ObjFW  Check-in [e76a7f52c1]

/**
 * \returns An OFEnumerator to enumerate through all objects of the collection
 */
- (OFEnumerator*)objectEnumerator;

/**
 * \param The object which is checked for being in the collection
 * \return A boolean whether the collection contains the specified object.
 * \return A boolean whether the collection contains the specified object
 */
- (BOOL)containsObject: (id)obj;
- (BOOL)containsObject: (id)object;

/**
 * \param The object which is checked for being in the collection
 * \return A boolean whether the collection contains an object with the
 *	   specified address.
 */
- (BOOL)containsObjectIdenticalTo: (id)obj;
- (BOOL)containsObjectIdenticalTo: (id)object;
@end

@implementation OFDataArray (Hashing)
- (OFString*)MD5Hash
{
	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
	OFMD5Hash *hash = [OFMD5Hash MD5Hash];
	uint8_t *digest;
	char retCString[OF_MD5_DIGEST_SIZE * 2];
	char cString[OF_MD5_DIGEST_SIZE * 2];
	size_t i;

	[hash updateWithBuffer: data
			ofSize: count * itemSize];
			length: count * itemSize];
	digest = [hash digest];

	for (i = 0; i < OF_MD5_DIGEST_SIZE; i++) {
		uint8_t high, low;

		high = digest[i] >> 4;
		low  = digest[i] & 0x0F;

		retCString[i * 2] = (high > 9 ? high - 10 + 'a' : high + '0');
		retCString[i * 2 + 1] = (low > 9 ? low - 10 + 'a' : low + '0');
		cString[i * 2] = (high > 9 ? high - 10 + 'a' : high + '0');
		cString[i * 2 + 1] = (low > 9 ? low - 10 + 'a' : low + '0');
	}

	[pool release];

	return [OFString stringWithCString: retCString
	return [OFString stringWithCString: cString
				    length: 32];
}

- (OFString*)SHA1Hash
{
	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
	OFMD5Hash *hash = [OFSHA1Hash SHA1Hash];
	uint8_t *digest;
	char retCString[OF_SHA1_DIGEST_SIZE * 2];
	char cString[OF_SHA1_DIGEST_SIZE * 2];
	size_t i;

	[hash updateWithBuffer: data
			ofSize: count * itemSize];
			length: count * itemSize];
	digest = [hash digest];

	for (i = 0; i < OF_SHA1_DIGEST_SIZE; i++) {
		uint8_t high, low;

		high = digest[i] >> 4;
		low  = digest[i] & 0x0F;

		retCString[i * 2] = (high > 9 ? high - 10 + 'a' : high + '0');
		retCString[i * 2 + 1] = (low > 9 ? low - 10 + 'a' : low + '0');
		cString[i * 2] = (high > 9 ? high - 10 + 'a' : high + '0');
		cString[i * 2 + 1] = (low > 9 ? low - 10 + 'a' : low + '0');
	}

	[pool release];

	return [OFString stringWithCString: retCString
	return [OFString stringWithCString: cString
				    length: 40];
}
@end

	return isAtEndOfStream;
}

- (size_t)_readNBytes: (size_t)length
	   intoBuffer: (char*)buffer
{
	size_t retLength;
	size_t ret;

	if (fileDescriptor == -1 || isAtEndOfStream)
		@throw [OFReadFailedException newWithClass: isa
						    stream: self
					   requestedLength: length];
	if ((retLength = read(fileDescriptor, buffer, length)) == 0)
	if ((ret = read(fileDescriptor, buffer, length)) == 0)
		isAtEndOfStream = YES;

	return retLength;
	return ret;
}

- (size_t)_writeNBytes: (size_t)length
	    fromBuffer: (const char*)buffer
{
	size_t retLength;
	size_t ret;

	if (fileDescriptor == -1 || isAtEndOfStream ||
	    (retLength = write(fileDescriptor, buffer, length)) < length)
	    (ret = write(fileDescriptor, buffer, length)) < length)
		@throw [OFWriteFailedException newWithClass: isa
						     stream: self
					    requestedLength: length];

	return retLength;
	return ret;
}

- (void)_seekToOffset: (off_t)offset
{
	if (lseek(fileDescriptor, offset, SEEK_SET) == -1)
		@throw [OFSeekFailedException newWithClass: isa
						    stream: self
						    offset: offset
						    whence: SEEK_SET];
}

- (off_t)_seekForwardWithOffset: (off_t)offset
{
	off_t retOffset;
	off_t ret;

	if ((retOffset = lseek(fileDescriptor, offset, SEEK_CUR)) == -1)
	if ((ret = lseek(fileDescriptor, offset, SEEK_CUR)) == -1)
		@throw [OFSeekFailedException newWithClass: isa
						    stream: self
						    offset: offset
						    whence: SEEK_CUR];

	return retOffset;
	return ret;
}

- (off_t)_seekToOffsetRelativeToEnd: (off_t)offset
{
	off_t retOffset;
	off_t ret;

	if ((retOffset = lseek(fileDescriptor, offset, SEEK_END)) == -1)
	if ((ret = lseek(fileDescriptor, offset, SEEK_END)) == -1)
		@throw [OFSeekFailedException newWithClass: isa
						    stream: self
						    offset: offset
						    whence: SEEK_END];

	return retOffset;
	return ret;
}

- (int)fileDescriptor
{
	return fileDescriptor;
}

/**
 * This callback is called when the OFHTTPRequest received data.
 *
 * This is useful for example if you want to update a status display.
 *
 * \param request The OFHTTPRequest which received data
 * \param data The data the OFHTTPRequest received
 * \param len The length of the data received, in bytes
 * \param length The length of the data received, in bytes
 */
-  (void)request: (OFHTTPRequest*)request
  didReceiveData: (const char*)data
      withLength: (size_t)len;
      withLength: (size_t)length;

/**
 * This callback is called when the OFHTTPRequest will follow a redirect.
 *
 * If you want to get the headers and data for each redirect, set the number of
 * redirects to 0 and perform a new OFHTTPRequest for each redirect. However,
 * this callback will not be called then and you have to look at the status code
 * to detect a redirect.
 *
 * This callback will only be called if the OFHTTPRequest will follow a
 * redirect. If the maximum number of redirects has been reached already, this
 * callback will not be called.
 *
 * \param request The OFHTTPRequest which will follow a redirect
 * \param url The URL to which it will follow a redirect
 * \param URL The URL to which it will follow a redirect
 * \return A boolean whether the OFHTTPRequest should follow the redirect
 */
-	 (BOOL)request: (OFHTTPRequest*)request
  willFollowRedirectTo: (OFURL*)url;
  willFollowRedirectTo: (OFURL*)URL;
@end

/**
 * \brief A class for storing and performing HTTP requests.
 */
@interface OFHTTPRequest: OFObject
{

/**
 * \return A new, autoreleased OFHTTPRequest
 */
+ request;

/**
 * \param url The URL for the request
 * \param URL The URL for the request
 * \return A new, autoreleased OFHTTPRequest
 */
+ requestWithURL: (OFURL*)url;
+ requestWithURL: (OFURL*)URL;

/**
 * Initializes an already allocated OFHTTPRequest with the specified URL.
 *
 * \param url The URL for the request
 * \param URL The URL for the request
 * \return An initialized OFHTTPRequest
 */
- initWithURL: (OFURL*)url;
- initWithURL: (OFURL*)URL;

/**
 * Sets the URL for the HTTP request.
 *
 * \param URL The URL for the HTTP request
 */
- (void)setURL: (OFURL*)url;
- (void)setURL: (OFURL*)URL;

/**
 * \return The URL for the HTTP request
 */
- (OFURL*)URL;

/**
 * Sets the request type for the HTTP request.
 *
 * \param type The request type for the HTTP request
 * \param requestType The request type for the HTTP request
 */
- (void)setRequestType: (of_http_request_type_t)type;
- (void)setRequestType: (of_http_request_type_t)requestType;

/**
 * \return The request type for the HTTP request
 */
- (of_http_request_type_t)requestType;

/**
 * Sets the query string for the HTTP request.
 *
 * \param qs The query string for the HTTP request
 * \param queryString The query string for the HTTP request
 */
- (void)setQueryString: (OFString*)qs;
- (void)setQueryString: (OFString*)queryString;

/**
 * \return The query string for the HTTP request
 */
- (OFString*)queryString;

/**

/**
 * Sets whether an OFDataArray with the data is created.
 *
 * Setting this to NO is only useful if you are using the delegate to handle the
 * data.
 *
 * \param enabled Whether to store the data in an OFDataArray
 * \param storesData Whether to store the data in an OFDataArray
 */
- (void)setStoresData: (BOOL)enabled;
- (void)setStoresData: (BOOL)storesData;

/**
 * \return Whether an OFDataArray with the data is created
 */
- (BOOL)storesData;

/**

@implementation OFHTTPRequest
+ request
{
	return [[[self alloc] init] autorelease];
}

+ requestWithURL: (OFURL*)url
+ requestWithURL: (OFURL*)URL
{
	return [[[self alloc] initWithURL: url] autorelease];
	return [[[self alloc] initWithURL: URL] autorelease];
}

- init
{
	self = [super init];

	requestType = OF_HTTP_REQUEST_TYPE_GET;
	headers = [[OFDictionary alloc]
	    initWithObject: @"Something using ObjFW "
			    @"<https://webkeks.org/objfw/>"
		    forKey: @"User-Agent"];
	storesData = YES;

	return self;
}

- initWithURL: (OFURL*)url
- initWithURL: (OFURL*)URL_
{
	self = [self init];

	@try {
		[self setURL: url];
		[self setURL: URL_];
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (void)dealloc
{
	[URL release];
	[queryString release];
	[headers release];
	[(id)delegate release];

	[super dealloc];
}

- (void)setURL: (OFURL*)url
- (void)setURL: (OFURL*)URL_
{
	OF_SETTER(URL, url, YES, YES)
	OF_SETTER(URL, URL_, YES, YES)
}

- (OFURL*)URL
{
	OF_GETTER(URL, YES)
}

- (void)setRequestType: (of_http_request_type_t)type
- (void)setRequestType: (of_http_request_type_t)requestType_
{
	requestType = type;
	requestType = requestType_;
}

- (of_http_request_type_t)requestType
{
	return requestType;
}

- (void)setQueryString: (OFString*)qs
- (void)setQueryString: (OFString*)queryString_
{
	OF_SETTER(queryString, qs, YES, YES)
	OF_SETTER(queryString, queryString_, YES, YES)
}

- (OFString*)queryString
{
	OF_GETTER(queryString, YES)
}

}

- (id <OFHTTPRequestDelegate>)delegate
{
	OF_GETTER(delegate, YES)
}

- (void)setStoresData: (BOOL)enabled
- (void)setStoresData: (BOOL)storesData_
{
	storesData = enabled;
	storesData = storesData_;
}

- (BOOL)storesData
{
	return storesData;
}

	@try {
		OFString *line, *path;
		OFMutableDictionary *serverHeaders;
		OFDataArray *data;
		OFEnumerator *enumerator;
		OFString *key;
		int status;
		const char *t = NULL;
		char *buf;
		const char *type = NULL;
		char *buffer;
		size_t bytesReceived;
		OFString *contentLengthHeader;

		[sock connectToHost: [URL host]
			     onPort: [URL port]];

		/*
		 * Work around a bug with packet bisection in lighttpd when
		 * using HTTPS.
		 */
		[sock setBuffersWrites: YES];

		if (requestType == OF_HTTP_REQUEST_TYPE_GET)
			t = "GET";
			type = "GET";
		if (requestType == OF_HTTP_REQUEST_TYPE_HEAD)
			t = "HEAD";
			type = "HEAD";
		if (requestType == OF_HTTP_REQUEST_TYPE_POST)
			t = "POST";
			type = "POST";

		if ([(path = [URL path]) isEqual: @""])
			path = @"/";

		if ([URL query] != nil)
			[sock writeFormat: @"%s %@?%@ HTTP/1.0\r\n",
					   t, path, [URL query]];
					   type, path, [URL query]];
		else
			[sock writeFormat: @"%s %@ HTTP/1.0\r\n", t, path];
			[sock writeFormat: @"%s %@ HTTP/1.0\r\n", type, path];

		if ([URL port] == 80)
			[sock writeFormat: @"Host: %@\r\n", [URL host]];
		else
			[sock writeFormat: @"Host: %@:%d\r\n", [URL host],
					   [URL port]];

		   withStatusCode: status];

		if (storesData)
			data = [OFDataArray dataArrayWithItemSize: 1];
		else
			data = nil;

		buf = [self allocMemoryWithSize: of_pagesize];
		buffer = [self allocMemoryWithSize: of_pagesize];
		bytesReceived = 0;
		@try {
			size_t len;

			while ((len = [sock readNBytes: of_pagesize
					    intoBuffer: buf]) > 0) {
					    intoBuffer: buffer]) > 0) {
				[delegate request: self
				   didReceiveData: buf
				   didReceiveData: buffer
				       withLength: len];

				bytesReceived += len;
				[data addNItems: len
				     fromCArray: buf];
				     fromCArray: buffer];
			}
		} @finally {
			[self freeMemory: buf];
			[self freeMemory: buffer];
		}

		if ((contentLengthHeader =
		    [serverHeaders objectForKey: @"Content-Length"]) != nil) {
			intmax_t cl = [contentLengthHeader decimalValue];

			if (cl > SIZE_MAX)

 */
+ (size_t)blockSize;

/**
 * Adds a buffer to the hash to be calculated.
 *
 * \param buf The buffer which should be included into the calculation.
 * \param size The size of the buffer
 * \param length The length of the buffer
 */
- (void)updateWithBuffer: (const char*)buf
		  ofSize: (size_t)size;
		  length: (size_t)length;

/**
 * \return A buffer containing the hash. The size of the buffer is depending
 *	   on the hash used. The buffer is part of object's memory pool.
 */
- (uint8_t*)digest;

+ (size_t)blockSize
{
	@throw [OFNotImplementedException newWithClass: self
					      selector: _cmd];
}

- (void)updateWithBuffer: (const char*)buffer
		  ofSize: (size_t)size
		  length: (size_t)length
{
	@throw [OFNotImplementedException newWithClass: isa
					      selector: _cmd];
}

- (uint8_t*)digest
{

 * A struct that contains a pointer to the next list object, the previous list
 * object and the object.
 */
struct of_list_object_t {
	/// A pointer to the next list object in the list
	of_list_object_t *next;
	/// A pointer to the previous list object in the list
	of_list_object_t *prev;
	of_list_object_t *previous;
	/// The object for the list object
	id		 object;
};

/**
 * \brief A class which provides easy to use double-linked lists.
 */

 * \return The last list object in the list
 */
- (of_list_object_t*)lastListObject;

/**
 * Appends an object to the list.
 *
 * \param obj The object to append
 * \param object The object to append
 * \return An of_list_object_t, needed to identify the object inside the list.
 *	   For example, if you want to remove an object from the list, you need
 *	   its of_list_object_t.
 */
- (of_list_object_t*)appendObject: (id)obj;
- (of_list_object_t*)appendObject: (id)object;

/**
 * Prepends an object to the list.
 *
 * \param obj The object to prepend
 * \param object The object to prepend
 * \return An of_list_object_t, needed to identify the object inside the list.
 *	   For example, if you want to remove an object from the list, you need
 *	   its of_list_object_t.
 */
- (of_list_object_t*)prependObject: (id)obj;
- (of_list_object_t*)prependObject: (id)object;

/**
 * Inserts an object before another object.
 * \param obj The object to insert
 * \param listobj The of_list_object_t of the object before which it should be
 * \param object The object to insert
 * \param listObject The of_list_object_t of the object before which it should be
 *	  inserted
 * \return An of_list_object_t, needed to identify the object inside the list.
 *	   For example, if you want to remove an object from the list, you need
 *	   its of_list_object_t.
 */
- (of_list_object_t*)insertObject: (id)object
		 beforeListObject: (of_list_object_t*)listObject;

/**
 * Inserts an object after another object.
 * \param object The object to insert
 * \param listObject The of_list_object_t of the object after which it should be
 *	  inserted
 * \return An of_list_object_t, needed to identify the object inside the list.
 *	   For example, if you want to remove an object from the list, you need
 *	   its of_list_object_t.
 */
- (of_list_object_t*)insertObject: (id)obj
- (of_list_object_t*)insertObject: (id)object
		 beforeListObject: (of_list_object_t*)listobj;

/**
 * Inserts an object after another object.
 * \param obj The object to insert
 * \param listobj The of_list_object_t of the object after which it should be
 *	  inserted
 * \return An of_list_object_t, needed to identify the object inside the list.
 *	   For example, if you want to remove an object from the list, you need
 *	   its of_list_object_t.
 */
- (of_list_object_t*)insertObject: (id)obj
		  afterListObject: (of_list_object_t*)listobj;
		  afterListObject: (of_list_object_t*)listObject;

/**
 * Removes the object with the specified list object from the list.
 *
 * \param listobj The list object returned by append / prepend
 * \param listObject The list object returned by append / prepend
 */
- (void)removeListObject: (of_list_object_t*)listobj;
- (void)removeListObject: (of_list_object_t*)listObject;
@end

@interface OFListEnumerator: OFEnumerator
{
	OFList		 *list;
	of_list_object_t *current;
	unsigned long	 mutations;
	unsigned long	 *mutationsPtr;
}

-     initWithList: (OFList*)list
  mutationsPointer: (unsigned long*)mutationsPtr;
@end

}

- (of_list_object_t*)lastListObject;
{
	return lastListObject;
}

- (of_list_object_t*)appendObject: (id)obj
- (of_list_object_t*)appendObject: (id)object
{
	of_list_object_t *o;
	of_list_object_t *listObject;

	o = [self allocMemoryWithSize: sizeof(of_list_object_t)];
	o->object = [obj retain];
	o->next = NULL;
	o->prev = lastListObject;
	listObject = [self allocMemoryWithSize: sizeof(of_list_object_t)];
	listObject->object = [object retain];
	listObject->next = NULL;
	listObject->previous = lastListObject;

	if (lastListObject != NULL)
		lastListObject->next = o;
		lastListObject->next = listObject;

	lastListObject = o;
	lastListObject = listObject;
	if (firstListObject == NULL)
		firstListObject = o;
		firstListObject = listObject;

	count++;
	mutations++;

	return o;
	return listObject;
}

- (of_list_object_t*)prependObject: (id)obj
- (of_list_object_t*)prependObject: (id)object
{
	of_list_object_t *o;
	of_list_object_t *listObject;

	o = [self allocMemoryWithSize: sizeof(of_list_object_t)];
	o->object = [obj retain];
	o->next = firstListObject;
	o->prev = NULL;
	listObject = [self allocMemoryWithSize: sizeof(of_list_object_t)];
	listObject->object = [object retain];
	listObject->next = firstListObject;
	listObject->previous = NULL;

	if (firstListObject != NULL)
		firstListObject->prev = o;
		firstListObject->previous = listObject;

	firstListObject = o;
	firstListObject = listObject;
	if (lastListObject == NULL)
		lastListObject = o;
		lastListObject = listObject;

	count++;
	mutations++;

	return o;
	return listObject;
}

- (of_list_object_t*)insertObject: (id)obj
		 beforeListObject: (of_list_object_t*)listobj
- (of_list_object_t*)insertObject: (id)object
		 beforeListObject: (of_list_object_t*)listObject
{
	of_list_object_t *o;
	of_list_object_t *newListObject;

	o = [self allocMemoryWithSize: sizeof(of_list_object_t)];
	o->object = [obj retain];
	o->next = listobj;
	o->prev = listobj->prev;
	newListObject = [self allocMemoryWithSize: sizeof(of_list_object_t)];
	newListObject->object = [object retain];
	newListObject->next = listObject;
	newListObject->previous = listObject->previous;

	if (listobj->prev != NULL)
	if (listObject->previous != NULL)
		listobj->prev->next = o;
		listObject->previous->next = newListObject;

	listobj->prev = o;
	listObject->previous = newListObject;

	if (listobj == firstListObject)
		firstListObject = o;
	if (listObject == firstListObject)
		firstListObject = newListObject;

	count++;
	mutations++;

	return o;
	return newListObject;
}

- (of_list_object_t*)insertObject: (id)obj
		  afterListObject: (of_list_object_t*)listobj
- (of_list_object_t*)insertObject: (id)object
		  afterListObject: (of_list_object_t*)listObject
{
	of_list_object_t *o;
	of_list_object_t *newListObject;

	o = [self allocMemoryWithSize: sizeof(of_list_object_t)];
	o->object = [obj retain];
	o->next = listobj->next;
	o->prev = listobj;
	newListObject = [self allocMemoryWithSize: sizeof(of_list_object_t)];
	newListObject->object = [object retain];
	newListObject->next = listObject->next;
	newListObject->previous = listObject;

	if (listobj->next != NULL)
		listobj->next->prev = o;
	if (listObject->next != NULL)
		listObject->next->previous = newListObject;

	listobj->next = o;
	listObject->next = newListObject;

	if (listobj == lastListObject)
		lastListObject = o;
	if (listObject == lastListObject)
		lastListObject = newListObject;

	count++;
	mutations++;

	return o;
	return newListObject;
}

- (void)removeListObject: (of_list_object_t*)listobj
- (void)removeListObject: (of_list_object_t*)listObject
{
	if (listobj->prev != NULL)
		listobj->prev->next = listobj->next;
	if (listobj->next != NULL)
		listobj->next->prev = listobj->prev;
	if (listObject->previous != NULL)
		listObject->previous->next = listObject->next;
	if (listObject->next != NULL)
		listObject->next->previous = listObject->previous;

	if (firstListObject == listobj)
		firstListObject = listobj->next;
	if (lastListObject == listobj)
		lastListObject = listobj->prev;
	if (firstListObject == listObject)
		firstListObject = listObject->next;
	if (lastListObject == listObject)
		lastListObject = listObject->previous;

	count--;
	mutations++;

	[listobj->object release];
	[listObject->object release];

	[self freeMemory: listobj];
	[self freeMemory: listObject];
}

- (size_t)count
{
	return count;
}

- (BOOL)isEqual: (id)obj
- (BOOL)isEqual: (id)object
{
	OFList *otherList;
	of_list_object_t *iter, *iter2;

	if (![obj isKindOfClass: [OFList class]])
	if (![object isKindOfClass: [OFList class]])
		return NO;

	otherList = (OFList*)object;

	if ([(OFList*)obj count] != count)
	if ([otherList count] != count)
		return NO;

	for (iter = firstListObject, iter2 = [(OFList*)obj firstListObject];
	for (iter = firstListObject, iter2 = [otherList firstListObject];
	    iter != NULL && iter2 != NULL;
	    iter = iter->next, iter2 = iter2->next)
		if (![iter->object isEqual: iter2->object])
			return NO;

	/* One is bigger than the other although we checked the count */
	assert(iter == NULL && iter2 == NULL);

	return YES;
}

- (BOOL)containsObject: (id)obj
- (BOOL)containsObject: (id)object
{
	of_list_object_t *iter;

	if (count == 0)
		return NO;

	for (iter = firstListObject; iter != NULL; iter = iter->next)
		if ([iter->object isEqual: obj])
		if ([iter->object isEqual: object])
			return YES;

	return NO;
}

- (BOOL)containsObjectIdenticalTo: (id)obj
- (BOOL)containsObjectIdenticalTo: (id)object
{
	of_list_object_t *iter;

	if (count == 0)
		return NO;

	for (iter = firstListObject; iter != NULL; iter = iter->next)
		if (iter->object == obj)
		if (iter->object == object)
			return YES;

	return NO;
}

- copy
{
	OFList *new = [[OFList alloc] init];
	of_list_object_t *iter, *o, *prev;
	OFList *copy = [[OFList alloc] init];
	of_list_object_t *iter, *listObject, *previous;

	o = NULL;
	prev = NULL;
	listObject = NULL;
	previous = NULL;

	@try {
		for (iter = firstListObject; iter != NULL; iter = iter->next) {
			listObject = [copy allocMemoryWithSize:
			o = [new allocMemoryWithSize: sizeof(of_list_object_t)];
			o->object = [iter->object retain];
			o->next = NULL;
			o->prev = prev;
			    sizeof(of_list_object_t)];
			listObject->object = [iter->object retain];
			listObject->next = NULL;
			listObject->previous = previous;

			if (new->firstListObject == NULL)
				new->firstListObject = o;
			if (prev != NULL)
				prev->next = o;
			if (copy->firstListObject == NULL)
				copy->firstListObject = listObject;
			if (previous != NULL)
				previous->next = listObject;

			new->count++;
			copy->count++;

			prev = o;
			previous = listObject;
		}
	} @catch (id e) {
		[new release];
		[copy release];
		@throw e;
	}

	new->lastListObject = o;
	copy->lastListObject = listObject;

	return new;
	return copy;
}

- (uint32_t)hash
{
	of_list_object_t *iter;
	uint32_t hash;

#define OF_MD5_DIGEST_SIZE  16

/**
 * \brief A class which provides functions to create an MD5 hash.
 */
@interface OFMD5Hash: OFHash
{
	uint32_t buf[4];
	uint32_t buffer[4];
	uint32_t bits[2];
	union {
		uint8_t	u8[64];
		uint32_t u32[16];
	} in;
}

#define F4(x, y, z) (y ^ (x | ~z))

/* This is the central step in the MD5 algorithm. */
#define MD5STEP(f, w, x, y, z, data, s) \
	(w += f(x, y, z) + data, w = w << s | w >> (32 - s), w += x)

static void
md5_transform(uint32_t buf[4], const uint32_t in[16])
md5_transform(uint32_t buffer[4], const uint32_t in[16])
{
	register uint32_t a, b, c, d;

	a = buf[0];
	b = buf[1];
	c = buf[2];
	d = buf[3];
	a = buffer[0];
	b = buffer[1];
	c = buffer[2];
	d = buffer[3];

	MD5STEP(F1, a, b, c, d, in[0]  + 0xD76AA478, 7);
	MD5STEP(F1, d, a, b, c, in[1]  + 0xE8C7B756, 12);
	MD5STEP(F1, c, d, a, b, in[2]  + 0x242070DB, 17);
	MD5STEP(F1, b, c, d, a, in[3]  + 0xC1BDCEEE, 22);
	MD5STEP(F1, a, b, c, d, in[4]  + 0xF57C0FAF, 7);
	MD5STEP(F1, d, a, b, c, in[5]  + 0x4787C62A, 12);

	MD5STEP(F4, c, d, a, b, in[6]  + 0xA3014314, 15);
	MD5STEP(F4, b, c, d, a, in[13] + 0x4E0811A1, 21);
	MD5STEP(F4, a, b, c, d, in[4]  + 0xF7537E82, 6);
	MD5STEP(F4, d, a, b, c, in[11] + 0xBD3AF235, 10);
	MD5STEP(F4, c, d, a, b, in[2]  + 0x2AD7D2BB, 15);
	MD5STEP(F4, b, c, d, a, in[9]  + 0xEB86D391, 21);

	buf[0] += a;
	buf[1] += b;
	buf[2] += c;
	buf[3] += d;
	buffer[0] += a;
	buffer[1] += b;
	buffer[2] += c;
	buffer[3] += d;
}

@implementation OFMD5Hash
+ MD5Hash
{
	return [[[self alloc] init] autorelease];
}

	return 64;
}

- init
{
	self = [super init];

	buf[0] = 0x67452301;
	buf[1] = 0xEFCDAB89;
	buf[2] = 0x98BADCFE;
	buf[3] = 0x10325476;
	buffer[0] = 0x67452301;
	buffer[1] = 0xEFCDAB89;
	buffer[2] = 0x98BADCFE;
	buffer[3] = 0x10325476;

	return self;
}

- (void)updateWithBuffer: (const char*)buffer
		  ofSize: (size_t)size
- (void)updateWithBuffer: (const char*)buffer_
		  length: (size_t)length
{
	uint32_t t;

	if (size == 0)
	if (length == 0)
		return;

	if (isCalculated)
		@throw [OFHashAlreadyCalculatedException newWithClass: isa
								 hash: self];

	/* Update bitcount */
	t = bits[0];
	if ((bits[0] = t + ((uint32_t)size << 3)) < t)
	if ((bits[0] = t + ((uint32_t)length << 3)) < t)
		/* Carry from low to high */
		bits[1]++;
	bits[1] += (uint32_t)size >> 29;
	bits[1] += (uint32_t)length >> 29;

	/* Bytes already in shsInfo->data */
	t = (t >> 3) & 0x3F;

	/* Handle any leading odd-sized chunks */
	if (t) {
		uint8_t *p = in.u8 + t;

		t = 64 - t;

		if (size < t) {
			memcpy(p, buffer, size);
		if (length < t) {
			memcpy(p, buffer_, length);
			return;
		}

		memcpy(p, buffer, t);
		memcpy(p, buffer_, t);
		of_bswap32_vec_if_be(in.u32, 16);
		md5_transform(buf, in.u32);
		md5_transform(buffer, in.u32);

		buffer += t;
		size -= t;
		buffer_ += t;
		length -= t;
	}

	/* Process data in 64-byte chunks */
	while (size >= 64) {
		memcpy(in.u8, buffer, 64);
	while (length >= 64) {
		memcpy(in.u8, buffer_, 64);
		of_bswap32_vec_if_be(in.u32, 16);
		md5_transform(buf, in.u32);
		md5_transform(buffer, in.u32);

		buffer += 64;
		size -= 64;
		buffer_ += 64;
		length -= 64;
	}

	/* Handle any remaining bytes of data. */
	memcpy(in.u8, buffer, size);
	memcpy(in.u8, buffer_, length);
}

- (uint8_t*)digest
{
	uint8_t	*p;
	size_t	count;

	if (isCalculated)
		return (uint8_t*)buf;
		return (uint8_t*)buffer;

	/* Compute number of bytes mod 64 */
	count = (bits[0] >> 3) & 0x3F;

	/*
	 * Set the first char of padding to 0x80. This is safe since there is
	 * always at least one byte free
	 */
	p = in.u8 + count;
	*p++ = 0x80;

	/* Bytes of padding needed to make 64 bytes */
	count = 64 - 1 - count;

	/* Pad out to 56 mod 64 */
	if (count < 8) {
		/* Two lots of padding: Pad the first block to 64 bytes */
		memset(p, 0, count);
		of_bswap32_vec_if_be(in.u32, 16);
		md5_transform(buf, in.u32);
		md5_transform(buffer, in.u32);

		/* Now fill the next block with 56 bytes */
		memset(in.u8, 0, 56);
	} else {
		/* Pad block to 56 bytes */
		memset(p, 0, count - 8);
	}
	of_bswap32_vec_if_be(in.u32, 14);

	/* Append length in bits and transform */
	in.u32[14] = bits[0];
	in.u32[15] = bits[1];

	md5_transform(buf, in.u32);
	md5_transform(buffer, in.u32);
	of_bswap32_vec_if_be(buf, 4);

	isCalculated = YES;

	return (uint8_t*)buf;
	return (uint8_t*)buffer;
}
@end

{
	unsigned long mutations;
}

/**
 * Adds an object to the OFArray.
 *
 * \param obj An object to add
 * \param object An object to add
 */
- (void)addObject: (id)obj;
- (void)addObject: (id)object;

/**
 * Adds an object to the OFArray at the specified index.
 *
 * \param obj An object to add
 * \param object An object to add
 * \param index The index where the object should be added
 */
- (void)addObject: (id)obj
- (void)addObject: (id)object
	  atIndex: (size_t)index;

/**
 * Replaces the first object equivalent to the first specified object with the
 * second specified object.
 *
 * \param old The object to replace
 * \param new_ The replacement object
 * \param oldObject The object to replace
 * \param newObject The replacement object
 */
- (void)replaceObject: (id)old
	   withObject: (id)new_;
- (void)replaceObject: (id)oldObject
	   withObject: (id)newObject;

/**
 * Replaces the object at the specified index with the specified object.
 *
 * \param index The index of the object to replace
 * \param obj The replacement object
 * \param object The replacement object
 */
- (void)replaceObjectAtIndex: (size_t)index
		  withObject: (id)obj;
		  withObject: (id)object;

/**
 * Replaces the first object that has the same address as the first specified
 * object with the second specified object.
 *
 * \param old The object to replace
 * \param new_ The replacement object
 * \param oldObject The object to replace
 * \param newObject The replacement object
 */
- (void)replaceObjectIdenticalTo: (id)old
		      withObject: (id)new_;
- (void)replaceObjectIdenticalTo: (id)oldObject
		      withObject: (id)newObject;

/**
 * Removes the first object equivalent to the specified object.
 *
 * \param obj The object to remove
 * \param object The object to remove
 */
- (void)removeObject: (id)obj;
- (void)removeObject: (id)object;

/**
 * Removes the first object that has the same address as the specified object.
 *
 * \param obj The object to remove
 * \param object The object to remove
 */
- (void)removeObjectIdenticalTo: (id)obj;
- (void)removeObjectIdenticalTo: (id)object;

/**
 * Removes the object at the specified index.
 *
 * \param index The index of the object to remove
 */
- (void)removeObjectAtIndex: (size_t)index;

/**
 * Removes the specified amount of objects from the end of the OFArray.
 *
 * \param nobjects The number of objects to remove
 * \param nObjects The number of objects to remove
 */
- (void)removeNObjects: (size_t)nobjects;
- (void)removeNObjects: (size_t)nObjects;

/**
 * Removes the specified amount of objects at the specified index.
 *
 * \param nobjects The number of objects to remove
 * \param index The index at which the objects are removed
 */
- (void)removeNObjects: (size_t)nobjects
- (void)removeNObjects: (size_t)nObjects
	       atIndex: (size_t)index;

#ifdef OF_HAVE_BLOCKS
/**
 * Replaces each object with the object returned by the block.
 *
 * \param block The block which returns a new object for each object

#import "OFEnumerationMutationException.h"
#import "OFInvalidArgumentException.h"
#import "OFOutOfRangeException.h"

@implementation OFMutableArray
- copy
{
	OFArray *new = [[OFArray alloc] init];
	OFArray *copy = [[OFArray alloc] init];
	id *objs;
	size_t count, i;

	objs = [array cArray];
	count = [array count];
	id *cArray = [array cArray];
	size_t i, count = [array count];

	[new->array addNItems: count
		   fromCArray: objs];
	[copy->array addNItems: count
		    fromCArray: cArray];

	for (i = 0; i < count; i++)
		[objs[i] retain];
		[cArray[i] retain];

	return new;
	return copy;
}

- (void)addObject: (id)obj
- (void)addObject: (id)object
{
	[array addItem: &obj];
	[obj retain];
	[array addItem: &object];
	[object retain];

	mutations++;
}
}


- (void)addObject: (id)obj
- (void)addObject: (id)object
	  atIndex: (size_t)index
{
	[array addItem: &obj
	[array addItem: &object
	       atIndex: index];
	[obj retain];
	[object retain];

	mutations++;
}

- (void)replaceObject: (id)old
	   withObject: (id)new
- (void)replaceObject: (id)oldObject
	   withObject: (id)newObject
{
	id *objs = [array cArray];
	id *cArray = [array cArray];
	size_t i, count = [array count];

	for (i = 0; i < count; i++) {
		if ([objs[i] isEqual: old]) {
			[new retain];
			[objs[i] release];
			objs[i] = new;
		if ([cArray[i] isEqual: oldObject]) {
			[newObject retain];
			[cArray[i] release];
			cArray[i] = newObject;

			return;
		}
	}
}

- (void)replaceObjectAtIndex: (size_t)index
		  withObject: (id)obj
		  withObject: (id)object
{
	id *objs = [array cArray];
	id old;
	id *cArray = [array cArray];
	id oldObject;

	if (index >= [array count])
		@throw [OFOutOfRangeException newWithClass: isa];

	old = objs[index];
	objs[index] = [obj retain];
	[old release];
	oldObject = cArray[index];
	cArray[index] = [object retain];
	[oldObject release];
}

- (void)replaceObjectIdenticalTo: (id)old
		      withObject: (id)new
- (void)replaceObjectIdenticalTo: (id)oldObject
		      withObject: (id)newObject
{
	id *objs = [array cArray];
	id *cArray = [array cArray];
	size_t i, count = [array count];

	for (i = 0; i < count; i++) {
		if (objs[i] == old) {
			[new retain];
			[objs[i] release];
			objs[i] = new;
		if (cArray[i] == oldObject) {
			[newObject retain];
			[cArray[i] release];
			cArray[i] = newObject;

			return;
		}
	}
}

- (void)removeObject: (id)obj
- (void)removeObject: (id)object
{
	id *objs = [array cArray];
	id *cArray = [array cArray];
	size_t i, count = [array count];

	for (i = 0; i < count; i++) {
		if ([objs[i] isEqual: obj]) {
			id obj = objs[i];
		if ([cArray[i] isEqual: object]) {
			object = cArray[i];

			[array removeItemAtIndex: i];
			mutations++;

			[obj release];
			[object release];

			return;
		}
	}
}

- (void)removeObjectIdenticalTo: (id)obj
- (void)removeObjectIdenticalTo: (id)object
{
	id *objs = [array cArray];
	id *cArray = [array cArray];
	size_t i, count = [array count];

	for (i = 0; i < count; i++) {
		if (objs[i] == obj) {
		if (cArray[i] == object) {
			[array removeItemAtIndex: i];
			mutations++;

			[obj release];
			[object release];

			return;
		}
	}
}

- (void)removeObjectAtIndex: (size_t)index
{
	id old = [self objectAtIndex: index];
	id object = [self objectAtIndex: index];
	[array removeItemAtIndex: index];
	[old release];
	[object release];

	mutations++;
}

- (void)removeNObjects: (size_t)nobjects
- (void)removeNObjects: (size_t)nObjects
{
	id *objs = [array cArray], *copy;
	id *cArray = [array cArray], *copy;
	size_t i, count = [array count];

	if (nobjects > count)
	if (nObjects > count)
		@throw [OFOutOfRangeException newWithClass: isa];

	copy = [self allocMemoryForNItems: nobjects
	copy = [self allocMemoryForNItems: nObjects
				 withSize: sizeof(id)];
	memcpy(copy, objs + (count - nobjects), nobjects * sizeof(id));
	memcpy(copy, cArray + (count - nObjects), nObjects * sizeof(id));

	@try {
		[array removeNItems: nobjects];
		[array removeNItems: nObjects];
		mutations++;

		for (i = 0; i < nobjects; i++)
		for (i = 0; i < nObjects; i++)
			[copy[i] release];
	} @finally {
		[self freeMemory: copy];
	}
}

- (void)removeNObjects: (size_t)nobjects
- (void)removeNObjects: (size_t)nObjects
	       atIndex: (size_t)index
{
	id *objs = [array cArray], *copy;
	id *cArray = [array cArray], *copy;
	size_t i, count = [array count];

	if (nobjects > count - index)
	if (nObjects > count - index)
		@throw [OFOutOfRangeException newWithClass: isa];

	copy = [self allocMemoryForNItems: nobjects
	copy = [self allocMemoryForNItems: nObjects
				 withSize: sizeof(id)];
	memcpy(copy, objs + index, nobjects * sizeof(id));
	memcpy(copy, cArray + index, nObjects * sizeof(id));

	@try {
		[array removeNItems: nobjects
		[array removeNItems: nObjects
			    atIndex: index];
		mutations++;

		for (i = 0; i < nobjects; i++)
		for (i = 0; i < nObjects; i++)
			[copy[i] release];
	} @finally {
		[self freeMemory: copy];
	}
}

- (int)countByEnumeratingWithState: (of_fast_enumeration_state_t*)state

	    mutationsPointer: &mutations] autorelease];
}

#ifdef OF_HAVE_BLOCKS
- (void)enumerateObjectsUsingBlock: (of_array_enumeration_block_t)block
{
	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
	id *objs = [array cArray];
	id *cArray = [array cArray];
	size_t i, count = [array count];
	BOOL stop = NO;
	unsigned long mutations2 = mutations;

	for (i = 0; i < count && !stop; i++) {
		if (mutations != mutations2)
			@throw [OFEnumerationMutationException
			    newWithClass: isa
				  object: self];

		block(objs[i], i, &stop);
		block(cArray[i], i, &stop);
		[pool releaseObjects];
	}

	[pool release];
}

- (void)replaceObjectsUsingBlock: (of_array_replace_block_t)block
{
	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
	id *objs = [array cArray];
	id *cArray = [array cArray];
	size_t i, count = [array count];
	BOOL stop = NO;
	unsigned long mutations2 = mutations;

	for (i = 0; i < count && !stop; i++) {
		id newObject;

		if (mutations != mutations2)
			@throw [OFEnumerationMutationException
			    newWithClass: isa
				  object: self];

		id new = block(objs[i], i, &stop);
		newObject = block(cArray[i], i, &stop);

		if (new == nil)
		if (newObject == nil)
			@throw [OFInvalidArgumentException newWithClass: isa
							       selector: _cmd];

		[new retain];
		[objs[i] release];
		objs[i] = new;
		[newObject retain];
		[cArray[i] release];
		cArray[i] = newObject;

		[pool releaseObjects];
	}

	[pool release];
}
#endif
@end

 * This is mostly for debugging purposes.
 */
+ (OFString*)description;

/**
 * Replaces a class method implementation with another implementation.
 *
 * \param newimp The new implementation for the class method
 * \param newImp The new implementation for the class method
 * \param selector The selector of the class method to replace
 * \return The old implementation
 */
+ (IMP)setImplementation: (IMP)newimp
+ (IMP)setImplementation: (IMP)newImp
	  forClassMethod: (SEL)selector;

/**
 * Replaces a class method with a class method from another class.
 *
 * \param selector The selector of the class method to replace
 * \param class_ The class from which the new class method should be taken
 * \return The old implementation
 */
+ (IMP)replaceClassMethod: (SEL)selector
      withMethodFromClass: (Class)class_;

/**
 * Replaces an instance method implementation with another implementation.
 *
 * \param newimp The new implementation for the instance method
 * \param newImp The new implementation for the instance method
 * \param selector The selector of the instance method to replace
 * \return The old implementation
 */
+ (IMP)setImplementation: (IMP)newimp
+ (IMP)setImplementation: (IMP)newImp
       forInstanceMethod: (SEL)selector;

/**
 * Replaces an instance method with an instance method from another class.
 *
 * \param selector The selector of the instance method to replace
 * \param class_ The class from which the new instance method should be taken

- (void*)allocMemoryWithSize: (size_t)size;

/**
 * Allocates memory for the specified number of items and stores it in the
 * object's memory pool so it can be free'd automatically when the object is
 * deallocated.
 *
 * \param nitems The number of items to allocate
 * \param nItems The number of items to allocate
 * \param size The size of each item to allocate
 * \return A pointer to the allocated memory
 */
- (void*)allocMemoryForNItems: (size_t)nitems
- (void*)allocMemoryForNItems: (size_t)nItems
		     withSize: (size_t)size;

/**
 * Resizes memory in the object's memory pool to the specified size.
 *
 * \param ptr A pointer to the already allocated memory
 * \param size The new size for the memory chunk
 * \return A pointer to the resized memory chunk
 */
- (void*)resizeMemory: (void*)ptr
	       toSize: (size_t)size;

/**
 * Resizes memory in the object's memory pool to the specific number of items of
 * the specified size.
 *
 * \param ptr A pointer to the already allocated memory
 * \param nitems The number of items to resize to
 * \param nItems The number of items to resize to
 * \param size The size of each item to resize to
 * \return A pointer to the resized memory chunk
 */
- (void*)resizeMemory: (void*)ptr
	     toNItems: (size_t)nitems
	     toNItems: (size_t)nItems
	     withSize: (size_t)size;

/**
 * Frees allocated memory and removes it from the object's memory pool.
 * Does nothing if ptr is NULL.
 *
 * \param ptr A pointer to the allocated memory

# define class_getInstanceSize class_get_instance_size
# define class_getName class_get_class_name
# define class_getSuperclass class_get_super_class
# define sel_registerName sel_get_uid
#endif

struct pre_ivar {
	void	      **memchunks;
	size_t	      memchunks_size;
	int32_t	      retain_count;
	void	      **memoryChunks;
	size_t	      memoryChunksSize;
	int32_t	      retainCount;
#if !defined(OF_ATOMIC_OPS)
	of_spinlock_t retain_spinlock;
	of_spinlock_t retainCountSpinlock;
#endif
};

/* Hopefully no arch needs more than 16 bytes padding */
#ifndef __BIGGEST_ALIGNMENT__
# define __BIGGEST_ALIGNMENT__ 16
#endif

#endif

#ifdef NEED_OBJC_PROPERTIES_INIT
extern BOOL objc_properties_init();
#endif

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

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

@implementation OFObject
+ (void)load
{
#ifdef NEED_OBJC_SYNC_INIT

+ (void)initialize
{
}

+ alloc
{
	OFObject *instance;
	size_t isize = class_getInstanceSize(self);
	size_t instanceSize = class_getInstanceSize(self);
	Class class;
	void (*last)(id, SEL) = NULL;

	if ((instance = malloc(isize + PRE_IVAR_ALIGN)) == NULL) {
	if ((instance = malloc(instanceSize + PRE_IVAR_ALIGN)) == NULL) {
		alloc_failed_exception.isa = [OFAllocFailedException class];
		@throw (OFAllocFailedException*)&alloc_failed_exception;
	}

	((struct pre_ivar*)instance)->memchunks = NULL;
	((struct pre_ivar*)instance)->memchunks_size = 0;
	((struct pre_ivar*)instance)->retain_count = 1;
	((struct pre_ivar*)instance)->memoryChunks = NULL;
	((struct pre_ivar*)instance)->memoryChunksSize = 0;
	((struct pre_ivar*)instance)->retainCount = 1;

#if !defined(OF_ATOMIC_OPS)
	if (!of_spinlock_new(&((struct pre_ivar*)instance)->retain_spinlock)) {
	if (!of_spinlock_new(
	    &((struct pre_ivar*)instance)->retainCountSpinlock)) {
		free(instance);
		@throw [OFInitializationFailedException newWithClass: self];
	}
#endif

	instance = (OFObject*)((char*)instance + PRE_IVAR_ALIGN);
	memset(instance, 0, isize);
	memset(instance, 0, instanceSize);
	instance->isa = self;

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

		if ([class instancesRespondToSelector: cxx_construct]) {
			if ((construct = (void(*)(id, SEL))[class

}

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

+ (IMP)setImplementation: (IMP)newimp
+ (IMP)setImplementation: (IMP)newImp
	  forClassMethod: (SEL)selector
{
#if defined(OF_OBJFW_RUNTIME)
	if (newimp == (IMP)0 || !class_respondsToSelector(self->isa, selector))
	if (newImp == (IMP)0 || !class_respondsToSelector(self->isa, selector))
		@throw [OFInvalidArgumentException newWithClass: self
						       selector: _cmd];

	return objc_replace_class_method(self, selector, newimp);
	return objc_replace_class_method(self, selector, newImp);
#elif defined(OF_OLD_GNU_RUNTIME)
	Method_t method;
	IMP oldimp;
	IMP oldImp;

	/* The class method is the instance method of the meta class */
	if ((method = class_get_instance_method(self->class_pointer,
	    selector)) == NULL)
		@throw [OFInvalidArgumentException newWithClass: self
						       selector: _cmd];

	if ((oldimp = method_get_imp(method)) == (IMP)0 || newimp == (IMP)0)
	if ((oldImp = method_get_imp(method)) == (IMP)0 || newImp == (IMP)0)
		@throw [OFInvalidArgumentException newWithClass: self
						       selector: _cmd];

	method->method_imp = newimp;
	method->method_imp = newImp;

	/* Update the dtable if necessary */
	if (sarray_get_safe(((Class)self->class_pointer)->dtable,
	    (sidx)method->method_name->sel_id))
		sarray_at_put_safe(((Class)self->class_pointer)->dtable,
		    (sidx)method->method_name->sel_id, method->method_imp);

	return oldimp;
	return oldImp;
#else
	Method method;

	if (newimp == (IMP)0 ||
	if (newImp == (IMP)0 ||
	    (method = class_getClassMethod(self, selector)) == NULL)
		@throw [OFInvalidArgumentException newWithClass: self
						       selector: _cmd];

	/*
	 * Cast needed because it's isa in the Apple runtime, but class_pointer
	 * in the GNU runtime.
	 */
	return class_replaceMethod(((OFObject*)self)->isa, selector, newimp,
	return class_replaceMethod(((OFObject*)self)->isa, selector, newImp,
	    method_getTypeEncoding(method));
#endif
}

+ (IMP)replaceClassMethod: (SEL)selector
      withMethodFromClass: (Class)class;
{
	IMP newimp;
	IMP newImp;

	if (![class isSubclassOfClass: self])
		@throw [OFInvalidArgumentException newWithClass: self
						       selector: _cmd];

	newimp = [class methodForSelector: selector];
	newImp = [class methodForSelector: selector];

	return [self setImplementation: newimp
	return [self setImplementation: newImp
			forClassMethod: selector];
}

+ (IMP)setImplementation: (IMP)newimp
+ (IMP)setImplementation: (IMP)newImp
       forInstanceMethod: (SEL)selector
{
#if defined(OF_OBJFW_RUNTIME)
	if (newimp == (IMP)0 || !class_respondsToSelector(self, selector))
	if (newImp == (IMP)0 || !class_respondsToSelector(self, selector))
		@throw [OFInvalidArgumentException newWithClass: self
						       selector: _cmd];

	return objc_replace_instance_method(self, selector, newimp);
	return objc_replace_instance_method(self, selector, newImp);
#elif defined(OF_OLD_GNU_RUNTIME)
	Method_t method = class_get_instance_method(self, selector);
	IMP oldimp;
	IMP oldImp;

	if (method == NULL)
		@throw [OFInvalidArgumentException newWithClass: self
						       selector: _cmd];

	if ((oldimp = method_get_imp(method)) == (IMP)0 || newimp == (IMP)0)
	if ((oldImp = method_get_imp(method)) == (IMP)0 || newImp == (IMP)0)
		@throw [OFInvalidArgumentException newWithClass: self
						       selector: _cmd];

	method->method_imp = newimp;
	method->method_imp = newImp;

	/* Update the dtable if necessary */
	if (sarray_get_safe(((Class)self)->dtable,
	    (sidx)method->method_name->sel_id))
		sarray_at_put_safe(((Class)self)->dtable,
		    (sidx)method->method_name->sel_id, method->method_imp);

	return oldimp;
	return oldImp;
#else
	Method method;

	if (newimp == (IMP)0 ||
	if (newImp == (IMP)0 ||
	    (method = class_getInstanceMethod(self, selector)) == NULL)
		@throw [OFInvalidArgumentException newWithClass: self
						       selector: _cmd];

	return class_replaceMethod(self, selector, newimp,
	return class_replaceMethod(self, selector, newImp,
	    method_getTypeEncoding(method));
#endif
}

+ (IMP)replaceInstanceMethod: (SEL)selector
	 withMethodFromClass: (Class)class;
{
	IMP newimp;
	IMP newImp;

	if (![class isSubclassOfClass: self])
		@throw [OFInvalidArgumentException newWithClass: self
						       selector: _cmd];

	newimp = [class instanceMethodForSelector: selector];
	newImp = [class instanceMethodForSelector: selector];

	return [self setImplementation: newimp
	return [self setImplementation: newImp
		     forInstanceMethod: selector];
}

- init
{
	return self;
}

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

- (void)addMemoryToPool: (void*)ptr
{
	void **memchunks;
	size_t memchunks_size;
	void **memoryChunks;
	size_t memoryChunksSize;

	memchunks_size = PRE_IVAR->memchunks_size + 1;
	memoryChunksSize = PRE_IVAR->memoryChunksSize + 1;

	if (SIZE_MAX - PRE_IVAR->memchunks_size < 1 ||
	    memchunks_size > SIZE_MAX / sizeof(void*))
	if (SIZE_MAX - PRE_IVAR->memoryChunksSize < 1 ||
	    memoryChunksSize > SIZE_MAX / sizeof(void*))
		@throw [OFOutOfRangeException newWithClass: isa];

	if ((memchunks = realloc(PRE_IVAR->memchunks,
	    memchunks_size * sizeof(void*))) == NULL)
	if ((memoryChunks = realloc(PRE_IVAR->memoryChunks,
	    memoryChunksSize * sizeof(void*))) == NULL)
		@throw [OFOutOfMemoryException newWithClass: isa
					      requestedSize: memchunks_size];
					      requestedSize: memoryChunksSize];

	PRE_IVAR->memchunks = memchunks;
	PRE_IVAR->memchunks[PRE_IVAR->memchunks_size] = ptr;
	PRE_IVAR->memchunks_size = memchunks_size;
	PRE_IVAR->memoryChunks = memoryChunks;
	PRE_IVAR->memoryChunks[PRE_IVAR->memoryChunksSize] = ptr;
	PRE_IVAR->memoryChunksSize = memoryChunksSize;
}

- (void*)allocMemoryWithSize: (size_t)size
{
	void *ptr, **memchunks;
	size_t memchunks_size;
	void *ptr, **memoryChunks;
	size_t memoryChunksSize;

	if (size == 0)
		return NULL;

	memchunks_size = PRE_IVAR->memchunks_size + 1;
	memoryChunksSize = PRE_IVAR->memoryChunksSize + 1;

	if (SIZE_MAX - PRE_IVAR->memchunks_size == 0 ||
	    memchunks_size > SIZE_MAX / sizeof(void*))
	if (SIZE_MAX - PRE_IVAR->memoryChunksSize == 0 ||
	    memoryChunksSize > SIZE_MAX / sizeof(void*))
		@throw [OFOutOfRangeException newWithClass: isa];

	if ((ptr = malloc(size)) == NULL)
		@throw [OFOutOfMemoryException newWithClass: isa
					      requestedSize: size];

	if ((memchunks = realloc(PRE_IVAR->memchunks,
	    memchunks_size * sizeof(void*))) == NULL) {
	if ((memoryChunks = realloc(PRE_IVAR->memoryChunks,
	    memoryChunksSize * sizeof(void*))) == NULL) {
		free(ptr);
		@throw [OFOutOfMemoryException newWithClass: isa
					      requestedSize: memchunks_size];
					      requestedSize: memoryChunksSize];
	}

	PRE_IVAR->memchunks = memchunks;
	PRE_IVAR->memchunks[PRE_IVAR->memchunks_size] = ptr;
	PRE_IVAR->memchunks_size = memchunks_size;
	PRE_IVAR->memoryChunks = memoryChunks;
	PRE_IVAR->memoryChunks[PRE_IVAR->memoryChunksSize] = ptr;
	PRE_IVAR->memoryChunksSize = memoryChunksSize;

	return ptr;
}

- (void*)allocMemoryForNItems: (size_t)nitems
- (void*)allocMemoryForNItems: (size_t)nItems
		     withSize: (size_t)size
{
	if (nitems == 0 || size == 0)
	if (nItems == 0 || size == 0)
		return NULL;

	if (nitems > SIZE_MAX / size)
	if (nItems > SIZE_MAX / size)
		@throw [OFOutOfRangeException newWithClass: isa];

	return [self allocMemoryWithSize: nitems * size];
	return [self allocMemoryWithSize: nItems * size];
}

- (void*)resizeMemory: (void*)ptr
	       toSize: (size_t)size
{
	void **iter;

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

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

	iter = PRE_IVAR->memchunks + PRE_IVAR->memchunks_size;
	iter = PRE_IVAR->memoryChunks + PRE_IVAR->memoryChunksSize;

	while (iter-- > PRE_IVAR->memchunks) {
	while (iter-- > PRE_IVAR->memoryChunks) {
		if (OF_UNLIKELY(*iter == ptr)) {
			if (OF_UNLIKELY((ptr = realloc(ptr, size)) == NULL))
				@throw [OFOutOfMemoryException
				     newWithClass: isa
				    requestedSize: size];

			*iter = ptr;
			return ptr;
		}
	}

	@throw [OFMemoryNotPartOfObjectException newWithClass: isa
						      pointer: ptr];
}

- (void*)resizeMemory: (void*)ptr
	     toNItems: (size_t)nitems
	     toNItems: (size_t)nItems
	     withSize: (size_t)size
{
	if (ptr == NULL)
		return [self allocMemoryForNItems: nitems
		return [self allocMemoryForNItems: nItems
					 withSize: size];

	if (nitems == 0 || size == 0) {
	if (nItems == 0 || size == 0) {
		[self freeMemory: ptr];
		return NULL;
	}

	if (nitems > SIZE_MAX / size)
	if (nItems > SIZE_MAX / size)
		@throw [OFOutOfRangeException newWithClass: isa];

	return [self resizeMemory: ptr
			   toSize: nitems * size];
			   toSize: nItems * size];
}

- (void)freeMemory: (void*)ptr;
{
	void **iter, *last, **memchunks;
	size_t i, memchunks_size;
	void **iter, *last, **memoryChunks;
	size_t i, memoryChunksSize;

	if (ptr == NULL)
		return;

	iter = PRE_IVAR->memchunks + PRE_IVAR->memchunks_size;
	i = PRE_IVAR->memchunks_size;
	iter = PRE_IVAR->memoryChunks + PRE_IVAR->memoryChunksSize;
	i = PRE_IVAR->memoryChunksSize;

	while (iter-- > PRE_IVAR->memchunks) {
	while (iter-- > PRE_IVAR->memoryChunks) {
		i--;

		if (OF_UNLIKELY(*iter == ptr)) {
			memchunks_size = PRE_IVAR->memchunks_size - 1;
			last = PRE_IVAR->memchunks[memchunks_size];
			memoryChunksSize = PRE_IVAR->memoryChunksSize - 1;
			last = PRE_IVAR->memoryChunks[memoryChunksSize];

			assert(PRE_IVAR->memchunks_size != 0 &&
			    memchunks_size <= SIZE_MAX / sizeof(void*));
			assert(PRE_IVAR->memoryChunksSize != 0 &&
			    memoryChunksSize <= SIZE_MAX / sizeof(void*));

			if (OF_UNLIKELY(memchunks_size == 0)) {
			if (OF_UNLIKELY(memoryChunksSize == 0)) {
				free(ptr);
				free(PRE_IVAR->memchunks);
				free(PRE_IVAR->memoryChunks);

				PRE_IVAR->memchunks = NULL;
				PRE_IVAR->memchunks_size = 0;
				PRE_IVAR->memoryChunks = NULL;
				PRE_IVAR->memoryChunksSize = 0;

				return;
			}

			free(ptr);
			PRE_IVAR->memchunks[i] = last;
			PRE_IVAR->memchunks_size = memchunks_size;
			PRE_IVAR->memoryChunks[i] = last;
			PRE_IVAR->memoryChunksSize = memoryChunksSize;

			if (OF_UNLIKELY((memchunks = realloc(
			    PRE_IVAR->memchunks, memchunks_size *
			if (OF_UNLIKELY((memoryChunks = realloc(
			    PRE_IVAR->memoryChunks, memoryChunksSize *
			    sizeof(void*))) == NULL))
				return;

			PRE_IVAR->memchunks = memchunks;
			PRE_IVAR->memoryChunks = memoryChunks;

			return;
		}
	}

	@throw [OFMemoryNotPartOfObjectException newWithClass: isa
						      pointer: ptr];
}

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

	return self;
}

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

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

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

	if (!c)
		[self dealloc];
#endif
}

- autorelease

				destruct(self, cxx_destruct);

			last = destruct;
		} else
			break;
	}

	iter = PRE_IVAR->memchunks + PRE_IVAR->memchunks_size;
	while (iter-- > PRE_IVAR->memchunks)
	iter = PRE_IVAR->memoryChunks + PRE_IVAR->memoryChunksSize;
	while (iter-- > PRE_IVAR->memoryChunks)
		free(*iter);

	if (PRE_IVAR->memchunks != NULL)
		free(PRE_IVAR->memchunks);
	if (PRE_IVAR->memoryChunks != NULL)
		free(PRE_IVAR->memoryChunks);

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

/* Required to use properties with the Apple runtime */
- copyWithZone: (void*)zone
{

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

+ (void*)allocMemoryForNItems: (size_t)nitems
+ (void*)allocMemoryForNItems: (size_t)nItems
                     withSize: (size_t)size
{
	@throw [OFNotImplementedException newWithClass: self
					      selector: _cmd];
}

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

+ (void*)resizeMemory: (void*)ptr
	     toNItems: (size_t)nitems
	     toNItems: (size_t)nItems
	     withSize: (size_t)size
{
	@throw [OFNotImplementedException newWithClass: self
					      selector: _cmd];
}

+ (void)freeMemory: (void*)ptr

	state[2] += c;
	state[3] += d;
	state[4] += e;
}

static inline void
sha1_update(uint32_t *state, uint64_t *count, char *buffer,
    const char *buf, size_t size)
    const char *buf, size_t length)
{
	size_t i, j;

	j = (size_t)((*count >> 3) & 63);
	*count += (size << 3);
	*count += (length << 3);

	if ((j + size) > 63) {
	if ((j + length) > 63) {
		memcpy(&buffer[j], buf, (i = 64 - j));

		sha1_transform(state, buffer);

		for (; i + 63 < size; i += 64)
		for (; i + 63 < length; i += 64)
			sha1_transform(state, &buf[i]);

		j = 0;
	} else
		i = 0;

	memcpy(&buffer[j], &buf[i], size - i);
	memcpy(&buffer[j], &buf[i], length - i);
}

@implementation OFSHA1Hash
+ SHA1Hash
{
	return [[[self alloc] init] autorelease];
}

	state[2] = 0x98BADCFE;
	state[3] = 0x10325476;
	state[4] = 0xC3D2E1F0;

	return self;
}

- (void)updateWithBuffer: (const char*)buf
		  ofSize: (size_t)size
- (void)updateWithBuffer: (const char*)buffer_
		  length: (size_t)length
{
	if (size == 0)
	if (length == 0)
		return;

	if (isCalculated)
		@throw [OFHashAlreadyCalculatedException newWithClass: isa
								 hash: self];

	sha1_update(state, &count, buffer, buf, size);
	sha1_update(state, &count, buffer, buffer_, length);
}

- (uint8_t*)digest
{
	size_t i;
	char   finalcount[8];

	[self freeMemory: cache];
	cache = NULL;
	cacheLength = 0;
}

- (off_t)seekForwardWithOffset: (off_t)offset
{
	off_t retOffset;
	off_t ret;

	retOffset = [self _seekForwardWithOffset: offset - cacheLength];
	ret = [self _seekForwardWithOffset: offset - cacheLength];

	[self freeMemory: cache];
	cache = NULL;
	cacheLength = 0;

	return retOffset;
	return ret;
}

- (off_t)seekToOffsetRelativeToEnd: (off_t)offset
{
	off_t retOffset;
	off_t ret;

	retOffset = [self _seekToOffsetRelativeToEnd: offset];
	ret = [self _seekToOffsetRelativeToEnd: offset];

	[self freeMemory: cache];
	cache = NULL;
	cacheLength = 0;

	return retOffset;
	return ret;
}
@end

{
	return isAtEndOfStream;
}

- (size_t)_readNBytes: (size_t)length
	   intoBuffer: (char*)buffer
{
	ssize_t retLength;
	ssize_t ret;

	if (sock == INVALID_SOCKET)
		@throw [OFNotConnectedException newWithClass: isa
						      socket: self];

	if (isAtEndOfStream) {
		OFReadFailedException *e;

		e = [OFReadFailedException newWithClass: isa
						 stream: self
					requestedLength: length];
#ifndef _WIN32
		e->errNo = ENOTCONN;
#else
		e->errNo = WSAENOTCONN;
#endif

		@throw e;
	}

	if ((retLength = recv(sock, buffer, length, 0)) < 0)
	if ((ret = recv(sock, buffer, length, 0)) < 0)
		@throw [OFReadFailedException newWithClass: isa
						    stream: self
					   requestedLength: length];

	if (retLength == 0)
	if (ret == 0)
		isAtEndOfStream = YES;

	return retLength;
	return ret;
}

- (size_t)_writeNBytes: (size_t)length
	    fromBuffer: (const char*)buffer
{
	ssize_t retLength;
	ssize_t ret;

	if (sock == INVALID_SOCKET)
		@throw [OFNotConnectedException newWithClass: isa
						      socket: self];

	if (isAtEndOfStream) {
		OFWriteFailedException *e;

		e = [OFWriteFailedException newWithClass: isa
						  stream: self
					 requestedLength: length];
#ifndef _WIN32
		e->errNo = ENOTCONN;
#else
		e->errNo = WSAENOTCONN;
#endif

		@throw e;
	}

	if ((retLength = send(sock, buffer, length, 0)) == -1)
	if ((ret = send(sock, buffer, length, 0)) == -1)
		@throw [OFWriteFailedException newWithClass: isa
						     stream: self
					    requestedLength: length];

	return retLength;
	return ret;
}

#ifdef _WIN32
- (void)setBlocking: (BOOL)enable
{
	u_long v = enable;
	isBlocking = enable;

@implementation OFString (Hashing)
- (OFString*)MD5Hash
{
	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
	OFMD5Hash *hash = [OFMD5Hash MD5Hash];
	uint8_t *digest;
	char ret_c[OF_MD5_DIGEST_SIZE * 2];
	char cString[OF_MD5_DIGEST_SIZE * 2];
	size_t i;

	[hash updateWithBuffer: string
			ofSize: length];
			length: length];
	digest = [hash digest];

	for (i = 0; i < OF_MD5_DIGEST_SIZE; i++) {
		uint8_t high, low;

		high = digest[i] >> 4;
		low  = digest[i] & 0x0F;

		ret_c[i * 2] = (high > 9 ? high - 10 + 'a' : high + '0');
		ret_c[i * 2 + 1] = (low > 9 ? low - 10 + 'a' : low + '0');
		cString[i * 2] = (high > 9 ? high - 10 + 'a' : high + '0');
		cString[i * 2 + 1] = (low > 9 ? low - 10 + 'a' : low + '0');
	}

	[pool release];

	return [OFString stringWithCString: ret_c
	return [OFString stringWithCString: cString
				    length: 32];
}

- (OFString*)SHA1Hash
{
	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
	OFMD5Hash *hash = [OFSHA1Hash SHA1Hash];
	uint8_t *digest;
	char ret_c[OF_SHA1_DIGEST_SIZE * 2];
	char cString[OF_SHA1_DIGEST_SIZE * 2];
	size_t i;

	[hash updateWithBuffer: string
			ofSize: length];
			length: length];
	digest = [hash digest];

	for (i = 0; i < OF_SHA1_DIGEST_SIZE; i++) {
		uint8_t high, low;

		high = digest[i] >> 4;
		low  = digest[i] & 0x0F;

		ret_c[i * 2] = (high > 9 ? high - 10 + 'a' : high + '0');
		ret_c[i * 2 + 1] = (low > 9 ? low - 10 + 'a' : low + '0');
		cString[i * 2] = (high > 9 ? high - 10 + 'a' : high + '0');
		cString[i * 2 + 1] = (low > 9 ? low - 10 + 'a' : low + '0');
	}

	[pool release];

	return [OFString stringWithCString: ret_c
	return [OFString stringWithCString: cString
				    length: 40];
}
@end

	TEST(@"-[firstListObject]->next",
	    [[list firstListObject]->next->object isEqual: strings[1]])

	TEST(@"-[lastListObject]",
	    [[list lastListObject]->object isEqual: strings[2]])

	TEST(@"-[lastListObject]->prev",
	    [[list lastListObject]->prev->object isEqual: strings[1]])
	TEST(@"-[lastListObject]->previous",
	    [[list lastListObject]->previous->object isEqual: strings[1]])

	TEST(@"-[removeListObject:]",
	    R([list removeListObject: [list lastListObject]]) &&
	    [[list lastListObject]->object isEqual: strings[1]] &&
	    R([list removeListObject: [list firstListObject]]) &&
	    [[list firstListObject]->object isEqual:
	    [list lastListObject]->object])

	TEST(@"-[insertObject:beforeListObject:]",
	    [list insertObject: strings[0]
	      beforeListObject: [list lastListObject]] &&
	    [[list lastListObject]->prev->object isEqual: strings[0]])
	    [[list lastListObject]->previous->object isEqual: strings[0]])

	TEST(@"-[insertObject:afterListObject:]",
	    [list insertObject: strings[2]
	       afterListObject: [list firstListObject]->next] &&
	    [[list lastListObject]->object isEqual: strings[2]])

	TEST(@"-[count]", [list count] == 3)

	TEST(@"+[md5Hash]", (md5 = [OFMD5Hash MD5Hash]))

	while (![f isAtEndOfStream]) {
		char buf[64];
		size_t len = [f readNBytes: 64
				intoBuffer: buf];
		[md5 updateWithBuffer: buf
			       ofSize: len];
			       length: len];
	}
	[f close];

	TEST(@"-[digest]",
	    !memcmp([md5 digest], testfile_md5, OF_MD5_DIGEST_SIZE))

	EXPECT_EXCEPTION(@"Detect invalid call of -[updateWithBuffer]",
	    OFHashAlreadyCalculatedException, [md5 updateWithBuffer: ""
							     ofSize: 1])
	EXPECT_EXCEPTION(@"Detect invalid call of "
	    @"-[updateWithBuffer:length]", OFHashAlreadyCalculatedException,
	    [md5 updateWithBuffer: ""
			   length: 1])

	[pool drain];
}
@end

	TEST(@"+[sha1Hash]", (sha1 = [OFSHA1Hash SHA1Hash]))

	while (![f isAtEndOfStream]) {
		char buf[64];
		size_t len = [f readNBytes: 64
				intoBuffer: buf];
		[sha1 updateWithBuffer: buf
				ofSize: len];
				length: len];
	}
	[f close];

	TEST(@"-[digest]",
	    !memcmp([sha1 digest], testfile_sha1, OF_SHA1_DIGEST_SIZE))

	EXPECT_EXCEPTION(@"Detect invalid call of -[updateWithBuffer]",
	    OFHashAlreadyCalculatedException, [sha1 updateWithBuffer: ""
							      ofSize: 1])
	EXPECT_EXCEPTION(@"Detect invalid call of "
	    @"-[updateWithBuffer:length:]", OFHashAlreadyCalculatedException,
	    [sha1 updateWithBuffer: ""
			    length: 1])

	[pool drain];
}
@end