diff --git a/include/Makefile.am b/include/Makefile.am
index 04f2508..e7b410d 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -3,6 +3,7 @@ nobase_include_HEADERS = trbase.h \
 			 tr/commons.h \
 			 tr/interface.h \
 			 tr/memory.h \
+			 tr/tree_macros.h \
 			 tr/interface/class.h \
 			 tr/interface/indexable.h \
 			 tr/interface/observer.h \
diff --git a/include/tr/tree_macros.h b/include/tr/tree_macros.h
new file mode 100644
index 0000000..c114b4f
--- /dev/null
+++ b/include/tr/tree_macros.h
@@ -0,0 +1,130 @@
+/**
+ * \file
+ *
+ * \author	Georg Hopp
+ *
+ * \copyright
+ * Copyright © 2012  Georg Hopp
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __TR_TREE_MACROS_H__
+#define __TR_TREE_MACROS_H__
+
+#include "trbase.h"
+
+#define TR_TREE_RIGHT(node)		(NULL!=(node)?(node)->right:NULL)
+#define TR_TREE_LEFT(node)		(NULL!=(node)?(node)->left:NULL)
+#define TR_TREE_PARENT(node)	(NULL!=(node)?(node)->parent:NULL)
+
+#define TR_TREE_CHILD(node) \
+	(NULL==TR_TREE_RIGHT((node))?TR_TREE_LEFT((node)):TR_TREE_RIGHT((node)))
+
+#define TR_TREE_SIBLING(node)               \
+	(NULL!=TR_TREE_PARENT((node))?          \
+	 ((node)==TR_TREE_PARENT((node))->left? \
+	  TR_TREE_PARENT((node))->right:        \
+	  TR_TREE_PARENT((node))->left):        \
+	 NULL)
+
+#define TR_TREE_GRANDPARENT(node)	(TR_TREE_PARENT((node))->parent)
+
+#define TR_TREE_UNCLE(node)                          \
+	((node)->parent == (node)->parent->parent->left? \
+	 (node)->parent->parent->right:                  \
+	 (node)->parent->parent->left)
+
+#define TR_TREE_REPLACE_NODE(root, node1, node2) \
+	if (NULL != (node1)->parent) {               \
+		if ((node1) == (node1)->parent->left) {  \
+			(node1)->parent->left = (node2);     \
+		} else {                                 \
+			(node1)->parent->right = (node2);    \
+		}                                        \
+	} else {                                     \
+		*(root) = (node2);                       \
+	}                                            \
+	if (NULL != (node2)) {                       \
+		(node2)->parent = (node1)->parent;       \
+	}
+
+#define TR_TREE_ROT_RCLD_right(node)	((node)->left)
+#define TR_TREE_ROT_RCLD_left(node)		((node)->right)
+
+#define TR_TREE_ROTATE(lr, root, node)                      \
+	if (NULL != (node)) {                                   \
+		void * stPar   = node->parent;                      \
+		void * relCld  = TR_TREE_ROT_RCLD_##lr(node);       \
+		void * relCCld = TR_TREE_ROT_RCLD_##lr(node)->lr;   \
+		void * nLeft_p = &TR_TREE_ROT_RCLD_##lr(node);      \
+		if (NULL != relCCld) {                              \
+			TR_TREE_ROT_RCLD_##lr(node)->lr->parent = node; \
+		}                                                   \
+		TR_TREE_ROT_RCLD_##lr(node)->lr = node;             \
+		if (NULL != node->parent) {                         \
+			if (node->parent->left == node) {               \
+				node->parent->left = relCld;                \
+			} else {                                        \
+				node->parent->right = relCld;               \
+			}                                               \
+		} else {                                            \
+			*(root) = relCld;                               \
+		}                                                   \
+		node->parent = relCld;                              \
+		TR_TREE_ROT_RCLD_##lr(node)->parent = stPar;        \
+		*(void**)nLeft_p = relCCld;                         \
+	}
+
+typedef enum {rbBlack=1, rbRed=2} TR_rbColor;
+
+#define TR_TREE_NODE_BLACK(node)		(NULL == (node) || rbBlack == (node)->color)
+#define TR_TREE_NODE_RED(node)			(NULL == (node) || rbRed == (node)->color)
+#define TR_TREE_NODE_STRICT_BLACK(node)	(NULL != (node) && rbBlack == (node)->color)
+#define TR_TREE_NODE_STRICT_RED(node)	(NULL != (node) && rbRed == (node)->color)
+
+#define TR_TREE_INORDER_SUCC(node, succ) \
+	succ = (node)->right;                \
+	while (NULL != succ->left) {         \
+		succ = succ->left;               \
+	}
+/*
+ * Find data in a tree. 
+ * Attention: This will change node, so normally you need to copy
+ * it before using this macro.
+ * Also be aware that found needs to be a valid lvalue and an integer.
+ */
+#define TR_TREE_FIND(node, search, found, comp)          \
+	(found) = -1;                                        \
+	if ((node)) {                                        \
+		while(1) {                                       \
+			(found) = (comp)((node)->data, (search));    \
+			if (0 != (found)) {                          \
+				if (! ((node)->left || (node)->right)) { \
+					break;                               \
+				}                                        \
+				if (0 < (found)) {                       \
+					(node) = (node)->left;               \
+				} else {                                 \
+					(node) = (node)->right;              \
+				}                                        \
+			} else {                                     \
+				break;                                   \
+			}                                            \
+		}                                                \
+	}
+
+#endif // __TR_TREE_MACROS_H__
+
+// vim: set ts=4 sw=4:
diff --git a/src/memory.c b/src/memory.c
index e7257d7..a2fc185 100644
--- a/src/memory.c
+++ b/src/memory.c
@@ -98,6 +98,30 @@ newElement(size_t size)
     return element;
 }
 
+static
+int
+_memSegmentFindCompare(const void * a, const void * b)
+{
+    struct memSegment * _a = (struct memSegment *)a;
+    size_t              _b = *(size_t *)b;
+
+    /*
+     * find the smallest bigger or equal size segment
+     */
+    return _a->size < _b ? -1
+        : _a->size > _b && _a->left && _a->left->size >= _b ? 1 : 0;
+}
+
+static
+int
+_memSegmentCompare(const void * a, const void * b)
+{
+    size_t _a = ((struct memSegment *)a)->size;
+    size_t _b = ((struct memSegment *)b)->size;
+
+    return _a < _b ? -1 : _a > _b ? 1 : 0;
+}
+
 /**
  * find element in tree
  */
@@ -105,23 +129,11 @@ static
 struct memSegment *
 findElement(struct memSegment * tree, size_t size)
 {
-    struct memSegment * fitting = NULL;
-
-    while (NULL != tree) {
-        if (tree->size == size) {
-            fitting = tree;
-            break;
-        }
+	int found;
 
-        if (size > tree->size) {
-            tree = tree->right;
-        } else {
-            fitting = tree;
-            tree    = tree->left;
-        }
-    }
+	TR_TREE_FIND(tree, &size, found, _memSegmentFindCompare);
 
-    return fitting;
+	return found == 0 ? tree : NULL;
 }
 
 /**
@@ -135,6 +147,7 @@ insertElement(struct memSegment ** tree, struct memSegment * element)
     struct memSegment * new_node = NULL;
     struct memSegment * u;
     struct memSegment * g;
+	int                 found;
 
     element->next   = NULL;
     element->last   = NULL;
@@ -144,42 +157,35 @@ insertElement(struct memSegment ** tree, struct memSegment * element)
     element->left   = NULL;
     element->right  = NULL;
 
+	TR_TREE_FIND(node, element, found, _memSegmentCompare);
+
     // if tree is empty it's simple... :)
     if (NULL == node) {
         *tree = node = new_node = element;
-    } else {
-        // normal binary tree add....
-        while (NULL != node) {
-            if (element->size < node->size) {
-                if (NULL == node->left) {
-                    node->left         = element;
-                    node->left->parent = node;
-                    new_node = node = node->left;
-                    break;
-                } else {
-                    node = node->left;
-                }
-            } else if (element->size > node->size) {
-                if (NULL == node->right) {
-                    node->right         = element;
-                    node->right->parent = node;
-                    new_node = node = node->right;
-                    break;
-                } else {
-                    node = node->right;
-                }
-            } else {
-                if (NULL == node->next) {
-                    node->next = element;
-                    node->last = element;
-                } else {
-                    node->last->next = element;
-                    node->last       = element;
-                }
-                return node;
-            }
-        }
-    }
+	} else {
+		// normal binary tree add....
+		if (found == 0) {
+			if (NULL == node->next) {
+				node->next = element;
+				node->last = element;
+			} else {
+                node->last->next = element;
+                node->last       = element;
+			}
+			return node;
+		} else {
+			if (0 < found) {
+				node->left         = element;
+				node->left->parent = node;
+				new_node = node = node->left;
+			} else {
+				node->right         = element;
+				node->right->parent = node;
+				new_node = node = node->right;
+
+			}
+		}
+	}
 
     if (NULL != new_node) {
         /* 
@@ -250,50 +256,43 @@ deleteElement(struct memSegment ** tree, struct memSegment * element)
     struct memSegment * del_node;
     struct memSegment * child;
     struct memSegment * s;
+	int                 found;
 
     // find the relevant node and it's parent
-    while (NULL != node) {
-
-        if (element->size < node->size) {
-            node = node->left;
-        } else if (element->size > node->size) {
-            node = node->right;
-        } else {
-            if (NULL != node->next) {
-                if (NULL != node->parent) {
-                    if (node == node->parent->left) {
-                        node->parent->left = node->next;
-                    } else {
-                        node->parent->right = node->next;
-                    }
-                } else {
-                    *tree = node->next;
-                }
+	TR_TREE_FIND(node, element, found, _memSegmentCompare);
 
-                if (NULL != node->left) {
-                    node->left->parent = node->next;
-                }
+	//while (node) {
+    if (found != 0) {
+		return NULL;
+	} else {
+		if (NULL != node->next) {
+			if (NULL != node->parent) {
+				if (node == node->parent->left) {
+					node->parent->left = node->next;
+				} else {
+					node->parent->right = node->next;
+				}
+			} else {
+				*tree = node->next;
+			}
 
-                if (NULL != node->right) {
-                    node->right->parent = node->next;
-                }
-                
-                node->next->last   = node->last;
-                node->next->color  = node->color;
-                node->next->parent = node->parent;
-                node->next->left   = node->left;
-                node->next->right  = node->right;
-
-                return node;
-            }
-            break;
-        }
-    }
+			if (NULL != node->left) {
+				node->left->parent = node->next;
+			}
 
-    // element not found
-    if (NULL == node) {
-        return node;
-    }
+			if (NULL != node->right) {
+				node->right->parent = node->next;
+			}
+			
+			node->next->last   = node->last;
+			node->next->color  = node->color;
+			node->next->parent = node->parent;
+			node->next->left   = node->left;
+			node->next->right  = node->right;
+
+			return node;
+		}
+	}
 
     del_node = node;