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INFPacket.cpp
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/*-----------------------------------------------------------------------------\
| ____ |
| __ / __ \ /\ /\ |
| /_/ / / \/ / / / / |
| __ ____ / /_ ____ ____ ____ / / / / |
| / / / __ \ / ___\ / __ \ / __ \ / __ \ / / / / /\ /\|
| / / / / \ \ / / / / \/ / / \ \ / ____/ / / / / / / / /|
| / /_ / / / / / / / / \ \__/ /_ \ \___ / /_ / /_ \ \/ / |
| \__/ \/ \/ \/ \/ \______/ \____/ \__/ \__/ \ / |
| / / |
| ______________________________________________________________________/ / |
|/ ____________________________________________________________________/ |
|\__/ |
| |
| |
| Infraelly MMORPG |
| Copyright (C) 2007-2010 Tony Huynh aka insanepotato |
| |
| Visit: http://sourceforge.net/projects/infraelly/ |
| |
| License: (LGPL) |
| This is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public |
| License as published by the Free Software Foundation; either |
| version 2 of the License, or (at your option) any later version. |
| |
| This 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 |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public |
| License along with this library; if not, write to the Free |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| |
| Tony Huynh |
| |
L-----------------------------------------------------------------------------*/
#include "INFPacket.hpp"
#include <iostream>
namespace inp{
INFPacket::INFPacket() : readIndex(0) { data.reserve(maxSendSize); }
INFPacket::~INFPacket(){ ; }
size_t INFPacket::getLength()const{ return data.size(); }
void INFPacket::clear(){ readIndex = 0; data.clear(); }
NetCode peekTypeVar(const INFPacket& src){
if( src.data.empty() ){ return ControlByte::NOTHING; }
return src.data[src.readIndex];
}
INFPacket& operator<<(INFPacket& dest, const INFPacket& source){
dest.data.insert( dest.data.end(), source.data.begin(), source.data.end() );
return dest;
}
/* INFPacket& operator<<(INFPacket& dest, const bool val){
// Data type
dest.data.push_back( VarTypeByte::B8.getVal() );
// Data
dest.data.push_back( static_cast<Uint8>(val) );
return dest;
}*/
INFPacket& operator<<(INFPacket& dest, const NetCode& code){
dest.data.push_back( code.getVal() );
return dest;
}
INFPacket& operator<<(INFPacket& dest, const Uint8 val){
// Data type
dest.data.push_back( VarTypeByte::U8.getVal() );
// Data
dest.data.push_back( val );
return dest;
}
INFPacket& operator<<(INFPacket& dest, const Sint8 val){
// Data type
dest.data.push_back( VarTypeByte::S8.getVal() );
// Data
dest.data.push_back( val );
return dest;
}
INFPacket& operator<<(INFPacket& dest, const Uint16 val){
// Data type
dest.data.push_back( VarTypeByte::U16.getVal() );
// Data
Uint8 tmp[2] = {0,0};
SDLNet_Write16(static_cast<Uint16>(val), tmp);
dest.data.push_back( tmp[0] );
dest.data.push_back( tmp[1] );
return dest;
}
INFPacket& operator<<(INFPacket& dest, const Sint16 val){
// Data type
dest.data.push_back( VarTypeByte::S16.getVal() );
// Data
Uint8 tmp[2] = {0,0};
SDLNet_Write16(static_cast<Uint16>(val), tmp);
dest.data.push_back( tmp[0] );
dest.data.push_back( tmp[1] );
return dest;
}
INFPacket& operator<<(INFPacket& dest, const Uint32 val){
// Data type
dest.data.push_back( VarTypeByte::U32.getVal() );
// Data
Uint8 tmp[4] = {0,0,0,0};
SDLNet_Write32(static_cast<Uint32>(val), tmp);
dest.data.push_back( tmp[0] );
dest.data.push_back( tmp[1] );
dest.data.push_back( tmp[2] );
dest.data.push_back( tmp[3] );
return dest;
}
INFPacket& operator<<(INFPacket& dest, const Sint32 val){
// Data type
dest.data.push_back( VarTypeByte::S32.getVal() );
// Data
Uint8 tmp[4] = {0,0,0,0};
SDLNet_Write32(static_cast<Uint32>(val), tmp);
dest.data.push_back( tmp[0] );
dest.data.push_back( tmp[1] );
dest.data.push_back( tmp[2] );
dest.data.push_back( tmp[3] );
return dest;
}
INFPacket& operator<<(INFPacket& dest, const std::string& str){
// Data type
dest.data.push_back( VarTypeByte::STR.getVal() );
// String length
Uint8 tmp[2] = {0,0};
SDLNet_Write16(static_cast<Uint16>(str.length()), tmp);
dest.data.push_back( tmp[0] );
dest.data.push_back( tmp[1] );
// Data
for( std::string::size_type i = 0; i < str.length(); ++i ){
dest.data.push_back( static_cast<Uint8>(str[i]) );
}
return dest;
}
INFPacket& operator<<(INFPacket& dest, const float val){
// Data type
dest.data.push_back( VarTypeByte::FPN.getVal() );
Sint32 mantissa = static_cast<Sint32>(val);
float quotient = val;
if( val > 0 ){
if( mantissa != 0 ){
quotient -= mantissa;
}
} else {
quotient *= -1;
quotient += mantissa;
}
Uint32 encodeQuotient = floatToInt(quotient);
//multiply by -1
if( (mantissa == 0) && (val < 0) ){
dest << static_cast<Uint8>(true);
} else {
dest << static_cast<Uint8>(false);
}
dest << mantissa;
dest << encodeQuotient;
return dest;
}
std::ostream& operator<<(std::ostream& o, const INFPacket& p){
o << "Infraelly Packet Dump" << std::endl;
o << "Index: " << p.readIndex << std::endl;
for( unsigned int i = 0; i < p.data.size(); ++i ){
o << static_cast<unsigned int>(p.data[i]) << " ";
}
o << std::endl;
o << std::endl;
return o;
}
/*--------------------------------------------------------*/
/* Extraction opertators */
/*--------------------------------------------------------*/
void operator>>(INFPacket& src, NetCode& dest){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
dest = 0;
return;
}
//get code
dest.code = src.data[src.readIndex];
++src.readIndex;
}
void operator>>(INFPacket& src, bool& dest){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
dest = 0;
return;
}
//get type
NetCode typeCode = src.data[src.readIndex++];
//Extract data according to its true data type
// then cast it to the requested form
if( typeCode == VarTypeByte::B8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<bool>(src.data[src.readIndex]);
++src.readIndex;
} else
if( typeCode == VarTypeByte::U8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = src.data[src.readIndex];
++src.readIndex;
} else
if( typeCode == VarTypeByte::S8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
Sint8 tmp = static_cast<bool>(src.data[src.readIndex]);
if( tmp < 0 ){
dest = 0;
} else {
dest = tmp;
}
++src.readIndex;
} else
if( typeCode == VarTypeByte::U16){
//check if theres enough to read from the packet
if( (src.readIndex+2 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<bool>( SDLNet_Read16( &src.data[src.readIndex] ) );
src.readIndex += 2;
} else
if( typeCode == VarTypeByte::S16 ){
//check if theres enough to read from the packet
if( (src.readIndex+2 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
Sint16 tmp = static_cast<bool>( SDLNet_Read16( &src.data[src.readIndex] ) );
if( tmp < 0 ){
dest = 0;
} else {
dest = static_cast<bool>( tmp );
}
src.readIndex += 2;
} else
if( typeCode == VarTypeByte::U32 ){
//check if theres enough to read from the packet
if( (src.readIndex+4 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<bool>( SDLNet_Read32( &src.data[src.readIndex] ) );
src.readIndex += 4;
} else
if( typeCode == VarTypeByte::S32 ){
//check if theres enough to read from the packet
if( (src.readIndex+4 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
Sint32 tmp = static_cast<bool>( SDLNet_Read32( &src.data[src.readIndex] ) );
if( tmp < 0 ){
dest = 0;
} else {
dest = static_cast<bool>( tmp );
}
src.readIndex += 4;
} else
if( typeCode == VarTypeByte::FPN ){
if( (src.readIndex+12 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
Sint32 mantissa;
float quotient;
bool polarity;
src >> polarity;
src >> mantissa;
src >> quotient;
if( (mantissa < 0) || !polarity ){
dest = false;
} else {
dest = static_cast<bool>( mantissa );
}
} else {
std::cerr << __LINE__ << ": Packet data extraction type mismatch" << std::endl;
std::cerr << src;
src.clear();
dest = 0;
return;
}
return;
}
void operator>>(INFPacket& src, Uint8& dest){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
dest = 0;
return;
}
//get type
NetCode typeCode = src.data[src.readIndex++];
//Extract data according to its true data type
// then cast it to the requested form
if( typeCode == VarTypeByte::B8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<bool>(src.data[src.readIndex]);
++src.readIndex;
} else
if( typeCode == VarTypeByte::U8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = src.data[src.readIndex];
++src.readIndex;
} else
if( typeCode == VarTypeByte::S8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
Sint8 tmp = static_cast<Sint8>(src.data[src.readIndex]);
if( tmp < 0 ){
dest = 0;
} else {
dest = tmp;
}
++src.readIndex;
} else
if( typeCode == VarTypeByte::U16){
//check if theres enough to read from the packet
if( (src.readIndex+2 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<Uint8>( SDLNet_Read16( &src.data[src.readIndex] ) );
src.readIndex += 2;
} else
if( typeCode == VarTypeByte::S16){
//check if theres enough to read from the packet
if( (src.readIndex+2 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
Sint16 tmp = static_cast<Sint16>( SDLNet_Read16( &src.data[src.readIndex] ) );
if( tmp < 0 ){
dest = 0;
} else {
dest = static_cast<Uint8>( tmp );
}
src.readIndex += 2;
} else
if( typeCode == VarTypeByte::U32){
//check if theres enough to read from the packet
if( (src.readIndex+4 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<Uint8>( SDLNet_Read32( &src.data[src.readIndex] ) );
src.readIndex += 4;
} else
if( typeCode == VarTypeByte::S32){
//check if theres enough to read from the packet
if( (src.readIndex+4 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
Sint32 tmp = static_cast<Sint32>( SDLNet_Read32( &src.data[src.readIndex] ) );
if( tmp < 0 ){
dest = 0;
} else {
dest = static_cast<Uint8>( tmp );
}
src.readIndex += 4;
} else
if( typeCode == VarTypeByte::FPN ){
if( (src.readIndex+12 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
Sint32 mantissa;
float quotient;
bool polarity;
src >> polarity;
src >> mantissa;
src >> quotient;
if( (mantissa < 0) || !polarity ){
dest = 0;
} else {
dest = static_cast<Uint8>( mantissa );
}
} else {
std::cerr << __LINE__ << ": Packet data extraction type mismatch" << std::endl;
std::cerr << src;
src.clear();
dest = 0;
return;
}
return;
}
void operator>>(INFPacket& src, Sint8& dest){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
dest = 0;
return;
}
//get type
NetCode typeCode = src.data[src.readIndex++];
//Extract data according to its true data type
// then cast it to the requested form
if( typeCode == VarTypeByte::B8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<bool>(src.data[src.readIndex]);
++src.readIndex;
} else
if( typeCode == VarTypeByte::U8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = src.data[src.readIndex];
if( dest < 0 ){ dest = 0; }
++src.readIndex;
} else
if( typeCode == VarTypeByte::S8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<Sint8>(src.data[src.readIndex]);
++src.readIndex;
} else
if( typeCode == VarTypeByte::U16){
//check if theres enough to read from the packet
if( (src.readIndex+2 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<Uint8>( SDLNet_Read16( &src.data[src.readIndex] ) );
if( dest < 0 ){ dest = 0; }
src.readIndex += 2;
} else
if( typeCode == VarTypeByte::S16){
//check if theres enough to read from the packet
if( (src.readIndex+2 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<Sint8>( SDLNet_Read16( &src.data[src.readIndex] ) );
src.readIndex += 2;
} else
if( typeCode == VarTypeByte::U32){
//check if theres enough to read from the packet
if( (src.readIndex+4 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<Uint8>( SDLNet_Read32( &src.data[src.readIndex] ) );
if( dest < 0 ){ dest = 0; }
src.readIndex += 4;
} else
if( typeCode == VarTypeByte::S32){
//check if theres enough to read from the packet
if( (src.readIndex+4 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<Sint8>( SDLNet_Read32( &src.data[src.readIndex] ) );
src.readIndex += 4;
} else
if( typeCode == VarTypeByte::FPN ){
if( (src.readIndex+12 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
Sint32 mantissa;
float quotient;
bool polarity;
src >> polarity;
src >> mantissa;
src >> quotient;
dest = static_cast<Sint16>( mantissa );
if( (mantissa == 0) && !polarity ){
dest *= -1;
}
} else {
std::cerr << __LINE__ << ": Packet data extraction type mismatch" << std::endl;
std::cerr << src;
src.clear();
dest = 0;
return;
}
return;
}
void operator>>(INFPacket& src, Uint16& dest){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
dest = 0;
return;
}
//get type
NetCode typeCode = src.data[src.readIndex++];
//Extract data according to its true data type
// then cast it to the requested form
if( typeCode == VarTypeByte::B8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<bool>(src.data[src.readIndex]);
++src.readIndex;
} else
if( typeCode == VarTypeByte::U8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = src.data[src.readIndex];
++src.readIndex;
} else
if( typeCode == VarTypeByte::S8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
Sint8 tmp = static_cast<Sint8>(src.data[src.readIndex]);
if( tmp < 0 ){
dest = 0;
} else {
dest = tmp;
}
++src.readIndex;
} else
if( typeCode == VarTypeByte::U16){
//check if theres enough to read from the packet
if( (src.readIndex+2 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<Uint16>( SDLNet_Read16( &src.data[src.readIndex] ) );
src.readIndex += 2;
} else
if( typeCode == VarTypeByte::S16){
//check if theres enough to read from the packet
if( (src.readIndex+2 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
Sint16 tmp = static_cast<Sint16>( SDLNet_Read16( &src.data[src.readIndex] ) );
if( tmp < 0 ){
dest = 0;
} else {
dest = static_cast<Uint16>( tmp );
}
src.readIndex += 2;
} else
if( typeCode == VarTypeByte::U32){
//check if theres enough to read from the packet
if( (src.readIndex+4 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<Uint16>( SDLNet_Read32( &src.data[src.readIndex] ) );
src.readIndex += 4;
} else
if( typeCode == VarTypeByte::S32){
//check if theres enough to read from the packet
if( (src.readIndex+4 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
Sint32 tmp = static_cast<Sint32>( SDLNet_Read32( &src.data[src.readIndex] ) );
if( tmp < 0 ){
dest = 0;
} else {
dest = static_cast<Uint16>( tmp );
}
src.readIndex += 4;
} else
if( typeCode == VarTypeByte::FPN ){
if( (src.readIndex+12 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
Sint32 mantissa;
float quotient;
bool polarity;
src >> polarity;
src >> mantissa;
src >> quotient;
if( (mantissa < 0) || !polarity ){
dest = 0;
} else {
dest = static_cast<Uint16>( mantissa );
}
} else {
std::cerr << __LINE__ << ": Packet data extraction type mismatch" << std::endl;
std::cerr << src;
src.clear();
dest = 0;
return;
}
return;
}
void operator>>(INFPacket& src, Sint16& dest){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
dest = 0;
return;
}
//get type
NetCode typeCode = src.data[src.readIndex++];
//Extract data according to its true data type
// then cast it to the requested form
if( typeCode == VarTypeByte::B8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<bool>(src.data[src.readIndex]);
++src.readIndex;
} else
if( typeCode == VarTypeByte::U8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = src.data[src.readIndex];
++src.readIndex;
} else
if( typeCode == VarTypeByte::S8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<Sint8>(src.data[src.readIndex]);
++src.readIndex;
} else
if( typeCode == VarTypeByte::U16){
//check if theres enough to read from the packet
if( (src.readIndex+2 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<Uint16>( SDLNet_Read16( &src.data[src.readIndex] ) );
if( dest < 0 ){ dest = 0; }
src.readIndex += 2;
} else
if( typeCode == VarTypeByte::S16){
//check if theres enough to read from the packet
if( (src.readIndex+2 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<Sint16>( SDLNet_Read16( &src.data[src.readIndex] ) );
src.readIndex += 2;
} else
if( typeCode == VarTypeByte::U32){
//check if theres enough to read from the packet
if( (src.readIndex+4 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<Uint16>( SDLNet_Read32( &src.data[src.readIndex] ) );
if( dest < 0 ){ dest = 0; }
src.readIndex += 4;
} else
if( typeCode == VarTypeByte::S32){
//check if theres enough to read from the packet
if( (src.readIndex+4 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<Sint16>( SDLNet_Read32( &src.data[src.readIndex] ) );
src.readIndex += 4;
} else
if( typeCode == VarTypeByte::FPN ){
if( (src.readIndex+12 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
Sint32 mantissa;
float quotient;
bool polarity;
src >> polarity;
src >> mantissa;
src >> quotient;
dest = static_cast<Sint16>( mantissa );
if( (mantissa == 0) && !polarity ){
dest *= -1;
}
} else {
std::cerr << __LINE__ << ": Packet data extraction type mismatch" << std::endl;
std::cerr << src;
src.clear();
dest = 0;
return;
}
return;
}
void operator>>(INFPacket& src, Uint32& dest){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
dest = 0;
return;
}
//get type
NetCode typeCode = src.data[src.readIndex++];
//Extract data according to its true data type
// then cast it to the requested form
if( typeCode == VarTypeByte::B8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<bool>(src.data[src.readIndex]);
++src.readIndex;
} else
if( typeCode == VarTypeByte::U8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = src.data[src.readIndex];
++src.readIndex;
} else
if( typeCode == VarTypeByte::S8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
Sint8 tmp = static_cast<Sint8>(src.data[src.readIndex]);
if( tmp < 0 ){
dest = 0;
} else {
dest = tmp;
}
++src.readIndex;
} else
if( typeCode == VarTypeByte::U16){
//check if theres enough to read from the packet
if( (src.readIndex+2 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<Uint32>( SDLNet_Read16( &src.data[src.readIndex] ) );
src.readIndex += 2;
} else
if( typeCode == VarTypeByte::S16){
//check if theres enough to read from the packet
if( (src.readIndex+2 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
Sint16 tmp = static_cast<Sint16>( SDLNet_Read16( &src.data[src.readIndex] ) );
if( tmp < 0 ){
dest = 0;
} else {
dest = static_cast<Uint32>( tmp );
}
src.readIndex += 2;
} else
if( typeCode == VarTypeByte::U32){
//check if theres enough to read from the packet
if( (src.readIndex+4 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<Uint32>( SDLNet_Read32( &src.data[src.readIndex] ) );
src.readIndex += 4;
} else
if( typeCode == VarTypeByte::S32){
//check if theres enough to read from the packet
if( (src.readIndex+4 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
Sint32 tmp = static_cast<Sint32>( SDLNet_Read32( &src.data[src.readIndex] ) );
if( tmp < 0 ){
dest = 0;
} else {
dest = static_cast<Uint32>( tmp );
}
src.readIndex += 4;
} else
if( typeCode == VarTypeByte::FPN ){
if( (src.readIndex+12 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
Sint32 mantissa;
float quotient;
bool polarity;
src >> polarity;
src >> mantissa;
src >> quotient;
if( (mantissa < 0) || !polarity ){
dest = 0;
} else {
dest = static_cast<Uint32>( mantissa );
}
} else {
std::cerr << __LINE__ << ": Packet data extraction type mismatch" << std::endl;
std::cerr << src;
src.clear();
dest = 0;
return;
}
return;
}
void operator>>(INFPacket& src, Sint32& dest){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
dest = 0;
return;
}
//get type
NetCode typeCode = src.data[src.readIndex++];
//Extract data according to its true data type
// then cast it to the requested form
if( typeCode == VarTypeByte::B8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<bool>(src.data[src.readIndex]);
++src.readIndex;
} else
if( typeCode == VarTypeByte::U8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = src.data[src.readIndex];
++src.readIndex;
} else
if( typeCode == VarTypeByte::S8){
//check if theres enough to read from the packet
if( (src.readIndex+1 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<Sint32>( src.data[src.readIndex] );
++src.readIndex;
} else
if( typeCode == VarTypeByte::U16){
//check if theres enough to read from the packet
if( (src.readIndex+2 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}
dest = static_cast<Uint32>( SDLNet_Read16( &src.data[src.readIndex] ) );
src.readIndex += 2;
} else
if( typeCode == VarTypeByte::S16){
//check if theres enough to read from the packet
if( (src.readIndex+2 > src.data.size()) || src.data.empty() ){
src.clear();
dest = 0;
return;
}