1 /*
   2  * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.nio.cs.ext;
  27 
  28 import java.nio.charset.Charset;
  29 import java.nio.charset.CharsetDecoder;
  30 import java.nio.charset.CharsetEncoder;
  31 import java.util.Arrays;
  32 import sun.nio.cs.DoubleByte;
  33 import sun.nio.cs.HistoricallyNamedCharset;
  34 
  35 public class IBM949C extends Charset implements HistoricallyNamedCharset
  36 {
  37 
  38     public IBM949C() {
  39         super("x-IBM949C", ExtendedCharsets.aliasesFor("x-IBM949C"));
  40     }
  41 
  42     public String historicalName() {
  43         return "Cp949C";
  44     }
  45 
  46     public boolean contains(Charset cs) {
  47         return ((cs.name().equals("US-ASCII"))
  48                 || (cs instanceof IBM949C));
  49     }
  50 
  51     public CharsetDecoder newDecoder() {
  52         return new DoubleByte.Decoder(this,
  53                                       IBM949.b2c,
  54                                       b2cSB,
  55                                       0xa1,
  56                                       0xfe);
  57     }
  58 
  59     public CharsetEncoder newEncoder() {
  60         return new DoubleByte.Encoder(this, c2b, c2bIndex);
  61     }
  62 
  63     final static char[] b2cSB;
  64     final static char[] c2b;
  65     final static char[] c2bIndex;
  66 
  67     static {
  68         IBM949.initb2c();
  69         b2cSB = new char[0x100];
  70         for (int i = 0; i < 0x80; i++) {
  71             b2cSB[i] = (char)i;
  72         }
  73         for (int i = 0x80; i < 0x100; i++) {
  74             b2cSB[i] = IBM949.b2cSB[i];
  75         }
  76         IBM949.initc2b();
  77         c2b = Arrays.copyOf(IBM949.c2b, IBM949.c2b.length);
  78         c2bIndex = Arrays.copyOf(IBM949.c2bIndex, IBM949.c2bIndex.length);
  79         for (char c = '\0'; c < '\u0080'; ++c) {
  80             int index = c2bIndex[c >> 8];
  81             c2b[index + (c & 0xff)] = c;
  82         }
  83     }
  84 }