/*
* Copyright (C) 2010-2016 JPEXS, All rights reserved.
*
* This library 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 3.0 of the License, or (at your option) any later version.
*
* This library 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 this library.
*/
package com.jpexs.decompiler.flash.abc.avm2.instructions.other;
import com.jpexs.decompiler.flash.abc.ABC;
import com.jpexs.decompiler.flash.abc.AVM2LocalData;
import com.jpexs.decompiler.flash.abc.avm2.AVM2Code;
import com.jpexs.decompiler.flash.abc.avm2.AVM2ConstantPool;
import com.jpexs.decompiler.flash.abc.avm2.LocalDataArea;
import com.jpexs.decompiler.flash.abc.avm2.exceptions.AVM2ExecutionException;
import com.jpexs.decompiler.flash.abc.avm2.instructions.AVM2Instruction;
import com.jpexs.decompiler.flash.abc.avm2.instructions.InstructionDefinition;
import com.jpexs.decompiler.flash.abc.avm2.model.FullMultinameAVM2Item;
import com.jpexs.decompiler.flash.abc.avm2.model.GetPropertyAVM2Item;
import com.jpexs.decompiler.flash.abc.types.Multiname;
import com.jpexs.decompiler.flash.ecma.ArrayType;
import com.jpexs.decompiler.flash.ecma.EcmaScript;
import com.jpexs.decompiler.flash.ecma.ObjectType;
import com.jpexs.decompiler.flash.ecma.Undefined;
import com.jpexs.decompiler.graph.GraphTargetItem;
import com.jpexs.decompiler.graph.TranslateStack;
import java.util.List;
/**
*
* @author JPEXS
*/
public class GetPropertyIns extends InstructionDefinition {
public GetPropertyIns() {
super(0x66, "getproperty", new int[]{AVM2Code.DAT_MULTINAME_INDEX}, true);
}
@Override
public boolean execute(LocalDataArea lda, AVM2ConstantPool constants, AVM2Instruction ins) throws AVM2ExecutionException {
if (constants.getMultiname(ins.operands[0]).kind == Multiname.MULTINAMEL) {
String name = EcmaScript.toString(lda.operandStack.pop());
Object obj = lda.operandStack.pop();
if (obj == ArrayType.EMPTY_ARRAY) {
if ("length".equals(name)) {
lda.operandStack.push(0L);
} else {
lda.operandStack.push(Undefined.INSTANCE);
}
return true;
}
if (obj == ObjectType.EMPTY_OBJECT) {
lda.operandStack.push(Undefined.INSTANCE);
return true;
}
return true;
}
return false;
}
@Override
public void translate(AVM2LocalData localData, TranslateStack stack, AVM2Instruction ins, List<GraphTargetItem> output, String path) {
int multinameIndex = ins.operands[0];
FullMultinameAVM2Item multiname = resolveMultiname(localData, true, stack, localData.getConstants(), multinameIndex, ins);
GraphTargetItem obj = stack.pop();
stack.push(new GetPropertyAVM2Item(ins, localData.lineStartInstruction, obj, multiname));
}
@Override
public int getStackPopCount(AVM2Instruction ins, ABC abc) {
int multinameIndex = ins.operands[0];
return 1 + getMultinameRequiredStackSize(abc.constants, multinameIndex);
}
@Override
public int getStackPushCount(AVM2Instruction ins, ABC abc) {
return 1;
}
}