57 lines
1.6 KiB
Factor
Executable File
57 lines
1.6 KiB
Factor
Executable File
! Copyright (C) 2006, 2007 Daniel Ehrenberg.
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! See http://factorcode.org/license.txt for BSD license.
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USING: math kernel sequences sbufs vectors
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namespaces unicode.syntax growable strings io ;
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IN: io.encodings
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TUPLE: encode-error ;
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: encode-error ( -- * ) \ encode-error construct-empty throw ;
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TUPLE: decode-error ;
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: decode-error ( -- * ) \ decode-error construct-empty throw ;
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SYMBOL: begin
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: decoded ( buf ch -- buf ch state )
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over push 0 begin ;
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: push-replacement ( buf -- buf ch state )
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UNICHAR: replacement-character decoded ;
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: finish-decoding ( buf ch state -- str )
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begin eq? [ decode-error ] unless drop "" like ;
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: start-decoding ( seq length -- buf ch state seq )
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<sbuf> 0 begin roll ;
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: decode ( seq quot -- string )
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>r dup length start-decoding r>
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[ -rot ] swap compose each
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finish-decoding ; inline
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: space ( resizable -- room-left )
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dup underlying swap [ length ] 2apply - ;
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: full? ( resizable -- ? ) space zero? ;
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: decode-part-loop ( buf ch state stream quot -- string )
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>r >r pick r> r> rot full?
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[ 2drop 2drop >string ]
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[ [ >r stream-read1 -rot r> call ] 2keep decode-part-loop ] if ; inline
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: decode-part ( length stream quot -- string )
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>r swap start-decoding r>
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decode-part-loop ; inline
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GENERIC: init-decoding ( stream encoding -- decoded-stream )
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: <decoding> ( stream decoding-class -- decoded-stream )
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construct-empty init-decoding ;
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GENERIC: init-encoding ( stream encoding -- encoded-stream )
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: <encoding> ( stream encoding-class -- encoded-stream )
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construct-empty init-encoding ;
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