numfmt: don't round floats if --from is "none"

src/uu/numfmt/src/format.rs

@@ -145,7 +145,16 @@ fn transform_from(s: &str, opts: &TransformOptions) -> Result<f64> {
  let (i, suffix) = parse_suffix(s)?;
  let i = i * (opts.from_unit as f64);
 
- remove_suffix(i, suffix, &opts.from).map(|n| if n < 0.0 { -n.abs().ceil() } else { n.ceil() })
+ remove_suffix(i, suffix, &opts.from).map(|n| {
+ // GNU numfmt doesn't round values if no --from argument is provided by the user
+ if opts.from == Unit::None {
+ n
+ } else if n < 0.0 {
+ -n.abs().ceil()
+ } else {
+ n.ceil()
+ }
+ })
 }
 
 /// Divide numerator by denominator, with rounding.

src/uu/numfmt/src/units.rs

@@ -17,6 +17,7 @@ pub const IEC_BASES: [f64; 10] = [
 
 pub type WithI = bool;
 
+#[derive(PartialEq)]
 pub enum Unit {
  Auto,
  Si,

tests/by-util/test_numfmt.rs

@@ -2,6 +2,14 @@
 
 use crate::common::util::*;
 
+#[test]
+fn test_should_not_round_floats() {
+ new_ucmd!()
+ .args(&["0.99", "1.01", "1.1", "1.22", ".1", "-0.1"])
+ .succeeds()
+ .stdout_is("0.99\n1.01\n1.1\n1.22\n0.1\n-0.1\n");
+}
+
 #[test]
 fn test_from_si() {
  new_ucmd!()