# ProteanOS Development Kit
# lib/getopt.sh
# Functions for parsing command-line options
#
# Copyright (C) 2013  Patrick "P. J." McDermott
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

[ "x${_GETOPT_SM+set}" = 'xset' ] && return 0
_GETOPT_SM=1

get_options()
{
	local optstring=
	local prefix=
	local opt=

	if [ "x${running_cmd}" = 'x' ]; then
		optstring="${OPTSTRING}"
		prefix='opt_'
	else
		eval "optstring=\"\${cmd_${running_cmd}_optstring}\""
		prefix="cmd_${running_cmd}_opt_"
	fi

	unset OPTARG
	while getopts "${optstring}" opt; do
		if [ "x${opt}" != 'x?' ]; then
			eval "${prefix}${opt}=\"\${OPTARG:-true}\""
		fi
		unset OPTARG
	done

	return 0
}