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uucore:format:fix floating-point representation #7034

Merged
merged 1 commit into from
Jan 1, 2025
Merged

uucore:format:fix floating-point representation #7034

merged 1 commit into from
Jan 1, 2025

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alexs-sh
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@alexs-sh alexs-sh commented Dec 30, 2024 •
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This PR resolves issues with exponent calculation and usage, ensuring more accurate formatting:

  • Exponent for negative values can differ from 0
  • Switching to decimal mode now follows the P > X ≥ −4 rule

Fixes #7031

Before

cargo run -- printf "%g" -0.1171875
-0.11719          
 
cargo run -- printf "%g"  -0.00001
-0.00001

After

cargo run -- printf "%g" -0.1171875
-0.117188        
          
cargo run -- printf "%g"  -0.00001
-1e-05

Expected

printf "%g" -0.1171875
-0.117188  

printf "%g" -0.00001
-1e-05

@alexs-sh alexs-sh force-pushed the uucore-fix-fp-general-format-output branch from f4b248e to 79847b8 Compare December 30, 2024 22:40
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GNU testsuite comparison:

Skipping an intermittent issue tests/timeout/timeout (passes in this run but fails in the 'main' branch)

@alexs-sh alexs-sh force-pushed the uucore-fix-fp-general-format-output branch 2 times, most recently from 55da066 to dfd1621 Compare December 31, 2024 08:43
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GNU testsuite comparison:

Congrats! The gnu test tests/seq/seq is no longer failing!

@alexs-sh alexs-sh force-pushed the uucore-fix-fp-general-format-output branch from dfd1621 to 356da0e Compare December 31, 2024 10:33
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GNU testsuite comparison:

Skipping an intermittent issue tests/timeout/timeout (passes in this run but fails in the 'main' branch)

@alexs-sh alexs-sh changed the title uucore:format:fix floating-point rounding uucore:format:fix floating-point representation Dec 31, 2024
@alexs-sh
uucore:format:fix floating-point rounding
4c330d4 
This change resolves issues with exponent calculation and usage,
ensuring more accurate formatting:

- Exponent for negative values can differ from 0
- Switching to decimal mode now follows the P > X ≥ −4 rule
@alexs-sh alexs-sh force-pushed the uucore-fix-fp-general-format-output branch from 356da0e to 4c330d4 Compare December 31, 2024 12:19
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GNU testsuite comparison:

Skipping an intermittent issue tests/timeout/timeout (passes in this run but fails in the 'main' branch)

@sylvestre
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excellent, thanks :)

@sylvestre sylvestre merged commit 6d028cd into uutils:main Jan 1, 2025
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@alexs-sh
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alexs-sh commented Jan 1, 2025

I'm glad to help :)

@alexs-sh alexs-sh deleted the uucore-fix-fp-general-format-output branch January 2, 2025 15:03
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Successfully merging this pull request may close these issues.

printf:output doesn't match with GNU printf
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@alexs-sh @sylvestre