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#ifdef _WIN32
#include "gettimeofday.h"

#if defined(_MSC_VER) || defined(_MSC_EXTENSIONS)
  #define DELTA_EPOCH_IN_MICROSECS  11644473600000000Ui64
#else
  #define DELTA_EPOCH_IN_MICROSECS  11644473600000000ULL
#endif
 
extern "C" QUBFAST_API int gettimeofday(struct timeval *tv, struct timezone *tz)
{
// Define a structure to receive the current Windows filetime
  FILETIME ft;
 
// Initialize the present time to 0 and the timezone to UTC
  unsigned __int64 tmpres = 0;
  static int tzflag = 0;
 
  if (NULL != tv)
  {
    GetSystemTimeAsFileTime(&ft);
 
// The GetSystemTimeAsFileTime returns the number of 100 nanosecond 
// intervals since Jan 1, 1601 in a structure. Copy the high bits to 
// the 64 bit tmpres, shift it left by 32 then or in the low 32 bits.
    tmpres |= ft.dwHighDateTime;
    tmpres <<= 32;
    tmpres |= ft.dwLowDateTime;
 
// Convert to microseconds by dividing by 10
    tmpres /= 10;
 
// The Unix epoch starts on Jan 1 1970.  Need to subtract the difference 
// in seconds from Jan 1 1601.
    tmpres -= DELTA_EPOCH_IN_MICROSECS;
 
// Finally change microseconds to seconds and place in the seconds value. 
// The modulus picks up the microseconds.
    tv->tv_sec = (long)(tmpres / 1000000UL);
    tv->tv_usec = (long)(tmpres % 1000000UL);
  }
 
  if (NULL != tz)
  {
    if (!tzflag)
    {
      _tzset();
      tzflag++;
    }
  
// Adjust for the timezone west of Greenwich
      tz->tz_minuteswest = _timezone / 60;
    tz->tz_dsttime = _daylight;
  }
 
  return 0;
}
    
#endif