Function Hasher_init

python/stringzilla.c:5877–5917

}

static int Hasher_init(Hasher *self, PyObject *args, PyObject *kwargs) {
    // Positional seed
    Py_ssize_t nargs = PyTuple_Size(args);
    if (nargs > 1) {
        PyErr_SetString(PyExc_TypeError, "Hasher() takes at most 1 positional argument");
        return -1;
    }
    PyObject *seed_obj = nargs == 1 ? PyTuple_GET_ITEM(args, 0) : NULL;
    // Keyword seed
    if (kwargs) {
        PyObject *kw_seed = PyDict_GetItemString(kwargs, "seed");
        if (kw_seed) {
            if (seed_obj) {
                PyErr_SetString(PyExc_TypeError, "seed specified twice");
                return -1;
            }
            seed_obj = kw_seed;
        }
        // Check for unexpected kwargs
        Py_ssize_t pos = 0;
        PyObject *key, *value;
        while (PyDict_Next(kwargs, &pos, &key, &value)) {
            if (PyUnicode_CompareWithASCIIString(key, "seed") != 0) {
                PyErr_Format(PyExc_TypeError, "unexpected keyword argument: %S", key);
                return -1;
            }
        }
    }
    unsigned long long seed = 0ULL;
    if (seed_obj) {
        if (!PyLong_Check(seed_obj)) {
            PyErr_SetString(PyExc_TypeError, "seed must be an integer");
            return -1;
        }
        seed = PyLong_AsUnsignedLongLong(seed_obj);
        if (PyErr_Occurred()) return -1;
    }
    self->seed = (sz_u64_t)seed;
    sz_hash_state_init(&self->state, self->seed);
    return 0;
}

static PyObject *Hasher_update(PyObject *self_obj, PyObject *arg) {
    Hasher *self = (Hasher *)self_obj;