Ejemplos de ISaveReaderPtr::Seek en C++ (Cpp)

Ejemplo n.º 1

Archivo: XMLCPB_Reader.cpp Proyecto: NightOwlsEntertainment/PetBox_A_Journey_to_Conquer_Elementary_Algebra

bool CReader::CheckFileCorruption( IPlatformOS::ISaveReaderPtr& pOSSaveReader, const SFileHeader& fileHeader, uint32 totalSize )
{
	bool error = false;

	if (totalSize<=sizeof(fileHeader))
	{
		CryWarning( VALIDATOR_MODULE_SYSTEM, VALIDATOR_ERROR, "XMLCPB ERROR: size check failed. savegame File corrupted! (probably not fully saved)" );
		error = true;
		return error;
	}

	uint32 sizeToCheck = totalSize - sizeof(fileHeader);

	char* pBuf = new char[sizeToCheck];
	pOSSaveReader->Seek( 0, IPlatformOS::ISaveReader::ESM_BEGIN );
	ReadDataFromFileInternal( pOSSaveReader, pBuf, sizeToCheck );
	
	IZLibCompressor* pZLib = GetISystem()->GetIZLibCompressor();

	if (!pZLib)
	{
		SAFE_DELETE_ARRAY(pBuf);
		error = true;
		return error;
	}

	SMD5Context context;
	char MD5signature[SFileHeader::MD5_SIGNATURE_SIZE];
	pZLib->MD5Init(&context);
	pZLib->MD5Update(&context, pBuf, sizeToCheck); 

	SFileHeader tempFileHeader = fileHeader;
	for (uint32 i=0; i<SFileHeader::MD5_SIGNATURE_SIZE; ++i) tempFileHeader.m_MD5Signature[i] = 0; // the original signature is always calculated with this zeroed.
	pZLib->MD5Update(&context, (const char*)(&tempFileHeader), sizeof(tempFileHeader));
	pZLib->MD5Final(&context, MD5signature); 
	
	SAFE_DELETE_ARRAY( pBuf );

	for (uint32 i=0; i<SFileHeader::MD5_SIGNATURE_SIZE; ++i)
	{
		if (fileHeader.m_MD5Signature[i]!=MD5signature[i])
		{
			CryWarning( VALIDATOR_MODULE_SYSTEM, VALIDATOR_ERROR, "XMLCPB ERROR: md5 check failed. savegame File corrupted!" );
			error = true;
			break;
		}
	}

	return error;
}

Ejemplo n.º 2

Archivo: XMLCPB_Reader.cpp Proyecto: NightOwlsEntertainment/PetBox_A_Journey_to_Conquer_Elementary_Algebra

bool CReader::ReadBinaryFile( const char* pFileName )
{
	IPlatformOS::ISaveReaderPtr pOSSaveReader = gEnv->pSystem->GetPlatformOS()->SaveGetReader( pFileName, IPlatformOS::Unknown_User );
	if (!m_pZLibBuffer)
		m_pZLibBuffer = new uint8[ XMLCPB_ZLIB_BUFFER_SIZE ];
	if (!m_pZLibCompressedBuffer)
		m_pZLibCompressedBuffer = new uint8[ XMLCPB_ZLIB_BUFFER_SIZE ];
	m_errorReading = pOSSaveReader.get()==NULL;
	
	if (!m_errorReading)
	{
		size_t totalNumBytesInFile = 0;
		IPlatformOS::EFileOperationCode code = pOSSaveReader->GetNumBytes( totalNumBytesInFile );
		m_totalSize = totalNumBytesInFile;
		CheckErrorFlag( code );

		if (!m_errorReading)
		{
			SFileHeader fileHeader;
			pOSSaveReader->Seek( -int(sizeof(fileHeader)), IPlatformOS::ISaveReader::ESM_END );
			ReadDataFromFileInternal( pOSSaveReader, &fileHeader, sizeof(fileHeader) );
#ifdef XMLCPB_CHECK_FILE_INTEGRITY			
			m_errorReading = CheckFileCorruption( pOSSaveReader, fileHeader, m_totalSize );
#endif			
			
			pOSSaveReader->Seek( 0, IPlatformOS::ISaveReader::ESM_BEGIN );
			
			if (fileHeader.m_fileTypeCheck!=fileHeader.FILETYPECHECK)
			{
				CryWarning( VALIDATOR_MODULE_SYSTEM, VALIDATOR_ERROR, "XMLCPB ERROR: file type signature not correct. Savegame File corrupted!" );
				m_errorReading = true;
			}
			
			if (!m_errorReading)
			{
				m_nodesDataSize = fileHeader.m_sizeNodes;
				m_numNodes = fileHeader.m_numNodes;
				m_buffer.ReadFromFile( *this, pOSSaveReader, fileHeader.m_sizeNodes );
				m_tableTags.ReadFromFile( *this, pOSSaveReader, fileHeader.m_tags );
				m_tableAttrNames.ReadFromFile( *this, pOSSaveReader, fileHeader.m_attrNames );
				m_tableStrData.ReadFromFile( *this, pOSSaveReader, fileHeader.m_strData );
				m_tableAttrSets.ReadFromFile( *this, pOSSaveReader, fileHeader );
				CreateNodeAddressTables();
			}
			
			if (!m_errorReading)
			{
				const CNodeLiveReader& root = ActivateLiveNodeFromCompact( m_numNodes - 1 ); // the last node is always the root
				assert( root.GetLiveId()==XMLCPB_ROOTNODE_ID );

				pOSSaveReader->TouchFile();
			}
		}	

		pOSSaveReader->Close();
	}
	
	CryLog("[LOAD GAME] --Binary saveload: reading done--");
		
	if (m_errorReading)
		CryWarning( VALIDATOR_MODULE_SYSTEM, VALIDATOR_ERROR, "XMLCPB ERROR: while reading the file: '%s'", pFileName );

	return !m_errorReading;
}