libsidplayfp 1.0.3
sidrandom.h
00001 /*
00002  * This file is part of libsidplayfp, a SID player engine.
00003  *
00004  *  Copyright 2012-2013 Leandro Nini <drfiemost@users.sourceforge.net>
00005  *
00006  *  This program is free software; you can redistribute it and/or modify
00007  *  it under the terms of the GNU General Public License as published by
00008  *  the Free Software Foundation; either version 2 of the License, or
00009  *  (at your option) any later version.
00010  *
00011  *  This program is distributed in the hope that it will be useful,
00012  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  *  GNU General Public License for more details.
00015  *
00016  *  You should have received a copy of the GNU General Public License
00017  *  along with this program; if not, write to the Free Software
00018  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
00019  */
00020 
00021 #ifndef SIDRANDOM_H
00022 #define SIDRANDOM_H
00023 
00027 class sidrandom
00028 {
00029 private:
00030     unsigned int m_seed;
00031 
00032 public:
00038     sidrandom(unsigned int seed) :
00039         m_seed(seed * 1103515245 + 12345) {}
00040 
00044     unsigned int next()
00045     {
00046         m_seed = m_seed * 13 + 1;
00047         return m_seed;
00048     }
00049 };
00050 
00051 #endif