diff -r ea891871f481 -r bb5522e88ab2 misc/libphysfs/lzma/CPP/7zip/Common/OffsetStream.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libphysfs/lzma/CPP/7zip/Common/OffsetStream.h	Mon Apr 10 12:06:43 2017 -0400
@@ -0,0 +1,25 @@
+// OffsetStream.h
+
+#ifndef __OFFSETSTREAM_H
+#define __OFFSETSTREAM_H
+
+#include "Common/MyCom.h"
+#include "../IStream.h"
+
+class COffsetOutStream: 
+  public IOutStream,
+  public CMyUnknownImp
+{
+  UInt64 _offset;
+  CMyComPtr<IOutStream> _stream;
+public:
+  HRESULT Init(IOutStream *stream, UInt64 offset);
+  
+  MY_UNKNOWN_IMP
+
+  STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize);
+  STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition);
+  STDMETHOD(SetSize)(Int64 newSize);
+};
+
+#endif