28ecec475f
This makes sure any system-defined limits are specified before the defaults are checked. Without this, ARG_MAX and PATH_MAX end up getting the default definitions from limits.h rather than the defines from syslimits.h. This could potentially cause problems when different files used different values for the same name. Signed-off-by: Keith Packard <keithp@keithp.com>
148 lines
3.8 KiB
C
148 lines
3.8 KiB
C
#ifndef _LIBC_LIMITS_H_
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# define _LIBC_LIMITS_H_ 1
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#include <newlib.h>
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#include <sys/cdefs.h>
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#include <sys/syslimits.h>
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# ifdef _MB_LEN_MAX
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# define MB_LEN_MAX _MB_LEN_MAX
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# else
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# define MB_LEN_MAX 1
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# endif
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/* Maximum number of positional arguments, if _WANT_IO_POS_ARGS. */
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# ifndef NL_ARGMAX
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# define NL_ARGMAX 32
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# endif
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/* if do not have #include_next support, then we
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have to define the limits here. */
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# if !defined __GNUC__ || __GNUC__ < 2
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# ifndef _LIMITS_H
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# define _LIMITS_H 1
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# include <sys/config.h>
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/* Number of bits in a `char'. */
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# undef CHAR_BIT
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# define CHAR_BIT 8
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/* Minimum and maximum values a `signed char' can hold. */
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# undef SCHAR_MIN
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# define SCHAR_MIN (-128)
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# undef SCHAR_MAX
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# define SCHAR_MAX 127
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/* Maximum value an `unsigned char' can hold. (Minimum is 0). */
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# undef UCHAR_MAX
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# define UCHAR_MAX 255
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/* Minimum and maximum values a `char' can hold. */
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# ifdef __CHAR_UNSIGNED__
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# undef CHAR_MIN
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# define CHAR_MIN 0
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# undef CHAR_MAX
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# define CHAR_MAX 255
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# else
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# undef CHAR_MIN
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# define CHAR_MIN (-128)
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# undef CHAR_MAX
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# define CHAR_MAX 127
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# endif
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/* Minimum and maximum values a `signed short int' can hold. */
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# undef SHRT_MIN
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/* For the sake of 16 bit hosts, we may not use -32768 */
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# define SHRT_MIN (-32767-1)
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# undef SHRT_MAX
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# define SHRT_MAX 32767
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/* Maximum value an `unsigned short int' can hold. (Minimum is 0). */
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# undef USHRT_MAX
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# define USHRT_MAX 65535
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/* Minimum and maximum values a `signed int' can hold. */
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# ifndef __INT_MAX__
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# define __INT_MAX__ 2147483647
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# endif
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# undef INT_MIN
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# define INT_MIN (-INT_MAX-1)
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# undef INT_MAX
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# define INT_MAX __INT_MAX__
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/* Maximum value an `unsigned int' can hold. (Minimum is 0). */
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# undef UINT_MAX
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# define UINT_MAX (INT_MAX * 2U + 1)
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/* Minimum and maximum values a `signed long int' can hold.
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(Same as `int'). */
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# ifndef __LONG_MAX__
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# if defined (__alpha__) || (defined (__sparc__) && defined(__arch64__)) || defined (__sparcv9)
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# define __LONG_MAX__ 9223372036854775807L
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# else
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# define __LONG_MAX__ 2147483647L
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# endif /* __alpha__ || sparc64 */
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# endif
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# undef LONG_MIN
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# define LONG_MIN (-LONG_MAX-1)
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# undef LONG_MAX
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# define LONG_MAX __LONG_MAX__
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/* Maximum value an `unsigned long int' can hold. (Minimum is 0). */
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# undef ULONG_MAX
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# define ULONG_MAX (LONG_MAX * 2UL + 1)
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# ifndef __LONG_LONG_MAX__
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# define __LONG_LONG_MAX__ 9223372036854775807LL
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# endif
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# if __ISO_C_VISIBLE >= 1999
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/* Minimum and maximum values a `signed long long int' can hold. */
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# undef LLONG_MIN
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# define LLONG_MIN (-LLONG_MAX-1)
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# undef LLONG_MAX
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# define LLONG_MAX __LONG_LONG_MAX__
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/* Maximum value an `unsigned long long int' can hold. (Minimum is 0). */
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# undef ULLONG_MAX
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# define ULLONG_MAX (LLONG_MAX * 2ULL + 1)
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# endif
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# if __GNU_VISIBLE
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/* Minimum and maximum values a `signed long long int' can hold. */
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# undef LONG_LONG_MIN
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# define LONG_LONG_MIN (-LONG_LONG_MAX-1)
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# undef LONG_LONG_MAX
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# define LONG_LONG_MAX __LONG_LONG_MAX__
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/* Maximum value an `unsigned long long int' can hold. (Minimum is 0). */
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# undef ULONG_LONG_MAX
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# define ULONG_LONG_MAX (LONG_LONG_MAX * 2ULL + 1)
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# endif
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# endif /* _LIMITS_H */
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# endif /* GCC 2. */
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#endif /* !_LIBC_LIMITS_H_ */
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#if defined __GNUC__ && !defined _GCC_LIMITS_H_
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/* `_GCC_LIMITS_H_' is what GCC's file defines. */
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# include_next <limits.h>
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#endif /* __GNUC__ && !_GCC_LIMITS_H_ */
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#ifndef _POSIX2_RE_DUP_MAX
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/* The maximum number of repeated occurrences of a regular expression
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* permitted when using the interval notation `\{M,N\}'. */
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#define _POSIX2_RE_DUP_MAX 255
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#endif /* _POSIX2_RE_DUP_MAX */
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#ifndef ARG_MAX
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#define ARG_MAX 4096
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#endif
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#ifndef PATH_MAX
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#define PATH_MAX 4096
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#endif
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