staticconstchar nohelp_text[] = "There is no help available for this option.";
struct menu rootmenu = { .type = M_MENU }; staticstruct menu **last_entry_ptr;
/** * menu_next - return the next menu entry with depth-first traversal * @menu: pointer to the current menu * @root: root of the sub-tree to traverse. If NULL is given, the traveral * continues until it reaches the end of the entire menu tree. * return: the menu to visit next, or NULL when it reaches the end.
*/ struct menu *menu_next(struct menu *menu, struct menu *root)
{ if (menu->list) return menu->list;
while (menu != root && !menu->next)
menu = menu->parent;
/* * Rewrites 'm' to 'm' && MODULES, so that it evaluates to 'n' when running * without modules
*/ staticstruct expr *rewrite_m(struct expr *e)
{ if (!e) return e;
switch (e->type) { case E_NOT:
e = expr_alloc_one(E_NOT, rewrite_m(e->left.expr)); break; case E_OR: case E_AND:
e = expr_alloc_two(e->type,
rewrite_m(e->left.expr),
rewrite_m(e->right.expr)); break; case E_SYMBOL: /* change 'm' into 'm' && MODULES */ if (e->left.sym == &symbol_mod) return expr_alloc_and(e, expr_alloc_symbol(modules_sym)); break; default: break;
} return e;
}
staticvoid sym_check_prop(struct symbol *sym)
{ struct property *prop; struct symbol *sym2; char *use;
for (prop = sym->prop; prop; prop = prop->next) { switch (prop->type) { case P_DEFAULT: if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
prop->expr->type != E_SYMBOL)
prop_warn(prop, "default for config symbol '%s'" " must be a single symbol", sym->name); if (prop->expr->type != E_SYMBOL) break;
sym2 = prop_get_symbol(prop); if (sym->type == S_HEX || sym->type == S_INT) { if (!menu_validate_number(sym, sym2))
prop_warn(prop, "'%s': number is invalid",
sym->name);
} if (sym_is_choice(sym)) { struct menu *choice = sym_get_choice_menu(sym2);
if (!choice || choice->sym != sym)
prop_warn(prop, "choice default symbol '%s' is not contained in the choice",
sym2->name);
} break; case P_SELECT: case P_IMPLY:
use = prop->type == P_SELECT ? "select" : "imply";
sym2 = prop_get_symbol(prop); if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
prop_warn(prop, "config symbol '%s' uses %s, but is " "not bool or tristate", sym->name, use); elseif (sym2->type != S_UNKNOWN &&
sym2->type != S_BOOLEAN &&
sym2->type != S_TRISTATE)
prop_warn(prop, "'%s' has wrong type. '%s' only " "accept arguments of bool and " "tristate type", sym2->name, use); break; case P_RANGE: if (sym->type != S_INT && sym->type != S_HEX)
prop_warn(prop, "range is only allowed " "for int or hex symbols"); if (!menu_validate_number(sym, prop->expr->left.sym) ||
!menu_validate_number(sym, prop->expr->right.sym))
prop_warn(prop, "range is invalid"); break; default:
;
}
}
}
staticvoid _menu_finalize(struct menu *parent, bool inside_choice)
{ struct menu *menu, *last_menu; struct symbol *sym; struct property *prop; struct expr *basedep, *dep, *dep2;
sym = parent->sym; if (parent->list) { /* * This menu node has children. We (recursively) process them * and propagate parent dependencies before moving on.
*/
/* For each child menu node... */ for (menu = parent->list; menu; menu = menu->next) { /* * Propagate parent dependencies to the child menu * node, also rewriting and simplifying expressions
*/
basedep = rewrite_m(menu->dep);
basedep = expr_transform(basedep);
basedep = expr_alloc_and(parent->dep, basedep);
basedep = expr_eliminate_dups(basedep);
menu->dep = basedep;
if (menu->sym) /* * Note: For symbols, all prompts are included * too in the symbol's own property list
*/
prop = menu->sym->prop; else /* * For non-symbol menu nodes, we just need to * handle the prompt
*/
prop = menu->prompt;
/* For each property... */ for (; prop; prop = prop->next) { if (prop->menu != menu) /* * Two possibilities: * * 1. The property lacks dependencies * and so isn't location-specific, * e.g. an 'option' * * 2. The property belongs to a symbol * defined in multiple locations and * is from some other location. It * will be handled there in that * case. * * Skip the property.
*/ continue;
/* * Propagate parent dependencies to the * property's condition, rewriting and * simplifying expressions at the same time
*/
dep = rewrite_m(prop->visible.expr);
dep = expr_transform(dep);
dep = expr_alloc_and(basedep, dep);
dep = expr_eliminate_dups(dep);
prop->visible.expr = dep;
/* * Handle selects and implies, which modify the * dependencies of the selected/implied symbol
*/ if (prop->type == P_SELECT) { struct symbol *es = prop_get_symbol(prop);
es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
expr_alloc_and(expr_alloc_symbol(menu->sym), dep));
} elseif (prop->type == P_IMPLY) { struct symbol *es = prop_get_symbol(prop);
es->implied.expr = expr_alloc_or(es->implied.expr,
expr_alloc_and(expr_alloc_symbol(menu->sym), dep));
}
}
}
/* * Recursively process children in the same fashion before * moving on
*/ for (menu = parent->list; menu; menu = menu->next)
_menu_finalize(menu, sym && sym_is_choice(sym));
} elseif (!inside_choice && sym) { /* * Automatic submenu creation. If sym is a symbol and A, B, C, * ... are consecutive items (symbols, menus, ifs, etc.) that * all depend on sym, then the following menu structure is * created: * * sym * +-A * +-B * +-C * ... * * This also works recursively, giving the following structure * if A is a symbol and B depends on A: * * sym * +-A * | +-B * +-C * ...
*/
/* Examine consecutive elements after sym */
last_menu = NULL; for (menu = parent->next; menu; menu = menu->next) {
dep = menu->prompt ? menu->prompt->visible.expr : menu->dep; if (!expr_contains_symbol(dep, sym)) /* No dependency, quit */ break; if (expr_depends_symbol(dep, sym)) /* Absolute dependency, put in submenu */ goto next;
/* * Also consider it a dependency on sym if our * dependencies contain sym and are a "superset" of * sym's dependencies, e.g. '(sym || Q) && R' when sym * depends on R. * * Note that 'R' might be from an enclosing menu or if, * making this a more common case than it might seem.
*/
dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
dep = expr_eliminate_dups(expr_transform(dep));
dep2 = basedep;
expr_eliminate_eq(&dep, &dep2); if (!expr_is_yes(dep2)) { /* Not superset, quit */ break;
} /* Superset, put in submenu */
next:
_menu_finalize(menu, false);
menu->parent = parent;
last_menu = menu;
} if (last_menu) {
parent->list = parent->next;
parent->next = last_menu->next;
last_menu->next = NULL;
}
sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
} for (menu = parent->list; menu; menu = menu->next) { /* * This code serves two purposes: * * (1) Flattening 'if' blocks, which do not specify a submenu * and only add dependencies. * * (Automatic submenu creation might still create a submenu * from an 'if' before this code runs.) * * (2) "Undoing" any automatic submenus created earlier below * promptless symbols. * * Before: * * A * if ... (or promptless symbol) * +-B * +-C * D * * After: * * A * if ... (or promptless symbol) * B * C * D
*/ if (menu->list && (!menu->prompt || !menu->prompt->text)) { for (last_menu = menu->list; ; last_menu = last_menu->next) {
last_menu->parent = parent; if (!last_menu->next) break;
}
last_menu->next = menu->next;
menu->next = menu->list;
menu->list = NULL;
}
}
if (sym && !(sym->flags & SYMBOL_WARNED)) { if (sym->type == S_UNKNOWN)
menu_warn(parent, "config symbol defined without type");
/* Check properties connected to this symbol */
sym_check_prop(sym);
sym->flags |= SYMBOL_WARNED;
}
}
bool menu_has_prompt(conststruct menu *menu)
{ if (!menu->prompt) returnfalse; returntrue;
}
/* * Determine if a menu is empty. * A menu is considered empty if it contains no or only * invisible entries.
*/ bool menu_is_empty(struct menu *menu)
{ struct menu *child;
for (child = menu->list; child; child = child->next) { if (menu_is_visible(child)) return(false);
} return(true);
}
bool menu_is_visible(struct menu *menu)
{ struct menu *child; struct symbol *sym;
tristate visible;
if (!menu->prompt) returnfalse;
if (menu->visibility) { if (expr_calc_value(menu->visibility) == no) returnfalse;
}
if (!sym || sym_get_tristate_value(menu->sym) == no) returnfalse;
for (child = menu->list; child; child = child->next) if (menu_is_visible(child)) returntrue;
returnfalse;
}
constchar *menu_get_prompt(conststruct menu *menu)
{ if (menu->prompt) return menu->prompt->text; elseif (menu->sym) return menu->sym->name; return NULL;
}
/** * menu_get_parent_menu - return the parent menu or NULL * @menu: pointer to the menu * return: the parent menu, or NULL if there is no parent.
*/ struct menu *menu_get_parent_menu(struct menu *menu)
{ for (menu = menu->parent; menu; menu = menu->parent) if (menu->type == M_MENU) return menu;
return NULL;
}
/** * menu_get_menu_or_parent_menu - return the parent menu or the menu itself * @menu: pointer to the menu * return: the parent menu. If the given argument is already a menu, return * itself.
*/ struct menu *menu_get_menu_or_parent_menu(struct menu *menu)
{ enum prop_type type;
for (; menu != &rootmenu; menu = menu->parent) {
type = menu->prompt ? menu->prompt->type : 0; if (type == P_MENU) break;
} return menu;
}
staticvoid get_def_str(struct gstr *r, conststruct menu *menu)
{
str_printf(r, "Defined at %s:%d\n",
menu->filename, menu->lineno);
}
int __attribute__((weak)) get_jump_key_char(void)
{ return -1;
}
staticvoid get_prompt_str(struct gstr *r, struct property *prop, struct list_head *head)
{ int i, j; struct menu *submenu[8], *menu, *location = NULL; struct jump_key *jump = NULL;
str_printf(r, " Prompt: %s\n", prop->text);
get_dep_str(r, prop->menu->dep, " Depends on: "); /* * Most prompts in Linux have visibility that exactly matches their * dependencies. For these, we print only the dependencies to improve * readability. However, prompts with inline "if" expressions and * prompts with a parent that has a "visible if" expression have * differing dependencies and visibility. In these rare cases, we * print both.
*/ if (!expr_eq(prop->menu->dep, prop->visible.expr))
get_dep_str(r, prop->visible.expr, " Visible if: ");
menu = prop->menu; for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
submenu[i++] = menu; if (location == NULL && menu_is_visible(menu))
location = menu;
} if (head && location) {
jump = xmalloc(sizeof(struct jump_key));
jump->target = location;
list_add_tail(&jump->entries, head);
}
str_printf(r, " Location:\n"); for (j = 0; --i >= 0; j++) { int jk = -1; int indent = 2 * j + 4;
menu = submenu[i]; if (jump && menu == location) {
jump->offset = strlen(r->s);
jk = get_jump_key_char();
}
staticvoid get_symbol_props_str(struct gstr *r, struct symbol *sym, enum prop_type tok, constchar *prefix)
{ bool hit = false; struct property *prop;
for_all_properties(sym, prop, tok) { if (!hit) {
str_append(r, prefix);
hit = true;
} else
str_printf(r, " && ");
expr_gstr_print(prop->expr, r);
} if (hit)
str_append(r, "\n");
}
/* * head is optional and may be NULL
*/ staticvoid get_symbol_str(struct gstr *r, struct symbol *sym, struct list_head *head)
{ struct property *prop; struct menu *menu;
/* Print the definitions with prompts before the ones without */
list_for_each_entry(menu, &sym->menus, link) { if (menu->prompt) {
get_def_str(r, menu);
get_prompt_str(r, menu->prompt, head);
}
}
list_for_each_entry(menu, &sym->menus, link) { if (!menu->prompt) {
get_def_str(r, menu);
get_dep_str(r, menu->dep, " Depends on: ");
}
}
get_symbol_props_str(r, sym, P_SELECT, "Selects: "); if (sym->rev_dep.expr) {
expr_gstr_print_revdep(sym->rev_dep.expr, r, yes, "Selected by [y]:\n");
expr_gstr_print_revdep(sym->rev_dep.expr, r, mod, "Selected by [m]:\n");
expr_gstr_print_revdep(sym->rev_dep.expr, r, no, "Selected by [n]:\n");
}
get_symbol_props_str(r, sym, P_IMPLY, "Implies: "); if (sym->implied.expr) {
expr_gstr_print_revdep(sym->implied.expr, r, yes, "Implied by [y]:\n");
expr_gstr_print_revdep(sym->implied.expr, r, mod, "Implied by [m]:\n");
expr_gstr_print_revdep(sym->implied.expr, r, no, "Implied by [n]:\n");
}
str_append(r, "\n\n");
}
struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
{ struct symbol *sym; struct gstr res = str_new(); int i;
for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
get_symbol_str(&res, sym, head); if (!i)
str_append(&res, "No matches found.\n"); return res;
}
void menu_get_ext_help(struct menu *menu, struct gstr *help)
{ struct symbol *sym = menu->sym; constchar *help_text = nohelp_text;
if (menu->help) { if (sym->name)
str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
help_text = menu->help;
}
str_printf(help, "%s\n", help_text); if (sym)
get_symbol_str(help, sym, NULL);
}
/** * menu_dump - dump all menu entries in a tree-like format
*/ void menu_dump(void)
{ struct menu *menu = &rootmenu; unsignedlonglong bits = 0; int indent = 0;
while (menu) {
for (int i = indent - 1; i >= 0; i--) { if (bits & (1ULL << i)) { if (i > 0)
printf("| "); else
printf("|-- ");
} else { if (i > 0)
printf(" "); else
printf("`-- ");
}
}
switch (menu->type) { case M_CHOICE:
printf("choice \"%s\"\n", menu->prompt->text); break; case M_COMMENT:
printf("comment \"%s\"\n", menu->prompt->text); break; case M_IF:
printf("if\n"); break; case M_MENU:
printf("menu \"%s\"", menu->prompt->text); if (!menu->sym) {
printf("\n"); break;
}
printf(" + "); /* fallthrough */ case M_NORMAL:
printf("symbol %s\n", menu->sym->name); break;
} if (menu->list) {
bits <<= 1;
menu = menu->list; if (menu->next)
bits |= 1; else
bits &= ~1;
indent++; continue;
}
while (menu && !menu->next) {
menu = menu->parent;
bits >>= 1;
indent--;
}
if (menu) {
menu = menu->next; if (menu->next)
bits |= 1; else
bits &= ~1;
}
}
}
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