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, rewrite_m(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 = rewrite_m(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 = expr_transform(menu->dep);
 344                         basedep = expr_alloc_and(expr_copy(parentdep), basedep);
 345                         basedep = expr_eliminate_dups(basedep);
 346                         menu->dep = basedep;
 347
 348                         if (menu->sym)
 349                                 /*
 350                                  * Note: For symbols, all prompts are included
 351                                  * too in the symbol's own property list
 352                                  */
 353                                 prop = menu->sym->prop;
 354                         else
 355                                 /*
 356                                  * For non-symbol menu nodes, we just need to
 357                                  * handle the prompt
 358                                  */
 359                                 prop = menu->prompt;
 360
 361                         /* For each property... */
 362                         for (; prop; prop = prop->next) {
 363                                 if (prop->menu != menu)
 364                                         /*
 365                                          * Two possibilities:
 366                                          *
 367                                          * 1. The property lacks dependencies
 368                                          *    and so isn't location-specific,
 369                                          *    e.g. an 'option'
 370                                          *
 371                                          * 2. The property belongs to a symbol
 372                                          *    defined in multiple locations and
 373                                          *    is from some other location. It
 374                                          *    will be handled there in that
 375                                          *    case.
 376                                          *
 377                                          * Skip the property.
 378                                          */
 379                                         continue;
 380
 381                                 /*
 382                                  * Propagate parent dependencies to the
 383                                  * property's condition, rewriting and
 384                                  * simplifying expressions at the same time
 385                                  */
 386                                 dep = expr_transform(prop->visible.expr);
 387                                 dep = expr_alloc_and(expr_copy(basedep), dep);
 388                                 dep = expr_eliminate_dups(dep);
 389                                 if (menu->sym && menu->sym->type != S_TRISTATE)
 390                                         dep = expr_trans_bool(dep);
 391                                 prop->visible.expr = dep;
 392
 393                                 /*
 394                                  * Handle selects and implies, which modify the
 395                                  * dependencies of the selected/implied symbol
 396                                  */
 397                                 if (prop->type == P_SELECT) {
 398                                         struct symbol *es = prop_get_symbol(prop);
 399                                         es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
 400                                                         expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
 401                                 } else if (prop->type == P_IMPLY) {
 402                                         struct symbol *es = prop_get_symbol(prop);
 403                                         es->implied.expr = expr_alloc_or(es->implied.expr,
 404                                                         expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
 405                                 }
 406                         }
 407                 }
 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                 basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
 417                 basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
 418                 basedep = expr_eliminate_dups(expr_transform(basedep));
 419                 last_menu = NULL;
 420                 for (menu = parent->next; menu; menu = menu->next) {
 421                         dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
 422                         if (!expr_contains_symbol(dep, sym))
 423                                 break;
 424                         if (expr_depends_symbol(dep, sym))
 425                                 goto next;
 426                         dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
 427                         dep = expr_eliminate_dups(expr_transform(dep));
 428                         dep2 = expr_copy(basedep);
 429                         expr_eliminate_eq(&dep, &dep2);
 430                         expr_free(dep);
 431                         if (!expr_is_yes(dep2)) {
 432                                 expr_free(dep2);
 433                                 break;
 434                         }
 435                         expr_free(dep2);
 436                 next:
 437                         menu_finalize(menu);
 438                         menu->parent = parent;
 439                         last_menu = menu;
 440                 }
 441                 if (last_menu) {
 442                         parent->list = parent->next;
 443                         parent->next = last_menu->next;
 444                         last_menu->next = NULL;
 445                 }
 446
 447                 sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
 448         }
 449         for (menu = parent->list; menu; menu = menu->next) {
 450                 if (sym && sym_is_choice(sym) &&
 451                     menu->sym && !sym_is_choice_value(menu->sym)) {
 452                         current_entry = menu;
 453                         menu->sym->flags |= SYMBOL_CHOICEVAL;
 454                         if (!menu->prompt)
 455                                 menu_warn(menu, "choice value must have a prompt");
 456                         for (prop = menu->sym->prop; prop; prop = prop->next) {
 457                                 if (prop->type == P_DEFAULT)
 458                                         prop_warn(prop, "defaults for choice "
 459                                                   "values not supported");
 460                                 if (prop->menu == menu)
 461                                         continue;
 462                                 if (prop->type == P_PROMPT &&
 463                                     prop->menu->parent->sym != sym)
 464                                         prop_warn(prop, "choice value used outside its choice group");
 465                         }
 466                         /* Non-tristate choice values of tristate choices must
 467                          * depend on the choice being set to Y. The choice
 468                          * values' dependencies were propagated to their
 469                          * properties above, so the change here must be re-
 470                          * propagated.
 471                          */
 472                         if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
 473                                 basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
 474                                 menu->dep = expr_alloc_and(basedep, menu->dep);
 475                                 for (prop = menu->sym->prop; prop; prop = prop->next) {
 476                                         if (prop->menu != menu)
 477                                                 continue;
 478                                         prop->visible.expr = expr_alloc_and(expr_copy(basedep),
 479                                                                             prop->visible.expr);
 480                                 }
 481                         }
 482                         menu_add_symbol(P_CHOICE, sym, NULL);
 483                         prop = sym_get_choice_prop(sym);
 484                         for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
 485                                 ;
 486                         *ep = expr_alloc_one(E_LIST, NULL);
 487                         (*ep)->right.sym = menu->sym;
 488                 }
 489                 if (menu->list && (!menu->prompt || !menu->prompt->text)) {
 490                         for (last_menu = menu->list; ; last_menu = last_menu->next) {
 491                                 last_menu->parent = parent;
 492                                 if (!last_menu->next)
 493                                         break;
 494                         }
 495                         last_menu->next = menu->next;
 496                         menu->next = menu->list;
 497                         menu->list = NULL;
 498                 }
 499         }
 500
 501         if (sym && !(sym->flags & SYMBOL_WARNED)) {
 502                 if (sym->type == S_UNKNOWN)
 503                         menu_warn(parent, "config symbol defined without type");
 504
 505                 if (sym_is_choice(sym) && !parent->prompt)
 506                         menu_warn(parent, "choice must have a prompt");
 507
 508                 /* Check properties connected to this symbol */
 509                 sym_check_prop(sym);
 510                 sym->flags |= SYMBOL_WARNED;
 511         }
 512
 513         if (sym && !sym_is_optional(sym) && parent->prompt) {
 514                 sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
 515                                 expr_alloc_and(parent->prompt->visible.expr,
 516                                         expr_alloc_symbol(&symbol_mod)));
 517         }
 518 }
 519
 520 bool menu_has_prompt(struct menu *menu)
 521 {
 522         if (!menu->prompt)
 523                 return false;
 524         return true;
 525 }
 526
 527 /*
 528  * Determine if a menu is empty.
 529  * A menu is considered empty if it contains no or only
 530  * invisible entries.
 531  */
 532 bool menu_is_empty(struct menu *menu)
 533 {
 534         struct menu *child;
 535
 536         for (child = menu->list; child; child = child->next) {
 537                 if (menu_is_visible(child))
 538                         return(false);
 539         }
 540         return(true);
 541 }
 542
 543 bool menu_is_visible(struct menu *menu)
 544 {
 545         struct menu *child;
 546         struct symbol *sym;
 547         tristate visible;
 548
 549         if (!menu->prompt)
 550                 return false;
 551
 552         if (menu->visibility) {
 553                 if (expr_calc_value(menu->visibility) == no)
 554                         return false;
 555         }
 556
 557         sym = menu->sym;
 558         if (sym) {
 559                 sym_calc_value(sym);
 560                 visible = menu->prompt->visible.tri;
 561         } else
 562                 visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
 563
 564         if (visible != no)
 565                 return true;
 566
 567         if (!sym || sym_get_tristate_value(menu->sym) == no)
 568                 return false;
 569
 570         for (child = menu->list; child; child = child->next) {
 571                 if (menu_is_visible(child)) {
 572                         if (sym)
 573                                 sym->flags |= SYMBOL_DEF_USER;
 574                         return true;
 575                 }
 576         }
 577
 578         return false;
 579 }
 580
 581 const char *menu_get_prompt(struct menu *menu)
 582 {
 583         if (menu->prompt)
 584                 return menu->prompt->text;
 585         else if (menu->sym)
 586                 return menu->sym->name;
 587         return NULL;
 588 }
 589
 590 struct menu *menu_get_root_menu(struct menu *menu)
 591 {
 592         return &rootmenu;
 593 }
 594
 595 struct menu *menu_get_parent_menu(struct menu *menu)
 596 {
 597         enum prop_type type;
 598
 599         for (; menu != &rootmenu; menu = menu->parent) {
 600                 type = menu->prompt ? menu->prompt->type : 0;
 601                 if (type == P_MENU)
 602                         break;
 603         }
 604         return menu;
 605 }
 606
 607 bool menu_has_help(struct menu *menu)
 608 {
 609         return menu->help != NULL;
 610 }
 611
 612 const char *menu_get_help(struct menu *menu)
 613 {
 614         if (menu->help)
 615                 return menu->help;
 616         else
 617                 return "";
 618 }
 619
 620 static void get_prompt_str(struct gstr *r, struct property *prop,
 621                            struct list_head *head)
 622 {
 623         int i, j;
 624         struct menu *submenu[8], *menu, *location = NULL;
 625         struct jump_key *jump = NULL;
 626
 627         str_printf(r, _("Prompt: %s\n"), _(prop->text));
 628         menu = prop->menu->parent;
 629         for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
 630                 bool accessible = menu_is_visible(menu);
 631
 632                 submenu[i++] = menu;
 633                 if (location == NULL && accessible)
 634                         location = menu;
 635         }
 636         if (head && location) {
 637                 jump = xmalloc(sizeof(struct jump_key));
 638
 639                 if (menu_is_visible(prop->menu)) {
 640                         /*
 641                          * There is not enough room to put the hint at the
 642                          * beginning of the "Prompt" line. Put the hint on the
 643                          * last "Location" line even when it would belong on
 644                          * the former.
 645                          */
 646                         jump->target = prop->menu;
 647                 } else
 648                         jump->target = location;
 649
 650                 if (list_empty(head))
 651                         jump->index = 0;
 652                 else
 653                         jump->index = list_entry(head->prev, struct jump_key,
 654                                                  entries)->index + 1;
 655
 656                 list_add_tail(&jump->entries, head);
 657         }
 658
 659         if (i > 0) {
 660                 str_printf(r, _("  Location:\n"));
 661                 for (j = 4; --i >= 0; j += 2) {
 662                         menu = submenu[i];
 663                         if (jump && menu == location)
 664                                 jump->offset = strlen(r->s);
 665                         str_printf(r, "%*c-> %s", j, ' ',
 666                                    _(menu_get_prompt(menu)));
 667                         if (menu->sym) {
 668                                 str_printf(r, " (%s [=%s])", menu->sym->name ?
 669                                         menu->sym->name : _("<choice>"),
 670                                         sym_get_string_value(menu->sym));
 671                         }
 672                         str_append(r, "\n");
 673                 }
 674         }
 675 }
 676
 677 /*
 678  * get property of type P_SYMBOL
 679  */
 680 static struct property *get_symbol_prop(struct symbol *sym)
 681 {
 682         struct property *prop = NULL;
 683
 684         for_all_properties(sym, prop, P_SYMBOL)
 685                 break;
 686         return prop;
 687 }
 688
 689 static void get_symbol_props_str(struct gstr *r, struct symbol *sym,
 690                                  enum prop_type tok, const char *prefix)
 691 {
 692         bool hit = false;
 693         struct property *prop;
 694
 695         for_all_properties(sym, prop, tok) {
 696                 if (!hit) {
 697                         str_append(r, prefix);
 698                         hit = true;
 699                 } else
 700                         str_printf(r, " && ");
 701                 expr_gstr_print(prop->expr, r);
 702         }
 703         if (hit)
 704                 str_append(r, "\n");
 705 }
 706
 707 /*
 708  * head is optional and may be NULL
 709  */
 710 static void get_symbol_str(struct gstr *r, struct symbol *sym,
 711                     struct list_head *head)
 712 {
 713         struct property *prop;
 714
 715         if (sym && sym->name) {
 716                 str_printf(r, "Symbol: %s [=%s]\n", sym->name,
 717                            sym_get_string_value(sym));
 718                 str_printf(r, "Type  : %s\n", sym_type_name(sym->type));
 719                 if (sym->type == S_INT || sym->type == S_HEX) {
 720                         prop = sym_get_range_prop(sym);
 721                         if (prop) {
 722                                 str_printf(r, "Range : ");
 723                                 expr_gstr_print(prop->expr, r);
 724                                 str_append(r, "\n");
 725                         }
 726                 }
 727         }
 728         for_all_prompts(sym, prop)
 729                 get_prompt_str(r, prop, head);
 730
 731         prop = get_symbol_prop(sym);
 732         if (prop) {
 733                 str_printf(r, _("  Defined at %s:%d\n"), prop->menu->file->name,
 734                         prop->menu->lineno);
 735                 if (!expr_is_yes(prop->visible.expr)) {
 736                         str_append(r, _("  Depends on: "));
 737                         expr_gstr_print(prop->visible.expr, r);
 738                         str_append(r, "\n");
 739                 }
 740         }
 741
 742         get_symbol_props_str(r, sym, P_SELECT, _("  Selects: "));
 743         if (sym->rev_dep.expr) {
 744                 str_append(r, _("  Selected by: "));
 745                 expr_gstr_print(sym->rev_dep.expr, r);
 746                 str_append(r, "\n");
 747         }
 748
 749         get_symbol_props_str(r, sym, P_IMPLY, _("  Implies: "));
 750         if (sym->implied.expr) {
 751                 str_append(r, _("  Implied by: "));
 752                 expr_gstr_print(sym->implied.expr, r);
 753                 str_append(r, "\n");
 754         }
 755
 756         str_append(r, "\n\n");
 757 }
 758
 759 struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
 760 {
 761         struct symbol *sym;
 762         struct gstr res = str_new();
 763         int i;
 764
 765         for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
 766                 get_symbol_str(&res, sym, head);
 767         if (!i)
 768                 str_append(&res, _("No matches found.\n"));
 769         return res;
 770 }
 771
 772
 773 void menu_get_ext_help(struct menu *menu, struct gstr *help)
 774 {
 775         struct symbol *sym = menu->sym;
 776         const char *help_text = nohelp_text;
 777
 778         if (menu_has_help(menu)) {
 779                 if (sym->name)
 780                         str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
 781                 help_text = menu_get_help(menu);
 782         }
 783         str_printf(help, "%s\n", _(help_text));
 784         if (sym)
 785                 get_symbol_str(help, sym, NULL);
 786 }