_limits.h revision 114678
1/* 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)limits.h 8.3 (Berkeley) 1/4/94 34 * $FreeBSD: head/sys/i386/include/_limits.h 114678 2003-05-04 22:13:04Z kan $ 35 */ 36 37#ifndef _MACHINE__LIMITS_H_ 38#define _MACHINE__LIMITS_H_ 39 40#define __CHAR_BIT 8 /* number of bits in a char */ 41 42/* 43 * According to ANSI (section 2.2.4.2), the values below must be usable by 44 * #if preprocessing directives. Additionally, the expression must have the 45 * same type as would an expression that is an object of the corresponding 46 * type converted according to the integral promotions. The subtraction for 47 * INT_MIN, etc., is so the value is not unsigned; e.g., 0x80000000 is an 48 * unsigned int for 32-bit two's complement ANSI compilers (section 3.1.3.2). 49 * These numbers are for the default configuration of gcc. They work for 50 * some other compilers as well, but this should not be depended on. 51 */ 52 53#define __SCHAR_MAX 0x7f /* max value for a signed char */ 54#define __SCHAR_MIN (-0x7f - 1) /* min value for a signed char */ 55 56#define __UCHAR_MAX 0xff /* max value for an unsigned char */ 57 58#define __USHRT_MAX 0xffff /* max value for an unsigned short */ 59#define __SHRT_MAX 0x7fff /* max value for a short */ 60#define __SHRT_MIN (-0x7fff - 1) /* min value for a short */ 61 62#define __UINT_MAX 0xffffffffU /* max value for an unsigned int */ 63#define __INT_MAX 0x7fffffff /* max value for an int */ 64#define __INT_MIN (-0x7fffffff - 1) /* min value for an int */ 65 66/* Bad hack for gcc configured to give 64-bit longs. */ 67#ifdef _LARGE_LONG 68#define __ULONG_MAX 0xffffffffffffffffUL 69#define __LONG_MAX 0x7fffffffffffffffL 70#define __LONG_MIN (-0x7fffffffffffffffL - 1) 71#else 72#define __ULONG_MAX 0xffffffffUL /* max value for an unsigned long */ 73#define __LONG_MAX 0x7fffffffL /* max value for a long */ 74#define __LONG_MIN (-0x7fffffffL - 1) /* min value for a long */ 75#endif 76 77 /* max value for an unsigned long long */ 78#define __ULLONG_MAX 0xffffffffffffffffULL 79#define __LLONG_MAX 0x7fffffffffffffffLL /* max value for a long long */ 80#define __LLONG_MIN (-0x7fffffffffffffffLL - 1) /* min for a long long */ 81 82#define __SSIZE_MAX __INT_MAX /* max value for a ssize_t */ 83 84#define __SIZE_T_MAX __UINT_MAX /* max value for a size_t */ 85 86#define __OFF_MAX __LLONG_MAX /* max value for an off_t */ 87#define __OFF_MIN __LLONG_MIN /* min value for an off_t */ 88 89/* Quads and long longs are the same size. Ensure they stay in sync. */ 90#define __UQUAD_MAX __ULLONG_MAX /* max value for a uquad_t */ 91#define __QUAD_MAX __LLONG_MAX /* max value for a quad_t */ 92#define __QUAD_MIN __LLONG_MIN /* min value for a quad_t */ 93 94#ifdef _LARGE_LONG 95#define __LONG_BIT 64 96#else 97#define __LONG_BIT 32 98#endif 99#define __WORD_BIT 32 100 101#endif /* !_MACHINE__LIMITS_H_ */ 102