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vcmi/lib/Connection.h
2009-12-01 22:14:25 +00:00

751 lines
17 KiB
C++

#ifndef __CONNECTION_H__
#define __CONNECTION_H__
#include "../global.h"
#include <string>
#include <vector>
#include <set>
#include <list>
#include <typeinfo> //XXX this is in namespace std if you want w/o use typeinfo.h?
#include <boost/type_traits/is_fundamental.hpp>
#include <boost/type_traits/is_enum.hpp>
#include <boost/type_traits/is_pointer.hpp>
#include <boost/type_traits/is_class.hpp>
#include <boost/type_traits/remove_pointer.hpp>
#include <boost/type_traits/is_base_of.hpp>
#include <boost/mpl/eval_if.hpp>
#include <boost/mpl/equal_to.hpp>
#include <boost/mpl/int.hpp>
#include <boost/mpl/identity.hpp>
#include <boost/type_traits/is_array.hpp>
const ui32 version = 713;
class CConnection;
class CGObjectInstance;
class CGameState;
namespace mpl = boost::mpl;
/*
* Connection.h, part of VCMI engine
*
* Authors: listed in file AUTHORS in main folder
*
* License: GNU General Public License v2.0 or later
* Full text of license available in license.txt file, in main folder
*
*/
namespace boost
{
namespace asio
{
namespace ip
{
class tcp;
}
class io_service;
template <typename Protocol> class stream_socket_service;
template <typename Protocol,typename StreamSocketService>
class basic_stream_socket;
template <typename Protocol> class socket_acceptor_service;
template <typename Protocol,typename SocketAcceptorService>
class basic_socket_acceptor;
}
class mutex;
};
enum SerializationLvl
{
Wrong=0,
Primitive,
Array,
Pointer,
Serializable
};
struct TypeComparer
{
bool operator()(const std::type_info *a, const std::type_info *b) const
{
return a->before(*b);
}
};
class DLL_EXPORT CTypeList
{
typedef std::multimap<const std::type_info *,ui16,TypeComparer> TTypeMap;
TTypeMap types;
public:
CTypeList();
ui16 registerType(const std::type_info *type);
template <typename T> ui16 registerType(const T * t = NULL)
{
return registerType(getTypeInfo(t));
}
ui16 getTypeID(const std::type_info *type);
template <typename T> ui16 getTypeID(const T * t)
{
return getTypeID(getTypeInfo(t));
}
template <typename T> const std::type_info * getTypeInfo(const T * t = NULL)
{
if(t)
return &typeid(*t);
else
return &typeid(T);
}
};
extern DLL_EXPORT CTypeList typeList;
template<typename Ser,typename T>
struct SavePrimitive
{
static void invoke(Ser &s, const T &data)
{
s.savePrimitive(data);
}
};
template<typename Ser,typename T>
struct SaveSerializable
{
static void invoke(Ser &s, const T &data)
{
s.saveSerializable(data);
}
};
template<typename Ser,typename T>
struct LoadPrimitive
{
static void invoke(Ser &s, T &data)
{
s.loadPrimitive(data);
}
};
template<typename Ser,typename T>
struct SavePointer
{
static void invoke(Ser &s, const T &data)
{
s.savePointer(data);
}
};
template<typename Ser,typename T>
struct LoadPointer
{
static void invoke(Ser &s, T &data)
{
s.loadPointer(data);
}
};
template<typename Ser,typename T>
struct SaveArray
{
static void invoke(Ser &s, const T &data)
{
s.saveArray(data);
}
};
template<typename Ser,typename T>
struct LoadArray
{
static void invoke(Ser &s, T &data)
{
s.loadArray(data);
}
};
template<typename Ser,typename T>
struct LoadSerializable
{
static void invoke(Ser &s, T &data)
{
s.loadSerializable(data);
}
};
template<typename Ser,typename T>
struct SaveWrong
{
static void invoke(Ser &s, const T &data)
{
throw std::string("Wrong save serialization call!");
}
};
template<typename Ser,typename T>
struct LoadWrong
{
static void invoke(Ser &s, const T &data)
{
throw std::string("Wrong load serialization call!");
}
};
template<typename T>
struct SerializationLevel
{
typedef mpl::integral_c_tag tag;
typedef
typename mpl::eval_if<
boost::is_fundamental<T>,
mpl::int_<Primitive>,
//else
typename mpl::eval_if<
boost::is_class<T>,
mpl::int_<Serializable>,
//else
typename mpl::eval_if<
boost::is_array<T>,
mpl::int_<Array>,
//else
typename mpl::eval_if<
boost::is_pointer<T>,
mpl::int_<Pointer>,
//else
typename mpl::eval_if<
boost::is_enum<T>,
mpl::int_<Primitive>,
//else
mpl::int_<Wrong>
>
>
>
>
>::type type;
static const int value = SerializationLevel::type::value;
};
class DLL_EXPORT CSerializerBase
{
public:
};
class DLL_EXPORT CSaverBase : public virtual CSerializerBase
{
};
class CBasicPointerSaver
{
public:
virtual void savePtr(CSaverBase &ar, const void *data) const =0;
};
template <typename Serializer, typename T> class CPointerSaver : public CBasicPointerSaver
{
public:
void savePtr(CSaverBase &ar, const void *data) const
{
Serializer &s = static_cast<Serializer&>(ar);
const T *ptr = static_cast<const T*>(data);
//T is most derived known type, it's time to call actual serialize
const_cast<T&>(*ptr).serialize(s,version);
}
};
template <typename Serializer> class DLL_EXPORT COSer : public CSaverBase
{
public:
bool saving;
std::map<ui16,CBasicPointerSaver*> savers; // typeID => CPointerSaver<serializer,type>
COSer()
{
saving=true;
}
template<typename T> void registerType(const T * t=NULL)
{
ui16 ID = typeList.registerType(t);
savers[ID] = new CPointerSaver<COSer<Serializer>,T>;
}
Serializer * This()
{
return static_cast<Serializer*>(this);
}
template<class T>
Serializer & operator<<(const T &t)
{
this->This()->save(t);
return * this->This();
}
template<class T>
COSer & operator&(const T & t)
{
return * this->This() << t;
}
int write(const void * data, unsigned size);
template <typename T>
void savePrimitive(const T &data)
{
this->This()->write(&data,sizeof(data));
}
template <typename T>
void savePointer(const T &data)
{
//write if pointer is not NULL
ui8 hlp = (data!=NULL);
*this << hlp;
//if pointer is NULL then we don't need anything more...
if(!hlp)
return;
//write type identifier
ui16 tid = typeList.getTypeID(data);
*this << tid;
This()->savePointerHlp(tid, data);
}
//that part of ptr serialization was extracted to allow customization of its behavior in derived classes
template <typename T>
void savePointerHlp(ui16 tid, const T &data)
{
if(!tid)
*this << *data; //if type is unregistered simply write all data in a standard way
else
savers[tid]->savePtr(*this,data); //call serializer specific for our real type
}
template <typename T>
void saveArray(const T &data)
{
ui32 size = ARRAY_COUNT(data);
for(ui32 i=0; i < size; i++)
*this << data[i];
}
template <typename T>
void save(const T &data)
{
typedef
//if
typename mpl::eval_if< mpl::equal_to<SerializationLevel<T>,mpl::int_<Primitive> >,
mpl::identity<SavePrimitive<Serializer,T> >,
//else if
typename mpl::eval_if<mpl::equal_to<SerializationLevel<T>,mpl::int_<Pointer> >,
mpl::identity<SavePointer<Serializer,T> >,
//else if
typename mpl::eval_if<mpl::equal_to<SerializationLevel<T>,mpl::int_<Array> >,
mpl::identity<SaveArray<Serializer,T> >,
//else if
typename mpl::eval_if<mpl::equal_to<SerializationLevel<T>,mpl::int_<Serializable> >,
mpl::identity<SaveSerializable<Serializer,T> >,
//else
mpl::identity<SaveWrong<Serializer,T> >
>
>
>
>::type typex;
typex::invoke(* this->This(), data);
}
template <typename T>
void saveSerializable(const T &data)
{
const_cast<T&>(data).serialize(*this,version);
}
template <typename T>
void saveSerializable(const std::vector<T> &data)
{
boost::uint32_t length = data.size();
*this << length;
for(ui32 i=0;i<length;i++)
*this << data[i];
}
template <typename T>
void saveSerializable(const std::set<T> &data)
{
std::set<T> &d = const_cast<std::set<T> &>(data);
boost::uint32_t length = d.size();
*this << length;
for(typename std::set<T>::iterator i=d.begin();i!=d.end();i++)
*this << *i;
}
template <typename T>
void saveSerializable(const std::list<T> &data)
{
std::list<T> &d = const_cast<std::list<T> &>(data);
boost::uint32_t length = d.size();
*this << length;
for(typename std::list<T>::iterator i=d.begin();i!=d.end();i++)
*this << *i;
}
void saveSerializable(const std::string &data)
{
*this << ui32(data.length());
this->This()->write(data.c_str(),data.size());
}
template <typename T1, typename T2>
void saveSerializable(const std::pair<T1,T2> &data)
{
*this << data.first << data.second;
}
template <typename T1, typename T2>
void saveSerializable(const std::map<T1,T2> &data)
{
*this << ui32(data.size());
for(typename std::map<T1,T2>::const_iterator i=data.begin();i!=data.end();i++)
*this << i->first << i->second;
}
};
class DLL_EXPORT CLoaderBase : public virtual CSerializerBase
{};
class CBasicPointerLoader
{
public:
virtual void loadPtr(CLoaderBase &ar, void *data) const =0; //data is pointer to the ACTUAL POINTER
};
template <typename Serializer, typename T> class CPointerLoader : public CBasicPointerLoader
{
public:
void loadPtr(CLoaderBase &ar, void *data) const //data is pointer to the ACTUAL POINTER
{
Serializer &s = static_cast<Serializer&>(ar);
T *&ptr = *static_cast<T**>(data);
//create new object under pointer
typedef typename boost::remove_pointer<T>::type npT;
ptr = new npT;
//T is most derived known type, it's time to call actual serialize
ptr->serialize(s,version);
}
};
template <typename Serializer> class DLL_EXPORT CISer : public CLoaderBase
{
public:
bool saving;
std::map<ui16,CBasicPointerLoader*> loaders; // typeID => CPointerSaver<serializer,type>
ui32 myVersion;
CISer()
{
saving = false;
myVersion = version;
}
~CISer()
{
std::map<ui16,CBasicPointerLoader*>::iterator iter;
for(iter = loaders.begin(); iter != loaders.end(); iter++)
delete iter->second;
}
template<typename T> void registerType(const T * t=NULL)
{
ui16 ID = typeList.registerType(t);
loaders[ID] = new CPointerLoader<CISer<Serializer>,T>;
}
Serializer * This()
{
return static_cast<Serializer*>(this);
}
template<class T>
Serializer & operator>>(T &t)
{
this->This()->load(t);
return * this->This();
}
template<class T>
CISer & operator&(T & t)
{
return * this->This() >> t;
}
int write(const void * data, unsigned size);
template <typename T>
void load(T &data)
{
typedef
//if
typename mpl::eval_if< mpl::equal_to<SerializationLevel<T>,mpl::int_<Primitive> >,
mpl::identity<LoadPrimitive<Serializer,T> >,
//else if
typename mpl::eval_if<mpl::equal_to<SerializationLevel<T>,mpl::int_<Pointer> >,
mpl::identity<LoadPointer<Serializer,T> >,
//else if
typename mpl::eval_if<mpl::equal_to<SerializationLevel<T>,mpl::int_<Array> >,
mpl::identity<LoadArray<Serializer,T> >,
//else if
typename mpl::eval_if<mpl::equal_to<SerializationLevel<T>,mpl::int_<Serializable> >,
mpl::identity<LoadSerializable<Serializer,T> >,
//else
mpl::identity<LoadWrong<Serializer,T> >
>
>
>
>::type typex;
typex::invoke(* this->This(), data);
}
template <typename T>
void loadPrimitive(T &data)
{
this->This()->read(&data,sizeof(data));
}
template <typename T>
void loadSerializable(T &data)
{
////that const cast would be evil because it allows to implicitly overwrite const objects when deserializing
//typedef typename boost::remove_const<T>::type nonConstT;
//nonConstT &hlp = const_cast<nonConstT&>(data);
//hlp.serialize(*this,myVersion);
data.serialize(*this,myVersion);
}
template <typename T>
void loadArray(T &data)
{
ui32 size = ARRAY_COUNT(data);
for(ui32 i=0; i < size; i++)
*this >> data[i];
}
template <typename T>
void loadPointer(T &data)
{
ui8 hlp;
*this >> hlp;
if(!hlp)
{
data = NULL;
return;
}
//get type id
ui16 tid;
*this >> tid;
This()->loadPointerHlp(tid, data);
}
//that part of ptr deserialization was extracted to allow customization of its behavior in derived classes
template <typename T>
void loadPointerHlp( ui16 tid, T & data )
{
if(!tid)
{
typedef typename boost::remove_pointer<T>::type npT;
data = new npT;
*this >> *data;
}
else
{
loaders[tid]->loadPtr(*this,&data);
}
}
template <typename T>
void loadSerializable(std::vector<T> &data)
{
boost::uint32_t length;
*this >> length;
data.resize(length);
for(ui32 i=0;i<length;i++)
*this >> data[i];
}
template <typename T>
void loadSerializable(std::set<T> &data)
{
boost::uint32_t length;
*this >> length;
T ins;
for(ui32 i=0;i<length;i++)
{
*this >> ins;
data.insert(ins);
}
}
template <typename T>
void loadSerializable(std::list<T> &data)
{
boost::uint32_t length;
*this >> length;
T ins;
for(ui32 i=0;i<length;i++)
{
*this >> ins;
data.push_back(ins);
}
}
template <typename T1, typename T2>
void loadSerializable(std::pair<T1,T2> &data)
{
*this >> data.first >> data.second;
}
template <typename T1, typename T2>
void loadSerializable(std::map<T1,T2> &data)
{
ui32 length;
*this >> length;
T1 t;
for(ui32 i=0;i<length;i++)
{
*this >> t;
*this >> data[t];
}
}
void loadSerializable(std::string &data)
{
ui32 length;
*this >> length;
data.resize(length);
this->This()->read((void*)data.c_str(),length);
}
};
class DLL_EXPORT CSaveFile
: public COSer<CSaveFile>
{
void dummyMagicFunction()
{
*this << std::string("This function makes stuff working.");
}
public:
std::ofstream *sfile;
CSaveFile(const std::string &fname);
~CSaveFile();
int write(const void * data, unsigned size);
};
class DLL_EXPORT CLoadFile
: public CISer<CLoadFile>
{
void dummyMagicFunction()
{
std::string dummy = "This function makes stuff working.";
*this >> dummy;
}
public:
std::ifstream *sfile;
CLoadFile(const std::string &fname);
~CLoadFile();
int read(const void * data, unsigned size);
};
class DLL_EXPORT CConnection
:public CISer<CConnection>, public COSer<CConnection>
{
CGameState *gs;
CConnection(void);
void init();
public:
boost::mutex *rmx, *wmx; // read/write mutexes
boost::asio::basic_stream_socket < boost::asio::ip::tcp , boost::asio::stream_socket_service<boost::asio::ip::tcp> > * socket;
bool logging;
bool connected;
bool myEndianess, contactEndianess; //true if little endian, if ednianess is different we'll have to revert recieved multi-byte vars
boost::asio::io_service *io_service;
std::string name; //who uses this connection
CConnection
(std::string host, std::string port, std::string Name);
CConnection
(boost::asio::basic_socket_acceptor<boost::asio::ip::tcp, boost::asio::socket_acceptor_service<boost::asio::ip::tcp> > * acceptor,
boost::asio::io_service *Io_service, std::string Name);
CConnection
(boost::asio::basic_stream_socket < boost::asio::ip::tcp , boost::asio::stream_socket_service<boost::asio::ip::tcp> > * Socket,
std::string Name); //use immediately after accepting connection into socket
int write(const void * data, unsigned size);
int read(void * data, unsigned size);
int readLine(void * data, unsigned maxSize);
void close();
template<class T>
CConnection &operator&(const T&);
~CConnection(void);
void setGS(CGameState *state);
CGObjectInstance *loadObject(); //reads id from net and returns that obj
void saveObject(const CGObjectInstance *data);
template<typename T>
struct loadObjectHelper
{
static void invoke(CConnection &s, T &data, ui16 tid)
{
data = static_cast<T>(s.loadObject());
}
};
template<typename T>
struct loadRestHelper
{
static void invoke(CConnection &s, T &data, ui16 tid)
{
s.CISer<CConnection>::loadPointerHlp(tid, data);
}
};
template<typename T>
struct saveObjectHelper
{
static void invoke(CConnection &s, const T &data, ui16 tid)
{
//CGObjectInstance *&hlp = const_cast<CGObjectInstance*&>(data); //for loading pointer to const obj we must remove the qualifier
s.saveObject(data);
}
};
template<typename T>
struct saveRestHelper
{
static void invoke(CConnection &s, const T &data, ui16 tid)
{
s.COSer<CConnection>::savePointerHlp(tid, data);
}
};
//"overload" loading pointer procedure
template <typename T>
void loadPointerHlp( ui16 tid, T & data )
{
typedef typename
//if
mpl::eval_if< boost::is_base_of<CGObjectInstance, typename boost::remove_pointer<T>::type>,
mpl::identity<loadObjectHelper<T> >,
//else
mpl::identity<loadRestHelper<T> >
>::type typex;
typex::invoke(*this, data, tid);
}
//"overload" saving pointer procedure
template <typename T>
void savePointerHlp( ui16 tid, const T & data )
{
typedef typename
//if
mpl::eval_if< boost::is_base_of<CGObjectInstance, typename boost::remove_pointer<T>::type>,
mpl::identity<saveObjectHelper<T> >,
//else
mpl::identity<saveRestHelper<T> >
>::type typex;
typex::invoke(*this, data, tid);
}
};
#endif // __CONNECTION_H__