/*
 * This file is part of JOP, the Java Optimized Processor
 *   see <http://www.jopdesign.com/>
 *
 * Copyright (C) 2010, Stefan Hepp (stefan@stefant.org).
 *
 * 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.jopdesign.common.type;

import org.apache.bcel.Constants;
import org.apache.bcel.classfile.Constant;
import org.apache.bcel.classfile.ConstantFloat;
import org.apache.bcel.generic.BasicType;
import org.apache.bcel.generic.ConstantPoolGen;
import org.apache.bcel.generic.FCONST;
import org.apache.bcel.generic.Instruction;
import org.apache.bcel.generic.LDC;
import org.apache.bcel.generic.LDC2_W;
import org.apache.bcel.generic.LDC_W;
import org.apache.bcel.generic.Type;

/**
 * @author Stefan Hepp (stefan@stefant.org)
 */
public class ConstantFloatInfo extends ConstantInfo<Float, BasicType> {

    public ConstantFloatInfo(Float value) {
        super(Constants.CONSTANT_Float, value);
    }

    @Override
    public ClassRef getClassRef() {
        return null;
    }

    @Override
    public BasicType getType() {
        return Type.FLOAT;
    }

    @Override
    public Constant createConstant(ConstantPoolGen cpg) {
        return new ConstantFloat(getValue());
    }

    @Override
    public int addConstant(ConstantPoolGen cpg) {
        return cpg.addFloat(getValue());
    }

    @Override
    public int lookupConstant(ConstantPoolGen cpg) {
        return cpg.lookupFloat(getValue());
    }

    @Override
    public Instruction createPushInstruction(ConstantPoolGen cpg) {
        if (getValue() == 0.0f || getValue() == 1.0f || getValue() == 2.0f) {
            return new FCONST(getValue());
        }
        int index = addConstant(cpg);
        return index < 256 ? new LDC(index) : new LDC_W(index);
    }
}