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zip_p.h
1 /****************************************************************************
2 ** Filename: zip_p.h
3 ** Last updated [dd/mm/yyyy]: 27/03/2011
4 **
5 ** pkzip 2.0 file compression.
6 **
7 ** Some of the code has been inspired by other open source projects,
8 ** (mainly Info-Zip and Gilles Vollant's minizip).
9 ** Compression and decompression actually uses the zlib library.
10 **
11 ** Copyright (C) 2007-2011 Angius Fabrizio. All rights reserved.
12 **
13 ** This file is part of the OSDaB project (http://osdab.42cows.org/).
14 **
15 ** This file may be distributed and/or modified under the terms of the
16 ** GNU General Public License version 2 as published by the Free Software
17 ** Foundation and appearing in the file LICENSE.GPL included in the
18 ** packaging of this file.
19 **
20 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
21 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22 **
23 ** See the file LICENSE.GPL that came with this software distribution or
24 ** visit http://www.gnu.org/copyleft/gpl.html for GPL licensing information.
25 **
26 **********************************************************************/
27 
28 //
29 // W A R N I N G
30 // -------------
31 //
32 // This file is not part of the Zip/UnZip API. It exists purely as an
33 // implementation detail. This header file may change from version to
34 // version without notice, or even be removed.
35 //
36 // We mean it.
37 //
38 
39 #ifndef OSDAB_ZIP_P__H
40 #define OSDAB_ZIP_P__H
41 
42 #include "zip.h"
43 #include "zipentry_p.h"
44 
45 #include <QtCore/QFileInfo>
46 #include <QtCore/QObject>
47 #include <QtCore/QtGlobal>
48 
53 #define ZIP_READ_BUFFER (256*1024)
54 
55 OSDAB_BEGIN_NAMESPACE(Zip)
56 
57 class ZipPrivate : public QObject
58 {
59  Q_OBJECT
60 
61 public:
62  ZipPrivate();
63  virtual ~ZipPrivate();
64 
65  QMap<QString,ZipEntryP*>* headers;
66 
67  QIODevice* device;
68  QFile* file;
69 
70  char buffer1[ZIP_READ_BUFFER];
71  char buffer2[ZIP_READ_BUFFER];
72 
73  unsigned char* uBuffer;
74 
75  const quint32* crcTable;
76 
77  QString comment;
78  QString password;
79 
80  Zip::ErrorCode createArchive(QIODevice* device);
81  Zip::ErrorCode closeArchive();
82  void reset();
83 
84  bool zLibInit();
85 
86  Zip::ErrorCode createEntry(const QFileInfo& file, const QString& root, Zip::CompressionLevel level);
87  Zip::CompressionLevel detectCompressionByMime(const QString& ext);
88 
89  inline void encryptBytes(quint32* keys, char* buffer, qint64 read);
90 
91  inline void setULong(quint32 v, char* buffer, unsigned int offset);
92  inline void updateKeys(quint32* keys, int c) const;
93  inline void initKeys(quint32* keys) const;
94  inline int decryptByte(quint32 key2) const;
95 
96  inline QString extractRoot(const QString& p);
97 
98 private slots:
99  void deviceDestroyed(QObject*);
100 
101 private:
102  Zip::ErrorCode do_closeArchive();
103  Zip::ErrorCode writeEntry(const QString& fileName, const ZipEntryP* h, quint32& szCentralDir);
104  Zip::ErrorCode writeCentralDir(quint32 offCentralDir, quint32 szCentralDir);
105 };
106 
107 OSDAB_END_NAMESPACE
108 
109 #endif // OSDAB_ZIP_P__H