From 6d73a796cac1c90e3c401c432f11c940e92b467c Mon Sep 17 00:00:00 2001
From: Walter Julius Hennecke <walter.julius@hennecke-online.net>
Date: Fri, 12 Apr 2013 23:52:21 +0200
Subject: [PATCH] Added list_at function

---
 code/game/list.c | 19 +++++++++++++++++++
 code/game/list.h |  9 +++++++++
 2 files changed, 28 insertions(+)

diff --git a/code/game/list.c b/code/game/list.c
index db4d1ad..77dfffc 100644
--- a/code/game/list.c
+++ b/code/game/list.c
@@ -337,3 +337,22 @@ void list_init(struct list * l, void (*destructor)(void*)) {
 	l->destructor = destructor;
 }
 
+container_p list_at(list_p list, int idx) {
+	list_iter_p iter;
+	container_p c = NULL;
+	int i;
+
+	if(idx < 0 || idx >= list->length || list == NULL) {
+		return NULL;
+	}
+
+	iter = list_iterator(list, LIST_FRONT);
+	for(c = list_next(iter), i  = 0; c != NULL; c = list_next(iter), i++) {
+		if(i == idx) {
+			break;
+		}
+	}
+
+	return c;
+}
+
diff --git a/code/game/list.h b/code/game/list.h
index 0085b77..062764a 100644
--- a/code/game/list.h
+++ b/code/game/list.h
@@ -324,4 +324,13 @@ void list_clear(list_p list);
  */
 void list_init(struct list * l, void (*destructor)(void*));
 
+/**
+ * Get the element at the given index.
+ *
+ * \param list a list
+ * \param idx index
+ * \return element at given index or NULL if index is out of bounds
+ */
+container_p list_at(list_p list, int idx);
+
 #endif
\ No newline at end of file