1/*	$NetBSD: vfontedpr.c,v 1.19 2022/01/24 09:14:37 andvar Exp $	*/
2
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#if HAVE_NBTOOL_CONFIG_H
33#include "nbtool_config.h"
34#endif
35
36#include <sys/cdefs.h>
37#ifndef lint
38__COPYRIGHT("@(#) Copyright (c) 1980, 1993\
39 The Regents of the University of California.  All rights reserved.");
40#endif /* not lint */
41
42#ifndef lint
43#if 0
44static char sccsid[] = "@(#)vfontedpr.c	8.1 (Berkeley) 6/6/93";
45#endif
46__RCSID("$NetBSD: vfontedpr.c,v 1.19 2022/01/24 09:14:37 andvar Exp $");
47#endif /* not lint */
48
49#include <sys/types.h>
50#include <sys/stat.h>
51#include <time.h>
52#include <ctype.h>
53#include <stdlib.h>
54#include <stdbool.h>
55#include <string.h>
56#include <stdio.h>
57#include "pathnames.h"
58#include "extern.h"
59
60#define STANDARD 0
61#define ALTERNATE 1
62
63/*
64 * Vfontedpr.
65 *
66 * Dave Presotto 1/12/81 (adapted from an earlier version by Bill Joy)
67 *
68 */
69
70#define STRLEN 10		/* length of strings introducing things */
71#define PNAMELEN 40		/* length of a function/procedure name */
72#define PSMAX 20		/* size of procedure name stacking */
73
74static int       iskw(char *);
75static bool      isproc(char *);
76static void      putKcp(char *, char *, bool);
77static void      putScp(char *);
78static void      putcp(int);
79static int       tabs(char *, char *);
80static int       width(char *, char *);
81
82/*
83 *	The state variables
84 */
85
86static bool	filter = false;	/* act as a filter (like eqn) */
87static bool	inchr;		/* in a string constant */
88static bool	incomm;		/* in a comment of the primary type */
89static bool	idx = false;	/* form an index */
90static bool	instr;		/* in a string constant */
91static bool	nokeyw = false;	/* no keywords being flagged */
92static bool	pass = false;	/*
93				 * when acting as a filter, pass indicates
94				 * whether we are currently processing
95				 * input.
96				 */
97
98static int	blklevel;	/* current nesting level */
99static int	comtype;	/* type of comment */
100static const char *defsfile[2] = { _PATH_VGRINDEFS, 0 };
101				/* name of language definitions file */
102static int	margin;
103static int	plstack[PSMAX];	/* the procedure nesting level stack */
104static char	pname[BUFSIZ+1];
105static bool  prccont;	/* continue last procedure */
106static int	psptr;		/* the stack index of the current procedure */
107static char	pstack[PSMAX][PNAMELEN+1];	/* the procedure name stack */
108
109/*
110 *	The language specific globals
111 */
112
113char	*l_acmbeg;		/* string introducing a comment */
114char	*l_acmend;		/* string ending a comment */
115char	*l_blkbeg;		/* string beginning of a block */
116char	*l_blkend;		/* string ending a block */
117char    *l_chrbeg;		/* delimiter for character constant */
118char    *l_chrend;		/* delimiter for character constant */
119char	*l_combeg;		/* string introducing a comment */
120char	*l_comend;		/* string ending a comment */
121char	 l_escape;		/* character used to  escape characters */
122char	*l_keywds[BUFSIZ/2];	/* keyword table address */
123char	*l_prcbeg;		/* regular expr for procedure begin */
124char    *l_strbeg;		/* delimiter for string constant */
125char    *l_strend;		/* delimiter for string constant */
126bool	 l_toplex;		/* procedures only defined at top lex level */
127const char *language = "c";	/* the language indicator */
128
129#define	ps(x)	printf("%s", x)
130static char minus[] = "-";
131static char minusn[] = "-n";
132
133int
134main(int argc, char *argv[])
135{
136    const char *fname = "";
137    struct stat stbuf;
138    char buf[BUFSIZ];
139    char *defs;
140    int needbp = 0;
141
142    argc--, argv++;
143    do {
144	char *cp;
145	int i;
146
147	if (argc > 0) {
148	    if (!strcmp(argv[0], "-h")) {
149		if (argc == 1) {
150		    printf("'ds =H\n");
151		    argc = 0;
152		    goto rest;
153		}
154		printf("'ds =H %s\n", argv[1]);
155		argc--, argv++;
156		argc--, argv++;
157		if (argc > 0)
158		    continue;
159		goto rest;
160	    }
161
162	    /* act as a filter like eqn */
163	    if (!strcmp(argv[0], "-f")) {
164		filter=true;
165		argv[0] = argv[argc-1];
166		argv[argc-1] = minus;
167		continue;
168	    }
169
170	    /* take input from the standard place */
171	    if (!strcmp(argv[0], "-")) {
172		argc = 0;
173		goto rest;
174	    }
175
176	    /* build an index */
177	    if (!strcmp(argv[0], "-x")) {
178		idx=true;
179		argv[0] = minusn;
180	    }
181
182	    /* indicate no keywords */
183	    if (!strcmp(argv[0], "-n")) {
184		nokeyw=true;
185		argc--, argv++;
186		continue;
187	    }
188
189	    /* specify the font size */
190	    if (!strncmp(argv[0], "-s", 2)) {
191		i = 0;
192		cp = argv[0] + 2;
193		while (*cp)
194		    i = i * 10 + (*cp++ - '0');
195		printf("'ps %d\n'vs %d\n", i, i+1);
196		argc--, argv++;
197		continue;
198	    }
199
200	    /* specify the language */
201	    if (!strncmp(argv[0], "-l", 2)) {
202		language = argv[0]+2;
203		argc--, argv++;
204		continue;
205	    }
206
207	    /* specify the language description file */
208	    if (!strncmp(argv[0], "-d", 2)) {
209		defsfile[0] = argv[1];
210		argc--, argv++;
211		argc--, argv++;
212		continue;
213	    }
214
215	    /* open the file for input */
216	    if (freopen(argv[0], "r", stdin) == NULL) {
217		perror(argv[0]);
218		exit(1);
219	    }
220	    if (idx)
221		printf("'ta 4i 4.25i 5.5iR\n'in .5i\n");
222	    fname = argv[0];
223	    argc--, argv++;
224	}
225    rest:
226
227	/*
228	 *  get the  language definition from the defs file
229	 */
230	i = cgetent(&defs, defsfile, language);
231	if (i == -1) {
232	    fprintf (stderr, "no entry for language %s\n", language);
233	    exit(0);
234	} else  if (i == -2) { fprintf(stderr,
235	    "cannot find vgrindefs file %s\n", defsfile[0]);
236	    exit(0);
237	} else if (i == -3) { fprintf(stderr,
238	    "potential reference loop detected in vgrindefs file %s\n",
239            defsfile[0]);
240	    exit(0);
241	}
242	if (cgetustr(defs, "kw", &cp) == -1)
243	    nokeyw = true;
244	else  {
245	    char **cpp;
246
247	    cpp = l_keywds;
248	    while (*cp) {
249		while (*cp == ' ' || *cp =='\t')
250		    *cp++ = '\0';
251		if (*cp)
252		    *cpp++ = cp;
253		while (*cp != ' ' && *cp  != '\t' && *cp)
254		    cp++;
255	    }
256	    *cpp = NULL;
257	}
258	cgetustr(defs, "pb", &cp);
259	l_prcbeg = convexp(cp);
260	cgetustr(defs, "cb", &cp);
261	l_combeg = convexp(cp);
262	cgetustr(defs, "ce", &cp);
263	l_comend = convexp(cp);
264	cgetustr(defs, "ab", &cp);
265	l_acmbeg = convexp(cp);
266	cgetustr(defs, "ae", &cp);
267	l_acmend = convexp(cp);
268	cgetustr(defs, "sb", &cp);
269	l_strbeg = convexp(cp);
270	cgetustr(defs, "se", &cp);
271	l_strend = convexp(cp);
272	cgetustr(defs, "bb", &cp);
273	l_blkbeg = convexp(cp);
274	cgetustr(defs, "be", &cp);
275	l_blkend = convexp(cp);
276	cgetustr(defs, "lb", &cp);
277	l_chrbeg = convexp(cp);
278	cgetustr(defs, "le", &cp);
279	l_chrend = convexp(cp);
280	l_escape = '\\';
281	l_onecase = (cgetcap(defs, "oc", ':') != NULL);
282	l_toplex = (cgetcap(defs, "tl", ':') != NULL);
283
284	/* initialize the program */
285
286	incomm = false;
287	instr = false;
288	inchr = false;
289	x_escaped = false;
290	blklevel = 0;
291	for (psptr=0; psptr<PSMAX; psptr++) {
292	    pstack[psptr][0] = '\0';
293	    plstack[psptr] = 0;
294	}
295	psptr = -1;
296	ps("'-F\n");
297	if (!filter) {
298	    printf(".ds =F %s\n", fname);
299	    ps("'wh 0 vH\n");
300	    ps("'wh -1i vF\n");
301	}
302	if (needbp) {
303	    needbp = 0;
304	    printf(".()\n");
305	    printf(".bp\n");
306	}
307	if (!filter) {
308	    fstat(fileno(stdin), &stbuf);
309	    cp = ctime(&stbuf.st_mtime);
310	    cp[16] = '\0';
311	    cp[24] = '\0';
312	    printf(".ds =M %s %s\n", cp+4, cp+20);
313	}
314
315	/*
316	 *	MAIN LOOP!!!
317	 */
318	while (fgets(buf, sizeof buf, stdin) != NULL) {
319	    if (buf[0] == '\f') {
320		printf(".bp\n");
321	    }
322	    if (buf[0] == '.') {
323		printf("%s", buf);
324		if (!strncmp (buf+1, "vS", 2))
325		    pass = true;
326		if (!strncmp (buf+1, "vE", 2))
327		    pass = false;
328		continue;
329	    }
330	    prccont = false;
331	    if (!filter || pass)
332		putScp(buf);
333	    else
334		printf("%s", buf);
335	    if (prccont && (psptr >= 0)) {
336		ps("'FC ");
337		ps(pstack[psptr]);
338		ps("\n");
339	    }
340#ifdef DEBUG
341	    printf ("com %o str %o chr %o ptr %d\n", incomm, instr, inchr, psptr);
342#endif
343	    margin = 0;
344	}
345	needbp = 1;
346    } while (argc > 0);
347    exit(0);
348}
349
350#define isidchr(c) (isalnum((unsigned char)(c)) || (c) == '_')
351
352static void
353putScp(char *os)
354{
355    char *s = os;			/* pointer to unmatched string */
356    char dummy[BUFSIZ];			/* dummy to be used by expmatch */
357    char *comptr;			/* end of a comment delimiter */
358    char *acmptr;			/* end of a comment delimiter */
359    char *strptr;			/* end of a string delimiter */
360    char *chrptr;			/* end of a character const delimiter */
361    char *blksptr;			/* end of a lexical block start */
362    char *blkeptr;			/* end of a lexical block end */
363
364    x_start = os;			/* remember the start for expmatch */
365    x_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	    strlcpy(pstack[psptr], pname, sizeof(pstack[psptr]));
375	    plstack[psptr] = blklevel;
376	}
377    }
378skip:
379    do {
380	/* check for string, comment, blockstart, etc */
381	if (!incomm && !instr && !inchr) {
382
383	    blkeptr = expmatch(s, l_blkend, dummy);
384	    blksptr = expmatch(s, l_blkbeg, dummy);
385	    comptr = expmatch(s, l_combeg, dummy);
386	    acmptr = expmatch(s, l_acmbeg, dummy);
387	    strptr = expmatch(s, l_strbeg, dummy);
388	    chrptr = expmatch(s, l_chrbeg, dummy);
389
390	    /* start of a comment? */
391	    if (comptr != NULL)
392		if ((comptr < strptr || strptr == NULL)
393		  && (comptr < acmptr || acmptr == NULL)
394		  && (comptr < chrptr || chrptr == NULL)
395		  && (comptr < blksptr || blksptr == NULL)
396		  && (comptr < blkeptr || blkeptr == NULL)) {
397		    putKcp(s, comptr-1, false);
398		    s = comptr;
399		    incomm = true;
400		    comtype = STANDARD;
401		    if (s != os)
402			ps("\\c");
403		    ps("\\c\n'+C\n");
404		    continue;
405		}
406
407	    /* start of a comment? */
408	    if (acmptr != NULL)
409		if ((acmptr < strptr || strptr == NULL)
410		  && (acmptr < chrptr || chrptr == NULL)
411		  && (acmptr < blksptr || blksptr == NULL)
412		  && (acmptr < blkeptr || blkeptr == NULL)) {
413		    putKcp(s, acmptr-1, false);
414		    s = acmptr;
415		    incomm = true;
416		    comtype = ALTERNATE;
417		    if (s != os)
418			ps("\\c");
419		    ps("\\c\n'+C\n");
420		    continue;
421		}
422
423	    /* start of a string? */
424	    if (strptr != NULL)
425		if ((strptr < chrptr || chrptr == NULL)
426		  && (strptr < blksptr || blksptr == NULL)
427		  && (strptr < blkeptr || blkeptr == NULL)) {
428		    putKcp(s, strptr-1, false);
429		    s = strptr;
430		    instr = true;
431		    continue;
432		}
433
434	    /* start of a character string? */
435	    if (chrptr != NULL)
436		if ((chrptr < blksptr || blksptr == NULL)
437		  && (chrptr < blkeptr || blkeptr == NULL)) {
438		    putKcp(s, chrptr-1, false);
439		    s = chrptr;
440		    inchr = true;
441		    continue;
442		}
443
444	    /* end of a lexical block */
445	    if (blkeptr != NULL) {
446		if (blkeptr < blksptr || blksptr == NULL) {
447		    putKcp(s, blkeptr - 1, false);
448		    s = blkeptr;
449		    blklevel--;
450		    if (psptr >= 0 && plstack[psptr] >= blklevel) {
451
452			/* end of current procedure */
453			if (s != os)
454			    ps("\\c");
455			ps("\\c\n'-F\n");
456			blklevel = plstack[psptr];
457
458			/* see if we should print the last proc name */
459			if (--psptr >= 0)
460			    prccont = true;
461			else
462			    psptr = -1;
463		    }
464		    continue;
465		}
466	    }
467
468	    /* start of a lexical block */
469	    if (blksptr != NULL) {
470		putKcp(s, blksptr - 1, false);
471		s = blksptr;
472		blklevel++;
473		continue;
474	    }
475
476	/* check for end of comment */
477	} else if (incomm) {
478	    comptr = expmatch(s, l_comend, dummy);
479	    acmptr = expmatch(s, l_acmend, dummy);
480	    if (((comtype == STANDARD) && (comptr != NULL)) ||
481	        ((comtype == ALTERNATE) && (acmptr != NULL))) {
482		if (comtype == STANDARD) {
483		    putKcp(s, comptr-1, true);
484		    s = comptr;
485		} else {
486		    putKcp(s, acmptr-1, true);
487		    s = acmptr;
488		}
489		incomm = false;
490		ps("\\c\n'-C\n");
491		continue;
492	    } else {
493		putKcp(s, s + strlen(s) -1, true);
494		s = s + strlen(s);
495		continue;
496	    }
497
498	/* check for end of string */
499	} else if (instr) {
500	    if ((strptr = expmatch(s, l_strend, dummy)) != NULL) {
501		putKcp(s, strptr-1, true);
502		s = strptr;
503		instr = false;
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 character string */
512	} else if (inchr) {
513	    if ((chrptr = expmatch(s, l_chrend, dummy)) != NULL) {
514		putKcp(s, chrptr-1, true);
515		s = chrptr;
516		inchr = false;
517		continue;
518	    } else {
519		putKcp(s, s+strlen(s)-1, true);
520		s = s + strlen(s);
521		continue;
522	    }
523	}
524
525	/* print out the line */
526	putKcp(s, s + strlen(s) -1, false);
527	s = s + strlen(s);
528    } while (*s);
529}
530
531static void
532putKcp(
533    char	*start,		/* start of string to write */
534    char	*end,		/* end of string to write */
535    bool	force)		/* true if we should force nokeyw */
536{
537    int i;
538    int xfld = 0;
539
540    while (start <= end) {
541	if (idx) {
542	    if (*start == ' ' || *start == '\t') {
543		if (xfld == 0)
544		    printf("");
545		printf("\t");
546		xfld = 1;
547		while (*start == ' ' || *start == '\t')
548		    start++;
549		continue;
550	    }
551	}
552
553	/* take care of nice tab stops */
554	if (*start == '\t') {
555	    while (*start == '\t')
556		start++;
557	    i = tabs(x_start, start) - margin / 8;
558	    printf("\\h'|%dn'", i * 10 + 1 - margin % 8);
559	    continue;
560	}
561
562	if (!nokeyw && !force)
563	    if ((*start == '#' || isidchr(*start))
564	    && (start == x_start || !isidchr(start[-1]))) {
565		i = iskw(start);
566		if (i > 0) {
567		    ps("\\*(+K");
568		    do
569			putcp(*start++);
570		    while (--i > 0);
571		    ps("\\*(-K");
572		    continue;
573		}
574	    }
575
576	putcp(*start++);
577    }
578}
579
580
581static int
582tabs(char *s, char *os)
583{
584
585    return width(s, os) / 8;
586}
587
588static int
589width(char *s, char *os)
590{
591	int i = 0;
592
593	while (s < os) {
594		if (*s == '\t') {
595			i = (i + 8) &~ 7;
596			s++;
597			continue;
598		}
599		if (*s < ' ')
600			i += 2;
601		else
602			i++;
603		s++;
604	}
605	return i;
606}
607
608static void
609putcp(int c)
610{
611
612	switch(c) {
613
614	case 0:
615		break;
616
617	case '\f':
618		break;
619
620	case '{':
621		ps("\\*(+K{\\*(-K");
622		break;
623
624	case '}':
625		ps("\\*(+K}\\*(-K");
626		break;
627
628	case '\\':
629		ps("\\e");
630		break;
631
632	case '_':
633		ps("\\*_");
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("\\fI*\\fP");
654		break;
655
656	case '/':
657		ps("\\fI\\h'\\w' 'u-\\w'/'u'/\\fP");
658		break;
659
660	default:
661		if (c < 040)
662			putchar('^'), c |= '@';
663		/* FALLTHROUGH */
664	case '\t':
665	case '\n':
666		putchar(c);
667	}
668}
669
670/*
671 *	look for a process beginning on this line
672 */
673static bool
674isproc(char *s)
675{
676    pname[0] = '\0';
677    if (!l_toplex || blklevel == 0)
678	if (expmatch(s, l_prcbeg, pname) != NULL) {
679	    return true;
680	}
681    return false;
682}
683
684
685/*  iskw -	check to see if the next word is a keyword
686 */
687
688static int
689iskw(char *s)
690{
691	char **ss = l_keywds;
692	int i = 1;
693	char *cp = s;
694
695	while (++cp, isidchr((unsigned char)*cp))
696		i++;
697	while ((cp = *ss++) != NULL)
698		if (!STRNCMP(s,cp,i) && !isidchr((unsigned char)cp[i]))
699			return i;
700	return 0;
701}
702