Temp-Classes/rage/joaat.hpp

28 lines
494 B
C++

#pragma once
#include <cstdint>
#include <string_view>
namespace rage
{
using joaat_t = std::uint32_t;
inline constexpr char joaat_to_lower(char c)
{
return (c >= 'A' && c <= 'Z') ? c + ('a' - 'A') : c;
}
inline joaat_t joaat(std::string_view str)
{
joaat_t hash = 0;
for (auto c : str) {
hash += joaat_to_lower(c);
hash += (hash << 10);
hash ^= (hash >> 6);
}
hash += (hash << 3);
hash ^= (hash >> 11);
hash += (hash << 15);
return hash;
}
};