3.13

7zip/Archive/Common/InStreamWithCRC.h

@@ -0,0 +1,38 @@
+// InStreamWithCRC.h
+
+// #pragma once
+
+#ifndef __INSTREAMWITHCRC_H
+#define __INSTREAMWITHCRC_H
+
+#include "../../../Common/CRC.h"
+#include "../../../Common/MyCom.h"
+#include "../../IStream.h"
+
+class CInStreamWithCRC: 
+  public IInStream,
+  public CMyUnknownImp
+{
+public:
+  MY_UNKNOWN_IMP
+
+  STDMETHOD(Read)(void *data, UINT32 size, UINT32 *processedSize);
+  STDMETHOD(ReadPart)(void *data, UINT32 size, UINT32 *processedSize);
+  STDMETHOD(Seek)(INT64 offset, UINT32 seekOrigin, UINT64 *newPosition);
+private:
+  CMyComPtr<IInStream> _stream;
+  UINT64 _size;
+  CCRC _crc;
+public:
+  void Init(IInStream *stream)
+  {
+    _stream = stream;
+    _size = 0;
+    _crc.Init();
+  }
+  void ReleaseStream() { _stream.Release(); }
+  UINT32 GetCRC() const { return _crc.GetDigest(); }
+  UINT64 GetSize() const { return _size; }
+};
+
+#endif