1 files changed, 44 insertions, 0 deletions
diff --git a/src/config.cc b/src/config.cc
new file mode 100644
index 00000000..e9dc087f
--- /dev/null
+++ b/src/config.cc
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2016 WebAssembly Community Group participants
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "config.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+
+/* c99-style vsnprintf for MSVC < 2015. See http://stackoverflow.com/a/8712996
+ using _snprintf or vsnprintf will not-properly null-terminate, and will return
+ -1 instead of the number of characters needed on overflow. */
+#if COMPILER_IS_MSVC
+int wabt_vsnprintf(char* str, size_t size, const char* format, va_list ap) {
+  int result = -1;
+  if (size != 0)
+    result = _vsnprintf_s(str, size, _TRUNCATE, format, ap);
+  if (result == -1)
+    result = _vscprintf(format, ap);
+  return result;
+}
+
+#if !HAVE_SNPRINTF
+int wabt_snprintf(char* str, size_t size, const char* format, ...) {
+  va_list args;
+  va_start(args, format);
+  int result = wabt_vsnprintf(str, size, format, args);
+  va_end(args);
+  return result;
+}
+#endif
+#endif