nuclear@0: /*
nuclear@0: Open Asset Import Library (assimp)
nuclear@0: ----------------------------------------------------------------------
nuclear@0: 
nuclear@0: Copyright (c) 2006-2012, assimp team
nuclear@0: All rights reserved.
nuclear@0: 
nuclear@0: Redistribution and use of this software in source and binary forms, 
nuclear@0: with or without modification, are permitted provided that the 
nuclear@0: following conditions are met:
nuclear@0: 
nuclear@0: * Redistributions of source code must retain the above
nuclear@0: copyright notice, this list of conditions and the
nuclear@0: following disclaimer.
nuclear@0: 
nuclear@0: * Redistributions in binary form must reproduce the above
nuclear@0: copyright notice, this list of conditions and the
nuclear@0: following disclaimer in the documentation and/or other
nuclear@0: materials provided with the distribution.
nuclear@0: 
nuclear@0: * Neither the name of the assimp team, nor the names of its
nuclear@0: contributors may be used to endorse or promote products
nuclear@0: derived from this software without specific prior
nuclear@0: written permission of the assimp team.
nuclear@0: 
nuclear@0: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
nuclear@0: "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
nuclear@0: LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
nuclear@0: A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
nuclear@0: OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
nuclear@0: SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
nuclear@0: LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
nuclear@0: DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
nuclear@0: THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
nuclear@0: (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
nuclear@0: OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
nuclear@0: 
nuclear@0: ----------------------------------------------------------------------
nuclear@0: */
nuclear@0: 
nuclear@0: #ifndef INCLUDED_AI_IRRXML_WRAPPER
nuclear@0: #define INCLUDED_AI_IRRXML_WRAPPER
nuclear@0: 
nuclear@0: // some long includes ....
nuclear@0: #include "irrXML/irrXML.h"
nuclear@0: #include "assimp/IOStream.hpp"
nuclear@0: namespace Assimp	{
nuclear@0: 
nuclear@0: // ---------------------------------------------------------------------------------
nuclear@0: /** @brief Utility class to make IrrXML work together with our custom IO system
nuclear@0:  *  See the IrrXML docs for more details.
nuclear@0:  *
nuclear@0:  *  Construct IrrXML-Reader in BaseImporter::InternReadFile():
nuclear@0:  *  @code
nuclear@0:  * // open the file
nuclear@0:  * boost::scoped_ptr<IOStream> file( pIOHandler->Open( pFile));
nuclear@0:  * if( file.get() == NULL) {
nuclear@0:  *	  throw DeadlyImportError( "Failed to open file " + pFile + ".");
nuclear@0:  * }
nuclear@0:  *
nuclear@0:  * // generate a XML reader for it
nuclear@0:  * boost::scoped_ptr<CIrrXML_IOStreamReader> mIOWrapper( new CIrrXML_IOStreamReader( file.get()));
nuclear@0:  * mReader = irr::io::createIrrXMLReader( mIOWrapper.get());
nuclear@0:  * if( !mReader) {
nuclear@0:  *    ThrowException( "xxxx: Unable to open file.");
nuclear@0:  * }
nuclear@0:  * @endcode
nuclear@0:  **/
nuclear@0: class CIrrXML_IOStreamReader 
nuclear@0: 	: public irr::io::IFileReadCallBack
nuclear@0: {
nuclear@0: public:
nuclear@0: 
nuclear@0: 	// ----------------------------------------------------------------------------------
nuclear@0: 	//! Construction from an existing IOStream
nuclear@0: 	CIrrXML_IOStreamReader(IOStream* _stream)
nuclear@0: 		: stream (_stream)
nuclear@0: 		, t (0)
nuclear@0: 	{
nuclear@0: 
nuclear@0: 		// Map the buffer into memory and convert it to UTF8. IrrXML provides its
nuclear@0: 		// own conversion, which is merely a cast from uintNN_t to uint8_t. Thus,
nuclear@0: 		// it is not suitable for our purposes and we have to do it BEFORE IrrXML
nuclear@0: 		// gets the buffer. Sadly, this forces as to map the whole file into
nuclear@0: 		// memory.
nuclear@0: 
nuclear@0: 		data.resize(stream->FileSize());
nuclear@0: 		stream->Read(&data[0],data.size(),1);
nuclear@0: 
nuclear@0: 		BaseImporter::ConvertToUTF8(data);
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	// ----------------------------------------------------------------------------------
nuclear@0: 	//! Virtual destructor
nuclear@0: 	virtual ~CIrrXML_IOStreamReader() {};
nuclear@0: 
nuclear@0: 	// ----------------------------------------------------------------------------------
nuclear@0: 	//!   Reads an amount of bytes from the file.
nuclear@0: 	/**  @param buffer:       Pointer to output buffer.
nuclear@0: 	 *   @param sizeToRead:   Amount of bytes to read 
nuclear@0: 	 *   @return              Returns how much bytes were read.  */
nuclear@0: 	virtual int read(void* buffer, int sizeToRead)	{
nuclear@0: 		if(sizeToRead<0) {
nuclear@0: 			return 0;
nuclear@0: 		}
nuclear@0: 		if(t+sizeToRead>data.size()) {
nuclear@0: 			sizeToRead = data.size()-t;
nuclear@0: 		}
nuclear@0: 
nuclear@0: 		memcpy(buffer,&data.front()+t,sizeToRead);
nuclear@0: 
nuclear@0: 		t += sizeToRead;
nuclear@0: 		return sizeToRead;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	// ----------------------------------------------------------------------------------
nuclear@0: 	//! Returns size of file in bytes
nuclear@0: 	virtual int getSize()	{
nuclear@0: 		return (int)data.size();
nuclear@0: 	}
nuclear@0: 
nuclear@0: private:
nuclear@0: 	IOStream* stream;
nuclear@0: 	std::vector<char> data;
nuclear@0: 	size_t t;
nuclear@0: 
nuclear@0: }; // ! class CIrrXML_IOStreamReader
nuclear@0: 
nuclear@0: } // ! Assimp
nuclear@0: 
nuclear@0: #endif // !! INCLUDED_AI_IRRXML_WRAPPER