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My first initial commit with all of mine experimental changes.

Dmitry Kabak (userdima committed 13 years ago

Commit d37b88d1 parent 3f5b46618352 files · +2598093 −-8690Browse files

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1/*
2 * Copyright (c) 1999, 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
26package sun.io;
27
28import sun.nio.cs.ext.ISCII91;
29
30/*
31 * Copyright (c) 1998 International Business Machines.
32 * All Rights Reserved.
33 *
34 * Author : Sunanda Bera, C. Thirumalesh
35 * Last Modified : 23,November,1998
36 *
37 * Purpose : Defines class ByteToCharISCII91.
38 *
39 *
40 * Revision History
41 * ======== =======
42 *
43 * Date By Description
44 * ---- -- -----------
45 *
46 *
47 */
48
49/**
50 * Converter class. Converts between Unicode encoding and ISCII91 encoding.
51 * ISCII91 is the character encoding as defined in Indian Standard document
52 * IS 13194:1991 ( Indian Script Code for Information Interchange ).
53 *
54 * @see sun.io.ByteToCharConverter
55 */
56public class ByteToCharISCII91 extends ByteToCharConverter {
57
58 private static final char[] directMapTable = ISCII91.getDirectMapTable();
59
60 private static final char NUKTA_CHAR = '\u093c';
61 private static final char HALANT_CHAR = '\u094d';
62 private static final char ZWNJ_CHAR = '\u200c';
63 private static final char ZWJ_CHAR = '\u200d';
64 private static final char INVALID_CHAR = '\uffff';
65
66 private char contextChar = INVALID_CHAR;
67 private boolean needFlushing = false;
68
69/**
70 * Converts ISCII91 characters to Unicode.
71 * @see sun.io.ByteToCharConverter#convert
72 */
73 public int convert(byte input[], int inStart, int inEnd,
74 char output[], int outStart, int outEnd)
75 throws ConversionBufferFullException, UnknownCharacterException {
76 /*Rules:
77 * 1)ATR,EXT,following character to be replaced with '\ufffd'
78 * 2)Halant + Halant => '\u094d' (Virama) + '\u200c'(ZWNJ)
79 * 3)Halant + Nukta => '\u094d' (Virama) + '\u200d'(ZWJ)
80 */
81 charOff = outStart;
82 byteOff = inStart;
83 while (byteOff < inEnd) {
84 if (charOff >= outEnd) {
85 throw new ConversionBufferFullException();
86 }
87 int index = input[byteOff++];
88 index = ( index < 0 )? ( index + 255 ):index;
89 char currentChar = directMapTable[index];
90
91 // if the contextChar is either ATR || EXT set the output to '\ufffd'
92 if(contextChar == '\ufffd') {
93 output[charOff++] = '\ufffd';
94 contextChar = INVALID_CHAR;
95 needFlushing = false;
96 continue;
97 }
98
99 switch(currentChar) {
100 case '\u0901':
101 case '\u0907':
102 case '\u0908':
103 case '\u090b':
104 case '\u093f':
105 case '\u0940':
106 case '\u0943':
107 case '\u0964':
108 if(needFlushing) {
109 output[charOff++] = contextChar;
110 contextChar = currentChar;
111 continue;
112 }
113 contextChar = currentChar;
114 needFlushing = true;
115 continue;
116 case NUKTA_CHAR:
117 switch(contextChar) {
118 case '\u0901':
119 output[charOff] = '\u0950';
120 break;
121 case '\u0907':
122 output[charOff] = '\u090c';
123 break;
124 case '\u0908':
125 output[charOff] = '\u0961';
126 break;
127 case '\u090b':
128 output[charOff] = '\u0960';
129 break;
130 case '\u093f':
131 output[charOff] = '\u0962';
132 break;
133 case '\u0940':
134 output[charOff] = '\u0963';
135 break;
136 case '\u0943':
137 output[charOff] = '\u0944';
138 break;
139 case '\u0964':
140 output[charOff] = '\u093d';
141 break;
142 case HALANT_CHAR:
143 if(needFlushing) {
144 output[charOff++] = contextChar;
145 contextChar = currentChar;
146 continue;
147 }
148 output[charOff] = ZWJ_CHAR;
149 break;
150 default:
151 if(needFlushing) {
152 output[charOff++] = contextChar;
153 contextChar = currentChar;
154 continue;
155 }
156 output[charOff] = NUKTA_CHAR;
157 }
158 break;
159 case HALANT_CHAR:
160 if(needFlushing) {
161 output[charOff++] = contextChar;
162 contextChar = currentChar;
163 continue;
164 }
165 if(contextChar == HALANT_CHAR) {
166 output[charOff] = ZWNJ_CHAR;
167 break;
168 }
169 output[charOff] = HALANT_CHAR;
170 break;
171 case INVALID_CHAR:
172 if(needFlushing) {
173 output[charOff++] = contextChar;
174 contextChar = currentChar;
175 continue;
176 }
177 if(subMode) {
178 output[charOff] = subChars[0];
179 break;
180 } else {
181 contextChar = INVALID_CHAR;
182 throw new UnknownCharacterException();
183 }
184 default:
185 if(needFlushing) {
186 output[charOff++] = contextChar;
187 contextChar = currentChar;
188 continue;
189 }
190 output[charOff] = currentChar;
191 break;
192 }//end switch
193
194 contextChar = currentChar;
195 needFlushing = false;
196 charOff++;
197 }//end while
198 return charOff - outStart;
199 } //convert()
200
201/**
202 * @see sun.io.ByteToCharConverter#flush
203 */
204 public int flush( char[] output, int outStart, int outEnd )
205 throws MalformedInputException, ConversionBufferFullException
206 {
207 int charsWritten = 0;
208 //if the last char was not flushed, flush it!
209 if(needFlushing) {
210 output[outStart] = contextChar;
211 charsWritten = 1;
212 }
213 contextChar = INVALID_CHAR;
214 needFlushing = false;
215 byteOff = charOff = 0;
216 return charsWritten;
217 }//flush()
218/**
219 * Returns the character set id for the conversion.
220 */
221 public String getCharacterEncoding()
222 {
223 return "ISCII91";
224 }//getCharacterEncoding()
225/**
226 * @see sun.io.ByteToCharConverter#reset
227 */
228 public void reset()
229 {
230 byteOff = charOff = 0;
231 }//reset()
232
233}//end of class definition