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/****************************************************************************
* pointer.h
*
* This module contains to Pointer class which is a limited version of std::auto_ptr.
*
* from Persistence of Vision(tm) Ray Tracer version 3.6.
* Copyright 1991-2003 Persistence of Vision Team
* Copyright 2003-2004 Persistence of Vision Raytracer Pty. Ltd.
*---------------------------------------------------------------------------
* NOTICE: This source code file is provided so that users may experiment
* with enhancements to POV-Ray and to port the software to platforms other
* than those supported by the POV-Ray developers. There are strict rules
* regarding how you are permitted to use this file. These rules are contained
* in the distribution and derivative versions licenses which should have been
* provided with this file.
*
* These licences may be found online, linked from the end-user license
* agreement that is located at http://www.povray.org/povlegal.html
*---------------------------------------------------------------------------
* This program is based on the popular DKB raytracer version 2.12.
* DKBTrace was originally written by David K. Buck.
* DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
*---------------------------------------------------------------------------
* $File: //depot/povray/3.6-release/source/base/pointer.h $
* $Revision: #2 $
* $Change: 2939 $
* $DateTime: 2004/07/04 13:43:26 $
* $Author: root $
* $Log$
*****************************************************************************/
#ifndef POINTER_H
#define POINTER_H
#include "configbase.h"
BEGIN_POV_BASE_NAMESPACE
template<class X> class Pointer
{
public:
explicit Pointer(X *p = NULL)
{
ptr = p;
}
Pointer(X& a)
{
ptr = a.release();
}
template<class Y> Pointer(Pointer<Y>& a)
{
ptr = a.release();
}
~Pointer()
{
if(ptr != NULL)
delete ptr;
ptr = NULL;
}
Pointer& operator=(Pointer& a)
{
reset(a.release());
return *this;
}
template<class Y> Pointer& operator=(Pointer<Y>& a)
{
reset(a.release());
return *this;
}
X& operator*() const
{
return *ptr;
}
X *operator->() const
{
return ptr;
}
X *get() const
{
return ptr;
}
X *release()
{
X *t = ptr;
ptr = NULL;
return t;
}
void reset(X *p = NULL)
{
if(ptr != NULL)
delete ptr;
ptr = p;
}
bool operator==(void *p)
{
return (ptr == p);
}
bool operator!=(void *p)
{
return (ptr != p);
}
private:
X *ptr;
};
END_POV_BASE_NAMESPACE
#endif
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