46 lines
1.3 KiB
Rust
46 lines
1.3 KiB
Rust
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//! Helper types and functions used within the metrics ecosystem.
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/// A quantile that has both the raw value and a human-friendly display label.
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#[derive(Clone)]
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pub struct Quantile(f64, String);
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impl Quantile {
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/// Creates a new `Quantile` from a floating-point value.
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///
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/// All values clamped between 0.0 and 1.0.
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pub fn new(quantile: f64) -> Quantile {
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let clamped = quantile.max(0.0);
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let clamped = clamped.min(1.0);
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let display = clamped * 100.0;
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let raw_label = format!("{}", clamped);
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let label = match raw_label.as_str() {
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"0" => "min".to_string(),
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"1" => "max".to_string(),
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_ => {
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let raw = format!("p{}", display);
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raw.replace(".", "")
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},
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};
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Quantile(clamped, label)
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}
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/// Gets the human-friendly display label for this quantile.
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pub fn label(&self) -> &str {
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self.1.as_str()
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}
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/// Gets the raw value for this quantile.
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pub fn value(&self) -> f64 {
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self.0
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}
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}
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/// Parses a list of floating-point values into a list of `Quantile`s.
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pub fn parse_quantiles(quantiles: &[f64]) -> Vec<Quantile> {
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quantiles.iter()
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.map(|f| Quantile::new(*f))
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.collect()
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}
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