Function string_converter_helper

numpy/core/src/multiarray/conversion_utils.c:442–488

}

static int
string_converter_helper(
    PyObject *object,
    void *out,
    int (*str_func)(char const*, Py_ssize_t, void*),
    char const *name,
    char const *message)
{
    /* allow bytes for compatibility */
    PyObject *str_object = NULL;
    if (PyBytes_Check(object)) {
        str_object = PyUnicode_FromEncodedObject(object, NULL, NULL);
        if (str_object == NULL) {
            PyErr_Format(PyExc_ValueError,
                "%s %s (got %R)", name, message, object);
            return NPY_FAIL;
        }
    }
    else if (PyUnicode_Check(object)) {
        str_object = object;
        Py_INCREF(str_object);
    }
    else {
        PyErr_Format(PyExc_TypeError,
            "%s must be str, not %s", name, Py_TYPE(object)->tp_name);
        return NPY_FAIL;
    }

    Py_ssize_t length;
    char const *str = PyUnicode_AsUTF8AndSize(str_object, &length);
    if (str == NULL) {
        Py_DECREF(str_object);
        return NPY_FAIL;
    }

    int ret = str_func(str, length, out);
    Py_DECREF(str_object);
    if (ret < 0) {
        /* str_func returns -1 without an exception if the value is wrong */
        if (!PyErr_Occurred()) {
            PyErr_Format(PyExc_ValueError,
                "%s %s (got %R)", name, message, object);
        }
        return NPY_FAIL;
    }
    return NPY_SUCCEED;
}

static int byteorder_parser(char const *str, Py_ssize_t length, void *data)
{