| /* |
| * Copyright (c) 2013, 2015, 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.replacements.amd64; |
| |
| import org.graalvm.compiler.api.replacements.ClassSubstitution; |
| import org.graalvm.compiler.api.replacements.Fold; |
| import org.graalvm.compiler.api.replacements.Fold.InjectedParameter; |
| import org.graalvm.compiler.api.replacements.MethodSubstitution; |
| import org.graalvm.compiler.core.common.SuppressFBWarnings; |
| import org.graalvm.compiler.core.common.spi.ArrayOffsetProvider; |
| import org.graalvm.compiler.graph.Node.ConstantNodeParameter; |
| import org.graalvm.compiler.replacements.StringSubstitutions; |
| import org.graalvm.compiler.replacements.nodes.ArrayCompareToNode; |
| import org.graalvm.compiler.word.Word; |
| import jdk.internal.vm.compiler.word.Pointer; |
| |
| import jdk.vm.ci.meta.JavaKind; |
| |
| // JaCoCo Exclude |
| |
| /** |
| * Substitutions for {@link java.lang.String} methods. |
| */ |
| @ClassSubstitution(String.class) |
| public class AMD64StringSubstitutions { |
| |
| @Fold |
| static int charArrayBaseOffset(@InjectedParameter ArrayOffsetProvider arrayOffsetProvider) { |
| return arrayOffsetProvider.arrayBaseOffset(JavaKind.Char); |
| } |
| |
| @Fold |
| static int charArrayIndexScale(@InjectedParameter ArrayOffsetProvider arrayOffsetProvider) { |
| return arrayOffsetProvider.arrayScalingFactor(JavaKind.Char); |
| } |
| |
| /** Marker value for the {@link InjectedParameter} injected parameter. */ |
| static final ArrayOffsetProvider INJECTED = null; |
| |
| // Only exists in JDK <= 8 |
| @MethodSubstitution(isStatic = true, optional = true) |
| public static int indexOf(char[] source, int sourceOffset, int sourceCount, |
| @ConstantNodeParameter char[] target, int targetOffset, int targetCount, |
| int origFromIndex) { |
| int fromIndex = origFromIndex; |
| if (fromIndex >= sourceCount) { |
| return (targetCount == 0 ? sourceCount : -1); |
| } |
| if (fromIndex < 0) { |
| fromIndex = 0; |
| } |
| if (targetCount == 0) { |
| // The empty string is in every string. |
| return fromIndex; |
| } |
| |
| int totalOffset = sourceOffset + fromIndex; |
| if (sourceCount - fromIndex < targetCount) { |
| // The empty string contains nothing except the empty string. |
| return -1; |
| } |
| assert sourceCount - fromIndex > 0 && targetCount > 0; |
| |
| Pointer sourcePointer = Word.objectToTrackedPointer(source).add(charArrayBaseOffset(INJECTED)).add(totalOffset * charArrayIndexScale(INJECTED)); |
| Pointer targetPointer = Word.objectToTrackedPointer(target).add(charArrayBaseOffset(INJECTED)).add(targetOffset * charArrayIndexScale(INJECTED)); |
| int result = AMD64StringIndexOfNode.optimizedStringIndexPointer(sourcePointer, sourceCount - fromIndex, targetPointer, targetCount); |
| if (result >= 0) { |
| return result + totalOffset; |
| } |
| return result; |
| } |
| |
| @MethodSubstitution(isStatic = false) |
| @SuppressFBWarnings(value = "ES_COMPARING_PARAMETER_STRING_WITH_EQ", justification = "reference equality on the receiver is what we want") |
| public static int compareTo(String receiver, String anotherString) { |
| if (receiver == anotherString) { |
| return 0; |
| } |
| char[] value = StringSubstitutions.getValue(receiver); |
| char[] other = StringSubstitutions.getValue(anotherString); |
| return ArrayCompareToNode.compareTo(value, other, value.length << 1, other.length << 1, JavaKind.Char, JavaKind.Char); |
| } |
| |
| } |