Commit | Line | Data |
---|---|---|
49e4877c PA |
1 | /* A GNU-like <limits.h>. |
2 | ||
9c9d63b1 | 3 | Copyright 2016-2021 Free Software Foundation, Inc. |
49e4877c PA |
4 | |
5 | This program is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU General Public License | |
7 | as published by the Free Software Foundation; either version 3, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program 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 | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
c0c3707f | 16 | along with this program; if not, see <https://www.gnu.org/licenses/>. */ |
49e4877c | 17 | |
49e4877c PA |
18 | #if __GNUC__ >= 3 |
19 | @PRAGMA_SYSTEM_HEADER@ | |
20 | #endif | |
21 | @PRAGMA_COLUMNS@ | |
22 | ||
698be2d8 CB |
23 | #if defined _GL_ALREADY_INCLUDING_LIMITS_H |
24 | /* Special invocation convention: | |
25 | On Haiku/x86_64, we have a sequence of nested includes | |
26 | <limits.h> -> <syslimits.h> -> <limits.h>. | |
27 | In this situation, LONG_MAX and INT_MAX are not yet defined, | |
28 | therefore we should not attempt to define LONG_BIT. */ | |
29 | ||
49e4877c PA |
30 | #@INCLUDE_NEXT@ @NEXT_LIMITS_H@ |
31 | ||
698be2d8 CB |
32 | #else |
33 | /* Normal invocation convention. */ | |
34 | ||
35 | #ifndef _@GUARD_PREFIX@_LIMITS_H | |
36 | ||
37 | # define _GL_ALREADY_INCLUDING_LIMITS_H | |
38 | ||
39 | /* The include_next requires a split double-inclusion guard. */ | |
40 | # @INCLUDE_NEXT@ @NEXT_LIMITS_H@ | |
41 | ||
42 | # undef _GL_ALREADY_INCLUDING_LIMITS_H | |
43 | ||
49e4877c PA |
44 | #ifndef _@GUARD_PREFIX@_LIMITS_H |
45 | #define _@GUARD_PREFIX@_LIMITS_H | |
46 | ||
c0c3707f CB |
47 | #ifndef LLONG_MIN |
48 | # if defined LONG_LONG_MIN /* HP-UX 11.31 */ | |
49 | # define LLONG_MIN LONG_LONG_MIN | |
50 | # elif defined LONGLONG_MIN /* IRIX 6.5 */ | |
51 | # define LLONG_MIN LONGLONG_MIN | |
52 | # elif defined __GNUC__ | |
53 | # define LLONG_MIN (- __LONG_LONG_MAX__ - 1LL) | |
54 | # endif | |
55 | #endif | |
56 | #ifndef LLONG_MAX | |
57 | # if defined LONG_LONG_MAX /* HP-UX 11.31 */ | |
58 | # define LLONG_MAX LONG_LONG_MAX | |
59 | # elif defined LONGLONG_MAX /* IRIX 6.5 */ | |
60 | # define LLONG_MAX LONGLONG_MAX | |
61 | # elif defined __GNUC__ | |
62 | # define LLONG_MAX __LONG_LONG_MAX__ | |
63 | # endif | |
64 | #endif | |
65 | #ifndef ULLONG_MAX | |
66 | # if defined ULONG_LONG_MAX /* HP-UX 11.31 */ | |
67 | # define ULLONG_MAX ULONG_LONG_MAX | |
68 | # elif defined ULONGLONG_MAX /* IRIX 6.5 */ | |
69 | # define ULLONG_MAX ULONGLONG_MAX | |
70 | # elif defined __GNUC__ | |
71 | # define ULLONG_MAX (__LONG_LONG_MAX__ * 2ULL + 1ULL) | |
72 | # endif | |
73 | #endif | |
74 | ||
49e4877c PA |
75 | /* The number of usable bits in an unsigned or signed integer type |
76 | with minimum value MIN and maximum value MAX, as an int expression | |
77 | suitable in #if. Cover all known practical hosts. This | |
78 | implementation exploits the fact that MAX is 1 less than a power of | |
79 | 2, and merely counts the number of 1 bits in MAX; "COBn" means | |
80 | "count the number of 1 bits in the low-order n bits"). */ | |
81 | #define _GL_INTEGER_WIDTH(min, max) (((min) < 0) + _GL_COB128 (max)) | |
82 | #define _GL_COB128(n) (_GL_COB64 ((n) >> 31 >> 31 >> 2) + _GL_COB64 (n)) | |
83 | #define _GL_COB64(n) (_GL_COB32 ((n) >> 31 >> 1) + _GL_COB32 (n)) | |
84 | #define _GL_COB32(n) (_GL_COB16 ((n) >> 16) + _GL_COB16 (n)) | |
85 | #define _GL_COB16(n) (_GL_COB8 ((n) >> 8) + _GL_COB8 (n)) | |
86 | #define _GL_COB8(n) (_GL_COB4 ((n) >> 4) + _GL_COB4 (n)) | |
87 | #define _GL_COB4(n) (!!((n) & 8) + !!((n) & 4) + !!((n) & 2) + !!((n) & 1)) | |
88 | ||
c0c3707f CB |
89 | #ifndef WORD_BIT |
90 | /* Assume 'int' is 32 bits wide. */ | |
91 | # define WORD_BIT 32 | |
92 | #endif | |
93 | #ifndef LONG_BIT | |
94 | /* Assume 'long' is 32 or 64 bits wide. */ | |
95 | # if LONG_MAX == INT_MAX | |
96 | # define LONG_BIT 32 | |
97 | # else | |
98 | # define LONG_BIT 64 | |
99 | # endif | |
100 | #endif | |
101 | ||
49e4877c PA |
102 | /* Macros specified by ISO/IEC TS 18661-1:2014. */ |
103 | ||
104 | #if (! defined ULLONG_WIDTH \ | |
105 | && (defined _GNU_SOURCE || defined __STDC_WANT_IEC_60559_BFP_EXT__)) | |
106 | # define CHAR_WIDTH _GL_INTEGER_WIDTH (CHAR_MIN, CHAR_MAX) | |
107 | # define SCHAR_WIDTH _GL_INTEGER_WIDTH (SCHAR_MIN, SCHAR_MAX) | |
108 | # define UCHAR_WIDTH _GL_INTEGER_WIDTH (0, UCHAR_MAX) | |
109 | # define SHRT_WIDTH _GL_INTEGER_WIDTH (SHRT_MIN, SHRT_MAX) | |
110 | # define USHRT_WIDTH _GL_INTEGER_WIDTH (0, USHRT_MAX) | |
111 | # define INT_WIDTH _GL_INTEGER_WIDTH (INT_MIN, INT_MAX) | |
112 | # define UINT_WIDTH _GL_INTEGER_WIDTH (0, UINT_MAX) | |
113 | # define LONG_WIDTH _GL_INTEGER_WIDTH (LONG_MIN, LONG_MAX) | |
114 | # define ULONG_WIDTH _GL_INTEGER_WIDTH (0, ULONG_MAX) | |
115 | # define LLONG_WIDTH _GL_INTEGER_WIDTH (LLONG_MIN, LLONG_MAX) | |
116 | # define ULLONG_WIDTH _GL_INTEGER_WIDTH (0, ULLONG_MAX) | |
117 | #endif /* !ULLONG_WIDTH && (_GNU_SOURCE || __STDC_WANT_IEC_60559_BFP_EXT__) */ | |
118 | ||
119 | #endif /* _@GUARD_PREFIX@_LIMITS_H */ | |
120 | #endif /* _@GUARD_PREFIX@_LIMITS_H */ | |
698be2d8 | 121 | #endif |