where

给出了 zip 压缩算法的完整实现过程。

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   This is the Info-ZIP file ``WHERE,'' last updated on 31 May 2006.
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   The latest version of this file can be found online at:

           ftp://ftp.info-zip.org/pub/infozip/doc/WHERE

   Note that some ftp sites may not yet have the latest versions of Zip
   and UnZip when you read this.  The latest versions always appear in
   ftp://ftp.info-zip.org/pub/infozip/ (and subdirectories thereof) first,
   except for encryption binaries, which always appear in
   ftp://ftp.icce.rug.nl/infozip/ (and subdirectories) first.

   IF YOU FIND AN ERROR:  please let us know!  We don't have time to
   check each and every site personally (or even collectively), so any
   number of the sites listed below may have moved or disappeared en-
   tirely.  E-mail to [e-mail] and we'll update this file.
__________________________________________________________________________


Info-ZIP's home WWW site is listed on Yahoo and is at:

   ftp://ftp.info-zip.org/pub/infozip/Info-ZIP.html  (master version)
   http://ftp.info-zip.org/pub/infozip/              (master version)
   http://www.info-zip.org/

Note that the old sites at http://www.cdrom.com/pub/infozip/ and
http://www.freesoftware.com/pub/infozip are PERMANENTLY BROKEN.  They
cannot be updated or removed, apparently.

The Zip and UnZip pages have links to most known mirror sites carrying our
source and/or binary distributions, and they generally are more up-to-date
and have better information than what you are reading:

   ftp://ftp.info-zip.org/pub/infozip/Zip.html
   ftp://ftp.info-zip.org/pub/infozip/UnZip.html

The related zlib package by Info-ZIP's Jean-loup Gailly and Mark Adler is at:

   http://www.zlib.net/

Source-code archives for Info-ZIP's portable Zip, UnZip, and related
utilities:

   zip232.zip        Zip 2.32 (deflation; includes zipnote/zipsplit/zipcloak)
   zip232.tar.Z      ditto, compress'd tar format

   zip11.zip         Zip 1.1 (shrinking, implosion; compatible w. PKUNZIP 1.1)
   zip11.tar.Z       ditto, compress'd tar format

   unzip552.zip      UnZip 5.52 (all methods[*]; unzip/funzip/unzipsfx/zipgrep)
   unzip552.tar.gz   ditto, gzip'd tar format
   unzip552.tar.Z    ditto, compress'd tar format

   unred552.zip      UnZip 5.52 add-on, contains copyrighted unreduce support

   zcrypt291.zip     encryption support for Zip 2.3[**]
   zcrypt10.zip      encryption support for Zip 1.1

   MacZip106src.zip  contains all the GUI stuff and the project files to build
                     the MacZip main-app.  To build MacZip successfully, both
                     the Zip 2.32 and UnZip 5.52 sources are required, too.

   wiz502.zip        WiZ 5.02, Windows 9x/NT GUI front-end for Info-ZIP DLLs
   wiz502+dlls.zip   WiZ 5.02, Windows 9x/NT GUI front-end plus DLL sources

[*] Unreducing is disabled by default, but is available as add-on.
    As of July 2004, Unisys's LZW patent was expired worldwide, and
    unshrinking is turned on by default since the release of UnZip 5.52.
    See UnZip's INSTALL file for details.

[**] As of January 2000, US export regulations were amended to allow export
     of free encryption source code from the US.  As of June 2002, these
     regulations were further relaxed to allow export of encryption binaries
     associated with free encryption source code.  The Zip 2.32, UnZip 5.52
     and Wiz 5.02 archives now include full crypto source code.  As of the
     Zip 2.32 release, all official binaries include encryption support; the
     former "zcr" archives ceased to exist.
     (Note that restrictions may still exist in other countries, of course.)

Executables archives (and related files) for Info-ZIP's software; not all
of these will be immediately available due to lack of access to appropriate
systems on the part of Info-ZIP members.

   zip232x.zip       MSDOS executables and docs
   zip232x1.zip      OS/2 1.x (16-bit) executables and docs
   zip232x2.zip      OS/2 2/3/4.x (32-bit) executables and docs
   zip232xA.zip      Amiga executables and docs
   zip232xB.zip      BeOS executables and docs
   zip232xC.zip      VM/CMS executable and docs
   zip232xK.zip      Tandem NSK executables and docs
   zip232xM.xmit     MVS classic executable
   zip232xM-docs.zip MVS classic port, docs only
   zip232dN.zip      WinNT/Win9x (Intel) DLL, header files, docs
   zip232xN.zip      WinNT/Win9x (Intel) executables and docs
   zip232xN-axp.zip  WinNT (Alpha AXP) executables and docs
   zip232xN-mip.zip  WinNT (MIPS R4000) executables and docs
   zip232xN-ppc.zip  WinNT (PowerPC) executables and docs
   zip232xO.zip      IBM OS/390 Open Edition binaries and docs
   zip232xQ.zip      SMS/QDOS executables and docs
   zip232xR.zip      Acorn RISC OS executables and docs
   zip232xT.zip      Atari TOS executables and docs
   zip232-vms-axp-obj.zip
                     VMS (Alpha AXP) object libs, link procedure and docs
   zip232-vms-axp-exe.zip
                     VMS (Alpha AXP) executables for VMS 6.1 or later and docs
   zip232-vms-vax-decc-obj.zip
                     VMS (VAX) object libs (new DEC C), link procedure and docs
   zip232-vms-vax-decc-exe.zip
                     VMS (VAX) executables (DEC C) for VMS 6.1 or later; docs
   zip232-vms-vax-vaxc-obj.zip
                     VMS (VAX) object libs (old VAX C), link procedure and docs
   zip232x.hqx       Macintosh BinHex'd executables and docs

   unz552x.exe       MSDOS self-extracting executable (16-bit unzip, ..., docs)
   unz552x3.exe      MSDOS self-extracting executable (16-, 32-bit unzip, docs)
   unz552x1.exe      OS/2 1.x (16-bit) self-extracting executables and docs
   unz552x2.exe      OS/2 2/3/4.x (32-bit) self-extracting executables and docs
   unz552d2.zip      OS/2 2/3/4.x (32-bit) DLL, header file, demo exe and docs
   unz552xA.ami      Amiga self-extracting executables and docs
   unz552xA.lha      Amiga executables and docs, LHa archive
   unz552xB.sfx      BeOS self-extracting executables and docs
   unz552xB.tar.gz   BeOS executables and docs, gzip'd tar archive
   unz552xC.mod      VM/CMS executable module in "packed" format
   unz552xC-docs.zip VM/CMS docs, only
   unz552xF.zip      FlexOS executable and docs
   unz552xK.zip      Tandem NSK executable and docs
   unz552xM.xmit     MVS classic executable
   unz552xM-docs.zip MVS classic port, docs only
   unz552dN.zip      NT4/W2K/XP/2K3/W9x (32-bit Intel) DLL, header files, docs
   unz552xN.exe      NT/2K/XP/2K3/W9x self-extracting i386 executables and docs
   unz552xN-axp.exe  WinNT (Alpha AXP) self-extracting executables and docs
   unz552xN-mip.exe  WinNT (MIPS R4000) self-extracting executables and docs
   unz552xN-ppc.exe  WinNT (PowerPC) self-extracting executables and docs
   unz552xQ.sfx      SMS/QDOS self-extracting executables and docs
   unz552xO.tar.Z    IBM OS/390 Open edition (Unix-like), exes and docs
   unz552xR.exe      Acorn RISC OS self-extracting executables and docs
   unz552xR.spk      Acorn RISC OS Spark'd executables and docs
   unz552xT.tos      Atari TOS self-extracting executables and docs
   unz552x-vms-axp-obj.bck    VMS backup saveset,
                     contains UnZip (Alpha) obj libs, link procedure, docs
   unz552x-vms-axp-obj.exe    VMS (Alpha AXP) SFX archive (statically linked),
                     contains UnZip (Alpha) obj libs, link procedure, docs
   unz552x-vms-axp-exe.exe    VMS (Alpha AXP) SFX archive (dynamically linked),
                     contains UnZip (Alpha AXP, DEC C) executables and docs,
                     smaller than object archive, but requires VMS 6.1
   unz552x-vms-vax-decc-obj.bck   VMS backup saveset,
                     contains UnZip (new DEC C) obj libs, link procedure, docs
   unz552x-vms-vax-decc-obj.exe   VMS (VAX) SFX archive (statically linked),
                     contains UnZip (new DEC C) obj libs, link procedure, docs
   unz552x-vms-vax-decc-exe.exe   VMS (VAX) SFX archive (dynamically linked),
                     contains UnZip (new DEC C) executables and docs,
                     smaller than object archive, but requires VMS 6.1
   unz552x-vms-vax-vaxc-obj.bck   VMS backup saveset,
                     contains UnZip (old VAX C) obj libs, link procedure, docs
   unz552x-vms-vax-vaxc-obj.exe   VMS (VAX) SFX archive (statically linked),
                     contains UnZip (old VAX C) obj libs, link procedure, docs
   unz552x.hqx       Macintosh BinHex'd executables and docs for unzip
  (unz552x.tar.{Z,gz}  Unix exes/docs for Solaris 2.x, SCO Unix, Linux, etc.,
                     depending on directory/location; generally only provided
                     in cases where the OS does *not* ship with a bundled C
                     compiler)

   MacZip106nc.hqx   Macintosh combined Zip&UnZip application with GUI,
                     executables and docs (no encryption)
   MacZip106c.hqx    Macintosh combined Zip&UnZip application with GUI,
                     executables and docs (with encryption)

   wiz502xN.exe      WiZ 5.02 32-bit (Win9x/NT/2K/XP/2K3) app+docs (self-extr.)

   UnzpHist.zip      complete changes-history of UnZip and its precursors
   ZipHist.zip       complete changes-history of Zip

ftp/web sites for the US-exportable sources and executables:

   NOTE:  Look for the Info-ZIP file names given above (not PKWARE or third-
   party stuff) in the following locations.  Some sites like to use slightly
   different names, such as zip-2.32.tar.gz instead of zip232.tar.Z.

   ftp://ftp.info-zip.org/pub/infozip/                 [THE INFO-ZIP HOME SITE]
   ftp://sunsite.doc.ic.ac.uk/packages/zip/    [MIRRORS THE INFO-ZIP HOME SITE]
   ftp://unix.hensa.ac.uk/mirrors/uunet/pub/archiving/zip/

   ftp://ftp.cmdl.noaa.gov/aerosol/doc/archiver/{all,dos,os2,mac,vax_alpha}/
   ftp://garbo.uwasa.fi/pc/arcers/                    [AND OTHER GARBO MIRRORS]
   ftp://garbo.uwasa.fi/unix/arcers/                  [AND OTHER GARBO MIRRORS]
   ftp://ftp.elf.stuba.sk/pub/pc/pack/                [AND OTHER STUBA MIRRORS]
   ftp://ftp-os2.cdrom.com/pub/os2/archiver/
   ftp://ftp-os2.nmsu.edu/os2/archiver/
   ftp://ftp.informatik.tu-muenchen.de/pub/comp/os/os2/archiver/
   ftp://sumex-aim.stanford.edu/info-mac/cmp/
   ftp://ftp.wustl.edu/pub/aminet/util/arc/          [AND OTHER AMINET MIRRORS]
   ftp://atari.archive.umich.edu/pub/Archivers/       [AND OTHER UMICH MIRRORS]
   http://www.umich.edu/~archive/atari/Archivers/
   ftp://jake.educom.com.au/pub/infozip/acorn/                  [Acorn RISC OS]
   http://www.sitec.net/maczip/                                   [MacZip port]

ftp/web sites for the encryption and decryption sources and/or executables:

   Outside the US:
      ftp://ftp.info-zip.org/pub/infozip/   [THE INFO-ZIP HOME SITE]
      ftp://ftp.icce.rug.nl/infozip/        [THE INFO-ZIP ENCRYPTION HOME SITE]
      ftp://ftp.elf.stuba.sk/pub/pc/pack/
      ftp://garbo.uwasa.fi/pc/arcers/
      ftp://ftp.inria.fr/system/arch-compr/
      ftp://ftp.leo.org/pub/comp/os/os2/leo/archiver/
        (mail server at [e-mail])

      ftp://ftp.win.tue.nl/pub/compression/zip/
      ftp://ftp.uni-erlangen.de/pub/pc/msdos/arc-utils/zip/


The primary distribution site for the MacZip port can be found at:

   http://www.sitec.net/maczip/

ftp sites for VMS-format Zip and UnZip packages (sources, object files and
executables, no encryption/decryption--see also "Mail servers" section below):

   ftp.spc.edu [192.107.46.27] and ftp.wku.edu:

   [.MACRO32]AAAREADME.TXT
   [.MACRO32.SAVESETS]UNZIP.BCK  or  UNZIP.ZIP  (if already have older version)
   [.MACRO32.SAVESETS]ZIP.ZIP

To find other ftp/web sites:

   The "archie" ftp database utility can be used to find an ftp site near
   you (although the command-line versions always seem to find old ver-
   sions...the `FTPsearch' server at http://ftpsearch.ntnu.no/ftpsearch
   --formerly `Archie 95'--is quite up-to-date, however).  Or check a stan-
   dard WWW search engine like AltaVista (http://www.altavista.digital.com/)
   or Yahoo (http://www.yahoo.com/).  If you don't know how to use these,
   DON'T ASK US--read the web sites' help pages or check the Usenet groups
   news.announce.newusers or news.answers or some such, or ask your system
   administrator.

Mail servers:

   To get the encryption sources by e-mail, send the following commands
   to [e-mail]:

      get /pub/comp/os/os2/archiver/zcrypt291.zip
      quit

   To get the VMS Zip/UnZip package by e-mail, send the following
   commands in the body of a mail message to [e-mail] (the
   "HELP" command is also accepted):

      SEND FILESERV_TOOLS
      SEND UNZIP
      SEND ZIP

   To get Atari executables by e-mail, send a message to
   [e-mail] for information about the mail server.
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