1551 _copy_characters(PyObject *to, Py_ssize_t to_start,  in _copy_characters()  argument
1561     assert(0 <= to_start);  in _copy_characters()
1568     assert(to_start + how_many <= PyUnicode_GET_LENGTH(to));  in _copy_characters()
1604         memcpy((char*)to_data + to_kind * to_start,  in _copy_characters()
1615             PyUnicode_2BYTE_DATA(to) + to_start  in _copy_characters()
1625             PyUnicode_4BYTE_DATA(to) + to_start  in _copy_characters()
1635             PyUnicode_4BYTE_DATA(to) + to_start  in _copy_characters()
1649                     PyUnicode_1BYTE_DATA(to) + to_start  in _copy_characters()
1659                     PyUnicode_1BYTE_DATA(to) + to_start  in _copy_characters()
1669                     PyUnicode_2BYTE_DATA(to) + to_start  in _copy_characters()
1685                 PyUnicode_WRITE(to_kind, to_data, to_start + i, ch);  in _copy_characters()
1694     PyObject *to, Py_ssize_t to_start,  in _PyUnicode_FastCopyCharacters()  argument
1697     (void)_copy_characters(to, to_start, from, from_start, how_many, 0);  in _PyUnicode_FastCopyCharacters()
1701 PyUnicode_CopyCharacters(PyObject *to, Py_ssize_t to_start,  in PyUnicode_CopyCharacters()  argument
1721     if ((size_t)to_start > (size_t)PyUnicode_GET_LENGTH(to)) {  in PyUnicode_CopyCharacters()
1730     if (to_start + how_many > PyUnicode_GET_LENGTH(to)) {  in PyUnicode_CopyCharacters()
1734                      how_many, to_start, PyUnicode_GET_LENGTH(to));  in PyUnicode_CopyCharacters()
1744     err = _copy_characters(to, to_start, from, from_start, how_many, 1);  in PyUnicode_CopyCharacters()