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main
Modules/_math.h
25 строк
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Sergey B Kirpichev
gh-122681: remove m_atan2()/c_atan2() helpers (#122715)
17 авг 2024, 11:18
Не верифицирован
17 авг 2024, 11:18
19be0ee
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/* log1p(x) = log(1+x). The log1p function is designed to avoid the significant loss of precision that arises from direct evaluation when x is small. Use the substitute from _math.h on all platforms: it includes workarounds for buggy handling of zeros. */ static double _Py_log1p(double x) { /* Some platforms (e.g. MacOS X 10.8, see gh-59682) supply a log1p function but don't respect the sign of zero: log1p(-0.0) gives 0.0 instead of the correct result of -0.0. To save fiddling with configure tests and platform checks, we handle the special case of zero input directly on all platforms. */ if (x == 0.0) { return x; } else { return log1p(x); } } #define m_log1p _Py_log1p