You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: loadubjson.m
    path of file: ./repos/Coding-Guide/Notes/ml/coursera/machine-learning-ex3/ex3/lib/jsonlab
    
    the code of the file until where you have to start completion: function data = loadubjson(fname,varargin)
%
% data=loadubjson(fname,opt)
%    or
% data=l
    
function is part of JSONLab toolbox (http://iso2mesh.sf.net/cgi-bin/index.cgi?jsonlab)
%

global pos inStr len  esc index_esc len_esc isoct arraytoken fileendian systemendian

if(regexp(fname,'[\{\}\]\[]','once'))
   string=fname;
elseif(exist(fname,'file'))
   fid = fopen(fname,'rb');
   string = fread(fid,inf,'uint8=>char')';
   fclose(fid);
else
   error('input file does not exist');
end