Instruction31i.java revision 83e6f4bb6043ea09e3416878cf846f7c4c301ddf
1/* 2 * [The "BSD licence"] 3 * Copyright (c) 2009 Ben Gruver 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.DexFile; 34import org.jf.dexlib.Util.NumberUtils; 35import org.jf.dexlib.Util.Output; 36 37public class Instruction31i extends Instruction { 38 public static final Instruction.InstructionFactory Factory = new Factory(); 39 40 public static void emit(Output out, Opcode opcode, short regA, int litB) { 41 if (regA >= 1 << 8) { 42 throw new RuntimeException("The register number must be less than v256"); 43 } 44 45 out.writeByte(opcode.value); 46 out.writeByte(regA); 47 out.writeInt(litB); 48 } 49 50 private Instruction31i(Opcode opcode, byte[] buffer, int bufferIndex) { 51 super(opcode, buffer, bufferIndex); 52 } 53 54 public Format getFormat() { 55 return Format.Format31i; 56 } 57 58 public short getRegister() { 59 return NumberUtils.decodeUnsignedByte(buffer[bufferIndex + 1]); 60 } 61 62 public int getLiteral() { 63 return NumberUtils.decodeInt(buffer, bufferIndex + 2); 64 } 65 66 private static class Factory implements Instruction.InstructionFactory { 67 public Instruction makeInstruction(DexFile dexFile, Opcode opcode, byte[] buffer, int bufferIndex) { 68 return new Instruction31i(opcode, buffer, bufferIndex); 69 } 70 } 71} 72