ref: 09f8117ea12325c84223b1a9343751c8c8cbe30f dir: /src/hashing.h/
#pragma once value_t inthash(value_t a) sl_constfn; uint32_t int64to32hash(uint64_t key) sl_constfn; uint64_t memhash(const char* buf, size_t n);