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diff --git a/src/mesh/assimp-master/include/assimp/cfileio.h b/src/mesh/assimp-master/include/assimp/cfileio.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 cfileio.h
+ *  @brief Defines generic C routines to access memory-mapped files
+ */
+#pragma once
+#ifndef AI_FILEIO_H_INC
+#define AI_FILEIO_H_INC
+
+#ifdef __GNUC__
+#   pragma GCC system_header
+#endif
+
+#include <assimp/types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct aiFileIO;
+struct aiFile;
+
+// aiFile callbacks
+typedef size_t          (*aiFileWriteProc) (C_STRUCT aiFile*,   const char*, size_t, size_t);
+typedef size_t          (*aiFileReadProc)  (C_STRUCT aiFile*,   char*, size_t,size_t);
+typedef size_t          (*aiFileTellProc)  (C_STRUCT aiFile*);
+typedef void            (*aiFileFlushProc) (C_STRUCT aiFile*);
+typedef C_ENUM aiReturn (*aiFileSeek)      (C_STRUCT aiFile*, size_t, C_ENUM aiOrigin);
+
+// aiFileIO callbacks
+typedef C_STRUCT aiFile* (*aiFileOpenProc)  (C_STRUCT aiFileIO*, const char*, const char*);
+typedef void             (*aiFileCloseProc) (C_STRUCT aiFileIO*, C_STRUCT aiFile*);
+
+// Represents user-defined data
+typedef char* aiUserData;
+
+// ----------------------------------------------------------------------------------
+/** @brief C-API: File system callbacks
+ *
+ *  Provided are functions to open and close files. Supply a custom structure to
+ *  the import function. If you don't, a default implementation is used. Use custom
+ *  file systems to enable reading from other sources, such as ZIPs
+ *  or memory locations. */
+struct aiFileIO
+{
+    /** Function used to open a new file
+     */
+    aiFileOpenProc OpenProc;
+
+    /** Function used to close an existing file
+     */
+    aiFileCloseProc CloseProc;
+
+    /** User-defined, opaque data */
+    aiUserData UserData;
+};
+
+// ----------------------------------------------------------------------------------
+/** @brief C-API: File callbacks
+ *
+ *  Actually, it's a data structure to wrap a set of fXXXX (e.g fopen)
+ *  replacement functions.
+ *
+ *  The default implementation of the functions utilizes the fXXX functions from
+ *  the CRT. However, you can supply a custom implementation to Assimp by
+ *  delivering a custom aiFileIO. Use this to enable reading from other sources,
+ *  such as ZIP archives or memory locations. */
+struct aiFile {
+    /** Callback to read from a file */
+    aiFileReadProc ReadProc;
+
+    /** Callback to write to a file */
+    aiFileWriteProc WriteProc;
+
+    /** Callback to retrieve the current position of
+     *  the file cursor (ftell())
+     */
+    aiFileTellProc TellProc;
+
+    /** Callback to retrieve the size of the file,
+     *  in bytes
+     */
+    aiFileTellProc FileSizeProc;
+
+    /** Callback to set the current position
+     * of the file cursor (fseek())
+     */
+    aiFileSeek SeekProc;
+
+    /** Callback to flush the file contents
+     */
+    aiFileFlushProc FlushProc;
+
+    /** User-defined, opaque data
+     */
+    aiUserData UserData;
+};
+
+#ifdef __cplusplus
+}
+#endif
+#endif // AI_FILEIO_H_INC