Licenses
========

DFHack is distributed under the Zlib license, with some MIT- and BSD-licensed components.  These licenses protect your right to use DFHack for any purpose, distribute copies, and so on.

The core, plugins, scripts, and other DFHack code all use the ZLib license unless noted otherwise.  By contributing to DFHack, authors release the contributed work under this license.

DFHack also draws on several external packages. Their licenses are summarised here and reproduced below.

+-----------------+---------------+---------------------------------------------------------------------------------------------------------+
| Component       | License       | Copyright                                                                                               |
|=================|===============|=========================================================================================================|
| DFHack          | Zlib          | (c) 2009-2012, Petr Mrázek                                                                              |
+-----------------+---------------+---------------------------------------------------------------------------------------------------------+
| clsocket        | BSD 3-clause  | (c) 2007-2009, CarrierLabs, LLC.                                                                        |
+-----------------+---------------+---------------------------------------------------------------------------------------------------------+
| dirent          | MIT           | (c) 2006, Toni Ronkko                                                                                   |
+-----------------+---------------+---------------------------------------------------------------------------------------------------------+
| JSON.lua        | CC-BY-SA      | (c) 2010-2014, Jeffrey Friedl                                                                           |
+-----------------+---------------+---------------------------------------------------------------------------------------------------------+
| jsoncpp         | MIT           | (c) 2007-2010, Baptiste Lepilleur                                                                       |
+-----------------+---------------+---------------------------------------------------------------------------------------------------------+
| libexpat        | MIT           | (c) 1998-2000 Thai Open Source Software Center Ltd and Clark Cooper (c) 2001-2019 Expat maintainers     |
+-----------------+---------------+---------------------------------------------------------------------------------------------------------+
| libzip          | BSD 3-clause  | (c) 1999-2020 Dieter Baron and Thomas Klausner                                                          |
+-----------------+---------------+---------------------------------------------------------------------------------------------------------+
| linenoise       | BSD 2-clause  | (c) 2010, Salvatore Sanfilippo & Pieter Noordhuis                                                       |
+-----------------+---------------+---------------------------------------------------------------------------------------------------------+
| lua             | MIT           | (c) 1994-2008, Lua.org, PUC-Rio.                                                                        |
+-----------------+---------------+---------------------------------------------------------------------------------------------------------+
| luacov          | MIT           | (c) 2007 - 2018 Hisham Muhammad                                                                         |
+-----------------+---------------+---------------------------------------------------------------------------------------------------------+
| luafilesystem   | MIT           | (c) 2003-2014, Kepler Project                                                                           |
+-----------------+---------------+---------------------------------------------------------------------------------------------------------+
| lua-profiler    | MIT           | (c) 2002,2003,2004 Pepperfish                                                                           |
+-----------------+---------------+---------------------------------------------------------------------------------------------------------+
| protobuf        | BSD 3-clause  | (c) 2008, Google Inc.                                                                                   |
+-----------------+---------------+---------------------------------------------------------------------------------------------------------+
| tinythread      | Zlib          | (c) 2010, Marcus Geelnard                                                                               |
+-----------------+---------------+---------------------------------------------------------------------------------------------------------+
| tinyxml         | Zlib          | (c) 2000-2006, Lee Thomason                                                                             |
+-----------------+---------------+---------------------------------------------------------------------------------------------------------+
| UTF-8-decoder   | MIT           | (c) 2008-2010, Bjoern Hoehrmann                                                                         |
+-----------------+---------------+---------------------------------------------------------------------------------------------------------+
| xlsxio          | MIT           | (c) 2016-2020, Brecht Sanders                                                                           |
+-----------------+---------------+---------------------------------------------------------------------------------------------------------+
| alt-getopt      | MIT           | (c) 2009 Aleksey Cheusov                                                                                |
+-----------------+---------------+---------------------------------------------------------------------------------------------------------+


Zlib License
------------

See https://en.wikipedia.org/wiki/Zlib_License

   This software is provided 'as-is', without any express or implied
   warranty. In no event will the authors be held liable for any
   damages arising from the use of this software.

   Permission is granted to anyone to use this software for any
   purpose, including commercial applications, and to alter it and
   redistribute it freely, subject to the following restrictions:

   1. The origin of this software must not be misrepresented; you must
      not claim that you wrote the original software. If you use this
      software in a product, an acknowledgment in the product
      documentation would be appreciated but is not required.

   2. Altered source versions must be plainly marked as such, and
      must not be misrepresented as being the original software.

   3. This notice may not be removed or altered from any source
      distribution.


MIT License
-----------

See https://en.wikipedia.org/wiki/MIT_License

   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
   "Software"), to deal in the Software without restriction, including
   without limitation the rights to use, copy, modify, merge, publish,
   distribute, sublicense, and/or sell copies of the Software, and to
   permit persons to whom the Software is furnished to do so, subject to
   the following conditions:

   The above copyright notice and this permission notice shall be included
   in all copies or substantial portions of the Software.

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.


BSD Licenses
------------

See https://en.wikipedia.org/wiki/BSD_licenses

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

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

    2. 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.

"linenoise" adds no further clauses.

"protobuf" adds the following clause:

   3. Neither the name of Google Inc. nor the names of its
      contributors may be used to endorse or promote products derived
      from this software without specific prior written permission.

"clsocket" adds the following clauses:

   3. The name of the author may not be used to endorse or promote
      products derived from this software without specific prior
      written permission.

   4. The name "CarrierLabs" must not be used to endorse or promote
      products derived from this software without prior written
      permission. For written permission, please contact
      mark@carrierlabs.com
