Source is https://github.com/racket/zuo/blob/main/zuo.c https://github.com/racket/zuo/blob/main/zuo.c - skimmed through it, looks like fairly straightforward C.

Source is https://github.com/racket/zuo/blob/main/zuo.c https://github.com/racket/zuo/blob/main/zuo.c - skimmed through it, looks like fairly straightforward C. Quite short implementation.