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| 1 | +// libTorrent - BitTorrent library |
| 2 | +// Copyright (C) 2005-2007, Jari Sundell |
| 3 | +// |
| 4 | +// This program is free software; you can redistribute it and/or modify |
| 5 | +// it under the terms of the GNU General Public License as published by |
| 6 | +// the Free Software Foundation; either version 2 of the License, or |
| 7 | +// (at your option) any later version. |
| 8 | +// |
| 9 | +// This program is distributed in the hope that it will be useful, |
| 10 | +// but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | +// GNU General Public License for more details. |
| 13 | +// |
| 14 | +// You should have received a copy of the GNU General Public License |
| 15 | +// along with this program; if not, write to the Free Software |
| 16 | +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 | +// |
| 18 | +// In addition, as a special exception, the copyright holders give |
| 19 | +// permission to link the code of portions of this program with the |
| 20 | +// OpenSSL library under certain conditions as described in each |
| 21 | +// individual source file, and distribute linked combinations |
| 22 | +// including the two. |
| 23 | +// |
| 24 | +// You must obey the GNU General Public License in all respects for |
| 25 | +// all of the code used other than OpenSSL. If you modify file(s) |
| 26 | +// with this exception, you may extend this exception to your version |
| 27 | +// of the file(s), but you are not obligated to do so. If you do not |
| 28 | +// wish to do so, delete this exception statement from your version. |
| 29 | +// If you delete this exception statement from all source files in the |
| 30 | +// program, then also delete it here. |
| 31 | +// |
| 32 | +// Contact: Jari Sundell <[email protected]> |
| 33 | +// |
| 34 | +// Skomakerveien 33 |
| 35 | +// 3185 Skoppum, NORWAY |
| 36 | + |
| 37 | +#ifndef LIBTORRENT_NET_DATA_BUFFER_H |
| 38 | +#define LIBTORRENT_NET_DATA_BUFFER_H |
| 39 | + |
| 40 | +#include <memory> |
| 41 | +#include <inttypes.h> |
| 42 | + |
| 43 | +namespace torrent { |
| 44 | + |
| 45 | +// Recipient must call clear() when done with the buffer. |
| 46 | +struct DataBuffer { |
| 47 | + DataBuffer() : m_data(NULL), m_end(NULL), m_copied(false) {} |
| 48 | + DataBuffer(char* data, char* end) : m_data(data), m_end(end), m_copied(false) {} |
| 49 | + |
| 50 | + char* data() const { return m_data; } |
| 51 | + char* end() const { return m_end; } |
| 52 | + |
| 53 | + bool copied() const { return m_copied; } |
| 54 | + bool empty() const { return m_data == NULL; } |
| 55 | + size_t length() const { return m_end - m_data; } |
| 56 | + |
| 57 | + void clear(); |
| 58 | + void set(char* data, char* end, bool copied); |
| 59 | + |
| 60 | +private: |
| 61 | + char* m_data; |
| 62 | + char* m_end; |
| 63 | + |
| 64 | + // Used to indicate if buffer held by PCB is copied and needs to be |
| 65 | + // deleted after transmission. |
| 66 | + bool m_copied; |
| 67 | +}; |
| 68 | + |
| 69 | +inline void |
| 70 | +DataBuffer::clear() { |
| 71 | + if (!empty()) |
| 72 | + delete[] m_data; |
| 73 | + |
| 74 | + m_data = m_end = NULL; |
| 75 | + m_copied = false; |
| 76 | +} |
| 77 | + |
| 78 | +inline void |
| 79 | +DataBuffer::set(char* data, char* end, bool copied) { |
| 80 | + m_data = data; |
| 81 | + m_end = end; |
| 82 | + m_copied = copied; |
| 83 | +} |
| 84 | + |
| 85 | +} |
| 86 | + |
| 87 | +#endif |
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