1 /* 2 * ProGuard -- shrinking, optimization, obfuscation, and preverification 3 * of Java bytecode. 4 * 5 * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu) 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the Free 9 * Software Foundation; either version 2 of the License, or (at your option) 10 * any later version. 11 * 12 * This program is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 * more details. 16 * 17 * You should have received a copy of the GNU General Public License along 18 * with this program; if not, write to the Free Software Foundation, Inc., 19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 package proguard.evaluation; 22 23 import proguard.classfile.Clazz; 24 import proguard.classfile.attribute.CodeAttribute; 25 26 /** 27 * This InstructionVisitor evaluates the instructions that it visits. 28 * 29 * @author Eric Lafortune 30 */ 31 public interface BranchUnit 32 { 33 /** 34 * Sets the new instruction offset. 35 */ branch(Clazz clazz, CodeAttribute codeAttribute, int offset, int branchTarget)36 public void branch(Clazz clazz, 37 CodeAttribute codeAttribute, 38 int offset, 39 int branchTarget); 40 41 42 /** 43 * Sets the new instruction offset, depending on the certainty of the 44 * conditional branch. 45 */ branchConditionally(Clazz clazz, CodeAttribute codeAttribute, int offset, int branchTarget, int conditional)46 public void branchConditionally(Clazz clazz, 47 CodeAttribute codeAttribute, 48 int offset, 49 int branchTarget, 50 int conditional); 51 52 53 /** 54 * Returns from the method with the given value. 55 */ returnFromMethod()56 public void returnFromMethod(); 57 58 59 /** 60 * Handles the throwing of an exception. 61 */ throwException()62 public void throwException(); 63 } 64