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Allow parsing compression ratios without a colon

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This commit is contained in:
Robbert van der Helm 2022-08-20 15:54:09 +02:00
parent 35c6b97ade
commit 5010ce5e1a
1 changed files with 12 additions and 5 deletions
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11
src/formatters.rs
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@ -49,15 +49,22 @@ pub fn v2s_compression_ratio(digits: usize) -> Arc<dyn Fn(f32) -> String + Send
}
/// Parse a `x:y` compression ratio back to a floating point number. Used in conjunction with
/// [`v2s_compression_ratio()`].
/// [`v2s_compression_ratio()`]. Plain numbers are parsed directly for UX's sake.
pub fn s2v_compression_ratio() -> Arc<dyn Fn(&str) -> Option<f32> + Send + Sync> {
Arc::new(|string| {
let (numerator, denominator) = string.trim().split_once(':')?;
let string = string.trim();
string
.trim()
.split_once(':')
.and_then(|(numerator, denominator)| {
let numerator: f32 = numerator.trim().parse().ok()?;
let denominator: f32 = denominator.trim().parse().ok()?;
Some(numerator / denominator)
})
// Just parse the value directly if it doesn't contain a colon
.or_else(|| string.parse().ok())
})
}
/// Turn an `f32` value from voltage gain to decibels using the semantics described in