content: /*
   * Copyright (c) 1996, 1999, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code 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.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Oracle in the LICENSE file that accompanied this code.
   *
   * This code 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 in the LICENSE file that
   * accompanied this code).
   *
   * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  package java.util.zip;
  
  /**
   * An interface representing a data checksum.
   *
   * @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();
  }
  