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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
downloadglibc-28f540f45bbacd939bfd07f213bcad2bf730b1bf.tar.gz
initial import
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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. */