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/*
* [The "BSD licence"]
* Copyright (c) 2010 Ben Gruver (JesusFreke)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.jf.dexlib.EncodedValue;
import org.jf.dexlib.DexFile;
import org.jf.dexlib.FieldIdItem;
import org.jf.dexlib.Util.AnnotatedOutput;
import org.jf.dexlib.Util.EncodedValueUtils;
import org.jf.dexlib.Util.Input;
public class EnumEncodedValue extends EncodedValue {
public final FieldIdItem value;
/**
* Constructs a new <code>EnumEncodedValue</code> by reading the field index from the given <code>Input</code>
* object. The <code>Input</code>'s cursor should be set to the 2nd byte of the encoded value, and the high 3 bits
* of the first byte should be passed as the valueArg parameter
* @param dexFile The <code>DexFile</code> that is being read in
* @param in The <code>Input</code> object to read from
* @param valueArg The high 3 bits of the first byte of this encoded value
*/
protected EnumEncodedValue(DexFile dexFile, Input in, byte valueArg) {
int index = (int) EncodedValueUtils.decodeUnsignedIntegralValue(in.readBytes(valueArg+1));
value = dexFile.FieldIdsSection.getItemByIndex(index);
}
/**
* Constructs a new <code>EnumEncodedValue</code> with the given <code>FieldIdItem</code> value
* @param value The <code>FieldIdItem</code> value
*/
public EnumEncodedValue(FieldIdItem value) {
this.value = value;
}
/** {@inheritDoc} */
public void writeValue(AnnotatedOutput out) {
byte[] bytes = EncodedValueUtils.encodeUnsignedIntegralValue(value.getIndex());
if (out.annotates()) {
out.annotate(1, "value_type=" + ValueType.VALUE_ENUM.name() + ",value_arg=" + (bytes.length - 1));
out.annotate(bytes.length, "value: " + value.getFieldString());
}
out.writeByte(ValueType.VALUE_ENUM.value | ((bytes.length - 1) << 5));
out.write(bytes);
}
/** {@inheritDoc} */
public int placeValue(int offset) {
return offset + EncodedValueUtils.getRequiredBytesForUnsignedIntegralValue(value.getIndex()) + 1;
}
/** {@inheritDoc} */
protected int compareValue(EncodedValue o) {
EnumEncodedValue other = (EnumEncodedValue)o;
return value.compareTo(other.value);
}
/** {@inheritDoc} */
public ValueType getValueType() {
return ValueType.VALUE_ENUM;
}
@Override
public int hashCode() {
return value.hashCode();
}
}
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