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Base64 decode data: Difference between revisions
Bash decode
(Bash decode) |
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Line 46:
ico$ = B64DEC$(data$)
BSAVE ico$ TO "favicon.ico" SIZE LEN(ico$)</lang>
=={{header|Bash}}==
{{trans|Bash}}
<lang bash>#! /bin/bash
declare -a encodeTable=(
# + , - . / 0 1 2 3 4 5 6 7 8 9 :
62 -1 -1 -1 63 52 53 54 55 56 57 58 59 60 61 -1
# ; < = > ? @ A B C D E F G H I J
-1 -1 -1 -1 -1 -1 0 1 2 3 4 5 6 7 8 9
# K L M N O P Q R S T U V W X Y Z
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
# [ \ ] ^ _ ` a b c d e f g h i j
-1 -1 -1 -1 -1 -1 26 27 28 29 30 31 32 33 34 35
# k l m n o p q r s t u v w x y z
36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
)
function a2b6()
{
if [ $1 -lt 43 -o $1 -gt 122 ]
then
echo -1
else
echo ${encodeTable[$(($1-43))]}
fi
}
function flush() {
for (( k=2; k>=4-CNT; k-- ))
do
(( b8=BUF>>(k*8)&255 ))
printf -v HEX %x $b8
printf \\x$HEX
done
}
while read INPUT
do
for (( i=0; i<${#INPUT}; i++ ))
do
printf -v NUM %d "'${INPUT:$i:1}"
if (( NUM==61 ))
then
flush
exit 0
else
DEC=$( a2b6 $NUM )
if (( DEC>=0 ))
then
(( BUF|=DEC<<6*(3-CNT) ))
if (( ++CNT==4 ))
then
flush
(( CNT=0, BUF=0 ))
fi
fi
fi
done
done</lang>
=={{header|C}}==
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