/** \brief read function */
int (*readf)(struct ZebraRecStream *s, char *buf, size_t count);
/** \brief seek function */
off_t (*seekf)(struct ZebraRecStream *s, off_t offset);
/** \brief tell function */
/** \brief read function */
int (*readf)(struct ZebraRecStream *s, char *buf, size_t count);
/** \brief seek function */
off_t (*seekf)(struct ZebraRecStream *s, off_t offset);
/** \brief tell function */