Add localtime - #55
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This makes a call to GetTimeZoneInformation in winapi/timezoneapi.h, offsets the time given by the output of GetTimeZoneInformation, passes it to gmtime, and returns the result from gmtime.
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This implementation calls
GetTimeZoneInformationfrom<winapi/timezoneapi.h>, offsets the time from the input by the output ofGetTimeZoneInformation, passes it togmtime, and returns the result fromgmtime.I have verified that it does work correctly if it can't get the timezone or daylight savings is disabled, if it is daylight savings, and if it is not daylight savings. It also returns
NULLifGetTimeZoneInformationreturnsTIME_ZONE_ID_INVALID.