176 lines
4.3 KiB
Factor
176 lines
4.3 KiB
Factor
! Copyright (C) 2008, 2010 Daniel Ehrenberg, Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: math kernel sequences sbufs vectors namespaces growable
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strings io classes continuations destructors combinators
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io.streams.plain splitting byte-arrays
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sequences.private accessors ;
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IN: io.encodings
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! The encoding descriptor protocol
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GENERIC: decode-char ( stream encoding -- char/f )
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GENERIC: encode-char ( char stream encoding -- )
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GENERIC: encode-string ( string stream encoding -- )
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M: object encode-string [ encode-char ] 2curry each ; inline
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GENERIC: <decoder> ( stream encoding -- newstream )
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CONSTANT: replacement-char HEX: fffd
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TUPLE: decoder stream code cr ;
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ERROR: decode-error ;
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GENERIC: <encoder> ( stream encoding -- newstream )
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TUPLE: encoder stream code ;
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ERROR: encode-error ;
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! Decoding
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M: object <decoder> f decoder boa ;
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<PRIVATE
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: cr+ ( stream -- ) t >>cr drop ; inline
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: cr- ( stream -- ) f >>cr drop ; inline
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: >decoder< ( decoder -- stream encoding )
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[ stream>> ] [ code>> ] bi ; inline
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: fix-read1 ( stream char -- char )
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over cr>> [
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over cr-
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dup CHAR: \n = [
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drop dup stream-read1
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] when
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] when nip ; inline
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M: decoder stream-element-type
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drop +character+ ;
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M: decoder stream-tell stream>> stream-tell ;
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M: decoder stream-seek stream>> stream-seek ;
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M: decoder stream-read1
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dup >decoder< decode-char fix-read1 ;
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: fix-read ( stream string -- string )
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over cr>> [
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over cr-
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"\n" ?head [
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over stream-read1 [ suffix ] when*
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] when
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] when nip ; inline
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: (read) ( n quot -- n string )
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over 0 <string> [
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[
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over [ swapd set-nth-unsafe f ] [ 3drop t ] if
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] curry compose find-integer
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] keep ; inline
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: finish-read ( n string -- string/f )
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{
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{ [ over 0 = ] [ 2drop f ] }
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{ [ over not ] [ nip ] }
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[ swap head ]
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} cond ; inline
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M: decoder stream-read
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[ nip ] [ >decoder< [ decode-char ] 2curry (read) finish-read ] 2bi
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fix-read ;
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M: decoder stream-read-partial stream-read ;
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: line-ends/eof ( stream str -- str ) f like swap cr- ; inline
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: line-ends\r ( stream str -- str ) swap cr+ ; inline
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: line-ends\n ( stream str -- str )
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over cr>> over empty? and
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[ drop dup cr- stream-readln ] [ swap cr- ] if ; inline
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: handle-readln ( stream str ch -- str )
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{
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{ f [ line-ends/eof ] }
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{ CHAR: \r [ line-ends\r ] }
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{ CHAR: \n [ line-ends\n ] }
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} case ; inline
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: ((read-until)) ( buf quot: ( -- char stop? ) -- string/f sep/f )
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dup call
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[ [ drop "" like ] dip ]
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[ pick push ((read-until)) ] if ; inline recursive
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: (read-until) ( quot -- string/f sep/f )
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100 <sbuf> swap ((read-until)) ; inline
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: decoder-read-until ( seps stream encoding -- string/f sep/f )
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[ decode-char dup [ dup rot member? ] [ 2drop f t ] if ] 3curry
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(read-until) ;
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M: decoder stream-read-until >decoder< decoder-read-until ;
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: decoder-readln ( stream encoding -- string/f sep/f )
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[ decode-char dup [ dup "\r\n" member? ] [ drop f t ] if ] 2curry
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(read-until) ;
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M: decoder stream-readln dup >decoder< decoder-readln handle-readln ;
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M: decoder dispose stream>> dispose ;
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! Encoding
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M: object <encoder> encoder boa ;
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: >encoder< ( encoder -- stream encoding )
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[ stream>> ] [ code>> ] bi ; inline
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M: encoder stream-element-type
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drop +character+ ;
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M: encoder stream-write1
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>encoder< encode-char ;
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M: encoder stream-write
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>encoder< encode-string ;
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M: encoder dispose stream>> dispose ;
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M: encoder stream-flush stream>> stream-flush ;
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INSTANCE: encoder plain-writer
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PRIVATE>
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GENERIC# re-encode 1 ( stream encoding -- newstream )
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M: object re-encode <encoder> ;
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M: encoder re-encode [ stream>> ] dip re-encode ;
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: encode-output ( encoding -- )
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output-stream [ swap re-encode ] change ;
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: with-encoded-output ( encoding quot -- )
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[ [ output-stream get ] dip re-encode ] dip
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with-output-stream* ; inline
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GENERIC# re-decode 1 ( stream encoding -- newstream )
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M: object re-decode <decoder> ;
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M: decoder re-decode [ stream>> ] dip re-decode ;
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: decode-input ( encoding -- )
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input-stream [ swap re-decode ] change ;
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: with-decoded-input ( encoding quot -- )
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[ [ input-stream get ] dip re-decode ] dip
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with-input-stream* ; inline
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