| 1 | #include <stdio.h> |
| 2 | #include "sed.h" |
| 3 | |
| 4 | struct label *labtab = ltab; |
| 5 | char CGMES[] = "command garbled: %s\n"; |
| 6 | char TMMES[] = "Too much text: %s\n"; |
| 7 | char LTL[] = "Label too long: %s\n"; |
| 8 | char AD0MES[] = "No addresses allowed: %s\n"; |
| 9 | char AD1MES[] = "Only one address allowed: %s\n"; |
| 10 | char bittab[] = { |
| 11 | 1, |
| 12 | 2, |
| 13 | 4, |
| 14 | 8, |
| 15 | 16, |
| 16 | 32, |
| 17 | 64, |
| 18 | 128 |
| 19 | }; |
| 20 | |
| 21 | main(argc, argv) |
| 22 | char *argv[]; |
| 23 | { |
| 24 | |
| 25 | eargc = argc; |
| 26 | eargv = argv; |
| 27 | |
| 28 | badp = &bad; |
| 29 | aptr = abuf; |
| 30 | lab = labtab + 1; /* 0 reserved for end-pointer */ |
| 31 | rep = ptrspace; |
| 32 | rep->ad1 = respace; |
| 33 | lbend = &linebuf[LBSIZE]; |
| 34 | hend = &holdsp[LBSIZE]; |
| 35 | ptrend = &ptrspace[PTRSIZE]; |
| 36 | reend = &respace[RESIZE]; |
| 37 | labend = &labtab[LABSIZE]; |
| 38 | lnum = 0; |
| 39 | pending = 0; |
| 40 | depth = 0; |
| 41 | spend = linebuf; |
| 42 | fcode[0] = stdout; |
| 43 | nfiles = 1; |
| 44 | |
| 45 | if(eargc == 1) |
| 46 | exit(0); |
| 47 | |
| 48 | |
| 49 | while (--eargc > 0 && (++eargv)[0][0] == '-') |
| 50 | switch (eargv[0][1]) { |
| 51 | |
| 52 | case 'n': |
| 53 | nflag++; |
| 54 | continue; |
| 55 | |
| 56 | case 'f': |
| 57 | if(eargc-- <= 0) exit(2); |
| 58 | |
| 59 | if((fin = fopen(*++eargv, "r")) == NULL) { |
| 60 | fprintf(stderr, "Cannot open pattern-file: %s\n", *eargv); |
| 61 | exit(2); |
| 62 | } |
| 63 | |
| 64 | fcomp(); |
| 65 | fclose(fin); |
| 66 | continue; |
| 67 | |
| 68 | case 'e': |
| 69 | eflag++; |
| 70 | fcomp(); |
| 71 | eflag = 0; |
| 72 | continue; |
| 73 | |
| 74 | case 'g': |
| 75 | gflag++; |
| 76 | continue; |
| 77 | |
| 78 | default: |
| 79 | fprintf(stdout, "Unknown flag: %c\n", eargv[0][1]); |
| 80 | continue; |
| 81 | } |
| 82 | |
| 83 | |
| 84 | if(rep == ptrspace) { |
| 85 | eargv--; |
| 86 | eargc++; |
| 87 | eflag++; |
| 88 | fcomp(); |
| 89 | eargv++; |
| 90 | eargc--; |
| 91 | eflag = 0; |
| 92 | } |
| 93 | |
| 94 | if(depth) { |
| 95 | fprintf(stderr, "Too many {'s"); |
| 96 | exit(2); |
| 97 | } |
| 98 | |
| 99 | labtab->address = rep; |
| 100 | |
| 101 | dechain(); |
| 102 | |
| 103 | /* abort(); /*DEBUG*/ |
| 104 | |
| 105 | if(eargc <= 0) |
| 106 | execute((char *)NULL); |
| 107 | else while(--eargc >= 0) { |
| 108 | execute(*eargv++); |
| 109 | } |
| 110 | fclose(stdout); |
| 111 | exit(0); |
| 112 | } |
| 113 | fcomp() |
| 114 | { |
| 115 | |
| 116 | register char *p, *op, *tp; |
| 117 | char *address(); |
| 118 | union reptr *pt, *pt1; |
| 119 | int i; |
| 120 | struct label *lpt; |
| 121 | |
| 122 | op = lastre; |
| 123 | |
| 124 | if(rline(linebuf) < 0) return; |
| 125 | if(*linebuf == '#') { |
| 126 | if(linebuf[1] == 'n') |
| 127 | nflag = 1; |
| 128 | } |
| 129 | else { |
| 130 | cp = linebuf; |
| 131 | goto comploop; |
| 132 | } |
| 133 | |
| 134 | for(;;) { |
| 135 | if(rline(linebuf) < 0) break; |
| 136 | |
| 137 | cp = linebuf; |
| 138 | |
| 139 | comploop: |
| 140 | /* fprintf(stdout, "cp: %s\n", cp); /*DEBUG*/ |
| 141 | while(*cp == ' ' || *cp == '\t') cp++; |
| 142 | if(*cp == '\0' || *cp == '#') continue; |
| 143 | if(*cp == ';') { |
| 144 | cp++; |
| 145 | goto comploop; |
| 146 | } |
| 147 | |
| 148 | p = address(rep->ad1); |
| 149 | if(p == badp) { |
| 150 | fprintf(stderr, CGMES, linebuf); |
| 151 | exit(2); |
| 152 | } |
| 153 | |
| 154 | if(p == rep->ad1) { |
| 155 | if(op) |
| 156 | rep->ad1 = op; |
| 157 | else { |
| 158 | fprintf(stderr, "First RE may not be null\n"); |
| 159 | exit(2); |
| 160 | } |
| 161 | } else if(p == 0) { |
| 162 | p = rep->ad1; |
| 163 | rep->ad1 = 0; |
| 164 | } else { |
| 165 | op = rep->ad1; |
| 166 | if(*cp == ',' || *cp == ';') { |
| 167 | cp++; |
| 168 | if((rep->ad2 = p) > reend) { |
| 169 | fprintf(stderr, TMMES, linebuf); |
| 170 | exit(2); |
| 171 | } |
| 172 | p = address(rep->ad2); |
| 173 | if(p == badp || p == 0) { |
| 174 | fprintf(stderr, CGMES, linebuf); |
| 175 | exit(2); |
| 176 | } |
| 177 | if(p == rep->ad2) |
| 178 | rep->ad2 = op; |
| 179 | else |
| 180 | op = rep->ad2; |
| 181 | |
| 182 | } else |
| 183 | rep->ad2 = 0; |
| 184 | } |
| 185 | |
| 186 | if(p > reend) { |
| 187 | fprintf(stderr, "Too much text: %s\n", linebuf); |
| 188 | exit(2); |
| 189 | } |
| 190 | |
| 191 | while(*cp == ' ' || *cp == '\t') cp++; |
| 192 | |
| 193 | swit: |
| 194 | switch(*cp++) { |
| 195 | |
| 196 | default: |
| 197 | fprintf(stderr, "Unrecognized command: %s\n", linebuf); |
| 198 | exit(2); |
| 199 | |
| 200 | case '!': |
| 201 | rep->negfl = 1; |
| 202 | goto swit; |
| 203 | |
| 204 | case '{': |
| 205 | rep->command = BCOM; |
| 206 | rep->negfl = !(rep->negfl); |
| 207 | cmpend[depth++] = &rep->lb1; |
| 208 | if(++rep >= ptrend) { |
| 209 | fprintf(stderr, "Too many commands: %s\n", linebuf); |
| 210 | exit(2); |
| 211 | } |
| 212 | rep->ad1 = p; |
| 213 | if(*cp == '\0') continue; |
| 214 | |
| 215 | goto comploop; |
| 216 | |
| 217 | case '}': |
| 218 | if(rep->ad1) { |
| 219 | fprintf(stderr, AD0MES, linebuf); |
| 220 | exit(2); |
| 221 | } |
| 222 | |
| 223 | if(--depth < 0) { |
| 224 | fprintf(stderr, "Too many }'s\n"); |
| 225 | exit(2); |
| 226 | } |
| 227 | *cmpend[depth] = rep; |
| 228 | |
| 229 | rep->ad1 = p; |
| 230 | continue; |
| 231 | |
| 232 | case '=': |
| 233 | rep->command = EQCOM; |
| 234 | if(rep->ad2) { |
| 235 | fprintf(stderr, AD1MES, linebuf); |
| 236 | exit(2); |
| 237 | } |
| 238 | break; |
| 239 | |
| 240 | case ':': |
| 241 | if(rep->ad1) { |
| 242 | fprintf(stderr, AD0MES, linebuf); |
| 243 | exit(2); |
| 244 | } |
| 245 | |
| 246 | while(*cp++ == ' '); |
| 247 | cp--; |
| 248 | |
| 249 | |
| 250 | tp = lab->asc; |
| 251 | while((*tp++ = *cp++)) |
| 252 | if(tp >= &(lab->asc[8])) { |
| 253 | fprintf(stderr, LTL, linebuf); |
| 254 | exit(2); |
| 255 | } |
| 256 | *--tp = '\0'; |
| 257 | |
| 258 | if(lpt = search(lab)) { |
| 259 | if(lpt->address) { |
| 260 | fprintf(stderr, "Duplicate labels: %s\n", linebuf); |
| 261 | exit(2); |
| 262 | } |
| 263 | } else { |
| 264 | lab->chain = 0; |
| 265 | lpt = lab; |
| 266 | if(++lab >= labend) { |
| 267 | fprintf(stderr, "Too many labels: %s\n", linebuf); |
| 268 | exit(2); |
| 269 | } |
| 270 | } |
| 271 | lpt->address = rep; |
| 272 | rep->ad1 = p; |
| 273 | |
| 274 | continue; |
| 275 | |
| 276 | case 'a': |
| 277 | rep->command = ACOM; |
| 278 | if(rep->ad2) { |
| 279 | fprintf(stderr, AD1MES, linebuf); |
| 280 | exit(2); |
| 281 | } |
| 282 | if(*cp == '\\') cp++; |
| 283 | if(*cp++ != '\n') { |
| 284 | fprintf(stderr, CGMES, linebuf); |
| 285 | exit(2); |
| 286 | } |
| 287 | rep->re1 = p; |
| 288 | p = text(rep->re1); |
| 289 | break; |
| 290 | case 'c': |
| 291 | rep->command = CCOM; |
| 292 | if(*cp == '\\') cp++; |
| 293 | if(*cp++ != ('\n')) { |
| 294 | fprintf(stderr, CGMES, linebuf); |
| 295 | exit(2); |
| 296 | } |
| 297 | rep->re1 = p; |
| 298 | p = text(rep->re1); |
| 299 | break; |
| 300 | case 'i': |
| 301 | rep->command = ICOM; |
| 302 | if(rep->ad2) { |
| 303 | fprintf(stderr, AD1MES, linebuf); |
| 304 | exit(2); |
| 305 | } |
| 306 | if(*cp == '\\') cp++; |
| 307 | if(*cp++ != ('\n')) { |
| 308 | fprintf(stderr, CGMES, linebuf); |
| 309 | exit(2); |
| 310 | } |
| 311 | rep->re1 = p; |
| 312 | p = text(rep->re1); |
| 313 | break; |
| 314 | |
| 315 | case 'g': |
| 316 | rep->command = GCOM; |
| 317 | break; |
| 318 | |
| 319 | case 'G': |
| 320 | rep->command = CGCOM; |
| 321 | break; |
| 322 | |
| 323 | case 'h': |
| 324 | rep->command = HCOM; |
| 325 | break; |
| 326 | |
| 327 | case 'H': |
| 328 | rep->command = CHCOM; |
| 329 | break; |
| 330 | |
| 331 | case 't': |
| 332 | rep->command = TCOM; |
| 333 | goto jtcommon; |
| 334 | |
| 335 | case 'b': |
| 336 | rep->command = BCOM; |
| 337 | jtcommon: |
| 338 | while(*cp++ == ' '); |
| 339 | cp--; |
| 340 | |
| 341 | if(*cp == '\0') { |
| 342 | if(pt = labtab->chain) { |
| 343 | while(pt1 = pt->lb1) |
| 344 | pt = pt1; |
| 345 | pt->lb1 = rep; |
| 346 | } else |
| 347 | labtab->chain = rep; |
| 348 | break; |
| 349 | } |
| 350 | tp = lab->asc; |
| 351 | while((*tp++ = *cp++)) |
| 352 | if(tp >= &(lab->asc[8])) { |
| 353 | fprintf(stderr, LTL, linebuf); |
| 354 | exit(2); |
| 355 | } |
| 356 | cp--; |
| 357 | *--tp = '\0'; |
| 358 | |
| 359 | if(lpt = search(lab)) { |
| 360 | if(lpt->address) { |
| 361 | rep->lb1 = lpt->address; |
| 362 | } else { |
| 363 | pt = lpt->chain; |
| 364 | while(pt1 = pt->lb1) |
| 365 | pt = pt1; |
| 366 | pt->lb1 = rep; |
| 367 | } |
| 368 | } else { |
| 369 | lab->chain = rep; |
| 370 | lab->address = 0; |
| 371 | if(++lab >= labend) { |
| 372 | fprintf(stderr, "Too many labels: %s\n", linebuf); |
| 373 | exit(2); |
| 374 | } |
| 375 | } |
| 376 | break; |
| 377 | |
| 378 | case 'n': |
| 379 | rep->command = NCOM; |
| 380 | break; |
| 381 | |
| 382 | case 'N': |
| 383 | rep->command = CNCOM; |
| 384 | break; |
| 385 | |
| 386 | case 'p': |
| 387 | rep->command = PCOM; |
| 388 | break; |
| 389 | |
| 390 | case 'P': |
| 391 | rep->command = CPCOM; |
| 392 | break; |
| 393 | |
| 394 | case 'r': |
| 395 | rep->command = RCOM; |
| 396 | if(rep->ad2) { |
| 397 | fprintf(stderr, AD1MES, linebuf); |
| 398 | exit(2); |
| 399 | } |
| 400 | if(*cp++ != ' ') { |
| 401 | fprintf(stderr, CGMES, linebuf); |
| 402 | exit(2); |
| 403 | } |
| 404 | rep->re1 = p; |
| 405 | p = text(rep->re1); |
| 406 | break; |
| 407 | |
| 408 | case 'd': |
| 409 | rep->command = DCOM; |
| 410 | break; |
| 411 | |
| 412 | case 'D': |
| 413 | rep->command = CDCOM; |
| 414 | rep->lb1 = ptrspace; |
| 415 | break; |
| 416 | |
| 417 | case 'q': |
| 418 | rep->command = QCOM; |
| 419 | if(rep->ad2) { |
| 420 | fprintf(stderr, AD1MES, linebuf); |
| 421 | exit(2); |
| 422 | } |
| 423 | break; |
| 424 | |
| 425 | case 'l': |
| 426 | rep->command = LCOM; |
| 427 | break; |
| 428 | |
| 429 | case 's': |
| 430 | rep->command = SCOM; |
| 431 | seof = *cp++; |
| 432 | rep->re1 = p; |
| 433 | p = compile(rep->re1); |
| 434 | if(p == badp) { |
| 435 | fprintf(stderr, CGMES, linebuf); |
| 436 | exit(2); |
| 437 | } |
| 438 | if(p == rep->re1) { |
| 439 | rep->re1 = op; |
| 440 | } else { |
| 441 | op = rep->re1; |
| 442 | } |
| 443 | |
| 444 | if((rep->rhs = p) > reend) { |
| 445 | fprintf(stderr, TMMES, linebuf); |
| 446 | exit(2); |
| 447 | } |
| 448 | |
| 449 | if((p = compsub(rep->rhs)) == badp) { |
| 450 | fprintf(stderr, CGMES, linebuf); |
| 451 | exit(2); |
| 452 | } |
| 453 | if(*cp == 'g') { |
| 454 | cp++; |
| 455 | rep->gfl++; |
| 456 | } else if(gflag) |
| 457 | rep->gfl++; |
| 458 | |
| 459 | if(*cp == 'p') { |
| 460 | cp++; |
| 461 | rep->pfl = 1; |
| 462 | } |
| 463 | |
| 464 | if(*cp == 'P') { |
| 465 | cp++; |
| 466 | rep->pfl = 2; |
| 467 | } |
| 468 | |
| 469 | if(*cp == 'w') { |
| 470 | cp++; |
| 471 | if(*cp++ != ' ') { |
| 472 | fprintf(stderr, CGMES, linebuf); |
| 473 | exit(2); |
| 474 | } |
| 475 | if(nfiles >= 10) { |
| 476 | fprintf(stderr, "Too many files in w commands\n"); |
| 477 | exit(2); |
| 478 | } |
| 479 | |
| 480 | text(fname[nfiles]); |
| 481 | for(i = nfiles - 1; i >= 0; i--) |
| 482 | if(cmp(fname[nfiles],fname[i]) == 0) { |
| 483 | rep->fcode = fcode[i]; |
| 484 | goto done; |
| 485 | } |
| 486 | if((rep->fcode = fopen(fname[nfiles], "w")) == NULL) { |
| 487 | fprintf(stderr, "cannot open %s\n", fname[nfiles]); |
| 488 | exit(2); |
| 489 | } |
| 490 | fcode[nfiles++] = rep->fcode; |
| 491 | } |
| 492 | break; |
| 493 | |
| 494 | case 'w': |
| 495 | rep->command = WCOM; |
| 496 | if(*cp++ != ' ') { |
| 497 | fprintf(stderr, CGMES, linebuf); |
| 498 | exit(2); |
| 499 | } |
| 500 | if(nfiles >= 10){ |
| 501 | fprintf(stderr, "Too many files in w commands\n"); |
| 502 | exit(2); |
| 503 | } |
| 504 | |
| 505 | text(fname[nfiles]); |
| 506 | for(i = nfiles - 1; i >= 0; i--) |
| 507 | if(cmp(fname[nfiles], fname[i]) == 0) { |
| 508 | rep->fcode = fcode[i]; |
| 509 | goto done; |
| 510 | } |
| 511 | |
| 512 | if((rep->fcode = fopen(fname[nfiles], "w")) == NULL) { |
| 513 | fprintf(stderr, "Cannot create %s\n", fname[nfiles]); |
| 514 | exit(2); |
| 515 | } |
| 516 | fcode[nfiles++] = rep->fcode; |
| 517 | break; |
| 518 | |
| 519 | case 'x': |
| 520 | rep->command = XCOM; |
| 521 | break; |
| 522 | |
| 523 | case 'y': |
| 524 | rep->command = YCOM; |
| 525 | seof = *cp++; |
| 526 | rep->re1 = p; |
| 527 | p = ycomp(rep->re1); |
| 528 | if(p == badp) { |
| 529 | fprintf(stderr, CGMES, linebuf); |
| 530 | exit(2); |
| 531 | } |
| 532 | if(p > reend) { |
| 533 | fprintf(stderr, TMMES, linebuf); |
| 534 | exit(2); |
| 535 | } |
| 536 | break; |
| 537 | |
| 538 | } |
| 539 | done: |
| 540 | if(++rep >= ptrend) { |
| 541 | fprintf(stderr, "Too many commands, last: %s\n", linebuf); |
| 542 | exit(2); |
| 543 | } |
| 544 | |
| 545 | rep->ad1 = p; |
| 546 | |
| 547 | if(*cp++ != '\0') { |
| 548 | if(cp[-1] == ';') |
| 549 | goto comploop; |
| 550 | fprintf(stderr, CGMES, linebuf); |
| 551 | exit(2); |
| 552 | } |
| 553 | |
| 554 | } |
| 555 | rep->command = 0; |
| 556 | lastre = op; |
| 557 | } |
| 558 | char *compsub(rhsbuf) |
| 559 | char *rhsbuf; |
| 560 | { |
| 561 | register char *p, *q; |
| 562 | |
| 563 | p = rhsbuf; |
| 564 | q = cp; |
| 565 | for(;;) { |
| 566 | if((*p = *q++) == '\\') { |
| 567 | *p = *q++; |
| 568 | if(*p > numbra + '0' && *p <= '9') |
| 569 | return(badp); |
| 570 | *p++ |= 0200; |
| 571 | continue; |
| 572 | } |
| 573 | if(*p == seof) { |
| 574 | *p++ = '\0'; |
| 575 | cp = q; |
| 576 | return(p); |
| 577 | } |
| 578 | if(*p++ == '\0') { |
| 579 | return(badp); |
| 580 | } |
| 581 | |
| 582 | } |
| 583 | } |
| 584 | |
| 585 | char *compile(expbuf) |
| 586 | char *expbuf; |
| 587 | { |
| 588 | register c; |
| 589 | register char *ep, *sp; |
| 590 | char neg; |
| 591 | char *lastep, *cstart; |
| 592 | int cclcnt; |
| 593 | int closed; |
| 594 | char bracket[NBRA], *bracketp; |
| 595 | |
| 596 | if(*cp == seof) { |
| 597 | cp++; |
| 598 | return(expbuf); |
| 599 | } |
| 600 | |
| 601 | ep = expbuf; |
| 602 | lastep = 0; |
| 603 | bracketp = bracket; |
| 604 | closed = numbra = 0; |
| 605 | sp = cp; |
| 606 | if (*sp == '^') { |
| 607 | *ep++ = 1; |
| 608 | sp++; |
| 609 | } else { |
| 610 | *ep++ = 0; |
| 611 | } |
| 612 | for (;;) { |
| 613 | if (ep >= &expbuf[ESIZE]) { |
| 614 | cp = sp; |
| 615 | return(badp); |
| 616 | } |
| 617 | if((c = *sp++) == seof) { |
| 618 | if(bracketp != bracket) { |
| 619 | cp = sp; |
| 620 | return(badp); |
| 621 | } |
| 622 | cp = sp; |
| 623 | *ep++ = CEOF; |
| 624 | return(ep); |
| 625 | } |
| 626 | if(c != '*') |
| 627 | lastep = ep; |
| 628 | switch (c) { |
| 629 | |
| 630 | case '\\': |
| 631 | if((c = *sp++) == '(') { |
| 632 | if(numbra >= NBRA) { |
| 633 | cp = sp; |
| 634 | return(badp); |
| 635 | } |
| 636 | *bracketp++ = numbra; |
| 637 | *ep++ = CBRA; |
| 638 | *ep++ = numbra++; |
| 639 | continue; |
| 640 | } |
| 641 | if(c == ')') { |
| 642 | if(bracketp <= bracket) { |
| 643 | cp = sp; |
| 644 | return(badp); |
| 645 | } |
| 646 | *ep++ = CKET; |
| 647 | *ep++ = *--bracketp; |
| 648 | closed++; |
| 649 | continue; |
| 650 | } |
| 651 | |
| 652 | if(c >= '1' && c <= '9') { |
| 653 | if((c -= '1') >= closed) |
| 654 | return(badp); |
| 655 | |
| 656 | *ep++ = CBACK; |
| 657 | *ep++ = c; |
| 658 | continue; |
| 659 | } |
| 660 | if(c == '\n') { |
| 661 | cp = sp; |
| 662 | return(badp); |
| 663 | } |
| 664 | if(c == 'n') { |
| 665 | c = '\n'; |
| 666 | } |
| 667 | goto defchar; |
| 668 | |
| 669 | case '\0': |
| 670 | continue; |
| 671 | case '\n': |
| 672 | cp = sp; |
| 673 | return(badp); |
| 674 | |
| 675 | case '.': |
| 676 | *ep++ = CDOT; |
| 677 | continue; |
| 678 | |
| 679 | case '*': |
| 680 | if (lastep == 0) |
| 681 | goto defchar; |
| 682 | if(*lastep == CKET) { |
| 683 | cp = sp; |
| 684 | return(badp); |
| 685 | } |
| 686 | *lastep |= STAR; |
| 687 | continue; |
| 688 | |
| 689 | case '$': |
| 690 | if (*sp != seof) |
| 691 | goto defchar; |
| 692 | *ep++ = CDOL; |
| 693 | continue; |
| 694 | |
| 695 | case '[': |
| 696 | if(&ep[17] >= &expbuf[ESIZE]) { |
| 697 | fprintf(stderr, "RE too long: %s\n", linebuf); |
| 698 | exit(2); |
| 699 | } |
| 700 | |
| 701 | *ep++ = CCL; |
| 702 | |
| 703 | neg = 0; |
| 704 | if((c = *sp++) == '^') { |
| 705 | neg = 1; |
| 706 | c = *sp++; |
| 707 | } |
| 708 | |
| 709 | cstart = sp; |
| 710 | do { |
| 711 | if(c == '\0') { |
| 712 | fprintf(stderr, CGMES, linebuf); |
| 713 | exit(2); |
| 714 | } |
| 715 | if (c=='-' && sp>cstart && *sp!=']') { |
| 716 | for (c = sp[-2]; c<*sp; c++) |
| 717 | ep[c>>3] |= bittab[c&07]; |
| 718 | } |
| 719 | if(c == '\\') { |
| 720 | switch(c = *sp++) { |
| 721 | case 'n': |
| 722 | c = '\n'; |
| 723 | break; |
| 724 | } |
| 725 | } |
| 726 | |
| 727 | ep[c >> 3] |= bittab[c & 07]; |
| 728 | } while((c = *sp++) != ']'); |
| 729 | |
| 730 | if(neg) |
| 731 | for(cclcnt = 0; cclcnt < 16; cclcnt++) |
| 732 | ep[cclcnt] ^= -1; |
| 733 | ep[0] &= 0376; |
| 734 | |
| 735 | ep += 16; |
| 736 | |
| 737 | continue; |
| 738 | |
| 739 | defchar: |
| 740 | default: |
| 741 | *ep++ = CCHR; |
| 742 | *ep++ = c; |
| 743 | } |
| 744 | } |
| 745 | } |
| 746 | rline(lbuf) |
| 747 | char *lbuf; |
| 748 | { |
| 749 | register char *p, *q; |
| 750 | register t; |
| 751 | static char *saveq; |
| 752 | |
| 753 | p = lbuf - 1; |
| 754 | |
| 755 | if(eflag) { |
| 756 | if(eflag > 0) { |
| 757 | eflag = -1; |
| 758 | if(eargc-- <= 0) |
| 759 | exit(2); |
| 760 | q = *++eargv; |
| 761 | while(*++p = *q++) { |
| 762 | if(*p == '\\') { |
| 763 | if((*++p = *q++) == '\0') { |
| 764 | saveq = 0; |
| 765 | return(-1); |
| 766 | } else |
| 767 | continue; |
| 768 | } |
| 769 | if(*p == '\n') { |
| 770 | *p = '\0'; |
| 771 | saveq = q; |
| 772 | return(1); |
| 773 | } |
| 774 | } |
| 775 | saveq = 0; |
| 776 | return(1); |
| 777 | } |
| 778 | if((q = saveq) == 0) return(-1); |
| 779 | |
| 780 | while(*++p = *q++) { |
| 781 | if(*p == '\\') { |
| 782 | if((*++p = *q++) == '0') { |
| 783 | saveq = 0; |
| 784 | return(-1); |
| 785 | } else |
| 786 | continue; |
| 787 | } |
| 788 | if(*p == '\n') { |
| 789 | *p = '\0'; |
| 790 | saveq = q; |
| 791 | return(1); |
| 792 | } |
| 793 | } |
| 794 | saveq = 0; |
| 795 | return(1); |
| 796 | } |
| 797 | |
| 798 | while((t = getc(fin)) != EOF) { |
| 799 | *++p = t; |
| 800 | if(*p == '\\') { |
| 801 | t = getc(fin); |
| 802 | *++p = t; |
| 803 | } |
| 804 | else if(*p == '\n') { |
| 805 | *p = '\0'; |
| 806 | return(1); |
| 807 | } |
| 808 | } |
| 809 | *++p = '\0'; |
| 810 | return(-1); |
| 811 | } |
| 812 | |
| 813 | char *address(expbuf) |
| 814 | char *expbuf; |
| 815 | { |
| 816 | register char *rcp; |
| 817 | long lno; |
| 818 | |
| 819 | if(*cp == '$') { |
| 820 | cp++; |
| 821 | *expbuf++ = CEND; |
| 822 | *expbuf++ = CEOF; |
| 823 | return(expbuf); |
| 824 | } |
| 825 | |
| 826 | if(*cp == '/') { |
| 827 | seof = '/'; |
| 828 | cp++; |
| 829 | return(compile(expbuf)); |
| 830 | } |
| 831 | |
| 832 | rcp = cp; |
| 833 | lno = 0; |
| 834 | |
| 835 | while(*rcp >= '0' && *rcp <= '9') |
| 836 | lno = lno*10 + *rcp++ - '0'; |
| 837 | |
| 838 | if(rcp > cp) { |
| 839 | *expbuf++ = CLNUM; |
| 840 | *expbuf++ = nlno; |
| 841 | tlno[nlno++] = lno; |
| 842 | if(nlno >= NLINES) { |
| 843 | fprintf(stderr, "Too many line numbers\n"); |
| 844 | exit(2); |
| 845 | } |
| 846 | *expbuf++ = CEOF; |
| 847 | cp = rcp; |
| 848 | return(expbuf); |
| 849 | } |
| 850 | return(0); |
| 851 | } |
| 852 | cmp(a, b) |
| 853 | char *a,*b; |
| 854 | { |
| 855 | register char *ra, *rb; |
| 856 | |
| 857 | ra = a - 1; |
| 858 | rb = b - 1; |
| 859 | |
| 860 | while(*++ra == *++rb) |
| 861 | if(*ra == '\0') return(0); |
| 862 | return(1); |
| 863 | } |
| 864 | |
| 865 | char *text(textbuf) |
| 866 | char *textbuf; |
| 867 | { |
| 868 | register char *p, *q; |
| 869 | |
| 870 | p = textbuf; |
| 871 | q = cp; |
| 872 | while(*q == '\t' || *q == ' ') q++; |
| 873 | for(;;) { |
| 874 | |
| 875 | if((*p = *q++) == '\\') |
| 876 | *p = *q++; |
| 877 | if(*p == '\0') { |
| 878 | cp = --q; |
| 879 | return(++p); |
| 880 | } |
| 881 | if(*p == '\n') { |
| 882 | while(*q == '\t' || *q == ' ') q++; |
| 883 | } |
| 884 | p++; |
| 885 | } |
| 886 | } |
| 887 | |
| 888 | |
| 889 | struct label *search(ptr) |
| 890 | struct label *ptr; |
| 891 | { |
| 892 | struct label *rp; |
| 893 | |
| 894 | rp = labtab; |
| 895 | while(rp < ptr) { |
| 896 | if(cmp(rp->asc, ptr->asc) == 0) |
| 897 | return(rp); |
| 898 | rp++; |
| 899 | } |
| 900 | |
| 901 | return(0); |
| 902 | } |
| 903 | |
| 904 | |
| 905 | dechain() |
| 906 | { |
| 907 | struct label *lptr; |
| 908 | union reptr *rptr, *trptr; |
| 909 | |
| 910 | for(lptr = labtab; lptr < lab; lptr++) { |
| 911 | |
| 912 | if(lptr->address == 0) { |
| 913 | fprintf(stderr, "Undefined label: %s\n", lptr->asc); |
| 914 | exit(2); |
| 915 | } |
| 916 | |
| 917 | if(lptr->chain) { |
| 918 | rptr = lptr->chain; |
| 919 | while(trptr = rptr->lb1) { |
| 920 | rptr->lb1 = lptr->address; |
| 921 | rptr = trptr; |
| 922 | } |
| 923 | rptr->lb1 = lptr->address; |
| 924 | } |
| 925 | } |
| 926 | } |
| 927 | |
| 928 | char *ycomp(expbuf) |
| 929 | char *expbuf; |
| 930 | { |
| 931 | register char c, *ep, *tsp; |
| 932 | char *sp; |
| 933 | |
| 934 | ep = expbuf; |
| 935 | sp = cp; |
| 936 | for(tsp = cp; *tsp != seof; tsp++) { |
| 937 | if(*tsp == '\\') |
| 938 | tsp++; |
| 939 | if(*tsp == '\n') |
| 940 | return(badp); |
| 941 | } |
| 942 | tsp++; |
| 943 | |
| 944 | while((c = *sp++ & 0177) != seof) { |
| 945 | if(c == '\\' && *sp == 'n') { |
| 946 | sp++; |
| 947 | c = '\n'; |
| 948 | } |
| 949 | if((ep[c] = *tsp++) == '\\' && *tsp == 'n') { |
| 950 | ep[c] = '\n'; |
| 951 | tsp++; |
| 952 | } |
| 953 | if(ep[c] == seof || ep[c] == '\0') |
| 954 | return(badp); |
| 955 | } |
| 956 | if(*tsp != seof) |
| 957 | return(badp); |
| 958 | cp = ++tsp; |
| 959 | |
| 960 | for(c = 0; !(c & 0200); c++) |
| 961 | if(ep[c] == 0) |
| 962 | ep[c] = c; |
| 963 | |
| 964 | return(ep + 0200); |
| 965 | } |
| 966 | |