Method Finalize

cpp/src/Msg.cpp:159–202

----------------------------------------------------------------------------- Fill in the length and checksum values for the message -----------------------------------------------------------------------------

// Fill in the length and checksum values for the message
//-----------------------------------------------------------------------------
void Msg::Finalize()
{
	if( m_bFinal )
	{
		// Already finalized
		return;
	}

	// Deal with Multi-Channel/Instance encapsulation
	if( ( m_flags & ( m_MultiChannel | m_MultiInstance ) ) != 0 )
	{
		MultiEncap();
	}

	// Add the callback id
	if( m_bCallbackRequired )
	{
		// Set the length byte
		m_buffer[1] = m_length;		// Length of following data

		if( 0 == s_nextCallbackId )
		{
			s_nextCallbackId = 10;
		}

		m_buffer[m_length++] = s_nextCallbackId;
		m_callbackId = s_nextCallbackId++;
	}
	else
	{
		// Set the length byte
		m_buffer[1] = m_length - 1;		// Length of following data
	}

	// Calculate the checksum
	uint8 checksum = 0xff;
	for( uint32 i=1; i<m_length; ++i )
	{
		checksum ^= m_buffer[i];
	}
	m_buffer[m_length++] = checksum;

	m_bFinal = true;
}


//-----------------------------------------------------------------------------