What's a good name for...

A function that's like strchr or strrchr, but finds either the first or last character of a string that is NOT equal to the given character?

>>4,5
No, strspn doesn't do what I want, even if I switch the arguments around--it's based on equality. Nor does strcspn do it either, it just returns an offset instead of a pointer.

I'm going to name them as strxchr, strnxchr, strrxchr, strnrxchr, etc.