J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1999-2004 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | /* Generated By:JavaCC: Do not edit this line. ASCII_UCodeESC_CharStream.java Version 0.7pre6 */ |
| 27 | |
| 28 | package com.sun.tools.example.debug.expr; |
| 29 | |
| 30 | /** |
| 31 | * An implementation of interface CharStream, where the stream is assumed to |
| 32 | * contain only ASCII characters (with java-like unicode escape processing). |
| 33 | */ |
| 34 | |
| 35 | public final class ASCII_UCodeESC_CharStream |
| 36 | { |
| 37 | public static final boolean staticFlag = false; |
| 38 | static final int hexval(char c) throws java.io.IOException { |
| 39 | switch(c) |
| 40 | { |
| 41 | case '0' : |
| 42 | return 0; |
| 43 | case '1' : |
| 44 | return 1; |
| 45 | case '2' : |
| 46 | return 2; |
| 47 | case '3' : |
| 48 | return 3; |
| 49 | case '4' : |
| 50 | return 4; |
| 51 | case '5' : |
| 52 | return 5; |
| 53 | case '6' : |
| 54 | return 6; |
| 55 | case '7' : |
| 56 | return 7; |
| 57 | case '8' : |
| 58 | return 8; |
| 59 | case '9' : |
| 60 | return 9; |
| 61 | |
| 62 | case 'a' : |
| 63 | case 'A' : |
| 64 | return 10; |
| 65 | case 'b' : |
| 66 | case 'B' : |
| 67 | return 11; |
| 68 | case 'c' : |
| 69 | case 'C' : |
| 70 | return 12; |
| 71 | case 'd' : |
| 72 | case 'D' : |
| 73 | return 13; |
| 74 | case 'e' : |
| 75 | case 'E' : |
| 76 | return 14; |
| 77 | case 'f' : |
| 78 | case 'F' : |
| 79 | return 15; |
| 80 | } |
| 81 | |
| 82 | throw new java.io.IOException(); // Should never come here |
| 83 | } |
| 84 | |
| 85 | public int bufpos = -1; |
| 86 | int bufsize; |
| 87 | int available; |
| 88 | int tokenBegin; |
| 89 | private int bufline[]; |
| 90 | private int bufcolumn[]; |
| 91 | |
| 92 | private int column = 0; |
| 93 | private int line = 1; |
| 94 | |
| 95 | private java.io.InputStream inputStream; |
| 96 | |
| 97 | private boolean prevCharIsCR = false; |
| 98 | private boolean prevCharIsLF = false; |
| 99 | |
| 100 | private byte[] nextCharBuf; |
| 101 | private char[] buffer; |
| 102 | private int maxNextCharInd = 0; |
| 103 | private int nextCharInd = -1; |
| 104 | private int inBuf = 0; |
| 105 | |
| 106 | private final void ExpandBuff(boolean wrapAround) |
| 107 | { |
| 108 | char[] newbuffer = new char[bufsize + 2048]; |
| 109 | int newbufline[] = new int[bufsize + 2048]; |
| 110 | int newbufcolumn[] = new int[bufsize + 2048]; |
| 111 | |
| 112 | try |
| 113 | { |
| 114 | if (wrapAround) |
| 115 | { |
| 116 | System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin); |
| 117 | System.arraycopy(buffer, 0, newbuffer, |
| 118 | bufsize - tokenBegin, bufpos); |
| 119 | buffer = newbuffer; |
| 120 | |
| 121 | System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin); |
| 122 | System.arraycopy(bufline, 0, newbufline, bufsize - tokenBegin, bufpos); |
| 123 | bufline = newbufline; |
| 124 | |
| 125 | System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin); |
| 126 | System.arraycopy(bufcolumn, 0, newbufcolumn, bufsize - tokenBegin, bufpos); |
| 127 | bufcolumn = newbufcolumn; |
| 128 | |
| 129 | bufpos += (bufsize - tokenBegin); |
| 130 | } |
| 131 | else |
| 132 | { |
| 133 | System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin); |
| 134 | buffer = newbuffer; |
| 135 | |
| 136 | System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin); |
| 137 | bufline = newbufline; |
| 138 | |
| 139 | System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin); |
| 140 | bufcolumn = newbufcolumn; |
| 141 | |
| 142 | bufpos -= tokenBegin; |
| 143 | } |
| 144 | } |
| 145 | catch (Throwable t) |
| 146 | { |
| 147 | throw new Error(t.getMessage()); |
| 148 | } |
| 149 | |
| 150 | available = (bufsize += 2048); |
| 151 | tokenBegin = 0; |
| 152 | } |
| 153 | |
| 154 | private final void FillBuff() throws java.io.IOException |
| 155 | { |
| 156 | int i; |
| 157 | if (maxNextCharInd == 4096) |
| 158 | maxNextCharInd = nextCharInd = 0; |
| 159 | |
| 160 | try { |
| 161 | if ((i = inputStream.read(nextCharBuf, maxNextCharInd, |
| 162 | 4096 - maxNextCharInd)) == -1) |
| 163 | { |
| 164 | inputStream.close(); |
| 165 | throw new java.io.IOException(); |
| 166 | } |
| 167 | else |
| 168 | maxNextCharInd += i; |
| 169 | return; |
| 170 | } |
| 171 | catch(java.io.IOException e) { |
| 172 | if (bufpos != 0) |
| 173 | { |
| 174 | --bufpos; |
| 175 | backup(0); |
| 176 | } |
| 177 | else |
| 178 | { |
| 179 | bufline[bufpos] = line; |
| 180 | bufcolumn[bufpos] = column; |
| 181 | } |
| 182 | throw e; |
| 183 | } |
| 184 | } |
| 185 | |
| 186 | private final byte ReadByte() throws java.io.IOException |
| 187 | { |
| 188 | if (++nextCharInd >= maxNextCharInd) |
| 189 | FillBuff(); |
| 190 | |
| 191 | return nextCharBuf[nextCharInd]; |
| 192 | } |
| 193 | |
| 194 | public final char BeginToken() throws java.io.IOException |
| 195 | { |
| 196 | if (inBuf > 0) |
| 197 | { |
| 198 | --inBuf; |
| 199 | return buffer[tokenBegin = (bufpos == bufsize - 1) ? (bufpos = 0) |
| 200 | : ++bufpos]; |
| 201 | } |
| 202 | |
| 203 | tokenBegin = 0; |
| 204 | bufpos = -1; |
| 205 | |
| 206 | return readChar(); |
| 207 | } |
| 208 | |
| 209 | private final void AdjustBuffSize() |
| 210 | { |
| 211 | if (available == bufsize) |
| 212 | { |
| 213 | if (tokenBegin > 2048) |
| 214 | { |
| 215 | bufpos = 0; |
| 216 | available = tokenBegin; |
| 217 | } |
| 218 | else |
| 219 | ExpandBuff(false); |
| 220 | } |
| 221 | else if (available > tokenBegin) |
| 222 | available = bufsize; |
| 223 | else if ((tokenBegin - available) < 2048) |
| 224 | ExpandBuff(true); |
| 225 | else |
| 226 | available = tokenBegin; |
| 227 | } |
| 228 | |
| 229 | private final void UpdateLineColumn(char c) |
| 230 | { |
| 231 | column++; |
| 232 | |
| 233 | if (prevCharIsLF) |
| 234 | { |
| 235 | prevCharIsLF = false; |
| 236 | line += (column = 1); |
| 237 | } |
| 238 | else if (prevCharIsCR) |
| 239 | { |
| 240 | prevCharIsCR = false; |
| 241 | if (c == '\n') |
| 242 | { |
| 243 | prevCharIsLF = true; |
| 244 | } |
| 245 | else |
| 246 | line += (column = 1); |
| 247 | } |
| 248 | |
| 249 | switch (c) |
| 250 | { |
| 251 | case '\r' : |
| 252 | prevCharIsCR = true; |
| 253 | break; |
| 254 | case '\n' : |
| 255 | prevCharIsLF = true; |
| 256 | break; |
| 257 | case '\t' : |
| 258 | column--; |
| 259 | column += (8 - (column & 07)); |
| 260 | break; |
| 261 | default : |
| 262 | break; |
| 263 | } |
| 264 | |
| 265 | bufline[bufpos] = line; |
| 266 | bufcolumn[bufpos] = column; |
| 267 | } |
| 268 | |
| 269 | public final char readChar() throws java.io.IOException |
| 270 | { |
| 271 | if (inBuf > 0) |
| 272 | { |
| 273 | --inBuf; |
| 274 | return buffer[(bufpos == bufsize - 1) ? (bufpos = 0) : ++bufpos]; |
| 275 | } |
| 276 | |
| 277 | char c; |
| 278 | |
| 279 | if (++bufpos == available) |
| 280 | AdjustBuffSize(); |
| 281 | |
| 282 | if (((buffer[bufpos] = c = (char)((char)0xff & ReadByte())) == '\\')) |
| 283 | { |
| 284 | UpdateLineColumn(c); |
| 285 | |
| 286 | int backSlashCnt = 1; |
| 287 | |
| 288 | for (;;) // Read all the backslashes |
| 289 | { |
| 290 | if (++bufpos == available) |
| 291 | AdjustBuffSize(); |
| 292 | |
| 293 | try |
| 294 | { |
| 295 | if ((buffer[bufpos] = c = (char)((char)0xff & ReadByte())) != '\\') |
| 296 | { |
| 297 | UpdateLineColumn(c); |
| 298 | // found a non-backslash char. |
| 299 | if ((c == 'u') && ((backSlashCnt & 1) == 1)) |
| 300 | { |
| 301 | if (--bufpos < 0) |
| 302 | bufpos = bufsize - 1; |
| 303 | |
| 304 | break; |
| 305 | } |
| 306 | |
| 307 | backup(backSlashCnt); |
| 308 | return '\\'; |
| 309 | } |
| 310 | } |
| 311 | catch(java.io.IOException e) |
| 312 | { |
| 313 | if (backSlashCnt > 1) |
| 314 | backup(backSlashCnt); |
| 315 | |
| 316 | return '\\'; |
| 317 | } |
| 318 | |
| 319 | UpdateLineColumn(c); |
| 320 | backSlashCnt++; |
| 321 | } |
| 322 | |
| 323 | // Here, we have seen an odd number of backslash's followed by a 'u' |
| 324 | try |
| 325 | { |
| 326 | while ((c = (char)((char)0xff & ReadByte())) == 'u') |
| 327 | ++column; |
| 328 | |
| 329 | buffer[bufpos] = c = (char)(hexval(c) << 12 | |
| 330 | hexval((char)((char)0xff & ReadByte())) << 8 | |
| 331 | hexval((char)((char)0xff & ReadByte())) << 4 | |
| 332 | hexval((char)((char)0xff & ReadByte()))); |
| 333 | |
| 334 | column += 4; |
| 335 | } |
| 336 | catch(java.io.IOException e) |
| 337 | { |
| 338 | throw new Error("Invalid escape character at line " + line + |
| 339 | " column " + column + "."); |
| 340 | } |
| 341 | |
| 342 | if (backSlashCnt == 1) |
| 343 | return c; |
| 344 | else |
| 345 | { |
| 346 | backup(backSlashCnt - 1); |
| 347 | return '\\'; |
| 348 | } |
| 349 | } |
| 350 | else |
| 351 | { |
| 352 | UpdateLineColumn(c); |
| 353 | return (c); |
| 354 | } |
| 355 | } |
| 356 | |
| 357 | /** |
| 358 | * @deprecated |
| 359 | * @see #getEndColumn |
| 360 | */ |
| 361 | @Deprecated |
| 362 | public final int getColumn() { |
| 363 | return bufcolumn[bufpos]; |
| 364 | } |
| 365 | |
| 366 | /** |
| 367 | * @deprecated |
| 368 | * @see #getEndLine |
| 369 | */ |
| 370 | @Deprecated |
| 371 | public final int getLine() { |
| 372 | return bufline[bufpos]; |
| 373 | } |
| 374 | |
| 375 | public final int getEndColumn() { |
| 376 | return bufcolumn[bufpos]; |
| 377 | } |
| 378 | |
| 379 | public final int getEndLine() { |
| 380 | return bufline[bufpos]; |
| 381 | } |
| 382 | |
| 383 | public final int getBeginColumn() { |
| 384 | return bufcolumn[tokenBegin]; |
| 385 | } |
| 386 | |
| 387 | public final int getBeginLine() { |
| 388 | return bufline[tokenBegin]; |
| 389 | } |
| 390 | |
| 391 | public final void backup(int amount) { |
| 392 | |
| 393 | inBuf += amount; |
| 394 | if ((bufpos -= amount) < 0) |
| 395 | bufpos += bufsize; |
| 396 | } |
| 397 | |
| 398 | public ASCII_UCodeESC_CharStream(java.io.InputStream dstream, |
| 399 | int startline, int startcolumn, int buffersize) |
| 400 | { |
| 401 | inputStream = dstream; |
| 402 | line = startline; |
| 403 | column = startcolumn - 1; |
| 404 | |
| 405 | available = bufsize = buffersize; |
| 406 | buffer = new char[buffersize]; |
| 407 | bufline = new int[buffersize]; |
| 408 | bufcolumn = new int[buffersize]; |
| 409 | nextCharBuf = new byte[4096]; |
| 410 | } |
| 411 | |
| 412 | public ASCII_UCodeESC_CharStream(java.io.InputStream dstream, |
| 413 | int startline, int startcolumn) |
| 414 | { |
| 415 | this(dstream, startline, startcolumn, 4096); |
| 416 | } |
| 417 | public void ReInit(java.io.InputStream dstream, |
| 418 | int startline, int startcolumn, int buffersize) |
| 419 | { |
| 420 | inputStream = dstream; |
| 421 | line = startline; |
| 422 | column = startcolumn - 1; |
| 423 | |
| 424 | if (buffer == null || buffersize != buffer.length) |
| 425 | { |
| 426 | available = bufsize = buffersize; |
| 427 | buffer = new char[buffersize]; |
| 428 | bufline = new int[buffersize]; |
| 429 | bufcolumn = new int[buffersize]; |
| 430 | nextCharBuf = new byte[4096]; |
| 431 | } |
| 432 | prevCharIsLF = prevCharIsCR = false; |
| 433 | tokenBegin = inBuf = maxNextCharInd = 0; |
| 434 | nextCharInd = bufpos = -1; |
| 435 | } |
| 436 | |
| 437 | public void ReInit(java.io.InputStream dstream, |
| 438 | int startline, int startcolumn) |
| 439 | { |
| 440 | ReInit(dstream, startline, startcolumn, 4096); |
| 441 | } |
| 442 | |
| 443 | public final String GetImage() |
| 444 | { |
| 445 | if (bufpos >= tokenBegin) |
| 446 | return new String(buffer, tokenBegin, bufpos - tokenBegin + 1); |
| 447 | else |
| 448 | return new String(buffer, tokenBegin, bufsize - tokenBegin) + |
| 449 | new String(buffer, 0, bufpos + 1); |
| 450 | } |
| 451 | |
| 452 | public final char[] GetSuffix(int len) |
| 453 | { |
| 454 | char[] ret = new char[len]; |
| 455 | |
| 456 | if ((bufpos + 1) >= len) |
| 457 | System.arraycopy(buffer, bufpos - len + 1, ret, 0, len); |
| 458 | else |
| 459 | { |
| 460 | System.arraycopy(buffer, bufsize - (len - bufpos - 1), ret, 0, |
| 461 | len - bufpos - 1); |
| 462 | System.arraycopy(buffer, 0, ret, len - bufpos - 1, bufpos + 1); |
| 463 | } |
| 464 | |
| 465 | return ret; |
| 466 | } |
| 467 | |
| 468 | public void Done() |
| 469 | { |
| 470 | nextCharBuf = null; |
| 471 | buffer = null; |
| 472 | bufline = null; |
| 473 | bufcolumn = null; |
| 474 | } |
| 475 | |
| 476 | /** |
| 477 | * Method to adjust line and column numbers for the start of a token.<BR> |
| 478 | */ |
| 479 | public void adjustBeginLineColumn(int newLine, int newCol) |
| 480 | { |
| 481 | int start = tokenBegin; |
| 482 | int len; |
| 483 | |
| 484 | if (bufpos >= tokenBegin) |
| 485 | { |
| 486 | len = bufpos - tokenBegin + inBuf + 1; |
| 487 | } |
| 488 | else |
| 489 | { |
| 490 | len = bufsize - tokenBegin + bufpos + 1 + inBuf; |
| 491 | } |
| 492 | |
| 493 | int i = 0, j = 0, k = 0; |
| 494 | int nextColDiff = 0, columnDiff = 0; |
| 495 | |
| 496 | while (i < len && |
| 497 | bufline[j = start % bufsize] == bufline[k = ++start % bufsize]) |
| 498 | { |
| 499 | bufline[j] = newLine; |
| 500 | nextColDiff = columnDiff + bufcolumn[k] - bufcolumn[j]; |
| 501 | bufcolumn[j] = newCol + columnDiff; |
| 502 | columnDiff = nextColDiff; |
| 503 | i++; |
| 504 | } |
| 505 | |
| 506 | if (i < len) |
| 507 | { |
| 508 | bufline[j] = newLine++; |
| 509 | bufcolumn[j] = newCol + columnDiff; |
| 510 | |
| 511 | while (i++ < len) |
| 512 | { |
| 513 | if (bufline[j = start % bufsize] != bufline[++start % bufsize]) |
| 514 | bufline[j] = newLine++; |
| 515 | else |
| 516 | bufline[j] = newLine; |
| 517 | } |
| 518 | } |
| 519 | |
| 520 | line = bufline[j]; |
| 521 | column = bufcolumn[j]; |
| 522 | } |
| 523 | |
| 524 | } |