1/* 2 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24/* 25 * utility class 26 */ 27 28public class TestUtilities { 29 public static boolean equalsBlock(byte[] b1, byte[] b2, int len) { 30 for (int i = 0; i < len; i++) { 31 if (b1[i] != b2[i]) { 32 System.err.println("b1[" + i + "] : " + b1[i] 33 + " b2[" + i + "] : " + b2[i]); 34 return false; 35 } 36 } 37 return true; 38 } 39 40 public static boolean equals(byte[] b1, byte[] b2) { 41 if (b2.length != b1.length) { 42 System.err.println("b1.length = " + b1.length 43 + " b2.length = " + b2.length ); 44 return false; 45 } 46 return equalsBlock(b1, b2, b1.length); 47 } 48 49 /** 50 * Verify b1's partial part is same as b2. compares b1 and b2 by chopping up 51 * b1 into blocks of b1BKSize and b2 into blocks of b2BKSize, and then 52 * compare the first b2BKSize bytes of each block, return true if they equal 53 * , otherwise return false. 54 * @param b1 byte array to be compared. 55 * @param b2 saved byte array. 56 * @param b1BKSize b1's block size. 57 * @param b2BKSize b2's block size. 58 * @return true is same. false otherwise. 59 */ 60 public static boolean equalsBlockPartial(byte[] b1, byte[] b2, int b1BKSize, 61 int b2BKSize) { 62 int numOfBlock = b1.length / b1BKSize; 63 for (int b = 0; b < numOfBlock; b++) { 64 for (int i = 0; i < b2BKSize; i++) { 65 int j1 = b * b1BKSize + i; 66 int j2 = b * b2BKSize + i; 67 if (b1[j1] != b2[j2]) { 68 System.err.println("Compare failed at b1[" + j1 + "]:" + 69 b1[j1] + " b2[" + j2 + "]:" + b2[j2]); 70 return false; 71 } 72 } 73 } 74 return true; 75 } 76 77 /** 78 * Generate a byte block by given length. The content of byte block 79 * is determined by the index. 80 * @param length length of byte array 81 * @return a byte array 82 */ 83 public static byte[] generateBytes(int length) { 84 byte[] bytes = new byte[length]; 85 for (int i = 0; i < length; i++) { 86 bytes[i] = (byte) (i & 0xff); 87 } 88 return bytes; 89 } 90} 91