1 files changed, 72 insertions, 0 deletions
diff --git a/plugins/Updater/common.cpp b/plugins/Updater/common.cpp
new file mode 100644
index 0000000000..f7b240bbf6
--- /dev/null
+++ b/plugins/Updater/common.cpp
@@ -0,0 +1,72 @@
+#include "common.h"
+
+UpdateList::UpdateList(): count(0), head(0), tail(0) {
+}
+
+UpdateList::~UpdateList() {
+	clear();
+}
+
+UpdateList::UpdateList(UpdateList &source): count(0), head(0), tail(0) {
+	for(source.reset(); source.current(); source.next()) 
+		push_back(*source.current());
+}
+
+void UpdateList::clear() {
+	Node *current;
+	while(head) {
+		current = head;
+		head = head->next;
+		delete current;
+	}
+
+	count = 0;
+	head = tail = 0;
+	reset();
+}
+
+int UpdateList::size() {
+	return count;
+}
+
+void UpdateList::reset() {
+	it_current = head;
+}
+
+void UpdateList::erase() {
+	if(it_current) {
+		if(head == it_current) head = head->next;
+		if(tail == it_current) tail = tail->prev;
+
+		if(it_current->next) it_current->next->prev = it_current->prev;
+		if(it_current->prev) it_current->prev->next = it_current->next;
+
+		delete it_current;
+		count--;
+		reset();
+	}
+}
+
+void UpdateList::next() {
+	if(it_current) it_current = (Node *)it_current->next;
+}
+
+UpdateInternal *UpdateList::current() {
+	return (it_current ? &it_current->ui : 0);
+}
+
+void UpdateList::push_back(UpdateInternal &update) {
+	if(tail) {
+		tail->next = new Node;
+		tail->next->prev = tail;
+		tail = tail->next;
+	} else {
+		head = tail = new Node;
+	}
+	tail->ui = update;
+	count++;
+}
+
+UpdateInternal &UpdateList::back() {
+	return tail->ui;
+}