basis/io/streams/null/null.factor

   1 ! Copyright (C) 2007, 2009 Slava Pestov.
   2 ! See http://factorcode.org/license.txt for BSD license.
   3 USING: kernel io destructors io.streams.plain ;
   4 IN: io.streams.null
   5
   6 SINGLETONS: null-reader null-writer ;
   7 UNION: null-stream null-reader null-writer ;
   8 INSTANCE: null-writer plain-writer
   9
  10 M: null-stream dispose drop ;
  11
  12 M: null-reader stream-element-type drop +byte+ ;
  13 M: null-reader stream-readln drop f ;
  14 M: null-reader stream-read1 drop f ;
  15 M: null-reader stream-read-until 2drop f f ;
  16 M: null-reader stream-read 2drop f ;
  17
  18 M: null-writer stream-element-type drop +byte+ ;
  19 M: null-writer stream-write1 2drop ;
  20 M: null-writer stream-write 2drop ;
  21 M: null-writer stream-flush drop ;
  22
  23 : with-null-reader ( quot -- )
  24     null-reader swap with-input-stream* ; inline
  25
  26 : with-null-writer ( quot -- )
  27     null-writer swap with-output-stream* ; inline