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diff --git a/src/mesh/assimp-master/include/assimp/DefaultIOSystem.h b/src/mesh/assimp-master/include/assimp/DefaultIOSystem.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.
+
+----------------------------------------------------------------------
+*/
+
+/**
+ *  @file Default implementation of IOSystem using the standard C file functions
+ */
+#pragma once
+#ifndef AI_DEFAULTIOSYSTEM_H_INC
+#define AI_DEFAULTIOSYSTEM_H_INC
+
+#ifdef __GNUC__
+#   pragma GCC system_header
+#endif
+
+#include <assimp/IOSystem.hpp>
+
+namespace Assimp    {
+
+// ---------------------------------------------------------------------------
+/** Default implementation of IOSystem using the standard C file functions */
+class ASSIMP_API DefaultIOSystem : public IOSystem {
+public:
+    // -------------------------------------------------------------------
+    /** Tests for the existence of a file at the given path. */
+    bool Exists( const char* pFile) const override;
+
+    // -------------------------------------------------------------------
+    /** Returns the directory separator. */
+    char getOsSeparator() const override;
+
+    // -------------------------------------------------------------------
+    /** Open a new file with a given path. */
+    IOStream* Open( const char* pFile, const char* pMode = "rb") override;
+
+    // -------------------------------------------------------------------
+    /** Closes the given file and releases all resources associated with it. */
+    void Close( IOStream* pFile) override;
+
+    // -------------------------------------------------------------------
+    /** Compare two paths */
+    bool ComparePaths (const char* one, const char* second) const override;
+
+    /** @brief get the file name of a full filepath
+     * example: /tmp/archive.tar.gz -> archive.tar.gz
+     */
+    static std::string fileName( const std::string &path );
+
+    /** @brief get the complete base name of a full filepath
+     * example: /tmp/archive.tar.gz -> archive.tar
+     */
+    static std::string completeBaseName( const std::string &path);
+
+    /** @brief get the path of a full filepath
+     * example: /tmp/archive.tar.gz -> /tmp/
+     */
+    static std::string absolutePath( const std::string &path);
+};
+
+} //!ns Assimp
+
+#endif //AI_DEFAULTIOSYSTEM_H_INC