(******************************************************************************)

(*  ocaml-fileutils: files and filenames common operations                    *)

(*                                                                            *)

(*  Copyright (C) 2003-2014, Sylvain Le Gall                                  *)

(*                                                                            *)

(*  This library is free software; you can redistribute it and/or modify it   *)

(*  under the terms of the GNU Lesser General Public License as published by  *)

(*  the Free Software Foundation; either version 2.1 of the License, or (at   *)

(*  your option) any later version, with the OCaml static compilation         *)

(*  exception.                                                                *)

(*                                                                            *)

(*  This library 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 file         *)

(*  COPYING for more details.                                                 *)

(*                                                                            *)

(*  You should have received a copy of the GNU Lesser General Public License  *)

(*  along with this library; if not, write to the Free Software Foundation,   *)

(*  Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA             *)

(******************************************************************************)

open FilePath_type

include CommonPath

let rec dir_writer lst =

  match lst with

    Root s :: tl -> (s^":\\")^(dir_writer tl)

  | [ CurrentDir Short ] -> ""

  | lst ->

    let dir_writer_aux cmp =

      match cmp with

      (* We should raise an exception here *)

        Root s -> s

      | ParentDir -> ".."

      | CurrentDir _ -> "."

      | Component s -> s

    in

    String.concat "\\" (List.map dir_writer_aux lst)

let dir_reader str =

  let fn_part_of_string =

    function

    | ".." -> ParentDir

    | "."  -> CurrentDir Long

    | str  -> Component str

  in

  let fn_part_split str =

    let lst =

      List.flatten

        (List.map

           (StringExt.split ~map:fn_part_of_string '\\')

           (StringExt.split ~map:(fun s -> s) '/' str))

    in

    match lst with

    (* TODO: we don't make the difference between c:a and c:\a *)

    | Component "" :: tl -> tl

    | lst -> lst

  in

  try

    let drive_letter, str = StringExt.break_at_first ':' str in

    Root drive_letter :: (fn_part_split str)

  with Not_found ->

    fn_part_split str

let path_writer lst = String.concat ";" lst

let path_reader str = StringExt.split ~map:(fun s -> s) ';' str