mirror of
https://github.com/qbittorrent/qBittorrent.git
synced 2025-01-08 16:17:24 +03:00
70 lines
2.5 KiB
C++
70 lines
2.5 KiB
C++
/*
|
|
* Bittorrent Client using Qt and libtorrent.
|
|
* Copyright (C) 2022 Mike Tzou (Chocobo1)
|
|
*
|
|
* 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.
|
|
*
|
|
* In addition, as a special exception, the copyright holders give permission to
|
|
* link this program with the OpenSSL project's "OpenSSL" library (or with
|
|
* modified versions of it that use the same license as the "OpenSSL" library),
|
|
* and distribute the linked executables. You must obey the GNU General Public
|
|
* License in all respects for all of the code used other than "OpenSSL". If you
|
|
* modify file(s), you may extend this exception to your version of the file(s),
|
|
* but you are not obligated to do so. If you do not wish to do so, delete this
|
|
* exception statement from your version.
|
|
*/
|
|
|
|
#include "ltqbitarray.h"
|
|
|
|
#include <libtorrent/bitfield.hpp>
|
|
|
|
#include <QBitArray>
|
|
#include <QVarLengthArray>
|
|
|
|
namespace
|
|
{
|
|
unsigned char reverseByte(const unsigned char byte)
|
|
{
|
|
// https://graphics.stanford.edu/~seander/bithacks.html#BitReverseTable
|
|
static const unsigned char table[] =
|
|
{
|
|
#define R2(n) n, (n + (2 * 64)), (n + 64), (n + (3 * 64))
|
|
#define R4(n) R2(n), R2(n + (2 * 16)), R2(n + 16), R2(n + (3 * 16))
|
|
#define R6(n) R4(n), R4(n + (2 * 4)), R4(n + 4), R4(n + (3 * 4))
|
|
R6(0), R6(2), R6(1), R6(3)
|
|
#undef R6
|
|
#undef R4
|
|
#undef R2
|
|
};
|
|
return table[byte];
|
|
}
|
|
}
|
|
|
|
namespace BitTorrent::LT
|
|
{
|
|
QBitArray toQBitArray(const lt::bitfield &bits)
|
|
{
|
|
const int STACK_ALLOC_SIZE = 10 * 1024;
|
|
|
|
const char *bitsData = bits.data();
|
|
const int dataLength = (bits.size() + 7) / 8;
|
|
|
|
QVarLengthArray<char, STACK_ALLOC_SIZE> tmp(dataLength);
|
|
for (int i = 0; i < dataLength; ++i)
|
|
tmp[i] = reverseByte(bitsData[i]);
|
|
|
|
return QBitArray::fromBits(tmp.data(), bits.size());
|
|
}
|
|
}
|