1 files changed, 10 insertions, 0 deletions

diff --git a/src/gnunet/util/array.go b/src/gnunet/util/array.go
index 9076516..f6213bf 100644
--- a/src/gnunet/util/array.go
+++ b/src/gnunet/util/array.go
@@ -30,6 +30,16 @@ func Reverse(b []byte) []byte {
         return r
 }
 
+// IsNull returns true if all bytes in an array are set to 0.
+func IsNull(b []byte) bool {
+        for _, v := range b {
+                if v != 0 {
+                        return false
+                }
+        }
+        return true
+}
+
 // CopyBlock copies 'in' to 'out' so that 'out' is filled completely.
 // - If 'in' is larger than 'out', it is left-truncated before copy
 // - If 'in' is smaller than 'out', it is left-padded with 0 before copy