//-------------------------------------------------------------------------------------------------------+
// Copyright (C), 1998-2007, SH Software Co. Ltd.
// = FileName	:   SqStack 模板类
// = Version	:   ver2.0
// = Author		:   zjq
// = CreateDate	:   2002-09-09
// = Description:   SqStack 声明 基于动态数组的堆栈
// = Maintainers: 
//                  
//-------------------------------------------------------------------------------------------------------+
#ifndef _SQSTACK_H_
#define _SQSTACK_H_

#ifndef _STACK_H_
#include "Stack.h"
#endif

#ifndef _SQTABLE_H_
#include "SqTable.h"
#endif

template<class T> class SqStack: public Stack<T>
{
public:
 
	SqStack(long autoAllocUnit = 100,long depth = -1);
	
	virtual ~SqStack();

	virtual void Clear();
	
	virtual void GoBack();
	
	virtual void GoAhead();
	
	virtual bool Pop(T&t);
	
	virtual bool Push(T const&t);

	virtual bool GetTopData(T&t);
	
	virtual long GetDepth();
	
	virtual T& operator[](long i);

protected:

	SqTable<T> table;
};

template<class T>
SqStack<T>::~SqStack()
{

}

template<class T>
virtual T&  SqStack<T>::operator[](long i)
{
	return table[i];
}

template<class T>
SqStack<T>::SqStack(long autoAllocUnit,long depth)
:Stack<T>(depth),table(autoAllocUnit,autoAllocUnit)
{
}

template<class T>
bool SqStack<T>::Push(T const&t)
{
	if(this->IsDepthLimited() && GetDepth() >= this->maxDepth)
	{
		return false;
	}
	table[table.GetCur()+1] = t;
	this->oldDepth = GetDepth();
	return true;
}

template<class T>
bool SqStack<T>::Pop(T&t)
{
	if(this->IsEmpty())
	{
		return false;
	}

	t = table.GetCurData();
	table.MoveToPre();
	return true;
}

template<class T>
bool SqStack<T>::GetTopData(T&t)
{
	if(this->IsEmpty())
	{
		return false;
	}
	t = table.GetCurData();
	return true;
}

template<class T>
void SqStack<T>::Clear()
{
	table.Clear();
	this->oldDepth = 0;
}

template<class T>
long SqStack<T>::GetDepth()
{
	return table.GetCur()+1;
}

template<class T>
void SqStack<T>::GoBack()
{
	if(this->CanGoBack())
	{
		table.MoveToPre();
	}
}

template<class T>
void SqStack<T>::GoAhead()
{
	if(this->CanGoAhead())
	{
		table.MoveToNext();
	}
}

#endif