mirror of
https://github.com/ergochat/ergo.git
synced 2024-12-23 19:22:41 +01:00
83 lines
2.5 KiB
Go
83 lines
2.5 KiB
Go
// Copyright 2017 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
|
|
|
|
package unix
|
|
|
|
import "time"
|
|
|
|
// TimespecToNsec converts a Timespec value into a number of
|
|
// nanoseconds since the Unix epoch.
|
|
func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) }
|
|
|
|
// NsecToTimespec takes a number of nanoseconds since the Unix epoch
|
|
// and returns the corresponding Timespec value.
|
|
func NsecToTimespec(nsec int64) Timespec {
|
|
sec := nsec / 1e9
|
|
nsec = nsec % 1e9
|
|
if nsec < 0 {
|
|
nsec += 1e9
|
|
sec--
|
|
}
|
|
return setTimespec(sec, nsec)
|
|
}
|
|
|
|
// TimeToTimespec converts t into a Timespec.
|
|
// On some 32-bit systems the range of valid Timespec values are smaller
|
|
// than that of time.Time values. So if t is out of the valid range of
|
|
// Timespec, it returns a zero Timespec and ERANGE.
|
|
func TimeToTimespec(t time.Time) (Timespec, error) {
|
|
sec := t.Unix()
|
|
nsec := int64(t.Nanosecond())
|
|
ts := setTimespec(sec, nsec)
|
|
|
|
// Currently all targets have either int32 or int64 for Timespec.Sec.
|
|
// If there were a new target with floating point type for it, we have
|
|
// to consider the rounding error.
|
|
if int64(ts.Sec) != sec {
|
|
return Timespec{}, ERANGE
|
|
}
|
|
return ts, nil
|
|
}
|
|
|
|
// TimevalToNsec converts a Timeval value into a number of nanoseconds
|
|
// since the Unix epoch.
|
|
func TimevalToNsec(tv Timeval) int64 { return int64(tv.Sec)*1e9 + int64(tv.Usec)*1e3 }
|
|
|
|
// NsecToTimeval takes a number of nanoseconds since the Unix epoch
|
|
// and returns the corresponding Timeval value.
|
|
func NsecToTimeval(nsec int64) Timeval {
|
|
nsec += 999 // round up to microsecond
|
|
usec := nsec % 1e9 / 1e3
|
|
sec := nsec / 1e9
|
|
if usec < 0 {
|
|
usec += 1e6
|
|
sec--
|
|
}
|
|
return setTimeval(sec, usec)
|
|
}
|
|
|
|
// Unix returns ts as the number of seconds and nanoseconds elapsed since the
|
|
// Unix epoch.
|
|
func (ts *Timespec) Unix() (sec int64, nsec int64) {
|
|
return int64(ts.Sec), int64(ts.Nsec)
|
|
}
|
|
|
|
// Unix returns tv as the number of seconds and nanoseconds elapsed since the
|
|
// Unix epoch.
|
|
func (tv *Timeval) Unix() (sec int64, nsec int64) {
|
|
return int64(tv.Sec), int64(tv.Usec) * 1000
|
|
}
|
|
|
|
// Nano returns ts as the number of nanoseconds elapsed since the Unix epoch.
|
|
func (ts *Timespec) Nano() int64 {
|
|
return int64(ts.Sec)*1e9 + int64(ts.Nsec)
|
|
}
|
|
|
|
// Nano returns tv as the number of nanoseconds elapsed since the Unix epoch.
|
|
func (tv *Timeval) Nano() int64 {
|
|
return int64(tv.Sec)*1e9 + int64(tv.Usec)*1000
|
|
}
|