Initial QSfera import

Server/vendor/go.opentelemetry.io/contrib/zpages/boundaries.go

@@ -0,0 +1,50 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package zpages // import "go.opentelemetry.io/contrib/zpages"
+
+import (
+	"slices"
+	"time"
+)
+
+const (
+	zeroDuration = time.Duration(0)
+	maxDuration  = time.Duration(1<<63 - 1)
+)
+
+var defaultBoundaries = newBoundaries([]time.Duration{
+	10 * time.Microsecond,
+	100 * time.Microsecond,
+	time.Millisecond,
+	10 * time.Millisecond,
+	100 * time.Millisecond,
+	time.Second,
+	10 * time.Second,
+	100 * time.Second,
+})
+
+// boundaries represents the interval bounds for the latency based samples.
+type boundaries struct {
+	durations []time.Duration
+}
+
+// newBoundaries returns a new boundaries.
+func newBoundaries(durations []time.Duration) *boundaries {
+	slices.Sort(durations)
+	return &boundaries{durations: durations}
+}
+
+// numBuckets returns the number of buckets needed for these boundaries.
+func (lb boundaries) numBuckets() int {
+	return len(lb.durations) + 1
+}
+
+// getBucketIndex returns the appropriate bucket index for a given latency.
+func (lb boundaries) getBucketIndex(latency time.Duration) int {
+	i := 0
+	for i < len(lb.durations) && latency >= lb.durations[i] {
+		i++
+	}
+	return i
+}