/*
* @(#)Checksum.java 1.20 06/10/10
*
* Copyright 1990-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* 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 version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*
*/
package java.util.zip;
/**
* An interface representing a data checksum.
*
* @version 1.13, 02/02/00
* @author David Connelly
*/
public
interface Checksum {
/**
* Updates the current checksum with the specified byte.
*
* @param b the byte to update the checksum with
*/
public void update(int b);
/**
* Updates the current checksum with the specified array of bytes.
* @param b the byte array to update the checksum with
* @param off the start offset of the data
* @param len the number of bytes to use for the update
*/
public void update(byte[] b, int off, int len);
/**
* Returns the current checksum value.
* @return the current checksum value
*/
public long getValue();
/**
* Resets the checksum to its initial value.
*/
public void reset();
}