fpenvironment_win32.h

This software aims to create an applet and panel tools to manage a wireless interface card, such as

//
// FPEnvironment_WIN32.h
//
// $Id: //poco/Main/Foundation/include/Foundation/FPEnvironment_WIN32.h#5 $
//
// Definitions of class FPEnvironmentImp for WIN32.
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//


#ifndef Foundation_FPEnvironment_WIN32_INCLUDED
#define Foundation_FPEnvironment_WIN32_INCLUDED


#ifndef Foundation_Foundation_INCLUDED
#include "Foundation/Foundation.h"
#endif
#ifndef STD_FLOAT_INCLUDED
#include <float.h>
#define STD_FLOAT_INCLUDED
#endif
#ifndef STD_MATH_INCLUDED
#include <math.h>
#define STD_MATH_INCLUDED
#endif


Foundation_BEGIN


class Foundation_API FPEnvironmentImp
{
protected:
	enum RoundingModeImp
	{
		FP_ROUND_DOWNWARD_IMP   = RC_DOWN,
		FP_ROUND_UPWARD_IMP     = RC_UP,
		FP_ROUND_TONEAREST_IMP  = RC_NEAR,
		FP_ROUND_TOWARDZERO_IMP = RC_CHOP
	};
	enum FlagImp
	{
		FP_DIVIDE_BY_ZERO_IMP = SW_ZERODIVIDE,
		FP_INEXACT_IMP        = SW_INEXACT,
		FP_OVERFLOW_IMP       = SW_OVERFLOW,
		FP_UNDERFLOW_IMP      = SW_UNDERFLOW,
		FP_INVALID_IMP        = SW_INVALID
	};
	FPEnvironmentImp();
	FPEnvironmentImp(const FPEnvironmentImp& env);
	~FPEnvironmentImp();
	FPEnvironmentImp& operator = (const FPEnvironmentImp& env);
	void keepCurrentImp();		
	static void clearFlagsImp();
	static bool isFlagImp(FlagImp flag);	
	static void setRoundingModeImp(RoundingModeImp mode);
	static RoundingModeImp getRoundingModeImp();
	static bool isInfiniteImp(float value);		
	static bool isInfiniteImp(double value);
	static bool isInfiniteImp(long double value);
	static bool isNaNImp(float value);		
	static bool isNaNImp(double value);
	static bool isNaNImp(long double value);
	static float copySignImp(float target, float source);		
	static double copySignImp(double target, double source);
	static long double copySignImp(long double target, long double source);

private:
	unsigned _env;
};


//
// inlines
//
inline bool FPEnvironmentImp::isInfiniteImp(float value)
{
	return _finite(value) == 0;
}


inline bool FPEnvironmentImp::isInfiniteImp(double value)
{
	return _finite(value) == 0;
}


inline bool FPEnvironmentImp::isInfiniteImp(long double value)
{
	return _finite(value) == 0;
}


inline bool FPEnvironmentImp::isNaNImp(float value)
{
	return _isnan(value) != 0;
}


inline bool FPEnvironmentImp::isNaNImp(double value)
{
	return _isnan(value) != 0;
}


inline bool FPEnvironmentImp::isNaNImp(long double value)
{
	return _isnan(value) != 0;
}


inline float FPEnvironmentImp::copySignImp(float target, float source)
{
	return float(_copysign(target, source));
}


inline double FPEnvironmentImp::copySignImp(double target, double source)
{
	return _copysign(target, source);
}


inline long double FPEnvironmentImp::copySignImp(long double target, long double source)
{
	return (source > 0 && target > 0) || (source < 0 && target < 0) ? target : -target;
}


Foundation_END


#endif // Foundation_FPEnvironment_WIN32_INCLUDED