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/usr.bin/vgrind/vfontedpr.c

https://bitbucket.org/freebsd/freebsd-head/
C | 723 lines | 562 code | 80 blank | 81 comment | 206 complexity | 1b4f5fefa80dd255f902ea74bfd4014e MD5 | raw file
  1/*
  2 * Copyright (c) 1980, 1993
  3 *	The Regents of the University of California.  All rights reserved.
  4 *
  5 * Redistribution and use in source and binary forms, with or without
  6 * modification, are permitted provided that the following conditions
  7 * are met:
  8 * 1. Redistributions of source code must retain the above copyright
  9 *    notice, this list of conditions and the following disclaimer.
 10 * 2. Redistributions in binary form must reproduce the above copyright
 11 *    notice, this list of conditions and the following disclaimer in the
 12 *    documentation and/or other materials provided with the distribution.
 13 * 4. Neither the name of the University nor the names of its contributors
 14 *    may be used to endorse or promote products derived from this software
 15 *    without specific prior written permission.
 16 *
 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 27 * SUCH DAMAGE.
 28 */
 29
 30#include <sys/cdefs.h>
 31
 32__FBSDID("$FreeBSD$");
 33
 34#ifndef lint
 35static const char copyright[] =
 36"@(#) Copyright (c) 1980, 1993\n\
 37	The Regents of the University of California.  All rights reserved.\n";
 38#endif
 39
 40#ifndef lint
 41static const char sccsid[] = "@(#)vfontedpr.c	8.1 (Berkeley) 6/6/93";
 42#endif
 43
 44#include <sys/types.h>
 45#include <sys/stat.h>
 46#include <ctype.h>
 47#include <err.h>
 48#include <stdio.h>
 49#include <stdlib.h>
 50#include <string.h>
 51#include <time.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(char *);
 73static boolean   isproc(char *);
 74static void      putKcp(char *, char *, boolean);
 75static void      putScp(char *);
 76static void      putcp(int);
 77static int       tabs(char *, char *);
 78static int       width(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 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 beginning 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_nocom;		/* regexp for non-comments */
122char	*l_prcbeg;		/* regular expr for procedure begin */
123char    *l_strbeg;		/* delimiter for string constant */
124char    *l_strend;		/* delimiter for string constant */
125boolean	 l_toplex;		/* procedures only defined at top lex level */
126const char *language = "c";	/* the language indicator */
127
128#define	ps(x)	printf("%s", x)
129
130int
131main(argc, argv)
132    int argc;
133    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++;
164		argv[0] = argv[argc-1];
165		argv[argc-1] = strdup("-");
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++;
178		argv[0] = strdup("-n");
179	    }
180
181	    /* indicate no keywords */
182	    if (!strcmp(argv[0], "-n")) {
183		nokeyw++;
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 = NIL;
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
351static void
352putScp(os)
353    char *os;
354{
355    register 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    char *nocomptr;			/* end of a non-comment delimiter */
364
365    s_start = os;			/* remember the start for expmatch */
366    _escaped = FALSE;
367    if (nokeyw || incomm || instr)
368	goto skip;
369    if (isproc(s)) {
370	ps("'FN ");
371	ps(pname);
372        ps("\n");
373	if (psptr < PSMAX) {
374	    ++psptr;
375	    strncpy (pstack[psptr], pname, PNAMELEN);
376	    pstack[psptr][PNAMELEN] = '\0';
377	    plstack[psptr] = blklevel;
378	}
379    }
380skip:
381    do {
382	/* check for string, comment, blockstart, etc */
383	if (!incomm && !instr && !inchr) {
384
385	    blkeptr = expmatch (s, l_blkend, dummy);
386	    blksptr = expmatch (s, l_blkbeg, dummy);
387	    comptr = expmatch (s, l_combeg, dummy);
388	    acmptr = expmatch (s, l_acmbeg, dummy);
389	    strptr = expmatch (s, l_strbeg, dummy);
390	    chrptr = expmatch (s, l_chrbeg, dummy);
391	    nocomptr = expmatch (s, l_nocom, dummy);
392
393	    /* start of non-comment? */
394	    if (nocomptr != NIL)
395		if ((nocomptr <= comptr || comptr == NIL)
396		  && (nocomptr <= acmptr || acmptr == NIL)) {
397		    /* continue after non-comment */
398		    putKcp (s, nocomptr-1, FALSE);
399		    s = nocomptr;
400		    continue;
401		}
402
403	    /* start of a comment? */
404	    if (comptr != NIL)
405		if ((comptr < strptr || strptr == NIL)
406		  && (comptr < acmptr || acmptr == NIL)
407		  && (comptr < chrptr || chrptr == NIL)
408		  && (comptr < blksptr || blksptr == NIL)
409		  && (comptr < blkeptr || blkeptr == NIL)) {
410		    putKcp (s, comptr-1, FALSE);
411		    s = comptr;
412		    incomm = TRUE;
413		    comtype = STANDARD;
414		    if (s != os)
415			ps ("\\c");
416		    ps ("\\c\n'+C\n");
417		    continue;
418		}
419
420	    /* start of a comment? */
421	    if (acmptr != NIL)
422		if ((acmptr < strptr || strptr == NIL)
423		  && (acmptr < chrptr || chrptr == NIL)
424		  && (acmptr < blksptr || blksptr == NIL)
425		  && (acmptr < blkeptr || blkeptr == NIL)) {
426		    putKcp (s, acmptr-1, FALSE);
427		    s = acmptr;
428		    incomm = TRUE;
429		    comtype = ALTERNATE;
430		    if (s != os)
431			ps ("\\c");
432		    ps ("\\c\n'+C\n");
433		    continue;
434		}
435
436	    /* start of a string? */
437	    if (strptr != NIL)
438		if ((strptr < chrptr || chrptr == NIL)
439		  && (strptr < blksptr || blksptr == NIL)
440		  && (strptr < blkeptr || blkeptr == NIL)) {
441		    putKcp (s, strptr-1, FALSE);
442		    s = strptr;
443		    instr = TRUE;
444		    continue;
445		}
446
447	    /* start of a character string? */
448	    if (chrptr != NIL)
449		if ((chrptr < blksptr || blksptr == NIL)
450		  && (chrptr < blkeptr || blkeptr == NIL)) {
451		    putKcp (s, chrptr-1, FALSE);
452		    s = chrptr;
453		    inchr = TRUE;
454		    continue;
455		}
456
457	    /* end of a lexical block */
458	    if (blkeptr != NIL) {
459		if (blkeptr < blksptr || blksptr == NIL) {
460		    putKcp (s, blkeptr - 1, FALSE);
461		    s = blkeptr;
462		    if (blklevel > 0 /* sanity */)
463			    blklevel--;
464		    if (psptr >= 0 && plstack[psptr] >= blklevel) {
465
466			/* end of current procedure */
467			if (s != os)
468			    ps ("\\c");
469			ps ("\\c\n'-F\n");
470			blklevel = plstack[psptr];
471
472			/* see if we should print the last proc name */
473			if (--psptr >= 0)
474			    prccont = TRUE;
475			else
476			    psptr = -1;
477		    }
478		    continue;
479		}
480	    }
481
482	    /* start of a lexical block */
483	    if (blksptr != NIL) {
484		putKcp (s, blksptr - 1, FALSE);
485		s = blksptr;
486		blklevel++;
487		continue;
488	    }
489
490	/* check for end of comment */
491	} else if (incomm) {
492	    comptr = expmatch (s, l_comend, dummy);
493	    acmptr = expmatch (s, l_acmend, dummy);
494	    if (((comtype == STANDARD) && (comptr != NIL)) ||
495	        ((comtype == ALTERNATE) && (acmptr != NIL))) {
496		if (comtype == STANDARD) {
497		    putKcp (s, comptr-1, TRUE);
498		    s = comptr;
499		} else {
500		    putKcp (s, acmptr-1, TRUE);
501		    s = acmptr;
502		}
503		incomm = FALSE;
504		ps("\\c\n'-C\n");
505		continue;
506	    } else {
507		putKcp (s, s + strlen(s) -1, TRUE);
508		s = s + strlen(s);
509		continue;
510	    }
511
512	/* check for end of string */
513	} else if (instr) {
514	    if ((strptr = expmatch (s, l_strend, dummy)) != NIL) {
515		putKcp (s, strptr-1, TRUE);
516		s = strptr;
517		instr = FALSE;
518		continue;
519	    } else {
520		putKcp (s, s+strlen(s)-1, TRUE);
521		s = s + strlen(s);
522		continue;
523	    }
524
525	/* check for end of character string */
526	} else if (inchr) {
527	    if ((chrptr = expmatch (s, l_chrend, dummy)) != NIL) {
528		putKcp (s, chrptr-1, TRUE);
529		s = chrptr;
530		inchr = FALSE;
531		continue;
532	    } else {
533		putKcp (s, s+strlen(s)-1, TRUE);
534		s = s + strlen(s);
535		continue;
536	    }
537	}
538
539	/* print out the line */
540	putKcp (s, s + strlen(s) -1, FALSE);
541	s = s + strlen(s);
542    } while (*s);
543}
544
545static void
546putKcp (start, end, force)
547    char	*start;		/* start of string to write */
548    char	*end;		/* end of string to write */
549    boolean	force;		/* true if we should force nokeyw */
550{
551    int i;
552    int xfld = 0;
553
554    while (start <= end) {
555	if (idx) {
556	    if (*start == ' ' || *start == '\t') {
557		if (xfld == 0)
558		    printf("\001");
559		printf("\t");
560		xfld = 1;
561		while (*start == ' ' || *start == '\t')
562		    start++;
563		continue;
564	    }
565	}
566
567	/* take care of nice tab stops */
568	if (*start == '\t') {
569	    while (*start == '\t')
570		start++;
571	    i = tabs(s_start, start) - margin / 8;
572	    printf("\\h'|%dn'", i * 10 + 1 - margin % 8);
573	    continue;
574	}
575
576	if (!nokeyw && !force)
577	    if ((*start == '#' || isidchr(*start))
578	    && (start == s_start || !isidchr(start[-1]))) {
579		i = iskw(start);
580		if (i > 0) {
581		    ps("\\*(+K");
582		    do
583			putcp((unsigned char)*start++);
584		    while (--i > 0);
585		    ps("\\*(-K");
586		    continue;
587		}
588	    }
589
590	putcp ((unsigned char)*start++);
591    }
592}
593
594
595static int
596tabs(s, os)
597    char *s, *os;
598{
599
600    return (width(s, os) / 8);
601}
602
603static int
604width(s, os)
605	register char *s, *os;
606{
607	register int i = 0;
608
609	while (s < os) {
610		if (*s == '\t') {
611			i = (i + 8) &~ 7;
612			s++;
613			continue;
614		}
615		if (*s < ' ')
616			i += 2;
617		else
618			i++;
619		s++;
620	}
621	return (i);
622}
623
624static void
625putcp(c)
626	register int c;
627{
628
629	switch(c) {
630
631	case 0:
632		break;
633
634	case '\f':
635		break;
636
637	case '\r':
638		break;
639
640	case '{':
641		ps("\\*(+K{\\*(-K");
642		break;
643
644	case '}':
645		ps("\\*(+K}\\*(-K");
646		break;
647
648	case '\\':
649		ps("\\e");
650		break;
651
652	case '_':
653		ps("\\*_");
654		break;
655
656	case '-':
657		ps("\\*-");
658		break;
659
660	case '`':
661		ps("\\`");
662		break;
663
664	case '\'':
665		ps("\\'");
666		break;
667
668	case '.':
669		ps("\\&.");
670		break;
671
672	case '*':
673		ps("\\fI*\\fP");
674		break;
675
676	case '/':
677		ps("\\fI\\h'\\w' 'u-\\w'/'u'/\\fP");
678		break;
679
680	default:
681		if (c < 040)
682			putchar('^'), c |= '@';
683	case '\t':
684	case '\n':
685		putchar(c);
686	}
687}
688
689/*
690 *	look for a process beginning on this line
691 */
692static boolean
693isproc(s)
694    char *s;
695{
696    pname[0] = '\0';
697    if (!l_toplex || blklevel == 0)
698	if (expmatch (s, l_prcbeg, pname) != NIL) {
699	    return (TRUE);
700	}
701    return (FALSE);
702}
703
704
705/*  iskw -	check to see if the next word is a keyword
706 */
707
708static int
709iskw(s)
710	register char *s;
711{
712	register char **ss = l_keywds;
713	register int i = 1;
714	register char *cp = s;
715
716	while (++cp, isidchr(*cp))
717		i++;
718	while ((cp = *ss++))
719		if (!STRNCMP(s,cp,i) && !isidchr(cp[i]))
720			return (i);
721	return (0);
722}
723