QByteArray toInt doesnt work

BartoszT

There is my code under debug.

Conversion to int doesn't work. I get 0 in the current_time variable but the conversion result is success (ok=0)
Compilation is correct.
Any sugestion?

koahnig

@BartoszT

What is CurrentDateTime?
Is this based on QDateTime?
If yes, you cannot simply convert it to int.

JonB

@BartoszT
Naturally we can assume QByteArray::toInt() does work, else there would be a whole lot of problems & complaints.

In what way is your QByteArray CurrentDataTime contents related to the number of seconds (since 1970) argument in QDateTime::fromTime_t(uint seconds)? (And while I think of it, are you compiling for 32-, not 64-bit?)

BartoszT

and has 4 bytes - it is 32bit time.

... but now i see that ok get a false as a result of conversion toInt.
So, why toInt doesnt watn to work whit this 4byte QByteArray?

JKSH

@BartoszT said in QByteArray toInt doesnt work:

So, why toInt doesnt watn to work whit this 4byte QByteArray?

Because your byte array does not contain ASCII text that represents an integer. See https://doc.qt.io/qt-5/qbytearray.html#toInt for an example on how to use QByteArray::toInt().

If you want to interpret 4 bytes as a 32-bit integer, use a reinterpret_cast:

int i = *reinterpret_cast<const int*>(myArray.constData());