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/* 
 * Copyright (C) 2002-2017 XimpleWare, [email protected]
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/*VTD-XML is protected by US patent 7133857, 7260652, an 7761459*/
/*All licenses to any parties in litigation with XimpleWare have been expressly terminated. No new license, and no renewal of any revoked license, 
 * is granted to those parties as a result of re-downloading software from this or any other website*/
package com.ximpleware;


/**
 * PathExpr implements the Path expression as defined
 * in XPath spec
 *
 */
public class PathExpr extends Expr {

	Expr fe;
	LocationPathExpr lpe;
	//boolean first_time;
	int evalState;
	//FastIntBuffer fib;
	intHash ih;
	
	//public int getPositon(){
	//	return fib.size();
	//}
	
	public PathExpr(Expr f, LocationPathExpr l){
		fe = f;
		lpe = l;
		//first_time = true;
		evalState = 0;
		//fib = new FastIntBuffer(8);
		ih = new intHash();
	}
	
	final public boolean evalBoolean(VTDNav vn) {
		boolean a = false;
		vn.push2();
		// record teh stack size
		int size = vn.contextStack2.size;
        try{	
			a = (evalNodeSet(vn) != -1);
		}catch (Exception e){
		}
		//rewind stack
		vn.contextStack2.size = size;
		reset(vn);
		vn.pop2();
		return a;
	}


	final public double evalNumber(VTDNav vn) {
		double d = Double.NaN;
		int a=0x7fffffff, k = -1;
        vn.push2();
        int size = vn.contextStack2.size;
        try {
        	while((k=evalNodeSet(vn))!=-1){
        		//a = evalNodeSet(vn);
        		if (k