1 /*
   2  * Copyright (c) 2008, 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.CharsetEncoder;
  30 import java.nio.charset.CharsetDecoder;
  31 import static sun.nio.cs.CharsetMapping.*;
  32 
  33 public class MS932_0213 extends Charset {
  34     public MS932_0213() {
  35         super("x-MS932_0213", ExtendedCharsets.aliasesFor("MS932_0213"));
  36     }
  37 
  38     public boolean contains(Charset cs) {
  39         return ((cs.name().equals("US-ASCII"))
  40                 || (cs instanceof MS932)
  41                 || (cs instanceof MS932_0213));
  42     }
  43 
  44     public CharsetDecoder newDecoder() {
  45         return new Decoder(this);
  46     }
  47 
  48     public CharsetEncoder newEncoder() {
  49         return new Encoder(this);
  50     }
  51 
  52     protected static class Decoder extends SJIS_0213.Decoder {
  53         static DoubleByte.Decoder decMS932 =
  54             (DoubleByte.Decoder)new MS932().newDecoder();
  55         protected Decoder(Charset cs) {
  56             super(cs);
  57         }
  58 
  59         protected char decodeDouble(int b1, int b2) {
  60             char c = decMS932.decodeDouble(b1, b2);
  61             if (c == UNMAPPABLE_DECODING)
  62                 return super.decodeDouble(b1, b2);
  63             return c;
  64         }
  65     }
  66 
  67     protected static class Encoder extends SJIS_0213.Encoder {
  68         // we only use its encodeChar() method
  69         static DoubleByte.Encoder encMS932 =
  70             (DoubleByte.Encoder)new MS932().newEncoder();
  71         protected Encoder(Charset cs) {
  72             super(cs);
  73         }
  74 
  75         protected int encodeChar(char ch) {
  76             int db = encMS932.encodeChar(ch);
  77             if (db == UNMAPPABLE_ENCODING)
  78                 return super.encodeChar(ch);
  79             return db;
  80         }
  81     }
  82 }