#ifndef QUA_ZIP_H
#define QUA_ZIP_H
/*
Copyright (C) 2005-2011 Sergey A. Tachenov
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
See COPYING file for the full LGPL text.
Original ZIP package is copyrighted by Gilles Vollant, see
quazip/(un)zip.h files for details, basically it's zlib license.
**/
#include <QString>
#include <QTextCodec>
#include "zip.h"
#include "unzip.h"
#include "quazip_global.h"
#include "quazipfileinfo.h"
// just in case it will be defined in the later versions of the ZIP/UNZIP
#ifndef UNZ_OPENERROR
// define additional error code
#define UNZ_OPENERROR -1000
#endif
class QuaZipPrivate;
/// ZIP archive.
/** \class QuaZip quazip.h <quazip/quazip.h>
* This class implements basic interface to the ZIP archive. It can be
* used to read table contents of the ZIP archive and retreiving
* information about the files inside it.
*
* You can also use this class to open files inside archive by passing
* pointer to the instance of this class to the constructor of the
* QuaZipFile class. But see QuaZipFile::QuaZipFile(QuaZip*, QObject*)
* for the possible pitfalls.
*
* This class is indended to provide interface to the ZIP subpackage of
* the ZIP/UNZIP package as well as to the UNZIP subpackage. But
* currently it supports only UNZIP.
*
* The use of this class is simple - just create instance using
* constructor, then set ZIP archive file name using setFile() function
* (if you did not passed the name to the constructor), then open() and
* then use different functions to work with it! Well, if you are
* paranoid, you may also wish to call close before destructing the
* instance, to check for errors on close.
*
* You may also use getUnzFile() and getZipFile() functions to get the
* ZIP archive handle and use it with ZIP/UNZIP package API directly.
*
* This class supports localized file names inside ZIP archive, but you
* have to set up proper codec with setCodec() function. By default,
* locale codec will be used, which is probably ok for UNIX systems, but
* will almost certainly fail with ZIP archives created in Windows. This
* is because Windows ZIP programs have strange habit of using DOS
* encoding for file names in ZIP archives. For example, ZIP archive
* with cyrillic names created in Windows will have file names in \c
* IBM866 encoding instead of \c WINDOWS-1251. I think that calling one
* function is not much trouble, but for true platform independency it
* would be nice to have some mechanism for file name encoding auto
* detection using locale information. Does anyone know a good way to do
* it?
**/
class QUAZIP_EXPORT QuaZip {
friend class QuaZipPrivate;
public:
/// Useful constants.
enum Constants {
MAX_FILE_NAME_LENGTH=256 /**< Maximum file name length. Taken from
\c UNZ_MAXFILENAMEINZIP constant in
unzip.c. */
};
/// Open mode of the ZIP file.
enum Mode {
mdNotOpen, ///< ZIP file is not open. This is the initial mode.
mdUnzip, ///< ZIP file is open for reading files inside it.
mdCreate, ///< ZIP file was created with open() call.
mdAppend, /**< ZIP file was opened in append mode. This refers to
* \c APPEND_STATUS_CREATEAFTER mode in ZIP/UNZIP package
* and means that zip is appended to some existing file
* what is useful when that file contains
* self-extractor code. This is obviously \em not what
* you whant to use to add files to the existing ZIP
* archive.
**/
mdAdd ///< ZIP file was opened for adding files in the archive.
};
/// Case sensitivity for the file names.
/** This is what you specify when accessing files in the archive.
* Works perfectly fine with any characters thanks to Qt's great
* unicode support. This is different from ZIP/UNZIP API, where
* only US-ASCII characters was supported.
**/
enum CaseSensitivity {
csDefault=0, ///< Default for platform. Case sensitive for UNIX, not for Windows.
csSensitive=1, ///< Case sensitive.
csInsensitive=2 ///< Case insensitive.
};
private:
QuaZipPrivate *p;
// not (and will not be) implemented
QuaZip(const QuaZip& that);
// not (and will not be) implemented
QuaZip& operator=(const QuaZip& that);
public:
/// Constructs QuaZip object.
/** Call setName() before opening constructed object. */
QuaZip();
/// Constructs QuaZip object associated with ZIP file \a zipName.
QuaZip(const QString& zipName);
/// Constructs QuaZip object associated with ZIP file represented by \a ioDevice.
/** The IO device must be seekable, otherwise an error will occur when opening. */
QuaZip(QIODevice *ioDevice);
/// Destroys QuaZip object.
/** Calls close() if necessary. */
~QuaZip();
/// Opens ZIP file.
/**
* Argument \a mode specifies open mode of the ZIP archive. See Mode
* for details. Note that there is zipOpen2() function in the
* ZIP/UNZIP API which accepts \a globalcomment argument, but it
* does not use it anywhere, so this open() function does not have this
* argument. See setComment() if you need to set global comment.
*
* If the ZIP file is accessed via explicitly set QIODevice, then
* this device is opened in the necessary mode. If the device was
* already opened by some other means, then the behaviour is defined by
* the device implementation, but generally it is not a very good
* idea. For example, QFile will at least issue a warning.
*
* \return \c true if successful, \c false otherwise.
*
* \note ZIP/UNZIP API open calls do not return error code - they
* just return \c NULL indicating an error. But to make things
* easier, quazip.h header defines additional error code \c
* UNZ_ERROROPEN and getZipError() will return it if the open call
* of the ZIP/UNZIP API returns \c NULL.
*
* Argument \a ioApi specifies IO function set for ZIP/UNZIP
* package to use. See unzip.h, zip.h and ioapi.h for details. Note
* that IO API for QuaZip is different from the original package.
* The file path argument was changed to be of type \c voidpf, and
* QuaZip passes a QIODevice pointer there. This QIODevice is either
* set explicitly via setIoDevice() or the QuaZip(QIODevice*)
* constructor, or it is created internally when opening the archive
* by its file name. The default API (qioapi.cpp) just delegates
* everything to the QIODevice API. Not only this allows to use a
* QIODevice instead of file name, but also has a nice side effect
* of raising the file size limit from 2G to 4G.
*
* In short: just forget about the \a ioApi argument and you'll be
* fine.
**/
bool open(Mode mode, zlib_filefunc_def *ioApi =NULL);
/// Closes ZIP file.
/** Call getZipError() to determine if the close was successful. The
* underlying QIODevice is also closed, regardless of whether it was
* set explicitly or not. */
void close();
/// Sets the codec used to encode/decode file names inside archive.
/** This is necessary to access files in the ZIP archive created
* under Windows with non-latin characters in file names. For
* example, file names with cyrillic letters will be in \c IBM866
* encoding.
**/
void setFileNameCodec(QTextCodec *fileNameCodec);
/// Sets the codec used to encode/decode file names inside archive.
/** \overload
* Equivalent to calling setFileNameCodec(QTextCodec::codecForName(codecName));
**/
void setFileNameCodec(const char *fileNameCodecName);
/// Returns the codec used to encode/decode comments inside archive.
QTextCodec* getFileNameCodec() const;
/// Sets the codec used to encode/decode comments inside archive.
/** This codec defaults to locale codec, which is probably ok.
**/
void setCommentCodec(QTextCodec *commentCodec);
/// Sets the codec used to encode/decode comments inside archive.
/** \overload
* Equivalent to calling setCommentCodec(QTextCodec::codecForName(codecName));
**/
void setCommentCodec(const char *commentCodecName);
/// Returns the codec used to encode/decode comments inside archive.
QTextCodec* getCommentCodec() const;
/// Returns the name of the ZIP file.
/** Returns null string if no ZIP file name has been set, for
* example when the QuaZip instance is set up to use a QIODevice
* instead.
* \sa setZipName(), setIoDevice(), getIoDevice()
**/
QString getZipName() const;
/// Sets the name of the ZIP file.
/** Does nothing if the ZIP file is open.
*
* Does not reset error code returned by getZipError().
* \sa setIoDevice(), getIoDevice(), getZipName()
**/
void setZipName(const QString& zipName);
/// Returns the device representing this ZIP file.
/** Returns null string if no device has been set explicitly, for
* example when opening a ZIP file by name.
* \sa setIoDevice(), getZipName(), setZipName()
**/
QIODevice *getIoDevice() const;
/// Sets the device representing the ZIP file.
/** Does nothing if the ZIP file is open.
*
* Does not reset error code returned by getZipError().
* \sa getIoDevice(), getZipName(), setZipName()
**/
void setIoDevice(QIODevice *ioDevice);
/// Returns the mode in which ZIP file was opened.
Mode getMode() const;
/// Returns \c true if ZIP file is open, \c false otherwise.
bool isOpen() const;
/// Returns the error code of the last operation.
/** Returns \c UNZ_OK if the last operation was successful.
*
* Error code resets to \c UNZ_OK every time you call any function
* that accesses something inside ZIP archive, even if it is \c
* const (like getEntriesCount()). open() and close() calls reset
* error code too. See documentation for the specific functions for
* details on error detection.
**/
int getZipError() const;
/// Returns number of the entries in the ZIP central directory.
/** Returns negative error code in the case of error. The same error
* code will be returned by subsequent getZipError() call.
**/
int getEntriesCount() const;
/// Returns global comment in the ZIP file.
QString getComment() const;
/// Sets global comment in the ZIP file.
/** Comment will be written to the archive on close operation.
*
* \sa open()
**/
void setComment(const QString& comment);
/// Sets the current file to the first file in the archive.
/** Returns \c true on success, \c false otherwise. Call
* getZipError() to get the error code.
**/
bool goToFirstFile();
/// Sets the current file to the next file in the archive.
/** Returns \c true on success, \c false otherwise. Call
* getZipError() to determine if there was an error.
*
* Should be used only in QuaZip::mdUnzip mode.
*
* \note If the end of file was reached, getZipError() will return
* \c UNZ_OK instead of \c UNZ_END_OF_LIST_OF_FILE. This is to make
* things like this easier:
* \code
* for(bool more=zip.goToFirstFile(); more; more=zip.goToNextFile()) {
* // do something
* }
* if(zip.getZipError()==UNZ_OK) {
* // ok, there was no error
* }
* \endcode
**/
bool goToNextFile();
/// Sets current file by its name.
/** Returns \c true if successful, \c false otherwise. Argument \a
* cs specifies case sensitivity of the file name. Call
* getZipError() in the case of a failure to get error code.
*
* This is not a wrapper to unzLocateFile() function. That is
* because I had to implement locale-specific case-insensitive
* comparison.
*
* Here are the differences from the original implementation:
*
* - If the file was not found, error code is \c UNZ_OK, not \c
* UNZ_END_OF_LIST_OF_FILE (see also goToNextFile()).
* - If this function fails, it unsets the current file rather than
* resetting it back to what it was before the call.
*
* If \a fileName is null string then this function unsets the
* current file and return \c true. Note that you should close the
* file first if it is open! See
* QuaZipFile::QuaZipFile(QuaZip*,QObject*) for the details.
*
* Should be used only in QuaZip::mdUnzip mode.
*
* \sa setFileNameCodec(), CaseSensitivity
**/
bool setCurrentFile(const QString& fileName, CaseSensitivity cs =csDefault);
/// Returns \c true if the current file has been set.
bool hasCurrentFile() const;
/// Retrieves information about the current file.
/** Fills the structure pointed by \a info. Returns \c true on
* success, \c false otherwise. In the latter case structure pointed
* by \a info remains untouched. If there was an error,
* getZipError() returns error code.
*
* Should be used only in QuaZip::mdUnzip mode.
*
* Does nothing and returns \c false in any of the following cases.
* - ZIP is not open;
* - ZIP does not have current file;
* - \a info is \c NULL;
*
* In all these cases getZipError() returns \c UNZ_OK since there
* is no ZIP/UNZIP API call.
**/
bool getCurrentFileInfo(QuaZipFileInfo* info)const;
/// Returns the current file name.
/** Equivalent to calling getCurrentFileInfo() and then getting \c
* name field of the QuaZipFileInfo structure, but faster and more
* convenient.
*
* Should be used only in QuaZip::mdUnzip mode.
**/
QString getCurrentFileName()const;
/// Returns \c unzFile handle.
/** You can use this handle to directly call UNZIP part of the
* ZIP/UNZIP package functions (see unzip.h).
*
* \warning When using the handle returned by this function, please
* keep in mind that QuaZip class is unable to detect any changes
* you make in the ZIP file state (e. g. changing current file, or
* closing the handle). So please do not do anything with this
* handle that is possible to do with the functions of this class.
* Or at least return the handle in the original state before
* calling some another function of this class (including implicit
* destructor calls and calls from the QuaZipFile objects that refer
* to this QuaZip instance!). So if you have changed the current
* file in the ZIP archive - then change it back or you may
* experience some strange behavior or even crashes.
**/
unzFile getUnzFile();
/// Returns \c zipFile handle.
/** You can use this handle to directly call ZIP part of the
* ZIP/UNZIP package functions (see zip.h). Warnings about the
* getUnzFile() function also apply to this function.
**/
zipFile getZipFile();
};
#endif