diff --git a/Doc/c-api/complex.rst b/Doc/c-api/complex.rst index 5a0474869071d9..8aa1599e7f4b7a 100644 --- a/Doc/c-api/complex.rst +++ b/Doc/c-api/complex.rst @@ -75,6 +75,8 @@ pointers. This is consistent throughout the API. If *num* is null and *exp* is not a positive real number, this method returns zero and sets :c:data:`errno` to :c:macro:`!EDOM`. + Set :c:data:`errno` to :c:macro:`!ERANGE` on overflows. + Complex Numbers as Python Objects ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ diff --git a/Lib/test/test_capi/test_complex.py b/Lib/test/test_capi/test_complex.py index 328ea12f97462c..d731e9308d7ce9 100644 --- a/Lib/test/test_capi/test_complex.py +++ b/Lib/test/test_capi/test_complex.py @@ -226,7 +226,10 @@ def test_py_c_pow(self): self.assertEqual(_py_c_pow(0j, -1)[1], errno.EDOM) self.assertEqual(_py_c_pow(0j, 1j)[1], errno.EDOM) - self.assertEqual(_py_c_pow(*[DBL_MAX+1j]*2)[0], complex(*[INF]*2)) + self.assertEqual(_py_c_pow(*[DBL_MAX+1j]*2), + (complex(*[INF]*2), errno.ERANGE)) + self.assertEqual(_py_c_pow(DBL_MAX+1j, 2), + (complex(*[INF]*2), errno.ERANGE)) def test_py_c_abs(self): diff --git a/Misc/NEWS.d/next/C API/2024-06-08-08-33-40.gh-issue-119771.Oip2dL.rst b/Misc/NEWS.d/next/C API/2024-06-08-08-33-40.gh-issue-119771.Oip2dL.rst new file mode 100644 index 00000000000000..61619082487c3b --- /dev/null +++ b/Misc/NEWS.d/next/C API/2024-06-08-08-33-40.gh-issue-119771.Oip2dL.rst @@ -0,0 +1,2 @@ +Set :data:`errno` in :c:func:`_Py_c_pow` on overflows. Patch by Sergey B +Kirpichev. diff --git a/Objects/complexobject.c b/Objects/complexobject.c index a8be266970afd0..9ff1c4a45b26d8 100644 --- a/Objects/complexobject.c +++ b/Objects/complexobject.c @@ -152,6 +152,8 @@ _Py_c_pow(Py_complex a, Py_complex b) } r.real = len*cos(phase); r.imag = len*sin(phase); + + _Py_ADJUST_ERANGE2(r.real, r.imag); } return r; } @@ -546,12 +548,12 @@ complex_pow(PyObject *v, PyObject *w, PyObject *z) // a faster and more accurate algorithm. if (b.imag == 0.0 && b.real == floor(b.real) && fabs(b.real) <= 100.0) { p = c_powi(a, (long)b.real); + _Py_ADJUST_ERANGE2(p.real, p.imag); } else { p = _Py_c_pow(a, b); } - _Py_ADJUST_ERANGE2(p.real, p.imag); if (errno == EDOM) { PyErr_SetString(PyExc_ZeroDivisionError, "zero to a negative or complex power");