DexBackedInstruction22c.java revision 84c1762a62d7fc6638432c6c56e0422aa8cc6939 
1/*
2 * Copyright 2012, 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.dexlib2.dexbacked.instruction;
33
34import org.jf.dexlib2.Opcode;
35import org.jf.dexlib2.dexbacked.DexBackedDexFile;
36import org.jf.dexlib2.dexbacked.reference.DexBackedReference;
37import org.jf.dexlib2.iface.instruction.formats.Instruction22c;
38import org.jf.dexlib2.iface.reference.Reference;
39import org.jf.util.NibbleUtils;
40
41import javax.annotation.Nonnull;
42
43public class DexBackedInstruction22c extends DexBackedInstruction implements Instruction22c {
44    public DexBackedInstruction22c(@Nonnull DexBackedDexFile dexFile,
45                                   @Nonnull Opcode opcode,
46                                   int instructionStart) {
47        super(dexFile, opcode, instructionStart);
48    }
49
50    @Override
51    public int getRegisterA() {
52        return NibbleUtils.extractLowUnsignedNibble(dexFile.readByte(instructionStart + 1));
53    }
54
55    @Override
56    public int getRegisterB() {
57        return NibbleUtils.extractHighUnsignedNibble(dexFile.readByte(instructionStart + 1));
58    }
59
60    @Nonnull
61    @Override
62    public Reference getReference() {
63        return DexBackedReference.makeReference(dexFile, opcode.referenceType, dexFile.readUshort(instructionStart + 2));
64    }
65}
66