quadruple.java

来自「北航编译原理课程设计成果——一个扩充的C0文法编译器」· Java 代码 · 共 141 行

package cn.edu.buaa.scse.liyi.test;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 * 
 * @author liyi
 */
public class Quadruple
{
	public int op;						//操作符
	public String first;				//第一操作数
	public String last;					//第二操作数
	public String result;				//结果
	
	public Quadruple(int op,String first,String last,String result)
	{
		this.first=first;
		this.last=last;
		this.op=op;
		this.result=result;
	}
	
	public Quadruple(Quadruple get)
	{
		this.first=get.first;
		this.last=get.last;
		this.op = get.op;
		this.result=get.result;	
	}
	
	@Override
    public String toString()
    {
		String ss=new String();
		String cc=new String();
		if(this.op==1)
		{
			ss="ADD";
			cc=this.first;
		}
		else if(this.op==2)
		{
			ss="SUB";
			cc=this.first;
		}
		else if(this.op==3)
		{
			ss="MUL";
			cc=this.first;
		}
		else if(this.op==4)
		{
			ss="DIV";
			cc=this.first;
		}
		else if(this.op==Compile.CONDITION)
		{
			ss="condition";
			if(this.first.equals("24"))
			{
				cc="G";
			}
			else if(this.first.equals("25"))
			{
				cc="L";
			}
			else if(this.first.equals("26"))
			{
				cc="GE";
			}
			else if(this.first.equals("27"))
			{
				cc="LE";
			}
			else if(this.first.equals("28"))
			{
				cc="NE";
			}
			else if(this.first.equals("29"))
			{
				cc="EE";
			}
		}
		else if(this.op==5)
		{
			ss="MOV";
			cc=this.first;
		}
		else if(this.op==6)
		{
			ss="STAMP";
			cc=this.first;
		}
		else if(this.op==7)
		{
			ss="J";
			cc=this.first;
		}
		else if(this.op==8)
		{
			ss="JFALSE";
			cc=this.first;
		}
		else if(this.op==13)
		{
			ss="PRINTF";
			cc=this.first;
		}
		else if(this.op==10)
		{
			ss="CMP";
			cc=this.first;
		}
		else if(this.op==11)
		{
			ss="PUSHPARA";
			cc=this.first;
		}
		else if(this.op==12)
		{
			ss="CALL";
			cc=this.first;
		}
		else if(this.op==14)
		{
			ss="SCANF";
			cc=this.first;
		}
		else if(this.op==15)
		{
			ss="RETURN";
			cc=this.first;
		}
		return (ss+"\t"+cc+"\t"+this.last+"\t"+this.result);
	}
}