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time: fix handling of -07, handle Z07

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The existing code has partial support for -07 (just the hours of a time
zone offset).  Complete the support, add support for Z07, and add a few
tests.

Fixes #13426.

Change-Id: Ic6377bbf3e65b4bb761b9779f7e80c07ce4f57e8
Reviewed-on: https://go-review.googlesource.com/17260
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Ian Lance Taylor 2015-11-30 09:21:34 -08:00
parent 38f8e4407c
commit 3b3f422afe
2 changed files with 17 additions and 6 deletions
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20
src/time/format.go
View File

@ -34,11 +34,13 @@ import "errors"
// Numeric time zone offsets format as follows:
// -0700 ±hhmm
// -07:00 ±hh:mm
// -07 ±hh
// Replacing the sign in the format with a Z triggers
// the ISO 8601 behavior of printing Z instead of an
// offset for the UTC zone. Thus:
// Z0700 Z or ±hhmm
// Z07:00 Z or ±hh:mm
// Z07 Z or ±hh
//
// The executable example for time.Format demonstrates the working
// of the layout string in detail and is a good reference.
@ -86,6 +88,7 @@ const (
stdTZ = iota // "MST"
stdISO8601TZ // "Z0700" // prints Z for UTC
stdISO8601SecondsTZ // "Z070000"
stdISO8601ShortTZ // "Z07"
stdISO8601ColonTZ // "Z07:00" // prints Z for UTC
stdISO8601ColonSecondsTZ // "Z07:00:00"
stdNumTZ // "-0700" // always numeric
@ -220,6 +223,9 @@ func nextStdChunk(layout string) (prefix string, std int, suffix string) {
if len(layout) >= i+6 && layout[i:i+6] == "Z07:00" {
return layout[0:i], stdISO8601ColonTZ, layout[i+6:]
}
if len(layout) >= i+3 && layout[i:i+3] == "Z07" {
return layout[0:i], stdISO8601ShortTZ, layout[i+3:]
}
case '.': // .000 or .999 - repeated digits for fractional seconds.
if i+1 < len(layout) && (layout[i+1] == '0' || layout[i+1] == '9') {
@ -537,10 +543,10 @@ func (t Time) AppendFormat(b []byte, layout string) []byte {
} else {
b = append(b, "am"...)
}
case stdISO8601TZ, stdISO8601ColonTZ, stdISO8601SecondsTZ, stdISO8601ColonSecondsTZ, stdNumTZ, stdNumColonTZ, stdNumSecondsTz, stdNumColonSecondsTZ:
case stdISO8601TZ, stdISO8601ColonTZ, stdISO8601SecondsTZ, stdISO8601ShortTZ, stdISO8601ColonSecondsTZ, stdNumTZ, stdNumColonTZ, stdNumSecondsTz, stdNumShortTZ, stdNumColonSecondsTZ:
// Ugly special case. We cheat and take the "Z" variants
// to mean "the time zone as formatted for ISO 8601".
if offset == 0 && (std == stdISO8601TZ || std == stdISO8601ColonTZ || std == stdISO8601SecondsTZ || std == stdISO8601ColonSecondsTZ) {
if offset == 0 && (std == stdISO8601TZ || std == stdISO8601ColonTZ || std == stdISO8601SecondsTZ || std == stdISO8601ShortTZ || std == stdISO8601ColonSecondsTZ) {
b = append(b, 'Z')
break
}
@ -557,7 +563,9 @@ func (t Time) AppendFormat(b []byte, layout string) []byte {
if std == stdISO8601ColonTZ || std == stdNumColonTZ || std == stdISO8601ColonSecondsTZ || std == stdNumColonSecondsTZ {
b = append(b, ':')
}
b = appendInt(b, zone%60, 2)
if std != stdNumShortTZ && std != stdISO8601ShortTZ {
b = appendInt(b, zone%60, 2)
}
// append seconds if appropriate
if std == stdISO8601SecondsTZ || std == stdNumSecondsTz || std == stdNumColonSecondsTZ || std == stdISO8601ColonSecondsTZ {
@ -871,8 +879,8 @@ func parse(layout, value string, defaultLocation, local *Location) (Time, error)
default:
err = errBad
}
case stdISO8601TZ, stdISO8601ColonTZ, stdISO8601SecondsTZ, stdISO8601ColonSecondsTZ, stdNumTZ, stdNumShortTZ, stdNumColonTZ, stdNumSecondsTz, stdNumColonSecondsTZ:
if (std == stdISO8601TZ || std == stdISO8601ColonTZ) && len(value) >= 1 && value[0] == 'Z' {
case stdISO8601TZ, stdISO8601ColonTZ, stdISO8601SecondsTZ, stdISO8601ShortTZ, stdISO8601ColonSecondsTZ, stdNumTZ, stdNumShortTZ, stdNumColonTZ, stdNumSecondsTz, stdNumColonSecondsTZ:
if (std == stdISO8601TZ || std == stdISO8601ShortTZ || std == stdISO8601ColonTZ) && len(value) >= 1 && value[0] == 'Z' {
value = value[1:]
z = UTC
break
@ -888,7 +896,7 @@ func parse(layout, value string, defaultLocation, local *Location) (Time, error)
break
}
sign, hour, min, seconds, value = value[0:1], value[1:3], value[4:6], "00", value[6:]
} else if std == stdNumShortTZ {
} else if std == stdNumShortTZ || std == stdISO8601ShortTZ {
if len(value) < 3 {
err = errBad
break

3
src/time/format_test.go
View File

@ -504,6 +504,9 @@ var secondsTimeZoneOffsetTests = []SecondsTimeZoneOffsetTest{
{"2006-01-02T15:04:05-07:00:00", "1871-01-01T05:33:02+00:34:08", 34*60 + 8},
{"2006-01-02T15:04:05Z070000", "1871-01-01T05:33:02-003408", -(34*60 + 8)},
{"2006-01-02T15:04:05Z07:00:00", "1871-01-01T05:33:02+00:34:08", 34*60 + 8},
{"2006-01-02T15:04:05-07", "1871-01-01T05:33:02+01", 1 * 60 * 60},
{"2006-01-02T15:04:05-07", "1871-01-01T05:33:02-02", -2 * 60 * 60},
{"2006-01-02T15:04:05Z07", "1871-01-01T05:33:02-02", -2 * 60 * 60},
}
func TestParseSecondsInTimeZone(t *testing.T) {