mirror of https://github.com/TTimo/GtkRadiant.git
150 lines
2.9 KiB
C++
150 lines
2.9 KiB
C++
/*
|
|
Copyright (C) 2001-2006, William Joseph.
|
|
All Rights Reserved.
|
|
|
|
This file is part of GtkRadiant.
|
|
|
|
GtkRadiant 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
|
|
(at your option) any later version.
|
|
|
|
GtkRadiant 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 GtkRadiant; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#if !defined(INCLUDED_TYPESYSTEM_H)
|
|
#define INCLUDED_TYPESYSTEM_H
|
|
|
|
|
|
#include <list>
|
|
#include "generic/callback.h"
|
|
#include "generic/static.h"
|
|
|
|
class InitialiserList
|
|
{
|
|
typedef std::list<Callback> Initialisers;
|
|
Initialisers m_initialisers;
|
|
mutable bool m_initialised;
|
|
public:
|
|
InitialiserList() : m_initialised(false)
|
|
{
|
|
}
|
|
void addInitialiser(const Callback& callback)
|
|
{
|
|
m_initialisers.push_back(callback);
|
|
}
|
|
void initialise() const
|
|
{
|
|
if(!m_initialised)
|
|
{
|
|
m_initialised = true;
|
|
|
|
for(Initialisers::const_iterator i = m_initialisers.begin(); i != m_initialisers.end(); ++i)
|
|
{
|
|
(*i)();
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
//--Type System-------------------
|
|
|
|
class TypeSystemInitialiser : public InitialiserList
|
|
{
|
|
};
|
|
|
|
typedef SmartStatic<TypeSystemInitialiser> StaticTypeSystemInitialiser;
|
|
|
|
class TypeSystemRef : public StaticTypeSystemInitialiser
|
|
{
|
|
public:
|
|
TypeSystemRef()
|
|
{
|
|
StaticTypeSystemInitialiser::instance().initialise();
|
|
}
|
|
};
|
|
|
|
|
|
|
|
typedef std::size_t TypeId;
|
|
typedef void*(*TypeCast)(void*);
|
|
|
|
template<std::size_t SIZE>
|
|
class TypeCastTable
|
|
{
|
|
TypeCast m_casts[SIZE];
|
|
public:
|
|
TypeCastTable()
|
|
{
|
|
std::uninitialized_fill(m_casts, m_casts + SIZE, TypeCast(0));
|
|
}
|
|
void install(TypeId typeId, TypeCast typeCast)
|
|
{
|
|
m_casts[typeId] = typeCast;
|
|
}
|
|
void* cast(TypeId typeId, void* p)
|
|
{
|
|
TypeCast typeCast = m_casts[typeId];
|
|
if(typeCast != 0)
|
|
{
|
|
return typeCast(p);
|
|
}
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
template<typename Type, typename Cast>
|
|
class CastInstaller
|
|
{
|
|
public:
|
|
static void install(TypeCastTable<Type::SIZE>& table)
|
|
{
|
|
table.install(Type::getTypeId(), Cast::cast);
|
|
}
|
|
};
|
|
|
|
template<typename Type>
|
|
class IdentityCast
|
|
{
|
|
public:
|
|
static void* cast(void* p)
|
|
{
|
|
return p;
|
|
}
|
|
};
|
|
|
|
template<typename Type, typename Base>
|
|
class StaticCast
|
|
{
|
|
public:
|
|
static void* cast(void* p)
|
|
{
|
|
return static_cast<Base*>(reinterpret_cast<Type*>(p));
|
|
}
|
|
};
|
|
|
|
template<typename Type>
|
|
class NullType
|
|
{
|
|
};
|
|
|
|
template<typename Type, typename Contained>
|
|
class ContainedCast
|
|
{
|
|
public:
|
|
static void* cast(void* p)
|
|
{
|
|
return &reinterpret_cast<Type*>(p)->get(NullType<Contained>());
|
|
}
|
|
};
|
|
|
|
|
|
#endif
|