OPTIONS=FILES=for ARGdo	case "$ARG" in	-*)	OPTIONS="$OPTIONS $ARG";;	*)	FILES="$FILES $ARG";;	esacdoneif test -z "$FILES"; then	echo "Usage: zdiff [diff_options] file [file]"	exit 1fiset $FILESif test $# -eq 1; then	FILE=`expr $1 : '\(.*\)\.Z' '|' $1`	zcat $FILE | diff $OPTIONS - $FILE	STAT="$?"elif test $# -eq 2; then	case "$1" in	*.Z)	case "$2" in		*.Z)	F=`basename $2 .Z`			zcat $2 > /tmp/$F.$$			zcat $1 | diff $OPTIONS - /tmp/$F.$$			STAT="$?";;		*)	zcat $1 | diff $OPTIONS - $2;;		esac;;	*)	case "$2" in		*.Z)	zcat $2 | diff $OPTIONS $1 -			STAT="$?";;		*)	diff $OPTIONS $1 $2			STAT="$?";;		esac;;	esac	exit "$STAT"else	echo "Usage: zdiff [diff_options] file [file]"	exit 1fi