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by Joachim Erfle
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//--------------------------------------------------------------------------
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//
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// File: nan.h
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//
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// Created: 18/10/2001
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//
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// Author: Pavel Sakov
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// CSIRO Marine Research
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//
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// Purpose: NaN definition
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//
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// Description: Should cover machines with 64 bit doubles or other machines
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// with GCC
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//
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// Revisions: None
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//
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//--------------------------------------------------------------------------
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#if !defined ( _NAN_H )
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#define _NAN_H
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#if ( defined ( __GNUC__ ) && !defined ( __ICC ) ) || defined ( __BORLANDC__ )
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static const double NaN = 0.0 / 0.0; |
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#ifdef __BORLANDC__
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#define isnan _isnan
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#define copysign _copysign
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#endif
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#elif defined ( WIN32 )
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#if !defined ( _MSC_VER )
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static unsigned _int64 lNaN = ( (unsigned _int64) 1 << 63 ) - 1; |
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#define NaN ( *(double *) &lNaN )
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#else
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// MSVC/C++ 6.0 reports a version 1200,
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// MSVC/C++ 2003 reports a version 1300
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//
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#include <float.h> |
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#include <ymath.h> |
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#undef NaN
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#if _MSC_VER < 1300
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#define NaN _Nan._D
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#else
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#define NaN _Nan._Double
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#endif
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#define isnan _isnan
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#define copysign _copysign
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#endif
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#else
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static const long long lNaN = ( (unsigned long long) 1 << 63 ) - 1; |
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#define NaN ( *(double *) &lNaN )
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#endif
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#endif
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//#if !defined(_NAN_H)
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// #define _NAN_H
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//
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// #if defined(__GNUC__)
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// static const double NaN = 0.0 / 0.0;
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// #elif defined(BIG_ENDIAN) || defined(_BIG_ENDIAN)
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// static const long long lNaN = 0x7fffffffffffffff;
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//
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// #define NaN (*(double*)&lNaN)
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// #else
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// static const long long lNaN = 0xfff8000000000000;
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//
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// #define NaN (*(double*)&lNaN)
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// #endif
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//
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// #endif
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