[mirror_ubuntu-bionic-kernel.git] / scripts / kconfig / menu.c

/*
 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
 * Released under the terms of the GNU GPL v2.0.
 */

#include <ctype.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>

#include "lkc.h"

static const char nohelp_text[] = "There is no help available for this option.";

struct menu rootmenu;
static struct menu **last_entry_ptr;

struct file *file_list;
struct file *current_file;

void menu_warn(struct menu *menu, const char *fmt, ...)
{
	va_list ap;
	va_start(ap, fmt);
	fprintf(stderr, "%s:%d:warning: ", menu->file->name, menu->lineno);
	vfprintf(stderr, fmt, ap);
	fprintf(stderr, "\n");
	va_end(ap);
}

static void prop_warn(struct property *prop, const char *fmt, ...)
{
	va_list ap;
	va_start(ap, fmt);
	fprintf(stderr, "%s:%d:warning: ", prop->file->name, prop->lineno);
	vfprintf(stderr, fmt, ap);
	fprintf(stderr, "\n");
	va_end(ap);
}

void _menu_init(void)
{
	current_entry = current_menu = &rootmenu;
	last_entry_ptr = &rootmenu.list;
}

void menu_add_entry(struct symbol *sym)
{
	struct menu *menu;

	menu = xmalloc(sizeof(*menu));
	memset(menu, 0, sizeof(*menu));
	menu->sym = sym;
	menu->parent = current_menu;
	menu->file = current_file;
	menu->lineno = zconf_lineno();

	*last_entry_ptr = menu;
	last_entry_ptr = &menu->next;
	current_entry = menu;
	if (sym)
		menu_add_symbol(P_SYMBOL, sym, NULL);
}

void menu_end_entry(void)
{
}

struct menu *menu_add_menu(void)
{
	menu_end_entry();
	last_entry_ptr = &current_entry->list;
	return current_menu = current_entry;
}

void menu_end_menu(void)
{
	last_entry_ptr = &current_menu->next;
	current_menu = current_menu->parent;
}

static struct expr *menu_check_dep(struct expr *e)
{
	if (!e)
		return e;

	switch (e->type) {
	case E_NOT:
		e->left.expr = menu_check_dep(e->left.expr);
		break;
	case E_OR:
	case E_AND:
		e->left.expr = menu_check_dep(e->left.expr);
		e->right.expr = menu_check_dep(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;
}

void menu_add_dep(struct expr *dep)
{
	current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
}

void menu_set_type(int type)
{
	struct symbol *sym = current_entry->sym;

	if (sym->type == type)
		return;
	if (sym->type == S_UNKNOWN) {
		sym->type = type;
		return;
	}
	menu_warn(current_entry,
		"ignoring type redefinition of '%s' from '%s' to '%s'",
		sym->name ? sym->name : "<choice>",
		sym_type_name(sym->type), sym_type_name(type));
}

struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
{
	struct property *prop = prop_alloc(type, current_entry->sym);

	prop->menu = current_entry;
	prop->expr = expr;
	prop->visible.expr = menu_check_dep(dep);

	if (prompt) {
		if (isspace(*prompt)) {
			prop_warn(prop, "leading whitespace ignored");
			while (isspace(*prompt))
				prompt++;
		}
		if (current_entry->prompt && current_entry != &rootmenu)
			prop_warn(prop, "prompt redefined");

		/* Apply all upper menus' visibilities to actual prompts. */
		if(type == P_PROMPT) {
			struct menu *menu = current_entry;

			while ((menu = menu->parent) != NULL) {
				struct expr *dup_expr;

				if (!menu->visibility)
					continue;
				/*
				 * Do not add a reference to the
				 * menu's visibility expression but
				 * use a copy of it.  Otherwise the
				 * expression reduction functions
				 * will modify expressions that have
				 * multiple references which can
				 * cause unwanted side effects.
				 */
				dup_expr = expr_copy(menu->visibility);

				prop->visible.expr
					= expr_alloc_and(prop->visible.expr,
							 dup_expr);
			}
		}

		current_entry->prompt = prop;
	}
	prop->text = prompt;

	return prop;
}

struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
{
	return menu_add_prop(type, prompt, NULL, dep);
}

void menu_add_visibility(struct expr *expr)
{
	current_entry->visibility = expr_alloc_and(current_entry->visibility,
	    expr);
}

void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
{
	menu_add_prop(type, NULL, expr, dep);
}

void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
{
	menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
}

void menu_add_option(int token, char *arg)
{
	switch (token) {
	case T_OPT_MODULES:
		if (modules_sym)
			zconf_error("symbol '%s' redefines option 'modules'"
				    " already defined by symbol '%s'",
				    current_entry->sym->name,
				    modules_sym->name
				    );
		modules_sym = current_entry->sym;
		break;
	case T_OPT_DEFCONFIG_LIST:
		if (!sym_defconfig_list)
			sym_defconfig_list = current_entry->sym;
		else if (sym_defconfig_list != current_entry->sym)
			zconf_error("trying to redefine defconfig symbol");
		break;
	case T_OPT_ENV:
		prop_add_env(arg);
		break;
	case T_OPT_ALLNOCONFIG_Y:
		current_entry->sym->flags |= SYMBOL_ALLNOCONFIG_Y;
		break;
	}
}

static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
{
	return sym2->type == S_INT || sym2->type == S_HEX ||
	       (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
}

static void sym_check_prop(struct symbol *sym)
{
	struct property *prop;
	struct symbol *sym2;
	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);
			}
			break;
		case P_SELECT:
			sym2 = prop_get_symbol(prop);
			if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
				prop_warn(prop,
				    "config symbol '%s' uses select, but is "
				    "not boolean or tristate", sym->name);
			else if (sym2->type != S_UNKNOWN &&
				 sym2->type != S_BOOLEAN &&
				 sym2->type != S_TRISTATE)
				prop_warn(prop,
				    "'%s' has wrong type. 'select' only "
				    "accept arguments of boolean and "
				    "tristate type", sym2->name);
			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:
			;
		}
	}
}

void menu_finalize(struct menu *parent)
{
	struct menu *menu, *last_menu;
	struct symbol *sym;
	struct property *prop;
	struct expr *parentdep, *basedep, *dep, *dep2, **ep;

	sym = parent->sym;
	if (parent->list) {
		if (sym && sym_is_choice(sym)) {
			if (sym->type == S_UNKNOWN) {
				/* find the first choice value to find out choice type */
				current_entry = parent;
				for (menu = parent->list; menu; menu = menu->next) {
					if (menu->sym && menu->sym->type != S_UNKNOWN) {
						menu_set_type(menu->sym->type);
						break;
					}
				}
			}
			/* set the type of the remaining choice values */
			for (menu = parent->list; menu; menu = menu->next) {
				current_entry = menu;
				if (menu->sym && menu->sym->type == S_UNKNOWN)
					menu_set_type(sym->type);
			}
			parentdep = expr_alloc_symbol(sym);
		} else if (parent->prompt)
			parentdep = parent->prompt->visible.expr;
		else
			parentdep = parent->dep;

		for (menu = parent->list; menu; menu = menu->next) {
			basedep = expr_transform(menu->dep);
			basedep = expr_alloc_and(expr_copy(parentdep), basedep);
			basedep = expr_eliminate_dups(basedep);
			menu->dep = basedep;
			if (menu->sym)
				prop = menu->sym->prop;
			else
				prop = menu->prompt;
			for (; prop; prop = prop->next) {
				if (prop->menu != menu)
					continue;
				dep = expr_transform(prop->visible.expr);
				dep = expr_alloc_and(expr_copy(basedep), dep);
				dep = expr_eliminate_dups(dep);
				if (menu->sym && menu->sym->type != S_TRISTATE)
					dep = expr_trans_bool(dep);
				prop->visible.expr = dep;
				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), expr_copy(dep)));
				}
			}
		}
		for (menu = parent->list; menu; menu = menu->next)
			menu_finalize(menu);
	} else if (sym) {
		basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
		basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
		basedep = expr_eliminate_dups(expr_transform(basedep));
		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))
				break;
			if (expr_depends_symbol(dep, sym))
				goto next;
			dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
			dep = expr_eliminate_dups(expr_transform(dep));
			dep2 = expr_copy(basedep);
			expr_eliminate_eq(&dep, &dep2);
			expr_free(dep);
			if (!expr_is_yes(dep2)) {
				expr_free(dep2);
				break;
			}
			expr_free(dep2);
		next:
			menu_finalize(menu);
			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) {
		if (sym && sym_is_choice(sym) &&
		    menu->sym && !sym_is_choice_value(menu->sym)) {
			current_entry = menu;
			menu->sym->flags |= SYMBOL_CHOICEVAL;
			if (!menu->prompt)
				menu_warn(menu, "choice value must have a prompt");
			for (prop = menu->sym->prop; prop; prop = prop->next) {
				if (prop->type == P_DEFAULT)
					prop_warn(prop, "defaults for choice "
						  "values not supported");
				if (prop->menu == menu)
					continue;
				if (prop->type == P_PROMPT &&
				    prop->menu->parent->sym != sym)
					prop_warn(prop, "choice value used outside its choice group");
			}
			/* Non-tristate choice values of tristate choices must
			 * depend on the choice being set to Y. The choice
			 * values' dependencies were propagated to their
			 * properties above, so the change here must be re-
			 * propagated.
			 */
			if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
				basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
				menu->dep = expr_alloc_and(basedep, menu->dep);
				for (prop = menu->sym->prop; prop; prop = prop->next) {
					if (prop->menu != menu)
						continue;
					prop->visible.expr = expr_alloc_and(expr_copy(basedep),
									    prop->visible.expr);
				}
			}
			menu_add_symbol(P_CHOICE, sym, NULL);
			prop = sym_get_choice_prop(sym);
			for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
				;
			*ep = expr_alloc_one(E_LIST, NULL);
			(*ep)->right.sym = menu->sym;
		}
		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");

		if (sym_is_choice(sym) && !parent->prompt)
			menu_warn(parent, "choice must have a prompt");

		/* Check properties connected to this symbol */
		sym_check_prop(sym);
		sym->flags |= SYMBOL_WARNED;
	}

	if (sym && !sym_is_optional(sym) && parent->prompt) {
		sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
				expr_alloc_and(parent->prompt->visible.expr,
					expr_alloc_symbol(&symbol_mod)));
	}
}

bool menu_has_prompt(struct menu *menu)
{
	if (!menu->prompt)
		return false;
	return true;
}

/*
 * 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)
		return false;

	if (menu->visibility) {
		if (expr_calc_value(menu->visibility) == no)
			return no;
	}

	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;

	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 (head && location && 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;
}

/*
 * head is optional and may be NULL
 */
void get_symbol_str(struct gstr *r, struct symbol *sym,
		    struct list_head *head)
{
	bool hit;
	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");
		}
	}

	hit = false;
	for_all_properties(sym, prop, P_SELECT) {
		if (!hit) {
			str_append(r, "  Selects: ");
			hit = true;
		} else
			str_printf(r, " && ");
		expr_gstr_print(prop->expr, r);
	}
	if (hit)
		str_append(r, "\n");
	if (sym->rev_dep.expr) {
		str_append(r, _("  Selected by: "));
		expr_gstr_print(sym->rev_dep.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);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
	3	* Released under the terms of the GNU GPL v2.0.
	4	*/
	5
dd003306	6	#include <ctype.h>
10a4b277	7	#include <stdarg.h>
1da177e4 LT	8	#include <stdlib.h>
	9	#include <string.h>
	10
1da177e4 LT	11	#include "lkc.h"
1da177e4 LT	12
57e6292d	13	static const char nohelp_text[] = "There is no help available for this option.";
6bd5999d	14
1da177e4 LT	15	struct menu rootmenu;
	16	static struct menu **last_entry_ptr;
	17
	18	struct file *file_list;
	19	struct file *current_file;
	20
93449082	21	void menu_warn(struct menu menu, const char fmt, ...)
1da177e4 LT	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
	31	static 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
692d97c3	41	void _menu_init(void)
1da177e4 LT	42	{
	43	current_entry = current_menu = &rootmenu;
	44	last_entry_ptr = &rootmenu.list;
	45	}
	46
	47	void menu_add_entry(struct symbol *sym)
	48	{
	49	struct menu *menu;
	50
177acf78	51	menu = xmalloc(sizeof(*menu));
1da177e4 LT	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;
59e89e3d SR	61	if (sym)
59e89e3d SR	62	menu_add_symbol(P_SYMBOL, sym, NULL);
1da177e4 LT	63	}
	64
	65	void menu_end_entry(void)
	66	{
	67	}
	68
a02f0570	69	struct menu *menu_add_menu(void)
1da177e4	70	{
a02f0570	71	menu_end_entry();
1da177e4	72	last_entry_ptr = &current_entry->list;
a02f0570	73	return current_menu = current_entry;
1da177e4 LT	74	}
	75
	76	void menu_end_menu(void)
	77	{
	78	last_entry_ptr = &current_menu->next;
	79	current_menu = current_menu->parent;
	80	}
	81
4356f489	82	static struct expr menu_check_dep(struct expr e)
1da177e4 LT	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
	107	void menu_add_dep(struct expr *dep)
	108	{
	109	current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
	110	}
	111
	112	void 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	}
57540f1d MW	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));
1da177e4 LT	126	}
	127
	128	struct property menu_add_prop(enum prop_type type, char prompt, struct expr expr, struct expr dep)
	129	{
	130	struct property *prop = prop_alloc(type, current_entry->sym);
	131
	132	prop->menu = current_entry;
1da177e4 LT	133	prop->expr = expr;
	134	prop->visible.expr = menu_check_dep(dep);
	135
	136	if (prompt) {
f001f7f8 RZ	137	if (isspace(*prompt)) {
	138	prop_warn(prop, "leading whitespace ignored");
	139	while (isspace(*prompt))
	140	prompt++;
	141	}
ba6ff60d	142	if (current_entry->prompt && current_entry != &rootmenu)
f001f7f8	143	prop_warn(prop, "prompt redefined");
7ad12278 JB	144
	145	/* Apply all upper menus' visibilities to actual prompts. */
	146	if(type == P_PROMPT) {
	147	struct menu *menu = current_entry;
	148
	149	while ((menu = menu->parent) != NULL) {
e983b7b1 DG	150	struct expr *dup_expr;
e983b7b1 DG	151
7ad12278 JB	152	if (!menu->visibility)
7ad12278 JB	153	continue;
e983b7b1 DG	154	/*
	155	* Do not add a reference to the
	156	* menu's visibility expression but
	157	* use a copy of it. Otherwise the
	158	* expression reduction functions
	159	* will modify expressions that have
	160	* multiple references which can
	161	* cause unwanted side effects.
	162	*/
	163	dup_expr = expr_copy(menu->visibility);
	164
7ad12278 JB	165	prop->visible.expr
7ad12278 JB	166	= expr_alloc_and(prop->visible.expr,
e983b7b1	167	dup_expr);
7ad12278 JB	168	}
	169	}
	170
1da177e4 LT	171	current_entry->prompt = prop;
1da177e4 LT	172	}
f001f7f8	173	prop->text = prompt;
1da177e4 LT	174
	175	return prop;
	176	}
	177
fb7f6ff6	178	struct property menu_add_prompt(enum prop_type type, char prompt, struct expr *dep)
1da177e4	179	{
fb7f6ff6	180	return menu_add_prop(type, prompt, NULL, dep);
1da177e4 LT	181	}
1da177e4 LT	182
86e187ff AL	183	void menu_add_visibility(struct expr *expr)
	184	{
	185	current_entry->visibility = expr_alloc_and(current_entry->visibility,
	186	expr);
	187	}
	188
1da177e4 LT	189	void menu_add_expr(enum prop_type type, struct expr expr, struct expr dep)
	190	{
	191	menu_add_prop(type, NULL, expr, dep);
	192	}
	193
	194	void menu_add_symbol(enum prop_type type, struct symbol sym, struct expr dep)
	195	{
	196	menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
	197	}
	198
f6a88aa8 RZ	199	void menu_add_option(int token, char *arg)
f6a88aa8 RZ	200	{
face4374 RZ	201	switch (token) {
face4374 RZ	202	case T_OPT_MODULES:
e0627813 YM	203	if (modules_sym)
	204	zconf_error("symbol '%s' redefines option 'modules'"
	205	" already defined by symbol '%s'",
	206	current_entry->sym->name,
	207	modules_sym->name
	208	);
6902dccf	209	modules_sym = current_entry->sym;
face4374 RZ	210	break;
	211	case T_OPT_DEFCONFIG_LIST:
	212	if (!sym_defconfig_list)
	213	sym_defconfig_list = current_entry->sym;
	214	else if (sym_defconfig_list != current_entry->sym)
	215	zconf_error("trying to redefine defconfig symbol");
	216	break;
93449082 RZ	217	case T_OPT_ENV:
	218	prop_add_env(arg);
	219	break;
5d2acfc7 JT	220	case T_OPT_ALLNOCONFIG_Y:
	221	current_entry->sym->flags \|= SYMBOL_ALLNOCONFIG_Y;
	222	break;
face4374	223	}
f6a88aa8 RZ	224	}
f6a88aa8 RZ	225
ab60bd0b	226	static int menu_validate_number(struct symbol sym, struct symbol sym2)
4cf3cbe2 RZ	227	{
	228	return sym2->type == S_INT \|\| sym2->type == S_HEX \|\|
	229	(sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
	230	}
	231
4356f489	232	static void sym_check_prop(struct symbol *sym)
1da177e4 LT	233	{
	234	struct property *prop;
	235	struct symbol *sym2;
	236	for (prop = sym->prop; prop; prop = prop->next) {
	237	switch (prop->type) {
	238	case P_DEFAULT:
	239	if ((sym->type == S_STRING \|\| sym->type == S_INT \|\| sym->type == S_HEX) &&
	240	prop->expr->type != E_SYMBOL)
	241	prop_warn(prop,
4280eae0	242	"default for config symbol '%s'"
1da177e4	243	" must be a single symbol", sym->name);
ab60bd0b AL	244	if (prop->expr->type != E_SYMBOL)
	245	break;
	246	sym2 = prop_get_symbol(prop);
	247	if (sym->type == S_HEX \|\| sym->type == S_INT) {
	248	if (!menu_validate_number(sym, sym2))
	249	prop_warn(prop,
	250	"'%s': number is invalid",
	251	sym->name);
	252	}
1da177e4 LT	253	break;
	254	case P_SELECT:
	255	sym2 = prop_get_symbol(prop);
	256	if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
	257	prop_warn(prop,
	258	"config symbol '%s' uses select, but is "
	259	"not boolean or tristate", sym->name);
603d4988	260	else if (sym2->type != S_UNKNOWN &&
bb66fc67 MY	261	sym2->type != S_BOOLEAN &&
bb66fc67 MY	262	sym2->type != S_TRISTATE)
1da177e4 LT	263	prop_warn(prop,
	264	"'%s' has wrong type. 'select' only "
	265	"accept arguments of boolean and "
	266	"tristate type", sym2->name);
	267	break;
	268	case P_RANGE:
	269	if (sym->type != S_INT && sym->type != S_HEX)
	270	prop_warn(prop, "range is only allowed "
bb66fc67	271	"for int or hex symbols");
ab60bd0b AL	272	if (!menu_validate_number(sym, prop->expr->left.sym) \|\|
ab60bd0b AL	273	!menu_validate_number(sym, prop->expr->right.sym))
1da177e4 LT	274	prop_warn(prop, "range is invalid");
	275	break;
	276	default:
	277	;
	278	}
	279	}
	280	}
	281
	282	void menu_finalize(struct menu *parent)
	283	{
	284	struct menu menu, last_menu;
	285	struct symbol *sym;
	286	struct property *prop;
	287	struct expr parentdep, basedep, dep, dep2, **ep;
	288
	289	sym = parent->sym;
	290	if (parent->list) {
	291	if (sym && sym_is_choice(sym)) {
5a1aa8a1 RZ	292	if (sym->type == S_UNKNOWN) {
	293	/* find the first choice value to find out choice type */
	294	current_entry = parent;
	295	for (menu = parent->list; menu; menu = menu->next) {
	296	if (menu->sym && menu->sym->type != S_UNKNOWN) {
f5eaa323	297	menu_set_type(menu->sym->type);
5a1aa8a1 RZ	298	break;
5a1aa8a1 RZ	299	}
1da177e4 LT	300	}
1da177e4 LT	301	}
5a1aa8a1 RZ	302	/* set the type of the remaining choice values */
	303	for (menu = parent->list; menu; menu = menu->next) {
	304	current_entry = menu;
	305	if (menu->sym && menu->sym->type == S_UNKNOWN)
	306	menu_set_type(sym->type);
	307	}
1da177e4 LT	308	parentdep = expr_alloc_symbol(sym);
	309	} else if (parent->prompt)
	310	parentdep = parent->prompt->visible.expr;
	311	else
	312	parentdep = parent->dep;
	313
	314	for (menu = parent->list; menu; menu = menu->next) {
	315	basedep = expr_transform(menu->dep);
e8b8c977	316	basedep = expr_alloc_and(expr_copy(parentdep), basedep);
1da177e4 LT	317	basedep = expr_eliminate_dups(basedep);
	318	menu->dep = basedep;
	319	if (menu->sym)
	320	prop = menu->sym->prop;
	321	else
	322	prop = menu->prompt;
	323	for (; prop; prop = prop->next) {
	324	if (prop->menu != menu)
	325	continue;
	326	dep = expr_transform(prop->visible.expr);
	327	dep = expr_alloc_and(expr_copy(basedep), dep);
	328	dep = expr_eliminate_dups(dep);
	329	if (menu->sym && menu->sym->type != S_TRISTATE)
	330	dep = expr_trans_bool(dep);
	331	prop->visible.expr = dep;
	332	if (prop->type == P_SELECT) {
	333	struct symbol *es = prop_get_symbol(prop);
	334	es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
	335	expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
	336	}
	337	}
	338	}
	339	for (menu = parent->list; menu; menu = menu->next)
	340	menu_finalize(menu);
	341	} else if (sym) {
	342	basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
	343	basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
	344	basedep = expr_eliminate_dups(expr_transform(basedep));
	345	last_menu = NULL;
	346	for (menu = parent->next; menu; menu = menu->next) {
	347	dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
	348	if (!expr_contains_symbol(dep, sym))
	349	break;
	350	if (expr_depends_symbol(dep, sym))
	351	goto next;
	352	dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
	353	dep = expr_eliminate_dups(expr_transform(dep));
	354	dep2 = expr_copy(basedep);
	355	expr_eliminate_eq(&dep, &dep2);
	356	expr_free(dep);
	357	if (!expr_is_yes(dep2)) {
	358	expr_free(dep2);
	359	break;
	360	}
	361	expr_free(dep2);
	362	next:
	363	menu_finalize(menu);
	364	menu->parent = parent;
	365	last_menu = menu;
	366	}
	367	if (last_menu) {
	368	parent->list = parent->next;
	369	parent->next = last_menu->next;
	370	last_menu->next = NULL;
	371	}
ff5ff606	372
ec6452a5	373	sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
1da177e4 LT	374	}
1da177e4 LT	375	for (menu = parent->list; menu; menu = menu->next) {
5a1aa8a1 RZ	376	if (sym && sym_is_choice(sym) &&
	377	menu->sym && !sym_is_choice_value(menu->sym)) {
	378	current_entry = menu;
1da177e4 LT	379	menu->sym->flags \|= SYMBOL_CHOICEVAL;
	380	if (!menu->prompt)
	381	menu_warn(menu, "choice value must have a prompt");
	382	for (prop = menu->sym->prop; prop; prop = prop->next) {
1da177e4 LT	383	if (prop->type == P_DEFAULT)
1da177e4 LT	384	prop_warn(prop, "defaults for choice "
5a1aa8a1 RZ	385	"values not supported");
	386	if (prop->menu == menu)
	387	continue;
	388	if (prop->type == P_PROMPT &&
	389	prop->menu->parent->sym != sym)
	390	prop_warn(prop, "choice value used outside its choice group");
1da177e4	391	}
f5eaa323 JB	392	/* Non-tristate choice values of tristate choices must
	393	* depend on the choice being set to Y. The choice
	394	* values' dependencies were propagated to their
	395	* properties above, so the change here must be re-
5a1aa8a1 RZ	396	* propagated.
5a1aa8a1 RZ	397	*/
f5eaa323 JB	398	if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
f5eaa323 JB	399	basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
5a1aa8a1	400	menu->dep = expr_alloc_and(basedep, menu->dep);
f5eaa323 JB	401	for (prop = menu->sym->prop; prop; prop = prop->next) {
	402	if (prop->menu != menu)
	403	continue;
5a1aa8a1 RZ	404	prop->visible.expr = expr_alloc_and(expr_copy(basedep),
5a1aa8a1 RZ	405	prop->visible.expr);
f5eaa323 JB	406	}
f5eaa323 JB	407	}
1da177e4 LT	408	menu_add_symbol(P_CHOICE, sym, NULL);
	409	prop = sym_get_choice_prop(sym);
	410	for (ep = &prop->expr; ep; ep = &(ep)->left.expr)
	411	;
7a962923	412	*ep = expr_alloc_one(E_LIST, NULL);
1da177e4 LT	413	(*ep)->right.sym = menu->sym;
	414	}
	415	if (menu->list && (!menu->prompt \|\| !menu->prompt->text)) {
	416	for (last_menu = menu->list; ; last_menu = last_menu->next) {
	417	last_menu->parent = parent;
	418	if (!last_menu->next)
	419	break;
	420	}
	421	last_menu->next = menu->next;
	422	menu->next = menu->list;
	423	menu->list = NULL;
	424	}
	425	}
	426
	427	if (sym && !(sym->flags & SYMBOL_WARNED)) {
	428	if (sym->type == S_UNKNOWN)
f001f7f8	429	menu_warn(parent, "config symbol defined without type");
1da177e4 LT	430
1da177e4 LT	431	if (sym_is_choice(sym) && !parent->prompt)
f001f7f8	432	menu_warn(parent, "choice must have a prompt");
1da177e4 LT	433
	434	/* Check properties connected to this symbol */
	435	sym_check_prop(sym);
	436	sym->flags \|= SYMBOL_WARNED;
	437	}
	438
	439	if (sym && !sym_is_optional(sym) && parent->prompt) {
	440	sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
	441	expr_alloc_and(parent->prompt->visible.expr,
	442	expr_alloc_symbol(&symbol_mod)));
	443	}
	444	}
	445
22c7eca6 LZ	446	bool menu_has_prompt(struct menu *menu)
	447	{
	448	if (!menu->prompt)
	449	return false;
	450	return true;
	451	}
	452
1278ebdb DG	453	/*
	454	* Determine if a menu is empty.
	455	* A menu is considered empty if it contains no or only
	456	* invisible entries.
	457	*/
	458	bool menu_is_empty(struct menu *menu)
	459	{
	460	struct menu *child;
	461
	462	for (child = menu->list; child; child = child->next) {
	463	if (menu_is_visible(child))
	464	return(false);
	465	}
	466	return(true);
	467	}
	468
1da177e4 LT	469	bool menu_is_visible(struct menu *menu)
	470	{
	471	struct menu *child;
	472	struct symbol *sym;
	473	tristate visible;
	474
	475	if (!menu->prompt)
	476	return false;
22c7eca6	477
86e187ff AL	478	if (menu->visibility) {
	479	if (expr_calc_value(menu->visibility) == no)
	480	return no;
	481	}
	482
1da177e4 LT	483	sym = menu->sym;
	484	if (sym) {
	485	sym_calc_value(sym);
	486	visible = menu->prompt->visible.tri;
	487	} else
	488	visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
	489
	490	if (visible != no)
	491	return true;
22c7eca6	492
1da177e4 LT	493	if (!sym \|\| sym_get_tristate_value(menu->sym) == no)
	494	return false;
	495
3fb9acb3 LZ	496	for (child = menu->list; child; child = child->next) {
	497	if (menu_is_visible(child)) {
	498	if (sym)
	499	sym->flags \|= SYMBOL_DEF_USER;
1da177e4	500	return true;
3fb9acb3 LZ	501	}
3fb9acb3 LZ	502	}
22c7eca6	503
1da177e4 LT	504	return false;
	505	}
	506
	507	const char menu_get_prompt(struct menu menu)
	508	{
	509	if (menu->prompt)
01771b0f	510	return menu->prompt->text;
1da177e4	511	else if (menu->sym)
01771b0f	512	return menu->sym->name;
1da177e4 LT	513	return NULL;
	514	}
	515
	516	struct menu menu_get_root_menu(struct menu menu)
	517	{
	518	return &rootmenu;
	519	}
	520
	521	struct menu menu_get_parent_menu(struct menu menu)
	522	{
	523	enum prop_type type;
	524
	525	for (; menu != &rootmenu; menu = menu->parent) {
	526	type = menu->prompt ? menu->prompt->type : 0;
	527	if (type == P_MENU)
	528	break;
	529	}
	530	return menu;
	531	}
	532
03d29122 SR	533	bool menu_has_help(struct menu *menu)
	534	{
	535	return menu->help != NULL;
	536	}
	537
	538	const char menu_get_help(struct menu menu)
	539	{
	540	if (menu->help)
	541	return menu->help;
	542	else
	543	return "";
	544	}
6bd5999d	545
95ac9b3b	546	static void get_prompt_str(struct gstr r, struct property prop,
bad9955d	547	struct list_head *head)
6bd5999d CR	548	{
6bd5999d CR	549	int i, j;
5e609add	550	struct menu submenu[8], menu, *location = NULL;
95ac9b3b	551	struct jump_key *jump;
6bd5999d CR	552
6bd5999d CR	553	str_printf(r, _("Prompt: %s\n"), _(prop->text));
6bd5999d	554	menu = prop->menu->parent;
5e609add BP	555	for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
	556	bool accessible = menu_is_visible(menu);
	557
6bd5999d	558	submenu[i++] = menu;
5e609add BP	559	if (location == NULL && accessible)
	560	location = menu;
	561	}
95ac9b3b	562	if (head && location) {
177acf78	563	jump = xmalloc(sizeof(struct jump_key));
95ac9b3b	564
5e609add BP	565	if (menu_is_visible(prop->menu)) {
	566	/*
	567	* There is not enough room to put the hint at the
	568	* beginning of the "Prompt" line. Put the hint on the
	569	* last "Location" line even when it would belong on
	570	* the former.
	571	*/
95ac9b3b	572	jump->target = prop->menu;
5e609add	573	} else
95ac9b3b BP	574	jump->target = location;
95ac9b3b BP	575
bad9955d	576	if (list_empty(head))
95ac9b3b BP	577	jump->index = 0;
95ac9b3b BP	578	else
bad9955d BP	579	jump->index = list_entry(head->prev, struct jump_key,
bad9955d BP	580	entries)->index + 1;
95ac9b3b	581
bad9955d	582	list_add_tail(&jump->entries, head);
95ac9b3b	583	}
5e609add	584
6bd5999d CR	585	if (i > 0) {
6bd5999d CR	586	str_printf(r, _(" Location:\n"));
95ac9b3b	587	for (j = 4; --i >= 0; j += 2) {
6bd5999d	588	menu = submenu[i];
95ac9b3b	589	if (head && location && menu == location)
503c8230	590	jump->offset = strlen(r->s);
95ac9b3b BP	591	str_printf(r, "%*c-> %s", j, ' ',
95ac9b3b BP	592	_(menu_get_prompt(menu)));
6bd5999d CR	593	if (menu->sym) {
	594	str_printf(r, " (%s [=%s])", menu->sym->name ?
	595	menu->sym->name : _("<choice>"),
	596	sym_get_string_value(menu->sym));
	597	}
	598	str_append(r, "\n");
	599	}
	600	}
	601	}
	602
bcdedcc1	603	/*
8d9dfe82	604	* get property of type P_SYMBOL
bcdedcc1 W	605	*/
	606	static struct property get_symbol_prop(struct symbol sym)
	607	{
	608	struct property *prop = NULL;
	609
	610	for_all_properties(sym, prop, P_SYMBOL)
	611	break;
	612	return prop;
	613	}
	614
5e609add	615	/*
95ac9b3b	616	* head is optional and may be NULL
5e609add	617	*/
bad9955d BP	618	void get_symbol_str(struct gstr r, struct symbol sym,
bad9955d BP	619	struct list_head *head)
6bd5999d CR	620	{
	621	bool hit;
	622	struct property *prop;
	623
b040b44c	624	if (sym && sym->name) {
6bd5999d CR	625	str_printf(r, "Symbol: %s [=%s]\n", sym->name,
6bd5999d CR	626	sym_get_string_value(sym));
b040b44c	627	str_printf(r, "Type : %s\n", sym_type_name(sym->type));
70ed0747 LZ	628	if (sym->type == S_INT \|\| sym->type == S_HEX) {
	629	prop = sym_get_range_prop(sym);
	630	if (prop) {
	631	str_printf(r, "Range : ");
	632	expr_gstr_print(prop->expr, r);
	633	str_append(r, "\n");
	634	}
	635	}
b040b44c	636	}
6bd5999d	637	for_all_prompts(sym, prop)
95ac9b3b	638	get_prompt_str(r, prop, head);
383da76f	639
bcdedcc1	640	prop = get_symbol_prop(sym);
383da76f LZ	641	if (prop) {
	642	str_printf(r, _(" Defined at %s:%d\n"), prop->menu->file->name,
	643	prop->menu->lineno);
	644	if (!expr_is_yes(prop->visible.expr)) {
	645	str_append(r, _(" Depends on: "));
	646	expr_gstr_print(prop->visible.expr, r);
	647	str_append(r, "\n");
	648	}
bcdedcc1	649	}
383da76f	650
6bd5999d CR	651	hit = false;
	652	for_all_properties(sym, prop, P_SELECT) {
	653	if (!hit) {
	654	str_append(r, " Selects: ");
	655	hit = true;
	656	} else
	657	str_printf(r, " && ");
	658	expr_gstr_print(prop->expr, r);
	659	}
	660	if (hit)
	661	str_append(r, "\n");
	662	if (sym->rev_dep.expr) {
	663	str_append(r, _(" Selected by: "));
	664	expr_gstr_print(sym->rev_dep.expr, r);
	665	str_append(r, "\n");
	666	}
	667	str_append(r, "\n\n");
	668	}
	669
bad9955d	670	struct gstr get_relations_str(struct symbol *sym_arr, struct list_head head)
692d97c3	671	{
	672	struct symbol *sym;
	673	struct gstr res = str_new();
95ac9b3b	674	int i;
692d97c3	675
692d97c3	676	for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
95ac9b3b	677	get_symbol_str(&res, sym, head);
692d97c3	678	if (!i)
	679	str_append(&res, _("No matches found.\n"));
	680	return res;
	681	}
	682
	683
6bd5999d CR	684	void menu_get_ext_help(struct menu menu, struct gstr help)
	685	{
	686	struct symbol *sym = menu->sym;
57e6292d	687	const char *help_text = nohelp_text;
6bd5999d CR	688
6bd5999d CR	689	if (menu_has_help(menu)) {
3f198dfe	690	if (sym->name)
ffb5957b	691	str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
57e6292d	692	help_text = menu_get_help(menu);
6bd5999d	693	}
57e6292d	694	str_printf(help, "%s\n", _(help_text));
4779105e	695	if (sym)
95ac9b3b	696	get_symbol_str(help, sym, NULL);
6bd5999d	697	}