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/*
* 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);
}
}
}
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