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51 lines
1.5 KiB
51 lines
1.5 KiB
namespace UnityEngine.Timeline |
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{ |
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static class HashUtility |
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{ |
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// Note. We could have used "params int[] hashes" but we want to avoid allocating. |
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public static int CombineHash(this int h1, int h2) |
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{ |
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return h1 ^ (int)(h2 + 0x9e3779b9 + (h1 << 6) + (h1 >> 2)); // Similar to c++ boost::hash_combine |
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} |
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public static int CombineHash(int h1, int h2, int h3) |
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{ |
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return CombineHash(h1, h2).CombineHash(h3); |
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} |
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public static int CombineHash(int h1, int h2, int h3, int h4) |
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{ |
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return CombineHash(h1, h2, h3).CombineHash(h4); |
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} |
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public static int CombineHash(int h1, int h2, int h3, int h4, int h5) |
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{ |
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return CombineHash(h1, h2, h3, h4).CombineHash(h5); |
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} |
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public static int CombineHash(int h1, int h2, int h3, int h4, int h5, int h6) |
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{ |
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return CombineHash(h1, h2, h3, h4, h5).CombineHash(h6); |
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} |
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public static int CombineHash(int h1, int h2, int h3, int h4, int h5, int h6, int h7) |
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{ |
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return CombineHash(h1, h2, h3, h4, h5, h6).CombineHash(h7); |
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} |
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public static int CombineHash(int[] hashes) |
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{ |
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if (hashes == null || hashes.Length == 0) |
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return 0; |
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var h = hashes[0]; |
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for (int i = 1; i < hashes.Length; ++i) |
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{ |
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h = CombineHash(h, hashes[i]); |
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} |
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return h; |
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} |
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} |
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}
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