GMime Data Wrappers GMime Library GMime Data Wrappers How to use GMime Data Wrappers Data wrappers are very simple. A GMimeDataWrapper object contains both a stream and an encoding-type. The encoding-type (such as GMIME_PART_ENCODING_BASE64) is used by g_mime_data_wrapper_write_to_stream() in order to decode the data into its unencoded form. This means that you, the application programmer, do not need to worry about decoding the content stream yourself.