2 files changed, 53 insertions, 0 deletions

diff --git a/engines/titanic/true_talk/tt_string_node.cpp b/engines/titanic/true_talk/tt_string_node.cpp
index b1e2a642e4..da805fa9f1 100644
--- a/engines/titanic/true_talk/tt_string_node.cpp
+++ b/engines/titanic/true_talk/tt_string_node.cpp
@@ -29,6 +29,10 @@ TTstringNode::TTstringNode() : _pPrior(nullptr), _pNext(nullptr),
 		_field14(0), _mode(0), _field1C(0) {
 }
 
+TTstringNode::~TTstringNode() {
+	detach();
+}
+
 void TTstringNode::initialize(int mode) {
 	_mode = mode;
 	_field14 = 0;
@@ -41,12 +45,34 @@ void TTstringNode::initialize(int mode) {
 	}
 }
 
+void TTstringNode::initialize(TTstringNode *oldNode) {
+	_mode = oldNode->_mode;
+	_field14 = oldNode->_field14;
+
+	if (_string.isValid()) {
+		_field1C = 0;
+	} else {
+		_field1C = 11;
+		warning("TTstringNode::initialize has bad subobj");
+	}
+
+	delete oldNode;
+}
+
 void TTstringNode::addNode(TTstringNode *newNode) {
 	TTstringNode *tail = getTail();
 	tail->_pNext = newNode;
 	newNode->_pPrior = this;
 }
 
+void TTstringNode::detach() {
+	if (_pPrior)
+		_pPrior->_pNext = _pNext;
+
+	if (_pNext)
+		_pNext->_pPrior = _pPrior;
+}
+
 TTstringNode *TTstringNode::getTail() const {
 	if (_pNext == nullptr)
 		return nullptr;
@@ -58,6 +84,17 @@ TTstringNode *TTstringNode::getTail() const {
 	return node;
 }
 
+TTstringNode *TTstringNode::scan(TTstringNode *start, const TTString &str, int mode) {
+	for (; start; start = start->_pNext) {
+		if (start->_mode == mode || (mode == 3 && start->_mode < 3)) {
+			if (!strcmp(start->_string.c_str(), str.c_str()))
+				start;
+		}
+	}
+
+	return nullptr;
+}
+
 /*------------------------------------------------------------------------*/
 
 TTsynonymNode::TTsynonymNode() : TTstringNode() {
diff --git a/engines/titanic/true_talk/tt_string_node.h b/engines/titanic/true_talk/tt_string_node.h
index e588ea4883..41ce6c5aad 100644
--- a/engines/titanic/true_talk/tt_string_node.h
+++ b/engines/titanic/true_talk/tt_string_node.h
@@ -38,6 +38,11 @@ protected:
 	 * Initializes state for the node
 	 */
 	void initialize(int mode);
+
+	/**
+	 * Initializes state for the node
+	 */
+	void initialize(TTstringNode *oldNode);
 public:
 	TTstringNode *_pPrior;
 	TTstringNode *_pNext;
@@ -47,11 +52,22 @@ public:
 	int _field1C;
 public:
 	TTstringNode();
+	virtual ~TTstringNode();
 
 	/**
 	 * Links the passed node to this node as a linked list
 	 */
 	void addNode(TTstringNode *newNode);
+
+	/**
+	 * Detaches a node from any predecessor and/or successor
+	 */
+	void detach();
+
+	/**
+	 * Scan for a node with a given string
+	 */
+	static TTstringNode *scan(TTstringNode *start, const TTString &str, int mode);
 };
 
 class TTsynonymNode : public TTstringNode {