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/*
* The Mana World
* Copyright 2004 The Mana World Development Team
*
* This file is part of The Mana World.
*
* The Mana World is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* any later version.
*
* The Mana World is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with The Mana World; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id$
*/
#ifndef _TMW_MESSAGEOUT_
#define _TMW_MESSAGEOUT_
#include <iosfwd>
#include <SDL_types.h>
class Packet;
/**
* Used for building an outgoing message.
*/
class MessageOut
{
friend MessageOut& operator<<(MessageOut &msg, const Sint8 &rhs);
friend MessageOut& operator<<(MessageOut &msg, const Sint16 &rhs);
friend MessageOut& operator<<(MessageOut &msg, const Sint32 &rhs);
public:
/**
* Constructor.
*/
MessageOut();
/**
* Destructor.
*/
~MessageOut();
void writeInt8(Sint8 value); /**< Writes a byte. */
void writeInt16(Sint16 value); /**< Writes a short. */
void writeInt32(Sint32 value); /**< Writes a long. */
/**
* Writes a string. If a fixed length is not given (-1), it is stored
* as a short at the start of the string.
*/
void writeString(const std::string &string, int length = -1);
/**
* Returns an instance of Packet derived from the written data. Use for
* sending the packet. No more writing to the packet may be done after
* a call to this method.
*/
const Packet *getPacket();
private:
/**
* Expand the packet data to be able to hold more data.
*
* NOTE: For performance enhancements this method could allocate extra
* memory in advance instead of expanding size every time more data is
* added.
*/
void expand(size_t size);
Packet *mPacket; /**< Created packet. */
char *mData; /**< Data building up. */
unsigned int mDataSize; /**< Size of data. */
unsigned int mPos; /**< Position in the data. */
};
#endif
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