/*
* 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 .
*/
#ifndef REF_H
#define REF_H
template class Ref
{
Ref(const Ref&); // disable cloning
void operator=(const Ref&); // and assignment
protected:
T *ptr;
public:
Ref() { ptr=0; }
Ref(T *p) { ptr=p; }
~Ref() { 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 const Ref& Cast() const
{ void(static_cast(ptr)); return *(const Ref*)this; }
static const Ref null;
void _set(T *p) { ptr=p; }
void _clear() { ptr=0; }
void unset() { *this=0; }
};
template const Ref Ref::null;
template class RefToArray : public Ref
{
RefToArray(const RefToArray&); // disable cloning
void operator=(const RefToArray&); // and assignment
public:
RefToArray() {}
RefToArray(T *p) : Ref(p) {}
~RefToArray() { delete[] Ref::ptr; Ref::ptr=0; }
void operator=(T *p) { delete[] Ref::ptr; Ref::ptr=p; }
T& operator[](unsigned i) const { return Ref::ptr[i]; }
static const RefToArray null;
};
template const RefToArray RefToArray::null;
#endif