Chocobo1
8 years ago
8 changed files with 109 additions and 6 deletions
@ -0,0 +1,53 @@
@@ -0,0 +1,53 @@
|
||||
/*
|
||||
* Bittorrent Client using Qt and libtorrent. |
||||
* Copyright (C) 2017 Mike Tzou |
||||
* |
||||
* 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 "random.h" |
||||
|
||||
#include <cassert> |
||||
#include <chrono> |
||||
#include <random> |
||||
|
||||
// on some platform `std::random_device` may generate the same number sequence
|
||||
static bool hasTrueRandomDevice{ std::random_device{}() != std::random_device{}() }; |
||||
static thread_local std::mt19937 generator{ |
||||
hasTrueRandomDevice |
||||
? std::random_device{}() |
||||
: (std::random_device::result_type) std::chrono::system_clock::now().time_since_epoch().count() |
||||
}; |
||||
|
||||
uint32_t Utils::Random::rand(const uint32_t min, const uint32_t max) |
||||
{ |
||||
// better replacement for `std::rand`, don't use this for real cryptography application
|
||||
// min <= returned_value <= max
|
||||
assert(min <= max); |
||||
|
||||
// new distribution is cheap: http://stackoverflow.com/a/19036349
|
||||
std::uniform_int_distribution<uint32_t> uniform(min, max); |
||||
return uniform(generator); |
||||
} |
@ -0,0 +1,44 @@
@@ -0,0 +1,44 @@
|
||||
/*
|
||||
* Bittorrent Client using Qt and libtorrent. |
||||
* Copyright (C) 2017 Mike Tzou |
||||
* |
||||
* 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. |
||||
* |
||||
*/ |
||||
|
||||
#ifndef UTILS_RANDOM_H |
||||
#define UTILS_RANDOM_H |
||||
|
||||
#include <cstdint> |
||||
#include <cstdlib> |
||||
|
||||
namespace Utils |
||||
{ |
||||
namespace Random |
||||
{ |
||||
uint32_t rand(uint32_t min = 0, uint32_t max = UINT32_MAX); |
||||
} |
||||
} |
||||
|
||||
#endif // UTILS_FS_H
|
Loading…
Reference in new issue