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52f6bc90ae
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@3496 72102866-910b-0410-8b05-ffd578937521
66 lines
1.6 KiB
Objective-C
66 lines
1.6 KiB
Objective-C
/* Implementation for Objective-C Stack object
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Copyright (C) 1993, 1994, 1996 Free Software Foundation, Inc.
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Written by: Andrew Kachites McCallum <mccallum@gnu.ai.mit.edu>
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Created: May 1993
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This file is part of the GNUstep Base Library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <config.h>
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#include <base/Stack.h>
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#include <base/ArrayPrivate.h>
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@implementation Stack
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- (void) pushObject: newObject
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{
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[self appendObject: newObject];
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}
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/* Overriding */
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- (void) addObject: newObject
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{
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[self pushObject: newObject];
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}
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- popObject
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{
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id ret;
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ret = [[self lastObject] retain];
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[self removeLastObject];
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return [ret autorelease];
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}
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- topObject
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{
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return [self lastObject];
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}
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/* xxx Yipes. What copying semantics do we want here? */
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- (void) duplicateTop
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{
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[self pushObject: [self topObject]];
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}
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- (void) exchangeTop
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{
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if (_count > 1)
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[self swapAtIndeces:_count-1 :_count-2];
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}
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@end
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