/*

  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>

  * Released under the terms of the GNU GPL v2.0.

  */

 #include <stdlib.h>

 #include <string.h>

 #define LKC_DIRECT_LINK

 #include "lkc.h"

 struct menu rootmenu;

 static struct menu **last_entry_ptr;

 struct file *file_list;

 struct file *current_file;

 static 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 = malloc(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;

 }

 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;

 }

 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, "type of '%s' redefined 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)

 			prop_warn(prop, "prompt redefined");

 		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_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)

 {

 	struct property *prop;

 	switch (token) {

 	case T_OPT_MODULES:

 		prop = prop_alloc(P_DEFAULT, modules_sym);

 		prop->expr = expr_alloc_symbol(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;

 	}

 }

 static int menu_range_valid_sym(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));

 }

 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 '%'"

 				    " must be a single symbol", 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)

 				prop_warn(prop,

 				    "'select' used by config symbol '%s' "

 				    "refer to undefined symbol '%s'",

 				    sym->name, sym2->name);

 			else if (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_range_valid_sym(sym, prop->expr->left.sym) ||

 			    !menu_range_valid_sym(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)) {

 			/* find the first choice value and find out choice type */

 			for (menu = parent->list; menu; menu = menu->next) {

 				if (menu->sym) {

 					current_entry = parent;

 					menu_set_type(menu->sym->type);

 					current_entry = menu;

 					menu_set_type(sym->type);

 					break;

 				}

 			}

 			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;

 		}

 	}

 	for (menu = parent->list; menu; menu = menu->next) {

 		if (sym && sym_is_choice(sym) && menu->sym) {

 			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_PROMPT && prop->menu != menu) {

 					prop_warn(prop, "choice values "

 					    "currently only support a "

 					    "single prompt");

 				}

 				if (prop->type == P_DEFAULT)

 					prop_warn(prop, "defaults for choice "

 					    "values not supported");

 			}

 			current_entry = menu;

 			menu_set_type(sym->type);

 			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_CHOICE, 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_is_visible(struct menu *menu)

 {

 	struct menu *child;

 	struct symbol *sym;

 	tristate visible;

 	if (!menu->prompt)

 		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))

 			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;

 }