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diff --git a/thirdparty/assimp/code/FileLogStream.h b/thirdparty/assimp/code/FileLogStream.h
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+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+copyright notice, this list of conditions and the
+following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the
+following disclaimer in the documentation and/or other
+materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+contributors may be used to endorse or promote products
+derived from this software without specific prior
+written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+/** @file FileLofStream.h
+*/
+#ifndef ASSIMP_FILELOGSTREAM_H_INC
+#define ASSIMP_FILELOGSTREAM_H_INC
+
+#include <assimp/LogStream.hpp>
+#include <assimp/IOStream.hpp>
+#include <assimp/DefaultIOSystem.h>
+
+namespace Assimp    {
+
+// ----------------------------------------------------------------------------------
+/** @class  FileLogStream
+ *  @brief  Logstream to write into a file.
+ */
+class FileLogStream :
+    public LogStream
+{
+public:
+    FileLogStream( const char* file, IOSystem* io = NULL );
+    ~FileLogStream();
+    void write( const char* message );
+
+private:
+    IOStream *m_pStream;
+};
+
+// ----------------------------------------------------------------------------------
+//  Constructor
+inline FileLogStream::FileLogStream( const char* file, IOSystem* io ) :
+    m_pStream(NULL)
+{
+    if ( !file || 0 == *file )
+        return;
+
+    // If no IOSystem is specified: take a default one
+    if (!io)
+    {
+        DefaultIOSystem FileSystem;
+        m_pStream = FileSystem.Open( file, "wt");
+    }
+    else m_pStream = io->Open( file, "wt" );
+}
+
+// ----------------------------------------------------------------------------------
+//  Destructor
+inline FileLogStream::~FileLogStream()
+{
+    // The virtual d'tor should destroy the underlying file
+    delete m_pStream;
+}
+
+// ----------------------------------------------------------------------------------
+//  Write method
+inline void FileLogStream::write( const char* message )
+{
+    if (m_pStream != NULL)
+    {
+        m_pStream->Write(message, sizeof(char), ::strlen(message));
+        m_pStream->Flush();
+    }
+}
+
+// ----------------------------------------------------------------------------------
+} // !Namespace Assimp
+
+#endif // !! ASSIMP_FILELOGSTREAM_H_INC