1 /* 2 * ProGuard -- shrinking, optimization, obfuscation, and preverification 3 * of Java bytecode. 4 * 5 * Copyright (c) 2002-2013 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.classfile.editor; 22 23 import proguard.classfile.attribute.*; 24 25 /** 26 * This class can add local variables to a given local variable table attribute. 27 * Local variables to be added must have been filled out beforehand. 28 * 29 * @author Eric Lafortune 30 */ 31 public class LocalVariableTableAttributeEditor 32 { 33 private LocalVariableTableAttribute targetLocalVariableTableAttribute; 34 35 36 /** 37 * Creates a new LocalVariableTableAttributeEditor that will edit line numbers 38 * in the given line number table attribute. 39 */ LocalVariableTableAttributeEditor(LocalVariableTableAttribute targetLocalVariableTableAttribute)40 public LocalVariableTableAttributeEditor(LocalVariableTableAttribute targetLocalVariableTableAttribute) 41 { 42 this.targetLocalVariableTableAttribute = targetLocalVariableTableAttribute; 43 } 44 45 46 /** 47 * Adds a given line number to the line number table attribute. 48 */ addLocalVariableInfo(LocalVariableInfo localVariableInfo)49 public void addLocalVariableInfo(LocalVariableInfo localVariableInfo) 50 { 51 int localVariableTableLength = targetLocalVariableTableAttribute.u2localVariableTableLength; 52 LocalVariableInfo[] localVariableTable = targetLocalVariableTableAttribute.localVariableTable; 53 54 // Make sure there is enough space for the new localVariableInfo. 55 if (localVariableTable.length <= localVariableTableLength) 56 { 57 targetLocalVariableTableAttribute.localVariableTable = new LocalVariableInfo[localVariableTableLength+1]; 58 System.arraycopy(localVariableTable, 0, 59 targetLocalVariableTableAttribute.localVariableTable, 0, 60 localVariableTableLength); 61 localVariableTable = targetLocalVariableTableAttribute.localVariableTable; 62 } 63 64 // Add the localVariableInfo. 65 localVariableTable[targetLocalVariableTableAttribute.u2localVariableTableLength++] = localVariableInfo; 66 } 67 }