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