ObjFW  Artifact [10a564f1a5]

Artifact 10a564f1a58c91fedfa7a3f5b0e22e585126c972727436cdd1d6a920cee4bb24:

• File src/OFNull.m — part of check-in [3d16a30f41] at 2013-06-22 12:12:36 on branch trunk — Rework exceptions.

  This mostly removes the argument for the class in which the exception
  occurred. As backtraces were recently added for all platforms, the
  passed class does not give any extra information on where the exception
  occurred anymore.

  This also removes a few other arguments which were not too helpful. In
  the past, the idea was to pass as many arguments as possible so that it
  is easier to find the origin of the exception. However, as backtraces
  are a much better way to find the origin, those are not useful anymore
  and just make the exception more cumbersome to use. The rule is now to
  only pass arguments that might help in recovering from the exception or
  provide information that is otherwise not easily accessible. (user: js, size: 2129) [annotate] [blame] [check-ins using]

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

#include <stdlib.h>

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

#import "OFInvalidArgumentException.h"

#import "autorelease.h"

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 @"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
{
	[self doesNotRecognizeSelector: _cmd];
	abort();

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