| 1 | /* Copyright (c) 1979 Regents of the University of California */ |
| 2 | #include "ex.h" |
| 3 | #include "ex_re.h" |
| 4 | #include "ex_tty.h" |
| 5 | #include "ex_vis.h" |
| 6 | |
| 7 | /* |
| 8 | * Random routines, in alphabetical order. |
| 9 | */ |
| 10 | |
| 11 | any(c, s) |
| 12 | int c; |
| 13 | register char *s; |
| 14 | { |
| 15 | register int x; |
| 16 | |
| 17 | while (x = *s++) |
| 18 | if (x == c) |
| 19 | return (1); |
| 20 | return (0); |
| 21 | } |
| 22 | |
| 23 | backtab(i) |
| 24 | register int i; |
| 25 | { |
| 26 | register int j; |
| 27 | |
| 28 | j = i % value(SHIFTWIDTH); |
| 29 | if (j == 0) |
| 30 | j = value(SHIFTWIDTH); |
| 31 | i -= j; |
| 32 | if (i < 0) |
| 33 | i = 0; |
| 34 | return (i); |
| 35 | } |
| 36 | |
| 37 | change() |
| 38 | { |
| 39 | |
| 40 | tchng++; |
| 41 | chng = tchng; |
| 42 | } |
| 43 | |
| 44 | /* |
| 45 | * Column returns the number of |
| 46 | * columns occupied by printing the |
| 47 | * characters through position cp of the |
| 48 | * current line. |
| 49 | */ |
| 50 | column(cp) |
| 51 | register char *cp; |
| 52 | { |
| 53 | |
| 54 | if (cp == 0) |
| 55 | cp = &linebuf[LBSIZE - 2]; |
| 56 | return (qcolumn(cp, (char *) 0)); |
| 57 | } |
| 58 | |
| 59 | Copy(to, from, size) |
| 60 | register char *from, *to; |
| 61 | register int size; |
| 62 | { |
| 63 | |
| 64 | if (size > 0) |
| 65 | do |
| 66 | *to++ = *from++; |
| 67 | while (--size > 0); |
| 68 | } |
| 69 | |
| 70 | copyw(to, from, size) |
| 71 | register line *from, *to; |
| 72 | register int size; |
| 73 | { |
| 74 | |
| 75 | if (size > 0) |
| 76 | do |
| 77 | *to++ = *from++; |
| 78 | while (--size > 0); |
| 79 | } |
| 80 | |
| 81 | copywR(to, from, size) |
| 82 | register line *from, *to; |
| 83 | register int size; |
| 84 | { |
| 85 | |
| 86 | while (--size >= 0) |
| 87 | to[size] = from[size]; |
| 88 | } |
| 89 | |
| 90 | ctlof(c) |
| 91 | int c; |
| 92 | { |
| 93 | |
| 94 | return (c == TRIM ? '?' : c | ('A' - 1)); |
| 95 | } |
| 96 | |
| 97 | dingdong() |
| 98 | { |
| 99 | |
| 100 | if (VB) |
| 101 | putpad(VB); |
| 102 | else if (value(ERRORBELLS)) |
| 103 | putch('\207'); |
| 104 | } |
| 105 | |
| 106 | fixindent(indent) |
| 107 | int indent; |
| 108 | { |
| 109 | register int i; |
| 110 | register char *cp; |
| 111 | |
| 112 | i = whitecnt(genbuf); |
| 113 | cp = vpastwh(genbuf); |
| 114 | if (*cp == 0 && i == indent && linebuf[0] == 0) { |
| 115 | genbuf[0] = 0; |
| 116 | return (i); |
| 117 | } |
| 118 | CP(genindent(i), cp); |
| 119 | return (i); |
| 120 | } |
| 121 | |
| 122 | filioerr(cp) |
| 123 | char *cp; |
| 124 | { |
| 125 | register int oerrno = errno; |
| 126 | |
| 127 | lprintf("\"%s\"", cp); |
| 128 | errno = oerrno; |
| 129 | syserror(); |
| 130 | } |
| 131 | |
| 132 | char * |
| 133 | genindent(indent) |
| 134 | register int indent; |
| 135 | { |
| 136 | register char *cp; |
| 137 | |
| 138 | for (cp = genbuf; indent >= value(TABSTOP); indent -= value(TABSTOP)) |
| 139 | *cp++ = '\t'; |
| 140 | for (; indent > 0; indent--) |
| 141 | *cp++ = ' '; |
| 142 | return (cp); |
| 143 | } |
| 144 | |
| 145 | getDOT() |
| 146 | { |
| 147 | |
| 148 | getline(*dot); |
| 149 | } |
| 150 | |
| 151 | line * |
| 152 | getmark(c) |
| 153 | register int c; |
| 154 | { |
| 155 | register line *addr; |
| 156 | |
| 157 | for (addr = one; addr <= dol; addr++) |
| 158 | if (names[c - 'a'] == (*addr &~ 01)) { |
| 159 | return (addr); |
| 160 | } |
| 161 | return (0); |
| 162 | } |
| 163 | |
| 164 | getn(cp) |
| 165 | register char *cp; |
| 166 | { |
| 167 | register int i = 0; |
| 168 | |
| 169 | while (isdigit(*cp)) |
| 170 | i = i * 10 + *cp++ - '0'; |
| 171 | if (*cp) |
| 172 | return (0); |
| 173 | return (i); |
| 174 | } |
| 175 | |
| 176 | ignnEOF() |
| 177 | { |
| 178 | register int c = getchar(); |
| 179 | |
| 180 | if (c == EOF) |
| 181 | ungetchar(c); |
| 182 | } |
| 183 | |
| 184 | iswhite(c) |
| 185 | int c; |
| 186 | { |
| 187 | |
| 188 | return (c == ' ' || c == '\t'); |
| 189 | } |
| 190 | |
| 191 | junk(c) |
| 192 | register int c; |
| 193 | { |
| 194 | |
| 195 | if (c && !value(BEAUTIFY)) |
| 196 | return (0); |
| 197 | if (c >= ' ' && c != TRIM) |
| 198 | return (0); |
| 199 | switch (c) { |
| 200 | |
| 201 | case '\t': |
| 202 | case '\n': |
| 203 | case '\f': |
| 204 | return (0); |
| 205 | |
| 206 | default: |
| 207 | return (1); |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | killed() |
| 212 | { |
| 213 | |
| 214 | killcnt(addr2 - addr1 + 1); |
| 215 | } |
| 216 | |
| 217 | killcnt(cnt) |
| 218 | register int cnt; |
| 219 | { |
| 220 | |
| 221 | if (inopen) { |
| 222 | notecnt = cnt; |
| 223 | notenam = notesgn = ""; |
| 224 | return; |
| 225 | } |
| 226 | if (!notable(cnt)) |
| 227 | return; |
| 228 | printf("%d lines", cnt); |
| 229 | if (value(TERSE) == 0) { |
| 230 | printf(" %c%s", Command[0] | ' ', Command + 1); |
| 231 | if (Command[strlen(Command) - 1] != 'e') |
| 232 | putchar('e'); |
| 233 | putchar('d'); |
| 234 | } |
| 235 | putNFL(); |
| 236 | } |
| 237 | |
| 238 | lineno(a) |
| 239 | line *a; |
| 240 | { |
| 241 | |
| 242 | return (a - zero); |
| 243 | } |
| 244 | |
| 245 | lineDOL() |
| 246 | { |
| 247 | |
| 248 | return (lineno(dol)); |
| 249 | } |
| 250 | |
| 251 | lineDOT() |
| 252 | { |
| 253 | |
| 254 | return (lineno(dot)); |
| 255 | } |
| 256 | |
| 257 | markDOT() |
| 258 | { |
| 259 | |
| 260 | markpr(dot); |
| 261 | } |
| 262 | |
| 263 | markpr(which) |
| 264 | line *which; |
| 265 | { |
| 266 | |
| 267 | if ((inglobal == 0 || inopen) && which <= endcore) { |
| 268 | names['z'-'a'+1] = *which & ~01; |
| 269 | if (inopen) |
| 270 | ncols['z'-'a'+1] = cursor; |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | markreg(c) |
| 275 | register int c; |
| 276 | { |
| 277 | |
| 278 | if (c == '\'' || c == '`') |
| 279 | return ('z' + 1); |
| 280 | if (c >= 'a' && c <= 'z') |
| 281 | return (c); |
| 282 | return (0); |
| 283 | } |
| 284 | |
| 285 | /* |
| 286 | * Mesg decodes the terse/verbose strings. Thus |
| 287 | * 'xxx@yyy' -> 'xxx' if terse, else 'xxx yyy' |
| 288 | * 'xxx|yyy' -> 'xxx' if terse, else 'yyy' |
| 289 | * All others map to themselves. |
| 290 | */ |
| 291 | char * |
| 292 | mesg(str) |
| 293 | register char *str; |
| 294 | { |
| 295 | register char *cp; |
| 296 | |
| 297 | str = strcpy(genbuf, str); |
| 298 | for (cp = str; *cp; cp++) |
| 299 | switch (*cp) { |
| 300 | |
| 301 | case '@': |
| 302 | if (value(TERSE)) |
| 303 | *cp = 0; |
| 304 | else |
| 305 | *cp = ' '; |
| 306 | break; |
| 307 | |
| 308 | case '|': |
| 309 | if (value(TERSE) == 0) |
| 310 | return (cp + 1); |
| 311 | *cp = 0; |
| 312 | break; |
| 313 | } |
| 314 | return (str); |
| 315 | } |
| 316 | |
| 317 | /*VARARGS2*/ |
| 318 | merror(seekpt, i) |
| 319 | #ifdef lint |
| 320 | char *seekpt; |
| 321 | #else |
| 322 | int seekpt; |
| 323 | #endif |
| 324 | int i; |
| 325 | { |
| 326 | register char *cp = linebuf; |
| 327 | |
| 328 | if (seekpt == 0) |
| 329 | return; |
| 330 | merror1(seekpt); |
| 331 | if (*cp == '\n') |
| 332 | putnl(), cp++; |
| 333 | if (inopen && CE) |
| 334 | vclreol(); |
| 335 | if (SO && SE) |
| 336 | putpad(SO); |
| 337 | printf(mesg(cp), i); |
| 338 | if (SO && SE) |
| 339 | putpad(SE); |
| 340 | } |
| 341 | |
| 342 | merror1(seekpt) |
| 343 | #ifdef lint |
| 344 | char *seekpt; |
| 345 | #else |
| 346 | int seekpt; |
| 347 | #endif |
| 348 | { |
| 349 | |
| 350 | lseek(erfile, (long) seekpt, 0); |
| 351 | if (read(erfile, linebuf, 128) < 2) |
| 352 | CP(linebuf, "ERROR"); |
| 353 | } |
| 354 | |
| 355 | morelines() |
| 356 | { |
| 357 | |
| 358 | if ((int) sbrk(1024 * sizeof (line)) == -1) |
| 359 | return (-1); |
| 360 | endcore += 1024; |
| 361 | return (0); |
| 362 | } |
| 363 | |
| 364 | nonzero() |
| 365 | { |
| 366 | |
| 367 | if (addr1 == zero) { |
| 368 | notempty(); |
| 369 | error("Nonzero address required@on this command"); |
| 370 | } |
| 371 | } |
| 372 | |
| 373 | notable(i) |
| 374 | int i; |
| 375 | { |
| 376 | |
| 377 | return (hush == 0 && !inglobal && i > value(REPORT)); |
| 378 | } |
| 379 | |
| 380 | |
| 381 | notempty() |
| 382 | { |
| 383 | |
| 384 | if (dol == zero) |
| 385 | error("No lines@in the buffer"); |
| 386 | } |
| 387 | |
| 388 | |
| 389 | netchHAD(cnt) |
| 390 | int cnt; |
| 391 | { |
| 392 | |
| 393 | netchange(lineDOL() - cnt); |
| 394 | } |
| 395 | |
| 396 | netchange(i) |
| 397 | register int i; |
| 398 | { |
| 399 | register char *cp; |
| 400 | |
| 401 | if (i > 0) |
| 402 | notesgn = cp = "more "; |
| 403 | else |
| 404 | notesgn = cp = "fewer ", i = -i; |
| 405 | if (inopen) { |
| 406 | notecnt = i; |
| 407 | notenam = ""; |
| 408 | return; |
| 409 | } |
| 410 | if (!notable(i)) |
| 411 | return; |
| 412 | printf(mesg("%d %slines@in file after %s"), i, cp, Command); |
| 413 | putNFL(); |
| 414 | } |
| 415 | |
| 416 | putmark(addr) |
| 417 | line *addr; |
| 418 | { |
| 419 | |
| 420 | putmk1(addr, putline()); |
| 421 | } |
| 422 | |
| 423 | putmk1(addr, n) |
| 424 | register line *addr; |
| 425 | int n; |
| 426 | { |
| 427 | register line *markp; |
| 428 | |
| 429 | *addr &= ~1; |
| 430 | for (markp = (anymarks ? names : &names['z'-'a'+1]); |
| 431 | markp <= &names['z'-'a'+1]; markp++) |
| 432 | if (*markp == *addr) |
| 433 | *markp = n; |
| 434 | *addr = n; |
| 435 | } |
| 436 | |
| 437 | char * |
| 438 | plural(i) |
| 439 | long i; |
| 440 | { |
| 441 | |
| 442 | return (i == 1 ? "" : "s"); |
| 443 | } |
| 444 | |
| 445 | int qcount(); |
| 446 | short vcntcol; |
| 447 | |
| 448 | qcolumn(lim, gp) |
| 449 | register char *lim, *gp; |
| 450 | { |
| 451 | register int x; |
| 452 | int (*OO)(); |
| 453 | |
| 454 | OO = Outchar; |
| 455 | Outchar = qcount; |
| 456 | vcntcol = 0; |
| 457 | if (lim != NULL) |
| 458 | x = lim[1], lim[1] = 0; |
| 459 | pline(0); |
| 460 | if (lim != NULL) |
| 461 | lim[1] = x; |
| 462 | if (gp) |
| 463 | while (*gp) |
| 464 | putchar(*gp++); |
| 465 | Outchar = OO; |
| 466 | return (vcntcol); |
| 467 | } |
| 468 | |
| 469 | int |
| 470 | qcount(c) |
| 471 | int c; |
| 472 | { |
| 473 | |
| 474 | if (c == '\t') { |
| 475 | vcntcol += value(TABSTOP) - vcntcol % value(TABSTOP); |
| 476 | return; |
| 477 | } |
| 478 | vcntcol++; |
| 479 | } |
| 480 | |
| 481 | reverse(a1, a2) |
| 482 | register line *a1, *a2; |
| 483 | { |
| 484 | register line t; |
| 485 | |
| 486 | for (;;) { |
| 487 | t = *--a2; |
| 488 | if (a2 <= a1) |
| 489 | return; |
| 490 | *a2 = *a1; |
| 491 | *a1++ = t; |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | save(a1, a2) |
| 496 | line *a1; |
| 497 | register line *a2; |
| 498 | { |
| 499 | register int more; |
| 500 | |
| 501 | undkind = UNDNONE; |
| 502 | undadot = dot; |
| 503 | more = (a2 - a1 + 1) - (unddol - dol); |
| 504 | while (more > (endcore - truedol)) |
| 505 | if (morelines() < 0) |
| 506 | error("Out of memory@saving lines for undo - try using ed or re"); |
| 507 | if (more) |
| 508 | (*(more > 0 ? copywR : copyw))(unddol + more + 1, unddol + 1, |
| 509 | (truedol - unddol)); |
| 510 | unddol += more; |
| 511 | truedol += more; |
| 512 | copyw(dol + 1, a1, a2 - a1 + 1); |
| 513 | undkind = UNDALL; |
| 514 | unddel = a1 - 1; |
| 515 | undap1 = a1; |
| 516 | undap2 = a2 + 1; |
| 517 | } |
| 518 | |
| 519 | save12() |
| 520 | { |
| 521 | |
| 522 | save(addr1, addr2); |
| 523 | } |
| 524 | |
| 525 | saveall() |
| 526 | { |
| 527 | |
| 528 | save(one, dol); |
| 529 | } |
| 530 | |
| 531 | span() |
| 532 | { |
| 533 | |
| 534 | return (addr2 - addr1 + 1); |
| 535 | } |
| 536 | |
| 537 | sync() |
| 538 | { |
| 539 | |
| 540 | chng = 0; |
| 541 | tchng = 0; |
| 542 | xchng = 0; |
| 543 | } |
| 544 | |
| 545 | |
| 546 | skipwh() |
| 547 | { |
| 548 | register int wh; |
| 549 | |
| 550 | wh = 0; |
| 551 | while (iswhite(peekchar())) { |
| 552 | wh++; |
| 553 | ignchar(); |
| 554 | } |
| 555 | return (wh); |
| 556 | } |
| 557 | |
| 558 | /*VARARGS2*/ |
| 559 | smerror(seekpt, cp) |
| 560 | #ifdef lint |
| 561 | char *seekpt; |
| 562 | #else |
| 563 | int seekpt; |
| 564 | #endif |
| 565 | char *cp; |
| 566 | { |
| 567 | |
| 568 | if (seekpt == 0) |
| 569 | return; |
| 570 | merror1(seekpt); |
| 571 | if (inopen && CE) |
| 572 | vclreol(); |
| 573 | if (SO && SE) |
| 574 | putpad(SO); |
| 575 | lprintf(mesg(linebuf), cp); |
| 576 | if (SO && SE) |
| 577 | putpad(SE); |
| 578 | } |
| 579 | |
| 580 | #define std_nerrs (sizeof std_errlist / sizeof std_errlist[0]) |
| 581 | |
| 582 | #define error(i) i |
| 583 | |
| 584 | #ifdef lint |
| 585 | char *std_errlist[] = { |
| 586 | #else |
| 587 | short std_errlist[] = { |
| 588 | #endif |
| 589 | error("Error 0"), |
| 590 | error("Not super-user"), |
| 591 | error("No such file or directory"), |
| 592 | error("No such process"), |
| 593 | error("Interrupted system call"), |
| 594 | error("Physical I/O error"), |
| 595 | error("No such device or address"), |
| 596 | error("Argument list too long"), |
| 597 | error("Exec format error"), |
| 598 | error("Bad file number"), |
| 599 | error("No children"), |
| 600 | error("No more processes"), |
| 601 | error("Not enough core"), |
| 602 | error("Permission denied"), |
| 603 | error("Bad address"), |
| 604 | error("Block device required"), |
| 605 | error("Mount device busy"), |
| 606 | error("File exists"), |
| 607 | error("Cross-device link"), |
| 608 | error("No such device"), |
| 609 | error("Not a directory"), |
| 610 | error("Is a directory"), |
| 611 | error("Invalid argument"), |
| 612 | error("File table overflow"), |
| 613 | error("Too many open files"), |
| 614 | error("Not a typewriter"), |
| 615 | error("Text file busy"), |
| 616 | error("File too large"), |
| 617 | error("No space left on device"), |
| 618 | error("Illegal seek"), |
| 619 | error("Read-only file system"), |
| 620 | error("Too many links"), |
| 621 | error("Broken pipe") |
| 622 | #ifndef QUOTA |
| 623 | , error("Math argument") |
| 624 | , error("Result too large") |
| 625 | #else |
| 626 | , error("Quota exceeded") |
| 627 | #endif |
| 628 | }; |
| 629 | |
| 630 | #undef error |
| 631 | |
| 632 | char * |
| 633 | strend(cp) |
| 634 | register char *cp; |
| 635 | { |
| 636 | |
| 637 | while (*cp) |
| 638 | cp++; |
| 639 | return (cp); |
| 640 | } |
| 641 | |
| 642 | strcLIN(dp) |
| 643 | char *dp; |
| 644 | { |
| 645 | |
| 646 | CP(linebuf, dp); |
| 647 | } |
| 648 | |
| 649 | syserror() |
| 650 | { |
| 651 | register int e = errno; |
| 652 | |
| 653 | dirtcnt = 0; |
| 654 | putchar(' '); |
| 655 | if (e >= 0 && errno <= std_nerrs) |
| 656 | error(std_errlist[e]); |
| 657 | else |
| 658 | error("System error %d", e); |
| 659 | } |
| 660 | |
| 661 | char * |
| 662 | vfindcol(i) |
| 663 | int i; |
| 664 | { |
| 665 | register char *cp; |
| 666 | register int (*OO)() = Outchar; |
| 667 | |
| 668 | Outchar = qcount; |
| 669 | ignore(qcolumn(linebuf - 1, NOSTR)); |
| 670 | for (cp = linebuf; *cp && vcntcol < i; cp++) |
| 671 | putchar(*cp); |
| 672 | if (cp != linebuf) |
| 673 | cp--; |
| 674 | Outchar = OO; |
| 675 | return (cp); |
| 676 | } |
| 677 | |
| 678 | char * |
| 679 | vskipwh(cp) |
| 680 | register char *cp; |
| 681 | { |
| 682 | |
| 683 | while (iswhite(*cp) && cp[1]) |
| 684 | cp++; |
| 685 | return (cp); |
| 686 | } |
| 687 | |
| 688 | |
| 689 | char * |
| 690 | vpastwh(cp) |
| 691 | register char *cp; |
| 692 | { |
| 693 | |
| 694 | while (iswhite(*cp)) |
| 695 | cp++; |
| 696 | return (cp); |
| 697 | } |
| 698 | |
| 699 | whitecnt(cp) |
| 700 | register char *cp; |
| 701 | { |
| 702 | register int i; |
| 703 | |
| 704 | i = 0; |
| 705 | for (;;) |
| 706 | switch (*cp++) { |
| 707 | |
| 708 | case '\t': |
| 709 | i += value(TABSTOP) - i % value(TABSTOP); |
| 710 | break; |
| 711 | |
| 712 | case ' ': |
| 713 | i++; |
| 714 | break; |
| 715 | |
| 716 | default: |
| 717 | return (i); |
| 718 | } |
| 719 | } |
| 720 | |
| 721 | #ifdef lint |
| 722 | Ignore(a) |
| 723 | char *a; |
| 724 | { |
| 725 | |
| 726 | a = a; |
| 727 | } |
| 728 | |
| 729 | Ignorf(a) |
| 730 | int (*a)(); |
| 731 | { |
| 732 | |
| 733 | a = a; |
| 734 | } |
| 735 | #endif |
| 736 | |
| 737 | markit(addr) |
| 738 | line *addr; |
| 739 | { |
| 740 | |
| 741 | if (addr != dot && addr >= one && addr <= dol) |
| 742 | markDOT(); |
| 743 | } |
| 744 | |