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

(*  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 FileUtilTypes

let permission_of_int pr =

  let perm_match oct =

    (pr land oct) <> 0

  in

  {

    user =

      {

        sticky = perm_match 0o4000;

        exec   = perm_match 0o0100;

        write  = perm_match 0o0200;

        read   = perm_match 0o0400;

      };

    group =

      {

        sticky = perm_match 0o2000;

        exec   = perm_match 0o0010;

        write  = perm_match 0o0020;

        read   = perm_match 0o0040;

      };

    other =

      {

        sticky = perm_match 0o1000;

        exec   = perm_match 0o0001;

        write  = perm_match 0o0002;

        read   = perm_match 0o0004;

      };

  }

let int_of_permission pr =

  let permission_int = [

    (pr.user.sticky,  0o4000);

    (pr.user.exec,    0o0100);

    (pr.user.write,   0o0200);

    (pr.user.read,    0o0400);

    (pr.group.sticky, 0o2000);

    (pr.group.exec,   0o0010);

    (pr.group.write,  0o0020);

    (pr.group.read,   0o0040);

    (pr.other.sticky, 0o1000);

    (pr.other.exec,   0o0001);

    (pr.other.write,  0o0002);

    (pr.other.read,   0o0004)

  ]

  in

  List.fold_left (fun full_perm (b, perm) ->

    if b then

      perm lor full_perm

    else

      full_perm)

    0o0000 permission_int