ObjFW  Artifact [b3acc69d72]

Artifact b3acc69d72310074a6351b49ba205138b57786a2749ebaad58d70ad7bfed4b15:

• File src/OFNull.m — part of check-in [13ee56edf3] at 2014-06-21 21:43:43 on branch trunk — Move all macros from OFObject.h to macros.h

  This means that OFObject.h imports macros.h now, making it unnecessary
  to manually import macros.h in almost every file. And while at it, also
  import autorelease.h in OFObject.h, so that this doesn't need to be
  manually imported in almost every file as well. (user: js, size: 2491) [annotate] [blame] [check-ins using]

/*
 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014
 *   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"

#import "OFNull.h"
#import "OFString.h"
#import "OFXMLElement.h"
#import "OFDataArray.h"

#import "OFInvalidArgumentException.h"

@interface OFNull (OF_PRIVATE_CATEGORY)
- (OFString*)OF_JSONRepresentationWithOptions: (int)options
					depth: (size_t)depth;
@end

static OFNull *null = nil;

@implementation OFNull
+ (void)initialize
{
	null = [[self alloc] init];
}

+ (OFNull*)null
{
	return null;
}

- initWithSerialization: (OFXMLElement*)element
{
	void *pool;

	[self release];

	pool = objc_autoreleasePoolPush();

	if (![[element name] isEqual: [self className]] ||
	    ![[element namespace] isEqual: OF_SERIALIZATION_NS])
		@throw [OFInvalidArgumentException exception];

	objc_autoreleasePoolPop(pool);

	return [OFNull null];
}

- (OFString*)description
{
	return @"<null>";
}

- copy
{
	return self;
}

- (OFXMLElement*)XMLElementBySerializing
{
	void *pool = objc_autoreleasePoolPush();
	OFXMLElement *element;

	element = [OFXMLElement elementWithName: [self className]
				      namespace: OF_SERIALIZATION_NS];

	[element retain];

	objc_autoreleasePoolPop(pool);

	return [element autorelease];
}

- (OFString*)JSONRepresentation
{
	return [self OF_JSONRepresentationWithOptions: 0
						depth: 0];
}

- (OFString*)JSONRepresentationWithOptions: (int)options
{
	return [self OF_JSONRepresentationWithOptions: options
						depth: 0];
}

- (OFString*)OF_JSONRepresentationWithOptions: (int)options
					depth: (size_t)depth
{
	return @"null";
}

- (OFDataArray*)messagePackRepresentation
{
	OFDataArray *data = [OFDataArray dataArrayWithItemSize: 1
						      capacity: 1];
	uint8_t type = 0xC0;

	[data addItem: &type];

	return data;
}

- autorelease
{
	return self;
}

- retain
{
	return self;
}

- (void)release
{
}

- (unsigned int)retainCount
{
	return OF_RETAIN_COUNT_MAX;
}

- (void)dealloc
{
	OF_UNRECOGNIZED_SELECTOR

	/* Get rid of a stupid warning */
	[super dealloc];
}
@end