUK_ASSERT(DUK_TVAL_IS_STRING(tv1));
name = DUK_TVAL_GET_STRING(tv1);
DUK_ASSERT(name != NULL);
DUK_DDD(DUK_DDDPRINT("DELVAR '%!O'", (duk_heaphdr *) name));
act = thr->callstack + thr->callstack_top - 1;
rc = duk_js_delvar_activation(thr, act, name);
duk_push_boolean(ctx, rc);
duk_replace(ctx, (duk_idx_t) a);
break;
}
case DUK_OP_CSVAR:
case DUK_OP_CSVARI: {
/* 'this' value:
* E5 Section 6.b.i
*
* The only (standard) case where the 'this' binding is non-null is when
* (1) the variable is found in an object environment record, and
* (2) that object environment record is a 'with' block.
*
*/
duk_context *ctx = (duk_context *) thr;
duk_activation *act;
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_uint_fast_t idx;
duk_tval *tv1;
duk_hstring *name;
tv1 = DUK__REGCONSTP(b);
DUK_ASSERT(DUK_TVAL_IS_STRING(tv1));
name = DUK_TVAL_GET_STRING(tv1);
DUK_ASSERT(name != NULL);
act = thr->callstack + thr->callstack_top - 1;
(void) duk_js_getvar_activation(thr, act, name, 1 /*throw*/); /* -> [... val this] */
/* Note: target registers a and a+1 may overlap with DUK__REGCONSTP(b)
* and DUK__REGCONSTP(c). Careful here.
*/
idx = (duk_uint_fast_t) DUK_DEC_A(ins);
if (DUK_DEC_OP(ins) == DUK_OP_CSVARI) {
duk_tval *tv_ind = DUK__REGP(idx);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_ind));
idx = (duk_uint_fast_t) DUK_TVAL_GET_NUMBER(tv_ind);
}
#if defined(DUK_USE_EXEC_INDIRECT_BOUND_CHECK)
if (idx + 2 > (duk_uint_fast_t) duk_get_top(ctx)) {
/* XXX: use duk_is_valid_index() instead? */
/* XXX: improve check; check against nregs, not against top */
DUK__INTERNAL_ERROR("CSVAR out of bounds");
}
#endif
duk_replace(ctx, (duk_idx_t) (idx + 1)); /* 'this' binding */
duk_replace(ctx, (duk_idx_t) idx); /* variable value (function, we hope, not checked here) */
break;
}
case DUK_OP_CLOSURE: {
duk_context *ctx = (duk_context *) thr;
duk_activation *act;
duk_hcompiledfunction *fun;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_uint_fast_t bc = DUK_DEC_BC(ins);
duk_hobject *fun_temp;
/* A -> target reg
* BC -> inner function index
*/
DUK_DDD(DUK_DDDPRINT("CLOSURE to target register %ld, fnum %ld (count %ld)",
(long) a, (long) bc, (long) DUK_HCOMPILEDFUNCTION_GET_FUNCS_COUNT(thr->heap, DUK__FUN())));
DUK_ASSERT_DISABLE(bc >= 0); /* unsigned */
DUK_ASSERT((duk_uint_t) bc < (duk_uint_t) DUK_HCOMPILEDFUNCTION_GET_FUNCS_COUNT(thr->heap, DUK__FUN()));
act = thr->callstack + thr->callstack_top - 1;
fun = (duk_hcompiledfunction *) DUK_ACT_GET_FUNC(act);
fun_temp = DUK_HCOMPILEDFUNCTION_GET_FUNCS_BASE(thr->heap, fun)[bc];
DUK_ASSERT(fun_temp != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION(fun_temp));
DUK_DDD(DUK_DDDPRINT("CLOSURE: function template is: %p -> %!O",
(void *) fun_temp, (duk_heaphdr *) fun_temp));
if (act->lex_env == NULL) {
DUK_ASSERT(act->var_env == NULL);
duk_js_init_activation_environment_records_delayed(thr, act);
}
DUK_ASSERT(act->lex_env != NULL);
DUK_ASSERT(act->var_env != NULL);
/* functions always have a NEWENV flag, i.e. they get a
* new variable declaration environment, so only lex_env
* matters here.
*/
duk_js_push_closure(thr,
(duk_hcompiledfunction *) fun_temp,
act->var_env,
act->lex_env,
1 /*add_auto_proto*/);
duk_replace(ctx, (duk_idx_t) a);
break;
}
case DUK_OP_GETPROP: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_tval *tv_obj;
duk_tval *tv_key;
duk_bool_t rc;
/* A -> target reg
* B -> object reg/const (may be const e.g. in "'foo'[1]")
* C -> key reg/const
*/
tv_obj = DUK__REGCONSTP(b);
tv_key = DUK__REGCONSTP(c);
DUK_DDD(DUK_DDDPRINT("GETPROP: a=%ld obj=%!T, key=%!T",
(long) a,
(duk_tval *) DUK__REGCONSTP(b),
(duk_tval *) DUK__REGCONSTP(c)));
rc = duk_hobject_getprop(thr, tv_obj, tv_key); /* -> [val] */
DUK_UNREF(rc); /* ignore */
DUK_DDD(DUK_DDDPRINT("GETPROP --> %!T",
(duk_tval *) duk_get_tval(ctx, -1)));
tv_obj = NULL; /* invalidated */
tv_key = NULL; /* invalidated */
duk_replace(ctx, (duk_idx_t) a); /* val */
break;
}
case DUK_OP_PUTPROP: {
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_tval *tv_obj;
duk_tval *tv_key;
duk_tval *tv_val;
duk_bool_t rc;
/* A -> object reg
* B -> key reg/const
* C -> value reg/const
*
* Note: intentional difference to register arrangement
* of e.g. GETPROP; 'A' must contain a register-only value.
*/
tv_obj = DUK__REGP(a);
tv_key = DUK__REGCONSTP(b);
tv_val = DUK__REGCONSTP(c);
DUK_DDD(DUK_DDDPRINT("PUTPROP: obj=%!T, key=%!T, val=%!T",
(duk_tval *) DUK__REGP(a),
(duk_tval *) DUK__REGCONSTP(b),
(duk_tval *) DUK__REGCONSTP(c)));
rc = duk_hobject_putprop(thr, tv_obj, tv_key, tv_val, DUK__STRICT());
DUK_UNREF(rc); /* ignore */
DUK_DDD(DUK_DDDPRINT("PUTPROP --> obj=%!T, key=%!T, val=%!T",
(duk_tval *) DUK__REGP(a),
(duk_tval *) DUK__REGCONSTP(b),
(duk_tval *) DUK__REGCONSTP(c)));
tv_obj = NULL; /* invalidated */
tv_key = NULL; /* invalidated */
tv_val = NULL; /* invalidated */
break;
}
case DUK_OP_DELPROP: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_tval *tv_obj;
duk_tval *tv_key;
duk_bool_t rc;
/* A -> result reg
* B -> object reg
* C -> key reg/const
*/
tv_obj = DUK__REGP(b);
tv_key = DUK__REGCONSTP(c);
rc = duk_hobject_delprop(thr, tv_obj, tv_key, DUK__STRICT());
tv_obj = NULL; /* invalidated */
tv_key = NULL; /* invalidated */
duk_push_boolean(ctx, rc);
duk_replace(ctx, (duk_idx_t) a); /* result */
break;
}
case DUK_OP_CSPROP:
case DUK_OP_CSPROPI: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_uint_fast_t idx;
duk_tval *tv_obj;
duk_tval *tv_key;
duk_bool_t rc;
/* E5 Section 11.2.3, step 6.a.i */
/* E5 Section 10.4.3 */
/* XXX: allow object to be a const, e.g. in 'foo'.toString()?
* On the other hand, DUK_REGCONSTP() is slower and generates
* more code.
*/
tv_obj = DUK__REGP(b);
tv_key = DUK__REGCONSTP(c);
rc = duk_hobject_getprop(thr, tv_obj, tv_key); /* -> [val] */
DUK_UNREF(rc); /* unused */
tv_obj = NULL; /* invalidated */
tv_key = NULL; /* invalidated */
/* Note: target registers a and a+1 may overlap with DUK__REGP(b)
* and DUK__REGCONSTP(c). Careful here.
*/
idx = (duk_uint_fast_t) DUK_DEC_A(ins);
if (DUK_DEC_OP(ins) == DUK_OP_CSPROPI) {
duk_tval *tv_ind = DUK__REGP(idx);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_ind));
idx = (duk_uint_fast_t) DUK_TVAL_GET_NUMBER(tv_ind);
}
#if defined(DUK_USE_EXEC_INDIRECT_BOUND_CHECK)
if (idx + 2 > (duk_uint_fast_t) duk_get_top(ctx)) {
/* XXX: use duk_is_valid_index() instead? */
/* XXX: improve check; check against nregs, not against top */
DUK__INTERNAL_ERROR("CSPROP out of bounds");
}
#endif
duk_push_tval(ctx, DUK__REGP(b)); /* [ ... val obj ] */
duk_replace(ctx, (duk_idx_t) (idx + 1)); /* 'this' binding */
duk_replace(ctx, (duk_idx_t) idx); /* val */
break;
}
case DUK_OP_ADD:
case DUK_OP_SUB:
case DUK_OP_MUL:
case DUK_OP_DIV:
case DUK_OP_MOD: {
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_small_uint_fast_t op = DUK_DEC_OP(ins);
if (op == DUK_OP_ADD) {
/*
* Handling DUK_OP_ADD this way is more compact (experimentally)
* than a separate case with separate argument decoding.
*/
duk__vm_arith_add(thr, DUK__REGCONSTP(b), DUK__REGCONSTP(c), a);
} else {
duk__vm_arith_binary_op(thr, DUK__REGCONSTP(b), DUK__REGCONSTP(c), a, op);
}
break;
}
case DUK_OP_BAND:
case DUK_OP_BOR:
case DUK_OP_BXOR:
case DUK_OP_BASL:
case DUK_OP_BLSR:
case DUK_OP_BASR: {
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_small_uint_fast_t op = DUK_DEC_OP(ins);
duk__vm_bitwise_binary_op(thr, DUK__REGCONSTP(b), DUK__REGCONSTP(c), a, op);
break;
}
case DUK_OP_EQ:
case DUK_OP_NEQ: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_bool_t tmp;
/* E5 Sections 11.9.1, 11.9.3 */
tmp = duk_js_equals(thr, DUK__REGCONSTP(b), DUK__REGCONSTP(c));
if (DUK_DEC_OP(ins) == DUK_OP_NEQ) {
tmp = !tmp;
}
duk_push_boolean(ctx, tmp);
duk_replace(ctx, (duk_idx_t) a);
break;
}
case DUK_OP_SEQ:
case DUK_OP_SNEQ: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_bool_t tmp;
/* E5 Sections 11.9.1, 11.9.3 */
tmp = duk_js_strict_equals(DUK__REGCONSTP(b), DUK__REGCONSTP(c));
if (DUK_DEC_OP(ins) == DUK_OP_SNEQ) {
tmp = !tmp;
}
duk_push_boolean(ctx, tmp);
duk_replace(ctx, (duk_idx_t) a);
break;
}
/* Note: combining comparison ops must be done carefully because
* of uncomparable values (NaN): it's not necessarily true that
* (x >= y) === !(x < y). Also, evaluation order matters, and
* although it would only seem to affect the compiler this is
* actually not the case, because there are also run-time coercions
* of the arguments (with potential side effects).
*
* XXX: can be combined; check code size.
*/
case DUK_OP_GT: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_bool_t tmp;
/* x > y --> y < x */
tmp = duk_js_compare_helper(thr,
DUK__REGCONSTP(c), /* y */
DUK__REGCONSTP(b), /* x */
0); /* flags */
duk_push_boolean(ctx, tmp);
duk_replace(ctx, (duk_idx_t) a);
break;
}
case DUK_OP_GE: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_bool_t tmp;
/* x >= y --> not (x < y) */
tmp = duk_js_compare_helper(thr,
DUK__REGCONSTP(b), /* x */
DUK__REGCONSTP(c), /* y */
DUK_COMPARE_FLAG_EVAL_LEFT_FIRST |
DUK_COMPARE_FLAG_NEGATE); /* flags */
duk_push_boolean(ctx, tmp);
duk_replace(ctx, (duk_idx_t) a);
break;
}
case DUK_OP_LT: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_bool_t tmp;
/* x < y */
tmp = duk_js_compare_helper(thr,
DUK__REGCONSTP(b), /* x */
DUK__REGCONSTP(c), /* y */
DUK_COMPARE_FLAG_EVAL_LEFT_FIRST); /* flags */
duk_push_boolean(ctx, tmp);
duk_replace(ctx, (duk_idx_t) a);
break;
}
case DUK_OP_LE: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_bool_t tmp;
/* x <= y --> not (x > y) --> not (y < x) */
tmp = duk_js_compare_helper(thr,
DUK__REGCONSTP(c), /* y */
DUK__REGCONSTP(b), /* x */
DUK_COMPARE_FLAG_NEGATE); /* flags */
duk_push_boolean(ctx, tmp);
duk_replace(ctx, (duk_idx_t) a);
break;
}
case DUK_OP_IF: {
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_bool_t tmp;
tmp = duk_js_toboolean(DUK__REGCONSTP(b));
if (tmp == (duk_bool_t) a) {
/* if boolean matches A, skip next inst */
curr_pc++;
} else {
;
}
break;
}
case DUK_OP_JUMP: {
duk_int_fast_t abc = DUK_DEC_ABC(ins);
curr_pc += abc - DUK_BC_JUMP_BIAS;
break;
}
case DUK_OP_RETURN: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_small_uint_fast_t b = DUK_DEC_B(ins);
/* duk_small_uint_fast_t c = DUK_DEC_C(ins); */
duk_small_uint_t ret_result;
/* A -> flags
* B -> return value reg/const
* C -> currently unused
*/
DUK__SYNC_AND_NULL_CURR_PC();
/* duk__handle_return() is guaranteed never to throw, except
* for potential out-of-memory situations which will then
* propagate out of the executor longjmp handler.
*/
if (a & DUK_BC_RETURN_FLAG_HAVE_RETVAL) {
duk_push_tval(ctx, DUK__REGCONSTP(b));
} else {
duk_push_undefined(ctx);
}
ret_result = duk__handle_return(thr,
entry_thread,
entry_callstack_top);
if (ret_result == DUK__RETHAND_RESTART) {
goto restart_execution;
}
DUK_ASSERT(ret_result == DUK__RETHAND_FINISHED);
DUK_DDD(DUK_DDDPRINT("exiting executor after RETURN handling"));
return;
}
case DUK_OP_CALL:
case DUK_OP_CALLI: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_uint_fast_t idx;
duk_small_uint_t call_flags;
duk_small_uint_t flag_tailcall;
duk_small_uint_t flag_evalcall;
duk_tval *tv_func;
duk_hobject *obj_func;
duk_bool_t setup_rc;
duk_idx_t num_stack_args;
#if !defined(DUK_USE_EXEC_FUN_LOCAL)
duk_hcompiledfunction *fun;
#endif
/* A -> flags
* B -> base register for call (base -> func, base+1 -> this, base+2 -> arg1 ... base+2+N-1 -> argN)
* (for DUK_OP_CALLI, 'b' is indirect)
* C -> nargs
*/
/* these are not necessarily 0 or 1 (may be other non-zero), that's ok */
flag_tailcall = (a & DUK_BC_CALL_FLAG_TAILCALL);
flag_evalcall = (a & DUK_BC_CALL_FLAG_EVALCALL);
idx = (duk_uint_fast_t) DUK_DEC_B(ins);
if (DUK_DEC_OP(ins) == DUK_OP_CALLI) {
duk_tval *tv_ind = DUK__REGP(idx);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_ind));
idx = (duk_uint_fast_t) DUK_TVAL_GET_NUMBER(tv_ind);
}
#if defined(DUK_USE_EXEC_INDIRECT_BOUND_CHECK)
if (!duk_is_valid_index(ctx, (duk_idx_t) idx)) {
/* XXX: improve check; check against nregs, not against top */
DUK__INTERNAL_ERROR("CALL out of bounds");
}
#endif
/*
* To determine whether to use an optimized Ecmascript-to-Ecmascript
* call, we need to know whether the final, non-bound function is an
* Ecmascript function.
*
* This is now implemented so that we start to do an ecma-to-ecma call
* setup which will resolve the bound chain as the first thing. If the
* final function is not eligible, the return value indicates that the
* ecma-to-ecma call is not possible. The setup will overwrite the call
* target at DUK__REGP(idx) with the final, non-bound function (which
* may be a lightfunc), and fudge arguments if necessary.
*
* XXX: If an ecma-to-ecma call is not possible, this initial call
* setup will do bound function chain resolution but won't do the
* "effective this binding" resolution which is quite confusing.
* Perhaps add a helper for doing bound function and effective this
* binding resolution - and call that explicitly? Ecma-to-ecma call
* setup and normal function handling can then assume this prestep has
* been done by the caller.
*/
duk_set_top(ctx, (duk_idx_t) (idx + c + 2)); /* [ ... func this arg1 ... argN ] */
call_flags = 0;
if (flag_tailcall) {
/* We request a tail call, but in some corner cases
* call handling can decide that a tail call is
* actually not possible.
* See: test-bug-tailcall-preventyield-assert.c.
*/
call_flags |= DUK_CALL_FLAG_IS_TAILCALL;
}
/* Compared to duk_handle_call():
* - protected call: never
* - ignore recursion limit: never
*/
num_stack_args = c;
setup_rc = duk_handle_ecma_call_setup(thr,
num_stack_args,
call_flags);
if (setup_rc) {
/* Ecma-to-ecma call possible, may or may not be a tail call.
* Avoid C recursion by being clever.
*/
DUK_DDD(DUK_DDDPRINT("ecma-to-ecma call setup possible, restart execution"));
/* curr_pc synced by duk_handle_ecma_call_setup() */
goto restart_execution;
}
DUK_ASSERT(thr->ptr_curr_pc != NULL); /* restored if ecma-to-ecma setup fails */
DUK_DDD(DUK_DDDPRINT("ecma-to-ecma call not possible, target is native (may be lightfunc)"));
/* Recompute argument count: bound function handling may have shifted. */
num_stack_args = duk_get_top(ctx) - (idx + 2);
DUK_DDD(DUK_DDDPRINT("recomputed arg count: %ld\n", (long) num_stack_args));
tv_func = DUK__REGP(idx); /* Relookup if relocated */
if (DUK_TVAL_IS_LIGHTFUNC(tv_func)) {
call_flags = 0; /* not protected, respect reclimit, not constructor */
/* There is no eval() special handling here: eval() is never
* automatically converted to a lightfunc.
*/
DUK_ASSERT(DUK_TVAL_GET_LIGHTFUNC_FUNCPTR(tv_func) != duk_bi_global_object_eval);
duk_handle_call_unprotected(thr,
num_stack_args,
call_flags);
/* duk_js_call.c is required to restore the stack reserve
* so we only need to reset the top.
*/
#if !defined(DUK_USE_EXEC_FUN_LOCAL)
fun = DUK__FUN();
#endif
duk_set_top(ctx, (duk_idx_t) fun->nregs);
/* No need to reinit setjmp() catchpoint, as call handling
* will store and restore our state.
*/
} else {
/* Call setup checks callability. */
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv_func));
obj_func = DUK_TVAL_GET_OBJECT(tv_func);
DUK_ASSERT(obj_func != NULL);
DUK_ASSERT(!DUK_HOBJECT_HAS_BOUND(obj_func));
/*
* Other cases, use C recursion.
*
* If a tail call was requested we ignore it and execute a normal call.
* Since Duktape 0.11.0 the compiler emits a RETURN opcode even after
* a tail call to avoid test-bug-tailcall-thread-yield-resume.js.
*
* Direct eval call: (1) call target (before following bound function
* chain) is the built-in eval() function, and (2) call was made with
* the identifier 'eval'.
*/
call_flags = 0; /* not protected, respect reclimit, not constructor */
if (DUK_HOBJECT_IS_NATIVEFUNCTION(obj_func) &&
((duk_hnativefunction *) obj_func)->func == duk_bi_global_object_eval) {
if (flag_evalcall) {
DUK_DDD(DUK_DDDPRINT("call target is eval, call identifier was 'eval' -> direct eval"));
call_flags |= DUK_CALL_FLAG_DIRECT_EVAL;
} else {
DUK_DDD(DUK_DDDPRINT("call target is eval, call identifier was not 'eval' -> indirect eval"));
}
}
duk_handle_call_unprotected(thr,
num_stack_args,
call_flags);
/* duk_js_call.c is required to restore the stack reserve
* so we only need to reset the top.
*/
#if !defined(DUK_USE_EXEC_FUN_LOCAL)
fun = DUK__FUN();
#endif
duk_set_top(ctx, (duk_idx_t) fun->nregs);
/* No need to reinit setjmp() catchpoint, as call handling
* will store and restore our state.
*/
}
/* When debugger is enabled, we need to recheck the activation
* status after returning. This is now handled by call handling
* and heap->dbg_force_restart.
*/
break;
}
case DUK_OP_TRYCATCH: {
duk_context *ctx = (duk_context *) thr;
duk_activation *act;
duk_catcher *cat;
duk_tval *tv1;
duk_small_uint_fast_t a;
duk_uint_fast_t bc;
/* A -> flags
* BC -> reg_catch; base register for two registers used both during
* trycatch setup and when catch is triggered
*
* If DUK_BC_TRYCATCH_FLAG_CATCH_BINDING set:
* reg_catch + 0: catch binding variable name (string).
* Automatic declarative environment is established for
* the duration of the 'catch' clause.
*
* If DUK_BC_TRYCATCH_FLAG_WITH_BINDING set:
* reg_catch + 0: with 'target value', which is coerced to
* an object and then used as a bindind object for an
* environment record. The binding is initialized here, for
* the 'try' clause.
*
* Note that a TRYCATCH generated for a 'with' statement has no
* catch or finally parts.
*/
/* XXX: TRYCATCH handling should be reworked to avoid creating
* an explicit scope unless it is actually needed (e.g. function
* instances or eval is executed inside the catch block). This
* rework is not trivial because the compiler doesn't have an
* intermediate representation. When the rework is done, the
* opcode format can also be made more straightforward.
*/
/* XXX: side effect handling is quite awkward here */
DUK_DDD(DUK_DDDPRINT("TRYCATCH: reg_catch=%ld, have_catch=%ld, "
"have_finally=%ld, catch_binding=%ld, with_binding=%ld (flags=0x%02lx)",
(long) DUK_DEC_BC(ins),
(long) (DUK_DEC_A(ins) & DUK_BC_TRYCATCH_FLAG_HAVE_CATCH ? 1 : 0),
(long) (DUK_DEC_A(ins) & DUK_BC_TRYCATCH_FLAG_HAVE_FINALLY ? 1 : 0),
(long) (DUK_DEC_A(ins) & DUK_BC_TRYCATCH_FLAG_CATCH_BINDING ? 1 : 0),
(long) (DUK_DEC_A(ins) & DUK_BC_TRYCATCH_FLAG_WITH_BINDING ? 1 : 0),
(unsigned long) DUK_DEC_A(ins)));
a = DUK_DEC_A(ins);
bc = DUK_DEC_BC(ins);
act = thr->callstack + thr->callstack_top - 1;
DUK_ASSERT(thr->callstack_top >= 1);
/* 'with' target must be created first, in case we run out of memory */
/* XXX: refactor out? */
if (a & DUK_BC_TRYCATCH_FLAG_WITH_BINDING) {
DUK_DDD(DUK_DDDPRINT("need to initialize a with binding object"));
if (act->lex_env == NULL) {
DUK_ASSERT(act->var_env == NULL);
DUK_DDD(DUK_DDDPRINT("delayed environment initialization"));
/* must relookup act in case of side effects */
duk_js_init_activation_environment_records_delayed(thr, act);
act = thr->callstack + thr->callstack_top - 1;
DUK_UNREF(act); /* 'act' is no longer accessed, scanbuild fix */
}
DUK_ASSERT(act->lex_env != NULL);
DUK_ASSERT(act->var_env != NULL);
(void) duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJENV),
-1); /* no prototype, updated below */
duk_push_tval(ctx, DUK__REGP(bc));
duk_to_object(ctx, -1);
duk_dup(ctx, -1);
/* [ ... env target ] */
/* [ ... env target target ] */
duk_xdef_prop_stridx(thr, -3, DUK_STRIDX_INT_TARGET, DUK_PROPDESC_FLAGS_NONE);
duk_xdef_prop_stridx(thr, -2, DUK_STRIDX_INT_THIS, DUK_PROPDESC_FLAGS_NONE); /* always provideThis=true */
/* [ ... env ] */
DUK_DDD(DUK_DDDPRINT("environment for with binding: %!iT",
(duk_tval *) duk_get_tval(ctx, -1)));
}
/* allocate catcher and populate it (should be atomic) */
duk_hthread_catchstack_grow(thr);
cat = thr->catchstack + thr->catchstack_top;
DUK_ASSERT(thr->catchstack_top + 1 <= thr->catchstack_size);
thr->catchstack_top++;
cat->flags = DUK_CAT_TYPE_TCF;
cat->h_varname = NULL;
if (a & DUK_BC_TRYCATCH_FLAG_HAVE_CATCH) {
cat->flags |= DUK_CAT_FLAG_CATCH_ENABLED;
}
if (a & DUK_BC_TRYCATCH_FLAG_HAVE_FINALLY) {
cat->flags |= DUK_CAT_FLAG_FINALLY_ENABLED;
}
if (a & DUK_BC_TRYCATCH_FLAG_CATCH_BINDING) {
DUK_DDD(DUK_DDDPRINT("catch binding flag set to catcher"));
cat->flags |= DUK_CAT_FLAG_CATCH_BINDING_ENABLED;
tv1 = DUK__REGP(bc);
DUK_ASSERT(DUK_TVAL_IS_STRING(tv1));
/* borrowed reference; although 'tv1' comes from a register,
* its value was loaded using LDCONST so the constant will
* also exist and be reachable.
*/
cat->h_varname = DUK_TVAL_GET_STRING(tv1);
} else if (a & DUK_BC_TRYCATCH_FLAG_WITH_BINDING) {
/* env created above to stack top */
duk_hobject *new_env;
DUK_DDD(DUK_DDDPRINT("lexenv active flag set to catcher"));
cat->flags |= DUK_CAT_FLAG_LEXENV_ACTIVE;
DUK_DDD(DUK_DDDPRINT("activating object env: %!iT",
(duk_tval *) duk_get_tval(ctx, -1)));
DUK_ASSERT(act->lex_env != NULL);
new_env = DUK_GET_HOBJECT_NEGIDX(ctx, -1);
DUK_ASSERT(new_env != NULL);
act = thr->callstack + thr->callstack_top - 1; /* relookup (side effects) */
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, new_env, act->lex_env); /* side effects */
act = thr->callstack + thr->callstack_top - 1; /* relookup (side effects) */
act->lex_env = new_env;
DUK_HOBJECT_INCREF(thr, new_env);
duk_pop(ctx);
} else {
;
}
/* Registers 'bc' and 'bc + 1' are written in longjmp handling
* and if their previous values (which are temporaries) become
* unreachable -and- have a finalizer, there'll be a function
* call during error handling which is not supported now (GH-287).
* Ensure that both 'bc' and 'bc + 1' have primitive values to
* guarantee no finalizer calls in error handling. Scrubbing also
* ensures finalizers for the previous values run here rather than
* later. Error handling related values are also written to 'bc'
* and 'bc + 1' but those values never become unreachable during
* error handling, so there's no side effect problem even if the
* error value has a finalizer.
*/
duk_to_undefined(ctx, bc);
duk_to_undefined(ctx, bc + 1);
cat = thr->catchstack + thr->catchstack_top - 1; /* relookup (side effects) */
cat->callstack_index = thr->callstack_top - 1;
cat->pc_base = (duk_instr_t *) curr_pc; /* pre-incremented, points to first jump slot */
cat->idx_base = (duk_size_t) (thr->valstack_bottom - thr->valstack) + bc;
DUK_DDD(DUK_DDDPRINT("TRYCATCH catcher: flags=0x%08lx, callstack_index=%ld, pc_base=%ld, "
"idx_base=%ld, h_varname=%!O",
(unsigned long) cat->flags, (long) cat->callstack_index,
(long) cat->pc_base, (long) cat->idx_base, (duk_heaphdr *) cat->h_varname));
curr_pc += 2; /* skip jump slots */
break;
}
/* Pre/post inc/dec for register variables, important for loops. */
case DUK_OP_PREINCR:
case DUK_OP_PREDECR:
case DUK_OP_POSTINCR:
case DUK_OP_POSTDECR: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_uint_fast_t bc = DUK_DEC_BC(ins);
duk_tval *tv1, *tv2;
duk_double_t x, y, z;
/* Two lowest bits of opcode are used to distinguish
* variants. Bit 0 = inc(0)/dec(1), bit 1 = pre(0)/post(1).
*/
DUK_ASSERT((DUK_OP_PREINCR & 0x03) == 0x00);
DUK_ASSERT((DUK_OP_PREDECR & 0x03) == 0x01);
DUK_ASSERT((DUK_OP_POSTINCR & 0x03) == 0x02);
DUK_ASSERT((DUK_OP_POSTDECR & 0x03) == 0x03);
tv1 = DUK__REGP(bc);
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv1)) {
duk_int64_t x_fi, y_fi, z_fi;
x_fi = DUK_TVAL_GET_FASTINT(tv1);
if (ins & DUK_ENC_OP(0x01)) {
if (x_fi == DUK_FASTINT_MIN) {
goto skip_fastint;
}
y_fi = x_fi - 1;
} else {
if (x_fi == DUK_FASTINT_MAX) {
goto skip_fastint;
}
y_fi = x_fi + 1;
}
DUK_TVAL_SET_FASTINT(tv1, y_fi); /* no need for refcount update */
tv2 = DUK__REGP(a);
z_fi = (ins & DUK_ENC_OP(0x02)) ? x_fi : y_fi;
DUK_TVAL_SET_FASTINT_UPDREF(thr, tv2, z_fi); /* side effects */
break;
}
skip_fastint:
#endif
if (DUK_TVAL_IS_NUMBER(tv1)) {
/* Fast path for the case where the register
* is a number (e.g. loop counter).
*/
x = DUK_TVAL_GET_NUMBER(tv1);
if (ins & DUK_ENC_OP(0x01)) {
y = x - 1.0;
} else {
y = x + 1.0;
}
DUK_TVAL_SET_NUMBER(tv1, y); /* no need for refcount update */
} else {
x = duk_to_number(ctx, bc);
if (ins & DUK_ENC_OP(0x01)) {
y = x - 1.0;
} else {
y = x + 1.0;
}
duk_push_number(ctx, y);
duk_replace(ctx, bc);
}
tv2 = DUK__REGP(a);
z = (ins & DUK_ENC_OP(0x02)) ? x : y;
DUK_TVAL_SET_NUMBER_UPDREF(thr, tv2, z); /* side effects */
break;
}
/* Preinc/predec for var-by-name, slow path. */
case DUK_OP_PREINCV:
case DUK_OP_PREDECV:
case DUK_OP_POSTINCV:
case DUK_OP_POSTDECV: {
duk_context *ctx = (duk_context *) thr;
duk_activation *act;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_uint_fast_t bc = DUK_DEC_BC(ins);
duk_double_t x, y;
duk_tval *tv1;
duk_hstring *name;
/* Two lowest bits of opcode are used to distinguish
* variants. Bit 0 = inc(0)/dec(1), bit 1 = pre(0)/post(1).
*/
DUK_ASSERT((DUK_OP_PREINCV & 0x03) == 0x00);
DUK_ASSERT((DUK_OP_PREDECV & 0x03) == 0x01);
DUK_ASSERT((DUK_OP_POSTINCV & 0x03) == 0x02);
DUK_ASSERT((DUK_OP_POSTDECV & 0x03) == 0x03);
tv1 = DUK__CONSTP(bc);
DUK_ASSERT(DUK_TVAL_IS_STRING(tv1));
name = DUK_TVAL_GET_STRING(tv1);
DUK_ASSERT(name != NULL);
act = thr->callstack + thr->callstack_top - 1;
(void) duk_js_getvar_activation(thr, act, name, 1 /*throw*/); /* -> [... val this] */
/* XXX: fastint fast path would be very useful here */
x = duk_to_number(ctx, -2);
duk_pop_2(ctx);
if (ins & DUK_ENC_OP(0x01)) {
y = x - 1.0;
} else {
y = x + 1.0;
}
duk_push_number(ctx, y);
tv1 = DUK_GET_TVAL_NEGIDX(ctx, -1);
DUK_ASSERT(tv1 != NULL);
duk_js_putvar_activation(thr, act, name, tv1, DUK__STRICT());
duk_pop(ctx);
duk_push_number(ctx, (ins & DUK_ENC_OP(0x02)) ? x : y);
duk_replace(ctx, (duk_idx_t) a);
break;
}
/* Preinc/predec for object properties. */
case DUK_OP_PREINCP:
case DUK_OP_PREDECP:
case DUK_OP_POSTINCP:
case DUK_OP_POSTDECP: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t a = DUK_DEC_A(ins);
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_tval *tv_obj;
duk_tval *tv_key;
duk_tval *tv_val;
duk_bool_t rc;
duk_double_t x, y;
/* A -> target reg
* B -> object reg/const (may be const e.g. in "'foo'[1]")
* C -> key reg/const
*/
/* Two lowest bits of opcode are used to distinguish
* variants. Bit 0 = inc(0)/dec(1), bit 1 = pre(0)/post(1).
*/
DUK_ASSERT((DUK_OP_PREINCP & 0x03) == 0x00);
DUK_ASSERT((DUK_OP_PREDECP & 0x03) == 0x01);
DUK_ASSERT((DUK_OP_POSTINCP & 0x03) == 0x02);
DUK_ASSERT((DUK_OP_POSTDECP & 0x03) == 0x03);
tv_obj = DUK__REGCONSTP(b);
tv_key = DUK__REGCONSTP(c);
rc = duk_hobject_getprop(thr, tv_obj, tv_key); /* -> [val] */
DUK_UNREF(rc); /* ignore */
tv_obj = NULL; /* invalidated */
tv_key = NULL; /* invalidated */
x = duk_to_number(ctx, -1);
duk_pop(ctx);
if (ins & DUK_ENC_OP(0x01)) {
y = x - 1.0;
} else {
y = x + 1.0;
}
duk_push_number(ctx, y);
tv_val = DUK_GET_TVAL_NEGIDX(ctx, -1);
DUK_ASSERT(tv_val != NULL);
tv_obj = DUK__REGCONSTP(b);
tv_key = DUK__REGCONSTP(c);
rc = duk_hobject_putprop(thr, tv_obj, tv_key, tv_val, DUK__STRICT());
DUK_UNREF(rc); /* ignore */
tv_obj = NULL; /* invalidated */
tv_key = NULL; /* invalidated */
duk_pop(ctx);
duk_push_number(ctx, (ins & DUK_ENC_OP(0x02)) ? x : y);
duk_replace(ctx, (duk_idx_t) a);
break;
}
case DUK_OP_EXTRA: {
/* XXX: shared decoding of 'b' and 'c'? */
duk_small_uint_fast_t extraop = DUK_DEC_A(ins);
switch ((int) extraop) {
/* XXX: switch cast? */
case DUK_EXTRAOP_NOP: {
/* nop */
break;
}
case DUK_EXTRAOP_INVALID: {
DUK_ERROR_FMT1(thr, DUK_ERR_INTERNAL_ERROR, "INVALID opcode (%ld)", (long) DUK_DEC_BC(ins));
break;
}
case DUK_EXTRAOP_LDTHIS: {
/* Note: 'this' may be bound to any value, not just an object */
duk_uint_fast_t bc = DUK_DEC_BC(ins);
duk_tval *tv1, *tv2;
tv1 = DUK__REGP(bc);
tv2 = thr->valstack_bottom - 1; /* 'this binding' is just under bottom */
DUK_ASSERT(tv2 >= thr->valstack);
DUK_DDD(DUK_DDDPRINT("LDTHIS: %!T to r%ld", (duk_tval *) tv2, (long) bc));
DUK_TVAL_SET_TVAL_UPDREF_FAST(thr, tv1, tv2); /* side effects */
break;
}
case DUK_EXTRAOP_LDUNDEF: {
duk_uint_fast_t bc = DUK_DEC_BC(ins);
duk_tval *tv1;
tv1 = DUK__REGP(bc);
DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv1); /* side effects */
break;
}
case DUK_EXTRAOP_LDNULL: {
duk_uint_fast_t bc = DUK_DEC_BC(ins);
duk_tval *tv1;
tv1 = DUK__REGP(bc);
DUK_TVAL_SET_NULL_UPDREF(thr, tv1); /* side effects */
break;
}
case DUK_EXTRAOP_LDTRUE:
case DUK_EXTRAOP_LDFALSE: {
duk_uint_fast_t bc = DUK_DEC_BC(ins);
duk_tval *tv1;
duk_small_uint_fast_t bval = (extraop == DUK_EXTRAOP_LDTRUE ? 1 : 0);
tv1 = DUK__REGP(bc);
DUK_TVAL_SET_BOOLEAN_UPDREF(thr, tv1, bval); /* side effects */
break;
}
case DUK_EXTRAOP_NEWOBJ: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_push_object(ctx);
duk_replace(ctx, (duk_idx_t) b);
break;
}
case DUK_EXTRAOP_NEWARR: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_push_array(ctx);
duk_replace(ctx, (duk_idx_t) b);
break;
}
case DUK_EXTRAOP_SETALEN: {
duk_small_uint_fast_t b;
duk_small_uint_fast_t c;
duk_tval *tv1;
duk_hobject *h;
duk_uint32_t len;
b = DUK_DEC_B(ins); tv1 = DUK__REGP(b);
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv1));
h = DUK_TVAL_GET_OBJECT(tv1);
c = DUK_DEC_C(ins); tv1 = DUK__REGP(c);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv1));
len = (duk_uint32_t) DUK_TVAL_GET_NUMBER(tv1);
duk_hobject_set_length(thr, h, len);
break;
}
case DUK_EXTRAOP_TYPEOF: {
duk_context *ctx = (duk_context *) thr;
duk_uint_fast_t bc = DUK_DEC_BC(ins);
duk_push_hstring(ctx, duk_js_typeof(thr, DUK__REGP(bc)));
duk_replace(ctx, (duk_idx_t) bc);
break;
}
case DUK_EXTRAOP_TYPEOFID: {
duk_context *ctx = (duk_context *) thr;
duk_activation *act;
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_hstring *name;
duk_tval *tv;
/* B -> target register
* C -> constant index of identifier name
*/
tv = DUK__REGCONSTP(c); /* XXX: this could be a DUK__CONSTP instead */
DUK_ASSERT(DUK_TVAL_IS_STRING(tv));
name = DUK_TVAL_GET_STRING(tv);
act = thr->callstack + thr->callstack_top - 1;
if (duk_js_getvar_activation(thr, act, name, 0 /*throw*/)) {
/* -> [... val this] */
tv = DUK_GET_TVAL_NEGIDX(ctx, -2);
duk_push_hstring(ctx, duk_js_typeof(thr, tv));
duk_replace(ctx, (duk_idx_t) b);
duk_pop_2(ctx);
} else {
/* unresolvable, no stack changes */
duk_push_hstring_stridx(ctx, DUK_STRIDX_LC_UNDEFINED);
duk_replace(ctx, (duk_idx_t) b);
}
break;
}
case DUK_EXTRAOP_INITENUM: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
/*
* Enumeration semantics come from for-in statement, E5 Section 12.6.4.
* If called with 'null' or 'undefined', this opcode returns 'null' as
* the enumerator, which is special cased in NEXTENUM. This simplifies
* the compiler part
*/
/* B -> register for writing enumerator object
* C -> value to be enumerated (register)
*/
if (duk_is_null_or_undefined(ctx, (duk_idx_t) c)) {
duk_push_null(ctx);
duk_replace(ctx, (duk_idx_t) b);
} else {
duk_dup(ctx, (duk_idx_t) c);
duk_to_object(ctx, -1);
duk_hobject_enumerator_create(ctx, 0 /*enum_flags*/); /* [ ... val ] --> [ ... enum ] */
duk_replace(ctx, (duk_idx_t) b);
}
break;
}
case DUK_EXTRAOP_NEXTENUM: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
/*
* NEXTENUM checks whether the enumerator still has unenumerated
* keys. If so, the next key is loaded to the target register
* and the next instruction is skipped. Otherwise the next instruction
* will be executed, jumping out of the enumeration loop.
*/
/* B -> target register for next key
* C -> enum register
*/
DUK_DDD(DUK_DDDPRINT("NEXTENUM: b->%!T, c->%!T",
(duk_tval *) duk_get_tval(ctx, (duk_idx_t) b),
(duk_tval *) duk_get_tval(ctx, (duk_idx_t) c)));
if (duk_is_object(ctx, (duk_idx_t) c)) {
/* XXX: assert 'c' is an enumerator */
duk_dup(ctx, (duk_idx_t) c);
if (duk_hobject_enumerator_next(ctx, 0 /*get_value*/)) {
/* [ ... enum ] -> [ ... next_key ] */
DUK_DDD(DUK_DDDPRINT("enum active, next key is %!T, skip jump slot ",
(duk_tval *) duk_get_tval(ctx, -1)));
curr_pc++;
} else {
/* [ ... enum ] -> [ ... ] */
DUK_DDD(DUK_DDDPRINT("enum finished, execute jump slot"));
duk_push_undefined(ctx);
}
duk_replace(ctx, (duk_idx_t) b);
} else {
/* 'null' enumerator case -> behave as with an empty enumerator */
DUK_ASSERT(duk_is_null(ctx, (duk_idx_t) c));
DUK_DDD(DUK_DDDPRINT("enum is null, execute jump slot"));
}
break;
}
case DUK_EXTRAOP_INITSET:
case DUK_EXTRAOP_INITSETI:
case DUK_EXTRAOP_INITGET:
case DUK_EXTRAOP_INITGETI: {
duk_context *ctx = (duk_context *) thr;
duk_bool_t is_set = (extraop == DUK_EXTRAOP_INITSET || extraop == DUK_EXTRAOP_INITSETI);
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_uint_fast_t idx;
/* B -> object register
* C -> C+0 contains key, C+1 closure (value)
*/
/*
* INITSET/INITGET are only used to initialize object literal keys.
* The compiler ensures that there cannot be a previous data property
* of the same name. It also ensures that setter and getter can only
* be initialized once (or not at all).
*/
idx = (duk_uint_fast_t) DUK_DEC_C(ins);
if (extraop == DUK_EXTRAOP_INITSETI || extraop == DUK_EXTRAOP_INITGETI) {
duk_tval *tv_ind = DUK__REGP(idx);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_ind));
idx = (duk_uint_fast_t) DUK_TVAL_GET_NUMBER(tv_ind);
}
#if defined(DUK_USE_EXEC_INDIRECT_BOUND_CHECK)
if (idx + 2 > (duk_uint_fast_t) duk_get_top(ctx)) {
/* XXX: use duk_is_valid_index() instead? */
/* XXX: improve check; check against nregs, not against top */
DUK__INTERNAL_ERROR("INITSET/INITGET out of bounds");
}
#endif
/* XXX: this is now a very unoptimal implementation -- this can be
* made very simple by direct manipulation of the object internals,
* given the guarantees above.
*/
duk_push_hobject_bidx(ctx, DUK_BIDX_OBJECT_CONSTRUCTOR);
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_DEFINE_PROPERTY);
duk_push_undefined(ctx);
duk_dup(ctx, (duk_idx_t) b);
duk_dup(ctx, (duk_idx_t) (idx + 0));
duk_push_object(ctx); /* -> [ Object defineProperty undefined obj key desc ] */
duk_push_true(ctx);
duk_put_prop_stridx(ctx, -2, DUK_STRIDX_ENUMERABLE);
duk_push_true(ctx);
duk_put_prop_stridx(ctx, -2, DUK_STRIDX_CONFIGURABLE);
duk_dup(ctx, (duk_idx_t) (idx + 1));
duk_put_prop_stridx(ctx, -2, (is_set ? DUK_STRIDX_SET : DUK_STRIDX_GET));
DUK_DDD(DUK_DDDPRINT("INITGET/INITSET: obj=%!T, key=%!T, desc=%!T",
(duk_tval *) duk_get_tval(ctx, -3),
(duk_tval *) duk_get_tval(ctx, -2),
(duk_tval *) duk_get_tval(ctx, -1)));
duk_call_method(ctx, 3); /* -> [ Object res ] */
duk_pop_2(ctx);
DUK_DDD(DUK_DDDPRINT("INITGET/INITSET AFTER: obj=%!T",
(duk_tval *) duk_get_tval(ctx, (duk_idx_t) b)));
break;
}
case DUK_EXTRAOP_ENDTRY: {
duk_catcher *cat;
duk_tval *tv1;
DUK_ASSERT(thr->catchstack_top >= 1);
DUK_ASSERT(thr->callstack_top >= 1);
DUK_ASSERT(thr->catchstack[thr->catchstack_top - 1].callstack_index == thr->callstack_top - 1);
cat = thr->catchstack + thr->catchstack_top - 1;
DUK_DDD(DUK_DDDPRINT("ENDTRY: clearing catch active flag (regardless of whether it was set or not)"));
DUK_CAT_CLEAR_CATCH_ENABLED(cat);
if (DUK_CAT_HAS_FINALLY_ENABLED(cat)) {
DUK_DDD(DUK_DDDPRINT("ENDTRY: finally part is active, jump through 2nd jump slot with 'normal continuation'"));
tv1 = thr->valstack + cat->idx_base;
DUK_ASSERT(tv1 >= thr->valstack && tv1 < thr->valstack_top);
DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv1); /* side effects */
tv1 = NULL;
tv1 = thr->valstack + cat->idx_base + 1;
DUK_ASSERT(tv1 >= thr->valstack && tv1 < thr->valstack_top);
DUK_TVAL_SET_FASTINT_U32_UPDREF(thr, tv1, (duk_uint32_t) DUK_LJ_TYPE_NORMAL); /* side effects */
tv1 = NULL;
DUK_CAT_CLEAR_FINALLY_ENABLED(cat);
} else {
DUK_DDD(DUK_DDDPRINT("ENDTRY: no finally part, dismantle catcher, jump through 2nd jump slot (to end of statement)"));
duk_hthread_catchstack_unwind(thr, thr->catchstack_top - 1);
/* no need to unwind callstack */
}
curr_pc = cat->pc_base + 1;
break;
}
case DUK_EXTRAOP_ENDCATCH: {
duk_activation *act;
duk_catcher *cat;
duk_tval *tv1;
DUK_ASSERT(thr->catchstack_top >= 1);
DUK_ASSERT(thr->callstack_top >= 1);
DUK_ASSERT(thr->catchstack[thr->catchstack_top - 1].callstack_index == thr->callstack_top - 1);
cat = thr->catchstack + thr->catchstack_top - 1;
DUK_ASSERT(!DUK_CAT_HAS_CATCH_ENABLED(cat)); /* cleared before entering catch part */
act = thr->callstack + thr->callstack_top - 1;
if (DUK_CAT_HAS_LEXENV_ACTIVE(cat)) {
duk_hobject *prev_env;
/* 'with' binding has no catch clause, so can't be here unless a normal try-catch */
DUK_ASSERT(DUK_CAT_HAS_CATCH_BINDING_ENABLED(cat));
DUK_ASSERT(act->lex_env != NULL);
DUK_DDD(DUK_DDDPRINT("ENDCATCH: popping catcher part lexical environment"));
prev_env = act->lex_env;
DUK_ASSERT(prev_env != NULL);
act->lex_env = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, prev_env);
DUK_CAT_CLEAR_LEXENV_ACTIVE(cat);
DUK_HOBJECT_DECREF(thr, prev_env); /* side effects */
}
if (DUK_CAT_HAS_FINALLY_ENABLED(cat)) {
DUK_DDD(DUK_DDDPRINT("ENDCATCH: finally part is active, jump through 2nd jump slot with 'normal continuation'"));
tv1 = thr->valstack + cat->idx_base;
DUK_ASSERT(tv1 >= thr->valstack && tv1 < thr->valstack_top);
DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv1); /* side effects */
tv1 = NULL;
tv1 = thr->valstack + cat->idx_base + 1;
DUK_ASSERT(tv1 >= thr->valstack && tv1 < thr->valstack_top);
DUK_TVAL_SET_FASTINT_U32_UPDREF(thr, tv1, (duk_uint32_t) DUK_LJ_TYPE_NORMAL); /* side effects */
tv1 = NULL;
DUK_CAT_CLEAR_FINALLY_ENABLED(cat);
} else {
DUK_DDD(DUK_DDDPRINT("ENDCATCH: no finally part, dismantle catcher, jump through 2nd jump slot (to end of statement)"));
duk_hthread_catchstack_unwind(thr, thr->catchstack_top - 1);
/* no need to unwind callstack */
}
curr_pc = cat->pc_base + 1;
break;
}
case DUK_EXTRAOP_ENDFIN: {
duk_context *ctx = (duk_context *) thr;
duk_catcher *cat;
duk_tval *tv1;
duk_small_uint_t cont_type;
duk_small_uint_t ret_result;
/* Sync and NULL early. */
DUK__SYNC_AND_NULL_CURR_PC();
DUK_ASSERT(thr->catchstack_top >= 1);
DUK_ASSERT(thr->callstack_top >= 1);
DUK_ASSERT(thr->catchstack[thr->catchstack_top - 1].callstack_index == thr->callstack_top - 1);
cat = thr->catchstack + thr->catchstack_top - 1;
/* CATCH flag may be enabled or disabled here; it may be enabled if
* the statement has a catch block but the try block does not throw
* an error.
*/
DUK_ASSERT(!DUK_CAT_HAS_FINALLY_ENABLED(cat)); /* cleared before entering finally */
/* XXX: assert idx_base */
DUK_DDD(DUK_DDDPRINT("ENDFIN: completion value=%!T, type=%!T",
(duk_tval *) (thr->valstack + cat->idx_base + 0),
(duk_tval *) (thr->valstack + cat->idx_base + 1)));
tv1 = thr->valstack + cat->idx_base + 1; /* type */
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv1));
cont_type = (duk_small_uint_t) DUK_TVAL_GET_NUMBER(tv1);
switch (cont_type) {
case DUK_LJ_TYPE_NORMAL: {
DUK_DDD(DUK_DDDPRINT("ENDFIN: finally part finishing with 'normal' (non-abrupt) completion -> "
"dismantle catcher, resume execution after ENDFIN"));
duk_hthread_catchstack_unwind(thr, thr->catchstack_top - 1);
/* no need to unwind callstack */
goto restart_execution;
}
case DUK_LJ_TYPE_RETURN: {
DUK_DDD(DUK_DDDPRINT("ENDFIN: finally part finishing with 'return' complation -> dismantle "
"catcher, handle return, lj.value1=%!T", thr->valstack + cat->idx_base));
/* Not necessary to unwind catchstack: return handling will
* do it. The finally flag of 'cat' is no longer set. The
* catch flag may be set, but it's not checked by return handling.
*/
DUK_ASSERT(!DUK_CAT_HAS_FINALLY_ENABLED(cat)); /* cleared before entering finally */
#if 0
duk_hthread_catchstack_unwind(thr, thr->catchstack_top - 1);
#endif
duk_push_tval(ctx, thr->valstack + cat->idx_base);
ret_result = duk__handle_return(thr,
entry_thread,
entry_callstack_top);
if (ret_result == DUK__RETHAND_RESTART) {
goto restart_execution;
}
DUK_ASSERT(ret_result == DUK__RETHAND_FINISHED);
DUK_DDD(DUK_DDDPRINT("exiting executor after ENDFIN and RETURN (pseudo) longjmp type"));
return;
}
case DUK_LJ_TYPE_BREAK:
case DUK_LJ_TYPE_CONTINUE: {
duk_uint_t label_id;
duk_small_uint_t lj_type;
/* Not necessary to unwind catchstack: break/continue
* handling will do it. The finally flag of 'cat' is
* no longer set. The catch flag may be set, but it's
* not checked by break/continue handling.
*/
#if 0
duk_hthread_catchstack_unwind(thr, thr->catchstack_top - 1);
#endif
tv1 = thr->valstack + cat->idx_base;
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv1));
#if defined(DUK_USE_FASTINT)
DUK_ASSERT(DUK_TVAL_IS_FASTINT(tv1));
label_id = (duk_small_uint_t) DUK_TVAL_GET_FASTINT_U32(tv1);
#else
label_id = (duk_small_uint_t) DUK_TVAL_GET_NUMBER(tv1);
#endif
lj_type = cont_type;
duk__handle_break_or_continue(thr, label_id, lj_type);
goto restart_execution;
}
default: {
DUK_DDD(DUK_DDDPRINT("ENDFIN: finally part finishing with abrupt completion, lj_type=%ld -> "
"dismantle catcher, re-throw error",
(long) cont_type));
duk_push_tval(ctx, thr->valstack + cat->idx_base);
duk_err_setup_heap_ljstate(thr, (duk_small_int_t) cont_type);
DUK_ASSERT(thr->heap->lj.jmpbuf_ptr != NULL); /* always in executor */
duk_err_longjmp(thr);
DUK_UNREACHABLE();
}
}
/* Must restart in all cases because we NULLed thr->ptr_curr_pc. */
DUK_UNREACHABLE();
break;
}
case DUK_EXTRAOP_THROW: {
duk_context *ctx = (duk_context *) thr;
duk_uint_fast_t bc = DUK_DEC_BC(ins);
/* Note: errors are augmented when they are created, not
* when they are thrown. So, don't augment here, it would
* break re-throwing for instance.
*/
/* Sync so that augmentation sees up-to-date activations, NULL
* thr->ptr_curr_pc so that it's not used if side effects occur
* in augmentation or longjmp handling.
*/
DUK__SYNC_AND_NULL_CURR_PC();
duk_dup(ctx, (duk_idx_t) bc);
DUK_DDD(DUK_DDDPRINT("THROW ERROR (BYTECODE): %!dT (before throw augment)",
(duk_tval *) duk_get_tval(ctx, -1)));
#if defined(DUK_USE_AUGMENT_ERROR_THROW)
duk_err_augment_error_throw(thr);
DUK_DDD(DUK_DDDPRINT("THROW ERROR (BYTECODE): %!dT (after throw augment)",
(duk_tval *) duk_get_tval(ctx, -1)));
#endif
duk_err_setup_heap_ljstate(thr, DUK_LJ_TYPE_THROW);
DUK_ASSERT(thr->heap->lj.jmpbuf_ptr != NULL); /* always in executor */
duk_err_longjmp(thr);
DUK_UNREACHABLE();
break;
}
case DUK_EXTRAOP_INVLHS: {
DUK_ERROR(thr, DUK_ERR_REFERENCE_ERROR, "invalid lvalue");
DUK_UNREACHABLE();
break;
}
case DUK_EXTRAOP_UNM:
case DUK_EXTRAOP_UNP: {
duk_uint_fast_t bc = DUK_DEC_BC(ins);
duk__vm_arith_unary_op(thr, DUK__REGP(bc), bc, extraop);
break;
}
case DUK_EXTRAOP_DEBUGGER: {
/* Opcode only emitted by compiler when debugger
* support is enabled. Ignore it silently without
* debugger support, in case it has been loaded
* from precompiled bytecode.
*/
#if defined(DUK_USE_DEBUGGER_SUPPORT)
if (DUK_HEAP_IS_DEBUGGER_ATTACHED(thr->heap)) {
DUK_D(DUK_DPRINT("DEBUGGER statement encountered, halt execution"));
DUK__SYNC_AND_NULL_CURR_PC();
duk_debug_halt_execution(thr, 1 /*use_prev_pc*/);
DUK_D(DUK_DPRINT("DEBUGGER statement finished, resume execution"));
goto restart_execution;
} else {
DUK_D(DUK_DPRINT("DEBUGGER statement ignored, debugger not attached"));
}
#else
DUK_D(DUK_DPRINT("DEBUGGER statement ignored, no debugger support"));
#endif
break;
}
case DUK_EXTRAOP_BREAK: {
duk_uint_fast_t bc = DUK_DEC_BC(ins);
DUK_DDD(DUK_DDDPRINT("BREAK: %ld", (long) bc));
DUK__SYNC_AND_NULL_CURR_PC();
duk__handle_break_or_continue(thr, (duk_uint_t) bc, DUK_LJ_TYPE_BREAK);
goto restart_execution;
}
case DUK_EXTRAOP_CONTINUE: {
duk_uint_fast_t bc = DUK_DEC_BC(ins);
DUK_DDD(DUK_DDDPRINT("CONTINUE: %ld", (long) bc));
DUK__SYNC_AND_NULL_CURR_PC();
duk__handle_break_or_continue(thr, (duk_uint_t) bc, DUK_LJ_TYPE_CONTINUE);
goto restart_execution;
}
case DUK_EXTRAOP_BNOT: {
duk_uint_fast_t bc = DUK_DEC_BC(ins);
duk__vm_bitwise_not(thr, DUK__REGP(bc), bc);
break;
}
case DUK_EXTRAOP_LNOT: {
duk_uint_fast_t bc = DUK_DEC_BC(ins);
duk_tval *tv1;
tv1 = DUK__REGP(bc);
duk__vm_logical_not(thr, tv1, tv1);
break;
}
case DUK_EXTRAOP_INSTOF: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_bool_t tmp;
tmp = duk_js_instanceof(thr, DUK__REGP(b), DUK__REGCONSTP(c));
duk_push_boolean(ctx, tmp);
duk_replace(ctx, (duk_idx_t) b);
break;
}
case DUK_EXTRAOP_IN: {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_fast_t b = DUK_DEC_B(ins);
duk_small_uint_fast_t c = DUK_DEC_C(ins);
duk_bool_t tmp;
tmp = duk_js_in(thr, DUK__REGP(b), DUK__REGCONSTP(c));
duk_push_boolean(ctx, tmp);
duk_replace(ctx, (duk_idx_t) b);
break;
}
case DUK_EXTRAOP_LABEL: {
duk_catcher *cat;
duk_uint_fast_t bc = DUK_DEC_BC(ins);
/* allocate catcher and populate it (should be atomic) */
duk_hthread_catchstack_grow(thr);
cat = thr->catchstack + thr->catchstack_top;
thr->catchstack_top++;
cat->flags = DUK_CAT_TYPE_LABEL | (bc << DUK_CAT_LABEL_SHIFT);
cat->callstack_index = thr->callstack_top - 1;
cat->pc_base = (duk_instr_t *) curr_pc; /* pre-incremented, points to first jump slot */
cat->idx_base = 0; /* unused for label */
cat->h_varname = NULL;
DUK_DDD(DUK_DDDPRINT("LABEL catcher: flags=0x%08lx, callstack_index=%ld, pc_base=%ld, "
"idx_base=%ld, h_varname=%!O, label_id=%ld",
(long) cat->flags, (long) cat->callstack_index, (long) cat->pc_base,
(long) cat->idx_base, (duk_heaphdr *) cat->h_varname, (long) DUK_CAT_GET_LABEL(cat)));
curr_pc += 2; /* skip jump slots */
break;
}
case DUK_EXTRAOP_ENDLABEL: {
duk_catcher *cat;
#if defined(DUK_USE_DDDPRINT) || defined(DUK_USE_ASSERTIONS)
duk_uint_fast_t bc = DUK_DEC_BC(ins);
#endif
#if defined(DUK_USE_DDDPRINT)
DUK_DDD(DUK_DDDPRINT("ENDLABEL %ld", (long) bc));
#endif
DUK_ASSERT(thr->catchstack_top >= 1);
cat = thr->catchstack + thr->catchstack_top - 1;
DUK_UNREF(cat);
DUK_ASSERT(DUK_CAT_GET_TYPE(cat) == DUK_CAT_TYPE_LABEL);
DUK_ASSERT((duk_uint_fast_t) DUK_CAT_GET_LABEL(cat) == bc);
duk_hthread_catchstack_unwind(thr, thr->catchstack_top - 1);
/* no need to unwind callstack */
break;
}
default: {
DUK__INTERNAL_ERROR("invalid extra opcode");
}
} /* end switch */
break;
}
default: {
/* this should never be possible, because the switch-case is
* comprehensive
*/
DUK__INTERNAL_ERROR("invalid opcode");
break;
}
} /* end switch */
}
DUK_UNREACHABLE();
#ifndef DUK_USE_VERBOSE_EXECUTOR_ERRORS
internal_error:
DUK_ERROR_INTERNAL(thr, "internal error in bytecode executor");
#endif
}
#undef DUK__LONGJMP_RESTART
#undef DUK__LONGJMP_FINISHED
#undef DUK__LONGJMP_RETHROW
#undef DUK__RETHAND_RESTART
#undef DUK__RETHAND_FINISHED
#undef DUK__FUN
#undef DUK__STRICT
#undef DUK__REG
#undef DUK__REGP
#undef DUK__CONST
#undef DUK__CONSTP
#undef DUK__RCISREG
#undef DUK__REGCONST
#undef DUK__REGCONSTP
#undef DUK__INTERNAL_ERROR
#undef DUK__SYNC_CURR_PC
#undef DUK__SYNC_AND_NULL_CURR_PC
#line 1 "duk_js_ops.c"
/*
* Ecmascript specification algorithm and conversion helpers.
*
* These helpers encapsulate the primitive Ecmascript operation
* semantics, and are used by the bytecode executor and the API
* (among other places). Note that some primitives are only
* implemented as part of the API and have no "internal" helper.
* (This is the case when an internal helper would not really be
* useful; e.g. the operation is rare, uses value stack heavily,
* etc.)
*
* The operation arguments depend on what is required to implement
* the operation:
*
* - If an operation is simple and stateless, and has no side
* effects, it won't take an duk_hthread argument and its
* arguments may be duk_tval pointers (which are safe as long
* as no side effects take place).
*
* - If complex coercions are required (e.g. a "ToNumber" coercion)
* or errors may be thrown, the operation takes an duk_hthread
* argument. This also implies that the operation may have
* arbitrary side effects, invalidating any duk_tval pointers.
*
* - For operations with potential side effects, arguments can be
* taken in several ways:
*
* a) as duk_tval pointers, which makes sense if the "common case"
* can be resolved without side effects (e.g. coercion); the
* arguments are pushed to the valstack for coercion if
* necessary
*
* b) as duk_tval values
*
* c) implicitly on value stack top
*
* d) as indices to the value stack
*
* Future work:
*
* - Argument styles may not be the most sensible in every case now.
*
* - In-place coercions might be useful for several operations, if
* in-place coercion is OK for the bytecode executor and the API.
*/
/* include removed: duk_internal.h */
/*
* [[DefaultValue]] (E5 Section 8.12.8)
*
* ==> implemented in the API.
*/
/*
* ToPrimitive() (E5 Section 9.1)
*
* ==> implemented in the API.
*/
/*
* ToBoolean() (E5 Section 9.2)
*/
DUK_INTERNAL duk_bool_t duk_js_toboolean(duk_tval *tv) {
switch (DUK_TVAL_GET_TAG(tv)) {
case DUK_TAG_UNDEFINED:
case DUK_TAG_NULL:
return 0;
case DUK_TAG_BOOLEAN:
return DUK_TVAL_GET_BOOLEAN(tv);
case DUK_TAG_STRING: {
duk_hstring *h = DUK_TVAL_GET_STRING(tv);
DUK_ASSERT(h != NULL);
return (DUK_HSTRING_GET_BYTELEN(h) > 0 ? 1 : 0);
}
case DUK_TAG_OBJECT: {
return 1;
}
case DUK_TAG_BUFFER: {
/* mimic semantics for strings */
duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv);
DUK_ASSERT(h != NULL);
return (DUK_HBUFFER_GET_SIZE(h) > 0 ? 1 : 0);
}
case DUK_TAG_POINTER: {
void *p = DUK_TVAL_GET_POINTER(tv);
return (p != NULL ? 1 : 0);
}
case DUK_TAG_LIGHTFUNC: {
return 1;
}
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT:
if (DUK_TVAL_GET_FASTINT(tv) != 0) {
return 1;
} else {
return 0;
}
#endif
default: {
/* number */
duk_double_t d;
int c;
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv));
DUK_ASSERT(DUK_TVAL_IS_DOUBLE(tv));
d = DUK_TVAL_GET_DOUBLE(tv);
c = DUK_FPCLASSIFY((double) d);
if (c == DUK_FP_ZERO || c == DUK_FP_NAN) {
return 0;
} else {
return 1;
}
}
}
DUK_UNREACHABLE();
}
/*
* ToNumber() (E5 Section 9.3)
*
* Value to convert must be on stack top, and is popped before exit.
*
* See: http://www.cs.indiana.edu/~burger/FP-Printing-PLDI96.pdf
* http://www.cs.indiana.edu/~burger/fp/index.html
*
* Notes on the conversion:
*
* - There are specific requirements on the accuracy of the conversion
* through a "Mathematical Value" (MV), so this conversion is not
* trivial.
*
* - Quick rejects (e.g. based on first char) are difficult because
* the grammar allows leading and trailing white space.
*
* - Quick reject based on string length is difficult even after
* accounting for white space; there may be arbitrarily many
* decimal digits.
*
* - Standard grammar allows decimal values ("123"), hex values
* ("0x123") and infinities
*
* - Unlike source code literals, ToNumber() coerces empty strings
* and strings with only whitespace to zero (not NaN).
*/
/* E5 Section 9.3.1 */
DUK_LOCAL duk_double_t duk__tonumber_string_raw(duk_hthread *thr) {
duk_context *ctx = (duk_context *) thr;
duk_small_uint_t s2n_flags;
duk_double_t d;
/* Quite lenient, e.g. allow empty as zero, but don't allow trailing
* garbage.
*/
s2n_flags = DUK_S2N_FLAG_TRIM_WHITE |
DUK_S2N_FLAG_ALLOW_EXP |
DUK_S2N_FLAG_ALLOW_PLUS |
DUK_S2N_FLAG_ALLOW_MINUS |
DUK_S2N_FLAG_ALLOW_INF |
DUK_S2N_FLAG_ALLOW_FRAC |
DUK_S2N_FLAG_ALLOW_NAKED_FRAC |
DUK_S2N_FLAG_ALLOW_EMPTY_FRAC |
DUK_S2N_FLAG_ALLOW_EMPTY_AS_ZERO |
DUK_S2N_FLAG_ALLOW_LEADING_ZERO |
DUK_S2N_FLAG_ALLOW_AUTO_HEX_INT;
duk_numconv_parse(ctx, 10 /*radix*/, s2n_flags);
d = duk_get_number(ctx, -1);
duk_pop(ctx);
return d;
}
DUK_INTERNAL duk_double_t duk_js_tonumber(duk_hthread *thr, duk_tval *tv) {
duk_context *ctx = (duk_hthread *) thr;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(tv != NULL);
switch (DUK_TVAL_GET_TAG(tv)) {
case DUK_TAG_UNDEFINED: {
/* return a specific NaN (although not strictly necessary) */
duk_double_union du;
DUK_DBLUNION_SET_NAN(&du);
DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&du));
return du.d;
}
case DUK_TAG_NULL: {
/* +0.0 */
return 0.0;
}
case DUK_TAG_BOOLEAN: {
if (DUK_TVAL_IS_BOOLEAN_TRUE(tv)) {
return 1.0;
}
return 0.0;
}
case DUK_TAG_STRING: {
duk_hstring *h = DUK_TVAL_GET_STRING(tv);
duk_push_hstring(ctx, h);
return duk__tonumber_string_raw(thr);
}
case DUK_TAG_OBJECT: {
/* Note: ToPrimitive(object,hint) == [[DefaultValue]](object,hint),
* so use [[DefaultValue]] directly.
*/
duk_double_t d;
duk_push_tval(ctx, tv);
duk_to_defaultvalue(ctx, -1, DUK_HINT_NUMBER); /* 'tv' becomes invalid */
/* recursive call for a primitive value (guaranteed not to cause second
* recursion).
*/
d = duk_js_tonumber(thr, duk_require_tval(ctx, -1));
duk_pop(ctx);
return d;
}
case DUK_TAG_BUFFER: {
/* Coerce like a string. This makes sense because addition also treats
* buffers like strings.
*/
duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv);
duk_push_hbuffer(ctx, h);
duk_to_string(ctx, -1); /* XXX: expensive, but numconv now expects to see a string */
return duk__tonumber_string_raw(thr);
}
case DUK_TAG_POINTER: {
/* Coerce like boolean */
void *p = DUK_TVAL_GET_POINTER(tv);
return (p != NULL ? 1.0 : 0.0);
}
case DUK_TAG_LIGHTFUNC: {
/* +(function(){}) -> NaN */
return DUK_DOUBLE_NAN;
}
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT:
return (duk_double_t) DUK_TVAL_GET_FASTINT(tv);
#endif
default: {
/* number */
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv));
DUK_ASSERT(DUK_TVAL_IS_DOUBLE(tv));
return DUK_TVAL_GET_DOUBLE(tv);
}
}
DUK_UNREACHABLE();
}
/*
* ToInteger() (E5 Section 9.4)
*/
/* exposed, used by e.g. duk_bi_date.c */
DUK_INTERNAL duk_double_t duk_js_tointeger_number(duk_double_t x) {
duk_small_int_t c = (duk_small_int_t) DUK_FPCLASSIFY(x);
if (c == DUK_FP_NAN) {
return 0.0;
} else if (c == DUK_FP_ZERO || c == DUK_FP_INFINITE) {
/* XXX: FP_ZERO check can be removed, the else clause handles it
* correctly (preserving sign).
*/
return x;
} else {
duk_small_int_t s = (duk_small_int_t) DUK_SIGNBIT(x);
x = DUK_FLOOR(DUK_FABS(x)); /* truncate towards zero */
if (s) {
x = -x;
}
return x;
}
}
DUK_INTERNAL duk_double_t duk_js_tointeger(duk_hthread *thr, duk_tval *tv) {
/* XXX: fastint */
duk_double_t d = duk_js_tonumber(thr, tv); /* invalidates tv */
return duk_js_tointeger_number(d);
}
/*
* ToInt32(), ToUint32(), ToUint16() (E5 Sections 9.5, 9.6, 9.7)
*/
/* combined algorithm matching E5 Sections 9.5 and 9.6 */
DUK_LOCAL duk_double_t duk__toint32_touint32_helper(duk_double_t x, duk_bool_t is_toint32) {
duk_small_int_t c = (duk_small_int_t) DUK_FPCLASSIFY(x);
duk_small_int_t s;
if (c == DUK_FP_NAN || c == DUK_FP_ZERO || c == DUK_FP_INFINITE) {
return 0.0;
}
/* x = sign(x) * floor(abs(x)), i.e. truncate towards zero, keep sign */
s = (duk_small_int_t) DUK_SIGNBIT(x);
x = DUK_FLOOR(DUK_FABS(x));
if (s) {
x = -x;
}
/* NOTE: fmod(x) result sign is same as sign of x, which
* differs from what Javascript wants (see Section 9.6).
*/
x = DUK_FMOD(x, DUK_DOUBLE_2TO32); /* -> x in ]-2**32, 2**32[ */
if (x < 0.0) {
x += DUK_DOUBLE_2TO32;
}
/* -> x in [0, 2**32[ */
if (is_toint32) {
if (x >= DUK_DOUBLE_2TO31) {
/* x in [2**31, 2**32[ */
x -= DUK_DOUBLE_2TO32; /* -> x in [-2**31,2**31[ */
}
}
return x;
}
DUK_INTERNAL duk_int32_t duk_js_toint32(duk_hthread *thr, duk_tval *tv) {
duk_double_t d;
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv)) {
return DUK_TVAL_GET_FASTINT_I32(tv);
}
#endif
d = duk_js_tonumber(thr, tv); /* invalidates tv */
d = duk__toint32_touint32_helper(d, 1);
DUK_ASSERT(DUK_FPCLASSIFY(d) == DUK_FP_ZERO || DUK_FPCLASSIFY(d) == DUK_FP_NORMAL);
DUK_ASSERT(d >= -2147483648.0 && d <= 2147483647.0); /* [-0x80000000,0x7fffffff] */
DUK_ASSERT(d == ((duk_double_t) ((duk_int32_t) d))); /* whole, won't clip */
return (duk_int32_t) d;
}
DUK_INTERNAL duk_uint32_t duk_js_touint32(duk_hthread *thr, duk_tval *tv) {
duk_double_t d;
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv)) {
return DUK_TVAL_GET_FASTINT_U32(tv);
}
#endif
d = duk_js_tonumber(thr, tv); /* invalidates tv */
d = duk__toint32_touint32_helper(d, 0);
DUK_ASSERT(DUK_FPCLASSIFY(d) == DUK_FP_ZERO || DUK_FPCLASSIFY(d) == DUK_FP_NORMAL);
DUK_ASSERT(d >= 0.0 && d <= 4294967295.0); /* [0x00000000, 0xffffffff] */
DUK_ASSERT(d == ((duk_double_t) ((duk_uint32_t) d))); /* whole, won't clip */
return (duk_uint32_t) d;
}
DUK_INTERNAL duk_uint16_t duk_js_touint16(duk_hthread *thr, duk_tval *tv) {
/* should be a safe way to compute this */
return (duk_uint16_t) (duk_js_touint32(thr, tv) & 0x0000ffffU);
}
/*
* ToString() (E5 Section 9.8)
*
* ==> implemented in the API.
*/
/*
* ToObject() (E5 Section 9.9)
*
* ==> implemented in the API.
*/
/*
* CheckObjectCoercible() (E5 Section 9.10)
*
* Note: no API equivalent now.
*/
#if 0 /* unused */
DUK_INTERNAL void duk_js_checkobjectcoercible(duk_hthread *thr, duk_tval *tv_x) {
duk_small_uint_t tag = DUK_TVAL_GET_TAG(tv_x);
/* Note: this must match ToObject() behavior */
if (tag == DUK_TAG_UNDEFINED ||
tag == DUK_TAG_NULL ||
tag == DUK_TAG_POINTER ||
tag == DUK_TAG_BUFFER) {
DUK_ERROR_TYPE(thr, "not object coercible");
}
}
#endif
/*
* IsCallable() (E5 Section 9.11)
*
* XXX: API equivalent is a separate implementation now, and this has
* currently no callers.
*/
#if 0 /* unused */
DUK_INTERNAL duk_bool_t duk_js_iscallable(duk_tval *tv_x) {
duk_hobject *obj;
if (!DUK_TVAL_IS_OBJECT(tv_x)) {
return 0;
}
obj = DUK_TVAL_GET_OBJECT(tv_x);
DUK_ASSERT(obj != NULL);
return DUK_HOBJECT_IS_CALLABLE(obj);
}
#endif
/*
* Loose equality, strict equality, and SameValue (E5 Sections 11.9.1, 11.9.4,
* 9.12). These have much in common so they can share some helpers.
*
* Future work notes:
*
* - Current implementation (and spec definition) has recursion; this should
* be fixed if possible.
*
* - String-to-number coercion should be possible without going through the
* value stack (and be more compact) if a shared helper is invoked.
*/
/* Note that this is the same operation for strict and loose equality:
* - E5 Section 11.9.3, step 1.c (loose)
* - E5 Section 11.9.6, step 4 (strict)
*/
DUK_LOCAL duk_bool_t duk__js_equals_number(duk_double_t x, duk_double_t y) {
#if defined(DUK_USE_PARANOID_MATH)
/* Straightforward algorithm, makes fewer compiler assumptions. */
duk_small_int_t cx = (duk_small_int_t) DUK_FPCLASSIFY(x);
duk_small_int_t cy = (duk_small_int_t) DUK_FPCLASSIFY(y);
if (cx == DUK_FP_NAN || cy == DUK_FP_NAN) {
return 0;
}
if (cx == DUK_FP_ZERO && cy == DUK_FP_ZERO) {
return 1;
}
if (x == y) {
return 1;
}
return 0;
#else /* DUK_USE_PARANOID_MATH */
/* Better equivalent algorithm. If the compiler is compliant, C and
* Ecmascript semantics are identical for this particular comparison.
* In particular, NaNs must never compare equal and zeroes must compare
* equal regardless of sign. Could also use a macro, but this inlines
* already nicely (no difference on gcc, for instance).
*/
if (x == y) {
/* IEEE requires that NaNs compare false */
DUK_ASSERT(DUK_FPCLASSIFY(x) != DUK_FP_NAN);
DUK_ASSERT(DUK_FPCLASSIFY(y) != DUK_FP_NAN);
return 1;
} else {
/* IEEE requires that zeros compare the same regardless
* of their signed, so if both x and y are zeroes, they
* are caught above.
*/
DUK_ASSERT(!(DUK_FPCLASSIFY(x) == DUK_FP_ZERO && DUK_FPCLASSIFY(y) == DUK_FP_ZERO));
return 0;
}
#endif /* DUK_USE_PARANOID_MATH */
}
DUK_LOCAL duk_bool_t duk__js_samevalue_number(duk_double_t x, duk_double_t y) {
#if defined(DUK_USE_PARANOID_MATH)
duk_small_int_t cx = (duk_small_int_t) DUK_FPCLASSIFY(x);
duk_small_int_t cy = (duk_small_int_t) DUK_FPCLASSIFY(y);
if (cx == DUK_FP_NAN && cy == DUK_FP_NAN) {
/* SameValue(NaN, NaN) = true, regardless of NaN sign or extra bits */
return 1;
}
if (cx == DUK_FP_ZERO && cy == DUK_FP_ZERO) {
/* Note: cannot assume that a non-zero return value of signbit() would
* always be the same -- hence cannot (portably) use something like:
*
* signbit(x) == signbit(y)
*/
duk_small_int_t sx = (DUK_SIGNBIT(x) ? 1 : 0);
duk_small_int_t sy = (DUK_SIGNBIT(y) ? 1 : 0);
return (sx == sy);
}
/* normal comparison; known:
* - both x and y are not NaNs (but one of them can be)
* - both x and y are not zero (but one of them can be)
* - x and y may be denormal or infinite
*/
return (x == y);
#else /* DUK_USE_PARANOID_MATH */
duk_small_int_t cx = (duk_small_int_t) DUK_FPCLASSIFY(x);
duk_small_int_t cy = (duk_small_int_t) DUK_FPCLASSIFY(y);
if (x == y) {
/* IEEE requires that NaNs compare false */
DUK_ASSERT(DUK_FPCLASSIFY(x) != DUK_FP_NAN);
DUK_ASSERT(DUK_FPCLASSIFY(y) != DUK_FP_NAN);
/* Using classification has smaller footprint than direct comparison. */
if (DUK_UNLIKELY(cx == DUK_FP_ZERO && cy == DUK_FP_ZERO)) {
/* Note: cannot assume that a non-zero return value of signbit() would
* always be the same -- hence cannot (portably) use something like:
*
* signbit(x) == signbit(y)
*/
duk_small_int_t sx = (DUK_SIGNBIT(x) ? 1 : 0);
duk_small_int_t sy = (DUK_SIGNBIT(y) ? 1 : 0);
return (sx == sy);
}
return 1;
} else {
/* IEEE requires that zeros compare the same regardless
* of their signed, so if both x and y are zeroes, they
* are caught above.
*/
DUK_ASSERT(!(DUK_FPCLASSIFY(x) == DUK_FP_ZERO && DUK_FPCLASSIFY(y) == DUK_FP_ZERO));
/* Difference to non-strict/strict comparison is that NaNs compare
* equal and signed zero signs matter.
*/
if (DUK_UNLIKELY(cx == DUK_FP_NAN && cy == DUK_FP_NAN)) {
/* SameValue(NaN, NaN) = true, regardless of NaN sign or extra bits */
return 1;
}
return 0;
}
#endif /* DUK_USE_PARANOID_MATH */
}
DUK_INTERNAL duk_bool_t duk_js_equals_helper(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y, duk_small_int_t flags) {
duk_context *ctx = (duk_context *) thr;
duk_tval *tv_tmp;
/* If flags != 0 (strict or SameValue), thr can be NULL. For loose
* equals comparison it must be != NULL.
*/
DUK_ASSERT(flags != 0 || thr != NULL);
/*
* Same type?
*
* Note: since number values have no explicit tag in the 8-byte
* representation, need the awkward if + switch.
*/
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv_x) && DUK_TVAL_IS_FASTINT(tv_y)) {
if (DUK_TVAL_GET_FASTINT(tv_x) == DUK_TVAL_GET_FASTINT(tv_y)) {
return 1;
} else {
return 0;
}
}
else
#endif
if (DUK_TVAL_IS_NUMBER(tv_x) && DUK_TVAL_IS_NUMBER(tv_y)) {
/* Catches both doubles and cases where only one argument is a fastint */
if (DUK_UNLIKELY((flags & DUK_EQUALS_FLAG_SAMEVALUE) != 0)) {
/* SameValue */
return duk__js_samevalue_number(DUK_TVAL_GET_NUMBER(tv_x),
DUK_TVAL_GET_NUMBER(tv_y));
} else {
/* equals and strict equals */
return duk__js_equals_number(DUK_TVAL_GET_NUMBER(tv_x),
DUK_TVAL_GET_NUMBER(tv_y));
}
} else if (DUK_TVAL_GET_TAG(tv_x) == DUK_TVAL_GET_TAG(tv_y)) {
switch (DUK_TVAL_GET_TAG(tv_x)) {
case DUK_TAG_UNDEFINED:
case DUK_TAG_NULL: {
return 1;
}
case DUK_TAG_BOOLEAN: {
return DUK_TVAL_GET_BOOLEAN(tv_x) == DUK_TVAL_GET_BOOLEAN(tv_y);
}
case DUK_TAG_POINTER: {
return DUK_TVAL_GET_POINTER(tv_x) == DUK_TVAL_GET_POINTER(tv_y);
}
case DUK_TAG_STRING:
case DUK_TAG_OBJECT: {
/* heap pointer comparison suffices */
return DUK_TVAL_GET_HEAPHDR(tv_x) == DUK_TVAL_GET_HEAPHDR(tv_y);
}
case DUK_TAG_BUFFER: {
if ((flags & (DUK_EQUALS_FLAG_STRICT | DUK_EQUALS_FLAG_SAMEVALUE)) != 0) {
/* heap pointer comparison suffices */
return DUK_TVAL_GET_HEAPHDR(tv_x) == DUK_TVAL_GET_HEAPHDR(tv_y);
} else {
/* non-strict equality for buffers compares contents */
duk_hbuffer *h_x = DUK_TVAL_GET_BUFFER(tv_x);
duk_hbuffer *h_y = DUK_TVAL_GET_BUFFER(tv_y);
duk_size_t len_x = DUK_HBUFFER_GET_SIZE(h_x);
duk_size_t len_y = DUK_HBUFFER_GET_SIZE(h_y);
void *buf_x;
void *buf_y;
if (len_x != len_y) {
return 0;
}
buf_x = (void *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_x);
buf_y = (void *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_y);
/* if len_x == len_y == 0, buf_x and/or buf_y may
* be NULL, but that's OK.
*/
DUK_ASSERT(len_x == len_y);
DUK_ASSERT(len_x == 0 || buf_x != NULL);
DUK_ASSERT(len_y == 0 || buf_y != NULL);
return (DUK_MEMCMP((const void *) buf_x, (const void *) buf_y, (size_t) len_x) == 0) ? 1 : 0;
}
}
case DUK_TAG_LIGHTFUNC: {
/* At least 'magic' has a significant impact on function
* identity.
*/
duk_small_uint_t lf_flags_x;
duk_small_uint_t lf_flags_y;
duk_c_function func_x;
duk_c_function func_y;
DUK_TVAL_GET_LIGHTFUNC(tv_x, func_x, lf_flags_x);
DUK_TVAL_GET_LIGHTFUNC(tv_y, func_y, lf_flags_y);
return ((func_x == func_y) && (lf_flags_x == lf_flags_y)) ? 1 : 0;
}
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT:
#endif
default: {
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv_x));
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv_y));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_x));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_y));
DUK_UNREACHABLE();
return 0;
}
}
}
if ((flags & (DUK_EQUALS_FLAG_STRICT | DUK_EQUALS_FLAG_SAMEVALUE)) != 0) {
return 0;
}
DUK_ASSERT(flags == 0); /* non-strict equality from here on */
/*
* Types are different; various cases for non-strict comparison
*
* Since comparison is symmetric, we use a "swap trick" to reduce
* code size.
*/
/* Undefined/null are considered equal (e.g. "null == undefined" -> true). */
if ((DUK_TVAL_IS_UNDEFINED(tv_x) && DUK_TVAL_IS_NULL(tv_y)) ||
(DUK_TVAL_IS_NULL(tv_x) && DUK_TVAL_IS_UNDEFINED(tv_y))) {
return 1;
}
/* Number/string-or-buffer -> coerce string to number (e.g. "'1.5' == 1.5" -> true). */
if (DUK_TVAL_IS_NUMBER(tv_x) && (DUK_TVAL_IS_STRING(tv_y) || DUK_TVAL_IS_BUFFER(tv_y))) {
/* the next 'if' is guaranteed to match after swap */
tv_tmp = tv_x;
tv_x = tv_y;
tv_y = tv_tmp;
}
if ((DUK_TVAL_IS_STRING(tv_x) || DUK_TVAL_IS_BUFFER(tv_x)) && DUK_TVAL_IS_NUMBER(tv_y)) {
/* XXX: this is possible without resorting to the value stack */
duk_double_t d1, d2;
d2 = DUK_TVAL_GET_NUMBER(tv_y);
duk_push_tval(ctx, tv_x);
duk_to_string(ctx, -1); /* buffer values are coerced first to string here */
duk_to_number(ctx, -1);
d1 = duk_require_number(ctx, -1);
duk_pop(ctx);
return duk__js_equals_number(d1, d2);
}
/* Buffer/string -> compare contents. */
if (DUK_TVAL_IS_BUFFER(tv_x) && DUK_TVAL_IS_STRING(tv_y)) {
tv_tmp = tv_x;
tv_x = tv_y;
tv_y = tv_tmp;
}
if (DUK_TVAL_IS_STRING(tv_x) && DUK_TVAL_IS_BUFFER(tv_y)) {
duk_hstring *h_x = DUK_TVAL_GET_STRING(tv_x);
duk_hbuffer *h_y = DUK_TVAL_GET_BUFFER(tv_y);
duk_size_t len_x = DUK_HSTRING_GET_BYTELEN(h_x);
duk_size_t len_y = DUK_HBUFFER_GET_SIZE(h_y);
const void *buf_x;
const void *buf_y;
if (len_x != len_y) {
return 0;
}
buf_x = (const void *) DUK_HSTRING_GET_DATA(h_x);
buf_y = (const void *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_y);
/* if len_x == len_y == 0, buf_x and/or buf_y may
* be NULL, but that's OK.
*/
DUK_ASSERT(len_x == len_y);
DUK_ASSERT(len_x == 0 || buf_x != NULL);
DUK_ASSERT(len_y == 0 || buf_y != NULL);
return (DUK_MEMCMP((const void *) buf_x, (const void *) buf_y, (size_t) len_x) == 0) ? 1 : 0;
}
/* Boolean/any -> coerce boolean to number and try again. If boolean is
* compared to a pointer, the final comparison after coercion now always
* yields false (as pointer vs. number compares to false), but this is
* not special cased.
*/
if (DUK_TVAL_IS_BOOLEAN(tv_x)) {
tv_tmp = tv_x;
tv_x = tv_y;
tv_y = tv_tmp;
}
if (DUK_TVAL_IS_BOOLEAN(tv_y)) {
/* ToNumber(bool) is +1.0 or 0.0. Tagged boolean value is always 0 or 1. */
duk_bool_t rc;
DUK_ASSERT(DUK_TVAL_GET_BOOLEAN(tv_y) == 0 || DUK_TVAL_GET_BOOLEAN(tv_y) == 1);
duk_push_tval(ctx, tv_x);
duk_push_int(ctx, DUK_TVAL_GET_BOOLEAN(tv_y));
rc = duk_js_equals_helper(thr,
DUK_GET_TVAL_NEGIDX(ctx, -2),
DUK_GET_TVAL_NEGIDX(ctx, -1),
0 /*flags:nonstrict*/);
duk_pop_2(ctx);
return rc;
}
/* String-number-buffer/object -> coerce object to primitive (apparently without hint), then try again. */
if ((DUK_TVAL_IS_STRING(tv_x) || DUK_TVAL_IS_NUMBER(tv_x) || DUK_TVAL_IS_BUFFER(tv_x)) &&
DUK_TVAL_IS_OBJECT(tv_y)) {
tv_tmp = tv_x;
tv_x = tv_y;
tv_y = tv_tmp;
}
if (DUK_TVAL_IS_OBJECT(tv_x) &&
(DUK_TVAL_IS_STRING(tv_y) || DUK_TVAL_IS_NUMBER(tv_y) || DUK_TVAL_IS_BUFFER(tv_y))) {
duk_bool_t rc;
duk_push_tval(ctx, tv_x);
duk_push_tval(ctx, tv_y);
duk_to_primitive(ctx, -2, DUK_HINT_NONE); /* apparently no hint? */
rc = duk_js_equals_helper(thr,
DUK_GET_TVAL_NEGIDX(ctx, -2),
DUK_GET_TVAL_NEGIDX(ctx, -1),
0 /*flags:nonstrict*/);
duk_pop_2(ctx);
return rc;
}
/* Nothing worked -> not equal. */
return 0;
}
/*
* Comparisons (x >= y, x > y, x <= y, x < y)
*
* E5 Section 11.8.5: implement 'x < y' and then use negate and eval_left_first
* flags to get the rest.
*/
/* XXX: this should probably just operate on the stack top, because it
* needs to push stuff on the stack anyway...
*/
DUK_INTERNAL duk_small_int_t duk_js_data_compare(const duk_uint8_t *buf1, const duk_uint8_t *buf2, duk_size_t len1, duk_size_t len2) {
duk_size_t prefix_len;
duk_small_int_t rc;
prefix_len = (len1 <= len2 ? len1 : len2);
/* DUK_MEMCMP() is guaranteed to return zero (equal) for zero length
* inputs so no zero length check is needed.
*/
rc = DUK_MEMCMP((const void *) buf1,
(const void *) buf2,
(size_t) prefix_len);
if (rc < 0) {
return -1;
} else if (rc > 0) {
return 1;
}
/* prefix matches, lengths matter now */
if (len1 < len2) {
/* e.g. "x" < "xx" */
return -1;
} else if (len1 > len2) {
return 1;
}
return 0;
}
DUK_INTERNAL duk_small_int_t duk_js_string_compare(duk_hstring *h1, duk_hstring *h2) {
/*
* String comparison (E5 Section 11.8.5, step 4), which
* needs to compare codepoint by codepoint.
*
* However, UTF-8 allows us to use strcmp directly: the shared
* prefix will be encoded identically (UTF-8 has unique encoding)
* and the first differing character can be compared with a simple
* unsigned byte comparison (which strcmp does).
*
* This will not work properly for non-xutf-8 strings, but this
* is not an issue for compliance.
*/
DUK_ASSERT(h1 != NULL);
DUK_ASSERT(h2 != NULL);
return duk_js_data_compare((const duk_uint8_t *) DUK_HSTRING_GET_DATA(h1),
(const duk_uint8_t *) DUK_HSTRING_GET_DATA(h2),
(duk_size_t) DUK_HSTRING_GET_BYTELEN(h1),
(duk_size_t) DUK_HSTRING_GET_BYTELEN(h2));
}
#if 0 /* unused */
DUK_INTERNAL duk_small_int_t duk_js_buffer_compare(duk_heap *heap, duk_hbuffer *h1, duk_hbuffer *h2) {
/* Similar to String comparison. */
DUK_ASSERT(h1 != NULL);
DUK_ASSERT(h2 != NULL);
DUK_UNREF(heap);
return duk_js_data_compare((const duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(heap, h1),
(const duk_uint8_t *) DUK_HBUFFER_GET_DATA_PTR(heap, h2),
(duk_size_t) DUK_HBUFFER_GET_SIZE(h1),
(duk_size_t) DUK_HBUFFER_GET_SIZE(h2));
}
#endif
DUK_INTERNAL duk_bool_t duk_js_compare_helper(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y, duk_small_int_t flags) {
duk_context *ctx = (duk_context *) thr;
duk_double_t d1, d2;
duk_small_int_t c1, c2;
duk_small_int_t s1, s2;
duk_small_int_t rc;
duk_bool_t retval;
/* Fast path for fastints */
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv_x) && DUK_TVAL_IS_FASTINT(tv_y)) {
duk_int64_t v1 = DUK_TVAL_GET_FASTINT(tv_x);
duk_int64_t v2 = DUK_TVAL_GET_FASTINT(tv_y);
if (v1 < v2) {
/* 'lt is true' */
retval = 1;
} else {
retval = 0;
}
if (flags & DUK_COMPARE_FLAG_NEGATE) {
retval ^= 1;
}
return retval;
}
#endif /* DUK_USE_FASTINT */
/* Fast path for numbers (one of which may be a fastint) */
#if 1 /* XXX: make fast paths optional for size minimization? */
if (DUK_TVAL_IS_NUMBER(tv_x) && DUK_TVAL_IS_NUMBER(tv_y)) {
d1 = DUK_TVAL_GET_NUMBER(tv_x);
d2 = DUK_TVAL_GET_NUMBER(tv_y);
c1 = DUK_FPCLASSIFY(d1);
c2 = DUK_FPCLASSIFY(d2);
if (c1 == DUK_FP_NORMAL && c2 == DUK_FP_NORMAL) {
/* XXX: this is a very narrow check, and doesn't cover
* zeroes, subnormals, infinities, which compare normally.
*/
if (d1 < d2) {
/* 'lt is true' */
retval = 1;
} else {
retval = 0;
}
if (flags & DUK_COMPARE_FLAG_NEGATE) {
retval ^= 1;
}
return retval;
}
}
#endif
/* Slow path */
duk_push_tval(ctx, tv_x);
duk_push_tval(ctx, tv_y);
if (flags & DUK_COMPARE_FLAG_EVAL_LEFT_FIRST) {
duk_to_primitive(ctx, -2, DUK_HINT_NUMBER);
duk_to_primitive(ctx, -1, DUK_HINT_NUMBER);
} else {
duk_to_primitive(ctx, -1, DUK_HINT_NUMBER);
duk_to_primitive(ctx, -2, DUK_HINT_NUMBER);
}
/* Note: reuse variables */
tv_x = DUK_GET_TVAL_NEGIDX(ctx, -2);
tv_y = DUK_GET_TVAL_NEGIDX(ctx, -1);
if (DUK_TVAL_IS_STRING(tv_x) && DUK_TVAL_IS_STRING(tv_y)) {
duk_hstring *h1 = DUK_TVAL_GET_STRING(tv_x);
duk_hstring *h2 = DUK_TVAL_GET_STRING(tv_y);
DUK_ASSERT(h1 != NULL);
DUK_ASSERT(h2 != NULL);
rc = duk_js_string_compare(h1, h2);
if (rc < 0) {
goto lt_true;
} else {
goto lt_false;
}
} else {
/* Ordering should not matter (E5 Section 11.8.5, step 3.a) but
* preserve it just in case.
*/
if (flags & DUK_COMPARE_FLAG_EVAL_LEFT_FIRST) {
d1 = duk_to_number(ctx, -2);
d2 = duk_to_number(ctx, -1);
} else {
d2 = duk_to_number(ctx, -1);
d1 = duk_to_number(ctx, -2);
}
c1 = (duk_small_int_t) DUK_FPCLASSIFY(d1);
s1 = (duk_small_int_t) DUK_SIGNBIT(d1);
c2 = (duk_small_int_t) DUK_FPCLASSIFY(d2);
s2 = (duk_small_int_t) DUK_SIGNBIT(d2);
if (c1 == DUK_FP_NAN || c2 == DUK_FP_NAN) {
goto lt_undefined;
}
if (c1 == DUK_FP_ZERO && c2 == DUK_FP_ZERO) {
/* For all combinations: +0 < +0, +0 < -0, -0 < +0, -0 < -0,
* steps e, f, and g.
*/
goto lt_false;
}
if (d1 == d2) {
goto lt_false;
}
if (c1 == DUK_FP_INFINITE && s1 == 0) {
/* x == +Infinity */
goto lt_false;
}
if (c2 == DUK_FP_INFINITE && s2 == 0) {
/* y == +Infinity */
goto lt_true;
}
if (c2 == DUK_FP_INFINITE && s2 != 0) {
/* y == -Infinity */
goto lt_false;
}
if (c1 == DUK_FP_INFINITE && s1 != 0) {
/* x == -Infinity */
goto lt_true;
}
if (d1 < d2) {
goto lt_true;
}
goto lt_false;
}
lt_undefined:
/* Note: undefined from Section 11.8.5 always results in false
* return (see e.g. Section 11.8.3) - hence special treatment here.
*/
retval = 0;
goto cleanup;
lt_true:
if (flags & DUK_COMPARE_FLAG_NEGATE) {
retval = 0;
goto cleanup;
} else {
retval = 1;
goto cleanup;
}
/* never here */
lt_false:
if (flags & DUK_COMPARE_FLAG_NEGATE) {
retval = 1;
goto cleanup;
} else {
retval = 0;
goto cleanup;
}
/* never here */
cleanup:
duk_pop_2(ctx);
return retval;
}
/*
* instanceof
*/
/*
* E5 Section 11.8.6 describes the main algorithm, which uses
* [[HasInstance]]. [[HasInstance]] is defined for only
* function objects:
*
* - Normal functions:
* E5 Section 15.3.5.3
* - Functions established with Function.prototype.bind():
* E5 Section 15.3.4.5.3
*
* For other objects, a TypeError is thrown.
*
* Limited Proxy support: don't support 'getPrototypeOf' trap but
* continue lookup in Proxy target if the value is a Proxy.
*/
DUK_INTERNAL duk_bool_t duk_js_instanceof(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y) {
duk_context *ctx = (duk_context *) thr;
duk_hobject *func;
duk_hobject *val;
duk_hobject *proto;
duk_uint_t sanity;
/*
* Get the values onto the stack first. It would be possible to cover
* some normal cases without resorting to the value stack.
*
* The right hand side could be a light function (as they generally
* behave like objects). Light functions never have a 'prototype'
* property so E5.1 Section 15.3.5.3 step 3 always throws a TypeError.
* Using duk_require_hobject() is thus correct (except for error msg).
*/
duk_push_tval(ctx, tv_x);
duk_push_tval(ctx, tv_y);
func = duk_require_hobject(ctx, -1);
/*
* For bound objects, [[HasInstance]] just calls the target function
* [[HasInstance]]. If that is again a bound object, repeat until
* we find a non-bound Function object.
*/
/* XXX: this bound function resolution also happens elsewhere,
* move into a shared helper.
*/
sanity = DUK_HOBJECT_BOUND_CHAIN_SANITY;
do {
/* check func supports [[HasInstance]] (this is checked for every function
* in the bound chain, including the final one)
*/
if (!DUK_HOBJECT_IS_CALLABLE(func)) {
/*
* Note: of native Ecmascript objects, only Function instances
* have a [[HasInstance]] internal property. Custom objects might
* also have it, but not in current implementation.
*
* XXX: add a separate flag, DUK_HOBJECT_FLAG_ALLOW_INSTANCEOF?
*/
DUK_ERROR_TYPE(thr, "invalid instanceof rval");
}
if (!DUK_HOBJECT_HAS_BOUND(func)) {
break;
}
/* [ ... lval rval ] */
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_TARGET); /* -> [ ... lval rval new_rval ] */
duk_replace(ctx, -1); /* -> [ ... lval new_rval ] */
func = duk_require_hobject(ctx, -1);
/* func support for [[HasInstance]] checked in the beginning of the loop */
} while (--sanity > 0);
if (sanity == 0) {
DUK_ERROR_RANGE(thr, DUK_STR_BOUND_CHAIN_LIMIT);
}
/*
* 'func' is now a non-bound object which supports [[HasInstance]]
* (which here just means DUK_HOBJECT_FLAG_CALLABLE). Move on
* to execute E5 Section 15.3.5.3.
*/
DUK_ASSERT(!DUK_HOBJECT_HAS_BOUND(func));
DUK_ASSERT(DUK_HOBJECT_IS_CALLABLE(func));
/* [ ... lval rval(func) ] */
/* Handle lightfuncs through object coercion for now. */
/* XXX: direct implementation */
val = duk_get_hobject_or_lfunc_coerce(ctx, -2);
if (!val) {
goto pop_and_false;
}
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_PROTOTYPE); /* -> [ ... lval rval rval.prototype ] */
proto = duk_require_hobject(ctx, -1);
duk_pop(ctx); /* -> [ ... lval rval ] */
DUK_ASSERT(val != NULL);
#if defined(DUK_USE_ES6_PROXY)
val = duk_hobject_resolve_proxy_target(thr, val);
DUK_ASSERT(val != NULL);
#endif
sanity = DUK_HOBJECT_PROTOTYPE_CHAIN_SANITY;
do {
/*
* Note: prototype chain is followed BEFORE first comparison. This
* means that the instanceof lval is never itself compared to the
* rval.prototype property. This is apparently intentional, see E5
* Section 15.3.5.3, step 4.a.
*
* Also note:
*
* js> (function() {}) instanceof Function
* true
* js> Function instanceof Function
* true
*
* For the latter, h_proto will be Function.prototype, which is the
* built-in Function prototype. Because Function.[[Prototype]] is
* also the built-in Function prototype, the result is true.
*/
DUK_ASSERT(val != NULL);
val = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, val);
if (!val) {
goto pop_and_false;
}
DUK_ASSERT(val != NULL);
#if defined(DUK_USE_ES6_PROXY)
val = duk_hobject_resolve_proxy_target(thr, val);
#endif
if (val == proto) {
goto pop_and_true;
}
/* follow prototype chain */
} while (--sanity > 0);
if (sanity == 0) {
DUK_ERROR_RANGE(thr, DUK_STR_PROTOTYPE_CHAIN_LIMIT);
}
DUK_UNREACHABLE();
pop_and_false:
duk_pop_2(ctx);
return 0;
pop_and_true:
duk_pop_2(ctx);
return 1;
}
/*
* in
*/
/*
* E5 Sections 11.8.7, 8.12.6.
*
* Basically just a property existence check using [[HasProperty]].
*/
DUK_INTERNAL duk_bool_t duk_js_in(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y) {
duk_context *ctx = (duk_context *) thr;
duk_bool_t retval;
/*
* Get the values onto the stack first. It would be possible to cover
* some normal cases without resorting to the value stack (e.g. if
* lval is already a string).
*/
/* XXX: The ES5/5.1/6 specifications require that the key in 'key in obj'
* must be string coerced before the internal HasProperty() algorithm is
* invoked. A fast path skipping coercion could be safely implemented for
* numbers (as number-to-string coercion has no side effects). For ES6
* proxy behavior, the trap 'key' argument must be in a string coerced
* form (which is a shame).
*/
/* TypeError if rval is not an object (or lightfunc which should behave
* like a Function instance).
*/
duk_push_tval(ctx, tv_x);
duk_push_tval(ctx, tv_y);
duk_require_type_mask(ctx, -1, DUK_TYPE_MASK_OBJECT | DUK_TYPE_MASK_LIGHTFUNC);
duk_to_string(ctx, -2); /* coerce lval with ToString() */
retval = duk_hobject_hasprop(thr,
DUK_GET_TVAL_NEGIDX(ctx, -1),
DUK_GET_TVAL_NEGIDX(ctx, -2));
duk_pop_2(ctx);
return retval;
}
/*
* typeof
*
* E5 Section 11.4.3.
*
* Very straightforward. The only question is what to return for our
* non-standard tag / object types.
*
* There is an unfortunate string constant define naming problem with
* typeof return values for e.g. "Object" and "object"; careful with
* the built-in string defines. The LC_XXX defines are used for the
* lowercase variants now.
*/
DUK_INTERNAL duk_hstring *duk_js_typeof(duk_hthread *thr, duk_tval *tv_x) {
duk_small_int_t stridx = 0;
DUK_UNREF(thr);
switch (DUK_TVAL_GET_TAG(tv_x)) {
case DUK_TAG_UNDEFINED: {
stridx = DUK_STRIDX_LC_UNDEFINED;
break;
}
case DUK_TAG_NULL: {
/* Note: not a typo, "object" is returned for a null value */
stridx = DUK_STRIDX_LC_OBJECT;
break;
}
case DUK_TAG_BOOLEAN: {
stridx = DUK_STRIDX_LC_BOOLEAN;
break;
}
case DUK_TAG_POINTER: {
/* implementation specific */
stridx = DUK_STRIDX_LC_POINTER;
break;
}
case DUK_TAG_STRING: {
stridx = DUK_STRIDX_LC_STRING;
break;
}
case DUK_TAG_OBJECT: {
duk_hobject *obj = DUK_TVAL_GET_OBJECT(tv_x);
DUK_ASSERT(obj != NULL);
if (DUK_HOBJECT_IS_CALLABLE(obj)) {
stridx = DUK_STRIDX_LC_FUNCTION;
} else {
stridx = DUK_STRIDX_LC_OBJECT;
}
break;
}
case DUK_TAG_BUFFER: {
/* implementation specific */
stridx = DUK_STRIDX_LC_BUFFER;
break;
}
case DUK_TAG_LIGHTFUNC: {
stridx = DUK_STRIDX_LC_FUNCTION;
break;
}
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT:
#endif
default: {
/* number */
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv_x));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_x));
stridx = DUK_STRIDX_LC_NUMBER;
break;
}
}
DUK_ASSERT(stridx >= 0 && stridx < DUK_HEAP_NUM_STRINGS);
return DUK_HTHREAD_GET_STRING(thr, stridx);
}
/*
* Array index and length
*
* Array index: E5 Section 15.4
* Array length: E5 Section 15.4.5.1 steps 3.c - 3.d (array length write)
*
* The DUK_HSTRING_GET_ARRIDX_SLOW() and DUK_HSTRING_GET_ARRIDX_FAST() macros
* call duk_js_to_arrayindex_string_helper().
*/
DUK_INTERNAL duk_small_int_t duk_js_to_arrayindex_raw_string(const duk_uint8_t *str, duk_uint32_t blen, duk_uarridx_t *out_idx) {
duk_uarridx_t res, new_res;
if (blen == 0 || blen > 10) {
goto parse_fail;
}
if (str[0] == (duk_uint8_t) '0' && blen > 1) {
goto parse_fail;
}
/* Accept 32-bit decimal integers, no leading zeroes, signs, etc.
* Leading zeroes are not accepted (zero index "0" is an exception
* handled above).
*/
res = 0;
while (blen-- > 0) {
duk_uint8_t c = *str++;
if (c >= (duk_uint8_t) '0' && c <= (duk_uint8_t) '9') {
new_res = res * 10 + (duk_uint32_t) (c - (duk_uint8_t) '0');
if (new_res < res) {
/* overflow, more than 32 bits -> not an array index */
goto parse_fail;
}
res = new_res;
} else {
goto parse_fail;
}
}
*out_idx = res;
return 1;
parse_fail:
*out_idx = DUK_HSTRING_NO_ARRAY_INDEX;
return 0;
}
/* Called by duk_hstring.h macros */
DUK_INTERNAL duk_uarridx_t duk_js_to_arrayindex_string_helper(duk_hstring *h) {
duk_uarridx_t res;
duk_small_int_t rc;
if (!DUK_HSTRING_HAS_ARRIDX(h)) {
return DUK_HSTRING_NO_ARRAY_INDEX;
}
rc = duk_js_to_arrayindex_raw_string(DUK_HSTRING_GET_DATA(h),
DUK_HSTRING_GET_BYTELEN(h),
&res);
DUK_UNREF(rc);
DUK_ASSERT(rc != 0);
return res;
}
#line 1 "duk_js_var.c"
/*
* Identifier access and function closure handling.
*
* Provides the primitives for slow path identifier accesses: GETVAR,
* PUTVAR, DELVAR, etc. The fast path, direct register accesses, should
* be used for most identifier accesses. Consequently, these slow path
* primitives should be optimized for maximum compactness.
*
* Ecmascript environment records (declarative and object) are represented
* as internal objects with control keys. Environment records have a
* parent record ("outer environment reference") which is represented by
* the implicit prototype for technical reasons (in other words, it is a
* convenient field). The prototype chain is not followed in the ordinary
* sense for variable lookups.
*
* See identifier-handling.rst for more details on the identifier algorithms
* and the internal representation. See function-objects.rst for details on
* what function templates and instances are expected to look like.
*
* Care must be taken to avoid duk_tval pointer invalidation caused by
* e.g. value stack or object resizing.
*
* TODO: properties for function instances could be initialized much more
* efficiently by creating a property allocation for a certain size and
* filling in keys and values directly (and INCREFing both with "bulk incref"
* primitives.
*
* XXX: duk_hobject_getprop() and duk_hobject_putprop() calls are a bit
* awkward (especially because they follow the prototype chain); rework
* if "raw" own property helpers are added.
*/
/* include removed: duk_internal.h */
/*
* Local result type for duk__get_identifier_reference() lookup.
*/
typedef struct {
duk_hobject *holder; /* for object-bound identifiers */
duk_tval *value; /* for register-bound and declarative env identifiers */
duk_int_t attrs; /* property attributes for identifier (relevant if value != NULL) */
duk_tval *this_binding;
duk_hobject *env;
} duk__id_lookup_result;
/*
* Create a new function object based on a "template function" which contains
* compiled bytecode, constants, etc, but lacks a lexical environment.
*
* Ecmascript requires that each created closure is a separate object, with
* its own set of editable properties. However, structured property values
* (such as the formal arguments list and the variable map) are shared.
* Also the bytecode, constants, and inner functions are shared.
*
* See E5 Section 13.2 for detailed requirements on the function objects;
* there are no similar requirements for function "templates" which are an
* implementation dependent internal feature. Also see function-objects.rst
* for a discussion on the function instance properties provided by this
* implementation.
*
* Notes:
*
* * Order of internal properties should match frequency of use, since the
* properties will be linearly scanned on lookup (functions usually don't
* have enough properties to warrant a hash part).
*
* * The created closure is independent of its template; they do share the
* same 'data' buffer object, but the template object itself can be freed
* even if the closure object remains reachable.
*/
DUK_LOCAL void duk__inc_data_inner_refcounts(duk_hthread *thr, duk_hcompiledfunction *f) {
duk_tval *tv, *tv_end;
duk_hobject **funcs, **funcs_end;
DUK_ASSERT(DUK_HCOMPILEDFUNCTION_GET_DATA(thr->heap, f) != NULL); /* compiled functions must be created 'atomically' */
DUK_UNREF(thr);
tv = DUK_HCOMPILEDFUNCTION_GET_CONSTS_BASE(thr->heap, f);
tv_end = DUK_HCOMPILEDFUNCTION_GET_CONSTS_END(thr->heap, f);
while (tv < tv_end) {
DUK_TVAL_INCREF(thr, tv);
tv++;
}
funcs = DUK_HCOMPILEDFUNCTION_GET_FUNCS_BASE(thr->heap, f);
funcs_end = DUK_HCOMPILEDFUNCTION_GET_FUNCS_END(thr->heap, f);
while (funcs < funcs_end) {
DUK_HEAPHDR_INCREF(thr, (duk_heaphdr *) *funcs);
funcs++;
}
}
/* Push a new closure on the stack.
*
* Note: if fun_temp has NEWENV, i.e. a new lexical and variable declaration
* is created when the function is called, only outer_lex_env matters
* (outer_var_env is ignored and may or may not be same as outer_lex_env).
*/
DUK_LOCAL const duk_uint16_t duk__closure_copy_proplist[] = {
/* order: most frequent to least frequent */
DUK_STRIDX_INT_VARMAP,
DUK_STRIDX_INT_FORMALS,
DUK_STRIDX_NAME,
DUK_STRIDX_INT_PC2LINE,
DUK_STRIDX_FILE_NAME,
DUK_STRIDX_INT_SOURCE
};
DUK_INTERNAL
void duk_js_push_closure(duk_hthread *thr,
duk_hcompiledfunction *fun_temp,
duk_hobject *outer_var_env,
duk_hobject *outer_lex_env,
duk_bool_t add_auto_proto) {
duk_context *ctx = (duk_context *) thr;
duk_hcompiledfunction *fun_clos;
duk_small_uint_t i;
duk_uint_t len_value;
DUK_ASSERT(fun_temp != NULL);
DUK_ASSERT(DUK_HCOMPILEDFUNCTION_GET_DATA(thr->heap, fun_temp) != NULL);
DUK_ASSERT(DUK_HCOMPILEDFUNCTION_GET_FUNCS(thr->heap, fun_temp) != NULL);
DUK_ASSERT(DUK_HCOMPILEDFUNCTION_GET_BYTECODE(thr->heap, fun_temp) != NULL);
DUK_ASSERT(outer_var_env != NULL);
DUK_ASSERT(outer_lex_env != NULL);
DUK_UNREF(len_value);
duk_push_compiledfunction(ctx);
duk_push_hobject(ctx, &fun_temp->obj); /* -> [ ... closure template ] */
fun_clos = (duk_hcompiledfunction *) duk_get_hcompiledfunction(ctx, -2);
DUK_ASSERT(fun_clos != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION((duk_hobject *) fun_clos));
DUK_ASSERT(DUK_HCOMPILEDFUNCTION_GET_DATA(thr->heap, fun_clos) == NULL);
DUK_ASSERT(DUK_HCOMPILEDFUNCTION_GET_FUNCS(thr->heap, fun_clos) == NULL);
DUK_ASSERT(DUK_HCOMPILEDFUNCTION_GET_BYTECODE(thr->heap, fun_clos) == NULL);
DUK_HCOMPILEDFUNCTION_SET_DATA(thr->heap, fun_clos, DUK_HCOMPILEDFUNCTION_GET_DATA(thr->heap, fun_temp));
DUK_HCOMPILEDFUNCTION_SET_FUNCS(thr->heap, fun_clos, DUK_HCOMPILEDFUNCTION_GET_FUNCS(thr->heap, fun_temp));
DUK_HCOMPILEDFUNCTION_SET_BYTECODE(thr->heap, fun_clos, DUK_HCOMPILEDFUNCTION_GET_BYTECODE(thr->heap, fun_temp));
/* Note: all references inside 'data' need to get their refcounts
* upped too. This is the case because refcounts are decreased
* through every function referencing 'data' independently.
*/
DUK_HBUFFER_INCREF(thr, DUK_HCOMPILEDFUNCTION_GET_DATA(thr->heap, fun_clos));
duk__inc_data_inner_refcounts(thr, fun_temp);
fun_clos->nregs = fun_temp->nregs;
fun_clos->nargs = fun_temp->nargs;
#if defined(DUK_USE_DEBUGGER_SUPPORT)
fun_clos->start_line = fun_temp->start_line;
fun_clos->end_line = fun_temp->end_line;
#endif
DUK_ASSERT(DUK_HCOMPILEDFUNCTION_GET_DATA(thr->heap, fun_clos) != NULL);
DUK_ASSERT(DUK_HCOMPILEDFUNCTION_GET_FUNCS(thr->heap, fun_clos) != NULL);
DUK_ASSERT(DUK_HCOMPILEDFUNCTION_GET_BYTECODE(thr->heap, fun_clos) != NULL);
/* XXX: could also copy from template, but there's no way to have any
* other value here now (used code has no access to the template).
*/
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, &fun_clos->obj, thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]);
/*
* Init/assert flags, copying them where appropriate. Some flags
* (like NEWENV) are processed separately below.
*/
/* XXX: copy flags using a mask */
DUK_ASSERT(DUK_HOBJECT_HAS_EXTENSIBLE(&fun_clos->obj));
DUK_HOBJECT_SET_CONSTRUCTABLE(&fun_clos->obj); /* Note: not set in template (has no "prototype") */
DUK_ASSERT(DUK_HOBJECT_HAS_CONSTRUCTABLE(&fun_clos->obj));
DUK_ASSERT(!DUK_HOBJECT_HAS_BOUND(&fun_clos->obj));
DUK_ASSERT(DUK_HOBJECT_HAS_COMPILEDFUNCTION(&fun_clos->obj));
DUK_ASSERT(!DUK_HOBJECT_HAS_NATIVEFUNCTION(&fun_clos->obj));
DUK_ASSERT(!DUK_HOBJECT_HAS_THREAD(&fun_clos->obj));
/* DUK_HOBJECT_FLAG_ARRAY_PART: don't care */
if (DUK_HOBJECT_HAS_STRICT(&fun_temp->obj)) {
DUK_HOBJECT_SET_STRICT(&fun_clos->obj);
}
if (DUK_HOBJECT_HAS_NOTAIL(&fun_temp->obj)) {
DUK_HOBJECT_SET_NOTAIL(&fun_clos->obj);
}
/* DUK_HOBJECT_FLAG_NEWENV: handled below */
if (DUK_HOBJECT_HAS_NAMEBINDING(&fun_temp->obj)) {
/* Although NAMEBINDING is not directly needed for using
* function instances, it's needed by bytecode dump/load
* so copy it too.
*/
DUK_HOBJECT_SET_NAMEBINDING(&fun_clos->obj);
}
if (DUK_HOBJECT_HAS_CREATEARGS(&fun_temp->obj)) {
DUK_HOBJECT_SET_CREATEARGS(&fun_clos->obj);
}
DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARRAY(&fun_clos->obj));
DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(&fun_clos->obj));
DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(&fun_clos->obj));
/*
* Setup environment record properties based on the template and
* its flags.
*
* If DUK_HOBJECT_HAS_NEWENV(fun_temp) is true, the environment
* records represent identifiers "outside" the function; the
* "inner" environment records are created on demand. Otherwise,
* the environment records are those that will be directly used
* (e.g. for declarations).
*
* _Lexenv is always set; _Varenv defaults to _Lexenv if missing,
* so _Varenv is only set if _Lexenv != _Varenv.
*
* This is relatively complex, see doc/identifier-handling.rst.
*/
if (DUK_HOBJECT_HAS_NEWENV(&fun_temp->obj)) {
DUK_HOBJECT_SET_NEWENV(&fun_clos->obj);
if (DUK_HOBJECT_HAS_NAMEBINDING(&fun_temp->obj)) {
duk_hobject *proto;
/*
* Named function expression, name needs to be bound
* in an intermediate environment record. The "outer"
* lexical/variable environment will thus be:
*
* a) { funcname: <func>, __prototype: outer_lex_env }
* b) { funcname: <func>, __prototype: <globalenv> } (if outer_lex_env missing)
*/
DUK_ASSERT(duk_has_prop_stridx(ctx, -1, DUK_STRIDX_NAME)); /* required if NAMEBINDING set */
if (outer_lex_env) {
proto = outer_lex_env;
} else {
proto = thr->builtins[DUK_BIDX_GLOBAL_ENV];
}
/* -> [ ... closure template env ] */
(void) duk_push_object_helper_proto(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_DECENV),
proto);
/* It's important that duk_xdef_prop() is a 'raw define' so that any
* properties in an ancestor are never an issue (they should never be
* e.g. non-writable, but just in case).
*/
duk_get_prop_stridx(ctx, -2, DUK_STRIDX_NAME); /* -> [ ... closure template env funcname ] */
duk_dup(ctx, -4); /* -> [ ... closure template env funcname closure ] */
duk_xdef_prop(ctx, -3, DUK_PROPDESC_FLAGS_NONE); /* -> [ ... closure template env ] */
/* env[funcname] = closure */
/* [ ... closure template env ] */
duk_xdef_prop_stridx(ctx, -3, DUK_STRIDX_INT_LEXENV, DUK_PROPDESC_FLAGS_WC);
/* since closure has NEWENV, never define DUK_STRIDX_INT_VARENV, as it
* will be ignored anyway
*/
/* [ ... closure template ] */
} else {
/*
* Other cases (function declaration, anonymous function expression,
* strict direct eval code). The "outer" environment will be whatever
* the caller gave us.
*/
duk_push_hobject(ctx, outer_lex_env); /* -> [ ... closure template env ] */
duk_xdef_prop_stridx(ctx, -3, DUK_STRIDX_INT_LEXENV, DUK_PROPDESC_FLAGS_WC);
/* since closure has NEWENV, never define DUK_STRIDX_INT_VARENV, as it
* will be ignored anyway
*/
/* [ ... closure template ] */
}
} else {
/*
* Function gets no new environment when called. This is the
* case for global code, indirect eval code, and non-strict
* direct eval code. There is no direct correspondence to the
* E5 specification, as global/eval code is not exposed as a
* function.
*/
DUK_ASSERT(!DUK_HOBJECT_HAS_NAMEBINDING(&fun_temp->obj));
duk_push_hobject(ctx, outer_lex_env); /* -> [ ... closure template env ] */
duk_xdef_prop_stridx(ctx, -3, DUK_STRIDX_INT_LEXENV, DUK_PROPDESC_FLAGS_WC);
if (outer_var_env != outer_lex_env) {
duk_push_hobject(ctx, outer_var_env); /* -> [ ... closure template env ] */
duk_xdef_prop_stridx(ctx, -3, DUK_STRIDX_INT_VARENV, DUK_PROPDESC_FLAGS_WC);
}
}
#ifdef DUK_USE_DDDPRINT
duk_get_prop_stridx(ctx, -2, DUK_STRIDX_INT_VARENV);
duk_get_prop_stridx(ctx, -3, DUK_STRIDX_INT_LEXENV);
DUK_DDD(DUK_DDDPRINT("closure varenv -> %!ipT, lexenv -> %!ipT",
(duk_tval *) duk_get_tval(ctx, -2),
(duk_tval *) duk_get_tval(ctx, -1)));
duk_pop_2(ctx);
#endif
/*
* Copy some internal properties directly
*
* The properties will be writable and configurable, but not enumerable.
*/
/* [ ... closure template ] */
DUK_DDD(DUK_DDDPRINT("copying properties: closure=%!iT, template=%!iT",
(duk_tval *) duk_get_tval(ctx, -2),
(duk_tval *) duk_get_tval(ctx, -1)));
for (i = 0; i < (duk_small_uint_t) (sizeof(duk__closure_copy_proplist) / sizeof(duk_uint16_t)); i++) {
duk_small_int_t stridx = (duk_small_int_t) duk__closure_copy_proplist[i];
if (duk_get_prop_stridx(ctx, -1, stridx)) {
/* [ ... closure template val ] */
DUK_DDD(DUK_DDDPRINT("copying property, stridx=%ld -> found", (long) stridx));
duk_xdef_prop_stridx(ctx, -3, stridx, DUK_PROPDESC_FLAGS_WC);
} else {
DUK_DDD(DUK_DDDPRINT("copying property, stridx=%ld -> not found", (long) stridx));
duk_pop(ctx);
}
}
/*
* "length" maps to number of formals (E5 Section 13.2) for function
* declarations/expressions (non-bound functions). Note that 'nargs'
* is NOT necessarily equal to the number of arguments.
*/
/* [ ... closure template ] */
len_value = 0;
/* XXX: use helper for size optimization */
if (duk_get_prop_stridx(ctx, -2, DUK_STRIDX_INT_FORMALS)) {
/* [ ... closure template formals ] */
DUK_ASSERT(duk_has_prop_stridx(ctx, -1, DUK_STRIDX_LENGTH));
DUK_ASSERT(duk_get_length(ctx, -1) <= DUK_UINT_MAX); /* formal arg limits */
len_value = (duk_uint_t) duk_get_length(ctx, -1);
} else {
/* XXX: what to do if _Formals is not empty but compiler has
* optimized it away -- read length from an explicit property
* then?
*/
}
duk_pop(ctx);
duk_push_uint(ctx, len_value); /* [ ... closure template len_value ] */
duk_xdef_prop_stridx(ctx, -3, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_NONE);
/*
* "prototype" is, by default, a fresh object with the "constructor"
* property.
*
* Note that this creates a circular reference for every function
* instance (closure) which prevents refcount-based collection of
* function instances.
*
* XXX: Try to avoid creating the default prototype object, because
* many functions are not used as constructors and the default
* prototype is unnecessary. Perhaps it could be created on-demand
* when it is first accessed?
*/
/* [ ... closure template ] */
if (add_auto_proto) {
duk_push_object(ctx); /* -> [ ... closure template newobj ] */
duk_dup(ctx, -3); /* -> [ ... closure template newobj closure ] */
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_CONSTRUCTOR, DUK_PROPDESC_FLAGS_WC); /* -> [ ... closure template newobj ] */
duk_compact(ctx, -1); /* compact the prototype */
duk_xdef_prop_stridx(ctx, -3, DUK_STRIDX_PROTOTYPE, DUK_PROPDESC_FLAGS_W); /* -> [ ... closure template ] */
}
/*
* "arguments" and "caller" must be mapped to throwers for strict
* mode and bound functions (E5 Section 15.3.5).
*
* XXX: This is expensive to have for every strict function instance.
* Try to implement as virtual properties or on-demand created properties.
*/
/* [ ... closure template ] */
if (DUK_HOBJECT_HAS_STRICT(&fun_clos->obj)) {
duk_xdef_prop_stridx_thrower(ctx, -2, DUK_STRIDX_CALLER, DUK_PROPDESC_FLAGS_NONE);
duk_xdef_prop_stridx_thrower(ctx, -2, DUK_STRIDX_LC_ARGUMENTS, DUK_PROPDESC_FLAGS_NONE);
} else {
#ifdef DUK_USE_NONSTD_FUNC_CALLER_PROPERTY
DUK_DDD(DUK_DDDPRINT("function is non-strict and non-standard 'caller' property in use, add initial 'null' value"));
duk_push_null(ctx);
duk_xdef_prop_stridx(ctx, -3, DUK_STRIDX_CALLER, DUK_PROPDESC_FLAGS_NONE);
#else
DUK_DDD(DUK_DDDPRINT("function is non-strict and non-standard 'caller' property not used"));
#endif
}
/*
* "name" is a non-standard property found in at least V8, Rhino, smjs.
* For Rhino and smjs it is non-writable, non-enumerable, and non-configurable;
* for V8 it is writable, non-enumerable, non-configurable. It is also defined
* for an anonymous function expression in which case the value is an empty string.
* We could also leave name 'undefined' for anonymous functions but that would
* differ from behavior of other engines, so use an empty string.
*
* XXX: make optional? costs something per function.
*/
/* [ ... closure template ] */
if (duk_get_prop_stridx(ctx, -1, DUK_STRIDX_NAME)) {
/* [ ... closure template name ] */
DUK_ASSERT(duk_is_string(ctx, -1));
} else {
/* [ ... closure template undefined ] */
duk_pop(ctx);
duk_push_hstring_stridx(ctx, DUK_STRIDX_EMPTY_STRING);
}
duk_xdef_prop_stridx(ctx, -3, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_NONE); /* -> [ ... closure template ] */
/*
* Compact the closure, in most cases no properties will be added later.
* Also, without this the closures end up having unused property slots
* (e.g. in Duktape 0.9.0, 8 slots would be allocated and only 7 used).
* A better future solution would be to allocate the closure directly
* to correct size (and setup the properties directly without going
* through the API).
*/
duk_compact(ctx, -2);
/*
* Some assertions (E5 Section 13.2).
*/
DUK_ASSERT(DUK_HOBJECT_GET_CLASS_NUMBER(&fun_clos->obj) == DUK_HOBJECT_CLASS_FUNCTION);
DUK_ASSERT(DUK_HOBJECT_GET_PROTOTYPE(thr->heap, &fun_clos->obj) == thr->builtins[DUK_BIDX_FUNCTION_PROTOTYPE]);
DUK_ASSERT(DUK_HOBJECT_HAS_EXTENSIBLE(&fun_clos->obj));
DUK_ASSERT(duk_has_prop_stridx(ctx, -2, DUK_STRIDX_LENGTH) != 0);
DUK_ASSERT(add_auto_proto == 0 || duk_has_prop_stridx(ctx, -2, DUK_STRIDX_PROTOTYPE) != 0);
DUK_ASSERT(duk_has_prop_stridx(ctx, -2, DUK_STRIDX_NAME) != 0); /* non-standard */
DUK_ASSERT(!DUK_HOBJECT_HAS_STRICT(&fun_clos->obj) ||
duk_has_prop_stridx(ctx, -2, DUK_STRIDX_CALLER) != 0);
DUK_ASSERT(!DUK_HOBJECT_HAS_STRICT(&fun_clos->obj) ||
duk_has_prop_stridx(ctx, -2, DUK_STRIDX_LC_ARGUMENTS) != 0);
/*
* Finish
*/
/* [ ... closure template ] */
DUK_DDD(DUK_DDDPRINT("created function instance: template=%!iT -> closure=%!iT",
(duk_tval *) duk_get_tval(ctx, -1),
(duk_tval *) duk_get_tval(ctx, -2)));
duk_pop(ctx);
/* [ ... closure ] */
}
/*
* Delayed activation environment record initialization (for functions
* with NEWENV).
*
* The non-delayed initialization is handled by duk_handle_call().
*/
/* shared helper */
DUK_INTERNAL
duk_hobject *duk_create_activation_environment_record(duk_hthread *thr,
duk_hobject *func,
duk_size_t idx_bottom) {
duk_context *ctx = (duk_context *) thr;
duk_hobject *env;
duk_hobject *parent;
duk_tval *tv;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(func != NULL);
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, func, DUK_HTHREAD_STRING_INT_LEXENV(thr));
if (tv) {
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv));
DUK_ASSERT(DUK_HOBJECT_IS_ENV(DUK_TVAL_GET_OBJECT(tv)));
parent = DUK_TVAL_GET_OBJECT(tv);
} else {
parent = thr->builtins[DUK_BIDX_GLOBAL_ENV];
}
(void) duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE |
DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_DECENV),
-1); /* no prototype, updated below */
env = duk_require_hobject(ctx, -1);
DUK_ASSERT(env != NULL);
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, env, parent); /* parent env is the prototype */
/* open scope information, for compiled functions only */
if (DUK_HOBJECT_IS_COMPILEDFUNCTION(func)) {
duk_push_hthread(ctx, thr);
duk_xdef_prop_stridx_wec(ctx, -2, DUK_STRIDX_INT_THREAD);
duk_push_hobject(ctx, func);
duk_xdef_prop_stridx_wec(ctx, -2, DUK_STRIDX_INT_CALLEE);
duk_push_size_t(ctx, idx_bottom);
duk_xdef_prop_stridx_wec(ctx, -2, DUK_STRIDX_INT_REGBASE);
}
return env;
}
DUK_INTERNAL
void duk_js_init_activation_environment_records_delayed(duk_hthread *thr,
duk_activation *act) {
duk_context *ctx = (duk_context *) thr;
duk_hobject *func;
duk_hobject *env;
func = DUK_ACT_GET_FUNC(act);
DUK_ASSERT(func != NULL);
DUK_ASSERT(!DUK_HOBJECT_HAS_BOUND(func)); /* bound functions are never in act 'func' */
/*
* Delayed initialization only occurs for 'NEWENV' functions.
*/
DUK_ASSERT(DUK_HOBJECT_HAS_NEWENV(func));
DUK_ASSERT(act->lex_env == NULL);
DUK_ASSERT(act->var_env == NULL);
env = duk_create_activation_environment_record(thr, func, act->idx_bottom);
DUK_ASSERT(env != NULL);
DUK_DDD(DUK_DDDPRINT("created delayed fresh env: %!ipO", (duk_heaphdr *) env));
#ifdef DUK_USE_DDDPRINT
{
duk_hobject *p = env;
while (p) {
DUK_DDD(DUK_DDDPRINT(" -> %!ipO", (duk_heaphdr *) p));
p = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, p);
}
}
#endif
act->lex_env = env;
act->var_env = env;
DUK_HOBJECT_INCREF(thr, env); /* XXX: incref by count (here 2 times) */
DUK_HOBJECT_INCREF(thr, env);
duk_pop(ctx);
}
/*
* Closing environment records.
*
* The environment record MUST be closed with the thread where its activation
* is. In other words (if 'env' is open):
*
* - 'thr' must match _env.thread
* - 'func' must match _env.callee
* - 'regbase' must match _env.regbase
*
* These are not looked up from the env to minimize code size.
*
* XXX: should access the own properties directly instead of using the API
*/
DUK_INTERNAL void duk_js_close_environment_record(duk_hthread *thr, duk_hobject *env, duk_hobject *func, duk_size_t regbase) {
duk_context *ctx = (duk_context *) thr;
duk_uint_fast32_t i;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(env != NULL);
/* func is NULL for lightfuncs */
if (!DUK_HOBJECT_IS_DECENV(env) || DUK_HOBJECT_HAS_ENVRECCLOSED(env)) {
DUK_DDD(DUK_DDDPRINT("environment record not a declarative record, "
"or already closed: %!iO",
(duk_heaphdr *) env));
return;
}
DUK_DDD(DUK_DDDPRINT("closing environment record: %!iO, func: %!iO, regbase: %ld",
(duk_heaphdr *) env, (duk_heaphdr *) func, (long) regbase));
duk_push_hobject(ctx, env);
/* assertions: env must be closed in the same thread as where it runs */
#ifdef DUK_USE_ASSERTIONS
{
/* [... env] */
if (duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_CALLEE)) {
DUK_ASSERT(duk_is_object(ctx, -1));
DUK_ASSERT(duk_get_hobject(ctx, -1) == (duk_hobject *) func);
}
duk_pop(ctx);
if (duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_THREAD)) {
DUK_ASSERT(duk_is_object(ctx, -1));
DUK_ASSERT(duk_get_hobject(ctx, -1) == (duk_hobject *) thr);
}
duk_pop(ctx);
if (duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_REGBASE)) {
DUK_ASSERT(duk_is_number(ctx, -1));
DUK_ASSERT(duk_get_number(ctx, -1) == (double) regbase);
}
duk_pop(ctx);
/* [... env] */
}
#endif
if (func != NULL && DUK_HOBJECT_IS_COMPILEDFUNCTION(func)) {
duk_hobject *varmap;
duk_hstring *key;
duk_tval *tv;
duk_uint_t regnum;
/* XXX: additional conditions when to close variables? we don't want to do it
* unless the environment may have "escaped" (referenced in a function closure).
* With delayed environments, the existence is probably good enough of a check.
*/
/* XXX: any way to detect faster whether something needs to be closed?
* We now look up _Callee and then skip the rest.
*/
/* Note: we rely on the _Varmap having a bunch of nice properties, like:
* - being compacted and unmodified during this process
* - not containing an array part
* - having correct value types
*/
/* [... env] */
if (!duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_CALLEE)) {
DUK_DDD(DUK_DDDPRINT("env has no callee property, nothing to close; re-delete the control properties just in case"));
duk_pop(ctx);
goto skip_varmap;
}
/* [... env callee] */
if (!duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_VARMAP)) {
DUK_DDD(DUK_DDDPRINT("callee has no varmap property, nothing to close; delete the control properties"));
duk_pop_2(ctx);
goto skip_varmap;
}
varmap = duk_require_hobject(ctx, -1);
DUK_ASSERT(varmap != NULL);
DUK_DDD(DUK_DDDPRINT("varmap: %!O", (duk_heaphdr *) varmap));
/* [... env callee varmap] */
DUK_DDD(DUK_DDDPRINT("copying bound register values, %ld bound regs", (long) DUK_HOBJECT_GET_ENEXT(varmap)));
for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(varmap); i++) {
key = DUK_HOBJECT_E_GET_KEY(thr->heap, varmap, i);
DUK_ASSERT(key != NULL); /* assume keys are compacted */
DUK_ASSERT(!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, varmap, i)); /* assume plain values */
tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, varmap, i);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv)); /* assume value is a number */
regnum = (duk_uint_t) DUK_TVAL_GET_NUMBER(tv);
DUK_ASSERT_DISABLE(regnum >= 0); /* unsigned */
DUK_ASSERT(regnum < ((duk_hcompiledfunction *) func)->nregs); /* regnum is sane */
DUK_ASSERT(thr->valstack + regbase + regnum >= thr->valstack);
DUK_ASSERT(thr->valstack + regbase + regnum < thr->valstack_top);
/* XXX: slightly awkward */
duk_push_hstring(ctx, key);
duk_push_tval(ctx, thr->valstack + regbase + regnum);
DUK_DDD(DUK_DDDPRINT("closing identifier '%s' -> reg %ld, value %!T",
(const char *) duk_require_string(ctx, -2),
(long) regnum,
(duk_tval *) duk_get_tval(ctx, -1)));
/* [... env callee varmap key val] */
/* if property already exists, overwrites silently */
duk_xdef_prop(ctx, -5, DUK_PROPDESC_FLAGS_WE); /* writable but not deletable */
}
duk_pop_2(ctx);
/* [... env] */
}
skip_varmap:
/* [... env] */
duk_del_prop_stridx(ctx, -1, DUK_STRIDX_INT_CALLEE);
duk_del_prop_stridx(ctx, -1, DUK_STRIDX_INT_THREAD);
duk_del_prop_stridx(ctx, -1, DUK_STRIDX_INT_REGBASE);
duk_pop(ctx);
DUK_HOBJECT_SET_ENVRECCLOSED(env);
DUK_DDD(DUK_DDDPRINT("environment record after being closed: %!O",
(duk_heaphdr *) env));
}
/*
* GETIDREF: a GetIdentifierReference-like helper.
*
* Provides a parent traversing lookup and a single level lookup
* (for HasBinding).
*
* Instead of returning the value, returns a bunch of values allowing
* the caller to read, write, or delete the binding. Value pointers
* are duk_tval pointers which can be mutated directly as long as
* refcounts are properly updated. Note that any operation which may
* reallocate valstacks or compact objects may invalidate the returned
* duk_tval (but not object) pointers, so caller must be very careful.
*
* If starting environment record 'env' is given, 'act' is ignored.
* However, if 'env' is NULL, the caller may identify, in 'act', an
* activation which hasn't had its declarative environment initialized
* yet. The activation registers are then looked up, and its parent
* traversed normally.
*
* The 'out' structure values are only valid if the function returns
* success (non-zero).
*/
/* lookup name from an open declarative record's registers */
DUK_LOCAL
duk_bool_t duk__getid_open_decl_env_regs(duk_hthread *thr,
duk_hstring *name,
duk_hobject *env,
duk__id_lookup_result *out) {
duk_hthread *env_thr;
duk_hobject *env_func;
duk_size_t env_regbase;
duk_hobject *varmap;
duk_tval *tv;
duk_size_t reg_rel;
duk_size_t idx;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(name != NULL);
DUK_ASSERT(env != NULL);
DUK_ASSERT(out != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_DECENV(env));
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, env, DUK_HTHREAD_STRING_INT_CALLEE(thr));
if (!tv) {
/* env is closed, should be missing _Callee, _Thread, _Regbase */
DUK_ASSERT(duk_hobject_find_existing_entry_tval_ptr(thr->heap, env, DUK_HTHREAD_STRING_INT_CALLEE(thr)) == NULL);
DUK_ASSERT(duk_hobject_find_existing_entry_tval_ptr(thr->heap, env, DUK_HTHREAD_STRING_INT_THREAD(thr)) == NULL);
DUK_ASSERT(duk_hobject_find_existing_entry_tval_ptr(thr->heap, env, DUK_HTHREAD_STRING_INT_REGBASE(thr)) == NULL);
return 0;
}
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv));
DUK_ASSERT(DUK_TVAL_GET_OBJECT(tv) != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION(DUK_TVAL_GET_OBJECT(tv)));
env_func = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(env_func != NULL);
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, env_func, DUK_HTHREAD_STRING_INT_VARMAP(thr));
if (!tv) {
return 0;
}
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv));
varmap = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(varmap != NULL);
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, varmap, name);
if (!tv) {
return 0;
}
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
reg_rel = (duk_size_t) DUK_TVAL_GET_NUMBER(tv);
DUK_ASSERT_DISABLE(reg_rel >= 0); /* unsigned */
DUK_ASSERT(reg_rel < ((duk_hcompiledfunction *) env_func)->nregs);
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, env, DUK_HTHREAD_STRING_INT_THREAD(thr));
DUK_ASSERT(tv != NULL);
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv));
DUK_ASSERT(DUK_TVAL_GET_OBJECT(tv) != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_THREAD(DUK_TVAL_GET_OBJECT(tv)));
env_thr = (duk_hthread *) DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(env_thr != NULL);
/* Note: env_thr != thr is quite possible and normal, so careful
* with what thread is used for valstack lookup.
*/
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, env, DUK_HTHREAD_STRING_INT_REGBASE(thr));
DUK_ASSERT(tv != NULL);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
env_regbase = (duk_size_t) DUK_TVAL_GET_NUMBER(tv);
idx = env_regbase + reg_rel;
tv = env_thr->valstack + idx;
DUK_ASSERT(tv >= env_thr->valstack && tv < env_thr->valstack_end); /* XXX: more accurate? */
out->value = tv;
out->attrs = DUK_PROPDESC_FLAGS_W; /* registers are mutable, non-deletable */
out->this_binding = NULL; /* implicit this value always undefined for
* declarative environment records.
*/
out->env = env;
out->holder = NULL;
return 1;
}
/* lookup name from current activation record's functions' registers */
DUK_LOCAL
duk_bool_t duk__getid_activation_regs(duk_hthread *thr,
duk_hstring *name,
duk_activation *act,
duk__id_lookup_result *out) {
duk_tval *tv;
duk_hobject *func;
duk_hobject *varmap;
duk_size_t reg_rel;
duk_size_t idx;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(name != NULL);
DUK_ASSERT(act != NULL);
DUK_ASSERT(out != NULL);
func = DUK_ACT_GET_FUNC(act);
DUK_ASSERT(func != NULL);
DUK_ASSERT(DUK_HOBJECT_HAS_NEWENV(func));
if (!DUK_HOBJECT_IS_COMPILEDFUNCTION(func)) {
return 0;
}
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, func, DUK_HTHREAD_STRING_INT_VARMAP(thr));
if (!tv) {
return 0;
}
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv));
varmap = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(varmap != NULL);
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, varmap, name);
if (!tv) {
return 0;
}
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
reg_rel = (duk_size_t) DUK_TVAL_GET_NUMBER(tv);
DUK_ASSERT_DISABLE(reg_rel >= 0);
DUK_ASSERT(reg_rel < ((duk_hcompiledfunction *) func)->nregs);
idx = act->idx_bottom + reg_rel;
DUK_ASSERT(idx >= act->idx_bottom);
tv = thr->valstack + idx;
out->value = tv;
out->attrs = DUK_PROPDESC_FLAGS_W; /* registers are mutable, non-deletable */
out->this_binding = NULL; /* implicit this value always undefined for
* declarative environment records.
*/
out->env = NULL;
out->holder = NULL;
return 1;
}
DUK_LOCAL
duk_bool_t duk__get_identifier_reference(duk_hthread *thr,
duk_hobject *env,
duk_hstring *name,
duk_activation *act,
duk_bool_t parents,
duk__id_lookup_result *out) {
duk_tval *tv;
duk_tval *tv_target;
duk_tval tv_name;
duk_uint_t sanity;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(env != NULL || act != NULL);
DUK_ASSERT(name != NULL);
DUK_ASSERT(out != NULL);
DUK_ASSERT(!env || DUK_HOBJECT_IS_ENV(env));
DUK_ASSERT(!env || !DUK_HOBJECT_HAS_ARRAY_PART(env));
/*
* Conceptually, we look for the identifier binding by starting from
* 'env' and following to chain of environment records (represented
* by the prototype chain).
*
* If 'env' is NULL, the current activation does not yet have an
* allocated declarative environment record; this should be treated
* exactly as if the environment record existed but had no bindings
* other than register bindings.
*
* Note: we assume that with the DUK_HOBJECT_FLAG_NEWENV cleared
* the environment will always be initialized immediately; hence
* a NULL 'env' should only happen with the flag set. This is the
* case for: (1) function calls, and (2) strict, direct eval calls.
*/
if (env == NULL && act != NULL) {
duk_hobject *func;
DUK_DDD(DUK_DDDPRINT("duk__get_identifier_reference: env is NULL, activation is non-NULL -> "
"delayed env case, look up activation regs first"));
/*
* Try registers
*/
if (duk__getid_activation_regs(thr, name, act, out)) {
DUK_DDD(DUK_DDDPRINT("duk__get_identifier_reference successful: "
"name=%!O -> value=%!T, attrs=%ld, this=%!T, env=%!O, holder=%!O "
"(found from register bindings when env=NULL)",
(duk_heaphdr *) name, (duk_tval *) out->value,
(long) out->attrs, (duk_tval *) out->this_binding,
(duk_heaphdr *) out->env, (duk_heaphdr *) out->holder));
return 1;
}
DUK_DDD(DUK_DDDPRINT("not found in current activation regs"));
/*
* Not found in registers, proceed to the parent record.
* Here we need to determine what the parent would be,
* if 'env' was not NULL (i.e. same logic as when initializing
* the record).
*
* Note that environment initialization is only deferred when
* DUK_HOBJECT_HAS_NEWENV is set, and this only happens for:
* - Function code
* - Strict eval code
*
* We only need to check _Lexenv here; _Varenv exists only if it
* differs from _Lexenv (and thus _Lexenv will also be present).
*/
if (!parents) {
DUK_DDD(DUK_DDDPRINT("duk__get_identifier_reference failed, no parent traversal "
"(not found from register bindings when env=NULL)"));
goto fail_not_found;
}
func = DUK_ACT_GET_FUNC(act);
DUK_ASSERT(func != NULL);
DUK_ASSERT(DUK_HOBJECT_HAS_NEWENV(func));
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, func, DUK_HTHREAD_STRING_INT_LEXENV(thr));
if (tv) {
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv));
env = DUK_TVAL_GET_OBJECT(tv);
} else {
DUK_ASSERT(duk_hobject_find_existing_entry_tval_ptr(thr->heap, func, DUK_HTHREAD_STRING_INT_VARENV(thr)) == NULL);
env = thr->builtins[DUK_BIDX_GLOBAL_ENV];
}
DUK_DDD(DUK_DDDPRINT("continue lookup from env: %!iO",
(duk_heaphdr *) env));
}
/*
* Prototype walking starting from 'env'.
*
* ('act' is not needed anywhere here.)
*/
sanity = DUK_HOBJECT_PROTOTYPE_CHAIN_SANITY;
while (env != NULL) {
duk_small_int_t cl;
duk_int_t attrs;
DUK_DDD(DUK_DDDPRINT("duk__get_identifier_reference, name=%!O, considering env=%p -> %!iO",
(duk_heaphdr *) name,
(void *) env,
(duk_heaphdr *) env));
DUK_ASSERT(env != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_ENV(env));
DUK_ASSERT(!DUK_HOBJECT_HAS_ARRAY_PART(env));
cl = DUK_HOBJECT_GET_CLASS_NUMBER(env);
DUK_ASSERT(cl == DUK_HOBJECT_CLASS_OBJENV || cl == DUK_HOBJECT_CLASS_DECENV);
if (cl == DUK_HOBJECT_CLASS_DECENV) {
/*
* Declarative environment record.
*
* Identifiers can never be stored in ancestors and are
* always plain values, so we can use an internal helper
* and access the value directly with an duk_tval ptr.
*
* A closed environment is only indicated by it missing
* the "book-keeping" properties required for accessing
* register-bound variables.
*/
if (DUK_HOBJECT_HAS_ENVRECCLOSED(env)) {
/* already closed */
goto skip_regs;
}
if (duk__getid_open_decl_env_regs(thr, name, env, out)) {
DUK_DDD(DUK_DDDPRINT("duk__get_identifier_reference successful: "
"name=%!O -> value=%!T, attrs=%ld, this=%!T, env=%!O, holder=%!O "
"(declarative environment record, scope open, found in regs)",
(duk_heaphdr *) name, (duk_tval *) out->value,
(long) out->attrs, (duk_tval *) out->this_binding,
(duk_heaphdr *) out->env, (duk_heaphdr *) out->holder));
return 1;
}
skip_regs:
tv = duk_hobject_find_existing_entry_tval_ptr_and_attrs(thr->heap, env, name, &attrs);
if (tv) {
out->value = tv;
out->attrs = attrs;
out->this_binding = NULL; /* implicit this value always undefined for
* declarative environment records.
*/
out->env = env;
out->holder = env;
DUK_DDD(DUK_DDDPRINT("duk__get_identifier_reference successful: "
"name=%!O -> value=%!T, attrs=%ld, this=%!T, env=%!O, holder=%!O "
"(declarative environment record, found in properties)",
(duk_heaphdr *) name, (duk_tval *) out->value,
(long) out->attrs, (duk_tval *) out->this_binding,
(duk_heaphdr *) out->env, (duk_heaphdr *) out->holder));
return 1;
}
} else {
/*
* Object environment record.
*
* Binding (target) object is an external, uncontrolled object.
* Identifier may be bound in an ancestor property, and may be
* an accessor. Target can also be a Proxy which we must support
* here.
*/
/* XXX: we could save space by using _Target OR _This. If _Target, assume
* this binding is undefined. If _This, assumes this binding is _This, and
* target is also _This. One property would then be enough.
*/
duk_hobject *target;
duk_bool_t found;
DUK_ASSERT(cl == DUK_HOBJECT_CLASS_OBJENV);
tv_target = duk_hobject_find_existing_entry_tval_ptr(thr->heap, env, DUK_HTHREAD_STRING_INT_TARGET(thr));
DUK_ASSERT(tv_target != NULL);
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv_target));
target = DUK_TVAL_GET_OBJECT(tv_target);
DUK_ASSERT(target != NULL);
/* Target may be a Proxy or property may be an accessor, so we must
* use an actual, Proxy-aware hasprop check here.
*
* out->holder is NOT set to the actual duk_hobject where the
* property is found, but rather the object binding target object.
*/
if (DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(target)) {
DUK_ASSERT(name != NULL);
DUK_TVAL_SET_STRING(&tv_name, name);
found = duk_hobject_hasprop(thr, tv_target, &tv_name);
} else {
/* XXX: duk_hobject_hasprop() would be correct for
* non-Proxy objects too, but it is about ~20-25%
* slower at present so separate code paths for
* Proxy and non-Proxy now.
*/
found = duk_hobject_hasprop_raw(thr, target, name);
}
if (found) {
out->value = NULL; /* can't get value, may be accessor */
out->attrs = 0; /* irrelevant when out->value == NULL */
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, env, DUK_HTHREAD_STRING_INT_THIS(thr));
out->this_binding = tv; /* may be NULL */
out->env = env;
out->holder = target;
DUK_DDD(DUK_DDDPRINT("duk__get_identifier_reference successful: "
"name=%!O -> value=%!T, attrs=%ld, this=%!T, env=%!O, holder=%!O "
"(object environment record)",
(duk_heaphdr *) name, (duk_tval *) out->value,
(long) out->attrs, (duk_tval *) out->this_binding,
(duk_heaphdr *) out->env, (duk_heaphdr *) out->holder));
return 1;
}
}
if (!parents) {
DUK_DDD(DUK_DDDPRINT("duk__get_identifier_reference failed, no parent traversal "
"(not found from first traversed env)"));
goto fail_not_found;
}
if (sanity-- == 0) {
DUK_ERROR_RANGE(thr, DUK_STR_PROTOTYPE_CHAIN_LIMIT);
}
env = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, env);
};
/*
* Not found (even in global object)
*/
fail_not_found:
return 0;
}
/*
* HASVAR: check identifier binding from a given environment record
* without traversing its parents.
*
* This primitive is not exposed to user code as such, but is used
* internally for e.g. declaration binding instantiation.
*
* See E5 Sections:
* 10.2.1.1.1 HasBinding(N)
* 10.2.1.2.1 HasBinding(N)
*
* Note: strictness has no bearing on this check. Hence we don't take
* a 'strict' parameter.
*/
#if 0 /*unused*/
DUK_INTERNAL
duk_bool_t duk_js_hasvar_envrec(duk_hthread *thr,
duk_hobject *env,
duk_hstring *name) {
duk__id_lookup_result ref;
duk_bool_t parents;
DUK_DDD(DUK_DDDPRINT("hasvar: thr=%p, env=%p, name=%!O "
"(env -> %!dO)",
(void *) thr, (void *) env, (duk_heaphdr *) name,
(duk_heaphdr *) env));
DUK_ASSERT(thr != NULL);
DUK_ASSERT(env != NULL);
DUK_ASSERT(name != NULL);
DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR(env);
DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR(name);
DUK_ASSERT(DUK_HOBJECT_IS_ENV(env));
DUK_ASSERT(!DUK_HOBJECT_HAS_ARRAY_PART(env));
/* lookup results is ignored */
parents = 0;
return duk__get_identifier_reference(thr, env, name, NULL, parents, &ref);
}
#endif
/*
* GETVAR
*
* See E5 Sections:
* 11.1.2 Identifier Reference
* 10.3.1 Identifier Resolution
* 11.13.1 Simple Assignment [example of where the Reference is GetValue'd]
* 8.7.1 GetValue (V)
* 8.12.1 [[GetOwnProperty]] (P)
* 8.12.2 [[GetProperty]] (P)
* 8.12.3 [[Get]] (P)
*
* If 'throw' is true, always leaves two values on top of stack: [val this].
*
* If 'throw' is false, returns 0 if identifier cannot be resolved, and the
* stack will be unaffected in this case. If identifier is resolved, returns
* 1 and leaves [val this] on top of stack.
*
* Note: the 'strict' flag of a reference returned by GetIdentifierReference
* is ignored by GetValue. Hence we don't take a 'strict' parameter.
*
* The 'throw' flag is needed for implementing 'typeof' for an unreferenced
* identifier. An unreference identifier in other contexts generates a
* ReferenceError.
*/
DUK_LOCAL
duk_bool_t duk__getvar_helper(duk_hthread *thr,
duk_hobject *env,
duk_activation *act,
duk_hstring *name,
duk_bool_t throw_flag) {
duk_context *ctx = (duk_context *) thr;
duk__id_lookup_result ref;
duk_tval tv_tmp_obj;
duk_tval tv_tmp_key;
duk_bool_t parents;
DUK_DDD(DUK_DDDPRINT("getvar: thr=%p, env=%p, act=%p, name=%!O "
"(env -> %!dO)",
(void *) thr, (void *) env, (void *) act,
(duk_heaphdr *) name, (duk_heaphdr *) env));
DUK_ASSERT(thr != NULL);
DUK_ASSERT(name != NULL);
/* env and act may be NULL */
DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR(env);
DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR(name);
parents = 1; /* follow parent chain */
if (duk__get_identifier_reference(thr, env, name, act, parents, &ref)) {
if (ref.value) {
DUK_ASSERT(ref.this_binding == NULL); /* always for register bindings */
duk_push_tval(ctx, ref.value);
duk_push_undefined(ctx);
} else {
DUK_ASSERT(ref.holder != NULL);
/* Note: getprop may invoke any getter and invalidate any
* duk_tval pointers, so this must be done first.
*/
if (ref.this_binding) {
duk_push_tval(ctx, ref.this_binding);
} else {
duk_push_undefined(ctx);
}
DUK_TVAL_SET_OBJECT(&tv_tmp_obj, ref.holder);
DUK_TVAL_SET_STRING(&tv_tmp_key, name);
(void) duk_hobject_getprop(thr, &tv_tmp_obj, &tv_tmp_key); /* [this value] */
/* ref.value, ref.this.binding invalidated here by getprop call */
duk_insert(ctx, -2); /* [this value] -> [value this] */
}
return 1;
} else {
if (throw_flag) {
DUK_ERROR_FMT1(thr, DUK_ERR_REFERENCE_ERROR,
"identifier '%s' undefined",
(const char *) DUK_HSTRING_GET_DATA(name));
}
return 0;
}
}
DUK_INTERNAL
duk_bool_t duk_js_getvar_envrec(duk_hthread *thr,
duk_hobject *env,
duk_hstring *name,
duk_bool_t throw_flag) {
return duk__getvar_helper(thr, env, NULL, name, throw_flag);
}
DUK_INTERNAL
duk_bool_t duk_js_getvar_activation(duk_hthread *thr,
duk_activation *act,
duk_hstring *name,
duk_bool_t throw_flag) {
DUK_ASSERT(act != NULL);
return duk__getvar_helper(thr, act->lex_env, act, name, throw_flag);
}
/*
* PUTVAR
*
* See E5 Sections:
* 11.1.2 Identifier Reference
* 10.3.1 Identifier Resolution
* 11.13.1 Simple Assignment [example of where the Reference is PutValue'd]
* 8.7.2 PutValue (V,W) [see especially step 3.b, undefined -> automatic global in non-strict mode]
* 8.12.4 [[CanPut]] (P)
* 8.12.5 [[Put]] (P)
*
* Note: may invalidate any valstack (or object) duk_tval pointers because
* putting a value may reallocate any object or any valstack. Caller beware.
*/
DUK_LOCAL
void duk__putvar_helper(duk_hthread *thr,
duk_hobject *env,
duk_activation *act,
duk_hstring *name,
duk_tval *val,
duk_bool_t strict) {
duk__id_lookup_result ref;
duk_tval tv_tmp_obj;
duk_tval tv_tmp_key;
duk_bool_t parents;
DUK_DDD(DUK_DDDPRINT("putvar: thr=%p, env=%p, act=%p, name=%!O, val=%p, strict=%ld "
"(env -> %!dO, val -> %!T)",
(void *) thr, (void *) env, (void *) act,
(duk_heaphdr *) name, (void *) val, (long) strict,
(duk_heaphdr *) env, (duk_tval *) val));
DUK_ASSERT(thr != NULL);
DUK_ASSERT(name != NULL);
DUK_ASSERT(val != NULL);
/* env and act may be NULL */
DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR(env);
DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR(name);
DUK_ASSERT_REFCOUNT_NONZERO_TVAL(val);
/*
* In strict mode E5 protects 'eval' and 'arguments' from being
* assigned to (or even declared anywhere). Attempt to do so
* should result in a compile time SyntaxError. See the internal
* design documentation for details.
*
* Thus, we should never come here, run-time, for strict code,
* and name 'eval' or 'arguments'.
*/
DUK_ASSERT(!strict ||
(name != DUK_HTHREAD_STRING_EVAL(thr) &&
name != DUK_HTHREAD_STRING_LC_ARGUMENTS(thr)));
/*
* Lookup variable and update in-place if found.
*/
parents = 1; /* follow parent chain */
if (duk__get_identifier_reference(thr, env, name, act, parents, &ref)) {
if (ref.value && (ref.attrs & DUK_PROPDESC_FLAG_WRITABLE)) {
/* Update duk_tval in-place if pointer provided and the
* property is writable. If the property is not writable
* (immutable binding), use duk_hobject_putprop() which
* will respect mutability.
*/
duk_tval *tv_val;
DUK_ASSERT(ref.this_binding == NULL); /* always for register bindings */
tv_val = ref.value;
DUK_ASSERT(tv_val != NULL);
DUK_TVAL_SET_TVAL_UPDREF(thr, tv_val, val); /* side effects */
/* ref.value and ref.this_binding invalidated here */
} else {
DUK_ASSERT(ref.holder != NULL);
DUK_TVAL_SET_OBJECT(&tv_tmp_obj, ref.holder);
DUK_TVAL_SET_STRING(&tv_tmp_key, name);
(void) duk_hobject_putprop(thr, &tv_tmp_obj, &tv_tmp_key, val, strict);
/* ref.value and ref.this_binding invalidated here */
}
return;
}
/*
* Not found: write to global object (non-strict) or ReferenceError
* (strict); see E5 Section 8.7.2, step 3.
*/
if (strict) {
DUK_DDD(DUK_DDDPRINT("identifier binding not found, strict => reference error"));
DUK_ERROR(thr, DUK_ERR_REFERENCE_ERROR, "identifier not defined");
}
DUK_DDD(DUK_DDDPRINT("identifier binding not found, not strict => set to global"));
DUK_TVAL_SET_OBJECT(&tv_tmp_obj, thr->builtins[DUK_BIDX_GLOBAL]);
DUK_TVAL_SET_STRING(&tv_tmp_key, name);
(void) duk_hobject_putprop(thr, &tv_tmp_obj, &tv_tmp_key, val, 0); /* 0 = no throw */
/* NB: 'val' may be invalidated here because put_value may realloc valstack,
* caller beware.
*/
}
DUK_INTERNAL
void duk_js_putvar_envrec(duk_hthread *thr,
duk_hobject *env,
duk_hstring *name,
duk_tval *val,
duk_bool_t strict) {
duk__putvar_helper(thr, env, NULL, name, val, strict);
}
DUK_INTERNAL
void duk_js_putvar_activation(duk_hthread *thr,
duk_activation *act,
duk_hstring *name,
duk_tval *val,
duk_bool_t strict) {
DUK_ASSERT(act != NULL);
duk__putvar_helper(thr, act->lex_env, act, name, val, strict);
}
/*
* DELVAR
*
* See E5 Sections:
* 11.4.1 The delete operator
* 10.2.1.1.5 DeleteBinding (N) [declarative environment record]
* 10.2.1.2.5 DeleteBinding (N) [object environment record]
*
* Variable bindings established inside eval() are deletable (configurable),
* other bindings are not, including variables declared in global level.
* Registers are always non-deletable, and the deletion of other bindings
* is controlled by the configurable flag.
*
* For strict mode code, the 'delete' operator should fail with a compile
* time SyntaxError if applied to identifiers. Hence, no strict mode
* run-time deletion of identifiers should ever happen. This function
* should never be called from strict mode code!
*/
DUK_LOCAL
duk_bool_t duk__delvar_helper(duk_hthread *thr,
duk_hobject *env,
duk_activation *act,
duk_hstring *name) {
duk__id_lookup_result ref;
duk_bool_t parents;
DUK_DDD(DUK_DDDPRINT("delvar: thr=%p, env=%p, act=%p, name=%!O "
"(env -> %!dO)",
(void *) thr, (void *) env, (void *) act,
(duk_heaphdr *) name, (duk_heaphdr *) env));
DUK_ASSERT(thr != NULL);
DUK_ASSERT(name != NULL);
/* env and act may be NULL */
DUK_ASSERT_REFCOUNT_NONZERO_HEAPHDR(name);
parents = 1; /* follow parent chain */
if (duk__get_identifier_reference(thr, env, name, act, parents, &ref)) {
if (ref.value && !(ref.attrs & DUK_PROPDESC_FLAG_CONFIGURABLE)) {
/* Identifier found in registers (always non-deletable)
* or declarative environment record and non-configurable.
*/
return 0;
}
DUK_ASSERT(ref.holder != NULL);
return duk_hobject_delprop_raw(thr, ref.holder, name, 0);
}
/*
* Not found (even in global object).
*
* In non-strict mode this is a silent SUCCESS (!), see E5 Section 11.4.1,
* step 3.b. In strict mode this case is a compile time SyntaxError so
* we should not come here.
*/
DUK_DDD(DUK_DDDPRINT("identifier to be deleted not found: name=%!O "
"(treated as silent success)",
(duk_heaphdr *) name));
return 1;
}
#if 0 /*unused*/
DUK_INTERNAL
duk_bool_t duk_js_delvar_envrec(duk_hthread *thr,
duk_hobject *env,
duk_hstring *name) {
return duk__delvar_helper(thr, env, NULL, name);
}
#endif
DUK_INTERNAL
duk_bool_t duk_js_delvar_activation(duk_hthread *thr,
duk_activation *act,
duk_hstring *name) {
DUK_ASSERT(act != NULL);
return duk__delvar_helper(thr, act->lex_env, act, name);
}
/*
* DECLVAR
*
* See E5 Sections:
* 10.4.3 Entering Function Code
* 10.5 Declaration Binding Instantion
* 12.2 Variable Statement
* 11.1.2 Identifier Reference
* 10.3.1 Identifier Resolution
*
* Variable declaration behavior is mainly discussed in Section 10.5,
* and is not discussed in the execution semantics (Sections 11-13).
*
* Conceptually declarations happen when code (global, eval, function)
* is entered, before any user code is executed. In practice, register-
* bound identifiers are 'declared' automatically (by virtue of being
* allocated to registers with the initial value 'undefined'). Other
* identifiers are declared in the function prologue with this primitive.
*
* Since non-register bindings eventually back to an internal object's
* properties, the 'prop_flags' argument is used to specify binding
* type:
*
* - Immutable binding: set DUK_PROPDESC_FLAG_WRITABLE to false
* - Non-deletable binding: set DUK_PROPDESC_FLAG_CONFIGURABLE to false
* - The flag DUK_PROPDESC_FLAG_ENUMERABLE should be set, although it
* doesn't really matter for internal objects
*
* All bindings are non-deletable mutable bindings except:
*
* - Declarations in eval code (mutable, deletable)
* - 'arguments' binding in strict function code (immutable)
* - Function name binding of a function expression (immutable)
*
* Declarations may go to declarative environment records (always
* so for functions), but may also go to object environment records
* (e.g. global code). The global object environment has special
* behavior when re-declaring a function (but not a variable); see
* E5.1 specification, Section 10.5, step 5.e.
*
* Declarations always go to the 'top-most' environment record, i.e.
* we never check the record chain. It's not an error even if a
* property (even an immutable or non-deletable one) of the same name
* already exists.
*
* If a declared variable already exists, its value needs to be updated
* (if possible). Returns 1 if a PUTVAR needs to be done by the caller;
* otherwise returns 0.
*/
DUK_LOCAL
duk_bool_t duk__declvar_helper(duk_hthread *thr,
duk_hobject *env,
duk_hstring *name,
duk_tval *val,
duk_small_int_t prop_flags,
duk_bool_t is_func_decl) {
duk_context *ctx = (duk_context *) thr;
duk_hobject *holder;
duk_bool_t parents;
duk__id_lookup_result ref;
duk_tval *tv;
DUK_DDD(DUK_DDDPRINT("declvar: thr=%p, env=%p, name=%!O, val=%!T, prop_flags=0x%08lx, is_func_decl=%ld "
"(env -> %!iO)",
(void *) thr, (void *) env, (duk_heaphdr *) name,
(duk_tval *) val, (unsigned long) prop_flags,
(unsigned int) is_func_decl, (duk_heaphdr *) env));
DUK_ASSERT(thr != NULL);
DUK_ASSERT(env != NULL);
DUK_ASSERT(name != NULL);
DUK_ASSERT(val != NULL);
/* Note: in strict mode the compiler should reject explicit
* declaration of 'eval' or 'arguments'. However, internal
* bytecode may declare 'arguments' in the function prologue.
* We don't bother checking (or asserting) for these now.
*/
/* Note: val is a stable duk_tval pointer. The caller makes
* a value copy into its stack frame, so 'tv_val' is not subject
* to side effects here.
*/
/*
* Check whether already declared.
*
* We need to check whether the binding exists in the environment
* without walking its parents. However, we still need to check
* register-bound identifiers and the prototype chain of an object
* environment target object.
*/
parents = 0; /* just check 'env' */
if (duk__get_identifier_reference(thr, env, name, NULL, parents, &ref)) {
duk_int_t e_idx;
duk_int_t h_idx;
duk_small_int_t flags;
/*
* Variable already declared, ignore re-declaration.
* The only exception is the updated behavior of E5.1 for
* global function declarations, E5.1 Section 10.5, step 5.e.
* This behavior does not apply to global variable declarations.
*/
if (!(is_func_decl && env == thr->builtins[DUK_BIDX_GLOBAL_ENV])) {
DUK_DDD(DUK_DDDPRINT("re-declare a binding, ignoring"));
return 1; /* 1 -> needs a PUTVAR */
}
/*
* Special behavior in E5.1.
*
* Note that even though parents == 0, the conflicting property
* may be an inherited property (currently our global object's
* prototype is Object.prototype). Step 5.e first operates on
* the existing property (which is potentially in an ancestor)
* and then defines a new property in the global object (and
* never modifies the ancestor).
*
* Also note that this logic would become even more complicated
* if the conflicting property might be a virtual one. Object
* prototype has no virtual properties, though.
*
* XXX: this is now very awkward, rework.
*/
DUK_DDD(DUK_DDDPRINT("re-declare a function binding in global object, "
"updated E5.1 processing"));
DUK_ASSERT(ref.holder != NULL);
holder = ref.holder;
/* holder will be set to the target object, not the actual object
* where the property was found (see duk__get_identifier_reference()).
*/
DUK_ASSERT(DUK_HOBJECT_GET_CLASS_NUMBER(holder) == DUK_HOBJECT_CLASS_GLOBAL);
DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARRAY(holder)); /* global object doesn't have array part */
/* XXX: use a helper for prototype traversal; no loop check here */
/* must be found: was found earlier, and cannot be inherited */
for (;;) {
DUK_ASSERT(holder != NULL);
duk_hobject_find_existing_entry(thr->heap, holder, name, &e_idx, &h_idx);
if (e_idx >= 0) {
break;
}
/* SCANBUILD: NULL pointer dereference, doesn't actually trigger,
* asserted above.
*/
holder = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, holder);
}
DUK_ASSERT(holder != NULL);
DUK_ASSERT(e_idx >= 0);
/* SCANBUILD: scan-build produces a NULL pointer dereference warning
* below; it never actually triggers because holder is actually never
* NULL.
*/
/* ref.holder is global object, holder is the object with the
* conflicting property.
*/
flags = DUK_HOBJECT_E_GET_FLAGS(thr->heap, holder, e_idx);
if (!(flags & DUK_PROPDESC_FLAG_CONFIGURABLE)) {
if (flags & DUK_PROPDESC_FLAG_ACCESSOR) {
DUK_DDD(DUK_DDDPRINT("existing property is a non-configurable "
"accessor -> reject"));
goto fail_existing_attributes;
}
if (!((flags & DUK_PROPDESC_FLAG_WRITABLE) &&
(flags & DUK_PROPDESC_FLAG_ENUMERABLE))) {
DUK_DDD(DUK_DDDPRINT("existing property is a non-configurable "
"plain property which is not writable and "
"enumerable -> reject"));
goto fail_existing_attributes;
}
DUK_DDD(DUK_DDDPRINT("existing property is not configurable but "
"is plain, enumerable, and writable -> "
"allow redeclaration"));
}
if (holder == ref.holder) {
/* XXX: if duk_hobject_define_property_internal() was updated
* to handle a pre-existing accessor property, this would be
* a simple call (like for the ancestor case).
*/
DUK_DDD(DUK_DDDPRINT("redefine, offending property in global object itself"));
if (flags & DUK_PROPDESC_FLAG_ACCESSOR) {
duk_hobject *tmp;
tmp = DUK_HOBJECT_E_GET_VALUE_GETTER(thr->heap, holder, e_idx);
DUK_HOBJECT_E_SET_VALUE_GETTER(thr->heap, holder, e_idx, NULL);
DUK_HOBJECT_DECREF_ALLOWNULL(thr, tmp);
DUK_UNREF(tmp);
tmp = DUK_HOBJECT_E_GET_VALUE_SETTER(thr->heap, holder, e_idx);
DUK_HOBJECT_E_SET_VALUE_SETTER(thr->heap, holder, e_idx, NULL);
DUK_HOBJECT_DECREF_ALLOWNULL(thr, tmp);
DUK_UNREF(tmp);
} else {
tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, holder, e_idx);
DUK_TVAL_SET_UNDEFINED_UPDREF(thr, tv);
}
/* Here val would be potentially invalid if we didn't make
* a value copy at the caller.
*/
tv = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, holder, e_idx);
DUK_TVAL_SET_TVAL(tv, val);
DUK_TVAL_INCREF(thr, tv);
DUK_HOBJECT_E_SET_FLAGS(thr->heap, holder, e_idx, prop_flags);
DUK_DDD(DUK_DDDPRINT("updated global binding, final result: "
"value -> %!T, prop_flags=0x%08lx",
(duk_tval *) DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, holder, e_idx),
(unsigned long) prop_flags));
} else {
DUK_DDD(DUK_DDDPRINT("redefine, offending property in ancestor"));
DUK_ASSERT(ref.holder == thr->builtins[DUK_BIDX_GLOBAL]);
duk_push_tval(ctx, val);
duk_hobject_define_property_internal(thr, ref.holder, name, prop_flags);
}
return 0;
}
/*
* Not found (in registers or record objects). Declare
* to current variable environment.
*/
/*
* Get holder object
*/
if (DUK_HOBJECT_IS_DECENV(env)) {
holder = env;
} else {
DUK_ASSERT(DUK_HOBJECT_IS_OBJENV(env));
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, env, DUK_HTHREAD_STRING_INT_TARGET(thr));
DUK_ASSERT(tv != NULL);
DUK_ASSERT(DUK_TVAL_IS_OBJECT(tv));
holder = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(holder != NULL);
}
/*
* Define new property
*
* Note: this may fail if the holder is not extensible.
*/
/* XXX: this is awkward as we use an internal method which doesn't handle
* extensibility etc correctly. Basically we'd want to do a [[DefineOwnProperty]]
* or Object.defineProperty() here.
*/
if (!DUK_HOBJECT_HAS_EXTENSIBLE(holder)) {
goto fail_not_extensible;
}
duk_push_hobject(ctx, holder);
duk_push_hstring(ctx, name);
duk_push_tval(ctx, val);
duk_xdef_prop(ctx, -3, prop_flags); /* [holder name val] -> [holder] */
duk_pop(ctx);
return 0;
fail_existing_attributes:
fail_not_extensible:
DUK_ERROR_TYPE(thr, "declaration failed");
return 0;
}
DUK_INTERNAL
duk_bool_t duk_js_declvar_activation(duk_hthread *thr,
duk_activation *act,
duk_hstring *name,
duk_tval *val,
duk_small_int_t prop_flags,
duk_bool_t is_func_decl) {
duk_hobject *env;
duk_tval tv_val_copy;
/*
* Make a value copy of the input val. This ensures that
* side effects cannot invalidate the pointer.
*/
DUK_TVAL_SET_TVAL(&tv_val_copy, val);
val = &tv_val_copy;
/*
* Delayed env creation check
*/
if (!act->var_env) {
DUK_ASSERT(act->lex_env == NULL);
duk_js_init_activation_environment_records_delayed(thr, act);
}
DUK_ASSERT(act->lex_env != NULL);
DUK_ASSERT(act->var_env != NULL);
env = act->var_env;
DUK_ASSERT(env != NULL);
DUK_ASSERT(DUK_HOBJECT_IS_ENV(env));
return duk__declvar_helper(thr, env, name, val, prop_flags, is_func_decl);
}
#line 1 "duk_lexer.c"
/*
* Lexer for source files, ToNumber() string conversions, RegExp expressions,
* and JSON.
*
* Provides a stream of Ecmascript tokens from an UTF-8/CESU-8 buffer. The
* caller can also rewind the token stream into a certain position which is
* needed by the compiler part for multi-pass scanning. Tokens are
* represented as duk_token structures, and contain line number information.
* Token types are identified with DUK_TOK_* defines.
*
* Characters are decoded into a fixed size lookup window consisting of
* decoded Unicode code points, with window positions past the end of the
* input filled with an invalid codepoint (-1). The tokenizer can thus
* perform multiple character lookups efficiently and with few sanity
* checks (such as access outside the end of the input), which keeps the
* tokenization code small at the cost of performance.
*
* Character data in tokens, such as identifier names and string literals,
* is encoded into CESU-8 format on-the-fly while parsing the token in
* question. The string data is made reachable to garbage collection by
* placing the token-related values in value stack entries allocated for
* this purpose by the caller. The characters exist in Unicode code point
* form only in the fixed size lookup window, which keeps character data
* expansion (of especially ASCII data) low.
*
* Token parsing supports the full range of Unicode characters as described
* in the E5 specification. Parsing has been optimized for ASCII characters
* because ordinary Ecmascript code consists almost entirely of ASCII
* characters. Matching of complex Unicode codepoint sets (such as in the
* IdentifierStart and IdentifierPart productions) is optimized for size,
* and is done using a linear scan of a bit-packed list of ranges. This is
* very slow, but should never be entered unless the source code actually
* contains Unicode characters.
*
* Ecmascript tokenization is partially context sensitive. First,
* additional future reserved words are recognized in strict mode (see E5
* Section 7.6.1.2). Second, a forward slash character ('/') can be
* recognized either as starting a RegExp literal or as a division operator,
* depending on context. The caller must provide necessary context flags
* when requesting a new token.
*
* Future work:
*
* * Make line number tracking optional, as it consumes space.
*
* * Add a feature flag for disabling UTF-8 decoding of input, as most
* source code is ASCII. Because of Unicode escapes written in ASCII,
* this does not allow Unicode support to be removed from e.g.
* duk_unicode_is_identifier_start() nor does it allow removal of CESU-8
* encoding of e.g. string literals.
*
* * Add a feature flag for disabling Unicode compliance of e.g. identifier
* names. This allows for a build more than a kilobyte smaller, because
* Unicode ranges needed by duk_unicode_is_identifier_start() and
* duk_unicode_is_identifier_part() can be dropped. String literals
* should still be allowed to contain escaped Unicode, so this still does
* not allow removal of CESU-8 encoding of e.g. string literals.
*
* * Character lookup tables for codepoints above BMP could be stripped.
*
* * Strictly speaking, E5 specification requires that source code consists
* of 16-bit code units, and if not, must be conceptually converted to
* that format first. The current lexer processes Unicode code points
* and allows characters outside the BMP. These should be converted to
* surrogate pairs while reading the source characters into the window,
* not after tokens have been formed (as is done now). However, the fix
* is not trivial because two characters are decoded from one codepoint.
*
* * Optimize for speed as well as size. Large if-else ladders are (at
* least potentially) slow.
*/
/* include removed: duk_internal.h */
/*
* Various defines and file specific helper macros
*/
#define DUK__MAX_RE_DECESC_DIGITS 9
#define DUK__MAX_RE_QUANT_DIGITS 9 /* Does not allow e.g. 2**31-1, but one more would allow overflows of u32. */
/* whether to use macros or helper function depends on call count */
#define DUK__ISDIGIT(x) ((x) >= DUK_ASC_0 && (x) <= DUK_ASC_9)
#define DUK__ISHEXDIGIT(x) duk__is_hex_digit((x))
#define DUK__ISOCTDIGIT(x) ((x) >= DUK_ASC_0 && (x) <= DUK_ASC_7)
#define DUK__ISDIGIT03(x) ((x) >= DUK_ASC_0 && (x) <= DUK_ASC_3)
#define DUK__ISDIGIT47(x) ((x) >= DUK_ASC_4 && (x) <= DUK_ASC_7)
/* lexer character window helpers */
#define DUK__LOOKUP(lex_ctx,index) ((lex_ctx)->window[(index)].codepoint)
#define DUK__ADVANCECHARS(lex_ctx,count) duk__advance_bytes((lex_ctx), (count) * sizeof(duk_lexer_codepoint))
#define DUK__ADVANCEBYTES(lex_ctx,count) duk__advance_bytes((lex_ctx), (count))
#define DUK__INITBUFFER(lex_ctx) duk__initbuffer((lex_ctx))
#define DUK__APPENDBUFFER(lex_ctx,x) duk__appendbuffer((lex_ctx), (duk_codepoint_t) (x))
/* lookup shorthands (note: assume context variable is named 'lex_ctx') */
#define DUK__L0() DUK__LOOKUP(lex_ctx, 0)
#define DUK__L1() DUK__LOOKUP(lex_ctx, 1)
#define DUK__L2() DUK__LOOKUP(lex_ctx, 2)
#define DUK__L3() DUK__LOOKUP(lex_ctx, 3)
#define DUK__L4() DUK__LOOKUP(lex_ctx, 4)
#define DUK__L5() DUK__LOOKUP(lex_ctx, 5)
/* packed advance/token number macro used by multiple functions */
#define DUK__ADVTOK(advbytes,tok) ((((advbytes) * sizeof(duk_lexer_codepoint)) << 8) + (tok))
/*
* Advance lookup window by N characters, filling in new characters as
* necessary. After returning caller is guaranteed a character window of
* at least DUK_LEXER_WINDOW_SIZE characters.
*
* The main function duk__advance_bytes() is called at least once per every
* token so it has a major lexer/compiler performance impact. There are two
* variants for the main duk__advance_bytes() algorithm: a sliding window
* approach which is slightly faster at the cost of larger code footprint,
* and a simple copying one.
*
* Decoding directly from the source string would be another lexing option.
* But the lookup window based approach has the advantage of hiding the
* source string and its encoding effectively which gives more flexibility
* going forward to e.g. support chunked streaming of source from flash.
*
* Decodes UTF-8/CESU-8 leniently with support for code points from U+0000 to
* U+10FFFF, causing an error if the input is unparseable. Leniency means:
*
* * Unicode code point validation is intentionally not performed,
* except to check that the codepoint does not exceed 0x10ffff.
*
* * In particular, surrogate pairs are allowed and not combined, which
* allows source files to represent all SourceCharacters with CESU-8.
* Broken surrogate pairs are allowed, as Ecmascript does not mandate
* their validation.
*
* * Allow non-shortest UTF-8 encodings.
*
* Leniency here causes few security concerns because all character data is
* decoded into Unicode codepoints before lexer processing, and is then
* re-encoded into CESU-8. The source can be parsed as strict UTF-8 with
* a compiler option. However, Ecmascript source characters include -all-
* 16-bit unsigned integer codepoints, so leniency seems to be appropriate.
*
* Note that codepoints above the BMP are not strictly SourceCharacters,
* but the lexer still accepts them as such. Before ending up in a string
* or an identifier name, codepoints above BMP are converted into surrogate
* pairs and then CESU-8 encoded, resulting in 16-bit Unicode data as
* expected by Ecmascript.
*
* An alternative approach to dealing with invalid or partial sequences
* would be to skip them and replace them with e.g. the Unicode replacement
* character U+FFFD. This has limited utility because a replacement character
* will most likely cause a parse error, unless it occurs inside a string.
* Further, Ecmascript source is typically pure ASCII.
*
* See:
*
* http://en.wikipedia.org/wiki/UTF-8
* http://en.wikipedia.org/wiki/CESU-8
* http://tools.ietf.org/html/rfc3629
* http://en.wikipedia.org/wiki/UTF-8#Invalid_byte_sequences
*
* Future work:
*
* * Reject other invalid Unicode sequences (see Wikipedia entry for examples)
* in strict UTF-8 mode.
*
* * Size optimize. An attempt to use a 16-byte lookup table for the first
* byte resulted in a code increase though.
*
* * Is checking against maximum 0x10ffff really useful? 4-byte encoding
* imposes a certain limit anyway.
*
* * Support chunked streaming of source code. Can be implemented either
* by streaming chunks of bytes or chunks of codepoints.
*/
#if defined(DUK_USE_LEXER_SLIDING_WINDOW)
DUK_LOCAL void duk__fill_lexer_buffer(duk_lexer_ctx *lex_ctx, duk_small_uint_t start_offset_bytes) {
duk_lexer_codepoint *cp, *cp_end;
duk_ucodepoint_t x;
duk_small_uint_t contlen;
const duk_uint8_t *p, *p_end;
#if defined(DUK_USE_STRICT_UTF8_SOURCE)
duk_ucodepoint_t mincp;
#endif
duk_int_t input_line;
/* Use temporaries and update lex_ctx only when finished. */
input_line = lex_ctx->input_line;
p = lex_ctx->input + lex_ctx->input_offset;
p_end = lex_ctx->input + lex_ctx->input_length;
cp = (duk_lexer_codepoint *) (void *) ((duk_uint8_t *) lex_ctx->buffer + start_offset_bytes);
cp_end = lex_ctx->buffer + DUK_LEXER_BUFFER_SIZE;
for (; cp != cp_end; cp++) {
cp->offset = (duk_size_t) (p - lex_ctx->input);
cp->line = input_line;
/* XXX: potential issue with signed pointers, p_end < p. */
if (DUK_UNLIKELY(p >= p_end)) {
/* If input_offset were assigned a negative value, it would
* result in a large positive value. Most likely it would be
* larger than input_length and be caught here. In any case
* no memory unsafe behavior would happen.
*/
cp->codepoint = -1;
continue;
}
x = (duk_ucodepoint_t) (*p++);
/* Fast path. */
if (DUK_LIKELY(x < 0x80UL)) {
DUK_ASSERT(x != 0x2028UL && x != 0x2029UL); /* not LS/PS */
if (DUK_UNLIKELY(x <= 0x000dUL)) {
if ((x == 0x000aUL) ||
((x == 0x000dUL) && (p >= p_end || *p != 0x000aUL))) {
/* lookup for 0x000a above assumes shortest encoding now */
/* E5 Section 7.3, treat the following as newlines:
* LF
* CR [not followed by LF]
* LS
* PS
*
* For CR LF, CR is ignored if it is followed by LF, and the LF will bump
* the line number.
*/
input_line++;
}
}
cp->codepoint = (duk_codepoint_t) x;
continue;
}
/* Slow path. */
if (x < 0xc0UL) {
/* 10xx xxxx -> invalid */
goto error_encoding;
} else if (x < 0xe0UL) {
/* 110x xxxx 10xx xxxx */
contlen = 1;
#if defined(DUK_USE_STRICT_UTF8_SOURCE)
mincp = 0x80UL;
#endif
x = x & 0x1fUL;
} else if (x < 0xf0UL) {
/* 1110 xxxx 10xx xxxx 10xx xxxx */
contlen = 2;
#if defined(DUK_USE_STRICT_UTF8_SOURCE)
mincp = 0x800UL;
#endif
x = x & 0x0fUL;
} else if (x < 0xf8UL) {
/* 1111 0xxx 10xx xxxx 10xx xxxx 10xx xxxx */
contlen = 3;
#if defined(DUK_USE_STRICT_UTF8_SOURCE)
mincp = 0x10000UL;
#endif
x = x & 0x07UL;
} else {
/* no point in supporting encodings of 5 or more bytes */
goto error_encoding;
}
DUK_ASSERT(p_end >= p);
if ((duk_size_t) contlen > (duk_size_t) (p_end - p)) {
goto error_clipped;
}
while (contlen > 0) {
duk_small_uint_t y;
y = *p++;
if ((y & 0xc0U) != 0x80U) {
/* check that byte has the form 10xx xxxx */
goto error_encoding;
}
x = x << 6;
x += y & 0x3fUL;
contlen--;
}
/* check final character validity */
if (x > 0x10ffffUL) {
goto error_encoding;
}
#if defined(DUK_USE_STRICT_UTF8_SOURCE)
if (x < mincp || (x >= 0xd800UL && x <= 0xdfffUL) || x == 0xfffeUL) {
goto error_encoding;
}
#endif
DUK_ASSERT(x != 0x000aUL && x != 0x000dUL);
if ((x == 0x2028UL) || (x == 0x2029UL)) {
input_line++;
}
cp->codepoint = (duk_codepoint_t) x;
}
lex_ctx->input_offset = (duk_size_t) (p - lex_ctx->input);
lex_ctx->input_line = input_line;
return;
error_clipped: /* clipped codepoint */
error_encoding: /* invalid codepoint encoding or codepoint */
lex_ctx->input_offset = (duk_size_t) (p - lex_ctx->input);
lex_ctx->input_line = input_line;
DUK_ERROR_SYNTAX(lex_ctx->thr, "utf-8 decode failed");
}
DUK_LOCAL void duk__advance_bytes(duk_lexer_ctx *lex_ctx, duk_small_uint_t count_bytes) {
duk_small_uint_t used_bytes, avail_bytes;
DUK_ASSERT_DISABLE(count_bytes >= 0); /* unsigned */
DUK_ASSERT(count_bytes <= (duk_small_uint_t) (DUK_LEXER_WINDOW_SIZE * sizeof(duk_lexer_codepoint)));
DUK_ASSERT(lex_ctx->window >= lex_ctx->buffer);
DUK_ASSERT(lex_ctx->window < lex_ctx->buffer + DUK_LEXER_BUFFER_SIZE);
DUK_ASSERT((duk_uint8_t *) lex_ctx->window + count_bytes <= (duk_uint8_t *) lex_ctx->buffer + DUK_LEXER_BUFFER_SIZE * sizeof(duk_lexer_codepoint));
/* Zero 'count' is also allowed to make call sites easier.
* Arithmetic in bytes generates better code in GCC.
*/
lex_ctx->window = (duk_lexer_codepoint *) (void *) ((duk_uint8_t *) lex_ctx->window + count_bytes); /* avoid multiply */
used_bytes = (duk_small_uint_t) ((duk_uint8_t *) lex_ctx->window - (duk_uint8_t *) lex_ctx->buffer);
avail_bytes = DUK_LEXER_BUFFER_SIZE * sizeof(duk_lexer_codepoint) - used_bytes;
if (avail_bytes < (duk_small_uint_t) (DUK_LEXER_WINDOW_SIZE * sizeof(duk_lexer_codepoint))) {
/* Not enough data to provide a full window, so "scroll" window to
* start of buffer and fill up the rest.
*/
DUK_MEMMOVE((void *) lex_ctx->buffer,
(const void *) lex_ctx->window,
(size_t) avail_bytes);
lex_ctx->window = lex_ctx->buffer;
duk__fill_lexer_buffer(lex_ctx, avail_bytes);
}
}
DUK_LOCAL void duk__init_lexer_window(duk_lexer_ctx *lex_ctx) {
lex_ctx->window = lex_ctx->buffer;
duk__fill_lexer_buffer(lex_ctx, 0);
}
#else /* DUK_USE_LEXER_SLIDING_WINDOW */
DUK_LOCAL duk_codepoint_t duk__read_char(duk_lexer_ctx *lex_ctx) {
duk_ucodepoint_t x;
duk_small_uint_t len;
duk_small_uint_t i;
const duk_uint8_t *p;
#if defined(DUK_USE_STRICT_UTF8_SOURCE)
duk_ucodepoint_t mincp;
#endif
duk_size_t input_offset;
input_offset = lex_ctx->input_offset;
if (DUK_UNLIKELY(input_offset >= lex_ctx->input_length)) {
/* If input_offset were assigned a negative value, it would
* result in a large positive value. Most likely it would be
* larger than input_length and be caught here. In any case
* no memory unsafe behavior would happen.
*/
return -1;
}
p = lex_ctx->input + input_offset;
x = (duk_ucodepoint_t) (*p);
if (DUK_LIKELY(x < 0x80UL)) {
/* 0xxx xxxx -> fast path */
/* input offset tracking */
lex_ctx->input_offset++;
DUK_ASSERT(x != 0x2028UL && x != 0x2029UL); /* not LS/PS */
if (DUK_UNLIKELY(x <= 0x000dUL)) {
if ((x == 0x000aUL) ||
((x == 0x000dUL) && (lex_ctx->input_offset >= lex_ctx->input_length ||
lex_ctx->input[lex_ctx->input_offset] != 0x000aUL))) {
/* lookup for 0x000a above assumes shortest encoding now */
/* E5 Section 7.3, treat the following as newlines:
* LF
* CR [not followed by LF]
* LS
* PS
*
* For CR LF, CR is ignored if it is followed by LF, and the LF will bump
* the line number.
*/
lex_ctx->input_line++;
}
}
return (duk_codepoint_t) x;
}
/* Slow path. */
if (x < 0xc0UL) {
/* 10xx xxxx -> invalid */
goto error_encoding;
} else if (x < 0xe0UL) {
/* 110x xxxx 10xx xxxx */
len = 2;
#if defined(DUK_USE_STRICT_UTF8_SOURCE)
mincp = 0x80UL;
#endif
x = x & 0x1fUL;
} else if (x < 0xf0UL) {
/* 1110 xxxx 10xx xxxx 10xx xxxx */
len = 3;
#if defined(DUK_USE_STRICT_UTF8_SOURCE)
mincp = 0x800UL;
#endif
x = x & 0x0fUL;
} else if (x < 0xf8UL) {
/* 1111 0xxx 10xx xxxx 10xx xxxx 10xx xxxx */
len = 4;
#if defined(DUK_USE_STRICT_UTF8_SOURCE)
mincp = 0x10000UL;
#endif
x = x & 0x07UL;
} else {
/* no point in supporting encodings of 5 or more bytes */
goto error_encoding;
}
DUK_ASSERT(lex_ctx->input_length >= lex_ctx->input_offset);
if ((duk_size_t) len > (duk_size_t) (lex_ctx->input_length - lex_ctx->input_offset)) {
goto error_clipped;
}
p++;
for (i = 1; i < len; i++) {
duk_small_uint_t y;
y = *p++;
if ((y & 0xc0U) != 0x80U) {
/* check that byte has the form 10xx xxxx */
goto error_encoding;
}
x = x << 6;
x += y & 0x3fUL;
}
/* check final character validity */
if (x > 0x10ffffUL) {
goto error_encoding;
}
#if defined(DUK_USE_STRICT_UTF8_SOURCE)
if (x < mincp || (x >= 0xd800UL && x <= 0xdfffUL) || x == 0xfffeUL) {
goto error_encoding;
}
#endif
/* input offset tracking */
lex_ctx->input_offset += len;
/* line tracking */
DUK_ASSERT(x != 0x000aUL && x != 0x000dUL);
if ((x == 0x2028UL) || (x == 0x2029UL)) {
lex_ctx->input_line++;
}
return (duk_codepoint_t) x;
error_clipped: /* clipped codepoint */
error_encoding: /* invalid codepoint encoding or codepoint */
DUK_ERROR_SYNTAX(lex_ctx->thr, "utf-8 decode failed");
return 0;
}
DUK_LOCAL void duk__advance_bytes(duk_lexer_ctx *lex_ctx, duk_small_uint_t count_bytes) {
duk_small_uint_t keep_bytes;
duk_lexer_codepoint *cp, *cp_end;
DUK_ASSERT_DISABLE(count_bytes >= 0); /* unsigned */
DUK_ASSERT(count_bytes <= (duk_small_uint_t) (DUK_LEXER_WINDOW_SIZE * sizeof(duk_lexer_codepoint)));
/* Zero 'count' is also allowed to make call sites easier. */
keep_bytes = DUK_LEXER_WINDOW_SIZE * sizeof(duk_lexer_codepoint) - count_bytes;
DUK_MEMMOVE((void *) lex_ctx->window,
(const void *) ((duk_uint8_t *) lex_ctx->window + count_bytes),
(size_t) keep_bytes);
cp = (duk_lexer_codepoint *) ((duk_uint8_t *) lex_ctx->window + keep_bytes);
cp_end = lex_ctx->window + DUK_LEXER_WINDOW_SIZE;
for (; cp != cp_end; cp++) {
cp->offset = lex_ctx->input_offset;
cp->line = lex_ctx->input_line;
cp->codepoint = duk__read_char(lex_ctx);
}
}
DUK_LOCAL void duk__init_lexer_window(duk_lexer_ctx *lex_ctx) {
/* Call with count == DUK_LEXER_WINDOW_SIZE to fill buffer initially. */
duk__advance_bytes(lex_ctx, DUK_LEXER_WINDOW_SIZE * sizeof(duk_lexer_codepoint)); /* fill window */
}
#endif /* DUK_USE_LEXER_SLIDING_WINDOW */
/*
* (Re)initialize the temporary byte buffer. May be called extra times
* with little impact.
*/
DUK_LOCAL void duk__initbuffer(duk_lexer_ctx *lex_ctx) {
/* Reuse buffer as is unless buffer has grown large. */
if (DUK_HBUFFER_DYNAMIC_GET_SIZE(lex_ctx->buf) < DUK_LEXER_TEMP_BUF_LIMIT) {
/* Keep current size */
} else {
duk_hbuffer_resize(lex_ctx->thr, lex_ctx->buf, DUK_LEXER_TEMP_BUF_LIMIT);
}
DUK_BW_INIT_WITHBUF(lex_ctx->thr, &lex_ctx->bw, lex_ctx->buf);
}
/*
* Append a Unicode codepoint to the temporary byte buffer. Performs
* CESU-8 surrogate pair encoding for codepoints above the BMP.
* Existing surrogate pairs are allowed and also encoded into CESU-8.
*/
DUK_LOCAL void duk__appendbuffer(duk_lexer_ctx *lex_ctx, duk_codepoint_t x) {
/*
* Since character data is only generated by decoding the source or by
* the compiler itself, we rely on the input codepoints being correct
* and avoid a check here.
*
* Character data can also come here through decoding of Unicode
* escapes ("\udead\ubeef") so all 16-but unsigned values can be
* present, even when the source file itself is strict UTF-8.
*/
DUK_ASSERT(x >= 0 && x <= 0x10ffff);
DUK_BW_WRITE_ENSURE_CESU8(lex_ctx->thr, &lex_ctx->bw, (duk_ucodepoint_t) x);
}
/*
* Intern the temporary byte buffer into a valstack slot
* (in practice, slot1 or slot2).
*/
DUK_LOCAL void duk__internbuffer(duk_lexer_ctx *lex_ctx, duk_idx_t valstack_idx) {
duk_context *ctx = (duk_context *) lex_ctx->thr;
DUK_ASSERT(valstack_idx == lex_ctx->slot1_idx || valstack_idx == lex_ctx->slot2_idx);
DUK_BW_PUSH_AS_STRING(lex_ctx->thr, &lex_ctx->bw);
duk_replace(ctx, valstack_idx);
}
/*
* Init lexer context
*/
DUK_INTERNAL void duk_lexer_initctx(duk_lexer_ctx *lex_ctx) {
DUK_ASSERT(lex_ctx != NULL);
DUK_MEMZERO(lex_ctx, sizeof(*lex_ctx));
#if defined(DUK_USE_EXPLICIT_NULL_INIT)
#if defined(DUK_USE_LEXER_SLIDING_WINDOW)
lex_ctx->window = NULL;
#endif
lex_ctx->thr = NULL;
lex_ctx->input = NULL;
lex_ctx->buf = NULL;
#endif
}
/*
* Set lexer input position and reinitialize lookup window.
*/
/* NB: duk_lexer_getpoint() is a macro only */
DUK_INTERNAL void duk_lexer_setpoint(duk_lexer_ctx *lex_ctx, duk_lexer_point *pt) {
DUK_ASSERT_DISABLE(pt->offset >= 0); /* unsigned */
DUK_ASSERT(pt->line >= 1);
lex_ctx->input_offset = pt->offset;
lex_ctx->input_line = pt->line;
duk__init_lexer_window(lex_ctx);
}
/*
* Lexing helpers
*/
/* numeric value of a hex digit (also covers octal and decimal digits) */
DUK_LOCAL duk_codepoint_t duk__hexval(duk_lexer_ctx *lex_ctx, duk_codepoint_t x) {
duk_small_int_t t;
/* Here 'x' is a Unicode codepoint */
if (DUK_LIKELY(x >= 0 && x <= 0xff)) {
t = duk_hex_dectab[x];
if (DUK_LIKELY(t >= 0)) {
return t;
}
}
/* Throwing an error this deep makes the error rather vague, but
* saves hundreds of bytes of code.
*/
DUK_ERROR_SYNTAX(lex_ctx->thr, "decode error");
return 0;
}
/* having this as a separate function provided a size benefit */
DUK_LOCAL duk_bool_t duk__is_hex_digit(duk_codepoint_t x) {
if (DUK_LIKELY(x >= 0 && x <= 0xff)) {
return (duk_hex_dectab[x] >= 0);
}
return 0;
}
DUK_LOCAL duk_codepoint_t duk__decode_hexesc_from_window(duk_lexer_ctx *lex_ctx, duk_small_int_t lookup_offset) {
/* validation performed by duk__hexval */
return (duk__hexval(lex_ctx, lex_ctx->window[lookup_offset].codepoint) << 4) |
(duk__hexval(lex_ctx, lex_ctx->window[lookup_offset + 1].codepoint));
}
DUK_LOCAL duk_codepoint_t duk__decode_uniesc_from_window(duk_lexer_ctx *lex_ctx, duk_small_int_t lookup_offset) {
/* validation performed by duk__hexval */
return (duk__hexval(lex_ctx, lex_ctx->window[lookup_offset].codepoint) << 12) |
(duk__hexval(lex_ctx, lex_ctx->window[lookup_offset + 1].codepoint) << 8) |
(duk__hexval(lex_ctx, lex_ctx->window[lookup_offset + 2].codepoint) << 4) |
(duk__hexval(lex_ctx, lex_ctx->window[lookup_offset + 3].codepoint));
}
/*
* Parse Ecmascript source InputElementDiv or InputElementRegExp
* (E5 Section 7), skipping whitespace, comments, and line terminators.
*
* Possible results are:
* (1) a token
* (2) a line terminator (skipped)
* (3) a comment (skipped)
* (4) EOF
*
* White space is automatically skipped from the current position (but
* not after the input element). If input has already ended, returns
* DUK_TOK_EOF indefinitely. If a parse error occurs, uses an DUK_ERROR()
* macro call (and hence a longjmp through current heap longjmp context).
* Comments and line terminator tokens are automatically skipped.
*
* The input element being matched is determined by regexp_mode; if set,
* parses a InputElementRegExp, otherwise a InputElementDiv. The
* difference between these are handling of productions starting with a
* forward slash.
*
* If strict_mode is set, recognizes additional future reserved words
* specific to strict mode, and refuses to parse octal literals.
*
* The matching strategy below is to (currently) use a six character
* lookup window to quickly determine which production is the -longest-
* matching one, and then parse that. The top-level if-else clauses
* match the first character, and the code blocks for each clause
* handle -all- alternatives for that first character. Ecmascript
* specification uses the "longest match wins" semantics, so the order
* of the if-clauses matters.
*
* Misc notes:
*
* * Ecmascript numeric literals do not accept a sign character.
* Consequently e.g. "-1.0" is parsed as two tokens: a negative
* sign and a positive numeric literal. The compiler performs
* the negation during compilation, so this has no adverse impact.
*
* * There is no token for "undefined": it is just a value available
* from the global object (or simply established by doing a reference
* to an undefined value).
*
* * Some contexts want Identifier tokens, which are IdentifierNames
* excluding reserved words, while some contexts want IdentifierNames
* directly. In the latter case e.g. "while" is interpreted as an
* identifier name, not a DUK_TOK_WHILE token. The solution here is
* to provide both token types: DUK_TOK_WHILE goes to 't' while
* DUK_TOK_IDENTIFIER goes to 't_nores', and 'slot1' always contains
* the identifier / keyword name.
*
* * Directive prologue needs to identify string literals such as
* "use strict" and 'use strict', which are sensitive to line
* continuations and escape sequences. For instance, "use\u0020strict"
* is a valid directive but is distinct from "use strict". The solution
* here is to decode escapes while tokenizing, but to keep track of the
* number of escapes. Directive detection can then check that the
* number of escapes is zero.
*
* * Multi-line comments with one or more internal LineTerminator are
* treated like a line terminator to comply with automatic semicolon
* insertion.
*/
DUK_INTERNAL
void duk_lexer_parse_js_input_element(duk_lexer_ctx *lex_ctx,
duk_token *out_token,
duk_bool_t strict_mode,
duk_bool_t regexp_mode) {
duk_codepoint_t x; /* temporary, must be signed and 32-bit to hold Unicode code points */
duk_small_uint_t advtok = 0; /* (advance << 8) + token_type, updated at function end,
* init is unnecessary but suppresses "may be used uninitialized" warnings.
*/
duk_bool_t got_lineterm = 0; /* got lineterm preceding non-whitespace, non-lineterm token */
if (++lex_ctx->token_count >= lex_ctx->token_limit) {
DUK_ERROR_RANGE(lex_ctx->thr, "token limit");
return; /* unreachable */
}
out_token->t = DUK_TOK_EOF;
out_token->t_nores = -1; /* marker: copy t if not changed */
#if 0 /* not necessary to init, disabled for faster parsing */
out_token->num = DUK_DOUBLE_NAN;
out_token->str1 = NULL;
out_token->str2 = NULL;
#endif
out_token->num_escapes = 0;
/* out_token->lineterm set by caller */
/* This would be nice, but parsing is faster without resetting the
* value slots. The only side effect is that references to temporary
* string values may linger until lexing is finished; they're then
* freed normally.
*/
#if 0
duk_to_undefined((duk_context *) lex_ctx->thr, lex_ctx->slot1_idx);
duk_to_undefined((duk_context *) lex_ctx->thr, lex_ctx->slot2_idx);
#endif
/* 'advtok' indicates how much to advance and which token id to assign
* at the end. This shared functionality minimizes code size. All
* code paths are required to set 'advtok' to some value, so no default
* init value is used. Code paths calling DUK_ERROR() never return so
* they don't need to set advtok.
*/
/*
* Matching order:
*
* Punctuator first chars, also covers comments, regexps
* LineTerminator
* Identifier or reserved word, also covers null/true/false literals
* NumericLiteral
* StringLiteral
* EOF
*
* The order does not matter as long as the longest match is
* always correctly identified. There are order dependencies
* in the clauses, so it's not trivial to convert to a switch.
*/
restart_lineupdate:
out_token->start_line = lex_ctx->window[0].line;
restart:
out_token->start_offset = lex_ctx->window[0].offset;
x = DUK__L0();
switch (x) {
case DUK_ASC_SPACE:
case DUK_ASC_HT: /* fast paths for space and tab */
DUK__ADVANCECHARS(lex_ctx, 1);
goto restart;
case DUK_ASC_LF: /* LF line terminator; CR LF and Unicode lineterms are handled in slow path */
DUK__ADVANCECHARS(lex_ctx, 1);
got_lineterm = 1;
goto restart_lineupdate;
case DUK_ASC_SLASH: /* '/' */
if (DUK__L1() == '/') {
/*
* E5 Section 7.4, allow SourceCharacter (which is any 16-bit
* code point).
*/
/* DUK__ADVANCECHARS(lex_ctx, 2) would be correct here, but it unnecessary */
for (;;) {
x = DUK__L0();
if (x < 0 || duk_unicode_is_line_terminator(x)) {
break;
}
DUK__ADVANCECHARS(lex_ctx, 1);
}
goto restart; /* line terminator will be handled on next round */
} else if (DUK__L1() == '*') {
/*
* E5 Section 7.4. If the multi-line comment contains a newline,
* it is treated like a single line terminator for automatic
* semicolon insertion.
*/
duk_bool_t last_asterisk = 0;
DUK__ADVANCECHARS(lex_ctx, 2);
for (;;) {
x = DUK__L0();
if (x < 0) {
DUK_ERROR_SYNTAX(lex_ctx->thr, "eof in multiline comment");
}
DUK__ADVANCECHARS(lex_ctx, 1);
if (last_asterisk && x == '/') {
break;
}
if (duk_unicode_is_line_terminator(x)) {
got_lineterm = 1;
}
last_asterisk = (x == '*');
}
goto restart_lineupdate;
} else if (regexp_mode) {
#if defined(DUK_USE_REGEXP_SUPPORT)
/*
* "/" followed by something in regexp mode. See E5 Section 7.8.5.
*
* RegExp parsing is a bit complex. First, the regexp body is delimited
* by forward slashes, but the body may also contain forward slashes as
* part of an escape sequence or inside a character class (delimited by
* square brackets). A mini state machine is used to implement these.
*
* Further, an early (parse time) error must be thrown if the regexp
* would cause a run-time error when used in the expression new RegExp(...).
* Parsing here simply extracts the (candidate) regexp, and also accepts
* invalid regular expressions (which are delimited properly). The caller
* (compiler) must perform final validation and regexp compilation.
*
* RegExp first char may not be '/' (single line comment) or '*' (multi-
* line comment). These have already been checked above, so there is no
* need below for special handling of the first regexp character as in
* the E5 productions.
*
* About unicode escapes within regexp literals:
*
* E5 Section 7.8.5 grammar does NOT accept \uHHHH escapes.
* However, Section 6 states that regexps accept the escapes,
* see paragraph starting with "In string literals...".
* The regexp grammar, which sees the decoded regexp literal
* (after lexical parsing) DOES have a \uHHHH unicode escape.
* So, for instance:
*
* /\u1234/
*
* should first be parsed by the lexical grammar as:
*
* '\' 'u' RegularExpressionBackslashSequence
* '1' RegularExpressionNonTerminator
* '2' RegularExpressionNonTerminator
* '3' RegularExpressionNonTerminator
* '4' RegularExpressionNonTerminator
*
* and the escape itself is then parsed by the regexp engine.
* This is the current implementation.
*
* Minor spec inconsistency:
*
* E5 Section 7.8.5 RegularExpressionBackslashSequence is:
*
* \ RegularExpressionNonTerminator
*
* while Section A.1 RegularExpressionBackslashSequence is:
*
* \ NonTerminator
*
* The latter is not normative and a typo.
*
*/
/* first, parse regexp body roughly */
duk_small_int_t state = 0; /* 0=base, 1=esc, 2=class, 3=class+esc */
DUK__INITBUFFER(lex_ctx);
for (;;) {
DUK__ADVANCECHARS(lex_ctx, 1); /* skip opening slash on first loop */
x = DUK__L0();
if (x < 0 || duk_unicode_is_line_terminator(x)) {
DUK_ERROR_SYNTAX(lex_ctx->thr, "eof or line terminator in regexp");
}
x = DUK__L0(); /* re-read to avoid spill / fetch */
if (state == 0) {
if (x == '/') {
DUK__ADVANCECHARS(lex_ctx, 1); /* eat closing slash */
break;
} else if (x == '\\') {
state = 1;
} else if (x == '[') {
state = 2;
}
} else if (state == 1) {
state = 0;
} else if (state == 2) {
if (x == ']') {
state = 0;
} else if (x == '\\') {
state = 3;
}
} else { /* state == 3 */
state = 2;
}
DUK__APPENDBUFFER(lex_ctx, x);
}
duk__internbuffer(lex_ctx, lex_ctx->slot1_idx);
out_token->str1 = duk_get_hstring((duk_context *) lex_ctx->thr, lex_ctx->slot1_idx);
/* second, parse flags */
DUK__INITBUFFER(lex_ctx);
for (;;) {
x = DUK__L0();
if (!duk_unicode_is_identifier_part(x)) {
break;
}
x = DUK__L0(); /* re-read to avoid spill / fetch */
DUK__APPENDBUFFER(lex_ctx, x);
DUK__ADVANCECHARS(lex_ctx, 1);
}
duk__internbuffer(lex_ctx, lex_ctx->slot2_idx);
out_token->str2 = duk_get_hstring((duk_context *) lex_ctx->thr, lex_ctx->slot2_idx);
DUK__INITBUFFER(lex_ctx); /* free some memory */
/* validation of the regexp is caller's responsibility */
advtok = DUK__ADVTOK(0, DUK_TOK_REGEXP);
#else
DUK_ERROR_SYNTAX(lex_ctx->thr, "regexp support disabled");
#endif
} else if (DUK__L1() == '=') {
/* "/=" and not in regexp mode */
advtok = DUK__ADVTOK(2, DUK_TOK_DIV_EQ);
} else {
/* "/" and not in regexp mode */
advtok = DUK__ADVTOK(1, DUK_TOK_DIV);
}
break;
case DUK_ASC_LCURLY: /* '{' */
advtok = DUK__ADVTOK(1, DUK_TOK_LCURLY);
break;
case DUK_ASC_RCURLY: /* '}' */
advtok = DUK__ADVTOK(1, DUK_TOK_RCURLY);
break;
case DUK_ASC_LPAREN: /* '(' */
advtok = DUK__ADVTOK(1, DUK_TOK_LPAREN);
break;
case DUK_ASC_RPAREN: /* ')' */
advtok = DUK__ADVTOK(1, DUK_TOK_RPAREN);
break;
case DUK_ASC_LBRACKET: /* '[' */
advtok = DUK__ADVTOK(1, DUK_TOK_LBRACKET);
break;
case DUK_ASC_RBRACKET: /* ']' */
advtok = DUK__ADVTOK(1, DUK_TOK_RBRACKET);
break;
case DUK_ASC_PERIOD: /* '.' */
if (DUK__ISDIGIT(DUK__L1())) {
/* Period followed by a digit can only start DecimalLiteral
* (handled in slow path). We could jump straight into the
* DecimalLiteral handling but should avoid goto to inside
* a block.
*/
goto slow_path;
}
advtok = DUK__ADVTOK(1, DUK_TOK_PERIOD);
break;
case DUK_ASC_SEMICOLON: /* ';' */
advtok = DUK__ADVTOK(1, DUK_TOK_SEMICOLON);
break;
case DUK_ASC_COMMA: /* ',' */
advtok = DUK__ADVTOK(1, DUK_TOK_COMMA);
break;
case DUK_ASC_LANGLE: /* '<' */
if (DUK__L1() == '<' && DUK__L2() == '=') {
advtok = DUK__ADVTOK(3, DUK_TOK_ALSHIFT_EQ);
} else if (DUK__L1() == '=') {
advtok = DUK__ADVTOK(2, DUK_TOK_LE);
} else if (DUK__L1() == '<') {
advtok = DUK__ADVTOK(2, DUK_TOK_ALSHIFT);
} else {
advtok = DUK__ADVTOK(1, DUK_TOK_LT);
}
break;
case DUK_ASC_RANGLE: /* '>' */
if (DUK__L1() == '>' && DUK__L2() == '>' && DUK__L3() == '=') {
advtok = DUK__ADVTOK(4, DUK_TOK_RSHIFT_EQ);
} else if (DUK__L1() == '>' && DUK__L2() == '>') {
advtok = DUK__ADVTOK(3, DUK_TOK_RSHIFT);
} else if (DUK__L1() == '>' && DUK__L2() == '=') {
advtok = DUK__ADVTOK(3, DUK_TOK_ARSHIFT_EQ);
} else if (DUK__L1() == '=') {
advtok = DUK__ADVTOK(2, DUK_TOK_GE);
} else if (DUK__L1() == '>') {
advtok = DUK__ADVTOK(2, DUK_TOK_ARSHIFT);
} else {
advtok = DUK__ADVTOK(1, DUK_TOK_GT);
}
break;
case DUK_ASC_EQUALS: /* '=' */
if (DUK__L1() == '=' && DUK__L2() == '=') {
advtok = DUK__ADVTOK(3, DUK_TOK_SEQ);
} else if (DUK__L1() == '=') {
advtok = DUK__ADVTOK(2, DUK_TOK_EQ);
} else {
advtok = DUK__ADVTOK(1, DUK_TOK_EQUALSIGN);
}
break;
case DUK_ASC_EXCLAMATION: /* '!' */
if (DUK__L1() == '=' && DUK__L2() == '=') {
advtok = DUK__ADVTOK(3, DUK_TOK_SNEQ);
} else if (DUK__L1() == '=') {
advtok = DUK__ADVTOK(2, DUK_TOK_NEQ);
} else {
advtok = DUK__ADVTOK(1, DUK_TOK_LNOT);
}
break;
case DUK_ASC_PLUS: /* '+' */
if (DUK__L1() == '+') {
advtok = DUK__ADVTOK(2, DUK_TOK_INCREMENT);
} else if (DUK__L1() == '=') {
advtok = DUK__ADVTOK(2, DUK_TOK_ADD_EQ);
} else {
advtok = DUK__ADVTOK(1, DUK_TOK_ADD);
}
break;
case DUK_ASC_MINUS: /* '-' */
if (DUK__L1() == '-') {
advtok = DUK__ADVTOK(2, DUK_TOK_DECREMENT);
} else if (DUK__L1() == '=') {
advtok = DUK__ADVTOK(2, DUK_TOK_SUB_EQ);
} else {
advtok = DUK__ADVTOK(1, DUK_TOK_SUB);
}
break;
case DUK_ASC_STAR: /* '*' */
if (DUK__L1() == '=') {
advtok = DUK__ADVTOK(2, DUK_TOK_MUL_EQ);
} else {
advtok = DUK__ADVTOK(1, DUK_TOK_MUL);
}
break;
case DUK_ASC_PERCENT: /* '%' */
if (DUK__L1() == '=') {
advtok = DUK__ADVTOK(2, DUK_TOK_MOD_EQ);
} else {
advtok = DUK__ADVTOK(1, DUK_TOK_MOD);
}
break;
case DUK_ASC_AMP: /* '&' */
if (DUK__L1() == '&') {
advtok = DUK__ADVTOK(2, DUK_TOK_LAND);
} else if (DUK__L1() == '=') {
advtok = DUK__ADVTOK(2, DUK_TOK_BAND_EQ);
} else {
advtok = DUK__ADVTOK(1, DUK_TOK_BAND);
}
break;
case DUK_ASC_PIPE: /* '|' */
if (DUK__L1() == '|') {
advtok = DUK__ADVTOK(2, DUK_TOK_LOR);
} else if (DUK__L1() == '=') {
advtok = DUK__ADVTOK(2, DUK_TOK_BOR_EQ);
} else {
advtok = DUK__ADVTOK(1, DUK_TOK_BOR);
}
break;
case DUK_ASC_CARET: /* '^' */
if (DUK__L1() == '=') {
advtok = DUK__ADVTOK(2, DUK_TOK_BXOR_EQ);
} else {
advtok = DUK__ADVTOK(1, DUK_TOK_BXOR);
}
break;
case DUK_ASC_TILDE: /* '~' */
advtok = DUK__ADVTOK(1, DUK_TOK_BNOT);
break;
case DUK_ASC_QUESTION: /* '?' */
advtok = DUK__ADVTOK(1, DUK_TOK_QUESTION);
break;
case DUK_ASC_COLON: /* ':' */
advtok = DUK__ADVTOK(1, DUK_TOK_COLON);
break;
case DUK_ASC_DOUBLEQUOTE: /* '"' */
case DUK_ASC_SINGLEQUOTE: { /* '\'' */
duk_small_int_t quote = x; /* Note: duk_uint8_t type yields larger code */
duk_small_int_t adv;
DUK__INITBUFFER(lex_ctx);
for (;;) {
DUK__ADVANCECHARS(lex_ctx, 1); /* eat opening quote on first loop */
x = DUK__L0();
if (x < 0 || duk_unicode_is_line_terminator(x)) {
DUK_ERROR_SYNTAX(lex_ctx->thr, "eof or line terminator in string literal");
}
if (x == quote) {
DUK__ADVANCECHARS(lex_ctx, 1); /* eat closing quote */
break;
}
if (x == '\\') {
/* DUK__L0 -> '\' char
* DUK__L1 ... DUK__L5 -> more lookup
*/
x = DUK__L1();
/* How much to advance before next loop; note that next loop
* will advance by 1 anyway, so -1 from the total escape
* length (e.g. len('\uXXXX') - 1 = 6 - 1). As a default,
* 1 is good.
*/
adv = 2 - 1; /* note: long live range */
if (x < 0) {
DUK_ERROR_SYNTAX(lex_ctx->thr, "eof or line terminator in string literal");
}
if (duk_unicode_is_line_terminator(x)) {
/* line continuation */
if (x == 0x000d && DUK__L2() == 0x000a) {
/* CR LF again a special case */
adv = 3 - 1;
}
} else if (x == '\'') {
DUK__APPENDBUFFER(lex_ctx, 0x0027);
} else if (x == '"') {
DUK__APPENDBUFFER(lex_ctx, 0x0022);
} else if (x == '\\') {
DUK__APPENDBUFFER(lex_ctx, 0x005c);
} else if (x == 'b') {
DUK__APPENDBUFFER(lex_ctx, 0x0008);
} else if (x == 'f') {
DUK__APPENDBUFFER(lex_ctx, 0x000c);
} else if (x == 'n') {
DUK__APPENDBUFFER(lex_ctx, 0x000a);
} else if (x == 'r') {
DUK__APPENDBUFFER(lex_ctx, 0x000d);
} else if (x == 't') {
DUK__APPENDBUFFER(lex_ctx, 0x0009);
} else if (x == 'v') {
DUK__APPENDBUFFER(lex_ctx, 0x000b);
} else if (x == 'x') {
adv = 4 - 1;
DUK__APPENDBUFFER(lex_ctx, duk__decode_hexesc_from_window(lex_ctx, 2));
} else if (x == 'u') {
adv = 6 - 1;
DUK__APPENDBUFFER(lex_ctx, duk__decode_uniesc_from_window(lex_ctx, 2));
} else if (DUK__ISDIGIT(x)) {
duk_codepoint_t ch = 0; /* initialized to avoid warnings of unused var */
/*
* Octal escape or zero escape:
* \0 (lookahead not DecimalDigit)
* \1 ... \7 (lookahead not DecimalDigit)
* \ZeroToThree OctalDigit (lookahead not DecimalDigit)
* \FourToSeven OctalDigit (no lookahead restrictions)
* \ZeroToThree OctalDigit OctalDigit (no lookahead restrictions)
*
* Zero escape is part of the standard syntax. Octal escapes are
* defined in E5 Section B.1.2, and are only allowed in non-strict mode.
* Any other productions starting with a decimal digit are invalid.
*/
if (x == '0' && !DUK__ISDIGIT(DUK__L2())) {
/* Zero escape (also allowed in non-strict mode) */
ch = 0;
/* adv = 2 - 1 default OK */
#if defined(DUK_USE_OCTAL_SUPPORT)
} else if (strict_mode) {
/* No other escape beginning with a digit in strict mode */
DUK_ERROR_SYNTAX(lex_ctx->thr, "invalid escape in string literal");
} else if (DUK__ISDIGIT03(x) && DUK__ISOCTDIGIT(DUK__L2()) && DUK__ISOCTDIGIT(DUK__L3())) {
/* Three digit octal escape, digits validated. */
adv = 4 - 1;
ch = (duk__hexval(lex_ctx, x) << 6) +
(duk__hexval(lex_ctx, DUK__L2()) << 3) +
duk__hexval(lex_ctx, DUK__L3());
} else if (((DUK__ISDIGIT03(x) && !DUK__ISDIGIT(DUK__L3())) || DUK__ISDIGIT47(x)) &&
DUK__ISOCTDIGIT(DUK__L2())) {
/* Two digit octal escape, digits validated.
*
* The if-condition is a bit tricky. We could catch e.g.
* '\039' in the three-digit escape and fail it there (by
* validating the digits), but we want to avoid extra
* additional validation code.
*/
adv = 3 - 1;
ch = (duk__hexval(lex_ctx, x) << 3) +
duk__hexval(lex_ctx, DUK__L2());
} else if (DUK__ISDIGIT(x) && !DUK__ISDIGIT(DUK__L2())) {
/* One digit octal escape, digit validated. */
/* adv = 2 default OK */
ch = duk__hexval(lex_ctx, x);
#else
/* fall through to error */
#endif
} else {
DUK_ERROR_SYNTAX(lex_ctx->thr, "invalid escape in string literal");
}
DUK__APPENDBUFFER(lex_ctx, ch);
} else {
/* escaped NonEscapeCharacter */
DUK__APPENDBUFFER(lex_ctx, x);
}
DUK__ADVANCECHARS(lex_ctx, adv);
/* Track number of escapes; count not really needed but directive
* prologues need to detect whether there were any escapes or line
* continuations or not.
*/
out_token->num_escapes++;
} else {
/* part of string */
DUK__APPENDBUFFER(lex_ctx, x);
}
}
duk__internbuffer(lex_ctx, lex_ctx->slot1_idx);
out_token->str1 = duk_get_hstring((duk_context *) lex_ctx->thr, lex_ctx->slot1_idx);
DUK__INITBUFFER(lex_ctx); /* free some memory */
advtok = DUK__ADVTOK(0, DUK_TOK_STRING);
break;
}
default:
goto slow_path;
} /* switch */
goto skip_slow_path;
slow_path:
if (duk_unicode_is_line_terminator(x)) {
if (x == 0x000d && DUK__L1() == 0x000a) {
/*
* E5 Section 7.3: CR LF is detected as a single line terminator for
* line numbers. Here we also detect it as a single line terminator
* token.
*/
DUK__ADVANCECHARS(lex_ctx, 2);
} else {
DUK__ADVANCECHARS(lex_ctx, 1);
}
got_lineterm = 1;
goto restart_lineupdate;
} else if (duk_unicode_is_identifier_start(x) || x == '\\') {
/*
* Parse an identifier and then check whether it is:
* - reserved word (keyword or other reserved word)
* - "null" (NullLiteral)
* - "true" (BooleanLiteral)
* - "false" (BooleanLiteral)
* - anything else => identifier
*
* This does not follow the E5 productions cleanly, but is
* useful and compact.
*
* Note that identifiers may contain Unicode escapes,
* see E5 Sections 6 and 7.6. They must be decoded first,
* and the result checked against allowed characters.
* The above if-clause accepts an identifier start and an
* '\' character -- no other token can begin with a '\'.
*
* Note that "get" and "set" are not reserved words in E5
* specification so they are recognized as plain identifiers
* (the tokens DUK_TOK_GET and DUK_TOK_SET are actually not
* used now). The compiler needs to work around this.
*
* Strictly speaking, following Ecmascript longest match
* specification, an invalid escape for the first character
* should cause a syntax error. However, an invalid escape
* for IdentifierParts should just terminate the identifier
* early (longest match), and let the next tokenization
* fail. For instance Rhino croaks with 'foo\z' when
* parsing the identifier. This has little practical impact.
*/
duk_small_int_t i, i_end;
duk_bool_t first = 1;
duk_hstring *str;
DUK__INITBUFFER(lex_ctx);
for (;;) {
/* re-lookup first char on first loop */
if (DUK__L0() == '\\') {
duk_codepoint_t ch;
if (DUK__L1() != 'u') {
DUK_ERROR_SYNTAX(lex_ctx->thr, "invalid unicode escape in identifier");
}
ch = duk__decode_uniesc_from_window(lex_ctx, 2);
/* IdentifierStart is stricter than IdentifierPart, so if the first
* character is escaped, must have a stricter check here.
*/
if (!(first ? duk_unicode_is_identifier_start(ch) : duk_unicode_is_identifier_part(ch))) {
DUK_ERROR_SYNTAX(lex_ctx->thr, "invalid unicode escape in identifier");
}
DUK__APPENDBUFFER(lex_ctx, ch);
DUK__ADVANCECHARS(lex_ctx, 6);
/* Track number of escapes: necessary for proper keyword
* detection.
*/
out_token->num_escapes++;
} else {
/* Note: first character is checked against this. But because
* IdentifierPart includes all IdentifierStart characters, and
* the first character (if unescaped) has already been checked
* in the if condition, this is OK.
*/
if (!duk_unicode_is_identifier_part(DUK__L0())) {
break;
}
DUK__APPENDBUFFER(lex_ctx, DUK__L0());
DUK__ADVANCECHARS(lex_ctx, 1);
}
first = 0;
}
duk__internbuffer(lex_ctx, lex_ctx->slot1_idx);
out_token->str1 = duk_get_hstring((duk_context *) lex_ctx->thr, lex_ctx->slot1_idx);
str = out_token->str1;
DUK_ASSERT(str != NULL);
out_token->t_nores = DUK_TOK_IDENTIFIER;
DUK__INITBUFFER(lex_ctx); /* free some memory */
/*
* Interned identifier is compared against reserved words, which are
* currently interned into the heap context. See genbuiltins.py.
*
* Note that an escape in the identifier disables recognition of
* keywords; e.g. "\u0069f = 1;" is a valid statement (assigns to
* identifier named "if"). This is not necessarily compliant,
* see test-dec-escaped-char-in-keyword.js.
*
* Note: "get" and "set" are awkward. They are not officially
* ReservedWords (and indeed e.g. "var set = 1;" is valid), and
* must come out as DUK_TOK_IDENTIFIER. The compiler needs to
* work around this a bit.
*/
/* XXX: optimize by adding the token numbers directly into the
* always interned duk_hstring objects (there should be enough
* flag bits free for that)?
*/
i_end = (strict_mode ? DUK_STRIDX_END_RESERVED : DUK_STRIDX_START_STRICT_RESERVED);
advtok = DUK__ADVTOK(0, DUK_TOK_IDENTIFIER);
if (out_token->num_escapes == 0) {
for (i = DUK_STRIDX_START_RESERVED; i < i_end; i++) {
DUK_ASSERT(i >= 0 && i < DUK_HEAP_NUM_STRINGS);
if (DUK_HTHREAD_GET_STRING(lex_ctx->thr, i) == str) {
advtok = DUK__ADVTOK(0, DUK_STRIDX_TO_TOK(i));
break;
}
}
}
} else if (DUK__ISDIGIT(x) || (x == '.')) {
/* Note: decimal number may start with a period, but must be followed by a digit */
/*
* DecimalLiteral, HexIntegerLiteral, OctalIntegerLiteral
* "pre-parsing", followed by an actual, accurate parser step.
*
* Note: the leading sign character ('+' or '-') is -not- part of
* the production in E5 grammar, and that the a DecimalLiteral
* starting with a '0' must be followed by a non-digit. Leading
* zeroes are syntax errors and must be checked for.
*
* XXX: the two step parsing process is quite awkward, it would
* be more straightforward to allow numconv to parse the longest
* valid prefix (it already does that, it only needs to indicate
* where the input ended). However, the lexer decodes characters
* using a lookup window, so this is not a trivial change.
*/
/* XXX: because of the final check below (that the literal is not
* followed by a digit), this could maybe be simplified, if we bail
* out early from a leading zero (and if there are no periods etc).
* Maybe too complex.
*/
duk_double_t val;
duk_bool_t int_only = 0;
duk_bool_t allow_hex = 0;
duk_small_int_t state; /* 0=before period/exp,
* 1=after period, before exp
* 2=after exp, allow '+' or '-'
* 3=after exp and exp sign
*/
duk_small_uint_t s2n_flags;
duk_codepoint_t y;
DUK__INITBUFFER(lex_ctx);
y = DUK__L1();
if (x == '0' && (y == 'x' || y == 'X')) {
DUK__APPENDBUFFER(lex_ctx, x);
DUK__APPENDBUFFER(lex_ctx, y);
DUK__ADVANCECHARS(lex_ctx, 2);
int_only = 1;
allow_hex = 1;
#if defined(DUK_USE_OCTAL_SUPPORT)
} else if (!strict_mode && x == '0' && DUK__ISDIGIT(y)) {
/* Note: if DecimalLiteral starts with a '0', it can only be
* followed by a period or an exponent indicator which starts
* with 'e' or 'E'. Hence the if-check above ensures that
* OctalIntegerLiteral is the only valid NumericLiteral
* alternative at this point (even if y is, say, '9').
*/
DUK__APPENDBUFFER(lex_ctx, x);
DUK__ADVANCECHARS(lex_ctx, 1);
int_only = 1;
#endif
}
state = 0;
for (;;) {
x = DUK__L0(); /* re-lookup curr char on first round */
if (DUK__ISDIGIT(x)) {
/* Note: intentionally allow leading zeroes here, as the
* actual parser will check for them.
*/
if (state == 2) {
state = 3;
}
} else if (allow_hex && DUK__ISHEXDIGIT(x)) {
/* Note: 'e' and 'E' are also accepted here. */
;
} else if (x == '.') {
if (state >= 1 || int_only) {
break;
} else {
state = 1;
}
} else if (x == 'e' || x == 'E') {
if (state >= 2 || int_only) {
break;
} else {
state = 2;
}
} else if (x == '-' || x == '+') {
if (state != 2) {
break;
} else {
state = 3;
}
} else {
break;
}
DUK__APPENDBUFFER(lex_ctx, x);
DUK__ADVANCECHARS(lex_ctx, 1);
}
/* XXX: better coercion */
duk__internbuffer(lex_ctx, lex_ctx->slot1_idx);
s2n_flags = DUK_S2N_FLAG_ALLOW_EXP |
DUK_S2N_FLAG_ALLOW_FRAC |
DUK_S2N_FLAG_ALLOW_NAKED_FRAC |
DUK_S2N_FLAG_ALLOW_EMPTY_FRAC |
#if defined(DUK_USE_OCTAL_SUPPORT)
(strict_mode ? 0 : DUK_S2N_FLAG_ALLOW_AUTO_OCT_INT) |
#endif
DUK_S2N_FLAG_ALLOW_AUTO_HEX_INT;
duk_dup((duk_context *) lex_ctx->thr, lex_ctx->slot1_idx);
duk_numconv_parse((duk_context *) lex_ctx->thr, 10 /*radix*/, s2n_flags);
val = duk_to_number((duk_context *) lex_ctx->thr, -1);
if (DUK_ISNAN(val)) {
DUK_ERROR_SYNTAX(lex_ctx->thr, "invalid numeric literal");
}
duk_replace((duk_context *) lex_ctx->thr, lex_ctx->slot1_idx); /* could also just pop? */
DUK__INITBUFFER(lex_ctx); /* free some memory */
/* Section 7.8.3 (note): NumericLiteral must be followed by something other than
* IdentifierStart or DecimalDigit.
*/
if (DUK__ISDIGIT(DUK__L0()) || duk_unicode_is_identifier_start(DUK__L0())) {
DUK_ERROR_SYNTAX(lex_ctx->thr, "invalid numeric literal");
}
out_token->num = val;
advtok = DUK__ADVTOK(0, DUK_TOK_NUMBER);
} else if (duk_unicode_is_whitespace(DUK__LOOKUP(lex_ctx, 0))) {
DUK__ADVANCECHARS(lex_ctx, 1);
goto restart;
} else if (x < 0) {
advtok = DUK__ADVTOK(0, DUK_TOK_EOF);
} else {
DUK_ERROR_SYNTAX(lex_ctx->thr, "invalid token");
}
skip_slow_path:
/*
* Shared exit path
*/
DUK__ADVANCEBYTES(lex_ctx, advtok >> 8);
out_token->t = advtok & 0xff;
if (out_token->t_nores < 0) {
out_token->t_nores = out_token->t;
}
out_token->lineterm = got_lineterm;
/* Automatic semicolon insertion is allowed if a token is preceded
* by line terminator(s), or terminates a statement list (right curly
* or EOF).
*/
if (got_lineterm || out_token->t == DUK_TOK_RCURLY || out_token->t == DUK_TOK_EOF) {
out_token->allow_auto_semi = 1;
} else {
out_token->allow_auto_semi = 0;
}
}
#if defined(DUK_USE_REGEXP_SUPPORT)
/*
* Parse a RegExp token. The grammar is described in E5 Section 15.10.
* Terminal constructions (such as quantifiers) are parsed directly here.
*
* 0xffffffffU is used as a marker for "infinity" in quantifiers. Further,
* DUK__MAX_RE_QUANT_DIGITS limits the maximum number of digits that
* will be accepted for a quantifier.
*/
DUK_INTERNAL void duk_lexer_parse_re_token(duk_lexer_ctx *lex_ctx, duk_re_token *out_token) {
duk_small_int_t advtok = 0; /* init is unnecessary but suppresses "may be used uninitialized" warnings */
duk_codepoint_t x, y;
if (++lex_ctx->token_count >= lex_ctx->token_limit) {
DUK_ERROR_RANGE(lex_ctx->thr, "token limit");
return; /* unreachable */
}
DUK_MEMZERO(out_token, sizeof(*out_token));
x = DUK__L0();
y = DUK__L1();
DUK_DDD(DUK_DDDPRINT("parsing regexp token, L0=%ld, L1=%ld", (long) x, (long) y));
switch (x) {
case '|': {
advtok = DUK__ADVTOK(1, DUK_RETOK_DISJUNCTION);
break;
}
case '^': {
advtok = DUK__ADVTOK(1, DUK_RETOK_ASSERT_START);
break;
}
case '$': {
advtok = DUK__ADVTOK(1, DUK_RETOK_ASSERT_END);
break;
}
case '?': {
out_token->qmin = 0;
out_token->qmax = 1;
if (y == '?') {
advtok = DUK__ADVTOK(2, DUK_RETOK_QUANTIFIER);
out_token->greedy = 0;
} else {
advtok = DUK__ADVTOK(1, DUK_RETOK_QUANTIFIER);
out_token->greedy = 1;
}
break;
}
case '*': {
out_token->qmin = 0;
out_token->qmax = DUK_RE_QUANTIFIER_INFINITE;
if (y == '?') {
advtok = DUK__ADVTOK(2, DUK_RETOK_QUANTIFIER);
out_token->greedy = 0;
} else {
advtok = DUK__ADVTOK(1, DUK_RETOK_QUANTIFIER);
out_token->greedy = 1;
}
break;
}
case '+': {
out_token->qmin = 1;
out_token->qmax = DUK_RE_QUANTIFIER_INFINITE;
if (y == '?') {
advtok = DUK__ADVTOK(2, DUK_RETOK_QUANTIFIER);
out_token->greedy = 0;
} else {
advtok = DUK__ADVTOK(1, DUK_RETOK_QUANTIFIER);
out_token->greedy = 1;
}
break;
}
case '{': {
/* Production allows 'DecimalDigits', including leading zeroes */
duk_uint_fast32_t val1 = 0;
duk_uint_fast32_t val2 = DUK_RE_QUANTIFIER_INFINITE;
duk_small_int_t digits = 0;
#if defined(DUK_USE_ES6_REGEXP_BRACES)
duk_lexer_point lex_pt;
#endif
#if defined(DUK_USE_ES6_REGEXP_BRACES)
/* Store lexer position, restoring if quantifier is invalid. */
DUK_LEXER_GETPOINT(lex_ctx, &lex_pt);
#endif
for (;;) {
DUK__ADVANCECHARS(lex_ctx, 1); /* eat '{' on entry */
x = DUK__L0();
if (DUK__ISDIGIT(x)) {
digits++;
val1 = val1 * 10 + (duk_uint_fast32_t) duk__hexval(lex_ctx, x);
} else if (x == ',') {
if (digits > DUK__MAX_RE_QUANT_DIGITS) {
goto invalid_quantifier;
}
if (val2 != DUK_RE_QUANTIFIER_INFINITE) {
goto invalid_quantifier;
}
if (DUK__L1() == '}') {
/* form: { DecimalDigits , }, val1 = min count */
if (digits == 0) {
goto invalid_quantifier;
}
out_token->qmin = val1;
out_token->qmax = DUK_RE_QUANTIFIER_INFINITE;
DUK__ADVANCECHARS(lex_ctx, 2);
break;
}
val2 = val1;
val1 = 0;
digits = 0; /* not strictly necessary because of lookahead '}' above */
} else if (x == '}') {
if (digits > DUK__MAX_RE_QUANT_DIGITS) {
goto invalid_quantifier;
}
if (digits == 0) {
goto invalid_quantifier;
}
if (val2 != DUK_RE_QUANTIFIER_INFINITE) {
/* val2 = min count, val1 = max count */
out_token->qmin = val2;
out_token->qmax = val1;
} else {
/* val1 = count */
out_token->qmin = val1;
out_token->qmax = val1;
}
DUK__ADVANCECHARS(lex_ctx, 1);
break;
} else {
goto invalid_quantifier;
}
}
if (DUK__L0() == '?') {
out_token->greedy = 0;
DUK__ADVANCECHARS(lex_ctx, 1);
} else {
out_token->greedy = 1;
}
advtok = DUK__ADVTOK(0, DUK_RETOK_QUANTIFIER);
break;
invalid_quantifier:
#if defined(DUK_USE_ES6_REGEXP_BRACES)
/* Failed to match the quantifier, restore lexer and parse
* opening brace as a literal.
*/
DUK_LEXER_SETPOINT(lex_ctx, &lex_pt);
advtok = DUK__ADVTOK(1, DUK_RETOK_ATOM_CHAR);
out_token->num = '{';
#else
DUK_ERROR_SYNTAX(lex_ctx->thr, "invalid regexp quantifier");
#endif
break;
}
case '.': {
advtok = DUK__ADVTOK(1, DUK_RETOK_ATOM_PERIOD);
break;
}
case '\\': {
/* The E5.1 specification does not seem to allow IdentifierPart characters
* to be used as identity escapes. Unfortunately this includes '$', which
* cannot be escaped as '\$'; it needs to be escaped e.g. as '\u0024'.
* Many other implementations (including V8 and Rhino, for instance) do
* accept '\$' as a valid identity escape, which is quite pragmatic.
* See: test-regexp-identity-escape-dollar.js.
*/
advtok = DUK__ADVTOK(2, DUK_RETOK_ATOM_CHAR); /* default: char escape (two chars) */
if (y == 'b') {
advtok = DUK__ADVTOK(2, DUK_RETOK_ASSERT_WORD_BOUNDARY);
} else if (y == 'B') {
advtok = DUK__ADVTOK(2, DUK_RETOK_ASSERT_NOT_WORD_BOUNDARY);
} else if (y == 'f') {
out_token->num = 0x000c;
} else if (y == 'n') {
out_token->num = 0x000a;
} else if (y == 't') {
out_token->num = 0x0009;
} else if (y == 'r') {
out_token->num = 0x000d;
} else if (y == 'v') {
out_token->num = 0x000b;
} else if (y == 'c') {
x = DUK__L2();
if ((x >= 'a' && x <= 'z') ||
(x >= 'A' && x <= 'Z')) {
out_token->num = (x % 32);
advtok = DUK__ADVTOK(3, DUK_RETOK_ATOM_CHAR);
} else {
DUK_ERROR_SYNTAX(lex_ctx->thr, "invalid regexp escape");
}
} else if (y == 'x') {
out_token->num = duk__decode_hexesc_from_window(lex_ctx, 2);
advtok = DUK__ADVTOK(4, DUK_RETOK_ATOM_CHAR);
} else if (y == 'u') {
out_token->num = duk__decode_uniesc_from_window(lex_ctx, 2);
advtok = DUK__ADVTOK(6, DUK_RETOK_ATOM_CHAR);
} else if (y == 'd') {
advtok = DUK__ADVTOK(2, DUK_RETOK_ATOM_DIGIT);
} else if (y == 'D') {
advtok = DUK__ADVTOK(2, DUK_RETOK_ATOM_NOT_DIGIT);
} else if (y == 's') {
advtok = DUK__ADVTOK(2, DUK_RETOK_ATOM_WHITE);
} else if (y == 'S') {
advtok = DUK__ADVTOK(2, DUK_RETOK_ATOM_NOT_WHITE);
} else if (y == 'w') {
advtok = DUK__ADVTOK(2, DUK_RETOK_ATOM_WORD_CHAR);
} else if (y == 'W') {
advtok = DUK__ADVTOK(2, DUK_RETOK_ATOM_NOT_WORD_CHAR);
} else if (DUK__ISDIGIT(y)) {
/* E5 Section 15.10.2.11 */
if (y == '0') {
if (DUK__ISDIGIT(DUK__L2())) {
DUK_ERROR_SYNTAX(lex_ctx->thr, "invalid regexp escape");
}
out_token->num = 0x0000;
advtok = DUK__ADVTOK(2, DUK_RETOK_ATOM_CHAR);
} else {
/* XXX: shared parsing? */
duk_uint_fast32_t val = 0;
duk_small_int_t i;
for (i = 0; ; i++) {
if (i >= DUK__MAX_RE_DECESC_DIGITS) {
DUK_ERROR_SYNTAX(lex_ctx->thr, "invalid regexp escape");
}
DUK__ADVANCECHARS(lex_ctx, 1); /* eat backslash on entry */
x = DUK__L0();
if (!DUK__ISDIGIT(x)) {
break;
}
val = val * 10 + (duk_uint_fast32_t) duk__hexval(lex_ctx, x);
}
/* DUK__L0() cannot be a digit, because the loop doesn't terminate if it is */
advtok = DUK__ADVTOK(0, DUK_RETOK_ATOM_BACKREFERENCE);
out_token->num = val;
}
} else if ((y >= 0 && !duk_unicode_is_identifier_part(y)) ||
#if defined(DUK_USE_NONSTD_REGEXP_DOLLAR_ESCAPE)
y == '$' ||
#endif
y == DUK_UNICODE_CP_ZWNJ ||
y == DUK_UNICODE_CP_ZWJ) {
/* IdentityEscape, with dollar added as a valid additional
* non-standard escape (see test-regexp-identity-escape-dollar.js).
* Careful not to match end-of-buffer (<0) here.
*/
out_token->num = y;
} else {
DUK_ERROR_SYNTAX(lex_ctx->thr, "invalid regexp escape");
}
break;
}
case '(': {
/* XXX: naming is inconsistent: ATOM_END_GROUP ends an ASSERT_START_LOOKAHEAD */
if (y == '?') {
if (DUK__L2() == '=') {
/* (?= */
advtok = DUK__ADVTOK(3, DUK_RETOK_ASSERT_START_POS_LOOKAHEAD);
} else if (DUK__L2() == '!') {
/* (?! */
advtok = DUK__ADVTOK(3, DUK_RETOK_ASSERT_START_NEG_LOOKAHEAD);
} else if (DUK__L2() == ':') {
/* (?: */
advtok = DUK__ADVTOK(3, DUK_RETOK_ATOM_START_NONCAPTURE_GROUP);
}
} else {
/* ( */
advtok = DUK__ADVTOK(1, DUK_RETOK_ATOM_START_CAPTURE_GROUP);
}
break;
}
case ')': {
advtok = DUK__ADVTOK(1, DUK_RETOK_ATOM_END_GROUP);
break;
}
case '[': {
/*
* To avoid creating a heavy intermediate value for the list of ranges,
* only the start token ('[' or '[^') is parsed here. The regexp
* compiler parses the ranges itself.
*/
advtok = DUK__ADVTOK(1, DUK_RETOK_ATOM_START_CHARCLASS);
if (y == '^') {
advtok = DUK__ADVTOK(2, DUK_RETOK_ATOM_START_CHARCLASS_INVERTED);
}
break;
}
#if !defined(DUK_USE_ES6_REGEXP_BRACES)
case '}':
#endif
case ']': {
/* Although these could be parsed as PatternCharacters unambiguously (here),
* E5 Section 15.10.1 grammar explicitly forbids these as PatternCharacters.
*/
DUK_ERROR_SYNTAX(lex_ctx->thr, "invalid regexp character");
break;
}
case -1: {
/* EOF */
advtok = DUK__ADVTOK(0, DUK_TOK_EOF);
break;
}
default: {
/* PatternCharacter, all excluded characters are matched by cases above */
advtok = DUK__ADVTOK(1, DUK_RETOK_ATOM_CHAR);
out_token->num = x;
break;
}
}
/*
* Shared exit path
*/
DUK__ADVANCEBYTES(lex_ctx, advtok >> 8);
out_token->t = advtok & 0xff;
}
/*
* Special parser for character classes; calls callback for every
* range parsed and returns the number of ranges present.
*/
/* XXX: this duplicates functionality in duk_regexp.c where a similar loop is
* required anyway. We could use that BUT we need to update the regexp compiler
* 'nranges' too. Work this out a bit more cleanly to save space.
*/
/* XXX: the handling of character range detection is a bit convoluted.
* Try to simplify and make smaller.
*/
/* XXX: logic for handling character ranges is now incorrect, it will accept
* e.g. [\d-z] whereas it should croak from it? SMJS accepts this too, though.
*
* Needs a read through and a lot of additional tests.
*/
DUK_LOCAL
void duk__emit_u16_direct_ranges(duk_lexer_ctx *lex_ctx,
duk_re_range_callback gen_range,
void *userdata,
const duk_uint16_t *ranges,
duk_small_int_t num) {
const duk_uint16_t *ranges_end;
DUK_UNREF(lex_ctx);
ranges_end = ranges + num;
while (ranges < ranges_end) {
/* mark range 'direct', bypass canonicalization (see Wiki) */
gen_range(userdata, (duk_codepoint_t) ranges[0], (duk_codepoint_t) ranges[1], 1);
ranges += 2;
}
}
DUK_INTERNAL void duk_lexer_parse_re_ranges(duk_lexer_ctx *lex_ctx, duk_re_range_callback gen_range, void *userdata) {
duk_codepoint_t start = -1;
duk_codepoint_t ch;
duk_codepoint_t x;
duk_bool_t dash = 0;
DUK_DD(DUK_DDPRINT("parsing regexp ranges"));
for (;;) {
x = DUK__L0();
DUK__ADVANCECHARS(lex_ctx, 1);
ch = -1; /* not strictly necessary, but avoids "uninitialized variable" warnings */
DUK_UNREF(ch);
if (x < 0) {
DUK_ERROR_SYNTAX(lex_ctx->thr, "eof in character class");
} else if (x == ']') {
DUK_ASSERT(!dash); /* lookup should prevent this */
if (start >= 0) {
gen_range(userdata, start, start, 0);
}
break;
} else if (x == '-') {
if (start >= 0 && !dash && DUK__L0() != ']') {
/* '-' as a range indicator */
dash = 1;
continue;
} else {
/* '-' verbatim */
ch = x;
}
} else if (x == '\\') {
/*
* The escapes are same as outside a character class, except that \b has a
* different meaning, and \B and backreferences are prohibited (see E5
* Section 15.10.2.19). However, it's difficult to share code because we
* handle e.g. "\n" very differently: here we generate a single character
* range for it.
*/
x = DUK__L0();
DUK__ADVANCECHARS(lex_ctx, 1);
if (x == 'b') {
/* Note: '\b' in char class is different than outside (assertion),
* '\B' is not allowed and is caught by the duk_unicode_is_identifier_part()
* check below.
*/
ch = 0x0008;
} else if (x == 'f') {
ch = 0x000c;
} else if (x == 'n') {
ch = 0x000a;
} else if (x == 't') {
ch = 0x0009;
} else if (x == 'r') {
ch = 0x000d;
} else if (x == 'v') {
ch = 0x000b;
} else if (x == 'c') {
x = DUK__L0();
DUK__ADVANCECHARS(lex_ctx, 1);
if ((x >= 'a' && x <= 'z') ||
(x >= 'A' && x <= 'Z')) {
ch = (x % 32);
} else {
DUK_ERROR_SYNTAX(lex_ctx->thr, "invalid regexp escape");
return; /* never reached, but avoids warnings of
* potentially unused variables.
*/
}
} else if (x == 'x') {
ch = duk__decode_hexesc_from_window(lex_ctx, 0);
DUK__ADVANCECHARS(lex_ctx, 2);
} else if (x == 'u') {
ch = duk__decode_uniesc_from_window(lex_ctx, 0);
DUK__ADVANCECHARS(lex_ctx, 4);
} else if (x == 'd') {
duk__emit_u16_direct_ranges(lex_ctx,
gen_range,
userdata,
duk_unicode_re_ranges_digit,
sizeof(duk_unicode_re_ranges_digit) / sizeof(duk_uint16_t));
ch = -1;
} else if (x == 'D') {
duk__emit_u16_direct_ranges(lex_ctx,
gen_range,
userdata,
duk_unicode_re_ranges_not_digit,
sizeof(duk_unicode_re_ranges_not_digit) / sizeof(duk_uint16_t));
ch = -1;
} else if (x == 's') {
duk__emit_u16_direct_ranges(lex_ctx,
gen_range,
userdata,
duk_unicode_re_ranges_white,
sizeof(duk_unicode_re_ranges_white) / sizeof(duk_uint16_t));
ch = -1;
} else if (x == 'S') {
duk__emit_u16_direct_ranges(lex_ctx,
gen_range,
userdata,
duk_unicode_re_ranges_not_white,
sizeof(duk_unicode_re_ranges_not_white) / sizeof(duk_uint16_t));
ch = -1;
} else if (x == 'w') {
duk__emit_u16_direct_ranges(lex_ctx,
gen_range,
userdata,
duk_unicode_re_ranges_wordchar,
sizeof(duk_unicode_re_ranges_wordchar) / sizeof(duk_uint16_t));
ch = -1;
} else if (x == 'W') {
duk__emit_u16_direct_ranges(lex_ctx,
gen_range,
userdata,
duk_unicode_re_ranges_not_wordchar,
sizeof(duk_unicode_re_ranges_not_wordchar) / sizeof(duk_uint16_t));
ch = -1;
} else if (DUK__ISDIGIT(x)) {
/* DecimalEscape, only \0 is allowed, no leading zeroes are allowed */
if (x == '0' && !DUK__ISDIGIT(DUK__L0())) {
ch = 0x0000;
} else {
DUK_ERROR_SYNTAX(lex_ctx->thr, "invalid regexp escape");
}
} else if (!duk_unicode_is_identifier_part(x)
#if defined(DUK_USE_NONSTD_REGEXP_DOLLAR_ESCAPE)
|| x == '$'
#endif
) {
/* IdentityEscape */
ch = x;
} else {
DUK_ERROR_SYNTAX(lex_ctx->thr, "invalid regexp escape");
}
} else {
/* character represents itself */
ch = x;
}
/* ch is a literal character here or -1 if parsed entity was
* an escape such as "\s".
*/
if (ch < 0) {
/* multi-character sets not allowed as part of ranges, see
* E5 Section 15.10.2.15, abstract operation CharacterRange.
*/
if (start >= 0) {
if (dash) {
DUK_ERROR_SYNTAX(lex_ctx->thr, "invalid range");
} else {
gen_range(userdata, start, start, 0);
start = -1;
/* dash is already 0 */
}
}
} else {
if (start >= 0) {
if (dash) {
if (start > ch) {
DUK_ERROR_SYNTAX(lex_ctx->thr, "invalid range");
}
gen_range(userdata, start, ch, 0);
start = -1;
dash = 0;
} else {
gen_range(userdata, start, start, 0);
start = ch;
/* dash is already 0 */
}
} else {
start = ch;
}
}
}
return;
}
#endif /* DUK_USE_REGEXP_SUPPORT */
#line 1 "duk_numconv.c"
/*
* Number-to-string and string-to-number conversions.
*
* Slow path number-to-string and string-to-number conversion is based on
* a Dragon4 variant, with fast paths for small integers. Big integer
* arithmetic is needed for guaranteeing that the conversion is correct
* and uses a minimum number of digits. The big number arithmetic has a
* fixed maximum size and does not require dynamic allocations.
*
* See: doc/number-conversion.rst.
*/
/* include removed: duk_internal.h */
#define DUK__IEEE_DOUBLE_EXP_BIAS 1023
#define DUK__IEEE_DOUBLE_EXP_MIN (-1022) /* biased exp == 0 -> denormal, exp -1022 */
#define DUK__DIGITCHAR(x) duk_lc_digits[(x)]
/*
* Tables generated with src/gennumdigits.py.
*
* duk__str2num_digits_for_radix indicates, for each radix, how many input
* digits should be considered significant for string-to-number conversion.
* The input is also padded to this many digits to give the Dragon4
* conversion enough (apparent) precision to work with.
*
* duk__str2num_exp_limits indicates, for each radix, the radix-specific
* minimum/maximum exponent values (for a Dragon4 integer mantissa)
* below and above which the number is guaranteed to underflow to zero
* or overflow to Infinity. This allows parsing to keep bigint values
* bounded.
*/
DUK_LOCAL const duk_uint8_t duk__str2num_digits_for_radix[] = {
69, 44, 35, 30, 27, 25, 23, 22, 20, 20, /* 2 to 11 */
20, 19, 19, 18, 18, 17, 17, 17, 16, 16, /* 12 to 21 */
16, 16, 16, 15, 15, 15, 15, 15, 15, 14, /* 22 to 31 */
14, 14, 14, 14, 14 /* 31 to 36 */
};
typedef struct {
duk_int16_t upper;
duk_int16_t lower;
} duk__exp_limits;
DUK_LOCAL const duk__exp_limits duk__str2num_exp_limits[] = {
{ 957, -1147 }, { 605, -725 }, { 479, -575 }, { 414, -496 },
{ 372, -446 }, { 342, -411 }, { 321, -384 }, { 304, -364 },
{ 291, -346 }, { 279, -334 }, { 268, -323 }, { 260, -312 },
{ 252, -304 }, { 247, -296 }, { 240, -289 }, { 236, -283 },
{ 231, -278 }, { 227, -273 }, { 223, -267 }, { 220, -263 },
{ 216, -260 }, { 213, -256 }, { 210, -253 }, { 208, -249 },
{ 205, -246 }, { 203, -244 }, { 201, -241 }, { 198, -239 },
{ 196, -237 }, { 195, -234 }, { 193, -232 }, { 191, -230 },
{ 190, -228 }, { 188, -226 }, { 187, -225 },
};
/*
* Limited functionality bigint implementation.
*
* Restricted to non-negative numbers with less than 32 * DUK__BI_MAX_PARTS bits,
* with the caller responsible for ensuring this is never exceeded. No memory
* allocation (except stack) is needed for bigint computation. Operations
* have been tailored for number conversion needs.
*
* Argument order is "assignment order", i.e. target first, then arguments:
* x <- y * z --> duk__bi_mul(x, y, z);
*/
/* This upper value has been experimentally determined; debug build will check
* bigint size with assertions.
*/
#define DUK__BI_MAX_PARTS 37 /* 37x32 = 1184 bits */
#ifdef DUK_USE_DDDPRINT
#define DUK__BI_PRINT(name,x) duk__bi_print((name),(x))
#else
#define DUK__BI_PRINT(name,x)
#endif
/* Current size is about 152 bytes. */
typedef struct {
duk_small_int_t n;
duk_uint32_t v[DUK__BI_MAX_PARTS]; /* low to high */
} duk__bigint;
#ifdef DUK_USE_DDDPRINT
DUK_LOCAL void duk__bi_print(const char *name, duk__bigint *x) {
/* Overestimate required size; debug code so not critical to be tight. */
char buf[DUK__BI_MAX_PARTS * 9 + 64];
char *p = buf;
duk_small_int_t i;
/* No NUL term checks in this debug code. */
p += DUK_SPRINTF(p, "%p n=%ld", (void *) x, (long) x->n);
if (x->n == 0) {
p += DUK_SPRINTF(p, " 0");
}
for (i = x->n - 1; i >= 0; i--) {
p += DUK_SPRINTF(p, " %08lx", (unsigned long) x->v[i]);
}
DUK_DDD(DUK_DDDPRINT("%s: %s", (const char *) name, (const char *) buf));
}
#endif
#ifdef DUK_USE_ASSERTIONS
DUK_LOCAL duk_small_int_t duk__bi_is_valid(duk__bigint *x) {
return (duk_small_int_t)
( ((x->n >= 0) && (x->n <= DUK__BI_MAX_PARTS)) /* is valid size */ &&
((x->n == 0) || (x->v[x->n - 1] != 0)) /* is normalized */ );
}
#endif
DUK_LOCAL void duk__bi_normalize(duk__bigint *x) {
duk_small_int_t i;
for (i = x->n - 1; i >= 0; i--) {
if (x->v[i] != 0) {
break;
}
}
/* Note: if 'x' is zero, x->n becomes 0 here */
x->n = i + 1;
DUK_ASSERT(duk__bi_is_valid(x));
}
/* x <- y */
DUK_LOCAL void duk__bi_copy(duk__bigint *x, duk__bigint *y) {
duk_small_int_t n;
n = y->n;
x->n = n;
if (n == 0) {
return;
}
DUK_MEMCPY((void *) x->v, (const void *) y->v, (size_t) (sizeof(duk_uint32_t) * n));
}
DUK_LOCAL void duk__bi_set_small(duk__bigint *x, duk_uint32_t v) {
if (v == 0U) {
x->n = 0;
} else {
x->n = 1;
x->v[0] = v;
}
DUK_ASSERT(duk__bi_is_valid(x));
}
/* Return value: <0 <=> x < y
* 0 <=> x == y
* >0 <=> x > y
*/
DUK_LOCAL int duk__bi_compare(duk__bigint *x, duk__bigint *y) {
duk_small_int_t i, nx, ny;
duk_uint32_t tx, ty;
DUK_ASSERT(duk__bi_is_valid(x));
DUK_ASSERT(duk__bi_is_valid(y));
nx = x->n;
ny = y->n;
if (nx > ny) {
goto ret_gt;
}
if (nx < ny) {
goto ret_lt;
}
for (i = nx - 1; i >= 0; i--) {
tx = x->v[i];
ty = y->v[i];
if (tx > ty) {
goto ret_gt;
}
if (tx < ty) {
goto ret_lt;
}
}
return 0;
ret_gt:
return 1;
ret_lt:
return -1;
}
/* x <- y + z */
#ifdef DUK_USE_64BIT_OPS
DUK_LOCAL void duk__bi_add(duk__bigint *x, duk__bigint *y, duk__bigint *z) {
duk_uint64_t tmp;
duk_small_int_t i, ny, nz;
DUK_ASSERT(duk__bi_is_valid(y));
DUK_ASSERT(duk__bi_is_valid(z));
if (z->n > y->n) {
duk__bigint *t;
t = y; y = z; z = t;
}
DUK_ASSERT(y->n >= z->n);
ny = y->n; nz = z->n;
tmp = 0U;
for (i = 0; i < ny; i++) {
DUK_ASSERT(i < DUK__BI_MAX_PARTS);
tmp += y->v[i];
if (i < nz) {
tmp += z->v[i];
}
x->v[i] = (duk_uint32_t) (tmp & 0xffffffffUL);
tmp = tmp >> 32;
}
if (tmp != 0U) {
DUK_ASSERT(i < DUK__BI_MAX_PARTS);
x->v[i++] = (duk_uint32_t) tmp;
}
x->n = i;
DUK_ASSERT(x->n <= DUK__BI_MAX_PARTS);
/* no need to normalize */
DUK_ASSERT(duk__bi_is_valid(x));
}
#else /* DUK_USE_64BIT_OPS */
DUK_LOCAL void duk__bi_add(duk__bigint *x, duk__bigint *y, duk__bigint *z) {
duk_uint32_t carry, tmp1, tmp2;
duk_small_int_t i, ny, nz;
DUK_ASSERT(duk__bi_is_valid(y));
DUK_ASSERT(duk__bi_is_valid(z));
if (z->n > y->n) {
duk__bigint *t;
t = y; y = z; z = t;
}
DUK_ASSERT(y->n >= z->n);
ny = y->n; nz = z->n;
carry = 0U;
for (i = 0; i < ny; i++) {
/* Carry is detected based on wrapping which relies on exact 32-bit
* types.
*/
DUK_ASSERT(i < DUK__BI_MAX_PARTS);
tmp1 = y->v[i];
tmp2 = tmp1;
if (i < nz) {
tmp2 += z->v[i];
}
/* Careful with carry condition:
* - If carry not added: 0x12345678 + 0 + 0xffffffff = 0x12345677 (< 0x12345678)
* - If carry added: 0x12345678 + 1 + 0xffffffff = 0x12345678 (== 0x12345678)
*/
if (carry) {
tmp2++;
carry = (tmp2 <= tmp1 ? 1U : 0U);
} else {
carry = (tmp2 < tmp1 ? 1U : 0U);
}
x->v[i] = tmp2;
}
if (carry) {
DUK_ASSERT(i < DUK__BI_MAX_PARTS);
DUK_ASSERT(carry == 1U);
x->v[i++] = carry;
}
x->n = i;
DUK_ASSERT(x->n <= DUK__BI_MAX_PARTS);
/* no need to normalize */
DUK_ASSERT(duk__bi_is_valid(x));
}
#endif /* DUK_USE_64BIT_OPS */
/* x <- y + z */
DUK_LOCAL void duk__bi_add_small(duk__bigint *x, duk__bigint *y, duk_uint32_t z) {
duk__bigint tmp;
DUK_ASSERT(duk__bi_is_valid(y));
/* XXX: this could be optimized; there is only one call site now though */
duk__bi_set_small(&tmp, z);
duk__bi_add(x, y, &tmp);
DUK_ASSERT(duk__bi_is_valid(x));
}
#if 0 /* unused */
/* x <- x + y, use t as temp */
DUK_LOCAL void duk__bi_add_copy(duk__bigint *x, duk__bigint *y, duk__bigint *t) {
duk__bi_add(t, x, y);
duk__bi_copy(x, t);
}
#endif
/* x <- y - z, require x >= y => z >= 0, i.e. y >= z */
#ifdef DUK_USE_64BIT_OPS
DUK_LOCAL void duk__bi_sub(duk__bigint *x, duk__bigint *y, duk__bigint *z) {
duk_small_int_t i, ny, nz;
duk_uint32_t ty, tz;
duk_int64_t tmp;
DUK_ASSERT(duk__bi_is_valid(y));
DUK_ASSERT(duk__bi_is_valid(z));
DUK_ASSERT(duk__bi_compare(y, z) >= 0);
DUK_ASSERT(y->n >= z->n);
ny = y->n; nz = z->n;
tmp = 0;
for (i = 0; i < ny; i++) {
ty = y->v[i];
if (i < nz) {
tz = z->v[i];
} else {
tz = 0;
}
tmp = (duk_int64_t) ty - (duk_int64_t) tz + tmp;
x->v[i] = (duk_uint32_t) (tmp & 0xffffffffUL);
tmp = tmp >> 32; /* 0 or -1 */
}
DUK_ASSERT(tmp == 0);
x->n = i;
duk__bi_normalize(x); /* need to normalize, may even cancel to 0 */
DUK_ASSERT(duk__bi_is_valid(x));
}
#else
DUK_LOCAL void duk__bi_sub(duk__bigint *x, duk__bigint *y, duk__bigint *z) {
duk_small_int_t i, ny, nz;
duk_uint32_t tmp1, tmp2, borrow;
DUK_ASSERT(duk__bi_is_valid(y));
DUK_ASSERT(duk__bi_is_valid(z));
DUK_ASSERT(duk__bi_compare(y, z) >= 0);
DUK_ASSERT(y->n >= z->n);
ny = y->n; nz = z->n;
borrow = 0U;
for (i = 0; i < ny; i++) {
/* Borrow is detected based on wrapping which relies on exact 32-bit
* types.
*/
tmp1 = y->v[i];
tmp2 = tmp1;
if (i < nz) {
tmp2 -= z->v[i];
}
/* Careful with borrow condition:
* - If borrow not subtracted: 0x12345678 - 0 - 0xffffffff = 0x12345679 (> 0x12345678)
* - If borrow subtracted: 0x12345678 - 1 - 0xffffffff = 0x12345678 (== 0x12345678)
*/
if (borrow) {
tmp2--;
borrow = (tmp2 >= tmp1 ? 1U : 0U);
} else {
borrow = (tmp2 > tmp1 ? 1U : 0U);
}
x->v[i] = tmp2;
}
DUK_ASSERT(borrow == 0U);
x->n = i;
duk__bi_normalize(x); /* need to normalize, may even cancel to 0 */
DUK_ASSERT(duk__bi_is_valid(x));
}
#endif
#if 0 /* unused */
/* x <- y - z */
DUK_LOCAL void duk__bi_sub_small(duk__bigint *x, duk__bigint *y, duk_uint32_t z) {
duk__bigint tmp;
DUK_ASSERT(duk__bi_is_valid(y));
/* XXX: this could be optimized */
duk__bi_set_small(&tmp, z);
duk__bi_sub(x, y, &tmp);
DUK_ASSERT(duk__bi_is_valid(x));
}
#endif
/* x <- x - y, use t as temp */
DUK_LOCAL void duk__bi_sub_copy(duk__bigint *x, duk__bigint *y, duk__bigint *t) {
duk__bi_sub(t, x, y);
duk__bi_copy(x, t);
}
/* x <- y * z */
DUK_LOCAL void duk__bi_mul(duk__bigint *x, duk__bigint *y, duk__bigint *z) {
duk_small_int_t i, j, nx, nz;
DUK_ASSERT(duk__bi_is_valid(y));
DUK_ASSERT(duk__bi_is_valid(z));
nx = y->n + z->n; /* max possible */
DUK_ASSERT(nx <= DUK__BI_MAX_PARTS);
if (nx == 0) {
/* Both inputs are zero; cases where only one is zero can go
* through main algorithm.
*/
x->n = 0;
return;
}
DUK_MEMZERO((void *) x->v, (size_t) (sizeof(duk_uint32_t) * nx));
x->n = nx;
nz = z->n;
for (i = 0; i < y->n; i++) {
#ifdef DUK_USE_64BIT_OPS
duk_uint64_t tmp = 0U;
for (j = 0; j < nz; j++) {
tmp += (duk_uint64_t) y->v[i] * (duk_uint64_t) z->v[j] + x->v[i+j];
x->v[i+j] = (duk_uint32_t) (tmp & 0xffffffffUL);
tmp = tmp >> 32;
}
if (tmp > 0) {
DUK_ASSERT(i + j < nx);
DUK_ASSERT(i + j < DUK__BI_MAX_PARTS);
DUK_ASSERT(x->v[i+j] == 0U);
x->v[i+j] = (duk_uint32_t) tmp;
}
#else
/*
* Multiply + add + carry for 32-bit components using only 16x16->32
* multiplies and carry detection based on unsigned overflow.
*
* 1st mult, 32-bit: (A*2^16 + B)
* 2nd mult, 32-bit: (C*2^16 + D)
* 3rd add, 32-bit: E
* 4th add, 32-bit: F
*
* (AC*2^16 + B) * (C*2^16 + D) + E + F
* = AC*2^32 + AD*2^16 + BC*2^16 + BD + E + F
* = AC*2^32 + (AD + BC)*2^16 + (BD + E + F)
* = AC*2^32 + AD*2^16 + BC*2^16 + (BD + E + F)
*/
duk_uint32_t a, b, c, d, e, f;
duk_uint32_t r, s, t;
a = y->v[i]; b = a & 0xffffUL; a = a >> 16;
f = 0;
for (j = 0; j < nz; j++) {
c = z->v[j]; d = c & 0xffffUL; c = c >> 16;
e = x->v[i+j];
/* build result as: (r << 32) + s: start with (BD + E + F) */
r = 0;
s = b * d;
/* add E */
t = s + e;
if (t < s) { r++; } /* carry */
s = t;
/* add F */
t = s + f;
if (t < s) { r++; } /* carry */
s = t;
/* add BC*2^16 */
t = b * c;
r += (t >> 16);
t = s + ((t & 0xffffUL) << 16);
if (t < s) { r++; } /* carry */
s = t;
/* add AD*2^16 */
t = a * d;
r += (t >> 16);
t = s + ((t & 0xffffUL) << 16);
if (t < s) { r++; } /* carry */
s = t;
/* add AC*2^32 */
t = a * c;
r += t;
DUK_DDD(DUK_DDDPRINT("ab=%08lx cd=%08lx ef=%08lx -> rs=%08lx %08lx",
(unsigned long) y->v[i], (unsigned long) z->v[j],
(unsigned long) x->v[i+j], (unsigned long) r,
(unsigned long) s));
x->v[i+j] = s;
f = r;
}
if (f > 0U) {
DUK_ASSERT(i + j < nx);
DUK_ASSERT(i + j < DUK__BI_MAX_PARTS);
DUK_ASSERT(x->v[i+j] == 0U);
x->v[i+j] = (duk_uint32_t) f;
}
#endif /* DUK_USE_64BIT_OPS */
}
duk__bi_normalize(x);
DUK_ASSERT(duk__bi_is_valid(x));
}
/* x <- y * z */
DUK_LOCAL void duk__bi_mul_small(duk__bigint *x, duk__bigint *y, duk_uint32_t z) {
duk__bigint tmp;
DUK_ASSERT(duk__bi_is_valid(y));
/* XXX: this could be optimized */
duk__bi_set_small(&tmp, z);
duk__bi_mul(x, y, &tmp);
DUK_ASSERT(duk__bi_is_valid(x));
}
/* x <- x * y, use t as temp */
DUK_LOCAL void duk__bi_mul_copy(duk__bigint *x, duk__bigint *y, duk__bigint *t) {
duk__bi_mul(t, x, y);
duk__bi_copy(x, t);
}
/* x <- x * y, use t as temp */
DUK_LOCAL void duk__bi_mul_small_copy(duk__bigint *x, duk_uint32_t y, duk__bigint *t) {
duk__bi_mul_small(t, x, y);
duk__bi_copy(x, t);
}
DUK_LOCAL int duk__bi_is_even(duk__bigint *x) {
DUK_ASSERT(duk__bi_is_valid(x));
return (x->n == 0) || ((x->v[0] & 0x01) == 0);
}
DUK_LOCAL int duk__bi_is_zero(duk__bigint *x) {
DUK_ASSERT(duk__bi_is_valid(x));
return (x->n == 0); /* this is the case for normalized numbers */
}
/* Bigint is 2^52. Used to detect normalized IEEE double mantissa values
* which are at the lowest edge (next floating point value downwards has
* a different exponent). The lowest mantissa has the form:
*
* 1000........000 (52 zeroes; only "hidden bit" is set)
*/
DUK_LOCAL duk_small_int_t duk__bi_is_2to52(duk__bigint *x) {
DUK_ASSERT(duk__bi_is_valid(x));
return (duk_small_int_t)
(x->n == 2) && (x->v[0] == 0U) && (x->v[1] == (1U << (52-32)));
}
/* x <- (1<<y) */
DUK_LOCAL void duk__bi_twoexp(duk__bigint *x, duk_small_int_t y) {
duk_small_int_t n, r;
n = (y / 32) + 1;
DUK_ASSERT(n > 0);
r = y % 32;
DUK_MEMZERO((void *) x->v, sizeof(duk_uint32_t) * n);
x->n = n;
x->v[n - 1] = (((duk_uint32_t) 1) << r);
}
/* x <- b^y; use t1 and t2 as temps */
DUK_LOCAL void duk__bi_exp_small(duk__bigint *x, duk_small_int_t b, duk_small_int_t y, duk__bigint *t1, duk__bigint *t2) {
/* Fast path the binary case */
DUK_ASSERT(x != t1 && x != t2 && t1 != t2); /* distinct bignums, easy mistake to make */
DUK_ASSERT(b >= 0);
DUK_ASSERT(y >= 0);
if (b == 2) {
duk__bi_twoexp(x, y);
return;
}
/* http://en.wikipedia.org/wiki/Exponentiation_by_squaring */
DUK_DDD(DUK_DDDPRINT("exp_small: b=%ld, y=%ld", (long) b, (long) y));
duk__bi_set_small(x, 1);
duk__bi_set_small(t1, b);
for (;;) {
/* Loop structure ensures that we don't compute t1^2 unnecessarily
* on the final round, as that might create a bignum exceeding the
* current DUK__BI_MAX_PARTS limit.
*/
if (y & 0x01) {
duk__bi_mul_copy(x, t1, t2);
}
y = y >> 1;
if (y == 0) {
break;
}
duk__bi_mul_copy(t1, t1, t2);
}
DUK__BI_PRINT("exp_small result", x);
}
/*
* A Dragon4 number-to-string variant, based on:
*
* Guy L. Steele Jr., Jon L. White: "How to Print Floating-Point Numbers
* Accurately"
*
* Robert G. Burger, R. Kent Dybvig: "Printing Floating-Point Numbers
* Quickly and Accurately"
*
* The current algorithm is based on Figure 1 of the Burger-Dybvig paper,
* i.e. the base implementation without logarithm estimation speedups
* (these would increase code footprint considerably). Fixed-format output
* does not follow the suggestions in the paper; instead, we generate an
* extra digit and round-with-carry.
*
* The same algorithm is used for number parsing (with b=10 and B=2)
* by generating one extra digit and doing rounding manually.
*
* See doc/number-conversion.rst for limitations.
*/
/* Maximum number of digits generated. */
#define DUK__MAX_OUTPUT_DIGITS 1040 /* (Number.MAX_VALUE).toString(2).length == 1024, + spare */
/* Maximum number of characters in formatted value. */
#define DUK__MAX_FORMATTED_LENGTH 1040 /* (-Number.MAX_VALUE).toString(2).length == 1025, + spare */
/* Number and (minimum) size of bigints in the nc_ctx structure. */
#define DUK__NUMCONV_CTX_NUM_BIGINTS 7
#define DUK__NUMCONV_CTX_BIGINTS_SIZE (sizeof(duk__bigint) * DUK__NUMCONV_CTX_NUM_BIGINTS)
typedef struct {
/* Currently about 7*152 = 1064 bytes. The space for these
* duk__bigints is used also as a temporary buffer for generating
* the final string. This is a bit awkard; a union would be
* more correct.
*/
duk__bigint f, r, s, mp, mm, t1, t2;
duk_small_int_t is_s2n; /* if 1, doing a string-to-number; else doing a number-to-string */
duk_small_int_t is_fixed; /* if 1, doing a fixed format output (not free format) */
duk_small_int_t req_digits; /* requested number of output digits; 0 = free-format */
duk_small_int_t abs_pos; /* digit position is absolute, not relative */
duk_small_int_t e; /* exponent for 'f' */
duk_small_int_t b; /* input radix */
duk_small_int_t B; /* output radix */
duk_small_int_t k; /* see algorithm */
duk_small_int_t low_ok; /* see algorithm */
duk_small_int_t high_ok; /* see algorithm */
duk_small_int_t unequal_gaps; /* m+ != m- (very rarely) */
/* Buffer used for generated digits, values are in the range [0,B-1]. */
duk_uint8_t digits[DUK__MAX_OUTPUT_DIGITS];
duk_small_int_t count; /* digit count */
} duk__numconv_stringify_ctx;
/* Note: computes with 'idx' in assertions, so caller beware.
* 'idx' is preincremented, i.e. '1' on first call, because it
* is more convenient for the caller.
*/
#define DUK__DRAGON4_OUTPUT_PREINC(nc_ctx,preinc_idx,x) do { \
DUK_ASSERT((preinc_idx) - 1 >= 0); \
DUK_ASSERT((preinc_idx) - 1 < DUK__MAX_OUTPUT_DIGITS); \
((nc_ctx)->digits[(preinc_idx) - 1]) = (duk_uint8_t) (x); \
} while (0)
DUK_LOCAL duk_size_t duk__dragon4_format_uint32(duk_uint8_t *buf, duk_uint32_t x, duk_small_int_t radix) {
duk_uint8_t *p;
duk_size_t len;
duk_small_int_t dig;
duk_small_int_t t;
DUK_ASSERT(radix >= 2 && radix <= 36);
/* A 32-bit unsigned integer formats to at most 32 digits (the
* worst case happens with radix == 2). Output the digits backwards,
* and use a memmove() to get them in the right place.
*/
p = buf + 32;
for (;;) {
t = x / radix;
dig = x - t * radix;
x = t;
DUK_ASSERT(dig >= 0 && dig < 36);
*(--p) = DUK__DIGITCHAR(dig);
if (x == 0) {
break;
}
}
len = (duk_size_t) ((buf + 32) - p);
DUK_MEMMOVE((void *) buf, (const void *) p, (size_t) len);
return len;
}
DUK_LOCAL void duk__dragon4_prepare(duk__numconv_stringify_ctx *nc_ctx) {
duk_small_int_t lowest_mantissa;
#if 1
/* Assume IEEE round-to-even, so that shorter encoding can be used
* when round-to-even would produce correct result. By removing
* this check (and having low_ok == high_ok == 0) the results would
* still be accurate but in some cases longer than necessary.
*/
if (duk__bi_is_even(&nc_ctx->f)) {
DUK_DDD(DUK_DDDPRINT("f is even"));
nc_ctx->low_ok = 1;
nc_ctx->high_ok = 1;
} else {
DUK_DDD(DUK_DDDPRINT("f is odd"));
nc_ctx->low_ok = 0;
nc_ctx->high_ok = 0;
}
#else
/* Note: not honoring round-to-even should work but now generates incorrect
* results. For instance, 1e23 serializes to "a000...", i.e. the first digit
* equals the radix (10). Scaling stops one step too early in this case.
* Don't know why this is the case, but since this code path is unused, it
* doesn't matter.
*/
nc_ctx->low_ok = 0;
nc_ctx->high_ok = 0;
#endif
/* For string-to-number, pretend we never have the lowest mantissa as there
* is no natural "precision" for inputs. Having lowest_mantissa == 0, we'll
* fall into the base cases for both e >= 0 and e < 0.
*/
if (nc_ctx->is_s2n) {
lowest_mantissa = 0;
} else {
lowest_mantissa = duk__bi_is_2to52(&nc_ctx->f);
}
nc_ctx->unequal_gaps = 0;
if (nc_ctx->e >= 0) {
/* exponent non-negative (and thus not minimum exponent) */
if (lowest_mantissa) {
/* (>= e 0) AND (= f (expt b (- p 1)))
*
* be <- (expt b e) == b^e
* be1 <- (* be b) == (expt b (+ e 1)) == b^(e+1)
* r <- (* f be1 2) == 2 * f * b^(e+1) [if b==2 -> f * b^(e+2)]
* s <- (* b 2) [if b==2 -> 4]
* m+ <- be1 == b^(e+1)
* m- <- be == b^e
* k <- 0
* B <- B
* low_ok <- round
* high_ok <- round
*/
DUK_DDD(DUK_DDDPRINT("non-negative exponent (not smallest exponent); "
"lowest mantissa value for this exponent -> "
"unequal gaps"));
duk__bi_exp_small(&nc_ctx->mm, nc_ctx->b, nc_ctx->e, &nc_ctx->t1, &nc_ctx->t2); /* mm <- b^e */
duk__bi_mul_small(&nc_ctx->mp, &nc_ctx->mm, nc_ctx->b); /* mp <- b^(e+1) */
duk__bi_mul_small(&nc_ctx->t1, &nc_ctx->f, 2);
duk__bi_mul(&nc_ctx->r, &nc_ctx->t1, &nc_ctx->mp); /* r <- (2 * f) * b^(e+1) */
duk__bi_set_small(&nc_ctx->s, nc_ctx->b * 2); /* s <- 2 * b */
nc_ctx->unequal_gaps = 1;
} else {
/* (>= e 0) AND (not (= f (expt b (- p 1))))
*
* be <- (expt b e) == b^e
* r <- (* f be 2) == 2 * f * b^e [if b==2 -> f * b^(e+1)]
* s <- 2
* m+ <- be == b^e
* m- <- be == b^e
* k <- 0
* B <- B
* low_ok <- round
* high_ok <- round
*/
DUK_DDD(DUK_DDDPRINT("non-negative exponent (not smallest exponent); "
"not lowest mantissa for this exponent -> "
"equal gaps"));
duk__bi_exp_small(&nc_ctx->mm, nc_ctx->b, nc_ctx->e, &nc_ctx->t1, &nc_ctx->t2); /* mm <- b^e */
duk__bi_copy(&nc_ctx->mp, &nc_ctx->mm); /* mp <- b^e */
duk__bi_mul_small(&nc_ctx->t1, &nc_ctx->f, 2);
duk__bi_mul(&nc_ctx->r, &nc_ctx->t1, &nc_ctx->mp); /* r <- (2 * f) * b^e */
duk__bi_set_small(&nc_ctx->s, 2); /* s <- 2 */
}
} else {
/* When doing string-to-number, lowest_mantissa is always 0 so
* the exponent check, while incorrect, won't matter.
*/
if (nc_ctx->e > DUK__IEEE_DOUBLE_EXP_MIN /*not minimum exponent*/ &&
lowest_mantissa /* lowest mantissa for this exponent*/) {
/* r <- (* f b 2) [if b==2 -> (* f 4)]
* s <- (* (expt b (- 1 e)) 2) == b^(1-e) * 2 [if b==2 -> b^(2-e)]
* m+ <- b == 2
* m- <- 1
* k <- 0
* B <- B
* low_ok <- round
* high_ok <- round
*/
DUK_DDD(DUK_DDDPRINT("negative exponent; not minimum exponent and "
"lowest mantissa for this exponent -> "
"unequal gaps"));
duk__bi_mul_small(&nc_ctx->r, &nc_ctx->f, nc_ctx->b * 2); /* r <- (2 * b) * f */
duk__bi_exp_small(&nc_ctx->t1, nc_ctx->b, 1 - nc_ctx->e, &nc_ctx->s, &nc_ctx->t2); /* NB: use 's' as temp on purpose */
duk__bi_mul_small(&nc_ctx->s, &nc_ctx->t1, 2); /* s <- b^(1-e) * 2 */
duk__bi_set_small(&nc_ctx->mp, 2);
duk__bi_set_small(&nc_ctx->mm, 1);
nc_ctx->unequal_gaps = 1;
} else {
/* r <- (* f 2)
* s <- (* (expt b (- e)) 2) == b^(-e) * 2 [if b==2 -> b^(1-e)]
* m+ <- 1
* m- <- 1
* k <- 0
* B <- B
* low_ok <- round
* high_ok <- round
*/
DUK_DDD(DUK_DDDPRINT("negative exponent; minimum exponent or not "
"lowest mantissa for this exponent -> "
"equal gaps"));
duk__bi_mul_small(&nc_ctx->r, &nc_ctx->f, 2); /* r <- 2 * f */
duk__bi_exp_small(&nc_ctx->t1, nc_ctx->b, -nc_ctx->e, &nc_ctx->s, &nc_ctx->t2); /* NB: use 's' as temp on purpose */
duk__bi_mul_small(&nc_ctx->s, &nc_ctx->t1, 2); /* s <- b^(-e) * 2 */
duk__bi_set_small(&nc_ctx->mp, 1);
duk__bi_set_small(&nc_ctx->mm, 1);
}
}
}
DUK_LOCAL void duk__dragon4_scale(duk__numconv_stringify_ctx *nc_ctx) {
duk_small_int_t k = 0;
/* This is essentially the 'scale' algorithm, with recursion removed.
* Note that 'k' is either correct immediately, or will move in one
* direction in the loop. There's no need to do the low/high checks
* on every round (like the Scheme algorithm does).
*
* The scheme algorithm finds 'k' and updates 's' simultaneously,
* while the logical algorithm finds 'k' with 's' having its initial
* value, after which 's' is updated separately (see the Burger-Dybvig
* paper, Section 3.1, steps 2 and 3).
*
* The case where m+ == m- (almost always) is optimized for, because
* it reduces the bigint operations considerably and almost always
* applies. The scale loop only needs to work with m+, so this works.
*/
/* XXX: this algorithm could be optimized quite a lot by using e.g.
* a logarithm based estimator for 'k' and performing B^n multiplication
* using a lookup table or using some bit-representation based exp
* algorithm. Currently we just loop, with significant performance
* impact for very large and very small numbers.
*/
DUK_DDD(DUK_DDDPRINT("scale: B=%ld, low_ok=%ld, high_ok=%ld",
(long) nc_ctx->B, (long) nc_ctx->low_ok, (long) nc_ctx->high_ok));
DUK__BI_PRINT("r(init)", &nc_ctx->r);
DUK__BI_PRINT("s(init)", &nc_ctx->s);
DUK__BI_PRINT("mp(init)", &nc_ctx->mp);
DUK__BI_PRINT("mm(init)", &nc_ctx->mm);
for (;;) {
DUK_DDD(DUK_DDDPRINT("scale loop (inc k), k=%ld", (long) k));
DUK__BI_PRINT("r", &nc_ctx->r);
DUK__BI_PRINT("s", &nc_ctx->s);
DUK__BI_PRINT("m+", &nc_ctx->mp);
DUK__BI_PRINT("m-", &nc_ctx->mm);
duk__bi_add(&nc_ctx->t1, &nc_ctx->r, &nc_ctx->mp); /* t1 = (+ r m+) */
if (duk__bi_compare(&nc_ctx->t1, &nc_ctx->s) >= (nc_ctx->high_ok ? 0 : 1)) {
DUK_DDD(DUK_DDDPRINT("k is too low"));
/* r <- r
* s <- (* s B)
* m+ <- m+
* m- <- m-
* k <- (+ k 1)
*/
duk__bi_mul_small_copy(&nc_ctx->s, nc_ctx->B, &nc_ctx->t1);
k++;
} else {
break;
}
}
/* k > 0 -> k was too low, and cannot be too high */
if (k > 0) {
goto skip_dec_k;
}
for (;;) {
DUK_DDD(DUK_DDDPRINT("scale loop (dec k), k=%ld", (long) k));
DUK__BI_PRINT("r", &nc_ctx->r);
DUK__BI_PRINT("s", &nc_ctx->s);
DUK__BI_PRINT("m+", &nc_ctx->mp);
DUK__BI_PRINT("m-", &nc_ctx->mm);
duk__bi_add(&nc_ctx->t1, &nc_ctx->r, &nc_ctx->mp); /* t1 = (+ r m+) */
duk__bi_mul_small(&nc_ctx->t2, &nc_ctx->t1, nc_ctx->B); /* t2 = (* (+ r m+) B) */
if (duk__bi_compare(&nc_ctx->t2, &nc_ctx->s) <= (nc_ctx->high_ok ? -1 : 0)) {
DUK_DDD(DUK_DDDPRINT("k is too high"));
/* r <- (* r B)
* s <- s
* m+ <- (* m+ B)
* m- <- (* m- B)
* k <- (- k 1)
*/
duk__bi_mul_small_copy(&nc_ctx->r, nc_ctx->B, &nc_ctx->t1);
duk__bi_mul_small_copy(&nc_ctx->mp, nc_ctx->B, &nc_ctx->t1);
if (nc_ctx->unequal_gaps) {
DUK_DDD(DUK_DDDPRINT("m+ != m- -> need to update m- too"));
duk__bi_mul_small_copy(&nc_ctx->mm, nc_ctx->B, &nc_ctx->t1);
}
k--;
} else {
break;
}
}
skip_dec_k:
if (!nc_ctx->unequal_gaps) {
DUK_DDD(DUK_DDDPRINT("equal gaps, copy m- from m+"));
duk__bi_copy(&nc_ctx->mm, &nc_ctx->mp); /* mm <- mp */
}
nc_ctx->k = k;
DUK_DDD(DUK_DDDPRINT("final k: %ld", (long) k));
DUK__BI_PRINT("r(final)", &nc_ctx->r);
DUK__BI_PRINT("s(final)", &nc_ctx->s);
DUK__BI_PRINT("mp(final)", &nc_ctx->mp);
DUK__BI_PRINT("mm(final)", &nc_ctx->mm);
}
DUK_LOCAL void duk__dragon4_generate(duk__numconv_stringify_ctx *nc_ctx) {
duk_small_int_t tc1, tc2; /* terminating conditions */
duk_small_int_t d; /* current digit */
duk_small_int_t count = 0; /* digit count */
/*
* Digit generation loop.
*
* Different termination conditions:
*
* 1. Free format output. Terminate when shortest accurate
* representation found.
*
* 2. Fixed format output, with specific number of digits.
* Ignore termination conditions, terminate when digits
* generated. Caller requests an extra digit and rounds.
*
* 3. Fixed format output, with a specific absolute cut-off
* position (e.g. 10 digits after decimal point). Note
* that we always generate at least one digit, even if
* the digit is below the cut-off point already.
*/
for (;;) {
DUK_DDD(DUK_DDDPRINT("generate loop, count=%ld, k=%ld, B=%ld, low_ok=%ld, high_ok=%ld",
(long) count, (long) nc_ctx->k, (long) nc_ctx->B,
(long) nc_ctx->low_ok, (long) nc_ctx->high_ok));
DUK__BI_PRINT("r", &nc_ctx->r);
DUK__BI_PRINT("s", &nc_ctx->s);
DUK__BI_PRINT("m+", &nc_ctx->mp);
DUK__BI_PRINT("m-", &nc_ctx->mm);
/* (quotient-remainder (* r B) s) using a dummy subtraction loop */
duk__bi_mul_small(&nc_ctx->t1, &nc_ctx->r, nc_ctx->B); /* t1 <- (* r B) */
d = 0;
for (;;) {
if (duk__bi_compare(&nc_ctx->t1, &nc_ctx->s) < 0) {
break;
}
duk__bi_sub_copy(&nc_ctx->t1, &nc_ctx->s, &nc_ctx->t2); /* t1 <- t1 - s */
d++;
}
duk__bi_copy(&nc_ctx->r, &nc_ctx->t1); /* r <- (remainder (* r B) s) */
/* d <- (quotient (* r B) s) (in range 0...B-1) */
DUK_DDD(DUK_DDDPRINT("-> d(quot)=%ld", (long) d));
DUK__BI_PRINT("r(rem)", &nc_ctx->r);
duk__bi_mul_small_copy(&nc_ctx->mp, nc_ctx->B, &nc_ctx->t2); /* m+ <- (* m+ B) */
duk__bi_mul_small_copy(&nc_ctx->mm, nc_ctx->B, &nc_ctx->t2); /* m- <- (* m- B) */
DUK__BI_PRINT("mp(upd)", &nc_ctx->mp);
DUK__BI_PRINT("mm(upd)", &nc_ctx->mm);
/* Terminating conditions. For fixed width output, we just ignore the
* terminating conditions (and pretend that tc1 == tc2 == false). The
* the current shortcut for fixed-format output is to generate a few
* extra digits and use rounding (with carry) to finish the output.
*/
if (nc_ctx->is_fixed == 0) {
/* free-form */
tc1 = (duk__bi_compare(&nc_ctx->r, &nc_ctx->mm) <= (nc_ctx->low_ok ? 0 : -1));
duk__bi_add(&nc_ctx->t1, &nc_ctx->r, &nc_ctx->mp); /* t1 <- (+ r m+) */
tc2 = (duk__bi_compare(&nc_ctx->t1, &nc_ctx->s) >= (nc_ctx->high_ok ? 0 : 1));
DUK_DDD(DUK_DDDPRINT("tc1=%ld, tc2=%ld", (long) tc1, (long) tc2));
} else {
/* fixed-format */
tc1 = 0;
tc2 = 0;
}
/* Count is incremented before DUK__DRAGON4_OUTPUT_PREINC() call
* on purpose, which is taken into account by the macro.
*/
count++;
if (tc1) {
if (tc2) {
/* tc1 = true, tc2 = true */
duk__bi_mul_small(&nc_ctx->t1, &nc_ctx->r, 2);
if (duk__bi_compare(&nc_ctx->t1, &nc_ctx->s) < 0) { /* (< (* r 2) s) */
DUK_DDD(DUK_DDDPRINT("tc1=true, tc2=true, 2r > s: output d --> %ld (k=%ld)",
(long) d, (long) nc_ctx->k));
DUK__DRAGON4_OUTPUT_PREINC(nc_ctx, count, d);
} else {
DUK_DDD(DUK_DDDPRINT("tc1=true, tc2=true, 2r <= s: output d+1 --> %ld (k=%ld)",
(long) (d + 1), (long) nc_ctx->k));
DUK__DRAGON4_OUTPUT_PREINC(nc_ctx, count, d + 1);
}
break;
} else {
/* tc1 = true, tc2 = false */
DUK_DDD(DUK_DDDPRINT("tc1=true, tc2=false: output d --> %ld (k=%ld)",
(long) d, (long) nc_ctx->k));
DUK__DRAGON4_OUTPUT_PREINC(nc_ctx, count, d);
break;
}
} else {
if (tc2) {
/* tc1 = false, tc2 = true */
DUK_DDD(DUK_DDDPRINT("tc1=false, tc2=true: output d+1 --> %ld (k=%ld)",
(long) (d + 1), (long) nc_ctx->k));
DUK__DRAGON4_OUTPUT_PREINC(nc_ctx, count, d + 1);
break;
} else {
/* tc1 = false, tc2 = false */
DUK_DDD(DUK_DDDPRINT("tc1=false, tc2=false: output d --> %ld (k=%ld)",
(long) d, (long) nc_ctx->k));
DUK__DRAGON4_OUTPUT_PREINC(nc_ctx, count, d);
/* r <- r (updated above: r <- (remainder (* r B) s)
* s <- s
* m+ <- m+ (updated above: m+ <- (* m+ B)
* m- <- m- (updated above: m- <- (* m- B)
* B, low_ok, high_ok are fixed
*/
/* fall through and continue for-loop */
}
}
/* fixed-format termination conditions */
if (nc_ctx->is_fixed) {
if (nc_ctx->abs_pos) {
int pos = nc_ctx->k - count + 1; /* count is already incremented, take into account */
DUK_DDD(DUK_DDDPRINT("fixed format, absolute: abs pos=%ld, k=%ld, count=%ld, req=%ld",
(long) pos, (long) nc_ctx->k, (long) count, (long) nc_ctx->req_digits));
if (pos <= nc_ctx->req_digits) {
DUK_DDD(DUK_DDDPRINT("digit position reached req_digits, end generate loop"));
break;
}
} else {
DUK_DDD(DUK_DDDPRINT("fixed format, relative: k=%ld, count=%ld, req=%ld",
(long) nc_ctx->k, (long) count, (long) nc_ctx->req_digits));
if (count >= nc_ctx->req_digits) {
DUK_DDD(DUK_DDDPRINT("digit count reached req_digits, end generate loop"));
break;
}
}
}
} /* for */
nc_ctx->count = count;
DUK_DDD(DUK_DDDPRINT("generate finished"));
#ifdef DUK_USE_DDDPRINT
{
duk_uint8_t buf[2048];
duk_small_int_t i, t;
DUK_MEMZERO(buf, sizeof(buf));
for (i = 0; i < nc_ctx->count; i++) {
t = nc_ctx->digits[i];
if (t < 0 || t > 36) {
buf[i] = (duk_uint8_t) '?';
} else {
buf[i] = (duk_uint8_t) DUK__DIGITCHAR(t);
}
}
DUK_DDD(DUK_DDDPRINT("-> generated digits; k=%ld, digits='%s'",
(long) nc_ctx->k, (const char *) buf));
}
#endif
}
/* Round up digits to a given position. If position is out-of-bounds,
* does nothing. If carry propagates over the first digit, a '1' is
* prepended to digits and 'k' will be updated. Return value indicates
* whether carry propagated over the first digit.
*
* Note that nc_ctx->count is NOT updated based on the rounding position
* (it is updated only if carry overflows over the first digit and an
* extra digit is prepended).
*/
DUK_LOCAL duk_small_int_t duk__dragon4_fixed_format_round(duk__numconv_stringify_ctx *nc_ctx, duk_small_int_t round_idx) {
duk_small_int_t t;
duk_uint8_t *p;
duk_uint8_t roundup_limit;
duk_small_int_t ret = 0;
/*
* round_idx points to the digit which is considered for rounding; the
* digit to its left is the final digit of the rounded value. If round_idx
* is zero, rounding will be performed; the result will either be an empty
* rounded value or if carry happens a '1' digit is generated.
*/
if (round_idx >= nc_ctx->count) {
DUK_DDD(DUK_DDDPRINT("round_idx out of bounds (%ld >= %ld (count)) -> no rounding",
(long) round_idx, (long) nc_ctx->count));
return 0;
} else if (round_idx < 0) {
DUK_DDD(DUK_DDDPRINT("round_idx out of bounds (%ld < 0) -> no rounding",
(long) round_idx));
return 0;
}
/*
* Round-up limit.
*
* For even values, divides evenly, e.g. 10 -> roundup_limit=5.
*
* For odd values, rounds up, e.g. 3 -> roundup_limit=2.
* If radix is 3, 0/3 -> down, 1/3 -> down, 2/3 -> up.
*/
roundup_limit = (duk_uint8_t) ((nc_ctx->B + 1) / 2);
p = &nc_ctx->digits[round_idx];
if (*p >= roundup_limit) {
DUK_DDD(DUK_DDDPRINT("fixed-format rounding carry required"));
/* carry */
for (;;) {
*p = 0;
if (p == &nc_ctx->digits[0]) {
DUK_DDD(DUK_DDDPRINT("carry propagated to first digit -> special case handling"));
DUK_MEMMOVE((void *) (&nc_ctx->digits[1]),
(const void *) (&nc_ctx->digits[0]),
(size_t) (sizeof(char) * nc_ctx->count));
nc_ctx->digits[0] = 1; /* don't increase 'count' */
nc_ctx->k++; /* position of highest digit changed */
nc_ctx->count++; /* number of digits changed */
ret = 1;
break;
}
DUK_DDD(DUK_DDDPRINT("fixed-format rounding carry: B=%ld, roundup_limit=%ld, p=%p, digits=%p",
(long) nc_ctx->B, (long) roundup_limit, (void *) p, (void *) nc_ctx->digits));
p--;
t = *p;
DUK_DDD(DUK_DDDPRINT("digit before carry: %ld", (long) t));
if (++t < nc_ctx->B) {
DUK_DDD(DUK_DDDPRINT("rounding carry terminated"));
*p = (duk_uint8_t) t;
break;
}
DUK_DDD(DUK_DDDPRINT("wraps, carry to next digit"));
}
}
return ret;
}
#define DUK__NO_EXP (65536) /* arbitrary marker, outside valid exp range */
DUK_LOCAL void duk__dragon4_convert_and_push(duk__numconv_stringify_ctx *nc_ctx,
duk_context *ctx,
duk_small_int_t radix,
duk_small_int_t digits,
duk_small_uint_t flags,
duk_small_int_t neg) {
duk_small_int_t k;
duk_small_int_t pos, pos_end;
duk_small_int_t expt;
duk_small_int_t dig;
duk_uint8_t *q;
duk_uint8_t *buf;
/*
* The string conversion here incorporates all the necessary Ecmascript
* semantics without attempting to be generic. nc_ctx->digits contains
* nc_ctx->count digits (>= 1), with the topmost digit's 'position'
* indicated by nc_ctx->k as follows:
*
* digits="123" count=3 k=0 --> 0.123
* digits="123" count=3 k=1 --> 1.23
* digits="123" count=3 k=5 --> 12300
* digits="123" count=3 k=-1 --> 0.0123
*
* Note that the identifier names used for format selection are different
* in Burger-Dybvig paper and Ecmascript specification (quite confusingly
* so, because e.g. 'k' has a totally different meaning in each). See
* documentation for discussion.
*
* Ecmascript doesn't specify any specific behavior for format selection
* (e.g. when to use exponent notation) for non-base-10 numbers.
*
* The bigint space in the context is reused for string output, as there
* is more than enough space for that (>1kB at the moment), and we avoid
* allocating even more stack.
*/
DUK_ASSERT(DUK__NUMCONV_CTX_BIGINTS_SIZE >= DUK__MAX_FORMATTED_LENGTH);
DUK_ASSERT(nc_ctx->count >= 1);
k = nc_ctx->k;
buf = (duk_uint8_t *) &nc_ctx->f; /* XXX: union would be more correct */
q = buf;
/* Exponent handling: if exponent format is used, record exponent value and
* fake k such that one leading digit is generated (e.g. digits=123 -> "1.23").
*
* toFixed() prevents exponent use; otherwise apply a set of criteria to
* match the other API calls (toString(), toPrecision, etc).
*/
expt = DUK__NO_EXP;
if (!nc_ctx->abs_pos /* toFixed() */) {
if ((flags & DUK_N2S_FLAG_FORCE_EXP) || /* exponential notation forced */
((flags & DUK_N2S_FLAG_NO_ZERO_PAD) && /* fixed precision and zero padding would be required */
(k - digits >= 1)) || /* (e.g. k=3, digits=2 -> "12X") */
((k > 21 || k <= -6) && (radix == 10))) { /* toString() conditions */
DUK_DDD(DUK_DDDPRINT("use exponential notation: k=%ld -> expt=%ld",
(long) k, (long) (k - 1)));
expt = k - 1; /* e.g. 12.3 -> digits="123" k=2 -> 1.23e1 */
k = 1; /* generate mantissa with a single leading whole number digit */
}
}
if (neg) {
*q++ = '-';
}
/* Start position (inclusive) and end position (exclusive) */
pos = (k >= 1 ? k : 1);
if (nc_ctx->is_fixed) {
if (nc_ctx->abs_pos) {
/* toFixed() */
pos_end = -digits;
} else {
pos_end = k - digits;
}
} else {
pos_end = k - nc_ctx->count;
}
if (pos_end > 0) {
pos_end = 0;
}
DUK_DDD(DUK_DDDPRINT("expt=%ld, k=%ld, count=%ld, pos=%ld, pos_end=%ld, is_fixed=%ld, "
"digits=%ld, abs_pos=%ld",
(long) expt, (long) k, (long) nc_ctx->count, (long) pos, (long) pos_end,
(long) nc_ctx->is_fixed, (long) digits, (long) nc_ctx->abs_pos));
/* Digit generation */
while (pos > pos_end) {
DUK_DDD(DUK_DDDPRINT("digit generation: pos=%ld, pos_end=%ld",
(long) pos, (long) pos_end));
if (pos == 0) {
*q++ = (duk_uint8_t) '.';
}
if (pos > k) {
*q++ = (duk_uint8_t) '0';
} else if (pos <= k - nc_ctx->count) {
*q++ = (duk_uint8_t) '0';
} else {
dig = nc_ctx->digits[k - pos];
DUK_ASSERT(dig >= 0 && dig < nc_ctx->B);
*q++ = (duk_uint8_t) DUK__DIGITCHAR(dig);
}
pos--;
}
DUK_ASSERT(pos <= 1);
/* Exponent */
if (expt != DUK__NO_EXP) {
/*
* Exponent notation for non-base-10 numbers isn't specified in Ecmascript
* specification, as it never explicitly turns up: non-decimal numbers can
* only be formatted with Number.prototype.toString([radix]) and for that,
* behavior is not explicitly specified.
*
* Logical choices include formatting the exponent as decimal (e.g. binary
* 100000 as 1e+5) or in current radix (e.g. binary 100000 as 1e+101).
* The Dragon4 algorithm (in the original paper) prints the exponent value
* in the target radix B. However, for radix values 15 and above, the
* exponent separator 'e' is no longer easily parseable. Consider, for
* instance, the number "1.faecee+1c".
*/
duk_size_t len;
char expt_sign;
*q++ = 'e';
if (expt >= 0) {
expt_sign = '+';
} else {
expt_sign = '-';
expt = -expt;
}
*q++ = (duk_uint8_t) expt_sign;
len = duk__dragon4_format_uint32(q, (duk_uint32_t) expt, radix);
q += len;
}
duk_push_lstring(ctx, (const char *) buf, (size_t) (q - buf));
}
/*
* Conversion helpers
*/
DUK_LOCAL void duk__dragon4_double_to_ctx(duk__numconv_stringify_ctx *nc_ctx, duk_double_t x) {
duk_double_union u;
duk_uint32_t tmp;
duk_small_int_t expt;
/*
* seeeeeee eeeeffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
* A B C D E F G H
*
* s sign bit
* eee... exponent field
* fff... fraction
*
* ieee value = 1.ffff... * 2^(e - 1023) (normal)
* = 0.ffff... * 2^(-1022) (denormal)
*
* algorithm v = f * b^e
*/
DUK_DBLUNION_SET_DOUBLE(&u, x);
nc_ctx->f.n = 2;
tmp = DUK_DBLUNION_GET_LOW32(&u);
nc_ctx->f.v[0] = tmp;
tmp = DUK_DBLUNION_GET_HIGH32(&u);
nc_ctx->f.v[1] = tmp & 0x000fffffUL;
expt = (duk_small_int_t) ((tmp >> 20) & 0x07ffUL);
if (expt == 0) {
/* denormal */
expt = DUK__IEEE_DOUBLE_EXP_MIN - 52;
duk__bi_normalize(&nc_ctx->f);
} else {
/* normal: implicit leading 1-bit */
nc_ctx->f.v[1] |= 0x00100000UL;
expt = expt - DUK__IEEE_DOUBLE_EXP_BIAS - 52;
DUK_ASSERT(duk__bi_is_valid(&nc_ctx->f)); /* true, because v[1] has at least one bit set */
}
DUK_ASSERT(duk__bi_is_valid(&nc_ctx->f));
nc_ctx->e = expt;
}
DUK_LOCAL void duk__dragon4_ctx_to_double(duk__numconv_stringify_ctx *nc_ctx, duk_double_t *x) {
duk_double_union u;
duk_small_int_t expt;
duk_small_int_t i;
duk_small_int_t bitstart;
duk_small_int_t bitround;
duk_small_int_t bitidx;
duk_small_int_t skip_round;
duk_uint32_t t, v;
DUK_ASSERT(nc_ctx->count == 53 + 1);
/* Sometimes this assert is not true right now; it will be true after
* rounding. See: test-bug-numconv-mantissa-assert.js.
*/
DUK_ASSERT_DISABLE(nc_ctx->digits[0] == 1); /* zero handled by caller */
/* Should not be required because the code below always sets both high
* and low parts, but at least gcc-4.4.5 fails to deduce this correctly
* (perhaps because the low part is set (seemingly) conditionally in a
* loop), so this is here to avoid the bogus warning.
*/
DUK_MEMZERO((void *) &u, sizeof(u));
/*
* Figure out how generated digits match up with the mantissa,
* and then perform rounding. If mantissa overflows, need to
* recompute the exponent (it is bumped and may overflow to
* infinity).
*
* For normal numbers the leading '1' is hidden and ignored,
* and the last bit is used for rounding:
*
* rounding pt
* <--------52------->|
* 1 x x x x ... x x x x|y ==> x x x x ... x x x x
*
* For denormals, the leading '1' is included in the number,
* and the rounding point is different:
*
* rounding pt
* <--52 or less--->|
* 1 x x x x ... x x|x x y ==> 0 0 ... 1 x x ... x x
*
* The largest denormals will have a mantissa beginning with
* a '1' (the explicit leading bit); smaller denormals will
* have leading zero bits.
*
* If the exponent would become too high, the result becomes
* Infinity. If the exponent is so small that the entire
* mantissa becomes zero, the result becomes zero.
*
* Note: the Dragon4 'k' is off-by-one with respect to the IEEE
* exponent. For instance, k==0 indicates that the leading '1'
* digit is at the first binary fraction position (0.1xxx...);
* the corresponding IEEE exponent would be -1.
*/
skip_round = 0;
recheck_exp:
expt = nc_ctx->k - 1; /* IEEE exp without bias */
if (expt > 1023) {
/* Infinity */
bitstart = -255; /* needed for inf: causes mantissa to become zero,
* and rounding to be skipped.
*/
expt = 2047;
} else if (expt >= -1022) {
/* normal */
bitstart = 1; /* skip leading digit */
expt += DUK__IEEE_DOUBLE_EXP_BIAS;
DUK_ASSERT(expt >= 1 && expt <= 2046);
} else {
/* denormal or zero */
bitstart = 1023 + expt; /* expt==-1023 -> bitstart=0 (leading 1);
* expt==-1024 -> bitstart=-1 (one left of leading 1), etc
*/
expt = 0;
}
bitround = bitstart + 52;
DUK_DDD(DUK_DDDPRINT("ieee expt=%ld, bitstart=%ld, bitround=%ld",
(long) expt, (long) bitstart, (long) bitround));
if (!skip_round) {
if (duk__dragon4_fixed_format_round(nc_ctx, bitround)) {
/* Corner case: see test-numconv-parse-mant-carry.js. We could
* just bump the exponent and update bitstart, but it's more robust
* to recompute (but avoid rounding twice).
*/
DUK_DDD(DUK_DDDPRINT("rounding caused exponent to be bumped, recheck exponent"));
skip_round = 1;
goto recheck_exp;
}
}
/*
* Create mantissa
*/
t = 0;
for (i = 0; i < 52; i++) {
bitidx = bitstart + 52 - 1 - i;
if (bitidx >= nc_ctx->count) {
v = 0;
} else if (bitidx < 0) {
v = 0;
} else {
v = nc_ctx->digits[bitidx];
}
DUK_ASSERT(v == 0 || v == 1);
t += v << (i % 32);
if (i == 31) {
/* low 32 bits is complete */
DUK_DBLUNION_SET_LOW32(&u, t);
t = 0;
}
}
/* t has high mantissa */
DUK_DDD(DUK_DDDPRINT("mantissa is complete: %08lx %08lx",
(unsigned long) t,
(unsigned long) DUK_DBLUNION_GET_LOW32(&u)));
DUK_ASSERT(expt >= 0 && expt <= 0x7ffL);
t += expt << 20;
#if 0 /* caller handles sign change */
if (negative) {
t |= 0x80000000U;
}
#endif
DUK_DBLUNION_SET_HIGH32(&u, t);
DUK_DDD(DUK_DDDPRINT("number is complete: %08lx %08lx",
(unsigned long) DUK_DBLUNION_GET_HIGH32(&u),
(unsigned long) DUK_DBLUNION_GET_LOW32(&u)));
*x = DUK_DBLUNION_GET_DOUBLE(&u);
}
/*
* Exposed number-to-string API
*
* Input: [ number ]
* Output: [ string ]
*/
DUK_INTERNAL void duk_numconv_stringify(duk_context *ctx, duk_small_int_t radix, duk_small_int_t digits, duk_small_uint_t flags) {
duk_double_t x;
duk_small_int_t c;
duk_small_int_t neg;
duk_uint32_t uval;
duk__numconv_stringify_ctx nc_ctx_alloc; /* large context; around 2kB now */
duk__numconv_stringify_ctx *nc_ctx = &nc_ctx_alloc;
x = (duk_double_t) duk_require_number(ctx, -1);
duk_pop(ctx);
/*
* Handle special cases (NaN, infinity, zero).
*/
c = (duk_small_int_t) DUK_FPCLASSIFY(x);
if (DUK_SIGNBIT((double) x)) {
x = -x;
neg = 1;
} else {
neg = 0;
}
/* NaN sign bit is platform specific with unpacked, un-normalized NaNs */
DUK_ASSERT(c == DUK_FP_NAN || DUK_SIGNBIT((double) x) == 0);
if (c == DUK_FP_NAN) {
duk_push_hstring_stridx(ctx, DUK_STRIDX_NAN);
return;
} else if (c == DUK_FP_INFINITE) {
if (neg) {
/* -Infinity */
duk_push_hstring_stridx(ctx, DUK_STRIDX_MINUS_INFINITY);
} else {
/* Infinity */
duk_push_hstring_stridx(ctx, DUK_STRIDX_INFINITY);
}
return;
} else if (c == DUK_FP_ZERO) {
/* We can't shortcut zero here if it goes through special formatting
* (such as forced exponential notation).
*/
;
}
/*
* Handle integers in 32-bit range (that is, [-(2**32-1),2**32-1])
* specially, as they're very likely for embedded programs. This
* is now done for all radix values. We must be careful not to use
* the fast path when special formatting (e.g. forced exponential)
* is in force.
*
* XXX: could save space by supporting radix 10 only and using
* sprintf "%lu" for the fast path and for exponent formatting.
*/
uval = (unsigned int) x;
if (((double) uval) == x && /* integer number in range */
flags == 0) { /* no special formatting */
/* use bigint area as a temp */
duk_uint8_t *buf = (duk_uint8_t *) (&nc_ctx->f);
duk_uint8_t *p = buf;
DUK_ASSERT(DUK__NUMCONV_CTX_BIGINTS_SIZE >= 32 + 1); /* max size: radix=2 + sign */
if (neg && uval != 0) {
/* no negative sign for zero */
*p++ = (duk_uint8_t) '-';
}
p += duk__dragon4_format_uint32(p, uval, radix);
duk_push_lstring(ctx, (const char *) buf, (duk_size_t) (p - buf));
return;
}
/*
* Dragon4 setup.
*
* Convert double from IEEE representation for conversion;
* normal finite values have an implicit leading 1-bit. The
* slow path algorithm doesn't handle zero, so zero is special
* cased here but still creates a valid nc_ctx, and goes
* through normal formatting in case special formatting has
* been requested (e.g. forced exponential format: 0 -> "0e+0").
*/
/* Would be nice to bulk clear the allocation, but the context
* is 1-2 kilobytes and nothing should rely on it being zeroed.
*/
#if 0
DUK_MEMZERO((void *) nc_ctx, sizeof(*nc_ctx)); /* slow init, do only for slow path cases */
#endif
nc_ctx->is_s2n = 0;
nc_ctx->b = 2;
nc_ctx->B = radix;
nc_ctx->abs_pos = 0;
if (flags & DUK_N2S_FLAG_FIXED_FORMAT) {
nc_ctx->is_fixed = 1;
if (flags & DUK_N2S_FLAG_FRACTION_DIGITS) {
/* absolute req_digits; e.g. digits = 1 -> last digit is 0,
* but add an extra digit for rounding.
*/
nc_ctx->abs_pos = 1;
nc_ctx->req_digits = (-digits + 1) - 1;
} else {
nc_ctx->req_digits = digits + 1;
}
} else {
nc_ctx->is_fixed = 0;
nc_ctx->req_digits = 0;
}
if (c == DUK_FP_ZERO) {
/* Zero special case: fake requested number of zero digits; ensure
* no sign bit is printed. Relative and absolute fixed format
* require separate handling.
*/
duk_small_int_t count;
if (nc_ctx->is_fixed) {
if (nc_ctx->abs_pos) {
count = digits + 2; /* lead zero + 'digits' fractions + 1 for rounding */
} else {
count = digits + 1; /* + 1 for rounding */
}
} else {
count = 1;
}
DUK_DDD(DUK_DDDPRINT("count=%ld", (long) count));
DUK_ASSERT(count >= 1);
DUK_MEMZERO((void *) nc_ctx->digits, count);
nc_ctx->count = count;
nc_ctx->k = 1; /* 0.000... */
neg = 0;
goto zero_skip;
}
duk__dragon4_double_to_ctx(nc_ctx, x); /* -> sets 'f' and 'e' */
DUK__BI_PRINT("f", &nc_ctx->f);
DUK_DDD(DUK_DDDPRINT("e=%ld", (long) nc_ctx->e));
/*
* Dragon4 slow path digit generation.
*/
duk__dragon4_prepare(nc_ctx); /* setup many variables in nc_ctx */
DUK_DDD(DUK_DDDPRINT("after prepare:"));
DUK__BI_PRINT("r", &nc_ctx->r);
DUK__BI_PRINT("s", &nc_ctx->s);
DUK__BI_PRINT("mp", &nc_ctx->mp);
DUK__BI_PRINT("mm", &nc_ctx->mm);
duk__dragon4_scale(nc_ctx);
DUK_DDD(DUK_DDDPRINT("after scale; k=%ld", (long) nc_ctx->k));
DUK__BI_PRINT("r", &nc_ctx->r);
DUK__BI_PRINT("s", &nc_ctx->s);
DUK__BI_PRINT("mp", &nc_ctx->mp);
DUK__BI_PRINT("mm", &nc_ctx->mm);
duk__dragon4_generate(nc_ctx);
/*
* Convert and push final string.
*/
zero_skip:
if (flags & DUK_N2S_FLAG_FIXED_FORMAT) {
/* Perform fixed-format rounding. */
duk_small_int_t roundpos;
if (flags & DUK_N2S_FLAG_FRACTION_DIGITS) {
/* 'roundpos' is relative to nc_ctx->k and increases to the right
* (opposite of how 'k' changes).
*/
roundpos = -digits; /* absolute position for digit considered for rounding */
roundpos = nc_ctx->k - roundpos;
} else {
roundpos = digits;
}
DUK_DDD(DUK_DDDPRINT("rounding: k=%ld, count=%ld, digits=%ld, roundpos=%ld",
(long) nc_ctx->k, (long) nc_ctx->count, (long) digits, (long) roundpos));
(void) duk__dragon4_fixed_format_round(nc_ctx, roundpos);
/* Note: 'count' is currently not adjusted by rounding (i.e. the
* digits are not "chopped off". That shouldn't matter because
* the digit position (absolute or relative) is passed on to the
* convert-and-push function.
*/
}
duk__dragon4_convert_and_push(nc_ctx, ctx, radix, digits, flags, neg);
}
/*
* Exposed string-to-number API
*
* Input: [ string ]
* Output: [ number ]
*
* If number parsing fails, a NaN is pushed as the result. If number parsing
* fails due to an internal error, an InternalError is thrown.
*/
DUK_INTERNAL void duk_numconv_parse(duk_context *ctx, duk_small_int_t radix, duk_small_uint_t flags) {
duk_hthread *thr = (duk_hthread *) ctx;
duk__numconv_stringify_ctx nc_ctx_alloc; /* large context; around 2kB now */
duk__numconv_stringify_ctx *nc_ctx = &nc_ctx_alloc;
duk_double_t res;
duk_hstring *h_str;
duk_small_int_t expt;
duk_small_int_t expt_neg;
duk_small_int_t expt_adj;
duk_small_int_t neg;
duk_small_int_t dig;
duk_small_int_t dig_whole;
duk_small_int_t dig_lzero;
duk_small_int_t dig_frac;
duk_small_int_t dig_expt;
duk_small_int_t dig_prec;
const duk__exp_limits *explim;
const duk_uint8_t *p;
duk_small_int_t ch;
/* This seems to waste a lot of stack frame entries, but good compilers
* will compute these as needed below. Some of these initial flags are
* also modified in the code below, so they can't all be removed.
*/
duk_small_int_t trim_white = (flags & DUK_S2N_FLAG_TRIM_WHITE);
duk_small_int_t allow_expt = (flags & DUK_S2N_FLAG_ALLOW_EXP);
duk_small_int_t allow_garbage = (flags & DUK_S2N_FLAG_ALLOW_GARBAGE);
duk_small_int_t allow_plus = (flags & DUK_S2N_FLAG_ALLOW_PLUS);
duk_small_int_t allow_minus = (flags & DUK_S2N_FLAG_ALLOW_MINUS);
duk_small_int_t allow_infinity = (flags & DUK_S2N_FLAG_ALLOW_INF);
duk_small_int_t allow_frac = (flags & DUK_S2N_FLAG_ALLOW_FRAC);
duk_small_int_t allow_naked_frac = (flags & DUK_S2N_FLAG_ALLOW_NAKED_FRAC);
duk_small_int_t allow_empty_frac = (flags & DUK_S2N_FLAG_ALLOW_EMPTY_FRAC);
duk_small_int_t allow_empty = (flags & DUK_S2N_FLAG_ALLOW_EMPTY_AS_ZERO);
duk_small_int_t allow_leading_zero = (flags & DUK_S2N_FLAG_ALLOW_LEADING_ZERO);
duk_small_int_t allow_auto_hex_int = (flags & DUK_S2N_FLAG_ALLOW_AUTO_HEX_INT);
duk_small_int_t allow_auto_oct_int = (flags & DUK_S2N_FLAG_ALLOW_AUTO_OCT_INT);
DUK_DDD(DUK_DDDPRINT("parse number: %!T, radix=%ld, flags=0x%08lx",
(duk_tval *) duk_get_tval(ctx, -1),
(long) radix, (unsigned long) flags));
DUK_ASSERT(radix >= 2 && radix <= 36);
DUK_ASSERT(radix - 2 < (duk_small_int_t) sizeof(duk__str2num_digits_for_radix));
/*
* Preliminaries: trim, sign, Infinity check
*
* We rely on the interned string having a NUL terminator, which will
* cause a parse failure wherever it is encountered. As a result, we
* don't need separate pointer checks.
*
* There is no special parsing for 'NaN' in the specification although
* 'Infinity' (with an optional sign) is allowed in some contexts.
* Some contexts allow plus/minus sign, while others only allow the
* minus sign (like JSON.parse()).
*
* Automatic hex number detection (leading '0x' or '0X') and octal
* number detection (leading '0' followed by at least one octal digit)
* is done here too.
*/
if (trim_white) {
/* Leading / trailing whitespace is sometimes accepted and
* sometimes not. After white space trimming, all valid input
* characters are pure ASCII.
*/
duk_trim(ctx, -1);
}
h_str = duk_require_hstring(ctx, -1);
DUK_ASSERT(h_str != NULL);
p = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_str);
neg = 0;
ch = *p;
if (ch == (duk_small_int_t) '+') {
if (!allow_plus) {
DUK_DDD(DUK_DDDPRINT("parse failed: leading plus sign not allowed"));
goto parse_fail;
}
p++;
} else if (ch == (duk_small_int_t) '-') {
if (!allow_minus) {
DUK_DDD(DUK_DDDPRINT("parse failed: leading minus sign not allowed"));
goto parse_fail;
}
p++;
neg = 1;
}
ch = *p;
if (allow_infinity && ch == (duk_small_int_t) 'I') {
/* Don't check for Infinity unless the context allows it.
* 'Infinity' is a valid integer literal in e.g. base-36:
*
* parseInt('Infinity', 36)
* 1461559270678
*/
const duk_uint8_t *q;
/* borrow literal Infinity from builtin string */
q = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(DUK_HTHREAD_STRING_INFINITY(thr));
if (DUK_STRNCMP((const char *) p, (const char *) q, 8) == 0) {
if (!allow_garbage && (p[8] != (duk_uint8_t) 0)) {
DUK_DDD(DUK_DDDPRINT("parse failed: trailing garbage after matching 'Infinity' not allowed"));
goto parse_fail;
} else {
res = DUK_DOUBLE_INFINITY;
goto negcheck_and_ret;
}
}
}
if (ch == (duk_small_int_t) '0') {
duk_small_int_t detect_radix = 0;
ch = p[1];
if (allow_auto_hex_int && (ch == (duk_small_int_t) 'x' || ch == (duk_small_int_t) 'X')) {
DUK_DDD(DUK_DDDPRINT("detected 0x/0X hex prefix, changing radix and preventing fractions and exponent"));
detect_radix = 16;
allow_empty = 0; /* interpret e.g. '0x' and '0xg' as a NaN (= parse error) */
p += 2;
} else if (allow_auto_oct_int && (ch >= (duk_small_int_t) '0' && ch <= (duk_small_int_t) '9')) {
DUK_DDD(DUK_DDDPRINT("detected 0n oct prefix, changing radix and preventing fractions and exponent"));
detect_radix = 8;
allow_empty = 1; /* interpret e.g. '09' as '0', not NaN */
p += 1;
}
if (detect_radix > 0) {
radix = detect_radix;
allow_expt = 0;
allow_frac = 0;
allow_naked_frac = 0;
allow_empty_frac = 0;
allow_leading_zero = 1; /* allow e.g. '0x0009' and '00077' */
}
}
/*
* Scan number and setup for Dragon4.
*
* The fast path case is detected during setup: an integer which
* can be converted without rounding, no net exponent. The fast
* path could be implemented as a separate scan, but may not really
* be worth it: the multiplications for building 'f' are not
* expensive when 'f' is small.
*
* The significand ('f') must contain enough bits of (apparent)
* accuracy, so that Dragon4 will generate enough binary output digits.
* For decimal numbers, this means generating a 20-digit significand,
* which should yield enough practical accuracy to parse IEEE doubles.
* In fact, the Ecmascript specification explicitly allows an
* implementation to treat digits beyond 20 as zeroes (and even
* to round the 20th digit upwards). For non-decimal numbers, the
* appropriate number of digits has been precomputed for comparable
* accuracy.
*
* Digit counts:
*
* [ dig_lzero ]
* |
* .+-..---[ dig_prec ]----.
* | || |
* 0000123.456789012345678901234567890e+123456
* | | | | | |
* `--+--' `------[ dig_frac ]-------' `-+--'
* | |
* [ dig_whole ] [ dig_expt ]
*
* dig_frac and dig_expt are -1 if not present
* dig_lzero is only computed for whole number part
*
* Parsing state
*
* Parsing whole part dig_frac < 0 AND dig_expt < 0
* Parsing fraction part dig_frac >= 0 AND dig_expt < 0
* Parsing exponent part dig_expt >= 0 (dig_frac may be < 0 or >= 0)
*
* Note: in case we hit an implementation limit (like exponent range),
* we should throw an error, NOT return NaN or Infinity. Even with
* very large exponent (or significand) values the final result may be
* finite, so NaN/Infinity would be incorrect.
*/
duk__bi_set_small(&nc_ctx->f, 0);
dig_prec = 0;
dig_lzero = 0;
dig_whole = 0;
dig_frac = -1;
dig_expt = -1;
expt = 0;
expt_adj = 0; /* essentially tracks digit position of lowest 'f' digit */
expt_neg = 0;
for (;;) {
ch = *p++;
DUK_DDD(DUK_DDDPRINT("parse digits: p=%p, ch='%c' (%ld), expt=%ld, expt_adj=%ld, "
"dig_whole=%ld, dig_frac=%ld, dig_expt=%ld, dig_lzero=%ld, dig_prec=%ld",
(const void *) p, (int) ((ch >= 0x20 && ch <= 0x7e) ? ch : '?'), (long) ch,
(long) expt, (long) expt_adj, (long) dig_whole, (long) dig_frac,
(long) dig_expt, (long) dig_lzero, (long) dig_prec));
DUK__BI_PRINT("f", &nc_ctx->f);
/* Most common cases first. */
if (ch >= (duk_small_int_t) '0' && ch <= (duk_small_int_t) '9') {
dig = (int) ch - '0' + 0;
} else if (ch == (duk_small_int_t) '.') {
/* A leading digit is not required in some cases, e.g. accept ".123".
* In other cases (JSON.parse()) a leading digit is required. This
* is checked for after the loop.
*/
if (dig_frac >= 0 || dig_expt >= 0) {
if (allow_garbage) {
DUK_DDD(DUK_DDDPRINT("garbage termination (invalid period)"));
break;
} else {
DUK_DDD(DUK_DDDPRINT("parse failed: period not allowed"));
goto parse_fail;
}
}
if (!allow_frac) {
/* Some contexts don't allow fractions at all; this can't be a
* post-check because the state ('f' and expt) would be incorrect.
*/
if (allow_garbage) {
DUK_DDD(DUK_DDDPRINT("garbage termination (invalid first period)"));
break;
} else {
DUK_DDD(DUK_DDDPRINT("parse failed: fraction part not allowed"));
}
}
DUK_DDD(DUK_DDDPRINT("start fraction part"));
dig_frac = 0;
continue;
} else if (ch == (duk_small_int_t) 0) {
DUK_DDD(DUK_DDDPRINT("NUL termination"));
break;
} else if (allow_expt && dig_expt < 0 && (ch == (duk_small_int_t) 'e' || ch == (duk_small_int_t) 'E')) {
/* Note: we don't parse back exponent notation for anything else
* than radix 10, so this is not an ambiguous check (e.g. hex
* exponent values may have 'e' either as a significand digit
* or as an exponent separator).
*
* If the exponent separator occurs twice, 'e' will be interpreted
* as a digit (= 14) and will be rejected as an invalid decimal
* digit.
*/
DUK_DDD(DUK_DDDPRINT("start exponent part"));
/* Exponent without a sign or with a +/- sign is accepted
* by all call sites (even JSON.parse()).
*/
ch = *p;
if (ch == (duk_small_int_t) '-') {
expt_neg = 1;
p++;
} else if (ch == (duk_small_int_t) '+') {
p++;
}
dig_expt = 0;
continue;
} else if (ch >= (duk_small_int_t) 'a' && ch <= (duk_small_int_t) 'z') {
dig = (duk_small_int_t) (ch - (duk_small_int_t) 'a' + 0x0a);
} else if (ch >= (duk_small_int_t) 'A' && ch <= (duk_small_int_t) 'Z') {
dig = (duk_small_int_t) (ch - (duk_small_int_t) 'A' + 0x0a);
} else {
dig = 255; /* triggers garbage digit check below */
}
DUK_ASSERT((dig >= 0 && dig <= 35) || dig == 255);
if (dig >= radix) {
if (allow_garbage) {
DUK_DDD(DUK_DDDPRINT("garbage termination"));
break;
} else {
DUK_DDD(DUK_DDDPRINT("parse failed: trailing garbage or invalid digit"));
goto parse_fail;
}
}
if (dig_expt < 0) {
/* whole or fraction digit */
if (dig_prec < duk__str2num_digits_for_radix[radix - 2]) {
/* significant from precision perspective */
duk_small_int_t f_zero = duk__bi_is_zero(&nc_ctx->f);
if (f_zero && dig == 0) {
/* Leading zero is not counted towards precision digits; not
* in the integer part, nor in the fraction part.
*/
if (dig_frac < 0) {
dig_lzero++;
}
} else {
/* XXX: join these ops (multiply-accumulate), but only if
* code footprint decreases.
*/
duk__bi_mul_small(&nc_ctx->t1, &nc_ctx->f, radix);
duk__bi_add_small(&nc_ctx->f, &nc_ctx->t1, dig);
dig_prec++;
}
} else {
/* Ignore digits beyond a radix-specific limit, but note them
* in expt_adj.
*/
expt_adj++;
}
if (dig_frac >= 0) {
dig_frac++;
expt_adj--;
} else {
dig_whole++;
}
} else {
/* exponent digit */
expt = expt * radix + dig;
if (expt > DUK_S2N_MAX_EXPONENT) {
/* impose a reasonable exponent limit, so that exp
* doesn't need to get tracked using a bigint.
*/
DUK_DDD(DUK_DDDPRINT("parse failed: exponent too large"));
goto parse_explimit_error;
}
dig_expt++;
}
}
/* Leading zero. */
if (dig_lzero > 0 && dig_whole > 1) {
if (!allow_leading_zero) {
DUK_DDD(DUK_DDDPRINT("parse failed: leading zeroes not allowed in integer part"));
goto parse_fail;
}
}
/* Validity checks for various fraction formats ("0.1", ".1", "1.", "."). */
if (dig_whole == 0) {
if (dig_frac == 0) {
/* "." is not accepted in any format */
DUK_DDD(DUK_DDDPRINT("parse failed: plain period without leading or trailing digits"));
goto parse_fail;
} else if (dig_frac > 0) {
/* ".123" */
if (!allow_naked_frac) {
DUK_DDD(DUK_DDDPRINT("parse failed: fraction part not allowed without "
"leading integer digit(s)"));
goto parse_fail;
}
} else {
/* empty ("") is allowed in some formats (e.g. Number(''), as zero */
if (!allow_empty) {
DUK_DDD(DUK_DDDPRINT("parse failed: empty string not allowed (as zero)"));
goto parse_fail;
}
}
} else {
if (dig_frac == 0) {
/* "123." is allowed in some formats */
if (!allow_empty_frac) {
DUK_DDD(DUK_DDDPRINT("parse failed: empty fractions"));
goto parse_fail;
}
} else if (dig_frac > 0) {
/* "123.456" */
;
} else {
/* "123" */
;
}
}
/* Exponent without digits (e.g. "1e" or "1e+"). If trailing garbage is
* allowed, ignore exponent part as garbage (= parse as "1", i.e. exp 0).
*/
if (dig_expt == 0) {
if (!allow_garbage) {
DUK_DDD(DUK_DDDPRINT("parse failed: empty exponent"));
goto parse_fail;
}
DUK_ASSERT(expt == 0);
}
if (expt_neg) {
expt = -expt;
}
DUK_DDD(DUK_DDDPRINT("expt=%ld, expt_adj=%ld, net exponent -> %ld",
(long) expt, (long) expt_adj, (long) (expt + expt_adj)));
expt += expt_adj;
/* Fast path check. */
if (nc_ctx->f.n <= 1 && /* 32-bit value */
expt == 0 /* no net exponent */) {
/* Fast path is triggered for no exponent and also for balanced exponent
* and fraction parts, e.g. for "1.23e2" == "123". Remember to respect
* zero sign.
*/
/* XXX: could accept numbers larger than 32 bits, e.g. up to 53 bits? */
DUK_DDD(DUK_DDDPRINT("fast path number parse"));
if (nc_ctx->f.n == 1) {
res = (double) nc_ctx->f.v[0];
} else {
res = 0.0;
}
goto negcheck_and_ret;
}
/* Significand ('f') padding. */
while (dig_prec < duk__str2num_digits_for_radix[radix - 2]) {
/* Pad significand with "virtual" zero digits so that Dragon4 will
* have enough (apparent) precision to work with.
*/
DUK_DDD(DUK_DDDPRINT("dig_prec=%ld, pad significand with zero", (long) dig_prec));
duk__bi_mul_small_copy(&nc_ctx->f, radix, &nc_ctx->t1);
DUK__BI_PRINT("f", &nc_ctx->f);
expt--;
dig_prec++;
}
DUK_DDD(DUK_DDDPRINT("final exponent: %ld", (long) expt));
/* Detect zero special case. */
if (nc_ctx->f.n == 0) {
/* This may happen even after the fast path check, if exponent is
* not balanced (e.g. "0e1"). Remember to respect zero sign.
*/
DUK_DDD(DUK_DDDPRINT("significand is zero"));
res = 0.0;
goto negcheck_and_ret;
}
/* Quick reject of too large or too small exponents. This check
* would be incorrect for zero (e.g. "0e1000" is zero, not Infinity)
* so zero check must be above.
*/
explim = &duk__str2num_exp_limits[radix - 2];
if (expt > explim->upper) {
DUK_DDD(DUK_DDDPRINT("exponent too large -> infinite"));
res = (duk_double_t) DUK_DOUBLE_INFINITY;
goto negcheck_and_ret;
} else if (expt < explim->lower) {
DUK_DDD(DUK_DDDPRINT("exponent too small -> zero"));
res = (duk_double_t) 0.0;
goto negcheck_and_ret;
}
nc_ctx->is_s2n = 1;
nc_ctx->e = expt;
nc_ctx->b = radix;
nc_ctx->B = 2;
nc_ctx->is_fixed = 1;
nc_ctx->abs_pos = 0;
nc_ctx->req_digits = 53 + 1;
DUK__BI_PRINT("f", &nc_ctx->f);
DUK_DDD(DUK_DDDPRINT("e=%ld", (long) nc_ctx->e));
/*
* Dragon4 slow path (binary) digit generation.
* An extra digit is generated for rounding.
*/
duk__dragon4_prepare(nc_ctx); /* setup many variables in nc_ctx */
DUK_DDD(DUK_DDDPRINT("after prepare:"));
DUK__BI_PRINT("r", &nc_ctx->r);
DUK__BI_PRINT("s", &nc_ctx->s);
DUK__BI_PRINT("mp", &nc_ctx->mp);
DUK__BI_PRINT("mm", &nc_ctx->mm);
duk__dragon4_scale(nc_ctx);
DUK_DDD(DUK_DDDPRINT("after scale; k=%ld", (long) nc_ctx->k));
DUK__BI_PRINT("r", &nc_ctx->r);
DUK__BI_PRINT("s", &nc_ctx->s);
DUK__BI_PRINT("mp", &nc_ctx->mp);
DUK__BI_PRINT("mm", &nc_ctx->mm);
duk__dragon4_generate(nc_ctx);
DUK_ASSERT(nc_ctx->count == 53 + 1);
/*
* Convert binary digits into an IEEE double. Need to handle
* denormals and rounding correctly.
*/
duk__dragon4_ctx_to_double(nc_ctx, &res);
goto negcheck_and_ret;
negcheck_and_ret:
if (neg) {
res = -res;
}
duk_pop(ctx);
duk_push_number(ctx, (double) res);
DUK_DDD(DUK_DDDPRINT("result: %!T", (duk_tval *) duk_get_tval(ctx, -1)));
return;
parse_fail:
DUK_DDD(DUK_DDDPRINT("parse failed"));
duk_pop(ctx);
duk_push_nan(ctx);
return;
parse_explimit_error:
DUK_DDD(DUK_DDDPRINT("parse failed, internal error, can't return a value"));
DUK_ERROR_RANGE(thr, "exponent too large");
return;
}
#line 1 "duk_regexp_compiler.c"
/*
* Regexp compilation.
*
* See doc/regexp.rst for a discussion of the compilation approach and
* current limitations.
*
* Regexp bytecode assumes jumps can be expressed with signed 32-bit
* integers. Consequently the bytecode size must not exceed 0x7fffffffL.
* The implementation casts duk_size_t (buffer size) to duk_(u)int32_t
* in many places. Although this could be changed, the bytecode format
* limit would still prevent regexps exceeding the signed 32-bit limit
* from working.
*
* XXX: The implementation does not prevent bytecode from exceeding the
* maximum supported size. This could be done by limiting the maximum
* input string size (assuming an upper bound can be computed for number
* of bytecode bytes emitted per input byte) or checking buffer maximum
* size when emitting bytecode (slower).
*/
/* include removed: duk_internal.h */
#ifdef DUK_USE_REGEXP_SUPPORT
/*
* Helper macros
*/
#define DUK__RE_INITIAL_BUFSIZE 64
#undef DUK__RE_BUFLEN
#define DUK__RE_BUFLEN(re_ctx) \
DUK_BW_GET_SIZE(re_ctx->thr, &re_ctx->bw)
/*
* Disjunction struct: result of parsing a disjunction
*/
typedef struct {
/* Number of characters that the atom matches (e.g. 3 for 'abc'),
* -1 if atom is complex and number of matched characters either
* varies or is not known.
*/
duk_int32_t charlen;
#if 0
/* These are not needed to implement quantifier capture handling,
* but might be needed at some point.
*/
/* re_ctx->captures at start and end of atom parsing.
* Since 'captures' indicates highest capture number emitted
* so far in a DUK_REOP_SAVE, the captures numbers saved by
* the atom are: ]start_captures,end_captures].
*/
duk_uint32_t start_captures;
duk_uint32_t end_captures;
#endif
} duk__re_disjunction_info;
/*
* Encoding helpers
*
* Some of the typing is bytecode based, e.g. slice sizes are unsigned 32-bit
* even though the buffer operations will use duk_size_t.
*/
/* XXX: the insert helpers should ensure that the bytecode result is not
* larger than expected (or at least assert for it). Many things in the
* bytecode, like skip offsets, won't work correctly if the bytecode is
* larger than say 2G.
*/
DUK_LOCAL duk_uint32_t duk__encode_i32(duk_int32_t x) {
if (x < 0) {
return ((duk_uint32_t) (-x)) * 2 + 1;
} else {
return ((duk_uint32_t) x) * 2;
}
}
/* XXX: return type should probably be duk_size_t, or explicit checks are needed for
* maximum size.
*/
DUK_LOCAL duk_uint32_t duk__insert_u32(duk_re_compiler_ctx *re_ctx, duk_uint32_t offset, duk_uint32_t x) {
duk_uint8_t buf[DUK_UNICODE_MAX_XUTF8_LENGTH];
duk_small_int_t len;
len = duk_unicode_encode_xutf8((duk_ucodepoint_t) x, buf);
DUK_BW_INSERT_ENSURE_BYTES(re_ctx->thr, &re_ctx->bw, offset, buf, len);
return (duk_uint32_t) len;
}
DUK_LOCAL duk_uint32_t duk__append_u32(duk_re_compiler_ctx *re_ctx, duk_uint32_t x) {
duk_uint8_t buf[DUK_UNICODE_MAX_XUTF8_LENGTH];
duk_small_int_t len;
len = duk_unicode_encode_xutf8((duk_ucodepoint_t) x, buf);
DUK_BW_WRITE_ENSURE_BYTES(re_ctx->thr, &re_ctx->bw, buf, len);
return (duk_uint32_t) len;
}
DUK_LOCAL duk_uint32_t duk__insert_i32(duk_re_compiler_ctx *re_ctx, duk_uint32_t offset, duk_int32_t x) {
return duk__insert_u32(re_ctx, offset, duk__encode_i32(x));
}
#if 0 /* unused */
DUK_LOCAL duk_uint32_t duk__append_i32(duk_re_compiler_ctx *re_ctx, duk_int32_t x) {
return duk__append_u32(re_ctx, duk__encode_i32(x));
}
#endif
/* special helper for emitting u16 lists (used for character ranges for built-in char classes) */
DUK_LOCAL void duk__append_u16_list(duk_re_compiler_ctx *re_ctx, const duk_uint16_t *values, duk_uint32_t count) {
/* Call sites don't need the result length so it's not accumulated. */
while (count > 0) {
(void) duk__append_u32(re_ctx, (duk_uint32_t) (*values++));
count--;
}
}
DUK_LOCAL void duk__insert_slice(duk_re_compiler_ctx *re_ctx, duk_uint32_t offset, duk_uint32_t data_offset, duk_uint32_t data_length) {
DUK_BW_INSERT_ENSURE_SLICE(re_ctx->thr, &re_ctx->bw, offset, data_offset, data_length);
}
DUK_LOCAL void duk__append_slice(duk_re_compiler_ctx *re_ctx, duk_uint32_t data_offset, duk_uint32_t data_length) {
DUK_BW_WRITE_ENSURE_SLICE(re_ctx->thr, &re_ctx->bw, data_offset, data_length);
}
DUK_LOCAL void duk__remove_slice(duk_re_compiler_ctx *re_ctx, duk_uint32_t data_offset, duk_uint32_t data_length) {
DUK_BW_REMOVE_ENSURE_SLICE(re_ctx->thr, &re_ctx->bw, data_offset, data_length);
}
/*
* Insert a jump offset at 'offset' to complete an instruction
* (the jump offset is always the last component of an instruction).
* The 'skip' argument must be computed relative to 'offset',
* -without- taking into account the skip field being inserted.
*
* ... A B C ins X Y Z ... (ins may be a JUMP, SPLIT1/SPLIT2, etc)
* => ... A B C ins SKIP X Y Z
*
* Computing the final (adjusted) skip value, which is relative to the
* first byte of the next instruction, is a bit tricky because of the
* variable length UTF-8 encoding. See doc/regexp.rst for discussion.
*/
DUK_LOCAL duk_uint32_t duk__insert_jump_offset(duk_re_compiler_ctx *re_ctx, duk_uint32_t offset, duk_int32_t skip) {
duk_small_int_t len;
/* XXX: solve into closed form (smaller code) */
if (skip < 0) {
/* two encoding attempts suffices */
len = duk_unicode_get_xutf8_length((duk_codepoint_t) duk__encode_i32(skip));
len = duk_unicode_get_xutf8_length((duk_codepoint_t) duk__encode_i32(skip - (duk_int32_t) len));
DUK_ASSERT(duk_unicode_get_xutf8_length(duk__encode_i32(skip - (duk_int32_t) len)) == len); /* no change */
skip -= (duk_int32_t) len;
}
return duk__insert_i32(re_ctx, offset, skip);
}
DUK_LOCAL duk_uint32_t duk__append_jump_offset(duk_re_compiler_ctx *re_ctx, duk_int32_t skip) {
return (duk_uint32_t) duk__insert_jump_offset(re_ctx, (duk_uint32_t) DUK__RE_BUFLEN(re_ctx), skip);
}
/*
* duk_re_range_callback for generating character class ranges.
*
* When ignoreCase is false, the range is simply emitted as is.
* We don't, for instance, eliminate duplicates or overlapping
* ranges in a character class.
*
* When ignoreCase is true, the range needs to be normalized through
* canonicalization. Unfortunately a canonicalized version of a
* continuous range is not necessarily continuous (e.g. [x-{] is
* continuous but [X-{] is not). The current algorithm creates the
* canonicalized range(s) space efficiently at the cost of compile
* time execution time (see doc/regexp.rst for discussion).
*
* Note that the ctx->nranges is a context-wide temporary value
* (this is OK because there cannot be multiple character classes
* being parsed simultaneously).
*/
DUK_LOCAL void duk__generate_ranges(void *userdata, duk_codepoint_t r1, duk_codepoint_t r2, duk_bool_t direct) {
duk_re_compiler_ctx *re_ctx = (duk_re_compiler_ctx *) userdata;
DUK_DD(DUK_DDPRINT("duk__generate_ranges(): re_ctx=%p, range=[%ld,%ld] direct=%ld",
(void *) re_ctx, (long) r1, (long) r2, (long) direct));
if (!direct && (re_ctx->re_flags & DUK_RE_FLAG_IGNORE_CASE)) {
/*
* Canonicalize a range, generating result ranges as necessary.
* Needs to exhaustively scan the entire range (at most 65536
* code points). If 'direct' is set, caller (lexer) has ensured
* that the range is already canonicalization compatible (this
* is used to avoid unnecessary canonicalization of built-in
* ranges like \W, which are not affected by canonicalization).
*
* NOTE: here is one place where we don't want to support chars
* outside the BMP, because the exhaustive search would be
* massively larger.
*/
duk_codepoint_t i;
duk_codepoint_t t;
duk_codepoint_t r_start, r_end;
r_start = duk_unicode_re_canonicalize_char(re_ctx->thr, r1);
r_end = r_start;
for (i = r1 + 1; i <= r2; i++) {
t = duk_unicode_re_canonicalize_char(re_ctx->thr, i);
if (t == r_end + 1) {
r_end = t;
} else {
DUK_DD(DUK_DDPRINT("canonicalized, emit range: [%ld,%ld]", (long) r_start, (long) r_end));
duk__append_u32(re_ctx, (duk_uint32_t) r_start);
duk__append_u32(re_ctx, (duk_uint32_t) r_end);
re_ctx->nranges++;
r_start = t;
r_end = t;
}
}
DUK_DD(DUK_DDPRINT("canonicalized, emit range: [%ld,%ld]", (long) r_start, (long) r_end));
duk__append_u32(re_ctx, (duk_uint32_t) r_start);
duk__append_u32(re_ctx, (duk_uint32_t) r_end);
re_ctx->nranges++;
} else {
DUK_DD(DUK_DDPRINT("direct, emit range: [%ld,%ld]", (long) r1, (long) r2));
duk__append_u32(re_ctx, (duk_uint32_t) r1);
duk__append_u32(re_ctx, (duk_uint32_t) r2);
re_ctx->nranges++;
}
}
/*
* Parse regexp Disjunction. Most of regexp compilation happens here.
*
* Handles Disjunction, Alternative, and Term productions directly without
* recursion. The only constructs requiring recursion are positive/negative
* lookaheads, capturing parentheses, and non-capturing parentheses.
*
* The function determines whether the entire disjunction is a 'simple atom'
* (see doc/regexp.rst discussion on 'simple quantifiers') and if so,
* returns the atom character length which is needed by the caller to keep
* track of its own atom character length. A disjunction with more than one
* alternative is never considered a simple atom (although in some cases
* that might be the case).
*
* Return value: simple atom character length or < 0 if not a simple atom.
* Appends the bytecode for the disjunction matcher to the end of the temp
* buffer.
*
* Regexp top level structure is:
*
* Disjunction = Term*
* | Term* | Disjunction
*
* Term = Assertion
* | Atom
* | Atom Quantifier
*
* An empty Term sequence is a valid disjunction alternative (e.g. /|||c||/).
*
* Notes:
*
* * Tracking of the 'simple-ness' of the current atom vs. the entire
* disjunction are separate matters. For instance, the disjunction
* may be complex, but individual atoms may be simple. Furthermore,
* simple quantifiers are used whenever possible, even if the
* disjunction as a whole is complex.
*
* * The estimate of whether an atom is simple is conservative now,
* and it would be possible to expand it. For instance, captures
* cause the disjunction to be marked complex, even though captures
* -can- be handled by simple quantifiers with some minor modifications.
*
* * Disjunction 'tainting' as 'complex' is handled at the end of the
* main for loop collectively for atoms. Assertions, quantifiers,
* and '|' tokens need to taint the result manually if necessary.
* Assertions cannot add to result char length, only atoms (and
* quantifiers) can; currently quantifiers will taint the result
* as complex though.
*/
DUK_LOCAL void duk__parse_disjunction(duk_re_compiler_ctx *re_ctx, duk_bool_t expect_eof, duk__re_disjunction_info *out_atom_info) {
duk_int32_t atom_start_offset = -1; /* negative -> no atom matched on previous round */
duk_int32_t atom_char_length = 0; /* negative -> complex atom */
duk_uint32_t atom_start_captures = re_ctx->captures; /* value of re_ctx->captures at start of atom */
duk_int32_t unpatched_disjunction_split = -1;
duk_int32_t unpatched_disjunction_jump = -1;
duk_uint32_t entry_offset = (duk_uint32_t) DUK__RE_BUFLEN(re_ctx);
duk_int32_t res_charlen = 0; /* -1 if disjunction is complex, char length if simple */
duk__re_disjunction_info tmp_disj;
DUK_ASSERT(out_atom_info != NULL);
if (re_ctx->recursion_depth >= re_ctx->recursion_limit) {
DUK_ERROR_RANGE(re_ctx->thr, DUK_STR_REGEXP_COMPILER_RECURSION_LIMIT);
}
re_ctx->recursion_depth++;
#if 0
out_atom_info->start_captures = re_ctx->captures;
#endif
for (;;) {
/* atom_char_length, atom_start_offset, atom_start_offset reflect the
* atom matched on the previous loop. If a quantifier is encountered
* on this loop, these are needed to handle the quantifier correctly.
* new_atom_char_length etc are for the atom parsed on this round;
* they're written to atom_char_length etc at the end of the round.
*/
duk_int32_t new_atom_char_length; /* char length of the atom parsed in this loop */
duk_int32_t new_atom_start_offset; /* bytecode start offset of the atom parsed in this loop
* (allows quantifiers to copy the atom bytecode)
*/
duk_uint32_t new_atom_start_captures; /* re_ctx->captures at the start of the atom parsed in this loop */
duk_lexer_parse_re_token(&re_ctx->lex, &re_ctx->curr_token);
DUK_DD(DUK_DDPRINT("re token: %ld (num=%ld, char=%c)",
(long) re_ctx->curr_token.t,
(long) re_ctx->curr_token.num,
(re_ctx->curr_token.num >= 0x20 && re_ctx->curr_token.num <= 0x7e) ?
(int) re_ctx->curr_token.num : (int) '?'));
/* set by atom case clauses */
new_atom_start_offset = -1;
new_atom_char_length = -1;
new_atom_start_captures = re_ctx->captures;
switch (re_ctx->curr_token.t) {
case DUK_RETOK_DISJUNCTION: {
/*
* The handling here is a bit tricky. If a previous '|' has been processed,
* we have a pending split1 and a pending jump (for a previous match). These
* need to be back-patched carefully. See docs for a detailed example.
*/
/* patch pending jump and split */
if (unpatched_disjunction_jump >= 0) {
duk_uint32_t offset;
DUK_ASSERT(unpatched_disjunction_split >= 0);
offset = unpatched_disjunction_jump;
offset += duk__insert_jump_offset(re_ctx,
offset,
(duk_int32_t) (DUK__RE_BUFLEN(re_ctx) - offset));
/* offset is now target of the pending split (right after jump) */
duk__insert_jump_offset(re_ctx,
unpatched_disjunction_split,
offset - unpatched_disjunction_split);
}
/* add a new pending split to the beginning of the entire disjunction */
(void) duk__insert_u32(re_ctx,
entry_offset,
DUK_REOP_SPLIT1); /* prefer direct execution */
unpatched_disjunction_split = entry_offset + 1; /* +1 for opcode */
/* add a new pending match jump for latest finished alternative */
duk__append_u32(re_ctx, DUK_REOP_JUMP);
unpatched_disjunction_jump = (duk_int32_t) DUK__RE_BUFLEN(re_ctx);
/* 'taint' result as complex */
res_charlen = -1;
break;
}
case DUK_RETOK_QUANTIFIER: {
if (atom_start_offset < 0) {
DUK_ERROR_SYNTAX(re_ctx->thr, DUK_STR_INVALID_QUANTIFIER_NO_ATOM);
}
if (re_ctx->curr_token.qmin > re_ctx->curr_token.qmax) {
DUK_ERROR_SYNTAX(re_ctx->thr, DUK_STR_INVALID_QUANTIFIER_VALUES);
}
if (atom_char_length >= 0) {
/*
* Simple atom
*
* If atom_char_length is zero, we'll have unbounded execution time for e.g.
* /()*x/.exec('x'). We can't just skip the match because it might have some
* side effects (for instance, if we allowed captures in simple atoms, the
* capture needs to happen). The simple solution below is to force the
* quantifier to match at most once, since the additional matches have no effect.
*
* With a simple atom there can be no capture groups, so no captures need
* to be reset.
*/
duk_int32_t atom_code_length;
duk_uint32_t offset;
duk_uint32_t qmin, qmax;
qmin = re_ctx->curr_token.qmin;
qmax = re_ctx->curr_token.qmax;
if (atom_char_length == 0) {
/* qmin and qmax will be 0 or 1 */
if (qmin > 1) {
qmin = 1;
}
if (qmax > 1) {
qmax = 1;
}
}
duk__append_u32(re_ctx, DUK_REOP_MATCH); /* complete 'sub atom' */
atom_code_length = (duk_int32_t) (DUK__RE_BUFLEN(re_ctx) - atom_start_offset);
offset = atom_start_offset;
if (re_ctx->curr_token.greedy) {
offset += duk__insert_u32(re_ctx, offset, DUK_REOP_SQGREEDY);
offset += duk__insert_u32(re_ctx, offset, qmin);
offset += duk__insert_u32(re_ctx, offset, qmax);
offset += duk__insert_u32(re_ctx, offset, atom_char_length);
offset += duk__insert_jump_offset(re_ctx, offset, atom_code_length);
} else {
offset += duk__insert_u32(re_ctx, offset, DUK_REOP_SQMINIMAL);
offset += duk__insert_u32(re_ctx, offset, qmin);
offset += duk__insert_u32(re_ctx, offset, qmax);
offset += duk__insert_jump_offset(re_ctx, offset, atom_code_length);
}
DUK_UNREF(offset); /* silence scan-build warning */
} else {
/*
* Complex atom
*
* The original code is used as a template, and removed at the end
* (this differs from the handling of simple quantifiers).
*
* NOTE: there is no current solution for empty atoms in complex
* quantifiers. This would need some sort of a 'progress' instruction.
*
* XXX: impose limit on maximum result size, i.e. atom_code_len * atom_copies?
*/
duk_int32_t atom_code_length;
duk_uint32_t atom_copies;
duk_uint32_t tmp_qmin, tmp_qmax;
/* pre-check how many atom copies we're willing to make (atom_copies not needed below) */
atom_copies = (re_ctx->curr_token.qmax == DUK_RE_QUANTIFIER_INFINITE) ?
re_ctx->curr_token.qmin : re_ctx->curr_token.qmax;
if (atom_copies > DUK_RE_MAX_ATOM_COPIES) {
DUK_ERROR_RANGE(re_ctx->thr, DUK_STR_QUANTIFIER_TOO_MANY_COPIES);
}
/* wipe the capture range made by the atom (if any) */
DUK_ASSERT(atom_start_captures <= re_ctx->captures);
if (atom_start_captures != re_ctx->captures) {
DUK_ASSERT(atom_start_captures < re_ctx->captures);
DUK_DDD(DUK_DDDPRINT("must wipe ]atom_start_captures,re_ctx->captures]: ]%ld,%ld]",
(long) atom_start_captures, (long) re_ctx->captures));
/* insert (DUK_REOP_WIPERANGE, start, count) in reverse order so the order ends up right */
duk__insert_u32(re_ctx, atom_start_offset, (re_ctx->captures - atom_start_captures) * 2);
duk__insert_u32(re_ctx, atom_start_offset, (atom_start_captures + 1) * 2);
duk__insert_u32(re_ctx, atom_start_offset, DUK_REOP_WIPERANGE);
} else {
DUK_DDD(DUK_DDDPRINT("no need to wipe captures: atom_start_captures == re_ctx->captures == %ld",
(long) atom_start_captures));
}
atom_code_length = (duk_int32_t) DUK__RE_BUFLEN(re_ctx) - atom_start_offset;
/* insert the required matches (qmin) by copying the atom */
tmp_qmin = re_ctx->curr_token.qmin;
tmp_qmax = re_ctx->curr_token.qmax;
while (tmp_qmin > 0) {
duk__append_slice(re_ctx, atom_start_offset, atom_code_length);
tmp_qmin--;
if (tmp_qmax != DUK_RE_QUANTIFIER_INFINITE) {
tmp_qmax--;
}
}
DUK_ASSERT(tmp_qmin == 0);
/* insert code for matching the remainder - infinite or finite */
if (tmp_qmax == DUK_RE_QUANTIFIER_INFINITE) {
/* reuse last emitted atom for remaining 'infinite' quantifier */
if (re_ctx->curr_token.qmin == 0) {
/* Special case: original qmin was zero so there is nothing
* to repeat. Emit an atom copy but jump over it here.
*/
duk__append_u32(re_ctx, DUK_REOP_JUMP);
duk__append_jump_offset(re_ctx, atom_code_length);
duk__append_slice(re_ctx, atom_start_offset, atom_code_length);
}
if (re_ctx->curr_token.greedy) {
duk__append_u32(re_ctx, DUK_REOP_SPLIT2); /* prefer jump */
} else {
duk__append_u32(re_ctx, DUK_REOP_SPLIT1); /* prefer direct */
}
duk__append_jump_offset(re_ctx, -atom_code_length - 1); /* -1 for opcode */
} else {
/*
* The remaining matches are emitted as sequence of SPLITs and atom
* copies; the SPLITs skip the remaining copies and match the sequel.
* This sequence needs to be emitted starting from the last copy
* because the SPLITs are variable length due to the variable length
* skip offset. This causes a lot of memory copying now.
*
* Example structure (greedy, match maximum # atoms):
*
* SPLIT1 LSEQ
* (atom)
* SPLIT1 LSEQ ; <- the byte length of this instruction is needed
* (atom) ; to encode the above SPLIT1 correctly
* ...
* LSEQ:
*/
duk_uint32_t offset = (duk_uint32_t) DUK__RE_BUFLEN(re_ctx);
while (tmp_qmax > 0) {
duk__insert_slice(re_ctx, offset, atom_start_offset, atom_code_length);
if (re_ctx->curr_token.greedy) {
duk__insert_u32(re_ctx, offset, DUK_REOP_SPLIT1); /* prefer direct */
} else {
duk__insert_u32(re_ctx, offset, DUK_REOP_SPLIT2); /* prefer jump */
}
duk__insert_jump_offset(re_ctx,
offset + 1, /* +1 for opcode */
(duk_int32_t) (DUK__RE_BUFLEN(re_ctx) - (offset + 1)));
tmp_qmax--;
}
}
/* remove the original 'template' atom */
duk__remove_slice(re_ctx, atom_start_offset, atom_code_length);
}
/* 'taint' result as complex */
res_charlen = -1;
break;
}
case DUK_RETOK_ASSERT_START: {
duk__append_u32(re_ctx, DUK_REOP_ASSERT_START);
break;
}
case DUK_RETOK_ASSERT_END: {
duk__append_u32(re_ctx, DUK_REOP_ASSERT_END);
break;
}
case DUK_RETOK_ASSERT_WORD_BOUNDARY: {
duk__append_u32(re_ctx, DUK_REOP_ASSERT_WORD_BOUNDARY);
break;
}
case DUK_RETOK_ASSERT_NOT_WORD_BOUNDARY: {
duk__append_u32(re_ctx, DUK_REOP_ASSERT_NOT_WORD_BOUNDARY);
break;
}
case DUK_RETOK_ASSERT_START_POS_LOOKAHEAD:
case DUK_RETOK_ASSERT_START_NEG_LOOKAHEAD: {
duk_uint32_t offset;
duk_uint32_t opcode = (re_ctx->curr_token.t == DUK_RETOK_ASSERT_START_POS_LOOKAHEAD) ?
DUK_REOP_LOOKPOS : DUK_REOP_LOOKNEG;
offset = (duk_uint32_t) DUK__RE_BUFLEN(re_ctx);
duk__parse_disjunction(re_ctx, 0, &tmp_disj);
duk__append_u32(re_ctx, DUK_REOP_MATCH);
(void) duk__insert_u32(re_ctx, offset, opcode);
(void) duk__insert_jump_offset(re_ctx,
offset + 1, /* +1 for opcode */
(duk_int32_t) (DUK__RE_BUFLEN(re_ctx) - (offset + 1)));
/* 'taint' result as complex -- this is conservative,
* as lookaheads do not backtrack.
*/
res_charlen = -1;
break;
}
case DUK_RETOK_ATOM_PERIOD: {
new_atom_char_length = 1;
new_atom_start_offset = (duk_int32_t) DUK__RE_BUFLEN(re_ctx);
duk__append_u32(re_ctx, DUK_REOP_PERIOD);
break;
}
case DUK_RETOK_ATOM_CHAR: {
/* Note: successive characters could be joined into string matches
* but this is not trivial (consider e.g. '/xyz+/); see docs for
* more discussion.
*/
duk_uint32_t ch;
new_atom_char_length = 1;
new_atom_start_offset = (duk_int32_t) DUK__RE_BUFLEN(re_ctx);
duk__append_u32(re_ctx, DUK_REOP_CHAR);
ch = re_ctx->curr_token.num;
if (re_ctx->re_flags & DUK_RE_FLAG_IGNORE_CASE) {
ch = duk_unicode_re_canonicalize_char(re_ctx->thr, ch);
}
duk__append_u32(re_ctx, ch);
break;
}
case DUK_RETOK_ATOM_DIGIT:
case DUK_RETOK_ATOM_NOT_DIGIT: {
new_atom_char_length = 1;
new_atom_start_offset = (duk_int32_t) DUK__RE_BUFLEN(re_ctx);
duk__append_u32(re_ctx,
(re_ctx->curr_token.t == DUK_RETOK_ATOM_DIGIT) ?
DUK_REOP_RANGES : DUK_REOP_INVRANGES);
duk__append_u32(re_ctx, sizeof(duk_unicode_re_ranges_digit) / (2 * sizeof(duk_uint16_t)));
duk__append_u16_list(re_ctx, duk_unicode_re_ranges_digit, sizeof(duk_unicode_re_ranges_digit) / sizeof(duk_uint16_t));
break;
}
case DUK_RETOK_ATOM_WHITE:
case DUK_RETOK_ATOM_NOT_WHITE: {
new_atom_char_length = 1;
new_atom_start_offset = (duk_int32_t) DUK__RE_BUFLEN(re_ctx);
duk__append_u32(re_ctx,
(re_ctx->curr_token.t == DUK_RETOK_ATOM_WHITE) ?
DUK_REOP_RANGES : DUK_REOP_INVRANGES);
duk__append_u32(re_ctx, sizeof(duk_unicode_re_ranges_white) / (2 * sizeof(duk_uint16_t)));
duk__append_u16_list(re_ctx, duk_unicode_re_ranges_white, sizeof(duk_unicode_re_ranges_white) / sizeof(duk_uint16_t));
break;
}
case DUK_RETOK_ATOM_WORD_CHAR:
case DUK_RETOK_ATOM_NOT_WORD_CHAR: {
new_atom_char_length = 1;
new_atom_start_offset = (duk_int32_t) DUK__RE_BUFLEN(re_ctx);
duk__append_u32(re_ctx,
(re_ctx->curr_token.t == DUK_RETOK_ATOM_WORD_CHAR) ?
DUK_REOP_RANGES : DUK_REOP_INVRANGES);
duk__append_u32(re_ctx, sizeof(duk_unicode_re_ranges_wordchar) / (2 * sizeof(duk_uint16_t)));
duk__append_u16_list(re_ctx, duk_unicode_re_ranges_wordchar, sizeof(duk_unicode_re_ranges_wordchar) / sizeof(duk_uint16_t));
break;
}
case DUK_RETOK_ATOM_BACKREFERENCE: {
duk_uint32_t backref = (duk_uint32_t) re_ctx->curr_token.num;
if (backref > re_ctx->highest_backref) {
re_ctx->highest_backref = backref;
}
new_atom_char_length = -1; /* mark as complex */
new_atom_start_offset = (duk_int32_t) DUK__RE_BUFLEN(re_ctx);
duk__append_u32(re_ctx, DUK_REOP_BACKREFERENCE);
duk__append_u32(re_ctx, backref);
break;
}
case DUK_RETOK_ATOM_START_CAPTURE_GROUP: {
duk_uint32_t cap;
new_atom_char_length = -1; /* mark as complex (capture handling) */
new_atom_start_offset = (duk_int32_t) DUK__RE_BUFLEN(re_ctx);
cap = ++re_ctx->captures;
duk__append_u32(re_ctx, DUK_REOP_SAVE);
duk__append_u32(re_ctx, cap * 2);
duk__parse_disjunction(re_ctx, 0, &tmp_disj); /* retval (sub-atom char length) unused, tainted as complex above */
duk__append_u32(re_ctx, DUK_REOP_SAVE);
duk__append_u32(re_ctx, cap * 2 + 1);
break;
}
case DUK_RETOK_ATOM_START_NONCAPTURE_GROUP: {
new_atom_start_offset = (duk_int32_t) DUK__RE_BUFLEN(re_ctx);
duk__parse_disjunction(re_ctx, 0, &tmp_disj);
new_atom_char_length = tmp_disj.charlen;
break;
}
case DUK_RETOK_ATOM_START_CHARCLASS:
case DUK_RETOK_ATOM_START_CHARCLASS_INVERTED: {
/*
* Range parsing is done with a special lexer function which calls
* us for every range parsed. This is different from how rest of
* the parsing works, but avoids a heavy, arbitrary size intermediate
* value type to hold the ranges.
*
* Another complication is the handling of character ranges when
* case insensitive matching is used (see docs for discussion).
* The range handler callback given to the lexer takes care of this
* as well.
*
* Note that duplicate ranges are not eliminated when parsing character
* classes, so that canonicalization of
*
* [0-9a-fA-Fx-{]
*
* creates the result (note the duplicate ranges):
*
* [0-9A-FA-FX-Z{-{]
*
* where [x-{] is split as a result of canonicalization. The duplicate
* ranges are not a semantics issue: they work correctly.
*/
duk_uint32_t offset;
DUK_DD(DUK_DDPRINT("character class"));
/* insert ranges instruction, range count patched in later */
new_atom_char_length = 1;
new_atom_start_offset = (duk_int32_t) DUK__RE_BUFLEN(re_ctx);
duk__append_u32(re_ctx,
(re_ctx->curr_token.t == DUK_RETOK_ATOM_START_CHARCLASS) ?
DUK_REOP_RANGES : DUK_REOP_INVRANGES);
offset = (duk_uint32_t) DUK__RE_BUFLEN(re_ctx); /* patch in range count later */
/* parse ranges until character class ends */
re_ctx->nranges = 0; /* note: ctx-wide temporary */
duk_lexer_parse_re_ranges(&re_ctx->lex, duk__generate_ranges, (void *) re_ctx);
/* insert range count */
duk__insert_u32(re_ctx, offset, re_ctx->nranges);
break;
}
case DUK_RETOK_ATOM_END_GROUP: {
if (expect_eof) {
DUK_ERROR_SYNTAX(re_ctx->thr, DUK_STR_UNEXPECTED_CLOSING_PAREN);
}
goto done;
}
case DUK_RETOK_EOF: {
if (!expect_eof) {
DUK_ERROR_SYNTAX(re_ctx->thr, DUK_STR_UNEXPECTED_END_OF_PATTERN);
}
goto done;
}
default: {
DUK_ERROR_SYNTAX(re_ctx->thr, DUK_STR_UNEXPECTED_REGEXP_TOKEN);
}
}
/* a complex (new) atom taints the result */
if (new_atom_start_offset >= 0) {
if (new_atom_char_length < 0) {
res_charlen = -1;
} else if (res_charlen >= 0) {
/* only advance if not tainted */
res_charlen += new_atom_char_length;
}
}
/* record previous atom info in case next token is a quantifier */
atom_start_offset = new_atom_start_offset;
atom_char_length = new_atom_char_length;
atom_start_captures = new_atom_start_captures;
}
done:
/* finish up pending jump and split for last alternative */
if (unpatched_disjunction_jump >= 0) {
duk_uint32_t offset;
DUK_ASSERT(unpatched_disjunction_split >= 0);
offset = unpatched_disjunction_jump;
offset += duk__insert_jump_offset(re_ctx,
offset,
(duk_int32_t) (DUK__RE_BUFLEN(re_ctx) - offset));
/* offset is now target of the pending split (right after jump) */
duk__insert_jump_offset(re_ctx,
unpatched_disjunction_split,
offset - unpatched_disjunction_split);
}
#if 0
out_atom_info->end_captures = re_ctx->captures;
#endif
out_atom_info->charlen = res_charlen;
DUK_DDD(DUK_DDDPRINT("parse disjunction finished: charlen=%ld",
(long) out_atom_info->charlen));
re_ctx->recursion_depth--;
}
/*
* Flags parsing (see E5 Section 15.10.4.1).
*/
DUK_LOCAL duk_uint32_t duk__parse_regexp_flags(duk_hthread *thr, duk_hstring *h) {
const duk_uint8_t *p;
const duk_uint8_t *p_end;
duk_uint32_t flags = 0;
p = DUK_HSTRING_GET_DATA(h);
p_end = p + DUK_HSTRING_GET_BYTELEN(h);
/* Note: can be safely scanned as bytes (undecoded) */
while (p < p_end) {
duk_uint8_t c = *p++;
switch ((int) c) {
case (int) 'g': {
if (flags & DUK_RE_FLAG_GLOBAL) {
goto error;
}
flags |= DUK_RE_FLAG_GLOBAL;
break;
}
case (int) 'i': {
if (flags & DUK_RE_FLAG_IGNORE_CASE) {
goto error;
}
flags |= DUK_RE_FLAG_IGNORE_CASE;
break;
}
case (int) 'm': {
if (flags & DUK_RE_FLAG_MULTILINE) {
goto error;
}
flags |= DUK_RE_FLAG_MULTILINE;
break;
}
default: {
goto error;
}
}
}
return flags;
error:
DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_REGEXP_FLAGS);
return 0; /* never here */
}
/*
* Create escaped RegExp source (E5 Section 15.10.3).
*
* The current approach is to special case the empty RegExp
* ('' -> '(?:)') and otherwise replace unescaped '/' characters
* with '\/' regardless of where they occur in the regexp.
*
* Note that normalization does not seem to be necessary for
* RegExp literals (e.g. '/foo/') because to be acceptable as
* a RegExp literal, the text between forward slashes must
* already match the escaping requirements (e.g. must not contain
* unescaped forward slashes or be empty). Escaping IS needed
* for expressions like 'new Regexp("...", "")' however.
* Currently, we re-escape in either case.
*
* Also note that we process the source here in UTF-8 encoded
* form. This is correct, because any non-ASCII characters are
* passed through without change.
*/
DUK_LOCAL void duk__create_escaped_source(duk_hthread *thr, int idx_pattern) {
duk_context *ctx = (duk_context *) thr;
duk_hstring *h;
const duk_uint8_t *p;
duk_bufwriter_ctx bw_alloc;
duk_bufwriter_ctx *bw;
duk_uint8_t *q;
duk_size_t i, n;
duk_uint_fast8_t c_prev, c;
h = duk_get_hstring(ctx, idx_pattern);
DUK_ASSERT(h != NULL);
p = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h);
n = (duk_size_t) DUK_HSTRING_GET_BYTELEN(h);
if (n == 0) {
/* return '(?:)' */
duk_push_hstring_stridx(ctx, DUK_STRIDX_ESCAPED_EMPTY_REGEXP);
return;
}
bw = &bw_alloc;
DUK_BW_INIT_PUSHBUF(thr, bw, n);
q = DUK_BW_GET_PTR(thr, bw);
c_prev = (duk_uint_fast8_t) 0;
for (i = 0; i < n; i++) {
c = p[i];
q = DUK_BW_ENSURE_RAW(thr, bw, 2, q);
if (c == (duk_uint_fast8_t) '/' && c_prev != (duk_uint_fast8_t) '\\') {
/* Unescaped '/' ANYWHERE in the regexp (in disjunction,
* inside a character class, ...) => same escape works.
*/
*q++ = DUK_ASC_BACKSLASH;
}
*q++ = (duk_uint8_t) c;
c_prev = c;
}
DUK_BW_SETPTR_AND_COMPACT(thr, bw, q);
duk_to_string(ctx, -1); /* -> [ ... escaped_source ] */
}
/*
* Exposed regexp compilation primitive.
*
* Sets up a regexp compilation context, and calls duk__parse_disjunction() to do the
* actual parsing. Handles generation of the compiled regexp header and the
* "boilerplate" capture of the matching substring (save 0 and 1). Also does some
* global level regexp checks after recursive compilation has finished.
*
* An escaped version of the regexp source, suitable for use as a RegExp instance
* 'source' property (see E5 Section 15.10.3), is also left on the stack.
*
* Input stack: [ pattern flags ]
* Output stack: [ bytecode escaped_source ] (both as strings)
*/
DUK_INTERNAL void duk_regexp_compile(duk_hthread *thr) {
duk_context *ctx = (duk_context *) thr;
duk_re_compiler_ctx re_ctx;
duk_lexer_point lex_point;
duk_hstring *h_pattern;
duk_hstring *h_flags;
duk__re_disjunction_info ign_disj;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(ctx != NULL);
/*
* Args validation
*/
/* TypeError if fails */
h_pattern = duk_require_hstring(ctx, -2);
h_flags = duk_require_hstring(ctx, -1);
/*
* Create normalized 'source' property (E5 Section 15.10.3).
*/
/* [ ... pattern flags ] */
duk__create_escaped_source(thr, -2);
/* [ ... pattern flags escaped_source ] */
/*
* Init compilation context
*/
/* [ ... pattern flags escaped_source buffer ] */
DUK_MEMZERO(&re_ctx, sizeof(re_ctx));
DUK_LEXER_INITCTX(&re_ctx.lex); /* duplicate zeroing, expect for (possible) NULL inits */
re_ctx.thr = thr;
re_ctx.lex.thr = thr;
re_ctx.lex.input = DUK_HSTRING_GET_DATA(h_pattern);
re_ctx.lex.input_length = DUK_HSTRING_GET_BYTELEN(h_pattern);
re_ctx.lex.token_limit = DUK_RE_COMPILE_TOKEN_LIMIT;
re_ctx.recursion_limit = DUK_USE_REGEXP_COMPILER_RECLIMIT;
re_ctx.re_flags = duk__parse_regexp_flags(thr, h_flags);
DUK_BW_INIT_PUSHBUF(thr, &re_ctx.bw, DUK__RE_INITIAL_BUFSIZE);
DUK_DD(DUK_DDPRINT("regexp compiler ctx initialized, flags=0x%08lx, recursion_limit=%ld",
(unsigned long) re_ctx.re_flags, (long) re_ctx.recursion_limit));
/*
* Init lexer
*/
lex_point.offset = 0; /* expensive init, just want to fill window */
lex_point.line = 1;
DUK_LEXER_SETPOINT(&re_ctx.lex, &lex_point);
/*
* Compilation
*/
DUK_DD(DUK_DDPRINT("starting regexp compilation"));
duk__append_u32(&re_ctx, DUK_REOP_SAVE);
duk__append_u32(&re_ctx, 0);
duk__parse_disjunction(&re_ctx, 1 /*expect_eof*/, &ign_disj);
duk__append_u32(&re_ctx, DUK_REOP_SAVE);
duk__append_u32(&re_ctx, 1);
duk__append_u32(&re_ctx, DUK_REOP_MATCH);
/*
* Check for invalid backreferences; note that it is NOT an error
* to back-reference a capture group which has not yet been introduced
* in the pattern (as in /\1(foo)/); in fact, the backreference will
* always match! It IS an error to back-reference a capture group
* which will never be introduced in the pattern. Thus, we can check
* for such references only after parsing is complete.
*/
if (re_ctx.highest_backref > re_ctx.captures) {
DUK_ERROR_SYNTAX(thr, DUK_STR_INVALID_BACKREFS);
}
/*
* Emit compiled regexp header: flags, ncaptures
* (insertion order inverted on purpose)
*/
duk__insert_u32(&re_ctx, 0, (re_ctx.captures + 1) * 2);
duk__insert_u32(&re_ctx, 0, re_ctx.re_flags);
/* [ ... pattern flags escaped_source buffer ] */
DUK_BW_COMPACT(thr, &re_ctx.bw);
duk_to_string(ctx, -1); /* coerce to string */
/* [ ... pattern flags escaped_source bytecode ] */
/*
* Finalize stack
*/
duk_remove(ctx, -4); /* -> [ ... flags escaped_source bytecode ] */
duk_remove(ctx, -3); /* -> [ ... escaped_source bytecode ] */
DUK_DD(DUK_DDPRINT("regexp compilation successful, bytecode: %!T, escaped source: %!T",
(duk_tval *) duk_get_tval(ctx, -1), (duk_tval *) duk_get_tval(ctx, -2)));
}
/*
* Create a RegExp instance (E5 Section 15.10.7).
*
* Note: the output stack left by duk_regexp_compile() is directly compatible
* with the input here.
*
* Input stack: [ escaped_source bytecode ] (both as strings)
* Output stack: [ RegExp ]
*/
DUK_INTERNAL void duk_regexp_create_instance(duk_hthread *thr) {
duk_context *ctx = (duk_context *) thr;
duk_hobject *h;
duk_hstring *h_bc;
duk_small_int_t re_flags;
/* [ ... escape_source bytecode ] */
h_bc = duk_get_hstring(ctx, -1);
DUK_ASSERT(h_bc != NULL);
DUK_ASSERT(DUK_HSTRING_GET_BYTELEN(h_bc) >= 1); /* always at least the header */
DUK_ASSERT(DUK_HSTRING_GET_CHARLEN(h_bc) >= 1);
DUK_ASSERT((duk_small_int_t) DUK_HSTRING_GET_DATA(h_bc)[0] < 0x80); /* flags always encodes to 1 byte */
re_flags = (duk_small_int_t) DUK_HSTRING_GET_DATA(h_bc)[0];
/* [ ... escaped_source bytecode ] */
duk_push_object(ctx);
h = duk_get_hobject(ctx, -1);
DUK_ASSERT(h != NULL);
duk_insert(ctx, -3);
/* [ ... regexp_object escaped_source bytecode ] */
DUK_HOBJECT_SET_CLASS_NUMBER(h, DUK_HOBJECT_CLASS_REGEXP);
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, h, thr->builtins[DUK_BIDX_REGEXP_PROTOTYPE]);
duk_xdef_prop_stridx(ctx, -3, DUK_STRIDX_INT_BYTECODE, DUK_PROPDESC_FLAGS_NONE);
/* [ ... regexp_object escaped_source ] */
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_SOURCE, DUK_PROPDESC_FLAGS_NONE);
/* [ ... regexp_object ] */
duk_push_boolean(ctx, (re_flags & DUK_RE_FLAG_GLOBAL));
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_GLOBAL, DUK_PROPDESC_FLAGS_NONE);
duk_push_boolean(ctx, (re_flags & DUK_RE_FLAG_IGNORE_CASE));
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_IGNORE_CASE, DUK_PROPDESC_FLAGS_NONE);
duk_push_boolean(ctx, (re_flags & DUK_RE_FLAG_MULTILINE));
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_MULTILINE, DUK_PROPDESC_FLAGS_NONE);
duk_push_int(ctx, 0);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_LAST_INDEX, DUK_PROPDESC_FLAGS_W);
/* [ ... regexp_object ] */
}
#undef DUK__RE_BUFLEN
#else /* DUK_USE_REGEXP_SUPPORT */
/* regexp support disabled */
#endif /* DUK_USE_REGEXP_SUPPORT */
#line 1 "duk_regexp_executor.c"
/*
* Regexp executor.
*
* Safety: the Ecmascript executor should prevent user from reading and
* replacing regexp bytecode. Even so, the executor must validate all
* memory accesses etc. When an invalid access is detected (e.g. a 'save'
* opcode to invalid, unallocated index) it should fail with an internal
* error but not cause a segmentation fault.
*
* Notes:
*
* - Backtrack counts are limited to unsigned 32 bits but should
* technically be duk_size_t for strings longer than 4G chars.
* This also requires a regexp bytecode change.
*/
/* include removed: duk_internal.h */
#ifdef DUK_USE_REGEXP_SUPPORT
/*
* Helpers for UTF-8 handling
*
* For bytecode readers the duk_uint32_t and duk_int32_t types are correct
* because they're used for more than just codepoints.
*/
DUK_LOCAL duk_uint32_t duk__bc_get_u32(duk_re_matcher_ctx *re_ctx, const duk_uint8_t **pc) {
return (duk_uint32_t) duk_unicode_decode_xutf8_checked(re_ctx->thr, pc, re_ctx->bytecode, re_ctx->bytecode_end);
}
DUK_LOCAL duk_int32_t duk__bc_get_i32(duk_re_matcher_ctx *re_ctx, const duk_uint8_t **pc) {
duk_uint32_t t;
/* signed integer encoding needed to work with UTF-8 */
t = (duk_uint32_t) duk_unicode_decode_xutf8_checked(re_ctx->thr, pc, re_ctx->bytecode, re_ctx->bytecode_end);
if (t & 1) {
return -((duk_int32_t) (t >> 1));
} else {
return (duk_int32_t) (t >> 1);
}
}
DUK_LOCAL const duk_uint8_t *duk__utf8_backtrack(duk_hthread *thr, const duk_uint8_t **ptr, const duk_uint8_t *ptr_start, const duk_uint8_t *ptr_end, duk_uint_fast32_t count) {
const duk_uint8_t *p;
/* Note: allow backtracking from p == ptr_end */
p = *ptr;
if (p < ptr_start || p > ptr_end) {
goto fail;
}
while (count > 0) {
for (;;) {
p--;
if (p < ptr_start) {
goto fail;
}
if ((*p & 0xc0) != 0x80) {
/* utf-8 continuation bytes have the form 10xx xxxx */
break;
}
}
count--;
}
*ptr = p;
return p;
fail:
DUK_ERROR_INTERNAL_DEFMSG(thr);
return NULL; /* never here */
}
DUK_LOCAL const duk_uint8_t *duk__utf8_advance(duk_hthread *thr, const duk_uint8_t **ptr, const duk_uint8_t *ptr_start, const duk_uint8_t *ptr_end, duk_uint_fast32_t count) {
const duk_uint8_t *p;
p = *ptr;
if (p < ptr_start || p >= ptr_end) {
goto fail;
}
while (count > 0) {
for (;;) {
p++;
/* Note: if encoding ends by hitting end of input, we don't check that
* the encoding is valid, we just assume it is.
*/
if (p >= ptr_end || ((*p & 0xc0) != 0x80)) {
/* utf-8 continuation bytes have the form 10xx xxxx */
break;
}
}
count--;
}
*ptr = p;
return p;
fail:
DUK_ERROR_INTERNAL_DEFMSG(thr);
return NULL; /* never here */
}
/*
* Helpers for dealing with the input string
*/
/* Get a (possibly canonicalized) input character from current sp. The input
* itself is never modified, and captures always record non-canonicalized
* characters even in case-insensitive matching.
*/
DUK_LOCAL duk_codepoint_t duk__inp_get_cp(duk_re_matcher_ctx *re_ctx, const duk_uint8_t **sp) {
duk_codepoint_t res = (duk_codepoint_t) duk_unicode_decode_xutf8_checked(re_ctx->thr, sp, re_ctx->input, re_ctx->input_end);
if (re_ctx->re_flags & DUK_RE_FLAG_IGNORE_CASE) {
res = duk_unicode_re_canonicalize_char(re_ctx->thr, res);
}
return res;
}
DUK_LOCAL const duk_uint8_t *duk__inp_backtrack(duk_re_matcher_ctx *re_ctx, const duk_uint8_t **sp, duk_uint_fast32_t count) {
return duk__utf8_backtrack(re_ctx->thr, sp, re_ctx->input, re_ctx->input_end, count);
}
/* Backtrack utf-8 input and return a (possibly canonicalized) input character. */
DUK_LOCAL duk_codepoint_t duk__inp_get_prev_cp(duk_re_matcher_ctx *re_ctx, const duk_uint8_t *sp) {
/* note: caller 'sp' is intentionally not updated here */
(void) duk__inp_backtrack(re_ctx, &sp, (duk_uint_fast32_t) 1);
return duk__inp_get_cp(re_ctx, &sp);
}
/*
* Regexp recursive matching function.
*
* Returns 'sp' on successful match (points to character after last matched one),
* NULL otherwise.
*
* The C recursion depth limit check is only performed in this function, this
* suffices because the function is present in all true recursion required by
* regexp execution.
*/
DUK_LOCAL const duk_uint8_t *duk__match_regexp(duk_re_matcher_ctx *re_ctx, const duk_uint8_t *pc, const duk_uint8_t *sp) {
if (re_ctx->recursion_depth >= re_ctx->recursion_limit) {
DUK_ERROR_RANGE(re_ctx->thr, DUK_STR_REGEXP_EXECUTOR_RECURSION_LIMIT);
}
re_ctx->recursion_depth++;
for (;;) {
duk_small_int_t op;
if (re_ctx->steps_count >= re_ctx->steps_limit) {
DUK_ERROR_RANGE(re_ctx->thr, DUK_STR_REGEXP_EXECUTOR_STEP_LIMIT);
}
re_ctx->steps_count++;
op = (duk_small_int_t) duk__bc_get_u32(re_ctx, &pc);
DUK_DDD(DUK_DDDPRINT("match: rec=%ld, steps=%ld, pc (after op)=%ld, sp=%ld, op=%ld",
(long) re_ctx->recursion_depth,
(long) re_ctx->steps_count,
(long) (pc - re_ctx->bytecode),
(long) (sp - re_ctx->input),
(long) op));
switch (op) {
case DUK_REOP_MATCH: {
goto match;
}
case DUK_REOP_CHAR: {
/*
* Byte-based matching would be possible for case-sensitive
* matching but not for case-insensitive matching. So, we
* match by decoding the input and bytecode character normally.
*
* Bytecode characters are assumed to be already canonicalized.
* Input characters are canonicalized automatically by
* duk__inp_get_cp() if necessary.
*
* There is no opcode for matching multiple characters. The
* regexp compiler has trouble joining strings efficiently
* during compilation. See doc/regexp.rst for more discussion.
*/
duk_codepoint_t c1, c2;
c1 = (duk_codepoint_t) duk__bc_get_u32(re_ctx, &pc);
DUK_ASSERT(!(re_ctx->re_flags & DUK_RE_FLAG_IGNORE_CASE) ||
c1 == duk_unicode_re_canonicalize_char(re_ctx->thr, c1)); /* canonicalized by compiler */
if (sp >= re_ctx->input_end) {
goto fail;
}
c2 = duk__inp_get_cp(re_ctx, &sp);
DUK_DDD(DUK_DDDPRINT("char match, c1=%ld, c2=%ld", (long) c1, (long) c2));
if (c1 != c2) {
goto fail;
}
break;
}
case DUK_REOP_PERIOD: {
duk_codepoint_t c;
if (sp >= re_ctx->input_end) {
goto fail;
}
c = duk__inp_get_cp(re_ctx, &sp);
if (duk_unicode_is_line_terminator(c)) {
/* E5 Sections 15.10.2.8, 7.3 */
goto fail;
}
break;
}
case DUK_REOP_RANGES:
case DUK_REOP_INVRANGES: {
duk_uint32_t n;
duk_codepoint_t c;
duk_small_int_t match;
n = duk__bc_get_u32(re_ctx, &pc);
if (sp >= re_ctx->input_end) {
goto fail;
}
c = duk__inp_get_cp(re_ctx, &sp);
match = 0;
while (n) {
duk_codepoint_t r1, r2;
r1 = (duk_codepoint_t) duk__bc_get_u32(re_ctx, &pc);
r2 = (duk_codepoint_t) duk__bc_get_u32(re_ctx, &pc);
DUK_DDD(DUK_DDDPRINT("matching ranges/invranges, n=%ld, r1=%ld, r2=%ld, c=%ld",
(long) n, (long) r1, (long) r2, (long) c));
if (c >= r1 && c <= r2) {
/* Note: don't bail out early, we must read all the ranges from
* bytecode. Another option is to skip them efficiently after
* breaking out of here. Prefer smallest code.
*/
match = 1;
}
n--;
}
if (op == DUK_REOP_RANGES) {
if (!match) {
goto fail;
}
} else {
DUK_ASSERT(op == DUK_REOP_INVRANGES);
if (match) {
goto fail;
}
}
break;
}
case DUK_REOP_ASSERT_START: {
duk_codepoint_t c;
if (sp <= re_ctx->input) {
break;
}
if (!(re_ctx->re_flags & DUK_RE_FLAG_MULTILINE)) {
goto fail;
}
c = duk__inp_get_prev_cp(re_ctx, sp);
if (duk_unicode_is_line_terminator(c)) {
/* E5 Sections 15.10.2.8, 7.3 */
break;
}
goto fail;
}
case DUK_REOP_ASSERT_END: {
duk_codepoint_t c;
const duk_uint8_t *tmp_sp;
if (sp >= re_ctx->input_end) {
break;
}
if (!(re_ctx->re_flags & DUK_RE_FLAG_MULTILINE)) {
goto fail;
}
tmp_sp = sp;
c = duk__inp_get_cp(re_ctx, &tmp_sp);
if (duk_unicode_is_line_terminator(c)) {
/* E5 Sections 15.10.2.8, 7.3 */
break;
}
goto fail;
}
case DUK_REOP_ASSERT_WORD_BOUNDARY:
case DUK_REOP_ASSERT_NOT_WORD_BOUNDARY: {
/*
* E5 Section 15.10.2.6. The previous and current character
* should -not- be canonicalized as they are now. However,
* canonicalization does not affect the result of IsWordChar()
* (which depends on Unicode characters never canonicalizing
* into ASCII characters) so this does not matter.
*/
duk_small_int_t w1, w2;
if (sp <= re_ctx->input) {
w1 = 0; /* not a wordchar */
} else {
duk_codepoint_t c;
c = duk__inp_get_prev_cp(re_ctx, sp);
w1 = duk_unicode_re_is_wordchar(c);
}
if (sp >= re_ctx->input_end) {
w2 = 0; /* not a wordchar */
} else {
const duk_uint8_t *tmp_sp = sp; /* dummy so sp won't get updated */
duk_codepoint_t c;
c = duk__inp_get_cp(re_ctx, &tmp_sp);
w2 = duk_unicode_re_is_wordchar(c);
}
if (op == DUK_REOP_ASSERT_WORD_BOUNDARY) {
if (w1 == w2) {
goto fail;
}
} else {
DUK_ASSERT(op == DUK_REOP_ASSERT_NOT_WORD_BOUNDARY);
if (w1 != w2) {
goto fail;
}
}
break;
}
case DUK_REOP_JUMP: {
duk_int32_t skip;
skip = duk__bc_get_i32(re_ctx, &pc);
pc += skip;
break;
}
case DUK_REOP_SPLIT1: {
/* split1: prefer direct execution (no jump) */
const duk_uint8_t *sub_sp;
duk_int32_t skip;
skip = duk__bc_get_i32(re_ctx, &pc);
sub_sp = duk__match_regexp(re_ctx, pc, sp);
if (sub_sp) {
sp = sub_sp;
goto match;
}
pc += skip;
break;
}
case DUK_REOP_SPLIT2: {
/* split2: prefer jump execution (not direct) */
const duk_uint8_t *sub_sp;
duk_int32_t skip;
skip = duk__bc_get_i32(re_ctx, &pc);
sub_sp = duk__match_regexp(re_ctx, pc + skip, sp);
if (sub_sp) {
sp = sub_sp;
goto match;
}
break;
}
case DUK_REOP_SQMINIMAL: {
duk_uint32_t q, qmin, qmax;
duk_int32_t skip;
const duk_uint8_t *sub_sp;
qmin = duk__bc_get_u32(re_ctx, &pc);
qmax = duk__bc_get_u32(re_ctx, &pc);
skip = duk__bc_get_i32(re_ctx, &pc);
DUK_DDD(DUK_DDDPRINT("minimal quantifier, qmin=%lu, qmax=%lu, skip=%ld",
(unsigned long) qmin, (unsigned long) qmax, (long) skip));
q = 0;
while (q <= qmax) {
if (q >= qmin) {
sub_sp = duk__match_regexp(re_ctx, pc + skip, sp);
if (sub_sp) {
sp = sub_sp;
goto match;
}
}
sub_sp = duk__match_regexp(re_ctx, pc, sp);
if (!sub_sp) {
break;
}
sp = sub_sp;
q++;
}
goto fail;
}
case DUK_REOP_SQGREEDY: {
duk_uint32_t q, qmin, qmax, atomlen;
duk_int32_t skip;
const duk_uint8_t *sub_sp;
qmin = duk__bc_get_u32(re_ctx, &pc);
qmax = duk__bc_get_u32(re_ctx, &pc);
atomlen = duk__bc_get_u32(re_ctx, &pc);
skip = duk__bc_get_i32(re_ctx, &pc);
DUK_DDD(DUK_DDDPRINT("greedy quantifier, qmin=%lu, qmax=%lu, atomlen=%lu, skip=%ld",
(unsigned long) qmin, (unsigned long) qmax, (unsigned long) atomlen, (long) skip));
q = 0;
while (q < qmax) {
sub_sp = duk__match_regexp(re_ctx, pc, sp);
if (!sub_sp) {
break;
}
sp = sub_sp;
q++;
}
while (q >= qmin) {
sub_sp = duk__match_regexp(re_ctx, pc + skip, sp);
if (sub_sp) {
sp = sub_sp;
goto match;
}
if (q == qmin) {
break;
}
/* Note: if atom were to contain e.g. captures, we would need to
* re-match the atom to get correct captures. Simply quantifiers
* do not allow captures in their atom now, so this is not an issue.
*/
DUK_DDD(DUK_DDDPRINT("greedy quantifier, backtrack %ld characters (atomlen)",
(long) atomlen));
sp = duk__inp_backtrack(re_ctx, &sp, (duk_uint_fast32_t) atomlen);
q--;
}
goto fail;
}
case DUK_REOP_SAVE: {
duk_uint32_t idx;
const duk_uint8_t *old;
const duk_uint8_t *sub_sp;
idx = duk__bc_get_u32(re_ctx, &pc);
if (idx >= re_ctx->nsaved) {
/* idx is unsigned, < 0 check is not necessary */
DUK_D(DUK_DPRINT("internal error, regexp save index insane: idx=%ld", (long) idx));
goto internal_error;
}
old = re_ctx->saved[idx];
re_ctx->saved[idx] = sp;
sub_sp = duk__match_regexp(re_ctx, pc, sp);
if (sub_sp) {
sp = sub_sp;
goto match;
}
re_ctx->saved[idx] = old;
goto fail;
}
case DUK_REOP_WIPERANGE: {
/* Wipe capture range and save old values for backtracking.
*
* XXX: this typically happens with a relatively small idx_count.
* It might be useful to handle cases where the count is small
* (say <= 8) by saving the values in stack instead. This would
* reduce memory churn and improve performance, at the cost of a
* slightly higher code footprint.
*/
duk_uint32_t idx_start, idx_count;
#ifdef DUK_USE_EXPLICIT_NULL_INIT
duk_uint32_t idx_end, idx;
#endif
duk_uint8_t **range_save;
const duk_uint8_t *sub_sp;
idx_start = duk__bc_get_u32(re_ctx, &pc);
idx_count = duk__bc_get_u32(re_ctx, &pc);
DUK_DDD(DUK_DDDPRINT("wipe saved range: start=%ld, count=%ld -> [%ld,%ld] (captures [%ld,%ld])",
(long) idx_start, (long) idx_count,
(long) idx_start, (long) (idx_start + idx_count - 1),
(long) (idx_start / 2), (long) ((idx_start + idx_count - 1) / 2)));
if (idx_start + idx_count > re_ctx->nsaved || idx_count == 0) {
/* idx is unsigned, < 0 check is not necessary */
DUK_D(DUK_DPRINT("internal error, regexp wipe indices insane: idx_start=%ld, idx_count=%ld",
(long) idx_start, (long) idx_count));
goto internal_error;
}
DUK_ASSERT(idx_count > 0);
duk_require_stack((duk_context *) re_ctx->thr, 1);
range_save = (duk_uint8_t **) duk_push_fixed_buffer((duk_context *) re_ctx->thr,
sizeof(duk_uint8_t *) * idx_count);
DUK_ASSERT(range_save != NULL);
DUK_MEMCPY(range_save, re_ctx->saved + idx_start, sizeof(duk_uint8_t *) * idx_count);
#ifdef DUK_USE_EXPLICIT_NULL_INIT
idx_end = idx_start + idx_count;
for (idx = idx_start; idx < idx_end; idx++) {
re_ctx->saved[idx] = NULL;
}
#else
DUK_MEMZERO((void *) (re_ctx->saved + idx_start), sizeof(duk_uint8_t *) * idx_count);
#endif
sub_sp = duk__match_regexp(re_ctx, pc, sp);
if (sub_sp) {
/* match: keep wiped/resaved values */
DUK_DDD(DUK_DDDPRINT("match: keep wiped/resaved values [%ld,%ld] (captures [%ld,%ld])",
(long) idx_start, (long) (idx_start + idx_count - 1),
(long) (idx_start / 2), (long) ((idx_start + idx_count - 1) / 2)));
duk_pop((duk_context *) re_ctx->thr);
sp = sub_sp;
goto match;
}
/* fail: restore saves */
DUK_DDD(DUK_DDDPRINT("fail: restore wiped/resaved values [%ld,%ld] (captures [%ld,%ld])",
(long) idx_start, (long) (idx_start + idx_count - 1),
(long) (idx_start / 2), (long) ((idx_start + idx_count - 1) / 2)));
DUK_MEMCPY((void *) (re_ctx->saved + idx_start),
(const void *) range_save,
sizeof(duk_uint8_t *) * idx_count);
duk_pop((duk_context *) re_ctx->thr);
goto fail;
}
case DUK_REOP_LOOKPOS:
case DUK_REOP_LOOKNEG: {
/*
* Needs a save of multiple saved[] entries depending on what range
* may be overwritten. Because the regexp parser does no such analysis,
* we currently save the entire saved array here. Lookaheads are thus
* a bit expensive. Note that the saved array is not needed for just
* the lookahead sub-match, but for the matching of the entire sequel.
*
* The temporary save buffer is pushed on to the valstack to handle
* errors correctly. Each lookahead causes a C recursion and pushes
* more stuff on the value stack. If the C recursion limit is less
* than the value stack spare, there is no need to check the stack.
* We do so regardless, just in case.
*/
duk_int32_t skip;
duk_uint8_t **full_save;
const duk_uint8_t *sub_sp;
DUK_ASSERT(re_ctx->nsaved > 0);
duk_require_stack((duk_context *) re_ctx->thr, 1);
full_save = (duk_uint8_t **) duk_push_fixed_buffer((duk_context *) re_ctx->thr,
sizeof(duk_uint8_t *) * re_ctx->nsaved);
DUK_ASSERT(full_save != NULL);
DUK_MEMCPY(full_save, re_ctx->saved, sizeof(duk_uint8_t *) * re_ctx->nsaved);
skip = duk__bc_get_i32(re_ctx, &pc);
sub_sp = duk__match_regexp(re_ctx, pc, sp);
if (op == DUK_REOP_LOOKPOS) {
if (!sub_sp) {
goto lookahead_fail;
}
} else {
if (sub_sp) {
goto lookahead_fail;
}
}
sub_sp = duk__match_regexp(re_ctx, pc + skip, sp);
if (sub_sp) {
/* match: keep saves */
duk_pop((duk_context *) re_ctx->thr);
sp = sub_sp;
goto match;
}
/* fall through */
lookahead_fail:
/* fail: restore saves */
DUK_MEMCPY((void *) re_ctx->saved,
(const void *) full_save,
sizeof(duk_uint8_t *) * re_ctx->nsaved);
duk_pop((duk_context *) re_ctx->thr);
goto fail;
}
case DUK_REOP_BACKREFERENCE: {
/*
* Byte matching for back-references would be OK in case-
* sensitive matching. In case-insensitive matching we need
* to canonicalize characters, so back-reference matching needs
* to be done with codepoints instead. So, we just decode
* everything normally here, too.
*
* Note: back-reference index which is 0 or higher than
* NCapturingParens (= number of capturing parens in the
* -entire- regexp) is a compile time error. However, a
* backreference referring to a valid capture which has
* not matched anything always succeeds! See E5 Section
* 15.10.2.9, step 5, sub-step 3.
*/
duk_uint32_t idx;
const duk_uint8_t *p;
idx = duk__bc_get_u32(re_ctx, &pc);
idx = idx << 1; /* backref n -> saved indices [n*2, n*2+1] */
if (idx < 2 || idx + 1 >= re_ctx->nsaved) {
/* regexp compiler should catch these */
DUK_D(DUK_DPRINT("internal error, backreference index insane"));
goto internal_error;
}
if (!re_ctx->saved[idx] || !re_ctx->saved[idx+1]) {
/* capture is 'undefined', always matches! */
DUK_DDD(DUK_DDDPRINT("backreference: saved[%ld,%ld] not complete, always match",
(long) idx, (long) (idx + 1)));
break;
}
DUK_DDD(DUK_DDDPRINT("backreference: match saved[%ld,%ld]", (long) idx, (long) (idx + 1)));
p = re_ctx->saved[idx];
while (p < re_ctx->saved[idx+1]) {
duk_codepoint_t c1, c2;
/* Note: not necessary to check p against re_ctx->input_end:
* the memory access is checked by duk__inp_get_cp(), while
* valid compiled regexps cannot write a saved[] entry
* which points to outside the string.
*/
if (sp >= re_ctx->input_end) {
goto fail;
}
c1 = duk__inp_get_cp(re_ctx, &p);
c2 = duk__inp_get_cp(re_ctx, &sp);
if (c1 != c2) {
goto fail;
}
}
break;
}
default: {
DUK_D(DUK_DPRINT("internal error, regexp opcode error: %ld", (long) op));
goto internal_error;
}
}
}
match:
re_ctx->recursion_depth--;
return sp;
fail:
re_ctx->recursion_depth--;
return NULL;
internal_error:
DUK_ERROR_INTERNAL_DEFMSG(re_ctx->thr);
return NULL; /* never here */
}
/*
* Exposed matcher function which provides the semantics of RegExp.prototype.exec().
*
* RegExp.prototype.test() has the same semantics as exec() but does not return the
* result object (which contains the matching string and capture groups). Currently
* there is no separate test() helper, so a temporary result object is created and
* discarded if test() is needed. This is intentional, to save code space.
*
* Input stack: [ ... re_obj input ]
* Output stack: [ ... result ]
*/
DUK_LOCAL void duk__regexp_match_helper(duk_hthread *thr, duk_small_int_t force_global) {
duk_context *ctx = (duk_context *) thr;
duk_re_matcher_ctx re_ctx;
duk_hobject *h_regexp;
duk_hstring *h_bytecode;
duk_hstring *h_input;
const duk_uint8_t *pc;
const duk_uint8_t *sp;
duk_small_int_t match = 0;
duk_small_int_t global;
duk_uint_fast32_t i;
double d;
duk_uint32_t char_offset;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(ctx != NULL);
DUK_DD(DUK_DDPRINT("regexp match: regexp=%!T, input=%!T",
(duk_tval *) duk_get_tval(ctx, -2),
(duk_tval *) duk_get_tval(ctx, -1)));
/*
* Regexp instance check, bytecode check, input coercion.
*
* See E5 Section 15.10.6.
*/
/* TypeError if wrong; class check, see E5 Section 15.10.6 */
h_regexp = duk_require_hobject_with_class(ctx, -2, DUK_HOBJECT_CLASS_REGEXP);
DUK_ASSERT(h_regexp != NULL);
DUK_ASSERT(DUK_HOBJECT_GET_CLASS_NUMBER(h_regexp) == DUK_HOBJECT_CLASS_REGEXP);
DUK_UNREF(h_regexp);
duk_to_string(ctx, -1);
h_input = duk_get_hstring(ctx, -1);
DUK_ASSERT(h_input != NULL);
duk_get_prop_stridx(ctx, -2, DUK_STRIDX_INT_BYTECODE); /* [ ... re_obj input ] -> [ ... re_obj input bc ] */
h_bytecode = duk_require_hstring(ctx, -1); /* no regexp instance should exist without a non-configurable bytecode property */
DUK_ASSERT(h_bytecode != NULL);
/*
* Basic context initialization.
*
* Some init values are read from the bytecode header
* whose format is (UTF-8 codepoints):
*
* uint flags
* uint nsaved (even, 2n+2 where n = num captures)
*/
/* [ ... re_obj input bc ] */
DUK_MEMZERO(&re_ctx, sizeof(re_ctx));
re_ctx.thr = thr;
re_ctx.input = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_input);
re_ctx.input_end = re_ctx.input + DUK_HSTRING_GET_BYTELEN(h_input);
re_ctx.bytecode = (const duk_uint8_t *) DUK_HSTRING_GET_DATA(h_bytecode);
re_ctx.bytecode_end = re_ctx.bytecode + DUK_HSTRING_GET_BYTELEN(h_bytecode);
re_ctx.saved = NULL;
re_ctx.recursion_limit = DUK_USE_REGEXP_EXECUTOR_RECLIMIT;
re_ctx.steps_limit = DUK_RE_EXECUTE_STEPS_LIMIT;
/* read header */
pc = re_ctx.bytecode;
re_ctx.re_flags = duk__bc_get_u32(&re_ctx, &pc);
re_ctx.nsaved = duk__bc_get_u32(&re_ctx, &pc);
re_ctx.bytecode = pc;
DUK_ASSERT(DUK_RE_FLAG_GLOBAL < 0x10000UL); /* must fit into duk_small_int_t */
global = (duk_small_int_t) (force_global | (re_ctx.re_flags & DUK_RE_FLAG_GLOBAL));
DUK_ASSERT(re_ctx.nsaved >= 2);
DUK_ASSERT((re_ctx.nsaved % 2) == 0);
duk_push_fixed_buffer(ctx, sizeof(duk_uint8_t *) * re_ctx.nsaved);
re_ctx.saved = (const duk_uint8_t **) duk_get_buffer(ctx, -1, NULL);
DUK_ASSERT(re_ctx.saved != NULL);
/* [ ... re_obj input bc saved_buf ] */
/* buffer is automatically zeroed */
#ifdef DUK_USE_EXPLICIT_NULL_INIT
for (i = 0; i < re_ctx.nsaved; i++) {
re_ctx.saved[i] = (duk_uint8_t *) NULL;
}
#endif
DUK_DDD(DUK_DDDPRINT("regexp ctx initialized, flags=0x%08lx, nsaved=%ld, recursion_limit=%ld, steps_limit=%ld",
(unsigned long) re_ctx.re_flags, (long) re_ctx.nsaved, (long) re_ctx.recursion_limit,
(long) re_ctx.steps_limit));
/*
* Get starting character offset for match, and initialize 'sp' based on it.
*
* Note: lastIndex is non-configurable so it must be present (we check the
* internal class of the object above, so we know it is). User code can set
* its value to an arbitrary (garbage) value though; E5 requires that lastIndex
* be coerced to a number before using. The code below works even if the
* property is missing: the value will then be coerced to zero.
*
* Note: lastIndex may be outside Uint32 range even after ToInteger() coercion.
* For instance, ToInteger(+Infinity) = +Infinity. We track the match offset
* as an integer, but pre-check it to be inside the 32-bit range before the loop.
* If not, the check in E5 Section 15.10.6.2, step 9.a applies.
*/
/* XXX: lastIndex handling produces a lot of asm */
/* [ ... re_obj input bc saved_buf ] */
duk_get_prop_stridx(ctx, -4, DUK_STRIDX_LAST_INDEX); /* -> [ ... re_obj input bc saved_buf lastIndex ] */
(void) duk_to_int(ctx, -1); /* ToInteger(lastIndex) */
d = duk_get_number(ctx, -1); /* integer, but may be +/- Infinite, +/- zero (not NaN, though) */
duk_pop(ctx);
if (global) {
if (d < 0.0 || d > (double) DUK_HSTRING_GET_CHARLEN(h_input)) {
/* match fail */
char_offset = 0; /* not really necessary */
DUK_ASSERT(match == 0);
goto match_over;
}
char_offset = (duk_uint32_t) d;
} else {
/* lastIndex must be ignored for non-global regexps, but get the
* value for (theoretical) side effects. No side effects can
* really occur, because lastIndex is a normal property and is
* always non-configurable for RegExp instances.
*/
char_offset = (duk_uint32_t) 0;
}
sp = re_ctx.input + duk_heap_strcache_offset_char2byte(thr, h_input, char_offset);
/*
* Match loop.
*
* Try matching at different offsets until match found or input exhausted.
*/
/* [ ... re_obj input bc saved_buf ] */
DUK_ASSERT(match == 0);
for (;;) {
/* char offset in [0, h_input->clen] (both ends inclusive), checked before entry */
DUK_ASSERT_DISABLE(char_offset >= 0);
DUK_ASSERT(char_offset <= DUK_HSTRING_GET_CHARLEN(h_input));
/* Note: ctx.steps is intentionally not reset, it applies to the entire unanchored match */
DUK_ASSERT(re_ctx.recursion_depth == 0);
DUK_DDD(DUK_DDDPRINT("attempt match at char offset %ld; %p [%p,%p]",
(long) char_offset, (const void *) sp,
(const void *) re_ctx.input, (const void *) re_ctx.input_end));
/*
* Note:
*
* - duk__match_regexp() is required not to longjmp() in ordinary "non-match"
* conditions; a longjmp() will terminate the entire matching process.
*
* - Clearing saved[] is not necessary because backtracking does it
*
* - Backtracking also rewinds ctx.recursion back to zero, unless an
* internal/limit error occurs (which causes a longjmp())
*
* - If we supported anchored matches, we would break out here
* unconditionally; however, Ecmascript regexps don't have anchored
* matches. It might make sense to implement a fast bail-out if
* the regexp begins with '^' and sp is not 0: currently we'll just
* run through the entire input string, trivially failing the match
* at every non-zero offset.
*/
if (duk__match_regexp(&re_ctx, re_ctx.bytecode, sp) != NULL) {
DUK_DDD(DUK_DDDPRINT("match at offset %ld", (long) char_offset));
match = 1;
break;
}
/* advance by one character (code point) and one char_offset */
char_offset++;
if (char_offset > DUK_HSTRING_GET_CHARLEN(h_input)) {
/*
* Note:
*
* - Intentionally attempt (empty) match at char_offset == k_input->clen
*
* - Negative char_offsets have been eliminated and char_offset is duk_uint32_t
* -> no need or use for a negative check
*/
DUK_DDD(DUK_DDDPRINT("no match after trying all sp offsets"));
break;
}
/* avoid calling at end of input, will DUK_ERROR (above check suffices to avoid this) */
(void) duk__utf8_advance(thr, &sp, re_ctx.input, re_ctx.input_end, (duk_uint_fast32_t) 1);
}
match_over:
/*
* Matching complete, create result array or return a 'null'. Update lastIndex
* if necessary. See E5 Section 15.10.6.2.
*
* Because lastIndex is a character (not byte) offset, we need the character
* length of the match which we conveniently get as a side effect of interning
* the matching substring (0th index of result array).
*
* saved[0] start pointer (~ byte offset) of current match
* saved[1] end pointer (~ byte offset) of current match (exclusive)
* char_offset start character offset of current match (-> .index of result)
* char_end_offset end character offset (computed below)
*/
/* [ ... re_obj input bc saved_buf ] */
if (match) {
#ifdef DUK_USE_ASSERTIONS
duk_hobject *h_res;
#endif
duk_uint32_t char_end_offset = 0;
DUK_DDD(DUK_DDDPRINT("regexp matches at char_offset %ld", (long) char_offset));
DUK_ASSERT(re_ctx.nsaved >= 2); /* must have start and end */
DUK_ASSERT((re_ctx.nsaved % 2) == 0); /* and even number */
/* XXX: Array size is known before and (2 * re_ctx.nsaved) but not taken
* advantage of now. The array is not compacted either, as regexp match
* objects are usually short lived.
*/
duk_push_array(ctx);
#ifdef DUK_USE_ASSERTIONS
h_res = duk_require_hobject(ctx, -1);
DUK_ASSERT(DUK_HOBJECT_HAS_EXTENSIBLE(h_res));
DUK_ASSERT(DUK_HOBJECT_HAS_EXOTIC_ARRAY(h_res));
DUK_ASSERT(DUK_HOBJECT_GET_CLASS_NUMBER(h_res) == DUK_HOBJECT_CLASS_ARRAY);
#endif
/* [ ... re_obj input bc saved_buf res_obj ] */
duk_push_u32(ctx, char_offset);
duk_xdef_prop_stridx_wec(ctx, -2, DUK_STRIDX_INDEX);
duk_dup(ctx, -4);
duk_xdef_prop_stridx_wec(ctx, -2, DUK_STRIDX_INPUT);
for (i = 0; i < re_ctx.nsaved; i += 2) {
/* Captures which are undefined have NULL pointers and are returned
* as 'undefined'. The same is done when saved[] pointers are insane
* (this should, of course, never happen in practice).
*/
if (re_ctx.saved[i] && re_ctx.saved[i+1] && re_ctx.saved[i+1] >= re_ctx.saved[i]) {
duk_hstring *h_saved;
duk_push_lstring(ctx,
(const char *) re_ctx.saved[i],
(duk_size_t) (re_ctx.saved[i+1] - re_ctx.saved[i]));
h_saved = duk_get_hstring(ctx, -1);
DUK_ASSERT(h_saved != NULL);
if (i == 0) {
/* Assumes that saved[0] and saved[1] are always
* set by regexp bytecode (if not, char_end_offset
* will be zero). Also assumes clen reflects the
* correct char length.
*/
char_end_offset = char_offset + DUK_HSTRING_GET_CHARLEN(h_saved);
}
} else {
duk_push_undefined(ctx);
}
/* [ ... re_obj input bc saved_buf res_obj val ] */
duk_put_prop_index(ctx, -2, i / 2);
}
/* [ ... re_obj input bc saved_buf res_obj ] */
/* NB: 'length' property is automatically updated by the array setup loop */
if (global) {
/* global regexp: lastIndex updated on match */
duk_push_u32(ctx, char_end_offset);
duk_put_prop_stridx(ctx, -6, DUK_STRIDX_LAST_INDEX);
} else {
/* non-global regexp: lastIndex never updated on match */
;
}
} else {
/*
* No match, E5 Section 15.10.6.2, step 9.a.i - 9.a.ii apply, regardless
* of 'global' flag of the RegExp. In particular, if lastIndex is invalid
* initially, it is reset to zero.
*/
DUK_DDD(DUK_DDDPRINT("regexp does not match"));
duk_push_null(ctx);
/* [ ... re_obj input bc saved_buf res_obj ] */
duk_push_int(ctx, 0);
duk_put_prop_stridx(ctx, -6, DUK_STRIDX_LAST_INDEX);
}
/* [ ... re_obj input bc saved_buf res_obj ] */
duk_insert(ctx, -5);
/* [ ... res_obj re_obj input bc saved_buf ] */
duk_pop_n(ctx, 4);
/* [ ... res_obj ] */
/* XXX: these last tricks are unnecessary if the function is made
* a genuine native function.
*/
}
DUK_INTERNAL void duk_regexp_match(duk_hthread *thr) {
duk__regexp_match_helper(thr, 0 /*force_global*/);
}
/* This variant is needed by String.prototype.split(); it needs to perform
* global-style matching on a cloned RegExp which is potentially non-global.
*/
DUK_INTERNAL void duk_regexp_match_force_global(duk_hthread *thr) {
duk__regexp_match_helper(thr, 1 /*force_global*/);
}
#else /* DUK_USE_REGEXP_SUPPORT */
/* regexp support disabled */
#endif /* DUK_USE_REGEXP_SUPPORT */
#line 1 "duk_selftest.c"
/*
* Self tests to ensure execution environment is sane. Intended to catch
* compiler/platform problems which cannot be detected at compile time.
*/
/* include removed: duk_internal.h */
#if defined(DUK_USE_SELF_TESTS)
/*
* Unions and structs for self tests
*/
typedef union {
double d;
duk_uint8_t c[8];
} duk__test_double_union;
#define DUK__DBLUNION_CMP_TRUE(a,b) do { \
if (DUK_MEMCMP((const void *) (a), (const void *) (b), sizeof(duk__test_double_union)) != 0) { \
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: double union compares false (expected true)"); \
} \
} while (0)
#define DUK__DBLUNION_CMP_FALSE(a,b) do { \
if (DUK_MEMCMP((const void *) (a), (const void *) (b), sizeof(duk__test_double_union)) == 0) { \
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: double union compares true (expected false)"); \
} \
} while (0)
typedef union {
duk_uint32_t i;
duk_uint8_t c[8];
} duk__test_u32_union;
/*
* Various sanity checks for typing
*/
DUK_LOCAL void duk__selftest_types(void) {
if (!(sizeof(duk_int8_t) == 1 &&
sizeof(duk_uint8_t) == 1 &&
sizeof(duk_int16_t) == 2 &&
sizeof(duk_uint16_t) == 2 &&
sizeof(duk_int32_t) == 4 &&
sizeof(duk_uint32_t) == 4)) {
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: duk_(u)int{8,16,32}_t size");
}
#if defined(DUK_USE_64BIT_OPS)
if (!(sizeof(duk_int64_t) == 8 &&
sizeof(duk_uint64_t) == 8)) {
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: duk_(u)int64_t size");
}
#endif
if (!(sizeof(duk_size_t) >= sizeof(duk_uint_t))) {
/* Some internal code now assumes that all duk_uint_t values
* can be expressed with a duk_size_t.
*/
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: duk_size_t is smaller than duk_uint_t");
}
if (!(sizeof(duk_int_t) >= 4)) {
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: duk_int_t is not 32 bits");
}
}
/*
* Packed tval sanity
*/
DUK_LOCAL void duk__selftest_packed_tval(void) {
#if defined(DUK_USE_PACKED_TVAL)
if (sizeof(void *) > 4) {
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: packed duk_tval in use but sizeof(void *) > 4");
}
#endif
}
/*
* Two's complement arithmetic.
*/
DUK_LOCAL void duk__selftest_twos_complement(void) {
volatile int test;
test = -1;
/* Note that byte order doesn't affect this test: all bytes in
* 'test' will be 0xFF for two's complement.
*/
if (((volatile duk_uint8_t *) &test)[0] != (duk_uint8_t) 0xff) {
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: two's complement arithmetic");
}
}
/*
* Byte order. Important to self check, because on some exotic platforms
* there is no actual detection but rather assumption based on platform
* defines.
*/
DUK_LOCAL void duk__selftest_byte_order(void) {
duk__test_u32_union u1;
duk__test_double_union u2;
/*
* >>> struct.pack('>d', 102030405060).encode('hex')
* '4237c17c6dc40000'
*/
#if defined(DUK_USE_INTEGER_LE)
u1.c[0] = 0xef; u1.c[1] = 0xbe; u1.c[2] = 0xad; u1.c[3] = 0xde;
#elif defined(DUK_USE_INTEGER_ME)
#error integer mixed endian not supported now
#elif defined(DUK_USE_INTEGER_BE)
u1.c[0] = 0xde; u1.c[1] = 0xad; u1.c[2] = 0xbe; u1.c[3] = 0xef;
#else
#error unknown integer endianness
#endif
#if defined(DUK_USE_DOUBLE_LE)
u2.c[0] = 0x00; u2.c[1] = 0x00; u2.c[2] = 0xc4; u2.c[3] = 0x6d;
u2.c[4] = 0x7c; u2.c[5] = 0xc1; u2.c[6] = 0x37; u2.c[7] = 0x42;
#elif defined(DUK_USE_DOUBLE_ME)
u2.c[0] = 0x7c; u2.c[1] = 0xc1; u2.c[2] = 0x37; u2.c[3] = 0x42;
u2.c[4] = 0x00; u2.c[5] = 0x00; u2.c[6] = 0xc4; u2.c[7] = 0x6d;
#elif defined(DUK_USE_DOUBLE_BE)
u2.c[0] = 0x42; u2.c[1] = 0x37; u2.c[2] = 0xc1; u2.c[3] = 0x7c;
u2.c[4] = 0x6d; u2.c[5] = 0xc4; u2.c[6] = 0x00; u2.c[7] = 0x00;
#else
#error unknown double endianness
#endif
if (u1.i != (duk_uint32_t) 0xdeadbeefUL) {
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: duk_uint32_t byte order");
}
if (u2.d != (double) 102030405060.0) {
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: double byte order");
}
}
/*
* DUK_BSWAP macros
*/
DUK_LOCAL void duk__selftest_bswap_macros(void) {
duk_uint32_t x32;
duk_uint16_t x16;
duk_double_union du;
duk_double_t du_diff;
x16 = 0xbeefUL;
x16 = DUK_BSWAP16(x16);
if (x16 != (duk_uint16_t) 0xefbeUL) {
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: DUK_BSWAP16");
}
x32 = 0xdeadbeefUL;
x32 = DUK_BSWAP32(x32);
if (x32 != (duk_uint32_t) 0xefbeaddeUL) {
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: DUK_BSWAP32");
}
/* >>> struct.unpack('>d', '4000112233445566'.decode('hex'))
* (2.008366013071895,)
*/
du.uc[0] = 0x40; du.uc[1] = 0x00; du.uc[2] = 0x11; du.uc[3] = 0x22;
du.uc[4] = 0x33; du.uc[5] = 0x44; du.uc[6] = 0x55; du.uc[7] = 0x66;
DUK_DBLUNION_DOUBLE_NTOH(&du);
du_diff = du.d - 2.008366013071895;
#if 0
DUK_FPRINTF(DUK_STDERR, "du_diff: %lg\n", (double) du_diff);
#endif
if (du_diff > 1e-15) {
/* Allow very small lenience because some compilers won't parse
* exact IEEE double constants (happened in matrix testing with
* Linux gcc-4.8 -m32 at least).
*/
#if 0
DUK_FPRINTF(DUK_STDERR, "Result of DUK_DBLUNION_DOUBLE_NTOH: %02x %02x %02x %02x %02x %02x %02x %02x\n",
(unsigned int) du.uc[0], (unsigned int) du.uc[1],
(unsigned int) du.uc[2], (unsigned int) du.uc[3],
(unsigned int) du.uc[4], (unsigned int) du.uc[5],
(unsigned int) du.uc[6], (unsigned int) du.uc[7]);
#endif
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: DUK_DBLUNION_DOUBLE_NTOH");
}
}
/*
* Basic double / byte union memory layout.
*/
DUK_LOCAL void duk__selftest_double_union_size(void) {
if (sizeof(duk__test_double_union) != 8) {
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: invalid union size");
}
}
/*
* Union aliasing, see misc/clang_aliasing.c.
*/
DUK_LOCAL void duk__selftest_double_aliasing(void) {
duk__test_double_union a, b;
/* This testcase fails when Emscripten-generated code runs on Firefox.
* It's not an issue because the failure should only affect packed
* duk_tval representation, which is not used with Emscripten.
*/
#if !defined(DUK_USE_PACKED_TVAL)
DUK_D(DUK_DPRINT("skip double aliasing self test when duk_tval is not packed"));
return;
#endif
/* Test signaling NaN and alias assignment in all endianness combinations.
*/
/* little endian */
a.c[0] = 0x11; a.c[1] = 0x22; a.c[2] = 0x33; a.c[3] = 0x44;
a.c[4] = 0x00; a.c[5] = 0x00; a.c[6] = 0xf1; a.c[7] = 0xff;
b = a;
DUK__DBLUNION_CMP_TRUE(&a, &b);
/* big endian */
a.c[0] = 0xff; a.c[1] = 0xf1; a.c[2] = 0x00; a.c[3] = 0x00;
a.c[4] = 0x44; a.c[5] = 0x33; a.c[6] = 0x22; a.c[7] = 0x11;
b = a;
DUK__DBLUNION_CMP_TRUE(&a, &b);
/* mixed endian */
a.c[0] = 0x00; a.c[1] = 0x00; a.c[2] = 0xf1; a.c[3] = 0xff;
a.c[4] = 0x11; a.c[5] = 0x22; a.c[6] = 0x33; a.c[7] = 0x44;
b = a;
DUK__DBLUNION_CMP_TRUE(&a, &b);
}
/*
* Zero sign, see misc/tcc_zerosign2.c.
*/
DUK_LOCAL void duk__selftest_double_zero_sign(void) {
duk__test_double_union a, b;
a.d = 0.0;
b.d = -a.d;
DUK__DBLUNION_CMP_FALSE(&a, &b);
}
/*
* Struct size/alignment if platform requires it
*
* There are some compiler specific struct padding pragmas etc in use, this
* selftest ensures they're correctly detected and used.
*/
DUK_LOCAL void duk__selftest_struct_align(void) {
#if (DUK_USE_ALIGN_BY == 4)
if ((sizeof(duk_hbuffer_fixed) % 4) != 0) {
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: sizeof(duk_hbuffer_fixed) not aligned to 4");
}
#elif (DUK_USE_ALIGN_BY == 8)
if ((sizeof(duk_hbuffer_fixed) % 8) != 0) {
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: sizeof(duk_hbuffer_fixed) not aligned to 8");
}
#elif (DUK_USE_ALIGN_BY == 1)
/* no check */
#else
#error invalid DUK_USE_ALIGN_BY
#endif
}
/*
* 64-bit arithmetic
*
* There are some platforms/compilers where 64-bit types are available
* but don't work correctly. Test for known cases.
*/
DUK_LOCAL void duk__selftest_64bit_arithmetic(void) {
#if defined(DUK_USE_64BIT_OPS)
volatile duk_int64_t i;
volatile duk_double_t d;
/* Catch a double-to-int64 cast issue encountered in practice. */
d = 2147483648.0;
i = (duk_int64_t) d;
if (i != 0x80000000LL) {
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: casting 2147483648.0 to duk_int64_t failed");
}
#else
/* nop */
#endif
}
/*
* Casting
*/
DUK_LOCAL void duk__selftest_cast_double_to_small_uint(void) {
/*
* https://github.com/svaarala/duktape/issues/127#issuecomment-77863473
*/
duk_double_t d1, d2;
duk_small_uint_t u;
duk_double_t d1v, d2v;
duk_small_uint_t uv;
/* Test without volatiles */
d1 = 1.0;
u = (duk_small_uint_t) d1;
d2 = (duk_double_t) u;
if (!(d1 == 1.0 && u == 1 && d2 == 1.0 && d1 == d2)) {
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: double to duk_small_uint_t cast failed");
}
/* Same test with volatiles */
d1v = 1.0;
uv = (duk_small_uint_t) d1v;
d2v = (duk_double_t) uv;
if (!(d1v == 1.0 && uv == 1 && d2v == 1.0 && d1v == d2v)) {
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: double to duk_small_uint_t cast failed");
}
}
DUK_LOCAL void duk__selftest_cast_double_to_uint32(void) {
/*
* This test fails on an exotic ARM target; double-to-uint
* cast is incorrectly clamped to -signed- int highest value.
*
* https://github.com/svaarala/duktape/issues/336
*/
duk_double_t dv;
duk_uint32_t uv;
dv = 3735928559.0; /* 0xdeadbeef in decimal */
uv = (duk_uint32_t) dv;
if (uv != 0xdeadbeefUL) {
DUK_PANIC(DUK_ERR_INTERNAL_ERROR, "self test failed: double to duk_uint32_t cast failed");
}
}
/*
* Self test main
*/
DUK_INTERNAL void duk_selftest_run_tests(void) {
duk__selftest_types();
duk__selftest_packed_tval();
duk__selftest_twos_complement();
duk__selftest_byte_order();
duk__selftest_bswap_macros();
duk__selftest_double_union_size();
duk__selftest_double_aliasing();
duk__selftest_double_zero_sign();
duk__selftest_struct_align();
duk__selftest_64bit_arithmetic();
duk__selftest_cast_double_to_small_uint();
duk__selftest_cast_double_to_uint32();
}
#undef DUK__DBLUNION_CMP_TRUE
#undef DUK__DBLUNION_CMP_FALSE
#endif /* DUK_USE_SELF_TESTS */
/* include removed: duk_internal.h */
#line 2 "duk_tval.c"
#if defined(DUK_USE_FASTINT)
/*
* Manually optimized double-to-fastint downgrade check.
*
* This check has a large impact on performance, especially for fastint
* slow paths, so must be changed carefully. The code should probably be
* optimized for the case where the result does not fit into a fastint,
* to minimize the penalty for "slow path code" dealing with fractions etc.
*
* At least on one tested soft float ARM platform double-to-int64 coercion
* is very slow (and sometimes produces incorrect results, see self tests).
* This algorithm combines a fastint compatibility check and extracting the
* integer value from an IEEE double for setting the tagged fastint. For
* other platforms a more naive approach might be better.
*
* See doc/fastint.rst for details.
*/
DUK_INTERNAL DUK_ALWAYS_INLINE void duk_tval_set_number_chkfast(duk_tval *tv, duk_double_t x) {
duk_double_union du;
duk_int64_t i;
duk_small_int_t expt;
duk_small_int_t shift;
/* XXX: optimize for packed duk_tval directly? */
du.d = x;
i = (duk_int64_t) DUK_DBLUNION_GET_INT64(&du);
expt = (duk_small_int_t) ((i >> 52) & 0x07ff);
shift = expt - 1023;
if (shift >= 0 && shift <= 46) { /* exponents 1023 to 1069 */
duk_int64_t t;
if (((0x000fffffffffffffLL >> shift) & i) == 0) {
t = i | 0x0010000000000000LL; /* implicit leading one */
t = t & 0x001fffffffffffffLL;
t = t >> (52 - shift);
if (i < 0) {
t = -t;
}
DUK_TVAL_SET_FASTINT(tv, t);
return;
}
} else if (shift == -1023) { /* exponent 0 */
if (i >= 0 && (i & 0x000fffffffffffffLL) == 0) {
/* Note: reject negative zero. */
DUK_TVAL_SET_FASTINT(tv, (duk_int64_t) 0);
return;
}
} else if (shift == 47) { /* exponent 1070 */
if (i < 0 && (i & 0x000fffffffffffffLL) == 0) {
DUK_TVAL_SET_FASTINT(tv, (duk_int64_t) DUK_FASTINT_MIN);
return;
}
}
DUK_TVAL_SET_DOUBLE(tv, x);
return;
}
/*
* Manually optimized number-to-double conversion
*/
#if defined(DUK_USE_FASTINT) && defined(DUK_USE_PACKED_TVAL)
DUK_INTERNAL DUK_ALWAYS_INLINE duk_double_t duk_tval_get_number_packed(duk_tval *tv) {
duk_double_union du;
duk_uint64_t t;
t = (duk_uint64_t) DUK_DBLUNION_GET_UINT64(tv);
if ((t >> 48) != DUK_TAG_FASTINT) {
return tv->d;
} else if (t & 0x0000800000000000ULL) {
t = (duk_uint64_t) (-((duk_int64_t) t)); /* avoid unary minus on unsigned */
t = t & 0x0000ffffffffffffULL; /* negative */
t |= 0xc330000000000000ULL;
DUK_DBLUNION_SET_UINT64(&du, t);
return du.d + 4503599627370496.0; /* 1 << 52 */
} else if (t != 0) {
t &= 0x0000ffffffffffffULL; /* positive */
t |= 0x4330000000000000ULL;
DUK_DBLUNION_SET_UINT64(&du, t);
return du.d - 4503599627370496.0; /* 1 << 52 */
} else {
return 0.0; /* zero */
}
}
#endif /* DUK_USE_FASTINT && DUK_USE_PACKED_TVAL */
#if 0 /* unused */
#if defined(DUK_USE_FASTINT) && !defined(DUK_USE_PACKED_TVAL)
DUK_INTERNAL DUK_ALWAYS_INLINE duk_double_t duk_tval_get_number_unpacked(duk_tval *tv) {
duk_double_union du;
duk_uint64_t t;
DUK_ASSERT(tv->t == DUK__TAG_NUMBER || tv->t == DUK_TAG_FASTINT);
if (tv->t == DUK_TAG_FASTINT) {
if (tv->v.fi >= 0) {
t = 0x4330000000000000ULL | (duk_uint64_t) tv->v.fi;
DUK_DBLUNION_SET_UINT64(&du, t);
return du.d - 4503599627370496.0; /* 1 << 52 */
} else {
t = 0xc330000000000000ULL | (duk_uint64_t) (-tv->v.fi);
DUK_DBLUNION_SET_UINT64(&du, t);
return du.d + 4503599627370496.0; /* 1 << 52 */
}
} else {
return tv->v.d;
}
}
#endif /* DUK_USE_FASTINT && DUK_USE_PACKED_TVAL */
#endif /* 0 */
#if defined(DUK_USE_FASTINT) && !defined(DUK_USE_PACKED_TVAL)
DUK_INTERNAL DUK_ALWAYS_INLINE duk_double_t duk_tval_get_number_unpacked_fastint(duk_tval *tv) {
duk_double_union du;
duk_uint64_t t;
DUK_ASSERT(tv->t == DUK_TAG_FASTINT);
if (tv->v.fi >= 0) {
t = 0x4330000000000000ULL | (duk_uint64_t) tv->v.fi;
DUK_DBLUNION_SET_UINT64(&du, t);
return du.d - 4503599627370496.0; /* 1 << 52 */
} else {
t = 0xc330000000000000ULL | (duk_uint64_t) (-tv->v.fi);
DUK_DBLUNION_SET_UINT64(&du, t);
return du.d + 4503599627370496.0; /* 1 << 52 */
}
}
#endif /* DUK_USE_FASTINT && DUK_USE_PACKED_TVAL */
#endif /* DUK_USE_FASTINT */
#line 1 "duk_unicode_tables.c"
/*
* Unicode support tables automatically generated during build.
*/
/* include removed: duk_internal.h */
/*
* Unicode tables containing ranges of Unicode characters in a
* packed format. These tables are used to match non-ASCII
* characters of complex productions by resorting to a linear
* range-by-range comparison. This is very slow, but is expected
* to be very rare in practical Ecmascript source code, and thus
* compactness is most important.
*
* The tables are matched using uni_range_match() and the format
* is described in src/extract_chars.py.
*/
#ifdef DUK_USE_SOURCE_NONBMP
/* IdentifierStart production with ASCII excluded */
/* duk_unicode_ids_noa[] */
/*
* Automatically generated by extract_chars.py, do not edit!
*/
const duk_uint8_t duk_unicode_ids_noa[791] = {
249,176,176,80,111,7,47,15,47,254,11,197,191,0,72,2,15,115,66,19,57,2,34,2,
240,66,244,50,247,185,248,234,241,99,8,241,127,58,240,182,47,31,241,191,21,
18,245,50,15,1,24,27,35,15,2,2,240,239,15,244,156,15,10,241,26,21,6,240,
101,10,4,15,9,240,159,157,242,100,15,4,8,159,1,98,102,115,19,240,98,98,4,
52,15,2,14,18,47,0,31,5,85,19,240,98,98,18,18,31,17,50,15,5,47,2,130,34,
240,98,98,18,68,15,4,15,1,31,21,115,19,240,98,98,18,68,15,16,18,47,1,15,3,
2,84,34,52,18,2,20,20,36,191,8,15,38,114,34,240,114,146,68,15,12,23,31,21,
114,34,240,114,146,68,15,18,2,31,1,31,4,114,34,241,147,15,2,15,3,31,10,86,
240,36,240,130,130,3,111,44,242,2,29,111,44,18,3,18,3,7,50,98,34,2,3,18,50,
26,3,66,15,7,31,20,15,49,114,241,79,13,79,101,241,191,6,15,2,85,52,4,24,37,
205,15,3,241,107,241,178,4,255,224,59,35,54,32,35,63,25,35,63,17,35,54,32,
35,62,47,41,35,63,51,241,127,0,240,47,69,223,254,21,227,240,18,240,166,243,
180,47,1,194,63,0,240,47,0,240,47,0,194,47,1,242,79,21,5,15,53,244,137,241,
146,6,243,107,240,223,37,240,227,76,241,207,7,111,42,240,122,242,95,68,15,
79,241,255,3,111,41,240,238,31,2,241,111,12,241,79,27,43,241,79,93,50,63,0,
251,15,50,255,224,8,53,63,22,53,55,32,32,32,47,15,63,37,38,32,66,38,67,53,
92,98,38,246,96,224,240,44,245,112,80,57,32,68,112,32,32,35,42,51,100,80,
240,63,25,255,233,107,241,242,241,242,247,87,63,3,241,107,242,106,15,2,240,
122,98,98,98,98,98,98,98,111,66,15,254,12,146,240,184,132,52,95,70,114,47,
74,35,111,25,79,78,240,63,11,242,127,0,255,224,244,255,240,0,138,143,60,
255,240,4,11,239,38,255,227,127,243,95,30,63,253,79,0,177,240,111,31,240,
47,9,159,64,241,152,63,87,51,33,240,9,244,39,34,35,47,7,240,255,36,240,15,
34,243,5,64,240,15,12,191,7,240,191,13,143,31,240,224,242,47,25,240,146,39,
240,111,7,64,111,32,32,65,52,48,32,240,162,241,85,53,53,166,38,248,63,19,
240,255,255,0,26,150,223,7,95,33,255,240,0,255,143,254,2,3,242,227,245,175,
24,109,70,2,146,194,66,2,18,18,245,207,19,255,224,93,240,79,48,63,38,241,
171,246,100,47,119,241,111,10,127,10,207,73,69,53,53,50,241,91,47,10,47,3,
33,46,61,241,79,107,243,127,37,255,223,13,79,33,242,31,15,240,63,11,242,
127,14,63,20,87,36,241,207,142,255,226,86,83,2,241,194,20,3,240,127,156,
240,107,240,175,184,15,1,50,34,240,191,30,240,223,117,242,107,240,107,240,
63,127,243,159,254,42,239,37,243,223,29,255,238,68,255,226,97,248,63,83,
255,234,145,255,227,33,255,240,2,44,95,254,18,191,255,0,52,187,31,255,0,18,
242,244,82,243,114,19,3,19,50,178,2,98,243,18,51,114,98,240,194,50,66,4,98,
255,224,70,63,9,47,9,47,15,47,9,47,15,47,9,47,15,47,9,47,15,47,9,39,255,
240,1,114,143,255,0,149,201,241,191,254,242,124,252,239,255,0,46,214,255,
225,16,0,
};
#else
/* IdentifierStart production with ASCII and non-BMP excluded */
/* duk_unicode_ids_noabmp[] */
/*
* Automatically generated by extract_chars.py, do not edit!
*/
const duk_uint8_t duk_unicode_ids_noabmp[611] = {
249,176,176,80,111,7,47,15,47,254,11,197,191,0,72,2,15,115,66,19,57,2,34,2,
240,66,244,50,247,185,248,234,241,99,8,241,127,58,240,182,47,31,241,191,21,
18,245,50,15,1,24,27,35,15,2,2,240,239,15,244,156,15,10,241,26,21,6,240,
101,10,4,15,9,240,159,157,242,100,15,4,8,159,1,98,102,115,19,240,98,98,4,
52,15,2,14,18,47,0,31,5,85,19,240,98,98,18,18,31,17,50,15,5,47,2,130,34,
240,98,98,18,68,15,4,15,1,31,21,115,19,240,98,98,18,68,15,16,18,47,1,15,3,
2,84,34,52,18,2,20,20,36,191,8,15,38,114,34,240,114,146,68,15,12,23,31,21,
114,34,240,114,146,68,15,18,2,31,1,31,4,114,34,241,147,15,2,15,3,31,10,86,
240,36,240,130,130,3,111,44,242,2,29,111,44,18,3,18,3,7,50,98,34,2,3,18,50,
26,3,66,15,7,31,20,15,49,114,241,79,13,79,101,241,191,6,15,2,85,52,4,24,37,
205,15,3,241,107,241,178,4,255,224,59,35,54,32,35,63,25,35,63,17,35,54,32,
35,62,47,41,35,63,51,241,127,0,240,47,69,223,254,21,227,240,18,240,166,243,
180,47,1,194,63,0,240,47,0,240,47,0,194,47,1,242,79,21,5,15,53,244,137,241,
146,6,243,107,240,223,37,240,227,76,241,207,7,111,42,240,122,242,95,68,15,
79,241,255,3,111,41,240,238,31,2,241,111,12,241,79,27,43,241,79,93,50,63,0,
251,15,50,255,224,8,53,63,22,53,55,32,32,32,47,15,63,37,38,32,66,38,67,53,
92,98,38,246,96,224,240,44,245,112,80,57,32,68,112,32,32,35,42,51,100,80,
240,63,25,255,233,107,241,242,241,242,247,87,63,3,241,107,242,106,15,2,240,
122,98,98,98,98,98,98,98,111,66,15,254,12,146,240,184,132,52,95,70,114,47,
74,35,111,25,79,78,240,63,11,242,127,0,255,224,244,255,240,0,138,143,60,
255,240,4,11,239,38,255,227,127,243,95,30,63,253,79,0,177,240,111,31,240,
47,9,159,64,241,152,63,87,51,33,240,9,244,39,34,35,47,7,240,255,36,240,15,
34,243,5,64,240,15,12,191,7,240,191,13,143,31,240,224,242,47,25,240,146,39,
240,111,7,64,111,32,32,65,52,48,32,240,162,241,85,53,53,166,38,248,63,19,
240,255,255,0,26,150,223,7,95,33,255,240,0,255,143,254,2,3,242,227,245,175,
24,109,70,2,146,194,66,2,18,18,245,207,19,255,224,93,240,79,48,63,38,241,
171,246,100,47,119,241,111,10,127,10,207,73,69,53,53,50,0,
};
#endif
#ifdef DUK_USE_SOURCE_NONBMP
/* IdentifierStart production with Letter and ASCII excluded */
/* duk_unicode_ids_m_let_noa[] */
/*
* Automatically generated by extract_chars.py, do not edit!
*/
const duk_uint8_t duk_unicode_ids_m_let_noa[42] = {
255,240,0,94,18,255,233,99,241,51,63,254,215,32,240,184,240,2,255,240,6,89,
249,255,240,4,148,79,37,255,224,192,9,15,120,79,255,0,15,30,245,48,
};
#else
/* IdentifierStart production with Letter, ASCII, and non-BMP excluded */
/* duk_unicode_ids_m_let_noabmp[] */
/*
* Automatically generated by extract_chars.py, do not edit!
*/
const duk_uint8_t duk_unicode_ids_m_let_noabmp[24] = {
255,240,0,94,18,255,233,99,241,51,63,254,215,32,240,184,240,2,255,240,6,89,
249,0,
};
#endif
#ifdef DUK_USE_SOURCE_NONBMP
/* IdentifierPart production with IdentifierStart and ASCII excluded */
/* duk_unicode_idp_m_ids_noa[] */
/*
* Automatically generated by extract_chars.py, do not edit!
*/
const duk_uint8_t duk_unicode_idp_m_ids_noa[397] = {
255,225,243,246,15,254,0,116,255,191,29,32,33,33,32,243,170,242,47,15,112,
245,118,53,49,35,57,240,144,241,15,11,244,218,240,25,241,56,241,67,40,34,
36,241,210,249,99,242,130,47,2,38,177,57,240,50,242,160,38,49,50,160,177,
57,240,50,242,160,36,81,50,64,240,107,64,194,242,160,39,34,34,240,97,57,
240,50,242,160,38,49,50,145,177,57,240,64,242,212,66,35,160,240,9,240,50,
242,198,34,35,129,193,57,240,65,242,160,38,34,35,129,193,57,240,65,242,198,
34,35,160,177,57,240,65,243,128,85,32,39,240,65,242,240,54,215,41,244,144,
53,33,197,57,243,1,121,192,32,32,81,242,63,4,33,106,47,20,160,245,111,4,41,
211,82,34,54,67,235,46,255,225,179,47,254,42,98,240,242,240,241,241,1,243,
79,14,160,57,241,50,57,248,16,246,139,91,185,245,47,1,129,121,242,244,242,
185,47,13,58,121,245,132,242,31,1,201,240,56,210,241,9,105,241,237,242,47,
4,153,121,246,130,47,5,80,80,251,255,23,240,115,255,225,0,31,35,31,5,15,
109,197,4,191,254,175,34,247,240,245,47,16,255,225,30,95,91,31,255,0,100,
121,159,55,13,31,100,31,254,0,64,64,80,240,148,244,161,242,79,1,201,127,2,
240,9,240,231,240,188,241,227,242,29,240,25,244,29,208,145,57,241,48,242,
96,34,49,97,32,255,224,21,114,19,159,255,0,62,24,15,254,29,95,0,240,38,209,
240,162,251,41,241,112,255,225,177,15,254,25,105,255,228,75,34,22,63,26,37,
15,254,75,66,242,126,241,25,240,34,241,250,255,240,10,249,228,69,151,54,
241,3,248,98,255,228,125,242,47,255,12,23,244,254,0,
};
#else
/* IdentifierPart production with IdentifierStart, ASCII, and non-BMP excluded */
/* duk_unicode_idp_m_ids_noabmp[] */
/*
* Automatically generated by extract_chars.py, do not edit!
*/
const duk_uint8_t duk_unicode_idp_m_ids_noabmp[348] = {
255,225,243,246,15,254,0,116,255,191,29,32,33,33,32,243,170,242,47,15,112,
245,118,53,49,35,57,240,144,241,15,11,244,218,240,25,241,56,241,67,40,34,
36,241,210,249,99,242,130,47,2,38,177,57,240,50,242,160,38,49,50,160,177,
57,240,50,242,160,36,81,50,64,240,107,64,194,242,160,39,34,34,240,97,57,
240,50,242,160,38,49,50,145,177,57,240,64,242,212,66,35,160,240,9,240,50,
242,198,34,35,129,193,57,240,65,242,160,38,34,35,129,193,57,240,65,242,198,
34,35,160,177,57,240,65,243,128,85,32,39,240,65,242,240,54,215,41,244,144,
53,33,197,57,243,1,121,192,32,32,81,242,63,4,33,106,47,20,160,245,111,4,41,
211,82,34,54,67,235,46,255,225,179,47,254,42,98,240,242,240,241,241,1,243,
79,14,160,57,241,50,57,248,16,246,139,91,185,245,47,1,129,121,242,244,242,
185,47,13,58,121,245,132,242,31,1,201,240,56,210,241,9,105,241,237,242,47,
4,153,121,246,130,47,5,80,80,251,255,23,240,115,255,225,0,31,35,31,5,15,
109,197,4,191,254,175,34,247,240,245,47,16,255,225,30,95,91,31,255,0,100,
121,159,55,13,31,100,31,254,0,64,64,80,240,148,244,161,242,79,1,201,127,2,
240,9,240,231,240,188,241,227,242,29,240,25,244,29,208,145,57,241,48,242,
96,34,49,97,32,255,224,21,114,19,159,255,0,62,24,15,254,29,95,0,240,38,209,
240,162,251,41,241,112,0,
};
#endif
/*
* Case conversion tables generated using src/extract_caseconv.py.
*/
/* duk_unicode_caseconv_uc[] */
/* duk_unicode_caseconv_lc[] */
/*
* Automatically generated by extract_caseconv.py, do not edit!
*/
const duk_uint8_t duk_unicode_caseconv_uc[1288] = {
132,3,128,3,0,184,7,192,6,192,112,35,242,199,224,64,74,192,49,32,128,162,
128,108,65,1,189,129,254,131,3,173,3,136,6,7,98,7,34,68,15,12,14,140,72,30,
104,28,112,32,67,0,65,4,0,138,0,128,4,1,88,65,76,83,15,128,15,132,8,31,16,
31,24,12,62,64,62,80,32,124,192,124,224,64,250,0,250,64,97,246,1,246,129,3,
238,3,247,64,135,220,135,242,2,15,187,15,237,2,31,120,31,248,4,62,244,63,
212,8,125,240,127,232,16,253,128,253,192,33,253,1,253,128,67,252,3,253,0,
136,92,8,88,8,18,104,18,91,26,44,48,44,0,94,90,0,33,64,155,253,7,252,132,
212,0,32,32,32,6,0,76,192,76,129,128,157,0,156,136,1,75,1,74,46,2,244,2,
242,12,6,12,6,8,16,13,8,13,0,48,27,64,27,48,64,57,192,57,162,0,119,192,119,
132,128,252,128,252,20,2,35,2,34,18,4,142,4,140,20,13,196,13,192,16,30,200,
30,192,192,70,16,70,2,32,145,96,145,70,193,48,129,48,67,130,104,130,104,44,
30,1,30,0,150,61,66,61,64,192,125,68,125,100,33,99,65,99,56,50,200,18,200,
6,69,157,133,157,96,169,144,105,144,11,211,64,211,64,12,167,35,167,34,15,
78,103,78,100,126,157,234,157,228,21,59,253,59,240,90,122,26,122,0,163,128,
214,128,214,2,1,197,1,196,6,3,140,3,136,12,7,200,7,196,16,20,0,13,48,32,63,
128,63,112,69,142,101,142,64,130,1,136,1,135,4,3,114,3,112,8,26,120,202,
120,176,65,1,30,1,29,130,2,105,1,150,5,255,96,22,160,115,128,31,224,47,0,
38,32,9,32,47,224,10,96,48,0,72,96,50,64,50,32,50,160,62,192,51,32,51,0,51,
64,71,160,51,192,68,0,53,0,52,224,55,224,62,224,59,160,49,192,62,96,62,32,
74,5,141,224,74,37,141,160,74,69,142,0,74,96,48,32,74,128,48,192,75,32,49,
224,75,96,50,0,76,0,50,96,76,96,50,128,76,180,241,160,77,0,50,224,77,101,
140,64,78,37,141,192,78,64,51,160,78,160,51,224,79,165,140,128,81,0,53,192,
81,32,72,128,81,128,72,160,82,64,54,224,104,160,115,32,110,224,110,192,117,
128,112,192,120,64,116,96,121,128,113,128,122,0,114,64,122,32,115,0,122,
160,116,192,122,192,116,0,122,224,121,224,126,0,115,64,126,32,116,32,126,
64,127,32,126,160,114,160,153,224,152,3,175,52,239,163,175,165,140,99,211,
99,204,3,247,192,115,35,252,163,253,132,41,196,38,68,48,132,48,101,140,37,
140,5,140,160,71,69,140,192,71,217,128,55,224,5,48,5,48,20,152,10,240,1,56,
7,194,0,74,3,12,3,144,192,230,64,194,0,192,64,236,48,58,80,48,128,48,16,88,
120,20,212,21,72,122,90,0,72,3,49,30,151,128,21,0,194,7,166,32,5,112,48,
161,233,152,1,100,12,40,122,106,0,65,2,190,31,80,128,233,64,196,199,212,
176,58,80,49,48,48,1,245,76,14,148,12,76,12,4,125,91,3,165,3,19,3,66,31,
128,135,194,0,230,71,224,97,240,144,57,145,248,40,124,40,14,100,126,14,31,
11,3,153,31,132,135,195,0,230,71,225,97,240,208,57,145,248,104,124,56,14,
100,126,30,31,15,3,153,31,136,135,194,0,230,71,226,97,240,144,57,145,248,
168,124,40,14,100,126,46,31,11,3,153,31,140,135,195,0,230,71,227,97,240,
208,57,145,248,232,124,56,14,100,126,62,31,15,3,153,31,144,135,202,0,230,
71,228,97,242,144,57,145,249,40,124,168,14,100,126,78,31,43,3,153,31,148,
135,203,0,230,71,229,97,242,208,57,145,249,104,124,184,14,100,126,94,31,47,
3,153,31,152,135,202,0,230,71,230,97,242,144,57,145,249,168,124,168,14,100,
126,110,31,43,3,153,31,156,135,203,0,230,71,231,97,242,208,57,145,249,232,
124,184,14,100,126,126,31,47,3,153,31,160,135,218,0,230,71,232,97,246,144,
57,145,250,40,125,168,14,100,126,142,31,107,3,153,31,164,135,219,0,230,71,
233,97,246,208,57,145,250,104,125,184,14,100,126,158,31,111,3,153,31,168,
135,218,0,230,71,234,97,246,144,57,145,250,168,125,168,14,100,126,174,31,
107,3,153,31,172,135,219,0,230,71,235,97,246,208,57,145,250,232,125,184,14,
100,126,190,31,111,3,153,31,178,135,238,128,230,71,236,224,57,16,57,145,
251,72,14,24,14,100,126,218,3,145,3,66,31,183,192,228,64,208,128,230,71,
239,32,57,16,57,145,252,40,127,40,14,100,127,14,3,151,3,153,31,196,128,226,
64,230,71,241,160,57,112,52,33,252,124,14,92,13,8,14,100,127,50,3,151,3,
153,31,210,192,230,64,194,0,192,7,244,240,57,144,48,128,48,17,253,104,14,
100,13,8,127,95,3,153,3,8,3,66,31,226,192,233,64,194,0,192,7,248,240,58,80,
48,128,48,17,254,72,14,132,12,76,127,154,3,165,3,66,31,231,192,233,64,194,
0,208,135,252,161,255,160,57,145,255,56,14,164,14,100,127,210,3,143,3,153,
31,246,128,234,64,208,135,253,240,58,144,52,32,57,145,255,200,14,164,14,
103,236,2,0,70,0,70,251,1,128,17,128,18,126,192,160,4,96,4,207,176,60,1,24,
1,24,1,39,236,19,0,70,0,70,0,76,251,5,128,20,192,21,62,193,160,5,48,5,79,
177,56,21,16,21,27,236,82,5,68,5,53,251,21,129,81,1,78,254,197,160,84,224,
84,111,177,120,21,16,20,244,
};
const duk_uint8_t duk_unicode_caseconv_lc[616] = {
144,3,0,3,128,184,6,192,7,192,112,24,144,37,96,64,54,32,81,64,128,226,0,
235,65,129,199,1,230,130,3,145,3,177,34,7,70,7,134,36,15,244,13,236,24,32,
0,34,129,0,65,0,67,4,0,166,32,172,41,132,40,11,64,19,15,132,15,128,8,31,24,
31,16,12,62,80,62,64,32,124,224,124,192,64,250,64,250,0,97,246,129,246,1,3,
241,3,240,2,7,230,7,228,4,15,212,15,208,8,31,184,31,176,4,63,116,62,224,8,
127,32,125,200,32,254,192,254,128,33,253,161,247,96,67,253,3,252,0,135,250,
135,222,129,15,252,15,188,2,31,250,31,124,4,66,192,66,224,64,146,216,147,
64,209,96,1,97,130,242,199,224,35,240,95,228,63,232,38,161,1,0,1,1,48,2,
100,2,102,12,4,228,4,232,64,10,80,10,89,112,23,144,23,160,96,48,64,48,96,
128,104,0,104,65,128,217,128,218,2,1,203,1,204,18,3,188,3,190,36,7,200,7,
204,16,15,192,15,201,64,34,32,34,49,32,72,192,72,225,64,220,0,220,65,1,236,
1,236,140,4,96,4,97,34,9,20,9,22,108,19,4,19,8,56,38,128,38,138,193,224,1,
224,25,99,212,3,212,44,7,214,71,212,66,22,51,150,52,3,44,128,44,129,100,89,
214,89,216,10,153,2,153,4,189,52,5,52,8,202,114,42,114,48,244,230,84,230,
103,233,222,105,222,129,83,191,83,191,133,167,160,167,161,10,48,13,48,20,0,
32,26,192,26,208,64,56,128,56,192,192,113,64,113,129,1,251,129,252,2,44,
114,44,115,4,16,12,56,12,64,32,27,128,27,144,64,211,197,211,198,2,8,6,88,9,
164,16,17,216,17,224,47,245,1,120,0,255,1,129,2,83,1,134,2,84,1,142,1,221,
1,143,2,89,1,144,2,91,1,145,1,146,1,147,2,96,1,148,2,99,1,151,2,104,1,152,
1,153,1,157,2,114,1,159,2,117,1,167,1,168,1,174,2,136,1,183,2,146,1,241,1,
243,1,246,1,149,1,247,1,191,2,32,1,158,2,58,44,101,2,61,1,154,2,62,44,102,
2,67,1,128,2,68,2,137,2,69,2,140,3,118,3,119,3,134,3,172,3,140,3,204,3,207,
3,215,3,244,3,184,3,249,3,242,4,192,4,207,30,158,0,223,31,188,31,179,31,
204,31,195,31,236,31,229,31,252,31,243,33,38,3,201,33,42,0,107,33,43,0,229,
33,50,33,78,33,131,33,132,44,96,44,97,44,98,2,107,44,99,29,125,44,100,2,
125,44,109,2,81,44,110,2,113,44,111,2,80,44,112,2,82,167,125,29,121,167,
141,2,101,2,2,97,0,52,129,131,128,
};
#if defined(DUK_USE_REGEXP_CANON_WORKAROUND)
/*
* Automatically generated by extract_caseconv.py, do not edit!
*/
const duk_uint16_t duk_unicode_re_canon_lookup[65536] = {
0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,
28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,
53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,
78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,65,66,67,68,69,70,
71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,123,124,125,
126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,
144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,
162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,
180,924,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,
198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,
216,217,218,219,220,221,222,223,192,193,194,195,196,197,198,199,200,201,
202,203,204,205,206,207,208,209,210,211,212,213,214,247,216,217,218,219,
220,221,222,376,256,256,258,258,260,260,262,262,264,264,266,266,268,268,
270,270,272,272,274,274,276,276,278,278,280,280,282,282,284,284,286,286,
288,288,290,290,292,292,294,294,296,296,298,298,300,300,302,302,304,305,
306,306,308,308,310,310,312,313,313,315,315,317,317,319,319,321,321,323,
323,325,325,327,327,329,330,330,332,332,334,334,336,336,338,338,340,340,
342,342,344,344,346,346,348,348,350,350,352,352,354,354,356,356,358,358,
360,360,362,362,364,364,366,366,368,368,370,370,372,372,374,374,376,377,
377,379,379,381,381,383,579,385,386,386,388,388,390,391,391,393,394,395,
395,397,398,399,400,401,401,403,404,502,406,407,408,408,573,411,412,413,
544,415,416,416,418,418,420,420,422,423,423,425,426,427,428,428,430,431,
431,433,434,435,435,437,437,439,440,440,442,443,444,444,446,503,448,449,
450,451,452,452,452,455,455,455,458,458,458,461,461,463,463,465,465,467,
467,469,469,471,471,473,473,475,475,398,478,478,480,480,482,482,484,484,
486,486,488,488,490,490,492,492,494,494,496,497,497,497,500,500,502,503,
504,504,506,506,508,508,510,510,512,512,514,514,516,516,518,518,520,520,
522,522,524,524,526,526,528,528,530,530,532,532,534,534,536,536,538,538,
540,540,542,542,544,545,546,546,548,548,550,550,552,552,554,554,556,556,
558,558,560,560,562,562,564,565,566,567,568,569,570,571,571,573,574,11390,
11391,577,577,579,580,581,582,582,584,584,586,586,588,588,590,590,11375,
11373,11376,385,390,597,393,394,600,399,602,400,604,605,606,607,403,609,
610,404,612,42893L,614,615,407,406,618,11362,620,621,622,412,624,11374,413,
627,628,415,630,631,632,633,634,635,636,11364,638,639,422,641,642,425,644,
645,646,647,430,580,433,434,581,653,654,655,656,657,439,659,660,661,662,
663,664,665,666,667,668,669,670,671,672,673,674,675,676,677,678,679,680,
681,682,683,684,685,686,687,688,689,690,691,692,693,694,695,696,697,698,
699,700,701,702,703,704,705,706,707,708,709,710,711,712,713,714,715,716,
717,718,719,720,721,722,723,724,725,726,727,728,729,730,731,732,733,734,
735,736,737,738,739,740,741,742,743,744,745,746,747,748,749,750,751,752,
753,754,755,756,757,758,759,760,761,762,763,764,765,766,767,768,769,770,
771,772,773,774,775,776,777,778,779,780,781,782,783,784,785,786,787,788,
789,790,791,792,793,794,795,796,797,798,799,800,801,802,803,804,805,806,
807,808,809,810,811,812,813,814,815,816,817,818,819,820,821,822,823,824,
825,826,827,828,829,830,831,832,833,834,835,836,921,838,839,840,841,842,
843,844,845,846,847,848,849,850,851,852,853,854,855,856,857,858,859,860,
861,862,863,864,865,866,867,868,869,870,871,872,873,874,875,876,877,878,
879,880,880,882,882,884,885,886,886,888,889,890,1021,1022,1023,894,895,896,
897,898,899,900,901,902,903,904,905,906,907,908,909,910,911,912,913,914,
915,916,917,918,919,920,921,922,923,924,925,926,927,928,929,930,931,932,
933,934,935,936,937,938,939,902,904,905,906,944,913,914,915,916,917,918,
919,920,921,922,923,924,925,926,927,928,929,931,931,932,933,934,935,936,
937,938,939,908,910,911,975,914,920,978,979,980,934,928,975,984,984,986,
986,988,988,990,990,992,992,994,994,996,996,998,998,1000,1000,1002,1002,
1004,1004,1006,1006,922,929,1017,1011,1012,917,1014,1015,1015,1017,1018,
1018,1020,1021,1022,1023,1024,1025,1026,1027,1028,1029,1030,1031,1032,1033,
1034,1035,1036,1037,1038,1039,1040,1041,1042,1043,1044,1045,1046,1047,1048,
1049,1050,1051,1052,1053,1054,1055,1056,1057,1058,1059,1060,1061,1062,1063,
1064,1065,1066,1067,1068,1069,1070,1071,1040,1041,1042,1043,1044,1045,1046,
1047,1048,1049,1050,1051,1052,1053,1054,1055,1056,1057,1058,1059,1060,1061,
1062,1063,1064,1065,1066,1067,1068,1069,1070,1071,1024,1025,1026,1027,1028,
1029,1030,1031,1032,1033,1034,1035,1036,1037,1038,1039,1120,1120,1122,1122,
1124,1124,1126,1126,1128,1128,1130,1130,1132,1132,1134,1134,1136,1136,1138,
1138,1140,1140,1142,1142,1144,1144,1146,1146,1148,1148,1150,1150,1152,1152,
1154,1155,1156,1157,1158,1159,1160,1161,1162,1162,1164,1164,1166,1166,1168,
1168,1170,1170,1172,1172,1174,1174,1176,1176,1178,1178,1180,1180,1182,1182,
1184,1184,1186,1186,1188,1188,1190,1190,1192,1192,1194,1194,1196,1196,1198,
1198,1200,1200,1202,1202,1204,1204,1206,1206,1208,1208,1210,1210,1212,1212,
1214,1214,1216,1217,1217,1219,1219,1221,1221,1223,1223,1225,1225,1227,1227,
1229,1229,1216,1232,1232,1234,1234,1236,1236,1238,1238,1240,1240,1242,1242,
1244,1244,1246,1246,1248,1248,1250,1250,1252,1252,1254,1254,1256,1256,1258,
1258,1260,1260,1262,1262,1264,1264,1266,1266,1268,1268,1270,1270,1272,1272,
1274,1274,1276,1276,1278,1278,1280,1280,1282,1282,1284,1284,1286,1286,1288,
1288,1290,1290,1292,1292,1294,1294,1296,1296,1298,1298,1300,1300,1302,1302,
1304,1304,1306,1306,1308,1308,1310,1310,1312,1312,1314,1314,1316,1316,1318,
1318,1320,1321,1322,1323,1324,1325,1326,1327,1328,1329,1330,1331,1332,1333,
1334,1335,1336,1337,1338,1339,1340,1341,1342,1343,1344,1345,1346,1347,1348,
1349,1350,1351,1352,1353,1354,1355,1356,1357,1358,1359,1360,1361,1362,1363,
1364,1365,1366,1367,1368,1369,1370,1371,1372,1373,1374,1375,1376,1329,1330,
1331,1332,1333,1334,1335,1336,1337,1338,1339,1340,1341,1342,1343,1344,1345,
1346,1347,1348,1349,1350,1351,1352,1353,1354,1355,1356,1357,1358,1359,1360,
1361,1362,1363,1364,1365,1366,1415,1416,1417,1418,1419,1420,1421,1422,1423,
1424,1425,1426,1427,1428,1429,1430,1431,1432,1433,1434,1435,1436,1437,1438,
1439,1440,1441,1442,1443,1444,1445,1446,1447,1448,1449,1450,1451,1452,1453,
1454,1455,1456,1457,1458,1459,1460,1461,1462,1463,1464,1465,1466,1467,1468,
1469,1470,1471,1472,1473,1474,1475,1476,1477,1478,1479,1480,1481,1482,1483,
1484,1485,1486,1487,1488,1489,1490,1491,1492,1493,1494,1495,1496,1497,1498,
1499,1500,1501,1502,1503,1504,1505,1506,1507,1508,1509,1510,1511,1512,1513,
1514,1515,1516,1517,1518,1519,1520,1521,1522,1523,1524,1525,1526,1527,1528,
1529,1530,1531,1532,1533,1534,1535,1536,1537,1538,1539,1540,1541,1542,1543,
1544,1545,1546,1547,1548,1549,1550,1551,1552,1553,1554,1555,1556,1557,1558,
1559,1560,1561,1562,1563,1564,1565,1566,1567,1568,1569,1570,1571,1572,1573,
1574,1575,1576,1577,1578,1579,1580,1581,1582,1583,1584,1585,1586,1587,1588,
1589,1590,1591,1592,1593,1594,1595,1596,1597,1598,1599,1600,1601,1602,1603,
1604,1605,1606,1607,1608,1609,1610,1611,1612,1613,1614,1615,1616,1617,1618,
1619,1620,1621,1622,1623,1624,1625,1626,1627,1628,1629,1630,1631,1632,1633,
1634,1635,1636,1637,1638,1639,1640,1641,1642,1643,1644,1645,1646,1647,1648,
1649,1650,1651,1652,1653,1654,1655,1656,1657,1658,1659,1660,1661,1662,1663,
1664,1665,1666,1667,1668,1669,1670,1671,1672,1673,1674,1675,1676,1677,1678,
1679,1680,1681,1682,1683,1684,1685,1686,1687,1688,1689,1690,1691,1692,1693,
1694,1695,1696,1697,1698,1699,1700,1701,1702,1703,1704,1705,1706,1707,1708,
1709,1710,1711,1712,1713,1714,1715,1716,1717,1718,1719,1720,1721,1722,1723,
1724,1725,1726,1727,1728,1729,1730,1731,1732,1733,1734,1735,1736,1737,1738,
1739,1740,1741,1742,1743,1744,1745,1746,1747,1748,1749,1750,1751,1752,1753,
1754,1755,1756,1757,1758,1759,1760,1761,1762,1763,1764,1765,1766,1767,1768,
1769,1770,1771,1772,1773,1774,1775,1776,1777,1778,1779,1780,1781,1782,1783,
1784,1785,1786,1787,1788,1789,1790,1791,1792,1793,1794,1795,1796,1797,1798,
1799,1800,1801,1802,1803,1804,1805,1806,1807,1808,1809,1810,1811,1812,1813,
1814,1815,1816,1817,1818,1819,1820,1821,1822,1823,1824,1825,1826,1827,1828,
1829,1830,1831,1832,1833,1834,1835,1836,1837,1838,1839,1840,1841,1842,1843,
1844,1845,1846,1847,1848,1849,1850,1851,1852,1853,1854,1855,1856,1857,1858,
1859,1860,1861,1862,1863,1864,1865,1866,1867,1868,1869,1870,1871,1872,1873,
1874,1875,1876,1877,1878,1879,1880,1881,1882,1883,1884,1885,1886,1887,1888,
1889,1890,1891,1892,1893,1894,1895,1896,1897,1898,1899,1900,1901,1902,1903,
1904,1905,1906,1907,1908,1909,1910,1911,1912,1913,1914,1915,1916,1917,1918,
1919,1920,1921,1922,1923,1924,1925,1926,1927,1928,1929,1930,1931,1932,1933,
1934,1935,1936,1937,1938,1939,1940,1941,1942,1943,1944,1945,1946,1947,1948,
1949,1950,1951,1952,1953,1954,1955,1956,1957,1958,1959,1960,1961,1962,1963,
1964,1965,1966,1967,1968,1969,1970,1971,1972,1973,1974,1975,1976,1977,1978,
1979,1980,1981,1982,1983,1984,1985,1986,1987,1988,1989,1990,1991,1992,1993,
1994,1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,
2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022,2023,
2024,2025,2026,2027,2028,2029,2030,2031,2032,2033,2034,2035,2036,2037,2038,
2039,2040,2041,2042,2043,2044,2045,2046,2047,2048,2049,2050,2051,2052,2053,
2054,2055,2056,2057,2058,2059,2060,2061,2062,2063,2064,2065,2066,2067,2068,
2069,2070,2071,2072,2073,2074,2075,2076,2077,2078,2079,2080,2081,2082,2083,
2084,2085,2086,2087,2088,2089,2090,2091,2092,2093,2094,2095,2096,2097,2098,
2099,2100,2101,2102,2103,2104,2105,2106,2107,2108,2109,2110,2111,2112,2113,
2114,2115,2116,2117,2118,2119,2120,2121,2122,2123,2124,2125,2126,2127,2128,
2129,2130,2131,2132,2133,2134,2135,2136,2137,2138,2139,2140,2141,2142,2143,
2144,2145,2146,2147,2148,2149,2150,2151,2152,2153,2154,2155,2156,2157,2158,
2159,2160,2161,2162,2163,2164,2165,2166,2167,2168,2169,2170,2171,2172,2173,
2174,2175,2176,2177,2178,2179,2180,2181,2182,2183,2184,2185,2186,2187,2188,
2189,2190,2191,2192,2193,2194,2195,2196,2197,2198,2199,2200,2201,2202,2203,
2204,2205,2206,2207,2208,2209,2210,2211,2212,2213,2214,2215,2216,2217,2218,
2219,2220,2221,2222,2223,2224,2225,2226,2227,2228,2229,2230,2231,2232,2233,
2234,2235,2236,2237,2238,2239,2240,2241,2242,2243,2244,2245,2246,2247,2248,
2249,2250,2251,2252,2253,2254,2255,2256,2257,2258,2259,2260,2261,2262,2263,
2264,2265,2266,2267,2268,2269,2270,2271,2272,2273,2274,2275,2276,2277,2278,
2279,2280,2281,2282,2283,2284,2285,2286,2287,2288,2289,2290,2291,2292,2293,
2294,2295,2296,2297,2298,2299,2300,2301,2302,2303,2304,2305,2306,2307,2308,
2309,2310,2311,2312,2313,2314,2315,2316,2317,2318,2319,2320,2321,2322,2323,
2324,2325,2326,2327,2328,2329,2330,2331,2332,2333,2334,2335,2336,2337,2338,
2339,2340,2341,2342,2343,2344,2345,2346,2347,2348,2349,2350,2351,2352,2353,
2354,2355,2356,2357,2358,2359,2360,2361,2362,2363,2364,2365,2366,2367,2368,
2369,2370,2371,2372,2373,2374,2375,2376,2377,2378,2379,2380,2381,2382,2383,
2384,2385,2386,2387,2388,2389,2390,2391,2392,2393,2394,2395,2396,2397,2398,
2399,2400,2401,2402,2403,2404,2405,2406,2407,2408,2409,2410,2411,2412,2413,
2414,2415,2416,2417,2418,2419,2420,2421,2422,2423,2424,2425,2426,2427,2428,
2429,2430,2431,2432,2433,2434,2435,2436,2437,2438,2439,2440,2441,2442,2443,
2444,2445,2446,2447,2448,2449,2450,2451,2452,2453,2454,2455,2456,2457,2458,
2459,2460,2461,2462,2463,2464,2465,2466,2467,2468,2469,2470,2471,2472,2473,
2474,2475,2476,2477,2478,2479,2480,2481,2482,2483,2484,2485,2486,2487,2488,
2489,2490,2491,2492,2493,2494,2495,2496,2497,2498,2499,2500,2501,2502,2503,
2504,2505,2506,2507,2508,2509,2510,2511,2512,2513,2514,2515,2516,2517,2518,
2519,2520,2521,2522,2523,2524,2525,2526,2527,2528,2529,2530,2531,2532,2533,
2534,2535,2536,2537,2538,2539,2540,2541,2542,2543,2544,2545,2546,2547,2548,
2549,2550,2551,2552,2553,2554,2555,2556,2557,2558,2559,2560,2561,2562,2563,
2564,2565,2566,2567,2568,2569,2570,2571,2572,2573,2574,2575,2576,2577,2578,
2579,2580,2581,2582,2583,2584,2585,2586,2587,2588,2589,2590,2591,2592,2593,
2594,2595,2596,2597,2598,2599,2600,2601,2602,2603,2604,2605,2606,2607,2608,
2609,2610,2611,2612,2613,2614,2615,2616,2617,2618,2619,2620,2621,2622,2623,
2624,2625,2626,2627,2628,2629,2630,2631,2632,2633,2634,2635,2636,2637,2638,
2639,2640,2641,2642,2643,2644,2645,2646,2647,2648,2649,2650,2651,2652,2653,
2654,2655,2656,2657,2658,2659,2660,2661,2662,2663,2664,2665,2666,2667,2668,
2669,2670,2671,2672,2673,2674,2675,2676,2677,2678,2679,2680,2681,2682,2683,
2684,2685,2686,2687,2688,2689,2690,2691,2692,2693,2694,2695,2696,2697,2698,
2699,2700,2701,2702,2703,2704,2705,2706,2707,2708,2709,2710,2711,2712,2713,
2714,2715,2716,2717,2718,2719,2720,2721,2722,2723,2724,2725,2726,2727,2728,
2729,2730,2731,2732,2733,2734,2735,2736,2737,2738,2739,2740,2741,2742,2743,
2744,2745,2746,2747,2748,2749,2750,2751,2752,2753,2754,2755,2756,2757,2758,
2759,2760,2761,2762,2763,2764,2765,2766,2767,2768,2769,2770,2771,2772,2773,
2774,2775,2776,2777,2778,2779,2780,2781,2782,2783,2784,2785,2786,2787,2788,
2789,2790,2791,2792,2793,2794,2795,2796,2797,2798,2799,2800,2801,2802,2803,
2804,2805,2806,2807,2808,2809,2810,2811,2812,2813,2814,2815,2816,2817,2818,
2819,2820,2821,2822,2823,2824,2825,2826,2827,2828,2829,2830,2831,2832,2833,
2834,2835,2836,2837,2838,2839,2840,2841,2842,2843,2844,2845,2846,2847,2848,
2849,2850,2851,2852,2853,2854,2855,2856,2857,2858,2859,2860,2861,2862,2863,
2864,2865,2866,2867,2868,2869,2870,2871,2872,2873,2874,2875,2876,2877,2878,
2879,2880,2881,2882,2883,2884,2885,2886,2887,2888,2889,2890,2891,2892,2893,
2894,2895,2896,2897,2898,2899,2900,2901,2902,2903,2904,2905,2906,2907,2908,
2909,2910,2911,2912,2913,2914,2915,2916,2917,2918,2919,2920,2921,2922,2923,
2924,2925,2926,2927,2928,2929,2930,2931,2932,2933,2934,2935,2936,2937,2938,
2939,2940,2941,2942,2943,2944,2945,2946,2947,2948,2949,2950,2951,2952,2953,
2954,2955,2956,2957,2958,2959,2960,2961,2962,2963,2964,2965,2966,2967,2968,
2969,2970,2971,2972,2973,2974,2975,2976,2977,2978,2979,2980,2981,2982,2983,
2984,2985,2986,2987,2988,2989,2990,2991,2992,2993,2994,2995,2996,2997,2998,
2999,3000,3001,3002,3003,3004,3005,3006,3007,3008,3009,3010,3011,3012,3013,
3014,3015,3016,3017,3018,3019,3020,3021,3022,3023,3024,3025,3026,3027,3028,
3029,3030,3031,3032,3033,3034,3035,3036,3037,3038,3039,3040,3041,3042,3043,
3044,3045,3046,3047,3048,3049,3050,3051,3052,3053,3054,3055,3056,3057,3058,
3059,3060,3061,3062,3063,3064,3065,3066,3067,3068,3069,3070,3071,3072,3073,
3074,3075,3076,3077,3078,3079,3080,3081,3082,3083,3084,3085,3086,3087,3088,
3089,3090,3091,3092,3093,3094,3095,3096,3097,3098,3099,3100,3101,3102,3103,
3104,3105,3106,3107,3108,3109,3110,3111,3112,3113,3114,3115,3116,3117,3118,
3119,3120,3121,3122,3123,3124,3125,3126,3127,3128,3129,3130,3131,3132,3133,
3134,3135,3136,3137,3138,3139,3140,3141,3142,3143,3144,3145,3146,3147,3148,
3149,3150,3151,3152,3153,3154,3155,3156,3157,3158,3159,3160,3161,3162,3163,
3164,3165,3166,3167,3168,3169,3170,3171,3172,3173,3174,3175,3176,3177,3178,
3179,3180,3181,3182,3183,3184,3185,3186,3187,3188,3189,3190,3191,3192,3193,
3194,3195,3196,3197,3198,3199,3200,3201,3202,3203,3204,3205,3206,3207,3208,
3209,3210,3211,3212,3213,3214,3215,3216,3217,3218,3219,3220,3221,3222,3223,
3224,3225,3226,3227,3228,3229,3230,3231,3232,3233,3234,3235,3236,3237,3238,
3239,3240,3241,3242,3243,3244,3245,3246,3247,3248,3249,3250,3251,3252,3253,
3254,3255,3256,3257,3258,3259,3260,3261,3262,3263,3264,3265,3266,3267,3268,
3269,3270,3271,3272,3273,3274,3275,3276,3277,3278,3279,3280,3281,3282,3283,
3284,3285,3286,3287,3288,3289,3290,3291,3292,3293,3294,3295,3296,3297,3298,
3299,3300,3301,3302,3303,3304,3305,3306,3307,3308,3309,3310,3311,3312,3313,
3314,3315,3316,3317,3318,3319,3320,3321,3322,3323,3324,3325,3326,3327,3328,
3329,3330,3331,3332,3333,3334,3335,3336,3337,3338,3339,3340,3341,3342,3343,
3344,3345,3346,3347,3348,3349,3350,3351,3352,3353,3354,3355,3356,3357,3358,
3359,3360,3361,3362,3363,3364,3365,3366,3367,3368,3369,3370,3371,3372,3373,
3374,3375,3376,3377,3378,3379,3380,3381,3382,3383,3384,3385,3386,3387,3388,
3389,3390,3391,3392,3393,3394,3395,3396,3397,3398,3399,3400,3401,3402,3403,
3404,3405,3406,3407,3408,3409,3410,3411,3412,3413,3414,3415,3416,3417,3418,
3419,3420,3421,3422,3423,3424,3425,3426,3427,3428,3429,3430,3431,3432,3433,
3434,3435,3436,3437,3438,3439,3440,3441,3442,3443,3444,3445,3446,3447,3448,
3449,3450,3451,3452,3453,3454,3455,3456,3457,3458,3459,3460,3461,3462,3463,
3464,3465,3466,3467,3468,3469,3470,3471,3472,3473,3474,3475,3476,3477,3478,
3479,3480,3481,3482,3483,3484,3485,3486,3487,3488,3489,3490,3491,3492,3493,
3494,3495,3496,3497,3498,3499,3500,3501,3502,3503,3504,3505,3506,3507,3508,
3509,3510,3511,3512,3513,3514,3515,3516,3517,3518,3519,3520,3521,3522,3523,
3524,3525,3526,3527,3528,3529,3530,3531,3532,3533,3534,3535,3536,3537,3538,
3539,3540,3541,3542,3543,3544,3545,3546,3547,3548,3549,3550,3551,3552,3553,
3554,3555,3556,3557,3558,3559,3560,3561,3562,3563,3564,3565,3566,3567,3568,
3569,3570,3571,3572,3573,3574,3575,3576,3577,3578,3579,3580,3581,3582,3583,
3584,3585,3586,3587,3588,3589,3590,3591,3592,3593,3594,3595,3596,3597,3598,
3599,3600,3601,3602,3603,3604,3605,3606,3607,3608,3609,3610,3611,3612,3613,
3614,3615,3616,3617,3618,3619,3620,3621,3622,3623,3624,3625,3626,3627,3628,
3629,3630,3631,3632,3633,3634,3635,3636,3637,3638,3639,3640,3641,3642,3643,
3644,3645,3646,3647,3648,3649,3650,3651,3652,3653,3654,3655,3656,3657,3658,
3659,3660,3661,3662,3663,3664,3665,3666,3667,3668,3669,3670,3671,3672,3673,
3674,3675,3676,3677,3678,3679,3680,3681,3682,3683,3684,3685,3686,3687,3688,
3689,3690,3691,3692,3693,3694,3695,3696,3697,3698,3699,3700,3701,3702,3703,
3704,3705,3706,3707,3708,3709,3710,3711,3712,3713,3714,3715,3716,3717,3718,
3719,3720,3721,3722,3723,3724,3725,3726,3727,3728,3729,3730,3731,3732,3733,
3734,3735,3736,3737,3738,3739,3740,3741,3742,3743,3744,3745,3746,3747,3748,
3749,3750,3751,3752,3753,3754,3755,3756,3757,3758,3759,3760,3761,3762,3763,
3764,3765,3766,3767,3768,3769,3770,3771,3772,3773,3774,3775,3776,3777,3778,
3779,3780,3781,3782,3783,3784,3785,3786,3787,3788,3789,3790,3791,3792,3793,
3794,3795,3796,3797,3798,3799,3800,3801,3802,3803,3804,3805,3806,3807,3808,
3809,3810,3811,3812,3813,3814,3815,3816,3817,3818,3819,3820,3821,3822,3823,
3824,3825,3826,3827,3828,3829,3830,3831,3832,3833,3834,3835,3836,3837,3838,
3839,3840,3841,3842,3843,3844,3845,3846,3847,3848,3849,3850,3851,3852,3853,
3854,3855,3856,3857,3858,3859,3860,3861,3862,3863,3864,3865,3866,3867,3868,
3869,3870,3871,3872,3873,3874,3875,3876,3877,3878,3879,3880,3881,3882,3883,
3884,3885,3886,3887,3888,3889,3890,3891,3892,3893,3894,3895,3896,3897,3898,
3899,3900,3901,3902,3903,3904,3905,3906,3907,3908,3909,3910,3911,3912,3913,
3914,3915,3916,3917,3918,3919,3920,3921,3922,3923,3924,3925,3926,3927,3928,
3929,3930,3931,3932,3933,3934,3935,3936,3937,3938,3939,3940,3941,3942,3943,
3944,3945,3946,3947,3948,3949,3950,3951,3952,3953,3954,3955,3956,3957,3958,
3959,3960,3961,3962,3963,3964,3965,3966,3967,3968,3969,3970,3971,3972,3973,
3974,3975,3976,3977,3978,3979,3980,3981,3982,3983,3984,3985,3986,3987,3988,
3989,3990,3991,3992,3993,3994,3995,3996,3997,3998,3999,4000,4001,4002,4003,
4004,4005,4006,4007,4008,4009,4010,4011,4012,4013,4014,4015,4016,4017,4018,
4019,4020,4021,4022,4023,4024,4025,4026,4027,4028,4029,4030,4031,4032,4033,
4034,4035,4036,4037,4038,4039,4040,4041,4042,4043,4044,4045,4046,4047,4048,
4049,4050,4051,4052,4053,4054,4055,4056,4057,4058,4059,4060,4061,4062,4063,
4064,4065,4066,4067,4068,4069,4070,4071,4072,4073,4074,4075,4076,4077,4078,
4079,4080,4081,4082,4083,4084,4085,4086,4087,4088,4089,4090,4091,4092,4093,
4094,4095,4096,4097,4098,4099,4100,4101,4102,4103,4104,4105,4106,4107,4108,
4109,4110,4111,4112,4113,4114,4115,4116,4117,4118,4119,4120,4121,4122,4123,
4124,4125,4126,4127,4128,4129,4130,4131,4132,4133,4134,4135,4136,4137,4138,
4139,4140,4141,4142,4143,4144,4145,4146,4147,4148,4149,4150,4151,4152,4153,
4154,4155,4156,4157,4158,4159,4160,4161,4162,4163,4164,4165,4166,4167,4168,
4169,4170,4171,4172,4173,4174,4175,4176,4177,4178,4179,4180,4181,4182,4183,
4184,4185,4186,4187,4188,4189,4190,4191,4192,4193,4194,4195,4196,4197,4198,
4199,4200,4201,4202,4203,4204,4205,4206,4207,4208,4209,4210,4211,4212,4213,
4214,4215,4216,4217,4218,4219,4220,4221,4222,4223,4224,4225,4226,4227,4228,
4229,4230,4231,4232,4233,4234,4235,4236,4237,4238,4239,4240,4241,4242,4243,
4244,4245,4246,4247,4248,4249,4250,4251,4252,4253,4254,4255,4256,4257,4258,
4259,4260,4261,4262,4263,4264,4265,4266,4267,4268,4269,4270,4271,4272,4273,
4274,4275,4276,4277,4278,4279,4280,4281,4282,4283,4284,4285,4286,4287,4288,
4289,4290,4291,4292,4293,4294,4295,4296,4297,4298,4299,4300,4301,4302,4303,
4304,4305,4306,4307,4308,4309,4310,4311,4312,4313,4314,4315,4316,4317,4318,
4319,4320,4321,4322,4323,4324,4325,4326,4327,4328,4329,4330,4331,4332,4333,
4334,4335,4336,4337,4338,4339,4340,4341,4342,4343,4344,4345,4346,4347,4348,
4349,4350,4351,4352,4353,4354,4355,4356,4357,4358,4359,4360,4361,4362,4363,
4364,4365,4366,4367,4368,4369,4370,4371,4372,4373,4374,4375,4376,4377,4378,
4379,4380,4381,4382,4383,4384,4385,4386,4387,4388,4389,4390,4391,4392,4393,
4394,4395,4396,4397,4398,4399,4400,4401,4402,4403,4404,4405,4406,4407,4408,
4409,4410,4411,4412,4413,4414,4415,4416,4417,4418,4419,4420,4421,4422,4423,
4424,4425,4426,4427,4428,4429,4430,4431,4432,4433,4434,4435,4436,4437,4438,
4439,4440,4441,4442,4443,4444,4445,4446,4447,4448,4449,4450,4451,4452,4453,
4454,4455,4456,4457,4458,4459,4460,4461,4462,4463,4464,4465,4466,4467,4468,
4469,4470,4471,4472,4473,4474,4475,4476,4477,4478,4479,4480,4481,4482,4483,
4484,4485,4486,4487,4488,4489,4490,4491,4492,4493,4494,4495,4496,4497,4498,
4499,4500,4501,4502,4503,4504,4505,4506,4507,4508,4509,4510,4511,4512,4513,
4514,4515,4516,4517,4518,4519,4520,4521,4522,4523,4524,4525,4526,4527,4528,
4529,4530,4531,4532,4533,4534,4535,4536,4537,4538,4539,4540,4541,4542,4543,
4544,4545,4546,4547,4548,4549,4550,4551,4552,4553,4554,4555,4556,4557,4558,
4559,4560,4561,4562,4563,4564,4565,4566,4567,4568,4569,4570,4571,4572,4573,
4574,4575,4576,4577,4578,4579,4580,4581,4582,4583,4584,4585,4586,4587,4588,
4589,4590,4591,4592,4593,4594,4595,4596,4597,4598,4599,4600,4601,4602,4603,
4604,4605,4606,4607,4608,4609,4610,4611,4612,4613,4614,4615,4616,4617,4618,
4619,4620,4621,4622,4623,4624,4625,4626,4627,4628,4629,4630,4631,4632,4633,
4634,4635,4636,4637,4638,4639,4640,4641,4642,4643,4644,4645,4646,4647,4648,
4649,4650,4651,4652,4653,4654,4655,4656,4657,4658,4659,4660,4661,4662,4663,
4664,4665,4666,4667,4668,4669,4670,4671,4672,4673,4674,4675,4676,4677,4678,
4679,4680,4681,4682,4683,4684,4685,4686,4687,4688,4689,4690,4691,4692,4693,
4694,4695,4696,4697,4698,4699,4700,4701,4702,4703,4704,4705,4706,4707,4708,
4709,4710,4711,4712,4713,4714,4715,4716,4717,4718,4719,4720,4721,4722,4723,
4724,4725,4726,4727,4728,4729,4730,4731,4732,4733,4734,4735,4736,4737,4738,
4739,4740,4741,4742,4743,4744,4745,4746,4747,4748,4749,4750,4751,4752,4753,
4754,4755,4756,4757,4758,4759,4760,4761,4762,4763,4764,4765,4766,4767,4768,
4769,4770,4771,4772,4773,4774,4775,4776,4777,4778,4779,4780,4781,4782,4783,
4784,4785,4786,4787,4788,4789,4790,4791,4792,4793,4794,4795,4796,4797,4798,
4799,4800,4801,4802,4803,4804,4805,4806,4807,4808,4809,4810,4811,4812,4813,
4814,4815,4816,4817,4818,4819,4820,4821,4822,4823,4824,4825,4826,4827,4828,
4829,4830,4831,4832,4833,4834,4835,4836,4837,4838,4839,4840,4841,4842,4843,
4844,4845,4846,4847,4848,4849,4850,4851,4852,4853,4854,4855,4856,4857,4858,
4859,4860,4861,4862,4863,4864,4865,4866,4867,4868,4869,4870,4871,4872,4873,
4874,4875,4876,4877,4878,4879,4880,4881,4882,4883,4884,4885,4886,4887,4888,
4889,4890,4891,4892,4893,4894,4895,4896,4897,4898,4899,4900,4901,4902,4903,
4904,4905,4906,4907,4908,4909,4910,4911,4912,4913,4914,4915,4916,4917,4918,
4919,4920,4921,4922,4923,4924,4925,4926,4927,4928,4929,4930,4931,4932,4933,
4934,4935,4936,4937,4938,4939,4940,4941,4942,4943,4944,4945,4946,4947,4948,
4949,4950,4951,4952,4953,4954,4955,4956,4957,4958,4959,4960,4961,4962,4963,
4964,4965,4966,4967,4968,4969,4970,4971,4972,4973,4974,4975,4976,4977,4978,
4979,4980,4981,4982,4983,4984,4985,4986,4987,4988,4989,4990,4991,4992,4993,
4994,4995,4996,4997,4998,4999,5000,5001,5002,5003,5004,5005,5006,5007,5008,
5009,5010,5011,5012,5013,5014,5015,5016,5017,5018,5019,5020,5021,5022,5023,
5024,5025,5026,5027,5028,5029,5030,5031,5032,5033,5034,5035,5036,5037,5038,
5039,5040,5041,5042,5043,5044,5045,5046,5047,5048,5049,5050,5051,5052,5053,
5054,5055,5056,5057,5058,5059,5060,5061,5062,5063,5064,5065,5066,5067,5068,
5069,5070,5071,5072,5073,5074,5075,5076,5077,5078,5079,5080,5081,5082,5083,
5084,5085,5086,5087,5088,5089,5090,5091,5092,5093,5094,5095,5096,5097,5098,
5099,5100,5101,5102,5103,5104,5105,5106,5107,5108,5109,5110,5111,5112,5113,
5114,5115,5116,5117,5118,5119,5120,5121,5122,5123,5124,5125,5126,5127,5128,
5129,5130,5131,5132,5133,5134,5135,5136,5137,5138,5139,5140,5141,5142,5143,
5144,5145,5146,5147,5148,5149,5150,5151,5152,5153,5154,5155,5156,5157,5158,
5159,5160,5161,5162,5163,5164,5165,5166,5167,5168,5169,5170,5171,5172,5173,
5174,5175,5176,5177,5178,5179,5180,5181,5182,5183,5184,5185,5186,5187,5188,
5189,5190,5191,5192,5193,5194,5195,5196,5197,5198,5199,5200,5201,5202,5203,
5204,5205,5206,5207,5208,5209,5210,5211,5212,5213,5214,5215,5216,5217,5218,
5219,5220,5221,5222,5223,5224,5225,5226,5227,5228,5229,5230,5231,5232,5233,
5234,5235,5236,5237,5238,5239,5240,5241,5242,5243,5244,5245,5246,5247,5248,
5249,5250,5251,5252,5253,5254,5255,5256,5257,5258,5259,5260,5261,5262,5263,
5264,5265,5266,5267,5268,5269,5270,5271,5272,5273,5274,5275,5276,5277,5278,
5279,5280,5281,5282,5283,5284,5285,5286,5287,5288,5289,5290,5291,5292,5293,
5294,5295,5296,5297,5298,5299,5300,5301,5302,5303,5304,5305,5306,5307,5308,
5309,5310,5311,5312,5313,5314,5315,5316,5317,5318,5319,5320,5321,5322,5323,
5324,5325,5326,5327,5328,5329,5330,5331,5332,5333,5334,5335,5336,5337,5338,
5339,5340,5341,5342,5343,5344,5345,5346,5347,5348,5349,5350,5351,5352,5353,
5354,5355,5356,5357,5358,5359,5360,5361,5362,5363,5364,5365,5366,5367,5368,
5369,5370,5371,5372,5373,5374,5375,5376,5377,5378,5379,5380,5381,5382,5383,
5384,5385,5386,5387,5388,5389,5390,5391,5392,5393,5394,5395,5396,5397,5398,
5399,5400,5401,5402,5403,5404,5405,5406,5407,5408,5409,5410,5411,5412,5413,
5414,5415,5416,5417,5418,5419,5420,5421,5422,5423,5424,5425,5426,5427,5428,
5429,5430,5431,5432,5433,5434,5435,5436,5437,5438,5439,5440,5441,5442,5443,
5444,5445,5446,5447,5448,5449,5450,5451,5452,5453,5454,5455,5456,5457,5458,
5459,5460,5461,5462,5463,5464,5465,5466,5467,5468,5469,5470,5471,5472,5473,
5474,5475,5476,5477,5478,5479,5480,5481,5482,5483,5484,5485,5486,5487,5488,
5489,5490,5491,5492,5493,5494,5495,5496,5497,5498,5499,5500,5501,5502,5503,
5504,5505,5506,5507,5508,5509,5510,5511,5512,5513,5514,5515,5516,5517,5518,
5519,5520,5521,5522,5523,5524,5525,5526,5527,5528,5529,5530,5531,5532,5533,
5534,5535,5536,5537,5538,5539,5540,5541,5542,5543,5544,5545,5546,5547,5548,
5549,5550,5551,5552,5553,5554,5555,5556,5557,5558,5559,5560,5561,5562,5563,
5564,5565,5566,5567,5568,5569,5570,5571,5572,5573,5574,5575,5576,5577,5578,
5579,5580,5581,5582,5583,5584,5585,5586,5587,5588,5589,5590,5591,5592,5593,
5594,5595,5596,5597,5598,5599,5600,5601,5602,5603,5604,5605,5606,5607,5608,
5609,5610,5611,5612,5613,5614,5615,5616,5617,5618,5619,5620,5621,5622,5623,
5624,5625,5626,5627,5628,5629,5630,5631,5632,5633,5634,5635,5636,5637,5638,
5639,5640,5641,5642,5643,5644,5645,5646,5647,5648,5649,5650,5651,5652,5653,
5654,5655,5656,5657,5658,5659,5660,5661,5662,5663,5664,5665,5666,5667,5668,
5669,5670,5671,5672,5673,5674,5675,5676,5677,5678,5679,5680,5681,5682,5683,
5684,5685,5686,5687,5688,5689,5690,5691,5692,5693,5694,5695,5696,5697,5698,
5699,5700,5701,5702,5703,5704,5705,5706,5707,5708,5709,5710,5711,5712,5713,
5714,5715,5716,5717,5718,5719,5720,5721,5722,5723,5724,5725,5726,5727,5728,
5729,5730,5731,5732,5733,5734,5735,5736,5737,5738,5739,5740,5741,5742,5743,
5744,5745,5746,5747,5748,5749,5750,5751,5752,5753,5754,5755,5756,5757,5758,
5759,5760,5761,5762,5763,5764,5765,5766,5767,5768,5769,5770,5771,5772,5773,
5774,5775,5776,5777,5778,5779,5780,5781,5782,5783,5784,5785,5786,5787,5788,
5789,5790,5791,5792,5793,5794,5795,5796,5797,5798,5799,5800,5801,5802,5803,
5804,5805,5806,5807,5808,5809,5810,5811,5812,5813,5814,5815,5816,5817,5818,
5819,5820,5821,5822,5823,5824,5825,5826,5827,5828,5829,5830,5831,5832,5833,
5834,5835,5836,5837,5838,5839,5840,5841,5842,5843,5844,5845,5846,5847,5848,
5849,5850,5851,5852,5853,5854,5855,5856,5857,5858,5859,5860,5861,5862,5863,
5864,5865,5866,5867,5868,5869,5870,5871,5872,5873,5874,5875,5876,5877,5878,
5879,5880,5881,5882,5883,5884,5885,5886,5887,5888,5889,5890,5891,5892,5893,
5894,5895,5896,5897,5898,5899,5900,5901,5902,5903,5904,5905,5906,5907,5908,
5909,5910,5911,5912,5913,5914,5915,5916,5917,5918,5919,5920,5921,5922,5923,
5924,5925,5926,5927,5928,5929,5930,5931,5932,5933,5934,5935,5936,5937,5938,
5939,5940,5941,5942,5943,5944,5945,5946,5947,5948,5949,5950,5951,5952,5953,
5954,5955,5956,5957,5958,5959,5960,5961,5962,5963,5964,5965,5966,5967,5968,
5969,5970,5971,5972,5973,5974,5975,5976,5977,5978,5979,5980,5981,5982,5983,
5984,5985,5986,5987,5988,5989,5990,5991,5992,5993,5994,5995,5996,5997,5998,
5999,6000,6001,6002,6003,6004,6005,6006,6007,6008,6009,6010,6011,6012,6013,
6014,6015,6016,6017,6018,6019,6020,6021,6022,6023,6024,6025,6026,6027,6028,
6029,6030,6031,6032,6033,6034,6035,6036,6037,6038,6039,6040,6041,6042,6043,
6044,6045,6046,6047,6048,6049,6050,6051,6052,6053,6054,6055,6056,6057,6058,
6059,6060,6061,6062,6063,6064,6065,6066,6067,6068,6069,6070,6071,6072,6073,
6074,6075,6076,6077,6078,6079,6080,6081,6082,6083,6084,6085,6086,6087,6088,
6089,6090,6091,6092,6093,6094,6095,6096,6097,6098,6099,6100,6101,6102,6103,
6104,6105,6106,6107,6108,6109,6110,6111,6112,6113,6114,6115,6116,6117,6118,
6119,6120,6121,6122,6123,6124,6125,6126,6127,6128,6129,6130,6131,6132,6133,
6134,6135,6136,6137,6138,6139,6140,6141,6142,6143,6144,6145,6146,6147,6148,
6149,6150,6151,6152,6153,6154,6155,6156,6157,6158,6159,6160,6161,6162,6163,
6164,6165,6166,6167,6168,6169,6170,6171,6172,6173,6174,6175,6176,6177,6178,
6179,6180,6181,6182,6183,6184,6185,6186,6187,6188,6189,6190,6191,6192,6193,
6194,6195,6196,6197,6198,6199,6200,6201,6202,6203,6204,6205,6206,6207,6208,
6209,6210,6211,6212,6213,6214,6215,6216,6217,6218,6219,6220,6221,6222,6223,
6224,6225,6226,6227,6228,6229,6230,6231,6232,6233,6234,6235,6236,6237,6238,
6239,6240,6241,6242,6243,6244,6245,6246,6247,6248,6249,6250,6251,6252,6253,
6254,6255,6256,6257,6258,6259,6260,6261,6262,6263,6264,6265,6266,6267,6268,
6269,6270,6271,6272,6273,6274,6275,6276,6277,6278,6279,6280,6281,6282,6283,
6284,6285,6286,6287,6288,6289,6290,6291,6292,6293,6294,6295,6296,6297,6298,
6299,6300,6301,6302,6303,6304,6305,6306,6307,6308,6309,6310,6311,6312,6313,
6314,6315,6316,6317,6318,6319,6320,6321,6322,6323,6324,6325,6326,6327,6328,
6329,6330,6331,6332,6333,6334,6335,6336,6337,6338,6339,6340,6341,6342,6343,
6344,6345,6346,6347,6348,6349,6350,6351,6352,6353,6354,6355,6356,6357,6358,
6359,6360,6361,6362,6363,6364,6365,6366,6367,6368,6369,6370,6371,6372,6373,
6374,6375,6376,6377,6378,6379,6380,6381,6382,6383,6384,6385,6386,6387,6388,
6389,6390,6391,6392,6393,6394,6395,6396,6397,6398,6399,6400,6401,6402,6403,
6404,6405,6406,6407,6408,6409,6410,6411,6412,6413,6414,6415,6416,6417,6418,
6419,6420,6421,6422,6423,6424,6425,6426,6427,6428,6429,6430,6431,6432,6433,
6434,6435,6436,6437,6438,6439,6440,6441,6442,6443,6444,6445,6446,6447,6448,
6449,6450,6451,6452,6453,6454,6455,6456,6457,6458,6459,6460,6461,6462,6463,
6464,6465,6466,6467,6468,6469,6470,6471,6472,6473,6474,6475,6476,6477,6478,
6479,6480,6481,6482,6483,6484,6485,6486,6487,6488,6489,6490,6491,6492,6493,
6494,6495,6496,6497,6498,6499,6500,6501,6502,6503,6504,6505,6506,6507,6508,
6509,6510,6511,6512,6513,6514,6515,6516,6517,6518,6519,6520,6521,6522,6523,
6524,6525,6526,6527,6528,6529,6530,6531,6532,6533,6534,6535,6536,6537,6538,
6539,6540,6541,6542,6543,6544,6545,6546,6547,6548,6549,6550,6551,6552,6553,
6554,6555,6556,6557,6558,6559,6560,6561,6562,6563,6564,6565,6566,6567,6568,
6569,6570,6571,6572,6573,6574,6575,6576,6577,6578,6579,6580,6581,6582,6583,
6584,6585,6586,6587,6588,6589,6590,6591,6592,6593,6594,6595,6596,6597,6598,
6599,6600,6601,6602,6603,6604,6605,6606,6607,6608,6609,6610,6611,6612,6613,
6614,6615,6616,6617,6618,6619,6620,6621,6622,6623,6624,6625,6626,6627,6628,
6629,6630,6631,6632,6633,6634,6635,6636,6637,6638,6639,6640,6641,6642,6643,
6644,6645,6646,6647,6648,6649,6650,6651,6652,6653,6654,6655,6656,6657,6658,
6659,6660,6661,6662,6663,6664,6665,6666,6667,6668,6669,6670,6671,6672,6673,
6674,6675,6676,6677,6678,6679,6680,6681,6682,6683,6684,6685,6686,6687,6688,
6689,6690,6691,6692,6693,6694,6695,6696,6697,6698,6699,6700,6701,6702,6703,
6704,6705,6706,6707,6708,6709,6710,6711,6712,6713,6714,6715,6716,6717,6718,
6719,6720,6721,6722,6723,6724,6725,6726,6727,6728,6729,6730,6731,6732,6733,
6734,6735,6736,6737,6738,6739,6740,6741,6742,6743,6744,6745,6746,6747,6748,
6749,6750,6751,6752,6753,6754,6755,6756,6757,6758,6759,6760,6761,6762,6763,
6764,6765,6766,6767,6768,6769,6770,6771,6772,6773,6774,6775,6776,6777,6778,
6779,6780,6781,6782,6783,6784,6785,6786,6787,6788,6789,6790,6791,6792,6793,
6794,6795,6796,6797,6798,6799,6800,6801,6802,6803,6804,6805,6806,6807,6808,
6809,6810,6811,6812,6813,6814,6815,6816,6817,6818,6819,6820,6821,6822,6823,
6824,6825,6826,6827,6828,6829,6830,6831,6832,6833,6834,6835,6836,6837,6838,
6839,6840,6841,6842,6843,6844,6845,6846,6847,6848,6849,6850,6851,6852,6853,
6854,6855,6856,6857,6858,6859,6860,6861,6862,6863,6864,6865,6866,6867,6868,
6869,6870,6871,6872,6873,6874,6875,6876,6877,6878,6879,6880,6881,6882,6883,
6884,6885,6886,6887,6888,6889,6890,6891,6892,6893,6894,6895,6896,6897,6898,
6899,6900,6901,6902,6903,6904,6905,6906,6907,6908,6909,6910,6911,6912,6913,
6914,6915,6916,6917,6918,6919,6920,6921,6922,6923,6924,6925,6926,6927,6928,
6929,6930,6931,6932,6933,6934,6935,6936,6937,6938,6939,6940,6941,6942,6943,
6944,6945,6946,6947,6948,6949,6950,6951,6952,6953,6954,6955,6956,6957,6958,
6959,6960,6961,6962,6963,6964,6965,6966,6967,6968,6969,6970,6971,6972,6973,
6974,6975,6976,6977,6978,6979,6980,6981,6982,6983,6984,6985,6986,6987,6988,
6989,6990,6991,6992,6993,6994,6995,6996,6997,6998,6999,7000,7001,7002,7003,
7004,7005,7006,7007,7008,7009,7010,7011,7012,7013,7014,7015,7016,7017,7018,
7019,7020,7021,7022,7023,7024,7025,7026,7027,7028,7029,7030,7031,7032,7033,
7034,7035,7036,7037,7038,7039,7040,7041,7042,7043,7044,7045,7046,7047,7048,
7049,7050,7051,7052,7053,7054,7055,7056,7057,7058,7059,7060,7061,7062,7063,
7064,7065,7066,7067,7068,7069,7070,7071,7072,7073,7074,7075,7076,7077,7078,
7079,7080,7081,7082,7083,7084,7085,7086,7087,7088,7089,7090,7091,7092,7093,
7094,7095,7096,7097,7098,7099,7100,7101,7102,7103,7104,7105,7106,7107,7108,
7109,7110,7111,7112,7113,7114,7115,7116,7117,7118,7119,7120,7121,7122,7123,
7124,7125,7126,7127,7128,7129,7130,7131,7132,7133,7134,7135,7136,7137,7138,
7139,7140,7141,7142,7143,7144,7145,7146,7147,7148,7149,7150,7151,7152,7153,
7154,7155,7156,7157,7158,7159,7160,7161,7162,7163,7164,7165,7166,7167,7168,
7169,7170,7171,7172,7173,7174,7175,7176,7177,7178,7179,7180,7181,7182,7183,
7184,7185,7186,7187,7188,7189,7190,7191,7192,7193,7194,7195,7196,7197,7198,
7199,7200,7201,7202,7203,7204,7205,7206,7207,7208,7209,7210,7211,7212,7213,
7214,7215,7216,7217,7218,7219,7220,7221,7222,7223,7224,7225,7226,7227,7228,
7229,7230,7231,7232,7233,7234,7235,7236,7237,7238,7239,7240,7241,7242,7243,
7244,7245,7246,7247,7248,7249,7250,7251,7252,7253,7254,7255,7256,7257,7258,
7259,7260,7261,7262,7263,7264,7265,7266,7267,7268,7269,7270,7271,7272,7273,
7274,7275,7276,7277,7278,7279,7280,7281,7282,7283,7284,7285,7286,7287,7288,
7289,7290,7291,7292,7293,7294,7295,7296,7297,7298,7299,7300,7301,7302,7303,
7304,7305,7306,7307,7308,7309,7310,7311,7312,7313,7314,7315,7316,7317,7318,
7319,7320,7321,7322,7323,7324,7325,7326,7327,7328,7329,7330,7331,7332,7333,
7334,7335,7336,7337,7338,7339,7340,7341,7342,7343,7344,7345,7346,7347,7348,
7349,7350,7351,7352,7353,7354,7355,7356,7357,7358,7359,7360,7361,7362,7363,
7364,7365,7366,7367,7368,7369,7370,7371,7372,7373,7374,7375,7376,7377,7378,
7379,7380,7381,7382,7383,7384,7385,7386,7387,7388,7389,7390,7391,7392,7393,
7394,7395,7396,7397,7398,7399,7400,7401,7402,7403,7404,7405,7406,7407,7408,
7409,7410,7411,7412,7413,7414,7415,7416,7417,7418,7419,7420,7421,7422,7423,
7424,7425,7426,7427,7428,7429,7430,7431,7432,7433,7434,7435,7436,7437,7438,
7439,7440,7441,7442,7443,7444,7445,7446,7447,7448,7449,7450,7451,7452,7453,
7454,7455,7456,7457,7458,7459,7460,7461,7462,7463,7464,7465,7466,7467,7468,
7469,7470,7471,7472,7473,7474,7475,7476,7477,7478,7479,7480,7481,7482,7483,
7484,7485,7486,7487,7488,7489,7490,7491,7492,7493,7494,7495,7496,7497,7498,
7499,7500,7501,7502,7503,7504,7505,7506,7507,7508,7509,7510,7511,7512,7513,
7514,7515,7516,7517,7518,7519,7520,7521,7522,7523,7524,7525,7526,7527,7528,
7529,7530,7531,7532,7533,7534,7535,7536,7537,7538,7539,7540,7541,7542,7543,
7544,42877L,7546,7547,7548,11363,7550,7551,7552,7553,7554,7555,7556,7557,
7558,7559,7560,7561,7562,7563,7564,7565,7566,7567,7568,7569,7570,7571,7572,
7573,7574,7575,7576,7577,7578,7579,7580,7581,7582,7583,7584,7585,7586,7587,
7588,7589,7590,7591,7592,7593,7594,7595,7596,7597,7598,7599,7600,7601,7602,
7603,7604,7605,7606,7607,7608,7609,7610,7611,7612,7613,7614,7615,7616,7617,
7618,7619,7620,7621,7622,7623,7624,7625,7626,7627,7628,7629,7630,7631,7632,
7633,7634,7635,7636,7637,7638,7639,7640,7641,7642,7643,7644,7645,7646,7647,
7648,7649,7650,7651,7652,7653,7654,7655,7656,7657,7658,7659,7660,7661,7662,
7663,7664,7665,7666,7667,7668,7669,7670,7671,7672,7673,7674,7675,7676,7677,
7678,7679,7680,7680,7682,7682,7684,7684,7686,7686,7688,7688,7690,7690,7692,
7692,7694,7694,7696,7696,7698,7698,7700,7700,7702,7702,7704,7704,7706,7706,
7708,7708,7710,7710,7712,7712,7714,7714,7716,7716,7718,7718,7720,7720,7722,
7722,7724,7724,7726,7726,7728,7728,7730,7730,7732,7732,7734,7734,7736,7736,
7738,7738,7740,7740,7742,7742,7744,7744,7746,7746,7748,7748,7750,7750,7752,
7752,7754,7754,7756,7756,7758,7758,7760,7760,7762,7762,7764,7764,7766,7766,
7768,7768,7770,7770,7772,7772,7774,7774,7776,7776,7778,7778,7780,7780,7782,
7782,7784,7784,7786,7786,7788,7788,7790,7790,7792,7792,7794,7794,7796,7796,
7798,7798,7800,7800,7802,7802,7804,7804,7806,7806,7808,7808,7810,7810,7812,
7812,7814,7814,7816,7816,7818,7818,7820,7820,7822,7822,7824,7824,7826,7826,
7828,7828,7830,7831,7832,7833,7834,7776,7836,7837,7838,7839,7840,7840,7842,
7842,7844,7844,7846,7846,7848,7848,7850,7850,7852,7852,7854,7854,7856,7856,
7858,7858,7860,7860,7862,7862,7864,7864,7866,7866,7868,7868,7870,7870,7872,
7872,7874,7874,7876,7876,7878,7878,7880,7880,7882,7882,7884,7884,7886,7886,
7888,7888,7890,7890,7892,7892,7894,7894,7896,7896,7898,7898,7900,7900,7902,
7902,7904,7904,7906,7906,7908,7908,7910,7910,7912,7912,7914,7914,7916,7916,
7918,7918,7920,7920,7922,7922,7924,7924,7926,7926,7928,7928,7930,7930,7932,
7932,7934,7934,7944,7945,7946,7947,7948,7949,7950,7951,7944,7945,7946,7947,
7948,7949,7950,7951,7960,7961,7962,7963,7964,7965,7958,7959,7960,7961,7962,
7963,7964,7965,7966,7967,7976,7977,7978,7979,7980,7981,7982,7983,7976,7977,
7978,7979,7980,7981,7982,7983,7992,7993,7994,7995,7996,7997,7998,7999,7992,
7993,7994,7995,7996,7997,7998,7999,8008,8009,8010,8011,8012,8013,8006,8007,
8008,8009,8010,8011,8012,8013,8014,8015,8016,8025,8018,8027,8020,8029,8022,
8031,8024,8025,8026,8027,8028,8029,8030,8031,8040,8041,8042,8043,8044,8045,
8046,8047,8040,8041,8042,8043,8044,8045,8046,8047,8122,8123,8136,8137,8138,
8139,8154,8155,8184,8185,8170,8171,8186,8187,8062,8063,8064,8065,8066,8067,
8068,8069,8070,8071,8072,8073,8074,8075,8076,8077,8078,8079,8080,8081,8082,
8083,8084,8085,8086,8087,8088,8089,8090,8091,8092,8093,8094,8095,8096,8097,
8098,8099,8100,8101,8102,8103,8104,8105,8106,8107,8108,8109,8110,8111,8120,
8121,8114,8115,8116,8117,8118,8119,8120,8121,8122,8123,8124,8125,921,8127,
8128,8129,8130,8131,8132,8133,8134,8135,8136,8137,8138,8139,8140,8141,8142,
8143,8152,8153,8146,8147,8148,8149,8150,8151,8152,8153,8154,8155,8156,8157,
8158,8159,8168,8169,8162,8163,8164,8172,8166,8167,8168,8169,8170,8171,8172,
8173,8174,8175,8176,8177,8178,8179,8180,8181,8182,8183,8184,8185,8186,8187,
8188,8189,8190,8191,8192,8193,8194,8195,8196,8197,8198,8199,8200,8201,8202,
8203,8204,8205,8206,8207,8208,8209,8210,8211,8212,8213,8214,8215,8216,8217,
8218,8219,8220,8221,8222,8223,8224,8225,8226,8227,8228,8229,8230,8231,8232,
8233,8234,8235,8236,8237,8238,8239,8240,8241,8242,8243,8244,8245,8246,8247,
8248,8249,8250,8251,8252,8253,8254,8255,8256,8257,8258,8259,8260,8261,8262,
8263,8264,8265,8266,8267,8268,8269,8270,8271,8272,8273,8274,8275,8276,8277,
8278,8279,8280,8281,8282,8283,8284,8285,8286,8287,8288,8289,8290,8291,8292,
8293,8294,8295,8296,8297,8298,8299,8300,8301,8302,8303,8304,8305,8306,8307,
8308,8309,8310,8311,8312,8313,8314,8315,8316,8317,8318,8319,8320,8321,8322,
8323,8324,8325,8326,8327,8328,8329,8330,8331,8332,8333,8334,8335,8336,8337,
8338,8339,8340,8341,8342,8343,8344,8345,8346,8347,8348,8349,8350,8351,8352,
8353,8354,8355,8356,8357,8358,8359,8360,8361,8362,8363,8364,8365,8366,8367,
8368,8369,8370,8371,8372,8373,8374,8375,8376,8377,8378,8379,8380,8381,8382,
8383,8384,8385,8386,8387,8388,8389,8390,8391,8392,8393,8394,8395,8396,8397,
8398,8399,8400,8401,8402,8403,8404,8405,8406,8407,8408,8409,8410,8411,8412,
8413,8414,8415,8416,8417,8418,8419,8420,8421,8422,8423,8424,8425,8426,8427,
8428,8429,8430,8431,8432,8433,8434,8435,8436,8437,8438,8439,8440,8441,8442,
8443,8444,8445,8446,8447,8448,8449,8450,8451,8452,8453,8454,8455,8456,8457,
8458,8459,8460,8461,8462,8463,8464,8465,8466,8467,8468,8469,8470,8471,8472,
8473,8474,8475,8476,8477,8478,8479,8480,8481,8482,8483,8484,8485,8486,8487,
8488,8489,8490,8491,8492,8493,8494,8495,8496,8497,8498,8499,8500,8501,8502,
8503,8504,8505,8506,8507,8508,8509,8510,8511,8512,8513,8514,8515,8516,8517,
8518,8519,8520,8521,8522,8523,8524,8525,8498,8527,8528,8529,8530,8531,8532,
8533,8534,8535,8536,8537,8538,8539,8540,8541,8542,8543,8544,8545,8546,8547,
8548,8549,8550,8551,8552,8553,8554,8555,8556,8557,8558,8559,8544,8545,8546,
8547,8548,8549,8550,8551,8552,8553,8554,8555,8556,8557,8558,8559,8576,8577,
8578,8579,8579,8581,8582,8583,8584,8585,8586,8587,8588,8589,8590,8591,8592,
8593,8594,8595,8596,8597,8598,8599,8600,8601,8602,8603,8604,8605,8606,8607,
8608,8609,8610,8611,8612,8613,8614,8615,8616,8617,8618,8619,8620,8621,8622,
8623,8624,8625,8626,8627,8628,8629,8630,8631,8632,8633,8634,8635,8636,8637,
8638,8639,8640,8641,8642,8643,8644,8645,8646,8647,8648,8649,8650,8651,8652,
8653,8654,8655,8656,8657,8658,8659,8660,8661,8662,8663,8664,8665,8666,8667,
8668,8669,8670,8671,8672,8673,8674,8675,8676,8677,8678,8679,8680,8681,8682,
8683,8684,8685,8686,8687,8688,8689,8690,8691,8692,8693,8694,8695,8696,8697,
8698,8699,8700,8701,8702,8703,8704,8705,8706,8707,8708,8709,8710,8711,8712,
8713,8714,8715,8716,8717,8718,8719,8720,8721,8722,8723,8724,8725,8726,8727,
8728,8729,8730,8731,8732,8733,8734,8735,8736,8737,8738,8739,8740,8741,8742,
8743,8744,8745,8746,8747,8748,8749,8750,8751,8752,8753,8754,8755,8756,8757,
8758,8759,8760,8761,8762,8763,8764,8765,8766,8767,8768,8769,8770,8771,8772,
8773,8774,8775,8776,8777,8778,8779,8780,8781,8782,8783,8784,8785,8786,8787,
8788,8789,8790,8791,8792,8793,8794,8795,8796,8797,8798,8799,8800,8801,8802,
8803,8804,8805,8806,8807,8808,8809,8810,8811,8812,8813,8814,8815,8816,8817,
8818,8819,8820,8821,8822,8823,8824,8825,8826,8827,8828,8829,8830,8831,8832,
8833,8834,8835,8836,8837,8838,8839,8840,8841,8842,8843,8844,8845,8846,8847,
8848,8849,8850,8851,8852,8853,8854,8855,8856,8857,8858,8859,8860,8861,8862,
8863,8864,8865,8866,8867,8868,8869,8870,8871,8872,8873,8874,8875,8876,8877,
8878,8879,8880,8881,8882,8883,8884,8885,8886,8887,8888,8889,8890,8891,8892,
8893,8894,8895,8896,8897,8898,8899,8900,8901,8902,8903,8904,8905,8906,8907,
8908,8909,8910,8911,8912,8913,8914,8915,8916,8917,8918,8919,8920,8921,8922,
8923,8924,8925,8926,8927,8928,8929,8930,8931,8932,8933,8934,8935,8936,8937,
8938,8939,8940,8941,8942,8943,8944,8945,8946,8947,8948,8949,8950,8951,8952,
8953,8954,8955,8956,8957,8958,8959,8960,8961,8962,8963,8964,8965,8966,8967,
8968,8969,8970,8971,8972,8973,8974,8975,8976,8977,8978,8979,8980,8981,8982,
8983,8984,8985,8986,8987,8988,8989,8990,8991,8992,8993,8994,8995,8996,8997,
8998,8999,9000,9001,9002,9003,9004,9005,9006,9007,9008,9009,9010,9011,9012,
9013,9014,9015,9016,9017,9018,9019,9020,9021,9022,9023,9024,9025,9026,9027,
9028,9029,9030,9031,9032,9033,9034,9035,9036,9037,9038,9039,9040,9041,9042,
9043,9044,9045,9046,9047,9048,9049,9050,9051,9052,9053,9054,9055,9056,9057,
9058,9059,9060,9061,9062,9063,9064,9065,9066,9067,9068,9069,9070,9071,9072,
9073,9074,9075,9076,9077,9078,9079,9080,9081,9082,9083,9084,9085,9086,9087,
9088,9089,9090,9091,9092,9093,9094,9095,9096,9097,9098,9099,9100,9101,9102,
9103,9104,9105,9106,9107,9108,9109,9110,9111,9112,9113,9114,9115,9116,9117,
9118,9119,9120,9121,9122,9123,9124,9125,9126,9127,9128,9129,9130,9131,9132,
9133,9134,9135,9136,9137,9138,9139,9140,9141,9142,9143,9144,9145,9146,9147,
9148,9149,9150,9151,9152,9153,9154,9155,9156,9157,9158,9159,9160,9161,9162,
9163,9164,9165,9166,9167,9168,9169,9170,9171,9172,9173,9174,9175,9176,9177,
9178,9179,9180,9181,9182,9183,9184,9185,9186,9187,9188,9189,9190,9191,9192,
9193,9194,9195,9196,9197,9198,9199,9200,9201,9202,9203,9204,9205,9206,9207,
9208,9209,9210,9211,9212,9213,9214,9215,9216,9217,9218,9219,9220,9221,9222,
9223,9224,9225,9226,9227,9228,9229,9230,9231,9232,9233,9234,9235,9236,9237,
9238,9239,9240,9241,9242,9243,9244,9245,9246,9247,9248,9249,9250,9251,9252,
9253,9254,9255,9256,9257,9258,9259,9260,9261,9262,9263,9264,9265,9266,9267,
9268,9269,9270,9271,9272,9273,9274,9275,9276,9277,9278,9279,9280,9281,9282,
9283,9284,9285,9286,9287,9288,9289,9290,9291,9292,9293,9294,9295,9296,9297,
9298,9299,9300,9301,9302,9303,9304,9305,9306,9307,9308,9309,9310,9311,9312,
9313,9314,9315,9316,9317,9318,9319,9320,9321,9322,9323,9324,9325,9326,9327,
9328,9329,9330,9331,9332,9333,9334,9335,9336,9337,9338,9339,9340,9341,9342,
9343,9344,9345,9346,9347,9348,9349,9350,9351,9352,9353,9354,9355,9356,9357,
9358,9359,9360,9361,9362,9363,9364,9365,9366,9367,9368,9369,9370,9371,9372,
9373,9374,9375,9376,9377,9378,9379,9380,9381,9382,9383,9384,9385,9386,9387,
9388,9389,9390,9391,9392,9393,9394,9395,9396,9397,9398,9399,9400,9401,9402,
9403,9404,9405,9406,9407,9408,9409,9410,9411,9412,9413,9414,9415,9416,9417,
9418,9419,9420,9421,9422,9423,9398,9399,9400,9401,9402,9403,9404,9405,9406,
9407,9408,9409,9410,9411,9412,9413,9414,9415,9416,9417,9418,9419,9420,9421,
9422,9423,9450,9451,9452,9453,9454,9455,9456,9457,9458,9459,9460,9461,9462,
9463,9464,9465,9466,9467,9468,9469,9470,9471,9472,9473,9474,9475,9476,9477,
9478,9479,9480,9481,9482,9483,9484,9485,9486,9487,9488,9489,9490,9491,9492,
9493,9494,9495,9496,9497,9498,9499,9500,9501,9502,9503,9504,9505,9506,9507,
9508,9509,9510,9511,9512,9513,9514,9515,9516,9517,9518,9519,9520,9521,9522,
9523,9524,9525,9526,9527,9528,9529,9530,9531,9532,9533,9534,9535,9536,9537,
9538,9539,9540,9541,9542,9543,9544,9545,9546,9547,9548,9549,9550,9551,9552,
9553,9554,9555,9556,9557,9558,9559,9560,9561,9562,9563,9564,9565,9566,9567,
9568,9569,9570,9571,9572,9573,9574,9575,9576,9577,9578,9579,9580,9581,9582,
9583,9584,9585,9586,9587,9588,9589,9590,9591,9592,9593,9594,9595,9596,9597,
9598,9599,9600,9601,9602,9603,9604,9605,9606,9607,9608,9609,9610,9611,9612,
9613,9614,9615,9616,9617,9618,9619,9620,9621,9622,9623,9624,9625,9626,9627,
9628,9629,9630,9631,9632,9633,9634,9635,9636,9637,9638,9639,9640,9641,9642,
9643,9644,9645,9646,9647,9648,9649,9650,9651,9652,9653,9654,9655,9656,9657,
9658,9659,9660,9661,9662,9663,9664,9665,9666,9667,9668,9669,9670,9671,9672,
9673,9674,9675,9676,9677,9678,9679,9680,9681,9682,9683,9684,9685,9686,9687,
9688,9689,9690,9691,9692,9693,9694,9695,9696,9697,9698,9699,9700,9701,9702,
9703,9704,9705,9706,9707,9708,9709,9710,9711,9712,9713,9714,9715,9716,9717,
9718,9719,9720,9721,9722,9723,9724,9725,9726,9727,9728,9729,9730,9731,9732,
9733,9734,9735,9736,9737,9738,9739,9740,9741,9742,9743,9744,9745,9746,9747,
9748,9749,9750,9751,9752,9753,9754,9755,9756,9757,9758,9759,9760,9761,9762,
9763,9764,9765,9766,9767,9768,9769,9770,9771,9772,9773,9774,9775,9776,9777,
9778,9779,9780,9781,9782,9783,9784,9785,9786,9787,9788,9789,9790,9791,9792,
9793,9794,9795,9796,9797,9798,9799,9800,9801,9802,9803,9804,9805,9806,9807,
9808,9809,9810,9811,9812,9813,9814,9815,9816,9817,9818,9819,9820,9821,9822,
9823,9824,9825,9826,9827,9828,9829,9830,9831,9832,9833,9834,9835,9836,9837,
9838,9839,9840,9841,9842,9843,9844,9845,9846,9847,9848,9849,9850,9851,9852,
9853,9854,9855,9856,9857,9858,9859,9860,9861,9862,9863,9864,9865,9866,9867,
9868,9869,9870,9871,9872,9873,9874,9875,9876,9877,9878,9879,9880,9881,9882,
9883,9884,9885,9886,9887,9888,9889,9890,9891,9892,9893,9894,9895,9896,9897,
9898,9899,9900,9901,9902,9903,9904,9905,9906,9907,9908,9909,9910,9911,9912,
9913,9914,9915,9916,9917,9918,9919,9920,9921,9922,9923,9924,9925,9926,9927,
9928,9929,9930,9931,9932,9933,9934,9935,9936,9937,9938,9939,9940,9941,9942,
9943,9944,9945,9946,9947,9948,9949,9950,9951,9952,9953,9954,9955,9956,9957,
9958,9959,9960,9961,9962,9963,9964,9965,9966,9967,9968,9969,9970,9971,9972,
9973,9974,9975,9976,9977,9978,9979,9980,9981,9982,9983,9984,9985,9986,9987,
9988,9989,9990,9991,9992,9993,9994,9995,9996,9997,9998,9999,10000,10001,
10002,10003,10004,10005,10006,10007,10008,10009,10010,10011,10012,10013,
10014,10015,10016,10017,10018,10019,10020,10021,10022,10023,10024,10025,
10026,10027,10028,10029,10030,10031,10032,10033,10034,10035,10036,10037,
10038,10039,10040,10041,10042,10043,10044,10045,10046,10047,10048,10049,
10050,10051,10052,10053,10054,10055,10056,10057,10058,10059,10060,10061,
10062,10063,10064,10065,10066,10067,10068,10069,10070,10071,10072,10073,
10074,10075,10076,10077,10078,10079,10080,10081,10082,10083,10084,10085,
10086,10087,10088,10089,10090,10091,10092,10093,10094,10095,10096,10097,
10098,10099,10100,10101,10102,10103,10104,10105,10106,10107,10108,10109,
10110,10111,10112,10113,10114,10115,10116,10117,10118,10119,10120,10121,
10122,10123,10124,10125,10126,10127,10128,10129,10130,10131,10132,10133,
10134,10135,10136,10137,10138,10139,10140,10141,10142,10143,10144,10145,
10146,10147,10148,10149,10150,10151,10152,10153,10154,10155,10156,10157,
10158,10159,10160,10161,10162,10163,10164,10165,10166,10167,10168,10169,
10170,10171,10172,10173,10174,10175,10176,10177,10178,10179,10180,10181,
10182,10183,10184,10185,10186,10187,10188,10189,10190,10191,10192,10193,
10194,10195,10196,10197,10198,10199,10200,10201,10202,10203,10204,10205,
10206,10207,10208,10209,10210,10211,10212,10213,10214,10215,10216,10217,
10218,10219,10220,10221,10222,10223,10224,10225,10226,10227,10228,10229,
10230,10231,10232,10233,10234,10235,10236,10237,10238,10239,10240,10241,
10242,10243,10244,10245,10246,10247,10248,10249,10250,10251,10252,10253,
10254,10255,10256,10257,10258,10259,10260,10261,10262,10263,10264,10265,
10266,10267,10268,10269,10270,10271,10272,10273,10274,10275,10276,10277,
10278,10279,10280,10281,10282,10283,10284,10285,10286,10287,10288,10289,
10290,10291,10292,10293,10294,10295,10296,10297,10298,10299,10300,10301,
10302,10303,10304,10305,10306,10307,10308,10309,10310,10311,10312,10313,
10314,10315,10316,10317,10318,10319,10320,10321,10322,10323,10324,10325,
10326,10327,10328,10329,10330,10331,10332,10333,10334,10335,10336,10337,
10338,10339,10340,10341,10342,10343,10344,10345,10346,10347,10348,10349,
10350,10351,10352,10353,10354,10355,10356,10357,10358,10359,10360,10361,
10362,10363,10364,10365,10366,10367,10368,10369,10370,10371,10372,10373,
10374,10375,10376,10377,10378,10379,10380,10381,10382,10383,10384,10385,
10386,10387,10388,10389,10390,10391,10392,10393,10394,10395,10396,10397,
10398,10399,10400,10401,10402,10403,10404,10405,10406,10407,10408,10409,
10410,10411,10412,10413,10414,10415,10416,10417,10418,10419,10420,10421,
10422,10423,10424,10425,10426,10427,10428,10429,10430,10431,10432,10433,
10434,10435,10436,10437,10438,10439,10440,10441,10442,10443,10444,10445,
10446,10447,10448,10449,10450,10451,10452,10453,10454,10455,10456,10457,
10458,10459,10460,10461,10462,10463,10464,10465,10466,10467,10468,10469,
10470,10471,10472,10473,10474,10475,10476,10477,10478,10479,10480,10481,
10482,10483,10484,10485,10486,10487,10488,10489,10490,10491,10492,10493,
10494,10495,10496,10497,10498,10499,10500,10501,10502,10503,10504,10505,
10506,10507,10508,10509,10510,10511,10512,10513,10514,10515,10516,10517,
10518,10519,10520,10521,10522,10523,10524,10525,10526,10527,10528,10529,
10530,10531,10532,10533,10534,10535,10536,10537,10538,10539,10540,10541,
10542,10543,10544,10545,10546,10547,10548,10549,10550,10551,10552,10553,
10554,10555,10556,10557,10558,10559,10560,10561,10562,10563,10564,10565,
10566,10567,10568,10569,10570,10571,10572,10573,10574,10575,10576,10577,
10578,10579,10580,10581,10582,10583,10584,10585,10586,10587,10588,10589,
10590,10591,10592,10593,10594,10595,10596,10597,10598,10599,10600,10601,
10602,10603,10604,10605,10606,10607,10608,10609,10610,10611,10612,10613,
10614,10615,10616,10617,10618,10619,10620,10621,10622,10623,10624,10625,
10626,10627,10628,10629,10630,10631,10632,10633,10634,10635,10636,10637,
10638,10639,10640,10641,10642,10643,10644,10645,10646,10647,10648,10649,
10650,10651,10652,10653,10654,10655,10656,10657,10658,10659,10660,10661,
10662,10663,10664,10665,10666,10667,10668,10669,10670,10671,10672,10673,
10674,10675,10676,10677,10678,10679,10680,10681,10682,10683,10684,10685,
10686,10687,10688,10689,10690,10691,10692,10693,10694,10695,10696,10697,
10698,10699,10700,10701,10702,10703,10704,10705,10706,10707,10708,10709,
10710,10711,10712,10713,10714,10715,10716,10717,10718,10719,10720,10721,
10722,10723,10724,10725,10726,10727,10728,10729,10730,10731,10732,10733,
10734,10735,10736,10737,10738,10739,10740,10741,10742,10743,10744,10745,
10746,10747,10748,10749,10750,10751,10752,10753,10754,10755,10756,10757,
10758,10759,10760,10761,10762,10763,10764,10765,10766,10767,10768,10769,
10770,10771,10772,10773,10774,10775,10776,10777,10778,10779,10780,10781,
10782,10783,10784,10785,10786,10787,10788,10789,10790,10791,10792,10793,
10794,10795,10796,10797,10798,10799,10800,10801,10802,10803,10804,10805,
10806,10807,10808,10809,10810,10811,10812,10813,10814,10815,10816,10817,
10818,10819,10820,10821,10822,10823,10824,10825,10826,10827,10828,10829,
10830,10831,10832,10833,10834,10835,10836,10837,10838,10839,10840,10841,
10842,10843,10844,10845,10846,10847,10848,10849,10850,10851,10852,10853,
10854,10855,10856,10857,10858,10859,10860,10861,10862,10863,10864,10865,
10866,10867,10868,10869,10870,10871,10872,10873,10874,10875,10876,10877,
10878,10879,10880,10881,10882,10883,10884,10885,10886,10887,10888,10889,
10890,10891,10892,10893,10894,10895,10896,10897,10898,10899,10900,10901,
10902,10903,10904,10905,10906,10907,10908,10909,10910,10911,10912,10913,
10914,10915,10916,10917,10918,10919,10920,10921,10922,10923,10924,10925,
10926,10927,10928,10929,10930,10931,10932,10933,10934,10935,10936,10937,
10938,10939,10940,10941,10942,10943,10944,10945,10946,10947,10948,10949,
10950,10951,10952,10953,10954,10955,10956,10957,10958,10959,10960,10961,
10962,10963,10964,10965,10966,10967,10968,10969,10970,10971,10972,10973,
10974,10975,10976,10977,10978,10979,10980,10981,10982,10983,10984,10985,
10986,10987,10988,10989,10990,10991,10992,10993,10994,10995,10996,10997,
10998,10999,11000,11001,11002,11003,11004,11005,11006,11007,11008,11009,
11010,11011,11012,11013,11014,11015,11016,11017,11018,11019,11020,11021,
11022,11023,11024,11025,11026,11027,11028,11029,11030,11031,11032,11033,
11034,11035,11036,11037,11038,11039,11040,11041,11042,11043,11044,11045,
11046,11047,11048,11049,11050,11051,11052,11053,11054,11055,11056,11057,
11058,11059,11060,11061,11062,11063,11064,11065,11066,11067,11068,11069,
11070,11071,11072,11073,11074,11075,11076,11077,11078,11079,11080,11081,
11082,11083,11084,11085,11086,11087,11088,11089,11090,11091,11092,11093,
11094,11095,11096,11097,11098,11099,11100,11101,11102,11103,11104,11105,
11106,11107,11108,11109,11110,11111,11112,11113,11114,11115,11116,11117,
11118,11119,11120,11121,11122,11123,11124,11125,11126,11127,11128,11129,
11130,11131,11132,11133,11134,11135,11136,11137,11138,11139,11140,11141,
11142,11143,11144,11145,11146,11147,11148,11149,11150,11151,11152,11153,
11154,11155,11156,11157,11158,11159,11160,11161,11162,11163,11164,11165,
11166,11167,11168,11169,11170,11171,11172,11173,11174,11175,11176,11177,
11178,11179,11180,11181,11182,11183,11184,11185,11186,11187,11188,11189,
11190,11191,11192,11193,11194,11195,11196,11197,11198,11199,11200,11201,
11202,11203,11204,11205,11206,11207,11208,11209,11210,11211,11212,11213,
11214,11215,11216,11217,11218,11219,11220,11221,11222,11223,11224,11225,
11226,11227,11228,11229,11230,11231,11232,11233,11234,11235,11236,11237,
11238,11239,11240,11241,11242,11243,11244,11245,11246,11247,11248,11249,
11250,11251,11252,11253,11254,11255,11256,11257,11258,11259,11260,11261,
11262,11263,11264,11265,11266,11267,11268,11269,11270,11271,11272,11273,
11274,11275,11276,11277,11278,11279,11280,11281,11282,11283,11284,11285,
11286,11287,11288,11289,11290,11291,11292,11293,11294,11295,11296,11297,
11298,11299,11300,11301,11302,11303,11304,11305,11306,11307,11308,11309,
11310,11311,11264,11265,11266,11267,11268,11269,11270,11271,11272,11273,
11274,11275,11276,11277,11278,11279,11280,11281,11282,11283,11284,11285,
11286,11287,11288,11289,11290,11291,11292,11293,11294,11295,11296,11297,
11298,11299,11300,11301,11302,11303,11304,11305,11306,11307,11308,11309,
11310,11359,11360,11360,11362,11363,11364,570,574,11367,11367,11369,11369,
11371,11371,11373,11374,11375,11376,11377,11378,11378,11380,11381,11381,
11383,11384,11385,11386,11387,11388,11389,11390,11391,11392,11392,11394,
11394,11396,11396,11398,11398,11400,11400,11402,11402,11404,11404,11406,
11406,11408,11408,11410,11410,11412,11412,11414,11414,11416,11416,11418,
11418,11420,11420,11422,11422,11424,11424,11426,11426,11428,11428,11430,
11430,11432,11432,11434,11434,11436,11436,11438,11438,11440,11440,11442,
11442,11444,11444,11446,11446,11448,11448,11450,11450,11452,11452,11454,
11454,11456,11456,11458,11458,11460,11460,11462,11462,11464,11464,11466,
11466,11468,11468,11470,11470,11472,11472,11474,11474,11476,11476,11478,
11478,11480,11480,11482,11482,11484,11484,11486,11486,11488,11488,11490,
11490,11492,11493,11494,11495,11496,11497,11498,11499,11499,11501,11501,
11503,11504,11505,11506,11507,11508,11509,11510,11511,11512,11513,11514,
11515,11516,11517,11518,11519,4256,4257,4258,4259,4260,4261,4262,4263,4264,
4265,4266,4267,4268,4269,4270,4271,4272,4273,4274,4275,4276,4277,4278,4279,
4280,4281,4282,4283,4284,4285,4286,4287,4288,4289,4290,4291,4292,4293,
11558,11559,11560,11561,11562,11563,11564,11565,11566,11567,11568,11569,
11570,11571,11572,11573,11574,11575,11576,11577,11578,11579,11580,11581,
11582,11583,11584,11585,11586,11587,11588,11589,11590,11591,11592,11593,
11594,11595,11596,11597,11598,11599,11600,11601,11602,11603,11604,11605,
11606,11607,11608,11609,11610,11611,11612,11613,11614,11615,11616,11617,
11618,11619,11620,11621,11622,11623,11624,11625,11626,11627,11628,11629,
11630,11631,11632,11633,11634,11635,11636,11637,11638,11639,11640,11641,
11642,11643,11644,11645,11646,11647,11648,11649,11650,11651,11652,11653,
11654,11655,11656,11657,11658,11659,11660,11661,11662,11663,11664,11665,
11666,11667,11668,11669,11670,11671,11672,11673,11674,11675,11676,11677,
11678,11679,11680,11681,11682,11683,11684,11685,11686,11687,11688,11689,
11690,11691,11692,11693,11694,11695,11696,11697,11698,11699,11700,11701,
11702,11703,11704,11705,11706,11707,11708,11709,11710,11711,11712,11713,
11714,11715,11716,11717,11718,11719,11720,11721,11722,11723,11724,11725,
11726,11727,11728,11729,11730,11731,11732,11733,11734,11735,11736,11737,
11738,11739,11740,11741,11742,11743,11744,11745,11746,11747,11748,11749,
11750,11751,11752,11753,11754,11755,11756,11757,11758,11759,11760,11761,
11762,11763,11764,11765,11766,11767,11768,11769,11770,11771,11772,11773,
11774,11775,11776,11777,11778,11779,11780,11781,11782,11783,11784,11785,
11786,11787,11788,11789,11790,11791,11792,11793,11794,11795,11796,11797,
11798,11799,11800,11801,11802,11803,11804,11805,11806,11807,11808,11809,
11810,11811,11812,11813,11814,11815,11816,11817,11818,11819,11820,11821,
11822,11823,11824,11825,11826,11827,11828,11829,11830,11831,11832,11833,
11834,11835,11836,11837,11838,11839,11840,11841,11842,11843,11844,11845,
11846,11847,11848,11849,11850,11851,11852,11853,11854,11855,11856,11857,
11858,11859,11860,11861,11862,11863,11864,11865,11866,11867,11868,11869,
11870,11871,11872,11873,11874,11875,11876,11877,11878,11879,11880,11881,
11882,11883,11884,11885,11886,11887,11888,11889,11890,11891,11892,11893,
11894,11895,11896,11897,11898,11899,11900,11901,11902,11903,11904,11905,
11906,11907,11908,11909,11910,11911,11912,11913,11914,11915,11916,11917,
11918,11919,11920,11921,11922,11923,11924,11925,11926,11927,11928,11929,
11930,11931,11932,11933,11934,11935,11936,11937,11938,11939,11940,11941,
11942,11943,11944,11945,11946,11947,11948,11949,11950,11951,11952,11953,
11954,11955,11956,11957,11958,11959,11960,11961,11962,11963,11964,11965,
11966,11967,11968,11969,11970,11971,11972,11973,11974,11975,11976,11977,
11978,11979,11980,11981,11982,11983,11984,11985,11986,11987,11988,11989,
11990,11991,11992,11993,11994,11995,11996,11997,11998,11999,12000,12001,
12002,12003,12004,12005,12006,12007,12008,12009,12010,12011,12012,12013,
12014,12015,12016,12017,12018,12019,12020,12021,12022,12023,12024,12025,
12026,12027,12028,12029,12030,12031,12032,12033,12034,12035,12036,12037,
12038,12039,12040,12041,12042,12043,12044,12045,12046,12047,12048,12049,
12050,12051,12052,12053,12054,12055,12056,12057,12058,12059,12060,12061,
12062,12063,12064,12065,12066,12067,12068,12069,12070,12071,12072,12073,
12074,12075,12076,12077,12078,12079,12080,12081,12082,12083,12084,12085,
12086,12087,12088,12089,12090,12091,12092,12093,12094,12095,12096,12097,
12098,12099,12100,12101,12102,12103,12104,12105,12106,12107,12108,12109,
12110,12111,12112,12113,12114,12115,12116,12117,12118,12119,12120,12121,
12122,12123,12124,12125,12126,12127,12128,12129,12130,12131,12132,12133,
12134,12135,12136,12137,12138,12139,12140,12141,12142,12143,12144,12145,
12146,12147,12148,12149,12150,12151,12152,12153,12154,12155,12156,12157,
12158,12159,12160,12161,12162,12163,12164,12165,12166,12167,12168,12169,
12170,12171,12172,12173,12174,12175,12176,12177,12178,12179,12180,12181,
12182,12183,12184,12185,12186,12187,12188,12189,12190,12191,12192,12193,
12194,12195,12196,12197,12198,12199,12200,12201,12202,12203,12204,12205,
12206,12207,12208,12209,12210,12211,12212,12213,12214,12215,12216,12217,
12218,12219,12220,12221,12222,12223,12224,12225,12226,12227,12228,12229,
12230,12231,12232,12233,12234,12235,12236,12237,12238,12239,12240,12241,
12242,12243,12244,12245,12246,12247,12248,12249,12250,12251,12252,12253,
12254,12255,12256,12257,12258,12259,12260,12261,12262,12263,12264,12265,
12266,12267,12268,12269,12270,12271,12272,12273,12274,12275,12276,12277,
12278,12279,12280,12281,12282,12283,12284,12285,12286,12287,12288,12289,
12290,12291,12292,12293,12294,12295,12296,12297,12298,12299,12300,12301,
12302,12303,12304,12305,12306,12307,12308,12309,12310,12311,12312,12313,
12314,12315,12316,12317,12318,12319,12320,12321,12322,12323,12324,12325,
12326,12327,12328,12329,12330,12331,12332,12333,12334,12335,12336,12337,
12338,12339,12340,12341,12342,12343,12344,12345,12346,12347,12348,12349,
12350,12351,12352,12353,12354,12355,12356,12357,12358,12359,12360,12361,
12362,12363,12364,12365,12366,12367,12368,12369,12370,12371,12372,12373,
12374,12375,12376,12377,12378,12379,12380,12381,12382,12383,12384,12385,
12386,12387,12388,12389,12390,12391,12392,12393,12394,12395,12396,12397,
12398,12399,12400,12401,12402,12403,12404,12405,12406,12407,12408,12409,
12410,12411,12412,12413,12414,12415,12416,12417,12418,12419,12420,12421,
12422,12423,12424,12425,12426,12427,12428,12429,12430,12431,12432,12433,
12434,12435,12436,12437,12438,12439,12440,12441,12442,12443,12444,12445,
12446,12447,12448,12449,12450,12451,12452,12453,12454,12455,12456,12457,
12458,12459,12460,12461,12462,12463,12464,12465,12466,12467,12468,12469,
12470,12471,12472,12473,12474,12475,12476,12477,12478,12479,12480,12481,
12482,12483,12484,12485,12486,12487,12488,12489,12490,12491,12492,12493,
12494,12495,12496,12497,12498,12499,12500,12501,12502,12503,12504,12505,
12506,12507,12508,12509,12510,12511,12512,12513,12514,12515,12516,12517,
12518,12519,12520,12521,12522,12523,12524,12525,12526,12527,12528,12529,
12530,12531,12532,12533,12534,12535,12536,12537,12538,12539,12540,12541,
12542,12543,12544,12545,12546,12547,12548,12549,12550,12551,12552,12553,
12554,12555,12556,12557,12558,12559,12560,12561,12562,12563,12564,12565,
12566,12567,12568,12569,12570,12571,12572,12573,12574,12575,12576,12577,
12578,12579,12580,12581,12582,12583,12584,12585,12586,12587,12588,12589,
12590,12591,12592,12593,12594,12595,12596,12597,12598,12599,12600,12601,
12602,12603,12604,12605,12606,12607,12608,12609,12610,12611,12612,12613,
12614,12615,12616,12617,12618,12619,12620,12621,12622,12623,12624,12625,
12626,12627,12628,12629,12630,12631,12632,12633,12634,12635,12636,12637,
12638,12639,12640,12641,12642,12643,12644,12645,12646,12647,12648,12649,
12650,12651,12652,12653,12654,12655,12656,12657,12658,12659,12660,12661,
12662,12663,12664,12665,12666,12667,12668,12669,12670,12671,12672,12673,
12674,12675,12676,12677,12678,12679,12680,12681,12682,12683,12684,12685,
12686,12687,12688,12689,12690,12691,12692,12693,12694,12695,12696,12697,
12698,12699,12700,12701,12702,12703,12704,12705,12706,12707,12708,12709,
12710,12711,12712,12713,12714,12715,12716,12717,12718,12719,12720,12721,
12722,12723,12724,12725,12726,12727,12728,12729,12730,12731,12732,12733,
12734,12735,12736,12737,12738,12739,12740,12741,12742,12743,12744,12745,
12746,12747,12748,12749,12750,12751,12752,12753,12754,12755,12756,12757,
12758,12759,12760,12761,12762,12763,12764,12765,12766,12767,12768,12769,
12770,12771,12772,12773,12774,12775,12776,12777,12778,12779,12780,12781,
12782,12783,12784,12785,12786,12787,12788,12789,12790,12791,12792,12793,
12794,12795,12796,12797,12798,12799,12800,12801,12802,12803,12804,12805,
12806,12807,12808,12809,12810,12811,12812,12813,12814,12815,12816,12817,
12818,12819,12820,12821,12822,12823,12824,12825,12826,12827,12828,12829,
12830,12831,12832,12833,12834,12835,12836,12837,12838,12839,12840,12841,
12842,12843,12844,12845,12846,12847,12848,12849,12850,12851,12852,12853,
12854,12855,12856,12857,12858,12859,12860,12861,12862,12863,12864,12865,
12866,12867,12868,12869,12870,12871,12872,12873,12874,12875,12876,12877,
12878,12879,12880,12881,12882,12883,12884,12885,12886,12887,12888,12889,
12890,12891,12892,12893,12894,12895,12896,12897,12898,12899,12900,12901,
12902,12903,12904,12905,12906,12907,12908,12909,12910,12911,12912,12913,
12914,12915,12916,12917,12918,12919,12920,12921,12922,12923,12924,12925,
12926,12927,12928,12929,12930,12931,12932,12933,12934,12935,12936,12937,
12938,12939,12940,12941,12942,12943,12944,12945,12946,12947,12948,12949,
12950,12951,12952,12953,12954,12955,12956,12957,12958,12959,12960,12961,
12962,12963,12964,12965,12966,12967,12968,12969,12970,12971,12972,12973,
12974,12975,12976,12977,12978,12979,12980,12981,12982,12983,12984,12985,
12986,12987,12988,12989,12990,12991,12992,12993,12994,12995,12996,12997,
12998,12999,13000,13001,13002,13003,13004,13005,13006,13007,13008,13009,
13010,13011,13012,13013,13014,13015,13016,13017,13018,13019,13020,13021,
13022,13023,13024,13025,13026,13027,13028,13029,13030,13031,13032,13033,
13034,13035,13036,13037,13038,13039,13040,13041,13042,13043,13044,13045,
13046,13047,13048,13049,13050,13051,13052,13053,13054,13055,13056,13057,
13058,13059,13060,13061,13062,13063,13064,13065,13066,13067,13068,13069,
13070,13071,13072,13073,13074,13075,13076,13077,13078,13079,13080,13081,
13082,13083,13084,13085,13086,13087,13088,13089,13090,13091,13092,13093,
13094,13095,13096,13097,13098,13099,13100,13101,13102,13103,13104,13105,
13106,13107,13108,13109,13110,13111,13112,13113,13114,13115,13116,13117,
13118,13119,13120,13121,13122,13123,13124,13125,13126,13127,13128,13129,
13130,13131,13132,13133,13134,13135,13136,13137,13138,13139,13140,13141,
13142,13143,13144,13145,13146,13147,13148,13149,13150,13151,13152,13153,
13154,13155,13156,13157,13158,13159,13160,13161,13162,13163,13164,13165,
13166,13167,13168,13169,13170,13171,13172,13173,13174,13175,13176,13177,
13178,13179,13180,13181,13182,13183,13184,13185,13186,13187,13188,13189,
13190,13191,13192,13193,13194,13195,13196,13197,13198,13199,13200,13201,
13202,13203,13204,13205,13206,13207,13208,13209,13210,13211,13212,13213,
13214,13215,13216,13217,13218,13219,13220,13221,13222,13223,13224,13225,
13226,13227,13228,13229,13230,13231,13232,13233,13234,13235,13236,13237,
13238,13239,13240,13241,13242,13243,13244,13245,13246,13247,13248,13249,
13250,13251,13252,13253,13254,13255,13256,13257,13258,13259,13260,13261,
13262,13263,13264,13265,13266,13267,13268,13269,13270,13271,13272,13273,
13274,13275,13276,13277,13278,13279,13280,13281,13282,13283,13284,13285,
13286,13287,13288,13289,13290,13291,13292,13293,13294,13295,13296,13297,
13298,13299,13300,13301,13302,13303,13304,13305,13306,13307,13308,13309,
13310,13311,13312,13313,13314,13315,13316,13317,13318,13319,13320,13321,
13322,13323,13324,13325,13326,13327,13328,13329,13330,13331,13332,13333,
13334,13335,13336,13337,13338,13339,13340,13341,13342,13343,13344,13345,
13346,13347,13348,13349,13350,13351,13352,13353,13354,13355,13356,13357,
13358,13359,13360,13361,13362,13363,13364,13365,13366,13367,13368,13369,
13370,13371,13372,13373,13374,13375,13376,13377,13378,13379,13380,13381,
13382,13383,13384,13385,13386,13387,13388,13389,13390,13391,13392,13393,
13394,13395,13396,13397,13398,13399,13400,13401,13402,13403,13404,13405,
13406,13407,13408,13409,13410,13411,13412,13413,13414,13415,13416,13417,
13418,13419,13420,13421,13422,13423,13424,13425,13426,13427,13428,13429,
13430,13431,13432,13433,13434,13435,13436,13437,13438,13439,13440,13441,
13442,13443,13444,13445,13446,13447,13448,13449,13450,13451,13452,13453,
13454,13455,13456,13457,13458,13459,13460,13461,13462,13463,13464,13465,
13466,13467,13468,13469,13470,13471,13472,13473,13474,13475,13476,13477,
13478,13479,13480,13481,13482,13483,13484,13485,13486,13487,13488,13489,
13490,13491,13492,13493,13494,13495,13496,13497,13498,13499,13500,13501,
13502,13503,13504,13505,13506,13507,13508,13509,13510,13511,13512,13513,
13514,13515,13516,13517,13518,13519,13520,13521,13522,13523,13524,13525,
13526,13527,13528,13529,13530,13531,13532,13533,13534,13535,13536,13537,
13538,13539,13540,13541,13542,13543,13544,13545,13546,13547,13548,13549,
13550,13551,13552,13553,13554,13555,13556,13557,13558,13559,13560,13561,
13562,13563,13564,13565,13566,13567,13568,13569,13570,13571,13572,13573,
13574,13575,13576,13577,13578,13579,13580,13581,13582,13583,13584,13585,
13586,13587,13588,13589,13590,13591,13592,13593,13594,13595,13596,13597,
13598,13599,13600,13601,13602,13603,13604,13605,13606,13607,13608,13609,
13610,13611,13612,13613,13614,13615,13616,13617,13618,13619,13620,13621,
13622,13623,13624,13625,13626,13627,13628,13629,13630,13631,13632,13633,
13634,13635,13636,13637,13638,13639,13640,13641,13642,13643,13644,13645,
13646,13647,13648,13649,13650,13651,13652,13653,13654,13655,13656,13657,
13658,13659,13660,13661,13662,13663,13664,13665,13666,13667,13668,13669,
13670,13671,13672,13673,13674,13675,13676,13677,13678,13679,13680,13681,
13682,13683,13684,13685,13686,13687,13688,13689,13690,13691,13692,13693,
13694,13695,13696,13697,13698,13699,13700,13701,13702,13703,13704,13705,
13706,13707,13708,13709,13710,13711,13712,13713,13714,13715,13716,13717,
13718,13719,13720,13721,13722,13723,13724,13725,13726,13727,13728,13729,
13730,13731,13732,13733,13734,13735,13736,13737,13738,13739,13740,13741,
13742,13743,13744,13745,13746,13747,13748,13749,13750,13751,13752,13753,
13754,13755,13756,13757,13758,13759,13760,13761,13762,13763,13764,13765,
13766,13767,13768,13769,13770,13771,13772,13773,13774,13775,13776,13777,
13778,13779,13780,13781,13782,13783,13784,13785,13786,13787,13788,13789,
13790,13791,13792,13793,13794,13795,13796,13797,13798,13799,13800,13801,
13802,13803,13804,13805,13806,13807,13808,13809,13810,13811,13812,13813,
13814,13815,13816,13817,13818,13819,13820,13821,13822,13823,13824,13825,
13826,13827,13828,13829,13830,13831,13832,13833,13834,13835,13836,13837,
13838,13839,13840,13841,13842,13843,13844,13845,13846,13847,13848,13849,
13850,13851,13852,13853,13854,13855,13856,13857,13858,13859,13860,13861,
13862,13863,13864,13865,13866,13867,13868,13869,13870,13871,13872,13873,
13874,13875,13876,13877,13878,13879,13880,13881,13882,13883,13884,13885,
13886,13887,13888,13889,13890,13891,13892,13893,13894,13895,13896,13897,
13898,13899,13900,13901,13902,13903,13904,13905,13906,13907,13908,13909,
13910,13911,13912,13913,13914,13915,13916,13917,13918,13919,13920,13921,
13922,13923,13924,13925,13926,13927,13928,13929,13930,13931,13932,13933,
13934,13935,13936,13937,13938,13939,13940,13941,13942,13943,13944,13945,
13946,13947,13948,13949,13950,13951,13952,13953,13954,13955,13956,13957,
13958,13959,13960,13961,13962,13963,13964,13965,13966,13967,13968,13969,
13970,13971,13972,13973,13974,13975,13976,13977,13978,13979,13980,13981,
13982,13983,13984,13985,13986,13987,13988,13989,13990,13991,13992,13993,
13994,13995,13996,13997,13998,13999,14000,14001,14002,14003,14004,14005,
14006,14007,14008,14009,14010,14011,14012,14013,14014,14015,14016,14017,
14018,14019,14020,14021,14022,14023,14024,14025,14026,14027,14028,14029,
14030,14031,14032,14033,14034,14035,14036,14037,14038,14039,14040,14041,
14042,14043,14044,14045,14046,14047,14048,14049,14050,14051,14052,14053,
14054,14055,14056,14057,14058,14059,14060,14061,14062,14063,14064,14065,
14066,14067,14068,14069,14070,14071,14072,14073,14074,14075,14076,14077,
14078,14079,14080,14081,14082,14083,14084,14085,14086,14087,14088,14089,
14090,14091,14092,14093,14094,14095,14096,14097,14098,14099,14100,14101,
14102,14103,14104,14105,14106,14107,14108,14109,14110,14111,14112,14113,
14114,14115,14116,14117,14118,14119,14120,14121,14122,14123,14124,14125,
14126,14127,14128,14129,14130,14131,14132,14133,14134,14135,14136,14137,
14138,14139,14140,14141,14142,14143,14144,14145,14146,14147,14148,14149,
14150,14151,14152,14153,14154,14155,14156,14157,14158,14159,14160,14161,
14162,14163,14164,14165,14166,14167,14168,14169,14170,14171,14172,14173,
14174,14175,14176,14177,14178,14179,14180,14181,14182,14183,14184,14185,
14186,14187,14188,14189,14190,14191,14192,14193,14194,14195,14196,14197,
14198,14199,14200,14201,14202,14203,14204,14205,14206,14207,14208,14209,
14210,14211,14212,14213,14214,14215,14216,14217,14218,14219,14220,14221,
14222,14223,14224,14225,14226,14227,14228,14229,14230,14231,14232,14233,
14234,14235,14236,14237,14238,14239,14240,14241,14242,14243,14244,14245,
14246,14247,14248,14249,14250,14251,14252,14253,14254,14255,14256,14257,
14258,14259,14260,14261,14262,14263,14264,14265,14266,14267,14268,14269,
14270,14271,14272,14273,14274,14275,14276,14277,14278,14279,14280,14281,
14282,14283,14284,14285,14286,14287,14288,14289,14290,14291,14292,14293,
14294,14295,14296,14297,14298,14299,14300,14301,14302,14303,14304,14305,
14306,14307,14308,14309,14310,14311,14312,14313,14314,14315,14316,14317,
14318,14319,14320,14321,14322,14323,14324,14325,14326,14327,14328,14329,
14330,14331,14332,14333,14334,14335,14336,14337,14338,14339,14340,14341,
14342,14343,14344,14345,14346,14347,14348,14349,14350,14351,14352,14353,
14354,14355,14356,14357,14358,14359,14360,14361,14362,14363,14364,14365,
14366,14367,14368,14369,14370,14371,14372,14373,14374,14375,14376,14377,
14378,14379,14380,14381,14382,14383,14384,14385,14386,14387,14388,14389,
14390,14391,14392,14393,14394,14395,14396,14397,14398,14399,14400,14401,
14402,14403,14404,14405,14406,14407,14408,14409,14410,14411,14412,14413,
14414,14415,14416,14417,14418,14419,14420,14421,14422,14423,14424,14425,
14426,14427,14428,14429,14430,14431,14432,14433,14434,14435,14436,14437,
14438,14439,14440,14441,14442,14443,14444,14445,14446,14447,14448,14449,
14450,14451,14452,14453,14454,14455,14456,14457,14458,14459,14460,14461,
14462,14463,14464,14465,14466,14467,14468,14469,14470,14471,14472,14473,
14474,14475,14476,14477,14478,14479,14480,14481,14482,14483,14484,14485,
14486,14487,14488,14489,14490,14491,14492,14493,14494,14495,14496,14497,
14498,14499,14500,14501,14502,14503,14504,14505,14506,14507,14508,14509,
14510,14511,14512,14513,14514,14515,14516,14517,14518,14519,14520,14521,
14522,14523,14524,14525,14526,14527,14528,14529,14530,14531,14532,14533,
14534,14535,14536,14537,14538,14539,14540,14541,14542,14543,14544,14545,
14546,14547,14548,14549,14550,14551,14552,14553,14554,14555,14556,14557,
14558,14559,14560,14561,14562,14563,14564,14565,14566,14567,14568,14569,
14570,14571,14572,14573,14574,14575,14576,14577,14578,14579,14580,14581,
14582,14583,14584,14585,14586,14587,14588,14589,14590,14591,14592,14593,
14594,14595,14596,14597,14598,14599,14600,14601,14602,14603,14604,14605,
14606,14607,14608,14609,14610,14611,14612,14613,14614,14615,14616,14617,
14618,14619,14620,14621,14622,14623,14624,14625,14626,14627,14628,14629,
14630,14631,14632,14633,14634,14635,14636,14637,14638,14639,14640,14641,
14642,14643,14644,14645,14646,14647,14648,14649,14650,14651,14652,14653,
14654,14655,14656,14657,14658,14659,14660,14661,14662,14663,14664,14665,
14666,14667,14668,14669,14670,14671,14672,14673,14674,14675,14676,14677,
14678,14679,14680,14681,14682,14683,14684,14685,14686,14687,14688,14689,
14690,14691,14692,14693,14694,14695,14696,14697,14698,14699,14700,14701,
14702,14703,14704,14705,14706,14707,14708,14709,14710,14711,14712,14713,
14714,14715,14716,14717,14718,14719,14720,14721,14722,14723,14724,14725,
14726,14727,14728,14729,14730,14731,14732,14733,14734,14735,14736,14737,
14738,14739,14740,14741,14742,14743,14744,14745,14746,14747,14748,14749,
14750,14751,14752,14753,14754,14755,14756,14757,14758,14759,14760,14761,
14762,14763,14764,14765,14766,14767,14768,14769,14770,14771,14772,14773,
14774,14775,14776,14777,14778,14779,14780,14781,14782,14783,14784,14785,
14786,14787,14788,14789,14790,14791,14792,14793,14794,14795,14796,14797,
14798,14799,14800,14801,14802,14803,14804,14805,14806,14807,14808,14809,
14810,14811,14812,14813,14814,14815,14816,14817,14818,14819,14820,14821,
14822,14823,14824,14825,14826,14827,14828,14829,14830,14831,14832,14833,
14834,14835,14836,14837,14838,14839,14840,14841,14842,14843,14844,14845,
14846,14847,14848,14849,14850,14851,14852,14853,14854,14855,14856,14857,
14858,14859,14860,14861,14862,14863,14864,14865,14866,14867,14868,14869,
14870,14871,14872,14873,14874,14875,14876,14877,14878,14879,14880,14881,
14882,14883,14884,14885,14886,14887,14888,14889,14890,14891,14892,14893,
14894,14895,14896,14897,14898,14899,14900,14901,14902,14903,14904,14905,
14906,14907,14908,14909,14910,14911,14912,14913,14914,14915,14916,14917,
14918,14919,14920,14921,14922,14923,14924,14925,14926,14927,14928,14929,
14930,14931,14932,14933,14934,14935,14936,14937,14938,14939,14940,14941,
14942,14943,14944,14945,14946,14947,14948,14949,14950,14951,14952,14953,
14954,14955,14956,14957,14958,14959,14960,14961,14962,14963,14964,14965,
14966,14967,14968,14969,14970,14971,14972,14973,14974,14975,14976,14977,
14978,14979,14980,14981,14982,14983,14984,14985,14986,14987,14988,14989,
14990,14991,14992,14993,14994,14995,14996,14997,14998,14999,15000,15001,
15002,15003,15004,15005,15006,15007,15008,15009,15010,15011,15012,15013,
15014,15015,15016,15017,15018,15019,15020,15021,15022,15023,15024,15025,
15026,15027,15028,15029,15030,15031,15032,15033,15034,15035,15036,15037,
15038,15039,15040,15041,15042,15043,15044,15045,15046,15047,15048,15049,
15050,15051,15052,15053,15054,15055,15056,15057,15058,15059,15060,15061,
15062,15063,15064,15065,15066,15067,15068,15069,15070,15071,15072,15073,
15074,15075,15076,15077,15078,15079,15080,15081,15082,15083,15084,15085,
15086,15087,15088,15089,15090,15091,15092,15093,15094,15095,15096,15097,
15098,15099,15100,15101,15102,15103,15104,15105,15106,15107,15108,15109,
15110,15111,15112,15113,15114,15115,15116,15117,15118,15119,15120,15121,
15122,15123,15124,15125,15126,15127,15128,15129,15130,15131,15132,15133,
15134,15135,15136,15137,15138,15139,15140,15141,15142,15143,15144,15145,
15146,15147,15148,15149,15150,15151,15152,15153,15154,15155,15156,15157,
15158,15159,15160,15161,15162,15163,15164,15165,15166,15167,15168,15169,
15170,15171,15172,15173,15174,15175,15176,15177,15178,15179,15180,15181,
15182,15183,15184,15185,15186,15187,15188,15189,15190,15191,15192,15193,
15194,15195,15196,15197,15198,15199,15200,15201,15202,15203,15204,15205,
15206,15207,15208,15209,15210,15211,15212,15213,15214,15215,15216,15217,
15218,15219,15220,15221,15222,15223,15224,15225,15226,15227,15228,15229,
15230,15231,15232,15233,15234,15235,15236,15237,15238,15239,15240,15241,
15242,15243,15244,15245,15246,15247,15248,15249,15250,15251,15252,15253,
15254,15255,15256,15257,15258,15259,15260,15261,15262,15263,15264,15265,
15266,15267,15268,15269,15270,15271,15272,15273,15274,15275,15276,15277,
15278,15279,15280,15281,15282,15283,15284,15285,15286,15287,15288,15289,
15290,15291,15292,15293,15294,15295,15296,15297,15298,15299,15300,15301,
15302,15303,15304,15305,15306,15307,15308,15309,15310,15311,15312,15313,
15314,15315,15316,15317,15318,15319,15320,15321,15322,15323,15324,15325,
15326,15327,15328,15329,15330,15331,15332,15333,15334,15335,15336,15337,
15338,15339,15340,15341,15342,15343,15344,15345,15346,15347,15348,15349,
15350,15351,15352,15353,15354,15355,15356,15357,15358,15359,15360,15361,
15362,15363,15364,15365,15366,15367,15368,15369,15370,15371,15372,15373,
15374,15375,15376,15377,15378,15379,15380,15381,15382,15383,15384,15385,
15386,15387,15388,15389,15390,15391,15392,15393,15394,15395,15396,15397,
15398,15399,15400,15401,15402,15403,15404,15405,15406,15407,15408,15409,
15410,15411,15412,15413,15414,15415,15416,15417,15418,15419,15420,15421,
15422,15423,15424,15425,15426,15427,15428,15429,15430,15431,15432,15433,
15434,15435,15436,15437,15438,15439,15440,15441,15442,15443,15444,15445,
15446,15447,15448,15449,15450,15451,15452,15453,15454,15455,15456,15457,
15458,15459,15460,15461,15462,15463,15464,15465,15466,15467,15468,15469,
15470,15471,15472,15473,15474,15475,15476,15477,15478,15479,15480,15481,
15482,15483,15484,15485,15486,15487,15488,15489,15490,15491,15492,15493,
15494,15495,15496,15497,15498,15499,15500,15501,15502,15503,15504,15505,
15506,15507,15508,15509,15510,15511,15512,15513,15514,15515,15516,15517,
15518,15519,15520,15521,15522,15523,15524,15525,15526,15527,15528,15529,
15530,15531,15532,15533,15534,15535,15536,15537,15538,15539,15540,15541,
15542,15543,15544,15545,15546,15547,15548,15549,15550,15551,15552,15553,
15554,15555,15556,15557,15558,15559,15560,15561,15562,15563,15564,15565,
15566,15567,15568,15569,15570,15571,15572,15573,15574,15575,15576,15577,
15578,15579,15580,15581,15582,15583,15584,15585,15586,15587,15588,15589,
15590,15591,15592,15593,15594,15595,15596,15597,15598,15599,15600,15601,
15602,15603,15604,15605,15606,15607,15608,15609,15610,15611,15612,15613,
15614,15615,15616,15617,15618,15619,15620,15621,15622,15623,15624,15625,
15626,15627,15628,15629,15630,15631,15632,15633,15634,15635,15636,15637,
15638,15639,15640,15641,15642,15643,15644,15645,15646,15647,15648,15649,
15650,15651,15652,15653,15654,15655,15656,15657,15658,15659,15660,15661,
15662,15663,15664,15665,15666,15667,15668,15669,15670,15671,15672,15673,
15674,15675,15676,15677,15678,15679,15680,15681,15682,15683,15684,15685,
15686,15687,15688,15689,15690,15691,15692,15693,15694,15695,15696,15697,
15698,15699,15700,15701,15702,15703,15704,15705,15706,15707,15708,15709,
15710,15711,15712,15713,15714,15715,15716,15717,15718,15719,15720,15721,
15722,15723,15724,15725,15726,15727,15728,15729,15730,15731,15732,15733,
15734,15735,15736,15737,15738,15739,15740,15741,15742,15743,15744,15745,
15746,15747,15748,15749,15750,15751,15752,15753,15754,15755,15756,15757,
15758,15759,15760,15761,15762,15763,15764,15765,15766,15767,15768,15769,
15770,15771,15772,15773,15774,15775,15776,15777,15778,15779,15780,15781,
15782,15783,15784,15785,15786,15787,15788,15789,15790,15791,15792,15793,
15794,15795,15796,15797,15798,15799,15800,15801,15802,15803,15804,15805,
15806,15807,15808,15809,15810,15811,15812,15813,15814,15815,15816,15817,
15818,15819,15820,15821,15822,15823,15824,15825,15826,15827,15828,15829,
15830,15831,15832,15833,15834,15835,15836,15837,15838,15839,15840,15841,
15842,15843,15844,15845,15846,15847,15848,15849,15850,15851,15852,15853,
15854,15855,15856,15857,15858,15859,15860,15861,15862,15863,15864,15865,
15866,15867,15868,15869,15870,15871,15872,15873,15874,15875,15876,15877,
15878,15879,15880,15881,15882,15883,15884,15885,15886,15887,15888,15889,
15890,15891,15892,15893,15894,15895,15896,15897,15898,15899,15900,15901,
15902,15903,15904,15905,15906,15907,15908,15909,15910,15911,15912,15913,
15914,15915,15916,15917,15918,15919,15920,15921,15922,15923,15924,15925,
15926,15927,15928,15929,15930,15931,15932,15933,15934,15935,15936,15937,
15938,15939,15940,15941,15942,15943,15944,15945,15946,15947,15948,15949,
15950,15951,15952,15953,15954,15955,15956,15957,15958,15959,15960,15961,
15962,15963,15964,15965,15966,15967,15968,15969,15970,15971,15972,15973,
15974,15975,15976,15977,15978,15979,15980,15981,15982,15983,15984,15985,
15986,15987,15988,15989,15990,15991,15992,15993,15994,15995,15996,15997,
15998,15999,16000,16001,16002,16003,16004,16005,16006,16007,16008,16009,
16010,16011,16012,16013,16014,16015,16016,16017,16018,16019,16020,16021,
16022,16023,16024,16025,16026,16027,16028,16029,16030,16031,16032,16033,
16034,16035,16036,16037,16038,16039,16040,16041,16042,16043,16044,16045,
16046,16047,16048,16049,16050,16051,16052,16053,16054,16055,16056,16057,
16058,16059,16060,16061,16062,16063,16064,16065,16066,16067,16068,16069,
16070,16071,16072,16073,16074,16075,16076,16077,16078,16079,16080,16081,
16082,16083,16084,16085,16086,16087,16088,16089,16090,16091,16092,16093,
16094,16095,16096,16097,16098,16099,16100,16101,16102,16103,16104,16105,
16106,16107,16108,16109,16110,16111,16112,16113,16114,16115,16116,16117,
16118,16119,16120,16121,16122,16123,16124,16125,16126,16127,16128,16129,
16130,16131,16132,16133,16134,16135,16136,16137,16138,16139,16140,16141,
16142,16143,16144,16145,16146,16147,16148,16149,16150,16151,16152,16153,
16154,16155,16156,16157,16158,16159,16160,16161,16162,16163,16164,16165,
16166,16167,16168,16169,16170,16171,16172,16173,16174,16175,16176,16177,
16178,16179,16180,16181,16182,16183,16184,16185,16186,16187,16188,16189,
16190,16191,16192,16193,16194,16195,16196,16197,16198,16199,16200,16201,
16202,16203,16204,16205,16206,16207,16208,16209,16210,16211,16212,16213,
16214,16215,16216,16217,16218,16219,16220,16221,16222,16223,16224,16225,
16226,16227,16228,16229,16230,16231,16232,16233,16234,16235,16236,16237,
16238,16239,16240,16241,16242,16243,16244,16245,16246,16247,16248,16249,
16250,16251,16252,16253,16254,16255,16256,16257,16258,16259,16260,16261,
16262,16263,16264,16265,16266,16267,16268,16269,16270,16271,16272,16273,
16274,16275,16276,16277,16278,16279,16280,16281,16282,16283,16284,16285,
16286,16287,16288,16289,16290,16291,16292,16293,16294,16295,16296,16297,
16298,16299,16300,16301,16302,16303,16304,16305,16306,16307,16308,16309,
16310,16311,16312,16313,16314,16315,16316,16317,16318,16319,16320,16321,
16322,16323,16324,16325,16326,16327,16328,16329,16330,16331,16332,16333,
16334,16335,16336,16337,16338,16339,16340,16341,16342,16343,16344,16345,
16346,16347,16348,16349,16350,16351,16352,16353,16354,16355,16356,16357,
16358,16359,16360,16361,16362,16363,16364,16365,16366,16367,16368,16369,
16370,16371,16372,16373,16374,16375,16376,16377,16378,16379,16380,16381,
16382,16383,16384,16385,16386,16387,16388,16389,16390,16391,16392,16393,
16394,16395,16396,16397,16398,16399,16400,16401,16402,16403,16404,16405,
16406,16407,16408,16409,16410,16411,16412,16413,16414,16415,16416,16417,
16418,16419,16420,16421,16422,16423,16424,16425,16426,16427,16428,16429,
16430,16431,16432,16433,16434,16435,16436,16437,16438,16439,16440,16441,
16442,16443,16444,16445,16446,16447,16448,16449,16450,16451,16452,16453,
16454,16455,16456,16457,16458,16459,16460,16461,16462,16463,16464,16465,
16466,16467,16468,16469,16470,16471,16472,16473,16474,16475,16476,16477,
16478,16479,16480,16481,16482,16483,16484,16485,16486,16487,16488,16489,
16490,16491,16492,16493,16494,16495,16496,16497,16498,16499,16500,16501,
16502,16503,16504,16505,16506,16507,16508,16509,16510,16511,16512,16513,
16514,16515,16516,16517,16518,16519,16520,16521,16522,16523,16524,16525,
16526,16527,16528,16529,16530,16531,16532,16533,16534,16535,16536,16537,
16538,16539,16540,16541,16542,16543,16544,16545,16546,16547,16548,16549,
16550,16551,16552,16553,16554,16555,16556,16557,16558,16559,16560,16561,
16562,16563,16564,16565,16566,16567,16568,16569,16570,16571,16572,16573,
16574,16575,16576,16577,16578,16579,16580,16581,16582,16583,16584,16585,
16586,16587,16588,16589,16590,16591,16592,16593,16594,16595,16596,16597,
16598,16599,16600,16601,16602,16603,16604,16605,16606,16607,16608,16609,
16610,16611,16612,16613,16614,16615,16616,16617,16618,16619,16620,16621,
16622,16623,16624,16625,16626,16627,16628,16629,16630,16631,16632,16633,
16634,16635,16636,16637,16638,16639,16640,16641,16642,16643,16644,16645,
16646,16647,16648,16649,16650,16651,16652,16653,16654,16655,16656,16657,
16658,16659,16660,16661,16662,16663,16664,16665,16666,16667,16668,16669,
16670,16671,16672,16673,16674,16675,16676,16677,16678,16679,16680,16681,
16682,16683,16684,16685,16686,16687,16688,16689,16690,16691,16692,16693,
16694,16695,16696,16697,16698,16699,16700,16701,16702,16703,16704,16705,
16706,16707,16708,16709,16710,16711,16712,16713,16714,16715,16716,16717,
16718,16719,16720,16721,16722,16723,16724,16725,16726,16727,16728,16729,
16730,16731,16732,16733,16734,16735,16736,16737,16738,16739,16740,16741,
16742,16743,16744,16745,16746,16747,16748,16749,16750,16751,16752,16753,
16754,16755,16756,16757,16758,16759,16760,16761,16762,16763,16764,16765,
16766,16767,16768,16769,16770,16771,16772,16773,16774,16775,16776,16777,
16778,16779,16780,16781,16782,16783,16784,16785,16786,16787,16788,16789,
16790,16791,16792,16793,16794,16795,16796,16797,16798,16799,16800,16801,
16802,16803,16804,16805,16806,16807,16808,16809,16810,16811,16812,16813,
16814,16815,16816,16817,16818,16819,16820,16821,16822,16823,16824,16825,
16826,16827,16828,16829,16830,16831,16832,16833,16834,16835,16836,16837,
16838,16839,16840,16841,16842,16843,16844,16845,16846,16847,16848,16849,
16850,16851,16852,16853,16854,16855,16856,16857,16858,16859,16860,16861,
16862,16863,16864,16865,16866,16867,16868,16869,16870,16871,16872,16873,
16874,16875,16876,16877,16878,16879,16880,16881,16882,16883,16884,16885,
16886,16887,16888,16889,16890,16891,16892,16893,16894,16895,16896,16897,
16898,16899,16900,16901,16902,16903,16904,16905,16906,16907,16908,16909,
16910,16911,16912,16913,16914,16915,16916,16917,16918,16919,16920,16921,
16922,16923,16924,16925,16926,16927,16928,16929,16930,16931,16932,16933,
16934,16935,16936,16937,16938,16939,16940,16941,16942,16943,16944,16945,
16946,16947,16948,16949,16950,16951,16952,16953,16954,16955,16956,16957,
16958,16959,16960,16961,16962,16963,16964,16965,16966,16967,16968,16969,
16970,16971,16972,16973,16974,16975,16976,16977,16978,16979,16980,16981,
16982,16983,16984,16985,16986,16987,16988,16989,16990,16991,16992,16993,
16994,16995,16996,16997,16998,16999,17000,17001,17002,17003,17004,17005,
17006,17007,17008,17009,17010,17011,17012,17013,17014,17015,17016,17017,
17018,17019,17020,17021,17022,17023,17024,17025,17026,17027,17028,17029,
17030,17031,17032,17033,17034,17035,17036,17037,17038,17039,17040,17041,
17042,17043,17044,17045,17046,17047,17048,17049,17050,17051,17052,17053,
17054,17055,17056,17057,17058,17059,17060,17061,17062,17063,17064,17065,
17066,17067,17068,17069,17070,17071,17072,17073,17074,17075,17076,17077,
17078,17079,17080,17081,17082,17083,17084,17085,17086,17087,17088,17089,
17090,17091,17092,17093,17094,17095,17096,17097,17098,17099,17100,17101,
17102,17103,17104,17105,17106,17107,17108,17109,17110,17111,17112,17113,
17114,17115,17116,17117,17118,17119,17120,17121,17122,17123,17124,17125,
17126,17127,17128,17129,17130,17131,17132,17133,17134,17135,17136,17137,
17138,17139,17140,17141,17142,17143,17144,17145,17146,17147,17148,17149,
17150,17151,17152,17153,17154,17155,17156,17157,17158,17159,17160,17161,
17162,17163,17164,17165,17166,17167,17168,17169,17170,17171,17172,17173,
17174,17175,17176,17177,17178,17179,17180,17181,17182,17183,17184,17185,
17186,17187,17188,17189,17190,17191,17192,17193,17194,17195,17196,17197,
17198,17199,17200,17201,17202,17203,17204,17205,17206,17207,17208,17209,
17210,17211,17212,17213,17214,17215,17216,17217,17218,17219,17220,17221,
17222,17223,17224,17225,17226,17227,17228,17229,17230,17231,17232,17233,
17234,17235,17236,17237,17238,17239,17240,17241,17242,17243,17244,17245,
17246,17247,17248,17249,17250,17251,17252,17253,17254,17255,17256,17257,
17258,17259,17260,17261,17262,17263,17264,17265,17266,17267,17268,17269,
17270,17271,17272,17273,17274,17275,17276,17277,17278,17279,17280,17281,
17282,17283,17284,17285,17286,17287,17288,17289,17290,17291,17292,17293,
17294,17295,17296,17297,17298,17299,17300,17301,17302,17303,17304,17305,
17306,17307,17308,17309,17310,17311,17312,17313,17314,17315,17316,17317,
17318,17319,17320,17321,17322,17323,17324,17325,17326,17327,17328,17329,
17330,17331,17332,17333,17334,17335,17336,17337,17338,17339,17340,17341,
17342,17343,17344,17345,17346,17347,17348,17349,17350,17351,17352,17353,
17354,17355,17356,17357,17358,17359,17360,17361,17362,17363,17364,17365,
17366,17367,17368,17369,17370,17371,17372,17373,17374,17375,17376,17377,
17378,17379,17380,17381,17382,17383,17384,17385,17386,17387,17388,17389,
17390,17391,17392,17393,17394,17395,17396,17397,17398,17399,17400,17401,
17402,17403,17404,17405,17406,17407,17408,17409,17410,17411,17412,17413,
17414,17415,17416,17417,17418,17419,17420,17421,17422,17423,17424,17425,
17426,17427,17428,17429,17430,17431,17432,17433,17434,17435,17436,17437,
17438,17439,17440,17441,17442,17443,17444,17445,17446,17447,17448,17449,
17450,17451,17452,17453,17454,17455,17456,17457,17458,17459,17460,17461,
17462,17463,17464,17465,17466,17467,17468,17469,17470,17471,17472,17473,
17474,17475,17476,17477,17478,17479,17480,17481,17482,17483,17484,17485,
17486,17487,17488,17489,17490,17491,17492,17493,17494,17495,17496,17497,
17498,17499,17500,17501,17502,17503,17504,17505,17506,17507,17508,17509,
17510,17511,17512,17513,17514,17515,17516,17517,17518,17519,17520,17521,
17522,17523,17524,17525,17526,17527,17528,17529,17530,17531,17532,17533,
17534,17535,17536,17537,17538,17539,17540,17541,17542,17543,17544,17545,
17546,17547,17548,17549,17550,17551,17552,17553,17554,17555,17556,17557,
17558,17559,17560,17561,17562,17563,17564,17565,17566,17567,17568,17569,
17570,17571,17572,17573,17574,17575,17576,17577,17578,17579,17580,17581,
17582,17583,17584,17585,17586,17587,17588,17589,17590,17591,17592,17593,
17594,17595,17596,17597,17598,17599,17600,17601,17602,17603,17604,17605,
17606,17607,17608,17609,17610,17611,17612,17613,17614,17615,17616,17617,
17618,17619,17620,17621,17622,17623,17624,17625,17626,17627,17628,17629,
17630,17631,17632,17633,17634,17635,17636,17637,17638,17639,17640,17641,
17642,17643,17644,17645,17646,17647,17648,17649,17650,17651,17652,17653,
17654,17655,17656,17657,17658,17659,17660,17661,17662,17663,17664,17665,
17666,17667,17668,17669,17670,17671,17672,17673,17674,17675,17676,17677,
17678,17679,17680,17681,17682,17683,17684,17685,17686,17687,17688,17689,
17690,17691,17692,17693,17694,17695,17696,17697,17698,17699,17700,17701,
17702,17703,17704,17705,17706,17707,17708,17709,17710,17711,17712,17713,
17714,17715,17716,17717,17718,17719,17720,17721,17722,17723,17724,17725,
17726,17727,17728,17729,17730,17731,17732,17733,17734,17735,17736,17737,
17738,17739,17740,17741,17742,17743,17744,17745,17746,17747,17748,17749,
17750,17751,17752,17753,17754,17755,17756,17757,17758,17759,17760,17761,
17762,17763,17764,17765,17766,17767,17768,17769,17770,17771,17772,17773,
17774,17775,17776,17777,17778,17779,17780,17781,17782,17783,17784,17785,
17786,17787,17788,17789,17790,17791,17792,17793,17794,17795,17796,17797,
17798,17799,17800,17801,17802,17803,17804,17805,17806,17807,17808,17809,
17810,17811,17812,17813,17814,17815,17816,17817,17818,17819,17820,17821,
17822,17823,17824,17825,17826,17827,17828,17829,17830,17831,17832,17833,
17834,17835,17836,17837,17838,17839,17840,17841,17842,17843,17844,17845,
17846,17847,17848,17849,17850,17851,17852,17853,17854,17855,17856,17857,
17858,17859,17860,17861,17862,17863,17864,17865,17866,17867,17868,17869,
17870,17871,17872,17873,17874,17875,17876,17877,17878,17879,17880,17881,
17882,17883,17884,17885,17886,17887,17888,17889,17890,17891,17892,17893,
17894,17895,17896,17897,17898,17899,17900,17901,17902,17903,17904,17905,
17906,17907,17908,17909,17910,17911,17912,17913,17914,17915,17916,17917,
17918,17919,17920,17921,17922,17923,17924,17925,17926,17927,17928,17929,
17930,17931,17932,17933,17934,17935,17936,17937,17938,17939,17940,17941,
17942,17943,17944,17945,17946,17947,17948,17949,17950,17951,17952,17953,
17954,17955,17956,17957,17958,17959,17960,17961,17962,17963,17964,17965,
17966,17967,17968,17969,17970,17971,17972,17973,17974,17975,17976,17977,
17978,17979,17980,17981,17982,17983,17984,17985,17986,17987,17988,17989,
17990,17991,17992,17993,17994,17995,17996,17997,17998,17999,18000,18001,
18002,18003,18004,18005,18006,18007,18008,18009,18010,18011,18012,18013,
18014,18015,18016,18017,18018,18019,18020,18021,18022,18023,18024,18025,
18026,18027,18028,18029,18030,18031,18032,18033,18034,18035,18036,18037,
18038,18039,18040,18041,18042,18043,18044,18045,18046,18047,18048,18049,
18050,18051,18052,18053,18054,18055,18056,18057,18058,18059,18060,18061,
18062,18063,18064,18065,18066,18067,18068,18069,18070,18071,18072,18073,
18074,18075,18076,18077,18078,18079,18080,18081,18082,18083,18084,18085,
18086,18087,18088,18089,18090,18091,18092,18093,18094,18095,18096,18097,
18098,18099,18100,18101,18102,18103,18104,18105,18106,18107,18108,18109,
18110,18111,18112,18113,18114,18115,18116,18117,18118,18119,18120,18121,
18122,18123,18124,18125,18126,18127,18128,18129,18130,18131,18132,18133,
18134,18135,18136,18137,18138,18139,18140,18141,18142,18143,18144,18145,
18146,18147,18148,18149,18150,18151,18152,18153,18154,18155,18156,18157,
18158,18159,18160,18161,18162,18163,18164,18165,18166,18167,18168,18169,
18170,18171,18172,18173,18174,18175,18176,18177,18178,18179,18180,18181,
18182,18183,18184,18185,18186,18187,18188,18189,18190,18191,18192,18193,
18194,18195,18196,18197,18198,18199,18200,18201,18202,18203,18204,18205,
18206,18207,18208,18209,18210,18211,18212,18213,18214,18215,18216,18217,
18218,18219,18220,18221,18222,18223,18224,18225,18226,18227,18228,18229,
18230,18231,18232,18233,18234,18235,18236,18237,18238,18239,18240,18241,
18242,18243,18244,18245,18246,18247,18248,18249,18250,18251,18252,18253,
18254,18255,18256,18257,18258,18259,18260,18261,18262,18263,18264,18265,
18266,18267,18268,18269,18270,18271,18272,18273,18274,18275,18276,18277,
18278,18279,18280,18281,18282,18283,18284,18285,18286,18287,18288,18289,
18290,18291,18292,18293,18294,18295,18296,18297,18298,18299,18300,18301,
18302,18303,18304,18305,18306,18307,18308,18309,18310,18311,18312,18313,
18314,18315,18316,18317,18318,18319,18320,18321,18322,18323,18324,18325,
18326,18327,18328,18329,18330,18331,18332,18333,18334,18335,18336,18337,
18338,18339,18340,18341,18342,18343,18344,18345,18346,18347,18348,18349,
18350,18351,18352,18353,18354,18355,18356,18357,18358,18359,18360,18361,
18362,18363,18364,18365,18366,18367,18368,18369,18370,18371,18372,18373,
18374,18375,18376,18377,18378,18379,18380,18381,18382,18383,18384,18385,
18386,18387,18388,18389,18390,18391,18392,18393,18394,18395,18396,18397,
18398,18399,18400,18401,18402,18403,18404,18405,18406,18407,18408,18409,
18410,18411,18412,18413,18414,18415,18416,18417,18418,18419,18420,18421,
18422,18423,18424,18425,18426,18427,18428,18429,18430,18431,18432,18433,
18434,18435,18436,18437,18438,18439,18440,18441,18442,18443,18444,18445,
18446,18447,18448,18449,18450,18451,18452,18453,18454,18455,18456,18457,
18458,18459,18460,18461,18462,18463,18464,18465,18466,18467,18468,18469,
18470,18471,18472,18473,18474,18475,18476,18477,18478,18479,18480,18481,
18482,18483,18484,18485,18486,18487,18488,18489,18490,18491,18492,18493,
18494,18495,18496,18497,18498,18499,18500,18501,18502,18503,18504,18505,
18506,18507,18508,18509,18510,18511,18512,18513,18514,18515,18516,18517,
18518,18519,18520,18521,18522,18523,18524,18525,18526,18527,18528,18529,
18530,18531,18532,18533,18534,18535,18536,18537,18538,18539,18540,18541,
18542,18543,18544,18545,18546,18547,18548,18549,18550,18551,18552,18553,
18554,18555,18556,18557,18558,18559,18560,18561,18562,18563,18564,18565,
18566,18567,18568,18569,18570,18571,18572,18573,18574,18575,18576,18577,
18578,18579,18580,18581,18582,18583,18584,18585,18586,18587,18588,18589,
18590,18591,18592,18593,18594,18595,18596,18597,18598,18599,18600,18601,
18602,18603,18604,18605,18606,18607,18608,18609,18610,18611,18612,18613,
18614,18615,18616,18617,18618,18619,18620,18621,18622,18623,18624,18625,
18626,18627,18628,18629,18630,18631,18632,18633,18634,18635,18636,18637,
18638,18639,18640,18641,18642,18643,18644,18645,18646,18647,18648,18649,
18650,18651,18652,18653,18654,18655,18656,18657,18658,18659,18660,18661,
18662,18663,18664,18665,18666,18667,18668,18669,18670,18671,18672,18673,
18674,18675,18676,18677,18678,18679,18680,18681,18682,18683,18684,18685,
18686,18687,18688,18689,18690,18691,18692,18693,18694,18695,18696,18697,
18698,18699,18700,18701,18702,18703,18704,18705,18706,18707,18708,18709,
18710,18711,18712,18713,18714,18715,18716,18717,18718,18719,18720,18721,
18722,18723,18724,18725,18726,18727,18728,18729,18730,18731,18732,18733,
18734,18735,18736,18737,18738,18739,18740,18741,18742,18743,18744,18745,
18746,18747,18748,18749,18750,18751,18752,18753,18754,18755,18756,18757,
18758,18759,18760,18761,18762,18763,18764,18765,18766,18767,18768,18769,
18770,18771,18772,18773,18774,18775,18776,18777,18778,18779,18780,18781,
18782,18783,18784,18785,18786,18787,18788,18789,18790,18791,18792,18793,
18794,18795,18796,18797,18798,18799,18800,18801,18802,18803,18804,18805,
18806,18807,18808,18809,18810,18811,18812,18813,18814,18815,18816,18817,
18818,18819,18820,18821,18822,18823,18824,18825,18826,18827,18828,18829,
18830,18831,18832,18833,18834,18835,18836,18837,18838,18839,18840,18841,
18842,18843,18844,18845,18846,18847,18848,18849,18850,18851,18852,18853,
18854,18855,18856,18857,18858,18859,18860,18861,18862,18863,18864,18865,
18866,18867,18868,18869,18870,18871,18872,18873,18874,18875,18876,18877,
18878,18879,18880,18881,18882,18883,18884,18885,18886,18887,18888,18889,
18890,18891,18892,18893,18894,18895,18896,18897,18898,18899,18900,18901,
18902,18903,18904,18905,18906,18907,18908,18909,18910,18911,18912,18913,
18914,18915,18916,18917,18918,18919,18920,18921,18922,18923,18924,18925,
18926,18927,18928,18929,18930,18931,18932,18933,18934,18935,18936,18937,
18938,18939,18940,18941,18942,18943,18944,18945,18946,18947,18948,18949,
18950,18951,18952,18953,18954,18955,18956,18957,18958,18959,18960,18961,
18962,18963,18964,18965,18966,18967,18968,18969,18970,18971,18972,18973,
18974,18975,18976,18977,18978,18979,18980,18981,18982,18983,18984,18985,
18986,18987,18988,18989,18990,18991,18992,18993,18994,18995,18996,18997,
18998,18999,19000,19001,19002,19003,19004,19005,19006,19007,19008,19009,
19010,19011,19012,19013,19014,19015,19016,19017,19018,19019,19020,19021,
19022,19023,19024,19025,19026,19027,19028,19029,19030,19031,19032,19033,
19034,19035,19036,19037,19038,19039,19040,19041,19042,19043,19044,19045,
19046,19047,19048,19049,19050,19051,19052,19053,19054,19055,19056,19057,
19058,19059,19060,19061,19062,19063,19064,19065,19066,19067,19068,19069,
19070,19071,19072,19073,19074,19075,19076,19077,19078,19079,19080,19081,
19082,19083,19084,19085,19086,19087,19088,19089,19090,19091,19092,19093,
19094,19095,19096,19097,19098,19099,19100,19101,19102,19103,19104,19105,
19106,19107,19108,19109,19110,19111,19112,19113,19114,19115,19116,19117,
19118,19119,19120,19121,19122,19123,19124,19125,19126,19127,19128,19129,
19130,19131,19132,19133,19134,19135,19136,19137,19138,19139,19140,19141,
19142,19143,19144,19145,19146,19147,19148,19149,19150,19151,19152,19153,
19154,19155,19156,19157,19158,19159,19160,19161,19162,19163,19164,19165,
19166,19167,19168,19169,19170,19171,19172,19173,19174,19175,19176,19177,
19178,19179,19180,19181,19182,19183,19184,19185,19186,19187,19188,19189,
19190,19191,19192,19193,19194,19195,19196,19197,19198,19199,19200,19201,
19202,19203,19204,19205,19206,19207,19208,19209,19210,19211,19212,19213,
19214,19215,19216,19217,19218,19219,19220,19221,19222,19223,19224,19225,
19226,19227,19228,19229,19230,19231,19232,19233,19234,19235,19236,19237,
19238,19239,19240,19241,19242,19243,19244,19245,19246,19247,19248,19249,
19250,19251,19252,19253,19254,19255,19256,19257,19258,19259,19260,19261,
19262,19263,19264,19265,19266,19267,19268,19269,19270,19271,19272,19273,
19274,19275,19276,19277,19278,19279,19280,19281,19282,19283,19284,19285,
19286,19287,19288,19289,19290,19291,19292,19293,19294,19295,19296,19297,
19298,19299,19300,19301,19302,19303,19304,19305,19306,19307,19308,19309,
19310,19311,19312,19313,19314,19315,19316,19317,19318,19319,19320,19321,
19322,19323,19324,19325,19326,19327,19328,19329,19330,19331,19332,19333,
19334,19335,19336,19337,19338,19339,19340,19341,19342,19343,19344,19345,
19346,19347,19348,19349,19350,19351,19352,19353,19354,19355,19356,19357,
19358,19359,19360,19361,19362,19363,19364,19365,19366,19367,19368,19369,
19370,19371,19372,19373,19374,19375,19376,19377,19378,19379,19380,19381,
19382,19383,19384,19385,19386,19387,19388,19389,19390,19391,19392,19393,
19394,19395,19396,19397,19398,19399,19400,19401,19402,19403,19404,19405,
19406,19407,19408,19409,19410,19411,19412,19413,19414,19415,19416,19417,
19418,19419,19420,19421,19422,19423,19424,19425,19426,19427,19428,19429,
19430,19431,19432,19433,19434,19435,19436,19437,19438,19439,19440,19441,
19442,19443,19444,19445,19446,19447,19448,19449,19450,19451,19452,19453,
19454,19455,19456,19457,19458,19459,19460,19461,19462,19463,19464,19465,
19466,19467,19468,19469,19470,19471,19472,19473,19474,19475,19476,19477,
19478,19479,19480,19481,19482,19483,19484,19485,19486,19487,19488,19489,
19490,19491,19492,19493,19494,19495,19496,19497,19498,19499,19500,19501,
19502,19503,19504,19505,19506,19507,19508,19509,19510,19511,19512,19513,
19514,19515,19516,19517,19518,19519,19520,19521,19522,19523,19524,19525,
19526,19527,19528,19529,19530,19531,19532,19533,19534,19535,19536,19537,
19538,19539,19540,19541,19542,19543,19544,19545,19546,19547,19548,19549,
19550,19551,19552,19553,19554,19555,19556,19557,19558,19559,19560,19561,
19562,19563,19564,19565,19566,19567,19568,19569,19570,19571,19572,19573,
19574,19575,19576,19577,19578,19579,19580,19581,19582,19583,19584,19585,
19586,19587,19588,19589,19590,19591,19592,19593,19594,19595,19596,19597,
19598,19599,19600,19601,19602,19603,19604,19605,19606,19607,19608,19609,
19610,19611,19612,19613,19614,19615,19616,19617,19618,19619,19620,19621,
19622,19623,19624,19625,19626,19627,19628,19629,19630,19631,19632,19633,
19634,19635,19636,19637,19638,19639,19640,19641,19642,19643,19644,19645,
19646,19647,19648,19649,19650,19651,19652,19653,19654,19655,19656,19657,
19658,19659,19660,19661,19662,19663,19664,19665,19666,19667,19668,19669,
19670,19671,19672,19673,19674,19675,19676,19677,19678,19679,19680,19681,
19682,19683,19684,19685,19686,19687,19688,19689,19690,19691,19692,19693,
19694,19695,19696,19697,19698,19699,19700,19701,19702,19703,19704,19705,
19706,19707,19708,19709,19710,19711,19712,19713,19714,19715,19716,19717,
19718,19719,19720,19721,19722,19723,19724,19725,19726,19727,19728,19729,
19730,19731,19732,19733,19734,19735,19736,19737,19738,19739,19740,19741,
19742,19743,19744,19745,19746,19747,19748,19749,19750,19751,19752,19753,
19754,19755,19756,19757,19758,19759,19760,19761,19762,19763,19764,19765,
19766,19767,19768,19769,19770,19771,19772,19773,19774,19775,19776,19777,
19778,19779,19780,19781,19782,19783,19784,19785,19786,19787,19788,19789,
19790,19791,19792,19793,19794,19795,19796,19797,19798,19799,19800,19801,
19802,19803,19804,19805,19806,19807,19808,19809,19810,19811,19812,19813,
19814,19815,19816,19817,19818,19819,19820,19821,19822,19823,19824,19825,
19826,19827,19828,19829,19830,19831,19832,19833,19834,19835,19836,19837,
19838,19839,19840,19841,19842,19843,19844,19845,19846,19847,19848,19849,
19850,19851,19852,19853,19854,19855,19856,19857,19858,19859,19860,19861,
19862,19863,19864,19865,19866,19867,19868,19869,19870,19871,19872,19873,
19874,19875,19876,19877,19878,19879,19880,19881,19882,19883,19884,19885,
19886,19887,19888,19889,19890,19891,19892,19893,19894,19895,19896,19897,
19898,19899,19900,19901,19902,19903,19904,19905,19906,19907,19908,19909,
19910,19911,19912,19913,19914,19915,19916,19917,19918,19919,19920,19921,
19922,19923,19924,19925,19926,19927,19928,19929,19930,19931,19932,19933,
19934,19935,19936,19937,19938,19939,19940,19941,19942,19943,19944,19945,
19946,19947,19948,19949,19950,19951,19952,19953,19954,19955,19956,19957,
19958,19959,19960,19961,19962,19963,19964,19965,19966,19967,19968,19969,
19970,19971,19972,19973,19974,19975,19976,19977,19978,19979,19980,19981,
19982,19983,19984,19985,19986,19987,19988,19989,19990,19991,19992,19993,
19994,19995,19996,19997,19998,19999,20000,20001,20002,20003,20004,20005,
20006,20007,20008,20009,20010,20011,20012,20013,20014,20015,20016,20017,
20018,20019,20020,20021,20022,20023,20024,20025,20026,20027,20028,20029,
20030,20031,20032,20033,20034,20035,20036,20037,20038,20039,20040,20041,
20042,20043,20044,20045,20046,20047,20048,20049,20050,20051,20052,20053,
20054,20055,20056,20057,20058,20059,20060,20061,20062,20063,20064,20065,
20066,20067,20068,20069,20070,20071,20072,20073,20074,20075,20076,20077,
20078,20079,20080,20081,20082,20083,20084,20085,20086,20087,20088,20089,
20090,20091,20092,20093,20094,20095,20096,20097,20098,20099,20100,20101,
20102,20103,20104,20105,20106,20107,20108,20109,20110,20111,20112,20113,
20114,20115,20116,20117,20118,20119,20120,20121,20122,20123,20124,20125,
20126,20127,20128,20129,20130,20131,20132,20133,20134,20135,20136,20137,
20138,20139,20140,20141,20142,20143,20144,20145,20146,20147,20148,20149,
20150,20151,20152,20153,20154,20155,20156,20157,20158,20159,20160,20161,
20162,20163,20164,20165,20166,20167,20168,20169,20170,20171,20172,20173,
20174,20175,20176,20177,20178,20179,20180,20181,20182,20183,20184,20185,
20186,20187,20188,20189,20190,20191,20192,20193,20194,20195,20196,20197,
20198,20199,20200,20201,20202,20203,20204,20205,20206,20207,20208,20209,
20210,20211,20212,20213,20214,20215,20216,20217,20218,20219,20220,20221,
20222,20223,20224,20225,20226,20227,20228,20229,20230,20231,20232,20233,
20234,20235,20236,20237,20238,20239,20240,20241,20242,20243,20244,20245,
20246,20247,20248,20249,20250,20251,20252,20253,20254,20255,20256,20257,
20258,20259,20260,20261,20262,20263,20264,20265,20266,20267,20268,20269,
20270,20271,20272,20273,20274,20275,20276,20277,20278,20279,20280,20281,
20282,20283,20284,20285,20286,20287,20288,20289,20290,20291,20292,20293,
20294,20295,20296,20297,20298,20299,20300,20301,20302,20303,20304,20305,
20306,20307,20308,20309,20310,20311,20312,20313,20314,20315,20316,20317,
20318,20319,20320,20321,20322,20323,20324,20325,20326,20327,20328,20329,
20330,20331,20332,20333,20334,20335,20336,20337,20338,20339,20340,20341,
20342,20343,20344,20345,20346,20347,20348,20349,20350,20351,20352,20353,
20354,20355,20356,20357,20358,20359,20360,20361,20362,20363,20364,20365,
20366,20367,20368,20369,20370,20371,20372,20373,20374,20375,20376,20377,
20378,20379,20380,20381,20382,20383,20384,20385,20386,20387,20388,20389,
20390,20391,20392,20393,20394,20395,20396,20397,20398,20399,20400,20401,
20402,20403,20404,20405,20406,20407,20408,20409,20410,20411,20412,20413,
20414,20415,20416,20417,20418,20419,20420,20421,20422,20423,20424,20425,
20426,20427,20428,20429,20430,20431,20432,20433,20434,20435,20436,20437,
20438,20439,20440,20441,20442,20443,20444,20445,20446,20447,20448,20449,
20450,20451,20452,20453,20454,20455,20456,20457,20458,20459,20460,20461,
20462,20463,20464,20465,20466,20467,20468,20469,20470,20471,20472,20473,
20474,20475,20476,20477,20478,20479,20480,20481,20482,20483,20484,20485,
20486,20487,20488,20489,20490,20491,20492,20493,20494,20495,20496,20497,
20498,20499,20500,20501,20502,20503,20504,20505,20506,20507,20508,20509,
20510,20511,20512,20513,20514,20515,20516,20517,20518,20519,20520,20521,
20522,20523,20524,20525,20526,20527,20528,20529,20530,20531,20532,20533,
20534,20535,20536,20537,20538,20539,20540,20541,20542,20543,20544,20545,
20546,20547,20548,20549,20550,20551,20552,20553,20554,20555,20556,20557,
20558,20559,20560,20561,20562,20563,20564,20565,20566,20567,20568,20569,
20570,20571,20572,20573,20574,20575,20576,20577,20578,20579,20580,20581,
20582,20583,20584,20585,20586,20587,20588,20589,20590,20591,20592,20593,
20594,20595,20596,20597,20598,20599,20600,20601,20602,20603,20604,20605,
20606,20607,20608,20609,20610,20611,20612,20613,20614,20615,20616,20617,
20618,20619,20620,20621,20622,20623,20624,20625,20626,20627,20628,20629,
20630,20631,20632,20633,20634,20635,20636,20637,20638,20639,20640,20641,
20642,20643,20644,20645,20646,20647,20648,20649,20650,20651,20652,20653,
20654,20655,20656,20657,20658,20659,20660,20661,20662,20663,20664,20665,
20666,20667,20668,20669,20670,20671,20672,20673,20674,20675,20676,20677,
20678,20679,20680,20681,20682,20683,20684,20685,20686,20687,20688,20689,
20690,20691,20692,20693,20694,20695,20696,20697,20698,20699,20700,20701,
20702,20703,20704,20705,20706,20707,20708,20709,20710,20711,20712,20713,
20714,20715,20716,20717,20718,20719,20720,20721,20722,20723,20724,20725,
20726,20727,20728,20729,20730,20731,20732,20733,20734,20735,20736,20737,
20738,20739,20740,20741,20742,20743,20744,20745,20746,20747,20748,20749,
20750,20751,20752,20753,20754,20755,20756,20757,20758,20759,20760,20761,
20762,20763,20764,20765,20766,20767,20768,20769,20770,20771,20772,20773,
20774,20775,20776,20777,20778,20779,20780,20781,20782,20783,20784,20785,
20786,20787,20788,20789,20790,20791,20792,20793,20794,20795,20796,20797,
20798,20799,20800,20801,20802,20803,20804,20805,20806,20807,20808,20809,
20810,20811,20812,20813,20814,20815,20816,20817,20818,20819,20820,20821,
20822,20823,20824,20825,20826,20827,20828,20829,20830,20831,20832,20833,
20834,20835,20836,20837,20838,20839,20840,20841,20842,20843,20844,20845,
20846,20847,20848,20849,20850,20851,20852,20853,20854,20855,20856,20857,
20858,20859,20860,20861,20862,20863,20864,20865,20866,20867,20868,20869,
20870,20871,20872,20873,20874,20875,20876,20877,20878,20879,20880,20881,
20882,20883,20884,20885,20886,20887,20888,20889,20890,20891,20892,20893,
20894,20895,20896,20897,20898,20899,20900,20901,20902,20903,20904,20905,
20906,20907,20908,20909,20910,20911,20912,20913,20914,20915,20916,20917,
20918,20919,20920,20921,20922,20923,20924,20925,20926,20927,20928,20929,
20930,20931,20932,20933,20934,20935,20936,20937,20938,20939,20940,20941,
20942,20943,20944,20945,20946,20947,20948,20949,20950,20951,20952,20953,
20954,20955,20956,20957,20958,20959,20960,20961,20962,20963,20964,20965,
20966,20967,20968,20969,20970,20971,20972,20973,20974,20975,20976,20977,
20978,20979,20980,20981,20982,20983,20984,20985,20986,20987,20988,20989,
20990,20991,20992,20993,20994,20995,20996,20997,20998,20999,21000,21001,
21002,21003,21004,21005,21006,21007,21008,21009,21010,21011,21012,21013,
21014,21015,21016,21017,21018,21019,21020,21021,21022,21023,21024,21025,
21026,21027,21028,21029,21030,21031,21032,21033,21034,21035,21036,21037,
21038,21039,21040,21041,21042,21043,21044,21045,21046,21047,21048,21049,
21050,21051,21052,21053,21054,21055,21056,21057,21058,21059,21060,21061,
21062,21063,21064,21065,21066,21067,21068,21069,21070,21071,21072,21073,
21074,21075,21076,21077,21078,21079,21080,21081,21082,21083,21084,21085,
21086,21087,21088,21089,21090,21091,21092,21093,21094,21095,21096,21097,
21098,21099,21100,21101,21102,21103,21104,21105,21106,21107,21108,21109,
21110,21111,21112,21113,21114,21115,21116,21117,21118,21119,21120,21121,
21122,21123,21124,21125,21126,21127,21128,21129,21130,21131,21132,21133,
21134,21135,21136,21137,21138,21139,21140,21141,21142,21143,21144,21145,
21146,21147,21148,21149,21150,21151,21152,21153,21154,21155,21156,21157,
21158,21159,21160,21161,21162,21163,21164,21165,21166,21167,21168,21169,
21170,21171,21172,21173,21174,21175,21176,21177,21178,21179,21180,21181,
21182,21183,21184,21185,21186,21187,21188,21189,21190,21191,21192,21193,
21194,21195,21196,21197,21198,21199,21200,21201,21202,21203,21204,21205,
21206,21207,21208,21209,21210,21211,21212,21213,21214,21215,21216,21217,
21218,21219,21220,21221,21222,21223,21224,21225,21226,21227,21228,21229,
21230,21231,21232,21233,21234,21235,21236,21237,21238,21239,21240,21241,
21242,21243,21244,21245,21246,21247,21248,21249,21250,21251,21252,21253,
21254,21255,21256,21257,21258,21259,21260,21261,21262,21263,21264,21265,
21266,21267,21268,21269,21270,21271,21272,21273,21274,21275,21276,21277,
21278,21279,21280,21281,21282,21283,21284,21285,21286,21287,21288,21289,
21290,21291,21292,21293,21294,21295,21296,21297,21298,21299,21300,21301,
21302,21303,21304,21305,21306,21307,21308,21309,21310,21311,21312,21313,
21314,21315,21316,21317,21318,21319,21320,21321,21322,21323,21324,21325,
21326,21327,21328,21329,21330,21331,21332,21333,21334,21335,21336,21337,
21338,21339,21340,21341,21342,21343,21344,21345,21346,21347,21348,21349,
21350,21351,21352,21353,21354,21355,21356,21357,21358,21359,21360,21361,
21362,21363,21364,21365,21366,21367,21368,21369,21370,21371,21372,21373,
21374,21375,21376,21377,21378,21379,21380,21381,21382,21383,21384,21385,
21386,21387,21388,21389,21390,21391,21392,21393,21394,21395,21396,21397,
21398,21399,21400,21401,21402,21403,21404,21405,21406,21407,21408,21409,
21410,21411,21412,21413,21414,21415,21416,21417,21418,21419,21420,21421,
21422,21423,21424,21425,21426,21427,21428,21429,21430,21431,21432,21433,
21434,21435,21436,21437,21438,21439,21440,21441,21442,21443,21444,21445,
21446,21447,21448,21449,21450,21451,21452,21453,21454,21455,21456,21457,
21458,21459,21460,21461,21462,21463,21464,21465,21466,21467,21468,21469,
21470,21471,21472,21473,21474,21475,21476,21477,21478,21479,21480,21481,
21482,21483,21484,21485,21486,21487,21488,21489,21490,21491,21492,21493,
21494,21495,21496,21497,21498,21499,21500,21501,21502,21503,21504,21505,
21506,21507,21508,21509,21510,21511,21512,21513,21514,21515,21516,21517,
21518,21519,21520,21521,21522,21523,21524,21525,21526,21527,21528,21529,
21530,21531,21532,21533,21534,21535,21536,21537,21538,21539,21540,21541,
21542,21543,21544,21545,21546,21547,21548,21549,21550,21551,21552,21553,
21554,21555,21556,21557,21558,21559,21560,21561,21562,21563,21564,21565,
21566,21567,21568,21569,21570,21571,21572,21573,21574,21575,21576,21577,
21578,21579,21580,21581,21582,21583,21584,21585,21586,21587,21588,21589,
21590,21591,21592,21593,21594,21595,21596,21597,21598,21599,21600,21601,
21602,21603,21604,21605,21606,21607,21608,21609,21610,21611,21612,21613,
21614,21615,21616,21617,21618,21619,21620,21621,21622,21623,21624,21625,
21626,21627,21628,21629,21630,21631,21632,21633,21634,21635,21636,21637,
21638,21639,21640,21641,21642,21643,21644,21645,21646,21647,21648,21649,
21650,21651,21652,21653,21654,21655,21656,21657,21658,21659,21660,21661,
21662,21663,21664,21665,21666,21667,21668,21669,21670,21671,21672,21673,
21674,21675,21676,21677,21678,21679,21680,21681,21682,21683,21684,21685,
21686,21687,21688,21689,21690,21691,21692,21693,21694,21695,21696,21697,
21698,21699,21700,21701,21702,21703,21704,21705,21706,21707,21708,21709,
21710,21711,21712,21713,21714,21715,21716,21717,21718,21719,21720,21721,
21722,21723,21724,21725,21726,21727,21728,21729,21730,21731,21732,21733,
21734,21735,21736,21737,21738,21739,21740,21741,21742,21743,21744,21745,
21746,21747,21748,21749,21750,21751,21752,21753,21754,21755,21756,21757,
21758,21759,21760,21761,21762,21763,21764,21765,21766,21767,21768,21769,
21770,21771,21772,21773,21774,21775,21776,21777,21778,21779,21780,21781,
21782,21783,21784,21785,21786,21787,21788,21789,21790,21791,21792,21793,
21794,21795,21796,21797,21798,21799,21800,21801,21802,21803,21804,21805,
21806,21807,21808,21809,21810,21811,21812,21813,21814,21815,21816,21817,
21818,21819,21820,21821,21822,21823,21824,21825,21826,21827,21828,21829,
21830,21831,21832,21833,21834,21835,21836,21837,21838,21839,21840,21841,
21842,21843,21844,21845,21846,21847,21848,21849,21850,21851,21852,21853,
21854,21855,21856,21857,21858,21859,21860,21861,21862,21863,21864,21865,
21866,21867,21868,21869,21870,21871,21872,21873,21874,21875,21876,21877,
21878,21879,21880,21881,21882,21883,21884,21885,21886,21887,21888,21889,
21890,21891,21892,21893,21894,21895,21896,21897,21898,21899,21900,21901,
21902,21903,21904,21905,21906,21907,21908,21909,21910,21911,21912,21913,
21914,21915,21916,21917,21918,21919,21920,21921,21922,21923,21924,21925,
21926,21927,21928,21929,21930,21931,21932,21933,21934,21935,21936,21937,
21938,21939,21940,21941,21942,21943,21944,21945,21946,21947,21948,21949,
21950,21951,21952,21953,21954,21955,21956,21957,21958,21959,21960,21961,
21962,21963,21964,21965,21966,21967,21968,21969,21970,21971,21972,21973,
21974,21975,21976,21977,21978,21979,21980,21981,21982,21983,21984,21985,
21986,21987,21988,21989,21990,21991,21992,21993,21994,21995,21996,21997,
21998,21999,22000,22001,22002,22003,22004,22005,22006,22007,22008,22009,
22010,22011,22012,22013,22014,22015,22016,22017,22018,22019,22020,22021,
22022,22023,22024,22025,22026,22027,22028,22029,22030,22031,22032,22033,
22034,22035,22036,22037,22038,22039,22040,22041,22042,22043,22044,22045,
22046,22047,22048,22049,22050,22051,22052,22053,22054,22055,22056,22057,
22058,22059,22060,22061,22062,22063,22064,22065,22066,22067,22068,22069,
22070,22071,22072,22073,22074,22075,22076,22077,22078,22079,22080,22081,
22082,22083,22084,22085,22086,22087,22088,22089,22090,22091,22092,22093,
22094,22095,22096,22097,22098,22099,22100,22101,22102,22103,22104,22105,
22106,22107,22108,22109,22110,22111,22112,22113,22114,22115,22116,22117,
22118,22119,22120,22121,22122,22123,22124,22125,22126,22127,22128,22129,
22130,22131,22132,22133,22134,22135,22136,22137,22138,22139,22140,22141,
22142,22143,22144,22145,22146,22147,22148,22149,22150,22151,22152,22153,
22154,22155,22156,22157,22158,22159,22160,22161,22162,22163,22164,22165,
22166,22167,22168,22169,22170,22171,22172,22173,22174,22175,22176,22177,
22178,22179,22180,22181,22182,22183,22184,22185,22186,22187,22188,22189,
22190,22191,22192,22193,22194,22195,22196,22197,22198,22199,22200,22201,
22202,22203,22204,22205,22206,22207,22208,22209,22210,22211,22212,22213,
22214,22215,22216,22217,22218,22219,22220,22221,22222,22223,22224,22225,
22226,22227,22228,22229,22230,22231,22232,22233,22234,22235,22236,22237,
22238,22239,22240,22241,22242,22243,22244,22245,22246,22247,22248,22249,
22250,22251,22252,22253,22254,22255,22256,22257,22258,22259,22260,22261,
22262,22263,22264,22265,22266,22267,22268,22269,22270,22271,22272,22273,
22274,22275,22276,22277,22278,22279,22280,22281,22282,22283,22284,22285,
22286,22287,22288,22289,22290,22291,22292,22293,22294,22295,22296,22297,
22298,22299,22300,22301,22302,22303,22304,22305,22306,22307,22308,22309,
22310,22311,22312,22313,22314,22315,22316,22317,22318,22319,22320,22321,
22322,22323,22324,22325,22326,22327,22328,22329,22330,22331,22332,22333,
22334,22335,22336,22337,22338,22339,22340,22341,22342,22343,22344,22345,
22346,22347,22348,22349,22350,22351,22352,22353,22354,22355,22356,22357,
22358,22359,22360,22361,22362,22363,22364,22365,22366,22367,22368,22369,
22370,22371,22372,22373,22374,22375,22376,22377,22378,22379,22380,22381,
22382,22383,22384,22385,22386,22387,22388,22389,22390,22391,22392,22393,
22394,22395,22396,22397,22398,22399,22400,22401,22402,22403,22404,22405,
22406,22407,22408,22409,22410,22411,22412,22413,22414,22415,22416,22417,
22418,22419,22420,22421,22422,22423,22424,22425,22426,22427,22428,22429,
22430,22431,22432,22433,22434,22435,22436,22437,22438,22439,22440,22441,
22442,22443,22444,22445,22446,22447,22448,22449,22450,22451,22452,22453,
22454,22455,22456,22457,22458,22459,22460,22461,22462,22463,22464,22465,
22466,22467,22468,22469,22470,22471,22472,22473,22474,22475,22476,22477,
22478,22479,22480,22481,22482,22483,22484,22485,22486,22487,22488,22489,
22490,22491,22492,22493,22494,22495,22496,22497,22498,22499,22500,22501,
22502,22503,22504,22505,22506,22507,22508,22509,22510,22511,22512,22513,
22514,22515,22516,22517,22518,22519,22520,22521,22522,22523,22524,22525,
22526,22527,22528,22529,22530,22531,22532,22533,22534,22535,22536,22537,
22538,22539,22540,22541,22542,22543,22544,22545,22546,22547,22548,22549,
22550,22551,22552,22553,22554,22555,22556,22557,22558,22559,22560,22561,
22562,22563,22564,22565,22566,22567,22568,22569,22570,22571,22572,22573,
22574,22575,22576,22577,22578,22579,22580,22581,22582,22583,22584,22585,
22586,22587,22588,22589,22590,22591,22592,22593,22594,22595,22596,22597,
22598,22599,22600,22601,22602,22603,22604,22605,22606,22607,22608,22609,
22610,22611,22612,22613,22614,22615,22616,22617,22618,22619,22620,22621,
22622,22623,22624,22625,22626,22627,22628,22629,22630,22631,22632,22633,
22634,22635,22636,22637,22638,22639,22640,22641,22642,22643,22644,22645,
22646,22647,22648,22649,22650,22651,22652,22653,22654,22655,22656,22657,
22658,22659,22660,22661,22662,22663,22664,22665,22666,22667,22668,22669,
22670,22671,22672,22673,22674,22675,22676,22677,22678,22679,22680,22681,
22682,22683,22684,22685,22686,22687,22688,22689,22690,22691,22692,22693,
22694,22695,22696,22697,22698,22699,22700,22701,22702,22703,22704,22705,
22706,22707,22708,22709,22710,22711,22712,22713,22714,22715,22716,22717,
22718,22719,22720,22721,22722,22723,22724,22725,22726,22727,22728,22729,
22730,22731,22732,22733,22734,22735,22736,22737,22738,22739,22740,22741,
22742,22743,22744,22745,22746,22747,22748,22749,22750,22751,22752,22753,
22754,22755,22756,22757,22758,22759,22760,22761,22762,22763,22764,22765,
22766,22767,22768,22769,22770,22771,22772,22773,22774,22775,22776,22777,
22778,22779,22780,22781,22782,22783,22784,22785,22786,22787,22788,22789,
22790,22791,22792,22793,22794,22795,22796,22797,22798,22799,22800,22801,
22802,22803,22804,22805,22806,22807,22808,22809,22810,22811,22812,22813,
22814,22815,22816,22817,22818,22819,22820,22821,22822,22823,22824,22825,
22826,22827,22828,22829,22830,22831,22832,22833,22834,22835,22836,22837,
22838,22839,22840,22841,22842,22843,22844,22845,22846,22847,22848,22849,
22850,22851,22852,22853,22854,22855,22856,22857,22858,22859,22860,22861,
22862,22863,22864,22865,22866,22867,22868,22869,22870,22871,22872,22873,
22874,22875,22876,22877,22878,22879,22880,22881,22882,22883,22884,22885,
22886,22887,22888,22889,22890,22891,22892,22893,22894,22895,22896,22897,
22898,22899,22900,22901,22902,22903,22904,22905,22906,22907,22908,22909,
22910,22911,22912,22913,22914,22915,22916,22917,22918,22919,22920,22921,
22922,22923,22924,22925,22926,22927,22928,22929,22930,22931,22932,22933,
22934,22935,22936,22937,22938,22939,22940,22941,22942,22943,22944,22945,
22946,22947,22948,22949,22950,22951,22952,22953,22954,22955,22956,22957,
22958,22959,22960,22961,22962,22963,22964,22965,22966,22967,22968,22969,
22970,22971,22972,22973,22974,22975,22976,22977,22978,22979,22980,22981,
22982,22983,22984,22985,22986,22987,22988,22989,22990,22991,22992,22993,
22994,22995,22996,22997,22998,22999,23000,23001,23002,23003,23004,23005,
23006,23007,23008,23009,23010,23011,23012,23013,23014,23015,23016,23017,
23018,23019,23020,23021,23022,23023,23024,23025,23026,23027,23028,23029,
23030,23031,23032,23033,23034,23035,23036,23037,23038,23039,23040,23041,
23042,23043,23044,23045,23046,23047,23048,23049,23050,23051,23052,23053,
23054,23055,23056,23057,23058,23059,23060,23061,23062,23063,23064,23065,
23066,23067,23068,23069,23070,23071,23072,23073,23074,23075,23076,23077,
23078,23079,23080,23081,23082,23083,23084,23085,23086,23087,23088,23089,
23090,23091,23092,23093,23094,23095,23096,23097,23098,23099,23100,23101,
23102,23103,23104,23105,23106,23107,23108,23109,23110,23111,23112,23113,
23114,23115,23116,23117,23118,23119,23120,23121,23122,23123,23124,23125,
23126,23127,23128,23129,23130,23131,23132,23133,23134,23135,23136,23137,
23138,23139,23140,23141,23142,23143,23144,23145,23146,23147,23148,23149,
23150,23151,23152,23153,23154,23155,23156,23157,23158,23159,23160,23161,
23162,23163,23164,23165,23166,23167,23168,23169,23170,23171,23172,23173,
23174,23175,23176,23177,23178,23179,23180,23181,23182,23183,23184,23185,
23186,23187,23188,23189,23190,23191,23192,23193,23194,23195,23196,23197,
23198,23199,23200,23201,23202,23203,23204,23205,23206,23207,23208,23209,
23210,23211,23212,23213,23214,23215,23216,23217,23218,23219,23220,23221,
23222,23223,23224,23225,23226,23227,23228,23229,23230,23231,23232,23233,
23234,23235,23236,23237,23238,23239,23240,23241,23242,23243,23244,23245,
23246,23247,23248,23249,23250,23251,23252,23253,23254,23255,23256,23257,
23258,23259,23260,23261,23262,23263,23264,23265,23266,23267,23268,23269,
23270,23271,23272,23273,23274,23275,23276,23277,23278,23279,23280,23281,
23282,23283,23284,23285,23286,23287,23288,23289,23290,23291,23292,23293,
23294,23295,23296,23297,23298,23299,23300,23301,23302,23303,23304,23305,
23306,23307,23308,23309,23310,23311,23312,23313,23314,23315,23316,23317,
23318,23319,23320,23321,23322,23323,23324,23325,23326,23327,23328,23329,
23330,23331,23332,23333,23334,23335,23336,23337,23338,23339,23340,23341,
23342,23343,23344,23345,23346,23347,23348,23349,23350,23351,23352,23353,
23354,23355,23356,23357,23358,23359,23360,23361,23362,23363,23364,23365,
23366,23367,23368,23369,23370,23371,23372,23373,23374,23375,23376,23377,
23378,23379,23380,23381,23382,23383,23384,23385,23386,23387,23388,23389,
23390,23391,23392,23393,23394,23395,23396,23397,23398,23399,23400,23401,
23402,23403,23404,23405,23406,23407,23408,23409,23410,23411,23412,23413,
23414,23415,23416,23417,23418,23419,23420,23421,23422,23423,23424,23425,
23426,23427,23428,23429,23430,23431,23432,23433,23434,23435,23436,23437,
23438,23439,23440,23441,23442,23443,23444,23445,23446,23447,23448,23449,
23450,23451,23452,23453,23454,23455,23456,23457,23458,23459,23460,23461,
23462,23463,23464,23465,23466,23467,23468,23469,23470,23471,23472,23473,
23474,23475,23476,23477,23478,23479,23480,23481,23482,23483,23484,23485,
23486,23487,23488,23489,23490,23491,23492,23493,23494,23495,23496,23497,
23498,23499,23500,23501,23502,23503,23504,23505,23506,23507,23508,23509,
23510,23511,23512,23513,23514,23515,23516,23517,23518,23519,23520,23521,
23522,23523,23524,23525,23526,23527,23528,23529,23530,23531,23532,23533,
23534,23535,23536,23537,23538,23539,23540,23541,23542,23543,23544,23545,
23546,23547,23548,23549,23550,23551,23552,23553,23554,23555,23556,23557,
23558,23559,23560,23561,23562,23563,23564,23565,23566,23567,23568,23569,
23570,23571,23572,23573,23574,23575,23576,23577,23578,23579,23580,23581,
23582,23583,23584,23585,23586,23587,23588,23589,23590,23591,23592,23593,
23594,23595,23596,23597,23598,23599,23600,23601,23602,23603,23604,23605,
23606,23607,23608,23609,23610,23611,23612,23613,23614,23615,23616,23617,
23618,23619,23620,23621,23622,23623,23624,23625,23626,23627,23628,23629,
23630,23631,23632,23633,23634,23635,23636,23637,23638,23639,23640,23641,
23642,23643,23644,23645,23646,23647,23648,23649,23650,23651,23652,23653,
23654,23655,23656,23657,23658,23659,23660,23661,23662,23663,23664,23665,
23666,23667,23668,23669,23670,23671,23672,23673,23674,23675,23676,23677,
23678,23679,23680,23681,23682,23683,23684,23685,23686,23687,23688,23689,
23690,23691,23692,23693,23694,23695,23696,23697,23698,23699,23700,23701,
23702,23703,23704,23705,23706,23707,23708,23709,23710,23711,23712,23713,
23714,23715,23716,23717,23718,23719,23720,23721,23722,23723,23724,23725,
23726,23727,23728,23729,23730,23731,23732,23733,23734,23735,23736,23737,
23738,23739,23740,23741,23742,23743,23744,23745,23746,23747,23748,23749,
23750,23751,23752,23753,23754,23755,23756,23757,23758,23759,23760,23761,
23762,23763,23764,23765,23766,23767,23768,23769,23770,23771,23772,23773,
23774,23775,23776,23777,23778,23779,23780,23781,23782,23783,23784,23785,
23786,23787,23788,23789,23790,23791,23792,23793,23794,23795,23796,23797,
23798,23799,23800,23801,23802,23803,23804,23805,23806,23807,23808,23809,
23810,23811,23812,23813,23814,23815,23816,23817,23818,23819,23820,23821,
23822,23823,23824,23825,23826,23827,23828,23829,23830,23831,23832,23833,
23834,23835,23836,23837,23838,23839,23840,23841,23842,23843,23844,23845,
23846,23847,23848,23849,23850,23851,23852,23853,23854,23855,23856,23857,
23858,23859,23860,23861,23862,23863,23864,23865,23866,23867,23868,23869,
23870,23871,23872,23873,23874,23875,23876,23877,23878,23879,23880,23881,
23882,23883,23884,23885,23886,23887,23888,23889,23890,23891,23892,23893,
23894,23895,23896,23897,23898,23899,23900,23901,23902,23903,23904,23905,
23906,23907,23908,23909,23910,23911,23912,23913,23914,23915,23916,23917,
23918,23919,23920,23921,23922,23923,23924,23925,23926,23927,23928,23929,
23930,23931,23932,23933,23934,23935,23936,23937,23938,23939,23940,23941,
23942,23943,23944,23945,23946,23947,23948,23949,23950,23951,23952,23953,
23954,23955,23956,23957,23958,23959,23960,23961,23962,23963,23964,23965,
23966,23967,23968,23969,23970,23971,23972,23973,23974,23975,23976,23977,
23978,23979,23980,23981,23982,23983,23984,23985,23986,23987,23988,23989,
23990,23991,23992,23993,23994,23995,23996,23997,23998,23999,24000,24001,
24002,24003,24004,24005,24006,24007,24008,24009,24010,24011,24012,24013,
24014,24015,24016,24017,24018,24019,24020,24021,24022,24023,24024,24025,
24026,24027,24028,24029,24030,24031,24032,24033,24034,24035,24036,24037,
24038,24039,24040,24041,24042,24043,24044,24045,24046,24047,24048,24049,
24050,24051,24052,24053,24054,24055,24056,24057,24058,24059,24060,24061,
24062,24063,24064,24065,24066,24067,24068,24069,24070,24071,24072,24073,
24074,24075,24076,24077,24078,24079,24080,24081,24082,24083,24084,24085,
24086,24087,24088,24089,24090,24091,24092,24093,24094,24095,24096,24097,
24098,24099,24100,24101,24102,24103,24104,24105,24106,24107,24108,24109,
24110,24111,24112,24113,24114,24115,24116,24117,24118,24119,24120,24121,
24122,24123,24124,24125,24126,24127,24128,24129,24130,24131,24132,24133,
24134,24135,24136,24137,24138,24139,24140,24141,24142,24143,24144,24145,
24146,24147,24148,24149,24150,24151,24152,24153,24154,24155,24156,24157,
24158,24159,24160,24161,24162,24163,24164,24165,24166,24167,24168,24169,
24170,24171,24172,24173,24174,24175,24176,24177,24178,24179,24180,24181,
24182,24183,24184,24185,24186,24187,24188,24189,24190,24191,24192,24193,
24194,24195,24196,24197,24198,24199,24200,24201,24202,24203,24204,24205,
24206,24207,24208,24209,24210,24211,24212,24213,24214,24215,24216,24217,
24218,24219,24220,24221,24222,24223,24224,24225,24226,24227,24228,24229,
24230,24231,24232,24233,24234,24235,24236,24237,24238,24239,24240,24241,
24242,24243,24244,24245,24246,24247,24248,24249,24250,24251,24252,24253,
24254,24255,24256,24257,24258,24259,24260,24261,24262,24263,24264,24265,
24266,24267,24268,24269,24270,24271,24272,24273,24274,24275,24276,24277,
24278,24279,24280,24281,24282,24283,24284,24285,24286,24287,24288,24289,
24290,24291,24292,24293,24294,24295,24296,24297,24298,24299,24300,24301,
24302,24303,24304,24305,24306,24307,24308,24309,24310,24311,24312,24313,
24314,24315,24316,24317,24318,24319,24320,24321,24322,24323,24324,24325,
24326,24327,24328,24329,24330,24331,24332,24333,24334,24335,24336,24337,
24338,24339,24340,24341,24342,24343,24344,24345,24346,24347,24348,24349,
24350,24351,24352,24353,24354,24355,24356,24357,24358,24359,24360,24361,
24362,24363,24364,24365,24366,24367,24368,24369,24370,24371,24372,24373,
24374,24375,24376,24377,24378,24379,24380,24381,24382,24383,24384,24385,
24386,24387,24388,24389,24390,24391,24392,24393,24394,24395,24396,24397,
24398,24399,24400,24401,24402,24403,24404,24405,24406,24407,24408,24409,
24410,24411,24412,24413,24414,24415,24416,24417,24418,24419,24420,24421,
24422,24423,24424,24425,24426,24427,24428,24429,24430,24431,24432,24433,
24434,24435,24436,24437,24438,24439,24440,24441,24442,24443,24444,24445,
24446,24447,24448,24449,24450,24451,24452,24453,24454,24455,24456,24457,
24458,24459,24460,24461,24462,24463,24464,24465,24466,24467,24468,24469,
24470,24471,24472,24473,24474,24475,24476,24477,24478,24479,24480,24481,
24482,24483,24484,24485,24486,24487,24488,24489,24490,24491,24492,24493,
24494,24495,24496,24497,24498,24499,24500,24501,24502,24503,24504,24505,
24506,24507,24508,24509,24510,24511,24512,24513,24514,24515,24516,24517,
24518,24519,24520,24521,24522,24523,24524,24525,24526,24527,24528,24529,
24530,24531,24532,24533,24534,24535,24536,24537,24538,24539,24540,24541,
24542,24543,24544,24545,24546,24547,24548,24549,24550,24551,24552,24553,
24554,24555,24556,24557,24558,24559,24560,24561,24562,24563,24564,24565,
24566,24567,24568,24569,24570,24571,24572,24573,24574,24575,24576,24577,
24578,24579,24580,24581,24582,24583,24584,24585,24586,24587,24588,24589,
24590,24591,24592,24593,24594,24595,24596,24597,24598,24599,24600,24601,
24602,24603,24604,24605,24606,24607,24608,24609,24610,24611,24612,24613,
24614,24615,24616,24617,24618,24619,24620,24621,24622,24623,24624,24625,
24626,24627,24628,24629,24630,24631,24632,24633,24634,24635,24636,24637,
24638,24639,24640,24641,24642,24643,24644,24645,24646,24647,24648,24649,
24650,24651,24652,24653,24654,24655,24656,24657,24658,24659,24660,24661,
24662,24663,24664,24665,24666,24667,24668,24669,24670,24671,24672,24673,
24674,24675,24676,24677,24678,24679,24680,24681,24682,24683,24684,24685,
24686,24687,24688,24689,24690,24691,24692,24693,24694,24695,24696,24697,
24698,24699,24700,24701,24702,24703,24704,24705,24706,24707,24708,24709,
24710,24711,24712,24713,24714,24715,24716,24717,24718,24719,24720,24721,
24722,24723,24724,24725,24726,24727,24728,24729,24730,24731,24732,24733,
24734,24735,24736,24737,24738,24739,24740,24741,24742,24743,24744,24745,
24746,24747,24748,24749,24750,24751,24752,24753,24754,24755,24756,24757,
24758,24759,24760,24761,24762,24763,24764,24765,24766,24767,24768,24769,
24770,24771,24772,24773,24774,24775,24776,24777,24778,24779,24780,24781,
24782,24783,24784,24785,24786,24787,24788,24789,24790,24791,24792,24793,
24794,24795,24796,24797,24798,24799,24800,24801,24802,24803,24804,24805,
24806,24807,24808,24809,24810,24811,24812,24813,24814,24815,24816,24817,
24818,24819,24820,24821,24822,24823,24824,24825,24826,24827,24828,24829,
24830,24831,24832,24833,24834,24835,24836,24837,24838,24839,24840,24841,
24842,24843,24844,24845,24846,24847,24848,24849,24850,24851,24852,24853,
24854,24855,24856,24857,24858,24859,24860,24861,24862,24863,24864,24865,
24866,24867,24868,24869,24870,24871,24872,24873,24874,24875,24876,24877,
24878,24879,24880,24881,24882,24883,24884,24885,24886,24887,24888,24889,
24890,24891,24892,24893,24894,24895,24896,24897,24898,24899,24900,24901,
24902,24903,24904,24905,24906,24907,24908,24909,24910,24911,24912,24913,
24914,24915,24916,24917,24918,24919,24920,24921,24922,24923,24924,24925,
24926,24927,24928,24929,24930,24931,24932,24933,24934,24935,24936,24937,
24938,24939,24940,24941,24942,24943,24944,24945,24946,24947,24948,24949,
24950,24951,24952,24953,24954,24955,24956,24957,24958,24959,24960,24961,
24962,24963,24964,24965,24966,24967,24968,24969,24970,24971,24972,24973,
24974,24975,24976,24977,24978,24979,24980,24981,24982,24983,24984,24985,
24986,24987,24988,24989,24990,24991,24992,24993,24994,24995,24996,24997,
24998,24999,25000,25001,25002,25003,25004,25005,25006,25007,25008,25009,
25010,25011,25012,25013,25014,25015,25016,25017,25018,25019,25020,25021,
25022,25023,25024,25025,25026,25027,25028,25029,25030,25031,25032,25033,
25034,25035,25036,25037,25038,25039,25040,25041,25042,25043,25044,25045,
25046,25047,25048,25049,25050,25051,25052,25053,25054,25055,25056,25057,
25058,25059,25060,25061,25062,25063,25064,25065,25066,25067,25068,25069,
25070,25071,25072,25073,25074,25075,25076,25077,25078,25079,25080,25081,
25082,25083,25084,25085,25086,25087,25088,25089,25090,25091,25092,25093,
25094,25095,25096,25097,25098,25099,25100,25101,25102,25103,25104,25105,
25106,25107,25108,25109,25110,25111,25112,25113,25114,25115,25116,25117,
25118,25119,25120,25121,25122,25123,25124,25125,25126,25127,25128,25129,
25130,25131,25132,25133,25134,25135,25136,25137,25138,25139,25140,25141,
25142,25143,25144,25145,25146,25147,25148,25149,25150,25151,25152,25153,
25154,25155,25156,25157,25158,25159,25160,25161,25162,25163,25164,25165,
25166,25167,25168,25169,25170,25171,25172,25173,25174,25175,25176,25177,
25178,25179,25180,25181,25182,25183,25184,25185,25186,25187,25188,25189,
25190,25191,25192,25193,25194,25195,25196,25197,25198,25199,25200,25201,
25202,25203,25204,25205,25206,25207,25208,25209,25210,25211,25212,25213,
25214,25215,25216,25217,25218,25219,25220,25221,25222,25223,25224,25225,
25226,25227,25228,25229,25230,25231,25232,25233,25234,25235,25236,25237,
25238,25239,25240,25241,25242,25243,25244,25245,25246,25247,25248,25249,
25250,25251,25252,25253,25254,25255,25256,25257,25258,25259,25260,25261,
25262,25263,25264,25265,25266,25267,25268,25269,25270,25271,25272,25273,
25274,25275,25276,25277,25278,25279,25280,25281,25282,25283,25284,25285,
25286,25287,25288,25289,25290,25291,25292,25293,25294,25295,25296,25297,
25298,25299,25300,25301,25302,25303,25304,25305,25306,25307,25308,25309,
25310,25311,25312,25313,25314,25315,25316,25317,25318,25319,25320,25321,
25322,25323,25324,25325,25326,25327,25328,25329,25330,25331,25332,25333,
25334,25335,25336,25337,25338,25339,25340,25341,25342,25343,25344,25345,
25346,25347,25348,25349,25350,25351,25352,25353,25354,25355,25356,25357,
25358,25359,25360,25361,25362,25363,25364,25365,25366,25367,25368,25369,
25370,25371,25372,25373,25374,25375,25376,25377,25378,25379,25380,25381,
25382,25383,25384,25385,25386,25387,25388,25389,25390,25391,25392,25393,
25394,25395,25396,25397,25398,25399,25400,25401,25402,25403,25404,25405,
25406,25407,25408,25409,25410,25411,25412,25413,25414,25415,25416,25417,
25418,25419,25420,25421,25422,25423,25424,25425,25426,25427,25428,25429,
25430,25431,25432,25433,25434,25435,25436,25437,25438,25439,25440,25441,
25442,25443,25444,25445,25446,25447,25448,25449,25450,25451,25452,25453,
25454,25455,25456,25457,25458,25459,25460,25461,25462,25463,25464,25465,
25466,25467,25468,25469,25470,25471,25472,25473,25474,25475,25476,25477,
25478,25479,25480,25481,25482,25483,25484,25485,25486,25487,25488,25489,
25490,25491,25492,25493,25494,25495,25496,25497,25498,25499,25500,25501,
25502,25503,25504,25505,25506,25507,25508,25509,25510,25511,25512,25513,
25514,25515,25516,25517,25518,25519,25520,25521,25522,25523,25524,25525,
25526,25527,25528,25529,25530,25531,25532,25533,25534,25535,25536,25537,
25538,25539,25540,25541,25542,25543,25544,25545,25546,25547,25548,25549,
25550,25551,25552,25553,25554,25555,25556,25557,25558,25559,25560,25561,
25562,25563,25564,25565,25566,25567,25568,25569,25570,25571,25572,25573,
25574,25575,25576,25577,25578,25579,25580,25581,25582,25583,25584,25585,
25586,25587,25588,25589,25590,25591,25592,25593,25594,25595,25596,25597,
25598,25599,25600,25601,25602,25603,25604,25605,25606,25607,25608,25609,
25610,25611,25612,25613,25614,25615,25616,25617,25618,25619,25620,25621,
25622,25623,25624,25625,25626,25627,25628,25629,25630,25631,25632,25633,
25634,25635,25636,25637,25638,25639,25640,25641,25642,25643,25644,25645,
25646,25647,25648,25649,25650,25651,25652,25653,25654,25655,25656,25657,
25658,25659,25660,25661,25662,25663,25664,25665,25666,25667,25668,25669,
25670,25671,25672,25673,25674,25675,25676,25677,25678,25679,25680,25681,
25682,25683,25684,25685,25686,25687,25688,25689,25690,25691,25692,25693,
25694,25695,25696,25697,25698,25699,25700,25701,25702,25703,25704,25705,
25706,25707,25708,25709,25710,25711,25712,25713,25714,25715,25716,25717,
25718,25719,25720,25721,25722,25723,25724,25725,25726,25727,25728,25729,
25730,25731,25732,25733,25734,25735,25736,25737,25738,25739,25740,25741,
25742,25743,25744,25745,25746,25747,25748,25749,25750,25751,25752,25753,
25754,25755,25756,25757,25758,25759,25760,25761,25762,25763,25764,25765,
25766,25767,25768,25769,25770,25771,25772,25773,25774,25775,25776,25777,
25778,25779,25780,25781,25782,25783,25784,25785,25786,25787,25788,25789,
25790,25791,25792,25793,25794,25795,25796,25797,25798,25799,25800,25801,
25802,25803,25804,25805,25806,25807,25808,25809,25810,25811,25812,25813,
25814,25815,25816,25817,25818,25819,25820,25821,25822,25823,25824,25825,
25826,25827,25828,25829,25830,25831,25832,25833,25834,25835,25836,25837,
25838,25839,25840,25841,25842,25843,25844,25845,25846,25847,25848,25849,
25850,25851,25852,25853,25854,25855,25856,25857,25858,25859,25860,25861,
25862,25863,25864,25865,25866,25867,25868,25869,25870,25871,25872,25873,
25874,25875,25876,25877,25878,25879,25880,25881,25882,25883,25884,25885,
25886,25887,25888,25889,25890,25891,25892,25893,25894,25895,25896,25897,
25898,25899,25900,25901,25902,25903,25904,25905,25906,25907,25908,25909,
25910,25911,25912,25913,25914,25915,25916,25917,25918,25919,25920,25921,
25922,25923,25924,25925,25926,25927,25928,25929,25930,25931,25932,25933,
25934,25935,25936,25937,25938,25939,25940,25941,25942,25943,25944,25945,
25946,25947,25948,25949,25950,25951,25952,25953,25954,25955,25956,25957,
25958,25959,25960,25961,25962,25963,25964,25965,25966,25967,25968,25969,
25970,25971,25972,25973,25974,25975,25976,25977,25978,25979,25980,25981,
25982,25983,25984,25985,25986,25987,25988,25989,25990,25991,25992,25993,
25994,25995,25996,25997,25998,25999,26000,26001,26002,26003,26004,26005,
26006,26007,26008,26009,26010,26011,26012,26013,26014,26015,26016,26017,
26018,26019,26020,26021,26022,26023,26024,26025,26026,26027,26028,26029,
26030,26031,26032,26033,26034,26035,26036,26037,26038,26039,26040,26041,
26042,26043,26044,26045,26046,26047,26048,26049,26050,26051,26052,26053,
26054,26055,26056,26057,26058,26059,26060,26061,26062,26063,26064,26065,
26066,26067,26068,26069,26070,26071,26072,26073,26074,26075,26076,26077,
26078,26079,26080,26081,26082,26083,26084,26085,26086,26087,26088,26089,
26090,26091,26092,26093,26094,26095,26096,26097,26098,26099,26100,26101,
26102,26103,26104,26105,26106,26107,26108,26109,26110,26111,26112,26113,
26114,26115,26116,26117,26118,26119,26120,26121,26122,26123,26124,26125,
26126,26127,26128,26129,26130,26131,26132,26133,26134,26135,26136,26137,
26138,26139,26140,26141,26142,26143,26144,26145,26146,26147,26148,26149,
26150,26151,26152,26153,26154,26155,26156,26157,26158,26159,26160,26161,
26162,26163,26164,26165,26166,26167,26168,26169,26170,26171,26172,26173,
26174,26175,26176,26177,26178,26179,26180,26181,26182,26183,26184,26185,
26186,26187,26188,26189,26190,26191,26192,26193,26194,26195,26196,26197,
26198,26199,26200,26201,26202,26203,26204,26205,26206,26207,26208,26209,
26210,26211,26212,26213,26214,26215,26216,26217,26218,26219,26220,26221,
26222,26223,26224,26225,26226,26227,26228,26229,26230,26231,26232,26233,
26234,26235,26236,26237,26238,26239,26240,26241,26242,26243,26244,26245,
26246,26247,26248,26249,26250,26251,26252,26253,26254,26255,26256,26257,
26258,26259,26260,26261,26262,26263,26264,26265,26266,26267,26268,26269,
26270,26271,26272,26273,26274,26275,26276,26277,26278,26279,26280,26281,
26282,26283,26284,26285,26286,26287,26288,26289,26290,26291,26292,26293,
26294,26295,26296,26297,26298,26299,26300,26301,26302,26303,26304,26305,
26306,26307,26308,26309,26310,26311,26312,26313,26314,26315,26316,26317,
26318,26319,26320,26321,26322,26323,26324,26325,26326,26327,26328,26329,
26330,26331,26332,26333,26334,26335,26336,26337,26338,26339,26340,26341,
26342,26343,26344,26345,26346,26347,26348,26349,26350,26351,26352,26353,
26354,26355,26356,26357,26358,26359,26360,26361,26362,26363,26364,26365,
26366,26367,26368,26369,26370,26371,26372,26373,26374,26375,26376,26377,
26378,26379,26380,26381,26382,26383,26384,26385,26386,26387,26388,26389,
26390,26391,26392,26393,26394,26395,26396,26397,26398,26399,26400,26401,
26402,26403,26404,26405,26406,26407,26408,26409,26410,26411,26412,26413,
26414,26415,26416,26417,26418,26419,26420,26421,26422,26423,26424,26425,
26426,26427,26428,26429,26430,26431,26432,26433,26434,26435,26436,26437,
26438,26439,26440,26441,26442,26443,26444,26445,26446,26447,26448,26449,
26450,26451,26452,26453,26454,26455,26456,26457,26458,26459,26460,26461,
26462,26463,26464,26465,26466,26467,26468,26469,26470,26471,26472,26473,
26474,26475,26476,26477,26478,26479,26480,26481,26482,26483,26484,26485,
26486,26487,26488,26489,26490,26491,26492,26493,26494,26495,26496,26497,
26498,26499,26500,26501,26502,26503,26504,26505,26506,26507,26508,26509,
26510,26511,26512,26513,26514,26515,26516,26517,26518,26519,26520,26521,
26522,26523,26524,26525,26526,26527,26528,26529,26530,26531,26532,26533,
26534,26535,26536,26537,26538,26539,26540,26541,26542,26543,26544,26545,
26546,26547,26548,26549,26550,26551,26552,26553,26554,26555,26556,26557,
26558,26559,26560,26561,26562,26563,26564,26565,26566,26567,26568,26569,
26570,26571,26572,26573,26574,26575,26576,26577,26578,26579,26580,26581,
26582,26583,26584,26585,26586,26587,26588,26589,26590,26591,26592,26593,
26594,26595,26596,26597,26598,26599,26600,26601,26602,26603,26604,26605,
26606,26607,26608,26609,26610,26611,26612,26613,26614,26615,26616,26617,
26618,26619,26620,26621,26622,26623,26624,26625,26626,26627,26628,26629,
26630,26631,26632,26633,26634,26635,26636,26637,26638,26639,26640,26641,
26642,26643,26644,26645,26646,26647,26648,26649,26650,26651,26652,26653,
26654,26655,26656,26657,26658,26659,26660,26661,26662,26663,26664,26665,
26666,26667,26668,26669,26670,26671,26672,26673,26674,26675,26676,26677,
26678,26679,26680,26681,26682,26683,26684,26685,26686,26687,26688,26689,
26690,26691,26692,26693,26694,26695,26696,26697,26698,26699,26700,26701,
26702,26703,26704,26705,26706,26707,26708,26709,26710,26711,26712,26713,
26714,26715,26716,26717,26718,26719,26720,26721,26722,26723,26724,26725,
26726,26727,26728,26729,26730,26731,26732,26733,26734,26735,26736,26737,
26738,26739,26740,26741,26742,26743,26744,26745,26746,26747,26748,26749,
26750,26751,26752,26753,26754,26755,26756,26757,26758,26759,26760,26761,
26762,26763,26764,26765,26766,26767,26768,26769,26770,26771,26772,26773,
26774,26775,26776,26777,26778,26779,26780,26781,26782,26783,26784,26785,
26786,26787,26788,26789,26790,26791,26792,26793,26794,26795,26796,26797,
26798,26799,26800,26801,26802,26803,26804,26805,26806,26807,26808,26809,
26810,26811,26812,26813,26814,26815,26816,26817,26818,26819,26820,26821,
26822,26823,26824,26825,26826,26827,26828,26829,26830,26831,26832,26833,
26834,26835,26836,26837,26838,26839,26840,26841,26842,26843,26844,26845,
26846,26847,26848,26849,26850,26851,26852,26853,26854,26855,26856,26857,
26858,26859,26860,26861,26862,26863,26864,26865,26866,26867,26868,26869,
26870,26871,26872,26873,26874,26875,26876,26877,26878,26879,26880,26881,
26882,26883,26884,26885,26886,26887,26888,26889,26890,26891,26892,26893,
26894,26895,26896,26897,26898,26899,26900,26901,26902,26903,26904,26905,
26906,26907,26908,26909,26910,26911,26912,26913,26914,26915,26916,26917,
26918,26919,26920,26921,26922,26923,26924,26925,26926,26927,26928,26929,
26930,26931,26932,26933,26934,26935,26936,26937,26938,26939,26940,26941,
26942,26943,26944,26945,26946,26947,26948,26949,26950,26951,26952,26953,
26954,26955,26956,26957,26958,26959,26960,26961,26962,26963,26964,26965,
26966,26967,26968,26969,26970,26971,26972,26973,26974,26975,26976,26977,
26978,26979,26980,26981,26982,26983,26984,26985,26986,26987,26988,26989,
26990,26991,26992,26993,26994,26995,26996,26997,26998,26999,27000,27001,
27002,27003,27004,27005,27006,27007,27008,27009,27010,27011,27012,27013,
27014,27015,27016,27017,27018,27019,27020,27021,27022,27023,27024,27025,
27026,27027,27028,27029,27030,27031,27032,27033,27034,27035,27036,27037,
27038,27039,27040,27041,27042,27043,27044,27045,27046,27047,27048,27049,
27050,27051,27052,27053,27054,27055,27056,27057,27058,27059,27060,27061,
27062,27063,27064,27065,27066,27067,27068,27069,27070,27071,27072,27073,
27074,27075,27076,27077,27078,27079,27080,27081,27082,27083,27084,27085,
27086,27087,27088,27089,27090,27091,27092,27093,27094,27095,27096,27097,
27098,27099,27100,27101,27102,27103,27104,27105,27106,27107,27108,27109,
27110,27111,27112,27113,27114,27115,27116,27117,27118,27119,27120,27121,
27122,27123,27124,27125,27126,27127,27128,27129,27130,27131,27132,27133,
27134,27135,27136,27137,27138,27139,27140,27141,27142,27143,27144,27145,
27146,27147,27148,27149,27150,27151,27152,27153,27154,27155,27156,27157,
27158,27159,27160,27161,27162,27163,27164,27165,27166,27167,27168,27169,
27170,27171,27172,27173,27174,27175,27176,27177,27178,27179,27180,27181,
27182,27183,27184,27185,27186,27187,27188,27189,27190,27191,27192,27193,
27194,27195,27196,27197,27198,27199,27200,27201,27202,27203,27204,27205,
27206,27207,27208,27209,27210,27211,27212,27213,27214,27215,27216,27217,
27218,27219,27220,27221,27222,27223,27224,27225,27226,27227,27228,27229,
27230,27231,27232,27233,27234,27235,27236,27237,27238,27239,27240,27241,
27242,27243,27244,27245,27246,27247,27248,27249,27250,27251,27252,27253,
27254,27255,27256,27257,27258,27259,27260,27261,27262,27263,27264,27265,
27266,27267,27268,27269,27270,27271,27272,27273,27274,27275,27276,27277,
27278,27279,27280,27281,27282,27283,27284,27285,27286,27287,27288,27289,
27290,27291,27292,27293,27294,27295,27296,27297,27298,27299,27300,27301,
27302,27303,27304,27305,27306,27307,27308,27309,27310,27311,27312,27313,
27314,27315,27316,27317,27318,27319,27320,27321,27322,27323,27324,27325,
27326,27327,27328,27329,27330,27331,27332,27333,27334,27335,27336,27337,
27338,27339,27340,27341,27342,27343,27344,27345,27346,27347,27348,27349,
27350,27351,27352,27353,27354,27355,27356,27357,27358,27359,27360,27361,
27362,27363,27364,27365,27366,27367,27368,27369,27370,27371,27372,27373,
27374,27375,27376,27377,27378,27379,27380,27381,27382,27383,27384,27385,
27386,27387,27388,27389,27390,27391,27392,27393,27394,27395,27396,27397,
27398,27399,27400,27401,27402,27403,27404,27405,27406,27407,27408,27409,
27410,27411,27412,27413,27414,27415,27416,27417,27418,27419,27420,27421,
27422,27423,27424,27425,27426,27427,27428,27429,27430,27431,27432,27433,
27434,27435,27436,27437,27438,27439,27440,27441,27442,27443,27444,27445,
27446,27447,27448,27449,27450,27451,27452,27453,27454,27455,27456,27457,
27458,27459,27460,27461,27462,27463,27464,27465,27466,27467,27468,27469,
27470,27471,27472,27473,27474,27475,27476,27477,27478,27479,27480,27481,
27482,27483,27484,27485,27486,27487,27488,27489,27490,27491,27492,27493,
27494,27495,27496,27497,27498,27499,27500,27501,27502,27503,27504,27505,
27506,27507,27508,27509,27510,27511,27512,27513,27514,27515,27516,27517,
27518,27519,27520,27521,27522,27523,27524,27525,27526,27527,27528,27529,
27530,27531,27532,27533,27534,27535,27536,27537,27538,27539,27540,27541,
27542,27543,27544,27545,27546,27547,27548,27549,27550,27551,27552,27553,
27554,27555,27556,27557,27558,27559,27560,27561,27562,27563,27564,27565,
27566,27567,27568,27569,27570,27571,27572,27573,27574,27575,27576,27577,
27578,27579,27580,27581,27582,27583,27584,27585,27586,27587,27588,27589,
27590,27591,27592,27593,27594,27595,27596,27597,27598,27599,27600,27601,
27602,27603,27604,27605,27606,27607,27608,27609,27610,27611,27612,27613,
27614,27615,27616,27617,27618,27619,27620,27621,27622,27623,27624,27625,
27626,27627,27628,27629,27630,27631,27632,27633,27634,27635,27636,27637,
27638,27639,27640,27641,27642,27643,27644,27645,27646,27647,27648,27649,
27650,27651,27652,27653,27654,27655,27656,27657,27658,27659,27660,27661,
27662,27663,27664,27665,27666,27667,27668,27669,27670,27671,27672,27673,
27674,27675,27676,27677,27678,27679,27680,27681,27682,27683,27684,27685,
27686,27687,27688,27689,27690,27691,27692,27693,27694,27695,27696,27697,
27698,27699,27700,27701,27702,27703,27704,27705,27706,27707,27708,27709,
27710,27711,27712,27713,27714,27715,27716,27717,27718,27719,27720,27721,
27722,27723,27724,27725,27726,27727,27728,27729,27730,27731,27732,27733,
27734,27735,27736,27737,27738,27739,27740,27741,27742,27743,27744,27745,
27746,27747,27748,27749,27750,27751,27752,27753,27754,27755,27756,27757,
27758,27759,27760,27761,27762,27763,27764,27765,27766,27767,27768,27769,
27770,27771,27772,27773,27774,27775,27776,27777,27778,27779,27780,27781,
27782,27783,27784,27785,27786,27787,27788,27789,27790,27791,27792,27793,
27794,27795,27796,27797,27798,27799,27800,27801,27802,27803,27804,27805,
27806,27807,27808,27809,27810,27811,27812,27813,27814,27815,27816,27817,
27818,27819,27820,27821,27822,27823,27824,27825,27826,27827,27828,27829,
27830,27831,27832,27833,27834,27835,27836,27837,27838,27839,27840,27841,
27842,27843,27844,27845,27846,27847,27848,27849,27850,27851,27852,27853,
27854,27855,27856,27857,27858,27859,27860,27861,27862,27863,27864,27865,
27866,27867,27868,27869,27870,27871,27872,27873,27874,27875,27876,27877,
27878,27879,27880,27881,27882,27883,27884,27885,27886,27887,27888,27889,
27890,27891,27892,27893,27894,27895,27896,27897,27898,27899,27900,27901,
27902,27903,27904,27905,27906,27907,27908,27909,27910,27911,27912,27913,
27914,27915,27916,27917,27918,27919,27920,27921,27922,27923,27924,27925,
27926,27927,27928,27929,27930,27931,27932,27933,27934,27935,27936,27937,
27938,27939,27940,27941,27942,27943,27944,27945,27946,27947,27948,27949,
27950,27951,27952,27953,27954,27955,27956,27957,27958,27959,27960,27961,
27962,27963,27964,27965,27966,27967,27968,27969,27970,27971,27972,27973,
27974,27975,27976,27977,27978,27979,27980,27981,27982,27983,27984,27985,
27986,27987,27988,27989,27990,27991,27992,27993,27994,27995,27996,27997,
27998,27999,28000,28001,28002,28003,28004,28005,28006,28007,28008,28009,
28010,28011,28012,28013,28014,28015,28016,28017,28018,28019,28020,28021,
28022,28023,28024,28025,28026,28027,28028,28029,28030,28031,28032,28033,
28034,28035,28036,28037,28038,28039,28040,28041,28042,28043,28044,28045,
28046,28047,28048,28049,28050,28051,28052,28053,28054,28055,28056,28057,
28058,28059,28060,28061,28062,28063,28064,28065,28066,28067,28068,28069,
28070,28071,28072,28073,28074,28075,28076,28077,28078,28079,28080,28081,
28082,28083,28084,28085,28086,28087,28088,28089,28090,28091,28092,28093,
28094,28095,28096,28097,28098,28099,28100,28101,28102,28103,28104,28105,
28106,28107,28108,28109,28110,28111,28112,28113,28114,28115,28116,28117,
28118,28119,28120,28121,28122,28123,28124,28125,28126,28127,28128,28129,
28130,28131,28132,28133,28134,28135,28136,28137,28138,28139,28140,28141,
28142,28143,28144,28145,28146,28147,28148,28149,28150,28151,28152,28153,
28154,28155,28156,28157,28158,28159,28160,28161,28162,28163,28164,28165,
28166,28167,28168,28169,28170,28171,28172,28173,28174,28175,28176,28177,
28178,28179,28180,28181,28182,28183,28184,28185,28186,28187,28188,28189,
28190,28191,28192,28193,28194,28195,28196,28197,28198,28199,28200,28201,
28202,28203,28204,28205,28206,28207,28208,28209,28210,28211,28212,28213,
28214,28215,28216,28217,28218,28219,28220,28221,28222,28223,28224,28225,
28226,28227,28228,28229,28230,28231,28232,28233,28234,28235,28236,28237,
28238,28239,28240,28241,28242,28243,28244,28245,28246,28247,28248,28249,
28250,28251,28252,28253,28254,28255,28256,28257,28258,28259,28260,28261,
28262,28263,28264,28265,28266,28267,28268,28269,28270,28271,28272,28273,
28274,28275,28276,28277,28278,28279,28280,28281,28282,28283,28284,28285,
28286,28287,28288,28289,28290,28291,28292,28293,28294,28295,28296,28297,
28298,28299,28300,28301,28302,28303,28304,28305,28306,28307,28308,28309,
28310,28311,28312,28313,28314,28315,28316,28317,28318,28319,28320,28321,
28322,28323,28324,28325,28326,28327,28328,28329,28330,28331,28332,28333,
28334,28335,28336,28337,28338,28339,28340,28341,28342,28343,28344,28345,
28346,28347,28348,28349,28350,28351,28352,28353,28354,28355,28356,28357,
28358,28359,28360,28361,28362,28363,28364,28365,28366,28367,28368,28369,
28370,28371,28372,28373,28374,28375,28376,28377,28378,28379,28380,28381,
28382,28383,28384,28385,28386,28387,28388,28389,28390,28391,28392,28393,
28394,28395,28396,28397,28398,28399,28400,28401,28402,28403,28404,28405,
28406,28407,28408,28409,28410,28411,28412,28413,28414,28415,28416,28417,
28418,28419,28420,28421,28422,28423,28424,28425,28426,28427,28428,28429,
28430,28431,28432,28433,28434,28435,28436,28437,28438,28439,28440,28441,
28442,28443,28444,28445,28446,28447,28448,28449,28450,28451,28452,28453,
28454,28455,28456,28457,28458,28459,28460,28461,28462,28463,28464,28465,
28466,28467,28468,28469,28470,28471,28472,28473,28474,28475,28476,28477,
28478,28479,28480,28481,28482,28483,28484,28485,28486,28487,28488,28489,
28490,28491,28492,28493,28494,28495,28496,28497,28498,28499,28500,28501,
28502,28503,28504,28505,28506,28507,28508,28509,28510,28511,28512,28513,
28514,28515,28516,28517,28518,28519,28520,28521,28522,28523,28524,28525,
28526,28527,28528,28529,28530,28531,28532,28533,28534,28535,28536,28537,
28538,28539,28540,28541,28542,28543,28544,28545,28546,28547,28548,28549,
28550,28551,28552,28553,28554,28555,28556,28557,28558,28559,28560,28561,
28562,28563,28564,28565,28566,28567,28568,28569,28570,28571,28572,28573,
28574,28575,28576,28577,28578,28579,28580,28581,28582,28583,28584,28585,
28586,28587,28588,28589,28590,28591,28592,28593,28594,28595,28596,28597,
28598,28599,28600,28601,28602,28603,28604,28605,28606,28607,28608,28609,
28610,28611,28612,28613,28614,28615,28616,28617,28618,28619,28620,28621,
28622,28623,28624,28625,28626,28627,28628,28629,28630,28631,28632,28633,
28634,28635,28636,28637,28638,28639,28640,28641,28642,28643,28644,28645,
28646,28647,28648,28649,28650,28651,28652,28653,28654,28655,28656,28657,
28658,28659,28660,28661,28662,28663,28664,28665,28666,28667,28668,28669,
28670,28671,28672,28673,28674,28675,28676,28677,28678,28679,28680,28681,
28682,28683,28684,28685,28686,28687,28688,28689,28690,28691,28692,28693,
28694,28695,28696,28697,28698,28699,28700,28701,28702,28703,28704,28705,
28706,28707,28708,28709,28710,28711,28712,28713,28714,28715,28716,28717,
28718,28719,28720,28721,28722,28723,28724,28725,28726,28727,28728,28729,
28730,28731,28732,28733,28734,28735,28736,28737,28738,28739,28740,28741,
28742,28743,28744,28745,28746,28747,28748,28749,28750,28751,28752,28753,
28754,28755,28756,28757,28758,28759,28760,28761,28762,28763,28764,28765,
28766,28767,28768,28769,28770,28771,28772,28773,28774,28775,28776,28777,
28778,28779,28780,28781,28782,28783,28784,28785,28786,28787,28788,28789,
28790,28791,28792,28793,28794,28795,28796,28797,28798,28799,28800,28801,
28802,28803,28804,28805,28806,28807,28808,28809,28810,28811,28812,28813,
28814,28815,28816,28817,28818,28819,28820,28821,28822,28823,28824,28825,
28826,28827,28828,28829,28830,28831,28832,28833,28834,28835,28836,28837,
28838,28839,28840,28841,28842,28843,28844,28845,28846,28847,28848,28849,
28850,28851,28852,28853,28854,28855,28856,28857,28858,28859,28860,28861,
28862,28863,28864,28865,28866,28867,28868,28869,28870,28871,28872,28873,
28874,28875,28876,28877,28878,28879,28880,28881,28882,28883,28884,28885,
28886,28887,28888,28889,28890,28891,28892,28893,28894,28895,28896,28897,
28898,28899,28900,28901,28902,28903,28904,28905,28906,28907,28908,28909,
28910,28911,28912,28913,28914,28915,28916,28917,28918,28919,28920,28921,
28922,28923,28924,28925,28926,28927,28928,28929,28930,28931,28932,28933,
28934,28935,28936,28937,28938,28939,28940,28941,28942,28943,28944,28945,
28946,28947,28948,28949,28950,28951,28952,28953,28954,28955,28956,28957,
28958,28959,28960,28961,28962,28963,28964,28965,28966,28967,28968,28969,
28970,28971,28972,28973,28974,28975,28976,28977,28978,28979,28980,28981,
28982,28983,28984,28985,28986,28987,28988,28989,28990,28991,28992,28993,
28994,28995,28996,28997,28998,28999,29000,29001,29002,29003,29004,29005,
29006,29007,29008,29009,29010,29011,29012,29013,29014,29015,29016,29017,
29018,29019,29020,29021,29022,29023,29024,29025,29026,29027,29028,29029,
29030,29031,29032,29033,29034,29035,29036,29037,29038,29039,29040,29041,
29042,29043,29044,29045,29046,29047,29048,29049,29050,29051,29052,29053,
29054,29055,29056,29057,29058,29059,29060,29061,29062,29063,29064,29065,
29066,29067,29068,29069,29070,29071,29072,29073,29074,29075,29076,29077,
29078,29079,29080,29081,29082,29083,29084,29085,29086,29087,29088,29089,
29090,29091,29092,29093,29094,29095,29096,29097,29098,29099,29100,29101,
29102,29103,29104,29105,29106,29107,29108,29109,29110,29111,29112,29113,
29114,29115,29116,29117,29118,29119,29120,29121,29122,29123,29124,29125,
29126,29127,29128,29129,29130,29131,29132,29133,29134,29135,29136,29137,
29138,29139,29140,29141,29142,29143,29144,29145,29146,29147,29148,29149,
29150,29151,29152,29153,29154,29155,29156,29157,29158,29159,29160,29161,
29162,29163,29164,29165,29166,29167,29168,29169,29170,29171,29172,29173,
29174,29175,29176,29177,29178,29179,29180,29181,29182,29183,29184,29185,
29186,29187,29188,29189,29190,29191,29192,29193,29194,29195,29196,29197,
29198,29199,29200,29201,29202,29203,29204,29205,29206,29207,29208,29209,
29210,29211,29212,29213,29214,29215,29216,29217,29218,29219,29220,29221,
29222,29223,29224,29225,29226,29227,29228,29229,29230,29231,29232,29233,
29234,29235,29236,29237,29238,29239,29240,29241,29242,29243,29244,29245,
29246,29247,29248,29249,29250,29251,29252,29253,29254,29255,29256,29257,
29258,29259,29260,29261,29262,29263,29264,29265,29266,29267,29268,29269,
29270,29271,29272,29273,29274,29275,29276,29277,29278,29279,29280,29281,
29282,29283,29284,29285,29286,29287,29288,29289,29290,29291,29292,29293,
29294,29295,29296,29297,29298,29299,29300,29301,29302,29303,29304,29305,
29306,29307,29308,29309,29310,29311,29312,29313,29314,29315,29316,29317,
29318,29319,29320,29321,29322,29323,29324,29325,29326,29327,29328,29329,
29330,29331,29332,29333,29334,29335,29336,29337,29338,29339,29340,29341,
29342,29343,29344,29345,29346,29347,29348,29349,29350,29351,29352,29353,
29354,29355,29356,29357,29358,29359,29360,29361,29362,29363,29364,29365,
29366,29367,29368,29369,29370,29371,29372,29373,29374,29375,29376,29377,
29378,29379,29380,29381,29382,29383,29384,29385,29386,29387,29388,29389,
29390,29391,29392,29393,29394,29395,29396,29397,29398,29399,29400,29401,
29402,29403,29404,29405,29406,29407,29408,29409,29410,29411,29412,29413,
29414,29415,29416,29417,29418,29419,29420,29421,29422,29423,29424,29425,
29426,29427,29428,29429,29430,29431,29432,29433,29434,29435,29436,29437,
29438,29439,29440,29441,29442,29443,29444,29445,29446,29447,29448,29449,
29450,29451,29452,29453,29454,29455,29456,29457,29458,29459,29460,29461,
29462,29463,29464,29465,29466,29467,29468,29469,29470,29471,29472,29473,
29474,29475,29476,29477,29478,29479,29480,29481,29482,29483,29484,29485,
29486,29487,29488,29489,29490,29491,29492,29493,29494,29495,29496,29497,
29498,29499,29500,29501,29502,29503,29504,29505,29506,29507,29508,29509,
29510,29511,29512,29513,29514,29515,29516,29517,29518,29519,29520,29521,
29522,29523,29524,29525,29526,29527,29528,29529,29530,29531,29532,29533,
29534,29535,29536,29537,29538,29539,29540,29541,29542,29543,29544,29545,
29546,29547,29548,29549,29550,29551,29552,29553,29554,29555,29556,29557,
29558,29559,29560,29561,29562,29563,29564,29565,29566,29567,29568,29569,
29570,29571,29572,29573,29574,29575,29576,29577,29578,29579,29580,29581,
29582,29583,29584,29585,29586,29587,29588,29589,29590,29591,29592,29593,
29594,29595,29596,29597,29598,29599,29600,29601,29602,29603,29604,29605,
29606,29607,29608,29609,29610,29611,29612,29613,29614,29615,29616,29617,
29618,29619,29620,29621,29622,29623,29624,29625,29626,29627,29628,29629,
29630,29631,29632,29633,29634,29635,29636,29637,29638,29639,29640,29641,
29642,29643,29644,29645,29646,29647,29648,29649,29650,29651,29652,29653,
29654,29655,29656,29657,29658,29659,29660,29661,29662,29663,29664,29665,
29666,29667,29668,29669,29670,29671,29672,29673,29674,29675,29676,29677,
29678,29679,29680,29681,29682,29683,29684,29685,29686,29687,29688,29689,
29690,29691,29692,29693,29694,29695,29696,29697,29698,29699,29700,29701,
29702,29703,29704,29705,29706,29707,29708,29709,29710,29711,29712,29713,
29714,29715,29716,29717,29718,29719,29720,29721,29722,29723,29724,29725,
29726,29727,29728,29729,29730,29731,29732,29733,29734,29735,29736,29737,
29738,29739,29740,29741,29742,29743,29744,29745,29746,29747,29748,29749,
29750,29751,29752,29753,29754,29755,29756,29757,29758,29759,29760,29761,
29762,29763,29764,29765,29766,29767,29768,29769,29770,29771,29772,29773,
29774,29775,29776,29777,29778,29779,29780,29781,29782,29783,29784,29785,
29786,29787,29788,29789,29790,29791,29792,29793,29794,29795,29796,29797,
29798,29799,29800,29801,29802,29803,29804,29805,29806,29807,29808,29809,
29810,29811,29812,29813,29814,29815,29816,29817,29818,29819,29820,29821,
29822,29823,29824,29825,29826,29827,29828,29829,29830,29831,29832,29833,
29834,29835,29836,29837,29838,29839,29840,29841,29842,29843,29844,29845,
29846,29847,29848,29849,29850,29851,29852,29853,29854,29855,29856,29857,
29858,29859,29860,29861,29862,29863,29864,29865,29866,29867,29868,29869,
29870,29871,29872,29873,29874,29875,29876,29877,29878,29879,29880,29881,
29882,29883,29884,29885,29886,29887,29888,29889,29890,29891,29892,29893,
29894,29895,29896,29897,29898,29899,29900,29901,29902,29903,29904,29905,
29906,29907,29908,29909,29910,29911,29912,29913,29914,29915,29916,29917,
29918,29919,29920,29921,29922,29923,29924,29925,29926,29927,29928,29929,
29930,29931,29932,29933,29934,29935,29936,29937,29938,29939,29940,29941,
29942,29943,29944,29945,29946,29947,29948,29949,29950,29951,29952,29953,
29954,29955,29956,29957,29958,29959,29960,29961,29962,29963,29964,29965,
29966,29967,29968,29969,29970,29971,29972,29973,29974,29975,29976,29977,
29978,29979,29980,29981,29982,29983,29984,29985,29986,29987,29988,29989,
29990,29991,29992,29993,29994,29995,29996,29997,29998,29999,30000,30001,
30002,30003,30004,30005,30006,30007,30008,30009,30010,30011,30012,30013,
30014,30015,30016,30017,30018,30019,30020,30021,30022,30023,30024,30025,
30026,30027,30028,30029,30030,30031,30032,30033,30034,30035,30036,30037,
30038,30039,30040,30041,30042,30043,30044,30045,30046,30047,30048,30049,
30050,30051,30052,30053,30054,30055,30056,30057,30058,30059,30060,30061,
30062,30063,30064,30065,30066,30067,30068,30069,30070,30071,30072,30073,
30074,30075,30076,30077,30078,30079,30080,30081,30082,30083,30084,30085,
30086,30087,30088,30089,30090,30091,30092,30093,30094,30095,30096,30097,
30098,30099,30100,30101,30102,30103,30104,30105,30106,30107,30108,30109,
30110,30111,30112,30113,30114,30115,30116,30117,30118,30119,30120,30121,
30122,30123,30124,30125,30126,30127,30128,30129,30130,30131,30132,30133,
30134,30135,30136,30137,30138,30139,30140,30141,30142,30143,30144,30145,
30146,30147,30148,30149,30150,30151,30152,30153,30154,30155,30156,30157,
30158,30159,30160,30161,30162,30163,30164,30165,30166,30167,30168,30169,
30170,30171,30172,30173,30174,30175,30176,30177,30178,30179,30180,30181,
30182,30183,30184,30185,30186,30187,30188,30189,30190,30191,30192,30193,
30194,30195,30196,30197,30198,30199,30200,30201,30202,30203,30204,30205,
30206,30207,30208,30209,30210,30211,30212,30213,30214,30215,30216,30217,
30218,30219,30220,30221,30222,30223,30224,30225,30226,30227,30228,30229,
30230,30231,30232,30233,30234,30235,30236,30237,30238,30239,30240,30241,
30242,30243,30244,30245,30246,30247,30248,30249,30250,30251,30252,30253,
30254,30255,30256,30257,30258,30259,30260,30261,30262,30263,30264,30265,
30266,30267,30268,30269,30270,30271,30272,30273,30274,30275,30276,30277,
30278,30279,30280,30281,30282,30283,30284,30285,30286,30287,30288,30289,
30290,30291,30292,30293,30294,30295,30296,30297,30298,30299,30300,30301,
30302,30303,30304,30305,30306,30307,30308,30309,30310,30311,30312,30313,
30314,30315,30316,30317,30318,30319,30320,30321,30322,30323,30324,30325,
30326,30327,30328,30329,30330,30331,30332,30333,30334,30335,30336,30337,
30338,30339,30340,30341,30342,30343,30344,30345,30346,30347,30348,30349,
30350,30351,30352,30353,30354,30355,30356,30357,30358,30359,30360,30361,
30362,30363,30364,30365,30366,30367,30368,30369,30370,30371,30372,30373,
30374,30375,30376,30377,30378,30379,30380,30381,30382,30383,30384,30385,
30386,30387,30388,30389,30390,30391,30392,30393,30394,30395,30396,30397,
30398,30399,30400,30401,30402,30403,30404,30405,30406,30407,30408,30409,
30410,30411,30412,30413,30414,30415,30416,30417,30418,30419,30420,30421,
30422,30423,30424,30425,30426,30427,30428,30429,30430,30431,30432,30433,
30434,30435,30436,30437,30438,30439,30440,30441,30442,30443,30444,30445,
30446,30447,30448,30449,30450,30451,30452,30453,30454,30455,30456,30457,
30458,30459,30460,30461,30462,30463,30464,30465,30466,30467,30468,30469,
30470,30471,30472,30473,30474,30475,30476,30477,30478,30479,30480,30481,
30482,30483,30484,30485,30486,30487,30488,30489,30490,30491,30492,30493,
30494,30495,30496,30497,30498,30499,30500,30501,30502,30503,30504,30505,
30506,30507,30508,30509,30510,30511,30512,30513,30514,30515,30516,30517,
30518,30519,30520,30521,30522,30523,30524,30525,30526,30527,30528,30529,
30530,30531,30532,30533,30534,30535,30536,30537,30538,30539,30540,30541,
30542,30543,30544,30545,30546,30547,30548,30549,30550,30551,30552,30553,
30554,30555,30556,30557,30558,30559,30560,30561,30562,30563,30564,30565,
30566,30567,30568,30569,30570,30571,30572,30573,30574,30575,30576,30577,
30578,30579,30580,30581,30582,30583,30584,30585,30586,30587,30588,30589,
30590,30591,30592,30593,30594,30595,30596,30597,30598,30599,30600,30601,
30602,30603,30604,30605,30606,30607,30608,30609,30610,30611,30612,30613,
30614,30615,30616,30617,30618,30619,30620,30621,30622,30623,30624,30625,
30626,30627,30628,30629,30630,30631,30632,30633,30634,30635,30636,30637,
30638,30639,30640,30641,30642,30643,30644,30645,30646,30647,30648,30649,
30650,30651,30652,30653,30654,30655,30656,30657,30658,30659,30660,30661,
30662,30663,30664,30665,30666,30667,30668,30669,30670,30671,30672,30673,
30674,30675,30676,30677,30678,30679,30680,30681,30682,30683,30684,30685,
30686,30687,30688,30689,30690,30691,30692,30693,30694,30695,30696,30697,
30698,30699,30700,30701,30702,30703,30704,30705,30706,30707,30708,30709,
30710,30711,30712,30713,30714,30715,30716,30717,30718,30719,30720,30721,
30722,30723,30724,30725,30726,30727,30728,30729,30730,30731,30732,30733,
30734,30735,30736,30737,30738,30739,30740,30741,30742,30743,30744,30745,
30746,30747,30748,30749,30750,30751,30752,30753,30754,30755,30756,30757,
30758,30759,30760,30761,30762,30763,30764,30765,30766,30767,30768,30769,
30770,30771,30772,30773,30774,30775,30776,30777,30778,30779,30780,30781,
30782,30783,30784,30785,30786,30787,30788,30789,30790,30791,30792,30793,
30794,30795,30796,30797,30798,30799,30800,30801,30802,30803,30804,30805,
30806,30807,30808,30809,30810,30811,30812,30813,30814,30815,30816,30817,
30818,30819,30820,30821,30822,30823,30824,30825,30826,30827,30828,30829,
30830,30831,30832,30833,30834,30835,30836,30837,30838,30839,30840,30841,
30842,30843,30844,30845,30846,30847,30848,30849,30850,30851,30852,30853,
30854,30855,30856,30857,30858,30859,30860,30861,30862,30863,30864,30865,
30866,30867,30868,30869,30870,30871,30872,30873,30874,30875,30876,30877,
30878,30879,30880,30881,30882,30883,30884,30885,30886,30887,30888,30889,
30890,30891,30892,30893,30894,30895,30896,30897,30898,30899,30900,30901,
30902,30903,30904,30905,30906,30907,30908,30909,30910,30911,30912,30913,
30914,30915,30916,30917,30918,30919,30920,30921,30922,30923,30924,30925,
30926,30927,30928,30929,30930,30931,30932,30933,30934,30935,30936,30937,
30938,30939,30940,30941,30942,30943,30944,30945,30946,30947,30948,30949,
30950,30951,30952,30953,30954,30955,30956,30957,30958,30959,30960,30961,
30962,30963,30964,30965,30966,30967,30968,30969,30970,30971,30972,30973,
30974,30975,30976,30977,30978,30979,30980,30981,30982,30983,30984,30985,
30986,30987,30988,30989,30990,30991,30992,30993,30994,30995,30996,30997,
30998,30999,31000,31001,31002,31003,31004,31005,31006,31007,31008,31009,
31010,31011,31012,31013,31014,31015,31016,31017,31018,31019,31020,31021,
31022,31023,31024,31025,31026,31027,31028,31029,31030,31031,31032,31033,
31034,31035,31036,31037,31038,31039,31040,31041,31042,31043,31044,31045,
31046,31047,31048,31049,31050,31051,31052,31053,31054,31055,31056,31057,
31058,31059,31060,31061,31062,31063,31064,31065,31066,31067,31068,31069,
31070,31071,31072,31073,31074,31075,31076,31077,31078,31079,31080,31081,
31082,31083,31084,31085,31086,31087,31088,31089,31090,31091,31092,31093,
31094,31095,31096,31097,31098,31099,31100,31101,31102,31103,31104,31105,
31106,31107,31108,31109,31110,31111,31112,31113,31114,31115,31116,31117,
31118,31119,31120,31121,31122,31123,31124,31125,31126,31127,31128,31129,
31130,31131,31132,31133,31134,31135,31136,31137,31138,31139,31140,31141,
31142,31143,31144,31145,31146,31147,31148,31149,31150,31151,31152,31153,
31154,31155,31156,31157,31158,31159,31160,31161,31162,31163,31164,31165,
31166,31167,31168,31169,31170,31171,31172,31173,31174,31175,31176,31177,
31178,31179,31180,31181,31182,31183,31184,31185,31186,31187,31188,31189,
31190,31191,31192,31193,31194,31195,31196,31197,31198,31199,31200,31201,
31202,31203,31204,31205,31206,31207,31208,31209,31210,31211,31212,31213,
31214,31215,31216,31217,31218,31219,31220,31221,31222,31223,31224,31225,
31226,31227,31228,31229,31230,31231,31232,31233,31234,31235,31236,31237,
31238,31239,31240,31241,31242,31243,31244,31245,31246,31247,31248,31249,
31250,31251,31252,31253,31254,31255,31256,31257,31258,31259,31260,31261,
31262,31263,31264,31265,31266,31267,31268,31269,31270,31271,31272,31273,
31274,31275,31276,31277,31278,31279,31280,31281,31282,31283,31284,31285,
31286,31287,31288,31289,31290,31291,31292,31293,31294,31295,31296,31297,
31298,31299,31300,31301,31302,31303,31304,31305,31306,31307,31308,31309,
31310,31311,31312,31313,31314,31315,31316,31317,31318,31319,31320,31321,
31322,31323,31324,31325,31326,31327,31328,31329,31330,31331,31332,31333,
31334,31335,31336,31337,31338,31339,31340,31341,31342,31343,31344,31345,
31346,31347,31348,31349,31350,31351,31352,31353,31354,31355,31356,31357,
31358,31359,31360,31361,31362,31363,31364,31365,31366,31367,31368,31369,
31370,31371,31372,31373,31374,31375,31376,31377,31378,31379,31380,31381,
31382,31383,31384,31385,31386,31387,31388,31389,31390,31391,31392,31393,
31394,31395,31396,31397,31398,31399,31400,31401,31402,31403,31404,31405,
31406,31407,31408,31409,31410,31411,31412,31413,31414,31415,31416,31417,
31418,31419,31420,31421,31422,31423,31424,31425,31426,31427,31428,31429,
31430,31431,31432,31433,31434,31435,31436,31437,31438,31439,31440,31441,
31442,31443,31444,31445,31446,31447,31448,31449,31450,31451,31452,31453,
31454,31455,31456,31457,31458,31459,31460,31461,31462,31463,31464,31465,
31466,31467,31468,31469,31470,31471,31472,31473,31474,31475,31476,31477,
31478,31479,31480,31481,31482,31483,31484,31485,31486,31487,31488,31489,
31490,31491,31492,31493,31494,31495,31496,31497,31498,31499,31500,31501,
31502,31503,31504,31505,31506,31507,31508,31509,31510,31511,31512,31513,
31514,31515,31516,31517,31518,31519,31520,31521,31522,31523,31524,31525,
31526,31527,31528,31529,31530,31531,31532,31533,31534,31535,31536,31537,
31538,31539,31540,31541,31542,31543,31544,31545,31546,31547,31548,31549,
31550,31551,31552,31553,31554,31555,31556,31557,31558,31559,31560,31561,
31562,31563,31564,31565,31566,31567,31568,31569,31570,31571,31572,31573,
31574,31575,31576,31577,31578,31579,31580,31581,31582,31583,31584,31585,
31586,31587,31588,31589,31590,31591,31592,31593,31594,31595,31596,31597,
31598,31599,31600,31601,31602,31603,31604,31605,31606,31607,31608,31609,
31610,31611,31612,31613,31614,31615,31616,31617,31618,31619,31620,31621,
31622,31623,31624,31625,31626,31627,31628,31629,31630,31631,31632,31633,
31634,31635,31636,31637,31638,31639,31640,31641,31642,31643,31644,31645,
31646,31647,31648,31649,31650,31651,31652,31653,31654,31655,31656,31657,
31658,31659,31660,31661,31662,31663,31664,31665,31666,31667,31668,31669,
31670,31671,31672,31673,31674,31675,31676,31677,31678,31679,31680,31681,
31682,31683,31684,31685,31686,31687,31688,31689,31690,31691,31692,31693,
31694,31695,31696,31697,31698,31699,31700,31701,31702,31703,31704,31705,
31706,31707,31708,31709,31710,31711,31712,31713,31714,31715,31716,31717,
31718,31719,31720,31721,31722,31723,31724,31725,31726,31727,31728,31729,
31730,31731,31732,31733,31734,31735,31736,31737,31738,31739,31740,31741,
31742,31743,31744,31745,31746,31747,31748,31749,31750,31751,31752,31753,
31754,31755,31756,31757,31758,31759,31760,31761,31762,31763,31764,31765,
31766,31767,31768,31769,31770,31771,31772,31773,31774,31775,31776,31777,
31778,31779,31780,31781,31782,31783,31784,31785,31786,31787,31788,31789,
31790,31791,31792,31793,31794,31795,31796,31797,31798,31799,31800,31801,
31802,31803,31804,31805,31806,31807,31808,31809,31810,31811,31812,31813,
31814,31815,31816,31817,31818,31819,31820,31821,31822,31823,31824,31825,
31826,31827,31828,31829,31830,31831,31832,31833,31834,31835,31836,31837,
31838,31839,31840,31841,31842,31843,31844,31845,31846,31847,31848,31849,
31850,31851,31852,31853,31854,31855,31856,31857,31858,31859,31860,31861,
31862,31863,31864,31865,31866,31867,31868,31869,31870,31871,31872,31873,
31874,31875,31876,31877,31878,31879,31880,31881,31882,31883,31884,31885,
31886,31887,31888,31889,31890,31891,31892,31893,31894,31895,31896,31897,
31898,31899,31900,31901,31902,31903,31904,31905,31906,31907,31908,31909,
31910,31911,31912,31913,31914,31915,31916,31917,31918,31919,31920,31921,
31922,31923,31924,31925,31926,31927,31928,31929,31930,31931,31932,31933,
31934,31935,31936,31937,31938,31939,31940,31941,31942,31943,31944,31945,
31946,31947,31948,31949,31950,31951,31952,31953,31954,31955,31956,31957,
31958,31959,31960,31961,31962,31963,31964,31965,31966,31967,31968,31969,
31970,31971,31972,31973,31974,31975,31976,31977,31978,31979,31980,31981,
31982,31983,31984,31985,31986,31987,31988,31989,31990,31991,31992,31993,
31994,31995,31996,31997,31998,31999,32000,32001,32002,32003,32004,32005,
32006,32007,32008,32009,32010,32011,32012,32013,32014,32015,32016,32017,
32018,32019,32020,32021,32022,32023,32024,32025,32026,32027,32028,32029,
32030,32031,32032,32033,32034,32035,32036,32037,32038,32039,32040,32041,
32042,32043,32044,32045,32046,32047,32048,32049,32050,32051,32052,32053,
32054,32055,32056,32057,32058,32059,32060,32061,32062,32063,32064,32065,
32066,32067,32068,32069,32070,32071,32072,32073,32074,32075,32076,32077,
32078,32079,32080,32081,32082,32083,32084,32085,32086,32087,32088,32089,
32090,32091,32092,32093,32094,32095,32096,32097,32098,32099,32100,32101,
32102,32103,32104,32105,32106,32107,32108,32109,32110,32111,32112,32113,
32114,32115,32116,32117,32118,32119,32120,32121,32122,32123,32124,32125,
32126,32127,32128,32129,32130,32131,32132,32133,32134,32135,32136,32137,
32138,32139,32140,32141,32142,32143,32144,32145,32146,32147,32148,32149,
32150,32151,32152,32153,32154,32155,32156,32157,32158,32159,32160,32161,
32162,32163,32164,32165,32166,32167,32168,32169,32170,32171,32172,32173,
32174,32175,32176,32177,32178,32179,32180,32181,32182,32183,32184,32185,
32186,32187,32188,32189,32190,32191,32192,32193,32194,32195,32196,32197,
32198,32199,32200,32201,32202,32203,32204,32205,32206,32207,32208,32209,
32210,32211,32212,32213,32214,32215,32216,32217,32218,32219,32220,32221,
32222,32223,32224,32225,32226,32227,32228,32229,32230,32231,32232,32233,
32234,32235,32236,32237,32238,32239,32240,32241,32242,32243,32244,32245,
32246,32247,32248,32249,32250,32251,32252,32253,32254,32255,32256,32257,
32258,32259,32260,32261,32262,32263,32264,32265,32266,32267,32268,32269,
32270,32271,32272,32273,32274,32275,32276,32277,32278,32279,32280,32281,
32282,32283,32284,32285,32286,32287,32288,32289,32290,32291,32292,32293,
32294,32295,32296,32297,32298,32299,32300,32301,32302,32303,32304,32305,
32306,32307,32308,32309,32310,32311,32312,32313,32314,32315,32316,32317,
32318,32319,32320,32321,32322,32323,32324,32325,32326,32327,32328,32329,
32330,32331,32332,32333,32334,32335,32336,32337,32338,32339,32340,32341,
32342,32343,32344,32345,32346,32347,32348,32349,32350,32351,32352,32353,
32354,32355,32356,32357,32358,32359,32360,32361,32362,32363,32364,32365,
32366,32367,32368,32369,32370,32371,32372,32373,32374,32375,32376,32377,
32378,32379,32380,32381,32382,32383,32384,32385,32386,32387,32388,32389,
32390,32391,32392,32393,32394,32395,32396,32397,32398,32399,32400,32401,
32402,32403,32404,32405,32406,32407,32408,32409,32410,32411,32412,32413,
32414,32415,32416,32417,32418,32419,32420,32421,32422,32423,32424,32425,
32426,32427,32428,32429,32430,32431,32432,32433,32434,32435,32436,32437,
32438,32439,32440,32441,32442,32443,32444,32445,32446,32447,32448,32449,
32450,32451,32452,32453,32454,32455,32456,32457,32458,32459,32460,32461,
32462,32463,32464,32465,32466,32467,32468,32469,32470,32471,32472,32473,
32474,32475,32476,32477,32478,32479,32480,32481,32482,32483,32484,32485,
32486,32487,32488,32489,32490,32491,32492,32493,32494,32495,32496,32497,
32498,32499,32500,32501,32502,32503,32504,32505,32506,32507,32508,32509,
32510,32511,32512,32513,32514,32515,32516,32517,32518,32519,32520,32521,
32522,32523,32524,32525,32526,32527,32528,32529,32530,32531,32532,32533,
32534,32535,32536,32537,32538,32539,32540,32541,32542,32543,32544,32545,
32546,32547,32548,32549,32550,32551,32552,32553,32554,32555,32556,32557,
32558,32559,32560,32561,32562,32563,32564,32565,32566,32567,32568,32569,
32570,32571,32572,32573,32574,32575,32576,32577,32578,32579,32580,32581,
32582,32583,32584,32585,32586,32587,32588,32589,32590,32591,32592,32593,
32594,32595,32596,32597,32598,32599,32600,32601,32602,32603,32604,32605,
32606,32607,32608,32609,32610,32611,32612,32613,32614,32615,32616,32617,
32618,32619,32620,32621,32622,32623,32624,32625,32626,32627,32628,32629,
32630,32631,32632,32633,32634,32635,32636,32637,32638,32639,32640,32641,
32642,32643,32644,32645,32646,32647,32648,32649,32650,32651,32652,32653,
32654,32655,32656,32657,32658,32659,32660,32661,32662,32663,32664,32665,
32666,32667,32668,32669,32670,32671,32672,32673,32674,32675,32676,32677,
32678,32679,32680,32681,32682,32683,32684,32685,32686,32687,32688,32689,
32690,32691,32692,32693,32694,32695,32696,32697,32698,32699,32700,32701,
32702,32703,32704,32705,32706,32707,32708,32709,32710,32711,32712,32713,
32714,32715,32716,32717,32718,32719,32720,32721,32722,32723,32724,32725,
32726,32727,32728,32729,32730,32731,32732,32733,32734,32735,32736,32737,
32738,32739,32740,32741,32742,32743,32744,32745,32746,32747,32748,32749,
32750,32751,32752,32753,32754,32755,32756,32757,32758,32759,32760,32761,
32762,32763,32764,32765,32766,32767,32768L,32769L,32770L,32771L,32772L,
32773L,32774L,32775L,32776L,32777L,32778L,32779L,32780L,32781L,32782L,
32783L,32784L,32785L,32786L,32787L,32788L,32789L,32790L,32791L,32792L,
32793L,32794L,32795L,32796L,32797L,32798L,32799L,32800L,32801L,32802L,
32803L,32804L,32805L,32806L,32807L,32808L,32809L,32810L,32811L,32812L,
32813L,32814L,32815L,32816L,32817L,32818L,32819L,32820L,32821L,32822L,
32823L,32824L,32825L,32826L,32827L,32828L,32829L,32830L,32831L,32832L,
32833L,32834L,32835L,32836L,32837L,32838L,32839L,32840L,32841L,32842L,
32843L,32844L,32845L,32846L,32847L,32848L,32849L,32850L,32851L,32852L,
32853L,32854L,32855L,32856L,32857L,32858L,32859L,32860L,32861L,32862L,
32863L,32864L,32865L,32866L,32867L,32868L,32869L,32870L,32871L,32872L,
32873L,32874L,32875L,32876L,32877L,32878L,32879L,32880L,32881L,32882L,
32883L,32884L,32885L,32886L,32887L,32888L,32889L,32890L,32891L,32892L,
32893L,32894L,32895L,32896L,32897L,32898L,32899L,32900L,32901L,32902L,
32903L,32904L,32905L,32906L,32907L,32908L,32909L,32910L,32911L,32912L,
32913L,32914L,32915L,32916L,32917L,32918L,32919L,32920L,32921L,32922L,
32923L,32924L,32925L,32926L,32927L,32928L,32929L,32930L,32931L,32932L,
32933L,32934L,32935L,32936L,32937L,32938L,32939L,32940L,32941L,32942L,
32943L,32944L,32945L,32946L,32947L,32948L,32949L,32950L,32951L,32952L,
32953L,32954L,32955L,32956L,32957L,32958L,32959L,32960L,32961L,32962L,
32963L,32964L,32965L,32966L,32967L,32968L,32969L,32970L,32971L,32972L,
32973L,32974L,32975L,32976L,32977L,32978L,32979L,32980L,32981L,32982L,
32983L,32984L,32985L,32986L,32987L,32988L,32989L,32990L,32991L,32992L,
32993L,32994L,32995L,32996L,32997L,32998L,32999L,33000L,33001L,33002L,
33003L,33004L,33005L,33006L,33007L,33008L,33009L,33010L,33011L,33012L,
33013L,33014L,33015L,33016L,33017L,33018L,33019L,33020L,33021L,33022L,
33023L,33024L,33025L,33026L,33027L,33028L,33029L,33030L,33031L,33032L,
33033L,33034L,33035L,33036L,33037L,33038L,33039L,33040L,33041L,33042L,
33043L,33044L,33045L,33046L,33047L,33048L,33049L,33050L,33051L,33052L,
33053L,33054L,33055L,33056L,33057L,33058L,33059L,33060L,33061L,33062L,
33063L,33064L,33065L,33066L,33067L,33068L,33069L,33070L,33071L,33072L,
33073L,33074L,33075L,33076L,33077L,33078L,33079L,33080L,33081L,33082L,
33083L,33084L,33085L,33086L,33087L,33088L,33089L,33090L,33091L,33092L,
33093L,33094L,33095L,33096L,33097L,33098L,33099L,33100L,33101L,33102L,
33103L,33104L,33105L,33106L,33107L,33108L,33109L,33110L,33111L,33112L,
33113L,33114L,33115L,33116L,33117L,33118L,33119L,33120L,33121L,33122L,
33123L,33124L,33125L,33126L,33127L,33128L,33129L,33130L,33131L,33132L,
33133L,33134L,33135L,33136L,33137L,33138L,33139L,33140L,33141L,33142L,
33143L,33144L,33145L,33146L,33147L,33148L,33149L,33150L,33151L,33152L,
33153L,33154L,33155L,33156L,33157L,33158L,33159L,33160L,33161L,33162L,
33163L,33164L,33165L,33166L,33167L,33168L,33169L,33170L,33171L,33172L,
33173L,33174L,33175L,33176L,33177L,33178L,33179L,33180L,33181L,33182L,
33183L,33184L,33185L,33186L,33187L,33188L,33189L,33190L,33191L,33192L,
33193L,33194L,33195L,33196L,33197L,33198L,33199L,33200L,33201L,33202L,
33203L,33204L,33205L,33206L,33207L,33208L,33209L,33210L,33211L,33212L,
33213L,33214L,33215L,33216L,33217L,33218L,33219L,33220L,33221L,33222L,
33223L,33224L,33225L,33226L,33227L,33228L,33229L,33230L,33231L,33232L,
33233L,33234L,33235L,33236L,33237L,33238L,33239L,33240L,33241L,33242L,
33243L,33244L,33245L,33246L,33247L,33248L,33249L,33250L,33251L,33252L,
33253L,33254L,33255L,33256L,33257L,33258L,33259L,33260L,33261L,33262L,
33263L,33264L,33265L,33266L,33267L,33268L,33269L,33270L,33271L,33272L,
33273L,33274L,33275L,33276L,33277L,33278L,33279L,33280L,33281L,33282L,
33283L,33284L,33285L,33286L,33287L,33288L,33289L,33290L,33291L,33292L,
33293L,33294L,33295L,33296L,33297L,33298L,33299L,33300L,33301L,33302L,
33303L,33304L,33305L,33306L,33307L,33308L,33309L,33310L,33311L,33312L,
33313L,33314L,33315L,33316L,33317L,33318L,33319L,33320L,33321L,33322L,
33323L,33324L,33325L,33326L,33327L,33328L,33329L,33330L,33331L,33332L,
33333L,33334L,33335L,33336L,33337L,33338L,33339L,33340L,33341L,33342L,
33343L,33344L,33345L,33346L,33347L,33348L,33349L,33350L,33351L,33352L,
33353L,33354L,33355L,33356L,33357L,33358L,33359L,33360L,33361L,33362L,
33363L,33364L,33365L,33366L,33367L,33368L,33369L,33370L,33371L,33372L,
33373L,33374L,33375L,33376L,33377L,33378L,33379L,33380L,33381L,33382L,
33383L,33384L,33385L,33386L,33387L,33388L,33389L,33390L,33391L,33392L,
33393L,33394L,33395L,33396L,33397L,33398L,33399L,33400L,33401L,33402L,
33403L,33404L,33405L,33406L,33407L,33408L,33409L,33410L,33411L,33412L,
33413L,33414L,33415L,33416L,33417L,33418L,33419L,33420L,33421L,33422L,
33423L,33424L,33425L,33426L,33427L,33428L,33429L,33430L,33431L,33432L,
33433L,33434L,33435L,33436L,33437L,33438L,33439L,33440L,33441L,33442L,
33443L,33444L,33445L,33446L,33447L,33448L,33449L,33450L,33451L,33452L,
33453L,33454L,33455L,33456L,33457L,33458L,33459L,33460L,33461L,33462L,
33463L,33464L,33465L,33466L,33467L,33468L,33469L,33470L,33471L,33472L,
33473L,33474L,33475L,33476L,33477L,33478L,33479L,33480L,33481L,33482L,
33483L,33484L,33485L,33486L,33487L,33488L,33489L,33490L,33491L,33492L,
33493L,33494L,33495L,33496L,33497L,33498L,33499L,33500L,33501L,33502L,
33503L,33504L,33505L,33506L,33507L,33508L,33509L,33510L,33511L,33512L,
33513L,33514L,33515L,33516L,33517L,33518L,33519L,33520L,33521L,33522L,
33523L,33524L,33525L,33526L,33527L,33528L,33529L,33530L,33531L,33532L,
33533L,33534L,33535L,33536L,33537L,33538L,33539L,33540L,33541L,33542L,
33543L,33544L,33545L,33546L,33547L,33548L,33549L,33550L,33551L,33552L,
33553L,33554L,33555L,33556L,33557L,33558L,33559L,33560L,33561L,33562L,
33563L,33564L,33565L,33566L,33567L,33568L,33569L,33570L,33571L,33572L,
33573L,33574L,33575L,33576L,33577L,33578L,33579L,33580L,33581L,33582L,
33583L,33584L,33585L,33586L,33587L,33588L,33589L,33590L,33591L,33592L,
33593L,33594L,33595L,33596L,33597L,33598L,33599L,33600L,33601L,33602L,
33603L,33604L,33605L,33606L,33607L,33608L,33609L,33610L,33611L,33612L,
33613L,33614L,33615L,33616L,33617L,33618L,33619L,33620L,33621L,33622L,
33623L,33624L,33625L,33626L,33627L,33628L,33629L,33630L,33631L,33632L,
33633L,33634L,33635L,33636L,33637L,33638L,33639L,33640L,33641L,33642L,
33643L,33644L,33645L,33646L,33647L,33648L,33649L,33650L,33651L,33652L,
33653L,33654L,33655L,33656L,33657L,33658L,33659L,33660L,33661L,33662L,
33663L,33664L,33665L,33666L,33667L,33668L,33669L,33670L,33671L,33672L,
33673L,33674L,33675L,33676L,33677L,33678L,33679L,33680L,33681L,33682L,
33683L,33684L,33685L,33686L,33687L,33688L,33689L,33690L,33691L,33692L,
33693L,33694L,33695L,33696L,33697L,33698L,33699L,33700L,33701L,33702L,
33703L,33704L,33705L,33706L,33707L,33708L,33709L,33710L,33711L,33712L,
33713L,33714L,33715L,33716L,33717L,33718L,33719L,33720L,33721L,33722L,
33723L,33724L,33725L,33726L,33727L,33728L,33729L,33730L,33731L,33732L,
33733L,33734L,33735L,33736L,33737L,33738L,33739L,33740L,33741L,33742L,
33743L,33744L,33745L,33746L,33747L,33748L,33749L,33750L,33751L,33752L,
33753L,33754L,33755L,33756L,33757L,33758L,33759L,33760L,33761L,33762L,
33763L,33764L,33765L,33766L,33767L,33768L,33769L,33770L,33771L,33772L,
33773L,33774L,33775L,33776L,33777L,33778L,33779L,33780L,33781L,33782L,
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35393L,35394L,35395L,35396L,35397L,35398L,35399L,35400L,35401L,35402L,
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35493L,35494L,35495L,35496L,35497L,35498L,35499L,35500L,35501L,35502L,
35503L,35504L,35505L,35506L,35507L,35508L,35509L,35510L,35511L,35512L,
35513L,35514L,35515L,35516L,35517L,35518L,35519L,35520L,35521L,35522L,
35523L,35524L,35525L,35526L,35527L,35528L,35529L,35530L,35531L,35532L,
35533L,35534L,35535L,35536L,35537L,35538L,35539L,35540L,35541L,35542L,
35543L,35544L,35545L,35546L,35547L,35548L,35549L,35550L,35551L,35552L,
35553L,35554L,35555L,35556L,35557L,35558L,35559L,35560L,35561L,35562L,
35563L,35564L,35565L,35566L,35567L,35568L,35569L,35570L,35571L,35572L,
35573L,35574L,35575L,35576L,35577L,35578L,35579L,35580L,35581L,35582L,
35583L,35584L,35585L,35586L,35587L,35588L,35589L,35590L,35591L,35592L,
35593L,35594L,35595L,35596L,35597L,35598L,35599L,35600L,35601L,35602L,
35603L,35604L,35605L,35606L,35607L,35608L,35609L,35610L,35611L,35612L,
35613L,35614L,35615L,35616L,35617L,35618L,35619L,35620L,35621L,35622L,
35623L,35624L,35625L,35626L,35627L,35628L,35629L,35630L,35631L,35632L,
35633L,35634L,35635L,35636L,35637L,35638L,35639L,35640L,35641L,35642L,
35643L,35644L,35645L,35646L,35647L,35648L,35649L,35650L,35651L,35652L,
35653L,35654L,35655L,35656L,35657L,35658L,35659L,35660L,35661L,35662L,
35663L,35664L,35665L,35666L,35667L,35668L,35669L,35670L,35671L,35672L,
35673L,35674L,35675L,35676L,35677L,35678L,35679L,35680L,35681L,35682L,
35683L,35684L,35685L,35686L,35687L,35688L,35689L,35690L,35691L,35692L,
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35703L,35704L,35705L,35706L,35707L,35708L,35709L,35710L,35711L,35712L,
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37603L,37604L,37605L,37606L,37607L,37608L,37609L,37610L,37611L,37612L,
37613L,37614L,37615L,37616L,37617L,37618L,37619L,37620L,37621L,37622L,
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37633L,37634L,37635L,37636L,37637L,37638L,37639L,37640L,37641L,37642L,
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38303L,38304L,38305L,38306L,38307L,38308L,38309L,38310L,38311L,38312L,
38313L,38314L,38315L,38316L,38317L,38318L,38319L,38320L,38321L,38322L,
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38393L,38394L,38395L,38396L,38397L,38398L,38399L,38400L,38401L,38402L,
38403L,38404L,38405L,38406L,38407L,38408L,38409L,38410L,38411L,38412L,
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38513L,38514L,38515L,38516L,38517L,38518L,38519L,38520L,38521L,38522L,
38523L,38524L,38525L,38526L,38527L,38528L,38529L,38530L,38531L,38532L,
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38613L,38614L,38615L,38616L,38617L,38618L,38619L,38620L,38621L,38622L,
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39143L,39144L,39145L,39146L,39147L,39148L,39149L,39150L,39151L,39152L,
39153L,39154L,39155L,39156L,39157L,39158L,39159L,39160L,39161L,39162L,
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39203L,39204L,39205L,39206L,39207L,39208L,39209L,39210L,39211L,39212L,
39213L,39214L,39215L,39216L,39217L,39218L,39219L,39220L,39221L,39222L,
39223L,39224L,39225L,39226L,39227L,39228L,39229L,39230L,39231L,39232L,
39233L,39234L,39235L,39236L,39237L,39238L,39239L,39240L,39241L,39242L,
39243L,39244L,39245L,39246L,39247L,39248L,39249L,39250L,39251L,39252L,
39253L,39254L,39255L,39256L,39257L,39258L,39259L,39260L,39261L,39262L,
39263L,39264L,39265L,39266L,39267L,39268L,39269L,39270L,39271L,39272L,
39273L,39274L,39275L,39276L,39277L,39278L,39279L,39280L,39281L,39282L,
39283L,39284L,39285L,39286L,39287L,39288L,39289L,39290L,39291L,39292L,
39293L,39294L,39295L,39296L,39297L,39298L,39299L,39300L,39301L,39302L,
39303L,39304L,39305L,39306L,39307L,39308L,39309L,39310L,39311L,39312L,
39313L,39314L,39315L,39316L,39317L,39318L,39319L,39320L,39321L,39322L,
39323L,39324L,39325L,39326L,39327L,39328L,39329L,39330L,39331L,39332L,
39333L,39334L,39335L,39336L,39337L,39338L,39339L,39340L,39341L,39342L,
39343L,39344L,39345L,39346L,39347L,39348L,39349L,39350L,39351L,39352L,
39353L,39354L,39355L,39356L,39357L,39358L,39359L,39360L,39361L,39362L,
39363L,39364L,39365L,39366L,39367L,39368L,39369L,39370L,39371L,39372L,
39373L,39374L,39375L,39376L,39377L,39378L,39379L,39380L,39381L,39382L,
39383L,39384L,39385L,39386L,39387L,39388L,39389L,39390L,39391L,39392L,
39393L,39394L,39395L,39396L,39397L,39398L,39399L,39400L,39401L,39402L,
39403L,39404L,39405L,39406L,39407L,39408L,39409L,39410L,39411L,39412L,
39413L,39414L,39415L,39416L,39417L,39418L,39419L,39420L,39421L,39422L,
39423L,39424L,39425L,39426L,39427L,39428L,39429L,39430L,39431L,39432L,
39433L,39434L,39435L,39436L,39437L,39438L,39439L,39440L,39441L,39442L,
39443L,39444L,39445L,39446L,39447L,39448L,39449L,39450L,39451L,39452L,
39453L,39454L,39455L,39456L,39457L,39458L,39459L,39460L,39461L,39462L,
39463L,39464L,39465L,39466L,39467L,39468L,39469L,39470L,39471L,39472L,
39473L,39474L,39475L,39476L,39477L,39478L,39479L,39480L,39481L,39482L,
39483L,39484L,39485L,39486L,39487L,39488L,39489L,39490L,39491L,39492L,
39493L,39494L,39495L,39496L,39497L,39498L,39499L,39500L,39501L,39502L,
39503L,39504L,39505L,39506L,39507L,39508L,39509L,39510L,39511L,39512L,
39513L,39514L,39515L,39516L,39517L,39518L,39519L,39520L,39521L,39522L,
39523L,39524L,39525L,39526L,39527L,39528L,39529L,39530L,39531L,39532L,
39533L,39534L,39535L,39536L,39537L,39538L,39539L,39540L,39541L,39542L,
39543L,39544L,39545L,39546L,39547L,39548L,39549L,39550L,39551L,39552L,
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39563L,39564L,39565L,39566L,39567L,39568L,39569L,39570L,39571L,39572L,
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41483L,41484L,41485L,41486L,41487L,41488L,41489L,41490L,41491L,41492L,
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42403L,42404L,42405L,42406L,42407L,42408L,42409L,42410L,42411L,42412L,
42413L,42414L,42415L,42416L,42417L,42418L,42419L,42420L,42421L,42422L,
42423L,42424L,42425L,42426L,42427L,42428L,42429L,42430L,42431L,42432L,
42433L,42434L,42435L,42436L,42437L,42438L,42439L,42440L,42441L,42442L,
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42493L,42494L,42495L,42496L,42497L,42498L,42499L,42500L,42501L,42502L,
42503L,42504L,42505L,42506L,42507L,42508L,42509L,42510L,42511L,42512L,
42513L,42514L,42515L,42516L,42517L,42518L,42519L,42520L,42521L,42522L,
42523L,42524L,42525L,42526L,42527L,42528L,42529L,42530L,42531L,42532L,
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42543L,42544L,42545L,42546L,42547L,42548L,42549L,42550L,42551L,42552L,
42553L,42554L,42555L,42556L,42557L,42558L,42559L,42560L,42560L,42562L,
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42703L,42704L,42705L,42706L,42707L,42708L,42709L,42710L,42711L,42712L,
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42822L,42824L,42824L,42826L,42826L,42828L,42828L,42830L,42830L,42832L,
42832L,42834L,42834L,42836L,42836L,42838L,42838L,42840L,42840L,42842L,
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42873L,42873L,42875L,42875L,42877L,42878L,42878L,42880L,42880L,42882L,
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42893L,42894L,42895L,42896L,42896L,42898L,42899L,42900L,42901L,42902L,
42903L,42904L,42905L,42906L,42907L,42908L,42909L,42910L,42911L,42912L,
42912L,42914L,42914L,42916L,42916L,42918L,42918L,42920L,42920L,42922L,
42923L,42924L,42925L,42926L,42927L,42928L,42929L,42930L,42931L,42932L,
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42973L,42974L,42975L,42976L,42977L,42978L,42979L,42980L,42981L,42982L,
42983L,42984L,42985L,42986L,42987L,42988L,42989L,42990L,42991L,42992L,
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43023L,43024L,43025L,43026L,43027L,43028L,43029L,43030L,43031L,43032L,
43033L,43034L,43035L,43036L,43037L,43038L,43039L,43040L,43041L,43042L,
43043L,43044L,43045L,43046L,43047L,43048L,43049L,43050L,43051L,43052L,
43053L,43054L,43055L,43056L,43057L,43058L,43059L,43060L,43061L,43062L,
43063L,43064L,43065L,43066L,43067L,43068L,43069L,43070L,43071L,43072L,
43073L,43074L,43075L,43076L,43077L,43078L,43079L,43080L,43081L,43082L,
43083L,43084L,43085L,43086L,43087L,43088L,43089L,43090L,43091L,43092L,
43093L,43094L,43095L,43096L,43097L,43098L,43099L,43100L,43101L,43102L,
43103L,43104L,43105L,43106L,43107L,43108L,43109L,43110L,43111L,43112L,
43113L,43114L,43115L,43116L,43117L,43118L,43119L,43120L,43121L,43122L,
43123L,43124L,43125L,43126L,43127L,43128L,43129L,43130L,43131L,43132L,
43133L,43134L,43135L,43136L,43137L,43138L,43139L,43140L,43141L,43142L,
43143L,43144L,43145L,43146L,43147L,43148L,43149L,43150L,43151L,43152L,
43153L,43154L,43155L,43156L,43157L,43158L,43159L,43160L,43161L,43162L,
43163L,43164L,43165L,43166L,43167L,43168L,43169L,43170L,43171L,43172L,
43173L,43174L,43175L,43176L,43177L,43178L,43179L,43180L,43181L,43182L,
43183L,43184L,43185L,43186L,43187L,43188L,43189L,43190L,43191L,43192L,
43193L,43194L,43195L,43196L,43197L,43198L,43199L,43200L,43201L,43202L,
43203L,43204L,43205L,43206L,43207L,43208L,43209L,43210L,43211L,43212L,
43213L,43214L,43215L,43216L,43217L,43218L,43219L,43220L,43221L,43222L,
43223L,43224L,43225L,43226L,43227L,43228L,43229L,43230L,43231L,43232L,
43233L,43234L,43235L,43236L,43237L,43238L,43239L,43240L,43241L,43242L,
43243L,43244L,43245L,43246L,43247L,43248L,43249L,43250L,43251L,43252L,
43253L,43254L,43255L,43256L,43257L,43258L,43259L,43260L,43261L,43262L,
43263L,43264L,43265L,43266L,43267L,43268L,43269L,43270L,43271L,43272L,
43273L,43274L,43275L,43276L,43277L,43278L,43279L,43280L,43281L,43282L,
43283L,43284L,43285L,43286L,43287L,43288L,43289L,43290L,43291L,43292L,
43293L,43294L,43295L,43296L,43297L,43298L,43299L,43300L,43301L,43302L,
43303L,43304L,43305L,43306L,43307L,43308L,43309L,43310L,43311L,43312L,
43313L,43314L,43315L,43316L,43317L,43318L,43319L,43320L,43321L,43322L,
43323L,43324L,43325L,43326L,43327L,43328L,43329L,43330L,43331L,43332L,
43333L,43334L,43335L,43336L,43337L,43338L,43339L,43340L,43341L,43342L,
43343L,43344L,43345L,43346L,43347L,43348L,43349L,43350L,43351L,43352L,
43353L,43354L,43355L,43356L,43357L,43358L,43359L,43360L,43361L,43362L,
43363L,43364L,43365L,43366L,43367L,43368L,43369L,43370L,43371L,43372L,
43373L,43374L,43375L,43376L,43377L,43378L,43379L,43380L,43381L,43382L,
43383L,43384L,43385L,43386L,43387L,43388L,43389L,43390L,43391L,43392L,
43393L,43394L,43395L,43396L,43397L,43398L,43399L,43400L,43401L,43402L,
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43413L,43414L,43415L,43416L,43417L,43418L,43419L,43420L,43421L,43422L,
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46973L,46974L,46975L,46976L,46977L,46978L,46979L,46980L,46981L,46982L,
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47073L,47074L,47075L,47076L,47077L,47078L,47079L,47080L,47081L,47082L,
47083L,47084L,47085L,47086L,47087L,47088L,47089L,47090L,47091L,47092L,
47093L,47094L,47095L,47096L,47097L,47098L,47099L,47100L,47101L,47102L,
47103L,47104L,47105L,47106L,47107L,47108L,47109L,47110L,47111L,47112L,
47113L,47114L,47115L,47116L,47117L,47118L,47119L,47120L,47121L,47122L,
47123L,47124L,47125L,47126L,47127L,47128L,47129L,47130L,47131L,47132L,
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47143L,47144L,47145L,47146L,47147L,47148L,47149L,47150L,47151L,47152L,
47153L,47154L,47155L,47156L,47157L,47158L,47159L,47160L,47161L,47162L,
47163L,47164L,47165L,47166L,47167L,47168L,47169L,47170L,47171L,47172L,
47173L,47174L,47175L,47176L,47177L,47178L,47179L,47180L,47181L,47182L,
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47193L,47194L,47195L,47196L,47197L,47198L,47199L,47200L,47201L,47202L,
47203L,47204L,47205L,47206L,47207L,47208L,47209L,47210L,47211L,47212L,
47213L,47214L,47215L,47216L,47217L,47218L,47219L,47220L,47221L,47222L,
47223L,47224L,47225L,47226L,47227L,47228L,47229L,47230L,47231L,47232L,
47233L,47234L,47235L,47236L,47237L,47238L,47239L,47240L,47241L,47242L,
47243L,47244L,47245L,47246L,47247L,47248L,47249L,47250L,47251L,47252L,
47253L,47254L,47255L,47256L,47257L,47258L,47259L,47260L,47261L,47262L,
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51703L,51704L,51705L,51706L,51707L,51708L,51709L,51710L,51711L,51712L,
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51763L,51764L,51765L,51766L,51767L,51768L,51769L,51770L,51771L,51772L,
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51803L,51804L,51805L,51806L,51807L,51808L,51809L,51810L,51811L,51812L,
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51973L,51974L,51975L,51976L,51977L,51978L,51979L,51980L,51981L,51982L,
51983L,51984L,51985L,51986L,51987L,51988L,51989L,51990L,51991L,51992L,
51993L,51994L,51995L,51996L,51997L,51998L,51999L,52000L,52001L,52002L,
52003L,52004L,52005L,52006L,52007L,52008L,52009L,52010L,52011L,52012L,
52013L,52014L,52015L,52016L,52017L,52018L,52019L,52020L,52021L,52022L,
52023L,52024L,52025L,52026L,52027L,52028L,52029L,52030L,52031L,52032L,
52033L,52034L,52035L,52036L,52037L,52038L,52039L,52040L,52041L,52042L,
52043L,52044L,52045L,52046L,52047L,52048L,52049L,52050L,52051L,52052L,
52053L,52054L,52055L,52056L,52057L,52058L,52059L,52060L,52061L,52062L,
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52073L,52074L,52075L,52076L,52077L,52078L,52079L,52080L,52081L,52082L,
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52313L,52314L,52315L,52316L,52317L,52318L,52319L,52320L,52321L,52322L,
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52393L,52394L,52395L,52396L,52397L,52398L,52399L,52400L,52401L,52402L,
52403L,52404L,52405L,52406L,52407L,52408L,52409L,52410L,52411L,52412L,
52413L,52414L,52415L,52416L,52417L,52418L,52419L,52420L,52421L,52422L,
52423L,52424L,52425L,52426L,52427L,52428L,52429L,52430L,52431L,52432L,
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52453L,52454L,52455L,52456L,52457L,52458L,52459L,52460L,52461L,52462L,
52463L,52464L,52465L,52466L,52467L,52468L,52469L,52470L,52471L,52472L,
52473L,52474L,52475L,52476L,52477L,52478L,52479L,52480L,52481L,52482L,
52483L,52484L,52485L,52486L,52487L,52488L,52489L,52490L,52491L,52492L,
52493L,52494L,52495L,52496L,52497L,52498L,52499L,52500L,52501L,52502L,
52503L,52504L,52505L,52506L,52507L,52508L,52509L,52510L,52511L,52512L,
52513L,52514L,52515L,52516L,52517L,52518L,52519L,52520L,52521L,52522L,
52523L,52524L,52525L,52526L,52527L,52528L,52529L,52530L,52531L,52532L,
52533L,52534L,52535L,52536L,52537L,52538L,52539L,52540L,52541L,52542L,
52543L,52544L,52545L,52546L,52547L,52548L,52549L,52550L,52551L,52552L,
52553L,52554L,52555L,52556L,52557L,52558L,52559L,52560L,52561L,52562L,
52563L,52564L,52565L,52566L,52567L,52568L,52569L,52570L,52571L,52572L,
52573L,52574L,52575L,52576L,52577L,52578L,52579L,52580L,52581L,52582L,
52583L,52584L,52585L,52586L,52587L,52588L,52589L,52590L,52591L,52592L,
52593L,52594L,52595L,52596L,52597L,52598L,52599L,52600L,52601L,52602L,
52603L,52604L,52605L,52606L,52607L,52608L,52609L,52610L,52611L,52612L,
52613L,52614L,52615L,52616L,52617L,52618L,52619L,52620L,52621L,52622L,
52623L,52624L,52625L,52626L,52627L,52628L,52629L,52630L,52631L,52632L,
52633L,52634L,52635L,52636L,52637L,52638L,52639L,52640L,52641L,52642L,
52643L,52644L,52645L,52646L,52647L,52648L,52649L,52650L,52651L,52652L,
52653L,52654L,52655L,52656L,52657L,52658L,52659L,52660L,52661L,52662L,
52663L,52664L,52665L,52666L,52667L,52668L,52669L,52670L,52671L,52672L,
52673L,52674L,52675L,52676L,52677L,52678L,52679L,52680L,52681L,52682L,
52683L,52684L,52685L,52686L,52687L,52688L,52689L,52690L,52691L,52692L,
52693L,52694L,52695L,52696L,52697L,52698L,52699L,52700L,52701L,52702L,
52703L,52704L,52705L,52706L,52707L,52708L,52709L,52710L,52711L,52712L,
52713L,52714L,52715L,52716L,52717L,52718L,52719L,52720L,52721L,52722L,
52723L,52724L,52725L,52726L,52727L,52728L,52729L,52730L,52731L,52732L,
52733L,52734L,52735L,52736L,52737L,52738L,52739L,52740L,52741L,52742L,
52743L,52744L,52745L,52746L,52747L,52748L,52749L,52750L,52751L,52752L,
52753L,52754L,52755L,52756L,52757L,52758L,52759L,52760L,52761L,52762L,
52763L,52764L,52765L,52766L,52767L,52768L,52769L,52770L,52771L,52772L,
52773L,52774L,52775L,52776L,52777L,52778L,52779L,52780L,52781L,52782L,
52783L,52784L,52785L,52786L,52787L,52788L,52789L,52790L,52791L,52792L,
52793L,52794L,52795L,52796L,52797L,52798L,52799L,52800L,52801L,52802L,
52803L,52804L,52805L,52806L,52807L,52808L,52809L,52810L,52811L,52812L,
52813L,52814L,52815L,52816L,52817L,52818L,52819L,52820L,52821L,52822L,
52823L,52824L,52825L,52826L,52827L,52828L,52829L,52830L,52831L,52832L,
52833L,52834L,52835L,52836L,52837L,52838L,52839L,52840L,52841L,52842L,
52843L,52844L,52845L,52846L,52847L,52848L,52849L,52850L,52851L,52852L,
52853L,52854L,52855L,52856L,52857L,52858L,52859L,52860L,52861L,52862L,
52863L,52864L,52865L,52866L,52867L,52868L,52869L,52870L,52871L,52872L,
52873L,52874L,52875L,52876L,52877L,52878L,52879L,52880L,52881L,52882L,
52883L,52884L,52885L,52886L,52887L,52888L,52889L,52890L,52891L,52892L,
52893L,52894L,52895L,52896L,52897L,52898L,52899L,52900L,52901L,52902L,
52903L,52904L,52905L,52906L,52907L,52908L,52909L,52910L,52911L,52912L,
52913L,52914L,52915L,52916L,52917L,52918L,52919L,52920L,52921L,52922L,
52923L,52924L,52925L,52926L,52927L,52928L,52929L,52930L,52931L,52932L,
52933L,52934L,52935L,52936L,52937L,52938L,52939L,52940L,52941L,52942L,
52943L,52944L,52945L,52946L,52947L,52948L,52949L,52950L,52951L,52952L,
52953L,52954L,52955L,52956L,52957L,52958L,52959L,52960L,52961L,52962L,
52963L,52964L,52965L,52966L,52967L,52968L,52969L,52970L,52971L,52972L,
52973L,52974L,52975L,52976L,52977L,52978L,52979L,52980L,52981L,52982L,
52983L,52984L,52985L,52986L,52987L,52988L,52989L,52990L,52991L,52992L,
52993L,52994L,52995L,52996L,52997L,52998L,52999L,53000L,53001L,53002L,
53003L,53004L,53005L,53006L,53007L,53008L,53009L,53010L,53011L,53012L,
53013L,53014L,53015L,53016L,53017L,53018L,53019L,53020L,53021L,53022L,
53023L,53024L,53025L,53026L,53027L,53028L,53029L,53030L,53031L,53032L,
53033L,53034L,53035L,53036L,53037L,53038L,53039L,53040L,53041L,53042L,
53043L,53044L,53045L,53046L,53047L,53048L,53049L,53050L,53051L,53052L,
53053L,53054L,53055L,53056L,53057L,53058L,53059L,53060L,53061L,53062L,
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54623L,54624L,54625L,54626L,54627L,54628L,54629L,54630L,54631L,54632L,
54633L,54634L,54635L,54636L,54637L,54638L,54639L,54640L,54641L,54642L,
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54713L,54714L,54715L,54716L,54717L,54718L,54719L,54720L,54721L,54722L,
54723L,54724L,54725L,54726L,54727L,54728L,54729L,54730L,54731L,54732L,
54733L,54734L,54735L,54736L,54737L,54738L,54739L,54740L,54741L,54742L,
54743L,54744L,54745L,54746L,54747L,54748L,54749L,54750L,54751L,54752L,
54753L,54754L,54755L,54756L,54757L,54758L,54759L,54760L,54761L,54762L,
54763L,54764L,54765L,54766L,54767L,54768L,54769L,54770L,54771L,54772L,
54773L,54774L,54775L,54776L,54777L,54778L,54779L,54780L,54781L,54782L,
54783L,54784L,54785L,54786L,54787L,54788L,54789L,54790L,54791L,54792L,
54793L,54794L,54795L,54796L,54797L,54798L,54799L,54800L,54801L,54802L,
54803L,54804L,54805L,54806L,54807L,54808L,54809L,54810L,54811L,54812L,
54813L,54814L,54815L,54816L,54817L,54818L,54819L,54820L,54821L,54822L,
54823L,54824L,54825L,54826L,54827L,54828L,54829L,54830L,54831L,54832L,
54833L,54834L,54835L,54836L,54837L,54838L,54839L,54840L,54841L,54842L,
54843L,54844L,54845L,54846L,54847L,54848L,54849L,54850L,54851L,54852L,
54853L,54854L,54855L,54856L,54857L,54858L,54859L,54860L,54861L,54862L,
54863L,54864L,54865L,54866L,54867L,54868L,54869L,54870L,54871L,54872L,
54873L,54874L,54875L,54876L,54877L,54878L,54879L,54880L,54881L,54882L,
54883L,54884L,54885L,54886L,54887L,54888L,54889L,54890L,54891L,54892L,
54893L,54894L,54895L,54896L,54897L,54898L,54899L,54900L,54901L,54902L,
54903L,54904L,54905L,54906L,54907L,54908L,54909L,54910L,54911L,54912L,
54913L,54914L,54915L,54916L,54917L,54918L,54919L,54920L,54921L,54922L,
54923L,54924L,54925L,54926L,54927L,54928L,54929L,54930L,54931L,54932L,
54933L,54934L,54935L,54936L,54937L,54938L,54939L,54940L,54941L,54942L,
54943L,54944L,54945L,54946L,54947L,54948L,54949L,54950L,54951L,54952L,
54953L,54954L,54955L,54956L,54957L,54958L,54959L,54960L,54961L,54962L,
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54973L,54974L,54975L,54976L,54977L,54978L,54979L,54980L,54981L,54982L,
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56783L,56784L,56785L,56786L,56787L,56788L,56789L,56790L,56791L,56792L,
56793L,56794L,56795L,56796L,56797L,56798L,56799L,56800L,56801L,56802L,
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56813L,56814L,56815L,56816L,56817L,56818L,56819L,56820L,56821L,56822L,
56823L,56824L,56825L,56826L,56827L,56828L,56829L,56830L,56831L,56832L,
56833L,56834L,56835L,56836L,56837L,56838L,56839L,56840L,56841L,56842L,
56843L,56844L,56845L,56846L,56847L,56848L,56849L,56850L,56851L,56852L,
56853L,56854L,56855L,56856L,56857L,56858L,56859L,56860L,56861L,56862L,
56863L,56864L,56865L,56866L,56867L,56868L,56869L,56870L,56871L,56872L,
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58583L,58584L,58585L,58586L,58587L,58588L,58589L,58590L,58591L,58592L,
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58603L,58604L,58605L,58606L,58607L,58608L,58609L,58610L,58611L,58612L,
58613L,58614L,58615L,58616L,58617L,58618L,58619L,58620L,58621L,58622L,
58623L,58624L,58625L,58626L,58627L,58628L,58629L,58630L,58631L,58632L,
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58703L,58704L,58705L,58706L,58707L,58708L,58709L,58710L,58711L,58712L,
58713L,58714L,58715L,58716L,58717L,58718L,58719L,58720L,58721L,58722L,
58723L,58724L,58725L,58726L,58727L,58728L,58729L,58730L,58731L,58732L,
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64463L,64464L,64465L,64466L,64467L,64468L,64469L,64470L,64471L,64472L,
64473L,64474L,64475L,64476L,64477L,64478L,64479L,64480L,64481L,64482L,
64483L,64484L,64485L,64486L,64487L,64488L,64489L,64490L,64491L,64492L,
64493L,64494L,64495L,64496L,64497L,64498L,64499L,64500L,64501L,64502L,
64503L,64504L,64505L,64506L,64507L,64508L,64509L,64510L,64511L,64512L,
64513L,64514L,64515L,64516L,64517L,64518L,64519L,64520L,64521L,64522L,
64523L,64524L,64525L,64526L,64527L,64528L,64529L,64530L,64531L,64532L,
64533L,64534L,64535L,64536L,64537L,64538L,64539L,64540L,64541L,64542L,
64543L,64544L,64545L,64546L,64547L,64548L,64549L,64550L,64551L,64552L,
64553L,64554L,64555L,64556L,64557L,64558L,64559L,64560L,64561L,64562L,
64563L,64564L,64565L,64566L,64567L,64568L,64569L,64570L,64571L,64572L,
64573L,64574L,64575L,64576L,64577L,64578L,64579L,64580L,64581L,64582L,
64583L,64584L,64585L,64586L,64587L,64588L,64589L,64590L,64591L,64592L,
64593L,64594L,64595L,64596L,64597L,64598L,64599L,64600L,64601L,64602L,
64603L,64604L,64605L,64606L,64607L,64608L,64609L,64610L,64611L,64612L,
64613L,64614L,64615L,64616L,64617L,64618L,64619L,64620L,64621L,64622L,
64623L,64624L,64625L,64626L,64627L,64628L,64629L,64630L,64631L,64632L,
64633L,64634L,64635L,64636L,64637L,64638L,64639L,64640L,64641L,64642L,
64643L,64644L,64645L,64646L,64647L,64648L,64649L,64650L,64651L,64652L,
64653L,64654L,64655L,64656L,64657L,64658L,64659L,64660L,64661L,64662L,
64663L,64664L,64665L,64666L,64667L,64668L,64669L,64670L,64671L,64672L,
64673L,64674L,64675L,64676L,64677L,64678L,64679L,64680L,64681L,64682L,
64683L,64684L,64685L,64686L,64687L,64688L,64689L,64690L,64691L,64692L,
64693L,64694L,64695L,64696L,64697L,64698L,64699L,64700L,64701L,64702L,
64703L,64704L,64705L,64706L,64707L,64708L,64709L,64710L,64711L,64712L,
64713L,64714L,64715L,64716L,64717L,64718L,64719L,64720L,64721L,64722L,
64723L,64724L,64725L,64726L,64727L,64728L,64729L,64730L,64731L,64732L,
64733L,64734L,64735L,64736L,64737L,64738L,64739L,64740L,64741L,64742L,
64743L,64744L,64745L,64746L,64747L,64748L,64749L,64750L,64751L,64752L,
64753L,64754L,64755L,64756L,64757L,64758L,64759L,64760L,64761L,64762L,
64763L,64764L,64765L,64766L,64767L,64768L,64769L,64770L,64771L,64772L,
64773L,64774L,64775L,64776L,64777L,64778L,64779L,64780L,64781L,64782L,
64783L,64784L,64785L,64786L,64787L,64788L,64789L,64790L,64791L,64792L,
64793L,64794L,64795L,64796L,64797L,64798L,64799L,64800L,64801L,64802L,
64803L,64804L,64805L,64806L,64807L,64808L,64809L,64810L,64811L,64812L,
64813L,64814L,64815L,64816L,64817L,64818L,64819L,64820L,64821L,64822L,
64823L,64824L,64825L,64826L,64827L,64828L,64829L,64830L,64831L,64832L,
64833L,64834L,64835L,64836L,64837L,64838L,64839L,64840L,64841L,64842L,
64843L,64844L,64845L,64846L,64847L,64848L,64849L,64850L,64851L,64852L,
64853L,64854L,64855L,64856L,64857L,64858L,64859L,64860L,64861L,64862L,
64863L,64864L,64865L,64866L,64867L,64868L,64869L,64870L,64871L,64872L,
64873L,64874L,64875L,64876L,64877L,64878L,64879L,64880L,64881L,64882L,
64883L,64884L,64885L,64886L,64887L,64888L,64889L,64890L,64891L,64892L,
64893L,64894L,64895L,64896L,64897L,64898L,64899L,64900L,64901L,64902L,
64903L,64904L,64905L,64906L,64907L,64908L,64909L,64910L,64911L,64912L,
64913L,64914L,64915L,64916L,64917L,64918L,64919L,64920L,64921L,64922L,
64923L,64924L,64925L,64926L,64927L,64928L,64929L,64930L,64931L,64932L,
64933L,64934L,64935L,64936L,64937L,64938L,64939L,64940L,64941L,64942L,
64943L,64944L,64945L,64946L,64947L,64948L,64949L,64950L,64951L,64952L,
64953L,64954L,64955L,64956L,64957L,64958L,64959L,64960L,64961L,64962L,
64963L,64964L,64965L,64966L,64967L,64968L,64969L,64970L,64971L,64972L,
64973L,64974L,64975L,64976L,64977L,64978L,64979L,64980L,64981L,64982L,
64983L,64984L,64985L,64986L,64987L,64988L,64989L,64990L,64991L,64992L,
64993L,64994L,64995L,64996L,64997L,64998L,64999L,65000L,65001L,65002L,
65003L,65004L,65005L,65006L,65007L,65008L,65009L,65010L,65011L,65012L,
65013L,65014L,65015L,65016L,65017L,65018L,65019L,65020L,65021L,65022L,
65023L,65024L,65025L,65026L,65027L,65028L,65029L,65030L,65031L,65032L,
65033L,65034L,65035L,65036L,65037L,65038L,65039L,65040L,65041L,65042L,
65043L,65044L,65045L,65046L,65047L,65048L,65049L,65050L,65051L,65052L,
65053L,65054L,65055L,65056L,65057L,65058L,65059L,65060L,65061L,65062L,
65063L,65064L,65065L,65066L,65067L,65068L,65069L,65070L,65071L,65072L,
65073L,65074L,65075L,65076L,65077L,65078L,65079L,65080L,65081L,65082L,
65083L,65084L,65085L,65086L,65087L,65088L,65089L,65090L,65091L,65092L,
65093L,65094L,65095L,65096L,65097L,65098L,65099L,65100L,65101L,65102L,
65103L,65104L,65105L,65106L,65107L,65108L,65109L,65110L,65111L,65112L,
65113L,65114L,65115L,65116L,65117L,65118L,65119L,65120L,65121L,65122L,
65123L,65124L,65125L,65126L,65127L,65128L,65129L,65130L,65131L,65132L,
65133L,65134L,65135L,65136L,65137L,65138L,65139L,65140L,65141L,65142L,
65143L,65144L,65145L,65146L,65147L,65148L,65149L,65150L,65151L,65152L,
65153L,65154L,65155L,65156L,65157L,65158L,65159L,65160L,65161L,65162L,
65163L,65164L,65165L,65166L,65167L,65168L,65169L,65170L,65171L,65172L,
65173L,65174L,65175L,65176L,65177L,65178L,65179L,65180L,65181L,65182L,
65183L,65184L,65185L,65186L,65187L,65188L,65189L,65190L,65191L,65192L,
65193L,65194L,65195L,65196L,65197L,65198L,65199L,65200L,65201L,65202L,
65203L,65204L,65205L,65206L,65207L,65208L,65209L,65210L,65211L,65212L,
65213L,65214L,65215L,65216L,65217L,65218L,65219L,65220L,65221L,65222L,
65223L,65224L,65225L,65226L,65227L,65228L,65229L,65230L,65231L,65232L,
65233L,65234L,65235L,65236L,65237L,65238L,65239L,65240L,65241L,65242L,
65243L,65244L,65245L,65246L,65247L,65248L,65249L,65250L,65251L,65252L,
65253L,65254L,65255L,65256L,65257L,65258L,65259L,65260L,65261L,65262L,
65263L,65264L,65265L,65266L,65267L,65268L,65269L,65270L,65271L,65272L,
65273L,65274L,65275L,65276L,65277L,65278L,65279L,65280L,65281L,65282L,
65283L,65284L,65285L,65286L,65287L,65288L,65289L,65290L,65291L,65292L,
65293L,65294L,65295L,65296L,65297L,65298L,65299L,65300L,65301L,65302L,
65303L,65304L,65305L,65306L,65307L,65308L,65309L,65310L,65311L,65312L,
65313L,65314L,65315L,65316L,65317L,65318L,65319L,65320L,65321L,65322L,
65323L,65324L,65325L,65326L,65327L,65328L,65329L,65330L,65331L,65332L,
65333L,65334L,65335L,65336L,65337L,65338L,65339L,65340L,65341L,65342L,
65343L,65344L,65313L,65314L,65315L,65316L,65317L,65318L,65319L,65320L,
65321L,65322L,65323L,65324L,65325L,65326L,65327L,65328L,65329L,65330L,
65331L,65332L,65333L,65334L,65335L,65336L,65337L,65338L,65371L,65372L,
65373L,65374L,65375L,65376L,65377L,65378L,65379L,65380L,65381L,65382L,
65383L,65384L,65385L,65386L,65387L,65388L,65389L,65390L,65391L,65392L,
65393L,65394L,65395L,65396L,65397L,65398L,65399L,65400L,65401L,65402L,
65403L,65404L,65405L,65406L,65407L,65408L,65409L,65410L,65411L,65412L,
65413L,65414L,65415L,65416L,65417L,65418L,65419L,65420L,65421L,65422L,
65423L,65424L,65425L,65426L,65427L,65428L,65429L,65430L,65431L,65432L,
65433L,65434L,65435L,65436L,65437L,65438L,65439L,65440L,65441L,65442L,
65443L,65444L,65445L,65446L,65447L,65448L,65449L,65450L,65451L,65452L,
65453L,65454L,65455L,65456L,65457L,65458L,65459L,65460L,65461L,65462L,
65463L,65464L,65465L,65466L,65467L,65468L,65469L,65470L,65471L,65472L,
65473L,65474L,65475L,65476L,65477L,65478L,65479L,65480L,65481L,65482L,
65483L,65484L,65485L,65486L,65487L,65488L,65489L,65490L,65491L,65492L,
65493L,65494L,65495L,65496L,65497L,65498L,65499L,65500L,65501L,65502L,
65503L,65504L,65505L,65506L,65507L,65508L,65509L,65510L,65511L,65512L,
65513L,65514L,65515L,65516L,65517L,65518L,65519L,65520L,65521L,65522L,
65523L,65524L,65525L,65526L,65527L,65528L,65529L,65530L,65531L,65532L,
65533L,65534L,65535L,
};
#endif
#line 1 "duk_util_bitdecoder.c"
/*
* Bitstream decoder.
*/
/* include removed: duk_internal.h */
/* Decode 'bits' bits from the input stream (bits must be 1...24).
* When reading past bitstream end, zeroes are shifted in. The result
* is signed to match duk_bd_decode_flagged.
*/
DUK_INTERNAL duk_int32_t duk_bd_decode(duk_bitdecoder_ctx *ctx, duk_small_int_t bits) {
duk_small_int_t shift;
duk_uint32_t mask;
duk_uint32_t tmp;
/* Note: cannot read more than 24 bits without possibly shifting top bits out.
* Fixable, but adds complexity.
*/
DUK_ASSERT(bits >= 1 && bits <= 24);
while (ctx->currbits < bits) {
#if 0
DUK_DDD(DUK_DDDPRINT("decode_bits: shift more data (bits=%ld, currbits=%ld)",
(long) bits, (long) ctx->currbits));
#endif
ctx->currval <<= 8;
if (ctx->offset < ctx->length) {
/* If ctx->offset >= ctx->length, we "shift zeroes in"
* instead of croaking.
*/
ctx->currval |= ctx->data[ctx->offset++];
}
ctx->currbits += 8;
}
#if 0
DUK_DDD(DUK_DDDPRINT("decode_bits: bits=%ld, currbits=%ld, currval=0x%08lx",
(long) bits, (long) ctx->currbits, (unsigned long) ctx->currval));
#endif
/* Extract 'top' bits of currval; note that the extracted bits do not need
* to be cleared, we just ignore them on next round.
*/
shift = ctx->currbits - bits;
mask = (1 << bits) - 1;
tmp = (ctx->currval >> shift) & mask;
ctx->currbits = shift; /* remaining */
#if 0
DUK_DDD(DUK_DDDPRINT("decode_bits: %ld bits -> 0x%08lx (%ld), currbits=%ld, currval=0x%08lx",
(long) bits, (unsigned long) tmp, (long) tmp, (long) ctx->currbits, (unsigned long) ctx->currval));
#endif
return tmp;
}
DUK_INTERNAL duk_small_int_t duk_bd_decode_flag(duk_bitdecoder_ctx *ctx) {
return (duk_small_int_t) duk_bd_decode(ctx, 1);
}
/* Decode a one-bit flag, and if set, decode a value of 'bits', otherwise return
* default value. Return value is signed so that negative marker value can be
* used by caller as a "not present" value.
*/
DUK_INTERNAL duk_int32_t duk_bd_decode_flagged(duk_bitdecoder_ctx *ctx, duk_small_int_t bits, duk_int32_t def_value) {
if (duk_bd_decode_flag(ctx)) {
return (duk_int32_t) duk_bd_decode(ctx, bits);
} else {
return def_value;
}
}
#line 1 "duk_util_bitencoder.c"
/*
* Bitstream encoder.
*/
/* include removed: duk_internal.h */
DUK_INTERNAL void duk_be_encode(duk_bitencoder_ctx *ctx, duk_uint32_t data, duk_small_int_t bits) {
duk_uint8_t tmp;
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(ctx->currbits < 8);
/* This limitation would be fixable but adds unnecessary complexity. */
DUK_ASSERT(bits >= 1 && bits <= 24);
ctx->currval = (ctx->currval << bits) | data;
ctx->currbits += bits;
while (ctx->currbits >= 8) {
if (ctx->offset < ctx->length) {
tmp = (duk_uint8_t) ((ctx->currval >> (ctx->currbits - 8)) & 0xff);
ctx->data[ctx->offset++] = tmp;
} else {
/* If buffer has been exhausted, truncate bitstream */
ctx->truncated = 1;
}
ctx->currbits -= 8;
}
}
DUK_INTERNAL void duk_be_finish(duk_bitencoder_ctx *ctx) {
duk_small_int_t npad;
DUK_ASSERT(ctx != NULL);
DUK_ASSERT(ctx->currbits < 8);
npad = (duk_small_int_t) (8 - ctx->currbits);
if (npad > 0) {
duk_be_encode(ctx, 0, npad);
}
DUK_ASSERT(ctx->currbits == 0);
}
#line 1 "duk_util_bufwriter.c"
/*
* Fast buffer writer with spare management.
*/
/* include removed: duk_internal.h */
/*
* Macro support functions (use only macros in calling code)
*/
DUK_LOCAL void duk__bw_update_ptrs(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx, duk_size_t curr_offset, duk_size_t new_length) {
duk_uint8_t *p;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(bw_ctx != NULL);
DUK_UNREF(thr);
p = (duk_uint8_t *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, bw_ctx->buf);
DUK_ASSERT(p != NULL || (DUK_HBUFFER_DYNAMIC_GET_SIZE(bw_ctx->buf) == 0 && curr_offset == 0 && new_length == 0));
bw_ctx->p = p + curr_offset;
bw_ctx->p_base = p;
bw_ctx->p_limit = p + new_length;
}
DUK_INTERNAL void duk_bw_init(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx, duk_hbuffer_dynamic *h_buf) {
DUK_ASSERT(thr != NULL);
DUK_ASSERT(bw_ctx != NULL);
DUK_ASSERT(h_buf != NULL);
DUK_UNREF(thr);
bw_ctx->buf = h_buf;
duk__bw_update_ptrs(thr, bw_ctx, 0, DUK_HBUFFER_DYNAMIC_GET_SIZE(h_buf));
}
DUK_INTERNAL void duk_bw_init_pushbuf(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx, duk_size_t buf_size) {
duk_context *ctx;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(bw_ctx != NULL);
ctx = (duk_context *) thr;
(void) duk_push_dynamic_buffer(ctx, buf_size);
bw_ctx->buf = (duk_hbuffer_dynamic *) duk_get_hbuffer(ctx, -1);
duk__bw_update_ptrs(thr, bw_ctx, 0, buf_size);
}
/* Resize target buffer for requested size. Called by the macro only when the
* fast path test (= there is space) fails.
*/
DUK_INTERNAL duk_uint8_t *duk_bw_resize(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx, duk_size_t sz) {
duk_size_t curr_off;
duk_size_t add_sz;
duk_size_t new_sz;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(bw_ctx != NULL);
/* We could do this operation without caller updating bw_ctx->ptr,
* but by writing it back here we can share code better.
*/
curr_off = (duk_size_t) (bw_ctx->p - bw_ctx->p_base);
add_sz = (curr_off >> DUK_BW_SPARE_SHIFT) + DUK_BW_SPARE_ADD;
new_sz = curr_off + sz + add_sz;
if (new_sz < curr_off) {
/* overflow */
DUK_ERROR_RANGE(thr, DUK_STR_BUFFER_TOO_LONG);
return NULL; /* not reachable */
}
#if 0 /* for manual torture testing: tight allocation, useful with valgrind */
new_sz = curr_off + sz;
#endif
/* This is important to ensure dynamic buffer data pointer is not
* NULL (which is possible if buffer size is zero), which in turn
* causes portability issues with e.g. memmove() and memcpy().
*/
DUK_ASSERT(new_sz >= 1);
DUK_DD(DUK_DDPRINT("resize bufferwriter from %ld to %ld (add_sz=%ld)", (long) curr_off, (long) new_sz, (long) add_sz));
duk_hbuffer_resize(thr, bw_ctx->buf, new_sz);
duk__bw_update_ptrs(thr, bw_ctx, curr_off, new_sz);
return bw_ctx->p;
}
/* Make buffer compact, matching current written size. */
DUK_INTERNAL void duk_bw_compact(duk_hthread *thr, duk_bufwriter_ctx *bw_ctx) {
duk_size_t len;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(bw_ctx != NULL);
DUK_UNREF(thr);
len = (duk_size_t) (bw_ctx->p - bw_ctx->p_base);
duk_hbuffer_resize(thr, bw_ctx->buf, len);
duk__bw_update_ptrs(thr, bw_ctx, len, len);
}
DUK_INTERNAL void duk_bw_write_raw_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t src_off, duk_size_t len) {
duk_uint8_t *p_base;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(bw != NULL);
DUK_ASSERT(src_off <= DUK_BW_GET_SIZE(thr, bw));
DUK_ASSERT(len <= DUK_BW_GET_SIZE(thr, bw));
DUK_ASSERT(src_off + len <= DUK_BW_GET_SIZE(thr, bw));
DUK_UNREF(thr);
p_base = bw->p_base;
DUK_MEMCPY((void *) bw->p,
(const void *) (p_base + src_off),
(size_t) len);
bw->p += len;
}
DUK_INTERNAL void duk_bw_write_ensure_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t src_off, duk_size_t len) {
DUK_ASSERT(thr != NULL);
DUK_ASSERT(bw != NULL);
DUK_ASSERT(src_off <= DUK_BW_GET_SIZE(thr, bw));
DUK_ASSERT(len <= DUK_BW_GET_SIZE(thr, bw));
DUK_ASSERT(src_off + len <= DUK_BW_GET_SIZE(thr, bw));
DUK_UNREF(thr);
DUK_BW_ENSURE(thr, bw, len);
duk_bw_write_raw_slice(thr, bw, src_off, len);
}
DUK_INTERNAL void duk_bw_insert_raw_bytes(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t dst_off, const duk_uint8_t *buf, duk_size_t len) {
duk_uint8_t *p_base;
duk_size_t buf_sz, move_sz;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(bw != NULL);
DUK_ASSERT(dst_off <= DUK_BW_GET_SIZE(thr, bw));
DUK_ASSERT(buf != NULL);
DUK_UNREF(thr);
p_base = bw->p_base;
buf_sz = bw->p - p_base;
move_sz = buf_sz - dst_off;
DUK_ASSERT(p_base != NULL); /* buffer size is >= 1 */
DUK_MEMMOVE((void *) (p_base + dst_off + len),
(const void *) (p_base + dst_off),
(size_t) move_sz);
DUK_MEMCPY((void *) (p_base + dst_off),
(const void *) buf,
(size_t) len);
bw->p += len;
}
DUK_INTERNAL void duk_bw_insert_ensure_bytes(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t dst_off, const duk_uint8_t *buf, duk_size_t len) {
DUK_ASSERT(thr != NULL);
DUK_ASSERT(bw != NULL);
DUK_ASSERT(dst_off <= DUK_BW_GET_SIZE(thr, bw));
DUK_ASSERT(buf != NULL);
DUK_UNREF(thr);
DUK_BW_ENSURE(thr, bw, len);
duk_bw_insert_raw_bytes(thr, bw, dst_off, buf, len);
}
DUK_INTERNAL void duk_bw_insert_raw_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t dst_off, duk_size_t src_off, duk_size_t len) {
duk_uint8_t *p_base;
duk_size_t buf_sz, move_sz;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(bw != NULL);
DUK_ASSERT(dst_off <= DUK_BW_GET_SIZE(thr, bw));
DUK_ASSERT(src_off <= DUK_BW_GET_SIZE(thr, bw));
DUK_ASSERT(len <= DUK_BW_GET_SIZE(thr, bw));
DUK_ASSERT(src_off + len <= DUK_BW_GET_SIZE(thr, bw));
DUK_UNREF(thr);
p_base = bw->p_base;
/* Don't support "straddled" source now. */
DUK_ASSERT(dst_off <= src_off || dst_off >= src_off + len);
if (dst_off <= src_off) {
/* Target is before source. Source offset is expressed as
* a "before change" offset. Account for the memmove.
*/
src_off += len;
}
buf_sz = bw->p - p_base;
move_sz = buf_sz - dst_off;
DUK_ASSERT(p_base != NULL); /* buffer size is >= 1 */
DUK_MEMMOVE((void *) (p_base + dst_off + len),
(const void *) (p_base + dst_off),
(size_t) move_sz);
DUK_MEMCPY((void *) (p_base + dst_off),
(const void *) (p_base + src_off),
(size_t) len);
bw->p += len;
}
DUK_INTERNAL void duk_bw_insert_ensure_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t dst_off, duk_size_t src_off, duk_size_t len) {
DUK_ASSERT(thr != NULL);
DUK_ASSERT(bw != NULL);
DUK_ASSERT(dst_off <= DUK_BW_GET_SIZE(thr, bw));
DUK_ASSERT(src_off <= DUK_BW_GET_SIZE(thr, bw));
DUK_ASSERT(len <= DUK_BW_GET_SIZE(thr, bw));
DUK_ASSERT(src_off + len <= DUK_BW_GET_SIZE(thr, bw));
DUK_UNREF(thr);
/* Don't support "straddled" source now. */
DUK_ASSERT(dst_off <= src_off || dst_off >= src_off + len);
DUK_BW_ENSURE(thr, bw, len);
duk_bw_insert_raw_slice(thr, bw, dst_off, src_off, len);
}
DUK_INTERNAL duk_uint8_t *duk_bw_insert_raw_area(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t off, duk_size_t len) {
duk_uint8_t *p_base, *p_dst, *p_src;
duk_size_t buf_sz, move_sz;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(bw != NULL);
DUK_ASSERT(off <= DUK_BW_GET_SIZE(thr, bw));
DUK_UNREF(thr);
p_base = bw->p_base;
buf_sz = bw->p - p_base;
move_sz = buf_sz - off;
p_dst = p_base + off + len;
p_src = p_base + off;
DUK_MEMMOVE((void *) p_dst, (const void *) p_src, (size_t) move_sz);
return p_src; /* point to start of 'reserved area' */
}
DUK_INTERNAL duk_uint8_t *duk_bw_insert_ensure_area(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t off, duk_size_t len) {
DUK_ASSERT(thr != NULL);
DUK_ASSERT(bw != NULL);
DUK_ASSERT(off <= DUK_BW_GET_SIZE(thr, bw));
DUK_UNREF(thr);
DUK_BW_ENSURE(thr, bw, len);
return duk_bw_insert_raw_area(thr, bw, off, len);
}
DUK_INTERNAL void duk_bw_remove_raw_slice(duk_hthread *thr, duk_bufwriter_ctx *bw, duk_size_t off, duk_size_t len) {
duk_size_t move_sz;
duk_uint8_t *p_base;
duk_uint8_t *p_src;
duk_uint8_t *p_dst;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(bw != NULL);
DUK_ASSERT(off <= DUK_BW_GET_SIZE(thr, bw));
DUK_ASSERT(len <= DUK_BW_GET_SIZE(thr, bw));
DUK_ASSERT(off + len <= DUK_BW_GET_SIZE(thr, bw));
DUK_UNREF(thr);
p_base = bw->p_base;
p_dst = p_base + off;
p_src = p_dst + len;
move_sz = (duk_size_t) (bw->p - p_src);
DUK_MEMMOVE((void *) p_dst,
(const void *) p_src,
(size_t) move_sz);
bw->p -= len;
}
/*
* Macro support functions for reading/writing raw data.
*
* These are done using mempcy to ensure they're valid even for unaligned
* reads/writes on platforms where alignment counts. On x86 at least gcc
* is able to compile these into a bswap+mov. "Always inline" is used to
* ensure these macros compile to minimal code.
*
* Not really bufwriter related, but currently used together.
*/
DUK_INTERNAL DUK_ALWAYS_INLINE duk_uint16_t duk_raw_read_u16_be(duk_uint8_t **p) {
union {
duk_uint8_t b[2];
duk_uint16_t x;
} u;
DUK_MEMCPY((void *) u.b, (const void *) (*p), (size_t) 2);
u.x = DUK_NTOH16(u.x);
*p += 2;
return u.x;
}
DUK_INTERNAL DUK_ALWAYS_INLINE duk_uint32_t duk_raw_read_u32_be(duk_uint8_t **p) {
union {
duk_uint8_t b[4];
duk_uint32_t x;
} u;
DUK_MEMCPY((void *) u.b, (const void *) (*p), (size_t) 4);
u.x = DUK_NTOH32(u.x);
*p += 4;
return u.x;
}
DUK_INTERNAL DUK_ALWAYS_INLINE duk_double_t duk_raw_read_double_be(duk_uint8_t **p) {
duk_double_union du;
union {
duk_uint8_t b[4];
duk_uint32_t x;
} u;
DUK_MEMCPY((void *) u.b, (const void *) (*p), (size_t) 4);
u.x = DUK_NTOH32(u.x);
du.ui[DUK_DBL_IDX_UI0] = u.x;
DUK_MEMCPY((void *) u.b, (const void *) (*p + 4), (size_t) 4);
u.x = DUK_NTOH32(u.x);
du.ui[DUK_DBL_IDX_UI1] = u.x;
*p += 8;
return du.d;
}
DUK_INTERNAL DUK_ALWAYS_INLINE void duk_raw_write_u16_be(duk_uint8_t **p, duk_uint16_t val) {
union {
duk_uint8_t b[2];
duk_uint16_t x;
} u;
u.x = DUK_HTON16(val);
DUK_MEMCPY((void *) (*p), (const void *) u.b, (size_t) 2);
*p += 2;
}
DUK_INTERNAL DUK_ALWAYS_INLINE void duk_raw_write_u32_be(duk_uint8_t **p, duk_uint32_t val) {
union {
duk_uint8_t b[4];
duk_uint32_t x;
} u;
u.x = DUK_HTON32(val);
DUK_MEMCPY((void *) (*p), (const void *) u.b, (size_t) 4);
*p += 4;
}
DUK_INTERNAL DUK_ALWAYS_INLINE void duk_raw_write_double_be(duk_uint8_t **p, duk_double_t val) {
duk_double_union du;
union {
duk_uint8_t b[4];
duk_uint32_t x;
} u;
du.d = val;
u.x = du.ui[DUK_DBL_IDX_UI0];
u.x = DUK_HTON32(u.x);
DUK_MEMCPY((void *) (*p), (const void *) u.b, (size_t) 4);
u.x = du.ui[DUK_DBL_IDX_UI1];
u.x = DUK_HTON32(u.x);
DUK_MEMCPY((void *) (*p + 4), (const void *) u.b, (size_t) 4);
*p += 8;
}
#line 1 "duk_util_hashbytes.c"
/*
* Hash function duk_util_hashbytes().
*
* Currently, 32-bit MurmurHash2.
*
* Don't rely on specific hash values; hash function may be endianness
* dependent, for instance.
*/
/* include removed: duk_internal.h */
#if defined(DUK_USE_STRHASH_DENSE)
/* 'magic' constants for Murmurhash2 */
#define DUK__MAGIC_M ((duk_uint32_t) 0x5bd1e995UL)
#define DUK__MAGIC_R 24
DUK_INTERNAL duk_uint32_t duk_util_hashbytes(const duk_uint8_t *data, duk_size_t len, duk_uint32_t seed) {
duk_uint32_t h = seed ^ ((duk_uint32_t) len);
while (len >= 4) {
/* Portability workaround is required for platforms without
* unaligned access. The replacement code emulates little
* endian access even on big endian architectures, which is
* OK as long as it is consistent for a build.
*/
#ifdef DUK_USE_HASHBYTES_UNALIGNED_U32_ACCESS
duk_uint32_t k = *((const duk_uint32_t *) (const void *) data);
#else
duk_uint32_t k = ((duk_uint32_t) data[0]) |
(((duk_uint32_t) data[1]) << 8) |
(((duk_uint32_t) data[2]) << 16) |
(((duk_uint32_t) data[3]) << 24);
#endif
k *= DUK__MAGIC_M;
k ^= k >> DUK__MAGIC_R;
k *= DUK__MAGIC_M;
h *= DUK__MAGIC_M;
h ^= k;
data += 4;
len -= 4;
}
switch (len) {
case 3: h ^= data[2] << 16;
case 2: h ^= data[1] << 8;
case 1: h ^= data[0];
h *= DUK__MAGIC_M;
}
h ^= h >> 13;
h *= DUK__MAGIC_M;
h ^= h >> 15;
return h;
}
#endif /* DUK_USE_STRHASH_DENSE */
#line 1 "duk_util_tinyrandom.c"
/*
* A tiny random number generator.
*
* Currently used for Math.random().
*
* http://www.woodmann.com/forum/archive/index.php/t-3100.html
*/
/* include removed: duk_internal.h */
#define DUK__UPDATE_RND(rnd) do { \
(rnd) += ((rnd) * (rnd)) | 0x05; \
(rnd) = ((rnd) & 0xffffffffU); /* if duk_uint32_t is exactly 32 bits, this is a NOP */ \
} while (0)
#define DUK__RND_BIT(rnd) ((rnd) >> 31) /* only use the highest bit */
DUK_INTERNAL duk_uint32_t duk_util_tinyrandom_get_bits(duk_hthread *thr, duk_small_int_t n) {
duk_small_int_t i;
duk_uint32_t res = 0;
duk_uint32_t rnd;
rnd = thr->heap->rnd_state;
for (i = 0; i < n; i++) {
DUK__UPDATE_RND(rnd);
res <<= 1;
res += DUK__RND_BIT(rnd);
}
thr->heap->rnd_state = rnd;
return res;
}
DUK_INTERNAL duk_double_t duk_util_tinyrandom_get_double(duk_hthread *thr) {
duk_double_t t;
duk_small_int_t n;
duk_uint32_t rnd;
/*
* XXX: could make this a lot faster if we create the double memory
* representation directly. Feasible easily (must be uniform random).
*/
rnd = thr->heap->rnd_state;
n = 53; /* enough to cover the whole mantissa */
t = 0.0;
do {
DUK__UPDATE_RND(rnd);
t += DUK__RND_BIT(rnd);
t /= 2.0;
} while (--n);
thr->heap->rnd_state = rnd;
DUK_ASSERT(t >= (duk_double_t) 0.0);
DUK_ASSERT(t < (duk_double_t) 1.0);
return t;
}
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