include/bits/xopen_lim.h

   1 /* Copyright (C) 1996, 1997, 1999, 2001 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 /*
  20  * Never include this file directly; use <limits.h> instead.
  21  */
  22
  23 /* Additional definitions from X/Open Portability Guide, Issue 4, Version 2
  24    System Interfaces and Headers, 4.16 <limits.h>
  25
  26    Please note only the values which are not greater than the minimum
  27    stated in the standard document are listed.  The `sysconf' functions
  28    should be used to obtain the actual value.  */
  29
  30 #ifndef _XOPEN_LIM_H
  31 #define _XOPEN_LIM_H    1
  32
  33 #define __need_IOV_MAX
  34 #include <bits/stdio_lim.h>
  35
  36 /* We do not provide fixed values for
  37
  38    ARG_MAX      Maximum length of argument to the `exec' function
  39                 including environment data.
  40
  41    ATEXIT_MAX   Maximum number of functions that may be registered
  42                 with `atexit'.
  43
  44    CHILD_MAX    Maximum number of simultaneous processes per real
  45                 user ID.
  46
  47    OPEN_MAX     Maximum number of files that one process can have open
  48                 at anyone time.
  49
  50    PAGESIZE
  51    PAGE_SIZE    Size of bytes of a page.
  52
  53    PASS_MAX     Maximum number of significant bytes in a password.
  54
  55    We only provide a fixed limit for
  56
  57    IOV_MAX      Maximum number of `iovec' structures that one process has
  58                 available for use with `readv' or writev'.
  59
  60    if this is indeed fixed by the underlying system.
  61 */
  62
  63
  64 /* Maximum number of `iovec' structures that one process has available
  65    for use with `readv' or writev'.  */
  66 #define _XOPEN_IOV_MAX  _POSIX_UIO_MAXIOV
  67
  68
  69 /* Maximum value of `digit' in calls to the `printf' and `scanf'
  70    functions.  We have no limit, so return a reasonable value.  */
  71 #define NL_ARGMAX       _POSIX_ARG_MAX
  72
  73 /* Maximum number of bytes in a `LANG' name.  We have no limit.  */
  74 #define NL_LANGMAX      _POSIX2_LINE_MAX
  75
  76 /* Maximum message number.  We have no limit.  */
  77 #define NL_MSGMAX       INT_MAX
  78
  79 /* Maximum number of bytes in N-to-1 collation mapping.  We have no
  80    limit.  */
  81 #define NL_NMAX         INT_MAX
  82
  83 /* Maximum set number.  We have no limit.  */
  84 #define NL_SETMAX       INT_MAX
  85
  86 /* Maximum number of bytes in a message.  We have no limit.  */
  87 #define NL_TEXTMAX      INT_MAX
  88
  89 /* Default process priority.  */
  90 #define NZERO           20
  91
  92
  93 /* Number of bits in a word of type `int'.  */
  94 #ifdef INT_MAX
  95 # if INT_MAX == 32767
  96 #  define WORD_BIT      16
  97 # else
  98 #  if INT_MAX == 2147483647
  99 #   define WORD_BIT     32
 100 #  else
 101 /* Safe assumption.  */
 102 #   define WORD_BIT     64
 103 #  endif
 104 # endif
 105 #elif defined __INT_MAX__
 106 # if __INT_MAX__ == 32767
 107 #  define WORD_BIT      16
 108 # else
 109 #  if __INT_MAX__ == 2147483647
 110 #   define WORD_BIT     32
 111 #  else
 112 /* Safe assumption.  */
 113 #   define WORD_BIT     64
 114 #  endif
 115 # endif
 116 #else
 117 # define WORD_BIT       32
 118 #endif
 119
 120 /* Number of bits in a word of type `long int'.  */
 121 #ifdef LONG_MAX
 122 # if LONG_MAX == 2147483647
 123 #  define LONG_BIT      32
 124 # else
 125 /* Safe assumption.  */
 126 #  define LONG_BIT      64
 127 # endif
 128 #elif defined __LONG_MAX__
 129 # if __LONG_MAX__ == 2147483647
 130 #  define LONG_BIT      32
 131 # else
 132 /* Safe assumption.  */
 133 #  define LONG_BIT      64
 134 # endif
 135 #else
 136 # include <bits/wordsize.h>
 137 # if __WORDSIZE == 64
 138 #  define LONG_BIT      64
 139 # else
 140 #  define LONG_BIT      32
 141 # endif
 142 #endif
 143
 144 #endif /* bits/xopen_lim.h */