local match = string.match;

module "jid"

function split(jid)

	if not jid then return; end

	local node, nodelen = match(jid, "^([^@]+)@()");

	local host, hostlen = match(jid, "^([^@/]+)()", nodelen)

	if node and not host then return nil, nil, nil; end

	local resource = match(jid, "^/(.+)$", hostlen);

	if (not host) or ((not resource) and #jid >= hostlen) then return nil, nil, nil; end

	return node, host, resource;

end

function bare(jid)

	local node, host = split(jid);

	if node and host then

		return node.."@"..host;

	elseif host then

		return host;

	end

	return nil;

end

return _M;