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 import java.nio.charset.Charset;
  30 import java.nio.charset.CharsetDecoder;
  31 import java.nio.charset.CharsetEncoder;
  32 import java.nio.charset.CoderResult;
  33 import java.nio.ByteBuffer;
  34 import java.nio.CharBuffer;
  35 import sun.nio.cs.HistoricallyNamedCharset;
  36 
  37 public class PCK_OLD
  38     extends Charset
  39     implements HistoricallyNamedCharset
  40 {
  41 
  42     public PCK_OLD() {
  43         super("x-PCK_OLD", null);
  44     }
  45 
  46     public String historicalName() {
  47         return "PCK";
  48     }
  49 
  50     public boolean contains(Charset cs) {
  51         return ((cs.name().equals("US-ASCII"))
  52                 || (cs instanceof JIS_X_0201_OLD)
  53                 || (cs instanceof PCK_OLD));
  54     }
  55 
  56     public CharsetDecoder newDecoder() {
  57         return new Decoder(this);
  58     }
  59 
  60     public CharsetEncoder newEncoder() {
  61 
  62         // Need to force the replacement byte to 0x3f
  63         // because JIS_X_0208_Encoder defines its own
  64         // alternative 2 byte substitution to permit it
  65         // to exist as a self-standing Encoder
  66 
  67         byte[] replacementBytes = { (byte)0x3f };
  68         return new Encoder(this).replaceWith(replacementBytes);
  69     }
  70 
  71     private static class Decoder extends SJIS_OLD.Decoder {
  72 
  73         JIS_X_0208_Solaris_Decoder jis0208;
  74         private static final char REPLACE_CHAR='\uFFFD';
  75 
  76         private Decoder(Charset cs) {
  77             super(cs);
  78             jis0208 = new JIS_X_0208_Solaris_Decoder(cs);
  79         }
  80 
  81         protected char decodeDouble(int c1, int c2) {
  82             char outChar;
  83 
  84             if ((outChar = super.decodeDouble(c1, c2)) != '\uFFFD')  {
  85                 // Map JIS X 0208:1983 0x213D <--> U+2015
  86                 return ((outChar != '\u2014')? outChar: '\u2015');
  87             } else {
  88                 int adjust = c2 < 0x9F ? 1 : 0;
  89                 int rowOffset = c1 < 0xA0 ? 0x70 : 0xB0;
  90                 int cellOffset = (adjust == 1) ? (c2 > 0x7F ? 0x20 : 0x1F) : 0x7E;
  91                 int b1 = ((c1 - rowOffset) << 1) - adjust;
  92                 int b2 = c2 - cellOffset;
  93                 char outChar2 = jis0208.decodeDouble(b1, b2);
  94                 return outChar2;
  95             }
  96         }
  97     }
  98 
  99     private static class Encoder extends SJIS_OLD.Encoder {
 100 
 101         private JIS_X_0201_OLD.Encoder jis0201;
 102 
 103         private static final short[] j0208Index1 =
 104             JIS_X_0208_Solaris_Encoder.getIndex1();
 105         private static final String[] j0208Index2 =
 106             JIS_X_0208_Solaris_Encoder.getIndex2();
 107 
 108         private Encoder(Charset cs) {
 109             super(cs);
 110             jis0201 = new JIS_X_0201_OLD.Encoder(cs);
 111         }
 112 
 113         protected int encodeDouble(char ch) {
 114             int result = 0;
 115 
 116             // PCK uses JIS_X_0208:1983 rather than JIS_X_0208:1997
 117 
 118             switch (ch) {
 119                 case '\u2015':
 120                     return 0x815C;
 121                 case '\u2014':
 122                     return 0;
 123                 default:
 124                     break;
 125             }
 126 
 127             if ((result = super.encodeDouble(ch)) != 0) {
 128                 return result;
 129             }
 130             else {
 131                 int offset = j0208Index1[ch >> 8] << 8;
 132                 int pos = j0208Index2[offset >> 12].charAt((offset & 0xfff) + (ch & 0xff));
 133                 if (pos != 0) {
 134                 int c1 = (pos >> 8) & 0xff;
 135                 int c2 = pos & 0xff;
 136                 int rowOffset = c1 < 0x5F ? 0x70 : 0xB0;
 137                 int cellOffset = (c1 % 2 == 1) ? (c2 > 0x5F ? 0x20 : 0x1F) : 0x7E;
 138                 result = ((((c1 + 1 ) >> 1) + rowOffset) << 8) | (c2 + cellOffset);
 139                 }
 140             }
 141             return result;
 142         }
 143     }
 144 }