VS:added the snprintf fix for jansson

jansson/cmake/jansson_private_config.h.cmake

@@ -49,6 +49,20 @@
 
 #cmakedefine HAVE_SNPRINTF 1
 
+/* snprintf should not be defined as macro with MSC_VER >= 1900 */
+#if defined(_WIN32) || defined(WIN32)
+#  if defined(_MSC_VER)  /* MS compiller */
+#    if (_MSC_VER < 1900)  /* snprintf not introduced */
+#      if !defined(snprintf)
+#        define snprintf _snprintf
+#        define HAVE_SNPRINTF 1 /* snprintf defined manually */
+#      endif
+#    else
+#      define HAVE_SNPRINTF 1 /* snprintf available via sdk */
+#    endif
+#  endif
+#endif
+
 #ifndef HAVE_SNPRINTF
 #  define snprintf @JSON_SNPRINTF@
 #endif

jansson/src/jansson_private.h

@@ -91,9 +91,18 @@ char *jsonp_strdup(const char *str);
 char *jsonp_strndup(const char *str, size_t len);
 
 /* Windows compatibility */
-#ifdef _WIN32
-#define snprintf _snprintf
-#define vsnprintf _vsnprintf
+#if defined(_WIN32) || defined(WIN32)
+#  if defined(_MSC_VER)  /* MS compiller */
+#    if (_MSC_VER < 1900) && !defined(snprintf)  /* snprintf not defined yet & not introduced */
+#      define snprintf _snprintf
+#    endif
+#    if (_MSC_VER < 1500) && !defined(vsnprintf)  /* vsnprintf not defined yet & not introduced */
+#      define vsnprintf(b,c,f,a) _vsnprintf(b,c,f,a)
+#    endif
+#  else  /* Other Windows compiller, old definition */
+#    define snprintf _snprintf
+#    define vsnprintf _vsnprintf
+#  endif
 #endif
 
 #endif