Add Assimp library in thirdparty

From https://github.com/assimp/assimp repo at d2b45377e4b09a1f43be95e45553afcc06b03f4b

thirdparty/assimp/code/FBXUtil.cpp

@@ -0,0 +1,120 @@
+/*
+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  FBXUtil.cpp
+ *  @brief Implementation of internal FBX utility functions
+ */
+
+#include "FBXUtil.h"
+#include "FBXTokenizer.h"
+
+#include <assimp/TinyFormatter.h>
+#include <string>
+
+#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
+
+namespace Assimp {
+namespace FBX {
+namespace Util {
+
+// ------------------------------------------------------------------------------------------------
+const char* TokenTypeString(TokenType t)
+{
+    switch(t) {
+        case TokenType_OPEN_BRACKET:
+            return "TOK_OPEN_BRACKET";
+
+        case TokenType_CLOSE_BRACKET:
+            return "TOK_CLOSE_BRACKET";
+
+        case TokenType_DATA:
+            return "TOK_DATA";
+
+        case TokenType_COMMA:
+            return "TOK_COMMA";
+
+        case TokenType_KEY:
+            return "TOK_KEY";
+
+        case TokenType_BINARY_DATA:
+            return "TOK_BINARY_DATA";
+    }
+
+    ai_assert(false);
+    return "";
+}
+
+
+// ------------------------------------------------------------------------------------------------
+std::string AddOffset(const std::string& prefix, const std::string& text, unsigned int offset)
+{
+    return static_cast<std::string>( (Formatter::format() << prefix << " (offset 0x" << std::hex << offset << ") " << text) );
+}
+
+// ------------------------------------------------------------------------------------------------
+std::string AddLineAndColumn(const std::string& prefix, const std::string& text, unsigned int line, unsigned int column)
+{
+    return static_cast<std::string>( (Formatter::format() << prefix << " (line " << line << " <<  col " << column << ") " << text) );
+}
+
+// ------------------------------------------------------------------------------------------------
+std::string AddTokenText(const std::string& prefix, const std::string& text, const Token* tok)
+{
+    if(tok->IsBinary()) {
+        return static_cast<std::string>( (Formatter::format() << prefix <<
+            " (" << TokenTypeString(tok->Type()) <<
+            ", offset 0x" << std::hex << tok->Offset() << ") " <<
+            text) );
+    }
+
+    return static_cast<std::string>( (Formatter::format() << prefix <<
+        " (" << TokenTypeString(tok->Type()) <<
+        ", line " << tok->Line() <<
+        ", col " << tok->Column() << ") " <<
+        text) );
+}
+
+} // !Util
+} // !FBX
+} // !Assimp
+
+#endif