PCK_OLD.java revision 6073:cea72c2bf071
1/* 2 * Copyright (c) 2003, 2012, 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 29import java.nio.charset.Charset; 30import java.nio.charset.CharsetDecoder; 31import java.nio.charset.CharsetEncoder; 32import java.nio.charset.CoderResult; 33import java.nio.ByteBuffer; 34import java.nio.CharBuffer; 35import sun.nio.cs.HistoricallyNamedCharset; 36 37public 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} 145