1 | /*****************************************************************************/ |
2 | // Copyright 2006-2008 Adobe Systems Incorporated |
3 | // All Rights Reserved. |
4 | // |
5 | // NOTICE: Adobe permits you to use, modify, and distribute this file in |
6 | // accordance with the terms of the Adobe license agreement accompanying it. |
7 | /*****************************************************************************/ |
8 | |
9 | /* $Id: //mondo/dng_sdk_1_4/dng_sdk/source/dng_date_time.cpp#2 $ */ |
10 | /* $DateTime: 2012/06/01 07:28:57 $ */ |
11 | /* $Change: 832715 $ */ |
12 | /* $Author: tknoll $ */ |
13 | |
14 | /*****************************************************************************/ |
15 | |
16 | #include "dng_date_time.h" |
17 | |
18 | #include "dng_exceptions.h" |
19 | #include "dng_mutex.h" |
20 | #include "dng_stream.h" |
21 | #include "dng_string.h" |
22 | #include "dng_utils.h" |
23 | |
24 | #include <time.h> |
25 | |
26 | #if qMacOS |
27 | #include <TargetConditionals.h> |
28 | #if TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR |
29 | #include <MobileCoreServices/MobileCoreServices.h> |
30 | #else |
31 | #include <CoreServices/CoreServices.h> |
32 | #endif // TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR |
33 | #endif // qMacOS |
34 | |
35 | #if qWinOS |
36 | #include <windows.h> |
37 | #endif |
38 | |
39 | /******************************************************************************/ |
40 | |
41 | // MWG says don't use fake time zones in XMP, but there is some |
42 | // old software that requires them to work correctly. |
43 | |
44 | bool gDNGUseFakeTimeZonesInXMP = false; |
45 | |
46 | /******************************************************************************/ |
47 | |
48 | dng_date_time::dng_date_time () |
49 | |
50 | : fYear (0) |
51 | , fMonth (0) |
52 | , fDay (0) |
53 | , fHour (0) |
54 | , fMinute (0) |
55 | , fSecond (0) |
56 | |
57 | { |
58 | |
59 | } |
60 | |
61 | /******************************************************************************/ |
62 | |
63 | dng_date_time::dng_date_time (uint32 year, |
64 | uint32 month, |
65 | uint32 day, |
66 | uint32 hour, |
67 | uint32 minute, |
68 | uint32 second) |
69 | |
70 | : fYear (year) |
71 | , fMonth (month) |
72 | , fDay (day) |
73 | , fHour (hour) |
74 | , fMinute (minute) |
75 | , fSecond (second) |
76 | |
77 | { |
78 | |
79 | } |
80 | |
81 | /******************************************************************************/ |
82 | |
83 | bool dng_date_time::IsValid () const |
84 | { |
85 | |
86 | return fYear >= 1 && fYear <= 9999 && |
87 | fMonth >= 1 && fMonth <= 12 && |
88 | fDay >= 1 && fDay <= 31 && |
89 | fHour <= 23 && |
90 | fMinute <= 59 && |
91 | fSecond <= 59; |
92 | |
93 | } |
94 | |
95 | /*****************************************************************************/ |
96 | |
97 | void dng_date_time::Clear () |
98 | { |
99 | |
100 | *this = dng_date_time (); |
101 | |
102 | } |
103 | |
104 | /*****************************************************************************/ |
105 | |
106 | static uint32 DateTimeParseU32 (const char *&s) |
107 | { |
108 | |
109 | uint32 x = 0; |
110 | |
111 | while (*s == ' ' || *s == ':') |
112 | s++; |
113 | |
114 | while (*s >= '0' && *s <= '9') |
115 | { |
116 | x = SafeUint32Mult(x, 10); |
117 | x = SafeUint32Add(x, (uint32) (*(s++) - '0')); |
118 | } |
119 | |
120 | return x; |
121 | |
122 | } |
123 | |
124 | /*****************************************************************************/ |
125 | |
126 | bool dng_date_time::Parse (const char *s) |
127 | { |
128 | |
129 | fYear = DateTimeParseU32 (s); |
130 | fMonth = DateTimeParseU32 (s); |
131 | fDay = DateTimeParseU32 (s); |
132 | fHour = DateTimeParseU32 (s); |
133 | fMinute = DateTimeParseU32 (s); |
134 | fSecond = DateTimeParseU32 (s); |
135 | |
136 | return IsValid (); |
137 | |
138 | } |
139 | |
140 | /*****************************************************************************/ |
141 | |
142 | dng_string dng_time_zone::Encode_ISO_8601 () const |
143 | { |
144 | |
145 | dng_string result; |
146 | |
147 | if (IsValid ()) |
148 | { |
149 | |
150 | if (OffsetMinutes () == 0) |
151 | { |
152 | |
153 | result.Set ("Z" ); |
154 | |
155 | } |
156 | |
157 | else |
158 | { |
159 | |
160 | char s [64]; |
161 | |
162 | int offset = OffsetMinutes (); |
163 | |
164 | if (offset > 0) |
165 | { |
166 | |
167 | sprintf (s, "+%02d:%02d" , offset / 60, offset % 60); |
168 | |
169 | } |
170 | |
171 | else |
172 | { |
173 | |
174 | offset = -offset; |
175 | |
176 | sprintf (s, "-%02d:%02d" , offset / 60, offset % 60); |
177 | |
178 | } |
179 | |
180 | result.Set (s); |
181 | |
182 | } |
183 | |
184 | } |
185 | |
186 | return result; |
187 | |
188 | } |
189 | |
190 | /*****************************************************************************/ |
191 | |
192 | dng_date_time_info::dng_date_time_info () |
193 | |
194 | : fDateOnly (true) |
195 | , fDateTime () |
196 | , fSubseconds () |
197 | , fTimeZone () |
198 | |
199 | { |
200 | |
201 | } |
202 | |
203 | /*****************************************************************************/ |
204 | |
205 | bool dng_date_time_info::IsValid () const |
206 | { |
207 | |
208 | return fDateTime.IsValid (); |
209 | |
210 | } |
211 | |
212 | /*****************************************************************************/ |
213 | |
214 | void dng_date_time_info::SetDate (uint32 year, |
215 | uint32 month, |
216 | uint32 day) |
217 | { |
218 | |
219 | fDateTime.fYear = year; |
220 | fDateTime.fMonth = month; |
221 | fDateTime.fDay = day; |
222 | |
223 | } |
224 | |
225 | /*****************************************************************************/ |
226 | |
227 | void dng_date_time_info::SetTime (uint32 hour, |
228 | uint32 minute, |
229 | uint32 second) |
230 | { |
231 | |
232 | fDateOnly = false; |
233 | |
234 | fDateTime.fHour = hour; |
235 | fDateTime.fMinute = minute; |
236 | fDateTime.fSecond = second; |
237 | |
238 | } |
239 | |
240 | /*****************************************************************************/ |
241 | |
242 | void dng_date_time_info::Decode_ISO_8601 (const char *s) |
243 | { |
244 | |
245 | Clear (); |
246 | |
247 | uint32 len = (uint32) strlen (s); |
248 | |
249 | if (!len) |
250 | { |
251 | return; |
252 | } |
253 | |
254 | unsigned year = 0; |
255 | unsigned month = 0; |
256 | unsigned day = 0; |
257 | |
258 | if (sscanf (s, |
259 | "%u-%u-%u" , |
260 | &year, |
261 | &month, |
262 | &day) != 3) |
263 | { |
264 | return; |
265 | } |
266 | |
267 | SetDate ((uint32) year, |
268 | (uint32) month, |
269 | (uint32) day); |
270 | |
271 | if (fDateTime.NotValid ()) |
272 | { |
273 | Clear (); |
274 | return; |
275 | } |
276 | |
277 | for (uint32 j = 0; j < len; j++) |
278 | { |
279 | |
280 | if (s [j] == 'T') |
281 | { |
282 | |
283 | unsigned hour = 0; |
284 | unsigned minute = 0; |
285 | unsigned second = 0; |
286 | |
287 | int items = sscanf (s + j + 1, |
288 | "%u:%u:%u" , |
289 | &hour, |
290 | &minute, |
291 | &second); |
292 | |
293 | if (items >= 2 && items <= 3) |
294 | { |
295 | |
296 | SetTime ((uint32) hour, |
297 | (uint32) minute, |
298 | (uint32) second); |
299 | |
300 | if (fDateTime.NotValid ()) |
301 | { |
302 | Clear (); |
303 | return; |
304 | } |
305 | |
306 | if (items == 3) |
307 | { |
308 | |
309 | for (uint32 k = j + 1; k < len; k++) |
310 | { |
311 | |
312 | if (s [k] == '.') |
313 | { |
314 | |
315 | while (++k < len && s [k] >= '0' && s [k] <= '9') |
316 | { |
317 | |
318 | char ss [2]; |
319 | |
320 | ss [0] = s [k]; |
321 | ss [1] = 0; |
322 | |
323 | fSubseconds.Append (ss); |
324 | |
325 | } |
326 | |
327 | break; |
328 | |
329 | } |
330 | |
331 | } |
332 | |
333 | } |
334 | |
335 | for (uint32 k = j + 1; k < len; k++) |
336 | { |
337 | |
338 | if (s [k] == 'Z') |
339 | { |
340 | |
341 | fTimeZone.SetOffsetMinutes (0); |
342 | |
343 | break; |
344 | |
345 | } |
346 | |
347 | if (s [k] == '+' || s [k] == '-') |
348 | { |
349 | |
350 | int32 sign = (s [k] == '-' ? -1 : 1); |
351 | |
352 | unsigned tzhour = 0; |
353 | unsigned tzmin = 0; |
354 | |
355 | if (sscanf (s + k + 1, |
356 | "%u:%u" , |
357 | &tzhour, |
358 | &tzmin) > 0) |
359 | { |
360 | |
361 | fTimeZone.SetOffsetMinutes (sign * (tzhour * 60 + tzmin)); |
362 | |
363 | } |
364 | |
365 | break; |
366 | |
367 | } |
368 | |
369 | } |
370 | |
371 | } |
372 | |
373 | break; |
374 | |
375 | } |
376 | |
377 | } |
378 | |
379 | } |
380 | |
381 | /*****************************************************************************/ |
382 | |
383 | dng_string dng_date_time_info::Encode_ISO_8601 () const |
384 | { |
385 | |
386 | dng_string result; |
387 | |
388 | if (IsValid ()) |
389 | { |
390 | |
391 | char s [256]; |
392 | |
393 | sprintf (s, |
394 | "%04u-%02u-%02u" , |
395 | (unsigned) fDateTime.fYear, |
396 | (unsigned) fDateTime.fMonth, |
397 | (unsigned) fDateTime.fDay); |
398 | |
399 | result.Set (s); |
400 | |
401 | if (!fDateOnly) |
402 | { |
403 | |
404 | sprintf (s, |
405 | "T%02u:%02u:%02u" , |
406 | (unsigned) fDateTime.fHour, |
407 | (unsigned) fDateTime.fMinute, |
408 | (unsigned) fDateTime.fSecond); |
409 | |
410 | result.Append (s); |
411 | |
412 | if (fSubseconds.NotEmpty ()) |
413 | { |
414 | |
415 | bool subsecondsValid = true; |
416 | |
417 | uint32 len = fSubseconds.Length (); |
418 | |
419 | for (uint32 index = 0; index < len; index++) |
420 | { |
421 | |
422 | if (fSubseconds.Get () [index] < '0' || |
423 | fSubseconds.Get () [index] > '9') |
424 | { |
425 | subsecondsValid = false; |
426 | break; |
427 | } |
428 | |
429 | } |
430 | |
431 | if (subsecondsValid) |
432 | { |
433 | result.Append ("." ); |
434 | result.Append (fSubseconds.Get ()); |
435 | } |
436 | |
437 | } |
438 | |
439 | if (gDNGUseFakeTimeZonesInXMP) |
440 | { |
441 | |
442 | // Kludge: Early versions of the XMP toolkit assume Zulu time |
443 | // if the time zone is missing. It is safer for fill in the |
444 | // local time zone. |
445 | |
446 | dng_time_zone tempZone = fTimeZone; |
447 | |
448 | if (tempZone.NotValid ()) |
449 | { |
450 | tempZone = LocalTimeZone (fDateTime); |
451 | } |
452 | |
453 | result.Append (tempZone.Encode_ISO_8601 ().Get ()); |
454 | |
455 | } |
456 | |
457 | else |
458 | { |
459 | |
460 | // MWG: Now we don't fill in the local time zone. So only |
461 | // add the time zone if it is known and valid. |
462 | |
463 | if (fTimeZone.IsValid ()) |
464 | { |
465 | result.Append (fTimeZone.Encode_ISO_8601 ().Get ()); |
466 | } |
467 | |
468 | } |
469 | |
470 | } |
471 | |
472 | } |
473 | |
474 | return result; |
475 | |
476 | } |
477 | |
478 | /*****************************************************************************/ |
479 | |
480 | void dng_date_time_info::Decode_IPTC_Date (const char *s) |
481 | { |
482 | |
483 | if (strlen (s) == 8) |
484 | { |
485 | |
486 | unsigned year = 0; |
487 | unsigned month = 0; |
488 | unsigned day = 0; |
489 | |
490 | if (sscanf (s, |
491 | "%4u%2u%2u" , |
492 | &year, |
493 | &month, |
494 | &day) == 3) |
495 | { |
496 | |
497 | SetDate ((uint32) year, |
498 | (uint32) month, |
499 | (uint32) day); |
500 | |
501 | } |
502 | |
503 | } |
504 | |
505 | } |
506 | |
507 | /*****************************************************************************/ |
508 | |
509 | dng_string dng_date_time_info::Encode_IPTC_Date () const |
510 | { |
511 | |
512 | dng_string result; |
513 | |
514 | if (IsValid ()) |
515 | { |
516 | |
517 | char s [64]; |
518 | |
519 | sprintf (s, |
520 | "%04u%02u%02u" , |
521 | (unsigned) fDateTime.fYear, |
522 | (unsigned) fDateTime.fMonth, |
523 | (unsigned) fDateTime.fDay); |
524 | |
525 | result.Set (s); |
526 | |
527 | } |
528 | |
529 | return result; |
530 | |
531 | } |
532 | |
533 | /*****************************************************************************/ |
534 | |
535 | void dng_date_time_info::Decode_IPTC_Time (const char *s) |
536 | { |
537 | |
538 | if (strlen (s) == 11) |
539 | { |
540 | |
541 | char time [12]; |
542 | |
543 | memcpy (time, s, sizeof (time)); |
544 | |
545 | if (time [6] == '+' || |
546 | time [6] == '-') |
547 | { |
548 | |
549 | int tzsign = (time [6] == '-') ? -1 : 1; |
550 | |
551 | time [6] = 0; |
552 | |
553 | unsigned hour = 0; |
554 | unsigned minute = 0; |
555 | unsigned second = 0; |
556 | unsigned tzhour = 0; |
557 | unsigned tzmin = 0; |
558 | |
559 | if (sscanf (time, |
560 | "%2u%2u%2u" , |
561 | &hour, |
562 | &minute, |
563 | &second) == 3 && |
564 | sscanf (time + 7, |
565 | "%2u%2u" , |
566 | &tzhour, |
567 | &tzmin) == 2) |
568 | { |
569 | |
570 | dng_time_zone zone; |
571 | |
572 | zone.SetOffsetMinutes (tzsign * (tzhour * 60 + tzmin)); |
573 | |
574 | if (zone.IsValid ()) |
575 | { |
576 | |
577 | SetTime ((uint32) hour, |
578 | (uint32) minute, |
579 | (uint32) second); |
580 | |
581 | SetZone (zone); |
582 | |
583 | } |
584 | |
585 | } |
586 | |
587 | } |
588 | |
589 | } |
590 | |
591 | else if (strlen (s) == 6) |
592 | { |
593 | |
594 | unsigned hour = 0; |
595 | unsigned minute = 0; |
596 | unsigned second = 0; |
597 | |
598 | if (sscanf (s, |
599 | "%2u%2u%2u" , |
600 | &hour, |
601 | &minute, |
602 | &second) == 3) |
603 | { |
604 | |
605 | SetTime ((uint32) hour, |
606 | (uint32) minute, |
607 | (uint32) second); |
608 | |
609 | } |
610 | |
611 | } |
612 | |
613 | else if (strlen (s) == 4) |
614 | { |
615 | |
616 | unsigned hour = 0; |
617 | unsigned minute = 0; |
618 | |
619 | if (sscanf (s, |
620 | "%2u%2u" , |
621 | &hour, |
622 | &minute) == 2) |
623 | { |
624 | |
625 | SetTime ((uint32) hour, |
626 | (uint32) minute, |
627 | 0); |
628 | |
629 | } |
630 | |
631 | } |
632 | |
633 | } |
634 | |
635 | /*****************************************************************************/ |
636 | |
637 | dng_string dng_date_time_info::Encode_IPTC_Time () const |
638 | { |
639 | |
640 | dng_string result; |
641 | |
642 | if (IsValid () && !fDateOnly) |
643 | { |
644 | |
645 | char s [64]; |
646 | |
647 | if (fTimeZone.IsValid ()) |
648 | { |
649 | |
650 | sprintf (s, |
651 | "%02u%02u%02u%c%02u%02u" , |
652 | (unsigned) fDateTime.fHour, |
653 | (unsigned) fDateTime.fMinute, |
654 | (unsigned) fDateTime.fSecond, |
655 | (int) (fTimeZone.OffsetMinutes () >= 0 ? '+' : '-'), |
656 | (unsigned) (Abs_int32 (fTimeZone.OffsetMinutes ()) / 60), |
657 | (unsigned) (Abs_int32 (fTimeZone.OffsetMinutes ()) % 60)); |
658 | |
659 | } |
660 | |
661 | else |
662 | { |
663 | |
664 | sprintf (s, |
665 | "%02u%02u%02u" , |
666 | (unsigned) fDateTime.fHour, |
667 | (unsigned) fDateTime.fMinute, |
668 | (unsigned) fDateTime.fSecond); |
669 | |
670 | } |
671 | |
672 | result.Set (s); |
673 | |
674 | } |
675 | |
676 | return result; |
677 | |
678 | } |
679 | |
680 | /*****************************************************************************/ |
681 | |
682 | static dng_mutex gDateTimeMutex ("gDateTimeMutex" ); |
683 | |
684 | /*****************************************************************************/ |
685 | |
686 | void CurrentDateTimeAndZone (dng_date_time_info &info) |
687 | { |
688 | |
689 | time_t sec; |
690 | |
691 | time (&sec); |
692 | |
693 | tm t; |
694 | tm zt; |
695 | |
696 | { |
697 | |
698 | dng_lock_mutex lock (&gDateTimeMutex); |
699 | |
700 | t = *localtime (&sec); |
701 | zt = *gmtime (&sec); |
702 | |
703 | } |
704 | |
705 | dng_date_time dt; |
706 | |
707 | dt.fYear = t.tm_year + 1900; |
708 | dt.fMonth = t.tm_mon + 1; |
709 | dt.fDay = t.tm_mday; |
710 | dt.fHour = t.tm_hour; |
711 | dt.fMinute = t.tm_min; |
712 | dt.fSecond = t.tm_sec; |
713 | |
714 | info.SetDateTime (dt); |
715 | |
716 | int tzHour = t.tm_hour - zt.tm_hour; |
717 | int tzMin = t.tm_min - zt.tm_min; |
718 | |
719 | bool zonePositive = (t.tm_year > zt.tm_year) || |
720 | (t.tm_year == zt.tm_year && t.tm_yday > zt.tm_yday) || |
721 | (t.tm_year == zt.tm_year && t.tm_yday == zt.tm_yday && tzHour > 0) || |
722 | (t.tm_year == zt.tm_year && t.tm_yday == zt.tm_yday && tzHour == 0 && tzMin >= 0); |
723 | |
724 | tzMin += tzHour * 60; |
725 | |
726 | if (zonePositive) |
727 | { |
728 | |
729 | while (tzMin < 0) |
730 | tzMin += 24 * 60; |
731 | |
732 | } |
733 | |
734 | else |
735 | { |
736 | |
737 | while (tzMin > 0) |
738 | tzMin -= 24 * 60; |
739 | |
740 | } |
741 | |
742 | dng_time_zone zone; |
743 | |
744 | zone.SetOffsetMinutes (tzMin); |
745 | |
746 | info.SetZone (zone); |
747 | |
748 | } |
749 | |
750 | /*****************************************************************************/ |
751 | |
752 | void DecodeUnixTime (uint32 unixTime, dng_date_time &dt) |
753 | { |
754 | |
755 | time_t sec = (time_t) unixTime; |
756 | |
757 | tm t; |
758 | |
759 | { |
760 | |
761 | dng_lock_mutex lock (&gDateTimeMutex); |
762 | |
763 | #if qMacOS && !defined(__MACH__) |
764 | |
765 | // Macintosh CFM stores time in local time zone. |
766 | |
767 | tm *tp = localtime (&sec); |
768 | |
769 | #else |
770 | |
771 | // Macintosh Mach-O and Windows stores time in Zulu time. |
772 | |
773 | tm *tp = gmtime (&sec); |
774 | |
775 | #endif |
776 | |
777 | if (!tp) |
778 | { |
779 | dt.Clear (); |
780 | return; |
781 | } |
782 | |
783 | t = *tp; |
784 | |
785 | } |
786 | |
787 | dt.fYear = t.tm_year + 1900; |
788 | dt.fMonth = t.tm_mon + 1; |
789 | dt.fDay = t.tm_mday; |
790 | dt.fHour = t.tm_hour; |
791 | dt.fMinute = t.tm_min; |
792 | dt.fSecond = t.tm_sec; |
793 | |
794 | } |
795 | |
796 | /*****************************************************************************/ |
797 | |
798 | dng_time_zone LocalTimeZone (const dng_date_time &dt) |
799 | { |
800 | |
801 | dng_time_zone result; |
802 | |
803 | if (dt.IsValid ()) |
804 | { |
805 | |
806 | #if qMacOS |
807 | |
808 | CFTimeZoneRef zoneRef = CFTimeZoneCopyDefault (); |
809 | |
810 | if (zoneRef) |
811 | { |
812 | |
813 | CFGregorianDate gregDate; |
814 | |
815 | gregDate.year = dt.fYear; |
816 | gregDate.month = (SInt8) dt.fMonth; |
817 | gregDate.day = (SInt8) dt.fDay; |
818 | gregDate.hour = (SInt8) dt.fHour; |
819 | gregDate.minute = (SInt8) dt.fMinute; |
820 | gregDate.second = (SInt8) dt.fSecond; |
821 | |
822 | CFAbsoluteTime absTime = CFGregorianDateGetAbsoluteTime (gregDate, zoneRef); |
823 | |
824 | CFTimeInterval secondsDelta = CFTimeZoneGetSecondsFromGMT (zoneRef, absTime); |
825 | |
826 | CFRelease (zoneRef); |
827 | |
828 | result.SetOffsetSeconds (Round_int32 (secondsDelta)); |
829 | |
830 | if (result.IsValid ()) |
831 | { |
832 | return result; |
833 | } |
834 | |
835 | } |
836 | |
837 | #endif |
838 | |
839 | #if qWinOS |
840 | |
841 | if (GetTimeZoneInformation != NULL && |
842 | SystemTimeToTzSpecificLocalTime != NULL && |
843 | SystemTimeToFileTime != NULL) |
844 | { |
845 | |
846 | TIME_ZONE_INFORMATION tzInfo; |
847 | |
848 | DWORD x = GetTimeZoneInformation (&tzInfo); |
849 | |
850 | SYSTEMTIME localST; |
851 | |
852 | memset (&localST, 0, sizeof (localST)); |
853 | |
854 | localST.wYear = (WORD) dt.fYear; |
855 | localST.wMonth = (WORD) dt.fMonth; |
856 | localST.wDay = (WORD) dt.fDay; |
857 | localST.wHour = (WORD) dt.fHour; |
858 | localST.wMinute = (WORD) dt.fMinute; |
859 | localST.wSecond = (WORD) dt.fSecond; |
860 | |
861 | SYSTEMTIME utcST; |
862 | |
863 | if (TzSpecificLocalTimeToSystemTime (&tzInfo, &localST, &utcST)) |
864 | { |
865 | |
866 | FILETIME localFT; |
867 | FILETIME utcFT; |
868 | |
869 | (void) SystemTimeToFileTime (&localST, &localFT); |
870 | (void) SystemTimeToFileTime (&utcST , &utcFT ); |
871 | |
872 | uint64 time1 = (((uint64) localFT.dwHighDateTime) << 32) + localFT.dwLowDateTime; |
873 | uint64 time2 = (((uint64) utcFT .dwHighDateTime) << 32) + utcFT .dwLowDateTime; |
874 | |
875 | // FILETIMEs are in units to 100 ns. Convert to seconds. |
876 | |
877 | int64 time1Sec = time1 / 10000000; |
878 | int64 time2Sec = time2 / 10000000; |
879 | |
880 | int32 delta = (int32) (time1Sec - time2Sec); |
881 | |
882 | result.SetOffsetSeconds (delta); |
883 | |
884 | if (result.IsValid ()) |
885 | { |
886 | return result; |
887 | } |
888 | |
889 | } |
890 | |
891 | } |
892 | |
893 | #endif |
894 | |
895 | } |
896 | |
897 | // Figure out local time zone. |
898 | |
899 | dng_date_time_info current_info; |
900 | |
901 | CurrentDateTimeAndZone (current_info); |
902 | |
903 | result = current_info.TimeZone (); |
904 | |
905 | return result; |
906 | |
907 | } |
908 | |
909 | /*****************************************************************************/ |
910 | |
911 | dng_date_time_storage_info::dng_date_time_storage_info () |
912 | |
913 | : fOffset (kDNGStreamInvalidOffset ) |
914 | , fFormat (dng_date_time_format_unknown) |
915 | |
916 | { |
917 | |
918 | } |
919 | |
920 | /*****************************************************************************/ |
921 | |
922 | dng_date_time_storage_info::dng_date_time_storage_info (uint64 offset, |
923 | dng_date_time_format format) |
924 | |
925 | : fOffset (offset) |
926 | , fFormat (format) |
927 | |
928 | { |
929 | |
930 | } |
931 | |
932 | /*****************************************************************************/ |
933 | |
934 | bool dng_date_time_storage_info::IsValid () const |
935 | { |
936 | |
937 | return fOffset != kDNGStreamInvalidOffset; |
938 | |
939 | } |
940 | |
941 | /*****************************************************************************/ |
942 | |
943 | uint64 dng_date_time_storage_info::Offset () const |
944 | { |
945 | |
946 | if (!IsValid ()) |
947 | ThrowProgramError (); |
948 | |
949 | return fOffset; |
950 | |
951 | } |
952 | |
953 | /*****************************************************************************/ |
954 | |
955 | dng_date_time_format dng_date_time_storage_info::Format () const |
956 | { |
957 | |
958 | if (!IsValid ()) |
959 | ThrowProgramError (); |
960 | |
961 | return fFormat; |
962 | |
963 | } |
964 | |
965 | /*****************************************************************************/ |
966 | |