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1da177e4 LT |
1 | /* |
2 | * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org> | |
3 | * Released under the terms of the GNU GPL v2.0. | |
4 | */ | |
5 | ||
6 | #include <ctype.h> | |
7 | #include <stdlib.h> | |
8 | #include <string.h> | |
9 | #include <regex.h> | |
10 | #include <sys/utsname.h> | |
11 | ||
12 | #define LKC_DIRECT_LINK | |
13 | #include "lkc.h" | |
14 | ||
15 | struct symbol symbol_yes = { | |
16 | .name = "y", | |
17 | .curr = { "y", yes }, | |
18 | .flags = SYMBOL_YES|SYMBOL_VALID, | |
19 | }, symbol_mod = { | |
20 | .name = "m", | |
21 | .curr = { "m", mod }, | |
22 | .flags = SYMBOL_MOD|SYMBOL_VALID, | |
23 | }, symbol_no = { | |
24 | .name = "n", | |
25 | .curr = { "n", no }, | |
26 | .flags = SYMBOL_NO|SYMBOL_VALID, | |
27 | }, symbol_empty = { | |
28 | .name = "", | |
29 | .curr = { "", no }, | |
30 | .flags = SYMBOL_VALID, | |
31 | }; | |
32 | ||
33 | int sym_change_count; | |
34 | struct symbol *modules_sym; | |
35 | tristate modules_val; | |
36 | ||
37 | void sym_add_default(struct symbol *sym, const char *def) | |
38 | { | |
39 | struct property *prop = prop_alloc(P_DEFAULT, sym); | |
40 | ||
41 | prop->expr = expr_alloc_symbol(sym_lookup(def, 1)); | |
42 | } | |
43 | ||
44 | void sym_init(void) | |
45 | { | |
46 | struct symbol *sym; | |
47 | struct utsname uts; | |
48 | char *p; | |
49 | static bool inited = false; | |
50 | ||
51 | if (inited) | |
52 | return; | |
53 | inited = true; | |
54 | ||
55 | uname(&uts); | |
56 | ||
57 | sym = sym_lookup("ARCH", 0); | |
58 | sym->type = S_STRING; | |
59 | sym->flags |= SYMBOL_AUTO; | |
60 | p = getenv("ARCH"); | |
61 | if (p) | |
62 | sym_add_default(sym, p); | |
63 | ||
64 | sym = sym_lookup("KERNELRELEASE", 0); | |
65 | sym->type = S_STRING; | |
66 | sym->flags |= SYMBOL_AUTO; | |
67 | p = getenv("KERNELRELEASE"); | |
68 | if (p) | |
69 | sym_add_default(sym, p); | |
70 | ||
71 | sym = sym_lookup("UNAME_RELEASE", 0); | |
72 | sym->type = S_STRING; | |
73 | sym->flags |= SYMBOL_AUTO; | |
74 | sym_add_default(sym, uts.release); | |
75 | } | |
76 | ||
77 | enum symbol_type sym_get_type(struct symbol *sym) | |
78 | { | |
79 | enum symbol_type type = sym->type; | |
80 | ||
81 | if (type == S_TRISTATE) { | |
82 | if (sym_is_choice_value(sym) && sym->visible == yes) | |
83 | type = S_BOOLEAN; | |
84 | else if (modules_val == no) | |
85 | type = S_BOOLEAN; | |
86 | } | |
87 | return type; | |
88 | } | |
89 | ||
90 | const char *sym_type_name(enum symbol_type type) | |
91 | { | |
92 | switch (type) { | |
93 | case S_BOOLEAN: | |
94 | return "boolean"; | |
95 | case S_TRISTATE: | |
96 | return "tristate"; | |
97 | case S_INT: | |
98 | return "integer"; | |
99 | case S_HEX: | |
100 | return "hex"; | |
101 | case S_STRING: | |
102 | return "string"; | |
103 | case S_UNKNOWN: | |
104 | return "unknown"; | |
105 | case S_OTHER: | |
106 | break; | |
107 | } | |
108 | return "???"; | |
109 | } | |
110 | ||
111 | struct property *sym_get_choice_prop(struct symbol *sym) | |
112 | { | |
113 | struct property *prop; | |
114 | ||
115 | for_all_choices(sym, prop) | |
116 | return prop; | |
117 | return NULL; | |
118 | } | |
119 | ||
120 | struct property *sym_get_default_prop(struct symbol *sym) | |
121 | { | |
122 | struct property *prop; | |
123 | ||
124 | for_all_defaults(sym, prop) { | |
125 | prop->visible.tri = expr_calc_value(prop->visible.expr); | |
126 | if (prop->visible.tri != no) | |
127 | return prop; | |
128 | } | |
129 | return NULL; | |
130 | } | |
131 | ||
132 | struct property *sym_get_range_prop(struct symbol *sym) | |
133 | { | |
134 | struct property *prop; | |
135 | ||
136 | for_all_properties(sym, prop, P_RANGE) { | |
137 | prop->visible.tri = expr_calc_value(prop->visible.expr); | |
138 | if (prop->visible.tri != no) | |
139 | return prop; | |
140 | } | |
141 | return NULL; | |
142 | } | |
143 | ||
144 | static void sym_calc_visibility(struct symbol *sym) | |
145 | { | |
146 | struct property *prop; | |
147 | tristate tri; | |
148 | ||
149 | /* any prompt visible? */ | |
150 | tri = no; | |
151 | for_all_prompts(sym, prop) { | |
152 | prop->visible.tri = expr_calc_value(prop->visible.expr); | |
153 | tri = E_OR(tri, prop->visible.tri); | |
154 | } | |
155 | if (tri == mod && (sym->type != S_TRISTATE || modules_val == no)) | |
156 | tri = yes; | |
157 | if (sym->visible != tri) { | |
158 | sym->visible = tri; | |
159 | sym_set_changed(sym); | |
160 | } | |
161 | if (sym_is_choice_value(sym)) | |
162 | return; | |
163 | tri = no; | |
164 | if (sym->rev_dep.expr) | |
165 | tri = expr_calc_value(sym->rev_dep.expr); | |
166 | if (tri == mod && sym_get_type(sym) == S_BOOLEAN) | |
167 | tri = yes; | |
168 | if (sym->rev_dep.tri != tri) { | |
169 | sym->rev_dep.tri = tri; | |
170 | sym_set_changed(sym); | |
171 | } | |
172 | } | |
173 | ||
174 | static struct symbol *sym_calc_choice(struct symbol *sym) | |
175 | { | |
176 | struct symbol *def_sym; | |
177 | struct property *prop; | |
178 | struct expr *e; | |
179 | ||
180 | /* is the user choice visible? */ | |
181 | def_sym = sym->user.val; | |
182 | if (def_sym) { | |
183 | sym_calc_visibility(def_sym); | |
184 | if (def_sym->visible != no) | |
185 | return def_sym; | |
186 | } | |
187 | ||
188 | /* any of the defaults visible? */ | |
189 | for_all_defaults(sym, prop) { | |
190 | prop->visible.tri = expr_calc_value(prop->visible.expr); | |
191 | if (prop->visible.tri == no) | |
192 | continue; | |
193 | def_sym = prop_get_symbol(prop); | |
194 | sym_calc_visibility(def_sym); | |
195 | if (def_sym->visible != no) | |
196 | return def_sym; | |
197 | } | |
198 | ||
199 | /* just get the first visible value */ | |
200 | prop = sym_get_choice_prop(sym); | |
201 | for (e = prop->expr; e; e = e->left.expr) { | |
202 | def_sym = e->right.sym; | |
203 | sym_calc_visibility(def_sym); | |
204 | if (def_sym->visible != no) | |
205 | return def_sym; | |
206 | } | |
207 | ||
208 | /* no choice? reset tristate value */ | |
209 | sym->curr.tri = no; | |
210 | return NULL; | |
211 | } | |
212 | ||
213 | void sym_calc_value(struct symbol *sym) | |
214 | { | |
215 | struct symbol_value newval, oldval; | |
216 | struct property *prop; | |
217 | struct expr *e; | |
218 | ||
219 | if (!sym) | |
220 | return; | |
221 | ||
222 | if (sym->flags & SYMBOL_VALID) | |
223 | return; | |
224 | sym->flags |= SYMBOL_VALID; | |
225 | ||
226 | oldval = sym->curr; | |
227 | ||
228 | switch (sym->type) { | |
229 | case S_INT: | |
230 | case S_HEX: | |
231 | case S_STRING: | |
232 | newval = symbol_empty.curr; | |
233 | break; | |
234 | case S_BOOLEAN: | |
235 | case S_TRISTATE: | |
236 | newval = symbol_no.curr; | |
237 | break; | |
238 | default: | |
239 | sym->curr.val = sym->name; | |
240 | sym->curr.tri = no; | |
241 | return; | |
242 | } | |
243 | if (!sym_is_choice_value(sym)) | |
244 | sym->flags &= ~SYMBOL_WRITE; | |
245 | ||
246 | sym_calc_visibility(sym); | |
247 | ||
248 | /* set default if recursively called */ | |
249 | sym->curr = newval; | |
250 | ||
251 | switch (sym_get_type(sym)) { | |
252 | case S_BOOLEAN: | |
253 | case S_TRISTATE: | |
254 | if (sym_is_choice_value(sym) && sym->visible == yes) { | |
255 | prop = sym_get_choice_prop(sym); | |
256 | newval.tri = (prop_get_symbol(prop)->curr.val == sym) ? yes : no; | |
257 | } else if (E_OR(sym->visible, sym->rev_dep.tri) != no) { | |
258 | sym->flags |= SYMBOL_WRITE; | |
259 | if (sym_has_value(sym)) | |
260 | newval.tri = sym->user.tri; | |
261 | else if (!sym_is_choice(sym)) { | |
262 | prop = sym_get_default_prop(sym); | |
263 | if (prop) | |
264 | newval.tri = expr_calc_value(prop->expr); | |
265 | } | |
266 | newval.tri = E_OR(E_AND(newval.tri, sym->visible), sym->rev_dep.tri); | |
267 | } else if (!sym_is_choice(sym)) { | |
268 | prop = sym_get_default_prop(sym); | |
269 | if (prop) { | |
270 | sym->flags |= SYMBOL_WRITE; | |
271 | newval.tri = expr_calc_value(prop->expr); | |
272 | } | |
273 | } | |
274 | if (newval.tri == mod && sym_get_type(sym) == S_BOOLEAN) | |
275 | newval.tri = yes; | |
276 | break; | |
277 | case S_STRING: | |
278 | case S_HEX: | |
279 | case S_INT: | |
280 | if (sym->visible != no) { | |
281 | sym->flags |= SYMBOL_WRITE; | |
282 | if (sym_has_value(sym)) { | |
283 | newval.val = sym->user.val; | |
284 | break; | |
285 | } | |
286 | } | |
287 | prop = sym_get_default_prop(sym); | |
288 | if (prop) { | |
289 | struct symbol *ds = prop_get_symbol(prop); | |
290 | if (ds) { | |
291 | sym->flags |= SYMBOL_WRITE; | |
292 | sym_calc_value(ds); | |
293 | newval.val = ds->curr.val; | |
294 | } | |
295 | } | |
296 | break; | |
297 | default: | |
298 | ; | |
299 | } | |
300 | ||
301 | sym->curr = newval; | |
302 | if (sym_is_choice(sym) && newval.tri == yes) | |
303 | sym->curr.val = sym_calc_choice(sym); | |
304 | ||
305 | if (memcmp(&oldval, &sym->curr, sizeof(oldval))) | |
306 | sym_set_changed(sym); | |
307 | if (modules_sym == sym) | |
308 | modules_val = modules_sym->curr.tri; | |
309 | ||
310 | if (sym_is_choice(sym)) { | |
311 | int flags = sym->flags & (SYMBOL_CHANGED | SYMBOL_WRITE); | |
312 | prop = sym_get_choice_prop(sym); | |
313 | for (e = prop->expr; e; e = e->left.expr) { | |
314 | e->right.sym->flags |= flags; | |
315 | if (flags & SYMBOL_CHANGED) | |
316 | sym_set_changed(e->right.sym); | |
317 | } | |
318 | } | |
319 | } | |
320 | ||
321 | void sym_clear_all_valid(void) | |
322 | { | |
323 | struct symbol *sym; | |
324 | int i; | |
325 | ||
326 | for_all_symbols(i, sym) | |
327 | sym->flags &= ~SYMBOL_VALID; | |
328 | sym_change_count++; | |
329 | if (modules_sym) | |
330 | sym_calc_value(modules_sym); | |
331 | } | |
332 | ||
333 | void sym_set_changed(struct symbol *sym) | |
334 | { | |
335 | struct property *prop; | |
336 | ||
337 | sym->flags |= SYMBOL_CHANGED; | |
338 | for (prop = sym->prop; prop; prop = prop->next) { | |
339 | if (prop->menu) | |
340 | prop->menu->flags |= MENU_CHANGED; | |
341 | } | |
342 | } | |
343 | ||
344 | void sym_set_all_changed(void) | |
345 | { | |
346 | struct symbol *sym; | |
347 | int i; | |
348 | ||
349 | for_all_symbols(i, sym) | |
350 | sym_set_changed(sym); | |
351 | } | |
352 | ||
353 | bool sym_tristate_within_range(struct symbol *sym, tristate val) | |
354 | { | |
355 | int type = sym_get_type(sym); | |
356 | ||
357 | if (sym->visible == no) | |
358 | return false; | |
359 | ||
360 | if (type != S_BOOLEAN && type != S_TRISTATE) | |
361 | return false; | |
362 | ||
363 | if (type == S_BOOLEAN && val == mod) | |
364 | return false; | |
365 | if (sym->visible <= sym->rev_dep.tri) | |
366 | return false; | |
367 | if (sym_is_choice_value(sym) && sym->visible == yes) | |
368 | return val == yes; | |
369 | return val >= sym->rev_dep.tri && val <= sym->visible; | |
370 | } | |
371 | ||
372 | bool sym_set_tristate_value(struct symbol *sym, tristate val) | |
373 | { | |
374 | tristate oldval = sym_get_tristate_value(sym); | |
375 | ||
376 | if (oldval != val && !sym_tristate_within_range(sym, val)) | |
377 | return false; | |
378 | ||
379 | if (sym->flags & SYMBOL_NEW) { | |
380 | sym->flags &= ~SYMBOL_NEW; | |
381 | sym_set_changed(sym); | |
382 | } | |
383 | if (sym_is_choice_value(sym) && val == yes) { | |
384 | struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym)); | |
385 | ||
386 | cs->user.val = sym; | |
387 | cs->flags &= ~SYMBOL_NEW; | |
388 | } | |
389 | ||
390 | sym->user.tri = val; | |
391 | if (oldval != val) { | |
392 | sym_clear_all_valid(); | |
393 | if (sym == modules_sym) | |
394 | sym_set_all_changed(); | |
395 | } | |
396 | ||
397 | return true; | |
398 | } | |
399 | ||
400 | tristate sym_toggle_tristate_value(struct symbol *sym) | |
401 | { | |
402 | tristate oldval, newval; | |
403 | ||
404 | oldval = newval = sym_get_tristate_value(sym); | |
405 | do { | |
406 | switch (newval) { | |
407 | case no: | |
408 | newval = mod; | |
409 | break; | |
410 | case mod: | |
411 | newval = yes; | |
412 | break; | |
413 | case yes: | |
414 | newval = no; | |
415 | break; | |
416 | } | |
417 | if (sym_set_tristate_value(sym, newval)) | |
418 | break; | |
419 | } while (oldval != newval); | |
420 | return newval; | |
421 | } | |
422 | ||
423 | bool sym_string_valid(struct symbol *sym, const char *str) | |
424 | { | |
425 | signed char ch; | |
426 | ||
427 | switch (sym->type) { | |
428 | case S_STRING: | |
429 | return true; | |
430 | case S_INT: | |
431 | ch = *str++; | |
432 | if (ch == '-') | |
433 | ch = *str++; | |
434 | if (!isdigit(ch)) | |
435 | return false; | |
436 | if (ch == '0' && *str != 0) | |
437 | return false; | |
438 | while ((ch = *str++)) { | |
439 | if (!isdigit(ch)) | |
440 | return false; | |
441 | } | |
442 | return true; | |
443 | case S_HEX: | |
444 | if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X')) | |
445 | str += 2; | |
446 | ch = *str++; | |
447 | do { | |
448 | if (!isxdigit(ch)) | |
449 | return false; | |
450 | } while ((ch = *str++)); | |
451 | return true; | |
452 | case S_BOOLEAN: | |
453 | case S_TRISTATE: | |
454 | switch (str[0]) { | |
455 | case 'y': case 'Y': | |
456 | case 'm': case 'M': | |
457 | case 'n': case 'N': | |
458 | return true; | |
459 | } | |
460 | return false; | |
461 | default: | |
462 | return false; | |
463 | } | |
464 | } | |
465 | ||
466 | bool sym_string_within_range(struct symbol *sym, const char *str) | |
467 | { | |
468 | struct property *prop; | |
469 | int val; | |
470 | ||
471 | switch (sym->type) { | |
472 | case S_STRING: | |
473 | return sym_string_valid(sym, str); | |
474 | case S_INT: | |
475 | if (!sym_string_valid(sym, str)) | |
476 | return false; | |
477 | prop = sym_get_range_prop(sym); | |
478 | if (!prop) | |
479 | return true; | |
480 | val = strtol(str, NULL, 10); | |
481 | return val >= strtol(prop->expr->left.sym->name, NULL, 10) && | |
482 | val <= strtol(prop->expr->right.sym->name, NULL, 10); | |
483 | case S_HEX: | |
484 | if (!sym_string_valid(sym, str)) | |
485 | return false; | |
486 | prop = sym_get_range_prop(sym); | |
487 | if (!prop) | |
488 | return true; | |
489 | val = strtol(str, NULL, 16); | |
490 | return val >= strtol(prop->expr->left.sym->name, NULL, 16) && | |
491 | val <= strtol(prop->expr->right.sym->name, NULL, 16); | |
492 | case S_BOOLEAN: | |
493 | case S_TRISTATE: | |
494 | switch (str[0]) { | |
495 | case 'y': case 'Y': | |
496 | return sym_tristate_within_range(sym, yes); | |
497 | case 'm': case 'M': | |
498 | return sym_tristate_within_range(sym, mod); | |
499 | case 'n': case 'N': | |
500 | return sym_tristate_within_range(sym, no); | |
501 | } | |
502 | return false; | |
503 | default: | |
504 | return false; | |
505 | } | |
506 | } | |
507 | ||
508 | bool sym_set_string_value(struct symbol *sym, const char *newval) | |
509 | { | |
510 | const char *oldval; | |
511 | char *val; | |
512 | int size; | |
513 | ||
514 | switch (sym->type) { | |
515 | case S_BOOLEAN: | |
516 | case S_TRISTATE: | |
517 | switch (newval[0]) { | |
518 | case 'y': case 'Y': | |
519 | return sym_set_tristate_value(sym, yes); | |
520 | case 'm': case 'M': | |
521 | return sym_set_tristate_value(sym, mod); | |
522 | case 'n': case 'N': | |
523 | return sym_set_tristate_value(sym, no); | |
524 | } | |
525 | return false; | |
526 | default: | |
527 | ; | |
528 | } | |
529 | ||
530 | if (!sym_string_within_range(sym, newval)) | |
531 | return false; | |
532 | ||
533 | if (sym->flags & SYMBOL_NEW) { | |
534 | sym->flags &= ~SYMBOL_NEW; | |
535 | sym_set_changed(sym); | |
536 | } | |
537 | ||
538 | oldval = sym->user.val; | |
539 | size = strlen(newval) + 1; | |
540 | if (sym->type == S_HEX && (newval[0] != '0' || (newval[1] != 'x' && newval[1] != 'X'))) { | |
541 | size += 2; | |
542 | sym->user.val = val = malloc(size); | |
543 | *val++ = '0'; | |
544 | *val++ = 'x'; | |
545 | } else if (!oldval || strcmp(oldval, newval)) | |
546 | sym->user.val = val = malloc(size); | |
547 | else | |
548 | return true; | |
549 | ||
550 | strcpy(val, newval); | |
551 | free((void *)oldval); | |
552 | sym_clear_all_valid(); | |
553 | ||
554 | return true; | |
555 | } | |
556 | ||
557 | const char *sym_get_string_value(struct symbol *sym) | |
558 | { | |
559 | tristate val; | |
560 | ||
561 | switch (sym->type) { | |
562 | case S_BOOLEAN: | |
563 | case S_TRISTATE: | |
564 | val = sym_get_tristate_value(sym); | |
565 | switch (val) { | |
566 | case no: | |
567 | return "n"; | |
568 | case mod: | |
569 | return "m"; | |
570 | case yes: | |
571 | return "y"; | |
572 | } | |
573 | break; | |
574 | default: | |
575 | ; | |
576 | } | |
577 | return (const char *)sym->curr.val; | |
578 | } | |
579 | ||
580 | bool sym_is_changable(struct symbol *sym) | |
581 | { | |
582 | return sym->visible > sym->rev_dep.tri; | |
583 | } | |
584 | ||
585 | struct symbol *sym_lookup(const char *name, int isconst) | |
586 | { | |
587 | struct symbol *symbol; | |
588 | const char *ptr; | |
589 | char *new_name; | |
590 | int hash = 0; | |
591 | ||
592 | if (name) { | |
593 | if (name[0] && !name[1]) { | |
594 | switch (name[0]) { | |
595 | case 'y': return &symbol_yes; | |
596 | case 'm': return &symbol_mod; | |
597 | case 'n': return &symbol_no; | |
598 | } | |
599 | } | |
600 | for (ptr = name; *ptr; ptr++) | |
601 | hash += *ptr; | |
602 | hash &= 0xff; | |
603 | ||
604 | for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) { | |
605 | if (!strcmp(symbol->name, name)) { | |
606 | if ((isconst && symbol->flags & SYMBOL_CONST) || | |
607 | (!isconst && !(symbol->flags & SYMBOL_CONST))) | |
608 | return symbol; | |
609 | } | |
610 | } | |
611 | new_name = strdup(name); | |
612 | } else { | |
613 | new_name = NULL; | |
614 | hash = 256; | |
615 | } | |
616 | ||
617 | symbol = malloc(sizeof(*symbol)); | |
618 | memset(symbol, 0, sizeof(*symbol)); | |
619 | symbol->name = new_name; | |
620 | symbol->type = S_UNKNOWN; | |
621 | symbol->flags = SYMBOL_NEW; | |
622 | if (isconst) | |
623 | symbol->flags |= SYMBOL_CONST; | |
624 | ||
625 | symbol->next = symbol_hash[hash]; | |
626 | symbol_hash[hash] = symbol; | |
627 | ||
628 | return symbol; | |
629 | } | |
630 | ||
631 | struct symbol *sym_find(const char *name) | |
632 | { | |
633 | struct symbol *symbol = NULL; | |
634 | const char *ptr; | |
635 | int hash = 0; | |
636 | ||
637 | if (!name) | |
638 | return NULL; | |
639 | ||
640 | if (name[0] && !name[1]) { | |
641 | switch (name[0]) { | |
642 | case 'y': return &symbol_yes; | |
643 | case 'm': return &symbol_mod; | |
644 | case 'n': return &symbol_no; | |
645 | } | |
646 | } | |
647 | for (ptr = name; *ptr; ptr++) | |
648 | hash += *ptr; | |
649 | hash &= 0xff; | |
650 | ||
651 | for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) { | |
652 | if (!strcmp(symbol->name, name) && | |
653 | !(symbol->flags & SYMBOL_CONST)) | |
654 | break; | |
655 | } | |
656 | ||
657 | return symbol; | |
658 | } | |
659 | ||
660 | struct symbol **sym_re_search(const char *pattern) | |
661 | { | |
662 | struct symbol *sym, **sym_arr = NULL; | |
663 | int i, cnt, size; | |
664 | regex_t re; | |
665 | ||
666 | cnt = size = 0; | |
667 | /* Skip if empty */ | |
668 | if (strlen(pattern) == 0) | |
669 | return NULL; | |
670 | if (regcomp(&re, pattern, REG_EXTENDED|REG_NOSUB|REG_ICASE)) | |
671 | return NULL; | |
672 | ||
673 | for_all_symbols(i, sym) { | |
674 | if (sym->flags & SYMBOL_CONST || !sym->name) | |
675 | continue; | |
676 | if (regexec(&re, sym->name, 0, NULL, 0)) | |
677 | continue; | |
678 | if (cnt + 1 >= size) { | |
679 | void *tmp = sym_arr; | |
680 | size += 16; | |
681 | sym_arr = realloc(sym_arr, size * sizeof(struct symbol *)); | |
682 | if (!sym_arr) { | |
683 | free(tmp); | |
684 | return NULL; | |
685 | } | |
686 | } | |
687 | sym_arr[cnt++] = sym; | |
688 | } | |
689 | if (sym_arr) | |
690 | sym_arr[cnt] = NULL; | |
691 | regfree(&re); | |
692 | ||
693 | return sym_arr; | |
694 | } | |
695 | ||
696 | ||
697 | struct symbol *sym_check_deps(struct symbol *sym); | |
698 | ||
699 | static struct symbol *sym_check_expr_deps(struct expr *e) | |
700 | { | |
701 | struct symbol *sym; | |
702 | ||
703 | if (!e) | |
704 | return NULL; | |
705 | switch (e->type) { | |
706 | case E_OR: | |
707 | case E_AND: | |
708 | sym = sym_check_expr_deps(e->left.expr); | |
709 | if (sym) | |
710 | return sym; | |
711 | return sym_check_expr_deps(e->right.expr); | |
712 | case E_NOT: | |
713 | return sym_check_expr_deps(e->left.expr); | |
714 | case E_EQUAL: | |
715 | case E_UNEQUAL: | |
716 | sym = sym_check_deps(e->left.sym); | |
717 | if (sym) | |
718 | return sym; | |
719 | return sym_check_deps(e->right.sym); | |
720 | case E_SYMBOL: | |
721 | return sym_check_deps(e->left.sym); | |
722 | default: | |
723 | break; | |
724 | } | |
725 | printf("Oops! How to check %d?\n", e->type); | |
726 | return NULL; | |
727 | } | |
728 | ||
729 | struct symbol *sym_check_deps(struct symbol *sym) | |
730 | { | |
731 | struct symbol *sym2; | |
732 | struct property *prop; | |
733 | ||
734 | if (sym->flags & SYMBOL_CHECK_DONE) | |
735 | return NULL; | |
736 | if (sym->flags & SYMBOL_CHECK) { | |
737 | printf("Warning! Found recursive dependency: %s", sym->name); | |
738 | return sym; | |
739 | } | |
740 | ||
741 | sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED); | |
742 | sym2 = sym_check_expr_deps(sym->rev_dep.expr); | |
743 | if (sym2) | |
744 | goto out; | |
745 | ||
746 | for (prop = sym->prop; prop; prop = prop->next) { | |
747 | if (prop->type == P_CHOICE || prop->type == P_SELECT) | |
748 | continue; | |
749 | sym2 = sym_check_expr_deps(prop->visible.expr); | |
750 | if (sym2) | |
751 | goto out; | |
752 | if (prop->type != P_DEFAULT || sym_is_choice(sym)) | |
753 | continue; | |
754 | sym2 = sym_check_expr_deps(prop->expr); | |
755 | if (sym2) | |
756 | goto out; | |
757 | } | |
758 | out: | |
759 | if (sym2) | |
760 | printf(" %s", sym->name); | |
761 | sym->flags &= ~SYMBOL_CHECK; | |
762 | return sym2; | |
763 | } | |
764 | ||
765 | struct property *prop_alloc(enum prop_type type, struct symbol *sym) | |
766 | { | |
767 | struct property *prop; | |
768 | struct property **propp; | |
769 | ||
770 | prop = malloc(sizeof(*prop)); | |
771 | memset(prop, 0, sizeof(*prop)); | |
772 | prop->type = type; | |
773 | prop->sym = sym; | |
774 | prop->file = current_file; | |
775 | prop->lineno = zconf_lineno(); | |
776 | ||
777 | /* append property to the prop list of symbol */ | |
778 | if (sym) { | |
779 | for (propp = &sym->prop; *propp; propp = &(*propp)->next) | |
780 | ; | |
781 | *propp = prop; | |
782 | } | |
783 | ||
784 | return prop; | |
785 | } | |
786 | ||
787 | struct symbol *prop_get_symbol(struct property *prop) | |
788 | { | |
789 | if (prop->expr && (prop->expr->type == E_SYMBOL || | |
790 | prop->expr->type == E_CHOICE)) | |
791 | return prop->expr->left.sym; | |
792 | return NULL; | |
793 | } | |
794 | ||
795 | const char *prop_get_type_name(enum prop_type type) | |
796 | { | |
797 | switch (type) { | |
798 | case P_PROMPT: | |
799 | return "prompt"; | |
800 | case P_COMMENT: | |
801 | return "comment"; | |
802 | case P_MENU: | |
803 | return "menu"; | |
804 | case P_DEFAULT: | |
805 | return "default"; | |
806 | case P_CHOICE: | |
807 | return "choice"; | |
808 | case P_SELECT: | |
809 | return "select"; | |
810 | case P_RANGE: | |
811 | return "range"; | |
812 | case P_UNKNOWN: | |
813 | break; | |
814 | } | |
815 | return "unknown"; | |
816 | } |