/*
* Copyright (c) 2008-2021 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 "OFObject.h"
#import "OFSerialization.h"
#import "OFMessagePackRepresentation.h"
OF_ASSUME_NONNULL_BEGIN
@class OFString;
@class OFURL;
enum {
OF_DATA_SEARCH_BACKWARDS = 1
};
/**
* @class OFData OFData.h ObjFW/OFData.h
*
* @brief A class for storing arbitrary data in an array.
*
* For security reasons, serialization and deserialization is only implemented
* for OFData with item size 1.
*/
@interface OFData: OFObject <OFCopying, OFMutableCopying, OFComparing,
OFSerialization, OFMessagePackRepresentation>
{
unsigned char *_items;
size_t _count, _itemSize;
bool _freeWhenDone;
@private
OFData *_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) size_t count;
/**
* @brief All elements of the OFData as a C array.
*
* @warning The pointer is only valid until the OFData is changed!
*/
@property (readonly, nonatomic) const void *items OF_RETURNS_INNER_POINTER;
/**
* @brief The first item of the OFData or `NULL`.
*/
@property OF_NULLABLE_PROPERTY (readonly, nonatomic) const void *firstItem
OF_RETURNS_INNER_POINTER;
/**
* @brief The last item of the OFData or `NULL`.
*/
@property OF_NULLABLE_PROPERTY (readonly, nonatomic) const void *lastItem
OF_RETURNS_INNER_POINTER;
/**
* @brief The string representation of the data.
*
* The string representation is a hex dump of the data, grouped by itemSize
* bytes.
*/
@property (readonly, nonatomic) OFString *stringRepresentation;
/**
* @brief A string containing the data in Base64 encoding.
*/
@property (readonly, nonatomic) OFString *stringByBase64Encoding;
/**
* @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
*/
+ (instancetype)dataWithItems: (const void *)items count: (size_t)count;
/**
* @brief Creates a new OFData with the specified `count` items of the
* specified size.
*
* @param items The items to store in the OFData
* @param count The number of items
* @param itemSize The item size of a single item in bytes
* @return A new autoreleased OFData
*/
+ (instancetype)dataWithItems: (const void *)items
count: (size_t)count
itemSize: (size_t)itemSize;
/**
* @brief Creates a new OFData with the specified `count` items of size 1 by
* taking over ownership of the specified items pointer.
*
* @param items The items to store in the OFData
* @param count The number of items
* @param freeWhenDone Whether to free the pointer when it is no longer needed
* by the OFData
* @return A new autoreleased OFData
*/
+ (instancetype)dataWithItemsNoCopy: (void *)items
count: (size_t)count
freeWhenDone: (bool)freeWhenDone;
/**
* @brief Creates a new OFData with the specified `count` items of the
* specified size by taking ownership of the specified items pointer.
*
* @param items The items to store in the OFData
* @param count The number of items
* @param itemSize The item size of a single item in bytes
* @param freeWhenDone Whether to free the pointer when it is no longer needed
* by the OFData
* @return A new autoreleased OFData
*/
+ (instancetype)dataWithItemsNoCopy: (void *)items
count: (size_t)count
itemSize: (size_t)itemSize
freeWhenDone: (bool)freeWhenDone;
#ifdef OF_HAVE_FILES
/**
* @brief Creates a new OFData with an item size of 1, containing the data of
* the specified file.
*
* @param path The path of the file
* @return A new autoreleased OFData
*/
+ (instancetype)dataWithContentsOfFile: (OFString *)path;
#endif
/**
* @brief Creates a new OFData with an item size of 1, containing the data of
* the specified URL.
*
* @param URL The URL to the contents for the OFData
* @return A new autoreleased OFData
*/
+ (instancetype)dataWithContentsOfURL: (OFURL *)URL;
/**
* @brief Creates a new OFData with an item size of 1, containing the data of
* the string representation.
*
* @param string The string representation of the data
* @return A new autoreleased OFData
*/
+ (instancetype)dataWithStringRepresentation: (OFString *)string;
/**
* @brief Creates a new OFData with an item size of 1, containing the data of
* the Base64-encoded string.
*
* @param string The string with the Base64-encoded data
* @return A new autoreleased OFData
*/
+ (instancetype)dataWithBase64EncodedString: (OFString *)string;
/**
* @brief Initialized 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
*/
- (instancetype)initWithItems: (const void *)items count: (size_t)count;
/**
* @brief Initialized an already allocated OFData with the specified `count`
* items of the specified size.
*
* @param items The items to store in the OFData
* @param count The number of items
* @param itemSize The item size of a single item in bytes
* @return An initialized OFData
*/
- (instancetype)initWithItems: (const void *)items
count: (size_t)count
itemSize: (size_t)itemSize;
/**
* @brief Initializes an already allocated OFData with the specified `count`
* items of size 1 by taking over ownership of the specified items
* pointer.
*
* @param items The items to store in the OFData
* @param count The number of items
* @param freeWhenDone Whether to free the pointer when it is no longer needed
* by the OFData
* @return An initialized OFData
*/
- (instancetype)initWithItemsNoCopy: (void *)items
count: (size_t)count
freeWhenDone: (bool)freeWhenDone;
/**
* @brief Initializes an already allocated OFData with the specified `count`
* items of the specified size by taking ownership of the specified
* items pointer.
*
* @param items The items to store in the OFData
* @param count The number of items
* @param itemSize The item size of a single item in bytes
* @param freeWhenDone Whether to free the pointer when it is no longer needed
* by the OFData
* @return An initialized OFData
*/
- (instancetype)initWithItemsNoCopy: (void *)items
count: (size_t)count
itemSize: (size_t)itemSize
freeWhenDone: (bool)freeWhenDone;
#ifdef OF_HAVE_FILES
/**
* @brief Initializes an already allocated OFData with an item size of 1,
* containing the data of the specified file.
*
* @param path The path of the file
* @return An initialized OFData
*/
- (instancetype)initWithContentsOfFile: (OFString *)path;
#endif
/**
* @brief Initializes an already allocated OFData with an item size of 1,
* containing the data of the specified URL.
*
* @param URL The URL to the contents for the OFData
* @return A new autoreleased OFData
*/
- (instancetype)initWithContentsOfURL: (OFURL *)URL;
/**
* @brief Initializes an already allocated OFData with an item size of 1,
* containing the data of the string representation.
*
* @param string The string representation of the data
* @return A new autoreleased OFData
*/
- (instancetype)initWithStringRepresentation: (OFString *)string;
/**
* @brief Initializes an already allocated OFData with an item size of 1,
* containing the data of the Base64-encoded string.
*
* @param string The string with the Base64-encoded data
* @return An initialized OFData
*/
- (instancetype)initWithBase64EncodedString: (OFString *)string;
/**
* @brief Compares the data to other data.
*
* @param data Data to compare the data to
* @return The result of the comparison
*/
- (OFComparisonResult)compare: (OFData *)data;
/**
* @brief Returns a specific item of the OFData.
*
* @param index The number of the item to return
* @return The specified item of the OFData
*/
- (const void *)itemAtIndex: (size_t)index OF_RETURNS_INNER_POINTER;
/**
* @brief Returns the data in the specified range as a new OFData.
*
* @param range The range of the data for the new OFData
* @return The data in the specified range as a new OFData
*/
- (OFData *)subdataWithRange: (of_range_t)range;
/**
* @brief Returns the range of the data.
*
* @param data The data to search for
* @param options Options modifying search behavior.@n
* Possible values are:
* Value | Description
* ---------------------------|-----------------------------
* `OF_DATA_SEARCH_BACKWARDS` | Search backwards in the data
* @param range The range in which to search
* @return The range of the first occurrence of the data or a range with
* `OF_NOT_FOUND` as start position if it was not found.
*/
- (of_range_t)rangeOfData: (OFData *)data
options: (int)options
range: (of_range_t)range;
#ifdef OF_HAVE_FILES
/**
* @brief Writes the OFData into the specified file.
*
* @param path The path of the file to write to
*/
- (void)writeToFile: (OFString *)path;
#endif
/**
* @brief Writes the OFData to the specified URL.
*
* @param URL The URL to write to
*/
- (void)writeToURL: (OFURL *)URL;
@end
OF_ASSUME_NONNULL_END
#import "OFMutableData.h"
#import "OFData+CryptographicHashing.h"
#import "OFData+MessagePackParsing.h"