/* OpenLogViewer
    *
    * Copyright 2011
    *
    * This file is part of the OpenLogViewer project.
    *
    * OpenLogViewer software 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 3 of the License, or
   * (at your option) any later version.
   *
   * OpenLogViewer software 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 any OpenLogViewer software.  If not, see http://www.gnu.org/licenses/
   *
   * I ask that if you make any changes to this file you fork the code on github.com!
   *
   */
  
  package org.diyefi.openlogviewer.utils;
  
  import java.io.BufferedInputStream;
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  
  
  public final class Utilities {
  	/**
  	 * Prevent instantiation.
  	 */
  	private Utilities() {
  	}
  
  	public static String getExtension(final File f) {
  		String ext = null;
  		final String s = f.getName();
  		final int i = s.lastIndexOf('.');
  
  		if (i > 0 && i < s.length() - 1) {
  			ext = s.substring(i + 1).toLowerCase();
  		}
  		return ext;
  	}
  
  	public static int countBytes(final File f, final byte b) throws IOException {
  		InputStream is = new BufferedInputStream(new FileInputStream(f));
  		try {
  			byte[] data = new byte[8192];
  			int lines = 0;
  			int readCount = 0;
  			boolean empty = true;
  			while ((readCount = is.read(data)) != -1) {
  				empty = false;
  				for (int i = 0; i < readCount; ++i) {
  					if (data[i] == b) {
  						lines++;
  					}
  				}
  			}
  			return (lines == 0 && !empty) ? 1 : lines;
  		} finally {
  			is.close();
  		}
  	}
  
  }