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![Nicolas Pitre](/assets/img/avatar_default.png)
The "imply" keyword is a weak version of "select" where the target config symbol can still be turned off, avoiding those pitfalls that come with the "select" keyword. This is useful e.g. with multiple drivers that want to indicate their ability to hook into a secondary subsystem while allowing the user to configure that subsystem out without also having to unset these drivers. Currently, the same effect can almost be achieved with: config DRIVER_A tristate config DRIVER_B tristate config DRIVER_C tristate config DRIVER_D tristate [...] config SUBSYSTEM_X tristate default DRIVER_A || DRIVER_B || DRIVER_C || DRIVER_D || [...] This is unwieldy to maintain especially with a large number of drivers. Furthermore, there is no easy way to restrict the choice for SUBSYSTEM_X to y or n, excluding m, when some drivers are built-in. The "select" keyword allows for excluding m, but it excludes n as well. Hence this "imply" keyword. The above becomes: config DRIVER_A tristate imply SUBSYSTEM_X config DRIVER_B tristate imply SUBSYSTEM_X [...] config SUBSYSTEM_X tristate This is much cleaner, and way more flexible than "select". SUBSYSTEM_X can still be configured out, and it can be set as a module when none of the drivers are configured in or all of them are modular. Signed-off-by: Nicolas Pitre <nico@linaro.org> Acked-by: Richard Cochran <richardcochran@gmail.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: John Stultz <john.stultz@linaro.org> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Cc: Paul Bolle <pebolle@tiscali.nl> Cc: linux-kbuild@vger.kernel.org Cc: netdev@vger.kernel.org Cc: Michal Marek <mmarek@suse.com> Cc: Edward Cree <ecree@solarflare.com> Link: http://lkml.kernel.org/r/1478841010-28605-2-git-send-email-nicolas.pitre@linaro.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
720 lines
18 KiB
C
720 lines
18 KiB
C
/*
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* Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
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* Released under the terms of the GNU GPL v2.0.
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*/
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#include <ctype.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include "lkc.h"
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static const char nohelp_text[] = "There is no help available for this option.";
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struct menu rootmenu;
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static struct menu **last_entry_ptr;
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struct file *file_list;
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struct file *current_file;
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void menu_warn(struct menu *menu, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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fprintf(stderr, "%s:%d:warning: ", menu->file->name, menu->lineno);
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, "\n");
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va_end(ap);
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}
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static void prop_warn(struct property *prop, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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fprintf(stderr, "%s:%d:warning: ", prop->file->name, prop->lineno);
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, "\n");
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va_end(ap);
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}
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void _menu_init(void)
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{
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current_entry = current_menu = &rootmenu;
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last_entry_ptr = &rootmenu.list;
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}
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void menu_add_entry(struct symbol *sym)
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{
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struct menu *menu;
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menu = xmalloc(sizeof(*menu));
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memset(menu, 0, sizeof(*menu));
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menu->sym = sym;
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menu->parent = current_menu;
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menu->file = current_file;
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menu->lineno = zconf_lineno();
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*last_entry_ptr = menu;
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last_entry_ptr = &menu->next;
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current_entry = menu;
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if (sym)
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menu_add_symbol(P_SYMBOL, sym, NULL);
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}
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void menu_end_entry(void)
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{
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}
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struct menu *menu_add_menu(void)
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{
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menu_end_entry();
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last_entry_ptr = ¤t_entry->list;
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return current_menu = current_entry;
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}
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void menu_end_menu(void)
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{
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last_entry_ptr = ¤t_menu->next;
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current_menu = current_menu->parent;
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}
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static struct expr *menu_check_dep(struct expr *e)
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{
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if (!e)
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return e;
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switch (e->type) {
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case E_NOT:
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e->left.expr = menu_check_dep(e->left.expr);
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break;
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case E_OR:
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case E_AND:
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e->left.expr = menu_check_dep(e->left.expr);
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e->right.expr = menu_check_dep(e->right.expr);
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break;
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case E_SYMBOL:
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/* change 'm' into 'm' && MODULES */
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if (e->left.sym == &symbol_mod)
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return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
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break;
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default:
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break;
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}
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return e;
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}
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void menu_add_dep(struct expr *dep)
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{
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current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
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}
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void menu_set_type(int type)
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{
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struct symbol *sym = current_entry->sym;
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if (sym->type == type)
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return;
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if (sym->type == S_UNKNOWN) {
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sym->type = type;
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return;
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}
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menu_warn(current_entry,
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"ignoring type redefinition of '%s' from '%s' to '%s'",
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sym->name ? sym->name : "<choice>",
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sym_type_name(sym->type), sym_type_name(type));
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}
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static struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
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{
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struct property *prop = prop_alloc(type, current_entry->sym);
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prop->menu = current_entry;
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prop->expr = expr;
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prop->visible.expr = menu_check_dep(dep);
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if (prompt) {
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if (isspace(*prompt)) {
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prop_warn(prop, "leading whitespace ignored");
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while (isspace(*prompt))
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prompt++;
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}
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if (current_entry->prompt && current_entry != &rootmenu)
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prop_warn(prop, "prompt redefined");
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/* Apply all upper menus' visibilities to actual prompts. */
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if(type == P_PROMPT) {
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struct menu *menu = current_entry;
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while ((menu = menu->parent) != NULL) {
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struct expr *dup_expr;
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if (!menu->visibility)
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continue;
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/*
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* Do not add a reference to the
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* menu's visibility expression but
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* use a copy of it. Otherwise the
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* expression reduction functions
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* will modify expressions that have
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* multiple references which can
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* cause unwanted side effects.
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*/
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dup_expr = expr_copy(menu->visibility);
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prop->visible.expr
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= expr_alloc_and(prop->visible.expr,
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dup_expr);
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}
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}
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current_entry->prompt = prop;
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}
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prop->text = prompt;
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return prop;
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}
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struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
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{
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return menu_add_prop(type, prompt, NULL, dep);
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}
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void menu_add_visibility(struct expr *expr)
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{
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current_entry->visibility = expr_alloc_and(current_entry->visibility,
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expr);
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}
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void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
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{
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menu_add_prop(type, NULL, expr, dep);
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}
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void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
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{
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menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
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}
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void menu_add_option(int token, char *arg)
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{
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switch (token) {
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case T_OPT_MODULES:
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if (modules_sym)
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zconf_error("symbol '%s' redefines option 'modules'"
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" already defined by symbol '%s'",
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current_entry->sym->name,
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modules_sym->name
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);
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modules_sym = current_entry->sym;
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break;
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case T_OPT_DEFCONFIG_LIST:
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if (!sym_defconfig_list)
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sym_defconfig_list = current_entry->sym;
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else if (sym_defconfig_list != current_entry->sym)
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zconf_error("trying to redefine defconfig symbol");
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break;
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case T_OPT_ENV:
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prop_add_env(arg);
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break;
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case T_OPT_ALLNOCONFIG_Y:
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current_entry->sym->flags |= SYMBOL_ALLNOCONFIG_Y;
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break;
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}
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}
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static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
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{
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return sym2->type == S_INT || sym2->type == S_HEX ||
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(sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
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}
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static void sym_check_prop(struct symbol *sym)
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{
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struct property *prop;
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struct symbol *sym2;
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char *use;
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for (prop = sym->prop; prop; prop = prop->next) {
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switch (prop->type) {
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case P_DEFAULT:
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if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
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prop->expr->type != E_SYMBOL)
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prop_warn(prop,
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"default for config symbol '%s'"
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" must be a single symbol", sym->name);
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if (prop->expr->type != E_SYMBOL)
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break;
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sym2 = prop_get_symbol(prop);
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if (sym->type == S_HEX || sym->type == S_INT) {
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if (!menu_validate_number(sym, sym2))
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prop_warn(prop,
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"'%s': number is invalid",
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sym->name);
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}
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break;
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case P_SELECT:
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case P_IMPLY:
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use = prop->type == P_SELECT ? "select" : "imply";
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sym2 = prop_get_symbol(prop);
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if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
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prop_warn(prop,
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"config symbol '%s' uses %s, but is "
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"not boolean or tristate", sym->name, use);
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else if (sym2->type != S_UNKNOWN &&
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sym2->type != S_BOOLEAN &&
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sym2->type != S_TRISTATE)
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prop_warn(prop,
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"'%s' has wrong type. '%s' only "
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"accept arguments of boolean and "
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"tristate type", sym2->name, use);
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break;
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case P_RANGE:
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if (sym->type != S_INT && sym->type != S_HEX)
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prop_warn(prop, "range is only allowed "
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"for int or hex symbols");
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if (!menu_validate_number(sym, prop->expr->left.sym) ||
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!menu_validate_number(sym, prop->expr->right.sym))
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prop_warn(prop, "range is invalid");
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break;
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default:
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;
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}
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}
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}
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void menu_finalize(struct menu *parent)
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{
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struct menu *menu, *last_menu;
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struct symbol *sym;
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struct property *prop;
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struct expr *parentdep, *basedep, *dep, *dep2, **ep;
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sym = parent->sym;
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if (parent->list) {
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if (sym && sym_is_choice(sym)) {
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if (sym->type == S_UNKNOWN) {
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/* find the first choice value to find out choice type */
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current_entry = parent;
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for (menu = parent->list; menu; menu = menu->next) {
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if (menu->sym && menu->sym->type != S_UNKNOWN) {
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menu_set_type(menu->sym->type);
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break;
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}
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}
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}
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/* set the type of the remaining choice values */
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for (menu = parent->list; menu; menu = menu->next) {
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current_entry = menu;
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if (menu->sym && menu->sym->type == S_UNKNOWN)
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menu_set_type(sym->type);
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}
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parentdep = expr_alloc_symbol(sym);
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} else if (parent->prompt)
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parentdep = parent->prompt->visible.expr;
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else
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parentdep = parent->dep;
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for (menu = parent->list; menu; menu = menu->next) {
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basedep = expr_transform(menu->dep);
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basedep = expr_alloc_and(expr_copy(parentdep), basedep);
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basedep = expr_eliminate_dups(basedep);
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menu->dep = basedep;
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if (menu->sym)
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prop = menu->sym->prop;
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else
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prop = menu->prompt;
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for (; prop; prop = prop->next) {
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if (prop->menu != menu)
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continue;
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dep = expr_transform(prop->visible.expr);
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dep = expr_alloc_and(expr_copy(basedep), dep);
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dep = expr_eliminate_dups(dep);
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if (menu->sym && menu->sym->type != S_TRISTATE)
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dep = expr_trans_bool(dep);
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prop->visible.expr = dep;
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if (prop->type == P_SELECT) {
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struct symbol *es = prop_get_symbol(prop);
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es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
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expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
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} else if (prop->type == P_IMPLY) {
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struct symbol *es = prop_get_symbol(prop);
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es->implied.expr = expr_alloc_or(es->implied.expr,
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expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
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}
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}
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}
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for (menu = parent->list; menu; menu = menu->next)
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menu_finalize(menu);
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} else if (sym) {
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basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
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basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
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basedep = expr_eliminate_dups(expr_transform(basedep));
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last_menu = NULL;
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for (menu = parent->next; menu; menu = menu->next) {
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dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
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if (!expr_contains_symbol(dep, sym))
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break;
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if (expr_depends_symbol(dep, sym))
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goto next;
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dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
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dep = expr_eliminate_dups(expr_transform(dep));
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dep2 = expr_copy(basedep);
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expr_eliminate_eq(&dep, &dep2);
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expr_free(dep);
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if (!expr_is_yes(dep2)) {
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expr_free(dep2);
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break;
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}
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expr_free(dep2);
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next:
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menu_finalize(menu);
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menu->parent = parent;
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last_menu = menu;
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}
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if (last_menu) {
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parent->list = parent->next;
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parent->next = last_menu->next;
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last_menu->next = NULL;
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}
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sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
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}
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for (menu = parent->list; menu; menu = menu->next) {
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if (sym && sym_is_choice(sym) &&
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menu->sym && !sym_is_choice_value(menu->sym)) {
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current_entry = menu;
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menu->sym->flags |= SYMBOL_CHOICEVAL;
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if (!menu->prompt)
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menu_warn(menu, "choice value must have a prompt");
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for (prop = menu->sym->prop; prop; prop = prop->next) {
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if (prop->type == P_DEFAULT)
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prop_warn(prop, "defaults for choice "
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"values not supported");
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if (prop->menu == menu)
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continue;
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if (prop->type == P_PROMPT &&
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prop->menu->parent->sym != sym)
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prop_warn(prop, "choice value used outside its choice group");
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}
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/* Non-tristate choice values of tristate choices must
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* depend on the choice being set to Y. The choice
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* values' dependencies were propagated to their
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* properties above, so the change here must be re-
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* propagated.
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*/
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if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
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basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
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menu->dep = expr_alloc_and(basedep, menu->dep);
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for (prop = menu->sym->prop; prop; prop = prop->next) {
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if (prop->menu != menu)
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continue;
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prop->visible.expr = expr_alloc_and(expr_copy(basedep),
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prop->visible.expr);
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}
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}
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menu_add_symbol(P_CHOICE, sym, NULL);
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prop = sym_get_choice_prop(sym);
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for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
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;
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*ep = expr_alloc_one(E_LIST, NULL);
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(*ep)->right.sym = menu->sym;
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}
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if (menu->list && (!menu->prompt || !menu->prompt->text)) {
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for (last_menu = menu->list; ; last_menu = last_menu->next) {
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last_menu->parent = parent;
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if (!last_menu->next)
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break;
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}
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last_menu->next = menu->next;
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menu->next = menu->list;
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menu->list = NULL;
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}
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}
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if (sym && !(sym->flags & SYMBOL_WARNED)) {
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if (sym->type == S_UNKNOWN)
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menu_warn(parent, "config symbol defined without type");
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if (sym_is_choice(sym) && !parent->prompt)
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menu_warn(parent, "choice must have a prompt");
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/* Check properties connected to this symbol */
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sym_check_prop(sym);
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sym->flags |= SYMBOL_WARNED;
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}
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if (sym && !sym_is_optional(sym) && parent->prompt) {
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sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
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expr_alloc_and(parent->prompt->visible.expr,
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expr_alloc_symbol(&symbol_mod)));
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}
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}
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bool menu_has_prompt(struct menu *menu)
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{
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if (!menu->prompt)
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return false;
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return true;
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}
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/*
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* Determine if a menu is empty.
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* A menu is considered empty if it contains no or only
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* invisible entries.
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*/
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bool menu_is_empty(struct menu *menu)
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{
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struct menu *child;
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for (child = menu->list; child; child = child->next) {
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if (menu_is_visible(child))
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return(false);
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}
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return(true);
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}
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bool menu_is_visible(struct menu *menu)
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{
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struct menu *child;
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struct symbol *sym;
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tristate visible;
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|
|
if (!menu->prompt)
|
|
return false;
|
|
|
|
if (menu->visibility) {
|
|
if (expr_calc_value(menu->visibility) == no)
|
|
return false;
|
|
}
|
|
|
|
sym = menu->sym;
|
|
if (sym) {
|
|
sym_calc_value(sym);
|
|
visible = menu->prompt->visible.tri;
|
|
} else
|
|
visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
|
|
|
|
if (visible != no)
|
|
return true;
|
|
|
|
if (!sym || sym_get_tristate_value(menu->sym) == no)
|
|
return false;
|
|
|
|
for (child = menu->list; child; child = child->next) {
|
|
if (menu_is_visible(child)) {
|
|
if (sym)
|
|
sym->flags |= SYMBOL_DEF_USER;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
const char *menu_get_prompt(struct menu *menu)
|
|
{
|
|
if (menu->prompt)
|
|
return menu->prompt->text;
|
|
else if (menu->sym)
|
|
return menu->sym->name;
|
|
return NULL;
|
|
}
|
|
|
|
struct menu *menu_get_root_menu(struct menu *menu)
|
|
{
|
|
return &rootmenu;
|
|
}
|
|
|
|
struct menu *menu_get_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;
|
|
}
|
|
|
|
bool menu_has_help(struct menu *menu)
|
|
{
|
|
return menu->help != NULL;
|
|
}
|
|
|
|
const char *menu_get_help(struct menu *menu)
|
|
{
|
|
if (menu->help)
|
|
return menu->help;
|
|
else
|
|
return "";
|
|
}
|
|
|
|
static void 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));
|
|
menu = prop->menu->parent;
|
|
for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
|
|
bool accessible = menu_is_visible(menu);
|
|
|
|
submenu[i++] = menu;
|
|
if (location == NULL && accessible)
|
|
location = menu;
|
|
}
|
|
if (head && location) {
|
|
jump = xmalloc(sizeof(struct jump_key));
|
|
|
|
if (menu_is_visible(prop->menu)) {
|
|
/*
|
|
* There is not enough room to put the hint at the
|
|
* beginning of the "Prompt" line. Put the hint on the
|
|
* last "Location" line even when it would belong on
|
|
* the former.
|
|
*/
|
|
jump->target = prop->menu;
|
|
} else
|
|
jump->target = location;
|
|
|
|
if (list_empty(head))
|
|
jump->index = 0;
|
|
else
|
|
jump->index = list_entry(head->prev, struct jump_key,
|
|
entries)->index + 1;
|
|
|
|
list_add_tail(&jump->entries, head);
|
|
}
|
|
|
|
if (i > 0) {
|
|
str_printf(r, _(" Location:\n"));
|
|
for (j = 4; --i >= 0; j += 2) {
|
|
menu = submenu[i];
|
|
if (jump && menu == location)
|
|
jump->offset = strlen(r->s);
|
|
str_printf(r, "%*c-> %s", j, ' ',
|
|
_(menu_get_prompt(menu)));
|
|
if (menu->sym) {
|
|
str_printf(r, " (%s [=%s])", menu->sym->name ?
|
|
menu->sym->name : _("<choice>"),
|
|
sym_get_string_value(menu->sym));
|
|
}
|
|
str_append(r, "\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* get property of type P_SYMBOL
|
|
*/
|
|
static struct property *get_symbol_prop(struct symbol *sym)
|
|
{
|
|
struct property *prop = NULL;
|
|
|
|
for_all_properties(sym, prop, P_SYMBOL)
|
|
break;
|
|
return prop;
|
|
}
|
|
|
|
static void get_symbol_props_str(struct gstr *r, struct symbol *sym,
|
|
enum prop_type tok, const char *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
|
|
*/
|
|
static void get_symbol_str(struct gstr *r, struct symbol *sym,
|
|
struct list_head *head)
|
|
{
|
|
struct property *prop;
|
|
|
|
if (sym && sym->name) {
|
|
str_printf(r, "Symbol: %s [=%s]\n", sym->name,
|
|
sym_get_string_value(sym));
|
|
str_printf(r, "Type : %s\n", sym_type_name(sym->type));
|
|
if (sym->type == S_INT || sym->type == S_HEX) {
|
|
prop = sym_get_range_prop(sym);
|
|
if (prop) {
|
|
str_printf(r, "Range : ");
|
|
expr_gstr_print(prop->expr, r);
|
|
str_append(r, "\n");
|
|
}
|
|
}
|
|
}
|
|
for_all_prompts(sym, prop)
|
|
get_prompt_str(r, prop, head);
|
|
|
|
prop = get_symbol_prop(sym);
|
|
if (prop) {
|
|
str_printf(r, _(" Defined at %s:%d\n"), prop->menu->file->name,
|
|
prop->menu->lineno);
|
|
if (!expr_is_yes(prop->visible.expr)) {
|
|
str_append(r, _(" Depends on: "));
|
|
expr_gstr_print(prop->visible.expr, r);
|
|
str_append(r, "\n");
|
|
}
|
|
}
|
|
|
|
get_symbol_props_str(r, sym, P_SELECT, _(" Selects: "));
|
|
if (sym->rev_dep.expr) {
|
|
str_append(r, _(" Selected by: "));
|
|
expr_gstr_print(sym->rev_dep.expr, r);
|
|
str_append(r, "\n");
|
|
}
|
|
|
|
get_symbol_props_str(r, sym, P_IMPLY, _(" Implies: "));
|
|
if (sym->implied.expr) {
|
|
str_append(r, _(" Implied by: "));
|
|
expr_gstr_print(sym->implied.expr, r);
|
|
str_append(r, "\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;
|
|
const char *help_text = nohelp_text;
|
|
|
|
if (menu_has_help(menu)) {
|
|
if (sym->name)
|
|
str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
|
|
help_text = menu_get_help(menu);
|
|
}
|
|
str_printf(help, "%s\n", _(help_text));
|
|
if (sym)
|
|
get_symbol_str(help, sym, NULL);
|
|
}
|