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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).
63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
#ifndef Py_INTERNAL_FLOATOBJECT_H
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#define Py_INTERNAL_FLOATOBJECT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef Py_BUILD_CORE
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# error "this header requires Py_BUILD_CORE define"
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#endif
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#include "pycore_unicodeobject.h" // _PyUnicodeWriter
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/* runtime lifecycle */
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extern void _PyFloat_InitState(PyInterpreterState *);
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extern PyStatus _PyFloat_InitTypes(PyInterpreterState *);
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extern void _PyFloat_FiniType(PyInterpreterState *);
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/* other API */
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enum _py_float_format_type {
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_py_float_format_unknown,
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_py_float_format_ieee_big_endian,
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_py_float_format_ieee_little_endian,
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};
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struct _Py_float_runtime_state {
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enum _py_float_format_type float_format;
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enum _py_float_format_type double_format;
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};
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PyAPI_FUNC(void) _PyFloat_ExactDealloc(PyObject *op);
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extern void _PyFloat_DebugMallocStats(FILE* out);
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/* Format the object based on the format_spec, as defined in PEP 3101
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(Advanced String Formatting). */
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extern int _PyFloat_FormatAdvancedWriter(
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_PyUnicodeWriter *writer,
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PyObject *obj,
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PyObject *format_spec,
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Py_ssize_t start,
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Py_ssize_t end);
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extern PyObject* _Py_string_to_number_with_underscores(
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const char *str, Py_ssize_t len, const char *what, PyObject *obj, void *arg,
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PyObject *(*innerfunc)(const char *, Py_ssize_t, void *));
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extern double _Py_parse_inf_or_nan(const char *p, char **endptr);
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extern int _Py_convert_int_to_double(PyObject **v, double *dbl);
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_INTERNAL_FLOATOBJECT_H */
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