iddescriptor.java

用Java实现的编译器。把源代码编译成SPARC汇编程序

package CatDecaf.SymTable;
public class IDDescriptor extends Descriptor{
	
	
	boolean isArray, fieldD, paramD, initialized;
	int arraySize;
	
	public IDDescriptor(String n, int t){
		name = n; type = t; fieldD = false;
	}
	public IDDescriptor(String n, int t, int s){
		name = n; type = t; fieldD = false; paramD = false; initialized = false;
		isArray = true; arraySize = s;
		if(s <= 0){
			System.err.println(parser.parser.infile+":" + parser.Scanner.lineno + 
				": invalid array declaration; '" + SymbolTable.getTypeName(t) + " " + n + "[" + s + "]'");
			ClassProgram.numOfError++;
		}
	}
	public boolean isGlobal(){
		return fieldD;
	}
	public void assertFieldDescriptor(){
		this.fieldD = true; initialized = true;
	}
	public boolean isParam(){
		return paramD;
	}
	public void assertParamDescriptor(){
		this.paramD = true; initialized = true;
	}
	public void assertInitialized(){
		initialized = true;
	}
	public boolean isInitialized(){
		return initialized;
	}
	public void setOffset(int i){
		this.offset = i;
	}
	public boolean isArrayType(){
		return isArray;
	}
	public int getArraySize(){
		return arraySize;
	}
	public void pPrint(){
		String stype;
		if(type == parser.sym.INT) stype = "int";
		else if(type == parser.sym.BOOLEAN) stype = "boolean";
		else stype = "Error: unidentified type";
		if(isArray)
			System.out.print(stype + " " + name + "[" + arraySize + "]" + "(" + offset + ")  ");
		else System.out.print(stype + " " + name + "(" + offset + ")" + "   ");
	}
	public String toString(){
		String stype;
		if(type == parser.sym.INT) stype = "int";
		else if(type == parser.sym.BOOLEAN) stype = "boolean";
		else stype = "Error: unidentified type";
		if(isArray)
			return stype + " " + name + "[" + arraySize + "]" ;
		else return stype + " " + name;
	}
		
}