Converting FileTime to time_t on Windows

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Original post by cache_hit A FILETIME is the number of 100-nanosecond intervals since January 1, 1601. A time_t is the number of 1-second intervals since January 1, 1970. From there you can derive the following: time_t filetime_to_timet(const FILETIME& ft){ ULARGE_INTEGER ull; ull.LowPart = ft.LowPart; ull.HighPart = ft.HighPart; return ull.QuadPart / 10000000ULL - 11644473600ULL;}

  time_t  filetime_to_timet(FILETIME const& ft) const  {    ULARGE_INTEGER ull;    ull.LowPart = ft.dwLowDateTime;    ull.HighPart = ft.dwHighDateTime;    return ull.QuadPart / 10000000ULL - 11644473600ULL;  }