text: /*
   * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Oracle in the LICENSE file that accompanied this code.
   *
   * This code 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
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  package sun.text;
  
  /**
   * SupplementaryCharacterData is an SMI-private class which was written for
   * RuleBasedBreakIterator and BreakDictionary.
   */
  public final class SupplementaryCharacterData implements Cloneable {
  
      /**
       * A token used as a character-category value to identify ignore characters
       */
      private static final byte IGNORE = -1;
  
      /**
       * An array for supplementary characters and values.
       * Lower one byte is used to keep a byte-value.
       * Upper three bytes are used to keep the first supplementary character
       * which has the value. The value is also valid for the following
       * supplementary characters until the next supplementary character in
       * the array <code>dataTable</code>.
       * For example, if the value of <code>dataTable[2]</code> is
       * <code>0x01000123</code> and the value of <code>dataTable[3]</code> is
       * <code>0x01000567</code>, supplementary characters from
       * <code>0x10001</code> to <code>0x10004</code> has the value
       * <code>0x23</code>. And, <code>getValue(0x10003)</code> returns the value.
       */
      private int[] dataTable;
  
  
      /**
       * Creates a new SupplementaryCharacterData object with the given table.
       */
      public SupplementaryCharacterData(int[] table) {
          dataTable = table;
      }
  
      /**
       * Returns a corresponding value for the given supplementary code-point.
       */
      public int getValue(int index) {
          // Index should be a valid supplementary character.
          assert index >= Character.MIN_SUPPLEMENTARY_CODE_POINT &&
                 index <= Character.MAX_CODE_POINT :
                 "Invalid code point:" + Integer.toHexString(index);
  
          int i = 0;
          int j = dataTable.length - 1;
          int k;
  
          for (;;) {
              k = (i + j) / 2;
  
              int start = dataTable[k] >> 8;
              int end   = dataTable[k+1] >> 8;
  
              if (index < start) {
                  j = k;
              } else if (index > (end-1)) {
                  i = k;
              } else {
                  int v = dataTable[k] & 0xFF;
                  return (v == 0xFF) ? IGNORE : v;
              }
          }
      }
  
      /**
       * Returns the data array.
       */
      public int[] getArray() {
          return dataTable;
      }
  
  }
  