MapItem.java revision 8f8b67f65ec3390e92cce7d710e5b1eaabd4e248 
1/*
2 * Copyright 2013, 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.raw;
33
34import org.jf.dexlib2.dexbacked.DexBackedDexFile;
35import org.jf.dexlib2.dexbacked.raw.util.DexAnnotator;
36import org.jf.dexlib2.util.AnnotatedBytes;
37
38import javax.annotation.Nonnull;
39import javax.annotation.Nullable;
40
41public class MapItem {
42    public static final int ITEM_SIZE = 12;
43
44    public static final int TYPE_OFFSET = 0;
45    public static final int SIZE_OFFSET = 4;
46    public static final int OFFSET_OFFSET = 8;
47
48    private final DexBackedDexFile dexFile;
49    private final int offset;
50
51    public MapItem(DexBackedDexFile dexFile, int offset) {
52        this.dexFile = dexFile;
53        this.offset = offset;
54    }
55
56    public int getType() {
57        return dexFile.readUshort(offset + TYPE_OFFSET);
58    }
59
60    @Nonnull
61    public String getName() {
62        return ItemType.getItemTypeName(getType());
63    }
64
65    public int getItemCount() {
66        return dexFile.readSmallUint(offset + SIZE_OFFSET);
67    }
68
69    public int getOffset() {
70        return dexFile.readSmallUint(offset + OFFSET_OFFSET);
71    }
72
73    @Nonnull
74    public static SectionAnnotator makeAnnotator(@Nonnull DexAnnotator annotator, @Nonnull MapItem mapItem) {
75        return new SectionAnnotator(annotator, mapItem) {
76            @Nonnull @Override public String getItemName() {
77                return "map_item";
78            }
79
80            @Override
81            protected void annotateItem(@Nonnull AnnotatedBytes out, int itemIndex, @Nullable String itemIdentity) {
82                int itemType = dexFile.readUshort(out.getCursor());
83                out.annotate(2, "type = 0x%x: %s", itemType, ItemType.getItemTypeName(itemType));
84
85                out.annotate(2, "unused");
86
87                int size = dexFile.readSmallUint(out.getCursor());
88                out.annotate(4, "size = %d", size);
89
90                int offset = dexFile.readSmallUint(out.getCursor());
91                out.annotate(4, "offset = 0x%x", offset);
92            }
93
94            @Override public void annotateSection(@Nonnull AnnotatedBytes out) {
95                out.moveTo(sectionOffset);
96                int mapItemCount = dexFile.readSmallUint(out.getCursor());
97                out.annotate(4, "size = %d", mapItemCount);
98
99                super.annotateSectionInner(out);
100            }
101        };
102    }
103}
104