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| 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__ && \ |
| 37 defined(__has_include_next) && __has_include_next(<limits.h>) |
| 38 #include_next <limits.h> |
| 39 #endif |
| 40 |
| 41 /* Many system headers try to "help us out" by defining these. No really, we |
| 42 know how big each datatype is. */ |
| 43 #undef SCHAR_MIN |
| 44 #undef SCHAR_MAX |
| 45 #undef UCHAR_MAX |
| 46 #undef SHRT_MIN |
| 47 #undef SHRT_MAX |
| 48 #undef USHRT_MAX |
| 49 #undef INT_MIN |
| 50 #undef INT_MAX |
| 51 #undef UINT_MAX |
| 52 #undef LONG_MIN |
| 53 #undef LONG_MAX |
| 54 #undef ULONG_MAX |
| 55 |
| 56 #undef CHAR_BIT |
| 57 #undef CHAR_MIN |
| 58 #undef CHAR_MAX |
| 59 |
| 60 /* C90/99 5.2.4.2.1 */ |
| 61 #define SCHAR_MAX __SCHAR_MAX__ |
| 62 #define SHRT_MAX __SHRT_MAX__ |
| 63 #define INT_MAX __INT_MAX__ |
| 64 #define LONG_MAX __LONG_MAX__ |
| 65 |
| 66 #define SCHAR_MIN (-__SCHAR_MAX__-1) |
| 67 #define SHRT_MIN (-__SHRT_MAX__ -1) |
| 68 #define INT_MIN (-__INT_MAX__ -1) |
| 69 #define LONG_MIN (-__LONG_MAX__ -1L) |
| 70 |
| 71 #define UCHAR_MAX (__SCHAR_MAX__*2 +1) |
| 72 #define USHRT_MAX (__SHRT_MAX__ *2 +1) |
| 73 #define UINT_MAX (__INT_MAX__ *2U +1U) |
| 74 #define ULONG_MAX (__LONG_MAX__ *2UL+1UL) |
| 75 |
| 76 #ifndef MB_LEN_MAX |
| 77 #define MB_LEN_MAX 1 |
| 78 #endif |
| 79 |
| 80 #define CHAR_BIT __CHAR_BIT__ |
| 81 |
| 82 #ifdef __CHAR_UNSIGNED__ /* -funsigned-char */ |
| 83 #define CHAR_MIN 0 |
| 84 #define CHAR_MAX UCHAR_MAX |
| 85 #else |
| 86 #define CHAR_MIN SCHAR_MIN |
| 87 #define CHAR_MAX __SCHAR_MAX__ |
| 88 #endif |
| 89 |
| 90 /* C99 5.2.4.2.1: Added long long. */ |
| 91 #if __STDC_VERSION__ >= 199901 |
| 92 |
| 93 #undef LLONG_MIN |
| 94 #undef LLONG_MAX |
| 95 #undef ULLONG_MAX |
| 96 |
| 97 #define LLONG_MAX __LONG_LONG_MAX__ |
| 98 #define LLONG_MIN (-__LONG_LONG_MAX__-1LL) |
| 99 #define ULLONG_MAX (__LONG_LONG_MAX__*2ULL+1ULL) |
| 100 #endif |
| 101 |
| 102 /* LONG_LONG_MIN/LONG_LONG_MAX/ULONG_LONG_MAX are a GNU extension. It's too bad |
| 103 that we don't have something like #pragma poison that could be used to |
| 104 deprecate a macro - the code should just use LLONG_MAX and friends. |
| 105 */ |
| 106 #if defined(__GNU_LIBRARY__) ? defined(__USE_GNU) : !defined(__STRICT_ANSI__) |
| 107 |
| 108 #undef LONG_LONG_MIN |
| 109 #undef LONG_LONG_MAX |
| 110 #undef ULONG_LONG_MAX |
| 111 |
| 112 #define LONG_LONG_MAX __LONG_LONG_MAX__ |
| 113 #define LONG_LONG_MIN (-__LONG_LONG_MAX__-1LL) |
| 114 #define ULONG_LONG_MAX (__LONG_LONG_MAX__*2ULL+1ULL) |
| 115 #endif |
| 116 |
| 117 #endif /* __CLANG_LIMITS_H */ |
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