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