/*
* 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.types;
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.exceptions.AVM2TypeErrorException;
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.CoerceAVM2Item;
import com.jpexs.decompiler.flash.abc.avm2.parser.script.PropertyAVM2Item;
import com.jpexs.decompiler.flash.abc.types.Multiname;
import com.jpexs.decompiler.flash.ecma.EcmaScript;
import com.jpexs.decompiler.flash.ecma.EcmaType;
import com.jpexs.decompiler.flash.ecma.Null;
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 CoerceIns extends InstructionDefinition implements CoerceOrConvertTypeIns {
public CoerceIns() {
super(0x80, "coerce", new int[]{AVM2Code.DAT_MULTINAME_INDEX}, true);
}
@Override
public boolean execute(LocalDataArea lda, AVM2ConstantPool constants, AVM2Instruction ins) throws AVM2ExecutionException {
Multiname multiname = (Multiname) ins.getParam(constants, 0);
if (multiname == null) {
throw new AVM2TypeErrorException(1034, lda.isDebug());
}
Object value = lda.operandStack.pop();
if (value == Undefined.INSTANCE) {
value = Null.INSTANCE;
}
//push and pop coerced value to specified type
EcmaType type = EcmaScript.type(value);
switch (type) {
case NUMBER:
case BOOLEAN:
lda.operandStack.push(EcmaScript.toString(value));
break;
case NULL:
case OBJECT:
case STRING:
lda.operandStack.push(value);
break;
default:
throw new AVM2TypeErrorException(1034, lda.isDebug());
}
return true;
}
@Override
public void translate(AVM2LocalData localData, TranslateStack stack, AVM2Instruction ins, List<GraphTargetItem> output, String path) {
int multinameIndex = ins.operands[0];
stack.push(new CoerceAVM2Item(ins, localData.lineStartInstruction, stack.pop(), PropertyAVM2Item.multinameToType(multinameIndex, localData.getConstants())));
}
@Override
public int getStackPopCount(AVM2Instruction ins, ABC abc) {
return 1;
}
@Override
public int getStackPushCount(AVM2Instruction ins, ABC abc) {
return 1;
}
@Override
public GraphTargetItem getTargetType(AVM2ConstantPool constants, AVM2Instruction ins) {
int multinameIndex = ins.operands[0];
return PropertyAVM2Item.multinameToType(multinameIndex, constants);
}
}