1/*	$NetBSD: vfontedpr.c,v 1.12 2004/04/23 22:14:57 christos 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#include <sys/cdefs.h>
33#ifndef lint
34__COPYRIGHT("@(#) Copyright (c) 1980, 1993\
35 The Regents of the University of California.  All rights reserved.");
36#endif /* not lint */
37
38#ifndef lint
39#if 0
40static char sccsid[] = "@(#)vfontedpr.c	8.1 (Berkeley) 6/6/93";
41#endif
42__RCSID("$NetBSD: vfontedpr.c,v 1.12 2004/04/23 22:14:57 christos Exp $");
43#endif /* not lint */
44
45#include <sys/types.h>
46#include <sys/stat.h>
47#include <time.h>
48#include <ctype.h>
49#include <stdlib.h>
50#include <string.h>
51#include <stdio.h>
52#include "pathnames.h"
53#include "extern.h"
54
55#define FALSE 0
56#define TRUE !(FALSE)
57#define NIL 0
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
72static int       iskw __P((char *));
73static boolean   isproc __P((char *));
74static void      putKcp __P((char *, char *, boolean));
75static void      putScp __P((char *));
76static void      putcp __P((int));
77static int       tabs __P((char *, char *));
78static int       width __P((char *, char *));
79
80/*
81 *	The state variables
82 */
83
84static boolean  filter = FALSE;	/* act as a filter (like eqn) */
85static boolean	inchr;		/* in a string constant */
86static boolean	incomm;		/* in a comment of the primary type */
87static boolean	idx = FALSE;	/* form an index */
88static boolean	instr;		/* in a string constant */
89static boolean	nokeyw = FALSE;	/* no keywords being flagged */
90static boolean  pass = FALSE;	/*
91				 * when acting as a filter, pass indicates
92				 * whether we are currently processing
93				 * input.
94				 */
95
96static int	blklevel;	/* current nesting level */
97static int	comtype;	/* type of comment */
98static const char *defsfile[2] = { _PATH_VGRINDEFS, 0 };
99				/* name of language definitions file */
100static int	margin;
101static int	plstack[PSMAX];	/* the procedure nesting level stack */
102static char	pname[BUFSIZ+1];
103static boolean  prccont;	/* continue last procedure */
104static int	psptr;		/* the stack index of the current procedure */
105static char	pstack[PSMAX][PNAMELEN+1];	/* the procedure name stack */
106
107/*
108 *	The language specific globals
109 */
110
111char	*l_acmbeg;		/* string introducing a comment */
112char	*l_acmend;		/* string ending a comment */
113char	*l_blkbeg;		/* string begining of a block */
114char	*l_blkend;		/* string ending a block */
115char    *l_chrbeg;		/* delimiter for character constant */
116char    *l_chrend;		/* delimiter for character constant */
117char	*l_combeg;		/* string introducing a comment */
118char	*l_comend;		/* string ending a comment */
119char	 l_escape;		/* character used to  escape characters */
120char	*l_keywds[BUFSIZ/2];	/* keyword table address */
121char	*l_prcbeg;		/* regular expr for procedure begin */
122char    *l_strbeg;		/* delimiter for string constant */
123char    *l_strend;		/* delimiter for string constant */
124boolean	 l_toplex;		/* procedures only defined at top lex level */
125const char *language = "c";	/* the language indicator */
126
127int	main __P((int, char **));
128
129#define	ps(x)	printf("%s", x)
130static char minus[] = "-";
131static char minusn[] = "-n";
132
133int
134main(argc, argv)
135    int argc;
136    char *argv[];
137{
138    const char *fname = "";
139    struct stat stbuf;
140    char buf[BUFSIZ];
141    char *defs;
142    int needbp = 0;
143
144    argc--, argv++;
145    do {
146	char *cp;
147	int i;
148
149	if (argc > 0) {
150	    if (!strcmp(argv[0], "-h")) {
151		if (argc == 1) {
152		    printf("'ds =H\n");
153		    argc = 0;
154		    goto rest;
155		}
156		printf("'ds =H %s\n", argv[1]);
157		argc--, argv++;
158		argc--, argv++;
159		if (argc > 0)
160		    continue;
161		goto rest;
162	    }
163
164	    /* act as a filter like eqn */
165	    if (!strcmp(argv[0], "-f")) {
166		filter++;
167		argv[0] = argv[argc-1];
168		argv[argc-1] = minus;
169		continue;
170	    }
171
172	    /* take input from the standard place */
173	    if (!strcmp(argv[0], "-")) {
174		argc = 0;
175		goto rest;
176	    }
177
178	    /* build an index */
179	    if (!strcmp(argv[0], "-x")) {
180		idx++;
181		argv[0] = minusn;
182	    }
183
184	    /* indicate no keywords */
185	    if (!strcmp(argv[0], "-n")) {
186		nokeyw++;
187		argc--, argv++;
188		continue;
189	    }
190
191	    /* specify the font size */
192	    if (!strncmp(argv[0], "-s", 2)) {
193		i = 0;
194		cp = argv[0] + 2;
195		while (*cp)
196		    i = i * 10 + (*cp++ - '0');
197		printf("'ps %d\n'vs %d\n", i, i+1);
198		argc--, argv++;
199		continue;
200	    }
201
202	    /* specify the language */
203	    if (!strncmp(argv[0], "-l", 2)) {
204		language = argv[0]+2;
205		argc--, argv++;
206		continue;
207	    }
208
209	    /* specify the language description file */
210	    if (!strncmp(argv[0], "-d", 2)) {
211		defsfile[0] = argv[1];
212		argc--, argv++;
213		argc--, argv++;
214		continue;
215	    }
216
217	    /* open the file for input */
218	    if (freopen(argv[0], "r", stdin) == NULL) {
219		perror(argv[0]);
220		exit(1);
221	    }
222	    if (idx)
223		printf("'ta 4i 4.25i 5.5iR\n'in .5i\n");
224	    fname = argv[0];
225	    argc--, argv++;
226	}
227    rest:
228
229	/*
230	 *  get the  language definition from the defs file
231	 */
232	i = cgetent(&defs, defsfile, language);
233	if (i == -1) {
234	    fprintf (stderr, "no entry for language %s\n", language);
235	    exit(0);
236	} else  if (i == -2) { fprintf(stderr,
237	    "cannot find vgrindefs file %s\n", defsfile[0]);
238	    exit(0);
239	} else if (i == -3) { fprintf(stderr,
240	    "potential reference loop detected in vgrindefs file %s\n",
241            defsfile[0]);
242	    exit(0);
243	}
244	if (cgetustr(defs, "kw", &cp) == -1)
245	    nokeyw = TRUE;
246	else  {
247	    char **cpp;
248
249	    cpp = l_keywds;
250	    while (*cp) {
251		while (*cp == ' ' || *cp =='\t')
252		    *cp++ = '\0';
253		if (*cp)
254		    *cpp++ = cp;
255		while (*cp != ' ' && *cp  != '\t' && *cp)
256		    cp++;
257	    }
258	    *cpp = NIL;
259	}
260	cgetustr(defs, "pb", &cp);
261	l_prcbeg = convexp(cp);
262	cgetustr(defs, "cb", &cp);
263	l_combeg = convexp(cp);
264	cgetustr(defs, "ce", &cp);
265	l_comend = convexp(cp);
266	cgetustr(defs, "ab", &cp);
267	l_acmbeg = convexp(cp);
268	cgetustr(defs, "ae", &cp);
269	l_acmend = convexp(cp);
270	cgetustr(defs, "sb", &cp);
271	l_strbeg = convexp(cp);
272	cgetustr(defs, "se", &cp);
273	l_strend = convexp(cp);
274	cgetustr(defs, "bb", &cp);
275	l_blkbeg = convexp(cp);
276	cgetustr(defs, "be", &cp);
277	l_blkend = convexp(cp);
278	cgetustr(defs, "lb", &cp);
279	l_chrbeg = convexp(cp);
280	cgetustr(defs, "le", &cp);
281	l_chrend = convexp(cp);
282	l_escape = '\\';
283	l_onecase = (cgetcap(defs, "oc", ':') != NULL);
284	l_toplex = (cgetcap(defs, "tl", ':') != NULL);
285
286	/* initialize the program */
287
288	incomm = FALSE;
289	instr = FALSE;
290	inchr = FALSE;
291	x_escaped = FALSE;
292	blklevel = 0;
293	for (psptr=0; psptr<PSMAX; psptr++) {
294	    pstack[psptr][0] = '\0';
295	    plstack[psptr] = 0;
296	}
297	psptr = -1;
298	ps("'-F\n");
299	if (!filter) {
300	    printf(".ds =F %s\n", fname);
301	    ps("'wh 0 vH\n");
302	    ps("'wh -1i vF\n");
303	}
304	if (needbp) {
305	    needbp = 0;
306	    printf(".()\n");
307	    printf(".bp\n");
308	}
309	if (!filter) {
310	    fstat(fileno(stdin), &stbuf);
311	    cp = ctime(&stbuf.st_mtime);
312	    cp[16] = '\0';
313	    cp[24] = '\0';
314	    printf(".ds =M %s %s\n", cp+4, cp+20);
315	}
316
317	/*
318	 *	MAIN LOOP!!!
319	 */
320	while (fgets(buf, sizeof buf, stdin) != NULL) {
321	    if (buf[0] == '\f') {
322		printf(".bp\n");
323	    }
324	    if (buf[0] == '.') {
325		printf("%s", buf);
326		if (!strncmp (buf+1, "vS", 2))
327		    pass = TRUE;
328		if (!strncmp (buf+1, "vE", 2))
329		    pass = FALSE;
330		continue;
331	    }
332	    prccont = FALSE;
333	    if (!filter || pass)
334		putScp(buf);
335	    else
336		printf("%s", buf);
337	    if (prccont && (psptr >= 0)) {
338		ps("'FC ");
339		ps(pstack[psptr]);
340		ps("\n");
341	    }
342#ifdef DEBUG
343	    printf ("com %o str %o chr %o ptr %d\n", incomm, instr, inchr, psptr);
344#endif
345	    margin = 0;
346	}
347	needbp = 1;
348    } while (argc > 0);
349    exit(0);
350}
351
352#define isidchr(c) (isalnum((unsigned char)(c)) || (c) == '_')
353
354static void
355putScp(os)
356    char *os;
357{
358    char *s = os;			/* pointer to unmatched string */
359    char dummy[BUFSIZ];			/* dummy to be used by expmatch */
360    char *comptr;			/* end of a comment delimiter */
361    char *acmptr;			/* end of a comment delimiter */
362    char *strptr;			/* end of a string delimiter */
363    char *chrptr;			/* end of a character const delimiter */
364    char *blksptr;			/* end of a lexical block start */
365    char *blkeptr;			/* end of a lexical block end */
366
367    x_start = os;			/* remember the start for expmatch */
368    x_escaped = FALSE;
369    if (nokeyw || incomm || instr)
370	goto skip;
371    if (isproc(s)) {
372	ps("'FN ");
373	ps(pname);
374        ps("\n");
375	if (psptr < PSMAX) {
376	    ++psptr;
377	    strlcpy(pstack[psptr], pname, sizeof(pstack[psptr]));
378	    plstack[psptr] = blklevel;
379	}
380    }
381skip:
382    do {
383	/* check for string, comment, blockstart, etc */
384	if (!incomm && !instr && !inchr) {
385
386	    blkeptr = expmatch(s, l_blkend, dummy);
387	    blksptr = expmatch(s, l_blkbeg, dummy);
388	    comptr = expmatch(s, l_combeg, dummy);
389	    acmptr = expmatch(s, l_acmbeg, dummy);
390	    strptr = expmatch(s, l_strbeg, dummy);
391	    chrptr = expmatch(s, l_chrbeg, dummy);
392
393	    /* start of a comment? */
394	    if (comptr != NIL)
395		if ((comptr < strptr || strptr == NIL)
396		  && (comptr < acmptr || acmptr == NIL)
397		  && (comptr < chrptr || chrptr == NIL)
398		  && (comptr < blksptr || blksptr == NIL)
399		  && (comptr < blkeptr || blkeptr == NIL)) {
400		    putKcp(s, comptr-1, FALSE);
401		    s = comptr;
402		    incomm = TRUE;
403		    comtype = STANDARD;
404		    if (s != os)
405			ps("\\c");
406		    ps("\\c\n'+C\n");
407		    continue;
408		}
409
410	    /* start of a comment? */
411	    if (acmptr != NIL)
412		if ((acmptr < strptr || strptr == NIL)
413		  && (acmptr < chrptr || chrptr == NIL)
414		  && (acmptr < blksptr || blksptr == NIL)
415		  && (acmptr < blkeptr || blkeptr == NIL)) {
416		    putKcp(s, acmptr-1, FALSE);
417		    s = acmptr;
418		    incomm = TRUE;
419		    comtype = ALTERNATE;
420		    if (s != os)
421			ps("\\c");
422		    ps("\\c\n'+C\n");
423		    continue;
424		}
425
426	    /* start of a string? */
427	    if (strptr != NIL)
428		if ((strptr < chrptr || chrptr == NIL)
429		  && (strptr < blksptr || blksptr == NIL)
430		  && (strptr < blkeptr || blkeptr == NIL)) {
431		    putKcp(s, strptr-1, FALSE);
432		    s = strptr;
433		    instr = TRUE;
434		    continue;
435		}
436
437	    /* start of a character string? */
438	    if (chrptr != NIL)
439		if ((chrptr < blksptr || blksptr == NIL)
440		  && (chrptr < blkeptr || blkeptr == NIL)) {
441		    putKcp(s, chrptr-1, FALSE);
442		    s = chrptr;
443		    inchr = TRUE;
444		    continue;
445		}
446
447	    /* end of a lexical block */
448	    if (blkeptr != NIL) {
449		if (blkeptr < blksptr || blksptr == NIL) {
450		    putKcp(s, blkeptr - 1, FALSE);
451		    s = blkeptr;
452		    blklevel--;
453		    if (psptr >= 0 && plstack[psptr] >= blklevel) {
454
455			/* end of current procedure */
456			if (s != os)
457			    ps("\\c");
458			ps("\\c\n'-F\n");
459			blklevel = plstack[psptr];
460
461			/* see if we should print the last proc name */
462			if (--psptr >= 0)
463			    prccont = TRUE;
464			else
465			    psptr = -1;
466		    }
467		    continue;
468		}
469	    }
470
471	    /* start of a lexical block */
472	    if (blksptr != NIL) {
473		putKcp(s, blksptr - 1, FALSE);
474		s = blksptr;
475		blklevel++;
476		continue;
477	    }
478
479	/* check for end of comment */
480	} else if (incomm) {
481	    comptr = expmatch(s, l_comend, dummy);
482	    acmptr = expmatch(s, l_acmend, dummy);
483	    if (((comtype == STANDARD) && (comptr != NIL)) ||
484	        ((comtype == ALTERNATE) && (acmptr != NIL))) {
485		if (comtype == STANDARD) {
486		    putKcp(s, comptr-1, TRUE);
487		    s = comptr;
488		} else {
489		    putKcp(s, acmptr-1, TRUE);
490		    s = acmptr;
491		}
492		incomm = FALSE;
493		ps("\\c\n'-C\n");
494		continue;
495	    } else {
496		putKcp(s, s + strlen(s) -1, TRUE);
497		s = s + strlen(s);
498		continue;
499	    }
500
501	/* check for end of string */
502	} else if (instr) {
503	    if ((strptr = expmatch(s, l_strend, dummy)) != NIL) {
504		putKcp(s, strptr-1, TRUE);
505		s = strptr;
506		instr = FALSE;
507		continue;
508	    } else {
509		putKcp(s, s+strlen(s)-1, TRUE);
510		s = s + strlen(s);
511		continue;
512	    }
513
514	/* check for end of character string */
515	} else if (inchr) {
516	    if ((chrptr = expmatch(s, l_chrend, dummy)) != NIL) {
517		putKcp(s, chrptr-1, TRUE);
518		s = chrptr;
519		inchr = FALSE;
520		continue;
521	    } else {
522		putKcp(s, s+strlen(s)-1, TRUE);
523		s = s + strlen(s);
524		continue;
525	    }
526	}
527
528	/* print out the line */
529	putKcp(s, s + strlen(s) -1, FALSE);
530	s = s + strlen(s);
531    } while (*s);
532}
533
534static void
535putKcp(start, end, force)
536    char	*start;		/* start of string to write */
537    char	*end;		/* end of string to write */
538    boolean	force;		/* true if we should force nokeyw */
539{
540    int i;
541    int xfld = 0;
542
543    while (start <= end) {
544	if (idx) {
545	    if (*start == ' ' || *start == '\t') {
546		if (xfld == 0)
547		    printf("");
548		printf("\t");
549		xfld = 1;
550		while (*start == ' ' || *start == '\t')
551		    start++;
552		continue;
553	    }
554	}
555
556	/* take care of nice tab stops */
557	if (*start == '\t') {
558	    while (*start == '\t')
559		start++;
560	    i = tabs(x_start, start) - margin / 8;
561	    printf("\\h'|%dn'", i * 10 + 1 - margin % 8);
562	    continue;
563	}
564
565	if (!nokeyw && !force)
566	    if ((*start == '#' || isidchr(*start))
567	    && (start == x_start || !isidchr(start[-1]))) {
568		i = iskw(start);
569		if (i > 0) {
570		    ps("\\*(+K");
571		    do
572			putcp(*start++);
573		    while (--i > 0);
574		    ps("\\*(-K");
575		    continue;
576		}
577	    }
578
579	putcp(*start++);
580    }
581}
582
583
584static int
585tabs(s, os)
586    char *s, *os;
587{
588
589    return (width(s, os) / 8);
590}
591
592static int
593width(s, os)
594	char *s, *os;
595{
596	int i = 0;
597
598	while (s < os) {
599		if (*s == '\t') {
600			i = (i + 8) &~ 7;
601			s++;
602			continue;
603		}
604		if (*s < ' ')
605			i += 2;
606		else
607			i++;
608		s++;
609	}
610	return (i);
611}
612
613static void
614putcp(c)
615	int c;
616{
617
618	switch(c) {
619
620	case 0:
621		break;
622
623	case '\f':
624		break;
625
626	case '{':
627		ps("\\*(+K{\\*(-K");
628		break;
629
630	case '}':
631		ps("\\*(+K}\\*(-K");
632		break;
633
634	case '\\':
635		ps("\\e");
636		break;
637
638	case '_':
639		ps("\\*_");
640		break;
641
642	case '-':
643		ps("\\*-");
644		break;
645
646	case '`':
647		ps("\\`");
648		break;
649
650	case '\'':
651		ps("\\'");
652		break;
653
654	case '.':
655		ps("\\&.");
656		break;
657
658	case '*':
659		ps("\\fI*\\fP");
660		break;
661
662	case '/':
663		ps("\\fI\\h'\\w' 'u-\\w'/'u'/\\fP");
664		break;
665
666	default:
667		if (c < 040)
668			putchar('^'), c |= '@';
669	case '\t':
670	case '\n':
671		putchar(c);
672	}
673}
674
675/*
676 *	look for a process beginning on this line
677 */
678static boolean
679isproc(s)
680    char *s;
681{
682    pname[0] = '\0';
683    if (!l_toplex || blklevel == 0)
684	if (expmatch(s, l_prcbeg, pname) != NIL) {
685	    return (TRUE);
686	}
687    return (FALSE);
688}
689
690
691/*  iskw -	check to see if the next word is a keyword
692 */
693
694static int
695iskw(s)
696	char *s;
697{
698	char **ss = l_keywds;
699	int i = 1;
700	char *cp = s;
701
702	while (++cp, isidchr((unsigned char)*cp))
703		i++;
704	while ((cp = *ss++) != NULL)
705		if (!STRNCMP(s,cp,i) && !isidchr((unsigned char)cp[i]))
706			return (i);
707	return (0);
708}
709
710