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