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 struct menu *menu_add_menu(void)
  66 {
  67         last_entry_ptr = &current_entry->list;
  68         return current_menu = current_entry;
  69 }
  70
  71 void menu_end_menu(void)
  72 {
  73         last_entry_ptr = &current_menu->next;
  74         current_menu = current_menu->parent;
  75 }
  76
  77 /*
  78  * Rewrites 'm' to 'm' && MODULES, so that it evaluates to 'n' when running
  79  * without modules
  80  */
  81 static struct expr *rewrite_m(struct expr *e)
  82 {
  83         if (!e)
  84                 return e;
  85
  86         switch (e->type) {
  87         case E_NOT:
  88                 e->left.expr = rewrite_m(e->left.expr);
  89                 break;
  90         case E_OR:
  91         case E_AND:
  92                 e->left.expr = rewrite_m(e->left.expr);
  93                 e->right.expr = rewrite_m(e->right.expr);
  94                 break;
  95         case E_SYMBOL:
  96                 /* change 'm' into 'm' && MODULES */
  97                 if (e->left.sym == &symbol_mod)
  98                         return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
  99                 break;
 100         default:
 101                 break;
 102         }
 103         return e;
 104 }
 105
 106 void menu_add_dep(struct expr *dep)
 107 {
 108         current_entry->dep = expr_alloc_and(current_entry->dep, dep);
 109 }
 110
 111 void menu_set_type(int type)
 112 {
 113         struct symbol *sym = current_entry->sym;
 114
 115         if (sym->type == type)
 116                 return;
 117         if (sym->type == S_UNKNOWN) {
 118                 sym->type = type;
 119                 return;
 120         }
 121         menu_warn(current_entry,
 122                 "ignoring type redefinition of '%s' from '%s' to '%s'",
 123                 sym->name ? sym->name : "<choice>",
 124                 sym_type_name(sym->type), sym_type_name(type));
 125 }
 126
 127 static struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
 128 {
 129         struct property *prop = prop_alloc(type, current_entry->sym);
 130
 131         prop->menu = current_entry;
 132         prop->expr = expr;
 133         prop->visible.expr = dep;
 134
 135         if (prompt) {
 136                 if (isspace(*prompt)) {
 137                         prop_warn(prop, "leading whitespace ignored");
 138                         while (isspace(*prompt))
 139                                 prompt++;
 140                 }
 141                 if (current_entry->prompt && current_entry != &rootmenu)
 142                         prop_warn(prop, "prompt redefined");
 143
 144                 /* Apply all upper menus' visibilities to actual prompts. */
 145                 if(type == P_PROMPT) {
 146                         struct menu *menu = current_entry;
 147
 148                         while ((menu = menu->parent) != NULL) {
 149                                 struct expr *dup_expr;
 150
 151                                 if (!menu->visibility)
 152                                         continue;
 153                                 /*
 154                                  * Do not add a reference to the
 155                                  * menu's visibility expression but
 156                                  * use a copy of it.  Otherwise the
 157                                  * expression reduction functions
 158                                  * will modify expressions that have
 159                                  * multiple references which can
 160                                  * cause unwanted side effects.
 161                                  */
 162                                 dup_expr = expr_copy(menu->visibility);
 163
 164                                 prop->visible.expr
 165                                         = expr_alloc_and(prop->visible.expr,
 166                                                          dup_expr);
 167                         }
 168                 }
 169
 170                 current_entry->prompt = prop;
 171         }
 172         prop->text = prompt;
 173
 174         return prop;
 175 }
 176
 177 struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
 178 {
 179         return menu_add_prop(type, prompt, NULL, dep);
 180 }
 181
 182 void menu_add_visibility(struct expr *expr)
 183 {
 184         current_entry->visibility = expr_alloc_and(current_entry->visibility,
 185             expr);
 186 }
 187
 188 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
 189 {
 190         menu_add_prop(type, NULL, expr, dep);
 191 }
 192
 193 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
 194 {
 195         menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
 196 }
 197
 198 void menu_add_option(int token, char *arg)
 199 {
 200         switch (token) {
 201         case T_OPT_MODULES:
 202                 if (modules_sym)
 203                         zconf_error("symbol '%s' redefines option 'modules'"
 204                                     " already defined by symbol '%s'",
 205                                     current_entry->sym->name,
 206                                     modules_sym->name
 207                                     );
 208                 modules_sym = current_entry->sym;
 209                 break;
 210         case T_OPT_DEFCONFIG_LIST:
 211                 if (!sym_defconfig_list)
 212                         sym_defconfig_list = current_entry->sym;
 213                 else if (sym_defconfig_list != current_entry->sym)
 214                         zconf_error("trying to redefine defconfig symbol");
 215                 break;
 216         case T_OPT_ENV:
 217                 prop_add_env(arg);
 218                 break;
 219         case T_OPT_ALLNOCONFIG_Y:
 220                 current_entry->sym->flags |= SYMBOL_ALLNOCONFIG_Y;
 221                 break;
 222         }
 223 }
 224
 225 static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
 226 {
 227         return sym2->type == S_INT || sym2->type == S_HEX ||
 228                (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
 229 }
 230
 231 static void sym_check_prop(struct symbol *sym)
 232 {
 233         struct property *prop;
 234         struct symbol *sym2;
 235         char *use;
 236
 237         for (prop = sym->prop; prop; prop = prop->next) {
 238                 switch (prop->type) {
 239                 case P_DEFAULT:
 240                         if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
 241                             prop->expr->type != E_SYMBOL)
 242                                 prop_warn(prop,
 243                                     "default for config symbol '%s'"
 244                                     " must be a single symbol", sym->name);
 245                         if (prop->expr->type != E_SYMBOL)
 246                                 break;
 247                         sym2 = prop_get_symbol(prop);
 248                         if (sym->type == S_HEX || sym->type == S_INT) {
 249                                 if (!menu_validate_number(sym, sym2))
 250                                         prop_warn(prop,
 251                                             "'%s': number is invalid",
 252                                             sym->name);
 253                         }
 254                         if (sym_is_choice(sym)) {
 255                                 struct property *choice_prop =
 256                                         sym_get_choice_prop(sym2);
 257
 258                                 if (!choice_prop ||
 259                                     prop_get_symbol(choice_prop) != sym)
 260                                         prop_warn(prop,
 261                                                   "choice default symbol '%s' is not contained in the choice",
 262                                                   sym2->name);
 263                         }
 264                         break;
 265                 case P_SELECT:
 266                 case P_IMPLY:
 267                         use = prop->type == P_SELECT ? "select" : "imply";
 268                         sym2 = prop_get_symbol(prop);
 269                         if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
 270                                 prop_warn(prop,
 271                                     "config symbol '%s' uses %s, but is "
 272                                     "not boolean or tristate", sym->name, use);
 273                         else if (sym2->type != S_UNKNOWN &&
 274                                  sym2->type != S_BOOLEAN &&
 275                                  sym2->type != S_TRISTATE)
 276                                 prop_warn(prop,
 277                                     "'%s' has wrong type. '%s' only "
 278                                     "accept arguments of boolean and "
 279                                     "tristate type", sym2->name, use);
 280                         break;
 281                 case P_RANGE:
 282                         if (sym->type != S_INT && sym->type != S_HEX)
 283                                 prop_warn(prop, "range is only allowed "
 284                                                 "for int or hex symbols");
 285                         if (!menu_validate_number(sym, prop->expr->left.sym) ||
 286                             !menu_validate_number(sym, prop->expr->right.sym))
 287                                 prop_warn(prop, "range is invalid");
 288                         break;
 289                 default:
 290                         ;
 291                 }
 292         }
 293 }
 294
 295 void menu_finalize(struct menu *parent)
 296 {
 297         struct menu *menu, *last_menu;
 298         struct symbol *sym;
 299         struct property *prop;
 300         struct expr *parentdep, *basedep, *dep, *dep2, **ep;
 301
 302         sym = parent->sym;
 303         if (parent->list) {
 304                 /*
 305                  * This menu node has children. We (recursively) process them
 306                  * and propagate parent dependencies before moving on.
 307                  */
 308
 309                 if (sym && sym_is_choice(sym)) {
 310                         if (sym->type == S_UNKNOWN) {
 311                                 /* find the first choice value to find out choice type */
 312                                 current_entry = parent;
 313                                 for (menu = parent->list; menu; menu = menu->next) {
 314                                         if (menu->sym && menu->sym->type != S_UNKNOWN) {
 315                                                 menu_set_type(menu->sym->type);
 316                                                 break;
 317                                         }
 318                                 }
 319                         }
 320                         /* set the type of the remaining choice values */
 321                         for (menu = parent->list; menu; menu = menu->next) {
 322                                 current_entry = menu;
 323                                 if (menu->sym && menu->sym->type == S_UNKNOWN)
 324                                         menu_set_type(sym->type);
 325                         }
 326                         parentdep = expr_alloc_symbol(sym);
 327                 } else if (parent->prompt)
 328                         parentdep = parent->prompt->visible.expr;
 329                 else
 330                         parentdep = parent->dep;
 331
 332                 /* For each child menu node... */
 333                 for (menu = parent->list; menu; menu = menu->next) {
 334                         /*
 335                          * Propagate parent dependencies to the child menu
 336                          * node, also rewriting and simplifying expressions
 337                          */
 338                         basedep = rewrite_m(menu->dep);
 339                         basedep = expr_transform(basedep);
 340                         basedep = expr_alloc_and(expr_copy(parentdep), basedep);
 341                         basedep = expr_eliminate_dups(basedep);
 342                         menu->dep = basedep;
 343
 344                         if (menu->sym)
 345                                 /*
 346                                  * Note: For symbols, all prompts are included
 347                                  * too in the symbol's own property list
 348                                  */
 349                                 prop = menu->sym->prop;
 350                         else
 351                                 /*
 352                                  * For non-symbol menu nodes, we just need to
 353                                  * handle the prompt
 354                                  */
 355                                 prop = menu->prompt;
 356
 357                         /* For each property... */
 358                         for (; prop; prop = prop->next) {
 359                                 if (prop->menu != menu)
 360                                         /*
 361                                          * Two possibilities:
 362                                          *
 363                                          * 1. The property lacks dependencies
 364                                          *    and so isn't location-specific,
 365                                          *    e.g. an 'option'
 366                                          *
 367                                          * 2. The property belongs to a symbol
 368                                          *    defined in multiple locations and
 369                                          *    is from some other location. It
 370                                          *    will be handled there in that
 371                                          *    case.
 372                                          *
 373                                          * Skip the property.
 374                                          */
 375                                         continue;
 376
 377                                 /*
 378                                  * Propagate parent dependencies to the
 379                                  * property's condition, rewriting and
 380                                  * simplifying expressions at the same time
 381                                  */
 382                                 dep = rewrite_m(prop->visible.expr);
 383                                 dep = expr_transform(dep);
 384                                 dep = expr_alloc_and(expr_copy(basedep), dep);
 385                                 dep = expr_eliminate_dups(dep);
 386                                 if (menu->sym && menu->sym->type != S_TRISTATE)
 387                                         dep = expr_trans_bool(dep);
 388                                 prop->visible.expr = dep;
 389
 390                                 /*
 391                                  * Handle selects and implies, which modify the
 392                                  * dependencies of the selected/implied symbol
 393                                  */
 394                                 if (prop->type == P_SELECT) {
 395                                         struct symbol *es = prop_get_symbol(prop);
 396                                         es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
 397                                                         expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
 398                                 } else if (prop->type == P_IMPLY) {
 399                                         struct symbol *es = prop_get_symbol(prop);
 400                                         es->implied.expr = expr_alloc_or(es->implied.expr,
 401                                                         expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
 402                                 }
 403                         }
 404                 }
 405
 406                 if (sym && sym_is_choice(sym))
 407                         expr_free(parentdep);
 408
 409                 /*
 410                  * Recursively process children in the same fashion before
 411                  * moving on
 412                  */
 413                 for (menu = parent->list; menu; menu = menu->next)
 414                         menu_finalize(menu);
 415         } else if (sym) {
 416                 /*
 417                  * Automatic submenu creation. If sym is a symbol and A, B, C,
 418                  * ... are consecutive items (symbols, menus, ifs, etc.) that
 419                  * all depend on sym, then the following menu structure is
 420                  * created:
 421                  *
 422                  *      sym
 423                  *       +-A
 424                  *       +-B
 425                  *       +-C
 426                  *       ...
 427                  *
 428                  * This also works recursively, giving the following structure
 429                  * if A is a symbol and B depends on A:
 430                  *
 431                  *      sym
 432                  *       +-A
 433                  *       | +-B
 434                  *       +-C
 435                  *       ...
 436                  */
 437
 438                 basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
 439                 basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
 440                 basedep = expr_eliminate_dups(expr_transform(basedep));
 441
 442                 /* Examine consecutive elements after sym */
 443                 last_menu = NULL;
 444                 for (menu = parent->next; menu; menu = menu->next) {
 445                         dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
 446                         if (!expr_contains_symbol(dep, sym))
 447                                 /* No dependency, quit */
 448                                 break;
 449                         if (expr_depends_symbol(dep, sym))
 450                                 /* Absolute dependency, put in submenu */
 451                                 goto next;
 452
 453                         /*
 454                          * Also consider it a dependency on sym if our
 455                          * dependencies contain sym and are a "superset" of
 456                          * sym's dependencies, e.g. '(sym || Q) && R' when sym
 457                          * depends on R.
 458                          *
 459                          * Note that 'R' might be from an enclosing menu or if,
 460                          * making this a more common case than it might seem.
 461                          */
 462                         dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
 463                         dep = expr_eliminate_dups(expr_transform(dep));
 464                         dep2 = expr_copy(basedep);
 465                         expr_eliminate_eq(&dep, &dep2);
 466                         expr_free(dep);
 467                         if (!expr_is_yes(dep2)) {
 468                                 /* Not superset, quit */
 469                                 expr_free(dep2);
 470                                 break;
 471                         }
 472                         /* Superset, put in submenu */
 473                         expr_free(dep2);
 474                 next:
 475                         menu_finalize(menu);
 476                         menu->parent = parent;
 477                         last_menu = menu;
 478                 }
 479                 expr_free(basedep);
 480                 if (last_menu) {
 481                         parent->list = parent->next;
 482                         parent->next = last_menu->next;
 483                         last_menu->next = NULL;
 484                 }
 485
 486                 sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
 487         }
 488         for (menu = parent->list; menu; menu = menu->next) {
 489                 if (sym && sym_is_choice(sym) &&
 490                     menu->sym && !sym_is_choice_value(menu->sym)) {
 491                         current_entry = menu;
 492                         menu->sym->flags |= SYMBOL_CHOICEVAL;
 493                         if (!menu->prompt)
 494                                 menu_warn(menu, "choice value must have a prompt");
 495                         for (prop = menu->sym->prop; prop; prop = prop->next) {
 496                                 if (prop->type == P_DEFAULT)
 497                                         prop_warn(prop, "defaults for choice "
 498                                                   "values not supported");
 499                                 if (prop->menu == menu)
 500                                         continue;
 501                                 if (prop->type == P_PROMPT &&
 502                                     prop->menu->parent->sym != sym)
 503                                         prop_warn(prop, "choice value used outside its choice group");
 504                         }
 505                         /* Non-tristate choice values of tristate choices must
 506                          * depend on the choice being set to Y. The choice
 507                          * values' dependencies were propagated to their
 508                          * properties above, so the change here must be re-
 509                          * propagated.
 510                          */
 511                         if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
 512                                 basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
 513                                 menu->dep = expr_alloc_and(basedep, menu->dep);
 514                                 for (prop = menu->sym->prop; prop; prop = prop->next) {
 515                                         if (prop->menu != menu)
 516                                                 continue;
 517                                         prop->visible.expr = expr_alloc_and(expr_copy(basedep),
 518                                                                             prop->visible.expr);
 519                                 }
 520                         }
 521                         menu_add_symbol(P_CHOICE, sym, NULL);
 522                         prop = sym_get_choice_prop(sym);
 523                         for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
 524                                 ;
 525                         *ep = expr_alloc_one(E_LIST, NULL);
 526                         (*ep)->right.sym = menu->sym;
 527                 }
 528                 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
 529                         for (last_menu = menu->list; ; last_menu = last_menu->next) {
 530                                 last_menu->parent = parent;
 531                                 if (!last_menu->next)
 532                                         break;
 533                         }
 534                         last_menu->next = menu->next;
 535                         menu->next = menu->list;
 536                         menu->list = NULL;
 537                 }
 538         }
 539
 540         if (sym && !(sym->flags & SYMBOL_WARNED)) {
 541                 if (sym->type == S_UNKNOWN)
 542                         menu_warn(parent, "config symbol defined without type");
 543
 544                 if (sym_is_choice(sym) && !parent->prompt)
 545                         menu_warn(parent, "choice must have a prompt");
 546
 547                 /* Check properties connected to this symbol */
 548                 sym_check_prop(sym);
 549                 sym->flags |= SYMBOL_WARNED;
 550         }
 551
 552         if (sym && !sym_is_optional(sym) && parent->prompt) {
 553                 sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
 554                                 expr_alloc_and(parent->prompt->visible.expr,
 555                                         expr_alloc_symbol(&symbol_mod)));
 556         }
 557 }
 558
 559 bool menu_has_prompt(struct menu *menu)
 560 {
 561         if (!menu->prompt)
 562                 return false;
 563         return true;
 564 }
 565
 566 /*
 567  * Determine if a menu is empty.
 568  * A menu is considered empty if it contains no or only
 569  * invisible entries.
 570  */
 571 bool menu_is_empty(struct menu *menu)
 572 {
 573         struct menu *child;
 574
 575         for (child = menu->list; child; child = child->next) {
 576                 if (menu_is_visible(child))
 577                         return(false);
 578         }
 579         return(true);
 580 }
 581
 582 bool menu_is_visible(struct menu *menu)
 583 {
 584         struct menu *child;
 585         struct symbol *sym;
 586         tristate visible;
 587
 588         if (!menu->prompt)
 589                 return false;
 590
 591         if (menu->visibility) {
 592                 if (expr_calc_value(menu->visibility) == no)
 593                         return false;
 594         }
 595
 596         sym = menu->sym;
 597         if (sym) {
 598                 sym_calc_value(sym);
 599                 visible = menu->prompt->visible.tri;
 600         } else
 601                 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
 602
 603         if (visible != no)
 604                 return true;
 605
 606         if (!sym || sym_get_tristate_value(menu->sym) == no)
 607                 return false;
 608
 609         for (child = menu->list; child; child = child->next) {
 610                 if (menu_is_visible(child)) {
 611                         if (sym)
 612                                 sym->flags |= SYMBOL_DEF_USER;
 613                         return true;
 614                 }
 615         }
 616
 617         return false;
 618 }
 619
 620 const char *menu_get_prompt(struct menu *menu)
 621 {
 622         if (menu->prompt)
 623                 return menu->prompt->text;
 624         else if (menu->sym)
 625                 return menu->sym->name;
 626         return NULL;
 627 }
 628
 629 struct menu *menu_get_root_menu(struct menu *menu)
 630 {
 631         return &rootmenu;
 632 }
 633
 634 struct menu *menu_get_parent_menu(struct menu *menu)
 635 {
 636         enum prop_type type;
 637
 638         for (; menu != &rootmenu; menu = menu->parent) {
 639                 type = menu->prompt ? menu->prompt->type : 0;
 640                 if (type == P_MENU)
 641                         break;
 642         }
 643         return menu;
 644 }
 645
 646 bool menu_has_help(struct menu *menu)
 647 {
 648         return menu->help != NULL;
 649 }
 650
 651 const char *menu_get_help(struct menu *menu)
 652 {
 653         if (menu->help)
 654                 return menu->help;
 655         else
 656                 return "";
 657 }
 658
 659 static void get_prompt_str(struct gstr *r, struct property *prop,
 660                            struct list_head *head)
 661 {
 662         int i, j;
 663         struct menu *submenu[8], *menu, *location = NULL;
 664         struct jump_key *jump = NULL;
 665
 666         str_printf(r, _("Prompt: %s\n"), _(prop->text));
 667         menu = prop->menu->parent;
 668         for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
 669                 bool accessible = menu_is_visible(menu);
 670
 671                 submenu[i++] = menu;
 672                 if (location == NULL && accessible)
 673                         location = menu;
 674         }
 675         if (head && location) {
 676                 jump = xmalloc(sizeof(struct jump_key));
 677
 678                 if (menu_is_visible(prop->menu)) {
 679                         /*
 680                          * There is not enough room to put the hint at the
 681                          * beginning of the "Prompt" line. Put the hint on the
 682                          * last "Location" line even when it would belong on
 683                          * the former.
 684                          */
 685                         jump->target = prop->menu;
 686                 } else
 687                         jump->target = location;
 688
 689                 if (list_empty(head))
 690                         jump->index = 0;
 691                 else
 692                         jump->index = list_entry(head->prev, struct jump_key,
 693                                                  entries)->index + 1;
 694
 695                 list_add_tail(&jump->entries, head);
 696         }
 697
 698         if (i > 0) {
 699                 str_printf(r, _("  Location:\n"));
 700                 for (j = 4; --i >= 0; j += 2) {
 701                         menu = submenu[i];
 702                         if (jump && menu == location)
 703                                 jump->offset = strlen(r->s);
 704                         str_printf(r, "%*c-> %s", j, ' ',
 705                                    _(menu_get_prompt(menu)));
 706                         if (menu->sym) {
 707                                 str_printf(r, " (%s [=%s])", menu->sym->name ?
 708                                         menu->sym->name : _("<choice>"),
 709                                         sym_get_string_value(menu->sym));
 710                         }
 711                         str_append(r, "\n");
 712                 }
 713         }
 714 }
 715
 716 /*
 717  * get property of type P_SYMBOL
 718  */
 719 static struct property *get_symbol_prop(struct symbol *sym)
 720 {
 721         struct property *prop = NULL;
 722
 723         for_all_properties(sym, prop, P_SYMBOL)
 724                 break;
 725         return prop;
 726 }
 727
 728 static void get_symbol_props_str(struct gstr *r, struct symbol *sym,
 729                                  enum prop_type tok, const char *prefix)
 730 {
 731         bool hit = false;
 732         struct property *prop;
 733
 734         for_all_properties(sym, prop, tok) {
 735                 if (!hit) {
 736                         str_append(r, prefix);
 737                         hit = true;
 738                 } else
 739                         str_printf(r, " && ");
 740                 expr_gstr_print(prop->expr, r);
 741         }
 742         if (hit)
 743                 str_append(r, "\n");
 744 }
 745
 746 /*
 747  * head is optional and may be NULL
 748  */
 749 static void get_symbol_str(struct gstr *r, struct symbol *sym,
 750                     struct list_head *head)
 751 {
 752         struct property *prop;
 753
 754         if (sym && sym->name) {
 755                 str_printf(r, "Symbol: %s [=%s]\n", sym->name,
 756                            sym_get_string_value(sym));
 757                 str_printf(r, "Type  : %s\n", sym_type_name(sym->type));
 758                 if (sym->type == S_INT || sym->type == S_HEX) {
 759                         prop = sym_get_range_prop(sym);
 760                         if (prop) {
 761                                 str_printf(r, "Range : ");
 762                                 expr_gstr_print(prop->expr, r);
 763                                 str_append(r, "\n");
 764                         }
 765                 }
 766         }
 767         for_all_prompts(sym, prop)
 768                 get_prompt_str(r, prop, head);
 769
 770         prop = get_symbol_prop(sym);
 771         if (prop) {
 772                 str_printf(r, _("  Defined at %s:%d\n"), prop->menu->file->name,
 773                         prop->menu->lineno);
 774                 if (!expr_is_yes(prop->visible.expr)) {
 775                         str_append(r, _("  Depends on: "));
 776                         expr_gstr_print(prop->visible.expr, r);
 777                         str_append(r, "\n");
 778                 }
 779         }
 780
 781         get_symbol_props_str(r, sym, P_SELECT, _("  Selects: "));
 782         if (sym->rev_dep.expr) {
 783                 str_append(r, _("  Selected by: "));
 784                 expr_gstr_print(sym->rev_dep.expr, r);
 785                 str_append(r, "\n");
 786         }
 787
 788         get_symbol_props_str(r, sym, P_IMPLY, _("  Implies: "));
 789         if (sym->implied.expr) {
 790                 str_append(r, _("  Implied by: "));
 791                 expr_gstr_print(sym->implied.expr, r);
 792                 str_append(r, "\n");
 793         }
 794
 795         str_append(r, "\n\n");
 796 }
 797
 798 struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
 799 {
 800         struct symbol *sym;
 801         struct gstr res = str_new();
 802         int i;
 803
 804         for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
 805                 get_symbol_str(&res, sym, head);
 806         if (!i)
 807                 str_append(&res, _("No matches found.\n"));
 808         return res;
 809 }
 810
 811
 812 void menu_get_ext_help(struct menu *menu, struct gstr *help)
 813 {
 814         struct symbol *sym = menu->sym;
 815         const char *help_text = nohelp_text;
 816
 817         if (menu_has_help(menu)) {
 818                 if (sym->name)
 819                         str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
 820                 help_text = menu_get_help(menu);
 821         }
 822         str_printf(help, "%s\n", _(help_text));
 823         if (sym)
 824                 get_symbol_str(help, sym, NULL);
 825 }