1Copyright (c) 2011, Patrick Hayes and contributors 2 3This program is dual-licensed under both the GPL version 2 (or later) and 4Modified BSD License. Either license may be used at your option. 5 6------------------------------------------------------------------------------ 7Modified BSD License 8 9Redistribution and use in source and binary forms, with or without 10modification, are permitted provided that the following conditions are met: 11 * Redistributions of source code must retain the above copyright 12 notice, this list of conditions and the following disclaimer. 13 * Redistributions in binary form must reproduce the above copyright 14 notice, this list of conditions and the following disclaimer in the 15 documentation and/or other materials provided with the distribution. 16 * Neither the name of the copyright holder nor the 17 names of the contributors may be used to endorse or promote products 18 derived from this software without specific prior written permission. 19 20THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 21ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 22WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 23DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY 24DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 25(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 26LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 27ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 29SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31------------------------------------------------------------------------------- 32 GNU GENERAL PUBLIC LICENSE 33 Version 2, June 1991 34 35 Copyright (C) 1989, 1991 Free Software Foundation, Inc., 36 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 37 Everyone is permitted to copy and distribute verbatim copies 38 of this license document, but changing it is not allowed. 39 40 Preamble 41 42 The licenses for most software are designed to take away your 43freedom to share and change it. By contrast, the GNU General Public 44License is intended to guarantee your freedom to share and change free 45software--to make sure the software is free for all its users. This 46General Public License applies to most of the Free Software 47Foundation's software and to any other program whose authors commit to 48using it. (Some other Free Software Foundation software is covered by 49the GNU Lesser General Public License instead.) You can apply it to 50your programs, too. 51 52 When we speak of free software, we are referring to freedom, not 53price. Our General Public Licenses are designed to make sure that you 54have the freedom to distribute copies of free software (and charge for 55this service if you wish), that you receive source code or can get it 56if you want it, that you can change the software or use pieces of it 57in new free programs; and that you know you can do these things. 58 59 To protect your rights, we need to make restrictions that forbid 60anyone to deny you these rights or to ask you to surrender the rights. 61These restrictions translate to certain responsibilities for you if you 62distribute copies of the software, or if you modify it. 63 64 For example, if you distribute copies of such a program, whether 65gratis or for a fee, you must give the recipients all the rights that 66you have. You must make sure that they, too, receive or can get the 67source code. And you must show them these terms so they know their 68rights. 69 70 We protect your rights with two steps: (1) copyright the software, and 71(2) offer you this license which gives you legal permission to copy, 72distribute and/or modify the software. 73 74 Also, for each author's protection and ours, we want to make certain 75that everyone understands that there is no warranty for this free 76software. If the software is modified by someone else and passed on, we 77want its recipients to know that what they have is not the original, so 78that any problems introduced by others will not reflect on the original 79authors' reputations. 80 81 Finally, any free program is threatened constantly by software 82patents. We wish to avoid the danger that redistributors of a free 83program will individually obtain patent licenses, in effect making the 84program proprietary. To prevent this, we have made it clear that any 85patent must be licensed for everyone's free use or not licensed at all. 86 87 The precise terms and conditions for copying, distribution and 88modification follow. 89 90 GNU GENERAL PUBLIC LICENSE 91 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 92 93 0. This License applies to any program or other work which contains 94a notice placed by the copyright holder saying it may be distributed 95under the terms of this General Public License. The "Program", below, 96refers to any such program or work, and a "work based on the Program" 97means either the Program or any derivative work under copyright law: 98that is to say, a work containing the Program or a portion of it, 99either verbatim or with modifications and/or translated into another 100language. (Hereinafter, translation is included without limitation in 101the term "modification".) Each licensee is addressed as "you". 102 103Activities other than copying, distribution and modification are not 104covered by this License; they are outside its scope. The act of 105running the Program is not restricted, and the output from the Program 106is covered only if its contents constitute a work based on the 107Program (independent of having been made by running the Program). 108Whether that is true depends on what the Program does. 109 110 1. You may copy and distribute verbatim copies of the Program's 111source code as you receive it, in any medium, provided that you 112conspicuously and appropriately publish on each copy an appropriate 113copyright notice and disclaimer of warranty; keep intact all the 114notices that refer to this License and to the absence of any warranty; 115and give any other recipients of the Program a copy of this License 116along with the Program. 117 118You may charge a fee for the physical act of transferring a copy, and 119you may at your option offer warranty protection in exchange for a fee. 120 121 2. You may modify your copy or copies of the Program or any portion 122of it, thus forming a work based on the Program, and copy and 123distribute such modifications or work under the terms of Section 1 124above, provided that you also meet all of these conditions: 125 126 a) You must cause the modified files to carry prominent notices 127 stating that you changed the files and the date of any change. 128 129 b) You must cause any work that you distribute or publish, that in 130 whole or in part contains or is derived from the Program or any 131 part thereof, to be licensed as a whole at no charge to all third 132 parties under the terms of this License. 133 134 c) If the modified program normally reads commands interactively 135 when run, you must cause it, when started running for such 136 interactive use in the most ordinary way, to print or display an 137 announcement including an appropriate copyright notice and a 138 notice that there is no warranty (or else, saying that you provide 139 a warranty) and that users may redistribute the program under 140 these conditions, and telling the user how to view a copy of this 141 License. (Exception: if the Program itself is interactive but 142 does not normally print such an announcement, your work based on 143 the Program is not required to print an announcement.) 144 145These requirements apply to the modified work as a whole. If 146identifiable sections of that work are not derived from the Program, 147and can be reasonably considered independent and separate works in 148themselves, then this License, and its terms, do not apply to those 149sections when you distribute them as separate works. But when you 150distribute the same sections as part of a whole which is a work based 151on the Program, the distribution of the whole must be on the terms of 152this License, whose permissions for other licensees extend to the 153entire whole, and thus to each and every part regardless of who wrote it. 154 155Thus, it is not the intent of this section to claim rights or contest 156your rights to work written entirely by you; rather, the intent is to 157exercise the right to control the distribution of derivative or 158collective works based on the Program. 159 160In addition, mere aggregation of another work not based on the Program 161with the Program (or with a work based on the Program) on a volume of 162a storage or distribution medium does not bring the other work under 163the scope of this License. 164 165 3. You may copy and distribute the Program (or a work based on it, 166under Section 2) in object code or executable form under the terms of 167Sections 1 and 2 above provided that you also do one of the following: 168 169 a) Accompany it with the complete corresponding machine-readable 170 source code, which must be distributed under the terms of Sections 171 1 and 2 above on a medium customarily used for software interchange; or, 172 173 b) Accompany it with a written offer, valid for at least three 174 years, to give any third party, for a charge no more than your 175 cost of physically performing source distribution, a complete 176 machine-readable copy of the corresponding source code, to be 177 distributed under the terms of Sections 1 and 2 above on a medium 178 customarily used for software interchange; or, 179 180 c) Accompany it with the information you received as to the offer 181 to distribute corresponding source code. (This alternative is 182 allowed only for noncommercial distribution and only if you 183 received the program in object code or executable form with such 184 an offer, in accord with Subsection b above.) 185 186The source code for a work means the preferred form of the work for 187making modifications to it. For an executable work, complete source 188code means all the source code for all modules it contains, plus any 189associated interface definition files, plus the scripts used to 190control compilation and installation of the executable. However, as a 191special exception, the source code distributed need not include 192anything that is normally distributed (in either source or binary 193form) with the major components (compiler, kernel, and so on) of the 194operating system on which the executable runs, unless that component 195itself accompanies the executable. 196 197If distribution of executable or object code is made by offering 198access to copy from a designated place, then offering equivalent 199access to copy the source code from the same place counts as 200distribution of the source code, even though third parties are not 201compelled to copy the source along with the object code. 202 203 4. You may not copy, modify, sublicense, or distribute the Program 204except as expressly provided under this License. Any attempt 205otherwise to copy, modify, sublicense or distribute the Program is 206void, and will automatically terminate your rights under this License. 207However, parties who have received copies, or rights, from you under 208this License will not have their licenses terminated so long as such 209parties remain in full compliance. 210 211 5. You are not required to accept this License, since you have not 212signed it. However, nothing else grants you permission to modify or 213distribute the Program or its derivative works. These actions are 214prohibited by law if you do not accept this License. Therefore, by 215modifying or distributing the Program (or any work based on the 216Program), you indicate your acceptance of this License to do so, and 217all its terms and conditions for copying, distributing or modifying 218the Program or works based on it. 219 220 6. Each time you redistribute the Program (or any work based on the 221Program), the recipient automatically receives a license from the 222original licensor to copy, distribute or modify the Program subject to 223these terms and conditions. You may not impose any further 224restrictions on the recipients' exercise of the rights granted herein. 225You are not responsible for enforcing compliance by third parties to 226this License. 227 228 7. If, as a consequence of a court judgment or allegation of patent 229infringement or for any other reason (not limited to patent issues), 230conditions are imposed on you (whether by court order, agreement or 231otherwise) that contradict the conditions of this License, they do not 232excuse you from the conditions of this License. If you cannot 233distribute so as to satisfy simultaneously your obligations under this 234License and any other pertinent obligations, then as a consequence you 235may not distribute the Program at all. For example, if a patent 236license would not permit royalty-free redistribution of the Program by 237all those who receive copies directly or indirectly through you, then 238the only way you could satisfy both it and this License would be to 239refrain entirely from distribution of the Program. 240 241If any portion of this section is held invalid or unenforceable under 242any particular circumstance, the balance of the section is intended to 243apply and the section as a whole is intended to apply in other 244circumstances. 245 246It is not the purpose of this section to induce you to infringe any 247patents or other property right claims or to contest validity of any 248such claims; this section has the sole purpose of protecting the 249integrity of the free software distribution system, which is 250implemented by public license practices. Many people have made 251generous contributions to the wide range of software distributed 252through that system in reliance on consistent application of that 253system; it is up to the author/donor to decide if he or she is willing 254to distribute software through any other system and a licensee cannot 255impose that choice. 256 257This section is intended to make thoroughly clear what is believed to 258be a consequence of the rest of this License. 259 260 8. If the distribution and/or use of the Program is restricted in 261certain countries either by patents or by copyrighted interfaces, the 262original copyright holder who places the Program under this License 263may add an explicit geographical distribution limitation excluding 264those countries, so that distribution is permitted only in or among 265countries not thus excluded. In such case, this License incorporates 266the limitation as if written in the body of this License. 267 268 9. The Free Software Foundation may publish revised and/or new versions 269of the General Public License from time to time. Such new versions will 270be similar in spirit to the present version, but may differ in detail to 271address new problems or concerns. 272 273Each version is given a distinguishing version number. If the Program 274specifies a version number of this License which applies to it and "any 275later version", you have the option of following the terms and conditions 276either of that version or of any later version published by the Free 277Software Foundation. If the Program does not specify a version number of 278this License, you may choose any version ever published by the Free Software 279Foundation. 280 281 10. If you wish to incorporate parts of the Program into other free 282programs whose distribution conditions are different, write to the author 283to ask for permission. For software which is copyrighted by the Free 284Software Foundation, write to the Free Software Foundation; we sometimes 285make exceptions for this. Our decision will be guided by the two goals 286of preserving the free status of all derivatives of our free software and 287of promoting the sharing and reuse of software generally. 288 289 NO WARRANTY 290 291 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 292FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 293OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 294PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 295OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 296MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS 297TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 298PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 299REPAIR OR CORRECTION. 300 301 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 302WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 303REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 304INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 305OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 306TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 307YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 308PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 309POSSIBILITY OF SUCH DAMAGES. 310 311 END OF TERMS AND CONDITIONS 312 313 How to Apply These Terms to Your New Programs 314 315 If you develop a new program, and you want it to be of the greatest 316possible use to the public, the best way to achieve this is to make it 317free software which everyone can redistribute and change under these terms. 318 319 To do so, attach the following notices to the program. It is safest 320to attach them to the start of each source file to most effectively 321convey the exclusion of warranty; and each file should have at least 322the "copyright" line and a pointer to where the full notice is found. 323 324 <one line to give the program's name and a brief idea of what it does.> 325 Copyright (C) <year> <name of author> 326 327 This program is free software; you can redistribute it and/or modify 328 it under the terms of the GNU General Public License as published by 329 the Free Software Foundation; either version 2 of the License, or 330 (at your option) any later version. 331 332 This program is distributed in the hope that it will be useful, 333 but WITHOUT ANY WARRANTY; without even the implied warranty of 334 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 335 GNU General Public License for more details. 336 337 You should have received a copy of the GNU General Public License along 338 with this program; if not, write to the Free Software Foundation, Inc., 339 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 340 341Also add information on how to contact you by electronic and paper mail. 342 343If the program is interactive, make it output a short notice like this 344when it starts in an interactive mode: 345 346 Gnomovision version 69, Copyright (C) year name of author 347 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 348 This is free software, and you are welcome to redistribute it 349 under certain conditions; type `show c' for details. 350 351The hypothetical commands `show w' and `show c' should show the appropriate 352parts of the General Public License. Of course, the commands you use may 353be called something other than `show w' and `show c'; they could even be 354mouse-clicks or menu items--whatever suits your program. 355 356You should also get your employer (if you work as a programmer) or your 357school, if any, to sign a "copyright disclaimer" for the program, if 358necessary. Here is a sample; alter the names: 359 360 Yoyodyne, Inc., hereby disclaims all copyright interest in the program 361 `Gnomovision' (which makes passes at compilers) written by James Hacker. 362 363 <signature of Ty Coon>, 1 April 1989 364 Ty Coon, President of Vice 365 366This General Public License does not permit incorporating your program into 367proprietary programs. If your program is a subroutine library, you may 368consider it more useful to permit linking proprietary applications with the 369library. If this is what you want to do, use the GNU Lesser General 370Public License instead of this License. 371