include/limits.h

   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