123 lines
3.3 KiB
C++
123 lines
3.3 KiB
C++
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/* $XConsortium: Ptr.h /main/2 1996/08/12 16:00:24 mgreess $ */
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// Copyright (c) 1994 James Clark
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// See the file COPYING for copying permission.
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#ifndef Ptr_INCLUDED
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#define Ptr_INCLUDED 1
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#include "Boolean.h"
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// T must have Resource as a public base class
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// T may be an incomplete type
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#ifdef SP_NAMESPACE
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namespace SP_NAMESPACE {
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#endif
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template<class T>
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class Ptr {
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public:
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Ptr() : ptr_(0) { }
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Ptr(T *ptr);
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~Ptr();
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Ptr(const Ptr<T> &);
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Ptr<T> &operator=(const Ptr<T> &);
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Ptr<T> &operator=(T *);
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T *pointer() const { return ptr_; }
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T *operator->() const { return ptr_; }
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T &operator*() const { return *ptr_; }
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void swap(Ptr<T> &p) {
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T *tem = p.ptr_;
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p.ptr_ = ptr_;
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ptr_ = tem;
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}
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Boolean isNull() const { return ptr_ == 0; }
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// operator const void *() const { return ptr_; }
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void clear();
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Boolean operator==(const Ptr<T> &p) const {
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return ptr_ == p.ptr_;
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}
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Boolean operator!=(const Ptr<T> &p) const {
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return ptr_ != p.ptr_;
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}
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Boolean operator==(const T *p) const {
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return ptr_ == p;
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}
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Boolean operator!=(const T *p) const {
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return ptr_ != p;
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}
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private:
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T *ptr_;
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};
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template<class T>
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class ConstPtr : private Ptr<T> {
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public:
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ConstPtr() { }
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ConstPtr(T *ptr) : Ptr<T>(ptr) { }
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ConstPtr(const Ptr<T> &p) : Ptr<T>(p) { }
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ConstPtr(const ConstPtr<T> &p) : Ptr<T>(p) { }
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ConstPtr<T> &operator=(const Ptr<T> &p) {
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Ptr<T>::operator=(p); return *this;
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}
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ConstPtr<T> &operator=(const ConstPtr<T> &p) {
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Ptr<T>::operator=(p); return *this;
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}
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ConstPtr<T> &operator=(T *p) {
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Ptr<T>::operator=(p); return *this;
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}
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const T *pointer() const { return Ptr<T>::pointer(); }
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const T *operator->() const { return Ptr<T>::pointer(); }
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const T &operator*() const { return *Ptr<T>::pointer(); }
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void swap(ConstPtr<T> &p) { Ptr<T>::swap(p); }
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using Ptr<T>::isNull;
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#if defined(__SUNPRO_CC) && __SUNPRO_CC == 0x5100
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/* Needed to avoid symbol export collision */
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void clear() { Ptr<T>::clear(); }
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#else
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using Ptr<T>::clear;
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#endif
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Boolean operator==(const Ptr<T> &p) const { return Ptr<T>::operator==(p); }
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Boolean operator!=(const Ptr<T> &p) const { return Ptr<T>::operator!=(p); }
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Boolean operator==(const ConstPtr<T> &p) const {
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return Ptr<T>::operator==(p);
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}
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Boolean operator!=(const ConstPtr<T> &p) const {
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return Ptr<T>::operator!=(p);
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}
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};
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#ifdef SP_NAMESPACE
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}
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#endif
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#endif /* not Ptr_INCLUDED */
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#ifdef SP_DEFINE_TEMPLATES
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#include "Ptr.C"
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#endif
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