1/* 2 * Copyright (c) 2023 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16#ifndef ENDIANUTIL_H 17#define ENDIANUTIL_H 18 19#include <cstdint> 20#include <type_traits> 21 22namespace EndianUtil { 23 bool IsBigEndian(); 24 25 template <class T, class = typename std::enable_if<std::is_integral<T>::value>::type> 26 T ToNetworkEndian(T data) 27 { 28 if (IsBigEndian()) { 29 return data; 30 } 31 32 union { 33 T data; 34 unsigned char buffer[sizeof(T)]; 35 } source, dest; 36 37 source.data = data; 38 for (std::size_t i = 0; i < sizeof(T); i++) { 39 dest.buffer[i] = source.buffer[sizeof(T) - i - 1]; 40 } 41 return dest.data; 42 } 43}; // namespace EndianUtil 44 45#endif // ENDIANUTIL_H 46