Question

I’ve got a type BYTE which is defined in the windows.h header as follows:

    typedef unsigned char BYTE;

Then I’ve got some fields on a database which I get as QString and convert them to a QByteArray.

Currently I have:

        QString str = "0x168de78"; //some info from the database

        QByteArray tempB = QByteArray::fromHex(str.toAscii().toHex());

        BYTE *sequence = (BYTE*)strdup(tempB.data());

In this case the “0x168de78” stands for a sample of the information I am expecting to get from the database.

I need to convert the QString literally to a BYTE so I can later use it.

If I tell the app to give me the values of sequence and tempB.data(), I get something similar to this:

0x867dc8 "0x168de78" 
0x867de0 "0x168de78" 
0x867df8 "0x168de78" 

So tempB.data() is alright, but sequence is not. What am I doing wrong?

Answer 1

QString str = "0x168de78"; //some info from the database

QByteArray tempB =  QByteArray::fromHex(str.toAscii());//or 
//QByteArray tempB =  str.toAscii().toHex();

BYTE *sequence = (BYTE*)strdup(tempB.data());

Update: If u can use STL

unsigned int value;   
std::stringstream ss;
ss << std::hex << "0x168de78";
ss >> x;