/*
 *  Copyright (C) 2010-2013 JPEXS
 * 
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 * 
 *  This program 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 General Public License for more details.
 * 
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.jpexs.decompiler.flash.abc.avm2.instructions.stack;

import com.jpexs.decompiler.flash.abc.ABC;
import com.jpexs.decompiler.flash.abc.avm2.AVM2Code;
import com.jpexs.decompiler.flash.abc.avm2.ConstantPool;
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.flash.abc.types.MethodBody;
import com.jpexs.decompiler.flash.abc.types.MethodInfo;
import com.jpexs.decompiler.graph.GraphSourceItemPos;
import com.jpexs.decompiler.graph.GraphTargetItem;
import java.util.HashMap;
import java.util.List;
import java.util.Stack;

public class SwapIns extends InstructionDefinition {

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

    @Override
    public void execute(LocalDataArea lda, ConstantPool constants, List<Object> arguments) {
        Object obj1 = lda.operandStack.pop();
        Object obj2 = lda.operandStack.pop();
        lda.operandStack.push(obj1);
        lda.operandStack.push(obj2);
    }

    @Override
    public void translate(boolean isStatic, int scriptIndex, int classIndex, java.util.HashMap<Integer, GraphTargetItem> localRegs, Stack<GraphTargetItem> stack, Stack<GraphTargetItem> scopeStack, ConstantPool constants, AVM2Instruction ins, MethodInfo[] method_info, List<GraphTargetItem> output, MethodBody body, ABC abc, HashMap<Integer, String> localRegNames, List<String> fullyQualifiedNames, String path, HashMap<Integer, Integer> localRegsAssignmentIps, int ip, HashMap<Integer, List<Integer>> refs, AVM2Code code) {

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

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