1/* Copyright (C) 1996-2016 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#define NL_NMAX INT_MAX
81
82/* Maximum set number. We have no limit. */
83#define NL_SETMAX INT_MAX
84
85/* Maximum number of bytes in a message. We have no limit. */
86#define NL_TEXTMAX INT_MAX
87
88/* Default process priority. */
89#define NZERO 20
90
91
92/* Number of bits in a word of type `int'. */
93#ifdef INT_MAX
94# if INT_MAX == 32767
95# define WORD_BIT 16
96# else
97# if INT_MAX == 2147483647
98# define WORD_BIT 32
99# else
100/* Safe assumption. */
101# define WORD_BIT 64
102# endif
103# endif
104#elif defined __INT_MAX__
105# if __INT_MAX__ == 32767
106# define WORD_BIT 16
107# else
108# if __INT_MAX__ == 2147483647
109# define WORD_BIT 32
110# else
111/* Safe assumption. */
112# define WORD_BIT 64
113# endif
114# endif
115#else
116# define WORD_BIT 32
117#endif
118
119/* Number of bits in a word of type `long int'. */
120#ifdef LONG_MAX
121# if LONG_MAX == 2147483647
122# define LONG_BIT 32
123# else
124/* Safe assumption. */
125# define LONG_BIT 64
126# endif
127#elif defined __LONG_MAX__
128# if __LONG_MAX__ == 2147483647
129# define LONG_BIT 32
130# else
131/* Safe assumption. */
132# define LONG_BIT 64
133# endif
134#else
135# include <bits/wordsize.h>
136# if __WORDSIZE == 64
137# define LONG_BIT 64
138# else
139# define LONG_BIT 32
140# endif
141#endif
142
143#endif /* bits/xopen_lim.h */
144