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// Archive/ZipIn.h
#ifndef __ZIP_IN_H
#define __ZIP_IN_H
#include "Common/MyCom.h"
#include "../../IStream.h"
#include "ZipHeader.h"
#include "ZipItemEx.h"
namespace NArchive {
namespace NZip {
class CInArchiveException
{
public:
enum ECauseType
{
kUnexpectedEndOfArchive = 0,
kArchiceHeaderCRCError,
kFileHeaderCRCError,
kIncorrectArchive,
kDataDescroptorsAreNotSupported,
kMultiVolumeArchiveAreNotSupported,
kReadStreamError,
kSeekStreamError
}
Cause;
CInArchiveException(ECauseType cause): Cause(cause) {}
};
class CInArchiveInfo
{
public:
UInt64 Base;
UInt64 StartPosition;
CByteBuffer Comment;
CInArchiveInfo(): Base(0), StartPosition(0) {}
void Clear()
{
Base = 0;
StartPosition = 0;
Comment.SetCapacity(0);
}
};
class CProgressVirt
{
public:
STDMETHOD(SetCompleted)(const UInt64 *numFiles) PURE;
};
struct CCdInfo
{
// UInt64 NumEntries;
UInt64 Size;
UInt64 Offset;
};
class CInArchive
{
CMyComPtr<IInStream> m_Stream;
UInt32 m_Signature;
UInt64 m_StreamStartPosition;
UInt64 m_Position;
CInArchiveInfo m_ArchiveInfo;
AString m_NameBuffer;
HRESULT Seek(UInt64 offset);
bool FindAndReadMarker(const UInt64 *searchHeaderSizeLimit);
bool ReadUInt32(UInt32 &signature);
AString ReadFileName(UInt32 nameSize);
HRESULT ReadBytes(void *data, UInt32 size, UInt32 *processedSize);
bool ReadBytesAndTestSize(void *data, UInt32 size);
void SafeReadBytes(void *data, UInt32 size);
void ReadBuffer(CByteBuffer &buffer, UInt32 size);
Byte ReadByte();
UInt16 ReadUInt16();
UInt32 ReadUInt32();
UInt64 ReadUInt64();
void IncreaseRealPosition(UInt64 addValue);
void ReadExtra(UInt32 extraSize, CExtraBlock &extraBlock,
UInt64 &unpackSize, UInt64 &packSize, UInt64 &localHeaderOffset, UInt32 &diskStartNumber);
HRESULT ReadLocalItem(CItemEx &item);
HRESULT ReadLocalItemDescriptor(CItemEx &item);
HRESULT ReadCdItem(CItemEx &item);
HRESULT TryEcd64(UInt64 offset, CCdInfo &cdInfo);
HRESULT FindCd(CCdInfo &cdInfo);
HRESULT TryReadCd(CObjectVector<CItemEx> &items, UInt64 cdOffset, UInt64 cdSize);
HRESULT ReadCd(CObjectVector<CItemEx> &items, UInt64 &cdOffset, UInt64 &cdSize);
HRESULT ReadLocalsAndCd(CObjectVector<CItemEx> &items, CProgressVirt *progress, UInt64 &cdOffset);
public:
HRESULT ReadHeaders(CObjectVector<CItemEx> &items, CProgressVirt *progress);
HRESULT ReadLocalItemAfterCdItem(CItemEx &item);
HRESULT ReadLocalItemAfterCdItemFull(CItemEx &item);
bool Open(IInStream *inStream, const UInt64 *searchHeaderSizeLimit);
void Close();
void GetArchiveInfo(CInArchiveInfo &archiveInfo) const;
bool SeekInArchive(UInt64 position);
ISequentialInStream *CreateLimitedStream(UInt64 position, UInt64 size);
IInStream* CreateStream();
};
}}
#endif
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