www.pudn.com > shine.zip > ieeefloat.h

//    Shine is an MP3 encoder 
//    Copyright (C) 1999-2000  Gabriel Bouvigne 
// 
//    This library is free software; you can redistribute it and/or 
//    modify it under the terms of the GNU Library General Public 
//    License as published by the Free Software Foundation; either 
//    version 2 of the License, or (at your option) any later version. 
// 
//    This library is distributed in the hope that it will be useful, 
//    but WITHOUT ANY WARRANTY; without even the implied warranty of 
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU 
//    Library General Public License for more details. 
 
 
#ifndef IEEE_FLOAT_H__ 
#define IEEE_FLOAT_H__ 
/* Copyright (C) 1988-1991 Apple Computer, Inc. 
 * All Rights Reserved. 
 * 
 * Warranty Information 
 * Even though Apple has reviewed this software, Apple makes no warranty 
 * or representation, either express or implied, with respect to this 
 * software, its quality, accuracy, merchantability, or fitness for a  
 * particular purpose.  As a result, this software is provided "as is," 
 * and you, its user, are assuming the entire risk as to its quality 
 * and accuracy. 
 * 
 * This code may be used and freely distributed as long as it includes 
 * this copyright notice and the warranty information. 
 * 
 * Machine-independent I/O routines for IEEE floating-point numbers. 
 * 
 * NaN's and infinities are converted to HUGE_VAL or HUGE, which 
 * happens to be infinity on IEEE machines.  Unfortunately, it is 
 * impossible to preserve NaN's in a machine-independent way. 
 * Infinities are, however, preserved on IEEE machines. 
 * 
 * These routines have been tested on the following machines: 
 *	Apple Macintosh, MPW 3.1 C compiler 
 *	Apple Macintosh, THINK C compiler 
 *	Silicon Graphics IRIS, MIPS compiler 
 *	Cray X/MP and Y/MP 
 *	Digital Equipment VAX 
 *	Sequent Balance (Multiprocesor 386) 
 *	NeXT 
 * 
 * 
 * Implemented by Malcolm Slaney and Ken Turkowski. 
 * 
 * Malcolm Slaney contributions during 1988-1990 include big- and little- 
 * endian file I/O, conversion to and from Motorola's extended 80-bit 
 * floating-point format, and conversions to and from IEEE single- 
 * precision floating-point format. 
 * 
 * In 1991, Ken Turkowski implemented the conversions to and from 
 * IEEE double-precision format, added more precision to the extended 
 * conversions, and accommodated conversions involving +/- infinity, 
 * NaN's, and denormalized numbers. 
 * 
 * $Id: ieeefloat.h,v 1.1 1993/06/11 17:45:46 malcolm Exp $ 
 * 
 * $Log: ieeefloat.h,v $ 
 * Revision 1.1  1993/06/11  17:45:46  malcolm 
 * Initial revision 
 * 
 */ 
 
#include	 
 
typedef float Single; 
 
#ifndef applec 
 typedef double defdouble; 
#else /* !applec */ 
 typedef long double defdouble; 
#endif /* applec */ 
 
#ifndef THINK_C 
 typedef double Double; 
#else /* THINK_C */ 
 typedef short double Double; 
#endif /* THINK_C */ 
 
#define	kFloatLength	4 
#define	kDoubleLength	8 
#define	kExtendedLength	10 
 
extern defdouble ConvertFromIeeeSingle(char *bytes); 
extern void ConvertToIeeeSingle(defdouble num, char *bytes); 
extern defdouble ConvertFromIeeeDouble(char *bytes); 
extern void ConvertToIeeeDouble(defdouble num, char *bytes); 
extern defdouble ConvertFromIeeeExtended(char *bytes); 
extern void ConvertToIeeeExtended(defdouble num, char *bytes); 
#endif