Category : OS/2 Files
Archive   : GPPDEV8F.ZIP
Filename : SPLAYBAG.HP

 
Output of file : SPLAYBAG.HP contained in archive : GPPDEV8F.ZIP

// This may look like C code, but it is really -*- C++ -*-
/*
Copyright (C) 1988 Free Software Foundation
written by Doug Lea ([email protected])

This file is part of the GNU C++ Library. 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; if not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*/
// This may look like C code, but it is really -*- C++ -*-
/*
Copyright (C) 1988, 1982 Free Software Foundation
written by Doug Lea ([email protected])

This file is part of the GNU C++ Library. 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; if not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*/


#ifndef _SplayBag_h
#ifdef __GNUG__
#pragma interface
#endif
#define _SplayBag_h 1

#include ".Bag.h"
#include ".SplayNode.h"

class SplayBag : public Bag
{
protected:
SplayNode* root;

SplayNode* leftmost();
SplayNode* rightmost();
SplayNode* pred(SplayNode* t);
SplayNode* succ(SplayNode* t);
void _kill(SplayNode* t);
SplayNode* _copy(SplayNode* t);
void _del(SplayNode* t);

public:
SplayBag();
SplayBag(SplayBag& a);
~SplayBag();

Pix add( item);
void del( item);
void remove(item);
int nof( item);
int contains( item);

void clear();

Pix first();
void next(Pix& i);
& operator () (Pix i);
Pix seek( item, Pix from = 0);

Pix last();
void prev(Pix& i);

int OK();
};


inline SplayBag::~SplayBag()
{
_kill(root);
}

inline SplayBag::SplayBag()
{
root = 0;
count = 0;
}

inline SplayBag::SplayBag(SplayBag& b)
{
count = b.count;
root = _copy(b.root);
}

inline Pix SplayBag::first()
{
return Pix(leftmost());
}

inline Pix SplayBag::last()
{
return Pix(rightmost());
}

inline void SplayBag::next(Pix& i)
{
if (i != 0) i = Pix(succ((SplayNode*)i));
}

inline void SplayBag::prev(Pix& i)
{
if (i != 0) i = Pix(pred((SplayNode*)i));
}

inline & SplayBag::operator () (Pix i)
{
if (i == 0) error("null Pix");
return ((SplayNode*)i)->item;
}

inline void SplayBag::clear()
{
_kill(root);
count = 0;
root = 0;
}

inline int SplayBag::contains( key)
{
return seek(key) != 0;
}

inline void SplayBag::del( key)
{
_del((SplayNode*)(seek(key)));
}

#endif