* @parent_object: parent #GMimeFilter
* @saw_nl: previous char was a \n
* @line: temporary buffer for line unfolding
* @parent_object: parent #GMimeFilter
* @saw_nl: previous char was a \n
* @line: temporary buffer for line unfolding
* @lineptr: pointer to the first unused character in @line
*
* A filter to decode rfc2047 encoded headers
* @lineptr: pointer to the first unused character in @line
*
* A filter to decode rfc2047 encoded headers