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// MultiStream.h
#ifndef __MULTI_STREAM_H
#define __MULTI_STREAM_H
#include "../../../Common/MyCom.h"
#include "../../../Common/MyVector.h"
#include "../../IStream.h"
class CMultiStream:
public IInStream,
public CMyUnknownImp
{
UInt64 _pos;
UInt64 _totalLength;
unsigned _streamIndex;
public:
struct CSubStreamInfo
{
CMyComPtr<IInStream> Stream;
UInt64 Size;
UInt64 GlobalOffset;
UInt64 LocalPos;
CSubStreamInfo(): Size(0), GlobalOffset(0), LocalPos(0) {}
};
CObjectVector<CSubStreamInfo> Streams;
HRESULT Init()
{
UInt64 total = 0;
FOR_VECTOR (i, Streams)
{
CSubStreamInfo &s = Streams[i];
s.GlobalOffset = total;
total += Streams[i].Size;
RINOK(s.Stream->Seek(0, STREAM_SEEK_CUR, &s.LocalPos));
}
_totalLength = total;
_pos = 0;
_streamIndex = 0;
return S_OK;
}
MY_UNKNOWN_IMP1(IInStream)
STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);
STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition);
};
/*
class COutMultiStream:
public IOutStream,
public CMyUnknownImp
{
unsigned _streamIndex; // required stream
UInt64 _offsetPos; // offset from start of _streamIndex index
UInt64 _absPos;
UInt64 _length;
struct CSubStreamInfo
{
CMyComPtr<ISequentialOutStream> Stream;
UInt64 Size;
UInt64 Pos;
};
CObjectVector<CSubStreamInfo> Streams;
public:
CMyComPtr<IArchiveUpdateCallback2> VolumeCallback;
void Init()
{
_streamIndex = 0;
_offsetPos = 0;
_absPos = 0;
_length = 0;
}
MY_UNKNOWN_IMP1(IOutStream)
STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize);
STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition);
};
*/
#endif
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