/* Copyright (C) 2004-2007 Sami Koivu
*
* 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 2.1 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; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package net.sf.rej.java.instruction;
import java.util.ArrayList;
import java.util.List;
import net.sf.rej.java.constantpool.ConstantPoolInfo;
import net.sf.rej.java.constantpool.DoubleInfo;
import net.sf.rej.java.constantpool.LongInfo;
import net.sf.rej.util.ByteSerializer;
import net.sf.rej.util.ByteToolkit;
/**
* Push long or double from constant pool.
*
* @author Sami Koivu
*/
public class _ldc2_w extends Instruction {
public static final int OPCODE = 0x14;
public static final String MNEMONIC = "ldc2_w";
public static final int SIZE = 3;
private int index = 0;
public _ldc2_w() {
}
@Override
public int getOpcode() {
return OPCODE;
}
@Override
public String getMnemonic() {
return MNEMONIC;
}
@Override
public int getSize() {
return SIZE;
}
@Override
public void execute(ExecutionContext ec) {
}
@Override
public void setData(byte[] data, DecompilationContext dc) {
this.index = (int) ByteToolkit.getLong(data, 1, 2, true);
}
@Override
public byte[] getData(DecompilationContext dc) {
ByteSerializer ser = new ByteSerializer(true);
ser.addByte(OPCODE);
ser.addShort(this.index);
return ser.getBytes();
}
@Override
public Parameters getParameters() {
Parameters params = getParameterTypes();
params.addValue(this.index);
return params;
}
@Override
public Parameters getParameterTypes() {
return new Parameters(
new ParameterType[] { ParameterType.TYPE_CONSTANT_POOL_CONSTANT });
}
@Override
public void setParameters(Parameters params) {
this.index = params.getInt(0);
}
@Override
public List<StackElement> getPushedElements(DecompilationContext dc) {
List<StackElement> elements = new ArrayList<StackElement>();
ConstantPoolInfo cpi = dc.getConstantPool().get(this.index);
if (cpi instanceof DoubleInfo) {
elements.add(new StackElement("value", StackElementType.DOUBLE));
} else if (cpi instanceof LongInfo) {
elements.add(new StackElement("value", StackElementType.LONG));
} else {
throw new AssertionError("ldc2_w points to an invalid item on the constant pool: " + cpi.getClass());
}
return elements;
}
}