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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: ***
*/
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