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limits.h
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/*===---- limits.h - Standard header for integer sizes --------------------===*\ * * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. * See https://llvm.org/LICENSE.txt for license information. * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception * \*===----------------------------------------------------------------------===*/ #ifndef __CLANG_LIMITS_H #define __CLANG_LIMITS_H #if defined(__MVS__) && __has_include_next(<limits.h>) #include_next <limits.h> #else /* The system's limits.h may, in turn, try to #include_next GCC's limits.h. Avert this #include_next madness. */ #if defined __GNUC__ && !defined _GCC_LIMITS_H_ #define _GCC_LIMITS_H_ #endif /* System headers include a number of constants from POSIX in <limits.h>. Include it if we're hosted. */ #if __STDC_HOSTED__ && __has_include_next(<limits.h>) #include_next <limits.h> #endif /* Many system headers try to "help us out" by defining these. No really, we know how big each datatype is. */ #undef SCHAR_MIN #undef SCHAR_MAX #undef UCHAR_MAX #undef SHRT_MIN #undef SHRT_MAX #undef USHRT_MAX #undef INT_MIN #undef INT_MAX #undef UINT_MAX #undef LONG_MIN #undef LONG_MAX #undef ULONG_MAX #undef CHAR_BIT #undef CHAR_MIN #undef CHAR_MAX /* C90/99 5.2.4.2.1 */ #define SCHAR_MAX __SCHAR_MAX__ #define SHRT_MAX __SHRT_MAX__ #define INT_MAX __INT_MAX__ #define LONG_MAX __LONG_MAX__ #define SCHAR_MIN (-__SCHAR_MAX__-1) #define SHRT_MIN (-__SHRT_MAX__ -1) #define INT_MIN (-__INT_MAX__ -1) #define LONG_MIN (-__LONG_MAX__ -1L) #define UCHAR_MAX (__SCHAR_MAX__*2 +1) #if __SHRT_WIDTH__ < __INT_WIDTH__ #define USHRT_MAX (__SHRT_MAX__ * 2 + 1) #else #define USHRT_MAX (__SHRT_MAX__ * 2U + 1U) #endif #define UINT_MAX (__INT_MAX__ *2U +1U) #define ULONG_MAX (__LONG_MAX__ *2UL+1UL) #ifndef MB_LEN_MAX #define MB_LEN_MAX 1 #endif #define CHAR_BIT __CHAR_BIT__ /* C23 5.2.4.2.1 */ #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L #define BOOL_WIDTH __BOOL_WIDTH__ #define CHAR_WIDTH CHAR_BIT #define SCHAR_WIDTH CHAR_BIT #define UCHAR_WIDTH CHAR_BIT #define USHRT_WIDTH __SHRT_WIDTH__ #define SHRT_WIDTH __SHRT_WIDTH__ #define UINT_WIDTH __INT_WIDTH__ #define INT_WIDTH __INT_WIDTH__ #define ULONG_WIDTH __LONG_WIDTH__ #define LONG_WIDTH __LONG_WIDTH__ #define ULLONG_WIDTH __LLONG_WIDTH__ #define LLONG_WIDTH __LLONG_WIDTH__ #define BITINT_MAXWIDTH __BITINT_MAXWIDTH__ #endif #ifdef __CHAR_UNSIGNED__ /* -funsigned-char */ #define CHAR_MIN 0 #define CHAR_MAX UCHAR_MAX #else #define CHAR_MIN SCHAR_MIN #define CHAR_MAX __SCHAR_MAX__ #endif /* C99 5.2.4.2.1: Added long long. C++11 18.3.3.2: same contents as the Standard C Library header <limits.h>. */ #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \ (defined(__cplusplus) && __cplusplus >= 201103L) #undef LLONG_MIN #undef LLONG_MAX #undef ULLONG_MAX #define LLONG_MAX __LONG_LONG_MAX__ #define LLONG_MIN (-__LONG_LONG_MAX__-1LL) #define ULLONG_MAX (__LONG_LONG_MAX__*2ULL+1ULL) #endif /* LONG_LONG_MIN/LONG_LONG_MAX/ULONG_LONG_MAX are a GNU extension. Android's bionic also defines them. It's too bad that we don't have something like #pragma poison that could be used to deprecate a macro - the code should just use LLONG_MAX and friends. */ #if (defined(__GNU_LIBRARY__) ? defined(__USE_GNU) \ : !defined(__STRICT_ANSI__)) || \ defined(__BIONIC__) #undef LONG_LONG_MIN #undef LONG_LONG_MAX #undef ULONG_LONG_MAX #define LONG_LONG_MAX __LONG_LONG_MAX__ #define LONG_LONG_MIN (-__LONG_LONG_MAX__-1LL) #define ULONG_LONG_MAX (__LONG_LONG_MAX__*2ULL+1ULL) #endif #endif /* __MVS__ */ #endif /* __CLANG_LIMITS_H */