NORMALIZE remove redundant elements of path

normalize(p) remove redundant elements of path p path need not exist, normalized path is returned

Contents

Inputs

Outputs

function n = normalize(p, use_java)
arguments
  p (1,1) string
  use_java (1,1) logical = false
end

if use_java
  n = stdlib.posix(java.io.File(p).toPath().normalize());
else

  n = stdlib.posix(p);

  % use split to remove /../ and /./ and duplicated /
  parts = split(n, "/");
  i0 = 1;
  if startsWith(n, "/")
    n = "/";
  elseif ispc && strlength(n) >= 2 && isletter(extractBetween(n, 1, 1)) && extractBetween(n, 2, 2) == ":"
    n = parts(1);
    i0 = 2;
  else
    n = "";
  end

  for i = i0:length(parts)
    if parts(i) == ".."
      if n == ""
        n = parts(i);
      elseif endsWith(n, "..")
        n = n + "/" + parts(i);
      else
        j = strfind(n, "/");
        if isempty(j)
          n = "";
        else
          n = extractBefore(n, j(end));
        end
      end
    elseif all(parts(i) ~= [".", ""])
      if n == ""
        n = parts(i);
      elseif n == "/"
        n = n + parts(i);
      else
        n = n + "/" + parts(i);
      end
    end
  end

end

if(strlength(n) == 0), n = "."; end

end

Published with MATLAB® R2024b