NetBSD/gnu/lib/libg++/include/gen/BSTSet.hP

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1996-03-09 03:00:51 +03:00
// This may look like C code, but it is really -*- C++ -*-
/*
Copyright (C) 1988 Free Software Foundation
written by Doug Lea (dl@rocky.oswego.edu)
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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _<T>BSTSet_h
#ifdef __GNUG__
#pragma interface
#endif
#define _<T>BSTSet_h 1
#include "<T>.Set.h"
#ifndef _<T>BSTNode
#define _<T>BSTNode 1
struct <T>BSTNode
{
<T>BSTNode* lt;
<T>BSTNode* rt;
<T>BSTNode* par;
<T> item;
<T>BSTNode(<T&> h, <T>BSTNode* l=0, <T>BSTNode* r=0,
<T>BSTNode* p = 0);
~<T>BSTNode();
};
inline <T>BSTNode::<T>BSTNode(<T&> h, <T>BSTNode* l, <T>BSTNode* r,
<T>BSTNode* p)
:lt(l), rt(r), par(p), item(h) {}
inline <T>BSTNode::~<T>BSTNode() {}
typedef <T>BSTNode* <T>BSTNodePtr;
#endif
class <T>BSTSet : public <T>Set
{
protected:
<T>BSTNode* root;
<T>BSTNode* leftmost();
<T>BSTNode* rightmost();
<T>BSTNode* pred(<T>BSTNode* t);
<T>BSTNode* succ(<T>BSTNode* t);
void _kill(<T>BSTNode* t);
<T>BSTNode* _copy(<T>BSTNode* t);
public:
<T>BSTSet();
<T>BSTSet(<T>BSTSet& a);
inline ~<T>BSTSet();
Pix add(<T&> item);
void del(<T&> item);
inline int contains(<T&> item);
inline void clear();
inline Pix first();
inline void next(Pix& i);
inline <T>& operator () (Pix i);
Pix seek(<T&> item);
Pix last();
void prev(Pix& i);
int operator == (<T>BSTSet& b);
int operator != (<T>BSTSet& b);
int operator <= (<T>BSTSet& b);
void balance();
int OK();
};
inline <T>BSTSet::~<T>BSTSet()
{
_kill(root);
}
inline <T>BSTSet::<T>BSTSet()
{
root = 0;
count = 0;
}
inline <T>BSTSet::<T>BSTSet(<T>BSTSet& a)
{
count = a.count;
root = _copy(a.root);
}
inline int <T>BSTSet::operator != (<T>BSTSet& b)
{
return ! (*this == b);
}
inline Pix <T>BSTSet::first()
{
return Pix(leftmost());
}
inline Pix <T>BSTSet::last()
{
return Pix(rightmost());
}
inline void <T>BSTSet::next(Pix& i)
{
if (i != 0) i = Pix(succ((<T>BSTNode*)i));
}
inline void <T>BSTSet::prev(Pix& i)
{
if (i != 0) i = Pix(pred((<T>BSTNode*)i));
}
inline <T>& <T>BSTSet::operator () (Pix i)
{
if (i == 0) error("null Pix");
return ((<T>BSTNode*)i)->item;
}
inline void <T>BSTSet::clear()
{
_kill(root);
count = 0;
root = 0;
}
inline int <T>BSTSet::contains(<T&> key)
{
return seek(key) != 0;
}
#endif