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 

    26 package sun.nio.cs.ext;

    27 

    28 import java.nio.charset.Charset;

    29 import java.nio.charset.CharsetDecoder;

    30 import java.nio.charset.CharsetEncoder;

    31 import java.util.Arrays;

    32 import sun.nio.cs.DoubleByte;

    33 import sun.nio.cs.HistoricallyNamedCharset;

    34 

    35 public class IBM943C extends Charset implements HistoricallyNamedCharset

    36 {

    37 

    38     public IBM943C() {

    39         super("x-IBM943C", ExtendedCharsets.aliasesFor("x-IBM943C"));

    40     }

    41 

    42     public String historicalName() {

    43         return "Cp943C";

    44     }

    45 

    46     public boolean contains(Charset cs) {

    47         return ((cs.name().equals("US-ASCII"))

    48                 || (cs instanceof IBM943C));

    49     }

    50 

    51     public CharsetDecoder newDecoder() {

    52         return new DoubleByte.Decoder(this,

    53                                       IBM943.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         IBM943.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] = IBM943.b2cSB[i];

    75         }

    76 

    77         IBM943.initc2b();

    78         c2b = Arrays.copyOf(IBM943.c2b, IBM943.c2b.length);

    79         c2bIndex = Arrays.copyOf(IBM943.c2bIndex, IBM943.c2bIndex.length);

    80         for (char c = '\0'; c < '\u0080'; ++c) {

    81             int index = c2bIndex[c >> 8];

    82             c2b[index + (c & 0xff)] = c;

    83         }

    84     }

    85 }