home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Geek Gadgets 1
/
ADE-1.bin
/
ade-dist
/
libg++-2.7.1-bin.lha
/
lib
/
g++-include
/
RNG.h
< prev
next >
Wrap
C/C++ Source or Header
|
1996-10-12
|
2KB
|
59 lines
// 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _RNG_h
#define _RNG_h 1
#ifdef __GNUG__
#pragma interface
#endif
#include <assert.h>
#include <math.h>
#include <_G_config.h>
union PrivateRNGSingleType { // used to access floats as unsigneds
float s;
_G_uint32_t u;
};
union PrivateRNGDoubleType { // used to access doubles as unsigneds
double d;
_G_uint32_t u[2];
};
//
// Base class for Random Number Generators. See ACG and MLCG for instances.
//
class RNG {
static PrivateRNGSingleType singleMantissa; // mantissa bit vector
static PrivateRNGDoubleType doubleMantissa; // mantissa bit vector
public:
RNG();
//
// Return a long-words word of random bits
//
virtual _G_uint32_t asLong() = 0;
virtual void reset() = 0;
//
// Return random bits converted to either a float or a double
//
float asFloat();
double asDouble();
};
#endif