1 This distribution is free software; you can redistribute it and/or modify it
2 under the terms of either:
4 a) the GNU General Public License as published by the Free Software Foundation;
5 either version 1, or (at your option) any later version; or
7 b) the "Artistic License" which comes with this distribution.
9 This distribution is distributed in the hope that it will be useful, but WITHOUT
10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11 FOR A PARTICULAR PURPOSE. See either the GNU General Public License or the
12 Artistic License for more details.
14 You should have received a copy of the GNU General Public License along with
15 this distribution in the file named "Copying". If not, write to the Free
16 Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 02110-1301, USA or visit their web page on the internet at
18 https://www.gnu.org/copyleft/gpl.html or the Perl web page at
19 https://dev.perl.org/licenses/gpl1.html.
21 You should also have received a copy of the Artistic License with this
22 distribution, in the file named "Artistic". If not, visit the Perl web page on
23 the internet at https://dev.perl.org/licenses/artistic.html.
25 ===========================================================================
27 GNU GENERAL PUBLIC LICENSE
28 Version 1, February 1989
30 Copyright (C) 1989 Free Software Foundation, Inc.
31 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
33 Everyone is permitted to copy and distribute verbatim copies
34 of this license document, but changing it is not allowed.
38 The license agreements of most software companies try to keep users
39 at the mercy of those companies. By contrast, our General Public
40 License is intended to guarantee your freedom to share and change free
41 software--to make sure the software is free for all its users. The
42 General Public License applies to the Free Software Foundation's
43 software and to any other program whose authors commit to using it.
44 You can use it for your programs, too.
46 When we speak of free software, we are referring to freedom, not
47 price. Specifically, the General Public License is designed to make
48 sure that you have the freedom to give away or sell copies of free
49 software, that you receive source code or can get it if you want it,
50 that you can change the software or use pieces of it in new free
51 programs; and that you know you can do these things.
53 To protect your rights, we need to make restrictions that forbid
54 anyone to deny you these rights or to ask you to surrender the rights.
55 These restrictions translate to certain responsibilities for you if you
56 distribute copies of the software, or if you modify it.
58 For example, if you distribute copies of a such a program, whether
59 gratis or for a fee, you must give the recipients all the rights that
60 you have. You must make sure that they, too, receive or can get the
61 source code. And you must tell them their rights.
63 We protect your rights with two steps: (1) copyright the software, and
64 (2) offer you this license which gives you legal permission to copy,
65 distribute and/or modify the software.
67 Also, for each author's protection and ours, we want to make certain
68 that everyone understands that there is no warranty for this free
69 software. If the software is modified by someone else and passed on, we
70 want its recipients to know that what they have is not the original, so
71 that any problems introduced by others will not reflect on the original
74 The precise terms and conditions for copying, distribution and
77 GNU GENERAL PUBLIC LICENSE
78 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
80 0. This License Agreement applies to any program or other work which
81 contains a notice placed by the copyright holder saying it may be
82 distributed under the terms of this General Public License. The
83 "Program", below, refers to any such program or work, and a "work based
84 on the Program" means either the Program or any work containing the
85 Program or a portion of it, either verbatim or with modifications. Each
86 licensee is addressed as "you".
88 1. You may copy and distribute verbatim copies of the Program's source
89 code as you receive it, in any medium, provided that you conspicuously and
90 appropriately publish on each copy an appropriate copyright notice and
91 disclaimer of warranty; keep intact all the notices that refer to this
92 General Public License and to the absence of any warranty; and give any
93 other recipients of the Program a copy of this General Public License
94 along with the Program. You may charge a fee for the physical act of
97 2. You may modify your copy or copies of the Program or any portion of
98 it, and copy and distribute such modifications under the terms of Paragraph
99 1 above, provided that you also do the following:
101 a) cause the modified files to carry prominent notices stating that
102 you changed the files and the date of any change; and
104 b) cause the whole of any work that you distribute or publish, that
105 in whole or in part contains the Program or any part thereof, either
106 with or without modifications, to be licensed at no charge to all
107 third parties under the terms of this General Public License (except
108 that you may choose to grant warranty protection to some or all
109 third parties, at your option).
111 c) If the modified program normally reads commands interactively when
112 run, you must cause it, when started running for such interactive use
113 in the simplest and most usual way, to print or display an
114 announcement including an appropriate copyright notice and a notice
115 that there is no warranty (or else, saying that you provide a
116 warranty) and that users may redistribute the program under these
117 conditions, and telling the user how to view a copy of this General
120 d) You may charge a fee for the physical act of transferring a
121 copy, and you may at your option offer warranty protection in
124 Mere aggregation of another independent work with the Program (or its
125 derivative) on a volume of a storage or distribution medium does not bring
126 the other work under the scope of these terms.
128 3. You may copy and distribute the Program (or a portion or derivative of
129 it, under Paragraph 2) in object code or executable form under the terms of
130 Paragraphs 1 and 2 above provided that you also do one of the following:
132 a) accompany it with the complete corresponding machine-readable
133 source code, which must be distributed under the terms of
134 Paragraphs 1 and 2 above; or,
136 b) accompany it with a written offer, valid for at least three
137 years, to give any third party free (except for a nominal charge
138 for the cost of distribution) a complete machine-readable copy of the
139 corresponding source code, to be distributed under the terms of
140 Paragraphs 1 and 2 above; or,
142 c) accompany it with the information you received as to where the
143 corresponding source code may be obtained. (This alternative is
144 allowed only for noncommercial distribution and only if you
145 received the program in object code or executable form alone.)
147 Source code for a work means the preferred form of the work for making
148 modifications to it. For an executable file, complete source code means
149 all the source code for all modules it contains; but, as a special
150 exception, it need not include source code for modules which are standard
151 libraries that accompany the operating system on which the executable
152 file runs, or for standard header files or definitions files that
153 accompany that operating system.
155 4. You may not copy, modify, sublicense, distribute or transfer the
156 Program except as expressly provided under this General Public License.
157 Any attempt otherwise to copy, modify, sublicense, distribute or transfer
158 the Program is void, and will automatically terminate your rights to use
159 the Program under this License. However, parties who have received
160 copies, or rights to use copies, from you under this General Public
161 License will not have their licenses terminated so long as such parties
162 remain in full compliance.
164 5. By copying, distributing or modifying the Program (or any work based
165 on the Program) you indicate your acceptance of this license to do so,
166 and all its terms and conditions.
168 6. Each time you redistribute the Program (or any work based on the
169 Program), the recipient automatically receives a license from the original
170 licensor to copy, distribute or modify the Program subject to these
171 terms and conditions. You may not impose any further restrictions on the
172 recipients' exercise of the rights granted herein.
174 7. The Free Software Foundation may publish revised and/or new versions
175 of the General Public License from time to time. Such new versions will
176 be similar in spirit to the present version, but may differ in detail to
177 address new problems or concerns.
179 Each version is given a distinguishing version number. If the Program
180 specifies a version number of the license which applies to it and "any
181 later version", you have the option of following the terms and conditions
182 either of that version or of any later version published by the Free
183 Software Foundation. If the Program does not specify a version number of
184 the license, you may choose any version ever published by the Free Software
187 8. If you wish to incorporate parts of the Program into other free
188 programs whose distribution conditions are different, write to the author
189 to ask for permission. For software which is copyrighted by the Free
190 Software Foundation, write to the Free Software Foundation; we sometimes
191 make exceptions for this. Our decision will be guided by the two goals
192 of preserving the free status of all derivatives of our free software and
193 of promoting the sharing and reuse of software generally.
197 9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
198 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
199 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
200 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
201 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
202 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
203 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
204 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
205 REPAIR OR CORRECTION.
207 10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
208 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
209 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
210 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
211 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
212 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
213 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
214 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
215 POSSIBILITY OF SUCH DAMAGES.
217 END OF TERMS AND CONDITIONS
219 Appendix: How to Apply These Terms to Your New Programs
221 If you develop a new program, and you want it to be of the greatest
222 possible use to humanity, the best way to achieve this is to make it
223 free software which everyone can redistribute and change under these
226 To do so, attach the following notices to the program. It is safest to
227 attach them to the start of each source file to most effectively convey
228 the exclusion of warranty; and each file should have at least the
229 "copyright" line and a pointer to where the full notice is found.
231 <one line to give the program's name and a brief idea of what it does.>
232 Copyright (C) 19yy <name of author>
234 This program is free software; you can redistribute it and/or modify
235 it under the terms of the GNU General Public License as published by
236 the Free Software Foundation; either version 1, or (at your option)
239 This program is distributed in the hope that it will be useful,
240 but WITHOUT ANY WARRANTY; without even the implied warranty of
241 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
242 GNU General Public License for more details.
244 You should have received a copy of the GNU General Public License
245 along with this program; if not, write to the Free Software
246 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
249 Also add information on how to contact you by electronic and paper mail.
251 If the program is interactive, make it output a short notice like this
252 when it starts in an interactive mode:
254 Gnomovision version 69, Copyright (C) 19xx name of author
255 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
256 This is free software, and you are welcome to redistribute it
257 under certain conditions; type `show c' for details.
259 The hypothetical commands `show w' and `show c' should show the
260 appropriate parts of the General Public License. Of course, the
261 commands you use may be called something other than `show w' and `show
262 c'; they could even be mouse-clicks or menu items--whatever suits your
265 You should also get your employer (if you work as a programmer) or your
266 school, if any, to sign a "copyright disclaimer" for the program, if
267 necessary. Here a sample; alter the names:
269 Yoyodyne, Inc., hereby disclaims all copyright interest in the
270 program `Gnomovision' (a program to direct compilers to make passes
271 at assemblers) written by James Hacker.
273 <signature of Ty Coon>, 1 April 1989
274 Ty Coon, President of Vice
276 That's all there is to it!
278 ---------------------------------------------------------------------------
280 The "Artistic License"
284 The intent of this document is to state the conditions under which a
285 Package may be copied, such that the Copyright Holder maintains some
286 semblance of artistic control over the development of the package,
287 while giving the users of the package the right to use and distribute
288 the Package in a more-or-less customary fashion, plus the right to make
289 reasonable modifications.
293 "Package" refers to the collection of files distributed by the
294 Copyright Holder, and derivatives of that collection of files
295 created through textual modification.
297 "Standard Version" refers to such a Package if it has not been
298 modified, or has been modified in accordance with the wishes
299 of the Copyright Holder as specified below.
301 "Copyright Holder" is whoever is named in the copyright or
302 copyrights for the package.
304 "You" is you, if you're thinking about copying or distributing
307 "Reasonable copying fee" is whatever you can justify on the
308 basis of media cost, duplication charges, time of people involved,
309 and so on. (You will not be required to justify it to the
310 Copyright Holder, but only to the computing community at large
311 as a market that must bear the fee.)
313 "Freely Available" means that no fee is charged for the item
314 itself, though there may be fees involved in handling the item.
315 It also means that recipients of the item may redistribute it
316 under the same conditions they received it.
318 1. You may make and give away verbatim copies of the source form of the
319 Standard Version of this Package without restriction, provided that you
320 duplicate all of the original copyright notices and associated disclaimers.
322 2. You may apply bug fixes, portability fixes and other modifications
323 derived from the Public Domain or from the Copyright Holder. A Package
324 modified in such a way shall still be considered the Standard Version.
326 3. You may otherwise modify your copy of this Package in any way, provided
327 that you insert a prominent notice in each changed file stating how and
328 when you changed that file, and provided that you do at least ONE of the
331 a) place your modifications in the Public Domain or otherwise make them
332 Freely Available, such as by posting said modifications to Usenet or
333 an equivalent medium, or placing the modifications on a major archive
334 site such as uunet.uu.net, or by allowing the Copyright Holder to include
335 your modifications in the Standard Version of the Package.
337 b) use the modified Package only within your corporation or organization.
339 c) rename any non-standard executables so the names do not conflict
340 with standard executables, which must also be provided, and provide
341 a separate manual page for each non-standard executable that clearly
342 documents how it differs from the Standard Version.
344 d) make other distribution arrangements with the Copyright Holder.
346 4. You may distribute the programs of this Package in object code or
347 executable form, provided that you do at least ONE of the following:
349 a) distribute a Standard Version of the executables and library files,
350 together with instructions (in the manual page or equivalent) on where
351 to get the Standard Version.
353 b) accompany the distribution with the machine-readable source of
354 the Package with your modifications.
356 c) give non-standard executables non-standard names, and clearly
357 document the differences in manual pages (or equivalent), together
358 with instructions on where to get the Standard Version.
360 d) make other distribution arrangements with the Copyright Holder.
362 5. You may charge a reasonable copying fee for any distribution of this
363 Package. You may charge any fee you choose for support of this
364 Package. You may not charge a fee for this Package itself. However,
365 you may distribute this Package in aggregate with other (possibly
366 commercial) programs as part of a larger (possibly commercial) software
367 distribution provided that you do not advertise this Package as a
368 product of your own. You may embed this Package's interpreter within
369 an executable of yours (by linking); this shall be construed as a mere
370 form of aggregation, provided that the complete Standard Version of the
371 interpreter is so embedded.
373 6. The scripts and library files supplied as input to or produced as
374 output from the programs of this Package do not automatically fall
375 under the copyright of this Package, but belong to whoever generated
376 them, and may be sold commercially, and may be aggregated with this
377 Package. If such scripts or library files are aggregated with this
378 Package via the so-called "undump" or "unexec" methods of producing a
379 binary executable image, then distribution of such an image shall
380 neither be construed as a distribution of this Package nor shall it
381 fall under the restrictions of Paragraphs 3 and 4, provided that you do
382 not represent such an executable image as a Standard Version of this
385 7. C subroutines (or comparably compiled subroutines in other
386 languages) supplied by you and linked into this Package in order to
387 emulate subroutines and variables of the language defined by this
388 Package shall not be considered part of this Package, but are the
389 equivalent of input as in Paragraph 6, provided these subroutines do
390 not change the language in any way that would cause it to fail the
391 regression tests for the language.
393 8. Aggregation of this Package with a commercial distribution is always
394 permitted provided that the use of this Package is embedded; that is,
395 when no overt attempt is made to make this Package's interfaces visible
396 to the end user of the commercial distribution. Such use shall not be
397 construed as a distribution of this Package.
399 9. The name of the Copyright Holder may not be used to endorse or promote
400 products derived from this software without specific prior written permission.
402 10. THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR
403 IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
404 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.