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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 "net/messageout.h"
#include "net/messagein.h"
#include <cstring>
#include <iomanip>
#include <iostream>
#ifndef USE_NATIVE_DOUBLE
#include <limits>
#include <sstream>
#endif
#include <stdint.h>
#include <string>
#include <enet/enet.h>
/** Initial amount of bytes allocated for the messageout data buffer. */
const unsigned INITIAL_DATA_CAPACITY = 16;
/** Factor by which the messageout data buffer is increased when too small. */
const unsigned CAPACITY_GROW_FACTOR = 2;
static bool debugModeEnabled = false;
MessageOut::MessageOut(int id):
mPos(0),
mDebugMode(false)
{
mData = (char*) malloc(INITIAL_DATA_CAPACITY);
mDataSize = INITIAL_DATA_CAPACITY;
if (debugModeEnabled)
id |= ManaServ::XXMSG_DEBUG_FLAG;
writeInt16(id);
mDebugMode = debugModeEnabled;
}
MessageOut::~MessageOut()
{
free(mData);
}
void MessageOut::expand(size_t bytes)
{
if (bytes > mDataSize)
{
do
{
mDataSize *= CAPACITY_GROW_FACTOR;
}
while (bytes > mDataSize);
mData = (char*) realloc(mData, mDataSize);
}
}
void MessageOut::writeInt8(int value)
{
if (mDebugMode)
writeValueType(ManaServ::Int8);
expand(mPos + 1);
mData[mPos] = value;
mPos += 1;
}
void MessageOut::writeInt16(int value)
{
if (mDebugMode)
writeValueType(ManaServ::Int16);
expand(mPos + 2);
uint16_t t = ENET_HOST_TO_NET_16(value);
memcpy(mData + mPos, &t, 2);
mPos += 2;
}
void MessageOut::writeInt32(int value)
{
if (mDebugMode)
writeValueType(ManaServ::Int32);
expand(mPos + 4);
uint32_t t = ENET_HOST_TO_NET_32(value);
memcpy(mData + mPos, &t, 4);
mPos += 4;
}
void MessageOut::writeDouble(double value)
{
if (mDebugMode)
writeValueType(ManaServ::Double);
#ifdef USE_NATIVE_DOUBLE
expand(mPos + sizeof(double));
memcpy(mData + mPos, &value, sizeof(double));
mPos += sizeof(double);
#else
// Rather inefficient, but I don't have a lot of time.
// If anyone wants to implement a custom double you are more than welcome to.
std::ostringstream o;
// Highest precision for double
o.precision(std::numeric_limits< double >::digits10);
o << value;
std::string str = o.str();
writeInt8(str.size());
writeString(str, str.size());
#endif
}
void MessageOut::writeString(const std::string &string, int length)
{
if (mDebugMode)
{
writeValueType(ManaServ::String);
writeInt16(length);
}
int stringLength = string.length();
if (length < 0)
{
// Write the length at the start if not fixed
writeInt16(stringLength);
length = stringLength;
}
else if (length < stringLength)
{
// Make sure the length of the string is no longer than specified
stringLength = length;
}
expand(mPos + length);
// Write the actual string
memcpy(mData + mPos, string.data(), stringLength);
if (length > stringLength)
{
// Pad remaining space with zeros
memset(mData + mPos + stringLength, '\0', length - stringLength);
}
mPos += length;
}
void MessageOut::writeValueType(ManaServ::ValueType type)
{
expand(mPos + 1);
mData[mPos] = type;
mPos += 1;
}
std::ostream&
operator <<(std::ostream &os, const MessageOut &msg)
{
if (msg.getLength() >= 2)
{
MessageIn m(msg.mData, msg.mPos);
os << m;
}
else
{
os << "Unknown"
<< std::dec << " (" << msg.getLength() << " B)";
}
return os;
}
void MessageOut::setDebugModeEnabled(bool enabled)
{
debugModeEnabled = enabled;
}
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