How get sub partition from QBtyeArray of Hex
I have a hex data like below:
this is just example, the real data is vary long
and I want to get interval FFD8 ... FFD9 , and How I to do it .
QString str = "4200A0DFFD8FFE000104A4649FFD900000"; QByteArray myHexArray = QByteArray::fromHex(str.toUtf8()); //QByteArray head = QByteArray::fromHex("FFD8"); QByteArray head("FFD8"); QByteArray tail = QByteArray::fromHex("FFD9"); QByteArray realHexData; //realHexData.resize(); ui->plainTextEdit->setPlainText(QString::number(myHexArray.indexOf(head)));
My goal is realHexData content is below , and it hex data
realHexData = "FFD8FFE000104A4649FFD9";
How can I do better?
I just think QByteArray::indexOf, but it's not work :(
has another one have better method for me
thank you very much
hi dear mrjj
yes, I use the QByteArray::mid API solved my problem finally
at first , I not get the head and tail index, but now it's can work, I can get the index
the key point like this:
realHexData = myHexArray.mid(ihead,itail-ihead+2);