mkbidiclasses

#! /bin/sh

unidata=UnicodeData.txt
make $unidata >&2

(
cat <<\/EOS
first=
item () {
	if [ -z "$first" ]
	then	first=$1
		val=$2
	fi
	last=$1
}
range () {
	echo "    {0x$first, 0x$last, $val},"
	first=
}
/EOS
sed -e "s,^\([^;]*\);[^;]*;[^;]*;[^;]*;\([^;]*\);.*,\1	\2," "$unidata" |
uniq -f1 --group=append | sed -e "s,^$,range," -e t -e "s,^,item ,"
) | sh | grep -v ", ON}"

exit

According to minibidi.c, this should have worked:
perl -ne 'split ";"; $num = hex $_[0]; $type = $_[4];' \
 -e '$fl = ($_[1] =~ /First/ ? 1 : $_[1] =~ /Last/ ? 2 : 0);' \
 -e 'if ($type eq $runtype and ($runend == $num-1 or ' \
 -e '    ($fl==2 and $pfl==1))) {$runend = $num;} else { &reset; }' \
 -e '$pfl=$fl; END { &reset }; sub reset {' \
 -e 'printf"        {0x%04x, 0x%04x, %s},\n",$runstart,$runend,$runtype' \
 -e '  if defined $runstart and $runtype ne "ON";' \
 -e '$runstart=$runend=$num; $runtype=$type;}' \
 UnicodeData.txt