| /*===---- 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 |
| |
| /* 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) |
| #define USHRT_MAX (__SHRT_MAX__ *2 +1) |
| #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__ |
| |
| #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 __STDC_VERSION__ >= 199901L || __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. 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 __LONG_LONG_MAX__ |
| #define LONG_LONG_MIN (-__LONG_LONG_MAX__-1LL) |
| #define ULONG_LONG_MAX (__LONG_LONG_MAX__*2ULL+1ULL) |
| #endif |
| |
| #endif /* __CLANG_LIMITS_H */ |
