1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org> 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 if (!current_entry->prompt) { 237 fprintf(stderr, "%s:%d: error: choice must have a prompt\n", 238 current_entry->filename, current_entry->lineno); 239 yynerrs++; 240 } 241 242 $$ = menu_add_menu(); 243 }; 244 245 choice_end: end 246 { 247 if (zconf_endtoken($1, "choice")) { 248 menu_end_menu(); 249 printd(DEBUG_PARSE, "%s:%d:endchoice\n", cur_filename, cur_lineno); 250 } 251 }; 252 253 choice_stmt: choice_entry stmt_list_in_choice choice_end 254 ; 255 256 choice_option_list: 257 /* empty */ 258 | choice_option_list choice_option 259 | choice_option_list depends 260 | choice_option_list help 261 ; 262 263 choice_option: T_PROMPT T_WORD_QUOTE if_expr T_EOL 264 { 265 menu_add_prompt(P_PROMPT, $2, $3); 266 printd(DEBUG_PARSE, "%s:%d:prompt\n", cur_filename, cur_lineno); 267 }; 268 269 choice_option: logic_type prompt_stmt_opt T_EOL 270 { 271 menu_set_type($1); 272 printd(DEBUG_PARSE, "%s:%d:type(%u)\n", cur_filename, cur_lineno, $1); 273 }; 274 275 choice_option: T_OPTIONAL T_EOL 276 { 277 current_entry->sym->flags |= SYMBOL_OPTIONAL; 278 printd(DEBUG_PARSE, "%s:%d:optional\n", cur_filename, cur_lineno); 279 }; 280 281 choice_option: T_DEFAULT nonconst_symbol if_expr T_EOL 282 { 283 menu_add_symbol(P_DEFAULT, $2, $3); 284 printd(DEBUG_PARSE, "%s:%d:default\n", cur_filename, cur_lineno); 285 }; 286 287 type: 288 logic_type 289 | T_INT { $$ = S_INT; } 290 | T_HEX { $$ = S_HEX; } 291 | T_STRING { $$ = S_STRING; } 292 293 logic_type: 294 T_BOOL { $$ = S_BOOLEAN; } 295 | T_TRISTATE { $$ = S_TRISTATE; } 296 297 default: 298 T_DEFAULT { $$ = S_UNKNOWN; } 299 | T_DEF_BOOL { $$ = S_BOOLEAN; } 300 | T_DEF_TRISTATE { $$ = S_TRISTATE; } 301 302 /* if entry */ 303 304 if_entry: T_IF expr T_EOL 305 { 306 printd(DEBUG_PARSE, "%s:%d:if\n", cur_filename, cur_lineno); 307 menu_add_entry(NULL); 308 menu_add_dep($2); 309 $$ = menu_add_menu(); 310 }; 311 312 if_end: end 313 { 314 if (zconf_endtoken($1, "if")) { 315 menu_end_menu(); 316 printd(DEBUG_PARSE, "%s:%d:endif\n", cur_filename, cur_lineno); 317 } 318 }; 319 320 if_stmt: if_entry stmt_list if_end 321 ; 322 323 if_stmt_in_choice: if_entry stmt_list_in_choice if_end 324 ; 325 326 /* menu entry */ 327 328 menu: T_MENU T_WORD_QUOTE T_EOL 329 { 330 menu_add_entry(NULL); 331 menu_add_prompt(P_MENU, $2, NULL); 332 printd(DEBUG_PARSE, "%s:%d:menu\n", cur_filename, cur_lineno); 333 }; 334 335 menu_entry: menu menu_option_list 336 { 337 $$ = menu_add_menu(); 338 }; 339 340 menu_end: end 341 { 342 if (zconf_endtoken($1, "menu")) { 343 menu_end_menu(); 344 printd(DEBUG_PARSE, "%s:%d:endmenu\n", cur_filename, cur_lineno); 345 } 346 }; 347 348 menu_stmt: menu_entry stmt_list menu_end 349 ; 350 351 menu_option_list: 352 /* empty */ 353 | menu_option_list visible 354 | menu_option_list depends 355 ; 356 357 source_stmt: T_SOURCE T_WORD_QUOTE T_EOL 358 { 359 printd(DEBUG_PARSE, "%s:%d:source %s\n", cur_filename, cur_lineno, $2); 360 zconf_nextfile($2); 361 free($2); 362 }; 363 364 /* comment entry */ 365 366 comment: T_COMMENT T_WORD_QUOTE T_EOL 367 { 368 menu_add_entry(NULL); 369 menu_add_prompt(P_COMMENT, $2, NULL); 370 printd(DEBUG_PARSE, "%s:%d:comment\n", cur_filename, cur_lineno); 371 }; 372 373 comment_stmt: comment comment_option_list 374 ; 375 376 comment_option_list: 377 /* empty */ 378 | comment_option_list depends 379 ; 380 381 /* help option */ 382 383 help_start: T_HELP T_EOL 384 { 385 printd(DEBUG_PARSE, "%s:%d:help\n", cur_filename, cur_lineno); 386 zconf_starthelp(); 387 }; 388 389 help: help_start T_HELPTEXT 390 { 391 if (current_entry->help) { 392 free(current_entry->help); 393 zconfprint("warning: '%s' defined with more than one help text -- only the last one will be used", 394 current_entry->sym->name ?: "<choice>"); 395 } 396 397 /* Is the help text empty or all whitespace? */ 398 if ($2[strspn($2, " \f\n\r\t\v")] == '\0') 399 zconfprint("warning: '%s' defined with blank help text", 400 current_entry->sym->name ?: "<choice>"); 401 402 current_entry->help = $2; 403 }; 404 405 /* depends option */ 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", cur_filename, cur_lineno); 411 }; 412 413 /* visibility option */ 414 visible: T_VISIBLE if_expr T_EOL 415 { 416 menu_add_visibility($2); 417 }; 418 419 /* prompt statement */ 420 421 prompt_stmt_opt: 422 /* empty */ 423 | T_WORD_QUOTE if_expr 424 { 425 menu_add_prompt(P_PROMPT, $1, $2); 426 }; 427 428 end: T_ENDMENU T_EOL { $$ = "menu"; } 429 | T_ENDCHOICE T_EOL { $$ = "choice"; } 430 | T_ENDIF T_EOL { $$ = "if"; } 431 ; 432 433 if_expr: /* empty */ { $$ = NULL; } 434 | T_IF expr { $$ = $2; } 435 ; 436 437 expr: symbol { $$ = expr_alloc_symbol($1); } 438 | symbol T_LESS symbol { $$ = expr_alloc_comp(E_LTH, $1, $3); } 439 | symbol T_LESS_EQUAL symbol { $$ = expr_alloc_comp(E_LEQ, $1, $3); } 440 | symbol T_GREATER symbol { $$ = expr_alloc_comp(E_GTH, $1, $3); } 441 | symbol T_GREATER_EQUAL symbol { $$ = expr_alloc_comp(E_GEQ, $1, $3); } 442 | symbol T_EQUAL symbol { $$ = expr_alloc_comp(E_EQUAL, $1, $3); } 443 | symbol T_UNEQUAL symbol { $$ = expr_alloc_comp(E_UNEQUAL, $1, $3); } 444 | T_OPEN_PAREN expr T_CLOSE_PAREN { $$ = $2; } 445 | T_NOT expr { $$ = expr_alloc_one(E_NOT, $2); } 446 | expr T_OR expr { $$ = expr_alloc_two(E_OR, $1, $3); } 447 | expr T_AND expr { $$ = expr_alloc_two(E_AND, $1, $3); } 448 ; 449 450 /* For symbol definitions, selects, etc., where quotes are not accepted */ 451 nonconst_symbol: T_WORD { $$ = sym_lookup($1, 0); free($1); }; 452 453 symbol: nonconst_symbol 454 | T_WORD_QUOTE { $$ = sym_lookup($1, SYMBOL_CONST); free($1); } 455 ; 456 457 /* assignment statement */ 458 459 assignment_stmt: T_WORD assign_op assign_val T_EOL { variable_add($1, $3, $2); free($1); free($3); } 460 461 assign_op: 462 T_EQUAL { $$ = VAR_RECURSIVE; } 463 | T_COLON_EQUAL { $$ = VAR_SIMPLE; } 464 | T_PLUS_EQUAL { $$ = VAR_APPEND; } 465 ; 466 467 assign_val: 468 /* empty */ { $$ = xstrdup(""); }; 469 | T_ASSIGN_VAL 470 ; 471 472 %% 473 474 void conf_parse(const char *name) 475 { 476 struct menu *menu; 477 478 autoconf_cmd = str_new(); 479 480 str_printf(&autoconf_cmd, "\ndeps_config := \\\n"); 481 482 zconf_initscan(name); 483 484 _menu_init(); 485 486 if (getenv("ZCONF_DEBUG")) 487 yydebug = 1; 488 yyparse(); 489 490 /* 491 * FIXME: 492 * cur_filename and cur_lineno are used even after yyparse(); 493 * menu_finalize() calls menu_add_symbol(). This should be fixed. 494 */ 495 cur_filename = "<none>"; 496 cur_lineno = 0; 497 498 str_printf(&autoconf_cmd, 499 "\n" 500 "$(autoconfig): $(deps_config)\n" 501 "$(deps_config): ;\n"); 502 503 env_write_dep(&autoconf_cmd); 504 505 /* Variables are expanded in the parse phase. We can free them here. */ 506 variable_all_del(); 507 508 if (yynerrs) 509 exit(1); 510 if (!modules_sym) 511 modules_sym = &symbol_no; 512 513 if (!menu_has_prompt(&rootmenu)) { 514 current_entry = &rootmenu; 515 menu_add_prompt(P_MENU, "Main menu", NULL); 516 } 517 518 menu_finalize(&rootmenu); 519 520 menu = &rootmenu; 521 while (menu) { 522 if (menu->sym && sym_check_deps(menu->sym)) 523 yynerrs++; 524 525 if (menu->list) { 526 menu = menu->list; 527 continue; 528 } 529 530 while (!menu->next && menu->parent) 531 menu = menu->parent; 532 533 menu = menu->next; 534 } 535 536 if (yynerrs) 537 exit(1); 538 conf_set_changed(true); 539 } 540 541 static bool zconf_endtoken(const char *tokenname, 542 const char *expected_tokenname) 543 { 544 if (strcmp(tokenname, expected_tokenname)) { 545 zconf_error("unexpected '%s' within %s block", 546 tokenname, expected_tokenname); 547 yynerrs++; 548 return false; 549 } 550 if (strcmp(current_menu->filename, cur_filename)) { 551 zconf_error("'%s' in different file than '%s'", 552 tokenname, expected_tokenname); 553 fprintf(stderr, "%s:%d: location of the '%s'\n", 554 current_menu->filename, current_menu->lineno, 555 expected_tokenname); 556 yynerrs++; 557 return false; 558 } 559 return true; 560 } 561 562 static void zconfprint(const char *err, ...) 563 { 564 va_list ap; 565 566 fprintf(stderr, "%s:%d: ", cur_filename, cur_lineno); 567 va_start(ap, err); 568 vfprintf(stderr, err, ap); 569 va_end(ap); 570 fprintf(stderr, "\n"); 571 } 572 573 static void zconf_error(const char *err, ...) 574 { 575 va_list ap; 576 577 yynerrs++; 578 fprintf(stderr, "%s:%d: ", cur_filename, cur_lineno); 579 va_start(ap, err); 580 vfprintf(stderr, err, ap); 581 va_end(ap); 582 fprintf(stderr, "\n"); 583 } 584 585 static void yyerror(const char *err) 586 { 587 fprintf(stderr, "%s:%d: %s\n", cur_filename, cur_lineno, err); 588 } 589 590 static void print_quoted_string(FILE *out, const char *str) 591 { 592 const char *p; 593 int len; 594 595 putc('"', out); 596 while ((p = strchr(str, '"'))) { 597 len = p - str; 598 if (len) 599 fprintf(out, "%.*s", len, str); 600 fputs("\\\"", out); 601 str = p + 1; 602 } 603 fputs(str, out); 604 putc('"', out); 605 } 606 607 static void print_symbol(FILE *out, struct menu *menu) 608 { 609 struct symbol *sym = menu->sym; 610 struct property *prop; 611 612 if (sym_is_choice(sym)) 613 fprintf(out, "\nchoice\n"); 614 else 615 fprintf(out, "\nconfig %s\n", sym->name); 616 switch (sym->type) { 617 case S_BOOLEAN: 618 fputs(" bool\n", out); 619 break; 620 case S_TRISTATE: 621 fputs(" tristate\n", out); 622 break; 623 case S_STRING: 624 fputs(" string\n", out); 625 break; 626 case S_INT: 627 fputs(" integer\n", out); 628 break; 629 case S_HEX: 630 fputs(" hex\n", out); 631 break; 632 default: 633 fputs(" ???\n", out); 634 break; 635 } 636 for (prop = sym->prop; prop; prop = prop->next) { 637 if (prop->menu != menu) 638 continue; 639 switch (prop->type) { 640 case P_PROMPT: 641 fputs(" prompt ", out); 642 print_quoted_string(out, prop->text); 643 if (!expr_is_yes(prop->visible.expr)) { 644 fputs(" if ", out); 645 expr_fprint(prop->visible.expr, out); 646 } 647 fputc('\n', out); 648 break; 649 case P_DEFAULT: 650 fputs( " default ", out); 651 expr_fprint(prop->expr, out); 652 if (!expr_is_yes(prop->visible.expr)) { 653 fputs(" if ", out); 654 expr_fprint(prop->visible.expr, out); 655 } 656 fputc('\n', out); 657 break; 658 case P_CHOICE: 659 fputs(" #choice value\n", out); 660 break; 661 case P_SELECT: 662 fputs( " select ", out); 663 expr_fprint(prop->expr, out); 664 fputc('\n', out); 665 break; 666 case P_IMPLY: 667 fputs( " imply ", out); 668 expr_fprint(prop->expr, out); 669 fputc('\n', out); 670 break; 671 case P_RANGE: 672 fputs( " range ", out); 673 expr_fprint(prop->expr, out); 674 fputc('\n', out); 675 break; 676 case P_MENU: 677 fputs( " menu ", out); 678 print_quoted_string(out, prop->text); 679 fputc('\n', out); 680 break; 681 case P_SYMBOL: 682 fputs( " symbol ", out); 683 fprintf(out, "%s\n", prop->menu->sym->name); 684 break; 685 default: 686 fprintf(out, " unknown prop %d!\n", prop->type); 687 break; 688 } 689 } 690 if (menu->help) { 691 int len = strlen(menu->help); 692 while (menu->help[--len] == '\n') 693 menu->help[len] = 0; 694 fprintf(out, " help\n%s\n", menu->help); 695 } 696 } 697 698 void zconfdump(FILE *out) 699 { 700 struct property *prop; 701 struct symbol *sym; 702 struct menu *menu; 703 704 menu = rootmenu.list; 705 while (menu) { 706 if ((sym = menu->sym)) 707 print_symbol(out, menu); 708 else if ((prop = menu->prompt)) { 709 switch (prop->type) { 710 case P_COMMENT: 711 fputs("\ncomment ", out); 712 print_quoted_string(out, prop->text); 713 fputs("\n", out); 714 break; 715 case P_MENU: 716 fputs("\nmenu ", out); 717 print_quoted_string(out, prop->text); 718 fputs("\n", out); 719 break; 720 default: 721 ; 722 } 723 if (!expr_is_yes(prop->visible.expr)) { 724 fputs(" depends ", out); 725 expr_fprint(prop->visible.expr, out); 726 fputc('\n', out); 727 } 728 } 729 730 if (menu->list) 731 menu = menu->list; 732 else if (menu->next) 733 menu = menu->next; 734 else while ((menu = menu->parent)) { 735 if (menu->prompt && menu->prompt->type == P_MENU) 736 fputs("\nendmenu\n", out); 737 if (menu->next) { 738 menu = menu->next; 739 break; 740 } 741 } 742 } 743 } 744