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* py/formatfloat: Use pow(10, e) instead of pos/neg_pow lookup tables.Dan Ellis2022-08-12
| | | | | | | | | | | | | Rework the conversion of floats to decimal strings so it aligns precisely with the conversion of strings to floats in parsenum.c. This is to avoid rendering 1eX as 9.99999eX-1 etc. This is achieved by removing the power- of-10 tables and using pow() to compute the exponent directly, and that's done efficiently by first estimating the power-of-10 exponent from the power-of-2 exponent in the floating-point representation. Code size is reduced by roughly 100 to 200 bytes by this commit. Signed-off-by: Dan Ellis <dan.ellis@gmail.com>
* tests: Format all Python code with black, except tests in basics subdir.David Lechner2020-03-30
| | | | | | | | | | This adds the Python files in the tests/ directory to be formatted with ./tools/codeformat.py. The basics/ subdirectory is excluded for now so we aren't changing too much at once. In a few places `# fmt: off`/`# fmt: on` was used where the code had special formatting for readability or where the test was actually testing the specific formatting.
* py/formatfloat: Fix number of digits and exponent sign when rounding.Damien George2017-06-13
| | | | | | | This patch fixes 2 things when printing a floating-point number that requires rounding up of the mantissa: - retain the correct precision; eg 0.99 becomes 1.0, not 1.00 - if the exponent goes from -1 to 0 then render it as +0, not -0
* tests/float: Improve formatfloat.c test coverage using Python.Rami Ali2017-01-05
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* py/formatfloat: Fix buffer overflow when formatting tiny numbers.Damien George2016-03-15
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* tests: Add some tests for printing floats to improve coverage.Damien George2015-05-28
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* py: Remove unnecessary extra handling of padding of nan/inf.Damien George2015-05-28
| | | | | | | C's printf will pad nan/inf differently to CPython. Our implementation originally conformed to C, now it conforms to CPython's way. Tests for this are also added in this patch.
* tests: Rename test scripts, changing - to _ for consistency.Damien George2014-07-05
From now on, all new tests must use underscore. Addresses issue #727.