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#!/usr/bin/env bash
function add_to_array() {
case $1 in
*[!0-9]*) exit 1 ;;
*) ;;
esac
array+=( $1 )
if [ $1 -gt $MAX ]; then
MAX=$1
fi
if [ $1 -lt $MIN ]; then
MIN=$1
fi
}
if [ -t 0 ] && [ $# -lt 2 ] || [ "$1" = "-h" ] || [ "$1" = "--help" ]
then
cat <<-EOF
Spark
Code was written by Joursoir <chat@joursoir.net>
This is free and unencumbered software released into the public domain.
Synopsis: spark [-h|--help] [number] ...
EOF
exit 0
fi
case `uname -m` in
x86_64|amd64) # 64 bit
MAX=$(( -2**63 ));
MIN=$(( 2**63-1 )) ;;
i686|i386|x86) # 32 bit
MAX=$(( -2**31 ));
MIN=$(( 2**31-1 )) ;;
*) # 16 bit
MAX=$(( -2*15 ));
MIN=$(( 2*15-1 )) ;;
esac
if [ $# -gt 1 ]
then
for i in "$@"; do
add_to_array $i
done
else
while read -r i; do
add_to_array $i
done
fi
LEVELS=8
DIFF=$(( $MAX - $MIN + 1 ))
for i in "${array[@]}"
do
H=$(( 1 + ($i - $MIN + 1) * ($LEVELS-1) / $DIFF ))
printf "\u258$H"
done
echo
exit 0
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