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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
*/
#ifndef _TMW_MESSAGEIN_
#define _TMW_MESSAGEIN_
#include <SDL_types.h>
#include <string>
/**
* Used for parsing an incoming message.
*/
class MessageIn
{
friend Sint8& operator<<(Sint8 &lhs, MessageIn &msg);
friend Sint16& operator<<(Sint16 &lhs, MessageIn &msg);
friend Sint32& operator<<(Sint32 &lhs, MessageIn &msg);
public:
/**
* Constructor.
*/
MessageIn(const char *data, unsigned int length);
/**
* Returns the message ID.
*/
short getId() { return mId; }
/**
* Returns the message length.
*/
unsigned int getLength() { return mLength; }
Sint8 readInt8(); /**< Reads a byte. */
Sint16 readInt16(); /**< Reads a short. */
Sint32 readInt32(); /**< Reads a long. */
/**
* Reads a special 3 byte block used by eAthena, containing x and y
* coordinates and direction.
*/
void readCoordinates(Uint16 &x, Uint16 &y, Uint8 &direction);
/**
* Reads a special 5 byte block used by eAthena, containing a source
* and destination coordinate pair.
*/
void readCoordinatePair(Uint16 &srcX, Uint16 &srcY,
Uint16 &dstX, Uint16 &dstY);
/**
* Skips a given number of bytes.
*/
void skip(unsigned int length);
/**
* Reads a string. If a length is not given (-1), it is assumed
* that the length of the string is stored in a short at the
* start of the string.
*/
std::string readString(int length = -1);
private:
const char* mData; /**< The message data. */
unsigned int mLength; /**< The length of the data. */
unsigned int mPos; /**< The position in the data. */
short mId; /**< The message ID. */
};
#endif
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