lox_frames/
providers.rs

1// SPDX-FileCopyrightText: 2025 Helge Eichhorn <git@helgeeichhorn.de>
2//
3// SPDX-License-Identifier: MPL-2.0
4
5use std::convert::Infallible;
6
7use lox_time::{
8    Time,
9    deltas::TimeDelta,
10    offsets::OffsetProvider,
11    time_scales::{Tai, TimeScale},
12    utc::{
13        Utc,
14        leap_seconds::{DefaultLeapSecondsProvider, LeapSecondsProvider},
15    },
16};
17
18use crate::{
19    iers::{Corrections, ReferenceSystem, polar_motion::PoleCoords},
20    rotations::RotationProvider,
21};
22
23/// Default rotation provider with no EOP data (zero corrections, zero polar motion).
24#[derive(Copy, Clone, Debug)]
25pub struct DefaultRotationProvider;
26
27impl OffsetProvider for DefaultRotationProvider {
28    type Error = Infallible;
29
30    fn tai_to_ut1(&self, delta: TimeDelta) -> Result<TimeDelta, Self::Error> {
31        let Some(_) = delta.seconds() else {
32            return Ok(TimeDelta::ZERO);
33        };
34        let tai = Time::from_delta(Tai, delta);
35        Ok(DefaultLeapSecondsProvider.delta_tai_utc(tai))
36    }
37
38    fn ut1_to_tai(&self, delta: TimeDelta) -> Result<TimeDelta, Self::Error> {
39        let Ok(utc) = Utc::from_delta(delta) else {
40            return Ok(TimeDelta::ZERO);
41        };
42        Ok(DefaultLeapSecondsProvider.delta_utc_tai(utc))
43    }
44}
45
46impl<T> RotationProvider<T> for DefaultRotationProvider
47where
48    T: TimeScale,
49{
50    type EopError = Infallible;
51
52    fn corrections(
53        &self,
54        _time: Time<T>,
55        _sys: ReferenceSystem,
56    ) -> Result<Corrections, Self::EopError> {
57        Ok(Corrections::default())
58    }
59
60    fn pole_coords(&self, _time: Time<T>) -> Result<PoleCoords, Self::EopError> {
61        Ok(PoleCoords::default())
62    }
63}
lox_frames/providers.rs

lox_frames/
providers.rs
