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 **/
019package lucee.runtime.functions.file;
020
021import lucee.runtime.PageContext;
022import lucee.runtime.exp.FunctionException;
023import lucee.runtime.exp.PageException;
024import lucee.runtime.op.Caster;
025
026public class FileSkipBytes {
027
028
029        
030        public static String call(PageContext pc, Object fileObj, double len) throws PageException {
031                
032                if(!(fileObj instanceof FileStreamWrapper)) 
033                        throw new FunctionException(pc,"FileSkipBytes",1,"fileObj",
034                                        "invalid type ["+Caster.toTypeName(fileObj)+"], only File Object produced by FileOpen supported");
035                FileStreamWrapper fs=(FileStreamWrapper) fileObj;
036                fs.skip((int)len);
037                return null;
038                
039        }
040        
041}