2016-03-08 21:43 GMT+02:00 Thiago Macieira <thiago.macie...@intel.com>: > On terça-feira, 8 de março de 2016 21:27:52 PST Nikita Krupenko wrote: >> 2016-03-08 19:30 GMT+02:00 Thiago Macieira <thiago.macie...@intel.com>: >> > Indeed, but look at how you've combined two or more examples. You have a >> > byte array, you create a QDataStream on it, write some data, then you >> > used QDataStream to write that byte array to another byte array. You >> > probably didn't want that. >> >> It could be useful, if I want to write checksum of the data to the >> file. To do this, I can write >> some data to the QByteArray wrapped in QDataStream, then calculate >> checksum using >> qChecksum() (or QCriptographicHash) and then write byte array and >> checksum to the file. > > You could do that, but this is not what I was talking about. > > The problem was that Sina caused redundancy in the data: > > <32-bit value N+4> <32-bit value N/2> <string of length N/2> > > Do you see the redundancy? > > In your case, just make sure you don't use QDataStream to write the bytearray > that was check-summed, or you'll do the same as the above.
I mean, in general it could be useful. I agree, in the example of Sina it's just redundant. _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
