59 lines
1.7 KiB
Factor
59 lines
1.7 KiB
Factor
! Copyright (C) 2003, 2005 Slava Pestov.
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! See http://factor.sf.net/license.txt for BSD license.
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IN: io
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USING: errors generic kernel lists math namespaces sequences
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strings ;
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SYMBOL: stdio
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! Stream protocol.
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GENERIC: stream-flush ( stream -- )
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GENERIC: stream-finish ( stream -- )
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GENERIC: stream-readln ( stream -- string )
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GENERIC: stream-read1 ( stream -- char/f )
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GENERIC: stream-read ( count stream -- string )
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GENERIC: stream-write1 ( char stream -- )
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GENERIC: stream-format ( string style stream -- )
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GENERIC: stream-close ( stream -- )
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GENERIC: set-timeout ( timeout stream -- )
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: stream-write ( string stream -- )
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f swap stream-format ;
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: stream-terpri ( stream -- )
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"\n" over stream-write stream-finish ;
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: stream-print ( string stream -- )
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[ stream-write ] keep stream-terpri ;
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: (stream-copy) ( in out -- )
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4096 pick stream-read
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[ over stream-write (stream-copy) ] [ 2drop ] ifte* ;
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: stream-copy ( in out -- )
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[ 2dup (stream-copy) ]
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[ >r stream-close stream-close r> [ rethrow ] when* ] catch ;
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! Think '/dev/null'.
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TUPLE: null-stream ;
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M: null-stream stream-flush drop ;
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M: null-stream stream-finish drop ;
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M: null-stream stream-readln drop f ;
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M: null-stream stream-read 2drop f ;
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M: null-stream stream-read1 drop f ;
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M: null-stream stream-write1 2drop ;
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M: null-stream stream-format 3drop ;
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M: null-stream stream-close drop ;
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! Sometimes, we want to have a delegating stream that uses stdio
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! words.
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TUPLE: wrapper-stream scope ;
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C: wrapper-stream ( stream -- stream )
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2dup set-delegate [
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>r [ stdio set ] make-hash r> set-wrapper-stream-scope
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] keep ;
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: with-wrapper ( stream quot -- )
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>r wrapper-stream-scope r> bind ; inline
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