## Copyright (C) 2000, 2006, 2007, 2009 Etienne Grossmann
##
## 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} address@hidden, @dots{}, @var{v1}] =} setfield (@var{s}, @var{k1}, @var{v1}, @dots{})
## Set field members in a structure.
##
## @example
## @group
## oo(1,1).f0 = 1;
## oo = setfield (oo, @{1,address@hidden, "fd", @address@hidden, "b", 6);
## oo(1,2).fd(3).b == 6
## @result{} ans = 1
## @end group
## @end example
##
## Note that this function could be written
##
## @example
## @group
## i1 = @{1,address@hidden; i2 = "fd"; i3 = @address@hidden; i4 = "b";
## oo(address@hidden:@}).(i2)(address@hidden:@}).(i4) == 6;
## @end group
## @end example
## @seealso{getfield, rmfield, isfield, isstruct, fieldnames, struct}
## @end deftypefn

## Author:  Etienne Grossmann <address@hidden>

function obj = setfield (obj, varargin)
   val = varargin{nargin-1};
	 if length(val > 0)
     field = 'obj';
     for i = 1:nargin-2
       v = varargin{i};
       if (iscell (v))
         sep = '(';
         for j = 1:length (v)
           % surround with [] to allow for array slicing
           % linearize and transpose to ensure slicing index is a row array
           % int2str processes a row array by inserting space between elements
           % (int2str processes a column array by processing each row independently,
           %  which produces the undesired effect)
           field = [field, sep, '[', int2str(v{j}(:)'), ']'];
           sep = ',';
         endfor
         field = [field, ')'];
       else
         field = [field, '.', v];
       endif
     endfor
     eval (sprintf ('%s=val;', field));
   endif
endfunction

%!test
%! x.a = "hello";
%! x = setfield(x,"b","world");
%! y = struct("a","hello","b","world");
%! assert(x,y);
%!test
%! oo(1,1).f0= 1;
%! oo = setfield(oo,{1,2},"fd",{3},"b", 6);
%! assert (oo(1,2).fd(3).b, 6)
%!test
%! a.b = "b"
%! a = setfield(a, "a", {1:5}, 10);
%! assert(a.a, [10 10 10 10 10])