mingw/include/limits.h

   1 /*
   2  * limits.h
   3  * This file has no copyright assigned and is placed in the Public Domain.
   4  * This file is a part of the mingw-runtime package.
   5  * No warranty is given; refer to the file DISCLAIMER within the package.
   6  *
   7  * Functions for manipulating paths and directories (included from io.h)
   8  * plus functions for setting the current drive.
   9  *
  10  * Defines constants for the sizes of integral types.
  11  *
  12  * NOTE: GCC should supply a version of this header and it should be safe to
  13  *       use that version instead of this one (maybe safer).
  14  *
  15  */
  16
  17 #ifndef _LIMITS_H_
  18 #define _LIMITS_H_
  19
  20 /* All the headers include this file. */
  21 #include <_mingw.h>
  22
  23 /*
  24  * File system limits
  25  *
  26  * TODO: NAME_MAX and OPEN_MAX are file system limits or not? Are they the
  27  *       same as FILENAME_MAX and FOPEN_MAX from stdio.h?
  28  * NOTE: Apparently the actual size of PATH_MAX is 260, but a space is
  29  *       required for the NUL. TODO: Test?
  30  */
  31 #define PATH_MAX        259
  32
  33 /*
  34  * Characteristics of the char data type.
  35  *
  36  * TODO: Is MB_LEN_MAX correct?
  37  */
  38 #define CHAR_BIT        8
  39 #define MB_LEN_MAX      2
  40
  41 #define SCHAR_MIN       (-128)
  42 #define SCHAR_MAX       127
  43
  44 #define UCHAR_MAX       255
  45
  46 /* TODO: Is this safe? I think it might just be testing the preprocessor,
  47  *       not the compiler itself... */
  48 #if     ('\x80' < 0)
  49 #define CHAR_MIN        SCHAR_MIN
  50 #define CHAR_MAX        SCHAR_MAX
  51 #else
  52 #define CHAR_MIN        0
  53 #define CHAR_MAX        UCHAR_MAX
  54 #endif
  55
  56 /*
  57  * Maximum and minimum values for ints.
  58  */
  59 #define INT_MAX         2147483647
  60 #define INT_MIN         (-INT_MAX-1)
  61
  62 #define UINT_MAX        0xffffffff
  63
  64 /*
  65  * Maximum and minimum values for shorts.
  66  */
  67 #define SHRT_MAX        32767
  68 #define SHRT_MIN        (-SHRT_MAX-1)
  69
  70 #define USHRT_MAX       0xffff
  71
  72 /*
  73  * Maximum and minimum values for longs and unsigned longs.
  74  *
  75  * TODO: This is not correct for Alphas, which have 64 bit longs.
  76  */
  77 #define LONG_MAX        2147483647L
  78 #define LONG_MIN        (-LONG_MAX-1)
  79
  80 #define ULONG_MAX       0xffffffffUL
  81
  82 #ifndef __STRICT_ANSI__
  83 /* POSIX wants this.  */
  84 #define SSIZE_MAX LONG_MAX
  85 #endif
  86
  87 #if (defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) \
  88      || !defined(__STRICT_ANSI__)
  89 /* ISO C9x macro names */
  90 #define LLONG_MAX 9223372036854775807LL
  91 #define LLONG_MIN (-LLONG_MAX - 1)
  92 #define ULLONG_MAX (2ULL * LLONG_MAX + 1)
  93 #endif
  94
  95 /*
  96  * The GNU C compiler also allows 'long long int'
  97  */
  98 #if !defined(__STRICT_ANSI__) && defined(__GNUC__)
  99
 100 #define LONG_LONG_MAX   9223372036854775807LL
 101 #define LONG_LONG_MIN   (-LONG_LONG_MAX-1)
 102 #define ULONG_LONG_MAX  (2ULL * LONG_LONG_MAX + 1)
 103
 104 /* MSVC compatibility */
 105 #define _I64_MIN LONG_LONG_MIN
 106 #define _I64_MAX LONG_LONG_MAX
 107 #define _UI64_MAX ULONG_LONG_MAX
 108
 109 #endif /* Not Strict ANSI and GNU C compiler */
 110
 111
 112 #endif /* not _LIMITS_H_ */