1 

     2 /*

     3  * Copyright (c) 2006, 2012, Oracle and/or its affiliates. All rights reserved.

     4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     5  *

     6  * This code is free software; you can redistribute it and/or modify it

     7  * under the terms of the GNU General Public License version 2 only, as

     8  * published by the Free Software Foundation.  Oracle designates this

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

    10  * by Oracle in the LICENSE file that accompanied this code.

    11  *

    12  * This code is distributed in the hope that it will be useful, but WITHOUT

    13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    15  * version 2 for more details (a copy is included in the LICENSE file that

    16  * accompanied this code).

    17  *

    18  * You should have received a copy of the GNU General Public License version

    19  * 2 along with this work; if not, write to the Free Software Foundation,

    20  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    21  *

    22  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    23  * or visit www.oracle.com if you need additional information or have any

    24  * questions.

    25  */

    26 

    27 /*

    28  */

    29 

    30 package sun.nio.cs.ext;

    31 

    32 import java.nio.ByteBuffer;

    33 import java.nio.charset.Charset;

    34 import java.nio.charset.CharsetDecoder;

    35 import java.nio.charset.CharsetEncoder;

    36 import java.nio.charset.CoderResult;

    37 import sun.nio.cs.DoubleByte;

    38 import static sun.nio.cs.CharsetMapping.*;

    39 

    40 // EBCDIC DBCS-only Korean

    41 public class IBM834 extends Charset

    42 {

    43     public IBM834() {

    44         super("x-IBM834", ExtendedCharsets.aliasesFor("x-IBM834"));

    45     }

    46 

    47     public boolean contains(Charset cs) {

    48         return (cs instanceof IBM834);

    49     }

    50 

    51     public CharsetDecoder newDecoder() {

    52         IBM933.initb2c();

    53         return new DoubleByte.Decoder_DBCSONLY(

    54             this, IBM933.b2c, null, 0x40, 0xfe);  // hardcode the b2min/max

    55     }

    56 

    57     public CharsetEncoder newEncoder() {

    58         IBM933.initc2b();

    59         return new Encoder(this);

    60     }

    61 

    62     protected static class Encoder extends DoubleByte.Encoder_DBCSONLY {

    63         public Encoder(Charset cs) {

    64             super(cs, new byte[] {(byte)0xfe, (byte)0xfe},

    65                   IBM933.c2b, IBM933.c2bIndex, false);

    66         }

    67 

    68         public int encodeChar(char ch) {

    69             int bb = super.encodeChar(ch);

    70             if (bb == UNMAPPABLE_ENCODING) {

    71                 // Cp834 has 6 additional non-roundtrip char->bytes

    72                 // mappings, see#6379808

    73                 if (ch == '\u00b7') {

    74                     return 0x4143;

    75                 } else if (ch == '\u00ad') {

    76                     return 0x4148;

    77                 } else if (ch == '\u2015') {

    78                     return 0x4149;

    79                 } else if (ch == '\u223c') {

    80                     return 0x42a1;

    81                 } else if (ch == '\uff5e') {

    82                     return 0x4954;

    83                 } else if (ch == '\u2299') {

    84                     return 0x496f;

    85                 }

    86             }

    87             return bb;

    88         }

    89 

    90         public boolean isLegalReplacement(byte[] repl) {

    91             if (repl.length == 2 &&

    92                 repl[0] == (byte)0xfe && repl[1] == (byte)0xfe)

    93                 return true;

    94             return super.isLegalReplacement(repl);

    95         }

    96 

    97     }

    98 }