98 lines
1.9 KiB
C++
98 lines
1.9 KiB
C++
// This may look like C code, but it is really -*- C++ -*-
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/*
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Copyright (C) 1988 Free Software Foundation
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written by Dirk Grunwald (grunwald@cs.uiuc.edu)
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This file is part of GNU CC.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY. No author or distributor
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accepts responsibility to anyone for the consequences of using it
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or for whether it serves any particular purpose or works at all,
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unless he says so in writing. Refer to the GNU CC General Public
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License for full details.
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Everyone is granted permission to copy, modify and redistribute
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GNU CC, but only under the conditions described in the
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GNU CC General Public License. A copy of this license is
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supposed to have been given to you along with GNU CC so you
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can know your rights and responsibilities. It should be in a
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file named COPYING. Among other things, the copyright notice
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and this notice must be preserved on all copies.
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*/
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#ifndef _MLCG_h
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#define _MLCG_h 1
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#ifdef __GNUG__
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#pragma once
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#pragma interface
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#endif
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#include <RNG.h>
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#include <math.h>
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//
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// Multiplicative Linear Conguential Generator
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//
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class MLCG : public RNG {
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long initialSeedOne;
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long initialSeedTwo;
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long seedOne;
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long seedTwo;
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protected:
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public:
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MLCG(long seed1 = 0, long seed2 = 1);
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//
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// Return a long-words word of random bits
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//
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virtual unsigned long asLong();
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virtual void reset();
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long seed1();
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void seed1(long);
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long seed2();
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void seed2(long);
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void reseed(long, long);
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};
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#if defined(__OPTIMIZE__) || defined(USE_LIBGXX_INLINES)
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inline long
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MLCG::seed1()
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{
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return(seedOne);
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}
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inline void
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MLCG::seed1(long s)
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{
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initialSeedOne = s;
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reset();
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}
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inline long
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MLCG::seed2()
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{
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return(seedTwo);
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}
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inline void
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MLCG::seed2(long s)
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{
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initialSeedTwo = s;
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reset();
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}
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inline void
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MLCG::reseed(long s1, long s2)
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{
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initialSeedOne = s1;
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initialSeedTwo = s2;
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reset();
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}
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#endif
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#endif
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