| /************************************************************ |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| #ifndef INTEGER_H_ |
| #define INTEGER_H_ |
| |
| #include <cstdint> |
| |
| namespace singa{ |
| static bool isNetworkOrder() { |
| int test = 1; |
| return (1 != *(uint8_t*)&test); |
| } |
| |
| template <typename T> |
| static inline T byteSwap(const T& v) { |
| int size = sizeof(v); |
| T ret; |
| uint8_t *dest = reinterpret_cast<uint8_t *>(&ret); |
| uint8_t *src = const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(&v)); |
| for (int i = 0; i < size; ++i) { |
| dest[i] = src[size - i - 1]; |
| } |
| return ret; |
| } |
| |
| template <typename T> |
| static inline T hton(const T& v) |
| { |
| return isNetworkOrder() ? v : byteSwap(v); |
| } |
| |
| template <typename T> |
| static inline T ntoh(const T& v) |
| { |
| return hton(v); |
| } |
| |
| static inline int appendInteger(char* buf) {return 0;} |
| static inline int readInteger(char* buf) {return 0;} |
| |
| template<typename Type, typename... Types> |
| static int appendInteger(char* buf, Type value, Types... values) { |
| *(Type*)buf = hton(value); |
| return sizeof(Type) + appendInteger(buf + sizeof(Type), values...); |
| } |
| |
| template<typename Type, typename... Types> |
| static int readInteger(char* buf, Type& value, Types&... values) { |
| value = ntoh(*(Type*)buf); |
| return sizeof(Type) + readInteger(buf + sizeof(Type), values...); |
| } |
| |
| } |
| #endif |