girdap is made available under GNU general public license that allows any use of the source code without any obligation.
GNU General Public License allows you to use, redistribute and/or modify the code as you wish; provided that you must pass on to the recipients the same freedoms you received; namely the source code.
Following is the statement that comes along with the source code.
Copyright (C) 2015, Eray Uzgoren 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/.