| The GNU General Public License (GPL) | |
| 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 Library General Public License instead.) You can apply it to | |
| your programs, too. | |
| When we speak of free software, we are referring to freedom, not price. Our | |
| General Public Licenses are designed to make sure that you have the freedom to | |
| distribute copies of free software (and charge for this service if you wish), | |
| that you receive source code or can get it if you want it, that you can change | |
| the software or use pieces of it in new free programs; and that you know you | |
| can do these things. | |
| To protect your rights, we need to make restrictions that forbid anyone to deny | |
| you these rights or to ask you to surrender the rights. These restrictions | |
| translate to certain responsibilities for you if you distribute copies of the | |
| software, or if you modify it. | |
| For example, if you distribute copies of such a program, whether gratis or for | |
| a fee, you must give the recipients all the rights that you have. You must | |
| make sure that they, too, receive or can get the source code. And you must | |
| show them these terms so they know their rights. | |
| We protect your rights with two steps: (1) copyright the software, and (2) | |
| offer you this license which gives you legal permission to copy, distribute | |
| and/or modify the software. | |
| Also, for each author's protection and ours, we want to make certain that | |
| everyone understands that there is no warranty for this free software. If the | |
| software is modified by someone else and passed on, we want its recipients to | |
| know that what they have is not the original, so that any problems introduced | |
| by others will not reflect on the original authors' reputations. | |
| Finally, any free program is threatened constantly by software patents. We | |
| wish to avoid the danger that redistributors of a free program will | |
| individually obtain patent licenses, in effect making the program proprietary. | |
| To prevent this, we have made it clear that any patent must be licensed for | |
| everyone's free use or not licensed at all. | |
| The precise terms and conditions for copying, distribution and modification | |
| follow. | |
| TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION | |
| 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 offering equivalent access to copy the source | |
| code from the same place counts as distribution of the source code, even though | |
| third parties are not compelled to copy the source along with the object code. | |
| 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 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 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. | |
| 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., | |
| 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 "copyright disclaimer" for the program, if necessary. Here | |
| is a sample; alter the names: | |
| Yoyodyne, Inc., hereby disclaims all copyright interest in the program | |
| 'Gnomovision' (which makes passes at compilers) written by James Hacker. | |
| signature of Ty Coon, 1 April 1989 | |
| Ty Coon, President of Vice | |
| This General Public License does not permit incorporating your program into | |
| proprietary programs. If your program is a subroutine library, you may | |
| consider it more useful to permit linking proprietary applications with the | |
| library. If this is what you want to do, use the GNU Library General Public | |
| License instead of this License. | |
| "CLASSPATH" EXCEPTION TO THE GPL | |
| Certain source files distributed by Oracle America and/or its affiliates are | |
| subject to the following clarification and special exception to the GPL, but | |
| only where Oracle has expressly included in the particular source file's header | |
| the words "Oracle designates this particular file as subject to the "Classpath" | |
| exception as provided by Oracle in the LICENSE file that accompanied this code." | |
| Linking this library statically or dynamically with other modules is making | |
| a combined work based on this library. Thus, the terms and conditions of | |
| the GNU General Public License cover the whole combination. | |
| As a special exception, the copyright holders of this library give you | |
| permission to link this library with independent modules to produce an | |
| executable, regardless of the license terms of these independent modules, | |
| and to copy and distribute the resulting executable under terms of your | |
| choice, provided that you also meet, for each linked independent module, | |
| the terms and conditions of the license of that module. An independent | |
| module is a module which is not derived from or based on this library. If | |
| you modify this library, you may extend this exception to your version of | |
| the library, but you are not obligated to do so. If you do not wish to do | |
| so, delete this exception statement from your version. |