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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 *p)
{
pos = 0;
packet = p;
}
MessageIn::~MessageIn()
{
delete packet; // To be removed if the packet is deleted elsewhere.
}
char MessageIn::readByte()
{
if (packet) // if Packet exists
{
if ( pos < packet->length ) // if there is enough to read
{
return packet->data[pos++];
}
else
{
pos = packet->length - 1;
return 0;
}
}
return -1;
}
short MessageIn::readShort()
{
if (packet) // if Packet exists
{
if ( (pos + sizeof(short)) <= packet->length )
{
pos += sizeof(short);
return (short) SDLNet_Read16(&(packet->data[pos - 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 (packet) // if Packet exists
{
if ( (pos + sizeof(long)) <= packet->length )
{
pos += sizeof(long);
return (long) SDLNet_Read32(&(packet->data[pos - 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)
{
if (packet) // If there a good packet
{
int stringLength = 0;
std::string readString = "";
if ( length != -1 ) // if the length isn't specified, read it in the packet
{
// If the length of the packet is sufficient for us to read the length of the string
if ( (pos + sizeof(short)) <= packet->length )
{
// We first read the length of the string given by the short before it.
stringLength = (short)SDLNet_Read16(&(packet->data[pos]));
pos += sizeof(short);
}
else
{
// Place us to the end as the size is a short
pos = packet->length;
}
}
else // if the length is specified
{
stringLength = length;
}
if ( stringLength > 0 )
{
if ( (pos + stringLength) <= packet->length ) // If there's enough length to copy
{
char tempChar[stringLength+1];
memcpy(&tempChar, packet->data, stringLength);
readString = tempChar; // We first copy the entire char array
// And then, we copy from the pos
// to the stringLength.
readString = readString.substr(pos,stringLength);
pos += stringLength;
}
else // if there isn't, copy till the end
{
char tempChar[packet->length +1];
memcpy(&tempChar, packet->data, packet->length - 1);
readString = tempChar; // We first copy the entire char array
// And then, we copy from the pos
// to the length - 1 of the string.
readString = readString.substr(pos,packet->length - 1 - pos);
pos = packet->length - 1;
}
}
else
{
// The length of the string is zero ?
}
} // End if there is a packet
return "";
}
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