1 /*
   2  * Copyright (c) 2004, 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 package sun.nio.cs.ext;
  27 
  28 import java.nio.charset.Charset;
  29 import java.nio.charset.CharsetDecoder;
  30 import java.nio.charset.CharsetEncoder;
  31 import sun.nio.cs.HistoricallyNamedCharset;
  32 import java.util.Arrays;
  33 import static sun.nio.cs.CharsetMapping.*;
  34 
  35 public class Big5_Solaris extends Charset implements HistoricallyNamedCharset
  36 {
  37     public Big5_Solaris() {
  38         super("x-Big5-Solaris", ExtendedCharsets.aliasesFor("x-Big5-Solaris"));
  39     }
  40 
  41     public String historicalName() {
  42         return "Big5_Solaris";
  43     }
  44 
  45     public boolean contains(Charset cs) {
  46         return ((cs.name().equals("US-ASCII"))
  47                 || (cs instanceof Big5)
  48                 || (cs instanceof Big5_Solaris));
  49     }
  50 
  51     public CharsetDecoder newDecoder() {
  52         initb2c();
  53         return new  DoubleByte.Decoder(this, b2c, b2cSB, 0x40, 0xfe);
  54     }
  55 
  56     public CharsetEncoder newEncoder() {
  57         initc2b();
  58         return new DoubleByte.Encoder(this, c2b, c2bIndex);
  59     }
  60 
  61     static char[][] b2c;
  62     static char[] b2cSB;
  63     private static volatile boolean b2cInitialized = false;
  64 
  65     static void initb2c() {
  66         if (b2cInitialized)
  67             return;
  68         synchronized (Big5_Solaris.class) {
  69             if (b2cInitialized)
  70                 return;
  71             Big5.initb2c();
  72             b2c = Big5.b2c.clone();
  73             // Big5 Solaris implementation has 7 additional mappings
  74             int[] sol = new int[] {
  75                 0xF9D6, 0x7881,
  76                 0xF9D7, 0x92B9,
  77                 0xF9D8, 0x88CF,
  78                 0xF9D9, 0x58BB,
  79                 0xF9DA, 0x6052,
  80                 0xF9DB, 0x7CA7,
  81                 0xF9DC, 0x5AFA };
  82             if (b2c[0xf9] == DoubleByte.B2C_UNMAPPABLE) {
  83                 b2c[0xf9] = new char[0xfe - 0x40 + 1];
  84                 Arrays.fill(b2c[0xf9], UNMAPPABLE_DECODING);
  85             }
  86 
  87             for (int i = 0; i < sol.length;) {
  88                 b2c[0xf9][sol[i++] & 0xff - 0x40] = (char)sol[i++];
  89             }
  90             b2cSB = Big5.b2cSB;
  91             b2cInitialized = true;
  92         }
  93     }
  94 
  95     static char[] c2b;
  96     static char[] c2bIndex;
  97     private static volatile boolean c2bInitialized = false;
  98 
  99     static void initc2b() {
 100         if (c2bInitialized)
 101             return;
 102         synchronized (Big5_Solaris.class) {
 103             if (c2bInitialized)
 104                 return;
 105             Big5.initc2b();
 106             c2b = Big5.c2b.clone();
 107             c2bIndex = Big5.c2bIndex.clone();
 108             int[] sol = new int[] {
 109                 0x7881, 0xF9D6,
 110                 0x92B9, 0xF9D7,
 111                 0x88CF, 0xF9D8,
 112                 0x58BB, 0xF9D9,
 113                 0x6052, 0xF9DA,
 114                 0x7CA7, 0xF9DB,
 115                 0x5AFA, 0xF9DC };
 116 
 117             for (int i = 0; i < sol.length;) {
 118                 int c = sol[i++];
 119                 // no need to check c2bIndex[c >>8], we know it points
 120                 // to the appropriate place.
 121                 c2b[c2bIndex[c >> 8] + (c & 0xff)] = (char)sol[i++];
 122             }
 123             c2bInitialized = true;
 124         }
 125     }
 126 }