1 files changed, 89 insertions, 0 deletions
diff --git a/src/lib/kStuff/include/k/kRbTmpl/kRbGet.h b/src/lib/kStuff/include/k/kRbTmpl/kRbGet.h
new file mode 100644
index 0000000..b03d4e1
--- /dev/null
+++ b/src/lib/kStuff/include/k/kRbTmpl/kRbGet.h
@@ -0,0 +1,89 @@
+/* $Id: kRbGet.h 35 2009-11-08 19:39:03Z bird $ */
+/** @file
+ * kRbTmpl - Templated Red-Black 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 Red-Back tree's root structure.
+ * @param   Key         Key value of the node which is to be found.
+ */
+KRB_DECL(KRBNODE *) KRB_FN(Get)(KRBROOT *pRoot, KRBKEY Key)
+{
+    KRBNODE *pNode;
+#ifdef KRB_CACHE_SIZE
+    KRBTREEPTR *ppEntry;
+#endif
+
+    KRB_READ_LOCK(pRoot);
+    if (pRoot->mpRoot == KRB_NULL)
+    {
+        KRB_READ_UNLOCK(pRoot);
+        return NULL;
+    }
+
+#ifdef KRB_CACHE_SIZE
+    ppEntry = &pRoot->maLookthru[KRB_CACHE_HASH(Key)];
+    pNode = KRB_GET_POINTER_NULL(ppEntry);
+    if (!pNode || KRB_CMP_NE(pNode->mKey, Key))
+#endif
+    {
+        pNode = KRB_GET_POINTER(&pRoot->mpRoot);
+        while (KRB_CMP_NE(pNode->mKey, Key))
+        {
+            if (KRB_CMP_G(pNode->mKey, Key))
+            {
+                if (pNode->mpLeft == KRB_NULL)
+                {
+                    KRB_READ_UNLOCK(pRoot);
+                    return NULL;
+                }
+                pNode = KRB_GET_POINTER(&pNode->mpLeft);
+            }
+            else
+            {
+                if (pNode->mpRight == KRB_NULL)
+                {
+                    KRB_READ_UNLOCK(pRoot);
+                    return NULL;
+                }
+                pNode = KRB_GET_POINTER(&pNode->mpRight);
+            }
+        }
+
+#ifdef KRB_CACHE_SIZE
+        KRB_SET_POINTER(ppEntry, pNode);
+#endif
+    }
+
+    KRB_READ_UNLOCK(pRoot);
+    return pNode;
+}
+