Created
October 14, 2019 15:27
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Murmur Hash for a ReadonlyMemory
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| public int GetHashCode(ReadOnlyMemory<char> source) | |
| { | |
| uint c1 = 0xcc9e2d51; | |
| uint c2 = 0x1b873593; | |
| uint m = 5; | |
| uint n = 0xe6546b64; | |
| uint hash = 42; | |
| foreach (var charItem in source.Span) | |
| { | |
| uint k = (uint)charItem; | |
| k *= c1; | |
| k = (k << 15) | (k >> 17); | |
| k *= c2; | |
| hash ^= k; | |
| hash = (hash << 13) | (hash >> 19); | |
| hash = (hash * m) + n; | |
| } | |
| hash ^= (uint)source.Length; | |
| hash ^= (hash >> 16); | |
| hash *= 0x85ebca6b; | |
| hash ^= (hash >> 13); | |
| hash *= 0xc2b2ae35; | |
| hash ^= (hash >> 16); | |
| return (int)hash; | |
| } |
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