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- GNU GENERAL PUBLIC LICENSE
- **************************
-
- Version 2, June 1991
-
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.
- 675 Mass Ave, Cambridge, MA 02139, USA
-
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
- Preamble
- ========
-
- The licenses for most software are designed to take away your
- freedom to share and change it. By contrast, the GNU General Public
- License is intended to guarantee your freedom to share and change free
- software--to make sure the software is free for all its users. This
- General Public License applies to most of the Free Software
- Foundation's software and to any other program whose authors commit to
- using it. (Some other Free Software Foundation software is covered by
- the GNU Library General Public License instead.) You can apply it to
- your programs, too.
-
- When we speak of free software, we are referring to freedom, not
- price. Our General Public Licenses are designed to make sure that you
- have the freedom to distribute copies of free software (and charge for
- this service if you wish), that you receive source code or can get it
- if you want it, that you can change the software or use pieces of it
- in new free programs; and that you know you can do these things.
-
- To protect your rights, we need to make restrictions that forbid
- anyone to deny you these rights or to ask you to surrender the rights.
- These restrictions translate to certain responsibilities for you if you
- distribute copies of the software, or if you modify it.
-
- For example, if you distribute copies of such a program, whether
- gratis or for a fee, you must give the recipients all the rights that
- you have. You must make sure that they, too, receive or can get the
- source code. And you must show them these terms so they know their
- rights.
-
- We protect your rights with two steps: (1) copyright the software,
- and (2) offer you this license which gives you legal permission to
- copy, distribute and/or modify the software.
-
- Also, for each author's protection and ours, we want to make certain
- that everyone understands that there is no warranty for this free
- software. If the software is modified by someone else and passed on,
- we want its recipients to know that what they have is not the
- original, so that any problems introduced by others will not reflect
- on the original authors' reputations.
-
- Finally, any free program is threatened constantly by software
- patents. We wish to avoid the danger that redistributors of a free
- program will individually obtain patent licenses, in effect making the
- program proprietary. To prevent this, we have made it clear that any
- patent must be licensed for everyone's free use or not licensed at all.
-
- The precise terms and conditions for copying, distribution and
- modification follow.
-
- TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
-
- 1. This License applies to any program or other work which contains
- a notice placed by the copyright holder saying it may be
- distributed under the terms of this General Public License. The
- "Program", below, refers to any such program or work, and a "work
- based on the Program" means either the Program or any derivative
- work under copyright law: that is to say, a work containing the
- Program or a portion of it, either verbatim or with modifications
- and/or translated into another language. (Hereinafter,
- translation is included without limitation in the term
- "modification".) Each licensee is addressed as "you".
-
- Activities other than copying, distribution and modification
- are not covered by this License; they are outside its scope. The
- act of running the Program is not restricted, and the output from
- the Program is covered only if its contents constitute a work
- based on the Program (independent of having been made by running
- the Program). Whether that is true depends on what the Program
- does.
-
- 2. You may copy and distribute verbatim copies of the Program's
- source code as you receive it, in any medium, provided that you
- conspicuously and appropriately publish on each copy an
- appropriate copyright notice and disclaimer of warranty; keep
- intact all the notices that refer to this License and to the
- absence of any warranty; and give any other recipients of the
- Program a copy of this License along with the Program.
-
- You may charge a fee for the physical act of transferring a
- copy, and you may at your option offer warranty protection in
- exchange for a fee.
-
- 3. You may modify your copy or copies of the Program or any portion
- of it, thus forming a work based on the Program, and copy and
- distribute such modifications or work under the terms of Section 1
- above, provided that you also meet all of these conditions:
-
- a. You must cause the modified files to carry prominent notices
- stating that you changed the files and the date of any
- change.
-
- b. You must cause any work that you distribute or publish, that
- in whole or in part contains or is derived from the Program
- or any part thereof, to be licensed as a whole at no charge
- to all third parties under the terms of this License.
-
- c. If the modified program normally reads commands interactively
- when run, you must cause it, when started running for such
- interactive use in the most ordinary way, to print or
- display an announcement including an appropriate copyright
- notice and a notice that there is no warranty (or else,
- saying that you provide a warranty) and that users may
- redistribute the program under these conditions, and telling
- the user how to view a copy of this License. (Exception: if
- the Program itself is interactive but does not normally
- print such an announcement, your work based on the Program
- is not required to print an announcement.)
-
- These requirements apply to the modified work as a whole. If
- identifiable sections of that work are not derived from the
- Program, and can be reasonably considered independent and
- separate works in themselves, then this License, and its terms,
- do not apply to those sections when you distribute them as
- separate works. But when you distribute the same sections as
- part of a whole which is a work based on the Program, the
- distribution of the whole must be on the terms of this License,
- whose permissions for other licensees extend to the entire whole,
- and thus to each and every part regardless of who wrote it.
-
- Thus, it is not the intent of this section to claim rights or
- contest your rights to work written entirely by you; rather, the
- intent is to exercise the right to control the distribution of
- derivative or collective works based on the Program.
-
- In addition, mere aggregation of another work not based on the
- Program with the Program (or with a work based on the Program) on
- a volume of a storage or distribution medium does not bring the
- other work under the scope of this License.
-
- 4. You may copy and distribute the Program (or a work based on it,
- under Section 2) in object code or executable form under the
- terms of Sections 1 and 2 above provided that you also do one of
- the following:
-
- a. Accompany it with the complete corresponding machine-readable
- source code, which must be distributed under the terms of
- Sections 1 and 2 above on a medium customarily used for
- software interchange; or,
-
- b. Accompany it with a written offer, valid for at least three
- years, to give any third party, for a charge no more than
- your cost of physically performing source distribution, a
- complete machine-readable copy of the corresponding source
- code, to be distributed under the terms of Sections 1 and 2
- above on a medium customarily used for software interchange;
- or,
-
- c. Accompany it with the information you received as to the
- offer to distribute corresponding source code. (This
- alternative is allowed only for noncommercial distribution
- and only if you received the program in object code or
- executable form with such an offer, in accord with
- Subsection b above.)
-
- The source code for a work means the preferred form of the
- work for making modifications to it. For an executable work,
- 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
- executable. However, as a special exception, the source code
- distributed need not include anything that is normally
- distributed (in either source or binary form) with the major
- components (compiler, kernel, and so on) of the operating system
- on which the executable runs, unless that component itself
- accompanies the executable.
-
- If distribution of executable or object code is made by
- offering access to copy from a designated place, then offering
- equivalent access to copy the source code from the same place
- counts as distribution of the source code, even though third
- parties are not compelled to copy the source along with the
- object code.
-
- 5. You may not copy, modify, sublicense, or distribute the Program
- except as expressly provided under this License. Any attempt
- otherwise to copy, modify, sublicense or distribute the Program is
- void, and will automatically terminate your rights under this
- License. However, parties who have received copies, or rights,
- from you under this License will not have their licenses
- terminated so long as such parties remain in full compliance.
-
- 6. You are not required to accept this License, since you have not
- signed it. However, nothing else grants you permission to modify
- or distribute the Program or its derivative works. These actions
- are prohibited by law if you do not accept this License.
- Therefore, by modifying or distributing the Program (or any work
- based on the Program), you indicate your acceptance of this
- License to do so, and all its terms and conditions for copying,
- distributing or modifying the Program or works based on it.
-
- 7. Each time you redistribute the Program (or any work based on the
- Program), the recipient automatically receives a license from the
- original licensor to copy, distribute or modify the Program
- subject to these terms and conditions. You may not impose any
- further restrictions on the recipients' exercise of the rights
- granted herein. You are not responsible for enforcing compliance
- by third parties to this License.
-
- 8. If, as a consequence of a court judgment or allegation of patent
- infringement or for any other reason (not limited to patent
- issues), conditions are imposed on you (whether by court order,
- agreement or otherwise) that contradict the conditions of this
- License, they do not excuse you from the conditions of this
- License. If you cannot distribute so as to satisfy
- simultaneously your obligations under this License and any other
- pertinent obligations, then as a consequence you may not
- distribute the Program at all. For example, if a patent license
- would not permit royalty-free redistribution of the Program by
- all those who receive copies directly or indirectly through you,
- then the only way you could satisfy both it and this License
- would be to refrain entirely from distribution of the Program.
-
- If any portion of this section is held invalid or
- unenforceable under any particular circumstance, the balance of
- the section is intended to apply and the section as a whole is
- intended to apply in other circumstances.
-
- It is not the purpose of this section to induce you to
- infringe any patents or other property right claims or to contest
- validity of any such claims; this section has the sole purpose of
- protecting the integrity of the free software distribution
- system, which is implemented by public license practices. Many
- people have made generous contributions to the wide range of
- software distributed through that system in reliance on
- consistent application of that system; it is up to the
- author/donor to decide if he or she is willing to distribute
- software through any other system and a licensee cannot impose
- that choice.
-
- This section is intended to make thoroughly clear what is
- believed to be a consequence of the rest of this License.
-
- 9. If the distribution and/or use of the Program is restricted in
- certain countries either by patents or by copyrighted interfaces,
- the original copyright holder who places the Program under this
- License may add an explicit geographical distribution limitation
- excluding those countries, so that distribution is permitted only
- in or among countries not thus excluded. In such case, this
- License incorporates the limitation as if written in the body of
- this License.
-
- 10. The Free Software Foundation may publish revised and/or new
- versions of the General Public License from time to time. Such
- new versions will be similar in spirit to the present version,
- but may differ in detail to address new problems or concerns.
-
- Each version is given a distinguishing version number. If the
- Program specifies a version number of this License which applies
- to it and "any later version", you have the option of following
- the terms and conditions either of that version or of any later
- version published by the Free Software Foundation. If the
- Program does not specify a version number of this License, you
- may choose any version ever published by the Free Software
- Foundation.
-
- 11. If you wish to incorporate parts of the Program into other free
- programs whose distribution conditions are different, write to
- the author to ask for permission. For software which is
- copyrighted by the Free Software Foundation, write to the Free
- Software Foundation; we sometimes make exceptions for this. Our
- decision will be guided by the two goals of preserving the free
- status of all derivatives of our free software and of promoting
- the sharing and reuse of software generally.
-
- NO WARRANTY
-
- 12. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO
- WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE
- LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
- HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
- WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT
- NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE
- QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
- PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY
- SERVICING, REPAIR OR CORRECTION.
-
- 13. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
- WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY
- MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE
- LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL,
- INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR
- INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS
- OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
- YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH
- ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN
- ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
-
- END OF TERMS AND CONDITIONS
-
- Appendix: How to Apply These Terms to Your New Programs
- =======================================================
-
- If you develop a new program, and you want it to be of the greatest
- possible use to the public, the best way to achieve this is to make it
- free software which everyone can redistribute and change under these
- terms.
-
- To do so, attach the following notices to the program. It is safest
- to attach them to the start of each source file to most effectively
- convey the exclusion of warranty; and each file should have at least
- the "copyright" line and a pointer to where the full notice is found.
-
- ONE LINE TO GIVE THE PROGRAM'S NAME AND A BRIEF IDEA OF WHAT IT DOES.
- Copyright (C) 19YY NAME OF AUTHOR
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program 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 General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- Also add information on how to contact you by electronic and paper
- mail.
-
- If the program is interactive, make it output a short notice like
- this when it starts in an interactive mode:
-
- Gnomovision version 69, Copyright (C) 19YY NAME OF AUTHOR
- Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
- This is free software, and you are welcome to redistribute it
- under certain conditions; type `show c' for details.
-
- The hypothetical commands `show w' and `show c' should show the
- appropriate parts of the General Public License. Of course, the
- commands you use may be called something other than `show w' and `show
- c'; they could even be mouse-clicks or menu items--whatever suits your
- program.
-
- You should also get your employer (if you work as a programmer) or
- your school, if any, to sign a "copyright disclaimer" for the program,
- if necessary. Here is a sample; alter the names:
-
- Yoyodyne, Inc., hereby disclaims all copyright interest in the program
- `Gnomovision' (which makes passes at compilers) written by James Hacker.
-
- SIGNATURE OF TY COON, 1 April 1989
- Ty Coon, President of Vice
-
- This General Public License does not permit incorporating your
- program into proprietary programs. If your program is a subroutine
- library, you may consider it more useful to permit linking proprietary
- applications with the library. If this is what you want to do, use
- the GNU Library General Public License instead of this License.
-
-