//
  // 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