1/* A GNU-like <limits.h>. 2 3 Copyright 2016-2022 Free Software Foundation, Inc. 4 5 This file is free software: you can redistribute it and/or modify 6 it under the terms of the GNU Lesser General Public License as 7 published by the Free Software Foundation; either version 2.1 of the 8 License, or (at your option) any later version. 9 10 This file 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 C2x and 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 || (defined __STDC_VERSION__ && 201710 < __STDC_VERSION__))) 107# define CHAR_WIDTH _GL_INTEGER_WIDTH (CHAR_MIN, CHAR_MAX) 108# define SCHAR_WIDTH _GL_INTEGER_WIDTH (SCHAR_MIN, SCHAR_MAX) 109# define UCHAR_WIDTH _GL_INTEGER_WIDTH (0, UCHAR_MAX) 110# define SHRT_WIDTH _GL_INTEGER_WIDTH (SHRT_MIN, SHRT_MAX) 111# define USHRT_WIDTH _GL_INTEGER_WIDTH (0, USHRT_MAX) 112# define INT_WIDTH _GL_INTEGER_WIDTH (INT_MIN, INT_MAX) 113# define UINT_WIDTH _GL_INTEGER_WIDTH (0, UINT_MAX) 114# define LONG_WIDTH _GL_INTEGER_WIDTH (LONG_MIN, LONG_MAX) 115# define ULONG_WIDTH _GL_INTEGER_WIDTH (0, ULONG_MAX) 116# define LLONG_WIDTH _GL_INTEGER_WIDTH (LLONG_MIN, LLONG_MAX) 117# define ULLONG_WIDTH _GL_INTEGER_WIDTH (0, ULLONG_MAX) 118#endif 119 120/* Macros specified by C2x. */ 121 122#if (! defined BOOL_WIDTH \ 123 && (defined _GNU_SOURCE \ 124 || (defined __STDC_VERSION__ && 201710 < __STDC_VERSION__))) 125# define BOOL_MAX 1 126# define BOOL_WIDTH 1 127#endif 128 129#endif /* _@GUARD_PREFIX@_LIMITS_H */ 130#endif /* _@GUARD_PREFIX@_LIMITS_H */ 131#endif 132