1 /* A GNU-like <limits.h>. 2 3 Copyright 2016-2021 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 Lesser General Public License 7 as published by the Free Software Foundation; either version 2, 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 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public License 16 along with this program; if not, see <https://www.gnu.org/licenses/>. */ 17 18 #if __GNUC__ >= 3 19 @PRAGMA_SYSTEM_HEADER@ 20 #endif 21 @PRAGMA_COLUMNS@ 22 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 30 #@INCLUDE_NEXT@ @NEXT_LIMITS_H@ 31 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 44 #ifndef _@GUARD_PREFIX@_LIMITS_H 45 #define _@GUARD_PREFIX@_LIMITS_H 46 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 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 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 101 102 /* 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 */ 121 #endif 122