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1
19 package org.netbeans.modules.css.text.syntax.javacc.lib;
20
21
25
26 public final class ASCIICharStream implements CharStream
27 {
28 public static final boolean staticFlag = false;
29 int bufsize;
30 int available;
31 int tokenBegin;
32 public int bufpos = -1;
33 private int bufline[];
34 private int bufcolumn[];
35
36 private int column = 0;
37 private int line = 1;
38
39 private boolean prevCharIsCR = false;
40 private boolean prevCharIsLF = false;
41
42 private java.io.Reader  inputStream;
43
44 private char[] buffer;
45 private int maxNextCharInd = 0;
46 private int inBuf = 0;
47
48 private final void ExpandBuff(boolean wrapAround)
49 {
50 char[] newbuffer = new char[bufsize + 2048];
51 int newbufline[] = new int[bufsize + 2048];
52 int newbufcolumn[] = new int[bufsize + 2048];
53
54 try
55 {
56 if (wrapAround)
57 {
58 System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin);
59 System.arraycopy(buffer, 0, newbuffer,
60 bufsize - tokenBegin, bufpos);
61 buffer = newbuffer;
62
63 System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin);
64 System.arraycopy(bufline, 0, newbufline, bufsize - tokenBegin, bufpos);
65 bufline = newbufline;
66
67 System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin);
68 System.arraycopy(bufcolumn, 0, newbufcolumn, bufsize - tokenBegin, bufpos);
69 bufcolumn = newbufcolumn;
70
71 maxNextCharInd = (bufpos += (bufsize - tokenBegin));
72 }
73 else
74 {
75 System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin);
76 buffer = newbuffer;
77
78 System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin);
79 bufline = newbufline;
80
81 System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin);
82 bufcolumn = newbufcolumn;
83
84 maxNextCharInd = (bufpos -= tokenBegin);
85 }
86 }
87 catch (Throwable t)
88 {
89 throw new Error (t.getMessage());
90 }
91
92
93 bufsize += 2048;
94 available = bufsize;
95 tokenBegin = 0;
96 }
97
98 private final void FillBuff() throws java.io.IOException
99 {
100 if (maxNextCharInd == available)
101 {
102 if (available == bufsize)
103 {
104 if (tokenBegin > 2048)
105 {
106 bufpos = maxNextCharInd = 0;
107 available = tokenBegin;
108 }
109 else if (tokenBegin < 0)
110 bufpos = maxNextCharInd = 0;
111 else
112 ExpandBuff(false);
113 }
114 else if (available > tokenBegin)
115 available = bufsize;
116 else if ((tokenBegin - available) < 2048)
117 ExpandBuff(true);
118 else
119 available = tokenBegin;
120 }
121
122 int i;
123 try {
124 if ((i = inputStream.read(buffer, maxNextCharInd,
125 available - maxNextCharInd)) == -1)
126 {
127 inputStream.close();
128 throw new java.io.IOException ();
129 }
130 else
131 maxNextCharInd += i;
132 return;
133 }
134 catch(java.io.IOException e) {
135 --bufpos;
136 backup(0);
137 if (tokenBegin == -1)
138 tokenBegin = bufpos;
139 throw e;
140 }
141 }
142
143 public final char BeginToken() throws java.io.IOException
144 {
145 tokenBegin = -1;
146 char c = readChar();
147 tokenBegin = bufpos;
148
149 return c;
150 }
151
152 private final void UpdateLineColumn(char c)
153 {
154 column++;
155
156 if (prevCharIsLF)
157 {
158 prevCharIsLF = false;
159 line += (column = 1);
160 }
161 else if (prevCharIsCR)
162 {
163 prevCharIsCR = false;
164 if (c == '\n')
165 {
166 prevCharIsLF = true;
167 }
168 else
169 line += (column = 1);
170 }
171
172 switch (c)
173 {
174 case '\r' :
175 prevCharIsCR = true;
176 break;
177 case '\n' :
178 prevCharIsLF = true;
179 break;
180 case '\t' :
181 column--;
182 column += (8 - (column & 07));
183 break;
184 default :
185 break;
186 }
187
188 bufline[bufpos] = line;
189 bufcolumn[bufpos] = column;
190 }
191
192 public final char readChar() throws java.io.IOException
193 {
194 if (inBuf > 0)
195 {
196 --inBuf;
197 return (char)((char)0xff & buffer[(bufpos == bufsize - 1) ? (bufpos = 0) : ++bufpos]);
198 }
199
200 if (++bufpos >= maxNextCharInd)
201 FillBuff();
202
203 char c = (char)((char)0xff & buffer[bufpos]);
204
205 UpdateLineColumn(c);
206 return (c);
207 }
208
209
213
214 public final int getColumn() {
215 return bufcolumn[bufpos];
216 }
217
218
222
223 public final int getLine() {
224 return bufline[bufpos];
225 }
226
227 public final int getEndColumn() {
228 return bufcolumn[bufpos];
229 }
230
231 public final int getEndLine() {
232 return bufline[bufpos];
233 }
234
235 public final int getBeginColumn() {
236 return bufcolumn[tokenBegin];
237 }
238
239 public final int getBeginLine() {
240 return bufline[tokenBegin];
241 }
242
243 public final void backup(int amount) {
244
245 inBuf += amount;
246 if ((bufpos -= amount) < 0)
247 bufpos += bufsize;
248 }
249
250 public ASCIICharStream(java.io.Reader dstream,int startline,int startcolumn,int buffersize)
251 {
252 inputStream = dstream;
253 line = startline;
254 column = startcolumn - 1;
255
256 available = bufsize = buffersize;
257 buffer = new char[buffersize];
258 bufline = new int[buffersize];
259 bufcolumn = new int[buffersize];
260 }
261
262 public ASCIICharStream(java.io.Reader dstream,int startline,int startcolumn)
263 {
264 this(dstream, startline, startcolumn, 4096);
265 }
266 public void ReInit(java.io.Reader dstream, int startline,
267 int startcolumn, int buffersize)
268 {
269 inputStream = dstream;
270 line = startline;
271 column = startcolumn - 1;
272
273 if (buffer == null || buffersize != buffer.length)
274 {
275 available = bufsize = buffersize;
276 buffer = new char[buffersize];
277 bufline = new int[buffersize];
278 bufcolumn = new int[buffersize];
279 }
280 prevCharIsLF = prevCharIsCR = false;
281 tokenBegin = inBuf = maxNextCharInd = 0;
282 bufpos = -1;
283 }
284
285 public void ReInit(java.io.Reader dstream, int startline,
286 int startcolumn)
287 {
288 ReInit(dstream, startline, startcolumn, 4096);
289 }
290 public ASCIICharStream(java.io.InputStream dstream,int startline,int startcolumn,int buffersize)
291 {
292 this(new java.io.InputStreamReader (dstream), startline, startcolumn, 4096);
293 }
294
295 public ASCIICharStream(java.io.InputStream dstream,int startline,int startcolumn)
296 {
297 this(dstream, startline, startcolumn, 4096);
298 }
299
300 public void ReInit(java.io.InputStream dstream, int startline,
301 int startcolumn, int buffersize)
302 {
303 ReInit(new java.io.InputStreamReader (dstream), startline, startcolumn, 4096);
304 }
305 public void ReInit(java.io.InputStream dstream, int startline,
306 int startcolumn)
307 {
308 ReInit(dstream, startline, startcolumn, 4096);
309 }
310 public final String GetImage()
311 {
312 if (bufpos >= tokenBegin)
313 return new String (buffer, tokenBegin, bufpos - tokenBegin + 1);
314 else
315 return new String (buffer, tokenBegin, bufsize - tokenBegin) +
316 new String (buffer, 0, bufpos + 1);
317 }
318
319 public final char[] GetSuffix(int len)
320 {
321 char[] ret = new char[len];
322
323 if ((bufpos + 1) >= len)
324 System.arraycopy(buffer, bufpos - len + 1, ret, 0, len);
325 else
326 {
327 System.arraycopy(buffer, bufsize - (len - bufpos - 1), ret, 0,
328 len - bufpos - 1);
329 System.arraycopy(buffer, 0, ret, len - bufpos - 1, bufpos + 1);
330 }
331
332 return ret;
333 }
334
335 public void Done()
336 {
337 buffer = null;
338 bufline = null;
339 bufcolumn = null;
340 }
341
342
345 public void adjustBeginLineColumn(int newLine, int newCol)
346 {
347 int start = tokenBegin;
348 int len;
349
350 if (bufpos >= tokenBegin)
351 {
352 len = bufpos - tokenBegin + inBuf + 1;
353 }
354 else
355 {
356 len = bufsize - tokenBegin + bufpos + 1 + inBuf;
357 }
358
359 int i = 0, j = 0, k = 0;
360 int nextColDiff = 0, columnDiff = 0;
361
362 while (i < len &&
363 bufline[j = start % bufsize] == bufline[k = ++start % bufsize])
364 {
365 bufline[j] = newLine;
366 nextColDiff = columnDiff + bufcolumn[k] - bufcolumn[j];
367 bufcolumn[j] = newCol + columnDiff;
368 columnDiff = nextColDiff;
369 i++;
370 }
371
372 if (i < len)
373 {
374 bufline[j] = newLine++;
375 bufcolumn[j] = newCol + columnDiff;
376
377 while (i++ < len)
378 {
379 if (bufline[j = start % bufsize] != bufline[++start % bufsize])
380 bufline[j] = newLine++;
381 else
382 bufline[j] = newLine;
383 }
384 }
385
386 line = bufline[j];
387 column = bufcolumn[j];
388 }
389
390 }
391 |
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