1/*
2 * Copyright (c) 2003, 2004, 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
26package sun.nio.cs.ext;
27
28import java.nio.charset.Charset;
29import java.nio.charset.CharsetDecoder;
30import java.nio.charset.CharsetEncoder;
31import java.util.Arrays;
32import sun.nio.cs.DoubleByte;
33import sun.nio.cs.HistoricallyNamedCharset;
34import static sun.nio.cs.CharsetMapping.*;
35
36public class IBM942C extends Charset implements HistoricallyNamedCharset
37{
38    public IBM942C() {
39        super("x-IBM942C", ExtendedCharsets.aliasesFor("x-IBM942C"));
40    }
41
42    public String historicalName() {
43        return "Cp942C";
44    }
45
46    public boolean contains(Charset cs) {
47        return ((cs.name().equals("US-ASCII"))
48                || (cs instanceof IBM942C));
49    }
50
51    public CharsetDecoder newDecoder() {
52        return new DoubleByte.Decoder(this,
53                                      IBM942.b2c,
54                                      b2cSB,
55                                      0x40,
56                                      0xfc);
57    }
58
59    public CharsetEncoder newEncoder() {
60        return new DoubleByte.Encoder(this, c2b, c2bIndex);
61    }
62
63    final static char[] b2cSB;
64    final static char[] c2b;
65    final static char[] c2bIndex;
66
67    static {
68        IBM942.initb2c();
69
70        // the mappings need udpate are
71        //    u+001a  <-> 0x1a
72        //    u+001c  <-> 0x1c
73        //    u+005c  <-> 0x5c
74        //    u+007e  <-> 0x7e
75        //    u+007f  <-> 0x7f
76
77        b2cSB = Arrays.copyOf(IBM942.b2cSB, IBM942.b2cSB.length);
78        b2cSB[0x1a] = 0x1a;
79        b2cSB[0x1c] = 0x1c;
80        b2cSB[0x5c] = 0x5c;
81        b2cSB[0x7e] = 0x7e;
82        b2cSB[0x7f] = 0x7f;
83
84        IBM942.initc2b();
85        c2b = Arrays.copyOf(IBM942.c2b, IBM942.c2b.length);
86        c2bIndex = Arrays.copyOf(IBM942.c2bIndex, IBM942.c2bIndex.length);
87        c2b[c2bIndex[0] + 0x1a] = 0x1a;
88        c2b[c2bIndex[0] + 0x1c] = 0x1c;
89        c2b[c2bIndex[0] + 0x5c] = 0x5c;
90        c2b[c2bIndex[0] + 0x7e] = 0x7e;
91        c2b[c2bIndex[0] + 0x7f] = 0x7f;
92    }
93}
94