code: def set_c_prototype(self, c_decl):
          
  
          parsed = parse_file(c_decl)
          parsed_decl = parsed[0]
          if not parsed_decl:
              raise ValueError('Cannot parse the function prototype.')
          func_name, func_proto = next(iter(parsed_decl.items()))
  
          self.set_prototype(func_name, func_proto)
  
          return func_name, func_proto
docs: Set the prototype of a function in the form of a C-style function declaration.
  
          :param str c_decl: The C-style declaration of the function.
          :return:           A tuple of (function name, function prototype)
          :rtype:            tuple