calc - arbitrary precision calculator This file is Copyrighted ------------------------ This file is not covered under version 2.1 of the GNU LGPL. This file is covered under the following Copyright: Copyright (C) 1999-2023 Landon Curt Noll All rights reserved. Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. -=- Calc is covered by the GNU Lesser General Public License -------------------------------------------------------- Calc is open software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation version 2.1 of the License. Calc is several binary link libraries, several modules, associated interface definition files and scripts used to control its compilation and installation. Calc 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 Lesser General Public License for more details. A copy of the GNU Lesser General Public License is distributed with calc under the filename: COPYING-LGPL You may display this file by the calc command: help copying You may display the GNU Lesser General Public License by the calc command: help copying-lgpl You should have received a copy of the version 2.1 GNU Lesser General Public License with calc; if not, write to the following address: Free Software Foundation, Inc. 51 Franklin Street Fifth Floor Boston, MA 02110-1301 USA Calc's relationship to the GNU Lesser General Public License ------------------------------------------------------------ In section 0 of the GNU Lesser General Public License, one finds the following definition: The "Library", below, refers to any such software library or work which has been distributed under these terms. Calc is distributed under the terms of the GNU Lesser General Public License. In the same section 0, one also find the following: For a library, complete source code means all the source code for all modules it contains, plus any associated interface definition files, plus the scripts used to control compilation and installation of the library. There are at least two calc binary link libraries found in calc: libcalc.a libcustcalc.a Clearly all files that go into the creation of those binary link libraries are covered under the License. The "scripts used to control compilation and installation of the of the library" include: * Makefiles * source files created by the Makefiles * source code used in the creation of intermediate source files All of those files are covered under the License. The "associated interface definition files" are those files that: * show how the calc binary link libraries are used * test the validity of the binary link libraries * document routines found in the binary link libraries * show how one can interactively use the binary link libraries Calc provides an extensive set of files that perform the above functions. * files under the sample sub-directory * files under the help sub-directory * files under the lib sub-directory * the main calc.c file The "complete source code" includes ALL files shipped with calc, except for the exception files explicitly listed in the "Calc copyrights and exception files" section below. -=- Calc copyrights and exception files ----------------------------------- With the exception of the files listed below, Calc is covered under the following GNU Lesser General Public License Copyrights: Copyright (C) year David I. Bell Copyright (C) year David I. Bell and Landon Curt Noll Copyright (C) year David I. Bell and Ernest Bowen Copyright (C) year David I. Bell, Landon Curt Noll and Ernest Bowen Copyright (C) year Landon Curt Noll Copyright (C) year Ernest Bowen and Landon Curt Noll Copyright (C) year Ernest Bowen Copyright (C) year Petteri Kettunen and Landon Curt Noll Copyright (C) year Christoph Zurnieden Copyright (C) year Landon Curt Noll and Thomas Jones-Low Copyright (C) year Klaus Alexander Seistrup and Landon Curt Noll These files are not covered under one of the Copyrights listed above: sha1.c sha1.h COPYING COPYING-LGPL cal/screen.cal The file COPYING-LGPL, which contains a copy of the version 2.1 GNU Lesser General Public License, is itself Copyrighted by the Free Software Foundation, Inc. Please note that the Free Software Foundation, Inc. does NOT have a copyright over calc, only the COPYING-LGPL that is supplied with calc. This file, COPYING, is distributed under the Copyright found at the top of this file. It is important to note that you may distribute verbatim copies of this file but you may not modify this file. These files are covered under "The Unlicense": sha1.c sha1.h cal/dotest.cal cal/screen.cal "The Unlicense" is as follows: This is free and unencumbered software released into the public domain. Anyone is free to copy, modify, publish, use, compile, sell, or distribute this software, either in source code form or as a compiled binary, for any purpose, commercial or non-commercial, and by any means. In jurisdictions that recognize copyright laws, the author or authors of this software dedicate any and all copyright interest in the software to the public domain. We make this dedication for the benefit of the public at large and to the detriment of our heirs and successors. We intend this dedication to be an overt act of relinquishment in perpetuity of all present and future rights to this software under copyright law. 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 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. For more information, please refer to In all cases one may use and distribute these exception files freely. And because one may freely distribute the LGPL covered files, the entire calc source may be freely used and distributed. -=- General Copyleft and License info --------------------------------- For general information on Copylefts, see: http://www.gnu.org/copyleft/ For information on GNU Lesser General Public Licenses, see: http://www.gnu.org/copyleft/lesser.html http://www.gnu.org/copyleft/lesser.txt -=- Why calc did not use the GNU General Public License --------------------------------------------------- It has been suggested that one should consider using the GNU General Public License instead of the GNU Lesser General Public License: http://www.gnu.org/philosophy/why-not-lgpl.html As you can read in the above URL, there are times where a library cannot give free software any particular advantage. One of those times is when there is significantly similar versions available that are not covered under a Copyleft such as the GNU General Public License. The reason why calc was placed under the GNU Lesser General Public License is because for many years (1984 thru 1999), calc was offered without any form of Copyleft. At the time calc was placed under the GNU Lesser General Public License, a number of systems and distributions distributed calc without a Copyleft.