| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (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.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package java.util.zip; |
| |
| /** |
| * Holds information about a checksum which was computed with the methods |
| * implementing a checksum algorithm. |
| */ |
| public interface Checksum { |
| |
| /** |
| * Returns the current calculated checksum value. |
| * |
| * @return the checksum. |
| */ |
| public long getValue(); |
| |
| /** |
| * Resets the checksum value applied before beginning calculations on a new |
| * stream of data. |
| */ |
| public void reset(); |
| |
| /** |
| * Updates the checksum with the given bytes. |
| * |
| * @param buf |
| * the byte array from which to read the bytes. |
| * @param off |
| * the initial position in {@code buf} to read the bytes from. |
| * @param nbytes |
| * the number of bytes to read from {@code buf}. |
| */ |
| public void update(byte[] buf, int off, int nbytes); |
| |
| /** |
| * Updates the checksum value with the given byte. |
| * |
| * @param val |
| * the byte to update the checksum with. |
| */ |
| public void update(int val); |
| } |