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- // This may look like C code, but it is really -*- C++ -*-
- /*
- Copyright (C) 1988 Free Software Foundation
- written by Dirk Grunwald (grunwald@cs.uiuc.edu)
-
- This file is part of the GNU C++ Library. This library is free
- software; you can redistribute it and/or modify it under the terms of
- the GNU Library General Public License as published by the Free
- Software Foundation; either version 2 of the License, or (at your
- option) any later version. This library 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 Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free Software
- Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #ifndef _MLCG_h
- #define _MLCG_h 1
- #ifdef __GNUG__
- #pragma once
- #pragma interface
- #endif
-
- #include <xrng.h>
- #include <math.h>
-
- //
- // Multiplicative Linear Conguential Generator
- //
-
- class MLCG : public RNG {
- long initialSeedOne;
- long initialSeedTwo;
- long seedOne;
- long seedTwo;
-
- protected:
-
- public:
- MLCG(long seed1 = 0, long seed2 = 1);
- //
- // Return a long-words word of random bits
- //
- virtual unsigned long asLong();
- virtual void reset();
- long seed1();
- void seed1(long);
- long seed2();
- void seed2(long);
- void reseed(long, long);
- };
-
- #if defined(__OPTIMIZE__) || defined(USE_LIBGXX_INLINES)
-
- inline long
- MLCG::seed1()
- {
- return(seedOne);
- }
-
- inline void
- MLCG::seed1(long s)
- {
- initialSeedOne = s;
- reset();
- }
-
- inline long
- MLCG::seed2()
- {
- return(seedTwo);
- }
-
- inline void
- MLCG::seed2(long s)
- {
- initialSeedTwo = s;
- reset();
- }
-
- inline void
- MLCG::reseed(long s1, long s2)
- {
- initialSeedOne = s1;
- initialSeedTwo = s2;
- reset();
- }
-
- #endif
-
- #endif
-