From 601ee4ba7ae9d9b532dab5f7e757f4187dce6300 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Mon, 13 Jun 2022 16:02:53 +0300
Subject: [PATCH] Use snprintf when available to avoid security warnings (refs
 #25)

---
 include/boost/assert/source_location.hpp | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/include/boost/assert/source_location.hpp b/include/boost/assert/source_location.hpp
index 9ab5c29..cca87e7 100644
--- a/include/boost/assert/source_location.hpp
+++ b/include/boost/assert/source_location.hpp
@@ -73,6 +73,12 @@ public:
 #if defined(BOOST_MSVC)
 # pragma warning( push )
 # pragma warning( disable: 4996 )
+#endif
+
+#if ( defined(_MSC_VER) && _MSC_VER < 1900 ) || ( defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR) )
+# define BOOST_ASSERT_SNPRINTF(buffer, format, arg) std::sprintf(buffer, format, arg)
+#else
+# define BOOST_ASSERT_SNPRINTF(buffer, format, arg) std::snprintf(buffer, sizeof(buffer)/sizeof(buffer[0]), format, arg)
 #endif
 
     std::string to_string() const
@@ -88,14 +94,14 @@ public:
 
         char buffer[ 16 ];
 
-        std::sprintf( buffer, ":%lu", ln );
+        BOOST_ASSERT_SNPRINTF( buffer, ":%lu", ln );
         r += buffer;
 
         unsigned long co = column();
 
         if( co )
         {
-            std::sprintf( buffer, ":%lu", co );
+            BOOST_ASSERT_SNPRINTF( buffer, ":%lu", co );
             r += buffer;
         }
 
@@ -111,6 +117,8 @@ public:
         return r;
     }
 
+#undef BOOST_ASSERT_SNPRINTF
+
 #if defined(BOOST_MSVC)
 # pragma warning( pop )
 #endif