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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
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
36enum symbol_type sym_get_type(struct symbol *sym)
37{
38 enum symbol_type type = sym->type;
39
40 if (type == S_TRISTATE) {
41 if (sym_is_choice_value(sym) && sym->visible == yes)
42 type = S_BOOLEAN;
43 else if (modules_val == no)
44 type = S_BOOLEAN;
45 }
46 return type;
47}
48
49const char *sym_type_name(enum symbol_type type)
50{
51 switch (type) {
52 case S_BOOLEAN:
53 return "bool";
54 case S_TRISTATE:
55 return "tristate";
56 case S_INT:
57 return "integer";
58 case S_HEX:
59 return "hex";
60 case S_STRING:
61 return "string";
62 case S_UNKNOWN:
63 return "unknown";
64 }
65 return "???";
66}
67
68struct property *sym_get_choice_prop(struct symbol *sym)
69{
70 struct property *prop;
71
72 for_all_choices(sym, prop)
73 return prop;
74 return NULL;
75}
76
77static struct property *sym_get_default_prop(struct symbol *sym)
78{
79 struct property *prop;
80
81 for_all_defaults(sym, prop) {
82 prop->visible.tri = expr_calc_value(prop->visible.expr);
83 if (prop->visible.tri != no)
84 return prop;
85 }
86 return NULL;
87}
88
89struct property *sym_get_range_prop(struct symbol *sym)
90{
91 struct property *prop;
92
93 for_all_properties(sym, prop, P_RANGE) {
94 prop->visible.tri = expr_calc_value(prop->visible.expr);
95 if (prop->visible.tri != no)
96 return prop;
97 }
98 return NULL;
99}
100
101static long long sym_get_range_val(struct symbol *sym, int base)
102{
103 sym_calc_value(sym);
104 switch (sym->type) {
105 case S_INT:
106 base = 10;
107 break;
108 case S_HEX:
109 base = 16;
110 break;
111 default:
112 break;
113 }
114 return strtoll(sym->curr.val, NULL, base);
115}
116
117static void sym_validate_range(struct symbol *sym)
118{
119 struct property *prop;
120 int base;
121 long long val, val2;
122 char str[64];
123
124 switch (sym->type) {
125 case S_INT:
126 base = 10;
127 break;
128 case S_HEX:
129 base = 16;
130 break;
131 default:
132 return;
133 }
134 prop = sym_get_range_prop(sym);
135 if (!prop)
136 return;
137 val = strtoll(sym->curr.val, NULL, base);
138 val2 = sym_get_range_val(prop->expr->left.sym, base);
139 if (val >= val2) {
140 val2 = sym_get_range_val(prop->expr->right.sym, base);
141 if (val <= val2)
142 return;
143 }
144 if (sym->type == S_INT)
145 sprintf(str, "%lld", val2);
146 else
147 sprintf(str, "0x%llx", val2);
148 sym->curr.val = xstrdup(str);
149}
150
151static void sym_set_changed(struct symbol *sym)
152{
153 struct property *prop;
154
155 sym->flags |= SYMBOL_CHANGED;
156 for (prop = sym->prop; prop; prop = prop->next) {
157 if (prop->menu)
158 prop->menu->flags |= MENU_CHANGED;
159 }
160}
161
162static void sym_set_all_changed(void)
163{
164 struct symbol *sym;
165 int i;
166
167 for_all_symbols(i, sym)
168 sym_set_changed(sym);
169}
170
171static void sym_calc_visibility(struct symbol *sym)
172{
173 struct property *prop;
174 struct symbol *choice_sym = NULL;
175 tristate tri;
176
177 /* any prompt visible? */
178 tri = no;
179
180 if (sym_is_choice_value(sym))
181 choice_sym = prop_get_symbol(sym_get_choice_prop(sym));
182
183 for_all_prompts(sym, prop) {
184 prop->visible.tri = expr_calc_value(prop->visible.expr);
185 /*
186 * Tristate choice_values with visibility 'mod' are
187 * not visible if the corresponding choice's value is
188 * 'yes'.
189 */
190 if (choice_sym && sym->type == S_TRISTATE &&
191 prop->visible.tri == mod && choice_sym->curr.tri == yes)
192 prop->visible.tri = no;
193
194 tri = EXPR_OR(tri, prop->visible.tri);
195 }
196 if (tri == mod && (sym->type != S_TRISTATE || modules_val == no))
197 tri = yes;
198 if (sym->visible != tri) {
199 sym->visible = tri;
200 sym_set_changed(sym);
201 }
202 if (sym_is_choice_value(sym))
203 return;
204 /* defaulting to "yes" if no explicit "depends on" are given */
205 tri = yes;
206 if (sym->dir_dep.expr)
207 tri = expr_calc_value(sym->dir_dep.expr);
208 if (tri == mod && sym_get_type(sym) == S_BOOLEAN)
209 tri = yes;
210 if (sym->dir_dep.tri != tri) {
211 sym->dir_dep.tri = tri;
212 sym_set_changed(sym);
213 }
214 tri = no;
215 if (sym->rev_dep.expr)
216 tri = expr_calc_value(sym->rev_dep.expr);
217 if (tri == mod && sym_get_type(sym) == S_BOOLEAN)
218 tri = yes;
219 if (sym->rev_dep.tri != tri) {
220 sym->rev_dep.tri = tri;
221 sym_set_changed(sym);
222 }
223 tri = no;
224 if (sym->implied.expr && sym->dir_dep.tri != no)
225 tri = expr_calc_value(sym->implied.expr);
226 if (tri == mod && sym_get_type(sym) == S_BOOLEAN)
227 tri = yes;
228 if (sym->implied.tri != tri) {
229 sym->implied.tri = tri;
230 sym_set_changed(sym);
231 }
232}
233
234/*
235 * Find the default symbol for a choice.
236 * First try the default values for the choice symbol
237 * Next locate the first visible choice value
238 * Return NULL if none was found
239 */
240struct symbol *sym_choice_default(struct symbol *sym)
241{
242 struct symbol *def_sym;
243 struct property *prop;
244 struct expr *e;
245
246 /* any of the defaults visible? */
247 for_all_defaults(sym, prop) {
248 prop->visible.tri = expr_calc_value(prop->visible.expr);
249 if (prop->visible.tri == no)
250 continue;
251 def_sym = prop_get_symbol(prop);
252 if (def_sym->visible != no)
253 return def_sym;
254 }
255
256 /* just get the first visible value */
257 prop = sym_get_choice_prop(sym);
258 expr_list_for_each_sym(prop->expr, e, def_sym)
259 if (def_sym->visible != no)
260 return def_sym;
261
262 /* failed to locate any defaults */
263 return NULL;
264}
265
266static struct symbol *sym_calc_choice(struct symbol *sym)
267{
268 struct symbol *def_sym;
269 struct property *prop;
270 struct expr *e;
271 int flags;
272
273 /* first calculate all choice values' visibilities */
274 flags = sym->flags;
275 prop = sym_get_choice_prop(sym);
276 expr_list_for_each_sym(prop->expr, e, def_sym) {
277 sym_calc_visibility(def_sym);
278 if (def_sym->visible != no)
279 flags &= def_sym->flags;
280 }
281
282 sym->flags &= flags | ~SYMBOL_DEF_USER;
283
284 /* is the user choice visible? */
285 def_sym = sym->def[S_DEF_USER].val;
286 if (def_sym && def_sym->visible != no)
287 return def_sym;
288
289 def_sym = sym_choice_default(sym);
290
291 if (def_sym == NULL)
292 /* no choice? reset tristate value */
293 sym->curr.tri = no;
294
295 return def_sym;
296}
297
298static void sym_warn_unmet_dep(struct symbol *sym)
299{
300 struct gstr gs = str_new();
301
302 str_printf(&gs,
303 "\nWARNING: unmet direct dependencies detected for %s\n",
304 sym->name);
305 str_printf(&gs,
306 " Depends on [%c]: ",
307 sym->dir_dep.tri == mod ? 'm' : 'n');
308 expr_gstr_print(sym->dir_dep.expr, &gs);
309 str_printf(&gs, "\n");
310
311 expr_gstr_print_revdep(sym->rev_dep.expr, &gs, yes,
312 " Selected by [y]:\n");
313 expr_gstr_print_revdep(sym->rev_dep.expr, &gs, mod,
314 " Selected by [m]:\n");
315
316 fputs(str_get(&gs), stderr);
317}
318
319void sym_calc_value(struct symbol *sym)
320{
321 struct symbol_value newval, oldval;
322 struct property *prop;
323 struct expr *e;
324
325 if (!sym)
326 return;
327
328 if (sym->flags & SYMBOL_VALID)
329 return;
330
331 if (sym_is_choice_value(sym) &&
332 sym->flags & SYMBOL_NEED_SET_CHOICE_VALUES) {
333 sym->flags &= ~SYMBOL_NEED_SET_CHOICE_VALUES;
334 prop = sym_get_choice_prop(sym);
335 sym_calc_value(prop_get_symbol(prop));
336 }
337
338 sym->flags |= SYMBOL_VALID;
339
340 oldval = sym->curr;
341
342 switch (sym->type) {
343 case S_INT:
344 case S_HEX:
345 case S_STRING:
346 newval = symbol_empty.curr;
347 break;
348 case S_BOOLEAN:
349 case S_TRISTATE:
350 newval = symbol_no.curr;
351 break;
352 default:
353 sym->curr.val = sym->name;
354 sym->curr.tri = no;
355 return;
356 }
357 sym->flags &= ~SYMBOL_WRITE;
358
359 sym_calc_visibility(sym);
360
361 if (sym->visible != no)
362 sym->flags |= SYMBOL_WRITE;
363
364 /* set default if recursively called */
365 sym->curr = newval;
366
367 switch (sym_get_type(sym)) {
368 case S_BOOLEAN:
369 case S_TRISTATE:
370 if (sym_is_choice_value(sym) && sym->visible == yes) {
371 prop = sym_get_choice_prop(sym);
372 newval.tri = (prop_get_symbol(prop)->curr.val == sym) ? yes : no;
373 } else {
374 if (sym->visible != no) {
375 /* if the symbol is visible use the user value
376 * if available, otherwise try the default value
377 */
378 if (sym_has_value(sym)) {
379 newval.tri = EXPR_AND(sym->def[S_DEF_USER].tri,
380 sym->visible);
381 goto calc_newval;
382 }
383 }
384 if (sym->rev_dep.tri != no)
385 sym->flags |= SYMBOL_WRITE;
386 if (!sym_is_choice(sym)) {
387 prop = sym_get_default_prop(sym);
388 if (prop) {
389 newval.tri = EXPR_AND(expr_calc_value(prop->expr),
390 prop->visible.tri);
391 if (newval.tri != no)
392 sym->flags |= SYMBOL_WRITE;
393 }
394 if (sym->implied.tri != no) {
395 sym->flags |= SYMBOL_WRITE;
396 newval.tri = EXPR_OR(newval.tri, sym->implied.tri);
397 }
398 }
399 calc_newval:
400 if (sym->dir_dep.tri < sym->rev_dep.tri)
401 sym_warn_unmet_dep(sym);
402 newval.tri = EXPR_OR(newval.tri, sym->rev_dep.tri);
403 }
404 if (newval.tri == mod &&
405 (sym_get_type(sym) == S_BOOLEAN || sym->implied.tri == yes))
406 newval.tri = yes;
407 break;
408 case S_STRING:
409 case S_HEX:
410 case S_INT:
411 if (sym->visible != no && sym_has_value(sym)) {
412 newval.val = sym->def[S_DEF_USER].val;
413 break;
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_NO_WRITE)
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->implied.tri == yes && val == mod)
488 return false;
489 if (sym_is_choice_value(sym) && sym->visible == yes)
490 return val == yes;
491 return val >= sym->rev_dep.tri && val <= sym->visible;
492}
493
494bool sym_set_tristate_value(struct symbol *sym, tristate val)
495{
496 tristate oldval = sym_get_tristate_value(sym);
497
498 if (oldval != val && !sym_tristate_within_range(sym, val))
499 return false;
500
501 if (!(sym->flags & SYMBOL_DEF_USER)) {
502 sym->flags |= SYMBOL_DEF_USER;
503 sym_set_changed(sym);
504 }
505 /*
506 * setting a choice value also resets the new flag of the choice
507 * symbol and all other choice values.
508 */
509 if (sym_is_choice_value(sym) && val == yes) {
510 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
511 struct property *prop;
512 struct expr *e;
513
514 cs->def[S_DEF_USER].val = sym;
515 cs->flags |= SYMBOL_DEF_USER;
516 prop = sym_get_choice_prop(cs);
517 for (e = prop->expr; e; e = e->left.expr) {
518 if (e->right.sym->visible != no)
519 e->right.sym->flags |= SYMBOL_DEF_USER;
520 }
521 }
522
523 sym->def[S_DEF_USER].tri = val;
524 if (oldval != val)
525 sym_clear_all_valid();
526
527 return true;
528}
529
530tristate sym_toggle_tristate_value(struct symbol *sym)
531{
532 tristate oldval, newval;
533
534 oldval = newval = sym_get_tristate_value(sym);
535 do {
536 switch (newval) {
537 case no:
538 newval = mod;
539 break;
540 case mod:
541 newval = yes;
542 break;
543 case yes:
544 newval = no;
545 break;
546 }
547 if (sym_set_tristate_value(sym, newval))
548 break;
549 } while (oldval != newval);
550 return newval;
551}
552
553bool sym_string_valid(struct symbol *sym, const char *str)
554{
555 signed char ch;
556
557 switch (sym->type) {
558 case S_STRING:
559 return true;
560 case S_INT:
561 ch = *str++;
562 if (ch == '-')
563 ch = *str++;
564 if (!isdigit(ch))
565 return false;
566 if (ch == '0' && *str != 0)
567 return false;
568 while ((ch = *str++)) {
569 if (!isdigit(ch))
570 return false;
571 }
572 return true;
573 case S_HEX:
574 if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
575 str += 2;
576 ch = *str++;
577 do {
578 if (!isxdigit(ch))
579 return false;
580 } while ((ch = *str++));
581 return true;
582 case S_BOOLEAN:
583 case S_TRISTATE:
584 switch (str[0]) {
585 case 'y': case 'Y':
586 case 'm': case 'M':
587 case 'n': case 'N':
588 return true;
589 }
590 return false;
591 default:
592 return false;
593 }
594}
595
596bool sym_string_within_range(struct symbol *sym, const char *str)
597{
598 struct property *prop;
599 long long val;
600
601 switch (sym->type) {
602 case S_STRING:
603 return sym_string_valid(sym, str);
604 case S_INT:
605 if (!sym_string_valid(sym, str))
606 return false;
607 prop = sym_get_range_prop(sym);
608 if (!prop)
609 return true;
610 val = strtoll(str, NULL, 10);
611 return val >= sym_get_range_val(prop->expr->left.sym, 10) &&
612 val <= sym_get_range_val(prop->expr->right.sym, 10);
613 case S_HEX:
614 if (!sym_string_valid(sym, str))
615 return false;
616 prop = sym_get_range_prop(sym);
617 if (!prop)
618 return true;
619 val = strtoll(str, NULL, 16);
620 return val >= sym_get_range_val(prop->expr->left.sym, 16) &&
621 val <= sym_get_range_val(prop->expr->right.sym, 16);
622 case S_BOOLEAN:
623 case S_TRISTATE:
624 switch (str[0]) {
625 case 'y': case 'Y':
626 return sym_tristate_within_range(sym, yes);
627 case 'm': case 'M':
628 return sym_tristate_within_range(sym, mod);
629 case 'n': case 'N':
630 return sym_tristate_within_range(sym, no);
631 }
632 return false;
633 default:
634 return false;
635 }
636}
637
638bool sym_set_string_value(struct symbol *sym, const char *newval)
639{
640 const char *oldval;
641 char *val;
642 int size;
643
644 switch (sym->type) {
645 case S_BOOLEAN:
646 case S_TRISTATE:
647 switch (newval[0]) {
648 case 'y': case 'Y':
649 return sym_set_tristate_value(sym, yes);
650 case 'm': case 'M':
651 return sym_set_tristate_value(sym, mod);
652 case 'n': case 'N':
653 return sym_set_tristate_value(sym, no);
654 }
655 return false;
656 default:
657 ;
658 }
659
660 if (!sym_string_within_range(sym, newval))
661 return false;
662
663 if (!(sym->flags & SYMBOL_DEF_USER)) {
664 sym->flags |= SYMBOL_DEF_USER;
665 sym_set_changed(sym);
666 }
667
668 oldval = sym->def[S_DEF_USER].val;
669 size = strlen(newval) + 1;
670 if (sym->type == S_HEX && (newval[0] != '0' || (newval[1] != 'x' && newval[1] != 'X'))) {
671 size += 2;
672 sym->def[S_DEF_USER].val = val = xmalloc(size);
673 *val++ = '0';
674 *val++ = 'x';
675 } else if (!oldval || strcmp(oldval, newval))
676 sym->def[S_DEF_USER].val = val = xmalloc(size);
677 else
678 return true;
679
680 strcpy(val, newval);
681 free((void *)oldval);
682 sym_clear_all_valid();
683
684 return true;
685}
686
687/*
688 * Find the default value associated to a symbol.
689 * For tristate symbol handle the modules=n case
690 * in which case "m" becomes "y".
691 * If the symbol does not have any default then fallback
692 * to the fixed default values.
693 */
694const char *sym_get_string_default(struct symbol *sym)
695{
696 struct property *prop;
697 struct symbol *ds;
698 const char *str;
699 tristate val;
700
701 sym_calc_visibility(sym);
702 sym_calc_value(modules_sym);
703 val = symbol_no.curr.tri;
704 str = symbol_empty.curr.val;
705
706 /* If symbol has a default value look it up */
707 prop = sym_get_default_prop(sym);
708 if (prop != NULL) {
709 switch (sym->type) {
710 case S_BOOLEAN:
711 case S_TRISTATE:
712 /* The visibility may limit the value from yes => mod */
713 val = EXPR_AND(expr_calc_value(prop->expr), prop->visible.tri);
714 break;
715 default:
716 /*
717 * The following fails to handle the situation
718 * where a default value is further limited by
719 * the valid range.
720 */
721 ds = prop_get_symbol(prop);
722 if (ds != NULL) {
723 sym_calc_value(ds);
724 str = (const char *)ds->curr.val;
725 }
726 }
727 }
728
729 /* Handle select statements */
730 val = EXPR_OR(val, sym->rev_dep.tri);
731
732 /* transpose mod to yes if modules are not enabled */
733 if (val == mod)
734 if (!sym_is_choice_value(sym) && modules_sym->curr.tri == no)
735 val = yes;
736
737 /* transpose mod to yes if type is bool */
738 if (sym->type == S_BOOLEAN && val == mod)
739 val = yes;
740
741 /* adjust the default value if this symbol is implied by another */
742 if (val < sym->implied.tri)
743 val = sym->implied.tri;
744
745 switch (sym->type) {
746 case S_BOOLEAN:
747 case S_TRISTATE:
748 switch (val) {
749 case no: return "n";
750 case mod: return "m";
751 case yes: return "y";
752 }
753 case S_INT:
754 case S_HEX:
755 return str;
756 case S_STRING:
757 return str;
758 case S_UNKNOWN:
759 break;
760 }
761 return "";
762}
763
764const char *sym_get_string_value(struct symbol *sym)
765{
766 tristate val;
767
768 switch (sym->type) {
769 case S_BOOLEAN:
770 case S_TRISTATE:
771 val = sym_get_tristate_value(sym);
772 switch (val) {
773 case no:
774 return "n";
775 case mod:
776 sym_calc_value(modules_sym);
777 return (modules_sym->curr.tri == no) ? "n" : "m";
778 case yes:
779 return "y";
780 }
781 break;
782 default:
783 ;
784 }
785 return (const char *)sym->curr.val;
786}
787
788bool sym_is_changeable(struct symbol *sym)
789{
790 return sym->visible > sym->rev_dep.tri;
791}
792
793static unsigned strhash(const char *s)
794{
795 /* fnv32 hash */
796 unsigned hash = 2166136261U;
797 for (; *s; s++)
798 hash = (hash ^ *s) * 0x01000193;
799 return hash;
800}
801
802struct symbol *sym_lookup(const char *name, int flags)
803{
804 struct symbol *symbol;
805 char *new_name;
806 int hash;
807
808 if (name) {
809 if (name[0] && !name[1]) {
810 switch (name[0]) {
811 case 'y': return &symbol_yes;
812 case 'm': return &symbol_mod;
813 case 'n': return &symbol_no;
814 }
815 }
816 hash = strhash(name) % SYMBOL_HASHSIZE;
817
818 for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
819 if (symbol->name &&
820 !strcmp(symbol->name, name) &&
821 (flags ? symbol->flags & flags
822 : !(symbol->flags & (SYMBOL_CONST|SYMBOL_CHOICE))))
823 return symbol;
824 }
825 new_name = xstrdup(name);
826 } else {
827 new_name = NULL;
828 hash = 0;
829 }
830
831 symbol = xmalloc(sizeof(*symbol));
832 memset(symbol, 0, sizeof(*symbol));
833 symbol->name = new_name;
834 symbol->type = S_UNKNOWN;
835 symbol->flags |= flags;
836
837 symbol->next = symbol_hash[hash];
838 symbol_hash[hash] = symbol;
839
840 return symbol;
841}
842
843struct symbol *sym_find(const char *name)
844{
845 struct symbol *symbol = NULL;
846 int hash = 0;
847
848 if (!name)
849 return NULL;
850
851 if (name[0] && !name[1]) {
852 switch (name[0]) {
853 case 'y': return &symbol_yes;
854 case 'm': return &symbol_mod;
855 case 'n': return &symbol_no;
856 }
857 }
858 hash = strhash(name) % SYMBOL_HASHSIZE;
859
860 for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
861 if (symbol->name &&
862 !strcmp(symbol->name, name) &&
863 !(symbol->flags & SYMBOL_CONST))
864 break;
865 }
866
867 return symbol;
868}
869
870const char *sym_escape_string_value(const char *in)
871{
872 const char *p;
873 size_t reslen;
874 char *res;
875 size_t l;
876
877 reslen = strlen(in) + strlen("\"\"") + 1;
878
879 p = in;
880 for (;;) {
881 l = strcspn(p, "\"\\");
882 p += l;
883
884 if (p[0] == '\0')
885 break;
886
887 reslen++;
888 p++;
889 }
890
891 res = xmalloc(reslen);
892 res[0] = '\0';
893
894 strcat(res, "\"");
895
896 p = in;
897 for (;;) {
898 l = strcspn(p, "\"\\");
899 strncat(res, p, l);
900 p += l;
901
902 if (p[0] == '\0')
903 break;
904
905 strcat(res, "\\");
906 strncat(res, p++, 1);
907 }
908
909 strcat(res, "\"");
910 return res;
911}
912
913struct sym_match {
914 struct symbol *sym;
915 off_t so, eo;
916};
917
918/* Compare matched symbols as thus:
919 * - first, symbols that match exactly
920 * - then, alphabetical sort
921 */
922static int sym_rel_comp(const void *sym1, const void *sym2)
923{
924 const struct sym_match *s1 = sym1;
925 const struct sym_match *s2 = sym2;
926 int exact1, exact2;
927
928 /* Exact match:
929 * - if matched length on symbol s1 is the length of that symbol,
930 * then this symbol should come first;
931 * - if matched length on symbol s2 is the length of that symbol,
932 * then this symbol should come first.
933 * Note: since the search can be a regexp, both symbols may match
934 * exactly; if this is the case, we can't decide which comes first,
935 * and we fallback to sorting alphabetically.
936 */
937 exact1 = (s1->eo - s1->so) == strlen(s1->sym->name);
938 exact2 = (s2->eo - s2->so) == strlen(s2->sym->name);
939 if (exact1 && !exact2)
940 return -1;
941 if (!exact1 && exact2)
942 return 1;
943
944 /* As a fallback, sort symbols alphabetically */
945 return strcmp(s1->sym->name, s2->sym->name);
946}
947
948struct symbol **sym_re_search(const char *pattern)
949{
950 struct symbol *sym, **sym_arr = NULL;
951 struct sym_match *sym_match_arr = NULL;
952 int i, cnt, size;
953 regex_t re;
954 regmatch_t match[1];
955
956 cnt = size = 0;
957 /* Skip if empty */
958 if (strlen(pattern) == 0)
959 return NULL;
960 if (regcomp(&re, pattern, REG_EXTENDED|REG_ICASE))
961 return NULL;
962
963 for_all_symbols(i, sym) {
964 if (sym->flags & SYMBOL_CONST || !sym->name)
965 continue;
966 if (regexec(&re, sym->name, 1, match, 0))
967 continue;
968 if (cnt >= size) {
969 void *tmp;
970 size += 16;
971 tmp = realloc(sym_match_arr, size * sizeof(struct sym_match));
972 if (!tmp)
973 goto sym_re_search_free;
974 sym_match_arr = tmp;
975 }
976 sym_calc_value(sym);
977 /* As regexec returned 0, we know we have a match, so
978 * we can use match[0].rm_[se]o without further checks
979 */
980 sym_match_arr[cnt].so = match[0].rm_so;
981 sym_match_arr[cnt].eo = match[0].rm_eo;
982 sym_match_arr[cnt++].sym = sym;
983 }
984 if (sym_match_arr) {
985 qsort(sym_match_arr, cnt, sizeof(struct sym_match), sym_rel_comp);
986 sym_arr = malloc((cnt+1) * sizeof(struct symbol *));
987 if (!sym_arr)
988 goto sym_re_search_free;
989 for (i = 0; i < cnt; i++)
990 sym_arr[i] = sym_match_arr[i].sym;
991 sym_arr[cnt] = NULL;
992 }
993sym_re_search_free:
994 /* sym_match_arr can be NULL if no match, but free(NULL) is OK */
995 free(sym_match_arr);
996 regfree(&re);
997
998 return sym_arr;
999}
1000
1001/*
1002 * When we check for recursive dependencies we use a stack to save
1003 * current state so we can print out relevant info to user.
1004 * The entries are located on the call stack so no need to free memory.
1005 * Note insert() remove() must always match to properly clear the stack.
1006 */
1007static struct dep_stack {
1008 struct dep_stack *prev, *next;
1009 struct symbol *sym;
1010 struct property *prop;
1011 struct expr **expr;
1012} *check_top;
1013
1014static void dep_stack_insert(struct dep_stack *stack, struct symbol *sym)
1015{
1016 memset(stack, 0, sizeof(*stack));
1017 if (check_top)
1018 check_top->next = stack;
1019 stack->prev = check_top;
1020 stack->sym = sym;
1021 check_top = stack;
1022}
1023
1024static void dep_stack_remove(void)
1025{
1026 check_top = check_top->prev;
1027 if (check_top)
1028 check_top->next = NULL;
1029}
1030
1031/*
1032 * Called when we have detected a recursive dependency.
1033 * check_top point to the top of the stact so we use
1034 * the ->prev pointer to locate the bottom of the stack.
1035 */
1036static void sym_check_print_recursive(struct symbol *last_sym)
1037{
1038 struct dep_stack *stack;
1039 struct symbol *sym, *next_sym;
1040 struct menu *menu = NULL;
1041 struct property *prop;
1042 struct dep_stack cv_stack;
1043
1044 if (sym_is_choice_value(last_sym)) {
1045 dep_stack_insert(&cv_stack, last_sym);
1046 last_sym = prop_get_symbol(sym_get_choice_prop(last_sym));
1047 }
1048
1049 for (stack = check_top; stack != NULL; stack = stack->prev)
1050 if (stack->sym == last_sym)
1051 break;
1052 if (!stack) {
1053 fprintf(stderr, "unexpected recursive dependency error\n");
1054 return;
1055 }
1056
1057 for (; stack; stack = stack->next) {
1058 sym = stack->sym;
1059 next_sym = stack->next ? stack->next->sym : last_sym;
1060 prop = stack->prop;
1061 if (prop == NULL)
1062 prop = stack->sym->prop;
1063
1064 /* for choice values find the menu entry (used below) */
1065 if (sym_is_choice(sym) || sym_is_choice_value(sym)) {
1066 for (prop = sym->prop; prop; prop = prop->next) {
1067 menu = prop->menu;
1068 if (prop->menu)
1069 break;
1070 }
1071 }
1072 if (stack->sym == last_sym)
1073 fprintf(stderr, "%s:%d:error: recursive dependency detected!\n",
1074 prop->file->name, prop->lineno);
1075
1076 if (sym_is_choice(sym)) {
1077 fprintf(stderr, "%s:%d:\tchoice %s contains symbol %s\n",
1078 menu->file->name, menu->lineno,
1079 sym->name ? sym->name : "<choice>",
1080 next_sym->name ? next_sym->name : "<choice>");
1081 } else if (sym_is_choice_value(sym)) {
1082 fprintf(stderr, "%s:%d:\tsymbol %s is part of choice %s\n",
1083 menu->file->name, menu->lineno,
1084 sym->name ? sym->name : "<choice>",
1085 next_sym->name ? next_sym->name : "<choice>");
1086 } else if (stack->expr == &sym->dir_dep.expr) {
1087 fprintf(stderr, "%s:%d:\tsymbol %s depends on %s\n",
1088 prop->file->name, prop->lineno,
1089 sym->name ? sym->name : "<choice>",
1090 next_sym->name ? next_sym->name : "<choice>");
1091 } else if (stack->expr == &sym->rev_dep.expr) {
1092 fprintf(stderr, "%s:%d:\tsymbol %s is selected by %s\n",
1093 prop->file->name, prop->lineno,
1094 sym->name ? sym->name : "<choice>",
1095 next_sym->name ? next_sym->name : "<choice>");
1096 } else if (stack->expr == &sym->implied.expr) {
1097 fprintf(stderr, "%s:%d:\tsymbol %s is implied by %s\n",
1098 prop->file->name, prop->lineno,
1099 sym->name ? sym->name : "<choice>",
1100 next_sym->name ? next_sym->name : "<choice>");
1101 } else if (stack->expr) {
1102 fprintf(stderr, "%s:%d:\tsymbol %s %s value contains %s\n",
1103 prop->file->name, prop->lineno,
1104 sym->name ? sym->name : "<choice>",
1105 prop_get_type_name(prop->type),
1106 next_sym->name ? next_sym->name : "<choice>");
1107 } else {
1108 fprintf(stderr, "%s:%d:\tsymbol %s %s is visible depending on %s\n",
1109 prop->file->name, prop->lineno,
1110 sym->name ? sym->name : "<choice>",
1111 prop_get_type_name(prop->type),
1112 next_sym->name ? next_sym->name : "<choice>");
1113 }
1114 }
1115
1116 fprintf(stderr,
1117 "For a resolution refer to Documentation/kbuild/kconfig-language.rst\n"
1118 "subsection \"Kconfig recursive dependency limitations\"\n"
1119 "\n");
1120
1121 if (check_top == &cv_stack)
1122 dep_stack_remove();
1123}
1124
1125static struct symbol *sym_check_expr_deps(struct expr *e)
1126{
1127 struct symbol *sym;
1128
1129 if (!e)
1130 return NULL;
1131 switch (e->type) {
1132 case E_OR:
1133 case E_AND:
1134 sym = sym_check_expr_deps(e->left.expr);
1135 if (sym)
1136 return sym;
1137 return sym_check_expr_deps(e->right.expr);
1138 case E_NOT:
1139 return sym_check_expr_deps(e->left.expr);
1140 case E_EQUAL:
1141 case E_GEQ:
1142 case E_GTH:
1143 case E_LEQ:
1144 case E_LTH:
1145 case E_UNEQUAL:
1146 sym = sym_check_deps(e->left.sym);
1147 if (sym)
1148 return sym;
1149 return sym_check_deps(e->right.sym);
1150 case E_SYMBOL:
1151 return sym_check_deps(e->left.sym);
1152 default:
1153 break;
1154 }
1155 fprintf(stderr, "Oops! How to check %d?\n", e->type);
1156 return NULL;
1157}
1158
1159/* return NULL when dependencies are OK */
1160static struct symbol *sym_check_sym_deps(struct symbol *sym)
1161{
1162 struct symbol *sym2;
1163 struct property *prop;
1164 struct dep_stack stack;
1165
1166 dep_stack_insert(&stack, sym);
1167
1168 stack.expr = &sym->dir_dep.expr;
1169 sym2 = sym_check_expr_deps(sym->dir_dep.expr);
1170 if (sym2)
1171 goto out;
1172
1173 stack.expr = &sym->rev_dep.expr;
1174 sym2 = sym_check_expr_deps(sym->rev_dep.expr);
1175 if (sym2)
1176 goto out;
1177
1178 stack.expr = &sym->implied.expr;
1179 sym2 = sym_check_expr_deps(sym->implied.expr);
1180 if (sym2)
1181 goto out;
1182
1183 stack.expr = NULL;
1184
1185 for (prop = sym->prop; prop; prop = prop->next) {
1186 if (prop->type == P_CHOICE || prop->type == P_SELECT ||
1187 prop->type == P_IMPLY)
1188 continue;
1189 stack.prop = prop;
1190 sym2 = sym_check_expr_deps(prop->visible.expr);
1191 if (sym2)
1192 break;
1193 if (prop->type != P_DEFAULT || sym_is_choice(sym))
1194 continue;
1195 stack.expr = &prop->expr;
1196 sym2 = sym_check_expr_deps(prop->expr);
1197 if (sym2)
1198 break;
1199 stack.expr = NULL;
1200 }
1201
1202out:
1203 dep_stack_remove();
1204
1205 return sym2;
1206}
1207
1208static struct symbol *sym_check_choice_deps(struct symbol *choice)
1209{
1210 struct symbol *sym, *sym2;
1211 struct property *prop;
1212 struct expr *e;
1213 struct dep_stack stack;
1214
1215 dep_stack_insert(&stack, choice);
1216
1217 prop = sym_get_choice_prop(choice);
1218 expr_list_for_each_sym(prop->expr, e, sym)
1219 sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
1220
1221 choice->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
1222 sym2 = sym_check_sym_deps(choice);
1223 choice->flags &= ~SYMBOL_CHECK;
1224 if (sym2)
1225 goto out;
1226
1227 expr_list_for_each_sym(prop->expr, e, sym) {
1228 sym2 = sym_check_sym_deps(sym);
1229 if (sym2)
1230 break;
1231 }
1232out:
1233 expr_list_for_each_sym(prop->expr, e, sym)
1234 sym->flags &= ~SYMBOL_CHECK;
1235
1236 if (sym2 && sym_is_choice_value(sym2) &&
1237 prop_get_symbol(sym_get_choice_prop(sym2)) == choice)
1238 sym2 = choice;
1239
1240 dep_stack_remove();
1241
1242 return sym2;
1243}
1244
1245struct symbol *sym_check_deps(struct symbol *sym)
1246{
1247 struct symbol *sym2;
1248 struct property *prop;
1249
1250 if (sym->flags & SYMBOL_CHECK) {
1251 sym_check_print_recursive(sym);
1252 return sym;
1253 }
1254 if (sym->flags & SYMBOL_CHECKED)
1255 return NULL;
1256
1257 if (sym_is_choice_value(sym)) {
1258 struct dep_stack stack;
1259
1260 /* for choice groups start the check with main choice symbol */
1261 dep_stack_insert(&stack, sym);
1262 prop = sym_get_choice_prop(sym);
1263 sym2 = sym_check_deps(prop_get_symbol(prop));
1264 dep_stack_remove();
1265 } else if (sym_is_choice(sym)) {
1266 sym2 = sym_check_choice_deps(sym);
1267 } else {
1268 sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
1269 sym2 = sym_check_sym_deps(sym);
1270 sym->flags &= ~SYMBOL_CHECK;
1271 }
1272
1273 return sym2;
1274}
1275
1276struct property *prop_alloc(enum prop_type type, struct symbol *sym)
1277{
1278 struct property *prop;
1279 struct property **propp;
1280
1281 prop = xmalloc(sizeof(*prop));
1282 memset(prop, 0, sizeof(*prop));
1283 prop->type = type;
1284 prop->sym = sym;
1285 prop->file = current_file;
1286 prop->lineno = zconf_lineno();
1287
1288 /* append property to the prop list of symbol */
1289 if (sym) {
1290 for (propp = &sym->prop; *propp; propp = &(*propp)->next)
1291 ;
1292 *propp = prop;
1293 }
1294
1295 return prop;
1296}
1297
1298struct symbol *prop_get_symbol(struct property *prop)
1299{
1300 if (prop->expr && (prop->expr->type == E_SYMBOL ||
1301 prop->expr->type == E_LIST))
1302 return prop->expr->left.sym;
1303 return NULL;
1304}
1305
1306const char *prop_get_type_name(enum prop_type type)
1307{
1308 switch (type) {
1309 case P_PROMPT:
1310 return "prompt";
1311 case P_COMMENT:
1312 return "comment";
1313 case P_MENU:
1314 return "menu";
1315 case P_DEFAULT:
1316 return "default";
1317 case P_CHOICE:
1318 return "choice";
1319 case P_SELECT:
1320 return "select";
1321 case P_IMPLY:
1322 return "imply";
1323 case P_RANGE:
1324 return "range";
1325 case P_SYMBOL:
1326 return "symbol";
1327 case P_UNKNOWN:
1328 break;
1329 }
1330 return "unknown";
1331}
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}