forked from mirror/client_golang
35 lines
745 B
Go
35 lines
745 B
Go
// Copyright (c) 2013, Prometheus Team
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// All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package prometheus
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import (
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"fmt"
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"hash/fnv"
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"sort"
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"github.com/prometheus/client_golang/model"
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)
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// LabelsToSignature provides a way of building a unique signature
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// (i.e., fingerprint) for a given label set sequence.
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func labelsToSignature(labels map[string]string) uint64 {
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names := make(model.LabelNames, 0, len(labels))
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for name := range labels {
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names = append(names, model.LabelName(name))
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}
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sort.Sort(names)
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hasher := fnv.New64a()
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for _, name := range names {
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fmt.Fprintf(hasher, string(name), labels[string(name)])
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}
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return hasher.Sum64()
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}
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