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/*
Copyright (C) 1997,1998,1999,2000,2001 Franz Josef Och (RWTH Aachen - Lehrstuhl fuer Informatik VI)
This file is part of GIZA++ ( extension of GIZA ).
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 2
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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
USA.
*/
#ifndef HEADER_Pointer_DEFINED
#define HEADER_Pointer_DEFINED
#include <assert.h>
#include <iostream>
template<class T>
class SmartPointer
{
protected:
T*p;
public:
SmartPointer(T*_p=0)
: p(_p) {}
inline T&operator*() const
{return *p;}
inline T*operator->() const
{return p;}
inline operator bool() const
{return p!=0;}
inline T*ptr() const
{ return p; }
};
template<class T> inline ostream &operator<<(ostream&out,const SmartPointer<T>&s)
{if( s.ptr() )return out << *s;else return out <<"nullpointer";}
template<class T>
class SmartPointerConst
{
protected:
const T*p;
public:
SmartPointerConst(const T*_p=0)
: p(_p) {}
inline const T&operator*() const
{return *p;}
inline const T*operator->() const
{return p;}
inline operator bool() const
{return p!=0;}
inline const T*ptr() const
{ return p; }
};
template<class T> inline ostream &operator<<(ostream&out,const SmartPointerConst<T>&s)
{if( s.ptr() )return out << *s;else return out <<"nullpointer";}
template <class T>
class UP : public SmartPointer<T>
{
public:
UP(T*_p=0)
: SmartPointer<T>(_p) {}
};
template<class T> inline bool operator==(const UP<T>&s1,const UP<T>&s2)
{return s1.ptr()==s2.ptr();}
template<class T> inline bool operator<(const UP<T>&s1,const UP<T>&s2)
{return s1.ptr() < s2.ptr();}
template<class T> inline int Hash(const UP<T> &wp)
{if(wp.ptr())return Hash(*wp);else return 0;}
template <class T>
class UPConst : public SmartPointerConst<T>
{
public:
UPConst(const T*_p=0)
: SmartPointerConst<T>(_p) {}
};
template<class T> inline bool operator==(const UPConst<T>&s1,const UPConst<T>&s2)
{return s1.ptr()==s2.ptr();}
template<class T> inline bool operator<(const UPConst<T>&s1,const UPConst<T>&s2)
{return s1.ptr()<s2.ptr();}
template<class T> inline int Hash(const UPConst<T> &wp)
{if(wp.ptr())return Hash(*wp);else return 0;}
template <class T>
class MP : public SmartPointer<T>
{
public:
MP(T*_p=0)
: SmartPointer<T>(_p) {}
};
template <class T> inline bool operator==(const MP<T>&s1,const MP<T>&s2)
{assert(s1);assert(s2);return *s1==*s2;}
template <class T> inline bool operator<(const MP<T>&s1,const MP<T>&s2)
{assert(s1);assert(s2);return *s1 < *s2;}
template <class T> inline int Hash(const MP<T> &wp)
{if(wp.ptr())return Hash(*wp);else return 0;}
template <class T>
class MPConst : public SmartPointerConst<T>
{
public:
MPConst(const T*_p=0)
: SmartPointerConst<T>(_p) {}
};
template <class T> inline bool operator==(const MPConst<T>&s1,const MPConst<T>&s2)
{assert(s1);assert(s2);return *s1== *s2;}
template <class T> inline bool operator<(const MPConst<T>&s1,const MPConst<T>&s2)
{assert(s1);assert(s2);return *s1 < *s2;}
template <class T> inline int Hash(const MPConst<T> &wp)
{if(wp.ptr())return Hash(*wp);else return 0;}
template <class T>
class DELP : public SmartPointer<T>
{
private:
DELP(const DELP<T>&x);
public:
const DELP<T>&operator=(DELP<T>&x)
{
delete this->p;
this->p=x.p;x.p=0;
return *this;
}
~DELP()
{ delete this->p;this->p=0;}
DELP(T*_p=0)
: SmartPointer<T>(_p) {}
void set(T*_p)
{
delete this->p;
this->p=_p;
}
friend bool operator==(const DELP<T>&s1,const DELP<T>&s2)
{
return *(s1.p)== *(s2.p);
}
friend bool operator<(const DELP<T>&s1,const DELP<T>&s2)
{
return *(s1.p) < *(s2.p);
}
friend inline int Hash(const DELP<T> &wp)
{
if(wp.p)
return Hash(*wp.p);
else
return 0;
}
};
#endif
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