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9e32991a6d
number rather than a decimal one. Now how odd is that? - strtod() and strtof() now support "inf"/"infinity"/"nan"/"nan(..)" and hexadecimal floating point numbers, for C99. - Added the fpclassify(), isfinite(), isnormal() and signbit() macros for C99. - Reimplemented isnan() and isinf() as macros for C99. The corresponding functions will be dropped from the library. Note that the isinf() macro does not return -1, 0 or 1 like the old function did, but only 0 or 1 depending upon whether the parameter represents +/- infinity or not. - Added fabsf() for C99. git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@14935 87f5fb63-7c3d-0410-a384-fd976d0f7a62
64 lines
2.3 KiB
C
64 lines
2.3 KiB
C
/*
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* $Id: math_nan.c,v 1.1 2005-05-08 08:51:29 obarthel Exp $
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*
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* :ts=4
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*
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* Portable ISO 'C' (1994) runtime library for the Amiga computer
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* Copyright (c) 2002-2005 by Olaf Barthel <olsen@sourcery.han.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Neither the name of Olaf Barthel nor the names of contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _STDIO_HEADERS_H
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#include "stdio_headers.h"
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#endif /* _STDIO_HEADERS_H */
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/****************************************************************************/
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#if defined (FLOATING_POINT_SUPPORT)
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/****************************************************************************/
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/* The following is not part of the ISO 'C' (1994) standard, but it should
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be part of ISO/IEC 9899:1999, also known as "C99". */
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/****************************************************************************/
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double
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nan(const char * UNUSED tagp)
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{
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union ieee_double x;
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/* Exponent = 2047 and fraction != 0.0 */
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x.raw[0] = 0x7ff00000;
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x.raw[1] = 0x00000001;
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return(x.value);
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}
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/****************************************************************************/
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#endif /* FLOATING_POINT_SUPPORT */
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