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Clean up float.as_integer_ratio().

This commit is contained in:
Serhiy Storchaka 2015-12-29 22:55:48 +02:00
parent 0d250bc119
commit 4e6aad1f7a
1 changed files with 16 additions and 20 deletions
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36
Objects/floatobject.c
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@ -1451,18 +1451,12 @@ float_as_integer_ratio(PyObject *v, PyObject *unused)
int exponent;
int i;
PyObject *prev;
PyObject *py_exponent = NULL;
PyObject *numerator = NULL;
PyObject *denominator = NULL;
PyObject *result_pair = NULL;
PyNumberMethods *long_methods = PyLong_Type.tp_as_number;
#define INPLACE_UPDATE(obj, call) \
prev = obj; \
obj = call; \
Py_DECREF(prev); \
CONVERT_TO_DOUBLE(v, self);
if (Py_IS_INFINITY(self)) {
@ -1489,29 +1483,31 @@ float_as_integer_ratio(PyObject *v, PyObject *unused)
to be truncated by PyLong_FromDouble(). */
numerator = PyLong_FromDouble(float_part);
if (numerator == NULL) goto error;
if (numerator == NULL)
goto error;
denominator = PyLong_FromLong(1);
if (denominator == NULL)
goto error;
py_exponent = PyLong_FromLong(Py_ABS(exponent));
if (py_exponent == NULL)
goto error;
/* fold in 2**exponent */
denominator = PyLong_FromLong(1);
py_exponent = PyLong_FromLong(labs((long)exponent));
if (py_exponent == NULL) goto error;
INPLACE_UPDATE(py_exponent,
long_methods->nb_lshift(denominator, py_exponent));
if (py_exponent == NULL) goto error;
if (exponent > 0) {
INPLACE_UPDATE(numerator,
long_methods->nb_multiply(numerator, py_exponent));
if (numerator == NULL) goto error;
Py_SETREF(numerator,
long_methods->nb_lshift(numerator, py_exponent));
if (numerator == NULL)
goto error;
}
else {
Py_DECREF(denominator);
denominator = py_exponent;
py_exponent = NULL;
Py_SETREF(denominator,
long_methods->nb_lshift(denominator, py_exponent));
if (denominator == NULL)
goto error;
}
result_pair = PyTuple_Pack(2, numerator, denominator);
#undef INPLACE_UPDATE
error:
Py_XDECREF(py_exponent);
Py_XDECREF(denominator);