Root/scripts/kconfig/zconf.y

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

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