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/*************************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: stgavl.hxx,v $
*
* $Revision: 1.2 $
*
* last change: $Author: rt $ $Date: 2005-09-08 07:40:14 $
*
* The Contents of this file are made available subject to
* the terms of GNU Lesser General Public License Version 2.1.
*
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2005 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
************************************************************************/
#ifndef _STGAVL_HXX
#define _STGAVL_HXX
#ifndef _TOOLS_SOLAR_H
#include <tools/solar.h>
#endif
// This class must be overloaded to define real, living nodes.
// Especially, the compare function must be implemented.
class StgAvlNode
{
friend class StgAvlIterator;
private:
short Locate( StgAvlNode*, StgAvlNode**, StgAvlNode**, StgAvlNode** );
short Adjust( StgAvlNode**, StgAvlNode* );
StgAvlNode* RotLL();
StgAvlNode* RotLR();
StgAvlNode* RotRR();
StgAvlNode* RotRL();
void Enum( short& );
static StgAvlNode* Rem( StgAvlNode**, StgAvlNode*, BOOL );
protected:
short nId; // iterator ID
short nBalance; // indicates tree balance
StgAvlNode* pLeft, *pRight; // leaves
StgAvlNode();
public:
virtual ~StgAvlNode();
StgAvlNode* Find( StgAvlNode* );
static BOOL Insert( StgAvlNode**, StgAvlNode* );
static BOOL Remove( StgAvlNode**, StgAvlNode*, BOOL bDel = TRUE );
static BOOL Move( StgAvlNode**, StgAvlNode**, StgAvlNode* );
virtual short Compare( const StgAvlNode* ) const = 0;
};
// The iterator class provides single stepping through an AVL tree.
class StgAvlIterator {
StgAvlNode* pRoot; // root entry (parent)
short nCount; // tree size
short nCur; // current element
StgAvlNode* Find( short );
public:
StgAvlIterator( StgAvlNode* );
StgAvlNode* First();
StgAvlNode* Last();
StgAvlNode* Next();
StgAvlNode* Prev();
};
#endif
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