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/* $Id: tree.hpp 2394 2008-12-23 17:27:53Z bennylp $ */
/*
* Copyright (C) 2008-2009 Teluu Inc. (http://www.teluu.com)
* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
*
* 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 __PJPP_TREE_HPP__
#define __PJPP_TREE_HPP__
#include <pj/rbtree.h>
//
// Tree.
//
class PJ_Tree
{
public:
typedef pj_rbtree_comp Comp;
class iterator;
class reverse_iterator;
class Node : private pj_rbtree_node
{
friend class PJ_Tree;
friend class iterator;
friend class reverse_iterator;
public:
Node() {}
explicit Node(void *data) { user_data = data; }
void set_user_data(void *data) { user_data = data; }
void *get_user_data() const { return user_data; }
};
class iterator
{
public:
iterator() {}
iterator(const iterator &rhs) : tr_(rhs.tr_), nd_(rhs.nd_) {}
iterator(pj_rbtree *tr, pj_rbtree_node *nd) : tr_(tr), nd_(nd) {}
Node *operator*() { return (Node*)nd_; }
bool operator==(const iterator &rhs) const { return tr_==rhs.tr_ && nd_==rhs.nd_; }
iterator &operator=(const iterator &rhs) { tr_=rhs.tr_; nd_=rhs.nd_; return *this; }
void operator++() { nd_=pj_rbtree_next(tr_, nd_); }
void operator--() { nd_=pj_rbtree_prev(tr_, nd_); }
protected:
pj_rbtree *tr_;
pj_rbtree_node *nd_;
};
class reverse_iterator : public iterator
{
public:
reverse_iterator() {}
reverse_iterator(const reverse_iterator &it) : iterator(it) {}
reverse_iterator(pj_rbtree *t, pj_rbtree_node *n) : iterator(t, n) {}
reverse_iterator &operator=(const reverse_iterator &rhs) { iterator::operator=(rhs); return *this; }
Node *operator*() { return (Node*)nd_; }
bool operator==(const reverse_iterator &rhs) const { return iterator::operator==(rhs); }
void operator++() { nd_=pj_rbtree_prev(tr_, nd_); }
void operator--() { nd_=pj_rbtree_next(tr_, nd_); }
};
explicit PJ_Tree(Comp *comp) { pj_rbtree_init(&t_, comp); }
iterator begin()
{
return iterator(&t_, pj_rbtree_first(&t_));
}
iterator end()
{
return iterator(&t_, NULL);
}
reverse_iterator rbegin()
{
return reverse_iterator(&t_, pj_rbtree_last(&t_));
}
reverse_iterator rend()
{
return reverse_iterator(&t_, NULL);
}
bool insert(Node *node)
{
return pj_rbtree_insert(&t_, node)==0 ? true : false;
}
Node *find(const void *key)
{
return (Node*)pj_rbtree_find(&t_, key);
}
Node *erase(Node *node)
{
return (Node*)pj_rbtree_erase(&t_, node);
}
unsigned max_height(Node *node=NULL)
{
return pj_rbtree_max_height(&t_, node);
}
unsigned min_height(Node *node=NULL)
{
return pj_rbtree_min_height(&t_, node);
}
private:
pj_rbtree t_;
};
#endif /* __PJPP_TREE_HPP__ */
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