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Please refer to the following URL for further information of
GNU General Public License Version 2.
http://www.gnu.org/licenses/gpl-2.0.html
Please refer to the following URL for further information of
GNU Library General Public License Version 2.1.
http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 Lesser 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.
GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION
AND MODIFICATION
0. 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.
1. 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.
2. 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.
3. 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
offeri ng e quiv al ent a cce ss t o co py t he so urc e co de f rom 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.
4. 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
com
pliance.
5. 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.
6 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.
7. 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.
8. 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.
9. 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.
10. 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
11. 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
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