quakeforge/ruamoko/lib/Stack.r

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/*
Stack.r
A general-purpose stack class
Copyright (C) 2003 Jeff Teunissen <deek@quakeforge.net>
This file is part of the Ruamoko Standard Library.
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or (at
your option) any later version.
This library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
$Id$
*/
#include "Object.h"
#include "ListNode.h"
#include "Stack.h"
@implementation Stack
- (void) removeAllObjects
{
while ([self count] > 0)
[self pop];
}
- (void) addObject: (id)anObject
{
local id oldTop = top;
top = [[ListNode alloc] initWithObject: anObject];
[top setNextNode: oldTop];
stackSize++;
}
- (id) pop
{
local id data;
local id oldTop = NIL;
if (!top)
return NIL;
oldTop = top;
top = [top nextNode];
stackSize--;
data = [[oldTop object] retain];
[oldTop release];
return [data autorelease];
}
- (id) peek
{
return [top object];
}
- (integer) count
{
}
@end