1 | /* Copyright (C) 1996-2017 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, see |
16 | <http://www.gnu.org/licenses/>. */ |
17 | |
18 | /* |
19 | * Never include this file directly; use <limits.h> instead. |
20 | */ |
21 | |
22 | /* Additional definitions from X/Open Portability Guide, Issue 4, Version 2 |
23 | System Interfaces and Headers, 4.16 <limits.h> |
24 | |
25 | Please note only the values which are not greater than the minimum |
26 | stated in the standard document are listed. The `sysconf' functions |
27 | should be used to obtain the actual value. */ |
28 | |
29 | #ifndef _XOPEN_LIM_H |
30 | #define _XOPEN_LIM_H 1 |
31 | |
32 | #define __need_IOV_MAX |
33 | #include <bits/stdio_lim.h> |
34 | |
35 | /* We do not provide fixed values for |
36 | |
37 | ARG_MAX Maximum length of argument to the `exec' function |
38 | including environment data. |
39 | |
40 | ATEXIT_MAX Maximum number of functions that may be registered |
41 | with `atexit'. |
42 | |
43 | CHILD_MAX Maximum number of simultaneous processes per real |
44 | user ID. |
45 | |
46 | OPEN_MAX Maximum number of files that one process can have open |
47 | at anyone time. |
48 | |
49 | PAGESIZE |
50 | PAGE_SIZE Size of bytes of a page. |
51 | |
52 | PASS_MAX Maximum number of significant bytes in a password. |
53 | |
54 | We only provide a fixed limit for |
55 | |
56 | IOV_MAX Maximum number of `iovec' structures that one process has |
57 | available for use with `readv' or writev'. |
58 | |
59 | if this is indeed fixed by the underlying system. |
60 | */ |
61 | |
62 | |
63 | /* Maximum number of `iovec' structures that one process has available |
64 | for use with `readv' or writev'. */ |
65 | #define _XOPEN_IOV_MAX _POSIX_UIO_MAXIOV |
66 | |
67 | |
68 | /* Maximum value of `digit' in calls to the `printf' and `scanf' |
69 | functions. We have no limit, so return a reasonable value. */ |
70 | #define NL_ARGMAX _POSIX_ARG_MAX |
71 | |
72 | /* Maximum number of bytes in a `LANG' name. We have no limit. */ |
73 | #define NL_LANGMAX _POSIX2_LINE_MAX |
74 | |
75 | /* Maximum message number. We have no limit. */ |
76 | #define NL_MSGMAX INT_MAX |
77 | |
78 | /* Maximum number of bytes in N-to-1 collation mapping. We have no |
79 | limit. */ |
80 | #if defined __USE_GNU || !defined __USE_XOPEN2K8 |
81 | # define NL_NMAX INT_MAX |
82 | #endif |
83 | |
84 | /* Maximum set number. We have no limit. */ |
85 | #define NL_SETMAX INT_MAX |
86 | |
87 | /* Maximum number of bytes in a message. We have no limit. */ |
88 | #define NL_TEXTMAX INT_MAX |
89 | |
90 | /* Default process priority. */ |
91 | #define NZERO 20 |
92 | |
93 | |
94 | /* Number of bits in a word of type `int'. */ |
95 | #ifdef INT_MAX |
96 | # if INT_MAX == 32767 |
97 | # define WORD_BIT 16 |
98 | # else |
99 | # if INT_MAX == 2147483647 |
100 | # define WORD_BIT 32 |
101 | # else |
102 | /* Safe assumption. */ |
103 | # define WORD_BIT 64 |
104 | # endif |
105 | # endif |
106 | #elif defined __INT_MAX__ |
107 | # if __INT_MAX__ == 32767 |
108 | # define WORD_BIT 16 |
109 | # else |
110 | # if __INT_MAX__ == 2147483647 |
111 | # define WORD_BIT 32 |
112 | # else |
113 | /* Safe assumption. */ |
114 | # define WORD_BIT 64 |
115 | # endif |
116 | # endif |
117 | #else |
118 | # define WORD_BIT 32 |
119 | #endif |
120 | |
121 | /* Number of bits in a word of type `long int'. */ |
122 | #ifdef LONG_MAX |
123 | # if LONG_MAX == 2147483647 |
124 | # define LONG_BIT 32 |
125 | # else |
126 | /* Safe assumption. */ |
127 | # define LONG_BIT 64 |
128 | # endif |
129 | #elif defined __LONG_MAX__ |
130 | # if __LONG_MAX__ == 2147483647 |
131 | # define LONG_BIT 32 |
132 | # else |
133 | /* Safe assumption. */ |
134 | # define LONG_BIT 64 |
135 | # endif |
136 | #else |
137 | # include <bits/wordsize.h> |
138 | # if __WORDSIZE == 64 |
139 | # define LONG_BIT 64 |
140 | # else |
141 | # define LONG_BIT 32 |
142 | # endif |
143 | #endif |
144 | |
145 | #endif /* bits/xopen_lim.h */ |
146 | |