Function Strs_getitem

python/stringzilla.c:2001–2031

}

static PyObject *Strs_getitem(Strs *self, Py_ssize_t i) {

    // Check for negative index and convert to positive
    Py_ssize_t count = Strs_len(self);
    if (i < 0) i += count;
    if (i < 0 || i >= count) {
        PyErr_SetString(PyExc_IndexError, "Index out of range");
        return NULL;
    }

    get_string_at_offset_t getter = str_at_offset_getter(self);
    if (!getter) {
        PyErr_SetString(PyExc_TypeError, "Unknown Strs kind");
        return NULL;
    }

    PyObject *memory_owner = NULL;
    sz_cptr_t start = NULL;
    sz_size_t length = 0;
    getter(self, i, count, &memory_owner, &start, &length);

    // Create a new `Str` object
    Str *view_copy = (Str *)StrType.tp_alloc(&StrType, 0);
    if (view_copy == NULL && PyErr_NoMemory()) return NULL;

    view_copy->memory.start = start;
    view_copy->memory.length = length;
    view_copy->parent = memory_owner;
    Py_XINCREF(memory_owner);
    return view_copy;
}

/**
 *  This returns a `Strs` object of a potentially different layout: