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ov-range.cc
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1996-12-20
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/*
Copyright (C) 1996 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#if defined (__GNUG__)
#pragma implementation
#endif
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "lo-ieee.h"
#include "lo-utils.h"
#include "gripes.h"
#include "ops.h"
#include "ov-range.h"
#include "ov-re-mat.h"
#include "ov-scalar.h"
#include "pr-output.h"
octave_allocator
octave_range::allocator (sizeof (octave_range));
int
octave_range::t_id (-1);
const string
octave_range::t_name ("range");
static octave_value *
default_numeric_conversion_function (const octave_value& a)
{
CAST_CONV_ARG (const octave_range&);
return new octave_matrix (v.matrix_value ());
}
type_conv_fcn
octave_range::numeric_conversion_function (void) const
{
return default_numeric_conversion_function;
}
octave_value *
octave_range::try_narrowing_conversion (void)
{
octave_value *retval = 0;
switch (range.nelem ())
{
case 1:
retval = new octave_scalar (range.base ());
break;
case 0:
retval = new octave_matrix (Matrix ());
break;
default:
break;
}
return retval;
}
octave_value
octave_range::index (const octave_value_list& idx) const
{
// XXX FIXME XXX -- this doesn't solve the problem of
//
// a = 1:5; a(1, 1, 1)
//
// and similar constructions. Hmm...
// XXX FIXME XXX -- using this constructor avoids possibly narrowing
// the range to a scalar value. Need a better solution to this
// problem.
octave_value tmp (new octave_matrix (range.matrix_value ()));
return tmp.index (idx);
}
double
octave_range::double_value (bool) const
{
double retval = octave_NaN;
int nel = range.nelem ();
if (nel == 1 || (nel > 1 && Vdo_fortran_indexing))
retval = range.base ();
else
gripe_invalid_conversion ("range", "real scalar");
return retval;
}
octave_value
octave_range::all (void) const
{
// XXX FIXME XXX -- this is a potential waste of memory.
Matrix m = range.matrix_value ();
return m.all ();
}
octave_value
octave_range::any (void) const
{
return (double) (range.base () != 0.0 || range.nelem () > 1);
}
bool
octave_range::is_true (void) const
{
bool retval = false;
if (range.nelem () == 0)
{
int flag = Vpropagate_empty_matrices;
if (flag < 0)
warning ("empty range used in conditional expression");
else if (flag == 0)
error ("empty range used in conditional expression");
}
else
{
// XXX FIXME XXX -- this is a potential waste of memory.
Matrix m ((range.matrix_value () . all ()) . all ());
retval = (m.rows () == 1 && m.columns () == 1 && m (0, 0) != 0.0);
}
return retval;
}
Complex
octave_range::complex_value (bool) const
{
Complex retval (octave_NaN, octave_NaN);
int nel = range.nelem ();
if (nel == 1 || (nel > 1 && Vdo_fortran_indexing))
retval = range.base ();
else
gripe_invalid_conversion ("range", "complex scalar");
return retval;
}
octave_value
octave_range::not (void) const
{
Matrix tmp (range.matrix_value ());
return (! tmp);
}
octave_value
octave_range::transpose (void) const
{
Matrix tmp (range.matrix_value ());
return tmp.transpose ();
}
octave_value
octave_range::hermitian (void) const
{
Matrix tmp (range.matrix_value ());
return tmp.transpose ();
}
octave_value
octave_range::convert_to_str (void) const
{
octave_value tmp (range.matrix_value ());
return tmp.convert_to_str ();
}
void
octave_range::print (ostream& os, bool pr_as_read_syntax)
{
octave_print_internal (os, range, pr_as_read_syntax, struct_indent);
}
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/