maint/gnulib/lib/limits.in.h

/* */
   1 /* A GNU-like <limits.h>.
   2 
   3    Copyright 2016-2021 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
/* */
root/maint/gnulib/lib/limits.in.h
