/*
* $Id: XorNode.java,v 1.5 2002/09/16 08:05:05 jkl Exp $
*
* Copyright (c) 2002 Njet Communications Ltd. All Rights Reserved.
*
* Use is subject to license terms, as defined in
* Anvil Sofware License, Version 1.1. See LICENSE
* file, or http://njet.org/license-1.1.txt
*/
package anvil.script.expression;
import anvil.core.Any;
import anvil.codec.Code;
import anvil.codec.ConstantPool;
import anvil.codec.Source;
import anvil.script.compiler.ByteCompiler;
import anvil.script.Context;
import java.io.IOException;
/**
* class XorNode
*
* @author: Jani Lehtim�ki
*/
public class XorNode extends BinaryParent
{
public XorNode(Node left, Node right)
{
super(left,right);
}
public int typeOf()
{
return Node.EXPR_XOR;
}
public Any eval()
{
boolean a = _left.eval().toBoolean();
boolean b = _right.eval().toBoolean();
return a != b ? Any.TRUE : Any.FALSE;
}
public void compile(ByteCompiler context, int operation)
{
super.compile(context, GET_BOOLEAN);
Code code = context.getCode();
ConstantPool pool = code.getPool();
Source notequal = code.if_icmpne();
if (operation == GET_BOOLEAN) {
code.iconst(false);
} else {
code.getstatic(pool.addFieldRef(context.TYPE_ANY, "FALSE", "Lanvil/core/Any;"));
}
Source toend = code.go_to();
notequal.bind();
if (operation == GET_BOOLEAN) {
code.iconst(true);
} else {
code.getstatic(pool.addFieldRef(context.TYPE_ANY, "TRUE", "Lanvil/core/Any;"));
}
toend.bind();
}
}