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diff --git a/ovr_sdk_win_23.0.0/LibOVRKernel/Src/Kernel/OVR_SysFile.h b/ovr_sdk_win_23.0.0/LibOVRKernel/Src/Kernel/OVR_SysFile.h
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+/************************************************************************************
+
+PublicHeader:   Kernel
+Filename    :   OVR_SysFile.h
+Content     :   Header for all internal file management - functions and structures
+                to be inherited by OS specific subclasses.
+Created     :   September 19, 2012
+Notes       :
+
+Notes       :   errno may not be preserved across use of GBaseFile member functions
+            :   Directories cannot be deleted while files opened from them are in use
+                (For the GetFullName function)
+
+Copyright   :   Copyright (c) Facebook Technologies, LLC and its affiliates. All rights reserved.
+
+Licensed under the Oculus Master SDK License Version 1.0 (the "License");
+you may not use the Oculus VR Rift SDK except in compliance with the License,
+which is provided at the time of installation or download, or which
+otherwise accompanies this software in either electronic or hard copy form.
+
+You may obtain a copy of the License at
+
+https://developer.oculus.com/licenses/oculusmastersdk-1.0
+
+Unless required by applicable law or agreed to in writing, the Oculus VR SDK
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+************************************************************************************/
+
+#ifndef OVR_SysFile_h
+#define OVR_SysFile_h
+
+#include "OVR_File.h"
+
+namespace OVR {
+
+// ***** Declared classes
+class SysFile;
+
+//-----------------------------------------------------------------------------------
+// *** File Statistics
+
+// This class contents are similar to _stat, providing
+// creation, modify and other information about the file.
+struct FileStat {
+  // No change or create time because they are not available on most systems
+  int64_t ModifyTime;
+  int64_t AccessTime;
+  int64_t FileSize;
+
+  bool operator==(const FileStat& stat) const {
+    return (
+        (ModifyTime == stat.ModifyTime) && (AccessTime == stat.AccessTime) &&
+        (FileSize == stat.FileSize));
+  }
+};
+
+//-----------------------------------------------------------------------------------
+// *** System File
+
+// System file is created to access objects on file system directly
+// This file can refer directly to path.
+// System file can be open & closed several times; however, such use is not recommended
+// This class is realy a wrapper around an implementation of File interface for a
+// particular platform.
+
+class SysFile : public DelegatedFile {
+ protected:
+  SysFile(const SysFile& source) : DelegatedFile() {
+    OVR_UNUSED(source);
+  }
+
+ public:
+  // ** Constructor
+  SysFile();
+  // Opens a file
+  SysFile(const String& path, int flags = Open_Read | Open_Buffered, int mode = Mode_ReadWrite);
+
+  // ** Open & management
+  bool Open(const String& path, int flags = Open_Read | Open_Buffered, int mode = Mode_ReadWrite);
+
+  OVR_FORCE_INLINE bool Create(const String& path, int mode = Mode_ReadWrite) {
+    return Open(path, Open_ReadWrite | Open_Create, mode);
+  }
+
+  // Helper function: obtain file statistics information. In OVR, this is used to detect file
+  // changes.
+  // Return 0 if function failed, most likely because the file doesn't exist.
+  static bool OVR_CDECL GetFileStat(FileStat* pfileStats, const String& path);
+
+  // ** Overrides
+  // Overridden to provide re-open support
+  virtual int GetErrorCode();
+
+  virtual bool IsValid();
+
+  virtual bool Close();
+};
+
+} // Namespace OVR
+
+#endif