//-------------------------------------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TListQuene 模板类
// = Version	:   ver2.0
// = Author		:   wlw
// = CreateDate	:   2002-09-09
// = Description:   TListQuene 声明 基于单向链表的队列
// = Maintainers: 
//                  
//-------------------------------------------------------------------------------------------------------+
#ifndef _TLISTQUENE_H_
#define _TLISTQUENE_H_

#ifndef _TQUENE_H_
#include "TQuene.h"
#endif

#ifndef _TLIST_H_
#include "TList.h"
#endif

template<class T> class TListQuene:public TQuene<T>
{
public:
	TListQuene(long length = -1);
	virtual ~TListQuene();

	//如quene为空,忽略并返回 false
	virtual bool DeQuene(T&t);
	
	//如果超过maxLength,忽略并返回 false
	virtual bool EnQuene(T const&t);

	virtual void Clear();

	virtual long GetLength();

	virtual bool GetHeadData(T&t);
	virtual bool GetTailData(T&t);

	virtual T& operator[](long i);

protected:
	TList<T> list;

};


template<class T>
TListQuene<T>::TListQuene(long length):TQuene<T>(length)
{
	
}

template<class T>
TListQuene<T>::~TListQuene()
{
}

template<class T>
T& TListQuene<T>::operator[](long i)
{
	return list[i];
}

template<class T>
bool TListQuene<T>::DeQuene(T&t)
{
	if (this->IsEmpty())
	{
		return false;
	}
	list.MoveToFirst();
	t = list.GetCurData();
	list.DelCur();	
	return true;
}

template<class T>
bool TListQuene<T>::EnQuene(T const&t)
{
	if (this->IsLengthLimited() && GetLength() >= this->maxLength)
	{
		return false;
	}
	list.AddTail(t);
	return true;
}

template<class T>
long TListQuene<T>::GetLength()
{
	return list.GetLength();
}

template<class T>
bool TListQuene<T>::GetHeadData(T&t)
{
	if (this->IsEmpty())
	{
		return false;
	}
	list.MoveToFirst();
	t = list.GetCurData();
	return true;
}

template<class T>
bool TListQuene<T>::GetTailData(T&t)
{
	if (this->IsEmpty())
	{
		return false;
	}
	list.MoveToLast();
	t = list.GetCurData();
	return true;
}

template<class T>
void TListQuene<T>::Clear()
{
	list.Clear();
}

#endif