avl_Enum.cpp.h revision 677833bc953b6cb418c701facbdcf4aa18d6c44e
/* $Id$ */
/** @file
* Enumeration routines for AVL trees.
*/
/*
* Copyright (C) 2006 InnoTek Systemberatung GmbH
*
* 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 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.
*
* If you received this file as part of a commercial VirtualBox
* distribution, then only the terms of your commercial VirtualBox
* license agreement apply instead of the previous paragraph.
*/
#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.
*/
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.
*/
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.
*/
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.
*/
PKAVLNODECORE KAVL_FN(GetNextEqual)(PKAVLNODECORE pNode)
{
if (pNode)
return KAVL_GET_POINTER_NULL(&pNode->pList);
return NULL;
}
#endif /* KAVL_EQUAL_ALLOWED */
#endif