How does the Flow-tools utility encode data in a dump?

Question

go

At the moment, this utility is now on the server and writes a Netflow v5 dump, I would like to know how it is possible to decode this dump from the GO code, although I know that you can call code from C using CGO, I don’t ask you to look for me in a ton this function, just wondering if anyone has come across this and can tell me, or it is possible to decode the dump without using the C language in pure Go, while I wrote a utility that calls flow-tools commands from the command line and from stdout I do data parsing, built-in tools do not suit because of the long work of collecting statistics.