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/*
Copyright (C) 2010 Olaf Till
This program 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.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <octave/oct.h>
#include <octave/ov-struct.h>
DEFUN_DLD (fieldempty, args, ,
"-*- texinfo -*-\n\
@deftypefn {Loadable Function} {} fieldempty (@var{s}, @var{name})\n\
Returns a logical array with same dimensions as structure @var{s}, indicating where field @var{name} is empty.\n\
@end deftypefn")
{
std::string fname ("fieldempty");
if (args.length () != 2)
{
print_usage ();
return octave_value_list ();
}
octave_map s = args(0).map_value ();
if (error_state)
{
error ("%s: first argument must be a structure", fname.c_str ());
return octave_value_list ();
}
std::string name = args(1).string_value ();
if (error_state)
{
error ("%s: second argument must be a string", fname.c_str ());
return octave_value_list ();
}
if (! s.contains (name))
{
error ("%s: no such field", fname.c_str ());
return octave_value_list ();
}
dim_vector sdims = s.dims ();
boolNDArray retval (sdims);
octave_idx_type numel = s.numel ();
if (! numel)
return octave_value (retval);
Cell c (s.contents (name));
for (octave_idx_type i = 0; i < numel; i++)
{
if (c(i).numel ())
retval(i) = false;
else
retval(i) = true;
}
return octave_value (retval);
}