1 /* Copyright (C) 1991, 1992, 1996, 1997, 1998, 1999, 2000, 2005 2 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, write to the Free 17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 18 02111-1307 USA. */ 19 20 /* 21 * ISO C99 Standard: 7.10/5.2.4.2.1 Sizes of integer types <limits.h> 22 */ 23 24 #ifndef _LIBC_LIMITS_H_ 25 #define _LIBC_LIMITS_H_ 1 26 27 #include <features.h> 28 29 30 /* Maximum length of any multibyte character in any locale. 31 We define this value here since the gcc header does not define 32 the correct value. */ 33 #define MB_LEN_MAX 16 34 35 36 /* If we are not using GNU CC we have to define all the symbols ourself. 37 Otherwise use gcc's definitions (see below). */ 38 #if !defined __GNUC__ || __GNUC__ < 2 39 40 /* We only protect from multiple inclusion here, because all the other 41 #include's protect themselves, and in GCC 2 we may #include_next through 42 multiple copies of this file before we get to GCC's. */ 43 # ifndef _LIMITS_H 44 # define _LIMITS_H 1 45 46 #include <bits/wordsize.h> 47 48 /* We don't have #include_next. 49 Define ANSI <limits.h> for standard 32-bit words. */ 50 51 /* These assume 8-bit `char's, 16-bit `short int's, 52 and 32-bit `int's and `long int's. */ 53 54 /* Number of bits in a `char'. */ 55 # define CHAR_BIT 8 56 57 /* Minimum and maximum values a `signed char' can hold. */ 58 # define SCHAR_MIN (-128) 59 # define SCHAR_MAX 127 60 61 /* Maximum value an `unsigned char' can hold. (Minimum is 0.) */ 62 # define UCHAR_MAX 255 63 64 /* Minimum and maximum values a `char' can hold. */ 65 # ifdef __CHAR_UNSIGNED__ 66 # define CHAR_MIN 0 67 # define CHAR_MAX UCHAR_MAX 68 # else 69 # define CHAR_MIN SCHAR_MIN 70 # define CHAR_MAX SCHAR_MAX 71 # endif 72 73 /* Minimum and maximum values a `signed short int' can hold. */ 74 # define SHRT_MIN (-32768) 75 # define SHRT_MAX 32767 76 77 /* Maximum value an `unsigned short int' can hold. (Minimum is 0.) */ 78 # define USHRT_MAX 65535 79 80 /* Minimum and maximum values a `signed int' can hold. */ 81 # define INT_MIN (-INT_MAX - 1) 82 # define INT_MAX 2147483647 83 84 /* Maximum value an `unsigned int' can hold. (Minimum is 0.) */ 85 # define UINT_MAX 4294967295U 86 87 /* Minimum and maximum values a `signed long int' can hold. */ 88 # if __WORDSIZE == 64 89 # define LONG_MAX 9223372036854775807L 90 # else 91 # define LONG_MAX 2147483647L 92 # endif 93 # define LONG_MIN (-LONG_MAX - 1L) 94 95 /* Maximum value an `unsigned long int' can hold. (Minimum is 0.) */ 96 # if __WORDSIZE == 64 97 # define ULONG_MAX 18446744073709551615UL 98 # else 99 # define ULONG_MAX 4294967295UL 100 # endif 101 102 # ifdef __USE_ISOC99 103 104 /* Minimum and maximum values a `signed long long int' can hold. */ 105 # define LLONG_MAX 9223372036854775807LL 106 # define LLONG_MIN (-LLONG_MAX - 1LL) 107 108 /* Maximum value an `unsigned long long int' can hold. (Minimum is 0.) */ 109 # define ULLONG_MAX 18446744073709551615ULL 110 111 # endif /* ISO C99 */ 112 113 # endif /* limits.h */ 114 #endif /* GCC 2. */ 115 116 #endif /* !_LIBC_LIMITS_H_ */ 117 118 /* Get the compiler's limits.h, which defines almost all the ISO constants. 119 120 We put this #include_next outside the double inclusion check because 121 it should be possible to include this file more than once and still get 122 the definitions from gcc's header. */ 123 #if defined __GNUC__ && !defined _GCC_LIMITS_H_ 124 /* `_GCC_LIMITS_H_' is what GCC's file defines. */ 125 # include_next <limits.h> 126 #endif 127 128 /* The <limits.h> files in some gcc versions don't define LLONG_MIN, 129 LLONG_MAX, and ULLONG_MAX. Instead only the values gcc defined for 130 ages are available. */ 131 #if defined __USE_ISOC99 && defined __GNUC__ 132 # ifndef LLONG_MIN 133 # define LLONG_MIN (-LLONG_MAX-1) 134 # endif 135 # ifndef LLONG_MAX 136 # define LLONG_MAX __LONG_LONG_MAX__ 137 # endif 138 # ifndef ULLONG_MAX 139 # define ULLONG_MAX (LLONG_MAX * 2ULL + 1) 140 # endif 141 #endif 142 143 #ifdef __USE_POSIX 144 /* POSIX adds things to <limits.h>. */ 145 # include <bits/posix1_lim.h> 146 #endif 147 148 #ifdef __USE_POSIX2 149 # include <bits/posix2_lim.h> 150 #endif 151 152 #ifdef __USE_XOPEN 153 # include <bits/xopen_lim.h> 154 #endif 155
