1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
14 static const char nohelp_text[] = "There is no help available for this option.";
17 static struct menu **last_entry_ptr;
19 struct file *file_list;
20 struct file *current_file;
22 void menu_warn(struct menu *menu, const char *fmt, ...)
26 fprintf(stderr, "%s:%d:warning: ", menu->file->name, menu->lineno);
27 vfprintf(stderr, fmt, ap);
28 fprintf(stderr, "\n");
32 static void prop_warn(struct property *prop, const char *fmt, ...)
36 fprintf(stderr, "%s:%d:warning: ", prop->file->name, prop->lineno);
37 vfprintf(stderr, fmt, ap);
38 fprintf(stderr, "\n");
44 current_entry = current_menu = &rootmenu;
45 last_entry_ptr = &rootmenu.list;
48 void menu_add_entry(struct symbol *sym)
52 menu = xmalloc(sizeof(*menu));
53 memset(menu, 0, sizeof(*menu));
55 menu->parent = current_menu;
56 menu->file = current_file;
57 menu->lineno = zconf_lineno();
59 *last_entry_ptr = menu;
60 last_entry_ptr = &menu->next;
63 menu_add_symbol(P_SYMBOL, sym, NULL);
66 struct menu *menu_add_menu(void)
68 last_entry_ptr = ¤t_entry->list;
69 current_menu = current_entry;
73 void menu_end_menu(void)
75 last_entry_ptr = ¤t_menu->next;
76 current_menu = current_menu->parent;
80 * Rewrites 'm' to 'm' && MODULES, so that it evaluates to 'n' when running
83 static struct expr *rewrite_m(struct expr *e)
90 e->left.expr = rewrite_m(e->left.expr);
94 e->left.expr = rewrite_m(e->left.expr);
95 e->right.expr = rewrite_m(e->right.expr);
98 /* change 'm' into 'm' && MODULES */
99 if (e->left.sym == &symbol_mod)
100 return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
108 void menu_add_dep(struct expr *dep)
110 current_entry->dep = expr_alloc_and(current_entry->dep, dep);
113 void menu_set_type(int type)
115 struct symbol *sym = current_entry->sym;
117 if (sym->type == type)
119 if (sym->type == S_UNKNOWN) {
123 menu_warn(current_entry,
124 "ignoring type redefinition of '%s' from '%s' to '%s'",
125 sym->name ? sym->name : "<choice>",
126 sym_type_name(sym->type), sym_type_name(type));
129 static struct property *menu_add_prop(enum prop_type type, struct expr *expr,
132 struct property *prop;
134 prop = xmalloc(sizeof(*prop));
135 memset(prop, 0, sizeof(*prop));
137 prop->file = current_file;
138 prop->lineno = zconf_lineno();
139 prop->menu = current_entry;
141 prop->visible.expr = dep;
143 /* append property to the prop list of symbol */
144 if (current_entry->sym) {
145 struct property **propp;
147 for (propp = ¤t_entry->sym->prop;
149 propp = &(*propp)->next)
157 struct property *menu_add_prompt(enum prop_type type, char *prompt,
160 struct property *prop = menu_add_prop(type, NULL, dep);
162 if (isspace(*prompt)) {
163 prop_warn(prop, "leading whitespace ignored");
164 while (isspace(*prompt))
167 if (current_entry->prompt)
168 prop_warn(prop, "prompt redefined");
170 /* Apply all upper menus' visibilities to actual prompts. */
171 if (type == P_PROMPT) {
172 struct menu *menu = current_entry;
174 while ((menu = menu->parent) != NULL) {
175 struct expr *dup_expr;
177 if (!menu->visibility)
180 * Do not add a reference to the menu's visibility
181 * expression but use a copy of it. Otherwise the
182 * expression reduction functions will modify
183 * expressions that have multiple references which
184 * can cause unwanted side effects.
186 dup_expr = expr_copy(menu->visibility);
188 prop->visible.expr = expr_alloc_and(prop->visible.expr,
193 current_entry->prompt = prop;
199 void menu_add_visibility(struct expr *expr)
201 current_entry->visibility = expr_alloc_and(current_entry->visibility,
205 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
207 menu_add_prop(type, expr, dep);
210 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
212 menu_add_prop(type, expr_alloc_symbol(sym), dep);
215 static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
217 return sym2->type == S_INT || sym2->type == S_HEX ||
218 (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
221 static void sym_check_prop(struct symbol *sym)
223 struct property *prop;
227 for (prop = sym->prop; prop; prop = prop->next) {
228 switch (prop->type) {
230 if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
231 prop->expr->type != E_SYMBOL)
233 "default for config symbol '%s'"
234 " must be a single symbol", sym->name);
235 if (prop->expr->type != E_SYMBOL)
237 sym2 = prop_get_symbol(prop);
238 if (sym->type == S_HEX || sym->type == S_INT) {
239 if (!menu_validate_number(sym, sym2))
241 "'%s': number is invalid",
244 if (sym_is_choice(sym)) {
245 struct property *choice_prop =
246 sym_get_choice_prop(sym2);
249 prop_get_symbol(choice_prop) != sym)
251 "choice default symbol '%s' is not contained in the choice",
257 use = prop->type == P_SELECT ? "select" : "imply";
258 sym2 = prop_get_symbol(prop);
259 if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
261 "config symbol '%s' uses %s, but is "
262 "not bool or tristate", sym->name, use);
263 else if (sym2->type != S_UNKNOWN &&
264 sym2->type != S_BOOLEAN &&
265 sym2->type != S_TRISTATE)
267 "'%s' has wrong type. '%s' only "
268 "accept arguments of bool and "
269 "tristate type", sym2->name, use);
272 if (sym->type != S_INT && sym->type != S_HEX)
273 prop_warn(prop, "range is only allowed "
274 "for int or hex symbols");
275 if (!menu_validate_number(sym, prop->expr->left.sym) ||
276 !menu_validate_number(sym, prop->expr->right.sym))
277 prop_warn(prop, "range is invalid");
285 void menu_finalize(struct menu *parent)
287 struct menu *menu, *last_menu;
289 struct property *prop;
290 struct expr *parentdep, *basedep, *dep, *dep2, **ep;
295 * This menu node has children. We (recursively) process them
296 * and propagate parent dependencies before moving on.
299 if (sym && sym_is_choice(sym)) {
300 if (sym->type == S_UNKNOWN) {
301 /* find the first choice value to find out choice type */
302 current_entry = parent;
303 for (menu = parent->list; menu; menu = menu->next) {
304 if (menu->sym && menu->sym->type != S_UNKNOWN) {
305 menu_set_type(menu->sym->type);
310 /* set the type of the remaining choice values */
311 for (menu = parent->list; menu; menu = menu->next) {
312 current_entry = menu;
313 if (menu->sym && menu->sym->type == S_UNKNOWN)
314 menu_set_type(sym->type);
318 * Use the choice itself as the parent dependency of
319 * the contained items. This turns the mode of the
320 * choice into an upper bound on the visibility of the
321 * choice value symbols.
323 parentdep = expr_alloc_symbol(sym);
325 /* Menu node for 'menu', 'if' */
326 parentdep = parent->dep;
329 /* For each child menu node... */
330 for (menu = parent->list; menu; menu = menu->next) {
332 * Propagate parent dependencies to the child menu
333 * node, also rewriting and simplifying expressions
335 basedep = rewrite_m(menu->dep);
336 basedep = expr_transform(basedep);
337 basedep = expr_alloc_and(expr_copy(parentdep), basedep);
338 basedep = expr_eliminate_dups(basedep);
343 * Note: For symbols, all prompts are included
344 * too in the symbol's own property list
346 prop = menu->sym->prop;
349 * For non-symbol menu nodes, we just need to
354 /* For each property... */
355 for (; prop; prop = prop->next) {
356 if (prop->menu != menu)
360 * 1. The property lacks dependencies
361 * and so isn't location-specific,
364 * 2. The property belongs to a symbol
365 * defined in multiple locations and
366 * is from some other location. It
367 * will be handled there in that
375 * Propagate parent dependencies to the
376 * property's condition, rewriting and
377 * simplifying expressions at the same time
379 dep = rewrite_m(prop->visible.expr);
380 dep = expr_transform(dep);
381 dep = expr_alloc_and(expr_copy(basedep), dep);
382 dep = expr_eliminate_dups(dep);
383 if (menu->sym && menu->sym->type != S_TRISTATE)
384 dep = expr_trans_bool(dep);
385 prop->visible.expr = dep;
388 * Handle selects and implies, which modify the
389 * dependencies of the selected/implied symbol
391 if (prop->type == P_SELECT) {
392 struct symbol *es = prop_get_symbol(prop);
393 es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
394 expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
395 } else if (prop->type == P_IMPLY) {
396 struct symbol *es = prop_get_symbol(prop);
397 es->implied.expr = expr_alloc_or(es->implied.expr,
398 expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
403 if (sym && sym_is_choice(sym))
404 expr_free(parentdep);
407 * Recursively process children in the same fashion before
410 for (menu = parent->list; menu; menu = menu->next)
414 * Automatic submenu creation. If sym is a symbol and A, B, C,
415 * ... are consecutive items (symbols, menus, ifs, etc.) that
416 * all depend on sym, then the following menu structure is
425 * This also works recursively, giving the following structure
426 * if A is a symbol and B depends on A:
435 basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
436 basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
437 basedep = expr_eliminate_dups(expr_transform(basedep));
439 /* Examine consecutive elements after sym */
441 for (menu = parent->next; menu; menu = menu->next) {
442 dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
443 if (!expr_contains_symbol(dep, sym))
444 /* No dependency, quit */
446 if (expr_depends_symbol(dep, sym))
447 /* Absolute dependency, put in submenu */
451 * Also consider it a dependency on sym if our
452 * dependencies contain sym and are a "superset" of
453 * sym's dependencies, e.g. '(sym || Q) && R' when sym
456 * Note that 'R' might be from an enclosing menu or if,
457 * making this a more common case than it might seem.
459 dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
460 dep = expr_eliminate_dups(expr_transform(dep));
461 dep2 = expr_copy(basedep);
462 expr_eliminate_eq(&dep, &dep2);
464 if (!expr_is_yes(dep2)) {
465 /* Not superset, quit */
469 /* Superset, put in submenu */
473 menu->parent = parent;
478 parent->list = parent->next;
479 parent->next = last_menu->next;
480 last_menu->next = NULL;
483 sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
485 for (menu = parent->list; menu; menu = menu->next) {
486 if (sym && sym_is_choice(sym) &&
487 menu->sym && !sym_is_choice_value(menu->sym)) {
488 current_entry = menu;
489 menu->sym->flags |= SYMBOL_CHOICEVAL;
491 menu_warn(menu, "choice value must have a prompt");
492 for (prop = menu->sym->prop; prop; prop = prop->next) {
493 if (prop->type == P_DEFAULT)
494 prop_warn(prop, "defaults for choice "
495 "values not supported");
496 if (prop->menu == menu)
498 if (prop->type == P_PROMPT &&
499 prop->menu->parent->sym != sym)
500 prop_warn(prop, "choice value used outside its choice group");
502 /* Non-tristate choice values of tristate choices must
503 * depend on the choice being set to Y. The choice
504 * values' dependencies were propagated to their
505 * properties above, so the change here must be re-
508 if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
509 basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
510 menu->dep = expr_alloc_and(basedep, menu->dep);
511 for (prop = menu->sym->prop; prop; prop = prop->next) {
512 if (prop->menu != menu)
514 prop->visible.expr = expr_alloc_and(expr_copy(basedep),
518 menu_add_symbol(P_CHOICE, sym, NULL);
519 prop = sym_get_choice_prop(sym);
520 for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
522 *ep = expr_alloc_one(E_LIST, NULL);
523 (*ep)->right.sym = menu->sym;
527 * This code serves two purposes:
529 * (1) Flattening 'if' blocks, which do not specify a submenu
530 * and only add dependencies.
532 * (Automatic submenu creation might still create a submenu
533 * from an 'if' before this code runs.)
535 * (2) "Undoing" any automatic submenus created earlier below
536 * promptless symbols.
541 * if ... (or promptless symbol)
549 * if ... (or promptless symbol)
554 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
555 for (last_menu = menu->list; ; last_menu = last_menu->next) {
556 last_menu->parent = parent;
557 if (!last_menu->next)
560 last_menu->next = menu->next;
561 menu->next = menu->list;
566 if (sym && !(sym->flags & SYMBOL_WARNED)) {
567 if (sym->type == S_UNKNOWN)
568 menu_warn(parent, "config symbol defined without type");
570 if (sym_is_choice(sym) && !parent->prompt)
571 menu_warn(parent, "choice must have a prompt");
573 /* Check properties connected to this symbol */
575 sym->flags |= SYMBOL_WARNED;
579 * For non-optional choices, add a reverse dependency (corresponding to
580 * a select) of '<visibility> && m'. This prevents the user from
581 * setting the choice mode to 'n' when the choice is visible.
583 * This would also work for non-choice symbols, but only non-optional
584 * choices clear SYMBOL_OPTIONAL as of writing. Choices are implemented
585 * as a type of symbol.
587 if (sym && !sym_is_optional(sym) && parent->prompt) {
588 sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
589 expr_alloc_and(parent->prompt->visible.expr,
590 expr_alloc_symbol(&symbol_mod)));
594 bool menu_has_prompt(struct menu *menu)
602 * Determine if a menu is empty.
603 * A menu is considered empty if it contains no or only
606 bool menu_is_empty(struct menu *menu)
610 for (child = menu->list; child; child = child->next) {
611 if (menu_is_visible(child))
617 bool menu_is_visible(struct menu *menu)
626 if (menu->visibility) {
627 if (expr_calc_value(menu->visibility) == no)
634 visible = menu->prompt->visible.tri;
636 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
641 if (!sym || sym_get_tristate_value(menu->sym) == no)
644 for (child = menu->list; child; child = child->next) {
645 if (menu_is_visible(child)) {
647 sym->flags |= SYMBOL_DEF_USER;
655 const char *menu_get_prompt(struct menu *menu)
658 return menu->prompt->text;
660 return menu->sym->name;
664 struct menu *menu_get_parent_menu(struct menu *menu)
668 for (; menu != &rootmenu; menu = menu->parent) {
669 type = menu->prompt ? menu->prompt->type : 0;
676 bool menu_has_help(struct menu *menu)
678 return menu->help != NULL;
681 const char *menu_get_help(struct menu *menu)
689 static void get_def_str(struct gstr *r, struct menu *menu)
691 str_printf(r, "Defined at %s:%d\n",
692 menu->file->name, menu->lineno);
695 static void get_dep_str(struct gstr *r, struct expr *expr, const char *prefix)
697 if (!expr_is_yes(expr)) {
698 str_append(r, prefix);
699 expr_gstr_print(expr, r);
704 int __attribute__((weak)) get_jump_key_char(void)
709 static void get_prompt_str(struct gstr *r, struct property *prop,
710 struct list_head *head)
713 struct menu *submenu[8], *menu, *location = NULL;
714 struct jump_key *jump = NULL;
716 str_printf(r, " Prompt: %s\n", prop->text);
718 get_dep_str(r, prop->menu->dep, " Depends on: ");
720 * Most prompts in Linux have visibility that exactly matches their
721 * dependencies. For these, we print only the dependencies to improve
722 * readability. However, prompts with inline "if" expressions and
723 * prompts with a parent that has a "visible if" expression have
724 * differing dependencies and visibility. In these rare cases, we
727 if (!expr_eq(prop->menu->dep, prop->visible.expr))
728 get_dep_str(r, prop->visible.expr, " Visible if: ");
731 for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
733 if (location == NULL && menu_is_visible(menu))
736 if (head && location) {
737 jump = xmalloc(sizeof(struct jump_key));
738 jump->target = location;
739 list_add_tail(&jump->entries, head);
742 str_printf(r, " Location:\n");
743 for (j = 0; --i >= 0; j++) {
745 int indent = 2 * j + 4;
748 if (jump && menu == location) {
749 jump->offset = strlen(r->s);
750 jk = get_jump_key_char();
754 str_printf(r, "(%c)", jk);
758 str_printf(r, "%*c-> %s", indent, ' ', menu_get_prompt(menu));
760 str_printf(r, " (%s [=%s])", menu->sym->name ?
761 menu->sym->name : "<choice>",
762 sym_get_string_value(menu->sym));
768 static void get_symbol_props_str(struct gstr *r, struct symbol *sym,
769 enum prop_type tok, const char *prefix)
772 struct property *prop;
774 for_all_properties(sym, prop, tok) {
776 str_append(r, prefix);
779 str_printf(r, " && ");
780 expr_gstr_print(prop->expr, r);
787 * head is optional and may be NULL
789 static void get_symbol_str(struct gstr *r, struct symbol *sym,
790 struct list_head *head)
792 struct property *prop;
794 if (sym && sym->name) {
795 str_printf(r, "Symbol: %s [=%s]\n", sym->name,
796 sym_get_string_value(sym));
797 str_printf(r, "Type : %s\n", sym_type_name(sym->type));
798 if (sym->type == S_INT || sym->type == S_HEX) {
799 prop = sym_get_range_prop(sym);
801 str_printf(r, "Range : ");
802 expr_gstr_print(prop->expr, r);
808 /* Print the definitions with prompts before the ones without */
809 for_all_properties(sym, prop, P_SYMBOL) {
810 if (prop->menu->prompt) {
811 get_def_str(r, prop->menu);
812 get_prompt_str(r, prop->menu->prompt, head);
816 for_all_properties(sym, prop, P_SYMBOL) {
817 if (!prop->menu->prompt) {
818 get_def_str(r, prop->menu);
819 get_dep_str(r, prop->menu->dep, " Depends on: ");
823 get_symbol_props_str(r, sym, P_SELECT, "Selects: ");
824 if (sym->rev_dep.expr) {
825 expr_gstr_print_revdep(sym->rev_dep.expr, r, yes, "Selected by [y]:\n");
826 expr_gstr_print_revdep(sym->rev_dep.expr, r, mod, "Selected by [m]:\n");
827 expr_gstr_print_revdep(sym->rev_dep.expr, r, no, "Selected by [n]:\n");
830 get_symbol_props_str(r, sym, P_IMPLY, "Implies: ");
831 if (sym->implied.expr) {
832 expr_gstr_print_revdep(sym->implied.expr, r, yes, "Implied by [y]:\n");
833 expr_gstr_print_revdep(sym->implied.expr, r, mod, "Implied by [m]:\n");
834 expr_gstr_print_revdep(sym->implied.expr, r, no, "Implied by [n]:\n");
837 str_append(r, "\n\n");
840 struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
843 struct gstr res = str_new();
846 for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
847 get_symbol_str(&res, sym, head);
849 str_append(&res, "No matches found.\n");
854 void menu_get_ext_help(struct menu *menu, struct gstr *help)
856 struct symbol *sym = menu->sym;
857 const char *help_text = nohelp_text;
859 if (menu_has_help(menu)) {
861 str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
862 help_text = menu_get_help(menu);
864 str_printf(help, "%s\n", help_text);
866 get_symbol_str(help, sym, NULL);