Index: src/libchcore/TLocalFilesystemFile.h
===================================================================
diff -u -N -r27c262eb9cae55720e10f4886af6b5a82cb94fe9 -r479ad4e8f81a68cbf6d1623cd9b1f3342d8cfdcc
--- src/libchcore/TLocalFilesystemFile.h	(.../TLocalFilesystemFile.h)	(revision 27c262eb9cae55720e10f4886af6b5a82cb94fe9)
+++ src/libchcore/TLocalFilesystemFile.h	(.../TLocalFilesystemFile.h)	(revision 479ad4e8f81a68cbf6d1623cd9b1f3342d8cfdcc)
@@ -31,12 +31,14 @@
 	public:
 		virtual ~TLocalFilesystemFile();
 
-		virtual bool OpenExistingForReading(bool bNoBuffering) override;
-		virtual bool CreateNewForWriting(bool bNoBuffering) override;
-		virtual bool OpenExistingForWriting(bool bNoBuffering) override;
+		virtual bool OpenExistingForReading() override;
+		virtual bool CreateNewForWriting() override;
+		virtual bool OpenExistingForWriting() override;
 
-		virtual bool Truncate(long long llNewSize) override;
+		virtual file_size_t GetSeekPositionForResume(file_size_t fsLastAvailablePosition);
 
+		virtual bool Truncate(file_size_t fsNewSize) override;
+
 		virtual bool ReadFile(TOverlappedDataBuffer& rBuffer) override;
 		virtual bool WriteFile(TOverlappedDataBuffer& rBuffer) override;
 		virtual bool FinalizeFile(TOverlappedDataBuffer& rBuffer) override;
@@ -48,9 +50,12 @@
 		virtual void Close() override;
 
 	private:
-		TLocalFilesystemFile(const TSmartPath& pathFile);
-		DWORD GetFlagsAndAttributes(bool bNoBuffering) const;
+		TLocalFilesystemFile(const TSmartPath& pathFile, bool bNoBuffering);
 
+		constexpr DWORD GetFlagsAndAttributes(bool bNoBuffering) const;
+
+		bool OpenExistingForWriting(bool bNoBuffering);
+
 	private:
 		TSmartPath m_pathFile;
 		HANDLE m_hFile;