limits.h revision 1.14
1/* $NetBSD: limits.h,v 1.14 2012/03/28 17:03:29 christos Exp $ */ 2 3/* $OpenBSD: limits.h,v 1.2 2000/07/31 20:06:02 millert Exp $ */ 4 5/* 6 * Copyright (c) 1992-1994, The University of Utah and 7 * the Computer Systems Laboratory at the University of Utah (CSL). 8 * All rights reserved. 9 * 10 * Permission to use, copy, modify and distribute this software is hereby 11 * granted provided that (1) source code retains these copyright, permission, 12 * and disclaimer notices, and (2) redistributions including binaries 13 * reproduce the notices in supporting documentation, and (3) all advertising 14 * materials mentioning features or use of this software display the following 15 * acknowledgement: ``This product includes software developed by the 16 * Computer Systems Laboratory at the University of Utah.'' 17 * 18 * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS 19 * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF 20 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 21 * 22 * CSL requests users of this software to return to csl-dist@cs.utah.edu any 23 * improvements that they make and grant CSL redistribution rights. 24 * 25 * Utah $Hdr: limits.h 1.6 94/12/16$ 26 */ 27 28/* 29 * Copyright (c) 1988, 1993 30 * The Regents of the University of California. All rights reserved. 31 * 32 * Redistribution and use in source and binary forms, with or without 33 * modification, are permitted provided that the following conditions 34 * are met: 35 * 1. Redistributions of source code must retain the above copyright 36 * notice, this list of conditions and the following disclaimer. 37 * 2. Redistributions in binary form must reproduce the above copyright 38 * notice, this list of conditions and the following disclaimer in the 39 * documentation and/or other materials provided with the distribution. 40 * 3. Neither the name of the University nor the names of its contributors 41 * may be used to endorse or promote products derived from this software 42 * without specific prior written permission. 43 * 44 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 45 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 47 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 48 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 49 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 50 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 51 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 52 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 53 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 54 * SUCH DAMAGE. 55 * 56 * @(#)limits.h 8.3 (Berkeley) 1/4/94 57 */ 58 59#ifndef _MACHINE_LIMITS_H_ 60#define _MACHINE_LIMITS_H_ 61 62#include <sys/featuretest.h> 63 64#define CHAR_BIT 8 /* number of bits in a char */ 65 66/* 67 * According to ANSI (section 2.2.4.2), the values below must be usable by 68 * #if preprocessing directives. Additionally, the expression must have the 69 * same type as would an expression that is an object of the corresponding 70 * type converted according to the integral promotions. The subtraction for 71 * INT_MIN and LONG_MIN is so the value is not unsigned; 2147483648 is an 72 * unsigned int for 32-bit two's complement ANSI compilers (section 3.1.3.2). 73 * These numbers work for pcc as well. The UINT_MAX and ULONG_MAX values 74 * are written as hex so that GCC will be quiet about large integer constants. 75 */ 76#define UCHAR_MAX 0xff /* max value for an unsigned char */ 77#define SCHAR_MAX 0x7f /* max value for a signed char */ 78#define SCHAR_MIN (-0x7f-1) /* min value for a signed char */ 79 80#define USHRT_MAX 0xffff /* max value for an unsigned short */ 81#define SHRT_MAX 0x7fff /* max value for a short */ 82#define SHRT_MIN (-0x7fff-1) /* min value for a short */ 83 84#define UINT_MAX 0xffffffffU /* max value for an unsigned int */ 85#define INT_MAX 0x7fffffff /* max value for an int */ 86#define INT_MIN (-0x7fffffff-1) /* min value for an int */ 87 88#define ULONG_MAX 0xffffffffUL /* max value for an unsigned long */ 89#define LONG_MAX 0x7fffffffL /* max value for a long */ 90#define LONG_MIN (-0x7fffffffL-1) /* min value for a long */ 91 92#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \ 93 defined(_NETBSD_SOURCE) 94#define SSIZE_MAX INT_MAX /* max value for a ssize_t */ 95 96#if defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L || \ 97 defined(_NETBSD_SOURCE) 98#define ULLONG_MAX 0xffffffffffffffffULL /* max unsigned long long */ 99#define LLONG_MAX 0x7fffffffffffffffLL /* max signed long long */ 100#define LLONG_MIN (-0x7fffffffffffffffLL-1) /* min signed long long */ 101#endif 102 103#if defined(_NETBSD_SOURCE) 104#define SIZE_T_MAX UINT_MAX /* max value for a size_t */ 105 106#define UQUAD_MAX 0xffffffffffffffffULL /* max unsigned quad */ 107#define QUAD_MAX 0x7fffffffffffffffLL /* max signed quad */ 108#define QUAD_MIN (-0x7fffffffffffffffLL-1) /* min signed quad */ 109 110#endif /* _NETBSD_SOURCE */ 111#endif /* _POSIX_C_SOURCE || _XOPEN_SOURCE || _NETBSD_SOURCE */ 112 113#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) 114#define LONG_BIT 32 115#define WORD_BIT 32 116 117#ifndef DBL_DIG 118#ifdef __DBL_DIG__ 119#define DBL_DIG __DBL_DIG__ 120#else 121#define DBL_DIG 15 122#endif 123#endif 124 125#ifndef DBL_MAX 126#ifdef __DBL_MAX__ 127#define DBL_MAX __DBL_MAX__ 128#else 129#define DBL_MAX 1.7976931348623157E+308 130#endif 131#endif 132 133#ifndef DBL_MIN 134#ifdef __DBL_MIN__ 135#define DBL_MIN __DBL_MIN__ 136#else 137#define DBL_MIN 2.2250738585072014E-308 138#endif 139#endif 140 141#ifndef FLT_DIG 142#ifdef __FLT_DIG__ 143#define FLT_DIG __FLT_DIG__ 144#else 145#define FLT_DIG 6 146#endif 147#endif 148 149#ifndef FLT_MAX 150#ifdef __FLT_MAX__ 151#define FLT_MAX __FLT_MAX__ 152#else 153#define FLT_MAX 3.40282347E+38F 154#endif 155#endif 156 157#ifndef FLT_MIN 158#ifdef __FLT_MIN__ 159#define FLT_MIN __FLT_MIN__ 160#else 161#define FLT_MIN 1.17549435E-38F 162#endif 163#endif 164 165#endif 166 167#endif /* _MACHINE_LIMITS_H_ */ 168