config/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 /*
  83  * Rewrites 'm' to 'm' && MODULES, so that it evaluates to 'n' when running
  84  * without modules
  85  */
  86 static struct expr *rewrite_m(struct expr *e)
  87 {
  88         if (!e)
  89                 return e;
  90
  91         switch (e->type) {
  92         case E_NOT:
  93                 e->left.expr = rewrite_m(e->left.expr);
  94                 break;
  95         case E_OR:
  96         case E_AND:
  97                 e->left.expr = rewrite_m(e->left.expr);
  98                 e->right.expr = rewrite_m(e->right.expr);
  99                 break;
 100         case E_SYMBOL:
 101                 /* change 'm' into 'm' && MODULES */
 102                 if (e->left.sym == &symbol_mod)
 103                         return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
 104                 break;
 105         default:
 106                 break;
 107         }
 108         return e;
 109 }
 110
 111 void menu_add_dep(struct expr *dep)
 112 {
 113         current_entry->dep = expr_alloc_and(current_entry->dep, dep);
 114 }
 115
 116 void menu_set_type(int type)
 117 {
 118         struct symbol *sym = current_entry->sym;
 119
 120         if (sym->type == type)
 121                 return;
 122         if (sym->type == S_UNKNOWN) {
 123                 sym->type = type;
 124                 return;
 125         }
 126         menu_warn(current_entry,
 127                 "ignoring type redefinition of '%s' from '%s' to '%s'",
 128                 sym->name ? sym->name : "<choice>",
 129                 sym_type_name(sym->type), sym_type_name(type));
 130 }
 131
 132 static struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
 133 {
 134         struct property *prop = prop_alloc(type, current_entry->sym);
 135
 136         prop->menu = current_entry;
 137         prop->expr = expr;
 138         prop->visible.expr = dep;
 139
 140         if (prompt) {
 141                 if (isspace(*prompt)) {
 142                         prop_warn(prop, "leading whitespace ignored");
 143                         while (isspace(*prompt))
 144                                 prompt++;
 145                 }
 146                 if (current_entry->prompt && current_entry != &rootmenu)
 147                         prop_warn(prop, "prompt redefined");
 148
 149                 /* Apply all upper menus' visibilities to actual prompts. */
 150                 if(type == P_PROMPT) {
 151                         struct menu *menu = current_entry;
 152
 153                         while ((menu = menu->parent) != NULL) {
 154                                 struct expr *dup_expr;
 155
 156                                 if (!menu->visibility)
 157                                         continue;
 158                                 /*
 159                                  * Do not add a reference to the
 160                                  * menu's visibility expression but
 161                                  * use a copy of it.  Otherwise the
 162                                  * expression reduction functions
 163                                  * will modify expressions that have
 164                                  * multiple references which can
 165                                  * cause unwanted side effects.
 166                                  */
 167                                 dup_expr = expr_copy(menu->visibility);
 168
 169                                 prop->visible.expr
 170                                         = expr_alloc_and(prop->visible.expr,
 171                                                          dup_expr);
 172                         }
 173                 }
 174
 175                 current_entry->prompt = prop;
 176         }
 177         prop->text = prompt;
 178
 179         return prop;
 180 }
 181
 182 struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
 183 {
 184         return menu_add_prop(type, prompt, NULL, dep);
 185 }
 186
 187 void menu_add_visibility(struct expr *expr)
 188 {
 189         current_entry->visibility = expr_alloc_and(current_entry->visibility,
 190             expr);
 191 }
 192
 193 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
 194 {
 195         menu_add_prop(type, NULL, expr, dep);
 196 }
 197
 198 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
 199 {
 200         menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
 201 }
 202
 203 void menu_add_option(int token, char *arg)
 204 {
 205         switch (token) {
 206         case T_OPT_MODULES:
 207                 if (modules_sym)
 208                         zconf_error("symbol '%s' redefines option 'modules'"
 209                                     " already defined by symbol '%s'",
 210                                     current_entry->sym->name,
 211                                     modules_sym->name
 212                                     );
 213                 modules_sym = current_entry->sym;
 214                 break;
 215         case T_OPT_DEFCONFIG_LIST:
 216                 if (!sym_defconfig_list)
 217                         sym_defconfig_list = current_entry->sym;
 218                 else if (sym_defconfig_list != current_entry->sym)
 219                         zconf_error("trying to redefine defconfig symbol");
 220                 break;
 221         case T_OPT_ENV:
 222                 prop_add_env(arg);
 223                 break;
 224         case T_OPT_ALLNOCONFIG_Y:
 225                 current_entry->sym->flags |= SYMBOL_ALLNOCONFIG_Y;
 226                 break;
 227         }
 228 }
 229
 230 static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
 231 {
 232         return sym2->type == S_INT || sym2->type == S_HEX ||
 233                (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
 234 }
 235
 236 static void sym_check_prop(struct symbol *sym)
 237 {
 238         struct property *prop;
 239         struct symbol *sym2;
 240         char *use;
 241
 242         for (prop = sym->prop; prop; prop = prop->next) {
 243                 switch (prop->type) {
 244                 case P_DEFAULT:
 245                         if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
 246                             prop->expr->type != E_SYMBOL)
 247                                 prop_warn(prop,
 248                                     "default for config symbol '%s'"
 249                                     " must be a single symbol", sym->name);
 250                         if (prop->expr->type != E_SYMBOL)
 251                                 break;
 252                         sym2 = prop_get_symbol(prop);
 253                         if (sym->type == S_HEX || sym->type == S_INT) {
 254                                 if (!menu_validate_number(sym, sym2))
 255                                         prop_warn(prop,
 256                                             "'%s': number is invalid",
 257                                             sym->name);
 258                         }
 259                         if (sym_is_choice(sym)) {
 260                                 struct property *choice_prop =
 261                                         sym_get_choice_prop(sym2);
 262
 263                                 if (!choice_prop ||
 264                                     prop_get_symbol(choice_prop) != sym)
 265                                         prop_warn(prop,
 266                                                   "choice default symbol '%s' is not contained in the choice",
 267                                                   sym2->name);
 268                         }
 269                         break;
 270                 case P_SELECT:
 271                 case P_IMPLY:
 272                         use = prop->type == P_SELECT ? "select" : "imply";
 273                         sym2 = prop_get_symbol(prop);
 274                         if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
 275                                 prop_warn(prop,
 276                                     "config symbol '%s' uses %s, but is "
 277                                     "not boolean or tristate", sym->name, use);
 278                         else if (sym2->type != S_UNKNOWN &&
 279                                  sym2->type != S_BOOLEAN &&
 280                                  sym2->type != S_TRISTATE)
 281                                 prop_warn(prop,
 282                                     "'%s' has wrong type. '%s' only "
 283                                     "accept arguments of boolean and "
 284                                     "tristate type", sym2->name, use);
 285                         break;
 286                 case P_RANGE:
 287                         if (sym->type != S_INT && sym->type != S_HEX)
 288                                 prop_warn(prop, "range is only allowed "
 289                                                 "for int or hex symbols");
 290                         if (!menu_validate_number(sym, prop->expr->left.sym) ||
 291                             !menu_validate_number(sym, prop->expr->right.sym))
 292                                 prop_warn(prop, "range is invalid");
 293                         break;
 294                 default:
 295                         ;
 296                 }
 297         }
 298 }
 299
 300 void menu_finalize(struct menu *parent)
 301 {
 302         struct menu *menu, *last_menu;
 303         struct symbol *sym;
 304         struct property *prop;
 305         struct expr *parentdep, *basedep, *dep, *dep2, **ep;
 306
 307         sym = parent->sym;
 308         if (parent->list) {
 309                 /*
 310                  * This menu node has children. We (recursively) process them
 311                  * and propagate parent dependencies before moving on.
 312                  */
 313
 314                 if (sym && sym_is_choice(sym)) {
 315                         if (sym->type == S_UNKNOWN) {
 316                                 /* find the first choice value to find out choice type */
 317                                 current_entry = parent;
 318                                 for (menu = parent->list; menu; menu = menu->next) {
 319                                         if (menu->sym && menu->sym->type != S_UNKNOWN) {
 320                                                 menu_set_type(menu->sym->type);
 321                                                 break;
 322                                         }
 323                                 }
 324                         }
 325                         /* set the type of the remaining choice values */
 326                         for (menu = parent->list; menu; menu = menu->next) {
 327                                 current_entry = menu;
 328                                 if (menu->sym && menu->sym->type == S_UNKNOWN)
 329                                         menu_set_type(sym->type);
 330                         }
 331                         parentdep = expr_alloc_symbol(sym);
 332                 } else if (parent->prompt)
 333                         parentdep = parent->prompt->visible.expr;
 334                 else
 335                         parentdep = parent->dep;
 336
 337                 /* For each child menu node... */
 338                 for (menu = parent->list; menu; menu = menu->next) {
 339                         /*
 340                          * Propagate parent dependencies to the child menu
 341                          * node, also rewriting and simplifying expressions
 342                          */
 343                         basedep = rewrite_m(menu->dep);
 344                         basedep = expr_transform(basedep);
 345                         basedep = expr_alloc_and(expr_copy(parentdep), basedep);
 346                         basedep = expr_eliminate_dups(basedep);
 347                         menu->dep = basedep;
 348
 349                         if (menu->sym)
 350                                 /*
 351                                  * Note: For symbols, all prompts are included
 352                                  * too in the symbol's own property list
 353                                  */
 354                                 prop = menu->sym->prop;
 355                         else
 356                                 /*
 357                                  * For non-symbol menu nodes, we just need to
 358                                  * handle the prompt
 359                                  */
 360                                 prop = menu->prompt;
 361
 362                         /* For each property... */
 363                         for (; prop; prop = prop->next) {
 364                                 if (prop->menu != menu)
 365                                         /*
 366                                          * Two possibilities:
 367                                          *
 368                                          * 1. The property lacks dependencies
 369                                          *    and so isn't location-specific,
 370                                          *    e.g. an 'option'
 371                                          *
 372                                          * 2. The property belongs to a symbol
 373                                          *    defined in multiple locations and
 374                                          *    is from some other location. It
 375                                          *    will be handled there in that
 376                                          *    case.
 377                                          *
 378                                          * Skip the property.
 379                                          */
 380                                         continue;
 381
 382                                 /*
 383                                  * Propagate parent dependencies to the
 384                                  * property's condition, rewriting and
 385                                  * simplifying expressions at the same time
 386                                  */
 387                                 dep = rewrite_m(prop->visible.expr);
 388                                 dep = expr_transform(dep);
 389                                 dep = expr_alloc_and(expr_copy(basedep), dep);
 390                                 dep = expr_eliminate_dups(dep);
 391                                 if (menu->sym && menu->sym->type != S_TRISTATE)
 392                                         dep = expr_trans_bool(dep);
 393                                 prop->visible.expr = dep;
 394
 395                                 /*
 396                                  * Handle selects and implies, which modify the
 397                                  * dependencies of the selected/implied symbol
 398                                  */
 399                                 if (prop->type == P_SELECT) {
 400                                         struct symbol *es = prop_get_symbol(prop);
 401                                         es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
 402                                                         expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
 403                                 } else if (prop->type == P_IMPLY) {
 404                                         struct symbol *es = prop_get_symbol(prop);
 405                                         es->implied.expr = expr_alloc_or(es->implied.expr,
 406                                                         expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
 407                                 }
 408                         }
 409                 }
 410
 411                 if (sym && sym_is_choice(sym))
 412                         expr_free(parentdep);
 413
 414                 /*
 415                  * Recursively process children in the same fashion before
 416                  * moving on
 417                  */
 418                 for (menu = parent->list; menu; menu = menu->next)
 419                         menu_finalize(menu);
 420         } else if (sym) {
 421                 /*
 422                  * Automatic submenu creation. If sym is a symbol and A, B, C,
 423                  * ... are consecutive items (symbols, menus, ifs, etc.) that
 424                  * all depend on sym, then the following menu structure is
 425                  * created:
 426                  *
 427                  *      sym
 428                  *       +-A
 429                  *       +-B
 430                  *       +-C
 431                  *       ...
 432                  *
 433                  * This also works recursively, giving the following structure
 434                  * if A is a symbol and B depends on A:
 435                  *
 436                  *      sym
 437                  *       +-A
 438                  *       | +-B
 439                  *       +-C
 440                  *       ...
 441                  */
 442
 443                 basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
 444                 basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
 445                 basedep = expr_eliminate_dups(expr_transform(basedep));
 446
 447                 /* Examine consecutive elements after sym */
 448                 last_menu = NULL;
 449                 for (menu = parent->next; menu; menu = menu->next) {
 450                         dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
 451                         if (!expr_contains_symbol(dep, sym))
 452                                 /* No dependency, quit */
 453                                 break;
 454                         if (expr_depends_symbol(dep, sym))
 455                                 /* Absolute dependency, put in submenu */
 456                                 goto next;
 457
 458                         /*
 459                          * Also consider it a dependency on sym if our
 460                          * dependencies contain sym and are a "superset" of
 461                          * sym's dependencies, e.g. '(sym || Q) && R' when sym
 462                          * depends on R.
 463                          *
 464                          * Note that 'R' might be from an enclosing menu or if,
 465                          * making this a more common case than it might seem.
 466                          */
 467                         dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
 468                         dep = expr_eliminate_dups(expr_transform(dep));
 469                         dep2 = expr_copy(basedep);
 470                         expr_eliminate_eq(&dep, &dep2);
 471                         expr_free(dep);
 472                         if (!expr_is_yes(dep2)) {
 473                                 /* Not superset, quit */
 474                                 expr_free(dep2);
 475                                 break;
 476                         }
 477                         /* Superset, put in submenu */
 478                         expr_free(dep2);
 479                 next:
 480                         menu_finalize(menu);
 481                         menu->parent = parent;
 482                         last_menu = menu;
 483                 }
 484                 expr_free(basedep);
 485                 if (last_menu) {
 486                         parent->list = parent->next;
 487                         parent->next = last_menu->next;
 488                         last_menu->next = NULL;
 489                 }
 490
 491                 sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
 492         }
 493         for (menu = parent->list; menu; menu = menu->next) {
 494                 if (sym && sym_is_choice(sym) &&
 495                     menu->sym && !sym_is_choice_value(menu->sym)) {
 496                         current_entry = menu;
 497                         menu->sym->flags |= SYMBOL_CHOICEVAL;
 498                         if (!menu->prompt)
 499                                 menu_warn(menu, "choice value must have a prompt");
 500                         for (prop = menu->sym->prop; prop; prop = prop->next) {
 501                                 if (prop->type == P_DEFAULT)
 502                                         prop_warn(prop, "defaults for choice "
 503                                                   "values not supported");
 504                                 if (prop->menu == menu)
 505                                         continue;
 506                                 if (prop->type == P_PROMPT &&
 507                                     prop->menu->parent->sym != sym)
 508                                         prop_warn(prop, "choice value used outside its choice group");
 509                         }
 510                         /* Non-tristate choice values of tristate choices must
 511                          * depend on the choice being set to Y. The choice
 512                          * values' dependencies were propagated to their
 513                          * properties above, so the change here must be re-
 514                          * propagated.
 515                          */
 516                         if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
 517                                 basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
 518                                 menu->dep = expr_alloc_and(basedep, menu->dep);
 519                                 for (prop = menu->sym->prop; prop; prop = prop->next) {
 520                                         if (prop->menu != menu)
 521                                                 continue;
 522                                         prop->visible.expr = expr_alloc_and(expr_copy(basedep),
 523                                                                             prop->visible.expr);
 524                                 }
 525                         }
 526                         menu_add_symbol(P_CHOICE, sym, NULL);
 527                         prop = sym_get_choice_prop(sym);
 528                         for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
 529                                 ;
 530                         *ep = expr_alloc_one(E_LIST, NULL);
 531                         (*ep)->right.sym = menu->sym;
 532                 }
 533                 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
 534                         for (last_menu = menu->list; ; last_menu = last_menu->next) {
 535                                 last_menu->parent = parent;
 536                                 if (!last_menu->next)
 537                                         break;
 538                         }
 539                         last_menu->next = menu->next;
 540                         menu->next = menu->list;
 541                         menu->list = NULL;
 542                 }
 543         }
 544
 545         if (sym && !(sym->flags & SYMBOL_WARNED)) {
 546                 if (sym->type == S_UNKNOWN)
 547                         menu_warn(parent, "config symbol defined without type");
 548
 549                 if (sym_is_choice(sym) && !parent->prompt)
 550                         menu_warn(parent, "choice must have a prompt");
 551
 552                 /* Check properties connected to this symbol */
 553                 sym_check_prop(sym);
 554                 sym->flags |= SYMBOL_WARNED;
 555         }
 556
 557         if (sym && !sym_is_optional(sym) && parent->prompt) {
 558                 sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
 559                                 expr_alloc_and(parent->prompt->visible.expr,
 560                                         expr_alloc_symbol(&symbol_mod)));
 561         }
 562 }
 563
 564 bool menu_has_prompt(struct menu *menu)
 565 {
 566         if (!menu->prompt)
 567                 return false;
 568         return true;
 569 }
 570
 571 /*
 572  * Determine if a menu is empty.
 573  * A menu is considered empty if it contains no or only
 574  * invisible entries.
 575  */
 576 bool menu_is_empty(struct menu *menu)
 577 {
 578         struct menu *child;
 579
 580         for (child = menu->list; child; child = child->next) {
 581                 if (menu_is_visible(child))
 582                         return(false);
 583         }
 584         return(true);
 585 }
 586
 587 bool menu_is_visible(struct menu *menu)
 588 {
 589         struct menu *child;
 590         struct symbol *sym;
 591         tristate visible;
 592
 593         if (!menu->prompt)
 594                 return false;
 595
 596         if (menu->visibility) {
 597                 if (expr_calc_value(menu->visibility) == no)
 598                         return false;
 599         }
 600
 601         sym = menu->sym;
 602         if (sym) {
 603                 sym_calc_value(sym);
 604                 visible = menu->prompt->visible.tri;
 605         } else
 606                 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
 607
 608         if (visible != no)
 609                 return true;
 610
 611         if (!sym || sym_get_tristate_value(menu->sym) == no)
 612                 return false;
 613
 614         for (child = menu->list; child; child = child->next) {
 615                 if (menu_is_visible(child)) {
 616                         if (sym)
 617                                 sym->flags |= SYMBOL_DEF_USER;
 618                         return true;
 619                 }
 620         }
 621
 622         return false;
 623 }
 624
 625 const char *menu_get_prompt(struct menu *menu)
 626 {
 627         if (menu->prompt)
 628                 return menu->prompt->text;
 629         else if (menu->sym)
 630                 return menu->sym->name;
 631         return NULL;
 632 }
 633
 634 struct menu *menu_get_root_menu(struct menu *menu)
 635 {
 636         return &rootmenu;
 637 }
 638
 639 struct menu *menu_get_parent_menu(struct menu *menu)
 640 {
 641         enum prop_type type;
 642
 643         for (; menu != &rootmenu; menu = menu->parent) {
 644                 type = menu->prompt ? menu->prompt->type : 0;
 645                 if (type == P_MENU)
 646                         break;
 647         }
 648         return menu;
 649 }
 650
 651 bool menu_has_help(struct menu *menu)
 652 {
 653         return menu->help != NULL;
 654 }
 655
 656 const char *menu_get_help(struct menu *menu)
 657 {
 658         if (menu->help)
 659                 return menu->help;
 660         else
 661                 return "";
 662 }
 663
 664 static void get_prompt_str(struct gstr *r, struct property *prop,
 665                            struct list_head *head)
 666 {
 667         int i, j;
 668         struct menu *submenu[8], *menu, *location = NULL;
 669         struct jump_key *jump = NULL;
 670
 671         str_printf(r, _("Prompt: %s\n"), _(prop->text));
 672         menu = prop->menu->parent;
 673         for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
 674                 bool accessible = menu_is_visible(menu);
 675
 676                 submenu[i++] = menu;
 677                 if (location == NULL && accessible)
 678                         location = menu;
 679         }
 680         if (head && location) {
 681                 jump = xmalloc(sizeof(struct jump_key));
 682
 683                 if (menu_is_visible(prop->menu)) {
 684                         /*
 685                          * There is not enough room to put the hint at the
 686                          * beginning of the "Prompt" line. Put the hint on the
 687                          * last "Location" line even when it would belong on
 688                          * the former.
 689                          */
 690                         jump->target = prop->menu;
 691                 } else
 692                         jump->target = location;
 693
 694                 if (list_empty(head))
 695                         jump->index = 0;
 696                 else
 697                         jump->index = list_entry(head->prev, struct jump_key,
 698                                                  entries)->index + 1;
 699
 700                 list_add_tail(&jump->entries, head);
 701         }
 702
 703         if (i > 0) {
 704                 str_printf(r, _("  Location:\n"));
 705                 for (j = 4; --i >= 0; j += 2) {
 706                         menu = submenu[i];
 707                         if (jump && menu == location)
 708                                 jump->offset = strlen(r->s);
 709                         str_printf(r, "%*c-> %s", j, ' ',
 710                                    _(menu_get_prompt(menu)));
 711                         if (menu->sym) {
 712                                 str_printf(r, " (%s [=%s])", menu->sym->name ?
 713                                         menu->sym->name : _("<choice>"),
 714                                         sym_get_string_value(menu->sym));
 715                         }
 716                         str_append(r, "\n");
 717                 }
 718         }
 719 }
 720
 721 /*
 722  * get property of type P_SYMBOL
 723  */
 724 static struct property *get_symbol_prop(struct symbol *sym)
 725 {
 726         struct property *prop = NULL;
 727
 728         for_all_properties(sym, prop, P_SYMBOL)
 729                 break;
 730         return prop;
 731 }
 732
 733 static void get_symbol_props_str(struct gstr *r, struct symbol *sym,
 734                                  enum prop_type tok, const char *prefix)
 735 {
 736         bool hit = false;
 737         struct property *prop;
 738
 739         for_all_properties(sym, prop, tok) {
 740                 if (!hit) {
 741                         str_append(r, prefix);
 742                         hit = true;
 743                 } else
 744                         str_printf(r, " && ");
 745                 expr_gstr_print(prop->expr, r);
 746         }
 747         if (hit)
 748                 str_append(r, "\n");
 749 }
 750
 751 /*
 752  * head is optional and may be NULL
 753  */
 754 static void get_symbol_str(struct gstr *r, struct symbol *sym,
 755                     struct list_head *head)
 756 {
 757         struct property *prop;
 758
 759         if (sym && sym->name) {
 760                 str_printf(r, "Symbol: %s [=%s]\n", sym->name,
 761                            sym_get_string_value(sym));
 762                 str_printf(r, "Type  : %s\n", sym_type_name(sym->type));
 763                 if (sym->type == S_INT || sym->type == S_HEX) {
 764                         prop = sym_get_range_prop(sym);
 765                         if (prop) {
 766                                 str_printf(r, "Range : ");
 767                                 expr_gstr_print(prop->expr, r);
 768                                 str_append(r, "\n");
 769                         }
 770                 }
 771         }
 772         for_all_prompts(sym, prop)
 773                 get_prompt_str(r, prop, head);
 774
 775         prop = get_symbol_prop(sym);
 776         if (prop) {
 777                 str_printf(r, _("  Defined at %s:%d\n"), prop->menu->file->name,
 778                         prop->menu->lineno);
 779                 if (!expr_is_yes(prop->visible.expr)) {
 780                         str_append(r, _("  Depends on: "));
 781                         expr_gstr_print(prop->visible.expr, r);
 782                         str_append(r, "\n");
 783                 }
 784         }
 785
 786         get_symbol_props_str(r, sym, P_SELECT, _("  Selects: "));
 787         if (sym->rev_dep.expr) {
 788                 str_append(r, _("  Selected by: "));
 789                 expr_gstr_print(sym->rev_dep.expr, r);
 790                 str_append(r, "\n");
 791         }
 792
 793         get_symbol_props_str(r, sym, P_IMPLY, _("  Implies: "));
 794         if (sym->implied.expr) {
 795                 str_append(r, _("  Implied by: "));
 796                 expr_gstr_print(sym->implied.expr, r);
 797                 str_append(r, "\n");
 798         }
 799
 800         str_append(r, "\n\n");
 801 }
 802
 803 struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
 804 {
 805         struct symbol *sym;
 806         struct gstr res = str_new();
 807         int i;
 808
 809         for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
 810                 get_symbol_str(&res, sym, head);
 811         if (!i)
 812                 str_append(&res, _("No matches found.\n"));
 813         return res;
 814 }
 815
 816
 817 void menu_get_ext_help(struct menu *menu, struct gstr *help)
 818 {
 819         struct symbol *sym = menu->sym;
 820         const char *help_text = nohelp_text;
 821
 822         if (menu_has_help(menu)) {
 823                 if (sym->name)
 824                         str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
 825                 help_text = menu_get_help(menu);
 826         }
 827         str_printf(help, "%s\n", _(help_text));
 828         if (sym)
 829                 get_symbol_str(help, sym, NULL);
 830 }