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
|
use crate::masks::MASKS;
use crate::options::*;
use chrono::prelude::*;
use chrono::{DateTime};
fn is_leap_year(year: i32) -> bool {
year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)
}
fn get_year_len(year: i32) -> usize {
if is_leap_year(year) {
return 366;
}
365
}
pub fn to_ordinal(date: &DateTime<Utc>) -> isize {
(date.timestamp() / 60 / 60 / 24) as isize
}
pub fn get_weekday_val(wk: &Weekday) -> usize {
match wk {
Weekday::Mon => 0,
Weekday::Tue => 1,
Weekday::Wed => 2,
Weekday::Thu => 3,
Weekday::Fri => 4,
Weekday::Sat => 5,
Weekday::Sun => 6,
}
}
pub struct BaseMasks {
mmask: Vec<usize>,
mdaymask: Vec<usize>,
nmdaymask: Vec<isize>,
wdaymask: Vec<usize>,
mrange: Vec<usize>,
}
fn base_year_masks(year: i32) -> BaseMasks {
let masks = MASKS.clone();
let firstyday = Utc.ymd(year, 1, 1).and_hms_milli(0, 0, 0, 0);
let yearlen = get_year_len(year);
let wday = get_weekday_val(&firstyday.weekday()) as usize;
if yearlen == 365 {
return BaseMasks {
mmask: masks.m365,
mdaymask: masks.mday365,
nmdaymask: masks.nmday365,
mrange: masks.m365range,
wdaymask: Vec::from(&masks.wday[wday..]),
};
}
BaseMasks {
mmask: masks.m366,
mdaymask: masks.mday366,
nmdaymask: masks.nmday366,
mrange: masks.m366range,
wdaymask: Vec::from(&masks.wday[wday..]),
}
}
pub fn pymod(a: isize, b: isize) -> isize {
let r = a % b;
// If r and b differ in sign, add b to wrap the result to the correct sign.
if (r > 0 && b < 0) || (r < 0 && b > 0) {
return r + b;
}
r
}
pub fn rebuild_year(year: i32, options: &ParsedOptions) -> YearInfo {
let firstyday = Utc.ymd(year, 1, 1).and_hms_milli(0, 0, 0, 0);
let yearlen = get_year_len(year);
let nextyearlen = get_year_len(year + 1);
let yearordinal = to_ordinal(&firstyday);
let yearweekday = get_weekday_val(&firstyday.weekday());
let base_masks = base_year_masks(year);
let mut result = YearInfo {
yearlen,
nextyearlen,
yearordinal,
yearweekday,
wnomask: None,
mmask: base_masks.mmask,
mdaymask: base_masks.mdaymask,
nmdaymask: base_masks.nmdaymask,
mrange: base_masks.mrange,
wdaymask: base_masks.wdaymask,
};
if options.byweekno.is_empty() {
return result;
}
let mut wnomask = vec![0; yearlen + 7];
let wyearlen;
let mut no1wkst = pymod((7 - yearweekday + options.wkst) as isize, 7);
let firstwkst = no1wkst;
if no1wkst >= 4 {
no1wkst = 0;
// Number of days in the year, plus the days we got
// from last year.
wyearlen = result.yearlen as isize + pymod(yearweekday as isize - options.wkst as isize, 7);
} else {
// Number of days in the year, minus the days we
// left in last year.
wyearlen = yearlen as isize - no1wkst;
}
let div = (wyearlen as f32 / 7.).floor() as isize;
let year_mod = pymod(wyearlen, 7);
//const numweeks = Math.floor(div + mod / 4)
let numweeks = div + (year_mod / 4);
for j in 0..options.byweekno.len() {
let mut n = options.byweekno[j];
if n < 0 {
n += (numweeks + 1) as isize;
}
if !(n > 0 && n <= numweeks) {
continue;
}
let mut i;
if n > 1 {
i = no1wkst + (n - 1) * 7;
if no1wkst != firstwkst {
i -= 7 - firstwkst;
}
} else {
i = no1wkst;
}
for _ in 0..7 {
wnomask[i as usize] = 1;
i += 1;
if result.wdaymask[i as usize] as usize == options.wkst {
break;
}
}
}
if options.byweekno.iter().any(|&wkno| wkno == 1) {
// Check week number 1 of next year as well
// orig-TODO : Check -numweeks for next year.
let mut i = no1wkst + numweeks * 7;
if no1wkst != firstwkst {
i -= 7 - firstwkst;
}
if i < yearlen as isize {
// If week starts in next year, we
// don't care about it.
for _ in 0..7 {
wnomask[i as usize] = 1;
i += 1;
if result.wdaymask[i as usize] as usize == options.wkst {
break;
}
}
}
}
if no1wkst > 0 {
// Check last week number of last year as
// well. If no1wkst is 0, either the year
// started on week start, or week number 1
// got days from last year, so there are no
// days from last year's last week number in
// this year.
let lnumweeks;
if !options.byweekno.iter().any(|&weekno| weekno == -1) {
let lyearweekday = get_weekday_val(&Utc.ymd(year - 1, 1, 1).weekday());
let lno1wkst = pymod((7 - lyearweekday + options.wkst) as isize, 7);
let lyearlen = get_year_len(year - 1);
let weekst;
if lno1wkst >= 4 {
//lno1wkst = 0;
weekst = lyearlen as isize + pymod((lyearweekday - options.wkst) as isize, 7);
} else {
weekst = yearlen as isize - no1wkst;
}
lnumweeks = 52 + (pymod(weekst, 7) / 4) as isize;
} else {
lnumweeks = -1 as isize;
}
if options.byweekno.iter().any(|&weekno| weekno == lnumweeks) {
for i in 0..no1wkst {
wnomask[i as usize] = 1;
}
}
}
result.wnomask = Some(wnomask);
result
}
|
