Convert 0xAABBCCDD to QString DDCCBBAA

pVit

Hello,
I need to convert for example from int 0xAABBCCDD to QString DDCCBBAA. I think it's any function of QByteArray but I can't find more.

I have this code, but It doesn't work properly, output is last two letters.

#define NUMBER           0xAAFC

    QByteArray array;
    array.append(NUMBER);

    qDebug() << QString(array.toHex());

Thanks for help, byte actions aren't my friends.

VRonin

The fact that you used symmetric bytes (e.g. AA instead of A1) makes it somewhat ambiguous. See if this suits you

QString hexString = QString::number(0xA1B2C3D4,16);
std::reverse(hexString.begin(),hexString.end());

this will produce 4D3C2B1A

if you wanted D4C3B2A1 instead you can indeed use bitshift:

QString hexString;
for(auto number = 0xA1B2C3D4;number;number >>=8)
hexString.append(QString::number(number & 0xFF,16));

Fixed error in code

Seenu

QString hexString = QString::number(0xAABBCCDD,16);
std::reverse(hexString.begin(),hexString.end());

works fine to have upper case
add
QString s = hexString.toUpper();
you will get string in upper case

pVit

@VRonin
Thanks a lot. I only fixed number >>=1 to number >>=8 for correct function. Now it works as I need.

VRonin

I only fixed number >>=1 to number >>=8

Yep, sorry you are correct, I was thinking in bytes for some reason. Need more ☕