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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /limits.h
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+/* 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.  */