kconfig: fix randconfig for choice blocks
[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 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
87 {
88         char *p2;
89
90         switch (sym->type) {
91         case S_TRISTATE:
92                 if (p[0] == 'm') {
93                         sym->def[def].tri = mod;
94                         sym->flags |= def_flags;
95                         break;
96                 }
97         case S_BOOLEAN:
98                 if (p[0] == 'y') {
99                         sym->def[def].tri = yes;
100                         sym->flags |= def_flags;
101                         break;
102                 }
103                 if (p[0] == 'n') {
104                         sym->def[def].tri = no;
105                         sym->flags |= def_flags;
106                         break;
107                 }
108                 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
109                 break;
110         case S_OTHER:
111                 if (*p != '"') {
112                         for (p2 = p; *p2 && !isspace(*p2); p2++)
113                                 ;
114                         sym->type = S_STRING;
115                         goto done;
116                 }
117         case S_STRING:
118                 if (*p++ != '"')
119                         break;
120                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
121                         if (*p2 == '"') {
122                                 *p2 = 0;
123                                 break;
124                         }
125                         memmove(p2, p2 + 1, strlen(p2));
126                 }
127                 if (!p2) {
128                         conf_warning("invalid string found");
129                         return 1;
130                 }
131         case S_INT:
132         case S_HEX:
133         done:
134                 if (sym_string_valid(sym, p)) {
135                         sym->def[def].val = strdup(p);
136                         sym->flags |= def_flags;
137                 } else {
138                         conf_warning("symbol value '%s' invalid for %s", p, sym->name);
139                         return 1;
140                 }
141                 break;
142         default:
143                 ;
144         }
145         return 0;
146 }
147
148 int conf_read_simple(const char *name, int def)
149 {
150         FILE *in = NULL;
151         char line[1024];
152         char *p, *p2;
153         struct symbol *sym;
154         int i, def_flags;
155
156         if (name) {
157                 in = zconf_fopen(name);
158         } else {
159                 struct property *prop;
160
161                 name = conf_get_configname();
162                 in = zconf_fopen(name);
163                 if (in)
164                         goto load;
165                 sym_add_change_count(1);
166                 if (!sym_defconfig_list)
167                         return 1;
168
169                 for_all_defaults(sym_defconfig_list, prop) {
170                         if (expr_calc_value(prop->visible.expr) == no ||
171                             prop->expr->type != E_SYMBOL)
172                                 continue;
173                         name = conf_expand_value(prop->expr->left.sym->name);
174                         in = zconf_fopen(name);
175                         if (in) {
176                                 printf(_("#\n"
177                                          "# using defaults found in %s\n"
178                                          "#\n"), name);
179                                 goto load;
180                         }
181                 }
182         }
183         if (!in)
184                 return 1;
185
186 load:
187         conf_filename = name;
188         conf_lineno = 0;
189         conf_warnings = 0;
190         conf_unsaved = 0;
191
192         def_flags = SYMBOL_DEF << def;
193         for_all_symbols(i, sym) {
194                 sym->flags |= SYMBOL_CHANGED;
195                 sym->flags &= ~(def_flags|SYMBOL_VALID);
196                 if (sym_is_choice(sym))
197                         sym->flags |= def_flags;
198                 switch (sym->type) {
199                 case S_INT:
200                 case S_HEX:
201                 case S_STRING:
202                         if (sym->def[def].val)
203                                 free(sym->def[def].val);
204                 default:
205                         sym->def[def].val = NULL;
206                         sym->def[def].tri = no;
207                 }
208         }
209
210         while (fgets(line, sizeof(line), in)) {
211                 conf_lineno++;
212                 sym = NULL;
213                 switch (line[0]) {
214                 case '#':
215                         if (memcmp(line + 2, "CONFIG_", 7))
216                                 continue;
217                         p = strchr(line + 9, ' ');
218                         if (!p)
219                                 continue;
220                         *p++ = 0;
221                         if (strncmp(p, "is not set", 10))
222                                 continue;
223                         if (def == S_DEF_USER) {
224                                 sym = sym_find(line + 9);
225                                 if (!sym) {
226                                         sym_add_change_count(1);
227                                         break;
228                                 }
229                         } else {
230                                 sym = sym_lookup(line + 9, 0);
231                                 if (sym->type == S_UNKNOWN)
232                                         sym->type = S_BOOLEAN;
233                         }
234                         if (sym->flags & def_flags) {
235                                 conf_warning("override: reassigning to symbol %s", sym->name);
236                         }
237                         switch (sym->type) {
238                         case S_BOOLEAN:
239                         case S_TRISTATE:
240                                 sym->def[def].tri = no;
241                                 sym->flags |= def_flags;
242                                 break;
243                         default:
244                                 ;
245                         }
246                         break;
247                 case 'C':
248                         if (memcmp(line, "CONFIG_", 7)) {
249                                 conf_warning("unexpected data");
250                                 continue;
251                         }
252                         p = strchr(line + 7, '=');
253                         if (!p)
254                                 continue;
255                         *p++ = 0;
256                         p2 = strchr(p, '\n');
257                         if (p2) {
258                                 *p2-- = 0;
259                                 if (*p2 == '\r')
260                                         *p2 = 0;
261                         }
262                         if (def == S_DEF_USER) {
263                                 sym = sym_find(line + 7);
264                                 if (!sym) {
265                                         sym_add_change_count(1);
266                                         break;
267                                 }
268                         } else {
269                                 sym = sym_lookup(line + 7, 0);
270                                 if (sym->type == S_UNKNOWN)
271                                         sym->type = S_OTHER;
272                         }
273                         if (sym->flags & def_flags) {
274                                 conf_warning("override: reassigning to symbol %s", sym->name);
275                         }
276                         if (conf_set_sym_val(sym, def, def_flags, p))
277                                 continue;
278                         break;
279                 case '\r':
280                 case '\n':
281                         break;
282                 default:
283                         conf_warning("unexpected data");
284                         continue;
285                 }
286                 if (sym && sym_is_choice_value(sym)) {
287                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
288                         switch (sym->def[def].tri) {
289                         case no:
290                                 break;
291                         case mod:
292                                 if (cs->def[def].tri == yes) {
293                                         conf_warning("%s creates inconsistent choice state", sym->name);
294                                         cs->flags &= ~def_flags;
295                                 }
296                                 break;
297                         case yes:
298                                 if (cs->def[def].tri != no)
299                                         conf_warning("override: %s changes choice state", sym->name);
300                                 cs->def[def].val = sym;
301                                 break;
302                         }
303                         cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
304                 }
305         }
306         fclose(in);
307
308         if (modules_sym)
309                 sym_calc_value(modules_sym);
310         return 0;
311 }
312
313 int conf_read(const char *name)
314 {
315         struct symbol *sym, *choice_sym;
316         struct property *prop;
317         struct expr *e;
318         int i, flags;
319
320         sym_set_change_count(0);
321
322         if (conf_read_simple(name, S_DEF_USER))
323                 return 1;
324
325         for_all_symbols(i, sym) {
326                 sym_calc_value(sym);
327                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
328                         goto sym_ok;
329                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
330                         /* check that calculated value agrees with saved value */
331                         switch (sym->type) {
332                         case S_BOOLEAN:
333                         case S_TRISTATE:
334                                 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
335                                         break;
336                                 if (!sym_is_choice(sym))
337                                         goto sym_ok;
338                         default:
339                                 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
340                                         goto sym_ok;
341                                 break;
342                         }
343                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
344                         /* no previous value and not saved */
345                         goto sym_ok;
346                 conf_unsaved++;
347                 /* maybe print value in verbose mode... */
348         sym_ok:
349                 if (!sym_is_choice(sym))
350                         continue;
351                 /* The choice symbol only has a set value (and thus is not new)
352                  * if all its visible childs have values.
353                  */
354                 prop = sym_get_choice_prop(sym);
355                 flags = sym->flags;
356                 expr_list_for_each_sym(prop->expr, e, choice_sym)
357                         if (choice_sym->visible != no)
358                                 flags &= choice_sym->flags;
359                 sym->flags &= flags | ~SYMBOL_DEF_USER;
360         }
361
362         for_all_symbols(i, sym) {
363                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
364                         /* Reset values of generates values, so they'll appear
365                          * as new, if they should become visible, but that
366                          * doesn't quite work if the Kconfig and the saved
367                          * configuration disagree.
368                          */
369                         if (sym->visible == no && !conf_unsaved)
370                                 sym->flags &= ~SYMBOL_DEF_USER;
371                         switch (sym->type) {
372                         case S_STRING:
373                         case S_INT:
374                         case S_HEX:
375                                 /* Reset a string value if it's out of range */
376                                 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
377                                         break;
378                                 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
379                                 conf_unsaved++;
380                                 break;
381                         default:
382                                 break;
383                         }
384                 }
385         }
386
387         sym_add_change_count(conf_warnings || conf_unsaved);
388
389         return 0;
390 }
391
392 int conf_write(const char *name)
393 {
394         FILE *out;
395         struct symbol *sym;
396         struct menu *menu;
397         const char *basename;
398         char dirname[128], tmpname[128], newname[128];
399         int type, l;
400         const char *str;
401         time_t now;
402         int use_timestamp = 1;
403         char *env;
404
405         dirname[0] = 0;
406         if (name && name[0]) {
407                 struct stat st;
408                 char *slash;
409
410                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
411                         strcpy(dirname, name);
412                         strcat(dirname, "/");
413                         basename = conf_get_configname();
414                 } else if ((slash = strrchr(name, '/'))) {
415                         int size = slash - name + 1;
416                         memcpy(dirname, name, size);
417                         dirname[size] = 0;
418                         if (slash[1])
419                                 basename = slash + 1;
420                         else
421                                 basename = conf_get_configname();
422                 } else
423                         basename = name;
424         } else
425                 basename = conf_get_configname();
426
427         sprintf(newname, "%s%s", dirname, basename);
428         env = getenv("KCONFIG_OVERWRITECONFIG");
429         if (!env || !*env) {
430                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
431                 out = fopen(tmpname, "w");
432         } else {
433                 *tmpname = 0;
434                 out = fopen(newname, "w");
435         }
436         if (!out)
437                 return 1;
438
439         sym = sym_lookup("KERNELVERSION", 0);
440         sym_calc_value(sym);
441         time(&now);
442         env = getenv("KCONFIG_NOTIMESTAMP");
443         if (env && *env)
444                 use_timestamp = 0;
445
446         fprintf(out, _("#\n"
447                        "# Automatically generated make config: don't edit\n"
448                        "# Linux kernel version: %s\n"
449                        "%s%s"
450                        "#\n"),
451                      sym_get_string_value(sym),
452                      use_timestamp ? "# " : "",
453                      use_timestamp ? ctime(&now) : "");
454
455         if (!conf_get_changed())
456                 sym_clear_all_valid();
457
458         menu = rootmenu.list;
459         while (menu) {
460                 sym = menu->sym;
461                 if (!sym) {
462                         if (!menu_is_visible(menu))
463                                 goto next;
464                         str = menu_get_prompt(menu);
465                         fprintf(out, "\n"
466                                      "#\n"
467                                      "# %s\n"
468                                      "#\n", str);
469                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
470                         sym_calc_value(sym);
471                         if (!(sym->flags & SYMBOL_WRITE))
472                                 goto next;
473                         sym->flags &= ~SYMBOL_WRITE;
474                         type = sym->type;
475                         if (type == S_TRISTATE) {
476                                 sym_calc_value(modules_sym);
477                                 if (modules_sym->curr.tri == no)
478                                         type = S_BOOLEAN;
479                         }
480                         switch (type) {
481                         case S_BOOLEAN:
482                         case S_TRISTATE:
483                                 switch (sym_get_tristate_value(sym)) {
484                                 case no:
485                                         fprintf(out, "# CONFIG_%s is not set\n", sym->name);
486                                         break;
487                                 case mod:
488                                         fprintf(out, "CONFIG_%s=m\n", sym->name);
489                                         break;
490                                 case yes:
491                                         fprintf(out, "CONFIG_%s=y\n", sym->name);
492                                         break;
493                                 }
494                                 break;
495                         case S_STRING:
496                                 str = sym_get_string_value(sym);
497                                 fprintf(out, "CONFIG_%s=\"", sym->name);
498                                 while (1) {
499                                         l = strcspn(str, "\"\\");
500                                         if (l) {
501                                                 fwrite(str, l, 1, out);
502                                                 str += l;
503                                         }
504                                         if (!*str)
505                                                 break;
506                                         fprintf(out, "\\%c", *str++);
507                                 }
508                                 fputs("\"\n", out);
509                                 break;
510                         case S_HEX:
511                                 str = sym_get_string_value(sym);
512                                 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
513                                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
514                                         break;
515                                 }
516                         case S_INT:
517                                 str = sym_get_string_value(sym);
518                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
519                                 break;
520                         }
521                 }
522
523         next:
524                 if (menu->list) {
525                         menu = menu->list;
526                         continue;
527                 }
528                 if (menu->next)
529                         menu = menu->next;
530                 else while ((menu = menu->parent)) {
531                         if (menu->next) {
532                                 menu = menu->next;
533                                 break;
534                         }
535                 }
536         }
537         fclose(out);
538
539         if (*tmpname) {
540                 strcat(dirname, basename);
541                 strcat(dirname, ".old");
542                 rename(newname, dirname);
543                 if (rename(tmpname, newname))
544                         return 1;
545         }
546
547         printf(_("#\n"
548                  "# configuration written to %s\n"
549                  "#\n"), newname);
550
551         sym_set_change_count(0);
552
553         return 0;
554 }
555
556 int conf_split_config(void)
557 {
558         char *name, path[128];
559         char *s, *d, c;
560         struct symbol *sym;
561         struct stat sb;
562         int res, i, fd;
563
564         name = getenv("KCONFIG_AUTOCONFIG");
565         if (!name)
566                 name = "include/config/auto.conf";
567         conf_read_simple(name, S_DEF_AUTO);
568
569         if (chdir("include/config"))
570                 return 1;
571
572         res = 0;
573         for_all_symbols(i, sym) {
574                 sym_calc_value(sym);
575                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
576                         continue;
577                 if (sym->flags & SYMBOL_WRITE) {
578                         if (sym->flags & SYMBOL_DEF_AUTO) {
579                                 /*
580                                  * symbol has old and new value,
581                                  * so compare them...
582                                  */
583                                 switch (sym->type) {
584                                 case S_BOOLEAN:
585                                 case S_TRISTATE:
586                                         if (sym_get_tristate_value(sym) ==
587                                             sym->def[S_DEF_AUTO].tri)
588                                                 continue;
589                                         break;
590                                 case S_STRING:
591                                 case S_HEX:
592                                 case S_INT:
593                                         if (!strcmp(sym_get_string_value(sym),
594                                                     sym->def[S_DEF_AUTO].val))
595                                                 continue;
596                                         break;
597                                 default:
598                                         break;
599                                 }
600                         } else {
601                                 /*
602                                  * If there is no old value, only 'no' (unset)
603                                  * is allowed as new value.
604                                  */
605                                 switch (sym->type) {
606                                 case S_BOOLEAN:
607                                 case S_TRISTATE:
608                                         if (sym_get_tristate_value(sym) == no)
609                                                 continue;
610                                         break;
611                                 default:
612                                         break;
613                                 }
614                         }
615                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
616                         /* There is neither an old nor a new value. */
617                         continue;
618                 /* else
619                  *      There is an old value, but no new value ('no' (unset)
620                  *      isn't saved in auto.conf, so the old value is always
621                  *      different from 'no').
622                  */
623
624                 /* Replace all '_' and append ".h" */
625                 s = sym->name;
626                 d = path;
627                 while ((c = *s++)) {
628                         c = tolower(c);
629                         *d++ = (c == '_') ? '/' : c;
630                 }
631                 strcpy(d, ".h");
632
633                 /* Assume directory path already exists. */
634                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
635                 if (fd == -1) {
636                         if (errno != ENOENT) {
637                                 res = 1;
638                                 break;
639                         }
640                         /*
641                          * Create directory components,
642                          * unless they exist already.
643                          */
644                         d = path;
645                         while ((d = strchr(d, '/'))) {
646                                 *d = 0;
647                                 if (stat(path, &sb) && mkdir(path, 0755)) {
648                                         res = 1;
649                                         goto out;
650                                 }
651                                 *d++ = '/';
652                         }
653                         /* Try it again. */
654                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
655                         if (fd == -1) {
656                                 res = 1;
657                                 break;
658                         }
659                 }
660                 close(fd);
661         }
662 out:
663         if (chdir("../.."))
664                 return 1;
665
666         return res;
667 }
668
669 int conf_write_autoconf(void)
670 {
671         struct symbol *sym;
672         const char *str;
673         char *name;
674         FILE *out, *out_h;
675         time_t now;
676         int i, l;
677
678         sym_clear_all_valid();
679
680         file_write_dep("include/config/auto.conf.cmd");
681
682         if (conf_split_config())
683                 return 1;
684
685         out = fopen(".tmpconfig", "w");
686         if (!out)
687                 return 1;
688
689         out_h = fopen(".tmpconfig.h", "w");
690         if (!out_h) {
691                 fclose(out);
692                 return 1;
693         }
694
695         sym = sym_lookup("KERNELVERSION", 0);
696         sym_calc_value(sym);
697         time(&now);
698         fprintf(out, "#\n"
699                      "# Automatically generated make config: don't edit\n"
700                      "# Linux kernel version: %s\n"
701                      "# %s"
702                      "#\n",
703                      sym_get_string_value(sym), ctime(&now));
704         fprintf(out_h, "/*\n"
705                        " * Automatically generated C config: don't edit\n"
706                        " * Linux kernel version: %s\n"
707                        " * %s"
708                        " */\n"
709                        "#define AUTOCONF_INCLUDED\n",
710                        sym_get_string_value(sym), ctime(&now));
711
712         for_all_symbols(i, sym) {
713                 sym_calc_value(sym);
714                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
715                         continue;
716                 switch (sym->type) {
717                 case S_BOOLEAN:
718                 case S_TRISTATE:
719                         switch (sym_get_tristate_value(sym)) {
720                         case no:
721                                 break;
722                         case mod:
723                                 fprintf(out, "CONFIG_%s=m\n", sym->name);
724                                 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
725                                 break;
726                         case yes:
727                                 fprintf(out, "CONFIG_%s=y\n", sym->name);
728                                 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
729                                 break;
730                         }
731                         break;
732                 case S_STRING:
733                         str = sym_get_string_value(sym);
734                         fprintf(out, "CONFIG_%s=\"", sym->name);
735                         fprintf(out_h, "#define CONFIG_%s \"", sym->name);
736                         while (1) {
737                                 l = strcspn(str, "\"\\");
738                                 if (l) {
739                                         fwrite(str, l, 1, out);
740                                         fwrite(str, l, 1, out_h);
741                                         str += l;
742                                 }
743                                 if (!*str)
744                                         break;
745                                 fprintf(out, "\\%c", *str);
746                                 fprintf(out_h, "\\%c", *str);
747                                 str++;
748                         }
749                         fputs("\"\n", out);
750                         fputs("\"\n", out_h);
751                         break;
752                 case S_HEX:
753                         str = sym_get_string_value(sym);
754                         if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
755                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
756                                 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
757                                 break;
758                         }
759                 case S_INT:
760                         str = sym_get_string_value(sym);
761                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
762                         fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
763                         break;
764                 default:
765                         break;
766                 }
767         }
768         fclose(out);
769         fclose(out_h);
770
771         name = getenv("KCONFIG_AUTOHEADER");
772         if (!name)
773                 name = "include/linux/autoconf.h";
774         if (rename(".tmpconfig.h", name))
775                 return 1;
776         name = getenv("KCONFIG_AUTOCONFIG");
777         if (!name)
778                 name = "include/config/auto.conf";
779         /*
780          * This must be the last step, kbuild has a dependency on auto.conf
781          * and this marks the successful completion of the previous steps.
782          */
783         if (rename(".tmpconfig", name))
784                 return 1;
785
786         return 0;
787 }
788
789 static int sym_change_count;
790 static void (*conf_changed_callback)(void);
791
792 void sym_set_change_count(int count)
793 {
794         int _sym_change_count = sym_change_count;
795         sym_change_count = count;
796         if (conf_changed_callback &&
797             (bool)_sym_change_count != (bool)count)
798                 conf_changed_callback();
799 }
800
801 void sym_add_change_count(int count)
802 {
803         sym_set_change_count(count + sym_change_count);
804 }
805
806 bool conf_get_changed(void)
807 {
808         return sym_change_count;
809 }
810
811 void conf_set_changed_callback(void (*fn)(void))
812 {
813         conf_changed_callback = fn;
814 }
815
816
817 void conf_set_all_new_symbols(enum conf_def_mode mode)
818 {
819         struct symbol *sym, *csym;
820         struct property *prop;
821         struct expr *e;
822         int i, cnt, def;
823
824         for_all_symbols(i, sym) {
825                 if (sym_has_value(sym))
826                         continue;
827                 switch (sym_get_type(sym)) {
828                 case S_BOOLEAN:
829                 case S_TRISTATE:
830                         switch (mode) {
831                         case def_yes:
832                                 sym->def[S_DEF_USER].tri = yes;
833                                 break;
834                         case def_mod:
835                                 sym->def[S_DEF_USER].tri = mod;
836                                 break;
837                         case def_no:
838                                 sym->def[S_DEF_USER].tri = no;
839                                 break;
840                         case def_random:
841                                 sym->def[S_DEF_USER].tri = (tristate)(rand() % 3);
842                                 break;
843                         default:
844                                 continue;
845                         }
846                         if (!(sym_is_choice(sym) && mode == def_random))
847                                 sym->flags |= SYMBOL_DEF_USER;
848                         break;
849                 default:
850                         break;
851                 }
852
853         }
854
855         sym_clear_all_valid();
856
857         if (mode != def_random)
858                 return;
859         /*
860          * We have different type of choice blocks.
861          * If curr.tri equal to mod then we can select several
862          * choice symbols in one block.
863          * In this case we do nothing.
864          * If curr.tri equal yes then only one symbol can be
865          * selected in a choice block and we set it to yes,
866          * and the rest to no.
867          */
868         for_all_symbols(i, csym) {
869                 if (sym_has_value(csym) || !sym_is_choice(csym))
870                         continue;
871
872                 sym_calc_value(csym);
873
874                 if (csym->curr.tri != yes)
875                         continue;
876
877                 prop = sym_get_choice_prop(csym);
878
879                 /* count entries in choice block */
880                 cnt = 0;
881                 expr_list_for_each_sym(prop->expr, e, sym)
882                         cnt++;
883
884                 /*
885                  * find a random value and set it to yes,
886                  * set the rest to no so we have only one set
887                  */
888                 def = (rand() % cnt);
889
890                 cnt = 0;
891                 expr_list_for_each_sym(prop->expr, e, sym) {
892                         if (def == cnt++) {
893                                 sym->def[S_DEF_USER].tri = yes;
894                                 csym->def[S_DEF_USER].val = sym;
895                         }
896                         else {
897                                 sym->def[S_DEF_USER].tri = no;
898                         }
899                 }
900                 csym->flags |= SYMBOL_DEF_USER;
901                 /* clear VALID to get value calculated */
902                 csym->flags &= ~(SYMBOL_VALID);
903         }
904 }