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fix one visible and several possible refleaks in rangeobject.c

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In some cases, the code was just reordered to allow for less decrefing.
This commit is contained in:
Benjamin Peterson 2009-11-16 00:34:25 +00:00
parent 91799ae3e1
commit 36fbb730a7
1 changed files with 17 additions and 20 deletions
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37
Objects/rangeobject.c
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@ -533,6 +533,7 @@ int_range_iter(long start, long stop, long step)
it->step = step;
ulen = get_len_of_range(start, stop, step);
if (ulen > (unsigned long)LONG_MAX) {
Py_DECREF(it);
PyErr_SetString(PyExc_OverflowError,
"range too large to represent as a range_iterator");
return NULL;
@ -584,16 +585,14 @@ longrangeiter_next(longrangeiterobject *r)
if (!one)
return NULL;
product = PyNumber_Multiply(r->index, r->step);
if (!product) {
Py_DECREF(one);
return NULL;
}
new_index = PyNumber_Add(r->index, one);
Py_DECREF(one);
if (!new_index) {
Py_DECREF(product);
if (!new_index)
return NULL;
product = PyNumber_Multiply(r->index, r->step);
if (!product) {
Py_DECREF(new_index);
return NULL;
}
@ -603,6 +602,9 @@ longrangeiter_next(longrangeiterobject *r)
Py_DECREF(r->index);
r->index = new_index;
}
else {
Py_DECREF(new_index);
}
return result;
}
@ -781,6 +783,9 @@ long_range:
if (!len)
goto create_failure;
/* Steal reference to len. */
it->len = len;
one = PyLong_FromLong(1);
if (!one)
goto create_failure;
@ -802,24 +807,16 @@ long_range:
goto create_failure;
it->step = PyNumber_Negative(range->step);
if (!it->step) {
Py_DECREF(it->start);
if (!it->step)
goto create_failure;
}
/* Steal reference to len. */
it->len = len;
it->index = PyLong_FromLong(0);
if (!it->index) {
Py_DECREF(it);
return NULL;
}
if (!it->index)
goto create_failure;
return (PyObject *)it;
create_failure:
Py_XDECREF(len);
PyObject_Del(it);
Py_DECREF(it);
return NULL;
}