summaryrefslogtreecommitdiff
path: root/scripts/kconfig/parser.y
blob: af770bf758ad2b5dc074674090aa3d15ef6c2255 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
 */
%{

#include <ctype.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>

#include "lkc.h"

#define printd(mask, fmt...) if (cdebug & (mask)) printf(fmt)

#define PRINTD		0x0001
#define DEBUG_PARSE	0x0002

int cdebug = PRINTD;

static void yyerror(const char *err);
static void zconfprint(const char *err, ...);
static void zconf_error(const char *err, ...);
static bool zconf_endtoken(const char *tokenname,
			   const char *expected_tokenname);

struct symbol *symbol_hash[SYMBOL_HASHSIZE];

static struct menu *current_menu, *current_entry;

%}

%union
{
	char *string;
	struct symbol *symbol;
	struct expr *expr;
	struct menu *menu;
	enum symbol_type type;
	enum variable_flavor flavor;
}

%token <string> T_HELPTEXT
%token <string> T_WORD
%token <string> T_WORD_QUOTE
%token T_ALLNOCONFIG_Y
%token T_BOOL
%token T_CHOICE
%token T_CLOSE_PAREN
%token T_COLON_EQUAL
%token T_COMMENT
%token T_CONFIG
%token T_DEFAULT
%token T_DEFCONFIG_LIST
%token T_DEF_BOOL
%token T_DEF_TRISTATE
%token T_DEPENDS
%token T_ENDCHOICE
%token T_ENDIF
%token T_ENDMENU
%token T_HELP
%token T_HEX
%token T_IF
%token T_IMPLY
%token T_INT
%token T_MAINMENU
%token T_MENU
%token T_MENUCONFIG
%token T_MODULES
%token T_ON
%token T_OPEN_PAREN
%token T_OPTION
%token T_OPTIONAL
%token T_PLUS_EQUAL
%token T_PROMPT
%token T_RANGE
%token T_SELECT
%token T_SOURCE
%token T_STRING
%token T_TRISTATE
%token T_VISIBLE
%token T_EOL
%token <string> T_ASSIGN_VAL

%left T_OR
%left T_AND
%left T_EQUAL T_UNEQUAL
%left T_LESS T_LESS_EQUAL T_GREATER T_GREATER_EQUAL
%nonassoc T_NOT

%type <symbol> nonconst_symbol
%type <symbol> symbol
%type <type> type logic_type default
%type <expr> expr
%type <expr> if_expr
%type <string> end
%type <menu> if_entry menu_entry choice_entry
%type <string> word_opt assign_val
%type <flavor> assign_op

%destructor {
	fprintf(stderr, "%s:%d: missing end statement for this entry\n",
		$$->file->name, $$->lineno);
	if (current_menu == $$)
		menu_end_menu();
} if_entry menu_entry choice_entry

%%
input: mainmenu_stmt stmt_list | stmt_list;

/* mainmenu entry */

mainmenu_stmt: T_MAINMENU T_WORD_QUOTE T_EOL
{
	menu_add_prompt(P_MENU, $2, NULL);
};

stmt_list:
	  /* empty */
	| stmt_list common_stmt
	| stmt_list choice_stmt
	| stmt_list menu_stmt
	| stmt_list T_WORD error T_EOL	{ zconf_error("unknown statement \"%s\"", $2); }
	| stmt_list error T_EOL		{ zconf_error("invalid statement"); }
;

common_stmt:
	  if_stmt
	| comment_stmt
	| config_stmt
	| menuconfig_stmt
	| source_stmt
	| assignment_stmt
;

/* config/menuconfig entry */

config_entry_start: T_CONFIG nonconst_symbol T_EOL
{
	$2->flags |= SYMBOL_OPTIONAL;
	menu_add_entry($2);
	printd(DEBUG_PARSE, "%s:%d:config %s\n", zconf_curname(), zconf_lineno(), $2->name);
};

config_stmt: config_entry_start config_option_list
{
	printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
};

menuconfig_entry_start: T_MENUCONFIG nonconst_symbol T_EOL
{
	$2->flags |= SYMBOL_OPTIONAL;
	menu_add_entry($2);
	printd(DEBUG_PARSE, "%s:%d:menuconfig %s\n", zconf_curname(), zconf_lineno(), $2->name);
};

menuconfig_stmt: menuconfig_entry_start config_option_list
{
	if (current_entry->prompt)
		current_entry->prompt->type = P_MENU;
	else
		zconfprint("warning: menuconfig statement without prompt");
	printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
};

config_option_list:
	  /* empty */
	| config_option_list config_option
	| config_option_list depends
	| config_option_list help
;

config_option: type prompt_stmt_opt T_EOL
{
	menu_set_type($1);
	printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
		zconf_curname(), zconf_lineno(),
		$1);
};

config_option: T_PROMPT T_WORD_QUOTE if_expr T_EOL
{
	menu_add_prompt(P_PROMPT, $2, $3);
	printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
};

config_option: default expr if_expr T_EOL
{
	menu_add_expr(P_DEFAULT, $2, $3);
	if ($1 != S_UNKNOWN)
		menu_set_type($1);
	printd(DEBUG_PARSE, "%s:%d:default(%u)\n",
		zconf_curname(), zconf_lineno(),
		$1);
};

config_option: T_SELECT nonconst_symbol if_expr T_EOL
{
	menu_add_symbol(P_SELECT, $2, $3);
	printd(DEBUG_PARSE, "%s:%d:select\n", zconf_curname(), zconf_lineno());
};

config_option: T_IMPLY nonconst_symbol if_expr T_EOL
{
	menu_add_symbol(P_IMPLY, $2, $3);
	printd(DEBUG_PARSE, "%s:%d:imply\n", zconf_curname(), zconf_lineno());
};

config_option: T_RANGE symbol symbol if_expr T_EOL
{
	menu_add_expr(P_RANGE, expr_alloc_comp(E_RANGE,$2, $3), $4);
	printd(DEBUG_PARSE, "%s:%d:range\n", zconf_curname(), zconf_lineno());
};

config_option: T_OPTION T_MODULES T_EOL
{
	menu_add_option_modules();
};

config_option: T_OPTION T_DEFCONFIG_LIST T_EOL
{
	menu_add_option_defconfig_list();
};

config_option: T_OPTION T_ALLNOCONFIG_Y T_EOL
{
	menu_add_option_allnoconfig_y();
};

/* choice entry */

choice: T_CHOICE word_opt T_EOL
{
	struct symbol *sym = sym_lookup($2, SYMBOL_CHOICE);
	sym->flags |= SYMBOL_NO_WRITE;
	menu_add_entry(sym);
	menu_add_expr(P_CHOICE, NULL, NULL);
	free($2);
	printd(DEBUG_PARSE, "%s:%d:choice\n", zconf_curname(), zconf_lineno());
};

choice_entry: choice choice_option_list
{
	$$ = menu_add_menu();
};

choice_end: end
{
	if (zconf_endtoken($1, "choice")) {
		menu_end_menu();
		printd(DEBUG_PARSE, "%s:%d:endchoice\n", zconf_curname(), zconf_lineno());
	}
};

choice_stmt: choice_entry choice_block choice_end
;

choice_option_list:
	  /* empty */
	| choice_option_list choice_option
	| choice_option_list depends
	| choice_option_list help
;

choice_option: T_PROMPT T_WORD_QUOTE if_expr T_EOL
{
	menu_add_prompt(P_PROMPT, $2, $3);
	printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
};

choice_option: logic_type prompt_stmt_opt T_EOL
{
	menu_set_type($1);
	printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
	       zconf_curname(), zconf_lineno(), $1);
};

choice_option: T_OPTIONAL T_EOL
{
	current_entry->sym->flags |= SYMBOL_OPTIONAL;
	printd(DEBUG_PARSE, "%s:%d:optional\n", zconf_curname(), zconf_lineno());
};

choice_option: T_DEFAULT nonconst_symbol if_expr T_EOL
{
	menu_add_symbol(P_DEFAULT, $2, $3);
	printd(DEBUG_PARSE, "%s:%d:default\n",
	       zconf_curname(), zconf_lineno());
};

type:
	  logic_type
	| T_INT			{ $$ = S_INT; }
	| T_HEX			{ $$ = S_HEX; }
	| T_STRING		{ $$ = S_STRING; }

logic_type:
	  T_BOOL		{ $$ = S_BOOLEAN; }
	| T_TRISTATE		{ $$ = S_TRISTATE; }

default:
	  T_DEFAULT		{ $$ = S_UNKNOWN; }
	| T_DEF_BOOL		{ $$ = S_BOOLEAN; }
	| T_DEF_TRISTATE	{ $$ = S_TRISTATE; }

choice_block:
	  /* empty */
	| choice_block common_stmt
;

/* if entry */

if_entry: T_IF expr T_EOL
{
	printd(DEBUG_PARSE, "%s:%d:if\n", zconf_curname(), zconf_lineno());
	menu_add_entry(NULL);
	menu_add_dep($2);
	$$ = menu_add_menu();
};

if_end: end
{
	if (zconf_endtoken($1, "if")) {
		menu_end_menu();
		printd(DEBUG_PARSE, "%s:%d:endif\n", zconf_curname(), zconf_lineno());
	}
};

if_stmt: if_entry stmt_list if_end
;

/* menu entry */

menu: T_MENU T_WORD_QUOTE T_EOL
{
	menu_add_entry(NULL);
	menu_add_prompt(P_MENU, $2, NULL);
	printd(DEBUG_PARSE, "%s:%d:menu\n", zconf_curname(), zconf_lineno());
};

menu_entry: menu menu_option_list
{
	$$ = menu_add_menu();
};

menu_end: end
{
	if (zconf_endtoken($1, "menu")) {
		menu_end_menu();
		printd(DEBUG_PARSE, "%s:%d:endmenu\n", zconf_curname(), zconf_lineno());
	}
};

menu_stmt: menu_entry stmt_list menu_end
;

menu_option_list:
	  /* empty */
	| menu_option_list visible
	| menu_option_list depends
;

source_stmt: T_SOURCE T_WORD_QUOTE T_EOL
{
	printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), $2);
	zconf_nextfile($2);
	free($2);
};

/* comment entry */

comment: T_COMMENT T_WORD_QUOTE T_EOL
{
	menu_add_entry(NULL);
	menu_add_prompt(P_COMMENT, $2, NULL);
	printd(DEBUG_PARSE, "%s:%d:comment\n", zconf_curname(), zconf_lineno());
};

comment_stmt: comment comment_option_list
;

comment_option_list:
	  /* empty */
	| comment_option_list depends
;

/* help option */

help_start: T_HELP T_EOL
{
	printd(DEBUG_PARSE, "%s:%d:help\n", zconf_curname(), zconf_lineno());
	zconf_starthelp();
};

help: help_start T_HELPTEXT
{
	if (current_entry->help) {
		free(current_entry->help);
		zconfprint("warning: '%s' defined with more than one help text -- only the last one will be used",
			   current_entry->sym->name ?: "<choice>");
	}

	/* Is the help text empty or all whitespace? */
	if ($2[strspn($2, " \f\n\r\t\v")] == '\0')
		zconfprint("warning: '%s' defined with blank help text",
			   current_entry->sym->name ?: "<choice>");

	current_entry->help = $2;
};

/* depends option */

depends: T_DEPENDS T_ON expr T_EOL
{
	menu_add_dep($3);
	printd(DEBUG_PARSE, "%s:%d:depends on\n", zconf_curname(), zconf_lineno());
};

/* visibility option */
visible: T_VISIBLE if_expr T_EOL
{
	menu_add_visibility($2);
};

/* prompt statement */

prompt_stmt_opt:
	  /* empty */
	| T_WORD_QUOTE if_expr
{
	menu_add_prompt(P_PROMPT, $1, $2);
};

end:	  T_ENDMENU T_EOL	{ $$ = "menu"; }
	| T_ENDCHOICE T_EOL	{ $$ = "choice"; }
	| T_ENDIF T_EOL		{ $$ = "if"; }
;

if_expr:  /* empty */			{ $$ = NULL; }
	| T_IF expr			{ $$ = $2; }
;

expr:	  symbol				{ $$ = expr_alloc_symbol($1); }
	| symbol T_LESS symbol			{ $$ = expr_alloc_comp(E_LTH, $1, $3); }
	| symbol T_LESS_EQUAL symbol		{ $$ = expr_alloc_comp(E_LEQ, $1, $3); }
	| symbol T_GREATER symbol		{ $$ = expr_alloc_comp(E_GTH, $1, $3); }
	| symbol T_GREATER_EQUAL symbol		{ $$ = expr_alloc_comp(E_GEQ, $1, $3); }
	| symbol T_EQUAL symbol			{ $$ = expr_alloc_comp(E_EQUAL, $1, $3); }
	| symbol T_UNEQUAL symbol		{ $$ = expr_alloc_comp(E_UNEQUAL, $1, $3); }
	| T_OPEN_PAREN expr T_CLOSE_PAREN	{ $$ = $2; }
	| T_NOT expr				{ $$ = expr_alloc_one(E_NOT, $2); }
	| expr T_OR expr			{ $$ = expr_alloc_two(E_OR, $1, $3); }
	| expr T_AND expr			{ $$ = expr_alloc_two(E_AND, $1, $3); }
;

/* For symbol definitions, selects, etc., where quotes are not accepted */
nonconst_symbol: T_WORD { $$ = sym_lookup($1, 0); free($1); };

symbol:	  nonconst_symbol
	| T_WORD_QUOTE	{ $$ = sym_lookup($1, SYMBOL_CONST); free($1); }
;

word_opt: /* empty */			{ $$ = NULL; }
	| T_WORD

/* assignment statement */

assignment_stmt:  T_WORD assign_op assign_val T_EOL	{ variable_add($1, $3, $2); free($1); free($3); }

assign_op:
	  T_EQUAL	{ $$ = VAR_RECURSIVE; }
	| T_COLON_EQUAL	{ $$ = VAR_SIMPLE; }
	| T_PLUS_EQUAL	{ $$ = VAR_APPEND; }
;

assign_val:
	/* empty */		{ $$ = xstrdup(""); };
	| T_ASSIGN_VAL
;

%%

void conf_parse(const char *name)
{
	struct symbol *sym;
	int i;

	zconf_initscan(name);

	_menu_init();

	if (getenv("ZCONF_DEBUG"))
		yydebug = 1;
	yyparse();

	/* Variables are expanded in the parse phase. We can free them here. */
	variable_all_del();

	if (yynerrs)
		exit(1);
	if (!modules_sym)
		modules_sym = sym_find( "n" );

	if (!menu_has_prompt(&rootmenu)) {
		current_entry = &rootmenu;
		menu_add_prompt(P_MENU, "Main menu", NULL);
	}

	menu_finalize(&rootmenu);
	for_all_symbols(i, sym) {
		if (sym_check_deps(sym))
			yynerrs++;
	}
	if (yynerrs)
		exit(1);
	sym_set_change_count(1);
}

static bool zconf_endtoken(const char *tokenname,
			   const char *expected_tokenname)
{
	if (strcmp(tokenname, expected_tokenname)) {
		zconf_error("unexpected '%s' within %s block",
			    tokenname, expected_tokenname);
		yynerrs++;
		return false;
	}
	if (current_menu->file != current_file) {
		zconf_error("'%s' in different file than '%s'",
			    tokenname, expected_tokenname);
		fprintf(stderr, "%s:%d: location of the '%s'\n",
			current_menu->file->name, current_menu->lineno,
			expected_tokenname);
		yynerrs++;
		return false;
	}
	return true;
}

static void zconfprint(const char *err, ...)
{
	va_list ap;

	fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
	va_start(ap, err);
	vfprintf(stderr, err, ap);
	va_end(ap);
	fprintf(stderr, "\n");
}

static void zconf_error(const char *err, ...)
{
	va_list ap;

	yynerrs++;
	fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
	va_start(ap, err);
	vfprintf(stderr, err, ap);
	va_end(ap);
	fprintf(stderr, "\n");
}

static void yyerror(const char *err)
{
	fprintf(stderr, "%s:%d: %s\n", zconf_curname(), zconf_lineno() + 1, err);
}

static void print_quoted_string(FILE *out, const char *str)
{
	const char *p;
	int len;

	putc('"', out);
	while ((p = strchr(str, '"'))) {
		len = p - str;
		if (len)
			fprintf(out, "%.*s", len, str);
		fputs("\\\"", out);
		str = p + 1;
	}
	fputs(str, out);
	putc('"', out);
}

static void print_symbol(FILE *out, struct menu *menu)
{
	struct symbol *sym = menu->sym;
	struct property *prop;

	if (sym_is_choice(sym))
		fprintf(out, "\nchoice\n");
	else
		fprintf(out, "\nconfig %s\n", sym->name);
	switch (sym->type) {
	case S_BOOLEAN:
		fputs("  bool\n", out);
		break;
	case S_TRISTATE:
		fputs("  tristate\n", out);
		break;
	case S_STRING:
		fputs("  string\n", out);
		break;
	case S_INT:
		fputs("  integer\n", out);
		break;
	case S_HEX:
		fputs("  hex\n", out);
		break;
	default:
		fputs("  ???\n", out);
		break;
	}
	for (prop = sym->prop; prop; prop = prop->next) {
		if (prop->menu != menu)
			continue;
		switch (prop->type) {
		case P_PROMPT:
			fputs("  prompt ", out);
			print_quoted_string(out, prop->text);
			if (!expr_is_yes(prop->visible.expr)) {
				fputs(" if ", out);
				expr_fprint(prop->visible.expr, out);
			}
			fputc('\n', out);
			break;
		case P_DEFAULT:
			fputs( "  default ", out);
			expr_fprint(prop->expr, out);
			if (!expr_is_yes(prop->visible.expr)) {
				fputs(" if ", out);
				expr_fprint(prop->visible.expr, out);
			}
			fputc('\n', out);
			break;
		case P_CHOICE:
			fputs("  #choice value\n", out);
			break;
		case P_SELECT:
			fputs( "  select ", out);
			expr_fprint(prop->expr, out);
			fputc('\n', out);
			break;
		case P_IMPLY:
			fputs( "  imply ", out);
			expr_fprint(prop->expr, out);
			fputc('\n', out);
			break;
		case P_RANGE:
			fputs( "  range ", out);
			expr_fprint(prop->expr, out);
			fputc('\n', out);
			break;
		case P_MENU:
			fputs( "  menu ", out);
			print_quoted_string(out, prop->text);
			fputc('\n', out);
			break;
		case P_SYMBOL:
			fputs( "  symbol ", out);
			fprintf(out, "%s\n", prop->sym->name);
			break;
		default:
			fprintf(out, "  unknown prop %d!\n", prop->type);
			break;
		}
	}
	if (menu->help) {
		int len = strlen(menu->help);
		while (menu->help[--len] == '\n')
			menu->help[len] = 0;
		fprintf(out, "  help\n%s\n", menu->help);
	}
}

void zconfdump(FILE *out)
{
	struct property *prop;
	struct symbol *sym;
	struct menu *menu;

	menu = rootmenu.list;
	while (menu) {
		if ((sym = menu->sym))
			print_symbol(out, menu);
		else if ((prop = menu->prompt)) {
			switch (prop->type) {
			case P_COMMENT:
				fputs("\ncomment ", out);
				print_quoted_string(out, prop->text);
				fputs("\n", out);
				break;
			case P_MENU:
				fputs("\nmenu ", out);
				print_quoted_string(out, prop->text);
				fputs("\n", out);
				break;
			default:
				;
			}
			if (!expr_is_yes(prop->visible.expr)) {
				fputs("  depends ", out);
				expr_fprint(prop->visible.expr, out);
				fputc('\n', out);
			}
		}

		if (menu->list)
			menu = menu->list;
		else if (menu->next)
			menu = menu->next;
		else while ((menu = menu->parent)) {
			if (menu->prompt && menu->prompt->type == P_MENU)
				fputs("\nendmenu\n", out);
			if (menu->next) {
				menu = menu->next;
				break;
			}
		}
	}
}

#include "menu.c"