ionex 0.1.0

IONEX (Ionosphere Maps) parser
Documentation 
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

//! Epoch parsing helper
use crate::prelude::{Epoch, ParsingError};

// use std::str::FromStr;

/// Formats given epoch to string, matching standard specifications
pub(crate) fn format_header(epoch: Epoch) -> String {
    let (y, m, d, hh, mm, ss, _nanos) = epoch.to_gregorian(epoch.time_scale);
    format!(
        "{:04}   {:>2}    {:>2}    {:>2}    {:>2}    {:>2}",
        y, m, d, hh, mm, ss
    )
}

pub(crate) fn format_body(epoch: Epoch) -> String {
    let (y, m, d, hh, mm, ss, _nanos) = epoch.to_gregorian(epoch.time_scale);
    format!(
        "  {:04}    {:>2}    {:>2}    {:>2}    {:>2}    {:>2}",
        y, m, d, hh, mm, ss
    )
}

pub(crate) fn parse_utc(s: &str) -> Result<Epoch, ParsingError> {
    let (mut y, mut m, mut d, mut hh, mut mm, mut ss) = (0_i32, 0_u8, 0_u8, 0_u8, 0_u8, 0_u8);
    for (index, field) in s.split_ascii_whitespace().enumerate() {
        match index {
            0 => {
                y = field
                    .trim()
                    .parse::<i32>()
                    .map_err(|_| ParsingError::DatetimeParsing)?;
            },
            1 => {
                m = field
                    .trim()
                    .parse::<u8>()
                    .map_err(|_| ParsingError::DatetimeParsing)?;
            },
            2 => {
                d = field
                    .trim()
                    .parse::<u8>()
                    .map_err(|_| ParsingError::DatetimeParsing)?;
            },
            3 => {
                hh = field
                    .trim()
                    .parse::<u8>()
                    .map_err(|_| ParsingError::DatetimeParsing)?;
            },
            4 => {
                mm = field
                    .trim()
                    .parse::<u8>()
                    .map_err(|_| ParsingError::DatetimeParsing)?;
            },
            5 => {
                ss = field
                    .trim()
                    .parse::<u8>()
                    .map_err(|_| ParsingError::DatetimeParsing)?;
            },
            _ => {},
        }
    }

    Ok(Epoch::from_gregorian_utc(y, m, d, hh, mm, ss, 0))
}

// /*
//  * Until Hifitime provides a decomposition method in timescale other than UTC
//  * we have this tweak to decompose %Y %M %D %HH %MM %SS and without nanoseconds
//  */
// pub(crate) fn epoch_decompose(e: Epoch) -> (i32, u8, u8, u8, u8, u8, u32) {
//     let isofmt = e.to_gregorian_str(e.time_scale);
//     let mut datetime = isofmt.split('T');
//     let date = datetime.next().unwrap();
//     let mut date = date.split('-');
//
//     let time = datetime.next().unwrap();
//     let mut time_scale = time.split(' ');
//     let time = time_scale.next().unwrap();
//     let mut time = time.split(':');
//
//     let years = date.next().unwrap().parse::<i32>().unwrap();
//     let months = date.next().unwrap().parse::<u8>().unwrap();
//     let days = date.next().unwrap().parse::<u8>().unwrap();
//
//     let hours = time.next().unwrap().parse::<u8>().unwrap();
//     let mins = time.next().unwrap().parse::<u8>().unwrap();
//     let seconds = f64::from_str(time.next().unwrap()).unwrap();
//
//     (
//         years,
//         months,
//         days,
//         hours,
//         mins,
//         seconds.floor() as u8,
//         (seconds.fract() * 1E9).round() as u32,
//     )
// }

#[cfg(test)]
mod test {
    use super::*;
    use hifitime::Epoch;
    use std::str::FromStr;

    #[test]
    fn datetime_parsing() {
        for (desc, expected) in [(
            "  2022     1     2     0     0     0                        ",
            Epoch::from_str("2022-01-02T00:00:00 UTC").unwrap(),
        )] {
            let epoch = parse_utc(desc).unwrap_or_else(|e| {
                panic!("Failed to parse datetime from \"{}\": {}", desc, e);
            });

            assert_eq!(epoch, expected);
        }
    }

    // #[test]
    // fn epoch_decomposition() {
    //     for (epoch, y, m, d, hh, mm, ss, ns) in [
    //         ("2021-01-01T00:00:00 GPST", 2021, 1, 1, 0, 0, 0, 0),
    //         ("2021-01-01T00:00:01 GPST", 2021, 1, 1, 0, 0, 1, 0),
    //         ("2021-01-01T23:59:58 GPST", 2021, 1, 1, 23, 59, 58, 0),
    //         ("2021-01-01T23:59:59 GPST", 2021, 1, 1, 23, 59, 59, 0),
    //         ("2021-01-01T00:00:00 GST", 2021, 1, 1, 0, 0, 0, 0),
    //         ("2021-01-01T00:00:01 GST", 2021, 1, 1, 0, 0, 1, 0),
    //         ("2021-01-01T23:59:58 GST", 2021, 1, 1, 23, 59, 58, 0),
    //         ("2021-01-01T23:59:59 GST", 2021, 1, 1, 23, 59, 59, 0),
    //     ] {
    //         let e = Epoch::from_str(epoch).unwrap();
    //         assert_eq!(
    //             epoch_decompose(e),
    //             (y, m, d, hh, mm, ss, ns),
    //             "failed for {}",
    //             epoch
    //         );
    //     }
    // }
}