diff -r ea891871f481 -r bb5522e88ab2 misc/libphysfs/lzma/CPP/7zip/Archive/Common/InStreamWithCRC.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libphysfs/lzma/CPP/7zip/Archive/Common/InStreamWithCRC.h	Mon Apr 10 12:06:43 2017 -0400
@@ -0,0 +1,69 @@
+// InStreamWithCRC.h
+
+#ifndef __INSTREAMWITHCRC_H
+#define __INSTREAMWITHCRC_H
+
+#include "../../../Common/MyCom.h"
+#include "../../IStream.h"
+
+extern "C" 
+{ 
+#include "../../../../C/7zCrc.h"
+}
+
+class CSequentialInStreamWithCRC: 
+  public ISequentialInStream,
+  public CMyUnknownImp
+{
+public:
+  MY_UNKNOWN_IMP
+
+  STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);
+private:
+  CMyComPtr<ISequentialInStream> _stream;
+  UInt64 _size;
+  UInt32 _crc;
+  bool _wasFinished;
+public:
+  void SetStream(ISequentialInStream *stream) { _stream = stream;  }
+  void Init()
+  {
+    _size = 0;
+    _wasFinished = false;
+    _crc = CRC_INIT_VAL;
+  }
+  void ReleaseStream() { _stream.Release(); }
+  UInt32 GetCRC() const { return CRC_GET_DIGEST(_crc); }
+  UInt64 GetSize() const { return _size; }
+  bool WasFinished() const { return _wasFinished; }
+};
+
+class CInStreamWithCRC: 
+  public IInStream,
+  public CMyUnknownImp
+{
+public:
+  MY_UNKNOWN_IMP1(IInStream)
+
+  STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);
+  STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition);
+private:
+  CMyComPtr<IInStream> _stream;
+  UInt64 _size;
+  UInt32 _crc;
+  bool _wasFinished;
+public:
+  void SetStream(IInStream *stream) { _stream = stream;  }
+  void Init()
+  {
+    _size = 0;
+    _wasFinished = false;
+    _crc = CRC_INIT_VAL;
+  }
+  void ReleaseStream() { _stream.Release(); }
+  UInt32 GetCRC() const { return CRC_GET_DIGEST(_crc); }
+  UInt64 GetSize() const { return _size; }
+  bool WasFinished() const { return _wasFinished; }
+};
+
+#endif