[DevTools] An snprintf shim for old VS compat

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

Index: third_party/WebKit/Source/platform/v8_inspector/PlatformSTL.h
diff --git a/third_party/WebKit/Source/platform/v8_inspector/PlatformSTL.h b/third_party/WebKit/Source/platform/v8_inspector/PlatformSTL.h
index 15dd63e3eb168a721d8bd2a108f408766b3e46de..dd1fb45a28f0704f33170f86274b262e1c25b79c 100644
--- a/third_party/WebKit/Source/platform/v8_inspector/PlatformSTL.h
+++ b/third_party/WebKit/Source/platform/v8_inspector/PlatformSTL.h
@@ -289,4 +289,23 @@ 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