1 #ifndef _LIMITS_H
2 #define _LIMITS_H
3 
4 #include <features.h>
5 
6 /* Most limits are system-specific */
7 
8 #include <bits/limits.h>
9 
10 /* Support signed or unsigned plain-char */
11 
12 #if '\xff' > 0
13 #define CHAR_MIN 0
14 #define CHAR_MAX 255
15 #else
16 #define CHAR_MIN (-128)
17 #define CHAR_MAX 127
18 #endif
19 
20 /* Some universal constants... */
21 
22 #define CHAR_BIT 8
23 #define SCHAR_MIN (-128)
24 #define SCHAR_MAX 127
25 #define UCHAR_MAX 255
26 #define SHRT_MIN  (-1-0x7fff)
27 #define SHRT_MAX  0x7fff
28 #define USHRT_MAX 0xffff
29 #define INT_MIN  (-1-0x7fffffff)
30 #define INT_MAX  0x7fffffff
31 #define UINT_MAX 0xffffffffU
32 #define LONG_MIN (-LONG_MAX-1)
33 #define ULONG_MAX (2UL*LONG_MAX+1)
34 #define LLONG_MIN (-LLONG_MAX-1)
35 #define ULLONG_MAX (2ULL*LLONG_MAX+1)
36 
37 #define MB_LEN_MAX 4
38 
39 #if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
40  || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
41 
42 #define PIPE_BUF 4096
43 #define FILESIZEBITS 64
44 #define NAME_MAX 255
45 #define PATH_MAX 4096
46 #define NGROUPS_MAX 32
47 #define ARG_MAX 131072
48 #define IOV_MAX 1024
49 #define SYMLOOP_MAX 40
50 #define WORD_BIT 32
51 #define SSIZE_MAX LONG_MAX
52 #define TZNAME_MAX 6
53 #define TTY_NAME_MAX 32
54 #define HOST_NAME_MAX 255
55 
56 /* Implementation choices... */
57 
58 #define PTHREAD_KEYS_MAX 128
59 #define PTHREAD_STACK_MIN 2048
60 #define PTHREAD_DESTRUCTOR_ITERATIONS 4
61 #define SEM_VALUE_MAX 0x7fffffff
62 #define SEM_NSEMS_MAX 256
63 #define DELAYTIMER_MAX 0x7fffffff
64 #define MQ_PRIO_MAX 32768
65 #define LOGIN_NAME_MAX 256
66 
67 /* Arbitrary numbers... */
68 
69 #define BC_BASE_MAX 99
70 #define BC_DIM_MAX 2048
71 #define BC_SCALE_MAX 99
72 #define BC_STRING_MAX 1000
73 #define CHARCLASS_NAME_MAX 14
74 #define COLL_WEIGHTS_MAX 2
75 #define EXPR_NEST_MAX 32
76 #define LINE_MAX 4096
77 #define RE_DUP_MAX 255
78 
79 #define NL_ARGMAX 9
80 #define NL_MSGMAX 32767
81 #define NL_SETMAX 255
82 #define NL_TEXTMAX 2048
83 
84 #endif
85 
86 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) || defined(_XOPEN_SOURCE)
87 
88 #ifdef PAGESIZE
89 #define PAGE_SIZE PAGESIZE
90 #endif
91 #define NZERO 20
92 #define NL_LANGMAX 32
93 
94 #endif
95 
96 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) \
97  || (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE+0 < 700)
98 
99 #define NL_NMAX 16
100 
101 #endif
102 
103 /* POSIX/SUS requirements follow. These numbers come directly
104  * from SUS and have nothing to do with the host system. */
105 
106 #define _POSIX_AIO_LISTIO_MAX   2
107 #define _POSIX_AIO_MAX          1
108 #define _POSIX_ARG_MAX          4096
109 #define _POSIX_CHILD_MAX        25
110 #define _POSIX_CLOCKRES_MIN     20000000
111 #define _POSIX_DELAYTIMER_MAX   32
112 #define _POSIX_HOST_NAME_MAX    255
113 #define _POSIX_LINK_MAX         8
114 #define _POSIX_LOGIN_NAME_MAX   9
115 #define _POSIX_MAX_CANON        255
116 #define _POSIX_MAX_INPUT        255
117 #define _POSIX_MQ_OPEN_MAX      8
118 #define _POSIX_MQ_PRIO_MAX      32
119 #define _POSIX_NAME_MAX         14
120 #define _POSIX_NGROUPS_MAX      8
121 #define _POSIX_OPEN_MAX         20
122 #define _POSIX_PATH_MAX         256
123 #define _POSIX_PIPE_BUF         512
124 #define _POSIX_RE_DUP_MAX       255
125 #define _POSIX_RTSIG_MAX        8
126 #define _POSIX_SEM_NSEMS_MAX    256
127 #define _POSIX_SEM_VALUE_MAX    32767
128 #define _POSIX_SIGQUEUE_MAX     32
129 #define _POSIX_SSIZE_MAX        32767
130 #define _POSIX_STREAM_MAX       8
131 #define _POSIX_SS_REPL_MAX      4
132 #define _POSIX_SYMLINK_MAX      255
133 #define _POSIX_SYMLOOP_MAX      8
134 #define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4
135 #define _POSIX_THREAD_KEYS_MAX  128
136 #define _POSIX_THREAD_THREADS_MAX 64
137 #define _POSIX_TIMER_MAX        32
138 #define _POSIX_TRACE_EVENT_NAME_MAX 30
139 #define _POSIX_TRACE_NAME_MAX   8
140 #define _POSIX_TRACE_SYS_MAX    8
141 #define _POSIX_TRACE_USER_EVENT_MAX 32
142 #define _POSIX_TTY_NAME_MAX     9
143 #define _POSIX_TZNAME_MAX       6
144 #define _POSIX2_BC_BASE_MAX     99
145 #define _POSIX2_BC_DIM_MAX      2048
146 #define _POSIX2_BC_SCALE_MAX    99
147 #define _POSIX2_BC_STRING_MAX   1000
148 #define _POSIX2_CHARCLASS_NAME_MAX 14
149 #define _POSIX2_COLL_WEIGHTS_MAX 2
150 #define _POSIX2_EXPR_NEST_MAX   32
151 #define _POSIX2_LINE_MAX        2048
152 #define _POSIX2_RE_DUP_MAX      255
153 
154 #define _XOPEN_IOV_MAX          16
155 #define _XOPEN_NAME_MAX         255
156 #define _XOPEN_PATH_MAX         1024
157 
158 #endif
159