kev/Drawer/SSBase/DataIO/DrawCommon/WDouble.h

/**
*	@file		WDouble.h
*	@brief		double<EFBFBD>ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>װ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>þ<EFBFBD><EFBFBD><EFBFBD>
*	@author		ɳĮ<EFBFBD><EFBFBD>ѻ
*	@date		2009-09-07
*	@warning	WDouble<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>Ҫʵ<EFBFBD>ֵĹ<EFBFBD><EFBFBD><EFBFBD>
*				1) <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȫ<EFBFBD>ֵ<EFBFBD>Ĭ<EFBFBD>Ͼ<EFBFBD><EFBFBD>Ⱥ͵<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ľ<EFBFBD><EFBFBD><EFBFBD>
*				2) <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭʼdoubleֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>þ<EFBFBD><EFBFBD>ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ
*				3) ͬʱ֧<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD>ʽ<EFBFBD><EFBFBD>
*				3) <EFBFBD><EFBFBD>С<EFBFBD>ȽϷ<EFBFBD><<EFBFBD><EFBFBD>><EFBFBD><EFBFBD><=<EFBFBD><EFBFBD>>=
*				4) ==<EFBFBD><EFBFBD>!=<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
*				5) +<EFBFBD><EFBFBD>-<EFBFBD><EFBFBD>*<EFBFBD><EFBFBD>/<EFBFBD><EFBFBD>+=<EFBFBD><EFBFBD>-=<EFBFBD><EFBFBD>*=<EFBFBD><EFBFBD>/=<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
*				6) <<<EFBFBD><EFBFBD>>><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
*/

#pragma once
#include <iostream>
using std::ostream;
using std::istream;

namespace wuya
{

class AFX_EXT_CLASS WDouble
{
public:
	WDouble(void);
	WDouble(double dVal,size_t nPrecision = GetPrecisionDef());
	WDouble(const WDouble& dVal);
	~WDouble(void) throw();

	WDouble& operator = (const WDouble& dVal);
	WDouble& operator = (double dVal);

	// operator
	friend inline bool operator == (const WDouble& dVal1,const WDouble& dVal2);
	friend inline bool operator != (const WDouble& dVal1,const WDouble& dVal2);
	friend inline bool operator < (const WDouble& dVal1,const WDouble& dVal2);
	friend inline bool operator > (const WDouble& dVal1,const WDouble& dVal2);
	friend inline bool operator <= (const WDouble& dVal1,const WDouble& dVal2);
	friend inline bool operator >= (const WDouble& dVal1,const WDouble& dVal2);
	friend inline void operator += (WDouble& dVal1,const WDouble& dVal2);			///< <20><><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ׼
	friend inline void operator -= (WDouble& dVal1,const WDouble& dVal2);
	friend inline void operator *= (WDouble& dVal1,const WDouble& dVal2);
	friend inline void operator /= (WDouble& dVal1,const WDouble& dVal2);
	friend inline WDouble operator + (const WDouble& dVal1,const WDouble& dVal2);	///< <20><><EFBFBD><EFBFBD><EFBFBD>Ծ<EFBFBD><D4BE>Ƚϴ<C8BD><CFB4><EFBFBD>Ϊ׼
	friend inline WDouble operator - (const WDouble& dVal1,const WDouble& dVal2);
	friend inline WDouble operator * (const WDouble& dVal1,const WDouble& dVal2);
	friend inline WDouble operator / (const WDouble& dVal1,const WDouble& dVal2);
	friend inline ostream& operator << (ostream& os,const WDouble& object);
	friend inline istream& operator >> (istream& is,WDouble& object);

	/**
	*	@brief	<EFBFBD><EFBFBD><EFBFBD><EFBFBD>WDouble<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	*	@param	[in]nPrecision <EFBFBD><EFBFBD><EFBFBD><EFBFBD>double<EFBFBD>;<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֧<EFBFBD><EFBFBD>10λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD>ΧΪ0-10<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǹ÷<EFBFBD>Χֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	*/
	void	SetPrecision(size_t nPrecision);
	/** @brief	<09><><EFBFBD><EFBFBD>WDoule<6C><65><EFBFBD><EFBFBD> */
	size_t	GetPrecision() const;

	/**
	*	@brief	<EFBFBD><EFBFBD><EFBFBD><EFBFBD>doubleֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ΪWDouble<EFBFBD><EFBFBD><EFBFBD>澫<EFBFBD><EFBFBD>
	*/
	double	Get() const;
	/**
	*	@brief	<EFBFBD><EFBFBD><EFBFBD><EFBFBD>doubleֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ΪnPrecision
	*/
	double	Get(size_t nPrecision) const;
	/**
	*	@brief	<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>doubleֵ<EFBFBD><EFBFBD>δ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	*/
	double	GetEnter() const;

	static	void	SetPrecisionDef(size_t nPrecision);
	static	size_t	GetPrecisionDef();

private:
	/** @brief	<09><>ԭʼ<D4AD><CABC><EFBFBD>ݽ<EFBFBD><DDBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
	double	Round(size_t nPrecision) const;

	void	Round();

private:
	double	m_dDbl;				///< <20><><EFBFBD>վ<EFBFBD><D5BE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>doubleֵ
	double	m_dDblEnter;		///< ԭʼdoubleֵ
	size_t	m_nPrecision;		///< double<6C><65><EFBFBD><EFBFBD>

	static	size_t	m_nPrecisionDef;	///< Ĭ<>Ͼ<EFBFBD><CFBE>ȡ<EFBFBD>ֵΪ1<CEAA><31><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ծ<EFBFBD>ȷ<EFBFBD><C8B7>0.1
};

//operator
inline bool operator == (const WDouble& dVal1,const WDouble& dVal2)
{
	return dVal1.m_dDbl == dVal2.m_dDbl;
}
inline bool operator != (const WDouble& dVal1,const WDouble& dVal2)
{
	return dVal1.m_dDbl != dVal2.m_dDbl;
}
inline bool operator < (const WDouble& dVal1,const WDouble& dVal2)
{
	return dVal1.m_dDbl < dVal2.m_dDbl;
}
inline bool operator > (const WDouble& dVal1,const WDouble& dVal2)
{
	return dVal1.m_dDbl > dVal2.m_dDbl;
}
inline bool operator <= (const WDouble& dVal1,const WDouble& dVal2)
{
	return dVal1.m_dDbl <= dVal2.m_dDbl;
}
inline bool operator >= (const WDouble& dVal1,const WDouble& dVal2)
{
	return dVal1.m_dDbl >= dVal2.m_dDbl;
}
inline void operator += (WDouble& dVal1,const WDouble& dVal2)
{
	dVal1.m_dDblEnter += dVal2.m_dDblEnter;

	// <20><>dVal1<6C>ľ<EFBFBD><C4BE><EFBFBD>Ϊ׼
	dVal1.Round();
}
inline void operator -= (WDouble& dVal1,const WDouble& dVal2)
{
	dVal1.m_dDblEnter -= dVal2.m_dDblEnter;

	// <20><>dVal1<6C>ľ<EFBFBD><C4BE><EFBFBD>Ϊ׼
	dVal1.Round();
}
inline void operator *= (WDouble& dVal1,const WDouble& dVal2)
{
	dVal1.m_dDblEnter *= dVal2.m_dDblEnter;

	// <20><>dVal1<6C>ľ<EFBFBD><C4BE><EFBFBD>Ϊ׼
	dVal1.Round();
}
inline void operator /= (WDouble& dVal1,const WDouble& dVal2)
{
	dVal1.m_dDblEnter /= dVal2.m_dDblEnter;

	// <20><>dVal1<6C>ľ<EFBFBD><C4BE><EFBFBD>Ϊ׼
	dVal1.Round();
	dVal1.m_dDblEnter = dVal1.m_dDbl;
}
inline WDouble operator + (const WDouble& dVal1,const WDouble& dVal2)
{	
	size_t nPrecision;
	if(dVal1.m_nPrecision > dVal2.m_nPrecision)
		nPrecision = dVal1.m_nPrecision;
	else
		nPrecision = dVal2.m_nPrecision;

	WDouble dVal(dVal1.m_dDbl + dVal2.m_dDbl,nPrecision);
	return dVal;
}
inline WDouble operator - (const WDouble& dVal1,const WDouble& dVal2)
{	
	size_t nPrecision;
	if(dVal1.m_nPrecision > dVal2.m_nPrecision)
		nPrecision = dVal1.m_nPrecision;
	else
		nPrecision = dVal2.m_nPrecision;

	WDouble dVal(dVal1.m_dDbl - dVal2.m_dDbl,nPrecision);
	return dVal;
}
inline WDouble operator * (const WDouble& dVal1,const WDouble& dVal2)
{	
	size_t nPrecision;
	if(dVal1.m_nPrecision > dVal2.m_nPrecision)
		nPrecision = dVal1.m_nPrecision;
	else
		nPrecision = dVal2.m_nPrecision;

	WDouble dVal(dVal1.m_dDbl * dVal2.m_dDbl,nPrecision);
	return dVal;
}
inline WDouble operator / (const WDouble& dVal1,const WDouble& dVal2)
{	
	size_t nPrecision;
	if(dVal1.m_nPrecision > dVal2.m_nPrecision)
		nPrecision = dVal1.m_nPrecision;
	else
		nPrecision = dVal2.m_nPrecision;

	WDouble dVal(dVal1.m_dDbl / dVal2.m_dDbl,nPrecision);
	return dVal;
}
inline ostream& operator << (ostream& os,const WDouble& object)
{
	os << object.m_dDbl;

	return os;
}
inline istream& operator >> (istream& is,WDouble& object)
{
	double dVal;
	is >> dVal;

	if(is)
	{
		object.m_dDblEnter = dVal;
		object.Round();
	}
	else
		object = WDouble();

	return is;
}

};