How to convert a QByteArray to std::array<unsigned char, 33UL>?

Infinity

I use a library function which needs a std::array<unsigned char ,33UL> as a parameter.

How can I convert a QByteArray into a std::array<unsigned char ,33UL>?

Christian Ehrlicher

See https://en.cppreference.com/w/cpp/container/array on how to iterate over an std::array<> (see examples). Therefore you can also append the bytes to a QByteArray.

Infinity

Would that be a possible way to do it?

template<class T>
T ByteArrayToStdArray(const QByteArray &byteArray)
{
    T stdArray;

    //qDebug() << "std::array size" <<stdArray.size();

    for (unsigned int i = 0; i < stdArray.size() && i < (unsigned int) byteArray.size(); i++) {
        stdArray[i] = (unsigned char) byteArray.at(i);
    }

    return stdArray;
}

Christian Ehrlicher

Since it's a simply C array:

std::array<unsigned char ,33UL> myArray;
myArray[0] = 1;