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