-
Notifications
You must be signed in to change notification settings - Fork 1.1k
/
Copy pathCFTimeZone.c
1696 lines (1520 loc) · 60.9 KB
/
CFTimeZone.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* CFTimeZone.c
Copyright (c) 1998-2019, Apple Inc. and the Swift project authors
Portions Copyright (c) 2014-2019, Apple Inc. and the Swift project authors
Licensed under Apache License v2.0 with Runtime Library Exception
See http://swift.org/LICENSE.txt for license information
See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
Responsibility: Itai Ferber
*/
#include "CFTimeZone.h"
#include "CFPropertyList.h"
#include "CFDateFormatter.h"
#include "CFPriv.h"
#include "CFInternal.h"
#include "CFRuntime_Internal.h"
#include <math.h>
#include <limits.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <_foundation_unicode/ucal.h>
#include <_foundation_unicode/udat.h>
#include <_foundation_unicode/ustring.h>
#include "CFDateFormatter.h"
#if TARGET_OS_MAC || TARGET_OS_LINUX || TARGET_OS_BSD || TARGET_OS_WASI
#include <dirent.h>
#include <unistd.h>
#if !TARGET_OS_ANDROID && !TARGET_OS_WASI
#include <sys/fcntl.h>
#elif TARGET_OS_WASI
#include <fcntl.h>
#else
#include <sys/endian.h>
#endif
#endif
#if TARGET_OS_WIN32
#include <tchar.h>
#include "CFTimeZone_WindowsMapping.h"
#define NOMINMAX
#define WIN32_LEAN_AND_MEAN
#include "Windows.h"
#endif
#if TARGET_OS_MAC
#include <tzfile.h>
#define MACOS_TZDIR1 "/usr/share/zoneinfo/" // 10.12 and earlier
#define MACOS_TZDIR2 "/var/db/timezone/zoneinfo/" // 10.13 onwards
#elif TARGET_OS_LINUX || TARGET_OS_BSD || TARGET_OS_WASI
#ifndef TZDIR
#define TZDIR "/usr/share/zoneinfo/" /* Time zone object file directory */
#endif /* !defined TZDIR */
#ifndef TZDEFAULT
#define TZDEFAULT "/etc/localtime"
#endif /* !defined TZDEFAULT */
#endif
#if TARGET_OS_LINUX || TARGET_OS_BSD || TARGET_OS_WIN32 || TARGET_OS_WASI
struct tzhead {
char tzh_magic[4]; /* TZ_MAGIC */
char tzh_reserved[16]; /* reserved for future use */
char tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */
char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
char tzh_leapcnt[4]; /* coded number of leap seconds */
char tzh_timecnt[4]; /* coded number of transition times */
char tzh_typecnt[4]; /* coded number of local time types */
char tzh_charcnt[4]; /* coded number of abbr. chars */
};
#endif
#include <time.h>
#if !TARGET_OS_WIN32 && !TARGET_OS_ANDROID
static CFStringRef __tzZoneInfo = NULL;
static char *__tzDir = NULL;
static void __InitTZStrings(void);
#endif
CONST_STRING_DECL(kCFTimeZoneSystemTimeZoneDidChangeNotification, "kCFTimeZoneSystemTimeZoneDidChangeNotification")
static CFTimeZoneRef __CFTimeZoneSystem = NULL;
static CFTimeZoneRef __CFTimeZoneDefault = NULL;
static CFDictionaryRef __CFTimeZoneAbbreviationDict = NULL;
static CFLock_t __CFTimeZoneAbbreviationLock = CFLockInit;
static CFMutableDictionaryRef __CFTimeZoneCompatibilityMappingDict = NULL;
static CFLock_t __CFTimeZoneCompatibilityMappingLock = CFLockInit;
static CFArrayRef __CFKnownTimeZoneList = NULL;
static CFMutableDictionaryRef __CFTimeZoneCache = NULL;
static CFLock_t __CFTimeZoneGlobalLock = CFLockInit;
CF_INLINE void __CFTimeZoneLockGlobal(void) {
__CFLock(&__CFTimeZoneGlobalLock);
}
CF_INLINE void __CFTimeZoneUnlockGlobal(void) {
__CFUnlock(&__CFTimeZoneGlobalLock);
}
CF_INLINE void __CFTimeZoneLockAbbreviations(void) {
__CFLock(&__CFTimeZoneAbbreviationLock);
}
CF_INLINE void __CFTimeZoneUnlockAbbreviations(void) {
__CFUnlock(&__CFTimeZoneAbbreviationLock);
}
CF_INLINE void __CFTimeZoneLockCompatibilityMapping(void) {
__CFLock(&__CFTimeZoneCompatibilityMappingLock);
}
CF_INLINE void __CFTimeZoneUnlockCompatibilityMapping(void) {
__CFUnlock(&__CFTimeZoneCompatibilityMappingLock);
}
#define COUNT_OF(array) (sizeof((array)) / sizeof((array)[0]))
#if TARGET_OS_WIN32
#define CF_TIME_ZONES_KEY L"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Time Zones"
/* This function should be used for WIN32 instead of
* __CFCopyRecursiveDirectoryList function.
* It takes TimeZone names from the registry
* (Aleksey Dukhnyakov)
*/
static CFMutableArrayRef __CFCopyWindowsTimeZoneList() {
CFMutableArrayRef result = NULL;
HKEY hkResult;
WCHAR szName[MAX_PATH + 1];
DWORD dwIndex, retCode;
if (RegOpenKeyW(HKEY_LOCAL_MACHINE, CF_TIME_ZONES_KEY, &hkResult) != ERROR_SUCCESS)
return NULL;
result = CFArrayCreateMutable(kCFAllocatorSystemDefault, 0, &kCFTypeArrayCallBacks);
for (dwIndex = 0; (retCode = RegEnumKeyW(hkResult, dwIndex, szName, COUNT_OF(szName) - 1)) != ERROR_NO_MORE_ITEMS; dwIndex++) {
if (retCode != ERROR_SUCCESS) {
RegCloseKey(hkResult);
CFRelease(result);
return NULL;
} else {
CFStringRef string = CFStringCreateWithBytes(kCFAllocatorSystemDefault, (const UInt8 *)szName, (wcslen(szName) * sizeof(WCHAR)), kCFStringEncodingUTF16, false);
CFArrayAppendValue(result, string);
CFRelease(string);
}
}
RegCloseKey(hkResult);
return result;
}
static void __CFTimeZoneGetOffset(CFStringRef timezone, int32_t *offset) {
typedef struct _REG_TZI_FORMAT {
LONG Bias;
LONG StandardBias;
LONG DaylightBias;
SYSTEMTIME StandardDate;
SYSTEMTIME DaylightDate;
} REG_TZI_FORMAT;
WCHAR szRegKey[COUNT_OF(CF_TIME_ZONES_KEY) + 1 + COUNT_OF(((TIME_ZONE_INFORMATION *)0)->StandardName) + 1];
REG_TZI_FORMAT tziInfo;
Boolean bResult;
DWORD cbData;
HKEY hKey;
*offset = 0;
memset(szRegKey, 0, sizeof(szRegKey));
wcscpy(szRegKey, CF_TIME_ZONES_KEY);
szRegKey[COUNT_OF(CF_TIME_ZONES_KEY) - 1] = L'\\';
CFStringGetBytes(timezone, CFRangeMake(0, CFStringGetLength(timezone)), kCFStringEncodingUnicode, FALSE, FALSE, (uint8_t *)&szRegKey[wcslen(CF_TIME_ZONES_KEY) + 1], sizeof(((TIME_ZONE_INFORMATION *)0)->StandardName) + sizeof(WCHAR), NULL);
if (RegOpenKeyW(HKEY_LOCAL_MACHINE, szRegKey, &hKey) != ERROR_SUCCESS)
return;
cbData = sizeof(tziInfo);
if (RegQueryValueExW(hKey, L"TZI", NULL, NULL, (LPBYTE)&tziInfo, &cbData) == ERROR_SUCCESS)
*offset = tziInfo.Bias * 60; // Bias is in minutes, CF uses seconds for its offset
RegCloseKey(hKey);
}
#elif TARGET_OS_ANDROID
/*
* Android does not ship with the standard Unix Olsen files, with the directory
* structure, and the files with the same name as the time zone.
* Instead all the information is in one file, where all the time zone
* information for all the zones is held. Also, to allow upgrades to the time
* zone database without an update to the system, the database can be overriden
* by a secondary location.
* - /data/misc/zoneinfo/current/tzdata overrides for the time zone information
* from the system.
* - /system/usr/share/zoneinfo/tzdata system time zone information.
* The format of these files is slightly documented in Bionic's source file
* libc/tzcode/bionic.cpp.
* The file start with a header which is 24 bytes long.
* - 6 bytes should be the ASCII string "tzdata"
* - 6 bytes of the Olson database version in ASCII. For example 2018a. Includes
* a final nul character.
* - 4 bytes MSB of the offset of the index inside the file.
* - 4 bytes MSB of the offset of the start of the data inside the file.
* - 4 bytes MSB of the zonetab (unused in this code).
* The index sits between the offset for the index and the offset for the data.
* Each index entry is 52 bytes long.
* - 40 bytes for the name of the zone. Seems to be nul terminated.
* - 4 bytes MSB of the offset to this time zone data. Notice that this offset
* is relative to the data offset from the header.
* - 4 bytes MSB of the data length.
* - 4 bytes unused.
*/
#define ANDROID_TZ_HEADER_SIZE 24
#define ANDROID_TZ_HEADER_TAG_SIZE 6
#define ANDROID_TZ_HEADER_INDEX_OFFSET 12
#define ANDROID_TZ_HEADER_DATA_OFFSET 16
#define ANDROID_TZ_ENTRY_SIZE 52
#define ANDROID_TZ_ENTRY_NAME_LENGTH 40
#define ANDROID_TZ_ENTRY_START_OFFSET 40
#define ANDROID_TZ_ENTRY_LENGTH_OFFSET 44
/**
* Callback invoked for each of the time zones in the timezone file.
* - name: The name of the time zone.
* - offset: The final offset inside the file of the data for the time zone.
* - length: The length of the data for the time zone.
* - fp: The file pointer to read the data from. The file might not be in the
* right offset, so if you want to read the right time zone data, you
* probably want to fseek into offset.
* - context1: The argument passed into __CFAndroidTimeZoneListEnumerate.
* - context2: The argument passed into __CFAndroidTimeZoneListEnumerate.
*/
typedef Boolean (*__CFAndroidTimeZoneListEnumerateCallback)(const char name[ANDROID_TZ_ENTRY_NAME_LENGTH], int32_t offset, int32_t length, FILE *fp, void *context1, void *context2);
static void __CFAndroidTimeZoneParse(FILE *fp, __CFAndroidTimeZoneListEnumerateCallback callback, void *context1, void *context2) {
if (!fp) {
return;
}
char header[ANDROID_TZ_HEADER_SIZE];
if (fread(header, 1, sizeof(header), fp) != sizeof(header)) {
return;
}
if (strncmp(header, "tzdata", ANDROID_TZ_HEADER_TAG_SIZE) != 0) {
return;
}
int32_t indexOffset;
memcpy(&indexOffset, &header[ANDROID_TZ_HEADER_INDEX_OFFSET], sizeof(int32_t));
indexOffset = betoh32(indexOffset);
int32_t dataOffset;
memcpy(&dataOffset, &header[ANDROID_TZ_HEADER_DATA_OFFSET], sizeof(int32_t));
dataOffset = betoh32(dataOffset);
if (indexOffset < 0 || dataOffset < indexOffset) {
return;
}
if (fseek(fp, indexOffset, SEEK_SET) != 0) {
return;
}
char entry[52];
size_t indexSize = dataOffset - indexOffset;
size_t zoneCount = indexSize / sizeof(entry);
if (zoneCount * sizeof(entry) != indexSize) {
return;
}
for (size_t idx = 0; idx < zoneCount; idx++) {
if (fread(entry, 1, sizeof(entry), fp) != sizeof(entry)) {
break;
}
int32_t start;
memcpy(&start, &entry[ANDROID_TZ_ENTRY_START_OFFSET], sizeof(int32_t));
start = betoh32(start);
start += dataOffset;
int32_t length;
memcpy(&length, &entry[ANDROID_TZ_ENTRY_LENGTH_OFFSET], sizeof(int32_t));
length = betoh32(length);
if (start < 0 || length < 0) {
break;
}
long pos = ftell(fp);
Boolean done = callback(entry, start, length, fp, context1, context2);
if (done || fseek(fp, pos, SEEK_SET) != 0) {
break;
}
}
}
static void __CFAndroidTimeZoneListEnumerate(__CFAndroidTimeZoneListEnumerateCallback callback, void *context1, void *context2) {
// The best reference should be Android Bionic's libc/tzcode/bionic.cpp
static const char *tzDataFiles[] = {
"/data/misc/zoneinfo/current/tzdata",
"/system/usr/share/zoneinfo/tzdata"
};
for (int idx = 0; idx < COUNT_OF(tzDataFiles); idx++) {
FILE *fp = fopen(tzDataFiles[idx], "rb");
__CFAndroidTimeZoneParse(fp, callback, context1, context2);
if (fp) {
fclose(fp);
}
}
}
static Boolean __CFCopyAndroidTimeZoneListCallback(const char name[ANDROID_TZ_ENTRY_NAME_LENGTH], int32_t start, int32_t length, FILE *fp, void *context1, void *context2) {
CFMutableArrayRef result = (CFMutableArrayRef)context1;
CFStringRef timeZoneName = CFStringCreateWithCString(kCFAllocatorSystemDefault, name, kCFStringEncodingASCII);
CFArrayAppendValue(result, timeZoneName);
CFRelease(timeZoneName);
return FALSE;
}
static Boolean __CFTimeZoneDataCreateCallback(const char name[ANDROID_TZ_ENTRY_NAME_LENGTH], int32_t start, int32_t length, FILE *fp, void *context1, void *context2) {
char *tzNameCstr = (char *)context1;
CFDataRef *dataPtr = (CFDataRef *)context2;
if (strncmp(tzNameCstr, name, ANDROID_TZ_ENTRY_NAME_LENGTH) == 0) {
if (fseek(fp, start, SEEK_SET) != 0) {
return TRUE;
}
uint8_t *bytes = malloc(length);
if (!bytes) {
return TRUE;
}
if (fread(bytes, 1, length, fp) != length) {
free(bytes);
return TRUE;
}
*dataPtr = CFDataCreate(kCFAllocatorSystemDefault, bytes, length);
free(bytes);
return TRUE;
}
return FALSE;
}
static CFMutableArrayRef __CFCopyAndroidTimeZoneList() {
CFMutableArrayRef result = CFArrayCreateMutable(kCFAllocatorSystemDefault, 0, &kCFTypeArrayCallBacks);
__CFAndroidTimeZoneListEnumerate(__CFCopyAndroidTimeZoneListCallback, result, NULL);
return result;
}
#elif TARGET_OS_MAC || TARGET_OS_LINUX || TARGET_OS_BSD || TARGET_OS_WASI
static CFMutableArrayRef __CFCopyRecursiveDirectoryList() {
CFMutableArrayRef result = CFArrayCreateMutable(kCFAllocatorSystemDefault, 0, &kCFTypeArrayCallBacks);
#if !TARGET_OS_ANDROID
if (!__tzDir) __InitTZStrings();
if (!__tzDir) return result;
#endif
int fd = open(__tzDir, O_RDONLY);
for (; 0 <= fd;) {
uint8_t buffer[4096];
ssize_t len = read(fd, buffer, sizeof(buffer));
if (len <= 0) break;
if (len < sizeof(buffer)) {
// assumes that partial read only occurs at the end of the file
buffer[len] = '\n';
len++;
}
const uint8_t *bytes = buffer;
for (;;) {
const uint8_t *nextl = memchr(bytes, '\n', len);
if (!nextl) break;
nextl++;
if ('#' == *bytes) {
len -= (nextl - bytes);
bytes = nextl;
continue;
}
const uint8_t *tab1 = memchr(bytes, '\t', (nextl - bytes));
if (!tab1) {
len -= (nextl - bytes);
bytes = nextl;
continue;
}
tab1++;
len -= (tab1 - bytes);
bytes = tab1;
const uint8_t *tab2 = memchr(bytes, '\t', (nextl - bytes));
if (!tab2) {
len -= (nextl - bytes);
bytes = nextl;
continue;
}
tab2++;
len -= (tab2 - bytes);
bytes = tab2;
const uint8_t *tab3 = memchr(bytes, '\t', (nextl - bytes));
int nmlen = tab3 ? (tab3 - bytes) : (nextl - 1 - bytes);
CFStringRef string = CFStringCreateWithBytes(kCFAllocatorSystemDefault, bytes, nmlen, kCFStringEncodingUTF8, false);
CFArrayAppendValue(result, string);
CFRelease(string);
len -= (nextl - bytes);
bytes = nextl;
}
lseek(fd, -len, SEEK_CUR);
}
close(fd);
return result;
}
#else
#error Unknown or unspecified DEPLOYMENT_TARGET
#endif
typedef struct _CFTZPeriod {
int32_t startSec;
CFStringRef abbrev;
uint32_t info;
} CFTZPeriod;
struct __CFTimeZone {
CFRuntimeBase _base;
CFStringRef _name; /* immutable */
CFDataRef _data; /* immutable */
CFTZPeriod *_periods; /* immutable */
int32_t _periodCnt; /* immutable */
};
/* startSec is the whole integer seconds from a CFAbsoluteTime, giving dates
* between 1933 and 2069; info outside these years is discarded on read-in */
/* Bits 31-18 of the info are unused */
/* Bit 17 of the info is used for the is-DST state */
/* Bit 16 of the info is used for the sign of the offset (1 == negative) */
/* Bits 15-0 of the info are used for abs(offset) in seconds from GMT */
CF_INLINE void __CFTZPeriodInit(CFTZPeriod *period, int32_t startTime, CFStringRef abbrev, int32_t offset, Boolean isDST) {
period->startSec = startTime;
period->abbrev = abbrev ? (CFStringRef)CFRetain(abbrev) : NULL;
__CFBitfieldSetValue(period->info, 15, 0, abs(offset));
__CFBitfieldSetValue(period->info, 16, 16, (offset < 0 ? 1 : 0));
__CFBitfieldSetValue(period->info, 17, 17, (isDST ? 1 : 0));
}
CF_INLINE int32_t __CFTZPeriodStartSeconds(const CFTZPeriod *period) {
return period->startSec;
}
CF_INLINE CFStringRef __CFTZPeriodAbbreviation(const CFTZPeriod *period) {
return period->abbrev;
}
CF_INLINE int32_t __CFTZPeriodGMTOffset(const CFTZPeriod *period) {
int32_t v = __CFBitfieldGetValue(period->info, 15, 0);
if (__CFBitfieldGetValue(period->info, 16, 16)) v = -v;
return v;
}
CF_INLINE Boolean __CFTZPeriodIsDST(const CFTZPeriod *period) {
return (Boolean)__CFBitfieldGetValue(period->info, 17, 17);
}
static CFComparisonResult __CFCompareTZPeriods(const void *val1, const void *val2, void *context) {
CFTZPeriod *tzp1 = (CFTZPeriod *)val1;
CFTZPeriod *tzp2 = (CFTZPeriod *)val2;
// we treat equal as less than, as the code which uses the
// result of the bsearch doesn't expect exact matches
// (they're pretty rare, so no point in over-coding for them)
if (__CFTZPeriodStartSeconds(tzp1) <= __CFTZPeriodStartSeconds(tzp2)) return kCFCompareLessThan;
return kCFCompareGreaterThan;
}
static CFIndex __CFBSearchTZPeriods(CFTimeZoneRef tz, CFAbsoluteTime at) {
CFTZPeriod elem;
__CFTZPeriodInit(&elem, (int32_t)floor(at + 1.0), NULL, 0, false);
CFIndex idx = CFBSearch(&elem, sizeof(CFTZPeriod), tz->_periods, tz->_periodCnt, __CFCompareTZPeriods, NULL);
if (tz->_periodCnt <= idx) {
idx = tz->_periodCnt;
} else if (0 == idx) {
idx = 1;
}
return idx - 1;
}
CF_INLINE int32_t __CFDetzcode(const unsigned char *bufp) {
// `result` is uint32_t to avoid undefined behaviour of shifting left negative values
uint32_t result = (bufp[0] & 0x80) ? ~0L : 0L;
result = (result << 8) | (bufp[0] & 0xff);
result = (result << 8) | (bufp[1] & 0xff);
result = (result << 8) | (bufp[2] & 0xff);
result = (result << 8) | (bufp[3] & 0xff);
return (int32_t)result;
}
CF_INLINE void __CFEntzcode(int32_t value, unsigned char *bufp) {
bufp[0] = (value >> 24) & 0xff;
bufp[1] = (value >> 16) & 0xff;
bufp[2] = (value >> 8) & 0xff;
bufp[3] = (value >> 0) & 0xff;
}
static Boolean __CFParseTimeZoneData(CFAllocatorRef allocator, CFDataRef data, CFTZPeriod **tzpp, CFIndex *cntp) {
int32_t len, timecnt, typecnt, charcnt, idx, cnt;
const uint8_t *p, *timep, *typep, *ttisp, *charp;
CFStringRef *abbrs;
Boolean result = true;
p = CFDataGetBytePtr(data);
len = CFDataGetLength(data);
if (len < (int32_t)sizeof(struct tzhead)) {
return false;
}
if (!(p[0] == 'T' && p[1] == 'Z' && p[2] == 'i' && p[3] == 'f')) return false; /* Don't parse without TZif at head of file */
p += 20 + 4 + 4 + 4; /* skip reserved, ttisgmtcnt, ttisstdcnt, leapcnt */
timecnt = __CFDetzcode(p);
p += 4;
typecnt = __CFDetzcode(p);
p += 4;
charcnt = __CFDetzcode(p);
p += 4;
if (typecnt <= 0 || timecnt < 0 || charcnt < 0) {
return false;
}
if (1024 < timecnt || 32 < typecnt || 128 < charcnt) {
// reject excessive timezones to avoid arithmetic overflows for
// security reasons and to reject potentially corrupt files
return false;
}
if (len - (int32_t)sizeof(struct tzhead) < (4 + 1) * timecnt + (4 + 1 + 1) * typecnt + charcnt) {
return false;
}
timep = p;
typep = timep + 4 * timecnt;
ttisp = typep + timecnt;
charp = ttisp + (4 + 1 + 1) * typecnt;
cnt = (0 < timecnt) ? timecnt : 1;
*tzpp = CFAllocatorAllocate(allocator, cnt * sizeof(CFTZPeriod), 0);
if (__CFOASafe) __CFSetLastAllocationEventName(*tzpp, "CFTimeZone (store)");
memset(*tzpp, 0, cnt * sizeof(CFTZPeriod));
abbrs = CFAllocatorAllocate(allocator, (charcnt + 1) * sizeof(CFStringRef), 0);
if (__CFOASafe) __CFSetLastAllocationEventName(abbrs, "CFTimeZone (temp)");
for (idx = 0; idx < charcnt + 1; idx++) {
abbrs[idx] = NULL;
}
for (idx = 0; idx < cnt; idx++) {
CFAbsoluteTime at;
int32_t itime, offset;
uint8_t type, dst, abbridx;
at = (CFAbsoluteTime)(__CFDetzcode(timep) + 0.0) - kCFAbsoluteTimeIntervalSince1970;
if (0 == timecnt) itime = INT_MIN;
else if (at < (CFAbsoluteTime)INT_MIN) itime = INT_MIN;
else if ((CFAbsoluteTime)INT_MAX < at) itime = INT_MAX;
else itime = (int32_t)at;
timep += 4; /* harmless if 0 == timecnt */
type = (0 < timecnt) ? (uint8_t)*typep++ : 0;
if (typecnt <= type) {
result = false;
break;
}
offset = __CFDetzcode(ttisp + 6 * type);
dst = (uint8_t)*(ttisp + 6 * type + 4);
if (0 != dst && 1 != dst) {
result = false;
break;
}
abbridx = (uint8_t)*(ttisp + 6 * type + 5);
if (charcnt < abbridx) {
result = false;
break;
}
if (NULL == abbrs[abbridx]) {
abbrs[abbridx] = CFStringCreateWithCString(allocator, (char *)&charp[abbridx], kCFStringEncodingASCII);
}
__CFTZPeriodInit(*tzpp + idx, itime, abbrs[abbridx], offset, (dst ? true : false));
}
for (idx = 0; idx < charcnt + 1; idx++) {
if (NULL != abbrs[idx]) {
CFRelease(abbrs[idx]);
}
}
CFAllocatorDeallocate(allocator, abbrs);
if (result) {
// dump all but the last INT_MIN and the first INT_MAX
for (idx = 0; idx < cnt; idx++) {
if (((*tzpp + idx)->startSec == INT_MIN) && (idx + 1 < cnt) && (((*tzpp + idx + 1)->startSec == INT_MIN))) {
if (NULL != (*tzpp + idx)->abbrev) CFRelease((*tzpp + idx)->abbrev);
cnt--;
memmove((*tzpp + idx), (*tzpp + idx + 1), sizeof(CFTZPeriod) * (cnt - idx));
idx--;
}
}
// Don't combine these loops! Watch the idx decrementing...
for (idx = 0; idx < cnt; idx++) {
if (((*tzpp + idx)->startSec == INT_MAX) && (0 < idx) && (((*tzpp + idx - 1)->startSec == INT_MAX))) {
if (NULL != (*tzpp + idx)->abbrev) CFRelease((*tzpp + idx)->abbrev);
cnt--;
memmove((*tzpp + idx), (*tzpp + idx + 1), sizeof(CFTZPeriod) * (cnt - idx));
idx--;
}
}
CFQSortArray(*tzpp, cnt, sizeof(CFTZPeriod), __CFCompareTZPeriods, NULL);
// if the first period is in DST and there is more than one period, drop it
if (1 < cnt && __CFTZPeriodIsDST(*tzpp + 0)) {
if (NULL != (*tzpp + 0)->abbrev) CFRelease((*tzpp + 0)->abbrev);
cnt--;
memmove((*tzpp + 0), (*tzpp + 0 + 1), sizeof(CFTZPeriod) * (cnt - 0));
}
*cntp = cnt;
} else {
CFAllocatorDeallocate(allocator, *tzpp);
*tzpp = NULL;
}
return result;
}
static Boolean __CFTimeZoneEqual(CFTypeRef cf1, CFTypeRef cf2) {
CFTimeZoneRef tz1 = (CFTimeZoneRef)cf1;
CFTimeZoneRef tz2 = (CFTimeZoneRef)cf2;
if (!CFEqual(CFTimeZoneGetName(tz1), CFTimeZoneGetName(tz2))) return false;
if (!CFEqual(CFTimeZoneGetData(tz1), CFTimeZoneGetData(tz2))) return false;
return true;
}
static CFHashCode __CFTimeZoneHash(CFTypeRef cf) {
CFTimeZoneRef tz = (CFTimeZoneRef)cf;
return CFHash(CFTimeZoneGetName(tz));
}
static CFStringRef __CFTimeZoneCopyDescription(CFTypeRef cf) {
CFTimeZoneRef tz = (CFTimeZoneRef)cf;
CFStringRef result, abbrev;
CFAbsoluteTime at;
at = CFAbsoluteTimeGetCurrent();
abbrev = CFTimeZoneCopyAbbreviation(tz, at);
result = CFStringCreateWithFormat(kCFAllocatorSystemDefault, NULL, CFSTR("<CFTimeZone %p [%p]>{name = %@; abbreviation = %@; GMT offset = %g; is DST = %s}"), cf, CFGetAllocator(tz), tz->_name, abbrev, CFTimeZoneGetSecondsFromGMT(tz, at), CFTimeZoneIsDaylightSavingTime(tz, at) ? "true" : "false");
CFRelease(abbrev);
return result;
}
static void __CFTimeZoneDeallocate(CFTypeRef cf) {
CFTimeZoneRef tz = (CFTimeZoneRef)cf;
CFAllocatorRef allocator = CFGetAllocator(tz);
CFIndex idx;
if (tz->_name) CFRelease(tz->_name);
if (tz->_data) CFRelease(tz->_data);
for (idx = 0; idx < tz->_periodCnt; idx++) {
if (NULL != tz->_periods[idx].abbrev) CFRelease(tz->_periods[idx].abbrev);
}
if (NULL != tz->_periods) CFAllocatorDeallocate(allocator, tz->_periods);
}
const CFRuntimeClass __CFTimeZoneClass = {
0,
"CFTimeZone",
NULL, // init
NULL, // copy
__CFTimeZoneDeallocate,
__CFTimeZoneEqual,
__CFTimeZoneHash,
NULL, //
__CFTimeZoneCopyDescription
};
CFTypeID CFTimeZoneGetTypeID(void) {
return _kCFRuntimeIDCFTimeZone;
}
#if TARGET_OS_MAC
static void __InitTZStrings(void) {
static dispatch_once_t initOnce = 0;
dispatch_once(&initOnce, ^{
unsigned int major = 0, minor = 0, patch = 0;
CFDictionaryRef dict = _CFCopySystemVersionDictionary();
if (dict) {
CFStringRef version = CFDictionaryGetValue(dict, _kCFSystemVersionProductVersionKey);
if (version) {
const char *cStr = CFStringGetCStringPtr(version, kCFStringEncodingASCII);
if (cStr) {
if (sscanf(cStr, "%u.%u.%u", &major, &minor, &patch) != 3) {
major = 0;
minor = 0;
patch = 0;
}
}
}
CFRelease(dict);
}
// Timezone files moved in High Sierra(10.13)
if (major == 10 && minor < 13) {
// older versions
__tzZoneInfo = CFSTR(MACOS_TZDIR1);
__tzDir = MACOS_TZDIR1 "zone.tab";
} else {
__tzZoneInfo = CFSTR(MACOS_TZDIR2);
__tzDir = MACOS_TZDIR2 "zone.tab";
}
});
}
#elif TARGET_OS_ANDROID || TARGET_OS_WINDOWS
// Nothing
#elif TARGET_OS_LINUX || TARGET_OS_BSD || TARGET_OS_WASI
static void __InitTZStrings(void) {
__tzZoneInfo = CFSTR(TZDIR);
__tzDir = TZDIR "zone.tab";
}
#else
#error Unknown or unspecified DEPLOYMENT_TARGET
#endif
static CFTimeZoneRef __CFTimeZoneCreateSystem(void) {
CFTimeZoneRef result = NULL;
CFStringRef name = NULL;
#if TARGET_OS_WIN32
TIME_ZONE_INFORMATION tzi = { 0 };
DWORD rval = GetTimeZoneInformation(&tzi);
if (rval != TIME_ZONE_ID_INVALID) {
LPWSTR standardName = (LPWSTR)&tzi.StandardName;
CFStringRef cfStandardName = CFStringCreateWithBytes(kCFAllocatorSystemDefault, (UInt8 *)standardName, wcslen(standardName)*sizeof(WCHAR), kCFStringEncodingUTF16LE, false);
if (cfStandardName) {
name = _CFTimeZoneCopyOlsonNameForWindowsName(cfStandardName);
CFRelease(cfStandardName);
}
} else {
CFLog(kCFLogLevelError, CFSTR("Couldn't get time zone information error %d"), GetLastError());
}
#else
const char *tzenv;
int ret;
char linkbuf[CFMaxPathSize];
tzenv = __CFgetenv("TZFILE");
if (NULL != tzenv) {
CFStringRef name = CFStringCreateWithBytes(kCFAllocatorSystemDefault, (uint8_t *)tzenv, strlen(tzenv), kCFStringEncodingUTF8, false);
result = CFTimeZoneCreateWithName(kCFAllocatorSystemDefault, name, false);
CFRelease(name);
if (result) return result;
}
tzenv = __CFgetenv("TZ");
if (NULL != tzenv) {
CFStringRef name = CFStringCreateWithBytes(kCFAllocatorSystemDefault, (uint8_t *)tzenv, strlen(tzenv), kCFStringEncodingUTF8, false);
result = CFTimeZoneCreateWithName(kCFAllocatorSystemDefault, name, true);
CFRelease(name);
if (result) return result;
}
#if !TARGET_OS_ANDROID && !TARGET_OS_WASI
if (!__tzZoneInfo) __InitTZStrings();
ret = readlink(TZDEFAULT, linkbuf, sizeof(linkbuf));
// The link can be relative, we treat this the same as if there was no link
if (__tzZoneInfo && (0 < ret) && (linkbuf[0] != '.')) {
linkbuf[ret] = '\0';
const char *tzZoneInfo = CFStringGetCStringPtr(__tzZoneInfo, kCFStringEncodingASCII);
size_t zoneInfoDirLen = CFStringGetLength(__tzZoneInfo);
if (strncmp(linkbuf, tzZoneInfo, zoneInfoDirLen) == 0) {
name = CFStringCreateWithBytes(kCFAllocatorSystemDefault, (uint8_t *)linkbuf + zoneInfoDirLen,
strlen(linkbuf) - zoneInfoDirLen, kCFStringEncodingUTF8, false);
} else {
name = CFStringCreateWithBytes(kCFAllocatorSystemDefault, (uint8_t *)linkbuf, strlen(linkbuf), kCFStringEncodingUTF8, false);
}
} else
#endif
{
#if !TARGET_OS_WASI
// TODO: This can still fail on Linux if the time zone is not recognized by ICU later
// Try localtime
tzset();
#endif
time_t t = time(NULL);
struct tm lt = {0};
localtime_r(&t, <);
name = CFStringCreateWithCString(kCFAllocatorSystemDefault, lt.tm_zone, kCFStringEncodingUTF8);
}
#endif
if (name) {
result = CFTimeZoneCreateWithName(kCFAllocatorSystemDefault, name, true);
CFRelease(name);
if (result) return result;
}
return CFTimeZoneCreateWithTimeIntervalFromGMT(kCFAllocatorSystemDefault, 0.0);
}
CFTimeZoneRef CFTimeZoneCopySystem(void) {
CFTimeZoneRef tz;
__CFTimeZoneLockGlobal();
if (NULL == __CFTimeZoneSystem) {
__CFTimeZoneUnlockGlobal();
tz = __CFTimeZoneCreateSystem();
__CFTimeZoneLockGlobal();
if (NULL == __CFTimeZoneSystem) {
__CFTimeZoneSystem = tz;
} else {
if (tz) CFRelease(tz);
}
}
tz = __CFTimeZoneSystem ? (CFTimeZoneRef)CFRetain(__CFTimeZoneSystem) : NULL;
__CFTimeZoneUnlockGlobal();
return tz;
}
static CFIndex __noteCount = 0;
void CFTimeZoneResetSystem(void) {
__CFTimeZoneLockGlobal();
if (__CFTimeZoneDefault == __CFTimeZoneSystem) {
if (__CFTimeZoneDefault) CFRelease(__CFTimeZoneDefault);
__CFTimeZoneDefault = NULL;
}
CFTimeZoneRef tz = __CFTimeZoneSystem;
__CFTimeZoneSystem = NULL;
__CFTimeZoneUnlockGlobal();
if (tz) CFRelease(tz);
}
CFIndex _CFTimeZoneGetNoteCount(void) {
return __noteCount;
}
CFTimeZoneRef CFTimeZoneCopyDefault(void) {
CFTimeZoneRef tz;
__CFTimeZoneLockGlobal();
if (NULL == __CFTimeZoneDefault) {
__CFTimeZoneUnlockGlobal();
tz = CFTimeZoneCopySystem();
__CFTimeZoneLockGlobal();
if (NULL == __CFTimeZoneDefault) {
__CFTimeZoneDefault = tz;
} else {
if (tz) CFRelease(tz);
}
}
tz = __CFTimeZoneDefault ? (CFTimeZoneRef)CFRetain(__CFTimeZoneDefault) : NULL;
__CFTimeZoneUnlockGlobal();
return tz;
}
void CFTimeZoneSetDefault(CFTimeZoneRef tz) {
if (tz) __CFGenericValidateType(tz, CFTimeZoneGetTypeID());
__CFTimeZoneLockGlobal();
if (tz != __CFTimeZoneDefault) {
if (tz) CFRetain(tz);
if (__CFTimeZoneDefault) CFRelease(__CFTimeZoneDefault);
__CFTimeZoneDefault = tz;
}
__CFTimeZoneUnlockGlobal();
}
static CFDictionaryRef __CFTimeZoneCopyCompatibilityDictionary(void);
static Boolean __nameStringOK(CFStringRef name);
CFArrayRef CFTimeZoneCopyKnownNames(void) {
CFArrayRef tzs;
__CFTimeZoneLockGlobal();
if (NULL == __CFKnownTimeZoneList) {
CFMutableArrayRef list;
/* TimeZone information locate in the registry for Win32
* (Aleksey Dukhnyakov)
*/
#if TARGET_OS_WIN32
list = __CFCopyWindowsTimeZoneList();
#elif TARGET_OS_ANDROID
list = __CFCopyAndroidTimeZoneList();
#else
list = __CFCopyRecursiveDirectoryList();
#endif
// Remove undesirable ancient cruft
CFDictionaryRef dict = __CFTimeZoneCopyCompatibilityDictionary();
CFIndex idx;
for (idx = CFArrayGetCount(list); idx--; ) {
CFStringRef item = (CFStringRef)CFArrayGetValueAtIndex(list, idx);
if (CFDictionaryContainsKey(dict, item) || !__nameStringOK(item)) {
CFArrayRemoveValueAtIndex(list, idx);
}
}
__CFKnownTimeZoneList = CFArrayCreateCopy(kCFAllocatorSystemDefault, list);
CFRelease(list);
}
tzs = __CFKnownTimeZoneList ? (CFArrayRef)CFRetain(__CFKnownTimeZoneList) : NULL;
__CFTimeZoneUnlockGlobal();
return tzs;
}
/* The criteria here are sort of: coverage for the U.S. and Europe,
* large cities, abbreviation uniqueness, and perhaps a few others.
* But do not make the list too large with obscure information.
*/
static const char *__CFTimeZoneAbbreviationDefaults =
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
" <!DOCTYPE plist SYSTEM \"file://localhost/System/Library/DTDs/PropertyList.dtd\">"
" <plist version=\"1.0\">"
" <dict>"
" <key>ADT</key> <string>America/Halifax</string>"
" <key>AKDT</key> <string>America/Juneau</string>"
" <key>AKST</key> <string>America/Juneau</string>"
" <key>ART</key> <string>America/Argentina/Buenos_Aires</string>"
" <key>AST</key> <string>America/Halifax</string>"
" <key>BDT</key> <string>Asia/Dhaka</string>"
" <key>BRST</key> <string>America/Sao_Paulo</string>"
" <key>BRT</key> <string>America/Sao_Paulo</string>"
" <key>BST</key> <string>Europe/London</string>"
" <key>CAT</key> <string>Africa/Harare</string>"
" <key>CDT</key> <string>America/Chicago</string>"
" <key>CEST</key> <string>Europe/Paris</string>"
" <key>CET</key> <string>Europe/Paris</string>"
" <key>CLST</key> <string>America/Santiago</string>"
" <key>CLT</key> <string>America/Santiago</string>"
" <key>COT</key> <string>America/Bogota</string>"
" <key>CST</key> <string>America/Chicago</string>"
" <key>EAT</key> <string>Africa/Addis_Ababa</string>"
" <key>EDT</key> <string>America/New_York</string>"
" <key>EEST</key> <string>Europe/Istanbul</string>"
" <key>EET</key> <string>Europe/Istanbul</string>"
" <key>EST</key> <string>America/New_York</string>"
" <key>GMT</key> <string>GMT</string>"
" <key>GST</key> <string>Asia/Dubai</string>"
" <key>HKT</key> <string>Asia/Hong_Kong</string>"
" <key>HST</key> <string>Pacific/Honolulu</string>"
" <key>ICT</key> <string>Asia/Bangkok</string>"
" <key>IRST</key> <string>Asia/Tehran</string>"
" <key>IST</key> <string>Asia/Calcutta</string>"
" <key>JST</key> <string>Asia/Tokyo</string>"
" <key>KST</key> <string>Asia/Seoul</string>"
" <key>MDT</key> <string>America/Denver</string>"
" <key>MSD</key> <string>Europe/Moscow</string>"
" <key>MSK</key> <string>Europe/Moscow</string>"
" <key>MST</key> <string>America/Denver</string>"
" <key>NZDT</key> <string>Pacific/Auckland</string>"
" <key>NZST</key> <string>Pacific/Auckland</string>"
" <key>PDT</key> <string>America/Los_Angeles</string>"
" <key>PET</key> <string>America/Lima</string>"
" <key>PHT</key> <string>Asia/Manila</string>"
" <key>PKT</key> <string>Asia/Karachi</string>"
" <key>PST</key> <string>America/Los_Angeles</string>"
" <key>SGT</key> <string>Asia/Singapore</string>"
" <key>UTC</key> <string>UTC</string>"
" <key>WAT</key> <string>Africa/Lagos</string>"
" <key>WEST</key> <string>Europe/Lisbon</string>"
" <key>WET</key> <string>Europe/Lisbon</string>"
" <key>WIT</key> <string>Asia/Jakarta</string>"
" </dict>"
" </plist>";
CFDictionaryRef CFTimeZoneCopyAbbreviationDictionary(void) {
CFDictionaryRef dict;
__CFTimeZoneLockAbbreviations();
if (NULL == __CFTimeZoneAbbreviationDict) {
CFDataRef data = CFDataCreate(kCFAllocatorSystemDefault, (uint8_t *)__CFTimeZoneAbbreviationDefaults, strlen(__CFTimeZoneAbbreviationDefaults));
__CFTimeZoneAbbreviationDict = (CFDictionaryRef)CFPropertyListCreateFromXMLData(kCFAllocatorSystemDefault, data, kCFPropertyListImmutable, NULL);
CFRelease(data);
}
if (NULL == __CFTimeZoneAbbreviationDict) {
__CFTimeZoneAbbreviationDict = CFDictionaryCreate(kCFAllocatorSystemDefault, NULL, NULL, 0, NULL, NULL);
}
dict = __CFTimeZoneAbbreviationDict ? (CFDictionaryRef)CFRetain(__CFTimeZoneAbbreviationDict) : NULL;
__CFTimeZoneUnlockAbbreviations();
return dict;
}
void _removeFromCache(const void *key, const void *value, void *context) {
CFDictionaryRemoveValue(__CFTimeZoneCache, (CFStringRef)key);
}
void CFTimeZoneSetAbbreviationDictionary(CFDictionaryRef dict) {
__CFGenericValidateType(dict, CFDictionaryGetTypeID());
__CFTimeZoneLockGlobal();
if (dict != __CFTimeZoneAbbreviationDict) {
if (dict) CFRetain(dict);
if (__CFTimeZoneAbbreviationDict) {
CFDictionaryApplyFunction(__CFTimeZoneAbbreviationDict, _removeFromCache, NULL);
CFRelease(__CFTimeZoneAbbreviationDict);
}
__CFTimeZoneAbbreviationDict = dict;
}
__CFTimeZoneUnlockGlobal();
}
CF_INLINE const UChar *STRING_to_UTF16(CFStringRef S) { // UTF16String
CFIndex length = CFStringGetLength((CFStringRef)S);
UChar *buffer = (UChar *)malloc((length + 1) * sizeof(UChar));
CFStringGetBytes((CFStringRef)(S), CFRangeMake(0, CFStringGetLength((CFStringRef)S)), kCFStringEncodingUTF16, 0, false, (UInt8 *)buffer, length * sizeof(UChar), NULL);
buffer[length] = 0;
return buffer;
}
CF_INLINE void FREE_STRING_to_UTF16(const UChar *buf) {
free((void *)buf);
}
static int32_t __tryParseGMTName(CFStringRef name) {
CFIndex len = CFStringGetLength(name);
if (len < 3 || 9 < len) return -1;