Added some splay-tree functions.

svn path=/trunk/; revision=5959

reactos/lib/ntdll/def/ntdll.def

@@ -1,4 +1,4 @@
-; $Id: ntdll.def,v 1.107 2003/08/22 13:46:55 ea Exp $
+; $Id: ntdll.def,v 1.108 2003/09/02 11:21:59 ekohl Exp $
 ;
 ; ReactOS Operating System
 ;
@@ -556,8 +556,8 @@ RtlSizeHeap@12
 ;RtlStartRXact
 RtlSubAuthorityCountSid@4
 RtlSubAuthoritySid@8
-;RtlSubtreePredecessor
+RtlSubtreePredecessor@4
-;RtlSubtreeSuccessor
+RtlSubtreeSuccessor@4
 RtlSystemTimeToLocalTime@8
 RtlTimeFieldsToTime@8
 RtlTimeToElapsedTimeFields@8

reactos/lib/ntdll/def/ntdll.edf

@@ -1,4 +1,4 @@
-; $Id: ntdll.edf,v 1.96 2003/08/22 13:46:55 ea Exp $
+; $Id: ntdll.edf,v 1.97 2003/09/02 11:21:59 ekohl Exp $
 ;
 ; ReactOS Operating System
 ;
@@ -555,8 +555,8 @@ RtlSizeHeap=RtlSizeHeap@12
 ;RtlStartRXact
 RtlSubAuthorityCountSid=RtlSubAuthorityCountSid@4
 RtlSubAuthoritySid=RtlSubAuthoritySid@8
-;RtlSubtreePredecessor
+RtlSubtreePredecessor=RtlSubtreePredecessor@4
-;RtlSubtreeSuccessor
+RtlSubtreeSuccessor=RtlSubtreeSuccessor@4
 RtlSystemTimeToLocalTime=RtlSystemTimeToLocalTime@8
 RtlTimeFieldsToTime=RtlTimeFieldsToTime@8
 RtlTimeToElapsedTimeFields=RtlTimeToElapsedTimeFields@8

reactos/lib/ntdll/rtl/splaytree.c

@@ -0,0 +1,70 @@
+/*
+ *  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: splaytree.c,v 1.1 2003/09/02 11:19:29 ekohl Exp $
+ *
+ * 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 */