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