ladybird/AK/HashFunctions.h
Shannon Booth d5fea1b235 AK: Add a u64 Trait type
This allows u64s to be used in HashMaps.
2020-01-05 09:00:05 +01:00

26 lines
495 B
C

#pragma once
#include "Types.h"
inline unsigned int_hash(u32 key)
{
key += ~(key << 15);
key ^= (key >> 10);
key += (key << 3);
key ^= (key >> 6);
key += ~(key << 11);
key ^= (key >> 16);
return key;
}
inline unsigned pair_int_hash(u32 key1, u32 key2)
{
return int_hash((int_hash(key1) * 209) ^ (int_hash(key2 * 413)));
}
inline unsigned u64_hash(u64 key)
{
u32 first = key & 0xFFFFFFFF;
u32 last = key >> 32;
return pair_int_hash(first, last);
}