/*
 *  ReactOS kernel
 *  Copyright (C) 2003 ReactOS Team
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
/* $Id$
 *
 * COPYRIGHT:         See COPYING in the top level directory
 * PROJECT:           ReactOS system libraries
 * PURPOSE:           Splay-Tree implementation
 * FILE:              lib/ntdll/rtl/splaytree.c
 */

#include <ddk/ntddk.h>

/* FUNCTIONS *****************************************************************/

PRTL_SPLAY_LINKS STDCALL
RtlSubtreePredecessor (IN PRTL_SPLAY_LINKS Links)
{
  PRTL_SPLAY_LINKS Child;

  Child = Links->RightChild;
  if (Child == NULL)
    return NULL;

  if (Child->LeftChild == NULL)
    return Child;

  /* Get left-most child */
  while (Child->LeftChild != NULL)
    Child = Child->LeftChild;

  return Child;
}


PRTL_SPLAY_LINKS STDCALL
RtlSubtreeSuccessor (IN PRTL_SPLAY_LINKS Links)
{
  PRTL_SPLAY_LINKS Child;

  Child = Links->LeftChild;
  if (Child == NULL)
    return NULL;

  if (Child->RightChild == NULL)
    return Child;

  /* Get right-most child */
  while (Child->RightChild != NULL)
    Child = Child->RightChild;

  return Child;
}

/* EOF */