/*

 * Copyright (c) 2008, 2021, 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

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package sun.nio.cs.ext;

import java.nio.charset.Charset;

import java.nio.charset.CharsetEncoder;

import java.nio.charset.CharsetDecoder;

import sun.nio.cs.DoubleByte;

import sun.nio.cs.*;

import static sun.nio.cs.CharsetMapping.*;

public class MS932_0213 extends Charset {

    public MS932_0213() {

        super("x-MS932_0213", ExtendedCharsets.aliasesFor("x-MS932_0213"));

    }

    public boolean contains(Charset cs) {

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

                || (cs instanceof MS932)

                || (cs instanceof MS932_0213));

    }

    public CharsetDecoder newDecoder() {

        return new Decoder(this);

    }

    public CharsetEncoder newEncoder() {

        return new Encoder(this);

    }

    protected static class Decoder extends SJIS_0213.Decoder {

        static final DoubleByte.Decoder decMS932 =

            (DoubleByte.Decoder)new MS932().newDecoder();

        protected Decoder(Charset cs) {

            super(cs);

        }

        protected char decodeDouble(int b1, int b2) {

            char c = decMS932.decodeDouble(b1, b2);

            if (c == UNMAPPABLE_DECODING)

                return super.decodeDouble(b1, b2);

            return c;

        }

    }

    protected static class Encoder extends SJIS_0213.Encoder {

        // we only use its encodeChar() method

        static final DoubleByte.Encoder encMS932 =

            (DoubleByte.Encoder)new MS932().newEncoder();

        protected Encoder(Charset cs) {

            super(cs);

        }

        protected int encodeChar(char ch) {

            int db = encMS932.encodeChar(ch);

            if (db == UNMAPPABLE_ENCODING)

                return super.encodeChar(ch);

            return db;

        }

    }

}