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diff --git a/src/mesh/assimp-master/code/AssetLib/STEPParser/STEPFileReader.h b/src/mesh/assimp-master/code/AssetLib/STEPParser/STEPFileReader.h
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+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2022, 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.
+
+----------------------------------------------------------------------
+*/
+
+#ifndef INCLUDED_AI_STEPFILEREADER_H
+#define INCLUDED_AI_STEPFILEREADER_H
+
+#include "AssetLib/Step/STEPFile.h"
+
+namespace Assimp {
+namespace STEP {
+
+// --------------------------------------------------------------------------
+/// @brief  Parsing a STEP file is a twofold procedure.
+/// 1) read file header and return to caller, who checks if the
+///    file is of a supported schema ..
+DB* ReadFileHeader(std::shared_ptr<IOStream> stream);
+
+/// 2) read the actual file contents using a user-supplied set of
+///    conversion functions to interpret the data.
+void ReadFile(DB& db,const EXPRESS::ConversionSchema& scheme, const char* const* types_to_track, size_t len, const char* const* inverse_indices_to_track, size_t len2);
+
+/// @brief  Helper to read a file.
+template <size_t N, size_t N2>
+inline
+void ReadFile(DB& db,const EXPRESS::ConversionSchema& scheme, const char* const (&arr)[N], const char* const (&arr2)[N2]) {
+    return ReadFile(db,scheme,arr,N,arr2,N2);
+}
+
+} // ! STEP
+} // ! Assimp
+
+#endif // INCLUDED_AI_STEPFILEREADER_H