/*

 * 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

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/*

 */

package sun.nio.cs.ext;

import java.nio.charset.Charset;

import java.nio.charset.CharsetDecoder;

import java.nio.charset.CharsetEncoder;

import java.nio.charset.CoderResult;

import java.nio.ByteBuffer;

import java.nio.CharBuffer;

import sun.nio.cs.HistoricallyNamedCharset;

public class PCK

    extends Charset

    implements HistoricallyNamedCharset

{

    public PCK() {

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

    }

    public String historicalName() {

        return "PCK";

    }

    public boolean contains(Charset cs) {

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

                || (cs instanceof JIS_X_0201)

                || (cs instanceof PCK));

    }

    public CharsetDecoder newDecoder() {

        return new Decoder(this);

    }

    public CharsetEncoder newEncoder() {

        // Need to force the replacement byte to 0x3f

        // because JIS_X_0208_Encoder defines its own

        // alternative 2 byte substitution to permit it

        // to exist as a self-standing Encoder

        byte[] replacementBytes = { (byte)0x3f };

        return new Encoder(this).replaceWith(replacementBytes);

    }

    private static class Decoder extends SJIS.Decoder {

        JIS_X_0208_Solaris_Decoder jis0208;

        private static final char REPLACE_CHAR='\uFFFD';

        private Decoder(Charset cs) {

            super(cs);

            jis0208 = new JIS_X_0208_Solaris_Decoder(cs);

        }

        protected char decodeDouble(int c1, int c2) {

            char outChar;

            if ((outChar = super.decodeDouble(c1, c2)) != '\uFFFD')  {

                // Map JIS X 0208:1983 0x213D <--> U+2015

                return ((outChar != '\u2014')? outChar: '\u2015');

            } else {

                int adjust = c2 < 0x9F ? 1 : 0;

                int rowOffset = c1 < 0xA0 ? 0x70 : 0xB0;

                int cellOffset = (adjust == 1) ? (c2 > 0x7F ? 0x20 : 0x1F) : 0x7E;

                int b1 = ((c1 - rowOffset) << 1) - adjust;

                int b2 = c2 - cellOffset;

                char outChar2 = jis0208.decodeDouble(b1, b2);

                return outChar2;

            }

        }

    }

    private static class Encoder extends SJIS.Encoder {

        private JIS_X_0201.Encoder jis0201;

        private static final short[] j0208Index1 =

            JIS_X_0208_Solaris_Encoder.getIndex1();

        private static final String[] j0208Index2 =

            JIS_X_0208_Solaris_Encoder.getIndex2();

        private Encoder(Charset cs) {

            super(cs);

            jis0201 = new JIS_X_0201.Encoder(cs);

        }

        protected int encodeDouble(char ch) {

            int result = 0;

            // PCK uses JIS_X_0208:1983 rather than JIS_X_0208:1997

            switch (ch) {

                case '\u2015':

                    return 0x815C;

                case '\u2014':

                    return 0;

                default:

                    break;

            }

            if ((result = super.encodeDouble(ch)) != 0) {

                return result;

            }

            else {

                int offset = j0208Index1[ch >> 8] << 8;

                int pos = j0208Index2[offset >> 12].charAt((offset & 0xfff) + (ch & 0xff));

                if (pos != 0) {

                int c1 = (pos >> 8) & 0xff;

                int c2 = pos & 0xff;

                int rowOffset = c1 < 0x5F ? 0x70 : 0xB0;

                int cellOffset = (c1 % 2 == 1) ? (c2 > 0x5F ? 0x20 : 0x1F) : 0x7E;

                result = ((((c1 + 1 ) >> 1) + rowOffset) << 8) | (c2 + cellOffset);

                }

            }

            return result;

        }

    }

}