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diff --git a/libs/assimp/samples/SharedCode/UTFConverter.h b/libs/assimp/samples/SharedCode/UTFConverter.h
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+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2020, 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 ASSIMP_SAMPLES_SHARED_CODE_UTFCONVERTER_H
+#define ASSIMP_SAMPLES_SHARED_CODE_UTFCONVERTER_H
+
+#include <string>
+#include <locale>
+#include <codecvt>
+
+namespace AssimpSamples {
+namespace SharedCode {
+
+// Used to convert between multibyte and unicode strings.
+class UTFConverter {
+    using UTFConverterImpl = std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t>;
+public:
+    UTFConverter(const char* s) :
+        s_(s),
+        ws_(impl_.from_bytes(s)) {
+    }
+    UTFConverter(const wchar_t* s) :
+        s_(impl_.to_bytes(s)),
+        ws_(s) {
+    }
+    UTFConverter(const std::string& s) :
+        s_(s),
+        ws_(impl_.from_bytes(s)) {
+    }
+    UTFConverter(const std::wstring& s) :
+        s_(impl_.to_bytes(s)),
+        ws_(s) {
+    }
+    inline const char* c_str() const {
+        return s_.c_str();
+    }
+    inline const std::string& str() const {
+        return s_;
+    }
+    inline const wchar_t* c_wstr() const {
+        return ws_.c_str();
+    }
+private:
+    static UTFConverterImpl impl_;
+    std::string s_;
+    std::wstring ws_;
+};
+
+}
+}
+
+#endif // ASSIMP_SAMPLES_SHARED_CODE_UTFCONVERTER_H