+/**
+ * High-Level Data Link Control parsing function.
+ * Parse bitstream in order to find characters.
+ *
+ * \param hdlc HDLC context.
+ * \param bit current bit to be parsed.
+ * \param fifo FIFO buffer used to push characters.
+ *
+ * \return true if all is ok, false if the fifo is full.
+ */
+static bool hdlc_parse(Hdlc *hdlc, bool bit, FIFOBuffer *fifo)