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menu.c 17 KB

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  1. /*
  2. * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
  3. * Released under the terms of the GNU GPL v2.0.
  4. */
  5. #include <ctype.h>
  6. #include <stdarg.h>
  7. #include <stdlib.h>
  8. #include <string.h>
  9. #include "lkc.h"
  10. static const char nohelp_text[] = "There is no help available for this option.";
  11. struct menu rootmenu;
  12. static struct menu **last_entry_ptr;
  13. struct file *file_list;
  14. struct file *current_file;
  15. void menu_warn(struct menu *menu, const char *fmt, ...)
  16. {
  17. va_list ap;
  18. va_start(ap, fmt);
  19. fprintf(stderr, "%s:%d:warning: ", menu->file->name, menu->lineno);
  20. vfprintf(stderr, fmt, ap);
  21. fprintf(stderr, "\n");
  22. va_end(ap);
  23. }
  24. static void prop_warn(struct property *prop, const char *fmt, ...)
  25. {
  26. va_list ap;
  27. va_start(ap, fmt);
  28. fprintf(stderr, "%s:%d:warning: ", prop->file->name, prop->lineno);
  29. vfprintf(stderr, fmt, ap);
  30. fprintf(stderr, "\n");
  31. va_end(ap);
  32. }
  33. void _menu_init(void)
  34. {
  35. current_entry = current_menu = &rootmenu;
  36. last_entry_ptr = &rootmenu.list;
  37. }
  38. void menu_add_entry(struct symbol *sym)
  39. {
  40. struct menu *menu;
  41. menu = xmalloc(sizeof(*menu));
  42. memset(menu, 0, sizeof(*menu));
  43. menu->sym = sym;
  44. menu->parent = current_menu;
  45. menu->file = current_file;
  46. menu->lineno = zconf_lineno();
  47. *last_entry_ptr = menu;
  48. last_entry_ptr = &menu->next;
  49. current_entry = menu;
  50. if (sym)
  51. menu_add_symbol(P_SYMBOL, sym, NULL);
  52. }
  53. void menu_end_entry(void)
  54. {
  55. }
  56. struct menu *menu_add_menu(void)
  57. {
  58. menu_end_entry();
  59. last_entry_ptr = &current_entry->list;
  60. return current_menu = current_entry;
  61. }
  62. void menu_end_menu(void)
  63. {
  64. last_entry_ptr = &current_menu->next;
  65. current_menu = current_menu->parent;
  66. }
  67. static struct expr *menu_check_dep(struct expr *e)
  68. {
  69. if (!e)
  70. return e;
  71. switch (e->type) {
  72. case E_NOT:
  73. e->left.expr = menu_check_dep(e->left.expr);
  74. break;
  75. case E_OR:
  76. case E_AND:
  77. e->left.expr = menu_check_dep(e->left.expr);
  78. e->right.expr = menu_check_dep(e->right.expr);
  79. break;
  80. case E_SYMBOL:
  81. /* change 'm' into 'm' && MODULES */
  82. if (e->left.sym == &symbol_mod)
  83. return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
  84. break;
  85. default:
  86. break;
  87. }
  88. return e;
  89. }
  90. void menu_add_dep(struct expr *dep)
  91. {
  92. current_entry->dep = expr_alloc_and(current_entry->dep, menu_check_dep(dep));
  93. }
  94. void menu_set_type(int type)
  95. {
  96. struct symbol *sym = current_entry->sym;
  97. if (sym->type == type)
  98. return;
  99. if (sym->type == S_UNKNOWN) {
  100. sym->type = type;
  101. return;
  102. }
  103. menu_warn(current_entry,
  104. "ignoring type redefinition of '%s' from '%s' to '%s'",
  105. sym->name ? sym->name : "<choice>",
  106. sym_type_name(sym->type), sym_type_name(type));
  107. }
  108. struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
  109. {
  110. struct property *prop = prop_alloc(type, current_entry->sym);
  111. prop->menu = current_entry;
  112. prop->expr = expr;
  113. prop->visible.expr = menu_check_dep(dep);
  114. if (prompt) {
  115. if (isspace(*prompt)) {
  116. prop_warn(prop, "leading whitespace ignored");
  117. while (isspace(*prompt))
  118. prompt++;
  119. }
  120. if (current_entry->prompt && current_entry != &rootmenu)
  121. prop_warn(prop, "prompt redefined");
  122. /* Apply all upper menus' visibilities to actual prompts. */
  123. if(type == P_PROMPT) {
  124. struct menu *menu = current_entry;
  125. while ((menu = menu->parent) != NULL) {
  126. struct expr *dup_expr;
  127. if (!menu->visibility)
  128. continue;
  129. /*
  130. * Do not add a reference to the
  131. * menu's visibility expression but
  132. * use a copy of it. Otherwise the
  133. * expression reduction functions
  134. * will modify expressions that have
  135. * multiple references which can
  136. * cause unwanted side effects.
  137. */
  138. dup_expr = expr_copy(menu->visibility);
  139. prop->visible.expr
  140. = expr_alloc_and(prop->visible.expr,
  141. dup_expr);
  142. }
  143. }
  144. current_entry->prompt = prop;
  145. }
  146. prop->text = prompt;
  147. return prop;
  148. }
  149. struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
  150. {
  151. return menu_add_prop(type, prompt, NULL, dep);
  152. }
  153. void menu_add_visibility(struct expr *expr)
  154. {
  155. current_entry->visibility = expr_alloc_and(current_entry->visibility,
  156. expr);
  157. }
  158. void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
  159. {
  160. menu_add_prop(type, NULL, expr, dep);
  161. }
  162. void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
  163. {
  164. menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
  165. }
  166. void menu_add_option(int token, char *arg)
  167. {
  168. switch (token) {
  169. case T_OPT_MODULES:
  170. if (modules_sym)
  171. zconf_error("symbol '%s' redefines option 'modules'"
  172. " already defined by symbol '%s'",
  173. current_entry->sym->name,
  174. modules_sym->name
  175. );
  176. modules_sym = current_entry->sym;
  177. break;
  178. case T_OPT_DEFCONFIG_LIST:
  179. if (!sym_defconfig_list)
  180. sym_defconfig_list = current_entry->sym;
  181. else if (sym_defconfig_list != current_entry->sym)
  182. zconf_error("trying to redefine defconfig symbol");
  183. break;
  184. case T_OPT_ENV:
  185. prop_add_env(arg);
  186. break;
  187. case T_OPT_ALLNOCONFIG_Y:
  188. current_entry->sym->flags |= SYMBOL_ALLNOCONFIG_Y;
  189. break;
  190. }
  191. }
  192. static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
  193. {
  194. return sym2->type == S_INT || sym2->type == S_HEX ||
  195. (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
  196. }
  197. static void sym_check_prop(struct symbol *sym)
  198. {
  199. struct property *prop;
  200. struct symbol *sym2;
  201. for (prop = sym->prop; prop; prop = prop->next) {
  202. switch (prop->type) {
  203. case P_DEFAULT:
  204. if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
  205. prop->expr->type != E_SYMBOL)
  206. prop_warn(prop,
  207. "default for config symbol '%s'"
  208. " must be a single symbol", sym->name);
  209. if (prop->expr->type != E_SYMBOL)
  210. break;
  211. sym2 = prop_get_symbol(prop);
  212. if (sym->type == S_HEX || sym->type == S_INT) {
  213. if (!menu_validate_number(sym, sym2))
  214. prop_warn(prop,
  215. "'%s': number is invalid",
  216. sym->name);
  217. }
  218. break;
  219. case P_SELECT:
  220. sym2 = prop_get_symbol(prop);
  221. if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
  222. prop_warn(prop,
  223. "config symbol '%s' uses select, but is "
  224. "not boolean or tristate", sym->name);
  225. else if (sym2->type != S_UNKNOWN &&
  226. sym2->type != S_BOOLEAN &&
  227. sym2->type != S_TRISTATE)
  228. prop_warn(prop,
  229. "'%s' has wrong type. 'select' only "
  230. "accept arguments of boolean and "
  231. "tristate type", sym2->name);
  232. break;
  233. case P_RANGE:
  234. if (sym->type != S_INT && sym->type != S_HEX)
  235. prop_warn(prop, "range is only allowed "
  236. "for int or hex symbols");
  237. if (!menu_validate_number(sym, prop->expr->left.sym) ||
  238. !menu_validate_number(sym, prop->expr->right.sym))
  239. prop_warn(prop, "range is invalid");
  240. break;
  241. default:
  242. ;
  243. }
  244. }
  245. }
  246. void menu_finalize(struct menu *parent)
  247. {
  248. struct menu *menu, *last_menu;
  249. struct symbol *sym;
  250. struct property *prop;
  251. struct expr *parentdep, *basedep, *dep, *dep2, **ep;
  252. sym = parent->sym;
  253. if (parent->list) {
  254. if (sym && sym_is_choice(sym)) {
  255. if (sym->type == S_UNKNOWN) {
  256. /* find the first choice value to find out choice type */
  257. current_entry = parent;
  258. for (menu = parent->list; menu; menu = menu->next) {
  259. if (menu->sym && menu->sym->type != S_UNKNOWN) {
  260. menu_set_type(menu->sym->type);
  261. break;
  262. }
  263. }
  264. }
  265. /* set the type of the remaining choice values */
  266. for (menu = parent->list; menu; menu = menu->next) {
  267. current_entry = menu;
  268. if (menu->sym && menu->sym->type == S_UNKNOWN)
  269. menu_set_type(sym->type);
  270. }
  271. parentdep = expr_alloc_symbol(sym);
  272. } else if (parent->prompt)
  273. parentdep = parent->prompt->visible.expr;
  274. else
  275. parentdep = parent->dep;
  276. for (menu = parent->list; menu; menu = menu->next) {
  277. basedep = expr_transform(menu->dep);
  278. basedep = expr_alloc_and(expr_copy(parentdep), basedep);
  279. basedep = expr_eliminate_dups(basedep);
  280. menu->dep = basedep;
  281. if (menu->sym)
  282. prop = menu->sym->prop;
  283. else
  284. prop = menu->prompt;
  285. for (; prop; prop = prop->next) {
  286. if (prop->menu != menu)
  287. continue;
  288. dep = expr_transform(prop->visible.expr);
  289. dep = expr_alloc_and(expr_copy(basedep), dep);
  290. dep = expr_eliminate_dups(dep);
  291. if (menu->sym && menu->sym->type != S_TRISTATE)
  292. dep = expr_trans_bool(dep);
  293. prop->visible.expr = dep;
  294. if (prop->type == P_SELECT) {
  295. struct symbol *es = prop_get_symbol(prop);
  296. es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
  297. expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
  298. }
  299. }
  300. }
  301. for (menu = parent->list; menu; menu = menu->next)
  302. menu_finalize(menu);
  303. } else if (sym) {
  304. basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
  305. basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
  306. basedep = expr_eliminate_dups(expr_transform(basedep));
  307. last_menu = NULL;
  308. for (menu = parent->next; menu; menu = menu->next) {
  309. dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
  310. if (!expr_contains_symbol(dep, sym))
  311. break;
  312. if (expr_depends_symbol(dep, sym))
  313. goto next;
  314. dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
  315. dep = expr_eliminate_dups(expr_transform(dep));
  316. dep2 = expr_copy(basedep);
  317. expr_eliminate_eq(&dep, &dep2);
  318. expr_free(dep);
  319. if (!expr_is_yes(dep2)) {
  320. expr_free(dep2);
  321. break;
  322. }
  323. expr_free(dep2);
  324. next:
  325. menu_finalize(menu);
  326. menu->parent = parent;
  327. last_menu = menu;
  328. }
  329. if (last_menu) {
  330. parent->list = parent->next;
  331. parent->next = last_menu->next;
  332. last_menu->next = NULL;
  333. }
  334. sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
  335. }
  336. for (menu = parent->list; menu; menu = menu->next) {
  337. if (sym && sym_is_choice(sym) &&
  338. menu->sym && !sym_is_choice_value(menu->sym)) {
  339. current_entry = menu;
  340. menu->sym->flags |= SYMBOL_CHOICEVAL;
  341. if (!menu->prompt)
  342. menu_warn(menu, "choice value must have a prompt");
  343. for (prop = menu->sym->prop; prop; prop = prop->next) {
  344. if (prop->type == P_DEFAULT)
  345. prop_warn(prop, "defaults for choice "
  346. "values not supported");
  347. if (prop->menu == menu)
  348. continue;
  349. if (prop->type == P_PROMPT &&
  350. prop->menu->parent->sym != sym)
  351. prop_warn(prop, "choice value used outside its choice group");
  352. }
  353. /* Non-tristate choice values of tristate choices must
  354. * depend on the choice being set to Y. The choice
  355. * values' dependencies were propagated to their
  356. * properties above, so the change here must be re-
  357. * propagated.
  358. */
  359. if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
  360. basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
  361. menu->dep = expr_alloc_and(basedep, menu->dep);
  362. for (prop = menu->sym->prop; prop; prop = prop->next) {
  363. if (prop->menu != menu)
  364. continue;
  365. prop->visible.expr = expr_alloc_and(expr_copy(basedep),
  366. prop->visible.expr);
  367. }
  368. }
  369. menu_add_symbol(P_CHOICE, sym, NULL);
  370. prop = sym_get_choice_prop(sym);
  371. for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
  372. ;
  373. *ep = expr_alloc_one(E_LIST, NULL);
  374. (*ep)->right.sym = menu->sym;
  375. }
  376. if (menu->list && (!menu->prompt || !menu->prompt->text)) {
  377. for (last_menu = menu->list; ; last_menu = last_menu->next) {
  378. last_menu->parent = parent;
  379. if (!last_menu->next)
  380. break;
  381. }
  382. last_menu->next = menu->next;
  383. menu->next = menu->list;
  384. menu->list = NULL;
  385. }
  386. }
  387. if (sym && !(sym->flags & SYMBOL_WARNED)) {
  388. if (sym->type == S_UNKNOWN)
  389. menu_warn(parent, "config symbol defined without type");
  390. if (sym_is_choice(sym) && !parent->prompt)
  391. menu_warn(parent, "choice must have a prompt");
  392. /* Check properties connected to this symbol */
  393. sym_check_prop(sym);
  394. sym->flags |= SYMBOL_WARNED;
  395. }
  396. if (sym && !sym_is_optional(sym) && parent->prompt) {
  397. sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
  398. expr_alloc_and(parent->prompt->visible.expr,
  399. expr_alloc_symbol(&symbol_mod)));
  400. }
  401. }
  402. bool menu_has_prompt(struct menu *menu)
  403. {
  404. if (!menu->prompt)
  405. return false;
  406. return true;
  407. }
  408. /*
  409. * Determine if a menu is empty.
  410. * A menu is considered empty if it contains no or only
  411. * invisible entries.
  412. */
  413. bool menu_is_empty(struct menu *menu)
  414. {
  415. struct menu *child;
  416. for (child = menu->list; child; child = child->next) {
  417. if (menu_is_visible(child))
  418. return(false);
  419. }
  420. return(true);
  421. }
  422. bool menu_is_visible(struct menu *menu)
  423. {
  424. struct menu *child;
  425. struct symbol *sym;
  426. tristate visible;
  427. if (!menu->prompt)
  428. return false;
  429. if (menu->visibility) {
  430. if (expr_calc_value(menu->visibility) == no)
  431. return false;
  432. }
  433. sym = menu->sym;
  434. if (sym) {
  435. sym_calc_value(sym);
  436. visible = menu->prompt->visible.tri;
  437. } else
  438. visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
  439. if (visible != no)
  440. return true;
  441. if (!sym || sym_get_tristate_value(menu->sym) == no)
  442. return false;
  443. for (child = menu->list; child; child = child->next) {
  444. if (menu_is_visible(child)) {
  445. if (sym)
  446. sym->flags |= SYMBOL_DEF_USER;
  447. return true;
  448. }
  449. }
  450. return false;
  451. }
  452. const char *menu_get_prompt(struct menu *menu)
  453. {
  454. if (menu->prompt)
  455. return menu->prompt->text;
  456. else if (menu->sym)
  457. return menu->sym->name;
  458. return NULL;
  459. }
  460. struct menu *menu_get_root_menu(struct menu *menu)
  461. {
  462. return &rootmenu;
  463. }
  464. struct menu *menu_get_parent_menu(struct menu *menu)
  465. {
  466. enum prop_type type;
  467. for (; menu != &rootmenu; menu = menu->parent) {
  468. type = menu->prompt ? menu->prompt->type : 0;
  469. if (type == P_MENU)
  470. break;
  471. }
  472. return menu;
  473. }
  474. bool menu_has_help(struct menu *menu)
  475. {
  476. return menu->help != NULL;
  477. }
  478. const char *menu_get_help(struct menu *menu)
  479. {
  480. if (menu->help)
  481. return menu->help;
  482. else
  483. return "";
  484. }
  485. static void get_prompt_str(struct gstr *r, struct property *prop,
  486. struct list_head *head)
  487. {
  488. int i, j;
  489. struct menu *submenu[8], *menu, *location = NULL;
  490. struct jump_key *jump = NULL;
  491. str_printf(r, _("Prompt: %s\n"), _(prop->text));
  492. menu = prop->menu->parent;
  493. for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
  494. bool accessible = menu_is_visible(menu);
  495. submenu[i++] = menu;
  496. if (location == NULL && accessible)
  497. location = menu;
  498. }
  499. if (head && location) {
  500. jump = xmalloc(sizeof(struct jump_key));
  501. if (menu_is_visible(prop->menu)) {
  502. /*
  503. * There is not enough room to put the hint at the
  504. * beginning of the "Prompt" line. Put the hint on the
  505. * last "Location" line even when it would belong on
  506. * the former.
  507. */
  508. jump->target = prop->menu;
  509. } else
  510. jump->target = location;
  511. if (list_empty(head))
  512. jump->index = 0;
  513. else
  514. jump->index = list_entry(head->prev, struct jump_key,
  515. entries)->index + 1;
  516. list_add_tail(&jump->entries, head);
  517. }
  518. if (i > 0) {
  519. str_printf(r, _(" Location:\n"));
  520. for (j = 4; --i >= 0; j += 2) {
  521. menu = submenu[i];
  522. if (jump && menu == location)
  523. jump->offset = strlen(r->s);
  524. str_printf(r, "%*c-> %s", j, ' ',
  525. _(menu_get_prompt(menu)));
  526. if (menu->sym) {
  527. str_printf(r, " (%s [=%s])", menu->sym->name ?
  528. menu->sym->name : _("<choice>"),
  529. sym_get_string_value(menu->sym));
  530. }
  531. str_append(r, "\n");
  532. }
  533. }
  534. }
  535. /*
  536. * get property of type P_SYMBOL
  537. */
  538. static struct property *get_symbol_prop(struct symbol *sym)
  539. {
  540. struct property *prop = NULL;
  541. for_all_properties(sym, prop, P_SYMBOL)
  542. break;
  543. return prop;
  544. }
  545. /*
  546. * head is optional and may be NULL
  547. */
  548. static void get_symbol_str(struct gstr *r, struct symbol *sym,
  549. struct list_head *head)
  550. {
  551. bool hit;
  552. struct property *prop;
  553. if (sym && sym->name) {
  554. str_printf(r, "Symbol: %s [=%s]\n", sym->name,
  555. sym_get_string_value(sym));
  556. str_printf(r, "Type : %s\n", sym_type_name(sym->type));
  557. if (sym->type == S_INT || sym->type == S_HEX) {
  558. prop = sym_get_range_prop(sym);
  559. if (prop) {
  560. str_printf(r, "Range : ");
  561. expr_gstr_print(prop->expr, r);
  562. str_append(r, "\n");
  563. }
  564. }
  565. }
  566. for_all_prompts(sym, prop)
  567. get_prompt_str(r, prop, head);
  568. prop = get_symbol_prop(sym);
  569. if (prop) {
  570. str_printf(r, _(" Defined at %s:%d\n"), prop->menu->file->name,
  571. prop->menu->lineno);
  572. if (!expr_is_yes(prop->visible.expr)) {
  573. str_append(r, _(" Depends on: "));
  574. expr_gstr_print(prop->visible.expr, r);
  575. str_append(r, "\n");
  576. }
  577. }
  578. hit = false;
  579. for_all_properties(sym, prop, P_SELECT) {
  580. if (!hit) {
  581. str_append(r, " Selects: ");
  582. hit = true;
  583. } else
  584. str_printf(r, " && ");
  585. expr_gstr_print(prop->expr, r);
  586. }
  587. if (hit)
  588. str_append(r, "\n");
  589. if (sym->rev_dep.expr) {
  590. str_append(r, _(" Selected by: "));
  591. expr_gstr_print(sym->rev_dep.expr, r);
  592. str_append(r, "\n");
  593. }
  594. str_append(r, "\n\n");
  595. }
  596. struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
  597. {
  598. struct symbol *sym;
  599. struct gstr res = str_new();
  600. int i;
  601. for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
  602. get_symbol_str(&res, sym, head);
  603. if (!i)
  604. str_append(&res, _("No matches found.\n"));
  605. return res;
  606. }
  607. void menu_get_ext_help(struct menu *menu, struct gstr *help)
  608. {
  609. struct symbol *sym = menu->sym;
  610. const char *help_text = nohelp_text;
  611. if (menu_has_help(menu)) {
  612. if (sym->name)
  613. str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
  614. help_text = menu_get_help(menu);
  615. }
  616. str_printf(help, "%s\n", _(help_text));
  617. if (sym)
  618. get_symbol_str(help, sym, NULL);
  619. }