/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
* Jonathan Schleifer <js@heap.zone>
*
* 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 "OFEnumerator.h"
OF_ASSUME_NONNULL_BEGIN
/*! @file */
/*!
* @struct of_map_table_functions_t OFMapTable.h ObjFW/OFMapTable.h
*
* @brief A struct describing the functions to be used by the map table.
*/
typedef struct {
/// The function to retain keys / objects
void *_Nonnull (*_Nullable retain)(void *object);
/// The function to release keys / objects
void (*_Nullable release)(void *object);
/// The function to hash keys
uint32_t (*_Nullable hash)(void *object);
/// The function to compare keys / objects
bool (*_Nullable equal)(void *object1, void *object2);
} of_map_table_functions_t;
#ifdef OF_HAVE_BLOCKS
/*!
* @brief A block for enumerating an OFMapTable.
*
* @param key The current key
* @param object The current object
* @param stop A pointer to a variable that can be set to true to stop the
* enumeration
*/
typedef void (^of_map_table_enumeration_block_t)(void *key, void *object,
bool *stop);
/*!
* @brief A block for replacing objects in an OFMapTable.
*
* @param key The key of the object to replace
* @param object The object to replace
* @return The object to replace the object with
*/
typedef void *_Nonnull (^of_map_table_replace_block_t)(void *key, void *object);
#endif
@class OFMapTableEnumerator;
/*!
* @class OFMapTable OFMapTable.h ObjFW/OFMapTable.h
*
* @brief A class similar to OFDictionary, but providing more options how keys
* and objects should be retained, released, compared and hashed.
*/
@interface OFMapTable: OFObject <OFCopying, OFFastEnumeration>
{
of_map_table_functions_t _keyFunctions, _objectFunctions;
struct of_map_table_bucket **_buckets;
uint32_t _count, _capacity;
uint8_t _rotate;
unsigned long _mutations;
}
/*!
* The key functions used by the map table.
*/
@property (readonly) of_map_table_functions_t keyFunctions;
/*!
* The object functions used by the map table.
*/
@property (readonly) of_map_table_functions_t objectFunctions;
/*!
* @brief Creates a new OFMapTable with the specified key and object functions.
*
* @param keyFunctions A structure of functions for handling keys
* @param objectFunctions A structure of functions for handling objects
* @return A new autoreleased OFMapTable
*/
+ (instancetype)mapTableWithKeyFunctions: (of_map_table_functions_t)keyFunctions
objectFunctions: (of_map_table_functions_t)
objectFunctions;
/*!
* @brief Creates a new OFMapTable with the specified key functions, object
* functions and capacity.
*
* @param keyFunctions A structure of functions for handling keys
* @param objectFunctions A structure of functions for handling objects
* @param capacity A hint about the count of elements expected to be in the map
* table
* @return A new autoreleased OFMapTable
*/
+ (instancetype)mapTableWithKeyFunctions: (of_map_table_functions_t)keyFunctions
objectFunctions: (of_map_table_functions_t)
objectFunctions
capacity: (size_t)capacity;
/*!
* @brief Initializes an already allocated OFMapTable with the specified key
* and object functions.
*
* @param keyFunctions A structure of functions for handling keys
* @param objectFunctions A structure of functions for handling objects
* @return An initialized OFMapTable
*/
- initWithKeyFunctions: (of_map_table_functions_t)keyFunctions
objectFunctions: (of_map_table_functions_t)objectFunctions;
/*!
* @brief Initializes an already allocated OFMapTable with the specified key
* functions, object functions and capacity.
*
* @param keyFunctions A structure of functions for handling keys
* @param objectFunctions A structure of functions for handling objects
* @param capacity A hint about the count of elements expected to be in the map
* table
* @return An initialized OFMapTable
*/
- initWithKeyFunctions: (of_map_table_functions_t)keyFunctions
objectFunctions: (of_map_table_functions_t)objectFunctions
capacity: (size_t)capacity;
/*!
* @brief Returns the number of objects in the map table.
*
* @return The number of objects in the map table
*/
- (size_t)count;
/*!
* @brief Returns the object for the given key or NULL if the key was not found.
*
* @param key The key whose object should be returned
* @return The object for the given key or NULL if the key was not found
*/
- (nullable void*)objectForKey: (void*)key;
/*!
* @brief Sets an object for a key.
*
* @param key The key to set
* @param object The object to set the key to
*/
- (void)setObject: (void*)object
forKey: (void*)key;
/*!
* @brief Removes the object for the specified key from the map table.
*
* @param key The key whose object should be removed
*/
- (void)removeObjectForKey: (void*)key;
/*!
* @brief Removes all objects.
*/
- (void)removeAllObjects;
/*!
* @brief Checks whether the map table contains an object equal to the
* specified object.
*
* @param object The object which is checked for being in the map table
* @return A boolean whether the map table contains the specified object
*/
- (bool)containsObject: (nullable void*)object;
/*!
* @brief Checks whether the map table contains an object with the specified
* address.
*
* @param object The object which is checked for being in the map table
* @return A boolean whether the map table contains an object with the
* specified address.
*/
- (bool)containsObjectIdenticalTo: (nullable void*)object;
/*!
* @brief Returns an OFMapTableEnumerator to enumerate through the map table's
* keys.
*
* @return An OFMapTableEnumerator to enumerate through the map table's keys
*/
- (OFMapTableEnumerator*)keyEnumerator;
/*!
* @brief Returns an OFMapTableEnumerator to enumerate through the map table's
* objects.
*
* @return An OFMapTableEnumerator to enumerate through the map table's objects
*/
- (OFMapTableEnumerator*)objectEnumerator;
#ifdef OF_HAVE_BLOCKS
/*!
* @brief Executes a block for each key / object pair.
*
* @param block The block to execute for each key / object pair.
*/
- (void)enumerateKeysAndObjectsUsingBlock:
(of_map_table_enumeration_block_t)block;
/*!
* @brief Replaces each object with the object returned by the block.
*
* @param block The block which returns a new object for each object
*/
- (void)replaceObjectsUsingBlock: (of_map_table_replace_block_t)block;
#endif
@end
/*!
* @class OFMapTableEnumerator OFMapTable.h ObjFW/OFMapTable.h
*
* @brief A class which provides methods to enumerate through an OFMapTable's
* keys or objects.
*/
@interface OFMapTableEnumerator: OFObject
{
OFMapTable *_mapTable;
struct of_map_table_bucket **_buckets;
uint32_t _capacity;
unsigned long _mutations;
unsigned long *_mutationsPtr;
uint32_t _position;
}
/*!
* @brief Returns the next object.
*
* @return The next object
*/
- (void*)nextObject;
/*!
* @brief Resets the enumerator, so the next call to nextKey returns the first
* key again.
*/
- (void)reset;
@end
OF_ASSUME_NONNULL_END