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 LKC_DIRECT_LINK
15#include "lkc.h"
16
17#define printd(mask, fmt...) if (cdebug & (mask)) printf(fmt)
18
19#define PRINTD		0x0001
20#define DEBUG_PARSE	0x0002
21
22int cdebug = PRINTD;
23
24extern int zconflex(void);
25static void zconfprint(const char *err, ...);
26static void zconf_error(const char *err, ...);
27static void zconferror(const char *err);
28static bool zconf_endtoken(struct kconf_id *id, int starttoken, int endtoken);
29
30struct symbol *symbol_hash[SYMBOL_HASHSIZE];
31
32static struct menu *current_menu, *current_entry;
33
34#define YYDEBUG 0
35#if YYDEBUG
36#define YYERROR_VERBOSE
37#endif
38%}
39%expect 30
40
41%union
42{
43	char *string;
44	struct file *file;
45	struct symbol *symbol;
46	struct expr *expr;
47	struct menu *menu;
48	struct kconf_id *id;
49}
50
51%token <id>T_MAINMENU
52%token <id>T_MENU
53%token <id>T_ENDMENU
54%token <id>T_SOURCE
55%token <id>T_CHOICE
56%token <id>T_ENDCHOICE
57%token <id>T_COMMENT
58%token <id>T_CONFIG
59%token <id>T_MENUCONFIG
60%token <id>T_HELP
61%token <string> T_HELPTEXT
62%token <id>T_IF
63%token <id>T_ENDIF
64%token <id>T_DEPENDS
65%token <id>T_OPTIONAL
66%token <id>T_PROMPT
67%token <id>T_TYPE
68%token <id>T_DEFAULT
69%token <id>T_SELECT
70%token <id>T_RANGE
71%token <id>T_VISIBLE
72%token <id>T_OPTION
73%token <id>T_ON
74%token <string> T_WORD
75%token <string> T_WORD_QUOTE
76%token T_UNEQUAL
77%token T_CLOSE_PAREN
78%token T_OPEN_PAREN
79%token T_EOL
80
81%left T_OR
82%left T_AND
83%left T_EQUAL T_UNEQUAL
84%nonassoc T_NOT
85
86%type <string> prompt
87%type <symbol> symbol
88%type <expr> expr
89%type <expr> if_expr
90%type <id> end
91%type <id> option_name
92%type <menu> if_entry menu_entry choice_entry
93%type <string> symbol_option_arg word_opt
94
95%destructor {
96	fprintf(stderr, "%s:%d: missing end statement for this entry\n",
97		$$->file->name, $$->lineno);
98	if (current_menu == $$)
99		menu_end_menu();
100} if_entry menu_entry choice_entry
101
102%{
103/* Include zconf.hash.c here so it can see the token constants. */
104#include "zconf.hash.c"
105%}
106
107%%
108input: nl start | start;
109
110start: mainmenu_stmt stmt_list | stmt_list;
111
112stmt_list:
113	  /* empty */
114	| stmt_list common_stmt
115	| stmt_list choice_stmt
116	| stmt_list menu_stmt
117	| stmt_list end			{ zconf_error("unexpected end statement"); }
118	| stmt_list T_WORD error T_EOL	{ zconf_error("unknown statement \"%s\"", $2); }
119	| stmt_list option_name error T_EOL
120{
121	zconf_error("unexpected option \"%s\"", kconf_id_strings + $2->name);
122}
123	| stmt_list error T_EOL		{ zconf_error("invalid statement"); }
124;
125
126option_name:
127	T_DEPENDS | T_PROMPT | T_TYPE | T_SELECT | T_OPTIONAL | T_RANGE | T_DEFAULT | T_VISIBLE
128;
129
130common_stmt:
131	  T_EOL
132	| if_stmt
133	| comment_stmt
134	| config_stmt
135	| menuconfig_stmt
136	| source_stmt
137;
138
139option_error:
140	  T_WORD error T_EOL		{ zconf_error("unknown option \"%s\"", $1); }
141	| error T_EOL			{ zconf_error("invalid option"); }
142;
143
144
145/* config/menuconfig entry */
146
147config_entry_start: T_CONFIG T_WORD T_EOL
148{
149	struct symbol *sym = sym_lookup($2, 0);
150	sym->flags |= SYMBOL_OPTIONAL;
151	menu_add_entry(sym);
152	printd(DEBUG_PARSE, "%s:%d:config %s\n", zconf_curname(), zconf_lineno(), $2);
153};
154
155config_stmt: config_entry_start config_option_list
156{
157	menu_end_entry();
158	printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
159};
160
161menuconfig_entry_start: T_MENUCONFIG T_WORD T_EOL
162{
163	struct symbol *sym = sym_lookup($2, 0);
164	sym->flags |= SYMBOL_OPTIONAL;
165	menu_add_entry(sym);
166	printd(DEBUG_PARSE, "%s:%d:menuconfig %s\n", zconf_curname(), zconf_lineno(), $2);
167};
168
169menuconfig_stmt: menuconfig_entry_start config_option_list
170{
171	if (current_entry->prompt)
172		current_entry->prompt->type = P_MENU;
173	else
174		zconfprint("warning: menuconfig statement without prompt");
175	menu_end_entry();
176	printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
177};
178
179config_option_list:
180	  /* empty */
181	| config_option_list config_option
182	| config_option_list symbol_option
183	| config_option_list depends
184	| config_option_list help
185	| config_option_list option_error
186	| config_option_list T_EOL
187;
188
189config_option: T_TYPE prompt_stmt_opt T_EOL
190{
191	menu_set_type($1->stype);
192	printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
193		zconf_curname(), zconf_lineno(),
194		$1->stype);
195};
196
197config_option: T_PROMPT prompt if_expr T_EOL
198{
199	menu_add_prompt(P_PROMPT, $2, $3);
200	printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
201};
202
203config_option: T_DEFAULT expr if_expr T_EOL
204{
205	menu_add_expr(P_DEFAULT, $2, $3);
206	if ($1->stype != S_UNKNOWN)
207		menu_set_type($1->stype);
208	printd(DEBUG_PARSE, "%s:%d:default(%u)\n",
209		zconf_curname(), zconf_lineno(),
210		$1->stype);
211};
212
213config_option: T_SELECT T_WORD if_expr T_EOL
214{
215	menu_add_symbol(P_SELECT, sym_lookup($2, 0), $3);
216	printd(DEBUG_PARSE, "%s:%d:select\n", zconf_curname(), zconf_lineno());
217};
218
219config_option: T_RANGE symbol symbol if_expr T_EOL
220{
221	menu_add_expr(P_RANGE, expr_alloc_comp(E_RANGE,$2, $3), $4);
222	printd(DEBUG_PARSE, "%s:%d:range\n", zconf_curname(), zconf_lineno());
223};
224
225symbol_option: T_OPTION symbol_option_list T_EOL
226;
227
228symbol_option_list:
229	  /* empty */
230	| symbol_option_list T_WORD symbol_option_arg
231{
232	struct kconf_id *id = kconf_id_lookup($2, strlen($2));
233	if (id && id->flags & TF_OPTION)
234		menu_add_option(id->token, $3);
235	else
236		zconfprint("warning: ignoring unknown option %s", $2);
237	free($2);
238};
239
240symbol_option_arg:
241	  /* empty */		{ $$ = NULL; }
242	| T_EQUAL prompt	{ $$ = $2; }
243;
244
245/* choice entry */
246
247choice: T_CHOICE word_opt T_EOL
248{
249	struct symbol *sym = sym_lookup($2, SYMBOL_CHOICE);
250	sym->flags |= SYMBOL_AUTO;
251	menu_add_entry(sym);
252	menu_add_expr(P_CHOICE, NULL, NULL);
253	printd(DEBUG_PARSE, "%s:%d:choice\n", zconf_curname(), zconf_lineno());
254};
255
256choice_entry: choice choice_option_list
257{
258	$$ = menu_add_menu();
259};
260
261choice_end: end
262{
263	if (zconf_endtoken($1, T_CHOICE, T_ENDCHOICE)) {
264		menu_end_menu();
265		printd(DEBUG_PARSE, "%s:%d:endchoice\n", zconf_curname(), zconf_lineno());
266	}
267};
268
269choice_stmt: choice_entry choice_block choice_end
270;
271
272choice_option_list:
273	  /* empty */
274	| choice_option_list choice_option
275	| choice_option_list depends
276	| choice_option_list help
277	| choice_option_list T_EOL
278	| choice_option_list option_error
279;
280
281choice_option: T_PROMPT prompt if_expr T_EOL
282{
283	menu_add_prompt(P_PROMPT, $2, $3);
284	printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
285};
286
287choice_option: T_TYPE prompt_stmt_opt T_EOL
288{
289	if ($1->stype == S_BOOLEAN || $1->stype == S_TRISTATE) {
290		menu_set_type($1->stype);
291		printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
292			zconf_curname(), zconf_lineno(),
293			$1->stype);
294	} else
295		YYERROR;
296};
297
298choice_option: T_OPTIONAL T_EOL
299{
300	current_entry->sym->flags |= SYMBOL_OPTIONAL;
301	printd(DEBUG_PARSE, "%s:%d:optional\n", zconf_curname(), zconf_lineno());
302};
303
304choice_option: T_DEFAULT T_WORD if_expr T_EOL
305{
306	if ($1->stype == S_UNKNOWN) {
307		menu_add_symbol(P_DEFAULT, sym_lookup($2, 0), $3);
308		printd(DEBUG_PARSE, "%s:%d:default\n",
309			zconf_curname(), zconf_lineno());
310	} else
311		YYERROR;
312};
313
314choice_block:
315	  /* empty */
316	| choice_block common_stmt
317;
318
319/* if entry */
320
321if_entry: T_IF expr nl
322{
323	printd(DEBUG_PARSE, "%s:%d:if\n", zconf_curname(), zconf_lineno());
324	menu_add_entry(NULL);
325	menu_add_dep($2);
326	$$ = menu_add_menu();
327};
328
329if_end: end
330{
331	if (zconf_endtoken($1, T_IF, T_ENDIF)) {
332		menu_end_menu();
333		printd(DEBUG_PARSE, "%s:%d:endif\n", zconf_curname(), zconf_lineno());
334	}
335};
336
337if_stmt: if_entry if_block if_end
338;
339
340if_block:
341	  /* empty */
342	| if_block common_stmt
343	| if_block menu_stmt
344	| if_block choice_stmt
345;
346
347/* mainmenu entry */
348
349mainmenu_stmt: T_MAINMENU prompt nl
350{
351	menu_add_prompt(P_MENU, $2, NULL);
352};
353
354/* menu entry */
355
356menu: T_MENU prompt T_EOL
357{
358	menu_add_entry(NULL);
359	menu_add_prompt(P_MENU, $2, NULL);
360	printd(DEBUG_PARSE, "%s:%d:menu\n", zconf_curname(), zconf_lineno());
361};
362
363menu_entry: menu visibility_list depends_list
364{
365	$$ = menu_add_menu();
366};
367
368menu_end: end
369{
370	if (zconf_endtoken($1, T_MENU, T_ENDMENU)) {
371		menu_end_menu();
372		printd(DEBUG_PARSE, "%s:%d:endmenu\n", zconf_curname(), zconf_lineno());
373	}
374};
375
376menu_stmt: menu_entry menu_block menu_end
377;
378
379menu_block:
380	  /* empty */
381	| menu_block common_stmt
382	| menu_block menu_stmt
383	| menu_block choice_stmt
384;
385
386source_stmt: T_SOURCE prompt T_EOL
387{
388	printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), $2);
389	zconf_nextfile($2);
390};
391
392/* comment entry */
393
394comment: T_COMMENT prompt T_EOL
395{
396	menu_add_entry(NULL);
397	menu_add_prompt(P_COMMENT, $2, NULL);
398	printd(DEBUG_PARSE, "%s:%d:comment\n", zconf_curname(), zconf_lineno());
399};
400
401comment_stmt: comment depends_list
402{
403	menu_end_entry();
404};
405
406/* help option */
407
408help_start: T_HELP T_EOL
409{
410	printd(DEBUG_PARSE, "%s:%d:help\n", zconf_curname(), zconf_lineno());
411	zconf_starthelp();
412};
413
414help: help_start T_HELPTEXT
415{
416	current_entry->help = $2;
417};
418
419/* depends option */
420
421depends_list:
422	  /* empty */
423	| depends_list depends
424	| depends_list T_EOL
425	| depends_list option_error
426;
427
428depends: T_DEPENDS T_ON expr T_EOL
429{
430	menu_add_dep($3);
431	printd(DEBUG_PARSE, "%s:%d:depends on\n", zconf_curname(), zconf_lineno());
432};
433
434/* visibility option */
435
436visibility_list:
437	  /* empty */
438	| visibility_list visible
439	| visibility_list T_EOL
440;
441
442visible: T_VISIBLE if_expr
443{
444	menu_add_visibility($2);
445};
446
447/* prompt statement */
448
449prompt_stmt_opt:
450	  /* empty */
451	| prompt if_expr
452{
453	menu_add_prompt(P_PROMPT, $1, $2);
454};
455
456prompt:	  T_WORD
457	| T_WORD_QUOTE
458;
459
460end:	  T_ENDMENU T_EOL	{ $$ = $1; }
461	| T_ENDCHOICE T_EOL	{ $$ = $1; }
462	| T_ENDIF T_EOL		{ $$ = $1; }
463;
464
465nl:
466	  T_EOL
467	| nl T_EOL
468;
469
470if_expr:  /* empty */			{ $$ = NULL; }
471	| T_IF expr			{ $$ = $2; }
472;
473
474expr:	  symbol				{ $$ = expr_alloc_symbol($1); }
475	| symbol T_EQUAL symbol			{ $$ = expr_alloc_comp(E_EQUAL, $1, $3); }
476	| symbol T_UNEQUAL symbol		{ $$ = expr_alloc_comp(E_UNEQUAL, $1, $3); }
477	| T_OPEN_PAREN expr T_CLOSE_PAREN	{ $$ = $2; }
478	| T_NOT expr				{ $$ = expr_alloc_one(E_NOT, $2); }
479	| expr T_OR expr			{ $$ = expr_alloc_two(E_OR, $1, $3); }
480	| expr T_AND expr			{ $$ = expr_alloc_two(E_AND, $1, $3); }
481;
482
483symbol:	  T_WORD	{ $$ = sym_lookup($1, 0); free($1); }
484	| T_WORD_QUOTE	{ $$ = sym_lookup($1, SYMBOL_CONST); free($1); }
485;
486
487word_opt: /* empty */			{ $$ = NULL; }
488	| T_WORD
489
490%%
491
492void conf_parse(const char *name)
493{
494	struct symbol *sym;
495	int i;
496
497	zconf_initscan(name);
498
499	sym_init();
500	_menu_init();
501	modules_sym = sym_lookup(NULL, 0);
502	modules_sym->type = S_BOOLEAN;
503	modules_sym->flags |= SYMBOL_AUTO;
504	rootmenu.prompt = menu_add_prompt(P_MENU, "Linux Kernel Configuration", NULL);
505
506#if YYDEBUG
507	if (getenv("ZCONF_DEBUG"))
508		zconfdebug = 1;
509#endif
510	zconfparse();
511	if (zconfnerrs)
512		exit(1);
513	if (!modules_sym->prop) {
514		struct property *prop;
515
516		prop = prop_alloc(P_DEFAULT, modules_sym);
517		prop->expr = expr_alloc_symbol(sym_lookup("MODULES", 0));
518	}
519
520	rootmenu.prompt->text = _(rootmenu.prompt->text);
521	rootmenu.prompt->text = sym_expand_string_value(rootmenu.prompt->text);
522
523	menu_finalize(&rootmenu);
524	for_all_symbols(i, sym) {
525		if (sym_check_deps(sym))
526			zconfnerrs++;
527        }
528	if (zconfnerrs)
529		exit(1);
530	sym_set_change_count(1);
531}
532
533static const char *zconf_tokenname(int token)
534{
535	switch (token) {
536	case T_MENU:		return "menu";
537	case T_ENDMENU:		return "endmenu";
538	case T_CHOICE:		return "choice";
539	case T_ENDCHOICE:	return "endchoice";
540	case T_IF:		return "if";
541	case T_ENDIF:		return "endif";
542	case T_DEPENDS:		return "depends";
543	case T_VISIBLE:		return "visible";
544	}
545	return "<token>";
546}
547
548static bool zconf_endtoken(struct kconf_id *id, int starttoken, int endtoken)
549{
550	if (id->token != endtoken) {
551		zconf_error("unexpected '%s' within %s block",
552			kconf_id_strings + id->name, zconf_tokenname(starttoken));
553		zconfnerrs++;
554		return false;
555	}
556	if (current_menu->file != current_file) {
557		zconf_error("'%s' in different file than '%s'",
558			kconf_id_strings + id->name, zconf_tokenname(starttoken));
559		fprintf(stderr, "%s:%d: location of the '%s'\n",
560			current_menu->file->name, current_menu->lineno,
561			zconf_tokenname(starttoken));
562		zconfnerrs++;
563		return false;
564	}
565	return true;
566}
567
568static void zconfprint(const char *err, ...)
569{
570	va_list ap;
571
572	fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
573	va_start(ap, err);
574	vfprintf(stderr, err, ap);
575	va_end(ap);
576	fprintf(stderr, "\n");
577}
578
579static void zconf_error(const char *err, ...)
580{
581	va_list ap;
582
583	zconfnerrs++;
584	fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
585	va_start(ap, err);
586	vfprintf(stderr, err, ap);
587	va_end(ap);
588	fprintf(stderr, "\n");
589}
590
591static void zconferror(const char *err)
592{
593#if YYDEBUG
594	fprintf(stderr, "%s:%d: %s\n", zconf_curname(), zconf_lineno() + 1, err);
595#endif
596}
597
598static void print_quoted_string(FILE *out, const char *str)
599{
600	const char *p;
601	int len;
602
603	putc('"', out);
604	while ((p = strchr(str, '"'))) {
605		len = p - str;
606		if (len)
607			fprintf(out, "%.*s", len, str);
608		fputs("\\\"", out);
609		str = p + 1;
610	}
611	fputs(str, out);
612	putc('"', out);
613}
614
615static void print_symbol(FILE *out, struct menu *menu)
616{
617	struct symbol *sym = menu->sym;
618	struct property *prop;
619
620	if (sym_is_choice(sym))
621		fprintf(out, "\nchoice\n");
622	else
623		fprintf(out, "\nconfig %s\n", sym->name);
624	switch (sym->type) {
625	case S_BOOLEAN:
626		fputs("  boolean\n", out);
627		break;
628	case S_TRISTATE:
629		fputs("  tristate\n", out);
630		break;
631	case S_STRING:
632		fputs("  string\n", out);
633		break;
634	case S_INT:
635		fputs("  integer\n", out);
636		break;
637	case S_HEX:
638		fputs("  hex\n", out);
639		break;
640	default:
641		fputs("  ???\n", out);
642		break;
643	}
644	for (prop = sym->prop; prop; prop = prop->next) {
645		if (prop->menu != menu)
646			continue;
647		switch (prop->type) {
648		case P_PROMPT:
649			fputs("  prompt ", out);
650			print_quoted_string(out, prop->text);
651			if (!expr_is_yes(prop->visible.expr)) {
652				fputs(" if ", out);
653				expr_fprint(prop->visible.expr, out);
654			}
655			fputc('\n', out);
656			break;
657		case P_DEFAULT:
658			fputs( "  default ", out);
659			expr_fprint(prop->expr, out);
660			if (!expr_is_yes(prop->visible.expr)) {
661				fputs(" if ", out);
662				expr_fprint(prop->visible.expr, out);
663			}
664			fputc('\n', out);
665			break;
666		case P_CHOICE:
667			fputs("  #choice value\n", out);
668			break;
669		case P_SELECT:
670			fputs( "  select ", out);
671			expr_fprint(prop->expr, out);
672			fputc('\n', out);
673			break;
674		case P_RANGE:
675			fputs( "  range ", out);
676			expr_fprint(prop->expr, out);
677			fputc('\n', out);
678			break;
679		case P_MENU:
680			fputs( "  menu ", out);
681			print_quoted_string(out, prop->text);
682			fputc('\n', out);
683			break;
684		default:
685			fprintf(out, "  unknown prop %d!\n", prop->type);
686			break;
687		}
688	}
689	if (menu->help) {
690		int len = strlen(menu->help);
691		while (menu->help[--len] == '\n')
692			menu->help[len] = 0;
693		fprintf(out, "  help\n%s\n", menu->help);
694	}
695}
696
697void zconfdump(FILE *out)
698{
699	struct property *prop;
700	struct symbol *sym;
701	struct menu *menu;
702
703	menu = rootmenu.list;
704	while (menu) {
705		if ((sym = menu->sym))
706			print_symbol(out, menu);
707		else if ((prop = menu->prompt)) {
708			switch (prop->type) {
709			case P_COMMENT:
710				fputs("\ncomment ", out);
711				print_quoted_string(out, prop->text);
712				fputs("\n", out);
713				break;
714			case P_MENU:
715				fputs("\nmenu ", out);
716				print_quoted_string(out, prop->text);
717				fputs("\n", out);
718				break;
719			default:
720				;
721			}
722			if (!expr_is_yes(prop->visible.expr)) {
723				fputs("  depends ", out);
724				expr_fprint(prop->visible.expr, out);
725				fputc('\n', out);
726			}
727		}
728
729		if (menu->list)
730			menu = menu->list;
731		else if (menu->next)
732			menu = menu->next;
733		else while ((menu = menu->parent)) {
734			if (menu->prompt && menu->prompt->type == P_MENU)
735				fputs("\nendmenu\n", out);
736			if (menu->next) {
737				menu = menu->next;
738				break;
739			}
740		}
741	}
742}
743
744#include "lex.zconf.c"
745#include "util.c"
746#include "confdata.c"
747#include "expr.c"
748#include "symbol.c"
749#include "menu.c"
750