1 /*
2  * Copyright (C) 2014 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package dexfuzz.rawdex.formats;
18 
19 import dexfuzz.rawdex.DexRandomAccessFile;
20 import dexfuzz.rawdex.Instruction;
21 import dexfuzz.rawdex.Opcode;
22 import dexfuzz.rawdex.OpcodeInfo;
23 
24 import java.io.IOException;
25 
26 public class Format22c extends Format2 implements ContainsVRegs, ContainsPoolIndex {
27   @Override
writeToFile(DexRandomAccessFile file, Instruction insn)28   public void writeToFile(DexRandomAccessFile file, Instruction insn) throws IOException {
29     file.writeByte((byte) insn.info.value);
30     file.writeByte((byte) (insn.vregA | (insn.vregB << 4)));
31     file.writeUShort((short) insn.vregC);
32     return;
33   }
34 
35   @Override
getA(byte[] raw)36   public long getA(byte[] raw) throws IOException {
37     return RawInsnHelper.getUnsignedLowNibbleFromByte(raw, 1);
38   }
39 
40   @Override
getB(byte[] raw)41   public long getB(byte[] raw) throws IOException {
42     return RawInsnHelper.getUnsignedHighNibbleFromByte(raw, 1);
43   }
44 
45   @Override
getC(byte[] raw)46   public long getC(byte[] raw) throws IOException {
47     return RawInsnHelper.getUnsignedShortFromTwoBytes(raw, 2);
48   }
49 
50   @Override
getVRegCount()51   public int getVRegCount() {
52     return 2;
53   }
54 
55   @Override
getPoolIndex(Instruction insn)56   public int getPoolIndex(Instruction insn) {
57     return (int) insn.vregC;
58   }
59 
60   @Override
setPoolIndex(Instruction insn, int poolIndex)61   public void setPoolIndex(Instruction insn, int poolIndex) {
62     insn.vregC = poolIndex;
63   }
64 
65   @Override
getPoolIndexKind(OpcodeInfo info)66   public PoolIndexKind getPoolIndexKind(OpcodeInfo info) {
67     if (info.opcode == Opcode.INSTANCE_OF || info.opcode == Opcode.NEW_ARRAY) {
68       return PoolIndexKind.Type;
69     }
70     return PoolIndexKind.Field;
71   }
72 }
73