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-rwxr-xr-xCPP/7zip/Archive/Common/MultiStream.h84
1 files changed, 84 insertions, 0 deletions
diff --git a/CPP/7zip/Archive/Common/MultiStream.h b/CPP/7zip/Archive/Common/MultiStream.h
new file mode 100755
index 0000000..74ec6ad
--- /dev/null
+++ b/CPP/7zip/Archive/Common/MultiStream.h
@@ -0,0 +1,84 @@
+// 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;
+ int _streamIndex;
+public:
+ struct CSubStreamInfo
+ {
+ CMyComPtr<IInStream> Stream;
+ UInt64 Size;
+ UInt64 GlobalOffset;
+ UInt64 LocalPos;
+ };
+ CObjectVector<CSubStreamInfo> Streams;
+
+ HRESULT Init()
+ {
+ UInt64 total = 0;
+ for (int i = 0; i < Streams.Size(); i++)
+ {
+ 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
+{
+ int _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