Add set index function for double ended queue.

2 files changed, 12 insertions, 1 deletions

diff --git a/collections/double_ended_queue.c b/collections/double_ended_queue.c
index e737d28..232fb44 100644
--- a/collections/double_ended_queue.c
+++ b/collections/double_ended_queue.c
@@ -101,6 +101,16 @@ deq *root;
 	root->base = tmp;
 }
 
+void deq_set(root, index, item)
+deq *root;
+int index;
+void *item;
+{
+	if (!root || !DEQ_IN_BOUNDS(root, index))
+		return;
+	root->base[(root->beg + index) % root->limit] = item;
+}
+
 void* deq_index(root, index)
 deq *root;
 int index;
diff --git a/collections/double_ended_queue.h b/collections/double_ended_queue.h
index 877503d..332b16f 100644
--- a/collections/double_ended_queue.h
+++ b/collections/double_ended_queue.h
@@ -22,8 +22,9 @@ void deq_clear();
 /*data*/
 void deq_push_back(deq*, void*);
 void* deq_pop_front(deq*);
-void* deq_index(deq*, int);
 void* deq_pop_back(deq*);
+void deq_set(deq*, int, void*);
+void* deq_index(deq*, int);
 
 void deq_swap(deq*, int, int);