Strtok_r() is usually available as is the case for the other lib functions with global state. If not, it is a simple function to clone with whatever improvement

Strtok_r() is usually available as is the case for the other lib functions with global state. If not, it is a simple function to clone with whatever improvements you wish. I have a version that doesn't insert NULs so it can be used on read-only strings.