c96017
                  GNU LESSER GENERAL PUBLIC LICENSE
c96017
                       Version 2.1, February 1999
c96017
c96017
 Copyright (C) 1991, 1999 Free Software Foundation, Inc.
c96017
 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
c96017
 Everyone is permitted to copy and distribute verbatim copies
c96017
 of this license document, but changing it is not allowed.
c96017
c96017
[This is the first released version of the Lesser GPL.  It also counts
c96017
 as the successor of the GNU Library Public License, version 2, hence
c96017
 the version number 2.1.]
c96017
c96017
                            Preamble
c96017
c96017
  The licenses for most software are designed to take away your
c96017
freedom to share and change it.  By contrast, the GNU General Public
c96017
Licenses are intended to guarantee your freedom to share and change
c96017
free software--to make sure the software is free for all its users.
c96017
c96017
  This license, the Lesser General Public License, applies to some
c96017
specially designated software packages--typically libraries--of the
c96017
Free Software Foundation and other authors who decide to use it.  You
c96017
can use it too, but we suggest you first think carefully about whether
c96017
this license or the ordinary General Public License is the better
c96017
strategy to use in any particular case, based on the explanations below.
c96017
c96017
  When we speak of free software, we are referring to freedom of use,
c96017
not price.  Our General Public Licenses are designed to make sure that
c96017
you have the freedom to distribute copies of free software (and charge
c96017
for this service if you wish); that you receive source code or can get
c96017
it if you want it; that you can change the software and use pieces of
c96017
it in new free programs; and that you are informed that you can do
c96017
these things.
c96017
c96017
  To protect your rights, we need to make restrictions that forbid
c96017
distributors to deny you these rights or to ask you to surrender these
c96017
rights.  These restrictions translate to certain responsibilities for
c96017
you if you distribute copies of the library or if you modify it.
c96017
c96017
  For example, if you distribute copies of the library, whether gratis
c96017
or for a fee, you must give the recipients all the rights that we gave
c96017
you.  You must make sure that they, too, receive or can get the source
c96017
code.  If you link other code with the library, you must provide
c96017
complete object files to the recipients, so that they can relink them
c96017
with the library after making changes to the library and recompiling
c96017
it.  And you must show them these terms so they know their rights.
c96017
c96017
  We protect your rights with a two-step method: (1) we copyright the
c96017
library, and (2) we offer you this license, which gives you legal
c96017
permission to copy, distribute and/or modify the library.
c96017
c96017
  To protect each distributor, we want to make it very clear that
c96017
there is no warranty for the free library.  Also, if the library is
c96017
modified by someone else and passed on, the recipients should know
c96017
that what they have is not the original version, so that the original
c96017
author's reputation will not be affected by problems that might be
c96017
introduced by others.
c96017

c96017
  Finally, software patents pose a constant threat to the existence of
c96017
any free program.  We wish to make sure that a company cannot
c96017
effectively restrict the users of a free program by obtaining a
c96017
restrictive license from a patent holder.  Therefore, we insist that
c96017
any patent license obtained for a version of the library must be
c96017
consistent with the full freedom of use specified in this license.
c96017
c96017
  Most GNU software, including some libraries, is covered by the
c96017
ordinary GNU General Public License.  This license, the GNU Lesser
c96017
General Public License, applies to certain designated libraries, and
c96017
is quite different from the ordinary General Public License.  We use
c96017
this license for certain libraries in order to permit linking those
c96017
libraries into non-free programs.
c96017
c96017
  When a program is linked with a library, whether statically or using
c96017
a shared library, the combination of the two is legally speaking a
c96017
combined work, a derivative of the original library.  The ordinary
c96017
General Public License therefore permits such linking only if the
c96017
entire combination fits its criteria of freedom.  The Lesser General
c96017
Public License permits more lax criteria for linking other code with
c96017
the library.
c96017
c96017
  We call this license the "Lesser" General Public License because it
c96017
does Less to protect the user's freedom than the ordinary General
c96017
Public License.  It also provides other free software developers Less
c96017
of an advantage over competing non-free programs.  These disadvantages
c96017
are the reason we use the ordinary General Public License for many
c96017
libraries.  However, the Lesser license provides advantages in certain
c96017
special circumstances.
c96017
c96017
  For example, on rare occasions, there may be a special need to
c96017
encourage the widest possible use of a certain library, so that it becomes
c96017
a de-facto standard.  To achieve this, non-free programs must be
c96017
allowed to use the library.  A more frequent case is that a free
c96017
library does the same job as widely used non-free libraries.  In this
c96017
case, there is little to gain by limiting the free library to free
c96017
software only, so we use the Lesser General Public License.
c96017
c96017
  In other cases, permission to use a particular library in non-free
c96017
programs enables a greater number of people to use a large body of
c96017
free software.  For example, permission to use the GNU C Library in
c96017
non-free programs enables many more people to use the whole GNU
c96017
operating system, as well as its variant, the GNU/Linux operating
c96017
system.
c96017
c96017
  Although the Lesser General Public License is Less protective of the
c96017
users' freedom, it does ensure that the user of a program that is
c96017
linked with the Library has the freedom and the wherewithal to run
c96017
that program using a modified version of the Library.
c96017
c96017
  The precise terms and conditions for copying, distribution and
c96017
modification follow.  Pay close attention to the difference between a
c96017
"work based on the library" and a "work that uses the library".  The
c96017
former contains code derived from the library, whereas the latter must
c96017
be combined with the library in order to run.
c96017

c96017
                  GNU LESSER GENERAL PUBLIC LICENSE
c96017
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
c96017
c96017
  0. This License Agreement applies to any software library or other
c96017
program which contains a notice placed by the copyright holder or
c96017
other authorized party saying it may be distributed under the terms of
c96017
this Lesser General Public License (also called "this License").
c96017
Each licensee is addressed as "you".
c96017
c96017
  A "library" means a collection of software functions and/or data
c96017
prepared so as to be conveniently linked with application programs
c96017
(which use some of those functions and data) to form executables.
c96017
c96017
  The "Library", below, refers to any such software library or work
c96017
which has been distributed under these terms.  A "work based on the
c96017
Library" means either the Library or any derivative work under
c96017
copyright law: that is to say, a work containing the Library or a
c96017
portion of it, either verbatim or with modifications and/or translated
c96017
straightforwardly into another language.  (Hereinafter, translation is
c96017
included without limitation in the term "modification".)
c96017
c96017
  "Source code" for a work means the preferred form of the work for
c96017
making modifications to it.  For a library, complete source code means
c96017
all the source code for all modules it contains, plus any associated
c96017
interface definition files, plus the scripts used to control compilation
c96017
and installation of the library.
c96017
c96017
  Activities other than copying, distribution and modification are not
c96017
covered by this License; they are outside its scope.  The act of
c96017
running a program using the Library is not restricted, and output from
c96017
such a program is covered only if its contents constitute a work based
c96017
on the Library (independent of the use of the Library in a tool for
c96017
writing it).  Whether that is true depends on what the Library does
c96017
and what the program that uses the Library does.
c96017
c96017
  1. You may copy and distribute verbatim copies of the Library's
c96017
complete source code as you receive it, in any medium, provided that
c96017
you conspicuously and appropriately publish on each copy an
c96017
appropriate copyright notice and disclaimer of warranty; keep intact
c96017
all the notices that refer to this License and to the absence of any
c96017
warranty; and distribute a copy of this License along with the
c96017
Library.
c96017
c96017
  You may charge a fee for the physical act of transferring a copy,
c96017
and you may at your option offer warranty protection in exchange for a
c96017
fee.
c96017

c96017
  2. You may modify your copy or copies of the Library or any portion
c96017
of it, thus forming a work based on the Library, and copy and
c96017
distribute such modifications or work under the terms of Section 1
c96017
above, provided that you also meet all of these conditions:
c96017
c96017
    a) The modified work must itself be a software library.
c96017
c96017
    b) You must cause the files modified to carry prominent notices
c96017
    stating that you changed the files and the date of any change.
c96017
c96017
    c) You must cause the whole of the work to be licensed at no
c96017
    charge to all third parties under the terms of this License.
c96017
c96017
    d) If a facility in the modified Library refers to a function or a
c96017
    table of data to be supplied by an application program that uses
c96017
    the facility, other than as an argument passed when the facility
c96017
    is invoked, then you must make a good faith effort to ensure that,
c96017
    in the event an application does not supply such function or
c96017
    table, the facility still operates, and performs whatever part of
c96017
    its purpose remains meaningful.
c96017
c96017
    (For example, a function in a library to compute square roots has
c96017
    a purpose that is entirely well-defined independent of the
c96017
    application.  Therefore, Subsection 2d requires that any
c96017
    application-supplied function or table used by this function must
c96017
    be optional: if the application does not supply it, the square
c96017
    root function must still compute square roots.)
c96017
c96017
These requirements apply to the modified work as a whole.  If
c96017
identifiable sections of that work are not derived from the Library,
c96017
and can be reasonably considered independent and separate works in
c96017
themselves, then this License, and its terms, do not apply to those
c96017
sections when you distribute them as separate works.  But when you
c96017
distribute the same sections as part of a whole which is a work based
c96017
on the Library, the distribution of the whole must be on the terms of
c96017
this License, whose permissions for other licensees extend to the
c96017
entire whole, and thus to each and every part regardless of who wrote
c96017
it.
c96017
c96017
Thus, it is not the intent of this section to claim rights or contest
c96017
your rights to work written entirely by you; rather, the intent is to
c96017
exercise the right to control the distribution of derivative or
c96017
collective works based on the Library.
c96017
c96017
In addition, mere aggregation of another work not based on the Library
c96017
with the Library (or with a work based on the Library) on a volume of
c96017
a storage or distribution medium does not bring the other work under
c96017
the scope of this License.
c96017
c96017
  3. You may opt to apply the terms of the ordinary GNU General Public
c96017
License instead of this License to a given copy of the Library.  To do
c96017
this, you must alter all the notices that refer to this License, so
c96017
that they refer to the ordinary GNU General Public License, version 2,
c96017
instead of to this License.  (If a newer version than version 2 of the
c96017
ordinary GNU General Public License has appeared, then you can specify
c96017
that version instead if you wish.)  Do not make any other change in
c96017
these notices.
c96017

c96017
  Once this change is made in a given copy, it is irreversible for
c96017
that copy, so the ordinary GNU General Public License applies to all
c96017
subsequent copies and derivative works made from that copy.
c96017
c96017
  This option is useful when you wish to copy part of the code of
c96017
the Library into a program that is not a library.
c96017
c96017
  4. You may copy and distribute the Library (or a portion or
c96017
derivative of it, under Section 2) in object code or executable form
c96017
under the terms of Sections 1 and 2 above provided that you accompany
c96017
it with the complete corresponding machine-readable source code, which
c96017
must be distributed under the terms of Sections 1 and 2 above on a
c96017
medium customarily used for software interchange.
c96017
c96017
  If distribution of object code is made by offering access to copy
c96017
from a designated place, then offering equivalent access to copy the
c96017
source code from the same place satisfies the requirement to
c96017
distribute the source code, even though third parties are not
c96017
compelled to copy the source along with the object code.
c96017
c96017
  5. A program that contains no derivative of any portion of the
c96017
Library, but is designed to work with the Library by being compiled or
c96017
linked with it, is called a "work that uses the Library".  Such a
c96017
work, in isolation, is not a derivative work of the Library, and
c96017
therefore falls outside the scope of this License.
c96017
c96017
  However, linking a "work that uses the Library" with the Library
c96017
creates an executable that is a derivative of the Library (because it
c96017
contains portions of the Library), rather than a "work that uses the
c96017
library".  The executable is therefore covered by this License.
c96017
Section 6 states terms for distribution of such executables.
c96017
c96017
  When a "work that uses the Library" uses material from a header file
c96017
that is part of the Library, the object code for the work may be a
c96017
derivative work of the Library even though the source code is not.
c96017
Whether this is true is especially significant if the work can be
c96017
linked without the Library, or if the work is itself a library.  The
c96017
threshold for this to be true is not precisely defined by law.
c96017
c96017
  If such an object file uses only numerical parameters, data
c96017
structure layouts and accessors, and small macros and small inline
c96017
functions (ten lines or less in length), then the use of the object
c96017
file is unrestricted, regardless of whether it is legally a derivative
c96017
work.  (Executables containing this object code plus portions of the
c96017
Library will still fall under Section 6.)
c96017
c96017
  Otherwise, if the work is a derivative of the Library, you may
c96017
distribute the object code for the work under the terms of Section 6.
c96017
Any executables containing that work also fall under Section 6,
c96017
whether or not they are linked directly with the Library itself.
c96017

c96017
  6. As an exception to the Sections above, you may also combine or
c96017
link a "work that uses the Library" with the Library to produce a
c96017
work containing portions of the Library, and distribute that work
c96017
under terms of your choice, provided that the terms permit
c96017
modification of the work for the customer's own use and reverse
c96017
engineering for debugging such modifications.
c96017
c96017
  You must give prominent notice with each copy of the work that the
c96017
Library is used in it and that the Library and its use are covered by
c96017
this License.  You must supply a copy of this License.  If the work
c96017
during execution displays copyright notices, you must include the
c96017
copyright notice for the Library among them, as well as a reference
c96017
directing the user to the copy of this License.  Also, you must do one
c96017
of these things:
c96017
c96017
    a) Accompany the work with the complete corresponding
c96017
    machine-readable source code for the Library including whatever
c96017
    changes were used in the work (which must be distributed under
c96017
    Sections 1 and 2 above); and, if the work is an executable linked
c96017
    with the Library, with the complete machine-readable "work that
c96017
    uses the Library", as object code and/or source code, so that the
c96017
    user can modify the Library and then relink to produce a modified
c96017
    executable containing the modified Library.  (It is understood
c96017
    that the user who changes the contents of definitions files in the
c96017
    Library will not necessarily be able to recompile the application
c96017
    to use the modified definitions.)
c96017
c96017
    b) Use a suitable shared library mechanism for linking with the
c96017
    Library.  A suitable mechanism is one that (1) uses at run time a
c96017
    copy of the library already present on the user's computer system,
c96017
    rather than copying library functions into the executable, and (2)
c96017
    will operate properly with a modified version of the library, if
c96017
    the user installs one, as long as the modified version is
c96017
    interface-compatible with the version that the work was made with.
c96017
c96017
    c) Accompany the work with a written offer, valid for at
c96017
    least three years, to give the same user the materials
c96017
    specified in Subsection 6a, above, for a charge no more
c96017
    than the cost of performing this distribution.
c96017
c96017
    d) If distribution of the work is made by offering access to copy
c96017
    from a designated place, offer equivalent access to copy the above
c96017
    specified materials from the same place.
c96017
c96017
    e) Verify that the user has already received a copy of these
c96017
    materials or that you have already sent this user a copy.
c96017
c96017
  For an executable, the required form of the "work that uses the
c96017
Library" must include any data and utility programs needed for
c96017
reproducing the executable from it.  However, as a special exception,
c96017
the materials to be distributed need not include anything that is
c96017
normally distributed (in either source or binary form) with the major
c96017
components (compiler, kernel, and so on) of the operating system on
c96017
which the executable runs, unless that component itself accompanies
c96017
the executable.
c96017
c96017
  It may happen that this requirement contradicts the license
c96017
restrictions of other proprietary libraries that do not normally
c96017
accompany the operating system.  Such a contradiction means you cannot
c96017
use both them and the Library together in an executable that you
c96017
distribute.
c96017

c96017
  7. You may place library facilities that are a work based on the
c96017
Library side-by-side in a single library together with other library
c96017
facilities not covered by this License, and distribute such a combined
c96017
library, provided that the separate distribution of the work based on
c96017
the Library and of the other library facilities is otherwise
c96017
permitted, and provided that you do these two things:
c96017
c96017
    a) Accompany the combined library with a copy of the same work
c96017
    based on the Library, uncombined with any other library
c96017
    facilities.  This must be distributed under the terms of the
c96017
    Sections above.
c96017
c96017
    b) Give prominent notice with the combined library of the fact
c96017
    that part of it is a work based on the Library, and explaining
c96017
    where to find the accompanying uncombined form of the same work.
c96017
c96017
  8. You may not copy, modify, sublicense, link with, or distribute
c96017
the Library except as expressly provided under this License.  Any
c96017
attempt otherwise to copy, modify, sublicense, link with, or
c96017
distribute the Library is void, and will automatically terminate your
c96017
rights under this License.  However, parties who have received copies,
c96017
or rights, from you under this License will not have their licenses
c96017
terminated so long as such parties remain in full compliance.
c96017
c96017
  9. You are not required to accept this License, since you have not
c96017
signed it.  However, nothing else grants you permission to modify or
c96017
distribute the Library or its derivative works.  These actions are
c96017
prohibited by law if you do not accept this License.  Therefore, by
c96017
modifying or distributing the Library (or any work based on the
c96017
Library), you indicate your acceptance of this License to do so, and
c96017
all its terms and conditions for copying, distributing or modifying
c96017
the Library or works based on it.
c96017
c96017
  10. Each time you redistribute the Library (or any work based on the
c96017
Library), the recipient automatically receives a license from the
c96017
original licensor to copy, distribute, link with or modify the Library
c96017
subject to these terms and conditions.  You may not impose any further
c96017
restrictions on the recipients' exercise of the rights granted herein.
c96017
You are not responsible for enforcing compliance by third parties with
c96017
this License.
c96017

c96017
  11. If, as a consequence of a court judgment or allegation of patent
c96017
infringement or for any other reason (not limited to patent issues),
c96017
conditions are imposed on you (whether by court order, agreement or
c96017
otherwise) that contradict the conditions of this License, they do not
c96017
excuse you from the conditions of this License.  If you cannot
c96017
distribute so as to satisfy simultaneously your obligations under this
c96017
License and any other pertinent obligations, then as a consequence you
c96017
may not distribute the Library at all.  For example, if a patent
c96017
license would not permit royalty-free redistribution of the Library by
c96017
all those who receive copies directly or indirectly through you, then
c96017
the only way you could satisfy both it and this License would be to
c96017
refrain entirely from distribution of the Library.
c96017
c96017
If any portion of this section is held invalid or unenforceable under any
c96017
particular circumstance, the balance of the section is intended to apply,
c96017
and the section as a whole is intended to apply in other circumstances.
c96017
c96017
It is not the purpose of this section to induce you to infringe any
c96017
patents or other property right claims or to contest validity of any
c96017
such claims; this section has the sole purpose of protecting the
c96017
integrity of the free software distribution system which is
c96017
implemented by public license practices.  Many people have made
c96017
generous contributions to the wide range of software distributed
c96017
through that system in reliance on consistent application of that
c96017
system; it is up to the author/donor to decide if he or she is willing
c96017
to distribute software through any other system and a licensee cannot
c96017
impose that choice.
c96017
c96017
This section is intended to make thoroughly clear what is believed to
c96017
be a consequence of the rest of this License.
c96017
c96017
  12. If the distribution and/or use of the Library is restricted in
c96017
certain countries either by patents or by copyrighted interfaces, the
c96017
original copyright holder who places the Library under this License may add
c96017
an explicit geographical distribution limitation excluding those countries,
c96017
so that distribution is permitted only in or among countries not thus
c96017
excluded.  In such case, this License incorporates the limitation as if
c96017
written in the body of this License.
c96017
c96017
  13. The Free Software Foundation may publish revised and/or new
c96017
versions of the Lesser General Public License from time to time.
c96017
Such new versions will be similar in spirit to the present version,
c96017
but may differ in detail to address new problems or concerns.
c96017
c96017
Each version is given a distinguishing version number.  If the Library
c96017
specifies a version number of this License which applies to it and
c96017
"any later version", you have the option of following the terms and
c96017
conditions either of that version or of any later version published by
c96017
the Free Software Foundation.  If the Library does not specify a
c96017
license version number, you may choose any version ever published by
c96017
the Free Software Foundation.
c96017

c96017
  14. If you wish to incorporate parts of the Library into other free
c96017
programs whose distribution conditions are incompatible with these,
c96017
write to the author to ask for permission.  For software which is
c96017
copyrighted by the Free Software Foundation, write to the Free
c96017
Software Foundation; we sometimes make exceptions for this.  Our
c96017
decision will be guided by the two goals of preserving the free status
c96017
of all derivatives of our free software and of promoting the sharing
c96017
and reuse of software generally.
c96017
c96017
                            NO WARRANTY
c96017
c96017
  15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
c96017
WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
c96017
EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
c96017
OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
c96017
KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
c96017
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
c96017
PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
c96017
LIBRARY IS WITH YOU.  SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
c96017
THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
c96017
c96017
  16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
c96017
WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
c96017
AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
c96017
FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
c96017
CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
c96017
LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
c96017
RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
c96017
FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
c96017
SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
c96017
DAMAGES.
c96017
c96017
                     END OF TERMS AND CONDITIONS
c96017

c96017
           How to Apply These Terms to Your New Libraries
c96017
c96017
  If you develop a new library, and you want it to be of the greatest
c96017
possible use to the public, we recommend making it free software that
c96017
everyone can redistribute and change.  You can do so by permitting
c96017
redistribution under these terms (or, alternatively, under the terms of the
c96017
ordinary General Public License).
c96017
c96017
  To apply these terms, attach the following notices to the library.  It is
c96017
safest to attach them to the start of each source file to most effectively
c96017
convey the exclusion of warranty; and each file should have at least the
c96017
"copyright" line and a pointer to where the full notice is found.
c96017
c96017
    <one line to give the library's name and a brief idea of what it does.>
c96017
    Copyright (C) <year>  <name of author>
c96017
c96017
    This library is free software; you can redistribute it and/or
c96017
    modify it under the terms of the GNU Lesser General Public
c96017
    License as published by the Free Software Foundation; either
c96017
    version 2.1 of the License, or (at your option) any later version.
c96017
c96017
    This library is distributed in the hope that it will be useful,
c96017
    but WITHOUT ANY WARRANTY; without even the implied warranty of
c96017
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
c96017
    Lesser General Public License for more details.
c96017
c96017
    You should have received a copy of the GNU Lesser General Public
c96017
    License along with this library; if not, write to the Free Software
c96017
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
c96017
c96017
Also add information on how to contact you by electronic and paper mail.
c96017
c96017
You should also get your employer (if you work as a programmer) or your
c96017
school, if any, to sign a "copyright disclaimer" for the library, if
c96017
necessary.  Here is a sample; alter the names:
c96017
c96017
  Yoyodyne, Inc., hereby disclaims all copyright interest in the
c96017
  library `Frob' (a library for tweaking knobs) written by James Random Hacker.
c96017
c96017
  <signature of Ty Coon>, 1 April 1990
c96017
  Ty Coon, President of Vice
c96017
c96017
That's all there is to it!