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//

// FPEnvironment_WIN32.h

//

// $Id: //poco/1.3/Foundation/include/Poco/FPEnvironment_WIN32.h#1 $

//

// Library: Foundation

// Package: Core

// Module:  FPEnvironment

//

// Definitions of class FPEnvironmentImpl for WIN32.

//

// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.

// and Contributors.

//

// Permission is hereby granted, free of charge, to any person or organization

// obtaining a copy of the software and accompanying documentation covered by

// this license (the "Software") to use, reproduce, display, distribute,

// execute, and transmit the Software, and to prepare derivative works of the

// Software, and to permit third-parties to whom the Software is furnished to

// do so, all subject to the following:

//

// The copyright notices in the Software and this entire statement, including

// the above license grant, this restriction and the following disclaimer,

// must be included in all copies of the Software, in whole or in part, and

// all derivative works of the Software, unless such copies or derivative

// works are solely in the form of machine-executable object code generated by

// a source language processor.

//

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT

// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE

// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,

// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

// DEALINGS IN THE SOFTWARE.

//

#ifndef Foundation_FPEnvironment_WIN32_INCLUDED

#define Foundation_FPEnvironment_WIN32_INCLUDED

#include "Poco/Foundation.h"

#include <float.h>

#include <math.h>

namespace Poco {

class Foundation_API FPEnvironmentImpl

{

protected:

        enum RoundingModeImpl

        {

                FP_ROUND_DOWNWARD_IMPL   = RC_DOWN,

                FP_ROUND_UPWARD_IMPL     = RC_UP,

                FP_ROUND_TONEAREST_IMPL  = RC_NEAR,

                FP_ROUND_TOWARDZERO_IMPL = RC_CHOP

        };

        enum FlagImpl

        {

                FP_DIVIDE_BY_ZERO_IMPL = SW_ZERODIVIDE,

                FP_INEXACT_IMPL        = SW_INEXACT,

                FP_OVERFLOW_IMPL       = SW_OVERFLOW,

                FP_UNDERFLOW_IMPL      = SW_UNDERFLOW,

                FP_INVALID_IMPL        = SW_INVALID

        };

        FPEnvironmentImpl();

        FPEnvironmentImpl(const FPEnvironmentImpl& env);

        ~FPEnvironmentImpl();

        FPEnvironmentImpl& operator = (const FPEnvironmentImpl& env);

        void keepCurrentImpl();

        static void clearFlagsImpl();

        static bool isFlagImpl(FlagImpl flag);

        static void setRoundingModeImpl(RoundingModeImpl mode);

        static RoundingModeImpl getRoundingModeImpl();

        static bool isInfiniteImpl(float value);

        static bool isInfiniteImpl(double value);

        static bool isInfiniteImpl(long double value);

        static bool isNaNImpl(float value);

        static bool isNaNImpl(double value);

        static bool isNaNImpl(long double value);

        static float copySignImpl(float target, float source);

        static double copySignImpl(double target, double source);

        static long double copySignImpl(long double target, long double source);

private:

        unsigned _env;

};

//

// inlines

//

inline bool FPEnvironmentImpl::isInfiniteImpl(float value)

{

        return _finite(value) == 0;

}

inline bool FPEnvironmentImpl::isInfiniteImpl(double value)

{

        return _finite(value) == 0;

}

inline bool FPEnvironmentImpl::isInfiniteImpl(long double value)

{

        return _finite(value) == 0;

}

inline bool FPEnvironmentImpl::isNaNImpl(float value)

{

        return _isnan(value) != 0;

}

inline bool FPEnvironmentImpl::isNaNImpl(double value)

{

        return _isnan(value) != 0;

}

inline bool FPEnvironmentImpl::isNaNImpl(long double value)

{

        return _isnan(value) != 0;

}

inline float FPEnvironmentImpl::copySignImpl(float target, float source)

{

        return float(_copysign(target, source));

}

inline double FPEnvironmentImpl::copySignImpl(double target, double source)

{

        return _copysign(target, source);

}

inline long double FPEnvironmentImpl::copySignImpl(long double target, long double source)

{

        return (source > 0 && target > 0) || (source < 0 && target < 0) ? target : -target;

}

} // namespace Poco

#endif // Foundation_FPEnvironment_WIN32_INCLUDED