QByteArray overrides

[wysota]

You don't have to cast nor to use unions.
The scheme is:

QByteArray ba;
ba.resize(1000);
int x, y, z;
char *data = ba.data();
memcpy(data, &x, sizeof(x));
memcpy(data+sizeof(x), &y, sizeof(y));
memcpy(data+sizeof(x)+sizeof(y), &z, sizeof(z));

QByteArray ba;
ba.resize(1000);
int x, y, z;
char *data = ba.data();
memcpy(data, &x, sizeof(x));
memcpy(data+sizeof(x), &y, sizeof(y));
memcpy(data+sizeof(x)+sizeof(y), &z, sizeof(z));

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[squidge]

Thanks wysota, I didn't know whether or not accessing the internal data of a QByteArray was frowned upon or not, or could cause potential problems. I was also going to use append as it guarantees the space is available, and resizes if not, but I guess I can calculate the amount of space required by the quint32's at least (at the moment, I just over-estimate and 'reserve' the amount rather than a resize).