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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 <stdarg.h>
8#include <stdlib.h>
9#include <string.h>
10
11#include "lkc.h"
12
13static const char nohelp_text[] = "There is no help available for this option.";
14
15struct menu rootmenu;
16static struct menu **last_entry_ptr;
17
18struct file *file_list;
19struct file *current_file;
20
21void menu_warn(struct menu *menu, const char *fmt, ...)
22{
23 va_list ap;
24 va_start(ap, fmt);
25 fprintf(stderr, "%s:%d:warning: ", menu->file->name, menu->lineno);
26 vfprintf(stderr, fmt, ap);
27 fprintf(stderr, "\n");
28 va_end(ap);
29}
30
31static void prop_warn(struct property *prop, const char *fmt, ...)
32{
33 va_list ap;
34 va_start(ap, fmt);
35 fprintf(stderr, "%s:%d:warning: ", prop->file->name, prop->lineno);
36 vfprintf(stderr, fmt, ap);
37 fprintf(stderr, "\n");
38 va_end(ap);
39}
40
41void _menu_init(void)
42{
43 current_entry = current_menu = &rootmenu;
44 last_entry_ptr = &rootmenu.list;
45}
46
47void menu_add_entry(struct symbol *sym)
48{
49 struct menu *menu;
50
51 menu = xmalloc(sizeof(*menu));
52 memset(menu, 0, sizeof(*menu));
53 menu->sym = sym;
54 menu->parent = current_menu;
55 menu->file = current_file;
56 menu->lineno = zconf_lineno();
57
58 *last_entry_ptr = menu;
59 last_entry_ptr = &menu->next;
60 current_entry = menu;
61 if (sym)
62 menu_add_symbol(P_SYMBOL, sym, NULL);
63}
64
65struct menu *menu_add_menu(void)
66{
67 last_entry_ptr = ¤t_entry->list;
68 current_menu = current_entry;
69 return current_menu;
70}
71
72void menu_end_menu(void)
73{
74 last_entry_ptr = ¤t_menu->next;
75 current_menu = current_menu->parent;
76}
77
78/*
79 * Rewrites 'm' to 'm' && MODULES, so that it evaluates to 'n' when running
80 * without modules
81 */
82static struct expr *rewrite_m(struct expr *e)
83{
84 if (!e)
85 return e;
86
87 switch (e->type) {
88 case E_NOT:
89 e->left.expr = rewrite_m(e->left.expr);
90 break;
91 case E_OR:
92 case E_AND:
93 e->left.expr = rewrite_m(e->left.expr);
94 e->right.expr = rewrite_m(e->right.expr);
95 break;
96 case E_SYMBOL:
97 /* change 'm' into 'm' && MODULES */
98 if (e->left.sym == &symbol_mod)
99 return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
100 break;
101 default:
102 break;
103 }
104 return e;
105}
106
107void menu_add_dep(struct expr *dep)
108{
109 current_entry->dep = expr_alloc_and(current_entry->dep, dep);
110}
111
112void menu_set_type(int type)
113{
114 struct symbol *sym = current_entry->sym;
115
116 if (sym->type == type)
117 return;
118 if (sym->type == S_UNKNOWN) {
119 sym->type = type;
120 return;
121 }
122 menu_warn(current_entry,
123 "ignoring type redefinition of '%s' from '%s' to '%s'",
124 sym->name ? sym->name : "<choice>",
125 sym_type_name(sym->type), sym_type_name(type));
126}
127
128static struct property *menu_add_prop(enum prop_type type, struct expr *expr,
129 struct expr *dep)
130{
131 struct property *prop;
132
133 prop = xmalloc(sizeof(*prop));
134 memset(prop, 0, sizeof(*prop));
135 prop->type = type;
136 prop->file = current_file;
137 prop->lineno = zconf_lineno();
138 prop->menu = current_entry;
139 prop->expr = expr;
140 prop->visible.expr = dep;
141
142 /* append property to the prop list of symbol */
143 if (current_entry->sym) {
144 struct property **propp;
145
146 for (propp = ¤t_entry->sym->prop;
147 *propp;
148 propp = &(*propp)->next)
149 ;
150 *propp = prop;
151 }
152
153 return prop;
154}
155
156struct property *menu_add_prompt(enum prop_type type, char *prompt,
157 struct expr *dep)
158{
159 struct property *prop = menu_add_prop(type, NULL, dep);
160
161 if (isspace(*prompt)) {
162 prop_warn(prop, "leading whitespace ignored");
163 while (isspace(*prompt))
164 prompt++;
165 }
166 if (current_entry->prompt)
167 prop_warn(prop, "prompt redefined");
168
169 /* Apply all upper menus' visibilities to actual prompts. */
170 if (type == P_PROMPT) {
171 struct menu *menu = current_entry;
172
173 while ((menu = menu->parent) != NULL) {
174 struct expr *dup_expr;
175
176 if (!menu->visibility)
177 continue;
178 /*
179 * Do not add a reference to the menu's visibility
180 * expression but use a copy of it. Otherwise the
181 * expression reduction functions will modify
182 * expressions that have multiple references which
183 * can cause unwanted side effects.
184 */
185 dup_expr = expr_copy(menu->visibility);
186
187 prop->visible.expr = expr_alloc_and(prop->visible.expr,
188 dup_expr);
189 }
190 }
191
192 current_entry->prompt = prop;
193 prop->text = prompt;
194
195 return prop;
196}
197
198void menu_add_visibility(struct expr *expr)
199{
200 current_entry->visibility = expr_alloc_and(current_entry->visibility,
201 expr);
202}
203
204void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
205{
206 menu_add_prop(type, expr, dep);
207}
208
209void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
210{
211 menu_add_prop(type, expr_alloc_symbol(sym), dep);
212}
213
214void menu_add_option_modules(void)
215{
216 if (modules_sym)
217 zconf_error("symbol '%s' redefines option 'modules' already defined by symbol '%s'",
218 current_entry->sym->name, modules_sym->name);
219 modules_sym = current_entry->sym;
220}
221
222void menu_add_option_defconfig_list(void)
223{
224 if (!sym_defconfig_list)
225 sym_defconfig_list = current_entry->sym;
226 else if (sym_defconfig_list != current_entry->sym)
227 zconf_error("trying to redefine defconfig symbol");
228 sym_defconfig_list->flags |= SYMBOL_NO_WRITE;
229}
230
231void menu_add_option_allnoconfig_y(void)
232{
233 current_entry->sym->flags |= SYMBOL_ALLNOCONFIG_Y;
234}
235
236static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
237{
238 return sym2->type == S_INT || sym2->type == S_HEX ||
239 (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
240}
241
242static void sym_check_prop(struct symbol *sym)
243{
244 struct property *prop;
245 struct symbol *sym2;
246 char *use;
247
248 for (prop = sym->prop; prop; prop = prop->next) {
249 switch (prop->type) {
250 case P_DEFAULT:
251 if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
252 prop->expr->type != E_SYMBOL)
253 prop_warn(prop,
254 "default for config symbol '%s'"
255 " must be a single symbol", sym->name);
256 if (prop->expr->type != E_SYMBOL)
257 break;
258 sym2 = prop_get_symbol(prop);
259 if (sym->type == S_HEX || sym->type == S_INT) {
260 if (!menu_validate_number(sym, sym2))
261 prop_warn(prop,
262 "'%s': number is invalid",
263 sym->name);
264 }
265 if (sym_is_choice(sym)) {
266 struct property *choice_prop =
267 sym_get_choice_prop(sym2);
268
269 if (!choice_prop ||
270 prop_get_symbol(choice_prop) != sym)
271 prop_warn(prop,
272 "choice default symbol '%s' is not contained in the choice",
273 sym2->name);
274 }
275 break;
276 case P_SELECT:
277 case P_IMPLY:
278 use = prop->type == P_SELECT ? "select" : "imply";
279 sym2 = prop_get_symbol(prop);
280 if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
281 prop_warn(prop,
282 "config symbol '%s' uses %s, but is "
283 "not bool or tristate", sym->name, use);
284 else if (sym2->type != S_UNKNOWN &&
285 sym2->type != S_BOOLEAN &&
286 sym2->type != S_TRISTATE)
287 prop_warn(prop,
288 "'%s' has wrong type. '%s' only "
289 "accept arguments of bool and "
290 "tristate type", sym2->name, use);
291 break;
292 case P_RANGE:
293 if (sym->type != S_INT && sym->type != S_HEX)
294 prop_warn(prop, "range is only allowed "
295 "for int or hex symbols");
296 if (!menu_validate_number(sym, prop->expr->left.sym) ||
297 !menu_validate_number(sym, prop->expr->right.sym))
298 prop_warn(prop, "range is invalid");
299 break;
300 default:
301 ;
302 }
303 }
304}
305
306void menu_finalize(struct menu *parent)
307{
308 struct menu *menu, *last_menu;
309 struct symbol *sym;
310 struct property *prop;
311 struct expr *parentdep, *basedep, *dep, *dep2, **ep;
312
313 sym = parent->sym;
314 if (parent->list) {
315 /*
316 * This menu node has children. We (recursively) process them
317 * and propagate parent dependencies before moving on.
318 */
319
320 if (sym && sym_is_choice(sym)) {
321 if (sym->type == S_UNKNOWN) {
322 /* find the first choice value to find out choice type */
323 current_entry = parent;
324 for (menu = parent->list; menu; menu = menu->next) {
325 if (menu->sym && menu->sym->type != S_UNKNOWN) {
326 menu_set_type(menu->sym->type);
327 break;
328 }
329 }
330 }
331 /* set the type of the remaining choice values */
332 for (menu = parent->list; menu; menu = menu->next) {
333 current_entry = menu;
334 if (menu->sym && menu->sym->type == S_UNKNOWN)
335 menu_set_type(sym->type);
336 }
337
338 /*
339 * Use the choice itself as the parent dependency of
340 * the contained items. This turns the mode of the
341 * choice into an upper bound on the visibility of the
342 * choice value symbols.
343 */
344 parentdep = expr_alloc_symbol(sym);
345 } else {
346 /* Menu node for 'menu', 'if' */
347 parentdep = parent->dep;
348 }
349
350 /* For each child menu node... */
351 for (menu = parent->list; menu; menu = menu->next) {
352 /*
353 * Propagate parent dependencies to the child menu
354 * node, also rewriting and simplifying expressions
355 */
356 basedep = rewrite_m(menu->dep);
357 basedep = expr_transform(basedep);
358 basedep = expr_alloc_and(expr_copy(parentdep), basedep);
359 basedep = expr_eliminate_dups(basedep);
360 menu->dep = basedep;
361
362 if (menu->sym)
363 /*
364 * Note: For symbols, all prompts are included
365 * too in the symbol's own property list
366 */
367 prop = menu->sym->prop;
368 else
369 /*
370 * For non-symbol menu nodes, we just need to
371 * handle the prompt
372 */
373 prop = menu->prompt;
374
375 /* For each property... */
376 for (; prop; prop = prop->next) {
377 if (prop->menu != menu)
378 /*
379 * Two possibilities:
380 *
381 * 1. The property lacks dependencies
382 * and so isn't location-specific,
383 * e.g. an 'option'
384 *
385 * 2. The property belongs to a symbol
386 * defined in multiple locations and
387 * is from some other location. It
388 * will be handled there in that
389 * case.
390 *
391 * Skip the property.
392 */
393 continue;
394
395 /*
396 * Propagate parent dependencies to the
397 * property's condition, rewriting and
398 * simplifying expressions at the same time
399 */
400 dep = rewrite_m(prop->visible.expr);
401 dep = expr_transform(dep);
402 dep = expr_alloc_and(expr_copy(basedep), dep);
403 dep = expr_eliminate_dups(dep);
404 if (menu->sym && menu->sym->type != S_TRISTATE)
405 dep = expr_trans_bool(dep);
406 prop->visible.expr = dep;
407
408 /*
409 * Handle selects and implies, which modify the
410 * dependencies of the selected/implied symbol
411 */
412 if (prop->type == P_SELECT) {
413 struct symbol *es = prop_get_symbol(prop);
414 es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
415 expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
416 } else if (prop->type == P_IMPLY) {
417 struct symbol *es = prop_get_symbol(prop);
418 es->implied.expr = expr_alloc_or(es->implied.expr,
419 expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
420 }
421 }
422 }
423
424 if (sym && sym_is_choice(sym))
425 expr_free(parentdep);
426
427 /*
428 * Recursively process children in the same fashion before
429 * moving on
430 */
431 for (menu = parent->list; menu; menu = menu->next)
432 menu_finalize(menu);
433 } else if (sym) {
434 /*
435 * Automatic submenu creation. If sym is a symbol and A, B, C,
436 * ... are consecutive items (symbols, menus, ifs, etc.) that
437 * all depend on sym, then the following menu structure is
438 * created:
439 *
440 * sym
441 * +-A
442 * +-B
443 * +-C
444 * ...
445 *
446 * This also works recursively, giving the following structure
447 * if A is a symbol and B depends on A:
448 *
449 * sym
450 * +-A
451 * | +-B
452 * +-C
453 * ...
454 */
455
456 basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
457 basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
458 basedep = expr_eliminate_dups(expr_transform(basedep));
459
460 /* Examine consecutive elements after sym */
461 last_menu = NULL;
462 for (menu = parent->next; menu; menu = menu->next) {
463 dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
464 if (!expr_contains_symbol(dep, sym))
465 /* No dependency, quit */
466 break;
467 if (expr_depends_symbol(dep, sym))
468 /* Absolute dependency, put in submenu */
469 goto next;
470
471 /*
472 * Also consider it a dependency on sym if our
473 * dependencies contain sym and are a "superset" of
474 * sym's dependencies, e.g. '(sym || Q) && R' when sym
475 * depends on R.
476 *
477 * Note that 'R' might be from an enclosing menu or if,
478 * making this a more common case than it might seem.
479 */
480 dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
481 dep = expr_eliminate_dups(expr_transform(dep));
482 dep2 = expr_copy(basedep);
483 expr_eliminate_eq(&dep, &dep2);
484 expr_free(dep);
485 if (!expr_is_yes(dep2)) {
486 /* Not superset, quit */
487 expr_free(dep2);
488 break;
489 }
490 /* Superset, put in submenu */
491 expr_free(dep2);
492 next:
493 menu_finalize(menu);
494 menu->parent = parent;
495 last_menu = menu;
496 }
497 expr_free(basedep);
498 if (last_menu) {
499 parent->list = parent->next;
500 parent->next = last_menu->next;
501 last_menu->next = NULL;
502 }
503
504 sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
505 }
506 for (menu = parent->list; menu; menu = menu->next) {
507 if (sym && sym_is_choice(sym) &&
508 menu->sym && !sym_is_choice_value(menu->sym)) {
509 current_entry = menu;
510 menu->sym->flags |= SYMBOL_CHOICEVAL;
511 if (!menu->prompt)
512 menu_warn(menu, "choice value must have a prompt");
513 for (prop = menu->sym->prop; prop; prop = prop->next) {
514 if (prop->type == P_DEFAULT)
515 prop_warn(prop, "defaults for choice "
516 "values not supported");
517 if (prop->menu == menu)
518 continue;
519 if (prop->type == P_PROMPT &&
520 prop->menu->parent->sym != sym)
521 prop_warn(prop, "choice value used outside its choice group");
522 }
523 /* Non-tristate choice values of tristate choices must
524 * depend on the choice being set to Y. The choice
525 * values' dependencies were propagated to their
526 * properties above, so the change here must be re-
527 * propagated.
528 */
529 if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
530 basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
531 menu->dep = expr_alloc_and(basedep, menu->dep);
532 for (prop = menu->sym->prop; prop; prop = prop->next) {
533 if (prop->menu != menu)
534 continue;
535 prop->visible.expr = expr_alloc_and(expr_copy(basedep),
536 prop->visible.expr);
537 }
538 }
539 menu_add_symbol(P_CHOICE, sym, NULL);
540 prop = sym_get_choice_prop(sym);
541 for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
542 ;
543 *ep = expr_alloc_one(E_LIST, NULL);
544 (*ep)->right.sym = menu->sym;
545 }
546
547 /*
548 * This code serves two purposes:
549 *
550 * (1) Flattening 'if' blocks, which do not specify a submenu
551 * and only add dependencies.
552 *
553 * (Automatic submenu creation might still create a submenu
554 * from an 'if' before this code runs.)
555 *
556 * (2) "Undoing" any automatic submenus created earlier below
557 * promptless symbols.
558 *
559 * Before:
560 *
561 * A
562 * if ... (or promptless symbol)
563 * +-B
564 * +-C
565 * D
566 *
567 * After:
568 *
569 * A
570 * if ... (or promptless symbol)
571 * B
572 * C
573 * D
574 */
575 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
576 for (last_menu = menu->list; ; last_menu = last_menu->next) {
577 last_menu->parent = parent;
578 if (!last_menu->next)
579 break;
580 }
581 last_menu->next = menu->next;
582 menu->next = menu->list;
583 menu->list = NULL;
584 }
585 }
586
587 if (sym && !(sym->flags & SYMBOL_WARNED)) {
588 if (sym->type == S_UNKNOWN)
589 menu_warn(parent, "config symbol defined without type");
590
591 if (sym_is_choice(sym) && !parent->prompt)
592 menu_warn(parent, "choice must have a prompt");
593
594 /* Check properties connected to this symbol */
595 sym_check_prop(sym);
596 sym->flags |= SYMBOL_WARNED;
597 }
598
599 /*
600 * For non-optional choices, add a reverse dependency (corresponding to
601 * a select) of '<visibility> && m'. This prevents the user from
602 * setting the choice mode to 'n' when the choice is visible.
603 *
604 * This would also work for non-choice symbols, but only non-optional
605 * choices clear SYMBOL_OPTIONAL as of writing. Choices are implemented
606 * as a type of symbol.
607 */
608 if (sym && !sym_is_optional(sym) && parent->prompt) {
609 sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
610 expr_alloc_and(parent->prompt->visible.expr,
611 expr_alloc_symbol(&symbol_mod)));
612 }
613}
614
615bool menu_has_prompt(struct menu *menu)
616{
617 if (!menu->prompt)
618 return false;
619 return true;
620}
621
622/*
623 * Determine if a menu is empty.
624 * A menu is considered empty if it contains no or only
625 * invisible entries.
626 */
627bool menu_is_empty(struct menu *menu)
628{
629 struct menu *child;
630
631 for (child = menu->list; child; child = child->next) {
632 if (menu_is_visible(child))
633 return(false);
634 }
635 return(true);
636}
637
638bool menu_is_visible(struct menu *menu)
639{
640 struct menu *child;
641 struct symbol *sym;
642 tristate visible;
643
644 if (!menu->prompt)
645 return false;
646
647 if (menu->visibility) {
648 if (expr_calc_value(menu->visibility) == no)
649 return false;
650 }
651
652 sym = menu->sym;
653 if (sym) {
654 sym_calc_value(sym);
655 visible = menu->prompt->visible.tri;
656 } else
657 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
658
659 if (visible != no)
660 return true;
661
662 if (!sym || sym_get_tristate_value(menu->sym) == no)
663 return false;
664
665 for (child = menu->list; child; child = child->next) {
666 if (menu_is_visible(child)) {
667 if (sym)
668 sym->flags |= SYMBOL_DEF_USER;
669 return true;
670 }
671 }
672
673 return false;
674}
675
676const char *menu_get_prompt(struct menu *menu)
677{
678 if (menu->prompt)
679 return menu->prompt->text;
680 else if (menu->sym)
681 return menu->sym->name;
682 return NULL;
683}
684
685struct menu *menu_get_root_menu(struct menu *menu)
686{
687 return &rootmenu;
688}
689
690struct menu *menu_get_parent_menu(struct menu *menu)
691{
692 enum prop_type type;
693
694 for (; menu != &rootmenu; menu = menu->parent) {
695 type = menu->prompt ? menu->prompt->type : 0;
696 if (type == P_MENU)
697 break;
698 }
699 return menu;
700}
701
702bool menu_has_help(struct menu *menu)
703{
704 return menu->help != NULL;
705}
706
707const char *menu_get_help(struct menu *menu)
708{
709 if (menu->help)
710 return menu->help;
711 else
712 return "";
713}
714
715static void get_def_str(struct gstr *r, struct menu *menu)
716{
717 str_printf(r, "Defined at %s:%d\n",
718 menu->file->name, menu->lineno);
719}
720
721static void get_dep_str(struct gstr *r, struct expr *expr, const char *prefix)
722{
723 if (!expr_is_yes(expr)) {
724 str_append(r, prefix);
725 expr_gstr_print(expr, r);
726 str_append(r, "\n");
727 }
728}
729
730static void get_prompt_str(struct gstr *r, struct property *prop,
731 struct list_head *head)
732{
733 int i, j;
734 struct menu *submenu[8], *menu, *location = NULL;
735 struct jump_key *jump = NULL;
736
737 str_printf(r, " Prompt: %s\n", prop->text);
738
739 get_dep_str(r, prop->menu->dep, " Depends on: ");
740 /*
741 * Most prompts in Linux have visibility that exactly matches their
742 * dependencies. For these, we print only the dependencies to improve
743 * readability. However, prompts with inline "if" expressions and
744 * prompts with a parent that has a "visible if" expression have
745 * differing dependencies and visibility. In these rare cases, we
746 * print both.
747 */
748 if (!expr_eq(prop->menu->dep, prop->visible.expr))
749 get_dep_str(r, prop->visible.expr, " Visible if: ");
750
751 menu = prop->menu->parent;
752 for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
753 bool accessible = menu_is_visible(menu);
754
755 submenu[i++] = menu;
756 if (location == NULL && accessible)
757 location = menu;
758 }
759 if (head && location) {
760 jump = xmalloc(sizeof(struct jump_key));
761
762 if (menu_is_visible(prop->menu)) {
763 /*
764 * There is not enough room to put the hint at the
765 * beginning of the "Prompt" line. Put the hint on the
766 * last "Location" line even when it would belong on
767 * the former.
768 */
769 jump->target = prop->menu;
770 } else
771 jump->target = location;
772
773 if (list_empty(head))
774 jump->index = 0;
775 else
776 jump->index = list_entry(head->prev, struct jump_key,
777 entries)->index + 1;
778
779 list_add_tail(&jump->entries, head);
780 }
781
782 if (i > 0) {
783 str_printf(r, " Location:\n");
784 for (j = 4; --i >= 0; j += 2) {
785 menu = submenu[i];
786 if (jump && menu == location)
787 jump->offset = strlen(r->s);
788 str_printf(r, "%*c-> %s", j, ' ',
789 menu_get_prompt(menu));
790 if (menu->sym) {
791 str_printf(r, " (%s [=%s])", menu->sym->name ?
792 menu->sym->name : "<choice>",
793 sym_get_string_value(menu->sym));
794 }
795 str_append(r, "\n");
796 }
797 }
798}
799
800static void get_symbol_props_str(struct gstr *r, struct symbol *sym,
801 enum prop_type tok, const char *prefix)
802{
803 bool hit = false;
804 struct property *prop;
805
806 for_all_properties(sym, prop, tok) {
807 if (!hit) {
808 str_append(r, prefix);
809 hit = true;
810 } else
811 str_printf(r, " && ");
812 expr_gstr_print(prop->expr, r);
813 }
814 if (hit)
815 str_append(r, "\n");
816}
817
818/*
819 * head is optional and may be NULL
820 */
821static void get_symbol_str(struct gstr *r, struct symbol *sym,
822 struct list_head *head)
823{
824 struct property *prop;
825
826 if (sym && sym->name) {
827 str_printf(r, "Symbol: %s [=%s]\n", sym->name,
828 sym_get_string_value(sym));
829 str_printf(r, "Type : %s\n", sym_type_name(sym->type));
830 if (sym->type == S_INT || sym->type == S_HEX) {
831 prop = sym_get_range_prop(sym);
832 if (prop) {
833 str_printf(r, "Range : ");
834 expr_gstr_print(prop->expr, r);
835 str_append(r, "\n");
836 }
837 }
838 }
839
840 /* Print the definitions with prompts before the ones without */
841 for_all_properties(sym, prop, P_SYMBOL) {
842 if (prop->menu->prompt) {
843 get_def_str(r, prop->menu);
844 get_prompt_str(r, prop->menu->prompt, head);
845 }
846 }
847
848 for_all_properties(sym, prop, P_SYMBOL) {
849 if (!prop->menu->prompt) {
850 get_def_str(r, prop->menu);
851 get_dep_str(r, prop->menu->dep, " Depends on: ");
852 }
853 }
854
855 get_symbol_props_str(r, sym, P_SELECT, "Selects: ");
856 if (sym->rev_dep.expr) {
857 expr_gstr_print_revdep(sym->rev_dep.expr, r, yes, "Selected by [y]:\n");
858 expr_gstr_print_revdep(sym->rev_dep.expr, r, mod, "Selected by [m]:\n");
859 expr_gstr_print_revdep(sym->rev_dep.expr, r, no, "Selected by [n]:\n");
860 }
861
862 get_symbol_props_str(r, sym, P_IMPLY, "Implies: ");
863 if (sym->implied.expr) {
864 expr_gstr_print_revdep(sym->implied.expr, r, yes, "Implied by [y]:\n");
865 expr_gstr_print_revdep(sym->implied.expr, r, mod, "Implied by [m]:\n");
866 expr_gstr_print_revdep(sym->implied.expr, r, no, "Implied by [n]:\n");
867 }
868
869 str_append(r, "\n\n");
870}
871
872struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
873{
874 struct symbol *sym;
875 struct gstr res = str_new();
876 int i;
877
878 for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
879 get_symbol_str(&res, sym, head);
880 if (!i)
881 str_append(&res, "No matches found.\n");
882 return res;
883}
884
885
886void menu_get_ext_help(struct menu *menu, struct gstr *help)
887{
888 struct symbol *sym = menu->sym;
889 const char *help_text = nohelp_text;
890
891 if (menu_has_help(menu)) {
892 if (sym->name)
893 str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
894 help_text = menu_get_help(menu);
895 }
896 str_printf(help, "%s\n", help_text);
897 if (sym)
898 get_symbol_str(help, sym, NULL);
899}
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 <stdarg.h>
8#include <stdlib.h>
9#include <string.h>
10
11#include "lkc.h"
12
13static const char nohelp_text[] = "There is no help available for this option.";
14
15struct menu rootmenu;
16static struct menu **last_entry_ptr;
17
18struct file *file_list;
19struct file *current_file;
20
21void menu_warn(struct menu *menu, const char *fmt, ...)
22{
23 va_list ap;
24 va_start(ap, fmt);
25 fprintf(stderr, "%s:%d:warning: ", menu->file->name, menu->lineno);
26 vfprintf(stderr, fmt, ap);
27 fprintf(stderr, "\n");
28 va_end(ap);
29}
30
31static void prop_warn(struct property *prop, const char *fmt, ...)
32{
33 va_list ap;
34 va_start(ap, fmt);
35 fprintf(stderr, "%s:%d:warning: ", prop->file->name, prop->lineno);
36 vfprintf(stderr, fmt, ap);
37 fprintf(stderr, "\n");
38 va_end(ap);
39}
40
41void _menu_init(void)
42{
43 current_entry = current_menu = &rootmenu;
44 last_entry_ptr = &rootmenu.list;
45}
46
47void menu_add_entry(struct symbol *sym)
48{
49 struct menu *menu;
50
51 menu = malloc(sizeof(*menu));
52 memset(menu, 0, sizeof(*menu));
53 menu->sym = sym;
54 menu->parent = current_menu;
55 menu->file = current_file;
56 menu->lineno = zconf_lineno();
57
58 *last_entry_ptr = menu;
59 last_entry_ptr = &menu->next;
60 current_entry = menu;
61 if (sym)
62 menu_add_symbol(P_SYMBOL, sym, NULL);
63}
64
65void menu_end_entry(void)
66{
67}
68
69struct menu *menu_add_menu(void)
70{
71 menu_end_entry();
72 last_entry_ptr = ¤t_entry->list;
73 return current_menu = current_entry;
74}
75
76void menu_end_menu(void)
77{
78 last_entry_ptr = ¤t_menu->next;
79 current_menu = current_menu->parent;
80}
81
82static struct expr *menu_check_dep(struct expr *e)
83{
84 if (!e)
85 return e;
86
87 switch (e->type) {
88 case E_NOT:
89 e->left.expr = menu_check_dep(e->left.expr);
90 break;
91 case E_OR:
92 case E_AND:
93 e->left.expr = menu_check_dep(e->left.expr);
94 e->right.expr = menu_check_dep(e->right.expr);
95 break;
96 case E_SYMBOL:
97 /* change 'm' into 'm' && MODULES */
98 if (e->left.sym == &symbol_mod)
99 return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
100 break;
101 default:
102 break;
103 }
104 return e;
105}
106
107void menu_add_dep(struct expr *dep)
108{
109 current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
110}
111
112void menu_set_type(int type)
113{
114 struct symbol *sym = current_entry->sym;
115
116 if (sym->type == type)
117 return;
118 if (sym->type == S_UNKNOWN) {
119 sym->type = type;
120 return;
121 }
122 menu_warn(current_entry, "type of '%s' redefined from '%s' to '%s'",
123 sym->name ? sym->name : "<choice>",
124 sym_type_name(sym->type), sym_type_name(type));
125}
126
127struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
128{
129 struct property *prop = prop_alloc(type, current_entry->sym);
130
131 prop->menu = current_entry;
132 prop->expr = expr;
133 prop->visible.expr = menu_check_dep(dep);
134
135 if (prompt) {
136 if (isspace(*prompt)) {
137 prop_warn(prop, "leading whitespace ignored");
138 while (isspace(*prompt))
139 prompt++;
140 }
141 if (current_entry->prompt && current_entry != &rootmenu)
142 prop_warn(prop, "prompt redefined");
143
144 /* Apply all upper menus' visibilities to actual prompts. */
145 if(type == P_PROMPT) {
146 struct menu *menu = current_entry;
147
148 while ((menu = menu->parent) != NULL) {
149 if (!menu->visibility)
150 continue;
151 prop->visible.expr
152 = expr_alloc_and(prop->visible.expr,
153 menu->visibility);
154 }
155 }
156
157 current_entry->prompt = prop;
158 }
159 prop->text = prompt;
160
161 return prop;
162}
163
164struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
165{
166 return menu_add_prop(type, prompt, NULL, dep);
167}
168
169void menu_add_visibility(struct expr *expr)
170{
171 current_entry->visibility = expr_alloc_and(current_entry->visibility,
172 expr);
173}
174
175void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
176{
177 menu_add_prop(type, NULL, expr, dep);
178}
179
180void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
181{
182 menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
183}
184
185void menu_add_option(int token, char *arg)
186{
187 struct property *prop;
188
189 switch (token) {
190 case T_OPT_MODULES:
191 prop = prop_alloc(P_DEFAULT, modules_sym);
192 prop->expr = expr_alloc_symbol(current_entry->sym);
193 break;
194 case T_OPT_DEFCONFIG_LIST:
195 if (!sym_defconfig_list)
196 sym_defconfig_list = current_entry->sym;
197 else if (sym_defconfig_list != current_entry->sym)
198 zconf_error("trying to redefine defconfig symbol");
199 break;
200 case T_OPT_ENV:
201 prop_add_env(arg);
202 break;
203 }
204}
205
206static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
207{
208 return sym2->type == S_INT || sym2->type == S_HEX ||
209 (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
210}
211
212static void sym_check_prop(struct symbol *sym)
213{
214 struct property *prop;
215 struct symbol *sym2;
216 for (prop = sym->prop; prop; prop = prop->next) {
217 switch (prop->type) {
218 case P_DEFAULT:
219 if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
220 prop->expr->type != E_SYMBOL)
221 prop_warn(prop,
222 "default for config symbol '%s'"
223 " must be a single symbol", sym->name);
224 if (prop->expr->type != E_SYMBOL)
225 break;
226 sym2 = prop_get_symbol(prop);
227 if (sym->type == S_HEX || sym->type == S_INT) {
228 if (!menu_validate_number(sym, sym2))
229 prop_warn(prop,
230 "'%s': number is invalid",
231 sym->name);
232 }
233 break;
234 case P_SELECT:
235 sym2 = prop_get_symbol(prop);
236 if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
237 prop_warn(prop,
238 "config symbol '%s' uses select, but is "
239 "not boolean or tristate", sym->name);
240 else if (sym2->type != S_UNKNOWN &&
241 sym2->type != S_BOOLEAN &&
242 sym2->type != S_TRISTATE)
243 prop_warn(prop,
244 "'%s' has wrong type. 'select' only "
245 "accept arguments of boolean and "
246 "tristate type", sym2->name);
247 break;
248 case P_RANGE:
249 if (sym->type != S_INT && sym->type != S_HEX)
250 prop_warn(prop, "range is only allowed "
251 "for int or hex symbols");
252 if (!menu_validate_number(sym, prop->expr->left.sym) ||
253 !menu_validate_number(sym, prop->expr->right.sym))
254 prop_warn(prop, "range is invalid");
255 break;
256 default:
257 ;
258 }
259 }
260}
261
262void menu_finalize(struct menu *parent)
263{
264 struct menu *menu, *last_menu;
265 struct symbol *sym;
266 struct property *prop;
267 struct expr *parentdep, *basedep, *dep, *dep2, **ep;
268
269 sym = parent->sym;
270 if (parent->list) {
271 if (sym && sym_is_choice(sym)) {
272 if (sym->type == S_UNKNOWN) {
273 /* find the first choice value to find out choice type */
274 current_entry = parent;
275 for (menu = parent->list; menu; menu = menu->next) {
276 if (menu->sym && menu->sym->type != S_UNKNOWN) {
277 menu_set_type(menu->sym->type);
278 break;
279 }
280 }
281 }
282 /* set the type of the remaining choice values */
283 for (menu = parent->list; menu; menu = menu->next) {
284 current_entry = menu;
285 if (menu->sym && menu->sym->type == S_UNKNOWN)
286 menu_set_type(sym->type);
287 }
288 parentdep = expr_alloc_symbol(sym);
289 } else if (parent->prompt)
290 parentdep = parent->prompt->visible.expr;
291 else
292 parentdep = parent->dep;
293
294 for (menu = parent->list; menu; menu = menu->next) {
295 basedep = expr_transform(menu->dep);
296 basedep = expr_alloc_and(expr_copy(parentdep), basedep);
297 basedep = expr_eliminate_dups(basedep);
298 menu->dep = basedep;
299 if (menu->sym)
300 prop = menu->sym->prop;
301 else
302 prop = menu->prompt;
303 for (; prop; prop = prop->next) {
304 if (prop->menu != menu)
305 continue;
306 dep = expr_transform(prop->visible.expr);
307 dep = expr_alloc_and(expr_copy(basedep), dep);
308 dep = expr_eliminate_dups(dep);
309 if (menu->sym && menu->sym->type != S_TRISTATE)
310 dep = expr_trans_bool(dep);
311 prop->visible.expr = dep;
312 if (prop->type == P_SELECT) {
313 struct symbol *es = prop_get_symbol(prop);
314 es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
315 expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
316 }
317 }
318 }
319 for (menu = parent->list; menu; menu = menu->next)
320 menu_finalize(menu);
321 } else if (sym) {
322 basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
323 basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
324 basedep = expr_eliminate_dups(expr_transform(basedep));
325 last_menu = NULL;
326 for (menu = parent->next; menu; menu = menu->next) {
327 dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
328 if (!expr_contains_symbol(dep, sym))
329 break;
330 if (expr_depends_symbol(dep, sym))
331 goto next;
332 dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
333 dep = expr_eliminate_dups(expr_transform(dep));
334 dep2 = expr_copy(basedep);
335 expr_eliminate_eq(&dep, &dep2);
336 expr_free(dep);
337 if (!expr_is_yes(dep2)) {
338 expr_free(dep2);
339 break;
340 }
341 expr_free(dep2);
342 next:
343 menu_finalize(menu);
344 menu->parent = parent;
345 last_menu = menu;
346 }
347 if (last_menu) {
348 parent->list = parent->next;
349 parent->next = last_menu->next;
350 last_menu->next = NULL;
351 }
352
353 sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
354 }
355 for (menu = parent->list; menu; menu = menu->next) {
356 if (sym && sym_is_choice(sym) &&
357 menu->sym && !sym_is_choice_value(menu->sym)) {
358 current_entry = menu;
359 menu->sym->flags |= SYMBOL_CHOICEVAL;
360 if (!menu->prompt)
361 menu_warn(menu, "choice value must have a prompt");
362 for (prop = menu->sym->prop; prop; prop = prop->next) {
363 if (prop->type == P_DEFAULT)
364 prop_warn(prop, "defaults for choice "
365 "values not supported");
366 if (prop->menu == menu)
367 continue;
368 if (prop->type == P_PROMPT &&
369 prop->menu->parent->sym != sym)
370 prop_warn(prop, "choice value used outside its choice group");
371 }
372 /* Non-tristate choice values of tristate choices must
373 * depend on the choice being set to Y. The choice
374 * values' dependencies were propagated to their
375 * properties above, so the change here must be re-
376 * propagated.
377 */
378 if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
379 basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
380 menu->dep = expr_alloc_and(basedep, menu->dep);
381 for (prop = menu->sym->prop; prop; prop = prop->next) {
382 if (prop->menu != menu)
383 continue;
384 prop->visible.expr = expr_alloc_and(expr_copy(basedep),
385 prop->visible.expr);
386 }
387 }
388 menu_add_symbol(P_CHOICE, sym, NULL);
389 prop = sym_get_choice_prop(sym);
390 for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
391 ;
392 *ep = expr_alloc_one(E_LIST, NULL);
393 (*ep)->right.sym = menu->sym;
394 }
395 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
396 for (last_menu = menu->list; ; last_menu = last_menu->next) {
397 last_menu->parent = parent;
398 if (!last_menu->next)
399 break;
400 }
401 last_menu->next = menu->next;
402 menu->next = menu->list;
403 menu->list = NULL;
404 }
405 }
406
407 if (sym && !(sym->flags & SYMBOL_WARNED)) {
408 if (sym->type == S_UNKNOWN)
409 menu_warn(parent, "config symbol defined without type");
410
411 if (sym_is_choice(sym) && !parent->prompt)
412 menu_warn(parent, "choice must have a prompt");
413
414 /* Check properties connected to this symbol */
415 sym_check_prop(sym);
416 sym->flags |= SYMBOL_WARNED;
417 }
418
419 if (sym && !sym_is_optional(sym) && parent->prompt) {
420 sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
421 expr_alloc_and(parent->prompt->visible.expr,
422 expr_alloc_symbol(&symbol_mod)));
423 }
424}
425
426bool menu_has_prompt(struct menu *menu)
427{
428 if (!menu->prompt)
429 return false;
430 return true;
431}
432
433bool menu_is_visible(struct menu *menu)
434{
435 struct menu *child;
436 struct symbol *sym;
437 tristate visible;
438
439 if (!menu->prompt)
440 return false;
441
442 if (menu->visibility) {
443 if (expr_calc_value(menu->visibility) == no)
444 return no;
445 }
446
447 sym = menu->sym;
448 if (sym) {
449 sym_calc_value(sym);
450 visible = menu->prompt->visible.tri;
451 } else
452 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
453
454 if (visible != no)
455 return true;
456
457 if (!sym || sym_get_tristate_value(menu->sym) == no)
458 return false;
459
460 for (child = menu->list; child; child = child->next) {
461 if (menu_is_visible(child)) {
462 if (sym)
463 sym->flags |= SYMBOL_DEF_USER;
464 return true;
465 }
466 }
467
468 return false;
469}
470
471const char *menu_get_prompt(struct menu *menu)
472{
473 if (menu->prompt)
474 return menu->prompt->text;
475 else if (menu->sym)
476 return menu->sym->name;
477 return NULL;
478}
479
480struct menu *menu_get_root_menu(struct menu *menu)
481{
482 return &rootmenu;
483}
484
485struct menu *menu_get_parent_menu(struct menu *menu)
486{
487 enum prop_type type;
488
489 for (; menu != &rootmenu; menu = menu->parent) {
490 type = menu->prompt ? menu->prompt->type : 0;
491 if (type == P_MENU)
492 break;
493 }
494 return menu;
495}
496
497bool menu_has_help(struct menu *menu)
498{
499 return menu->help != NULL;
500}
501
502const char *menu_get_help(struct menu *menu)
503{
504 if (menu->help)
505 return menu->help;
506 else
507 return "";
508}
509
510static void get_prompt_str(struct gstr *r, struct property *prop)
511{
512 int i, j;
513 struct menu *submenu[8], *menu;
514
515 str_printf(r, _("Prompt: %s\n"), _(prop->text));
516 str_printf(r, _(" Defined at %s:%d\n"), prop->menu->file->name,
517 prop->menu->lineno);
518 if (!expr_is_yes(prop->visible.expr)) {
519 str_append(r, _(" Depends on: "));
520 expr_gstr_print(prop->visible.expr, r);
521 str_append(r, "\n");
522 }
523 menu = prop->menu->parent;
524 for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent)
525 submenu[i++] = menu;
526 if (i > 0) {
527 str_printf(r, _(" Location:\n"));
528 for (j = 4; --i >= 0; j += 2) {
529 menu = submenu[i];
530 str_printf(r, "%*c-> %s", j, ' ', _(menu_get_prompt(menu)));
531 if (menu->sym) {
532 str_printf(r, " (%s [=%s])", menu->sym->name ?
533 menu->sym->name : _("<choice>"),
534 sym_get_string_value(menu->sym));
535 }
536 str_append(r, "\n");
537 }
538 }
539}
540
541void get_symbol_str(struct gstr *r, struct symbol *sym)
542{
543 bool hit;
544 struct property *prop;
545
546 if (sym && sym->name) {
547 str_printf(r, "Symbol: %s [=%s]\n", sym->name,
548 sym_get_string_value(sym));
549 str_printf(r, "Type : %s\n", sym_type_name(sym->type));
550 if (sym->type == S_INT || sym->type == S_HEX) {
551 prop = sym_get_range_prop(sym);
552 if (prop) {
553 str_printf(r, "Range : ");
554 expr_gstr_print(prop->expr, r);
555 str_append(r, "\n");
556 }
557 }
558 }
559 for_all_prompts(sym, prop)
560 get_prompt_str(r, prop);
561 hit = false;
562 for_all_properties(sym, prop, P_SELECT) {
563 if (!hit) {
564 str_append(r, " Selects: ");
565 hit = true;
566 } else
567 str_printf(r, " && ");
568 expr_gstr_print(prop->expr, r);
569 }
570 if (hit)
571 str_append(r, "\n");
572 if (sym->rev_dep.expr) {
573 str_append(r, _(" Selected by: "));
574 expr_gstr_print(sym->rev_dep.expr, r);
575 str_append(r, "\n");
576 }
577 str_append(r, "\n\n");
578}
579
580struct gstr get_relations_str(struct symbol **sym_arr)
581{
582 struct symbol *sym;
583 struct gstr res = str_new();
584 int i;
585
586 for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
587 get_symbol_str(&res, sym);
588 if (!i)
589 str_append(&res, _("No matches found.\n"));
590 return res;
591}
592
593
594void menu_get_ext_help(struct menu *menu, struct gstr *help)
595{
596 struct symbol *sym = menu->sym;
597 const char *help_text = nohelp_text;
598
599 if (menu_has_help(menu)) {
600 if (sym->name)
601 str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
602 help_text = menu_get_help(menu);
603 }
604 str_printf(help, "%s\n", _(help_text));
605 if (sym)
606 get_symbol_str(help, sym);
607}