UNSAFE MODULE EnvVar_ux EXPORTS EnvVar;

(***************************************************************************)
(*                      Copyright (C) Olivetti 1989                        *)
(*                          All Rights reserved                            *)
(*                                                                         *)
(* Use and copy of this software and preparation of derivative works based *)
(* upon this software are permitted to any person, provided this same      *)
(* copyright notice and the following Olivetti warranty disclaimer are     *) 
(* included in any copy of the software or any modification thereof or     *)
(* derivative work therefrom made by any person.                           *)
(*                                                                         *)
(* This software is made available AS IS and Olivetti disclaims all        *)
(* warranties with respect to this software, whether expressed or implied  *)
(* under any law, including all implied warranties of merchantibility and  *)
(* fitness for any purpose. In no event shall Olivetti be liable for any   *)
(* damages whatsoever resulting from loss of use, data or profits or       *)
(* otherwise arising out of or in connection with the use or performance   *)
(* of this software.                                                       *)
(***************************************************************************)

IMPORT M3toC, Text, Cstdlib;

(*PUBLIC*)
PROCEDURE Get(e: Text.T; VAR res: Text.T): BOOLEAN RAISES {} =
(* If e is an environment variable, res is set to its value, and TRUE is
 * returned.  If e is not an environment variable, res is unchanged, and
 * FALSE is returned.
 *)
  VAR
    cRes := Cstdlib.getenv(M3toC.TtoS(e));
  BEGIN
    IF cRes = NIL THEN RETURN FALSE;
    ELSE res := M3toC.CopyStoT(cRes); RETURN TRUE;
    END;
  END Get;

BEGIN
END EnvVar_ux.