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;
34
35public class IBM949C extends Charset implements HistoricallyNamedCharset
36{
37
38    public IBM949C() {
39        super("x-IBM949C", ExtendedCharsets.aliasesFor("x-IBM949C"));
40    }
41
42    public String historicalName() {
43        return "Cp949C";
44    }
45
46    public boolean contains(Charset cs) {
47        return ((cs.name().equals("US-ASCII"))
48                || (cs instanceof IBM949C));
49    }
50
51    public CharsetDecoder newDecoder() {
52        return new DoubleByte.Decoder(this,
53                                      IBM949.b2c,
54                                      b2cSB,
55                                      0xa1,
56                                      0xfe);
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        IBM949.initb2c();
69        b2cSB = new char[0x100];
70        for (int i = 0; i < 0x80; i++) {
71            b2cSB[i] = (char)i;
72        }
73        for (int i = 0x80; i < 0x100; i++) {
74            b2cSB[i] = IBM949.b2cSB[i];
75        }
76        IBM949.initc2b();
77        c2b = Arrays.copyOf(IBM949.c2b, IBM949.c2b.length);
78        c2bIndex = Arrays.copyOf(IBM949.c2bIndex, IBM949.c2bIndex.length);
79        for (char c = '\0'; c < '\u0080'; ++c) {
80            int index = c2bIndex[c >> 8];
81            c2b[index + (c & 0xff)] = c;
82        }
83    }
84}
85