Line data    Source code

       1           0 : //
       2             : // $Id: Comparison.m,v 1.3 2004/11/29 23:35:50 will_mason Exp $
       3             : //
       4             : // vi: set ft=objc:
       5             : 
       6             : /*
       7             :  * ObjectiveLib - a library of containers and algorithms for Objective-C
       8             :  *
       9             :  * Copyright (c) 2004
      10             :  * Will Mason
      11             :  *
      12             :  * Portions:
      13             :  *
      14             :  * Copyright (c) 1994
      15             :  * Hewlett-Packard Company
      16             :  *
      17             :  * Copyright (c) 1996,1997
      18             :  * Silicon Graphics Computer Systems, Inc.
      19             :  *
      20             :  * Copyright (c) 1997
      21             :  * Moscow Center for SPARC Technology
      22             :  *
      23             :  * Copyright (c) 1999 
      24             :  * Boris Fomitchev
      25             :  *
      26             :  * This library is free software; you can redistribute it and/or
      27             :  * modify it under the terms of the GNU Lesser General Public
      28             :  * License as published by the Free Software Foundation; either
      29             :  * version 2.1 of the License, or (at your option) any later version.
      30             :  *
      31             :  * This library is distributed in the hope that it will be useful,
      32             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      33             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      34             :  * Lesser General Public License for more details.
      35             :  *
      36             :  * You should have received a copy of the GNU Lesser General Public
      37             :  * License along with this library; if not, write to the Free Software
      38             :  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
      39             :  *
      40             :  * You may contact the author at will_mason@users.sourceforge.net.
      41             :  */
      42             : 
      43             : #if defined(GNUSTEP)
      44             : 
      45             : #include "Comparison.h"
      46             : #include <Foundation/NSString.h>
      47             : 
      48             : @implementation NSObject (OLComparison)
      49             : 
      50             : - (BOOL) isEqualTo: (id)object
      51             : {
      52             :     return (object != nil && [self compare: object] == NSOrderedSame) ?
      53             :         YES : NO;
      54             : }
      55             : 
      56             : - (BOOL) isGreaterThan: (id)object
      57             : {
      58             :     return (object != nil && [self compare: object] == NSOrderedDescending) ?
      59             :         YES : NO;
      60             : }
      61             : 
      62             : - (BOOL) isGreaterThanOrEqualTo: (id)object
      63             : {
      64             :     return (object != nil && [self compare: object] != NSOrderedAscending) ?
      65             :         YES : NO;
      66             : }
      67             : 
      68             : - (BOOL) isLessThan: (id)object
      69             : {
      70             :     return (object != nil && [self compare: object] == NSOrderedAscending) ?
      71             :         YES : NO;
      72             : }
      73             : 
      74             : - (BOOL) isLessThanOrEqualTo: (id)object
      75             : {
      76             :     return (object != nil && [self compare: object] != NSOrderedDescending) ?
      77             :         YES : NO;
      78             : }
      79             : 
      80             : - (BOOL) isNotEqualTo: (id)object
      81             : {
      82             :     return (object != nil && [self compare: object] != NSOrderedSame) ?
      83             :         YES : NO;
      84             : }
      85             : 
      86             : @end
      87             : 
      88             : #endif