gen.py

#! /usr/bin/env python
#
# Run this before running this script
# pip install CppHeaderParser

# Run as python gen.py header.h
# Prints C file with printer-funbctions.

import json, CppHeaderParser, sys
cppHeader = CppHeaderParser.CppHeader(sys.argv[1])
header = json.loads(cppHeader.toJSON())

res = ""
for name, defi in header["classes"].items():
    res += "void print_%s(%s *o) {\n" % (name, name)
    for prop in defi["properties"]["public"]:
        if prop["type"] == "int":
            res += ' printf("%s=%%d\\n", o.%s);\n' % (prop["name"], prop["name"])
        elif prop["type"] == "char *":
            res += ' printf("%s=%%s\\n", o.%s);\n' % (prop["name"], prop["name"])
    res += "}\n"

print(res)

Above code is in the public domain, or where that is not legally possible, CC0. Have fun :)