Simplify snprintf and vsnprintf checking for Visual Studio

CMakeLists.txt

@@ -303,16 +303,6 @@ else()
    set (JSON_INLINE)
 endif()
 
-# Find our snprintf
-check_function_exists (snprintf HAVE_SNPRINTF)
-check_function_exists (_snprintf HAVE__SNPRINTF)
-
-if (HAVE_SNPRINTF)
-   set(JSON_SNPRINTF snprintf)
-elseif (HAVE__SNPRINTF)
-   set(JSON_SNPRINTF _snprintf)
-endif () 
-
 check_c_source_compiles ("int main() { unsigned long val; __sync_bool_compare_and_swap(&val, 0, 1); return 0; } " HAVE_SYNC_BUILTINS)
 check_c_source_compiles ("int main() { char l; unsigned long v; __atomic_test_and_set(&l, __ATOMIC_RELAXED); __atomic_store_n(&v, 1, __ATOMIC_RELEASE); __atomic_load_n(&v, __ATOMIC_ACQUIRE); return 0; }" HAVE_ATOMIC_BUILTINS)
 

cmake/jansson_private_config.h.cmake

@@ -47,28 +47,6 @@
 #  define ssize_t @JSON_SSIZE@
 #endif
 
-#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
-
-#cmakedefine HAVE_VSNPRINTF
-
 #cmakedefine USE_URANDOM 1
 #cmakedefine USE_WINDOWS_CRYPTOAPI 1