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/* $Id: avl_Enum.cpp.h $ */
/** @file
* Enumeration routines for AVL trees.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.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, in version 3 of the
* License.
*
* 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, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
#ifndef _kAVLEnum_h_
#define _kAVLEnum_h_
/**
* Gets the root node.
*
* @returns Pointer to the root node.
* @returns NULL if the tree is empty.
*
* @param ppTree Pointer to pointer to the tree root node.
*/
KAVL_DECL(PKAVLNODECORE) KAVL_FN(GetRoot)(PPKAVLNODECORE ppTree)
{
return KAVL_GET_POINTER_NULL(ppTree);
}
/**
* Gets the right node.
*
* @returns Pointer to the right node.
* @returns NULL if no right node.
*
* @param pNode The current node.
*/
KAVL_DECL(PKAVLNODECORE) KAVL_FN(GetRight)(PKAVLNODECORE pNode)
{
if (pNode)
return KAVL_GET_POINTER_NULL(&pNode->pRight);
return NULL;
}
/**
* Gets the left node.
*
* @returns Pointer to the left node.
* @returns NULL if no left node.
*
* @param pNode The current node.
*/
KAVL_DECL(PKAVLNODECORE) KAVL_FN(GetLeft)(PKAVLNODECORE pNode)
{
if (pNode)
return KAVL_GET_POINTER_NULL(&pNode->pLeft);
return NULL;
}
# ifdef KAVL_EQUAL_ALLOWED
/**
* Gets the next node with an equal (start) key.
*
* @returns Pointer to the next equal node.
* @returns NULL if the current node was the last one with this key.
*
* @param pNode The current node.
*/
KAVL_DECL(PKAVLNODECORE) KAVL_FN(GetNextEqual)(PKAVLNODECORE pNode)
{
if (pNode)
return KAVL_GET_POINTER_NULL(&pNode->pList);
return NULL;
}
# endif /* KAVL_EQUAL_ALLOWED */
#endif
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