Calling C function from lua

Question

Can someone tell me is it possible to somehow call c function or simply wrap it into a lua function WITHOUT building a new module.

Answer 1

If it works for you, try the FFI library. See also luaffi.

Answer 2

Lua can't call arbitrary C functions - they have to be bound to something in the Lua namespace first. (This is intentional to prevent breaking out of sandboxes in embedded applications.)