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// 7zIn.h
#ifndef __7Z_IN_H
#define __7Z_IN_H
#include "../../../Common/MyCom.h"
#include "../../IPassword.h"
#include "../../IStream.h"
#include "../../Common/CreateCoder.h"
#include "../../Common/InBuffer.h"
#include "7zItem.h"
namespace NArchive {
namespace N7z {
struct CInArchiveInfo
{
CArchiveVersion Version;
UInt64 StartPosition;
UInt64 StartPositionAfterHeader;
UInt64 DataStartPosition;
UInt64 DataStartPosition2;
CRecordVector<UInt64> FileInfoPopIDs;
void Clear()
{
FileInfoPopIDs.Clear();
}
};
struct CArchiveDatabaseEx: public CArchiveDatabase
{
CInArchiveInfo ArchiveInfo;
CRecordVector<UInt64> PackStreamStartPositions;
CRecordVector<CNum> FolderStartPackStreamIndex;
CRecordVector<CNum> FolderStartFileIndex;
CRecordVector<CNum> FileIndexToFolderIndexMap;
UInt64 HeadersSize;
UInt64 PhySize;
void Clear()
{
CArchiveDatabase::Clear();
ArchiveInfo.Clear();
PackStreamStartPositions.Clear();
FolderStartPackStreamIndex.Clear();
FolderStartFileIndex.Clear();
FileIndexToFolderIndexMap.Clear();
HeadersSize = 0;
PhySize = 0;
}
void FillFolderStartPackStream();
void FillStartPos();
void FillFolderStartFileIndex();
void Fill()
{
FillFolderStartPackStream();
FillStartPos();
FillFolderStartFileIndex();
}
UInt64 GetFolderStreamPos(int folderIndex, int indexInFolder) const
{
return ArchiveInfo.DataStartPosition +
PackStreamStartPositions[FolderStartPackStreamIndex[folderIndex] + indexInFolder];
}
UInt64 GetFolderFullPackSize(int folderIndex) const
{
CNum packStreamIndex = FolderStartPackStreamIndex[folderIndex];
const CFolder &folder = Folders[folderIndex];
UInt64 size = 0;
for (int i = 0; i < folder.PackStreams.Size(); i++)
size += PackSizes[packStreamIndex + i];
return size;
}
UInt64 GetFolderPackStreamSize(int folderIndex, int streamIndex) const
{
return PackSizes[FolderStartPackStreamIndex[folderIndex] + streamIndex];
}
UInt64 GetFilePackSize(CNum fileIndex) const
{
CNum folderIndex = FileIndexToFolderIndexMap[fileIndex];
if (folderIndex != kNumNoIndex)
if (FolderStartFileIndex[folderIndex] == fileIndex)
return GetFolderFullPackSize(folderIndex);
return 0;
}
};
class CInByte2
{
const Byte *_buffer;
size_t _size;
public:
size_t _pos;
void Init(const Byte *buffer, size_t size)
{
_buffer = buffer;
_size = size;
_pos = 0;
}
Byte ReadByte();
void ReadBytes(Byte *data, size_t size);
void SkipData(UInt64 size);
void SkipData();
UInt64 ReadNumber();
CNum ReadNum();
UInt32 ReadUInt32();
UInt64 ReadUInt64();
void ReadString(UString &s);
};
class CStreamSwitch;
const UInt32 kHeaderSize = 32;
class CInArchive
{
friend class CStreamSwitch;
CMyComPtr<IInStream> _stream;
CObjectVector<CInByte2> _inByteVector;
CInByte2 *_inByteBack;
UInt64 _arhiveBeginStreamPosition;
Byte _header[kHeaderSize];
UInt64 HeadersSize;
void AddByteStream(const Byte *buffer, size_t size)
{
_inByteVector.Add(CInByte2());
_inByteBack = &_inByteVector.Back();
_inByteBack->Init(buffer, size);
}
void DeleteByteStream()
{
_inByteVector.DeleteBack();
if (!_inByteVector.IsEmpty())
_inByteBack = &_inByteVector.Back();
}
private:
HRESULT FindAndReadSignature(IInStream *stream, const UInt64 *searchHeaderSizeLimit);
void ReadBytes(Byte *data, size_t size) { _inByteBack->ReadBytes(data, size); }
Byte ReadByte() { return _inByteBack->ReadByte(); }
UInt64 ReadNumber() { return _inByteBack->ReadNumber(); }
CNum ReadNum() { return _inByteBack->ReadNum(); }
UInt64 ReadID() { return _inByteBack->ReadNumber(); }
UInt32 ReadUInt32() { return _inByteBack->ReadUInt32(); }
UInt64 ReadUInt64() { return _inByteBack->ReadUInt64(); }
void SkipData(UInt64 size) { _inByteBack->SkipData(size); }
void SkipData() { _inByteBack->SkipData(); }
void WaitAttribute(UInt64 attribute);
void ReadArchiveProperties(CInArchiveInfo &archiveInfo);
void GetNextFolderItem(CFolder &itemInfo);
void ReadHashDigests(int numItems,
CBoolVector &digestsDefined, CRecordVector<UInt32> &digests);
void ReadPackInfo(
UInt64 &dataOffset,
CRecordVector<UInt64> &packSizes,
CBoolVector &packCRCsDefined,
CRecordVector<UInt32> &packCRCs);
void ReadUnpackInfo(
const CObjectVector<CByteBuffer> *dataVector,
CObjectVector<CFolder> &folders);
void ReadSubStreamsInfo(
const CObjectVector<CFolder> &folders,
CRecordVector<CNum> &numUnpackStreamsInFolders,
CRecordVector<UInt64> &unpackSizes,
CBoolVector &digestsDefined,
CRecordVector<UInt32> &digests);
void ReadStreamsInfo(
const CObjectVector<CByteBuffer> *dataVector,
UInt64 &dataOffset,
CRecordVector<UInt64> &packSizes,
CBoolVector &packCRCsDefined,
CRecordVector<UInt32> &packCRCs,
CObjectVector<CFolder> &folders,
CRecordVector<CNum> &numUnpackStreamsInFolders,
CRecordVector<UInt64> &unpackSizes,
CBoolVector &digestsDefined,
CRecordVector<UInt32> &digests);
void ReadBoolVector(int numItems, CBoolVector &v);
void ReadBoolVector2(int numItems, CBoolVector &v);
void ReadUInt64DefVector(const CObjectVector<CByteBuffer> &dataVector,
CUInt64DefVector &v, int numFiles);
HRESULT ReadAndDecodePackedStreams(
DECL_EXTERNAL_CODECS_LOC_VARS
UInt64 baseOffset, UInt64 &dataOffset,
CObjectVector<CByteBuffer> &dataVector
#ifndef _NO_CRYPTO
, ICryptoGetTextPassword *getTextPassword, bool &passwordIsDefined
#endif
);
HRESULT ReadHeader(
DECL_EXTERNAL_CODECS_LOC_VARS
CArchiveDatabaseEx &db
#ifndef _NO_CRYPTO
,ICryptoGetTextPassword *getTextPassword, bool &passwordIsDefined
#endif
);
HRESULT ReadDatabase2(
DECL_EXTERNAL_CODECS_LOC_VARS
CArchiveDatabaseEx &db
#ifndef _NO_CRYPTO
,ICryptoGetTextPassword *getTextPassword, bool &passwordIsDefined
#endif
);
public:
HRESULT Open(IInStream *stream, const UInt64 *searchHeaderSizeLimit); // S_FALSE means is not archive
void Close();
HRESULT ReadDatabase(
DECL_EXTERNAL_CODECS_LOC_VARS
CArchiveDatabaseEx &db
#ifndef _NO_CRYPTO
,ICryptoGetTextPassword *getTextPassword, bool &passwordIsDefined
#endif
);
};
}}
#endif
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