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f73dda09 JA |
1 | /* typemax.h -- encapsulate max values for long, long long, etc. */ |
2 | ||
3 | /* Copyright (C) 2001 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GNU Bash, the Bourne Again SHell. | |
6 | ||
3185942a JA |
7 | Bash is free software: you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation, either version 3 of the License, or | |
10 | (at your option) any later version. | |
f73dda09 | 11 | |
3185942a JA |
12 | Bash is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
f73dda09 | 16 | |
3185942a JA |
17 | You should have received a copy of the GNU General Public License |
18 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
f73dda09 JA |
20 | |
21 | /* | |
22 | * NOTE: This should be included after config.h, limits.h, stdint.h, and | |
23 | * inttypes.h | |
24 | */ | |
25 | ||
26 | #ifndef _SH_TYPEMAX_H | |
27 | #define _SH_TYPEMAX_H | |
28 | ||
29 | #ifndef CHAR_BIT | |
30 | # define CHAR_BIT 8 | |
31 | #endif | |
32 | ||
33 | /* Nonzero if the integer type T is signed. */ | |
34 | #ifndef TYPE_SIGNED | |
35 | # define TYPE_SIGNED(t) (! ((t) 0 < (t) -1)) | |
36 | #endif | |
37 | ||
38 | #ifndef TYPE_MINIMUM | |
39 | # define TYPE_MINIMUM(t) ((t) (TYPE_SIGNED (t) \ | |
40 | ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) \ | |
41 | : (t) 0)) | |
42 | #endif | |
43 | ||
44 | #ifndef TYPE_MAXIMUM | |
45 | # define TYPE_MAXIMUM(t) ((t) (~ (t) 0 - TYPE_MINIMUM (t))) | |
46 | #endif | |
47 | ||
48 | #ifdef HAVE_LONG_LONG | |
49 | # ifndef LLONG_MAX | |
50 | # define LLONG_MAX TYPE_MAXIMUM(long long int) | |
51 | # define LLONG_MIN TYPE_MINIMUM(long long int) | |
52 | # endif | |
53 | # ifndef ULLONG_MAX | |
54 | # define ULLONG_MAX TYPE_MAXIMUM(unsigned long long int) | |
55 | # endif | |
56 | #endif | |
57 | ||
58 | #ifndef ULONG_MAX | |
59 | # define ULONG_MAX ((unsigned long) ~(unsigned long) 0) | |
60 | #endif | |
61 | ||
62 | #ifndef LONG_MAX | |
63 | # define LONG_MAX ((long int) (ULONG_MAX >> 1)) | |
64 | # define LONG_MIN ((long int) (-LONG_MAX - 1L)) | |
65 | #endif | |
66 | ||
67 | #ifndef INT_MAX /* ouch */ | |
68 | # define INT_MAX TYPE_MAXIMUM(int) | |
69 | # define INT_MIN TYPE_MINIMUM(int) | |
70 | # define UINT_MAX ((unsigned int) ~(unsigned int)0) | |
71 | #endif | |
72 | ||
73 | /* workaround for gcc bug in versions < 2.7 */ | |
74 | #if defined (HAVE_LONG_LONG) && __GNUC__ == 2 && __GNUC_MINOR__ < 7 | |
75 | static const unsigned long long int maxquad = ULLONG_MAX; | |
76 | # undef ULLONG_MAX | |
77 | # define ULLONG_MAX maxquad | |
78 | #endif | |
79 | ||
495aee44 CR |
80 | #if !defined (INTMAX_MAX) || !defined (INTMAX_MIN) |
81 | ||
82 | #if SIZEOF_INTMAX_T == SIZEOF_LONG_LONG | |
83 | # define INTMAX_MAX LLONG_MAX | |
84 | # define INTMAX_MIN LLONG_MIN | |
85 | #elif SIZEOF_INTMAX_T == SIZEOF_LONG | |
86 | # define INTMAX_MAX LONG_MAX | |
87 | # define INTMAX_MIN LONG_MIN | |
88 | #else | |
89 | # define INTMAX_MAX INT_MAX | |
90 | # define INTMAX_MIN INT_MIN | |
91 | #endif | |
92 | ||
93 | #endif | |
94 | ||
3185942a JA |
95 | #ifndef SSIZE_MAX |
96 | # define SSIZE_MAX 32767 /* POSIX minimum max */ | |
97 | #endif | |
98 | ||
f73dda09 | 99 | #endif /* _SH_TYPEMAX_H */ |