fun set_buffering_mode(buf_size, mode: Int) do
if buf_size <= 0 then buf_size = 512
if _file.set_buffering_type(buf_size, mode) != 0 then
fun set_buffering_mode(buf_size, mode: Int) do
if buf_size <= 0 then buf_size = 512
if _file.set_buffering_type(buf_size, mode) != 0 then