1/*===---- limits.h - Standard header for integer sizes --------------------===*\ 2 * 3 * Copyright (c) 2009 Chris Lattner 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a copy 6 * of this software and associated documentation files (the "Software"), to deal 7 * in the Software without restriction, including without limitation the rights 8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 * copies of the Software, and to permit persons to whom the Software is 10 * furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be included in 13 * all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 21 * THE SOFTWARE. 22 * 23\*===----------------------------------------------------------------------===*/ 24 25#ifndef __CLANG_LIMITS_H 26#define __CLANG_LIMITS_H 27 28/* The system's limits.h may, in turn, try to #include_next GCC's limits.h. 29 Avert this #include_next madness. */ 30#if defined __GNUC__ && !defined _GCC_LIMITS_H_ 31#define _GCC_LIMITS_H_ 32#endif 33 34/* System headers include a number of constants from POSIX in <limits.h>. 35 Include it if we're hosted. */ 36#if __STDC_HOSTED__ && __has_include_next(<limits.h>) 37#include_next <limits.h> 38#endif 39 40/* Many system headers try to "help us out" by defining these. No really, we 41 know how big each datatype is. */ 42#undef SCHAR_MIN 43#undef SCHAR_MAX 44#undef UCHAR_MAX 45#undef SHRT_MIN 46#undef SHRT_MAX 47#undef USHRT_MAX 48#undef INT_MIN 49#undef INT_MAX 50#undef UINT_MAX 51#undef LONG_MIN 52#undef LONG_MAX 53#undef ULONG_MAX 54 55#undef CHAR_BIT 56#undef CHAR_MIN 57#undef CHAR_MAX 58 59/* C90/99 5.2.4.2.1 */ 60#define SCHAR_MAX __SCHAR_MAX__ 61#define SHRT_MAX __SHRT_MAX__ 62#define INT_MAX __INT_MAX__ 63#define LONG_MAX __LONG_MAX__ 64 65#define SCHAR_MIN (-__SCHAR_MAX__-1) 66#define SHRT_MIN (-__SHRT_MAX__ -1) 67#define INT_MIN (-__INT_MAX__ -1) 68#define LONG_MIN (-__LONG_MAX__ -1L) 69 70#define UCHAR_MAX (__SCHAR_MAX__*2 +1) 71#define USHRT_MAX (__SHRT_MAX__ *2 +1) 72#define UINT_MAX (__INT_MAX__ *2U +1U) 73#define ULONG_MAX (__LONG_MAX__ *2UL+1UL) 74 75#ifndef MB_LEN_MAX 76#define MB_LEN_MAX 1 77#endif 78 79#define CHAR_BIT __CHAR_BIT__ 80 81#ifdef __CHAR_UNSIGNED__ /* -funsigned-char */ 82#define CHAR_MIN 0 83#define CHAR_MAX UCHAR_MAX 84#else 85#define CHAR_MIN SCHAR_MIN 86#define CHAR_MAX __SCHAR_MAX__ 87#endif 88 89/* C99 5.2.4.2.1: Added long long. 90 C++11 18.3.3.2: same contents as the Standard C Library header <limits.h>. 91 */ 92#if __STDC_VERSION__ >= 199901L || __cplusplus >= 201103L 93 94#undef LLONG_MIN 95#undef LLONG_MAX 96#undef ULLONG_MAX 97 98#define LLONG_MAX __LONG_LONG_MAX__ 99#define LLONG_MIN (-__LONG_LONG_MAX__-1LL) 100#define ULLONG_MAX (__LONG_LONG_MAX__*2ULL+1ULL) 101#endif 102 103/* LONG_LONG_MIN/LONG_LONG_MAX/ULONG_LONG_MAX are a GNU extension. It's too bad 104 that we don't have something like #pragma poison that could be used to 105 deprecate a macro - the code should just use LLONG_MAX and friends. 106 */ 107#if defined(__GNU_LIBRARY__) ? defined(__USE_GNU) : !defined(__STRICT_ANSI__) 108 109#undef LONG_LONG_MIN 110#undef LONG_LONG_MAX 111#undef ULONG_LONG_MAX 112 113#define LONG_LONG_MAX __LONG_LONG_MAX__ 114#define LONG_LONG_MIN (-__LONG_LONG_MAX__-1LL) 115#define ULONG_LONG_MAX (__LONG_LONG_MAX__*2ULL+1ULL) 116#endif 117 118#endif /* __CLANG_LIMITS_H */ 119