To_string.blito ~src ~dst ~dst_pos ~src_len ()
reads src_len
bytes from src
,
advancing src
's window accordingly, and writes them into dst
starting at
dst_pos
. By default dst_pos = 0
and src_len = length src
. It is an error if
dst_pos
and src_len
don't specify a valid region of dst
or src_len > length
src
.
('d, 'w) Iobuf.t
accessor function manipulating 'a
, either writing it to the
iobuf or reading it from the iobuf.