1 files changed, 26 insertions, 0 deletions
diff --git a/src/ring.c b/src/ring.c
new file mode 100644
index 0000000..633648b
--- /dev/null
+++ b/src/ring.c
@@ -0,0 +1,26 @@
+#include <assert.h>
+#include <stdlib.h>
+
+#include "ring.h"
+#include "tower.h"
+
+void pickup_ring() {
+	int i;
+	int pickup = -1;
+
+	// should not be called if we are already holding a ring
+	assert(held == NULL);
+
+	// find the smallest ring on the currently hovered tower (if there is one)
+	for(i = 2; i >= 0; --i) {
+		if(rings[i].location == hover) {
+			pickup = i;
+			break;
+		}
+	}
+
+	if(pickup > 0) {
+		held = &rings[pickup];
+		held->held = true;
+	}
+}