6 /* Most limits are system-specific */
8 #include <bits/limits.h>
10 /* Support signed or unsigned plain-char */
16 #define CHAR_MIN (-128)
20 /* Some universal constants... */
23 #define SCHAR_MIN (-128)
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)
39 #if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
40 || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
43 #define FILESIZEBITS 64
45 #define SYMLINK_MAX 255
47 #define NGROUPS_MAX 32
48 #define ARG_MAX 131072
50 #define SYMLOOP_MAX 40
52 #define SSIZE_MAX LONG_MAX
54 #define TTY_NAME_MAX 32
55 #define HOST_NAME_MAX 255
57 /* Implementation choices... */
59 #define PTHREAD_KEYS_MAX 128
60 #define PTHREAD_STACK_MIN 2048
61 #define PTHREAD_DESTRUCTOR_ITERATIONS 4
62 #define SEM_VALUE_MAX 0x7fffffff
63 #define SEM_NSEMS_MAX 256
64 #define DELAYTIMER_MAX 0x7fffffff
65 #define MQ_PRIO_MAX 32768
66 #define LOGIN_NAME_MAX 256
68 /* Arbitrary numbers... */
70 #define BC_BASE_MAX 99
71 #define BC_DIM_MAX 2048
72 #define BC_SCALE_MAX 99
73 #define BC_STRING_MAX 1000
74 #define CHARCLASS_NAME_MAX 14
75 #define COLL_WEIGHTS_MAX 2
76 #define EXPR_NEST_MAX 32
78 #define RE_DUP_MAX 255
81 #define NL_MSGMAX 32767
83 #define NL_TEXTMAX 2048
87 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) || defined(_XOPEN_SOURCE)
90 #define PAGE_SIZE PAGESIZE
97 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) \
98 || (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE+0 < 700)
104 /* POSIX/SUS requirements follow. These numbers come directly
105 * from SUS and have nothing to do with the host system. */
107 #define _POSIX_AIO_LISTIO_MAX 2
108 #define _POSIX_AIO_MAX 1
109 #define _POSIX_ARG_MAX 4096
110 #define _POSIX_CHILD_MAX 25
111 #define _POSIX_CLOCKRES_MIN 20000000
112 #define _POSIX_DELAYTIMER_MAX 32
113 #define _POSIX_HOST_NAME_MAX 255
114 #define _POSIX_LINK_MAX 8
115 #define _POSIX_LOGIN_NAME_MAX 9
116 #define _POSIX_MAX_CANON 255
117 #define _POSIX_MAX_INPUT 255
118 #define _POSIX_MQ_OPEN_MAX 8
119 #define _POSIX_MQ_PRIO_MAX 32
120 #define _POSIX_NAME_MAX 14
121 #define _POSIX_NGROUPS_MAX 8
122 #define _POSIX_OPEN_MAX 20
123 #define _POSIX_PATH_MAX 256
124 #define _POSIX_PIPE_BUF 512
125 #define _POSIX_RE_DUP_MAX 255
126 #define _POSIX_RTSIG_MAX 8
127 #define _POSIX_SEM_NSEMS_MAX 256
128 #define _POSIX_SEM_VALUE_MAX 32767
129 #define _POSIX_SIGQUEUE_MAX 32
130 #define _POSIX_SSIZE_MAX 32767
131 #define _POSIX_STREAM_MAX 8
132 #define _POSIX_SS_REPL_MAX 4
133 #define _POSIX_SYMLINK_MAX 255
134 #define _POSIX_SYMLOOP_MAX 8
135 #define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4
136 #define _POSIX_THREAD_KEYS_MAX 128
137 #define _POSIX_THREAD_THREADS_MAX 64
138 #define _POSIX_TIMER_MAX 32
139 #define _POSIX_TRACE_EVENT_NAME_MAX 30
140 #define _POSIX_TRACE_NAME_MAX 8
141 #define _POSIX_TRACE_SYS_MAX 8
142 #define _POSIX_TRACE_USER_EVENT_MAX 32
143 #define _POSIX_TTY_NAME_MAX 9
144 #define _POSIX_TZNAME_MAX 6
145 #define _POSIX2_BC_BASE_MAX 99
146 #define _POSIX2_BC_DIM_MAX 2048
147 #define _POSIX2_BC_SCALE_MAX 99
148 #define _POSIX2_BC_STRING_MAX 1000
149 #define _POSIX2_CHARCLASS_NAME_MAX 14
150 #define _POSIX2_COLL_WEIGHTS_MAX 2
151 #define _POSIX2_EXPR_NEST_MAX 32
152 #define _POSIX2_LINE_MAX 2048
153 #define _POSIX2_RE_DUP_MAX 255
155 #define _XOPEN_IOV_MAX 16
156 #define _XOPEN_NAME_MAX 255
157 #define _XOPEN_PATH_MAX 1024