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                 current_entry->prompt = prop;
 144         }
 145         prop->text = prompt;
 146
 147         return prop;
 148 }
 149
 150 struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
 151 {
 152         return menu_add_prop(type, prompt, NULL, dep);
 153 }
 154
 155 void menu_add_visibility(struct expr *expr)
 156 {
 157         current_entry->visibility = expr_alloc_and(current_entry->visibility,
 158             expr);
 159 }
 160
 161 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
 162 {
 163         menu_add_prop(type, NULL, expr, dep);
 164 }
 165
 166 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
 167 {
 168         menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
 169 }
 170
 171 void menu_add_option(int token, char *arg)
 172 {
 173         struct property *prop;
 174
 175         switch (token) {
 176         case T_OPT_MODULES:
 177                 prop = prop_alloc(P_DEFAULT, modules_sym);
 178                 prop->expr = expr_alloc_symbol(current_entry->sym);
 179                 break;
 180         case T_OPT_DEFCONFIG_LIST:
 181                 if (!sym_defconfig_list)
 182                         sym_defconfig_list = current_entry->sym;
 183                 else if (sym_defconfig_list != current_entry->sym)
 184                         zconf_error("trying to redefine defconfig symbol");
 185                 break;
 186         case T_OPT_ENV:
 187                 prop_add_env(arg);
 188                 break;
 189         }
 190 }
 191
 192 static int menu_range_valid_sym(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
 198 static void sym_check_prop(struct symbol *sym)
 199 {
 200         struct property *prop;
 201         struct symbol *sym2;
 202         for (prop = sym->prop; prop; prop = prop->next) {
 203                 switch (prop->type) {
 204                 case P_DEFAULT:
 205                         if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
 206                             prop->expr->type != E_SYMBOL)
 207                                 prop_warn(prop,
 208                                     "default for config symbol '%s'"
 209                                     " must be a single symbol", sym->name);
 210                         break;
 211                 case P_SELECT:
 212                         sym2 = prop_get_symbol(prop);
 213                         if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
 214                                 prop_warn(prop,
 215                                     "config symbol '%s' uses select, but is "
 216                                     "not boolean or tristate", sym->name);
 217                         else if (sym2->type != S_UNKNOWN &&
 218                                  sym2->type != S_BOOLEAN &&
 219                                  sym2->type != S_TRISTATE)
 220                                 prop_warn(prop,
 221                                     "'%s' has wrong type. 'select' only "
 222                                     "accept arguments of boolean and "
 223                                     "tristate type", sym2->name);
 224                         break;
 225                 case P_RANGE:
 226                         if (sym->type != S_INT && sym->type != S_HEX)
 227                                 prop_warn(prop, "range is only allowed "
 228                                                 "for int or hex symbols");
 229                         if (!menu_range_valid_sym(sym, prop->expr->left.sym) ||
 230                             !menu_range_valid_sym(sym, prop->expr->right.sym))
 231                                 prop_warn(prop, "range is invalid");
 232                         break;
 233                 default:
 234                         ;
 235                 }
 236         }
 237 }
 238
 239 void menu_finalize(struct menu *parent)
 240 {
 241         struct menu *menu, *last_menu;
 242         struct symbol *sym;
 243         struct property *prop;
 244         struct expr *parentdep, *basedep, *dep, *dep2, **ep;
 245
 246         sym = parent->sym;
 247         if (parent->list) {
 248                 if (sym && sym_is_choice(sym)) {
 249                         if (sym->type == S_UNKNOWN) {
 250                                 /* find the first choice value to find out choice type */
 251                                 current_entry = parent;
 252                                 for (menu = parent->list; menu; menu = menu->next) {
 253                                         if (menu->sym && menu->sym->type != S_UNKNOWN) {
 254                                                 menu_set_type(menu->sym->type);
 255                                                 break;
 256                                         }
 257                                 }
 258                         }
 259                         /* set the type of the remaining choice values */
 260                         for (menu = parent->list; menu; menu = menu->next) {
 261                                 current_entry = menu;
 262                                 if (menu->sym && menu->sym->type == S_UNKNOWN)
 263                                         menu_set_type(sym->type);
 264                         }
 265                         parentdep = expr_alloc_symbol(sym);
 266                 } else if (parent->prompt)
 267                         parentdep = parent->prompt->visible.expr;
 268                 else
 269                         parentdep = parent->dep;
 270
 271                 for (menu = parent->list; menu; menu = menu->next) {
 272                         basedep = expr_transform(menu->dep);
 273                         basedep = expr_alloc_and(expr_copy(parentdep), basedep);
 274                         basedep = expr_eliminate_dups(basedep);
 275                         menu->dep = basedep;
 276                         if (menu->sym)
 277                                 prop = menu->sym->prop;
 278                         else
 279                                 prop = menu->prompt;
 280                         for (; prop; prop = prop->next) {
 281                                 if (prop->menu != menu)
 282                                         continue;
 283                                 dep = expr_transform(prop->visible.expr);
 284                                 dep = expr_alloc_and(expr_copy(basedep), dep);
 285                                 dep = expr_eliminate_dups(dep);
 286                                 if (menu->sym && menu->sym->type != S_TRISTATE)
 287                                         dep = expr_trans_bool(dep);
 288                                 prop->visible.expr = dep;
 289                                 if (prop->type == P_SELECT) {
 290                                         struct symbol *es = prop_get_symbol(prop);
 291                                         es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
 292                                                         expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
 293                                 }
 294                         }
 295                 }
 296                 for (menu = parent->list; menu; menu = menu->next)
 297                         menu_finalize(menu);
 298         } else if (sym) {
 299                 basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
 300                 basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
 301                 basedep = expr_eliminate_dups(expr_transform(basedep));
 302                 last_menu = NULL;
 303                 for (menu = parent->next; menu; menu = menu->next) {
 304                         dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
 305                         if (!expr_contains_symbol(dep, sym))
 306                                 break;
 307                         if (expr_depends_symbol(dep, sym))
 308                                 goto next;
 309                         dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
 310                         dep = expr_eliminate_dups(expr_transform(dep));
 311                         dep2 = expr_copy(basedep);
 312                         expr_eliminate_eq(&dep, &dep2);
 313                         expr_free(dep);
 314                         if (!expr_is_yes(dep2)) {
 315                                 expr_free(dep2);
 316                                 break;
 317                         }
 318                         expr_free(dep2);
 319                 next:
 320                         menu_finalize(menu);
 321                         menu->parent = parent;
 322                         last_menu = menu;
 323                 }
 324                 if (last_menu) {
 325                         parent->list = parent->next;
 326                         parent->next = last_menu->next;
 327                         last_menu->next = NULL;
 328                 }
 329
 330                 sym->dir_dep.expr = parent->dep;
 331         }
 332         for (menu = parent->list; menu; menu = menu->next) {
 333                 if (sym && sym_is_choice(sym) &&
 334                     menu->sym && !sym_is_choice_value(menu->sym)) {
 335                         current_entry = menu;
 336                         menu->sym->flags |= SYMBOL_CHOICEVAL;
 337                         if (!menu->prompt)
 338                                 menu_warn(menu, "choice value must have a prompt");
 339                         for (prop = menu->sym->prop; prop; prop = prop->next) {
 340                                 if (prop->type == P_DEFAULT)
 341                                         prop_warn(prop, "defaults for choice "
 342                                                   "values not supported");
 343                                 if (prop->menu == menu)
 344                                         continue;
 345                                 if (prop->type == P_PROMPT &&
 346                                     prop->menu->parent->sym != sym)
 347                                         prop_warn(prop, "choice value used outside its choice group");
 348                         }
 349                         /* Non-tristate choice values of tristate choices must
 350                          * depend on the choice being set to Y. The choice
 351                          * values' dependencies were propagated to their
 352                          * properties above, so the change here must be re-
 353                          * propagated.
 354                          */
 355                         if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
 356                                 basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
 357                                 menu->dep = expr_alloc_and(basedep, menu->dep);
 358                                 for (prop = menu->sym->prop; prop; prop = prop->next) {
 359                                         if (prop->menu != menu)
 360                                                 continue;
 361                                         prop->visible.expr = expr_alloc_and(expr_copy(basedep),
 362                                                                             prop->visible.expr);
 363                                 }
 364                         }
 365                         menu_add_symbol(P_CHOICE, sym, NULL);
 366                         prop = sym_get_choice_prop(sym);
 367                         for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
 368                                 ;
 369                         *ep = expr_alloc_one(E_LIST, NULL);
 370                         (*ep)->right.sym = menu->sym;
 371                 }
 372                 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
 373                         for (last_menu = menu->list; ; last_menu = last_menu->next) {
 374                                 last_menu->parent = parent;
 375                                 if (!last_menu->next)
 376                                         break;
 377                         }
 378                         last_menu->next = menu->next;
 379                         menu->next = menu->list;
 380                         menu->list = NULL;
 381                 }
 382         }
 383
 384         if (sym && !(sym->flags & SYMBOL_WARNED)) {
 385                 if (sym->type == S_UNKNOWN)
 386                         menu_warn(parent, "config symbol defined without type");
 387
 388                 if (sym_is_choice(sym) && !parent->prompt)
 389                         menu_warn(parent, "choice must have a prompt");
 390
 391                 /* Check properties connected to this symbol */
 392                 sym_check_prop(sym);
 393                 sym->flags |= SYMBOL_WARNED;
 394         }
 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
 403 bool menu_has_prompt(struct menu *menu)
 404 {
 405         if (!menu->prompt)
 406                 return false;
 407         return true;
 408 }
 409
 410 bool menu_is_visible(struct menu *menu)
 411 {
 412         struct menu *child;
 413         struct symbol *sym;
 414         tristate visible;
 415
 416         if (!menu->prompt)
 417                 return false;
 418
 419         if (menu->visibility) {
 420                 if (expr_calc_value(menu->visibility) == no)
 421                         return no;
 422         }
 423
 424         sym = menu->sym;
 425         if (sym) {
 426                 sym_calc_value(sym);
 427                 visible = menu->prompt->visible.tri;
 428         } else
 429                 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
 430
 431         if (visible != no)
 432                 return true;
 433
 434         if (!sym || sym_get_tristate_value(menu->sym) == no)
 435                 return false;
 436
 437         for (child = menu->list; child; child = child->next) {
 438                 if (menu_is_visible(child)) {
 439                         if (sym)
 440                                 sym->flags |= SYMBOL_DEF_USER;
 441                         return true;
 442                 }
 443         }
 444
 445         return false;
 446 }
 447
 448 const char *menu_get_prompt(struct menu *menu)
 449 {
 450         if (menu->prompt)
 451                 return menu->prompt->text;
 452         else if (menu->sym)
 453                 return menu->sym->name;
 454         return NULL;
 455 }
 456
 457 struct menu *menu_get_root_menu(struct menu *menu)
 458 {
 459         return &rootmenu;
 460 }
 461
 462 struct menu *menu_get_parent_menu(struct menu *menu)
 463 {
 464         enum prop_type type;
 465
 466         for (; menu != &rootmenu; menu = menu->parent) {
 467                 type = menu->prompt ? menu->prompt->type : 0;
 468                 if (type == P_MENU)
 469                         break;
 470         }
 471         return menu;
 472 }
 473
 474 bool menu_has_help(struct menu *menu)
 475 {
 476         return menu->help != NULL;
 477 }
 478
 479 const char *menu_get_help(struct menu *menu)
 480 {
 481         if (menu->help)
 482                 return menu->help;
 483         else
 484                 return "";
 485 }
 486
 487 static void get_prompt_str(struct gstr *r, struct property *prop)
 488 {
 489         int i, j;
 490         struct menu *submenu[8], *menu;
 491
 492         str_printf(r, _("Prompt: %s\n"), _(prop->text));
 493         str_printf(r, _("  Defined at %s:%d\n"), prop->menu->file->name,
 494                 prop->menu->lineno);
 495         if (!expr_is_yes(prop->visible.expr)) {
 496                 str_append(r, _("  Depends on: "));
 497                 expr_gstr_print(prop->visible.expr, r);
 498                 str_append(r, "\n");
 499         }
 500         menu = prop->menu->parent;
 501         for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent)
 502                 submenu[i++] = menu;
 503         if (i > 0) {
 504                 str_printf(r, _("  Location:\n"));
 505                 for (j = 4; --i >= 0; j += 2) {
 506                         menu = submenu[i];
 507                         str_printf(r, "%*c-> %s", j, ' ', _(menu_get_prompt(menu)));
 508                         if (menu->sym) {
 509                                 str_printf(r, " (%s [=%s])", menu->sym->name ?
 510                                         menu->sym->name : _("<choice>"),
 511                                         sym_get_string_value(menu->sym));
 512                         }
 513                         str_append(r, "\n");
 514                 }
 515         }
 516 }
 517
 518 void get_symbol_str(struct gstr *r, struct symbol *sym)
 519 {
 520         bool hit;
 521         struct property *prop;
 522
 523         if (sym && sym->name) {
 524                 str_printf(r, "Symbol: %s [=%s]\n", sym->name,
 525                            sym_get_string_value(sym));
 526                 str_printf(r, "Type  : %s\n", sym_type_name(sym->type));
 527                 if (sym->type == S_INT || sym->type == S_HEX) {
 528                         prop = sym_get_range_prop(sym);
 529                         if (prop) {
 530                                 str_printf(r, "Range : ");
 531                                 expr_gstr_print(prop->expr, r);
 532                                 str_append(r, "\n");
 533                         }
 534                 }
 535         }
 536         for_all_prompts(sym, prop)
 537                 get_prompt_str(r, prop);
 538         hit = false;
 539         for_all_properties(sym, prop, P_SELECT) {
 540                 if (!hit) {
 541                         str_append(r, "  Selects: ");
 542                         hit = true;
 543                 } else
 544                         str_printf(r, " && ");
 545                 expr_gstr_print(prop->expr, r);
 546         }
 547         if (hit)
 548                 str_append(r, "\n");
 549         if (sym->rev_dep.expr) {
 550                 str_append(r, _("  Selected by: "));
 551                 expr_gstr_print(sym->rev_dep.expr, r);
 552                 str_append(r, "\n");
 553         }
 554         str_append(r, "\n\n");
 555 }
 556
 557 struct gstr get_relations_str(struct symbol **sym_arr)
 558 {
 559         struct symbol *sym;
 560         struct gstr res = str_new();
 561         int i;
 562
 563         for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
 564                 get_symbol_str(&res, sym);
 565         if (!i)
 566                 str_append(&res, _("No matches found.\n"));
 567         return res;
 568 }
 569
 570
 571 void menu_get_ext_help(struct menu *menu, struct gstr *help)
 572 {
 573         struct symbol *sym = menu->sym;
 574
 575         if (menu_has_help(menu)) {
 576                 if (sym->name) {
 577                         str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
 578                         str_append(help, _(menu_get_help(menu)));
 579                         str_append(help, "\n");
 580                 }
 581         } else {
 582                 str_append(help, nohelp_text);
 583         }
 584         if (sym)
 585                 get_symbol_str(help, sym);
 586 }