abstractprogram.java

Java源码

package AM.am_data_structure;

/**
 * Created by IntelliJ IDEA. User: yellowicq Date: 2004-4-27 Time: 12:25:10
 * To change this template use File | Settings | File Templates.
 */
import java.util.*;

import AM.vm_impl.util.*;

public abstract class AbstractProgram
    implements Program {
  public int CP;
  private Vector program; // A container of AbstractInstruction
  private InstructionSet instSet;

  public AbstractProgram(InstructionSet instSet) {
    this.instSet = instSet;
  }

  public void Init() {
    CP = 0;
    program = new Vector();
  }

  public void LoadProgram(Stream assemblerCode) {
    // load instructions from the assembler code
    program = instSet.Resolve(assemblerCode);
    if (program == null) {
      throw new NullPointerException("Program load failed!");
    }
    Tracer.debug("Instruction in program[" + program.size() + "]:" +
                 program.toString());
  }

  public Instruction CurrentInst() {
    return (Instruction) program.get(CP);
  }

  abstract public boolean Stop();

  public void Next() {
    CP++;
  }
}