fwrite3.m

function fwrite3(fid, val)


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% fwrite3.m
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% Original Author: Bruce Fischl
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% Copyright © 2021 The General Hospital Corporation (Boston, MA) "MGH"
%
% Terms and conditions for use, reproduction, distribution and contribution
% are found in the 'FreeSurfer Software License Agreement' contained
% in the file 'LICENSE' found in the FreeSurfer distribution, and here:
%
% https://surfer.nmr.mgh.harvard.edu/fswiki/FreeSurferSoftwareLicense
%
% Reporting: freesurfer@nmr.mgh.harvard.edu
%

% write a 3 byte integer out of a file
%fwrite(fid, val, '3*uchar') ;
b1 = bitand(bitshift(val, -16), 255) ;
b2 = bitand(bitshift(val, -8), 255) ;
b3 = bitand(val, 255) ; 
fwrite(fid, b1, 'uchar') ;
fwrite(fid, b2, 'uchar') ;
fwrite(fid, b3, 'uchar') ;