/*
 * Copyright (c) 2008, 2009, 2010, 2011
 *   Jonathan Schleifer <js@webkeks.org>
 *
 * All rights reserved.
 *
 * This file is part of ObjFW. It may be distributed under the terms of the
 * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
 * the packaging of this file.
 *
 * Alternatively, it may be distributed under the terms of the GNU General
 * Public License, either version 2 or 3, which can be found in the file
 * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
 * file.
 */

#include "config.h"

#define OF_MUTABLE_SET_M

#import "OFMutableSet.h"
#import "OFDictionary.h"
#import "OFNull.h"
#import "OFAutoreleasePool.h"

@implementation OFMutableSet
- (void)addObject: (id)object
{
	[dictionary _setObject: [OFNull null]
			forKey: object
		       copyKey: NO];

	mutations++;
}

- (void)removeObject: (id)object
{
	[dictionary removeObjectForKey: object];

	mutations++;
}

- (int)countByEnumeratingWithState: (of_fast_enumeration_state_t*)state
			   objects: (id*)objects
			     count: (int)count
{
	OFAutoreleasePool *pool = state->extra.pointers[0];
	OFEnumerator *enumerator = state->extra.pointers[1];
	int i;

	state->itemsPtr = objects;
	state->mutationsPtr = &mutations;

	if (state->state == -1)
		return 0;

	if (state->state == 0) {
		pool = [[OFAutoreleasePool alloc] init];
		enumerator = [dictionary keyEnumerator];

		state->extra.pointers[0] = pool;
		state->extra.pointers[1] = enumerator;

		state->state = 1;
	}

	for (i = 0; i < count; i++) {
		id object = [enumerator nextObject];

		if (object == nil) {
			[pool release];
			state->state = -1;
			return i;
		}

		objects[i] = object;
	}

	return count;
}
@end