tools/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 <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,
 123                 "ignoring type redefinition of '%s' from '%s' to '%s'",
 124                 sym->name ? sym->name : "<choice>",
 125                 sym_type_name(sym->type), sym_type_name(type));
 126 }
 127
 128 static struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
 129 {
 130         struct property *prop = prop_alloc(type, current_entry->sym);
 131
 132         prop->menu = current_entry;
 133         prop->expr = expr;
 134         prop->visible.expr = menu_check_dep(dep);
 135
 136         if (prompt) {
 137                 if (isspace(*prompt)) {
 138                         prop_warn(prop, "leading whitespace ignored");
 139                         while (isspace(*prompt))
 140                                 prompt++;
 141                 }
 142                 if (current_entry->prompt && current_entry != &rootmenu)
 143                         prop_warn(prop, "prompt redefined");
 144
 145                 /* Apply all upper menus' visibilities to actual prompts. */
 146                 if(type == P_PROMPT) {
 147                         struct menu *menu = current_entry;
 148
 149                         while ((menu = menu->parent) != NULL) {
 150                                 struct expr *dup_expr;
 151
 152                                 if (!menu->visibility)
 153                                         continue;
 154                                 /*
 155                                  * Do not add a reference to the
 156                                  * menu's visibility expression but
 157                                  * use a copy of it.  Otherwise the
 158                                  * expression reduction functions
 159                                  * will modify expressions that have
 160                                  * multiple references which can
 161                                  * cause unwanted side effects.
 162                                  */
 163                                 dup_expr = expr_copy(menu->visibility);
 164
 165                                 prop->visible.expr
 166                                         = expr_alloc_and(prop->visible.expr,
 167                                                          dup_expr);
 168                         }
 169                 }
 170
 171                 current_entry->prompt = prop;
 172         }
 173         prop->text = prompt;
 174
 175         return prop;
 176 }
 177
 178 struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
 179 {
 180         return menu_add_prop(type, prompt, NULL, dep);
 181 }
 182
 183 void menu_add_visibility(struct expr *expr)
 184 {
 185         current_entry->visibility = expr_alloc_and(current_entry->visibility,
 186             expr);
 187 }
 188
 189 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
 190 {
 191         menu_add_prop(type, NULL, expr, dep);
 192 }
 193
 194 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
 195 {
 196         menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
 197 }
 198
 199 void menu_add_option(int token, char *arg)
 200 {
 201         switch (token) {
 202         case T_OPT_MODULES:
 203                 if (modules_sym)
 204                         zconf_error("symbol '%s' redefines option 'modules'"
 205                                     " already defined by symbol '%s'",
 206                                     current_entry->sym->name,
 207                                     modules_sym->name
 208                                     );
 209                 modules_sym = current_entry->sym;
 210                 break;
 211         case T_OPT_DEFCONFIG_LIST:
 212                 if (!sym_defconfig_list)
 213                         sym_defconfig_list = current_entry->sym;
 214                 else if (sym_defconfig_list != current_entry->sym)
 215                         zconf_error("trying to redefine defconfig symbol");
 216                 break;
 217         case T_OPT_ENV:
 218                 prop_add_env(arg);
 219                 break;
 220         case T_OPT_ALLNOCONFIG_Y:
 221                 current_entry->sym->flags |= SYMBOL_ALLNOCONFIG_Y;
 222                 break;
 223         }
 224 }
 225
 226 static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
 227 {
 228         return sym2->type == S_INT || sym2->type == S_HEX ||
 229                (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
 230 }
 231
 232 static void sym_check_prop(struct symbol *sym)
 233 {
 234         struct property *prop;
 235         struct symbol *sym2;
 236         char *use;
 237
 238         for (prop = sym->prop; prop; prop = prop->next) {
 239                 switch (prop->type) {
 240                 case P_DEFAULT:
 241                         if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
 242                             prop->expr->type != E_SYMBOL)
 243                                 prop_warn(prop,
 244                                     "default for config symbol '%s'"
 245                                     " must be a single symbol", sym->name);
 246                         if (prop->expr->type != E_SYMBOL)
 247                                 break;
 248                         sym2 = prop_get_symbol(prop);
 249                         if (sym->type == S_HEX || sym->type == S_INT) {
 250                                 if (!menu_validate_number(sym, sym2))
 251                                         prop_warn(prop,
 252                                             "'%s': number is invalid",
 253                                             sym->name);
 254                         }
 255                         break;
 256                 case P_SELECT:
 257                 case P_IMPLY:
 258                         use = prop->type == P_SELECT ? "select" : "imply";
 259                         sym2 = prop_get_symbol(prop);
 260                         if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
 261                                 prop_warn(prop,
 262                                     "config symbol '%s' uses %s, but is "
 263                                     "not boolean or tristate", sym->name, use);
 264                         else if (sym2->type != S_UNKNOWN &&
 265                                  sym2->type != S_BOOLEAN &&
 266                                  sym2->type != S_TRISTATE)
 267                                 prop_warn(prop,
 268                                     "'%s' has wrong type. '%s' only "
 269                                     "accept arguments of boolean and "
 270                                     "tristate type", sym2->name, use);
 271                         break;
 272                 case P_RANGE:
 273                         if (sym->type != S_INT && sym->type != S_HEX)
 274                                 prop_warn(prop, "range is only allowed "
 275                                                 "for int or hex symbols");
 276                         if (!menu_validate_number(sym, prop->expr->left.sym) ||
 277                             !menu_validate_number(sym, prop->expr->right.sym))
 278                                 prop_warn(prop, "range is invalid");
 279                         break;
 280                 default:
 281                         ;
 282                 }
 283         }
 284 }
 285
 286 void menu_finalize(struct menu *parent)
 287 {
 288         struct menu *menu, *last_menu;
 289         struct symbol *sym;
 290         struct property *prop;
 291         struct expr *parentdep, *basedep, *dep, *dep2, **ep;
 292
 293         sym = parent->sym;
 294         if (parent->list) {
 295                 if (sym && sym_is_choice(sym)) {
 296                         if (sym->type == S_UNKNOWN) {
 297                                 /* find the first choice value to find out choice type */
 298                                 current_entry = parent;
 299                                 for (menu = parent->list; menu; menu = menu->next) {
 300                                         if (menu->sym && menu->sym->type != S_UNKNOWN) {
 301                                                 menu_set_type(menu->sym->type);
 302                                                 break;
 303                                         }
 304                                 }
 305                         }
 306                         /* set the type of the remaining choice values */
 307                         for (menu = parent->list; menu; menu = menu->next) {
 308                                 current_entry = menu;
 309                                 if (menu->sym && menu->sym->type == S_UNKNOWN)
 310                                         menu_set_type(sym->type);
 311                         }
 312                         parentdep = expr_alloc_symbol(sym);
 313                 } else if (parent->prompt)
 314                         parentdep = parent->prompt->visible.expr;
 315                 else
 316                         parentdep = parent->dep;
 317
 318                 for (menu = parent->list; menu; menu = menu->next) {
 319                         basedep = expr_transform(menu->dep);
 320                         basedep = expr_alloc_and(expr_copy(parentdep), basedep);
 321                         basedep = expr_eliminate_dups(basedep);
 322                         menu->dep = basedep;
 323                         if (menu->sym)
 324                                 prop = menu->sym->prop;
 325                         else
 326                                 prop = menu->prompt;
 327                         for (; prop; prop = prop->next) {
 328                                 if (prop->menu != menu)
 329                                         continue;
 330                                 dep = expr_transform(prop->visible.expr);
 331                                 dep = expr_alloc_and(expr_copy(basedep), dep);
 332                                 dep = expr_eliminate_dups(dep);
 333                                 if (menu->sym && menu->sym->type != S_TRISTATE)
 334                                         dep = expr_trans_bool(dep);
 335                                 prop->visible.expr = dep;
 336                                 if (prop->type == P_SELECT) {
 337                                         struct symbol *es = prop_get_symbol(prop);
 338                                         es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
 339                                                         expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
 340                                 } else if (prop->type == P_IMPLY) {
 341                                         struct symbol *es = prop_get_symbol(prop);
 342                                         es->implied.expr = expr_alloc_or(es->implied.expr,
 343                                                         expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
 344                                 }
 345                         }
 346                 }
 347                 for (menu = parent->list; menu; menu = menu->next)
 348                         menu_finalize(menu);
 349         } else if (sym) {
 350                 basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
 351                 basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
 352                 basedep = expr_eliminate_dups(expr_transform(basedep));
 353                 last_menu = NULL;
 354                 for (menu = parent->next; menu; menu = menu->next) {
 355                         dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
 356                         if (!expr_contains_symbol(dep, sym))
 357                                 break;
 358                         if (expr_depends_symbol(dep, sym))
 359                                 goto next;
 360                         dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
 361                         dep = expr_eliminate_dups(expr_transform(dep));
 362                         dep2 = expr_copy(basedep);
 363                         expr_eliminate_eq(&dep, &dep2);
 364                         expr_free(dep);
 365                         if (!expr_is_yes(dep2)) {
 366                                 expr_free(dep2);
 367                                 break;
 368                         }
 369                         expr_free(dep2);
 370                 next:
 371                         menu_finalize(menu);
 372                         menu->parent = parent;
 373                         last_menu = menu;
 374                 }
 375                 expr_free(basedep);
 376                 if (last_menu) {
 377                         parent->list = parent->next;
 378                         parent->next = last_menu->next;
 379                         last_menu->next = NULL;
 380                 }
 381
 382                 sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
 383         }
 384         for (menu = parent->list; menu; menu = menu->next) {
 385                 if (sym && sym_is_choice(sym) &&
 386                     menu->sym && !sym_is_choice_value(menu->sym)) {
 387                         current_entry = menu;
 388                         menu->sym->flags |= SYMBOL_CHOICEVAL;
 389                         if (!menu->prompt)
 390                                 menu_warn(menu, "choice value must have a prompt");
 391                         for (prop = menu->sym->prop; prop; prop = prop->next) {
 392                                 if (prop->type == P_DEFAULT)
 393                                         prop_warn(prop, "defaults for choice "
 394                                                   "values not supported");
 395                                 if (prop->menu == menu)
 396                                         continue;
 397                                 if (prop->type == P_PROMPT &&
 398                                     prop->menu->parent->sym != sym)
 399                                         prop_warn(prop, "choice value used outside its choice group");
 400                         }
 401                         /* Non-tristate choice values of tristate choices must
 402                          * depend on the choice being set to Y. The choice
 403                          * values' dependencies were propagated to their
 404                          * properties above, so the change here must be re-
 405                          * propagated.
 406                          */
 407                         if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
 408                                 basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
 409                                 menu->dep = expr_alloc_and(basedep, menu->dep);
 410                                 for (prop = menu->sym->prop; prop; prop = prop->next) {
 411                                         if (prop->menu != menu)
 412                                                 continue;
 413                                         prop->visible.expr = expr_alloc_and(expr_copy(basedep),
 414                                                                             prop->visible.expr);
 415                                 }
 416                         }
 417                         menu_add_symbol(P_CHOICE, sym, NULL);
 418                         prop = sym_get_choice_prop(sym);
 419                         for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
 420                                 ;
 421                         *ep = expr_alloc_one(E_LIST, NULL);
 422                         (*ep)->right.sym = menu->sym;
 423                 }
 424                 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
 425                         for (last_menu = menu->list; ; last_menu = last_menu->next) {
 426                                 last_menu->parent = parent;
 427                                 if (!last_menu->next)
 428                                         break;
 429                         }
 430                         last_menu->next = menu->next;
 431                         menu->next = menu->list;
 432                         menu->list = NULL;
 433                 }
 434         }
 435
 436         if (sym && !(sym->flags & SYMBOL_WARNED)) {
 437                 if (sym->type == S_UNKNOWN)
 438                         menu_warn(parent, "config symbol defined without type");
 439
 440                 if (sym_is_choice(sym) && !parent->prompt)
 441                         menu_warn(parent, "choice must have a prompt");
 442
 443                 /* Check properties connected to this symbol */
 444                 sym_check_prop(sym);
 445                 sym->flags |= SYMBOL_WARNED;
 446         }
 447
 448         if (sym && !sym_is_optional(sym) && parent->prompt) {
 449                 sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
 450                                 expr_alloc_and(parent->prompt->visible.expr,
 451                                         expr_alloc_symbol(&symbol_mod)));
 452         }
 453 }
 454
 455 bool menu_has_prompt(struct menu *menu)
 456 {
 457         if (!menu->prompt)
 458                 return false;
 459         return true;
 460 }
 461
 462 /*
 463  * Determine if a menu is empty.
 464  * A menu is considered empty if it contains no or only
 465  * invisible entries.
 466  */
 467 bool menu_is_empty(struct menu *menu)
 468 {
 469         struct menu *child;
 470
 471         for (child = menu->list; child; child = child->next) {
 472                 if (menu_is_visible(child))
 473                         return(false);
 474         }
 475         return(true);
 476 }
 477
 478 bool menu_is_visible(struct menu *menu)
 479 {
 480         struct menu *child;
 481         struct symbol *sym;
 482         tristate visible;
 483
 484         if (!menu->prompt)
 485                 return false;
 486
 487         if (menu->visibility) {
 488                 if (expr_calc_value(menu->visibility) == no)
 489                         return false;
 490         }
 491
 492         sym = menu->sym;
 493         if (sym) {
 494                 sym_calc_value(sym);
 495                 visible = menu->prompt->visible.tri;
 496         } else
 497                 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
 498
 499         if (visible != no)
 500                 return true;
 501
 502         if (!sym || sym_get_tristate_value(menu->sym) == no)
 503                 return false;
 504
 505         for (child = menu->list; child; child = child->next) {
 506                 if (menu_is_visible(child)) {
 507                         if (sym)
 508                                 sym->flags |= SYMBOL_DEF_USER;
 509                         return true;
 510                 }
 511         }
 512
 513         return false;
 514 }
 515
 516 const char *menu_get_prompt(struct menu *menu)
 517 {
 518         if (menu->prompt)
 519                 return menu->prompt->text;
 520         else if (menu->sym)
 521                 return menu->sym->name;
 522         return NULL;
 523 }
 524
 525 struct menu *menu_get_root_menu(struct menu *menu)
 526 {
 527         return &rootmenu;
 528 }
 529
 530 struct menu *menu_get_parent_menu(struct menu *menu)
 531 {
 532         enum prop_type type;
 533
 534         for (; menu != &rootmenu; menu = menu->parent) {
 535                 type = menu->prompt ? menu->prompt->type : 0;
 536                 if (type == P_MENU)
 537                         break;
 538         }
 539         return menu;
 540 }
 541
 542 bool menu_has_help(struct menu *menu)
 543 {
 544         return menu->help != NULL;
 545 }
 546
 547 const char *menu_get_help(struct menu *menu)
 548 {
 549         if (menu->help)
 550                 return menu->help;
 551         else
 552                 return "";
 553 }
 554
 555 static void get_prompt_str(struct gstr *r, struct property *prop,
 556                            struct list_head *head)
 557 {
 558         int i, j;
 559         struct menu *submenu[8], *menu, *location = NULL;
 560         struct jump_key *jump = NULL;
 561
 562         str_printf(r, _("Prompt: %s\n"), _(prop->text));
 563         menu = prop->menu->parent;
 564         for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
 565                 bool accessible = menu_is_visible(menu);
 566
 567                 submenu[i++] = menu;
 568                 if (location == NULL && accessible)
 569                         location = menu;
 570         }
 571         if (head && location) {
 572                 jump = xmalloc(sizeof(struct jump_key));
 573
 574                 if (menu_is_visible(prop->menu)) {
 575                         /*
 576                          * There is not enough room to put the hint at the
 577                          * beginning of the "Prompt" line. Put the hint on the
 578                          * last "Location" line even when it would belong on
 579                          * the former.
 580                          */
 581                         jump->target = prop->menu;
 582                 } else
 583                         jump->target = location;
 584
 585                 if (list_empty(head))
 586                         jump->index = 0;
 587                 else
 588                         jump->index = list_entry(head->prev, struct jump_key,
 589                                                  entries)->index + 1;
 590
 591                 list_add_tail(&jump->entries, head);
 592         }
 593
 594         if (i > 0) {
 595                 str_printf(r, _("  Location:\n"));
 596                 for (j = 4; --i >= 0; j += 2) {
 597                         menu = submenu[i];
 598                         if (jump && menu == location)
 599                                 jump->offset = strlen(r->s);
 600                         str_printf(r, "%*c-> %s", j, ' ',
 601                                    _(menu_get_prompt(menu)));
 602                         if (menu->sym) {
 603                                 str_printf(r, " (%s [=%s])", menu->sym->name ?
 604                                         menu->sym->name : _("<choice>"),
 605                                         sym_get_string_value(menu->sym));
 606                         }
 607                         str_append(r, "\n");
 608                 }
 609         }
 610 }
 611
 612 /*
 613  * get property of type P_SYMBOL
 614  */
 615 static struct property *get_symbol_prop(struct symbol *sym)
 616 {
 617         struct property *prop = NULL;
 618
 619         for_all_properties(sym, prop, P_SYMBOL)
 620                 break;
 621         return prop;
 622 }
 623
 624 static void get_symbol_props_str(struct gstr *r, struct symbol *sym,
 625                                  enum prop_type tok, const char *prefix)
 626 {
 627         bool hit = false;
 628         struct property *prop;
 629
 630         for_all_properties(sym, prop, tok) {
 631                 if (!hit) {
 632                         str_append(r, prefix);
 633                         hit = true;
 634                 } else
 635                         str_printf(r, " && ");
 636                 expr_gstr_print(prop->expr, r);
 637         }
 638         if (hit)
 639                 str_append(r, "\n");
 640 }
 641
 642 /*
 643  * head is optional and may be NULL
 644  */
 645 static void get_symbol_str(struct gstr *r, struct symbol *sym,
 646                     struct list_head *head)
 647 {
 648         struct property *prop;
 649
 650         if (sym && sym->name) {
 651                 str_printf(r, "Symbol: %s [=%s]\n", sym->name,
 652                            sym_get_string_value(sym));
 653                 str_printf(r, "Type  : %s\n", sym_type_name(sym->type));
 654                 if (sym->type == S_INT || sym->type == S_HEX) {
 655                         prop = sym_get_range_prop(sym);
 656                         if (prop) {
 657                                 str_printf(r, "Range : ");
 658                                 expr_gstr_print(prop->expr, r);
 659                                 str_append(r, "\n");
 660                         }
 661                 }
 662         }
 663         for_all_prompts(sym, prop)
 664                 get_prompt_str(r, prop, head);
 665
 666         prop = get_symbol_prop(sym);
 667         if (prop) {
 668                 str_printf(r, _("  Defined at %s:%d\n"), prop->menu->file->name,
 669                         prop->menu->lineno);
 670                 if (!expr_is_yes(prop->visible.expr)) {
 671                         str_append(r, _("  Depends on: "));
 672                         expr_gstr_print(prop->visible.expr, r);
 673                         str_append(r, "\n");
 674                 }
 675         }
 676
 677         get_symbol_props_str(r, sym, P_SELECT, _("  Selects: "));
 678         if (sym->rev_dep.expr) {
 679                 str_append(r, _("  Selected by: "));
 680                 expr_gstr_print(sym->rev_dep.expr, r);
 681                 str_append(r, "\n");
 682         }
 683
 684         get_symbol_props_str(r, sym, P_IMPLY, _("  Implies: "));
 685         if (sym->implied.expr) {
 686                 str_append(r, _("  Implied by: "));
 687                 expr_gstr_print(sym->implied.expr, r);
 688                 str_append(r, "\n");
 689         }
 690
 691         str_append(r, "\n\n");
 692 }
 693
 694 struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
 695 {
 696         struct symbol *sym;
 697         struct gstr res = str_new();
 698         int i;
 699
 700         for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
 701                 get_symbol_str(&res, sym, head);
 702         if (!i)
 703                 str_append(&res, _("No matches found.\n"));
 704         return res;
 705 }
 706
 707
 708 void menu_get_ext_help(struct menu *menu, struct gstr *help)
 709 {
 710         struct symbol *sym = menu->sym;
 711         const char *help_text = nohelp_text;
 712
 713         if (menu_has_help(menu)) {
 714                 if (sym->name)
 715                         str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
 716                 help_text = menu_get_help(menu);
 717         }
 718         str_printf(help, "%s\n", _(help_text));
 719         if (sym)
 720                 get_symbol_str(help, sym, NULL);
 721 }