win32port/win32helpers/gettimeofday.c

   1 #include <time.h>\r
   2 #include <windows.h> //I've omitted context line\r
   3 \r
   4 #include "gettimeofday.h"\r
   5 \r
   6 int gettimeofday(struct timeval *tv, struct timezone *tz)\r
   7 {\r
   8         FILETIME ft;\r
   9         unsigned __int64 tmpres = 0;\r
  10         static int tzflag;\r
  11 \r
  12         if (NULL != tv) {\r
  13                 GetSystemTimeAsFileTime(&ft);\r
  14 \r
  15                 tmpres |= ft.dwHighDateTime;\r
  16                 tmpres <<= 32;\r
  17                 tmpres |= ft.dwLowDateTime;\r
  18 \r
  19                 /*converting file time to unix epoch*/\r
  20                 tmpres /= 10;  /*convert into microseconds*/\r
  21                 tmpres -= DELTA_EPOCH_IN_MICROSECS;
  22                 tv->tv_sec = (long)(tmpres / 1000000UL);\r
  23                 tv->tv_usec = (long)(tmpres % 1000000UL);\r
  24         }\r
  25  \r
  26         if (NULL != tz) {\r
  27                 if (!tzflag) {\r
  28                         _tzset();\r
  29                         tzflag++;\r
  30                 }\r
  31                 tz->tz_minuteswest = _timezone / 60;\r
  32                 tz->tz_dsttime = _daylight;\r
  33         }\r
  34 \r
  35         return 0;\r
  36 }\r