1 /* <!-- copyright */ 2 /* 3 * aria2 - The high speed download utility 4 * 5 * Copyright (C) 2006 Tatsuhiro Tsujikawa 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 * 21 * In addition, as a special exception, the copyright holders give 22 * permission to link the code of portions of this program with the 23 * OpenSSL library under certain conditions as described in each 24 * individual source file, and distribute linked combinations 25 * including the two. 26 * You must obey the GNU General Public License in all respects 27 * for all of the code used other than OpenSSL. If you modify 28 * file(s) with this exception, you may extend this exception to your 29 * version of the file(s), but you are not obligated to do so. If you 30 * do not wish to do so, delete this exception statement from your 31 * version. If you delete this exception statement from all source 32 * files in the program, then also delete it here. 33 */ 34 /* copyright --> */ 35 #ifndef D_SEGMENT_H 36 #define D_SEGMENT_H 37 38 #include "common.h" 39 40 #include <stdint.h> 41 #include <string> 42 #include <memory> 43 44 namespace aria2 { 45 46 class Piece; 47 class WrDiskCache; 48 49 class Segment { 50 public: 51 virtual ~Segment() = default; 52 53 virtual bool complete() const = 0; 54 55 virtual size_t getIndex() const = 0; 56 57 virtual int64_t getPosition() const = 0; 58 59 virtual int64_t getPositionToWrite() const = 0; 60 61 virtual int64_t getLength() const = 0; 62 63 virtual int64_t getSegmentLength() const = 0; 64 65 virtual int64_t getWrittenLength() const = 0; 66 67 virtual void updateWrittenLength(int64_t bytes) = 0; 68 69 // `begin' is a offset inside this segment. 70 virtual bool updateHash(int64_t begin, const unsigned char* data, 71 size_t dataLength) = 0; 72 73 virtual bool isHashCalculated() const = 0; 74 75 virtual std::string getDigest() = 0; 76 77 virtual void clear(WrDiskCache* diskCache) = 0; 78 79 virtual std::shared_ptr<Piece> getPiece() const = 0; 80 81 bool operator==(const Segment& segment) const 82 { 83 return getIndex() == segment.getIndex(); 84 } 85 }; 86 87 } // namespace aria2 88 89 #endif // D_SEGMENT_H 90