1 /* $NetBSD: slc-gram.y,v 1.1.1.2 2014/04/24 12:45:53 pettai Exp $ */
2
3 %{
4 /*
5 * Copyright (c) 2004-2006 Kungliga Tekniska Högskolan
6 * (Royal Institute of Technology, Stockholm, Sweden).
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * 3. Neither the name of the Institute nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37 #include <config.h>
38
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <err.h>
42 #include <ctype.h>
43 #include <limits.h>
44 #include <getarg.h>
45 #include <vers.h>
46 #include <roken.h>
47
48 #include "slc.h"
49 extern FILE *yyin;
50 extern struct assignment *assignment;
51
52 /* Declarations for Bison:
53 */
54 #define YYMALLOC malloc
55 #define YYFREE free
56
57 %}
58
59 %union {
60 char *string;
61 struct assignment *assignment;
62 }
63
64 %token <string> LITERAL
65 %token <string> STRING
66 %type <assignment> assignment assignments
67
68 %start start
69
70 %%
71
72 start : assignments
73 {
74 assignment = $1;
75 }
76 ;
77
78 assignments : assignment assignments
79 {
80 $1->next = $2;
81 $$ = $1;
82 }
83 | assignment
84 ;
85
86 assignment : LITERAL '=' STRING
87 {
88 $$ = malloc(sizeof(*$$));
89 $$->name = $1;
90 $$->type = a_value;
91 $$->lineno = lineno;
92 $$->u.value = $3;
93 $$->next = NULL;
94 }
95 | LITERAL '=' '{' assignments '}'
96 {
97 $$ = malloc(sizeof(*$$));
98 $$->name = $1;
99 $$->type = a_assignment;
100 $$->lineno = lineno;
101 $$->u.assignment = $4;
102 $$->next = NULL;
103 }
104 ;
105
106 %%
107 char *filename;
108 FILE *cfile, *hfile;
109 int error_flag;
110 struct assignment *assignment;
111
112
113 static void
ex(struct assignment * a,const char * fmt,...)114 ex(struct assignment *a, const char *fmt, ...)
115 {
116 va_list ap;
117 fprintf(stderr, "%s:%d: ", a->name, a->lineno);
118 va_start(ap, fmt);
119 vfprintf(stderr, fmt, ap);
120 va_end(ap);
121 fprintf(stderr, "\n");
122 }
123
124
125
126 static int
check_option(struct assignment * as)127 check_option(struct assignment *as)
128 {
129 struct assignment *a;
130 int seen_long = 0;
131 int seen_name = 0;
132 int seen_short = 0;
133 int seen_type = 0;
134 int seen_argument = 0;
135 int seen_help = 0;
136 int seen_default = 0;
137 int ret = 0;
138
139 for(a = as; a != NULL; a = a->next) {
140 if(strcmp(a->name, "long") == 0)
141 seen_long++;
142 else if(strcmp(a->name, "short") == 0)
143 seen_short++;
144 else if(strcmp(a->name, "name") == 0)
145 seen_name++;
146 else if(strcmp(a->name, "type") == 0)
147 seen_type++;
148 else if(strcmp(a->name, "argument") == 0)
149 seen_argument++;
150 else if(strcmp(a->name, "help") == 0)
151 seen_help++;
152 else if(strcmp(a->name, "default") == 0)
153 seen_default++;
154 else {
155 ex(a, "unknown name %s", a->name);
156 ret++;
157 }
158 }
159 if(seen_long == 0 && seen_short == 0) {
160 ex(as, "neither long nor short option");
161 ret++;
162 }
163 if (seen_long == 0 && seen_name == 0) {
164 ex(as, "either of long or name option must be used");
165 ret++;
166 }
167 if(seen_long > 1) {
168 ex(as, "multiple long options");
169 ret++;
170 }
171 if(seen_short > 1) {
172 ex(as, "multiple short options");
173 ret++;
174 }
175 if(seen_type > 1) {
176 ex(as, "multiple types");
177 ret++;
178 }
179 if(seen_argument > 1) {
180 ex(as, "multiple arguments");
181 ret++;
182 }
183 if(seen_help > 1) {
184 ex(as, "multiple help strings");
185 ret++;
186 }
187 if(seen_default > 1) {
188 ex(as, "multiple default values");
189 ret++;
190 }
191 return ret;
192 }
193
194 static int
check_command(struct assignment * as)195 check_command(struct assignment *as)
196 {
197 struct assignment *a;
198 int seen_name = 0;
199 int seen_function = 0;
200 int seen_help = 0;
201 int seen_argument = 0;
202 int seen_minargs = 0;
203 int seen_maxargs = 0;
204 int ret = 0;
205 for(a = as; a != NULL; a = a->next) {
206 if(strcmp(a->name, "name") == 0)
207 seen_name++;
208 else if(strcmp(a->name, "function") == 0) {
209 seen_function++;
210 } else if(strcmp(a->name, "option") == 0)
211 ret += check_option(a->u.assignment);
212 else if(strcmp(a->name, "help") == 0) {
213 seen_help++;
214 } else if(strcmp(a->name, "argument") == 0) {
215 seen_argument++;
216 } else if(strcmp(a->name, "min_args") == 0) {
217 seen_minargs++;
218 } else if(strcmp(a->name, "max_args") == 0) {
219 seen_maxargs++;
220 } else {
221 ex(a, "unknown name: %s", a->name);
222 ret++;
223 }
224 }
225 if(seen_name == 0) {
226 ex(as, "no command name");
227 ret++;
228 }
229 if(seen_function > 1) {
230 ex(as, "multiple function names");
231 ret++;
232 }
233 if(seen_help > 1) {
234 ex(as, "multiple help strings");
235 ret++;
236 }
237 if(seen_argument > 1) {
238 ex(as, "multiple argument strings");
239 ret++;
240 }
241 if(seen_minargs > 1) {
242 ex(as, "multiple min_args strings");
243 ret++;
244 }
245 if(seen_maxargs > 1) {
246 ex(as, "multiple max_args strings");
247 ret++;
248 }
249
250 return ret;
251 }
252
253 static int
check(struct assignment * as)254 check(struct assignment *as)
255 {
256 struct assignment *a;
257 int ret = 0;
258 for(a = as; a != NULL; a = a->next) {
259 if(strcmp(a->name, "command")) {
260 fprintf(stderr, "unknown type %s line %d\n", a->name, a->lineno);
261 ret++;
262 continue;
263 }
264 if(a->type != a_assignment) {
265 fprintf(stderr, "bad command definition %s line %d\n", a->name, a->lineno);
266 ret++;
267 continue;
268 }
269 ret += check_command(a->u.assignment);
270 }
271 return ret;
272 }
273
274 static struct assignment *
find_next(struct assignment * as,const char * name)275 find_next(struct assignment *as, const char *name)
276 {
277 for(as = as->next; as != NULL; as = as->next) {
278 if(strcmp(as->name, name) == 0)
279 return as;
280 }
281 return NULL;
282 }
283
284 static struct assignment *
find(struct assignment * as,const char * name)285 find(struct assignment *as, const char *name)
286 {
287 for(; as != NULL; as = as->next) {
288 if(strcmp(as->name, name) == 0)
289 return as;
290 }
291 return NULL;
292 }
293
294 static void
space(FILE * f,int level)295 space(FILE *f, int level)
296 {
297 fprintf(f, "%*.*s", level * 4, level * 4, " ");
298 }
299
300 static void
cprint(int level,const char * fmt,...)301 cprint(int level, const char *fmt, ...)
302 {
303 va_list ap;
304 va_start(ap, fmt);
305 space(cfile, level);
306 vfprintf(cfile, fmt, ap);
307 va_end(ap);
308 }
309
310 static void
hprint(int level,const char * fmt,...)311 hprint(int level, const char *fmt, ...)
312 {
313 va_list ap;
314 va_start(ap, fmt);
315 space(hfile, level);
316 vfprintf(hfile, fmt, ap);
317 va_end(ap);
318 }
319
320 static void gen_name(char *str);
321
322 static void
gen_command(struct assignment * as)323 gen_command(struct assignment *as)
324 {
325 struct assignment *a, *b;
326 char *f;
327 a = find(as, "name");
328 f = strdup(a->u.value);
329 gen_name(f);
330 cprint(1, " { ");
331 fprintf(cfile, "\"%s\", ", a->u.value);
332 fprintf(cfile, "%s_wrap, ", f);
333 b = find(as, "argument");
334 if(b)
335 fprintf(cfile, "\"%s %s\", ", a->u.value, b->u.value);
336 else
337 fprintf(cfile, "\"%s\", ", a->u.value);
338 b = find(as, "help");
339 if(b)
340 fprintf(cfile, "\"%s\"", b->u.value);
341 else
342 fprintf(cfile, "NULL");
343 fprintf(cfile, " },\n");
344 for(a = a->next; a != NULL; a = a->next)
345 if(strcmp(a->name, "name") == 0)
346 cprint(1, " { \"%s\" },\n", a->u.value);
347 cprint(0, "\n");
348 }
349
350 static void
gen_name(char * str)351 gen_name(char *str)
352 {
353 char *p;
354 for(p = str; *p != '\0'; p++)
355 if(!isalnum((unsigned char)*p))
356 *p = '_';
357 }
358
359 static char *
make_name(struct assignment * as)360 make_name(struct assignment *as)
361 {
362 struct assignment *lopt;
363 struct assignment *type;
364 char *s;
365
366 lopt = find(as, "long");
367 if(lopt == NULL)
368 lopt = find(as, "name");
369 if(lopt == NULL)
370 return NULL;
371
372 type = find(as, "type");
373 if(strcmp(type->u.value, "-flag") == 0)
374 asprintf(&s, "%s_flag", lopt->u.value);
375 else
376 asprintf(&s, "%s_%s", lopt->u.value, type->u.value);
377 gen_name(s);
378 return s;
379 }
380
381
defval_int(const char * name,struct assignment * defval)382 static void defval_int(const char *name, struct assignment *defval)
383 {
384 if(defval != NULL)
385 cprint(1, "opt.%s = %s;\n", name, defval->u.value);
386 else
387 cprint(1, "opt.%s = 0;\n", name);
388 }
defval_neg_flag(const char * name,struct assignment * defval)389 static void defval_neg_flag(const char *name, struct assignment *defval)
390 {
391 if(defval != NULL)
392 cprint(1, "opt.%s = %s;\n", name, defval->u.value);
393 else
394 cprint(1, "opt.%s = 1;\n", name);
395 }
defval_string(const char * name,struct assignment * defval)396 static void defval_string(const char *name, struct assignment *defval)
397 {
398 if(defval != NULL)
399 cprint(1, "opt.%s = (char *)(unsigned long)\"%s\";\n", name, defval->u.value);
400 else
401 cprint(1, "opt.%s = NULL;\n", name);
402 }
defval_strings(const char * name,struct assignment * defval)403 static void defval_strings(const char *name, struct assignment *defval)
404 {
405 cprint(1, "opt.%s.num_strings = 0;\n", name);
406 cprint(1, "opt.%s.strings = NULL;\n", name);
407 }
408
free_strings(const char * name)409 static void free_strings(const char *name)
410 {
411 cprint(1, "free_getarg_strings (&opt.%s);\n", name);
412 }
413
414 struct type_handler {
415 const char *typename;
416 const char *c_type;
417 const char *getarg_type;
418 void (*defval)(const char*, struct assignment*);
419 void (*free)(const char*);
420 } type_handlers[] = {
421 { "integer",
422 "int",
423 "arg_integer",
424 defval_int,
425 NULL
426 },
427 { "string",
428 "char*",
429 "arg_string",
430 defval_string,
431 NULL
432 },
433 { "strings",
434 "struct getarg_strings",
435 "arg_strings",
436 defval_strings,
437 free_strings
438 },
439 { "flag",
440 "int",
441 "arg_flag",
442 defval_int,
443 NULL
444 },
445 { "-flag",
446 "int",
447 "arg_negative_flag",
448 defval_neg_flag,
449 NULL
450 },
451 { NULL }
452 };
453
find_handler(struct assignment * type)454 static struct type_handler *find_handler(struct assignment *type)
455 {
456 struct type_handler *th;
457 for(th = type_handlers; th->typename != NULL; th++)
458 if(strcmp(type->u.value, th->typename) == 0)
459 return th;
460 ex(type, "unknown type \"%s\"", type->u.value);
461 exit(1);
462 }
463
464 static void
gen_options(struct assignment * opt1,const char * name)465 gen_options(struct assignment *opt1, const char *name)
466 {
467 struct assignment *tmp;
468
469 hprint(0, "struct %s_options {\n", name);
470
471 for(tmp = opt1;
472 tmp != NULL;
473 tmp = find_next(tmp, "option")) {
474 struct assignment *type;
475 struct type_handler *th;
476 char *s;
477
478 s = make_name(tmp->u.assignment);
479 type = find(tmp->u.assignment, "type");
480 th = find_handler(type);
481 hprint(1, "%s %s;\n", th->c_type, s);
482 free(s);
483 }
484 hprint(0, "};\n");
485 }
486
487 static void
gen_wrapper(struct assignment * as)488 gen_wrapper(struct assignment *as)
489 {
490 struct assignment *name;
491 struct assignment *arg;
492 struct assignment *opt1;
493 struct assignment *function;
494 struct assignment *tmp;
495 char *n, *f;
496 int nargs = 0;
497 int narguments = 0;
498
499 name = find(as, "name");
500 n = strdup(name->u.value);
501 gen_name(n);
502 arg = find(as, "argument");
503 if (arg)
504 narguments++;
505 opt1 = find(as, "option");
506 function = find(as, "function");
507 if(function)
508 f = function->u.value;
509 else
510 f = n;
511
512
513 if(opt1 != NULL) {
514 gen_options(opt1, n);
515 hprint(0, "int %s(struct %s_options*, int, char **);\n", f, n);
516 } else {
517 hprint(0, "int %s(void*, int, char **);\n", f);
518 }
519
520 fprintf(cfile, "static int\n");
521 fprintf(cfile, "%s_wrap(int argc, char **argv)\n", n);
522 fprintf(cfile, "{\n");
523 if(opt1 != NULL)
524 cprint(1, "struct %s_options opt;\n", n);
525 cprint(1, "int ret;\n");
526 cprint(1, "int optidx = 0;\n");
527 cprint(1, "struct getargs args[] = {\n");
528 for(tmp = find(as, "option");
529 tmp != NULL;
530 tmp = find_next(tmp, "option")) {
531 struct assignment *type = find(tmp->u.assignment, "type");
532 struct assignment *lopt = find(tmp->u.assignment, "long");
533 struct assignment *sopt = find(tmp->u.assignment, "short");
534 struct assignment *aarg = find(tmp->u.assignment, "argument");
535 struct assignment *help = find(tmp->u.assignment, "help");
536
537 struct type_handler *th;
538
539 cprint(2, "{ ");
540 if(lopt)
541 fprintf(cfile, "\"%s\", ", lopt->u.value);
542 else
543 fprintf(cfile, "NULL, ");
544 if(sopt)
545 fprintf(cfile, "'%c', ", *sopt->u.value);
546 else
547 fprintf(cfile, "0, ");
548 th = find_handler(type);
549 fprintf(cfile, "%s, ", th->getarg_type);
550 fprintf(cfile, "NULL, ");
551 if(help)
552 fprintf(cfile, "\"%s\", ", help->u.value);
553 else
554 fprintf(cfile, "NULL, ");
555 if(aarg) {
556 fprintf(cfile, "\"%s\"", aarg->u.value);
557 narguments++;
558 } else
559 fprintf(cfile, "NULL");
560 fprintf(cfile, " },\n");
561 }
562 cprint(2, "{ \"help\", 'h', arg_flag, NULL, NULL, NULL }\n");
563 cprint(1, "};\n");
564 cprint(1, "int help_flag = 0;\n");
565
566 for(tmp = find(as, "option");
567 tmp != NULL;
568 tmp = find_next(tmp, "option")) {
569 char *s;
570 struct assignment *type = find(tmp->u.assignment, "type");
571
572 struct assignment *defval = find(tmp->u.assignment, "default");
573
574 struct type_handler *th;
575
576 s = make_name(tmp->u.assignment);
577 th = find_handler(type);
578 (*th->defval)(s, defval);
579 free(s);
580 }
581
582 for(tmp = find(as, "option");
583 tmp != NULL;
584 tmp = find_next(tmp, "option")) {
585 char *s;
586 s = make_name(tmp->u.assignment);
587 cprint(1, "args[%d].value = &opt.%s;\n", nargs++, s);
588 free(s);
589 }
590 cprint(1, "args[%d].value = &help_flag;\n", nargs++);
591 cprint(1, "if(getarg(args, %d, argc, argv, &optidx))\n", nargs);
592 cprint(2, "goto usage;\n");
593
594 {
595 int min_args = -1;
596 int max_args = -1;
597 char *end;
598 if(narguments == 0) {
599 max_args = 0;
600 } else {
601 if((tmp = find(as, "min_args")) != NULL) {
602 min_args = strtol(tmp->u.value, &end, 0);
603 if(*end != '\0') {
604 ex(tmp, "min_args is not numeric");
605 exit(1);
606 }
607 if(min_args < 0) {
608 ex(tmp, "min_args must be non-negative");
609 exit(1);
610 }
611 }
612 if((tmp = find(as, "max_args")) != NULL) {
613 max_args = strtol(tmp->u.value, &end, 0);
614 if(*end != '\0') {
615 ex(tmp, "max_args is not numeric");
616 exit(1);
617 }
618 if(max_args < 0) {
619 ex(tmp, "max_args must be non-negative");
620 exit(1);
621 }
622 }
623 }
624 if(min_args != -1 || max_args != -1) {
625 if(min_args == max_args) {
626 cprint(1, "if(argc - optidx != %d) {\n",
627 min_args);
628 cprint(2, "fprintf(stderr, \"Need exactly %u parameters (%%u given).\\n\\n\", argc - optidx);\n", min_args);
629 cprint(2, "goto usage;\n");
630 cprint(1, "}\n");
631 } else {
632 if(max_args != -1) {
633 cprint(1, "if(argc - optidx > %d) {\n", max_args);
634 cprint(2, "fprintf(stderr, \"Arguments given (%%u) are more than expected (%u).\\n\\n\", argc - optidx);\n", max_args);
635 cprint(2, "goto usage;\n");
636 cprint(1, "}\n");
637 }
638 if(min_args != -1) {
639 cprint(1, "if(argc - optidx < %d) {\n", min_args);
640 cprint(2, "fprintf(stderr, \"Arguments given (%%u) are less than expected (%u).\\n\\n\", argc - optidx);\n", min_args);
641 cprint(2, "goto usage;\n");
642 cprint(1, "}\n");
643 }
644 }
645 }
646 }
647
648 cprint(1, "if(help_flag)\n");
649 cprint(2, "goto usage;\n");
650
651 cprint(1, "ret = %s(%s, argc - optidx, argv + optidx);\n",
652 f, opt1 ? "&opt": "NULL");
653
654 /* free allocated data */
655 for(tmp = find(as, "option");
656 tmp != NULL;
657 tmp = find_next(tmp, "option")) {
658 char *s;
659 struct assignment *type = find(tmp->u.assignment, "type");
660 struct type_handler *th;
661 th = find_handler(type);
662 if(th->free == NULL)
663 continue;
664 s = make_name(tmp->u.assignment);
665 (*th->free)(s);
666 free(s);
667 }
668 cprint(1, "return ret;\n");
669
670 cprint(0, "usage:\n");
671 cprint(1, "arg_printusage (args, %d, \"%s\", \"%s\");\n", nargs,
672 name->u.value, arg ? arg->u.value : "");
673 /* free allocated data */
674 for(tmp = find(as, "option");
675 tmp != NULL;
676 tmp = find_next(tmp, "option")) {
677 char *s;
678 struct assignment *type = find(tmp->u.assignment, "type");
679 struct type_handler *th;
680 th = find_handler(type);
681 if(th->free == NULL)
682 continue;
683 s = make_name(tmp->u.assignment);
684 (*th->free)(s);
685 free(s);
686 }
687 cprint(1, "return 0;\n");
688 cprint(0, "}\n");
689 cprint(0, "\n");
690 }
691
692 char cname[PATH_MAX];
693 char hname[PATH_MAX];
694
695 static void
gen(struct assignment * as)696 gen(struct assignment *as)
697 {
698 struct assignment *a;
699 cprint(0, "#include <stdio.h>\n");
700 cprint(0, "#include <krb5/getarg.h>\n");
701 cprint(0, "#include <krb5/sl.h>\n");
702 cprint(0, "#include \"%s\"\n\n", hname);
703
704 hprint(0, "#include <stdio.h>\n");
705 hprint(0, "#include <krb5/sl.h>\n");
706 hprint(0, "\n");
707
708
709 for(a = as; a != NULL; a = a->next)
710 gen_wrapper(a->u.assignment);
711
712 cprint(0, "SL_cmd commands[] = {\n");
713 for(a = as; a != NULL; a = a->next)
714 gen_command(a->u.assignment);
715 cprint(1, "{ NULL }\n");
716 cprint(0, "};\n");
717
718 hprint(0, "extern SL_cmd commands[];\n");
719 }
720
721 int version_flag;
722 int help_flag;
723 struct getargs args[] = {
724 { "version", 0, arg_flag, &version_flag },
725 { "help", 0, arg_flag, &help_flag }
726 };
727 int num_args = sizeof(args) / sizeof(args[0]);
728
729 static void
usage(int code)730 usage(int code)
731 {
732 arg_printusage(args, num_args, NULL, "command-table");
733 exit(code);
734 }
735
736 int
main(int argc,char ** argv)737 main(int argc, char **argv)
738 {
739 char *p;
740
741 int optidx = 0;
742
743 setprogname(argv[0]);
744 if(getarg(args, num_args, argc, argv, &optidx))
745 usage(1);
746 if(help_flag)
747 usage(0);
748 if(version_flag) {
749 print_version(NULL);
750 exit(0);
751 }
752
753 if(argc == optidx)
754 usage(1);
755
756 filename = argv[optidx];
757 yyin = fopen(filename, "r");
758 if(yyin == NULL)
759 err(1, "%s", filename);
760 p = strrchr(filename, '/');
761 if(p)
762 strlcpy(cname, p + 1, sizeof(cname));
763 else
764 strlcpy(cname, filename, sizeof(cname));
765 p = strrchr(cname, '.');
766 if(p)
767 *p = '\0';
768 strlcpy(hname, cname, sizeof(hname));
769 strlcat(cname, ".c", sizeof(cname));
770 strlcat(hname, ".h", sizeof(hname));
771 yyparse();
772 if(error_flag)
773 exit(1);
774 if(check(assignment) == 0) {
775 cfile = fopen(cname, "w");
776 if(cfile == NULL)
777 err(1, "%s", cname);
778 hfile = fopen(hname, "w");
779 if(hfile == NULL)
780 err(1, "%s", hname);
781 gen(assignment);
782 fclose(cfile);
783 fclose(hfile);
784 }
785 fclose(yyin);
786 return 0;
787 }
788