Balanced Binary Tree

**	(c) COPYRIGHT MIT 1995.
**	Please first read the full copyright statement in the file COPYRIGH.
Tree creation, traversal and freeing. User-supplied comparison routine.

This module is implemented by HTBTree.c, and it is a part of the W3C Sample Code Library.

#ifndef HTBTTEE_H
#define HTBTREE_H

#include "HTArray.h"
typedef struct _HTBTree HTBTree;

typedef struct _HTBTree_element HTBTElement;

Create a Binary Tree

This function creates a new binary tree and uses the comparison function when building the tree.
extern HTBTree * HTBTree_new (HTComparer * comp);

Free storage of the tree but not of the objects

extern void HTBTree_free (HTBTree * tree);

Free storage of the tree and of the objects

extern void HTBTreeAndObject_free (HTBTree * tree);

Add an object to a binary tree

extern void HTBTree_add (HTBTree* tree, void * object);

Return an Object

extern void * HTBTree_object (HTBTElement * element);

Find next element in depth-first order

On entry,

If element is NULL then start with leftmost element. if not NULL then give next object to the right. The function returns a pointer to element or NULL if none left.
extern HTBTElement * HTBTree_next (HTBTree * tree, HTBTElement * element);

@(#) $Id: HTBTree.html,v 2.19 1998/05/14 02:10:16 frystyk Exp $