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/* -*- mode: objc; coding: utf-8 -*- */
/* Copyright 2008, Matthias Benkard. */
#import "MLKLinkedList.h"
#import "MLKCons.h"
@implementation MLKLinkedList
-(MLKLinkedList*) init
{
_firstCons = nil;
return self;
}
-(MLKLinkedList*) initWithCons:(MLKCons*)cons
{
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
@end
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