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duckstation/dep/rapidyaml/include/c4/yml/common.hpp

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#ifndef _C4_YML_COMMON_HPP_
#define _C4_YML_COMMON_HPP_
#include <cstddef>
#include <c4/substr.hpp>
#include <c4/yml/export.hpp>
#ifndef RYML_USE_ASSERT
# define RYML_USE_ASSERT C4_USE_ASSERT
#endif
#if RYML_USE_ASSERT
# define RYML_ASSERT(cond) RYML_CHECK(cond)
# define RYML_ASSERT_MSG(cond, msg) RYML_CHECK_MSG(cond, msg)
#else
# define RYML_ASSERT(cond)
# define RYML_ASSERT_MSG(cond, msg)
#endif
#if defined(NDEBUG) || defined(C4_NO_DEBUG_BREAK)
# define RYML_DEBUG_BREAK()
#else
# define RYML_DEBUG_BREAK() \
{ \
if(c4::get_error_flags() & c4::ON_ERROR_DEBUGBREAK) \
{ \
C4_DEBUG_BREAK(); \
} \
}
#endif
#define RYML_CHECK(cond) \
do { \
if(!(cond)) \
{ \
RYML_DEBUG_BREAK() \
c4::yml::error("check failed: " #cond, c4::yml::Location(__FILE__, __LINE__, 0)); \
} \
} while(0)
#define RYML_CHECK_MSG(cond, msg) \
do \
{ \
if(!(cond)) \
{ \
RYML_DEBUG_BREAK() \
c4::yml::error(msg ": check failed: " #cond, c4::yml::Location(__FILE__, __LINE__, 0)); \
} \
} while(0)
#if C4_CPP >= 14
# define RYML_DEPRECATED(msg) [[deprecated(msg)]]
#else
# if defined(_MSC_VER)
# define RYML_DEPRECATED(msg) __declspec(deprecated(msg))
# else // defined(__GNUC__) || defined(__clang__)
# define RYML_DEPRECATED(msg) __attribute__((deprecated(msg)))
# endif
#endif
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
namespace c4 {
namespace yml {
C4_SUPPRESS_WARNING_GCC_CLANG_WITH_PUSH("-Wold-style-cast")
enum : size_t {
/** a null position */
npos = size_t(-1),
/** an index to none */
NONE = size_t(-1)
};
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
//! holds a position into a source buffer
struct RYML_EXPORT LineCol
{
//! number of bytes from the beginning of the source buffer
size_t offset;
//! line
size_t line;
//! column
size_t col;
LineCol() : offset(), line(), col() {}
//! construct from line and column
LineCol(size_t l, size_t c) : offset(0), line(l), col(c) {}
//! construct from offset, line and column
LineCol(size_t o, size_t l, size_t c) : offset(o), line(l), col(c) {}
};
//! a source file position
struct RYML_EXPORT Location : public LineCol
{
csubstr name;
operator bool () const { return !name.empty() || line != 0 || offset != 0; }
Location() : LineCol(), name() {}
Location( size_t l, size_t c) : LineCol{ l, c}, name( ) {}
Location( csubstr n, size_t l, size_t c) : LineCol{ l, c}, name(n) {}
Location( csubstr n, size_t b, size_t l, size_t c) : LineCol{b, l, c}, name(n) {}
Location(const char *n, size_t l, size_t c) : LineCol{ l, c}, name(to_csubstr(n)) {}
Location(const char *n, size_t b, size_t l, size_t c) : LineCol{b, l, c}, name(to_csubstr(n)) {}
};
//-----------------------------------------------------------------------------
/** the type of the function used to report errors. This function must
* interrupt execution, either by raising an exception or calling
* std::abort().
*
* @warning the error callback must never return: it must either abort
* or throw an exception. Otherwise, the parser will enter into an
* infinite loop, or the program may crash. */
using pfn_error = void (*)(const char* msg, size_t msg_len, Location location, void *user_data);
/** the type of the function used to allocate memory */
using pfn_allocate = void* (*)(size_t len, void* hint, void *user_data);
/** the type of the function used to free memory */
using pfn_free = void (*)(void* mem, size_t size, void *user_data);
/** trigger an error: call the current error callback. */
RYML_EXPORT void error(const char *msg, size_t msg_len, Location loc);
/** @overload error */
inline void error(const char *msg, size_t msg_len)
{
error(msg, msg_len, Location{});
}
/** @overload error */
template<size_t N>
inline void error(const char (&msg)[N], Location loc)
{
error(msg, N-1, loc);
}
/** @overload error */
template<size_t N>
inline void error(const char (&msg)[N])
{
error(msg, N-1, Location{});
}
//-----------------------------------------------------------------------------
/** a c-style callbacks class
*
* @warning the error callback must never return: it must either abort
* or throw an exception. Otherwise, the parser will enter into an
* infinite loop, or the program may crash. */
struct RYML_EXPORT Callbacks
{
void * m_user_data;
pfn_allocate m_allocate;
pfn_free m_free;
pfn_error m_error;
Callbacks();
Callbacks(void *user_data, pfn_allocate alloc, pfn_free free, pfn_error error_);
bool operator!= (Callbacks const& that) const { return !operator==(that); }
bool operator== (Callbacks const& that) const
{
return (m_user_data == that.m_user_data &&
m_allocate == that.m_allocate &&
m_free == that.m_free &&
m_error == that.m_error);
}
};
/** set the global callbacks.
*
* @warning the error callback must never return: it must either abort
* or throw an exception. Otherwise, the parser will enter into an
* infinite loop, or the program may crash. */
RYML_EXPORT void set_callbacks(Callbacks const& c);
/// get the global callbacks
RYML_EXPORT Callbacks const& get_callbacks();
/// set the global callbacks back to their defaults
RYML_EXPORT void reset_callbacks();
/// @cond dev
#define _RYML_CB_ERR(cb, msg_literal) \
do \
{ \
const char msg[] = msg_literal; \
RYML_DEBUG_BREAK() \
(cb).m_error(msg, sizeof(msg), c4::yml::Location(__FILE__, 0, __LINE__, 0), (cb).m_user_data); \
} while(0)
#define _RYML_CB_CHECK(cb, cond) \
do \
{ \
if(!(cond)) \
{ \
const char msg[] = "check failed: " #cond; \
RYML_DEBUG_BREAK() \
(cb).m_error(msg, sizeof(msg), c4::yml::Location(__FILE__, 0, __LINE__, 0), (cb).m_user_data); \
} \
} while(0)
#ifdef RYML_USE_ASSERT
#define _RYML_CB_ASSERT(cb, cond) _RYML_CB_CHECK((cb), (cond))
#else
#define _RYML_CB_ASSERT(cb, cond) do {} while(0)
#endif
#define _RYML_CB_ALLOC_HINT(cb, T, num, hint) (T*) (cb).m_allocate((num) * sizeof(T), (hint), (cb).m_user_data)
#define _RYML_CB_ALLOC(cb, T, num) _RYML_CB_ALLOC_HINT((cb), (T), (num), nullptr)
#define _RYML_CB_FREE(cb, buf, T, num) \
do { \
(cb).m_free((buf), (num) * sizeof(T), (cb).m_user_data); \
(buf) = nullptr; \
} while(0)
namespace detail {
template<int8_t signedval, uint8_t unsignedval>
struct _charconstant_t
: public std::conditional<std::is_signed<char>::value,
std::integral_constant<int8_t, signedval>,
std::integral_constant<uint8_t, unsignedval>>::type
{};
#define _RYML_CHCONST(signedval, unsignedval) ::c4::yml::detail::_charconstant_t<INT8_C(signedval), UINT8_C(unsignedval)>::value
} // namespace detail
namespace detail {
struct _SubstrWriter
{
substr buf;
size_t pos;
_SubstrWriter(substr buf_, size_t pos_=0) : buf(buf_), pos(pos_) {}
void append(csubstr s)
{
C4_ASSERT(!s.overlaps(buf));
if(pos + s.len <= buf.len)
memcpy(buf.str + pos, s.str, s.len);
pos += s.len;
}
void append(char c)
{
if(pos < buf.len)
buf.str[pos] = c;
++pos;
}
void append_n(char c, size_t numtimes)
{
if(pos + numtimes < buf.len)
memset(buf.str + pos, c, numtimes);
pos += numtimes;
}
size_t slack() const { return pos <= buf.len ? buf.len - pos : 0; }
size_t excess() const { return pos > buf.len ? pos - buf.len : 0; }
//! get the part written so far
csubstr curr() const { return pos <= buf.len ? buf.first(pos) : buf; }
//! get the part that is still free to write to (the remainder)
substr rem() { return pos < buf.len ? buf.sub(pos) : buf.last(0); }
size_t advance(size_t more) { pos += more; return pos; }
};
} // namespace detail
/// @endcond
C4_SUPPRESS_WARNING_GCC_CLANG_POP
} // namespace yml
} // namespace c4
#endif /* _C4_YML_COMMON_HPP_ */
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