From 315f45a0454086f0e2cd3d9d84a5f2cdbc4c8495 Mon Sep 17 00:00:00 2001
From: Thiago Farina <tfarina@chromium.org>
Date: Fri, 26 Feb 2016 19:47:21 -0300
Subject: [PATCH] add dns_toupper() helper function

This patch adds a ASCII version of toupper() function, called
dns_toupper(), and use it in place of toupper().

This fixes issue #3425
---
 pdns/misc.hh | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/pdns/misc.hh b/pdns/misc.hh
index 8d788dcdf..d9e6f9f8c 100644
--- a/pdns/misc.hh
+++ b/pdns/misc.hh
@@ -244,6 +244,13 @@ inline char dns_tolower(char c)
   return c;
 }
 
+inline char dns_toupper(char c)
+{
+  if(c>='a' && c<='z')
+    c+='A'-'a';
+  return c;
+}
+
 inline const string toLower(const string &upper)
 {
   string reply(upper);
@@ -281,7 +288,7 @@ inline string toUpper( const string& s )
 {
         string r(s);
         for( unsigned int i = 0; i < s.length(); i++ ) {
-        	r[i] = toupper( r[i] );
+          r[i] = dns_toupper(r[i]);
         }
         return r;
 }
-- 
2.40.0