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#ifndef DST_HACK_H_INCLUDED
#define DST_HACK_H_INCLUDED
#include "win.h" //includes "windows.h"
#include "zstring.h"
#include <stdexcept>
namespace dst
{
/*
Solve DST +-1h and time zone shift issues on FAT drives
-------------------------------------------------------
- (local) last write time is not touched!
- all additional metadata is encoded in local create time:
I. indicator that offset in II) is present
II. local<->UTC time offset
III. indicator that offset in II) corresponds to current local write time (a hash of local last write time)
*/
bool isFatDrive(const Zstring& fileName); //throw ()
//all subsequent functions may throw the std::runtime_error exception!
struct RawTime //time as retrieved by ::FindFirstFile() and ::GetFileAttributesEx()
{
RawTime(const FILETIME& create, const FILETIME& lastWrite) : createTimeRaw(create), writeTimeRaw(lastWrite) {}
FILETIME createTimeRaw;
FILETIME writeTimeRaw;
};
//save UTC time resistant against DST/time zone shifts
bool fatHasUtcEncoded(const RawTime& rawTime); //throw std::runtime_error; as retrieved by ::FindFirstFile() and ::GetFileAttributesEx()
RawTime fatEncodeUtcTime(const FILETIME& writeTimeRealUtc); //throw std::runtime_error
FILETIME fatDecodeUtcTime(const RawTime& rawTime); //throw std::runtime_error; return last write time in real UTC
}
#endif // DST_HACK_H_INCLUDED
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