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      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 
     32 package org.jf.dexlib2.dexbacked.raw;
     33 
     34 import org.jf.dexlib2.Opcodes;
     35 import org.jf.dexlib2.dexbacked.BaseDexBuffer;
     36 import org.jf.dexlib2.dexbacked.DexBackedDexFile;
     37 import org.jf.dexlib2.dexbacked.util.FixedSizeList;
     38 import org.jf.dexlib2.util.AnnotatedBytes;
     39 
     40 import javax.annotation.Nonnull;
     41 import javax.annotation.Nullable;
     42 import java.io.IOException;
     43 import java.io.Writer;
     44 import java.util.Arrays;
     45 import java.util.List;
     46 
     47 public class RawDexFile extends DexBackedDexFile {
     48     @Nonnull public final HeaderItem headerItem;
     49 
     50     public RawDexFile(@Nonnull Opcodes opcodes, @Nonnull BaseDexBuffer buf) {
     51         super(opcodes, buf);
     52         this.headerItem = new HeaderItem(this);
     53     }
     54 
     55     public RawDexFile(@Nonnull Opcodes opcodes, @Nonnull byte[] buf) {
     56         super(opcodes, buf);
     57         this.headerItem = new HeaderItem(this);
     58     }
     59 
     60     @Nonnull
     61     public byte[] readByteRange(int start, int length) {
     62         return Arrays.copyOfRange(getBuf(), start, start+length);
     63     }
     64 
     65     public int getMapOffset() {
     66         return headerItem.getMapOffset();
     67     }
     68 
     69     @Nullable
     70     public MapItem getMapItemForSection(int itemType) {
     71         for (MapItem mapItem: getMapItems()) {
     72             if (mapItem.getType() == itemType) {
     73                 return mapItem;
     74             }
     75         }
     76         return null;
     77     }
     78 
     79     public List<MapItem> getMapItems() {
     80         final int mapOffset = getMapOffset();
     81         final int mapSize = readSmallUint(mapOffset);
     82 
     83         return new FixedSizeList<MapItem>() {
     84             @Override
     85             public MapItem readItem(int index) {
     86                 int mapItemOffset = mapOffset + 4 + index * MapItem.ITEM_SIZE;
     87                 return new MapItem(RawDexFile.this, mapItemOffset);
     88             }
     89 
     90             @Override public int size() {
     91                 return mapSize;
     92             }
     93         };
     94     }
     95 
     96     public void writeAnnotations(@Nonnull Writer out, @Nonnull AnnotatedBytes annotatedBytes) throws IOException {
     97         annotatedBytes.writeAnnotations(out, getBuf());
     98     }
     99 }
    100