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343 lines
16 KiB
C
343 lines
16 KiB
C
// XZip.h Version 1.1
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//
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// Authors: Mark Adler et al. (see below)
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//
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// Modified by: Lucian Wischik
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// lu@wischik.com
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//
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// Version 1.0 - Turned C files into just a single CPP file
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// - Made them compile cleanly as C++ files
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// - Gave them simpler APIs
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// - Added the ability to zip/unzip directly in memory without
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// any intermediate files
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//
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// Modified by: Hans Dietrich
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// hdietrich2@hotmail.com
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//
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// Version 1.1: - Added Unicode support to CreateZip() and ZipAdd()
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// - Changed file names to avoid conflicts with Lucian's files
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//
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///////////////////////////////////////////////////////////////////////////////
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//
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// Lucian Wischik's comments:
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// --------------------------
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// THIS FILE is almost entirely based upon code by info-zip.
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// It has been modified by Lucian Wischik.
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// The original code may be found at http://www.info-zip.org
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// The original copyright text follows.
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//
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///////////////////////////////////////////////////////////////////////////////
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//
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// Original authors' comments:
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// ---------------------------
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// This is version 2002-Feb-16 of the Info-ZIP copyright and license. The
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// definitive version of this document should be available at
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// ftp://ftp.info-zip.org/pub/infozip/license.html indefinitely.
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//
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// Copyright (c) 1990-2002 Info-ZIP. All rights reserved.
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//
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// For the purposes of this copyright and license, "Info-ZIP" is defined as
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// the following set of individuals:
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//
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// Mark Adler, John Bush, Karl Davis, Harald Denker, Jean-Michel Dubois,
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// Jean-loup Gailly, Hunter Goatley, Ian Gorman, Chris Herborth, Dirk Haase,
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// Greg Hartwig, Robert Heath, Jonathan Hudson, Paul Kienitz,
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// David Kirschbaum, Johnny Lee, Onno van der Linden, Igor Mandrichenko,
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// Steve P. Miller, Sergio Monesi, Keith Owens, George Petrov, Greg Roelofs,
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// Kai Uwe Rommel, Steve Salisbury, Dave Smith, Christian Spieler,
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// Antoine Verheijen, Paul von Behren, Rich Wales, Mike White
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//
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// This software is provided "as is", without warranty of any kind, express
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// or implied. In no event shall Info-ZIP or its contributors be held liable
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// for any direct, indirect, incidental, special or consequential damages
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// arising out of the use of or inability to use this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. Redistributions of source code must retain the above copyright notice,
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// definition, disclaimer, and this list of conditions.
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//
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// 2. Redistributions in binary form (compiled executables) must reproduce
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// the above copyright notice, definition, disclaimer, and this list of
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// conditions in documentation and/or other materials provided with the
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// distribution. The sole exception to this condition is redistribution
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// of a standard UnZipSFX binary as part of a self-extracting archive;
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// that is permitted without inclusion of this license, as long as the
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// normal UnZipSFX banner has not been removed from the binary or disabled.
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//
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// 3. Altered versions--including, but not limited to, ports to new
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// operating systems, existing ports with new graphical interfaces, and
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// dynamic, shared, or static library versions--must be plainly marked
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// as such and must not be misrepresented as being the original source.
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// Such altered versions also must not be misrepresented as being
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// Info-ZIP releases--including, but not limited to, labeling of the
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// altered versions with the names "Info-ZIP" (or any variation thereof,
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// including, but not limited to, different capitalizations),
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// "Pocket UnZip", "WiZ" or "MacZip" without the explicit permission of
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// Info-ZIP. Such altered versions are further prohibited from
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// misrepresentative use of the Zip-Bugs or Info-ZIP e-mail addresses or
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// of the Info-ZIP URL(s).
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//
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// 4. Info-ZIP retains the right to use the names "Info-ZIP", "Zip", "UnZip",
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// "UnZipSFX", "WiZ", "Pocket UnZip", "Pocket Zip", and "MacZip" for its
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// own source and binary releases.
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//
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///////////////////////////////////////////////////////////////////////////////
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#ifndef XZIP_H
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#define XZIP_H
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// ZIP functions -- for creating zip files
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// This file is a repackaged form of the Info-Zip source code available
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// at www.info-zip.org. The original copyright notice may be found in
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// zip.cpp. The repackaging was done by Lucian Wischik to simplify its
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// use in Windows/C++.
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#if !defined( DWORD )
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#ifdef _WIN32
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typedef unsigned long DWORD;
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#else
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typedef unsigned int DWORD;
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#endif
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#endif
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#if !defined( TCHAR )
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typedef char TCHAR;
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#endif
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#ifndef XUNZIP_H
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#if !defined(DECLARE_HANDLE)
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#if !defined(HANDLE)
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typedef void * HANDLE;
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#endif
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#define DECLARE_HANDLE(name) typedef struct name##__ { int unused; } *name
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#endif
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DECLARE_HANDLE(HZIP); // An HZIP identifies a zip file that is being created
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#endif
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typedef DWORD ZRESULT; // result codes from any of the zip functions. Listed later.
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// flag values passed to some functions
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#define ZIP_HANDLE 1
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#define ZIP_FILENAME 2
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#define ZIP_MEMORY 3
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#define ZIP_FOLDER 4
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///////////////////////////////////////////////////////////////////////////////
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//
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// CreateZip()
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//
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// Purpose: Create a zip archive file
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//
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// Parameters: z - archive file name if flags is ZIP_FILENAME; for other
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// uses see below
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// len - for memory (ZIP_MEMORY) should be the buffer size;
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// for other uses, should be 0
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// flags - indicates usage, see below; for files, this will be
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// ZIP_FILENAME
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//
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// Returns: HZIP - non-zero if zip archive created ok, otherwise 0
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//
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HZIP CreateZip(void *z, unsigned int len, DWORD flags);
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// CreateZip - call this to start the creation of a zip file.
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// As the zip is being created, it will be stored somewhere:
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// to a pipe: CreateZip(hpipe_write, 0,ZIP_HANDLE);
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// in a file (by handle): CreateZip(hfile, 0,ZIP_HANDLE);
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// in a file (by name): CreateZip("c:\\test.zip", 0,ZIP_FILENAME);
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// in memory: CreateZip(buf, len,ZIP_MEMORY);
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// or in pagefile memory: CreateZip(0, len,ZIP_MEMORY);
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// The final case stores it in memory backed by the system paging file,
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// where the zip may not exceed len bytes. This is a bit friendlier than
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// allocating memory with new[]: it won't lead to fragmentation, and the
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// memory won't be touched unless needed.
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// Note: because pipes don't allow random access, the structure of a zipfile
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// created into a pipe is slightly different from that created into a file
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// or memory. In particular, the compressed-size of the item cannot be
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// stored in the zipfile until after the item itself. (Also, for an item added
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// itself via a pipe, the uncompressed-size might not either be known until
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// after.) This is not normally a problem. But if you try to unzip via a pipe
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// as well, then the unzipper will not know these things about the item until
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// after it has been unzipped. Therefore: for unzippers which don't just write
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// each item to disk or to a pipe, but instead pre-allocate memory space into
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// which to unzip them, then either you have to create the zip not to a pipe,
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// or you have to add items not from a pipe, or at least when adding items
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// from a pipe you have to specify the length.
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///////////////////////////////////////////////////////////////////////////////
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//
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// ZipAdd()
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//
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// Purpose: Add a file to a zip archive
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//
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// Parameters: hz - handle to an open zip archive
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// dstzn - name used inside the zip archive to identify the file
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// src - for a file (ZIP_FILENAME) this specifies the filename
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// to be added to the archive; for other uses, see below
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// len - for memory (ZIP_MEMORY) this specifies the buffer
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// length; for other uses, this should be 0
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// flags - indicates usage, see below; for files, this will be
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// ZIP_FILENAME
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//
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// Returns: ZRESULT - ZR_OK if success, otherwise some other value
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//
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ZRESULT ZipAdd(HZIP hz, const TCHAR *dstzn, void *src, unsigned int len, DWORD flags);
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// ZipAdd - call this for each file to be added to the zip.
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// dstzn is the name that the file will be stored as in the zip file.
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// The file to be added to the zip can come
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// from a pipe: ZipAdd(hz,"file.dat", hpipe_read,0,ZIP_HANDLE);
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// from a file: ZipAdd(hz,"file.dat", hfile,0,ZIP_HANDLE);
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// from a fname: ZipAdd(hz,"file.dat", "c:\\docs\\origfile.dat",0,ZIP_FILENAME);
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// from memory: ZipAdd(hz,"subdir\\file.dat", buf,len,ZIP_MEMORY);
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// (folder): ZipAdd(hz,"subdir", 0,0,ZIP_FOLDER);
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// Note: if adding an item from a pipe, and if also creating the zip file itself
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// to a pipe, then you might wish to pass a non-zero length to the ZipAdd
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// function. This will let the zipfile store the items size ahead of the
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// compressed item itself, which in turn makes it easier when unzipping the
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// zipfile into a pipe.
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///////////////////////////////////////////////////////////////////////////////
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//
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// CloseZip()
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//
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// Purpose: Close an open zip archive
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//
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// Parameters: hz - handle to an open zip archive
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//
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// Returns: ZRESULT - ZR_OK if success, otherwise some other value
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//
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ZRESULT CloseZip(HZIP hz);
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// CloseZip - the zip handle must be closed with this function.
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ZRESULT ZipGetMemory(HZIP hz, void **buf, unsigned long *len);
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// ZipGetMemory - If the zip was created in memory, via ZipCreate(0,ZIP_MEMORY),
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// then this function will return information about that memory block.
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// buf will receive a pointer to its start, and len its length.
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// Note: you can't add any more after calling this.
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unsigned int FormatZipMessage(ZRESULT code, char *buf,unsigned int len);
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// FormatZipMessage - given an error code, formats it as a string.
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// It returns the length of the error message. If buf/len points
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// to a real buffer, then it also writes as much as possible into there.
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// These are the result codes:
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#define ZR_OK 0x00000000 // nb. the pseudo-code zr-recent is never returned,
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#define ZR_RECENT 0x00000001 // but can be passed to FormatZipMessage.
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// The following come from general system stuff (e.g. files not openable)
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#define ZR_GENMASK 0x0000FF00
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#define ZR_NODUPH 0x00000100 // couldn't duplicate the handle
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#define ZR_NOFILE 0x00000200 // couldn't create/open the file
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#define ZR_NOALLOC 0x00000300 // failed to allocate some resource
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#define ZR_WRITE 0x00000400 // a general error writing to the file
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#define ZR_NOTFOUND 0x00000500 // couldn't find that file in the zip
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#define ZR_MORE 0x00000600 // there's still more data to be unzipped
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#define ZR_CORRUPT 0x00000700 // the zipfile is corrupt or not a zipfile
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#define ZR_READ 0x00000800 // a general error reading the file
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// The following come from mistakes on the part of the caller
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#define ZR_CALLERMASK 0x00FF0000
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#define ZR_ARGS 0x00010000 // general mistake with the arguments
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#define ZR_NOTMMAP 0x00020000 // tried to ZipGetMemory, but that only works on mmap zipfiles, which yours wasn't
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#define ZR_MEMSIZE 0x00030000 // the memory size is too small
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#define ZR_FAILED 0x00040000 // the thing was already failed when you called this function
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#define ZR_ENDED 0x00050000 // the zip creation has already been closed
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#define ZR_MISSIZE 0x00060000 // the indicated input file size turned out mistaken
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#define ZR_PARTIALUNZ 0x00070000 // the file had already been partially unzipped
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#define ZR_ZMODE 0x00080000 // tried to mix creating/opening a zip
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// The following come from bugs within the zip library itself
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#define ZR_BUGMASK 0xFF000000
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#define ZR_NOTINITED 0x01000000 // initialisation didn't work
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#define ZR_SEEK 0x02000000 // trying to seek in an unseekable file
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#define ZR_NOCHANGE 0x04000000 // changed its mind on storage, but not allowed
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#define ZR_FLATE 0x05000000 // an internal error in the de/inflation code
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// e.g.
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//
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// (1) Traditional use, creating a zipfile from existing files
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// HZIP hz = CreateZip("c:\\temp.zip",0,ZIP_FILENAME);
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// ZipAdd(hz,"src1.txt", "c:\\src1.txt",0,ZIP_FILENAME);
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// ZipAdd(hz,"src2.bmp", "c:\\src2_origfn.bmp",0,ZIP_FILENAME);
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// CloseZip(hz);
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//
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// (2) Memory use, creating an auto-allocated mem-based zip file from various sources
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// HZIP hz = CreateZip(0,100000,ZIP_MEMORY);
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// // adding a conventional file...
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// ZipAdd(hz,"src1.txt", "c:\\src1.txt",0,ZIP_FILENAME);
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// // adding something from memory...
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// char buf[1000]; for (int i=0; i<1000; i++) buf[i]=(char)(i&0x7F);
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// ZipAdd(hz,"file.dat", buf,1000,ZIP_MEMORY);
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// // adding something from a pipe...
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// HANDLE hread,hwrite; CreatePipe(&hread,&write,NULL,0);
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// HANDLE hthread = CreateThread(ThreadFunc,(void*)hwrite);
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// ZipAdd(hz,"unz3.dat", hread,0,ZIP_HANDLE);
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// WaitForSingleObject(hthread,INFINITE);
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// CloseHandle(hthread); CloseHandle(hread);
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// ... meanwhile DWORD CALLBACK ThreadFunc(void *dat)
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// { HANDLE hwrite = (HANDLE)dat;
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// char buf[1000]={17};
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// DWORD writ; WriteFile(hwrite,buf,1000,&writ,NULL);
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// CloseHandle(hwrite);
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// return 0;
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// }
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// // and now that the zip is created, let's do something with it:
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// void *zbuf; unsigned long zlen; ZipGetMemory(hz,&zbuf,&zlen);
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// HANDLE hfz = CreateFile("test2.zip",GENERIC_WRITE,CREATE_ALWAYS);
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// DWORD writ; WriteFile(hfz,zbuf,zlen,&writ,NULL);
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// CloseHandle(hfz);
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// CloseZip(hz);
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//
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// (3) Handle use, for file handles and pipes
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// HANDLE hzread,hzwrite; CreatePipe(&hzread,&hzwrite);
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// HANDLE hthread = CreateThread(ZipReceiverThread,(void*)hread);
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// HZIP hz = ZipCreate(hzwrite,ZIP_HANDLE);
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// // ... add to it
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// CloseZip(hz);
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// CloseHandle(hzwrite);
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// WaitForSingleObject(hthread,INFINITE);
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// CloseHandle(hthread);
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// ... meanwhile DWORD CALLBACK ThreadFunc(void *dat)
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// { HANDLE hread = (HANDLE)dat;
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// char buf[1000];
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// while (true)
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// { DWORD red; ReadFile(hread,buf,1000,&red,NULL);
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// // ... and do something with this zip data we're receiving
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// if (red==0) break;
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// }
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// CloseHandle(hread);
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// return 0;
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// }
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//
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// Now we indulge in a little skullduggery so that the code works whether
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// the user has included just zip or both zip and unzip.
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// Idea: if header files for both zip and unzip are present, then presumably
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// the cpp files for zip and unzip are both present, so we will call
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// one or the other of them based on a dynamic choice. If the header file
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// for only one is present, then we will bind to that particular one.
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HZIP CreateZipZ(void *z,unsigned int len,DWORD flags);
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ZRESULT CloseZipZ(HZIP hz);
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unsigned int FormatZipMessageZ(ZRESULT code, char *buf,unsigned int len);
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bool IsZipHandleZ(HZIP hz);
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#define CreateZip CreateZipZ
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#ifdef XUNZIP_H
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#undef CloseZip
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#define CloseZip(hz) (IsZipHandleZ(hz)?CloseZipZ(hz):CloseZipU(hz))
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#else
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#define CloseZip CloseZipZ
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#define FormatZipMessage FormatZipMessageZ
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#endif
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#endif //XZIP_H
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