The source code is subject to the following academic license.
Note this is not an open source license.

Modifications and additions to original source code:
Copyright © 2021 Niels Jeppesen and Patrick Møller Jensen.
Original source code (hpf.h, previously pseudo.c):
Copyright © 2001. The Regents of the University of California (Regents).
All Rights Reserved.

Permission to use, copy, modify, and distribute this software and its
documentation for educational, research, and not-for-profit purposes,
without fee and without a signed licensing agreement, is hereby granted,
provided that the above copyright notice, this paragraph and the following
two paragraphs appear in all copies, modifications, and distributions.
Contact The Office of Technology Licensing, UC Berkeley, 2150 Shattuck
Avenue, Suite 510, Berkeley, CA 94720-1620, (510) 643-7201, for commercial
licensing opportunities. Created by Bala Chandran and Dorit S. Hochbaum,
Department of Industrial Engineering and Operations Research,
University of California, Berkeley.

IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,
ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
REGENTS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED
HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE
MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
