COPYING 26 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502
  1. GNU LESSER GENERAL PUBLIC LICENSE
  2. Version 2.1, February 1999
  3. Copyright (C) 1991, 1999 Free Software Foundation, Inc.
  4. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  5. Everyone is permitted to copy and distribute verbatim copies
  6. of this license document, but changing it is not allowed.
  7. [This is the first released version of the Lesser GPL. It also counts
  8. as the successor of the GNU Library Public License, version 2, hence
  9. the version number 2.1.]
  10. Preamble
  11. The licenses for most software are designed to take away your
  12. freedom to share and change it. By contrast, the GNU General Public
  13. Licenses are intended to guarantee your freedom to share and change
  14. free software--to make sure the software is free for all its users.
  15. This license, the Lesser General Public License, applies to some
  16. specially designated software packages--typically libraries--of the
  17. Free Software Foundation and other authors who decide to use it. You
  18. can use it too, but we suggest you first think carefully about whether
  19. this license or the ordinary General Public License is the better
  20. strategy to use in any particular case, based on the explanations below.
  21. When we speak of free software, we are referring to freedom of use,
  22. not price. Our General Public Licenses are designed to make sure that
  23. you have the freedom to distribute copies of free software (and charge
  24. for this service if you wish); that you receive source code or can get
  25. it if you want it; that you can change the software and use pieces of
  26. it in new free programs; and that you are informed that you can do
  27. these things.
  28. To protect your rights, we need to make restrictions that forbid
  29. distributors to deny you these rights or to ask you to surrender these
  30. rights. These restrictions translate to certain responsibilities for
  31. you if you distribute copies of the library or if you modify it.
  32. For example, if you distribute copies of the library, whether gratis
  33. or for a fee, you must give the recipients all the rights that we gave
  34. you. You must make sure that they, too, receive or can get the source
  35. code. If you link other code with the library, you must provide
  36. complete object files to the recipients, so that they can relink them
  37. with the library after making changes to the library and recompiling
  38. it. And you must show them these terms so they know their rights.
  39. We protect your rights with a two-step method: (1) we copyright the
  40. library, and (2) we offer you this license, which gives you legal
  41. permission to copy, distribute and/or modify the library.
  42. To protect each distributor, we want to make it very clear that
  43. there is no warranty for the free library. Also, if the library is
  44. modified by someone else and passed on, the recipients should know
  45. that what they have is not the original version, so that the original
  46. author's reputation will not be affected by problems that might be
  47. introduced by others.
  48. Finally, software patents pose a constant threat to the existence of
  49. any free program. We wish to make sure that a company cannot
  50. effectively restrict the users of a free program by obtaining a
  51. restrictive license from a patent holder. Therefore, we insist that
  52. any patent license obtained for a version of the library must be
  53. consistent with the full freedom of use specified in this license.
  54. Most GNU software, including some libraries, is covered by the
  55. ordinary GNU Lesser General Public License. This license, the GNU Lesser
  56. General Public License, applies to certain designated libraries, and
  57. is quite different from the ordinary General Public License. We use
  58. this license for certain libraries in order to permit linking those
  59. libraries into non-free programs.
  60. When a program is linked with a library, whether statically or using
  61. a shared library, the combination of the two is legally speaking a
  62. combined work, a derivative of the original library. The ordinary
  63. General Public License therefore permits such linking only if the
  64. entire combination fits its criteria of freedom. The Lesser General
  65. Public License permits more lax criteria for linking other code with
  66. the library.
  67. We call this license the "Lesser" General Public License because it
  68. does Less to protect the user's freedom than the ordinary General
  69. Public License. It also provides other free software developers Less
  70. of an advantage over competing non-free programs. These disadvantages
  71. are the reason we use the ordinary General Public License for many
  72. libraries. However, the Lesser license provides advantages in certain
  73. special circumstances.
  74. For example, on rare occasions, there may be a special need to
  75. encourage the widest possible use of a certain library, so that it becomes
  76. a de-facto standard. To achieve this, non-free programs must be
  77. allowed to use the library. A more frequent case is that a free
  78. library does the same job as widely used non-free libraries. In this
  79. case, there is little to gain by limiting the free library to free
  80. software only, so we use the Lesser General Public License.
  81. In other cases, permission to use a particular library in non-free
  82. programs enables a greater number of people to use a large body of
  83. free software. For example, permission to use the GNU C Library in
  84. non-free programs enables many more people to use the whole GNU
  85. operating system, as well as its variant, the GNU/Linux operating
  86. system.
  87. Although the Lesser General Public License is Less protective of the
  88. users' freedom, it does ensure that the user of a program that is
  89. linked with the Library has the freedom and the wherewithal to run
  90. that program using a modified version of the Library.
  91. The precise terms and conditions for copying, distribution and
  92. modification follow. Pay close attention to the difference between a
  93. "work based on the library" and a "work that uses the library". The
  94. former contains code derived from the library, whereas the latter must
  95. be combined with the library in order to run.
  96. GNU LESSER GENERAL PUBLIC LICENSE
  97. TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
  98. 0. This License Agreement applies to any software library or other
  99. program which contains a notice placed by the copyright holder or
  100. other authorized party saying it may be distributed under the terms of
  101. this Lesser General Public License (also called "this License").
  102. Each licensee is addressed as "you".
  103. A "library" means a collection of software functions and/or data
  104. prepared so as to be conveniently linked with application programs
  105. (which use some of those functions and data) to form executables.
  106. The "Library", below, refers to any such software library or work
  107. which has been distributed under these terms. A "work based on the
  108. Library" means either the Library or any derivative work under
  109. copyright law: that is to say, a work containing the Library or a
  110. portion of it, either verbatim or with modifications and/or translated
  111. straightforwardly into another language. (Hereinafter, translation is
  112. included without limitation in the term "modification".)
  113. "Source code" for a work means the preferred form of the work for
  114. making modifications to it. For a library, complete source code means
  115. all the source code for all modules it contains, plus any associated
  116. interface definition files, plus the scripts used to control compilation
  117. and installation of the library.
  118. Activities other than copying, distribution and modification are not
  119. covered by this License; they are outside its scope. The act of
  120. running a program using the Library is not restricted, and output from
  121. such a program is covered only if its contents constitute a work based
  122. on the Library (independent of the use of the Library in a tool for
  123. writing it). Whether that is true depends on what the Library does
  124. and what the program that uses the Library does.
  125. 1. You may copy and distribute verbatim copies of the Library's
  126. complete source code as you receive it, in any medium, provided that
  127. you conspicuously and appropriately publish on each copy an
  128. appropriate copyright notice and disclaimer of warranty; keep intact
  129. all the notices that refer to this License and to the absence of any
  130. warranty; and distribute a copy of this License along with the
  131. Library.
  132. You may charge a fee for the physical act of transferring a copy,
  133. and you may at your option offer warranty protection in exchange for a
  134. fee.
  135. 2. You may modify your copy or copies of the Library or any portion
  136. of it, thus forming a work based on the Library, and copy and
  137. distribute such modifications or work under the terms of Section 1
  138. above, provided that you also meet all of these conditions:
  139. a) The modified work must itself be a software library.
  140. b) You must cause the files modified to carry prominent notices
  141. stating that you changed the files and the date of any change.
  142. c) You must cause the whole of the work to be licensed at no
  143. charge to all third parties under the terms of this License.
  144. d) If a facility in the modified Library refers to a function or a
  145. table of data to be supplied by an application program that uses
  146. the facility, other than as an argument passed when the facility
  147. is invoked, then you must make a good faith effort to ensure that,
  148. in the event an application does not supply such function or
  149. table, the facility still operates, and performs whatever part of
  150. its purpose remains meaningful.
  151. (For example, a function in a library to compute square roots has
  152. a purpose that is entirely well-defined independent of the
  153. application. Therefore, Subsection 2d requires that any
  154. application-supplied function or table used by this function must
  155. be optional: if the application does not supply it, the square
  156. root function must still compute square roots.)
  157. These requirements apply to the modified work as a whole. If
  158. identifiable sections of that work are not derived from the Library,
  159. and can be reasonably considered independent and separate works in
  160. themselves, then this License, and its terms, do not apply to those
  161. sections when you distribute them as separate works. But when you
  162. distribute the same sections as part of a whole which is a work based
  163. on the Library, the distribution of the whole must be on the terms of
  164. this License, whose permissions for other licensees extend to the
  165. entire whole, and thus to each and every part regardless of who wrote
  166. it.
  167. Thus, it is not the intent of this section to claim rights or contest
  168. your rights to work written entirely by you; rather, the intent is to
  169. exercise the right to control the distribution of derivative or
  170. collective works based on the Library.
  171. In addition, mere aggregation of another work not based on the Library
  172. with the Library (or with a work based on the Library) on a volume of
  173. a storage or distribution medium does not bring the other work under
  174. the scope of this License.
  175. 3. You may opt to apply the terms of the ordinary GNU General Public
  176. License instead of this License to a given copy of the Library. To do
  177. this, you must alter all the notices that refer to this License, so
  178. that they refer to the ordinary GNU Lesser General Public License, version 2,
  179. instead of to this License. (If a newer version than version 2 of the
  180. ordinary GNU Lesser General Public License has appeared, then you can specify
  181. that version instead if you wish.) Do not make any other change in
  182. these notices.
  183. Once this change is made in a given copy, it is irreversible for
  184. that copy, so the ordinary GNU Lesser General Public License applies to all
  185. subsequent copies and derivative works made from that copy.
  186. This option is useful when you wish to copy part of the code of
  187. the Library into a program that is not a library.
  188. 4. You may copy and distribute the Library (or a portion or
  189. derivative of it, under Section 2) in object code or executable form
  190. under the terms of Sections 1 and 2 above provided that you accompany
  191. it with the complete corresponding machine-readable source code, which
  192. must be distributed under the terms of Sections 1 and 2 above on a
  193. medium customarily used for software interchange.
  194. If distribution of object code is made by offering access to copy
  195. from a designated place, then offering equivalent access to copy the
  196. source code from the same place satisfies the requirement to
  197. distribute the source code, even though third parties are not
  198. compelled to copy the source along with the object code.
  199. 5. A program that contains no derivative of any portion of the
  200. Library, but is designed to work with the Library by being compiled or
  201. linked with it, is called a "work that uses the Library". Such a
  202. work, in isolation, is not a derivative work of the Library, and
  203. therefore falls outside the scope of this License.
  204. However, linking a "work that uses the Library" with the Library
  205. creates an executable that is a derivative of the Library (because it
  206. contains portions of the Library), rather than a "work that uses the
  207. library". The executable is therefore covered by this License.
  208. Section 6 states terms for distribution of such executables.
  209. When a "work that uses the Library" uses material from a header file
  210. that is part of the Library, the object code for the work may be a
  211. derivative work of the Library even though the source code is not.
  212. Whether this is true is especially significant if the work can be
  213. linked without the Library, or if the work is itself a library. The
  214. threshold for this to be true is not precisely defined by law.
  215. If such an object file uses only numerical parameters, data
  216. structure layouts and accessors, and small macros and small inline
  217. functions (ten lines or less in length), then the use of the object
  218. file is unrestricted, regardless of whether it is legally a derivative
  219. work. (Executables containing this object code plus portions of the
  220. Library will still fall under Section 6.)
  221. Otherwise, if the work is a derivative of the Library, you may
  222. distribute the object code for the work under the terms of Section 6.
  223. Any executables containing that work also fall under Section 6,
  224. whether or not they are linked directly with the Library itself.
  225. 6. As an exception to the Sections above, you may also combine or
  226. link a "work that uses the Library" with the Library to produce a
  227. work containing portions of the Library, and distribute that work
  228. under terms of your choice, provided that the terms permit
  229. modification of the work for the customer's own use and reverse
  230. engineering for debugging such modifications.
  231. You must give prominent notice with each copy of the work that the
  232. Library is used in it and that the Library and its use are covered by
  233. this License. You must supply a copy of this License. If the work
  234. during execution displays copyright notices, you must include the
  235. copyright notice for the Library among them, as well as a reference
  236. directing the user to the copy of this License. Also, you must do one
  237. of these things:
  238. a) Accompany the work with the complete corresponding
  239. machine-readable source code for the Library including whatever
  240. changes were used in the work (which must be distributed under
  241. Sections 1 and 2 above); and, if the work is an executable linked
  242. with the Library, with the complete machine-readable "work that
  243. uses the Library", as object code and/or source code, so that the
  244. user can modify the Library and then relink to produce a modified
  245. executable containing the modified Library. (It is understood
  246. that the user who changes the contents of definitions files in the
  247. Library will not necessarily be able to recompile the application
  248. to use the modified definitions.)
  249. b) Use a suitable shared library mechanism for linking with the
  250. Library. A suitable mechanism is one that (1) uses at run time a
  251. copy of the library already present on the user's computer system,
  252. rather than copying library functions into the executable, and (2)
  253. will operate properly with a modified version of the library, if
  254. the user installs one, as long as the modified version is
  255. interface-compatible with the version that the work was made with.
  256. c) Accompany the work with a written offer, valid for at
  257. least three years, to give the same user the materials
  258. specified in Subsection 6a, above, for a charge no more
  259. than the cost of performing this distribution.
  260. d) If distribution of the work is made by offering access to copy
  261. from a designated place, offer equivalent access to copy the above
  262. specified materials from the same place.
  263. e) Verify that the user has already received a copy of these
  264. materials or that you have already sent this user a copy.
  265. For an executable, the required form of the "work that uses the
  266. Library" must include any data and utility programs needed for
  267. reproducing the executable from it. However, as a special exception,
  268. the materials to be distributed need not include anything that is
  269. normally distributed (in either source or binary form) with the major
  270. components (compiler, kernel, and so on) of the operating system on
  271. which the executable runs, unless that component itself accompanies
  272. the executable.
  273. It may happen that this requirement contradicts the license
  274. restrictions of other proprietary libraries that do not normally
  275. accompany the operating system. Such a contradiction means you cannot
  276. use both them and the Library together in an executable that you
  277. distribute.
  278. 7. You may place library facilities that are a work based on the
  279. Library side-by-side in a single library together with other library
  280. facilities not covered by this License, and distribute such a combined
  281. library, provided that the separate distribution of the work based on
  282. the Library and of the other library facilities is otherwise
  283. permitted, and provided that you do these two things:
  284. a) Accompany the combined library with a copy of the same work
  285. based on the Library, uncombined with any other library
  286. facilities. This must be distributed under the terms of the
  287. Sections above.
  288. b) Give prominent notice with the combined library of the fact
  289. that part of it is a work based on the Library, and explaining
  290. where to find the accompanying uncombined form of the same work.
  291. 8. You may not copy, modify, sublicense, link with, or distribute
  292. the Library except as expressly provided under this License. Any
  293. attempt otherwise to copy, modify, sublicense, link with, or
  294. distribute the Library is void, and will automatically terminate your
  295. rights under this License. However, parties who have received copies,
  296. or rights, from you under this License will not have their licenses
  297. terminated so long as such parties remain in full compliance.
  298. 9. You are not required to accept this License, since you have not
  299. signed it. However, nothing else grants you permission to modify or
  300. distribute the Library or its derivative works. These actions are
  301. prohibited by law if you do not accept this License. Therefore, by
  302. modifying or distributing the Library (or any work based on the
  303. Library), you indicate your acceptance of this License to do so, and
  304. all its terms and conditions for copying, distributing or modifying
  305. the Library or works based on it.
  306. 10. Each time you redistribute the Library (or any work based on the
  307. Library), the recipient automatically receives a license from the
  308. original licensor to copy, distribute, link with or modify the Library
  309. subject to these terms and conditions. You may not impose any further
  310. restrictions on the recipients' exercise of the rights granted herein.
  311. You are not responsible for enforcing compliance by third parties with
  312. this License.
  313. 11. If, as a consequence of a court judgment or allegation of patent
  314. infringement or for any other reason (not limited to patent issues),
  315. conditions are imposed on you (whether by court order, agreement or
  316. otherwise) that contradict the conditions of this License, they do not
  317. excuse you from the conditions of this License. If you cannot
  318. distribute so as to satisfy simultaneously your obligations under this
  319. License and any other pertinent obligations, then as a consequence you
  320. may not distribute the Library at all. For example, if a patent
  321. license would not permit royalty-free redistribution of the Library by
  322. all those who receive copies directly or indirectly through you, then
  323. the only way you could satisfy both it and this License would be to
  324. refrain entirely from distribution of the Library.
  325. If any portion of this section is held invalid or unenforceable under any
  326. particular circumstance, the balance of the section is intended to apply,
  327. and the section as a whole is intended to apply in other circumstances.
  328. It is not the purpose of this section to induce you to infringe any
  329. patents or other property right claims or to contest validity of any
  330. such claims; this section has the sole purpose of protecting the
  331. integrity of the free software distribution system which is
  332. implemented by public license practices. Many people have made
  333. generous contributions to the wide range of software distributed
  334. through that system in reliance on consistent application of that
  335. system; it is up to the author/donor to decide if he or she is willing
  336. to distribute software through any other system and a licensee cannot
  337. impose that choice.
  338. This section is intended to make thoroughly clear what is believed to
  339. be a consequence of the rest of this License.
  340. 12. If the distribution and/or use of the Library is restricted in
  341. certain countries either by patents or by copyrighted interfaces, the
  342. original copyright holder who places the Library under this License may add
  343. an explicit geographical distribution limitation excluding those countries,
  344. so that distribution is permitted only in or among countries not thus
  345. excluded. In such case, this License incorporates the limitation as if
  346. written in the body of this License.
  347. 13. The Free Software Foundation may publish revised and/or new
  348. versions of the Lesser General Public License from time to time.
  349. Such new versions will be similar in spirit to the present version,
  350. but may differ in detail to address new problems or concerns.
  351. Each version is given a distinguishing version number. If the Library
  352. specifies a version number of this License which applies to it and
  353. "any later version", you have the option of following the terms and
  354. conditions either of that version or of any later version published by
  355. the Free Software Foundation. If the Library does not specify a
  356. license version number, you may choose any version ever published by
  357. the Free Software Foundation.
  358. 14. If you wish to incorporate parts of the Library into other free
  359. programs whose distribution conditions are incompatible with these,
  360. write to the author to ask for permission. For software which is
  361. copyrighted by the Free Software Foundation, write to the Free
  362. Software Foundation; we sometimes make exceptions for this. Our
  363. decision will be guided by the two goals of preserving the free status
  364. of all derivatives of our free software and of promoting the sharing
  365. and reuse of software generally.
  366. NO WARRANTY
  367. 15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
  368. WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
  369. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
  370. OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
  371. KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
  372. IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  373. PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
  374. LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
  375. THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
  376. 16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
  377. WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
  378. AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
  379. FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
  380. CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
  381. LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
  382. RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
  383. FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
  384. SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  385. DAMAGES.
  386. END OF TERMS AND CONDITIONS
  387. How to Apply These Terms to Your New Libraries
  388. If you develop a new library, and you want it to be of the greatest
  389. possible use to the public, we recommend making it free software that
  390. everyone can redistribute and change. You can do so by permitting
  391. redistribution under these terms (or, alternatively, under the terms of the
  392. ordinary General Public License).
  393. To apply these terms, attach the following notices to the library. It is
  394. safest to attach them to the start of each source file to most effectively
  395. convey the exclusion of warranty; and each file should have at least the
  396. "copyright" line and a pointer to where the full notice is found.
  397. <one line to give the library's name and a brief idea of what it does.>
  398. Copyright (C) <year> <name of author>
  399. This library is free software; you can redistribute it and/or
  400. modify it under the terms of the GNU Lesser General Public
  401. License as published by the Free Software Foundation; either
  402. version 2.1 of the License, or (at your option) any later version.
  403. This library is distributed in the hope that it will be useful,
  404. but WITHOUT ANY WARRANTY; without even the implied warranty of
  405. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  406. Lesser General Public License for more details.
  407. You should have received a copy of the GNU Lesser General Public
  408. License along with this library; if not, write to the Free Software
  409. Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  410. Also add information on how to contact you by electronic and paper mail.
  411. You should also get your employer (if you work as a programmer) or your
  412. school, if any, to sign a "copyright disclaimer" for the library, if
  413. necessary. Here is a sample; alter the names:
  414. Yoyodyne, Inc., hereby disclaims all copyright interest in the
  415. library `Frob' (a library for tweaking knobs) written by James Random Hacker.
  416. <signature of Ty Coon>, 1 April 1990
  417. Ty Coon, President of Vice
  418. That's all there is to it!