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