/* -*- tab-width: 4 -*-
*
* Electric(tm) VLSI Design System
*
* File: BTree.java
*
* Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
*
* Electric(tm) is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* Electric(tm) 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 Electric(tm); see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, Mass 02111-1307, USA.
*/
package com.sun.electric.database.geometry.btree.unboxed;
import java.io.*;
/**
* An associative operation on unboxed values.
*
* http://en.wikipedia.org/wiki/Monoid
* http://en.wikipedia.org/wiki/Semigroup
*/
public interface AssociativeOperation<S extends Serializable>
extends Unboxed<S> /* and UnboxedFunction<Pair<S,S>,S> ... */ {
/**
* Compute (buf1,ofs1)*(buf2,ofs2) and write it to (buf_dest,ofs_dest).
* MUST support the case where (buf1,ofs1)==(buf_dest,ofs_dest)
* or (buf2,ofs2)==(buf_dest,ofs_dest) or ther is some overlap.
*
* MUST BE ABLE TO DEAL WITH THE CASE WHERE DESTINATION BUFFER
* OVERLAPS ONE OF SOURCE BUFFERS!!!
*/
public void multiply(byte[] buf1, int ofs1,
byte[] buf2, int ofs2,
byte[] buf_dest, int ofs_dest);
}