1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2002 Roman Zippel <[email protected]> 4 */ 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 #include "lkc.h" 15 #include "internal.h" 16 #include "preprocess.h" 17 18 #define printd(mask, fmt...) if (cdebug & (mask)) printf(fmt) 19 20 #define PRINTD 0x0001 21 #define DEBUG_PARSE 0x0002 22 23 int cdebug = PRINTD; 24 25 static void yyerror(const char *err); 26 static void zconfprint(const char *err, ...); 27 static void zconf_error(const char *err, ...); 28 static bool zconf_endtoken(const char *tokenname, 29 const char *expected_tokenname); 30 31 struct menu *current_menu, *current_entry; 32 33 %} 34 35 %union 36 { 37 char *string; 38 struct symbol *symbol; 39 struct expr *expr; 40 struct menu *menu; 41 enum symbol_type type; 42 enum variable_flavor flavor; 43 } 44 45 %token <string> T_HELPTEXT 46 %token <string> T_WORD 47 %token <string> T_WORD_QUOTE 48 %token T_BOOL 49 %token T_CHOICE 50 %token T_CLOSE_PAREN 51 %token T_COLON_EQUAL 52 %token T_COMMENT 53 %token T_CONFIG 54 %token T_DEFAULT 55 %token T_DEF_BOOL 56 %token T_DEF_TRISTATE 57 %token T_DEPENDS 58 %token T_ENDCHOICE 59 %token T_ENDIF 60 %token T_ENDMENU 61 %token T_HELP 62 %token T_HEX 63 %token T_IF 64 %token T_IMPLY 65 %token T_INT 66 %token T_MAINMENU 67 %token T_MENU 68 %token T_MENUCONFIG 69 %token T_MODULES 70 %token T_ON 71 %token T_OPEN_PAREN 72 %token T_OPTIONAL 73 %token T_PLUS_EQUAL 74 %token T_PROMPT 75 %token T_RANGE 76 %token T_SELECT 77 %token T_SOURCE 78 %token T_STRING 79 %token T_TRISTATE 80 %token T_VISIBLE 81 %token T_EOL 82 %token <string> T_ASSIGN_VAL 83 84 %left T_OR 85 %left T_AND 86 %left T_EQUAL T_UNEQUAL 87 %left T_LESS T_LESS_EQUAL T_GREATER T_GREATER_EQUAL 88 %nonassoc T_NOT 89 90 %type <symbol> nonconst_symbol 91 %type <symbol> symbol 92 %type <type> type logic_type default 93 %type <expr> expr 94 %type <expr> if_expr 95 %type <string> end 96 %type <menu> if_entry menu_entry choice_entry 97 %type <string> assign_val 98 %type <flavor> assign_op 99 100 %destructor { 101 fprintf(stderr, "%s:%d: missing end statement for this entry\n", 102 $$->filename, $$->lineno); 103 if (current_menu == $$) 104 menu_end_menu(); 105 } if_entry menu_entry choice_entry 106 107 %% 108 input: mainmenu_stmt stmt_list | stmt_list; 109 110 /* mainmenu entry */ 111 112 mainmenu_stmt: T_MAINMENU T_WORD_QUOTE T_EOL 113 { 114 menu_add_prompt(P_MENU, $2, NULL); 115 }; 116 117 stmt_list: 118 /* empty */ 119 | stmt_list assignment_stmt 120 | stmt_list choice_stmt 121 | stmt_list comment_stmt 122 | stmt_list config_stmt 123 | stmt_list if_stmt 124 | stmt_list menu_stmt 125 | stmt_list menuconfig_stmt 126 | stmt_list source_stmt 127 | stmt_list T_WORD error T_EOL { zconf_error("unknown statement \"%s\"", $2); } 128 | stmt_list error T_EOL { zconf_error("invalid statement"); } 129 ; 130 131 stmt_list_in_choice: 132 /* empty */ 133 | stmt_list_in_choice comment_stmt 134 | stmt_list_in_choice config_stmt 135 | stmt_list_in_choice if_stmt_in_choice 136 | stmt_list_in_choice error T_EOL { zconf_error("invalid statement"); } 137 ; 138 139 /* config/menuconfig entry */ 140 141 config_entry_start: T_CONFIG nonconst_symbol T_EOL 142 { 143 $2->flags |= SYMBOL_OPTIONAL; 144 menu_add_entry($2); 145 printd(DEBUG_PARSE, "%s:%d:config %s\n", cur_filename, cur_lineno, $2->name); 146 }; 147 148 config_stmt: config_entry_start config_option_list 149 { 150 printd(DEBUG_PARSE, "%s:%d:endconfig\n", cur_filename, cur_lineno); 151 }; 152 153 menuconfig_entry_start: T_MENUCONFIG nonconst_symbol T_EOL 154 { 155 $2->flags |= SYMBOL_OPTIONAL; 156 menu_add_entry($2); 157 printd(DEBUG_PARSE, "%s:%d:menuconfig %s\n", cur_filename, cur_lineno, $2->name); 158 }; 159 160 menuconfig_stmt: menuconfig_entry_start config_option_list 161 { 162 if (current_entry->prompt) 163 current_entry->prompt->type = P_MENU; 164 else 165 zconfprint("warning: menuconfig statement without prompt"); 166 printd(DEBUG_PARSE, "%s:%d:endconfig\n", cur_filename, cur_lineno); 167 }; 168 169 config_option_list: 170 /* empty */ 171 | config_option_list config_option 172 | config_option_list depends 173 | config_option_list help 174 ; 175 176 config_option: type prompt_stmt_opt T_EOL 177 { 178 menu_set_type($1); 179 printd(DEBUG_PARSE, "%s:%d:type(%u)\n", cur_filename, cur_lineno, $1); 180 }; 181 182 config_option: T_PROMPT T_WORD_QUOTE if_expr T_EOL 183 { 184 menu_add_prompt(P_PROMPT, $2, $3); 185 printd(DEBUG_PARSE, "%s:%d:prompt\n", cur_filename, cur_lineno); 186 }; 187 188 config_option: default expr if_expr T_EOL 189 { 190 menu_add_expr(P_DEFAULT, $2, $3); 191 if ($1 != S_UNKNOWN) 192 menu_set_type($1); 193 printd(DEBUG_PARSE, "%s:%d:default(%u)\n", cur_filename, cur_lineno, 194 $1); 195 }; 196 197 config_option: T_SELECT nonconst_symbol if_expr T_EOL 198 { 199 menu_add_symbol(P_SELECT, $2, $3); 200 printd(DEBUG_PARSE, "%s:%d:select\n", cur_filename, cur_lineno); 201 }; 202 203 config_option: T_IMPLY nonconst_symbol if_expr T_EOL 204 { 205 menu_add_symbol(P_IMPLY, $2, $3); 206 printd(DEBUG_PARSE, "%s:%d:imply\n", cur_filename, cur_lineno); 207 }; 208 209 config_option: T_RANGE symbol symbol if_expr T_EOL 210 { 211 menu_add_expr(P_RANGE, expr_alloc_comp(E_RANGE,$2, $3), $4); 212 printd(DEBUG_PARSE, "%s:%d:range\n", cur_filename, cur_lineno); 213 }; 214 215 config_option: T_MODULES T_EOL 216 { 217 if (modules_sym) 218 zconf_error("symbol '%s' redefines option 'modules' already defined by symbol '%s'", 219 current_entry->sym->name, modules_sym->name); 220 modules_sym = current_entry->sym; 221 }; 222 223 /* choice entry */ 224 225 choice: T_CHOICE T_EOL 226 { 227 struct symbol *sym = sym_lookup(NULL, SYMBOL_CHOICE); 228 sym->flags |= SYMBOL_NO_WRITE; 229 menu_add_entry(sym); 230 menu_add_expr(P_CHOICE, NULL, NULL); 231 printd(DEBUG_PARSE, "%s:%d:choice\n", cur_filename, cur_lineno); 232 }; 233 234 choice_entry: choice choice_option_list 235 { 236 $$ = menu_add_menu(); 237 }; 238 239 choice_end: end 240 { 241 if (zconf_endtoken($1, "choice")) { 242 menu_end_menu(); 243 printd(DEBUG_PARSE, "%s:%d:endchoice\n", cur_filename, cur_lineno); 244 } 245 }; 246 247 choice_stmt: choice_entry stmt_list_in_choice choice_end 248 ; 249 250 choice_option_list: 251 /* empty */ 252 | choice_option_list choice_option 253 | choice_option_list depends 254 | choice_option_list help 255 ; 256 257 choice_option: T_PROMPT T_WORD_QUOTE if_expr T_EOL 258 { 259 menu_add_prompt(P_PROMPT, $2, $3); 260 printd(DEBUG_PARSE, "%s:%d:prompt\n", cur_filename, cur_lineno); 261 }; 262 263 choice_option: logic_type prompt_stmt_opt T_EOL 264 { 265 menu_set_type($1); 266 printd(DEBUG_PARSE, "%s:%d:type(%u)\n", cur_filename, cur_lineno, $1); 267 }; 268 269 choice_option: T_OPTIONAL T_EOL 270 { 271 current_entry->sym->flags |= SYMBOL_OPTIONAL; 272 printd(DEBUG_PARSE, "%s:%d:optional\n", cur_filename, cur_lineno); 273 }; 274 275 choice_option: T_DEFAULT nonconst_symbol if_expr T_EOL 276 { 277 menu_add_symbol(P_DEFAULT, $2, $3); 278 printd(DEBUG_PARSE, "%s:%d:default\n", cur_filename, cur_lineno); 279 }; 280 281 type: 282 logic_type 283 | T_INT { $$ = S_INT; } 284 | T_HEX { $$ = S_HEX; } 285 | T_STRING { $$ = S_STRING; } 286 287 logic_type: 288 T_BOOL { $$ = S_BOOLEAN; } 289 | T_TRISTATE { $$ = S_TRISTATE; } 290 291 default: 292 T_DEFAULT { $$ = S_UNKNOWN; } 293 | T_DEF_BOOL { $$ = S_BOOLEAN; } 294 | T_DEF_TRISTATE { $$ = S_TRISTATE; } 295 296 /* if entry */ 297 298 if_entry: T_IF expr T_EOL 299 { 300 printd(DEBUG_PARSE, "%s:%d:if\n", cur_filename, cur_lineno); 301 menu_add_entry(NULL); 302 menu_add_dep($2); 303 $$ = menu_add_menu(); 304 }; 305 306 if_end: end 307 { 308 if (zconf_endtoken($1, "if")) { 309 menu_end_menu(); 310 printd(DEBUG_PARSE, "%s:%d:endif\n", cur_filename, cur_lineno); 311 } 312 }; 313 314 if_stmt: if_entry stmt_list if_end 315 ; 316 317 if_stmt_in_choice: if_entry stmt_list_in_choice if_end 318 ; 319 320 /* menu entry */ 321 322 menu: T_MENU T_WORD_QUOTE T_EOL 323 { 324 menu_add_entry(NULL); 325 menu_add_prompt(P_MENU, $2, NULL); 326 printd(DEBUG_PARSE, "%s:%d:menu\n", cur_filename, cur_lineno); 327 }; 328 329 menu_entry: menu menu_option_list 330 { 331 $$ = menu_add_menu(); 332 }; 333 334 menu_end: end 335 { 336 if (zconf_endtoken($1, "menu")) { 337 menu_end_menu(); 338 printd(DEBUG_PARSE, "%s:%d:endmenu\n", cur_filename, cur_lineno); 339 } 340 }; 341 342 menu_stmt: menu_entry stmt_list menu_end 343 ; 344 345 menu_option_list: 346 /* empty */ 347 | menu_option_list visible 348 | menu_option_list depends 349 ; 350 351 source_stmt: T_SOURCE T_WORD_QUOTE T_EOL 352 { 353 printd(DEBUG_PARSE, "%s:%d:source %s\n", cur_filename, cur_lineno, $2); 354 zconf_nextfile($2); 355 free($2); 356 }; 357 358 /* comment entry */ 359 360 comment: T_COMMENT T_WORD_QUOTE T_EOL 361 { 362 menu_add_entry(NULL); 363 menu_add_prompt(P_COMMENT, $2, NULL); 364 printd(DEBUG_PARSE, "%s:%d:comment\n", cur_filename, cur_lineno); 365 }; 366 367 comment_stmt: comment comment_option_list 368 ; 369 370 comment_option_list: 371 /* empty */ 372 | comment_option_list depends 373 ; 374 375 /* help option */ 376 377 help_start: T_HELP T_EOL 378 { 379 printd(DEBUG_PARSE, "%s:%d:help\n", cur_filename, cur_lineno); 380 zconf_starthelp(); 381 }; 382 383 help: help_start T_HELPTEXT 384 { 385 if (current_entry->help) { 386 free(current_entry->help); 387 zconfprint("warning: '%s' defined with more than one help text -- only the last one will be used", 388 current_entry->sym->name ?: "<choice>"); 389 } 390 391 /* Is the help text empty or all whitespace? */ 392 if ($2[strspn($2, " \f\n\r\t\v")] == '\0') 393 zconfprint("warning: '%s' defined with blank help text", 394 current_entry->sym->name ?: "<choice>"); 395 396 current_entry->help = $2; 397 }; 398 399 /* depends option */ 400 401 depends: T_DEPENDS T_ON expr T_EOL 402 { 403 menu_add_dep($3); 404 printd(DEBUG_PARSE, "%s:%d:depends on\n", cur_filename, cur_lineno); 405 }; 406 407 /* visibility option */ 408 visible: T_VISIBLE if_expr T_EOL 409 { 410 menu_add_visibility($2); 411 }; 412 413 /* prompt statement */ 414 415 prompt_stmt_opt: 416 /* empty */ 417 | T_WORD_QUOTE if_expr 418 { 419 menu_add_prompt(P_PROMPT, $1, $2); 420 }; 421 422 end: T_ENDMENU T_EOL { $$ = "menu"; } 423 | T_ENDCHOICE T_EOL { $$ = "choice"; } 424 | T_ENDIF T_EOL { $$ = "if"; } 425 ; 426 427 if_expr: /* empty */ { $$ = NULL; } 428 | T_IF expr { $$ = $2; } 429 ; 430 431 expr: symbol { $$ = expr_alloc_symbol($1); } 432 | symbol T_LESS symbol { $$ = expr_alloc_comp(E_LTH, $1, $3); } 433 | symbol T_LESS_EQUAL symbol { $$ = expr_alloc_comp(E_LEQ, $1, $3); } 434 | symbol T_GREATER symbol { $$ = expr_alloc_comp(E_GTH, $1, $3); } 435 | symbol T_GREATER_EQUAL symbol { $$ = expr_alloc_comp(E_GEQ, $1, $3); } 436 | symbol T_EQUAL symbol { $$ = expr_alloc_comp(E_EQUAL, $1, $3); } 437 | symbol T_UNEQUAL symbol { $$ = expr_alloc_comp(E_UNEQUAL, $1, $3); } 438 | T_OPEN_PAREN expr T_CLOSE_PAREN { $$ = $2; } 439 | T_NOT expr { $$ = expr_alloc_one(E_NOT, $2); } 440 | expr T_OR expr { $$ = expr_alloc_two(E_OR, $1, $3); } 441 | expr T_AND expr { $$ = expr_alloc_two(E_AND, $1, $3); } 442 ; 443 444 /* For symbol definitions, selects, etc., where quotes are not accepted */ 445 nonconst_symbol: T_WORD { $$ = sym_lookup($1, 0); free($1); }; 446 447 symbol: nonconst_symbol 448 | T_WORD_QUOTE { $$ = sym_lookup($1, SYMBOL_CONST); free($1); } 449 ; 450 451 /* assignment statement */ 452 453 assignment_stmt: T_WORD assign_op assign_val T_EOL { variable_add($1, $3, $2); free($1); free($3); } 454 455 assign_op: 456 T_EQUAL { $$ = VAR_RECURSIVE; } 457 | T_COLON_EQUAL { $$ = VAR_SIMPLE; } 458 | T_PLUS_EQUAL { $$ = VAR_APPEND; } 459 ; 460 461 assign_val: 462 /* empty */ { $$ = xstrdup(""); }; 463 | T_ASSIGN_VAL 464 ; 465 466 %% 467 468 void conf_parse(const char *name) 469 { 470 struct menu *menu; 471 472 autoconf_cmd = str_new(); 473 474 str_printf(&autoconf_cmd, "\ndeps_config := \\\n"); 475 476 zconf_initscan(name); 477 478 _menu_init(); 479 480 if (getenv("ZCONF_DEBUG")) 481 yydebug = 1; 482 yyparse(); 483 484 /* 485 * FIXME: 486 * cur_filename and cur_lineno are used even after yyparse(); 487 * menu_finalize() calls menu_add_symbol(). This should be fixed. 488 */ 489 cur_filename = "<none>"; 490 cur_lineno = 0; 491 492 str_printf(&autoconf_cmd, 493 "\n" 494 "$(autoconfig): $(deps_config)\n" 495 "$(deps_config): ;\n"); 496 497 env_write_dep(&autoconf_cmd); 498 499 /* Variables are expanded in the parse phase. We can free them here. */ 500 variable_all_del(); 501 502 if (yynerrs) 503 exit(1); 504 if (!modules_sym) 505 modules_sym = &symbol_no; 506 507 if (!menu_has_prompt(&rootmenu)) { 508 current_entry = &rootmenu; 509 menu_add_prompt(P_MENU, "Main menu", NULL); 510 } 511 512 menu_finalize(&rootmenu); 513 514 menu = &rootmenu; 515 while (menu) { 516 if (menu->sym && sym_check_deps(menu->sym)) 517 yynerrs++; 518 519 if (menu->list) { 520 menu = menu->list; 521 continue; 522 } 523 524 while (!menu->next && menu->parent) 525 menu = menu->parent; 526 527 menu = menu->next; 528 } 529 530 if (yynerrs) 531 exit(1); 532 conf_set_changed(true); 533 } 534 535 static bool zconf_endtoken(const char *tokenname, 536 const char *expected_tokenname) 537 { 538 if (strcmp(tokenname, expected_tokenname)) { 539 zconf_error("unexpected '%s' within %s block", 540 tokenname, expected_tokenname); 541 yynerrs++; 542 return false; 543 } 544 if (strcmp(current_menu->filename, cur_filename)) { 545 zconf_error("'%s' in different file than '%s'", 546 tokenname, expected_tokenname); 547 fprintf(stderr, "%s:%d: location of the '%s'\n", 548 current_menu->filename, current_menu->lineno, 549 expected_tokenname); 550 yynerrs++; 551 return false; 552 } 553 return true; 554 } 555 556 static void zconfprint(const char *err, ...) 557 { 558 va_list ap; 559 560 fprintf(stderr, "%s:%d: ", cur_filename, cur_lineno); 561 va_start(ap, err); 562 vfprintf(stderr, err, ap); 563 va_end(ap); 564 fprintf(stderr, "\n"); 565 } 566 567 static void zconf_error(const char *err, ...) 568 { 569 va_list ap; 570 571 yynerrs++; 572 fprintf(stderr, "%s:%d: ", cur_filename, cur_lineno); 573 va_start(ap, err); 574 vfprintf(stderr, err, ap); 575 va_end(ap); 576 fprintf(stderr, "\n"); 577 } 578 579 static void yyerror(const char *err) 580 { 581 fprintf(stderr, "%s:%d: %s\n", cur_filename, cur_lineno, err); 582 } 583 584 static void print_quoted_string(FILE *out, const char *str) 585 { 586 const char *p; 587 int len; 588 589 putc('"', out); 590 while ((p = strchr(str, '"'))) { 591 len = p - str; 592 if (len) 593 fprintf(out, "%.*s", len, str); 594 fputs("\\\"", out); 595 str = p + 1; 596 } 597 fputs(str, out); 598 putc('"', out); 599 } 600 601 static void print_symbol(FILE *out, struct menu *menu) 602 { 603 struct symbol *sym = menu->sym; 604 struct property *prop; 605 606 if (sym_is_choice(sym)) 607 fprintf(out, "\nchoice\n"); 608 else 609 fprintf(out, "\nconfig %s\n", sym->name); 610 switch (sym->type) { 611 case S_BOOLEAN: 612 fputs(" bool\n", out); 613 break; 614 case S_TRISTATE: 615 fputs(" tristate\n", out); 616 break; 617 case S_STRING: 618 fputs(" string\n", out); 619 break; 620 case S_INT: 621 fputs(" integer\n", out); 622 break; 623 case S_HEX: 624 fputs(" hex\n", out); 625 break; 626 default: 627 fputs(" ???\n", out); 628 break; 629 } 630 for (prop = sym->prop; prop; prop = prop->next) { 631 if (prop->menu != menu) 632 continue; 633 switch (prop->type) { 634 case P_PROMPT: 635 fputs(" prompt ", out); 636 print_quoted_string(out, prop->text); 637 if (!expr_is_yes(prop->visible.expr)) { 638 fputs(" if ", out); 639 expr_fprint(prop->visible.expr, out); 640 } 641 fputc('\n', out); 642 break; 643 case P_DEFAULT: 644 fputs( " default ", out); 645 expr_fprint(prop->expr, out); 646 if (!expr_is_yes(prop->visible.expr)) { 647 fputs(" if ", out); 648 expr_fprint(prop->visible.expr, out); 649 } 650 fputc('\n', out); 651 break; 652 case P_CHOICE: 653 fputs(" #choice value\n", out); 654 break; 655 case P_SELECT: 656 fputs( " select ", out); 657 expr_fprint(prop->expr, out); 658 fputc('\n', out); 659 break; 660 case P_IMPLY: 661 fputs( " imply ", out); 662 expr_fprint(prop->expr, out); 663 fputc('\n', out); 664 break; 665 case P_RANGE: 666 fputs( " range ", out); 667 expr_fprint(prop->expr, out); 668 fputc('\n', out); 669 break; 670 case P_MENU: 671 fputs( " menu ", out); 672 print_quoted_string(out, prop->text); 673 fputc('\n', out); 674 break; 675 case P_SYMBOL: 676 fputs( " symbol ", out); 677 fprintf(out, "%s\n", prop->menu->sym->name); 678 break; 679 default: 680 fprintf(out, " unknown prop %d!\n", prop->type); 681 break; 682 } 683 } 684 if (menu->help) { 685 int len = strlen(menu->help); 686 while (menu->help[--len] == '\n') 687 menu->help[len] = 0; 688 fprintf(out, " help\n%s\n", menu->help); 689 } 690 } 691 692 void zconfdump(FILE *out) 693 { 694 struct property *prop; 695 struct symbol *sym; 696 struct menu *menu; 697 698 menu = rootmenu.list; 699 while (menu) { 700 if ((sym = menu->sym)) 701 print_symbol(out, menu); 702 else if ((prop = menu->prompt)) { 703 switch (prop->type) { 704 case P_COMMENT: 705 fputs("\ncomment ", out); 706 print_quoted_string(out, prop->text); 707 fputs("\n", out); 708 break; 709 case P_MENU: 710 fputs("\nmenu ", out); 711 print_quoted_string(out, prop->text); 712 fputs("\n", out); 713 break; 714 default: 715 ; 716 } 717 if (!expr_is_yes(prop->visible.expr)) { 718 fputs(" depends ", out); 719 expr_fprint(prop->visible.expr, out); 720 fputc('\n', out); 721 } 722 } 723 724 if (menu->list) 725 menu = menu->list; 726 else if (menu->next) 727 menu = menu->next; 728 else while ((menu = menu->parent)) { 729 if (menu->prompt && menu->prompt->type == P_MENU) 730 fputs("\nendmenu\n", out); 731 if (menu->next) { 732 menu = menu->next; 733 break; 734 } 735 } 736 } 737 } 738