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_SELECT
  73 %token <id>T_RANGE
  74 %token <id>T_ON
  75 %token <id>T_RESET
  76 %token <string> T_WORD
  77 %token <string> T_WORD_QUOTE
  78 %token T_UNEQUAL
  79 %token T_CLOSE_PAREN
  80 %token T_OPEN_PAREN
  81 %token T_EOL
  82
  83 %left T_OR
  84 %left T_AND
  85 %left T_EQUAL T_UNEQUAL
  86 %nonassoc T_NOT
  87
  88 %type <string> prompt
  89 %type <symbol> symbol
  90 %type <expr> expr
  91 %type <expr> if_expr
  92 %type <id> end
  93 %type <id> option_name
  94 %type <menu> if_entry menu_entry choice_entry
  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 | T_RESET
 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 depends
 178         | config_option_list help
 179         | config_option_list option_error
 180         | config_option_list T_EOL
 181 ;
 182
 183 config_option: T_TYPE prompt_stmt_opt T_EOL
 184 {
 185         menu_set_type($1->stype);
 186         printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
 187                 zconf_curname(), zconf_lineno(),
 188                 $1->stype);
 189 };
 190
 191 config_option: T_PROMPT prompt if_expr T_EOL
 192 {
 193         menu_add_prompt(P_PROMPT, $2, $3);
 194         printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
 195 };
 196
 197 config_option: T_DEFAULT expr if_expr T_EOL
 198 {
 199         menu_add_expr(P_DEFAULT, $2, $3);
 200         if ($1->stype != S_UNKNOWN)
 201                 menu_set_type($1->stype);
 202         printd(DEBUG_PARSE, "%s:%d:default(%u)\n",
 203                 zconf_curname(), zconf_lineno(),
 204                 $1->stype);
 205 };
 206
 207 config_option: T_SELECT T_WORD if_expr T_EOL
 208 {
 209         menu_add_symbol(P_SELECT, sym_lookup($2, 0), $3);
 210         printd(DEBUG_PARSE, "%s:%d:select\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 /* choice entry */
 220
 221 choice: T_CHOICE T_EOL
 222 {
 223         struct symbol *sym = sym_lookup(NULL, 0);
 224         sym->flags |= SYMBOL_CHOICE;
 225         menu_add_entry(sym);
 226         menu_add_expr(P_CHOICE, NULL, NULL);
 227         printd(DEBUG_PARSE, "%s:%d:choice\n", zconf_curname(), zconf_lineno());
 228 };
 229
 230 choice_entry: choice choice_option_list
 231 {
 232         $$ = menu_add_menu();
 233 };
 234
 235 choice_end: end
 236 {
 237         if (zconf_endtoken($1, T_CHOICE, T_ENDCHOICE)) {
 238                 menu_end_menu();
 239                 printd(DEBUG_PARSE, "%s:%d:endchoice\n", zconf_curname(), zconf_lineno());
 240         }
 241 };
 242
 243 choice_stmt: choice_entry choice_block choice_end
 244 ;
 245
 246 choice_option_list:
 247           /* empty */
 248         | choice_option_list choice_option
 249         | choice_option_list depends
 250         | choice_option_list help
 251         | choice_option_list T_EOL
 252         | choice_option_list option_error
 253 ;
 254
 255 choice_option: T_PROMPT prompt if_expr T_EOL
 256 {
 257         menu_add_prompt(P_PROMPT, $2, $3);
 258         printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
 259 };
 260
 261 choice_option: T_TYPE prompt_stmt_opt T_EOL
 262 {
 263         if ($1->stype == S_BOOLEAN || $1->stype == S_TRISTATE) {
 264                 menu_set_type($1->stype);
 265                 printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
 266                         zconf_curname(), zconf_lineno(),
 267                         $1->stype);
 268         } else
 269                 YYERROR;
 270 };
 271
 272 choice_option: T_OPTIONAL T_EOL
 273 {
 274         current_entry->sym->flags |= SYMBOL_OPTIONAL;
 275         printd(DEBUG_PARSE, "%s:%d:optional\n", zconf_curname(), zconf_lineno());
 276 };
 277
 278 choice_option: T_RESET T_EOL
 279 {
 280         current_entry->sym->flags |= SYMBOL_RESET;
 281 };
 282
 283 choice_option: T_DEFAULT T_WORD if_expr T_EOL
 284 {
 285         if ($1->stype == S_UNKNOWN) {
 286                 menu_add_symbol(P_DEFAULT, sym_lookup($2, 0), $3);
 287                 printd(DEBUG_PARSE, "%s:%d:default\n",
 288                         zconf_curname(), zconf_lineno());
 289         } else
 290                 YYERROR;
 291 };
 292
 293 choice_block:
 294           /* empty */
 295         | choice_block common_stmt
 296 ;
 297
 298 /* if entry */
 299
 300 if_entry: T_IF expr nl
 301 {
 302         printd(DEBUG_PARSE, "%s:%d:if\n", zconf_curname(), zconf_lineno());
 303         menu_add_entry(NULL);
 304         menu_add_dep($2);
 305         $$ = menu_add_menu();
 306 };
 307
 308 if_end: end
 309 {
 310         if (zconf_endtoken($1, T_IF, T_ENDIF)) {
 311                 menu_end_menu();
 312                 printd(DEBUG_PARSE, "%s:%d:endif\n", zconf_curname(), zconf_lineno());
 313         }
 314 };
 315
 316 if_stmt: if_entry if_block if_end
 317 ;
 318
 319 if_block:
 320           /* empty */
 321         | if_block common_stmt
 322         | if_block menu_stmt
 323         | if_block choice_stmt
 324 ;
 325
 326 /* menu entry */
 327
 328 menu: T_MENU prompt T_EOL
 329 {
 330         menu_add_entry(NULL);
 331         menu_add_prompt(P_MENU, $2, NULL);
 332         printd(DEBUG_PARSE, "%s:%d:menu\n", zconf_curname(), zconf_lineno());
 333 };
 334
 335 menu_entry: menu depends_list
 336 {
 337         $$ = menu_add_menu();
 338 };
 339
 340 menu_end: end
 341 {
 342         if (zconf_endtoken($1, T_MENU, T_ENDMENU)) {
 343                 menu_end_menu();
 344                 printd(DEBUG_PARSE, "%s:%d:endmenu\n", zconf_curname(), zconf_lineno());
 345         }
 346 };
 347
 348 menu_stmt: menu_entry menu_block menu_end
 349 ;
 350
 351 menu_block:
 352           /* empty */
 353         | menu_block common_stmt
 354         | menu_block menu_stmt
 355         | menu_block choice_stmt
 356 ;
 357
 358 source_stmt: T_SOURCE prompt T_EOL
 359 {
 360         printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), $2);
 361         zconf_nextfile($2);
 362 };
 363
 364 /* comment entry */
 365
 366 comment: T_COMMENT prompt T_EOL
 367 {
 368         menu_add_entry(NULL);
 369         menu_add_prompt(P_COMMENT, $2, NULL);
 370         printd(DEBUG_PARSE, "%s:%d:comment\n", zconf_curname(), zconf_lineno());
 371 };
 372
 373 comment_stmt: comment depends_list
 374 {
 375         menu_end_entry();
 376 };
 377
 378 /* help option */
 379
 380 help_start: T_HELP T_EOL
 381 {
 382         printd(DEBUG_PARSE, "%s:%d:help\n", zconf_curname(), zconf_lineno());
 383         zconf_starthelp();
 384 };
 385
 386 help: help_start T_HELPTEXT
 387 {
 388         current_entry->sym->help = $2;
 389 };
 390
 391 /* depends option */
 392
 393 depends_list:
 394           /* empty */
 395         | depends_list depends
 396         | depends_list T_EOL
 397         | depends_list option_error
 398 ;
 399
 400 depends: T_DEPENDS T_ON expr T_EOL
 401 {
 402         menu_add_dep($3);
 403         printd(DEBUG_PARSE, "%s:%d:depends on\n", zconf_curname(), zconf_lineno());
 404 }
 405         | T_DEPENDS expr T_EOL
 406 {
 407         menu_add_dep($2);
 408         printd(DEBUG_PARSE, "%s:%d:depends\n", zconf_curname(), zconf_lineno());
 409 }
 410         | T_REQUIRES expr T_EOL
 411 {
 412         menu_add_dep($2);
 413         printd(DEBUG_PARSE, "%s:%d:requires\n", zconf_curname(), zconf_lineno());
 414 };
 415
 416 /* prompt statement */
 417
 418 prompt_stmt_opt:
 419           /* empty */
 420         | prompt if_expr
 421 {
 422         menu_add_prompt(P_PROMPT, $1, $2);
 423 };
 424
 425 prompt:   T_WORD
 426         | T_WORD_QUOTE
 427 ;
 428
 429 end:      T_ENDMENU T_EOL       { $$ = $1; }
 430         | T_ENDCHOICE T_EOL     { $$ = $1; }
 431         | T_ENDIF T_EOL         { $$ = $1; }
 432 ;
 433
 434 nl:
 435           T_EOL
 436         | nl T_EOL
 437 ;
 438
 439 if_expr:  /* empty */                   { $$ = NULL; }
 440         | T_IF expr                     { $$ = $2; }
 441 ;
 442
 443 expr:     symbol                                { $$ = expr_alloc_symbol($1); }
 444         | symbol T_EQUAL symbol                 { $$ = expr_alloc_comp(E_EQUAL, $1, $3); }
 445         | symbol T_UNEQUAL symbol               { $$ = expr_alloc_comp(E_UNEQUAL, $1, $3); }
 446         | T_OPEN_PAREN expr T_CLOSE_PAREN       { $$ = $2; }
 447         | T_NOT expr                            { $$ = expr_alloc_one(E_NOT, $2); }
 448         | expr T_OR expr                        { $$ = expr_alloc_two(E_OR, $1, $3); }
 449         | expr T_AND expr                       { $$ = expr_alloc_two(E_AND, $1, $3); }
 450 ;
 451
 452 symbol:   T_WORD        { $$ = sym_lookup($1, 0); free($1); }
 453         | T_WORD_QUOTE  { $$ = sym_lookup($1, 1); free($1); }
 454 ;
 455
 456 %%
 457
 458 void conf_parse(const char *name)
 459 {
 460         struct symbol *sym;
 461         int i;
 462
 463         zconf_initscan(name);
 464
 465         sym_init();
 466         menu_init();
 467         modules_sym = sym_lookup("MODULES", 0);
 468         rootmenu.prompt = menu_add_prompt(P_MENU, "OpenWrt Configuration", NULL);
 469
 470 #if YYDEBUG
 471         if (getenv("ZCONF_DEBUG"))
 472                 zconfdebug = 1;
 473 #endif
 474         zconfparse();
 475         if (zconfnerrs)
 476                 exit(1);
 477         menu_finalize(&rootmenu);
 478         for_all_symbols(i, sym) {
 479                 sym_check_deps(sym);
 480         }
 481
 482         sym_change_count = 1;
 483 }
 484
 485 const char *zconf_tokenname(int token)
 486 {
 487         switch (token) {
 488         case T_MENU:            return "menu";
 489         case T_ENDMENU:         return "endmenu";
 490         case T_CHOICE:          return "choice";
 491         case T_ENDCHOICE:       return "endchoice";
 492         case T_IF:              return "if";
 493         case T_ENDIF:           return "endif";
 494         case T_DEPENDS:         return "depends";
 495         }
 496         return "<token>";
 497 }
 498
 499 static bool zconf_endtoken(struct kconf_id *id, int starttoken, int endtoken)
 500 {
 501         if (id->token != endtoken) {
 502                 zconf_error("unexpected '%s' within %s block",
 503                         kconf_id_strings + id->name, zconf_tokenname(starttoken));
 504                 zconfnerrs++;
 505                 return false;
 506         }
 507         if (current_menu->file != current_file) {
 508                 zconf_error("'%s' in different file than '%s'",
 509                         kconf_id_strings + id->name, zconf_tokenname(starttoken));
 510                 fprintf(stderr, "%s:%d: location of the '%s'\n",
 511                         current_menu->file->name, current_menu->lineno,
 512                         zconf_tokenname(starttoken));
 513                 zconfnerrs++;
 514                 return false;
 515         }
 516         return true;
 517 }
 518
 519 static void zconfprint(const char *err, ...)
 520 {
 521         va_list ap;
 522
 523         fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
 524         va_start(ap, err);
 525         vfprintf(stderr, err, ap);
 526         va_end(ap);
 527         fprintf(stderr, "\n");
 528 }
 529
 530 static void zconf_error(const char *err, ...)
 531 {
 532         va_list ap;
 533
 534         zconfnerrs++;
 535         fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
 536         va_start(ap, err);
 537         vfprintf(stderr, err, ap);
 538         va_end(ap);
 539         fprintf(stderr, "\n");
 540 }
 541
 542 static void zconferror(const char *err)
 543 {
 544 #if YYDEBUG
 545         fprintf(stderr, "%s:%d: %s\n", zconf_curname(), zconf_lineno() + 1, err);
 546 #endif
 547 }
 548
 549 void print_quoted_string(FILE *out, const char *str)
 550 {
 551         const char *p;
 552         int len;
 553
 554         putc('"', out);
 555         while ((p = strchr(str, '"'))) {
 556                 len = p - str;
 557                 if (len)
 558                         fprintf(out, "%.*s", len, str);
 559                 fputs("\\\"", out);
 560                 str = p + 1;
 561         }
 562         fputs(str, out);
 563         putc('"', out);
 564 }
 565
 566 void print_symbol(FILE *out, struct menu *menu)
 567 {
 568         struct symbol *sym = menu->sym;
 569         struct property *prop;
 570
 571         if (sym_is_choice(sym))
 572                 fprintf(out, "choice\n");
 573         else
 574                 fprintf(out, "config %s\n", sym->name);
 575         switch (sym->type) {
 576         case S_BOOLEAN:
 577                 fputs("  boolean\n", out);
 578                 break;
 579         case S_TRISTATE:
 580                 fputs("  tristate\n", out);
 581                 break;
 582         case S_STRING:
 583                 fputs("  string\n", out);
 584                 break;
 585         case S_INT:
 586                 fputs("  integer\n", out);
 587                 break;
 588         case S_HEX:
 589                 fputs("  hex\n", out);
 590                 break;
 591         default:
 592                 fputs("  ???\n", out);
 593                 break;
 594         }
 595         for (prop = sym->prop; prop; prop = prop->next) {
 596                 if (prop->menu != menu)
 597                         continue;
 598                 switch (prop->type) {
 599                 case P_PROMPT:
 600                         fputs("  prompt ", out);
 601                         print_quoted_string(out, prop->text);
 602                         if (!expr_is_yes(prop->visible.expr)) {
 603                                 fputs(" if ", out);
 604                                 expr_fprint(prop->visible.expr, out);
 605                         }
 606                         fputc('\n', out);
 607                         break;
 608                 case P_DEFAULT:
 609                         fputs( "  default ", out);
 610                         expr_fprint(prop->expr, out);
 611                         if (!expr_is_yes(prop->visible.expr)) {
 612                                 fputs(" if ", out);
 613                                 expr_fprint(prop->visible.expr, out);
 614                         }
 615                         fputc('\n', out);
 616                         break;
 617                 case P_CHOICE:
 618                         fputs("  #choice value\n", out);
 619                         break;
 620                 default:
 621                         fprintf(out, "  unknown prop %d!\n", prop->type);
 622                         break;
 623                 }
 624         }
 625         if (sym->help) {
 626                 int len = strlen(sym->help);
 627                 while (sym->help[--len] == '\n')
 628                         sym->help[len] = 0;
 629                 fprintf(out, "  help\n%s\n", sym->help);
 630         }
 631         fputc('\n', out);
 632 }
 633
 634 void zconfdump(FILE *out)
 635 {
 636         struct property *prop;
 637         struct symbol *sym;
 638         struct menu *menu;
 639
 640         menu = rootmenu.list;
 641         while (menu) {
 642                 if ((sym = menu->sym))
 643                         print_symbol(out, menu);
 644                 else if ((prop = menu->prompt)) {
 645                         switch (prop->type) {
 646                         case P_COMMENT:
 647                                 fputs("\ncomment ", out);
 648                                 print_quoted_string(out, prop->text);
 649                                 fputs("\n", out);
 650                                 break;
 651                         case P_MENU:
 652                                 fputs("\nmenu ", out);
 653                                 print_quoted_string(out, prop->text);
 654                                 fputs("\n", out);
 655                                 break;
 656                         default:
 657                                 ;
 658                         }
 659                         if (!expr_is_yes(prop->visible.expr)) {
 660                                 fputs("  depends ", out);
 661                                 expr_fprint(prop->visible.expr, out);
 662                                 fputc('\n', out);
 663                         }
 664                         fputs("\n", out);
 665                 }
 666
 667                 if (menu->list)
 668                         menu = menu->list;
 669                 else if (menu->next)
 670                         menu = menu->next;
 671                 else while ((menu = menu->parent)) {
 672                         if (menu->prompt && menu->prompt->type == P_MENU)
 673                                 fputs("\nendmenu\n", out);
 674                         if (menu->next) {
 675                                 menu = menu->next;
 676                                 break;
 677                         }
 678                 }
 679         }
 680 }
 681
 682 #include "lex.zconf.c"
 683 #include "util.c"
 684 #include "confdata.c"
 685 #include "expr.c"
 686 #include "symbol.c"
 687 #include "menu.c"