content: /*
   * Copyright (C) 2014 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package dexfuzz.rawdex;
  
  import java.io.IOException;
  
  public class EncodedValue implements RawDexObject {
    public byte valueArg;
    public byte valueType;
    public byte[] value;
    public EncodedArray encodedArray;
    public EncodedAnnotation encodedAnnotation;
  
    private static final byte VALUE_BYTE = 0x00;
    private static final byte VALUE_ARRAY = 0x1c;
    private static final byte VALUE_ANNOTATION = 0x1d;
    private static final byte VALUE_NULL = 0x1e;
    private static final byte VALUE_BOOLEAN = 0x1f;
  
    @Override
    public void read(DexRandomAccessFile file) throws IOException {
      int valueArgAndType = file.readUnsignedByte();
  
      // Get lower 5 bits.
      valueType = (byte) (valueArgAndType & 0x1f);
      // Get upper 3 bits.
      valueArg = (byte) ((valueArgAndType & 0xe0) >> 5);
  
      int size = 0;
  
      switch (valueType) {
        case VALUE_BYTE:
          size = 1;
          break;
        case VALUE_ARRAY:
          (encodedArray = new EncodedArray()).read(file);
          size = 0; // So we don't read into value.
          break;
        case VALUE_ANNOTATION:
          (encodedAnnotation = new EncodedAnnotation()).read(file);
          size = 0; // So we don't read into value.
          break;
        case VALUE_NULL:
        case VALUE_BOOLEAN:
          // No value
          size = 0;
          break;
        default:
          // All others encode value_arg as (size - 1), so...
          size = valueArg + 1;
          break;
      }
  
      if (size != 0) {
        value = new byte[size];
        for (int i = 0; i < size; i++) {
          value[i] = file.readByte();
        }
      }
    }
  
    @Override
    public void write(DexRandomAccessFile file) throws IOException {
      int valueArgAndType = ((valueType) | (valueArg << 5));
      file.writeByte(valueArgAndType);
  
      if (encodedArray != null) {
        encodedArray.write(file);
      } else if (encodedAnnotation != null) {
        encodedAnnotation.write(file);
      } else if (value != null) {
        file.write(value);
      }
    }
  
    @Override
    public void incrementIndex(IndexUpdateKind kind, int insertedIdx) {
      if (encodedArray != null) {
        encodedArray.incrementIndex(kind, insertedIdx);
      } else if (encodedAnnotation != null) {
        encodedAnnotation.incrementIndex(kind, insertedIdx);
      }
    }
  }
  