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+++ b/liboctave/sun-utils.h
@@ -0,0 +1,89 @@
+// sun-utils.h                                           -*- 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.
+
+*/
+
+#if !defined (_sun_utils_h)
+#define _sun_utils_h 1
+
+#ifdef __GNUG__
+#pragma interface
+#endif
+
+#ifdef sun
+
+/*
+ * I think that this is really only needed if linking to Fortran
+ * compiled libraries on a Sun.  It should never be called.
+ * There should probably be a sysdep.cc file, eh?
+ */
+
+extern "C" int MAIN_ (void);
+
+/*
+ * This is only needed to dereference pointers to doubles if mixing
+ * GCC and Sun f77/cc compiled code.  See the GCC manual (where the
+ * function access_double() is described) and the Sun f77 manual,
+ * which explains that doubles are not always aligned on 8 byte
+ * boundaries.
+ */
+
+#ifdef __GNUC__
+
+inline double
+access_double (double *unaligned_ptr)
+{
+  union d2i { double d; int i[2]; };
+
+  union d2i *p = (union d2i *) unaligned_ptr;
+  union d2i u;
+
+  u.i[0] = p->i[0];
+  u.i[1] = p->i[1];
+
+  return u.d;
+}
+
+inline void
+assign_double (double *unaligned_ptr, double value)
+{
+  union d2i { double d; int i[2]; };
+
+  double *ptr = &value;
+  union d2i *v = (union d2i *) ptr;
+  union d2i *p = (union d2i *) unaligned_ptr;
+
+  p->i[0] = v->i[0];
+  p->i[1] = v->i[1];
+}
+
+#endif
+
+#endif
+
+#endif
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; page-delimiter: "^/\\*" ***
+;;; End: ***
+*/