#!/bin/sh

get()
{
	hexdump -v -s $1 -n ${4:-${3:-2}} -e "\"\" 1/${3:-2} \" %u\n\"" "$2"
}

[ -s $1/SETS ] || exit 1
SET="$(cat $1/SETS)"

if ! grep -q 'span id="format"' index-$1.html; then
	awk 'BEGIN {i=-1} { 
if (/o <tt>fd/) { sub(/o <tt>fd/,"&<span id=\"last" i "\">") }
if (/	<tt>fd/) { sub(/	<tt>fd/,"&<span id=\"last" i "\">") }
if (/B of RAM and /) { i++ ; sub(/B of RAM and /,"&<span id=\"cnt" i "\">") }
print }' < index-$1.html | \
	sed -e 's|\.img</tt>\.<br>|</span>&|;s| floppies:|</span>&|' \
	 -e 's|1.44MB|<span id="format">1.44MB</span>|' \
	 -e 's|<div class="large"><table>|<div class="large"><table id="floppies">|' \
	 -e "s|<!-- Content -->|<script type=\"text/javascript\">\\
var dir = \"$1\";\\
var sets = [${SET// /,}];\\
//-->\\
</script>\\
<script type=\"text/javascript\" src=\"format.js\"></script>\\
\\
&|" \
	 -e 's|<div class="large"><table>|<div class="large"><table id="floppies">|' > index-$1.html.$$
	mv index-$1.html.$$ index-$1.html
fi

cat $1/fd???.img > $1/fd.img
dir=$1
set -- $SET
if [ -n "$SET" ]; then
	size=$1
	best=$1
	cd $dir
	for i in $(sed '/option value/!d;s|.*value=.||;s|. title.*||' ../format.js); do
		s=$((((($size-1)/$i)+1)*$i))
		[ $s -gt $best ] && best=$s
		dd of=fd.img bs=1 count=0 seek=$s 2> /dev/null
		[ -d $i ] || mkdir $i
		cd $i
		split -b $i ../fd.img xx
		set -- $SET
		n=1; sz=0
		ls xx* | while read x; do
			mv $x $(printf "fd%03d.img" $n)
			n=$(($n+1))
			sz=$(($sz+$i))
			if [ $sz -ge $1 ]; then
				n=$(($n-($n%100)+100))
				shift
				[ -n "$1" ] || break
			fi
		done
		md5sum fd* > md5sum
		rm fd*
		cd ..
	done
	dd of=fd.img bs=1 count=0 seek=$best 2> /dev/null
	cd ..
	echo $SET
fi