Initial QSfera import

Server/vendor/github.com/segmentio/kafka-go/time.go

@@ -0,0 +1,58 @@
+package kafka
+
+import (
+	"math"
+	"time"
+)
+
+const (
+	maxTimeout = time.Duration(math.MaxInt32) * time.Millisecond
+	minTimeout = time.Duration(math.MinInt32) * time.Millisecond
+	defaultRTT = 1 * time.Second
+)
+
+func makeTime(t int64) time.Time {
+	if t <= 0 {
+		return time.Time{}
+	}
+	return time.Unix(t/1000, (t%1000)*int64(time.Millisecond)).UTC()
+}
+
+func timestamp(t time.Time) int64 {
+	if t.IsZero() {
+		return 0
+	}
+	return t.UnixNano() / int64(time.Millisecond)
+}
+
+func makeDuration(ms int32) time.Duration {
+	return time.Duration(ms) * time.Millisecond
+}
+
+func milliseconds(d time.Duration) int32 {
+	switch {
+	case d > maxTimeout:
+		d = maxTimeout
+	case d < minTimeout:
+		d = minTimeout
+	}
+	return int32(d / time.Millisecond)
+}
+
+func deadlineToTimeout(deadline time.Time, now time.Time) time.Duration {
+	if deadline.IsZero() {
+		return maxTimeout
+	}
+	return deadline.Sub(now)
+}
+
+func adjustDeadlineForRTT(deadline time.Time, now time.Time, rtt time.Duration) time.Time {
+	if !deadline.IsZero() {
+		timeout := deadline.Sub(now)
+		if timeout < rtt {
+			rtt = timeout / 4
+		}
+		deadline = deadline.Add(-rtt)
+	}
+	return deadline
+}