78 lines
2.1 KiB
C++
78 lines
2.1 KiB
C++
#pragma once
|
|
// http://web.mit.edu/~emin/www/source_code/cpp_trees/index.html
|
|
|
|
class RedBlackTreeNode
|
|
{
|
|
public:
|
|
typedef int key_t;
|
|
typedef void *val_t;
|
|
friend class RedBlackTree;
|
|
public:
|
|
RedBlackTreeNode();
|
|
RedBlackTreeNode(key_t, val_t);
|
|
val_t GetEntry() const;
|
|
~RedBlackTreeNode();
|
|
protected:
|
|
val_t storedEntry;
|
|
key_t key;
|
|
int red; /* if red=0 then the node is black */
|
|
RedBlackTreeNode *left;
|
|
RedBlackTreeNode *right;
|
|
RedBlackTreeNode *parent;
|
|
};
|
|
class RedBlackTree;
|
|
|
|
class RedBlackTreeIterator
|
|
{
|
|
public:
|
|
friend RedBlackTree;
|
|
typedef int key_t;
|
|
typedef void *val_t;
|
|
RedBlackTreeIterator() : node(0), tree(0) {}
|
|
RedBlackTreeIterator(RedBlackTreeNode *_node, RedBlackTree *_tree) : node(_node), tree(_tree) {}
|
|
void next();
|
|
bool get(val_t *val);
|
|
private:
|
|
RedBlackTreeNode *node;
|
|
RedBlackTree *tree;
|
|
};
|
|
|
|
class RedBlackTree
|
|
{
|
|
public:
|
|
typedef int key_t;
|
|
typedef void *val_t;
|
|
public:
|
|
RedBlackTree();
|
|
~RedBlackTree();
|
|
|
|
RedBlackTreeIterator end();
|
|
RedBlackTreeIterator Insert(key_t, val_t);
|
|
RedBlackTreeIterator Search(key_t key);
|
|
RedBlackTreeIterator begin();
|
|
// semi-public:
|
|
void Delete(key_t key);
|
|
val_t DeleteNode(RedBlackTreeNode *);
|
|
RedBlackTreeNode *GetPredecessorOf(RedBlackTreeNode *) const;
|
|
RedBlackTreeNode *GetSuccessorOf(RedBlackTreeNode *) const;
|
|
size_t size() const;
|
|
|
|
//TemplateStack<RedBlackTreeNode *> * Enumerate(int low, int high) ;
|
|
protected:
|
|
/* A sentinel is used for root and for nil. These sentinels are */
|
|
/* created when RedBlackTreeCreate is caled. root->left should always */
|
|
/* point to the node which is the root of the tree. nil points to a */
|
|
/* node which should always be black but has aribtrary children and */
|
|
/* parent and no key or info. The point of using these sentinels is so */
|
|
/* that the root and nil nodes do not require special cases in the code */
|
|
RedBlackTreeNode *root;
|
|
RedBlackTreeNode *nil;
|
|
void LeftRotate(RedBlackTreeNode *);
|
|
void RightRotate(RedBlackTreeNode *);
|
|
void TreeInsertHelp(RedBlackTreeNode *);
|
|
void TreePrintHelper(RedBlackTreeNode *) const;
|
|
void FixUpMaxHigh(RedBlackTreeNode *);
|
|
void DeleteFixUp(RedBlackTreeNode *);
|
|
size_t numElements;
|
|
};
|