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limits.h revision 1.1.1.2 
      1 /*	$OpenBSD: limits.h,v 1.1.1.1 1996/06/24 09:07:17 pefo Exp $	*/
      2 /*	$NetBSD: limits.h,v 1.1.1.2 2000/01/23 20:24:28 soda Exp $	*/
      3 
      4 /*
      5  * Copyright (c) 1988, 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  *	@(#)limits.h	8.3 (Berkeley) 1/4/94
     37  */
     38 
     39 #define	CHAR_BIT	8		/* number of bits in a char */
     40 #define	MB_LEN_MAX	6		/* Allow 31 bit UTF2 */
     41 
     42 #ifdef _KERNEL
     43 #define	CLK_TCK		100		/* ticks per second */
     44 #endif
     45 
     46 /*
     47  * According to ANSI (section 2.2.4.2), the values below must be usable by
     48  * #if preprocessing directives.  Additionally, the expression must have the
     49  * same type as would an expression that is an object of the corresponding
     50  * type converted according to the integral promotions.  The subtraction for
     51  * INT_MIN and LONG_MIN is so the value is not unsigned; 2147483648 is an
     52  * unsigned int for 32-bit two's complement ANSI compilers (section 3.1.3.2).
     53  * These numbers work for pcc as well.  The UINT_MAX and ULONG_MAX values
     54  * are written as hex so that GCC will be quiet about large integer constants.
     55  */
     56 #define	SCHAR_MAX	127		/* min value for a signed char */
     57 #define	SCHAR_MIN	(-128)		/* max value for a signed char */
     58 
     59 #define	UCHAR_MAX	255		/* max value for an unsigned char */
     60 #define	CHAR_MAX	127		/* max value for a char */
     61 #define	CHAR_MIN	(-128)		/* min value for a char */
     62 
     63 #define	USHRT_MAX	65535		/* max value for an unsigned short */
     64 #define	SHRT_MAX	32767		/* max value for a short */
     65 #define	SHRT_MIN	(-32768)	/* min value for a short */
     66 
     67 #define	UINT_MAX	0xffffffff	/* max value for an unsigned int */
     68 #define	INT_MAX		2147483647	/* max value for an int */
     69 #define	INT_MIN		(-2147483647-1)	/* min value for an int */
     70 
     71 #define	ULONG_MAX	0xffffffff	/* max value for an unsigned long */
     72 #define	LONG_MAX	2147483647	/* max value for a long */
     73 #define	LONG_MIN	(-2147483647-1)	/* min value for a long */
     74 
     75 #if !defined(_ANSI_SOURCE)
     76 #define	SSIZE_MAX	INT_MAX		/* max value for a ssize_t */
     77 
     78 #if !defined(_POSIX_SOURCE) && !defined(_XOPEN_SOURCE)
     79 #define	SIZE_T_MAX	UINT_MAX	/* max value for a size_t */
     80 
     81 /* GCC requires that quad constants be written as expressions. */
     82 #define	UQUAD_MAX	((u_quad_t)0-1)	/* max value for a uquad_t */
     83 					/* max value for a quad_t */
     84 #define	QUAD_MAX	((quad_t)(UQUAD_MAX >> 1))
     85 #define	QUAD_MIN	(-QUAD_MAX-1)	/* min value for a quad_t */
     86 
     87 #endif /* !_POSIX_SOURCE && !_XOPEN_SOURCE */
     88 #endif /* !_ANSI_SOURCE */
     89 
     90 #if (!defined(_ANSI_SOURCE)&&!defined(_POSIX_SOURCE)) || defined(_XOPEN_SOURCE)
     91 #define LONG_BIT	32
     92 #define WORD_BIT	32
     93 
     94 #define DBL_DIG		15
     95 #define DBL_MAX		1.797693134862316E+308
     96 #define DBL_MIN		2.225073858507201E-308
     97 
     98 #define FLT_DIG		6
     99 #define FLT_MAX		3.40282347E+38F
    100 #define FLT_MIN		1.17549435E-38F
    101 #endif
    102