content: /* ***** BEGIN LICENSE BLOCK *****
   * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   *
   * The contents of this file are subject to the Mozilla Public License Version
   * 1.1 (the "License"); you may not use this file except in compliance with
   * the License. You may obtain a copy of the License at
   * http://www.mozilla.org/MPL/
   *
   * Software distributed under the License is distributed on an "AS IS" basis,
   * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
   * for the specific language governing rights and limitations under the
   * License.
   *
   * The Original Code is Mozilla Communicator client code.
   *
   * The Initial Developer of the Original Code is
   * Netscape Communications Corporation.
   * Portions created by the Initial Developer are Copyright (C) 1998
   * the Initial Developer. All Rights Reserved.
   *
   * Contributor(s):
   *   Kohei TAKETA <k-tak@void.in> (Java port)
   *
   * Alternatively, the contents of this file may be used under the terms of
   * either the GNU General Public License Version 2 or later (the "GPL"), or
   * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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   * ***** END LICENSE BLOCK ***** */
  
  package org.mozilla.universalchardet.prober.contextanalysis;
  
  
  public class EUCJPContextAnalysis extends JapaneseContextAnalysis {
      ////////////////////////////////////////////////////////////////
      // constants
      ////////////////////////////////////////////////////////////////
      public static final int HIRAGANA_HIGHBYTE = 0xA4;
      public static final int HIRAGANA_LOWBYTE_BEGIN = 0xA1;
      public static final int HIRAGANA_LOWBYTE_END = 0xF3;
      public static final int SINGLE_SHIFT_2 = 0x8E;
      public static final int SINGLE_SHIFT_3 = 0x8F;
      public static final int FIRSTPLANE_HIGHBYTE_BEGIN = 0xA1;
      public static final int FIRSTPLANE_HIGHBYTE_END = 0xFE;
      
  
      ////////////////////////////////////////////////////////////////
      // methods
      ////////////////////////////////////////////////////////////////
  	public EUCJPContextAnalysis() {
          super();
      }
  
      @Override
  	protected void getOrder(Order order, final byte[] buf, int offset) {
          order.order = -1;
          order.charLength = 1;
          
          int firstByte = buf[offset] & 0xFF;
          if (firstByte == SINGLE_SHIFT_2 ||
              (firstByte >= FIRSTPLANE_HIGHBYTE_BEGIN &&
               firstByte <= FIRSTPLANE_HIGHBYTE_END)) {
              order.charLength = 2;
          } else if (firstByte == SINGLE_SHIFT_3) {
              order.charLength = 3;
          }
          
          if (firstByte == HIRAGANA_HIGHBYTE) {
              int secondByte = buf[offset+1] & 0xFF;
              if (secondByte >= HIRAGANA_LOWBYTE_BEGIN &&
                  secondByte <= HIRAGANA_LOWBYTE_END) {
                  order.order = (secondByte - HIRAGANA_LOWBYTE_BEGIN);
              }
          }
      }
      
      @Override
  	protected int getOrder(final byte[] buf, int offset) {
          int highbyte = buf[offset] & 0xFF;
          if (highbyte == HIRAGANA_HIGHBYTE) {
              int lowbyte = buf[offset+1] & 0xFF;
              if (lowbyte >= HIRAGANA_LOWBYTE_BEGIN &&
                  lowbyte <= HIRAGANA_LOWBYTE_END) {
                  return (lowbyte - HIRAGANA_LOWBYTE_BEGIN);
              }
          }
          
          return -1;
      }
  }
  