Google officially provides a C++ implementation of Google Protocol buffers, but I'm looking for a C implementation.
I will not be using it myself, but my hope is that I can use this tool to generate C code for our Google Protocol Buffer definitions which I can then hand of to the C developers.
I'm not looking for any RPC functionality, simply encoding and decoding of Google Protocol Buffer messages.
pbtools is another alternative. It generates fast C source code to encode and decode protobuf messages.
Also, there is a list of more C implementations here: https://github.com/protocolbuffers/protobuf/blob/master/docs/third_party.md
μpb is a small protobuf implementation written in C.
upb generates a C API for creating, parsing, and serializing messages as declared in .proto files. upb is heavily arena-based
