1/* 2 * [The "BSD licence"] 3 * Copyright (c) 2010 Ben Gruver (JesusFreke) 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29package org.jf.dexlib.EncodedValue; 30 31import org.jf.dexlib.DexFile; 32import org.jf.dexlib.MethodIdItem; 33import org.jf.dexlib.Util.AnnotatedOutput; 34import org.jf.dexlib.Util.EncodedValueUtils; 35import org.jf.dexlib.Util.Input; 36 37public class MethodEncodedValue extends EncodedValue { 38 public final MethodIdItem value; 39 40 /** 41 * Constructs a new <code>MethodEncodedValue</code> by reading the method index from the given <code>Input</code> 42 * object. The <code>Input</code>'s cursor should be set to the 2nd byte of the encoded value, and the high 3 bits 43 * of the first byte should be passed as the valueArg parameter 44 * @param dexFile The <code>DexFile</code> that is being read in 45 * @param in The <code>Input</code> object to read from 46 * @param valueArg The high 3 bits of the first byte of this encoded value 47 */ 48 protected MethodEncodedValue(DexFile dexFile, Input in, byte valueArg) { 49 int index = (int) EncodedValueUtils.decodeUnsignedIntegralValue(in.readBytes(valueArg+1)); 50 value = dexFile.MethodIdsSection.getItemByIndex(index); 51 } 52 53 /** 54 * Constructs a new <code>MethodEncodedValue</code> with the given <code>MethodIdItem</code> value 55 * @param value The <code>MethodIdItem</code> value 56 */ 57 public MethodEncodedValue(MethodIdItem value) { 58 this.value = value; 59 } 60 61 /** {@inheritDoc} */ 62 public void writeValue(AnnotatedOutput out) { 63 byte[] bytes = EncodedValueUtils.encodeUnsignedIntegralValue(value.getIndex()); 64 65 if (out.annotates()) { 66 out.annotate(1, "value_type=" + ValueType.VALUE_METHOD.name() + ",value_arg=" + (bytes.length - 1)); 67 out.annotate(bytes.length, "value: " + value.getMethodString()); 68 } 69 70 out.writeByte(ValueType.VALUE_METHOD.value | ((bytes.length - 1) << 5)); 71 out.write(bytes); 72 } 73 74 /** {@inheritDoc} */ 75 public int placeValue(int offset) { 76 return offset + EncodedValueUtils.getRequiredBytesForUnsignedIntegralValue(value.getIndex()) + 1; 77 } 78 79 /** {@inheritDoc} */ 80 protected int compareValue(EncodedValue o) { 81 MethodEncodedValue other = (MethodEncodedValue)o; 82 83 return value.compareTo(other.value); 84 } 85 86 /** {@inheritDoc} */ 87 public ValueType getValueType() { 88 return ValueType.VALUE_METHOD; 89 } 90 91 @Override 92 public int hashCode() { 93 return value.hashCode(); 94 } 95} 96