22 lines
563 B
Factor
Executable File
22 lines
563 B
Factor
Executable File
! Copyright (C) 2008 Daniel Ehrenberg.
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! See http://factorcode.org/license.txt for BSD license.
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USING: io io.encodings kernel math io.encodings.private ;
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IN: io.encodings.ascii
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<PRIVATE
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: encode-if< ( char stream encoding max -- )
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nip 1- pick < [ encode-error ] [ stream-write1 ] if ; inline
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: decode-if< ( stream encoding max -- character )
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nip swap stream-read1 dup
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[ tuck > [ drop replacement-char ] unless ] [ 2drop f ] if ; inline
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PRIVATE>
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SINGLETON: ascii
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M: ascii encode-char
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128 encode-if< ;
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M: ascii decode-char
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128 decode-if< ;
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