projects/linux·blob v6.11 · refs

780 lines · 16.6 KiB

1/* SPDX-License-Identifier: GPL-2.0 */
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#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
23int cdebug = PRINTD;
24
25static void yyerror(const char *err);
26static void zconfprint(const char *err, ...);
27static void zconf_error(const char *err, ...);
28static bool zconf_endtoken(const char *tokenname,
29 const char *expected_tokenname);
30
31struct menu *current_menu, *current_entry, *current_choice;
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_PLUS_EQUAL
73%token T_PROMPT
74%token T_RANGE
75%token T_SELECT
76%token T_SOURCE
77%token T_STRING
78%token T_TRISTATE
79%token T_VISIBLE
80%token T_EOL
81%token <string> T_ASSIGN_VAL
82
83%left T_OR
84%left T_AND
85%left T_EQUAL T_UNEQUAL
86%left T_LESS T_LESS_EQUAL T_GREATER T_GREATER_EQUAL
87%nonassoc T_NOT
88
89%type <symbol> nonconst_symbol
90%type <symbol> symbol
91%type <type> type default
92%type <expr> expr
93%type <expr> if_expr
94%type <string> end
95%type <menu> if_entry menu_entry choice_entry
96%type <string> assign_val
97%type <flavor> assign_op
98
99%destructor {
100 fprintf(stderr, "%s:%d: missing end statement for this entry\n",
101 $$->filename, $$->lineno);
102 if (current_menu == $$)
103 menu_end_menu();
104} if_entry menu_entry choice_entry
105
106%%
107input: mainmenu_stmt stmt_list | stmt_list;
108
109/* mainmenu entry */
110
111mainmenu_stmt: T_MAINMENU T_WORD_QUOTE T_EOL
112{
113 menu_add_prompt(P_MENU, $2, NULL);
114};
115
116stmt_list:
117 /* empty */
118 | stmt_list assignment_stmt
119 | stmt_list choice_stmt
120 | stmt_list comment_stmt
121 | stmt_list config_stmt
122 | stmt_list if_stmt
123 | stmt_list menu_stmt
124 | stmt_list menuconfig_stmt
125 | stmt_list source_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
130stmt_list_in_choice:
131 /* empty */
132 | stmt_list_in_choice comment_stmt
133 | stmt_list_in_choice config_stmt
134 | stmt_list_in_choice if_stmt_in_choice
135 | stmt_list_in_choice error T_EOL { zconf_error("invalid statement"); }
136;
137
138/* config/menuconfig entry */
139
140config_entry_start: T_CONFIG nonconst_symbol T_EOL
141{
142 menu_add_entry($2);
143 printd(DEBUG_PARSE, "%s:%d:config %s\n", cur_filename, cur_lineno, $2->name);
144};
145
146config_stmt: config_entry_start config_option_list
147{
148 if (current_choice) {
149 if (!current_entry->prompt) {
150 fprintf(stderr, "%s:%d: error: choice member must have a prompt\n",
151 current_entry->filename, current_entry->lineno);
152 yynerrs++;
153 }
154
155 if (current_entry->sym->type != S_BOOLEAN) {
156 fprintf(stderr, "%s:%d: error: choice member must be bool\n",
157 current_entry->filename, current_entry->lineno);
158 yynerrs++;
159 }
160
161 list_add_tail(&current_entry->sym->choice_link,
162 &current_choice->choice_members);
163 }
164
165 printd(DEBUG_PARSE, "%s:%d:endconfig\n", cur_filename, cur_lineno);
166};
167
168menuconfig_entry_start: T_MENUCONFIG nonconst_symbol T_EOL
169{
170 menu_add_entry($2);
171 printd(DEBUG_PARSE, "%s:%d:menuconfig %s\n", cur_filename, cur_lineno, $2->name);
172};
173
174menuconfig_stmt: menuconfig_entry_start config_option_list
175{
176 if (current_entry->prompt)
177 current_entry->prompt->type = P_MENU;
178 else
179 zconfprint("warning: menuconfig statement without prompt");
180 printd(DEBUG_PARSE, "%s:%d:endconfig\n", cur_filename, cur_lineno);
181};
182
183config_option_list:
184 /* empty */
185 | config_option_list config_option
186 | config_option_list depends
187 | config_option_list help
188;
189
190config_option: type prompt_stmt_opt T_EOL
191{
192 menu_set_type($1);
193 printd(DEBUG_PARSE, "%s:%d:type(%u)\n", cur_filename, cur_lineno, $1);
194};
195
196config_option: T_PROMPT T_WORD_QUOTE if_expr T_EOL
197{
198 menu_add_prompt(P_PROMPT, $2, $3);
199 printd(DEBUG_PARSE, "%s:%d:prompt\n", cur_filename, cur_lineno);
200};
201
202config_option: default expr if_expr T_EOL
203{
204 menu_add_expr(P_DEFAULT, $2, $3);
205 if ($1 != S_UNKNOWN)
206 menu_set_type($1);
207 printd(DEBUG_PARSE, "%s:%d:default(%u)\n", cur_filename, cur_lineno,
208 $1);
209};
210
211config_option: T_SELECT nonconst_symbol if_expr T_EOL
212{
213 menu_add_symbol(P_SELECT, $2, $3);
214 printd(DEBUG_PARSE, "%s:%d:select\n", cur_filename, cur_lineno);
215};
216
217config_option: T_IMPLY nonconst_symbol if_expr T_EOL
218{
219 menu_add_symbol(P_IMPLY, $2, $3);
220 printd(DEBUG_PARSE, "%s:%d:imply\n", cur_filename, cur_lineno);
221};
222
223config_option: T_RANGE symbol symbol if_expr T_EOL
224{
225 menu_add_expr(P_RANGE, expr_alloc_comp(E_RANGE,$2, $3), $4);
226 printd(DEBUG_PARSE, "%s:%d:range\n", cur_filename, cur_lineno);
227};
228
229config_option: T_MODULES T_EOL
230{
231 if (modules_sym)
232 zconf_error("symbol '%s' redefines option 'modules' already defined by symbol '%s'",
233 current_entry->sym->name, modules_sym->name);
234 modules_sym = current_entry->sym;
235};
236
237/* choice entry */
238
239choice: T_CHOICE T_EOL
240{
241 struct symbol *sym = sym_lookup(NULL, 0);
242
243 menu_add_entry(sym);
244 menu_set_type(S_BOOLEAN);
245 INIT_LIST_HEAD(&current_entry->choice_members);
246
247 printd(DEBUG_PARSE, "%s:%d:choice\n", cur_filename, cur_lineno);
248};
249
250choice_entry: choice choice_option_list
251{
252 if (!current_entry->prompt) {
253 fprintf(stderr, "%s:%d: error: choice must have a prompt\n",
254 current_entry->filename, current_entry->lineno);
255 yynerrs++;
256 }
257
258 $$ = menu_add_menu();
259
260 current_choice = current_entry;
261};
262
263choice_end: end
264{
265 current_choice = NULL;
266
267 if (zconf_endtoken($1, "choice")) {
268 menu_end_menu();
269 printd(DEBUG_PARSE, "%s:%d:endchoice\n", cur_filename, cur_lineno);
270 }
271};
272
273choice_stmt: choice_entry stmt_list_in_choice choice_end
274;
275
276choice_option_list:
277 /* empty */
278 | choice_option_list choice_option
279 | choice_option_list depends
280 | choice_option_list help
281;
282
283choice_option: T_PROMPT T_WORD_QUOTE if_expr T_EOL
284{
285 menu_add_prompt(P_PROMPT, $2, $3);
286 printd(DEBUG_PARSE, "%s:%d:prompt\n", cur_filename, cur_lineno);
287};
288
289choice_option: T_BOOL T_WORD_QUOTE if_expr T_EOL
290{
291 menu_add_prompt(P_PROMPT, $2, $3);
292 printd(DEBUG_PARSE, "%s:%d:bool\n", cur_filename, cur_lineno);
293};
294
295choice_option: T_DEFAULT nonconst_symbol if_expr T_EOL
296{
297 menu_add_symbol(P_DEFAULT, $2, $3);
298 printd(DEBUG_PARSE, "%s:%d:default\n", cur_filename, cur_lineno);
299};
300
301type:
302 T_BOOL { $$ = S_BOOLEAN; }
303 | T_TRISTATE { $$ = S_TRISTATE; }
304 | T_INT { $$ = S_INT; }
305 | T_HEX { $$ = S_HEX; }
306 | T_STRING { $$ = S_STRING; }
307
308default:
309 T_DEFAULT { $$ = S_UNKNOWN; }
310 | T_DEF_BOOL { $$ = S_BOOLEAN; }
311 | T_DEF_TRISTATE { $$ = S_TRISTATE; }
312
313/* if entry */
314
315if_entry: T_IF expr T_EOL
316{
317 printd(DEBUG_PARSE, "%s:%d:if\n", cur_filename, cur_lineno);
318 menu_add_entry(NULL);
319 menu_add_dep($2);
320 $$ = menu_add_menu();
321};
322
323if_end: end
324{
325 if (zconf_endtoken($1, "if")) {
326 menu_end_menu();
327 printd(DEBUG_PARSE, "%s:%d:endif\n", cur_filename, cur_lineno);
328 }
329};
330
331if_stmt: if_entry stmt_list if_end
332;
333
334if_stmt_in_choice: if_entry stmt_list_in_choice if_end
335;
336
337/* menu entry */
338
339menu: T_MENU T_WORD_QUOTE T_EOL
340{
341 menu_add_entry(NULL);
342 menu_add_prompt(P_MENU, $2, NULL);
343 printd(DEBUG_PARSE, "%s:%d:menu\n", cur_filename, cur_lineno);
344};
345
346menu_entry: menu menu_option_list
347{
348 $$ = menu_add_menu();
349};
350
351menu_end: end
352{
353 if (zconf_endtoken($1, "menu")) {
354 menu_end_menu();
355 printd(DEBUG_PARSE, "%s:%d:endmenu\n", cur_filename, cur_lineno);
356 }
357};
358
359menu_stmt: menu_entry stmt_list menu_end
360;
361
362menu_option_list:
363 /* empty */
364 | menu_option_list visible
365 | menu_option_list depends
366;
367
368source_stmt: T_SOURCE T_WORD_QUOTE T_EOL
369{
370 printd(DEBUG_PARSE, "%s:%d:source %s\n", cur_filename, cur_lineno, $2);
371 zconf_nextfile($2);
372 free($2);
373};
374
375/* comment entry */
376
377comment: T_COMMENT T_WORD_QUOTE T_EOL
378{
379 menu_add_entry(NULL);
380 menu_add_prompt(P_COMMENT, $2, NULL);
381 printd(DEBUG_PARSE, "%s:%d:comment\n", cur_filename, cur_lineno);
382};
383
384comment_stmt: comment comment_option_list
385;
386
387comment_option_list:
388 /* empty */
389 | comment_option_list depends
390;
391
392/* help option */
393
394help_start: T_HELP T_EOL
395{
396 printd(DEBUG_PARSE, "%s:%d:help\n", cur_filename, cur_lineno);
397 zconf_starthelp();
398};
399
400help: help_start T_HELPTEXT
401{
402 if (current_entry->help) {
403 free(current_entry->help);
404 zconfprint("warning: '%s' defined with more than one help text -- only the last one will be used",
405 current_entry->sym->name ?: "<choice>");
406 }
407
408 /* Is the help text empty or all whitespace? */
409 if ($2[strspn($2, " \f\n\r\t\v")] == '\0')
410 zconfprint("warning: '%s' defined with blank help text",
411 current_entry->sym->name ?: "<choice>");
412
413 current_entry->help = $2;
414};
415
416/* depends option */
417
418depends: T_DEPENDS T_ON expr T_EOL
419{
420 menu_add_dep($3);
421 printd(DEBUG_PARSE, "%s:%d:depends on\n", cur_filename, cur_lineno);
422};
423
424/* visibility option */
425visible: T_VISIBLE if_expr T_EOL
426{
427 menu_add_visibility($2);
428};
429
430/* prompt statement */
431
432prompt_stmt_opt:
433 /* empty */
434 | T_WORD_QUOTE if_expr
435{
436 menu_add_prompt(P_PROMPT, $1, $2);
437};
438
439end: T_ENDMENU T_EOL { $$ = "menu"; }
440 | T_ENDCHOICE T_EOL { $$ = "choice"; }
441 | T_ENDIF T_EOL { $$ = "if"; }
442;
443
444if_expr: /* empty */ { $$ = NULL; }
445 | T_IF expr { $$ = $2; }
446;
447
448expr: symbol { $$ = expr_alloc_symbol($1); }
449 | symbol T_LESS symbol { $$ = expr_alloc_comp(E_LTH, $1, $3); }
450 | symbol T_LESS_EQUAL symbol { $$ = expr_alloc_comp(E_LEQ, $1, $3); }
451 | symbol T_GREATER symbol { $$ = expr_alloc_comp(E_GTH, $1, $3); }
452 | symbol T_GREATER_EQUAL symbol { $$ = expr_alloc_comp(E_GEQ, $1, $3); }
453 | symbol T_EQUAL symbol { $$ = expr_alloc_comp(E_EQUAL, $1, $3); }
454 | symbol T_UNEQUAL symbol { $$ = expr_alloc_comp(E_UNEQUAL, $1, $3); }
455 | T_OPEN_PAREN expr T_CLOSE_PAREN { $$ = $2; }
456 | T_NOT expr { $$ = expr_alloc_one(E_NOT, $2); }
457 | expr T_OR expr { $$ = expr_alloc_two(E_OR, $1, $3); }
458 | expr T_AND expr { $$ = expr_alloc_two(E_AND, $1, $3); }
459;
460
461/* For symbol definitions, selects, etc., where quotes are not accepted */
462nonconst_symbol: T_WORD { $$ = sym_lookup($1, 0); free($1); };
463
464symbol: nonconst_symbol
465 | T_WORD_QUOTE { $$ = sym_lookup($1, SYMBOL_CONST); free($1); }
466;
467
468/* assignment statement */
469
470assignment_stmt: T_WORD assign_op assign_val T_EOL { variable_add($1, $3, $2); free($1); free($3); }
471
472assign_op:
473 T_EQUAL { $$ = VAR_RECURSIVE; }
474 | T_COLON_EQUAL { $$ = VAR_SIMPLE; }
475 | T_PLUS_EQUAL { $$ = VAR_APPEND; }
476;
477
478assign_val:
479 /* empty */ { $$ = xstrdup(""); };
480 | T_ASSIGN_VAL
481;
482
483%%
484
485/**
486 * choice_check_sanity - check sanity of a choice member
487 *
488 * @menu: menu of the choice member
489 *
490 * Return: -1 if an error is found, 0 otherwise.
491 */
492static int choice_check_sanity(const struct menu *menu)
493{
494 struct property *prop;
495 int ret = 0;
496
497 for (prop = menu->sym->prop; prop; prop = prop->next) {
498 if (prop->type == P_DEFAULT) {
499 fprintf(stderr, "%s:%d: error: %s",
500 prop->filename, prop->lineno,
501 "defaults for choice values not supported\n");
502 ret = -1;
503 }
504
505 if (prop->menu != menu && prop->type == P_PROMPT &&
506 prop->menu->parent != menu->parent) {
507 fprintf(stderr, "%s:%d: error: %s",
508 prop->filename, prop->lineno,
509 "choice value has a prompt outside its choice group\n");
510 ret = -1;
511 }
512 }
513
514 return ret;
515}
516
517void conf_parse(const char *name)
518{
519 struct menu *menu;
520
521 autoconf_cmd = str_new();
522
523 str_printf(&autoconf_cmd, "\ndeps_config := \\\n");
524
525 zconf_initscan(name);
526
527 _menu_init();
528
529 if (getenv("ZCONF_DEBUG"))
530 yydebug = 1;
531 yyparse();
532
533 /*
534 * FIXME:
535 * cur_filename and cur_lineno are used even after yyparse();
536 * menu_finalize() calls menu_add_symbol(). This should be fixed.
537 */
538 cur_filename = "<none>";
539 cur_lineno = 0;
540
541 str_printf(&autoconf_cmd,
542 "\n"
543 "$(autoconfig): $(deps_config)\n"
544 "$(deps_config): ;\n");
545
546 env_write_dep(&autoconf_cmd);
547
548 /* Variables are expanded in the parse phase. We can free them here. */
549 variable_all_del();
550
551 if (yynerrs)
552 exit(1);
553 if (!modules_sym)
554 modules_sym = &symbol_no;
555
556 if (!menu_has_prompt(&rootmenu)) {
557 current_entry = &rootmenu;
558 menu_add_prompt(P_MENU, "Main menu", NULL);
559 }
560
561 menu_finalize();
562
563 menu_for_each_entry(menu) {
564 struct menu *child;
565
566 if (menu->sym && sym_check_deps(menu->sym))
567 yynerrs++;
568
569 if (menu->sym && sym_is_choice(menu->sym)) {
570 menu_for_each_sub_entry(child, menu)
571 if (child->sym && choice_check_sanity(child))
572 yynerrs++;
573 }
574 }
575
576 if (yynerrs)
577 exit(1);
578 conf_set_changed(true);
579}
580
581static bool zconf_endtoken(const char *tokenname,
582 const char *expected_tokenname)
583{
584 if (strcmp(tokenname, expected_tokenname)) {
585 zconf_error("unexpected '%s' within %s block",
586 tokenname, expected_tokenname);
587 yynerrs++;
588 return false;
589 }
590 if (strcmp(current_menu->filename, cur_filename)) {
591 zconf_error("'%s' in different file than '%s'",
592 tokenname, expected_tokenname);
593 fprintf(stderr, "%s:%d: location of the '%s'\n",
594 current_menu->filename, current_menu->lineno,
595 expected_tokenname);
596 yynerrs++;
597 return false;
598 }
599 return true;
600}
601
602static void zconfprint(const char *err, ...)
603{
604 va_list ap;
605
606 fprintf(stderr, "%s:%d: ", cur_filename, cur_lineno);
607 va_start(ap, err);
608 vfprintf(stderr, err, ap);
609 va_end(ap);
610 fprintf(stderr, "\n");
611}
612
613static void zconf_error(const char *err, ...)
614{
615 va_list ap;
616
617 yynerrs++;
618 fprintf(stderr, "%s:%d: ", cur_filename, cur_lineno);
619 va_start(ap, err);
620 vfprintf(stderr, err, ap);
621 va_end(ap);
622 fprintf(stderr, "\n");
623}
624
625static void yyerror(const char *err)
626{
627 fprintf(stderr, "%s:%d: %s\n", cur_filename, cur_lineno, err);
628}
629
630static void print_quoted_string(FILE *out, const char *str)
631{
632 const char *p;
633 int len;
634
635 putc('"', out);
636 while ((p = strchr(str, '"'))) {
637 len = p - str;
638 if (len)
639 fprintf(out, "%.*s", len, str);
640 fputs("\\\"", out);
641 str = p + 1;
642 }
643 fputs(str, out);
644 putc('"', out);
645}
646
647static void print_symbol(FILE *out, const struct menu *menu)
648{
649 struct symbol *sym = menu->sym;
650 struct property *prop;
651
652 if (sym_is_choice(sym))
653 fprintf(out, "\nchoice\n");
654 else
655 fprintf(out, "\nconfig %s\n", sym->name);
656 switch (sym->type) {
657 case S_BOOLEAN:
658 fputs(" bool\n", out);
659 break;
660 case S_TRISTATE:
661 fputs(" tristate\n", out);
662 break;
663 case S_STRING:
664 fputs(" string\n", out);
665 break;
666 case S_INT:
667 fputs(" integer\n", out);
668 break;
669 case S_HEX:
670 fputs(" hex\n", out);
671 break;
672 default:
673 fputs(" ???\n", out);
674 break;
675 }
676 for (prop = sym->prop; prop; prop = prop->next) {
677 if (prop->menu != menu)
678 continue;
679 switch (prop->type) {
680 case P_PROMPT:
681 fputs(" prompt ", out);
682 print_quoted_string(out, prop->text);
683 if (!expr_is_yes(prop->visible.expr)) {
684 fputs(" if ", out);
685 expr_fprint(prop->visible.expr, out);
686 }
687 fputc('\n', out);
688 break;
689 case P_DEFAULT:
690 fputs( " default ", out);
691 expr_fprint(prop->expr, out);
692 if (!expr_is_yes(prop->visible.expr)) {
693 fputs(" if ", out);
694 expr_fprint(prop->visible.expr, out);
695 }
696 fputc('\n', out);
697 break;
698 case P_SELECT:
699 fputs( " select ", out);
700 expr_fprint(prop->expr, out);
701 fputc('\n', out);
702 break;
703 case P_IMPLY:
704 fputs( " imply ", out);
705 expr_fprint(prop->expr, out);
706 fputc('\n', out);
707 break;
708 case P_RANGE:
709 fputs( " range ", out);
710 expr_fprint(prop->expr, out);
711 fputc('\n', out);
712 break;
713 case P_MENU:
714 fputs( " menu ", out);
715 print_quoted_string(out, prop->text);
716 fputc('\n', out);
717 break;
718 case P_SYMBOL:
719 fputs( " symbol ", out);
720 fprintf(out, "%s\n", prop->menu->sym->name);
721 break;
722 default:
723 fprintf(out, " unknown prop %d!\n", prop->type);
724 break;
725 }
726 }
727 if (menu->help) {
728 int len = strlen(menu->help);
729 while (menu->help[--len] == '\n')
730 menu->help[len] = 0;
731 fprintf(out, " help\n%s\n", menu->help);
732 }
733}
734
735void zconfdump(FILE *out)
736{
737 struct property *prop;
738 struct symbol *sym;
739 struct menu *menu;
740
741 menu = rootmenu.list;
742 while (menu) {
743 if ((sym = menu->sym))
744 print_symbol(out, menu);
745 else if ((prop = menu->prompt)) {
746 switch (prop->type) {
747 case P_COMMENT:
748 fputs("\ncomment ", out);
749 print_quoted_string(out, prop->text);
750 fputs("\n", out);
751 break;
752 case P_MENU:
753 fputs("\nmenu ", out);
754 print_quoted_string(out, prop->text);
755 fputs("\n", out);
756 break;
757 default:
758 ;
759 }
760 if (!expr_is_yes(prop->visible.expr)) {
761 fputs(" depends ", out);
762 expr_fprint(prop->visible.expr, out);
763 fputc('\n', out);
764 }
765 }
766
767 if (menu->list)
768 menu = menu->list;
769 else if (menu->next)
770 menu = menu->next;
771 else while ((menu = menu->parent)) {
772 if (menu->prompt && menu->prompt->type == P_MENU)
773 fputs("\nendmenu\n", out);
774 if (menu->next) {
775 menu = menu->next;
776 break;
777 }
778 }
779 }
780}