reactos/include/crt/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 #define CHAR_BIT        8
  37 #define MB_LEN_MAX      2
  38
  39 #define SCHAR_MIN       (-128)
  40 #define SCHAR_MAX       127
  41
  42 #define UCHAR_MAX       255
  43
  44 /* TODO: Is this safe? I think it might just be testing the preprocessor,
  45  *       not the compiler itself... */
  46 #if     ('\x80' < 0)
  47 #define CHAR_MIN        SCHAR_MIN
  48 #define CHAR_MAX        SCHAR_MAX
  49 #else
  50 #define CHAR_MIN        0
  51 #define CHAR_MAX        UCHAR_MAX
  52 #endif
  53
  54 /*
  55  * Maximum and minimum values for ints.
  56  */
  57 #define INT_MAX         2147483647
  58 #define INT_MIN         (-INT_MAX-1)
  59
  60 #define UINT_MAX        0xffffffff
  61
  62 /*
  63  * Maximum and minimum values for shorts.
  64  */
  65 #define SHRT_MAX        32767
  66 #define SHRT_MIN        (-SHRT_MAX-1)
  67
  68 #define USHRT_MAX       0xffff
  69
  70 /*
  71  * Maximum and minimum values for longs and unsigned longs.
  72  *
  73  * TODO: This is not correct for Alphas, which have 64 bit longs.
  74  */
  75 #define LONG_MAX        2147483647L
  76 #define LONG_MIN        (-LONG_MAX-1)
  77
  78 #define ULONG_MAX       0xffffffffUL
  79
  80 #ifndef __STRICT_ANSI__
  81 /* POSIX wants this.  */
  82 #define SSIZE_MAX LONG_MAX
  83 #endif
  84
  85 #if (defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) \
  86      || !defined(__STRICT_ANSI__)
  87 /* ISO C9x macro names */
  88 #define LLONG_MAX 9223372036854775807LL
  89 #define LLONG_MIN (-LLONG_MAX - 1)
  90 #define ULLONG_MAX (2ULL * LLONG_MAX + 1)
  91 #endif
  92
  93 /*
  94  * The GNU C compiler also allows 'long long int'
  95  */
  96 #if !defined(__STRICT_ANSI__) && defined(__GNUC__)
  97
  98 #define LONG_LONG_MAX   9223372036854775807LL
  99 #define LONG_LONG_MIN   (-LONG_LONG_MAX-1)
 100 #define ULONG_LONG_MAX  (2ULL * LONG_LONG_MAX + 1)
 101
 102 /* MSVC compatibility */
 103 #define _I64_MIN LONG_LONG_MIN
 104 #define _I64_MAX LONG_LONG_MAX
 105 #define _UI64_MAX ULONG_LONG_MAX
 106
 107 #endif /* Not Strict ANSI and GNU C compiler */
 108
 109
 110 #endif /* not _LIMITS_H_ */