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bpo-36763: Implement PyWideStringList_Insert() of PEP 587 (GH-15423)

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(cherry picked from commit 3842f2997f)

Co-authored-by: Victor Stinner <vstinner@redhat.com>
This commit is contained in:
Miss Islington (bot) 2019-08-23 09:24:42 -07:00 • committed by GitHub
parent fe64ba611b
commit a6427cb2a2
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5 changed files with 51 additions and 13 deletions
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29
Python/initconfig.c
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@ -297,32 +297,53 @@ _PyWideStringList_Copy(PyWideStringList *list, const PyWideStringList *list2)
PyStatus
PyWideStringList_Append(PyWideStringList *list, const wchar_t *item)
PyWideStringList_Insert(PyWideStringList *list,
Py_ssize_t index, const wchar_t *item)
{
if (list->length == PY_SSIZE_T_MAX) {
Py_ssize_t len = list->length;
if (len == PY_SSIZE_T_MAX) {
/* length+1 would overflow */
return _PyStatus_NO_MEMORY();
}
if (index < 0) {
return _PyStatus_ERR("PyWideStringList_Insert index must be >= 0");
}
if (index > len) {
index = len;
}
wchar_t *item2 = _PyMem_RawWcsdup(item);
if (item2 == NULL) {
return _PyStatus_NO_MEMORY();
}
size_t size = (list->length + 1) * sizeof(list->items[0]);
size_t size = (len + 1) * sizeof(list->items[0]);
wchar_t **items2 = (wchar_t **)PyMem_RawRealloc(list->items, size);
if (items2 == NULL) {
PyMem_RawFree(item2);
return _PyStatus_NO_MEMORY();
}
items2[list->length] = item2;
if (index < len) {
memmove(&items2[index + 1],
&items2[index],
(len - index) * sizeof(items2[0]));
}
items2[index] = item2;
list->items = items2;
list->length++;
return _PyStatus_OK();
}
PyStatus
PyWideStringList_Append(PyWideStringList *list, const wchar_t *item)
{
return PyWideStringList_Insert(list, list->length, item);
}
PyStatus
_PyWideStringList_Extend(PyWideStringList *list, const PyWideStringList *list2)
{