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
17package dexfuzz.rawdex;
18
19import java.io.IOException;
20
21public class TypeList implements RawDexObject {
22  public int size;
23  public TypeItem[] list;
24
25  @Override
26  public void read(DexRandomAccessFile file) throws IOException {
27    file.alignForwards(4);
28    file.getOffsetTracker().getNewOffsettable(file, this);
29    size = file.readUInt();
30    list = new TypeItem[size];
31    for (int i = 0; i < size; i++) {
32      (list[i] = new TypeItem()).read(file);
33    }
34  }
35
36  @Override
37  public void write(DexRandomAccessFile file) throws IOException {
38    file.alignForwards(4);
39    file.getOffsetTracker().updatePositionOfNextOffsettable(file);
40    file.writeUInt(size);
41    for (TypeItem typeItem : list) {
42      typeItem.write(file);
43    }
44  }
45
46  @Override
47  public void incrementIndex(IndexUpdateKind kind, int insertedIdx) {
48    for (TypeItem type : list) {
49      type.incrementIndex(kind, insertedIdx);
50    }
51  }
52
53  /**
54   * Returns if this TypeList comes before the provided TypeList, considering the legal
55   * ordering of TypeLists in DEX files.
56   */
57  public boolean comesBefore(TypeList other) {
58    int checkSize = Math.min(size, other.size);
59    for (int i = 0; i < checkSize; i++) {
60      if (list[i].typeIdx < other.list[i].typeIdx) {
61        return true;
62      } else if (list[i].typeIdx > other.list[i].typeIdx) {
63        return false;
64      }
65    }
66    if (size == other.size) {
67      return false;
68    }
69    return true;
70  }
71}