81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
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/*
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* limits.h
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* This file has no copyright assigned and is placed in the Public Domain.
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* This file is a part of the mingw-runtime package.
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* No warranty is given; refer to the file DISCLAIMER within the package.
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*
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* Functions for manipulating paths and directories (included from io.h)
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* plus functions for setting the current drive.
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*
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* Defines constants for the sizes of integral types.
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*
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* NOTE: GCC should supply a version of this header and it should be safe to
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* use that version instead of this one (maybe safer).
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*
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*/
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#ifndef _LIMITS_H_
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#define _LIMITS_H_
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/* All the headers include this file. */
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/*
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* File system limits
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*
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* TODO: NAME_MAX and OPEN_MAX are file system limits or not? Are they the
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* same as FILENAME_MAX and FOPEN_MAX from stdio.h?
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* NOTE: Apparently the actual size of PATH_MAX is 260, but a space is
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* required for the NUL. TODO: Test?
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*/
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#define PATH_MAX (259)
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/*
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* Characteristics of the char data type.
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*
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* TODO: Is MB_LEN_MAX correct?
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*/
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#define CHAR_BIT 8
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#define MB_LEN_MAX 2
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#define SCHAR_MIN (-128)
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#define SCHAR_MAX 127
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#define UCHAR_MAX 255
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/* TODO: Is this safe? I think it might just be testing the preprocessor,
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* not the compiler itself... */
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#if ('\x80' < 0)
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#define CHAR_MIN SCHAR_MIN
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#define CHAR_MAX SCHAR_MAX
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#else
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#define CHAR_MIN 0
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#define CHAR_MAX UCHAR_MAX
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#endif
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/*
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* Maximum and minimum values for ints.
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*/
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#define INT_MAX 2147483647
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#define INT_MIN (-INT_MAX-1)
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#define UINT_MAX 0xffffffff
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/*
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* Maximum and minimum values for shorts.
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*/
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#define SHRT_MAX 32767
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#define SHRT_MIN (-SHRT_MAX-1)
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#define USHRT_MAX 0xffff
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/*
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* Maximum and minimum values for longs and unsigned longs.
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*
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* TODO: This is not correct for Alphas, which have 64 bit longs.
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*/
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#define LONG_MAX 2147483647L
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#define LONG_MIN (-LONG_MAX-1)
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#define ULONG_MAX 0xffffffffUL
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/*
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* The GNU C compiler also allows 'long long int'
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*/
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#define LONG_LONG_MAX 9223370L
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#define LONG_LONG_MIN (-LONG_LONG_MAX-1)
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#define ULONG_LONG_MAX (2ULL * LONG_LONG_MAX + 1)
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/* ISO C9x macro names */
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#define LLONG_MAX LONG_LONG_MAX
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#define LLONG_MIN LONG_LONG_MIN
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#define ULLONG_MAX ULONG_LONG_MAX
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/* MSVC compatibility */
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#define _I64_MIN LONG_LONG_MIN
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#define _I64_MAX LONG_LONG_MAX
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#define _UI64_MAX ULONG_LONG_MAX
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#endif /* not _LIMITS_H_ */
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