/*
 * (C) Copyright 2005- ECMWF.
 *
 * This software is licensed under the terms of the Apache Licence Version 2.0
 * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
 *
 * In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
 * virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
 */

#pragma once

/* Return n to the power of s */
template <typename T>
constexpr T codes_power(long s, long n)
{
    T divisor = 1.0;
    if (s == 0)
        return 1.0;
    if (s == 1)
        return n;
    while (s < 0) {
        divisor /= n;
        s++;
    }
    while (s > 0) {
        divisor *= n;
        s--;
    }
    return divisor;
}