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