class type in_obj_channel = object .. end
The most basic input object for best interoperability.
method input : string -> int -> int -> int
input buf ofs len reads up to len octets from the channel
and puts them in the substring buf.[ofs .. ofs+len-1].
Returns the number of octets actually read (and stored). When
the channel is non-blocking, and there are currently no bytes
to read, the number 0 will be returned.
Raises End_of_file when there are no more bytes to read.
method close_in : unit -> unit
Closes the channel for input.