ObjFW  Artifact [d5e3e3b36f]

Artifact d5e3e3b36fc9734160aca1f8946852bf05e9ce8d93b0fc3c4ab061b9a8bec253:

• File src/OFObject.m — part of check-in [f5927f8a84] at 2012-07-14 20:00:11 on branch trunk — New autorelease pools.

  This uses the runtime's autorelease pools and implements autorelease
  pools in the ObjFW runtime. It therefore uses ObjFW's autorelease pools
  when using the ObjFW runtime and Apple's autorelease pools when using
  the Apple runtime.

  These new pools should be ARC-compatible now and finally, it should be
  possible to mix OFAutoreleasePools and NSAutoreleasePools again, even
  @autoreleasepool is allowed in the mix now. This also means the old
  bridge to NSAutoreleasePool should not be required anymore, as both use
  the runtime's autorelease pools now.

  As a bonus, it's significantly faster to use the ObjFW runtime with
  ObjFW's autorelease pools than to use Apple's runtime with Apple's
  autorelease pools, as a quick benchmark using OFXMLParser on large files
  showed. (Note: This is not only due to the different autorelease pools,
  but also due to the fact that even with the same autorelease pools it is
  faster using the ObjFW runtime, as can be seen in versions prior to this
  commit.) (user: js, size: 19973) [annotate] [blame] [check-ins using]

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

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <unistd.h>

#include <assert.h>

#ifdef __QNX__
# include <sys/syspage.h>
#endif

#import "OFObject.h"
#import "OFAutoreleasePool.h"

#import "OFAllocFailedException.h"
#import "OFEnumerationMutationException.h"
#import "OFInitializationFailedException.h"
#import "OFInvalidArgumentException.h"
#import "OFMemoryNotPartOfObjectException.h"
#import "OFNotImplementedException.h"
#import "OFOutOfMemoryException.h"
#import "OFOutOfRangeException.h"

#import "macros.h"

#if defined(OF_APPLE_RUNTIME) && __OBJC2__
# import <objc/objc-exception.h>
#elif defined(OF_OBJFW_RUNTIME)
# import "runtime.h"
#endif

#ifdef _WIN32
# include <windows.h>
#endif

#import "OFString.h"

#if defined(OF_ATOMIC_OPS)
# import "atomic.h"
#elif defined(OF_THREADS)
# import "threading.h"
#endif

struct pre_ivar {
	int32_t retainCount;
	struct pre_mem *firstMem, *lastMem;
#if !defined(OF_ATOMIC_OPS) && defined(OF_THREADS)
	of_spinlock_t retainCountSpinlock;
#endif
};

struct pre_mem {
	struct pre_mem *prev, *next;
	id owner;
};

#define PRE_IVAR_ALIGN ((sizeof(struct pre_ivar) + \
	(__BIGGEST_ALIGNMENT__ - 1)) & ~(__BIGGEST_ALIGNMENT__ - 1))
#define PRE_IVAR ((struct pre_ivar*)(void*)((char*)self - PRE_IVAR_ALIGN))

#define PRE_MEM_ALIGN ((sizeof(struct pre_mem) + \
	(__BIGGEST_ALIGNMENT__ - 1)) & ~(__BIGGEST_ALIGNMENT__ - 1))
#define PRE_MEM(mem) ((struct pre_mem*)(void*)((char*)mem - PRE_MEM_ALIGN))

static struct {
	Class isa;
} alloc_failed_exception;
static Class autoreleasePool = Nil;

static SEL cxx_construct = NULL;
static SEL cxx_destruct = NULL;

size_t of_pagesize;
size_t of_num_cpus;

#ifdef OF_OBJFW_RUNTIME
extern BOOL objc_sync_init();
extern BOOL objc_properties_init();
#endif

#if !defined(OF_APPLE_RUNTIME) || defined(__OBJC2__)
static void
uncaught_exception_handler(id exception)
{
	fprintf(stderr, "\nUnhandled exception:\n%s\n",
	    [[exception description] UTF8String]);
}
#endif

static void
enumeration_mutation_handler(id object)
{
	@throw [OFEnumerationMutationException
	    exceptionWithClass: [object class]
			object: object];
}

#ifndef HAVE_OBJC_ENUMERATIONMUTATION
void
objc_enumerationMutation(id object)
{
	enumeration_mutation_handler(object);
}
#endif

id
of_alloc_object(Class class, size_t extraSize, size_t extraAlignment,
    void **extra)
{
	OFObject *instance;
	size_t instanceSize;

	instanceSize = class_getInstanceSize(class);

	if (OF_UNLIKELY(extraAlignment > 0))
		extraAlignment = ((instanceSize + extraAlignment - 1) &
		    ~(extraAlignment - 1)) - extraAlignment;

	instance = malloc(PRE_IVAR_ALIGN + instanceSize +
	    extraAlignment + extraSize);

	if (OF_UNLIKELY(instance == nil)) {
		object_setClass((id)&alloc_failed_exception,
		    [OFAllocFailedException class]);
		@throw (id)&alloc_failed_exception;
	}

	((struct pre_ivar*)instance)->retainCount = 1;
	((struct pre_ivar*)instance)->firstMem = NULL;
	((struct pre_ivar*)instance)->lastMem = NULL;

#if !defined(OF_ATOMIC_OPS) && defined(OF_THREADS)
	if (OF_UNLIKELY(!of_spinlock_new(
	    &((struct pre_ivar*)instance)->retainCountSpinlock))) {
		free(instance);
		@throw [OFInitializationFailedException
		    exceptionWithClass: class];
	}
#endif

	instance = (OFObject*)((char*)instance + PRE_IVAR_ALIGN);

	memset(instance, 0, instanceSize);
	object_setClass(instance, class);

	if (OF_UNLIKELY(extra != NULL))
		*extra = (char*)instance + instanceSize + extraAlignment;

	return instance;
}

const char*
_NSPrintForDebugger(id object)
{
	return [[object description]
	    cStringWithEncoding: OF_STRING_ENCODING_NATIVE];
}

/* References for static linking */
void _references_to_categories_of_OFObject(void)
{
	_OFObject_Serialization_reference = 1;
}

@implementation OFObject
+ (void)load
{
#ifdef OF_OBJFW_RUNTIME
	if (!objc_sync_init()) {
		fputs("Runtime error: objc_sync_init() failed!\n", stderr);
		abort();
	}

	if (!objc_properties_init()) {
		fputs("Runtime error: objc_properties_init() failed!\n",
		    stderr);
		abort();
	}
#endif

#if !defined(OF_APPLE_RUNTIME) || defined(__OBJC2__)
	objc_setUncaughtExceptionHandler(uncaught_exception_handler);
#endif

#ifdef HAVE_OBJC_ENUMERATIONMUTATION
	objc_setEnumerationMutationHandler(enumeration_mutation_handler);
#endif

	cxx_construct = sel_registerName(".cxx_construct");
	cxx_destruct = sel_registerName(".cxx_destruct");

	if (cxx_construct == NULL || cxx_destruct == NULL) {
		fputs("Runtime error: Failed to register selector "
		    ".cxx_construct and/or .cxx_destruct!\n", stderr);
		abort();
	}

#if defined(_WIN32)
	SYSTEM_INFO si;
	GetSystemInfo(&si);
	of_pagesize = si.dwPageSize;
	of_num_cpus = si.dwNumberOfProcessors;
#elif defined(__QNX__)
	if ((of_pagesize = sysconf(_SC_PAGESIZE)) < 1)
		of_pagesize = 4096;
	of_num_cpus = _syspage_ptr->num_cpu;
#else
# ifdef _SC_PAGESIZE
	if ((of_pagesize = sysconf(_SC_PAGESIZE)) < 1)
# endif
		of_pagesize = 4096;
# ifdef _SC_NPROCESSORS_CONF
	if ((of_num_cpus = sysconf(_SC_NPROCESSORS_CONF)) < 1)
# endif
		of_num_cpus = 1;
#endif
}

+ (void)initialize
{
}

+ alloc
{
	return of_alloc_object(self, 0, 0, NULL);
}

+ new
{
	return [[self alloc] init];
}

+ (Class)class
{
	return self;
}

+ (OFString*)className
{
	return [OFString stringWithCString: class_getName(self)
				  encoding: OF_STRING_ENCODING_ASCII];
}

+ (BOOL)isSubclassOfClass: (Class)class
{
	Class iter;

	for (iter = self; iter != Nil; iter = class_getSuperclass(iter))
		if (iter == class)
			return YES;

	return NO;
}

+ (Class)superclass
{
	return class_getSuperclass(self);
}

+ (BOOL)instancesRespondToSelector: (SEL)selector
{
	return class_respondsToSelector(self, selector);
}

+ (BOOL)conformsToProtocol: (Protocol*)protocol
{
	Class c;

	for (c = self; c != Nil; c = class_getSuperclass(c))
		if (class_conformsToProtocol(c, protocol))
			return YES;

	return NO;
}

+ (IMP)instanceMethodForSelector: (SEL)selector
{
	return class_getMethodImplementation(self, selector);
}

+ (const char*)typeEncodingForInstanceSelector: (SEL)selector
{
#if defined(OF_OBJFW_RUNTIME)
	const char *ret;

	if ((ret = objc_get_type_encoding(self, selector)) == NULL)
		@throw [OFNotImplementedException exceptionWithClass: self
							    selector: selector];

	return ret;
#else
	Method m;
	const char *ret;

	if ((m = class_getInstanceMethod(self, selector)) == NULL ||
	    (ret = method_getTypeEncoding(m)) == NULL)
		@throw [OFNotImplementedException exceptionWithClass: self
							    selector: selector];

	return ret;
#endif
}

+ (OFString*)description
{
	return [self className];
}

+ (IMP)replaceClassMethod: (SEL)selector
      withMethodFromClass: (Class)class
{
	IMP newImp;
	const char *typeEncoding;

	newImp = [class methodForSelector: selector];
	typeEncoding = [class typeEncodingForSelector: selector];

	return [self replaceClassMethod: selector
		     withImplementation: newImp
			   typeEncoding: typeEncoding];
}

+ (IMP)replaceInstanceMethod: (SEL)selector
	 withMethodFromClass: (Class)class
{
	IMP newImp;
	const char *typeEncoding;

	newImp = [class instanceMethodForSelector: selector];
	typeEncoding = [class typeEncodingForInstanceSelector: selector];

	return [self replaceInstanceMethod: selector
			withImplementation: newImp
			      typeEncoding: typeEncoding];
}

+ (IMP)replaceInstanceMethod: (SEL)selector
	  withImplementation: (IMP)implementation
		typeEncoding: (const char*)typeEncoding
{
	return class_replaceMethod(self, selector, implementation,
	    typeEncoding);
}

+ (IMP)replaceClassMethod: (SEL)selector
       withImplementation: (IMP)implementation
	     typeEncoding: (const char*)typeEncoding
{
	return class_replaceMethod(object_getClass(self), selector,
	    implementation, typeEncoding);
}

+ (void)inheritMethodsFromClass: (Class)class
{
	Class superclass = [self superclass];

	if ([self isSubclassOfClass: class])
		return;

#if defined(OF_APPLE_RUNTIME)
	Method *methodList;
	unsigned i, count;

	methodList = class_copyMethodList(object_getClass(class), &count);
	@try {
		for (i = 0; i < count; i++) {
			SEL selector = method_getName(methodList[i]);

			/*
			 * Don't replace methods implemented in receiving class.
			 */
			if ([self methodForSelector: selector] !=
			    [superclass methodForSelector: selector])
				continue;

			[self replaceClassMethod: selector
			     withMethodFromClass: class];
		}
	} @finally {
		free(methodList);
	}

	methodList = class_copyMethodList(class, &count);
	@try {
		for (i = 0; i < count; i++) {
			SEL selector = method_getName(methodList[i]);

			/*
			 * Don't replace methods implemented in receiving class.
			 */
			if ([self instanceMethodForSelector: selector] !=
			    [superclass instanceMethodForSelector: selector])
				continue;

			[self replaceInstanceMethod: selector
				withMethodFromClass: class];
		}
	} @finally {
		free(methodList);
	}
#elif defined(OF_OBJFW_RUNTIME)
	struct objc_method_list *methodlist;

	for (methodlist = object_getClass(class)->methodlist;
	    methodlist != NULL; methodlist = methodlist->next) {
		int i;

		for (i = 0; i < methodlist->count; i++) {
			SEL selector = (SEL)&methodlist->methods[i].sel;

			/*
			 * Don't replace methods implemented in receiving class.
			 */
			if ([self methodForSelector: selector] !=
			    [superclass methodForSelector: selector])
				continue;

			[self replaceClassMethod: selector
			     withMethodFromClass: class];
		}
	}

	for (methodlist = class->methodlist; methodlist != NULL;
	    methodlist = methodlist->next) {
		int i;

		for (i = 0; i < methodlist->count; i++) {
			SEL selector = (SEL)&methodlist->methods[i].sel;

			/*
			 * Don't replace methods implemented in receiving class.
			 */
			if ([self instanceMethodForSelector: selector] !=
			    [superclass instanceMethodForSelector: selector])
				continue;

			[self replaceInstanceMethod: selector
				withMethodFromClass: class];
		}
	}
#endif

	[self inheritMethodsFromClass: [class superclass]];
}

- init
{
	Class class;
	void (*last)(id, SEL) = NULL;

	for (class = object_getClass(self); class != Nil;
	    class = class_getSuperclass(class)) {
		void (*construct)(id, SEL);

		if ([class instancesRespondToSelector: cxx_construct]) {
			if ((construct = (void(*)(id, SEL))[class
			    instanceMethodForSelector: cxx_construct]) != last)
				construct(self, cxx_construct);

			last = construct;
		} else
			break;
	}

	return self;
}

- (Class)class
{
	return object_getClass(self);
}

- (OFString*)className
{
	return [OFString stringWithCString: object_getClassName(self)
				  encoding: OF_STRING_ENCODING_ASCII];
}

- (BOOL)isKindOfClass: (Class)class
{
	Class iter;

	for (iter = object_getClass(self); iter != Nil;
	    iter = class_getSuperclass(iter))
		if (iter == class)
			return YES;

	return NO;
}

- (BOOL)isMemberOfClass: (Class)class
{
	return (object_getClass(self) == class);
}

- (BOOL)respondsToSelector: (SEL)selector
{
	return class_respondsToSelector(object_getClass(self), selector);
}

- (BOOL)conformsToProtocol: (Protocol*)protocol
{
	return [object_getClass(self) conformsToProtocol: protocol];
}

- (IMP)methodForSelector: (SEL)selector
{
	return class_getMethodImplementation(object_getClass(self), selector);
}

- (id)performSelector: (SEL)selector
{
	id (*imp)(id, SEL) = (id(*)(id, SEL))[self methodForSelector: selector];

	return imp(self, selector);
}

- (id)performSelector: (SEL)selector
	   withObject: (id)object
{
	id (*imp)(id, SEL, id) =
	    (id(*)(id, SEL, id))[self methodForSelector: selector];

	return imp(self, selector, object);
}

- (id)performSelector: (SEL)selector
	   withObject: (id)object
	   withObject: (id)otherObject
{
	id (*imp)(id, SEL, id, id) =
	    (id(*)(id, SEL, id, id))[self methodForSelector: selector];

	return imp(self, selector, object, otherObject);
}

- (const char*)typeEncodingForSelector: (SEL)selector
{
#if defined(OF_OBJFW_RUNTIME)
	const char *ret;

	if ((ret = objc_get_type_encoding(object_getClass(self),
	    selector)) == NULL)
		@throw [OFNotImplementedException
		    exceptionWithClass: [self class]
			      selector: selector];

	return ret;
#else
	Method m;
	const char *ret;

	if ((m = class_getInstanceMethod(object_getClass(self),
	    selector)) == NULL || (ret = method_getTypeEncoding(m)) == NULL)
		@throw [OFNotImplementedException
		    exceptionWithClass: [self class]
			      selector: selector];

	return ret;
#endif
}

- (BOOL)isEqual: (id)object
{
	/* Classes containing data should reimplement this! */
	return (self == object);
}

- (uint32_t)hash
{
	/* Classes containing data should reimplement this! */
	return (uint32_t)(uintptr_t)self;
}

- (OFString*)description
{
	/* Classes containing data should reimplement this! */
	return [OFString stringWithFormat: @"<%@: %p>", [self className], self];
}

- (void*)allocMemoryWithSize: (size_t)size
{
	void *pointer;
	struct pre_mem *preMem;

	if (size > SIZE_MAX - PRE_IVAR_ALIGN)
		@throw [OFOutOfRangeException exceptionWithClass: [self class]];

	if ((pointer = malloc(PRE_MEM_ALIGN + size)) == NULL)
		@throw [OFOutOfMemoryException exceptionWithClass: [self class]
						    requestedSize: size];
	preMem = pointer;

	preMem->owner = self;
	preMem->prev = PRE_IVAR->lastMem;
	preMem->next = NULL;

	if (PRE_IVAR->lastMem != NULL)
		PRE_IVAR->lastMem->next = preMem;

	PRE_IVAR->lastMem = preMem;

	return (char*)pointer + PRE_MEM_ALIGN;
}

- (void*)allocMemoryWithSize: (size_t)size
		       count: (size_t)count
{
	if (size == 0 || count == 0)
		return NULL;

	if (count > SIZE_MAX / size)
		@throw [OFOutOfRangeException exceptionWithClass: [self class]];

	return [self allocMemoryWithSize: size * count];
}

- (void*)resizeMemory: (void*)pointer
		 size: (size_t)size
{
	void *new;
	struct pre_mem *preMem;

	if (pointer == NULL)
		return [self allocMemoryWithSize: size];

	if (size == 0) {
		[self freeMemory: pointer];
		return NULL;
	}

	if (PRE_MEM(pointer)->owner != self)
		@throw [OFMemoryNotPartOfObjectException
		    exceptionWithClass: [self class]
			       pointer: pointer];

	if ((new = realloc(PRE_MEM(pointer), PRE_MEM_ALIGN + size)) == NULL)
		@throw [OFOutOfMemoryException exceptionWithClass: [self class]
						    requestedSize: size];
	preMem = new;

	if (preMem != PRE_MEM(pointer)) {
		if (preMem->prev != NULL)
			preMem->prev->next = preMem;
		if (preMem->next != NULL)
			preMem->next->prev = preMem;

		if (PRE_IVAR->firstMem == PRE_MEM(pointer))
			PRE_IVAR->firstMem = preMem;
		if (PRE_IVAR->lastMem == PRE_MEM(pointer))
			PRE_IVAR->lastMem = preMem;
	}

	return (char*)new + PRE_MEM_ALIGN;
}

- (void*)resizeMemory: (void*)pointer
		 size: (size_t)size
		count: (size_t)count
{
	if (pointer == NULL)
		return [self allocMemoryWithSize: size
					   count: count];

	if (size == 0 || count == 0) {
		[self freeMemory: pointer];
		return NULL;
	}

	if (count > SIZE_MAX / size)
		@throw [OFOutOfRangeException exceptionWithClass: [self class]];

	return [self resizeMemory: pointer
			     size: size * count];
}

- (void)freeMemory: (void*)pointer
{
	if (pointer == NULL)
		return;

	if (PRE_MEM(pointer)->owner != self)
		@throw [OFMemoryNotPartOfObjectException
		    exceptionWithClass: [self class]
			       pointer: pointer];

	if (PRE_MEM(pointer)->prev != NULL)
		PRE_MEM(pointer)->prev->next = PRE_MEM(pointer)->next;
	if (PRE_MEM(pointer)->next != NULL)
		PRE_MEM(pointer)->next->prev = PRE_MEM(pointer)->prev;

	if (PRE_IVAR->firstMem == PRE_MEM(pointer))
		PRE_IVAR->firstMem = PRE_MEM(pointer)->next;
	if (PRE_IVAR->lastMem == PRE_MEM(pointer))
		PRE_IVAR->lastMem = PRE_MEM(pointer)->prev;

	/* To detect double-free */
	PRE_MEM(pointer)->owner = nil;

	free(PRE_MEM(pointer));
}

- retain
{
#if defined(OF_ATOMIC_OPS)
	of_atomic_inc_32(&PRE_IVAR->retainCount);
#elif defined(OF_THREADS)
	assert(of_spinlock_lock(&PRE_IVAR->retainCountSpinlock));
	PRE_IVAR->retainCount++;
	assert(of_spinlock_unlock(&PRE_IVAR->retainCountSspinlock));
#else
	PRE_IVAR->retainCount++;
#endif

	return self;
}

- (unsigned int)retainCount
{
	assert(PRE_IVAR->retainCount >= 0);
	return PRE_IVAR->retainCount;
}

- (void)release
{
#if defined(OF_ATOMIC_OPS)
	if (of_atomic_dec_32(&PRE_IVAR->retainCount) <= 0)
		[self dealloc];
#elif defined(OF_THREADS)
	size_t c;

	assert(of_spinlock_lock(&PRE_IVAR->retainCountSpinlock));
	c = --PRE_IVAR->retainCount;
	assert(of_spinlock_unlock(&PRE_IVAR->retainCountSpinlock));

	if (c == 0)
		[self dealloc];
#else
	if (--PRE_IVAR->retainCount == 0)
		[self dealloc];
#endif
}

- autorelease
{
	/*
	 * Cache OFAutoreleasePool since class lookups are expensive with the
	 * GNU ABI.
	 */
	if (autoreleasePool == Nil)
		autoreleasePool = [OFAutoreleasePool class];

	return [autoreleasePool addObject: self];
}

- self
{
	return self;
}

- (BOOL)isProxy
{
	return NO;
}

- (void)dealloc
{
	Class class;
	void (*last)(id, SEL) = NULL;
	struct pre_mem *iter;

	for (class = object_getClass(self); class != Nil;
	    class = class_getSuperclass(class)) {
		void (*destruct)(id, SEL);

		if ([class instancesRespondToSelector: cxx_destruct]) {
			if ((destruct = (void(*)(id, SEL))[class
			    instanceMethodForSelector: cxx_destruct]) != last)
				destruct(self, cxx_destruct);

			last = destruct;
		} else
			break;
	}

	iter = PRE_IVAR->firstMem;
	while (iter != NULL) {
		struct pre_mem *next = iter->next;

		/*
		 * We can use owner as a sentinel to prevent exploitation in
		 * case there is a buffer underflow somewhere.
		 */
		if (iter->owner != self)
			abort();

		free(iter);

		iter = next;
	}

	free((char*)self - PRE_IVAR_ALIGN);
}

/* Required to use properties with the Apple runtime */
- copyWithZone: (void*)zone
{
	if (zone != NULL)
		@throw [OFNotImplementedException
		    exceptionWithClass: [self class]
			      selector: _cmd];

	return [(id)self copy];
}

- mutableCopyWithZone: (void*)zone
{
	if (zone != NULL)
		@throw [OFNotImplementedException
		    exceptionWithClass: [self class]
			      selector: _cmd];

	return [(id)self mutableCopy];
}

/*
 * Those are needed as the root class is the superclass of the root class's
 * metaclass and thus instance methods can be sent to class objects as well.
 */
+ (void*)allocMemoryWithSize: (size_t)size
{
	@throw [OFNotImplementedException exceptionWithClass: self
						    selector: _cmd];
}

+ (void*)allocMemoryWithSize: (size_t)size
		       count: (size_t)count
{
	@throw [OFNotImplementedException exceptionWithClass: self
						    selector: _cmd];
}

+ (void*)resizeMemory: (void*)pointer
		 size: (size_t)size
{
	@throw [OFNotImplementedException exceptionWithClass: self
						    selector: _cmd];
}

+ (void*)resizeMemory: (void*)pointer
		 size: (size_t)size
		count: (size_t)count
{
	@throw [OFNotImplementedException exceptionWithClass: self
						    selector: _cmd];
}

+ (void)freeMemory: (void*)pointer
{
	@throw [OFNotImplementedException exceptionWithClass: self
						    selector: _cmd];
}

+ retain
{
	return self;
}

+ autorelease
{
	return self;
}

+ (unsigned int)retainCount
{
	return OF_RETAIN_COUNT_MAX;
}

+ (void)release
{
}

+ (void)dealloc
{
	@throw [OFNotImplementedException exceptionWithClass: self
						    selector: _cmd];
}

+ copyWithZone: (void*)zone
{
	@throw [OFNotImplementedException exceptionWithClass: self
						    selector: _cmd];
}

+ mutableCopyWithZone: (void*)zone
{
	@throw [OFNotImplementedException exceptionWithClass: self
						    selector: _cmd];
}
@end