* Jeff Law: >> Is this new in C11? Does it apply to functions such as strnlen as well?
> No, it's C99 I think. There was a clarification which came in after > C99 which clarified that even if the length is zero, the pointers must > still be valid. Okay, I found the language in sections 7.1.4 and 7.21.1 (thanks Marc). This is a bit unfortunate because it interoperates poorly with std::vector<T>::data(), which can return a null pointer if the vector is empty.
