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Use a new macro, PySequence_Fast_ITEMS to factor out code common to

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three recent optimizations.  Aside from reducing code volume, it
increases readability.
This commit is contained in:
Raymond Hettinger 2004-03-12 08:04:00 +00:00
parent 989ddc0709
commit c1e4f9dd92
4 changed files with 19 additions and 16 deletions
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19
Objects/listobject.c
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@ -491,12 +491,7 @@ list_ass_slice(PyListObject *a, int ilow, int ihigh, PyObject *v)
if(v_as_SF == NULL)
return -1;
n = PySequence_Fast_GET_SIZE(v_as_SF);
if (PyList_Check(v_as_SF))
vitem = ((PyListObject *)v_as_SF)->ob_item;
else {
assert (PyTuple_Check(v_as_SF));
vitem = ((PyTupleObject *)v_as_SF)->ob_item;
}
vitem = _PySequence_Fast_ITEMS(v_as_SF);
}
if (ilow < 0)
ilow = 0;
@ -691,12 +686,7 @@ listextend_internal(PyListObject *self, PyObject *b)
}
/* populate the end of self with b's items */
if (PyList_Check(b))
src = ((PyListObject *)b)->ob_item;
else {
assert (PyTuple_Check(b));
src = ((PyTupleObject *)b)->ob_item;
}
src = _PySequence_Fast_ITEMS(b);
dest = self->ob_item + selflen;
for (i = 0; i < blen; i++) {
PyObject *o = src[i];
@ -2571,10 +2561,7 @@ list_ass_subscript(PyListObject* self, PyObject* item, PyObject* value)
PyMem_MALLOC(slicelength*sizeof(PyObject*));
selfitems = self->ob_item;
if (PyList_Check(seq))
seqitems = ((PyListObject *)seq)->ob_item;
else
seqitems = ((PyTupleObject *)seq)->ob_item;
seqitems = _PySequence_Fast_ITEMS(seq);
for (cur = start, i = 0; i < slicelength;
cur += step, i++) {
garbage[i] = selfitems[cur];