function auxURL=amt_auxdataurl(newURL)
%AMT_AUXDATAURL URL of the auxiliary data
%   Usage: url=amt_auxdataurl
%          amt_auxdataurl(newurl)
%
%   url=AMT_AUXDATAURL returns the URL of the web address containing
%   auxiliary data.
% 
%   AMT_AUXDATAURL(newurl) sets the URL of the web address for further calls
%   of AMT_AUXDATAURL.
%
%   See also: amt_auxdatapath amt_load
%
%   Url: http://amtoolbox.org/amt-1.2.0/doc/core/amt_auxdataurl.php

% Copyright (C) 2009-2022 Piotr Majdak, Clara Hollomey, and the AMT team.
% This file is part of Auditory Modeling Toolbox (AMT) version 1.2.0
%
% 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/>.

%   #Author: Piotr Majdak, 2015
mlock;
persistent AuxDataURL;
caller = dbstack;
last = numel(caller);

[~, kv] = amt_configuration;

if exist('newURL','var')
  AuxDataURL=newURL;
elseif isempty(AuxDataURL)
  AuxDataURL = kv.auxdataURL;
end
auxURL=AuxDataURL;

if ~strcmp('amt_configuration', caller(last).name)
  amt_configuration('auxdataURL', auxURL);
end