1 /* 2 * Copyright (c) 2007, 2012, 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 package org.graalvm.compiler.hotspot.test; 24 25 import java.io.DataInputStream; 26 import java.io.InputStream; 27 import java.nio.ByteBuffer; 28 import java.util.zip.CRC32; 29 30 import org.junit.Test; 31 32 import org.graalvm.compiler.core.test.GraalCompilerTest; 33 34 /** 35 * Tests compiled call to {@link CRC32#update(int, int)}. 36 */ 37 @SuppressWarnings("javadoc") 38 public class CRC32SubstitutionsTest extends GraalCompilerTest { 39 40 public static long update(byte[] input) { 41 CRC32 crc = new CRC32(); 42 for (byte b : input) { 43 crc.update(b); 44 } 45 return crc.getValue(); 46 } 47 48 @Test 49 public void test1() { 50 test("update", "some string".getBytes()); 51 } 52 53 public static long updateBytes(byte[] input, int offset, int length) { 54 CRC32 crc = new CRC32(); 55 crc.update(input, offset, length); 56 return crc.getValue(); 57 } 58 59 @Test 60 public void test2() { 61 byte[] buf = "some string".getBytes(); 62 int off = 0; 63 int len = buf.length; 64 test("updateBytes", buf, off, len); 65 } 66 67 @Test 68 public void test3() throws Throwable { 69 String classfileName = CRC32SubstitutionsTest.class.getSimpleName().replace('.', '/') + ".class"; 70 InputStream s = CRC32SubstitutionsTest.class.getResourceAsStream(classfileName); 71 byte[] buf = new byte[s.available()]; 72 new DataInputStream(s).readFully(buf); 73 test("updateBytes", buf, 0, buf.length); 74 for (int offset = 1; offset < buf.length; offset++) { 75 test("updateBytes", buf, offset, buf.length - offset); 76 } 77 } 78 79 public static long updateByteBuffer(ByteBuffer buffer) { 80 CRC32 crc = new CRC32(); 81 buffer.rewind(); 82 crc.update(buffer); 83 return crc.getValue(); 84 } 85 86 @Test 87 public void test4() throws Throwable { 88 String classfileName = CRC32SubstitutionsTest.class.getSimpleName().replace('.', '/') + ".class"; 89 InputStream s = CRC32SubstitutionsTest.class.getResourceAsStream(classfileName); 90 byte[] buf = new byte[s.available()]; 91 new DataInputStream(s).readFully(buf); 92 93 ByteBuffer directBuf = ByteBuffer.allocateDirect(buf.length); 94 directBuf.put(buf); 95 ByteBuffer heapBuf = ByteBuffer.wrap(buf); 96 97 test("updateByteBuffer", directBuf); 98 test("updateByteBuffer", heapBuf); 99 } 100 101 }