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/*
* The Mana Client
* Copyright (C) 2004-2010 The Mana World Development Team
*
* This file is part of The Mana 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/>.
*/
#include "net/ea/messageout.h"
#include "net/ea/network.h"
#include <SDL.h>
#include <SDL_endian.h>
#include <cstring>
#include <string>
namespace EAthena {
MessageOut::MessageOut(short id):
Net::MessageOut(id)
{
mNetwork = EAthena::Network::instance();
mData = mNetwork->mOutBuffer + mNetwork->mOutSize;
writeInt16(id);
}
void MessageOut::expand(size_t bytes)
{
mNetwork->mOutSize += bytes;
}
void MessageOut::writeInt16(Sint16 value)
{
expand(2);
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
Sint16 swap=SDL_Swap16(value);
memcpy(mData + mPos, &swap, sizeof(Sint16));
#else
memcpy(mData + mPos, &value, sizeof(Sint16));
#endif
mPos += 2;
}
void MessageOut::writeInt32(Sint32 value)
{
expand(4);
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
Sint32 swap=SDL_Swap32(value);
memcpy(mData + mPos, &swap, sizeof(Sint32));
#else
memcpy(mData + mPos, &value, sizeof(Sint32));
#endif
mPos += 4;
}
#define LOBYTE(w) ((unsigned char)(w))
#define HIBYTE(w) ((unsigned char)(((unsigned short)(w)) >> 8))
void MessageOut::writeCoordinates(unsigned short x, unsigned short y,
unsigned char direction)
{
char *data = mData + mPos;
mNetwork->mOutSize += 3;
mPos += 3;
short temp;
temp = x;
temp <<= 6;
data[0] = 0;
data[1] = 1;
data[2] = 2;
data[0] = HIBYTE(temp);
data[1] = (unsigned char) temp;
temp = y;
temp <<= 4;
data[1] |= HIBYTE(temp);
data[2] = LOBYTE(temp);
// Translate direction to eAthena format
switch (direction)
{
case 1:
direction = 0;
break;
case 3:
direction = 1;
break;
case 2:
direction = 2;
break;
case 6:
direction = 3;
break;
case 4:
direction = 4;
break;
case 12:
direction = 5;
break;
case 8:
direction = 6;
break;
case 9:
direction = 7;
break;
default:
// OOPSIE! Impossible or unknown
direction = (unsigned char) -1;
}
data[2] |= direction;
}
}
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