| 1 | /* This file was generated by SableCC (http://www.sablecc.org/). */ |
| 2 | |
| 3 | package uk.co.zonetora.fj.ast.lexer; |
| 4 | |
| 5 | import java.io.*; |
| 6 | import java.util.*; |
| 7 | import uk.co.zonetora.fj.ast.node.*; |
| 8 | |
| 9 | public class Lexer |
| 10 | { |
| 11 | protected Token token; |
| 12 | protected State state = State.INITIAL; |
| 13 | |
| 14 | private PushbackReader in; |
| 15 | private int line; |
| 16 | private int pos; |
| 17 | private boolean cr; |
| 18 | private boolean eof; |
| 19 | private final StringBuffer text = new StringBuffer(); |
| 20 | |
| 21 | protected void filter() throws LexerException, IOException |
| 22 | { |
| 23 | } |
| 24 | |
| 25 | public Lexer(PushbackReader in) |
| 26 | { |
| 27 | this.in = in; |
| 28 | |
| 29 | if(gotoTable == null) |
| 30 | { |
| 31 | try |
| 32 | { |
| 33 | DataInputStream s = new DataInputStream( |
| 34 | new BufferedInputStream( |
| 35 | Lexer.class.getResourceAsStream("lexer.dat"))); |
| 36 | |
| 37 | // read gotoTable |
| 38 | int length = s.readInt(); |
| 39 | gotoTable = new int[length][][][]; |
| 40 | for(int i = 0; i < gotoTable.length; i++) |
| 41 | { |
| 42 | length = s.readInt(); |
| 43 | gotoTable[i] = new int[length][][]; |
| 44 | for(int j = 0; j < gotoTable[i].length; j++) |
| 45 | { |
| 46 | length = s.readInt(); |
| 47 | gotoTable[i][j] = new int[length][3]; |
| 48 | for(int k = 0; k < gotoTable[i][j].length; k++) |
| 49 | { |
| 50 | for(int l = 0; l < 3; l++) |
| 51 | { |
| 52 | gotoTable[i][j][k][l] = s.readInt(); |
| 53 | } |
| 54 | } |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | // read accept |
| 59 | length = s.readInt(); |
| 60 | accept = new int[length][]; |
| 61 | for(int i = 0; i < accept.length; i++) |
| 62 | { |
| 63 | length = s.readInt(); |
| 64 | accept[i] = new int[length]; |
| 65 | for(int j = 0; j < accept[i].length; j++) |
| 66 | { |
| 67 | accept[i][j] = s.readInt(); |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | s.close(); |
| 72 | } |
| 73 | catch(Exception e) |
| 74 | { |
| 75 | throw new RuntimeException("The file \"lexer.dat\" is either missing or corrupted."); |
| 76 | } |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | public Token peek() throws LexerException, IOException |
| 81 | { |
| 82 | while(token == null) |
| 83 | { |
| 84 | token = getToken(); |
| 85 | filter(); |
| 86 | } |
| 87 | |
| 88 | return token; |
| 89 | } |
| 90 | |
| 91 | public Token next() throws LexerException, IOException |
| 92 | { |
| 93 | while(token == null) |
| 94 | { |
| 95 | token = getToken(); |
| 96 | filter(); |
| 97 | } |
| 98 | |
| 99 | Token result = token; |
| 100 | token = null; |
| 101 | return result; |
| 102 | } |
| 103 | |
| 104 | protected Token getToken() throws IOException, LexerException |
| 105 | { |
| 106 | int dfa_state = 0; |
| 107 | |
| 108 | int start_pos = pos; |
| 109 | int start_line = line; |
| 110 | |
| 111 | int accept_state = -1; |
| 112 | int accept_token = -1; |
| 113 | int accept_length = -1; |
| 114 | int accept_pos = -1; |
| 115 | int accept_line = -1; |
| 116 | |
| 117 | int[][][] gotoTable = this.gotoTable[state.id()]; |
| 118 | int[] accept = this.accept[state.id()]; |
| 119 | text.setLength(0); |
| 120 | |
| 121 | while(true) |
| 122 | { |
| 123 | int c = getChar(); |
| 124 | |
| 125 | if(c != -1) |
| 126 | { |
| 127 | switch(c) |
| 128 | { |
| 129 | case 10: |
| 130 | if(cr) |
| 131 | { |
| 132 | cr = false; |
| 133 | } |
| 134 | else |
| 135 | { |
| 136 | line++; |
| 137 | pos = 0; |
| 138 | } |
| 139 | break; |
| 140 | case 13: |
| 141 | line++; |
| 142 | pos = 0; |
| 143 | cr = true; |
| 144 | break; |
| 145 | default: |
| 146 | pos++; |
| 147 | cr = false; |
| 148 | break; |
| 149 | }; |
| 150 | |
| 151 | text.append((char) c); |
| 152 | |
| 153 | do |
| 154 | { |
| 155 | int oldState = (dfa_state < -1) ? (-2 -dfa_state) : dfa_state; |
| 156 | |
| 157 | dfa_state = -1; |
| 158 | |
| 159 | int[][] tmp1 = gotoTable[oldState]; |
| 160 | int low = 0; |
| 161 | int high = tmp1.length - 1; |
| 162 | |
| 163 | while(low <= high) |
| 164 | { |
| 165 | int middle = (low + high) / 2; |
| 166 | int[] tmp2 = tmp1[middle]; |
| 167 | |
| 168 | if(c < tmp2[0]) |
| 169 | { |
| 170 | high = middle - 1; |
| 171 | } |
| 172 | else if(c > tmp2[1]) |
| 173 | { |
| 174 | low = middle + 1; |
| 175 | } |
| 176 | else |
| 177 | { |
| 178 | dfa_state = tmp2[2]; |
| 179 | break; |
| 180 | } |
| 181 | } |
| 182 | }while(dfa_state < -1); |
| 183 | } |
| 184 | else |
| 185 | { |
| 186 | dfa_state = -1; |
| 187 | } |
| 188 | |
| 189 | if(dfa_state >= 0) |
| 190 | { |
| 191 | if(accept[dfa_state] != -1) |
| 192 | { |
| 193 | accept_state = dfa_state; |
| 194 | accept_token = accept[dfa_state]; |
| 195 | accept_length = text.length(); |
| 196 | accept_pos = pos; |
| 197 | accept_line = line; |
| 198 | } |
| 199 | } |
| 200 | else |
| 201 | { |
| 202 | if(accept_state != -1) |
| 203 | { |
| 204 | switch(accept_token) |
| 205 | { |
| 206 | case 0: |
| 207 | { |
| 208 | Token token = new0( |
| 209 | start_line + 1, |
| 210 | start_pos + 1); |
| 211 | pushBack(accept_length); |
| 212 | pos = accept_pos; |
| 213 | line = accept_line; |
| 214 | return token; |
| 215 | } |
| 216 | case 1: |
| 217 | { |
| 218 | Token token = new1( |
| 219 | start_line + 1, |
| 220 | start_pos + 1); |
| 221 | pushBack(accept_length); |
| 222 | pos = accept_pos; |
| 223 | line = accept_line; |
| 224 | return token; |
| 225 | } |
| 226 | case 2: |
| 227 | { |
| 228 | Token token = new2( |
| 229 | start_line + 1, |
| 230 | start_pos + 1); |
| 231 | pushBack(accept_length); |
| 232 | pos = accept_pos; |
| 233 | line = accept_line; |
| 234 | return token; |
| 235 | } |
| 236 | case 3: |
| 237 | { |
| 238 | Token token = new3( |
| 239 | start_line + 1, |
| 240 | start_pos + 1); |
| 241 | pushBack(accept_length); |
| 242 | pos = accept_pos; |
| 243 | line = accept_line; |
| 244 | return token; |
| 245 | } |
| 246 | case 4: |
| 247 | { |
| 248 | Token token = new4( |
| 249 | start_line + 1, |
| 250 | start_pos + 1); |
| 251 | pushBack(accept_length); |
| 252 | pos = accept_pos; |
| 253 | line = accept_line; |
| 254 | return token; |
| 255 | } |
| 256 | case 5: |
| 257 | { |
| 258 | Token token = new5( |
| 259 | start_line + 1, |
| 260 | start_pos + 1); |
| 261 | pushBack(accept_length); |
| 262 | pos = accept_pos; |
| 263 | line = accept_line; |
| 264 | return token; |
| 265 | } |
| 266 | case 6: |
| 267 | { |
| 268 | Token token = new6( |
| 269 | start_line + 1, |
| 270 | start_pos + 1); |
| 271 | pushBack(accept_length); |
| 272 | pos = accept_pos; |
| 273 | line = accept_line; |
| 274 | return token; |
| 275 | } |
| 276 | case 7: |
| 277 | { |
| 278 | Token token = new7( |
| 279 | start_line + 1, |
| 280 | start_pos + 1); |
| 281 | pushBack(accept_length); |
| 282 | pos = accept_pos; |
| 283 | line = accept_line; |
| 284 | return token; |
| 285 | } |
| 286 | case 8: |
| 287 | { |
| 288 | Token token = new8( |
| 289 | start_line + 1, |
| 290 | start_pos + 1); |
| 291 | pushBack(accept_length); |
| 292 | pos = accept_pos; |
| 293 | line = accept_line; |
| 294 | return token; |
| 295 | } |
| 296 | case 9: |
| 297 | { |
| 298 | Token token = new9( |
| 299 | start_line + 1, |
| 300 | start_pos + 1); |
| 301 | pushBack(accept_length); |
| 302 | pos = accept_pos; |
| 303 | line = accept_line; |
| 304 | return token; |
| 305 | } |
| 306 | case 10: |
| 307 | { |
| 308 | Token token = new10( |
| 309 | start_line + 1, |
| 310 | start_pos + 1); |
| 311 | pushBack(accept_length); |
| 312 | pos = accept_pos; |
| 313 | line = accept_line; |
| 314 | return token; |
| 315 | } |
| 316 | case 11: |
| 317 | { |
| 318 | Token token = new11( |
| 319 | start_line + 1, |
| 320 | start_pos + 1); |
| 321 | pushBack(accept_length); |
| 322 | pos = accept_pos; |
| 323 | line = accept_line; |
| 324 | return token; |
| 325 | } |
| 326 | case 12: |
| 327 | { |
| 328 | Token token = new12( |
| 329 | start_line + 1, |
| 330 | start_pos + 1); |
| 331 | pushBack(accept_length); |
| 332 | pos = accept_pos; |
| 333 | line = accept_line; |
| 334 | return token; |
| 335 | } |
| 336 | case 13: |
| 337 | { |
| 338 | Token token = new13( |
| 339 | start_line + 1, |
| 340 | start_pos + 1); |
| 341 | pushBack(accept_length); |
| 342 | pos = accept_pos; |
| 343 | line = accept_line; |
| 344 | return token; |
| 345 | } |
| 346 | case 14: |
| 347 | { |
| 348 | Token token = new14( |
| 349 | start_line + 1, |
| 350 | start_pos + 1); |
| 351 | pushBack(accept_length); |
| 352 | pos = accept_pos; |
| 353 | line = accept_line; |
| 354 | return token; |
| 355 | } |
| 356 | case 15: |
| 357 | { |
| 358 | Token token = new15( |
| 359 | start_line + 1, |
| 360 | start_pos + 1); |
| 361 | pushBack(accept_length); |
| 362 | pos = accept_pos; |
| 363 | line = accept_line; |
| 364 | return token; |
| 365 | } |
| 366 | case 16: |
| 367 | { |
| 368 | Token token = new16( |
| 369 | getText(accept_length), |
| 370 | start_line + 1, |
| 371 | start_pos + 1); |
| 372 | pushBack(accept_length); |
| 373 | pos = accept_pos; |
| 374 | line = accept_line; |
| 375 | return token; |
| 376 | } |
| 377 | case 17: |
| 378 | { |
| 379 | Token token = new17( |
| 380 | getText(accept_length), |
| 381 | start_line + 1, |
| 382 | start_pos + 1); |
| 383 | pushBack(accept_length); |
| 384 | pos = accept_pos; |
| 385 | line = accept_line; |
| 386 | return token; |
| 387 | } |
| 388 | case 18: |
| 389 | { |
| 390 | Token token = new18( |
| 391 | getText(accept_length), |
| 392 | start_line + 1, |
| 393 | start_pos + 1); |
| 394 | pushBack(accept_length); |
| 395 | pos = accept_pos; |
| 396 | line = accept_line; |
| 397 | return token; |
| 398 | } |
| 399 | } |
| 400 | } |
| 401 | else |
| 402 | { |
| 403 | if(text.length() > 0) |
| 404 | { |
| 405 | throw new LexerException( |
| 406 | "[" + (start_line + 1) + "," + (start_pos + 1) + "]" + |
| 407 | " Unknown token: " + text); |
| 408 | } |
| 409 | else |
| 410 | { |
| 411 | EOF token = new EOF( |
| 412 | start_line + 1, |
| 413 | start_pos + 1); |
| 414 | return token; |
| 415 | } |
| 416 | } |
| 417 | } |
| 418 | } |
| 419 | } |
| 420 | |
| 421 | Token new0(int line, int pos) { return new TTclass(line, pos); } |
| 422 | Token new1(int line, int pos) { return new TExtends(line, pos); } |
| 423 | Token new2(int line, int pos) { return new TSuper(line, pos); } |
| 424 | Token new3(int line, int pos) { return new TThis(line, pos); } |
| 425 | Token new4(int line, int pos) { return new TNew(line, pos); } |
| 426 | Token new5(int line, int pos) { return new TReturn(line, pos); } |
| 427 | Token new6(int line, int pos) { return new TLBrace(line, pos); } |
| 428 | Token new7(int line, int pos) { return new TRBrace(line, pos); } |
| 429 | Token new8(int line, int pos) { return new TSemicolon(line, pos); } |
| 430 | Token new9(int line, int pos) { return new TComma(line, pos); } |
| 431 | Token new10(int line, int pos) { return new TLPar(line, pos); } |
| 432 | Token new11(int line, int pos) { return new TRPar(line, pos); } |
| 433 | Token new12(int line, int pos) { return new TLSq(line, pos); } |
| 434 | Token new13(int line, int pos) { return new TRSq(line, pos); } |
| 435 | Token new14(int line, int pos) { return new TPeriod(line, pos); } |
| 436 | Token new15(int line, int pos) { return new TEq(line, pos); } |
| 437 | Token new16(String text, int line, int pos) { return new TNewLine(text, line, pos); } |
| 438 | Token new17(String text, int line, int pos) { return new TBlank(text, line, pos); } |
| 439 | Token new18(String text, int line, int pos) { return new TIdentifier(text, line, pos); } |
| 440 | |
| 441 | private int getChar() throws IOException |
| 442 | { |
| 443 | if(eof) |
| 444 | { |
| 445 | return -1; |
| 446 | } |
| 447 | |
| 448 | int result = in.read(); |
| 449 | |
| 450 | if(result == -1) |
| 451 | { |
| 452 | eof = true; |
| 453 | } |
| 454 | |
| 455 | return result; |
| 456 | } |
| 457 | |
| 458 | private void pushBack(int acceptLength) throws IOException |
| 459 | { |
| 460 | int length = text.length(); |
| 461 | for(int i = length - 1; i >= acceptLength; i--) |
| 462 | { |
| 463 | eof = false; |
| 464 | |
| 465 | in.unread(text.charAt(i)); |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | protected void unread(Token token) throws IOException |
| 470 | { |
| 471 | String text = token.getText(); |
| 472 | int length = text.length(); |
| 473 | |
| 474 | for(int i = length - 1; i >= 0; i--) |
| 475 | { |
| 476 | eof = false; |
| 477 | |
| 478 | in.unread(text.charAt(i)); |
| 479 | } |
| 480 | |
| 481 | pos = token.getPos() - 1; |
| 482 | line = token.getLine() - 1; |
| 483 | } |
| 484 | |
| 485 | private String getText(int acceptLength) |
| 486 | { |
| 487 | StringBuffer s = new StringBuffer(acceptLength); |
| 488 | for(int i = 0; i < acceptLength; i++) |
| 489 | { |
| 490 | s.append(text.charAt(i)); |
| 491 | } |
| 492 | |
| 493 | return s.toString(); |
| 494 | } |
| 495 | |
| 496 | private static int[][][][] gotoTable; |
| 497 | /* { |
| 498 | { // INITIAL |
| 499 | {{9, 9, 1}, {10, 10, 2}, {13, 13, 3}, {32, 32, 4}, {40, 40, 5}, {41, 41, 6}, {44, 44, 7}, {46, 46, 8}, {59, 59, 9}, {61, 61, 10}, {65, 90, 11}, {91, 91, 12}, {92, 92, 13}, {93, 93, 14}, {95, 95, 15}, {97, 98, 16}, {99, 99, 17}, {100, 100, 16}, {101, 101, 18}, {102, 109, 16}, {110, 110, 19}, {111, 113, 16}, {114, 114, 20}, {115, 115, 21}, {116, 116, 22}, {117, 122, 16}, {123, 123, 23}, {125, 125, 24}, }, |
| 500 | {{9, 9, 1}, {32, 32, 4}, {92, 92, 13}, }, |
| 501 | {}, |
| 502 | {{10, 10, 25}, }, |
| 503 | {{9, 92, -3}, }, |
| 504 | {}, |
| 505 | {}, |
| 506 | {}, |
| 507 | {}, |
| 508 | {}, |
| 509 | {}, |
| 510 | {{48, 57, 26}, {65, 90, 27}, {95, 95, 28}, {97, 122, 29}, }, |
| 511 | {}, |
| 512 | {{110, 110, 30}, }, |
| 513 | {}, |
| 514 | {{48, 122, -13}, }, |
| 515 | {{48, 122, -13}, }, |
| 516 | {{48, 95, -13}, {97, 107, 29}, {108, 108, 31}, {109, 122, 29}, }, |
| 517 | {{48, 95, -13}, {97, 119, 29}, {120, 120, 32}, {121, 122, 29}, }, |
| 518 | {{48, 95, -13}, {97, 100, 29}, {101, 101, 33}, {102, 122, 29}, }, |
| 519 | {{48, 100, -21}, {101, 101, 34}, {102, 122, 29}, }, |
| 520 | {{48, 95, -13}, {97, 116, 29}, {117, 117, 35}, {118, 122, 29}, }, |
| 521 | {{48, 95, -13}, {97, 103, 29}, {104, 104, 36}, {105, 122, 29}, }, |
| 522 | {}, |
| 523 | {}, |
| 524 | {}, |
| 525 | {{48, 122, -13}, }, |
| 526 | {{48, 122, -13}, }, |
| 527 | {{48, 122, -13}, }, |
| 528 | {{48, 122, -13}, }, |
| 529 | {{9, 92, -3}, }, |
| 530 | {{48, 95, -13}, {97, 97, 37}, {98, 122, 29}, }, |
| 531 | {{48, 95, -13}, {97, 115, 29}, {116, 116, 38}, {117, 122, 29}, }, |
| 532 | {{48, 95, -13}, {97, 118, 29}, {119, 119, 39}, {120, 122, 29}, }, |
| 533 | {{48, 115, -34}, {116, 116, 40}, {117, 122, 29}, }, |
| 534 | {{48, 95, -13}, {97, 111, 29}, {112, 112, 41}, {113, 122, 29}, }, |
| 535 | {{48, 95, -13}, {97, 104, 29}, {105, 105, 42}, {106, 122, 29}, }, |
| 536 | {{48, 95, -13}, {97, 114, 29}, {115, 115, 43}, {116, 122, 29}, }, |
| 537 | {{48, 100, -21}, {101, 101, 44}, {102, 122, 29}, }, |
| 538 | {{48, 122, -13}, }, |
| 539 | {{48, 116, -23}, {117, 117, 45}, {118, 122, 29}, }, |
| 540 | {{48, 100, -21}, {101, 101, 46}, {102, 122, 29}, }, |
| 541 | {{48, 114, -39}, {115, 115, 47}, {116, 122, 29}, }, |
| 542 | {{48, 114, -39}, {115, 115, 48}, {116, 122, 29}, }, |
| 543 | {{48, 95, -13}, {97, 109, 29}, {110, 110, 49}, {111, 122, 29}, }, |
| 544 | {{48, 95, -13}, {97, 113, 29}, {114, 114, 50}, {115, 122, 29}, }, |
| 545 | {{48, 113, -47}, {114, 114, 51}, {115, 122, 29}, }, |
| 546 | {{48, 122, -13}, }, |
| 547 | {{48, 122, -13}, }, |
| 548 | {{48, 95, -13}, {97, 99, 29}, {100, 100, 52}, {101, 122, 29}, }, |
| 549 | {{48, 109, -46}, {110, 110, 53}, {111, 122, 29}, }, |
| 550 | {{48, 122, -13}, }, |
| 551 | {{48, 114, -39}, {115, 115, 54}, {116, 122, 29}, }, |
| 552 | {{48, 122, -13}, }, |
| 553 | {{48, 122, -13}, }, |
| 554 | } |
| 555 | };*/ |
| 556 | |
| 557 | private static int[][] accept; |
| 558 | /* { |
| 559 | // INITIAL |
| 560 | {-1, 17, 16, 16, 17, 10, 11, 9, 14, 8, 15, 18, 12, -1, 13, 18, 18, 18, 18, 18, 18, 18, 18, 6, 7, 16, 18, 18, 18, 18, 17, 18, 18, 18, 18, 18, 18, 18, 18, 4, 18, 18, 18, 18, 18, 18, 18, 3, 0, 18, 18, 2, 18, 5, 1, }, |
| 561 | |
| 562 | };*/ |
| 563 | |
| 564 | public static class State |
| 565 | { |
| 566 | public final static State INITIAL = new State(0); |
| 567 | |
| 568 | private int id; |
| 569 | |
| 570 | private State(int id) |
| 571 | { |
| 572 | this.id = id; |
| 573 | } |
| 574 | |
| 575 | public int id() |
| 576 | { |
| 577 | return id; |
| 578 | } |
| 579 | } |
| 580 | } |