ref: d5fd9c48d7c5542f6059bdb0d65b973249dc474a dir: /src/hashing.h/
#pragma once value_t inthash(value_t a) fl_constfn; uint32_t int64to32hash(uint64_t key) fl_constfn; uint64_t memhash(const char* buf, size_t n);