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