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/*
* The Mana Server
* Copyright (C) 2004-2010 The Mana World Development Team
*
* This file is part of The Mana Server.
*
* The Mana Server 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 Server 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 Server. If not, see <http://www.gnu.org/licenses/>.
*/
#include <cstring>
#include <iomanip>
#include <iostream>
#include <string>
#include <enet/enet.h>
#ifndef USE_NATIVE_DOUBLE
#include <sstream>
#endif
#include "net/messagein.h"
#include "utils/logger.h"
MessageIn::MessageIn(const char *data, int length):
mData(data),
mLength(length),
mPos(0)
{
// Read the message ID
mId = readInt16();
}
int MessageIn::readInt8()
{
int value = -1;
if (mPos < mLength)
{
value = (unsigned char) mData[mPos];
}
else LOG_DEBUG("Unable to read 1 byte in " << this->getId() << "!");
mPos += 1;
return value;
}
int MessageIn::readInt16()
{
int value = -1;
if (mPos + 2 <= mLength)
{
uint16_t t;
memcpy(&t, mData + mPos, 2);
value = (unsigned short) ENET_NET_TO_HOST_16(t);
}
else LOG_DEBUG("Unable to read 2 bytes in " << this->getId() << "!");
mPos += 2;
return value;
}
int MessageIn::readInt32()
{
int value = -1;
if (mPos + 4 <= mLength)
{
uint32_t t;
memcpy(&t, mData + mPos, 4);
value = ENET_NET_TO_HOST_32(t);
}
else LOG_DEBUG("Unable to read 4 bytes in " << this->getId() << "!");
mPos += 4;
return value;
}
double MessageIn::readDouble()
{
double value;
#ifdef USE_NATIVE_DOUBLE
if (mPos + sizeof(double) <= mLength)
memcpy(&value, mData + mPos, sizeof(double));
mPos += sizeof(double);
#else
int length = readInt8();
std::istringstream i (readString(length));
i >> value;
#endif
return value;
}
std::string MessageIn::readString(int length)
{
// Get string length
if (length < 0)
{
length = readInt16();
}
// Make sure the string isn't erroneous
if (length < 0 || mPos + length > mLength)
{
mPos = mLength + 1;
return std::string();
}
// Read the string
const char *stringBeg = mData + mPos;
const char *stringEnd = (const char *)memchr(stringBeg, '\0', length);
std::string readString(stringBeg,
stringEnd ? stringEnd - stringBeg : length);
mPos += length;
return readString;
}
std::ostream&
operator <<(std::ostream &os, const MessageIn &msg)
{
os << std::setw(6) << std::hex << std::showbase << std::internal
<< std::setfill('0') << msg.getId()
<< std::dec << " (" << msg.getLength() << " B)";
return os;
}
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