First Commit of Voltha-Go-Controller from Radisys
Change-Id: I8e2e908e7ab09a4fe3d86849da18b6d69dcf4ab0
diff --git a/vendor/github.com/google/gopacket/time.go b/vendor/github.com/google/gopacket/time.go
new file mode 100644
index 0000000..6d116cd
--- /dev/null
+++ b/vendor/github.com/google/gopacket/time.go
@@ -0,0 +1,72 @@
+// Copyright 2018 The GoPacket Authors. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style license
+// that can be found in the LICENSE file in the root of the source
+// tree.
+
+package gopacket
+
+import (
+ "fmt"
+ "math"
+ "time"
+)
+
+// TimestampResolution represents the resolution of timestamps in Base^Exponent.
+type TimestampResolution struct {
+ Base, Exponent int
+}
+
+func (t TimestampResolution) String() string {
+ return fmt.Sprintf("%d^%d", t.Base, t.Exponent)
+}
+
+// ToDuration returns the smallest representable time difference as a time.Duration
+func (t TimestampResolution) ToDuration() time.Duration {
+ if t.Base == 0 {
+ return 0
+ }
+ if t.Exponent == 0 {
+ return time.Second
+ }
+ switch t.Base {
+ case 10:
+ return time.Duration(math.Pow10(t.Exponent + 9))
+ case 2:
+ if t.Exponent < 0 {
+ return time.Second >> uint(-t.Exponent)
+ }
+ return time.Second << uint(t.Exponent)
+ default:
+ // this might loose precision
+ return time.Duration(float64(time.Second) * math.Pow(float64(t.Base), float64(t.Exponent)))
+ }
+}
+
+// TimestampResolutionInvalid represents an invalid timestamp resolution
+var TimestampResolutionInvalid = TimestampResolution{}
+
+// TimestampResolutionMillisecond is a resolution of 10^-3s
+var TimestampResolutionMillisecond = TimestampResolution{10, -3}
+
+// TimestampResolutionMicrosecond is a resolution of 10^-6s
+var TimestampResolutionMicrosecond = TimestampResolution{10, -6}
+
+// TimestampResolutionNanosecond is a resolution of 10^-9s
+var TimestampResolutionNanosecond = TimestampResolution{10, -9}
+
+// TimestampResolutionNTP is the resolution of NTP timestamps which is 2^-32 ≈ 233 picoseconds
+var TimestampResolutionNTP = TimestampResolution{2, -32}
+
+// TimestampResolutionCaptureInfo is the resolution used in CaptureInfo, which his currently nanosecond
+var TimestampResolutionCaptureInfo = TimestampResolutionNanosecond
+
+// PacketSourceResolution is an interface for packet data sources that
+// support reporting the timestamp resolution of the aqcuired timestamps.
+// Returned timestamps will always have NanosecondTimestampResolution due
+// to the use of time.Time, but scaling might have occured if acquired
+// timestamps have a different resolution.
+type PacketSourceResolution interface {
+ // Resolution returns the timestamp resolution of acquired timestamps before scaling to NanosecondTimestampResolution.
+ Resolution() TimestampResolution
+}