| /* |
| * Copyright (c) 1997, 2006, 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 sun.security.util; |
| |
| import java.util.Comparator; |
| |
| /** |
| * Compare two byte arrays in lexicographical order. |
| * |
| * @author D. N. Hoover |
| */ |
| public class ByteArrayLexOrder implements Comparator<byte[]> { |
| |
| /** |
| * Perform lexicographical comparison of two byte arrays, |
| * regarding each byte as unsigned. That is, compare array entries |
| * in order until they differ--the array with the smaller entry |
| * is "smaller". If array entries are |
| * equal till one array ends, then the longer array is "bigger". |
| * |
| * @param bytes1 first byte array to compare. |
| * @param bytes2 second byte array to compare. |
| * @return negative number if bytes1 < bytes2, 0 if bytes1 == bytes2, |
| * positive number if bytes1 > bytes2. |
| * |
| * @exception <code>ClassCastException</code> |
| * if either argument is not a byte array. |
| */ |
| public final int compare( byte[] bytes1, byte[] bytes2) { |
| int diff; |
| for (int i = 0; i < bytes1.length && i < bytes2.length; i++) { |
| diff = (bytes1[i] & 0xFF) - (bytes2[i] & 0xFF); |
| if (diff != 0) { |
| return diff; |
| } |
| } |
| // if array entries are equal till the first ends, then the |
| // longer is "bigger" |
| return bytes1.length - bytes2.length; |
| } |
| |
| |
| } |