1 /*

     2  * Copyright 2003-2004 Sun Microsystems, Inc.  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.  Sun designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    25 

    26 /*

    27  */

    28 

    29 package sun.nio.cs.ext;

    30 

    31 import java.nio.charset.Charset;

    32 import java.nio.charset.CharsetDecoder;

    33 import java.nio.charset.CharsetEncoder;

    34 import java.nio.charset.CharacterCodingException;

    35 import sun.nio.cs.HistoricallyNamedCharset;

    36 

    37 public class IBM942C extends Charset implements HistoricallyNamedCharset

    38 {

    39 

    40     public IBM942C() {

    41         super("x-IBM942C", ExtendedCharsets.aliasesFor("x-IBM942C"));

    42     }

    43 

    44     public String historicalName() {

    45         return "Cp942C";

    46     }

    47 

    48     public boolean contains(Charset cs) {

    49         return ((cs.name().equals("US-ASCII"))

    50                 || (cs instanceof IBM942C));

    51     }

    52 

    53     public CharsetDecoder newDecoder() {

    54         return new Decoder(this);

    55     }

    56 

    57     public CharsetEncoder newEncoder() {

    58         return new Encoder(this);

    59     }

    60 

    61     private static class Decoder extends IBM942.Decoder {

    62         protected static final String singleByteToChar;

    63 

    64         static {

    65           String indexs = "";

    66           for (char c = '\0'; c < '\u0080'; ++c) indexs += c;

    67               singleByteToChar = indexs +

    68                                  IBM942.Decoder.singleByteToChar.substring(indexs.length());

    69         }

    70 

    71         public Decoder(Charset cs) {

    72             super(cs, singleByteToChar);

    73         }

    74     }

    75 

    76     private static class Encoder extends IBM942.Encoder {

    77 

    78    protected static final short index1[];

    79    protected static final String index2a;

    80    protected static final int shift = 5;

    81 

    82         static {

    83 

    84             String indexs = "";

    85             for (char c = '\0'; c < '\u0080'; ++c) indexs += c;

    86                 index2a = IBM942.Encoder.index2a + indexs;

    87 

    88             int o = IBM942.Encoder.index2a.length() + 15000;

    89             index1 = new short[IBM942.Encoder.index1.length];

    90             System.arraycopy(IBM942.Encoder.index1, 0, index1, 0, IBM942.Encoder.index1.length);

    91 

    92             for (int i = 0; i * (1<<shift) < 128; ++i) {

    93                 index1[i] = (short)(o + i * (1<<shift));

    94             }

    95         }

    96 

    97         public Encoder(Charset cs) {

    98             super(cs, index1, index2a);

    99         }

   100     }

   101 }