48 lines
1.4 KiB
Factor
48 lines
1.4 KiB
Factor
! Copyright (C) 2006 Chris Double.
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel io.streams.string io strings splitting sequences math
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math.parser assocs classes words namespaces prettyprint
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hashtables mirrors ;
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IN: json.writer
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#! Writes the object out to a stream in JSON format
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GENERIC: json-print ( obj -- )
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: >json ( obj -- string )
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#! Returns a string representing the factor object in JSON format
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[ json-print ] with-string-writer ;
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M: f json-print ( f -- )
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drop "false" write ;
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M: string json-print ( obj -- )
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CHAR: " write1 "\"" split "\\\"" join CHAR: \r swap remove "\n" split "\\r\\n" join write CHAR: " write1 ;
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M: number json-print ( num -- )
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number>string write ;
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M: sequence json-print ( array -- )
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CHAR: [ write1 [ >json ] map "," join write CHAR: ] write1 ;
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: jsvar-encode ( string -- string )
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#! Convert the string so that it contains characters usable within
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#! javascript variable names.
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{ { CHAR: - CHAR: _ } } substitute ;
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: tuple>fields ( object -- seq )
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<mirror> [
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[ swap jsvar-encode >json % " : " % >json % ] "" make
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] { } assoc>map ;
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M: tuple json-print ( tuple -- )
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CHAR: { write1 tuple>fields "," join write CHAR: } write1 ;
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M: hashtable json-print ( hashtable -- )
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CHAR: { write1
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[ [ swap jsvar-encode >json % CHAR: : , >json % ] "" make ]
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{ } assoc>map "," join write
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CHAR: } write1 ;
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M: object json-print ( object -- )
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unparse json-print ;
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