www.pudn.com > CRC32.rar > MemberFxn.h

 
/* 
	Copyright 2006 - 2008, All Rights Reserved. 
							 
	这个类用来描述一个C++类成员函数地址 
 
	作者	- 张鲁夺(zhangluduo) 
	MSN		- zhangluduo@msn.com 
	QQ群	- 34064264 
 
	为所有爱我的人和我爱的人努力! 
*/ 
 
#ifndef _MEMBERFXN_H 
#define _MEMBERFXN_H 
 
#ifndef _UNION_CAST 
#define _UNION_CAST 
	template  
	ToType union_cast (FromType f) 
	{ 
		union  
		{ 
			FromType _f; 
			ToType   _t; 
		}	ut; 
		ut._f = f; 
		return ut._t; 
	} 
#endif 
 
class MemberFxn  
{ 
private: 
 
	void*			m_This;				// the this pointer of class 
	unsigned long	m_MemberFxnAddr;	// member function address of class 
 
public: 
// construction 
 
	MemberFxn( ); 
	MemberFxn( int n /* n must be zero */ ); 
	 
	template  
	MemberFxn( void* This, T MemberFxnName ) 
	{ 
		SetAddr( This, MemberFxnName ); 
	} 
 
// destruction 
 
	~MemberFxn( ); 
 
// over load operator 
 
	MemberFxn&		operator =	( MemberFxn addr ); 
	bool			operator == ( MemberFxn addr ) ; 
 
	bool			IsNull	( ); 
	void*			GetThis	( ); 
	unsigned long	GetAddr	( ); 
 
	/** set member function of a class, or a global function 
		void* This		- a pointer of a object, if you will specify a global 
						function, you must set this parameter zero 
		T MemberFxnName	- member function name of a class,  
						for example 
						&Class::MemberFunctionName or &GlobalFunctionName 
	*/ 
	template  
	void SetAddr( void* This, T MemberFxnName ) 
	{ 
		m_This			= This; 
		m_MemberFxnAddr	= union_cast( MemberFxnName ); 
	} 
}; 
 
#endif