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__________________________________________________________________________ This is the Info-ZIP file COPYING (for UnZip), last updated 17 Jul 2000. __________________________________________________________________________ FIRST NOTE: This file contains some details about the copyright history of contributions to the UnZip project. Additionally, it summarises some exceptions to the general BSD-like copyright found in LICENSE that covers our generic code and most of the system specific ports. Please read LICENSE first to find out what is allowed to do with Info-ZIP's UnZip code. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - There are currently two explicit copyrights on portions of UnZip code (at least, of which Info-ZIP is aware): Jim Luther's Mac OS File Manager interface code; and Christopher Evans' MacBinaryIII coding code (for the MacOS port).. These copyrights are discussed in more detail below. All remaining code is now (starting with UnZip version 5.41) covered by the new Info-ZIP license. For details, please read the acompaning file LICENSE. The terms and conditions in this license supersede the copyright conditions of the contributions by Igor Mandrichenko (vms/vms.c), Greg Roelofs (zipinfo.c, new version of unshrink.c), Mike White (Windows DLL code in "windll/*"), Steve P. Miller (Pocket UnZip GUI "wince/*"), and Mark Adler (inflate/explode decompresseion core routines, previously put into the public domain). All these Info-ZIP contributors (or "primary" authors) have permitted us to replace their copyright notes by the Info-ZIP License. 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, only the core code of the unreduce method remained substantially similar to Mr. Smith's original source. As of UnZip 5.42, the complete core code is now covered by the Info-ZIP Licence. Therefore, support for the reduce method has been removed. The drop of the reduce method should only affect some test archives, reducing was never used in any publically distributed Zip program. For pathologic cases where support for reduced archive entries is needed, the unreduce code copyrighted by Samuel H. Smith is available as a separate distribution (the restricted copyright of this code is cited below in the "historical" section). The following copyright applies to the Mac OS File Manager interface code (macos/source/macstuff.[ch]), distributed with UnZip 5.4 and later: * MoreFiles * * A collection of File Manager and related routines * * by Jim Luther (Apple Macintosh Developer Technical Support Emeritus) * with significant code contributions by Nitin Ganatra * (Apple Macintosh Developer Technical Support Emeritus) * Copyright 1992-1998 Apple Computer, Inc. * Portions copyright 1995 Jim Luther * All rights reserved. * The Package "More Files" is distributed under the following * license terms: * * "You may incorporate this sample code into your * applications without restriction, though the * sample code has been provided "AS IS" and the * responsibility for its operation is 100% yours. * However, what you are not permitted to do is to * redistribute the source as "DSC Sample Code" after * having made changes. If you're going to * redistribute the source, we require that you make * it clear in the source that the code was descended * from Apple Sample Code, but that you've made * changes." The usage terms of this copyright note are compatible with the Info-ZIP license, they do not add further restrictions. The following copyright applies to the Mac OS "macbin3" decoding code (extra field compatibility with ZipIt): * MacBinaryIII.h * * Copyright 1997 Christopher Evans (cevans@poppybank.com) * * Basic encoding and decoding of Macintosh files to the * MacBinary III spec. * ---------------------------------------------------------------------- * This source is copyrighted by Christopher Evans (cevans@poppybank.com) * (available at ftp://ftp.lazerware.com/MacBinaryIII_src_C.sit * homepage of Leonard Rosenthol leonardr@netcom.com) This copyright note does not contain any usage terms. So, we assume that this code is freely reusable until we are proved wrong... -------------------------------------------------------------------------- The remaining copyright notes have been superseeded by the new Info-ZIP license, with explicit permission from the respective original authors. They are cited here for historical reasons, only: The following copyright applies to the full-featured unreduce.c (now distributed separately): * 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 applied to most of the VMS code in vms.c, distributed with UnZip version 4.2 and later: * Copyright (c) 1992-93 Igor Mandrichenko. * 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 unmodified and that this copyright notice is retained. ----- The following copyright applied 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 applied 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 following copyright applied to the Windows CE GUI port, ``Pocket UnZip,'' distributed with UnZip version 5.3 and later: * All the source files for Pocket UnZip, except for components * written by the Info-ZIP group, are copyrighted 1997 by Steve P. * Miller. The product "Pocket UnZip" itself is property of the * author and cannot be altered in any way without written consent * from Steve P. Miller. ----- 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. The decompression core code for the deflate method (inflate.[ch], explode.c) was originally written by Mark Adler who submitted it as public domain code. --------------------------------------------------------------------------
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