1/*
2 * Copyright 2017 Uber Technologies, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16/** @file mathExtensions.c
17 * @brief Math functions that should've been in math.h but aren't
18 */
19
20#include "mathExtensions.h"
21
22/**
23 * _ipow does integer exponentiation efficiently. Taken from StackOverflow.
24 *
25 * @param base the integer base
26 * @param exp the integer exponent
27 *
28 * @return the exponentiated value
29 */
30int _ipow(int base, int exp) {
31 int result = 1;
32 while (exp) {
33 if (exp & 1) result *= base;
34 exp >>= 1;
35 base *= base;
36 }
37
38 return result;
39}
40