-/* Copyright (C) 1991, 1992, 1996, 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2022 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.
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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.
+ Lesser 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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
/*
- * ISO C Standard: 4.14/2.2.4.2 Limits of integral types <limits.h>
+ * ISO C99 Standard: 7.10/5.2.4.2.1 Sizes of integer types <limits.h>
*/
#ifndef _LIBC_LIMITS_H_
#define _LIBC_LIMITS_H_ 1
-#include <features.h>
+#define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
+#include <bits/libc-header-start.h>
-#ifdef __USE_POSIX
-/* POSIX adds things to <limits.h>. */
-# include <bits/posix1_lim.h>
-#endif
-#ifdef __USE_POSIX2
-# include <bits/posix2_lim.h>
-#endif
+/* Maximum length of any multibyte character in any locale.
+ We define this value here since the gcc header does not define
+ the correct value. */
+#define MB_LEN_MAX 16
-#ifdef __USE_XOPEN
-# include <bits/xopen_lim.h>
-#endif
-
-#if __GNUC__ >= 2
-
- /* Get the compiler's limits.h, which defines all the ANSI constants. */
-# ifndef _GCC_LIMITS_H_ /* This is what GCC's file defines. */
-# include_next <limits.h>
-# endif
-
-#else /* Not GCC 2. */
+/* If we are not using GNU CC we have to define all the symbols ourself.
+ Otherwise use gcc's definitions (see below). */
+#if !defined __GNUC__ || __GNUC__ < 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
# ifndef _LIMITS_H
# define _LIMITS_H 1
+#include <bits/wordsize.h>
+
/* We don't have #include_next.
Define ANSI <limits.h> for standard 32-bit words. */
/* Number of bits in a `char'. */
# define CHAR_BIT 8
-/* Maximum length of any multibyte character in any locale. */
-# define MB_LEN_MAX 6
-
/* Minimum and maximum values a `signed char' can hold. */
# define SCHAR_MIN (-128)
# define SCHAR_MAX 127
# 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
+# define UINT_MAX 4294967295U
/* Minimum and maximum values a `signed long int' can hold. */
-# ifdef __alpha__
+# if __WORDSIZE == 64
# define LONG_MAX 9223372036854775807L
# else
# define LONG_MAX 2147483647L
# define LONG_MIN (-LONG_MAX - 1L)
/* Maximum value an `unsigned long int' can hold. (Minimum is 0.) */
-# ifdef __alpha__
+# if __WORDSIZE == 64
# define ULONG_MAX 18446744073709551615UL
# else
-# ifdef __STDC__
-# define ULONG_MAX 4294967295UL
-# else
-# define ULONG_MAX 4294967295L
-# endif
+# define ULONG_MAX 4294967295UL
# endif
+# ifdef __USE_ISOC99
+
+/* Minimum and maximum values a `signed long long int' can hold. */
+# define LLONG_MAX 9223372036854775807LL
+# define LLONG_MIN (-LLONG_MAX - 1LL)
+
+/* Maximum value an `unsigned long long int' can hold. (Minimum is 0.) */
+# define ULLONG_MAX 18446744073709551615ULL
+
+# endif /* ISO C99 */
+
# endif /* limits.h */
#endif /* GCC 2. */
#endif /* !_LIBC_LIMITS_H_ */
+
+ /* Get the compiler's limits.h, which defines almost all the ISO constants.
+
+ We put this #include_next outside the double inclusion check because
+ it should be possible to include this file more than once and still get
+ the definitions from gcc's header. */
+#if defined __GNUC__ && !defined _GCC_LIMITS_H_
+/* `_GCC_LIMITS_H_' is what GCC's file defines. */
+# include_next <limits.h>
+#endif
+
+/* The <limits.h> files in some gcc versions don't define LLONG_MIN,
+ LLONG_MAX, and ULLONG_MAX. Instead only the values gcc defined for
+ ages are available. */
+#if defined __USE_ISOC99 && defined __GNUC__
+# ifndef LLONG_MIN
+# define LLONG_MIN (-LLONG_MAX-1)
+# endif
+# ifndef LLONG_MAX
+# define LLONG_MAX __LONG_LONG_MAX__
+# endif
+# ifndef ULLONG_MAX
+# define ULLONG_MAX (LLONG_MAX * 2ULL + 1)
+# endif
+#endif
+
+/* The integer width macros are not defined by GCC's <limits.h> before
+ GCC 7, or if _GNU_SOURCE rather than
+ __STDC_WANT_IEC_60559_BFP_EXT__ is used to enable this feature. */
+#if __GLIBC_USE (IEC_60559_BFP_EXT_C2X)
+# ifndef CHAR_WIDTH
+# define CHAR_WIDTH 8
+# endif
+# ifndef SCHAR_WIDTH
+# define SCHAR_WIDTH 8
+# endif
+# ifndef UCHAR_WIDTH
+# define UCHAR_WIDTH 8
+# endif
+# ifndef SHRT_WIDTH
+# define SHRT_WIDTH 16
+# endif
+# ifndef USHRT_WIDTH
+# define USHRT_WIDTH 16
+# endif
+# ifndef INT_WIDTH
+# define INT_WIDTH 32
+# endif
+# ifndef UINT_WIDTH
+# define UINT_WIDTH 32
+# endif
+# ifndef LONG_WIDTH
+# define LONG_WIDTH __WORDSIZE
+# endif
+# ifndef ULONG_WIDTH
+# define ULONG_WIDTH __WORDSIZE
+# endif
+# ifndef LLONG_WIDTH
+# define LLONG_WIDTH 64
+# endif
+# ifndef ULLONG_WIDTH
+# define ULLONG_WIDTH 64
+# endif
+#endif /* Use IEC_60559_BFP_EXT. */
+
+/* The macros for _Bool are not defined by GCC's <limits.h> before GCC
+ 11, or if _GNU_SOURCE is defined rather than enabling C2x support
+ with -std. */
+#if __GLIBC_USE (ISOC2X)
+# ifndef BOOL_MAX
+# define BOOL_MAX 1
+# endif
+# ifndef BOOL_WIDTH
+# define BOOL_WIDTH 1
+# endif
+#endif
+
+#ifdef __USE_POSIX
+/* POSIX adds things to <limits.h>. */
+# include <bits/posix1_lim.h>
+#endif
+
+#ifdef __USE_POSIX2
+# include <bits/posix2_lim.h>
+#endif
+
+#ifdef __USE_XOPEN
+# include <bits/xopen_lim.h>
+#endif
projects / thirdparty / glibc.git / blobdiff