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tsutil.go
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tsutil.go
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// Package tsutil provides timestamp and time utilities.
package tsutil
import (
"strconv"
"time"
)
const (
// RFC3339Milli is RFC3339 with millisecond precision.
RFC3339Milli = "2006-01-02T15:04:05.000Z07:00"
)
// Millis returns milliseconds since epoch to t.
// Returns 0 if t.IsZero().
func Millis(t time.Time) int64 {
if t.IsZero() {
return 0
}
return int64(t.UnixNano() / int64(time.Millisecond))
}
// NowMillis returns now in milliseconds since epoch.
func NowMillis() int64 {
return Millis(time.Now())
}
// ParseMillis returns time.Time from milliseconds since epoch.
func ParseMillis(i interface{}) time.Time {
switch v := i.(type) {
case string:
n, err := strconv.ParseInt(v, 10, 64)
if err != nil {
return time.Time{}
}
return millis(n)
case int64:
return millis(v)
case int:
return millis(int64(v))
default:
return time.Time{}
}
}
// millis returns time.Time from milliseconds since epoch.
func millis(n int64) time.Time {
if n == 0 {
return time.Time{}
}
return time.Unix(0, n*int64(time.Millisecond)).UTC()
}
// Days returns days since epoch to t.
func Days(t time.Time) int {
ms := Millis(t)
return int(ms / 1000 / 60 / 60 / 24)
}