gdfclose.m

matlab下实现

function [status,EDF]=gdfclose(EDF)
% [status,EDF]=gdfclose(EDF)
% Closes an EDF-File 

%	Version 0.44
%	23. Mar.1999
%	Copyright (C) 1997-1999 by Alois Schloegl
%	[e-mail]

% 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 2
% 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, write to the Free Software
% Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

if EDF.FILE.OPEN==2
        if EDF.NRec == -1   % unknown record size, determine correct NRec
                status=fseek(EDF.FILE.FID, 0, 'eof');
                endpos = ftell(EDF.FILE.FID);
                EDF.NRec = floor((endpos - EDF.HeadLen) / EDF.AS.bpb);
        end; 

        fseek(EDF.FILE.FID,236,'bof');
        if strcmp(EDF.VERSION(1:3),'GDF');
                fwrite(EDF.FILE.FID,EDF.NRec,'int64');
        else
                fprintf(EDF.FILE.FID,'%-8i',EDF.NRec);
        end;
end;

EDF.FILE.OPEN=0;
status=fclose(EDF.FILE.FID);

return;