/* * 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" /*! @file */ OF_ASSUME_NONNULL_BEGIN @class OFString; @class OFURL; /** * @brief Options for searching in data. * * This is a bit mask. */ typedef enum { /** Search backwards in the data */ OFDataSearchBackwards = 1 } OFDataSearchOptions; /** * @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: (OFRange)range; /** * @brief Returns the range of the data. * * @param data The data to search for * @param options Options modifying search behavior * @param range The range in which to search * @return The range of the first occurrence of the data or a range with * `OFNotFound` as start position if it was not found. */ - (OFRange)rangeOfData: (OFData *)data options: (OFDataSearchOptions)options range: (OFRange)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"