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//--------------------------------------------------------------------------
//
// File: nan.h
//
// Created: 18/10/2001
//
// Author: Pavel Sakov
// CSIRO Marine Research
//
// Purpose: NaN definition
//
// Description: Should cover machines with 64 bit doubles or other machines
// with GCC
//
// Revisions: None
//
//--------------------------------------------------------------------------
#if !defined ( _NAN_H )
#define _NAN_H
#if ( defined ( __GNUC__ ) && !defined ( __ICC ) ) || defined ( __BORLANDC__ )
static const double NaN = 0.0 / 0.0;
#ifdef __BORLANDC__
#define isnan _isnan
#define copysign _copysign
#endif
#elif defined ( _WIN32 )
#if !defined ( _MSC_VER )
static unsigned _int64 lNaN = ( (unsigned _int64) 1 << 63 ) - 1;
#define NaN ( *(double *) &lNaN )
#else
// MSVC/C++ 6.0 reports a version 1200,
// MSVC/C++ 2003 reports a version 1300
//
#include <float.h>
#include <ymath.h>
#undef NaN
#if _MSC_VER < 1300
#define NaN _Nan._D
#else
#define NaN _Nan._Double
#endif
#define isnan _isnan
#define copysign _copysign
#endif
#else
static const long long lNaN = ( (unsigned long long) 1 << 63 ) - 1;
#define NaN ( *(double *) &lNaN )
#endif
#endif
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