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BizHawk/waterbox/libc/internals/_PDCLIB_aux.h

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/* Auxiliary PDCLib code <_PDCLIB_aux.h>
This file is part of the Public Domain C Library (PDCLib).
Permission is granted to use, modify, and / or redistribute at will.
*/
#ifndef __PDCLIB_AUX_H
#define __PDCLIB_AUX_H __PDCLIB_AUX_H
/* -------------------------------------------------------------------------- */
/* You should not have to edit anything in this file; if you DO have to, it */
/* would be considered a bug / missing feature: notify the author(s). */
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
/* Standard Version */
/* -------------------------------------------------------------------------- */
/* Many a compiler gets this wrong, so you might have to hardcode it instead. */
#if __STDC__ != 1
#error Compiler does not define _ _STDC_ _ to 1 (not standard-compliant)!
#endif
#if defined(_PDCLIB_C_VERSION)
/* Pass - conditional simplification case */
#elif !defined(__STDC_VERSION__)
#define _PDCLIB_C_VERSION 1990
#elif __STDC_VERSION__ == 199409L
#define _PDCLIB_C_VERSION 1995
#elif __STDC_VERSION__ == 199901L
#define _PDCLIB_C_VERSION 1999
#elif __STDC_VERSION__ == 201112L
#define _PDCLIB_C_VERSION 2011
#else
#error Unsupported _ _STDC_VERSION_ _ (__STDC_VERSION__) (supported: ISO/IEC 9899:1990, 9899/AMD1:1995, 9899:1999, 9899:2011).
#endif
#if !defined(__cplusplus) || defined(_PDCLIB_CXX_VERSION)
#define _PDCLIB_CXX_VERSION 0
#elif __cplusplus == 201103L
#define _PDCLIB_CXX_VERSION 2011
/* TODO: Do we want this? */
#if _PDCLIB_C_VERSION < 2011
#undef _PDCLIB_C_VERSION
#define _PDCLIB_C_VERSION 2011
#endif
#elif __cplusplus == 199711L
#define _PDCLIB_CXX_VERSION 1997
#else
#error Unsupported _ _cplusplus (__cplusplus) (supported: ISO/IEC 14882:1997, ISO/IEC 14882:2011).
#endif
#ifndef __STDC_HOSTED__
#error Compiler does not define _ _STDC_HOSTED_ _ (not standard-compliant)!
#elif __STDC_HOSTED__ == 0
#define _PDCLIB_HOSTED 0
#elif __STDC_HOSTED__ == 1
#define _PDCLIB_HOSTED 1
#else
#error Compiler does not define _ _STDC_HOSTED_ _ to 0 or 1 (not standard-compliant)!
#endif
#ifdef __cplusplus
typedef bool _PDCLIB_bool;
#else
typedef _Bool _PDCLIB_bool;
#endif
/* Clang style feature detection macros
* Note: It is common to #define __has_feature(0) if undefined so the presence
* of this macro does not guarantee it to be working
*/
#ifdef __has_feature
#define _PDCLIB_HAS_FEATURE(x) __has_feature(x)
#else
#define _PDCLIB_HAS_FEATURE(x) (0)
#endif
#ifdef __has_extension
#define _PDCLIB_HAS_EXTENSION(x) __has_extension(x)
#else
// Older versions of Clang use __has_feature instead
#define _PDCLIB_HAS_EXTENSION(x) _PDCLIB_HAS_FEATURE(x)
#endif
#ifdef __has_builtin
#define _PDCLIB_HAS_BUILTIN(x) __has_builtin(x)
#else
#define _PDCLIB_HAS_BUILTIN(x) (0)
#endif
#ifdef __has_attribute
#define _PDCLIB_HAS_ATTRIBUTE(x) __has_attribute(x)
#else
#define _PDCLIB_HAS_ATTRIBUTE(x) (0)
#endif
/* GCC feature detection macros */
#if defined(__GNUC__)
#define _PDCLIB_GCC_MIN(maj, min) \
((__GNUC__ > maj) || (__GNUC__ == maj && __GNUC_MINOR__ >= min))
#else
#define _PDCLIB_GCC_MIN(maj, min) (0)
#endif
/* Hybrid GCC/Clang feature detection macros */
#define _PDCLIB_GCC_FEATURE(x, gccmaj, gccmin) \
(_PDCLIB_HAS_FEATURE(x) || _PDCLIB_GCC_MIN(gccmin, gccmaj))
#define _PDCLIB_GCC_EXTENSION(x, gccmaj, gccmin) \
(_PDCLIB_HAS_EXTENSION(x) || _PDCLIB_GCC_MIN(gccmin, gccmaj))
#define _PDCLIB_GCC_BUILTIN(x, gccmaj, gccmin) \
(_PDCLIB_HAS_BUILTIN(x) || _PDCLIB_GCC_MIN(gccmin, gccmaj))
#define _PDCLIB_GCC_ATTRIBUTE(x, gccmaj, gccmin) \
(_PDCLIB_HAS_ATTRIBUTE(x) || _PDCLIB_GCC_MIN(gccmin, gccmaj))
/* Extension & Language feature detection */
#if _PDCLIB_C_VERSION >= 1999 || defined(__cplusplus)
#ifndef __cplusplus
#define _PDCLIB_restrict restrict
#endif
#define _PDCLIB_inline inline
#endif
#if _PDCLIB_CXX_VERSION >= 2011
#define _PDCLIB_nothrow noexcept
#define _PDCLIB_noexcept(x) noexcept(x)
#elif _PDCLIB_CXX_VERSION
#define _PDCLIB_nothrow throw()
#define _PDCLIB_noexcept
#endif
#if _PDCLIB_CXX_VERSION >= 2011 && _PDCLIB_GCC_FEATURE(cxx_attributes, 4, 8)
#define _PDCLIB_noreturn [[noreturn]]
#elif _PDCLIB_C_VERSION >= 2011 && _PDCLIB_GCC_FEATURE(c_noreturn, 4, 7)
#define _PDCLIB_noreturn _Noreturn
#endif
#ifdef _WIN32
#define _PDCLIB_EXPORT __declspec(dllexport)
#define _PDCLIB_IMPORT __declspec(dllimport)
#endif
#if !defined(_PDCLIB_EXPORT) && _PDCLIB_GCC_ATTRIBUTE(__visibility__, 4, 0)
#define _PDCLIB_EXPORT __attribute__((__visibility__("protected")))
#endif
#if !defined(_PDCLIB_HIDDEN) && _PDCLIB_GCC_ATTRIBUTE(__visibility__, 4, 0)
#define _PDCLIB_HIDDEN __attribute__((__visibility__("hidden")))
#endif
#if !defined(_PDCLIB_nothrow) && _PDCLIB_GCC_ATTRIBUTE(__nothrow__, 4, 0)
#define _PDCLIB_nothrow __attribute__((__nothrow__))
#define _PDCLIB_noexcept
#endif
#if !defined(_PDCLIB_restrict) && _PDCLIB_GCC_MIN(3, 0)
#define _PDCLIB_restrict __restrict
#endif
#if !defined(_PDCLIB_inline) && _PDCLIB_GCC_MIN(3, 0)
#define _PDCLIB_inline __inline
#endif
#if !defined(_PDCLIB_noreturn) && _PDCLIB_GCC_ATTRIBUTE(__noreturn__, 3, 0)
/* If you don't use __noreturn__, then stdnoreturn.h will break things! */
#define _PDCLIB_noreturn __attribute__((__noreturn__))
#endif
#if !defined(_PDCLIB_DEPRECATED) && _PDCLIB_GCC_ATTRIBUTE(__deprecated__, 3, 0)
#define _PDCLIB_DEPRECATED __attribute__ ((__deprecated__))
#endif
#if !defined(_PDCLIB_UNREACHABLE) && _PDCLIB_GCC_BUILTIN(__builtin_unreachable, 4, 0)
#define _PDCLIB_UNREACHABLE __builtin_unreachable()
#endif
#if !defined(_PDCLIB_UNDEFINED) && defined(__GNUC__)
#define _PDCLIB_UNDEFINED(_var) \
do { __asm__("" : "=X"(_var)); } while(0)
#endif
/* No-op fallbacks */
#ifndef _PDCLIB_nothrow
#define _PDCLIB_nothrow
#define _PDCLIB_noexcept
#endif
#ifndef _PDCLIB_EXPORT
#define _PDCLIB_EXPORT
#endif
#ifndef _PDCLIB_IMPORT
#define _PDCLIB_IMPORT
#endif
#ifndef _PDCLIB_HIDDEN
#define _PDCLIB_HIDDEN
#endif
#if defined(_PDCLIB_SHARED)
#if defined(_PDCLIB_BUILD)
#define _PDCLIB_API _PDCLIB_EXPORT
#else
#define _PDCLIB_API _PDCLIB_IMPORT
#endif
#else
#define _PDCLIB_API
#endif
#ifndef _PDCLIB_restrict
#define _PDCLIB_restrict
#endif
#ifndef _PDCLIB_inline
#define _PDCLIB_inline
#endif
#ifndef _PDCLIB_noreturn
#define _PDCLIB_noreturn
#endif
#ifndef _PDCLIB_DEPRECATED
#define _PDCLIB_DEPRECATED
#endif
#ifndef _PDCLIB_UNREACHABLE
#define _PDCLIB_UNREACHABLE do {} while(0)
#endif
#ifndef _PDCLIB_UNDEFINED
#define _PDCLIB_UNDEFINED(_var) do {} while(0)
#endif
/*#if _PDCLIB_C_VERSION != 1999
#error PDCLib might not be fully conforming to either C89 or C95 prior to v2.x.
#endif*/
/* -------------------------------------------------------------------------- */
/* Helper macros: */
/* _PDCLIB_cc( x, y ) concatenates two preprocessor tokens without extending */
/* _PDCLIB_concat( x, y ) concatenates two preprocessor tokens with extending */
/* _PDCLIB_concat3( x, y, z ) is the same for three tokens */
/* _PDCLIB_static_assert( x ) provides a compile-time check mechanism */
/* -------------------------------------------------------------------------- */
#define _PDCLIB_cc( x, y ) x ## y
#define _PDCLIB_concat( x, y ) _PDCLIB_cc( x, y )
#define _PDCLIB_concat3( x, y, z ) _PDCLIB_concat( _PDCLIB_concat( x, y ), z )
#if _PDCLIB_C_VERSION >= 2011
#define _PDCLIB_static_assert _Static_assert
#else
#define _PDCLIB_static_assert( e, m ) ;enum { _PDCLIB_concat( _PDCLIB_assert_, __LINE__ ) = 1 / ( !!( e ) ) }
#endif
#define _PDCLIB_symbol2value( x ) #x
#define _PDCLIB_symbol2string( x ) _PDCLIB_symbol2value( x )
/* Feature test macros
*
* All of the feature test macros come in the following forms
* _PDCLIB_*_MIN(min): Available in versions >= min
* _PDCLIB_*_MINMAX(min, max): Available in versions >= min <= max
* _PDCLIB_*_MAX(max): Availabel in versions <= max
*
* The defined tests are:
* C: C standard versions
* 1990, 1995, 1999, 2011
* CXX: C++ standard versions
* 1997, 2011
* POSIX: POSIX extension versions.
* 1 (POSIX.2), 2 (POSIX.2), 199309L (POSIX.1b),
* 199506L (POSIX.1c), 200112L (2001), 200809L (2008)
* XOPEN: X/Open System Interface (XSI)/Single Unix Specification
* 0 (XPG4), 500 (SUSv2/UNIX98), 600 (SUSv3/UNIX03), 700 (SUSv4)
*
* Additionally, the macros
* _BSD_SOURCE, _SVID_SOURCE and _GNU_SOURCE
* are adhered to. If _GNU_SOURCE is defined, _XOPEN_SOURCE and
* _POSIX_C_SOURCE are defined to their most recent values to match glibc
* behaviour
*
* The intention of supporting these feature test macros is to ease
* application portability from these systems to PDCLib systems; in addition,
* it eases support for these standards by systems supporting them which are
* using PDCLib as their default C library.
*
* Applications targetting purely PDClib/PDCLib based platforms may define
* just _PDCLIB_EXTENSIONS, which will enable all supported extensions, plus
* all features from all supported versions of C and C++.
*
*/
#define _PDCLIB_C_MIN(min) _PDCLIB_C_MINMAX(min, 3000)
#define _PDCLIB_CXX_MIN(min) _PDCLIB_CXX_MINMAX(min, 3000)
#define _PDCLIB_XOPEN_MIN(min) _PDCLIB_XOPEN_MINMAX(min, 30000000)
#define _PDCLIB_POSIX_MIN(min) _PDCLIB_POSIX_MINMAX(min, 30000000)
#define _PDCLIB_C_MAX(max) _PDCLIB_C_MINMAX(0, max)
#define _PDCLIB_CXX_MAX(max) _PDCLIB_CXX_MINMAX(0, max)
#define _PDCLIB_XOPEN_MAX(max) _PDCLIB_XOPEN_MINMAX(0, max)
#define _PDCLIB_POSIX_MAX(max) _PDCLIB_POSIX_MINMAX(0, max)
#if defined(_PDCLIB_EXTENSIONS) || defined(_PDCLIB_BUILD)
#define _PDCLIB_C_MINMAX(min, max) 1
#define _PDCLIB_CXX_MINMAX(min, max) 1
#define _PDCLIB_POSIX_MINMAX(min, max) 1
#define _PDCLIB_XOPEN_MINMAX(min, max) 1
#undef _PDCLIB_EXTENSIONS
#undef _PDCLIB_BSD_SOURCE
#undef _PDCLIB_SVID_SOURCE
#undef _PDCLIB_GNU_SOURCE
#define _PDCLIB_EXTENSIONS 1
#define _PDCLIB_BSD_SOURCE 1
#define _PDCLIB_SVID_SOURCE 1
#define _PDCLIB_GNU_SOURCE 1
#else
#define _PDCLIB_C_MINMAX(min, max) \
(_PDCLIB_C_VERSION >= (min) && _PDCLIB_C_VERSION <= (max))
#define _PDCLIB_CXX_MINMAX(min, max) \
(_PDCLIB_CXX_VERSION >= (min) && _PDCLIB_CXX_VERSION <= (max))
#define _PDCLIB_XOPEN_MINMAX(min, max) \
(defined(_XOPEN_SOURCE) \
&& _XOPEN_SOURCE >= (min) && _XOPEN_SOURCE <= (max))
#define _PDCLIB_POSIX_MINMAX(min, max) \
(defined(_POSIX_C_SOURCE) \
&& _POSIX_C_SOURCE >= (min) && _POSIX_C_SOURCE <= (max))
#if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE-1 == -1)
/* If _XOPEN_SOURCE is defined as empty, redefine here as zero */
#undef _XOPEN_SOURCE
#define _XOPEN_SOURCE 0
#endif
#if defined(_GNU_SOURCE)
#define _PDCLIB_GNU_SOURCE 1
#define _PDCLIB_SVID_SOURCE 1
#define _PDCLIB_BSD_SOURCE 1
#undef _XOPEN_SOURCE
#define _XOPEN_SOURCE 700
#else
#define _PDCLIB_GNU_SOURCE 0
#endif
#if defined(_PDCLIB_BSD_SOURCE)
// pass
#elif defined(_BSD_SOURCE)
#define _PDCLIB_BSD_SOURCE 1
#else
#define _PDCLIB_BSD_SOURCE 0
#endif
#if defined(_PDCLIB_SVID_SOURCE)
// pass
#elif defined(_SVID_SOURCE)
#define _PDCLIB_SVID_SOURCE 1
#else
#define _PDCLIB_SVID_SOURCE 0
#endif
#if _PDCLIB_XOPEN_MIN(700) && !_PDCLIB_POSIX_MIN(200809L)
#undef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 2008098L
#elif _PDCLIB_XOPEN_MIN(600) && !_PDCLIB_POSIX_MIN(200112L)
#undef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 200112L
#elif _PDCLIB_XOPEN_MIN(0) && !_PDCLIB_POSIX_MIN(2)
#undef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 2
#endif
#if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
#define _POSIX_C_SOURCE 1
#endif
#endif
#endif
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