1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module time
// parse returns time from a date string in "YYYY-MM-DD HH:MM:SS" format.
pub fn parse(s string) ?Time {
pos := s.index(' ') or { return error('Invalid time format: $s') }
symd := s[..pos]
ymd := symd.split('-')
if ymd.len != 3 {
return error('Invalid time format: $s')
}
shms := s[pos..]
hms := shms.split(':')
hour_ := hms[0][1..]
minute_ := hms[1]
second_ := hms[2]
res := new_time(Time{
year: ymd[0].int()
month: ymd[1].int()
day: ymd[2].int()
hour: hour_.int()
minute: minute_.int()
second: second_.int()
})
return res
}
// parse_rfc2822 returns time from a date string in RFC 2822 datetime format.
pub fn parse_rfc2822(s string) ?Time {
fields := s.split(' ')
if fields.len < 5 {
return error('Invalid time format: $s')
}
pos := months_string.index(fields[2]) or { return error('Invalid time format: $s') }
mm := pos / 3 + 1
unsafe {
tmstr := malloc_noscan(s.len * 2)
count := C.snprintf(&char(tmstr), (s.len * 2), c'%s-%02d-%s %s', fields[3].str,
mm, fields[1].str, fields[4].str)
return parse(tos(tmstr, count))
}
}
// ----- iso8601 -----
const (
err_invalid_8601 = 'Invalid 8601 Format'
)
fn parse_iso8601_date(s string) ?(int, int, int) {
year, month, day, dummy := 0, 0, 0, byte(0)
count := unsafe { C.sscanf(&char(s.str), c'%4d-%2d-%2d%c', &year, &month, &day, &dummy) }
if count != 3 {
return error(time.err_invalid_8601)
}
return year, month, day
}
fn parse_iso8601_time(s string) ?(int, int, int, int, i64, bool) {
hour_ := 0
minute_ := 0
second_ := 0
microsecond_ := 0
plus_min_z := `a`
offset_hour := 0
offset_minute := 0
mut count := unsafe {
C.sscanf(&char(s.str), c'%2d:%2d:%2d.%6d%c%2d:%2d', &hour_, &minute_, &second_,
µsecond_, &char(&plus_min_z), &offset_hour, &offset_minute)
}
// Missread microsecond ([Sec Hour Minute].len == 3 < 4)
if count < 4 {
count = unsafe {
C.sscanf(&char(s.str), c'%2d:%2d:%2d%c%2d:%2d', &hour_, &minute_, &second_,
&char(&plus_min_z), &offset_hour, &offset_minute)
}
count++ // Increment count because skipped microsecond
}
if count < 4 {
return error(time.err_invalid_8601)
}
is_local_time := plus_min_z == `a` && count == 4
is_utc := plus_min_z == `Z` && count == 5
if !(count == 7 || is_local_time || is_utc) {
return error(time.err_invalid_8601)
}
if plus_min_z != `+` && plus_min_z != `-` && !is_utc && !is_local_time {
return error('Invalid 8601 format, expected `Z` or `+` or `-` as time separator')
}
mut unix_offset := 0
if offset_hour > 0 {
unix_offset += 3600 * offset_hour
}
if offset_minute > 0 {
unix_offset += 60 * offset_minute
}
if plus_min_z == `+` {
unix_offset *= -1
}
return hour_, minute_, second_, microsecond_, unix_offset, is_local_time
}
// parse_iso8601 parses rfc8601 time format yyyy-MM-ddTHH:mm:ss.dddddd+dd:dd as local time
// the fraction part is difference in milli seconds and the last part is offset
// from UTC time and can be both +/- HH:mm
// remarks: not all iso8601 is supported
// also checks and support for leapseconds should be added in future PR
pub fn parse_iso8601(s string) ?Time {
t_i := s.index('T') or { -1 }
parts := if t_i != -1 { [s[..t_i], s[t_i + 1..]] } else { s.split(' ') }
if !(parts.len == 1 || parts.len == 2) {
return error(time.err_invalid_8601)
}
year, month, day := parse_iso8601_date(parts[0]) ?
mut hour_, mut minute_, mut second_, mut microsecond_, mut unix_offset, mut is_local_time := 0, 0, 0, 0, i64(0), true
if parts.len == 2 {
hour_, minute_, second_, microsecond_, unix_offset, is_local_time = parse_iso8601_time(parts[1]) ?
}
mut t := new_time(Time{
year: year
month: month
day: day
hour: hour_
minute: minute_
second: second_
microsecond: microsecond_
})
if is_local_time {
return t // Time already local time
}
mut unix_time := t.unix
if unix_offset < 0 {
unix_time -= u64(-unix_offset)
} else if unix_offset > 0 {
unix_time += u64(unix_offset)
}
t = unix2(i64(unix_time), t.microsecond)
return t
}
|
