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