1/* 2 * Copyright 2013, 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.builder; 33 34import org.jf.dexlib2.Opcode; 35import org.jf.dexlib2.iface.instruction.OffsetInstruction; 36 37import javax.annotation.Nonnull; 38 39public abstract class BuilderOffsetInstruction extends BuilderInstruction implements OffsetInstruction { 40 @Nonnull 41 protected final Label target; 42 43 public BuilderOffsetInstruction(@Nonnull Opcode opcode, 44 @Nonnull Label target) { 45 super(opcode); 46 this.target = target; 47 } 48 49 @Override public int getCodeOffset() { 50 int codeOffset = internalGetCodeOffset(); 51 if ((this.getCodeUnits() == 1 && (codeOffset < Byte.MIN_VALUE || codeOffset > Byte.MAX_VALUE)) || 52 (this.getCodeUnits() == 2 && (codeOffset < Short.MIN_VALUE || codeOffset > Short.MAX_VALUE))) { 53 throw new IllegalStateException("Target is out of range"); 54 } 55 return codeOffset; 56 } 57 58 59 int internalGetCodeOffset() { 60 return target.getCodeAddress() - this.getLocation().getCodeAddress(); 61 } 62 63 @Nonnull 64 public Label getTarget() { 65 return target; 66 } 67} 68