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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 <string>
#include <enet/enet.h>
#include "packet.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()
{
char value = -1;
if (mPacket)
{
if (mPos < mPacket->length)
{
value = mPacket->data[mPos];
}
mPos += 1;
}
return value;
}
short MessageIn::readShort()
{
short value = -1;
if (mPacket)
{
if (mPos + 2 <= mPacket->length)
{
uint16_t t;
memcpy(&t, mPacket->data + mPos, 2);
value = ENET_NET_TO_HOST_16(t);
}
mPos += 2;
}
return value;
}
long MessageIn::readLong()
{
long value = -1;
if (mPacket)
{
if (mPos + 4 <= mPacket->length)
{
uint32_t t;
memcpy(&t, mPacket->data + mPos, 4);
value = ENET_NET_TO_HOST_32(t);
}
mPos += 4;
}
return value;
}
std::string MessageIn::readString(int length)
{
if (mPacket)
{
// Get string length
if (length < 0) {
length = readShort();
}
// Make sure the string isn't erroneous
if (length < 0 || mPos + length > mPacket->length) {
mPos = mPacket->length + 1;
return "";
}
// Read the string
char const *stringBeg = mPacket->data + mPos;
char const *stringEnd = (char const *)memchr(stringBeg, '\0', length);
std::string readString(stringBeg,
stringEnd ? stringEnd - stringBeg : length);
mPos += length;
return readString;
}
return "";
}
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