| 1 | /* A GNU-like <limits.h>. |
| 2 | |
| 3 | Copyright 2016-2020 Free Software Foundation, Inc. |
| 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 |
| 16 | along with this program; if not, see <https://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #ifndef _@GUARD_PREFIX@_LIMITS_H |
| 19 | |
| 20 | #if __GNUC__ >= 3 |
| 21 | @PRAGMA_SYSTEM_HEADER@ |
| 22 | #endif |
| 23 | @PRAGMA_COLUMNS@ |
| 24 | |
| 25 | /* The include_next requires a split double-inclusion guard. */ |
| 26 | #@INCLUDE_NEXT@ @NEXT_LIMITS_H@ |
| 27 | |
| 28 | #ifndef _@GUARD_PREFIX@_LIMITS_H |
| 29 | #define _@GUARD_PREFIX@_LIMITS_H |
| 30 | |
| 31 | #ifndef LLONG_MIN |
| 32 | # if defined LONG_LONG_MIN /* HP-UX 11.31 */ |
| 33 | # define LLONG_MIN LONG_LONG_MIN |
| 34 | # elif defined LONGLONG_MIN /* IRIX 6.5 */ |
| 35 | # define LLONG_MIN LONGLONG_MIN |
| 36 | # elif defined __GNUC__ |
| 37 | # define LLONG_MIN (- __LONG_LONG_MAX__ - 1LL) |
| 38 | # endif |
| 39 | #endif |
| 40 | #ifndef LLONG_MAX |
| 41 | # if defined LONG_LONG_MAX /* HP-UX 11.31 */ |
| 42 | # define LLONG_MAX LONG_LONG_MAX |
| 43 | # elif defined LONGLONG_MAX /* IRIX 6.5 */ |
| 44 | # define LLONG_MAX LONGLONG_MAX |
| 45 | # elif defined __GNUC__ |
| 46 | # define LLONG_MAX __LONG_LONG_MAX__ |
| 47 | # endif |
| 48 | #endif |
| 49 | #ifndef ULLONG_MAX |
| 50 | # if defined ULONG_LONG_MAX /* HP-UX 11.31 */ |
| 51 | # define ULLONG_MAX ULONG_LONG_MAX |
| 52 | # elif defined ULONGLONG_MAX /* IRIX 6.5 */ |
| 53 | # define ULLONG_MAX ULONGLONG_MAX |
| 54 | # elif defined __GNUC__ |
| 55 | # define ULLONG_MAX (__LONG_LONG_MAX__ * 2ULL + 1ULL) |
| 56 | # endif |
| 57 | #endif |
| 58 | |
| 59 | /* The number of usable bits in an unsigned or signed integer type |
| 60 | with minimum value MIN and maximum value MAX, as an int expression |
| 61 | suitable in #if. Cover all known practical hosts. This |
| 62 | implementation exploits the fact that MAX is 1 less than a power of |
| 63 | 2, and merely counts the number of 1 bits in MAX; "COBn" means |
| 64 | "count the number of 1 bits in the low-order n bits"). */ |
| 65 | #define _GL_INTEGER_WIDTH(min, max) (((min) < 0) + _GL_COB128 (max)) |
| 66 | #define _GL_COB128(n) (_GL_COB64 ((n) >> 31 >> 31 >> 2) + _GL_COB64 (n)) |
| 67 | #define _GL_COB64(n) (_GL_COB32 ((n) >> 31 >> 1) + _GL_COB32 (n)) |
| 68 | #define _GL_COB32(n) (_GL_COB16 ((n) >> 16) + _GL_COB16 (n)) |
| 69 | #define _GL_COB16(n) (_GL_COB8 ((n) >> 8) + _GL_COB8 (n)) |
| 70 | #define _GL_COB8(n) (_GL_COB4 ((n) >> 4) + _GL_COB4 (n)) |
| 71 | #define _GL_COB4(n) (!!((n) & 8) + !!((n) & 4) + !!((n) & 2) + !!((n) & 1)) |
| 72 | |
| 73 | #ifndef WORD_BIT |
| 74 | /* Assume 'int' is 32 bits wide. */ |
| 75 | # define WORD_BIT 32 |
| 76 | #endif |
| 77 | #ifndef LONG_BIT |
| 78 | /* Assume 'long' is 32 or 64 bits wide. */ |
| 79 | # if LONG_MAX == INT_MAX |
| 80 | # define LONG_BIT 32 |
| 81 | # else |
| 82 | # define LONG_BIT 64 |
| 83 | # endif |
| 84 | #endif |
| 85 | |
| 86 | /* Macros specified by ISO/IEC TS 18661-1:2014. */ |
| 87 | |
| 88 | #if (! defined ULLONG_WIDTH \ |
| 89 | && (defined _GNU_SOURCE || defined __STDC_WANT_IEC_60559_BFP_EXT__)) |
| 90 | # define CHAR_WIDTH _GL_INTEGER_WIDTH (CHAR_MIN, CHAR_MAX) |
| 91 | # define SCHAR_WIDTH _GL_INTEGER_WIDTH (SCHAR_MIN, SCHAR_MAX) |
| 92 | # define UCHAR_WIDTH _GL_INTEGER_WIDTH (0, UCHAR_MAX) |
| 93 | # define SHRT_WIDTH _GL_INTEGER_WIDTH (SHRT_MIN, SHRT_MAX) |
| 94 | # define USHRT_WIDTH _GL_INTEGER_WIDTH (0, USHRT_MAX) |
| 95 | # define INT_WIDTH _GL_INTEGER_WIDTH (INT_MIN, INT_MAX) |
| 96 | # define UINT_WIDTH _GL_INTEGER_WIDTH (0, UINT_MAX) |
| 97 | # define LONG_WIDTH _GL_INTEGER_WIDTH (LONG_MIN, LONG_MAX) |
| 98 | # define ULONG_WIDTH _GL_INTEGER_WIDTH (0, ULONG_MAX) |
| 99 | # define LLONG_WIDTH _GL_INTEGER_WIDTH (LLONG_MIN, LLONG_MAX) |
| 100 | # define ULLONG_WIDTH _GL_INTEGER_WIDTH (0, ULLONG_MAX) |
| 101 | #endif /* !ULLONG_WIDTH && (_GNU_SOURCE || __STDC_WANT_IEC_60559_BFP_EXT__) */ |
| 102 | |
| 103 | #endif /* _@GUARD_PREFIX@_LIMITS_H */ |
| 104 | #endif /* _@GUARD_PREFIX@_LIMITS_H */ |