initial import of NetBSD tree

1 files changed, 60 insertions, 0 deletions

diff --git a/gnu/lib/libg++/g++-include/RNG.h b/gnu/lib/libg++/g++-include/RNG.h
new file mode 100644
index 00000000000..3105b3eb5c0
--- /dev/null
+++ b/gnu/lib/libg++/g++-include/RNG.h
@@ -0,0 +1,60 @@
+// 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.
+
+	$Id: RNG.h,v 1.1 1995/10/18 08:38:17 deraadt Exp $
+*/
+
+#ifndef _RNG_h
+#define _RNG_h 1
+#ifdef __GNUG__
+#pragma interface
+#endif
+
+#include <assert.h>
+#include <math.h>
+
+union PrivateRNGSingleType {		   	// used to access floats as unsigneds
+    float s;
+    unsigned long u;
+};
+
+union PrivateRNGDoubleType {		   	// used to access doubles as unsigneds
+    double d;
+    unsigned long 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 unsigned long asLong() = 0;
+    virtual void reset() = 0;
+    //
+    // Return random bits converted to either a float or a double
+    //
+    float asFloat();
+    double asDouble();
+};
+
+#endif