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/* 
	Stack 
 
	Date: 
		2001/02/05  
*/ 
#ifndef __ORZ_DATASTRUCTURE_STACK__ 
#define __ORZ_DATASTRUCTURE_STACK__ 
 
 
#include "list.h" 
 
 
template< class T > 
class CStack : public CList< T > 
{ 
public: 
	virtual bool Push( T *pData ); 
	virtual bool PushHead( T *pData ); 
	virtual T *  Pop(); 
}; 
 
 
template< class T > 
bool CStack< T >::Push( T * pData ) 
{ 
	return CList< T >::Insert( pData ); 
} 
 
 
template< class T > 
bool CStack< T >::PushHead( T * pData ) 
{ 
	return CList< T >::InsertHead( pData ); 
} 
 
 
template< class T > 
T * CStack< T >::Pop() 
{ 
	if ( IsEmpty() ) 
		return NULL; 
 
	return RemoveNode( m_pTail ); 
} 
 
 
#endif