ObjFW  Check-in [91fa20d993]

	OFAdjacentSubarray.m		\
	OFArchiveIRIHandler.m		\
	OFBase64.m			\
	OFBitSetCharacterSet.m		\
	OFBytesValue.m			\
	OFCRC16.m			\
	OFCRC32.m			\
	OFConcreteData.m		\
	OFCountedMapTableSet.m		\
	OFEmbeddedIRIHandler.m		\
	OFHuffmanTree.m			\
	OFINIFileSettings.m		\
	OFInvertedCharacterSet.m	\
	OFLHADecompressingStream.m	\
	OFMapTableDictionary.m		\
	OFMapTableSet.m			\
	OFMutableAdjacentArray.m	\
	OFMutableConcreteData.m		\
	OFMutableMapTableDictionary.m	\
	OFMutableMapTableSet.m		\
	OFMutableUTF8String.m		\
	OFNonretainedObjectValue.m	\
	OFPointValue.m			\
	OFPointerValue.m		\
	OFRangeCharacterSet.m		\

/*
 * Copyright (c) 2008-2023 Jonathan Schleifer <js@nil.im>
 *
 * 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.
 */

#import "OFData.h"

OF_ASSUME_NONNULL_BEGIN

@interface OFConcreteData: OFData
{
	unsigned char *_Nullable _items;
	size_t _capacity, _count, _itemSize;
	bool _freeWhenDone;
	OFData *_Nullable _parentData;
}
@end

OF_ASSUME_NONNULL_END

/*
 * Copyright (c) 2008-2023 Jonathan Schleifer <js@nil.im>
 *
 * 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 <limits.h>
#include <string.h>

#import "OFConcreteData.h"

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

@implementation OFConcreteData
- (instancetype)init
{
	return [self initWithItemSize: 1];
}

- (instancetype)initWithItemSize: (size_t)itemSize
{
	self = [super init];

	@try {
		if (itemSize == 0)
			@throw [OFInvalidArgumentException exception];

		_itemSize = itemSize;
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (instancetype)initWithItems: (const void *)items
			count: (size_t)count
		     itemSize: (size_t)itemSize
{
	self = [super init];

	@try {
		if (itemSize == 0)
			@throw [OFInvalidArgumentException exception];

		_items = OFAllocMemory(count, itemSize);
		_capacity = _count = count;
		_itemSize = itemSize;
		_freeWhenDone = true;

		memcpy(_items, items, count * itemSize);
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (instancetype)initWithItemsNoCopy: (void *)items
			      count: (size_t)count
			   itemSize: (size_t)itemSize
		       freeWhenDone: (bool)freeWhenDone
{
	self = [super init];

	@try {
		if (itemSize == 0)
			@throw [OFInvalidArgumentException exception];

		_items = (unsigned char *)items;
		_capacity = _count = count;
		_itemSize = itemSize;
		_freeWhenDone = freeWhenDone;
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (void)dealloc
{
	if (_freeWhenDone)
		OFFreeMemory(_items);

	[_parentData release];

	[super dealloc];
}

- (size_t)count
{
	return _count;
}

- (size_t)itemSize
{
	return _itemSize;
}

- (const void *)items
{
	return _items;
}

- (OFData *)subdataWithRange: (OFRange)range
{
	OFConcreteData *ret;

	if (range.length > SIZE_MAX - range.location ||
	    range.location + range.length > _count)
		@throw [OFOutOfRangeException exception];

	ret = [OFConcreteData
	    dataWithItemsNoCopy: _items + (range.location * _itemSize)
			  count: range.length
		       itemSize: _itemSize
		   freeWhenDone: false];
	ret->_parentData = [(_parentData != nil ? _parentData : self) copy];

	return ret;
}
@end

	void *pool = objc_autoreleasePoolPush();
	id <OFCryptographicHash> hash =
	    [class hashWithAllowsSwappableMemory: true];
	size_t digestSize = [class digestSize];
	const unsigned char *digest;
	char cString[digestSize * 2];

	[hash updateWithBuffer: self->_items
			length: self->_count * self->_itemSize];
	[hash updateWithBuffer: self.items
			length: self.count * self.itemSize];
	[hash calculate];
	digest = hash.digest;

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

		high = digest[i] >> 4;

/**
 * @class OFData OFData.h ObjFW/OFData.h
 *
 * @brief A class for storing arbitrary data in an array.
 */
@interface OFData: OFObject <OFCopying, OFMutableCopying, OFComparing,
    OFMessagePackRepresentation>
{
	unsigned char *_Nullable _items;
	size_t _count, _itemSize;
	bool _freeWhenDone;
@private
	OFData *_Nullable _parentData;
	OF_RESERVE_IVARS(OFData, 4)
}

/**
 * @brief The size of a single item in the OFData in bytes.
 */
@property (readonly, nonatomic) size_t itemSize;

/**
 * @brief The number of items in the OFData.

@property (readonly, nonatomic) OFString *stringRepresentation;

/**
 * @brief A string containing the data in Base64 encoding.
 */
@property (readonly, nonatomic) OFString *stringByBase64Encoding;

/**
 * @brief Creates a new OFData that is empty with an item size of 1.
 *
 * @return A new autoreleased OFData
 */
+ (instancetype)data;

/**
 * @brief Creates a new OFData that is empty with the specified item size.
 *
 * @param itemSize The size of a single element in the OFData
 * @return A new autoreleased OFData
 */
+ (instancetype)dataWithItemSize: (size_t)itemSize;

/**
 * @brief Creates a new OFData with the specified `count` items of size 1.
 *
 * @param items The items to store in the OFData
 * @param count The number of items
 * @return A new autoreleased OFData
 */

 * @param string The string with the Base64-encoded data
 * @return A new autoreleased OFData
 * @throw OFInvalidFormatException The specified string is not correctly
 *				   formatted
 */
+ (instancetype)dataWithBase64EncodedString: (OFString *)string;

/**
 * @brief Initializes an already allocated OFData to be empty with an item size
 *	  of 1.
 *
 * @return An initialized OFData
 */
- (instancetype)init;

/**
 * @brief Initializes an already allocated OFData to be empty with the
 *	  specified item size.
 *
 * @param itemSize The size of a single element in the OFData
 * @return An initialized OFData
 */
- (instancetype)initWithItemSize: (size_t)itemSize;

/**
 * @brief Initializes an already allocated OFData with the specified `count`
 *	  items of size 1.
 *
 * @param items The items to store in the OFData
 * @param count The number of items
 * @return An initialized OFData

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

#import "OFData.h"
#import "OFBase64.h"
#import "OFConcreteData.h"
#import "OFDictionary.h"
#ifdef OF_HAVE_FILES
# import "OFFile.h"
# import "OFFileManager.h"
#endif
#import "OFIRI.h"
#import "OFIRIHandler.h"
#import "OFStream.h"
#import "OFString.h"
#import "OFSystemInfo.h"

#import "OFInvalidArgumentException.h"
#import "OFInvalidFormatException.h"
#import "OFNotImplementedException.h"
#import "OFOutOfMemoryException.h"
#import "OFOutOfRangeException.h"
#import "OFTruncatedDataException.h"
#import "OFUnsupportedProtocolException.h"

static struct {
	Class isa;
} placeholder;

@interface OFDataPlaceholder: OFString
@end

/* References for static linking */
void
_references_to_categories_of_OFData(void)
{
	_OFData_CryptographicHashing_reference = 1;
	_OFData_MessagePackParsing_reference = 1;
}

@implementation OFDataPlaceholder
- (instancetype)init
{
	return (id)[[OFConcreteData alloc] init];
}

- (instancetype)initWithItemSize: (size_t)itemSize
{
	return (id)[[OFConcreteData alloc] initWithItemSize: itemSize];
}

- (instancetype)initWithItems: (const void *)items count: (size_t)count
{
	return (id)[[OFConcreteData alloc] initWithItems: items count: count];
}

- (instancetype)initWithItems: (const void *)items
			count: (size_t)count
		     itemSize: (size_t)itemSize
{
	return (id)[[OFConcreteData alloc] initWithItems: items
						   count: count
						itemSize: itemSize];
}

- (instancetype)initWithItemsNoCopy: (void *)items
			      count: (size_t)count
		       freeWhenDone: (bool)freeWhenDone
{
	return (id)[[OFConcreteData alloc] initWithItemsNoCopy: items
							 count: count
						  freeWhenDone: freeWhenDone];
}

- (instancetype)initWithItemsNoCopy: (void *)items
			      count: (size_t)count
			   itemSize: (size_t)itemSize
		       freeWhenDone: (bool)freeWhenDone
{
	return (id)[[OFConcreteData alloc] initWithItemsNoCopy: items
							 count: count
						      itemSize: itemSize
						  freeWhenDone: freeWhenDone];
}

#ifdef OF_HAVE_FILES
- (instancetype)initWithContentsOfFile: (OFString *)path
{
	return (id)[[OFConcreteData alloc] initWithContentsOfFile: path];
}
#endif

- (instancetype)initWithContentsOfIRI: (OFIRI *)IRI
{
	return (id)[[OFConcreteData alloc] initWithContentsOfIRI: IRI];
}

- (instancetype)initWithStringRepresentation: (OFString *)string
{
	return (id)[[OFConcreteData alloc]
	    initWithStringRepresentation: string];
}

- (instancetype)initWithBase64EncodedString: (OFString *)string
{
	return (id)[[OFConcreteData alloc] initWithBase64EncodedString: string];
}
@end

@implementation OFData
+ (void)initialize
{
	if (self == [OFData class])
		placeholder.isa = [OFDataPlaceholder class];
}
@synthesize itemSize = _itemSize;

+ (instancetype)alloc
{
	if (self == [OFData class])
		return (id)&placeholder;

	return [super alloc];
}

+ (instancetype)data
{
	return [[[self alloc] init] autorelease];
}

+ (instancetype)dataWithItemSize: (size_t)itemSize
{
	return [[[self alloc] initWithItemSize: itemSize] autorelease];
}

+ (instancetype)dataWithItems: (const void *)items count: (size_t)count
{
	return [[[self alloc] initWithItems: items count: count] autorelease];
}

+ (instancetype)dataWithItems: (const void *)items

	    initWithStringRepresentation: string] autorelease];
}

+ (instancetype)dataWithBase64EncodedString: (OFString *)string
{
	return [[[self alloc] initWithBase64EncodedString: string] autorelease];
}

- (instancetype)init
{
	if ([self isMemberOfClass: [OFString class]]) {
		@try {
			[self doesNotRecognizeSelector: _cmd];
		} @catch (id e) {
			[self release];
			@throw e;
		}

		abort();
	}

	return [super init];
}

- (instancetype)initWithItemSize: (size_t)itemSize
{
	OF_INVALID_INIT_METHOD
}

- (instancetype)initWithItems: (const void *)items count: (size_t)count
{
	return [self initWithItems: items count: count itemSize: 1];
}

- (instancetype)initWithItems: (const void *)items
			count: (size_t)count
		     itemSize: (size_t)itemSize
{
	self = [super init];

	OF_INVALID_INIT_METHOD
	@try {
		if (itemSize == 0)
			@throw [OFInvalidArgumentException exception];

		_items = OFAllocMemory(count, itemSize);
		_count = count;
		_itemSize = itemSize;
		_freeWhenDone = true;

		memcpy(_items, items, count * itemSize);
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (instancetype)initWithItemsNoCopy: (void *)items
			      count: (size_t)count
		       freeWhenDone: (bool)freeWhenDone
{
	return [self initWithItemsNoCopy: items
				   count: count
				itemSize: 1
			    freeWhenDone: freeWhenDone];
}

- (instancetype)initWithItemsNoCopy: (void *)items
			      count: (size_t)count
			   itemSize: (size_t)itemSize
		       freeWhenDone: (bool)freeWhenDone
{
	self = [super init];

	OF_INVALID_INIT_METHOD
	@try {
		if (itemSize == 0)
			@throw [OFInvalidArgumentException exception];

		_items = (unsigned char *)items;
		_count = count;
		_itemSize = itemSize;
		_freeWhenDone = freeWhenDone;
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

#ifdef OF_HAVE_FILES
- (instancetype)initWithContentsOfFile: (OFString *)path
{
	char *buffer = NULL;
	OFStreamOffset fileSize;

	return self;
}
#endif

- (instancetype)initWithContentsOfIRI: (OFIRI *)IRI
{
	char *items = NULL, *buffer = NULL;
	self = [super init];
	size_t count = 0;

	@try {
		void *pool = objc_autoreleasePoolPush();
		OFStream *stream = [OFIRIHandler openItemAtIRI: IRI mode: @"r"];
		size_t pageSize;
		unsigned char *buffer;

		_count = 0;
		_itemSize = 1;
		_freeWhenDone = true;

		pageSize = [OFSystemInfo pageSize];
		buffer = OFAllocMemory(1, pageSize);

		@try {
			while (!stream.atEndOfStream) {
				size_t length = [stream
		while (!stream.atEndOfStream) {
			size_t length = [stream readIntoBuffer: buffer
				    readIntoBuffer: buffer
					    length: pageSize];
							length: pageSize];

				if (SIZE_MAX - _count < length)
					@throw [OFOutOfRangeException
			if (SIZE_MAX - count < length)
				@throw [OFOutOfRangeException exception];
					    exception];

				_items = OFResizeMemory(_items,
			items = OFResizeMemory(items, count + length, 1);
				    _count + length, 1);
				memcpy(_items + _count, buffer, length);
				_count += length;
			memcpy(items + count, buffer, length);
			count += length;
			}
		} @finally {
			OFFreeMemory(buffer);
		}

		objc_autoreleasePoolPop(pool);
	} @catch (id e) {
		OFFreeMemory(buffer);
		OFFreeMemory(items);
		[self release];

		@throw e;
	}

	@try {
		self = [self initWithItemsNoCopy: items
					   count: count
				    freeWhenDone: true];
	} @catch (id e) {
		OFFreeMemory(items);
		@throw e;
	}

	return self;
}

- (instancetype)initWithStringRepresentation: (OFString *)string
{
	char *items = NULL;
	self = [super init];
	size_t count = 0;

	@try {
		const char *cString;

		size_t count = [string
		count = [string
		    cStringLengthWithEncoding: OFStringEncodingASCII];
		const char *cString;

		if (count % 2 != 0)
			@throw [OFInvalidFormatException exception];

		count /= 2;

		_items = OFAllocMemory(count, 1);
		items = OFAllocMemory(count, 1);
		_count = count;
		_itemSize = 1;
		_freeWhenDone = true;

		cString = [string cStringWithEncoding: OFStringEncodingASCII];

		for (size_t i = 0; i < count; i++) {
			uint8_t c1 = cString[2 * i];
			uint8_t c2 = cString[2 * i + 1];
			uint8_t byte;

			else if (c2 >= 'a' && c2 <= 'f')
				byte |= c2 - 'a' + 10;
			else if (c2 >= 'A' && c2 <= 'F')
				byte |= c2 - 'A' + 10;
			else
				@throw [OFInvalidFormatException exception];

			_items[i] = byte;
			items[i] = byte;
		}
	} @catch (id e) {
		OFFreeMemory(items);
		[self release];

		@throw e;
	}

	@try {
		self = [self initWithItemsNoCopy: items
					   count: count
				    freeWhenDone: true];
	} @catch (id e) {
		OFFreeMemory(items);
		@throw e;
	}

	return self;
}

- (instancetype)initWithBase64EncodedString: (OFString *)string

	if (!mutable)
		[(OFMutableData *)self makeImmutable];

	return self;
}

- (void)dealloc
- (size_t)count
{
	if (_freeWhenDone)
		OFFreeMemory(_items);

	OF_UNRECOGNIZED_SELECTOR
	[_parentData release];

}
	[super dealloc];
}


- (size_t)count
- (size_t)itemSize
{
	return _count;
	OF_UNRECOGNIZED_SELECTOR
}

- (const void *)items
{
	return _items;
	OF_UNRECOGNIZED_SELECTOR
}

- (const void *)itemAtIndex: (size_t)idx
{
	if (idx >= _count)
	if (idx >= self.count)
		@throw [OFOutOfRangeException exception];

	return _items + idx * _itemSize;
	return (const unsigned char *)self.items + idx * self.itemSize;
}

- (const void *)firstItem
{
	const void *items = self.items;

	if (_items == NULL || _count == 0)
	if (items == NULL || self.count == 0)
		return NULL;

	return _items;
	return items;
}

- (const void *)lastItem
{
	const unsigned char *items = self.items;
	size_t count = self.count;

	if (_items == NULL || _count == 0)
	if (items == NULL || count == 0)
		return NULL;

	return _items + (_count - 1) * _itemSize;
	return items + (count - 1) * self.itemSize;
}

- (id)copy
{
	return [self retain];
}

- (id)mutableCopy
{
	return [[OFMutableData alloc] initWithItems: _items
					      count: _count
					   itemSize: _itemSize];
	return [[OFMutableData alloc] initWithItems: self.items
					      count: self.count
					   itemSize: self.itemSize];
}

- (bool)isEqual: (id)object
{
	size_t count, itemSize;
	OFData *data;

	if (object == self)
		return true;

	if (![object isKindOfClass: [OFData class]])
		return false;

	count = self.count;
	itemSize = self.itemSize;
	data = object;

	if (data.count != _count || data.itemSize != _itemSize)
	if (data.count != count || data.itemSize != itemSize)
		return false;
	if (memcmp(data.items, _items, _count * _itemSize) != 0)
	if (memcmp(data.items, self.items, count * itemSize) != 0)
		return false;

	return true;
}

- (OFComparisonResult)compare: (OFData *)data
{
	int comparison;
	size_t count, minCount;
	size_t count, dataCount, minCount;

	if (![data isKindOfClass: [OFData class]])
		@throw [OFInvalidArgumentException exception];

	if (data.itemSize != _itemSize)
	if (data.itemSize != self.itemSize)
		@throw [OFInvalidArgumentException exception];

	count = self.count;
	count = data.count;
	minCount = (_count > count ? count : _count);
	dataCount = data.count;
	minCount = (count > dataCount ? dataCount : count);

	if ((comparison = memcmp(_items, data.items,
	    minCount * _itemSize)) == 0) {
		if (_count > count)
	if ((comparison = memcmp(self.items, data.items,
	    minCount * self.itemSize)) == 0) {
		if (count > dataCount)
			return OFOrderedDescending;
		if (_count < count)
		if (count < dataCount)
			return OFOrderedAscending;

		return OFOrderedSame;
	}

	if (comparison > 0)
		return OFOrderedDescending;
	else
		return OFOrderedAscending;
}

- (unsigned long)hash
{
	const unsigned char *items = self.items;
	size_t count = self.count, itemSize = self.itemSize;
	unsigned long hash;

	OFHashInit(&hash);

	for (size_t i = 0; i < _count * _itemSize; i++)
		OFHashAddByte(&hash, ((uint8_t *)_items)[i]);
	for (size_t i = 0; i < count * itemSize; i++)
		OFHashAddByte(&hash, items[i]);

	OFHashFinalize(&hash);

	return hash;
}

- (OFData *)subdataWithRange: (OFRange)range
{
	OFData *ret;
	size_t itemSize;

	if (range.length > SIZE_MAX - range.location ||
	    range.location + range.length > _count)
	    range.location + range.length > self.count)
		@throw [OFOutOfRangeException exception];

	itemSize = self.itemSize;
	return [OFData dataWithItems: (const unsigned char *)self.items +
	ret = [OFData dataWithItemsNoCopy: _items + (range.location * _itemSize)
				    count: range.length
				 itemSize: _itemSize
				      (range.location * itemSize)
			       count: range.length
			    itemSize: itemSize];
			     freeWhenDone: false];
	ret->_parentData = [(_parentData != nil ? _parentData : self) copy];

	return ret;
}

- (OFString *)description
{
	OFMutableString *ret = [OFMutableString stringWithString: @"<"];
	const unsigned char *items = self.items;
	size_t count = self.count, itemSize = self.itemSize;

	for (size_t i = 0; i < _count; i++) {
	for (size_t i = 0; i < count; i++) {
		if (i > 0)
			[ret appendString: @" "];

		for (size_t j = 0; j < _itemSize; j++)
			[ret appendFormat: @"%02x", _items[i * _itemSize + j]];
		for (size_t j = 0; j < itemSize; j++)
			[ret appendFormat: @"%02x", items[i * itemSize + j]];
	}

	[ret appendString: @">"];

	[ret makeImmutable];
	return ret;
}

- (OFString *)stringRepresentation
{
	OFMutableString *ret = [OFMutableString string];
	const unsigned char *items = self.items;
	size_t count = self.count, itemSize = self.itemSize;

	for (size_t i = 0; i < _count; i++)
		for (size_t j = 0; j < _itemSize; j++)
			[ret appendFormat: @"%02x", _items[i * _itemSize + j]];
	for (size_t i = 0; i < count; i++)
		for (size_t j = 0; j < itemSize; j++)
			[ret appendFormat: @"%02x", items[i * itemSize + j]];

	[ret makeImmutable];
	return ret;
}

- (OFString *)stringByBase64Encoding
{
	return OFBase64Encode(_items, _count * _itemSize);
	return OFBase64Encode(self.items, self.count * self.itemSize);
}

- (OFRange)rangeOfData: (OFData *)data
	       options: (OFDataSearchOptions)options
		 range: (OFRange)range
{
	const unsigned char *items = self.items;
	size_t count = self.count, itemSize = self.itemSize;
	const char *search;
	size_t searchLength;

	if (range.length > SIZE_MAX - range.location ||
	    range.location + range.length > _count)
	    range.location + range.length > count)
		@throw [OFOutOfRangeException exception];

	if (data == nil || data.itemSize != _itemSize)
	if (data == nil || data.itemSize != itemSize)
		@throw [OFInvalidArgumentException exception];

	if ((searchLength = data.count) == 0)
		return OFMakeRange(0, 0);

	if (searchLength > range.length)
		return OFMakeRange(OFNotFound, 0);

	search = data.items;

	if (options & OFDataSearchBackwards) {
		for (size_t i = range.length - searchLength;; i--) {
			if (memcmp(_items + i * _itemSize, search,
			    searchLength * _itemSize) == 0)
			if (memcmp(items + i * itemSize, search,
			    searchLength * itemSize) == 0)
				return OFMakeRange(i, searchLength);

			/* No match and we're at the last item */
			if (i == 0)
				break;
		}
	} else {
		for (size_t i = range.location;
		    i <= range.length - searchLength; i++)
			if (memcmp(_items + i * _itemSize, search,
			    searchLength * _itemSize) == 0)
			if (memcmp(items + i * itemSize, search,
			    searchLength * itemSize) == 0)
				return OFMakeRange(i, searchLength);
	}

	return OFMakeRange(OFNotFound, 0);
}

#ifdef OF_HAVE_FILES
- (void)writeToFile: (OFString *)path
{
	OFFile *file = [[OFFile alloc] initWithPath: path mode: @"w"];
	@try {
		[file writeBuffer: _items length: _count * _itemSize];
		[file writeBuffer: self.items
			   length: self.count * self.itemSize];
	} @finally {
		[file release];
	}
}
#endif

- (void)writeToIRI: (OFIRI *)IRI
{
	void *pool = objc_autoreleasePoolPush();

	[[OFIRIHandler openItemAtIRI: IRI mode: @"w"] writeData: self];

	objc_autoreleasePoolPop(pool);
}

- (OFData *)messagePackRepresentation
{
	OFMutableData *data;
	size_t count;

	if (_itemSize != 1)
	if (self.itemSize != 1)
		@throw [OFNotImplementedException exceptionWithSelector: _cmd
								 object: self];

	count = self.count;

	if (_count <= UINT8_MAX) {
	if (count <= UINT8_MAX) {
		uint8_t type = 0xC4;
		uint8_t tmp = (uint8_t)_count;
		uint8_t tmp = (uint8_t)count;

		data = [OFMutableData dataWithCapacity: _count + 2];
		data = [OFMutableData dataWithCapacity: count + 2];
		[data addItem: &type];
		[data addItem: &tmp];
	} else if (_count <= UINT16_MAX) {
	} else if (count <= UINT16_MAX) {
		uint8_t type = 0xC5;
		uint16_t tmp = OFToBigEndian16((uint16_t)_count);
		uint16_t tmp = OFToBigEndian16((uint16_t)count);

		data = [OFMutableData dataWithCapacity: _count + 3];
		data = [OFMutableData dataWithCapacity: count + 3];
		[data addItem: &type];
		[data addItems: &tmp count: sizeof(tmp)];
	} else if (_count <= UINT32_MAX) {
	} else if (count <= UINT32_MAX) {
		uint8_t type = 0xC6;
		uint32_t tmp = OFToBigEndian32((uint32_t)_count);
		uint32_t tmp = OFToBigEndian32((uint32_t)count);

		data = [OFMutableData dataWithCapacity: _count + 5];
		data = [OFMutableData dataWithCapacity: count + 5];
		[data addItem: &type];
		[data addItems: &tmp count: sizeof(tmp)];
	} else
		@throw [OFOutOfRangeException exception];

	[data addItems: _items count: _count];
	[data addItems: self.items count: count];
	[data makeImmutable];

	return data;
}
@end

/*
 * Copyright (c) 2008-2023 Jonathan Schleifer <js@nil.im>
 *
 * 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.
 */

#import "OFMutableData.h"

OF_ASSUME_NONNULL_BEGIN

@interface OFMutableConcreteData: OFMutableData
{
	unsigned char *_Nullable _items;
	size_t _capacity, _count, _itemSize;
	bool _freeWhenDone;
	OFData *_Nullable _parentData;
}
@end

OF_ASSUME_NONNULL_END

/*
 * Copyright (c) 2008-2023 Jonathan Schleifer <js@nil.im>
 *
 * 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 <limits.h>
#include <string.h>

#import "OFMutableConcreteData.h"
#import "OFConcreteData.h"

#import "OFInvalidArgumentException.h"
#import "OFOutOfMemoryException.h"
#import "OFOutOfRangeException.h"

@implementation OFMutableConcreteData
+ (void)initialize
{
	if (self == [OFMutableConcreteData class])
		[self inheritMethodsFromClass: [OFConcreteData class]];
}

- (instancetype)initWithItemSize: (size_t)itemSize capacity: (size_t)capacity
{
	self = [super init];

	@try {
		if (itemSize == 0)
			@throw [OFInvalidArgumentException exception];

		_items = OFAllocMemory(capacity, itemSize);
		_itemSize = itemSize;
		_capacity = capacity;
		_freeWhenDone = true;
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (instancetype)initWithItemsNoCopy: (void *)items
			      count: (size_t)count
			   itemSize: (size_t)itemSize
		       freeWhenDone: (bool)freeWhenDone
{
	self = [self initWithItems: items count: count itemSize: itemSize];

	if (freeWhenDone)
		OFFreeMemory(items);

	return self;
}

- (void *)mutableItems
{
	return _items;
}

- (void)addItem: (const void *)item
{
	if (SIZE_MAX - _count < 1)
		@throw [OFOutOfRangeException exception];

	if (_count + 1 > _capacity) {
		_items = OFResizeMemory(_items, _count + 1, _itemSize);
		_capacity = _count + 1;
	}

	memcpy(_items + _count * _itemSize, item, _itemSize);

	_count++;
}

- (void)addItems: (const void *)items count: (size_t)count
{
	if (count > SIZE_MAX - _count)
		@throw [OFOutOfRangeException exception];

	if (_count + count > _capacity) {
		_items = OFResizeMemory(_items, _count + count, _itemSize);
		_capacity = _count + count;
	}

	memcpy(_items + _count * _itemSize, items, count * _itemSize);
	_count += count;
}

- (void)insertItems: (const void *)items
	    atIndex: (size_t)idx
	      count: (size_t)count
{
	if (count > SIZE_MAX - _count || idx > _count)
		@throw [OFOutOfRangeException exception];

	if (_count + count > _capacity) {
		_items = OFResizeMemory(_items, _count + count, _itemSize);
		_capacity = _count + count;
	}

	memmove(_items + (idx + count) * _itemSize, _items + idx * _itemSize,
	    (_count - idx) * _itemSize);
	memcpy(_items + idx * _itemSize, items, count * _itemSize);

	_count += count;
}

- (void)increaseCountBy: (size_t)count
{
	if (count > SIZE_MAX - _count)
		@throw [OFOutOfRangeException exception];

	if (_count + count > _capacity) {
		_items = OFResizeMemory(_items, _count + count, _itemSize);
		_capacity = _count + count;
	}

	memset(_items + _count * _itemSize, '\0', count * _itemSize);
	_count += count;
}

- (void)removeItemsInRange: (OFRange)range
{
	if (range.length > SIZE_MAX - range.location ||
	    range.location + range.length > _count)
		@throw [OFOutOfRangeException exception];

	memmove(_items + range.location * _itemSize,
	    _items + (range.location + range.length) * _itemSize,
	    (_count - range.location - range.length) * _itemSize);

	_count -= range.length;
	@try {
		_items = OFResizeMemory(_items, _count, _itemSize);
		_capacity = _count;
	} @catch (OFOutOfMemoryException *e) {
		/* We don't really care, as we only made it smaller */
	}
}

- (void)removeLastItem
{
	if (_count == 0)
		return;

	_count--;
	@try {
		_items = OFResizeMemory(_items, _count, _itemSize);
		_capacity = _count;
	} @catch (OFOutOfMemoryException *e) {
		/* We don't care, as we only made it smaller */
	}
}

- (void)removeAllItems
{
	OFFreeMemory(_items);
	_items = NULL;
	_count = 0;
	_capacity = 0;
}

- (void)makeImmutable
{
	if (_capacity != _count) {
		@try {
			_items = OFResizeMemory(_items, _count, _itemSize);
			_capacity = _count;
		} @catch (OFOutOfMemoryException *e) {
			/* We don't care, as we only made it smaller */
		}
	}

	object_setClass(self, [OFConcreteData class]);
}
@end

 * file.
 */

#import "OFData.h"

OF_ASSUME_NONNULL_BEGIN

@class OFString;

/**
 * @class OFMutableData OFMutableData.h ObjFW/OFMutableData.h
 *
 * @brief A class for storing and manipulating arbitrary data in an array.
 */
@interface OFMutableData: OFData
{
	size_t _capacity;
	OF_RESERVE_IVARS(OFMutableData, 4)
}

/**
 * @brief All items of the OFMutableData as a C array.
 *
 * @warning The pointer is only valid until the OFMutableData is changed!
 *
 * Modifying the returned array directly is allowed and will change the contents
 * of the data.

/**
 * @brief The last item of the OFMutableData or `NULL`.
 */
@property OF_NULLABLE_PROPERTY (readonly, nonatomic) void *mutableLastItem
    OF_RETURNS_INNER_POINTER;

/**
 * @brief Creates a new OFMutableData with an item size of 1.
 *
 * @return A new autoreleased OFMutableData
 */
+ (instancetype)data;

/**
 * @brief Creates a new OFMutableData whose items all have the same specified
 *	  size.
 *
 * @param itemSize The size of a single element in the OFMutableData
 * @return A new autoreleased OFMutableData
 */
+ (instancetype)dataWithItemSize: (size_t)itemSize;

/**
 * @brief Creates a new OFMutableData with enough memory to hold the specified
 *	  number of items which all have an item size of 1.
 *
 * @param capacity The initial capacity for the OFMutableData
 * @return A new autoreleased OFMutableData
 */
+ (instancetype)dataWithCapacity: (size_t)capacity;

/**
 * @brief Creates a new OFMutableData with enough memory to hold the specified
 *	  number of items which all have the same specified size.
 *
 * @param itemSize The size of a single element in the OFMutableData
 * @param capacity The initial capacity for the OFMutableData
 * @return A new autoreleased OFMutableData
 */
+ (instancetype)dataWithItemSize: (size_t)itemSize capacity: (size_t)capacity;

/**
 * @brief Initializes an already allocated OFMutableData with an item size of 1.
 *
 * @return An initialized OFMutableData
 */
- (instancetype)init;

/**
 * @brief Initializes an already allocated OFMutableData whose items all have
 *	  the same size.
 *
 * @param itemSize The size of a single element in the OFMutableData
 * @return An initialized OFMutableData
 */
- (instancetype)initWithItemSize: (size_t)itemSize;

/**
 * @brief Initializes an already allocated OFMutableData with enough memory to
 *	  hold the the specified number of items which all have an item size of
 *	  1.
 *
 * @param capacity The initial capacity for the OFMutableData
 * @return An initialized OFMutableData

#include "config.h"

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

#import "OFMutableData.h"
#import "OFString.h"
#import "OFMutableConcreteData.h"

#import "OFInvalidArgumentException.h"
#import "OFOutOfMemoryException.h"
#import "OFOutOfRangeException.h"

static struct {
	Class isa;
} placeholder;

@interface OFMutableDataPlaceholder: OFMutableData
@end

@implementation OFMutableDataPlaceholder
- (instancetype)init
{
	return (id)[[OFMutableConcreteData alloc] init];
}

- (instancetype)initWithItemSize: (size_t)itemSize
{
	return (id)[[OFMutableConcreteData alloc] initWithItemSize: itemSize];
}

- (instancetype)initWithItems: (const void *)items count: (size_t)count
{
	return (id)[[OFMutableConcreteData alloc] initWithItems: items
							  count: count];
}

- (instancetype)initWithItems: (const void *)items
			count: (size_t)count
		     itemSize: (size_t)itemSize
{
	return (id)[[OFMutableConcreteData alloc] initWithItems: items
							  count: count
						       itemSize: itemSize];
}

- (instancetype)initWithItemsNoCopy: (void *)items
			      count: (size_t)count
		       freeWhenDone: (bool)freeWhenDone
{
	return (id)[[OFMutableConcreteData alloc]
	    initWithItemsNoCopy: items
			  count: count
		   freeWhenDone: freeWhenDone];
}

- (instancetype)initWithItemsNoCopy: (void *)items
			      count: (size_t)count
			   itemSize: (size_t)itemSize
		       freeWhenDone: (bool)freeWhenDone
{
	return (id)[[OFMutableConcreteData alloc]
	    initWithItemsNoCopy: items
			  count: count
		       itemSize: itemSize
		   freeWhenDone: freeWhenDone];
}

#ifdef OF_HAVE_FILES
- (instancetype)initWithContentsOfFile: (OFString *)path
{
	return (id)[[OFMutableConcreteData alloc] initWithContentsOfFile: path];
}
#endif

- (instancetype)initWithContentsOfIRI: (OFIRI *)IRI
{
	return (id)[[OFMutableConcreteData alloc] initWithContentsOfIRI: IRI];
}

- (instancetype)initWithStringRepresentation: (OFString *)string
{
	return (id)[[OFMutableConcreteData alloc]
	    initWithStringRepresentation: string];
}

- (instancetype)initWithBase64EncodedString: (OFString *)string
{
	return (id)[[OFMutableConcreteData alloc]
	    initWithBase64EncodedString: string];
}

- (instancetype)initWithCapacity: (size_t)capacity
{
	return (id)[[OFMutableConcreteData alloc] initWithCapacity: capacity];
}

- (instancetype)initWithItemSize: (size_t)itemSize capacity: (size_t)capacity
{
	return (id)[[OFMutableConcreteData alloc] initWithItemSize: itemSize
							  capacity: capacity];
}
@end

@implementation OFMutableData
+ (void)initialize
{
	if (self == [OFMutableData class])
		placeholder.isa = [OFMutableDataPlaceholder class];
}

+ (instancetype)data
+ (instancetype)alloc
{
	if (self == [OFMutableData class])
		return (id)&placeholder;
	return [[[self alloc] init] autorelease];

	return [super alloc];
}

+ (instancetype)dataWithItemSize: (size_t)itemSize
{
	return [[[self alloc] initWithItemSize: itemSize] autorelease];
}

+ (instancetype)dataWithCapacity: (size_t)capacity
{
	return [[[self alloc] initWithCapacity: capacity] autorelease];
}

+ (instancetype)dataWithItemSize: (size_t)itemSize capacity: (size_t)capacity
{
	return [[[self alloc] initWithItemSize: itemSize
				      capacity: capacity] autorelease];
}

- (instancetype)init
{
	self = [super init];

	_itemSize = 1;
	_freeWhenDone = true;

	return self;
}

- (instancetype)initWithItemSize: (size_t)itemSize
{
	self = [super init];

	@try {
		if (itemSize == 0)
			@throw [OFInvalidArgumentException exception];

		_itemSize = itemSize;
		_freeWhenDone = true;
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
	return [self initWithItemSize: 1 capacity: 0];
}

- (instancetype)initWithCapacity: (size_t)capacity
{
	return [self initWithItemSize: 1
	return [self initWithItemSize: 1 capacity: capacity];
			     capacity: capacity];
}

- (instancetype)initWithItemSize: (size_t)itemSize capacity: (size_t)capacity
{
	self = [super init];

	OF_INVALID_INIT_METHOD
	@try {
		if (itemSize == 0)
			@throw [OFInvalidArgumentException exception];

		_items = OFAllocMemory(capacity, itemSize);
		_itemSize = itemSize;
		_capacity = capacity;
		_freeWhenDone = true;
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (instancetype)initWithItems: (const void *)items
			count: (size_t)count
		     itemSize: (size_t)itemSize
{
	self = [super initWithItems: items count: count itemSize: itemSize];

	_capacity = _count;

	return self;
}

- (instancetype)initWithItemsNoCopy: (void *)items
			      count: (size_t)count
			   itemSize: (size_t)itemSize
		       freeWhenDone: (bool)freeWhenDone
{
	self = [self initWithItems: items count: count itemSize: itemSize];

	if (freeWhenDone)
		OFFreeMemory(items);

	return self;
}

- (instancetype)initWithStringRepresentation: (OFString *)string
{
	self = [super initWithStringRepresentation: string];

	_capacity = _count;

	return self;
}

- (void *)mutableItems
{
	return _items;
	OF_UNRECOGNIZED_SELECTOR
}

- (void *)mutableItemAtIndex: (size_t)idx
{
	if (idx >= _count)
	if (idx >= self.count)
		@throw [OFOutOfRangeException exception];

	return _items + idx * _itemSize;
	return (unsigned char *)self.mutableItems + idx * self.itemSize;
}

- (void *)mutableFirstItem
{
	void *mutableItems = self.mutableItems;
	if (_items == NULL || _count == 0)

	if (mutableItems == NULL || self.count == 0)
		return NULL;

	return _items;
	return mutableItems;
}

- (void *)mutableLastItem
{
	unsigned char *mutableItems = self.mutableItems;
	size_t count = self.count;

	if (_items == NULL || _count == 0)
	if (mutableItems == NULL || count == 0)
		return NULL;

	return _items + (_count - 1) * _itemSize;
	return mutableItems + (count - 1) * self.itemSize;
}

- (OFData *)subdataWithRange: (OFRange)range
{
	size_t itemSize;

	if (range.length > SIZE_MAX - range.location ||
	    range.location + range.length > _count)
	    range.location + range.length > self.count)
		@throw [OFOutOfRangeException exception];

	itemSize = self.itemSize;
	return [OFData dataWithItems: _items + (range.location * _itemSize)
	return [OFData dataWithItems: (unsigned char *)self.mutableItems +
				      (range.location * itemSize)
			       count: range.length
			    itemSize: _itemSize];
			    itemSize: itemSize];
}

- (void)addItem: (const void *)item
{
	if (SIZE_MAX - _count < 1)
		@throw [OFOutOfRangeException exception];

	[self insertItems: item atIndex: self.count count: 1];
	if (_count + 1 > _capacity) {
		_items = OFResizeMemory(_items, _count + 1, _itemSize);
		_capacity = _count + 1;
	}

	memcpy(_items + _count * _itemSize, item, _itemSize);

	_count++;
}

- (void)insertItem: (const void *)item atIndex: (size_t)idx
{
	[self insertItems: item atIndex: idx count: 1];
}

- (void)addItems: (const void *)items count: (size_t)count
{
	if (count > SIZE_MAX - _count)
		@throw [OFOutOfRangeException exception];

	[self insertItems: items atIndex: self.count count: count];
	if (_count + count > _capacity) {
		_items = OFResizeMemory(_items, _count + count, _itemSize);
		_capacity = _count + count;
	}

	memcpy(_items + _count * _itemSize, items, count * _itemSize);
	_count += count;
}

- (void)insertItems: (const void *)items
	    atIndex: (size_t)idx
	      count: (size_t)count
{
	if (count > SIZE_MAX - _count || idx > _count)
		@throw [OFOutOfRangeException exception];

	OF_UNRECOGNIZED_SELECTOR
	if (_count + count > _capacity) {
		_items = OFResizeMemory(_items, _count + count, _itemSize);
		_capacity = _count + count;
	}

	memmove(_items + (idx + count) * _itemSize, _items + idx * _itemSize,
	    (_count - idx) * _itemSize);
	memcpy(_items + idx * _itemSize, items, count * _itemSize);

	_count += count;
}

- (void)increaseCountBy: (size_t)count
{
	if (count > SIZE_MAX - _count)
		@throw [OFOutOfRangeException exception];

	OF_UNRECOGNIZED_SELECTOR
	if (_count + count > _capacity) {
		_items = OFResizeMemory(_items, _count + count, _itemSize);
		_capacity = _count + count;
	}

	memset(_items + _count * _itemSize, '\0', count * _itemSize);
	_count += count;
}

- (void)removeItemAtIndex: (size_t)idx
{
	[self removeItemsInRange: OFMakeRange(idx, 1)];
}

- (void)removeItemsInRange: (OFRange)range
{
	if (range.length > SIZE_MAX - range.location ||
	    range.location + range.length > _count)
		@throw [OFOutOfRangeException exception];

	OF_UNRECOGNIZED_SELECTOR
	memmove(_items + range.location * _itemSize,
	    _items + (range.location + range.length) * _itemSize,
	    (_count - range.location - range.length) * _itemSize);

	_count -= range.length;
	@try {
		_items = OFResizeMemory(_items, _count, _itemSize);
		_capacity = _count;
	} @catch (OFOutOfMemoryException *e) {
		/* We don't really care, as we only made it smaller */
	}
}

- (void)removeLastItem
{
	if (_count == 0)
	size_t count = self.count;
		return;

	_count--;
	@try {
	if (count == 0)
		return;
		_items = OFResizeMemory(_items, _count, _itemSize);
		_capacity = _count;
	} @catch (OFOutOfMemoryException *e) {
		/* We don't care, as we only made it smaller */
	}

	[self removeItemsInRange: OFMakeRange(count - 1, 1)];
}

- (void)removeAllItems
{
	OFFreeMemory(_items);
	_items = NULL;
	_count = 0;
	[self removeItemsInRange: OFMakeRange(0, self.count)];
	_capacity = 0;
}

- (id)copy
{
	return [[OFData alloc] initWithItems: _items
				       count: _count
				    itemSize: _itemSize];
	return [[OFData alloc] initWithItems: self.mutableItems
				       count: self.count
				    itemSize: self.itemSize];
}

- (void)makeImmutable
{
	if (_capacity != _count) {
		@try {
			_items = OFResizeMemory(_items, _count, _itemSize);
			_capacity = _count;
		} @catch (OFOutOfMemoryException *e) {
			/* We don't care, as we only made it smaller */
		}
}
	}

	object_setClass(self, [OFData class]);
}
@end

 *	    deallocated. Check the @ref allowsSwappableMemory property to see
 *	    whether a particular OFSecureData might be allocated in swappable
 *	    memory.
 */
OF_SUBCLASSING_RESTRICTED
@interface OFSecureData: OFData
{
	unsigned char *_Nullable _items;
	size_t _count, _itemSize;
	bool _freeWhenDone, _allowsSwappableMemory;
	void *_page;
	bool _allowsSwappableMemory;
}

/**
 * @brief Whether the data may be stored in swappable memory.
 */
@property (readonly, nonatomic) bool allowsSwappableMemory;

 * @return An initialized OFSecureData
 */
- (instancetype)initWithCount: (size_t)count
		     itemSize: (size_t)itemSize
	allowsSwappableMemory: (bool)allowsSwappableMemory
    OF_DESIGNATED_INITIALIZER;

- (instancetype)init OF_UNAVAILABLE;
- (instancetype)initWithItemSize: (size_t)itemSize OF_UNAVAILABLE;
- (instancetype)initWithItems: (const void *)items
			count: (size_t)count OF_UNAVAILABLE;
- (instancetype)initWithItems: (const void *)items
			count: (size_t)count
		     itemSize: (size_t)itemSize OF_UNAVAILABLE;
- (instancetype)initWithItemsNoCopy: (void *)items
			      count: (size_t)count

	allowsSwappableMemory: (bool)allowsSwappableMemory
{
	return [[[self alloc] initWithCount: count
				   itemSize: itemSize
		      allowsSwappableMemory: allowsSwappableMemory]
	    autorelease];
}

+ (instancetype)dataWithItems: (const void *)items
			count: (size_t)count
{
	OF_UNRECOGNIZED_SELECTOR
}

+ (instancetype)dataWithItems: (const void *)items
			count: (size_t)count
		     itemSize: (size_t)itemSize
{
	OF_UNRECOGNIZED_SELECTOR
}

+ (instancetype)dataWithItemsNoCopy: (void *)items
			      count: (size_t)count
		       freeWhenDone: (bool)freeWhenDone
{
	OF_UNRECOGNIZED_SELECTOR
}

+ (instancetype)dataWithItemsNoCopy: (void *)items
			      count: (size_t)count
			   itemSize: (size_t)itemSize
		       freeWhenDone: (bool)freeWhenDone
{
	OF_UNRECOGNIZED_SELECTOR
}

#ifdef OF_HAVE_FILES
+ (instancetype)dataWithContentsOfFile: (OFString *)path
{
	OF_UNRECOGNIZED_SELECTOR
}
#endif

+ (instancetype)dataWithContentsOfIRI: (OFIRI *)IRI
{
	OF_UNRECOGNIZED_SELECTOR
}

+ (instancetype)dataWithStringRepresentation: (OFString *)string
{
	OF_UNRECOGNIZED_SELECTOR
}

+ (instancetype)dataWithBase64EncodedString: (OFString *)string
{
	OF_UNRECOGNIZED_SELECTOR
}


- (instancetype)initWithCount: (size_t)count
	allowsSwappableMemory: (bool)allowsSwappableMemory
{
	return [self initWithCount: count
			  itemSize: 1
	     allowsSwappableMemory: allowsSwappableMemory];

		[self release];
		@throw e;
	}

	return self;
}

- (instancetype)initWithItems: (const void *)items count: (size_t)count
- (instancetype)init
{
	OF_INVALID_INIT_METHOD
}

- (instancetype)initWithItems: (const void *)items
- (instancetype)initWithItemSize: (size_t)itemSize
			count: (size_t)count
		     itemSize: (size_t)itemSize
{
	OF_INVALID_INIT_METHOD
}

- (instancetype)initWithItemsNoCopy: (void *)items
			      count: (size_t)count
		       freeWhenDone: (bool)freeWhenDone
{
	OF_INVALID_INIT_METHOD
}

- (instancetype)initWithItemsNoCopy: (void *)items
			      count: (size_t)count
			   itemSize: (size_t)itemSize
		       freeWhenDone: (bool)freeWhenDone
{
	OF_INVALID_INIT_METHOD
}

#ifdef OF_HAVE_FILES
- (instancetype)initWithContentsOfFile: (OFString *)path
{

				freeMemory(_page, _items, _count * _itemSize);

			removePageIfEmpty(_page);
		}
	}
#endif

	if (_freeWhenDone)
		OFFreeMemory(_items);

	[super dealloc];
}

- (size_t)count
{
	return _count;
}

- (size_t)itemSize
{
	return _itemSize;
}

- (const void *)items
{
	return _items;
}

- (void *)mutableItems
{
	return _items;
}

- (void *)mutableItemAtIndex: (size_t)idx

	return copy;
}

- (bool)isEqual: (id)object
{
	OFData *otherData;
	const unsigned char *otherDataItems;
	unsigned char diff;

	if (object == self)
		return true;

	if (![object isKindOfClass: [OFData class]])
		return false;

	otherData = object;
	otherDataItems = otherData.items;

	if (otherData->_count != _count || otherData->_itemSize != _itemSize)
	if (otherData.count != _count || otherData.itemSize != _itemSize)
		return false;

	diff = 0;

	for (size_t i = 0; i < _count * _itemSize; i++)
		diff |= otherData->_items[i] ^ _items[i];
		diff |= otherDataItems[i] ^ _items[i];

	return (diff == 0);
}

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