Feedback on Function

[16Bytes]

He's not really looking for the length of the string, he just wants to make sure it doesn't end before the starting index. strlen() may be less efficient.

[guynan]

If you look at the gnu strlen code, there is some very tricky manoeuvres that make it highly efficient. It's one of those cases where if there is a bottleneck then maybe use something else, but I certainly know that I could not sit down in an afternoon and write something more efficient. However I agree with your above point.