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#include <ctype.h>
00007
#include <stdlib.h>
00008
#include <string.h>
00009
#include <sys/utsname.h>
00010
00011 #define LKC_DIRECT_LINK
00012
#include "lkc.h"
00013
00014 struct symbol symbol_yes = {
00015 .
name =
"y",
00016 .curr = {
"y",
yes },
00017 .flags =
SYMBOL_YES|
SYMBOL_VALID,
00018 },
symbol_mod = {
00019 .
name =
"m",
00020 .curr = {
"m",
mod },
00021 .flags =
SYMBOL_MOD|
SYMBOL_VALID,
00022 }, symbol_no = {
00023 .name =
"n",
00024 .curr = {
"n",
no },
00025 .flags =
SYMBOL_NO|
SYMBOL_VALID,
00026 }, symbol_empty = {
00027 .name =
"",
00028 .curr = {
"",
no },
00029 .flags =
SYMBOL_VALID,
00030 };
00031
00032 int sym_change_count;
00033 struct symbol *
modules_sym;
00034
00035 void sym_add_default(
struct symbol *sym,
const char *def)
00036 {
00037
struct property *prop =
prop_alloc(
P_DEFAULT, sym);
00038
00039 prop->expr =
expr_alloc_symbol(
sym_lookup(def, 1));
00040 }
00041
00042 void sym_init(
void)
00043 {
00044
struct symbol *sym;
00045
struct utsname uts;
00046
char *p;
00047
static bool inited =
false;
00048
00049
if (inited)
00050
return;
00051 inited =
true;
00052
00053 uname(&uts);
00054
00055 sym =
sym_lookup(
"ARCH", 0);
00056 sym->type =
S_STRING;
00057 sym->flags |=
SYMBOL_AUTO;
00058 p = getenv(
"ARCH");
00059
if (p)
00060
sym_add_default(sym, p);
00061
00062 sym =
sym_lookup(
"KERNELRELEASE", 0);
00063 sym->type =
S_STRING;
00064 sym->flags |=
SYMBOL_AUTO;
00065 p = getenv(
"KERNELRELEASE");
00066
if (p)
00067
sym_add_default(sym, p);
00068
00069 sym =
sym_lookup(
"UNAME_RELEASE", 0);
00070 sym->type =
S_STRING;
00071 sym->flags |=
SYMBOL_AUTO;
00072
sym_add_default(sym, uts.release);
00073 }
00074
00075 enum symbol_type sym_get_type(
struct symbol *sym)
00076 {
00077
enum symbol_type type = sym->
type;
00078
00079
if (type ==
S_TRISTATE) {
00080
if (
sym_is_choice_value(sym) && sym->
visible ==
yes)
00081 type =
S_BOOLEAN;
00082
else {
00083
sym_calc_value(
modules_sym);
00084
if (
modules_sym->curr.tri ==
no)
00085 type =
S_BOOLEAN;
00086 }
00087 }
00088
return type;
00089 }
00090
00091 const char *
sym_type_name(
enum symbol_type type)
00092 {
00093
switch (type) {
00094
case S_BOOLEAN:
00095
return "boolean";
00096
case S_TRISTATE:
00097
return "tristate";
00098
case S_INT:
00099
return "integer";
00100
case S_HEX:
00101
return "hex";
00102
case S_STRING:
00103
return "string";
00104
case S_UNKNOWN:
00105
return "unknown";
00106
case S_OTHER:
00107
break;
00108 }
00109
return "???";
00110 }
00111
00112 struct property *
sym_get_choice_prop(
struct symbol *sym)
00113 {
00114
struct property *prop;
00115
00116
for_all_choices(sym, prop)
00117
return prop;
00118
return NULL;
00119 }
00120
00121 struct property *
sym_get_default_prop(
struct symbol *sym)
00122 {
00123
struct property *prop;
00124
00125
for_all_defaults(sym, prop) {
00126 prop->visible.tri =
expr_calc_value(prop->visible.expr);
00127
if (prop->visible.tri !=
no)
00128
return prop;
00129 }
00130
return NULL;
00131 }
00132
00133 struct property *
sym_get_range_prop(
struct symbol *sym)
00134 {
00135
struct property *prop;
00136
00137
for_all_properties(sym, prop,
P_RANGE) {
00138 prop->visible.tri =
expr_calc_value(prop->visible.expr);
00139
if (prop->visible.tri !=
no)
00140
return prop;
00141 }
00142
return NULL;
00143 }
00144
00145 static void sym_calc_visibility(
struct symbol *sym)
00146 {
00147
struct property *prop;
00148
tristate tri;
00149
00150
00151 tri =
no;
00152
for_all_prompts(sym, prop) {
00153 prop->visible.tri =
expr_calc_value(prop->visible.expr);
00154 tri =
E_OR(tri, prop->visible.tri);
00155 }
00156
if (sym->
visible != tri) {
00157 sym->
visible = tri;
00158
sym_set_changed(sym);
00159 }
00160
if (
sym_is_choice_value(sym))
00161
return;
00162 tri =
no;
00163
if (sym->
rev_dep.
expr)
00164 tri =
expr_calc_value(sym->
rev_dep.
expr);
00165
if (sym->
rev_dep.
tri != tri) {
00166 sym->
rev_dep.
tri = tri;
00167
sym_set_changed(sym);
00168 }
00169 }
00170
00171 static struct symbol *
sym_calc_choice(
struct symbol *sym)
00172 {
00173
struct symbol *def_sym;
00174
struct property *prop;
00175
struct expr *e;
00176
00177
00178 def_sym = sym->
user.
val;
00179
if (def_sym) {
00180
sym_calc_visibility(def_sym);
00181
if (def_sym->visible !=
no)
00182
return def_sym;
00183 }
00184
00185
00186
for_all_defaults(sym, prop) {
00187 prop->visible.tri =
expr_calc_value(prop->visible.expr);
00188
if (prop->visible.tri ==
no)
00189
continue;
00190 def_sym =
prop_get_symbol(prop);
00191
sym_calc_visibility(def_sym);
00192
if (def_sym->visible !=
no)
00193
return def_sym;
00194 }
00195
00196
00197 prop =
sym_get_choice_prop(sym);
00198
for (e = prop->expr; e; e = e->left.expr) {
00199 def_sym = e->right.sym;
00200
sym_calc_visibility(def_sym);
00201
if (def_sym->visible !=
no)
00202
return def_sym;
00203 }
00204
00205
00206 sym->curr.tri =
no;
00207
return NULL;
00208 }
00209
00210 void sym_calc_value(
struct symbol *sym)
00211 {
00212
struct symbol_value newval, oldval;
00213
struct property *prop;
00214
struct expr *e;
00215
00216
if (!sym)
00217
return;
00218
00219
if (sym->
flags &
SYMBOL_VALID)
00220
return;
00221 sym->
flags |=
SYMBOL_VALID;
00222
00223 oldval = sym->curr;
00224
00225
switch (sym->
type) {
00226
case S_INT:
00227
case S_HEX:
00228
case S_STRING:
00229 newval = symbol_empty.curr;
00230
break;
00231
case S_BOOLEAN:
00232
case S_TRISTATE:
00233 newval = symbol_no.curr;
00234
break;
00235
default:
00236 sym->curr.val = sym->
name;
00237 sym->curr.tri =
no;
00238
return;
00239 }
00240
if (!
sym_is_choice_value(sym))
00241 sym->
flags &= ~
SYMBOL_WRITE;
00242
00243
sym_calc_visibility(sym);
00244
00245
00246 sym->curr = newval;
00247
00248
switch (
sym_get_type(sym)) {
00249
case S_BOOLEAN:
00250
case S_TRISTATE:
00251
if (
sym_is_choice_value(sym) && sym->
visible ==
yes) {
00252 prop =
sym_get_choice_prop(sym);
00253 newval.
tri = (
prop_get_symbol(prop)->curr.val == sym) ?
yes :
no;
00254 }
else if (
E_OR(sym->
visible, sym->
rev_dep.
tri) !=
no) {
00255 sym->
flags |=
SYMBOL_WRITE;
00256
if (
sym_has_value(sym))
00257 newval.
tri = sym->
user.
tri;
00258
else if (!
sym_is_choice(sym)) {
00259 prop =
sym_get_default_prop(sym);
00260
if (prop)
00261 newval.
tri =
expr_calc_value(prop->expr);
00262 }
00263 newval.
tri =
E_OR(
E_AND(newval.
tri, sym->
visible), sym->
rev_dep.
tri);
00264 }
else if (!
sym_is_choice(sym)) {
00265 prop =
sym_get_default_prop(sym);
00266
if (prop) {
00267 sym->
flags |=
SYMBOL_WRITE;
00268 newval.
tri =
expr_calc_value(prop->expr);
00269 }
00270 }
00271
if (
sym_get_type(sym) ==
S_BOOLEAN) {
00272
if (newval.
tri ==
mod)
00273 newval.
tri =
yes;
00274
if (sym->
visible ==
mod)
00275 sym->
visible =
yes;
00276
if (sym->
rev_dep.
tri ==
mod)
00277 sym->
rev_dep.
tri =
yes;
00278 }
00279
break;
00280
case S_STRING:
00281
case S_HEX:
00282
case S_INT:
00283
if (sym->
visible !=
no) {
00284 sym->
flags |=
SYMBOL_WRITE;
00285
if (
sym_has_value(sym)) {
00286 newval.
val = sym->
user.
val;
00287
break;
00288 }
00289 }
00290 prop =
sym_get_default_prop(sym);
00291
if (prop) {
00292
struct symbol *ds =
prop_get_symbol(prop);
00293
if (ds) {
00294 sym->
flags |=
SYMBOL_WRITE;
00295
sym_calc_value(ds);
00296 newval.
val = ds->curr.val;
00297 }
00298 }
00299
break;
00300
default:
00301 ;
00302 }
00303
00304 sym->curr = newval;
00305
if (
sym_is_choice(sym) && newval.
tri ==
yes)
00306 sym->curr.val =
sym_calc_choice(sym);
00307
00308
if (memcmp(&oldval, &sym->curr,
sizeof(oldval)))
00309
sym_set_changed(sym);
00310
00311
if (
sym_is_choice(sym)) {
00312
int flags = sym->
flags & (
SYMBOL_CHANGED |
SYMBOL_WRITE);
00313 prop =
sym_get_choice_prop(sym);
00314
for (e = prop->expr; e; e = e->left.expr) {
00315 e->right.sym->flags |=
flags;
00316
if (
flags &
SYMBOL_CHANGED)
00317
sym_set_changed(e->right.sym);
00318 }
00319 }
00320 }
00321
00322 void sym_clear_all_valid(
void)
00323 {
00324
struct symbol *sym;
00325
int i;
00326
00327
for_all_symbols(i, sym)
00328 sym->flags &= ~
SYMBOL_VALID;
00329
sym_change_count++;
00330 }
00331
00332 void sym_set_changed(
struct symbol *sym)
00333 {
00334
struct property *prop;
00335
00336 sym->
flags |=
SYMBOL_CHANGED;
00337
for (prop = sym->
prop; prop; prop = prop->
next) {
00338
if (prop->menu)
00339 prop->menu->flags |=
MENU_CHANGED;
00340 }
00341 }
00342
00343 void sym_set_all_changed(
void)
00344 {
00345
struct symbol *sym;
00346
int i;
00347
00348
for_all_symbols(i, sym)
00349
sym_set_changed(sym);
00350 }
00351
00352 bool sym_tristate_within_range(
struct symbol *sym,
tristate val)
00353 {
00354
int type =
sym_get_type(sym);
00355
00356
if (sym->
visible ==
no)
00357
return false;
00358
00359
if (type !=
S_BOOLEAN && type !=
S_TRISTATE)
00360
return false;
00361
00362
if (type ==
S_BOOLEAN && val ==
mod)
00363
return false;
00364
if (sym->
visible <= sym->
rev_dep.
tri)
00365
return false;
00366
if (
sym_is_choice_value(sym) && sym->
visible ==
yes)
00367
return val ==
yes;
00368
return val >= sym->
rev_dep.
tri && val <= sym->
visible;
00369 }
00370
00371 bool sym_set_tristate_value(
struct symbol *sym,
tristate val)
00372 {
00373
tristate oldval =
sym_get_tristate_value(sym);
00374
00375
if (oldval != val && !
sym_tristate_within_range(sym, val))
00376
return false;
00377
00378
if (sym->
flags &
SYMBOL_NEW) {
00379 sym->
flags &= ~
SYMBOL_NEW;
00380
sym_set_changed(sym);
00381 }
00382
if (
sym_is_choice_value(sym) && val ==
yes) {
00383
struct symbol *cs =
prop_get_symbol(
sym_get_choice_prop(sym));
00384
00385 cs->user.val = sym;
00386 cs->
flags &= ~
SYMBOL_NEW;
00387 }
00388
00389 sym->
user.
tri = val;
00390
if (oldval != val) {
00391
sym_clear_all_valid();
00392
if (sym ==
modules_sym)
00393
sym_set_all_changed();
00394 }
00395
00396
return true;
00397 }
00398
00399 tristate sym_toggle_tristate_value(
struct symbol *sym)
00400 {
00401
tristate oldval, newval;
00402
00403 oldval = newval =
sym_get_tristate_value(sym);
00404
do {
00405
switch (newval) {
00406
case no:
00407 newval =
mod;
00408
break;
00409
case mod:
00410 newval =
yes;
00411
break;
00412
case yes:
00413 newval =
no;
00414
break;
00415 }
00416
if (
sym_set_tristate_value(sym, newval))
00417
break;
00418 }
while (oldval != newval);
00419
return newval;
00420 }
00421
00422 bool sym_string_valid(
struct symbol *sym,
const char *str)
00423 {
00424
char ch;
00425
00426
switch (sym->
type) {
00427
case S_STRING:
00428
return true;
00429
case S_INT:
00430 ch = *str++;
00431
if (ch ==
'-')
00432 ch = *str++;
00433
if (!isdigit(ch))
00434
return false;
00435
if (ch ==
'0' && *str != 0)
00436
return false;
00437
while ((ch = *str++)) {
00438
if (!isdigit(ch))
00439
return false;
00440 }
00441
return true;
00442
case S_HEX:
00443
if (str[0] ==
'0' && (str[1] ==
'x' || str[1] ==
'X'))
00444 str += 2;
00445 ch = *str++;
00446
do {
00447
if (!isxdigit(ch))
00448
return false;
00449 }
while ((ch = *str++));
00450
return true;
00451
case S_BOOLEAN:
00452
case S_TRISTATE:
00453
switch (str[0]) {
00454
case 'y':
case 'Y':
00455
case 'm':
case 'M':
00456
case 'n':
case 'N':
00457
return true;
00458 }
00459
return false;
00460
default:
00461
return false;
00462 }
00463 }
00464
00465 bool sym_string_within_range(
struct symbol *sym,
const char *str)
00466 {
00467
struct property *prop;
00468
int val;
00469
00470
switch (sym->
type) {
00471
case S_STRING:
00472
return sym_string_valid(sym, str);
00473
case S_INT:
00474
if (!
sym_string_valid(sym, str))
00475
return false;
00476 prop =
sym_get_range_prop(sym);
00477
if (!prop)
00478
return true;
00479 val = strtol(str, NULL, 10);
00480
return val >= strtol(prop->expr->left.sym->name, NULL, 10) &&
00481 val <= strtol(prop->expr->right.sym->name, NULL, 10);
00482
case S_HEX:
00483
if (!
sym_string_valid(sym, str))
00484
return false;
00485 prop =
sym_get_range_prop(sym);
00486
if (!prop)
00487
return true;
00488 val = strtol(str, NULL, 16);
00489
return val >= strtol(prop->expr->left.sym->name, NULL, 16) &&
00490 val <= strtol(prop->expr->right.sym->name, NULL, 16);
00491
case S_BOOLEAN:
00492
case S_TRISTATE:
00493
switch (str[0]) {
00494
case 'y':
case 'Y':
00495
return sym_tristate_within_range(sym,
yes);
00496
case 'm':
case 'M':
00497
return sym_tristate_within_range(sym,
mod);
00498
case 'n':
case 'N':
00499
return sym_tristate_within_range(sym,
no);
00500 }
00501
return false;
00502
default:
00503
return false;
00504 }
00505 }
00506
00507 bool sym_set_string_value(
struct symbol *sym,
const char *newval)
00508 {
00509
const char *oldval;
00510
char *val;
00511
int size;
00512
00513
switch (sym->
type) {
00514
case S_BOOLEAN:
00515
case S_TRISTATE:
00516
switch (newval[0]) {
00517
case 'y':
case 'Y':
00518
return sym_set_tristate_value(sym,
yes);
00519
case 'm':
case 'M':
00520
return sym_set_tristate_value(sym,
mod);
00521
case 'n':
case 'N':
00522
return sym_set_tristate_value(sym,
no);
00523 }
00524
return false;
00525
default:
00526 ;
00527 }
00528
00529
if (!
sym_string_within_range(sym, newval))
00530
return false;
00531
00532
if (sym->
flags &
SYMBOL_NEW) {
00533 sym->
flags &= ~
SYMBOL_NEW;
00534
sym_set_changed(sym);
00535 }
00536
00537 oldval = sym->
user.
val;
00538 size = strlen(newval) + 1;
00539
if (sym->
type ==
S_HEX && (newval[0] !=
'0' || (newval[1] !=
'x' && newval[1] !=
'X'))) {
00540 size += 2;
00541 sym->
user.
val = val = malloc(size);
00542 *val++ =
'0';
00543 *val++ =
'x';
00544 }
else if (!oldval || strcmp(oldval, newval))
00545 sym->
user.
val = val = malloc(size);
00546
else
00547
return true;
00548
00549 strcpy(val, newval);
00550 free((
void *)oldval);
00551
sym_clear_all_valid();
00552
00553
return true;
00554 }
00555
00556 const char *
sym_get_string_value(
struct symbol *sym)
00557 {
00558
tristate val;
00559
00560
switch (sym->
type) {
00561
case S_BOOLEAN:
00562
case S_TRISTATE:
00563 val =
sym_get_tristate_value(sym);
00564
switch (val) {
00565
case no:
00566
return "n";
00567
case mod:
00568
return "m";
00569
case yes:
00570
return "y";
00571 }
00572
break;
00573
default:
00574 ;
00575 }
00576
return (
const char *)sym->curr.val;
00577 }
00578
00579 bool sym_is_changable(
struct symbol *sym)
00580 {
00581
return sym->
visible > sym->
rev_dep.
tri;
00582 }
00583
00584 struct symbol *
sym_lookup(
const char *name,
int isconst)
00585 {
00586
struct symbol *
symbol;
00587
const char *ptr;
00588
char *new_name;
00589
int hash = 0;
00590
00591
if (name) {
00592
if (name[0] && !name[1]) {
00593
switch (name[0]) {
00594
case 'y':
return &
symbol_yes;
00595
case 'm':
return &
symbol_mod;
00596
case 'n':
return &symbol_no;
00597 }
00598 }
00599
for (ptr = name; *ptr; ptr++)
00600 hash += *ptr;
00601 hash &= 0xff;
00602
00603
for (
symbol =
symbol_hash[hash];
symbol;
symbol =
symbol->
next) {
00604
if (!strcmp(
symbol->name, name)) {
00605
if ((isconst &&
symbol->flags &
SYMBOL_CONST) ||
00606 (!isconst && !(
symbol->flags &
SYMBOL_CONST)))
00607
return symbol;
00608 }
00609 }
00610 new_name = strdup(name);
00611 }
else {
00612 new_name = NULL;
00613 hash = 256;
00614 }
00615
00616
symbol = malloc(
sizeof(*
symbol));
00617 memset(symbol, 0,
sizeof(*symbol));
00618 symbol->name = new_name;
00619 symbol->type =
S_UNKNOWN;
00620 symbol->flags =
SYMBOL_NEW;
00621
if (isconst)
00622 symbol->flags |=
SYMBOL_CONST;
00623
00624 symbol->next =
symbol_hash[hash];
00625
symbol_hash[hash] = symbol;
00626
00627
return symbol;
00628 }
00629
00630 struct symbol *
sym_find(
const char *name)
00631 {
00632
struct symbol *
symbol = NULL;
00633
const char *ptr;
00634
int hash = 0;
00635
00636
if (!name)
00637
return NULL;
00638
00639
if (name[0] && !name[1]) {
00640
switch (name[0]) {
00641
case 'y':
return &
symbol_yes;
00642
case 'm':
return &
symbol_mod;
00643
case 'n':
return &symbol_no;
00644 }
00645 }
00646
for (ptr = name; *ptr; ptr++)
00647 hash += *ptr;
00648 hash &= 0xff;
00649
00650
for (
symbol =
symbol_hash[hash];
symbol;
symbol =
symbol->
next) {
00651
if (!strcmp(
symbol->name, name) &&
00652 !(
symbol->flags &
SYMBOL_CONST))
00653
break;
00654 }
00655
00656
return symbol;
00657 }
00658
00659
struct symbol *
sym_check_deps(
struct symbol *sym);
00660
00661 static struct symbol *
sym_check_expr_deps(
struct expr *e)
00662 {
00663
struct symbol *sym;
00664
00665
if (!e)
00666
return NULL;
00667
switch (e->
type) {
00668
case E_OR:
00669
case E_AND:
00670 sym =
sym_check_expr_deps(e->left.expr);
00671
if (sym)
00672
return sym;
00673
return sym_check_expr_deps(e->
right.
expr);
00674
case E_NOT:
00675
return sym_check_expr_deps(e->left.expr);
00676
case E_EQUAL:
00677
case E_UNEQUAL:
00678 sym =
sym_check_deps(e->left.sym);
00679
if (sym)
00680
return sym;
00681
return sym_check_deps(e->
right.
sym);
00682
case E_SYMBOL:
00683
return sym_check_deps(e->left.sym);
00684
default:
00685
break;
00686 }
00687 printf(
"Oops! How to check %d?\n", e->
type);
00688
return NULL;
00689 }
00690
00691 struct symbol *
sym_check_deps(
struct symbol *sym)
00692 {
00693
struct symbol *sym2;
00694
struct property *prop;
00695
00696
if (sym->
flags &
SYMBOL_CHECK_DONE)
00697
return NULL;
00698
if (sym->
flags &
SYMBOL_CHECK) {
00699 printf(
"Warning! Found recursive dependency: %s", sym->
name);
00700
return sym;
00701 }
00702
00703 sym->
flags |= (
SYMBOL_CHECK |
SYMBOL_CHECKED);
00704 sym2 =
sym_check_expr_deps(sym->
rev_dep.
expr);
00705
if (sym2)
00706
goto out;
00707
00708
for (prop = sym->
prop; prop; prop = prop->
next) {
00709
if (prop->type ==
P_CHOICE)
00710
continue;
00711 sym2 =
sym_check_expr_deps(prop->visible.expr);
00712
if (sym2)
00713
goto out;
00714
if (prop->type !=
P_DEFAULT ||
sym_is_choice(sym))
00715
continue;
00716 sym2 =
sym_check_expr_deps(prop->expr);
00717
if (sym2)
00718
goto out;
00719 }
00720
out:
00721
if (sym2)
00722 printf(
" %s", sym->
name);
00723 sym->
flags &= ~
SYMBOL_CHECK;
00724
return sym2;
00725 }
00726
00727 struct property *
prop_alloc(
enum prop_type type,
struct symbol *sym)
00728 {
00729
struct property *prop;
00730
struct property **propp;
00731
00732 prop = malloc(
sizeof(*prop));
00733 memset(prop, 0,
sizeof(*prop));
00734 prop->type = type;
00735 prop->sym = sym;
00736 prop->file =
current_file;
00737 prop->
lineno =
zconf_lineno();
00738
00739
00740
if (sym) {
00741
for (propp = &sym->
prop; *propp; propp = &(*propp)->
next)
00742 ;
00743 *propp = prop;
00744 }
00745
00746
return prop;
00747 }
00748
00749 struct symbol *
prop_get_symbol(
struct property *prop)
00750 {
00751
if (prop->
expr && (prop->
expr->
type ==
E_SYMBOL ||
00752 prop->
expr->
type ==
E_CHOICE))
00753
return prop->
expr->left.sym;
00754
return NULL;
00755 }
00756
00757 const char *
prop_get_type_name(
enum prop_type type)
00758 {
00759
switch (type) {
00760
case P_PROMPT:
00761
return "prompt";
00762
case P_COMMENT:
00763
return "comment";
00764
case P_MENU:
00765
return "menu";
00766
case P_DEFAULT:
00767
return "default";
00768
case P_CHOICE:
00769
return "choice";
00770
case P_SELECT:
00771
return "select";
00772
case P_RANGE:
00773
return "range";
00774
case P_UNKNOWN:
00775
break;
00776 }
00777
return "unknown";
00778 }