xtype_function.java

一个在无线传感器网络的编译器

// $Id: Xtype_function.java,v 1.5 2006/01/03 23:50:52 idgay Exp $
/*									tab:4
 * Copyright (c) 2004-2005 Intel Corporation
 * All rights reserved.
 *
 * This file is distributed under the terms in the attached INTEL-LICENSE     
 * file. If you do not find these files, copies can be found by writing to
 * Intel Research Berkeley, 2150 Shattuck Avenue, Suite 1300, Berkeley, CA, 
 * 94704.  Attention:  Intel License Inquiry.
 */

package net.tinyos.nesc.dump.xml;

import org.xml.sax.*;
import java.util.*;

/**
 * A function type.
 */
public class Xtype_function extends Type
{
    /**
     * Parameters of the function. null iff oldstyle is true.
     */
    public LinkedList/*Type*/ parameters;

    /**
     * Return type of this function.
     */
    public Type returns;

    /**
     * True for variable-argument functions (e.g., printf).
     */
    public boolean varargs;

    /**
     * True for old-style function types (no parameter types specified).
     */
    public boolean oldstyle;

    public NDElement start(Attributes attrs) {
	super.start(attrs);
	varargs = boolDecode(attrs.getValue("varargs"));
	oldstyle = boolDecode(attrs.getValue("oldstyle"));
	return this;
    }

    public void child(NDElement subElement) {
	if (subElement instanceof Type)
	    returns = (Type)subElement;
	if (subElement instanceof Xfunction_parameters)
	    parameters = ((Xfunction_parameters)subElement).l;
	super.child(subElement);
    }

    public boolean equals(Object obj) {
	if (!(obj instanceof Xtype_function))
	    return false;
	Xtype_function other = (Xtype_function)obj;

	if (!returns.equals(other.returns))
	    return false;
	if (oldstyle || other.oldstyle)
	    return oldstyle == other.oldstyle;
	return varargs == other.varargs && parameters.equals(other.parameters);
    }
}