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 case T_OPT_ALLNOCONFIG_Y: 221 current_entry->sym->flags |= SYMBOL_ALLNOCONFIG_Y; 222 break; 223 } 224 } 225 226 static int menu_validate_number(struct symbol *sym, struct symbol *sym2) 227 { 228 return sym2->type == S_INT || sym2->type == S_HEX || 229 (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name)); 230 } 231 232 static void sym_check_prop(struct symbol *sym) 233 { 234 struct property *prop; 235 struct symbol *sym2; 236 for (prop = sym->prop; prop; prop = prop->next) { 237 switch (prop->type) { 238 case P_DEFAULT: 239 if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) && 240 prop->expr->type != E_SYMBOL) 241 prop_warn(prop, 242 "default for config symbol '%s'" 243 " must be a single symbol", sym->name); 244 if (prop->expr->type != E_SYMBOL) 245 break; 246 sym2 = prop_get_symbol(prop); 247 if (sym->type == S_HEX || sym->type == S_INT) { 248 if (!menu_validate_number(sym, sym2)) 249 prop_warn(prop, 250 "'%s': number is invalid", 251 sym->name); 252 } 253 break; 254 case P_SELECT: 255 sym2 = prop_get_symbol(prop); 256 if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE) 257 prop_warn(prop, 258 "config symbol '%s' uses select, but is " 259 "not boolean or tristate", sym->name); 260 else if (sym2->type != S_UNKNOWN && 261 sym2->type != S_BOOLEAN && 262 sym2->type != S_TRISTATE) 263 prop_warn(prop, 264 "'%s' has wrong type. 'select' only " 265 "accept arguments of boolean and " 266 "tristate type", sym2->name); 267 break; 268 case P_RANGE: 269 if (sym->type != S_INT && sym->type != S_HEX) 270 prop_warn(prop, "range is only allowed " 271 "for int or hex symbols"); 272 if (!menu_validate_number(sym, prop->expr->left.sym) || 273 !menu_validate_number(sym, prop->expr->right.sym)) 274 prop_warn(prop, "range is invalid"); 275 break; 276 default: 277 ; 278 } 279 } 280 } 281 282 void menu_finalize(struct menu *parent) 283 { 284 struct menu *menu, *last_menu; 285 struct symbol *sym; 286 struct property *prop; 287 struct expr *parentdep, *basedep, *dep, *dep2, **ep; 288 289 sym = parent->sym; 290 if (parent->list) { 291 if (sym && sym_is_choice(sym)) { 292 if (sym->type == S_UNKNOWN) { 293 /* find the first choice value to find out choice type */ 294 current_entry = parent; 295 for (menu = parent->list; menu; menu = menu->next) { 296 if (menu->sym && menu->sym->type != S_UNKNOWN) { 297 menu_set_type(menu->sym->type); 298 break; 299 } 300 } 301 } 302 /* set the type of the remaining choice values */ 303 for (menu = parent->list; menu; menu = menu->next) { 304 current_entry = menu; 305 if (menu->sym && menu->sym->type == S_UNKNOWN) 306 menu_set_type(sym->type); 307 } 308 parentdep = expr_alloc_symbol(sym); 309 } else if (parent->prompt) 310 parentdep = parent->prompt->visible.expr; 311 else 312 parentdep = parent->dep; 313 314 for (menu = parent->list; menu; menu = menu->next) { 315 basedep = expr_transform(menu->dep); 316 basedep = expr_alloc_and(expr_copy(parentdep), basedep); 317 basedep = expr_eliminate_dups(basedep); 318 menu->dep = basedep; 319 if (menu->sym) 320 prop = menu->sym->prop; 321 else 322 prop = menu->prompt; 323 for (; prop; prop = prop->next) { 324 if (prop->menu != menu) 325 continue; 326 dep = expr_transform(prop->visible.expr); 327 dep = expr_alloc_and(expr_copy(basedep), dep); 328 dep = expr_eliminate_dups(dep); 329 if (menu->sym && menu->sym->type != S_TRISTATE) 330 dep = expr_trans_bool(dep); 331 prop->visible.expr = dep; 332 if (prop->type == P_SELECT) { 333 struct symbol *es = prop_get_symbol(prop); 334 es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr, 335 expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep))); 336 } 337 } 338 } 339 for (menu = parent->list; menu; menu = menu->next) 340 menu_finalize(menu); 341 } else if (sym) { 342 basedep = parent->prompt ? parent->prompt->visible.expr : NULL; 343 basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no); 344 basedep = expr_eliminate_dups(expr_transform(basedep)); 345 last_menu = NULL; 346 for (menu = parent->next; menu; menu = menu->next) { 347 dep = menu->prompt ? menu->prompt->visible.expr : menu->dep; 348 if (!expr_contains_symbol(dep, sym)) 349 break; 350 if (expr_depends_symbol(dep, sym)) 351 goto next; 352 dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no); 353 dep = expr_eliminate_dups(expr_transform(dep)); 354 dep2 = expr_copy(basedep); 355 expr_eliminate_eq(&dep, &dep2); 356 expr_free(dep); 357 if (!expr_is_yes(dep2)) { 358 expr_free(dep2); 359 break; 360 } 361 expr_free(dep2); 362 next: 363 menu_finalize(menu); 364 menu->parent = parent; 365 last_menu = menu; 366 } 367 if (last_menu) { 368 parent->list = parent->next; 369 parent->next = last_menu->next; 370 last_menu->next = NULL; 371 } 372 373 sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep); 374 } 375 for (menu = parent->list; menu; menu = menu->next) { 376 if (sym && sym_is_choice(sym) && 377 menu->sym && !sym_is_choice_value(menu->sym)) { 378 current_entry = menu; 379 menu->sym->flags |= SYMBOL_CHOICEVAL; 380 if (!menu->prompt) 381 menu_warn(menu, "choice value must have a prompt"); 382 for (prop = menu->sym->prop; prop; prop = prop->next) { 383 if (prop->type == P_DEFAULT) 384 prop_warn(prop, "defaults for choice " 385 "values not supported"); 386 if (prop->menu == menu) 387 continue; 388 if (prop->type == P_PROMPT && 389 prop->menu->parent->sym != sym) 390 prop_warn(prop, "choice value used outside its choice group"); 391 } 392 /* Non-tristate choice values of tristate choices must 393 * depend on the choice being set to Y. The choice 394 * values' dependencies were propagated to their 395 * properties above, so the change here must be re- 396 * propagated. 397 */ 398 if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) { 399 basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes); 400 menu->dep = expr_alloc_and(basedep, menu->dep); 401 for (prop = menu->sym->prop; prop; prop = prop->next) { 402 if (prop->menu != menu) 403 continue; 404 prop->visible.expr = expr_alloc_and(expr_copy(basedep), 405 prop->visible.expr); 406 } 407 } 408 menu_add_symbol(P_CHOICE, sym, NULL); 409 prop = sym_get_choice_prop(sym); 410 for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr) 411 ; 412 *ep = expr_alloc_one(E_LIST, NULL); 413 (*ep)->right.sym = menu->sym; 414 } 415 if (menu->list && (!menu->prompt || !menu->prompt->text)) { 416 for (last_menu = menu->list; ; last_menu = last_menu->next) { 417 last_menu->parent = parent; 418 if (!last_menu->next) 419 break; 420 } 421 last_menu->next = menu->next; 422 menu->next = menu->list; 423 menu->list = NULL; 424 } 425 } 426 427 if (sym && !(sym->flags & SYMBOL_WARNED)) { 428 if (sym->type == S_UNKNOWN) 429 menu_warn(parent, "config symbol defined without type"); 430 431 if (sym_is_choice(sym) && !parent->prompt) 432 menu_warn(parent, "choice must have a prompt"); 433 434 /* Check properties connected to this symbol */ 435 sym_check_prop(sym); 436 sym->flags |= SYMBOL_WARNED; 437 } 438 439 if (sym && !sym_is_optional(sym) && parent->prompt) { 440 sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr, 441 expr_alloc_and(parent->prompt->visible.expr, 442 expr_alloc_symbol(&symbol_mod))); 443 } 444 } 445 446 bool menu_has_prompt(struct menu *menu) 447 { 448 if (!menu->prompt) 449 return false; 450 return true; 451 } 452 453 /* 454 * Determine if a menu is empty. 455 * A menu is considered empty if it contains no or only 456 * invisible entries. 457 */ 458 bool menu_is_empty(struct menu *menu) 459 { 460 struct menu *child; 461 462 for (child = menu->list; child; child = child->next) { 463 if (menu_is_visible(child)) 464 return(false); 465 } 466 return(true); 467 } 468 469 bool menu_is_visible(struct menu *menu) 470 { 471 struct menu *child; 472 struct symbol *sym; 473 tristate visible; 474 475 if (!menu->prompt) 476 return false; 477 478 if (menu->visibility) { 479 if (expr_calc_value(menu->visibility) == no) 480 return no; 481 } 482 483 sym = menu->sym; 484 if (sym) { 485 sym_calc_value(sym); 486 visible = menu->prompt->visible.tri; 487 } else 488 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr); 489 490 if (visible != no) 491 return true; 492 493 if (!sym || sym_get_tristate_value(menu->sym) == no) 494 return false; 495 496 for (child = menu->list; child; child = child->next) { 497 if (menu_is_visible(child)) { 498 if (sym) 499 sym->flags |= SYMBOL_DEF_USER; 500 return true; 501 } 502 } 503 504 return false; 505 } 506 507 const char *menu_get_prompt(struct menu *menu) 508 { 509 if (menu->prompt) 510 return menu->prompt->text; 511 else if (menu->sym) 512 return menu->sym->name; 513 return NULL; 514 } 515 516 struct menu *menu_get_root_menu(struct menu *menu) 517 { 518 return &rootmenu; 519 } 520 521 struct menu *menu_get_parent_menu(struct menu *menu) 522 { 523 enum prop_type type; 524 525 for (; menu != &rootmenu; menu = menu->parent) { 526 type = menu->prompt ? menu->prompt->type : 0; 527 if (type == P_MENU) 528 break; 529 } 530 return menu; 531 } 532 533 bool menu_has_help(struct menu *menu) 534 { 535 return menu->help != NULL; 536 } 537 538 const char *menu_get_help(struct menu *menu) 539 { 540 if (menu->help) 541 return menu->help; 542 else 543 return ""; 544 } 545 546 static void get_prompt_str(struct gstr *r, struct property *prop, 547 struct list_head *head) 548 { 549 int i, j; 550 struct menu *submenu[8], *menu, *location = NULL; 551 struct jump_key *jump = NULL; 552 553 str_printf(r, _("Prompt: %s\n"), _(prop->text)); 554 menu = prop->menu->parent; 555 for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) { 556 bool accessible = menu_is_visible(menu); 557 558 submenu[i++] = menu; 559 if (location == NULL && accessible) 560 location = menu; 561 } 562 if (head && location) { 563 jump = xmalloc(sizeof(struct jump_key)); 564 565 if (menu_is_visible(prop->menu)) { 566 /* 567 * There is not enough room to put the hint at the 568 * beginning of the "Prompt" line. Put the hint on the 569 * last "Location" line even when it would belong on 570 * the former. 571 */ 572 jump->target = prop->menu; 573 } else 574 jump->target = location; 575 576 if (list_empty(head)) 577 jump->index = 0; 578 else 579 jump->index = list_entry(head->prev, struct jump_key, 580 entries)->index + 1; 581 582 list_add_tail(&jump->entries, head); 583 } 584 585 if (i > 0) { 586 str_printf(r, _(" Location:\n")); 587 for (j = 4; --i >= 0; j += 2) { 588 menu = submenu[i]; 589 if (jump && menu == location) 590 jump->offset = strlen(r->s); 591 str_printf(r, "%*c-> %s", j, ' ', 592 _(menu_get_prompt(menu))); 593 if (menu->sym) { 594 str_printf(r, " (%s [=%s])", menu->sym->name ? 595 menu->sym->name : _("<choice>"), 596 sym_get_string_value(menu->sym)); 597 } 598 str_append(r, "\n"); 599 } 600 } 601 } 602 603 /* 604 * get property of type P_SYMBOL 605 */ 606 static struct property *get_symbol_prop(struct symbol *sym) 607 { 608 struct property *prop = NULL; 609 610 for_all_properties(sym, prop, P_SYMBOL) 611 break; 612 return prop; 613 } 614 615 /* 616 * head is optional and may be NULL 617 */ 618 void get_symbol_str(struct gstr *r, struct symbol *sym, 619 struct list_head *head) 620 { 621 bool hit; 622 struct property *prop; 623 624 if (sym && sym->name) { 625 str_printf(r, "Symbol: %s [=%s]\n", sym->name, 626 sym_get_string_value(sym)); 627 str_printf(r, "Type : %s\n", sym_type_name(sym->type)); 628 if (sym->type == S_INT || sym->type == S_HEX) { 629 prop = sym_get_range_prop(sym); 630 if (prop) { 631 str_printf(r, "Range : "); 632 expr_gstr_print(prop->expr, r); 633 str_append(r, "\n"); 634 } 635 } 636 } 637 for_all_prompts(sym, prop) 638 get_prompt_str(r, prop, head); 639 640 prop = get_symbol_prop(sym); 641 if (prop) { 642 str_printf(r, _(" Defined at %s:%d\n"), prop->menu->file->name, 643 prop->menu->lineno); 644 if (!expr_is_yes(prop->visible.expr)) { 645 str_append(r, _(" Depends on: ")); 646 expr_gstr_print(prop->visible.expr, r); 647 str_append(r, "\n"); 648 } 649 } 650 651 hit = false; 652 for_all_properties(sym, prop, P_SELECT) { 653 if (!hit) { 654 str_append(r, " Selects: "); 655 hit = true; 656 } else 657 str_printf(r, " && "); 658 expr_gstr_print(prop->expr, r); 659 } 660 if (hit) 661 str_append(r, "\n"); 662 if (sym->rev_dep.expr) { 663 str_append(r, _(" Selected by: ")); 664 expr_gstr_print(sym->rev_dep.expr, r); 665 str_append(r, "\n"); 666 } 667 str_append(r, "\n\n"); 668 } 669 670 struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head) 671 { 672 struct symbol *sym; 673 struct gstr res = str_new(); 674 int i; 675 676 for (i = 0; sym_arr && (sym = sym_arr[i]); i++) 677 get_symbol_str(&res, sym, head); 678 if (!i) 679 str_append(&res, _("No matches found.\n")); 680 return res; 681 } 682 683 684 void menu_get_ext_help(struct menu *menu, struct gstr *help) 685 { 686 struct symbol *sym = menu->sym; 687 const char *help_text = nohelp_text; 688 689 if (menu_has_help(menu)) { 690 if (sym->name) 691 str_printf(help, "%s%s:\n\n", CONFIG_, sym->name); 692 help_text = menu_get_help(menu); 693 } 694 str_printf(help, "%s\n", _(help_text)); 695 if (sym) 696 get_symbol_str(help, sym, NULL); 697 } 698