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383 lines
17 KiB
C
383 lines
17 KiB
C
// XUnzip.h Version 1.3
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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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// hdietrich@gmail.com
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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 XUNZIP_H
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#define XUNZIP_H
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#ifndef XZIP_H
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DECLARE_HANDLE(HZIP); // An HZIP identifies a zip file that has been opened
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#endif
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typedef DWORD ZRESULT;
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// return codes from any of the zip functions. Listed later.
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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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typedef struct
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{ int index; // index of this file within the zip
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char name[MAX_PATH]; // filename within the zip
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DWORD attr; // attributes, as in GetFileAttributes.
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FILETIME atime,ctime,mtime;// access, create, modify filetimes
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long comp_size; // sizes of item, compressed and uncompressed. These
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long unc_size; // may be -1 if not yet known (e.g. being streamed in)
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} ZIPENTRY;
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typedef struct
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{ int index; // index of this file within the zip
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TCHAR name[MAX_PATH]; // filename within the zip
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DWORD attr; // attributes, as in GetFileAttributes.
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FILETIME atime,ctime,mtime;// access, create, modify filetimes
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long comp_size; // sizes of item, compressed and uncompressed. These
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long unc_size; // may be -1 if not yet known (e.g. being streamed in)
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} ZIPENTRYW;
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///////////////////////////////////////////////////////////////////////////////
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//
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// OpenZip()
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//
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// Purpose: Open an existing 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 opened ok, otherwise 0
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//
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HZIP OpenZip(void *z, unsigned int len, DWORD flags);
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// OpenZip - opens a zip file and returns a handle with which you can
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// subsequently examine its contents. You can open a zip file from:
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// from a pipe: OpenZip(hpipe_read,0, ZIP_HANDLE);
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// from a file (by handle): OpenZip(hfile,0, ZIP_HANDLE);
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// from a file (by name): OpenZip("c:\\test.zip",0, ZIP_FILENAME);
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// from a memory block: OpenZip(bufstart, buflen, ZIP_MEMORY);
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// If the file is opened through a pipe, then items may only be
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// accessed in increasing order, and an item may only be unzipped once,
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// although GetZipItem can be called immediately before and after unzipping
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// it. If it's opened i n any other way, then full random access is possible.
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// Note: pipe input is not yet implemented.
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///////////////////////////////////////////////////////////////////////////////
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//
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// GetZipItem()
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//
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// Purpose: Get information about an item in an open zip archive
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//
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// Parameters: hz - handle of open zip archive
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// index - index number (0 based) of item in zip
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// ze - pointer to a ZIPENTRY (if ANSI) or ZIPENTRYW struct
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// (if Unicode)
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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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#ifdef _UNICODE
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#define GetZipItem GetZipItemW
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#else
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#define GetZipItem GetZipItemA
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#endif
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ZRESULT GetZipItemA(HZIP hz, int index, ZIPENTRY *ze);
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ZRESULT GetZipItemW(HZIP hz, int index, ZIPENTRYW *ze);
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// GetZipItem - call this to get information about an item in the zip.
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// If index is -1 and the file wasn't opened through a pipe,
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// then it returns information about the whole zipfile
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// (and in particular ze.index returns the number of index items).
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// Note: the item might be a directory (ze.attr & FILE_ATTRIBUTE_DIRECTORY)
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// See below for notes on what happens when you unzip such an item.
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// Note: if you are opening the zip through a pipe, then random access
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// is not possible and GetZipItem(-1) fails and you can't discover the number
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// of items except by calling GetZipItem on each one of them in turn,
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// starting at 0, until eventually the call fails. Also, in the event that
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// you are opening through a pipe and the zip was itself created into a pipe,
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// then then comp_size and sometimes unc_size as well may not be known until
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// after the item has been unzipped.
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///////////////////////////////////////////////////////////////////////////////
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//
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// FindZipItem()
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//
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// Purpose: Find item by name and return information about it
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//
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// Parameters: hz - handle of open zip archive
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// name - name of file to look for inside zip archive
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// ic - TRUE = case insensitive
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// index - pointer to index number returned, or -1
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// ze - pointer to a ZIPENTRY (if ANSI) or ZIPENTRYW struct
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// (if Unicode)
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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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#ifdef _UNICODE
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#define FindZipItem FindZipItemW
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#else
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#define FindZipItem FindZipItemA
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#endif
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ZRESULT FindZipItemA(HZIP hz, const TCHAR *name, bool ic, int *index, ZIPENTRY *ze);
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ZRESULT FindZipItemW(HZIP hz, const TCHAR *name, bool ic, int *index, ZIPENTRYW *ze);
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// FindZipItem - finds an item by name. ic means 'insensitive to case'.
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// It returns the index of the item, and returns information about it.
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// If nothing was found, then index is set to -1 and the function returns
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// an error code.
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///////////////////////////////////////////////////////////////////////////////
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//
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// UnzipItem()
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//
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// Purpose: Find item by index and unzip it
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//
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// Parameters: hz - handle of open zip archive
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// index - index number of file to unzip
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// dst - target file name of unzipped file
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// len - for memory (ZIP_MEMORY. length of buffer;
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// otherwise 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 UnzipItem(HZIP hz, int index, void *dst, unsigned int len, DWORD flags);
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// UnzipItem - given an index to an item, unzips it. You can unzip to:
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// to a pipe: UnzipItem(hz,i, hpipe_write,0,ZIP_HANDLE);
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// to a file (by handle): UnzipItem(hz,i, hfile,0,ZIP_HANDLE);
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// to a file (by name): UnzipItem(hz,i, ze.name,0,ZIP_FILENAME);
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// to a memory block: UnzipItem(hz,i, buf,buflen,ZIP_MEMORY);
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// In the final case, if the buffer isn't large enough to hold it all,
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// then the return code indicates that more is yet to come. If it was
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// large enough, and you want to know precisely how big, GetZipItem.
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// Note: zip files are normally stored with relative pathnames. If you
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// unzip with ZIP_FILENAME a relative pathname then the item gets created
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// relative to the current directory - it first ensures that all necessary
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// subdirectories have been created. Also, the item may itself be a directory.
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// If you unzip a directory with ZIP_FILENAME, then the directory gets created.
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// If you unzip it to a handle or a memory block, then nothing gets created
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// and it emits 0 bytes.
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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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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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// SetCurrentDirectory("c:\\docs\\stuff");
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// HZIP hz = OpenZip("c:\\stuff.zip",0,ZIP_FILENAME);
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// ZIPENTRY ze; GetZipItem(hz,-1,&ze); int numitems=ze.index;
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// for (int i=0; i<numitems; i++)
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// { GetZipItem(hz,i,&ze);
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// UnzipItem(hz,i,ze.name,0,ZIP_FILENAME);
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// }
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// CloseZip(hz);
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//
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//
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// HRSRC hrsrc = FindResource(hInstance,MAKEINTRESOURCE(1),RT_RCDATA);
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// HANDLE hglob = LoadResource(hInstance,hrsrc);
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// void *zipbuf=LockResource(hglob);
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// unsigned int ziplen=SizeofResource(hInstance,hrsrc);
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// HZIP hz = OpenZip(zipbuf, ziplen, ZIP_MEMORY);
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// - unzip to a membuffer -
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// ZIPENTRY ze; int i; FindZipItem(hz,"file.dat",&i,&ze);
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// char *ibuf = new char[ze.unc_size];
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// UnzipItem(hz,i, ibuf, ze.unc_size,ZIP_MEMORY);
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// delete[] buf;
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// - unzip to a fixed membuff -
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// ZIPENTRY ze; int i; FindZipItem(hz,"file.dat",&i,&ze);
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// char ibuf[1024]; ZIPRESULT zr=ZR_MORE; unsigned long totsize=0;
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// while (zr==ZR_MORE)
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// { zr = UnzipItem(hz,i, ibuf,1024,ZIP_MEMORY);
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// unsigned long bufsize=1024; if (zr==ZR_OK) bufsize=ze.unc_size-totsize;
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// totsize+=bufsize;
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// }
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// - unzip to a pipe -
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// HANDLE hthread=CreateWavReaderThread(&hread,&hwrite);
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// FindZipItem(hz,"sound.wav",&i,&ze);
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// UnzipItem(hz,i, hwrite,0,ZIP_HANDLE);
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// CloseHandle(hwrite);
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// WaitForSingleObject(hthread,INFINITE);
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// CloseHandle(hread); CloseHandle(hthread);
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// - finished -
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// CloseZip(hz);
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// // note: no need to free resources obtained through Find/Load/LockResource
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//
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//
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// SetCurrentDirectory("c:\\docs\\pipedzipstuff");
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// HANDLE hread,hwrite; CreatePipe(&hread,&hwrite);
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// CreateZipWriterThread(hwrite);
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// HZIP hz = OpenZip(hread,0,ZIP_HANDLE);
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// for (int i=0; ; i++)
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// { ZIPENTRY ze; ZRESULT res = GetZipItem(hz,i,&ze);
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// if (res!=ZE_OK) break; // no more
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// UnzipItem(hz,i, ze.name,0,ZIP_FILENAME);
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// }
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// CloseZip(hz);
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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 OpenZipU(void *z,unsigned int len,DWORD flags);
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ZRESULT CloseZipU(HZIP hz);
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unsigned int FormatZipMessageU(ZRESULT code, char *buf,unsigned int len);
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bool IsZipHandleU(HZIP hz);
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#define OpenZip OpenZipU
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#ifdef XZIP_H
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#undef CloseZip
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#define CloseZip(hz) (IsZipHandleU(hz)?CloseZipU(hz):CloseZipZ(hz))
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#else
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#define CloseZip CloseZipU
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#define FormatZipMessage FormatZipMessageU
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#endif
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#endif //XUNZIP_H
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