MD5 bugfix.

WIP version of the OptimizeGraph-Step.
Added hashes to some string routines (speedup).
Improved property system for float and strings.
Refactoring code for computing normals from smoothinggroups.
Implemented C-ASSIMP.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@116 67173fc5-114c-0410-ac8e-9d2fd5bffc1f

code/DXFLoader.cpp

@@ -0,0 +1,100 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (ASSIMP)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2008, ASSIMP Development 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 Development 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 Implementation of the DXF importer class */
+#include "DXFLoader.h"
+
+// public ASSIMP headers
+#include "../include/aiScene.h"
+#include "../include/aiAssert.h"
+#include "../include/IOStream.h"
+#include "../include/IOSystem.h"
+
+#include "../include/DefaultLogger.h"
+
+// boost headers
+#include <boost/scoped_ptr.hpp>
+
+using namespace Assimp;
+
+// ------------------------------------------------------------------------------------------------
+// Constructor to be privately used by Importer
+DXFImporter::DXFImporter()
+{
+		// nothing to do here
+}
+
+// ------------------------------------------------------------------------------------------------
+// Destructor, private as well 
+DXFImporter::~DXFImporter()
+{
+	// nothing to do here
+}
+
+// ------------------------------------------------------------------------------------------------
+// Returns whether the class can handle the format of the given file. 
+bool DXFImporter::CanRead( const std::string& pFile, IOSystem* pIOHandler) const
+{
+	// simple check of file extension is enough for the moment
+	std::string::size_type pos = pFile.find_last_of('.');
+	// no file extension - can't read
+	if( pos == std::string::npos)
+		return false;
+	std::string extension = pFile.substr( pos);
+
+	return !(extension.length() != 4 || extension[0] != '.' ||
+			 extension[1] != 'd' && extension[1] != 'D' ||
+			 extension[2] != 'x' && extension[2] != 'X' ||
+			 extension[3] != 'f' && extension[3] != 'F');
+}
+// ------------------------------------------------------------------------------------------------
+// Imports the given file into the given scene structure. 
+void DXFImporter::InternReadFile( const std::string& pFile, 
+	aiScene* pScene, IOSystem* pIOHandler)
+{
+	boost::scoped_ptr<IOStream> file( pIOHandler->Open( pFile));
+
+	// Check whether we can read from the file
+	if( file.get() == NULL)
+		throw new ImportErrorException( "Failed to open DXF file " + pFile + "");
+
+	throw new ImportErrorException("DXF: not yet implemented");
+}