--- /dev/null 2013-05-21 16:49:18.000000000 -0400 +++ new/test/java/util/zip/CRCandAdlerTest.java 2013-05-21 16:49:18.000000000 -0400 @@ -0,0 +1,190 @@ +/* + * Copyright (c) 2013, 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. + */ + +/* + @test + @bug 7088419 + @summary Ensure that the byte-at-a-time, byte array, and DirectByteBuffer + methods of CRC32 and Adler32 are consistent across a range of inputs. + */ + +import java.nio.ByteBuffer; +import java.util.zip.Adler32; +import java.util.zip.CRC32; +import java.util.zip.Checksum; + +public class CRCandAdlerTest { + + public static void main(String[] args) throws Exception { + + byte[] b = initializedBytes(4096 * 4096); + + { + CRC32 crc1 = new CRC32(); + CRC32 crc2 = new CRC32(); + CRC32 crc3 = new CRC32(); + CRC32 crc4 = new CRC32(); + + crc1.update(b, 0, b.length); + updateSerial(crc2, b, 0, b.length); + updateDirect(crc3, b, 0, b.length); + updateSerialSlow(crc4, b, 0, b.length); + + check(crc1, crc2); + check(crc3, crc4); + check(crc1, crc3); + + crc1.update(17); + crc2.update(17); + crc3.update(17); + crc4.update(17); + + crc1.update(b, 1, b.length-2); + updateSerial(crc2, b, 1, b.length-2); + updateDirect(crc3, b, 1, b.length-2); + updateSerialSlow(crc4, b, 1, b.length-2); + + check(crc1, crc2); + check(crc3, crc4); + check(crc1, crc3); + + report("finished huge crc", crc1, crc2, crc3, crc4); + + for (int i = 0; i < 256; i++) { + for (int j = 0; j < 256; j += 1) { + crc1.update(b, i, j); + updateSerial(crc2, b, i, j); + updateDirect(crc3, b, i, j); + updateSerialSlow(crc4, b, i, j); + + check(crc1, crc2); + check(crc3, crc4); + check(crc1, crc3); + + } + } + + report("finished small survey crc", crc1, crc2, crc3, crc4); + } + + { + Adler32 crc1 = new Adler32(); + Adler32 crc2 = new Adler32(); + Adler32 crc3 = new Adler32(); + Adler32 crc4 = new Adler32(); + // Test long CRC. + + crc1.update(b, 0, b.length); + updateSerial(crc2, b, 0, b.length); + updateDirect(crc3, b, 0, b.length); + updateSerialSlow(crc4, b, 0, b.length); + + check(crc1, crc2); + check(crc3, crc4); + check(crc1, crc3); + + crc1.update(17); + crc2.update(17); + crc3.update(17); + crc4.update(17); + + crc1.update(b, 1, b.length-2); + updateSerial(crc2, b, 1, b.length-2); + updateDirect(crc3, b, 1, b.length-2); + updateSerialSlow(crc4, b, 1, b.length-2); + + check(crc1, crc2); + check(crc3, crc4); + check(crc1, crc3); + + report("finished huge adler32", crc1, crc2, crc3, crc4); + + for (int i = 0; i < 256; i++) { + for (int j = 0; j < 256; j += 1) { + crc1.update(b, i, j); + updateSerial(crc2, b, i, j); + updateDirect(crc3, b, i, j); + updateSerialSlow(crc4, b, i, j); + + check(crc1, crc2); + check(crc3, crc4); + check(crc1, crc3); + + } + } + + report("finished small survey adler32", crc1, crc2, crc3, crc4); + } + } + + + private static void report(String s, Checksum crc1, Checksum crc2, + Checksum crc3, Checksum crc4) { + System.out.println(s + ", crc1 = " + crc1.getValue() + + ", crc2 = " + crc2.getValue()+ + ", crc3 = " + crc3.getValue()+ + ", crc4 = " + crc4.getValue()); + } + + private static void check(Checksum crc1, Checksum crc2) throws Exception { + if (crc1.getValue() != crc2.getValue()) { + String s = "value 1 = " + crc1.getValue() + ", value 2 = " + crc2.getValue(); + System.err.println(s); + throw new Exception(s); + } + } + + private static byte[] initializedBytes(int M) { + byte[] bytes = new byte[M]; + for (int i = 0; i < bytes.length; i++) { + bytes[i] = (byte) i; + } + return bytes; + } + + private static void updateSerial(Checksum crc, byte[] b, int start, int length) { + for (int i = 0; i < length; i++) + crc.update(b[i+start]); + } + + private static void updateSerialSlow(Checksum crc, byte[] b, int start, int length) { + for (int i = 0; i < length; i++) + crc.update(b[i+start]); + crc.getValue(); + } + + private static void updateDirect(CRC32 crc3, byte[] b, int start, int length) { + ByteBuffer buf = ByteBuffer.allocateDirect(length); + buf.put(b, start, length); + buf.flip(); + crc3.update(buf); + } + + private static void updateDirect(Adler32 crc3, byte[] b, int start, int length) { + ByteBuffer buf = ByteBuffer.allocateDirect(length); + buf.put(b, start, length); + buf.flip(); + crc3.update(buf); + } + +}