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https://github.com/araddon/dateparse.git
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revamp state types
This commit is contained in:
Aaron Raddon
parent
69569e0631
commit
3706ed61ad
103
parseany.go
103
parseany.go
@ -9,8 +9,25 @@ import (
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"unicode/utf8"
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)
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type DateState int
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const (
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ST_START uint64 = 1
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ST_START DateState = iota
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ST_DIGIT
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ST_DIGITDASH
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ST_DIGITDASHWS
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ST_DIGITDASHT
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ST_DIGITCOMMA
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ST_DIGITCOLON
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ST_DIGITSLASH
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ST_DIGITSLASHWS
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ST_DIGITSLASHWSCOLON
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ST_DIGITSLASHWSCOLONCOLON
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ST_ALPHA
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ST_ALPHAWS
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ST_ALPHAWSCOMMA
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ST_ALPHACOMMA
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//ST_ALPHADIGIT
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)
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var _ = u.EMPTY
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@ -18,7 +35,7 @@ var _ = u.EMPTY
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// Given an unknown date format, detect the type, parse, return time
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func ParseAny(datestr string) (time.Time, error) {
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var state uint64 = 1
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state := ST_START
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iterRunes:
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for i := 0; i < len(datestr); i++ {
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@ -28,27 +45,27 @@ iterRunes:
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switch state {
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case ST_START:
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if unicode.IsDigit(r) {
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state = state << 1 // 2
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state = ST_DIGIT
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} else if unicode.IsLetter(r) {
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state = state << 2 // 4
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state = ST_ALPHA
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}
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case 2: // starts digit 1 << 2
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case ST_DIGIT: // starts digits
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if unicode.IsDigit(r) {
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continue
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}
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switch r {
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case ' ':
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state = state << 3
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state = ST_DIGITDASHWS
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case ',':
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state = state << 4
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state = ST_DIGITCOMMA
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case '-':
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state = state << 5
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state = ST_DIGITDASH
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case ':':
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state = state << 6
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state = ST_DIGITCOLON
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case '/':
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state = state << 7
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state = ST_DIGITSLASH
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}
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case 64: // starts digit then dash 02- 1 << 2 << 5
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case ST_DIGITDASH: // starts digit then dash 02-
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// 2006-01-02T15:04:05Z07:00
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// 2006-01-02T15:04:05.999999999Z07:00
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// 2012-08-03 18:31:59.257000000
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@ -60,11 +77,11 @@ iterRunes:
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// 2014-04-26 05:24:37 PM
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switch {
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case r == ' ':
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state = state + 1
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state = ST_DIGITDASHWS
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case r == 'T':
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state = state + 3
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state = ST_DIGITDASHT
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}
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case 65: // starts digit then dash 02- then whitespace 1 << 2 << 5 + 1
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case ST_DIGITDASHWS: // starts digit then dash 02- then whitespace
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// 2014-04-26 17:24:37.3186369
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// 2012-08-03 18:31:59.257000000
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// 2016-03-14 00:00:00.000
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@ -94,7 +111,7 @@ iterRunes:
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}
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}
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}
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case 67: // starts digit then dash 02- then T 1 << 2 << 5 + 3
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case ST_DIGITDASHT: // starts digit then dash 02- then T
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// 2006-01-02T15:04:05Z07:00
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// 2006-01-02T15:04:05.999999999Z07:00
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if len(datestr) == len("2006-01-02T15:04:05Z07:00") {
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@ -110,7 +127,7 @@ iterRunes:
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u.Error(err)
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}
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}
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case 256: // starts digit then slash 02/
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case ST_DIGITSLASH: // starts digit then slash 02/
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// 03/19/2012 10:11:59
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// 04/2/2014 03:00:37
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// 3/1/2012 10:11:59
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@ -123,49 +140,55 @@ iterRunes:
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}
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switch r {
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case ' ':
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state = state << 3
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state = ST_DIGITSLASHWS
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}
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case 2048: // starts digit then slash 02/ more digits/slashes then whitespace
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case ST_DIGITSLASHWS: // starts digit then slash 02/ more digits/slashes then whitespace
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// 03/19/2012 10:11:59
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// 04/2/2014 03:00:37
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// 3/1/2012 10:11:59
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// 4/8/2014 22:05
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switch r {
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case ':':
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state = state << 8
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state = ST_DIGITSLASHWSCOLON
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}
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case 524288: // starts digit then slash 02/ more digits/slashes then whitespace
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case ST_DIGITSLASHWSCOLON: // starts digit then slash 02/ more digits/slashes then whitespace
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// 03/19/2012 10:11:59
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// 04/2/2014 03:00:37
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// 3/1/2012 10:11:59
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// 4/8/2014 22:05
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switch r {
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case ':':
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state = state << 9
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state = ST_DIGITSLASHWSCOLONCOLON
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}
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case 4: // starts alpha 1 << 2
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case ST_ALPHA: // starts alpha
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// May 8, 2009 5:57:51 PM
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// Mon Jan _2 15:04:05 2006
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// Mon Jan _2 15:04:05 MST 2006
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// Mon Jan 02 15:04:05 -0700 2006
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// Monday, 02-Jan-06 15:04:05 MST
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// Mon, 02 Jan 2006 15:04:05 MST
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// Mon, 02 Jan 2006 15:04:05 -0700
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if unicode.IsLetter(r) {
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continue
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}
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switch {
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case r == ' ':
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state = state << 3
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case r == ',':
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state = state << 4
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case unicode.IsDigit(r):
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state = state << 5
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state = ST_ALPHAWS
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// case r == ',': TODO
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// state = ST_ALPHACOMMA
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// case unicode.IsDigit(r):
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// state = ST_ALPHADIGIT
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}
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case 32: // Starts alpha then whitespace 1 << 2 << 3
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case ST_ALPHAWS: // Starts alpha then whitespace
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switch {
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case r == ' ':
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state = state << 6
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// case r == ' ':
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// state = ST_ALPHAWSWS
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case r == ',':
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state = state << 7
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case unicode.IsDigit(r):
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state = state << 8
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state = ST_ALPHAWSCOMMA
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case unicode.IsLetter(r):
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state = state << 9
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}
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case 8192: // Starts Alpha then whitespace then digit 1 << 2 << 8
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case ST_ALPHAWSCOMMA: // Starts Alpha, whitespace, digit, comma
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// May 8, 2009 5:57:51 PM
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if t, err := time.Parse("Jan 2, 2006 3:04:05 PM", datestr); err == nil {
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return t, nil
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@ -179,7 +202,7 @@ iterRunes:
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}
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switch state {
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case 2:
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case ST_DIGIT:
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// unixy timestamps ish
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if len(datestr) >= len("13980450781991351") {
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if nanoSecs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
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@ -200,7 +223,7 @@ iterRunes:
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u.Error(err)
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}
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}
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case 64: // starts digit then dash 02- 1 << 2 << 5
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case ST_DIGITDASH: // starts digit then dash 02-
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// 2006-01-02
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if len(datestr) == len("2014-04-26") {
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if t, err := time.Parse("2006-01-02", datestr); err == nil {
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@ -209,7 +232,7 @@ iterRunes:
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u.Error(err)
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}
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}
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case 65: // starts digit then dash 02- then whitespace 1 << 2 << 5 + 3
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case ST_DIGITDASHWS: // starts digit then dash 02- then whitespace 1 << 2 << 5 + 3
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// 2014-04-26 17:24:37.3186369
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// 2012-08-03 18:31:59.257000000
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// 2016-03-14 00:00:00.000
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@ -239,7 +262,7 @@ iterRunes:
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u.Error(err)
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}
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}
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case 256: // starts digit then slash 02/
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case ST_DIGITSLASH: // starts digit then slash 02/ (but nothing else)
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// 3/1/2014
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// 10/13/2014
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// 01/02/2006
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@ -258,7 +281,7 @@ iterRunes:
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}
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}
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case 524288: // starts digit then slash 02/ more digits/slashes then whitespace
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case ST_DIGITSLASHWSCOLON: // starts digit then slash 02/ more digits/slashes then whitespace
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// 4/8/2014 22:05
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if len(datestr) == len("01/02/2006 15:04") {
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if t, err := time.Parse("01/02/2006 15:04", datestr); err == nil {
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@ -283,7 +306,7 @@ iterRunes:
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u.Error(err)
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}
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}
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case 268435456: // starts digit then slash 02/ more digits/slashes then whitespace double colons
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case ST_DIGITSLASHWSCOLONCOLON: // starts digit then slash 02/ more digits/slashes then whitespace double colons
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// 03/19/2012 10:11:59
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// 3/1/2012 10:11:59
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// 03/1/2012 10:11:59
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@ -11,10 +11,10 @@ import (
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var _ = time.April
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/*
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ANSIC = "Mon Jan _2 15:04:05 2006"
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UnixDate = "Mon Jan _2 15:04:05 MST 2006"
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RubyDate = "Mon Jan 02 15:04:05 -0700 2006"
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RFC822 = "02 Jan 06 15:04 MST"
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ANSIC = "Mon Jan _2 15:04:05 2006" x
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UnixDate = "Mon Jan _2 15:04:05 MST 2006" x
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RubyDate = "Mon Jan 02 15:04:05 -0700 2006" x
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RFC822 = "02 Jan 06 15:04 MST" x
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RFC822Z = "02 Jan 06 15:04 -0700" // RFC822 with numeric zone
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RFC850 = "Monday, 02-Jan-06 15:04:05 MST"
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RFC1123 = "Mon, 02 Jan 2006 15:04:05 MST"
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