1/* 2 * [The "BSD licence"] 3 * Copyright (c) 2010 Ben Gruver (JesusFreke) 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29package org.jf.baksmali.Adaptors.Format; 30 31import org.jf.baksmali.Adaptors.LabelMethodItem; 32import org.jf.baksmali.Adaptors.MethodDefinition; 33import org.jf.util.IndentingWriter; 34import org.jf.baksmali.Renderers.IntegerRenderer; 35import org.jf.dexlib.Code.Format.PackedSwitchDataPseudoInstruction; 36import org.jf.dexlib.CodeItem; 37 38import java.io.IOException; 39import java.util.ArrayList; 40import java.util.Iterator; 41import java.util.List; 42 43public class PackedSwitchMethodItem extends InstructionMethodItem<PackedSwitchDataPseudoInstruction> { 44 private final List<PackedSwitchTarget> targets; 45 46 public PackedSwitchMethodItem(MethodDefinition methodDefinition, CodeItem codeItem, int codeAddress, 47 PackedSwitchDataPseudoInstruction instruction) { 48 super(codeItem, codeAddress, instruction); 49 50 int baseCodeAddress = methodDefinition.getPackedSwitchBaseAddress(codeAddress); 51 52 targets = new ArrayList<PackedSwitchTarget>(); 53 Iterator<PackedSwitchDataPseudoInstruction.PackedSwitchTarget> iterator = instruction.iterateKeysAndTargets(); 54 55 if (baseCodeAddress >= 0) { 56 while (iterator.hasNext()) { 57 PackedSwitchDataPseudoInstruction.PackedSwitchTarget target = iterator.next(); 58 PackedSwitchLabelTarget packedSwitchLabelTarget = new PackedSwitchLabelTarget(); 59 60 61 LabelMethodItem label = new LabelMethodItem(baseCodeAddress + target.targetAddressOffset, "pswitch_"); 62 label = methodDefinition.getLabelCache().internLabel(label); 63 packedSwitchLabelTarget.Target = label; 64 targets.add(packedSwitchLabelTarget); 65 } 66 } else { 67 while (iterator.hasNext()) { 68 PackedSwitchDataPseudoInstruction.PackedSwitchTarget target = iterator.next(); 69 PackedSwitchOffsetTarget packedSwitchOffsetTarget = new PackedSwitchOffsetTarget(); 70 71 72 packedSwitchOffsetTarget.Target = target.targetAddressOffset; 73 targets.add(packedSwitchOffsetTarget); 74 } 75 } 76 } 77 78 @Override 79 public boolean writeTo(IndentingWriter writer) throws IOException { 80 writer.write(".packed-switch "); 81 IntegerRenderer.writeTo(writer, instruction.getFirstKey()); 82 writer.indent(4); 83 writer.write('\n'); 84 for (PackedSwitchTarget target: targets) { 85 target.writeTargetTo(writer); 86 writer.write('\n'); 87 } 88 writer.deindent(4); 89 writer.write(".end packed-switch"); 90 return true; 91 } 92 93 private static abstract class PackedSwitchTarget { 94 public abstract void writeTargetTo(IndentingWriter writer) throws IOException; 95 } 96 97 private static class PackedSwitchLabelTarget extends PackedSwitchTarget { 98 public LabelMethodItem Target; 99 public void writeTargetTo(IndentingWriter writer) throws IOException { 100 Target.writeTo(writer); 101 } 102 } 103 104 private static class PackedSwitchOffsetTarget extends PackedSwitchTarget { 105 public int Target; 106 public void writeTargetTo(IndentingWriter writer) throws IOException { 107 if (Target >= 0) { 108 writer.write('+'); 109 } 110 writer.printSignedIntAsDec(Target); 111 } 112 } 113} 114