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+// mappers.cc                                             -*- C++ -*-
+/*
+
+Copyright (C) 1992, 1993 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 2, 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, write to the Free
+Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifdef __GNUG__
+#pragma implementation
+#endif
+
+#include <float.h>
+
+#include "mappers.h"
+#include "utils.h"
+
+#if defined (_AIX) && defined (__GNUG__)
+#undef finite
+#define finite(x) ((x) < DBL_MAX && (x) > -DBL_MAX)
+#endif
+
+/*
+ * Double -> double mappers.
+ */
+
+double
+arg (double x)
+{
+  return 0.0;
+}
+
+double
+conj (double x)
+{
+  return x;
+}
+
+double
+fix (double x)
+{
+  int tmp;
+  tmp = (int) x;
+  return (double) tmp;
+}
+
+double
+imag (double x)
+{
+  return 0.0;
+}
+
+double
+real (double x)
+{
+  return x;
+}
+
+double
+round (double x)
+{
+  return D_NINT (x);
+}
+
+double
+signum (double x)
+{
+  double tmp = 0.0;
+  if (x < 0.0)
+    tmp = -1.0;
+  else if (x > 0.0)
+    tmp = 1.0;
+  return tmp;
+}
+
+double
+xisnan (double x)
+{
+#if defined (HAVE_ISNAN)
+  return (double) isnan (x);
+#else
+  return 0;
+#endif
+}
+
+double
+xfinite (double x)
+{
+#if defined (HAVE_FINITE)
+  return (double) finite (x);
+#elif defined (HAVE_ISINF) && defined (HAVE_ISNAN)
+  return (double) (! isinf (x) && ! isnan (x));
+#else
+  return (double) (x > -DBL_MAX && x < DBL_MAX);
+#endif
+}
+
+double
+xisinf (double x)
+{
+#if defined (HAVE_ISINF)
+  return (double) isinf (x);
+#elif defined (HAVE_FINITE) && defined (HAVE_ISNAN)
+  return (double) (! (finite (x) || isnan (x)));
+#else
+  return (double) (x == DBL_MAX || x == -DBL_MAX);
+#endif
+}
+
+/*
+ * Complex -> double mappers.
+ */
+
+double
+xisnan (const Complex& x)
+{
+#if defined (HAVE_ISNAN)
+  double rx = real (x);
+  double ix = imag (x);
+  return (double) (isnan (rx) || isnan (ix));
+#else
+  return 0;
+#endif
+}
+
+double
+xfinite (const Complex& x)
+{
+  double rx = real (x);
+  double ix = imag (x);
+  return (double) (! ((int) xisinf (rx) || (int) xisinf (ix)));
+}
+
+double
+xisinf (const Complex& x)
+{
+  return (double) (! (int) xfinite (x));
+}
+
+/*
+ * Complex -> complex mappers.
+ */
+
+Complex
+acos (const Complex& x)
+{
+  static Complex i (0, 1);
+  Complex retval = -i * log (x + sqrt (x*x - 1.0));
+  return retval;
+}
+
+Complex
+acosh (const Complex& x)
+{
+  Complex retval = log (x + sqrt (x*x - 1.0));
+  return retval;
+}
+
+Complex
+asin (const Complex& x)
+{
+  static Complex i (0, 1);
+  Complex retval = -i * log (i*x + sqrt (1.0 - x*x));
+  return retval;
+}
+
+Complex
+asinh (const Complex& x)
+{
+  Complex retval = log (x + sqrt (x*x + 1.0));
+  return retval;
+}
+
+Complex
+atan (const Complex& x)
+{
+  static Complex i (0, 1);
+  Complex retval = i * log ((i + x) / (i - x)) / 2.0;
+  return retval;
+}
+
+Complex
+atanh (const Complex& x)
+{
+  static Complex i (0, 1);
+  Complex retval = log ((i + x) / (i - x)) / 2.0;
+  return retval;
+}
+
+Complex
+ceil (const Complex& x)
+{
+  int re = (int) ceil (real (x));
+  int im = (int) ceil (imag (x));
+  return Complex (re, im);
+}
+
+Complex
+fix (const Complex& x)
+{
+  int re = (int) real (x);
+  int im = (int) imag (x);
+  return Complex (re, im);
+}
+
+Complex
+floor (const Complex& x)
+{
+  int re = (int) floor (real (x));
+  int im = (int) floor (imag (x));
+  return Complex (re, im);
+}
+
+#ifndef M_LOG10E
+#define M_LOG10E 0.43429448190325182765
+#endif
+
+Complex
+log10 (const Complex& x)
+{
+  return M_LOG10E * log (x);
+}
+
+Complex
+round (const Complex& x)
+{
+  double re = D_NINT (real (x));
+  double im = D_NINT (imag (x));
+  return Complex (re, im);
+}
+
+Complex
+signum (const Complex& x)
+{
+  return x / abs (x);
+}
+
+Complex
+tan (const Complex& x)
+{
+  Complex retval = sin (x) / cos (x);
+  return retval;
+}
+
+Complex
+tanh (const Complex& x)
+{
+  Complex retval = sinh (x) / cosh (x);
+  return retval;
+}
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; page-delimiter: "^/\\*" ***
+;;; End: ***
+*/