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1
22
23 package org.enhydra.spi.conf.util;
24
25
29
30 public class SimpleCharStream
31 {
32 public static final boolean staticFlag = false;
33 int bufsize;
34 int available;
35 int tokenBegin;
36 public int bufpos = -1;
37 protected int bufline[];
38 protected int bufcolumn[];
39
40 protected int column = 0;
41 protected int line = 1;
42
43 protected boolean prevCharIsCR = false;
44 protected boolean prevCharIsLF = false;
45
46 protected java.io.Reader  inputStream;
47
48 protected char[] buffer;
49 protected int maxNextCharInd = 0;
50 protected int inBuf = 0;
51
52 protected void ExpandBuff(boolean wrapAround)
53 {
54 char[] newbuffer = new char[bufsize + 2048];
55 int newbufline[] = new int[bufsize + 2048];
56 int newbufcolumn[] = new int[bufsize + 2048];
57
58 try
59 {
60 if (wrapAround)
61 {
62 System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin);
63 System.arraycopy(buffer, 0, newbuffer,
64 bufsize - tokenBegin, bufpos);
65 buffer = newbuffer;
66
67 System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin);
68 System.arraycopy(bufline, 0, newbufline, bufsize - tokenBegin, bufpos);
69 bufline = newbufline;
70
71 System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin);
72 System.arraycopy(bufcolumn, 0, newbufcolumn, bufsize - tokenBegin, bufpos);
73 bufcolumn = newbufcolumn;
74
75 maxNextCharInd = (bufpos += (bufsize - tokenBegin));
76 }
77 else
78 {
79 System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin);
80 buffer = newbuffer;
81
82 System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin);
83 bufline = newbufline;
84
85 System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin);
86 bufcolumn = newbufcolumn;
87
88 maxNextCharInd = (bufpos -= tokenBegin);
89 }
90 }
91 catch (Throwable t)
92 {
93 throw new Error (t.getMessage());
94 }
95
96
97 bufsize += 2048;
98 available = bufsize;
99 tokenBegin = 0;
100 }
101
102 protected void FillBuff() throws java.io.IOException
103 {
104 if (maxNextCharInd == available)
105 {
106 if (available == bufsize)
107 {
108 if (tokenBegin > 2048)
109 {
110 bufpos = maxNextCharInd = 0;
111 available = tokenBegin;
112 }
113 else if (tokenBegin < 0)
114 bufpos = maxNextCharInd = 0;
115 else
116 ExpandBuff(false);
117 }
118 else if (available > tokenBegin)
119 available = bufsize;
120 else if ((tokenBegin - available) < 2048)
121 ExpandBuff(true);
122 else
123 available = tokenBegin;
124 }
125
126 int i;
127 try {
128 if ((i = inputStream.read(buffer, maxNextCharInd,
129 available - maxNextCharInd)) == -1)
130 {
131 inputStream.close();
132 throw new java.io.IOException ();
133 }
134 else
135 maxNextCharInd += i;
136 return;
137 }
138 catch(java.io.IOException e) {
139 --bufpos;
140 backup(0);
141 if (tokenBegin == -1)
142 tokenBegin = bufpos;
143 throw e;
144 }
145 }
146
147 public char BeginToken() throws java.io.IOException
148 {
149 tokenBegin = -1;
150 char c = readChar();
151 tokenBegin = bufpos;
152
153 return c;
154 }
155
156 protected void UpdateLineColumn(char c)
157 {
158 column++;
159
160 if (prevCharIsLF)
161 {
162 prevCharIsLF = false;
163 line += (column = 1);
164 }
165 else if (prevCharIsCR)
166 {
167 prevCharIsCR = false;
168 if (c == '\n')
169 {
170 prevCharIsLF = true;
171 }
172 else
173 line += (column = 1);
174 }
175
176 switch (c)
177 {
178 case '\r' :
179 prevCharIsCR = true;
180 break;
181 case '\n' :
182 prevCharIsLF = true;
183 break;
184 case '\t' :
185 column--;
186 column += (8 - (column & 07));
187 break;
188 default :
189 break;
190 }
191
192 bufline[bufpos] = line;
193 bufcolumn[bufpos] = column;
194 }
195
196 public char readChar() throws java.io.IOException
197 {
198 if (inBuf > 0)
199 {
200 --inBuf;
201
202 if (++bufpos == bufsize)
203 bufpos = 0;
204
205 return buffer[bufpos];
206 }
207
208 if (++bufpos >= maxNextCharInd)
209 FillBuff();
210
211 char c = buffer[bufpos];
212
213 UpdateLineColumn(c);
214 return (c);
215 }
216
217
222
223 public int getColumn() {
224 return bufcolumn[bufpos];
225 }
226
227
232
233 public int getLine() {
234 return bufline[bufpos];
235 }
236
237 public int getEndColumn() {
238 return bufcolumn[bufpos];
239 }
240
241 public int getEndLine() {
242 return bufline[bufpos];
243 }
244
245 public int getBeginColumn() {
246 return bufcolumn[tokenBegin];
247 }
248
249 public int getBeginLine() {
250 return bufline[tokenBegin];
251 }
252
253 public void backup(int amount) {
254
255 inBuf += amount;
256 if ((bufpos -= amount) < 0)
257 bufpos += bufsize;
258 }
259
260 public SimpleCharStream(java.io.Reader dstream, int startline,
261 int startcolumn, int buffersize)
262 {
263 inputStream = dstream;
264 line = startline;
265 column = startcolumn - 1;
266
267 available = bufsize = buffersize;
268 buffer = new char[buffersize];
269 bufline = new int[buffersize];
270 bufcolumn = new int[buffersize];
271 }
272
273 public SimpleCharStream(java.io.Reader dstream, int startline,
274 int startcolumn)
275 {
276 this(dstream, startline, startcolumn, 4096);
277 }
278
279 public SimpleCharStream(java.io.Reader dstream)
280 {
281 this(dstream, 1, 1, 4096);
282 }
283 public void ReInit(java.io.Reader dstream, int startline,
284 int startcolumn, int buffersize)
285 {
286 inputStream = dstream;
287 line = startline;
288 column = startcolumn - 1;
289
290 if (buffer == null || buffersize != buffer.length)
291 {
292 available = bufsize = buffersize;
293 buffer = new char[buffersize];
294 bufline = new int[buffersize];
295 bufcolumn = new int[buffersize];
296 }
297 prevCharIsLF = prevCharIsCR = false;
298 tokenBegin = inBuf = maxNextCharInd = 0;
299 bufpos = -1;
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 public void ReInit(java.io.Reader dstream)
309 {
310 ReInit(dstream, 1, 1, 4096);
311 }
312 public SimpleCharStream(java.io.InputStream dstream, int startline,
313 int startcolumn, int buffersize)
314 {
315 this(new java.io.InputStreamReader (dstream), startline, startcolumn, 4096);
316 }
317
318 public SimpleCharStream(java.io.InputStream dstream, int startline,
319 int startcolumn)
320 {
321 this(dstream, startline, startcolumn, 4096);
322 }
323
324 public SimpleCharStream(java.io.InputStream dstream)
325 {
326 this(dstream, 1, 1, 4096);
327 }
328
329 public void ReInit(java.io.InputStream dstream, int startline,
330 int startcolumn, int buffersize)
331 {
332 ReInit(new java.io.InputStreamReader (dstream), startline, startcolumn, 4096);
333 }
334
335 public void ReInit(java.io.InputStream dstream)
336 {
337 ReInit(dstream, 1, 1, 4096);
338 }
339 public void ReInit(java.io.InputStream dstream, int startline,
340 int startcolumn)
341 {
342 ReInit(dstream, startline, startcolumn, 4096);
343 }
344 public String GetImage()
345 {
346 if (bufpos >= tokenBegin)
347 return new String (buffer, tokenBegin, bufpos - tokenBegin + 1);
348 else
349 return new String (buffer, tokenBegin, bufsize - tokenBegin) +
350 new String (buffer, 0, bufpos + 1);
351 }
352
353 public char[] GetSuffix(int len)
354 {
355 char[] ret = new char[len];
356
357 if ((bufpos + 1) >= len)
358 System.arraycopy(buffer, bufpos - len + 1, ret, 0, len);
359 else
360 {
361 System.arraycopy(buffer, bufsize - (len - bufpos - 1), ret, 0,
362 len - bufpos - 1);
363 System.arraycopy(buffer, 0, ret, len - bufpos - 1, bufpos + 1);
364 }
365
366 return ret;
367 }
368
369 public void Done()
370 {
371 buffer = null;
372 bufline = null;
373 bufcolumn = null;
374 }
375
376
381 public void adjustBeginLineColumn(int newLine, int newCol)
382 {
383 int start = tokenBegin;
384 int len;
385
386 if (bufpos >= tokenBegin)
387 {
388 len = bufpos - tokenBegin + inBuf + 1;
389 }
390 else
391 {
392 len = bufsize - tokenBegin + bufpos + 1 + inBuf;
393 }
394
395 int i = 0, j = 0, k = 0;
396 int nextColDiff = 0, columnDiff = 0;
397
398 while (i < len &&
399 bufline[j = start % bufsize] == bufline[k = ++start % bufsize])
400 {
401 bufline[j] = newLine;
402 nextColDiff = columnDiff + bufcolumn[k] - bufcolumn[j];
403 bufcolumn[j] = newCol + columnDiff;
404 columnDiff = nextColDiff;
405 i++;
406 }
407
408 if (i < len)
409 {
410 bufline[j] = newLine++;
411 bufcolumn[j] = newCol + columnDiff;
412
413 while (i++ < len)
414 {
415 if (bufline[j = start % bufsize] != bufline[++start % bufsize])
416 bufline[j] = newLine++;
417 else
418 bufline[j] = newLine;
419 }
420 }
421
422 line = bufline[j];
423 column = bufcolumn[j];
424 }
425
426 }
427 |
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