/*===---- 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 … #define SHRT_MAX … #define INT_MAX … #define LONG_MAX … #define SCHAR_MIN … #define SHRT_MIN … #define INT_MIN … #define LONG_MIN … #define UCHAR_MAX … #if __SHRT_WIDTH__ < __INT_WIDTH__ #define USHRT_MAX … #else #define USHRT_MAX … #endif #define UINT_MAX … #define ULONG_MAX … #ifndef MB_LEN_MAX #define MB_LEN_MAX … #endif #define CHAR_BIT … /* C23 5.2.4.2.1 */ #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L #define BOOL_WIDTH … #define CHAR_WIDTH … #define SCHAR_WIDTH … #define UCHAR_WIDTH … #define USHRT_WIDTH … #define SHRT_WIDTH … #define UINT_WIDTH … #define INT_WIDTH … #define ULONG_WIDTH … #define LONG_WIDTH … #define ULLONG_WIDTH … #define LLONG_WIDTH … #define BITINT_MAXWIDTH … #endif #ifdef __CHAR_UNSIGNED__ /* -funsigned-char */ #define CHAR_MIN … #define CHAR_MAX … #else #define CHAR_MIN … #define CHAR_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 … #define LLONG_MIN … #define ULLONG_MAX … #endif /* LONG_LONG_MIN/LONG_LONG_MAX/ULONG_LONG_MAX are a GNU extension. 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__) #undef LONG_LONG_MIN #undef LONG_LONG_MAX #undef ULONG_LONG_MAX #define LONG_LONG_MAX … #define LONG_LONG_MIN … #define ULONG_LONG_MAX … #endif #endif /* __MVS__ */ #endif /* __CLANG_LIMITS_H */
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