137 lines
2.9 KiB
C++
137 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 <vector>
|
|
#include "generic/callback.h"
|
|
#include "generic/static.h"
|
|
|
|
class InitialiserList
|
|
{
|
|
typedef std::list<Callback<void ()> > Initialisers;
|
|
Initialisers m_initialisers;
|
|
mutable bool m_initialised;
|
|
public:
|
|
InitialiserList() : m_initialised( false ){
|
|
}
|
|
void addInitialiser( const Callback<void()>& 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
|