1
2
3 package org.apache.maven.surefire.group.parse;
4
5
6
7
8
9
10 public class SimpleCharStream
11 {
12
13 public static final boolean staticFlag = false;
14 int bufsize;
15 int available;
16 int tokenBegin;
17
18 public int bufpos = -1;
19 protected int bufline[];
20 protected int bufcolumn[];
21
22 protected int column = 0;
23 protected int line = 1;
24
25 protected boolean prevCharIsCR = false;
26 protected boolean prevCharIsLF = false;
27
28 protected java.io.Reader inputStream;
29
30 protected char[] buffer;
31 protected int maxNextCharInd = 0;
32 protected int inBuf = 0;
33 protected int tabSize = 1;
34 protected boolean trackLineColumn = true;
35
36 public void setTabSize(int i) { tabSize = i; }
37 public int getTabSize() { return tabSize; }
38
39
40
41 protected void ExpandBuff(boolean wrapAround)
42 {
43 char[] newbuffer = new char[bufsize + 2048];
44 int newbufline[] = new int[bufsize + 2048];
45 int newbufcolumn[] = new int[bufsize + 2048];
46
47 try
48 {
49 if (wrapAround)
50 {
51 System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin);
52 System.arraycopy(buffer, 0, newbuffer, bufsize - tokenBegin, bufpos);
53 buffer = newbuffer;
54
55 System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin);
56 System.arraycopy(bufline, 0, newbufline, bufsize - tokenBegin, bufpos);
57 bufline = newbufline;
58
59 System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin);
60 System.arraycopy(bufcolumn, 0, newbufcolumn, bufsize - tokenBegin, bufpos);
61 bufcolumn = newbufcolumn;
62
63 maxNextCharInd = (bufpos += (bufsize - tokenBegin));
64 }
65 else
66 {
67 System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin);
68 buffer = newbuffer;
69
70 System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin);
71 bufline = newbufline;
72
73 System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin);
74 bufcolumn = newbufcolumn;
75
76 maxNextCharInd = (bufpos -= tokenBegin);
77 }
78 }
79 catch (Throwable t)
80 {
81 throw new Error(t.getMessage());
82 }
83
84
85 bufsize += 2048;
86 available = bufsize;
87 tokenBegin = 0;
88 }
89
90 protected void FillBuff() throws java.io.IOException
91 {
92 if (maxNextCharInd == available)
93 {
94 if (available == bufsize)
95 {
96 if (tokenBegin > 2048)
97 {
98 bufpos = maxNextCharInd = 0;
99 available = tokenBegin;
100 }
101 else if (tokenBegin < 0)
102 bufpos = maxNextCharInd = 0;
103 else
104 ExpandBuff(false);
105 }
106 else if (available > tokenBegin)
107 available = bufsize;
108 else if ((tokenBegin - available) < 2048)
109 ExpandBuff(true);
110 else
111 available = tokenBegin;
112 }
113
114 int i;
115 try {
116 if ((i = inputStream.read(buffer, maxNextCharInd, available - maxNextCharInd)) == -1)
117 {
118 inputStream.close();
119 throw new java.io.IOException();
120 }
121 else
122 maxNextCharInd += i;
123 return;
124 }
125 catch(java.io.IOException e) {
126 --bufpos;
127 backup(0);
128 if (tokenBegin == -1)
129 tokenBegin = bufpos;
130 throw e;
131 }
132 }
133
134
135 public char BeginToken() throws java.io.IOException
136 {
137 tokenBegin = -1;
138 char c = readChar();
139 tokenBegin = bufpos;
140
141 return c;
142 }
143
144 protected void UpdateLineColumn(char c)
145 {
146 column++;
147
148 if (prevCharIsLF)
149 {
150 prevCharIsLF = false;
151 line += (column = 1);
152 }
153 else if (prevCharIsCR)
154 {
155 prevCharIsCR = false;
156 if (c == '\n')
157 {
158 prevCharIsLF = true;
159 }
160 else
161 line += (column = 1);
162 }
163
164 switch (c)
165 {
166 case '\r' :
167 prevCharIsCR = true;
168 break;
169 case '\n' :
170 prevCharIsLF = true;
171 break;
172 case '\t' :
173 column--;
174 column += (tabSize - (column % tabSize));
175 break;
176 default :
177 break;
178 }
179
180 bufline[bufpos] = line;
181 bufcolumn[bufpos] = column;
182 }
183
184
185 public char readChar() throws java.io.IOException
186 {
187 if (inBuf > 0)
188 {
189 --inBuf;
190
191 if (++bufpos == bufsize)
192 bufpos = 0;
193
194 return buffer[bufpos];
195 }
196
197 if (++bufpos >= maxNextCharInd)
198 FillBuff();
199
200 char c = buffer[bufpos];
201
202 UpdateLineColumn(c);
203 return c;
204 }
205
206 @Deprecated
207
208
209
210
211
212 public int getColumn() {
213 return bufcolumn[bufpos];
214 }
215
216 @Deprecated
217
218
219
220
221
222 public int getLine() {
223 return bufline[bufpos];
224 }
225
226
227 public int getEndColumn() {
228 return bufcolumn[bufpos];
229 }
230
231
232 public int getEndLine() {
233 return bufline[bufpos];
234 }
235
236
237 public int getBeginColumn() {
238 return bufcolumn[tokenBegin];
239 }
240
241
242 public int getBeginLine() {
243 return bufline[tokenBegin];
244 }
245
246
247 public void backup(int amount) {
248
249 inBuf += amount;
250 if ((bufpos -= amount) < 0)
251 bufpos += bufsize;
252 }
253
254
255 public SimpleCharStream(java.io.Reader dstream, int startline,
256 int startcolumn, int buffersize)
257 {
258 inputStream = dstream;
259 line = startline;
260 column = startcolumn - 1;
261
262 available = bufsize = buffersize;
263 buffer = new char[buffersize];
264 bufline = new int[buffersize];
265 bufcolumn = new int[buffersize];
266 }
267
268
269 public SimpleCharStream(java.io.Reader dstream, int startline,
270 int startcolumn)
271 {
272 this(dstream, startline, startcolumn, 4096);
273 }
274
275
276 public SimpleCharStream(java.io.Reader dstream)
277 {
278 this(dstream, 1, 1, 4096);
279 }
280
281
282 public void ReInit(java.io.Reader dstream, int startline,
283 int startcolumn, int buffersize)
284 {
285 inputStream = dstream;
286 line = startline;
287 column = startcolumn - 1;
288
289 if (buffer == null || buffersize != buffer.length)
290 {
291 available = bufsize = buffersize;
292 buffer = new char[buffersize];
293 bufline = new int[buffersize];
294 bufcolumn = new int[buffersize];
295 }
296 prevCharIsLF = prevCharIsCR = false;
297 tokenBegin = inBuf = maxNextCharInd = 0;
298 bufpos = -1;
299 }
300
301
302 public void ReInit(java.io.Reader dstream, int startline,
303 int startcolumn)
304 {
305 ReInit(dstream, startline, startcolumn, 4096);
306 }
307
308
309 public void ReInit(java.io.Reader dstream)
310 {
311 ReInit(dstream, 1, 1, 4096);
312 }
313
314 public SimpleCharStream(java.io.InputStream dstream, String encoding, int startline,
315 int startcolumn, int buffersize) throws java.io.UnsupportedEncodingException
316 {
317 this(encoding == null ? new java.io.InputStreamReader(dstream) : new java.io.InputStreamReader(dstream, encoding), startline, startcolumn, buffersize);
318 }
319
320
321 public SimpleCharStream(java.io.InputStream dstream, int startline,
322 int startcolumn, int buffersize)
323 {
324 this(new java.io.InputStreamReader(dstream), startline, startcolumn, buffersize);
325 }
326
327
328 public SimpleCharStream(java.io.InputStream dstream, String encoding, int startline,
329 int startcolumn) throws java.io.UnsupportedEncodingException
330 {
331 this(dstream, encoding, startline, startcolumn, 4096);
332 }
333
334
335 public SimpleCharStream(java.io.InputStream dstream, int startline,
336 int startcolumn)
337 {
338 this(dstream, startline, startcolumn, 4096);
339 }
340
341
342 public SimpleCharStream(java.io.InputStream dstream, String encoding) throws java.io.UnsupportedEncodingException
343 {
344 this(dstream, encoding, 1, 1, 4096);
345 }
346
347
348 public SimpleCharStream(java.io.InputStream dstream)
349 {
350 this(dstream, 1, 1, 4096);
351 }
352
353
354 public void ReInit(java.io.InputStream dstream, String encoding, int startline,
355 int startcolumn, int buffersize) throws java.io.UnsupportedEncodingException
356 {
357 ReInit(encoding == null ? new java.io.InputStreamReader(dstream) : new java.io.InputStreamReader(dstream, encoding), startline, startcolumn, buffersize);
358 }
359
360
361 public void ReInit(java.io.InputStream dstream, int startline,
362 int startcolumn, int buffersize)
363 {
364 ReInit(new java.io.InputStreamReader(dstream), startline, startcolumn, buffersize);
365 }
366
367
368 public void ReInit(java.io.InputStream dstream, String encoding) throws java.io.UnsupportedEncodingException
369 {
370 ReInit(dstream, encoding, 1, 1, 4096);
371 }
372
373
374 public void ReInit(java.io.InputStream dstream)
375 {
376 ReInit(dstream, 1, 1, 4096);
377 }
378
379 public void ReInit(java.io.InputStream dstream, String encoding, int startline,
380 int startcolumn) throws java.io.UnsupportedEncodingException
381 {
382 ReInit(dstream, encoding, startline, startcolumn, 4096);
383 }
384
385 public void ReInit(java.io.InputStream dstream, int startline,
386 int startcolumn)
387 {
388 ReInit(dstream, startline, startcolumn, 4096);
389 }
390
391 public String GetImage()
392 {
393 if (bufpos >= tokenBegin)
394 return new String(buffer, tokenBegin, bufpos - tokenBegin + 1);
395 else
396 return new String(buffer, tokenBegin, bufsize - tokenBegin) +
397 new String(buffer, 0, bufpos + 1);
398 }
399
400
401 public char[] GetSuffix(int len)
402 {
403 char[] ret = new char[len];
404
405 if ((bufpos + 1) >= len)
406 System.arraycopy(buffer, bufpos - len + 1, ret, 0, len);
407 else
408 {
409 System.arraycopy(buffer, bufsize - (len - bufpos - 1), ret, 0,
410 len - bufpos - 1);
411 System.arraycopy(buffer, 0, ret, len - bufpos - 1, bufpos + 1);
412 }
413
414 return ret;
415 }
416
417
418 public void Done()
419 {
420 buffer = null;
421 bufline = null;
422 bufcolumn = null;
423 }
424
425
426
427
428 public void adjustBeginLineColumn(int newLine, int newCol)
429 {
430 int start = tokenBegin;
431 int len;
432
433 if (bufpos >= tokenBegin)
434 {
435 len = bufpos - tokenBegin + inBuf + 1;
436 }
437 else
438 {
439 len = bufsize - tokenBegin + bufpos + 1 + inBuf;
440 }
441
442 int i = 0, j = 0, k = 0;
443 int nextColDiff = 0, columnDiff = 0;
444
445 while (i < len && bufline[j = start % bufsize] == bufline[k = ++start % bufsize])
446 {
447 bufline[j] = newLine;
448 nextColDiff = columnDiff + bufcolumn[k] - bufcolumn[j];
449 bufcolumn[j] = newCol + columnDiff;
450 columnDiff = nextColDiff;
451 i++;
452 }
453
454 if (i < len)
455 {
456 bufline[j] = newLine++;
457 bufcolumn[j] = newCol + columnDiff;
458
459 while (i++ < len)
460 {
461 if (bufline[j = start % bufsize] != bufline[++start % bufsize])
462 bufline[j] = newLine++;
463 else
464 bufline[j] = newLine;
465 }
466 }
467
468 line = bufline[j];
469 column = bufcolumn[j];
470 }
471 boolean getTrackLineColumn() { return trackLineColumn; }
472 void setTrackLineColumn(boolean tlc) { trackLineColumn = tlc; }
473 }
474