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function [spec, headerinfo] = read_caret_spec(specfile)
% READ_CARET_SPEC reads in a caret .spec file.
%
% Use as
% [spec, headerinfo] = read_caret_spec(specfile)
%
% Output arguments:
% spec = structure containing per file type the files listed
% headerinfo = structure containing the specfile header
%
% The file can be an xml-file or an ascii formatted file
% Copyright (C) 2013, Jan-Mathijs Schoffelen
try,
% read xml-file that contains a description to a bunch of files
% belonging together
ft_hastoolbox('gifti', 1);
g = xmltree(specfile);
% convert into a structure
s = convert(g);
if isfield(s, 'FileHeader')
headerinfo = s.FileHeader;
spec = rmfield(s, 'FileHeader');
else
headerinfo = [];
spec = s;
end
% process the headerinfo
if ~isempty(headerinfo)
if isfield(headerinfo, 'Element')
tmp = headerinfo.Element;
tmp2 = struct([]);
for k = 1:numel(headerinfo.Element)
tmp2(1).(strrep(headerinfo.Element{k}.Name, '-', '_')) = headerinfo.Element{k}.Value;
end
headerinfo = tmp2;
end
end
% further process the fields in spec
f = fieldnames(spec);
for k = 1:numel(f)
if isempty(strfind(f{k}, 'study_metadata'))
if iscell(spec.(f{k}))
tmp = spec.(f{k});
tmp2 = {};
for m = 1:numel(tmp)
tmpx = tmp{m};
if isstruct(tmpx)
fn = fieldnames(tmpx)
for i = 1:numel(fn)
tmp2{end+1,1} = tmpx.(fn{i});
end
end
end
spec.(f{k}) = tmp2;
elseif isstruct(spec.(f{k}))
tmp = spec.(f{k});
fn = fieldnames(tmp);
tmp2 = {};
for m = 1:numel(fn)
tmp2{end+1,1} = tmp.(fn{m});
end
spec.(f{k}) = tmp2;
else
% don't know what to do with it
spec = rmfield(spec, f{k});
end
else
% don't know what to do with it
spec = rmfield(spec, f{k});
end
end
catch
% process as ASCII-file
fid = fopen(specfile);
line = 'some text';
while isempty(strfind(line, 'EndHeader'))
line = fgetl(fid);
if isempty(strfind(line, 'BeginHeader')) && isempty(strfind(line, 'EndHeader'))
tok = tokenize(line, ' ');
headerinfo.(strrep(tok{1},'-','_')) = tok{2};
end
end
line = fgetl(fid); % empty line
spec = struct([]);
while 1
line = fgetl(fid);
if ~ischar(line), break, end
tok = tokenize(line, ' ');
if ~isempty(tok{1})
if isfield(spec, tok{1})
spec(1).(tok{1}){end+1,1} = tok{2};
else
spec(1).(tok{1}){1} = tok{2};
end
end
end
fclose(fid);
end
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