diff -r ea891871f481 -r bb5522e88ab2 misc/libphysfs/lzma/CPP/Windows/FileMapping.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libphysfs/lzma/CPP/Windows/FileMapping.h	Mon Apr 10 12:06:43 2017 -0400
@@ -0,0 +1,50 @@
+// Windows/FileMapping.h
+
+#ifndef __WINDOWS_FILEMAPPING_H
+#define __WINDOWS_FILEMAPPING_H
+
+#include "Windows/Handle.h"
+#include "Windows/Defs.h"
+
+namespace NWindows {
+// namespace NFile {
+// namespace NMapping {
+
+class CFileMapping: public CHandle
+{
+public:
+  bool Create(HANDLE file, LPSECURITY_ATTRIBUTES attributes,
+    DWORD protect, UINT64 maximumSize, LPCTSTR name)
+  {
+    _handle = ::CreateFileMapping(file, attributes,
+      protect, DWORD(maximumSize >> 32), DWORD(maximumSize), name);
+    return (_handle != NULL);
+  }
+
+  bool Open(DWORD desiredAccess, bool inheritHandle, LPCTSTR name)
+  {
+    _handle = ::OpenFileMapping(desiredAccess, BoolToBOOL(inheritHandle), name);
+    return (_handle != NULL);
+  }
+
+  LPVOID MapViewOfFile(DWORD desiredAccess, UINT64 fileOffset, 
+      SIZE_T numberOfBytesToMap)
+  {
+    return ::MapViewOfFile(_handle, desiredAccess, 
+        DWORD(fileOffset >> 32), DWORD(fileOffset), numberOfBytesToMap);
+  }
+
+  LPVOID MapViewOfFileEx(DWORD desiredAccess, UINT64 fileOffset, 
+      SIZE_T numberOfBytesToMap, LPVOID baseAddress)
+  {
+    return ::MapViewOfFileEx(_handle, desiredAccess, 
+      DWORD(fileOffset >> 32), DWORD(fileOffset), 
+      numberOfBytesToMap, baseAddress);
+  }
+  
+
+};
+
+}
+
+#endif