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/*
* This file is part of the DOM implementation for KDE.
* Copyright (C) 2005, 2006 Apple Computer, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef DocPtr_h
#define DocPtr_h
namespace WebCore {
template <class T> class DocPtr {
public:
DocPtr() : m_ptr(0) {}
DocPtr(T *ptr) : m_ptr(ptr) { if (ptr) ptr->selfOnlyRef(); }
DocPtr(const DocPtr &o) : m_ptr(o.m_ptr) { if (T *ptr = m_ptr) ptr->selfOnlyRef(); }
~DocPtr() { if (T *ptr = m_ptr) ptr->selfOnlyDeref(); }
template <class U> DocPtr(const DocPtr<U> &o) : m_ptr(o.get()) { if (T *ptr = m_ptr) ptr->selfOnlyRef(); }
void resetSkippingRef(T *o) { m_ptr = o; }
T *get() const { return m_ptr; }
T &operator*() const { return *m_ptr; }
T *operator->() const { return m_ptr; }
bool operator!() const { return !m_ptr; }
// this type conversion operator allows implicit conversion to
// bool but not to other integer types
typedef T * (DocPtr::*UnspecifiedBoolType)() const;
operator UnspecifiedBoolType() const
{
return m_ptr ? &DocPtr::get : 0;
}
DocPtr &operator=(const DocPtr &);
DocPtr &operator=(T *);
private:
T *m_ptr;
};
template <class T> DocPtr<T> &DocPtr<T>::operator=(const DocPtr<T> &o)
{
T *optr = o.m_ptr;
if (optr)
optr->selfOnlyRef();
if (T *ptr = m_ptr)
ptr->selfOnlyDeref();
m_ptr = optr;
return *this;
}
template <class T> inline DocPtr<T> &DocPtr<T>::operator=(T *optr)
{
if (optr)
optr->selfOnlyRef();
if (T *ptr = m_ptr)
ptr->selfOnlyDeref();
m_ptr = optr;
return *this;
}
template <class T> inline bool operator==(const DocPtr<T> &a, const DocPtr<T> &b)
{
return a.get() == b.get();
}
template <class T> inline bool operator==(const DocPtr<T> &a, const T *b)
{
return a.get() == b;
}
template <class T> inline bool operator==(const T *a, const DocPtr<T> &b)
{
return a == b.get();
}
template <class T> inline bool operator!=(const DocPtr<T> &a, const DocPtr<T> &b)
{
return a.get() != b.get();
}
template <class T> inline bool operator!=(const DocPtr<T> &a, const T *b)
{
return a.get() != b;
}
template <class T> inline bool operator!=(const T *a, const DocPtr<T> &b)
{
return a != b.get();
}
} // namespace WebCore
#endif // DocPtr_h
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