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3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
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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).
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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 }