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various fixes and optimisations: 

• ensure unsigned arithmetics is used in the cdb hash
• make the hash functions print their result again
• now we can use the Lb64{en,de}code trick of using stdin if "$*"==""
• optimise the one-at-a-time code for shell
This commit is contained in:
tg 2009-08-27 16:40:08 +00:00
parent 4c1a99da7c
commit b5b5d905b0
1 changed files with 10 additions and 6 deletions
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16
dot.mkshrc
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@ -1,4 +1,4 @@
# $MirOS: src/bin/mksh/dot.mkshrc,v 1.47 2009/08/27 16:29:21 tg Exp $
# $MirOS: src/bin/mksh/dot.mkshrc,v 1.48 2009/08/27 16:40:08 tg Exp $
#-
# Copyright (c) 2002, 2003, 2004, 2006, 2007, 2008, 2009
# Thorsten Glaser <tg@mirbsd.org>
@ -280,10 +280,11 @@ function Lcdbhash_add {
typeset u=$-
set +U
typeset s="$*"
[[ -n $s ]] || { s=$(cat;print x); s=${s%x}; }
typeset -i i=0 n=${#s}
while (( i < n )); do
(( Lcdbhash_result = (Lcdbhash_result * 33) ^ 1#${s:(i++):1} ))
((# Lcdbhash_result = (Lcdbhash_result * 33) ^ 1#${s:(i++):1} ))
done
[[ $u = *U* ]] && set -U
@ -292,6 +293,7 @@ function Lcdbhash_add {
function Lcdbhash {
Lcdbhash_result=5381
Lcdbhash_add "$@"
print ${Lcdbhash_result#16#}
}
# Jenkins one-at-a-time hash (not via stdio, for speed)
@ -300,11 +302,12 @@ function Loaathash_add {
typeset u=$-
set +U
typeset s="$*"
[[ -n $s ]] || { s=$(cat;print x); s=${s%x}; }
typeset -i i=0 n=${#s}
while (( i < n )); do
((# Loaathash_result += 1#${s:(i++):1} ))
((# Loaathash_result += Loaathash_result << 10 ))
((# Loaathash_result = (Loaathash_result + 1#${s:(i++):1}) *
1025 ))
((# Loaathash_result ^= Loaathash_result >> 6 ))
done
@ -315,8 +318,9 @@ function Loaathash {
Loaathash_result=0 # hmm...
Loaathash_add "$@"
((# Loaathash_result += Loaathash_result << 3 ))
((# Loaathash_result ^= Loaathash_result >> 11 ))
((# Loaathash_result += Loaathash_result << 15 ))
((# Loaathash_result = (Loaathash_result ^
(Loaathash_result >> 11)) * 32769 ))
print ${Loaathash_result#16#}
}
# strip comments (and leading/trailing whitespace if IFS is set) from