(* Copyright 1996-2003 John D. Polstra.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgment:
 *      This product includes software developed by John D. Polstra.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $Id: FileInfo.m3,v 1.14 2003/03/04 19:26:15 jdp Exp $ *)

MODULE FileInfo;

IMPORT SupMisc, Text;

VAR (*CONST*)
  HugeText := Text.FromChars( ARRAY [0..15] OF CHAR{ LAST(CHAR), .. } );
(* Assumed to compare greater than any pathname component we might encounter. *)

PROCEDURE Compare(a, b: T): [-1..1] =
  VAR
    aName := a.name;
    bName := b.name;
  BEGIN
    IF a.type = Type.DirUp THEN
      aName := SupMisc.CatPath(aName, HugeText);
    END;
    IF b.type = Type.DirUp THEN
      bName := SupMisc.CatPath(bName, HugeText);
    END;
    RETURN SupMisc.PathCompare(aName, bName);
  END Compare;

PROCEDURE Equal(a, b: T): BOOLEAN =
  BEGIN
    RETURN Text.Equal(a.name, b.name)
      AND (a.type = Type.DirUp) = (b.type = Type.DirUp);
  END Equal;

PROCEDURE IsDir(fi: T): BOOLEAN =
  BEGIN
    RETURN fi.type = Type.DirDown OR fi.type = Type.DirUp;
  END IsDir;

BEGIN
END FileInfo.