9 libogg2-zerocopy:1.1.1.1.0.2
17 date 2001.09.10.02.28.49; author jack; state Exp;
23 date 2001.09.10.02.28.49; author jack; state Exp;
38 @ GNU LIBRARY GENERAL PUBLIC LICENSE
41 Copyright (C) 1991 Free Software Foundation, Inc.
42 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
43 Everyone is permitted to copy and distribute verbatim copies
44 of this license document, but changing it is not allowed.
46 [This is the first released version of the library GPL. It is
47 numbered 2 because it goes with version 2 of the ordinary GPL.]
51 The licenses for most software are designed to take away your
52 freedom to share and change it. By contrast, the GNU General Public
53 Licenses are intended to guarantee your freedom to share and change
54 free software--to make sure the software is free for all its users.
56 This license, the Library General Public License, applies to some
57 specially designated Free Software Foundation software, and to any
58 other libraries whose authors decide to use it. You can use it for
61 When we speak of free software, we are referring to freedom, not
62 price. Our General Public Licenses are designed to make sure that you
63 have the freedom to distribute copies of free software (and charge for
64 this service if you wish), that you receive source code or can get it
65 if you want it, that you can change the software or use pieces of it
66 in new free programs; and that you know you can do these things.
68 To protect your rights, we need to make restrictions that forbid
69 anyone to deny you these rights or to ask you to surrender the rights.
70 These restrictions translate to certain responsibilities for you if
71 you distribute copies of the library, or if you modify it.
73 For example, if you distribute copies of the library, whether gratis
74 or for a fee, you must give the recipients all the rights that we gave
75 you. You must make sure that they, too, receive or can get the source
76 code. If you link a program with the library, you must provide
77 complete object files to the recipients so that they can relink them
78 with the library, after making changes to the library and recompiling
79 it. And you must show them these terms so they know their rights.
81 Our method of protecting your rights has two steps: (1) copyright
82 the library, and (2) offer you this license which gives you legal
83 permission to copy, distribute and/or modify the library.
85 Also, for each distributor's protection, we want to make certain
86 that everyone understands that there is no warranty for this free
87 library. If the library is modified by someone else and passed on, we
88 want its recipients to know that what they have is not the original
89 version, so that any problems introduced by others will not reflect on
90 the original authors' reputations.
92 Finally, any free program is threatened constantly by software
93 patents. We wish to avoid the danger that companies distributing free
94 software will individually obtain patent licenses, thus in effect
95 transforming the program into proprietary software. To prevent this,
96 we have made it clear that any patent must be licensed for everyone's
97 free use or not licensed at all.
99 Most GNU software, including some libraries, is covered by the ordinary
100 GNU General Public License, which was designed for utility programs. This
101 license, the GNU Library General Public License, applies to certain
102 designated libraries. This license is quite different from the ordinary
103 one; be sure to read it in full, and don't assume that anything in it is
104 the same as in the ordinary license.
106 The reason we have a separate public license for some libraries is that
107 they blur the distinction we usually make between modifying or adding to a
108 program and simply using it. Linking a program with a library, without
109 changing the library, is in some sense simply using the library, and is
110 analogous to running a utility program or application program. However, in
111 a textual and legal sense, the linked executable is a combined work, a
112 derivative of the original library, and the ordinary General Public License
115 Because of this blurred distinction, using the ordinary General
116 Public License for libraries did not effectively promote software
117 sharing, because most developers did not use the libraries. We
118 concluded that weaker conditions might promote sharing better.
120 However, unrestricted linking of non-free programs would deprive the
121 users of those programs of all benefit from the free status of the
122 libraries themselves. This Library General Public License is intended to
123 permit developers of non-free programs to use free libraries, while
124 preserving your freedom as a user of such programs to change the free
125 libraries that are incorporated in them. (We have not seen how to achieve
126 this as regards changes in header files, but we have achieved it as regards
127 changes in the actual functions of the Library.) The hope is that this
128 will lead to faster development of free libraries.
130 The precise terms and conditions for copying, distribution and
131 modification follow. Pay close attention to the difference between a
132 "work based on the library" and a "work that uses the library". The
133 former contains code derived from the library, while the latter only
134 works together with the library.
136 Note that it is possible for a library to be covered by the ordinary
137 General Public License rather than by this special one.
139 GNU LIBRARY GENERAL PUBLIC LICENSE
140 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
142 0. This License Agreement applies to any software library which
143 contains a notice placed by the copyright holder or other authorized
144 party saying it may be distributed under the terms of this Library
145 General Public License (also called "this License"). Each licensee is
148 A "library" means a collection of software functions and/or data
149 prepared so as to be conveniently linked with application programs
150 (which use some of those functions and data) to form executables.
152 The "Library", below, refers to any such software library or work
153 which has been distributed under these terms. A "work based on the
154 Library" means either the Library or any derivative work under
155 copyright law: that is to say, a work containing the Library or a
156 portion of it, either verbatim or with modifications and/or translated
157 straightforwardly into another language. (Hereinafter, translation is
158 included without limitation in the term "modification".)
160 "Source code" for a work means the preferred form of the work for
161 making modifications to it. For a library, complete source code means
162 all the source code for all modules it contains, plus any associated
163 interface definition files, plus the scripts used to control compilation
164 and installation of the library.
166 Activities other than copying, distribution and modification are not
167 covered by this License; they are outside its scope. The act of
168 running a program using the Library is not restricted, and output from
169 such a program is covered only if its contents constitute a work based
170 on the Library (independent of the use of the Library in a tool for
171 writing it). Whether that is true depends on what the Library does
172 and what the program that uses the Library does.
174 1. You may copy and distribute verbatim copies of the Library's
175 complete source code as you receive it, in any medium, provided that
176 you conspicuously and appropriately publish on each copy an
177 appropriate copyright notice and disclaimer of warranty; keep intact
178 all the notices that refer to this License and to the absence of any
179 warranty; and distribute a copy of this License along with the
182 You may charge a fee for the physical act of transferring a copy,
183 and you may at your option offer warranty protection in exchange for a
186 2. You may modify your copy or copies of the Library or any portion
187 of it, thus forming a work based on the Library, and copy and
188 distribute such modifications or work under the terms of Section 1
189 above, provided that you also meet all of these conditions:
191 a) The modified work must itself be a software library.
193 b) You must cause the files modified to carry prominent notices
194 stating that you changed the files and the date of any change.
196 c) You must cause the whole of the work to be licensed at no
197 charge to all third parties under the terms of this License.
199 d) If a facility in the modified Library refers to a function or a
200 table of data to be supplied by an application program that uses
201 the facility, other than as an argument passed when the facility
202 is invoked, then you must make a good faith effort to ensure that,
203 in the event an application does not supply such function or
204 table, the facility still operates, and performs whatever part of
205 its purpose remains meaningful.
207 (For example, a function in a library to compute square roots has
208 a purpose that is entirely well-defined independent of the
209 application. Therefore, Subsection 2d requires that any
210 application-supplied function or table used by this function must
211 be optional: if the application does not supply it, the square
212 root function must still compute square roots.)
214 These requirements apply to the modified work as a whole. If
215 identifiable sections of that work are not derived from the Library,
216 and can be reasonably considered independent and separate works in
217 themselves, then this License, and its terms, do not apply to those
218 sections when you distribute them as separate works. But when you
219 distribute the same sections as part of a whole which is a work based
220 on the Library, the distribution of the whole must be on the terms of
221 this License, whose permissions for other licensees extend to the
222 entire whole, and thus to each and every part regardless of who wrote
225 Thus, it is not the intent of this section to claim rights or contest
226 your rights to work written entirely by you; rather, the intent is to
227 exercise the right to control the distribution of derivative or
228 collective works based on the Library.
230 In addition, mere aggregation of another work not based on the Library
231 with the Library (or with a work based on the Library) on a volume of
232 a storage or distribution medium does not bring the other work under
233 the scope of this License.
235 3. You may opt to apply the terms of the ordinary GNU General Public
236 License instead of this License to a given copy of the Library. To do
237 this, you must alter all the notices that refer to this License, so
238 that they refer to the ordinary GNU General Public License, version 2,
239 instead of to this License. (If a newer version than version 2 of the
240 ordinary GNU General Public License has appeared, then you can specify
241 that version instead if you wish.) Do not make any other change in
244 Once this change is made in a given copy, it is irreversible for
245 that copy, so the ordinary GNU General Public License applies to all
246 subsequent copies and derivative works made from that copy.
248 This option is useful when you wish to copy part of the code of
249 the Library into a program that is not a library.
251 4. You may copy and distribute the Library (or a portion or
252 derivative of it, under Section 2) in object code or executable form
253 under the terms of Sections 1 and 2 above provided that you accompany
254 it with the complete corresponding machine-readable source code, which
255 must be distributed under the terms of Sections 1 and 2 above on a
256 medium customarily used for software interchange.
258 If distribution of object code is made by offering access to copy
259 from a designated place, then offering equivalent access to copy the
260 source code from the same place satisfies the requirement to
261 distribute the source code, even though third parties are not
262 compelled to copy the source along with the object code.
264 5. A program that contains no derivative of any portion of the
265 Library, but is designed to work with the Library by being compiled or
266 linked with it, is called a "work that uses the Library". Such a
267 work, in isolation, is not a derivative work of the Library, and
268 therefore falls outside the scope of this License.
270 However, linking a "work that uses the Library" with the Library
271 creates an executable that is a derivative of the Library (because it
272 contains portions of the Library), rather than a "work that uses the
273 library". The executable is therefore covered by this License.
274 Section 6 states terms for distribution of such executables.
276 When a "work that uses the Library" uses material from a header file
277 that is part of the Library, the object code for the work may be a
278 derivative work of the Library even though the source code is not.
279 Whether this is true is especially significant if the work can be
280 linked without the Library, or if the work is itself a library. The
281 threshold for this to be true is not precisely defined by law.
283 If such an object file uses only numerical parameters, data
284 structure layouts and accessors, and small macros and small inline
285 functions (ten lines or less in length), then the use of the object
286 file is unrestricted, regardless of whether it is legally a derivative
287 work. (Executables containing this object code plus portions of the
288 Library will still fall under Section 6.)
290 Otherwise, if the work is a derivative of the Library, you may
291 distribute the object code for the work under the terms of Section 6.
292 Any executables containing that work also fall under Section 6,
293 whether or not they are linked directly with the Library itself.
295 6. As an exception to the Sections above, you may also compile or
296 link a "work that uses the Library" with the Library to produce a
297 work containing portions of the Library, and distribute that work
298 under terms of your choice, provided that the terms permit
299 modification of the work for the customer's own use and reverse
300 engineering for debugging such modifications.
302 You must give prominent notice with each copy of the work that the
303 Library is used in it and that the Library and its use are covered by
304 this License. You must supply a copy of this License. If the work
305 during execution displays copyright notices, you must include the
306 copyright notice for the Library among them, as well as a reference
307 directing the user to the copy of this License. Also, you must do one
310 a) Accompany the work with the complete corresponding
311 machine-readable source code for the Library including whatever
312 changes were used in the work (which must be distributed under
313 Sections 1 and 2 above); and, if the work is an executable linked
314 with the Library, with the complete machine-readable "work that
315 uses the Library", as object code and/or source code, so that the
316 user can modify the Library and then relink to produce a modified
317 executable containing the modified Library. (It is understood
318 that the user who changes the contents of definitions files in the
319 Library will not necessarily be able to recompile the application
320 to use the modified definitions.)
322 b) Accompany the work with a written offer, valid for at
323 least three years, to give the same user the materials
324 specified in Subsection 6a, above, for a charge no more
325 than the cost of performing this distribution.
327 c) If distribution of the work is made by offering access to copy
328 from a designated place, offer equivalent access to copy the above
329 specified materials from the same place.
331 d) Verify that the user has already received a copy of these
332 materials or that you have already sent this user a copy.
334 For an executable, the required form of the "work that uses the
335 Library" must include any data and utility programs needed for
336 reproducing the executable from it. However, as a special exception,
337 the source code distributed need not include anything that is normally
338 distributed (in either source or binary form) with the major
339 components (compiler, kernel, and so on) of the operating system on
340 which the executable runs, unless that component itself accompanies
343 It may happen that this requirement contradicts the license
344 restrictions of other proprietary libraries that do not normally
345 accompany the operating system. Such a contradiction means you cannot
346 use both them and the Library together in an executable that you
349 7. You may place library facilities that are a work based on the
350 Library side-by-side in a single library together with other library
351 facilities not covered by this License, and distribute such a combined
352 library, provided that the separate distribution of the work based on
353 the Library and of the other library facilities is otherwise
354 permitted, and provided that you do these two things:
356 a) Accompany the combined library with a copy of the same work
357 based on the Library, uncombined with any other library
358 facilities. This must be distributed under the terms of the
361 b) Give prominent notice with the combined library of the fact
362 that part of it is a work based on the Library, and explaining
363 where to find the accompanying uncombined form of the same work.
365 8. You may not copy, modify, sublicense, link with, or distribute
366 the Library except as expressly provided under this License. Any
367 attempt otherwise to copy, modify, sublicense, link with, or
368 distribute the Library is void, and will automatically terminate your
369 rights under this License. However, parties who have received copies,
370 or rights, from you under this License will not have their licenses
371 terminated so long as such parties remain in full compliance.
373 9. You are not required to accept this License, since you have not
374 signed it. However, nothing else grants you permission to modify or
375 distribute the Library or its derivative works. These actions are
376 prohibited by law if you do not accept this License. Therefore, by
377 modifying or distributing the Library (or any work based on the
378 Library), you indicate your acceptance of this License to do so, and
379 all its terms and conditions for copying, distributing or modifying
380 the Library or works based on it.
382 10. Each time you redistribute the Library (or any work based on the
383 Library), the recipient automatically receives a license from the
384 original licensor to copy, distribute, link with or modify the Library
385 subject to these terms and conditions. You may not impose any further
386 restrictions on the recipients' exercise of the rights granted herein.
387 You are not responsible for enforcing compliance by third parties to
390 11. If, as a consequence of a court judgment or allegation of patent
391 infringement or for any other reason (not limited to patent issues),
392 conditions are imposed on you (whether by court order, agreement or
393 otherwise) that contradict the conditions of this License, they do not
394 excuse you from the conditions of this License. If you cannot
395 distribute so as to satisfy simultaneously your obligations under this
396 License and any other pertinent obligations, then as a consequence you
397 may not distribute the Library at all. For example, if a patent
398 license would not permit royalty-free redistribution of the Library by
399 all those who receive copies directly or indirectly through you, then
400 the only way you could satisfy both it and this License would be to
401 refrain entirely from distribution of the Library.
403 If any portion of this section is held invalid or unenforceable under any
404 particular circumstance, the balance of the section is intended to apply,
405 and the section as a whole is intended to apply in other circumstances.
407 It is not the purpose of this section to induce you to infringe any
408 patents or other property right claims or to contest validity of any
409 such claims; this section has the sole purpose of protecting the
410 integrity of the free software distribution system which is
411 implemented by public license practices. Many people have made
412 generous contributions to the wide range of software distributed
413 through that system in reliance on consistent application of that
414 system; it is up to the author/donor to decide if he or she is willing
415 to distribute software through any other system and a licensee cannot
418 This section is intended to make thoroughly clear what is believed to
419 be a consequence of the rest of this License.
421 12. If the distribution and/or use of the Library is restricted in
422 certain countries either by patents or by copyrighted interfaces, the
423 original copyright holder who places the Library under this License may add
424 an explicit geographical distribution limitation excluding those countries,
425 so that distribution is permitted only in or among countries not thus
426 excluded. In such case, this License incorporates the limitation as if
427 written in the body of this License.
429 13. The Free Software Foundation may publish revised and/or new
430 versions of the Library General Public License from time to time.
431 Such new versions will be similar in spirit to the present version,
432 but may differ in detail to address new problems or concerns.
434 Each version is given a distinguishing version number. If the Library
435 specifies a version number of this License which applies to it and
436 "any later version", you have the option of following the terms and
437 conditions either of that version or of any later version published by
438 the Free Software Foundation. If the Library does not specify a
439 license version number, you may choose any version ever published by
440 the Free Software Foundation.
442 14. If you wish to incorporate parts of the Library into other free
443 programs whose distribution conditions are incompatible with these,
444 write to the author to ask for permission. For software which is
445 copyrighted by the Free Software Foundation, write to the Free
446 Software Foundation; we sometimes make exceptions for this. Our
447 decision will be guided by the two goals of preserving the free status
448 of all derivatives of our free software and of promoting the sharing
449 and reuse of software generally.
453 15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
454 WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
455 EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
456 OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
457 KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
458 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
459 PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
460 LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
461 THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
463 16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
464 WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
465 AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
466 FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
467 CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
468 LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
469 RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
470 FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
471 SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
474 END OF TERMS AND CONDITIONS
476 How to Apply These Terms to Your New Libraries
478 If you develop a new library, and you want it to be of the greatest
479 possible use to the public, we recommend making it free software that
480 everyone can redistribute and change. You can do so by permitting
481 redistribution under these terms (or, alternatively, under the terms of the
482 ordinary General Public License).
484 To apply these terms, attach the following notices to the library. It is
485 safest to attach them to the start of each source file to most effectively
486 convey the exclusion of warranty; and each file should have at least the
487 "copyright" line and a pointer to where the full notice is found.
489 <one line to give the library's name and a brief idea of what it does.>
490 Copyright (C) <year> <name of author>
492 This library is free software; you can redistribute it and/or
493 modify it under the terms of the GNU Library General Public
494 License as published by the Free Software Foundation; either
495 version 2 of the License, or (at your option) any later version.
497 This library is distributed in the hope that it will be useful,
498 but WITHOUT ANY WARRANTY; without even the implied warranty of
499 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
500 Library General Public License for more details.
502 You should have received a copy of the GNU Library General Public
503 License along with this library; if not, write to the Free
504 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
506 Also add information on how to contact you by electronic and paper mail.
508 You should also get your employer (if you work as a programmer) or your
509 school, if any, to sign a "copyright disclaimer" for the library, if
510 necessary. Here is a sample; alter the names:
512 Yoyodyne, Inc., hereby disclaims all copyright interest in the
513 library `Frob' (a library for tweaking knobs) written by James Random Hacker.
515 <signature of Ty Coon>, 1 April 1990
516 Ty Coon, President of Vice
518 That's all there is to it!