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-rw-r--r--src/lib/intmath/bits.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/lib/intmath/bits.c b/src/lib/intmath/bits.c
index 85d901f71b..4b5729e99a 100644
--- a/src/lib/intmath/bits.c
+++ b/src/lib/intmath/bits.c
@@ -3,6 +3,12 @@
* Copyright (c) 2007-2018, The Tor Project, Inc. */
/* See LICENSE for licensing information */
+/**
+ * \file bits.c
+ *
+ * \brief Count the bits in an integer, manipulate powers of 2, etc.
+ **/
+
#include "lib/intmath/bits.h"
/** Returns floor(log2(u64)). If u64 is 0, (incorrectly) returns 0. */