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/** BEGIN COPYRIGHT BLOCK
* 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; version 2 of the License.
*
* 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.
*
* In addition, as a special exception, Red Hat, Inc. gives You the additional
* right to link the code of this Program with code not covered under the GNU
* General Public License ("Non-GPL Code") and to distribute linked combinations
* including the two, subject to the limitations in this paragraph. Non-GPL Code
* permitted under this exception must only link to the code of this Program
* through those well defined interfaces identified in the file named EXCEPTION
* found in the source code files (the "Approved Interfaces"). The files of
* Non-GPL Code may instantiate templates or use macros or inline functions from
* the Approved Interfaces without causing the resulting work to be covered by
* the GNU General Public License. Only Red Hat, Inc. may make changes or
* additions to the list of Approved Interfaces. You must obey the GNU General
* Public License in all respects for all of the Program code and other code used
* in conjunction with the Program except the Non-GPL Code covered by this
* exception. If you modify this file, you may extend this exception to your
* version of the file, but you are not obligated to do so. If you do not wish to
* provide this exception without modification, you must delete this exception
* statement from your version and license this file solely under the GPL without
* exception.
*
*
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
/* avl.h - avl tree definitions */
/*
* Copyright (c) 1993 Regents of the University of Michigan.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of Michigan at Ann Arbor. The name of the University
* may not be used to endorse or promote products derived from this
* software without specific prior written permission. This software
* is provided ``as is'' without express or implied warranty.
*/
#ifndef _AVL
#define _AVL
/*
* this structure represents a generic avl tree node.
*/
typedef struct avlnode {
caddr_t avl_data;
signed char avl_bf;
struct avlnode *avl_left;
struct avlnode *avl_right;
} Avlnode;
#define NULLAVL ((Avlnode *) NULL)
/* balance factor values */
#define LH -1
#define EH 0
#define RH 1
/* avl routines */
#define avl_getone(x) (x == 0 ? 0 : (x)->avl_data)
#define avl_onenode(x) (x == 0 || ((x)->avl_left == 0 && (x)->avl_right == 0))
extern int avl_insert();
extern caddr_t avl_delete();
extern caddr_t avl_find();
extern caddr_t avl_getfirst();
extern caddr_t avl_getnext();
extern int avl_dup_error();
extern int avl_apply();
extern int avl_free();
/* apply traversal types */
#define AVL_PREORDER 1
#define AVL_INORDER 2
#define AVL_POSTORDER 3
/* what apply returns if it ran out of nodes */
#define AVL_NOMORE -6
#ifndef _IFP
#define _IFP
typedef int (*IFP)();
#endif
caddr_t avl_find_lin( Avlnode *root, caddr_t data, IFP fcmp );
#endif /* _AVL */
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