## Copyright (C) 1996, 1998, 2000, 2002, 2003, 2004, 2005, 2007
##               Auburn University.  All rights reserved.
##
## 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/>.

## -*- texinfo -*-
## @deftypefn {Function File} {} is_signal_list (@var{mylist})
## Return true if @var{mylist} is a list of individual strings.
## @end deftypefn

function flg = is_signal_list (mylist)

  if (nargin != 1)
    print_usage ();
  endif

  flg = iscell (mylist);
  if (flg)
    flg = (rows (mylist) == 1 || columns (mylist) == 1);
  endif
  if (flg)
    for ii = 1:length (mylist)
      if (! (ischar (mylist{ii}) && rows (mylist{ii}) == 1))
	flg = 0;
      endif
    endfor
  endif

endfunction