I have two QByteArray, sData and dData.
I want to copy n bytes from location x in dData i.e. &dData[x] to location y of sData i.e. &sData[y].
In C, array copy is done by memcpy(&dData[x], &sData[y], n);
How could copying above data of QByteArray be done in Qt?
Answer
From the Qt documentation, you can use the replace function: -
QByteArray & QByteArray::replace(int pos, int len, const QByteArray & after)
Replaces len bytes from index position pos with the byte array after, and returns a reference to this byte array.
So, using the overload
QByteArray & QByteArray::replace(int pos, int len, const char * after);
sData = sData.replace(y, nBytes, dData.constData()+x);