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/*
* The Mana World Server
* 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
*
* $Id$
*/
#include "messagein.h"
#include <SDL_net.h>
MessageIn::MessageIn(Packet *packet):
mPacket(packet),
mPos(0)
{
// Read the message ID
mId = readShort();
}
MessageIn::~MessageIn()
{
delete mPacket; // To be removed if the packet is deleted elsewhere.
}
char MessageIn::readByte()
{
if (mPacket)
{
if ( mPos < mPacket->length ) // if there is enough to read
{
return mPacket->data[mPos++];
}
else
{
mPos = mPacket->length - 1;
return 0;
}
}
return -1;
}
short MessageIn::readShort()
{
if (mPacket)
{
if ( (mPos + sizeof(short)) <= mPacket->length )
{
mPos += sizeof(short);
return (short) SDLNet_Read16(&(mPacket->data[mPos - sizeof(short)]));
}
else
{
// We do nothing. And keep what's left to be read by a function
// that requires less length.
}
}
return -1;
}
long MessageIn::readLong()
{
if (mPacket)
{
if ( (mPos + sizeof(long)) <= mPacket->length )
{
mPos += sizeof(long);
return (long) SDLNet_Read32(&(mPacket->data[mPos - sizeof(long)]));
}
else
{
// We do nothing. And keep what's left to be read by a function
// that requires less length.
}
}
return -1;
}
std::string MessageIn::readString(int length)
{
int stringLength = 0;
std::string readString = "";
if (mPacket)
{
// Get string length
if (length < 0) {
stringLength = readShort();
} else {
stringLength = length;
}
// Make sure the string isn't erroneus
if (mPos + length > mPacket->length) {
return "";
}
// Read the string
char *tmpString = new char[stringLength + 1];
memcpy(tmpString, (void*)&mPacket->data[mPos], stringLength);
tmpString[stringLength] = 0;
mPos += stringLength;
readString = tmpString;
delete tmpString;
}
return readString;
}
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