/* 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.util.ByteSerializer;
import net.sf.rej.util.ByteToolkit;
/**
* Branch always.
*
* @author Sami Koivu
*/
public class _goto extends Instruction {
public static final int OPCODE = 0xa7;
public static final String MNEMONIC = "goto";
private static final int SIZE = 3;
private Label label = null;
public _goto() {
this.label = new Label(0);
}
public _goto(Label label) {
this.label = label;
}
@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) {
int addr = (int) ByteToolkit.getSignedLong(data, 1, 2, true)
+ dc.getPosition();
this.label = new Label(addr);
}
@Override
public byte[] getData(DecompilationContext dc) {
ByteSerializer ser = new ByteSerializer(true);
ser.addByte(OPCODE);
ser.addShort(this.label.getPosition() - dc.getPosition());
return ser.getBytes();
}
@Override
public List<Label> getLabels() {
List<Label> al = new ArrayList<Label>();
al.add(this.label);
return al;
}
@Override
public Parameters getParameters() {
Parameters params = getParameterTypes();
params.addValue(this.label);
return params;
}
@Override
public Parameters getParameterTypes() {
return new Parameters(new ParameterType[] { ParameterType.TYPE_LABEL });
}
@Override
public void setParameters(Parameters params) {
this.label = (Label) params.getObject(0);
}
}