route.link_list = xbt_str_split(lua_tostring(L, -1), ", \t\r\n");
if (xbt_dynar_is_empty(route.link_list))
xbt_dynar_push_as(route.link_list,char*,xbt_strdup(lua_tostring(L, -1)));
route.link_list = xbt_str_split(lua_tostring(L, -1), ", \t\r\n");
if (xbt_dynar_is_empty(route.link_list))
xbt_dynar_push_as(route.link_list,char*,xbt_strdup(lua_tostring(L, -1)));