#

# set -o noglob is assumed.

#

ex_rtl_check_path_vars() {

	local _vnames="${1}" _rc=0 _vname="" _vname_val=""; _status="";

	for _vname in ${_vnames}; do

		_vname_val="$(ex_rtl_get_var_unsafe "${_vname}")";

		if [ -z "${_vname_val}" ]; then

			_rc=1; _status="Error: variable \`${_vname}' is empty or unset."; break;

		elif [ "${_vname_val#* *}" != "${_vname_val}" ]; then

			_rc=2; _status="Error: variable \`${_vname}' contains one or more whitespace characters."; break;

		fi;

	done;

	return "${_rc}";

};

ex_rtl_clean_env() {

	local _env_vars_except="${1}" _env_var="" _env_vars="";

	_env_vars="$(export | sed -ne '/^export/{s/^export //;s/=.*$//p}')";

	for _env_var in ${_env_vars}; do

		if [ "${_env_var#DEFAULT_}" != "${_env_var}" ]\

		|| [ "${_env_var#PKG_}" != "${_env_var}" ]; then

			_env_vars_except="${_env_vars_except:+${_env_vars_except} }${_env_var}";

		fi;

	done;

	ex_rtl_unset_vars $(ex_rtl_lfilter "${_env_vars}" "${_env_vars_except}");

};

ex_rtl_lfilter() {

	local _list="${1}" _filter="${2}" _lnew="" _litem="" _litem_filter="" _filterfl="";

	if [ -z "${_filter}" ]; then

		echo "${_list}"; return 0;

	else for _litem in ${_list}; do

		_filterfl=0;

		for _litem_filter in ${_filter}; do

			if [ "${_litem_filter}" = "${_litem}" ]; then

				_filterfl=1; break;

			fi;

		done;

		if [ "${_filterfl:-0}" -eq 0 ]; then

			_lnew="${_lnew:+${_lnew} }${_litem}";

		fi;

	done; fi;

	echo "${_lnew}";

};

ex_rtl_lmatch() {

	local _cmp="${3}" IFS="${2}"; set -- ${1};

	while [ ${#} -gt 0 ]; do

		if [ "${1}" = "${_cmp}" ]; then

			return 0;

		fi; shift;

	done; return 1;

};

ex_rtl_lsearch() {

	local _list="${1}" _filter="${2}" _lnew="" _litem="" _litem_filter="";

	if [ -z "${_filter}" ]; then

		echo "${_list}"; return 0;

	else for _litem in ${_list}; do

		for _litem_filter in ${_filter}; do

			if [ "${_litem_filter}" = "${_litem}" ]; then

				_lnew="${_lnew:+${_lnew} }${_litem}";

				break;

			fi;

		done;

	done; fi;

	echo "${_lnew}";

};

ex_rtl_run_cmd_unsplit() {

	local _cmd="${1}" _cmdline="" _rc="" IFS; shift;

	while [ ${#} -gt 0 ]; do

		[ -n "${1}" ] &&\

			_cmdline="${_cmdline:+${_cmdline}:}${1}";

		shift;

	done;

	IFS=:; ${_cmd} ${_cmdline}; _rc=$?;

	return ${_rc};

};

ex_rtl_set_vars() {

	local _vname_dst="${1}" _vname_src_tmpls="${2}"			\

		_vars_set_vname="${3}" _vname_src _vars_set_tmp=""	\

		_vars_set_old="";

	for _vname_src in ${_vname_src_tmpls}; do

		_vname_src="${_vname_src}_${_vname_dst}";

		_vval_src="$(ex_rtl_get_var_unsafe "${_vname_src}")";

		if [ -n "${_vval_src}" ]; then

			ex_rtl_set_var_unsafe "PKG_${_vname_dst}" "${_vval_src}";

			_vars_set_tmp="${_vars_set_tmp:+${_vars_set_tmp} }PKG_${_vname_dst}";

		fi;

	done;

	_vars_set_old="$(ex_rtl_get_var_unsafe "${_vars_set_vname}")";

	ex_rtl_set_var_unsafe "${_vars_set_vname}"			\

		"${_vars_set_old:+${_vars_set_old} }${_vars_set_tmp}";

};

# vim:filetype=sh