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Finish the work on __round__ and __trunc__.

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With Alex Martelli and Keir Mierle.
This commit is contained in:
Guido van Rossum 2007-08-23 22:07:24 +00:00
parent 0f3cff58b2
commit 2fa33db12b
4 changed files with 173 additions and 60 deletions
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36
Objects/longobject.c
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@ -3592,9 +3592,45 @@ long_getN(PyLongObject *v, void *context) {
return PyLong_FromLong((intptr_t)context);
}
static PyObject *
long_round(PyObject *self, PyObject *args)
{
#define UNDEF_NDIGITS (-0x7fffffff) /* Unlikely ndigits value */
int ndigits = UNDEF_NDIGITS;
double x;
PyObject *res;
if (!PyArg_ParseTuple(args, "|i", &ndigits))
return NULL;
if (ndigits == UNDEF_NDIGITS)
return long_long(self);
/* If called with two args, defer to float.__round__(). */
x = PyLong_AsDouble(self);
if (x == -1.0 && PyErr_Occurred())
return NULL;
self = PyFloat_FromDouble(x);
if (self == NULL)
return NULL;
res = PyObject_CallMethod(self, "__round__", "i", ndigits);
Py_DECREF(self);
return res;
#undef UNDEF_NDIGITS
}
static PyMethodDef long_methods[] = {
{"conjugate", (PyCFunction)long_long, METH_NOARGS,
"Returns self, the complex conjugate of any int."},
{"__trunc__", (PyCFunction)long_long, METH_NOARGS,
"Truncating an Integral returns itself."},
{"__floor__", (PyCFunction)long_long, METH_NOARGS,
"Flooring an Integral returns itself."},
{"__ceil__", (PyCFunction)long_long, METH_NOARGS,
"Ceiling of an Integral returns itself."},
{"__round__", (PyCFunction)long_round, METH_VARARGS,
"Rounding an Integral returns itself.\n"
"Rounding with an ndigits arguments defers to float.__round__."},
{"__getnewargs__", (PyCFunction)long_getnewargs, METH_NOARGS},
{NULL, NULL} /* sentinel */
};