1 files changed, 50 insertions, 0 deletions
diff --git a/src/inc/fstream.h b/src/inc/fstream.h
new file mode 100644
index 0000000000..aa81ec8cfd
--- /dev/null
+++ b/src/inc/fstream.h
@@ -0,0 +1,50 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+
+#ifndef __FSTREAM_H_INCLUDED__
+#define __FSTREAM_H_INCLUDED__
+
+#include <objidl.h> 
+
+class CFileStream : public IStream
+{
+    public:
+        CFileStream();
+        virtual ~CFileStream();
+
+        HRESULT OpenForRead(LPCWSTR wzFilePath);
+        HRESULT OpenForWrite(LPCWSTR wzFilePath);
+
+        // IUnknown methods:
+        STDMETHODIMP_(ULONG) AddRef();
+        STDMETHODIMP_(ULONG) Release();
+        STDMETHODIMP QueryInterface(REFIID riid, LPVOID *ppvObj);
+
+        // ISequentialStream methods:
+        STDMETHODIMP Read(void *pv, ULONG cb, ULONG *pcbRead);
+        STDMETHODIMP Write(void const *pv, ULONG cb, ULONG *pcbWritten);
+    
+        // IStream methods:
+        STDMETHODIMP Seek(LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER *plibNewPosition);
+        STDMETHODIMP SetSize(ULARGE_INTEGER libNewSize);
+        STDMETHODIMP CopyTo(IStream *pstm, ULARGE_INTEGER cb, ULARGE_INTEGER *pcbRead, ULARGE_INTEGER *pcbWritten);
+        STDMETHODIMP Commit(DWORD grfCommitFlags);
+        STDMETHODIMP Revert();
+        STDMETHODIMP LockRegion(ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType);
+        STDMETHODIMP UnlockRegion(ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType);
+        STDMETHODIMP Stat(STATSTG *pstatstg, DWORD grfStatFlag);
+        STDMETHODIMP Clone(IStream **ppIStream);
+
+    private:
+        BOOL Close();
+
+    private:
+        LONG                                _cRef;
+        HANDLE                              _hFile;
+    
+};
+
+#endif
+