001/**
002 *
003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
004 *
005 * This library is free software; you can redistribute it and/or
006 * modify it under the terms of the GNU Lesser General Public
007 * License as published by the Free Software Foundation; either 
008 * version 2.1 of the License, or (at your option) any later version.
009 * 
010 * This library is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013 * Lesser General Public License for more details.
014 * 
015 * You should have received a copy of the GNU Lesser General Public 
016 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
017 * 
018 **/
019/**
020 * Implements the CFML Function chr
021 */
022package lucee.runtime.functions.string;
023
024import lucee.runtime.PageContext;
025import lucee.runtime.exp.ExpressionException;
026import lucee.runtime.ext.function.Function;
027
028public final class Chr implements Function {
029
030        private static final long serialVersionUID = -4941617303146860984L;
031
032        public static String call(PageContext pc , double number) throws ExpressionException {
033                int value=(int) number;
034                if(value<1){
035                        if(value==0)return "";
036                        //else {
037                                throw new ExpressionException("Parameter 1 of function chr which is now ["+value+"] must be a non-negative integer");
038                        //}
039                }
040                return ""+(char)value;          
041        }
042}