scripts/kconfig/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 <stdlib.h>
   7 #include <string.h>
   8
   9 #define LKC_DIRECT_LINK
  10 #include "lkc.h"
  11
  12 static const char nohelp_text[] = N_(
  13         "There is no help available for this option.\n");
  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 = malloc(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                                 if (!menu->visibility)
 150                                         continue;
 151                                 prop->visible.expr
 152                                         = expr_alloc_and(prop->visible.expr,
 153                                                          menu->visibility);
 154                         }
 155                 }
 156
 157                 current_entry->prompt = prop;
 158         }
 159         prop->text = prompt;
 160
 161         return prop;
 162 }
 163
 164 struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
 165 {
 166         return menu_add_prop(type, prompt, NULL, dep);
 167 }
 168
 169 void menu_add_visibility(struct expr *expr)
 170 {
 171         current_entry->visibility = expr_alloc_and(current_entry->visibility,
 172             expr);
 173 }
 174
 175 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
 176 {
 177         menu_add_prop(type, NULL, expr, dep);
 178 }
 179
 180 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
 181 {
 182         menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
 183 }
 184
 185 void menu_add_option(int token, char *arg)
 186 {
 187         struct property *prop;
 188
 189         switch (token) {
 190         case T_OPT_MODULES:
 191                 prop = prop_alloc(P_DEFAULT, modules_sym);
 192                 prop->expr = expr_alloc_symbol(current_entry->sym);
 193                 break;
 194         case T_OPT_DEFCONFIG_LIST:
 195                 if (!sym_defconfig_list)
 196                         sym_defconfig_list = current_entry->sym;
 197                 else if (sym_defconfig_list != current_entry->sym)
 198                         zconf_error("trying to redefine defconfig symbol");
 199                 break;
 200         case T_OPT_ENV:
 201                 prop_add_env(arg);
 202                 break;
 203         }
 204 }
 205
 206 static int menu_range_valid_sym(struct symbol *sym, struct symbol *sym2)
 207 {
 208         return sym2->type == S_INT || sym2->type == S_HEX ||
 209                (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
 210 }
 211
 212 static void sym_check_prop(struct symbol *sym)
 213 {
 214         struct property *prop;
 215         struct symbol *sym2;
 216         for (prop = sym->prop; prop; prop = prop->next) {
 217                 switch (prop->type) {
 218                 case P_DEFAULT:
 219                         if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
 220                             prop->expr->type != E_SYMBOL)
 221                                 prop_warn(prop,
 222                                     "default for config symbol '%s'"
 223                                     " must be a single symbol", sym->name);
 224                         break;
 225                 case P_SELECT:
 226                         sym2 = prop_get_symbol(prop);
 227                         if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
 228                                 prop_warn(prop,
 229                                     "config symbol '%s' uses select, but is "
 230                                     "not boolean or tristate", sym->name);
 231                         else if (sym2->type != S_UNKNOWN &&
 232                                  sym2->type != S_BOOLEAN &&
 233                                  sym2->type != S_TRISTATE)
 234                                 prop_warn(prop,
 235                                     "'%s' has wrong type. 'select' only "
 236                                     "accept arguments of boolean and "
 237                                     "tristate type", sym2->name);
 238                         break;
 239                 case P_RANGE:
 240                         if (sym->type != S_INT && sym->type != S_HEX)
 241                                 prop_warn(prop, "range is only allowed "
 242                                                 "for int or hex symbols");
 243                         if (!menu_range_valid_sym(sym, prop->expr->left.sym) ||
 244                             !menu_range_valid_sym(sym, prop->expr->right.sym))
 245                                 prop_warn(prop, "range is invalid");
 246                         break;
 247                 default:
 248                         ;
 249                 }
 250         }
 251 }
 252
 253 void menu_finalize(struct menu *parent)
 254 {
 255         struct menu *menu, *last_menu;
 256         struct symbol *sym;
 257         struct property *prop;
 258         struct expr *parentdep, *basedep, *dep, *dep2, **ep;
 259
 260         sym = parent->sym;
 261         if (parent->list) {
 262                 if (sym && sym_is_choice(sym)) {
 263                         if (sym->type == S_UNKNOWN) {
 264                                 /* find the first choice value to find out choice type */
 265                                 current_entry = parent;
 266                                 for (menu = parent->list; menu; menu = menu->next) {
 267                                         if (menu->sym && menu->sym->type != S_UNKNOWN) {
 268                                                 menu_set_type(menu->sym->type);
 269                                                 break;
 270                                         }
 271                                 }
 272                         }
 273                         /* set the type of the remaining choice values */
 274                         for (menu = parent->list; menu; menu = menu->next) {
 275                                 current_entry = menu;
 276                                 if (menu->sym && menu->sym->type == S_UNKNOWN)
 277                                         menu_set_type(sym->type);
 278                         }
 279                         parentdep = expr_alloc_symbol(sym);
 280                 } else if (parent->prompt)
 281                         parentdep = parent->prompt->visible.expr;
 282                 else
 283                         parentdep = parent->dep;
 284
 285                 for (menu = parent->list; menu; menu = menu->next) {
 286                         basedep = expr_transform(menu->dep);
 287                         basedep = expr_alloc_and(expr_copy(parentdep), basedep);
 288                         basedep = expr_eliminate_dups(basedep);
 289                         menu->dep = basedep;
 290                         if (menu->sym)
 291                                 prop = menu->sym->prop;
 292                         else
 293                                 prop = menu->prompt;
 294                         for (; prop; prop = prop->next) {
 295                                 if (prop->menu != menu)
 296                                         continue;
 297                                 dep = expr_transform(prop->visible.expr);
 298                                 dep = expr_alloc_and(expr_copy(basedep), dep);
 299                                 dep = expr_eliminate_dups(dep);
 300                                 if (menu->sym && menu->sym->type != S_TRISTATE)
 301                                         dep = expr_trans_bool(dep);
 302                                 prop->visible.expr = dep;
 303                                 if (prop->type == P_SELECT) {
 304                                         struct symbol *es = prop_get_symbol(prop);
 305                                         es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
 306                                                         expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
 307                                 }
 308                         }
 309                 }
 310                 for (menu = parent->list; menu; menu = menu->next)
 311                         menu_finalize(menu);
 312         } else if (sym) {
 313                 basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
 314                 basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
 315                 basedep = expr_eliminate_dups(expr_transform(basedep));
 316                 last_menu = NULL;
 317                 for (menu = parent->next; menu; menu = menu->next) {
 318                         dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
 319                         if (!expr_contains_symbol(dep, sym))
 320                                 break;
 321                         if (expr_depends_symbol(dep, sym))
 322                                 goto next;
 323                         dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
 324                         dep = expr_eliminate_dups(expr_transform(dep));
 325                         dep2 = expr_copy(basedep);
 326                         expr_eliminate_eq(&dep, &dep2);
 327                         expr_free(dep);
 328                         if (!expr_is_yes(dep2)) {
 329                                 expr_free(dep2);
 330                                 break;
 331                         }
 332                         expr_free(dep2);
 333                 next:
 334                         menu_finalize(menu);
 335                         menu->parent = parent;
 336                         last_menu = menu;
 337                 }
 338                 if (last_menu) {
 339                         parent->list = parent->next;
 340                         parent->next = last_menu->next;
 341                         last_menu->next = NULL;
 342                 }
 343
 344                 sym->dir_dep.expr = parent->dep;
 345         }
 346         for (menu = parent->list; menu; menu = menu->next) {
 347                 if (sym && sym_is_choice(sym) &&
 348                     menu->sym && !sym_is_choice_value(menu->sym)) {
 349                         current_entry = menu;
 350                         menu->sym->flags |= SYMBOL_CHOICEVAL;
 351                         if (!menu->prompt)
 352                                 menu_warn(menu, "choice value must have a prompt");
 353                         for (prop = menu->sym->prop; prop; prop = prop->next) {
 354                                 if (prop->type == P_DEFAULT)
 355                                         prop_warn(prop, "defaults for choice "
 356                                                   "values not supported");
 357                                 if (prop->menu == menu)
 358                                         continue;
 359                                 if (prop->type == P_PROMPT &&
 360                                     prop->menu->parent->sym != sym)
 361                                         prop_warn(prop, "choice value used outside its choice group");
 362                         }
 363                         /* Non-tristate choice values of tristate choices must
 364                          * depend on the choice being set to Y. The choice
 365                          * values' dependencies were propagated to their
 366                          * properties above, so the change here must be re-
 367                          * propagated.
 368                          */
 369                         if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
 370                                 basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
 371                                 menu->dep = expr_alloc_and(basedep, menu->dep);
 372                                 for (prop = menu->sym->prop; prop; prop = prop->next) {
 373                                         if (prop->menu != menu)
 374                                                 continue;
 375                                         prop->visible.expr = expr_alloc_and(expr_copy(basedep),
 376                                                                             prop->visible.expr);
 377                                 }
 378                         }
 379                         menu_add_symbol(P_CHOICE, sym, NULL);
 380                         prop = sym_get_choice_prop(sym);
 381                         for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
 382                                 ;
 383                         *ep = expr_alloc_one(E_LIST, NULL);
 384                         (*ep)->right.sym = menu->sym;
 385                 }
 386                 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
 387                         for (last_menu = menu->list; ; last_menu = last_menu->next) {
 388                                 last_menu->parent = parent;
 389                                 if (!last_menu->next)
 390                                         break;
 391                         }
 392                         last_menu->next = menu->next;
 393                         menu->next = menu->list;
 394                         menu->list = NULL;
 395                 }
 396         }
 397
 398         if (sym && !(sym->flags & SYMBOL_WARNED)) {
 399                 if (sym->type == S_UNKNOWN)
 400                         menu_warn(parent, "config symbol defined without type");
 401
 402                 if (sym_is_choice(sym) && !parent->prompt)
 403                         menu_warn(parent, "choice must have a prompt");
 404
 405                 /* Check properties connected to this symbol */
 406                 sym_check_prop(sym);
 407                 sym->flags |= SYMBOL_WARNED;
 408         }
 409
 410         if (sym && !sym_is_optional(sym) && parent->prompt) {
 411                 sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
 412                                 expr_alloc_and(parent->prompt->visible.expr,
 413                                         expr_alloc_symbol(&symbol_mod)));
 414         }
 415 }
 416
 417 bool menu_has_prompt(struct menu *menu)
 418 {
 419         if (!menu->prompt)
 420                 return false;
 421         return true;
 422 }
 423
 424 bool menu_is_visible(struct menu *menu)
 425 {
 426         struct menu *child;
 427         struct symbol *sym;
 428         tristate visible;
 429
 430         if (!menu->prompt)
 431                 return false;
 432
 433         if (menu->visibility) {
 434                 if (expr_calc_value(menu->visibility) == no)
 435                         return no;
 436         }
 437
 438         sym = menu->sym;
 439         if (sym) {
 440                 sym_calc_value(sym);
 441                 visible = menu->prompt->visible.tri;
 442         } else
 443                 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
 444
 445         if (visible != no)
 446                 return true;
 447
 448         if (!sym || sym_get_tristate_value(menu->sym) == no)
 449                 return false;
 450
 451         for (child = menu->list; child; child = child->next) {
 452                 if (menu_is_visible(child)) {
 453                         if (sym)
 454                                 sym->flags |= SYMBOL_DEF_USER;
 455                         return true;
 456                 }
 457         }
 458
 459         return false;
 460 }
 461
 462 const char *menu_get_prompt(struct menu *menu)
 463 {
 464         if (menu->prompt)
 465                 return menu->prompt->text;
 466         else if (menu->sym)
 467                 return menu->sym->name;
 468         return NULL;
 469 }
 470
 471 struct menu *menu_get_root_menu(struct menu *menu)
 472 {
 473         return &rootmenu;
 474 }
 475
 476 struct menu *menu_get_parent_menu(struct menu *menu)
 477 {
 478         enum prop_type type;
 479
 480         for (; menu != &rootmenu; menu = menu->parent) {
 481                 type = menu->prompt ? menu->prompt->type : 0;
 482                 if (type == P_MENU)
 483                         break;
 484         }
 485         return menu;
 486 }
 487
 488 bool menu_has_help(struct menu *menu)
 489 {
 490         return menu->help != NULL;
 491 }
 492
 493 const char *menu_get_help(struct menu *menu)
 494 {
 495         if (menu->help)
 496                 return menu->help;
 497         else
 498                 return "";
 499 }
 500
 501 static void get_prompt_str(struct gstr *r, struct property *prop)
 502 {
 503         int i, j;
 504         struct menu *submenu[8], *menu;
 505
 506         str_printf(r, _("Prompt: %s\n"), _(prop->text));
 507         str_printf(r, _("  Defined at %s:%d\n"), prop->menu->file->name,
 508                 prop->menu->lineno);
 509         if (!expr_is_yes(prop->visible.expr)) {
 510                 str_append(r, _("  Depends on: "));
 511                 expr_gstr_print(prop->visible.expr, r);
 512                 str_append(r, "\n");
 513         }
 514         menu = prop->menu->parent;
 515         for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent)
 516                 submenu[i++] = menu;
 517         if (i > 0) {
 518                 str_printf(r, _("  Location:\n"));
 519                 for (j = 4; --i >= 0; j += 2) {
 520                         menu = submenu[i];
 521                         str_printf(r, "%*c-> %s", j, ' ', _(menu_get_prompt(menu)));
 522                         if (menu->sym) {
 523                                 str_printf(r, " (%s [=%s])", menu->sym->name ?
 524                                         menu->sym->name : _("<choice>"),
 525                                         sym_get_string_value(menu->sym));
 526                         }
 527                         str_append(r, "\n");
 528                 }
 529         }
 530 }
 531
 532 void get_symbol_str(struct gstr *r, struct symbol *sym)
 533 {
 534         bool hit;
 535         struct property *prop;
 536
 537         if (sym && sym->name) {
 538                 str_printf(r, "Symbol: %s [=%s]\n", sym->name,
 539                            sym_get_string_value(sym));
 540                 str_printf(r, "Type  : %s\n", sym_type_name(sym->type));
 541                 if (sym->type == S_INT || sym->type == S_HEX) {
 542                         prop = sym_get_range_prop(sym);
 543                         if (prop) {
 544                                 str_printf(r, "Range : ");
 545                                 expr_gstr_print(prop->expr, r);
 546                                 str_append(r, "\n");
 547                         }
 548                 }
 549         }
 550         for_all_prompts(sym, prop)
 551                 get_prompt_str(r, prop);
 552         hit = false;
 553         for_all_properties(sym, prop, P_SELECT) {
 554                 if (!hit) {
 555                         str_append(r, "  Selects: ");
 556                         hit = true;
 557                 } else
 558                         str_printf(r, " && ");
 559                 expr_gstr_print(prop->expr, r);
 560         }
 561         if (hit)
 562                 str_append(r, "\n");
 563         if (sym->rev_dep.expr) {
 564                 str_append(r, _("  Selected by: "));
 565                 expr_gstr_print(sym->rev_dep.expr, r);
 566                 str_append(r, "\n");
 567         }
 568         str_append(r, "\n\n");
 569 }
 570
 571 struct gstr get_relations_str(struct symbol **sym_arr)
 572 {
 573         struct symbol *sym;
 574         struct gstr res = str_new();
 575         int i;
 576
 577         for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
 578                 get_symbol_str(&res, sym);
 579         if (!i)
 580                 str_append(&res, _("No matches found.\n"));
 581         return res;
 582 }
 583
 584
 585 void menu_get_ext_help(struct menu *menu, struct gstr *help)
 586 {
 587         struct symbol *sym = menu->sym;
 588
 589         if (menu_has_help(menu)) {
 590                 if (sym->name) {
 591                         str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
 592                         str_append(help, _(menu_get_help(menu)));
 593                         str_append(help, "\n");
 594                 }
 595         } else {
 596                 str_append(help, nohelp_text);
 597         }
 598         if (sym)
 599                 get_symbol_str(help, sym);
 600 }