/usr/include/libktorrent/util/circularbuffer.h is in libktorrent-dev 1.3.1-5.
This file is owned by root:root, with mode 0o644.
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* Copyright (C) 2010 by Joris Guisson *
* joris.guisson@gmail.com *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef BT_CIRCULARBUFFER_H
#define BT_CIRCULARBUFFER_H
#include <ktorrent_export.h>
#include <util/constants.h>
#include <utility>
namespace bt
{
/**
Circular buffer class
*/
class KTORRENT_EXPORT CircularBuffer
{
public:
CircularBuffer(bt::Uint32 cap = 64 * 1024);
virtual ~CircularBuffer();
/**
Read up to max_len bytes from the buffer and store it in data
@param ptr The place to store the data
@param max_len Maximum amount to read
@return The amount read
*/
virtual bt::Uint32 read(bt::Uint8* ptr,bt::Uint32 max_len);
/**
Write up to len bytes from data and store it in the window.
@param ptr The data to copy
@param max_len Amount to write
@return The amount written
*/
virtual bt::Uint32 write(const bt::Uint8* ptr,bt::Uint32 len);
/// Is the buffer empty
bool empty() const {return buf_size == 0;}
/// Is the buffer full
bool full() const {return buf_size == buf_capacity;}
/// How much of the buffer is used
bt::Uint32 size() const {return buf_size;}
/// How much capacity is available
bt::Uint32 capacity() const {return buf_capacity;}
/// Get the available space
bt::Uint32 available() const {return buf_capacity - buf_size;}
private:
typedef std::pair<bt::Uint8*,bt::Uint32> Range;
/// Get the first range
Range firstRange();
Range secondRange();
private:
bt::Uint8* data;
bt::Uint32 buf_capacity;
bt::Uint32 start;
bt::Uint32 buf_size;
};
}
#endif // BT_CIRCULARBUFFER_H
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