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/* -*- mode: objc; coding: utf-8 -*- */
/* Étoilisp/Mulklisp, a Common Lisp subset for the Étoilé runtime.
* Copyright (C) 2008 Matthias Andreas Benkard.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#import "MLKLinkedList.h"
#import "MLKCons.h"
@implementation MLKLinkedList
-(MLKLinkedList*) init
{
self = [super init];
_firstCons = nil;
return self;
}
-(MLKLinkedList*) initWithCons:(MLKCons*)cons
{
self = [super init];
ASSIGN (_firstCons, cons);
return self;
}
-(void) push: (id)object
{
ASSIGN (_firstCons, [MLKCons cons:object with:_firstCons]);
}
-(id) pop
{
id retval = [_firstCons car];
RETAIN (retval);
ASSIGN (_firstCons, [_firstCons cdr]);
AUTORELEASE (retval);
return retval;
}
-(MLKCons*) firstCons
{
return _firstCons;
}
-(BOOL) null
{
return !_firstCons;
}
#ifdef __OBJC2__
-(NSUInteger) countByEnumeratingWithState:(NSFastEnumerationState *)state objects:(id *)stackbuf count:(NSUInteger)len
{
if (state->state == 0)
{
state->mutationsPtr = &_firstCons;
state->extra[0] = (unsigned long) &_firstCons;
}
MLKCons *currentCons = (MLKCons*) state->extra[0];
if (currentCons)
{
state->itemsPtr = [currentCons car];
return 1;
}
else
return 0;
}
#endif
-(void) dealloc
{
RELEASE (_firstCons);
[super dealloc];
}
@end
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