1 ! Copyright (c) 2008 Slava Pestov
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors byte-arrays byte-vectors io io.backend io.files
4 kernel math math.parser sequences ;
10 { bytes-read integer }
11 { block-size integer }
12 { bytes byte-vector } ;
14 : new-checksum-state ( class -- checksum-state )
16 BV{ } clone >>bytes ; inline
18 M: checksum-state clone
20 [ clone ] change-bytes ;
22 GENERIC: initialize-checksum-state ( checksum -- checksum-state )
24 GENERIC: checksum-block ( bytes checksum -- )
26 GENERIC: get-checksum ( checksum -- value )
28 : add-checksum-bytes ( checksum-state data -- checksum-state )
29 over bytes>> [ push-all ] keep
30 [ dup length pick block-size>> >= ]
32 over block-size>> cut-slice [
33 >byte-array over checksum-block
34 [ block-size>> ] keep [ + ] change-bytes-read
38 [ >>bytes ] [ length [ + ] curry change-bytes-read ] bi ;
40 : add-checksum-stream ( checksum-state stream -- checksum-state )
42 [ [ swap add-checksum-bytes drop ] curry each-block ] keep
45 : add-checksum-file ( checksum-state path -- checksum-state )
46 normalize-path (file-reader) add-checksum-stream ;
48 GENERIC: checksum-bytes ( bytes checksum -- value )
50 GENERIC: checksum-stream ( stream checksum -- value )
52 GENERIC: checksum-lines ( lines checksum -- value )
54 M: checksum checksum-stream
55 [ stream-contents ] dip checksum-bytes ;
57 M: checksum checksum-lines
58 [ B{ CHAR: \n } join ] dip checksum-bytes ;
60 : checksum-file ( path checksum -- value )
61 ! normalize-path (file-reader) is equivalent to
62 ! binary <file-reader>. We use the lower-level form
63 ! so that we can move io.encodings.binary to basis/.
64 [ normalize-path (file-reader) ] dip checksum-stream ;
66 : hex-string ( seq -- str )
67 [ >hex 2 CHAR: 0 pad-head ] { } map-as concat ;