2020-04-10 01:11:40 -04:00
|
|
|
#ifndef RUBY_BACKWARD2_LIMITS_H /*-*-C++-*-vi:se ft=cpp:*/
|
|
|
|
|
#define RUBY_BACKWARD2_LIMITS_H
|
|
|
|
|
/**
|
2020-04-08 00:28:13 -04:00
|
|
|
* @file
|
|
|
|
|
* @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.
|
2020-05-04 03:27:48 -04:00
|
|
|
* @warning Symbols prefixed with either `RBIMPL` or `rbimpl` are
|
2020-04-08 00:28:13 -04:00
|
|
|
* 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
|
2021-01-14 01:00:54 -05:00
|
|
|
* extension libraries. They could be written in C++98.
|
2020-04-08 00:28:13 -04:00
|
|
|
* @brief Historical shim for `<limits.h>`.
|
|
|
|
|
*
|
|
|
|
|
* The macros in this header file are obsolescent. Does anyone really need our
|
|
|
|
|
* own definition of #CHAR_BIT today?
|
|
|
|
|
*/
|
2020-05-08 05:31:09 -04:00
|
|
|
#include "ruby/internal/config.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
|
2020-04-10 01:11:40 -04:00
|
|
|
|
|
|
|
|
#endif /* RUBY_BACKWARD2_LIMITS_H */
|
