/* $Id: tcpconnection.hpp,v 1.6 2005/12/06 21:31:52 chfreund Exp $ */

#ifndef _TCPCONNECTION_HPP_
#define _TCPCONNECTION_HPP_

#include <SDL_types.h>
#include <SDL_net.h>
#include "message.hpp"

#if SDL_BYTEORDER == SDL_LIL_ENDIAN
#define ENCODE_IP(a,b,c,d) (((((((d) << 8) + (c)) << 8) + (b)) << 8) + (a))
#define DECODE_IP(h) (255 & h), (255 & ((h) >> 8)), \
                 (255 & ((h) >> 16)), (255 & ((h) >> 24))
#else // SDL_BYTEORDER == SDL_BIG_ENDIAN
#define ENCODE_IP(a,b,c,d) (((((((a) << 8) + (b)) << 8) + (c)) << 8) + (d))
#define DECODE_IP(h) (255 & ((h) >> 24)), (255 & ((h) >> 16)), \
                     (255 & ((h) >> 8)), (255 & h)
#endif

class TCPProgressListener {
public:
	virtual ~TCPProgressListener() { }
	virtual void sendProgress( Sint32 size, Sint32 sent ) = 0;
	virtual void recvProgress( Sint32 size, Sint32 received ) = 0;
};

/*! \brief Class for TCP connections
 *
 *  This class provides the functions sendMessage() and recvMessage()
 *  for easy communication
 */

class TCPConnection {
	public:
		/*! \brief Send a message over the given TCP socket
		 *  \param socket The TCP socket over which the data is to be sent
		 *  \param packet Pointer to the message to be sent
		 *  \return 0 on success, -1 on failure
		 */ 
		static int sendMessage( TCPsocket socket, Message* message,
		                        bool compressData = false,
		                        TCPProgressListener* listener = 0 );
		/*! \brief Receive a message over the given TCP socket
		 *  \param socket The TCP socket for the reception of the packet
		 *  \param message Message pointer which points to the received
		 *    message or is 0 if no message could be received
		 *  \return -1 on errors, 0 else
		 *  \note The received message is allocated dynamically so it has to be
		 *    deleted when it is no longer used.
		 */
		static int recvMessage( TCPsocket socket, Message*& message,
		                        TCPProgressListener* listener = 0 );
};

#endif // _TCPCONNECTION_HPP_