Util.java

/*
 * *
 *  Copyright (C) 2014 Open Whisper Systems
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program. If not, see <http://www.gnu.org/licenses/>.
 * /
 */
package org.anhonesteffort.flock.util;

public class Util {

  public static byte[] combine(byte[] one, byte[] two) {
    byte[] combined = new byte[one.length + two.length];
    System.arraycopy(one, 0, combined, 0, one.length);
    System.arraycopy(two, 0, combined, one.length, two.length);

    return combined;
  }

  public static byte[] combine(byte[] one, byte[] two, byte[] three) {
    byte[] combined = new byte[one.length + two.length + three.length];
    System.arraycopy(one, 0, combined, 0, one.length);
    System.arraycopy(two, 0, combined, one.length, two.length);
    System.arraycopy(three, 0, combined, one.length + two.length, three.length);

    return combined;
  }

  public static byte[] combine(byte[] one, byte[] two, byte[] three, byte[] four) {
    byte[] combined = new byte[one.length + two.length + three.length + four.length];
    System.arraycopy(one, 0, combined, 0, one.length);
    System.arraycopy(two, 0, combined, one.length, two.length);
    System.arraycopy(three, 0, combined, one.length + two.length, three.length);
    System.arraycopy(four, 0, combined, one.length + two.length + three.length, four.length);

    return combined;

  }

}