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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 <sys/types.h>
7#include <ctype.h>
8#include <stdlib.h>
9#include <string.h>
10#include <regex.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};
19
20struct symbol symbol_mod = {
21 .name = "m",
22 .curr = { "m", mod },
23 .flags = SYMBOL_CONST|SYMBOL_VALID,
24};
25
26struct symbol symbol_no = {
27 .name = "n",
28 .curr = { "n", no },
29 .flags = SYMBOL_CONST|SYMBOL_VALID,
30};
31
32struct symbol *modules_sym;
33static tristate modules_val;
34static int sym_warnings;
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 struct symbol *range_sym;
121 int base;
122 long long val, val2;
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 range_sym = prop->expr->left.sym;
139 val2 = sym_get_range_val(range_sym, base);
140 if (val >= val2) {
141 range_sym = prop->expr->right.sym;
142 val2 = sym_get_range_val(range_sym, base);
143 if (val <= val2)
144 return;
145 }
146 sym->curr.val = range_sym->curr.val;
147}
148
149static void sym_set_changed(struct symbol *sym)
150{
151 struct property *prop;
152
153 sym->flags |= SYMBOL_CHANGED;
154 for (prop = sym->prop; prop; prop = prop->next) {
155 if (prop->menu)
156 prop->menu->flags |= MENU_CHANGED;
157 }
158}
159
160static void sym_set_all_changed(void)
161{
162 struct symbol *sym;
163 int i;
164
165 for_all_symbols(i, sym)
166 sym_set_changed(sym);
167}
168
169static void sym_calc_visibility(struct symbol *sym)
170{
171 struct property *prop;
172 struct symbol *choice_sym = NULL;
173 tristate tri;
174
175 /* any prompt visible? */
176 tri = no;
177
178 if (sym_is_choice_value(sym))
179 choice_sym = prop_get_symbol(sym_get_choice_prop(sym));
180
181 for_all_prompts(sym, prop) {
182 prop->visible.tri = expr_calc_value(prop->visible.expr);
183 /*
184 * Tristate choice_values with visibility 'mod' are
185 * not visible if the corresponding choice's value is
186 * 'yes'.
187 */
188 if (choice_sym && sym->type == S_TRISTATE &&
189 prop->visible.tri == mod && choice_sym->curr.tri == yes)
190 prop->visible.tri = no;
191
192 tri = EXPR_OR(tri, prop->visible.tri);
193 }
194 if (tri == mod && (sym->type != S_TRISTATE || modules_val == no))
195 tri = yes;
196 if (sym->visible != tri) {
197 sym->visible = tri;
198 sym_set_changed(sym);
199 }
200 if (sym_is_choice_value(sym))
201 return;
202 /* defaulting to "yes" if no explicit "depends on" are given */
203 tri = yes;
204 if (sym->dir_dep.expr)
205 tri = expr_calc_value(sym->dir_dep.expr);
206 if (tri == mod && sym_get_type(sym) == S_BOOLEAN)
207 tri = yes;
208 if (sym->dir_dep.tri != tri) {
209 sym->dir_dep.tri = tri;
210 sym_set_changed(sym);
211 }
212 tri = no;
213 if (sym->rev_dep.expr)
214 tri = expr_calc_value(sym->rev_dep.expr);
215 if (tri == mod && sym_get_type(sym) == S_BOOLEAN)
216 tri = yes;
217 if (sym->rev_dep.tri != tri) {
218 sym->rev_dep.tri = tri;
219 sym_set_changed(sym);
220 }
221 tri = no;
222 if (sym->implied.expr)
223 tri = expr_calc_value(sym->implied.expr);
224 if (tri == mod && sym_get_type(sym) == S_BOOLEAN)
225 tri = yes;
226 if (sym->implied.tri != tri) {
227 sym->implied.tri = tri;
228 sym_set_changed(sym);
229 }
230}
231
232/*
233 * Find the default symbol for a choice.
234 * First try the default values for the choice symbol
235 * Next locate the first visible choice value
236 * Return NULL if none was found
237 */
238struct symbol *sym_choice_default(struct symbol *sym)
239{
240 struct symbol *def_sym;
241 struct property *prop;
242 struct expr *e;
243
244 /* any of the defaults visible? */
245 for_all_defaults(sym, prop) {
246 prop->visible.tri = expr_calc_value(prop->visible.expr);
247 if (prop->visible.tri == no)
248 continue;
249 def_sym = prop_get_symbol(prop);
250 if (def_sym->visible != no)
251 return def_sym;
252 }
253
254 /* just get the first visible value */
255 prop = sym_get_choice_prop(sym);
256 expr_list_for_each_sym(prop->expr, e, def_sym)
257 if (def_sym->visible != no)
258 return def_sym;
259
260 /* failed to locate any defaults */
261 return NULL;
262}
263
264static struct symbol *sym_calc_choice(struct symbol *sym)
265{
266 struct symbol *def_sym;
267 struct property *prop;
268 struct expr *e;
269 int flags;
270
271 /* first calculate all choice values' visibilities */
272 flags = sym->flags;
273 prop = sym_get_choice_prop(sym);
274 expr_list_for_each_sym(prop->expr, e, def_sym) {
275 sym_calc_visibility(def_sym);
276 if (def_sym->visible != no)
277 flags &= def_sym->flags;
278 }
279
280 sym->flags &= flags | ~SYMBOL_DEF_USER;
281
282 /* is the user choice visible? */
283 def_sym = sym->def[S_DEF_USER].val;
284 if (def_sym && def_sym->visible != no)
285 return def_sym;
286
287 def_sym = sym_choice_default(sym);
288
289 if (def_sym == NULL)
290 /* no choice? reset tristate value */
291 sym->curr.tri = no;
292
293 return def_sym;
294}
295
296static void sym_warn_unmet_dep(struct symbol *sym)
297{
298 struct gstr gs = str_new();
299
300 str_printf(&gs,
301 "\nWARNING: unmet direct dependencies detected for %s\n",
302 sym->name);
303 str_printf(&gs,
304 " Depends on [%c]: ",
305 sym->dir_dep.tri == mod ? 'm' : 'n');
306 expr_gstr_print(sym->dir_dep.expr, &gs);
307 str_printf(&gs, "\n");
308
309 expr_gstr_print_revdep(sym->rev_dep.expr, &gs, yes,
310 " Selected by [y]:\n");
311 expr_gstr_print_revdep(sym->rev_dep.expr, &gs, mod,
312 " Selected by [m]:\n");
313
314 fputs(str_get(&gs), stderr);
315 sym_warnings++;
316}
317
318bool sym_dep_errors(void)
319{
320 if (sym_warnings)
321 return getenv("KCONFIG_WERROR");
322 return false;
323}
324
325void sym_calc_value(struct symbol *sym)
326{
327 struct symbol_value newval, oldval;
328 struct property *prop;
329 struct expr *e;
330
331 if (!sym)
332 return;
333
334 if (sym->flags & SYMBOL_VALID)
335 return;
336
337 if (sym_is_choice_value(sym) &&
338 sym->flags & SYMBOL_NEED_SET_CHOICE_VALUES) {
339 sym->flags &= ~SYMBOL_NEED_SET_CHOICE_VALUES;
340 prop = sym_get_choice_prop(sym);
341 sym_calc_value(prop_get_symbol(prop));
342 }
343
344 sym->flags |= SYMBOL_VALID;
345
346 oldval = sym->curr;
347
348 newval.tri = no;
349
350 switch (sym->type) {
351 case S_INT:
352 newval.val = "0";
353 break;
354 case S_HEX:
355 newval.val = "0x0";
356 break;
357 case S_STRING:
358 newval.val = "";
359 break;
360 case S_BOOLEAN:
361 case S_TRISTATE:
362 newval.val = "n";
363 break;
364 default:
365 sym->curr.val = sym->name;
366 sym->curr.tri = no;
367 return;
368 }
369 sym->flags &= ~SYMBOL_WRITE;
370
371 sym_calc_visibility(sym);
372
373 if (sym->visible != no)
374 sym->flags |= SYMBOL_WRITE;
375
376 /* set default if recursively called */
377 sym->curr = newval;
378
379 switch (sym_get_type(sym)) {
380 case S_BOOLEAN:
381 case S_TRISTATE:
382 if (sym_is_choice_value(sym) && sym->visible == yes) {
383 prop = sym_get_choice_prop(sym);
384 newval.tri = (prop_get_symbol(prop)->curr.val == sym) ? yes : no;
385 } else {
386 if (sym->visible != no) {
387 /* if the symbol is visible use the user value
388 * if available, otherwise try the default value
389 */
390 if (sym_has_value(sym)) {
391 newval.tri = EXPR_AND(sym->def[S_DEF_USER].tri,
392 sym->visible);
393 goto calc_newval;
394 }
395 }
396 if (sym->rev_dep.tri != no)
397 sym->flags |= SYMBOL_WRITE;
398 if (!sym_is_choice(sym)) {
399 prop = sym_get_default_prop(sym);
400 if (prop) {
401 newval.tri = EXPR_AND(expr_calc_value(prop->expr),
402 prop->visible.tri);
403 if (newval.tri != no)
404 sym->flags |= SYMBOL_WRITE;
405 }
406 if (sym->implied.tri != no) {
407 sym->flags |= SYMBOL_WRITE;
408 newval.tri = EXPR_OR(newval.tri, sym->implied.tri);
409 newval.tri = EXPR_AND(newval.tri,
410 sym->dir_dep.tri);
411 }
412 }
413 calc_newval:
414 if (sym->dir_dep.tri < sym->rev_dep.tri)
415 sym_warn_unmet_dep(sym);
416 newval.tri = EXPR_OR(newval.tri, sym->rev_dep.tri);
417 }
418 if (newval.tri == mod && sym_get_type(sym) == S_BOOLEAN)
419 newval.tri = yes;
420 break;
421 case S_STRING:
422 case S_HEX:
423 case S_INT:
424 if (sym->visible != no && sym_has_value(sym)) {
425 newval.val = sym->def[S_DEF_USER].val;
426 break;
427 }
428 prop = sym_get_default_prop(sym);
429 if (prop) {
430 struct symbol *ds = prop_get_symbol(prop);
431 if (ds) {
432 sym->flags |= SYMBOL_WRITE;
433 sym_calc_value(ds);
434 newval.val = ds->curr.val;
435 }
436 }
437 break;
438 default:
439 ;
440 }
441
442 sym->curr = newval;
443 if (sym_is_choice(sym) && newval.tri == yes)
444 sym->curr.val = sym_calc_choice(sym);
445 sym_validate_range(sym);
446
447 if (memcmp(&oldval, &sym->curr, sizeof(oldval))) {
448 sym_set_changed(sym);
449 if (modules_sym == sym) {
450 sym_set_all_changed();
451 modules_val = modules_sym->curr.tri;
452 }
453 }
454
455 if (sym_is_choice(sym)) {
456 struct symbol *choice_sym;
457
458 prop = sym_get_choice_prop(sym);
459 expr_list_for_each_sym(prop->expr, e, choice_sym) {
460 if ((sym->flags & SYMBOL_WRITE) &&
461 choice_sym->visible != no)
462 choice_sym->flags |= SYMBOL_WRITE;
463 if (sym->flags & SYMBOL_CHANGED)
464 sym_set_changed(choice_sym);
465 }
466 }
467
468 if (sym->flags & SYMBOL_NO_WRITE)
469 sym->flags &= ~SYMBOL_WRITE;
470
471 if (sym->flags & SYMBOL_NEED_SET_CHOICE_VALUES)
472 set_all_choice_values(sym);
473}
474
475void sym_clear_all_valid(void)
476{
477 struct symbol *sym;
478 int i;
479
480 for_all_symbols(i, sym)
481 sym->flags &= ~SYMBOL_VALID;
482 conf_set_changed(true);
483 sym_calc_value(modules_sym);
484}
485
486bool sym_tristate_within_range(struct symbol *sym, tristate val)
487{
488 int type = sym_get_type(sym);
489
490 if (sym->visible == no)
491 return false;
492
493 if (type != S_BOOLEAN && type != S_TRISTATE)
494 return false;
495
496 if (type == S_BOOLEAN && val == mod)
497 return false;
498 if (sym->visible <= sym->rev_dep.tri)
499 return false;
500 if (sym_is_choice_value(sym) && sym->visible == yes)
501 return val == yes;
502 return val >= sym->rev_dep.tri && val <= sym->visible;
503}
504
505bool sym_set_tristate_value(struct symbol *sym, tristate val)
506{
507 tristate oldval = sym_get_tristate_value(sym);
508
509 if (oldval != val && !sym_tristate_within_range(sym, val))
510 return false;
511
512 if (!(sym->flags & SYMBOL_DEF_USER)) {
513 sym->flags |= SYMBOL_DEF_USER;
514 sym_set_changed(sym);
515 }
516 /*
517 * setting a choice value also resets the new flag of the choice
518 * symbol and all other choice values.
519 */
520 if (sym_is_choice_value(sym) && val == yes) {
521 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
522 struct property *prop;
523 struct expr *e;
524
525 cs->def[S_DEF_USER].val = sym;
526 cs->flags |= SYMBOL_DEF_USER;
527 prop = sym_get_choice_prop(cs);
528 for (e = prop->expr; e; e = e->left.expr) {
529 if (e->right.sym->visible != no)
530 e->right.sym->flags |= SYMBOL_DEF_USER;
531 }
532 }
533
534 sym->def[S_DEF_USER].tri = val;
535 if (oldval != val)
536 sym_clear_all_valid();
537
538 return true;
539}
540
541tristate sym_toggle_tristate_value(struct symbol *sym)
542{
543 tristate oldval, newval;
544
545 oldval = newval = sym_get_tristate_value(sym);
546 do {
547 switch (newval) {
548 case no:
549 newval = mod;
550 break;
551 case mod:
552 newval = yes;
553 break;
554 case yes:
555 newval = no;
556 break;
557 }
558 if (sym_set_tristate_value(sym, newval))
559 break;
560 } while (oldval != newval);
561 return newval;
562}
563
564bool sym_string_valid(struct symbol *sym, const char *str)
565{
566 signed char ch;
567
568 switch (sym->type) {
569 case S_STRING:
570 return true;
571 case S_INT:
572 ch = *str++;
573 if (ch == '-')
574 ch = *str++;
575 if (!isdigit(ch))
576 return false;
577 if (ch == '0' && *str != 0)
578 return false;
579 while ((ch = *str++)) {
580 if (!isdigit(ch))
581 return false;
582 }
583 return true;
584 case S_HEX:
585 if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
586 str += 2;
587 ch = *str++;
588 do {
589 if (!isxdigit(ch))
590 return false;
591 } while ((ch = *str++));
592 return true;
593 case S_BOOLEAN:
594 case S_TRISTATE:
595 switch (str[0]) {
596 case 'y': case 'Y':
597 case 'm': case 'M':
598 case 'n': case 'N':
599 return true;
600 }
601 return false;
602 default:
603 return false;
604 }
605}
606
607bool sym_string_within_range(struct symbol *sym, const char *str)
608{
609 struct property *prop;
610 long long val;
611
612 switch (sym->type) {
613 case S_STRING:
614 return sym_string_valid(sym, str);
615 case S_INT:
616 if (!sym_string_valid(sym, str))
617 return false;
618 prop = sym_get_range_prop(sym);
619 if (!prop)
620 return true;
621 val = strtoll(str, NULL, 10);
622 return val >= sym_get_range_val(prop->expr->left.sym, 10) &&
623 val <= sym_get_range_val(prop->expr->right.sym, 10);
624 case S_HEX:
625 if (!sym_string_valid(sym, str))
626 return false;
627 prop = sym_get_range_prop(sym);
628 if (!prop)
629 return true;
630 val = strtoll(str, NULL, 16);
631 return val >= sym_get_range_val(prop->expr->left.sym, 16) &&
632 val <= sym_get_range_val(prop->expr->right.sym, 16);
633 case S_BOOLEAN:
634 case S_TRISTATE:
635 switch (str[0]) {
636 case 'y': case 'Y':
637 return sym_tristate_within_range(sym, yes);
638 case 'm': case 'M':
639 return sym_tristate_within_range(sym, mod);
640 case 'n': case 'N':
641 return sym_tristate_within_range(sym, no);
642 }
643 return false;
644 default:
645 return false;
646 }
647}
648
649bool sym_set_string_value(struct symbol *sym, const char *newval)
650{
651 const char *oldval;
652 char *val;
653 int size;
654
655 switch (sym->type) {
656 case S_BOOLEAN:
657 case S_TRISTATE:
658 switch (newval[0]) {
659 case 'y': case 'Y':
660 return sym_set_tristate_value(sym, yes);
661 case 'm': case 'M':
662 return sym_set_tristate_value(sym, mod);
663 case 'n': case 'N':
664 return sym_set_tristate_value(sym, no);
665 }
666 return false;
667 default:
668 ;
669 }
670
671 if (!sym_string_within_range(sym, newval))
672 return false;
673
674 if (!(sym->flags & SYMBOL_DEF_USER)) {
675 sym->flags |= SYMBOL_DEF_USER;
676 sym_set_changed(sym);
677 }
678
679 oldval = sym->def[S_DEF_USER].val;
680 size = strlen(newval) + 1;
681 if (sym->type == S_HEX && (newval[0] != '0' || (newval[1] != 'x' && newval[1] != 'X'))) {
682 size += 2;
683 sym->def[S_DEF_USER].val = val = xmalloc(size);
684 *val++ = '0';
685 *val++ = 'x';
686 } else if (!oldval || strcmp(oldval, newval))
687 sym->def[S_DEF_USER].val = val = xmalloc(size);
688 else
689 return true;
690
691 strcpy(val, newval);
692 free((void *)oldval);
693 sym_clear_all_valid();
694
695 return true;
696}
697
698/*
699 * Find the default value associated to a symbol.
700 * For tristate symbol handle the modules=n case
701 * in which case "m" becomes "y".
702 * If the symbol does not have any default then fallback
703 * to the fixed default values.
704 */
705const char *sym_get_string_default(struct symbol *sym)
706{
707 struct property *prop;
708 struct symbol *ds;
709 const char *str = "";
710 tristate val;
711
712 sym_calc_visibility(sym);
713 sym_calc_value(modules_sym);
714 val = symbol_no.curr.tri;
715
716 /* If symbol has a default value look it up */
717 prop = sym_get_default_prop(sym);
718 if (prop != NULL) {
719 switch (sym->type) {
720 case S_BOOLEAN:
721 case S_TRISTATE:
722 /* The visibility may limit the value from yes => mod */
723 val = EXPR_AND(expr_calc_value(prop->expr), prop->visible.tri);
724 break;
725 default:
726 /*
727 * The following fails to handle the situation
728 * where a default value is further limited by
729 * the valid range.
730 */
731 ds = prop_get_symbol(prop);
732 if (ds != NULL) {
733 sym_calc_value(ds);
734 str = (const char *)ds->curr.val;
735 }
736 }
737 }
738
739 /* Handle select statements */
740 val = EXPR_OR(val, sym->rev_dep.tri);
741
742 /* transpose mod to yes if modules are not enabled */
743 if (val == mod)
744 if (!sym_is_choice_value(sym) && modules_sym->curr.tri == no)
745 val = yes;
746
747 /* transpose mod to yes if type is bool */
748 if (sym->type == S_BOOLEAN && val == mod)
749 val = yes;
750
751 /* adjust the default value if this symbol is implied by another */
752 if (val < sym->implied.tri)
753 val = sym->implied.tri;
754
755 switch (sym->type) {
756 case S_BOOLEAN:
757 case S_TRISTATE:
758 switch (val) {
759 case no: return "n";
760 case mod: return "m";
761 case yes: return "y";
762 }
763 case S_INT:
764 if (!str[0])
765 str = "0";
766 break;
767 case S_HEX:
768 if (!str[0])
769 str = "0x0";
770 break;
771 default:
772 break;
773 }
774 return str;
775}
776
777const char *sym_get_string_value(struct symbol *sym)
778{
779 tristate val;
780
781 switch (sym->type) {
782 case S_BOOLEAN:
783 case S_TRISTATE:
784 val = sym_get_tristate_value(sym);
785 switch (val) {
786 case no:
787 return "n";
788 case mod:
789 sym_calc_value(modules_sym);
790 return (modules_sym->curr.tri == no) ? "n" : "m";
791 case yes:
792 return "y";
793 }
794 break;
795 default:
796 ;
797 }
798 return (const char *)sym->curr.val;
799}
800
801bool sym_is_changeable(struct symbol *sym)
802{
803 return sym->visible > sym->rev_dep.tri;
804}
805
806static unsigned strhash(const char *s)
807{
808 /* fnv32 hash */
809 unsigned hash = 2166136261U;
810 for (; *s; s++)
811 hash = (hash ^ *s) * 0x01000193;
812 return hash;
813}
814
815struct symbol *sym_lookup(const char *name, int flags)
816{
817 struct symbol *symbol;
818 char *new_name;
819 int hash;
820
821 if (name) {
822 if (name[0] && !name[1]) {
823 switch (name[0]) {
824 case 'y': return &symbol_yes;
825 case 'm': return &symbol_mod;
826 case 'n': return &symbol_no;
827 }
828 }
829 hash = strhash(name) % SYMBOL_HASHSIZE;
830
831 for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
832 if (symbol->name &&
833 !strcmp(symbol->name, name) &&
834 (flags ? symbol->flags & flags
835 : !(symbol->flags & (SYMBOL_CONST|SYMBOL_CHOICE))))
836 return symbol;
837 }
838 new_name = xstrdup(name);
839 } else {
840 new_name = NULL;
841 hash = 0;
842 }
843
844 symbol = xmalloc(sizeof(*symbol));
845 memset(symbol, 0, sizeof(*symbol));
846 symbol->name = new_name;
847 symbol->type = S_UNKNOWN;
848 symbol->flags = flags;
849
850 symbol->next = symbol_hash[hash];
851 symbol_hash[hash] = symbol;
852
853 return symbol;
854}
855
856struct symbol *sym_find(const char *name)
857{
858 struct symbol *symbol = NULL;
859 int hash = 0;
860
861 if (!name)
862 return NULL;
863
864 if (name[0] && !name[1]) {
865 switch (name[0]) {
866 case 'y': return &symbol_yes;
867 case 'm': return &symbol_mod;
868 case 'n': return &symbol_no;
869 }
870 }
871 hash = strhash(name) % SYMBOL_HASHSIZE;
872
873 for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
874 if (symbol->name &&
875 !strcmp(symbol->name, name) &&
876 !(symbol->flags & SYMBOL_CONST))
877 break;
878 }
879
880 return symbol;
881}
882
883struct sym_match {
884 struct symbol *sym;
885 off_t so, eo;
886};
887
888/* Compare matched symbols as thus:
889 * - first, symbols that match exactly
890 * - then, alphabetical sort
891 */
892static int sym_rel_comp(const void *sym1, const void *sym2)
893{
894 const struct sym_match *s1 = sym1;
895 const struct sym_match *s2 = sym2;
896 int exact1, exact2;
897
898 /* Exact match:
899 * - if matched length on symbol s1 is the length of that symbol,
900 * then this symbol should come first;
901 * - if matched length on symbol s2 is the length of that symbol,
902 * then this symbol should come first.
903 * Note: since the search can be a regexp, both symbols may match
904 * exactly; if this is the case, we can't decide which comes first,
905 * and we fallback to sorting alphabetically.
906 */
907 exact1 = (s1->eo - s1->so) == strlen(s1->sym->name);
908 exact2 = (s2->eo - s2->so) == strlen(s2->sym->name);
909 if (exact1 && !exact2)
910 return -1;
911 if (!exact1 && exact2)
912 return 1;
913
914 /* As a fallback, sort symbols alphabetically */
915 return strcmp(s1->sym->name, s2->sym->name);
916}
917
918struct symbol **sym_re_search(const char *pattern)
919{
920 struct symbol *sym, **sym_arr = NULL;
921 struct sym_match *sym_match_arr = NULL;
922 int i, cnt, size;
923 regex_t re;
924 regmatch_t match[1];
925
926 cnt = size = 0;
927 /* Skip if empty */
928 if (strlen(pattern) == 0)
929 return NULL;
930 if (regcomp(&re, pattern, REG_EXTENDED|REG_ICASE))
931 return NULL;
932
933 for_all_symbols(i, sym) {
934 if (sym->flags & SYMBOL_CONST || !sym->name)
935 continue;
936 if (regexec(&re, sym->name, 1, match, 0))
937 continue;
938 if (cnt >= size) {
939 void *tmp;
940 size += 16;
941 tmp = realloc(sym_match_arr, size * sizeof(struct sym_match));
942 if (!tmp)
943 goto sym_re_search_free;
944 sym_match_arr = tmp;
945 }
946 sym_calc_value(sym);
947 /* As regexec returned 0, we know we have a match, so
948 * we can use match[0].rm_[se]o without further checks
949 */
950 sym_match_arr[cnt].so = match[0].rm_so;
951 sym_match_arr[cnt].eo = match[0].rm_eo;
952 sym_match_arr[cnt++].sym = sym;
953 }
954 if (sym_match_arr) {
955 qsort(sym_match_arr, cnt, sizeof(struct sym_match), sym_rel_comp);
956 sym_arr = malloc((cnt+1) * sizeof(struct symbol *));
957 if (!sym_arr)
958 goto sym_re_search_free;
959 for (i = 0; i < cnt; i++)
960 sym_arr[i] = sym_match_arr[i].sym;
961 sym_arr[cnt] = NULL;
962 }
963sym_re_search_free:
964 /* sym_match_arr can be NULL if no match, but free(NULL) is OK */
965 free(sym_match_arr);
966 regfree(&re);
967
968 return sym_arr;
969}
970
971/*
972 * When we check for recursive dependencies we use a stack to save
973 * current state so we can print out relevant info to user.
974 * The entries are located on the call stack so no need to free memory.
975 * Note insert() remove() must always match to properly clear the stack.
976 */
977static struct dep_stack {
978 struct dep_stack *prev, *next;
979 struct symbol *sym;
980 struct property *prop;
981 struct expr **expr;
982} *check_top;
983
984static void dep_stack_insert(struct dep_stack *stack, struct symbol *sym)
985{
986 memset(stack, 0, sizeof(*stack));
987 if (check_top)
988 check_top->next = stack;
989 stack->prev = check_top;
990 stack->sym = sym;
991 check_top = stack;
992}
993
994static void dep_stack_remove(void)
995{
996 check_top = check_top->prev;
997 if (check_top)
998 check_top->next = NULL;
999}
1000
1001/*
1002 * Called when we have detected a recursive dependency.
1003 * check_top point to the top of the stact so we use
1004 * the ->prev pointer to locate the bottom of the stack.
1005 */
1006static void sym_check_print_recursive(struct symbol *last_sym)
1007{
1008 struct dep_stack *stack;
1009 struct symbol *sym, *next_sym;
1010 struct menu *menu = NULL;
1011 struct property *prop;
1012 struct dep_stack cv_stack;
1013
1014 if (sym_is_choice_value(last_sym)) {
1015 dep_stack_insert(&cv_stack, last_sym);
1016 last_sym = prop_get_symbol(sym_get_choice_prop(last_sym));
1017 }
1018
1019 for (stack = check_top; stack != NULL; stack = stack->prev)
1020 if (stack->sym == last_sym)
1021 break;
1022 if (!stack) {
1023 fprintf(stderr, "unexpected recursive dependency error\n");
1024 return;
1025 }
1026
1027 for (; stack; stack = stack->next) {
1028 sym = stack->sym;
1029 next_sym = stack->next ? stack->next->sym : last_sym;
1030 prop = stack->prop;
1031 if (prop == NULL)
1032 prop = stack->sym->prop;
1033
1034 /* for choice values find the menu entry (used below) */
1035 if (sym_is_choice(sym) || sym_is_choice_value(sym)) {
1036 for (prop = sym->prop; prop; prop = prop->next) {
1037 menu = prop->menu;
1038 if (prop->menu)
1039 break;
1040 }
1041 }
1042 if (stack->sym == last_sym)
1043 fprintf(stderr, "%s:%d:error: recursive dependency detected!\n",
1044 prop->file->name, prop->lineno);
1045
1046 if (sym_is_choice(sym)) {
1047 fprintf(stderr, "%s:%d:\tchoice %s contains symbol %s\n",
1048 menu->file->name, menu->lineno,
1049 sym->name ? sym->name : "<choice>",
1050 next_sym->name ? next_sym->name : "<choice>");
1051 } else if (sym_is_choice_value(sym)) {
1052 fprintf(stderr, "%s:%d:\tsymbol %s is part of choice %s\n",
1053 menu->file->name, menu->lineno,
1054 sym->name ? sym->name : "<choice>",
1055 next_sym->name ? next_sym->name : "<choice>");
1056 } else if (stack->expr == &sym->dir_dep.expr) {
1057 fprintf(stderr, "%s:%d:\tsymbol %s depends on %s\n",
1058 prop->file->name, prop->lineno,
1059 sym->name ? sym->name : "<choice>",
1060 next_sym->name ? next_sym->name : "<choice>");
1061 } else if (stack->expr == &sym->rev_dep.expr) {
1062 fprintf(stderr, "%s:%d:\tsymbol %s is selected by %s\n",
1063 prop->file->name, prop->lineno,
1064 sym->name ? sym->name : "<choice>",
1065 next_sym->name ? next_sym->name : "<choice>");
1066 } else if (stack->expr == &sym->implied.expr) {
1067 fprintf(stderr, "%s:%d:\tsymbol %s is implied by %s\n",
1068 prop->file->name, prop->lineno,
1069 sym->name ? sym->name : "<choice>",
1070 next_sym->name ? next_sym->name : "<choice>");
1071 } else if (stack->expr) {
1072 fprintf(stderr, "%s:%d:\tsymbol %s %s value contains %s\n",
1073 prop->file->name, prop->lineno,
1074 sym->name ? sym->name : "<choice>",
1075 prop_get_type_name(prop->type),
1076 next_sym->name ? next_sym->name : "<choice>");
1077 } else {
1078 fprintf(stderr, "%s:%d:\tsymbol %s %s is visible depending on %s\n",
1079 prop->file->name, prop->lineno,
1080 sym->name ? sym->name : "<choice>",
1081 prop_get_type_name(prop->type),
1082 next_sym->name ? next_sym->name : "<choice>");
1083 }
1084 }
1085
1086 fprintf(stderr,
1087 "For a resolution refer to Documentation/kbuild/kconfig-language.rst\n"
1088 "subsection \"Kconfig recursive dependency limitations\"\n"
1089 "\n");
1090
1091 if (check_top == &cv_stack)
1092 dep_stack_remove();
1093}
1094
1095static struct symbol *sym_check_expr_deps(struct expr *e)
1096{
1097 struct symbol *sym;
1098
1099 if (!e)
1100 return NULL;
1101 switch (e->type) {
1102 case E_OR:
1103 case E_AND:
1104 sym = sym_check_expr_deps(e->left.expr);
1105 if (sym)
1106 return sym;
1107 return sym_check_expr_deps(e->right.expr);
1108 case E_NOT:
1109 return sym_check_expr_deps(e->left.expr);
1110 case E_EQUAL:
1111 case E_GEQ:
1112 case E_GTH:
1113 case E_LEQ:
1114 case E_LTH:
1115 case E_UNEQUAL:
1116 sym = sym_check_deps(e->left.sym);
1117 if (sym)
1118 return sym;
1119 return sym_check_deps(e->right.sym);
1120 case E_SYMBOL:
1121 return sym_check_deps(e->left.sym);
1122 default:
1123 break;
1124 }
1125 fprintf(stderr, "Oops! How to check %d?\n", e->type);
1126 return NULL;
1127}
1128
1129/* return NULL when dependencies are OK */
1130static struct symbol *sym_check_sym_deps(struct symbol *sym)
1131{
1132 struct symbol *sym2;
1133 struct property *prop;
1134 struct dep_stack stack;
1135
1136 dep_stack_insert(&stack, sym);
1137
1138 stack.expr = &sym->dir_dep.expr;
1139 sym2 = sym_check_expr_deps(sym->dir_dep.expr);
1140 if (sym2)
1141 goto out;
1142
1143 stack.expr = &sym->rev_dep.expr;
1144 sym2 = sym_check_expr_deps(sym->rev_dep.expr);
1145 if (sym2)
1146 goto out;
1147
1148 stack.expr = &sym->implied.expr;
1149 sym2 = sym_check_expr_deps(sym->implied.expr);
1150 if (sym2)
1151 goto out;
1152
1153 stack.expr = NULL;
1154
1155 for (prop = sym->prop; prop; prop = prop->next) {
1156 if (prop->type == P_CHOICE || prop->type == P_SELECT ||
1157 prop->type == P_IMPLY)
1158 continue;
1159 stack.prop = prop;
1160 sym2 = sym_check_expr_deps(prop->visible.expr);
1161 if (sym2)
1162 break;
1163 if (prop->type != P_DEFAULT || sym_is_choice(sym))
1164 continue;
1165 stack.expr = &prop->expr;
1166 sym2 = sym_check_expr_deps(prop->expr);
1167 if (sym2)
1168 break;
1169 stack.expr = NULL;
1170 }
1171
1172out:
1173 dep_stack_remove();
1174
1175 return sym2;
1176}
1177
1178static struct symbol *sym_check_choice_deps(struct symbol *choice)
1179{
1180 struct symbol *sym, *sym2;
1181 struct property *prop;
1182 struct expr *e;
1183 struct dep_stack stack;
1184
1185 dep_stack_insert(&stack, choice);
1186
1187 prop = sym_get_choice_prop(choice);
1188 expr_list_for_each_sym(prop->expr, e, sym)
1189 sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
1190
1191 choice->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
1192 sym2 = sym_check_sym_deps(choice);
1193 choice->flags &= ~SYMBOL_CHECK;
1194 if (sym2)
1195 goto out;
1196
1197 expr_list_for_each_sym(prop->expr, e, sym) {
1198 sym2 = sym_check_sym_deps(sym);
1199 if (sym2)
1200 break;
1201 }
1202out:
1203 expr_list_for_each_sym(prop->expr, e, sym)
1204 sym->flags &= ~SYMBOL_CHECK;
1205
1206 if (sym2 && sym_is_choice_value(sym2) &&
1207 prop_get_symbol(sym_get_choice_prop(sym2)) == choice)
1208 sym2 = choice;
1209
1210 dep_stack_remove();
1211
1212 return sym2;
1213}
1214
1215struct symbol *sym_check_deps(struct symbol *sym)
1216{
1217 struct symbol *sym2;
1218 struct property *prop;
1219
1220 if (sym->flags & SYMBOL_CHECK) {
1221 sym_check_print_recursive(sym);
1222 return sym;
1223 }
1224 if (sym->flags & SYMBOL_CHECKED)
1225 return NULL;
1226
1227 if (sym_is_choice_value(sym)) {
1228 struct dep_stack stack;
1229
1230 /* for choice groups start the check with main choice symbol */
1231 dep_stack_insert(&stack, sym);
1232 prop = sym_get_choice_prop(sym);
1233 sym2 = sym_check_deps(prop_get_symbol(prop));
1234 dep_stack_remove();
1235 } else if (sym_is_choice(sym)) {
1236 sym2 = sym_check_choice_deps(sym);
1237 } else {
1238 sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
1239 sym2 = sym_check_sym_deps(sym);
1240 sym->flags &= ~SYMBOL_CHECK;
1241 }
1242
1243 return sym2;
1244}
1245
1246struct symbol *prop_get_symbol(struct property *prop)
1247{
1248 if (prop->expr && (prop->expr->type == E_SYMBOL ||
1249 prop->expr->type == E_LIST))
1250 return prop->expr->left.sym;
1251 return NULL;
1252}
1253
1254const char *prop_get_type_name(enum prop_type type)
1255{
1256 switch (type) {
1257 case P_PROMPT:
1258 return "prompt";
1259 case P_COMMENT:
1260 return "comment";
1261 case P_MENU:
1262 return "menu";
1263 case P_DEFAULT:
1264 return "default";
1265 case P_CHOICE:
1266 return "choice";
1267 case P_SELECT:
1268 return "select";
1269 case P_IMPLY:
1270 return "imply";
1271 case P_RANGE:
1272 return "range";
1273 case P_SYMBOL:
1274 return "symbol";
1275 case P_UNKNOWN:
1276 break;
1277 }
1278 return "unknown";
1279}
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
266 /* first calculate all choice values' visibilities */
267 prop = sym_get_choice_prop(sym);
268 expr_list_for_each_sym(prop->expr, e, def_sym)
269 sym_calc_visibility(def_sym);
270
271 /* is the user choice visible? */
272 def_sym = sym->def[S_DEF_USER].val;
273 if (def_sym && def_sym->visible != no)
274 return def_sym;
275
276 def_sym = sym_choice_default(sym);
277
278 if (def_sym == NULL)
279 /* no choice? reset tristate value */
280 sym->curr.tri = no;
281
282 return def_sym;
283}
284
285void sym_calc_value(struct symbol *sym)
286{
287 struct symbol_value newval, oldval;
288 struct property *prop;
289 struct expr *e;
290
291 if (!sym)
292 return;
293
294 if (sym->flags & SYMBOL_VALID)
295 return;
296 sym->flags |= SYMBOL_VALID;
297
298 oldval = sym->curr;
299
300 switch (sym->type) {
301 case S_INT:
302 case S_HEX:
303 case S_STRING:
304 newval = symbol_empty.curr;
305 break;
306 case S_BOOLEAN:
307 case S_TRISTATE:
308 newval = symbol_no.curr;
309 break;
310 default:
311 sym->curr.val = sym->name;
312 sym->curr.tri = no;
313 return;
314 }
315 if (!sym_is_choice_value(sym))
316 sym->flags &= ~SYMBOL_WRITE;
317
318 sym_calc_visibility(sym);
319
320 /* set default if recursively called */
321 sym->curr = newval;
322
323 switch (sym_get_type(sym)) {
324 case S_BOOLEAN:
325 case S_TRISTATE:
326 if (sym_is_choice_value(sym) && sym->visible == yes) {
327 prop = sym_get_choice_prop(sym);
328 newval.tri = (prop_get_symbol(prop)->curr.val == sym) ? yes : no;
329 } else {
330 if (sym->visible != no) {
331 /* if the symbol is visible use the user value
332 * if available, otherwise try the default value
333 */
334 sym->flags |= SYMBOL_WRITE;
335 if (sym_has_value(sym)) {
336 newval.tri = EXPR_AND(sym->def[S_DEF_USER].tri,
337 sym->visible);
338 goto calc_newval;
339 }
340 }
341 if (sym->rev_dep.tri != no)
342 sym->flags |= SYMBOL_WRITE;
343 if (!sym_is_choice(sym)) {
344 prop = sym_get_default_prop(sym);
345 if (prop) {
346 sym->flags |= SYMBOL_WRITE;
347 newval.tri = EXPR_AND(expr_calc_value(prop->expr),
348 prop->visible.tri);
349 }
350 }
351 calc_newval:
352 if (sym->dir_dep.tri == no && sym->rev_dep.tri != no) {
353 struct expr *e;
354 e = expr_simplify_unmet_dep(sym->rev_dep.expr,
355 sym->dir_dep.expr);
356 fprintf(stderr, "warning: (");
357 expr_fprint(e, stderr);
358 fprintf(stderr, ") selects %s which has unmet direct dependencies (",
359 sym->name);
360 expr_fprint(sym->dir_dep.expr, stderr);
361 fprintf(stderr, ")\n");
362 expr_free(e);
363 }
364 newval.tri = EXPR_OR(newval.tri, sym->rev_dep.tri);
365 }
366 if (newval.tri == mod && sym_get_type(sym) == S_BOOLEAN)
367 newval.tri = yes;
368 break;
369 case S_STRING:
370 case S_HEX:
371 case S_INT:
372 if (sym->visible != no) {
373 sym->flags |= SYMBOL_WRITE;
374 if (sym_has_value(sym)) {
375 newval.val = sym->def[S_DEF_USER].val;
376 break;
377 }
378 }
379 prop = sym_get_default_prop(sym);
380 if (prop) {
381 struct symbol *ds = prop_get_symbol(prop);
382 if (ds) {
383 sym->flags |= SYMBOL_WRITE;
384 sym_calc_value(ds);
385 newval.val = ds->curr.val;
386 }
387 }
388 break;
389 default:
390 ;
391 }
392
393 sym->curr = newval;
394 if (sym_is_choice(sym) && newval.tri == yes)
395 sym->curr.val = sym_calc_choice(sym);
396 sym_validate_range(sym);
397
398 if (memcmp(&oldval, &sym->curr, sizeof(oldval))) {
399 sym_set_changed(sym);
400 if (modules_sym == sym) {
401 sym_set_all_changed();
402 modules_val = modules_sym->curr.tri;
403 }
404 }
405
406 if (sym_is_choice(sym)) {
407 struct symbol *choice_sym;
408
409 prop = sym_get_choice_prop(sym);
410 expr_list_for_each_sym(prop->expr, e, choice_sym) {
411 if ((sym->flags & SYMBOL_WRITE) &&
412 choice_sym->visible != no)
413 choice_sym->flags |= SYMBOL_WRITE;
414 if (sym->flags & SYMBOL_CHANGED)
415 sym_set_changed(choice_sym);
416 }
417 }
418
419 if (sym->flags & SYMBOL_AUTO)
420 sym->flags &= ~SYMBOL_WRITE;
421}
422
423void sym_clear_all_valid(void)
424{
425 struct symbol *sym;
426 int i;
427
428 for_all_symbols(i, sym)
429 sym->flags &= ~SYMBOL_VALID;
430 sym_add_change_count(1);
431 if (modules_sym)
432 sym_calc_value(modules_sym);
433}
434
435void sym_set_changed(struct symbol *sym)
436{
437 struct property *prop;
438
439 sym->flags |= SYMBOL_CHANGED;
440 for (prop = sym->prop; prop; prop = prop->next) {
441 if (prop->menu)
442 prop->menu->flags |= MENU_CHANGED;
443 }
444}
445
446void sym_set_all_changed(void)
447{
448 struct symbol *sym;
449 int i;
450
451 for_all_symbols(i, sym)
452 sym_set_changed(sym);
453}
454
455bool sym_tristate_within_range(struct symbol *sym, tristate val)
456{
457 int type = sym_get_type(sym);
458
459 if (sym->visible == no)
460 return false;
461
462 if (type != S_BOOLEAN && type != S_TRISTATE)
463 return false;
464
465 if (type == S_BOOLEAN && val == mod)
466 return false;
467 if (sym->visible <= sym->rev_dep.tri)
468 return false;
469 if (sym_is_choice_value(sym) && sym->visible == yes)
470 return val == yes;
471 return val >= sym->rev_dep.tri && val <= sym->visible;
472}
473
474bool sym_set_tristate_value(struct symbol *sym, tristate val)
475{
476 tristate oldval = sym_get_tristate_value(sym);
477
478 if (oldval != val && !sym_tristate_within_range(sym, val))
479 return false;
480
481 if (!(sym->flags & SYMBOL_DEF_USER)) {
482 sym->flags |= SYMBOL_DEF_USER;
483 sym_set_changed(sym);
484 }
485 /*
486 * setting a choice value also resets the new flag of the choice
487 * symbol and all other choice values.
488 */
489 if (sym_is_choice_value(sym) && val == yes) {
490 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
491 struct property *prop;
492 struct expr *e;
493
494 cs->def[S_DEF_USER].val = sym;
495 cs->flags |= SYMBOL_DEF_USER;
496 prop = sym_get_choice_prop(cs);
497 for (e = prop->expr; e; e = e->left.expr) {
498 if (e->right.sym->visible != no)
499 e->right.sym->flags |= SYMBOL_DEF_USER;
500 }
501 }
502
503 sym->def[S_DEF_USER].tri = val;
504 if (oldval != val)
505 sym_clear_all_valid();
506
507 return true;
508}
509
510tristate sym_toggle_tristate_value(struct symbol *sym)
511{
512 tristate oldval, newval;
513
514 oldval = newval = sym_get_tristate_value(sym);
515 do {
516 switch (newval) {
517 case no:
518 newval = mod;
519 break;
520 case mod:
521 newval = yes;
522 break;
523 case yes:
524 newval = no;
525 break;
526 }
527 if (sym_set_tristate_value(sym, newval))
528 break;
529 } while (oldval != newval);
530 return newval;
531}
532
533bool sym_string_valid(struct symbol *sym, const char *str)
534{
535 signed char ch;
536
537 switch (sym->type) {
538 case S_STRING:
539 return true;
540 case S_INT:
541 ch = *str++;
542 if (ch == '-')
543 ch = *str++;
544 if (!isdigit(ch))
545 return false;
546 if (ch == '0' && *str != 0)
547 return false;
548 while ((ch = *str++)) {
549 if (!isdigit(ch))
550 return false;
551 }
552 return true;
553 case S_HEX:
554 if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
555 str += 2;
556 ch = *str++;
557 do {
558 if (!isxdigit(ch))
559 return false;
560 } while ((ch = *str++));
561 return true;
562 case S_BOOLEAN:
563 case S_TRISTATE:
564 switch (str[0]) {
565 case 'y': case 'Y':
566 case 'm': case 'M':
567 case 'n': case 'N':
568 return true;
569 }
570 return false;
571 default:
572 return false;
573 }
574}
575
576bool sym_string_within_range(struct symbol *sym, const char *str)
577{
578 struct property *prop;
579 int val;
580
581 switch (sym->type) {
582 case S_STRING:
583 return sym_string_valid(sym, str);
584 case S_INT:
585 if (!sym_string_valid(sym, str))
586 return false;
587 prop = sym_get_range_prop(sym);
588 if (!prop)
589 return true;
590 val = strtol(str, NULL, 10);
591 return val >= sym_get_range_val(prop->expr->left.sym, 10) &&
592 val <= sym_get_range_val(prop->expr->right.sym, 10);
593 case S_HEX:
594 if (!sym_string_valid(sym, str))
595 return false;
596 prop = sym_get_range_prop(sym);
597 if (!prop)
598 return true;
599 val = strtol(str, NULL, 16);
600 return val >= sym_get_range_val(prop->expr->left.sym, 16) &&
601 val <= sym_get_range_val(prop->expr->right.sym, 16);
602 case S_BOOLEAN:
603 case S_TRISTATE:
604 switch (str[0]) {
605 case 'y': case 'Y':
606 return sym_tristate_within_range(sym, yes);
607 case 'm': case 'M':
608 return sym_tristate_within_range(sym, mod);
609 case 'n': case 'N':
610 return sym_tristate_within_range(sym, no);
611 }
612 return false;
613 default:
614 return false;
615 }
616}
617
618bool sym_set_string_value(struct symbol *sym, const char *newval)
619{
620 const char *oldval;
621 char *val;
622 int size;
623
624 switch (sym->type) {
625 case S_BOOLEAN:
626 case S_TRISTATE:
627 switch (newval[0]) {
628 case 'y': case 'Y':
629 return sym_set_tristate_value(sym, yes);
630 case 'm': case 'M':
631 return sym_set_tristate_value(sym, mod);
632 case 'n': case 'N':
633 return sym_set_tristate_value(sym, no);
634 }
635 return false;
636 default:
637 ;
638 }
639
640 if (!sym_string_within_range(sym, newval))
641 return false;
642
643 if (!(sym->flags & SYMBOL_DEF_USER)) {
644 sym->flags |= SYMBOL_DEF_USER;
645 sym_set_changed(sym);
646 }
647
648 oldval = sym->def[S_DEF_USER].val;
649 size = strlen(newval) + 1;
650 if (sym->type == S_HEX && (newval[0] != '0' || (newval[1] != 'x' && newval[1] != 'X'))) {
651 size += 2;
652 sym->def[S_DEF_USER].val = val = malloc(size);
653 *val++ = '0';
654 *val++ = 'x';
655 } else if (!oldval || strcmp(oldval, newval))
656 sym->def[S_DEF_USER].val = val = malloc(size);
657 else
658 return true;
659
660 strcpy(val, newval);
661 free((void *)oldval);
662 sym_clear_all_valid();
663
664 return true;
665}
666
667/*
668 * Find the default value associated to a symbol.
669 * For tristate symbol handle the modules=n case
670 * in which case "m" becomes "y".
671 * If the symbol does not have any default then fallback
672 * to the fixed default values.
673 */
674const char *sym_get_string_default(struct symbol *sym)
675{
676 struct property *prop;
677 struct symbol *ds;
678 const char *str;
679 tristate val;
680
681 sym_calc_visibility(sym);
682 sym_calc_value(modules_sym);
683 val = symbol_no.curr.tri;
684 str = symbol_empty.curr.val;
685
686 /* If symbol has a default value look it up */
687 prop = sym_get_default_prop(sym);
688 if (prop != NULL) {
689 switch (sym->type) {
690 case S_BOOLEAN:
691 case S_TRISTATE:
692 /* The visibility may limit the value from yes => mod */
693 val = EXPR_AND(expr_calc_value(prop->expr), prop->visible.tri);
694 break;
695 default:
696 /*
697 * The following fails to handle the situation
698 * where a default value is further limited by
699 * the valid range.
700 */
701 ds = prop_get_symbol(prop);
702 if (ds != NULL) {
703 sym_calc_value(ds);
704 str = (const char *)ds->curr.val;
705 }
706 }
707 }
708
709 /* Handle select statements */
710 val = EXPR_OR(val, sym->rev_dep.tri);
711
712 /* transpose mod to yes if modules are not enabled */
713 if (val == mod)
714 if (!sym_is_choice_value(sym) && modules_sym->curr.tri == no)
715 val = yes;
716
717 /* transpose mod to yes if type is bool */
718 if (sym->type == S_BOOLEAN && val == mod)
719 val = yes;
720
721 switch (sym->type) {
722 case S_BOOLEAN:
723 case S_TRISTATE:
724 switch (val) {
725 case no: return "n";
726 case mod: return "m";
727 case yes: return "y";
728 }
729 case S_INT:
730 case S_HEX:
731 return str;
732 case S_STRING:
733 return str;
734 case S_OTHER:
735 case S_UNKNOWN:
736 break;
737 }
738 return "";
739}
740
741const char *sym_get_string_value(struct symbol *sym)
742{
743 tristate val;
744
745 switch (sym->type) {
746 case S_BOOLEAN:
747 case S_TRISTATE:
748 val = sym_get_tristate_value(sym);
749 switch (val) {
750 case no:
751 return "n";
752 case mod:
753 sym_calc_value(modules_sym);
754 return (modules_sym->curr.tri == no) ? "n" : "m";
755 case yes:
756 return "y";
757 }
758 break;
759 default:
760 ;
761 }
762 return (const char *)sym->curr.val;
763}
764
765bool sym_is_changable(struct symbol *sym)
766{
767 return sym->visible > sym->rev_dep.tri;
768}
769
770static unsigned strhash(const char *s)
771{
772 /* fnv32 hash */
773 unsigned hash = 2166136261U;
774 for (; *s; s++)
775 hash = (hash ^ *s) * 0x01000193;
776 return hash;
777}
778
779struct symbol *sym_lookup(const char *name, int flags)
780{
781 struct symbol *symbol;
782 char *new_name;
783 int hash;
784
785 if (name) {
786 if (name[0] && !name[1]) {
787 switch (name[0]) {
788 case 'y': return &symbol_yes;
789 case 'm': return &symbol_mod;
790 case 'n': return &symbol_no;
791 }
792 }
793 hash = strhash(name) % SYMBOL_HASHSIZE;
794
795 for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
796 if (symbol->name &&
797 !strcmp(symbol->name, name) &&
798 (flags ? symbol->flags & flags
799 : !(symbol->flags & (SYMBOL_CONST|SYMBOL_CHOICE))))
800 return symbol;
801 }
802 new_name = strdup(name);
803 } else {
804 new_name = NULL;
805 hash = 0;
806 }
807
808 symbol = malloc(sizeof(*symbol));
809 memset(symbol, 0, sizeof(*symbol));
810 symbol->name = new_name;
811 symbol->type = S_UNKNOWN;
812 symbol->flags |= flags;
813
814 symbol->next = symbol_hash[hash];
815 symbol_hash[hash] = symbol;
816
817 return symbol;
818}
819
820struct symbol *sym_find(const char *name)
821{
822 struct symbol *symbol = NULL;
823 int hash = 0;
824
825 if (!name)
826 return NULL;
827
828 if (name[0] && !name[1]) {
829 switch (name[0]) {
830 case 'y': return &symbol_yes;
831 case 'm': return &symbol_mod;
832 case 'n': return &symbol_no;
833 }
834 }
835 hash = strhash(name) % SYMBOL_HASHSIZE;
836
837 for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
838 if (symbol->name &&
839 !strcmp(symbol->name, name) &&
840 !(symbol->flags & SYMBOL_CONST))
841 break;
842 }
843
844 return symbol;
845}
846
847/*
848 * Expand symbol's names embedded in the string given in argument. Symbols'
849 * name to be expanded shall be prefixed by a '$'. Unknown symbol expands to
850 * the empty string.
851 */
852const char *sym_expand_string_value(const char *in)
853{
854 const char *src;
855 char *res;
856 size_t reslen;
857
858 reslen = strlen(in) + 1;
859 res = malloc(reslen);
860 res[0] = '\0';
861
862 while ((src = strchr(in, '$'))) {
863 char *p, name[SYMBOL_MAXLENGTH];
864 const char *symval = "";
865 struct symbol *sym;
866 size_t newlen;
867
868 strncat(res, in, src - in);
869 src++;
870
871 p = name;
872 while (isalnum(*src) || *src == '_')
873 *p++ = *src++;
874 *p = '\0';
875
876 sym = sym_find(name);
877 if (sym != NULL) {
878 sym_calc_value(sym);
879 symval = sym_get_string_value(sym);
880 }
881
882 newlen = strlen(res) + strlen(symval) + strlen(src) + 1;
883 if (newlen > reslen) {
884 reslen = newlen;
885 res = realloc(res, reslen);
886 }
887
888 strcat(res, symval);
889 in = src;
890 }
891 strcat(res, in);
892
893 return res;
894}
895
896const char *sym_escape_string_value(const char *in)
897{
898 const char *p;
899 size_t reslen;
900 char *res;
901 size_t l;
902
903 reslen = strlen(in) + strlen("\"\"") + 1;
904
905 p = in;
906 for (;;) {
907 l = strcspn(p, "\"\\");
908 p += l;
909
910 if (p[0] == '\0')
911 break;
912
913 reslen++;
914 p++;
915 }
916
917 res = malloc(reslen);
918 res[0] = '\0';
919
920 strcat(res, "\"");
921
922 p = in;
923 for (;;) {
924 l = strcspn(p, "\"\\");
925 strncat(res, p, l);
926 p += l;
927
928 if (p[0] == '\0')
929 break;
930
931 strcat(res, "\\");
932 strncat(res, p++, 1);
933 }
934
935 strcat(res, "\"");
936 return res;
937}
938
939struct symbol **sym_re_search(const char *pattern)
940{
941 struct symbol *sym, **sym_arr = NULL;
942 int i, cnt, size;
943 regex_t re;
944
945 cnt = size = 0;
946 /* Skip if empty */
947 if (strlen(pattern) == 0)
948 return NULL;
949 if (regcomp(&re, pattern, REG_EXTENDED|REG_NOSUB|REG_ICASE))
950 return NULL;
951
952 for_all_symbols(i, sym) {
953 if (sym->flags & SYMBOL_CONST || !sym->name)
954 continue;
955 if (regexec(&re, sym->name, 0, NULL, 0))
956 continue;
957 if (cnt + 1 >= size) {
958 void *tmp = sym_arr;
959 size += 16;
960 sym_arr = realloc(sym_arr, size * sizeof(struct symbol *));
961 if (!sym_arr) {
962 free(tmp);
963 return NULL;
964 }
965 }
966 sym_calc_value(sym);
967 sym_arr[cnt++] = sym;
968 }
969 if (sym_arr)
970 sym_arr[cnt] = NULL;
971 regfree(&re);
972
973 return sym_arr;
974}
975
976/*
977 * When we check for recursive dependencies we use a stack to save
978 * current state so we can print out relevant info to user.
979 * The entries are located on the call stack so no need to free memory.
980 * Note inser() remove() must always match to properly clear the stack.
981 */
982static struct dep_stack {
983 struct dep_stack *prev, *next;
984 struct symbol *sym;
985 struct property *prop;
986 struct expr *expr;
987} *check_top;
988
989static void dep_stack_insert(struct dep_stack *stack, struct symbol *sym)
990{
991 memset(stack, 0, sizeof(*stack));
992 if (check_top)
993 check_top->next = stack;
994 stack->prev = check_top;
995 stack->sym = sym;
996 check_top = stack;
997}
998
999static void dep_stack_remove(void)
1000{
1001 check_top = check_top->prev;
1002 if (check_top)
1003 check_top->next = NULL;
1004}
1005
1006/*
1007 * Called when we have detected a recursive dependency.
1008 * check_top point to the top of the stact so we use
1009 * the ->prev pointer to locate the bottom of the stack.
1010 */
1011static void sym_check_print_recursive(struct symbol *last_sym)
1012{
1013 struct dep_stack *stack;
1014 struct symbol *sym, *next_sym;
1015 struct menu *menu = NULL;
1016 struct property *prop;
1017 struct dep_stack cv_stack;
1018
1019 if (sym_is_choice_value(last_sym)) {
1020 dep_stack_insert(&cv_stack, last_sym);
1021 last_sym = prop_get_symbol(sym_get_choice_prop(last_sym));
1022 }
1023
1024 for (stack = check_top; stack != NULL; stack = stack->prev)
1025 if (stack->sym == last_sym)
1026 break;
1027 if (!stack) {
1028 fprintf(stderr, "unexpected recursive dependency error\n");
1029 return;
1030 }
1031
1032 for (; stack; stack = stack->next) {
1033 sym = stack->sym;
1034 next_sym = stack->next ? stack->next->sym : last_sym;
1035 prop = stack->prop;
1036 if (prop == NULL)
1037 prop = stack->sym->prop;
1038
1039 /* for choice values find the menu entry (used below) */
1040 if (sym_is_choice(sym) || sym_is_choice_value(sym)) {
1041 for (prop = sym->prop; prop; prop = prop->next) {
1042 menu = prop->menu;
1043 if (prop->menu)
1044 break;
1045 }
1046 }
1047 if (stack->sym == last_sym)
1048 fprintf(stderr, "%s:%d:error: recursive dependency detected!\n",
1049 prop->file->name, prop->lineno);
1050 if (stack->expr) {
1051 fprintf(stderr, "%s:%d:\tsymbol %s %s value contains %s\n",
1052 prop->file->name, prop->lineno,
1053 sym->name ? sym->name : "<choice>",
1054 prop_get_type_name(prop->type),
1055 next_sym->name ? next_sym->name : "<choice>");
1056 } else if (stack->prop) {
1057 fprintf(stderr, "%s:%d:\tsymbol %s depends on %s\n",
1058 prop->file->name, prop->lineno,
1059 sym->name ? sym->name : "<choice>",
1060 next_sym->name ? next_sym->name : "<choice>");
1061 } else if (sym_is_choice(sym)) {
1062 fprintf(stderr, "%s:%d:\tchoice %s contains symbol %s\n",
1063 menu->file->name, menu->lineno,
1064 sym->name ? sym->name : "<choice>",
1065 next_sym->name ? next_sym->name : "<choice>");
1066 } else if (sym_is_choice_value(sym)) {
1067 fprintf(stderr, "%s:%d:\tsymbol %s is part of choice %s\n",
1068 menu->file->name, menu->lineno,
1069 sym->name ? sym->name : "<choice>",
1070 next_sym->name ? next_sym->name : "<choice>");
1071 } else {
1072 fprintf(stderr, "%s:%d:\tsymbol %s is selected by %s\n",
1073 prop->file->name, prop->lineno,
1074 sym->name ? sym->name : "<choice>",
1075 next_sym->name ? next_sym->name : "<choice>");
1076 }
1077 }
1078
1079 if (check_top == &cv_stack)
1080 dep_stack_remove();
1081}
1082
1083static struct symbol *sym_check_expr_deps(struct expr *e)
1084{
1085 struct symbol *sym;
1086
1087 if (!e)
1088 return NULL;
1089 switch (e->type) {
1090 case E_OR:
1091 case E_AND:
1092 sym = sym_check_expr_deps(e->left.expr);
1093 if (sym)
1094 return sym;
1095 return sym_check_expr_deps(e->right.expr);
1096 case E_NOT:
1097 return sym_check_expr_deps(e->left.expr);
1098 case E_EQUAL:
1099 case E_UNEQUAL:
1100 sym = sym_check_deps(e->left.sym);
1101 if (sym)
1102 return sym;
1103 return sym_check_deps(e->right.sym);
1104 case E_SYMBOL:
1105 return sym_check_deps(e->left.sym);
1106 default:
1107 break;
1108 }
1109 printf("Oops! How to check %d?\n", e->type);
1110 return NULL;
1111}
1112
1113/* return NULL when dependencies are OK */
1114static struct symbol *sym_check_sym_deps(struct symbol *sym)
1115{
1116 struct symbol *sym2;
1117 struct property *prop;
1118 struct dep_stack stack;
1119
1120 dep_stack_insert(&stack, sym);
1121
1122 sym2 = sym_check_expr_deps(sym->rev_dep.expr);
1123 if (sym2)
1124 goto out;
1125
1126 for (prop = sym->prop; prop; prop = prop->next) {
1127 if (prop->type == P_CHOICE || prop->type == P_SELECT)
1128 continue;
1129 stack.prop = prop;
1130 sym2 = sym_check_expr_deps(prop->visible.expr);
1131 if (sym2)
1132 break;
1133 if (prop->type != P_DEFAULT || sym_is_choice(sym))
1134 continue;
1135 stack.expr = prop->expr;
1136 sym2 = sym_check_expr_deps(prop->expr);
1137 if (sym2)
1138 break;
1139 stack.expr = NULL;
1140 }
1141
1142out:
1143 dep_stack_remove();
1144
1145 return sym2;
1146}
1147
1148static struct symbol *sym_check_choice_deps(struct symbol *choice)
1149{
1150 struct symbol *sym, *sym2;
1151 struct property *prop;
1152 struct expr *e;
1153 struct dep_stack stack;
1154
1155 dep_stack_insert(&stack, choice);
1156
1157 prop = sym_get_choice_prop(choice);
1158 expr_list_for_each_sym(prop->expr, e, sym)
1159 sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
1160
1161 choice->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
1162 sym2 = sym_check_sym_deps(choice);
1163 choice->flags &= ~SYMBOL_CHECK;
1164 if (sym2)
1165 goto out;
1166
1167 expr_list_for_each_sym(prop->expr, e, sym) {
1168 sym2 = sym_check_sym_deps(sym);
1169 if (sym2)
1170 break;
1171 }
1172out:
1173 expr_list_for_each_sym(prop->expr, e, sym)
1174 sym->flags &= ~SYMBOL_CHECK;
1175
1176 if (sym2 && sym_is_choice_value(sym2) &&
1177 prop_get_symbol(sym_get_choice_prop(sym2)) == choice)
1178 sym2 = choice;
1179
1180 dep_stack_remove();
1181
1182 return sym2;
1183}
1184
1185struct symbol *sym_check_deps(struct symbol *sym)
1186{
1187 struct symbol *sym2;
1188 struct property *prop;
1189
1190 if (sym->flags & SYMBOL_CHECK) {
1191 sym_check_print_recursive(sym);
1192 return sym;
1193 }
1194 if (sym->flags & SYMBOL_CHECKED)
1195 return NULL;
1196
1197 if (sym_is_choice_value(sym)) {
1198 struct dep_stack stack;
1199
1200 /* for choice groups start the check with main choice symbol */
1201 dep_stack_insert(&stack, sym);
1202 prop = sym_get_choice_prop(sym);
1203 sym2 = sym_check_deps(prop_get_symbol(prop));
1204 dep_stack_remove();
1205 } else if (sym_is_choice(sym)) {
1206 sym2 = sym_check_choice_deps(sym);
1207 } else {
1208 sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
1209 sym2 = sym_check_sym_deps(sym);
1210 sym->flags &= ~SYMBOL_CHECK;
1211 }
1212
1213 if (sym2 && sym2 == sym)
1214 sym2 = NULL;
1215
1216 return sym2;
1217}
1218
1219struct property *prop_alloc(enum prop_type type, struct symbol *sym)
1220{
1221 struct property *prop;
1222 struct property **propp;
1223
1224 prop = malloc(sizeof(*prop));
1225 memset(prop, 0, sizeof(*prop));
1226 prop->type = type;
1227 prop->sym = sym;
1228 prop->file = current_file;
1229 prop->lineno = zconf_lineno();
1230
1231 /* append property to the prop list of symbol */
1232 if (sym) {
1233 for (propp = &sym->prop; *propp; propp = &(*propp)->next)
1234 ;
1235 *propp = prop;
1236 }
1237
1238 return prop;
1239}
1240
1241struct symbol *prop_get_symbol(struct property *prop)
1242{
1243 if (prop->expr && (prop->expr->type == E_SYMBOL ||
1244 prop->expr->type == E_LIST))
1245 return prop->expr->left.sym;
1246 return NULL;
1247}
1248
1249const char *prop_get_type_name(enum prop_type type)
1250{
1251 switch (type) {
1252 case P_PROMPT:
1253 return "prompt";
1254 case P_ENV:
1255 return "env";
1256 case P_COMMENT:
1257 return "comment";
1258 case P_MENU:
1259 return "menu";
1260 case P_DEFAULT:
1261 return "default";
1262 case P_CHOICE:
1263 return "choice";
1264 case P_SELECT:
1265 return "select";
1266 case P_RANGE:
1267 return "range";
1268 case P_SYMBOL:
1269 return "symbol";
1270 case P_UNKNOWN:
1271 break;
1272 }
1273 return "unknown";
1274}
1275
1276static void prop_add_env(const char *env)
1277{
1278 struct symbol *sym, *sym2;
1279 struct property *prop;
1280 char *p;
1281
1282 sym = current_entry->sym;
1283 sym->flags |= SYMBOL_AUTO;
1284 for_all_properties(sym, prop, P_ENV) {
1285 sym2 = prop_get_symbol(prop);
1286 if (strcmp(sym2->name, env))
1287 menu_warn(current_entry, "redefining environment symbol from %s",
1288 sym2->name);
1289 return;
1290 }
1291
1292 prop = prop_alloc(P_ENV, sym);
1293 prop->expr = expr_alloc_symbol(sym_lookup(env, SYMBOL_CONST));
1294
1295 sym_env_list = expr_alloc_one(E_LIST, sym_env_list);
1296 sym_env_list->right.sym = sym;
1297
1298 p = getenv(env);
1299 if (p)
1300 sym_add_default(sym, p);
1301 else
1302 menu_warn(current_entry, "environment variable %s undefined", env);
1303}