| /* |
| * Copyright (c) 2012, 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. |
| */ |
| package org.graalvm.compiler.jtt.loop; |
| |
| import org.junit.Test; |
| |
| import org.graalvm.compiler.jtt.JTTTest; |
| |
| /* |
| * see java.lang.String.lastIndexOf(char[], int, int, char[], int ,int, int) |
| */ |
| public class LoopLastIndexOf extends JTTTest { |
| |
| private static final char[] v1 = new char[]{'a', 'b', 'c', 'd', 'a', 'b', 'c', 'd', 'a', 'b', 'c', 'd'}; |
| private static final char[] v2 = new char[]{'d', 'a'}; |
| private static final char[] v3 = new char[]{'d', 'b', 'c'}; |
| private static final char[] v4 = new char[]{'z', 'a', 'b', 'c'}; |
| |
| public static int test(char[] source, int sourceOffset, int sourceCount, char[] target, int targetOffset, int targetCount, int fromIndexParam) { |
| int rightIndex = sourceCount - targetCount; |
| int fromIndex = fromIndexParam; |
| if (fromIndex < 0) { |
| return -1; |
| } |
| if (fromIndex > rightIndex) { |
| fromIndex = rightIndex; |
| } |
| /* Empty string always matches. */ |
| if (targetCount == 0) { |
| return fromIndex; |
| } |
| |
| int strLastIndex = targetOffset + targetCount - 1; |
| char strLastChar = target[strLastIndex]; |
| int min = sourceOffset + targetCount - 1; |
| int i = min + fromIndex; |
| |
| startSearchForLastChar: while (true) { |
| while (i >= min && source[i] != strLastChar) { |
| i--; |
| } |
| if (i < min) { |
| return -1; |
| } |
| int j = i - 1; |
| int start = j - (targetCount - 1); |
| int k = strLastIndex - 1; |
| |
| while (j > start) { |
| if (source[j--] != target[k--]) { |
| i--; |
| continue startSearchForLastChar; |
| } |
| } |
| return start - sourceOffset + 1; |
| } |
| } |
| |
| @Test |
| public void run0() throws Throwable { |
| runTest("test", v1, 0, v1.length, v2, 0, v2.length, 10); |
| } |
| |
| @Test |
| public void run1() throws Throwable { |
| runTest("test", v1, 0, v1.length, v3, 0, v3.length, 10); |
| } |
| |
| @Test |
| public void run2() throws Throwable { |
| runTest("test", v1, 0, v1.length, v4, 0, v4.length, 10); |
| } |
| |
| @Test |
| public void run3() throws Throwable { |
| runTest("test", v1, 1, v1.length - 1, v3, 0, v3.length, 10); |
| } |
| |
| @Test |
| // (expected = ArrayIndexOutOfBoundsException.class) |
| public void run4() throws Throwable { |
| runTest("test", v1, 1, v1.length, v3, 0, v3.length, 10); |
| } |
| } |