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/*
* Copyright (c) 2014, 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.
*
* 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.
*/
/**
* Base class for Checksum tests
*/
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.charset.StandardCharsets;
import java.util.zip.Checksum;
public class ChecksumBase {
private static final byte[] BYTES_123456789 = "123456789".getBytes(StandardCharsets.US_ASCII);
public static void testAll(Checksum checksum, long expected) {
testBytes(checksum, expected);
testByteArray(checksum, expected);
testWrappedByteBuffer(checksum, expected);
testReadonlyByteBuffer(checksum, expected);
testDirectByteBuffer(checksum, expected);
testByteArrayOffset(checksum, expected);
testDirectByteBufferOffset(checksum, expected);
testLittleEndianDirectByteBufferOffset(checksum, expected);
testWrappedByteBufferOffset(checksum, expected);
testLittleEndianWrappedByteBufferOffset(checksum, expected);
testReadonlyByteBufferOffset(checksum, expected);
testLittleEndianReadonlyByteBufferOffset(checksum, expected);
}
private static void testBytes(Checksum checksum, long expected) {
checksum.reset();
for (byte bits : BYTES_123456789) {
checksum.update(bits);
}
checkChecksum(checksum, expected);
}
private static void testByteArray(Checksum checksum, long expected) {
checksum.reset();
checksum.update(BYTES_123456789);
checkChecksum(checksum, expected);
}
private static void testWrappedByteBuffer(Checksum checksum, long expected) {
checksum.reset();
ByteBuffer bb = ByteBuffer.wrap(BYTES_123456789);
checksum.update(bb);
checkChecksum(checksum, expected);
}
private static void testReadonlyByteBuffer(Checksum checksum, long expected) {
checksum.reset();
ByteBuffer bb = ByteBuffer.wrap(BYTES_123456789).asReadOnlyBuffer();
checksum.update(bb);
checkChecksum(checksum, expected);
}
private static void testDirectByteBuffer(Checksum checksum, long expected) {
checksum.reset();
ByteBuffer bb = ByteBuffer.allocateDirect(BYTES_123456789.length);
bb.put(BYTES_123456789);
bb.rewind();
checksum.update(bb);
checkChecksum(checksum, expected);
}
private static void checkChecksum(Checksum checksum, long expected) {
if (checksum.getValue() != expected) {
throw new RuntimeException("Calculated checksum result was invalid."
+ " Expected " + Long.toHexString(expected)
+ ", but got " + Long.toHexString(checksum.getValue()) + ".");
}
}
private static void testByteArrayOffset(Checksum checksum, long expected) {
byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64];
for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) {
checksum.reset();
System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length);
checksum.update(unaligned_bytes_123456789, i, BYTES_123456789.length);
checkChecksumOffset(checksum, expected, i);
}
}
private static void testDirectByteBufferOffset(Checksum checksum, long expected) {
byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64];
for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) {
checksum.reset();
ByteBuffer bb = ByteBuffer.allocateDirect(unaligned_bytes_123456789.length);
System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length);
bb.put(unaligned_bytes_123456789);
bb.position(i);
bb.limit(i + BYTES_123456789.length);
checksum.update(bb);
checkChecksumOffset(checksum, expected, i);
}
}
private static void testLittleEndianDirectByteBufferOffset(Checksum checksum, long expected) {
byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64];
for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) {
checksum.reset();
ByteBuffer bb = ByteBuffer.allocateDirect(unaligned_bytes_123456789.length);
bb.order(ByteOrder.LITTLE_ENDIAN);
System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length);
bb.put(unaligned_bytes_123456789);
bb.position(i);
bb.limit(i + BYTES_123456789.length);
checksum.update(bb);
checkChecksumOffset(checksum, expected, i);
}
}
private static void testWrappedByteBufferOffset(Checksum checksum, long expected) {
byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64];
for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) {
checksum.reset();
System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length);
ByteBuffer bb = ByteBuffer.wrap(unaligned_bytes_123456789);
bb.position(i);
bb.limit(i + BYTES_123456789.length);
checksum.update(bb);
checkChecksumOffset(checksum, expected, i);
}
}
private static void testLittleEndianWrappedByteBufferOffset(Checksum checksum, long expected) {
byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64];
for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) {
checksum.reset();
System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length);
ByteBuffer bb = ByteBuffer.wrap(unaligned_bytes_123456789);
bb.order(ByteOrder.LITTLE_ENDIAN);
bb.position(i);
bb.limit(i + BYTES_123456789.length);
checksum.update(bb);
checkChecksumOffset(checksum, expected, i);
}
}
private static void testReadonlyByteBufferOffset(Checksum checksum, long expected) {
byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64];
for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) {
checksum.reset();
System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length);
ByteBuffer bb = ByteBuffer.wrap(unaligned_bytes_123456789).asReadOnlyBuffer();
bb.position(i);
bb.limit(i + BYTES_123456789.length);
checksum.update(bb);
checkChecksumOffset(checksum, expected, i);
}
}
private static void testLittleEndianReadonlyByteBufferOffset(Checksum checksum, long expected) {
byte[] unaligned_bytes_123456789 = new byte[BYTES_123456789.length + 64];
for (int i = 0; i < unaligned_bytes_123456789.length - BYTES_123456789.length; i++) {
checksum.reset();
System.arraycopy(BYTES_123456789, 0, unaligned_bytes_123456789, i, BYTES_123456789.length);
ByteBuffer bb = ByteBuffer.wrap(unaligned_bytes_123456789).asReadOnlyBuffer();
bb.order(ByteOrder.LITTLE_ENDIAN);
bb.position(i);
bb.limit(i + BYTES_123456789.length);
checksum.update(bb);
checkChecksumOffset(checksum, expected, i);
}
}
private static void checkChecksumOffset(Checksum checksum, long expected, int offset) {
if (checksum.getValue() != expected) {
throw new RuntimeException("Calculated CRC32C result was invalid. Array offset "
+ offset + ". Expected: " + Long.toHexString(expected) + ", Got: "
+ Long.toHexString(checksum.getValue()));
}
}
}
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