1 /*

     2  * Copyright (c) 2003, 2010, 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 /*

    27  */

    28 

    29 package sun.nio.cs.ext;

    30 

    31 import java.nio.charset.Charset;

    32 import java.nio.charset.CharsetDecoder;

    33 import java.nio.charset.CharsetEncoder;

    34 import java.nio.charset.CoderResult;

    35 import java.nio.ByteBuffer;

    36 import java.nio.CharBuffer;

    37 import sun.nio.cs.HistoricallyNamedCharset;

    38 

    39 public class PCK

    40     extends Charset

    41     implements HistoricallyNamedCharset

    42 {

    43 

    44     public PCK() {

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

    46     }

    47 

    48     public String historicalName() {

    49         return "PCK";

    50     }

    51 

    52     public boolean contains(Charset cs) {

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

    54                 || (cs instanceof JIS_X_0201)

    55                 || (cs instanceof PCK));

    56     }

    57 

    58     public CharsetDecoder newDecoder() {

    59         return new Decoder(this);

    60     }

    61 

    62     public CharsetEncoder newEncoder() {

    63 

    64         // Need to force the replacement byte to 0x3f

    65         // because JIS_X_0208_Encoder defines its own

    66         // alternative 2 byte substitution to permit it

    67         // to exist as a self-standing Encoder

    68 

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

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

    71     }

    72 

    73     private static class Decoder extends SJIS.Decoder {

    74 

    75         JIS_X_0208_Solaris_Decoder jis0208;

    76         private static final char REPLACE_CHAR='\uFFFD';

    77 

    78         private Decoder(Charset cs) {

    79             super(cs);

    80             jis0208 = new JIS_X_0208_Solaris_Decoder(cs);

    81         }

    82 

    83         protected char decodeDouble(int c1, int c2) {

    84             char outChar;

    85 

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

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

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

    89             } else {

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

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

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

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

    94                 int b2 = c2 - cellOffset;

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

    96                 return outChar2;

    97             }

    98         }

    99     }

   100 

   101     private static class Encoder extends SJIS.Encoder {

   102 

   103         private JIS_X_0201.Encoder jis0201;

   104 

   105         private static final short[] j0208Index1 =

   106             JIS_X_0208_Solaris_Encoder.getIndex1();

   107         private static final String[] j0208Index2 =

   108             JIS_X_0208_Solaris_Encoder.getIndex2();

   109 

   110         private Encoder(Charset cs) {

   111             super(cs);

   112             jis0201 = new JIS_X_0201.Encoder(cs);

   113         }

   114 

   115         protected int encodeDouble(char ch) {

   116             int result = 0;

   117 

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

   119 

   120             switch (ch) {

   121                 case '\u2015':

   122                     return 0x815C;

   123                 case '\u2014':

   124                     return 0;

   125                 default:

   126                     break;

   127             }

   128 

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

   130                 return result;

   131             }

   132             else {

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

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

   135                 if (pos != 0) {

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

   137                 int c2 = pos & 0xff;

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

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

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

   141                 }

   142             }

   143             return result;

   144         }

   145     }

   146 }