| /* A GNU-like <limits.h>. |
| |
| Copyright 2016 Free Software Foundation, Inc. |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License |
| as published by the Free Software Foundation; either version 3, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, see <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _@GUARD_PREFIX@_LIMITS_H |
| |
| #if __GNUC__ >= 3 |
| @PRAGMA_SYSTEM_HEADER@ |
| #endif |
| @PRAGMA_COLUMNS@ |
| |
| /* The include_next requires a split double-inclusion guard. */ |
| #@INCLUDE_NEXT@ @NEXT_LIMITS_H@ |
| |
| #ifndef _@GUARD_PREFIX@_LIMITS_H |
| #define _@GUARD_PREFIX@_LIMITS_H |
| |
| /* The number of usable bits in an unsigned or signed integer type |
| with minimum value MIN and maximum value MAX, as an int expression |
| suitable in #if. Cover all known practical hosts. This |
| implementation exploits the fact that MAX is 1 less than a power of |
| 2, and merely counts the number of 1 bits in MAX; "COBn" means |
| "count the number of 1 bits in the low-order n bits"). */ |
| #define _GL_INTEGER_WIDTH(min, max) (((min) < 0) + _GL_COB128 (max)) |
| #define _GL_COB128(n) (_GL_COB64 ((n) >> 31 >> 31 >> 2) + _GL_COB64 (n)) |
| #define _GL_COB64(n) (_GL_COB32 ((n) >> 31 >> 1) + _GL_COB32 (n)) |
| #define _GL_COB32(n) (_GL_COB16 ((n) >> 16) + _GL_COB16 (n)) |
| #define _GL_COB16(n) (_GL_COB8 ((n) >> 8) + _GL_COB8 (n)) |
| #define _GL_COB8(n) (_GL_COB4 ((n) >> 4) + _GL_COB4 (n)) |
| #define _GL_COB4(n) (!!((n) & 8) + !!((n) & 4) + !!((n) & 2) + !!((n) & 1)) |
| |
| /* Macros specified by ISO/IEC TS 18661-1:2014. */ |
| |
| #if (! defined ULLONG_WIDTH \ |
| && (defined _GNU_SOURCE || defined __STDC_WANT_IEC_60559_BFP_EXT__)) |
| # define CHAR_WIDTH _GL_INTEGER_WIDTH (CHAR_MIN, CHAR_MAX) |
| # define SCHAR_WIDTH _GL_INTEGER_WIDTH (SCHAR_MIN, SCHAR_MAX) |
| # define UCHAR_WIDTH _GL_INTEGER_WIDTH (0, UCHAR_MAX) |
| # define SHRT_WIDTH _GL_INTEGER_WIDTH (SHRT_MIN, SHRT_MAX) |
| # define USHRT_WIDTH _GL_INTEGER_WIDTH (0, USHRT_MAX) |
| # define INT_WIDTH _GL_INTEGER_WIDTH (INT_MIN, INT_MAX) |
| # define UINT_WIDTH _GL_INTEGER_WIDTH (0, UINT_MAX) |
| # define LONG_WIDTH _GL_INTEGER_WIDTH (LONG_MIN, LONG_MAX) |
| # define ULONG_WIDTH _GL_INTEGER_WIDTH (0, ULONG_MAX) |
| # define LLONG_WIDTH _GL_INTEGER_WIDTH (LLONG_MIN, LLONG_MAX) |
| # define ULLONG_WIDTH _GL_INTEGER_WIDTH (0, ULLONG_MAX) |
| #endif /* !ULLONG_WIDTH && (_GNU_SOURCE || __STDC_WANT_IEC_60559_BFP_EXT__) */ |
| |
| #endif /* _@GUARD_PREFIX@_LIMITS_H */ |
| #endif /* _@GUARD_PREFIX@_LIMITS_H */ |