Платформа ЦРНП "Мирокод" для разработки проектов
https://git.mirocod.ru
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42 lines
1.2 KiB
42 lines
1.2 KiB
// Copyright 2015 The Prometheus Authors |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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package model |
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// Inline and byte-free variant of hash/fnv's fnv64a. |
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const ( |
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offset64 = 14695981039346656037 |
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prime64 = 1099511628211 |
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) |
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// hashNew initializies a new fnv64a hash value. |
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func hashNew() uint64 { |
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return offset64 |
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} |
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// hashAdd adds a string to a fnv64a hash value, returning the updated hash. |
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func hashAdd(h uint64, s string) uint64 { |
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for i := 0; i < len(s); i++ { |
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h ^= uint64(s[i]) |
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h *= prime64 |
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} |
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return h |
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} |
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// hashAddByte adds a byte to a fnv64a hash value, returning the updated hash. |
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func hashAddByte(h uint64, b byte) uint64 { |
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h ^= uint64(b) |
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h *= prime64 |
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return h |
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}
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