content: /*
   * Copyright (c) 2017, Andreas Fagschlunger. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   *   - Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *
   *   - Redistributions in binary form must reproduce the above copyright
   *     notice, this list of conditions and the following disclaimer in the
   *     documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
   * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package at.o2xfs.xfs.util;
  
  /**
   * @author Andreas Fagschlunger
   */
  public class XFSUtils {
  
  	public static int getVersionsRequired(String lowestVersion, String highestVersion) {
  		int versionsRequired = getVersion(lowestVersion);
  		versionsRequired <<= 16;
  		versionsRequired |= getVersion(highestVersion);
  		return versionsRequired;
  	}
  
  	public static int getVersion(String version) {
  		int result = 0;
  		int endIndex = version.indexOf('.');
  		if (endIndex >= 0) {
  			String minorVersion = version.substring(endIndex + 1);
  			if (minorVersion.length() > 0) {
  				try {
  					int minor = Integer.parseInt(minorVersion);
  					if (minor < 0 || minor > 255) {
  						throw new IllegalArgumentException("Minor version out of range. Value:\"" + minor + "\"");
  					}
  					minor <<= 8;
  					result |= minor;
  				} catch (NumberFormatException e) {
  					e.printStackTrace();
  				}
  			}
  		} else {
  			endIndex = version.length();
  		}
  		String majorVersion = version.substring(0, endIndex);
  		if (majorVersion.length() > 0) {
  			int major = Integer.parseInt(majorVersion);
  			if (major < 0 || major > 255) {
  				throw new IllegalArgumentException("Major version out of range. Value:\"" + majorVersion + "\"");
  			}
  			result |= (major & 0xFF);
  		}
  		return result;
  	}
  
  	public static String getVersionAsString(int i) {
  		String v = Integer.toString(i & 0xFF);
  		return v + "." + Integer.toString((i) >>> 8);
  	}
  }