1 files changed, 89 insertions, 0 deletions
diff --git a/src/lib/kStuff/include/k/kAvlTmpl/kAvlGet.h b/src/lib/kStuff/include/k/kAvlTmpl/kAvlGet.h
new file mode 100644
index 0000000..a80eb49
--- /dev/null
+++ b/src/lib/kStuff/include/k/kAvlTmpl/kAvlGet.h
@@ -0,0 +1,89 @@
+/* $Id: kAvlGet.h 29 2009-07-01 20:30:29Z bird $ */
+/** @file
+ * kAvlTmpl - Templated AVL Trees, Get a Node.
+ */
+
+/*
+ * 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 (does not remove it!)
+ *
+ * @returns Pointer to the node holding the given key.
+ * @param   pRoot       Pointer to the AVL-tree root structure.
+ * @param   Key         Key value of the node which is to be found.
+ */
+KAVL_DECL(KAVLNODE *) KAVL_FN(Get)(KAVLROOT *pRoot, KAVLKEY Key)
+{
+    KAVLNODE *pNode;
+#ifdef KAVL_LOOKTHRU_CACHE
+    KAVLTREEPTR *ppEntry;
+#endif
+
+    KAVL_READ_LOCK(pRoot);
+    if (pRoot->mpRoot == KAVL_NULL)
+    {
+        KAVL_READ_UNLOCK(pRoot);
+        return NULL;
+    }
+
+#ifdef KAVL_LOOKTHRU_CACHE
+    ppEntry = &pRoot->maLookthru[KAVL_LOOKTHRU_HASH(Key)];
+    pNode = KAVL_GET_POINTER_NULL(ppEntry);
+    if (!pNode || KAVL_NE(pNode->mKey, Key))
+#endif
+    {
+        pNode = KAVL_GET_POINTER(&pRoot->mpRoot);
+        while (KAVL_NE(pNode->mKey, Key))
+        {
+            if (KAVL_G(pNode->mKey, Key))
+            {
+                if (pNode->mpLeft == KAVL_NULL)
+                {
+                    KAVL_READ_UNLOCK(pRoot);
+                    return NULL;
+                }
+                pNode = KAVL_GET_POINTER(&pNode->mpLeft);
+            }
+            else
+            {
+                if (pNode->mpRight == KAVL_NULL)
+                {
+                    KAVL_READ_UNLOCK(pRoot);
+                    return NULL;
+                }
+                pNode = KAVL_GET_POINTER(&pNode->mpRight);
+            }
+        }
+
+#ifdef KAVL_LOOKTHRU_CACHE
+        KAVL_SET_POINTER(ppEntry, pNode);
+#endif
+    }
+
+    KAVL_READ_UNLOCK(pRoot);
+    return pNode;
+}
+