winquirks/sys/time.h

0001 #ifndef QUIRK_SYS_TIME_H
0002 #define QUIRK_SYS_TIME_H
0003
0004 #include <time.h>
0005 #include <windows.h>
0006 #include <WinSock2.h>
0007
0008 #if defined(_MSC_VER) || defined(_MSC_EXTENSIONS)
0009   #define DELTA_EPOCH_IN_MICROSECS  11644473600000000Ui64
0010 #else
0011   #define DELTA_EPOCH_IN_MICROSECS  11644473600000000ULL
0012 #endif
0013
0014 #ifndef _TIMEZONE_DEFINED /* Matches sys/time.h and mingw32/include/time.h */
0015 #define _TIMEZONE_DEFINED
0016 struct timezone
0017 {
0018   int  tz_minuteswest; /* minutes W of Greenwich */
0019   int  tz_dsttime;     /* type of dst correction */
0020 };
0021 #endif
0022
0023 static int
0024 gettimeofday(struct timeval * tv, struct timezone * tz)
0025 {
0026     FILETIME ft;
0027     unsigned __int64 tmpres = 0;
0028     static int tzflag;
0029
0030     if (NULL != tv)
0031     {
0032         GetSystemTimeAsFileTime(&ft);
0033
0034         tmpres |= ft.dwHighDateTime;
0035         tmpres <<= 32;
0036         tmpres |= ft.dwLowDateTime;
0037
0038         /*converting file time to unix epoch*/
0039         tmpres -= DELTA_EPOCH_IN_MICROSECS;
0040         tmpres /= 10;  /*convert into microseconds*/
0041         tv->tv_sec = (long)(tmpres / 1000000UL);
0042         tv->tv_usec = (long)(tmpres % 1000000UL);
0043     }
0044
0045     if (NULL != tz)
0046     {
0047         if (!tzflag)
0048         {
0049             _tzset();
0050             tzflag++;
0051         }
0052         tz->tz_minuteswest = _timezone / 60;
0053         tz->tz_dsttime = _daylight;
0054     }
0055
0056     return 0;
0057 }
0058 #endif