Instruction52c.java revision 1efc2c038842f85728b0ae4311a0e550b826390b 
1/*
2 * Copyright 2011, 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.dexlib.Code.Format;
33
34import org.jf.dexlib.Code.Instruction;
35import org.jf.dexlib.Code.Opcode;
36import org.jf.dexlib.Code.TwoRegisterInstruction;
37import org.jf.dexlib.DexFile;
38import org.jf.dexlib.Item;
39import org.jf.dexlib.Util.AnnotatedOutput;
40import org.jf.dexlib.Util.NumberUtils;
41
42public class Instruction52c extends InstructionWithJumboReference implements TwoRegisterInstruction {
43    public static final InstructionFactory Factory = new Factory();
44    private short regA;
45    private short regB;
46
47    public Instruction52c(Opcode opcode, int regA, int regB, Item referencedItem) {
48        super(opcode, referencedItem);
49
50        if (regA >= 1 << 16) {
51            throw new RuntimeException("The register number must be less than v65536");
52        }
53
54        if (regB >= 1 << 16) {
55            throw new RuntimeException("The register number must be less than v65536");
56        }
57
58        this.regA = (short)regA;
59        this.regB = (short)regB;
60    }
61
62    private Instruction52c(DexFile dexFile, Opcode opcode, byte[] buffer, int bufferIndex) {
63        super(dexFile, opcode, buffer, bufferIndex);
64
65        this.regA = (short)NumberUtils.decodeUnsignedShort(buffer, bufferIndex + 6);
66        this.regB = (short)NumberUtils.decodeUnsignedShort(buffer, bufferIndex + 8);
67    }
68
69    protected void writeInstruction(AnnotatedOutput out, int currentCodeAddress) {
70        out.writeByte(0xFF);
71        out.writeByte(opcode.value);
72        out.writeInt(getReferencedItem().getIndex());
73        out.writeShort(getRegisterA());
74        out.writeShort(getRegisterB());
75    }
76
77    public Format getFormat() {
78        return Format.Format52c;
79    }
80
81    public int getRegisterA() {
82        return regA & 0xFFFF;
83    }
84
85    public int getRegisterB() {
86        return regB & 0xFFFF;
87    }
88
89    private static class Factory implements InstructionFactory {
90        public Instruction makeInstruction(DexFile dexFile, Opcode opcode, byte[] buffer, int bufferIndex) {
91            return new Instruction52c(dexFile, opcode, buffer, bufferIndex);
92        }
93    }
94}
95