/*
* lftp - file transfer program
*
* Copyright (c) 1996-2012 by Alexander V. Lukyanov (lav@yars.free.net)
*
* This program 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 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef REF_H
#define REF_H
template<typename T> class Ref
{
Ref<T>(const Ref<T>&); // disable cloning
void operator=(const Ref<T>&); // and assignment
protected:
T *ptr;
public:
Ref<T>() { ptr=0; }
Ref<T>(T *p) { ptr=p; }
~Ref<T>() { delete ptr; }
void operator=(T *p) { delete ptr; ptr=p; }
operator const T*() const { return ptr; }
T *operator->() const { return ptr; }
T *borrow() { return replace_value(ptr,(T*)0); }
const T *get() const { return ptr; }
T *get_non_const() const { return ptr; }
template<class C> const Ref<C>& Cast() const
{ void(static_cast<C*>(ptr)); return *(const Ref<C>*)this; }
static const Ref<T> null;
void _set(T *p) { ptr=p; }
void _clear() { ptr=0; }
void unset() { *this=0; }
};
template<typename T> const Ref<T> Ref<T>::null;
template<typename T> class RefToArray : public Ref<T>
{
RefToArray<T>(const RefToArray<T>&); // disable cloning
void operator=(const RefToArray<T>&); // and assignment
public:
RefToArray<T>() {}
RefToArray<T>(T *p) : Ref<T>(p) {}
~RefToArray<T>() { delete[] Ref<T>::ptr; Ref<T>::ptr=0; }
void operator=(T *p) { delete[] Ref<T>::ptr; Ref<T>::ptr=p; }
T& operator[](unsigned i) const { return Ref<T>::ptr[i]; }
static const RefToArray<T> null;
};
template<typename T> const RefToArray<T> RefToArray<T>::null;
#endif