Instruction11x.java revision b3abca4c90929e31e6a8c52bc0178c44e3e53c6b
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.Code.Format; 30 31import org.jf.dexlib.Code.Instruction; 32import org.jf.dexlib.Code.Opcode; 33import org.jf.dexlib.Code.SingleRegisterInstruction; 34import org.jf.dexlib.DexFile; 35import org.jf.dexlib.Util.AnnotatedOutput; 36import org.jf.dexlib.Util.NumberUtils; 37 38public class Instruction11x extends Instruction implements SingleRegisterInstruction { 39 public static final Instruction.InstructionFactory Factory = new Factory(); 40 private byte regA; 41 42 public Instruction11x(Opcode opcode, short regA) { 43 super(opcode); 44 45 if (regA >= 1 << 8) { 46 throw new RuntimeException("The register number must be less than v256"); 47 } 48 49 this.regA = (byte)regA; 50 } 51 52 private Instruction11x(Opcode opcode, byte[] buffer, int bufferIndex) { 53 super(opcode); 54 55 this.regA = (byte)NumberUtils.decodeUnsignedByte(buffer[bufferIndex + 1]); 56 } 57 58 public void writeInstruction(AnnotatedOutput out, int currentCodeAddress) { 59 out.writeByte(opcode.value); 60 out.writeByte(regA); 61 } 62 63 public Format getFormat() { 64 return Format.Format11x; 65 } 66 67 public int getRegisterA() { 68 return regA & 0xFF; 69 } 70 71 private static class Factory implements Instruction.InstructionFactory { 72 public Instruction makeInstruction(DexFile dexFile, Opcode opcode, byte[] buffer, int bufferIndex) { 73 return new Instruction11x(opcode, buffer, bufferIndex); 74 } 75 } 76} 77