EXPERT using SWIG to Help Assist creating interface file for c module -> csharp

I am looking for someone to assist me in creating a proper SWIG interface file for a small .c file with some headers. Never used SWIG before, and I have a medium size project to do, so looking for someone who is an EXPERT using SWIG to build the first .i file. I am attaching: 1. C code file 2. C Header file 3. My failed attempt at creating the interface file As not all functions are required to be exported, utilize my .i file as the key to what needs to be exported. Additionally, since it is my own failed attempt I would prefer to NOT have to define all my types in the interface file and just reference other header files (if this is possible). If not so be it. While SWIG creates a wrapper for me using this interface file, it fails to compile, because its not a correct .i file.