monorepo/emseries/src/interval.rs

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/*
Copyright 2020-2023, Savanni D'Gerinel <savanni@luminescent-dreams.com>
This file is part of the Luminescent Dreams Tools.
Luminescent Dreams Tools is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
Luminescent Dreams Tools is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with Lumeto. If not, see <https://www.gnu.org/licenses/>.
*/
// NOTE: this module is a candidate for extraction into its own crate, or should be replaced with
// an existing crate.
/// Specify an interval across the data type T
pub struct Interval<T> {
start: T,
start_incl: bool,
end: T,
end_incl: bool,
}
impl<T> Interval<T>
where
T: Clone + Ord,
{
/// Create a new interval from the start value to the end value, specifying inclusivity on
/// either end of the interval.
pub fn new(start: T, start_incl: bool, end: T, end_incl: bool) -> Interval<T> {
Interval {
start,
start_incl,
end,
end_incl,
}
}
/// Create an interval that matches *exactly* the specified value.
pub fn exact(val: T) -> Interval<T> {
Interval {
start: val.clone(),
start_incl: true,
end: val,
end_incl: true,
}
}
/// Test whether a value is included in the specified interval.
pub fn contains(&self, val: T) -> bool {
match (self.start_incl, self.end_incl) {
(true, true) => self.start <= val && val <= self.end,
(true, false) => self.start <= val && val < self.end,
(false, true) => self.start < val && val <= self.end,
(false, false) => self.start < val && val < self.end,
}
}
}