Root/scripts/config/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#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

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