001/**
002 *
003 * Copyright © 2014-2019 Florian Schmaus
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.jivesoftware.smack.util;
018
019public class ByteUtils {
020
021    /**
022     * Concatenate two byte arrays.
023     *
024     * @param arrayOne the first input array.
025     * @param arrayTwo the second input array
026     * @return the concatenation of the first and second input array.
027     *
028     */
029    public static byte[] concat(byte[] arrayOne, byte[] arrayTwo) {
030        int combinedLength = arrayOne.length + arrayTwo.length;
031        byte[] res = new byte[combinedLength];
032        System.arraycopy(arrayOne, 0, res, 0, arrayOne.length);
033        System.arraycopy(arrayTwo, 0, res, arrayOne.length, arrayTwo.length);
034        return res;
035    }
036
037}