/**
 * ===========================================
 * LibFonts : a free Java font reading library
 * ===========================================
 *
 * Project Info:  http://reporting.pentaho.org/libfonts/
 *
 * (C) Copyright 2006-2007, by Pentaho Corporation and Contributors.
 *
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * ------------
 * $Id: LEByteAccessUtilities.java 3523 2007-10-16 11:03:09Z tmorgner $
 * ------------
 * (C) Copyright 2006-2007, by Pentaho Corporation.
 */

package org.jfree.fonts;

/**
 * Reads byte-data using a Little-Endian access schema. Little-Endian is used for Type1 fonts.
 *
 * @author Thomas Morgner
 */
public class LEByteAccessUtilities
{
  private LEByteAccessUtilities()
  {
  }

  public static int readUShort (final byte[] data, final int pos)
  {
    return ((data[pos + 1] & 0xff) << 8) | (data[pos] & 0xff);
  }

  public static long readULong (final byte[] data, final int pos)
  {
    final int c1 = (data[pos] & 0xff);
    final int c2 = (data[pos + 1] & 0xff);
    final int c3 = (data[pos + 2] & 0xff);
    final int c4 = (data[pos + 3] & 0xff);

    long retval = ((long) c4 << 24);
    retval |= (long)c3 << 16;
    retval |= (long)c2 << 8;
    retval |= (long)c1;
    return retval;
  }

  public static long readLongDateTime (final byte[] data, final int pos)
  {
    final int c1 = (data[pos] & 0xff);
    final int c2 = (data[pos + 1] & 0xff);
    final int c3 = (data[pos + 2] & 0xff);
    final int c4 = (data[pos + 3] & 0xff);
    final int c5 = (data[pos + 4] & 0xff);
    final int c6 = (data[pos + 5] & 0xff);
    final int c7 = (data[pos + 6] & 0xff);
    final int c8 = (data[pos + 7] & 0xff);

    long retval = ((long) c8 << 56);
    retval |= (long)c7 << 48;
    retval |= (long)c6 << 40;
    retval |= (long)c5 << 32;
    retval |= (long)c4 << 24;
    retval |= (long)c3 << 16;
    retval |= (long)c2 << 8;
    retval |= (long)c1;
    return retval;
  }

  public static short readShort (final byte[] data, final int pos)
  {
    return (short) ((data[pos + 1] & 0xff) << 8 | (data[pos] & 0xff));
  }

  public static int readLong (final byte[] data, final int pos)
  {
    int retval = 0;
    retval |= (long)(data[pos + 3] & 0xff) << 24;
    retval |= (long)(data[pos + 2] & 0xff) << 16;
    retval |= (long)(data[pos + 1] & 0xff) << 8;
    retval |= (long)(data[pos ] & 0xff);
    return retval;
  }

}