/*************************************************************************
 *
 *  $RCSfile: ring.cxx,v $
 *
 *  $Revision: 1.1.1.1 $
 *
 *  last change: $Author: hr $ $Date: 2000-09-19 00:08:16 $
 *
 *  The Contents of this file are made available subject to the terms of
 *  either of the following licenses
 *
 *         - GNU Lesser General Public License Version 2.1
 *         - Sun Industry Standards Source License Version 1.1
 *
 *  Sun Microsystems Inc., October, 2000
 *
 *  GNU Lesser General Public License Version 2.1
 *  =============================================
 *  Copyright 2000 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
 *
 *
 *  Sun Industry Standards Source License Version 1.1
 *  =================================================
 *  The contents of this file are subject to the Sun Industry Standards
 *  Source License Version 1.1 (the "License"); You may not use this file
 *  except in compliance with the License. You may obtain a copy of the
 *  License at http://www.openoffice.org/license.html.
 *
 *  Software provided under this License is provided on an "AS IS" basis,
 *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
 *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
 *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
 *  See the License for the specific provisions governing your rights and
 *  obligations concerning the Software.
 *
 *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
 *
 *  Copyright: 2000 by Sun Microsystems, Inc.
 *
 *  All Rights Reserved.
 *
 *  Contributor(s): _______________________________________
 *
 *
 ************************************************************************/

#ifdef PRECOMPILED
#include "core_pch.hxx"
#endif

#pragma hdrstop

#include "ring.hxx"


/*************************************************************************
|*
|*    Ring::Ring()
|*
|*    Ersterstellung    VB  02.07.91
|*    Letzte Aenderung  JP 10.10.97
|*
*************************************************************************/

Ring::Ring( Ring *pObj )
{
    if( !pObj )
        pNext = this, pPrev = this;
    else
    {
        pNext = pObj;
        pPrev = pObj->pPrev;
        pObj->pPrev = this;
        pPrev->pNext = this;
    }
}

/*************************************************************************
|*
|*    Ring::~Ring()
|*
|*    Ersterstellung    VB  02.07.91
|*    Letzte Aenderung  JP 10.10.97
|*
*************************************************************************/

Ring::~Ring()
{
    pNext->pPrev = pPrev;
    pPrev->pNext = pNext;
}

/*************************************************************************
|*
|*    Ring::MoveTo
|*
|*    Ersterstellung    VB 4.3.91
|*    Letzte Aenderung  JP 10.10.97
|*
*************************************************************************/

void Ring::MoveTo(Ring *pDestRing)
{
    // loeschen aus dem alten
    pNext->pPrev = pPrev;
    pPrev->pNext = pNext;

    // im neuen einfuegen
    if( pDestRing )
    {
        pNext = pDestRing;
        pPrev = pDestRing->pPrev;
        pDestRing->pPrev = this;
        pPrev->pNext = this;
    }
    else
        pNext = pPrev = this;

}

void Ring::MoveRingTo(Ring *pDestRing)
{
    // den gesamten Ring in den DestRing einfuegen
    Ring* pMyPrev = pPrev;
    Ring* pDestPrev = pDestRing->pPrev;

    pMyPrev->pNext = pDestRing;
    pDestPrev->pNext = this;
    pDestRing->pPrev = pMyPrev;
    pPrev = pDestPrev;
}