| 1 | #include <whoami.h> |
| 2 | #include <stdio.h> |
| 3 | #include <signal.h> |
| 4 | #include <sgtty.h> |
| 5 | #include <setjmp.h> |
| 6 | #include <sys/types.h> |
| 7 | #include <sys/dir.h> |
| 8 | #include <sys/stat.h> |
| 9 | |
| 10 | #ifdef CORY |
| 11 | #define MBIT RAW |
| 12 | #else |
| 13 | #include <ctype.h> |
| 14 | #define MBIT CBREAK |
| 15 | #endif |
| 16 | |
| 17 | #define TBUFSIZ 1024 |
| 18 | #define LINSIZ 256 |
| 19 | #define ctrl(letter) ('letter' & 077) |
| 20 | #define RUBOUT '\177' |
| 21 | #define ESC '\033' |
| 22 | #define QUIT '\034' |
| 23 | |
| 24 | struct sgttyb otty; |
| 25 | int fnum, no_intty, no_tty, slow_tty; |
| 26 | int dum_opt, dlines, onquit(), end_it(); |
| 27 | int stop_opt = 1; |
| 28 | int promptlen; |
| 29 | int startup = 1; |
| 30 | int firstf = 1; |
| 31 | int notell = 1; |
| 32 | int inwait, pause, errors; |
| 33 | int within; /* true if we are within a file, |
| 34 | false if we are between files */ |
| 35 | int hard, dumb, noscroll, hardtabs; |
| 36 | char **fnames; |
| 37 | int nfiles; |
| 38 | char *shell; |
| 39 | char ch; |
| 40 | jmp_buf restore; |
| 41 | char obuf[BUFSIZ]; /* stdout buffer */ |
| 42 | char Line[LINSIZ]; |
| 43 | int Lpp = 24; /* lines per page */ |
| 44 | char *Clear; /* clear screen */ |
| 45 | char *eraseln; /* erase line */ |
| 46 | char *Senter, *Sexit;/* enter and exit standout mode */ |
| 47 | char *tgetstr(); |
| 48 | int Mcol = 80; /* number of columns */ |
| 49 | int Wrap = 1; /* set if automargins */ |
| 50 | extern char PC; /* pad character */ |
| 51 | extern short ospeed; |
| 52 | |
| 53 | |
| 54 | main(argc, argv) |
| 55 | int argc; |
| 56 | char *argv[]; |
| 57 | { |
| 58 | register FILE *f; |
| 59 | register char *s; |
| 60 | register char *p; |
| 61 | register char ch; |
| 62 | register int left; |
| 63 | int prnames = 0; |
| 64 | int initopt = 0; |
| 65 | int srchopt = 0; |
| 66 | int initline; |
| 67 | char buf[TBUFSIZ]; |
| 68 | char clearbuf[100]; |
| 69 | char initbuf[80]; |
| 70 | char *clearptr; |
| 71 | char *getenv(); |
| 72 | FILE *checkf(); |
| 73 | |
| 74 | nfiles = argc; |
| 75 | fnames = argv; |
| 76 | /* Put terminal setup stuff in separate procedure ?? (From here...) */ |
| 77 | setbuf(stdout, obuf); |
| 78 | if (!(no_tty = gtty(1, &otty))) { |
| 79 | if (tgetent(buf, getenv("TERM")) <= 0) { |
| 80 | dumb++; |
| 81 | } |
| 82 | else { |
| 83 | if (((Lpp = tgetnum("li")) < 0) || tgetflag("hc")) { |
| 84 | hard++; /* Hard copy terminal */ |
| 85 | Lpp = 24; |
| 86 | } |
| 87 | if (!hard && tgetflag("ns")) |
| 88 | noscroll++; |
| 89 | if ((Mcol = tgetnum("co")) < 0) |
| 90 | Mcol = 80; |
| 91 | Wrap = tgetflag("am"); |
| 92 | clearptr = clearbuf; |
| 93 | eraseln = tgetstr("ce",&clearptr); |
| 94 | Clear = tgetstr("cl", &clearptr); |
| 95 | Senter = tgetstr("so", &clearptr); |
| 96 | Sexit = tgetstr("se", &clearptr); |
| 97 | PC = *tgetstr("pc", &clearptr); |
| 98 | } |
| 99 | if ((shell = getenv("SHELL")) == NULL) |
| 100 | shell = "/bin/sh"; |
| 101 | } |
| 102 | no_intty = gtty(0, &otty); |
| 103 | gtty(2, &otty); |
| 104 | ospeed = otty.sg_ospeed; |
| 105 | slow_tty = ospeed < B1200; |
| 106 | hardtabs = !(otty.sg_flags & XTABS); |
| 107 | if (!no_tty) { |
| 108 | otty.sg_flags &= ~ECHO; |
| 109 | if (MBIT == CBREAK || !slow_tty) |
| 110 | otty.sg_flags |= MBIT; |
| 111 | } |
| 112 | /* ... until here or so */ |
| 113 | while (--nfiles > 0) { |
| 114 | if ((ch = (*++fnames)[0]) == '-') { |
| 115 | for (s = fnames[0] + 1, dlines = 0; *s != '\0'; s++) |
| 116 | if (isdigit(*s)) |
| 117 | dlines = dlines*10 + *s - '0'; |
| 118 | else if (*s == 'd') |
| 119 | dum_opt = 1; |
| 120 | else if (*s == 'l') |
| 121 | stop_opt = 0; |
| 122 | } |
| 123 | else if (ch == '+') { |
| 124 | s = *fnames; |
| 125 | if (*++s == '/') { |
| 126 | srchopt++; |
| 127 | for (++s, p = initbuf; p < initbuf + 79 && *s != '\0';) |
| 128 | *p++ = *s++; |
| 129 | *p = '\0'; |
| 130 | } |
| 131 | else { |
| 132 | initopt++; |
| 133 | for (initline = 0; *s != '\0'; s++) |
| 134 | if (isdigit (*s)) |
| 135 | initline = initline*10 + *s -'0'; |
| 136 | --initline; |
| 137 | } |
| 138 | } |
| 139 | else break; |
| 140 | } |
| 141 | if (dlines == 0) |
| 142 | dlines = Lpp - 2; |
| 143 | left = dlines; |
| 144 | if (nfiles > 1) |
| 145 | prnames++; |
| 146 | if (!no_intty && nfiles == 0) { |
| 147 | fputs("Usage: ",stderr); |
| 148 | fputs(argv[0],stderr); |
| 149 | fputs(" [-dn] name1 name2 ...\n",stderr); |
| 150 | exit(1); |
| 151 | } |
| 152 | else |
| 153 | f = stdin; |
| 154 | if (!no_tty) { |
| 155 | signal(SIGQUIT, onquit); |
| 156 | signal(SIGINT, end_it); |
| 157 | stty (2, &otty); |
| 158 | } |
| 159 | if (no_intty) { |
| 160 | if (no_tty) |
| 161 | copy_file (stdin); |
| 162 | else { |
| 163 | if (srchopt) |
| 164 | search (initbuf, stdin, 1); |
| 165 | else if (initopt) |
| 166 | skiplns (initline, stdin); |
| 167 | screen (stdin, left); |
| 168 | } |
| 169 | end_it (); |
| 170 | } |
| 171 | |
| 172 | while (fnum < nfiles) { |
| 173 | if ((f = checkf (fnames[fnum])) != NULL) { |
| 174 | if (firstf) setjmp (restore); |
| 175 | if (firstf) { |
| 176 | firstf = 0; |
| 177 | if (srchopt) |
| 178 | search (initbuf, f, 1); |
| 179 | else if (initopt) |
| 180 | skiplns (initline, f); |
| 181 | } |
| 182 | else if (fnum < nfiles && !no_tty) { |
| 183 | setjmp (restore); |
| 184 | left = command (fnames[fnum], f); |
| 185 | } |
| 186 | if (left != 0) { |
| 187 | if (prnames) { |
| 188 | pr("::::::::::::::"); |
| 189 | if (promptlen > 14) |
| 190 | erase (14); |
| 191 | putchar ('\n'); |
| 192 | pr(fnames[fnum]); |
| 193 | pr("\n::::::::::::::\n"); |
| 194 | if (left > Lpp - 4) |
| 195 | left = Lpp - 4; |
| 196 | } |
| 197 | if (no_tty) |
| 198 | copy_file (f); |
| 199 | else { |
| 200 | within++; |
| 201 | screen(f, left); |
| 202 | within = 0; |
| 203 | } |
| 204 | } |
| 205 | setjmp (restore); |
| 206 | fflush(stdout); |
| 207 | fclose(f); |
| 208 | } |
| 209 | fnum++; |
| 210 | firstf = 0; |
| 211 | } |
| 212 | otty.sg_flags |= ECHO; |
| 213 | otty.sg_flags &= ~MBIT; |
| 214 | stty(2, &otty); |
| 215 | exit(0); |
| 216 | } |
| 217 | |
| 218 | /* |
| 219 | ** Check whether the file named by fs is an ASCII file which the user may |
| 220 | ** access. If it is, return the opened file. Otherwise return NULL. |
| 221 | */ |
| 222 | |
| 223 | FILE * |
| 224 | checkf (fs) |
| 225 | register char *fs; |
| 226 | { |
| 227 | #ifdef CORY |
| 228 | int space[3]; /* Why doesn't libretro have a V7 stat? */ |
| 229 | #endif |
| 230 | struct stat stbuf; |
| 231 | register FILE *f; |
| 232 | char c; |
| 233 | |
| 234 | if (stat (fs, &stbuf) == -1) { |
| 235 | fflush(stdout); |
| 236 | perror(fs); |
| 237 | return (NULL); |
| 238 | } |
| 239 | if (stbuf.st_mode & S_IFDIR) { |
| 240 | pr("\n*** "); |
| 241 | pr(fs); |
| 242 | pr(": directory ***\n\n"); |
| 243 | return (NULL); |
| 244 | } |
| 245 | if ((f=fopen(fs, "r")) == NULL) { |
| 246 | fflush(stdout); |
| 247 | perror(fs); |
| 248 | return (NULL); |
| 249 | } |
| 250 | c = getc(f); |
| 251 | |
| 252 | /* Try to see whether it is an ASCII file */ |
| 253 | |
| 254 | switch ((c | *f->_ptr << 8) & 0177777) { |
| 255 | case 0405: |
| 256 | case 0407: |
| 257 | case 0410: |
| 258 | case 0411: |
| 259 | case 0177545: |
| 260 | pr("\n******** "); |
| 261 | pr(fs); |
| 262 | pr(": Not a text file ********\n\n"); |
| 263 | fclose (f); |
| 264 | return (NULL); |
| 265 | default: |
| 266 | break; |
| 267 | } |
| 268 | if (c == '\f') { |
| 269 | c = 0; |
| 270 | doclear (); |
| 271 | } |
| 272 | ungetc (c, f); |
| 273 | return (f); |
| 274 | } |
| 275 | |
| 276 | /* |
| 277 | ** A real function, for the tputs routine in termlib |
| 278 | */ |
| 279 | |
| 280 | putch (ch) |
| 281 | register char ch; |
| 282 | { |
| 283 | putchar (ch); |
| 284 | } |
| 285 | |
| 286 | /* |
| 287 | ** Print out the contents of the file f, one screenful at a time. |
| 288 | */ |
| 289 | |
| 290 | #define STOP -10 |
| 291 | |
| 292 | screen (f, num_lines) |
| 293 | register FILE *f; |
| 294 | register int num_lines; |
| 295 | { |
| 296 | register int c; |
| 297 | int nchars; |
| 298 | |
| 299 | for (;;) { |
| 300 | while (num_lines > 0 && !pause) { |
| 301 | if ((nchars = getline (f)) == EOF) |
| 302 | return; |
| 303 | if (Senter && *Senter == ' ' && promptlen > 0) |
| 304 | erase (0); |
| 305 | pr (Line); |
| 306 | if (nchars < promptlen) |
| 307 | erase (nchars); /* erase () sets promptlen to 0 */ |
| 308 | else promptlen = 0; |
| 309 | if (nchars < Mcol) |
| 310 | putchar('\n'); |
| 311 | if (nchars == STOP) |
| 312 | break; |
| 313 | num_lines--; |
| 314 | } |
| 315 | fflush(stdout); |
| 316 | if ((c = getc(f)) == EOF) { |
| 317 | if (noscroll) |
| 318 | doclear(); |
| 319 | else |
| 320 | erase (0); |
| 321 | return; |
| 322 | } |
| 323 | ungetc (c, f); |
| 324 | setjmp (restore); |
| 325 | pause = 0; startup = 0; |
| 326 | if ((num_lines = command (NULL, f)) == 0) |
| 327 | return; |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | /* |
| 332 | ** Come here if a quit signal is received |
| 333 | */ |
| 334 | |
| 335 | onquit() |
| 336 | { |
| 337 | signal(SIGQUIT, SIG_IGN); |
| 338 | if (!inwait) { |
| 339 | putchar ('\n'); |
| 340 | if (!startup) { |
| 341 | signal(SIGQUIT, onquit); |
| 342 | longjmp (restore, 1); |
| 343 | } |
| 344 | else |
| 345 | pause++; |
| 346 | } |
| 347 | else if (!dum_opt && notell) { |
| 348 | write (2, "[Use q or Q to quit]", 20); |
| 349 | promptlen += 20; |
| 350 | notell = 0; |
| 351 | } |
| 352 | signal(SIGQUIT, onquit); |
| 353 | } |
| 354 | |
| 355 | /* |
| 356 | ** Clean up terminal state and exit. Also come here if interrupt signal received |
| 357 | */ |
| 358 | |
| 359 | end_it () |
| 360 | { |
| 361 | |
| 362 | otty.sg_flags &= ~MBIT; |
| 363 | otty.sg_flags |= ECHO; |
| 364 | stty(2, &otty); |
| 365 | if (promptlen > 0) |
| 366 | kill_line (); |
| 367 | else |
| 368 | putchar ('\n'); |
| 369 | exit(0); |
| 370 | } |
| 371 | |
| 372 | copy_file(f) |
| 373 | register FILE *f; |
| 374 | { |
| 375 | register int c; |
| 376 | |
| 377 | while ((c = getc(f)) != EOF) |
| 378 | putchar(c); |
| 379 | } |
| 380 | |
| 381 | |
| 382 | printd (n) |
| 383 | register int n; |
| 384 | { |
| 385 | register int a; |
| 386 | |
| 387 | if (a = n/10) |
| 388 | printd(a); |
| 389 | putchar(n % 10 + '0'); |
| 390 | } |
| 391 | |
| 392 | static char bell = ctrl(G); |
| 393 | |
| 394 | strlen (s) |
| 395 | char *s; |
| 396 | { |
| 397 | register char *p; |
| 398 | |
| 399 | p = s; |
| 400 | while (*p++) |
| 401 | ; |
| 402 | return (p - s - 1); |
| 403 | } |
| 404 | |
| 405 | prompt (filename) |
| 406 | char *filename; |
| 407 | { |
| 408 | if (promptlen > 0) |
| 409 | kill_line (); |
| 410 | if (!hard) { |
| 411 | promptlen = 8; |
| 412 | if (Senter && Sexit) |
| 413 | tputs (Senter, 1, putch); |
| 414 | pr("--More--"); |
| 415 | if (filename != NULL) { |
| 416 | pr("(Next file: "); |
| 417 | pr(filename); |
| 418 | putchar(')'); |
| 419 | promptlen += 13 + strlen(filename); |
| 420 | } |
| 421 | if (dum_opt) { |
| 422 | pr("[Hit space to continue, Rubout to abort]"); |
| 423 | promptlen += 40; |
| 424 | } |
| 425 | if (Senter && Sexit) |
| 426 | tputs (Sexit, 1, putch); |
| 427 | fflush(stdout); |
| 428 | } |
| 429 | else |
| 430 | write (2, &bell, 1); |
| 431 | inwait++; |
| 432 | } |
| 433 | |
| 434 | /* |
| 435 | ** Get a logical line |
| 436 | */ |
| 437 | |
| 438 | getline(f) |
| 439 | register FILE *f; |
| 440 | { |
| 441 | register char c; |
| 442 | register char *p; |
| 443 | register int column; |
| 444 | register int i; |
| 445 | static int colflg; |
| 446 | |
| 447 | p = Line; |
| 448 | i = column = 0; |
| 449 | c = getc (f); |
| 450 | if (colflg && c == '\n') c = getc (f); |
| 451 | for (i = 1; i < LINSIZ; i++) { |
| 452 | if (c == EOF) { |
| 453 | if (p > Line) { |
| 454 | *p = '\0'; |
| 455 | return (column); |
| 456 | } |
| 457 | return (EOF); |
| 458 | } |
| 459 | if (c == '\n') |
| 460 | break; |
| 461 | *p++ = c; |
| 462 | if (c == '\t') |
| 463 | if (hardtabs && column < promptlen && !hard) { |
| 464 | if (eraseln && !dumb) { |
| 465 | tputs (eraseln, 1, putch); |
| 466 | promptlen = 0; |
| 467 | } |
| 468 | else { |
| 469 | for (--p; column & 7; column++) |
| 470 | *p++ = ' '; |
| 471 | if (column >= promptlen) promptlen = 0; |
| 472 | } |
| 473 | } |
| 474 | else |
| 475 | column = 1 + (column | 7); |
| 476 | else if (c == '\b') |
| 477 | column--; |
| 478 | else if (c == '\r') |
| 479 | column = 0; |
| 480 | else if (c == '\f' && stop_opt) { |
| 481 | p[-1] = '^'; |
| 482 | *p++ = 'L'; |
| 483 | break; |
| 484 | } |
| 485 | else if (c == EOF) |
| 486 | return (column); |
| 487 | else if (c >= ' ') |
| 488 | column++; |
| 489 | if (column >= Mcol) break; |
| 490 | c = getc (f); |
| 491 | } |
| 492 | if (Mcol > 0 && column >= Mcol) { |
| 493 | if (!Wrap) { |
| 494 | *p++ = '\n'; |
| 495 | i++; |
| 496 | } |
| 497 | } |
| 498 | colflg = (column == Mcol) || c == '\f'; |
| 499 | *p = 0; |
| 500 | if (c == '\f' && stop_opt) |
| 501 | return (STOP); |
| 502 | return (column); |
| 503 | } |
| 504 | |
| 505 | /* |
| 506 | ** Erase the rest of the prompt, assuming we are starting column col. |
| 507 | */ |
| 508 | |
| 509 | erase (col) |
| 510 | register int col; |
| 511 | { |
| 512 | |
| 513 | if (hard || promptlen == 0) |
| 514 | return; |
| 515 | if (col == 0) |
| 516 | putchar ('\r'); |
| 517 | if (!dumb && eraseln) |
| 518 | tputs (eraseln, 1, putch); |
| 519 | else |
| 520 | for (col = promptlen - col; col > 0; col--) |
| 521 | putchar (' '); |
| 522 | promptlen = 0; |
| 523 | } |
| 524 | |
| 525 | /* |
| 526 | ** Erase the current line entirely |
| 527 | */ |
| 528 | |
| 529 | kill_line () |
| 530 | { |
| 531 | erase (0); |
| 532 | if (!eraseln || dumb) putchar ('\r'); |
| 533 | } |
| 534 | |
| 535 | /* |
| 536 | ** Print string |
| 537 | */ |
| 538 | |
| 539 | pr(s1) |
| 540 | char *s1; |
| 541 | { |
| 542 | register char *s; |
| 543 | register char c; |
| 544 | |
| 545 | for (s = s1; c = *s++; ) |
| 546 | putchar(c); |
| 547 | } |
| 548 | |
| 549 | /* |
| 550 | ** Clear the screen |
| 551 | */ |
| 552 | |
| 553 | doclear() |
| 554 | { |
| 555 | if (Clear && Lpp > 0) |
| 556 | tputs(Clear, 1, putch); |
| 557 | } |
| 558 | |
| 559 | |
| 560 | /* |
| 561 | ** Read a command and do it. A command consists of an optional integer |
| 562 | ** argument followed by the command character. Return the number of lines |
| 563 | ** to display in the next screenful. If there is nothing more to display |
| 564 | ** in the current file, zero is returned. |
| 565 | */ |
| 566 | |
| 567 | command (filename, f) |
| 568 | char *filename; |
| 569 | register FILE *f; |
| 570 | { |
| 571 | register int nlines; |
| 572 | register int retval; |
| 573 | register char c; |
| 574 | int id, done; |
| 575 | char comchar, cmdbuf[80], *p; |
| 576 | |
| 577 | #define ret(val) retval=val;done++;break |
| 578 | |
| 579 | done = 0; |
| 580 | if (!errors) |
| 581 | prompt (filename); |
| 582 | else |
| 583 | errors = 0; |
| 584 | if (MBIT == RAW && slow_tty) { |
| 585 | otty.sg_flags |= MBIT; |
| 586 | stty(2, &otty); |
| 587 | } |
| 588 | for (;;) { |
| 589 | nlines = number (&comchar); |
| 590 | switch (comchar) { |
| 591 | case ' ': |
| 592 | case 'z': |
| 593 | if (nlines == 0) nlines = dlines; |
| 594 | else if (comchar == 'z') dlines = nlines; |
| 595 | ret (nlines); |
| 596 | case 'd': |
| 597 | case ctrl(D): |
| 598 | ret (11); |
| 599 | case RUBOUT: |
| 600 | case 'q': |
| 601 | case 'Q': |
| 602 | end_it (); |
| 603 | case 's': |
| 604 | case 'f': |
| 605 | if (nlines == 0) nlines++; |
| 606 | if (comchar == 'f') |
| 607 | nlines *= dlines; |
| 608 | putchar ('\r'); |
| 609 | erase (0); |
| 610 | pr("\n...skipping "); |
| 611 | printd(nlines); |
| 612 | pr(" line"); |
| 613 | if (nlines > 1) |
| 614 | pr("s\n\n"); |
| 615 | else |
| 616 | pr("\n\n"); |
| 617 | while (nlines > 0) { |
| 618 | while ((c = getc (f)) != '\n') |
| 619 | if (c == EOF) { |
| 620 | retval = 0; |
| 621 | done++; |
| 622 | goto endsw; |
| 623 | } |
| 624 | nlines--; |
| 625 | } |
| 626 | ret (dlines); |
| 627 | break; |
| 628 | case '\n': |
| 629 | ret (1); |
| 630 | case 'n': |
| 631 | if (nlines == 0) |
| 632 | nlines++; |
| 633 | putchar ('\r'); |
| 634 | erase (0); |
| 635 | skipf (nlines); |
| 636 | ret (0); |
| 637 | case 'p': |
| 638 | if (no_intty) { |
| 639 | write (2, &bell, 1); |
| 640 | break; |
| 641 | } |
| 642 | putchar ('\r'); |
| 643 | erase (0); |
| 644 | if (nlines == 0) |
| 645 | nlines++; |
| 646 | skipf (-nlines); |
| 647 | ret (0); |
| 648 | case '/': |
| 649 | kill_line (); |
| 650 | pr ("/"); |
| 651 | promptlen = 1; |
| 652 | fflush (stdout); |
| 653 | ttyin (cmdbuf, 78, '/'); |
| 654 | if (nlines == 0) nlines++; |
| 655 | write (2, "\r", 1); |
| 656 | search (cmdbuf, f, nlines); |
| 657 | ret (dlines); |
| 658 | case '!': |
| 659 | kill_line (); |
| 660 | pr ("!"); |
| 661 | promptlen = 1; |
| 662 | fflush (stdout); |
| 663 | ttyin (cmdbuf, 78, '!'); |
| 664 | write (2, "\n", 1); |
| 665 | promptlen = 0; |
| 666 | otty.sg_flags |= ECHO; |
| 667 | otty.sg_flags &= ~MBIT; |
| 668 | stty(2, &otty); |
| 669 | while ((id = fork ()) < 0) |
| 670 | ; |
| 671 | if (id == 0) { |
| 672 | execl (shell, shell, "-c", cmdbuf, 0); |
| 673 | write (2, "exec failed\n", 12); |
| 674 | exit (1); |
| 675 | } |
| 676 | signal (SIGINT, SIG_IGN); |
| 677 | signal (SIGQUIT, SIG_IGN); |
| 678 | wait (0); |
| 679 | signal (SIGINT, end_it); |
| 680 | signal (SIGQUIT, onquit); |
| 681 | otty.sg_flags |= MBIT; |
| 682 | otty.sg_flags &= ~ECHO; |
| 683 | stty(2, &otty); |
| 684 | pr ("----------\n(continue)\n"); |
| 685 | fflush (stdout); |
| 686 | break; |
| 687 | default: |
| 688 | write (2, &bell, 1); |
| 689 | break; |
| 690 | } |
| 691 | if (done) break; |
| 692 | } |
| 693 | putchar ('\r'); |
| 694 | endsw: |
| 695 | inwait = 0; |
| 696 | notell++; |
| 697 | if (MBIT == RAW && slow_tty) { |
| 698 | otty.sg_flags &= ~MBIT; |
| 699 | stty(2, &otty); |
| 700 | } |
| 701 | return (retval); |
| 702 | } |
| 703 | |
| 704 | char ch; |
| 705 | |
| 706 | /* |
| 707 | ** Read a decimal number from the terminal. Set cmd to the non-digit which |
| 708 | ** terminates the number. |
| 709 | */ |
| 710 | |
| 711 | number(cmd) |
| 712 | char *cmd; |
| 713 | { |
| 714 | register int i; |
| 715 | |
| 716 | i = 0; ch = otty.sg_kill; |
| 717 | for (;;) { |
| 718 | read (2, &ch, 1); |
| 719 | if (ch >= '0' && ch <= '9') |
| 720 | i = i*10 + ch - '0'; |
| 721 | else if (ch == otty.sg_kill) |
| 722 | i = 0; |
| 723 | else { |
| 724 | *cmd = ch; |
| 725 | break; |
| 726 | } |
| 727 | } |
| 728 | return (i); |
| 729 | } |
| 730 | |
| 731 | /* |
| 732 | ** Skip n lines in the file f |
| 733 | */ |
| 734 | |
| 735 | skiplns (n, f) |
| 736 | register int n; |
| 737 | register FILE *f; |
| 738 | { |
| 739 | register char c; |
| 740 | |
| 741 | while (n > 0) { |
| 742 | while ((c = getc (f)) != '\n') |
| 743 | if (c == EOF) |
| 744 | return; |
| 745 | n--; |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | /* |
| 750 | ** Skip nskip files in the file list (from the command line). Nskip may be |
| 751 | ** negative. |
| 752 | */ |
| 753 | |
| 754 | skipf (nskip) |
| 755 | register int nskip; |
| 756 | { |
| 757 | if (nskip == 0) return; |
| 758 | if (nskip > 0) { |
| 759 | if (fnum > nfiles - 1) |
| 760 | end_it (); |
| 761 | } |
| 762 | else if (within) |
| 763 | ++fnum; |
| 764 | fnum += nskip; |
| 765 | if (fnum < 0) |
| 766 | fnum = 0; |
| 767 | else if (fnum > nfiles - 1) |
| 768 | fnum = nfiles -1; |
| 769 | pr ("\n...Skipping "); |
| 770 | pr (nskip > 0 ? "to file " : "back to file "); |
| 771 | pr (fnames[fnum]); |
| 772 | pr ("\n\n"); |
| 773 | --fnum; |
| 774 | } |
| 775 | |
| 776 | readch () |
| 777 | { |
| 778 | char ch; |
| 779 | |
| 780 | read (2, &ch, 1); |
| 781 | return (ch); |
| 782 | } |
| 783 | |
| 784 | static char BS = '\b'; |
| 785 | static char CARAT = '^'; |
| 786 | |
| 787 | ttyin (buf, nmax, pchar) |
| 788 | char buf[]; |
| 789 | register int nmax; |
| 790 | char pchar; |
| 791 | { |
| 792 | register char *sptr; |
| 793 | register char ch; |
| 794 | register int slash = 0; |
| 795 | int maxlen; |
| 796 | char cbuf; |
| 797 | |
| 798 | sptr = buf; |
| 799 | maxlen = 0; |
| 800 | while (sptr - buf < nmax) { |
| 801 | if (promptlen > maxlen) maxlen = promptlen; |
| 802 | ch = readch (); |
| 803 | if (ch == '\\') { |
| 804 | slash++; |
| 805 | } |
| 806 | else if (ch == otty.sg_erase && !slash) { |
| 807 | if (sptr > buf) { |
| 808 | --promptlen; |
| 809 | write (2, &BS, 1); |
| 810 | --sptr; |
| 811 | if (*sptr < ' ' && *sptr != '\n') { |
| 812 | --promptlen; |
| 813 | write (2, &BS, 1); |
| 814 | } |
| 815 | continue; |
| 816 | } |
| 817 | else { |
| 818 | if (!eraseln) promptlen = maxlen; |
| 819 | longjmp (restore, 1); |
| 820 | } |
| 821 | } |
| 822 | else if (ch == otty.sg_kill && !slash) { |
| 823 | if (hard) |
| 824 | pr (" XXX\n"); |
| 825 | else { |
| 826 | putchar ('\r'); |
| 827 | putchar (pchar); |
| 828 | if (eraseln) |
| 829 | erase (1); |
| 830 | promptlen = 1; |
| 831 | sptr = buf; |
| 832 | } |
| 833 | fflush (stdout); |
| 834 | continue; |
| 835 | } |
| 836 | if (slash && (ch == otty.sg_kill || ch == otty.sg_erase)) { |
| 837 | write (2, &BS, 1); |
| 838 | --sptr; |
| 839 | } |
| 840 | if (ch != '\\') |
| 841 | slash = 0; |
| 842 | *sptr++ = ch; |
| 843 | if (ch < ' ' && ch != '\n' && ch != ESC) { |
| 844 | ch += 0100; |
| 845 | write (2, &CARAT, 1); |
| 846 | promptlen++; |
| 847 | } |
| 848 | cbuf = ch; |
| 849 | if (ch != '\n' && ch != ESC) { |
| 850 | write (2, &cbuf, 1); |
| 851 | promptlen++; |
| 852 | } |
| 853 | else break; |
| 854 | } |
| 855 | *--sptr = '\0'; |
| 856 | if (!eraseln) promptlen = maxlen; |
| 857 | if (sptr - buf >= nmax - 1) |
| 858 | error ("Line too long"); |
| 859 | } |
| 860 | |
| 861 | /* |
| 862 | ** Search for nth ocurrence of regular expression contained in buf in the file |
| 863 | */ |
| 864 | |
| 865 | search (buf, file, n) |
| 866 | char buf[]; |
| 867 | FILE *file; |
| 868 | register int n; |
| 869 | { |
| 870 | long startline = ftell (file); |
| 871 | register long line1 = startline; |
| 872 | register long line2 = startline; |
| 873 | register long line3 = startline; |
| 874 | register int lncount; |
| 875 | |
| 876 | lncount = 0; |
| 877 | compile (buf); |
| 878 | while (!feof (file)) { |
| 879 | line3 = line2; |
| 880 | line2 = line1; |
| 881 | line1 = ftell (file); |
| 882 | rdline (file); |
| 883 | lncount++; |
| 884 | if (execute (Line)) |
| 885 | if (--n == 0) { |
| 886 | if (lncount > 3 || (lncount > 1 && no_intty)) |
| 887 | pr ("\n...skipping\n"); |
| 888 | if (!no_intty) |
| 889 | fseek (file, line3, 0); |
| 890 | else { |
| 891 | kill_line (); |
| 892 | pr (Line); |
| 893 | putchar ('\n'); |
| 894 | } |
| 895 | break; |
| 896 | } |
| 897 | } |
| 898 | if (feof (file)) { |
| 899 | if (!no_intty) { |
| 900 | #ifdef CORY |
| 901 | file->_flag &= ~_IOEOF; /* why doesn't fseek do this ??!!??! */ |
| 902 | #endif |
| 903 | fseek (file, startline, 0); |
| 904 | } |
| 905 | else { |
| 906 | pr ("\nPattern not found\n"); |
| 907 | end_it (); |
| 908 | } |
| 909 | error ("Pattern not found"); |
| 910 | } |
| 911 | } |
| 912 | |
| 913 | /* |
| 914 | * The following are adapted from the editor |
| 915 | */ |
| 916 | |
| 917 | /* |
| 918 | * Internal form of regular expressions. |
| 919 | */ |
| 920 | #define CBRA 1 /* left \( bracket */ |
| 921 | #define CCHR 2 /* a particular character */ |
| 922 | #define CDOT 4 /* any char (.) */ |
| 923 | #define CCL 6 /* begin class ([) */ |
| 924 | #define NCCL 8 /* begin not class ([^) */ |
| 925 | #define CDOL 10 /* end of line ($) */ |
| 926 | #define CEOF 11 /* end of pattern */ |
| 927 | #define CKET 12 /* right \) bracket */ |
| 928 | #define CBACK 14 /* repeat previous match (\1, etc on lhs) */ |
| 929 | |
| 930 | #define STAR 01 /* or'ed with some symbols to indicate * suffix */ |
| 931 | |
| 932 | #define NBRA 5 /* max # of \( \) pairs */ |
| 933 | |
| 934 | char expbuf[BUFSIZ]; |
| 935 | char *braslist[NBRA]; |
| 936 | char *braelist[NBRA]; |
| 937 | int nbra; |
| 938 | int circfl; |
| 939 | char *loc1; |
| 940 | char *loc2; |
| 941 | char *locs; |
| 942 | |
| 943 | |
| 944 | /* |
| 945 | * compile: convert typed in regular expression into internal form. |
| 946 | * eof is the char that delimits the r.e. |
| 947 | * General structure of compiled r.e. in expbuf: A sequence of codes |
| 948 | * from #defines above (CCHR, CDOT, etc). Some of these take arguments |
| 949 | * which follow in line (e.g. CCHR is followed by the particular character |
| 950 | * it is required to match.) CEOF terminates the r.e. |
| 951 | */ |
| 952 | compile(inbuf) |
| 953 | char inbuf[]; |
| 954 | { |
| 955 | register char c; |
| 956 | register char *ep; |
| 957 | register char *bp = inbuf; |
| 958 | char *lastep; |
| 959 | char bracket[NBRA], *bracketp; |
| 960 | int cclcnt; |
| 961 | |
| 962 | /* comerr: compilation error. Don't leave half baked r.e. around. */ |
| 963 | #define comerr(msg) {expbuf[0] = 0; nbra = 0; error(msg); } |
| 964 | ep = expbuf; |
| 965 | bracketp = bracket; |
| 966 | if ((c = *bp++) == '\0') { |
| 967 | /* null r.e.: just re-use last r.e., which is still there */ |
| 968 | if (*ep==0) |
| 969 | error("No previous regular expression"); |
| 970 | return; |
| 971 | } |
| 972 | nbra = 0; |
| 973 | /* circfl: true if have ^ (anchored search). */ |
| 974 | circfl = 0; |
| 975 | if (c == '^') { |
| 976 | c = *bp++; |
| 977 | circfl++; |
| 978 | } |
| 979 | lastep = 0; |
| 980 | --bp; |
| 981 | for (;;) { /* for each character in the r.e. */ |
| 982 | if (ep >= &expbuf[BUFSIZ]) |
| 983 | comerr("r.e. too long"); |
| 984 | c = *bp++; |
| 985 | if (c == '\0') { |
| 986 | /* Hit trailing delim: clean up and quit */ |
| 987 | if (bracketp != bracket) |
| 988 | comerr("unmatched \\("); |
| 989 | *ep++ = CEOF; |
| 990 | *ep++ = 0; |
| 991 | return; |
| 992 | } |
| 993 | if (c!='*') |
| 994 | lastep = ep; |
| 995 | switch (c) { |
| 996 | |
| 997 | case '\\': |
| 998 | if ((c = *bp++)=='(') { |
| 999 | /* \(: start of subexpression */ |
| 1000 | if (nbra >= NBRA) |
| 1001 | comerr("too many \\(\\) pairs"); |
| 1002 | *bracketp++ = nbra; |
| 1003 | *ep++ = CBRA; |
| 1004 | *ep++ = nbra++; |
| 1005 | continue; |
| 1006 | } |
| 1007 | if (c == ')') { |
| 1008 | /* \): end of sub exp */ |
| 1009 | if (bracketp <= bracket) |
| 1010 | comerr("unmatched \\)"); |
| 1011 | *ep++ = CKET; |
| 1012 | *ep++ = *--bracketp; |
| 1013 | continue; |
| 1014 | } |
| 1015 | if (c>='1' && c<'1'+NBRA) { |
| 1016 | /* \1, \2, ...: rematch previous subexp */ |
| 1017 | *ep++ = CBACK; |
| 1018 | *ep++ = c-'1'; |
| 1019 | continue; |
| 1020 | } |
| 1021 | /* Otherwise just force that char, not specially */ |
| 1022 | *ep++ = CCHR; |
| 1023 | if (c=='\n') |
| 1024 | /* Newlines can't possibly be in lines */ |
| 1025 | comerr("multi line r.e. not allowed"); |
| 1026 | *ep++ = c; |
| 1027 | continue; |
| 1028 | |
| 1029 | case '.': |
| 1030 | /* .: match any character */ |
| 1031 | *ep++ = CDOT; |
| 1032 | continue; |
| 1033 | |
| 1034 | case '*': |
| 1035 | /* *: Repeat last char indefinitely */ |
| 1036 | if (lastep==0 || *lastep==CBRA || *lastep==CKET) |
| 1037 | /* Not that smart, so treat * as nonspecial */ |
| 1038 | goto defchar; |
| 1039 | *lastep |= STAR; |
| 1040 | continue; |
| 1041 | |
| 1042 | case '$': |
| 1043 | /* $: match end of line */ |
| 1044 | if (*bp != '\0') |
| 1045 | /* $ only special at end of r.e. */ |
| 1046 | goto defchar; |
| 1047 | *ep++ = CDOL; |
| 1048 | continue; |
| 1049 | |
| 1050 | case '[': |
| 1051 | /* |
| 1052 | * [...]: any of chars enclosed in brackets. |
| 1053 | * Compiled form: CCL or NCCL, # of possible chars, |
| 1054 | * then each char. -'s are expanded. |
| 1055 | */ |
| 1056 | *ep++ = CCL; |
| 1057 | *ep++ = 0; |
| 1058 | cclcnt = 1; |
| 1059 | if ((c = *bp++) == '^') { |
| 1060 | /* [^...]: reverse sense of match */ |
| 1061 | c = *bp++; |
| 1062 | ep[-2] = NCCL; |
| 1063 | } |
| 1064 | do { /* for each char in brackets */ |
| 1065 | if (c=='\n') |
| 1066 | comerr("missing ]"); |
| 1067 | if (c == '-' && ep[-1] != 0) { |
| 1068 | /* form ...a-z... but [- not special */ |
| 1069 | if ((c = *bp++) == ']') { |
| 1070 | /* -] not special either */ |
| 1071 | *ep++ = '-'; |
| 1072 | cclcnt++; |
| 1073 | break; |
| 1074 | } |
| 1075 | while (ep[-1]<c) { |
| 1076 | /* insert all chars between */ |
| 1077 | *ep = ep[-1]+1; |
| 1078 | ep++; |
| 1079 | cclcnt++; |
| 1080 | if (ep>=&expbuf[BUFSIZ]) |
| 1081 | comerr("Too long"); |
| 1082 | } |
| 1083 | } |
| 1084 | *ep++ = c; |
| 1085 | cclcnt++; |
| 1086 | if (ep >= &expbuf[BUFSIZ]) |
| 1087 | comerr("Too long"); |
| 1088 | } while ((c = *bp++) != ']'); |
| 1089 | lastep[1] = cclcnt; /* backpatch count */ |
| 1090 | continue; |
| 1091 | |
| 1092 | defchar: |
| 1093 | default: |
| 1094 | /* |
| 1095 | * An ordinary char or one treated as ordinary. |
| 1096 | * Store CCHR followed by that char, rather than |
| 1097 | * just the char. This causes most r.e.'s to take |
| 1098 | * up about twice the space you would expect. |
| 1099 | * On the other hand, it makes r.e.'s beautifully |
| 1100 | * portable, even though the codes could be real |
| 1101 | * characters. |
| 1102 | */ |
| 1103 | *ep++ = CCHR; |
| 1104 | *ep++ = c; |
| 1105 | } |
| 1106 | } |
| 1107 | } |
| 1108 | |
| 1109 | /* |
| 1110 | * execute: look for the compiled r.e. on line addr. |
| 1111 | * gf is 0 if this is the first time on this line, otherwise nonzero. |
| 1112 | * If not first, start looking at locs, otherwise at beg of linebuf. |
| 1113 | * loc1 and loc2 are set to the ends of the pattern found, if any. |
| 1114 | * 1 is returned if successful, otherwise 0. |
| 1115 | */ |
| 1116 | execute(lptr) |
| 1117 | char *lptr; |
| 1118 | { |
| 1119 | register char *p1, *p2; |
| 1120 | register int c; |
| 1121 | |
| 1122 | for (c=0; c<NBRA; c++) { |
| 1123 | braslist[c] = 0; |
| 1124 | braelist[c] = 0; |
| 1125 | } |
| 1126 | p1 = lptr; |
| 1127 | p2 = expbuf; |
| 1128 | if (circfl) { |
| 1129 | /* anchored search (^): just try one advance. */ |
| 1130 | loc1 = p1; |
| 1131 | return(advance(p1, p2)); |
| 1132 | } |
| 1133 | /* fast check for first character */ |
| 1134 | if (*p2==CCHR) { |
| 1135 | c = p2[1]; |
| 1136 | do { |
| 1137 | if (*p1!=c) |
| 1138 | continue; |
| 1139 | if (advance(p1, p2)) { |
| 1140 | loc1 = p1; |
| 1141 | return(1); |
| 1142 | } |
| 1143 | } while (*p1++); |
| 1144 | return(0); |
| 1145 | } |
| 1146 | /* regular algorithm, try advance starting at each char position. */ |
| 1147 | do { |
| 1148 | if (advance(p1, p2)) { |
| 1149 | loc1 = p1; |
| 1150 | return(1); |
| 1151 | } |
| 1152 | } while (*p1++); |
| 1153 | return(0); |
| 1154 | } |
| 1155 | |
| 1156 | /* |
| 1157 | * advance: does an anchored search for expression starting at ep, |
| 1158 | * looking in line starting at lp. Returns 1 if matches, else 0. |
| 1159 | * If found, loc2 is set to end of pattern. |
| 1160 | */ |
| 1161 | advance(lp, ep) |
| 1162 | register char *ep, *lp; |
| 1163 | { |
| 1164 | register char *curlp; |
| 1165 | int i; |
| 1166 | |
| 1167 | for (;;) switch (*ep++) { /* for each code in r.e., look at it..*/ |
| 1168 | |
| 1169 | case CCHR: |
| 1170 | if (*ep++ == *lp++) |
| 1171 | continue; |
| 1172 | return(0); |
| 1173 | |
| 1174 | case CDOT: |
| 1175 | if (*lp++) |
| 1176 | continue; |
| 1177 | return(0); |
| 1178 | |
| 1179 | case CDOL: |
| 1180 | if (*lp==0) |
| 1181 | continue; |
| 1182 | return(0); |
| 1183 | |
| 1184 | case CEOF: |
| 1185 | loc2 = lp; |
| 1186 | return(1); |
| 1187 | |
| 1188 | case CCL: |
| 1189 | if (cclass(ep, *lp++, 1)) { |
| 1190 | ep += *ep; |
| 1191 | continue; |
| 1192 | } |
| 1193 | return(0); |
| 1194 | |
| 1195 | case NCCL: |
| 1196 | if (cclass(ep, *lp++, 0)) { |
| 1197 | ep += *ep; |
| 1198 | continue; |
| 1199 | } |
| 1200 | return(0); |
| 1201 | |
| 1202 | case CBRA: |
| 1203 | braslist[*ep++] = lp; |
| 1204 | continue; |
| 1205 | |
| 1206 | case CKET: |
| 1207 | braelist[*ep++] = lp; |
| 1208 | continue; |
| 1209 | |
| 1210 | case CBACK: |
| 1211 | if (braelist[i = *ep++]==0) |
| 1212 | error("bad back reference"); |
| 1213 | if (backref(i, lp)) { |
| 1214 | lp += braelist[i] - braslist[i]; |
| 1215 | continue; |
| 1216 | } |
| 1217 | return(0); |
| 1218 | |
| 1219 | case CBACK|STAR: |
| 1220 | if (braelist[i = *ep++] == 0) |
| 1221 | error("bad back reference"); |
| 1222 | curlp = lp; |
| 1223 | while (backref(i, lp)) |
| 1224 | lp += braelist[i] - braslist[i]; |
| 1225 | while (lp >= curlp) { |
| 1226 | if (advance(lp, ep)) |
| 1227 | return(1); |
| 1228 | lp -= braelist[i] - braslist[i]; |
| 1229 | } |
| 1230 | continue; |
| 1231 | |
| 1232 | case CDOT|STAR: |
| 1233 | curlp = lp; |
| 1234 | while (*lp++) |
| 1235 | ; |
| 1236 | goto star; |
| 1237 | |
| 1238 | case CCHR|STAR: |
| 1239 | curlp = lp; |
| 1240 | while (*lp++ == *ep) |
| 1241 | ; |
| 1242 | ep++; |
| 1243 | goto star; |
| 1244 | |
| 1245 | case CCL|STAR: |
| 1246 | case NCCL|STAR: |
| 1247 | curlp = lp; |
| 1248 | while (cclass(ep, *lp++, ep[-1]==(CCL|STAR))) |
| 1249 | ; |
| 1250 | ep += *ep; |
| 1251 | goto star; |
| 1252 | |
| 1253 | star: |
| 1254 | /* |
| 1255 | * star: special treatment. We have found as many of them |
| 1256 | * as there are to find. Maybe this was too many, as dictated |
| 1257 | * by what follows in the pattern. Try, starting from the |
| 1258 | * end, to recursively advance after each char found, |
| 1259 | * and return after first successful advance (thus finding |
| 1260 | * largest possible string that matches). |
| 1261 | */ |
| 1262 | do { |
| 1263 | lp--; |
| 1264 | if (lp==locs) |
| 1265 | break; |
| 1266 | if (advance(lp, ep)) |
| 1267 | return(1); |
| 1268 | } while (lp > curlp); |
| 1269 | /* star failed at all attempts, so whole pattern fails. */ |
| 1270 | return(0); |
| 1271 | |
| 1272 | default: |
| 1273 | longjmp (restore, 1); |
| 1274 | } |
| 1275 | } |
| 1276 | |
| 1277 | /* |
| 1278 | * backref: checks to see that text starting at lp matches previous |
| 1279 | * sub-expression #i. Returns 1 if successful, else 0. (Used for \k |
| 1280 | * on lhs.) |
| 1281 | */ |
| 1282 | backref(i, lp) |
| 1283 | register int i; |
| 1284 | register char *lp; |
| 1285 | { |
| 1286 | register char *bp; |
| 1287 | |
| 1288 | bp = braslist[i]; |
| 1289 | while (*bp++ == *lp++) |
| 1290 | if (bp >= braelist[i]) |
| 1291 | return(1); |
| 1292 | return(0); |
| 1293 | } |
| 1294 | |
| 1295 | /* |
| 1296 | * cclass: check to see if character c is in class starting at set. |
| 1297 | * ([...] construction on lhs of r.e.) af is sense of success/failure: |
| 1298 | * af=1 is normal (success returns 1), af=0 is reversed for [^ (success |
| 1299 | * returns 0). |
| 1300 | */ |
| 1301 | int |
| 1302 | cclass(set, c, af) |
| 1303 | register char *set, c; |
| 1304 | int af; |
| 1305 | { |
| 1306 | register n; |
| 1307 | |
| 1308 | if (c==0) |
| 1309 | return(0); |
| 1310 | n = *set++; |
| 1311 | while (--n) |
| 1312 | if (*set++ == c) |
| 1313 | return(af); |
| 1314 | return(!af); |
| 1315 | } |
| 1316 | |
| 1317 | error (mess) |
| 1318 | char *mess; |
| 1319 | { |
| 1320 | if (promptlen > 0) |
| 1321 | if (hard) |
| 1322 | putchar ('\n'); |
| 1323 | else |
| 1324 | kill_line (); |
| 1325 | promptlen += strlen (mess); |
| 1326 | if (Senter && Sexit) { |
| 1327 | tputs (Senter, 1, putch); |
| 1328 | pr(mess); |
| 1329 | tputs (Sexit, 1, putch); |
| 1330 | } |
| 1331 | else |
| 1332 | pr (mess); |
| 1333 | if (hard) |
| 1334 | putchar ('\n'); |
| 1335 | fflush(stdout); |
| 1336 | errors++; |
| 1337 | longjmp (restore, 1); |
| 1338 | } |
| 1339 | |
| 1340 | rdline (f) |
| 1341 | register FILE *f; |
| 1342 | { |
| 1343 | register char c; |
| 1344 | register char *p; |
| 1345 | |
| 1346 | p = Line; |
| 1347 | while ((c = getc (f)) != '\n' && c != EOF && p - Line < LINSIZ - 1) |
| 1348 | *p++ = c; |
| 1349 | *p = '\0'; |
| 1350 | } |