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: fiff_read_ctf_comp.m
    path of file: ./repos/fieldtrip/external/mne
    
    the code of the file until where you have to start completion: function [ compdata ] = fiff_read_ctf_comp(fid,node,chs,ch_rename)

%
% [ compdata ] = fiff_read_ctf_comp(fid,node,chs,ch_rename)
%
% Read the CTF software compensation data from the given node
%


%
%   Author : Matti Hamalainen, MGH Martinos Center
%   License : BSD 3-clause
%
%
%   Revision 1.8  2007/11/13 10:55:32  msh
%   Specify the second argument to all calls to the exist function
%
%   Revision 1.7  2006/09/25 19:48:16  msh
%   Added projection item kinds to fiff_define_constants
%   Changed some fields to int32 in surface structures
%
%   Revision 1.6  2006/08/09 15:22:51  msh
%   Removed debug printout.
%
%   Revision 1.5  2006/06/22 21:22:46  msh
%   Take into account the possibility of calibrated compensation matrices
%
%   Revision 1.4  2006/04/23 15:29:40  msh
%   Added MGH to the copyright
%

    
function [ compdata ] = fiff_read_ctf_comp(fid,node,chs,ch_rename)

%
% [ compdata ] = fiff_read_ctf_comp(fid,node,chs,ch_rename)
%
% Read the CTF software compensation data from the given node
%


%
%   Author : Matti Hamalainen, MGH Martinos Center
%   License : BSD 3-clause
%
%
%   Revision 1.8  2007/11/13 10:55:32  msh
%   Specify the second argument to all calls to the exist function
%
%   Revision 1.7  2006/09/25 19:48:16  msh
%   Added projection item kinds to fiff_define_constants
%   Changed some fields to int32 in surface structures
%
%   Revision 1.6  2006/08/09 15:22:51  msh
%   Removed debug printout.
%
%   Revision 1.5  2006/06/22 21:22:46  msh
%   Take into account the possibility of calibrated compensation matrices
%
%   Revision 1.4  2006/04/23 15:29:40  msh
%   Added MGH to the copyright
%
%   Revision 1.3  2006/04/18 20:44:46  msh
%   Added reading of forward solution.
%   Use length instead of size when appropriate
%
%   Revision 1.2  2006/04/12 10:29:02  msh
%   Made evoked data writing compatible with the structures returned in reading.
%
%   Revision 1.1  2006/04/10 23:26:54  msh
%   Added fiff reading routines
%
%

global FIFF;
if isempty(FIFF)
    FIFF = fiff_define_constants();
end