Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

/*===---- limits.h - Standard header for integer sizes --------------------===*\

 *

 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

 * See https://llvm.org/LICENSE.txt for license information.

 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

 *

\*===----------------------------------------------------------------------===*/

#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__ && __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  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 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__

/* C2x 5.2.4.2.1 */

/* FIXME: This is using the placeholder dates Clang produces for these macros

   in C2x mode; switch to the correct values once they've been published. */

#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202000L

#define BOOL_WIDTH   __BOOL_WIDTH__

#define CHAR_WIDTH   CHAR_BIT

#define SCHAR_WIDTH  CHAR_BIT

#define UCHAR_WIDTH  CHAR_BIT

#define USHRT_WIDTH  __SHRT_WIDTH__

#define SHRT_WIDTH   __SHRT_WIDTH__

#define UINT_WIDTH   __INT_WIDTH__

#define INT_WIDTH    __INT_WIDTH__

#define ULONG_WIDTH  __LONG_WIDTH__

#define LONG_WIDTH   __LONG_WIDTH__

#define ULLONG_WIDTH __LLONG_WIDTH__

#define LLONG_WIDTH  __LLONG_WIDTH__

#define BITINT_MAXWIDTH __BITINT_MAXWIDTH__

#endif

#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

/* C99 5.2.4.2.1: Added long long.

   C++11 18.3.3.2: same contents as the Standard C Library header <limits.h>.

 */

#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) ||              \

    (defined(__cplusplus) && __cplusplus >= 201103L)

#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 */