Function arr__monotonicity

numpy/core/src/multiarray/compiled_base.c:232–266

Internal function to expose check_array_monotonic to python */

/* Internal function to expose check_array_monotonic to python */
NPY_NO_EXPORT PyObject *
arr__monotonicity(PyObject *NPY_UNUSED(self), PyObject *args, PyObject *kwds)
{
    static char *kwlist[] = {"x", NULL};
    PyObject *obj_x = NULL;
    PyArrayObject *arr_x = NULL;
    long monotonic;
    npy_intp len_x;
    NPY_BEGIN_THREADS_DEF;

    if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|_monotonicity", kwlist,
                                     &obj_x)) {
        return NULL;
    }

    /*
     * TODO:
     *  `x` could be strided, needs change to check_array_monotonic
     *  `x` is forced to double for this check
     */
    arr_x = (PyArrayObject *)PyArray_FROMANY(
        obj_x, NPY_DOUBLE, 1, 1, NPY_ARRAY_CARRAY_RO);
    if (arr_x == NULL) {
        return NULL;
    }

    len_x = PyArray_SIZE(arr_x);
    NPY_BEGIN_THREADS_THRESHOLDED(len_x)
    monotonic = check_array_monotonic(
        (const double *)PyArray_DATA(arr_x), len_x);
    NPY_END_THREADS
    Py_DECREF(arr_x);

    return PyLong_FromLong(monotonic);
}

/*
 * Returns input array with values inserted sequentially into places