rbtree.h

Go to the documentation of this file.

/* $Id: rbtree.h 3553 2011-05-05 06:14:19Z nanang $ */
/* 
 * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
 * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
 */
#ifndef __PJ_RBTREE_H__
#define __PJ_RBTREE_H__

#include <pj/types.h>

PJ_BEGIN_DECL

typedef enum pj_rbcolor_t
{
    PJ_RBCOLOR_BLACK,
    PJ_RBCOLOR_RED
} pj_rbcolor_t;

typedef struct pj_rbtree_node 
{
    struct pj_rbtree_node *parent, *left, *right;

    const void *key;

    void *user_data;

    pj_rbcolor_t color;

} pj_rbtree_node;


typedef int pj_rbtree_comp(const void *key1, const void *key2);


typedef struct pj_rbtree
{
    pj_rbtree_node null_node;   
    pj_rbtree_node *null;       
    pj_rbtree_node *root;       
    unsigned size;              
    pj_rbtree_comp *comp;       
} pj_rbtree;


#define PJ_RBTREE_NODE_SIZE         (sizeof(pj_rbtree_node))


#define PJ_RBTREE_SIZE              (sizeof(pj_rbtree))


PJ_DECL(void) pj_rbtree_init( pj_rbtree *tree, pj_rbtree_comp *comp);

PJ_DECL(pj_rbtree_node*) pj_rbtree_first( pj_rbtree *tree );

PJ_DECL(pj_rbtree_node*) pj_rbtree_last( pj_rbtree *tree );

PJ_DECL(pj_rbtree_node*) pj_rbtree_next( pj_rbtree *tree, 
                                         pj_rbtree_node *node );

PJ_DECL(pj_rbtree_node*) pj_rbtree_prev( pj_rbtree *tree, 
                                         pj_rbtree_node *node );

PJ_DECL(int) pj_rbtree_insert( pj_rbtree *tree, 
                               pj_rbtree_node *node );

PJ_DECL(pj_rbtree_node*) pj_rbtree_find( pj_rbtree *tree,
                                         const void *key );

PJ_DECL(pj_rbtree_node*) pj_rbtree_erase( pj_rbtree *tree,
                                          pj_rbtree_node *node );

PJ_DECL(unsigned) pj_rbtree_max_height( pj_rbtree *tree,
                                        pj_rbtree_node *node );

PJ_DECL(unsigned) pj_rbtree_min_height( pj_rbtree *tree,
                                        pj_rbtree_node *node );


PJ_END_DECL

#endif  /* __PJ_RBTREE_H__ */