/*

 * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package sun.nio.cs.ext;

import java.nio.charset.Charset;

import java.nio.charset.CharsetDecoder;

import java.nio.charset.CharsetEncoder;

import java.util.Arrays;

import sun.nio.cs.HistoricallyNamedCharset;

public class IBM943C extends Charset implements HistoricallyNamedCharset

{

    public IBM943C() {

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

    }

    public String historicalName() {

        return "Cp943C";

    }

    public boolean contains(Charset cs) {

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

                || (cs instanceof IBM943C));

    }

    public CharsetDecoder newDecoder() {

        return new DoubleByte.Decoder(this,

                                      IBM943.b2c,

                                      b2cSB,

                                      0x40,

                                      0xfc);

    }

    public CharsetEncoder newEncoder() {

        return new DoubleByte.Encoder(this, c2b, c2bIndex);

    }

    final static char[] b2cSB;

    final static char[] c2b;

    final static char[] c2bIndex;

    static {

        IBM943.initb2c();

        b2cSB = new char[0x100];

        for (int i = 0; i < 0x80; i++) {

            b2cSB[i] = (char)i;

        }

        for (int i = 0x80; i < 0x100; i++) {

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

        }

        IBM943.initc2b();

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

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

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

            int index = c2bIndex[c >> 8];

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

        }

    }

}