abstractprogram.java~7~

来自「Java源码」· JAVA~7~ 代码 · 共 45 行

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.Vector;
import AM.vm_impl.util.Tracer;

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++;
    }
}