1 /* 2 * Copyright (C) 2017 The Android Open Source Project 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 17 #ifndef NETUTILS_MATH_H 18 #define NETUTILS_MATH_H 19 20 #include <algorithm> 21 #include <cstdint> 22 23 namespace android { 24 namespace netdutils { 25 26 template <class T> mask(const int shift)27inline constexpr const T mask(const int shift) { 28 return (1 << shift) - 1; 29 } 30 31 // Align x up to the nearest integer multiple of 2^shift 32 template <class T> align(const T & x,const int shift)33inline constexpr const T align(const T& x, const int shift) { 34 return (x + mask<T>(shift)) & ~mask<T>(shift); 35 } 36 37 } // namespace netdutils 38 } // namespace android 39 40 #endif /* NETUTILS_MATH_H */ 41