[Qt-interest] How to get unicode data from socket?

[Sean Harmer]

On Thursday 14 January 2010 11:41:11 Bradley T. Hughes wrote:
> On 01/14/2010 12:26 PM, Sean Harmer wrote:
> > Hi,
> >
> > On Thursday 14 January 2010 11:20:00 Alex wrote:
> >> Hi,
> >>
> >>
> >> I have a program written in QT and it receives data via socket
> >> connection. The data format is:
> >> +--------------------+-----------------------+
> >> *| sizeOfData(4bytes) | Data (Unicode string) |*
> >> +--------------------+-----------------------+
> >> My questions are:
> >>
> >>     1. After I read the first 4 bytes data, I use memcpy() to
> >> get/convert the following data size. Does QT provide a convenient way to
> >> achieve this instead of memcpy()?
> >>     2. I use QTcpSocket.read(sizeOfData), which returns the QByteArray,
> >> to read the real data but I can't find a way to convert it to QString.
> >> How should I do?
> >
> > QString has a constructor that takes a QByteArray:
> >
> > http://doc.trolltech.com/4.6/qstring.html#QString-8
> 
> But this function is documented to convert using toAscii().
> 
> Depending on how the OPs string is encoded, you'll probably want to use
> fromUtf8(), fromUtf16(), or possibly the UTF-32 codec (iirc, there is one
>  in Qt, but I'm too lazy to look).
> 

True. I forgot the OP had unicode data (long day already). There are both 
fromUtf8() and fromUtf16() functions. The fromUtf8() one is even linked from 
the above section.

Sean