File: COPYING

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    This package is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License version 2 as
    published by the Free Software Foundation.

    This package 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 package (see below); if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA

DFCGen (GTK+) is:

    Copyright (C) 2006, 2011-2012 Ralf Hoppe <ralf.hoppe@ieee.org>


       GNU GENERAL PUBLIC LICENSE

       Version 2, June 1991

               Copyright (c) 1989, 1991 Free Software Foundation, Inc.
               59 Temple Place - Suite 330, Boston, MA 02111-1307, 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
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         Finally, any free program is threatened constantly by software
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       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

       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 Pro-
           gram 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.  (Here-
           inafter, 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 copy-
           right 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 per-
           missions 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 deriva-
           tive 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 fol-
           lowing:

           a.  Accompany it with the complete corresponding machine-readable source code, which must be dis-
               tributed 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 installa-
           tion 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 compo-
           nents (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 distri-
           bution 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 compliance.

       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 automati-
           cally 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' exer-
           cise 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 distribu-
           tion is permitted only in or among countries not thus excluded.  In such case, this License incorpo-
           rates 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 dif-
           fer 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 condi-
           tions 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
           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 CORREC-
           TION.

       12. 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

       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) <year>  <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., 59 Temple Place - Suite 330,
               Boston, MA 02111-1307, 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) <year> <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 ``copy-
       right 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.