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ruby--ruby/include/ruby/backward/2/limits.h

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add #include guard hack According to MSVC manual (*1), cl.exe can skip including a header file when that: - contains #pragma once, or - starts with #ifndef, or - starts with #if ! defined. GCC has a similar trick (*2), but it acts more stricter (e. g. there must be _no tokens_ outside of #ifndef...#endif). Sun C lacked #pragma once for a looong time. Oracle Developer Studio 12.5 finally implemented it, but we cannot assume such recent version. This changeset modifies header files so that each of them include strictly one #ifndef...#endif. I believe this is the most portable way to trigger compiler optimizations. [Bug #16770] *1: https://docs.microsoft.com/en-us/cpp/preprocessor/once *2: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html
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#ifndef RUBY_BACKWARD2_LIMITS_H /*-*-C++-*-vi:se ft=cpp:*/
#define RUBY_BACKWARD2_LIMITS_H
/**
Merge pull request #2991 from shyouhei/ruby.h Split ruby.h
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* @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.
sed -i s/ruby3/rbimpl/g
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* @warning Symbols prefixed with either `RBIMPL` or `rbimpl` are
Merge pull request #2991 from shyouhei/ruby.h Split ruby.h
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* 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
sed -i 's/. They/. They/' Truly editorial fix for comments. This works better with Emacs' set-justification-full function. [ci skip]
2021-01-14 01:00:54 -05:00
* extension libraries. They could be written in C++98.
Merge pull request #2991 from shyouhei/ruby.h Split ruby.h
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* @brief Historical shim for `<limits.h>`.
*
* The macros in this header file are obsolescent. Does anyone really need our
include/ruby/backward/2/limits.h: skip doxygen For instane CHAR_BIT is an ANSI C macro which should be documented in other places than Ruby (and the definition in this file must work exactly identical to that of standard one). [ci skip]
2021-06-07 01:46:28 -04:00
* own definition of `CHAR_BIT` today?
Merge pull request #2991 from shyouhei/ruby.h Split ruby.h
2020-04-08 00:28:13 -04:00
*/
sed -i 's|ruby/impl|ruby/internal|' To fix build failures.
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#include "ruby/internal/config.h"
Merge pull request #2991 from shyouhei/ruby.h Split ruby.h
2020-04-08 00:28:13 -04:00
#ifdef HAVE_LIMITS_H
# include <limits.h>
#endif
#include "ruby/backward/2/long_long.h"
#ifndef LONG_MAX
# /* assuming 32bit(2's complement) long */
# define LONG_MAX 2147483647L
#endif
#ifndef LONG_MIN
# define LONG_MIN (-LONG_MAX-1)
#endif
#ifndef CHAR_BIT
# define CHAR_BIT 8
#endif
#ifdef LLONG_MAX
# /* Take that. */
#elif defined(LONG_LONG_MAX)
# define LLONG_MAX LONG_LONG_MAX
#elif defined(_I64_MAX)
# define LLONG_MAX _I64_MAX
#else
# /* assuming 64bit(2's complement) long long */
# define LLONG_MAX 9223372036854775807LL
#endif
#ifdef LLONG_MIN
# /* Take that. */
#elif defined(LONG_LONG_MIN)
# define LLONG_MIN LONG_LONG_MIN
#elif defined(_I64_MAX)
# define LLONG_MIN _I64_MIN
#else
# define LLONG_MIN (-LLONG_MAX-1)
#endif
#ifdef SIZE_MAX
# /* Take that. */
#elif SIZEOF_SIZE_T == SIZEOF_LONG_LONG
# define SIZE_MAX ULLONG_MAX
# define SIZE_MIN ULLONG_MIN
#elif SIZEOF_SIZE_T == SIZEOF_LONG
# define SIZE_MAX ULONG_MAX
# define SIZE_MIN ULONG_MIN
#elif SIZEOF_SIZE_T == SIZEOF_INT
# define SIZE_MAX UINT_MAX
# define SIZE_MIN UINT_MIN
#else
# define SIZE_MAX USHRT_MAX
# define SIZE_MIN USHRT_MIN
#endif
#ifdef SSIZE_MAX
# /* Take that. */
#elif SIZEOF_SIZE_T == SIZEOF_LONG_LONG
# define SSIZE_MAX LLONG_MAX
# define SSIZE_MIN LLONG_MIN
#elif SIZEOF_SIZE_T == SIZEOF_LONG
# define SSIZE_MAX LONG_MAX
# define SSIZE_MIN LONG_MIN
#elif SIZEOF_SIZE_T == SIZEOF_INT
# define SSIZE_MAX INT_MAX
# define SSIZE_MIN INT_MIN
#else
# define SSIZE_MAX SHRT_MAX
# define SSIZE_MIN SHRT_MIN
#endif
add #include guard hack According to MSVC manual (*1), cl.exe can skip including a header file when that: - contains #pragma once, or - starts with #ifndef, or - starts with #if ! defined. GCC has a similar trick (*2), but it acts more stricter (e. g. there must be _no tokens_ outside of #ifndef...#endif). Sun C lacked #pragma once for a looong time. Oracle Developer Studio 12.5 finally implemented it, but we cannot assume such recent version. This changeset modifies header files so that each of them include strictly one #ifndef...#endif. I believe this is the most portable way to trigger compiler optimizations. [Bug #16770] *1: https://docs.microsoft.com/en-us/cpp/preprocessor/once *2: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html
2020-04-10 01:11:40 -04:00
#endif /* RUBY_BACKWARD2_LIMITS_H */
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