1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 34 __FBSDID("$FreeBSD$"); 35 36 #ifndef lint 37 static const char copyright[] = 38 "@(#) Copyright (c) 1980, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif 41 42 #ifndef lint 43 static const char sccsid[] = "@(#)vfontedpr.c 8.1 (Berkeley) 6/6/93"; 44 #endif 45 46 #include <sys/types.h> 47 #include <sys/stat.h> 48 #include <ctype.h> 49 #include <err.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <stdbool.h> 53 #include <string.h> 54 #include <time.h> 55 #include "pathnames.h" 56 #include "extern.h" 57 58 #define STANDARD 0 59 #define ALTERNATE 1 60 61 /* 62 * Vfontedpr. 63 * 64 * Dave Presotto 1/12/81 (adapted from an earlier version by Bill Joy) 65 * 66 */ 67 68 #define STRLEN 10 /* length of strings introducing things */ 69 #define PNAMELEN 40 /* length of a function/procedure name */ 70 #define PSMAX 20 /* size of procedure name stacking */ 71 72 static int iskw(char *); 73 static bool isproc(char *); 74 static void putKcp(char *, char *, bool); 75 static void putScp(char *); 76 static void putcp(int); 77 static int tabs(char *, char *); 78 static int width(char *, char *); 79 80 /* 81 * The state variables 82 */ 83 84 static bool filter = false; /* act as a filter (like eqn) */ 85 static bool inchr; /* in a string constant */ 86 static bool incomm; /* in a comment of the primary type */ 87 static bool idx = false; /* form an index */ 88 static bool instr; /* in a string constant */ 89 static bool nokeyw = false; /* no keywords being flagged */ 90 static bool pass = false; /* 91 * when acting as a filter, pass indicates 92 * whether we are currently processing 93 * input. 94 */ 95 96 static int blklevel; /* current nesting level */ 97 static int comtype; /* type of comment */ 98 static char * defsfile[2] = { _PATH_VGRINDEFS, 0 }; 99 /* name of language definitions file */ 100 static int margin; 101 static int plstack[PSMAX]; /* the procedure nesting level stack */ 102 static char pname[BUFSIZ+1]; 103 static bool prccont; /* continue last procedure */ 104 static int psptr; /* the stack index of the current procedure */ 105 static char pstack[PSMAX][PNAMELEN+1]; /* the procedure name stack */ 106 107 /* 108 * The language specific globals 109 */ 110 111 char *l_acmbeg; /* string introducing a comment */ 112 char *l_acmend; /* string ending a comment */ 113 char *l_blkbeg; /* string beginning of a block */ 114 char *l_blkend; /* string ending a block */ 115 char *l_chrbeg; /* delimiter for character constant */ 116 char *l_chrend; /* delimiter for character constant */ 117 char *l_combeg; /* string introducing a comment */ 118 char *l_comend; /* string ending a comment */ 119 char l_escape; /* character used to escape characters */ 120 char *l_keywds[BUFSIZ/2]; /* keyword table address */ 121 char *l_nocom; /* regexp for non-comments */ 122 char *l_prcbeg; /* regular expr for procedure begin */ 123 char *l_strbeg; /* delimiter for string constant */ 124 char *l_strend; /* delimiter for string constant */ 125 bool l_toplex; /* procedures only defined at top lex level */ 126 const char *language = "c"; /* the language indicator */ 127 128 #define ps(x) printf("%s", x) 129 static char minus[] = "-"; 130 static char minusn[] = "-n"; 131 132 int 133 main(int argc, char **argv) 134 { 135 const char *fname = ""; 136 struct stat stbuf; 137 char buf[BUFSIZ]; 138 char *defs; 139 int needbp = 0; 140 141 argc--, argv++; 142 do { 143 char *cp; 144 int i; 145 146 if (argc > 0) { 147 if (!strcmp(argv[0], "-h")) { 148 if (argc == 1) { 149 printf("'ds =H\n"); 150 argc = 0; 151 goto rest; 152 } 153 printf("'ds =H %s\n", argv[1]); 154 argc--, argv++; 155 argc--, argv++; 156 if (argc > 0) 157 continue; 158 goto rest; 159 } 160 161 /* act as a filter like eqn */ 162 if (!strcmp(argv[0], "-f")) { 163 filter = true; 164 argv[0] = argv[argc-1]; 165 argv[argc-1] = minus; 166 continue; 167 } 168 169 /* take input from the standard place */ 170 if (!strcmp(argv[0], "-")) { 171 argc = 0; 172 goto rest; 173 } 174 175 /* build an index */ 176 if (!strcmp(argv[0], "-x")) { 177 idx = true; 178 argv[0] = minusn; 179 } 180 181 /* indicate no keywords */ 182 if (!strcmp(argv[0], "-n")) { 183 nokeyw = true; 184 argc--, argv++; 185 continue; 186 } 187 188 /* specify the font size */ 189 if (!strncmp(argv[0], "-s", 2)) { 190 i = 0; 191 cp = argv[0] + 2; 192 while (*cp) 193 i = i * 10 + (*cp++ - '0'); 194 printf("'ps %d\n'vs %d\n", i, i+1); 195 argc--, argv++; 196 continue; 197 } 198 199 /* specify the language */ 200 if (!strncmp(argv[0], "-l", 2)) { 201 language = argv[0]+2; 202 argc--, argv++; 203 continue; 204 } 205 206 /* specify the language description file */ 207 if (!strncmp(argv[0], "-d", 2)) { 208 defsfile[0] = argv[1]; 209 argc--, argv++; 210 argc--, argv++; 211 continue; 212 } 213 214 /* open the file for input */ 215 if (freopen(argv[0], "r", stdin) == NULL) 216 err(1, "%s", argv[0]); 217 if (idx) 218 printf("'ta 4i 4.25i 5.5iR\n'in .5i\n"); 219 fname = argv[0]; 220 argc--, argv++; 221 } 222 rest: 223 224 /* 225 * get the language definition from the defs file 226 */ 227 i = cgetent(&defs, defsfile, language); 228 if (i == -1) { 229 fprintf (stderr, "no entry for language %s\n", language); 230 exit(0); 231 } else if (i == -2) { fprintf(stderr, 232 "cannot find vgrindefs file %s\n", defsfile[0]); 233 exit(0); 234 } else if (i == -3) { fprintf(stderr, 235 "potential reference loop detected in vgrindefs file %s\n", 236 defsfile[0]); 237 exit(0); 238 } 239 if (cgetustr(defs, "kw", &cp) == -1) 240 nokeyw = true; 241 else { 242 char **cpp; 243 244 cpp = l_keywds; 245 while (*cp) { 246 while (*cp == ' ' || *cp =='\t') 247 *cp++ = '\0'; 248 if (*cp) 249 *cpp++ = cp; 250 while (*cp != ' ' && *cp != '\t' && *cp) 251 cp++; 252 } 253 *cpp = NULL; 254 } 255 cgetustr(defs, "pb", &cp); 256 l_prcbeg = convexp(cp); 257 cgetustr(defs, "cb", &cp); 258 l_combeg = convexp(cp); 259 cgetustr(defs, "ce", &cp); 260 l_comend = convexp(cp); 261 cgetustr(defs, "ab", &cp); 262 l_acmbeg = convexp(cp); 263 cgetustr(defs, "ae", &cp); 264 l_acmend = convexp(cp); 265 cgetustr(defs, "sb", &cp); 266 l_strbeg = convexp(cp); 267 cgetustr(defs, "se", &cp); 268 l_strend = convexp(cp); 269 cgetustr(defs, "bb", &cp); 270 l_blkbeg = convexp(cp); 271 cgetustr(defs, "be", &cp); 272 l_blkend = convexp(cp); 273 cgetustr(defs, "lb", &cp); 274 l_chrbeg = convexp(cp); 275 cgetustr(defs, "le", &cp); 276 l_chrend = convexp(cp); 277 if (cgetustr(defs, "nc", &cp) >= 0) 278 l_nocom = convexp(cp); 279 l_escape = '\\'; 280 l_onecase = (cgetcap(defs, "oc", ':') != NULL); 281 l_toplex = (cgetcap(defs, "tl", ':') != NULL); 282 283 /* initialize the program */ 284 285 incomm = false; 286 instr = false; 287 inchr = false; 288 _escaped = false; 289 blklevel = 0; 290 for (psptr=0; psptr<PSMAX; psptr++) { 291 pstack[psptr][0] = '\0'; 292 plstack[psptr] = 0; 293 } 294 psptr = -1; 295 ps("'-F\n"); 296 if (!filter) { 297 printf(".ds =F %s\n", fname); 298 ps("'wh 0 vH\n"); 299 ps("'wh -1i vF\n"); 300 } 301 if (needbp) { 302 needbp = 0; 303 printf(".()\n"); 304 printf(".bp\n"); 305 } 306 if (!filter) { 307 fstat(fileno(stdin), &stbuf); 308 cp = ctime(&stbuf.st_mtime); 309 cp[16] = '\0'; 310 cp[24] = '\0'; 311 printf(".ds =M %s %s\n", cp+4, cp+20); 312 } 313 314 /* 315 * MAIN LOOP!!! 316 */ 317 while (fgets(buf, sizeof buf, stdin) != NULL) { 318 if (buf[0] == '\f') { 319 printf(".bp\n"); 320 } 321 if (buf[0] == '.') { 322 printf("%s", buf); 323 if (!strncmp (buf+1, "vS", 2)) 324 pass = true; 325 if (!strncmp (buf+1, "vE", 2)) 326 pass = false; 327 continue; 328 } 329 prccont = false; 330 if (!filter || pass) 331 putScp(buf); 332 else 333 printf("%s", buf); 334 if (prccont && (psptr >= 0)) { 335 ps("'FC "); 336 ps(pstack[psptr]); 337 ps("\n"); 338 } 339 #ifdef DEBUG 340 printf ("com %o str %o chr %o ptr %d\n", incomm, instr, inchr, psptr); 341 #endif 342 margin = 0; 343 } 344 needbp = 1; 345 } while (argc > 0); 346 exit(0); 347 } 348 349 #define isidchr(c) (isalnum(c) || (c) == '_') 350 351 static void 352 putScp(char *os) 353 { 354 register char *s = os; /* pointer to unmatched string */ 355 char dummy[BUFSIZ]; /* dummy to be used by expmatch */ 356 char *comptr; /* end of a comment delimiter */ 357 char *acmptr; /* end of a comment delimiter */ 358 char *strptr; /* end of a string delimiter */ 359 char *chrptr; /* end of a character const delimiter */ 360 char *blksptr; /* end of a lexical block start */ 361 char *blkeptr; /* end of a lexical block end */ 362 char *nocomptr; /* end of a non-comment delimiter */ 363 364 s_start = os; /* remember the start for expmatch */ 365 _escaped = false; 366 if (nokeyw || incomm || instr) 367 goto skip; 368 if (isproc(s)) { 369 ps("'FN "); 370 ps(pname); 371 ps("\n"); 372 if (psptr < PSMAX) { 373 ++psptr; 374 strncpy (pstack[psptr], pname, PNAMELEN); 375 pstack[psptr][PNAMELEN] = '\0'; 376 plstack[psptr] = blklevel; 377 } 378 } 379 skip: 380 do { 381 /* check for string, comment, blockstart, etc */ 382 if (!incomm && !instr && !inchr) { 383 384 blkeptr = expmatch(s, l_blkend, dummy); 385 blksptr = expmatch(s, l_blkbeg, dummy); 386 comptr = expmatch(s, l_combeg, dummy); 387 acmptr = expmatch(s, l_acmbeg, dummy); 388 strptr = expmatch(s, l_strbeg, dummy); 389 chrptr = expmatch(s, l_chrbeg, dummy); 390 nocomptr = expmatch (s, l_nocom, dummy); 391 392 /* start of non-comment? */ 393 if (nocomptr != NULL) 394 if ((nocomptr <= comptr || comptr == NULL) 395 && (nocomptr <= acmptr || acmptr == NULL)) { 396 /* continue after non-comment */ 397 putKcp (s, nocomptr-1, false); 398 s = nocomptr; 399 continue; 400 } 401 402 /* start of a comment? */ 403 if (comptr != NULL) 404 if ((comptr < strptr || strptr == NULL) 405 && (comptr < acmptr || acmptr == NULL) 406 && (comptr < chrptr || chrptr == NULL) 407 && (comptr < blksptr || blksptr == NULL) 408 && (comptr < blkeptr || blkeptr == NULL)) { 409 putKcp(s, comptr-1, false); 410 s = comptr; 411 incomm = true; 412 comtype = STANDARD; 413 if (s != os) 414 ps("\\c"); 415 ps("\\c\n'+C\n"); 416 continue; 417 } 418 419 /* start of a comment? */ 420 if (acmptr != NULL) 421 if ((acmptr < strptr || strptr == NULL) 422 && (acmptr < chrptr || chrptr == NULL) 423 && (acmptr < blksptr || blksptr == NULL) 424 && (acmptr < blkeptr || blkeptr == NULL)) { 425 putKcp(s, acmptr-1, false); 426 s = acmptr; 427 incomm = true; 428 comtype = ALTERNATE; 429 if (s != os) 430 ps("\\c"); 431 ps("\\c\n'+C\n"); 432 continue; 433 } 434 435 /* start of a string? */ 436 if (strptr != NULL) 437 if ((strptr < chrptr || chrptr == NULL) 438 && (strptr < blksptr || blksptr == NULL) 439 && (strptr < blkeptr || blkeptr == NULL)) { 440 putKcp(s, strptr-1, false); 441 s = strptr; 442 instr = true; 443 continue; 444 } 445 446 /* start of a character string? */ 447 if (chrptr != NULL) 448 if ((chrptr < blksptr || blksptr == NULL) 449 && (chrptr < blkeptr || blkeptr == NULL)) { 450 putKcp(s, chrptr-1, false); 451 s = chrptr; 452 inchr = true; 453 continue; 454 } 455 456 /* end of a lexical block */ 457 if (blkeptr != NULL) { 458 if (blkeptr < blksptr || blksptr == NULL) { 459 putKcp(s, blkeptr - 1, false); 460 s = blkeptr; 461 if (blklevel > 0 /* sanity */) 462 blklevel--; 463 if (psptr >= 0 && plstack[psptr] >= blklevel) { 464 465 /* end of current procedure */ 466 if (s != os) 467 ps("\\c"); 468 ps("\\c\n'-F\n"); 469 blklevel = plstack[psptr]; 470 471 /* see if we should print the last proc name */ 472 if (--psptr >= 0) 473 prccont = true; 474 else 475 psptr = -1; 476 } 477 continue; 478 } 479 } 480 481 /* start of a lexical block */ 482 if (blksptr != NULL) { 483 putKcp(s, blksptr - 1, false); 484 s = blksptr; 485 blklevel++; 486 continue; 487 } 488 489 /* check for end of comment */ 490 } else if (incomm) { 491 comptr = expmatch(s, l_comend, dummy); 492 acmptr = expmatch(s, l_acmend, dummy); 493 if (((comtype == STANDARD) && (comptr != NULL)) || 494 ((comtype == ALTERNATE) && (acmptr != NULL))) { 495 if (comtype == STANDARD) { 496 putKcp(s, comptr-1, true); 497 s = comptr; 498 } else { 499 putKcp(s, acmptr-1, true); 500 s = acmptr; 501 } 502 incomm = false; 503 ps("\\c\n'-C\n"); 504 continue; 505 } else { 506 putKcp(s, s + strlen(s) -1, true); 507 s = s + strlen(s); 508 continue; 509 } 510 511 /* check for end of string */ 512 } else if (instr) { 513 if ((strptr = expmatch(s, l_strend, dummy)) != NULL) { 514 putKcp(s, strptr-1, true); 515 s = strptr; 516 instr = false; 517 continue; 518 } else { 519 putKcp(s, s+strlen(s)-1, true); 520 s = s + strlen(s); 521 continue; 522 } 523 524 /* check for end of character string */ 525 } else if (inchr) { 526 if ((chrptr = expmatch(s, l_chrend, dummy)) != NULL) { 527 putKcp(s, chrptr-1, true); 528 s = chrptr; 529 inchr = false; 530 continue; 531 } else { 532 putKcp(s, s+strlen(s)-1, true); 533 s = s + strlen(s); 534 continue; 535 } 536 } 537 538 /* print out the line */ 539 putKcp(s, s + strlen(s) -1, false); 540 s = s + strlen(s); 541 } while (*s); 542 } 543 544 /* 545 * start: start of string to write 546 * end: end of string to write 547 * force: true if we should force nokeyw 548 */ 549 static void 550 putKcp(char *start, char *end, bool force) 551 { 552 int i; 553 int xfld = 0; 554 555 while (start <= end) { 556 if (idx) { 557 if (*start == ' ' || *start == '\t') { 558 if (xfld == 0) 559 printf("\001"); 560 printf("\t"); 561 xfld = 1; 562 while (*start == ' ' || *start == '\t') 563 start++; 564 continue; 565 } 566 } 567 568 /* take care of nice tab stops */ 569 if (*start == '\t') { 570 while (*start == '\t') 571 start++; 572 i = tabs(s_start, start) - margin / 8; 573 printf("\\h'|%dn'", i * 10 + 1 - margin % 8); 574 continue; 575 } 576 577 if (!nokeyw && !force) 578 if ((*start == '#' || isidchr(*start)) 579 && (start == s_start || !isidchr(start[-1]))) { 580 i = iskw(start); 581 if (i > 0) { 582 ps("\\*(+K"); 583 do 584 putcp((unsigned char)*start++); 585 while (--i > 0); 586 ps("\\*(-K"); 587 continue; 588 } 589 } 590 591 putcp((unsigned char)*start++); 592 } 593 } 594 595 596 static int 597 tabs(char *s, char *os) 598 { 599 600 return (width(s, os) / 8); 601 } 602 603 static int 604 width(register char *s, register char *os) 605 { 606 register int i = 0; 607 608 while (s < os) { 609 if (*s == '\t') { 610 i = (i + 8) &~ 7; 611 s++; 612 continue; 613 } 614 if (*s < ' ') 615 i += 2; 616 else 617 i++; 618 s++; 619 } 620 return (i); 621 } 622 623 static void 624 putcp(register int c) 625 { 626 627 switch(c) { 628 629 case 0: 630 break; 631 632 case '\f': 633 break; 634 635 case '\r': 636 break; 637 638 case '{': 639 ps("\\*(+K{\\*(-K"); 640 break; 641 642 case '}': 643 ps("\\*(+K}\\*(-K"); 644 break; 645 646 case '\\': 647 ps("\\e"); 648 break; 649 650 case '_': 651 ps("\\*_"); 652 break; 653 654 case '-': 655 ps("\\*-"); 656 break; 657 658 case '`': 659 ps("\\`"); 660 break; 661 662 case '\'': 663 ps("\\'"); 664 break; 665 666 case '.': 667 ps("\\&."); 668 break; 669 670 case '*': 671 ps("\\fI*\\fP"); 672 break; 673 674 case '/': 675 ps("\\fI\\h'\\w' 'u-\\w'/'u'/\\fP"); 676 break; 677 678 default: 679 if (c < 040) 680 putchar('^'), c |= '@'; 681 case '\t': 682 case '\n': 683 putchar(c); 684 } 685 } 686 687 /* 688 * look for a process beginning on this line 689 */ 690 static bool 691 isproc(char *s) 692 { 693 pname[0] = '\0'; 694 if (!l_toplex || blklevel == 0) 695 if (expmatch(s, l_prcbeg, pname) != NULL) { 696 return (true); 697 } 698 return (false); 699 } 700 701 702 /* iskw - check to see if the next word is a keyword 703 */ 704 705 static int 706 iskw(register char *s) 707 { 708 register char **ss = l_keywds; 709 register int i = 1; 710 register char *cp = s; 711 712 while (++cp, isidchr(*cp)) 713 i++; 714 while ((cp = *ss++)) 715 if (!STRNCMP(s,cp,i) && !isidchr(cp[i])) 716 return (i); 717 return (0); 718 } 719