fnmatch: work around GCC compiler warning bug with uninit var
[glibc.git] / include / limits.h
blob311386a23b4427f75e134103d5a64e73bd83e7cd
1 /* Copyright (C) 1991-2014 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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/>. */
19 * ISO C99 Standard: 7.10/5.2.4.2.1 Sizes of integer types <limits.h>
22 #ifndef _LIBC_LIMITS_H_
23 #define _LIBC_LIMITS_H_ 1
25 #include <features.h>
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
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
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
44 #include <bits/wordsize.h>
46 /* We don't have #include_next.
47 Define ANSI <limits.h> for standard 32-bit words. */
49 /* These assume 8-bit `char's, 16-bit `short int's,
50 and 32-bit `int's and `long int's. */
52 /* Number of bits in a `char'. */
53 # define CHAR_BIT 8
55 /* Minimum and maximum values a `signed char' can hold. */
56 # define SCHAR_MIN (-128)
57 # define SCHAR_MAX 127
59 /* Maximum value an `unsigned char' can hold. (Minimum is 0.) */
60 # define UCHAR_MAX 255
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
71 /* Minimum and maximum values a `signed short int' can hold. */
72 # define SHRT_MIN (-32768)
73 # define SHRT_MAX 32767
75 /* Maximum value an `unsigned short int' can hold. (Minimum is 0.) */
76 # define USHRT_MAX 65535
78 /* Minimum and maximum values a `signed int' can hold. */
79 # define INT_MIN (-INT_MAX - 1)
80 # define INT_MAX 2147483647
82 /* Maximum value an `unsigned int' can hold. (Minimum is 0.) */
83 # define UINT_MAX 4294967295U
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)
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
100 # ifdef __USE_ISOC99
102 /* Minimum and maximum values a `signed long long int' can hold. */
103 # define LLONG_MAX 9223372036854775807LL
104 # define LLONG_MIN (-LLONG_MAX - 1LL)
106 /* Maximum value an `unsigned long long int' can hold. (Minimum is 0.) */
107 # define ULLONG_MAX 18446744073709551615ULL
109 # endif /* ISO C99 */
111 # endif /* limits.h */
112 #endif /* GCC 2. */
114 #endif /* !_LIBC_LIMITS_H_ */
116 /* Get the compiler's limits.h, which defines almost all the ISO constants.
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
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
141 #ifdef __USE_POSIX
142 /* POSIX adds things to <limits.h>. */
143 # include <bits/posix1_lim.h>
144 #endif
146 #ifdef __USE_POSIX2
147 # include <bits/posix2_lim.h>
148 #endif
150 #ifdef __USE_XOPEN
151 # include <bits/xopen_lim.h>
152 #endif