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- // sun-utils.h -*- C++ -*-
- /*
-
- Copyright (C) 1992, 1993, 1994, 1995 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 (octave_sun_utils_h)
- #define octave_sun_utils_h 1
-
- extern "C++" {
-
- #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
-
- } // extern "C++"
-
- /*
- ;;; Local Variables: ***
- ;;; mode: C++ ***
- ;;; page-delimiter: "^/\\*" ***
- ;;; End: ***
- */
-