## Copyright (C) 2008, 2009 David Bateman

##

## 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} {@var{newargs} =} __add_datasource__ (@var{fcn}, @var{h}, @var{data}, @var{varargin})

## Undocumented internal function.

## @end deftypefn

function newargs = __add_datasource__ (fcn, h, data, varargin)

  if (nargin < 3)

    error ("internal error");

  endif

  if (ischar (data))

    data = {data};

  endif

  for i = 1 : numel (data)

    addproperty (strcat (data{i}, "datasource"), h, "string", "");

  endfor

  i = 0;

  newargs = {};

  while (i < numel (varargin))

    arg = varargin{++i};

    if (i != numel(varargin) && ischar (arg)

	&& length (arg) > 9 && strcmpi (arg(end-9:end), "datasource"))

      arg = tolower (arg);

      val = varargin{++i};

      if (ischar (val))

	set (h, arg, val);

      else

	error ("%s: expecting data source to be a string", fcn);

      endif

    else

      newargs{end + 1} = arg;

    endif

  endwhile

endfunction