/* * The ManaPlus Client * Copyright (C) 2004-2009 The Mana World Development Team * Copyright (C) 2009-2010 The Mana Developers * Copyright (C) 2011-2013 The ManaPlus Developers * * This file is part of The ManaPlus Client. * * This program 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. * * This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */ #ifndef NET_MESSAGEIN_H #define NET_MESSAGEIN_H #include <SDL_types.h> #include <string> #include "localconsts.h" namespace Net { /** * Used for parsing an incoming message. * * \ingroup Network */ class MessageIn { public: A_DELETE_COPY(MessageIn) /** * Returns the message ID. */ int getId() const A_WARN_UNUSED { return mId; } /** * Returns the message length. */ unsigned int getLength() const A_WARN_UNUSED { return mLength; } /** * Returns the length of unread data. */ unsigned int getUnreadLength() const A_WARN_UNUSED { return mLength > mPos ? mLength - mPos : 0; } virtual unsigned char readInt8(); /**< Reads a byte. */ virtual int16_t readInt16() = 0; /**< Reads a short. */ virtual int readInt32() = 0; /**< Reads a long. */ /** * Reads a 3-byte block containing tile-based coordinates. Used by * manaserv. */ virtual void readCoordinates(uint16_t &x, uint16_t &y); /** * Reads a special 3 byte block used by eAthena, containing x and y * coordinates and direction. */ virtual void readCoordinates(uint16_t &x, uint16_t &y, uint8_t &direction); /** * Reads a special 5 byte block used by eAthena, containing a source * and destination coordinate pair. */ virtual void readCoordinatePair(uint16_t &srcX, uint16_t &srcY, uint16_t &dstX, uint16_t &dstY); /** * Skips a given number of bytes. */ virtual void skip(const 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. */ virtual std::string readString(int length = -1); virtual std::string readRawString(int length); unsigned char *readBytes(int length); virtual ~MessageIn() { } static uint8_t fromServerDirection(const uint8_t serverDir) A_WARN_UNUSED; protected: /** * Constructor. */ MessageIn(const char *data, unsigned int length); const char *mData; /**< The message data. */ unsigned int mLength; /**< The length of the data. */ uint16_t mId; /**< The message ID. */ /** * Actual position in the packet. From 0 to packet->length. * A value bigger than packet->length means EOP was reached when * reading it. */ unsigned int mPos; }; } // namespace Net #endif // NET_MESSAGEIN_H