1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
|
/*
* Copyright (c) 1996, 1997, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.io;
public class ByteToCharISO2022JP extends ByteToCharJIS0208 {
private static final int ASCII = 0; // ESC ( B
private static final int JISX0201_1976 = 1; // ESC ( J
private static final int JISX0208_1978 = 2; // ESC $ @
private static final int JISX0208_1983 = 3; // ESC $ B
private static final int JISX0201_1976_KANA = 4; // ESC ( I
private static final int SHIFTOUT = 5; // SO (0x0e)
private int currentState;
private int savedSize;
private byte[] savedBytes;
public ByteToCharISO2022JP() {
super();
savedBytes = new byte[2];
currentState = ASCII;
savedSize = 0;
}
public int flush(char [] output, int outStart, int outEnd)
throws MalformedInputException
{
if (savedSize != 0) {
savedSize = 0;
currentState = ASCII;
badInputLength = 0;
throw new MalformedInputException();
}
byteOff = charOff = 0;
return 0;
}
/**
* Character conversion
*/
public int convert(byte[] input, int inOff, int inEnd,
char[] output, int outOff, int outEnd)
throws UnknownCharacterException, MalformedInputException,
ConversionBufferFullException
{
int previousState = ASCII;
int inputSize = 0;
char outputChar = '\uFFFD';
// readOff keeps the actual buffer's pointer.
// byteOff keeps original buffer's pointer.
int readOff = byteOff = inOff;
if (savedSize != 0) {
if (savedBytes[0] == 0x1b) { // ESC
if ((savedSize == 2 &&
(savedBytes[1] == 0x28 &&
input[0] != 'B' &&
input[0] != 'J' &&
input[0] != 'I') &&
(savedBytes[1] == 0x24 &&
input[0] != '@' &&
input[0] != 'B')) ||
((savedSize == 1) &&
(input[0] != 0x28 &&
input[0] != 0x24))) {
badInputLength = 0;
throw new MalformedInputException();
}
if ((inEnd - inOff) == 1 && savedSize == 1 &&
savedBytes[0] == 0x1b) {
savedSize = 2;
savedBytes[1] = input[0];
byteOff++;
return 0;
}
}
byte[] newBuf = new byte[inEnd - inOff + savedSize];
for (int i = 0; i < savedSize; i++) {
newBuf[i] = savedBytes[i];
}
System.arraycopy(input, inOff, newBuf, savedSize, inEnd - inOff);
byteOff -= savedSize;
input = newBuf;
inOff = 0;
inEnd = newBuf.length;
savedSize = 0;
}
charOff = outOff;
readOff = inOff;
while(readOff < inEnd) {
int byte1, byte2, byte3;
boolean noOutput = false;
// Is there room in the output buffer for the result?
if (charOff >= outEnd) {
throw new ConversionBufferFullException();
}
// Get the input byte
byte1 = input[readOff] & 0xFF;
inputSize = 1;
if ((byte1 & (byte)0x80) != 0){
badInputLength = 1;
throw new MalformedInputException();
}
// Is this a escape sequence?
while (byte1 == 0x1b || byte1 == 0x0e || byte1 == 0x0f) {
if (byte1 == 0x1b){ // ESC
if (readOff + inputSize + 1 >= inEnd) {
if (readOff + inputSize >= inEnd) {
savedSize = 1;
savedBytes[0] = (byte)byte1;
} else {
savedSize = 2;
savedBytes[0] = (byte)byte1;
savedBytes[1] = (byte)input[readOff + inputSize];
inputSize++;
}
break;
}
byte2 = input[readOff + inputSize] & 0xFF;
inputSize++;
if ((byte2 & (byte)0x80) != 0){
badInputLength = 2;
throw new MalformedInputException();
}
if (byte2 == 0x28){
byte3 = input[readOff + inputSize] & 0xFF;
inputSize++;
if (byte3 == 'B'){
currentState = ASCII;
} else if (byte3 == 'J'){
currentState = JISX0201_1976;
} else if (byte3 == 'I'){
currentState = JISX0201_1976_KANA;
} else {
// illegal ESC sequence
badInputLength = 3;
throw new MalformedInputException();
}
} else if (byte2 == '$'){
byte3 = input[readOff + inputSize] & 0xFF;
inputSize++;
if ((byte3 & (byte)0x80) != 0){
badInputLength = 3;
throw new MalformedInputException();
}
if (byte3 == '@'){
currentState = JISX0208_1978;
} else if (byte3 == 'B'){
currentState = JISX0208_1983;
} else {
// illegal ESC sequence
badInputLength = 3;
throw new MalformedInputException();
}
} else {
// illegal ESC sequence
badInputLength = 2;
throw new MalformedInputException();
}
if (readOff + inputSize >= inEnd) {
noOutput = true;
break;
} else {
byte1 = input[readOff + inputSize];
inputSize++;
}
} else if (byte1 == 0x0e){ // shift out for one byte kana
previousState = currentState;
currentState = SHIFTOUT;
if (readOff + inputSize >= inEnd) {
noOutput = true;
break;
}
byte1 = input[readOff + inputSize];
inputSize++;
if ((byte1 & (byte)0x80) != 0){
badInputLength = 1;
throw new MalformedInputException();
}
} else if (byte1 == 0x0f){ // shift in for previous mode
currentState = previousState;
if (readOff + inputSize >= inEnd) {
noOutput = true;
break;
}
byte1 = input[readOff + inputSize];
inputSize++;
if ((byte1 & (byte)0x80) != 0){
badInputLength = 1;
throw new MalformedInputException();
}
}
}
if (noOutput || savedSize != 0) {
byteOff += inputSize;
break;
}
noOutput = false;
switch (currentState){
case ASCII:
outputChar = (char)(byte1 & 0xff);
break;
case JISX0201_1976:
switch (byte1) {
case 0x5c:
outputChar = '\u00a5';
break;
case 0x7e:
outputChar = '\u203e';
break;
default:
outputChar = (char)byte1;
break;
}
break;
case JISX0208_1978:
case JISX0208_1983:
if (readOff + inputSize >= inEnd) {
savedSize = 1;
savedBytes[0] = (byte)byte1;
break;
}
byte2 = input[readOff + inputSize] & 0xff;
inputSize++;
if ((byte2 & (byte)0x80) != 0){
badInputLength = 1;
throw new MalformedInputException();
}
// jisx0208Chars table convert FULLWIDTH_REVERSE_SOLIDUS
// 0x2140 to REVERSE_SOLIDUS (BACKSLASH) 0x5c.
// This behavior causes problem because
// 0x5c is special escape character for java.
if (byte1 == 0x21 && byte2 == 0x40) {
outputChar = '\uFF3C';
} else {
try {
outputChar = getUnicode(byte1, byte2);
} catch (ArrayIndexOutOfBoundsException e) {
outputChar = '\uFFFD';
}
}
break;
case JISX0201_1976_KANA:
case SHIFTOUT:
if (byte1 > 0x60) {
badInputLength = 1;
throw new MalformedInputException();
}
outputChar = (char)(byte1 + 0xff40);
break;
}
if (savedSize != 0) {
byteOff += inputSize;
break;
}
if (outputChar == '\uFFFD') {
if (subMode)
outputChar = subChars[0];
else {
badInputLength = inputSize;
throw new UnknownCharacterException();
}
}
readOff += inputSize;
byteOff += inputSize;
output[charOff++] = outputChar;
}
return charOff - outOff;
}
public void reset() {
byteOff = charOff = 0;
currentState = ASCII;
savedSize = 0;
}
public String getCharacterEncoding() {
return "ISO2022JP";
}
}
|
