Add LZMA.

3rdparty/lzma-21.03beta/CPP/7zip/Archive/Common/OutStreamWithCRC.cpp

@@ -0,0 +1,18 @@
+// OutStreamWithCRC.cpp
+
+#include "StdAfx.h"
+
+#include "OutStreamWithCRC.h"
+
+STDMETHODIMP COutStreamWithCRC::Write(const void *data, UInt32 size, UInt32 *processedSize)
+{
+  HRESULT result = S_OK;
+  if (_stream)
+    result = _stream->Write(data, size, &size);
+  if (_calculate)
+    _crc = CrcUpdate(_crc, data, size);
+  _size += size;
+  if (processedSize != NULL)
+    *processedSize = size;
+  return result;
+}