org.tukaani.xz.check.CRC32 Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of org.tukaani.xz Show documentation

There is a newer version: 0.3

/*
 * CRC32
 *
 * Author: Lasse Collin 
 *
 * This file has been put into the public domain.
 * You can do whatever you want with this file.
 */

package org.tukaani.xz.check;

public class CRC32 extends Check {
    private final java.util.zip.CRC32 state = new java.util.zip.CRC32();

    public CRC32() {
        size = 4;
        name = "CRC32";
    }

    public void update(byte[] buf, int off, int len) {
        state.update(buf, off, len);
    }

    public byte[] finish() {
        long value = state.getValue();
        byte[] buf = new byte[] { (byte)(value),
                                  (byte)(value >>> 8),
                                  (byte)(value >>> 16),
                                  (byte)(value >>> 24) };
        state.reset();
        return buf;
    }
}