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function [relpath pathstring] = find_relative_path(path_1,path_2)
% Outputs the relative path from path_2 to path_1
% So that path_1 = [path_2 filesep relative_path]
% If they are the same, there is no change.
if strcmp(path_1,path_2)
relpath=cell(0);
pathstring=path_1;
return;
end
% The paths must be on the same drive/mount path
x=filesep;
if x=='\'
x='\\';
end
Current=textscan(path_1,'%s','Delimiter',x);
Current=Current{1};
Path1=Current;
Current=textscan(path_2,'%s','Delimiter',x);
Current=Current{1};
Path2=Current;
for u=1:length(Path2)
if u>length(Path1) || ~strcmp(Path1{u},Path2{u})
break;
end
end
paths_diverge_at=u;
if paths_diverge_at==1
error('Paths must contain at least one common directory.');
end
relpath=cell(0);
for u=length(Path2):-1:paths_diverge_at
relpath{end+1}='..';
end
for u=paths_diverge_at:length(Path1)
relpath{end+1}=Path1{u};
end
pathstring='';
start_from=1;
tmpath=cd;
for u=1:length(relpath)
pathstring=[pathstring filesep relpath{u}];
cd([path_2 filesep pathstring]);
if strcmp(cd,path_2)
start_from=u+1;
end
end
if start_from<=length(relpath)
relpath={relpath{start_from:end}};
else
relpath=cell(0);
end
cd(tmpath);
end |