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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
/*
* Hifitime
* Copyright (C) 2017-onward Christopher Rabotin <christopher.rabotin@gmail.com> et al. (cf. https://github.com/nyx-space/hifitime/graphs/contributors)
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/.
*
* Documentation: https://nyxspace.com/
*/
use crate::{HifitimeError, ParsingError};
#[cfg_attr(kani, derive(kani::Arbitrary))]
#[derive(Debug, Copy, Clone, PartialEq, Eq, Default)]
pub(crate) enum Token {
#[default]
Year,
YearShort,
Month,
Day,
Hour,
Minute,
Second,
Subsecond,
OffsetHours,
OffsetMinutes,
Timescale,
DayOfYearInteger,
DayOfYear,
Weekday,
WeekdayShort,
WeekdayDecimal,
MonthName,
MonthNameShort,
}
impl Token {
// Check that the _integer_ value is valid at first sight.
pub fn value_ok(&self, val: i32) -> Result<(), HifitimeError> {
match &self {
Self::Year => Ok(()), // No validation
Self::YearShort => Ok(()), // No validation
Self::Month => {
if !(0..=13).contains(&val) {
Err(HifitimeError::Parse {
source: ParsingError::ValueError,
details: "invalid month",
})
} else {
Ok(())
}
}
Self::Day => {
if !(0..=31).contains(&val) {
Err(HifitimeError::Parse {
source: ParsingError::ValueError,
details: "invalid day",
})
} else {
Ok(())
}
}
Self::Hour | Self::OffsetHours => {
if !(0..=23).contains(&val) {
Err(HifitimeError::Parse {
source: ParsingError::ValueError,
details: "invalid hour",
})
} else {
Ok(())
}
}
Self::Minute | Self::OffsetMinutes => {
if !(0..=59).contains(&val) {
Err(HifitimeError::Parse {
source: ParsingError::ValueError,
details: "invalid minutes",
})
} else {
Ok(())
}
}
Self::Second => {
if !(0..=60).contains(&val) {
Err(HifitimeError::Parse {
source: ParsingError::ValueError,
details: "invalid seconds",
})
} else {
Ok(())
}
}
Self::Subsecond => {
if val < 0 {
Err(HifitimeError::Parse {
source: ParsingError::ValueError,
details: "invalid subseconds",
})
} else {
Ok(())
}
}
Self::Timescale => Ok(()),
Self::DayOfYearInteger => {
if !(0..=366).contains(&val) {
Err(HifitimeError::Parse {
source: ParsingError::ValueError,
details: "invalid day of year",
})
} else {
Ok(())
}
}
Self::WeekdayDecimal => {
if !(0..=6).contains(&val) {
Err(HifitimeError::Parse {
source: ParsingError::ValueError,
details: "invalid weekday decimal (must be 0-6)",
})
} else {
Ok(())
}
}
Self::Weekday
| Self::WeekdayShort
| Self::MonthName
| Self::MonthNameShort
| Self::DayOfYear => {
// These cannot be parsed as integers
Err(HifitimeError::Parse {
source: ParsingError::ValueError,
details: "invalid name or day of year",
})
}
}
}
/// Returns the position in the array for a Gregorian date for this token
pub(crate) fn gregorian_position(&self) -> Option<usize> {
match &self {
Token::Year | Token::YearShort => Some(0),
Token::Month => Some(1),
Token::Day => Some(2),
Token::Hour => Some(3),
Token::Minute => Some(4),
Token::Second => Some(5),
Token::Subsecond => Some(6),
Token::OffsetHours => Some(7),
Token::OffsetMinutes => Some(8),
_ => None,
}
}
/// Updates the token to what it should be seeking next given the delimiting character
/// and returns the position in the array where the parsed integer should live
pub fn advance_with(&mut self, ending_char: char) -> Result<(), HifitimeError> {
match &self {
Token::Year | Token::YearShort => {
if ending_char == '-' {
*self = Token::Month;
Ok(())
} else {
Err(HifitimeError::Parse {
source: ParsingError::UnknownFormat,
details: "invalid year",
})
}
}
Token::Month => {
if ending_char == '-' {
*self = Token::Day;
Ok(())
} else {
Err(HifitimeError::Parse {
source: ParsingError::UnknownFormat,
details: "invalid month",
})
}
}
Token::Day => {
if ending_char == 'T' || ending_char == ' ' {
*self = Token::Hour;
Ok(())
} else {
Err(HifitimeError::Parse {
source: ParsingError::UnknownFormat,
details: "invalid day",
})
}
}
Token::Hour => {
if ending_char == ':' {
*self = Token::Minute;
Ok(())
} else {
Err(HifitimeError::Parse {
source: ParsingError::UnknownFormat,
details: "invalid hour",
})
}
}
Token::Minute => {
if ending_char == ':' {
*self = Token::Second;
Ok(())
} else {
Err(HifitimeError::Parse {
source: ParsingError::UnknownFormat,
details: "invalid minutes",
})
}
}
Token::Second => {
if ending_char == '.' {
*self = Token::Subsecond;
} else if ending_char == ' ' || ending_char == 'Z' {
// There are no subseconds here, only room for a time scale
*self = Token::Timescale;
} else if ending_char == '-' || ending_char == '+' {
// There are no subseconds here, but we're seeing the start of an offset
*self = Token::OffsetHours;
} else {
return Err(HifitimeError::Parse {
source: ParsingError::UnknownFormat,
details: "invalid seconds",
});
}
Ok(())
}
Token::Subsecond => {
if ending_char == ' ' || ending_char == 'Z' {
// There are no subseconds here, only room for a time scale
*self = Token::Timescale;
} else if ending_char == '-' || ending_char == '+' {
// There are no subseconds here, but we're seeing the start of an offset
*self = Token::OffsetHours;
} else {
return Err(HifitimeError::Parse {
source: ParsingError::UnknownFormat,
details: "invalid subseconds",
});
}
Ok(())
}
Token::OffsetHours => {
if ending_char == ':' {
*self = Token::OffsetMinutes;
Ok(())
} else {
Err(HifitimeError::Parse {
source: ParsingError::UnknownFormat,
details: "invalid hours offset",
})
}
}
Token::OffsetMinutes => {
if ending_char == ' ' || ending_char == 'Z' {
// Only room for a time scale
*self = Token::Timescale;
Ok(())
} else {
Err(HifitimeError::Parse {
source: ParsingError::UnknownFormat,
details: "invalid minutes offset",
})
}
}
_ => Ok(()),
}
}
pub(crate) const fn is_numeric(self) -> bool {
!matches!(
self,
Token::Timescale
| Token::Weekday
| Token::WeekdayShort
| Token::MonthName
| Token::MonthNameShort
)
}
pub(crate) const fn fixed_length(self) -> Option<usize> {
match self {
Token::Year => Some(4),
Token::YearShort
| Token::Month
| Token::Day
| Token::Hour
| Token::Minute
| Token::Second
| Token::OffsetHours
| Token::OffsetMinutes => Some(2),
Token::DayOfYearInteger => Some(3),
Token::WeekdayDecimal => Some(1),
_ => None,
}
}
}