The files crypt.h, ioapi.c, ioapi.h, miniunz, unzip.c and unzip.h are
from contrib/ in zlib (copyright below).  The code was adapted for
libextractor and extended to support OpenOffice meta-data extraction
by Christian Grothoff.

  Copyright (C) 1998-2003 Gilles Vollant

   This unzip package allow extract file from .ZIP file, compatible with PKZip 2.04g
     WinZip, InfoZip tools and compatible.
   Encryption and multi volume ZipFile (span) are not supported.
   Old compressions used by old PKZip 1.x are not supported


   I WAIT FEEDBACK at mail info@winimage.com
   Visit also http://www.winimage.com/zLibDll/unzip.htm for evolution

   Condition of use and distribution are the same than zlib :

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software
     in a product, an acknowledgment in the product documentation would be
     appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.


Original ChangeLog (from before LE integration):


Change in 1.00: (10 sept 03)
- rename to 1.00
- cosmetic code change

Change in 0.22: (19 May 03)
- crypting support (unless you define NOCRYPT)
- append file in existing zipfile

Change in 0.21: (10 Mar 03)
- bug fixes

Change in 0.17: (27 Jan 02)
- bug fixes

Change in 0.16: (19 Jan 02)
- Support of ioapi for virtualize zip file access

Change in 0.15: (19 Mar 98)
- fix memory leak in minizip.c

Change in 0.14: (10 Mar 98)
- fix bugs in minizip.c sample for zipping big file
- fix problem in month in date handling
- fix bug in unzlocal_GetCurrentFileInfoInternal in unzip.c for
    comment handling

Change in 0.13: (6 Mar 98)
- fix bugs in zip.c
- add real minizip sample

Change in 0.12: (4 Mar 98)
- add zip.c and zip.h for creates .zip file
- fix change_file_date in miniunz.c for Unix (Jean-loup Gailly)
- fix miniunz.c for file without specific record for directory

Change in 0.11: (3 Mar 98)
- fix bug in unzGetCurrentFileInfo for get extra field and comment
- enhance miniunz sample, remove the bad unztst.c sample

Change in 0.10: (2 Mar 98)
- fix bug in unzReadCurrentFile
- rename unzip* to unz* function and structure
- remove Windows-like hungary notation variable name
- modify some structure in unzip.h
- add somes comment in source
- remove unzipGetcCurrentFile function
- replace ZUNZEXPORT by ZEXPORT
- add unzGetLocalExtrafield for get the local extrafield info
- add a new sample, miniunz.c

Change in 0.4: (25 Feb 98)
- suppress the type unzipFileInZip.
  Only on file in the zipfile can be open at the same time
- fix somes typo in code
- added tm_unz structure in unzip_file_info (date/time in readable format)