1/*
2 * Copyright 2014, Google Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 *     * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *     * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 *     * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32package org.jf.smalidea.dexlib.instruction;
33
34import com.google.common.base.Function;
35import com.google.common.collect.Lists;
36import org.jf.dexlib2.Opcode;
37import org.jf.dexlib2.iface.instruction.SwitchElement;
38import org.jf.dexlib2.iface.instruction.formats.SparseSwitchPayload;
39import org.jf.smalidea.psi.impl.*;
40import org.jf.smalidea.util.InstructionUtils;
41
42import javax.annotation.Nonnull;
43import java.util.List;
44
45public class SmalideaSparseSwitchPayload extends SmalideaInstruction implements SparseSwitchPayload {
46    public SmalideaSparseSwitchPayload(@Nonnull SmaliInstruction instruction) {
47        super(instruction);
48    }
49
50    @Nonnull @Override public List<? extends SwitchElement> getSwitchElements() {
51        List<SmaliSparseSwitchElement> elements = psiInstruction.getSparseSwitchElements();
52
53        SmaliMethod smaliMethod = psiInstruction.getParentMethod();
54        SmaliInstruction sparseSwitchInstruction = InstructionUtils.findFirstInstructionWithTarget(
55                smaliMethod, Opcode.SPARSE_SWITCH, psiInstruction.getOffset());
56        final int baseOffset;
57
58        if (sparseSwitchInstruction == null) {
59            baseOffset = 0;
60        } else {
61            baseOffset = sparseSwitchInstruction.getOffset();
62        }
63
64        return Lists.transform(elements, new Function<SmaliSparseSwitchElement, SwitchElement>() {
65            @Override public SwitchElement apply(final SmaliSparseSwitchElement element) {
66                return new SwitchElement() {
67                    @Override public int getKey() {
68                        return (int)element.getKey().getIntegralValue();
69                    }
70
71                    @Override public int getOffset() {
72                        SmaliLabelReference labelReference = element.getTarget();
73                        if (labelReference == null) {
74                            return 0;
75                        }
76
77                        SmaliLabel label = labelReference.resolve();
78                        if (label == null) {
79                            return 0;
80                        }
81
82                        return label.getOffset() - baseOffset;
83                    }
84                };
85            }
86        });
87    }
88
89    @Override public int getCodeUnits() {
90        return psiInstruction.getInstructionSize()/2;
91    }
92}
93