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539cc3553d
islessequal() and islessgreater() to <math.h> for C99. - The wchar_t type is now an 'unsigned short' integer (16 bits wide). - Added PTRDIFF_MIN/PTRDIFF_MAX, WCHAR_MIN/WCHAR_MAX and WINT_MIN/WINT_MAX to <stdint.h> for C99. - Added imaxdiv() and imaxabs() for C99. - Added strtoimax() and strtoumax() for C99. - Added nextafter() and nextafterf() for C99. - Added copysign() and copysignf() for C99. - Unless I missed something, clib2 should now be functionally complete with regard to C99, except for the floating point operations covered. These are a major challenge all by themselves, and I wonder both whether they are worth the effort and how one could implement them correctly. - fflush() now consistently supports a NULL parameter, causing all streams to be flushed for which this behaviour is defined. git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@14943 87f5fb63-7c3d-0410-a384-fd976d0f7a62
118 lines
3.7 KiB
C
118 lines
3.7 KiB
C
/*
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* $Id: math_isunordered.c,v 1.1 2005-05-12 13:21:43 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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int
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__isunordered_float(float number_x,float number_y)
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{
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union ieee_single x;
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union ieee_single y;
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int result;
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x.value = number_x;
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y.value = number_y;
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/* Exponent = 255 and fraction != 0.0 -> not a number */
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if((x.raw[0] & 0x7f800000) == 0x7f800000 && (x.raw[0] & 0x007fffff) != 0)
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result = 1;
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else if((y.raw[0] & 0x7f800000) == 0x7f800000 && (y.raw[0] & 0x007fffff) != 0)
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result = 1;
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else
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result = 0;
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return(result);
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}
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/****************************************************************************/
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int
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__isunordered_float_double(float number_x,double number_y)
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{
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union ieee_single x;
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union ieee_double y;
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int result;
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x.value = number_x;
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y.value = number_y;
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if((x.raw[0] & 0x7f800000) == 0x7f800000 && (x.raw[0] & 0x007fffff) != 0)
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result = 1; /* Exponent = 255 and fraction != 0.0 -> not a number */
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else if (((y.raw[0] & 0x7ff00000) == 0x7ff00000) && ((y.raw[0] & 0x000fffff) != 0 || (y.raw[1] != 0)))
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result = 1; /* Exponent = 2047 and fraction != 0.0 -> not a number */
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else
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result = 0;
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return(result);
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}
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/****************************************************************************/
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int
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__isunordered_double(double number_x,double number_y)
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{
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union ieee_double x;
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union ieee_double y;
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int result;
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x.value = number_x;
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y.value = number_y;
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/* Exponent = 2047 and fraction != 0.0 -> not a number */
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if(((x.raw[0] & 0x7ff00000) == 0x7ff00000) && ((x.raw[0] & 0x000fffff) != 0 || (x.raw[1] != 0)))
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result = 1;
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else if (((y.raw[0] & 0x7ff00000) == 0x7ff00000) && ((y.raw[0] & 0x000fffff) != 0 || (y.raw[1] != 0)))
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result = 1;
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else
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result = 0;
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return(result);
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}
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/****************************************************************************/
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#endif /* FLOATING_POINT_SUPPORT */
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