Package net.sf.rej.java.instruction

Source Code of net.sf.rej.java.instruction._sipush

/* 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;

/**
* Push short.
*
* @author Sami Koivu
*/
public class _sipush extends Instruction {

  public static final int OPCODE = 0x11;

  public static final String MNEMONIC = "sipush";

  private static final int SIZE = 3;

  private int value = 0;

  public _sipush() {
  }

  @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.value = (int) ByteToolkit.getLong(data, 1, 2, true);
  }

  @Override
  public byte[] getData(DecompilationContext dc) {
    ByteSerializer ser = new ByteSerializer(true);
    ser.addByte(OPCODE);
    ser.addShort(this.value);
    return ser.getBytes();
  }

  @Override
  public Parameters getParameterTypes() {
    Parameters params = new Parameters();
    params.addParam(ParameterType.TYPE_CONSTANT_WIDE);
    return params;
  }

  @Override
  public Parameters getParameters() {
    Parameters params = getParameterTypes();
    params.addValue(this.value);
    return params;
  }

  @Override
  public void setParameters(Parameters params) {
    this.value = params.getInt(0);
  }

  @Override
  public List<StackElement> getPushedElements(DecompilationContext dc) {
    List<StackElement> elements = new ArrayList<StackElement>();
    elements.add(new StackElement("value", StackElementType.INT));
    return elements;
  }

}
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