sing-box/transport/tuic/congestion/minmax.go

73 lines
1.2 KiB
Go
Raw Normal View History

2023-07-23 06:42:19 +00:00
package congestion
import (
"math"
"time"
"golang.org/x/exp/constraints"
)
// InfDuration is a duration of infinite length
const InfDuration = time.Duration(math.MaxInt64)
func Max[T constraints.Ordered](a, b T) T {
if a < b {
return b
}
return a
}
func Min[T constraints.Ordered](a, b T) T {
if a < b {
return a
}
return b
}
// MinNonZeroDuration return the minimum duration that's not zero.
func MinNonZeroDuration(a, b time.Duration) time.Duration {
if a == 0 {
return b
}
if b == 0 {
return a
}
return Min(a, b)
}
// AbsDuration returns the absolute value of a time duration
func AbsDuration(d time.Duration) time.Duration {
if d >= 0 {
return d
}
return -d
}
// MinTime returns the earlier time
func MinTime(a, b time.Time) time.Time {
if a.After(b) {
return b
}
return a
}
// MinNonZeroTime returns the earlist time that is not time.Time{}
// If both a and b are time.Time{}, it returns time.Time{}
func MinNonZeroTime(a, b time.Time) time.Time {
if a.IsZero() {
return b
}
if b.IsZero() {
return a
}
return MinTime(a, b)
}
// MaxTime returns the later time
func MaxTime(a, b time.Time) time.Time {
if a.After(b) {
return a
}
return b
}