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				#!/bin/sh -e
				# $FreeBSD$
				#
				# MAINTAINER: portmgr@freebsd.org

				usage() {
				cat >&2 <<EOF
				${0##*/}: usage

				${0##*/} version [ofields] [owidth]

				Output a version string converted to an integer value that will
				sort munerically into the correct version order.

				version: version string consisting of numeric fields separated by
				'.' characters. Non-numeric version fields (1.0a1) are
				treated as zero.

				ofields: number of output fields (default: 3) Fields missing from
				the input will be set to 0. Excess fields in the input
				will be ignored.

				owidth: width output fields will be zero padded to (default: 2)

				EOF
				exit 1
				}

				version=${1:?$(usage)}
				ofields=${2:-3}
				owidth=${3:-2}

				fwidth=1
				count=0
				IFS=.
				for f in $version ; do
				count=$(( count + 1 ))

				case $f in
				[^0-9.])
				f=0
				;;
				*)
				;;
				esac

				printf "%0*d" $fwidth $f
				fwidth=${owidth}
				if [ $count -ge $ofields ]; then
				break
				fi
				done

				while [ $count -lt $ofields ]; do
				count=$(( count + 1 ))
				printf "%0*d" $fwidth 0
				done

				echo