1 /* 2 * Copyright (c) 2014, 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 * Base class for Checksum tests 26 */ 27 import java.nio.ByteBuffer; 28 import java.nio.ByteOrder; 29 import java.nio.charset.StandardCharsets; 30 import java.util.zip.Checksum; 31 32 public class ChecksumBase { 33 34 private static final byte[] BYTES_123456789 = "123456789".getBytes(StandardCharsets.US_ASCII); 35 testAll(Checksum checksum, long expected)36 public static void testAll(Checksum checksum, long expected) { 37 testBytes(checksum, expected); 38 testByteArray(checksum, expected); 39 testWrappedByteBuffer(checksum, expected); 40 testReadonlyByteBuffer(checksum, expected); 41 testDirectByteBuffer(checksum, expected); 42 testByteArrayOffset(checksum, expected); 43 testDirectByteBufferOffset(checksum, expected); 44 testLittleEndianDirectByteBufferOffset(checksum, expected); 45 testWrappedByteBufferOffset(checksum, expected); 46 testLittleEndianWrappedByteBufferOffset(checksum, expected); 47 testReadonlyByteBufferOffset(checksum, expected); 48 testLittleEndianReadonlyByteBufferOffset(checksum, expected); 49 } 50 testBytes(Checksum checksum, long expected)51 private static void testBytes(Checksum checksum, long expected) { 52 checksum.reset(); 53 for (byte bits : BYTES_123456789) { 54 checksum.update(bits); 55 } 56 checkChecksum(checksum, expected); 57 } 58 testByteArray(Checksum checksum, long expected)59 private static void testByteArray(Checksum checksum, long expected) { 60 checksum.reset(); 61 checksum.update(BYTES_123456789); 62 checkChecksum(checksum, expected); 63 } 64 testWrappedByteBuffer(Checksum checksum, long expected)65 private static void testWrappedByteBuffer(Checksum checksum, long expected) { 66 checksum.reset(); 67 ByteBuffer bb = ByteBuffer.wrap(BYTES_123456789); 68 checksum.update(bb); 69 checkChecksum(checksum, expected); 70 } 71 testReadonlyByteBuffer(Checksum checksum, long expected)72 private static void testReadonlyByteBuffer(Checksum checksum, long expected) { 73 checksum.reset(); 74 ByteBuffer bb = ByteBuffer.wrap(BYTES_123456789).asReadOnlyBuffer(); 75 checksum.update(bb); 76 checkChecksum(checksum, expected); 77 } 78 testDirectByteBuffer(Checksum checksum, long expected)79 private static void testDirectByteBuffer(Checksum checksum, long expected) { 80 checksum.reset(); 81 ByteBuffer bb = ByteBuffer.allocateDirect(BYTES_123456789.length); 82 bb.put(BYTES_123456789); 83 bb.rewind(); 84 checksum.update(bb); 85 checkChecksum(checksum, expected); 86 } 87 checkChecksum(Checksum checksum, long expected)88 private static void checkChecksum(Checksum checksum, long expected) { 89 if (checksum.getValue() != expected) { 90 throw new RuntimeException("Calculated checksum result was invalid." 91 + " Expected " + Long.toHexString(expected) 92 + ", but got " + Long.toHexString(checksum.getValue()) + "."); 93 } 94 } 95 testByteArrayOffset(Checksum checksum, long expected)96 private static void testByteArrayOffset(Checksum checksum, long expected) { 97 byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64]; 98 for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) { 99 checksum.reset(); 100 System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length); 101 checksum.update(unaligned_bytes_123456789, i, BYTES_123456789.length); 102 checkChecksumOffset(checksum, expected, i); 103 } 104 } 105 testDirectByteBufferOffset(Checksum checksum, long expected)106 private static void testDirectByteBufferOffset(Checksum checksum, long expected) { 107 byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64]; 108 for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) { 109 checksum.reset(); 110 ByteBuffer bb = ByteBuffer.allocateDirect(unaligned_bytes_123456789.length); 111 System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length); 112 bb.put(unaligned_bytes_123456789); 113 bb.position(i); 114 bb.limit(i + BYTES_123456789.length); 115 checksum.update(bb); 116 checkChecksumOffset(checksum, expected, i); 117 } 118 } 119 testLittleEndianDirectByteBufferOffset(Checksum checksum, long expected)120 private static void testLittleEndianDirectByteBufferOffset(Checksum checksum, long expected) { 121 byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64]; 122 for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) { 123 checksum.reset(); 124 ByteBuffer bb = ByteBuffer.allocateDirect(unaligned_bytes_123456789.length); 125 bb.order(ByteOrder.LITTLE_ENDIAN); 126 System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length); 127 bb.put(unaligned_bytes_123456789); 128 bb.position(i); 129 bb.limit(i + BYTES_123456789.length); 130 checksum.update(bb); 131 checkChecksumOffset(checksum, expected, i); 132 } 133 } 134 testWrappedByteBufferOffset(Checksum checksum, long expected)135 private static void testWrappedByteBufferOffset(Checksum checksum, long expected) { 136 byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64]; 137 for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) { 138 checksum.reset(); 139 System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length); 140 ByteBuffer bb = ByteBuffer.wrap(unaligned_bytes_123456789); 141 bb.position(i); 142 bb.limit(i + BYTES_123456789.length); 143 checksum.update(bb); 144 checkChecksumOffset(checksum, expected, i); 145 } 146 } 147 testLittleEndianWrappedByteBufferOffset(Checksum checksum, long expected)148 private static void testLittleEndianWrappedByteBufferOffset(Checksum checksum, long expected) { 149 byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64]; 150 for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) { 151 checksum.reset(); 152 System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length); 153 ByteBuffer bb = ByteBuffer.wrap(unaligned_bytes_123456789); 154 bb.order(ByteOrder.LITTLE_ENDIAN); 155 bb.position(i); 156 bb.limit(i + BYTES_123456789.length); 157 checksum.update(bb); 158 checkChecksumOffset(checksum, expected, i); 159 } 160 } 161 testReadonlyByteBufferOffset(Checksum checksum, long expected)162 private static void testReadonlyByteBufferOffset(Checksum checksum, long expected) { 163 byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64]; 164 for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) { 165 checksum.reset(); 166 System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length); 167 ByteBuffer bb = ByteBuffer.wrap(unaligned_bytes_123456789).asReadOnlyBuffer(); 168 bb.position(i); 169 bb.limit(i + BYTES_123456789.length); 170 checksum.update(bb); 171 checkChecksumOffset(checksum, expected, i); 172 } 173 } 174 testLittleEndianReadonlyByteBufferOffset(Checksum checksum, long expected)175 private static void testLittleEndianReadonlyByteBufferOffset(Checksum checksum, long expected) { 176 byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64]; 177 for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) { 178 checksum.reset(); 179 System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length); 180 ByteBuffer bb = ByteBuffer.wrap(unaligned_bytes_123456789).asReadOnlyBuffer(); 181 bb.order(ByteOrder.LITTLE_ENDIAN); 182 bb.position(i); 183 bb.limit(i + BYTES_123456789.length); 184 checksum.update(bb); 185 checkChecksumOffset(checksum, expected, i); 186 } 187 } 188 checkChecksumOffset(Checksum checksum, long expected, int offset)189 private static void checkChecksumOffset(Checksum checksum, long expected, int offset) { 190 if (checksum.getValue() != expected) { 191 throw new RuntimeException("Calculated CRC32C result was invalid. Array offset " 192 + offset + ". Expected: " + Long.toHexString(expected) + ", Got: " 193 + Long.toHexString(checksum.getValue())); 194 } 195 } 196 } 197