OffsetInstructionFormatMethodItem.java revision 6eae34831fee1f116f3a453bdc5e143d68e05e03 
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.IndentingPrintWriter;
32import org.jf.dexlib.Code.Opcode;
33import org.jf.dexlib.CodeItem;
34import org.jf.dexlib.Code.Instruction;
35import org.jf.dexlib.Code.OffsetInstruction;
36import org.jf.baksmali.Adaptors.LabelMethodItem;
37import org.jf.baksmali.Adaptors.MethodDefinition;
38
39import java.io.IOException;
40
41public class OffsetInstructionFormatMethodItem<T extends Instruction & OffsetInstruction>
42        extends InstructionMethodItem<T> {
43    protected LabelMethodItem label;
44
45    public OffsetInstructionFormatMethodItem(MethodDefinition.LabelCache labelCache, CodeItem codeItem, int codeAddress,
46                                             T instruction) {
47        super(codeItem, codeAddress, instruction);
48
49        label = new LabelMethodItem(codeAddress + instruction.getTargetAddressOffset(), getLabelPrefix());
50        label = labelCache.internLabel(label);
51        label.setUncommented();
52    }
53
54    @Override
55    protected void writeTargetLabel(IndentingPrintWriter writer) throws IOException {
56        label.writeTo(writer);
57    }
58
59    public LabelMethodItem getLabel() {
60        return label;
61    }
62
63    private String getLabelPrefix() {
64        switch (instruction.getFormat()) {
65            case Format10t:
66            case Format20t:
67            case Format30t:
68                return "goto_";
69            case Format21t:
70            case Format22t:
71                return "cond_";
72            case Format31t:
73                if (instruction.opcode == Opcode.FILL_ARRAY_DATA) {
74                    return "array_";
75                }
76                if (instruction.opcode == Opcode.PACKED_SWITCH) {
77                    return "pswitch_data_";
78                }
79                assert instruction.opcode == Opcode.SPARSE_SWITCH;
80                return "sswitch_data_";
81        }
82
83        assert false;
84        return null;
85    }
86}
87