scripts/kconfig/zconf.y

   1 %{
   2 /*
   3  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
   4  * Released under the terms of the GNU GPL v2.0.
   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 #define LKC_DIRECT_LINK
  15 #include "lkc.h"
  16
  17 #include "zconf.hash.c"
  18
  19 #define printd(mask, fmt...) if (cdebug & (mask)) printf(fmt)
  20
  21 #define PRINTD          0x0001
  22 #define DEBUG_PARSE     0x0002
  23
  24 int cdebug = PRINTD;
  25
  26 extern int zconflex(void);
  27 static void zconfprint(const char *err, ...);
  28 static void zconf_error(const char *err, ...);
  29 static void zconferror(const char *err);
  30 static bool zconf_endtoken(struct kconf_id *id, int starttoken, int endtoken);
  31
  32 struct symbol *symbol_hash[257];
  33
  34 static struct menu *current_menu, *current_entry;
  35
  36 #define YYDEBUG 0
  37 #if YYDEBUG
  38 #define YYERROR_VERBOSE
  39 #endif
  40 %}
  41 %expect 26
  42
  43 %union
  44 {
  45         char *string;
  46         struct file *file;
  47         struct symbol *symbol;
  48         struct expr *expr;
  49         struct menu *menu;
  50         struct kconf_id *id;
  51 }
  52
  53 %token <id>T_MAINMENU
  54 %token <id>T_MENU
  55 %token <id>T_ENDMENU
  56 %token <id>T_SOURCE
  57 %token <id>T_CHOICE
  58 %token <id>T_ENDCHOICE
  59 %token <id>T_COMMENT
  60 %token <id>T_CONFIG
  61 %token <id>T_MENUCONFIG
  62 %token <id>T_HELP
  63 %token <string> T_HELPTEXT
  64 %token <id>T_IF
  65 %token <id>T_ENDIF
  66 %token <id>T_DEPENDS
  67 %token <id>T_OPTIONAL
  68 %token <id>T_PROMPT
  69 %token <id>T_TYPE
  70 %token <id>T_DEFAULT
  71 %token <id>T_SELECT
  72 %token <id>T_RANGE
  73 %token <id>T_OPTION
  74 %token <id>T_ON
  75 %token <string> T_WORD
  76 %token <string> T_WORD_QUOTE
  77 %token T_UNEQUAL
  78 %token T_CLOSE_PAREN
  79 %token T_OPEN_PAREN
  80 %token T_EOL
  81
  82 %left T_OR
  83 %left T_AND
  84 %left T_EQUAL T_UNEQUAL
  85 %nonassoc T_NOT
  86
  87 %type <string> prompt
  88 %type <symbol> symbol
  89 %type <expr> expr
  90 %type <expr> if_expr
  91 %type <id> end
  92 %type <id> option_name
  93 %type <menu> if_entry menu_entry choice_entry
  94 %type <string> symbol_option_arg word_opt
  95
  96 %destructor {
  97         fprintf(stderr, "%s:%d: missing end statement for this entry\n",
  98                 $$->file->name, $$->lineno);
  99         if (current_menu == $$)
 100                 menu_end_menu();
 101 } if_entry menu_entry choice_entry
 102
 103 %%
 104 input: stmt_list;
 105
 106 stmt_list:
 107           /* empty */
 108         | stmt_list common_stmt
 109         | stmt_list choice_stmt
 110         | stmt_list menu_stmt
 111         | stmt_list T_MAINMENU prompt nl
 112         | stmt_list end                 { zconf_error("unexpected end statement"); }
 113         | stmt_list T_WORD error T_EOL  { zconf_error("unknown statement \"%s\"", $2); }
 114         | stmt_list option_name error T_EOL
 115 {
 116         zconf_error("unexpected option \"%s\"", kconf_id_strings + $2->name);
 117 }
 118         | stmt_list error T_EOL         { zconf_error("invalid statement"); }
 119 ;
 120
 121 option_name:
 122         T_DEPENDS | T_PROMPT | T_TYPE | T_SELECT | T_OPTIONAL | T_RANGE | T_DEFAULT
 123 ;
 124
 125 common_stmt:
 126           T_EOL
 127         | if_stmt
 128         | comment_stmt
 129         | config_stmt
 130         | menuconfig_stmt
 131         | source_stmt
 132 ;
 133
 134 option_error:
 135           T_WORD error T_EOL            { zconf_error("unknown option \"%s\"", $1); }
 136         | error T_EOL                   { zconf_error("invalid option"); }
 137 ;
 138
 139
 140 /* config/menuconfig entry */
 141
 142 config_entry_start: T_CONFIG T_WORD T_EOL
 143 {
 144         struct symbol *sym = sym_lookup($2, 0);
 145         sym->flags |= SYMBOL_OPTIONAL;
 146         menu_add_entry(sym);
 147         printd(DEBUG_PARSE, "%s:%d:config %s\n", zconf_curname(), zconf_lineno(), $2);
 148 };
 149
 150 config_stmt: config_entry_start config_option_list
 151 {
 152         menu_end_entry();
 153         printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
 154 };
 155
 156 menuconfig_entry_start: T_MENUCONFIG T_WORD T_EOL
 157 {
 158         struct symbol *sym = sym_lookup($2, 0);
 159         sym->flags |= SYMBOL_OPTIONAL;
 160         menu_add_entry(sym);
 161         printd(DEBUG_PARSE, "%s:%d:menuconfig %s\n", zconf_curname(), zconf_lineno(), $2);
 162 };
 163
 164 menuconfig_stmt: menuconfig_entry_start config_option_list
 165 {
 166         if (current_entry->prompt)
 167                 current_entry->prompt->type = P_MENU;
 168         else
 169                 zconfprint("warning: menuconfig statement without prompt");
 170         menu_end_entry();
 171         printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
 172 };
 173
 174 config_option_list:
 175           /* empty */
 176         | config_option_list config_option
 177         | config_option_list symbol_option
 178         | config_option_list depends
 179         | config_option_list help
 180         | config_option_list option_error
 181         | config_option_list T_EOL
 182 ;
 183
 184 config_option: T_TYPE prompt_stmt_opt T_EOL
 185 {
 186         menu_set_type($1->stype);
 187         printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
 188                 zconf_curname(), zconf_lineno(),
 189                 $1->stype);
 190 };
 191
 192 config_option: T_PROMPT prompt if_expr T_EOL
 193 {
 194         menu_add_prompt(P_PROMPT, $2, $3);
 195         printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
 196 };
 197
 198 config_option: T_DEFAULT expr if_expr T_EOL
 199 {
 200         menu_add_expr(P_DEFAULT, $2, $3);
 201         if ($1->stype != S_UNKNOWN)
 202                 menu_set_type($1->stype);
 203         printd(DEBUG_PARSE, "%s:%d:default(%u)\n",
 204                 zconf_curname(), zconf_lineno(),
 205                 $1->stype);
 206 };
 207
 208 config_option: T_SELECT T_WORD if_expr T_EOL
 209 {
 210         menu_add_symbol(P_SELECT, sym_lookup($2, 0), $3);
 211         printd(DEBUG_PARSE, "%s:%d:select\n", zconf_curname(), zconf_lineno());
 212 };
 213
 214 config_option: T_RANGE symbol symbol if_expr T_EOL
 215 {
 216         menu_add_expr(P_RANGE, expr_alloc_comp(E_RANGE,$2, $3), $4);
 217         printd(DEBUG_PARSE, "%s:%d:range\n", zconf_curname(), zconf_lineno());
 218 };
 219
 220 symbol_option: T_OPTION symbol_option_list T_EOL
 221 ;
 222
 223 symbol_option_list:
 224           /* empty */
 225         | symbol_option_list T_WORD symbol_option_arg
 226 {
 227         struct kconf_id *id = kconf_id_lookup($2, strlen($2));
 228         if (id && id->flags & TF_OPTION)
 229                 menu_add_option(id->token, $3);
 230         else
 231                 zconfprint("warning: ignoring unknown option %s", $2);
 232         free($2);
 233 };
 234
 235 symbol_option_arg:
 236           /* empty */           { $$ = NULL; }
 237         | T_EQUAL prompt        { $$ = $2; }
 238 ;
 239
 240 /* choice entry */
 241
 242 choice: T_CHOICE word_opt T_EOL
 243 {
 244         struct symbol *sym = sym_lookup($2, SYMBOL_CHOICE);
 245         sym->flags |= SYMBOL_AUTO;
 246         menu_add_entry(sym);
 247         menu_add_expr(P_CHOICE, NULL, NULL);
 248         printd(DEBUG_PARSE, "%s:%d:choice\n", zconf_curname(), zconf_lineno());
 249 };
 250
 251 choice_entry: choice choice_option_list
 252 {
 253         $$ = menu_add_menu();
 254 };
 255
 256 choice_end: end
 257 {
 258         if (zconf_endtoken($1, T_CHOICE, T_ENDCHOICE)) {
 259                 menu_end_menu();
 260                 printd(DEBUG_PARSE, "%s:%d:endchoice\n", zconf_curname(), zconf_lineno());
 261         }
 262 };
 263
 264 choice_stmt: choice_entry choice_block choice_end
 265 ;
 266
 267 choice_option_list:
 268           /* empty */
 269         | choice_option_list choice_option
 270         | choice_option_list depends
 271         | choice_option_list help
 272         | choice_option_list T_EOL
 273         | choice_option_list option_error
 274 ;
 275
 276 choice_option: T_PROMPT prompt if_expr T_EOL
 277 {
 278         menu_add_prompt(P_PROMPT, $2, $3);
 279         printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
 280 };
 281
 282 choice_option: T_TYPE prompt_stmt_opt T_EOL
 283 {
 284         if ($1->stype == S_BOOLEAN || $1->stype == S_TRISTATE) {
 285                 menu_set_type($1->stype);
 286                 printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
 287                         zconf_curname(), zconf_lineno(),
 288                         $1->stype);
 289         } else
 290                 YYERROR;
 291 };
 292
 293 choice_option: T_OPTIONAL T_EOL
 294 {
 295         current_entry->sym->flags |= SYMBOL_OPTIONAL;
 296         printd(DEBUG_PARSE, "%s:%d:optional\n", zconf_curname(), zconf_lineno());
 297 };
 298
 299 choice_option: T_DEFAULT T_WORD if_expr T_EOL
 300 {
 301         if ($1->stype == S_UNKNOWN) {
 302                 menu_add_symbol(P_DEFAULT, sym_lookup($2, 0), $3);
 303                 printd(DEBUG_PARSE, "%s:%d:default\n",
 304                         zconf_curname(), zconf_lineno());
 305         } else
 306                 YYERROR;
 307 };
 308
 309 choice_block:
 310           /* empty */
 311         | choice_block common_stmt
 312 ;
 313
 314 /* if entry */
 315
 316 if_entry: T_IF expr nl
 317 {
 318         printd(DEBUG_PARSE, "%s:%d:if\n", zconf_curname(), zconf_lineno());
 319         menu_add_entry(NULL);
 320         menu_add_dep($2);
 321         $$ = menu_add_menu();
 322 };
 323
 324 if_end: end
 325 {
 326         if (zconf_endtoken($1, T_IF, T_ENDIF)) {
 327                 menu_end_menu();
 328                 printd(DEBUG_PARSE, "%s:%d:endif\n", zconf_curname(), zconf_lineno());
 329         }
 330 };
 331
 332 if_stmt: if_entry if_block if_end
 333 ;
 334
 335 if_block:
 336           /* empty */
 337         | if_block common_stmt
 338         | if_block menu_stmt
 339         | if_block choice_stmt
 340 ;
 341
 342 /* menu entry */
 343
 344 menu: T_MENU prompt T_EOL
 345 {
 346         menu_add_entry(NULL);
 347         menu_add_prompt(P_MENU, $2, NULL);
 348         printd(DEBUG_PARSE, "%s:%d:menu\n", zconf_curname(), zconf_lineno());
 349 };
 350
 351 menu_entry: menu depends_list
 352 {
 353         $$ = menu_add_menu();
 354 };
 355
 356 menu_end: end
 357 {
 358         if (zconf_endtoken($1, T_MENU, T_ENDMENU)) {
 359                 menu_end_menu();
 360                 printd(DEBUG_PARSE, "%s:%d:endmenu\n", zconf_curname(), zconf_lineno());
 361         }
 362 };
 363
 364 menu_stmt: menu_entry menu_block menu_end
 365 ;
 366
 367 menu_block:
 368           /* empty */
 369         | menu_block common_stmt
 370         | menu_block menu_stmt
 371         | menu_block choice_stmt
 372 ;
 373
 374 source_stmt: T_SOURCE prompt T_EOL
 375 {
 376         printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), $2);
 377         zconf_nextfile($2);
 378 };
 379
 380 /* comment entry */
 381
 382 comment: T_COMMENT prompt T_EOL
 383 {
 384         menu_add_entry(NULL);
 385         menu_add_prompt(P_COMMENT, $2, NULL);
 386         printd(DEBUG_PARSE, "%s:%d:comment\n", zconf_curname(), zconf_lineno());
 387 };
 388
 389 comment_stmt: comment depends_list
 390 {
 391         menu_end_entry();
 392 };
 393
 394 /* help option */
 395
 396 help_start: T_HELP T_EOL
 397 {
 398         printd(DEBUG_PARSE, "%s:%d:help\n", zconf_curname(), zconf_lineno());
 399         zconf_starthelp();
 400 };
 401
 402 help: help_start T_HELPTEXT
 403 {
 404         current_entry->help = $2;
 405 };
 406
 407 /* depends option */
 408
 409 depends_list:
 410           /* empty */
 411         | depends_list depends
 412         | depends_list T_EOL
 413         | depends_list option_error
 414 ;
 415
 416 depends: T_DEPENDS T_ON expr T_EOL
 417 {
 418         menu_add_dep($3);
 419         printd(DEBUG_PARSE, "%s:%d:depends on\n", zconf_curname(), zconf_lineno());
 420 };
 421
 422 /* prompt statement */
 423
 424 prompt_stmt_opt:
 425           /* empty */
 426         | prompt if_expr
 427 {
 428         menu_add_prompt(P_PROMPT, $1, $2);
 429 };
 430
 431 prompt:   T_WORD
 432         | T_WORD_QUOTE
 433 ;
 434
 435 end:      T_ENDMENU T_EOL       { $$ = $1; }
 436         | T_ENDCHOICE T_EOL     { $$ = $1; }
 437         | T_ENDIF T_EOL         { $$ = $1; }
 438 ;
 439
 440 nl:
 441           T_EOL
 442         | nl T_EOL
 443 ;
 444
 445 if_expr:  /* empty */                   { $$ = NULL; }
 446         | T_IF expr                     { $$ = $2; }
 447 ;
 448
 449 expr:     symbol                                { $$ = expr_alloc_symbol($1); }
 450         | symbol T_EQUAL symbol                 { $$ = expr_alloc_comp(E_EQUAL, $1, $3); }
 451         | symbol T_UNEQUAL symbol               { $$ = expr_alloc_comp(E_UNEQUAL, $1, $3); }
 452         | T_OPEN_PAREN expr T_CLOSE_PAREN       { $$ = $2; }
 453         | T_NOT expr                            { $$ = expr_alloc_one(E_NOT, $2); }
 454         | expr T_OR expr                        { $$ = expr_alloc_two(E_OR, $1, $3); }
 455         | expr T_AND expr                       { $$ = expr_alloc_two(E_AND, $1, $3); }
 456 ;
 457
 458 symbol:   T_WORD        { $$ = sym_lookup($1, 0); free($1); }
 459         | T_WORD_QUOTE  { $$ = sym_lookup($1, SYMBOL_CONST); free($1); }
 460 ;
 461
 462 word_opt: /* empty */                   { $$ = NULL; }
 463         | T_WORD
 464
 465 %%
 466
 467 void conf_parse(const char *name)
 468 {
 469         struct symbol *sym;
 470         int i;
 471
 472         zconf_initscan(name);
 473
 474         sym_init();
 475         menu_init();
 476         modules_sym = sym_lookup(NULL, 0);
 477         modules_sym->type = S_BOOLEAN;
 478         modules_sym->flags |= SYMBOL_AUTO;
 479         rootmenu.prompt = menu_add_prompt(P_MENU, "Linux Kernel Configuration", NULL);
 480
 481 #if YYDEBUG
 482         if (getenv("ZCONF_DEBUG"))
 483                 zconfdebug = 1;
 484 #endif
 485         zconfparse();
 486         if (zconfnerrs)
 487                 exit(1);
 488         if (!modules_sym->prop) {
 489                 struct property *prop;
 490
 491                 prop = prop_alloc(P_DEFAULT, modules_sym);
 492                 prop->expr = expr_alloc_symbol(sym_lookup("MODULES", 0));
 493         }
 494         menu_finalize(&rootmenu);
 495         for_all_symbols(i, sym) {
 496                 if (sym_check_deps(sym))
 497                         zconfnerrs++;
 498         }
 499         if (zconfnerrs)
 500                 exit(1);
 501         sym_set_change_count(1);
 502 }
 503
 504 const char *zconf_tokenname(int token)
 505 {
 506         switch (token) {
 507         case T_MENU:            return "menu";
 508         case T_ENDMENU:         return "endmenu";
 509         case T_CHOICE:          return "choice";
 510         case T_ENDCHOICE:       return "endchoice";
 511         case T_IF:              return "if";
 512         case T_ENDIF:           return "endif";
 513         case T_DEPENDS:         return "depends";
 514         }
 515         return "<token>";
 516 }
 517
 518 static bool zconf_endtoken(struct kconf_id *id, int starttoken, int endtoken)
 519 {
 520         if (id->token != endtoken) {
 521                 zconf_error("unexpected '%s' within %s block",
 522                         kconf_id_strings + id->name, zconf_tokenname(starttoken));
 523                 zconfnerrs++;
 524                 return false;
 525         }
 526         if (current_menu->file != current_file) {
 527                 zconf_error("'%s' in different file than '%s'",
 528                         kconf_id_strings + id->name, zconf_tokenname(starttoken));
 529                 fprintf(stderr, "%s:%d: location of the '%s'\n",
 530                         current_menu->file->name, current_menu->lineno,
 531                         zconf_tokenname(starttoken));
 532                 zconfnerrs++;
 533                 return false;
 534         }
 535         return true;
 536 }
 537
 538 static void zconfprint(const char *err, ...)
 539 {
 540         va_list ap;
 541
 542         fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
 543         va_start(ap, err);
 544         vfprintf(stderr, err, ap);
 545         va_end(ap);
 546         fprintf(stderr, "\n");
 547 }
 548
 549 static void zconf_error(const char *err, ...)
 550 {
 551         va_list ap;
 552
 553         zconfnerrs++;
 554         fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
 555         va_start(ap, err);
 556         vfprintf(stderr, err, ap);
 557         va_end(ap);
 558         fprintf(stderr, "\n");
 559 }
 560
 561 static void zconferror(const char *err)
 562 {
 563 #if YYDEBUG
 564         fprintf(stderr, "%s:%d: %s\n", zconf_curname(), zconf_lineno() + 1, err);
 565 #endif
 566 }
 567
 568 void print_quoted_string(FILE *out, const char *str)
 569 {
 570         const char *p;
 571         int len;
 572
 573         putc('"', out);
 574         while ((p = strchr(str, '"'))) {
 575                 len = p - str;
 576                 if (len)
 577                         fprintf(out, "%.*s", len, str);
 578                 fputs("\\\"", out);
 579                 str = p + 1;
 580         }
 581         fputs(str, out);
 582         putc('"', out);
 583 }
 584
 585 void print_symbol(FILE *out, struct menu *menu)
 586 {
 587         struct symbol *sym = menu->sym;
 588         struct property *prop;
 589
 590         if (sym_is_choice(sym))
 591                 fprintf(out, "choice\n");
 592         else
 593                 fprintf(out, "config %s\n", sym->name);
 594         switch (sym->type) {
 595         case S_BOOLEAN:
 596                 fputs("  boolean\n", out);
 597                 break;
 598         case S_TRISTATE:
 599                 fputs("  tristate\n", out);
 600                 break;
 601         case S_STRING:
 602                 fputs("  string\n", out);
 603                 break;
 604         case S_INT:
 605                 fputs("  integer\n", out);
 606                 break;
 607         case S_HEX:
 608                 fputs("  hex\n", out);
 609                 break;
 610         default:
 611                 fputs("  ???\n", out);
 612                 break;
 613         }
 614         for (prop = sym->prop; prop; prop = prop->next) {
 615                 if (prop->menu != menu)
 616                         continue;
 617                 switch (prop->type) {
 618                 case P_PROMPT:
 619                         fputs("  prompt ", out);
 620                         print_quoted_string(out, prop->text);
 621                         if (!expr_is_yes(prop->visible.expr)) {
 622                                 fputs(" if ", out);
 623                                 expr_fprint(prop->visible.expr, out);
 624                         }
 625                         fputc('\n', out);
 626                         break;
 627                 case P_DEFAULT:
 628                         fputs( "  default ", out);
 629                         expr_fprint(prop->expr, out);
 630                         if (!expr_is_yes(prop->visible.expr)) {
 631                                 fputs(" if ", out);
 632                                 expr_fprint(prop->visible.expr, out);
 633                         }
 634                         fputc('\n', out);
 635                         break;
 636                 case P_CHOICE:
 637                         fputs("  #choice value\n", out);
 638                         break;
 639                 default:
 640                         fprintf(out, "  unknown prop %d!\n", prop->type);
 641                         break;
 642                 }
 643         }
 644         if (menu->help) {
 645                 int len = strlen(menu->help);
 646                 while (menu->help[--len] == '\n')
 647                         menu->help[len] = 0;
 648                 fprintf(out, "  help\n%s\n", menu->help);
 649         }
 650         fputc('\n', out);
 651 }
 652
 653 void zconfdump(FILE *out)
 654 {
 655         struct property *prop;
 656         struct symbol *sym;
 657         struct menu *menu;
 658
 659         menu = rootmenu.list;
 660         while (menu) {
 661                 if ((sym = menu->sym))
 662                         print_symbol(out, menu);
 663                 else if ((prop = menu->prompt)) {
 664                         switch (prop->type) {
 665                         case P_COMMENT:
 666                                 fputs("\ncomment ", out);
 667                                 print_quoted_string(out, prop->text);
 668                                 fputs("\n", out);
 669                                 break;
 670                         case P_MENU:
 671                                 fputs("\nmenu ", out);
 672                                 print_quoted_string(out, prop->text);
 673                                 fputs("\n", out);
 674                                 break;
 675                         default:
 676                                 ;
 677                         }
 678                         if (!expr_is_yes(prop->visible.expr)) {
 679                                 fputs("  depends ", out);
 680                                 expr_fprint(prop->visible.expr, out);
 681                                 fputc('\n', out);
 682                         }
 683                         fputs("\n", out);
 684                 }
 685
 686                 if (menu->list)
 687                         menu = menu->list;
 688                 else if (menu->next)
 689                         menu = menu->next;
 690                 else while ((menu = menu->parent)) {
 691                         if (menu->prompt && menu->prompt->type == P_MENU)
 692                                 fputs("\nendmenu\n", out);
 693                         if (menu->next) {
 694                                 menu = menu->next;
 695                                 break;
 696                         }
 697                 }
 698         }
 699 }
 700
 701 #include "lex.zconf.c"
 702 #include "util.c"
 703 #include "confdata.c"
 704 #include "expr.c"
 705 #include "symbol.c"
 706 #include "menu.c"