From 63ab03ca28d13763f7e05dedf3eca90cbf052a64 Mon Sep 17 00:00:00 2001
From: Christopher Dunn <cdunn2001@gmail.com>
Date: Wed, 20 Dec 2017 14:43:55 -0600
Subject: [PATCH] replace code point in range(0xD800, 0xDFFF) to replacement
 mark (#714)

closes #712
---
 src/lib_json/json_writer.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib_json/json_writer.cpp b/src/lib_json/json_writer.cpp
index de26b24..5ffaa15 100644
--- a/src/lib_json/json_writer.cpp
+++ b/src/lib_json/json_writer.cpp
@@ -199,7 +199,7 @@ static unsigned int utf8ToCodepoint(const char*& s, const char* e) {
     s += 2;
     // surrogates aren't valid codepoints itself
     // shouldn't be UTF-8 encoded
-    if (calculated >= 0xD800 && calculated >= 0xDFFF)
+    if (calculated >= 0xD800 && calculated <= 0xDFFF)
       return REPLACEMENT_CHARACTER;
     // oversized encoded characters are invalid
     return calculated < 0x800 ? REPLACEMENT_CHARACTER : calculated;