- int fd; /* file descriptor if this rrd file */
- char *file_start; /* start address of an open rrd file */
- off_t header_len; /* length of the header of this rrd file */
- off_t file_len; /* total size of the rrd file */
- off_t pos; /* current pos in file */
+ size_t header_len; /* length of the header of this rrd file */
+ size_t file_len; /* total size of the rrd file */
+ size_t pos; /* current pos in file */
+ void *pvt;