/*

 * Copyright (c) 2000, 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.

 */

import java.util.zip.CRC32;

/**

 * Checksum provides methods for calculating a CRC32 value for a

 * transitions table.

 *

 * @since 1.4

 */

public class Checksum extends CRC32

{

    /**

     * Updates the CRC32 value from each byte of the given int

     * value. The bytes are used in the big endian order.

     * @param val the int value

     */

    public void update(int val) {

        byte[] b = new byte[4];

        b[0] = (byte)((val >>> 24) & 0xff);

        b[1] = (byte)((val >>> 16) & 0xff);

        b[2] = (byte)((val >>> 8) & 0xff);

        b[3] = (byte)(val & 0xff);

        update(b);

    }

    /**

     * Updates the CRC32 value from each byte of the given long

     * value. The bytes are used in the big endian order.

     * @param val the long value

     */

    void update(long val) {

        byte[] b = new byte[8];

        b[0] = (byte)((val >>> 56) & 0xff);

        b[1] = (byte)((val >>> 48) & 0xff);

        b[2] = (byte)((val >>> 40) & 0xff);

        b[3] = (byte)((val >>> 32) & 0xff);

        b[4] = (byte)((val >>> 24) & 0xff);

        b[5] = (byte)((val >>> 16) & 0xff);

        b[6] = (byte)((val >>> 8) & 0xff);

        b[7] = (byte)(val & 0xff);

        update(b);

    }

}