limits.h revision 1.4
1/* $OpenBSD: limits.h,v 1.4 2002/03/05 19:11:23 miod Exp $ */ 2 3/* 4 * Copyright (c) 1992-1994, The University of Utah and 5 * the Computer Systems Laboratory at the University of Utah (CSL). 6 * All rights reserved. 7 * 8 * Permission to use, copy, modify and distribute this software is hereby 9 * granted provided that (1) source code retains these copyright, permission, 10 * and disclaimer notices, and (2) redistributions including binaries 11 * reproduce the notices in supporting documentation, and (3) all advertising 12 * materials mentioning features or use of this software display the following 13 * acknowledgement: ``This product includes software developed by the 14 * Computer Systems Laboratory at the University of Utah.'' 15 * 16 * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS 17 * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF 18 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 19 * 20 * CSL requests users of this software to return to csl-dist@cs.utah.edu any 21 * improvements that they make and grant CSL redistribution rights. 22 * 23 * Utah $Hdr: limits.h 1.6 94/12/16$ 24 */ 25 26/* 27 * Copyright (c) 1988, 1993 28 * The Regents of the University of California. All rights reserved. 29 * 30 * Redistribution and use in source and binary forms, with or without 31 * modification, are permitted provided that the following conditions 32 * are met: 33 * 1. Redistributions of source code must retain the above copyright 34 * notice, this list of conditions and the following disclaimer. 35 * 2. Redistributions in binary form must reproduce the above copyright 36 * notice, this list of conditions and the following disclaimer in the 37 * documentation and/or other materials provided with the distribution. 38 * 3. All advertising materials mentioning features or use of this software 39 * must display the following acknowledgement: 40 * This product includes software developed by the University of 41 * California, Berkeley and its contributors. 42 * 4. Neither the name of the University nor the names of its contributors 43 * may be used to endorse or promote products derived from this software 44 * without specific prior written permission. 45 * 46 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 47 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 48 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 49 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 50 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 51 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 52 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 53 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 54 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 55 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 56 * SUCH DAMAGE. 57 * 58 * @(#)limits.h 8.3 (Berkeley) 1/4/94 59 */ 60 61#ifndef _MACHINE_LIMITS_H_ 62#define _MACHINE_LIMITS_H_ 63 64#define CHAR_BIT 8 /* number of bits in a char */ 65#define MB_LEN_MAX 6 /* Allow 31 bit UTF2 */ 66 67 68#ifdef _KERNEL 69#define CLK_TCK 60 /* ticks per second */ 70#endif 71 72/* 73 * According to ANSI (section 2.2.4.2), the values below must be usable by 74 * #if preprocessing directives. Additionally, the expression must have the 75 * same type as would an expression that is an object of the corresponding 76 * type converted according to the integral promotions. The subtraction for 77 * INT_MIN and LONG_MIN is so the value is not unsigned; 2147483648 is an 78 * unsigned int for 32-bit two's complement ANSI compilers (section 3.1.3.2). 79 * These numbers work for pcc as well. The UINT_MAX and ULONG_MAX values 80 * are written as hex so that GCC will be quiet about large integer constants. 81 */ 82#define SCHAR_MAX 127 /* min value for a signed char */ 83#define SCHAR_MIN (-128) /* max value for a signed char */ 84 85#define UCHAR_MAX 255 /* max value for an unsigned char */ 86#define CHAR_MAX 127 /* max value for a char */ 87#define CHAR_MIN (-128) /* min value for a char */ 88 89#define USHRT_MAX 65535 /* max value for an unsigned short */ 90#define SHRT_MAX 32767 /* max value for a short */ 91#define SHRT_MIN (-32768) /* min value for a short */ 92 93#define UINT_MAX 0xffffffff /* max value for an unsigned int */ 94#define INT_MAX 2147483647 /* max value for an int */ 95#define INT_MIN (-2147483647-1) /* min value for an int */ 96 97#define ULONG_MAX 0xffffffffUL /* max value for an unsigned long */ 98#define LONG_MAX 2147483647L /* max value for a long */ 99#define LONG_MIN (-2147483647-1) /* min value for a long */ 100 101#if !defined(_ANSI_SOURCE) 102#define SSIZE_MAX INT_MAX /* max value for a ssize_t */ 103 104#if !defined(_POSIX_SOURCE) 105#define SIZE_T_MAX UINT_MAX /* max value for a size_t */ 106 107#define UID_MAX UINT_MAX /* max value for a uid_t */ 108#define GID_MAX UINT_MAX /* max value for a gid_t */ 109 110/* GCC requires that quad constants be written as expressions. */ 111#define UQUAD_MAX ((u_quad_t)0-1) /* max value for a uquad_t */ 112 /* max value for a quad_t */ 113#define QUAD_MAX ((quad_t)(UQUAD_MAX >> 1)) 114#define QUAD_MIN (-QUAD_MAX-1) /* min value for a quad_t */ 115#define ULLONG_MAX (UQUAD_MAX) /* max value for unsigned long long */ 116#define LLONG_MAX (QUAD_MAX) /* max value for a signed long long */ 117#define LLONG_MIN (QUAD_MIN) /* min value for a signed long long */ 118 119#endif /* !_POSIX_SOURCE */ 120#endif /* !_ANSI_SOURCE */ 121 122#if (!defined(_ANSI_SOURCE)&&!defined(_POSIX_SOURCE)) || defined(_XOPEN_SOURCE) 123#define LONG_BIT 32 124#define WORD_BIT 32 125 126#define DBL_DIG 15 127#define DBL_MAX 1.7976931348623157E+308 128#define DBL_MIN 2.2250738585072014E-308 129 130#define FLT_DIG 6 131#define FLT_MAX 3.40282347E+38F 132#define FLT_MIN 1.17549435E-38F 133#endif 134 135#endif /* _MACHINE_LIMITS_H_ */ 136