From 3e7cce7ccffc8184fbcc71e0682b28200257b692 Mon Sep 17 00:00:00 2001
From: MITSUNARI Shigeo <herumi@nifty.com>
Date: Sat, 11 Jun 2016 19:24:47 +0900
Subject: [PATCH] add operator< for Ec

---
 include/mcl/ec.hpp | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/include/mcl/ec.hpp b/include/mcl/ec.hpp
index 5bb0b00..ad1c749 100644
--- a/include/mcl/ec.hpp
+++ b/include/mcl/ec.hpp
@@ -693,6 +693,20 @@ public:
 		sub(R, *this, rhs); // QQQ : optimized later
 		return R.isZero();
 	}
+	bool operator<(const EcT& rhs) const
+	{
+		if (isZero()) {
+			return !rhs.isZero();
+		}
+		if (rhs.isZero()) return false;
+		int cmp = Fp::compare(x, rhs.x);
+		if (cmp < 0) return true;
+		if (cmp > 0) return false;
+		return y < rhs.y;
+	}
+	bool operator>=(const EcT& rhs) const { return !operator<(rhs); }
+	bool operator>(const EcT& rhs) const { return rhs < *this; }
+	bool operator<=(const EcT& rhs) const { return !operator>(rhs); }
 	bool operator!=(const EcT& rhs) const { return !operator==(rhs); }
 private:
 	static inline void mulArray(EcT& z, const EcT& x, const fp::Unit *y, size_t yn, bool isNegative)