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/*===---- limits.h - Standard header for integer sizes --------------------===*\
*
* Copyright (c) 2009 Chris Lattner
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
\*===----------------------------------------------------------------------===*/
#ifndef __CLANG_LIMITS_H
#define __CLANG_LIMITS_H
/* The system's limits.h may, in turn, try to #include_next GCC's limits.h.
Avert this #include_next madness. */
#if defined __GNUC__ && !defined _GCC_LIMITS_H_
#define _GCC_LIMITS_H_
#endif
/* System headers include a number of constants from POSIX in <limits.h>.
Include it if we're hosted. */
#if __STDC_HOSTED__ && \
defined(__has_include_next) && __has_include_next(<limits.h>)
#include_next <limits.h>
#endif
/* Many system headers try to "help us out" by defining these. No really, we
know how big each datatype is. */
#undef SCHAR_MIN
#undef SCHAR_MAX
#undef UCHAR_MAX
#undef SHRT_MIN
#undef SHRT_MAX
#undef USHRT_MAX
#undef INT_MIN
#undef INT_MAX
#undef UINT_MAX
#undef LONG_MIN
#undef LONG_MAX
#undef ULONG_MAX
#undef WCHAR_MIN
#undef WCHAR_MAX
#undef CHAR_BIT
#undef CHAR_MIN
#undef CHAR_MAX
/* C90/99 5.2.4.2.1 */
#define SCHAR_MAX __SCHAR_MAX__
#define SHRT_MAX __SHRT_MAX__
#define INT_MAX __INT_MAX__
#define LONG_MAX __LONG_MAX__
#define WCHAR_MAX __WCHAR_MAX__
#define SCHAR_MIN (-__SCHAR_MAX__-1)
#define SHRT_MIN (-__SHRT_MAX__ -1)
#define INT_MIN (-__INT_MAX__ -1)
#define LONG_MIN (-__LONG_MAX__ -1L)
#define UCHAR_MAX (__SCHAR_MAX__*2 +1)
#define USHRT_MAX (__SHRT_MAX__ *2 +1)
#define UINT_MAX (__INT_MAX__ *2U +1U)
#define ULONG_MAX (__LONG_MAX__ *2UL+1UL)
#ifndef MB_LEN_MAX
#define MB_LEN_MAX 1
#endif
#define CHAR_BIT __CHAR_BIT__
#ifdef __CHAR_UNSIGNED__ /* -funsigned-char */
#define CHAR_MIN 0
#define CHAR_MAX UCHAR_MAX
#else
#define CHAR_MIN SCHAR_MIN
#define CHAR_MAX __SCHAR_MAX__
#endif
/* C++ or C99: Added wchar_t */
#if defined(__cplusplus) || __STDC_VERSION__ >= 199901
#ifdef __WCHAR_UNSIGNED__
#define WCHAR_MIN 0
#else
#define WCHAR_MIN (-__WCHAR_MAX__-1)
#endif
#endif
/* C99 5.2.4.2.1: Added long long. */
#if __STDC_VERSION__ >= 199901
#undef LLONG_MIN
#undef LLONG_MAX
#undef ULLONG_MAX
#define LLONG_MAX __LONG_LONG_MAX__
#define LLONG_MIN (-__LONG_LONG_MAX__-1LL)
#define ULLONG_MAX (__LONG_LONG_MAX__*2ULL+1ULL)
#endif
/* LONG_LONG_MIN/LONG_LONG_MAX/ULONG_LONG_MAX are a GNU extension. It's too bad
that we don't have something like #pragma poison that could be used to
deprecate a macro - the code should just use LLONG_MAX and friends.
*/
#if defined(__GNU_LIBRARY__) ? defined(__USE_GNU) : !defined(__STRICT_ANSI__)
#undef LONG_LONG_MIN
#undef LONG_LONG_MAX
#undef ULONG_LONG_MAX
#define LONG_LONG_MAX __LONG_LONG_MAX__
#define LONG_LONG_MIN (-__LONG_LONG_MAX__-1LL)
#define ULONG_LONG_MAX (__LONG_LONG_MAX__*2ULL+1ULL)
#endif
#endif /* __CLANG_LIMITS_H */
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