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_next <limits.h> 36 37 /* Many system headers try to "help us out" by defining these. No really, we 38 know how big each datatype is. */ 39 #undef SCHAR_MIN 40 #undef SCHAR_MAX 41 #undef UCHAR_MAX 42 #undef SHRT_MIN 43 #undef SHRT_MAX 44 #undef USHRT_MAX 45 #undef INT_MIN 46 #undef INT_MAX 47 #undef UINT_MAX 48 #undef LONG_MIN 49 #undef LONG_MAX 50 #undef ULONG_MAX 51 52 #undef CHAR_BIT 53 #undef CHAR_MIN 54 #undef CHAR_MAX 55 56 /* C90/99 5.2.4.2.1 */ 57 #define SCHAR_MAX __SCHAR_MAX__ 58 #define SHRT_MAX __SHRT_MAX__ 59 #define INT_MAX __INT_MAX__ 60 #define LONG_MAX __LONG_MAX__ 61 62 #define SCHAR_MIN (-__SCHAR_MAX__-1) 63 #define SHRT_MIN (-__SHRT_MAX__ -1) 64 #define INT_MIN (-__INT_MAX__ -1) 65 #define LONG_MIN (-__LONG_MAX__ -1L) 66 67 #define UCHAR_MAX (__SCHAR_MAX__*2 +1) 68 #define USHRT_MAX (__SHRT_MAX__ *2 +1) 69 #define UINT_MAX (__INT_MAX__ *2U +1U) 70 #define ULONG_MAX (__LONG_MAX__ *2UL+1UL) 71 72 #ifndef MB_LEN_MAX 73 #define MB_LEN_MAX 1 74 #endif 75 76 #define CHAR_BIT __CHAR_BIT__ 77 78 #ifdef __CHAR_UNSIGNED__ /* -funsigned-char */ 79 #define CHAR_MIN 0 80 #define CHAR_MAX UCHAR_MAX 81 #else 82 #define CHAR_MIN SCHAR_MIN 83 #define CHAR_MAX __SCHAR_MAX__ 84 #endif 85 86 /* C99 5.2.4.2.1: Added long long. */ 87 #if __STDC_VERSION__ >= 199901 88 89 #undef LLONG_MIN 90 #undef LLONG_MAX 91 #undef ULLONG_MAX 92 93 #define LLONG_MAX __LONG_LONG_MAX__ 94 #define LLONG_MIN (-__LONG_LONG_MAX__-1LL) 95 #define ULLONG_MAX (__LONG_LONG_MAX__*2ULL+1ULL) 96 #endif 97 98 /* LONG_LONG_MIN/LONG_LONG_MAX/ULONG_LONG_MAX are a GNU extension. It's too bad 99 that we don't have something like #pragma poison that could be used to 100 deprecate a macro - the code should just use LLONG_MAX and friends. 101 */ 102 #if defined(__GNU_LIBRARY__) ? defined(__USE_GNU) : !defined(__STRICT_ANSI__) 103 104 #undef LONG_LONG_MIN 105 #undef LONG_LONG_MAX 106 #undef ULONG_LONG_MAX 107 108 #define LONG_LONG_MAX __LONG_LONG_MAX__ 109 #define LONG_LONG_MIN (-__LONG_LONG_MAX__-1LL) 110 #define ULONG_LONG_MAX (__LONG_LONG_MAX__*2ULL+1ULL) 111 #endif 112 113 #endif /* __CLANG_LIMITS_H */ 114
