diff options
Diffstat (limited to 'clang/lib/Headers/limits.h')
| -rw-r--r-- | clang/lib/Headers/limits.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/clang/lib/Headers/limits.h b/clang/lib/Headers/limits.h new file mode 100644 index 0000000..ecd09a4 --- /dev/null +++ b/clang/lib/Headers/limits.h @@ -0,0 +1,117 @@ +/*===---- limits.h - Standard header for integer sizes --------------------===*\ + * + * Copyright (c) 2009 Chris Lattner + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * +\*===----------------------------------------------------------------------===*/ + +#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__ && \ + defined(__has_include_next) && __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. */ +#if __STDC_VERSION__ >= 199901 + +#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 */ |