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Diffstat (limited to 'limits.h')
| -rw-r--r-- | limits.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/limits.h b/limits.h new file mode 100644 index 0000000000..15ff7d1d83 --- /dev/null +++ b/limits.h @@ -0,0 +1,112 @@ +/* Copyright (C) 1991, 1992 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +/* + * ANSI Standard: 4.14/2.2.4.2 Limits of integral types <limits.h> + */ + +#include <features.h> + +#ifdef __USE_POSIX +/* POSIX adds things to <limits.h>. */ +#include <posix1_lim.h> +#endif + +#ifdef __USE_POSIX2 +#include <posix2_lim.h> +#endif + + +#if __GNUC__ >= 2 + + /* Get the compiler's limits.h, which defines all the ANSI constants. */ + #ifndef _LIBC_LIMITS_H_ + #define _LIBC_LIMITS_H_ /* This tells it not to look for another. */ + #endif + #ifndef _GCC_LIMITS_H_ /* This is what GCC's file defines. */ + #include_next <limits.h> + #endif + +#else /* Not GCC 2. */ + +/* We only protect from multiple inclusion here, because all the other + #include's protect themselves, and in GCC 2 we may #include_next through + multiple copies of this file before we get to GCC's. */ +#ifndef _LIMITS_H +#define _LIMITS_H + +/* We don't have #include_next. + Define ANSI <limits.h> for standard 32-bit words. */ + +/* These assume 8-bit `char's, 16-bit `short int's, + and 32-bit `int's and `long int's. */ + +/* Number of bits in a `char'. */ +#define CHAR_BIT 8 + +/* Maximum length of any multibyte character in any locale. + Locale-writers should change this as necessary. */ +#define MB_LEN_MAX 1 + +/* Minimum and maximum values a `signed char' can hold. */ +#define SCHAR_MIN (-128) +#define SCHAR_MAX 127 + +/* Maximum value an `unsigned char' can hold. (Minimum is 0.) */ +#ifdef __STDC__ +#define UCHAR_MAX 255U +#else +#define UCHAR_MAX 255 +#endif + +/* Minimum and maximum values a `char' can hold. */ +#ifdef __CHAR_UNSIGNED__ +#define CHAR_MIN 0 +#define CHAR_MAX UCHAR_MAX +#else +#define CHAR_MIN SCHAR_MIN +#define CHAR_MAX SCHAR_MAX +#endif + +/* Minimum and maximum values a `signed short int' can hold. */ +#define SHRT_MIN (-32768) +#define SHRT_MAX 32767 + +/* Maximum value an `unsigned short int' can hold. (Minimum is 0.) */ +#define USHRT_MAX 65535 + +/* Minimum and maximum values a `signed int' can hold. */ +#define INT_MIN (- INT_MAX - 1) +#define INT_MAX 2147483647 + +/* Maximum value an `unsigned int' can hold. (Minimum is 0.) */ +#ifdef __STDC__ +#define UINT_MAX 4294967295U +#else +#define UINT_MAX 4294967295 +#endif + +/* Minimum and maximum values a `signed long int' can hold. */ +#define LONG_MIN INT_MIN +#define LONG_MAX INT_MAX + +/* Maximum value an `unsigned long int' can hold. (Minimum is 0.) */ +#define ULONG_MAX UINT_MAX + +#endif /* limits.h */ +#endif /* GCC 2. */ |