1 // Copyright 2015 The Prometheus Authors
2 // Licensed under the Apache License, Version 2.0 (the "License");
3 // you may not use this file except in compliance with the License.
4 // You may obtain a copy of the License at
6 // http://www.apache.org/licenses/LICENSE-2.0
8 // Unless required by applicable law or agreed to in writing, software
9 // distributed under the License is distributed on an "AS IS" BASIS,
10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 // See the License for the specific language governing permissions and
12 // limitations under the License.
16 // Inline and byte-free variant of hash/fnv's fnv64a.
19 offset64 = 14695981039346656037
20 prime64 = 1099511628211
23 // hashNew initializies a new fnv64a hash value.
24 func hashNew() uint64 {
28 // hashAdd adds a string to a fnv64a hash value, returning the updated hash.
29 func hashAdd(h uint64, s string) uint64 {
30 for i := 0; i < len(s); i++ {
37 // hashAddByte adds a byte to a fnv64a hash value, returning the updated hash.
38 func hashAddByte(h uint64, b byte) uint64 {