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Copyright (C) 1989-2009 Free Software Foundation, Inc.

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<P>
Permission is granted to make and distribute verbatim copies of
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are preserved on all copies.

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<P>
Permission is granted to copy and distribute modified versions of this
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exactly as in the original, and provided that the entire resulting
derived work is distributed under the terms of a permission notice
identical to this one.

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Permission is granted to copy and distribute translations of this manual
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except that the section entitled ���GNU General Public License��� may be
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<H1><A NAME="SEC1" HREF="gperf_toc.html#TOC1">GNU GENERAL PUBLIC LICENSE</A></H1>
<P>
Version 3, 29 June 2007

</P>


<PRE>
Copyright (C) 2007 Free Software Foundation, Inc. <A HREF="http://fsf.org/">http://fsf.org/</A>

Everyone is permitted to copy and distribute verbatim copies of this
license document, but changing it is not allowed.
</PRE>


<H2>1.0  Preamble</H2>

<P>
The GNU General Public License is a free, copyleft license for
software and other kinds of works.

</P>
<P>
The licenses for most software and other practical works are designed
to take away your freedom to share and change the works.  By contrast,
the GNU General Public License is intended to guarantee your freedom
to share and change all versions of a program--to make sure it remains
free software for all its users.  We, the Free Software Foundation,
use the GNU General Public License for most of our software; it
applies also to any other work released this way by its authors.  You
can apply it to your programs, too.

</P>
<P>
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
them 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.

</P>
<P>
To protect your rights, we need to prevent others from denying you
these rights or asking you to surrender the rights.  Therefore, you
have certain responsibilities if you distribute copies of the
software, or if you modify it: responsibilities to respect the freedom
of others.

</P>
<P>
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must pass on to the recipients the same
freedoms that you received.  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.

</P>
<P>
Developers that use the GNU GPL protect your rights with two steps:
(1) assert copyright on the software, and (2) offer you this License
giving you legal permission to copy, distribute and/or modify it.

</P>
<P>
For the developers' and authors' protection, the GPL clearly explains
that there is no warranty for this free software.  For both users' and
authors' sake, the GPL requires that modified versions be marked as
changed, so that their problems will not be attributed erroneously to
authors of previous versions.

</P>
<P>
Some devices are designed to deny users access to install or run
modified versions of the software inside them, although the
manufacturer can do so.  This is fundamentally incompatible with the
aim of protecting users' freedom to change the software.  The
systematic pattern of such abuse occurs in the area of products for
individuals to use, which is precisely where it is most unacceptable.
Therefore, we have designed this version of the GPL to prohibit the
practice for those products.  If such problems arise substantially in
other domains, we stand ready to extend this provision to those
domains in future versions of the GPL, as needed to protect the
freedom of users.

</P>
<P>
Finally, every program is threatened constantly by software patents.
States should not allow patents to restrict development and use of
software on general-purpose computers, but in those that do, we wish
to avoid the special danger that patents applied to a free program
could make it effectively proprietary.  To prevent this, the GPL
assures that patents cannot be used to render the program non-free.

</P>
<P>
The precise terms and conditions for copying, distribution and
modification follow.

</P>

<H2>1.1  TERMS AND CONDITIONS</H2>


<OL>
<LI>Definitions.

���This License��� refers to version 3 of the GNU General Public License.

���Copyright��� also means copyright-like laws that apply to other kinds
of works, such as semiconductor masks.

���The Program��� refers to any copyrightable work licensed under this
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To ���modify��� a work means to copy from or adapt all or part of the work
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A ���covered work��� means either the unmodified Program or a work based
on the Program.

To ���propagate��� a work means to do anything with it that, without
permission, would make you directly or secondarily liable for
infringement under applicable copyright law, except executing it on a
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public, and in some countries other activities as well.

To ���convey��� a work means any kind of propagation that enables other
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An interactive user interface displays ���Appropriate Legal Notices��� to
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<LI>Source Code.

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A ���Standard Interface��� means an interface that either is an official
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The ���System Libraries��� of an executable work include anything, other
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The ���Corresponding Source��� for a work in object code form means all
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The Corresponding Source for a work in source code form is that same
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<LI>Basic Permissions.

All rights granted under this License are granted for the term of
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You may make, run and propagate covered works that you do not convey,
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When you convey a covered work, you waive any legal power to forbid
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You may convey verbatim copies of the Program's source code as you
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keep intact all notices stating that this License and any
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keep intact all notices of the absence of any warranty; and give all
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You may charge any price or no price for each copy that you convey,
and you may offer support or warranty protection for a fee.

<LI>Conveying Modified Source Versions.

You may convey a work based on the Program, or the modifications to
produce it from the Program, in the form of source code under the
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<OL>
<LI>

The work must carry prominent notices stating that you modified it,
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The work must carry prominent notices stating that it is released
under this License and any conditions added under section 7.  This
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<LI>

You must license the entire work, as a whole, under this License to
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to the whole of the work, and all its parts, regardless of how they
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<LI>

If the work has interactive user interfaces, each must display
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</OL>

A compilation of a covered work with other separate and independent
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and which are not combined with it such as to form a larger program,
in or on a volume of a storage or distribution medium, is called an
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used to limit the access or legal rights of the compilation's users
beyond what the individual works permit.  Inclusion of a covered work
in an aggregate does not cause this License to apply to the other
parts of the aggregate.

<LI>Conveying Non-Source Forms.

You may convey a covered work in object code form under the terms of
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<OL>
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Convey the object code in, or embodied in, a physical product
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Convey the object code in, or embodied in, a physical product
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offer spare parts or customer support for that product model, to give
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covered by this License, on a durable physical medium customarily used
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6b.

<LI>

Convey the object code by offering access from a designated place
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<LI>

Convey the object code using peer-to-peer transmission, provided you
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</OL>

A separable portion of the object code, whose source code is excluded
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A ���User Product��� is either (1) a ���consumer product���, which means any
tangible personal property which is normally used for personal,
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���Installation Information��� for a User Product means any methods,
procedures, authorization keys, or other information required to
install and execute modified versions of a covered work in that User
Product from a modified version of its Corresponding Source.  The
information must suffice to ensure that the continued functioning of
the modified object code is in no case prevented or interfered with
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If you convey an object code work under this section in, or with, or
specifically for use in, a User Product, and the conveying occurs as
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User Product is transferred to the recipient in perpetuity or for a
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if neither you nor any third party retains the ability to install
modified object code on the User Product (for example, the work has
been installed in ROM).

The requirement to provide Installation Information does not include a
requirement to continue to provide support service, warranty, or
updates for a work that has been modified or installed by the
recipient, or for the User Product in which it has been modified or
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or violates the rules and protocols for communication across the
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Corresponding Source conveyed, and Installation Information provided,
in accord with this section must be in a format that is publicly
documented (and with an implementation available to the public in
source code form), and must require no special password or key for
unpacking, reading or copying.

<LI>Additional Terms.

���Additional permissions��� are terms that supplement the terms of this
License by making exceptions from one or more of its conditions.
Additional permissions that are applicable to the entire Program shall
be treated as though they were included in this License, to the extent
that they are valid under applicable law.  If additional permissions
apply only to part of the Program, that part may be used separately
under those permissions, but the entire Program remains governed by
this License without regard to the additional permissions.

When you convey a copy of a covered work, you may at your option
remove any additional permissions from that copy, or from any part of
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removal in certain cases when you modify the work.)  You may place
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Notwithstanding any other provision of this License, for material you
add to a covered work, you may (if authorized by the copyright holders
of that material) supplement the terms of this License with terms:


<OL>
<LI>

Disclaiming warranty or limiting liability differently from the terms
of sections 15 and 16 of this License; or

<LI>

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<LI>

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requiring that modified versions of such material be marked in
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<LI>

Limiting the use for publicity purposes of names of licensors or
authors of the material; or

<LI>

Declining to grant rights under trademark law for use of some trade
names, trademarks, or service marks; or

<LI>

Requiring indemnification of licensors and authors of that material by
anyone who conveys the material (or modified versions of it) with
contractual assumptions of liability to the recipient, for any
liability that these contractual assumptions directly impose on those
licensors and authors.
</OL>

All other non-permissive additional terms are considered ���further
restrictions��� within the meaning of section 10.  If the Program as you
received it, or any part of it, contains a notice stating that it is
governed by this License along with a term that is a further
restriction, you may remove that term.  If a license document contains
a further restriction but permits relicensing or conveying under this
License, you may add to a covered work material governed by the terms
of that license document, provided that the further restriction does
not survive such relicensing or conveying.

If you add terms to a covered work in accord with this section, you
must place, in the relevant source files, a statement of the
additional terms that apply to those files, or a notice indicating
where to find the applicable terms.

Additional terms, permissive or non-permissive, may be stated in the
form of a separately written license, or stated as exceptions; the
above requirements apply either way.

<LI>Termination.

You may not propagate or modify a covered work except as expressly
provided under this License.  Any attempt otherwise to propagate or
modify it is void, and will automatically terminate your rights under
this License (including any patent licenses granted under the third
paragraph of section 11).

However, if you cease all violation of this License, then your license
from a particular copyright holder is reinstated (a) provisionally,
unless and until the copyright holder explicitly and finally
terminates your license, and (b) permanently, if the copyright holder
fails to notify you of the violation by some reasonable means prior to
60 days after the cessation.

Moreover, your license from a particular copyright holder is
reinstated permanently if the copyright holder notifies you of the
violation by some reasonable means, this is the first time you have
received notice of violation of this License (for any work) from that
copyright holder, and you cure the violation prior to 30 days after
your receipt of the notice.

Termination of your rights under this section does not terminate the
licenses of parties who have received copies or rights from you under
this License.  If your rights have been terminated and not permanently
reinstated, you do not qualify to receive new licenses for the same
material under section 10.

<LI>Acceptance Not Required for Having Copies.

You are not required to accept this License in order to receive or run
a copy of the Program.  Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance.  However,
nothing other than this License grants you permission to propagate or
modify any covered work.  These actions infringe copyright if you do
not accept this License.  Therefore, by modifying or propagating a
covered work, you indicate your acceptance of this License to do so.

<LI>Automatic Licensing of Downstream Recipients.

Each time you convey a covered work, the recipient automatically
receives a license from the original licensors, to run, modify and
propagate that work, subject to this License.  You are not responsible
for enforcing compliance by third parties with this License.

An ���entity transaction��� is a transaction transferring control of an
organization, or substantially all assets of one, or subdividing an
organization, or merging organizations.  If propagation of a covered
work results from an entity transaction, each party to that
transaction who receives a copy of the work also receives whatever
licenses to the work the party's predecessor in interest had or could
give under the previous paragraph, plus a right to possession of the
Corresponding Source of the work from the predecessor in interest, if
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You may not impose any further restrictions on the exercise of the
rights granted or affirmed under this License.  For example, you may
not impose a license fee, royalty, or other charge for exercise of
rights granted under this License, and you may not initiate litigation
(including a cross-claim or counterclaim in a lawsuit) alleging that
any patent claim is infringed by making, using, selling, offering for
sale, or importing the Program or any portion of it.

<LI>Patents.

A ���contributor��� is a copyright holder who authorizes use under this
License of the Program or a work on which the Program is based.  The
work thus licensed is called the contributor's ���contributor version���.

A contributor's ���essential patent claims��� are all patent claims owned
or controlled by the contributor, whether already acquired or
hereafter acquired, that would be infringed by some manner, permitted
by this License, of making, using, or selling its contributor version,
but do not include claims that would be infringed only as a
consequence of further modification of the contributor version.  For
purposes of this definition, ���control��� includes the right to grant
patent sublicenses in a manner consistent with the requirements of
this License.

Each contributor grants you a non-exclusive, worldwide, royalty-free
patent license under the contributor's essential patent claims, to
make, use, sell, offer for sale, import and otherwise run, modify and
propagate the contents of its contributor version.

In the following three paragraphs, a ���patent license��� is any express
agreement or commitment, however denominated, not to enforce a patent
(such as an express permission to practice a patent or covenant not to
sue for patent infringement).  To ���grant��� such a patent license to a
party means to make such an agreement or commitment not to enforce a
patent against the party.

If you convey a covered work, knowingly relying on a patent license,
and the Corresponding Source of the work is not available for anyone
to copy, free of charge and under the terms of this License, through a
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available, or (2) arrange to deprive yourself of the benefit of the
patent license for this particular work, or (3) arrange, in a manner
consistent with the requirements of this License, to extend the patent
license to downstream recipients.  ���Knowingly relying��� means you have
actual knowledge that, but for the patent license, your conveying the
covered work in a country, or your recipient's use of the covered work
in a country, would infringe one or more identifiable patents in that
country that you have reason to believe are valid.

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or convey a specific copy of the covered work, then the patent license
you grant is automatically extended to all recipients of the covered
work and works based on it.

A patent license is ���discriminatory��� if it does not include within the
scope of its coverage, prohibits the exercise of, or is conditioned on
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are a party to an arrangement with a third party that is in the
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license was granted, prior to 28 March 2007.

Nothing in this License shall be construed as excluding or limiting
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<LI>No Surrender of Others' Freedom.

If conditions are imposed on you (whether by court order, agreement or
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a covered work so as to satisfy simultaneously your obligations under
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consequence you may not convey it at all.  For example, if you agree
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from those to whom you convey the Program, the only way you could
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<LI>Use with the GNU Affero General Public License.

Notwithstanding any other provision of this License, you have
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section 13, concerning interaction through a network will apply to the
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<LI>Revised Versions of this License.

The Free Software Foundation may publish revised and/or new versions
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differ in detail to address new problems or concerns.

Each version is given a distinguishing version number.  If the Program
specifies that a certain numbered version of the GNU General Public
License ���or any later version��� applies to it, you have the option of
following the terms and conditions either of that numbered version or
of any later version published by the Free Software Foundation.  If
the Program does not specify a version number of the GNU General
Public License, you may choose any version ever published by the Free
Software Foundation.

If the Program specifies that a proxy can decide which future versions
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Later license versions may give you additional or different
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<LI>Disclaimer of Warranty.

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.

<LI>Limitation of Liability.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
CONVEYS 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.

<LI>Interpretation of Sections 15 and 16.

If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.

</OL>


<H2>1.2  END OF TERMS AND CONDITIONS</H2>


<H2>1.3  How to Apply These Terms to Your New Programs</H2>

<P>
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.

</P>
<P>
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
state the exclusion of warranty; and each file should have at least
the ���copyright��� line and a pointer to where the full notice is found.

</P>

<PRE>
<VAR>one line to give the program's name and a brief idea of what it does.</VAR>
Copyright (C) <VAR>year</VAR> <VAR>name of author</VAR>

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 3 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, see <A HREF="http://www.gnu.org/licenses/">http://www.gnu.org/licenses/</A>.
</PRE>

<P>
Also add information on how to contact you by electronic and paper mail.

</P>
<P>
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:

</P>

<PRE>
<VAR>program</VAR> Copyright (C) <VAR>year</VAR> <VAR>name of author</VAR>
This program comes with ABSOLUTELY NO WARRANTY; for details type <SAMP>&lsquo;show w&rsquo;</SAMP>.
This is free software, and you are welcome to redistribute it
under certain conditions; type <SAMP>&lsquo;show c&rsquo;</SAMP> for details.
</PRE>

<P>
The hypothetical commands <SAMP>&lsquo;show w&rsquo;</SAMP> and <SAMP>&lsquo;show c&rsquo;</SAMP> should show
the appropriate parts of the General Public License.  Of course, your
program's commands might be different; for a GUI interface, you would
use an ���about box���.

</P>
<P>
You should also get your employer (if you work as a programmer) or school,
if any, to sign a ���copyright disclaimer��� for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<A HREF="http://www.gnu.org/licenses/">http://www.gnu.org/licenses/</A>.

</P>
<P>
The GNU 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 Lesser General Public License instead of this License.  But
first, please read <A HREF="http://www.gnu.org/philosophy/why-not-lgpl.html">http://www.gnu.org/philosophy/why-not-lgpl.html</A>.

</P>
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