Hash.hpp

#pragma once
 
#include "IntTypes.hpp"
 
namespace Grindstone {
    using HashValue = Uint64;
 
    namespace Hash {
        constexpr HashValue MurmurOAAT64(const wchar_t* key);
    };
 
    constexpr HashValue Hash::MurmurOAAT64(const wchar_t* key) {
        HashValue h(525201411107845655ull);
        for (; *key; ++key) {
            h ^= *key;
            h *= 0x5bd1e9955bd1e995;
            h ^= h >> 47;
        }
        return h;
    }
}