src/base/global.h

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2016  Mike Tzou
   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 <type_traits>
  32 #include <QtGlobal>
  33
  34 #if (QT_POINTER_SIZE == 8)
  35 #define QBT_APP_64BIT
  36 #endif
  37
  38 inline const char C_TORRENT_FILE_EXTENSION[] = ".torrent";
  39 inline const int MAX_TORRENT_SIZE = 100 * 1024 * 1024; // 100 MiB
  40
  41 template <typename T>
  42 constexpr typename std::add_const_t<T> &asConst(T &t) noexcept { return t; }
  43
  44 // Forward rvalue as const
  45 template <typename T>
  46 constexpr typename std::add_const_t<T> asConst(T &&t) noexcept { return std::move(t); }
  47
  48 // Prevent const rvalue arguments
  49 template <typename T>
  50 void asConst(const T &&) = delete;