1 /* Copyright (C) 1991-2015 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <http://www.gnu.org/licenses/>. */ 17 18 /* 19 * ISO C99 Standard: 7.10/5.2.4.2.1 Sizes of integer types <limits.h> 20 */ 21 22 #ifndef _LIBC_LIMITS_H_ 23 #define _LIBC_LIMITS_H_ 1 24 25 #include <features.h> 26 27 28 /* Maximum length of any multibyte character in any locale. 29 We define this value here since the gcc header does not define 30 the correct value. */ 31 #define MB_LEN_MAX 16 32 33 34 /* If we are not using GNU CC we have to define all the symbols ourself. 35 Otherwise use gcc's definitions (see below). */ 36 #if !defined __GNUC__ || __GNUC__ < 2 37 38 /* We only protect from multiple inclusion here, because all the other 39 #include's protect themselves, and in GCC 2 we may #include_next through 40 multiple copies of this file before we get to GCC's. */ 41 # ifndef _LIMITS_H 42 # define _LIMITS_H 1 43 44 #include <bits/wordsize.h> 45 46 /* We don't have #include_next. 47 Define ANSI <limits.h> for standard 32-bit words. */ 48 49 /* These assume 8-bit `char's, 16-bit `short int's, 50 and 32-bit `int's and `long int's. */ 51 52 /* Number of bits in a `char'. */ 53 # define CHAR_BIT 8 54 55 /* Minimum and maximum values a `signed char' can hold. */ 56 # define SCHAR_MIN (-128) 57 # define SCHAR_MAX 127 58 59 /* Maximum value an `unsigned char' can hold. (Minimum is 0.) */ 60 # define UCHAR_MAX 255 61 62 /* Minimum and maximum values a `char' can hold. */ 63 # ifdef __CHAR_UNSIGNED__ 64 # define CHAR_MIN 0 65 # define CHAR_MAX UCHAR_MAX 66 # else 67 # define CHAR_MIN SCHAR_MIN 68 # define CHAR_MAX SCHAR_MAX 69 # endif 70 71 /* Minimum and maximum values a `signed short int' can hold. */ 72 # define SHRT_MIN (-32768) 73 # define SHRT_MAX 32767 74 75 /* Maximum value an `unsigned short int' can hold. (Minimum is 0.) */ 76 # define USHRT_MAX 65535 77 78 /* Minimum and maximum values a `signed int' can hold. */ 79 # define INT_MIN (-INT_MAX - 1) 80 # define INT_MAX 2147483647 81 82 /* Maximum value an `unsigned int' can hold. (Minimum is 0.) */ 83 # define UINT_MAX 4294967295U 84 85 /* Minimum and maximum values a `signed long int' can hold. */ 86 # if __WORDSIZE == 64 87 # define LONG_MAX 9223372036854775807L 88 # else 89 # define LONG_MAX 2147483647L 90 # endif 91 # define LONG_MIN (-LONG_MAX - 1L) 92 93 /* Maximum value an `unsigned long int' can hold. (Minimum is 0.) */ 94 # if __WORDSIZE == 64 95 # define ULONG_MAX 18446744073709551615UL 96 # else 97 # define ULONG_MAX 4294967295UL 98 # endif 99 100 # ifdef __USE_ISOC99 101 102 /* Minimum and maximum values a `signed long long int' can hold. */ 103 # define LLONG_MAX 9223372036854775807LL 104 # define LLONG_MIN (-LLONG_MAX - 1LL) 105 106 /* Maximum value an `unsigned long long int' can hold. (Minimum is 0.) */ 107 # define ULLONG_MAX 18446744073709551615ULL 108 109 # endif /* ISO C99 */ 110 111 # endif /* limits.h */ 112 #endif /* GCC 2. */ 113 114 #endif /* !_LIBC_LIMITS_H_ */ 115 116 /* Get the compiler's limits.h, which defines almost all the ISO constants. 117 118 We put this #include_next outside the double inclusion check because 119 it should be possible to include this file more than once and still get 120 the definitions from gcc's header. */ 121 #if defined __GNUC__ && !defined _GCC_LIMITS_H_ 122 /* `_GCC_LIMITS_H_' is what GCC's file defines. */ 123 # include_next <limits.h> 124 #endif 125 126 /* The <limits.h> files in some gcc versions don't define LLONG_MIN, 127 LLONG_MAX, and ULLONG_MAX. Instead only the values gcc defined for 128 ages are available. */ 129 #if defined __USE_ISOC99 && defined __GNUC__ 130 # ifndef LLONG_MIN 131 # define LLONG_MIN (-LLONG_MAX-1) 132 # endif 133 # ifndef LLONG_MAX 134 # define LLONG_MAX __LONG_LONG_MAX__ 135 # endif 136 # ifndef ULLONG_MAX 137 # define ULLONG_MAX (LLONG_MAX * 2ULL + 1) 138 # endif 139 #endif 140 141 #ifdef __USE_POSIX 142 /* POSIX adds things to <limits.h>. */ 143 # include <bits/posix1_lim.h> 144 #endif 145 146 #ifdef __USE_POSIX2 147 # include <bits/posix2_lim.h> 148 #endif 149 150 #ifdef __USE_XOPEN 151 # include <bits/xopen_lim.h> 152 #endif 153