[DevTools] An snprintf shim for old VS compat

third_party/WebKit/Source/platform/v8_inspector/PlatformSTL.h

 // Copyright (c) 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PlatformSTL_h
 #define PlatformSTL_h
 
 #include <memory>
 
 #define PLATFORM_EXPORT
@@ skipping 271 matching lines @@
 }
 
 #endif // defined(__APPLE__) && !defined(_LIBCPP_VERSION)
 
 template <typename T>
 std::unique_ptr<T> wrapUnique(T* ptr)
 {
     return std::unique_ptr<T>(ptr);
 }
 
+// emulate snprintf() on windows, _snprintf() doesn't zero-terminate the buffer
+// on overflow...
+// VS 2015 added a standard conform snprintf
+#if defined(_WIN32) && defined( _MSC_VER ) && (_MSC_VER < 1900)
+#include <stdarg.h>
+namespace std {
+
+inline static int snprintf(char *buffer, size_t n, const char *format, ...)
+{
+    va_list argp;
+    va_start(argp, format);
+    int ret = _vscprintf(format, argp);
+    vsnprintf_s(buffer, n, _TRUNCATE, format, argp);
+    va_end(argp);
+    return ret;
+}
+} // namespace std
+#endif // (_WIN32) && defined( _MSC_VER ) && (_MSC_VER < 1900)
+
 #endif // PlatformSTL_h