DexBackedInstruction22c.java revision 9057764c22f050848748aac0ab31921d334c3e16
1/* 2 * Copyright 2012, 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 32package org.jf.dexlib2.dexbacked.instruction; 33 34import org.jf.dexlib2.Opcode; 35import org.jf.dexlib2.dexbacked.DexBackedDexFile; 36import org.jf.dexlib2.dexbacked.reference.DexBackedReference; 37import org.jf.dexlib2.iface.instruction.formats.Instruction22c; 38import org.jf.dexlib2.iface.reference.Reference; 39import org.jf.util.NibbleUtils; 40 41import javax.annotation.Nonnull; 42 43public class DexBackedInstruction22c extends DexBackedInstruction implements Instruction22c { 44 public DexBackedInstruction22c(@Nonnull DexBackedDexFile dexFile, 45 @Nonnull Opcode opcode, 46 int instructionStart) { 47 super(dexFile, opcode, instructionStart); 48 } 49 50 @Override 51 public int getRegisterA() { 52 return NibbleUtils.extractLowUnsignedNibble(dexFile.readByte(instructionStart + 1)); 53 } 54 55 @Override 56 public int getRegisterB() { 57 return NibbleUtils.extractHighUnsignedNibble(dexFile.readByte(instructionStart + 1)); 58 } 59 60 @Nonnull 61 @Override 62 public Reference getReference() { 63 return DexBackedReference.makeReference(dexFile, opcode.referenceType, dexFile.readUshort(instructionStart + 2)); 64 } 65 66 @Override 67 public int getReferenceType() { 68 return opcode.referenceType; 69 } 70} 71