From 43245166ca6dedbf0f9a67098877ab9d0519bbc0 Mon Sep 17 00:00:00 2001
From: weidai <weidai11@users.noreply.github.com>
Date: Thu, 22 Oct 2009 09:04:40 +0000
Subject: [PATCH] honor uppercase/lowercase in operator<<() (Jeff Walton)

---
 gf2n.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/gf2n.cpp b/gf2n.cpp
index 0fac46a8..bcc56071 100644
--- a/gf2n.cpp
+++ b/gf2n.cpp
@@ -482,7 +482,10 @@ std::ostream& operator<<(std::ostream& out, const PolynomialMod2 &a)
 
 	SecBlock<char> s(a.BitCount()/bits+1);
 	unsigned i;
-	const char vec[]="0123456789ABCDEF";
+
+	static const char upper[]="0123456789ABCDEF";
+	static const char lower[]="0123456789abcdef";
+	const char* vec = (out.flags() & std::ios::uppercase) ? upper : lower;
 
 	for (i=0; i*bits < a.BitCount(); i++)
 	{