From cb4ff3097c7ad340e805c07b5ad1a2c1c77330dc Mon Sep 17 00:00:00 2001
From: Henry de Valence <hdevalence@hdevalence.ca>
Date: Wed, 1 Feb 2017 00:29:44 -0500
Subject: [PATCH] Add FieldElement::is_zero()

---
 src/field.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/field.rs b/src/field.rs
index 7d5bc44..f26108d 100644
--- a/src/field.rs
+++ b/src/field.rs
@@ -521,6 +521,15 @@ impl FieldElement {
         (bytes[0] & 1) as i32
     }
 
+    /// Determine if this `FieldElement` is zero.
+    ///
+    /// # Return
+    ///
+    /// If zero, return `1u8`.  Otherwise, return `0u8`.
+    pub fn is_zero(&self) -> u8 {
+        return 1u8 & (!self.is_nonzero());
+    }
+
     /// Determine if this `FieldElement` is non-zero.
     ///
     /// # Return