LICENSE.txt

BSD 2-Clause License

Copyright (c) 2022, Ribose Inc.
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice, this
  list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.


This module includes original pngcheck software [http://www.libpng.org/pub/png/apps/pngcheck.html]
that is distributed under the follwoing license:

   Copyright 1995-2020 by Alexander Lehmann <lehmann@usa.net>,
                          Andreas Dilger <adilger@enel.ucalgary.ca>,
                          Glenn Randers-Pehrson <randeg@alum.rpi.edu>,
                          Greg Roelofs <newt@pobox.com>,
                          John Bowler <jbowler@acm.org>,
                          Tom Lane <tgl@sss.pgh.pa.us>

   Permission to use, copy, modify, and distribute this software and its
   documentation for any purpose and without fee is hereby granted, provided
   that the above copyright notice appear in all copies and that both that
   copyright notice and this permission notice appear in supporting
   documentation.  This software is provided "as is" without express or
   implied warranty.


[This license applies to pngcheck.c and its associated makefiles and
 documentation in the main directory.  The files in the "gpl" subdirectory--
 specifically, pngsplit.c and png-fix-IDAT-windowsize.c--are licensed under the
 GNU General Public License.  The files in "amiga" subdirectory are Copyright
 2003 Simon Goodwin and were contributed without an explicit license statement,
 but insofar as the "gpl" subdirectory didn't exist at the time, it's safe to
 assume their intended license was similar to pngcheck's, just with Simon's
 copyright replacing the one above.]