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Parse glibc strftime %c format (#102)
This change trims day-of-week prefixes before entering into the parsing loop. This corrects parsing of glibc's strftime `%c` timestamps, and should allow significant simplification of the state machine in the future.
This commit is contained in:
Charles Duffy
parent
d820a6159a
commit
661394b510
92
parseany.go
92
parseany.go
@ -17,6 +17,23 @@ import (
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// gou.SetColorOutput()
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// }
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var days = []string{
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"mon",
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"tue",
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"wed",
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"thu",
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"fri",
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"sat",
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"sun",
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"monday",
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"tuesday",
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"wednesday",
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"thursday",
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"friday",
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"saturday",
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"sunday",
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}
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var months = []string{
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"january",
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"february",
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@ -60,6 +77,7 @@ const (
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dateAlphaWsDigitMore
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dateAlphaWsDigitMoreWs
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dateAlphaWsDigitMoreWsYear
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dateAlphaWsDigitYearmaybe
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dateAlphaWsMonth
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dateAlphaWsMonthMore
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dateAlphaWsMonthSuffix
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@ -587,9 +605,21 @@ iterRunes:
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} else {
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// This is possibly ambiguous? May will parse as either though.
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// So, it could return in-correct format.
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// May 05, 2005, 05:05:05
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// May 05 2005, 05:05:05
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// Jul 05, 2005, 05:05:05
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// dateAlphaWs
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// May 05, 2005, 05:05:05
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// May 05 2005, 05:05:05
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// Jul 05, 2005, 05:05:05
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// May 8 17:57:51 2009
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// May 8 17:57:51 2009
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// skip & return to dateStart
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// Tue 05 May 2020, 05:05:05
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// Mon Jan 2 15:04:05 2006
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maybeDay := strings.ToLower(datestr[0:i])
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if isDay(maybeDay) {
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// using skip throws off indices used by other code; saner to restart
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return parseTime(datestr[i+1:], loc)
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}
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p.stateDate = dateAlphaWs
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}
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@ -631,11 +661,14 @@ iterRunes:
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// Mon Jan 02 15:04:05 -0700 2006
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// Fri Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
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// Mon Aug 10 15:44:11 UTC+0100 2015
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// dateAlphaWsDigit
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// May 8, 2009 5:57:51 PM
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// May 8 2009 5:57:51 PM
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// oct 1, 1970
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// oct 7, '70
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// dateAlphaWsDigit
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// May 8, 2009 5:57:51 PM
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// May 8 2009 5:57:51 PM
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// May 8 17:57:51 2009
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// May 8 17:57:51 2009
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// May 08 17:57:51 2009
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// oct 1, 1970
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// oct 7, '70
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switch {
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case unicode.IsLetter(r):
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p.set(0, "Mon")
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@ -653,6 +686,9 @@ iterRunes:
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// oct 1, 1970
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// oct 7, '70
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// oct. 7, 1970
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// May 8 17:57:51 2009
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// May 8 17:57:51 2009
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// May 08 17:57:51 2009
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if r == ',' {
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p.daylen = i - p.dayi
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p.setDay()
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@ -661,11 +697,31 @@ iterRunes:
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p.daylen = i - p.dayi
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p.setDay()
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p.yeari = i + 1
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p.stateDate = dateAlphaWsDigitMoreWs
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p.stateDate = dateAlphaWsDigitYearmaybe
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p.stateTime = timeStart
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} else if unicode.IsLetter(r) {
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p.stateDate = dateAlphaWsMonthSuffix
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i--
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}
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case dateAlphaWsDigitYearmaybe:
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// x
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// May 8 2009 5:57:51 PM
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// May 8 17:57:51 2009
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// May 8 17:57:51 2009
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// May 08 17:57:51 2009
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// Jul 03 2015 18:04:07 GMT+0100 (GMT Daylight Time)
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if r == ':' {
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// Guessed wrong; was not a year
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i = i - 3
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p.stateDate = dateAlphaWsDigit
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p.yeari = 0
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break iterRunes
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} else if r == ' ' {
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// must be year format, not 15:04
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p.yearlen = i - p.yeari
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p.setYear()
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break iterRunes
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}
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case dateAlphaWsDigitMore:
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// x
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// May 8, 2009 5:57:51 PM
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@ -1139,7 +1195,9 @@ iterRunes:
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switch r {
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case ' ':
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p.set(p.offseti, "-0700")
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p.yeari = i + 1
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if p.yeari == 0 {
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p.yeari = i + 1
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}
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p.stateTime = timeWsAlphaZoneOffsetWs
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}
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case timeWsAlphaZoneOffsetWs:
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@ -1630,6 +1688,12 @@ iterRunes:
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case dateAlphaWsAlpha:
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return p, nil
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case dateAlphaWsDigit:
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return p, nil
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case dateAlphaWsDigitYearmaybe:
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return p, nil
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case dateAlphaWsAlphaYearmaybe:
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return p, nil
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@ -1854,6 +1918,14 @@ func (p *parser) parse() (time.Time, error) {
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}
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return time.ParseInLocation(string(p.format), p.datestr, p.loc)
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}
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func isDay(alpha string) bool {
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for _, day := range days {
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if alpha == day {
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return true
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}
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}
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return false
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}
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func isMonthFull(alpha string) bool {
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for _, month := range months {
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if alpha == month {
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@ -42,6 +42,8 @@ var testInputs = []dateTest{
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{in: "7 September 1970", out: "1970-09-07 00:00:00 +0000 UTC"},
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// ANSIC = "Mon Jan _2 15:04:05 2006"
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{in: "Mon Jan 2 15:04:05 2006", out: "2006-01-02 15:04:05 +0000 UTC"},
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// ANSIC_GLIBC = "Mon 02 Jan 2006 03:04:05 PM UTC"
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{in: "Mon 02 Jan 2006 03:04:05 PM UTC", out: "2006-01-02 15:04:05 +0000 UTC"},
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{in: "Thu May 8 17:57:51 2009", out: "2009-05-08 17:57:51 +0000 UTC"},
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{in: "Thu May 8 17:57:51 2009", out: "2009-05-08 17:57:51 +0000 UTC"},
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// RubyDate = "Mon Jan 02 15:04:05 -0700 2006"
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