function test_failed = test_libltfat_ifftshift(varargin)
test_failed = 0;

fprintf(' ===============  %s ================ \n',upper(mfilename));

definput.flags.complexity={'double','single'};
[flags]=ltfatarghelper({},definput,varargin);
dataPtr = [flags.complexity, 'Ptr'];

Larr = [1,9,11,110];

for do_complex = 0:1
    complexstring = '';
    if do_complex, complexstring = 'complex'; end
    funname = makelibraryname('ifftshift',flags.complexity,do_complex);
    
    for L = Larr
            
            if do_complex
                z = cast((1:L)'+1i*(L:-1:1)',flags.complexity);
                zi = complex2interleaved(z);
                zout = randn(size(zi),flags.complexity);
                
                ziPtr = libpointer(dataPtr,zi);
                zoutPtr = libpointer(dataPtr,zout);
            else
                z = cast((1:L)',flags.complexity);
                zi = z;
                zout = randn(size(zi),flags.complexity);
                
                ziPtr = libpointer(dataPtr,zi);
                zoutPtr = libpointer(dataPtr,zout);
            end
            
            trueres = ifftshift(z);
            
            
            status = calllib('libltfat',funname,ziPtr,L,zoutPtr);
            
            if do_complex
                res = norm(trueres - interleaved2complex(zoutPtr.Value));
            else
                res = norm(trueres - zoutPtr.Value);
            end
            
            [test_failed,fail]=ltfatdiditfail(res+status,test_failed,0);
            fprintf(['FFTSHIFT OP L:%3i, %s %s %s %s\n'],L,flags.complexity,complexstring,ltfatstatusstring(status),fail);
            
            status = calllib('libltfat',funname,ziPtr,L,ziPtr);
            
            if do_complex
                res = norm(trueres - interleaved2complex(ziPtr.Value));
            else
                res = norm(trueres - ziPtr.Value);
            end
            
            [test_failed,fail]=ltfatdiditfail(res+status,test_failed,0);
            fprintf(['FFTSHIFT IP L:%3i, %s %s %s %s\n'],L,flags.complexity,complexstring,ltfatstatusstring(status),fail);
    end
end


%-*- texinfo -*-
%@deftypefn {Function} test_libltfat_ifftshift
%@verbatim
%@end verbatim
%@strong{Url}: @url{http://ltfat.github.io/doc/libltfat/modules/libltfat/testing/mUnit/test_libltfat_ifftshift.html}
%@end deftypefn

% Copyright (C) 2005-2016 Peter L. Soendergaard <peter@sonderport.dk>.
% This file is part of LTFAT version 2.3.1
%
% 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 3 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, see <http://www.gnu.org/licenses/>.

