u_char* to QDataStream and readDouble() in the stream

zwokaros

Hello

I'm trying to parse TCP Packets that comes in the form of u_char*

But I haven't found a way to do it

What I'm looking for is the same behavior as stream.readDouble() in c# so that I can parse different values from the packets without iterating through the u_char*

To be more specific I'll give an example of the data I want to parse

This is the packet with like multiple values in it [int][utf text][double][u_short]

And I want something like

int i = stream.readInt();
char *text = stream.readUTF8();
double number = stream.readDouble();
u_short tinyNumber = stream.readUShort();

Is this possible?

jsulm

@zwokaros Take a look at http://doc.qt.io/qt-5/qdatastream.html
What type is stream?
Assuming stream is QDataStream:

int i;
QString text;
double number;
u_short tinyNumber;
stream >> i >> text >> number >> tinyNumber;

SGaist

Hi,

Out of curiosity, where are these packets coming from ?

VRonin

You can use @jsulm solution for all the types* apart for the text. You need to tell us how you can determine when the text finishes. Is it null terminated? does it have a header that tells you the size?

* You should be careful with endianness but since you are saying it comes from TCP it's fair to assume the usual Big-Endian convention