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refactor some weirdness in checksums.common

db4
Doug Coleman 2008-12-17 01:40:09 -06:00
parent 3da35fe529
commit be5a099379
1 changed files with 7 additions and 8 deletions
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15
basis/checksums/common/common.factor
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@ -1,21 +1,20 @@
! Copyright (C) 2006, 2008 Doug Coleman.
! See http://factorcode.org/license.txt for BSD license.
USING: kernel math math.bitwise strings io.binary namespaces
make grouping ;
make grouping byte-arrays ;
IN: checksums.common
SYMBOL: bytes-read
: calculate-pad-length ( length -- pad-length )
dup 56 < 55 119 ? swap - ;
: calculate-pad-length ( length -- length' )
[ 56 < 55 119 ? ] keep - ;
: pad-last-block ( str big-endian? length -- str )
[
rot %
HEX: 80 ,
dup HEX: 3f bitand calculate-pad-length 0 <string> %
3 shift 8 rot [ >be ] [ >le ] if %
] "" make 64 group ;
[ % ] 2dip HEX: 80 ,
[ HEX: 3f bitand calculate-pad-length <byte-array> % ]
[ 3 shift 8 rot [ >be ] [ >le ] if % ] bi
] B{ } make 64 group ;
: update-old-new ( old new -- )
[ [ get ] bi@ w+ dup ] 2keep [ set ] bi@ ; inline