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: read_sbin_header.m
    path of file: ./repos/fieldtrip/fileio/private
    
    the code of the file until where you have to start completion: function [header_array, CateNames, CatLengths, preBaseline] = read_sbin_header(filename)

% READ_SBIN_HEADER reads the header information from an EGI segmented simple binary format file
%
% Use as
%   [header_array, CateNames, CatLengths, preBaseline] = read_sbin_header(filename)
% with
%   header_array     - differs between versions, read code for details
%   CateNames        - category names
%   CatLengths       - length of category names
%   preBaseline      - number of samples in the baseline prior to the baseline event
% and
%   filename    - the name of the data file
%
% Since there is no unique event code for the segmentation event, and hence the baseline period,

    
function [header_array, CateNames, CatLengths, preBaseline] = read_sbin_header(filename)

% READ_SBIN_HEADER reads the header information from an EGI segmented simple binary format file
%
% Use as
%   [header_array, CateNames, CatLengths, preBaseline] = read_sbin_header(filename)
% with
%   header_array     - differs between versions, read code for details
%   CateNames        - category names
%   CatLengths       - length of category names
%   preBaseline      - number of samples in the baseline prior to the baseline event
% and
%   filename    - the name of the data file
%
% Since there is no unique event code for the segmentation event, and hence the baseline period,
% the first event code in the list will be assumed to be the segmentation event.
% NetStation itself simply ignores possible baseline information when importing simple binary files.
%_______________________________________________________________________
%
%
% Modified from EGI's readEGLY.m with permission 2008-03-31 Joseph Dien
%

% This file is part of FieldTrip, see http://www.fieldtriptoolbox.org
% 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/>.
%
% $Id$

fid=fopen_or_error([filename],'r');

version     = fread(fid,1,'int32');
if isempty(version)
    ft_error('ERROR:  This is not a simple binary file.  Note that NetStation does not successfully directly convert EGIS files to simple binary format.');
end