#! /bin/sh

if [ $# = 0 ]; then
	echo "Convert file(s) between codepages"
	echo "Usage: conv [file{ file{ file{ ...}}}] [from codepage] [to codepage]"
	exit
fi

for x in $*; do
	if [ -n "$var" ]; then
		eval "$var=$x"
		var=
		continue
	fi
	case $x in
		[fF] | [fF][rR][oO][mM])
			var=fromenc
			;;
		[tT] | [tT][oO])
			var=toenc
			;;
		*)
			files="$files $x"
			;;
	esac
done

iconv="iconv -c"
[ -n "$fromenc" ] && iconv="$iconv -f $fromenc"
[ -n "$toenc" ] && iconv="$iconv -t $toenc"

TMPFILE=`mktemp -q /tmp/d2u.XXXXXX`
if [ $? -ne 0 ]; then
	echo "$0: Can't create temp file, exiting..."
	exit 1
fi

for x in $files; do
	echo -n "Converting $x ..."
	if [ ! -f "$x" ]; then
		echo " NO SUCH FILE"
		shift; continue
	fi
	$iconv $x -o $TMPFILE
	if [ $? -gt 1 ]; then
		echo " ERROR"
		shift; continue
	fi
	echo -n " ok"
	cmp -s $TMPFILE $x
	if [ $? -eq 0 ]; then
		echo ", no changes"
		shift; continue
	fi
	echo y|cp $TMPFILE $x 2>/dev/null
	if [ $? -ne 0 ]; then
		echo " CANT COPY $TMPFILE TO $x"
		shift; continue
	fi
	echo ", done"
	shift
done
rm -f $TMPFILE