ObjFW  Diff

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

#import "OFInvalidArgumentException.h"

@interface OFNull ()
- (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];