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/*
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* Copyright (c) 1996, 1999, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.util.zip;
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/**
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* An interface representing a data checksum.
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*
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* @author David Connelly
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*/
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public
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interface Checksum {
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/**
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* Updates the current checksum with the specified byte.
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*
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* @param b the byte to update the checksum with
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*/
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public void update(int b);
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/**
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* Updates the current checksum with the specified array of bytes.
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* @param b the byte array to update the checksum with
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* @param off the start offset of the data
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* @param len the number of bytes to use for the update
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*/
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public void update(byte[] b, int off, int len);
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/**
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* Returns the current checksum value.
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* @return the current checksum value
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*/
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public long getValue();
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/**
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* Resets the checksum to its initial value.
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*/
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public void reset();
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}
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