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uucore: format: Use ExtendedBigDecimal in argument code

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Provides arbitrary precision for float parsing in printf.

Also add a printf test for that.
This commit is contained in:
Nicolas Boichat 2025-03-19 13:08:43 +01:00
parent 71a285468b
commit b5a658528b
4 changed files with 26 additions and 9 deletions
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10
tests/by-util/test_printf.rs
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@ -992,6 +992,16 @@ fn float_flag_position_space_padding() {
.stdout_only(" +1.0");
}
#[test]
fn float_large_precision() {
// Note: This does not match GNU coreutils output (0.100000000000000000001355252716 on x86),
// as we parse and format using ExtendedBigDecimal, which provides arbitrary precision.
new_ucmd!()
.args(&["%.30f", "0.1"])
.succeeds()
.stdout_only("0.100000000000000000000000000000");
}
#[test]
fn float_non_finite_space_padding() {
new_ucmd!()