Loading...
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 <ctype.h>
7#include <stdlib.h>
8#include <string.h>
9#include <regex.h>
10#include <sys/utsname.h>
11
12#include "lkc.h"
13
14struct symbol symbol_yes = {
15 .name = "y",
16 .curr = { "y", yes },
17 .flags = SYMBOL_CONST|SYMBOL_VALID,
18}, symbol_mod = {
19 .name = "m",
20 .curr = { "m", mod },
21 .flags = SYMBOL_CONST|SYMBOL_VALID,
22}, symbol_no = {
23 .name = "n",
24 .curr = { "n", no },
25 .flags = SYMBOL_CONST|SYMBOL_VALID,
26}, symbol_empty = {
27 .name = "",
28 .curr = { "", no },
29 .flags = SYMBOL_VALID,
30};
31
32struct symbol *sym_defconfig_list;
33struct symbol *modules_sym;
34tristate modules_val;
35
36struct expr *sym_env_list;
37
38static void sym_add_default(struct symbol *sym, const char *def)
39{
40 struct property *prop = prop_alloc(P_DEFAULT, sym);
41
42 prop->expr = expr_alloc_symbol(sym_lookup(def, SYMBOL_CONST));
43}
44
45void sym_init(void)
46{
47 struct symbol *sym;
48 struct utsname uts;
49 static bool inited = false;
50
51 if (inited)
52 return;
53 inited = true;
54
55 uname(&uts);
56
57 sym = sym_lookup("UNAME_RELEASE", 0);
58 sym->type = S_STRING;
59 sym->flags |= SYMBOL_AUTO;
60 sym_add_default(sym, uts.release);
61}
62
63enum symbol_type sym_get_type(struct symbol *sym)
64{
65 enum symbol_type type = sym->type;
66
67 if (type == S_TRISTATE) {
68 if (sym_is_choice_value(sym) && sym->visible == yes)
69 type = S_BOOLEAN;
70 else if (modules_val == no)
71 type = S_BOOLEAN;
72 }
73 return type;
74}
75
76const char *sym_type_name(enum symbol_type type)
77{
78 switch (type) {
79 case S_BOOLEAN:
80 return "boolean";
81 case S_TRISTATE:
82 return "tristate";
83 case S_INT:
84 return "integer";
85 case S_HEX:
86 return "hex";
87 case S_STRING:
88 return "string";
89 case S_UNKNOWN:
90 return "unknown";
91 case S_OTHER:
92 break;
93 }
94 return "???";
95}
96
97struct property *sym_get_choice_prop(struct symbol *sym)
98{
99 struct property *prop;
100
101 for_all_choices(sym, prop)
102 return prop;
103 return NULL;
104}
105
106struct property *sym_get_env_prop(struct symbol *sym)
107{
108 struct property *prop;
109
110 for_all_properties(sym, prop, P_ENV)
111 return prop;
112 return NULL;
113}
114
115static struct property *sym_get_default_prop(struct symbol *sym)
116{
117 struct property *prop;
118
119 for_all_defaults(sym, prop) {
120 prop->visible.tri = expr_calc_value(prop->visible.expr);
121 if (prop->visible.tri != no)
122 return prop;
123 }
124 return NULL;
125}
126
127static struct property *sym_get_range_prop(struct symbol *sym)
128{
129 struct property *prop;
130
131 for_all_properties(sym, prop, P_RANGE) {
132 prop->visible.tri = expr_calc_value(prop->visible.expr);
133 if (prop->visible.tri != no)
134 return prop;
135 }
136 return NULL;
137}
138
139static long long sym_get_range_val(struct symbol *sym, int base)
140{
141 sym_calc_value(sym);
142 switch (sym->type) {
143 case S_INT:
144 base = 10;
145 break;
146 case S_HEX:
147 base = 16;
148 break;
149 default:
150 break;
151 }
152 return strtoll(sym->curr.val, NULL, base);
153}
154
155static void sym_validate_range(struct symbol *sym)
156{
157 struct property *prop;
158 int base;
159 long long val, val2;
160 char str[64];
161
162 switch (sym->type) {
163 case S_INT:
164 base = 10;
165 break;
166 case S_HEX:
167 base = 16;
168 break;
169 default:
170 return;
171 }
172 prop = sym_get_range_prop(sym);
173 if (!prop)
174 return;
175 val = strtoll(sym->curr.val, NULL, base);
176 val2 = sym_get_range_val(prop->expr->left.sym, base);
177 if (val >= val2) {
178 val2 = sym_get_range_val(prop->expr->right.sym, base);
179 if (val <= val2)
180 return;
181 }
182 if (sym->type == S_INT)
183 sprintf(str, "%lld", val2);
184 else
185 sprintf(str, "0x%llx", val2);
186 sym->curr.val = strdup(str);
187}
188
189static void sym_set_changed(struct symbol *sym)
190{
191 struct property *prop;
192
193 sym->flags |= SYMBOL_CHANGED;
194 for (prop = sym->prop; prop; prop = prop->next) {
195 if (prop->menu)
196 prop->menu->flags |= MENU_CHANGED;
197 }
198}
199
200static void sym_set_all_changed(void)
201{
202 struct symbol *sym;
203 int i;
204
205 for_all_symbols(i, sym)
206 sym_set_changed(sym);
207}
208
209static void sym_calc_visibility(struct symbol *sym)
210{
211 struct property *prop;
212 tristate tri;
213
214 /* any prompt visible? */
215 tri = no;
216 for_all_prompts(sym, prop) {
217 prop->visible.tri = expr_calc_value(prop->visible.expr);
218 tri = EXPR_OR(tri, prop->visible.tri);
219 }
220 if (tri == mod && (sym->type != S_TRISTATE || modules_val == no))
221 tri = yes;
222 if (sym->visible != tri) {
223 sym->visible = tri;
224 sym_set_changed(sym);
225 }
226 if (sym_is_choice_value(sym))
227 return;
228 /* defaulting to "yes" if no explicit "depends on" are given */
229 tri = yes;
230 if (sym->dir_dep.expr)
231 tri = expr_calc_value(sym->dir_dep.expr);
232 if (tri == mod)
233 tri = yes;
234 if (sym->dir_dep.tri != tri) {
235 sym->dir_dep.tri = tri;
236 sym_set_changed(sym);
237 }
238 tri = no;
239 if (sym->rev_dep.expr)
240 tri = expr_calc_value(sym->rev_dep.expr);
241 if (tri == mod && sym_get_type(sym) == S_BOOLEAN)
242 tri = yes;
243 if (sym->rev_dep.tri != tri) {
244 sym->rev_dep.tri = tri;
245 sym_set_changed(sym);
246 }
247}
248
249/*
250 * Find the default symbol for a choice.
251 * First try the default values for the choice symbol
252 * Next locate the first visible choice value
253 * Return NULL if none was found
254 */
255struct symbol *sym_choice_default(struct symbol *sym)
256{
257 struct symbol *def_sym;
258 struct property *prop;
259 struct expr *e;
260
261 /* any of the defaults visible? */
262 for_all_defaults(sym, prop) {
263 prop->visible.tri = expr_calc_value(prop->visible.expr);
264 if (prop->visible.tri == no)
265 continue;
266 def_sym = prop_get_symbol(prop);
267 if (def_sym->visible != no)
268 return def_sym;
269 }
270
271 /* just get the first visible value */
272 prop = sym_get_choice_prop(sym);
273 expr_list_for_each_sym(prop->expr, e, def_sym)
274 if (def_sym->visible != no)
275 return def_sym;
276
277 /* failed to locate any defaults */
278 return NULL;
279}
280
281static struct symbol *sym_calc_choice(struct symbol *sym)
282{
283 struct symbol *def_sym;
284 struct property *prop;
285 struct expr *e;
286 int flags;
287
288 /* first calculate all choice values' visibilities */
289 flags = sym->flags;
290 prop = sym_get_choice_prop(sym);
291 expr_list_for_each_sym(prop->expr, e, def_sym) {
292 sym_calc_visibility(def_sym);
293 if (def_sym->visible != no)
294 flags &= def_sym->flags;
295 }
296
297 sym->flags &= flags | ~SYMBOL_DEF_USER;
298
299 /* is the user choice visible? */
300 def_sym = sym->def[S_DEF_USER].val;
301 if (def_sym && def_sym->visible != no)
302 return def_sym;
303
304 def_sym = sym_choice_default(sym);
305
306 if (def_sym == NULL)
307 /* no choice? reset tristate value */
308 sym->curr.tri = no;
309
310 return def_sym;
311}
312
313void sym_calc_value(struct symbol *sym)
314{
315 struct symbol_value newval, oldval;
316 struct property *prop;
317 struct expr *e;
318
319 if (!sym)
320 return;
321
322 if (sym->flags & SYMBOL_VALID)
323 return;
324
325 if (sym_is_choice_value(sym) &&
326 sym->flags & SYMBOL_NEED_SET_CHOICE_VALUES) {
327 sym->flags &= ~SYMBOL_NEED_SET_CHOICE_VALUES;
328 prop = sym_get_choice_prop(sym);
329 sym_calc_value(prop_get_symbol(prop));
330 }
331
332 sym->flags |= SYMBOL_VALID;
333
334 oldval = sym->curr;
335
336 switch (sym->type) {
337 case S_INT:
338 case S_HEX:
339 case S_STRING:
340 newval = symbol_empty.curr;
341 break;
342 case S_BOOLEAN:
343 case S_TRISTATE:
344 newval = symbol_no.curr;
345 break;
346 default:
347 sym->curr.val = sym->name;
348 sym->curr.tri = no;
349 return;
350 }
351 if (!sym_is_choice_value(sym))
352 sym->flags &= ~SYMBOL_WRITE;
353
354 sym_calc_visibility(sym);
355
356 /* set default if recursively called */
357 sym->curr = newval;
358
359 switch (sym_get_type(sym)) {
360 case S_BOOLEAN:
361 case S_TRISTATE:
362 if (sym_is_choice_value(sym) && sym->visible == yes) {
363 prop = sym_get_choice_prop(sym);
364 newval.tri = (prop_get_symbol(prop)->curr.val == sym) ? yes : no;
365 } else {
366 if (sym->visible != no) {
367 /* if the symbol is visible use the user value
368 * if available, otherwise try the default value
369 */
370 sym->flags |= SYMBOL_WRITE;
371 if (sym_has_value(sym)) {
372 newval.tri = EXPR_AND(sym->def[S_DEF_USER].tri,
373 sym->visible);
374 goto calc_newval;
375 }
376 }
377 if (sym->rev_dep.tri != no)
378 sym->flags |= SYMBOL_WRITE;
379 if (!sym_is_choice(sym)) {
380 prop = sym_get_default_prop(sym);
381 if (prop) {
382 sym->flags |= SYMBOL_WRITE;
383 newval.tri = EXPR_AND(expr_calc_value(prop->expr),
384 prop->visible.tri);
385 }
386 }
387 calc_newval:
388 if (sym->dir_dep.tri == no && sym->rev_dep.tri != no) {
389 struct expr *e;
390 e = expr_simplify_unmet_dep(sym->rev_dep.expr,
391 sym->dir_dep.expr);
392 fprintf(stderr, "warning: (");
393 expr_fprint(e, stderr);
394 fprintf(stderr, ") selects %s which has unmet direct dependencies (",
395 sym->name);
396 expr_fprint(sym->dir_dep.expr, stderr);
397 fprintf(stderr, ")\n");
398 expr_free(e);
399 }
400 newval.tri = EXPR_OR(newval.tri, sym->rev_dep.tri);
401 }
402 if (newval.tri == mod && sym_get_type(sym) == S_BOOLEAN)
403 newval.tri = yes;
404 break;
405 case S_STRING:
406 case S_HEX:
407 case S_INT:
408 if (sym->visible != no) {
409 sym->flags |= SYMBOL_WRITE;
410 if (sym_has_value(sym)) {
411 newval.val = sym->def[S_DEF_USER].val;
412 break;
413 }
414 }
415 prop = sym_get_default_prop(sym);
416 if (prop) {
417 struct symbol *ds = prop_get_symbol(prop);
418 if (ds) {
419 sym->flags |= SYMBOL_WRITE;
420 sym_calc_value(ds);
421 newval.val = ds->curr.val;
422 }
423 }
424 break;
425 default:
426 ;
427 }
428
429 sym->curr = newval;
430 if (sym_is_choice(sym) && newval.tri == yes)
431 sym->curr.val = sym_calc_choice(sym);
432 sym_validate_range(sym);
433
434 if (memcmp(&oldval, &sym->curr, sizeof(oldval))) {
435 sym_set_changed(sym);
436 if (modules_sym == sym) {
437 sym_set_all_changed();
438 modules_val = modules_sym->curr.tri;
439 }
440 }
441
442 if (sym_is_choice(sym)) {
443 struct symbol *choice_sym;
444
445 prop = sym_get_choice_prop(sym);
446 expr_list_for_each_sym(prop->expr, e, choice_sym) {
447 if ((sym->flags & SYMBOL_WRITE) &&
448 choice_sym->visible != no)
449 choice_sym->flags |= SYMBOL_WRITE;
450 if (sym->flags & SYMBOL_CHANGED)
451 sym_set_changed(choice_sym);
452 }
453 }
454
455 if (sym->flags & SYMBOL_AUTO)
456 sym->flags &= ~SYMBOL_WRITE;
457
458 if (sym->flags & SYMBOL_NEED_SET_CHOICE_VALUES)
459 set_all_choice_values(sym);
460}
461
462void sym_clear_all_valid(void)
463{
464 struct symbol *sym;
465 int i;
466
467 for_all_symbols(i, sym)
468 sym->flags &= ~SYMBOL_VALID;
469 sym_add_change_count(1);
470 sym_calc_value(modules_sym);
471}
472
473bool sym_tristate_within_range(struct symbol *sym, tristate val)
474{
475 int type = sym_get_type(sym);
476
477 if (sym->visible == no)
478 return false;
479
480 if (type != S_BOOLEAN && type != S_TRISTATE)
481 return false;
482
483 if (type == S_BOOLEAN && val == mod)
484 return false;
485 if (sym->visible <= sym->rev_dep.tri)
486 return false;
487 if (sym_is_choice_value(sym) && sym->visible == yes)
488 return val == yes;
489 return val >= sym->rev_dep.tri && val <= sym->visible;
490}
491
492bool sym_set_tristate_value(struct symbol *sym, tristate val)
493{
494 tristate oldval = sym_get_tristate_value(sym);
495
496 if (oldval != val && !sym_tristate_within_range(sym, val))
497 return false;
498
499 if (!(sym->flags & SYMBOL_DEF_USER)) {
500 sym->flags |= SYMBOL_DEF_USER;
501 sym_set_changed(sym);
502 }
503 /*
504 * setting a choice value also resets the new flag of the choice
505 * symbol and all other choice values.
506 */
507 if (sym_is_choice_value(sym) && val == yes) {
508 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
509 struct property *prop;
510 struct expr *e;
511
512 cs->def[S_DEF_USER].val = sym;
513 cs->flags |= SYMBOL_DEF_USER;
514 prop = sym_get_choice_prop(cs);
515 for (e = prop->expr; e; e = e->left.expr) {
516 if (e->right.sym->visible != no)
517 e->right.sym->flags |= SYMBOL_DEF_USER;
518 }
519 }
520
521 sym->def[S_DEF_USER].tri = val;
522 if (oldval != val)
523 sym_clear_all_valid();
524
525 return true;
526}
527
528tristate sym_toggle_tristate_value(struct symbol *sym)
529{
530 tristate oldval, newval;
531
532 oldval = newval = sym_get_tristate_value(sym);
533 do {
534 switch (newval) {
535 case no:
536 newval = mod;
537 break;
538 case mod:
539 newval = yes;
540 break;
541 case yes:
542 newval = no;
543 break;
544 }
545 if (sym_set_tristate_value(sym, newval))
546 break;
547 } while (oldval != newval);
548 return newval;
549}
550
551bool sym_string_valid(struct symbol *sym, const char *str)
552{
553 signed char ch;
554
555 switch (sym->type) {
556 case S_STRING:
557 return true;
558 case S_INT:
559 ch = *str++;
560 if (ch == '-')
561 ch = *str++;
562 if (!isdigit(ch))
563 return false;
564 if (ch == '0' && *str != 0)
565 return false;
566 while ((ch = *str++)) {
567 if (!isdigit(ch))
568 return false;
569 }
570 return true;
571 case S_HEX:
572 if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
573 str += 2;
574 ch = *str++;
575 do {
576 if (!isxdigit(ch))
577 return false;
578 } while ((ch = *str++));
579 return true;
580 case S_BOOLEAN:
581 case S_TRISTATE:
582 switch (str[0]) {
583 case 'y': case 'Y':
584 case 'm': case 'M':
585 case 'n': case 'N':
586 return true;
587 }
588 return false;
589 default:
590 return false;
591 }
592}
593
594bool sym_string_within_range(struct symbol *sym, const char *str)
595{
596 struct property *prop;
597 long long val;
598
599 switch (sym->type) {
600 case S_STRING:
601 return sym_string_valid(sym, str);
602 case S_INT:
603 if (!sym_string_valid(sym, str))
604 return false;
605 prop = sym_get_range_prop(sym);
606 if (!prop)
607 return true;
608 val = strtoll(str, NULL, 10);
609 return val >= sym_get_range_val(prop->expr->left.sym, 10) &&
610 val <= sym_get_range_val(prop->expr->right.sym, 10);
611 case S_HEX:
612 if (!sym_string_valid(sym, str))
613 return false;
614 prop = sym_get_range_prop(sym);
615 if (!prop)
616 return true;
617 val = strtoll(str, NULL, 16);
618 return val >= sym_get_range_val(prop->expr->left.sym, 16) &&
619 val <= sym_get_range_val(prop->expr->right.sym, 16);
620 case S_BOOLEAN:
621 case S_TRISTATE:
622 switch (str[0]) {
623 case 'y': case 'Y':
624 return sym_tristate_within_range(sym, yes);
625 case 'm': case 'M':
626 return sym_tristate_within_range(sym, mod);
627 case 'n': case 'N':
628 return sym_tristate_within_range(sym, no);
629 }
630 return false;
631 default:
632 return false;
633 }
634}
635
636bool sym_set_string_value(struct symbol *sym, const char *newval)
637{
638 const char *oldval;
639 char *val;
640 int size;
641
642 switch (sym->type) {
643 case S_BOOLEAN:
644 case S_TRISTATE:
645 switch (newval[0]) {
646 case 'y': case 'Y':
647 return sym_set_tristate_value(sym, yes);
648 case 'm': case 'M':
649 return sym_set_tristate_value(sym, mod);
650 case 'n': case 'N':
651 return sym_set_tristate_value(sym, no);
652 }
653 return false;
654 default:
655 ;
656 }
657
658 if (!sym_string_within_range(sym, newval))
659 return false;
660
661 if (!(sym->flags & SYMBOL_DEF_USER)) {
662 sym->flags |= SYMBOL_DEF_USER;
663 sym_set_changed(sym);
664 }
665
666 oldval = sym->def[S_DEF_USER].val;
667 size = strlen(newval) + 1;
668 if (sym->type == S_HEX && (newval[0] != '0' || (newval[1] != 'x' && newval[1] != 'X'))) {
669 size += 2;
670 sym->def[S_DEF_USER].val = val = xmalloc(size);
671 *val++ = '0';
672 *val++ = 'x';
673 } else if (!oldval || strcmp(oldval, newval))
674 sym->def[S_DEF_USER].val = val = xmalloc(size);
675 else
676 return true;
677
678 strcpy(val, newval);
679 free((void *)oldval);
680 sym_clear_all_valid();
681
682 return true;
683}
684
685/*
686 * Find the default value associated to a symbol.
687 * For tristate symbol handle the modules=n case
688 * in which case "m" becomes "y".
689 * If the symbol does not have any default then fallback
690 * to the fixed default values.
691 */
692const char *sym_get_string_default(struct symbol *sym)
693{
694 struct property *prop;
695 struct symbol *ds;
696 const char *str;
697 tristate val;
698
699 sym_calc_visibility(sym);
700 sym_calc_value(modules_sym);
701 val = symbol_no.curr.tri;
702 str = symbol_empty.curr.val;
703
704 /* If symbol has a default value look it up */
705 prop = sym_get_default_prop(sym);
706 if (prop != NULL) {
707 switch (sym->type) {
708 case S_BOOLEAN:
709 case S_TRISTATE:
710 /* The visibility may limit the value from yes => mod */
711 val = EXPR_AND(expr_calc_value(prop->expr), prop->visible.tri);
712 break;
713 default:
714 /*
715 * The following fails to handle the situation
716 * where a default value is further limited by
717 * the valid range.
718 */
719 ds = prop_get_symbol(prop);
720 if (ds != NULL) {
721 sym_calc_value(ds);
722 str = (const char *)ds->curr.val;
723 }
724 }
725 }
726
727 /* Handle select statements */
728 val = EXPR_OR(val, sym->rev_dep.tri);
729
730 /* transpose mod to yes if modules are not enabled */
731 if (val == mod)
732 if (!sym_is_choice_value(sym) && modules_sym->curr.tri == no)
733 val = yes;
734
735 /* transpose mod to yes if type is bool */
736 if (sym->type == S_BOOLEAN && val == mod)
737 val = yes;
738
739 switch (sym->type) {
740 case S_BOOLEAN:
741 case S_TRISTATE:
742 switch (val) {
743 case no: return "n";
744 case mod: return "m";
745 case yes: return "y";
746 }
747 case S_INT:
748 case S_HEX:
749 return str;
750 case S_STRING:
751 return str;
752 case S_OTHER:
753 case S_UNKNOWN:
754 break;
755 }
756 return "";
757}
758
759const char *sym_get_string_value(struct symbol *sym)
760{
761 tristate val;
762
763 switch (sym->type) {
764 case S_BOOLEAN:
765 case S_TRISTATE:
766 val = sym_get_tristate_value(sym);
767 switch (val) {
768 case no:
769 return "n";
770 case mod:
771 sym_calc_value(modules_sym);
772 return (modules_sym->curr.tri == no) ? "n" : "m";
773 case yes:
774 return "y";
775 }
776 break;
777 default:
778 ;
779 }
780 return (const char *)sym->curr.val;
781}
782
783bool sym_is_changable(struct symbol *sym)
784{
785 return sym->visible > sym->rev_dep.tri;
786}
787
788static unsigned strhash(const char *s)
789{
790 /* fnv32 hash */
791 unsigned hash = 2166136261U;
792 for (; *s; s++)
793 hash = (hash ^ *s) * 0x01000193;
794 return hash;
795}
796
797struct symbol *sym_lookup(const char *name, int flags)
798{
799 struct symbol *symbol;
800 char *new_name;
801 int hash;
802
803 if (name) {
804 if (name[0] && !name[1]) {
805 switch (name[0]) {
806 case 'y': return &symbol_yes;
807 case 'm': return &symbol_mod;
808 case 'n': return &symbol_no;
809 }
810 }
811 hash = strhash(name) % SYMBOL_HASHSIZE;
812
813 for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
814 if (symbol->name &&
815 !strcmp(symbol->name, name) &&
816 (flags ? symbol->flags & flags
817 : !(symbol->flags & (SYMBOL_CONST|SYMBOL_CHOICE))))
818 return symbol;
819 }
820 new_name = strdup(name);
821 } else {
822 new_name = NULL;
823 hash = 0;
824 }
825
826 symbol = xmalloc(sizeof(*symbol));
827 memset(symbol, 0, sizeof(*symbol));
828 symbol->name = new_name;
829 symbol->type = S_UNKNOWN;
830 symbol->flags |= flags;
831
832 symbol->next = symbol_hash[hash];
833 symbol_hash[hash] = symbol;
834
835 return symbol;
836}
837
838struct symbol *sym_find(const char *name)
839{
840 struct symbol *symbol = NULL;
841 int hash = 0;
842
843 if (!name)
844 return NULL;
845
846 if (name[0] && !name[1]) {
847 switch (name[0]) {
848 case 'y': return &symbol_yes;
849 case 'm': return &symbol_mod;
850 case 'n': return &symbol_no;
851 }
852 }
853 hash = strhash(name) % SYMBOL_HASHSIZE;
854
855 for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
856 if (symbol->name &&
857 !strcmp(symbol->name, name) &&
858 !(symbol->flags & SYMBOL_CONST))
859 break;
860 }
861
862 return symbol;
863}
864
865/*
866 * Expand symbol's names embedded in the string given in argument. Symbols'
867 * name to be expanded shall be prefixed by a '$'. Unknown symbol expands to
868 * the empty string.
869 */
870const char *sym_expand_string_value(const char *in)
871{
872 const char *src;
873 char *res;
874 size_t reslen;
875
876 reslen = strlen(in) + 1;
877 res = xmalloc(reslen);
878 res[0] = '\0';
879
880 while ((src = strchr(in, '$'))) {
881 char *p, name[SYMBOL_MAXLENGTH];
882 const char *symval = "";
883 struct symbol *sym;
884 size_t newlen;
885
886 strncat(res, in, src - in);
887 src++;
888
889 p = name;
890 while (isalnum(*src) || *src == '_')
891 *p++ = *src++;
892 *p = '\0';
893
894 sym = sym_find(name);
895 if (sym != NULL) {
896 sym_calc_value(sym);
897 symval = sym_get_string_value(sym);
898 }
899
900 newlen = strlen(res) + strlen(symval) + strlen(src) + 1;
901 if (newlen > reslen) {
902 reslen = newlen;
903 res = realloc(res, reslen);
904 }
905
906 strcat(res, symval);
907 in = src;
908 }
909 strcat(res, in);
910
911 return res;
912}
913
914const char *sym_escape_string_value(const char *in)
915{
916 const char *p;
917 size_t reslen;
918 char *res;
919 size_t l;
920
921 reslen = strlen(in) + strlen("\"\"") + 1;
922
923 p = in;
924 for (;;) {
925 l = strcspn(p, "\"\\");
926 p += l;
927
928 if (p[0] == '\0')
929 break;
930
931 reslen++;
932 p++;
933 }
934
935 res = xmalloc(reslen);
936 res[0] = '\0';
937
938 strcat(res, "\"");
939
940 p = in;
941 for (;;) {
942 l = strcspn(p, "\"\\");
943 strncat(res, p, l);
944 p += l;
945
946 if (p[0] == '\0')
947 break;
948
949 strcat(res, "\\");
950 strncat(res, p++, 1);
951 }
952
953 strcat(res, "\"");
954 return res;
955}
956
957struct sym_match {
958 struct symbol *sym;
959 off_t so, eo;
960};
961
962/* Compare matched symbols as thus:
963 * - first, symbols that match exactly
964 * - then, alphabetical sort
965 */
966static int sym_rel_comp(const void *sym1, const void *sym2)
967{
968 const struct sym_match *s1 = sym1;
969 const struct sym_match *s2 = sym2;
970 int exact1, exact2;
971
972 /* Exact match:
973 * - if matched length on symbol s1 is the length of that symbol,
974 * then this symbol should come first;
975 * - if matched length on symbol s2 is the length of that symbol,
976 * then this symbol should come first.
977 * Note: since the search can be a regexp, both symbols may match
978 * exactly; if this is the case, we can't decide which comes first,
979 * and we fallback to sorting alphabetically.
980 */
981 exact1 = (s1->eo - s1->so) == strlen(s1->sym->name);
982 exact2 = (s2->eo - s2->so) == strlen(s2->sym->name);
983 if (exact1 && !exact2)
984 return -1;
985 if (!exact1 && exact2)
986 return 1;
987
988 /* As a fallback, sort symbols alphabetically */
989 return strcmp(s1->sym->name, s2->sym->name);
990}
991
992struct symbol **sym_re_search(const char *pattern)
993{
994 struct symbol *sym, **sym_arr = NULL;
995 struct sym_match *sym_match_arr = NULL;
996 int i, cnt, size;
997 regex_t re;
998 regmatch_t match[1];
999
1000 cnt = size = 0;
1001 /* Skip if empty */
1002 if (strlen(pattern) == 0)
1003 return NULL;
1004 if (regcomp(&re, pattern, REG_EXTENDED|REG_ICASE))
1005 return NULL;
1006
1007 for_all_symbols(i, sym) {
1008 if (sym->flags & SYMBOL_CONST || !sym->name)
1009 continue;
1010 if (regexec(&re, sym->name, 1, match, 0))
1011 continue;
1012 if (cnt >= size) {
1013 void *tmp;
1014 size += 16;
1015 tmp = realloc(sym_match_arr, size * sizeof(struct sym_match));
1016 if (!tmp)
1017 goto sym_re_search_free;
1018 sym_match_arr = tmp;
1019 }
1020 sym_calc_value(sym);
1021 /* As regexec returned 0, we know we have a match, so
1022 * we can use match[0].rm_[se]o without further checks
1023 */
1024 sym_match_arr[cnt].so = match[0].rm_so;
1025 sym_match_arr[cnt].eo = match[0].rm_eo;
1026 sym_match_arr[cnt++].sym = sym;
1027 }
1028 if (sym_match_arr) {
1029 qsort(sym_match_arr, cnt, sizeof(struct sym_match), sym_rel_comp);
1030 sym_arr = malloc((cnt+1) * sizeof(struct symbol));
1031 if (!sym_arr)
1032 goto sym_re_search_free;
1033 for (i = 0; i < cnt; i++)
1034 sym_arr[i] = sym_match_arr[i].sym;
1035 sym_arr[cnt] = NULL;
1036 }
1037sym_re_search_free:
1038 /* sym_match_arr can be NULL if no match, but free(NULL) is OK */
1039 free(sym_match_arr);
1040 regfree(&re);
1041
1042 return sym_arr;
1043}
1044
1045/*
1046 * When we check for recursive dependencies we use a stack to save
1047 * current state so we can print out relevant info to user.
1048 * The entries are located on the call stack so no need to free memory.
1049 * Note insert() remove() must always match to properly clear the stack.
1050 */
1051static struct dep_stack {
1052 struct dep_stack *prev, *next;
1053 struct symbol *sym;
1054 struct property *prop;
1055 struct expr *expr;
1056} *check_top;
1057
1058static void dep_stack_insert(struct dep_stack *stack, struct symbol *sym)
1059{
1060 memset(stack, 0, sizeof(*stack));
1061 if (check_top)
1062 check_top->next = stack;
1063 stack->prev = check_top;
1064 stack->sym = sym;
1065 check_top = stack;
1066}
1067
1068static void dep_stack_remove(void)
1069{
1070 check_top = check_top->prev;
1071 if (check_top)
1072 check_top->next = NULL;
1073}
1074
1075/*
1076 * Called when we have detected a recursive dependency.
1077 * check_top point to the top of the stact so we use
1078 * the ->prev pointer to locate the bottom of the stack.
1079 */
1080static void sym_check_print_recursive(struct symbol *last_sym)
1081{
1082 struct dep_stack *stack;
1083 struct symbol *sym, *next_sym;
1084 struct menu *menu = NULL;
1085 struct property *prop;
1086 struct dep_stack cv_stack;
1087
1088 if (sym_is_choice_value(last_sym)) {
1089 dep_stack_insert(&cv_stack, last_sym);
1090 last_sym = prop_get_symbol(sym_get_choice_prop(last_sym));
1091 }
1092
1093 for (stack = check_top; stack != NULL; stack = stack->prev)
1094 if (stack->sym == last_sym)
1095 break;
1096 if (!stack) {
1097 fprintf(stderr, "unexpected recursive dependency error\n");
1098 return;
1099 }
1100
1101 for (; stack; stack = stack->next) {
1102 sym = stack->sym;
1103 next_sym = stack->next ? stack->next->sym : last_sym;
1104 prop = stack->prop;
1105 if (prop == NULL)
1106 prop = stack->sym->prop;
1107
1108 /* for choice values find the menu entry (used below) */
1109 if (sym_is_choice(sym) || sym_is_choice_value(sym)) {
1110 for (prop = sym->prop; prop; prop = prop->next) {
1111 menu = prop->menu;
1112 if (prop->menu)
1113 break;
1114 }
1115 }
1116 if (stack->sym == last_sym)
1117 fprintf(stderr, "%s:%d:error: recursive dependency detected!\n",
1118 prop->file->name, prop->lineno);
1119 fprintf(stderr, "For a resolution refer to Documentation/kbuild/kconfig-language.txt\n");
1120 fprintf(stderr, "subsection \"Kconfig recursive dependency limitations\"\n");
1121 if (stack->expr) {
1122 fprintf(stderr, "%s:%d:\tsymbol %s %s value contains %s\n",
1123 prop->file->name, prop->lineno,
1124 sym->name ? sym->name : "<choice>",
1125 prop_get_type_name(prop->type),
1126 next_sym->name ? next_sym->name : "<choice>");
1127 } else if (stack->prop) {
1128 fprintf(stderr, "%s:%d:\tsymbol %s depends on %s\n",
1129 prop->file->name, prop->lineno,
1130 sym->name ? sym->name : "<choice>",
1131 next_sym->name ? next_sym->name : "<choice>");
1132 } else if (sym_is_choice(sym)) {
1133 fprintf(stderr, "%s:%d:\tchoice %s contains symbol %s\n",
1134 menu->file->name, menu->lineno,
1135 sym->name ? sym->name : "<choice>",
1136 next_sym->name ? next_sym->name : "<choice>");
1137 } else if (sym_is_choice_value(sym)) {
1138 fprintf(stderr, "%s:%d:\tsymbol %s is part of choice %s\n",
1139 menu->file->name, menu->lineno,
1140 sym->name ? sym->name : "<choice>",
1141 next_sym->name ? next_sym->name : "<choice>");
1142 } else {
1143 fprintf(stderr, "%s:%d:\tsymbol %s is selected by %s\n",
1144 prop->file->name, prop->lineno,
1145 sym->name ? sym->name : "<choice>",
1146 next_sym->name ? next_sym->name : "<choice>");
1147 }
1148 }
1149
1150 if (check_top == &cv_stack)
1151 dep_stack_remove();
1152}
1153
1154static struct symbol *sym_check_expr_deps(struct expr *e)
1155{
1156 struct symbol *sym;
1157
1158 if (!e)
1159 return NULL;
1160 switch (e->type) {
1161 case E_OR:
1162 case E_AND:
1163 sym = sym_check_expr_deps(e->left.expr);
1164 if (sym)
1165 return sym;
1166 return sym_check_expr_deps(e->right.expr);
1167 case E_NOT:
1168 return sym_check_expr_deps(e->left.expr);
1169 case E_EQUAL:
1170 case E_GEQ:
1171 case E_GTH:
1172 case E_LEQ:
1173 case E_LTH:
1174 case E_UNEQUAL:
1175 sym = sym_check_deps(e->left.sym);
1176 if (sym)
1177 return sym;
1178 return sym_check_deps(e->right.sym);
1179 case E_SYMBOL:
1180 return sym_check_deps(e->left.sym);
1181 default:
1182 break;
1183 }
1184 printf("Oops! How to check %d?\n", e->type);
1185 return NULL;
1186}
1187
1188/* return NULL when dependencies are OK */
1189static struct symbol *sym_check_sym_deps(struct symbol *sym)
1190{
1191 struct symbol *sym2;
1192 struct property *prop;
1193 struct dep_stack stack;
1194
1195 dep_stack_insert(&stack, sym);
1196
1197 sym2 = sym_check_expr_deps(sym->rev_dep.expr);
1198 if (sym2)
1199 goto out;
1200
1201 for (prop = sym->prop; prop; prop = prop->next) {
1202 if (prop->type == P_CHOICE || prop->type == P_SELECT)
1203 continue;
1204 stack.prop = prop;
1205 sym2 = sym_check_expr_deps(prop->visible.expr);
1206 if (sym2)
1207 break;
1208 if (prop->type != P_DEFAULT || sym_is_choice(sym))
1209 continue;
1210 stack.expr = prop->expr;
1211 sym2 = sym_check_expr_deps(prop->expr);
1212 if (sym2)
1213 break;
1214 stack.expr = NULL;
1215 }
1216
1217out:
1218 dep_stack_remove();
1219
1220 return sym2;
1221}
1222
1223static struct symbol *sym_check_choice_deps(struct symbol *choice)
1224{
1225 struct symbol *sym, *sym2;
1226 struct property *prop;
1227 struct expr *e;
1228 struct dep_stack stack;
1229
1230 dep_stack_insert(&stack, choice);
1231
1232 prop = sym_get_choice_prop(choice);
1233 expr_list_for_each_sym(prop->expr, e, sym)
1234 sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
1235
1236 choice->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
1237 sym2 = sym_check_sym_deps(choice);
1238 choice->flags &= ~SYMBOL_CHECK;
1239 if (sym2)
1240 goto out;
1241
1242 expr_list_for_each_sym(prop->expr, e, sym) {
1243 sym2 = sym_check_sym_deps(sym);
1244 if (sym2)
1245 break;
1246 }
1247out:
1248 expr_list_for_each_sym(prop->expr, e, sym)
1249 sym->flags &= ~SYMBOL_CHECK;
1250
1251 if (sym2 && sym_is_choice_value(sym2) &&
1252 prop_get_symbol(sym_get_choice_prop(sym2)) == choice)
1253 sym2 = choice;
1254
1255 dep_stack_remove();
1256
1257 return sym2;
1258}
1259
1260struct symbol *sym_check_deps(struct symbol *sym)
1261{
1262 struct symbol *sym2;
1263 struct property *prop;
1264
1265 if (sym->flags & SYMBOL_CHECK) {
1266 sym_check_print_recursive(sym);
1267 return sym;
1268 }
1269 if (sym->flags & SYMBOL_CHECKED)
1270 return NULL;
1271
1272 if (sym_is_choice_value(sym)) {
1273 struct dep_stack stack;
1274
1275 /* for choice groups start the check with main choice symbol */
1276 dep_stack_insert(&stack, sym);
1277 prop = sym_get_choice_prop(sym);
1278 sym2 = sym_check_deps(prop_get_symbol(prop));
1279 dep_stack_remove();
1280 } else if (sym_is_choice(sym)) {
1281 sym2 = sym_check_choice_deps(sym);
1282 } else {
1283 sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
1284 sym2 = sym_check_sym_deps(sym);
1285 sym->flags &= ~SYMBOL_CHECK;
1286 }
1287
1288 if (sym2 && sym2 == sym)
1289 sym2 = NULL;
1290
1291 return sym2;
1292}
1293
1294struct property *prop_alloc(enum prop_type type, struct symbol *sym)
1295{
1296 struct property *prop;
1297 struct property **propp;
1298
1299 prop = xmalloc(sizeof(*prop));
1300 memset(prop, 0, sizeof(*prop));
1301 prop->type = type;
1302 prop->sym = sym;
1303 prop->file = current_file;
1304 prop->lineno = zconf_lineno();
1305
1306 /* append property to the prop list of symbol */
1307 if (sym) {
1308 for (propp = &sym->prop; *propp; propp = &(*propp)->next)
1309 ;
1310 *propp = prop;
1311 }
1312
1313 return prop;
1314}
1315
1316struct symbol *prop_get_symbol(struct property *prop)
1317{
1318 if (prop->expr && (prop->expr->type == E_SYMBOL ||
1319 prop->expr->type == E_LIST))
1320 return prop->expr->left.sym;
1321 return NULL;
1322}
1323
1324const char *prop_get_type_name(enum prop_type type)
1325{
1326 switch (type) {
1327 case P_PROMPT:
1328 return "prompt";
1329 case P_ENV:
1330 return "env";
1331 case P_COMMENT:
1332 return "comment";
1333 case P_MENU:
1334 return "menu";
1335 case P_DEFAULT:
1336 return "default";
1337 case P_CHOICE:
1338 return "choice";
1339 case P_SELECT:
1340 return "select";
1341 case P_RANGE:
1342 return "range";
1343 case P_SYMBOL:
1344 return "symbol";
1345 case P_UNKNOWN:
1346 break;
1347 }
1348 return "unknown";
1349}
1350
1351static void prop_add_env(const char *env)
1352{
1353 struct symbol *sym, *sym2;
1354 struct property *prop;
1355 char *p;
1356
1357 sym = current_entry->sym;
1358 sym->flags |= SYMBOL_AUTO;
1359 for_all_properties(sym, prop, P_ENV) {
1360 sym2 = prop_get_symbol(prop);
1361 if (strcmp(sym2->name, env))
1362 menu_warn(current_entry, "redefining environment symbol from %s",
1363 sym2->name);
1364 return;
1365 }
1366
1367 prop = prop_alloc(P_ENV, sym);
1368 prop->expr = expr_alloc_symbol(sym_lookup(env, SYMBOL_CONST));
1369
1370 sym_env_list = expr_alloc_one(E_LIST, sym_env_list);
1371 sym_env_list->right.sym = sym;
1372
1373 p = getenv(env);
1374 if (p)
1375 sym_add_default(sym, p);
1376 else
1377 menu_warn(current_entry, "environment variable %s undefined", env);
1378}
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 <ctype.h>
7#include <stdlib.h>
8#include <string.h>
9#include <regex.h>
10#include <sys/utsname.h>
11
12#include "lkc.h"
13
14struct symbol symbol_yes = {
15 .name = "y",
16 .curr = { "y", yes },
17 .flags = SYMBOL_CONST|SYMBOL_VALID,
18}, symbol_mod = {
19 .name = "m",
20 .curr = { "m", mod },
21 .flags = SYMBOL_CONST|SYMBOL_VALID,
22}, symbol_no = {
23 .name = "n",
24 .curr = { "n", no },
25 .flags = SYMBOL_CONST|SYMBOL_VALID,
26}, symbol_empty = {
27 .name = "",
28 .curr = { "", no },
29 .flags = SYMBOL_VALID,
30};
31
32struct symbol *sym_defconfig_list;
33struct symbol *modules_sym;
34tristate modules_val;
35
36struct expr *sym_env_list;
37
38static void sym_add_default(struct symbol *sym, const char *def)
39{
40 struct property *prop = prop_alloc(P_DEFAULT, sym);
41
42 prop->expr = expr_alloc_symbol(sym_lookup(def, SYMBOL_CONST));
43}
44
45void sym_init(void)
46{
47 struct symbol *sym;
48 struct utsname uts;
49 static bool inited = false;
50
51 if (inited)
52 return;
53 inited = true;
54
55 uname(&uts);
56
57 sym = sym_lookup("UNAME_RELEASE", 0);
58 sym->type = S_STRING;
59 sym->flags |= SYMBOL_AUTO;
60 sym_add_default(sym, uts.release);
61}
62
63enum symbol_type sym_get_type(struct symbol *sym)
64{
65 enum symbol_type type = sym->type;
66
67 if (type == S_TRISTATE) {
68 if (sym_is_choice_value(sym) && sym->visible == yes)
69 type = S_BOOLEAN;
70 else if (modules_val == no)
71 type = S_BOOLEAN;
72 }
73 return type;
74}
75
76const char *sym_type_name(enum symbol_type type)
77{
78 switch (type) {
79 case S_BOOLEAN:
80 return "boolean";
81 case S_TRISTATE:
82 return "tristate";
83 case S_INT:
84 return "integer";
85 case S_HEX:
86 return "hex";
87 case S_STRING:
88 return "string";
89 case S_UNKNOWN:
90 return "unknown";
91 case S_OTHER:
92 break;
93 }
94 return "???";
95}
96
97struct property *sym_get_choice_prop(struct symbol *sym)
98{
99 struct property *prop;
100
101 for_all_choices(sym, prop)
102 return prop;
103 return NULL;
104}
105
106struct property *sym_get_env_prop(struct symbol *sym)
107{
108 struct property *prop;
109
110 for_all_properties(sym, prop, P_ENV)
111 return prop;
112 return NULL;
113}
114
115struct property *sym_get_default_prop(struct symbol *sym)
116{
117 struct property *prop;
118
119 for_all_defaults(sym, prop) {
120 prop->visible.tri = expr_calc_value(prop->visible.expr);
121 if (prop->visible.tri != no)
122 return prop;
123 }
124 return NULL;
125}
126
127static struct property *sym_get_range_prop(struct symbol *sym)
128{
129 struct property *prop;
130
131 for_all_properties(sym, prop, P_RANGE) {
132 prop->visible.tri = expr_calc_value(prop->visible.expr);
133 if (prop->visible.tri != no)
134 return prop;
135 }
136 return NULL;
137}
138
139static int sym_get_range_val(struct symbol *sym, int base)
140{
141 sym_calc_value(sym);
142 switch (sym->type) {
143 case S_INT:
144 base = 10;
145 break;
146 case S_HEX:
147 base = 16;
148 break;
149 default:
150 break;
151 }
152 return strtol(sym->curr.val, NULL, base);
153}
154
155static void sym_validate_range(struct symbol *sym)
156{
157 struct property *prop;
158 int base, val, val2;
159 char str[64];
160
161 switch (sym->type) {
162 case S_INT:
163 base = 10;
164 break;
165 case S_HEX:
166 base = 16;
167 break;
168 default:
169 return;
170 }
171 prop = sym_get_range_prop(sym);
172 if (!prop)
173 return;
174 val = strtol(sym->curr.val, NULL, base);
175 val2 = sym_get_range_val(prop->expr->left.sym, base);
176 if (val >= val2) {
177 val2 = sym_get_range_val(prop->expr->right.sym, base);
178 if (val <= val2)
179 return;
180 }
181 if (sym->type == S_INT)
182 sprintf(str, "%d", val2);
183 else
184 sprintf(str, "0x%x", val2);
185 sym->curr.val = strdup(str);
186}
187
188static void sym_calc_visibility(struct symbol *sym)
189{
190 struct property *prop;
191 tristate tri;
192
193 /* any prompt visible? */
194 tri = no;
195 for_all_prompts(sym, prop) {
196 prop->visible.tri = expr_calc_value(prop->visible.expr);
197 tri = EXPR_OR(tri, prop->visible.tri);
198 }
199 if (tri == mod && (sym->type != S_TRISTATE || modules_val == no))
200 tri = yes;
201 if (sym->visible != tri) {
202 sym->visible = tri;
203 sym_set_changed(sym);
204 }
205 if (sym_is_choice_value(sym))
206 return;
207 /* defaulting to "yes" if no explicit "depends on" are given */
208 tri = yes;
209 if (sym->dir_dep.expr)
210 tri = expr_calc_value(sym->dir_dep.expr);
211 if (tri == mod)
212 tri = yes;
213 if (sym->dir_dep.tri != tri) {
214 sym->dir_dep.tri = tri;
215 sym_set_changed(sym);
216 }
217 tri = no;
218 if (sym->rev_dep.expr)
219 tri = expr_calc_value(sym->rev_dep.expr);
220 if (tri == mod && sym_get_type(sym) == S_BOOLEAN)
221 tri = yes;
222 if (sym->rev_dep.tri != tri) {
223 sym->rev_dep.tri = tri;
224 sym_set_changed(sym);
225 }
226}
227
228/*
229 * Find the default symbol for a choice.
230 * First try the default values for the choice symbol
231 * Next locate the first visible choice value
232 * Return NULL if none was found
233 */
234struct symbol *sym_choice_default(struct symbol *sym)
235{
236 struct symbol *def_sym;
237 struct property *prop;
238 struct expr *e;
239
240 /* any of the defaults visible? */
241 for_all_defaults(sym, prop) {
242 prop->visible.tri = expr_calc_value(prop->visible.expr);
243 if (prop->visible.tri == no)
244 continue;
245 def_sym = prop_get_symbol(prop);
246 if (def_sym->visible != no)
247 return def_sym;
248 }
249
250 /* just get the first visible value */
251 prop = sym_get_choice_prop(sym);
252 expr_list_for_each_sym(prop->expr, e, def_sym)
253 if (def_sym->visible != no)
254 return def_sym;
255
256 /* failed to locate any defaults */
257 return NULL;
258}
259
260static struct symbol *sym_calc_choice(struct symbol *sym)
261{
262 struct symbol *def_sym;
263 struct property *prop;
264 struct expr *e;
265 int flags;
266
267 /* first calculate all choice values' visibilities */
268 flags = sym->flags;
269 prop = sym_get_choice_prop(sym);
270 expr_list_for_each_sym(prop->expr, e, def_sym) {
271 sym_calc_visibility(def_sym);
272 if (def_sym->visible != no)
273 flags &= def_sym->flags;
274 }
275
276 sym->flags &= flags | ~SYMBOL_DEF_USER;
277
278 /* is the user choice visible? */
279 def_sym = sym->def[S_DEF_USER].val;
280 if (def_sym && def_sym->visible != no)
281 return def_sym;
282
283 def_sym = sym_choice_default(sym);
284
285 if (def_sym == NULL)
286 /* no choice? reset tristate value */
287 sym->curr.tri = no;
288
289 return def_sym;
290}
291
292void sym_calc_value(struct symbol *sym)
293{
294 struct symbol_value newval, oldval;
295 struct property *prop;
296 struct expr *e;
297
298 if (!sym)
299 return;
300
301 if (sym->flags & SYMBOL_VALID)
302 return;
303 sym->flags |= SYMBOL_VALID;
304
305 oldval = sym->curr;
306
307 switch (sym->type) {
308 case S_INT:
309 case S_HEX:
310 case S_STRING:
311 newval = symbol_empty.curr;
312 break;
313 case S_BOOLEAN:
314 case S_TRISTATE:
315 newval = symbol_no.curr;
316 break;
317 default:
318 sym->curr.val = sym->name;
319 sym->curr.tri = no;
320 return;
321 }
322 if (!sym_is_choice_value(sym))
323 sym->flags &= ~SYMBOL_WRITE;
324
325 sym_calc_visibility(sym);
326
327 /* set default if recursively called */
328 sym->curr = newval;
329
330 switch (sym_get_type(sym)) {
331 case S_BOOLEAN:
332 case S_TRISTATE:
333 if (sym_is_choice_value(sym) && sym->visible == yes) {
334 prop = sym_get_choice_prop(sym);
335 newval.tri = (prop_get_symbol(prop)->curr.val == sym) ? yes : no;
336 } else {
337 if (sym->visible != no) {
338 /* if the symbol is visible use the user value
339 * if available, otherwise try the default value
340 */
341 sym->flags |= SYMBOL_WRITE;
342 if (sym_has_value(sym)) {
343 newval.tri = EXPR_AND(sym->def[S_DEF_USER].tri,
344 sym->visible);
345 goto calc_newval;
346 }
347 }
348 if (sym->rev_dep.tri != no)
349 sym->flags |= SYMBOL_WRITE;
350 if (!sym_is_choice(sym)) {
351 prop = sym_get_default_prop(sym);
352 if (prop) {
353 sym->flags |= SYMBOL_WRITE;
354 newval.tri = EXPR_AND(expr_calc_value(prop->expr),
355 prop->visible.tri);
356 }
357 }
358 calc_newval:
359 if (sym->dir_dep.tri == no && sym->rev_dep.tri != no) {
360 struct expr *e;
361 e = expr_simplify_unmet_dep(sym->rev_dep.expr,
362 sym->dir_dep.expr);
363 fprintf(stderr, "warning: (");
364 expr_fprint(e, stderr);
365 fprintf(stderr, ") selects %s which has unmet direct dependencies (",
366 sym->name);
367 expr_fprint(sym->dir_dep.expr, stderr);
368 fprintf(stderr, ")\n");
369 expr_free(e);
370 }
371 newval.tri = EXPR_OR(newval.tri, sym->rev_dep.tri);
372 }
373 if (newval.tri == mod && sym_get_type(sym) == S_BOOLEAN)
374 newval.tri = yes;
375 break;
376 case S_STRING:
377 case S_HEX:
378 case S_INT:
379 if (sym->visible != no) {
380 sym->flags |= SYMBOL_WRITE;
381 if (sym_has_value(sym)) {
382 newval.val = sym->def[S_DEF_USER].val;
383 break;
384 }
385 }
386 prop = sym_get_default_prop(sym);
387 if (prop) {
388 struct symbol *ds = prop_get_symbol(prop);
389 if (ds) {
390 sym->flags |= SYMBOL_WRITE;
391 sym_calc_value(ds);
392 newval.val = ds->curr.val;
393 }
394 }
395 break;
396 default:
397 ;
398 }
399
400 sym->curr = newval;
401 if (sym_is_choice(sym) && newval.tri == yes)
402 sym->curr.val = sym_calc_choice(sym);
403 sym_validate_range(sym);
404
405 if (memcmp(&oldval, &sym->curr, sizeof(oldval))) {
406 sym_set_changed(sym);
407 if (modules_sym == sym) {
408 sym_set_all_changed();
409 modules_val = modules_sym->curr.tri;
410 }
411 }
412
413 if (sym_is_choice(sym)) {
414 struct symbol *choice_sym;
415
416 prop = sym_get_choice_prop(sym);
417 expr_list_for_each_sym(prop->expr, e, choice_sym) {
418 if ((sym->flags & SYMBOL_WRITE) &&
419 choice_sym->visible != no)
420 choice_sym->flags |= SYMBOL_WRITE;
421 if (sym->flags & SYMBOL_CHANGED)
422 sym_set_changed(choice_sym);
423 }
424 }
425
426 if (sym->flags & SYMBOL_AUTO)
427 sym->flags &= ~SYMBOL_WRITE;
428}
429
430void sym_clear_all_valid(void)
431{
432 struct symbol *sym;
433 int i;
434
435 for_all_symbols(i, sym)
436 sym->flags &= ~SYMBOL_VALID;
437 sym_add_change_count(1);
438 if (modules_sym)
439 sym_calc_value(modules_sym);
440}
441
442void sym_set_changed(struct symbol *sym)
443{
444 struct property *prop;
445
446 sym->flags |= SYMBOL_CHANGED;
447 for (prop = sym->prop; prop; prop = prop->next) {
448 if (prop->menu)
449 prop->menu->flags |= MENU_CHANGED;
450 }
451}
452
453void sym_set_all_changed(void)
454{
455 struct symbol *sym;
456 int i;
457
458 for_all_symbols(i, sym)
459 sym_set_changed(sym);
460}
461
462bool sym_tristate_within_range(struct symbol *sym, tristate val)
463{
464 int type = sym_get_type(sym);
465
466 if (sym->visible == no)
467 return false;
468
469 if (type != S_BOOLEAN && type != S_TRISTATE)
470 return false;
471
472 if (type == S_BOOLEAN && val == mod)
473 return false;
474 if (sym->visible <= sym->rev_dep.tri)
475 return false;
476 if (sym_is_choice_value(sym) && sym->visible == yes)
477 return val == yes;
478 return val >= sym->rev_dep.tri && val <= sym->visible;
479}
480
481bool sym_set_tristate_value(struct symbol *sym, tristate val)
482{
483 tristate oldval = sym_get_tristate_value(sym);
484
485 if (oldval != val && !sym_tristate_within_range(sym, val))
486 return false;
487
488 if (!(sym->flags & SYMBOL_DEF_USER)) {
489 sym->flags |= SYMBOL_DEF_USER;
490 sym_set_changed(sym);
491 }
492 /*
493 * setting a choice value also resets the new flag of the choice
494 * symbol and all other choice values.
495 */
496 if (sym_is_choice_value(sym) && val == yes) {
497 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
498 struct property *prop;
499 struct expr *e;
500
501 cs->def[S_DEF_USER].val = sym;
502 cs->flags |= SYMBOL_DEF_USER;
503 prop = sym_get_choice_prop(cs);
504 for (e = prop->expr; e; e = e->left.expr) {
505 if (e->right.sym->visible != no)
506 e->right.sym->flags |= SYMBOL_DEF_USER;
507 }
508 }
509
510 sym->def[S_DEF_USER].tri = val;
511 if (oldval != val)
512 sym_clear_all_valid();
513
514 return true;
515}
516
517tristate sym_toggle_tristate_value(struct symbol *sym)
518{
519 tristate oldval, newval;
520
521 oldval = newval = sym_get_tristate_value(sym);
522 do {
523 switch (newval) {
524 case no:
525 newval = mod;
526 break;
527 case mod:
528 newval = yes;
529 break;
530 case yes:
531 newval = no;
532 break;
533 }
534 if (sym_set_tristate_value(sym, newval))
535 break;
536 } while (oldval != newval);
537 return newval;
538}
539
540bool sym_string_valid(struct symbol *sym, const char *str)
541{
542 signed char ch;
543
544 switch (sym->type) {
545 case S_STRING:
546 return true;
547 case S_INT:
548 ch = *str++;
549 if (ch == '-')
550 ch = *str++;
551 if (!isdigit(ch))
552 return false;
553 if (ch == '0' && *str != 0)
554 return false;
555 while ((ch = *str++)) {
556 if (!isdigit(ch))
557 return false;
558 }
559 return true;
560 case S_HEX:
561 if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
562 str += 2;
563 ch = *str++;
564 do {
565 if (!isxdigit(ch))
566 return false;
567 } while ((ch = *str++));
568 return true;
569 case S_BOOLEAN:
570 case S_TRISTATE:
571 switch (str[0]) {
572 case 'y': case 'Y':
573 case 'm': case 'M':
574 case 'n': case 'N':
575 return true;
576 }
577 return false;
578 default:
579 return false;
580 }
581}
582
583bool sym_string_within_range(struct symbol *sym, const char *str)
584{
585 struct property *prop;
586 int val;
587
588 switch (sym->type) {
589 case S_STRING:
590 return sym_string_valid(sym, str);
591 case S_INT:
592 if (!sym_string_valid(sym, str))
593 return false;
594 prop = sym_get_range_prop(sym);
595 if (!prop)
596 return true;
597 val = strtol(str, NULL, 10);
598 return val >= sym_get_range_val(prop->expr->left.sym, 10) &&
599 val <= sym_get_range_val(prop->expr->right.sym, 10);
600 case S_HEX:
601 if (!sym_string_valid(sym, str))
602 return false;
603 prop = sym_get_range_prop(sym);
604 if (!prop)
605 return true;
606 val = strtol(str, NULL, 16);
607 return val >= sym_get_range_val(prop->expr->left.sym, 16) &&
608 val <= sym_get_range_val(prop->expr->right.sym, 16);
609 case S_BOOLEAN:
610 case S_TRISTATE:
611 switch (str[0]) {
612 case 'y': case 'Y':
613 return sym_tristate_within_range(sym, yes);
614 case 'm': case 'M':
615 return sym_tristate_within_range(sym, mod);
616 case 'n': case 'N':
617 return sym_tristate_within_range(sym, no);
618 }
619 return false;
620 default:
621 return false;
622 }
623}
624
625bool sym_set_string_value(struct symbol *sym, const char *newval)
626{
627 const char *oldval;
628 char *val;
629 int size;
630
631 switch (sym->type) {
632 case S_BOOLEAN:
633 case S_TRISTATE:
634 switch (newval[0]) {
635 case 'y': case 'Y':
636 return sym_set_tristate_value(sym, yes);
637 case 'm': case 'M':
638 return sym_set_tristate_value(sym, mod);
639 case 'n': case 'N':
640 return sym_set_tristate_value(sym, no);
641 }
642 return false;
643 default:
644 ;
645 }
646
647 if (!sym_string_within_range(sym, newval))
648 return false;
649
650 if (!(sym->flags & SYMBOL_DEF_USER)) {
651 sym->flags |= SYMBOL_DEF_USER;
652 sym_set_changed(sym);
653 }
654
655 oldval = sym->def[S_DEF_USER].val;
656 size = strlen(newval) + 1;
657 if (sym->type == S_HEX && (newval[0] != '0' || (newval[1] != 'x' && newval[1] != 'X'))) {
658 size += 2;
659 sym->def[S_DEF_USER].val = val = malloc(size);
660 *val++ = '0';
661 *val++ = 'x';
662 } else if (!oldval || strcmp(oldval, newval))
663 sym->def[S_DEF_USER].val = val = malloc(size);
664 else
665 return true;
666
667 strcpy(val, newval);
668 free((void *)oldval);
669 sym_clear_all_valid();
670
671 return true;
672}
673
674/*
675 * Find the default value associated to a symbol.
676 * For tristate symbol handle the modules=n case
677 * in which case "m" becomes "y".
678 * If the symbol does not have any default then fallback
679 * to the fixed default values.
680 */
681const char *sym_get_string_default(struct symbol *sym)
682{
683 struct property *prop;
684 struct symbol *ds;
685 const char *str;
686 tristate val;
687
688 sym_calc_visibility(sym);
689 sym_calc_value(modules_sym);
690 val = symbol_no.curr.tri;
691 str = symbol_empty.curr.val;
692
693 /* If symbol has a default value look it up */
694 prop = sym_get_default_prop(sym);
695 if (prop != NULL) {
696 switch (sym->type) {
697 case S_BOOLEAN:
698 case S_TRISTATE:
699 /* The visibility may limit the value from yes => mod */
700 val = EXPR_AND(expr_calc_value(prop->expr), prop->visible.tri);
701 break;
702 default:
703 /*
704 * The following fails to handle the situation
705 * where a default value is further limited by
706 * the valid range.
707 */
708 ds = prop_get_symbol(prop);
709 if (ds != NULL) {
710 sym_calc_value(ds);
711 str = (const char *)ds->curr.val;
712 }
713 }
714 }
715
716 /* Handle select statements */
717 val = EXPR_OR(val, sym->rev_dep.tri);
718
719 /* transpose mod to yes if modules are not enabled */
720 if (val == mod)
721 if (!sym_is_choice_value(sym) && modules_sym->curr.tri == no)
722 val = yes;
723
724 /* transpose mod to yes if type is bool */
725 if (sym->type == S_BOOLEAN && val == mod)
726 val = yes;
727
728 switch (sym->type) {
729 case S_BOOLEAN:
730 case S_TRISTATE:
731 switch (val) {
732 case no: return "n";
733 case mod: return "m";
734 case yes: return "y";
735 }
736 case S_INT:
737 case S_HEX:
738 return str;
739 case S_STRING:
740 return str;
741 case S_OTHER:
742 case S_UNKNOWN:
743 break;
744 }
745 return "";
746}
747
748const char *sym_get_string_value(struct symbol *sym)
749{
750 tristate val;
751
752 switch (sym->type) {
753 case S_BOOLEAN:
754 case S_TRISTATE:
755 val = sym_get_tristate_value(sym);
756 switch (val) {
757 case no:
758 return "n";
759 case mod:
760 sym_calc_value(modules_sym);
761 return (modules_sym->curr.tri == no) ? "n" : "m";
762 case yes:
763 return "y";
764 }
765 break;
766 default:
767 ;
768 }
769 return (const char *)sym->curr.val;
770}
771
772bool sym_is_changable(struct symbol *sym)
773{
774 return sym->visible > sym->rev_dep.tri;
775}
776
777static unsigned strhash(const char *s)
778{
779 /* fnv32 hash */
780 unsigned hash = 2166136261U;
781 for (; *s; s++)
782 hash = (hash ^ *s) * 0x01000193;
783 return hash;
784}
785
786struct symbol *sym_lookup(const char *name, int flags)
787{
788 struct symbol *symbol;
789 char *new_name;
790 int hash;
791
792 if (name) {
793 if (name[0] && !name[1]) {
794 switch (name[0]) {
795 case 'y': return &symbol_yes;
796 case 'm': return &symbol_mod;
797 case 'n': return &symbol_no;
798 }
799 }
800 hash = strhash(name) % SYMBOL_HASHSIZE;
801
802 for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
803 if (symbol->name &&
804 !strcmp(symbol->name, name) &&
805 (flags ? symbol->flags & flags
806 : !(symbol->flags & (SYMBOL_CONST|SYMBOL_CHOICE))))
807 return symbol;
808 }
809 new_name = strdup(name);
810 } else {
811 new_name = NULL;
812 hash = 0;
813 }
814
815 symbol = malloc(sizeof(*symbol));
816 memset(symbol, 0, sizeof(*symbol));
817 symbol->name = new_name;
818 symbol->type = S_UNKNOWN;
819 symbol->flags |= flags;
820
821 symbol->next = symbol_hash[hash];
822 symbol_hash[hash] = symbol;
823
824 return symbol;
825}
826
827struct symbol *sym_find(const char *name)
828{
829 struct symbol *symbol = NULL;
830 int hash = 0;
831
832 if (!name)
833 return NULL;
834
835 if (name[0] && !name[1]) {
836 switch (name[0]) {
837 case 'y': return &symbol_yes;
838 case 'm': return &symbol_mod;
839 case 'n': return &symbol_no;
840 }
841 }
842 hash = strhash(name) % SYMBOL_HASHSIZE;
843
844 for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
845 if (symbol->name &&
846 !strcmp(symbol->name, name) &&
847 !(symbol->flags & SYMBOL_CONST))
848 break;
849 }
850
851 return symbol;
852}
853
854/*
855 * Expand symbol's names embedded in the string given in argument. Symbols'
856 * name to be expanded shall be prefixed by a '$'. Unknown symbol expands to
857 * the empty string.
858 */
859const char *sym_expand_string_value(const char *in)
860{
861 const char *src;
862 char *res;
863 size_t reslen;
864
865 reslen = strlen(in) + 1;
866 res = malloc(reslen);
867 res[0] = '\0';
868
869 while ((src = strchr(in, '$'))) {
870 char *p, name[SYMBOL_MAXLENGTH];
871 const char *symval = "";
872 struct symbol *sym;
873 size_t newlen;
874
875 strncat(res, in, src - in);
876 src++;
877
878 p = name;
879 while (isalnum(*src) || *src == '_')
880 *p++ = *src++;
881 *p = '\0';
882
883 sym = sym_find(name);
884 if (sym != NULL) {
885 sym_calc_value(sym);
886 symval = sym_get_string_value(sym);
887 }
888
889 newlen = strlen(res) + strlen(symval) + strlen(src) + 1;
890 if (newlen > reslen) {
891 reslen = newlen;
892 res = realloc(res, reslen);
893 }
894
895 strcat(res, symval);
896 in = src;
897 }
898 strcat(res, in);
899
900 return res;
901}
902
903const char *sym_escape_string_value(const char *in)
904{
905 const char *p;
906 size_t reslen;
907 char *res;
908 size_t l;
909
910 reslen = strlen(in) + strlen("\"\"") + 1;
911
912 p = in;
913 for (;;) {
914 l = strcspn(p, "\"\\");
915 p += l;
916
917 if (p[0] == '\0')
918 break;
919
920 reslen++;
921 p++;
922 }
923
924 res = malloc(reslen);
925 res[0] = '\0';
926
927 strcat(res, "\"");
928
929 p = in;
930 for (;;) {
931 l = strcspn(p, "\"\\");
932 strncat(res, p, l);
933 p += l;
934
935 if (p[0] == '\0')
936 break;
937
938 strcat(res, "\\");
939 strncat(res, p++, 1);
940 }
941
942 strcat(res, "\"");
943 return res;
944}
945
946struct symbol **sym_re_search(const char *pattern)
947{
948 struct symbol *sym, **sym_arr = NULL;
949 int i, cnt, size;
950 regex_t re;
951
952 cnt = size = 0;
953 /* Skip if empty */
954 if (strlen(pattern) == 0)
955 return NULL;
956 if (regcomp(&re, pattern, REG_EXTENDED|REG_NOSUB|REG_ICASE))
957 return NULL;
958
959 for_all_symbols(i, sym) {
960 if (sym->flags & SYMBOL_CONST || !sym->name)
961 continue;
962 if (regexec(&re, sym->name, 0, NULL, 0))
963 continue;
964 if (cnt + 1 >= size) {
965 void *tmp = sym_arr;
966 size += 16;
967 sym_arr = realloc(sym_arr, size * sizeof(struct symbol *));
968 if (!sym_arr) {
969 free(tmp);
970 return NULL;
971 }
972 }
973 sym_calc_value(sym);
974 sym_arr[cnt++] = sym;
975 }
976 if (sym_arr)
977 sym_arr[cnt] = NULL;
978 regfree(&re);
979
980 return sym_arr;
981}
982
983/*
984 * When we check for recursive dependencies we use a stack to save
985 * current state so we can print out relevant info to user.
986 * The entries are located on the call stack so no need to free memory.
987 * Note inser() remove() must always match to properly clear the stack.
988 */
989static struct dep_stack {
990 struct dep_stack *prev, *next;
991 struct symbol *sym;
992 struct property *prop;
993 struct expr *expr;
994} *check_top;
995
996static void dep_stack_insert(struct dep_stack *stack, struct symbol *sym)
997{
998 memset(stack, 0, sizeof(*stack));
999 if (check_top)
1000 check_top->next = stack;
1001 stack->prev = check_top;
1002 stack->sym = sym;
1003 check_top = stack;
1004}
1005
1006static void dep_stack_remove(void)
1007{
1008 check_top = check_top->prev;
1009 if (check_top)
1010 check_top->next = NULL;
1011}
1012
1013/*
1014 * Called when we have detected a recursive dependency.
1015 * check_top point to the top of the stact so we use
1016 * the ->prev pointer to locate the bottom of the stack.
1017 */
1018static void sym_check_print_recursive(struct symbol *last_sym)
1019{
1020 struct dep_stack *stack;
1021 struct symbol *sym, *next_sym;
1022 struct menu *menu = NULL;
1023 struct property *prop;
1024 struct dep_stack cv_stack;
1025
1026 if (sym_is_choice_value(last_sym)) {
1027 dep_stack_insert(&cv_stack, last_sym);
1028 last_sym = prop_get_symbol(sym_get_choice_prop(last_sym));
1029 }
1030
1031 for (stack = check_top; stack != NULL; stack = stack->prev)
1032 if (stack->sym == last_sym)
1033 break;
1034 if (!stack) {
1035 fprintf(stderr, "unexpected recursive dependency error\n");
1036 return;
1037 }
1038
1039 for (; stack; stack = stack->next) {
1040 sym = stack->sym;
1041 next_sym = stack->next ? stack->next->sym : last_sym;
1042 prop = stack->prop;
1043 if (prop == NULL)
1044 prop = stack->sym->prop;
1045
1046 /* for choice values find the menu entry (used below) */
1047 if (sym_is_choice(sym) || sym_is_choice_value(sym)) {
1048 for (prop = sym->prop; prop; prop = prop->next) {
1049 menu = prop->menu;
1050 if (prop->menu)
1051 break;
1052 }
1053 }
1054 if (stack->sym == last_sym)
1055 fprintf(stderr, "%s:%d:error: recursive dependency detected!\n",
1056 prop->file->name, prop->lineno);
1057 if (stack->expr) {
1058 fprintf(stderr, "%s:%d:\tsymbol %s %s value contains %s\n",
1059 prop->file->name, prop->lineno,
1060 sym->name ? sym->name : "<choice>",
1061 prop_get_type_name(prop->type),
1062 next_sym->name ? next_sym->name : "<choice>");
1063 } else if (stack->prop) {
1064 fprintf(stderr, "%s:%d:\tsymbol %s depends on %s\n",
1065 prop->file->name, prop->lineno,
1066 sym->name ? sym->name : "<choice>",
1067 next_sym->name ? next_sym->name : "<choice>");
1068 } else if (sym_is_choice(sym)) {
1069 fprintf(stderr, "%s:%d:\tchoice %s contains symbol %s\n",
1070 menu->file->name, menu->lineno,
1071 sym->name ? sym->name : "<choice>",
1072 next_sym->name ? next_sym->name : "<choice>");
1073 } else if (sym_is_choice_value(sym)) {
1074 fprintf(stderr, "%s:%d:\tsymbol %s is part of choice %s\n",
1075 menu->file->name, menu->lineno,
1076 sym->name ? sym->name : "<choice>",
1077 next_sym->name ? next_sym->name : "<choice>");
1078 } else {
1079 fprintf(stderr, "%s:%d:\tsymbol %s is selected by %s\n",
1080 prop->file->name, prop->lineno,
1081 sym->name ? sym->name : "<choice>",
1082 next_sym->name ? next_sym->name : "<choice>");
1083 }
1084 }
1085
1086 if (check_top == &cv_stack)
1087 dep_stack_remove();
1088}
1089
1090static struct symbol *sym_check_expr_deps(struct expr *e)
1091{
1092 struct symbol *sym;
1093
1094 if (!e)
1095 return NULL;
1096 switch (e->type) {
1097 case E_OR:
1098 case E_AND:
1099 sym = sym_check_expr_deps(e->left.expr);
1100 if (sym)
1101 return sym;
1102 return sym_check_expr_deps(e->right.expr);
1103 case E_NOT:
1104 return sym_check_expr_deps(e->left.expr);
1105 case E_EQUAL:
1106 case E_UNEQUAL:
1107 sym = sym_check_deps(e->left.sym);
1108 if (sym)
1109 return sym;
1110 return sym_check_deps(e->right.sym);
1111 case E_SYMBOL:
1112 return sym_check_deps(e->left.sym);
1113 default:
1114 break;
1115 }
1116 printf("Oops! How to check %d?\n", e->type);
1117 return NULL;
1118}
1119
1120/* return NULL when dependencies are OK */
1121static struct symbol *sym_check_sym_deps(struct symbol *sym)
1122{
1123 struct symbol *sym2;
1124 struct property *prop;
1125 struct dep_stack stack;
1126
1127 dep_stack_insert(&stack, sym);
1128
1129 sym2 = sym_check_expr_deps(sym->rev_dep.expr);
1130 if (sym2)
1131 goto out;
1132
1133 for (prop = sym->prop; prop; prop = prop->next) {
1134 if (prop->type == P_CHOICE || prop->type == P_SELECT)
1135 continue;
1136 stack.prop = prop;
1137 sym2 = sym_check_expr_deps(prop->visible.expr);
1138 if (sym2)
1139 break;
1140 if (prop->type != P_DEFAULT || sym_is_choice(sym))
1141 continue;
1142 stack.expr = prop->expr;
1143 sym2 = sym_check_expr_deps(prop->expr);
1144 if (sym2)
1145 break;
1146 stack.expr = NULL;
1147 }
1148
1149out:
1150 dep_stack_remove();
1151
1152 return sym2;
1153}
1154
1155static struct symbol *sym_check_choice_deps(struct symbol *choice)
1156{
1157 struct symbol *sym, *sym2;
1158 struct property *prop;
1159 struct expr *e;
1160 struct dep_stack stack;
1161
1162 dep_stack_insert(&stack, choice);
1163
1164 prop = sym_get_choice_prop(choice);
1165 expr_list_for_each_sym(prop->expr, e, sym)
1166 sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
1167
1168 choice->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
1169 sym2 = sym_check_sym_deps(choice);
1170 choice->flags &= ~SYMBOL_CHECK;
1171 if (sym2)
1172 goto out;
1173
1174 expr_list_for_each_sym(prop->expr, e, sym) {
1175 sym2 = sym_check_sym_deps(sym);
1176 if (sym2)
1177 break;
1178 }
1179out:
1180 expr_list_for_each_sym(prop->expr, e, sym)
1181 sym->flags &= ~SYMBOL_CHECK;
1182
1183 if (sym2 && sym_is_choice_value(sym2) &&
1184 prop_get_symbol(sym_get_choice_prop(sym2)) == choice)
1185 sym2 = choice;
1186
1187 dep_stack_remove();
1188
1189 return sym2;
1190}
1191
1192struct symbol *sym_check_deps(struct symbol *sym)
1193{
1194 struct symbol *sym2;
1195 struct property *prop;
1196
1197 if (sym->flags & SYMBOL_CHECK) {
1198 sym_check_print_recursive(sym);
1199 return sym;
1200 }
1201 if (sym->flags & SYMBOL_CHECKED)
1202 return NULL;
1203
1204 if (sym_is_choice_value(sym)) {
1205 struct dep_stack stack;
1206
1207 /* for choice groups start the check with main choice symbol */
1208 dep_stack_insert(&stack, sym);
1209 prop = sym_get_choice_prop(sym);
1210 sym2 = sym_check_deps(prop_get_symbol(prop));
1211 dep_stack_remove();
1212 } else if (sym_is_choice(sym)) {
1213 sym2 = sym_check_choice_deps(sym);
1214 } else {
1215 sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
1216 sym2 = sym_check_sym_deps(sym);
1217 sym->flags &= ~SYMBOL_CHECK;
1218 }
1219
1220 if (sym2 && sym2 == sym)
1221 sym2 = NULL;
1222
1223 return sym2;
1224}
1225
1226struct property *prop_alloc(enum prop_type type, struct symbol *sym)
1227{
1228 struct property *prop;
1229 struct property **propp;
1230
1231 prop = malloc(sizeof(*prop));
1232 memset(prop, 0, sizeof(*prop));
1233 prop->type = type;
1234 prop->sym = sym;
1235 prop->file = current_file;
1236 prop->lineno = zconf_lineno();
1237
1238 /* append property to the prop list of symbol */
1239 if (sym) {
1240 for (propp = &sym->prop; *propp; propp = &(*propp)->next)
1241 ;
1242 *propp = prop;
1243 }
1244
1245 return prop;
1246}
1247
1248struct symbol *prop_get_symbol(struct property *prop)
1249{
1250 if (prop->expr && (prop->expr->type == E_SYMBOL ||
1251 prop->expr->type == E_LIST))
1252 return prop->expr->left.sym;
1253 return NULL;
1254}
1255
1256const char *prop_get_type_name(enum prop_type type)
1257{
1258 switch (type) {
1259 case P_PROMPT:
1260 return "prompt";
1261 case P_ENV:
1262 return "env";
1263 case P_COMMENT:
1264 return "comment";
1265 case P_MENU:
1266 return "menu";
1267 case P_DEFAULT:
1268 return "default";
1269 case P_CHOICE:
1270 return "choice";
1271 case P_SELECT:
1272 return "select";
1273 case P_RANGE:
1274 return "range";
1275 case P_SYMBOL:
1276 return "symbol";
1277 case P_UNKNOWN:
1278 break;
1279 }
1280 return "unknown";
1281}
1282
1283static void prop_add_env(const char *env)
1284{
1285 struct symbol *sym, *sym2;
1286 struct property *prop;
1287 char *p;
1288
1289 sym = current_entry->sym;
1290 sym->flags |= SYMBOL_AUTO;
1291 for_all_properties(sym, prop, P_ENV) {
1292 sym2 = prop_get_symbol(prop);
1293 if (strcmp(sym2->name, env))
1294 menu_warn(current_entry, "redefining environment symbol from %s",
1295 sym2->name);
1296 return;
1297 }
1298
1299 prop = prop_alloc(P_ENV, sym);
1300 prop->expr = expr_alloc_symbol(sym_lookup(env, SYMBOL_CONST));
1301
1302 sym_env_list = expr_alloc_one(E_LIST, sym_env_list);
1303 sym_env_list->right.sym = sym;
1304
1305 p = getenv(env);
1306 if (p)
1307 sym_add_default(sym, p);
1308 else
1309 menu_warn(current_entry, "environment variable %s undefined", env);
1310}