source/time/windows/rawtime.cpp

   1 #include "rawtime.h"
   2 #include "rawtime_private.h"
   3
   4 namespace {
   5
   6 /// Returns the unixtime epoch as filetime
   7 Msp::Time::RawTime get_epoch()
   8 {
   9         SYSTEMTIME st;
  10         st.wYear = 1970;
  11         st.wMonth = 1;
  12         st.wDay = 1;
  13         st.wHour = 0;
  14         st.wMinute = 0;
  15         st.wSecond = 0;
  16         st.wMilliseconds = 0;
  17
  18         FILETIME ft;
  19         SystemTimeToFileTime(&st, &ft);
  20         return (ft.dwLowDateTime+(static_cast<Msp::Time::RawTime>(ft.dwHighDateTime)<<32))/10;
  21 }
  22
  23 }
  24
  25 namespace Msp {
  26 namespace Time {
  27
  28 RawTime filetime_to_rawtime(const FILETIME &ft)
  29 {
  30         static RawTime epoch = get_epoch();
  31
  32         return (ft.dwLowDateTime+(static_cast<RawTime>(ft.dwHighDateTime)<<32))/10-epoch;
  33 }
  34
  35 } // namespace Time
  36 } // namespace Msp