mirror of
https://github.com/zhenyan121/Cubed.git
synced 2026-06-17 16:17:02 +08:00
33 lines
734 B
C++
33 lines
734 B
C++
#pragma once
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#include <string_view>
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#include <cstdint>
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namespace Cubed {
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namespace HASH {
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inline std::size_t str(std::string_view value) {
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return std::hash<std::string_view>{}(value);
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}
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inline uint32_t mix_hash(int32_t a, int32_t b, uint32_t fixed_seed) {
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uint32_t h = fixed_seed;
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h ^= (uint32_t)a * 0xcc9e2d51u;
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h = (h << 15) | (h >> 17); // rotl 15
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h *= 0x1b873593u;
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h ^= (uint32_t)b * 0xcc9e2d51u;
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h = (h << 15) | (h >> 17); // rotl 15
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h *= 0x1b873593u;
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// Finalization（avalanche）
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h ^= h >> 16;
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h *= 0x85ebca6bu;
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h ^= h >> 13;
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h *= 0xc2b2ae35u;
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h ^= h >> 16;
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return h;
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}
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}
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} |