+rrd_add_ptr
+rrd_add_strdup
rrd_clear_error
rrd_close
rrd_cmd_flush
rrd_fetch_r
rrd_first
rrd_first_r
-rrd_flush
rrd_free
rrd_free_context
+rrd_free_ptrs
rrd_freemem
rrd_get_context
rrd_get_error
rrd_open
rrd_parsetime
rrd_proc_start_end
+rrd_random
rrd_read
rrd_resize
rrd_restore