Hi folks,

I found two bugs in Pavel Minayev's "socket.d", which is, I believe, a great module to play with if you need TCP/IP in your apps. I'm posting an updated version of it along with a slightly modified version of Pavel's sample program. Is there a better place to send files to, so that everybody can access them?

The first bug was due to the fact that you can't instantiate an object from a class which has, somewhere in it's ancestry, an abstract method left undefined. The TCPSocket class inherits from the StreamSocket class which inherits from the Stream class which has three abstract methods. One of these, seek(), was left undefined in the sub-classes. I just defined a dummy seek() method in StreamSocket to circumvent the problem. Should it be done otherwise?

The second bug concerned the initialization of an IP address (within the IP class) using a hostname. It was broken because it didn't use correctly the data structure returned by gethostbyname(). A char** has to be dereferenced twice...

Not bad for a newbie, uh? I think I'm going to love D.


Thanks to Lars Ivar Igesund for his hint regarding abstract classes.

Christian Lesage

> One of
> these, seek(), was left undefined in the sub-classes. I just defined a dummy
> seek() method in StreamSocket to circumvent the problem. Should it be done
> otherwise?
> 
> The second bug concerned the initialization of an IP address (within the IP
> class) using a hostname. It was broken because it didn't use correctly the
> data structure returned by gethostbyname(). A char** has to be dereferenced
> twice...
> 

Bravo!  I was struggling with seek() a few weeks back.  I can't think of another way to do it, but I'll let you know how it works in my app...

Thanks,
Brad