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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__ */
+