/*
* Copyright (C) 2011 Stephane Godbillon
*
* This file is part of BytecodeParser. See the README file in the root
* directory of this project.
*
* BytecodeParser is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* BytecodeParser is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License
* along with BytecodeParser. If not, see <http://www.gnu.org/licenses/>.
*/
package bytecodeparser.analysis.decoders;
import java.util.Arrays;
import bytecodeparser.Context;
import bytecodeparser.analysis.opcodes.ArrayOpcode;
import bytecodeparser.analysis.stack.Constant.IntegerConstant;
import bytecodeparser.analysis.stack.Stack;
import bytecodeparser.analysis.stack.Stack.StackElementLength;
import bytecodeparser.analysis.stack.StackElement;
import bytecodeparser.analysis.stack.TrackableArray;
/**
* A decoded array operation op.
* @author Stephane Godbillon
*
*/
public class DecodedArrayOp extends DecodedBasicOp {
public DecodedArrayOp(ArrayOpcode op, Context context, int index) {
super(op, context, index);
}
@Override
public void simulate(Stack stack) {
if(!this.op.as(ArrayOpcode.class).isLoad) {
StackElementLength[] pops = Arrays.copyOf(getPops(), getPops().length - 1);
StackElement subject = stack.getFromTop(StackElementLength.add(pops));
if(subject instanceof TrackableArray) {
TrackableArray array = (TrackableArray) subject;
StackElement i = stack.getFromTop(StackElementLength.add(array.componentLength));
if(i instanceof IntegerConstant) {
StackElement value = stack.peek(array.componentLength);
array.set(((IntegerConstant) i).getValue(), value);
} else {
array.isDirty = true;
}
}
}
super.simulate(stack);
}
}