ae9f97221a
* go-metrics: fork library and introduce ResettingTimer and InfluxDB reporter. * vendor: change nonsense/go-metrics to ethersphere/go-metrics * go-metrics: add tests. move ResettingTimer logic from reporter to type. * all, metrics: pull in metrics package in go-ethereum * metrics/test: make sure metrics are enabled for tests * metrics: apply gosimple rules * metrics/exp, internal/debug: init expvar endpoint when starting pprof server * internal/debug: tiny comment formatting fix
33 lines
820 B
Go
33 lines
820 B
Go
package models // import "github.com/influxdata/influxdb/models"
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// from stdlib hash/fnv/fnv.go
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const (
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prime64 = 1099511628211
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offset64 = 14695981039346656037
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)
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// InlineFNV64a is an alloc-free port of the standard library's fnv64a.
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// See https://en.wikipedia.org/wiki/Fowler%E2%80%93Noll%E2%80%93Vo_hash_function.
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type InlineFNV64a uint64
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// NewInlineFNV64a returns a new instance of InlineFNV64a.
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func NewInlineFNV64a() InlineFNV64a {
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return offset64
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}
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// Write adds data to the running hash.
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func (s *InlineFNV64a) Write(data []byte) (int, error) {
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hash := uint64(*s)
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for _, c := range data {
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hash ^= uint64(c)
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hash *= prime64
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}
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*s = InlineFNV64a(hash)
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return len(data), nil
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}
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// Sum64 returns the uint64 of the current resulting hash.
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func (s *InlineFNV64a) Sum64() uint64 {
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return uint64(*s)
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}
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