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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef _7ZIP_ARCHIVE_H
#define _7ZIP_ARCHIVE_H
extern "C" {
#include "lib/7z/7zFile.h"
#include "lib/7z/7z.h"
}
#include "ArchiveFactory.h"
#include "BufferedArchive.h"
#include <vector>
#include <string>
#include "IArchive.h"
/**
* Creates LZMA/7zip compressed, single-file archives.
* @see CSevenZipArchive
*/
class CSevenZipArchiveFactory : public IArchiveFactory {
public:
CSevenZipArchiveFactory();
bool CheckForSolid() const { return true; }
private:
IArchive* DoCreateArchive(const std::string& filePath) const;
};
/**
* An LZMA/7zip compressed, single-file archive.
*/
class CSevenZipArchive : public CBufferedArchive
{
public:
CSevenZipArchive(const std::string& name);
virtual ~CSevenZipArchive();
virtual bool IsOpen();
virtual unsigned int NumFiles() const;
virtual bool GetFileImpl(unsigned int fid, std::vector<std::uint8_t>& buffer);
virtual void FileInfo(unsigned int fid, std::string& name, int& size) const;
virtual bool HasLowReadingCost(unsigned int fid) const;
virtual unsigned GetCrc32(unsigned int fid);
private:
UInt32 blockIndex;
Byte* outBuffer;
size_t outBufferSize;
/**
* How much more unpacked data may be allowed in a solid block,
* besides a meta-file.
* @see FileData#size
* @see FileData#unpackedSize
*/
static const size_t COST_LIMIT_UNPACK_OVERSIZE;
/**
* Maximum allowed packed data allowed in a solid block
* that contains a meta-file.
* This is only checked for if the unpack-oversize limit was not met.
* @see FileData#size
* @see FileData#unpackedSize
*/
static const size_t COST_LIMIT_DISC_READ;
struct FileData
{
int fp;
/**
* Real/unpacked size of the file in bytes.
* @see #unpackedSize
* @see #packedSize
*/
int size;
std::string origName;
unsigned int crc;
/**
* How many bytes of files have to be unpacked to get to this file.
* This either equal to size, or is larger, if there are other files
* in the same solid block.
* @see #size
* @see #packedSize
*/
int unpackedSize;
/**
* How many bytes of the archive have to be read
* from disc to get to this file.
* This may be smaller or larger then size,
* and is smaller then or equal to unpackedSize.
* @see #size
* @see #unpackedSize
*/
int packedSize;
};
int GetFileName(const CSzArEx* db, int i);
std::vector<FileData> fileData;
UInt16 *tempBuf;
size_t tempBufSize;
CFileInStream archiveStream;
CSzArEx db;
CLookToRead lookStream;
ISzAlloc allocImp;
ISzAlloc allocTempImp;
bool isOpen;
};
#endif // _7ZIP_ARCHIVE_H
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