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/* $Id: avl_Enum.cpp.h $ */
/** @file
* Enumeration routines for AVL trees.
*/
/*
* Copyright (C) 2006-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE 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.
*/
#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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