1 /* 2 * Bittorrent Client using Qt and libtorrent. 3 * Copyright (C) 2020 Mike Tzou (Chocobo1) 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License 7 * as published by the Free Software Foundation; either version 2 8 * of the License, or (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 18 * 19 * In addition, as a special exception, the copyright holders give permission to 20 * link this program with the OpenSSL project's "OpenSSL" library (or with 21 * modified versions of it that use the same license as the "OpenSSL" library), 22 * and distribute the linked executables. You must obey the GNU General Public 23 * License in all respects for all of the code used other than "OpenSSL". If you 24 * modify file(s), you may extend this exception to your version of the file(s), 25 * but you are not obligated to do so. If you do not wish to do so, delete this 26 * exception statement from your version. 27 */ 28 29 #pragma once 30 31 #include <iterator> 32 #include <memory> 33 34 class QByteArray; 35 class QFileDevice; 36 37 namespace Utils::IO 38 { 39 // A wrapper class that satisfy LegacyOutputIterator requirement 40 class FileDeviceOutputIterator 41 { 42 public: 43 // std::iterator_traits 44 using iterator_category = std::output_iterator_tag; 45 using difference_type = void; 46 using value_type = void; 47 using pointer = void; 48 using reference = void; 49 50 explicit FileDeviceOutputIterator(QFileDevice &device, const int bufferSize = (4 * 1024)); 51 FileDeviceOutputIterator(const FileDeviceOutputIterator &other) = default; 52 ~FileDeviceOutputIterator(); 53 54 // mimic std::ostream_iterator behavior 55 FileDeviceOutputIterator &operator=(char c); 56 57 constexpr FileDeviceOutputIterator &operator*() 58 { 59 return *this; 60 } 61 62 constexpr FileDeviceOutputIterator &operator++() 63 { 64 return *this; 65 } 66 67 constexpr FileDeviceOutputIterator &operator++(int) 68 { 69 return *this; 70 } 71 72 private: 73 QFileDevice *m_device; 74 std::shared_ptr<QByteArray> m_buffer; 75 int m_bufferSize; 76 }; 77 } 78