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