On Tuesday, 21 July 2020 at 11:01:20 UTC, drug wrote:
On 7/20/20 10:04 PM, Ecstatic Coder wrote:
I'm currently implementing a small open source backup tool
(dub), and therefore I need to accurately store the file
modification SysTime in binary format, so that I can later
load this SysTime from the snapshot file to compare it with
the current file modification SysTime.
Having unfortunately not understood how to do this from the
SysTime documentation, in despair, I've tried to directly
serialize the 16 bytes of the SysTime value. This worked fine
until I call the ".toISOString()" on the deserialized SysTime,
which inevitably crashes the executable ;)
That is probably a bug. I serialize SysTime as long by means
msgpack for exchanging between C++ client and D server and it
works pretty nice.
Anyway, that's not really want I intended to do, as in
practice a "ulong" already has enough resolution for that
purpose.
So sorry for my ignorance, but I would definitely need some
help on how to :
- convert a file modification SysTime to a serializable
number, for instance the number of hectonanoseconds since
1/1/1970 in UTC;
- convert that number back into a SysTime that I can compare
to the modification SysTime of the same file.
Eric
Ah thanks for telling me :)
The loaded byte array in the union type was indeed the same as
the saved one, so I immediately thought it was crashing because
of some hidden pointer for timezone or something which was then
pointing to garbage at reloading, causing the crash of the
".toISOString" call.
