dynare/matlab/missing/isfile/isfile.m

88 lines
2.1 KiB
Matlab

function a = isfile(b)
%@info:
%! @deftypefn {Function File} {@var{a} =} isfile (@var{b})
%! @anchor{isfile}
%! @sp 1
%! Test if @var{b} is a file.
%! @sp 2
%! @strong{Inputs}
%! @sp 1
%! @table @var
%! @item b
%! A matlab/octave string.
%! @end table
%! @sp 2
%! @strong{Outputs}
%! @sp 1
%! @table @var
%! @item a
%! Integer scalar, equal to 1 if @var{b} is a file, zero otherwise.
%! @end table
%! @sp 2
%! @strong{This function is called by:}
%! @sp 2
%! @strong{This function calls:}
%! @sp 2
%! @end deftypefn
%@eod:
% Copyright © 2012-2017 Dynare Team
%
% This file is part of Dynare.
%
% Dynare 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.
%
% Dynare 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 Dynare. If not, see <https://www.gnu.org/licenses/>.
stringarrayflag = false;
cellofstringflag = false;
n = 1;
a = false;
if ~isoctave() && ~matlab_ver_less_than('9.1') && isstring(b) && length(b)>1 && isvector(b)
n = length(b);
stringarrayflag = true;
a = false(size(b));
end
if iscell(b) && length(b)>1 && isvector(b)
if all(cellfun(@ischar, b))
n = length(b);
cellofstringflag = true;
a = false(size(b));
else
error('Wrong input argument type!')
end
end
for i=1:n
if stringarrayflag
d = b(i);
elseif cellofstringflag
d = b{i};
elseif ischar(b) && size(b, 1)==1
d = b;
else
error('Wrong input argument type!')
end
[base, ext] = strtok(d, '.');
if isempty(ext)
% File has no extension.
[status, c] = fileattrib(d);
if status
a(i) = ~c.directory;
end
else
a(i) = isequal(exist(d, 'file'), 2);
end
end