kconfig: reset generated values only if Kconfig and .config agree.
[linux-2.6.git] / scripts / kconfig / confdata.c
1 /*
2  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
3  * Released under the terms of the GNU GPL v2.0.
4  */
5
6 #include <sys/stat.h>
7 #include <ctype.h>
8 #include <fcntl.h>
9 #include <stdio.h>
10 #include <stdlib.h>
11 #include <string.h>
12 #include <time.h>
13 #include <unistd.h>
14
15 #define LKC_DIRECT_LINK
16 #include "lkc.h"
17
18 static void conf_warning(const char *fmt, ...)
19         __attribute__ ((format (printf, 1, 2)));
20
21 static const char *conf_filename;
22 static int conf_lineno, conf_warnings, conf_unsaved;
23
24 const char conf_defname[] = "arch/$ARCH/defconfig";
25
26 static void conf_warning(const char *fmt, ...)
27 {
28         va_list ap;
29         va_start(ap, fmt);
30         fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
31         vfprintf(stderr, fmt, ap);
32         fprintf(stderr, "\n");
33         va_end(ap);
34         conf_warnings++;
35 }
36
37 const char *conf_get_configname(void)
38 {
39         char *name = getenv("KCONFIG_CONFIG");
40
41         return name ? name : ".config";
42 }
43
44 static char *conf_expand_value(const char *in)
45 {
46         struct symbol *sym;
47         const char *src;
48         static char res_value[SYMBOL_MAXLENGTH];
49         char *dst, name[SYMBOL_MAXLENGTH];
50
51         res_value[0] = 0;
52         dst = name;
53         while ((src = strchr(in, '$'))) {
54                 strncat(res_value, in, src - in);
55                 src++;
56                 dst = name;
57                 while (isalnum(*src) || *src == '_')
58                         *dst++ = *src++;
59                 *dst = 0;
60                 sym = sym_lookup(name, 0);
61                 sym_calc_value(sym);
62                 strcat(res_value, sym_get_string_value(sym));
63                 in = src;
64         }
65         strcat(res_value, in);
66
67         return res_value;
68 }
69
70 char *conf_get_default_confname(void)
71 {
72         struct stat buf;
73         static char fullname[PATH_MAX+1];
74         char *env, *name;
75
76         name = conf_expand_value(conf_defname);
77         env = getenv(SRCTREE);
78         if (env) {
79                 sprintf(fullname, "%s/%s", env, name);
80                 if (!stat(fullname, &buf))
81                         return fullname;
82         }
83         return name;
84 }
85
86 int conf_read_simple(const char *name, int def)
87 {
88         FILE *in = NULL;
89         char line[1024];
90         char *p, *p2;
91         struct symbol *sym;
92         int i, def_flags;
93
94         if (name) {
95                 in = zconf_fopen(name);
96         } else {
97                 struct property *prop;
98
99                 name = conf_get_configname();
100                 in = zconf_fopen(name);
101                 if (in)
102                         goto load;
103                 sym_add_change_count(1);
104                 if (!sym_defconfig_list)
105                         return 1;
106
107                 for_all_defaults(sym_defconfig_list, prop) {
108                         if (expr_calc_value(prop->visible.expr) == no ||
109                             prop->expr->type != E_SYMBOL)
110                                 continue;
111                         name = conf_expand_value(prop->expr->left.sym->name);
112                         in = zconf_fopen(name);
113                         if (in) {
114                                 printf(_("#\n"
115                                          "# using defaults found in %s\n"
116                                          "#\n"), name);
117                                 goto load;
118                         }
119                 }
120         }
121         if (!in)
122                 return 1;
123
124 load:
125         conf_filename = name;
126         conf_lineno = 0;
127         conf_warnings = 0;
128         conf_unsaved = 0;
129
130         def_flags = SYMBOL_DEF << def;
131         for_all_symbols(i, sym) {
132                 sym->flags |= SYMBOL_CHANGED;
133                 sym->flags &= ~(def_flags|SYMBOL_VALID);
134                 if (sym_is_choice(sym))
135                         sym->flags |= def_flags;
136                 switch (sym->type) {
137                 case S_INT:
138                 case S_HEX:
139                 case S_STRING:
140                         if (sym->def[def].val)
141                                 free(sym->def[def].val);
142                 default:
143                         sym->def[def].val = NULL;
144                         sym->def[def].tri = no;
145                 }
146         }
147
148         while (fgets(line, sizeof(line), in)) {
149                 conf_lineno++;
150                 sym = NULL;
151                 switch (line[0]) {
152                 case '#':
153                         if (memcmp(line + 2, "CONFIG_", 7))
154                                 continue;
155                         p = strchr(line + 9, ' ');
156                         if (!p)
157                                 continue;
158                         *p++ = 0;
159                         if (strncmp(p, "is not set", 10))
160                                 continue;
161                         if (def == S_DEF_USER) {
162                                 sym = sym_find(line + 9);
163                                 if (!sym) {
164                                         conf_warning("trying to assign nonexistent symbol %s", line + 9);
165                                         break;
166                                 }
167                         } else {
168                                 sym = sym_lookup(line + 9, 0);
169                                 if (sym->type == S_UNKNOWN)
170                                         sym->type = S_BOOLEAN;
171                         }
172                         if (sym->flags & def_flags) {
173                                 conf_warning("trying to reassign symbol %s", sym->name);
174                                 break;
175                         }
176                         switch (sym->type) {
177                         case S_BOOLEAN:
178                         case S_TRISTATE:
179                                 sym->def[def].tri = no;
180                                 sym->flags |= def_flags;
181                                 break;
182                         default:
183                                 ;
184                         }
185                         break;
186                 case 'C':
187                         if (memcmp(line, "CONFIG_", 7)) {
188                                 conf_warning("unexpected data");
189                                 continue;
190                         }
191                         p = strchr(line + 7, '=');
192                         if (!p)
193                                 continue;
194                         *p++ = 0;
195                         p2 = strchr(p, '\n');
196                         if (p2) {
197                                 *p2-- = 0;
198                                 if (*p2 == '\r')
199                                         *p2 = 0;
200                         }
201                         if (def == S_DEF_USER) {
202                                 sym = sym_find(line + 7);
203                                 if (!sym) {
204                                         conf_warning("trying to assign nonexistent symbol %s", line + 7);
205                                         break;
206                                 }
207                         } else {
208                                 sym = sym_lookup(line + 7, 0);
209                                 if (sym->type == S_UNKNOWN)
210                                         sym->type = S_OTHER;
211                         }
212                         if (sym->flags & def_flags) {
213                                 conf_warning("trying to reassign symbol %s", sym->name);
214                                 break;
215                         }
216                         switch (sym->type) {
217                         case S_TRISTATE:
218                                 if (p[0] == 'm') {
219                                         sym->def[def].tri = mod;
220                                         sym->flags |= def_flags;
221                                         break;
222                                 }
223                         case S_BOOLEAN:
224                                 if (p[0] == 'y') {
225                                         sym->def[def].tri = yes;
226                                         sym->flags |= def_flags;
227                                         break;
228                                 }
229                                 if (p[0] == 'n') {
230                                         sym->def[def].tri = no;
231                                         sym->flags |= def_flags;
232                                         break;
233                                 }
234                                 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
235                                 break;
236                         case S_OTHER:
237                                 if (*p != '"') {
238                                         for (p2 = p; *p2 && !isspace(*p2); p2++)
239                                                 ;
240                                         sym->type = S_STRING;
241                                         goto done;
242                                 }
243                         case S_STRING:
244                                 if (*p++ != '"')
245                                         break;
246                                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
247                                         if (*p2 == '"') {
248                                                 *p2 = 0;
249                                                 break;
250                                         }
251                                         memmove(p2, p2 + 1, strlen(p2));
252                                 }
253                                 if (!p2) {
254                                         conf_warning("invalid string found");
255                                         continue;
256                                 }
257                         case S_INT:
258                         case S_HEX:
259                         done:
260                                 if (sym_string_valid(sym, p)) {
261                                         sym->def[def].val = strdup(p);
262                                         sym->flags |= def_flags;
263                                 } else {
264                                         conf_warning("symbol value '%s' invalid for %s", p, sym->name);
265                                         continue;
266                                 }
267                                 break;
268                         default:
269                                 ;
270                         }
271                         break;
272                 case '\r':
273                 case '\n':
274                         break;
275                 default:
276                         conf_warning("unexpected data");
277                         continue;
278                 }
279                 if (sym && sym_is_choice_value(sym)) {
280                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
281                         switch (sym->def[def].tri) {
282                         case no:
283                                 break;
284                         case mod:
285                                 if (cs->def[def].tri == yes) {
286                                         conf_warning("%s creates inconsistent choice state", sym->name);
287                                         cs->flags &= ~def_flags;
288                                 }
289                                 break;
290                         case yes:
291                                 if (cs->def[def].tri != no) {
292                                         conf_warning("%s creates inconsistent choice state", sym->name);
293                                         cs->flags &= ~def_flags;
294                                 } else
295                                         cs->def[def].val = sym;
296                                 break;
297                         }
298                         cs->def[def].tri = E_OR(cs->def[def].tri, sym->def[def].tri);
299                 }
300         }
301         fclose(in);
302
303         if (modules_sym)
304                 sym_calc_value(modules_sym);
305         return 0;
306 }
307
308 int conf_read(const char *name)
309 {
310         struct symbol *sym;
311         struct property *prop;
312         struct expr *e;
313         int i, flags;
314
315         sym_set_change_count(0);
316
317         if (conf_read_simple(name, S_DEF_USER))
318                 return 1;
319
320         for_all_symbols(i, sym) {
321                 sym_calc_value(sym);
322                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
323                         goto sym_ok;
324                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
325                         /* check that calculated value agrees with saved value */
326                         switch (sym->type) {
327                         case S_BOOLEAN:
328                         case S_TRISTATE:
329                                 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
330                                         break;
331                                 if (!sym_is_choice(sym))
332                                         goto sym_ok;
333                         default:
334                                 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
335                                         goto sym_ok;
336                                 break;
337                         }
338                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
339                         /* no previous value and not saved */
340                         goto sym_ok;
341                 conf_unsaved++;
342                 /* maybe print value in verbose mode... */
343         sym_ok:
344                 if (!sym_is_choice(sym))
345                         continue;
346                 /* The choice symbol only has a set value (and thus is not new)
347                  * if all its visible childs have values.
348                  */
349                 prop = sym_get_choice_prop(sym);
350                 flags = sym->flags;
351                 for (e = prop->expr; e; e = e->left.expr)
352                         if (e->right.sym->visible != no)
353                                 flags &= e->right.sym->flags;
354                 sym->flags &= flags | ~SYMBOL_DEF_USER;
355         }
356
357         for_all_symbols(i, sym) {
358                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
359                         /* Reset values of generates values, so they'll appear
360                          * as new, if they should become visible, but that
361                          * doesn't quite work if the Kconfig and the saved
362                          * configuration disagree.
363                          */
364                         if (sym->visible == no && !conf_unsaved)
365                                 sym->flags &= ~SYMBOL_DEF_USER;
366                         switch (sym->type) {
367                         case S_STRING:
368                         case S_INT:
369                         case S_HEX:
370                                 /* Reset a string value if it's out of range */
371                                 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
372                                         break;
373                                 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
374                                 conf_unsaved++;
375                                 break;
376                         default:
377                                 break;
378                         }
379                 }
380         }
381
382         sym_add_change_count(conf_warnings || conf_unsaved);
383
384         return 0;
385 }
386
387 int conf_write(const char *name)
388 {
389         FILE *out;
390         struct symbol *sym;
391         struct menu *menu;
392         const char *basename;
393         char dirname[128], tmpname[128], newname[128];
394         int type, l;
395         const char *str;
396         time_t now;
397         int use_timestamp = 1;
398         char *env;
399
400         dirname[0] = 0;
401         if (name && name[0]) {
402                 struct stat st;
403                 char *slash;
404
405                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
406                         strcpy(dirname, name);
407                         strcat(dirname, "/");
408                         basename = conf_get_configname();
409                 } else if ((slash = strrchr(name, '/'))) {
410                         int size = slash - name + 1;
411                         memcpy(dirname, name, size);
412                         dirname[size] = 0;
413                         if (slash[1])
414                                 basename = slash + 1;
415                         else
416                                 basename = conf_get_configname();
417                 } else
418                         basename = name;
419         } else
420                 basename = conf_get_configname();
421
422         sprintf(newname, "%s%s", dirname, basename);
423         env = getenv("KCONFIG_OVERWRITECONFIG");
424         if (!env || !*env) {
425                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
426                 out = fopen(tmpname, "w");
427         } else {
428                 *tmpname = 0;
429                 out = fopen(newname, "w");
430         }
431         if (!out)
432                 return 1;
433
434         sym = sym_lookup("KERNELVERSION", 0);
435         sym_calc_value(sym);
436         time(&now);
437         env = getenv("KCONFIG_NOTIMESTAMP");
438         if (env && *env)
439                 use_timestamp = 0;
440
441         fprintf(out, _("#\n"
442                        "# Automatically generated make config: don't edit\n"
443                        "# Linux kernel version: %s\n"
444                        "%s%s"
445                        "#\n"),
446                      sym_get_string_value(sym),
447                      use_timestamp ? "# " : "",
448                      use_timestamp ? ctime(&now) : "");
449
450         if (!conf_get_changed())
451                 sym_clear_all_valid();
452
453         menu = rootmenu.list;
454         while (menu) {
455                 sym = menu->sym;
456                 if (!sym) {
457                         if (!menu_is_visible(menu))
458                                 goto next;
459                         str = menu_get_prompt(menu);
460                         fprintf(out, "\n"
461                                      "#\n"
462                                      "# %s\n"
463                                      "#\n", str);
464                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
465                         sym_calc_value(sym);
466                         if (!(sym->flags & SYMBOL_WRITE))
467                                 goto next;
468                         sym->flags &= ~SYMBOL_WRITE;
469                         type = sym->type;
470                         if (type == S_TRISTATE) {
471                                 sym_calc_value(modules_sym);
472                                 if (modules_sym->curr.tri == no)
473                                         type = S_BOOLEAN;
474                         }
475                         switch (type) {
476                         case S_BOOLEAN:
477                         case S_TRISTATE:
478                                 switch (sym_get_tristate_value(sym)) {
479                                 case no:
480                                         fprintf(out, "# CONFIG_%s is not set\n", sym->name);
481                                         break;
482                                 case mod:
483                                         fprintf(out, "CONFIG_%s=m\n", sym->name);
484                                         break;
485                                 case yes:
486                                         fprintf(out, "CONFIG_%s=y\n", sym->name);
487                                         break;
488                                 }
489                                 break;
490                         case S_STRING:
491                                 str = sym_get_string_value(sym);
492                                 fprintf(out, "CONFIG_%s=\"", sym->name);
493                                 while (1) {
494                                         l = strcspn(str, "\"\\");
495                                         if (l) {
496                                                 fwrite(str, l, 1, out);
497                                                 str += l;
498                                         }
499                                         if (!*str)
500                                                 break;
501                                         fprintf(out, "\\%c", *str++);
502                                 }
503                                 fputs("\"\n", out);
504                                 break;
505                         case S_HEX:
506                                 str = sym_get_string_value(sym);
507                                 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
508                                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
509                                         break;
510                                 }
511                         case S_INT:
512                                 str = sym_get_string_value(sym);
513                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
514                                 break;
515                         }
516                 }
517
518         next:
519                 if (menu->list) {
520                         menu = menu->list;
521                         continue;
522                 }
523                 if (menu->next)
524                         menu = menu->next;
525                 else while ((menu = menu->parent)) {
526                         if (menu->next) {
527                                 menu = menu->next;
528                                 break;
529                         }
530                 }
531         }
532         fclose(out);
533
534         if (*tmpname) {
535                 strcat(dirname, basename);
536                 strcat(dirname, ".old");
537                 rename(newname, dirname);
538                 if (rename(tmpname, newname))
539                         return 1;
540         }
541
542         printf(_("#\n"
543                  "# configuration written to %s\n"
544                  "#\n"), newname);
545
546         sym_set_change_count(0);
547
548         return 0;
549 }
550
551 int conf_split_config(void)
552 {
553         char *name, path[128];
554         char *s, *d, c;
555         struct symbol *sym;
556         struct stat sb;
557         int res, i, fd;
558
559         name = getenv("KCONFIG_AUTOCONFIG");
560         if (!name)
561                 name = "include/config/auto.conf";
562         conf_read_simple(name, S_DEF_AUTO);
563
564         if (chdir("include/config"))
565                 return 1;
566
567         res = 0;
568         for_all_symbols(i, sym) {
569                 sym_calc_value(sym);
570                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
571                         continue;
572                 if (sym->flags & SYMBOL_WRITE) {
573                         if (sym->flags & SYMBOL_DEF_AUTO) {
574                                 /*
575                                  * symbol has old and new value,
576                                  * so compare them...
577                                  */
578                                 switch (sym->type) {
579                                 case S_BOOLEAN:
580                                 case S_TRISTATE:
581                                         if (sym_get_tristate_value(sym) ==
582                                             sym->def[S_DEF_AUTO].tri)
583                                                 continue;
584                                         break;
585                                 case S_STRING:
586                                 case S_HEX:
587                                 case S_INT:
588                                         if (!strcmp(sym_get_string_value(sym),
589                                                     sym->def[S_DEF_AUTO].val))
590                                                 continue;
591                                         break;
592                                 default:
593                                         break;
594                                 }
595                         } else {
596                                 /*
597                                  * If there is no old value, only 'no' (unset)
598                                  * is allowed as new value.
599                                  */
600                                 switch (sym->type) {
601                                 case S_BOOLEAN:
602                                 case S_TRISTATE:
603                                         if (sym_get_tristate_value(sym) == no)
604                                                 continue;
605                                         break;
606                                 default:
607                                         break;
608                                 }
609                         }
610                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
611                         /* There is neither an old nor a new value. */
612                         continue;
613                 /* else
614                  *      There is an old value, but no new value ('no' (unset)
615                  *      isn't saved in auto.conf, so the old value is always
616                  *      different from 'no').
617                  */
618
619                 /* Replace all '_' and append ".h" */
620                 s = sym->name;
621                 d = path;
622                 while ((c = *s++)) {
623                         c = tolower(c);
624                         *d++ = (c == '_') ? '/' : c;
625                 }
626                 strcpy(d, ".h");
627
628                 /* Assume directory path already exists. */
629                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
630                 if (fd == -1) {
631                         if (errno != ENOENT) {
632                                 res = 1;
633                                 break;
634                         }
635                         /*
636                          * Create directory components,
637                          * unless they exist already.
638                          */
639                         d = path;
640                         while ((d = strchr(d, '/'))) {
641                                 *d = 0;
642                                 if (stat(path, &sb) && mkdir(path, 0755)) {
643                                         res = 1;
644                                         goto out;
645                                 }
646                                 *d++ = '/';
647                         }
648                         /* Try it again. */
649                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
650                         if (fd == -1) {
651                                 res = 1;
652                                 break;
653                         }
654                 }
655                 close(fd);
656         }
657 out:
658         if (chdir("../.."))
659                 return 1;
660
661         return res;
662 }
663
664 int conf_write_autoconf(void)
665 {
666         struct symbol *sym;
667         const char *str;
668         char *name;
669         FILE *out, *out_h;
670         time_t now;
671         int i, l;
672
673         sym_clear_all_valid();
674
675         file_write_dep("include/config/auto.conf.cmd");
676
677         if (conf_split_config())
678                 return 1;
679
680         out = fopen(".tmpconfig", "w");
681         if (!out)
682                 return 1;
683
684         out_h = fopen(".tmpconfig.h", "w");
685         if (!out_h) {
686                 fclose(out);
687                 return 1;
688         }
689
690         sym = sym_lookup("KERNELVERSION", 0);
691         sym_calc_value(sym);
692         time(&now);
693         fprintf(out, "#\n"
694                      "# Automatically generated make config: don't edit\n"
695                      "# Linux kernel version: %s\n"
696                      "# %s"
697                      "#\n",
698                      sym_get_string_value(sym), ctime(&now));
699         fprintf(out_h, "/*\n"
700                        " * Automatically generated C config: don't edit\n"
701                        " * Linux kernel version: %s\n"
702                        " * %s"
703                        " */\n"
704                        "#define AUTOCONF_INCLUDED\n",
705                        sym_get_string_value(sym), ctime(&now));
706
707         for_all_symbols(i, sym) {
708                 sym_calc_value(sym);
709                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
710                         continue;
711                 switch (sym->type) {
712                 case S_BOOLEAN:
713                 case S_TRISTATE:
714                         switch (sym_get_tristate_value(sym)) {
715                         case no:
716                                 break;
717                         case mod:
718                                 fprintf(out, "CONFIG_%s=m\n", sym->name);
719                                 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
720                                 break;
721                         case yes:
722                                 fprintf(out, "CONFIG_%s=y\n", sym->name);
723                                 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
724                                 break;
725                         }
726                         break;
727                 case S_STRING:
728                         str = sym_get_string_value(sym);
729                         fprintf(out, "CONFIG_%s=\"", sym->name);
730                         fprintf(out_h, "#define CONFIG_%s \"", sym->name);
731                         while (1) {
732                                 l = strcspn(str, "\"\\");
733                                 if (l) {
734                                         fwrite(str, l, 1, out);
735                                         fwrite(str, l, 1, out_h);
736                                         str += l;
737                                 }
738                                 if (!*str)
739                                         break;
740                                 fprintf(out, "\\%c", *str);
741                                 fprintf(out_h, "\\%c", *str);
742                                 str++;
743                         }
744                         fputs("\"\n", out);
745                         fputs("\"\n", out_h);
746                         break;
747                 case S_HEX:
748                         str = sym_get_string_value(sym);
749                         if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
750                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
751                                 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
752                                 break;
753                         }
754                 case S_INT:
755                         str = sym_get_string_value(sym);
756                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
757                         fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
758                         break;
759                 default:
760                         break;
761                 }
762         }
763         fclose(out);
764         fclose(out_h);
765
766         name = getenv("KCONFIG_AUTOHEADER");
767         if (!name)
768                 name = "include/linux/autoconf.h";
769         if (rename(".tmpconfig.h", name))
770                 return 1;
771         name = getenv("KCONFIG_AUTOCONFIG");
772         if (!name)
773                 name = "include/config/auto.conf";
774         /*
775          * This must be the last step, kbuild has a dependency on auto.conf
776          * and this marks the successful completion of the previous steps.
777          */
778         if (rename(".tmpconfig", name))
779                 return 1;
780
781         return 0;
782 }
783
784 static int sym_change_count;
785 static void (*conf_changed_callback)(void);
786
787 void sym_set_change_count(int count)
788 {
789         int _sym_change_count = sym_change_count;
790         sym_change_count = count;
791         if (conf_changed_callback &&
792             (bool)_sym_change_count != (bool)count)
793                 conf_changed_callback();
794 }
795
796 void sym_add_change_count(int count)
797 {
798         sym_set_change_count(count + sym_change_count);
799 }
800
801 bool conf_get_changed(void)
802 {
803         return sym_change_count;
804 }
805
806 void conf_set_changed_callback(void (*fn)(void))
807 {
808         conf_changed_callback = fn;
809 }