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