PackedSwitchMethodItem.java revision c6734e8a604dc8fd3788a19d1c3d19ce670511f6 
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.IndentingWriter;
32import org.jf.baksmali.Renderers.IntegerRenderer;
33import org.jf.dexlib.Code.Format.PackedSwitchDataPseudoInstruction;
34import org.jf.dexlib.CodeItem;
35import org.jf.baksmali.Adaptors.LabelMethodItem;
36import org.jf.baksmali.Adaptors.MethodDefinition;
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        implements Iterable<LabelMethodItem> {
45    private final List<LabelMethodItem> labels;
46    private final boolean dead;
47
48    public PackedSwitchMethodItem(MethodDefinition methodDefinition, CodeItem codeItem, int codeAddress, boolean dead,
49                                  PackedSwitchDataPseudoInstruction instruction) {
50        super(codeItem, codeAddress, instruction);
51
52        int baseCodeAddress = methodDefinition.getPackedSwitchBaseAddress(codeAddress);
53
54        labels = new ArrayList<LabelMethodItem>();
55        Iterator<PackedSwitchDataPseudoInstruction.PackedSwitchTarget> iterator = instruction.iterateKeysAndTargets();
56        while (iterator.hasNext()) {
57            PackedSwitchDataPseudoInstruction.PackedSwitchTarget target = iterator.next();
58            LabelMethodItem label = new LabelMethodItem(baseCodeAddress + target.targetAddressOffset, "pswitch_");
59            label = methodDefinition.getLabelCache().internLabel(label);
60            labels.add(label);
61            label.setUncommented();
62        }
63
64        this.dead = dead;
65    }
66
67    @Override
68    public boolean writeTo(IndentingWriter writer) throws IOException {
69        if (dead) {
70            writer.write("#.packed-switch ");
71            IntegerRenderer.writeTo(writer, instruction.getFirstKey());
72            writer.write('\n');
73            for (LabelMethodItem label: labels) {
74                writer.write("#   ");
75                label.writeTo(writer);
76                writer.write('\n');
77            }
78            writer.write("#.end packed-switch");
79        } else {
80            writer.write(".packed-switch ");
81            IntegerRenderer.writeTo(writer, instruction.getFirstKey());
82            writer.indent(4);
83            writer.write('\n');
84            for (LabelMethodItem label: labels) {
85                label.writeTo(writer);
86                writer.write('\n');
87            }
88            writer.deindent(4);
89            writer.write(".end packed-switch");
90        }
91        return true;
92    }
93
94    public Iterator<LabelMethodItem> iterator() {
95        return labels.iterator();
96    }
97}
98