ref: 5c4ffb3f45d3ebc1590c395a603bc60cf81de5a9
dir: /hashing.h/
#pragma once value_t nextipow2(value_t i); uint32_t int32hash(uint32_t a); uint64_t int64hash(uint64_t key); uint32_t int64to32hash(uint64_t key); uint64_t memhash(const char* buf, size_t n); uint32_t memhash32(const char* buf, size_t n);