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 kernel 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         current_entry->dir_dep = current_entry->dep;
 111 }
 112
 113 void menu_set_type(int type)
 114 {
 115         struct symbol *sym = current_entry->sym;
 116
 117         if (sym->type == type)
 118                 return;
 119         if (sym->type == S_UNKNOWN) {
 120                 sym->type = type;
 121                 return;
 122         }
 123         menu_warn(current_entry, "type of '%s' redefined 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)
 143                         prop_warn(prop, "prompt redefined");
 144                 current_entry->prompt = prop;
 145         }
 146         prop->text = prompt;
 147
 148         return prop;
 149 }
 150
 151 struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
 152 {
 153         return menu_add_prop(type, prompt, NULL, dep);
 154 }
 155
 156 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
 157 {
 158         menu_add_prop(type, NULL, expr, dep);
 159 }
 160
 161 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
 162 {
 163         menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
 164 }
 165
 166 void menu_add_option(int token, char *arg)
 167 {
 168         struct property *prop;
 169
 170         switch (token) {
 171         case T_OPT_MODULES:
 172                 prop = prop_alloc(P_DEFAULT, modules_sym);
 173                 prop->expr = expr_alloc_symbol(current_entry->sym);
 174                 break;
 175         case T_OPT_DEFCONFIG_LIST:
 176                 if (!sym_defconfig_list)
 177                         sym_defconfig_list = current_entry->sym;
 178                 else if (sym_defconfig_list != current_entry->sym)
 179                         zconf_error("trying to redefine defconfig symbol");
 180                 break;
 181         case T_OPT_ENV:
 182                 prop_add_env(arg);
 183                 break;
 184         }
 185 }
 186
 187 static int menu_range_valid_sym(struct symbol *sym, struct symbol *sym2)
 188 {
 189         return sym2->type == S_INT || sym2->type == S_HEX ||
 190                (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
 191 }
 192
 193 static void sym_check_prop(struct symbol *sym)
 194 {
 195         struct property *prop;
 196         struct symbol *sym2;
 197         for (prop = sym->prop; prop; prop = prop->next) {
 198                 switch (prop->type) {
 199                 case P_DEFAULT:
 200                         if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
 201                             prop->expr->type != E_SYMBOL)
 202                                 prop_warn(prop,
 203                                     "default for config symbol '%s'"
 204                                     " must be a single symbol", sym->name);
 205                         break;
 206                 case P_SELECT:
 207                         sym2 = prop_get_symbol(prop);
 208                         if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
 209                                 prop_warn(prop,
 210                                     "config symbol '%s' uses select, but is "
 211                                     "not boolean or tristate", sym->name);
 212                         else if (sym2->type != S_UNKNOWN &&
 213                                  sym2->type != S_BOOLEAN &&
 214                                  sym2->type != S_TRISTATE)
 215                                 prop_warn(prop,
 216                                     "'%s' has wrong type. 'select' only "
 217                                     "accept arguments of boolean and "
 218                                     "tristate type", sym2->name);
 219                         break;
 220                 case P_RANGE:
 221                         if (sym->type != S_INT && sym->type != S_HEX)
 222                                 prop_warn(prop, "range is only allowed "
 223                                                 "for int or hex symbols");
 224                         if (!menu_range_valid_sym(sym, prop->expr->left.sym) ||
 225                             !menu_range_valid_sym(sym, prop->expr->right.sym))
 226                                 prop_warn(prop, "range is invalid");
 227                         break;
 228                 default:
 229                         ;
 230                 }
 231         }
 232 }
 233
 234 void menu_finalize(struct menu *parent)
 235 {
 236         struct menu *menu, *last_menu;
 237         struct symbol *sym;
 238         struct property *prop;
 239         struct expr *parentdep, *basedep, *dep, *dep2, **ep;
 240
 241         sym = parent->sym;
 242         if (parent->list) {
 243                 if (sym && sym_is_choice(sym)) {
 244                         if (sym->type == S_UNKNOWN) {
 245                                 /* find the first choice value to find out choice type */
 246                                 current_entry = parent;
 247                                 for (menu = parent->list; menu; menu = menu->next) {
 248                                         if (menu->sym && menu->sym->type != S_UNKNOWN) {
 249                                                 menu_set_type(menu->sym->type);
 250                                                 break;
 251                                         }
 252                                 }
 253                         }
 254                         /* set the type of the remaining choice values */
 255                         for (menu = parent->list; menu; menu = menu->next) {
 256                                 current_entry = menu;
 257                                 if (menu->sym && menu->sym->type == S_UNKNOWN)
 258                                         menu_set_type(sym->type);
 259                         }
 260                         parentdep = expr_alloc_symbol(sym);
 261                 } else if (parent->prompt)
 262                         parentdep = parent->prompt->visible.expr;
 263                 else
 264                         parentdep = parent->dep;
 265
 266                 for (menu = parent->list; menu; menu = menu->next) {
 267                         basedep = expr_transform(menu->dep);
 268                         basedep = expr_alloc_and(expr_copy(parentdep), basedep);
 269                         basedep = expr_eliminate_dups(basedep);
 270                         menu->dep = basedep;
 271                         if (menu->sym)
 272                                 prop = menu->sym->prop;
 273                         else
 274                                 prop = menu->prompt;
 275                         for (; prop; prop = prop->next) {
 276                                 if (prop->menu != menu)
 277                                         continue;
 278                                 dep = expr_transform(prop->visible.expr);
 279                                 dep = expr_alloc_and(expr_copy(basedep), dep);
 280                                 dep = expr_eliminate_dups(dep);
 281                                 if (menu->sym && menu->sym->type != S_TRISTATE)
 282                                         dep = expr_trans_bool(dep);
 283                                 prop->visible.expr = dep;
 284                                 if (prop->type == P_SELECT) {
 285                                         struct symbol *es = prop_get_symbol(prop);
 286                                         es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
 287                                                         expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
 288                                 }
 289                         }
 290                 }
 291                 for (menu = parent->list; menu; menu = menu->next)
 292                         menu_finalize(menu);
 293         } else if (sym) {
 294                 /* ignore inherited dependencies for dir_dep */
 295                 sym->dir_dep.expr = expr_transform(expr_copy(parent->dir_dep));
 296                 sym->dir_dep.expr = expr_eliminate_dups(sym->dir_dep.expr);
 297
 298                 basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
 299                 basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
 300                 basedep = expr_eliminate_dups(expr_transform(basedep));
 301                 last_menu = NULL;
 302                 for (menu = parent->next; menu; menu = menu->next) {
 303                         dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
 304                         if (!expr_contains_symbol(dep, sym))
 305                                 break;
 306                         if (expr_depends_symbol(dep, sym))
 307                                 goto next;
 308                         dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
 309                         dep = expr_eliminate_dups(expr_transform(dep));
 310                         dep2 = expr_copy(basedep);
 311                         expr_eliminate_eq(&dep, &dep2);
 312                         expr_free(dep);
 313                         if (!expr_is_yes(dep2)) {
 314                                 expr_free(dep2);
 315                                 break;
 316                         }
 317                         expr_free(dep2);
 318                 next:
 319                         menu_finalize(menu);
 320                         menu->parent = parent;
 321                         last_menu = menu;
 322                 }
 323                 if (last_menu) {
 324                         parent->list = parent->next;
 325                         parent->next = last_menu->next;
 326                         last_menu->next = NULL;
 327                 }
 328         }
 329         for (menu = parent->list; menu; menu = menu->next) {
 330                 if (sym && sym_is_choice(sym) &&
 331                     menu->sym && !sym_is_choice_value(menu->sym)) {
 332                         current_entry = menu;
 333                         menu->sym->flags |= SYMBOL_CHOICEVAL;
 334                         if (!menu->prompt)
 335                                 menu_warn(menu, "choice value must have a prompt");
 336                         for (prop = menu->sym->prop; prop; prop = prop->next) {
 337                                 if (prop->type == P_DEFAULT)
 338                                         prop_warn(prop, "defaults for choice "
 339                                                   "values not supported");
 340                                 if (prop->menu == menu)
 341                                         continue;
 342                                 if (prop->type == P_PROMPT &&
 343                                     prop->menu->parent->sym != sym)
 344                                         prop_warn(prop, "choice value used outside its choice group");
 345                         }
 346                         /* Non-tristate choice values of tristate choices must
 347                          * depend on the choice being set to Y. The choice
 348                          * values' dependencies were propagated to their
 349                          * properties above, so the change here must be re-
 350                          * propagated.
 351                          */
 352                         if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
 353                                 basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
 354                                 menu->dep = expr_alloc_and(basedep, menu->dep);
 355                                 for (prop = menu->sym->prop; prop; prop = prop->next) {
 356                                         if (prop->menu != menu)
 357                                                 continue;
 358                                         prop->visible.expr = expr_alloc_and(expr_copy(basedep),
 359                                                                             prop->visible.expr);
 360                                 }
 361                         }
 362                         menu_add_symbol(P_CHOICE, sym, NULL);
 363                         prop = sym_get_choice_prop(sym);
 364                         for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
 365                                 ;
 366                         *ep = expr_alloc_one(E_LIST, NULL);
 367                         (*ep)->right.sym = menu->sym;
 368                 }
 369                 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
 370                         for (last_menu = menu->list; ; last_menu = last_menu->next) {
 371                                 last_menu->parent = parent;
 372                                 if (!last_menu->next)
 373                                         break;
 374                         }
 375                         last_menu->next = menu->next;
 376                         menu->next = menu->list;
 377                         menu->list = NULL;
 378                 }
 379         }
 380
 381         if (sym && !(sym->flags & SYMBOL_WARNED)) {
 382                 if (sym->type == S_UNKNOWN)
 383                         menu_warn(parent, "config symbol defined without type");
 384
 385                 if (sym_is_choice(sym) && !parent->prompt)
 386                         menu_warn(parent, "choice must have a prompt");
 387
 388                 /* Check properties connected to this symbol */
 389                 sym_check_prop(sym);
 390                 sym->flags |= SYMBOL_WARNED;
 391         }
 392
 393         if (sym && !sym_is_optional(sym) && parent->prompt) {
 394                 sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
 395                                 expr_alloc_and(parent->prompt->visible.expr,
 396                                         expr_alloc_symbol(&symbol_mod)));
 397         }
 398 }
 399
 400 bool menu_has_prompt(struct menu *menu)
 401 {
 402         if (!menu->prompt)
 403                 return false;
 404         return true;
 405 }
 406
 407 bool menu_is_visible(struct menu *menu)
 408 {
 409         struct menu *child;
 410         struct symbol *sym;
 411         tristate visible;
 412
 413         if (!menu->prompt)
 414                 return false;
 415
 416         sym = menu->sym;
 417         if (sym) {
 418                 sym_calc_value(sym);
 419                 visible = menu->prompt->visible.tri;
 420         } else
 421                 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
 422
 423         if (visible != no)
 424                 return true;
 425
 426         if (!sym || sym_get_tristate_value(menu->sym) == no)
 427                 return false;
 428
 429         for (child = menu->list; child; child = child->next) {
 430                 if (menu_is_visible(child)) {
 431                         if (sym)
 432                                 sym->flags |= SYMBOL_DEF_USER;
 433                         return true;
 434                 }
 435         }
 436
 437         return false;
 438 }
 439
 440 const char *menu_get_prompt(struct menu *menu)
 441 {
 442         if (menu->prompt)
 443                 return menu->prompt->text;
 444         else if (menu->sym)
 445                 return menu->sym->name;
 446         return NULL;
 447 }
 448
 449 struct menu *menu_get_root_menu(struct menu *menu)
 450 {
 451         return &rootmenu;
 452 }
 453
 454 struct menu *menu_get_parent_menu(struct menu *menu)
 455 {
 456         enum prop_type type;
 457
 458         for (; menu != &rootmenu; menu = menu->parent) {
 459                 type = menu->prompt ? menu->prompt->type : 0;
 460                 if (type == P_MENU)
 461                         break;
 462         }
 463         return menu;
 464 }
 465
 466 bool menu_has_help(struct menu *menu)
 467 {
 468         return menu->help != NULL;
 469 }
 470
 471 const char *menu_get_help(struct menu *menu)
 472 {
 473         if (menu->help)
 474                 return menu->help;
 475         else
 476                 return "";
 477 }
 478
 479 static void get_prompt_str(struct gstr *r, struct property *prop)
 480 {
 481         int i, j;
 482         struct menu *submenu[8], *menu;
 483
 484         str_printf(r, _("Prompt: %s\n"), _(prop->text));
 485         str_printf(r, _("  Defined at %s:%d\n"), prop->menu->file->name,
 486                 prop->menu->lineno);
 487         if (!expr_is_yes(prop->visible.expr)) {
 488                 str_append(r, _("  Depends on: "));
 489                 expr_gstr_print(prop->visible.expr, r);
 490                 str_append(r, "\n");
 491         }
 492         menu = prop->menu->parent;
 493         for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent)
 494                 submenu[i++] = menu;
 495         if (i > 0) {
 496                 str_printf(r, _("  Location:\n"));
 497                 for (j = 4; --i >= 0; j += 2) {
 498                         menu = submenu[i];
 499                         str_printf(r, "%*c-> %s", j, ' ', _(menu_get_prompt(menu)));
 500                         if (menu->sym) {
 501                                 str_printf(r, " (%s [=%s])", menu->sym->name ?
 502                                         menu->sym->name : _("<choice>"),
 503                                         sym_get_string_value(menu->sym));
 504                         }
 505                         str_append(r, "\n");
 506                 }
 507         }
 508 }
 509
 510 void get_symbol_str(struct gstr *r, struct symbol *sym)
 511 {
 512         bool hit;
 513         struct property *prop;
 514
 515         if (sym && sym->name) {
 516                 str_printf(r, "Symbol: %s [=%s]\n", sym->name,
 517                            sym_get_string_value(sym));
 518                 str_printf(r, "Type  : %s\n", sym_type_name(sym->type));
 519                 if (sym->type == S_INT || sym->type == S_HEX) {
 520                         prop = sym_get_range_prop(sym);
 521                         if (prop) {
 522                                 str_printf(r, "Range : ");
 523                                 expr_gstr_print(prop->expr, r);
 524                                 str_append(r, "\n");
 525                         }
 526                 }
 527         }
 528         for_all_prompts(sym, prop)
 529                 get_prompt_str(r, prop);
 530         hit = false;
 531         for_all_properties(sym, prop, P_SELECT) {
 532                 if (!hit) {
 533                         str_append(r, "  Selects: ");
 534                         hit = true;
 535                 } else
 536                         str_printf(r, " && ");
 537                 expr_gstr_print(prop->expr, r);
 538         }
 539         if (hit)
 540                 str_append(r, "\n");
 541         if (sym->rev_dep.expr) {
 542                 str_append(r, _("  Selected by: "));
 543                 expr_gstr_print(sym->rev_dep.expr, r);
 544                 str_append(r, "\n");
 545         }
 546         str_append(r, "\n\n");
 547 }
 548
 549 struct gstr get_relations_str(struct symbol **sym_arr)
 550 {
 551         struct symbol *sym;
 552         struct gstr res = str_new();
 553         int i;
 554
 555         for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
 556                 get_symbol_str(&res, sym);
 557         if (!i)
 558                 str_append(&res, _("No matches found.\n"));
 559         return res;
 560 }
 561
 562
 563 void menu_get_ext_help(struct menu *menu, struct gstr *help)
 564 {
 565         struct symbol *sym = menu->sym;
 566
 567         if (menu_has_help(menu)) {
 568                 if (sym->name) {
 569                         str_printf(help, "CONFIG_%s:\n\n", sym->name);
 570                         str_append(help, _(menu_get_help(menu)));
 571                         str_append(help, "\n");
 572                 }
 573         } else {
 574                 str_append(help, nohelp_text);
 575         }
 576         if (sym)
 577                 get_symbol_str(help, sym);
 578 }