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comparison defical-c/src/msvc/gettimeofday.c @ 0:ebed2bd0d300

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Initial import from svn. History be damned.
author Edho P. Arief <me@myconan.net>
date Fri, 02 Apr 2010 23:11:57 +0700
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-1:000000000000 0:ebed2bd0d300
1 #include <time.h>
2 #include <windows.h>
3
4 #if defined(_MSC_VER) || defined(_MSC_EXTENSIONS)
5 #define DELTA_EPOCH_IN_MICROSECS 11644473600000000Ui64
6 #else
7 #define DELTA_EPOCH_IN_MICROSECS 11644473600000000ULL
8 #endif
9
10 struct timezone
11 {
12 int tz_minuteswest; /* minutes W of Greenwich */
13 int tz_dsttime; /* type of dst correction */
14 };
15
16 int gettimeofday(struct timeval *tv, struct timezone *tz)
17 {
18 FILETIME ft;
19 unsigned __int64 tmpres = 0;
20 static int tzflag = 0;
21
22 if (NULL != tv)
23 {
24 GetSystemTimeAsFileTime(&ft);
25
26 tmpres |= ft.dwHighDateTime;
27 tmpres <<= 32;
28 tmpres |= ft.dwLowDateTime;
29
30 tmpres /= 10; /*convert into microseconds*/
31 /*converting file time to unix epoch*/
32 tmpres -= DELTA_EPOCH_IN_MICROSECS;
33 tv->tv_sec = (long)(tmpres / 1000000UL);
34 tv->tv_usec = (long)(tmpres % 1000000UL);
35 }
36
37 if (NULL != tz)
38 {
39 if (!tzflag)
40 {
41 _tzset();
42 tzflag++;
43 }
44 tz->tz_minuteswest = _get_timezone(tz) / 60;
45 tz->tz_dsttime = _daylight;
46 }
47
48 return 0;
49 }
50
51