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/* This file is part of the FaCT++ DL reasoner
Copyright (C) 2003-2015 Dmitry Tsarkov and The University of Manchester
Copyright (C) 2015-2016 Dmitry Tsarkov
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _TSAVESTACK_H
#define _TSAVESTACK_H
#include "growingArrayP.h"
#include "fpp_assert.h"
/**
* Template stack for Saving/Restoring internal state of template parameter.
* Implemented as a growing array of pointers with more ops
*/
template <class T>
class TSaveStack: public growingArrayP<T>
{
public: // interface
/// c'tor: do nothing
TSaveStack ( void ) {}
/// d'tor: do nothing (all done in ~gaP)
virtual ~TSaveStack ( void ) {}
// stack operations
/// get a new object from the stack;it will be filled by caller
T* push ( void )
{
this->ensureHeapSize();
return this->Base[this->last++];
}
/// get an object from the top of the stack
T* pop ( void ) { return this->Base[--this->last]; }
/// get an object from a fixed depth
T* pop ( unsigned int depth )
{
fpp_assert ( this->last >= depth );
this->last = depth;
return pop();
}
/// get an object from a fixed depth
T* top ( unsigned int depth )
{
fpp_assert ( this->last >= depth );
this->last = depth;
return this->Base[depth-1];
}
}; // TSaveStack
#endif
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