module Bigbuffer: Bigbufferinclude Core_kernel.Bigbuffer
val add_channel : t -> Pervasives.in_channel -> int -> unitadd_channel b ic n reads exactly n character from the
   input channel ic and stores them at the end of buffer b.
   Raise End_of_file if the channel contains fewer than n
   characters.val output_buffer : Pervasives.out_channel -> t -> unitoutput_buffer oc b writes the current contents of buffer b
   on the output channel oc.