| 1 | /* Copyright (C) 1996-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | /* |
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| 19 | * Never include this file directly; use <limits.h> instead. |
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| 20 | */ |
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| 21 | |
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| 22 | /* Additional definitions from X/Open Portability Guide, Issue 4, Version 2 |
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| 23 | System Interfaces and Headers, 4.16 <limits.h> |
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| 24 | |
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| 25 | Please note only the values which are not greater than the minimum |
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| 26 | stated in the standard document are listed. The `sysconf' functions |
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| 27 | should be used to obtain the actual value. */ |
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| 28 | |
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| 29 | #ifndef _XOPEN_LIM_H |
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| 30 | #define _XOPEN_LIM_H 1 |
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| 31 | |
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| 32 | /* We do not provide fixed values for |
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| 33 | |
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| 34 | ARG_MAX Maximum length of argument to the `exec' function |
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| 35 | including environment data. |
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| 36 | |
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| 37 | ATEXIT_MAX Maximum number of functions that may be registered |
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| 38 | with `atexit'. |
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| 39 | |
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| 40 | CHILD_MAX Maximum number of simultaneous processes per real |
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| 41 | user ID. |
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| 42 | |
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| 43 | OPEN_MAX Maximum number of files that one process can have open |
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| 44 | at anyone time. |
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| 45 | |
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| 46 | PAGESIZE |
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| 47 | PAGE_SIZE Size of bytes of a page. |
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| 48 | |
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| 49 | PASS_MAX Maximum number of significant bytes in a password. |
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| 50 | |
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| 51 | We only provide a fixed limit for |
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| 52 | |
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| 53 | IOV_MAX Maximum number of `iovec' structures that one process has |
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| 54 | available for use with `readv' or writev'. |
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| 55 | |
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| 56 | if this is indeed fixed by the underlying system. |
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| 57 | */ |
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| 58 | |
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| 59 | |
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| 60 | /* Maximum number of `iovec' structures that may be used in a single call |
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| 61 | to `readv', `writev', etc. */ |
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| 62 | #define _XOPEN_IOV_MAX _POSIX_UIO_MAXIOV |
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| 63 | |
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| 64 | #include <bits/uio_lim.h> |
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| 65 | #ifdef __IOV_MAX |
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| 66 | # define IOV_MAX __IOV_MAX |
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| 67 | #else |
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| 68 | # undef IOV_MAX |
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| 69 | #endif |
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| 70 | |
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| 71 | /* Maximum value of `digit' in calls to the `printf' and `scanf' |
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| 72 | functions. We have no limit, so return a reasonable value. */ |
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| 73 | #define NL_ARGMAX _POSIX_ARG_MAX |
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| 74 | |
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| 75 | /* Maximum number of bytes in a `LANG' name. We have no limit. */ |
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| 76 | #define NL_LANGMAX _POSIX2_LINE_MAX |
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| 77 | |
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| 78 | /* Maximum message number. We have no limit. */ |
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| 79 | #define NL_MSGMAX INT_MAX |
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| 80 | |
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| 81 | /* Maximum number of bytes in N-to-1 collation mapping. We have no |
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| 82 | limit. */ |
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| 83 | #if defined __USE_GNU || !defined __USE_XOPEN2K8 |
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| 84 | # define NL_NMAX INT_MAX |
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| 85 | #endif |
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| 86 | |
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| 87 | /* Maximum set number. We have no limit. */ |
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| 88 | #define NL_SETMAX INT_MAX |
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| 89 | |
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| 90 | /* Maximum number of bytes in a message. We have no limit. */ |
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| 91 | #define NL_TEXTMAX INT_MAX |
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| 92 | |
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| 93 | /* Default process priority. */ |
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| 94 | #define NZERO 20 |
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| 95 | |
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| 96 | |
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| 97 | /* Number of bits in a word of type `int'. */ |
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| 98 | #ifdef INT_MAX |
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| 99 | # if INT_MAX == 32767 |
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| 100 | # define WORD_BIT 16 |
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| 101 | # else |
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| 102 | # if INT_MAX == 2147483647 |
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| 103 | # define WORD_BIT 32 |
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| 104 | # else |
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| 105 | /* Safe assumption. */ |
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| 106 | # define WORD_BIT 64 |
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| 107 | # endif |
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| 108 | # endif |
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| 109 | #elif defined __INT_MAX__ |
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| 110 | # if __INT_MAX__ == 32767 |
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| 111 | # define WORD_BIT 16 |
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| 112 | # else |
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| 113 | # if __INT_MAX__ == 2147483647 |
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| 114 | # define WORD_BIT 32 |
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| 115 | # else |
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| 116 | /* Safe assumption. */ |
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| 117 | # define WORD_BIT 64 |
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| 118 | # endif |
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| 119 | # endif |
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| 120 | #else |
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| 121 | # define WORD_BIT 32 |
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| 122 | #endif |
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| 123 | |
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| 124 | /* Number of bits in a word of type `long int'. */ |
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| 125 | #ifdef LONG_MAX |
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| 126 | # if LONG_MAX == 2147483647 |
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| 127 | # define LONG_BIT 32 |
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| 128 | # else |
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| 129 | /* Safe assumption. */ |
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| 130 | # define LONG_BIT 64 |
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| 131 | # endif |
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| 132 | #elif defined __LONG_MAX__ |
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| 133 | # if __LONG_MAX__ == 2147483647 |
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| 134 | # define LONG_BIT 32 |
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| 135 | # else |
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| 136 | /* Safe assumption. */ |
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| 137 | # define LONG_BIT 64 |
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| 138 | # endif |
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| 139 | #else |
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| 140 | # include <bits/wordsize.h> |
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| 141 | # if __WORDSIZE == 64 |
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| 142 | # define LONG_BIT 64 |
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| 143 | # else |
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| 144 | # define LONG_BIT 32 |
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| 145 | # endif |
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| 146 | #endif |
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| 147 | |
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| 148 | #endif /* bits/xopen_lim.h */ |
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| 149 | |
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