limits.h revision 99129
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 * From: NetBSD: limits.h,v 1.3 1997/04/06 08:47:31 cgd Exp 35 * From: FreeBSD: src/sys/alpha/include/limits.h,v 1.8 2001/11/02 36 * $FreeBSD: head/sys/amd64/include/limits.h 99129 2002-06-30 08:57:17Z obrien $ 37 */ 38 39#ifndef _MACHINE_LIMITS_H_ 40#define _MACHINE_LIMITS_H_ 41 42#define CHAR_BIT 8 /* number of bits in a char */ 43#define MB_LEN_MAX 6 /* Allow 31 bit UTF2 */ 44 45/* 46 * According to ANSI (section 2.2.4.2), the values below must be usable by 47 * #if preprocessing directives. Additionally, the expression must have the 48 * same type as would an expression that is an object of the corresponding 49 * type converted according to the integral promotions. The subtraction for 50 * INT_MIN, etc., is so the value is not unsigned; e.g., 0x80000000 is an 51 * unsigned int for 32-bit two's complement ANSI compilers (section 3.1.3.2). 52 * These numbers are for the default configuration of gcc. They work for 53 * some other compilers as well, but this should not be depended on. 54 */ 55#define SCHAR_MAX 0x7f /* max value for a signed char */ 56#define SCHAR_MIN (-0x7f-1) /* min value for a signed char */ 57 58#define UCHAR_MAX 0xffU /* max value for an unsigned char */ 59#define CHAR_MAX 0x7f /* max value for a char */ 60#define CHAR_MIN (-0x7f-1) /* min value for a char */ 61 62#define USHRT_MAX 0xffffU /* max value for an unsigned short */ 63#define SHRT_MAX 0x7fff /* max value for a short */ 64#define SHRT_MIN (-0x7fff-1) /* min value for a short */ 65 66#define UINT_MAX 0xffffffffU /* max value for an unsigned int */ 67#define INT_MAX 0x7fffffff /* max value for an int */ 68#define INT_MIN (-0x7fffffff-1) /* min value for an int */ 69 70#define ULONG_MAX 0xffffffffffffffffUL /* max for an unsigned long */ 71#define LONG_MAX 0x7fffffffffffffffL /* max for a long */ 72#define LONG_MIN (-0x7fffffffffffffffL-1) /* min for a long */ 73 74/* Long longs and longs are the same size on the alpha. */ 75 /* max for an unsigned long long */ 76#define ULLONG_MAX 0xffffffffffffffffULL 77#define LLONG_MAX 0x7fffffffffffffffLL /* max for a long long */ 78#define LLONG_MIN (-0x7fffffffffffffffLL-1) /* min for a long long */ 79 80#if !defined(_ANSI_SOURCE) 81#define SSIZE_MAX LONG_MAX /* max value for a ssize_t */ 82 83#if !defined(_POSIX_SOURCE) && !defined(_XOPEN_SOURCE) 84#define SIZE_T_MAX ULONG_MAX /* max value for a size_t */ 85 86#define OFF_MAX LONG_MAX /* max value for a off_t */ 87#define OFF_MIN LONG_MIN /* min value for a off_t */ 88 89/* Quads and longs are the same on the alpha. Ensure they stay in sync. */ 90#define UQUAD_MAX (ULONG_MAX) /* max value for a uquad_t */ 91#define QUAD_MAX (LONG_MAX) /* max value for a quad_t */ 92#define QUAD_MIN (LONG_MIN) /* min value for a quad_t */ 93 94#if !defined(__cplusplus) || defined(__STDC_LIMIT_MACROS) 95/* 96 * ISO/IEC 9899:1999 97 * 7.18.2.1 Limits of exact-width integer types 98 */ 99/* Minimum values of exact-width signed integer types. */ 100#define INT8_MIN (-0x7f-1) 101#define INT16_MIN (-0x7fff-1) 102#define INT32_MIN (-0x7fffffff-1) 103#define INT64_MIN (-0x7fffffffffffffffL-1) 104 105/* Maximum values of exact-width signed integer types. */ 106#define INT8_MAX 0x7f 107#define INT16_MAX 0x7fff 108#define INT32_MAX 0x7fffffff 109#define INT64_MAX 0x7fffffffffffffffL 110 111/* Maximum values of exact-width unsigned integer types. */ 112#define UINT8_MAX 0xff 113#define UINT16_MAX 0xffff 114#define UINT32_MAX 0xffffffffU 115#define UINT64_MAX 0xffffffffffffffffUL 116 117/* 118 * ISO/IEC 9899:1999 119 * 7.18.2.2 Limits of minimum-width integer types 120 */ 121/* Minimum values of minimum-width signed integer types. */ 122#define INT_LEAST8_MIN SCHAR_MIN 123#define INT_LEAST16_MIN SHRT_MIN 124#define INT_LEAST32_MIN INT_MIN 125#define INT_LEAST64_MIN LONG_MIN 126 127/* Maximum values of minimum-width signed integer types. */ 128#define INT_LEAST8_MAX SCHAR_MAX 129#define INT_LEAST16_MAX SHRT_MAX 130#define INT_LEAST32_MAX INT_MAX 131#define INT_LEAST64_MAX LONG_MAX 132 133/* Maximum values of minimum-width unsigned integer types. */ 134#define UINT_LEAST8_MAX UCHAR_MAX 135#define UINT_LEAST16_MAX USHRT_MAX 136#define UINT_LEAST32_MAX UINT_MAX 137#define UINT_LEAST64_MAX ULONG_MAX 138 139/* 140 * ISO/IEC 9899:1999 141 * 7.18.2.3 Limits of fastest minimum-width integer types 142 */ 143/* Minimum values of fastest minimum-width signed integer types. */ 144#define INT_FAST8_MIN INT_MIN 145#define INT_FAST16_MIN INT_MIN 146#define INT_FAST32_MIN INT_MIN 147#define INT_FAST64_MIN LONG_MIN 148 149/* Maximum values of fastest minimum-width signed integer types. */ 150#define INT_FAST8_MAX INT_MAX 151#define INT_FAST16_MAX INT_MAX 152#define INT_FAST32_MAX INT_MAX 153#define INT_FAST64_MAX LONG_MAX 154 155/* Maximum values of fastest minimum-width unsigned integer types. */ 156#define UINT_FAST8_MAX UINT_MAX 157#define UINT_FAST16_MAX UINT_MAX 158#define UINT_FAST32_MAX UINT_MAX 159#define UINT_FAST64_MAX ULONG_MAX 160 161/* 162 * ISO/IEC 9899:1999 163 * 7.18.2.4 Limits of integer types capable of holding object pointers 164 */ 165#define INTPTR_MIN LONG_MIN 166#define INTPTR_MAX LONG_MAX 167#define UINTPTR_MAX ULONG_MAX 168 169/* 170 * ISO/IEC 9899:1999 171 * 7.18.2.5 Limits of greatest-width integer types 172 */ 173#define INTMAX_MIN LONG_MIN 174#define INTMAX_MAX LONG_MAX 175#define UINTMAX_MAX ULONG_MAX 176 177/* 178 * ISO/IEC 9899:1999 179 * 7.18.3 Limits of other integer types 180 */ 181/* Limits of ptrdiff_t. */ 182#define PTRDIFF_MIN LONG_MIN 183#define PTRDIFF_MAX LONG_MAX 184 185/* Limits of sig_atomic_t. */ 186#define SIG_ATOMIC_MIN INT_MIN 187#define SIG_ATOMIC_MAX INT_MAX 188 189/* Limit of size_t. */ 190#define SIZE_MAX ULONG_MAX 191 192#ifndef WCHAR_MIN /* Also possibly defined in <wchar.h> */ 193/* Limits of wchar_t. */ 194#define WCHAR_MIN INT_MIN 195#define WCHAR_MAX INT_MAX 196 197/* Limits of wint_t. */ 198#define WINT_MIN INT_MIN 199#define WINT_MAX INT_MAX 200#endif 201#endif /* !defined(__cplusplus) || defined(__STDC_LIMIT_MACROS) */ 202#endif /* !_POSIX_SOURCE && !_XOPEN_SOURCE */ 203#endif /* !_ANSI_SOURCE */ 204 205#if (!defined(_ANSI_SOURCE)&&!defined(_POSIX_SOURCE)) || defined(_XOPEN_SOURCE) 206#define LONG_BIT 64 207#define WORD_BIT 32 208 209#define DBL_DIG 15 210#define DBL_MAX 1.7976931348623157E+308 211#define DBL_MIN 2.2250738585072014E-308 212 213#define FLT_DIG 6 214#define FLT_MAX 3.40282347E+38F 215#define FLT_MIN 1.17549435E-38F 216#endif 217 218#endif /* !_MACHINE_LIMITS_H_ */ 219