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Edit File : stdckdint.h \| Size : 2.68 KB
#ifndef RBIMPL_STDCKDINT_H /--C++--vi:se ft=cpp:/ #define RBIMPL_STDCKDINT_H /** * @author Ruby developers <ruby-core@ruby-lang.org> * @copyright This file is a part of the programming language Ruby. * Permission is hereby granted, to either redistribute and/or * modify this file, provided that the conditions mentioned in the * file COPYING are met. Consult the file for details. * @warning Symbols prefixed with either `RBIMPL` or `rbimpl` are * implementation details. Don't take them as canon. They could * rapidly appear then vanish. The name (path) of this header file * is also an implementation detail. Do not expect it to persist * at the place it is now. Developers are free to move it anywhere * anytime at will. * @note To ruby-core: remember that this header can be possibly * recursively included from extension libraries written in C++. * Do not expect for instance `__VA_ARGS__` is always available. * We assume C99 for ruby itself but we don't assume languages of * extension libraries. They could be written in C++98. * @brief C23 shim for <stdckdint.h> / #include "ruby/internal/config.h" #include "ruby/internal/cast.h" #include "ruby/internal/has/builtin.h" #include "ruby/internal/stdbool.h" #ifdef __has_include # if __has_include(<stdckdint.h>) # / Conforming C23 situation; e.g. recent clang / # define RBIMPL_HAVE_STDCKDINT_H # endif #endif #ifdef HAVE_STDCKDINT_H # / Some OSes (most notably FreeBSD) have this file. / # define RBIMPL_HAVE_STDCKDINT_H #endif #ifdef __cplusplus # / It seems OS/Compiler provided stdckdint.h tend not support C++ yet. # * Situations could improve someday but in a meantime let us work around. # / # undef RBIMPL_HAVE_STDCKDINT_H #endif #ifdef RBIMPL_HAVE_STDCKDINT_H # / Take that. / # include <stdckdint.h> #elif RBIMPL_HAS_BUILTIN(__builtin_add_overflow) # define ckd_add(x, y, z) RBIMPL_CAST((bool)__builtin_add_overflow((y), (z), (x))) # define ckd_sub(x, y, z) RBIMPL_CAST((bool)__builtin_sub_overflow((y), (z), (x))) # define ckd_mul(x, y, z) RBIMPL_CAST((bool)__builtin_mul_overflow((y), (z), (x))) # define __STDC_VERSION_STDCKDINT_H__ 202311L #/ elif defined(__cplusplus) / #/ :TODO: if we assume C++11 we can use `<type_traits>` to implement them. / #else # / intentionally leave them undefined / # / to make `#ifdef ckd_add` etc. work as intended. / # undef ckd_add # undef ckd_sub # undef ckd_mul # undef __STDC_VERSION_STDCKDINT_H__ #endif #endif / RBIMPL_STDCKDINT_H */ Back

Edit File : stdckdint.h | Size : 2.68 KB

#ifndef RBIMPL_STDCKDINT_H                           /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_STDCKDINT_H
/**
 * @author     Ruby developers <ruby-core@ruby-lang.org>
 * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
 *             Permission  is hereby  granted,  to  either redistribute  and/or
 *             modify this file, provided that  the conditions mentioned in the
 *             file COPYING are met.  Consult the file for details.
 * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
 *             implementation details.   Don't take  them as canon.  They could
 *             rapidly appear then vanish.  The name (path) of this header file
 *             is also an  implementation detail.  Do not expect  it to persist
 *             at the place it is now.  Developers are free to move it anywhere
 *             anytime at will.
 * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
 *             recursively included  from extension  libraries written  in C++.
 *             Do not  expect for  instance `__VA_ARGS__` is  always available.
 *             We assume C99  for ruby itself but we don't  assume languages of
 *             extension libraries.  They could be written in C++98.
 * @brief      C23 shim for <stdckdint.h>
 */
#include "ruby/internal/config.h"
#include "ruby/internal/cast.h"
#include "ruby/internal/has/builtin.h"
#include "ruby/internal/stdbool.h"

#ifdef __has_include
# if __has_include(<stdckdint.h>)
#  /* Conforming C23 situation; e.g. recent clang */
#  define RBIMPL_HAVE_STDCKDINT_H
# endif
#endif

#ifdef HAVE_STDCKDINT_H
# /* Some OSes (most notably FreeBSD) have this file. */
# define RBIMPL_HAVE_STDCKDINT_H
#endif

#ifdef __cplusplus
# /* It seems OS/Compiler provided stdckdint.h tend not support C++ yet.
#  * Situations could improve someday but in a meantime let us work around.
#  */
# undef RBIMPL_HAVE_STDCKDINT_H
#endif

#ifdef RBIMPL_HAVE_STDCKDINT_H
# /* Take that. */
# include <stdckdint.h>

#elif RBIMPL_HAS_BUILTIN(__builtin_add_overflow)
# define ckd_add(x, y, z) RBIMPL_CAST((bool)__builtin_add_overflow((y), (z), (x)))
# define ckd_sub(x, y, z) RBIMPL_CAST((bool)__builtin_sub_overflow((y), (z), (x)))
# define ckd_mul(x, y, z) RBIMPL_CAST((bool)__builtin_mul_overflow((y), (z), (x)))
# define __STDC_VERSION_STDCKDINT_H__ 202311L

#/* elif defined(__cplusplus) */
#/* :TODO: if we assume C++11 we can use `<type_traits>` to implement them. */

#else
# /* intentionally leave them undefined */
# /* to make `#ifdef ckd_add` etc. work as intended. */
# undef ckd_add
# undef ckd_sub
# undef ckd_mul
# undef __STDC_VERSION_STDCKDINT_H__
#endif

#endif /* RBIMPL_STDCKDINT_H */

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