I am working on code that will load the BSA files and game data (including loose files) exactly the same way as the game does it but I need some code to calculate the BSA file hashes.

There is code here
http://www.uesp.net/wiki/Tes4Mod:BSA_File_Format
but its in Python and I cant read Python. Does anyone have something in a language like C++ or can someone help me come up with a C++ version of the Python code?

Google BSAOpt by Ethatron. It's in C and C++.

In the future you might also be interested be interested in using libbsa, which is a library for reading and writing BSA files that I'm in the process of writing, using code from BSAOpt. It's not released yet though.

Thanks, the code there is perfect and yes libbsa sounds good.

Such a library would be greatly appreciated