1 /*===---- limits.h - Standard header for integer sizes --------------------===*\
3 * Copyright (c) 2009 Chris Lattner
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:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
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
23 \*===----------------------------------------------------------------------===*/
25 #ifndef __CLANG_LIMITS_H
26 #define __CLANG_LIMITS_H
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_
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>
41 /* Many system headers try to "help us out" by defining these. No really, we
42 know how big each datatype is. */
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__
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)
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)
80 #define CHAR_BIT __CHAR_BIT__
82 #ifdef __CHAR_UNSIGNED__ /* -funsigned-char */
84 #define CHAR_MAX UCHAR_MAX
86 #define CHAR_MIN SCHAR_MIN
87 #define CHAR_MAX __SCHAR_MAX__
90 /* C99 5.2.4.2.1: Added long long. */
91 #if __STDC_VERSION__ >= 199901
97 #define LLONG_MAX __LONG_LONG_MAX__
98 #define LLONG_MIN (-__LONG_LONG_MAX__-1LL)
99 #define ULLONG_MAX (__LONG_LONG_MAX__*2ULL+1ULL)
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.
106 #if defined(__GNU_LIBRARY__) ? defined(__USE_GNU) : !defined(__STRICT_ANSI__)
110 #undef ULONG_LONG_MAX
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)
117 #endif /* __CLANG_LIMITS_H */