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limits.h revision 1.14 
      1 /* $NetBSD: limits.h,v 1.14 2012/03/28 17:03:27 christos Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1988, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  *
     31  *	@(#)limits.h	8.3 (Berkeley) 1/4/94
     32  */
     33 
     34 #ifndef	_MACHINE_LIMITS_H_
     35 #define	_MACHINE_LIMITS_H_
     36 
     37 #include <sys/featuretest.h>
     38 
     39 #define	CHAR_BIT	8		/* number of bits in a char */
     40 
     41 /*
     42  * According to ANSI (section 2.2.4.2), the values below must be usable by
     43  * #if preprocessing directives.  Additionally, the expression must have the
     44  * same type as would an expression that is an object of the corresponding
     45  * type converted according to the integral promotions.  The subtraction for
     46  * INT_MIN and LONG_MIN is so the value is not unsigned; 2147483648 is an
     47  * unsigned int for 32-bit two's complement ANSI compilers (section 3.1.3.2).
     48  * These numbers work for pcc as well.  The UINT_MAX and ULONG_MAX values
     49  * are written as hex so that GCC will be quiet about large integer constants.
     50  */
     51 #define	UCHAR_MAX	0xff		/* max value for an unsigned char */
     52 #define	SCHAR_MAX	0x7f		/* max value for a signed char */
     53 #define	SCHAR_MIN	(-0x7f-1)	/* min value for a signed char */
     54 
     55 #define	USHRT_MAX	0xffff		/* max value for an unsigned short */
     56 #define	SHRT_MAX	0x7fff		/* max value for a short */
     57 #define	SHRT_MIN	(-0x7fff-1)	/* min value for a short */
     58 
     59 #define	UINT_MAX	0xffffffffU	/* max value for an unsigned int */
     60 #define	INT_MAX		0x7fffffff	/* max value for an int */
     61 #define	INT_MIN		(-0x7fffffff-1)	/* min value for an int */
     62 
     63 #define	ULONG_MAX	0xffffffffffffffffUL	/* max for an unsigned long */
     64 #define	LONG_MAX	0x7fffffffffffffffL	/* max for a long */
     65 #define	LONG_MIN	(-0x7fffffffffffffffL-1) /* min for a long */
     66 
     67 #if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
     68     defined(_NETBSD_SOURCE)
     69 #define	SSIZE_MAX	LONG_MAX	/* max value for a ssize_t */
     70 
     71 #if defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L || \
     72     defined(_NETBSD_SOURCE)
     73 #define	ULLONG_MAX	0xffffffffffffffffULL	/* max unsigned long long */
     74 #define	LLONG_MAX	0x7fffffffffffffffLL	/* max signed long long */
     75 #define	LLONG_MIN	(-0x7fffffffffffffffLL-1) /* min signed long long */
     76 #endif
     77 
     78 #if defined(_NETBSD_SOURCE)
     79 #define	SIZE_T_MAX	ULONG_MAX	/* max value for a size_t */
     80 
     81 /* Quads and longs are the same on the alpha */
     82 #define	UQUAD_MAX	(ULONG_MAX)	/* max value for a uquad_t */
     83 #define	QUAD_MAX	(LONG_MAX)	/* max value for a quad_t */
     84 #define	QUAD_MIN	(LONG_MIN)	/* min value for a quad_t */
     85 
     86 #endif /* _NETBSD_SOURCE */
     87 #endif /* _POSIX_C_SOURCE || _XOPEN_SOURCE || _NETBSD_SOURCE */
     88 
     89 #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
     90 #define	LONG_BIT	64
     91 #define	WORD_BIT	32
     92 
     93 #define	DBL_DIG		15
     94 #define	DBL_MAX		1.7976931348623157E+308
     95 #define	DBL_MIN		2.2250738585072014E-308
     96 
     97 #define	FLT_DIG		6
     98 #define	FLT_MAX		3.40282347E+38F
     99 #define	FLT_MIN		1.17549435E-38F
    100 #endif
    101 
    102 #endif /* _MACHINE_LIMITS_H_ */
    103