1/*
2 * Copyright (c) 2002, 2006, 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/*
27 */
28
29package sun.nio.cs.ext;
30
31import java.nio.charset.Charset;
32import java.nio.ByteBuffer;
33import java.nio.CharBuffer;
34import java.nio.charset.CharsetDecoder;
35import java.nio.charset.CharsetEncoder;
36import java.nio.charset.CoderResult;
37import sun.nio.cs.*;
38import sun.nio.cs.HistoricallyNamedCharset;
39
40public class ISO2022_CN_GB extends ISO2022 implements HistoricallyNamedCharset
41{
42    public ISO2022_CN_GB() {
43        super("x-ISO-2022-CN-GB",
44               ExtendedCharsets.aliasesFor("x-ISO-2022-CN-GB"));
45    }
46
47    public boolean contains(Charset cs) {
48        // overlapping repertoire of EUC_CN, GB2312
49        return ((cs instanceof EUC_CN) ||
50                (cs.name().equals("US-ASCII")) ||
51                (cs instanceof ISO2022_CN_GB));
52    }
53
54    public String historicalName() {
55        return "ISO2022CN_GB";
56    }
57
58    public CharsetDecoder newDecoder() {
59        return new ISO2022_CN.Decoder(this);
60    }
61
62    public CharsetEncoder newEncoder() {
63        return new Encoder(this);
64    }
65
66    private static class Encoder extends ISO2022.Encoder {
67
68        public Encoder(Charset cs)
69        {
70            super(cs);
71            SODesig = new byte[] { '$', ')', 'A'};
72
73            try {
74                Charset cset = Charset.forName("EUC_CN"); // GB2312
75                ISOEncoder = cset.newEncoder();
76            } catch (Exception e) { }
77        }
78
79        /*
80         * Since ISO2022-CN-GB possesses a CharsetEncoder
81         * without the corresponding CharsetDecoder half the
82         * default replacement check needs to be overridden
83         * since the parent class version attempts to
84         * decode 0x3f (?).
85         */
86
87        public boolean isLegalReplacement(byte[] repl) {
88            // 0x3f is OK as the replacement byte
89            return (repl.length == 1 && repl[0] == (byte) 0x3f);
90        }
91    }
92}
93