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 CONSTANT: replacement-char HEX: fffd
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+ ( stream -- ) t >>cr drop ; inline
37 : cr- ( stream -- ) f >>cr drop ; inline
39 : >decoder< ( decoder -- stream encoding )
40 [ stream>> ] [ code>> ] bi ; inline
42 : fix-read1 ( stream char -- char )
50 M: decoder stream-element-type
53 M: decoder stream-read1
54 dup >decoder< decode-char fix-read1 ;
56 : fix-read ( stream string -- string )
60 over stream-read1 [ suffix ] when*
64 : (read) ( n quot -- n string )
67 over [ swapd set-nth-unsafe f ] [ 3drop t ] if
68 ] curry compose find-integer
71 : finish-read ( n string -- string/f )
73 { [ over 0 = ] [ 2drop f ] }
74 { [ over not ] [ nip ] }
78 M: decoder stream-read
79 [ nip ] [ >decoder< [ decode-char ] 2curry (read) finish-read ] 2bi
82 M: decoder stream-read-partial stream-read ;
84 : line-ends/eof ( stream str -- str ) f like swap cr- ; inline
86 : line-ends\r ( stream str -- str ) swap cr+ ; inline
88 : line-ends\n ( stream str -- str )
89 over cr>> over empty? and
90 [ drop dup cr- stream-readln ] [ swap cr- ] if ; inline
92 : handle-readln ( stream str ch -- str )
94 { f [ line-ends/eof ] }
95 { CHAR: \r [ line-ends\r ] }
96 { CHAR: \n [ line-ends\n ] }
99 : ((read-until)) ( buf quot: ( -- char stop? ) -- string/f sep/f )
101 [ [ drop "" like ] dip ]
102 [ pick push ((read-until)) ] if ; inline recursive
104 : (read-until) ( quot -- string/f sep/f )
105 100 <sbuf> swap ((read-until)) ; inline
107 : decoder-read-until ( seps stream encoding -- string/f sep/f )
108 [ decode-char dup [ dup rot member? ] [ 2drop f t ] if ] 3curry
111 M: decoder stream-read-until >decoder< decoder-read-until ;
113 : decoder-readln ( stream encoding -- string/f sep/f )
114 [ decode-char dup [ dup "\r\n" member? ] [ drop f t ] if ] 2curry
117 M: decoder stream-readln dup >decoder< decoder-readln handle-readln ;
119 M: decoder dispose stream>> dispose ;
122 M: object <encoder> encoder boa ;
124 : >encoder< ( encoder -- stream encoding )
125 [ stream>> ] [ code>> ] bi ; inline
127 M: encoder stream-element-type
130 M: encoder stream-write1
131 >encoder< encode-char ;
133 GENERIC# encoder-write 2 ( string stream encoding -- )
135 M: string encoder-write
136 [ encode-char ] 2curry each ;
138 M: encoder stream-write
139 >encoder< encoder-write ;
141 M: encoder dispose stream>> dispose ;
143 M: encoder stream-flush stream>> stream-flush ;
145 INSTANCE: encoder plain-writer
148 GENERIC# re-encode 1 ( stream encoding -- newstream )
150 M: object re-encode <encoder> ;
152 M: encoder re-encode [ stream>> ] dip re-encode ;
154 : encode-output ( encoding -- )
155 output-stream [ swap re-encode ] change ;
157 : with-encoded-output ( encoding quot -- )
158 [ [ output-stream get ] dip re-encode ] dip
159 with-output-stream* ; inline
161 GENERIC# re-decode 1 ( stream encoding -- newstream )
163 M: object re-decode <decoder> ;
165 M: decoder re-decode [ stream>> ] dip re-decode ;
167 : decode-input ( encoding -- )
168 input-stream [ swap re-decode ] change ;
170 : with-decoded-input ( encoding quot -- )
171 [ [ input-stream get ] dip re-decode ] dip
172 with-input-stream* ; inline