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time: add nanoseconds to the Time structure.

Browse Source 
R=golang-dev, dsymonds, bradfitz, kevlar, rsc, r
CC=golang-dev
https://golang.org/cl/4851041
This commit is contained in:
Rob Pike 2011-08-05 13:44:02 +10:00
parent 5da14d1697
commit bfaa175e09
2 changed files with 109 additions and 23 deletions
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30
src/pkg/time/time.go
View File

@ -21,6 +21,7 @@ type Time struct {
Year int64 // 2006 is 2006
Month, Day int // Jan-2 is 1, 2
Hour, Minute, Second int // 15:04:05 is 15, 4, 5.
Nanosecond int // Fractional second.
Weekday int // Sunday, Monday, ...
ZoneOffset int // seconds east of UTC, e.g. -7*60*60 for -0700
Zone string // e.g., "MST"
@ -128,8 +129,19 @@ func SecondsToUTC(sec int64) *Time {
return t
}
// NanosecondsToUTC converts nsec, in number of nanoseconds since the Unix epoch,
// into a parsed Time value in the UTC time zone.
func NanosecondsToUTC(nsec int64) *Time {
// This one calls SecondsToUTC rather than the other way around because
// that admits a much larger span of time; NanosecondsToUTC is limited
// to a few hundred years only.
t := SecondsToUTC(nsec / 1e9)
t.Nanosecond = int(nsec % 1e9)
return t
}
// UTC returns the current time as a parsed Time value in the UTC time zone.
func UTC() *Time { return SecondsToUTC(Seconds()) }
func UTC() *Time { return NanosecondsToUTC(Nanoseconds()) }
// SecondsToLocalTime converts sec, in number of seconds since the Unix epoch,
// into a parsed Time value in the local time zone.
@ -141,8 +153,16 @@ func SecondsToLocalTime(sec int64) *Time {
return t
}
// NanosecondsToLocalTime converts nsec, in number of nanoseconds since the Unix epoch,
// into a parsed Time value in the local time zone.
func NanosecondsToLocalTime(nsec int64) *Time {
t := SecondsToLocalTime(nsec / 1e9)
t.Nanosecond = int(nsec % 1e9)
return t
}
// LocalTime returns the current time as a parsed Time value in the local time zone.
func LocalTime() *Time { return SecondsToLocalTime(Seconds()) }
func LocalTime() *Time { return NanosecondsToLocalTime(Nanoseconds()) }
// Seconds returns the number of seconds since January 1, 1970 represented by the
// parsed Time value.
@ -202,3 +222,9 @@ func (t *Time) Seconds() int64 {
sec -= int64(t.ZoneOffset)
return sec
}
// Nanoseconds returns the number of nanoseconds since January 1, 1970 represented by the
// parsed Time value.
func (t *Time) Nanoseconds() int64 {
return t.Seconds()*1e9 + int64(t.Nanosecond)
}

102
src/pkg/time/time_test.go
View File

@ -37,21 +37,31 @@ type TimeTest struct {
}
var utctests = []TimeTest{
{0, Time{1970, 1, 1, 0, 0, 0, Thursday, 0, "UTC"}},
{1221681866, Time{2008, 9, 17, 20, 4, 26, Wednesday, 0, "UTC"}},
{-1221681866, Time{1931, 4, 16, 3, 55, 34, Thursday, 0, "UTC"}},
{-11644473600, Time{1601, 1, 1, 0, 0, 0, Monday, 0, "UTC"}},
{599529660, Time{1988, 12, 31, 0, 1, 0, Saturday, 0, "UTC"}},
{978220860, Time{2000, 12, 31, 0, 1, 0, Sunday, 0, "UTC"}},
{1e18, Time{31688740476, 10, 23, 1, 46, 40, Friday, 0, "UTC"}},
{-1e18, Time{-31688736537, 3, 10, 22, 13, 20, Tuesday, 0, "UTC"}},
{0x7fffffffffffffff, Time{292277026596, 12, 4, 15, 30, 7, Sunday, 0, "UTC"}},
{-0x8000000000000000, Time{-292277022657, 1, 27, 8, 29, 52, Sunday, 0, "UTC"}},
{0, Time{1970, 1, 1, 0, 0, 0, 0, Thursday, 0, "UTC"}},
{1221681866, Time{2008, 9, 17, 20, 4, 26, 0, Wednesday, 0, "UTC"}},
{-1221681866, Time{1931, 4, 16, 3, 55, 34, 0, Thursday, 0, "UTC"}},
{-11644473600, Time{1601, 1, 1, 0, 0, 0, 0, Monday, 0, "UTC"}},
{599529660, Time{1988, 12, 31, 0, 1, 0, 0, Saturday, 0, "UTC"}},
{978220860, Time{2000, 12, 31, 0, 1, 0, 0, Sunday, 0, "UTC"}},
{1e18, Time{31688740476, 10, 23, 1, 46, 40, 0, Friday, 0, "UTC"}},
{-1e18, Time{-31688736537, 3, 10, 22, 13, 20, 0, Tuesday, 0, "UTC"}},
{0x7fffffffffffffff, Time{292277026596, 12, 4, 15, 30, 7, 0, Sunday, 0, "UTC"}},
{-0x8000000000000000, Time{-292277022657, 1, 27, 8, 29, 52, 0, Sunday, 0, "UTC"}},
}
var nanoutctests = []TimeTest{
{0, Time{1970, 1, 1, 0, 0, 0, 1e8, Thursday, 0, "UTC"}},
{1221681866, Time{2008, 9, 17, 20, 4, 26, 2e8, Wednesday, 0, "UTC"}},
}
var localtests = []TimeTest{
{0, Time{1969, 12, 31, 16, 0, 0, Wednesday, -8 * 60 * 60, "PST"}},
{1221681866, Time{2008, 9, 17, 13, 4, 26, Wednesday, -7 * 60 * 60, "PDT"}},
{0, Time{1969, 12, 31, 16, 0, 0, 0, Wednesday, -8 * 60 * 60, "PST"}},
{1221681866, Time{2008, 9, 17, 13, 4, 26, 0, Wednesday, -7 * 60 * 60, "PDT"}},
}
var nanolocaltests = []TimeTest{
{0, Time{1969, 12, 31, 16, 0, 0, 1e8, Wednesday, -8 * 60 * 60, "PST"}},
{1221681866, Time{2008, 9, 17, 13, 4, 26, 3e8, Wednesday, -7 * 60 * 60, "PDT"}},
}
func same(t, u *Time) bool {
@ -61,15 +71,16 @@ func same(t, u *Time) bool {
t.Hour == u.Hour &&
t.Minute == u.Minute &&
t.Second == u.Second &&
t.Nanosecond == u.Nanosecond &&
t.Weekday == u.Weekday &&
t.ZoneOffset == u.ZoneOffset &&
t.Zone == u.Zone
}
func TestSecondsToUTC(t *testing.T) {
for i := 0; i < len(utctests); i++ {
sec := utctests[i].seconds
golden := &utctests[i].golden
for _, test := range utctests {
sec := test.seconds
golden := &test.golden
tm := SecondsToUTC(sec)
newsec := tm.Seconds()
if newsec != sec {
@ -83,10 +94,27 @@ func TestSecondsToUTC(t *testing.T) {
}
}
func TestNanosecondsToUTC(t *testing.T) {
for _, test := range nanoutctests {
golden := &test.golden
nsec := test.seconds*1e9 + int64(golden.Nanosecond)
tm := NanosecondsToUTC(nsec)
newnsec := tm.Nanoseconds()
if newnsec != nsec {
t.Errorf("NanosecondsToUTC(%d).Nanoseconds() = %d", nsec, newnsec)
}
if !same(tm, golden) {
t.Errorf("NanosecondsToUTC(%d):", nsec)
t.Errorf(" want=%+v", *golden)
t.Errorf(" have=%+v", *tm)
}
}
}
func TestSecondsToLocalTime(t *testing.T) {
for i := 0; i < len(localtests); i++ {
sec := localtests[i].seconds
golden := &localtests[i].golden
for _, test := range localtests {
sec := test.seconds
golden := &test.golden
tm := SecondsToLocalTime(sec)
newsec := tm.Seconds()
if newsec != sec {
@ -100,6 +128,23 @@ func TestSecondsToLocalTime(t *testing.T) {
}
}
func TestNanoecondsToLocalTime(t *testing.T) {
for _, test := range nanolocaltests {
golden := &test.golden
nsec := test.seconds*1e9 + int64(golden.Nanosecond)
tm := NanosecondsToLocalTime(nsec)
newnsec := tm.Nanoseconds()
if newnsec != nsec {
t.Errorf("NanosecondsToLocalTime(%d).Seconds() = %d", nsec, newnsec)
}
if !same(tm, golden) {
t.Errorf("NanosecondsToLocalTime(%d):", nsec)
t.Errorf(" want=%+v", *golden)
t.Errorf(" have=%+v", *tm)
}
}
}
func TestSecondsToUTCAndBack(t *testing.T) {
f := func(sec int64) bool { return SecondsToUTC(sec).Seconds() == sec }
f32 := func(sec int32) bool { return f(int64(sec)) }
@ -114,15 +159,30 @@ func TestSecondsToUTCAndBack(t *testing.T) {
}
}
func TestNanosecondsToUTCAndBack(t *testing.T) {
f := func(nsec int64) bool { return NanosecondsToUTC(nsec).Nanoseconds() == nsec }
f32 := func(nsec int32) bool { return f(int64(nsec)) }
cfg := &quick.Config{MaxCount: 10000}
// Try a small date first, then the large ones. (The span is only a few hundred years
// for nanoseconds in an int64.)
if err := quick.Check(f32, cfg); err != nil {
t.Fatal(err)
}
if err := quick.Check(f, cfg); err != nil {
t.Fatal(err)
}
}
type TimeFormatTest struct {
time Time
formattedValue string
}
var rfc3339Formats = []TimeFormatTest{
{Time{2008, 9, 17, 20, 4, 26, Wednesday, 0, "UTC"}, "2008-09-17T20:04:26Z"},
{Time{1994, 9, 17, 20, 4, 26, Wednesday, -18000, "EST"}, "1994-09-17T20:04:26-05:00"},
{Time{2000, 12, 26, 1, 15, 6, Wednesday, 15600, "OTO"}, "2000-12-26T01:15:06+04:20"},
{Time{2008, 9, 17, 20, 4, 26, 0, Wednesday, 0, "UTC"}, "2008-09-17T20:04:26Z"},
{Time{1994, 9, 17, 20, 4, 26, 0, Wednesday, -18000, "EST"}, "1994-09-17T20:04:26-05:00"},
{Time{2000, 12, 26, 1, 15, 6, 0, Wednesday, 15600, "OTO"}, "2000-12-26T01:15:06+04:20"},
}
func TestRFC3339Conversion(t *testing.T) {