/*********************************************************************
* Copyright (C) 2000 by Progress Software Corporation ("PSC"),       *
* 14 Oak Park, Bedford, MA 01730, and other contributors as listed   *
* below.  All Rights Reserved.                                       *
*                                                                    *
* The Initial Developer of the Original Code is PSC.  The Original   *
* Code is Progress IDE code released to open source December 1, 2000.*
*                                                                    *
* The contents of this file are subject to the Possenet Public       *
* License Version 1.0 (the "License"); you may not use this file     *
* except in compliance with the License.  A copy of the License is   *
* available as of the date of this notice at                         *
* http://www.possenet.org/license.html                               *
*                                                                    *
* Software distributed under the License is distributed on an "AS IS"*
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. You*
* should refer to the License for the specific language governing    *
* rights and limitations under the License.                          *
*                                                                    *
* Contributors:                                                      *
*                                                                    *
*********************************************************************/
/*
* i-file
*
*    Returns read write information on the file or the directory
*    the file is in, if the file can't be found.
*/

DEFINE INPUT  PARAMETER fName    AS CHARACTER NO-UNDO.
DEFINE OUTPUT PARAMETER readable AS LOGICAL   NO-UNDO INITIAL ?.
DEFINE OUTPUT PARAMETER writable AS LOGICAL   NO-UNDO INITIAL ?.
DEFINE OUTPUT PARAMETER fFound   AS LOGICAL   NO-UNDO INITIAL TRUE.

DEFINE VARIABLE slash AS CHARACTER NO-UNDO.

&IF "{&WINDOW-SYSTEM}" BEGINS "MS-WIN" &THEN
slash = "~\".
&ELSE
slash = ~"/".
&ENDIF

/*
* Get the OS level information about the file. We need to know if the
* user can read or write the file. Also, we need to know if there is a
* file out there. The user may be trying to create a new file a
* file.
*/
ASSIGN
  FILE-INFO:FILE-NAME = fName
  writable            = (INDEX(FILE-INFO:FILE-TYPE, "W":u) > 1)
  readable            = (INDEX(FILE-INFO:FILE-TYPE, "R":u) > 1)
  .

IF writable = ? THEN DO:
  /*
  * The file doesn't exist. Let's try to figure out if the user
  * can write out the file. If we only have a file name then check to
  * see if we can write in the current directory.
  */
  IF NUM-ENTRIES(fName, slash) = 1 THEN fName = ".":u.

  ASSIGN
    fFound              = FALSE
    FILE-INFO:FILE-NAME = SUBSTRING(fName,1,R-INDEX(fName, slash) - 1,
                            "CHARACTER":u)
    writable            = (INDEX(FILE-INFO:FILE-TYPE, "W":u) > 1)
    readable            = (INDEX(FILE-INFO:FILE-type, "R":u) > 1)
    .

  /* If we can't write to the directory then let the app know.  */
  IF writable = ? THEN writable = FALSE.
  IF readable = ? THEN readable = FALSE.
END.

/* _ifile.p - end of file */