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Convert iterator __len__() methods to a private API.

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This commit is contained in:
Raymond Hettinger 2005-09-24 21:23:05 +00:00
parent 9ceebd5445
commit 6b27cda643
16 changed files with 169 additions and 94 deletions
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20
Objects/enumobject.c
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@ -239,23 +239,25 @@ PyDoc_STRVAR(reversed_doc,
"\n"
"Return a reverse iterator");
static int
static PyObject *
reversed_len(reversedobject *ro)
{
int position, seqsize;
if (ro->seq == NULL)
return 0;
return PyInt_FromLong(0);
seqsize = PySequence_Size(ro->seq);
if (seqsize == -1)
return -1;
return NULL;
position = ro->index + 1;
return (seqsize < position) ? 0 : position;
return PyInt_FromLong((seqsize < position) ? 0 : position);
}
static PySequenceMethods reversed_as_sequence = {
(inquiry)reversed_len, /* sq_length */
0, /* sq_concat */
PyDoc_STRVAR(length_cue_doc, "Private method returning an estimate of len(list(it)).");
static PyMethodDef reversediter_methods[] = {
{"_length_cue", (PyCFunction)reversed_len, METH_NOARGS, length_cue_doc},
{NULL, NULL} /* sentinel */
};
PyTypeObject PyReversed_Type = {
@ -272,7 +274,7 @@ PyTypeObject PyReversed_Type = {
0, /* tp_compare */
0, /* tp_repr */
0, /* tp_as_number */
&reversed_as_sequence, /* tp_as_sequence */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
@ -289,7 +291,7 @@ PyTypeObject PyReversed_Type = {
0, /* tp_weaklistoffset */
PyObject_SelfIter, /* tp_iter */
(iternextfunc)reversed_next, /* tp_iternext */
0, /* tp_methods */
reversediter_methods, /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */