function [retval] = getbatch

% GETBATCH returns a number that can be used to distinguish the subsequent
% batches. The number automatically increases over subsequent calls.

% Copyright (C) 2011-2012, Robert Oostenveld
%
% This file is part of FieldTrip, see http://www.ru.nl/neuroimaging/fieldtrip
% for the documentation and details.
%
%    FieldTrip 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.
%
%    FieldTrip 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 FieldTrip. If not, see <http://www.gnu.org/licenses/>.
%
% $Id: getbatch.m 8776 2013-11-14 09:04:48Z roboos $

persistent batch
if isempty(batch)
  batch = 0;
end
batch = batch + 1;
retval = batch;

