/usr/include/octave-4.0.0/octave/sun-utils.h is in liboctave-dev 4.0.0-3ubuntu9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 | /*
Copyright (C) 1993-2015 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/>.
*/
#if !defined (octave_sun_utils_h)
#define octave_sun_utils_h 1
// This is only needed to dereference pointers to doubles if mixing
// GCC and Sun SPARC 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.
#if defined (__sparc) && defined (__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
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