--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/liboctave/floatDET.cc	Sun Apr 27 22:34:17 2008 +0200
@@ -0,0 +1,84 @@
+/*
+
+Copyright (C) 1994, 1995, 1996, 1997, 2002, 2003, 2004, 2005, 2006,
+              2007 John W. Eaton
+
+This file is part of Octave.
+
+Octave is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 3 of the License, or (at your
+option) any later version.
+
+Octave 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 General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with Octave; see the file COPYING.  If not, see
+<http://www.gnu.org/licenses/>.
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <cfloat>
+
+#include "floatDET.h"
+#include "lo-mappers.h"
+#include "lo-math.h"
+
+bool
+FloatDET::value_will_overflow (void) const
+{
+  return base2
+    ? (e2 + 1 > xlog2 (DBL_MAX) ? 1 : 0)
+    : (e10 + 1 > log10 (DBL_MAX) ? 1 : 0);
+}
+
+bool
+FloatDET::value_will_underflow (void) const
+{
+  return base2
+    ? (e2 - 1 < xlog2 (DBL_MIN) ? 1 : 0)
+    : (e10 - 1 < log10 (DBL_MIN) ? 1 : 0);
+}
+
+void
+FloatDET::initialize10 (void)
+{
+  if (c2 != 0.0)
+    {
+      float etmp = e2 / xlog2 (static_cast<float>(10));
+      e10 = static_cast<int> (xround (etmp));
+      etmp -= e10;
+      c10 = c2 * pow (10.0, etmp);
+    }
+}
+
+void
+FloatDET::initialize2 (void)
+{
+  if (c10 != 0.0)
+    {
+      float etmp = e10 / log10 (2.0);
+      e2 = static_cast<int> (xround (etmp));
+      etmp -= e2;
+      c2 = c10 * xexp2 (etmp);
+    }
+}
+
+float
+FloatDET::value (void) const
+{
+  return base2 ? c2 * xexp2 (static_cast<float>(e2)) : c10 * pow (10.0, e10);
+}
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; End: ***
+*/