class Hash

def ffi_yajl(yajl_gen, state)
  if state[:processing_key]
    str = self.to_s
    if ( status = FFI_Yajl.yajl_gen_string(yajl_gen, str, str.bytesize) ) != 0
      FFI_Yajl::Encoder.raise_error_for_status(status)
    end
  else
    if ( status = FFI_Yajl.yajl_gen_map_open(yajl_gen) ) != 0
      FFI_Yajl::Encoder.raise_error_for_status(status)
    end
    self.each do |key, value|
      # Perf Fix: mutate state hash rather than creating new copy
      state[:processing_key] = true
      key.ffi_yajl(yajl_gen, state)
      state[:processing_key] = false
      value.ffi_yajl(yajl_gen, state)
    end
    if ( status = FFI_Yajl.yajl_gen_map_close(yajl_gen) ) != 0
      FFI_Yajl::Encoder.raise_error_for_status(status)
    end
  end
end