vfontedpr.c revision e5af7cce311c40ac0c6cf3c9d3e81b3f0a9c7c3a
1/*
2 * Copyright (c) 1980 Regents of the University of California.
3 * All rights reserved.  The Berkeley software License Agreement
4 * specifies the terms and conditions for redistribution.
5 */
6
7#pragma ident	"%Z%%M%	%I%	%E% SMI"
8
9#include <ctype.h>
10#include <stdio.h>
11#include <sys/types.h>
12#include <sys/stat.h>
13#include <locale.h>
14#include <euc.h>
15#include <stdlib.h>
16
17#define boolean int
18#define TRUE 1
19#define FALSE 0
20#define NIL 0
21#define STANDARD 0
22#define ALTERNATE 1
23
24/*
25 * Vfontedpr.
26 *
27 * Dave Presotto 1/12/81 (adapted from an earlier version by Bill Joy)
28 *
29 */
30
31#define STRLEN 10		/* length of strings introducing things */
32#define PNAMELEN 40		/* length of a function/procedure name */
33#define PSMAX 20		/* size of procedure name stacking */
34
35/* regular expression routines */
36
37char	*expmatch();		/* match a string to an expression */
38char	*STRNCMP();		/* a different kind of strncmp */
39char	*convexp();		/* convert expression to internal form */
40
41char	*tgetstr();		/* extract a string-valued capability */
42boolean	isproc();
43char	*ctime();
44char	*strchr();
45
46/*
47 *	The state variables
48 */
49
50boolean	incomm;			/* in a comment of the primary type */
51boolean	instr;			/* in a string constant */
52boolean	inchr;			/* in a string constant */
53boolean	nokeyw = FALSE;		/* no keywords being flagged */
54boolean	doindex = FALSE;	/* form an index */
55boolean twocol = FALSE;		/* in two-column mode */
56boolean	filter = FALSE;		/* act as a filter (like eqn) */
57boolean	pass = FALSE;		/* when acting as a filter, pass indicates
58				 * whether we are currently processing
59				 * input.
60				 */
61boolean	prccont;		/* continue last procedure */
62int	comtype;		/* type of comment */
63int	margin;
64int	psptr;			/* the stack index of the current procedure */
65char	pstack[PSMAX][PNAMELEN+1];	/* the procedure name stack */
66int	plstack[PSMAX];		/* the procedure nesting level stack */
67int	blklevel;		/* current nesting level */
68int	prclevel;		/* nesting level at which procedure definitions
69				   may be found, -1 if none currently valid
70				   (meaningful only if l_prclevel is true) */
71char	*defsfile = "/usr/lib/vgrindefs";	/* name of language definitions file */
72char	pname[BUFSIZ+1];
73
74/*
75 *	The language specific globals
76 */
77
78char	*language = "c";	/* the language indicator */
79char	*l_keywds[BUFSIZ/2];	/* keyword table address */
80char	*l_prcbeg;		/* regular expr for procedure begin */
81char	*l_combeg;		/* string introducing a comment */
82char	*l_comend;		/* string ending a comment */
83char	*l_acmbeg;		/* string introducing a comment */
84char	*l_acmend;		/* string ending a comment */
85char	*l_blkbeg;		/* string begining of a block */
86char	*l_blkend;		/* string ending a block */
87char	*l_strbeg;		/* delimiter for string constant */
88char	*l_strend;		/* delimiter for string constant */
89char	*l_chrbeg;		/* delimiter for character constant */
90char	*l_chrend;		/* delimiter for character constant */
91char	*l_prcenable;		/* re indicating that procedure definitions
92				   can be found in the next lexical level --
93				   kludge for lisp-like languages that use
94				   something like
95					   (defun (proc ...)
96					  	(proc ...)
97					   )
98				   to define procedures */
99char	l_escape;		/* character used to  escape characters */
100boolean	l_toplex;		/* procedures only defined at top lex level */
101boolean l_prclevel;		/* procedure definitions valid only within
102				   the nesting level indicated by the px
103				   (l_prcenable) capability */
104
105/*
106 *  for the benefit of die-hards who aren't convinced that tabs
107 *  occur every eight columns
108 */
109short tabsize = 8;
110
111/*
112 *  global variables also used by expmatch
113 */
114boolean	_escaped;		/* if last character was an escape */
115char	*Start;			/* start of the current string */
116boolean	l_onecase;		/* upper and lower case are equivalent */
117char	*l_idchars;		/* characters legal in identifiers in addition
118				   to letters and digits (default "_") */
119
120static void putcp(int c);
121static int width(char *s, char *os);
122static int tabs(char *s, char *os);
123static void putKcp(char *start, char *end, boolean force);
124static void putScp(char *os);
125static int iskw(char *s);
126
127/*
128 * The code below emits troff macros and directives that consume part of the
129 * troff macro and register space.  See tmac.vgrind for an enumeration of
130 * these macros and registers.
131 */
132
133int
134main(int argc, char *argv[])
135{
136    FILE *in;
137    char *fname;
138    struct stat stbuf;
139    char buf[BUFSIZ];
140    char idbuf[256];	/* enough for all 8 bit chars */
141    char strings[2 * BUFSIZ];
142    char defs[2 * BUFSIZ];
143    int needbp = 0;
144    int i;
145    char *cp;
146
147	(void) setlocale(LC_ALL, "");
148#if !defined(TEXT_DOMAIN)
149#define	TEXT_DOMAIN	"SYS_TEST"
150#endif
151	(void) textdomain(TEXT_DOMAIN);
152
153    /*
154     * Dump the name by which we were invoked.
155     */
156    argc--, argv++;
157
158    /*
159     * Process arguments.  For the sake of compatibility with older versions
160     * of the program, the syntax accepted below is very idiosyncratic.  Some
161     * options require space between the option and its argument; others
162     * disallow it.  No options may be bundled together.
163     *
164     * Actually, there is one incompatibility.  Files and options formerly
165     * could be arbitrarily intermixed, but this is no longer allowed.  (This
166     * possiblity was never documented.)
167     */
168    while (argc > 0 && *argv[0] == '-') {
169	switch (*(cp = argv[0] + 1)) {
170
171	case '\0':				/* - */
172	    /* Take input from stdin. */
173	    /*
174	     * This option implies the end of the flag arguments.  Leave the
175	     * "-" in place for the file processing code to see.
176	     */
177	    goto flagsdone;
178
179	case '2':				/* -2 */
180	    /* Enter two column mode. */
181	    twocol = 1;
182	    printf("'nr =2 1\n");
183	    break;
184
185	case 'd':				/* -d <defs-file> */
186	    /* Specify the language description file. */
187	    defsfile = argv[1];
188	    argc--, argv++;
189	    break;
190
191	case 'f':				/* -f */
192	    /* Act as a filter like eqn. */
193	    filter = 1;
194	    /*
195	     * Slide remaining arguments down one position and postpend "-",
196	     * to force reading from stdin.
197	     */
198	    for (i = 0; i < argc - 1; i++)
199		argv[i] = argv[i + 1];
200	    argv[argc - 1] = "-";
201	    continue;
202
203	case 'h':				/* -h [header] */
204	    /* Specify header string. */
205	    if (argc == 1) {
206		printf("'ds =H\n");
207		break;
208	    }
209	    printf("'ds =H %s\n", argv[1]);
210	    argc--, argv++;
211	    break;
212
213	case 'l':				/* -l<language> */
214	    /* Specify the language. */
215	    language = cp + 1;
216	    break;
217
218	case 'n':				/* -n */
219	    /* Indicate no keywords. */
220	    nokeyw = 1;
221	    break;
222
223	case 's':				/* -s<size> */
224	    /* Specify the font size. */
225	    i = 0;
226	    cp++;
227	    while (*cp)
228		i = i * 10 + (*cp++ - '0');
229	    printf("'nr vP %d\n", i);
230	    break;
231
232	case 't':				/* -t */
233	    /* Specify a nondefault tab size. */
234	    tabsize = 4;
235	    break;
236
237	case 'x':				/* -x */
238	    /* Build an index. */
239	    doindex = 1;
240	    /* This option implies "-n" as well; turn it on. */
241	    argv[0] = "-n";
242	    continue;
243	}
244
245	/* Advance to next argument. */
246	argc--, argv++;
247    }
248
249flagsdone:
250
251    /*
252     * Get the language definition from the defs file.
253     */
254    i = tgetent (defs, language, defsfile);
255    if (i == 0) {
256	fprintf (stderr, gettext("no entry for language %s\n"), language);
257	exit (0);
258    } else  if (i < 0) {
259	fprintf (stderr,  gettext("cannot find vgrindefs file %s\n"), defsfile);
260	exit (0);
261    }
262    cp = strings;
263    if (tgetstr ("kw", &cp) == NIL)
264	nokeyw = TRUE;
265    else  {
266	char **cpp;
267
268	cpp = l_keywds;
269	cp = strings;
270	while (*cp) {
271	    while (*cp == ' ' || *cp =='\t')
272		*cp++ = NULL;
273	    if (*cp)
274		*cpp++ = cp;
275	    while (*cp != ' ' && *cp  != '\t' && *cp)
276		cp++;
277	}
278	*cpp = NIL;
279    }
280    cp = buf;
281    l_prcbeg = convexp (tgetstr ("pb", &cp));
282    cp = buf;
283    l_combeg = convexp (tgetstr ("cb", &cp));
284    cp = buf;
285    l_comend = convexp (tgetstr ("ce", &cp));
286    cp = buf;
287    l_acmbeg = convexp (tgetstr ("ab", &cp));
288    cp = buf;
289    l_acmend = convexp (tgetstr ("ae", &cp));
290    cp = buf;
291    l_strbeg = convexp (tgetstr ("sb", &cp));
292    cp = buf;
293    l_strend = convexp (tgetstr ("se", &cp));
294    cp = buf;
295    l_blkbeg = convexp (tgetstr ("bb", &cp));
296    cp = buf;
297    l_blkend = convexp (tgetstr ("be", &cp));
298    cp = buf;
299    l_chrbeg = convexp (tgetstr ("lb", &cp));
300    cp = buf;
301    l_chrend = convexp (tgetstr ("le", &cp));
302    cp = buf;
303    l_prcenable = convexp (tgetstr ("px", &cp));
304    cp = idbuf;
305    l_idchars = tgetstr ("id", &cp);
306    /* Set default, for compatibility with old version */
307    if (l_idchars == NIL)
308	l_idchars = "_";
309    l_escape = '\\';
310    l_onecase = tgetflag ("oc");
311    l_toplex = tgetflag ("tl");
312    l_prclevel = tgetflag ("pl");
313
314    /*
315     * Emit a call to the initialization macro.  If not in filter mode, emit a
316     * call to the vS macro, so that tmac.vgrind can uniformly assume that all
317     * program input is bracketed with vS-vE pairs.
318     */
319    printf("'vI\n");
320    if (!filter)
321	printf("'vS\n");
322
323    if (doindex) {
324	/*
325	 * XXX:	Hard-wired spacing information.  This should probably turn
326	 *	into the emission of a macro invocation, so that tmac.vgrind
327	 *	can make up its own mind about what spacing is appropriate.
328	 */
329	if (twocol)
330	    printf("'ta 2.5i 2.75i 4.0iR\n'in .25i\n");
331	else
332	    printf("'ta 4i 4.25i 5.5iR\n'in .5i\n");
333    }
334
335    while (argc > 0) {
336	if (strcmp(argv[0], "-") == 0) {
337	    /* Embed an instance of the original stdin. */
338	    in = fdopen(fileno(stdin), "r");
339	    fname = "";
340	} else {
341	    /* Open the file for input. */
342	    if ((in = fopen(argv[0], "r")) == NULL) {
343		perror(argv[0]);
344		exit(1);
345	    }
346	    fname = argv[0];
347	}
348	argc--, argv++;
349
350	/*
351	 * Reinitialize for the current file.
352	 */
353	incomm = FALSE;
354	instr = FALSE;
355	inchr = FALSE;
356	_escaped = FALSE;
357	blklevel = 0;
358	prclevel = -1;
359	for (psptr=0; psptr<PSMAX; psptr++) {
360	    pstack[psptr][0] = NULL;
361	    plstack[psptr] = 0;
362	}
363	psptr = -1;
364	printf("'-F\n");
365	if (!filter) {
366	    char *cp;
367
368	    printf(".ds =F %s\n", fname);
369	    if (needbp) {
370		needbp = 0;
371		printf(".()\n");
372		printf(".bp\n");
373	    }
374	    fstat(fileno(in), &stbuf);
375	    cp = ctime(&stbuf.st_mtime);
376	    cp[16] = '\0';
377	    cp[24] = '\0';
378	    printf(".ds =M %s %s\n", cp+4, cp+20);
379	    printf("'wh 0 vH\n");
380	    printf("'wh -1i vF\n");
381	}
382	if (needbp && filter) {
383	    needbp = 0;
384	    printf(".()\n");
385	    printf(".bp\n");
386	}
387
388	/*
389	 *	MAIN LOOP!!!
390	 */
391	while (fgets(buf, sizeof buf, in) != NULL) {
392	    if (buf[0] == '\f') {
393		printf(".bp\n");
394	    }
395	    if (buf[0] == '.') {
396		printf("%s", buf);
397		if (!strncmp (buf+1, "vS", 2))
398		    pass = TRUE;
399		if (!strncmp (buf+1, "vE", 2))
400		    pass = FALSE;
401		continue;
402	    }
403	    prccont = FALSE;
404	    if (!filter || pass)
405		putScp(buf);
406	    else
407		printf("%s", buf);
408	    if (prccont && (psptr >= 0))
409		printf("'FC %s\n", pstack[psptr]);
410#ifdef DEBUG
411	    printf ("com %o str %o chr %o ptr %d\n", incomm, instr, inchr, psptr);
412#endif
413	    margin = 0;
414	}
415
416	needbp = 1;
417	(void) fclose(in);
418    }
419
420    /* Close off the vS-vE pair. */
421    if (!filter)
422	printf("'vE\n");
423
424    return (0);
425}
426
427#define isidchr(c) (isalnum(c) || ((c) != NIL && strchr(l_idchars, (c)) != NIL))
428
429static void
430putScp(char *os)
431{
432    char *s = os;			/* pointer to unmatched string */
433    char dummy[BUFSIZ];			/* dummy to be used by expmatch */
434    char *comptr;			/* end of a comment delimiter */
435    char *acmptr;			/* end of a comment delimiter */
436    char *strptr;			/* end of a string delimiter */
437    char *chrptr;			/* end of a character const delimiter */
438    char *blksptr;			/* end of a lexical block start */
439    char *blkeptr;			/* end of a lexical block end */
440
441    Start = os;			/* remember the start for expmatch */
442    _escaped = FALSE;
443    if (nokeyw || incomm || instr)
444	goto skip;
445    if (isproc(s)) {
446	printf("'FN %s\n", pname);
447	if (psptr < PSMAX-1) {
448	    ++psptr;
449	    strncpy (pstack[psptr], pname, PNAMELEN);
450	    pstack[psptr][PNAMELEN] = NULL;
451	    plstack[psptr] = blklevel;
452	}
453    }
454    /*
455     * if l_prclevel is set, check to see whether this lexical level
456     * is one immediately below which procedure definitions are allowed.
457     */
458    if (l_prclevel && !incomm && !instr && !inchr) {
459	if (expmatch (s, l_prcenable, dummy) != NIL)
460	    prclevel = blklevel + 1;
461    }
462skip:
463    do {
464	/* check for string, comment, blockstart, etc */
465	if (!incomm && !instr && !inchr) {
466
467	    blkeptr = expmatch (s, l_blkend, dummy);
468	    blksptr = expmatch (s, l_blkbeg, dummy);
469	    comptr = expmatch (s, l_combeg, dummy);
470	    acmptr = expmatch (s, l_acmbeg, dummy);
471	    strptr = expmatch (s, l_strbeg, dummy);
472	    chrptr = expmatch (s, l_chrbeg, dummy);
473
474	    /* start of a comment? */
475	    if (comptr != NIL)
476		if ((comptr < strptr || strptr == NIL)
477		  && (comptr < acmptr || acmptr == NIL)
478		  && (comptr < chrptr || chrptr == NIL)
479		  && (comptr < blksptr || blksptr == NIL)
480		  && (comptr < blkeptr || blkeptr == NIL)) {
481		    putKcp (s, comptr-1, FALSE);
482		    s = comptr;
483		    incomm = TRUE;
484		    comtype = STANDARD;
485		    if (s != os)
486			printf ("\\c");
487		    printf ("\\c\n'+C\n");
488		    continue;
489		}
490
491	    /* start of a comment? */
492	    if (acmptr != NIL)
493		if ((acmptr < strptr || strptr == NIL)
494		  && (acmptr < chrptr || chrptr == NIL)
495		  && (acmptr < blksptr || blksptr == NIL)
496		  && (acmptr < blkeptr || blkeptr == NIL)) {
497		    putKcp (s, acmptr-1, FALSE);
498		    s = acmptr;
499		    incomm = TRUE;
500		    comtype = ALTERNATE;
501		    if (s != os)
502			printf ("\\c");
503		    printf ("\\c\n'+C\n");
504		    continue;
505		}
506
507	    /* start of a string? */
508	    if (strptr != NIL)
509		if ((strptr < chrptr || chrptr == NIL)
510		  && (strptr < blksptr || blksptr == NIL)
511		  && (strptr < blkeptr || blkeptr == NIL)) {
512		    putKcp (s, strptr-1, FALSE);
513		    s = strptr;
514		    instr = TRUE;
515		    continue;
516		}
517
518	    /* start of a character string? */
519	    if (chrptr != NIL)
520		if ((chrptr < blksptr || blksptr == NIL)
521		  && (chrptr < blkeptr || blkeptr == NIL)) {
522		    putKcp (s, chrptr-1, FALSE);
523		    s = chrptr;
524		    inchr = TRUE;
525		    continue;
526		}
527
528	    /* end of a lexical block */
529	    if (blkeptr != NIL) {
530		if (blkeptr < blksptr || blksptr == NIL) {
531		    /* reset prclevel if necessary */
532		    if (l_prclevel && prclevel == blklevel)
533			prclevel = -1;
534		    putKcp (s, blkeptr - 1, FALSE);
535		    s = blkeptr;
536		    blklevel--;
537		    if (psptr >= 0 && plstack[psptr] >= blklevel) {
538
539			/* end of current procedure */
540			if (s != os)
541			    printf ("\\c");
542			printf ("\\c\n'-F\n");
543			blklevel = plstack[psptr];
544
545			/* see if we should print the last proc name */
546			if (--psptr >= 0)
547			    prccont = TRUE;
548			else
549			    psptr = -1;
550		    }
551		    continue;
552		}
553	    }
554
555	    /* start of a lexical block */
556	    if (blksptr != NIL) {
557		putKcp (s, blksptr - 1, FALSE);
558		s = blksptr;
559		blklevel++;
560		continue;
561	    }
562
563	/* check for end of comment */
564	} else if (incomm) {
565	    comptr = expmatch (s, l_comend, dummy);
566	    acmptr = expmatch (s, l_acmend, dummy);
567	    if (((comtype == STANDARD) && (comptr != NIL)) ||
568	        ((comtype == ALTERNATE) && (acmptr != NIL))) {
569		if (comtype == STANDARD) {
570		    putKcp (s, comptr-1, TRUE);
571		    s = comptr;
572		} else {
573		    putKcp (s, acmptr-1, TRUE);
574		    s = acmptr;
575		}
576		incomm = FALSE;
577		printf("\\c\n'-C\n");
578		continue;
579	    } else {
580		putKcp (s, s + strlen(s) -1, TRUE);
581		s = s + strlen(s);
582		continue;
583	    }
584
585	/* check for end of string */
586	} else if (instr) {
587	    if ((strptr = expmatch (s, l_strend, dummy)) != NIL) {
588		putKcp (s, strptr-1, TRUE);
589		s = strptr;
590		instr = FALSE;
591		continue;
592	    } else {
593		putKcp (s, s+strlen(s)-1, TRUE);
594		s = s + strlen(s);
595		continue;
596	    }
597
598	/* check for end of character string */
599	} else if (inchr) {
600	    if ((chrptr = expmatch (s, l_chrend, dummy)) != NIL) {
601		putKcp (s, chrptr-1, TRUE);
602		s = chrptr;
603		inchr = FALSE;
604		continue;
605	    } else {
606		putKcp (s, s+strlen(s)-1, TRUE);
607		s = s + strlen(s);
608		continue;
609	    }
610	}
611
612	/* print out the line */
613	putKcp (s, s + strlen(s) -1, FALSE);
614	s = s + strlen(s);
615    } while (*s);
616}
617
618static void
619putKcp(char *start, char *end, boolean force)
620	/* start - start of string to write */
621	/* end - end of string to write */
622	/* force - true if we should force nokeyw */
623{
624    int i;
625    int xfld = 0;
626
627    while (start <= end) {
628	if (doindex) {
629	    if (*start == ' ' || *start == '\t') {
630		if (xfld == 0)
631		    printf("");
632		printf("\t");
633		xfld = 1;
634		while (*start == ' ' || *start == '\t')
635		    start++;
636		continue;
637	    }
638	}
639
640	/* take care of nice tab stops */
641	if (*start == '\t') {
642	    while (*start == '\t')
643		start++;
644	    i = tabs(Start, start) - margin / tabsize;
645	    printf ("\\h'|%dn'",
646		    i * (tabsize == 4 ? 5 : 10) + 1 - margin % tabsize);
647	    continue;
648	}
649
650	if (!nokeyw && !force)
651	    if (  (*start == '#'   ||  isidchr(*start))
652	       && (start == Start || !isidchr(start[-1]))
653	       ) {
654		i = iskw(start);
655		if (i > 0) {
656		    printf("\\*(+K");
657		    do
658			putcp(*start++);
659		    while (--i > 0);
660		    printf("\\*(-K");
661		    continue;
662		}
663	    }
664
665	putcp (*start++);
666    }
667}
668
669
670static int
671tabs(char *s, char *os)
672{
673
674    return (width(s, os) / tabsize);
675}
676
677static int
678width(char *s, char *os)
679{
680	int i = 0;
681	unsigned char c;
682	int n;
683
684	while (s < os) {
685		if (*s == '\t') {
686			i = (i + tabsize) &~ (tabsize-1);
687			s++;
688			continue;
689		}
690		c = *(unsigned char *)s;
691		if (c < ' ')
692			i += 2, s++;
693		else if (c >= 0200) {
694			if ((n = mblen(s, MB_CUR_MAX)) > 0) {
695				i += csetcol(csetno(c));
696				s += n;
697			} else
698				s++;
699		} else
700			i++, s++;
701	}
702	return (i);
703}
704
705static void
706putcp(int c)
707{
708
709	switch(c) {
710
711	case 0:
712		break;
713
714	case '\f':
715		break;
716
717	case '{':
718		printf("\\*(+K{\\*(-K");
719		break;
720
721	case '}':
722		printf("\\*(+K}\\*(-K");
723		break;
724
725	case '\\':
726		printf("\\e");
727		break;
728
729	case '_':
730		printf("\\*_");
731		break;
732
733	case '-':
734		printf("\\*-");
735		break;
736
737		/*
738		 * The following two cases deal with the accent characters.
739		 * If they're part of a comment, we assume that they're part
740		 * of running text and hand them to troff as regular quote
741		 * characters.  Otherwise, we assume they're being used as
742		 * special characters (e.g., string delimiters) and arrange
743		 * for troff to render them as accents.  This is an imperfect
744		 * heuristic that produces slightly better appearance than the
745		 * former behavior of unconditionally rendering the characters
746		 * as accents.  (See bug 1040343.)
747		 */
748
749	case '`':
750		if (incomm)
751			printf("`");
752		else
753			printf("\\`");
754		break;
755
756	case '\'':
757		if (incomm)
758			printf("'");
759		else
760			printf("\\'");
761		break;
762
763	case '.':
764		printf("\\&.");
765		break;
766
767		/*
768		 * The following two cases contain special hacking
769		 * to make C-style comments line up.  The tests aren't
770		 * really adequate; they lead to grotesqueries such
771		 * as italicized multiplication and division operators.
772		 * However, the obvious test (!incomm) doesn't work,
773		 * because incomm isn't set until after we've put out
774		 * the comment-begin characters.  The real problem is
775		 * that expmatch() doesn't give us enough information.
776		 */
777
778	case '*':
779		if (instr || inchr)
780			printf("*");
781		else
782			printf("\\f2*\\fP");
783		break;
784
785	case '/':
786		if (instr || inchr)
787			printf("/");
788		else
789			printf("\\f2\\h'\\w' 'u-\\w'/'u'/\\fP");
790		break;
791
792	default:
793		if (c < 040)
794			putchar('^'), c |= '@';
795	case '\t':
796	case '\n':
797		putchar(c);
798	}
799}
800
801/*
802 *	look for a process beginning on this line
803 */
804boolean
805isproc(s)
806    char *s;
807{
808    pname[0] = NULL;
809    if (l_prclevel ? (prclevel == blklevel) : (!l_toplex || blklevel == 0))
810	if (expmatch (s, l_prcbeg, pname) != NIL) {
811	    return (TRUE);
812	}
813    return (FALSE);
814}
815
816
817/*
818 * iskw - check to see if the next word is a keyword
819 *	Return its length if it is or 0 if it isn't.
820 */
821
822static int
823iskw(char *s)
824{
825	char **ss = l_keywds;
826	int i = 1;
827	char *cp = s;
828
829	/* Get token length. */
830	while (++cp, isidchr(*cp))
831		i++;
832
833	while (cp = *ss++) {
834		if (!STRNCMP(s,cp,i) && !isidchr(cp[i]))
835			return (i);
836	}
837	return (0);
838}
839