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987311d42e
"Generally, mixed-mode arithmetic combining real and complex variables should be performed directly, not by first coercing the real to complex, lest the sign of zero be rendered uninformative; the same goes for combinations of pure imaginary quantities with complex variables." (c) Kahan, W: Branch cuts for complex elementary functions. This patch implements mixed-mode arithmetic rules, combining real and complex variables as specified by C standards since C99 (in particular, there is no special version for the true division with real lhs operand). Most C compilers implementing C99+ Annex G have only these special rules (without support for imaginary type, which is going to be deprecated in C2y).
39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
#ifndef Py_CPYTHON_COMPLEXOBJECT_H
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# error "this header file must not be included directly"
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#endif
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typedef struct {
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double real;
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double imag;
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} Py_complex;
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// Operations on complex numbers.
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PyAPI_FUNC(Py_complex) _Py_c_sum(Py_complex, Py_complex);
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PyAPI_FUNC(Py_complex) _Py_cr_sum(Py_complex, double);
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PyAPI_FUNC(Py_complex) _Py_c_diff(Py_complex, Py_complex);
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PyAPI_FUNC(Py_complex) _Py_cr_diff(Py_complex, double);
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PyAPI_FUNC(Py_complex) _Py_rc_diff(double, Py_complex);
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PyAPI_FUNC(Py_complex) _Py_c_neg(Py_complex);
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PyAPI_FUNC(Py_complex) _Py_c_prod(Py_complex, Py_complex);
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PyAPI_FUNC(Py_complex) _Py_cr_prod(Py_complex, double);
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PyAPI_FUNC(Py_complex) _Py_c_quot(Py_complex, Py_complex);
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PyAPI_FUNC(Py_complex) _Py_cr_quot(Py_complex, double);
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PyAPI_FUNC(Py_complex) _Py_rc_quot(double, Py_complex);
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PyAPI_FUNC(Py_complex) _Py_c_pow(Py_complex, Py_complex);
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PyAPI_FUNC(double) _Py_c_abs(Py_complex);
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/* Complex object interface */
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/*
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PyComplexObject represents a complex number with double-precision
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real and imaginary parts.
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*/
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typedef struct {
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PyObject_HEAD
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Py_complex cval;
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} PyComplexObject;
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PyAPI_FUNC(PyObject *) PyComplex_FromCComplex(Py_complex);
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PyAPI_FUNC(Py_complex) PyComplex_AsCComplex(PyObject *op);
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