Danny Robson
f6056153e3
This places, at long last, the core library code into the same namespace as the extended library code.
38 lines
794 B
C++
38 lines
794 B
C++
/*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
*
|
|
* Copyright 2016 Danny Robson <danny@nerdcruft.net>
|
|
*/
|
|
|
|
|
|
#include "mwc64x.hpp"
|
|
|
|
#include "../debug.hpp"
|
|
|
|
using cruft::rand::mwc64x;
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
mwc64x::mwc64x (seed_type _seed):
|
|
m_state (_seed)
|
|
{
|
|
CHECK_NEZ (m_state);
|
|
}
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
mwc64x::value_type
|
|
mwc64x::operator() (void)
|
|
{
|
|
CHECK_NEZ (m_state);
|
|
|
|
uint32_t c = m_state >> 32u;
|
|
uint32_t x = m_state & 0xFFFFFFFFu;
|
|
|
|
m_state = x * 4294883355ULL + c;
|
|
|
|
return x ^ c;
|
|
}
|