Converting FileTime to time_t on Windows
Author
I need some help figuring out how to get the time a file was last modified as a time_t on Windows. On Linux I use fstat. I'm not sure how to convert the results of GetFileTime to a time_t. Thanks in advance.
Brian Wood
http://webEbenezer.net
(651) 251-9384
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:
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;}
Author
Quote: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;}
Thanks for that. That seems to be working with two minor changes:
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; }Brian Wood
http://webEbenezer.net
(651) 251-9384
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