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#include "int-hash.hpp"
#include <bit>
namespace floormat {
template<typename T, T offset_basis, T prime>
static CORRADE_ALWAYS_INLINE
T FNVHash(const char* str, size_t size)
{
const auto* end = str + size;
T hash = offset_basis;
for (; str != end; ++str)
{
hash *= prime;
hash ^= (uint8_t)*str;
}
return hash;
}
size_t int_hash(uint32_t x) noexcept
{
if constexpr(sizeof(size_t) == 4)
return FNVHash<uint32_t, 0x811c9dc5u, 0x01000193u>((const char*)&x, 4);
else
return int_hash(uint64_t(x));
}
size_t int_hash(uint64_t x) noexcept
{
return FNVHash<uint64_t, 0xcbf29ce484222325u, 0x100000001b3u>((const char*)&x, 8);
}
} // namespace floormat
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