Actually .deb files use the ar format.


Edit:
In C.

It tries to reimplement the Windows API. For details please see the their development section: [1]

Why would somebody want to do that?
Seriously, I have immense respect for the technical achievements of the wine project but I think creating a compatibility layer for another closed source system by stumbling in the dark due to lacking or even misleading documentation and without getting any help from their side is a lost cause - even for a big project like wine.
Our little community, which is barely able to maintain the own platform, should not step into that ring.

If you want to run Windows programs, get Windows! And if you want to run iOS programs get an iPhone!

[1] http://www.winehq.org/devel/