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 <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                 if (last_menu) {
 376                         parent->list = parent->next;
 377                         parent->next = last_menu->next;
 378                         last_menu->next = NULL;
 379                 }
 380
 381                 sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
 382         }
 383         for (menu = parent->list; menu; menu = menu->next) {
 384                 if (sym && sym_is_choice(sym) &&
 385                     menu->sym && !sym_is_choice_value(menu->sym)) {
 386                         current_entry = menu;
 387                         menu->sym->flags |= SYMBOL_CHOICEVAL;
 388                         if (!menu->prompt)
 389                                 menu_warn(menu, "choice value must have a prompt");
 390                         for (prop = menu->sym->prop; prop; prop = prop->next) {
 391                                 if (prop->type == P_DEFAULT)
 392                                         prop_warn(prop, "defaults for choice "
 393                                                   "values not supported");
 394                                 if (prop->menu == menu)
 395                                         continue;
 396                                 if (prop->type == P_PROMPT &&
 397                                     prop->menu->parent->sym != sym)
 398                                         prop_warn(prop, "choice value used outside its choice group");
 399                         }
 400                         /* Non-tristate choice values of tristate choices must
 401                          * depend on the choice being set to Y. The choice
 402                          * values' dependencies were propagated to their
 403                          * properties above, so the change here must be re-
 404                          * propagated.
 405                          */
 406                         if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
 407                                 basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
 408                                 menu->dep = expr_alloc_and(basedep, menu->dep);
 409                                 for (prop = menu->sym->prop; prop; prop = prop->next) {
 410                                         if (prop->menu != menu)
 411                                                 continue;
 412                                         prop->visible.expr = expr_alloc_and(expr_copy(basedep),
 413                                                                             prop->visible.expr);
 414                                 }
 415                         }
 416                         menu_add_symbol(P_CHOICE, sym, NULL);
 417                         prop = sym_get_choice_prop(sym);
 418                         for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
 419                                 ;
 420                         *ep = expr_alloc_one(E_LIST, NULL);
 421                         (*ep)->right.sym = menu->sym;
 422                 }
 423                 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
 424                         for (last_menu = menu->list; ; last_menu = last_menu->next) {
 425                                 last_menu->parent = parent;
 426                                 if (!last_menu->next)
 427                                         break;
 428                         }
 429                         last_menu->next = menu->next;
 430                         menu->next = menu->list;
 431                         menu->list = NULL;
 432                 }
 433         }
 434
 435         if (sym && !(sym->flags & SYMBOL_WARNED)) {
 436                 if (sym->type == S_UNKNOWN)
 437                         menu_warn(parent, "config symbol defined without type");
 438
 439                 if (sym_is_choice(sym) && !parent->prompt)
 440                         menu_warn(parent, "choice must have a prompt");
 441
 442                 /* Check properties connected to this symbol */
 443                 sym_check_prop(sym);
 444                 sym->flags |= SYMBOL_WARNED;
 445         }
 446
 447         if (sym && !sym_is_optional(sym) && parent->prompt) {
 448                 sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
 449                                 expr_alloc_and(parent->prompt->visible.expr,
 450                                         expr_alloc_symbol(&symbol_mod)));
 451         }
 452 }
 453
 454 bool menu_has_prompt(struct menu *menu)
 455 {
 456         if (!menu->prompt)
 457                 return false;
 458         return true;
 459 }
 460
 461 /*
 462  * Determine if a menu is empty.
 463  * A menu is considered empty if it contains no or only
 464  * invisible entries.
 465  */
 466 bool menu_is_empty(struct menu *menu)
 467 {
 468         struct menu *child;
 469
 470         for (child = menu->list; child; child = child->next) {
 471                 if (menu_is_visible(child))
 472                         return(false);
 473         }
 474         return(true);
 475 }
 476
 477 bool menu_is_visible(struct menu *menu)
 478 {
 479         struct menu *child;
 480         struct symbol *sym;
 481         tristate visible;
 482
 483         if (!menu->prompt)
 484                 return false;
 485
 486         if (menu->visibility) {
 487                 if (expr_calc_value(menu->visibility) == no)
 488                         return false;
 489         }
 490
 491         sym = menu->sym;
 492         if (sym) {
 493                 sym_calc_value(sym);
 494                 visible = menu->prompt->visible.tri;
 495         } else
 496                 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
 497
 498         if (visible != no)
 499                 return true;
 500
 501         if (!sym || sym_get_tristate_value(menu->sym) == no)
 502                 return false;
 503
 504         for (child = menu->list; child; child = child->next) {
 505                 if (menu_is_visible(child)) {
 506                         if (sym)
 507                                 sym->flags |= SYMBOL_DEF_USER;
 508                         return true;
 509                 }
 510         }
 511
 512         return false;
 513 }
 514
 515 const char *menu_get_prompt(struct menu *menu)
 516 {
 517         if (menu->prompt)
 518                 return menu->prompt->text;
 519         else if (menu->sym)
 520                 return menu->sym->name;
 521         return NULL;
 522 }
 523
 524 struct menu *menu_get_root_menu(struct menu *menu)
 525 {
 526         return &rootmenu;
 527 }
 528
 529 struct menu *menu_get_parent_menu(struct menu *menu)
 530 {
 531         enum prop_type type;
 532
 533         for (; menu != &rootmenu; menu = menu->parent) {
 534                 type = menu->prompt ? menu->prompt->type : 0;
 535                 if (type == P_MENU)
 536                         break;
 537         }
 538         return menu;
 539 }
 540
 541 bool menu_has_help(struct menu *menu)
 542 {
 543         return menu->help != NULL;
 544 }
 545
 546 const char *menu_get_help(struct menu *menu)
 547 {
 548         if (menu->help)
 549                 return menu->help;
 550         else
 551                 return "";
 552 }
 553
 554 static void get_prompt_str(struct gstr *r, struct property *prop,
 555                            struct list_head *head)
 556 {
 557         int i, j;
 558         struct menu *submenu[8], *menu, *location = NULL;
 559         struct jump_key *jump = NULL;
 560
 561         str_printf(r, _("Prompt: %s\n"), _(prop->text));
 562         menu = prop->menu->parent;
 563         for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
 564                 bool accessible = menu_is_visible(menu);
 565
 566                 submenu[i++] = menu;
 567                 if (location == NULL && accessible)
 568                         location = menu;
 569         }
 570         if (head && location) {
 571                 jump = xmalloc(sizeof(struct jump_key));
 572
 573                 if (menu_is_visible(prop->menu)) {
 574                         /*
 575                          * There is not enough room to put the hint at the
 576                          * beginning of the "Prompt" line. Put the hint on the
 577                          * last "Location" line even when it would belong on
 578                          * the former.
 579                          */
 580                         jump->target = prop->menu;
 581                 } else
 582                         jump->target = location;
 583
 584                 if (list_empty(head))
 585                         jump->index = 0;
 586                 else
 587                         jump->index = list_entry(head->prev, struct jump_key,
 588                                                  entries)->index + 1;
 589
 590                 list_add_tail(&jump->entries, head);
 591         }
 592
 593         if (i > 0) {
 594                 str_printf(r, _("  Location:\n"));
 595                 for (j = 4; --i >= 0; j += 2) {
 596                         menu = submenu[i];
 597                         if (jump && menu == location)
 598                                 jump->offset = strlen(r->s);
 599                         str_printf(r, "%*c-> %s", j, ' ',
 600                                    _(menu_get_prompt(menu)));
 601                         if (menu->sym) {
 602                                 str_printf(r, " (%s [=%s])", menu->sym->name ?
 603                                         menu->sym->name : _("<choice>"),
 604                                         sym_get_string_value(menu->sym));
 605                         }
 606                         str_append(r, "\n");
 607                 }
 608         }
 609 }
 610
 611 /*
 612  * get property of type P_SYMBOL
 613  */
 614 static struct property *get_symbol_prop(struct symbol *sym)
 615 {
 616         struct property *prop = NULL;
 617
 618         for_all_properties(sym, prop, P_SYMBOL)
 619                 break;
 620         return prop;
 621 }
 622
 623 static void get_symbol_props_str(struct gstr *r, struct symbol *sym,
 624                                  enum prop_type tok, const char *prefix)
 625 {
 626         bool hit = false;
 627         struct property *prop;
 628
 629         for_all_properties(sym, prop, tok) {
 630                 if (!hit) {
 631                         str_append(r, prefix);
 632                         hit = true;
 633                 } else
 634                         str_printf(r, " && ");
 635                 expr_gstr_print(prop->expr, r);
 636         }
 637         if (hit)
 638                 str_append(r, "\n");
 639 }
 640
 641 /*
 642  * head is optional and may be NULL
 643  */
 644 static void get_symbol_str(struct gstr *r, struct symbol *sym,
 645                     struct list_head *head)
 646 {
 647         struct property *prop;
 648
 649         if (sym && sym->name) {
 650                 str_printf(r, "Symbol: %s [=%s]\n", sym->name,
 651                            sym_get_string_value(sym));
 652                 str_printf(r, "Type  : %s\n", sym_type_name(sym->type));
 653                 if (sym->type == S_INT || sym->type == S_HEX) {
 654                         prop = sym_get_range_prop(sym);
 655                         if (prop) {
 656                                 str_printf(r, "Range : ");
 657                                 expr_gstr_print(prop->expr, r);
 658                                 str_append(r, "\n");
 659                         }
 660                 }
 661         }
 662         for_all_prompts(sym, prop)
 663                 get_prompt_str(r, prop, head);
 664
 665         prop = get_symbol_prop(sym);
 666         if (prop) {
 667                 str_printf(r, _("  Defined at %s:%d\n"), prop->menu->file->name,
 668                         prop->menu->lineno);
 669                 if (!expr_is_yes(prop->visible.expr)) {
 670                         str_append(r, _("  Depends on: "));
 671                         expr_gstr_print(prop->visible.expr, r);
 672                         str_append(r, "\n");
 673                 }
 674         }
 675
 676         get_symbol_props_str(r, sym, P_SELECT, _("  Selects: "));
 677         if (sym->rev_dep.expr) {
 678                 str_append(r, _("  Selected by: "));
 679                 expr_gstr_print(sym->rev_dep.expr, r);
 680                 str_append(r, "\n");
 681         }
 682
 683         get_symbol_props_str(r, sym, P_IMPLY, _("  Implies: "));
 684         if (sym->implied.expr) {
 685                 str_append(r, _("  Implied by: "));
 686                 expr_gstr_print(sym->implied.expr, r);
 687                 str_append(r, "\n");
 688         }
 689
 690         str_append(r, "\n\n");
 691 }
 692
 693 struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
 694 {
 695         struct symbol *sym;
 696         struct gstr res = str_new();
 697         int i;
 698
 699         for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
 700                 get_symbol_str(&res, sym, head);
 701         if (!i)
 702                 str_append(&res, _("No matches found.\n"));
 703         return res;
 704 }
 705
 706
 707 void menu_get_ext_help(struct menu *menu, struct gstr *help)
 708 {
 709         struct symbol *sym = menu->sym;
 710         const char *help_text = nohelp_text;
 711
 712         if (menu_has_help(menu)) {
 713                 if (sym->name)
 714                         str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
 715                 help_text = menu_get_help(menu);
 716         }
 717         str_printf(help, "%s\n", _(help_text));
 718         if (sym)
 719                 get_symbol_str(help, sym, NULL);
 720 }