54 lines
1.4 KiB
C++
54 lines
1.4 KiB
C++
/*=============================================================================
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# Filename: LeafNode.h
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# Author: syzz
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# Mail: 1181955272@qq.com
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# Last Modified: 2015-04-26 16:39
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# Description: the leaf-node of a B+ tree
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=============================================================================*/
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#ifndef _LEAF_NODE_H
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#define _LEAF_NODE_H
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#include "../util/Util.h"
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#include "../bstr/TBstr.h"
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#include "Node.h"
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class LeafNode: public Node
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{
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protected:
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Node* prev; //LeafNode
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Node* next;
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TBstr* values;
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void AllocValues();
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//void FreeValues();
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public:
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LeafNode();
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LeafNode(bool isVirtual);
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//LeafNode(Storage* TSM);
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void Virtual();
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void Normal();
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Node* getPrev() const;
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Node* getNext() const;
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const TBstr* getValue(int _index) const;
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bool setValue(const TBstr* _value, int _index, bool ifcopy = false);
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bool addValue(const TBstr* _value, int _index, bool ifcopy = false);
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bool subValue(int _index, bool ifdel = false);
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void setPrev(Node* _prev);
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void setNext(Node* _next);
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unsigned getSize() const;
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Node* split(Node* _father, int _index);
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Node* coalesce(Node* _father, int _index);
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void release();
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~LeafNode();
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void print(std::string s); //DEBUG
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/*non-sense virtual function
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Node* getChild(int _index) const;
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bool addChild(Node* _child, int _index);
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bool subChild(int _index);
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*/
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};
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//BETTER: prev isn't a must, and reverse-range can be achieved using recursive-next
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#endif
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