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                 /*
 412                  * Recursively process children in the same fashion before
 413                  * moving on
 414                  */
 415                 for (menu = parent->list; menu; menu = menu->next)
 416                         menu_finalize(menu);
 417         } else if (sym) {
 418                 basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
 419                 basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
 420                 basedep = expr_eliminate_dups(expr_transform(basedep));
 421                 last_menu = NULL;
 422                 for (menu = parent->next; menu; menu = menu->next) {
 423                         dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
 424                         if (!expr_contains_symbol(dep, sym))
 425                                 break;
 426                         if (expr_depends_symbol(dep, sym))
 427                                 goto next;
 428                         dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
 429                         dep = expr_eliminate_dups(expr_transform(dep));
 430                         dep2 = expr_copy(basedep);
 431                         expr_eliminate_eq(&dep, &dep2);
 432                         expr_free(dep);
 433                         if (!expr_is_yes(dep2)) {
 434                                 expr_free(dep2);
 435                                 break;
 436                         }
 437                         expr_free(dep2);
 438                 next:
 439                         menu_finalize(menu);
 440                         menu->parent = parent;
 441                         last_menu = menu;
 442                 }
 443                 if (last_menu) {
 444                         parent->list = parent->next;
 445                         parent->next = last_menu->next;
 446                         last_menu->next = NULL;
 447                 }
 448
 449                 sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
 450         }
 451         for (menu = parent->list; menu; menu = menu->next) {
 452                 if (sym && sym_is_choice(sym) &&
 453                     menu->sym && !sym_is_choice_value(menu->sym)) {
 454                         current_entry = menu;
 455                         menu->sym->flags |= SYMBOL_CHOICEVAL;
 456                         if (!menu->prompt)
 457                                 menu_warn(menu, "choice value must have a prompt");
 458                         for (prop = menu->sym->prop; prop; prop = prop->next) {
 459                                 if (prop->type == P_DEFAULT)
 460                                         prop_warn(prop, "defaults for choice "
 461                                                   "values not supported");
 462                                 if (prop->menu == menu)
 463                                         continue;
 464                                 if (prop->type == P_PROMPT &&
 465                                     prop->menu->parent->sym != sym)
 466                                         prop_warn(prop, "choice value used outside its choice group");
 467                         }
 468                         /* Non-tristate choice values of tristate choices must
 469                          * depend on the choice being set to Y. The choice
 470                          * values' dependencies were propagated to their
 471                          * properties above, so the change here must be re-
 472                          * propagated.
 473                          */
 474                         if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
 475                                 basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
 476                                 menu->dep = expr_alloc_and(basedep, menu->dep);
 477                                 for (prop = menu->sym->prop; prop; prop = prop->next) {
 478                                         if (prop->menu != menu)
 479                                                 continue;
 480                                         prop->visible.expr = expr_alloc_and(expr_copy(basedep),
 481                                                                             prop->visible.expr);
 482                                 }
 483                         }
 484                         menu_add_symbol(P_CHOICE, sym, NULL);
 485                         prop = sym_get_choice_prop(sym);
 486                         for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
 487                                 ;
 488                         *ep = expr_alloc_one(E_LIST, NULL);
 489                         (*ep)->right.sym = menu->sym;
 490                 }
 491                 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
 492                         for (last_menu = menu->list; ; last_menu = last_menu->next) {
 493                                 last_menu->parent = parent;
 494                                 if (!last_menu->next)
 495                                         break;
 496                         }
 497                         last_menu->next = menu->next;
 498                         menu->next = menu->list;
 499                         menu->list = NULL;
 500                 }
 501         }
 502
 503         if (sym && !(sym->flags & SYMBOL_WARNED)) {
 504                 if (sym->type == S_UNKNOWN)
 505                         menu_warn(parent, "config symbol defined without type");
 506
 507                 if (sym_is_choice(sym) && !parent->prompt)
 508                         menu_warn(parent, "choice must have a prompt");
 509
 510                 /* Check properties connected to this symbol */
 511                 sym_check_prop(sym);
 512                 sym->flags |= SYMBOL_WARNED;
 513         }
 514
 515         if (sym && !sym_is_optional(sym) && parent->prompt) {
 516                 sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
 517                                 expr_alloc_and(parent->prompt->visible.expr,
 518                                         expr_alloc_symbol(&symbol_mod)));
 519         }
 520 }
 521
 522 bool menu_has_prompt(struct menu *menu)
 523 {
 524         if (!menu->prompt)
 525                 return false;
 526         return true;
 527 }
 528
 529 /*
 530  * Determine if a menu is empty.
 531  * A menu is considered empty if it contains no or only
 532  * invisible entries.
 533  */
 534 bool menu_is_empty(struct menu *menu)
 535 {
 536         struct menu *child;
 537
 538         for (child = menu->list; child; child = child->next) {
 539                 if (menu_is_visible(child))
 540                         return(false);
 541         }
 542         return(true);
 543 }
 544
 545 bool menu_is_visible(struct menu *menu)
 546 {
 547         struct menu *child;
 548         struct symbol *sym;
 549         tristate visible;
 550
 551         if (!menu->prompt)
 552                 return false;
 553
 554         if (menu->visibility) {
 555                 if (expr_calc_value(menu->visibility) == no)
 556                         return false;
 557         }
 558
 559         sym = menu->sym;
 560         if (sym) {
 561                 sym_calc_value(sym);
 562                 visible = menu->prompt->visible.tri;
 563         } else
 564                 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
 565
 566         if (visible != no)
 567                 return true;
 568
 569         if (!sym || sym_get_tristate_value(menu->sym) == no)
 570                 return false;
 571
 572         for (child = menu->list; child; child = child->next) {
 573                 if (menu_is_visible(child)) {
 574                         if (sym)
 575                                 sym->flags |= SYMBOL_DEF_USER;
 576                         return true;
 577                 }
 578         }
 579
 580         return false;
 581 }
 582
 583 const char *menu_get_prompt(struct menu *menu)
 584 {
 585         if (menu->prompt)
 586                 return menu->prompt->text;
 587         else if (menu->sym)
 588                 return menu->sym->name;
 589         return NULL;
 590 }
 591
 592 struct menu *menu_get_root_menu(struct menu *menu)
 593 {
 594         return &rootmenu;
 595 }
 596
 597 struct menu *menu_get_parent_menu(struct menu *menu)
 598 {
 599         enum prop_type type;
 600
 601         for (; menu != &rootmenu; menu = menu->parent) {
 602                 type = menu->prompt ? menu->prompt->type : 0;
 603                 if (type == P_MENU)
 604                         break;
 605         }
 606         return menu;
 607 }
 608
 609 bool menu_has_help(struct menu *menu)
 610 {
 611         return menu->help != NULL;
 612 }
 613
 614 const char *menu_get_help(struct menu *menu)
 615 {
 616         if (menu->help)
 617                 return menu->help;
 618         else
 619                 return "";
 620 }
 621
 622 static void get_prompt_str(struct gstr *r, struct property *prop,
 623                            struct list_head *head)
 624 {
 625         int i, j;
 626         struct menu *submenu[8], *menu, *location = NULL;
 627         struct jump_key *jump = NULL;
 628
 629         str_printf(r, _("Prompt: %s\n"), _(prop->text));
 630         menu = prop->menu->parent;
 631         for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
 632                 bool accessible = menu_is_visible(menu);
 633
 634                 submenu[i++] = menu;
 635                 if (location == NULL && accessible)
 636                         location = menu;
 637         }
 638         if (head && location) {
 639                 jump = xmalloc(sizeof(struct jump_key));
 640
 641                 if (menu_is_visible(prop->menu)) {
 642                         /*
 643                          * There is not enough room to put the hint at the
 644                          * beginning of the "Prompt" line. Put the hint on the
 645                          * last "Location" line even when it would belong on
 646                          * the former.
 647                          */
 648                         jump->target = prop->menu;
 649                 } else
 650                         jump->target = location;
 651
 652                 if (list_empty(head))
 653                         jump->index = 0;
 654                 else
 655                         jump->index = list_entry(head->prev, struct jump_key,
 656                                                  entries)->index + 1;
 657
 658                 list_add_tail(&jump->entries, head);
 659         }
 660
 661         if (i > 0) {
 662                 str_printf(r, _("  Location:\n"));
 663                 for (j = 4; --i >= 0; j += 2) {
 664                         menu = submenu[i];
 665                         if (jump && menu == location)
 666                                 jump->offset = strlen(r->s);
 667                         str_printf(r, "%*c-> %s", j, ' ',
 668                                    _(menu_get_prompt(menu)));
 669                         if (menu->sym) {
 670                                 str_printf(r, " (%s [=%s])", menu->sym->name ?
 671                                         menu->sym->name : _("<choice>"),
 672                                         sym_get_string_value(menu->sym));
 673                         }
 674                         str_append(r, "\n");
 675                 }
 676         }
 677 }
 678
 679 /*
 680  * get property of type P_SYMBOL
 681  */
 682 static struct property *get_symbol_prop(struct symbol *sym)
 683 {
 684         struct property *prop = NULL;
 685
 686         for_all_properties(sym, prop, P_SYMBOL)
 687                 break;
 688         return prop;
 689 }
 690
 691 static void get_symbol_props_str(struct gstr *r, struct symbol *sym,
 692                                  enum prop_type tok, const char *prefix)
 693 {
 694         bool hit = false;
 695         struct property *prop;
 696
 697         for_all_properties(sym, prop, tok) {
 698                 if (!hit) {
 699                         str_append(r, prefix);
 700                         hit = true;
 701                 } else
 702                         str_printf(r, " && ");
 703                 expr_gstr_print(prop->expr, r);
 704         }
 705         if (hit)
 706                 str_append(r, "\n");
 707 }
 708
 709 /*
 710  * head is optional and may be NULL
 711  */
 712 static void get_symbol_str(struct gstr *r, struct symbol *sym,
 713                     struct list_head *head)
 714 {
 715         struct property *prop;
 716
 717         if (sym && sym->name) {
 718                 str_printf(r, "Symbol: %s [=%s]\n", sym->name,
 719                            sym_get_string_value(sym));
 720                 str_printf(r, "Type  : %s\n", sym_type_name(sym->type));
 721                 if (sym->type == S_INT || sym->type == S_HEX) {
 722                         prop = sym_get_range_prop(sym);
 723                         if (prop) {
 724                                 str_printf(r, "Range : ");
 725                                 expr_gstr_print(prop->expr, r);
 726                                 str_append(r, "\n");
 727                         }
 728                 }
 729         }
 730         for_all_prompts(sym, prop)
 731                 get_prompt_str(r, prop, head);
 732
 733         prop = get_symbol_prop(sym);
 734         if (prop) {
 735                 str_printf(r, _("  Defined at %s:%d\n"), prop->menu->file->name,
 736                         prop->menu->lineno);
 737                 if (!expr_is_yes(prop->visible.expr)) {
 738                         str_append(r, _("  Depends on: "));
 739                         expr_gstr_print(prop->visible.expr, r);
 740                         str_append(r, "\n");
 741                 }
 742         }
 743
 744         get_symbol_props_str(r, sym, P_SELECT, _("  Selects: "));
 745         if (sym->rev_dep.expr) {
 746                 str_append(r, _("  Selected by: "));
 747                 expr_gstr_print(sym->rev_dep.expr, r);
 748                 str_append(r, "\n");
 749         }
 750
 751         get_symbol_props_str(r, sym, P_IMPLY, _("  Implies: "));
 752         if (sym->implied.expr) {
 753                 str_append(r, _("  Implied by: "));
 754                 expr_gstr_print(sym->implied.expr, r);
 755                 str_append(r, "\n");
 756         }
 757
 758         str_append(r, "\n\n");
 759 }
 760
 761 struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
 762 {
 763         struct symbol *sym;
 764         struct gstr res = str_new();
 765         int i;
 766
 767         for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
 768                 get_symbol_str(&res, sym, head);
 769         if (!i)
 770                 str_append(&res, _("No matches found.\n"));
 771         return res;
 772 }
 773
 774
 775 void menu_get_ext_help(struct menu *menu, struct gstr *help)
 776 {
 777         struct symbol *sym = menu->sym;
 778         const char *help_text = nohelp_text;
 779
 780         if (menu_has_help(menu)) {
 781                 if (sym->name)
 782                         str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
 783                 help_text = menu_get_help(menu);
 784         }
 785         str_printf(help, "%s\n", _(help_text));
 786         if (sym)
 787                 get_symbol_str(help, sym, NULL);
 788 }