Today's the day. Renamed platform to framework.

container/BinaryTree.h

@@ -0,0 +1,163 @@
+/*
+ * BinaryTree.h
+ *
+ *  Created on: 09.03.2015
+ *      Author: baetz
+ */
+
+#ifndef FRAMEWORK_CONTAINER_BINARYTREE_H_
+#define FRAMEWORK_CONTAINER_BINARYTREE_H_
+
+#include <stddef.h>
+#include <stdint.h>
+#include <map>
+template<typename Tp>
+class BinaryNode {
+public:
+	BinaryNode(Tp* setValue) :
+			value(setValue), left(NULL), right(NULL), parent(NULL) {
+	}
+	Tp *value;
+	BinaryNode* left;
+	BinaryNode* right;
+	BinaryNode* parent;
+};
+
+template<typename Tp>
+class ExplicitNodeIterator {
+public:
+	typedef ExplicitNodeIterator<Tp> _Self;
+	typedef BinaryNode<Tp> _Node;
+	typedef Tp value_type;
+	typedef Tp* pointer;
+	typedef Tp& reference;
+	ExplicitNodeIterator() :
+			element(NULL) {
+	}
+	ExplicitNodeIterator(_Node* node) :
+			element(node) {
+	}
+	BinaryNode<Tp>* element;
+	_Self up() {
+		return _Self(element->parent);
+	}
+	_Self left() {
+		if (element != NULL) {
+			return _Self(element->left);
+		} else {
+			return _Self(NULL);
+		}
+
+	}
+	_Self right() {
+		if (element != NULL) {
+			return _Self(element->right);
+		} else {
+			return _Self(NULL);
+		}
+
+	}
+	bool operator==(const _Self& __x) const {
+		return element == __x.element;
+	}
+	bool operator!=(const _Self& __x) const {
+		return element != __x.element;
+	}
+    pointer
+    operator->() const {
+    	if (element != NULL) {
+    		return element->value;
+    	} else {
+    		return NULL;
+    	}
+    }
+    pointer operator*() const {
+    	return this->operator->();
+    }
+};
+
+/**
+ * Pretty rudimentary version of a simple binary tree (not a binary search tree!).
+ */
+template<typename Tp>
+class BinaryTree {
+public:
+	typedef ExplicitNodeIterator<Tp> iterator;
+	typedef BinaryNode<Tp> Node;
+	typedef std::pair<iterator, iterator> children;
+	BinaryTree() :
+			rootNode(NULL) {
+	}
+	BinaryTree(Node* rootNode) :
+			rootNode(rootNode) {
+	}
+	iterator begin() const {
+		return iterator(rootNode);
+	}
+	static iterator end() {
+		return iterator(NULL);
+	}
+	iterator insert(bool insertLeft, iterator parentNode, Node* newNode ) {
+		newNode->parent = parentNode.element;
+		//TODO: Why do I delete the child references of the node? This kills reconnection :-p
+//		newNode->left = NULL;
+//		newNode->right = NULL;
+		if (parentNode.element != NULL) {
+			if (insertLeft) {
+				parentNode.element->left = newNode;
+			} else {
+				parentNode.element->right = newNode;
+			}
+		} else {
+			//Insert first element.
+			rootNode = newNode;
+		}
+		return iterator(newNode);
+	}
+	//No recursion to children. Needs to be done externally.
+	children erase(iterator node) {
+		if (node.element == rootNode) {
+			//We're root node
+			rootNode = NULL;
+		} else {
+			//Delete parent's reference
+			if (node.up().left() == node) {
+				node.up().element->left = NULL;
+			} else {
+				node.up().element->right = NULL;
+			}
+		}
+		return children(node.element->left, node.element->right);
+	}
+	static uint32_t countLeft(iterator start) {
+		if (start == end()) {
+			return 0;
+		}
+		//We also count the start node itself.
+		uint32_t count = 1;
+		while (start.left() != end()) {
+			count++;
+			start = start.left();
+		}
+		return count;
+	}
+	static uint32_t countRight(iterator start) {
+		if (start == end()) {
+			return 0;
+		}
+		//We also count the start node itself.
+		uint32_t count = 1;
+		while (start.right() != end()) {
+			count++;
+			start = start.right();
+		}
+		return count;
+	}
+
+protected:
+	Node* rootNode;
+};
+
+
+
+#endif /* FRAMEWORK_CONTAINER_BINARYTREE_H_ */