release/src/router/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 printd(mask, fmt...) if (cdebug & (mask)) printf(fmt)
  15
  16 #define PRINTD          0x0001
  17 #define DEBUG_PARSE     0x0002
  18
  19 int cdebug = PRINTD;
  20
  21 extern int zconflex(void);
  22 static void zconfprint(const char *err, ...);
  23 static void zconferror(const char *err);
  24 static bool zconf_endtoken(int token, int starttoken, int endtoken);
  25
  26 struct symbol *symbol_hash[257];
  27
  28 #define YYERROR_VERBOSE
  29 %}
  30 %expect 36
  31
  32 %union
  33 {
  34         int token;
  35         char *string;
  36         struct symbol *symbol;
  37         struct expr *expr;
  38         struct menu *menu;
  39 }
  40
  41 %token T_MAINMENU
  42 %token T_MENU
  43 %token T_ENDMENU
  44 %token T_SOURCE
  45 %token T_CHOICE
  46 %token T_ENDCHOICE
  47 %token T_COMMENT
  48 %token T_CONFIG
  49 %token T_HELP
  50 %token <string> T_HELPTEXT
  51 %token T_IF
  52 %token T_ENDIF
  53 %token T_DEPENDS
  54 %token T_REQUIRES
  55 %token T_OPTIONAL
  56 %token T_PROMPT
  57 %token T_DEFAULT
  58 %token T_TRISTATE
  59 %token T_BOOLEAN
  60 %token T_INT
  61 %token T_HEX
  62 %token <string> T_WORD
  63 %token <string> T_STRING
  64 %token T_UNEQUAL
  65 %token T_EOF
  66 %token T_EOL
  67 %token T_CLOSE_PAREN
  68 %token T_OPEN_PAREN
  69 %token T_ON
  70
  71 %left T_OR
  72 %left T_AND
  73 %left T_EQUAL T_UNEQUAL
  74 %nonassoc T_NOT
  75
  76 %type <string> prompt
  77 %type <string> source
  78 %type <symbol> symbol
  79 %type <expr> expr
  80 %type <expr> if_expr
  81 %type <token> end
  82
  83 %{
  84 #define LKC_DIRECT_LINK
  85 #include "lkc.h"
  86 %}
  87 %%
  88 input:    /* empty */
  89         | input block
  90 ;
  91
  92 block:    common_block
  93         | choice_stmt
  94         | menu_stmt
  95         | T_MAINMENU prompt nl_or_eof
  96         | T_ENDMENU             { zconfprint("unexpected 'endmenu' statement"); }
  97         | T_ENDIF               { zconfprint("unexpected 'endif' statement"); }
  98         | T_ENDCHOICE           { zconfprint("unexpected 'endchoice' statement"); }
  99         | error nl_or_eof       { zconfprint("syntax error"); yyerrok; }
 100 ;
 101
 102 common_block:
 103           if_stmt
 104         | comment_stmt
 105         | config_stmt
 106         | source_stmt
 107         | nl_or_eof
 108 ;
 109
 110
 111 /* config entry */
 112
 113 config_entry_start: T_CONFIG T_WORD
 114 {
 115         struct symbol *sym = sym_lookup($2, 0);
 116         sym->flags |= SYMBOL_OPTIONAL;
 117         menu_add_entry(sym);
 118         printd(DEBUG_PARSE, "%s:%d:config %s\n", zconf_curname(), zconf_lineno(), $2);
 119 };
 120
 121 config_stmt: config_entry_start T_EOL config_option_list
 122 {
 123         menu_end_entry();
 124         printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
 125 };
 126
 127 config_option_list:
 128           /* empty */
 129         | config_option_list config_option T_EOL
 130         | config_option_list depends T_EOL
 131         | config_option_list help
 132         | config_option_list T_EOL
 133 { };
 134
 135 config_option: T_TRISTATE prompt_stmt_opt
 136 {
 137         menu_set_type(S_TRISTATE);
 138         printd(DEBUG_PARSE, "%s:%d:tristate\n", zconf_curname(), zconf_lineno());
 139 };
 140
 141 config_option: T_BOOLEAN prompt_stmt_opt
 142 {
 143         menu_set_type(S_BOOLEAN);
 144         printd(DEBUG_PARSE, "%s:%d:boolean\n", zconf_curname(), zconf_lineno());
 145 };
 146
 147 config_option: T_INT prompt_stmt_opt
 148 {
 149         menu_set_type(S_INT);
 150         printd(DEBUG_PARSE, "%s:%d:int\n", zconf_curname(), zconf_lineno());
 151 };
 152
 153 config_option: T_HEX prompt_stmt_opt
 154 {
 155         menu_set_type(S_HEX);
 156         printd(DEBUG_PARSE, "%s:%d:hex\n", zconf_curname(), zconf_lineno());
 157 };
 158
 159 config_option: T_STRING prompt_stmt_opt
 160 {
 161         menu_set_type(S_STRING);
 162         printd(DEBUG_PARSE, "%s:%d:string\n", zconf_curname(), zconf_lineno());
 163 };
 164
 165 config_option: T_PROMPT prompt if_expr
 166 {
 167         menu_add_prop(P_PROMPT, $2, NULL, $3);
 168         printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
 169 };
 170
 171 config_option: T_DEFAULT symbol if_expr
 172 {
 173         menu_add_prop(P_DEFAULT, NULL, $2, $3);
 174         printd(DEBUG_PARSE, "%s:%d:default\n", zconf_curname(), zconf_lineno());
 175 };
 176
 177 /* choice entry */
 178
 179 choice: T_CHOICE
 180 {
 181         struct symbol *sym = sym_lookup(NULL, 0);
 182         sym->flags |= SYMBOL_CHOICE;
 183         menu_add_entry(sym);
 184         menu_add_prop(P_CHOICE, NULL, NULL, NULL);
 185         printd(DEBUG_PARSE, "%s:%d:choice\n", zconf_curname(), zconf_lineno());
 186 };
 187
 188 choice_entry: choice T_EOL choice_option_list
 189 {
 190         menu_end_entry();
 191         menu_add_menu();
 192 };
 193
 194 choice_end: end
 195 {
 196         if (zconf_endtoken($1, T_CHOICE, T_ENDCHOICE)) {
 197                 menu_end_menu();
 198                 printd(DEBUG_PARSE, "%s:%d:endchoice\n", zconf_curname(), zconf_lineno());
 199         }
 200 };
 201
 202 choice_stmt:
 203           choice_entry choice_block choice_end T_EOL
 204         | choice_entry choice_block
 205 {
 206         printf("%s:%d: missing 'endchoice' for this 'choice' statement\n", current_menu->file->name, current_menu->lineno);
 207         zconfnerrs++;
 208 };
 209
 210 choice_option_list:
 211           /* empty */
 212         | choice_option_list choice_option T_EOL
 213         | choice_option_list depends T_EOL
 214         | choice_option_list help
 215         | choice_option_list T_EOL
 216 ;
 217
 218 choice_option: T_PROMPT prompt if_expr
 219 {
 220         menu_add_prop(P_PROMPT, $2, NULL, $3);
 221         printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
 222 };
 223
 224 choice_option: T_OPTIONAL
 225 {
 226         current_entry->sym->flags |= SYMBOL_OPTIONAL;
 227         printd(DEBUG_PARSE, "%s:%d:optional\n", zconf_curname(), zconf_lineno());
 228 };
 229
 230 choice_option: T_DEFAULT symbol
 231 {
 232         menu_add_prop(P_DEFAULT, NULL, $2, NULL);
 233         //current_choice->prop->def = $2;
 234         printd(DEBUG_PARSE, "%s:%d:default\n", zconf_curname(), zconf_lineno());
 235 };
 236
 237 choice_block:
 238           /* empty */
 239         | choice_block common_block
 240 ;
 241
 242 /* if entry */
 243
 244 if: T_IF expr
 245 {
 246         printd(DEBUG_PARSE, "%s:%d:if\n", zconf_curname(), zconf_lineno());
 247         menu_add_entry(NULL);
 248         //current_entry->prompt = menu_add_prop(T_IF, NULL, NULL, $2);
 249         menu_add_dep($2);
 250         menu_end_entry();
 251         menu_add_menu();
 252 };
 253
 254 if_end: end
 255 {
 256         if (zconf_endtoken($1, T_IF, T_ENDIF)) {
 257                 menu_end_menu();
 258                 printd(DEBUG_PARSE, "%s:%d:endif\n", zconf_curname(), zconf_lineno());
 259         }
 260 };
 261
 262 if_stmt:
 263           if T_EOL if_block if_end T_EOL
 264         | if T_EOL if_block
 265 {
 266         printf("%s:%d: missing 'endif' for this 'if' statement\n", current_menu->file->name, current_menu->lineno);
 267         zconfnerrs++;
 268 };
 269
 270 if_block:
 271           /* empty */
 272         | if_block common_block
 273         | if_block menu_stmt
 274         | if_block choice_stmt
 275 ;
 276
 277 /* menu entry */
 278
 279 menu: T_MENU prompt
 280 {
 281         menu_add_entry(NULL);
 282         menu_add_prop(P_MENU, $2, NULL, NULL);
 283         printd(DEBUG_PARSE, "%s:%d:menu\n", zconf_curname(), zconf_lineno());
 284 };
 285
 286 menu_entry: menu T_EOL depends_list
 287 {
 288         menu_end_entry();
 289         menu_add_menu();
 290 };
 291
 292 menu_end: end
 293 {
 294         if (zconf_endtoken($1, T_MENU, T_ENDMENU)) {
 295                 menu_end_menu();
 296                 printd(DEBUG_PARSE, "%s:%d:endmenu\n", zconf_curname(), zconf_lineno());
 297         }
 298 };
 299
 300 menu_stmt:
 301           menu_entry menu_block menu_end T_EOL
 302         | menu_entry menu_block
 303 {
 304         printf("%s:%d: missing 'endmenu' for this 'menu' statement\n", current_menu->file->name, current_menu->lineno);
 305         zconfnerrs++;
 306 };
 307
 308 menu_block:
 309           /* empty */
 310         | menu_block common_block
 311         | menu_block menu_stmt
 312         | menu_block choice_stmt
 313         | menu_block error T_EOL                { zconfprint("invalid menu option"); yyerrok; }
 314 ;
 315
 316 source: T_SOURCE prompt
 317 {
 318         $$ = $2;
 319         printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), $2);
 320 };
 321
 322 source_stmt: source T_EOL
 323 {
 324         zconf_nextfile($1);
 325 };
 326
 327 /* comment entry */
 328
 329 comment: T_COMMENT prompt
 330 {
 331         menu_add_entry(NULL);
 332         menu_add_prop(P_COMMENT, $2, NULL, NULL);
 333         printd(DEBUG_PARSE, "%s:%d:comment\n", zconf_curname(), zconf_lineno());
 334 };
 335
 336 comment_stmt: comment T_EOL depends_list
 337 {
 338         menu_end_entry();
 339 };
 340
 341 /* help option */
 342
 343 help_start: T_HELP T_EOL
 344 {
 345         printd(DEBUG_PARSE, "%s:%d:help\n", zconf_curname(), zconf_lineno());
 346         zconf_starthelp();
 347 };
 348
 349 help: help_start T_HELPTEXT
 350 {
 351         current_entry->sym->help = $2;
 352 };
 353
 354 /* depends option */
 355
 356 depends_list:     /* empty */
 357                 | depends_list depends T_EOL
 358                 | depends_list T_EOL
 359 { };
 360
 361 depends: T_DEPENDS T_ON expr
 362 {
 363         menu_add_dep($3);
 364         printd(DEBUG_PARSE, "%s:%d:depends on\n", zconf_curname(), zconf_lineno());
 365 }
 366         | T_DEPENDS expr
 367 {
 368         menu_add_dep($2);
 369         printd(DEBUG_PARSE, "%s:%d:depends\n", zconf_curname(), zconf_lineno());
 370 }
 371         | T_REQUIRES expr
 372 {
 373         menu_add_dep($2);
 374         printd(DEBUG_PARSE, "%s:%d:requires\n", zconf_curname(), zconf_lineno());
 375 };
 376
 377 /* prompt statement */
 378
 379 prompt_stmt_opt:
 380           /* empty */
 381         | prompt
 382 {
 383         menu_add_prop(P_PROMPT, $1, NULL, NULL);
 384 }
 385         | prompt T_IF expr
 386 {
 387         menu_add_prop(P_PROMPT, $1, NULL, $3);
 388 };
 389
 390 prompt:   T_WORD
 391         | T_STRING
 392 ;
 393
 394 end:      T_ENDMENU             { $$ = T_ENDMENU; }
 395         | T_ENDCHOICE           { $$ = T_ENDCHOICE; }
 396         | T_ENDIF               { $$ = T_ENDIF; }
 397 ;
 398
 399 nl_or_eof:
 400         T_EOL | T_EOF;
 401
 402 if_expr:  /* empty */                   { $$ = NULL; }
 403         | T_IF expr                     { $$ = $2; }
 404 ;
 405
 406 expr:     symbol                                { $$ = expr_alloc_symbol($1); }
 407         | symbol T_EQUAL symbol                 { $$ = expr_alloc_comp(E_EQUAL, $1, $3); }
 408         | symbol T_UNEQUAL symbol               { $$ = expr_alloc_comp(E_UNEQUAL, $1, $3); }
 409         | T_OPEN_PAREN expr T_CLOSE_PAREN       { $$ = $2; }
 410         | T_NOT expr                            { $$ = expr_alloc_one(E_NOT, $2); }
 411         | expr T_OR expr                        { $$ = expr_alloc_two(E_OR, $1, $3); }
 412         | expr T_AND expr                       { $$ = expr_alloc_two(E_AND, $1, $3); }
 413 ;
 414
 415 symbol:   T_WORD        { $$ = sym_lookup($1, 0); free($1); }
 416         | T_STRING      { $$ = sym_lookup($1, 1); free($1); }
 417 ;
 418
 419 %%
 420
 421 void conf_parse(const char *name)
 422 {
 423         zconf_initscan(name);
 424
 425         sym_init();
 426         menu_init();
 427         rootmenu.prompt = menu_add_prop(P_MENU, "Broadcom Linux Router Configuration", NULL, NULL);
 428
 429         //zconfdebug = 1;
 430         zconfparse();
 431         if (zconfnerrs)
 432                 exit(1);
 433         menu_finalize(&rootmenu);
 434
 435         modules_sym = sym_lookup("MODULES", 0);
 436
 437         sym_change_count = 1;
 438 }
 439
 440 const char *zconf_tokenname(int token)
 441 {
 442         switch (token) {
 443         case T_MENU:            return "menu";
 444         case T_ENDMENU:         return "endmenu";
 445         case T_CHOICE:          return "choice";
 446         case T_ENDCHOICE:       return "endchoice";
 447         case T_IF:              return "if";
 448         case T_ENDIF:           return "endif";
 449         }
 450         return "<token>";
 451 }
 452
 453 static bool zconf_endtoken(int token, int starttoken, int endtoken)
 454 {
 455         if (token != endtoken) {
 456                 zconfprint("unexpected '%s' within %s block", zconf_tokenname(token), zconf_tokenname(starttoken));
 457                 zconfnerrs++;
 458                 return false;
 459         }
 460         if (current_menu->file != current_file) {
 461                 zconfprint("'%s' in different file than '%s'", zconf_tokenname(token), zconf_tokenname(starttoken));
 462                 zconfprint("location of the '%s'", zconf_tokenname(starttoken));
 463                 zconfnerrs++;
 464                 return false;
 465         }
 466         return true;
 467 }
 468
 469 static void zconfprint(const char *err, ...)
 470 {
 471         va_list ap;
 472
 473         fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
 474         va_start(ap, err);
 475         vfprintf(stderr, err, ap);
 476         va_end(ap);
 477         fprintf(stderr, "\n");
 478 }
 479
 480 static void zconferror(const char *err)
 481 {
 482         fprintf(stderr, "%s:%d: %s\n", zconf_curname(), zconf_lineno(), err);
 483 }
 484
 485 void print_quoted_string(FILE *out, const char *str)
 486 {
 487         const char *p;
 488         int len;
 489
 490         putc('"', out);
 491         while ((p = strchr(str, '"'))) {
 492                 len = p - str;
 493                 if (len)
 494                         fprintf(out, "%.*s", len, str);
 495                 fputs("\\\"", out);
 496                 str = p + 1;
 497         }
 498         fputs(str, out);
 499         putc('"', out);
 500 }
 501
 502 void print_symbol(FILE *out, struct menu *menu)
 503 {
 504         struct symbol *sym = menu->sym;
 505         struct property *prop;
 506
 507         //sym->flags |= SYMBOL_PRINTED;
 508
 509         if (sym_is_choice(sym))
 510                 fprintf(out, "choice\n");
 511         else
 512                 fprintf(out, "config %s\n", sym->name);
 513         switch (sym->type) {
 514         case S_BOOLEAN:
 515                 fputs("  boolean\n", out);
 516                 break;
 517         case S_TRISTATE:
 518                 fputs("  tristate\n", out);
 519                 break;
 520         case S_STRING:
 521                 fputs("  string\n", out);
 522                 break;
 523         case S_INT:
 524                 fputs("  integer\n", out);
 525                 break;
 526         case S_HEX:
 527                 fputs("  hex\n", out);
 528                 break;
 529         default:
 530                 fputs("  ???\n", out);
 531                 break;
 532         }
 533         for (prop = sym->prop; prop; prop = prop->next) {
 534                 if (prop->menu != menu)
 535                         continue;
 536                 switch (prop->type) {
 537                 case P_PROMPT:
 538                         fputs("  prompt ", out);
 539                         print_quoted_string(out, prop->text);
 540                         if (prop->def) {
 541                                 fputc(' ', out);
 542                                 if (prop->def->flags & SYMBOL_CONST)
 543                                         print_quoted_string(out, prop->def->name);
 544                                 else
 545                                         fputs(prop->def->name, out);
 546                         }
 547                         if (!expr_is_yes(E_EXPR(prop->visible))) {
 548                                 fputs(" if ", out);
 549                                 expr_fprint(E_EXPR(prop->visible), out);
 550                         }
 551                         fputc('\n', out);
 552                         break;
 553                 case P_DEFAULT:
 554                         fputs( "  default ", out);
 555                         print_quoted_string(out, prop->def->name);
 556                         if (!expr_is_yes(E_EXPR(prop->visible))) {
 557                                 fputs(" if ", out);
 558                                 expr_fprint(E_EXPR(prop->visible), out);
 559                         }
 560                         fputc('\n', out);
 561                         break;
 562                 case P_CHOICE:
 563                         fputs("  #choice value\n", out);
 564                         break;
 565                 default:
 566                         fprintf(out, "  unknown prop %d!\n", prop->type);
 567                         break;
 568                 }
 569         }
 570         if (sym->help) {
 571                 int len = strlen(sym->help);
 572                 while (sym->help[--len] == '\n')
 573                         sym->help[len] = 0;
 574                 fprintf(out, "  help\n%s\n", sym->help);
 575         }
 576         fputc('\n', out);
 577 }
 578
 579 void zconfdump(FILE *out)
 580 {
 581         //struct file *file;
 582         struct property *prop;
 583         struct symbol *sym;
 584         struct menu *menu;
 585
 586         menu = rootmenu.list;
 587         while (menu) {
 588                 if ((sym = menu->sym))
 589                         print_symbol(out, menu);
 590                 else if ((prop = menu->prompt)) {
 591                         switch (prop->type) {
 592                         //case T_MAINMENU:
 593                         //      fputs("\nmainmenu ", out);
 594                         //      print_quoted_string(out, prop->text);
 595                         //      fputs("\n", out);
 596                         //      break;
 597                         case P_COMMENT:
 598                                 fputs("\ncomment ", out);
 599                                 print_quoted_string(out, prop->text);
 600                                 fputs("\n", out);
 601                                 break;
 602                         case P_MENU:
 603                                 fputs("\nmenu ", out);
 604                                 print_quoted_string(out, prop->text);
 605                                 fputs("\n", out);
 606                                 break;
 607                         //case T_SOURCE:
 608                         //      fputs("\nsource ", out);
 609                         //      print_quoted_string(out, prop->text);
 610                         //      fputs("\n", out);
 611                         //      break;
 612                         //case T_IF:
 613                         //      fputs("\nif\n", out);
 614                         default:
 615                                 ;
 616                         }
 617                         if (!expr_is_yes(E_EXPR(prop->visible))) {
 618                                 fputs("  depends ", out);
 619                                 expr_fprint(E_EXPR(prop->visible), out);
 620                                 fputc('\n', out);
 621                         }
 622                         fputs("\n", out);
 623                 }
 624
 625                 if (menu->list)
 626                         menu = menu->list;
 627                 else if (menu->next)
 628                         menu = menu->next;
 629                 else while ((menu = menu->parent)) {
 630                         if (menu->prompt && menu->prompt->type == P_MENU)
 631                                 fputs("\nendmenu\n", out);
 632                         if (menu->next) {
 633                                 menu = menu->next;
 634                                 break;
 635                         }
 636                 }
 637         }
 638 }
 639
 640 #include "lex.zconf.c"
 641 #include "confdata.c"
 642 #include "expr.c"
 643 #include "symbol.c"
 644 #include "menu.c"