8000 Factor-out two substantially identical code blocks. by rhettinger · Pull Request #8219 · python/cpython · GitHub
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Factor-out two substantially identical code blocks. #8219

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Merged
merged 2 commits into from
Jul 10, 2018
Merged

Factor-out two substantially identical code blocks. #8219

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f36ebb7
Fold extend()
rhettinger Jul 10, 2018
fac78ae
Fold extendleft()
rhettinger Jul 10, 2018
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Fold extend()
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@rhettinger
rhettinger committed Jul 10, 2018
commit f36ebb71e31b6dd4cd45bb0375d2bf03d4ba94ef
28 changes: 5 additions & 23 deletions Modules/_collectionsmodule.c
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Original file line number Diff line number Diff line change
Expand Up @@ -301,7 +301,7 @@ deque_append(dequeobject *deque, PyObject *item)

PyDoc_STRVAR(append_doc, "Add an element to the right side of the deque.");

static int
static inline int
deque_appendleft_internal(dequeobject *deque, PyObject *item, Py_ssize_t maxlen)
{
if (deque->leftindex == 0) {
Expand Down Expand Up @@ -403,28 +403,10 @@ deque_extend(dequeobject *deque, PyObject *iterable)

iternext = *Py_TYPE(it)->tp_iternext;
while ((item = iternext(it)) != NULL) {
if (deque->rightindex == BLOCKLEN - 1) {
block *b = newblock();
if (b == NULL) {
Py_DECREF(item);
Py_DECREF(it);
return NULL;
}
b->leftlink = deque->rightblock;
CHECK_END(deque->rightblock->rightlink);
deque->rightblock->rightlink = b;
deque->rightblock = b;
MARK_END(b->rightlink);
deque->rightindex = -1;
}
Py_SIZE(deque)++;
deque->rightindex++;
deque->rightblock->data[deque->rightindex] = item;
if (NEEDS_TRIM(deque, maxlen)) {
PyObject *olditem = deque_popleft(deque, NULL);
Py_DECREF(olditem);
} else {
deque->state++;
if (deque_append_internal(deque, item, maxlen) == -1) {
Py_DECREF(item);
Py_DECREF(it);
return NULL;
}
}
return finalize_iterator(it);
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