xref: /openbmc/linux/scripts/kconfig/menu.c (revision a1e58bbd) 
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 		if (isspace(*prompt)) {
132 			prop_warn(prop, "leading whitespace ignored");
133 			while (isspace(*prompt))
134 				prompt++;
135 		}
136 		if (current_entry->prompt)
137 			prop_warn(prop, "prompt redefined");
138 		current_entry->prompt = prop;
139 	}
140 	prop->text = prompt;
141 
142 	return prop;
143 }
144 
145 struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
146 {
147 	return menu_add_prop(type, prompt, NULL, dep);
148 }
149 
150 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
151 {
152 	menu_add_prop(type, NULL, expr, dep);
153 }
154 
155 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
156 {
157 	menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
158 }
159 
160 void menu_add_option(int token, char *arg)
161 {
162 	struct property *prop;
163 
164 	switch (token) {
165 	case T_OPT_MODULES:
166 		prop = prop_alloc(P_DEFAULT, modules_sym);
167 		prop->expr = expr_alloc_symbol(current_entry->sym);
168 		break;
169 	case T_OPT_DEFCONFIG_LIST:
170 		if (!sym_defconfig_list)
171 			sym_defconfig_list = current_entry->sym;
172 		else if (sym_defconfig_list != current_entry->sym)
173 			zconf_error("trying to redefine defconfig symbol");
174 		break;
175 	case T_OPT_ENV:
176 		prop_add_env(arg);
177 		break;
178 	}
179 }
180 
181 static int menu_range_valid_sym(struct symbol *sym, struct symbol *sym2)
182 {
183 	return sym2->type == S_INT || sym2->type == S_HEX ||
184 	       (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
185 }
186 
187 void sym_check_prop(struct symbol *sym)
188 {
189 	struct property *prop;
190 	struct symbol *sym2;
191 	for (prop = sym->prop; prop; prop = prop->next) {
192 		switch (prop->type) {
193 		case P_DEFAULT:
194 			if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
195 			    prop->expr->type != E_SYMBOL)
196 				prop_warn(prop,
197 				    "default for config symbol '%'"
198 				    " must be a single symbol", sym->name);
199 			break;
200 		case P_SELECT:
201 			sym2 = prop_get_symbol(prop);
202 			if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
203 				prop_warn(prop,
204 				    "config symbol '%s' uses select, but is "
205 				    "not boolean or tristate", sym->name);
206 			else if (sym2->type != S_UNKNOWN &&
207 			         sym2->type != S_BOOLEAN &&
208 			         sym2->type != S_TRISTATE)
209 				prop_warn(prop,
210 				    "'%s' has wrong type. 'select' only "
211 				    "accept arguments of boolean and "
212 				    "tristate type", sym2->name);
213 			break;
214 		case P_RANGE:
215 			if (sym->type != S_INT && sym->type != S_HEX)
216 				prop_warn(prop, "range is only allowed "
217 				                "for int or hex symbols");
218 			if (!menu_range_valid_sym(sym, prop->expr->left.sym) ||
219 			    !menu_range_valid_sym(sym, prop->expr->right.sym))
220 				prop_warn(prop, "range is invalid");
221 			break;
222 		default:
223 			;
224 		}
225 	}
226 }
227 
228 void menu_finalize(struct menu *parent)
229 {
230 	struct menu *menu, *last_menu;
231 	struct symbol *sym;
232 	struct property *prop;
233 	struct expr *parentdep, *basedep, *dep, *dep2, **ep;
234 
235 	sym = parent->sym;
236 	if (parent->list) {
237 		if (sym && sym_is_choice(sym)) {
238 			/* find the first choice value and find out choice type */
239 			for (menu = parent->list; menu; menu = menu->next) {
240 				if (menu->sym) {
241 					current_entry = parent;
242 					if (sym->type == S_UNKNOWN)
243 						menu_set_type(menu->sym->type);
244 					current_entry = menu;
245 					if (menu->sym->type == S_UNKNOWN)
246 						menu_set_type(sym->type);
247 					break;
248 				}
249 			}
250 			parentdep = expr_alloc_symbol(sym);
251 		} else if (parent->prompt)
252 			parentdep = parent->prompt->visible.expr;
253 		else
254 			parentdep = parent->dep;
255 
256 		for (menu = parent->list; menu; menu = menu->next) {
257 			basedep = expr_transform(menu->dep);
258 			basedep = expr_alloc_and(expr_copy(parentdep), basedep);
259 			basedep = expr_eliminate_dups(basedep);
260 			menu->dep = basedep;
261 			if (menu->sym)
262 				prop = menu->sym->prop;
263 			else
264 				prop = menu->prompt;
265 			for (; prop; prop = prop->next) {
266 				if (prop->menu != menu)
267 					continue;
268 				dep = expr_transform(prop->visible.expr);
269 				dep = expr_alloc_and(expr_copy(basedep), dep);
270 				dep = expr_eliminate_dups(dep);
271 				if (menu->sym && menu->sym->type != S_TRISTATE)
272 					dep = expr_trans_bool(dep);
273 				prop->visible.expr = dep;
274 				if (prop->type == P_SELECT) {
275 					struct symbol *es = prop_get_symbol(prop);
276 					es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
277 							expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
278 				}
279 			}
280 		}
281 		for (menu = parent->list; menu; menu = menu->next)
282 			menu_finalize(menu);
283 	} else if (sym) {
284 		basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
285 		basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
286 		basedep = expr_eliminate_dups(expr_transform(basedep));
287 		last_menu = NULL;
288 		for (menu = parent->next; menu; menu = menu->next) {
289 			dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
290 			if (!expr_contains_symbol(dep, sym))
291 				break;
292 			if (expr_depends_symbol(dep, sym))
293 				goto next;
294 			dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
295 			dep = expr_eliminate_dups(expr_transform(dep));
296 			dep2 = expr_copy(basedep);
297 			expr_eliminate_eq(&dep, &dep2);
298 			expr_free(dep);
299 			if (!expr_is_yes(dep2)) {
300 				expr_free(dep2);
301 				break;
302 			}
303 			expr_free(dep2);
304 		next:
305 			menu_finalize(menu);
306 			menu->parent = parent;
307 			last_menu = menu;
308 		}
309 		if (last_menu) {
310 			parent->list = parent->next;
311 			parent->next = last_menu->next;
312 			last_menu->next = NULL;
313 		}
314 	}
315 	for (menu = parent->list; menu; menu = menu->next) {
316 		if (sym && sym_is_choice(sym) && menu->sym) {
317 			menu->sym->flags |= SYMBOL_CHOICEVAL;
318 			if (!menu->prompt)
319 				menu_warn(menu, "choice value must have a prompt");
320 			for (prop = menu->sym->prop; prop; prop = prop->next) {
321 				if (prop->type == P_PROMPT && prop->menu != menu) {
322 					prop_warn(prop, "choice values "
323 					    "currently only support a "
324 					    "single prompt");
325 				}
326 				if (prop->type == P_DEFAULT)
327 					prop_warn(prop, "defaults for choice "
328 					    "values not supported");
329 			}
330 			current_entry = menu;
331 			if (menu->sym->type == S_UNKNOWN)
332 				menu_set_type(sym->type);
333 			/* Non-tristate choice values of tristate choices must
334 			 * depend on the choice being set to Y. The choice
335 			 * values' dependencies were propagated to their
336 			 * properties above, so the change here must be re-
337 			 * propagated. */
338 			if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
339 				basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
340 				basedep = expr_alloc_and(basedep, menu->dep);
341 				basedep = expr_eliminate_dups(basedep);
342 				menu->dep = basedep;
343 				for (prop = menu->sym->prop; prop; prop = prop->next) {
344 					if (prop->menu != menu)
345 						continue;
346 					dep = expr_alloc_and(expr_copy(basedep),
347 							     prop->visible.expr);
348 					dep = expr_eliminate_dups(dep);
349 					dep = expr_trans_bool(dep);
350 					prop->visible.expr = dep;
351 					if (prop->type == P_SELECT) {
352 						struct symbol *es = prop_get_symbol(prop);
353 						dep2 = expr_alloc_symbol(menu->sym);
354 						dep = expr_alloc_and(dep2,
355 								     expr_copy(dep));
356 						dep = expr_alloc_or(es->rev_dep.expr, dep);
357 						dep = expr_eliminate_dups(dep);
358 						es->rev_dep.expr = dep;
359 					}
360 				}
361 			}
362 			menu_add_symbol(P_CHOICE, sym, NULL);
363 			prop = sym_get_choice_prop(sym);
364 			for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
365 				;
366 			*ep = expr_alloc_one(E_LIST, NULL);
367 			(*ep)->right.sym = menu->sym;
368 		}
369 		if (menu->list && (!menu->prompt || !menu->prompt->text)) {
370 			for (last_menu = menu->list; ; last_menu = last_menu->next) {
371 				last_menu->parent = parent;
372 				if (!last_menu->next)
373 					break;
374 			}
375 			last_menu->next = menu->next;
376 			menu->next = menu->list;
377 			menu->list = NULL;
378 		}
379 	}
380 
381 	if (sym && !(sym->flags & SYMBOL_WARNED)) {
382 		if (sym->type == S_UNKNOWN)
383 			menu_warn(parent, "config symbol defined without type");
384 
385 		if (sym_is_choice(sym) && !parent->prompt)
386 			menu_warn(parent, "choice must have a prompt");
387 
388 		/* Check properties connected to this symbol */
389 		sym_check_prop(sym);
390 		sym->flags |= SYMBOL_WARNED;
391 	}
392 
393 	if (sym && !sym_is_optional(sym) && parent->prompt) {
394 		sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
395 				expr_alloc_and(parent->prompt->visible.expr,
396 					expr_alloc_symbol(&symbol_mod)));
397 	}
398 }
399 
400 bool menu_is_visible(struct menu *menu)
401 {
402 	struct menu *child;
403 	struct symbol *sym;
404 	tristate visible;
405 
406 	if (!menu->prompt)
407 		return false;
408 	sym = menu->sym;
409 	if (sym) {
410 		sym_calc_value(sym);
411 		visible = menu->prompt->visible.tri;
412 	} else
413 		visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
414 
415 	if (visible != no)
416 		return true;
417 	if (!sym || sym_get_tristate_value(menu->sym) == no)
418 		return false;
419 
420 	for (child = menu->list; child; child = child->next)
421 		if (menu_is_visible(child))
422 			return true;
423 	return false;
424 }
425 
426 const char *menu_get_prompt(struct menu *menu)
427 {
428 	if (menu->prompt)
429 		return menu->prompt->text;
430 	else if (menu->sym)
431 		return menu->sym->name;
432 	return NULL;
433 }
434 
435 struct menu *menu_get_root_menu(struct menu *menu)
436 {
437 	return &rootmenu;
438 }
439 
440 struct menu *menu_get_parent_menu(struct menu *menu)
441 {
442 	enum prop_type type;
443 
444 	for (; menu != &rootmenu; menu = menu->parent) {
445 		type = menu->prompt ? menu->prompt->type : 0;
446 		if (type == P_MENU)
447 			break;
448 	}
449 	return menu;
450 }
451 
452 bool menu_has_help(struct menu *menu)
453 {
454 	return menu->help != NULL;
455 }
456 
457 const char *menu_get_help(struct menu *menu)
458 {
459 	if (menu->help)
460 		return menu->help;
461 	else
462 		return "";
463 }
464