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
30package sun.nio.cs.ext;
31
32import java.nio.ByteBuffer;
33import java.nio.charset.Charset;
34import java.nio.charset.CharsetDecoder;
35import java.nio.charset.CharsetEncoder;
36import java.nio.charset.CoderResult;
37import sun.nio.cs.DoubleByte;
38import static sun.nio.cs.CharsetMapping.*;
39
40// EBCDIC DBCS-only Korean
41public 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}
99