1 /*
   2  * Copyright (c) 2002, 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 sun.nio.cs.HistoricallyNamedCharset;
  32 import static sun.nio.cs.CharsetMapping.*;
  33 
  34 public class MS950_HKSCS_XP extends Charset
  35 {
  36     public MS950_HKSCS_XP() {
  37         super("x-MS950-HKSCS-XP", ExtendedCharsets.aliasesFor("x-MS950-HKSCS-XP"));
  38     }
  39 
  40     public boolean contains(Charset cs) {
  41         return ((cs.name().equals("US-ASCII"))
  42                 || (cs instanceof MS950)
  43                 || (cs instanceof MS950_HKSCS_XP));
  44     }
  45 
  46     public CharsetDecoder newDecoder() {
  47         return new Decoder(this);
  48     }
  49 
  50     public CharsetEncoder newEncoder() {
  51         return new Encoder(this);
  52     }
  53 
  54     static class Decoder extends HKSCS.Decoder {
  55         private static DoubleByte.Decoder ms950 =
  56             (DoubleByte.Decoder)new MS950().newDecoder();
  57 
  58         /*
  59          * Note current decoder decodes 0x8BC2 --> U+F53A
  60          * ie. maps to Unicode PUA.
  61          * Unaccounted discrepancy between this mapping
  62          * inferred from MS950/windows-950 and the published
  63          * MS HKSCS mappings which maps 0x8BC2 --> U+5C22
  64          * a character defined with the Unified CJK block
  65          */
  66         private static char[][] b2cBmp = new char[0x100][];
  67         static {
  68             initb2c(b2cBmp, HKSCS_XPMapping.b2cBmpStr);
  69         }
  70 
  71         public char decodeDoubleEx(int b1, int b2) {
  72             return UNMAPPABLE_DECODING;
  73         }
  74 
  75         private Decoder(Charset cs) {
  76             super(cs, ms950, b2cBmp, null);
  77         }
  78     }
  79 
  80     private static class Encoder extends HKSCS.Encoder {
  81         private static DoubleByte.Encoder ms950 =
  82             (DoubleByte.Encoder)new MS950().newEncoder();
  83 
  84         /*
  85          * Note current encoder encodes U+F53A --> 0x8BC2
  86          * Published MS HKSCS mappings show
  87          * U+5C22 <--> 0x8BC2
  88          */
  89         static char[][] c2bBmp = new char[0x100][];
  90         static {
  91             initc2b(c2bBmp, HKSCS_XPMapping.b2cBmpStr, null);
  92         }
  93 
  94         public int encodeSupp(int cp) {
  95             return UNMAPPABLE_ENCODING;
  96         }
  97 
  98         private Encoder(Charset cs) {
  99             super(cs, ms950, c2bBmp, null);
 100         }
 101     }
 102 }