xzip.h

存C写的zip压缩、解压缩源代码。主要对文件操作

// XZip.h  Version 1.3
//
// Authors:      Mark Adler et al. (see below)
//
// Modified by:  Lucian Wischik
//               [e-mail]
//
// Version 1.0   - Turned C files into just a single CPP file
//               - Made them compile cleanly as C++ files
//               - Gave them simpler APIs
//               - Added the ability to zip/unzip directly in memory without 
//                 any intermediate files
// 
// Modified by:  Hans Dietrich
//               [e-mail]
//
///////////////////////////////////////////////////////////////////////////////
//
// Lucian Wischik's comments:
// --------------------------
// THIS FILE is almost entirely based upon code by info-zip.
// It has been modified by Lucian Wischik.
// The original code may be found at http://www.info-zip.org
// The original copyright text follows.
//
///////////////////////////////////////////////////////////////////////////////
//
// Original authors' comments:
// ---------------------------
// This is version 2002-Feb-16 of the Info-ZIP copyright and license. The 
// definitive version of this document should be available at 
// ftp://ftp.info-zip.org/pub/infozip/license.html indefinitely.
// 
// Copyright (c) 1990-2002 Info-ZIP.  All rights reserved.
//
// For the purposes of this copyright and license, "Info-ZIP" is defined as
// the following set of individuals:
//
//   Mark Adler, John Bush, Karl Davis, Harald Denker, Jean-Michel Dubois,
//   Jean-loup Gailly, Hunter Goatley, Ian Gorman, Chris Herborth, Dirk Haase,
//   Greg Hartwig, Robert Heath, Jonathan Hudson, Paul Kienitz, 
//   David Kirschbaum, Johnny Lee, Onno van der Linden, Igor Mandrichenko, 
//   Steve P. Miller, Sergio Monesi, Keith Owens, George Petrov, Greg Roelofs, 
//   Kai Uwe Rommel, Steve Salisbury, Dave Smith, Christian Spieler, 
//   Antoine Verheijen, Paul von Behren, Rich Wales, Mike White
//
// This software is provided "as is", without warranty of any kind, express
// or implied.  In no event shall Info-ZIP or its contributors be held liable
// for any direct, indirect, incidental, special or consequential damages
// arising out of the use of or inability to use 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. Redistributions of source code must retain the above copyright notice,
//       definition, disclaimer, and this list of conditions.
//
//    2. Redistributions in binary form (compiled executables) must reproduce 
//       the above copyright notice, definition, disclaimer, and this list of 
//       conditions in documentation and/or other materials provided with the 
//       distribution. The sole exception to this condition is redistribution 
//       of a standard UnZipSFX binary as part of a self-extracting archive; 
//       that is permitted without inclusion of this license, as long as the 
//       normal UnZipSFX banner has not been removed from the binary or disabled.
//
//    3. Altered versions--including, but not limited to, ports to new 
//       operating systems, existing ports with new graphical interfaces, and 
//       dynamic, shared, or static library versions--must be plainly marked 
//       as such and must not be misrepresented as being the original source.  
//       Such altered versions also must not be misrepresented as being 
//       Info-ZIP releases--including, but not limited to, labeling of the 
//       altered versions with the names "Info-ZIP" (or any variation thereof, 
//       including, but not limited to, different capitalizations), 
//       "Pocket UnZip", "WiZ" or "MacZip" without the explicit permission of 
//       Info-ZIP.  Such altered versions are further prohibited from 
//       misrepresentative use of the Zip-Bugs or Info-ZIP e-mail addresses or 
//       of the Info-ZIP URL(s).
//
//    4. Info-ZIP retains the right to use the names "Info-ZIP", "Zip", "UnZip",
//       "UnZipSFX", "WiZ", "Pocket UnZip", "Pocket Zip", and "MacZip" for its 
//       own source and binary releases.
//
///////////////////////////////////////////////////////////////////////////////

#ifndef XZIP_H
#define XZIP_H

// ZIP functions -- for creating zip files
// This file is a repackaged form of the Info-Zip source code available
// at www.info-zip.org. The original copyright notice may be found in
// zip.cpp. The repackaging was done by Lucian Wischik to simplify its
// use in Windows/C++.

#ifndef XUNZIP_H
DECLARE_HANDLE(HZIP);		// An HZIP identifies a zip file that is being created
#endif

typedef DWORD ZRESULT;		// result codes from any of the zip functions. Listed later.

// flag values passed to some functions
#define ZIP_HANDLE   1
#define ZIP_FILENAME 2
#define ZIP_MEMORY   3
#define ZIP_FOLDER   4


///////////////////////////////////////////////////////////////////////////////
//
// CreateZip()
//
// Purpose:     Create a zip archive file
//
// Parameters:  z      - archive file name if flags is ZIP_FILENAME;  for other
//                       uses see below
//              len    - for memory (ZIP_MEMORY) should be the buffer size;
//                       for other uses, should be 0
//              flags  - indicates usage, see below;  for files, this will be
//                       ZIP_FILENAME
//
// Returns:     HZIP   - non-zero if zip archive created ok, otherwise 0
//
HZIP CreateZip(void *z, unsigned int len, DWORD flags);
// CreateZip - call this to start the creation of a zip file.
// As the zip is being created, it will be stored somewhere:
// to a pipe:              CreateZip(hpipe_write, 0,ZIP_HANDLE);
// in a file (by handle):  CreateZip(hfile, 0,ZIP_HANDLE);
// in a file (by name):    CreateZip("c:\\test.zip", 0,ZIP_FILENAME);
// in memory:              CreateZip(buf, len,ZIP_MEMORY);
// or in pagefile memory:  CreateZip(0, len,ZIP_MEMORY);
// The final case stores it in memory backed by the system paging file,
// where the zip may not exceed len bytes. This is a bit friendlier than
// allocating memory with new[]: it won't lead to fragmentation, and the
// memory won't be touched unless needed.
// Note: because pipes don't allow random access, the structure of a zipfile
// created into a pipe is slightly different from that created into a file
// or memory. In particular, the compressed-size of the item cannot be
// stored in the zipfile until after the item itself. (Also, for an item added
// itself via a pipe, the uncompressed-size might not either be known until
// after.) This is not normally a problem. But if you try to unzip via a pipe
// as well, then the unzipper will not know these things about the item until
// after it has been unzipped. Therefore: for unzippers which don't just write
// each item to disk or to a pipe, but instead pre-allocate memory space into
// which to unzip them, then either you have to create the zip not to a pipe,
// or you have to add items not from a pipe, or at least when adding items
// from a pipe you have to specify the length.


///////////////////////////////////////////////////////////////////////////////
//
// ZipAdd()
//
// Purpose:     Add a file to a zip archive
//
// Parameters:  hz      - handle to an open zip archive
//              dstzn   - name used inside the zip archive to identify the file
//              src     - for a file (ZIP_FILENAME) this specifies the filename
//                        to be added to the archive;  for other uses, see below
//              len     - for memory (ZIP_MEMORY) this specifies the buffer 
//                        length;  for other uses, this should be 0
//              flags   - indicates usage, see below;  for files, this will be
//                        ZIP_FILENAME