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 }