xunzip.h

压缩/解压缩类源码

// XUnzip.h  Version 1.1
//
// 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]
//
// Version 1.1:  - Added Unicode support to CreateZip() and ZipAdd()
//               - Changed file names to avoid conflicts with Lucian's files
//
///////////////////////////////////////////////////////////////////////////////
//
// 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 XUNZIP_H
#define XUNZIP_H


#ifndef XZIP_H
DECLARE_HANDLE(HZIP);	// An HZIP identifies a zip file that has been opened
#endif

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

#define ZIP_HANDLE   1
#define ZIP_FILENAME 2
#define ZIP_MEMORY   3

typedef struct
{ int index;                 // index of this file within the zip
  char name[MAX_PATH];       // filename within the zip
  DWORD attr;                // attributes, as in GetFileAttributes.
  FILETIME atime,ctime,mtime;// access, create, modify filetimes
  long comp_size;            // sizes of item, compressed and uncompressed. These
  long unc_size;             // may be -1 if not yet known (e.g. being streamed in)
} ZIPENTRY;

typedef struct
{ int index;                 // index of this file within the zip
  TCHAR name[MAX_PATH];      // filename within the zip
  DWORD attr;                // attributes, as in GetFileAttributes.
  FILETIME atime,ctime,mtime;// access, create, modify filetimes
  long comp_size;            // sizes of item, compressed and uncompressed. These
  long unc_size;             // may be -1 if not yet known (e.g. being streamed in)
} ZIPENTRYW;


///////////////////////////////////////////////////////////////////////////////
//
// OpenZip()
//
// Purpose:     Open an existing 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 opened ok, otherwise 0
//
HZIP OpenZip(void *z, unsigned int len, DWORD flags);
// OpenZip - opens a zip file and returns a handle with which you can
// subsequently examine its contents. You can open a zip file from:
// from a pipe:             OpenZip(hpipe_read,0, ZIP_HANDLE);
// from a file (by handle): OpenZip(hfile,0,      ZIP_HANDLE);
// from a file (by name):   OpenZip("c:\\test.zip",0, ZIP_FILENAME);
// from a memory block:     OpenZip(bufstart, buflen, ZIP_MEMORY);
// If the file is opened through a pipe, then items may only be
// accessed in increasing order, and an item may only be unzipped once,
// although GetZipItem can be called immediately before and after unzipping
// it. If it's opened i	n any other way, then full random access is possible.
// Note: pipe input is not yet implemented.


///////////////////////////////////////////////////////////////////////////////
//
// GetZipItem()
//
// Purpose:     Get information about an item in an open zip archive
//
// Parameters:  hz      - handle of open zip archive
//              index   - index number (0 based) of item in zip 
//              ze      - pointer to a ZIPENTRY (if ANSI) or ZIPENTRYW struct
//                        (if Unicode)
//
// Returns:     ZRESULT - ZR_OK if success, otherwise some other value
//

#ifdef _UNICODE
#define GetZipItem GetZipItemW
#else
#define GetZipItem GetZipItemA
#endif

ZRESULT GetZipItemA(HZIP hz, int index, ZIPENTRY *ze);
ZRESULT GetZipItemW(HZIP hz, int index, ZIPENTRYW *ze);
// GetZipItem - call this to get information about an item in the zip.
// If index is -1 and the file wasn't opened through a pipe,
// then it returns information about the whole zipfile
// (and in particular ze.index returns the number of index items).
// Note: the item might be a directory (ze.attr & FILE_ATTRIBUTE_DIRECTORY)
// See below for notes on what happens when you unzip such an item.
// Note: if you are opening the zip through a pipe, then random access
// is not possible and GetZipItem(-1) fails and you can't discover the number
// of items except by calling GetZipItem on each one of them in turn,
// starting at 0, until eventually the call fails. Also, in the event that
// you are opening through a pipe and the zip was itself created into a pipe,
// then then comp_size and sometimes unc_size as well may not be known until
// after the item has been unzipped.


///////////////////////////////////////////////////////////////////////////////
//
// FindZipItem()
//
// Purpose:     Find item by name and return information about it