float.h
来自「基于组件方式开发操作系统的OSKIT源代码」· C头文件 代码 · 共 72 行
H
72 行
/* * Copyright (c) 1989 Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from: @(#)float.h 7.1 (Berkeley) 5/8/90 */#ifndef _MACHINE_FLOAT_H_#define _MACHINE_FLOAT_H_ 1#define FLT_RADIX 2 /* b */#define FLT_ROUNDS 1 /* FP addition rounds to nearest */#define FLT_MANT_DIG 24 /* p */#define FLT_EPSILON 1.19209290E-07F /* b**(1-p) */#define FLT_DIG 6 /* floor((p-1)*log10(b))+(b == 10) */#define FLT_MIN_EXP (-125) /* emin */#define FLT_MIN 1.17549435E-38F /* b**(emin-1) */#define FLT_MIN_10_EXP (-37) /* ceil(log10(b**(emin-1))) */#define FLT_MAX_EXP 128 /* emax */#define FLT_MAX 3.40282347E+38F /* (1-b**(-p))*b**emax */#define FLT_MAX_10_EXP 38 /* floor(log10((1-b**(-p))*b**emax)) */#define DBL_MANT_DIG 53#define DBL_EPSILON 2.2204460492503131E-16#define DBL_DIG 15#define DBL_MIN_EXP (-1021)#define DBL_MIN 2.2250738585072014E-308#define DBL_MIN_10_EXP (-307)#define DBL_MAX_EXP 1024#define DBL_MAX 1.7976931348623157E+308#define DBL_MAX_10_EXP 308#define LDBL_MANT_DIG DBL_MANT_DIG#define LDBL_EPSILON DBL_EPSILON#define LDBL_DIG DBL_DIG#define LDBL_MIN_EXP DBL_MIN_EXP#define LDBL_MIN DBL_MIN#define LDBL_MIN_10_EXP DBL_MIN_10_EXP#define LDBL_MAX_EXP DBL_MAX_EXP#define LDBL_MAX DBL_MAX#define LDBL_MAX_10_EXP DBL_MAX_10_EXP#endif /* _MACHINE_FLOAT_H_ */
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