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
37 char *expmatch(); /* match a string to an expression */
38 char *STRNCMP(); /* a different kind of strncmp */
39 char *convexp(); /* convert expression to internal form */
40
41 char *tgetstr(); /* extract a string-valued capability */
42 boolean isproc();
43 char *ctime();
44 char *strchr();
45
46 /*
47 * The state variables
48 */
49
50 boolean incomm; /* in a comment of the primary type */
51 boolean instr; /* in a string constant */
52 boolean inchr; /* in a string constant */
53 boolean nokeyw = FALSE; /* no keywords being flagged */
54 boolean doindex = FALSE; /* form an index */
55 boolean twocol = FALSE; /* in two-column mode */
56 boolean filter = FALSE; /* act as a filter (like eqn) */
57 boolean pass = FALSE; /* when acting as a filter, pass indicates
58 * whether we are currently processing
59 * input.
60 */
61 boolean prccont; /* continue last procedure */
62 int comtype; /* type of comment */
63 int margin;
64 int psptr; /* the stack index of the current procedure */
65 char pstack[PSMAX][PNAMELEN+1]; /* the procedure name stack */
66 int plstack[PSMAX]; /* the procedure nesting level stack */
67 int blklevel; /* current nesting level */
68 int prclevel; /* nesting level at which procedure definitions
69 may be found, -1 if none currently valid
70 (meaningful only if l_prclevel is true) */
71 char *defsfile = "/usr/lib/vgrindefs"; /* name of language definitions file */
72 char pname[BUFSIZ+1];
73
74 /*
75 * The language specific globals
76 */
77
78 char *language = "c"; /* the language indicator */
79 char *l_keywds[BUFSIZ/2]; /* keyword table address */
80 char *l_prcbeg; /* regular expr for procedure begin */
81 char *l_combeg; /* string introducing a comment */
82 char *l_comend; /* string ending a comment */
83 char *l_acmbeg; /* string introducing a comment */
84 char *l_acmend; /* string ending a comment */
85 char *l_blkbeg; /* string begining of a block */
86 char *l_blkend; /* string ending a block */
87 char *l_strbeg; /* delimiter for string constant */
88 char *l_strend; /* delimiter for string constant */
89 char *l_chrbeg; /* delimiter for character constant */
90 char *l_chrend; /* delimiter for character constant */
91 char *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 */
99 char l_escape; /* character used to escape characters */
100 boolean l_toplex; /* procedures only defined at top lex level */
101 boolean 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 */
109 short tabsize = 8;
110
111 /*
112 * global variables also used by expmatch
113 */
114 boolean _escaped; /* if last character was an escape */
115 char *Start; /* start of the current string */
116 boolean l_onecase; /* upper and lower case are equivalent */
117 char *l_idchars; /* characters legal in identifiers in addition
118 to letters and digits (default "_") */
119
120 static void putcp(int c);
121 static int width(char *s, char *os);
122 static int tabs(char *s, char *os);
123 static void putKcp(char *start, char *end, boolean force);
124 static void putScp(char *os);
125 static 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
133 int
main(int argc,char * argv[])134 main(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
249 flagsdone:
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
429 static void
putScp(char * os)430 putScp(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 }
462 skip:
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
618 static void
putKcp(char * start,char * end,boolean force)619 putKcp(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
670 static int
tabs(char * s,char * os)671 tabs(char *s, char *os)
672 {
673
674 return (width(s, os) / tabsize);
675 }
676
677 static int
width(char * s,char * os)678 width(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
705 static void
putcp(int c)706 putcp(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 */
804 boolean
isproc(s)805 isproc(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
822 static int
iskw(char * s)823 iskw(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