extra/config/menu.c

   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 = &current_entry->list;
  73         return current_menu = current_entry;
  74 }
  75
  76 void menu_end_menu(void)
  77 {
  78         last_entry_ptr = &current_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, "type of '%s' redefined from '%s' to '%s'",
 123             sym->name ? sym->name : "<choice>",
 124             sym_type_name(sym->type), sym_type_name(type));
 125 }
 126
 127 struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
 128 {
 129         struct property *prop = prop_alloc(type, current_entry->sym);
 130
 131         prop->menu = current_entry;
 132         prop->expr = expr;
 133         prop->visible.expr = menu_check_dep(dep);
 134
 135         if (prompt) {
 136                 if (isspace(*prompt)) {
 137                         prop_warn(prop, "leading whitespace ignored");
 138                         while (isspace(*prompt))
 139                                 prompt++;
 140                 }
 141                 if (current_entry->prompt && current_entry != &rootmenu)
 142                         prop_warn(prop, "prompt redefined");
 143
 144                 /* Apply all upper menus' visibilities to actual prompts. */
 145                 if(type == P_PROMPT) {
 146                         struct menu *menu = current_entry;
 147
 148                         while ((menu = menu->parent) != NULL) {
 149                                 struct expr *dup_expr;
 150
 151                                 if (!menu->visibility)
 152                                         continue;
 153                                 /*
 154                                  * Do not add a reference to the
 155                                  * menu's visibility expression but
 156                                  * use a copy of it.  Otherwise the
 157                                  * expression reduction functions
 158                                  * will modify expressions that have
 159                                  * multiple references which can
 160                                  * cause unwanted side effects.
 161                                  */
 162                                 dup_expr = expr_copy(menu->visibility);
 163
 164                                 prop->visible.expr
 165                                         = expr_alloc_and(prop->visible.expr,
 166                                                          dup_expr);
 167                         }
 168                 }
 169
 170                 current_entry->prompt = prop;
 171         }
 172         prop->text = prompt;
 173
 174         return prop;
 175 }
 176
 177 struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
 178 {
 179         return menu_add_prop(type, prompt, NULL, dep);
 180 }
 181
 182 void menu_add_visibility(struct expr *expr)
 183 {
 184         current_entry->visibility = expr_alloc_and(current_entry->visibility,
 185             expr);
 186 }
 187
 188 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
 189 {
 190         menu_add_prop(type, NULL, expr, dep);
 191 }
 192
 193 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
 194 {
 195         menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
 196 }
 197
 198 void menu_add_option(int token, char *arg)
 199 {
 200         struct property *prop;
 201
 202         switch (token) {
 203         case T_OPT_MODULES:
 204                 prop = prop_alloc(P_DEFAULT, modules_sym);
 205                 prop->expr = expr_alloc_symbol(current_entry->sym);
 206                 break;
 207         case T_OPT_DEFCONFIG_LIST:
 208                 if (!sym_defconfig_list)
 209                         sym_defconfig_list = current_entry->sym;
 210                 else if (sym_defconfig_list != current_entry->sym)
 211                         zconf_error("trying to redefine defconfig symbol");
 212                 break;
 213         case T_OPT_ENV:
 214                 prop_add_env(arg);
 215                 break;
 216         }
 217 }
 218
 219 static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
 220 {
 221         return sym2->type == S_INT || sym2->type == S_HEX ||
 222                (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
 223 }
 224
 225 static void sym_check_prop(struct symbol *sym)
 226 {
 227         struct property *prop;
 228         struct symbol *sym2;
 229         for (prop = sym->prop; prop; prop = prop->next) {
 230                 switch (prop->type) {
 231                 case P_DEFAULT:
 232                         if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
 233                             prop->expr->type != E_SYMBOL)
 234                                 prop_warn(prop,
 235                                     "default for config symbol '%s'"
 236                                     " must be a single symbol", sym->name);
 237                         if (prop->expr->type != E_SYMBOL)
 238                                 break;
 239                         sym2 = prop_get_symbol(prop);
 240                         if (sym->type == S_HEX || sym->type == S_INT) {
 241                                 if (!menu_validate_number(sym, sym2))
 242                                         prop_warn(prop,
 243                                             "'%s': number is invalid",
 244                                             sym->name);
 245                         }
 246                         break;
 247                 case P_SELECT:
 248                         sym2 = prop_get_symbol(prop);
 249                         if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
 250                                 prop_warn(prop,
 251                                     "config symbol '%s' uses select, but is "
 252                                     "not boolean or tristate", sym->name);
 253                         else if (sym2->type != S_UNKNOWN &&
 254                                  sym2->type != S_BOOLEAN &&
 255                                  sym2->type != S_TRISTATE)
 256                                 prop_warn(prop,
 257                                     "'%s' has wrong type. 'select' only "
 258                                     "accept arguments of boolean and "
 259                                     "tristate type", sym2->name);
 260                         break;
 261                 case P_RANGE:
 262                         if (sym->type != S_INT && sym->type != S_HEX)
 263                                 prop_warn(prop, "range is only allowed "
 264                                                 "for int or hex symbols");
 265                         if (!menu_validate_number(sym, prop->expr->left.sym) ||
 266                             !menu_validate_number(sym, prop->expr->right.sym))
 267                                 prop_warn(prop, "range is invalid");
 268                         break;
 269                 default:
 270                         ;
 271                 }
 272         }
 273 }
 274
 275 void menu_finalize(struct menu *parent)
 276 {
 277         struct menu *menu, *last_menu;
 278         struct symbol *sym;
 279         struct property *prop;
 280         struct expr *parentdep, *basedep, *dep, *dep2, **ep;
 281
 282         sym = parent->sym;
 283         if (parent->list) {
 284                 if (sym && sym_is_choice(sym)) {
 285                         if (sym->type == S_UNKNOWN) {
 286                                 /* find the first choice value to find out choice type */
 287                                 current_entry = parent;
 288                                 for (menu = parent->list; menu; menu = menu->next) {
 289                                         if (menu->sym && menu->sym->type != S_UNKNOWN) {
 290                                                 menu_set_type(menu->sym->type);
 291                                                 break;
 292                                         }
 293                                 }
 294                         }
 295                         /* set the type of the remaining choice values */
 296                         for (menu = parent->list; menu; menu = menu->next) {
 297                                 current_entry = menu;
 298                                 if (menu->sym && menu->sym->type == S_UNKNOWN)
 299                                         menu_set_type(sym->type);
 300                         }
 301                         parentdep = expr_alloc_symbol(sym);
 302                 } else if (parent->prompt)
 303                         parentdep = parent->prompt->visible.expr;
 304                 else
 305                         parentdep = parent->dep;
 306
 307                 for (menu = parent->list; menu; menu = menu->next) {
 308                         basedep = expr_transform(menu->dep);
 309                         basedep = expr_alloc_and(expr_copy(parentdep), basedep);
 310                         basedep = expr_eliminate_dups(basedep);
 311                         menu->dep = basedep;
 312                         if (menu->sym)
 313                                 prop = menu->sym->prop;
 314                         else
 315                                 prop = menu->prompt;
 316                         for (; prop; prop = prop->next) {
 317                                 if (prop->menu != menu)
 318                                         continue;
 319                                 dep = expr_transform(prop->visible.expr);
 320                                 dep = expr_alloc_and(expr_copy(basedep), dep);
 321                                 dep = expr_eliminate_dups(dep);
 322                                 if (menu->sym && menu->sym->type != S_TRISTATE)
 323                                         dep = expr_trans_bool(dep);
 324                                 prop->visible.expr = dep;
 325                                 if (prop->type == P_SELECT) {
 326                                         struct symbol *es = prop_get_symbol(prop);
 327                                         es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
 328                                                         expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
 329                                 }
 330                         }
 331                 }
 332                 for (menu = parent->list; menu; menu = menu->next)
 333                         menu_finalize(menu);
 334         } else if (sym) {
 335                 basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
 336                 basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
 337                 basedep = expr_eliminate_dups(expr_transform(basedep));
 338                 last_menu = NULL;
 339                 for (menu = parent->next; menu; menu = menu->next) {
 340                         dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
 341                         if (!expr_contains_symbol(dep, sym))
 342                                 break;
 343                         if (expr_depends_symbol(dep, sym))
 344                                 goto next;
 345                         dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
 346                         dep = expr_eliminate_dups(expr_transform(dep));
 347                         dep2 = expr_copy(basedep);
 348                         expr_eliminate_eq(&dep, &dep2);
 349                         expr_free(dep);
 350                         if (!expr_is_yes(dep2)) {
 351                                 expr_free(dep2);
 352                                 break;
 353                         }
 354                         expr_free(dep2);
 355                 next:
 356                         menu_finalize(menu);
 357                         menu->parent = parent;
 358                         last_menu = menu;
 359                 }
 360                 if (last_menu) {
 361                         parent->list = parent->next;
 362                         parent->next = last_menu->next;
 363                         last_menu->next = NULL;
 364                 }
 365
 366                 sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
 367         }
 368         for (menu = parent->list; menu; menu = menu->next) {
 369                 if (sym && sym_is_choice(sym) &&
 370                     menu->sym && !sym_is_choice_value(menu->sym)) {
 371                         current_entry = menu;
 372                         menu->sym->flags |= SYMBOL_CHOICEVAL;
 373                         if (!menu->prompt)
 374                                 menu_warn(menu, "choice value must have a prompt");
 375                         for (prop = menu->sym->prop; prop; prop = prop->next) {
 376                                 if (prop->type == P_DEFAULT)
 377                                         prop_warn(prop, "defaults for choice "
 378                                                   "values not supported");
 379                                 if (prop->menu == menu)
 380                                         continue;
 381                                 if (prop->type == P_PROMPT &&
 382                                     prop->menu->parent->sym != sym)
 383                                         prop_warn(prop, "choice value used outside its choice group");
 384                         }
 385                         /* Non-tristate choice values of tristate choices must
 386                          * depend on the choice being set to Y. The choice
 387                          * values' dependencies were propagated to their
 388                          * properties above, so the change here must be re-
 389                          * propagated.
 390                          */
 391                         if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
 392                                 basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
 393                                 menu->dep = expr_alloc_and(basedep, menu->dep);
 394                                 for (prop = menu->sym->prop; prop; prop = prop->next) {
 395                                         if (prop->menu != menu)
 396                                                 continue;
 397                                         prop->visible.expr = expr_alloc_and(expr_copy(basedep),
 398                                                                             prop->visible.expr);
 399                                 }
 400                         }
 401                         menu_add_symbol(P_CHOICE, sym, NULL);
 402                         prop = sym_get_choice_prop(sym);
 403                         for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
 404                                 ;
 405                         *ep = expr_alloc_one(E_LIST, NULL);
 406                         (*ep)->right.sym = menu->sym;
 407                 }
 408                 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
 409                         for (last_menu = menu->list; ; last_menu = last_menu->next) {
 410                                 last_menu->parent = parent;
 411                                 if (!last_menu->next)
 412                                         break;
 413                         }
 414                         last_menu->next = menu->next;
 415                         menu->next = menu->list;
 416                         menu->list = NULL;
 417                 }
 418         }
 419
 420         if (sym && !(sym->flags & SYMBOL_WARNED)) {
 421                 if (sym->type == S_UNKNOWN)
 422                         menu_warn(parent, "config symbol defined without type");
 423
 424                 if (sym_is_choice(sym) && !parent->prompt)
 425                         menu_warn(parent, "choice must have a prompt");
 426
 427                 /* Check properties connected to this symbol */
 428                 sym_check_prop(sym);
 429                 sym->flags |= SYMBOL_WARNED;
 430         }
 431
 432         if (sym && !sym_is_optional(sym) && parent->prompt) {
 433                 sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
 434                                 expr_alloc_and(parent->prompt->visible.expr,
 435                                         expr_alloc_symbol(&symbol_mod)));
 436         }
 437 }
 438
 439 bool menu_has_prompt(struct menu *menu)
 440 {
 441         if (!menu->prompt)
 442                 return false;
 443         return true;
 444 }
 445
 446 /*
 447  * Determine if a menu is empty.
 448  * A menu is considered empty if it contains no or only
 449  * invisible entries.
 450  */
 451 bool menu_is_empty(struct menu *menu)
 452 {
 453         struct menu *child;
 454
 455         for (child = menu->list; child; child = child->next) {
 456                 if (menu_is_visible(child))
 457                         return(false);
 458         }
 459         return(true);
 460 }
 461
 462 bool menu_is_visible(struct menu *menu)
 463 {
 464         struct menu *child;
 465         struct symbol *sym;
 466         tristate visible;
 467
 468         if (!menu->prompt)
 469                 return false;
 470
 471         if (menu->visibility) {
 472                 if (expr_calc_value(menu->visibility) == no)
 473                         return no;
 474         }
 475
 476         sym = menu->sym;
 477         if (sym) {
 478                 sym_calc_value(sym);
 479                 visible = menu->prompt->visible.tri;
 480         } else
 481                 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
 482
 483         if (visible != no)
 484                 return true;
 485
 486         if (!sym || sym_get_tristate_value(menu->sym) == no)
 487                 return false;
 488
 489         for (child = menu->list; child; child = child->next) {
 490                 if (menu_is_visible(child)) {
 491                         if (sym)
 492                                 sym->flags |= SYMBOL_DEF_USER;
 493                         return true;
 494                 }
 495         }
 496
 497         return false;
 498 }
 499
 500 const char *menu_get_prompt(struct menu *menu)
 501 {
 502         if (menu->prompt)
 503                 return menu->prompt->text;
 504         else if (menu->sym)
 505                 return menu->sym->name;
 506         return NULL;
 507 }
 508
 509 struct menu *menu_get_root_menu(struct menu *menu)
 510 {
 511         return &rootmenu;
 512 }
 513
 514 struct menu *menu_get_parent_menu(struct menu *menu)
 515 {
 516         enum prop_type type;
 517
 518         for (; menu != &rootmenu; menu = menu->parent) {
 519                 type = menu->prompt ? menu->prompt->type : 0;
 520                 if (type == P_MENU)
 521                         break;
 522         }
 523         return menu;
 524 }
 525
 526 bool menu_has_help(struct menu *menu)
 527 {
 528         return menu->help != NULL;
 529 }
 530
 531 const char *menu_get_help(struct menu *menu)
 532 {
 533         if (menu->help)
 534                 return menu->help;
 535         else
 536                 return "";
 537 }
 538
 539 static void get_prompt_str(struct gstr *r, struct property *prop,
 540                            struct list_head *head)
 541 {
 542         int i, j;
 543         struct menu *submenu[8], *menu, *location = NULL;
 544         struct jump_key *jump;
 545
 546         str_printf(r, _("Prompt: %s\n"), _(prop->text));
 547         menu = prop->menu->parent;
 548         for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
 549                 bool accessible = menu_is_visible(menu);
 550
 551                 submenu[i++] = menu;
 552                 if (location == NULL && accessible)
 553                         location = menu;
 554         }
 555         if (head && location) {
 556                 jump = xmalloc(sizeof(struct jump_key));
 557
 558                 if (menu_is_visible(prop->menu)) {
 559                         /*
 560                          * There is not enough room to put the hint at the
 561                          * beginning of the "Prompt" line. Put the hint on the
 562                          * last "Location" line even when it would belong on
 563                          * the former.
 564                          */
 565                         jump->target = prop->menu;
 566                 } else
 567                         jump->target = location;
 568
 569                 if (list_empty(head))
 570                         jump->index = 0;
 571                 else
 572                         jump->index = list_entry(head->prev, struct jump_key,
 573                                                  entries)->index + 1;
 574
 575                 list_add_tail(&jump->entries, head);
 576         }
 577
 578         if (i > 0) {
 579                 str_printf(r, _("  Location:\n"));
 580                 for (j = 4; --i >= 0; j += 2) {
 581                         menu = submenu[i];
 582                         if (head && location && menu == location)
 583                                 jump->offset = r->len - 1;
 584                         str_printf(r, "%*c-> %s", j, ' ',
 585                                    _(menu_get_prompt(menu)));
 586                         if (menu->sym) {
 587                                 str_printf(r, " (%s [=%s])", menu->sym->name ?
 588                                         menu->sym->name : _("<choice>"),
 589                                         sym_get_string_value(menu->sym));
 590                         }
 591                         str_append(r, "\n");
 592                 }
 593         }
 594 }
 595
 596 /*
 597  * get peoperty of type P_SYMBOL
 598  */
 599 static struct property *get_symbol_prop(struct symbol *sym)
 600 {
 601         struct property *prop = NULL;
 602
 603         for_all_properties(sym, prop, P_SYMBOL)
 604                 break;
 605         return prop;
 606 }
 607
 608 /*
 609  * head is optional and may be NULL
 610  */
 611 void get_symbol_str(struct gstr *r, struct symbol *sym,
 612                     struct list_head *head)
 613 {
 614         bool hit;
 615         struct property *prop;
 616
 617         if (sym && sym->name) {
 618                 str_printf(r, "Symbol: %s [=%s]\n", sym->name,
 619                            sym_get_string_value(sym));
 620                 str_printf(r, "Type  : %s\n", sym_type_name(sym->type));
 621                 if (sym->type == S_INT || sym->type == S_HEX) {
 622                         prop = sym_get_range_prop(sym);
 623                         if (prop) {
 624                                 str_printf(r, "Range : ");
 625                                 expr_gstr_print(prop->expr, r);
 626                                 str_append(r, "\n");
 627                         }
 628                 }
 629         }
 630         for_all_prompts(sym, prop)
 631                 get_prompt_str(r, prop, head);
 632
 633         prop = get_symbol_prop(sym);
 634         if (prop) {
 635                 str_printf(r, _("  Defined at %s:%d\n"), prop->menu->file->name,
 636                         prop->menu->lineno);
 637                 if (!expr_is_yes(prop->visible.expr)) {
 638                         str_append(r, _("  Depends on: "));
 639                         expr_gstr_print(prop->visible.expr, r);
 640                         str_append(r, "\n");
 641                 }
 642         }
 643
 644         hit = false;
 645         for_all_properties(sym, prop, P_SELECT) {
 646                 if (!hit) {
 647                         str_append(r, "  Selects: ");
 648                         hit = true;
 649                 } else
 650                         str_printf(r, " && ");
 651                 expr_gstr_print(prop->expr, r);
 652         }
 653         if (hit)
 654                 str_append(r, "\n");
 655         if (sym->rev_dep.expr) {
 656                 str_append(r, _("  Selected by: "));
 657                 expr_gstr_print(sym->rev_dep.expr, r);
 658                 str_append(r, "\n");
 659         }
 660         str_append(r, "\n\n");
 661 }
 662
 663 struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
 664 {
 665         struct symbol *sym;
 666         struct gstr res = str_new();
 667         int i;
 668
 669         for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
 670                 get_symbol_str(&res, sym, head);
 671         if (!i)
 672                 str_append(&res, _("No matches found.\n"));
 673         return res;
 674 }
 675
 676
 677 void menu_get_ext_help(struct menu *menu, struct gstr *help)
 678 {
 679         struct symbol *sym = menu->sym;
 680         const char *help_text = nohelp_text;
 681
 682         if (menu_has_help(menu)) {
 683                 if (sym->name)
 684                         str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
 685                 help_text = menu_get_help(menu);
 686         }
 687         str_printf(help, "%s\n", _(help_text));
 688         if (sym)
 689                 get_symbol_str(help, sym, NULL);
 690 }