Initialer Commit

CPP/7zip/Archive/Common/MultiStream.h

@@ -0,0 +1,89 @@
+// 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