1 ! Copyright (C) 2008 Daniel Ehrenberg.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: math kernel sequences sbufs vectors namespaces growable
4 strings io classes continuations destructors combinators
5 io.streams.plain splitting byte-arrays
6 sequences.private accessors ;
9 ! The encoding descriptor protocol
11 GENERIC: decode-char ( stream encoding -- char/f )
13 GENERIC: encode-char ( char stream encoding -- )
15 GENERIC: <decoder> ( stream encoding -- newstream )
17 : replacement-char HEX: fffd ; inline
19 TUPLE: decoder stream code cr ;
23 GENERIC: <encoder> ( stream encoding -- newstream )
25 TUPLE: encoder stream code ;
31 M: object <decoder> f decoder boa ;
35 : cr+ t >>cr drop ; inline
37 : cr- f >>cr drop ; inline
39 : >decoder< ( decoder -- stream encoding )
40 [ stream>> ] [ code>> ] bi ; inline
42 : fix-read1 ( stream char -- char )
50 M: decoder stream-read1
51 dup >decoder< decode-char fix-read1 ;
53 : fix-read ( stream string -- string )
57 over stream-read1 [ suffix ] when*
61 : (read) ( n quot -- n string )
65 [ swapd set-nth-unsafe f ] [ 3drop t ] if
69 : finish-read ( n string -- string/f )
71 { [ over 0 = ] [ 2drop f ] }
72 { [ over not ] [ nip ] }
76 M: decoder stream-read
77 tuck >decoder< [ decode-char ] 2curry (read) finish-read fix-read ;
79 M: decoder stream-read-partial stream-read ;
81 : line-ends/eof ( stream str -- str ) f like swap cr- ; inline
83 : line-ends\r ( stream str -- str ) swap cr+ ; inline
85 : line-ends\n ( stream str -- str )
86 over cr>> over empty? and
87 [ drop dup cr- stream-readln ] [ swap cr- ] if ; inline
89 : handle-readln ( stream str ch -- str )
91 { f [ line-ends/eof ] }
92 { CHAR: \r [ line-ends\r ] }
93 { CHAR: \n [ line-ends\n ] }
96 : ((read-until)) ( buf quot: ( -- char stop? ) -- string/f sep/f )
98 [ >r drop "" like r> ]
99 [ pick push ((read-until)) ] if ; inline recursive
101 : (read-until) ( quot -- string/f sep/f )
102 100 <sbuf> swap ((read-until)) ; inline
104 : decoder-read-until ( seps stream encoding -- string/f sep/f )
105 [ decode-char dup [ dup rot member? ] [ 2drop f t ] if ] 3curry
108 M: decoder stream-read-until >decoder< decoder-read-until ;
110 : decoder-readln ( stream encoding -- string/f sep/f )
111 [ decode-char dup [ dup "\r\n" member? ] [ drop f t ] if ] 2curry
114 M: decoder stream-readln dup >decoder< decoder-readln handle-readln ;
116 M: decoder dispose stream>> dispose ;
119 M: object <encoder> encoder boa ;
121 : >encoder< ( encoder -- stream encoding )
122 [ stream>> ] [ code>> ] bi ; inline
124 M: encoder stream-write1
125 >encoder< encode-char ;
127 : encoder-write ( string stream encoding -- )
128 [ encode-char ] 2curry each ;
130 M: encoder stream-write
131 >encoder< encoder-write ;
133 M: encoder dispose stream>> dispose ;
135 M: encoder stream-flush stream>> stream-flush ;
137 INSTANCE: encoder plain-writer
140 GENERIC# re-encode 1 ( stream encoding -- newstream )
142 M: object re-encode <encoder> ;
144 M: encoder re-encode [ stream>> ] dip re-encode ;
146 : encode-output ( encoding -- )
147 output-stream [ swap re-encode ] change ;
149 : with-encoded-output ( encoding quot -- )
150 [ [ output-stream get ] dip re-encode ] dip
151 with-output-stream* ; inline
153 GENERIC# re-decode 1 ( stream encoding -- newstream )
155 M: object re-decode <decoder> ;
157 M: decoder re-decode [ stream>> ] dip re-decode ;
159 : decode-input ( encoding -- )
160 input-stream [ swap re-decode ] change ;
162 : with-decoded-input ( encoding quot -- )
163 [ [ input-stream get ] dip re-decode ] dip
164 with-input-stream* ; inline