COPYING
资源名称:zipsrc.zip [点击查看]
上传用户:jlteech
上传日期:2007-01-06
资源大小:349k
文件大小:9k
源码类别:
压缩解压
开发平台:
Visual C++
- __________________________________________________________________________
- This is the Info-ZIP file COPYING (for Wiz), last updated 3 Nov 97.
- __________________________________________________________________________
- There are currently six explicit copyrights on portions of UnZip
- code (at least, of which Info-ZIP is aware): the original Sam Smith
- copyright on unzip 2.0, upon which Info-ZIP's UnZip 3.0 was based;
- Igor Mandrichenko's copyright on his routines in vms.c; Greg Roelofs'
- copyright on zipinfo.c and the new version of unshrink.c; Mike White's
- copyright on the Windows DLL code (windll/*); Steve P. Miller's
- copyright on the Pocket UnZip GUI (wince/*); and Norbert Pueschel's
- copyright on the Amiga time.lib code. In addition, Mark Adler has
- placed inflate.h, inflate.c, explode.c and funzip.c into the public
- domain; i.e., these files may be used without any restrictions beyond
- those of simple courtesy (credit where it's due). All of these are
- discussed immediately below. The remaining code is covered by an im-
- plicit copyright under US law. Frequently Asked Questions regarding
- (re)distribution of Zip and UnZip are near the end of this file.
- There are no known patents on any of the code in UnZip. Unisys
- claims a patent on LZW encoding and on LZW decoding _in an apparatus
- that performs LZW encoding_, but the patent appears to exempt a stand-
- alone decoder (as in UnZip's unshrink.c). Unisys has publicly claimed
- otherwise, but the issue has never been tested in court. Since this
- point is unclear, unshrinking is not enabled by default. It is the
- responsibility of the user to make his or her peace with Unisys and
- its licensing requirements. (unshrink.c may be removed from future
- releases altogether.)
- __________________________________________________________________________
- The original unzip source code has been extensively modified and
- almost entirely rewritten (changes include random zipfile access
- rather than sequential; replacement of unimplode() with explode();
- replacement of old unshrink() with new (unrelated) unshrink(); re-
- placement of output routines; addition of inflate(), wildcards,
- filename-mapping, text translation, ...; etc.). As far as we can
- tell, the only remaining code that is substantially similar to
- Mr. Smith's is that in the file unreduce.c, which now by default
- is NOT compiled. The following copyright applies to unreduce.c:
- * Copyright 1989 Samuel H. Smith; All rights reserved
- *
- * Do not distribute modified versions without my permission.
- * Do not remove or alter this notice or any other copyright notice.
- * If you use this in your own program you must distribute source code.
- * Do not use any of this in a commercial product.
- Regarding the first stipulation, Mr. Smith was tracked down in southern
- California some years back [Samuel H. Smith, The Tool Shop; as of mid-
- May 1994, (213) 851-9969 (voice), (213) 887-2127(?) (subscription BBS),
- 71150.2731@compuserve.com]:
- "He says that he thought that whoever contacted him understood that
- he has no objection to the Info-ZIP group's inclusion of his code.
- His primary concern is that it remain freely distributable, he said."
- Despite the fact that our "normal" code has been entirely rewritten
- and by default no longer contains any of Mr. Smith's code, Info-ZIP
- remains indebted and grateful to him. We hope he finds our contribu-
- tions as useful as we have his.
- Note that the third and fourth stipulations still apply to any com-
- pany that wishes to incorporate the unreduce code into its products;
- if you wish to do so, you must contact Mr. Smith directly regarding
- licensing.
- The following copyright applies to the new version of unshrink.c,
- distributed with UnZip version 5.2 and later:
- * Copyright (c) 1994 Greg Roelofs.
- * Permission is granted to any individual/institution/corporate
- * entity to use, copy, redistribute or modify this software for
- * any purpose whatsoever, subject to the conditions noted in the
- * Frequently Asked Questions section below, plus one additional
- * condition: namely, that my name not be removed from the source
- * code. (Other names may, of course, be added as modifications
- * are made.) Corporate legal staff (like at IBM :-) ) who have
- * problems understanding this can contact me through Zip-Bugs...
- The following copyright applies to the Windows DLL code (windll/*),
- distributed with UnZip version 5.2 and later:
- * Copyright (c) 1996 Mike White.
- * Permission is granted to any individual or institution to use,
- * copy, or redistribute this software so long as all of the original
- * files are included, that it is not sold for profit, and that this
- * copyright notice is retained.
- The remaining code was written by many people associated with the
- Info-ZIP group, with large contributions from (but not limited to):
- Greg Roelofs (overall program logic, ZipInfo, unshrink, filename
- mapping/portability, etc.), Mark Adler (inflate, explode, funzip),
- Kai Uwe Rommel (OS/2), John Bush and Paul Kienitz (Amiga), Antoine
- Verheijen (Macintosh), Hunter Goatley (more VMS), Mike White (Windows
- DLLs), Christian Spieler (overall logic, optimization, VMS, etc.) and
- others. See the file CONTRIBS in the source distribution for a much
- more complete list of contributors. As noted above, Mark Adler's
- inflate.[ch], explode.c and funzip.c are in the public domain, and
- everything that isn't otherwise accounted for is implicitly copy-
- righted by Info-ZIP. In other words, use it with our blessings, but
- it's still our code. Thank you!
- --------------------------------------------------------------------------
- Frequently Asked Questions about distributing Zip and UnZip:
- Q. Can I distribute Zip and UnZip sources and/or executables?
- A. You may redistribute the latest official distributions without
- any modification, and without even asking us for permission.
- (Note that an "executable distribution" includes documentation,
- even if it's in a separate zipfile; plain executables do NOT
- count.) You can charge for the cost of the media (CDROM, disk-
- ettes, etc.), the compilation (e.g., of a software archive),
- and a small copying fee. Distributed archives should follow
- the naming conventions used in the `WHERE' file. If you want
- to distribute modified versions, please contact us at
- Zip-Bugs@lists.wku.edu first. You must not distribute beta
- versions without explicit permission to do so.
- Q. Can I use the executables (or DLLs) of Zip and UnZip to distribute
- my software?
- A. Yes, so long as it is clear that Zip and UnZip are not being
- sold, that the source code is freely available, and that there
- are no extra or hidden charges resulting from its use by or in-
- clusion with the commercial product. Here is an example of a
- suitable notice:
- NOTE: <Product> is packaged on this CD using Info-ZIP's
- compression utility. The installation program uses UnZip
- to read zip files from the CD. Info-ZIP's software (Zip,
- UnZip and related utilities) is free and can be obtained
- as source code or executables from Internet/WWW sites,
- including http://www.cdrom.com/pub/infozip/ .
- If the distribution is being done with UnZipSFX instead of a DLL
- or stand-alone copy of UnZip (i.e., as one or more self-extracting
- archives), no notice is required as long as the normal UnZipSFX
- banner has not been removed.
- Q. Can I use the source code of Zip and UnZip in my commercial
- application?
- A. Yes, so long as you include in your product an acknowledgment; a
- pointer to the original, free compression sources; and a statement
- making it clear that there are no extra or hidden charges resulting
- from the use of our compression code in your product (see below for
- an example). The acknowledgment should appear in at least one piece
- of human-readable documentation (e.g., a README file or man page),
- although additionally putting it in the executable(s) is OK, too.
- In other words, you are allowed to sell only your own work, not ours,
- and we'd like a little credit. (Note the additional restrictions
- above on the code in unreduce.c, unshrink.c, vms.c, time_lib.c, and
- everything in the wince and windll subdirectories.) Contact us at
- Zip-Bugs@lists.wku.edu if you have special requirements. We also
- like to hear when our code is being used, but we don't require that.
- <Product> incorporates compression code from the Info-ZIP group.
- There are no extra charges or costs due to the use of this code,
- and the original compression sources are freely available from
- http://www.cdrom.com/pub/infozip/ or ftp://ftp.cdrom.com/pub/infozip/
- on the Internet.
- If you only need compression capability, not full zipfile support,
- you might want to look at zlib instead; it has fewer restrictions
- on commercial use. See http://www.cdrom.com/pub/infozip/zlib/ .
- __________________________________________________________________________