1 | /* Copyright (C) 1991-2024 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 | <https://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 | #define |
26 | #include <bits/libc-header-start.h> |
27 | |
28 | |
29 | /* Maximum length of any multibyte character in any locale. |
30 | We define this value here since the gcc header does not define |
31 | the correct value. */ |
32 | #define MB_LEN_MAX 16 |
33 | |
34 | |
35 | /* If we are not using GNU CC we have to define all the symbols ourself. |
36 | Otherwise use gcc's definitions (see below). */ |
37 | #if !defined __GNUC__ || __GNUC__ < 2 |
38 | |
39 | /* We only protect from multiple inclusion here, because all the other |
40 | #include's protect themselves, and in GCC 2 we may #include_next through |
41 | multiple copies of this file before we get to GCC's. */ |
42 | # ifndef _LIMITS_H |
43 | # define _LIMITS_H 1 |
44 | |
45 | #include <bits/wordsize.h> |
46 | |
47 | /* We don't have #include_next. |
48 | Define ANSI <limits.h> for standard 32-bit words. */ |
49 | |
50 | /* These assume 8-bit `char's, 16-bit `short int's, |
51 | and 32-bit `int's and `long int's. */ |
52 | |
53 | /* Number of bits in a `char'. */ |
54 | # define CHAR_BIT 8 |
55 | |
56 | /* Minimum and maximum values a `signed char' can hold. */ |
57 | # define SCHAR_MIN (-128) |
58 | # define SCHAR_MAX 127 |
59 | |
60 | /* Maximum value an `unsigned char' can hold. (Minimum is 0.) */ |
61 | # define UCHAR_MAX 255 |
62 | |
63 | /* Minimum and maximum values a `char' can hold. */ |
64 | # ifdef __CHAR_UNSIGNED__ |
65 | # define CHAR_MIN 0 |
66 | # define CHAR_MAX UCHAR_MAX |
67 | # else |
68 | # define CHAR_MIN SCHAR_MIN |
69 | # define CHAR_MAX SCHAR_MAX |
70 | # endif |
71 | |
72 | /* Minimum and maximum values a `signed short int' can hold. */ |
73 | # define SHRT_MIN (-32768) |
74 | # define SHRT_MAX 32767 |
75 | |
76 | /* Maximum value an `unsigned short int' can hold. (Minimum is 0.) */ |
77 | # define USHRT_MAX 65535 |
78 | |
79 | /* Minimum and maximum values a `signed int' can hold. */ |
80 | # define INT_MIN (-INT_MAX - 1) |
81 | # define INT_MAX 2147483647 |
82 | |
83 | /* Maximum value an `unsigned int' can hold. (Minimum is 0.) */ |
84 | # define UINT_MAX 4294967295U |
85 | |
86 | /* Minimum and maximum values a `signed long int' can hold. */ |
87 | # if __WORDSIZE == 64 |
88 | # define LONG_MAX 9223372036854775807L |
89 | # else |
90 | # define LONG_MAX 2147483647L |
91 | # endif |
92 | # define LONG_MIN (-LONG_MAX - 1L) |
93 | |
94 | /* Maximum value an `unsigned long int' can hold. (Minimum is 0.) */ |
95 | # if __WORDSIZE == 64 |
96 | # define ULONG_MAX 18446744073709551615UL |
97 | # else |
98 | # define ULONG_MAX 4294967295UL |
99 | # endif |
100 | |
101 | # ifdef __USE_ISOC99 |
102 | |
103 | /* Minimum and maximum values a `signed long long int' can hold. */ |
104 | # define LLONG_MAX 9223372036854775807LL |
105 | # define LLONG_MIN (-LLONG_MAX - 1LL) |
106 | |
107 | /* Maximum value an `unsigned long long int' can hold. (Minimum is 0.) */ |
108 | # define ULLONG_MAX 18446744073709551615ULL |
109 | |
110 | # endif /* ISO C99 */ |
111 | |
112 | # endif /* limits.h */ |
113 | #endif /* GCC 2. */ |
114 | |
115 | #endif /* !_LIBC_LIMITS_H_ */ |
116 | |
117 | /* Get the compiler's limits.h, which defines almost all the ISO constants. |
118 | |
119 | We put this #include_next outside the double inclusion check because |
120 | it should be possible to include this file more than once and still get |
121 | the definitions from gcc's header. */ |
122 | #if defined __GNUC__ && !defined _GCC_LIMITS_H_ |
123 | /* `_GCC_LIMITS_H_' is what GCC's file defines. */ |
124 | # include_next <limits.h> |
125 | #endif |
126 | |
127 | /* The <limits.h> files in some gcc versions don't define LLONG_MIN, |
128 | LLONG_MAX, and ULLONG_MAX. Instead only the values gcc defined for |
129 | ages are available. */ |
130 | #if defined __USE_ISOC99 && defined __GNUC__ |
131 | # ifndef LLONG_MIN |
132 | # define LLONG_MIN (-LLONG_MAX-1) |
133 | # endif |
134 | # ifndef LLONG_MAX |
135 | # define LLONG_MAX __LONG_LONG_MAX__ |
136 | # endif |
137 | # ifndef ULLONG_MAX |
138 | # define ULLONG_MAX (LLONG_MAX * 2ULL + 1) |
139 | # endif |
140 | #endif |
141 | |
142 | /* The integer width macros are not defined by GCC's <limits.h> before |
143 | GCC 7, or if _GNU_SOURCE rather than |
144 | __STDC_WANT_IEC_60559_BFP_EXT__ is used to enable this feature. */ |
145 | #if __GLIBC_USE (IEC_60559_BFP_EXT_C2X) |
146 | # ifndef CHAR_WIDTH |
147 | # define CHAR_WIDTH 8 |
148 | # endif |
149 | # ifndef SCHAR_WIDTH |
150 | # define SCHAR_WIDTH 8 |
151 | # endif |
152 | # ifndef UCHAR_WIDTH |
153 | # define UCHAR_WIDTH 8 |
154 | # endif |
155 | # ifndef SHRT_WIDTH |
156 | # define SHRT_WIDTH 16 |
157 | # endif |
158 | # ifndef USHRT_WIDTH |
159 | # define USHRT_WIDTH 16 |
160 | # endif |
161 | # ifndef INT_WIDTH |
162 | # define INT_WIDTH 32 |
163 | # endif |
164 | # ifndef UINT_WIDTH |
165 | # define UINT_WIDTH 32 |
166 | # endif |
167 | # ifndef LONG_WIDTH |
168 | # define LONG_WIDTH __WORDSIZE |
169 | # endif |
170 | # ifndef ULONG_WIDTH |
171 | # define ULONG_WIDTH __WORDSIZE |
172 | # endif |
173 | # ifndef LLONG_WIDTH |
174 | # define LLONG_WIDTH 64 |
175 | # endif |
176 | # ifndef ULLONG_WIDTH |
177 | # define ULLONG_WIDTH 64 |
178 | # endif |
179 | #endif /* Use IEC_60559_BFP_EXT. */ |
180 | |
181 | /* The macros for _Bool are not defined by GCC's <limits.h> before GCC |
182 | 11, or if _GNU_SOURCE is defined rather than enabling C2x support |
183 | with -std. */ |
184 | #if __GLIBC_USE (ISOC2X) |
185 | # ifndef BOOL_MAX |
186 | # define BOOL_MAX 1 |
187 | # endif |
188 | # ifndef BOOL_WIDTH |
189 | # define BOOL_WIDTH 1 |
190 | # endif |
191 | #endif |
192 | |
193 | #ifdef __USE_POSIX |
194 | /* POSIX adds things to <limits.h>. */ |
195 | # include <bits/posix1_lim.h> |
196 | #endif |
197 | |
198 | #ifdef __USE_POSIX2 |
199 | # include <bits/posix2_lim.h> |
200 | #endif |
201 | |
202 | #ifdef __USE_XOPEN |
203 | # include <bits/xopen_lim.h> |
204 | #endif |
205 | |