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////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2009 Laurent Gomila (laurent.gom@gmail.com)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
#ifndef SFML_PACKET_HPP
#define SFML_PACKET_HPP
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Config.hpp>
#include <string>
#include <vector>
namespace sf
{
////////////////////////////////////////////////////////////
/// Packet wraps data to send / to receive through the network
////////////////////////////////////////////////////////////
class SFML_API Packet
{
public :
////////////////////////////////////////////////////////////
/// Default constructor
///
////////////////////////////////////////////////////////////
Packet();
////////////////////////////////////////////////////////////
/// Virtual destructor
///
////////////////////////////////////////////////////////////
virtual ~Packet();
////////////////////////////////////////////////////////////
/// Append data to the end of the packet
///
/// \param Data : Pointer to the bytes to append
/// \param SizeInBytes : Number of bytes to append
///
////////////////////////////////////////////////////////////
void Append(const void* Data, std::size_t SizeInBytes);
////////////////////////////////////////////////////////////
/// Clear the packet data
///
////////////////////////////////////////////////////////////
void Clear();
////////////////////////////////////////////////////////////
/// Get a pointer to the data contained in the packet
/// Warning : the returned pointer may be invalid after you
/// append data to the packet
///
/// \return Pointer to the data
///
////////////////////////////////////////////////////////////
const char* GetData() const;
////////////////////////////////////////////////////////////
/// Get the size of the data contained in the packet
///
/// \return Data size, in bytes
///
////////////////////////////////////////////////////////////
std::size_t GetDataSize() const;
////////////////////////////////////////////////////////////
/// Tell if the reading position has reached the end of the packet
///
/// \return True if all data have been read into the packet
///
////////////////////////////////////////////////////////////
bool EndOfPacket() const;
////////////////////////////////////////////////////////////
/// Return the validity of packet
///
/// \return True if last data extraction from packet was successful
///
////////////////////////////////////////////////////////////
operator bool() const;
////////////////////////////////////////////////////////////
/// Operator >> overloads to extract data from the packet
///
////////////////////////////////////////////////////////////
Packet& operator >>(bool& Data);
Packet& operator >>(Int8& Data);
Packet& operator >>(Uint8& Data);
Packet& operator >>(Int16& Data);
Packet& operator >>(Uint16& Data);
Packet& operator >>(Int32& Data);
Packet& operator >>(Uint32& Data);
Packet& operator >>(float& Data);
Packet& operator >>(double& Data);
Packet& operator >>(char* Data);
Packet& operator >>(std::string& Data);
Packet& operator >>(wchar_t* Data);
Packet& operator >>(std::wstring& Data);
////////////////////////////////////////////////////////////
/// Operator << overloads to put data into the packet
///
////////////////////////////////////////////////////////////
Packet& operator <<(bool Data);
Packet& operator <<(Int8 Data);
Packet& operator <<(Uint8 Data);
Packet& operator <<(Int16 Data);
Packet& operator <<(Uint16 Data);
Packet& operator <<(Int32 Data);
Packet& operator <<(Uint32 Data);
Packet& operator <<(float Data);
Packet& operator <<(double Data);
Packet& operator <<(const char* Data);
Packet& operator <<(const std::string& Data);
Packet& operator <<(const wchar_t* Data);
Packet& operator <<(const std::wstring& Data);
private :
friend class SocketTCP;
friend class SocketUDP;
////////////////////////////////////////////////////////////
/// Check if the packet can extract a given size of bytes
///
/// \param Size : Size to check
///
/// \return True if Size bytes can be read from the packet's data
///
////////////////////////////////////////////////////////////
bool CheckSize(std::size_t Size);
////////////////////////////////////////////////////////////
/// Called before the packet is sent to the network
///
/// \param DataSize : Variable to fill with the size of data to send
///
/// \return Pointer to the array of bytes to send
///
////////////////////////////////////////////////////////////
virtual const char* OnSend(std::size_t& DataSize);
////////////////////////////////////////////////////////////
/// Called after the packet has been received from the network
///
/// \param Data : Pointer to the array of received bytes
/// \param DataSize : Size of the array of bytes
///
////////////////////////////////////////////////////////////
virtual void OnReceive(const char* Data, std::size_t DataSize);
////////////////////////////////////////////////////////////
// Member data
////////////////////////////////////////////////////////////
std::vector<char> myData; ///< Data stored in the packet
std::size_t myReadPos; ///< Current reading position in the packet
bool myIsValid; ///< Reading state of the packet
};
} // namespace sf
#endif // SFML_PACKET_HPP
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