mirror of
https://github.com/xiaoyifang/goldendict-ng.git
synced 2024-11-23 20:14:05 +00:00
79 lines
2.1 KiB
C++
79 lines
2.1 KiB
C++
/* This file is (c) 2008-2012 Konstantin Isakov <ikm@goldendict.org>
|
|
* Part of GoldenDict. Licensed under GPLv3 or later, see the LICENSE file */
|
|
|
|
#ifndef __ZIPFILE_HH_INCLUDED__
|
|
#define __ZIPFILE_HH_INCLUDED__
|
|
|
|
#include <QFile>
|
|
#include <QDateTime>
|
|
#include "splitfile.hh"
|
|
|
|
/// Support for zip files in GoldenDict. Note that the implementation is
|
|
/// strictly tailored to GoldenDict needs only.
|
|
namespace ZipFile {
|
|
|
|
// Support for split zip files
|
|
class SplitZipFile : public SplitFile::SplitFile
|
|
{
|
|
public:
|
|
SplitZipFile()
|
|
{}
|
|
SplitZipFile( const QString & name );
|
|
|
|
virtual void setFileName( const QString & name );
|
|
|
|
// Latest modified time for all parts
|
|
QDateTime lastModified() const;
|
|
|
|
// Calc absolute offset by relative offset in part and part nom
|
|
qint64 calcAbsoluteOffset( qint64 offset, quint16 partNo );
|
|
};
|
|
|
|
enum CompressionMethod
|
|
{
|
|
Uncompressed,
|
|
Deflated,
|
|
Unsupported
|
|
};
|
|
|
|
/// Entry from central dir
|
|
struct CentralDirEntry
|
|
{
|
|
QByteArray fileName;
|
|
|
|
quint32 localHeaderOffset, compressedSize, uncompressedSize;
|
|
CompressionMethod compressionMethod;
|
|
bool fileNameInUTF8;
|
|
};
|
|
|
|
/// Represents contents of the local file header -- that what CentralDirEntry::
|
|
/// localHeaderOffset points at.
|
|
struct LocalFileHeader
|
|
{
|
|
QByteArray fileName;
|
|
|
|
quint32 compressedSize, uncompressedSize;
|
|
CompressionMethod compressionMethod;
|
|
};
|
|
|
|
/// Finds the central directory in the given file and positions it at its
|
|
/// beginning. Returns true if the file is positioned, false otherwise (not a
|
|
/// zip file or other error).
|
|
/// Once the file is positioned, entries may be read by constructing Entry
|
|
/// objects.
|
|
bool positionAtCentralDir( SplitZipFile & );
|
|
|
|
/// Reads entry from the zip at its current offset. The file gets advanced
|
|
/// by the size of entry, so it points to the next entry.
|
|
/// Returns true on success, false otherwise.
|
|
bool readNextEntry( SplitZipFile &, CentralDirEntry & );
|
|
|
|
/// Reads loca file header from the zip at its current offset. The file gets
|
|
/// advanced by the size of entry and starts pointing to file data.
|
|
/// Returns true on success, false otherwise.
|
|
bool readLocalHeader( SplitZipFile &, LocalFileHeader & );
|
|
|
|
}
|
|
|
|
#endif
|