Unsolved Problem to convert datetime to time_t

[Stefanoxjx]

Hi, I've a problem and I don't understand if it is a bug.
I would like to convert QDateTime in time_t, but the result is always 4294967295 equivalent to 07 feb 2006 07:28.
If I work with date/time lower than 07 feb 2006 07:28 the conversion result is good.
I think that is a bug.

I use Qt Creator 4.1.0 Based on Qt 5.7.0 (GCC 4.9.1 20140922 (Red Hat 4.9.1-10), 64 bit) under Debian Jessie.

The code line that should convert date time in time_t is:

qDebug() << QDateTime(ui->editDTStart->dateTime()).toTime_t();

What do you think?

ManyThanks

Stefano

[ambershark]

@Stefanoxjx Worked fine for me... I used this code to test with qt 5.7 on linux:

#include <QDateTime>
#include <QDebug>

int main(int ac, char **av)
{
        QDateTime dt = QDateTime::currentDateTime();
        qDebug() << "date time is: " << dt.toTime_t();
        QDateTime dt2 = QDateTime::fromTime_t(dt.toTime_t());
        qDebug() << "dt2: " << dt2;
        return 0;
}

Output was as expected with the current local time and the converted time_t was correct with current local as well.

My guess is you are getting a bad value from your UI control. No bug that I can find in Qt's QDateTime.

[Stefanoxjx]

@ambershark
Hello @ambershark and thanks for your help.
I don't understand what appened, but the same code that did not work well, now it works fine.

Stefano

[ambershark]

@Stefanoxjx Oh that's good it is working now... You may just have had a dirty build and after a rebuild things were "fixed". :)