1 files changed, 65 insertions, 0 deletions
diff --git a/src/lib/kStuff/include/k/kAvlTmpl/kAvlGetWithParent.h b/src/lib/kStuff/include/k/kAvlTmpl/kAvlGetWithParent.h
new file mode 100644
index 0000000..997c394
--- /dev/null
+++ b/src/lib/kStuff/include/k/kAvlTmpl/kAvlGetWithParent.h
@@ -0,0 +1,65 @@
+/* $Id: kAvlGetWithParent.h 34 2009-11-08 19:38:40Z bird $ */
+/** @file
+ * kAvlTmpl - Templated AVL Trees, Get Node With Parent.
+ */
+
+/*
+ * Copyright (c) 1999-2009 Knut St. Osmundsen <bird-kStuff-spamix@anduin.net>
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * Gets a node from the tree and its parent node (if any).
+ * The tree remains unchanged.
+ *
+ * @returns Pointer to the node holding the given key.
+ * @param   pRoot       Pointer to the AVL-tree root structure.
+ * @param   ppParent    Pointer to a variable which will hold the pointer to the partent node on
+ *                      return. When no node is found, this will hold the last searched node.
+ * @param   Key         Key value of the node which is to be found.
+ */
+KAVL_DECL(KAVLNODE *) KAVL_FN(GetWithParent)(KAVLROOT *pRoot, KAVLNODE **ppParent, KAVLKEY Key)
+{
+    register KAVLNODE *pNode;
+    register KAVLNODE *pParent;
+
+    KAVL_READ_LOCK(pRoot);
+
+    pParent = NULL;
+    pNode = KAVL_GET_POINTER_NULL(&pRoot->mpRoot);
+    while (     pNode != NULL
+           &&   KAVL_NE(pNode->mKey, Key))
+    {
+        pParent = pNode;
+        if (KAVL_G(pNode->mKey, Key))
+            pNode = KAVL_GET_POINTER_NULL(&pNode->mpLeft);
+        else
+            pNode = KAVL_GET_POINTER_NULL(&pNode->mpRight);
+    }
+
+    KAVL_READ_UNLOCK(pRoot);
+
+    *ppParent = pParent;
+    return pNode;
+}
+