scripts/kconfig/parser.y

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
   4  */
   5 %{
   6
   7 #include <ctype.h>
   8 #include <stdarg.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <stdbool.h>
  13
  14 #include "lkc.h"
  15 #include "internal.h"
  16
  17 #define printd(mask, fmt...) if (cdebug & (mask)) printf(fmt)
  18
  19 #define PRINTD          0x0001
  20 #define DEBUG_PARSE     0x0002
  21
  22 int cdebug = PRINTD;
  23
  24 static void yyerror(const char *err);
  25 static void zconfprint(const char *err, ...);
  26 static void zconf_error(const char *err, ...);
  27 static bool zconf_endtoken(const char *tokenname,
  28                            const char *expected_tokenname);
  29
  30 struct symbol *symbol_hash[SYMBOL_HASHSIZE];
  31
  32 struct menu *current_menu, *current_entry;
  33
  34 %}
  35
  36 %union
  37 {
  38         char *string;
  39         struct symbol *symbol;
  40         struct expr *expr;
  41         struct menu *menu;
  42         enum symbol_type type;
  43         enum variable_flavor flavor;
  44 }
  45
  46 %token <string> T_HELPTEXT
  47 %token <string> T_WORD
  48 %token <string> T_WORD_QUOTE
  49 %token T_BOOL
  50 %token T_CHOICE
  51 %token T_CLOSE_PAREN
  52 %token T_COLON_EQUAL
  53 %token T_COMMENT
  54 %token T_CONFIG
  55 %token T_DEFAULT
  56 %token T_DEF_BOOL
  57 %token T_DEF_TRISTATE
  58 %token T_DEPENDS
  59 %token T_ENDCHOICE
  60 %token T_ENDIF
  61 %token T_ENDMENU
  62 %token T_HELP
  63 %token T_HEX
  64 %token T_IF
  65 %token T_IMPLY
  66 %token T_INT
  67 %token T_MAINMENU
  68 %token T_MENU
  69 %token T_MENUCONFIG
  70 %token T_MODULES
  71 %token T_ON
  72 %token T_OPEN_PAREN
  73 %token T_OPTIONAL
  74 %token T_PLUS_EQUAL
  75 %token T_PROMPT
  76 %token T_RANGE
  77 %token T_SELECT
  78 %token T_SOURCE
  79 %token T_STRING
  80 %token T_TRISTATE
  81 %token T_VISIBLE
  82 %token T_EOL
  83 %token <string> T_ASSIGN_VAL
  84
  85 %left T_OR
  86 %left T_AND
  87 %left T_EQUAL T_UNEQUAL
  88 %left T_LESS T_LESS_EQUAL T_GREATER T_GREATER_EQUAL
  89 %nonassoc T_NOT
  90
  91 %type <symbol> nonconst_symbol
  92 %type <symbol> symbol
  93 %type <type> type logic_type default
  94 %type <expr> expr
  95 %type <expr> if_expr
  96 %type <string> end
  97 %type <menu> if_entry menu_entry choice_entry
  98 %type <string> word_opt assign_val
  99 %type <flavor> assign_op
 100
 101 %destructor {
 102         fprintf(stderr, "%s:%d: missing end statement for this entry\n",
 103                 $$->file->name, $$->lineno);
 104         if (current_menu == $$)
 105                 menu_end_menu();
 106 } if_entry menu_entry choice_entry
 107
 108 %%
 109 input: mainmenu_stmt stmt_list | stmt_list;
 110
 111 /* mainmenu entry */
 112
 113 mainmenu_stmt: T_MAINMENU T_WORD_QUOTE T_EOL
 114 {
 115         menu_add_prompt(P_MENU, $2, NULL);
 116 };
 117
 118 stmt_list:
 119           /* empty */
 120         | stmt_list assignment_stmt
 121         | stmt_list choice_stmt
 122         | stmt_list comment_stmt
 123         | stmt_list config_stmt
 124         | stmt_list if_stmt
 125         | stmt_list menu_stmt
 126         | stmt_list menuconfig_stmt
 127         | stmt_list source_stmt
 128         | stmt_list T_WORD error T_EOL  { zconf_error("unknown statement \"%s\"", $2); }
 129         | stmt_list error T_EOL         { zconf_error("invalid statement"); }
 130 ;
 131
 132 stmt_list_in_choice:
 133           /* empty */
 134         | stmt_list_in_choice comment_stmt
 135         | stmt_list_in_choice config_stmt
 136         | stmt_list_in_choice if_stmt_in_choice
 137         | stmt_list_in_choice error T_EOL       { zconf_error("invalid statement"); }
 138 ;
 139
 140 /* config/menuconfig entry */
 141
 142 config_entry_start: T_CONFIG nonconst_symbol T_EOL
 143 {
 144         $2->flags |= SYMBOL_OPTIONAL;
 145         menu_add_entry($2);
 146         printd(DEBUG_PARSE, "%s:%d:config %s\n", zconf_curname(), zconf_lineno(), $2->name);
 147 };
 148
 149 config_stmt: config_entry_start config_option_list
 150 {
 151         printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
 152 };
 153
 154 menuconfig_entry_start: T_MENUCONFIG nonconst_symbol T_EOL
 155 {
 156         $2->flags |= SYMBOL_OPTIONAL;
 157         menu_add_entry($2);
 158         printd(DEBUG_PARSE, "%s:%d:menuconfig %s\n", zconf_curname(), zconf_lineno(), $2->name);
 159 };
 160
 161 menuconfig_stmt: menuconfig_entry_start config_option_list
 162 {
 163         if (current_entry->prompt)
 164                 current_entry->prompt->type = P_MENU;
 165         else
 166                 zconfprint("warning: menuconfig statement without prompt");
 167         printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
 168 };
 169
 170 config_option_list:
 171           /* empty */
 172         | config_option_list config_option
 173         | config_option_list depends
 174         | config_option_list help
 175 ;
 176
 177 config_option: type prompt_stmt_opt T_EOL
 178 {
 179         menu_set_type($1);
 180         printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
 181                 zconf_curname(), zconf_lineno(),
 182                 $1);
 183 };
 184
 185 config_option: T_PROMPT T_WORD_QUOTE if_expr T_EOL
 186 {
 187         menu_add_prompt(P_PROMPT, $2, $3);
 188         printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
 189 };
 190
 191 config_option: default expr if_expr T_EOL
 192 {
 193         menu_add_expr(P_DEFAULT, $2, $3);
 194         if ($1 != S_UNKNOWN)
 195                 menu_set_type($1);
 196         printd(DEBUG_PARSE, "%s:%d:default(%u)\n",
 197                 zconf_curname(), zconf_lineno(),
 198                 $1);
 199 };
 200
 201 config_option: T_SELECT nonconst_symbol if_expr T_EOL
 202 {
 203         menu_add_symbol(P_SELECT, $2, $3);
 204         printd(DEBUG_PARSE, "%s:%d:select\n", zconf_curname(), zconf_lineno());
 205 };
 206
 207 config_option: T_IMPLY nonconst_symbol if_expr T_EOL
 208 {
 209         menu_add_symbol(P_IMPLY, $2, $3);
 210         printd(DEBUG_PARSE, "%s:%d:imply\n", zconf_curname(), zconf_lineno());
 211 };
 212
 213 config_option: T_RANGE symbol symbol if_expr T_EOL
 214 {
 215         menu_add_expr(P_RANGE, expr_alloc_comp(E_RANGE,$2, $3), $4);
 216         printd(DEBUG_PARSE, "%s:%d:range\n", zconf_curname(), zconf_lineno());
 217 };
 218
 219 config_option: T_MODULES T_EOL
 220 {
 221         if (modules_sym)
 222                 zconf_error("symbol '%s' redefines option 'modules' already defined by symbol '%s'",
 223                             current_entry->sym->name, modules_sym->name);
 224         modules_sym = current_entry->sym;
 225 };
 226
 227 /* choice entry */
 228
 229 choice: T_CHOICE word_opt T_EOL
 230 {
 231         struct symbol *sym = sym_lookup($2, SYMBOL_CHOICE);
 232         sym->flags |= SYMBOL_NO_WRITE;
 233         menu_add_entry(sym);
 234         menu_add_expr(P_CHOICE, NULL, NULL);
 235         free($2);
 236         printd(DEBUG_PARSE, "%s:%d:choice\n", zconf_curname(), zconf_lineno());
 237 };
 238
 239 choice_entry: choice choice_option_list
 240 {
 241         $$ = menu_add_menu();
 242 };
 243
 244 choice_end: end
 245 {
 246         if (zconf_endtoken($1, "choice")) {
 247                 menu_end_menu();
 248                 printd(DEBUG_PARSE, "%s:%d:endchoice\n", zconf_curname(), zconf_lineno());
 249         }
 250 };
 251
 252 choice_stmt: choice_entry stmt_list_in_choice choice_end
 253 ;
 254
 255 choice_option_list:
 256           /* empty */
 257         | choice_option_list choice_option
 258         | choice_option_list depends
 259         | choice_option_list help
 260 ;
 261
 262 choice_option: T_PROMPT T_WORD_QUOTE if_expr T_EOL
 263 {
 264         menu_add_prompt(P_PROMPT, $2, $3);
 265         printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
 266 };
 267
 268 choice_option: logic_type prompt_stmt_opt T_EOL
 269 {
 270         menu_set_type($1);
 271         printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
 272                zconf_curname(), zconf_lineno(), $1);
 273 };
 274
 275 choice_option: T_OPTIONAL T_EOL
 276 {
 277         current_entry->sym->flags |= SYMBOL_OPTIONAL;
 278         printd(DEBUG_PARSE, "%s:%d:optional\n", zconf_curname(), zconf_lineno());
 279 };
 280
 281 choice_option: T_DEFAULT nonconst_symbol if_expr T_EOL
 282 {
 283         menu_add_symbol(P_DEFAULT, $2, $3);
 284         printd(DEBUG_PARSE, "%s:%d:default\n",
 285                zconf_curname(), zconf_lineno());
 286 };
 287
 288 type:
 289           logic_type
 290         | T_INT                 { $$ = S_INT; }
 291         | T_HEX                 { $$ = S_HEX; }
 292         | T_STRING              { $$ = S_STRING; }
 293
 294 logic_type:
 295           T_BOOL                { $$ = S_BOOLEAN; }
 296         | T_TRISTATE            { $$ = S_TRISTATE; }
 297
 298 default:
 299           T_DEFAULT             { $$ = S_UNKNOWN; }
 300         | T_DEF_BOOL            { $$ = S_BOOLEAN; }
 301         | T_DEF_TRISTATE        { $$ = S_TRISTATE; }
 302
 303 /* if entry */
 304
 305 if_entry: T_IF expr T_EOL
 306 {
 307         printd(DEBUG_PARSE, "%s:%d:if\n", zconf_curname(), zconf_lineno());
 308         menu_add_entry(NULL);
 309         menu_add_dep($2);
 310         $$ = menu_add_menu();
 311 };
 312
 313 if_end: end
 314 {
 315         if (zconf_endtoken($1, "if")) {
 316                 menu_end_menu();
 317                 printd(DEBUG_PARSE, "%s:%d:endif\n", zconf_curname(), zconf_lineno());
 318         }
 319 };
 320
 321 if_stmt: if_entry stmt_list if_end
 322 ;
 323
 324 if_stmt_in_choice: if_entry stmt_list_in_choice if_end
 325 ;
 326
 327 /* menu entry */
 328
 329 menu: T_MENU T_WORD_QUOTE T_EOL
 330 {
 331         menu_add_entry(NULL);
 332         menu_add_prompt(P_MENU, $2, NULL);
 333         printd(DEBUG_PARSE, "%s:%d:menu\n", zconf_curname(), zconf_lineno());
 334 };
 335
 336 menu_entry: menu menu_option_list
 337 {
 338         $$ = menu_add_menu();
 339 };
 340
 341 menu_end: end
 342 {
 343         if (zconf_endtoken($1, "menu")) {
 344                 menu_end_menu();
 345                 printd(DEBUG_PARSE, "%s:%d:endmenu\n", zconf_curname(), zconf_lineno());
 346         }
 347 };
 348
 349 menu_stmt: menu_entry stmt_list menu_end
 350 ;
 351
 352 menu_option_list:
 353           /* empty */
 354         | menu_option_list visible
 355         | menu_option_list depends
 356 ;
 357
 358 source_stmt: T_SOURCE T_WORD_QUOTE T_EOL
 359 {
 360         printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), $2);
 361         zconf_nextfile($2);
 362         free($2);
 363 };
 364
 365 /* comment entry */
 366
 367 comment: T_COMMENT T_WORD_QUOTE T_EOL
 368 {
 369         menu_add_entry(NULL);
 370         menu_add_prompt(P_COMMENT, $2, NULL);
 371         printd(DEBUG_PARSE, "%s:%d:comment\n", zconf_curname(), zconf_lineno());
 372 };
 373
 374 comment_stmt: comment comment_option_list
 375 ;
 376
 377 comment_option_list:
 378           /* empty */
 379         | comment_option_list depends
 380 ;
 381
 382 /* help option */
 383
 384 help_start: T_HELP T_EOL
 385 {
 386         printd(DEBUG_PARSE, "%s:%d:help\n", zconf_curname(), zconf_lineno());
 387         zconf_starthelp();
 388 };
 389
 390 help: help_start T_HELPTEXT
 391 {
 392         if (current_entry->help) {
 393                 free(current_entry->help);
 394                 zconfprint("warning: '%s' defined with more than one help text -- only the last one will be used",
 395                            current_entry->sym->name ?: "<choice>");
 396         }
 397
 398         /* Is the help text empty or all whitespace? */
 399         if ($2[strspn($2, " \f\n\r\t\v")] == '\0')
 400                 zconfprint("warning: '%s' defined with blank help text",
 401                            current_entry->sym->name ?: "<choice>");
 402
 403         current_entry->help = $2;
 404 };
 405
 406 /* depends option */
 407
 408 depends: T_DEPENDS T_ON expr T_EOL
 409 {
 410         menu_add_dep($3);
 411         printd(DEBUG_PARSE, "%s:%d:depends on\n", zconf_curname(), zconf_lineno());
 412 };
 413
 414 /* visibility option */
 415 visible: T_VISIBLE if_expr T_EOL
 416 {
 417         menu_add_visibility($2);
 418 };
 419
 420 /* prompt statement */
 421
 422 prompt_stmt_opt:
 423           /* empty */
 424         | T_WORD_QUOTE if_expr
 425 {
 426         menu_add_prompt(P_PROMPT, $1, $2);
 427 };
 428
 429 end:      T_ENDMENU T_EOL       { $$ = "menu"; }
 430         | T_ENDCHOICE T_EOL     { $$ = "choice"; }
 431         | T_ENDIF T_EOL         { $$ = "if"; }
 432 ;
 433
 434 if_expr:  /* empty */                   { $$ = NULL; }
 435         | T_IF expr                     { $$ = $2; }
 436 ;
 437
 438 expr:     symbol                                { $$ = expr_alloc_symbol($1); }
 439         | symbol T_LESS symbol                  { $$ = expr_alloc_comp(E_LTH, $1, $3); }
 440         | symbol T_LESS_EQUAL symbol            { $$ = expr_alloc_comp(E_LEQ, $1, $3); }
 441         | symbol T_GREATER symbol               { $$ = expr_alloc_comp(E_GTH, $1, $3); }
 442         | symbol T_GREATER_EQUAL symbol         { $$ = expr_alloc_comp(E_GEQ, $1, $3); }
 443         | symbol T_EQUAL symbol                 { $$ = expr_alloc_comp(E_EQUAL, $1, $3); }
 444         | symbol T_UNEQUAL symbol               { $$ = expr_alloc_comp(E_UNEQUAL, $1, $3); }
 445         | T_OPEN_PAREN expr T_CLOSE_PAREN       { $$ = $2; }
 446         | T_NOT expr                            { $$ = expr_alloc_one(E_NOT, $2); }
 447         | expr T_OR expr                        { $$ = expr_alloc_two(E_OR, $1, $3); }
 448         | expr T_AND expr                       { $$ = expr_alloc_two(E_AND, $1, $3); }
 449 ;
 450
 451 /* For symbol definitions, selects, etc., where quotes are not accepted */
 452 nonconst_symbol: T_WORD { $$ = sym_lookup($1, 0); free($1); };
 453
 454 symbol:   nonconst_symbol
 455         | T_WORD_QUOTE  { $$ = sym_lookup($1, SYMBOL_CONST); free($1); }
 456 ;
 457
 458 word_opt: /* empty */                   { $$ = NULL; }
 459         | T_WORD
 460
 461 /* assignment statement */
 462
 463 assignment_stmt:  T_WORD assign_op assign_val T_EOL     { variable_add($1, $3, $2); free($1); free($3); }
 464
 465 assign_op:
 466           T_EQUAL       { $$ = VAR_RECURSIVE; }
 467         | T_COLON_EQUAL { $$ = VAR_SIMPLE; }
 468         | T_PLUS_EQUAL  { $$ = VAR_APPEND; }
 469 ;
 470
 471 assign_val:
 472         /* empty */             { $$ = xstrdup(""); };
 473         | T_ASSIGN_VAL
 474 ;
 475
 476 %%
 477
 478 void conf_parse(const char *name)
 479 {
 480         struct symbol *sym;
 481         int i;
 482
 483         zconf_initscan(name);
 484
 485         _menu_init();
 486
 487         if (getenv("ZCONF_DEBUG"))
 488                 yydebug = 1;
 489         yyparse();
 490
 491         /* Variables are expanded in the parse phase. We can free them here. */
 492         variable_all_del();
 493
 494         if (yynerrs)
 495                 exit(1);
 496         if (!modules_sym)
 497                 modules_sym = sym_find( "n" );
 498
 499         if (!menu_has_prompt(&rootmenu)) {
 500                 current_entry = &rootmenu;
 501                 menu_add_prompt(P_MENU, "Main menu", NULL);
 502         }
 503
 504         menu_finalize(&rootmenu);
 505         for_all_symbols(i, sym) {
 506                 if (sym_check_deps(sym))
 507                         yynerrs++;
 508         }
 509         if (yynerrs)
 510                 exit(1);
 511         conf_set_changed(true);
 512 }
 513
 514 static bool zconf_endtoken(const char *tokenname,
 515                            const char *expected_tokenname)
 516 {
 517         if (strcmp(tokenname, expected_tokenname)) {
 518                 zconf_error("unexpected '%s' within %s block",
 519                             tokenname, expected_tokenname);
 520                 yynerrs++;
 521                 return false;
 522         }
 523         if (current_menu->file != current_file) {
 524                 zconf_error("'%s' in different file than '%s'",
 525                             tokenname, expected_tokenname);
 526                 fprintf(stderr, "%s:%d: location of the '%s'\n",
 527                         current_menu->file->name, current_menu->lineno,
 528                         expected_tokenname);
 529                 yynerrs++;
 530                 return false;
 531         }
 532         return true;
 533 }
 534
 535 static void zconfprint(const char *err, ...)
 536 {
 537         va_list ap;
 538
 539         fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
 540         va_start(ap, err);
 541         vfprintf(stderr, err, ap);
 542         va_end(ap);
 543         fprintf(stderr, "\n");
 544 }
 545
 546 static void zconf_error(const char *err, ...)
 547 {
 548         va_list ap;
 549
 550         yynerrs++;
 551         fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
 552         va_start(ap, err);
 553         vfprintf(stderr, err, ap);
 554         va_end(ap);
 555         fprintf(stderr, "\n");
 556 }
 557
 558 static void yyerror(const char *err)
 559 {
 560         fprintf(stderr, "%s:%d: %s\n", zconf_curname(), zconf_lineno() + 1, err);
 561 }
 562
 563 static void print_quoted_string(FILE *out, const char *str)
 564 {
 565         const char *p;
 566         int len;
 567
 568         putc('"', out);
 569         while ((p = strchr(str, '"'))) {
 570                 len = p - str;
 571                 if (len)
 572                         fprintf(out, "%.*s", len, str);
 573                 fputs("\\\"", out);
 574                 str = p + 1;
 575         }
 576         fputs(str, out);
 577         putc('"', out);
 578 }
 579
 580 static void print_symbol(FILE *out, struct menu *menu)
 581 {
 582         struct symbol *sym = menu->sym;
 583         struct property *prop;
 584
 585         if (sym_is_choice(sym))
 586                 fprintf(out, "\nchoice\n");
 587         else
 588                 fprintf(out, "\nconfig %s\n", sym->name);
 589         switch (sym->type) {
 590         case S_BOOLEAN:
 591                 fputs("  bool\n", out);
 592                 break;
 593         case S_TRISTATE:
 594                 fputs("  tristate\n", out);
 595                 break;
 596         case S_STRING:
 597                 fputs("  string\n", out);
 598                 break;
 599         case S_INT:
 600                 fputs("  integer\n", out);
 601                 break;
 602         case S_HEX:
 603                 fputs("  hex\n", out);
 604                 break;
 605         default:
 606                 fputs("  ???\n", out);
 607                 break;
 608         }
 609         for (prop = sym->prop; prop; prop = prop->next) {
 610                 if (prop->menu != menu)
 611                         continue;
 612                 switch (prop->type) {
 613                 case P_PROMPT:
 614                         fputs("  prompt ", out);
 615                         print_quoted_string(out, prop->text);
 616                         if (!expr_is_yes(prop->visible.expr)) {
 617                                 fputs(" if ", out);
 618                                 expr_fprint(prop->visible.expr, out);
 619                         }
 620                         fputc('\n', out);
 621                         break;
 622                 case P_DEFAULT:
 623                         fputs( "  default ", out);
 624                         expr_fprint(prop->expr, out);
 625                         if (!expr_is_yes(prop->visible.expr)) {
 626                                 fputs(" if ", out);
 627                                 expr_fprint(prop->visible.expr, out);
 628                         }
 629                         fputc('\n', out);
 630                         break;
 631                 case P_CHOICE:
 632                         fputs("  #choice value\n", out);
 633                         break;
 634                 case P_SELECT:
 635                         fputs( "  select ", out);
 636                         expr_fprint(prop->expr, out);
 637                         fputc('\n', out);
 638                         break;
 639                 case P_IMPLY:
 640                         fputs( "  imply ", out);
 641                         expr_fprint(prop->expr, out);
 642                         fputc('\n', out);
 643                         break;
 644                 case P_RANGE:
 645                         fputs( "  range ", out);
 646                         expr_fprint(prop->expr, out);
 647                         fputc('\n', out);
 648                         break;
 649                 case P_MENU:
 650                         fputs( "  menu ", out);
 651                         print_quoted_string(out, prop->text);
 652                         fputc('\n', out);
 653                         break;
 654                 case P_SYMBOL:
 655                         fputs( "  symbol ", out);
 656                         fprintf(out, "%s\n", prop->menu->sym->name);
 657                         break;
 658                 default:
 659                         fprintf(out, "  unknown prop %d!\n", prop->type);
 660                         break;
 661                 }
 662         }
 663         if (menu->help) {
 664                 int len = strlen(menu->help);
 665                 while (menu->help[--len] == '\n')
 666                         menu->help[len] = 0;
 667                 fprintf(out, "  help\n%s\n", menu->help);
 668         }
 669 }
 670
 671 void zconfdump(FILE *out)
 672 {
 673         struct property *prop;
 674         struct symbol *sym;
 675         struct menu *menu;
 676
 677         menu = rootmenu.list;
 678         while (menu) {
 679                 if ((sym = menu->sym))
 680                         print_symbol(out, menu);
 681                 else if ((prop = menu->prompt)) {
 682                         switch (prop->type) {
 683                         case P_COMMENT:
 684                                 fputs("\ncomment ", out);
 685                                 print_quoted_string(out, prop->text);
 686                                 fputs("\n", out);
 687                                 break;
 688                         case P_MENU:
 689                                 fputs("\nmenu ", out);
 690                                 print_quoted_string(out, prop->text);
 691                                 fputs("\n", out);
 692                                 break;
 693                         default:
 694                                 ;
 695                         }
 696                         if (!expr_is_yes(prop->visible.expr)) {
 697                                 fputs("  depends ", out);
 698                                 expr_fprint(prop->visible.expr, out);
 699                                 fputc('\n', out);
 700                         }
 701                 }
 702
 703                 if (menu->list)
 704                         menu = menu->list;
 705                 else if (menu->next)
 706                         menu = menu->next;
 707                 else while ((menu = menu->parent)) {
 708                         if (menu->prompt && menu->prompt->type == P_MENU)
 709                                 fputs("\nendmenu\n", out);
 710                         if (menu->next) {
 711                                 menu = menu->next;
 712                                 break;
 713                         }
 714                 }
 715         }
 716 }