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#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