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