kconfig/menu.c
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Tue Jan 12 19:24:03 2010 +0100 (2010-01-12)
changeset 1761 88020b2c3246
parent 943 1cca90ce0481
child 2448 a103abae1560
permissions -rw-r--r--
scripts/functions: change handling of nochdir

- 'nochdir' must be the first option
- have systematic pushd/popd, even if nochdir
     1 /*
     2  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
     3  * Released under the terms of the GNU GPL v2.0.
     4  */
     5 
     6 #include <stdlib.h>
     7 #include <string.h>
     8 
     9 #define LKC_DIRECT_LINK
    10 #include "lkc.h"
    11 
    12 struct menu rootmenu;
    13 static struct menu **last_entry_ptr;
    14 
    15 struct file *file_list;
    16 struct file *current_file;
    17 
    18 void menu_warn(struct menu *menu, const char *fmt, ...)
    19 {
    20 	va_list ap;
    21 	va_start(ap, fmt);
    22 	fprintf(stderr, "%s:%d:warning: ", menu->file->name, menu->lineno);
    23 	vfprintf(stderr, fmt, ap);
    24 	fprintf(stderr, "\n");
    25 	va_end(ap);
    26 }
    27 
    28 static void prop_warn(struct property *prop, const char *fmt, ...)
    29 {
    30 	va_list ap;
    31 	va_start(ap, fmt);
    32 	fprintf(stderr, "%s:%d:warning: ", prop->file->name, prop->lineno);
    33 	vfprintf(stderr, fmt, ap);
    34 	fprintf(stderr, "\n");
    35 	va_end(ap);
    36 }
    37 
    38 void menu_init(void)
    39 {
    40 	current_entry = current_menu = &rootmenu;
    41 	last_entry_ptr = &rootmenu.list;
    42 }
    43 
    44 void menu_add_entry(struct symbol *sym)
    45 {
    46 	struct menu *menu;
    47 
    48 	menu = malloc(sizeof(*menu));
    49 	memset(menu, 0, sizeof(*menu));
    50 	menu->sym = sym;
    51 	menu->parent = current_menu;
    52 	menu->file = current_file;
    53 	menu->lineno = zconf_lineno();
    54 
    55 	*last_entry_ptr = menu;
    56 	last_entry_ptr = &menu->next;
    57 	current_entry = menu;
    58 }
    59 
    60 void menu_end_entry(void)
    61 {
    62 }
    63 
    64 struct menu *menu_add_menu(void)
    65 {
    66 	menu_end_entry();
    67 	last_entry_ptr = &current_entry->list;
    68 	return current_menu = current_entry;
    69 }
    70 
    71 void menu_end_menu(void)
    72 {
    73 	last_entry_ptr = &current_menu->next;
    74 	current_menu = current_menu->parent;
    75 }
    76 
    77 struct expr *menu_check_dep(struct expr *e)
    78 {
    79 	if (!e)
    80 		return e;
    81 
    82 	switch (e->type) {
    83 	case E_NOT:
    84 		e->left.expr = menu_check_dep(e->left.expr);
    85 		break;
    86 	case E_OR:
    87 	case E_AND:
    88 		e->left.expr = menu_check_dep(e->left.expr);
    89 		e->right.expr = menu_check_dep(e->right.expr);
    90 		break;
    91 	case E_SYMBOL:
    92 		/* change 'm' into 'm' && MODULES */
    93 		if (e->left.sym == &symbol_mod)
    94 			return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
    95 		break;
    96 	default:
    97 		break;
    98 	}
    99 	return e;
   100 }
   101 
   102 void menu_add_dep(struct expr *dep)
   103 {
   104 	current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
   105 }
   106 
   107 void menu_set_type(int type)
   108 {
   109 	struct symbol *sym = current_entry->sym;
   110 
   111 	if (sym->type == type)
   112 		return;
   113 	if (sym->type == S_UNKNOWN) {
   114 		sym->type = type;
   115 		return;
   116 	}
   117 	menu_warn(current_entry, "type of '%s' redefined from '%s' to '%s'",
   118 	    sym->name ? sym->name : "<choice>",
   119 	    sym_type_name(sym->type), sym_type_name(type));
   120 }
   121 
   122 struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
   123 {
   124 	struct property *prop = prop_alloc(type, current_entry->sym);
   125 
   126 	prop->menu = current_entry;
   127 	prop->expr = expr;
   128 	prop->visible.expr = menu_check_dep(dep);
   129 
   130 	if (prompt) {
   131 		/* For crostool-NG, a leading pipe followed with spaces
   132 		 * means that pipe shall be removed, and the spaces should
   133 		 * not be trimmed.
   134 		 */
   135 		if (*prompt == '|')
   136 			prompt++;
   137 		else if (isspace(*prompt)) {
   138 			/* Silently trim leading spaces */
   139 			while (isspace(*prompt))
   140 				prompt++;
   141 		}
   142 		if (current_entry->prompt)
   143 			prop_warn(prop, "prompt redefined");
   144 		current_entry->prompt = prop;
   145 	}
   146 	prop->text = prompt;
   147 
   148 	return prop;
   149 }
   150 
   151 struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
   152 {
   153 	return menu_add_prop(type, prompt, NULL, dep);
   154 }
   155 
   156 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
   157 {
   158 	menu_add_prop(type, NULL, expr, dep);
   159 }
   160 
   161 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
   162 {
   163 	menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
   164 }
   165 
   166 void menu_add_option(int token, char *arg)
   167 {
   168 	struct property *prop;
   169 
   170 	switch (token) {
   171 	case T_OPT_MODULES:
   172 		prop = prop_alloc(P_DEFAULT, modules_sym);
   173 		prop->expr = expr_alloc_symbol(current_entry->sym);
   174 		break;
   175 	case T_OPT_DEFCONFIG_LIST:
   176 		if (!sym_defconfig_list)
   177 			sym_defconfig_list = current_entry->sym;
   178 		else if (sym_defconfig_list != current_entry->sym)
   179 			zconf_error("trying to redefine defconfig symbol");
   180 		break;
   181 	case T_OPT_ENV:
   182 		prop_add_env(arg);
   183 		break;
   184 	}
   185 }
   186 
   187 static int menu_range_valid_sym(struct symbol *sym, struct symbol *sym2)
   188 {
   189 	return sym2->type == S_INT || sym2->type == S_HEX ||
   190 	       (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
   191 }
   192 
   193 void sym_check_prop(struct symbol *sym)
   194 {
   195 	struct property *prop;
   196 	struct symbol *sym2;
   197 	for (prop = sym->prop; prop; prop = prop->next) {
   198 		switch (prop->type) {
   199 		case P_DEFAULT:
   200 			if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
   201 			    prop->expr->type != E_SYMBOL)
   202 				prop_warn(prop,
   203 				    "default for config symbol '%'"
   204 				    " must be a single symbol", sym->name);
   205 			break;
   206 		case P_SELECT:
   207 			sym2 = prop_get_symbol(prop);
   208 			if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
   209 				prop_warn(prop,
   210 				    "config symbol '%s' uses select, but is "
   211 				    "not boolean or tristate", sym->name);
   212 			else if (sym2->type != S_UNKNOWN &&
   213 			         sym2->type != S_BOOLEAN &&
   214 			         sym2->type != S_TRISTATE)
   215 				prop_warn(prop,
   216 				    "'%s' has wrong type. 'select' only "
   217 				    "accept arguments of boolean and "
   218 				    "tristate type", sym2->name);
   219 			break;
   220 		case P_RANGE:
   221 			if (sym->type != S_INT && sym->type != S_HEX)
   222 				prop_warn(prop, "range is only allowed "
   223 				                "for int or hex symbols");
   224 			if (!menu_range_valid_sym(sym, prop->expr->left.sym) ||
   225 			    !menu_range_valid_sym(sym, prop->expr->right.sym))
   226 				prop_warn(prop, "range is invalid");
   227 			break;
   228 		default:
   229 			;
   230 		}
   231 	}
   232 }
   233 
   234 void menu_finalize(struct menu *parent)
   235 {
   236 	struct menu *menu, *last_menu;
   237 	struct symbol *sym;
   238 	struct property *prop;
   239 	struct expr *parentdep, *basedep, *dep, *dep2, **ep;
   240 
   241 	sym = parent->sym;
   242 	if (parent->list) {
   243 		if (sym && sym_is_choice(sym)) {
   244 			if (sym->type == S_UNKNOWN) {
   245 				/* find the first choice value to find out choice type */
   246 				current_entry = parent;
   247 				for (menu = parent->list; menu; menu = menu->next) {
   248 					if (menu->sym && menu->sym->type != S_UNKNOWN) {
   249 						menu_set_type(menu->sym->type);
   250 						break;
   251 					}
   252 				}
   253 			}
   254 			/* set the type of the remaining choice values */
   255 			for (menu = parent->list; menu; menu = menu->next) {
   256 				current_entry = menu;
   257 				if (menu->sym && menu->sym->type == S_UNKNOWN)
   258 					menu_set_type(sym->type);
   259 			}
   260 			parentdep = expr_alloc_symbol(sym);
   261 		} else if (parent->prompt)
   262 			parentdep = parent->prompt->visible.expr;
   263 		else
   264 			parentdep = parent->dep;
   265 
   266 		for (menu = parent->list; menu; menu = menu->next) {
   267 			basedep = expr_transform(menu->dep);
   268 			basedep = expr_alloc_and(expr_copy(parentdep), basedep);
   269 			basedep = expr_eliminate_dups(basedep);
   270 			menu->dep = basedep;
   271 			if (menu->sym)
   272 				prop = menu->sym->prop;
   273 			else
   274 				prop = menu->prompt;
   275 			for (; prop; prop = prop->next) {
   276 				if (prop->menu != menu)
   277 					continue;
   278 				dep = expr_transform(prop->visible.expr);
   279 				dep = expr_alloc_and(expr_copy(basedep), dep);
   280 				dep = expr_eliminate_dups(dep);
   281 				if (menu->sym && menu->sym->type != S_TRISTATE)
   282 					dep = expr_trans_bool(dep);
   283 				prop->visible.expr = dep;
   284 				if (prop->type == P_SELECT) {
   285 					struct symbol *es = prop_get_symbol(prop);
   286 					es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
   287 							expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
   288 				}
   289 			}
   290 		}
   291 		for (menu = parent->list; menu; menu = menu->next)
   292 			menu_finalize(menu);
   293 	} else if (sym) {
   294 		basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
   295 		basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
   296 		basedep = expr_eliminate_dups(expr_transform(basedep));
   297 		last_menu = NULL;
   298 		for (menu = parent->next; menu; menu = menu->next) {
   299 			dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
   300 			if (!expr_contains_symbol(dep, sym))
   301 				break;
   302 			if (expr_depends_symbol(dep, sym))
   303 				goto next;
   304 			dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
   305 			dep = expr_eliminate_dups(expr_transform(dep));
   306 			dep2 = expr_copy(basedep);
   307 			expr_eliminate_eq(&dep, &dep2);
   308 			expr_free(dep);
   309 			if (!expr_is_yes(dep2)) {
   310 				expr_free(dep2);
   311 				break;
   312 			}
   313 			expr_free(dep2);
   314 		next:
   315 			menu_finalize(menu);
   316 			menu->parent = parent;
   317 			last_menu = menu;
   318 		}
   319 		if (last_menu) {
   320 			parent->list = parent->next;
   321 			parent->next = last_menu->next;
   322 			last_menu->next = NULL;
   323 		}
   324 	}
   325 	for (menu = parent->list; menu; menu = menu->next) {
   326 		if (sym && sym_is_choice(sym) &&
   327 		    menu->sym && !sym_is_choice_value(menu->sym)) {
   328 			current_entry = menu;
   329 			menu->sym->flags |= SYMBOL_CHOICEVAL;
   330 			if (!menu->prompt)
   331 				menu_warn(menu, "choice value must have a prompt");
   332 			for (prop = menu->sym->prop; prop; prop = prop->next) {
   333 				if (prop->type == P_DEFAULT)
   334 					prop_warn(prop, "defaults for choice "
   335 						  "values not supported");
   336 				if (prop->menu == menu)
   337 					continue;
   338 				if (prop->type == P_PROMPT &&
   339 				    prop->menu->parent->sym != sym)
   340 					prop_warn(prop, "choice value used outside its choice group");
   341 			}
   342 			/* Non-tristate choice values of tristate choices must
   343 			 * depend on the choice being set to Y. The choice
   344 			 * values' dependencies were propagated to their
   345 			 * properties above, so the change here must be re-
   346 			 * propagated.
   347 			 */
   348 			if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
   349 				basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
   350 				menu->dep = expr_alloc_and(basedep, menu->dep);
   351 				for (prop = menu->sym->prop; prop; prop = prop->next) {
   352 					if (prop->menu != menu)
   353 						continue;
   354 					prop->visible.expr = expr_alloc_and(expr_copy(basedep),
   355 									    prop->visible.expr);
   356 				}
   357 			}
   358 			menu_add_symbol(P_CHOICE, sym, NULL);
   359 			prop = sym_get_choice_prop(sym);
   360 			for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
   361 				;
   362 			*ep = expr_alloc_one(E_LIST, NULL);
   363 			(*ep)->right.sym = menu->sym;
   364 		}
   365 		if (menu->list && (!menu->prompt || !menu->prompt->text)) {
   366 			for (last_menu = menu->list; ; last_menu = last_menu->next) {
   367 				last_menu->parent = parent;
   368 				if (!last_menu->next)
   369 					break;
   370 			}
   371 			last_menu->next = menu->next;
   372 			menu->next = menu->list;
   373 			menu->list = NULL;
   374 		}
   375 	}
   376 
   377 	if (sym && !(sym->flags & SYMBOL_WARNED)) {
   378 		if (sym->type == S_UNKNOWN)
   379 			menu_warn(parent, "config symbol defined without type");
   380 
   381 		if (sym_is_choice(sym) && !parent->prompt)
   382 			menu_warn(parent, "choice must have a prompt");
   383 
   384 		/* Check properties connected to this symbol */
   385 		sym_check_prop(sym);
   386 		sym->flags |= SYMBOL_WARNED;
   387 	}
   388 
   389 	if (sym && !sym_is_optional(sym) && parent->prompt) {
   390 		sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
   391 				expr_alloc_and(parent->prompt->visible.expr,
   392 					expr_alloc_symbol(&symbol_mod)));
   393 	}
   394 }
   395 
   396 bool menu_is_visible(struct menu *menu)
   397 {
   398 	struct menu *child;
   399 	struct symbol *sym;
   400 	tristate visible;
   401 
   402 	if (!menu->prompt)
   403 		return false;
   404 	sym = menu->sym;
   405 	if (sym) {
   406 		sym_calc_value(sym);
   407 		visible = menu->prompt->visible.tri;
   408 	} else
   409 		visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
   410 
   411 	if (visible != no)
   412 		return true;
   413 	if (!sym || sym_get_tristate_value(menu->sym) == no)
   414 		return false;
   415 
   416 	for (child = menu->list; child; child = child->next)
   417 		if (menu_is_visible(child))
   418 			return true;
   419 	return false;
   420 }
   421 
   422 const char *menu_get_prompt(struct menu *menu)
   423 {
   424 	if (menu->prompt)
   425 		return menu->prompt->text;
   426 	else if (menu->sym)
   427 		return menu->sym->name;
   428 	return NULL;
   429 }
   430 
   431 struct menu *menu_get_root_menu(struct menu *menu)
   432 {
   433 	return &rootmenu;
   434 }
   435 
   436 struct menu *menu_get_parent_menu(struct menu *menu)
   437 {
   438 	enum prop_type type;
   439 
   440 	for (; menu != &rootmenu; menu = menu->parent) {
   441 		type = menu->prompt ? menu->prompt->type : 0;
   442 		if (type == P_MENU)
   443 			break;
   444 	}
   445 	return menu;
   446 }
   447 
   448 bool menu_has_help(struct menu *menu)
   449 {
   450 	return menu->help != NULL;
   451 }
   452 
   453 const char *menu_get_help(struct menu *menu)
   454 {
   455 	if (menu->help)
   456 		return menu->help;
   457 	else
   458 		return "";
   459 }