The problems is:
the code:
boost::local_time::local_date_time currentTime(
boost::posix_time::second_clock::local_time(),
boost::local_time::time_zone_ptr());
std::cout << currentTime.local_time() << std::endl;
the code:
tzset();
// the var tzname will have time zone names
// the var timezone will have the current offset
// the var daylight should show me if there is daylight "on"
but still I can't get local_date_time with the current time_zone... Does someone know, how to do it?
OK, as for now I still don't know the whole answer
but there is code, which could help to print the current time zone offset
(based on an answer for a related question here (stackoverflow) and some inner boost code)
I'm absolutely not sure it's will work correctly on all machines, but for now it's better than nothing:
boost::posix_time::time_duration getUtcOffset(const boost::posix_time::ptime& utcTime)
{
using boost::posix_time::ptime;
const ptime localTime = boost::date_time::c_local_adjustor<ptime>::utc_to_local(utcTime);
return localTime - utcTime;
}
std::wstring getUtcOffsetString(const boost::posix_time::ptime& utcTime)
{
const boost::posix_time::time_duration td = getUtcOffset(utcTime);
const wchar_t fillChar = L'0';
const wchar_t timeSeparator = L':';
std::wostringstream out;
out << (td.is_negative() ? L'-' : L'+');
out << std::setw(2) << std::setfill(fillChar)
<< boost::date_time::absolute_value(td.hours());
out << L':';
out << std::setw(2) << std::setfill(fillChar)
<< boost::date_time::absolute_value(td.minutes());
return out.str();
}
int main()
{
const boost::posix_time::ptime utcNow =
boost::posix_time::second_clock::universal_time();
const std::wstring curTimeOffset = getUtcOffsetString(utcNow);
std::wcout << curTimeOffset.c_str() << std::endl; // prints -05:00 on my comp
}