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#!/bin/bash
printhelp() { echo "$0 FontFile"; exit 1; }
printerror() { local error=$1; shift; echo "$0: $@"; exit "$error"; }
[ "$#" -ne 1 ] && printhelp
width=70
fontfile="$1"
[ -f "$fontfile" ] || printerror 4 'File not found'
list=$(fc-query --format='%{charset}\n' "$fontfile")
for range in $list
do IFS=- read start end <<<"$range"
if [ "$end" ]
then
start=$((16#$start))
end=$((16#$end))
for((i=start;i<=end;i++)); do
printf -v char '\\U%x' "$i"
printf '%b' "$char"
done
else
printf '%b' "\\U$start"
fi
done | grep -oP '.{'"$width"'}'
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