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#include <sstream> 18 19#include "netdutils/Slice.h" 20 21namespace android { 22namespace netdutils { 23namespace { 24 25// Convert one byte to a two character hexadecimal string 26const std::string toHex(uint8_t byte) { 27 const std::array<char, 16> kLookup = { 28 {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'}}; 29 return {kLookup[byte >> 4], kLookup[byte & 0xf]}; 30} 31 32} // namespace 33 34std::string toString(const Slice s) { 35 return std::string(reinterpret_cast<char*>(s.base()), s.size()); 36} 37 38std::string toHex(const Slice s, int wrap) { 39 Slice tail = s; 40 int count = 0; 41 std::stringstream ss; 42 while (!tail.empty()) { 43 uint8_t byte = 0; 44 extract(tail, byte); 45 ss << toHex(byte); 46 if ((++count % wrap) == 0) { 47 ss << "\n"; 48 } 49 tail = drop(tail, 1); 50 } 51 return ss.str(); 52} 53 54std::ostream& operator<<(std::ostream& os, const Slice& slice) { 55 return os << std::hex << "Slice[base: " << reinterpret_cast<void*>(slice.base()) 56 << ", limit: " << reinterpret_cast<void*>(slice.limit()) << ", size: 0x" 57 << slice.size() << "]" << std::dec; 58} 59 60} // namespace netdutils 61} // namespace android 62