[Qt-interest] QDataStream writing a quint32 twice

[Rohan Prabhu]

This is a rather strange problem I'm facing. Have a look at this code:

QDataStream out(&block, QIODevice::WriteOnly);
QString newString("Hello.World.This.is.the.message");
QByteArray newByte = newString.toAscii();

//Send to stream the magic words
out<<(quint8)'x';
out<<(quint8)0x37;
out<<(quint8)0x4B;

//Send to stream the version numbers
out<<(quint8)0x00;
out<<(quint8)0x01;

//Send to stream the size of the request
[LINE] out<<(quint32)((newString.toAscii()).size());

//Send to stream the data
out<<newString.toAscii();

std::cout<<std::endl;

Now, the contents of the QByteArray 'block' are:

0x78 0x37 0x4b 0x0 0x1 *0x0 0x0 0x0 0x1f 0x0
0x0 0x0 0x1f* 0x48 0x65 0x6c 0x6c 0x6f 0x2e 0x57
0x6f 0x72 0x6c 0x64 0x2e 0x54 0x68 0x69 0x73 0x2e
0x69 0x73 0x2e 0x74 0x68 0x65 0x2e 0x6d 0x65 0x73
0x73 0x61 0x67 0x65

The bold and underlined text is the 'size' variable, the line of output is
mentioned by the prefix [LINE] in the code. The size of the string is 31
bytes [which is 0x1F bytes]. And 0x48, 0x65 and 0x6C are the hex codes for
'H', 'e' and 'l' respectively. So, basically, it is clear that the size
variable is being written twice. Now I dont quite understand why. I made the
variable newByte to test and found out it's contents. The contents started
at 0x48 0x65 and so on.. So basically, the ByteArray construction is proper
via QString::toAscii(), but for some reason, the size variable is being
inserted twice.

Any help would be appreciated,
Regards,
Rohan Prabhu
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