/*
 * CBtreeFunc.cpp
 *
 *  Created on: 2012-3-5
 *      Author: liyouhuan
 */
#include "CBtreeH.h"
using namespace std;
KeyType KeyNULL;

eletype _eletype;
int _ii;
string filePath_s2sID;
string filePath_sID2s;
string filePath_o2sID;
string filePath_opID2sID;
FILE * _log_btree;
// 在中间结点中插入键
bool mItnlNode::Insert( mNode * pNode)
{
	if(getCount() >= MAXNUM_KEY)
	{
		printf("err large\n");
		return false;
	}
	KeyType & data = pNode ->getKey(1);
//	for check

	int _ikey = this ->iInsert(data);
	if(_ikey <= 1)
	{
		printf("err in insert itnl\n");
		system("pause"); exit(0);
	}
	//  在要插入的点是在最右端时要特殊处理, solved
	for(int i = getCount() + 1; i > _ikey; i --)
	{
		this ->setElement(i,  this ->getElement(i - 1) );
	}
	mitnldata _mitnl;
	_mitnl.mitnldata_Initial();
	_mitnl.mPointer = pNode;
	_mitnl.mAddr_sonFB = pNode ->getAddrFB();
	_mitnl.mKey = data;
	this ->setElement(_ikey, _mitnl);
	this ->IncCount();
	pNode ->setFather(this);
	this ->setMemory(_ikey);
	this ->setModify();
	return true;
}

// 在中间结点中删除键，以及该键后的指针
int mItnlNode::Delete(const KeyType & _keytype)
{
	int _index = -1;
	int _ibegin = 1, _iend = getCount();
	int _imiddle;
	// 二分查找index
	while(_ibegin < _iend)
	{
		_imiddle = (_ibegin + _iend) / 2;
		if(ItnlData[_ibegin].mKey == _keytype)
		{
			_index =  _ibegin;
			break;
		}
		if(ItnlData[_iend].mKey == _keytype)
		{
			_index =  _iend;
			break;
		}
		if(_ibegin == _iend - 1)	break;
		if(ItnlData[_imiddle].mKey> _keytype)
		{
			_iend = _imiddle;
		}
		else
		{
			_ibegin = _imiddle;
		}
	}

    //任何一个不是根节点或不是叶子节点的节点必须保证包含至少两个元素
    // 对于insert， index = 1 的时候一定是整棵树的最右边！！！
    // delete则不同
	if(_index == 1 && this ->getFather() != NULL)
	{
		mItnlNode * itnl_father = (mItnlNode *)(this ->getFather() );
		KeyType & f_data = this ->getKey(1);
		KeyType & i_data = this ->getKey(2);
		while(itnl_father != NULL)
		{
            // 此处同insert不同，审慎其不同之处
			int tmp_key = itnl_father ->iExist(f_data);
			if(tmp_key < 1)
			{
				cout << "bug tmp_key" << endl;
				system("pause");
				exit(0);
			}
			itnl_father ->setKey(tmp_key, i_data);
			itnl_father ->setMemory(tmp_key);
			itnl_father ->setModify();
			if(tmp_key != 1) break;

			itnl_father = (mItnlNode *)(itnl_father ->getFather()  );
		}
	}
	if(_index > 0 && _index <= getCount())
	{
		for(int i = _index; i < getCount(); i ++)
		{
			this ->setElement(i, this ->getElement(i + 1)  );
		}
		(this ->getElement(getCount()) ).cleardata();
		this ->DecCount();
		this ->setModify();
		return _index;
	}
	else
	{
		cout << "bug index" << endl;
	}
	return -1;
}
KeyType & mItnlNode::Split(mItnlNode* pNode)
{
	pNode ->setCount(ORDER_V);
	for(int i = ORDER_V + 1; i <= MAXNUM_KEY; i ++)
	{
		pNode ->setElement(i - ORDER_V,   this ->getElement(i)  );

		if(pNode ->isInMemory(i - ORDER_V))//debug for long time!!!
		{
			(   pNode ->getPointer(i - ORDER_V)   ) ->setFather(pNode);
		}
	}
	this ->setCount(ORDER_V);
	this ->setModify();
	pNode ->setModify();
	return (pNode ->getElement(1)).mKey;
}

// 结合结点，把指定中间结点的数据全部剪切到本中间结点
bool mItnlNode::Combine(mItnlNode * pNode)
{
	if(this ->getCount() + pNode ->getCount() > MAXNUM_KEY)
		return false;
	int _count = this ->getCount();
	for(int i = 1; i <= pNode ->getCount(); i ++)
	{
		this ->setElement(_count + i, pNode ->getElement(i) );
		this ->IncCount();
	}
	return true;
}

// 从另一结点移一个元素到本结点
bool mItnlNode::MoveOneElement(mNode* pNode)
{


	return false;
}

// 清除叶子结点中的数据

// 在叶子结点中插入数据
bool mLeafNode::Insert(const mleafdata & _leafdata)
{
	const KeyType & data = _leafdata.mData;
	{
//		fputs(data.sKey, _log_btree);
//		fputs("\n", _log_btree);
	}
	if(getCount() >= MAXNUM_KEY)
	{
		printf("err count too large\n");
		return false;
	}
	//  返回i， data 介于i - 1 与 i 之间, 要放在i 上
	int _i_insert = this ->iInsert(data);
	//  还要考虑仅根节点是叶子节点的情况， 需要再加个条件
	if(_i_insert == 1 && this ->getFather() != NULL)
	{
		mItnlNode * _pFather = (mItnlNode *)(this ->getFather());
		KeyType & f_data	= this ->getKey(1);
		while(_pFather != NULL)
		{
			int _ikey = _pFather ->iExist(f_data);
			//check
			if(_ikey <= 0 || _ikey > _pFather ->getCount())
			{
				printf("err in _ikey\n");
				system("pause");
				exit(0);
			}
			//同步使得内存位等其它位失效， 策略失策， 弥补之。。
			_pFather ->setKey(_ikey, _leafdata.mData);
			_pFather ->setMemory(_ikey);
			_pFather ->setModify();
			_pFather = (mItnlNode *)(_pFather ->getFather());
		}
	}

	for(int i = getCount() + 1; i > _i_insert; i --)
	{
		this ->setElement(i,  this ->getElement(i - 1)  );
	}

	this ->setElement(_i_insert, _leafdata);
	this ->IncCount();
	this ->setModify();
	return true;
}

/*
 * 删除成功返回删除的key的下标， 失败则返回-1
 * 设置修改位
 * 若是最左端的元素则向上修改对应需要修改的父节点， 此处与insert不同
 * insert若出现最左端必然是整棵树的最左端
 */
int mLeafNode::Delete(KeyType & _keytype)
{
	int _index = -1;
	int _ibegin = 1, _iend = getCount();
	int _imiddle;
	while(_ibegin < _iend)
	{
		_imiddle = (_ibegin + _iend) / 2;
		if(LeafData[_ibegin].mData == _keytype)
		{
			_index =  _ibegin;
			break;
		}
		if(LeafData[_iend].mData == _keytype)
		{
			_index =  _iend;
			break;
		}
		if(_ibegin == _iend - 1)	break;
		if(LeafData[_imiddle].mData> _keytype)
		{
			_iend = _imiddle;
		}
		else
		{
			_ibegin = _imiddle;
		}
	}
    //任何一个不是根节点或不是叶子节点的节点必须保证包含至少两个元素
    // 对于insert， index = 1 的时候一定是整棵树的最右边！！！
    // delete则不同
	if(_index == 1 && this ->getFather() != NULL)
	{
		mItnlNode * itnl_father = (mItnlNode *)(this ->getFather() );
		KeyType & f_data = this ->getKey(1);
		KeyType & i_data = this ->getKey(2);
		while(itnl_father != NULL)
		{
		    // 此处同insert不同，审慎其不同之处
			int tmp_key = itnl_father ->iExist(f_data);
			if(tmp_key < 1)
			{
				cout << "bug tmp_key" << endl;
				system("pause"); exit(0);
			}
			itnl_father ->setKey(tmp_key, i_data);
			itnl_father ->setMemory(tmp_key);
			itnl_father ->setModify();
			if(tmp_key != 1) break;

			itnl_father = (mItnlNode *)(itnl_father ->getFather()  );
		}
	}
	if(_index > 0 && _index <= getCount())
	{
		(this ->getElement(_index)).cleardata();
		for(int i = _index; i < getCount(); i ++)
		{
			this ->setElement(i, this ->getElement(i + 1)  );
		}
		(this ->getElement(getCount() )).cleardata();
		this ->DecCount();
		this ->setModify();
		return _index;
	}
	else
	{
		cout << "bug index" << endl;
	}
	return -1;
}
//重载delete of leaf
int mLeafNode::Delete(KeyType & _keytype, char partval[], int & pvFlag)
{
	int _index = -1;
	int _ibegin = 1, _iend = getCount();
	int _imiddle;
	while(_ibegin < _iend)
	{
		_imiddle = (_ibegin + _iend) / 2;
		if(LeafData[_ibegin].mData == _keytype)
		{
			_index =  _ibegin;
			break;
		}
		if(LeafData[_iend].mData == _keytype)
		{
			_index =  _iend;
			break;
		}
		if(_ibegin == _iend - 1)	break;

		if(LeafData[_imiddle].mData> _keytype)
		{
			_iend = _imiddle;
		}
		else
		{
			_ibegin = _imiddle;
		}
	}

	if(_index <= 0 || _index > getCount())	return -1;
	bool del_pv_ret = this ->getElement(_index).deletePartVal(partval, pvFlag);

	// delete fail, return false;
	if(del_pv_ret ==  false)
		return -1;

	// delete successfully and element no null, return true
	if(pvFlag == FLAG_NO_ZERO)
		return _index;

    //如果删除成功并且元素变为空， 则继续删除对应的key


    //任何一个不是根节点或不是叶子节点的节点必须保证包含至少两个元素
    // 对于insert， index = 1 的时候一定是整棵树的最右边！！！
    // delete则不同
	if(_index == 1 && this ->getFather() != NULL)
	{
		mItnlNode * itnl_father = (mItnlNode *)(this ->getFather() );
		KeyType & f_data = this ->getKey(1);
		KeyType & i_data = this ->getKey(2);
		while(itnl_father != NULL)
		{
		    // 此处同insert不同，审慎其不同之处
			int tmp_key = itnl_father ->iExist(f_data);
			if(tmp_key < 1)
			{
				cout << "bug tmp_key" << endl;
				system("pause"); exit(0);
			}
			itnl_father ->setKey(tmp_key, i_data);
			itnl_father ->setMemory(tmp_key);
			itnl_father ->setModify();
			if(tmp_key != 1) break;

			itnl_father = (mItnlNode *)(itnl_father ->getFather()  );
		}
	}
	if(_index > 0 && _index <= getCount())
	{
		(this ->getElement(_index)).cleardata();
		for(int i = _index; i < getCount(); i ++)
		{
			this ->setElement(i, this ->getElement(i + 1)  );
		}
		(this ->getElement(getCount() )).cleardata();
		this ->DecCount();
		this ->setModify();
		return _index;
	}
	return -1;
}



// 分裂叶子结点，把本叶子结点的后一半数据剪切到指定的叶子结点中
KeyType & mLeafNode::Split(mLeafNode * pNode)
{
	for(int i = ORDER_V + 1; i <= MAXNUM_KEY; i ++)
	{
		pNode ->setElement(i - ORDER_V,   this ->getElement(i)  );
	}
	this ->setCount(ORDER_V);
	pNode ->setCount(ORDER_V);
	this ->setModify();
	pNode ->setModify();
	return (pNode ->getElement(1)).mData;
}

// 结合结点，把指定叶子结点的数据全部剪切到本叶子结点
bool mLeafNode::Combine(mLeafNode * pNode)
{
	int this_count = this ->getCount();
	int pnode_count = pNode ->getCount();
	for(int i = 1; i <= pnode_count; i ++)
	{
		this ->setElement(this_count + i, pNode ->getElement(i) );
		this ->IncCount();
	}
	return false;
}
// 查找对应的叶子结点
mLeafNode* BPlusTree::SearchLeafNode(const KeyType & data)const
{
	mNode * pNode = mRoot;
	if(mRoot ->getType() == NODE_TYPE_LEAF)
	{
		return (mLeafNode *)mRoot;
	}
	else// no check
	{
        /*
         * while 循环
         * 当前还是中间节点
         * 找到下层入口下标
         * 判断是否超出左边界， 是的话直接到底， pNode 指向叶子节点， break
         * 总之， 最后肯定是pNode指向叶子节点
         * 所以， 插入时还要判断是否超过左边界， 是的话要修改上层父节点的左边界
         * Search 的时候都要注意边界的率先判断, 还有当前叶节点可能是根节点
         */
//	    int _floor = 1;
		while(pNode ->getType() == NODE_TYPE_INTERNAL)
		{
			mItnlNode * _pItnl = (mItnlNode *)pNode;
			int _enter_ret = _pItnl ->iNextFloor(data);
			int _enter_num = _enter_ret;
			if(_enter_ret <= 0)
			{
				_enter_num = 1;
			}
			bool _in_memory = _pItnl ->isInMemory(_enter_num);
			if(!_in_memory)
			{
				long long int _addrfb = _pItnl ->getSonAddr(_enter_num);
				mNode * _pmnode = ReadNode(mfp, _addrfb);
				_pItnl ->setPointer(_enter_num, _pmnode);
				_pItnl ->setMemory(_enter_num);
				pNode = _pmnode;
			}
			else
			{
				pNode = pNode ->getPointer(_enter_num);
			}
		}
		if(pNode == NULL){
			cout << "pNode is err in searchLeafNode" << endl;
			system("pause"); exit(0);
		}
		if(pNode ->getType() != NODE_TYPE_LEAF)
		{
			cout << "err in searchleafnode" << endl;
			system("pause"); exit(0);
		}
		return (mLeafNode*) pNode;
	}
	return NULL;
}
// 在树中查找数据
bool BPlusTree::Search(KeyType & data, mleafdata & _ret)//增加一参数， 用于接收查找过程中进入的叶子节点
{
	mLeafNode * _pLeaf = SearchLeafNode(data);
	int _ikey = _pLeaf ->iExist(data);
	if(_ikey > _pLeaf ->getCount())
	{
		printf("err in ikey\n");
		exit(0);
	}
	if(_ikey > 0)
	{
		/* mValue* in _ret should not be released */
		_ret.assign_val_ptr(_pLeaf ->getElement(_ikey));
//		_ret = _pLeaf ->getElement(_ikey);
		return true;
	}

	//cout << "not find, the iKey is " << _ikey << endl;
	return false;
}

bool BPlusTree::Insert(const mleafdata & _leafdata)
{
	{

	}
	const KeyType & data = _leafdata.mData;
	mLeafNode * _pOldLeaf = SearchLeafNode(data);
	int _ikey = _pOldLeaf ->iExist(data);
	if(_ikey > 0)
	{
        if(! _pOldLeaf ->getModify())
        {
            DelDisk(mfp, _pOldLeaf ->getAddrFB(), mblockQueue);
        }
        //      set modified in dupInsert
		return _pOldLeaf ->dupInsert(_leafdata, _ikey);
	}

	{
		this ->insert_count ++;
	}
	if(_pOldLeaf ->getCount() < MAXNUM_KEY)
	{
		if(! _pOldLeaf ->getModify())
		{
			DelDisk(mfp, _pOldLeaf ->getAddrFB(), mblockQueue);
		}
//		set modified in insert
		return _pOldLeaf ->Insert(_leafdata);
	}
	else
	{
//		set modified in mnode_initial;
		mLeafNode * _pNewLeaf = new mLeafNode;
//		new node need a addrfb
		long long int _addr_newleaf = mblockQueue.Pop();
		_pNewLeaf ->setAddrFB(_addr_newleaf);

//      _key_tmp 也就将是_pnewleaf的第一个元素的key
//		set modified in split;
		if(! _pOldLeaf ->getModify())
		{
			DelDisk(mfp, _pOldLeaf ->getAddrFB(), mblockQueue);
		}
		KeyType &_key_tmp = _pOldLeaf ->Split(_pNewLeaf);
		if(data < _key_tmp)	{	_pOldLeaf ->Insert(_leafdata);	}
		else				{	_pNewLeaf ->Insert(_leafdata);	}

		mItnlNode * _pFather = (mItnlNode*)(_pOldLeaf ->getFather());

		if(_pFather == NULL)
		{
//          _pOldLeaf以前是根节点，要把offset = 0 让出来
//          还存在占用外存链的情况下则需要释放外存链
//			if(!preModified)
//			{
//				DelDisk(mfp, 0l, mblockQueue);
//			}
			long long int _addr_new = mblockQueue.Pop();
			_pOldLeaf ->setAddrFB(_addr_new);
//			setmodified in initial;
			mItnlNode * _pItnl = new mItnlNode;
			//      分配新的首地址ַ
			long long int _addr_root = 0;
			long long int _addr_2 = _pNewLeaf ->getAddrFB();
			long long int _addr_1 = _pOldLeaf ->getAddrFB();
			KeyType & _key_1 = _pOldLeaf ->LeafData[1].mData;
			KeyType & _key_2 = _pNewLeaf ->LeafData[1].mData;

			_pOldLeaf ->setFather(_pItnl);
			_pNewLeaf ->setFather(_pItnl);
			_pItnl ->setAddrFB(_addr_root);
			_pItnl ->setCount(2);
			_pItnl ->setPointer(1, _pOldLeaf);
			_pItnl ->setPointer(2, _pNewLeaf);
			_pItnl ->setKey(1, _key_1);
			_pItnl ->setKey(2, _key_2);
			_pItnl ->setSonAddr(1, _addr_1);
			_pItnl ->setMemory(1);
			_pItnl ->setMemory(2);
			_pItnl ->setSonAddr(2, _addr_2);
			this ->setRoot(_pItnl);
			return true;
		}
		else
		{
			bool _ret = InsertItnlNode(_pFather, _pNewLeaf);
			return _ret;
		}
	}
	return false;
}
/* dupInsert will replace previous value */
bool mLeafNode :: dupInsert(const mleafdata & _mleafdata, int _index_insert)
{

	mleafdata & _tmp_leafdata = (this ->getElement(_index_insert));

	_tmp_leafdata = _mleafdata;
	this ->setModify();

	return true;
}

/* 删除某数据
 * 涉及删除节点时注意回收外存~~
*/
bool BPlusTree::Delete(KeyType & data)
{
	mLeafNode * _pOldLeaf = SearchLeafNode(data);
	// for when _ikey = 1
	//if ok , return the index of the deleted
	//如果idelete是1的话则函数里会是否进行向上删除  考虑
	int _idelete = _pOldLeaf ->Delete(data);
	if(_idelete < 0)	return false;

	mItnlNode * _pFather = (mItnlNode* )(_pOldLeaf ->getFather());
	if(_pFather == NULL)
	{
		return true;
	}

	if(_pOldLeaf ->getCount() >= ORDER_V)
	{
	    //如果idelete = 1 向上删除  不需要
		return true;
	}

	// count < 50%
	int flag = FLAG_LEFT;
	// 右兄弟优先
	mLeafNode * _pBrother = (mLeafNode*)(_pOldLeaf ->getBrother(flag));

	//brother > 50%
	if(_pBrother ->getCount() > ORDER_V)
	{
		if(FLAG_LEFT == flag)
		{
			mleafdata  & _leafdata = _pBrother ->getElement(_pBrother ->getCount() );
			KeyType & _key = _leafdata.mData;
			_pOldLeaf ->Insert(_leafdata);
			_pBrother ->Delete(_key);
		}
		else
		{
			mleafdata  & _leafdata = _pBrother ->getElement(1 );
			KeyType & _key = _leafdata.mData;
			_pOldLeaf ->Insert(_leafdata);
			_pBrother ->Delete(_key);
		}
		return true;
	}

	// combine
	if(FLAG_LEFT == flag)
	{
		_pBrother ->Combine(_pOldLeaf);
		KeyType & _key = _pOldLeaf ->getKey(1);
		bool dRet =  this ->DeleteItnlNode(_pFather, _key);
		DelDisk(this ->mfp, _pOldLeaf ->getAddrFB(), this ->mblockQueue);
		this ->mblockQueue.Push(_pOldLeaf ->getAddrFB());
		delete _pOldLeaf;
		return dRet;
	}
	else
	{
		_pOldLeaf ->Combine(_pBrother);
		KeyType & _key = _pBrother ->getKey(1);
		bool dRet =  this ->DeleteItnlNode(_pFather, _key);
		DelDisk(this ->mfp, _pBrother ->getAddrFB(), this ->mblockQueue);
		this ->mblockQueue.Push(_pBrother ->getAddrFB());
		delete _pBrother;
		return dRet;
	}

	cout << "bug run" << endl;
	return false;
}
//重载删除函数
bool BPlusTree :: Delete(KeyType & data, char PartVal[])
{
	mLeafNode * _pOldLeaf = SearchLeafNode(data);
    // for when _ikey = 1
    //if ok , return the index of the deleted
    //如果idelete是1的话则函数里会是否进行向上删除  考虑
	int pvFlag = FLAG_ZERO;
	int _idelete = _pOldLeaf ->Delete(data, PartVal, pvFlag);
	if(_idelete < 0)	return false;
	if(pvFlag == FLAG_NO_ZERO) return true;

	mItnlNode * _pFather = (mItnlNode* )(_pOldLeaf ->getFather());
	if(_pFather == NULL)
	{
		return true;
	}

	if(_pOldLeaf ->getCount() >= ORDER_V)
	{
	    //如果idelete = 1 向上删除  不需要
		return true;
	}

	// count < 50%
	int flag = FLAG_LEFT;
	// ���ֵ�����
	mLeafNode * _pBrother = (mLeafNode*)(_pOldLeaf ->getBrother(flag));

	//brother > 50%
	if(_pBrother ->getCount() > ORDER_V)
	{
		if(FLAG_LEFT == flag)
		{
			mleafdata  & _leafdata = _pBrother ->getElement(_pBrother ->getCount() );
			KeyType & _key = _leafdata.mData;
			_pOldLeaf ->Insert(_leafdata);
			_pBrother ->Delete(_key);
		}
		else
		{
			mleafdata  & _leafdata = _pBrother ->getElement(1 );
			KeyType & _key = _leafdata.mData;
			_pOldLeaf ->Insert(_leafdata);
			_pBrother ->Delete(_key);
		}
		return true;
	}

	// combine
	if(FLAG_LEFT == flag)
	{
		_pBrother ->Combine(_pOldLeaf);
		KeyType & _key = _pOldLeaf ->getKey(1);
		bool dRet =  this ->DeleteItnlNode(_pFather, _key);
		DelDisk(this ->mfp, _pOldLeaf ->getAddrFB(), this ->mblockQueue);
		this ->mblockQueue.Push(_pOldLeaf ->getAddrFB());
		delete _pOldLeaf;
		return dRet;
	}
	else
	{
		_pOldLeaf ->Combine(_pBrother);
		KeyType & _key = _pBrother ->getKey(1);
		bool dRet =  this ->DeleteItnlNode(_pFather, _key);
		DelDisk(this ->mfp, _pBrother ->getAddrFB(), this ->mblockQueue);
		this ->mblockQueue.Push(_pBrother ->getAddrFB());
		delete _pBrother;
		return dRet;
	}

	cout << "bug run" << endl;
	return false;
	return false;
}
void BPlusTree::Flush(){
	this ->StoreTree();
	this ->ClearTree();
}
// 清除整个树，删除所有结点
void BPlusTree :: ClearTree()
{
	queue<mNode *> pQueue[100];
	stack<mNode *> pStack;
	int nFloor = 0;
	mNode * pRoot = this ->getRoot();
	if(pRoot == NULL)	return;
	mNode * pNode;
	pQueue[nFloor].push(pRoot);
	pStack.push(pRoot);
	//printf("\n\nthe %d floor:\n\n", nFloor + 1);
	while(!pQueue[nFloor].empty())
	{
		pNode = pQueue[nFloor].front();
		pQueue[nFloor].pop();

		if(pNode ->getType()  == NODE_TYPE_INTERNAL)
		{
			for(int i = 1; i <= pNode ->getCount(); i ++)
			{
				if(pNode ->isInMemory(i))
				{
					pQueue[nFloor + 1].push(pNode ->getPointer(i));
					pStack.push(  pNode ->getPointer(i)  );
				}
			}
		}
		if(pQueue[nFloor].empty())
		{
			nFloor ++;
		}
	}

	//cout << "delete node" << endl;

	int _n_node = 0;

	while(!pStack.empty())
	{
		pNode = pStack.top();
		pStack.pop();
		delete pNode;
		_n_node ++;
		pNode = NULL;
		if(_n_node % 400 == 0)
		{
			//cout << "_delete_node: " << _n_node << "   ";
		}
	}
	if(_n_node > 1)
	{
		cout << "clear end " << this ->getTreeFileName().c_str() << endl;
	}
	this ->setRoot(NULL);
	fclose(this ->mfp);
	return;
}

// 检查树是否满足B+树的定义
//bool BPlusTree::CheckTree()
//{}

// 递归检查结点及其子树是否满足B+树的定义
//bool BPlusTree::CheckNode(mNode* pNode)
//{}

// 打印整个树
//void BPlusTree::PrintTree(FILE * ifp)
//{}

// 打印某结点
//void BPlusTree::PrintNode(mNode* pNode, FILE * ifp)
//{}



//递归函数：插入键到中间结点
//key即为pNode中的首个key
bool BPlusTree::InsertItnlNode(mItnlNode* pNode, mNode* pSon)
{
	if(pNode == NULL || pNode ->getType() == NODE_TYPE_LEAF)
	{
		return false;
	}

	KeyType data;
	if(pSon ->getType() == NODE_TYPE_LEAF)
	{
		data = ((mLeafNode*)pSon) ->LeafData[1].mData;
	}
	else
	if(pSon ->getType() == NODE_TYPE_INTERNAL)
	{
		data = ((mItnlNode*)pSon) ->ItnlData[1].mKey;
	}
	else
	{
		printf("err in pson\n");
		system("pause"); exit(0);
	}

	if(pNode ->getCount() < MAXNUM_KEY)
	{
//		setmodified in insert;
		if(!pNode ->getModify())
		{
			DelDisk(mfp, pNode ->getAddrFB(), mblockQueue);
		}
		bool _pI_Ret;
		_pI_Ret = pNode ->Insert(pSon);
	}
	else
	{
		mItnlNode * _pOldItnl = pNode;
//		setmodified in mnode_intial;
		mItnlNode * _pNewItnl = new mItnlNode;
		long long int _addr_newitnl = mblockQueue.Pop();
		_pNewItnl ->setAddrFB(_addr_newitnl);
		if(!pNode ->getModify())
		{
			DelDisk(mfp, pNode ->getAddrFB(), mblockQueue);
		}
		KeyType & _key_tmp = _pOldItnl ->Split(_pNewItnl);

		if(_key_tmp > data)
		{
			_pOldItnl ->Insert(pSon);
		}
		else
		{
			_pNewItnl ->Insert(pSon);
		}

		mItnlNode * _pFather = (mItnlNode *)(_pOldItnl ->getFather());

		if(_pFather == NULL)
		{
//          原offset = 0处块以及相应后续链接块先清除
//          判断是否需要删除的外存链
//			if(!preModified)
//			{
//				DelDisk(mfp, 0l, mblockQueue);
//			}
			int _look_;
			_look_ = _ii;
			long long int _addr_new = mblockQueue.Pop();
			_pOldItnl ->setAddrFB(_addr_new);
//			setmodified in mnode_initial;
			mItnlNode * _pItnl = new mItnlNode;
			//分配新的首地址
			long long int _addr_root = 0l;
			long long int _addr_1 = _pOldItnl ->getAddrFB();
			long long int _addr_2 = _pNewItnl ->getAddrFB();
			KeyType & _key_1 = _pOldItnl ->ItnlData[1].mKey;
			KeyType & _key_2 = _pNewItnl ->ItnlData[1].mKey;

			_pOldItnl ->setFather(_pItnl);
			_pNewItnl ->setFather(_pItnl);
			_pItnl ->setAddrFB(_addr_root);
			_pItnl ->setCount(2);
			_pItnl ->setPointer(1, _pOldItnl);
			_pItnl ->setPointer(2, _pNewItnl);
			_pItnl ->setKey(1, _key_1);
			_pItnl ->setKey(2, _key_2);
			_pItnl ->setSonAddr(1, _addr_1);
			_pItnl ->setSonAddr(2, _addr_2);
			_pItnl ->setMemory(1);
			_pItnl ->setMemory(2);
			this ->setRoot(_pItnl);
			return true;
		}
		else
		{
			bool _ret = InsertItnlNode(_pFather, _pNewItnl);
			return _ret;
		}
	}
	return false;
}
/*
 * 删除key对应的元素并在delete函数中完成对父节点的修改， 注意内存位的同步修改
 * 若节点 > 50% 或为根节点， 则结束
 *
 */
// 递归函数：在中间结点中删除键
bool BPlusTree::DeleteItnlNode(mItnlNode* pItnl, KeyType & key)
{
	int _idelete = pItnl ->Delete(key);
	if(_idelete < 0)
	{
		cout << "bug idelete" << endl;
		system("pause"); exit(0);
	}

	mItnlNode * _pFather = (mItnlNode*)(pItnl ->getFather());
	if(_pFather == NULL || pItnl ->getCount() > ORDER_V)
	{
		return true;
	}
	int flag = FLAG_LEFT;
	mItnlNode * _pBrother = (mItnlNode *)(pItnl ->getBrother(flag));
	// brother > 50%
	if(_pBrother ->getCount() > ORDER_V)
	{
		if(FLAG_LEFT == flag)
		{
			mitnldata & _itnldata = _pBrother ->getElement(_pBrother ->getCount() );
			pItnl ->Insert(_itnldata.mPointer);// maybe have bug~~~~~
			_pBrother ->Delete(_itnldata.mKey);
		}
		else
		{
			mitnldata & _itnldata = _pBrother ->getElement(1);
			pItnl ->Insert(_itnldata.mPointer);// maybe have bug~~~~~
			_pBrother ->Delete(_itnldata.mKey);
		}
		return true;
	}

	// brother = 50%  combine
	if(FLAG_LEFT == flag)
	{
		_pBrother ->Combine(pItnl);
		KeyType & _key = pItnl ->getKey(1);
		bool dRet = this ->DeleteItnlNode(_pFather, _key);
		DelDisk(this ->mfp, pItnl ->getAddrFB(), this ->mblockQueue);
		this ->mblockQueue.Push(pItnl ->getAddrFB());
		delete pItnl;
		return dRet;
	}
	else
	{
		pItnl ->Combine(_pBrother);
		KeyType & _key = _pBrother ->getKey(1);
		bool dRet = this ->DeleteItnlNode(_pFather, _key);
		DelDisk(this ->mfp, _pBrother ->getAddrFB(), this ->mblockQueue);
		this ->mblockQueue.Push(_pBrother ->getAddrFB());
		delete _pBrother;
		return dRet;
	}
	cout << "run bug" << endl;
	return false;
}
//保存树结构
/*
 * 保证两点：
 * 1、内存位标记都正确
 * 2、修改位标记都正确
 */
void BPlusTree :: StoreTree()
{
	mNode * pRoot = this ->getRoot();
	FILE * fp = this ->mfp;
	queue<mNode*> pQueue;
	pQueue.push(pRoot);
	mNode * pNode;
	int _i_ord = 0;
	bool any = false;

	while(!pQueue.empty())
	{
		pNode = pQueue.front();
		pQueue.pop();
//      内有unmodify
		if(pNode->getModify()){
			any = true;
		}
		WriteNode(pNode, fp, this ->mblockQueue);
		_i_ord ++;
		if(_i_ord % 1600 == 0)
			cout << " - _i_ord= " << _i_ord;

		if(pNode ->getType() == NODE_TYPE_INTERNAL)
		{
			mItnlNode * pItnl = (mItnlNode *)pNode;
			for(int i = 1; i <= pNode ->getCount(); i ++)
			{
				if(pItnl ->isInMemory(i))
				{
					pQueue.push(pItnl ->getPointer(i));
				}
			}
		}
	}
	cout << endl;
	char _queuefile[1024];
	strcpy(_queuefile, mTreeName);
	strcat(_queuefile, "_queue.btree");
	this ->mblockQueue.WriteQueue(_queuefile);
	fflush(this ->mfp);
	fflush(this ->mfp);
	if(any)
	{
		cout << "store end " << this ->getTreeFileName().c_str() << endl;
	}
}

//
//打印树
void BPlusTree :: PrintTree()
{
	queue<mNode *> pQueue[100];
	int nFloor = 0;
	mNode * pRoot = this ->getRoot();
	if(pRoot == NULL)
	{
		cout << "root null" << endl;
		return;
	}
	mNode * pNode;
	pQueue[nFloor].push(pRoot);
	int fThreshold;
	cout << "input the floor threshold" << endl;
	scanf("%d", & fThreshold);
	printf("\n\nthe %d floor:\n\n", nFloor + 1);
	int _i_ord = 0;
	while(!pQueue[nFloor].empty() && nFloor < fThreshold)
	{
		pNode = pQueue[nFloor].front();
		pQueue[nFloor].pop();
		pNode ->printNode();
		cout << "##" << _i_ord ++ << "## ";

		if(pNode ->getType()  == NODE_TYPE_INTERNAL)
		{
			for(int i = 1; i <= pNode ->getCount(); i ++)
			{
				if(pNode ->isInMemory(i))
				{
					pQueue[nFloor + 1].push(pNode ->getPointer(i));
				}
			}
		}
		if(pQueue[nFloor].empty())
		{
			nFloor ++;
			printf("\n\nthe %d floor:\n\n", nFloor + 1);
		}
	}
}

/*
 * 新建节点需要提供的信息：
 *     节点的首块地址
 *     读出type int
 *     读出count int
 *     读出count_block int
 *     读出blocklink mBlockLink
 *
 *     读出各元素后， 通过下块地址转移， 转以后读入块元素个数， 再读入块链接
 *
 */

mNode * ReadNode(FILE * fp, long long _addrfb)//每个新建的节点都有分配的或上层节点给予的首块存储区地址
{
	fseek(fp, _addrfb, SEEK_SET);
	int _type_tmp;
	int _count_tmp;
	int _count_block_ele;
	mBlockLink _curblocklink;
	fread(&_type_tmp, sizeof(_type_tmp), 1, fp);
	fread(&_count_tmp, sizeof(_count_tmp), 1, fp);
	fread(&_count_block_ele, sizeof(_count_block_ele), 1, fp);
	fread(&_curblocklink, sizeof(_curblocklink), 1, fp);
	int size_int = sizeof(int);
	int size_blocklink = sizeof(mBlockLink);

	NODE_TYPE _nodetype = (NODE_TYPE)_type_tmp;

	int _i_tmp = 1;
	if(_nodetype == NODE_TYPE_LEAF)
	{
		mLeafNode * _pLeaf = new mLeafNode;
		_pLeaf ->setCount(_count_tmp);
		_pLeaf ->unModify();
		_pLeaf ->setAddrFB(_addrfb);
		fread(&(_pLeaf ->leafLink), sizeof(_pLeaf ->leafLink), 1, fp);
        /*
         * while cycle里
         *  for cycle
         *  通过块内元素个数读入
         */

        /*
         * 读完后， 先记录当前独到节点的第几个元素
         * 文件指针偏移至指示的下一块
         * 再读入块内元素个数及上下块结构体变量
         * 继续读入， 直到元素个数达到count值
         */
        /*
         * 先把块的剩余空间写入 -1， 再写入len（便于准确申请空间）， sizeleft 减去三个4（12字节， “-1”“len”“sizeleft自身”），
         * 写入sizeleft：　到时需要分段读入　　然后申请块，　在将块链接写入之前位置
         * 写完剩余的空间后， 调整buffer及其size
         * 然后每多申请一块则先跳过一个整型以及快链接结构体的大小，　以备写入当前块存放的长度buffer(考虑最后一块好处理)，以及块链接
         * 写入剩余的buffer后回写长度及块链接， 若是最后一块， 要注意整理： fp指针 & sizeleft；
         */
		bool ReadIn = true;
		while(_i_tmp <= _count_tmp)
		{
			for(int i = 0; i < _count_block_ele; i ++)
			{
				ReadIn = _pLeaf ->LeafData[_i_tmp].Read_mleafdata(fp);
				if(!ReadIn)
				{
					int _size_buffer = 0;
					int _len = 0;
					int _size_left = 0;
					int _size_inBlock = 0;
					_pLeaf ->LeafData[_i_tmp].pVal = new mValue;
					fread(&_len, size_int, 1, fp);
					_size_buffer = _len + 1;
					char * _buffer = new char[_size_buffer];
					_pLeaf ->LeafData[_i_tmp].pVal ->Term[0] = _buffer;
					_pLeaf ->LeafData[_i_tmp].pVal ->lenTerm[0] = _len;
					fread(&_size_left, size_int, 1, fp);
					fread(_buffer, sizeof(char), _size_left, fp);
					_buffer += _size_left;
					_size_buffer -= _size_left;
					while(_size_buffer > 0)
					{
						fseek(fp, _curblocklink.nextBlockAddr, SEEK_SET);
						fread(&_size_inBlock, sizeof(_size_inBlock), 1, fp);
						fread(&_curblocklink, size_blocklink, 1, fp);
						fread(_buffer, sizeof(char), _size_inBlock, fp);
						_buffer += _size_inBlock;
						_size_buffer -= _size_inBlock;
					}
					if(_size_buffer != 0)
					{
						cout << "size buffer" << endl;
						system("pause"); exit(0);
					}
				}
				_pLeaf ->setMemory(_i_tmp);
				_i_tmp ++;
			}
//			printf("_i_tmp :read = %d, in count: %d\n", _i_tmp, _count_tmp);

			if(_curblocklink.nextBlockAddr < 0 && _i_tmp < _count_tmp)
			{
				printf("err in nextblockaddr of readnode()");
				system("pause"); exit(0);
			}
			if(_i_tmp > _count_tmp)	break;
//			cout << "nextblockaddr: " << _curblocklink.nextBlockAddr << endl;
			fseek(fp, _curblocklink.nextBlockAddr, SEEK_SET);
			fread(&_count_block_ele, sizeof(_count_block_ele), 1, fp);
			fread(&_curblocklink, size_blocklink, 1, fp);
		}

		return _pLeaf;
	}
	else
	if(_nodetype == NODE_TYPE_INTERNAL)
	{
		mItnlNode * _pItnl = new mItnlNode;
		_pItnl ->setCount(_count_tmp);
		_pItnl ->unModify();
//		后加， 未知之前没有设地址的原因
		_pItnl ->setAddrFB(_addrfb);
		while(_i_tmp <= _count_tmp)
		{
			for(int i = 0; i < _count_block_ele; i ++)
			{
				_pItnl ->ItnlData[_i_tmp].Read_mitnldata(fp);
				_i_tmp ++;
			}
//			printf("_i_tmp read = %d, in count: %d\n", _i_tmp, _count_tmp);

			if(_curblocklink.nextBlockAddr < 0 && _i_tmp < _count_tmp)
			{
				printf("err in nextblockaddr of readnode()");
				system("pause"); exit(0);
			}
//			cout << "nextblockaddr: " << _curblocklink.nextBlockAddr << endl;
			fseek(fp, _curblocklink.nextBlockAddr, SEEK_SET);
			fread(&_count_block_ele, sizeof(_count_block_ele), 1, fp);
			fread(&_curblocklink, sizeof(_curblocklink), 1, fp);
		}
		return _pItnl;
	}
	else
	{
		printf("err in readnode of type\n");
		system("pause"); exit(0);
	}
	return NULL;
}

void WriteNode(mNode * pNode, FILE * fp, mQueue & _mqueue)
{
	if(!pNode ->getModify())		return;
	long long int _addrfb = pNode ->getAddrFB();
//	for check
//	printf("addr write : %lld\n", _addrfb);
	if(_addrfb < 0)
	{
		printf("err in setAddrFB\n");
		system("pause"); exit(0);
	}

	pNode ->unModify();

	int _size_left = BLOCKSIZE;
	//cout << "size_left1" << _size_left << endl;

	fseek(fp, _addrfb, SEEK_SET);
	int size_nodetype = sizeof(NODE_TYPE_LEAF);
	int size_count = sizeof(pNode ->getCount());
	int size_int   = sizeof(int);
	int size_lli   = sizeof(long long int);
	int size_blocklink = sizeof(mBlockLink);//-----------------16

	int _type_tmp = (int)pNode ->getType();
	int _count_tmp = pNode ->getCount();

	fwrite(&(_type_tmp),  size_nodetype, 1, fp);
	_size_left -= size_nodetype;//-----------------------------int
	fwrite(&(_count_tmp), size_count, 1, fp);
	_size_left -= size_count;//--------------------------------int

	long long int _addr_blocklink = ftell(fp);   // 可能产生问题
	fseek(fp, size_int + size_blocklink, SEEK_CUR);
	_size_left -= size_int + size_blocklink;//------------------int + long_long_int*2

	//cout << "size_left2" << _size_left << endl;
	if(pNode ->getType() == NODE_TYPE_LEAF)
	{
		mLeafNode * _pLeaf = (mLeafNode *)pNode;
		int _count = _pLeaf ->getCount();

		fwrite(&(_pLeaf ->leafLink), sizeof(_pLeaf ->leafLink), 1, fp);
		_size_left -= sizeof(_pLeaf ->leafLink);//--------------long_long_int*2

		int _i_tmp = 1;
		bool bool_WriteIn;
		int nEle_inBlock = 0;
		int first_int = 0;
		long long int _preblockaddr = -1;
		long long int _curblockaddr = _addrfb;
		mBlockLink _blocklink;
		for(; _i_tmp <= _count; _i_tmp ++)
		{
            /*
             * 传入剩余块大小， 若当前元素能够继续写入则写入并返回true， 否则不写入并返回false;
             * 如果返回false则先返写块容元素个数 及上下块的联系_  _addr_blocklink，
             * 再申请新块并继续写入： 恢复_size_left, 写入mblocklink
             * 修改上下块链接
             * 改成块内元素个数更好
             * 调整文件指针, 块内元素归零
             */
			int size_key = -1;
			int size_val = -1;
			int _tmp_i   = -1;

			bool_WriteIn = _pLeaf ->LeafData[_i_tmp].Write_mleafdata(fp, _size_left, size_key, size_val);
			if(!bool_WriteIn)   //确定不可能有单一元素超过4K， 可能产生问题
			{
				if(size_key + size_val > BLOCKSIZE - size_int*3 - size_lli*4
				   && _size_left > size_key + size_int * 3 + 1)
				{
					_pLeaf ->LeafData[_i_tmp].mData.WriteKey(fp);
					_size_left -= size_key;
					fwrite(&_tmp_i, sizeof(int), 1, fp);
					_size_left -= size_int;
					int val_len = _pLeaf ->LeafData[_i_tmp].pVal ->lenTerm[0];
					fwrite(&val_len, sizeof(int), 1, fp);
					_size_left -= size_int;

					_size_left -= size_int + 1;// for safety
					fwrite(&_size_left, sizeof(int), 1, fp);

					char * _term_buffer = _pLeaf ->LeafData[_i_tmp].pVal ->Term[0];
					int  _size_buffer = val_len;

					fwrite(_term_buffer, sizeof(char), _size_left, fp);
					_size_buffer -= _size_left;
					_term_buffer += _size_left;

//					_preblockaddr = _curblockaddr;
//					_curblockaddr = _mqueue.Pop();
					_blocklink.mBlockLink_Initial();
					_blocklink.preBlockAddr = _preblockaddr;
                    _preblockaddr = _curblockaddr;   // 新块的上一块就是当前块（首块指向-1）
                    _curblockaddr = _mqueue.Pop();    //当前块变量再调整为指向新块
                    _blocklink.nextBlockAddr = _curblockaddr;  // 上一块的下一块即为新块

					fseek(fp, _addr_blocklink, SEEK_SET);
					nEle_inBlock ++;
					fwrite(&nEle_inBlock, size_int, 1, fp);
					nEle_inBlock = 0;
					fwrite(&_blocklink, size_blocklink, 1, fp);

					fseek(fp, _curblockaddr, SEEK_SET);
					_addr_blocklink = _curblockaddr;//调整回写偏移
					fseek(fp, size_blocklink + size_int, SEEK_CUR);

					//write back blocklink

					int _block_hold = BLOCKSIZE - size_blocklink - size_int - 1;
					while(_size_buffer > _block_hold)
					{
						fwrite(_term_buffer, sizeof(char), _block_hold, fp);
						_term_buffer += _block_hold;
						_size_buffer -= _block_hold;

						_blocklink.mBlockLink_Initial();
						_blocklink.preBlockAddr = _preblockaddr;
                        _preblockaddr = _curblockaddr;   // 新块的上一块就是当前块（首块指向-1）
                        _curblockaddr = _mqueue.Pop();    //当前块变量再调整为指向新块
                        _blocklink.nextBlockAddr = _curblockaddr;  // 上一块的下一块即为新块

						fseek(fp, _addr_blocklink, SEEK_SET);
						fwrite(&_block_hold, size_int, 1, fp);
						fwrite(&_blocklink, size_blocklink, 1, fp);

						fseek(fp, _curblockaddr, SEEK_SET);
						_addr_blocklink = _curblockaddr;//调整回写偏移
						fseek(fp, size_blocklink + size_int, SEEK_CUR);
					}

					// finish the left;
					_size_buffer ++;  // write size is len + 1;
					fwrite(_term_buffer, sizeof(char), _size_buffer, fp);
//					fseek(fp, _addr_blocklink, SEEK_SET);
//					fwrite(&_size_buffer, size_int, 1, fp);
//					fwrite(&_blocklink, size_blocklink, 1, fp);
//					fseek(fp, _addr_blocklink + _size_buffer + size_int + size_blocklink, SEEK_SET);
//					_size_left = BLOCKSIZE - _size_buffer - size_int - size_blocklink;
					_size_left = -1;
					first_int = _size_buffer;
                    /*
                     * 先把块的剩余空间写入 -1， 再写入len（便于准确申请空间）， sizeleft 减去三个4（12字节， “-1”“len”“sizeleft自身”），
                     * 写入sizeleft：　到时需要分段读入　　然后申请块，　在将块链接写入之前位置
                     * 写完剩余的空间后， 调整buffer及其size
                     * 然后每多申请一块则先跳过一个整型以及快链接结构体的大小，　以备写入当前块存放的长度buffer(考虑最后一块好处理)，以及块链接
                     * 写入剩余的buffer后回写长度及块链接， 若是最后一块， 要注意整理： fp指针 & sizeleft；
                     */
				}
				else
				{
				_i_tmp --;
				_size_left = BLOCKSIZE;			//�ظ���������



				_blocklink.mBlockLink_Initial();
				_blocklink.preBlockAddr = _preblockaddr;
                _preblockaddr = _curblockaddr;   // 新块的上一块就是当前块（首块指向-1）
                _curblockaddr = _mqueue.Pop();    //当前块变量再调整为指向新块
                _blocklink.nextBlockAddr = _curblockaddr;  // 上一块的下一块即为新块
                /*
                 * 写回块内元素个数以及快链接
                 */
				fseek(fp, _addr_blocklink, SEEK_SET);
				int size_ele_inblock = sizeof(nEle_inBlock);
				fwrite(&first_int, size_ele_inblock, 1, fp);
				fwrite(&_blocklink, size_blocklink, 1, fp);

				fseek(fp, _curblockaddr, SEEK_SET);
				_addr_blocklink = _curblockaddr;//调整回写偏移
				fseek(fp, size_ele_inblock + size_blocklink, SEEK_CUR);
				_size_left -= size_ele_inblock + size_blocklink;//===========int + lli * 2

				nEle_inBlock = 0;
				}
			}
			else
			{
				nEle_inBlock ++;
				first_int = nEle_inBlock;
			}// if write_in

		}// for count
        /*
         * 最后一块的处理
         */

		_blocklink.mBlockLink_Initial();
		_blocklink.preBlockAddr = _preblockaddr;
		_blocklink.nextBlockAddr = -1;  // 上一块的下一块即为新块
		fseek(fp, _addr_blocklink, SEEK_SET);
		fwrite(&first_int, size_int, 1, fp);
		fwrite(&_blocklink, size_blocklink, 1, fp);
	}
	else
	if(pNode ->getType() == NODE_TYPE_INTERNAL)
	{
		mItnlNode * _pItnl = (mItnlNode *)pNode;
		int _count = _pItnl ->getCount();

		int _i_tmp = 1;
		bool bool_WriteIn;
		int nEle_inBlock = 0;
		long long int _preblockaddr = -1;
		long long int _curblockaddr = _addrfb;
		mBlockLink _blocklink;
		for(; _i_tmp <= _count; _i_tmp ++)
		{
            /*
             * 传入剩余块大小， 若当前元素能够继续写入则写入并返回true， 否则不写入并返回false;
             * 如果返回false则先返写块容元素个数 及上下块的联系_  _addr_blocklink，
             * 再申请新块并继续写入： 恢复_size_left, 写入mblocklink
             * 修改上下块链接
             * 改成块内元素个数更好
             * 调整文件指针, 块内元素归零
             */
			bool_WriteIn = _pItnl ->ItnlData[_i_tmp].Write_mitnldata(fp, _size_left);
			if(!bool_WriteIn)   //确定不可能有单一元素超过4K， 可能产生问题
			{
				_i_tmp --;
				_size_left = BLOCKSIZE;			//回复块内容量



				_blocklink.mBlockLink_Initial();
				_blocklink.preBlockAddr = _preblockaddr;
                _preblockaddr = _curblockaddr;   // 新块的上一块就是当前块（首块指向-1）
                _curblockaddr = _mqueue.Pop();    //当前块变量再调整为指向新块
                _blocklink.nextBlockAddr = _curblockaddr;  // 上一块的下一块即为新块
                /*
                 * 写回块内元素个数以及块链接
                 */
				fseek(fp, _addr_blocklink, SEEK_SET);
				int size_ele_inblock = sizeof(nEle_inBlock);
				fwrite(&nEle_inBlock, size_ele_inblock, 1, fp);
				fwrite(&_blocklink, size_blocklink, 1, fp);

				fseek(fp, _curblockaddr, SEEK_SET);
				_addr_blocklink = _curblockaddr;//调整回写偏移
				fseek(fp, size_ele_inblock + size_blocklink, SEEK_CUR);
				_size_left -= size_ele_inblock + size_blocklink;

				nEle_inBlock = 0;
			}
			else
			{
				nEle_inBlock ++;
			}
		}
        /*
         * 最后一块的处理
         */

		_blocklink.mBlockLink_Initial();
		_blocklink.preBlockAddr = _preblockaddr;
		_blocklink.nextBlockAddr = -1;  // 上一块的下一块即为新块
		fseek(fp, _addr_blocklink, SEEK_SET);
		int size_ele_inblock = sizeof(nEle_inBlock);
		fwrite(&nEle_inBlock, size_ele_inblock, 1, fp);
		fwrite(&_blocklink, size_blocklink, 1, fp);
	}
	else
	{
		printf("err in nodetype\n");
	}
}

void DelDisk(FILE * fp, long long int _addrfb, mQueue & _mqueue)
{
	fseek(fp, _addrfb, SEEK_SET);
//	cout << "Del" << _addrfb << endl;
	int _type_tmp;
	int _count_tmp;
	int _count_block_ele;
	mBlockLink _curblocklink;
	fread(&_type_tmp, sizeof(_type_tmp), 1, fp);
	fread(&_count_tmp, sizeof(_count_tmp), 1, fp);
	fread(&_count_block_ele, sizeof(_count_block_ele), 1, fp);
	fread(&_curblocklink, sizeof(_curblocklink), 1, fp);

	long long int _cur_addr = 0;
	int _i_tmp = 0;
	long long int BackAddr[1000] = {};
	vector<long long int> BackVec;
//	BackAddr[_i_tmp] = _addrfb;
	//  _i_tmp ++;              首块地址绝非要一起回收， 在delete实现之后首块地址在适时push的！！
	while(_curblocklink.nextBlockAddr != -1)
	{
		{
			BackVec.push_back(_curblocklink.nextBlockAddr);
			_cur_addr = _curblocklink.nextBlockAddr;
			fseek(fp, _cur_addr, SEEK_SET);
			fread(&_count_block_ele, sizeof(_count_block_ele), 1, fp);
			fread(&_curblocklink, sizeof(_curblocklink), 1, fp);
		}
//		BackAddr[_i_tmp] = _curblocklink.nextBlockAddr;
//		_i_tmp ++;
//		_cur_addr = _curblocklink.nextBlockAddr;
//		fseek(fp, _cur_addr, SEEK_SET);
//		fread(&_count_block_ele, sizeof(_count_block_ele), 1, fp);
//		fread(&_curblocklink, sizeof(_curblocklink), 1, fp);
////		for check
//		if(_i_tmp <= 0 || _i_tmp > 1000000)
//		{
//			printf("bug in _i_tmp\n");
//			system("pause"); exit(0);
//		}
	}
	_mqueue.MulPush(BackVec);
}
int myStrcmp(char _str1[], int len1, char _str2[], int len2)
{
	int minlen = len1;
	int maxlen = len2;
	if(len1 > len2)
	{
		minlen = len2;
		maxlen = len1;
	}
	int i = 0;
	for(; i < minlen; i ++)
	{
		if(_str1[i] < _str2[i]) return -1;
		if(_str1[i] > _str2[i]) return 1;
	}

	if(len1 > len2) return 1;
	if(len1 < len2) return -1;
	return 0;
}




bool Delete_KeyVal(char keyStr[], int keyLen, BPlusTree * _ptree)
{
	KeyType _key_del;
	_key_del.set_sKey(keyStr, keyLen);
	bool dRet = _ptree ->Delete(_key_del);
	return dRet;
}

bool Delete_Key_PartVal(char keyStr[], int keyLen, char partVal[], BPlusTree * _ptree)
{
	KeyType _key_del;
	_key_del.set_sKey(keyStr, keyLen);
	bool dRet = _ptree ->Delete(_key_del, partVal);
	return dRet;
}

// 以下为四个对应的删除实现， 调用了上面两个函数；
bool Delete_sID2sub(int _sID, BPlusTree * _p_sID2sub)
{
	char * sid2str = new char[5];
	*(int*)sid2str = _sID;
	sid2str[4] = '\0';
	bool bret = Delete_KeyVal(sid2str, 4, _p_sID2sub);
	delete [] sid2str;
	return bret;
}
bool Delete_s2sID(char _sub_str[], BPlusTree * _p_s2sID)
{
	bool bret = Delete_KeyVal(_sub_str, (int)strlen(_sub_str), _p_s2sID);
	return bret;
}
bool Delete_obj2sID(char _obj_str[], int _del_sID, BPlusTree * _p_obj2sID)
{
	char * sid2str = new char[5];
	*(int*)sid2str = _del_sID;
	sid2str[4] = '\0';
	bool bret = Delete_Key_PartVal(_obj_str, (int)strlen(_obj_str), sid2str, _p_obj2sID);
	delete [] sid2str;
	return bret;
}
bool Delete_objpID2sID(char _obj_str[], int _pID, int _del_sID, BPlusTree * _p_obj2sID)
{
	char * sid2str = new char[5];
	char * pid2str = new char[5];
	int obj_len = (int)strlen(_obj_str);
	*(int*)sid2str = _del_sID;
	*(int*)pid2str = _pID;
	pid2str[4] = '\0';
	sid2str[4] = '\0';
	char * _objpID_str = new char[obj_len + 5];
	memcpy(_objpID_str, _obj_str, obj_len);
	memcpy(_objpID_str + obj_len, pid2str, 5);
	bool bret = Delete_Key_PartVal(_objpID_str, obj_len + 4, sid2str, _p_obj2sID);
	delete [] sid2str;
	delete [] pid2str;
	delete [] _objpID_str;
	return bret;
}

bool DATAINPUT(FILE * ifp, char _row_str[], char _str[][600] )
{
		memset(_row_str, 0, sizeof(_row_str));
		for(int i = 0; i < 6; i ++)
		{
			memset(_str[i], 0, sizeof(_str[i]));
		}
		fgets(_row_str, 5000, ifp);
		if(feof(ifp) || (int)strlen(_row_str) == 0) 	return false;
		int _row_len = (int)strlen(_row_str);
		int _nTab = 0;
		int _ri = 0;
		for(_nTab = 0; _nTab < 5; _nTab ++)
		{
			int j = _ri;
			while(_row_str[_ri] != '	')
			{
				_str[_nTab][_ri - j] = _row_str[_ri];
				_ri ++;
			}
			_str[_nTab][_ri - j] = '\0';
			_ri ++;
		}
		//_ri ++;  // NO  another tab
		for(int i = _ri; i < _row_len; i ++)
		{
			_str[5][i - _ri] = _row_str[i];
		}
	    int len5;
	    len5 = (int)strlen(_str[5]);
	    if(_str[5][len5 -1] == '\n')    {	    	_str[5][len5 - 1] = '\0';	    }
	    if(_str[5][len5 - 2] == '\t')	{	    	_str[5][len5 - 2] = '\0';	    }
		return true;
}

void FP_Initial(FILE * & _fp)
{
	if((_fp = fopen("sixtriples_yago", "rt")) == NULL)  //sixtriples_yago
	{
		cout << "bug" << endl;
		system("pause");
		exit(0);
	}
	else
	{
		cout << "open successfully" << endl;
	}
	return;
}


void KeyType::ReadKey(FILE * fp)
{
	fread(&mLenKey, sizeof(int), 1, fp);
	if(_eletype == B_CHARARRAY)
	{
		sKey = new char[mLenKey + 1];
		fread(sKey, sizeof(char), mLenKey + 1, fp);
		if(sKey == NULL)
		{
			cout << "NULL err" << endl;
			system("pause"); exit(0);
		}

	}
	else
	{
		fread(&iKey, sizeof(int), 1, fp);
		sKey = NULL;
	}
}

void KeyType::WriteKey(FILE * fp)
{
	fwrite(&mLenKey, sizeof(int), 1, fp);
	if(_eletype == B_CHARARRAY)
	{
		fwrite(sKey, sizeof(char), mLenKey + 1, fp);
	}
	else
	{
		fwrite(&iKey, sizeof(int), 1, fp);
	}
}

void mValue::ReadVal(FILE * fp)
{
	fread(lenTerm, sizeof(int), TERM_NUMBER, fp);
	for(int i = 0; i < TERM_NUMBER; i ++)
	{
		if(Term[i] != NULL)
		{
			printf("bug term null\n");
			system("pause"); exit(0);
		}
		Term[i] = new char[ lenTerm[i] + 1 ];
		fread(Term[i], sizeof(char), lenTerm[i] + 1, fp);
	}
}
void mValue::WriteVal(FILE * fp)
{
	fwrite(lenTerm, sizeof(int), TERM_NUMBER, fp);
	for(int i = 0; i < TERM_NUMBER; i ++)
	{
		fwrite(Term[i], sizeof(char), lenTerm[i] + 1, fp);
	}
}

void mitnldata::Read_mitnldata(FILE * fp)
{
	fread(&mAddr_sonFB, sizeof(mAddr_sonFB), 1, fp);
	mKey.ReadKey(fp);
	return;
}
bool mitnldata::Write_mitnldata( FILE * fp, int & _size_left )
{
    /*
     * KeyType 需要由函数返回写入的空间大小
     */
	int size_lli = sizeof(long long int);
	int size_mKey = mKey.WriteSize();
	if(_size_left < size_lli + size_mKey)		return false;

	_size_left -= size_lli + size_mKey;

	fwrite(&mAddr_sonFB, sizeof(mAddr_sonFB), 1, fp);
	mKey.WriteKey(fp);
	return true;
}

bool mleafdata::Read_mleafdata(FILE * fp)
{
	mData.ReadKey(fp);
	if(pVal != NULL)
	{
		printf("bug - null\n");
		system("pause"); exit(0);
	}
//		pVal ->ReadVal(fp);
	int _len=0;
	fread(&_len, sizeof(int), TERM_NUMBER, fp);
	if(_len == -1)
		return false;

	pVal = new mValue;
	for(int i = 0; i < TERM_NUMBER; i ++)
	{
		if(pVal ->Term[i] != NULL)
		{
			printf("bug term null\n");
			system("pause"); exit(0);
		}
		pVal ->Term[i] = new char[ _len + 1 ];
		pVal ->lenTerm[i] = _len;
		fread(pVal ->Term[i], sizeof(char), _len + 1, fp);
	}
	return true;
}
bool mleafdata::Write_mleafdata(FILE * fp, int & _size_left, int & _key_size, int & _val_size)
{
	int size_Key = mData.WriteSize();
	int size_Val = pVal ->WriteSize();
	//cout << "kv" << size_Key + size_Val << endl;
	if(_size_left < size_Key + size_Val)
	{
		_key_size = size_Key;
		_val_size = size_Val;
		return false;
	}
	_size_left -= size_Key + size_Val;

	mData.WriteKey(fp);
	pVal ->WriteVal(fp);
	return true;
}

void BPlusTree::Initial(){
	//return;
	this ->pmLeafHead = NULL;
	this ->pmLeafTail = NULL;
	mRoot = NULL;
	mfp = NULL;
}
BPlusTree::BPlusTree(const char * const_tree_name, const char * _build_or_open)
{
	{
		_log_btree = fopen("log_btree", "w+");
	}
	this ->Initial();
	insert_count = 0;
	char _tree_name[1024];
	memcpy(_tree_name, const_tree_name, (int)strlen(const_tree_name));
	_tree_name[(int)strlen(const_tree_name)] = '\0';
	int _key_chose;
	char treetype[200] = "initial";
	strcpy(mTreeName, _tree_name);
	_key_chose = 1;
	if(_key_chose == 1)
	{
		_eletype = B_CHARARRAY;
		strcpy(treetype, "char");
		//strcat(mTreeName, treetype);
	}
	else
	if(_key_chose == 2)
	{
		_eletype = B_INTEGER;
		strcpy(treetype, "int");
		strcat(mTreeName, treetype);
	}

	pmLeafHead = pmLeafTail = NULL;
	if(!strcmp(_build_or_open, "build"))
	{
		mblockQueue.Initial();
		mRoot = new mLeafNode;
		mRoot ->setAddrFB( 0 );
		printf("the tree called: %s\n", mTreeName);
		char _treefile[1024];
		strcpy(_treefile, mTreeName);
		strcat(_treefile, ".btree");
		if((mfp = fopen(_treefile, "wb+")) == NULL)
		{
			printf("bug in create file\n");
			system("pause");
			exit(0);
		}
	}
	else
	{
		string _treefile = this ->getTreeFileName();
		_treefile += ".btree";
		while(true)
		{
			if((mfp = fopen(_treefile.c_str(), "rb+")) == NULL)
			{
				printf("err in open %s", mTreeName); cout << endl;
				system("pause"); exit(0);
			}
			else
			{
				mRoot = ReadNode(mfp, 0);
				if(mRoot == NULL){
					cout << "root of btree [" << _treefile <<  "] is NULL" << endl;
					exit(0);
				}
				break;
			}
		}
		char _queuefile[1024];
		strcpy(_queuefile, mTreeName);
		strcat(_queuefile, "_queue.btree");
		mblockQueue.ReadQueue(_queuefile);
	}

}
BPlusTree::~BPlusTree()
{
	this ->ClearTree();
}
string BPlusTree::getTreeFileName(){
	string _tree_name = this ->mTreeName;
	return _tree_name;
}
void BPlusTree::log(const char* _log)const{
	bool debug_mode = true;
	if(!debug_mode) {
		return;
	}
	fputs(_log, _log_btree);
	fflush(_log_btree);
}
void BPlusTree::forcheck()
{
	queue<mNode *> pQueue[100];
		int nFloor = 0;
		mNode * pRoot = this ->getRoot();
		mNode * pNode;
		pQueue[nFloor].push(pRoot);
		int fThreshold;
		int _i_ord = 0;
		while(!pQueue[nFloor].empty() && nFloor < fThreshold)
		{
			pNode = pQueue[nFloor].front();
			pQueue[nFloor].pop();
			cout << _i_ord ++ << endl;

			if(pNode ->getType()  == NODE_TYPE_INTERNAL)
			{
				for(int i = 1; i <= pNode ->getCount(); i ++)
				{
					if(pNode ->isInMemory(i))
					{
						if(pNode != ((pNode ->getPointer(i)) ->getFather()))
						{
							cout << " bug " << _ii;
							cout << " bug key :   ";
							pNode ->getKey(i).PrintKey();
							cout << endl;
							system("pause"); exit(0);
						}
					}
				}
			}
			if(pQueue[nFloor].empty())
			{
				nFloor ++;
				printf("\n\nthe %d floor:\n\n", nFloor + 1);
			}
		}
}