/*
 *  Copyright (C) 2010-2021 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.stack;

import com.jpexs.decompiler.flash.abc.ABC;
import com.jpexs.decompiler.flash.abc.AVM2LocalData;
import com.jpexs.decompiler.flash.abc.avm2.AVM2ConstantPool;
import com.jpexs.decompiler.flash.abc.avm2.LocalDataArea;
import com.jpexs.decompiler.flash.abc.avm2.instructions.AVM2Instruction;
import com.jpexs.decompiler.flash.abc.avm2.instructions.InstructionDefinition;
import com.jpexs.decompiler.graph.GraphSourceItemPos;
import com.jpexs.decompiler.graph.GraphTargetItem;
import com.jpexs.decompiler.graph.TranslateStack;
import java.util.List;

/**
 *
 * @author JPEXS
 */
public class SwapIns extends InstructionDefinition {

    public SwapIns() {
        super(0x2b, "swap", new int[]{}, false);
    }

    @Override
    public boolean execute(LocalDataArea lda, AVM2ConstantPool constants, AVM2Instruction ins) {
        Object obj1 = lda.operandStack.pop();
        Object obj2 = lda.operandStack.pop();
        lda.operandStack.push(obj1);
        lda.operandStack.push(obj2);
        return true;
    }

    @Override
    public void translate(AVM2LocalData localData, TranslateStack stack, AVM2Instruction ins, List<GraphTargetItem> output, String path) {

        GraphTargetItem o1 = stack.pop();
        GraphTargetItem o2 = stack.pop();
        stack.push(o1);
        stack.push(o2);
        o1.getMoreSrc().add(new GraphSourceItemPos(ins, 0));
        o2.getMoreSrc().add(new GraphSourceItemPos(ins, 0));
    }

    @Override
    public int getStackPopCount(AVM2Instruction ins, ABC abc) {
        return 2;
    }

    @Override
    public int getStackPushCount(AVM2Instruction ins, ABC abc) {
        return 2;
    }
}
