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/*
* zAVLTree.h: Header file for zAVLTrees.
* Copyright (C) 1998,2001 Michael H. Buselli
* This is version 0.1.3 (alpha).
* Generated from $Id: xAVLTree.h.sh,v 1.5 2001/06/07 06:58:28 cosine Exp $
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* The author of this library can be reached at the following address:
* Michael H. Buselli
* 30051 N. Waukegan Rd. Apt. 103
* Lake Bluff, IL 60044-5412
*
* Or you can send email to <cosine@cosine.org>.
* The official web page for this product is:
* http://www.cosine.org/project/AVLTree/
*/
#ifndef _ZAVLTREE_H_
#define _ZAVLTREE_H_
/* typedef the keytype */
typedef const char * zAVLKey;
/* Comparison function for strings is strcmp(). */
#define zAVLKey_cmp(tree, a, b) (strcmp((a), (b)))
typedef struct _zAVLNode {
zAVLKey key;
long depth;
void *item;
struct _zAVLNode *parent;
struct _zAVLNode *left;
struct _zAVLNode *right;
} zAVLNode;
typedef struct {
zAVLNode *top;
long count;
zAVLKey (*getkey)(const void *item);
} zAVLTree;
typedef struct {
const zAVLTree *avltree;
const zAVLNode *curnode;
} zAVLCursor;
extern zAVLTree *zAVLAllocTree (zAVLKey (*getkey)(void const *item));
extern void zAVLFreeTree (zAVLTree *avltree, void (freeitem)(void *item));
extern int zAVLInsert (zAVLTree *avltree, void *item);
extern void *zAVLSearch (zAVLTree const *avltree, zAVLKey key);
extern int zAVLDelete (zAVLTree *avltree, zAVLKey key);
extern void *zAVLFirst (zAVLCursor *avlcursor, zAVLTree const *avltree);
extern void *zAVLNext (zAVLCursor *avlcursor);
#endif
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