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/* 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
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