Maximum value for unsigned int ?

[Selzig]

Hello,

qDebug() << QString::number(std::numeric_limits<unsigned int>::max());

return 4294967295 with my mac OS X[64 bits]. Is it the same for all target platforms of Qt ?
In other words, can is it the same value with windows 32&64, linux 32&64, ios, android ? I guess so, but I prefer to check with you ?
Thanks. Regards. Gilles

[J.Hilk]

hi @Selzig ,

sadly you can not, the standard int may have 2 or 4 bytes depending on the platform/compiler used.

but you can ensure, that it is 4 bytes, by using int32_t or qint32

[Selzig]

@J.Hilk said in Maximum value for unsigned int ?:

sadly you can not, the standard int may have 2 or 4 bytes depending on the platform/compiler used.
but you can ensure, that it is 4 bytes, by using int32_t or qint32Hello,

Thank you for your reply. Could you clarify me in which case is it 2 bytes on the platforms mentioned ?
Thanks. Gilles

[VRonin]

Actually, as I discovered with surprise, Qt only supports systems where int is 4 bytes so yes, that result is guaranteed.

The difference between 64 and 32 bits versions is the definition of qintptr

[J.Hilk]

@VRonin said in Maximum value for unsigned int ?:

Actually, as I discovered with surprise Qt only supports systems where int is 4 bytes so yes, that result is guaranteed.

Look at that, you learn something new every day 😲!

[Selzig]

Thank you both for this informations.
Regards. Gilles