about summary refs log tree commit diff
path: root/include/limits.h
blob: 574b406ad33555c067763bd938612a92fe5135ba (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
#ifndef _LIMITS_H
#define _LIMITS_H

#include <features.h>

/* Most limits are system-specific */

#include <bits/limits.h>

/* Support signed or unsigned plain-char */

#if '\0'-1 > 0
#define CHAR_MIN 0
#define CHAR_MAX 255
#else
#define CHAR_MIN (-128)
#define CHAR_MAX 127
#endif

/* Some universal constants... */

#define CHAR_BIT 8
#define SCHAR_MIN (-128)
#define SCHAR_MAX 127
#define UCHAR_MAX 255
#define SHRT_MIN  (-1-0x7fff)
#define SHRT_MAX  0x7fff
#define USHRT_MAX 0xffff
#define INT_MIN  (-1-0x7fffffff)
#define INT_MAX  0x7fffffff
#define UINT_MAX 0xffffffffU
#define LONG_MIN (-LONG_MAX-1)
#define ULONG_MAX (2UL*LONG_MAX+1)
#define LLONG_MIN (-LLONG_MAX-1)
#define ULLONG_MAX (2ULL*LLONG_MAX+1)

#define MB_LEN_MAX 4

#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
 || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)

#define PIPE_BUF 4096
#ifdef PAGE_SIZE
#define PAGESIZE PAGE_SIZE
#endif
#define FILESIZEBITS 64
#define NAME_MAX 255
#define SYMLINK_MAX 255
#define PATH_MAX 4096
#define NZERO 20
#define NGROUPS_MAX 32
#define ARG_MAX 131072
#define IOV_MAX 1024
#define SYMLOOP_MAX 40
#define WORD_BIT 32
#define SSIZE_MAX LONG_MAX
#define TZNAME_MAX 6
#define TTY_NAME_MAX 20
#define HOST_NAME_MAX 255

/* Implementation choices... */

#define PTHREAD_KEYS_MAX 128
#define PTHREAD_STACK_MIN 2048
#define PTHREAD_DESTRUCTOR_ITERATIONS 4
#define SEM_VALUE_MAX 0x7fffffff
#define SEM_NSEMS_MAX 256
#define DELAYTIMER_MAX 0x7fffffff
#define MQ_PRIO_MAX 32768
#define LOGIN_NAME_MAX 256

/* Arbitrary numbers... */

#define BC_BASE_MAX 99
#define BC_DIM_MAX 2048
#define BC_SCALE_MAX 99
#define BC_STRING_MAX 1000
#define CHARCLASS_NAME_MAX 14
#define COLL_WEIGHTS_MAX 2
#define EXPR_NEST_MAX 32
#define LINE_MAX 4096
#define RE_DUP_MAX 255

#define NL_ARGMAX 9
#define NL_LANGMAX 32
#define NL_MSGMAX 32767
#define NL_SETMAX 255
#define NL_TEXTMAX 2048

#endif

#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) \
 || (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE+0 < 700)

#define NL_NMAX 16

#endif

/* POSIX/SUS requirements follow. These numbers come directly
 * from SUS and have nothing to do with the host system. */

#define _POSIX_AIO_LISTIO_MAX   2
#define _POSIX_AIO_MAX          1
#define _POSIX_ARG_MAX          4096
#define _POSIX_CHILD_MAX        25
#define _POSIX_CLOCKRES_MIN     20000000
#define _POSIX_DELAYTIMER_MAX   32
#define _POSIX_HOST_NAME_MAX    255
#define _POSIX_LINK_MAX         8
#define _POSIX_LOGIN_NAME_MAX   9
#define _POSIX_MAX_CANON        255
#define _POSIX_MAX_INPUT        255
#define _POSIX_MQ_OPEN_MAX      8
#define _POSIX_MQ_PRIO_MAX      32
#define _POSIX_NAME_MAX         14
#define _POSIX_NGROUPS_MAX      8
#define _POSIX_OPEN_MAX         20
#define _POSIX_PATH_MAX         256
#define _POSIX_PIPE_BUF         512
#define _POSIX_RE_DUP_MAX       255
#define _POSIX_RTSIG_MAX        8
#define _POSIX_SEM_NSEMS_MAX    256
#define _POSIX_SEM_VALUE_MAX    32767
#define _POSIX_SIGQUEUE_MAX     32
#define _POSIX_SSIZE_MAX        32767
#define _POSIX_STREAM_MAX       8
#define _POSIX_SS_REPL_MAX      4
#define _POSIX_SYMLINK_MAX      255
#define _POSIX_SYMLOOP_MAX      8
#define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4
#define _POSIX_THREAD_KEYS_MAX  128
#define _POSIX_THREAD_THREADS_MAX 64
#define _POSIX_TIMER_MAX        32
#define _POSIX_TRACE_EVENT_NAME_MAX 30
#define _POSIX_TRACE_NAME_MAX   8
#define _POSIX_TRACE_SYS_MAX    8
#define _POSIX_TRACE_USER_EVENT_MAX 32
#define _POSIX_TTY_NAME_MAX     9
#define _POSIX_TZNAME_MAX       6
#define _POSIX2_BC_BASE_MAX     99
#define _POSIX2_BC_DIM_MAX      2048
#define _POSIX2_BC_SCALE_MAX    99
#define _POSIX2_BC_STRING_MAX   1000
#define _POSIX2_CHARCLASS_NAME_MAX 14
#define _POSIX2_COLL_WEIGHTS_MAX 2
#define _POSIX2_EXPR_NEST_MAX   32
#define _POSIX2_LINE_MAX        2048
#define _POSIX2_RE_DUP_MAX      255

#define _XOPEN_IOV_MAX          16
#define _XOPEN_NAME_MAX         255
#define _XOPEN_PATH_MAX         1024

#endif